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 (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 958                     codec_dai->tx_mask)
 959                         soc_pcm_codec_params_fixup(&codec_params,
 960                                                    codec_dai->tx_mask);
 961
 962                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
 963                     codec_dai->rx_mask)
 964                         soc_pcm_codec_params_fixup(&codec_params,
 965                                                    codec_dai->rx_mask);
 966
 967                 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
 968                 if(ret < 0)
 969                         goto codec_err;
 970
 971                 codec_dai->rate = params_rate(&codec_params);
 972                 codec_dai->channels = params_channels(&codec_params);
 973                 codec_dai->sample_bits = snd_pcm_format_physical_width(
 974                                                 params_format(&codec_params));
 975
 976                 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
 977         }
 978
 979         ret = soc_dai_hw_params(substream, params, cpu_dai);
 980         if (ret < 0)
 981                 goto interface_err;
 982
 983         for_each_rtdcom(rtd, rtdcom) {
 984                 component = rtdcom->component;
 985
 986                 if (!component->driver->ops ||
 987                     !component->driver->ops->hw_params)
 988                         continue;
 989
 990                 ret = component->driver->ops->hw_params(substream, params);
 991                 if (ret < 0) {
 992                         dev_err(component->dev,
 993                                 "ASoC: %s hw params failed: %d\n",
 994                                 component->name, ret);
 995                         goto component_err;
 996                 }
 997         }
 998         component = NULL;
 999
1000         /* store the parameters for each DAIs */
1001         cpu_dai->rate = params_rate(params);
1002         cpu_dai->channels = params_channels(params);
1003         cpu_dai->sample_bits =
1004                 snd_pcm_format_physical_width(params_format(params));
1005
1006         snd_soc_dapm_update_dai(substream, params, cpu_dai);
1007
1008         ret = soc_pcm_params_symmetry(substream, params);
1009         if (ret)
1010                 goto component_err;
1011 out:
1012         mutex_unlock(&rtd->pcm_mutex);
1013         return ret;
1014
1015 component_err:
1016         soc_pcm_components_hw_free(substream, component);
1017
1018         if (cpu_dai->driver->ops->hw_free)
1019                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1020
1021 interface_err:
1022         i = rtd->num_codecs;
1023
1024 codec_err:
1025         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
1026                 if (codec_dai->driver->ops->hw_free)
1027                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1028                 codec_dai->rate = 0;
1029         }
1030
1031         if (rtd->dai_link->ops->hw_free)
1032                 rtd->dai_link->ops->hw_free(substream);
1033
1034         mutex_unlock(&rtd->pcm_mutex);
1035         return ret;
1036 }
1037
1038 /*
1039  * Frees resources allocated by hw_params, can be called multiple times
1040  */
1041 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1042 {
1043         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1044         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1045         struct snd_soc_dai *codec_dai;
1046         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1047         int i;
1048
1049         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1050
1051         /* clear the corresponding DAIs parameters when going to be inactive */
1052         if (cpu_dai->active == 1) {
1053                 cpu_dai->rate = 0;
1054                 cpu_dai->channels = 0;
1055                 cpu_dai->sample_bits = 0;
1056         }
1057
1058         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1059                 if (codec_dai->active == 1) {
1060                         codec_dai->rate = 0;
1061                         codec_dai->channels = 0;
1062                         codec_dai->sample_bits = 0;
1063                 }
1064         }
1065
1066         /* apply codec digital mute */
1067         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1068                 if ((playback && codec_dai->playback_active == 1) ||
1069                     (!playback && codec_dai->capture_active == 1))
1070                         snd_soc_dai_digital_mute(codec_dai, 1,
1071                                                  substream->stream);
1072         }
1073
1074         /* free any machine hw params */
1075         if (rtd->dai_link->ops->hw_free)
1076                 rtd->dai_link->ops->hw_free(substream);
1077
1078         /* free any component resources */
1079         soc_pcm_components_hw_free(substream, NULL);
1080
1081         /* now free hw params for the DAIs  */
1082         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1083                 if (codec_dai->driver->ops->hw_free)
1084                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1085         }
1086
1087         if (cpu_dai->driver->ops->hw_free)
1088                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1089
1090         mutex_unlock(&rtd->pcm_mutex);
1091         return 0;
1092 }
1093
1094 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1095 {
1096         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1097         struct snd_soc_component *component;
1098         struct snd_soc_rtdcom_list *rtdcom;
1099         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1100         struct snd_soc_dai *codec_dai;
1101         int i, ret;
1102
1103         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1104                 if (codec_dai->driver->ops->trigger) {
1105                         ret = codec_dai->driver->ops->trigger(substream,
1106                                                               cmd, codec_dai);
1107                         if (ret < 0)
1108                                 return ret;
1109                 }
1110         }
1111
1112         for_each_rtdcom(rtd, rtdcom) {
1113                 component = rtdcom->component;
1114
1115                 if (!component->driver->ops ||
1116                     !component->driver->ops->trigger)
1117                         continue;
1118
1119                 ret = component->driver->ops->trigger(substream, cmd);
1120                 if (ret < 0)
1121                         return ret;
1122         }
1123
1124         if (cpu_dai->driver->ops->trigger) {
1125                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1126                 if (ret < 0)
1127                         return ret;
1128         }
1129
1130         if (rtd->dai_link->ops->trigger) {
1131                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1132                 if (ret < 0)
1133                         return ret;
1134         }
1135
1136         return 0;
1137 }
1138
1139 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1140                                    int cmd)
1141 {
1142         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1143         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1144         struct snd_soc_dai *codec_dai;
1145         int i, ret;
1146
1147         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1148                 if (codec_dai->driver->ops->bespoke_trigger) {
1149                         ret = codec_dai->driver->ops->bespoke_trigger(substream,
1150                                                                 cmd, codec_dai);
1151                         if (ret < 0)
1152                                 return ret;
1153                 }
1154         }
1155
1156         if (cpu_dai->driver->ops->bespoke_trigger) {
1157                 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1158                 if (ret < 0)
1159                         return ret;
1160         }
1161         return 0;
1162 }
1163 /*
1164  * soc level wrapper for pointer callback
1165  * If cpu_dai, codec_dai, component driver has the delay callback, then
1166  * the runtime->delay will be updated accordingly.
1167  */
1168 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1169 {
1170         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1171         struct snd_soc_component *component;
1172         struct snd_soc_rtdcom_list *rtdcom;
1173         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1174         struct snd_soc_dai *codec_dai;
1175         struct snd_pcm_runtime *runtime = substream->runtime;
1176         snd_pcm_uframes_t offset = 0;
1177         snd_pcm_sframes_t delay = 0;
1178         snd_pcm_sframes_t codec_delay = 0;
1179         int i;
1180
1181         /* clearing the previous total delay */
1182         runtime->delay = 0;
1183
1184         for_each_rtdcom(rtd, rtdcom) {
1185                 component = rtdcom->component;
1186
1187                 if (!component->driver->ops ||
1188                     !component->driver->ops->pointer)
1189                         continue;
1190
1191                 /* FIXME: use 1st pointer */
1192                 offset = component->driver->ops->pointer(substream);
1193                 break;
1194         }
1195         /* base delay if assigned in pointer callback */
1196         delay = runtime->delay;
1197
1198         if (cpu_dai->driver->ops->delay)
1199                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1200
1201         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1202                 if (codec_dai->driver->ops->delay)
1203                         codec_delay = max(codec_delay,
1204                                         codec_dai->driver->ops->delay(substream,
1205                                                                     codec_dai));
1206         }
1207         delay += codec_delay;
1208
1209         runtime->delay = delay;
1210
1211         return offset;
1212 }
1213
1214 /* connect a FE and BE */
1215 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1216                 struct snd_soc_pcm_runtime *be, int stream)
1217 {
1218         struct snd_soc_dpcm *dpcm;
1219         unsigned long flags;
1220
1221         /* only add new dpcms */
1222         for_each_dpcm_be(fe, stream, dpcm) {
1223                 if (dpcm->be == be && dpcm->fe == fe)
1224                         return 0;
1225         }
1226
1227         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1228         if (!dpcm)
1229                 return -ENOMEM;
1230
1231         dpcm->be = be;
1232         dpcm->fe = fe;
1233         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1234         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1235         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1236         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1237         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1238         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1239
1240         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1241                         stream ? "capture" : "playback",  fe->dai_link->name,
1242                         stream ? "<-" : "->", be->dai_link->name);
1243
1244 #ifdef CONFIG_DEBUG_FS
1245         if (fe->debugfs_dpcm_root)
1246                 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1247                                 fe->debugfs_dpcm_root, &dpcm->state);
1248 #endif
1249         return 1;
1250 }
1251
1252 /* reparent a BE onto another FE */
1253 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1254                         struct snd_soc_pcm_runtime *be, int stream)
1255 {
1256         struct snd_soc_dpcm *dpcm;
1257         struct snd_pcm_substream *fe_substream, *be_substream;
1258
1259         /* reparent if BE is connected to other FEs */
1260         if (!be->dpcm[stream].users)
1261                 return;
1262
1263         be_substream = snd_soc_dpcm_get_substream(be, stream);
1264
1265         for_each_dpcm_fe(be, stream, dpcm) {
1266                 if (dpcm->fe == fe)
1267                         continue;
1268
1269                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1270                         stream ? "capture" : "playback",
1271                         dpcm->fe->dai_link->name,
1272                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1273
1274                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1275                 be_substream->runtime = fe_substream->runtime;
1276                 break;
1277         }
1278 }
1279
1280 /* disconnect a BE and FE */
1281 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1282 {
1283         struct snd_soc_dpcm *dpcm, *d;
1284         unsigned long flags;
1285
1286         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1287                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1288                                 stream ? "capture" : "playback",
1289                                 dpcm->be->dai_link->name);
1290
1291                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1292                         continue;
1293
1294                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1295                         stream ? "capture" : "playback", fe->dai_link->name,
1296                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1297
1298                 /* BEs still alive need new FE */
1299                 dpcm_be_reparent(fe, dpcm->be, stream);
1300
1301 #ifdef CONFIG_DEBUG_FS
1302                 debugfs_remove(dpcm->debugfs_state);
1303 #endif
1304                 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1305                 list_del(&dpcm->list_be);
1306                 list_del(&dpcm->list_fe);
1307                 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1308                 kfree(dpcm);
1309         }
1310 }
1311
1312 /* get BE for DAI widget and stream */
1313 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1314                 struct snd_soc_dapm_widget *widget, int stream)
1315 {
1316         struct snd_soc_pcm_runtime *be;
1317         struct snd_soc_dai *dai;
1318         int i;
1319
1320         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1321
1322         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1323                 for_each_card_rtds(card, be) {
1324
1325                         if (!be->dai_link->no_pcm)
1326                                 continue;
1327
1328                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1329                                 be->cpu_dai->playback_widget ?
1330                                 be->cpu_dai->playback_widget->name : "(not set)");
1331
1332                         if (be->cpu_dai->playback_widget == widget)
1333                                 return be;
1334
1335                         for_each_rtd_codec_dai(be, i, dai) {
1336                                 if (dai->playback_widget == widget)
1337                                         return be;
1338                         }
1339                 }
1340         } else {
1341
1342                 for_each_card_rtds(card, be) {
1343
1344                         if (!be->dai_link->no_pcm)
1345                                 continue;
1346
1347                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1348                                 be->cpu_dai->capture_widget ?
1349                                 be->cpu_dai->capture_widget->name : "(not set)");
1350
1351                         if (be->cpu_dai->capture_widget == widget)
1352                                 return be;
1353
1354                         for_each_rtd_codec_dai(be, i, dai) {
1355                                 if (dai->capture_widget == widget)
1356                                         return be;
1357                         }
1358                 }
1359         }
1360
1361         /* dai link name and stream name set correctly ? */
1362         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1363                 stream ? "capture" : "playback", widget->name);
1364         return NULL;
1365 }
1366
1367 static inline struct snd_soc_dapm_widget *
1368         dai_get_widget(struct snd_soc_dai *dai, int stream)
1369 {
1370         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1371                 return dai->playback_widget;
1372         else
1373                 return dai->capture_widget;
1374 }
1375
1376 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1377                 struct snd_soc_dapm_widget *widget)
1378 {
1379         int i;
1380
1381         for (i = 0; i < list->num_widgets; i++) {
1382                 if (widget == list->widgets[i])
1383                         return 1;
1384         }
1385
1386         return 0;
1387 }
1388
1389 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1390                 enum snd_soc_dapm_direction dir)
1391 {
1392         struct snd_soc_card *card = widget->dapm->card;
1393         struct snd_soc_pcm_runtime *rtd;
1394         struct snd_soc_dai *dai;
1395         int i;
1396
1397         if (dir == SND_SOC_DAPM_DIR_OUT) {
1398                 for_each_card_rtds(card, rtd) {
1399                         if (!rtd->dai_link->no_pcm)
1400                                 continue;
1401
1402                         if (rtd->cpu_dai->playback_widget == widget)
1403                                 return true;
1404
1405                         for_each_rtd_codec_dai(rtd, i, dai) {
1406                                 if (dai->playback_widget == widget)
1407                                         return true;
1408                         }
1409                 }
1410         } else { /* SND_SOC_DAPM_DIR_IN */
1411                 for_each_card_rtds(card, rtd) {
1412                         if (!rtd->dai_link->no_pcm)
1413                                 continue;
1414
1415                         if (rtd->cpu_dai->capture_widget == widget)
1416                                 return true;
1417
1418                         for_each_rtd_codec_dai(rtd, i, dai) {
1419                                 if (dai->capture_widget == widget)
1420                                         return true;
1421                         }
1422                 }
1423         }
1424
1425         return false;
1426 }
1427
1428 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1429         int stream, struct snd_soc_dapm_widget_list **list)
1430 {
1431         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1432         int paths;
1433
1434         /* get number of valid DAI paths and their widgets */
1435         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1436                         dpcm_end_walk_at_be);
1437
1438         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1439                         stream ? "capture" : "playback");
1440
1441         return paths;
1442 }
1443
1444 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1445         struct snd_soc_dapm_widget_list **list_)
1446 {
1447         struct snd_soc_dpcm *dpcm;
1448         struct snd_soc_dapm_widget_list *list = *list_;
1449         struct snd_soc_dapm_widget *widget;
1450         struct snd_soc_dai *dai;
1451         int prune = 0;
1452
1453         /* Destroy any old FE <--> BE connections */
1454         for_each_dpcm_be(fe, stream, dpcm) {
1455                 unsigned int i;
1456
1457                 /* is there a valid CPU DAI widget for this BE */
1458                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1459
1460                 /* prune the BE if it's no longer in our active list */
1461                 if (widget && widget_in_list(list, widget))
1462                         continue;
1463
1464                 /* is there a valid CODEC DAI widget for this BE */
1465                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1466                         widget = dai_get_widget(dai, stream);
1467
1468                         /* prune the BE if it's no longer in our active list */
1469                         if (widget && widget_in_list(list, widget))
1470                                 continue;
1471                 }
1472
1473                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1474                         stream ? "capture" : "playback",
1475                         dpcm->be->dai_link->name, fe->dai_link->name);
1476                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1477                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1478                 prune++;
1479         }
1480
1481         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1482         return prune;
1483 }
1484
1485 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1486         struct snd_soc_dapm_widget_list **list_)
1487 {
1488         struct snd_soc_card *card = fe->card;
1489         struct snd_soc_dapm_widget_list *list = *list_;
1490         struct snd_soc_pcm_runtime *be;
1491         int i, new = 0, err;
1492
1493         /* Create any new FE <--> BE connections */
1494         for (i = 0; i < list->num_widgets; i++) {
1495
1496                 switch (list->widgets[i]->id) {
1497                 case snd_soc_dapm_dai_in:
1498                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1499                                 continue;
1500                         break;
1501                 case snd_soc_dapm_dai_out:
1502                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1503                                 continue;
1504                         break;
1505                 default:
1506                         continue;
1507                 }
1508
1509                 /* is there a valid BE rtd for this widget */
1510                 be = dpcm_get_be(card, list->widgets[i], stream);
1511                 if (!be) {
1512                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1513                                         list->widgets[i]->name);
1514                         continue;
1515                 }
1516
1517                 /* make sure BE is a real BE */
1518                 if (!be->dai_link->no_pcm)
1519                         continue;
1520
1521                 /* don't connect if FE is not running */
1522                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1523                         continue;
1524
1525                 /* newly connected FE and BE */
1526                 err = dpcm_be_connect(fe, be, stream);
1527                 if (err < 0) {
1528                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1529                                 list->widgets[i]->name);
1530                         break;
1531                 } else if (err == 0) /* already connected */
1532                         continue;
1533
1534                 /* new */
1535                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1536                 new++;
1537         }
1538
1539         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1540         return new;
1541 }
1542
1543 /*
1544  * Find the corresponding BE DAIs that source or sink audio to this
1545  * FE substream.
1546  */
1547 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1548         int stream, struct snd_soc_dapm_widget_list **list, int new)
1549 {
1550         if (new)
1551                 return dpcm_add_paths(fe, stream, list);
1552         else
1553                 return dpcm_prune_paths(fe, stream, list);
1554 }
1555
1556 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1557 {
1558         struct snd_soc_dpcm *dpcm;
1559         unsigned long flags;
1560
1561         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1562         for_each_dpcm_be(fe, stream, dpcm)
1563                 dpcm->be->dpcm[stream].runtime_update =
1564                                                 SND_SOC_DPCM_UPDATE_NO;
1565         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1566 }
1567
1568 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1569         int stream)
1570 {
1571         struct snd_soc_dpcm *dpcm;
1572
1573         /* disable any enabled and non active backends */
1574         for_each_dpcm_be(fe, stream, dpcm) {
1575
1576                 struct snd_soc_pcm_runtime *be = dpcm->be;
1577                 struct snd_pcm_substream *be_substream =
1578                         snd_soc_dpcm_get_substream(be, stream);
1579
1580                 if (be->dpcm[stream].users == 0)
1581                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1582                                 stream ? "capture" : "playback",
1583                                 be->dpcm[stream].state);
1584
1585                 if (--be->dpcm[stream].users != 0)
1586                         continue;
1587
1588                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1589                         continue;
1590
1591                 soc_pcm_close(be_substream);
1592                 be_substream->runtime = NULL;
1593                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1594         }
1595 }
1596
1597 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1598 {
1599         struct snd_soc_dpcm *dpcm;
1600         int err, count = 0;
1601
1602         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1603         for_each_dpcm_be(fe, stream, dpcm) {
1604
1605                 struct snd_soc_pcm_runtime *be = dpcm->be;
1606                 struct snd_pcm_substream *be_substream =
1607                         snd_soc_dpcm_get_substream(be, stream);
1608
1609                 if (!be_substream) {
1610                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1611                                 stream ? "capture" : "playback");
1612                         continue;
1613                 }
1614
1615                 /* is this op for this BE ? */
1616                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1617                         continue;
1618
1619                 /* first time the dpcm is open ? */
1620                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1621                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1622                                 stream ? "capture" : "playback",
1623                                 be->dpcm[stream].state);
1624
1625                 if (be->dpcm[stream].users++ != 0)
1626                         continue;
1627
1628                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1629                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1630                         continue;
1631
1632                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1633                         stream ? "capture" : "playback", be->dai_link->name);
1634
1635                 be_substream->runtime = be->dpcm[stream].runtime;
1636                 err = soc_pcm_open(be_substream);
1637                 if (err < 0) {
1638                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1639                         be->dpcm[stream].users--;
1640                         if (be->dpcm[stream].users < 0)
1641                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1642                                         stream ? "capture" : "playback",
1643                                         be->dpcm[stream].state);
1644
1645                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1646                         goto unwind;
1647                 }
1648
1649                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1650                 count++;
1651         }
1652
1653         return count;
1654
1655 unwind:
1656         /* disable any enabled and non active backends */
1657         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1658                 struct snd_soc_pcm_runtime *be = dpcm->be;
1659                 struct snd_pcm_substream *be_substream =
1660                         snd_soc_dpcm_get_substream(be, stream);
1661
1662                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1663                         continue;
1664
1665                 if (be->dpcm[stream].users == 0)
1666                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1667                                 stream ? "capture" : "playback",
1668                                 be->dpcm[stream].state);
1669
1670                 if (--be->dpcm[stream].users != 0)
1671                         continue;
1672
1673                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1674                         continue;
1675
1676                 soc_pcm_close(be_substream);
1677                 be_substream->runtime = NULL;
1678                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1679         }
1680
1681         return err;
1682 }
1683
1684 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1685                                  struct snd_soc_pcm_stream *stream)
1686 {
1687         runtime->hw.rate_min = stream->rate_min;
1688         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1689         runtime->hw.channels_min = stream->channels_min;
1690         runtime->hw.channels_max = stream->channels_max;
1691         if (runtime->hw.formats)
1692                 runtime->hw.formats &= stream->formats;
1693         else
1694                 runtime->hw.formats = stream->formats;
1695         runtime->hw.rates = stream->rates;
1696 }
1697
1698 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1699                                       u64 *formats)
1700 {
1701         struct snd_soc_pcm_runtime *fe = substream->private_data;
1702         struct snd_soc_dpcm *dpcm;
1703         struct snd_soc_dai *dai;
1704         int stream = substream->stream;
1705
1706         if (!fe->dai_link->dpcm_merged_format)
1707                 return;
1708
1709         /*
1710          * It returns merged BE codec format
1711          * if FE want to use it (= dpcm_merged_format)
1712          */
1713
1714         for_each_dpcm_be(fe, stream, dpcm) {
1715                 struct snd_soc_pcm_runtime *be = dpcm->be;
1716                 struct snd_soc_dai_driver *codec_dai_drv;
1717                 struct snd_soc_pcm_stream *codec_stream;
1718                 int i;
1719
1720                 for_each_rtd_codec_dai(be, i, dai) {
1721                         /*
1722                          * Skip CODECs which don't support the current stream
1723                          * type. See soc_pcm_init_runtime_hw() for more details
1724                          */
1725                         if (!snd_soc_dai_stream_valid(dai, stream))
1726                                 continue;
1727
1728                         codec_dai_drv = dai->driver;
1729                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1730                                 codec_stream = &codec_dai_drv->playback;
1731                         else
1732                                 codec_stream = &codec_dai_drv->capture;
1733
1734                         *formats &= codec_stream->formats;
1735                 }
1736         }
1737 }
1738
1739 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1740                                     unsigned int *channels_min,
1741                                     unsigned int *channels_max)
1742 {
1743         struct snd_soc_pcm_runtime *fe = substream->private_data;
1744         struct snd_soc_dpcm *dpcm;
1745         int stream = substream->stream;
1746
1747         if (!fe->dai_link->dpcm_merged_chan)
1748                 return;
1749
1750         /*
1751          * It returns merged BE codec channel;
1752          * if FE want to use it (= dpcm_merged_chan)
1753          */
1754
1755         for_each_dpcm_be(fe, stream, dpcm) {
1756                 struct snd_soc_pcm_runtime *be = dpcm->be;
1757                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1758                 struct snd_soc_dai_driver *codec_dai_drv;
1759                 struct snd_soc_pcm_stream *codec_stream;
1760                 struct snd_soc_pcm_stream *cpu_stream;
1761
1762                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1763                         cpu_stream = &cpu_dai_drv->playback;
1764                 else
1765                         cpu_stream = &cpu_dai_drv->capture;
1766
1767                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1768                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1769
1770                 /*
1771                  * chan min/max cannot be enforced if there are multiple CODEC
1772                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1773                  */
1774                 if (be->num_codecs == 1) {
1775                         codec_dai_drv = be->codec_dais[0]->driver;
1776
1777                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1778                                 codec_stream = &codec_dai_drv->playback;
1779                         else
1780                                 codec_stream = &codec_dai_drv->capture;
1781
1782                         *channels_min = max(*channels_min,
1783                                             codec_stream->channels_min);
1784                         *channels_max = min(*channels_max,
1785                                             codec_stream->channels_max);
1786                 }
1787         }
1788 }
1789
1790 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1791                                     unsigned int *rates,
1792                                     unsigned int *rate_min,
1793                                     unsigned int *rate_max)
1794 {
1795         struct snd_soc_pcm_runtime *fe = substream->private_data;
1796         struct snd_soc_dpcm *dpcm;
1797         int stream = substream->stream;
1798
1799         if (!fe->dai_link->dpcm_merged_rate)
1800                 return;
1801
1802         /*
1803          * It returns merged BE codec channel;
1804          * if FE want to use it (= dpcm_merged_chan)
1805          */
1806
1807         for_each_dpcm_be(fe, stream, dpcm) {
1808                 struct snd_soc_pcm_runtime *be = dpcm->be;
1809                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1810                 struct snd_soc_dai_driver *codec_dai_drv;
1811                 struct snd_soc_pcm_stream *codec_stream;
1812                 struct snd_soc_pcm_stream *cpu_stream;
1813                 struct snd_soc_dai *dai;
1814                 int i;
1815
1816                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1817                         cpu_stream = &cpu_dai_drv->playback;
1818                 else
1819                         cpu_stream = &cpu_dai_drv->capture;
1820
1821                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1822                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1823                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1824
1825                 for_each_rtd_codec_dai(be, i, dai) {
1826                         /*
1827                          * Skip CODECs which don't support the current stream
1828                          * type. See soc_pcm_init_runtime_hw() for more details
1829                          */
1830                         if (!snd_soc_dai_stream_valid(dai, stream))
1831                                 continue;
1832
1833                         codec_dai_drv = dai->driver;
1834                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1835                                 codec_stream = &codec_dai_drv->playback;
1836                         else
1837                                 codec_stream = &codec_dai_drv->capture;
1838
1839                         *rate_min = max(*rate_min, codec_stream->rate_min);
1840                         *rate_max = min_not_zero(*rate_max,
1841                                                  codec_stream->rate_max);
1842                         *rates = snd_pcm_rate_mask_intersect(*rates,
1843                                                 codec_stream->rates);
1844                 }
1845         }
1846 }
1847
1848 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1849 {
1850         struct snd_pcm_runtime *runtime = substream->runtime;
1851         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1852         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1853         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1854
1855         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1856                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1857         else
1858                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1859
1860         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1861         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1862                                 &runtime->hw.channels_max);
1863         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1864                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1865 }
1866
1867 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1868
1869 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1870  * for avoiding the race with trigger callback.
1871  * If the state is unset and a trigger is pending while the previous operation,
1872  * process the pending trigger action here.
1873  */
1874 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1875                                      int stream, enum snd_soc_dpcm_update state)
1876 {
1877         struct snd_pcm_substream *substream =
1878                 snd_soc_dpcm_get_substream(fe, stream);
1879
1880         snd_pcm_stream_lock_irq(substream);
1881         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1882                 dpcm_fe_dai_do_trigger(substream,
1883                                        fe->dpcm[stream].trigger_pending - 1);
1884                 fe->dpcm[stream].trigger_pending = 0;
1885         }
1886         fe->dpcm[stream].runtime_update = state;
1887         snd_pcm_stream_unlock_irq(substream);
1888 }
1889
1890 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1891                                int stream)
1892 {
1893         struct snd_soc_dpcm *dpcm;
1894         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1895         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1896         int err;
1897
1898         /* apply symmetry for FE */
1899         if (soc_pcm_has_symmetry(fe_substream))
1900                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1901
1902         /* Symmetry only applies if we've got an active stream. */
1903         if (fe_cpu_dai->active) {
1904                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1905                 if (err < 0)
1906                         return err;
1907         }
1908
1909         /* apply symmetry for BE */
1910         for_each_dpcm_be(fe, stream, dpcm) {
1911                 struct snd_soc_pcm_runtime *be = dpcm->be;
1912                 struct snd_pcm_substream *be_substream =
1913                         snd_soc_dpcm_get_substream(be, stream);
1914                 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1915                 struct snd_soc_dai *codec_dai;
1916                 int i;
1917
1918                 if (rtd->dai_link->be_hw_params_fixup)
1919                         continue;
1920
1921                 if (soc_pcm_has_symmetry(be_substream))
1922                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1923
1924                 /* Symmetry only applies if we've got an active stream. */
1925                 if (rtd->cpu_dai->active) {
1926                         err = soc_pcm_apply_symmetry(fe_substream,
1927                                                      rtd->cpu_dai);
1928                         if (err < 0)
1929                                 return err;
1930                 }
1931
1932                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1933                         if (codec_dai->active) {
1934                                 err = soc_pcm_apply_symmetry(fe_substream,
1935                                                              codec_dai);
1936                                 if (err < 0)
1937                                         return err;
1938                         }
1939                 }
1940         }
1941
1942         return 0;
1943 }
1944
1945 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1946 {
1947         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1948         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1949         int stream = fe_substream->stream, ret = 0;
1950
1951         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1952
1953         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1954         if (ret < 0) {
1955                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1956                 goto be_err;
1957         }
1958
1959         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1960
1961         /* start the DAI frontend */
1962         ret = soc_pcm_open(fe_substream);
1963         if (ret < 0) {
1964                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1965                 goto unwind;
1966         }
1967
1968         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1969
1970         dpcm_set_fe_runtime(fe_substream);
1971         snd_pcm_limit_hw_rates(runtime);
1972
1973         ret = dpcm_apply_symmetry(fe_substream, stream);
1974         if (ret < 0) {
1975                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1976                         ret);
1977                 goto unwind;
1978         }
1979
1980         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1981         return 0;
1982
1983 unwind:
1984         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1985 be_err:
1986         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1987         return ret;
1988 }
1989
1990 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1991 {
1992         struct snd_soc_dpcm *dpcm;
1993
1994         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1995         for_each_dpcm_be(fe, stream, dpcm) {
1996
1997                 struct snd_soc_pcm_runtime *be = dpcm->be;
1998                 struct snd_pcm_substream *be_substream =
1999                         snd_soc_dpcm_get_substream(be, stream);
2000
2001                 /* is this op for this BE ? */
2002                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2003                         continue;
2004
2005                 if (be->dpcm[stream].users == 0)
2006                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
2007                                 stream ? "capture" : "playback",
2008                                 be->dpcm[stream].state);
2009
2010                 if (--be->dpcm[stream].users != 0)
2011                         continue;
2012
2013                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2014                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2015                         soc_pcm_hw_free(be_substream);
2016                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2017                 }
2018
2019                 dev_dbg(be->dev, "ASoC: close BE %s\n",
2020                         be->dai_link->name);
2021
2022                 soc_pcm_close(be_substream);
2023                 be_substream->runtime = NULL;
2024
2025                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2026         }
2027         return 0;
2028 }
2029
2030 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2031 {
2032         struct snd_soc_pcm_runtime *fe = substream->private_data;
2033         int stream = substream->stream;
2034
2035         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2036
2037         /* shutdown the BEs */
2038         dpcm_be_dai_shutdown(fe, substream->stream);
2039
2040         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2041
2042         /* now shutdown the frontend */
2043         soc_pcm_close(substream);
2044
2045         /* run the stream event for each BE */
2046         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2047
2048         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2049         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2050         return 0;
2051 }
2052
2053 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2054 {
2055         struct snd_soc_dpcm *dpcm;
2056
2057         /* only hw_params backends that are either sinks or sources
2058          * to this frontend DAI */
2059         for_each_dpcm_be(fe, stream, dpcm) {
2060
2061                 struct snd_soc_pcm_runtime *be = dpcm->be;
2062                 struct snd_pcm_substream *be_substream =
2063                         snd_soc_dpcm_get_substream(be, stream);
2064
2065                 /* is this op for this BE ? */
2066                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2067                         continue;
2068
2069                 /* only free hw when no longer used - check all FEs */
2070                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2071                                 continue;
2072
2073                 /* do not free hw if this BE is used by other FE */
2074                 if (be->dpcm[stream].users > 1)
2075                         continue;
2076
2077                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2078                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2079                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2080                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2081                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2082                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2083                         continue;
2084
2085                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2086                         be->dai_link->name);
2087
2088                 soc_pcm_hw_free(be_substream);
2089
2090                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2091         }
2092
2093         return 0;
2094 }
2095
2096 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2097 {
2098         struct snd_soc_pcm_runtime *fe = substream->private_data;
2099         int err, stream = substream->stream;
2100
2101         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2102         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2103
2104         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2105
2106         /* call hw_free on the frontend */
2107         err = soc_pcm_hw_free(substream);
2108         if (err < 0)
2109                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2110                         fe->dai_link->name);
2111
2112         /* only hw_params backends that are either sinks or sources
2113          * to this frontend DAI */
2114         err = dpcm_be_dai_hw_free(fe, stream);
2115
2116         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2117         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2118
2119         mutex_unlock(&fe->card->mutex);
2120         return 0;
2121 }
2122
2123 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2124 {
2125         struct snd_soc_dpcm *dpcm;
2126         int ret;
2127
2128         for_each_dpcm_be(fe, stream, dpcm) {
2129
2130                 struct snd_soc_pcm_runtime *be = dpcm->be;
2131                 struct snd_pcm_substream *be_substream =
2132                         snd_soc_dpcm_get_substream(be, stream);
2133
2134                 /* is this op for this BE ? */
2135                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2136                         continue;
2137
2138                 /* copy params for each dpcm */
2139                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2140                                 sizeof(struct snd_pcm_hw_params));
2141
2142                 /* perform any hw_params fixups */
2143                 if (be->dai_link->be_hw_params_fixup) {
2144                         ret = be->dai_link->be_hw_params_fixup(be,
2145                                         &dpcm->hw_params);
2146                         if (ret < 0) {
2147                                 dev_err(be->dev,
2148                                         "ASoC: hw_params BE fixup failed %d\n",
2149                                         ret);
2150                                 goto unwind;
2151                         }
2152                 }
2153
2154                 /* only allow hw_params() if no connected FEs are running */
2155                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2156                         continue;
2157
2158                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2159                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2160                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2161                         continue;
2162
2163                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2164                         be->dai_link->name);
2165
2166                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2167                 if (ret < 0) {
2168                         dev_err(dpcm->be->dev,
2169                                 "ASoC: hw_params BE failed %d\n", ret);
2170                         goto unwind;
2171                 }
2172
2173                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2174         }
2175         return 0;
2176
2177 unwind:
2178         /* disable any enabled and non active backends */
2179         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2180                 struct snd_soc_pcm_runtime *be = dpcm->be;
2181                 struct snd_pcm_substream *be_substream =
2182                         snd_soc_dpcm_get_substream(be, stream);
2183
2184                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2185                         continue;
2186
2187                 /* only allow hw_free() if no connected FEs are running */
2188                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2189                         continue;
2190
2191                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2192                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2193                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2194                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2195                         continue;
2196
2197                 soc_pcm_hw_free(be_substream);
2198         }
2199
2200         return ret;
2201 }
2202
2203 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2204                                  struct snd_pcm_hw_params *params)
2205 {
2206         struct snd_soc_pcm_runtime *fe = substream->private_data;
2207         int ret, stream = substream->stream;
2208
2209         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2210         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2211
2212         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2213                         sizeof(struct snd_pcm_hw_params));
2214         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2215         if (ret < 0) {
2216                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2217                 goto out;
2218         }
2219
2220         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2221                         fe->dai_link->name, params_rate(params),
2222                         params_channels(params), params_format(params));
2223
2224         /* call hw_params on the frontend */
2225         ret = soc_pcm_hw_params(substream, params);
2226         if (ret < 0) {
2227                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2228                 dpcm_be_dai_hw_free(fe, stream);
2229          } else
2230                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2231
2232 out:
2233         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2234         mutex_unlock(&fe->card->mutex);
2235         return ret;
2236 }
2237
2238 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2239                 struct snd_pcm_substream *substream, int cmd)
2240 {
2241         int ret;
2242
2243         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2244                         dpcm->be->dai_link->name, cmd);
2245
2246         ret = soc_pcm_trigger(substream, cmd);
2247         if (ret < 0)
2248                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2249
2250         return ret;
2251 }
2252
2253 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2254                                int cmd)
2255 {
2256         struct snd_soc_dpcm *dpcm;
2257         int ret = 0;
2258
2259         for_each_dpcm_be(fe, stream, dpcm) {
2260
2261                 struct snd_soc_pcm_runtime *be = dpcm->be;
2262                 struct snd_pcm_substream *be_substream =
2263                         snd_soc_dpcm_get_substream(be, stream);
2264
2265                 /* is this op for this BE ? */
2266                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2267                         continue;
2268
2269                 switch (cmd) {
2270                 case SNDRV_PCM_TRIGGER_START:
2271                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2272                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2273                                 continue;
2274
2275                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2276                         if (ret)
2277                                 return ret;
2278
2279                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2280                         break;
2281                 case SNDRV_PCM_TRIGGER_RESUME:
2282                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2283                                 continue;
2284
2285                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2286                         if (ret)
2287                                 return ret;
2288
2289                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2290                         break;
2291                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2292                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2293                                 continue;
2294
2295                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2296                         if (ret)
2297                                 return ret;
2298
2299                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2300                         break;
2301                 case SNDRV_PCM_TRIGGER_STOP:
2302                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2303                                 continue;
2304
2305                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2306                                 continue;
2307
2308                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2309                         if (ret)
2310                                 return ret;
2311
2312                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2313                         break;
2314                 case SNDRV_PCM_TRIGGER_SUSPEND:
2315                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2316                                 continue;
2317
2318                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2319                                 continue;
2320
2321                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2322                         if (ret)
2323                                 return ret;
2324
2325                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2326                         break;
2327                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2328                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2329                                 continue;
2330
2331                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2332                                 continue;
2333
2334                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2335                         if (ret)
2336                                 return ret;
2337
2338                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2339                         break;
2340                 }
2341         }
2342
2343         return ret;
2344 }
2345 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2346
2347 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2348 {
2349         struct snd_soc_pcm_runtime *fe = substream->private_data;
2350         int stream = substream->stream, ret;
2351         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2352
2353         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2354
2355         switch (trigger) {
2356         case SND_SOC_DPCM_TRIGGER_PRE:
2357                 /* call trigger on the frontend before the backend. */
2358
2359                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2360                                 fe->dai_link->name, cmd);
2361
2362                 ret = soc_pcm_trigger(substream, cmd);
2363                 if (ret < 0) {
2364                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2365                         goto out;
2366                 }
2367
2368                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2369                 break;
2370         case SND_SOC_DPCM_TRIGGER_POST:
2371                 /* call trigger on the frontend after the backend. */
2372
2373                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2374                 if (ret < 0) {
2375                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2376                         goto out;
2377                 }
2378
2379                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2380                                 fe->dai_link->name, cmd);
2381
2382                 ret = soc_pcm_trigger(substream, cmd);
2383                 break;
2384         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2385                 /* bespoke trigger() - handles both FE and BEs */
2386
2387                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2388                                 fe->dai_link->name, cmd);
2389
2390                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2391                 if (ret < 0) {
2392                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2393                         goto out;
2394                 }
2395                 break;
2396         default:
2397                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2398                                 fe->dai_link->name);
2399                 ret = -EINVAL;
2400                 goto out;
2401         }
2402
2403         switch (cmd) {
2404         case SNDRV_PCM_TRIGGER_START:
2405         case SNDRV_PCM_TRIGGER_RESUME:
2406         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2407                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2408                 break;
2409         case SNDRV_PCM_TRIGGER_STOP:
2410         case SNDRV_PCM_TRIGGER_SUSPEND:
2411                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2412                 break;
2413         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2414                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2415                 break;
2416         }
2417
2418 out:
2419         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2420         return ret;
2421 }
2422
2423 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2424 {
2425         struct snd_soc_pcm_runtime *fe = substream->private_data;
2426         int stream = substream->stream;
2427
2428         /* if FE's runtime_update is already set, we're in race;
2429          * process this trigger later at exit
2430          */
2431         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2432                 fe->dpcm[stream].trigger_pending = cmd + 1;
2433                 return 0; /* delayed, assuming it's successful */
2434         }
2435
2436         /* we're alone, let's trigger */
2437         return dpcm_fe_dai_do_trigger(substream, cmd);
2438 }
2439
2440 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2441 {
2442         struct snd_soc_dpcm *dpcm;
2443         int ret = 0;
2444
2445         for_each_dpcm_be(fe, stream, dpcm) {
2446
2447                 struct snd_soc_pcm_runtime *be = dpcm->be;
2448                 struct snd_pcm_substream *be_substream =
2449                         snd_soc_dpcm_get_substream(be, stream);
2450
2451                 /* is this op for this BE ? */
2452                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2453                         continue;
2454
2455                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2456                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2457                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2458                         continue;
2459
2460                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2461                         be->dai_link->name);
2462
2463                 ret = soc_pcm_prepare(be_substream);
2464                 if (ret < 0) {
2465                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2466                                 ret);
2467                         break;
2468                 }
2469
2470                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2471         }
2472         return ret;
2473 }
2474
2475 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2476 {
2477         struct snd_soc_pcm_runtime *fe = substream->private_data;
2478         int stream = substream->stream, ret = 0;
2479
2480         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2481
2482         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2483
2484         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2485
2486         /* there is no point preparing this FE if there are no BEs */
2487         if (list_empty(&fe->dpcm[stream].be_clients)) {
2488                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2489                                 fe->dai_link->name);
2490                 ret = -EINVAL;
2491                 goto out;
2492         }
2493
2494         ret = dpcm_be_dai_prepare(fe, substream->stream);
2495         if (ret < 0)
2496                 goto out;
2497
2498         /* call prepare on the frontend */
2499         ret = soc_pcm_prepare(substream);
2500         if (ret < 0) {
2501                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2502                         fe->dai_link->name);
2503                 goto out;
2504         }
2505
2506         /* run the stream event for each BE */
2507         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2508         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2509
2510 out:
2511         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2512         mutex_unlock(&fe->card->mutex);
2513
2514         return ret;
2515 }
2516
2517 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2518                      unsigned int cmd, void *arg)
2519 {
2520         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2521         struct snd_soc_component *component;
2522         struct snd_soc_rtdcom_list *rtdcom;
2523
2524         for_each_rtdcom(rtd, rtdcom) {
2525                 component = rtdcom->component;
2526
2527                 if (!component->driver->ops ||
2528                     !component->driver->ops->ioctl)
2529                         continue;
2530
2531                 /* FIXME: use 1st ioctl */
2532                 return component->driver->ops->ioctl(substream, cmd, arg);
2533         }
2534
2535         return snd_pcm_lib_ioctl(substream, cmd, arg);
2536 }
2537
2538 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2539 {
2540         struct snd_pcm_substream *substream =
2541                 snd_soc_dpcm_get_substream(fe, stream);
2542         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2543         int err;
2544
2545         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2546                         stream ? "capture" : "playback", fe->dai_link->name);
2547
2548         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2549                 /* call bespoke trigger - FE takes care of all BE triggers */
2550                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2551                                 fe->dai_link->name);
2552
2553                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2554                 if (err < 0)
2555                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2556         } else {
2557                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2558                         fe->dai_link->name);
2559
2560                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2561                 if (err < 0)
2562                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2563         }
2564
2565         err = dpcm_be_dai_hw_free(fe, stream);
2566         if (err < 0)
2567                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2568
2569         err = dpcm_be_dai_shutdown(fe, stream);
2570         if (err < 0)
2571                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2572
2573         /* run the stream event for each BE */
2574         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2575
2576         return 0;
2577 }
2578
2579 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2580 {
2581         struct snd_pcm_substream *substream =
2582                 snd_soc_dpcm_get_substream(fe, stream);
2583         struct snd_soc_dpcm *dpcm;
2584         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2585         int ret;
2586         unsigned long flags;
2587
2588         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2589                         stream ? "capture" : "playback", fe->dai_link->name);
2590
2591         /* Only start the BE if the FE is ready */
2592         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2593                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2594                 return -EINVAL;
2595
2596         /* startup must always be called for new BEs */
2597         ret = dpcm_be_dai_startup(fe, stream);
2598         if (ret < 0)
2599                 goto disconnect;
2600
2601         /* keep going if FE state is > open */
2602         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2603                 return 0;
2604
2605         ret = dpcm_be_dai_hw_params(fe, stream);
2606         if (ret < 0)
2607                 goto close;
2608
2609         /* keep going if FE state is > hw_params */
2610         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2611                 return 0;
2612
2613
2614         ret = dpcm_be_dai_prepare(fe, stream);
2615         if (ret < 0)
2616                 goto hw_free;
2617
2618         /* run the stream event for each BE */
2619         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2620
2621         /* keep going if FE state is > prepare */
2622         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2623                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2624                 return 0;
2625
2626         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2627                 /* call trigger on the frontend - FE takes care of all BE triggers */
2628                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2629                                 fe->dai_link->name);
2630
2631                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2632                 if (ret < 0) {
2633                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2634                         goto hw_free;
2635                 }
2636         } else {
2637                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2638                         fe->dai_link->name);
2639
2640                 ret = dpcm_be_dai_trigger(fe, stream,
2641                                         SNDRV_PCM_TRIGGER_START);
2642                 if (ret < 0) {
2643                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2644                         goto hw_free;
2645                 }
2646         }
2647
2648         return 0;
2649
2650 hw_free:
2651         dpcm_be_dai_hw_free(fe, stream);
2652 close:
2653         dpcm_be_dai_shutdown(fe, stream);
2654 disconnect:
2655         /* disconnect any non started BEs */
2656         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2657         for_each_dpcm_be(fe, stream, dpcm) {
2658                 struct snd_soc_pcm_runtime *be = dpcm->be;
2659                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2660                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2661         }
2662         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2663
2664         return ret;
2665 }
2666
2667 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2668 {
2669         int ret;
2670
2671         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2672         ret = dpcm_run_update_startup(fe, stream);
2673         if (ret < 0)
2674                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2675         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2676
2677         return ret;
2678 }
2679
2680 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2681 {
2682         int ret;
2683
2684         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2685         ret = dpcm_run_update_shutdown(fe, stream);
2686         if (ret < 0)
2687                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2688         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2689
2690         return ret;
2691 }
2692
2693 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2694 {
2695         struct snd_soc_dapm_widget_list *list;
2696         int count, paths;
2697
2698         if (!fe->dai_link->dynamic)
2699                 return 0;
2700
2701         /* only check active links */
2702         if (!fe->cpu_dai->active)
2703                 return 0;
2704
2705         /* DAPM sync will call this to update DSP paths */
2706         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2707                 new ? "new" : "old", fe->dai_link->name);
2708
2709         /* skip if FE doesn't have playback capability */
2710         if (!fe->cpu_dai->driver->playback.channels_min ||
2711             !fe->codec_dai->driver->playback.channels_min)
2712                 goto capture;
2713
2714         /* skip if FE isn't currently playing */
2715         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2716                 goto capture;
2717
2718         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2719         if (paths < 0) {
2720                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2721                          fe->dai_link->name,  "playback");
2722                 return paths;
2723         }
2724
2725         /* update any playback paths */
2726         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2727         if (count) {
2728                 if (new)
2729                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2730                 else
2731                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2732
2733                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2734                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2735         }
2736
2737         dpcm_path_put(&list);
2738
2739 capture:
2740         /* skip if FE doesn't have capture capability */
2741         if (!fe->cpu_dai->driver->capture.channels_min ||
2742             !fe->codec_dai->driver->capture.channels_min)
2743                 return 0;
2744
2745         /* skip if FE isn't currently capturing */
2746         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2747                 return 0;
2748
2749         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2750         if (paths < 0) {
2751                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2752                          fe->dai_link->name,  "capture");
2753                 return paths;
2754         }
2755
2756         /* update any old capture paths */
2757         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2758         if (count) {
2759                 if (new)
2760                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2761                 else
2762                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2763
2764                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2765                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2766         }
2767
2768         dpcm_path_put(&list);
2769
2770         return 0;
2771 }
2772
2773 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2774  * any DAI links.
2775  */
2776 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2777 {
2778         struct snd_soc_pcm_runtime *fe;
2779         int ret = 0;
2780
2781         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2782         /* shutdown all old paths first */
2783         for_each_card_rtds(card, fe) {
2784                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2785                 if (ret)
2786                         goto out;
2787         }
2788
2789         /* bring new paths up */
2790         for_each_card_rtds(card, fe) {
2791                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2792                 if (ret)
2793                         goto out;
2794         }
2795
2796 out:
2797         mutex_unlock(&card->mutex);
2798         return ret;
2799 }
2800 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2801 {
2802         struct snd_soc_dpcm *dpcm;
2803         struct snd_soc_dai *dai;
2804
2805         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2806
2807                 struct snd_soc_pcm_runtime *be = dpcm->be;
2808                 int i;
2809
2810                 if (be->dai_link->ignore_suspend)
2811                         continue;
2812
2813                 for_each_rtd_codec_dai(be, i, dai) {
2814                         struct snd_soc_dai_driver *drv = dai->driver;
2815
2816                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2817                                          be->dai_link->name);
2818
2819                         if (drv->ops && drv->ops->digital_mute &&
2820                                                         dai->playback_active)
2821                                 drv->ops->digital_mute(dai, mute);
2822                 }
2823         }
2824
2825         return 0;
2826 }
2827
2828 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2829 {
2830         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2831         struct snd_soc_dpcm *dpcm;
2832         struct snd_soc_dapm_widget_list *list;
2833         int ret;
2834         int stream = fe_substream->stream;
2835
2836         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2837         fe->dpcm[stream].runtime = fe_substream->runtime;
2838
2839         ret = dpcm_path_get(fe, stream, &list);
2840         if (ret < 0) {
2841                 mutex_unlock(&fe->card->mutex);
2842                 return ret;
2843         } else if (ret == 0) {
2844                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2845                         fe->dai_link->name, stream ? "capture" : "playback");
2846         }
2847
2848         /* calculate valid and active FE <-> BE dpcms */
2849         dpcm_process_paths(fe, stream, &list, 1);
2850
2851         ret = dpcm_fe_dai_startup(fe_substream);
2852         if (ret < 0) {
2853                 /* clean up all links */
2854                 for_each_dpcm_be(fe, stream, dpcm)
2855                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2856
2857                 dpcm_be_disconnect(fe, stream);
2858                 fe->dpcm[stream].runtime = NULL;
2859         }
2860
2861         dpcm_clear_pending_state(fe, stream);
2862         dpcm_path_put(&list);
2863         mutex_unlock(&fe->card->mutex);
2864         return ret;
2865 }
2866
2867 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2868 {
2869         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2870         struct snd_soc_dpcm *dpcm;
2871         int stream = fe_substream->stream, ret;
2872
2873         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2874         ret = dpcm_fe_dai_shutdown(fe_substream);
2875
2876         /* mark FE's links ready to prune */
2877         for_each_dpcm_be(fe, stream, dpcm)
2878                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2879
2880         dpcm_be_disconnect(fe, stream);
2881
2882         fe->dpcm[stream].runtime = NULL;
2883         mutex_unlock(&fe->card->mutex);
2884         return ret;
2885 }
2886
2887 static void soc_pcm_private_free(struct snd_pcm *pcm)
2888 {
2889         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2890         struct snd_soc_rtdcom_list *rtdcom;
2891         struct snd_soc_component *component;
2892
2893         /* need to sync the delayed work before releasing resources */
2894         flush_delayed_work(&rtd->delayed_work);
2895         for_each_rtdcom(rtd, rtdcom) {
2896                 component = rtdcom->component;
2897
2898                 if (component->driver->pcm_free)
2899                         component->driver->pcm_free(pcm);
2900         }
2901 }
2902
2903 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2904 {
2905         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2906         struct snd_soc_rtdcom_list *rtdcom;
2907         struct snd_soc_component *component;
2908
2909         for_each_rtdcom(rtd, rtdcom) {
2910                 component = rtdcom->component;
2911
2912                 if (!component->driver->ops ||
2913                     !component->driver->ops->ack)
2914                         continue;
2915
2916                 /* FIXME. it returns 1st ask now */
2917                 return component->driver->ops->ack(substream);
2918         }
2919
2920         return -EINVAL;
2921 }
2922
2923 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2924                                 unsigned long pos, void __user *buf,
2925                                 unsigned long bytes)
2926 {
2927         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2928         struct snd_soc_rtdcom_list *rtdcom;
2929         struct snd_soc_component *component;
2930
2931         for_each_rtdcom(rtd, rtdcom) {
2932                 component = rtdcom->component;
2933
2934                 if (!component->driver->ops ||
2935                     !component->driver->ops->copy_user)
2936                         continue;
2937
2938                 /* FIXME. it returns 1st copy now */
2939                 return component->driver->ops->copy_user(substream, channel,
2940                                                          pos, buf, bytes);
2941         }
2942
2943         return -EINVAL;
2944 }
2945
2946 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
2947                                   unsigned long pos, void *buf, unsigned long bytes)
2948 {
2949         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2950         struct snd_soc_rtdcom_list *rtdcom;
2951         struct snd_soc_component *component;
2952
2953         for_each_rtdcom(rtd, rtdcom) {
2954                 component = rtdcom->component;
2955
2956                 if (!component->driver->ops ||
2957                     !component->driver->ops->copy_kernel)
2958                         continue;
2959
2960                 /* FIXME. it returns 1st copy now */
2961                 return component->driver->ops->copy_kernel(substream, channel,
2962                                                            pos, buf, bytes);
2963         }
2964
2965         return -EINVAL;
2966 }
2967
2968 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
2969                                    unsigned long pos, unsigned long bytes)
2970 {
2971         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2972         struct snd_soc_rtdcom_list *rtdcom;
2973         struct snd_soc_component *component;
2974
2975         for_each_rtdcom(rtd, rtdcom) {
2976                 component = rtdcom->component;
2977
2978                 if (!component->driver->ops ||
2979                     !component->driver->ops->fill_silence)
2980                         continue;
2981
2982                 /* FIXME. it returns 1st silence now */
2983                 return component->driver->ops->fill_silence(substream, channel,
2984                                                             pos, bytes);
2985         }
2986
2987         return -EINVAL;
2988 }
2989
2990 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
2991                                     unsigned long offset)
2992 {
2993         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2994         struct snd_soc_rtdcom_list *rtdcom;
2995         struct snd_soc_component *component;
2996         struct page *page;
2997
2998         for_each_rtdcom(rtd, rtdcom) {
2999                 component = rtdcom->component;
3000
3001                 if (!component->driver->ops ||
3002                     !component->driver->ops->page)
3003                         continue;
3004
3005                 /* FIXME. it returns 1st page now */
3006                 page = component->driver->ops->page(substream, offset);
3007                 if (page)
3008                         return page;
3009         }
3010
3011         return NULL;
3012 }
3013
3014 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
3015                            struct vm_area_struct *vma)
3016 {
3017         struct snd_soc_pcm_runtime *rtd = substream->private_data;
3018         struct snd_soc_rtdcom_list *rtdcom;
3019         struct snd_soc_component *component;
3020
3021         for_each_rtdcom(rtd, rtdcom) {
3022                 component = rtdcom->component;
3023
3024                 if (!component->driver->ops ||
3025                     !component->driver->ops->mmap)
3026                         continue;
3027
3028                 /* FIXME. it returns 1st mmap now */
3029                 return component->driver->ops->mmap(substream, vma);
3030         }
3031
3032         return -EINVAL;
3033 }
3034
3035 /* create a new pcm */
3036 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
3037 {
3038         struct snd_soc_dai *codec_dai;
3039         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3040         struct snd_soc_component *component;
3041         struct snd_soc_rtdcom_list *rtdcom;
3042         struct snd_pcm *pcm;
3043         char new_name[64];
3044         int ret = 0, playback = 0, capture = 0;
3045         int i;
3046
3047         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
3048                 playback = rtd->dai_link->dpcm_playback;
3049                 capture = rtd->dai_link->dpcm_capture;
3050         } else {
3051                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
3052                         if (codec_dai->driver->playback.channels_min)
3053                                 playback = 1;
3054                         if (codec_dai->driver->capture.channels_min)
3055                                 capture = 1;
3056                 }
3057
3058                 capture = capture && cpu_dai->driver->capture.channels_min;
3059                 playback = playback && cpu_dai->driver->playback.channels_min;
3060         }
3061
3062         if (rtd->dai_link->playback_only) {
3063                 playback = 1;
3064                 capture = 0;
3065         }
3066
3067         if (rtd->dai_link->capture_only) {
3068                 playback = 0;
3069                 capture = 1;
3070         }
3071
3072         /* create the PCM */
3073         if (rtd->dai_link->no_pcm) {
3074                 snprintf(new_name, sizeof(new_name), "(%s)",
3075                         rtd->dai_link->stream_name);
3076
3077                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
3078                                 playback, capture, &pcm);
3079         } else {
3080                 if (rtd->dai_link->dynamic)
3081                         snprintf(new_name, sizeof(new_name), "%s (*)",
3082                                 rtd->dai_link->stream_name);
3083                 else
3084                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
3085                                 rtd->dai_link->stream_name,
3086                                 (rtd->num_codecs > 1) ?
3087                                 "multicodec" : rtd->codec_dai->name, num);
3088
3089                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
3090                         capture, &pcm);
3091         }
3092         if (ret < 0) {
3093                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
3094                         rtd->dai_link->name);
3095                 return ret;
3096         }
3097         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
3098
3099         /* DAPM dai link stream work */
3100         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
3101
3102         pcm->nonatomic = rtd->dai_link->nonatomic;
3103         rtd->pcm = pcm;
3104         pcm->private_data = rtd;
3105
3106         if (rtd->dai_link->no_pcm) {
3107                 if (playback)
3108                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
3109                 if (capture)
3110                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3111                 goto out;
3112         }
3113
3114         /* ASoC PCM operations */
3115         if (rtd->dai_link->dynamic) {
3116                 rtd->ops.open           = dpcm_fe_dai_open;
3117                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
3118                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
3119                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
3120                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
3121                 rtd->ops.close          = dpcm_fe_dai_close;
3122                 rtd->ops.pointer        = soc_pcm_pointer;
3123                 rtd->ops.ioctl          = soc_pcm_ioctl;
3124         } else {
3125                 rtd->ops.open           = soc_pcm_open;
3126                 rtd->ops.hw_params      = soc_pcm_hw_params;
3127                 rtd->ops.prepare        = soc_pcm_prepare;
3128                 rtd->ops.trigger        = soc_pcm_trigger;
3129                 rtd->ops.hw_free        = soc_pcm_hw_free;
3130                 rtd->ops.close          = soc_pcm_close;
3131                 rtd->ops.pointer        = soc_pcm_pointer;
3132                 rtd->ops.ioctl          = soc_pcm_ioctl;
3133         }
3134
3135         for_each_rtdcom(rtd, rtdcom) {
3136                 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
3137
3138                 if (!ops)
3139                         continue;
3140
3141                 if (ops->ack)
3142                         rtd->ops.ack            = soc_rtdcom_ack;
3143                 if (ops->copy_user)
3144                         rtd->ops.copy_user      = soc_rtdcom_copy_user;
3145                 if (ops->copy_kernel)
3146                         rtd->ops.copy_kernel    = soc_rtdcom_copy_kernel;
3147                 if (ops->fill_silence)
3148                         rtd->ops.fill_silence   = soc_rtdcom_fill_silence;
3149                 if (ops->page)
3150                         rtd->ops.page           = soc_rtdcom_page;
3151                 if (ops->mmap)
3152                         rtd->ops.mmap           = soc_rtdcom_mmap;
3153         }
3154
3155         if (playback)
3156                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3157
3158         if (capture)
3159                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3160
3161         for_each_rtdcom(rtd, rtdcom) {
3162                 component = rtdcom->component;
3163
3164                 if (!component->driver->pcm_new)
3165                         continue;
3166
3167                 ret = component->driver->pcm_new(rtd);
3168                 if (ret < 0) {
3169                         dev_err(component->dev,
3170                                 "ASoC: pcm constructor failed: %d\n",
3171                                 ret);
3172                         return ret;
3173                 }
3174         }
3175
3176         pcm->private_free = soc_pcm_private_free;
3177 out:
3178         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3179                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3180                  cpu_dai->name);
3181         return ret;
3182 }
3183
3184 /* is the current PCM operation for this FE ? */
3185 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3186 {
3187         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3188                 return 1;
3189         return 0;
3190 }
3191 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3192
3193 /* is the current PCM operation for this BE ? */
3194 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3195                 struct snd_soc_pcm_runtime *be, int stream)
3196 {
3197         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3198            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3199                   be->dpcm[stream].runtime_update))
3200                 return 1;
3201         return 0;
3202 }
3203 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3204
3205 /* get the substream for this BE */
3206 struct snd_pcm_substream *
3207         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3208 {
3209         return be->pcm->streams[stream].substream;
3210 }
3211 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3212
3213 /* get the BE runtime state */
3214 enum snd_soc_dpcm_state
3215         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3216 {
3217         return be->dpcm[stream].state;
3218 }
3219 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3220
3221 /* set the BE runtime state */
3222 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3223                 int stream, enum snd_soc_dpcm_state state)
3224 {
3225         be->dpcm[stream].state = state;
3226 }
3227 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3228
3229 /*
3230  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3231  * are not running, paused or suspended for the specified stream direction.
3232  */
3233 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3234                 struct snd_soc_pcm_runtime *be, int stream)
3235 {
3236         struct snd_soc_dpcm *dpcm;
3237         int state;
3238         int ret = 1;
3239         unsigned long flags;
3240
3241         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3242         for_each_dpcm_fe(be, stream, dpcm) {
3243
3244                 if (dpcm->fe == fe)
3245                         continue;
3246
3247                 state = dpcm->fe->dpcm[stream].state;
3248                 if (state == SND_SOC_DPCM_STATE_START ||
3249                         state == SND_SOC_DPCM_STATE_PAUSED ||
3250                         state == SND_SOC_DPCM_STATE_SUSPEND) {
3251                         ret = 0;
3252                         break;
3253                 }
3254         }
3255         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3256
3257         /* it's safe to free/stop this BE DAI */
3258         return ret;
3259 }
3260 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3261
3262 /*
3263  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3264  * running, paused or suspended for the specified stream direction.
3265  */
3266 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3267                 struct snd_soc_pcm_runtime *be, int stream)
3268 {
3269         struct snd_soc_dpcm *dpcm;
3270         int state;
3271         int ret = 1;
3272         unsigned long flags;
3273
3274         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3275         for_each_dpcm_fe(be, stream, dpcm) {
3276
3277                 if (dpcm->fe == fe)
3278                         continue;
3279
3280                 state = dpcm->fe->dpcm[stream].state;
3281                 if (state == SND_SOC_DPCM_STATE_START ||
3282                         state == SND_SOC_DPCM_STATE_PAUSED ||
3283                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3284                         state == SND_SOC_DPCM_STATE_PREPARE) {
3285                         ret = 0;
3286                         break;
3287                 }
3288         }
3289         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3290
3291         /* it's safe to change hw_params */
3292         return ret;
3293 }
3294 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3295
3296 #ifdef CONFIG_DEBUG_FS
3297 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3298 {
3299         switch (state) {
3300         case SND_SOC_DPCM_STATE_NEW:
3301                 return "new";
3302         case SND_SOC_DPCM_STATE_OPEN:
3303                 return "open";
3304         case SND_SOC_DPCM_STATE_HW_PARAMS:
3305                 return "hw_params";
3306         case SND_SOC_DPCM_STATE_PREPARE:
3307                 return "prepare";
3308         case SND_SOC_DPCM_STATE_START:
3309                 return "start";
3310         case SND_SOC_DPCM_STATE_STOP:
3311                 return "stop";
3312         case SND_SOC_DPCM_STATE_SUSPEND:
3313                 return "suspend";
3314         case SND_SOC_DPCM_STATE_PAUSED:
3315                 return "paused";
3316         case SND_SOC_DPCM_STATE_HW_FREE:
3317                 return "hw_free";
3318         case SND_SOC_DPCM_STATE_CLOSE:
3319                 return "close";
3320         }
3321
3322         return "unknown";
3323 }
3324
3325 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3326                                 int stream, char *buf, size_t size)
3327 {
3328         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3329         struct snd_soc_dpcm *dpcm;
3330         ssize_t offset = 0;
3331         unsigned long flags;
3332
3333         /* FE state */
3334         offset += snprintf(buf + offset, size - offset,
3335                         "[%s - %s]\n", fe->dai_link->name,
3336                         stream ? "Capture" : "Playback");
3337
3338         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3339                         dpcm_state_string(fe->dpcm[stream].state));
3340
3341         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3342             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3343                 offset += snprintf(buf + offset, size - offset,
3344                                 "Hardware Params: "
3345                                 "Format = %s, Channels = %d, Rate = %d\n",
3346                                 snd_pcm_format_name(params_format(params)),
3347                                 params_channels(params),
3348                                 params_rate(params));
3349
3350         /* BEs state */
3351         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3352
3353         if (list_empty(&fe->dpcm[stream].be_clients)) {
3354                 offset += snprintf(buf + offset, size - offset,
3355                                 " No active DSP links\n");
3356                 goto out;
3357         }
3358
3359         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3360         for_each_dpcm_be(fe, stream, dpcm) {
3361                 struct snd_soc_pcm_runtime *be = dpcm->be;
3362                 params = &dpcm->hw_params;
3363
3364                 offset += snprintf(buf + offset, size - offset,
3365                                 "- %s\n", be->dai_link->name);
3366
3367                 offset += snprintf(buf + offset, size - offset,
3368                                 "   State: %s\n",
3369                                 dpcm_state_string(be->dpcm[stream].state));
3370
3371                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3372                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3373                         offset += snprintf(buf + offset, size - offset,
3374                                 "   Hardware Params: "
3375                                 "Format = %s, Channels = %d, Rate = %d\n",
3376                                 snd_pcm_format_name(params_format(params)),
3377                                 params_channels(params),
3378                                 params_rate(params));
3379         }
3380         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3381 out:
3382         return offset;
3383 }
3384
3385 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3386                                 size_t count, loff_t *ppos)
3387 {
3388         struct snd_soc_pcm_runtime *fe = file->private_data;
3389         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3390         char *buf;
3391
3392         buf = kmalloc(out_count, GFP_KERNEL);
3393         if (!buf)
3394                 return -ENOMEM;
3395
3396         if (fe->cpu_dai->driver->playback.channels_min)
3397                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3398                                         buf + offset, out_count - offset);
3399
3400         if (fe->cpu_dai->driver->capture.channels_min)
3401                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3402                                         buf + offset, out_count - offset);
3403
3404         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3405
3406         kfree(buf);
3407         return ret;
3408 }
3409
3410 static const struct file_operations dpcm_state_fops = {
3411         .open = simple_open,
3412         .read = dpcm_state_read_file,
3413         .llseek = default_llseek,
3414 };
3415
3416 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3417 {
3418         if (!rtd->dai_link)
3419                 return;
3420
3421         if (!rtd->card->debugfs_card_root)
3422                 return;
3423
3424         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3425                         rtd->card->debugfs_card_root);
3426         if (!rtd->debugfs_dpcm_root) {
3427                 dev_dbg(rtd->dev,
3428                          "ASoC: Failed to create dpcm debugfs directory %s\n",
3429                          rtd->dai_link->name);
3430                 return;
3431         }
3432
3433         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3434                             rtd, &dpcm_state_fops);
3435 }
3436 #endif