sound/soc/soc-pcm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // soc-pcm.c  --  ALSA SoC PCM
   4 //
   5 // Copyright 2005 Wolfson Microelectronics PLC.
   6 // Copyright 2005 Openedhand Ltd.
   7 // Copyright (C) 2010 Slimlogic Ltd.
   8 // Copyright (C) 2010 Texas Instruments Inc.
   9 //
  10 // Authors: Liam Girdwood <lrg@ti.com>
  11 //          Mark Brown <broonie@opensource.wolfsonmicro.com>
  12
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/delay.h>
  16 #include <linux/pinctrl/consumer.h>
  17 #include <linux/pm_runtime.h>
  18 #include <linux/slab.h>
  19 #include <linux/workqueue.h>
  20 #include <linux/export.h>
  21 #include <linux/debugfs.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/soc-dpcm.h>
  27 #include <sound/initval.h>
  28
  29 #define DPCM_MAX_BE_USERS       8
  30
  31 /**
  32  * snd_soc_runtime_activate() - Increment active count for PCM runtime components
  33  * @rtd: ASoC PCM runtime that is activated
  34  * @stream: Direction of the PCM stream
  35  *
  36  * Increments the active count for all the DAIs and components attached to a PCM
  37  * runtime. Should typically be called when a stream is opened.
  38  *
  39  * Must be called with the rtd->card->pcm_mutex being held
  40  */
  41 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
  42 {
  43         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  44         struct snd_soc_dai *codec_dai;
  45         int i;
  46
  47         lockdep_assert_held(&rtd->card->pcm_mutex);
  48
  49         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  50                 cpu_dai->playback_active++;
  51                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  52                         codec_dai->playback_active++;
  53         } else {
  54                 cpu_dai->capture_active++;
  55                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  56                         codec_dai->capture_active++;
  57         }
  58
  59         cpu_dai->active++;
  60         cpu_dai->component->active++;
  61         for_each_rtd_codec_dai(rtd, i, codec_dai) {
  62                 codec_dai->active++;
  63                 codec_dai->component->active++;
  64         }
  65 }
  66
  67 /**
  68  * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
  69  * @rtd: ASoC PCM runtime that is deactivated
  70  * @stream: Direction of the PCM stream
  71  *
  72  * Decrements the active count for all the DAIs and components attached to a PCM
  73  * runtime. Should typically be called when a stream is closed.
  74  *
  75  * Must be called with the rtd->card->pcm_mutex being held
  76  */
  77 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
  78 {
  79         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  80         struct snd_soc_dai *codec_dai;
  81         int i;
  82
  83         lockdep_assert_held(&rtd->card->pcm_mutex);
  84
  85         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  86                 cpu_dai->playback_active--;
  87                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  88                         codec_dai->playback_active--;
  89         } else {
  90                 cpu_dai->capture_active--;
  91                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  92                         codec_dai->capture_active--;
  93         }
  94
  95         cpu_dai->active--;
  96         cpu_dai->component->active--;
  97         for_each_rtd_codec_dai(rtd, i, codec_dai) {
  98                 codec_dai->component->active--;
  99                 codec_dai->active--;
 100         }
 101 }
 102
 103 /**
 104  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
 105  * @rtd: The ASoC PCM runtime that should be checked.
 106  *
 107  * This function checks whether the power down delay should be ignored for a
 108  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
 109  * been configured to ignore the delay, or if none of the components benefits
 110  * from having the delay.
 111  */
 112 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
 113 {
 114         struct snd_soc_rtdcom_list *rtdcom;
 115         struct snd_soc_component *component;
 116         bool ignore = true;
 117
 118         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
 119                 return true;
 120
 121         for_each_rtd_components(rtd, rtdcom, component)
 122                 ignore &= !component->driver->use_pmdown_time;
 123
 124         return ignore;
 125 }
 126
 127 /**
 128  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 129  * @substream: the pcm substream
 130  * @hw: the hardware parameters
 131  *
 132  * Sets the substream runtime hardware parameters.
 133  */
 134 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 135         const struct snd_pcm_hardware *hw)
 136 {
 137         struct snd_pcm_runtime *runtime = substream->runtime;
 138         runtime->hw.info = hw->info;
 139         runtime->hw.formats = hw->formats;
 140         runtime->hw.period_bytes_min = hw->period_bytes_min;
 141         runtime->hw.period_bytes_max = hw->period_bytes_max;
 142         runtime->hw.periods_min = hw->periods_min;
 143         runtime->hw.periods_max = hw->periods_max;
 144         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
 145         runtime->hw.fifo_size = hw->fifo_size;
 146         return 0;
 147 }
 148 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 149
 150 /* DPCM stream event, send event to FE and all active BEs. */
 151 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
 152         int event)
 153 {
 154         struct snd_soc_dpcm *dpcm;
 155
 156         for_each_dpcm_be(fe, dir, dpcm) {
 157
 158                 struct snd_soc_pcm_runtime *be = dpcm->be;
 159
 160                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
 161                                 be->dai_link->name, event, dir);
 162
 163                 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
 164                     (be->dpcm[dir].users >= 1))
 165                         continue;
 166
 167                 snd_soc_dapm_stream_event(be, dir, event);
 168         }
 169
 170         snd_soc_dapm_stream_event(fe, dir, event);
 171
 172         return 0;
 173 }
 174
 175 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
 176                                         struct snd_soc_dai *soc_dai)
 177 {
 178         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 179         int ret;
 180
 181         if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
 182                                 rtd->dai_link->symmetric_rates)) {
 183                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
 184                                 soc_dai->rate);
 185
 186                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 187                                                 SNDRV_PCM_HW_PARAM_RATE,
 188                                                 soc_dai->rate);
 189                 if (ret < 0) {
 190                         dev_err(soc_dai->dev,
 191                                 "ASoC: Unable to apply rate constraint: %d\n",
 192                                 ret);
 193                         return ret;
 194                 }
 195         }
 196
 197         if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
 198                                 rtd->dai_link->symmetric_channels)) {
 199                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
 200                                 soc_dai->channels);
 201
 202                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 203                                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 204                                                 soc_dai->channels);
 205                 if (ret < 0) {
 206                         dev_err(soc_dai->dev,
 207                                 "ASoC: Unable to apply channel symmetry constraint: %d\n",
 208                                 ret);
 209                         return ret;
 210                 }
 211         }
 212
 213         if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
 214                                 rtd->dai_link->symmetric_samplebits)) {
 215                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
 216                                 soc_dai->sample_bits);
 217
 218                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 219                                                 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 220                                                 soc_dai->sample_bits);
 221                 if (ret < 0) {
 222                         dev_err(soc_dai->dev,
 223                                 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
 224                                 ret);
 225                         return ret;
 226                 }
 227         }
 228
 229         return 0;
 230 }
 231
 232 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 233                                 struct snd_pcm_hw_params *params)
 234 {
 235         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 236         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 237         struct snd_soc_dai *codec_dai;
 238         unsigned int rate, channels, sample_bits, symmetry, i;
 239
 240         rate = params_rate(params);
 241         channels = params_channels(params);
 242         sample_bits = snd_pcm_format_physical_width(params_format(params));
 243
 244         /* reject unmatched parameters when applying symmetry */
 245         symmetry = cpu_dai->driver->symmetric_rates ||
 246                 rtd->dai_link->symmetric_rates;
 247
 248         for_each_rtd_codec_dai(rtd, i, codec_dai)
 249                 symmetry |= codec_dai->driver->symmetric_rates;
 250
 251         if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
 252                 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
 253                                 cpu_dai->rate, rate);
 254                 return -EINVAL;
 255         }
 256
 257         symmetry = cpu_dai->driver->symmetric_channels ||
 258                 rtd->dai_link->symmetric_channels;
 259
 260         for_each_rtd_codec_dai(rtd, i, codec_dai)
 261                 symmetry |= codec_dai->driver->symmetric_channels;
 262
 263         if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
 264                 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
 265                                 cpu_dai->channels, channels);
 266                 return -EINVAL;
 267         }
 268
 269         symmetry = cpu_dai->driver->symmetric_samplebits ||
 270                 rtd->dai_link->symmetric_samplebits;
 271
 272         for_each_rtd_codec_dai(rtd, i, codec_dai)
 273                 symmetry |= codec_dai->driver->symmetric_samplebits;
 274
 275         if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
 276                 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
 277                                 cpu_dai->sample_bits, sample_bits);
 278                 return -EINVAL;
 279         }
 280
 281         return 0;
 282 }
 283
 284 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
 285 {
 286         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 287         struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
 288         struct snd_soc_dai_link *link = rtd->dai_link;
 289         struct snd_soc_dai *codec_dai;
 290         unsigned int symmetry, i;
 291
 292         symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
 293                 cpu_driver->symmetric_channels || link->symmetric_channels ||
 294                 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
 295
 296         for_each_rtd_codec_dai(rtd, i, codec_dai)
 297                 symmetry = symmetry ||
 298                         codec_dai->driver->symmetric_rates ||
 299                         codec_dai->driver->symmetric_channels ||
 300                         codec_dai->driver->symmetric_samplebits;
 301
 302         return symmetry;
 303 }
 304
 305 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
 306 {
 307         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 308         int ret;
 309
 310         if (!bits)
 311                 return;
 312
 313         ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
 314         if (ret != 0)
 315                 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
 316                                  bits, ret);
 317 }
 318
 319 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 320 {
 321         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 322         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 323         struct snd_soc_dai *codec_dai;
 324         int i;
 325         unsigned int bits = 0, cpu_bits;
 326
 327         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 328                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 329                         if (codec_dai->driver->playback.sig_bits == 0) {
 330                                 bits = 0;
 331                                 break;
 332                         }
 333                         bits = max(codec_dai->driver->playback.sig_bits, bits);
 334                 }
 335                 cpu_bits = cpu_dai->driver->playback.sig_bits;
 336         } else {
 337                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 338                         if (codec_dai->driver->capture.sig_bits == 0) {
 339                                 bits = 0;
 340                                 break;
 341                         }
 342                         bits = max(codec_dai->driver->capture.sig_bits, bits);
 343                 }
 344                 cpu_bits = cpu_dai->driver->capture.sig_bits;
 345         }
 346
 347         soc_pcm_set_msb(substream, bits);
 348         soc_pcm_set_msb(substream, cpu_bits);
 349 }
 350
 351 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 352 {
 353         struct snd_pcm_runtime *runtime = substream->runtime;
 354         struct snd_pcm_hardware *hw = &runtime->hw;
 355         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 356         struct snd_soc_dai *codec_dai;
 357         struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
 358         struct snd_soc_dai_driver *codec_dai_drv;
 359         struct snd_soc_pcm_stream *codec_stream;
 360         struct snd_soc_pcm_stream *cpu_stream;
 361         unsigned int chan_min = 0, chan_max = UINT_MAX;
 362         unsigned int rate_min = 0, rate_max = UINT_MAX;
 363         unsigned int rates = UINT_MAX;
 364         u64 formats = ULLONG_MAX;
 365         int i;
 366
 367         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 368                 cpu_stream = &cpu_dai_drv->playback;
 369         else
 370                 cpu_stream = &cpu_dai_drv->capture;
 371
 372         /* first calculate min/max only for CODECs in the DAI link */
 373         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 374
 375                 /*
 376                  * Skip CODECs which don't support the current stream type.
 377                  * Otherwise, since the rate, channel, and format values will
 378                  * zero in that case, we would have no usable settings left,
 379                  * causing the resulting setup to fail.
 380                  * At least one CODEC should match, otherwise we should have
 381                  * bailed out on a higher level, since there would be no
 382                  * CODEC to support the transfer direction in that case.
 383                  */
 384                 if (!snd_soc_dai_stream_valid(codec_dai,
 385                                               substream->stream))
 386                         continue;
 387
 388                 codec_dai_drv = codec_dai->driver;
 389                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 390                         codec_stream = &codec_dai_drv->playback;
 391                 else
 392                         codec_stream = &codec_dai_drv->capture;
 393                 chan_min = max(chan_min, codec_stream->channels_min);
 394                 chan_max = min(chan_max, codec_stream->channels_max);
 395                 rate_min = max(rate_min, codec_stream->rate_min);
 396                 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
 397                 formats &= codec_stream->formats;
 398                 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
 399         }
 400
 401         /*
 402          * chan min/max cannot be enforced if there are multiple CODEC DAIs
 403          * connected to a single CPU DAI, use CPU DAI's directly and let
 404          * channel allocation be fixed up later
 405          */
 406         if (rtd->num_codecs > 1) {
 407                 chan_min = cpu_stream->channels_min;
 408                 chan_max = cpu_stream->channels_max;
 409         }
 410
 411         hw->channels_min = max(chan_min, cpu_stream->channels_min);
 412         hw->channels_max = min(chan_max, cpu_stream->channels_max);
 413         if (hw->formats)
 414                 hw->formats &= formats & cpu_stream->formats;
 415         else
 416                 hw->formats = formats & cpu_stream->formats;
 417         hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
 418
 419         snd_pcm_limit_hw_rates(runtime);
 420
 421         hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
 422         hw->rate_min = max(hw->rate_min, rate_min);
 423         hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
 424         hw->rate_max = min_not_zero(hw->rate_max, rate_max);
 425 }
 426
 427 static int soc_pcm_components_open(struct snd_pcm_substream *substream,
 428                                    struct snd_soc_component **last)
 429 {
 430         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 431         struct snd_soc_rtdcom_list *rtdcom;
 432         struct snd_soc_component *component;
 433         int ret = 0;
 434
 435         for_each_rtd_components(rtd, rtdcom, component) {
 436                 *last = component;
 437
 438                 ret = snd_soc_component_module_get_when_open(component);
 439                 if (ret < 0) {
 440                         dev_err(component->dev,
 441                                 "ASoC: can't get module %s\n",
 442                                 component->name);
 443                         return ret;
 444                 }
 445
 446                 ret = snd_soc_component_open(component, substream);
 447                 if (ret < 0) {
 448                         dev_err(component->dev,
 449                                 "ASoC: can't open component %s: %d\n",
 450                                 component->name, ret);
 451                         return ret;
 452                 }
 453         }
 454         *last = NULL;
 455         return 0;
 456 }
 457
 458 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 459                                     struct snd_soc_component *last)
 460 {
 461         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 462         struct snd_soc_rtdcom_list *rtdcom;
 463         struct snd_soc_component *component;
 464         int ret = 0;
 465
 466         for_each_rtd_components(rtd, rtdcom, component) {
 467                 if (component == last)
 468                         break;
 469
 470                 ret |= snd_soc_component_close(component, substream);
 471                 snd_soc_component_module_put_when_close(component);
 472         }
 473
 474         return ret;
 475 }
 476
 477 /*
 478  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 479  * then initialized and any private data can be allocated. This also calls
 480  * startup for the cpu DAI, component, machine and codec DAI.
 481  */
 482 static int soc_pcm_open(struct snd_pcm_substream *substream)
 483 {
 484         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 485         struct snd_pcm_runtime *runtime = substream->runtime;
 486         struct snd_soc_component *component;
 487         struct snd_soc_rtdcom_list *rtdcom;
 488         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 489         struct snd_soc_dai *codec_dai;
 490         const char *codec_dai_name = "multicodec";
 491         int i, ret = 0;
 492
 493         pinctrl_pm_select_default_state(cpu_dai->dev);
 494         for_each_rtd_codec_dai(rtd, i, codec_dai)
 495                 pinctrl_pm_select_default_state(codec_dai->dev);
 496
 497         for_each_rtd_components(rtd, rtdcom, component) {
 498                 pm_runtime_get_sync(component->dev);
 499         }
 500
 501         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 502
 503         /* startup the audio subsystem */
 504         ret = snd_soc_dai_startup(cpu_dai, substream);
 505         if (ret < 0) {
 506                 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
 507                         cpu_dai->name, ret);
 508                 goto out;
 509         }
 510
 511         ret = soc_pcm_components_open(substream, &component);
 512         if (ret < 0)
 513                 goto component_err;
 514
 515         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 516                 ret = snd_soc_dai_startup(codec_dai, substream);
 517                 if (ret < 0) {
 518                         dev_err(codec_dai->dev,
 519                                 "ASoC: can't open codec %s: %d\n",
 520                                 codec_dai->name, ret);
 521                         goto codec_dai_err;
 522                 }
 523
 524                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 525                         codec_dai->tx_mask = 0;
 526                 else
 527                         codec_dai->rx_mask = 0;
 528         }
 529
 530         if (rtd->dai_link->ops->startup) {
 531                 ret = rtd->dai_link->ops->startup(substream);
 532                 if (ret < 0) {
 533                         pr_err("ASoC: %s startup failed: %d\n",
 534                                rtd->dai_link->name, ret);
 535                         goto machine_err;
 536                 }
 537         }
 538
 539         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 540         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 541                 goto dynamic;
 542
 543         /* Check that the codec and cpu DAIs are compatible */
 544         soc_pcm_init_runtime_hw(substream);
 545
 546         if (rtd->num_codecs == 1)
 547                 codec_dai_name = rtd->codec_dai->name;
 548
 549         if (soc_pcm_has_symmetry(substream))
 550                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 551
 552         ret = -EINVAL;
 553         if (!runtime->hw.rates) {
 554                 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
 555                         codec_dai_name, cpu_dai->name);
 556                 goto config_err;
 557         }
 558         if (!runtime->hw.formats) {
 559                 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
 560                         codec_dai_name, cpu_dai->name);
 561                 goto config_err;
 562         }
 563         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 564             runtime->hw.channels_min > runtime->hw.channels_max) {
 565                 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
 566                                 codec_dai_name, cpu_dai->name);
 567                 goto config_err;
 568         }
 569
 570         soc_pcm_apply_msb(substream);
 571
 572         /* Symmetry only applies if we've already got an active stream. */
 573         if (cpu_dai->active) {
 574                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
 575                 if (ret != 0)
 576                         goto config_err;
 577         }
 578
 579         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 580                 if (codec_dai->active) {
 581                         ret = soc_pcm_apply_symmetry(substream, codec_dai);
 582                         if (ret != 0)
 583                                 goto config_err;
 584                 }
 585         }
 586
 587         pr_debug("ASoC: %s <-> %s info:\n",
 588                         codec_dai_name, cpu_dai->name);
 589         pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
 590         pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
 591                  runtime->hw.channels_max);
 592         pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
 593                  runtime->hw.rate_max);
 594
 595 dynamic:
 596
 597         snd_soc_runtime_activate(rtd, substream->stream);
 598
 599         mutex_unlock(&rtd->card->pcm_mutex);
 600         return 0;
 601
 602 config_err:
 603         if (rtd->dai_link->ops->shutdown)
 604                 rtd->dai_link->ops->shutdown(substream);
 605
 606 machine_err:
 607         i = rtd->num_codecs;
 608
 609 codec_dai_err:
 610         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
 611                 snd_soc_dai_shutdown(codec_dai, substream);
 612
 613 component_err:
 614         soc_pcm_components_close(substream, component);
 615
 616         snd_soc_dai_shutdown(cpu_dai, substream);
 617 out:
 618         mutex_unlock(&rtd->card->pcm_mutex);
 619
 620         for_each_rtd_components(rtd, rtdcom, component) {
 621                 pm_runtime_mark_last_busy(component->dev);
 622                 pm_runtime_put_autosuspend(component->dev);
 623         }
 624
 625         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 626                 if (!codec_dai->active)
 627                         pinctrl_pm_select_sleep_state(codec_dai->dev);
 628         }
 629         if (!cpu_dai->active)
 630                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 631
 632         return ret;
 633 }
 634
 635 /*
 636  * Power down the audio subsystem pmdown_time msecs after close is called.
 637  * This is to ensure there are no pops or clicks in between any music tracks
 638  * due to DAPM power cycling.
 639  */
 640 static void close_delayed_work(struct snd_soc_pcm_runtime *rtd)
 641 {
 642         struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
 643
 644         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 645
 646         dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
 647                  codec_dai->driver->playback.stream_name,
 648                  codec_dai->playback_active ? "active" : "inactive",
 649                  rtd->pop_wait ? "yes" : "no");
 650
 651         /* are we waiting on this codec DAI stream */
 652         if (rtd->pop_wait == 1) {
 653                 rtd->pop_wait = 0;
 654                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 655                                           SND_SOC_DAPM_STREAM_STOP);
 656         }
 657
 658         mutex_unlock(&rtd->card->pcm_mutex);
 659 }
 660
 661 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
 662 {
 663         /*
 664          * Currently nothing to do for c2c links
 665          * Since c2c links are internal nodes in the DAPM graph and
 666          * don't interface with the outside world or application layer
 667          * we don't have to do any special handling on close.
 668          */
 669 }
 670
 671 /*
 672  * Called by ALSA when a PCM substream is closed. Private data can be
 673  * freed here. The cpu DAI, codec DAI, machine and components are also
 674  * shutdown.
 675  */
 676 static int soc_pcm_close(struct snd_pcm_substream *substream)
 677 {
 678         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 679         struct snd_soc_component *component;
 680         struct snd_soc_rtdcom_list *rtdcom;
 681         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 682         struct snd_soc_dai *codec_dai;
 683         int i;
 684
 685         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 686
 687         snd_soc_runtime_deactivate(rtd, substream->stream);
 688
 689         /* clear the corresponding DAIs rate when inactive */
 690         if (!cpu_dai->active)
 691                 cpu_dai->rate = 0;
 692
 693         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 694                 if (!codec_dai->active)
 695                         codec_dai->rate = 0;
 696         }
 697
 698         snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
 699
 700         snd_soc_dai_shutdown(cpu_dai, substream);
 701
 702         for_each_rtd_codec_dai(rtd, i, codec_dai)
 703                 snd_soc_dai_shutdown(codec_dai, substream);
 704
 705         if (rtd->dai_link->ops->shutdown)
 706                 rtd->dai_link->ops->shutdown(substream);
 707
 708         soc_pcm_components_close(substream, NULL);
 709
 710         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 711                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 712                         /* powered down playback stream now */
 713                         snd_soc_dapm_stream_event(rtd,
 714                                                   SNDRV_PCM_STREAM_PLAYBACK,
 715                                                   SND_SOC_DAPM_STREAM_STOP);
 716                 } else {
 717                         /* start delayed pop wq here for playback streams */
 718                         rtd->pop_wait = 1;
 719                         queue_delayed_work(system_power_efficient_wq,
 720                                            &rtd->delayed_work,
 721                                            msecs_to_jiffies(rtd->pmdown_time));
 722                 }
 723         } else {
 724                 /* capture streams can be powered down now */
 725                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 726                                           SND_SOC_DAPM_STREAM_STOP);
 727         }
 728
 729         mutex_unlock(&rtd->card->pcm_mutex);
 730
 731         for_each_rtd_components(rtd, rtdcom, component) {
 732                 pm_runtime_mark_last_busy(component->dev);
 733                 pm_runtime_put_autosuspend(component->dev);
 734         }
 735
 736         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 737                 if (!codec_dai->active)
 738                         pinctrl_pm_select_sleep_state(codec_dai->dev);
 739         }
 740         if (!cpu_dai->active)
 741                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 742
 743         return 0;
 744 }
 745
 746 /*
 747  * Called by ALSA when the PCM substream is prepared, can set format, sample
 748  * rate, etc.  This function is non atomic and can be called multiple times,
 749  * it can refer to the runtime info.
 750  */
 751 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 752 {
 753         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 754         struct snd_soc_component *component;
 755         struct snd_soc_rtdcom_list *rtdcom;
 756         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 757         struct snd_soc_dai *codec_dai;
 758         int i, ret = 0;
 759
 760         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 761
 762         if (rtd->dai_link->ops->prepare) {
 763                 ret = rtd->dai_link->ops->prepare(substream);
 764                 if (ret < 0) {
 765                         dev_err(rtd->card->dev, "ASoC: machine prepare error:"
 766                                 " %d\n", ret);
 767                         goto out;
 768                 }
 769         }
 770
 771         for_each_rtd_components(rtd, rtdcom, component) {
 772                 ret = snd_soc_component_prepare(component, substream);
 773                 if (ret < 0) {
 774                         dev_err(component->dev,
 775                                 "ASoC: platform prepare error: %d\n", ret);
 776                         goto out;
 777                 }
 778         }
 779
 780         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 781                 ret = snd_soc_dai_prepare(codec_dai, substream);
 782                 if (ret < 0) {
 783                         dev_err(codec_dai->dev,
 784                                 "ASoC: codec DAI prepare error: %d\n",
 785                                 ret);
 786                         goto out;
 787                 }
 788         }
 789
 790         ret = snd_soc_dai_prepare(cpu_dai, substream);
 791         if (ret < 0) {
 792                 dev_err(cpu_dai->dev,
 793                         "ASoC: cpu DAI prepare error: %d\n", ret);
 794                 goto out;
 795         }
 796
 797         /* cancel any delayed stream shutdown that is pending */
 798         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 799             rtd->pop_wait) {
 800                 rtd->pop_wait = 0;
 801                 cancel_delayed_work(&rtd->delayed_work);
 802         }
 803
 804         snd_soc_dapm_stream_event(rtd, substream->stream,
 805                         SND_SOC_DAPM_STREAM_START);
 806
 807         for_each_rtd_codec_dai(rtd, i, codec_dai)
 808                 snd_soc_dai_digital_mute(codec_dai, 0,
 809                                          substream->stream);
 810         snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
 811
 812 out:
 813         mutex_unlock(&rtd->card->pcm_mutex);
 814         return ret;
 815 }
 816
 817 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 818                                        unsigned int mask)
 819 {
 820         struct snd_interval *interval;
 821         int channels = hweight_long(mask);
 822
 823         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 824         interval->min = channels;
 825         interval->max = channels;
 826 }
 827
 828 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
 829                                       struct snd_soc_component *last)
 830 {
 831         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 832         struct snd_soc_rtdcom_list *rtdcom;
 833         struct snd_soc_component *component;
 834         int ret = 0;
 835
 836         for_each_rtd_components(rtd, rtdcom, component) {
 837                 if (component == last)
 838                         break;
 839
 840                 ret |= snd_soc_component_hw_free(component, substream);
 841         }
 842
 843         return ret;
 844 }
 845
 846 /*
 847  * Called by ALSA when the hardware params are set by application. This
 848  * function can also be called multiple times and can allocate buffers
 849  * (using snd_pcm_lib_* ). It's non-atomic.
 850  */
 851 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 852                                 struct snd_pcm_hw_params *params)
 853 {
 854         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 855         struct snd_soc_component *component;
 856         struct snd_soc_rtdcom_list *rtdcom;
 857         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 858         struct snd_soc_dai *codec_dai;
 859         int i, ret = 0;
 860
 861         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 862
 863         ret = soc_pcm_params_symmetry(substream, params);
 864         if (ret)
 865                 goto out;
 866
 867         if (rtd->dai_link->ops->hw_params) {
 868                 ret = rtd->dai_link->ops->hw_params(substream, params);
 869                 if (ret < 0) {
 870                         dev_err(rtd->card->dev, "ASoC: machine hw_params"
 871                                 " failed: %d\n", ret);
 872                         goto out;
 873                 }
 874         }
 875
 876         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 877                 struct snd_pcm_hw_params codec_params;
 878
 879                 /*
 880                  * Skip CODECs which don't support the current stream type,
 881                  * the idea being that if a CODEC is not used for the currently
 882                  * set up transfer direction, it should not need to be
 883                  * configured, especially since the configuration used might
 884                  * not even be supported by that CODEC. There may be cases
 885                  * however where a CODEC needs to be set up although it is
 886                  * actually not being used for the transfer, e.g. if a
 887                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
 888                  * for the DAI link including a playback-only CODEC.
 889                  * If this becomes necessary, we will have to augment the
 890                  * machine driver setup with information on how to act, so
 891                  * we can do the right thing here.
 892                  */
 893                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 894                         continue;
 895
 896                 /* copy params for each codec */
 897                 codec_params = *params;
 898
 899                 /* fixup params based on TDM slot masks */
 900                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 901                     codec_dai->tx_mask)
 902                         soc_pcm_codec_params_fixup(&codec_params,
 903                                                    codec_dai->tx_mask);
 904
 905                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
 906                     codec_dai->rx_mask)
 907                         soc_pcm_codec_params_fixup(&codec_params,
 908                                                    codec_dai->rx_mask);
 909
 910                 ret = snd_soc_dai_hw_params(codec_dai, substream,
 911                                             &codec_params);
 912                 if(ret < 0)
 913                         goto codec_err;
 914
 915                 codec_dai->rate = params_rate(&codec_params);
 916                 codec_dai->channels = params_channels(&codec_params);
 917                 codec_dai->sample_bits = snd_pcm_format_physical_width(
 918                                                 params_format(&codec_params));
 919
 920                 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
 921         }
 922
 923         ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
 924         if (ret < 0)
 925                 goto interface_err;
 926
 927         /* store the parameters for each DAIs */
 928         cpu_dai->rate = params_rate(params);
 929         cpu_dai->channels = params_channels(params);
 930         cpu_dai->sample_bits =
 931                 snd_pcm_format_physical_width(params_format(params));
 932
 933         snd_soc_dapm_update_dai(substream, params, cpu_dai);
 934
 935         for_each_rtd_components(rtd, rtdcom, component) {
 936                 ret = snd_soc_component_hw_params(component, substream, params);
 937                 if (ret < 0) {
 938                         dev_err(component->dev,
 939                                 "ASoC: %s hw params failed: %d\n",
 940                                 component->name, ret);
 941                         goto component_err;
 942                 }
 943         }
 944         component = NULL;
 945
 946 out:
 947         mutex_unlock(&rtd->card->pcm_mutex);
 948         return ret;
 949
 950 component_err:
 951         soc_pcm_components_hw_free(substream, component);
 952
 953         snd_soc_dai_hw_free(cpu_dai, substream);
 954         cpu_dai->rate = 0;
 955
 956 interface_err:
 957         i = rtd->num_codecs;
 958
 959 codec_err:
 960         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
 961                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 962                         continue;
 963
 964                 snd_soc_dai_hw_free(codec_dai, substream);
 965                 codec_dai->rate = 0;
 966         }
 967
 968         if (rtd->dai_link->ops->hw_free)
 969                 rtd->dai_link->ops->hw_free(substream);
 970
 971         mutex_unlock(&rtd->card->pcm_mutex);
 972         return ret;
 973 }
 974
 975 /*
 976  * Frees resources allocated by hw_params, can be called multiple times
 977  */
 978 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 979 {
 980         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 981         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 982         struct snd_soc_dai *codec_dai;
 983         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 984         int i;
 985
 986         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 987
 988         /* clear the corresponding DAIs parameters when going to be inactive */
 989         if (cpu_dai->active == 1) {
 990                 cpu_dai->rate = 0;
 991                 cpu_dai->channels = 0;
 992                 cpu_dai->sample_bits = 0;
 993         }
 994
 995         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 996                 if (codec_dai->active == 1) {
 997                         codec_dai->rate = 0;
 998                         codec_dai->channels = 0;
 999                         codec_dai->sample_bits = 0;
1000                 }
1001         }
1002
1003         /* apply codec digital mute */
1004         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1005                 if ((playback && codec_dai->playback_active == 1) ||
1006                     (!playback && codec_dai->capture_active == 1))
1007                         snd_soc_dai_digital_mute(codec_dai, 1,
1008                                                  substream->stream);
1009         }
1010
1011         /* free any machine hw params */
1012         if (rtd->dai_link->ops->hw_free)
1013                 rtd->dai_link->ops->hw_free(substream);
1014
1015         /* free any component resources */
1016         soc_pcm_components_hw_free(substream, NULL);
1017
1018         /* now free hw params for the DAIs  */
1019         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1020                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1021                         continue;
1022
1023                 snd_soc_dai_hw_free(codec_dai, substream);
1024         }
1025
1026         snd_soc_dai_hw_free(cpu_dai, substream);
1027
1028         mutex_unlock(&rtd->card->pcm_mutex);
1029         return 0;
1030 }
1031
1032 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
1033 {
1034         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1035         struct snd_soc_component *component;
1036         struct snd_soc_rtdcom_list *rtdcom;
1037         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1038         struct snd_soc_dai *codec_dai;
1039         int i, ret;
1040
1041         if (rtd->dai_link->ops->trigger) {
1042                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1043                 if (ret < 0)
1044                         return ret;
1045         }
1046
1047         for_each_rtd_components(rtd, rtdcom, component) {
1048                 ret = snd_soc_component_trigger(component, substream, cmd);
1049                 if (ret < 0)
1050                         return ret;
1051         }
1052
1053         ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1054         if (ret < 0)
1055                 return ret;
1056
1057         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1058                 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1059                 if (ret < 0)
1060                         return ret;
1061         }
1062
1063         return 0;
1064 }
1065
1066 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1067 {
1068         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1069         struct snd_soc_component *component;
1070         struct snd_soc_rtdcom_list *rtdcom;
1071         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1072         struct snd_soc_dai *codec_dai;
1073         int i, ret;
1074
1075         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1076                 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1077                 if (ret < 0)
1078                         return ret;
1079         }
1080
1081         ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1082         if (ret < 0)
1083                 return ret;
1084
1085         for_each_rtd_components(rtd, rtdcom, component) {
1086                 ret = snd_soc_component_trigger(component, substream, cmd);
1087                 if (ret < 0)
1088                         return ret;
1089         }
1090
1091         if (rtd->dai_link->ops->trigger) {
1092                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1093                 if (ret < 0)
1094                         return ret;
1095         }
1096
1097         return 0;
1098 }
1099
1100 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1101 {
1102         int ret;
1103
1104         switch (cmd) {
1105         case SNDRV_PCM_TRIGGER_START:
1106         case SNDRV_PCM_TRIGGER_RESUME:
1107         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1108                 ret = soc_pcm_trigger_start(substream, cmd);
1109                 break;
1110         case SNDRV_PCM_TRIGGER_STOP:
1111         case SNDRV_PCM_TRIGGER_SUSPEND:
1112         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1113                 ret = soc_pcm_trigger_stop(substream, cmd);
1114                 break;
1115         default:
1116                 return -EINVAL;
1117         }
1118
1119         return ret;
1120 }
1121
1122 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1123                                    int cmd)
1124 {
1125         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1126         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1127         struct snd_soc_dai *codec_dai;
1128         int i, ret;
1129
1130         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1131                 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1132                 if (ret < 0)
1133                         return ret;
1134         }
1135
1136         ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1137         if (ret < 0)
1138                 return ret;
1139
1140         return 0;
1141 }
1142 /*
1143  * soc level wrapper for pointer callback
1144  * If cpu_dai, codec_dai, component driver has the delay callback, then
1145  * the runtime->delay will be updated accordingly.
1146  */
1147 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1148 {
1149         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1150         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1151         struct snd_soc_dai *codec_dai;
1152         struct snd_pcm_runtime *runtime = substream->runtime;
1153         snd_pcm_uframes_t offset = 0;
1154         snd_pcm_sframes_t delay = 0;
1155         snd_pcm_sframes_t codec_delay = 0;
1156         int i;
1157
1158         /* clearing the previous total delay */
1159         runtime->delay = 0;
1160
1161         offset = snd_soc_pcm_component_pointer(substream);
1162
1163         /* base delay if assigned in pointer callback */
1164         delay = runtime->delay;
1165
1166         delay += snd_soc_dai_delay(cpu_dai, substream);
1167
1168         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1169                 codec_delay = max(codec_delay,
1170                                   snd_soc_dai_delay(codec_dai, substream));
1171         }
1172         delay += codec_delay;
1173
1174         runtime->delay = delay;
1175
1176         return offset;
1177 }
1178
1179 /* connect a FE and BE */
1180 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1181                 struct snd_soc_pcm_runtime *be, int stream)
1182 {
1183         struct snd_soc_dpcm *dpcm;
1184         unsigned long flags;
1185 #ifdef CONFIG_DEBUG_FS
1186         char *name;
1187 #endif
1188
1189         /* only add new dpcms */
1190         for_each_dpcm_be(fe, stream, dpcm) {
1191                 if (dpcm->be == be && dpcm->fe == fe)
1192                         return 0;
1193         }
1194
1195         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1196         if (!dpcm)
1197                 return -ENOMEM;
1198
1199         dpcm->be = be;
1200         dpcm->fe = fe;
1201         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1202         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1203         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1204         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1205         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1206         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1207
1208         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1209                         stream ? "capture" : "playback",  fe->dai_link->name,
1210                         stream ? "<-" : "->", be->dai_link->name);
1211
1212 #ifdef CONFIG_DEBUG_FS
1213         name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
1214                          stream ? "capture" : "playback");
1215         if (name) {
1216                 dpcm->debugfs_state = debugfs_create_dir(name,
1217                                                          fe->debugfs_dpcm_root);
1218                 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
1219                                    &dpcm->state);
1220                 kfree(name);
1221         }
1222 #endif
1223         return 1;
1224 }
1225
1226 /* reparent a BE onto another FE */
1227 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1228                         struct snd_soc_pcm_runtime *be, int stream)
1229 {
1230         struct snd_soc_dpcm *dpcm;
1231         struct snd_pcm_substream *fe_substream, *be_substream;
1232
1233         /* reparent if BE is connected to other FEs */
1234         if (!be->dpcm[stream].users)
1235                 return;
1236
1237         be_substream = snd_soc_dpcm_get_substream(be, stream);
1238
1239         for_each_dpcm_fe(be, stream, dpcm) {
1240                 if (dpcm->fe == fe)
1241                         continue;
1242
1243                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1244                         stream ? "capture" : "playback",
1245                         dpcm->fe->dai_link->name,
1246                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1247
1248                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1249                 be_substream->runtime = fe_substream->runtime;
1250                 break;
1251         }
1252 }
1253
1254 /* disconnect a BE and FE */
1255 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1256 {
1257         struct snd_soc_dpcm *dpcm, *d;
1258         unsigned long flags;
1259
1260         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1261                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1262                                 stream ? "capture" : "playback",
1263                                 dpcm->be->dai_link->name);
1264
1265                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1266                         continue;
1267
1268                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1269                         stream ? "capture" : "playback", fe->dai_link->name,
1270                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1271
1272                 /* BEs still alive need new FE */
1273                 dpcm_be_reparent(fe, dpcm->be, stream);
1274
1275 #ifdef CONFIG_DEBUG_FS
1276                 debugfs_remove_recursive(dpcm->debugfs_state);
1277 #endif
1278                 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1279                 list_del(&dpcm->list_be);
1280                 list_del(&dpcm->list_fe);
1281                 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1282                 kfree(dpcm);
1283         }
1284 }
1285
1286 /* get BE for DAI widget and stream */
1287 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1288                 struct snd_soc_dapm_widget *widget, int stream)
1289 {
1290         struct snd_soc_pcm_runtime *be;
1291         struct snd_soc_dai *dai;
1292         int i;
1293
1294         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1295
1296         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1297                 for_each_card_rtds(card, be) {
1298
1299                         if (!be->dai_link->no_pcm)
1300                                 continue;
1301
1302                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1303                                 be->cpu_dai->playback_widget ?
1304                                 be->cpu_dai->playback_widget->name : "(not set)");
1305
1306                         if (be->cpu_dai->playback_widget == widget)
1307                                 return be;
1308
1309                         for_each_rtd_codec_dai(be, i, dai) {
1310                                 if (dai->playback_widget == widget)
1311                                         return be;
1312                         }
1313                 }
1314         } else {
1315
1316                 for_each_card_rtds(card, be) {
1317
1318                         if (!be->dai_link->no_pcm)
1319                                 continue;
1320
1321                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1322                                 be->cpu_dai->capture_widget ?
1323                                 be->cpu_dai->capture_widget->name : "(not set)");
1324
1325                         if (be->cpu_dai->capture_widget == widget)
1326                                 return be;
1327
1328                         for_each_rtd_codec_dai(be, i, dai) {
1329                                 if (dai->capture_widget == widget)
1330                                         return be;
1331                         }
1332                 }
1333         }
1334
1335         /* dai link name and stream name set correctly ? */
1336         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1337                 stream ? "capture" : "playback", widget->name);
1338         return NULL;
1339 }
1340
1341 static inline struct snd_soc_dapm_widget *
1342         dai_get_widget(struct snd_soc_dai *dai, int stream)
1343 {
1344         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1345                 return dai->playback_widget;
1346         else
1347                 return dai->capture_widget;
1348 }
1349
1350 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1351                 struct snd_soc_dapm_widget *widget)
1352 {
1353         int i;
1354
1355         for (i = 0; i < list->num_widgets; i++) {
1356                 if (widget == list->widgets[i])
1357                         return 1;
1358         }
1359
1360         return 0;
1361 }
1362
1363 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1364                 enum snd_soc_dapm_direction dir)
1365 {
1366         struct snd_soc_card *card = widget->dapm->card;
1367         struct snd_soc_pcm_runtime *rtd;
1368         struct snd_soc_dai *dai;
1369         int i;
1370
1371         if (dir == SND_SOC_DAPM_DIR_OUT) {
1372                 for_each_card_rtds(card, rtd) {
1373                         if (!rtd->dai_link->no_pcm)
1374                                 continue;
1375
1376                         if (rtd->cpu_dai->playback_widget == widget)
1377                                 return true;
1378
1379                         for_each_rtd_codec_dai(rtd, i, dai) {
1380                                 if (dai->playback_widget == widget)
1381                                         return true;
1382                         }
1383                 }
1384         } else { /* SND_SOC_DAPM_DIR_IN */
1385                 for_each_card_rtds(card, rtd) {
1386                         if (!rtd->dai_link->no_pcm)
1387                                 continue;
1388
1389                         if (rtd->cpu_dai->capture_widget == widget)
1390                                 return true;
1391
1392                         for_each_rtd_codec_dai(rtd, i, dai) {
1393                                 if (dai->capture_widget == widget)
1394                                         return true;
1395                         }
1396                 }
1397         }
1398
1399         return false;
1400 }
1401
1402 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1403         int stream, struct snd_soc_dapm_widget_list **list)
1404 {
1405         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1406         int paths;
1407
1408         /* get number of valid DAI paths and their widgets */
1409         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1410                         dpcm_end_walk_at_be);
1411
1412         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1413                         stream ? "capture" : "playback");
1414
1415         return paths;
1416 }
1417
1418 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1419         struct snd_soc_dapm_widget_list **list_)
1420 {
1421         struct snd_soc_dpcm *dpcm;
1422         struct snd_soc_dapm_widget_list *list = *list_;
1423         struct snd_soc_dapm_widget *widget;
1424         struct snd_soc_dai *dai;
1425         int prune = 0;
1426         int do_prune;
1427
1428         /* Destroy any old FE <--> BE connections */
1429         for_each_dpcm_be(fe, stream, dpcm) {
1430                 unsigned int i;
1431
1432                 /* is there a valid CPU DAI widget for this BE */
1433                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1434
1435                 /* prune the BE if it's no longer in our active list */
1436                 if (widget && widget_in_list(list, widget))
1437                         continue;
1438
1439                 /* is there a valid CODEC DAI widget for this BE */
1440                 do_prune = 1;
1441                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1442                         widget = dai_get_widget(dai, stream);
1443
1444                         /* prune the BE if it's no longer in our active list */
1445                         if (widget && widget_in_list(list, widget))
1446                                 do_prune = 0;
1447                 }
1448                 if (!do_prune)
1449                         continue;
1450
1451                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1452                         stream ? "capture" : "playback",
1453                         dpcm->be->dai_link->name, fe->dai_link->name);
1454                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1455                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1456                 prune++;
1457         }
1458
1459         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1460         return prune;
1461 }
1462
1463 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1464         struct snd_soc_dapm_widget_list **list_)
1465 {
1466         struct snd_soc_card *card = fe->card;
1467         struct snd_soc_dapm_widget_list *list = *list_;
1468         struct snd_soc_pcm_runtime *be;
1469         int i, new = 0, err;
1470
1471         /* Create any new FE <--> BE connections */
1472         for (i = 0; i < list->num_widgets; i++) {
1473
1474                 switch (list->widgets[i]->id) {
1475                 case snd_soc_dapm_dai_in:
1476                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1477                                 continue;
1478                         break;
1479                 case snd_soc_dapm_dai_out:
1480                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1481                                 continue;
1482                         break;
1483                 default:
1484                         continue;
1485                 }
1486
1487                 /* is there a valid BE rtd for this widget */
1488                 be = dpcm_get_be(card, list->widgets[i], stream);
1489                 if (!be) {
1490                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1491                                         list->widgets[i]->name);
1492                         continue;
1493                 }
1494
1495                 /* make sure BE is a real BE */
1496                 if (!be->dai_link->no_pcm)
1497                         continue;
1498
1499                 /* don't connect if FE is not running */
1500                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1501                         continue;
1502
1503                 /* newly connected FE and BE */
1504                 err = dpcm_be_connect(fe, be, stream);
1505                 if (err < 0) {
1506                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1507                                 list->widgets[i]->name);
1508                         break;
1509                 } else if (err == 0) /* already connected */
1510                         continue;
1511
1512                 /* new */
1513                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1514                 new++;
1515         }
1516
1517         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1518         return new;
1519 }
1520
1521 /*
1522  * Find the corresponding BE DAIs that source or sink audio to this
1523  * FE substream.
1524  */
1525 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1526         int stream, struct snd_soc_dapm_widget_list **list, int new)
1527 {
1528         if (new)
1529                 return dpcm_add_paths(fe, stream, list);
1530         else
1531                 return dpcm_prune_paths(fe, stream, list);
1532 }
1533
1534 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1535 {
1536         struct snd_soc_dpcm *dpcm;
1537         unsigned long flags;
1538
1539         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1540         for_each_dpcm_be(fe, stream, dpcm)
1541                 dpcm->be->dpcm[stream].runtime_update =
1542                                                 SND_SOC_DPCM_UPDATE_NO;
1543         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1544 }
1545
1546 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1547         int stream)
1548 {
1549         struct snd_soc_dpcm *dpcm;
1550
1551         /* disable any enabled and non active backends */
1552         for_each_dpcm_be(fe, stream, dpcm) {
1553
1554                 struct snd_soc_pcm_runtime *be = dpcm->be;
1555                 struct snd_pcm_substream *be_substream =
1556                         snd_soc_dpcm_get_substream(be, stream);
1557
1558                 if (be->dpcm[stream].users == 0)
1559                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1560                                 stream ? "capture" : "playback",
1561                                 be->dpcm[stream].state);
1562
1563                 if (--be->dpcm[stream].users != 0)
1564                         continue;
1565
1566                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1567                         continue;
1568
1569                 soc_pcm_close(be_substream);
1570                 be_substream->runtime = NULL;
1571                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1572         }
1573 }
1574
1575 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1576 {
1577         struct snd_soc_dpcm *dpcm;
1578         int err, count = 0;
1579
1580         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1581         for_each_dpcm_be(fe, stream, dpcm) {
1582
1583                 struct snd_soc_pcm_runtime *be = dpcm->be;
1584                 struct snd_pcm_substream *be_substream =
1585                         snd_soc_dpcm_get_substream(be, stream);
1586
1587                 if (!be_substream) {
1588                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1589                                 stream ? "capture" : "playback");
1590                         continue;
1591                 }
1592
1593                 /* is this op for this BE ? */
1594                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1595                         continue;
1596
1597                 /* first time the dpcm is open ? */
1598                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1599                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1600                                 stream ? "capture" : "playback",
1601                                 be->dpcm[stream].state);
1602
1603                 if (be->dpcm[stream].users++ != 0)
1604                         continue;
1605
1606                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1607                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1608                         continue;
1609
1610                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1611                         stream ? "capture" : "playback", be->dai_link->name);
1612
1613                 be_substream->runtime = be->dpcm[stream].runtime;
1614                 err = soc_pcm_open(be_substream);
1615                 if (err < 0) {
1616                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1617                         be->dpcm[stream].users--;
1618                         if (be->dpcm[stream].users < 0)
1619                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1620                                         stream ? "capture" : "playback",
1621                                         be->dpcm[stream].state);
1622
1623                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1624                         goto unwind;
1625                 }
1626
1627                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1628                 count++;
1629         }
1630
1631         return count;
1632
1633 unwind:
1634         /* disable any enabled and non active backends */
1635         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1636                 struct snd_soc_pcm_runtime *be = dpcm->be;
1637                 struct snd_pcm_substream *be_substream =
1638                         snd_soc_dpcm_get_substream(be, stream);
1639
1640                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1641                         continue;
1642
1643                 if (be->dpcm[stream].users == 0)
1644                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1645                                 stream ? "capture" : "playback",
1646                                 be->dpcm[stream].state);
1647
1648                 if (--be->dpcm[stream].users != 0)
1649                         continue;
1650
1651                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1652                         continue;
1653
1654                 soc_pcm_close(be_substream);
1655                 be_substream->runtime = NULL;
1656                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1657         }
1658
1659         return err;
1660 }
1661
1662 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1663                                  struct snd_soc_pcm_stream *stream)
1664 {
1665         runtime->hw.rate_min = stream->rate_min;
1666         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1667         runtime->hw.channels_min = stream->channels_min;
1668         runtime->hw.channels_max = stream->channels_max;
1669         if (runtime->hw.formats)
1670                 runtime->hw.formats &= stream->formats;
1671         else
1672                 runtime->hw.formats = stream->formats;
1673         runtime->hw.rates = stream->rates;
1674 }
1675
1676 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1677                                       u64 *formats)
1678 {
1679         struct snd_soc_pcm_runtime *fe = substream->private_data;
1680         struct snd_soc_dpcm *dpcm;
1681         struct snd_soc_dai *dai;
1682         int stream = substream->stream;
1683
1684         if (!fe->dai_link->dpcm_merged_format)
1685                 return;
1686
1687         /*
1688          * It returns merged BE codec format
1689          * if FE want to use it (= dpcm_merged_format)
1690          */
1691
1692         for_each_dpcm_be(fe, stream, dpcm) {
1693                 struct snd_soc_pcm_runtime *be = dpcm->be;
1694                 struct snd_soc_dai_driver *codec_dai_drv;
1695                 struct snd_soc_pcm_stream *codec_stream;
1696                 int i;
1697
1698                 for_each_rtd_codec_dai(be, i, dai) {
1699                         /*
1700                          * Skip CODECs which don't support the current stream
1701                          * type. See soc_pcm_init_runtime_hw() for more details
1702                          */
1703                         if (!snd_soc_dai_stream_valid(dai, stream))
1704                                 continue;
1705
1706                         codec_dai_drv = dai->driver;
1707                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1708                                 codec_stream = &codec_dai_drv->playback;
1709                         else
1710                                 codec_stream = &codec_dai_drv->capture;
1711
1712                         *formats &= codec_stream->formats;
1713                 }
1714         }
1715 }
1716
1717 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1718                                     unsigned int *channels_min,
1719                                     unsigned int *channels_max)
1720 {
1721         struct snd_soc_pcm_runtime *fe = substream->private_data;
1722         struct snd_soc_dpcm *dpcm;
1723         int stream = substream->stream;
1724
1725         if (!fe->dai_link->dpcm_merged_chan)
1726                 return;
1727
1728         /*
1729          * It returns merged BE codec channel;
1730          * if FE want to use it (= dpcm_merged_chan)
1731          */
1732
1733         for_each_dpcm_be(fe, stream, dpcm) {
1734                 struct snd_soc_pcm_runtime *be = dpcm->be;
1735                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1736                 struct snd_soc_dai_driver *codec_dai_drv;
1737                 struct snd_soc_pcm_stream *codec_stream;
1738                 struct snd_soc_pcm_stream *cpu_stream;
1739
1740                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1741                         cpu_stream = &cpu_dai_drv->playback;
1742                 else
1743                         cpu_stream = &cpu_dai_drv->capture;
1744
1745                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1746                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1747
1748                 /*
1749                  * chan min/max cannot be enforced if there are multiple CODEC
1750                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1751                  */
1752                 if (be->num_codecs == 1) {
1753                         codec_dai_drv = be->codec_dais[0]->driver;
1754
1755                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1756                                 codec_stream = &codec_dai_drv->playback;
1757                         else
1758                                 codec_stream = &codec_dai_drv->capture;
1759
1760                         *channels_min = max(*channels_min,
1761                                             codec_stream->channels_min);
1762                         *channels_max = min(*channels_max,
1763                                             codec_stream->channels_max);
1764                 }
1765         }
1766 }
1767
1768 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1769                                     unsigned int *rates,
1770                                     unsigned int *rate_min,
1771                                     unsigned int *rate_max)
1772 {
1773         struct snd_soc_pcm_runtime *fe = substream->private_data;
1774         struct snd_soc_dpcm *dpcm;
1775         int stream = substream->stream;
1776
1777         if (!fe->dai_link->dpcm_merged_rate)
1778                 return;
1779
1780         /*
1781          * It returns merged BE codec channel;
1782          * if FE want to use it (= dpcm_merged_chan)
1783          */
1784
1785         for_each_dpcm_be(fe, stream, dpcm) {
1786                 struct snd_soc_pcm_runtime *be = dpcm->be;
1787                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1788                 struct snd_soc_dai_driver *codec_dai_drv;
1789                 struct snd_soc_pcm_stream *codec_stream;
1790                 struct snd_soc_pcm_stream *cpu_stream;
1791                 struct snd_soc_dai *dai;
1792                 int i;
1793
1794                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1795                         cpu_stream = &cpu_dai_drv->playback;
1796                 else
1797                         cpu_stream = &cpu_dai_drv->capture;
1798
1799                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1800                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1801                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1802
1803                 for_each_rtd_codec_dai(be, i, dai) {
1804                         /*
1805                          * Skip CODECs which don't support the current stream
1806                          * type. See soc_pcm_init_runtime_hw() for more details
1807                          */
1808                         if (!snd_soc_dai_stream_valid(dai, stream))
1809                                 continue;
1810
1811                         codec_dai_drv = dai->driver;
1812                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1813                                 codec_stream = &codec_dai_drv->playback;
1814                         else
1815                                 codec_stream = &codec_dai_drv->capture;
1816
1817                         *rate_min = max(*rate_min, codec_stream->rate_min);
1818                         *rate_max = min_not_zero(*rate_max,
1819                                                  codec_stream->rate_max);
1820                         *rates = snd_pcm_rate_mask_intersect(*rates,
1821                                                 codec_stream->rates);
1822                 }
1823         }
1824 }
1825
1826 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1827 {
1828         struct snd_pcm_runtime *runtime = substream->runtime;
1829         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1830         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1831         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1832
1833         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1834                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1835         else
1836                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1837
1838         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1839         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1840                                 &runtime->hw.channels_max);
1841         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1842                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1843 }
1844
1845 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1846
1847 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1848  * for avoiding the race with trigger callback.
1849  * If the state is unset and a trigger is pending while the previous operation,
1850  * process the pending trigger action here.
1851  */
1852 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1853                                      int stream, enum snd_soc_dpcm_update state)
1854 {
1855         struct snd_pcm_substream *substream =
1856                 snd_soc_dpcm_get_substream(fe, stream);
1857
1858         snd_pcm_stream_lock_irq(substream);
1859         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1860                 dpcm_fe_dai_do_trigger(substream,
1861                                        fe->dpcm[stream].trigger_pending - 1);
1862                 fe->dpcm[stream].trigger_pending = 0;
1863         }
1864         fe->dpcm[stream].runtime_update = state;
1865         snd_pcm_stream_unlock_irq(substream);
1866 }
1867
1868 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1869                                int stream)
1870 {
1871         struct snd_soc_dpcm *dpcm;
1872         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1873         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1874         int err;
1875
1876         /* apply symmetry for FE */
1877         if (soc_pcm_has_symmetry(fe_substream))
1878                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1879
1880         /* Symmetry only applies if we've got an active stream. */
1881         if (fe_cpu_dai->active) {
1882                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1883                 if (err < 0)
1884                         return err;
1885         }
1886
1887         /* apply symmetry for BE */
1888         for_each_dpcm_be(fe, stream, dpcm) {
1889                 struct snd_soc_pcm_runtime *be = dpcm->be;
1890                 struct snd_pcm_substream *be_substream =
1891                         snd_soc_dpcm_get_substream(be, stream);
1892                 struct snd_soc_pcm_runtime *rtd;
1893                 struct snd_soc_dai *codec_dai;
1894                 int i;
1895
1896                 /* A backend may not have the requested substream */
1897                 if (!be_substream)
1898                         continue;
1899
1900                 rtd = be_substream->private_data;
1901                 if (rtd->dai_link->be_hw_params_fixup)
1902                         continue;
1903
1904                 if (soc_pcm_has_symmetry(be_substream))
1905                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1906
1907                 /* Symmetry only applies if we've got an active stream. */
1908                 if (rtd->cpu_dai->active) {
1909                         err = soc_pcm_apply_symmetry(fe_substream,
1910                                                      rtd->cpu_dai);
1911                         if (err < 0)
1912                                 return err;
1913                 }
1914
1915                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1916                         if (codec_dai->active) {
1917                                 err = soc_pcm_apply_symmetry(fe_substream,
1918                                                              codec_dai);
1919                                 if (err < 0)
1920                                         return err;
1921                         }
1922                 }
1923         }
1924
1925         return 0;
1926 }
1927
1928 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1929 {
1930         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1931         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1932         int stream = fe_substream->stream, ret = 0;
1933
1934         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1935
1936         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1937         if (ret < 0) {
1938                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1939                 goto be_err;
1940         }
1941
1942         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1943
1944         /* start the DAI frontend */
1945         ret = soc_pcm_open(fe_substream);
1946         if (ret < 0) {
1947                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1948                 goto unwind;
1949         }
1950
1951         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1952
1953         dpcm_set_fe_runtime(fe_substream);
1954         snd_pcm_limit_hw_rates(runtime);
1955
1956         ret = dpcm_apply_symmetry(fe_substream, stream);
1957         if (ret < 0) {
1958                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1959                         ret);
1960                 goto unwind;
1961         }
1962
1963         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1964         return 0;
1965
1966 unwind:
1967         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1968 be_err:
1969         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1970         return ret;
1971 }
1972
1973 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1974 {
1975         struct snd_soc_dpcm *dpcm;
1976
1977         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1978         for_each_dpcm_be(fe, stream, dpcm) {
1979
1980                 struct snd_soc_pcm_runtime *be = dpcm->be;
1981                 struct snd_pcm_substream *be_substream =
1982                         snd_soc_dpcm_get_substream(be, stream);
1983
1984                 /* is this op for this BE ? */
1985                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1986                         continue;
1987
1988                 if (be->dpcm[stream].users == 0)
1989                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1990                                 stream ? "capture" : "playback",
1991                                 be->dpcm[stream].state);
1992
1993                 if (--be->dpcm[stream].users != 0)
1994                         continue;
1995
1996                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1997                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1998                         soc_pcm_hw_free(be_substream);
1999                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2000                 }
2001
2002                 dev_dbg(be->dev, "ASoC: close BE %s\n",
2003                         be->dai_link->name);
2004
2005                 soc_pcm_close(be_substream);
2006                 be_substream->runtime = NULL;
2007
2008                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2009         }
2010         return 0;
2011 }
2012
2013 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2014 {
2015         struct snd_soc_pcm_runtime *fe = substream->private_data;
2016         int stream = substream->stream;
2017
2018         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2019
2020         /* shutdown the BEs */
2021         dpcm_be_dai_shutdown(fe, substream->stream);
2022
2023         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2024
2025         /* now shutdown the frontend */
2026         soc_pcm_close(substream);
2027
2028         /* run the stream event for each BE */
2029         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2030
2031         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2032         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2033         return 0;
2034 }
2035
2036 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2037 {
2038         struct snd_soc_dpcm *dpcm;
2039
2040         /* only hw_params backends that are either sinks or sources
2041          * to this frontend DAI */
2042         for_each_dpcm_be(fe, stream, dpcm) {
2043
2044                 struct snd_soc_pcm_runtime *be = dpcm->be;
2045                 struct snd_pcm_substream *be_substream =
2046                         snd_soc_dpcm_get_substream(be, stream);
2047
2048                 /* is this op for this BE ? */
2049                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2050                         continue;
2051
2052                 /* only free hw when no longer used - check all FEs */
2053                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2054                                 continue;
2055
2056                 /* do not free hw if this BE is used by other FE */
2057                 if (be->dpcm[stream].users > 1)
2058                         continue;
2059
2060                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2061                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2062                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2063                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2064                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2065                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2066                         continue;
2067
2068                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2069                         be->dai_link->name);
2070
2071                 soc_pcm_hw_free(be_substream);
2072
2073                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2074         }
2075
2076         return 0;
2077 }
2078
2079 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2080 {
2081         struct snd_soc_pcm_runtime *fe = substream->private_data;
2082         int err, stream = substream->stream;
2083
2084         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2085         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2086
2087         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2088
2089         /* call hw_free on the frontend */
2090         err = soc_pcm_hw_free(substream);
2091         if (err < 0)
2092                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2093                         fe->dai_link->name);
2094
2095         /* only hw_params backends that are either sinks or sources
2096          * to this frontend DAI */
2097         err = dpcm_be_dai_hw_free(fe, stream);
2098
2099         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2100         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2101
2102         mutex_unlock(&fe->card->mutex);
2103         return 0;
2104 }
2105
2106 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2107 {
2108         struct snd_soc_dpcm *dpcm;
2109         int ret;
2110
2111         for_each_dpcm_be(fe, stream, dpcm) {
2112
2113                 struct snd_soc_pcm_runtime *be = dpcm->be;
2114                 struct snd_pcm_substream *be_substream =
2115                         snd_soc_dpcm_get_substream(be, stream);
2116
2117                 /* is this op for this BE ? */
2118                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2119                         continue;
2120
2121                 /* copy params for each dpcm */
2122                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2123                                 sizeof(struct snd_pcm_hw_params));
2124
2125                 /* perform any hw_params fixups */
2126                 if (be->dai_link->be_hw_params_fixup) {
2127                         ret = be->dai_link->be_hw_params_fixup(be,
2128                                         &dpcm->hw_params);
2129                         if (ret < 0) {
2130                                 dev_err(be->dev,
2131                                         "ASoC: hw_params BE fixup failed %d\n",
2132                                         ret);
2133                                 goto unwind;
2134                         }
2135                 }
2136
2137                 /* copy the fixed-up hw params for BE dai */
2138                 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2139                        sizeof(struct snd_pcm_hw_params));
2140
2141                 /* only allow hw_params() if no connected FEs are running */
2142                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2143                         continue;
2144
2145                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2146                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2147                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2148                         continue;
2149
2150                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2151                         be->dai_link->name);
2152
2153                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2154                 if (ret < 0) {
2155                         dev_err(dpcm->be->dev,
2156                                 "ASoC: hw_params BE failed %d\n", ret);
2157                         goto unwind;
2158                 }
2159
2160                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2161         }
2162         return 0;
2163
2164 unwind:
2165         /* disable any enabled and non active backends */
2166         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2167                 struct snd_soc_pcm_runtime *be = dpcm->be;
2168                 struct snd_pcm_substream *be_substream =
2169                         snd_soc_dpcm_get_substream(be, stream);
2170
2171                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2172                         continue;
2173
2174                 /* only allow hw_free() if no connected FEs are running */
2175                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2176                         continue;
2177
2178                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2179                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2180                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2181                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2182                         continue;
2183
2184                 soc_pcm_hw_free(be_substream);
2185         }
2186
2187         return ret;
2188 }
2189
2190 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2191                                  struct snd_pcm_hw_params *params)
2192 {
2193         struct snd_soc_pcm_runtime *fe = substream->private_data;
2194         int ret, stream = substream->stream;
2195
2196         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2197         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2198
2199         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2200                         sizeof(struct snd_pcm_hw_params));
2201         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2202         if (ret < 0) {
2203                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2204                 goto out;
2205         }
2206
2207         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2208                         fe->dai_link->name, params_rate(params),
2209                         params_channels(params), params_format(params));
2210
2211         /* call hw_params on the frontend */
2212         ret = soc_pcm_hw_params(substream, params);
2213         if (ret < 0) {
2214                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2215                 dpcm_be_dai_hw_free(fe, stream);
2216          } else
2217                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2218
2219 out:
2220         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2221         mutex_unlock(&fe->card->mutex);
2222         return ret;
2223 }
2224
2225 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2226                 struct snd_pcm_substream *substream, int cmd)
2227 {
2228         int ret;
2229
2230         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2231                         dpcm->be->dai_link->name, cmd);
2232
2233         ret = soc_pcm_trigger(substream, cmd);
2234         if (ret < 0)
2235                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2236
2237         return ret;
2238 }
2239
2240 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2241                                int cmd)
2242 {
2243         struct snd_soc_dpcm *dpcm;
2244         int ret = 0;
2245
2246         for_each_dpcm_be(fe, stream, dpcm) {
2247
2248                 struct snd_soc_pcm_runtime *be = dpcm->be;
2249                 struct snd_pcm_substream *be_substream =
2250                         snd_soc_dpcm_get_substream(be, stream);
2251
2252                 /* is this op for this BE ? */
2253                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2254                         continue;
2255
2256                 switch (cmd) {
2257                 case SNDRV_PCM_TRIGGER_START:
2258                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2259                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2260                                 continue;
2261
2262                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2263                         if (ret)
2264                                 return ret;
2265
2266                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2267                         break;
2268                 case SNDRV_PCM_TRIGGER_RESUME:
2269                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2270                                 continue;
2271
2272                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2273                         if (ret)
2274                                 return ret;
2275
2276                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2277                         break;
2278                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2279                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2280                                 continue;
2281
2282                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2283                         if (ret)
2284                                 return ret;
2285
2286                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2287                         break;
2288                 case SNDRV_PCM_TRIGGER_STOP:
2289                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2290                                 continue;
2291
2292                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
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_STOP;
2300                         break;
2301                 case SNDRV_PCM_TRIGGER_SUSPEND:
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_SUSPEND;
2313                         break;
2314                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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_PAUSED;
2326                         break;
2327                 }
2328         }
2329
2330         return ret;
2331 }
2332 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2333
2334 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2335                                   int cmd, bool fe_first)
2336 {
2337         struct snd_soc_pcm_runtime *fe = substream->private_data;
2338         int ret;
2339
2340         /* call trigger on the frontend before the backend. */
2341         if (fe_first) {
2342                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2343                         fe->dai_link->name, cmd);
2344
2345                 ret = soc_pcm_trigger(substream, cmd);
2346                 if (ret < 0)
2347                         return ret;
2348
2349                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2350                 return ret;
2351         }
2352
2353         /* call trigger on the frontend after the backend. */
2354         ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2355         if (ret < 0)
2356                 return ret;
2357
2358         dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2359                 fe->dai_link->name, cmd);
2360
2361         ret = soc_pcm_trigger(substream, cmd);
2362
2363         return ret;
2364 }
2365
2366 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2367 {
2368         struct snd_soc_pcm_runtime *fe = substream->private_data;
2369         int stream = substream->stream;
2370         int ret = 0;
2371         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2372
2373         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2374
2375         switch (trigger) {
2376         case SND_SOC_DPCM_TRIGGER_PRE:
2377                 switch (cmd) {
2378                 case SNDRV_PCM_TRIGGER_START:
2379                 case SNDRV_PCM_TRIGGER_RESUME:
2380                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2381                         ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2382                         break;
2383                 case SNDRV_PCM_TRIGGER_STOP:
2384                 case SNDRV_PCM_TRIGGER_SUSPEND:
2385                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2386                         ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2387                         break;
2388                 default:
2389                         ret = -EINVAL;
2390                         break;
2391                 }
2392                 break;
2393         case SND_SOC_DPCM_TRIGGER_POST:
2394                 switch (cmd) {
2395                 case SNDRV_PCM_TRIGGER_START:
2396                 case SNDRV_PCM_TRIGGER_RESUME:
2397                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2398                         ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2399                         break;
2400                 case SNDRV_PCM_TRIGGER_STOP:
2401                 case SNDRV_PCM_TRIGGER_SUSPEND:
2402                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2403                         ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2404                         break;
2405                 default:
2406                         ret = -EINVAL;
2407                         break;
2408                 }
2409                 break;
2410         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2411                 /* bespoke trigger() - handles both FE and BEs */
2412
2413                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2414                                 fe->dai_link->name, cmd);
2415
2416                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2417                 break;
2418         default:
2419                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2420                                 fe->dai_link->name);
2421                 ret = -EINVAL;
2422                 goto out;
2423         }
2424
2425         if (ret < 0) {
2426                 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2427                         cmd, ret);
2428                 goto out;
2429         }
2430
2431         switch (cmd) {
2432         case SNDRV_PCM_TRIGGER_START:
2433         case SNDRV_PCM_TRIGGER_RESUME:
2434         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2435                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2436                 break;
2437         case SNDRV_PCM_TRIGGER_STOP:
2438         case SNDRV_PCM_TRIGGER_SUSPEND:
2439                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2440                 break;
2441         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2442                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2443                 break;
2444         }
2445
2446 out:
2447         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2448         return ret;
2449 }
2450
2451 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2452 {
2453         struct snd_soc_pcm_runtime *fe = substream->private_data;
2454         int stream = substream->stream;
2455
2456         /* if FE's runtime_update is already set, we're in race;
2457          * process this trigger later at exit
2458          */
2459         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2460                 fe->dpcm[stream].trigger_pending = cmd + 1;
2461                 return 0; /* delayed, assuming it's successful */
2462         }
2463
2464         /* we're alone, let's trigger */
2465         return dpcm_fe_dai_do_trigger(substream, cmd);
2466 }
2467
2468 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2469 {
2470         struct snd_soc_dpcm *dpcm;
2471         int ret = 0;
2472
2473         for_each_dpcm_be(fe, stream, dpcm) {
2474
2475                 struct snd_soc_pcm_runtime *be = dpcm->be;
2476                 struct snd_pcm_substream *be_substream =
2477                         snd_soc_dpcm_get_substream(be, stream);
2478
2479                 /* is this op for this BE ? */
2480                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2481                         continue;
2482
2483                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2484                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2485                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2486                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2487                         continue;
2488
2489                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2490                         be->dai_link->name);
2491
2492                 ret = soc_pcm_prepare(be_substream);
2493                 if (ret < 0) {
2494                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2495                                 ret);
2496                         break;
2497                 }
2498
2499                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2500         }
2501         return ret;
2502 }
2503
2504 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2505 {
2506         struct snd_soc_pcm_runtime *fe = substream->private_data;
2507         int stream = substream->stream, ret = 0;
2508
2509         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2510
2511         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2512
2513         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2514
2515         /* there is no point preparing this FE if there are no BEs */
2516         if (list_empty(&fe->dpcm[stream].be_clients)) {
2517                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2518                                 fe->dai_link->name);
2519                 ret = -EINVAL;
2520                 goto out;
2521         }
2522
2523         ret = dpcm_be_dai_prepare(fe, substream->stream);
2524         if (ret < 0)
2525                 goto out;
2526
2527         /* call prepare on the frontend */
2528         ret = soc_pcm_prepare(substream);
2529         if (ret < 0) {
2530                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2531                         fe->dai_link->name);
2532                 goto out;
2533         }
2534
2535         /* run the stream event for each BE */
2536         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2537         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2538
2539 out:
2540         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2541         mutex_unlock(&fe->card->mutex);
2542
2543         return ret;
2544 }
2545
2546 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2547 {
2548         struct snd_pcm_substream *substream =
2549                 snd_soc_dpcm_get_substream(fe, stream);
2550         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2551         int err;
2552
2553         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2554                         stream ? "capture" : "playback", fe->dai_link->name);
2555
2556         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2557                 /* call bespoke trigger - FE takes care of all BE triggers */
2558                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2559                                 fe->dai_link->name);
2560
2561                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2562                 if (err < 0)
2563                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2564         } else {
2565                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2566                         fe->dai_link->name);
2567
2568                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2569                 if (err < 0)
2570                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2571         }
2572
2573         err = dpcm_be_dai_hw_free(fe, stream);
2574         if (err < 0)
2575                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2576
2577         err = dpcm_be_dai_shutdown(fe, stream);
2578         if (err < 0)
2579                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2580
2581         /* run the stream event for each BE */
2582         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2583
2584         return 0;
2585 }
2586
2587 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2588 {
2589         struct snd_pcm_substream *substream =
2590                 snd_soc_dpcm_get_substream(fe, stream);
2591         struct snd_soc_dpcm *dpcm;
2592         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2593         int ret;
2594         unsigned long flags;
2595
2596         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2597                         stream ? "capture" : "playback", fe->dai_link->name);
2598
2599         /* Only start the BE if the FE is ready */
2600         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2601                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2602                 return -EINVAL;
2603
2604         /* startup must always be called for new BEs */
2605         ret = dpcm_be_dai_startup(fe, stream);
2606         if (ret < 0)
2607                 goto disconnect;
2608
2609         /* keep going if FE state is > open */
2610         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2611                 return 0;
2612
2613         ret = dpcm_be_dai_hw_params(fe, stream);
2614         if (ret < 0)
2615                 goto close;
2616
2617         /* keep going if FE state is > hw_params */
2618         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2619                 return 0;
2620
2621
2622         ret = dpcm_be_dai_prepare(fe, stream);
2623         if (ret < 0)
2624                 goto hw_free;
2625
2626         /* run the stream event for each BE */
2627         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2628
2629         /* keep going if FE state is > prepare */
2630         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2631                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2632                 return 0;
2633
2634         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2635                 /* call trigger on the frontend - FE takes care of all BE triggers */
2636                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2637                                 fe->dai_link->name);
2638
2639                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2640                 if (ret < 0) {
2641                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2642                         goto hw_free;
2643                 }
2644         } else {
2645                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2646                         fe->dai_link->name);
2647
2648                 ret = dpcm_be_dai_trigger(fe, stream,
2649                                         SNDRV_PCM_TRIGGER_START);
2650                 if (ret < 0) {
2651                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2652                         goto hw_free;
2653                 }
2654         }
2655
2656         return 0;
2657
2658 hw_free:
2659         dpcm_be_dai_hw_free(fe, stream);
2660 close:
2661         dpcm_be_dai_shutdown(fe, stream);
2662 disconnect:
2663         /* disconnect any non started BEs */
2664         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2665         for_each_dpcm_be(fe, stream, dpcm) {
2666                 struct snd_soc_pcm_runtime *be = dpcm->be;
2667                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2668                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2669         }
2670         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2671
2672         return ret;
2673 }
2674
2675 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2676 {
2677         int ret;
2678
2679         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2680         ret = dpcm_run_update_startup(fe, stream);
2681         if (ret < 0)
2682                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2683         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2684
2685         return ret;
2686 }
2687
2688 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2689 {
2690         int ret;
2691
2692         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2693         ret = dpcm_run_update_shutdown(fe, stream);
2694         if (ret < 0)
2695                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2696         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2697
2698         return ret;
2699 }
2700
2701 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2702 {
2703         struct snd_soc_dapm_widget_list *list;
2704         int count, paths;
2705
2706         if (!fe->dai_link->dynamic)
2707                 return 0;
2708
2709         /* only check active links */
2710         if (!fe->cpu_dai->active)
2711                 return 0;
2712
2713         /* DAPM sync will call this to update DSP paths */
2714         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2715                 new ? "new" : "old", fe->dai_link->name);
2716
2717         /* skip if FE doesn't have playback capability */
2718         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK) ||
2719             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2720                 goto capture;
2721
2722         /* skip if FE isn't currently playing */
2723         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2724                 goto capture;
2725
2726         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2727         if (paths < 0) {
2728                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2729                          fe->dai_link->name,  "playback");
2730                 return paths;
2731         }
2732
2733         /* update any playback paths */
2734         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2735         if (count) {
2736                 if (new)
2737                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2738                 else
2739                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2740
2741                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2742                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2743         }
2744
2745         dpcm_path_put(&list);
2746
2747 capture:
2748         /* skip if FE doesn't have capture capability */
2749         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_CAPTURE) ||
2750             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2751                 return 0;
2752
2753         /* skip if FE isn't currently capturing */
2754         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2755                 return 0;
2756
2757         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2758         if (paths < 0) {
2759                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2760                          fe->dai_link->name,  "capture");
2761                 return paths;
2762         }
2763
2764         /* update any old capture paths */
2765         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2766         if (count) {
2767                 if (new)
2768                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2769                 else
2770                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2771
2772                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2773                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2774         }
2775
2776         dpcm_path_put(&list);
2777
2778         return 0;
2779 }
2780
2781 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2782  * any DAI links.
2783  */
2784 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2785 {
2786         struct snd_soc_pcm_runtime *fe;
2787         int ret = 0;
2788
2789         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2790         /* shutdown all old paths first */
2791         for_each_card_rtds(card, fe) {
2792                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2793                 if (ret)
2794                         goto out;
2795         }
2796
2797         /* bring new paths up */
2798         for_each_card_rtds(card, fe) {
2799                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2800                 if (ret)
2801                         goto out;
2802         }
2803
2804 out:
2805         mutex_unlock(&card->mutex);
2806         return ret;
2807 }
2808 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2809 {
2810         struct snd_soc_dpcm *dpcm;
2811         struct snd_soc_dai *dai;
2812
2813         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2814
2815                 struct snd_soc_pcm_runtime *be = dpcm->be;
2816                 int i;
2817
2818                 if (be->dai_link->ignore_suspend)
2819                         continue;
2820
2821                 for_each_rtd_codec_dai(be, i, dai) {
2822                         struct snd_soc_dai_driver *drv = dai->driver;
2823
2824                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2825                                          be->dai_link->name);
2826
2827                         if (drv->ops && drv->ops->digital_mute &&
2828                                                         dai->playback_active)
2829                                 drv->ops->digital_mute(dai, mute);
2830                 }
2831         }
2832
2833         return 0;
2834 }
2835
2836 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2837 {
2838         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2839         struct snd_soc_dpcm *dpcm;
2840         struct snd_soc_dapm_widget_list *list;
2841         int ret;
2842         int stream = fe_substream->stream;
2843
2844         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2845         fe->dpcm[stream].runtime = fe_substream->runtime;
2846
2847         ret = dpcm_path_get(fe, stream, &list);
2848         if (ret < 0) {
2849                 mutex_unlock(&fe->card->mutex);
2850                 return ret;
2851         } else if (ret == 0) {
2852                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2853                         fe->dai_link->name, stream ? "capture" : "playback");
2854         }
2855
2856         /* calculate valid and active FE <-> BE dpcms */
2857         dpcm_process_paths(fe, stream, &list, 1);
2858
2859         ret = dpcm_fe_dai_startup(fe_substream);
2860         if (ret < 0) {
2861                 /* clean up all links */
2862                 for_each_dpcm_be(fe, stream, dpcm)
2863                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2864
2865                 dpcm_be_disconnect(fe, stream);
2866                 fe->dpcm[stream].runtime = NULL;
2867         }
2868
2869         dpcm_clear_pending_state(fe, stream);
2870         dpcm_path_put(&list);
2871         mutex_unlock(&fe->card->mutex);
2872         return ret;
2873 }
2874
2875 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2876 {
2877         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2878         struct snd_soc_dpcm *dpcm;
2879         int stream = fe_substream->stream, ret;
2880
2881         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2882         ret = dpcm_fe_dai_shutdown(fe_substream);
2883
2884         /* mark FE's links ready to prune */
2885         for_each_dpcm_be(fe, stream, dpcm)
2886                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2887
2888         dpcm_be_disconnect(fe, stream);
2889
2890         fe->dpcm[stream].runtime = NULL;
2891         mutex_unlock(&fe->card->mutex);
2892         return ret;
2893 }
2894
2895 /* create a new pcm */
2896 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2897 {
2898         struct snd_soc_dai *codec_dai;
2899         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2900         struct snd_soc_rtdcom_list *rtdcom;
2901         struct snd_soc_component *component;
2902         struct snd_pcm *pcm;
2903         char new_name[64];
2904         int ret = 0, playback = 0, capture = 0;
2905         int i;
2906
2907         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2908                 playback = rtd->dai_link->dpcm_playback;
2909                 capture = rtd->dai_link->dpcm_capture;
2910         } else {
2911                 /* Adapt stream for codec2codec links */
2912                 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2913                         &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2914                 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2915                         &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2916
2917                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2918                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2919                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
2920                                 playback = 1;
2921                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2922                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
2923                                 capture = 1;
2924                 }
2925
2926                 capture = capture && cpu_capture->channels_min;
2927                 playback = playback && cpu_playback->channels_min;
2928         }
2929
2930         if (rtd->dai_link->playback_only) {
2931                 playback = 1;
2932                 capture = 0;
2933         }
2934
2935         if (rtd->dai_link->capture_only) {
2936                 playback = 0;
2937                 capture = 1;
2938         }
2939
2940         /* create the PCM */
2941         if (rtd->dai_link->params) {
2942                 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2943                          rtd->dai_link->stream_name);
2944
2945                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2946                                            playback, capture, &pcm);
2947         } else if (rtd->dai_link->no_pcm) {
2948                 snprintf(new_name, sizeof(new_name), "(%s)",
2949                         rtd->dai_link->stream_name);
2950
2951                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2952                                 playback, capture, &pcm);
2953         } else {
2954                 if (rtd->dai_link->dynamic)
2955                         snprintf(new_name, sizeof(new_name), "%s (*)",
2956                                 rtd->dai_link->stream_name);
2957                 else
2958                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2959                                 rtd->dai_link->stream_name,
2960                                 (rtd->num_codecs > 1) ?
2961                                 "multicodec" : rtd->codec_dai->name, num);
2962
2963                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2964                         capture, &pcm);
2965         }
2966         if (ret < 0) {
2967                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2968                         rtd->dai_link->name);
2969                 return ret;
2970         }
2971         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2972
2973         /* DAPM dai link stream work */
2974         if (rtd->dai_link->params)
2975                 rtd->close_delayed_work_func = codec2codec_close_delayed_work;
2976         else
2977                 rtd->close_delayed_work_func = close_delayed_work;
2978
2979         pcm->nonatomic = rtd->dai_link->nonatomic;
2980         rtd->pcm = pcm;
2981         pcm->private_data = rtd;
2982
2983         if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2984                 if (playback)
2985                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2986                 if (capture)
2987                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2988                 goto out;
2989         }
2990
2991         /* ASoC PCM operations */
2992         if (rtd->dai_link->dynamic) {
2993                 rtd->ops.open           = dpcm_fe_dai_open;
2994                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
2995                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
2996                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
2997                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
2998                 rtd->ops.close          = dpcm_fe_dai_close;
2999                 rtd->ops.pointer        = soc_pcm_pointer;
3000         } else {
3001                 rtd->ops.open           = soc_pcm_open;
3002                 rtd->ops.hw_params      = soc_pcm_hw_params;
3003                 rtd->ops.prepare        = soc_pcm_prepare;
3004                 rtd->ops.trigger        = soc_pcm_trigger;
3005                 rtd->ops.hw_free        = soc_pcm_hw_free;
3006                 rtd->ops.close          = soc_pcm_close;
3007                 rtd->ops.pointer        = soc_pcm_pointer;
3008         }
3009
3010         for_each_rtd_components(rtd, rtdcom, component) {
3011                 const struct snd_soc_component_driver *drv = component->driver;
3012
3013                 if (drv->ioctl)
3014                         rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
3015                 if (drv->sync_stop)
3016                         rtd->ops.sync_stop      = snd_soc_pcm_component_sync_stop;
3017                 if (drv->copy_user)
3018                         rtd->ops.copy_user      = snd_soc_pcm_component_copy_user;
3019                 if (drv->page)
3020                         rtd->ops.page           = snd_soc_pcm_component_page;
3021                 if (drv->mmap)
3022                         rtd->ops.mmap           = snd_soc_pcm_component_mmap;
3023         }
3024
3025         if (playback)
3026                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3027
3028         if (capture)
3029                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3030
3031         ret = snd_soc_pcm_component_new(rtd);
3032         if (ret < 0) {
3033                 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3034                 return ret;
3035         }
3036
3037         pcm->no_device_suspend = true;
3038 out:
3039         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3040                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3041                  cpu_dai->name);
3042         return ret;
3043 }
3044
3045 /* is the current PCM operation for this FE ? */
3046 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3047 {
3048         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3049                 return 1;
3050         return 0;
3051 }
3052 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3053
3054 /* is the current PCM operation for this BE ? */
3055 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3056                 struct snd_soc_pcm_runtime *be, int stream)
3057 {
3058         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3059            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3060                   be->dpcm[stream].runtime_update))
3061                 return 1;
3062         return 0;
3063 }
3064 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3065
3066 /* get the substream for this BE */
3067 struct snd_pcm_substream *
3068         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3069 {
3070         return be->pcm->streams[stream].substream;
3071 }
3072 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3073
3074 /* get the BE runtime state */
3075 enum snd_soc_dpcm_state
3076         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3077 {
3078         return be->dpcm[stream].state;
3079 }
3080 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3081
3082 /* set the BE runtime state */
3083 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3084                 int stream, enum snd_soc_dpcm_state state)
3085 {
3086         be->dpcm[stream].state = state;
3087 }
3088 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3089
3090 /*
3091  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3092  * are not running, paused or suspended for the specified stream direction.
3093  */
3094 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3095                 struct snd_soc_pcm_runtime *be, int stream)
3096 {
3097         struct snd_soc_dpcm *dpcm;
3098         int state;
3099         int ret = 1;
3100         unsigned long flags;
3101
3102         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3103         for_each_dpcm_fe(be, stream, dpcm) {
3104
3105                 if (dpcm->fe == fe)
3106                         continue;
3107
3108                 state = dpcm->fe->dpcm[stream].state;
3109                 if (state == SND_SOC_DPCM_STATE_START ||
3110                         state == SND_SOC_DPCM_STATE_PAUSED ||
3111                         state == SND_SOC_DPCM_STATE_SUSPEND) {
3112                         ret = 0;
3113                         break;
3114                 }
3115         }
3116         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3117
3118         /* it's safe to free/stop this BE DAI */
3119         return ret;
3120 }
3121 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3122
3123 /*
3124  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3125  * running, paused or suspended for the specified stream direction.
3126  */
3127 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3128                 struct snd_soc_pcm_runtime *be, int stream)
3129 {
3130         struct snd_soc_dpcm *dpcm;
3131         int state;
3132         int ret = 1;
3133         unsigned long flags;
3134
3135         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3136         for_each_dpcm_fe(be, stream, dpcm) {
3137
3138                 if (dpcm->fe == fe)
3139                         continue;
3140
3141                 state = dpcm->fe->dpcm[stream].state;
3142                 if (state == SND_SOC_DPCM_STATE_START ||
3143                         state == SND_SOC_DPCM_STATE_PAUSED ||
3144                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3145                         state == SND_SOC_DPCM_STATE_PREPARE) {
3146                         ret = 0;
3147                         break;
3148                 }
3149         }
3150         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3151
3152         /* it's safe to change hw_params */
3153         return ret;
3154 }
3155 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3156
3157 #ifdef CONFIG_DEBUG_FS
3158 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3159 {
3160         switch (state) {
3161         case SND_SOC_DPCM_STATE_NEW:
3162                 return "new";
3163         case SND_SOC_DPCM_STATE_OPEN:
3164                 return "open";
3165         case SND_SOC_DPCM_STATE_HW_PARAMS:
3166                 return "hw_params";
3167         case SND_SOC_DPCM_STATE_PREPARE:
3168                 return "prepare";
3169         case SND_SOC_DPCM_STATE_START:
3170                 return "start";
3171         case SND_SOC_DPCM_STATE_STOP:
3172                 return "stop";
3173         case SND_SOC_DPCM_STATE_SUSPEND:
3174                 return "suspend";
3175         case SND_SOC_DPCM_STATE_PAUSED:
3176                 return "paused";
3177         case SND_SOC_DPCM_STATE_HW_FREE:
3178                 return "hw_free";
3179         case SND_SOC_DPCM_STATE_CLOSE:
3180                 return "close";
3181         }
3182
3183         return "unknown";
3184 }
3185
3186 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3187                                 int stream, char *buf, size_t size)
3188 {
3189         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3190         struct snd_soc_dpcm *dpcm;
3191         ssize_t offset = 0;
3192         unsigned long flags;
3193
3194         /* FE state */
3195         offset += snprintf(buf + offset, size - offset,
3196                         "[%s - %s]\n", fe->dai_link->name,
3197                         stream ? "Capture" : "Playback");
3198
3199         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3200                         dpcm_state_string(fe->dpcm[stream].state));
3201
3202         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3203             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3204                 offset += snprintf(buf + offset, size - offset,
3205                                 "Hardware Params: "
3206                                 "Format = %s, Channels = %d, Rate = %d\n",
3207                                 snd_pcm_format_name(params_format(params)),
3208                                 params_channels(params),
3209                                 params_rate(params));
3210
3211         /* BEs state */
3212         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3213
3214         if (list_empty(&fe->dpcm[stream].be_clients)) {
3215                 offset += snprintf(buf + offset, size - offset,
3216                                 " No active DSP links\n");
3217                 goto out;
3218         }
3219
3220         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3221         for_each_dpcm_be(fe, stream, dpcm) {
3222                 struct snd_soc_pcm_runtime *be = dpcm->be;
3223                 params = &dpcm->hw_params;
3224
3225                 offset += snprintf(buf + offset, size - offset,
3226                                 "- %s\n", be->dai_link->name);
3227
3228                 offset += snprintf(buf + offset, size - offset,
3229                                 "   State: %s\n",
3230                                 dpcm_state_string(be->dpcm[stream].state));
3231
3232                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3233                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3234                         offset += snprintf(buf + offset, size - offset,
3235                                 "   Hardware Params: "
3236                                 "Format = %s, Channels = %d, Rate = %d\n",
3237                                 snd_pcm_format_name(params_format(params)),
3238                                 params_channels(params),
3239                                 params_rate(params));
3240         }
3241         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3242 out:
3243         return offset;
3244 }
3245
3246 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3247                                 size_t count, loff_t *ppos)
3248 {
3249         struct snd_soc_pcm_runtime *fe = file->private_data;
3250         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3251         char *buf;
3252
3253         buf = kmalloc(out_count, GFP_KERNEL);
3254         if (!buf)
3255                 return -ENOMEM;
3256
3257         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3258                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3259                                         buf + offset, out_count - offset);
3260
3261         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3262                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3263                                         buf + offset, out_count - offset);
3264
3265         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3266
3267         kfree(buf);
3268         return ret;
3269 }
3270
3271 static const struct file_operations dpcm_state_fops = {
3272         .open = simple_open,
3273         .read = dpcm_state_read_file,
3274         .llseek = default_llseek,
3275 };
3276
3277 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3278 {
3279         if (!rtd->dai_link)
3280                 return;
3281
3282         if (!rtd->dai_link->dynamic)
3283                 return;
3284
3285         if (!rtd->card->debugfs_card_root)
3286                 return;
3287
3288         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3289                         rtd->card->debugfs_card_root);
3290
3291         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3292                             rtd, &dpcm_state_fops);
3293 }
3294 #endif