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 work_struct *work)
 641 {
 642         struct snd_soc_pcm_runtime *rtd =
 643                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 644         struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
 645
 646         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 647
 648         dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
 649                  codec_dai->driver->playback.stream_name,
 650                  codec_dai->playback_active ? "active" : "inactive",
 651                  rtd->pop_wait ? "yes" : "no");
 652
 653         /* are we waiting on this codec DAI stream */
 654         if (rtd->pop_wait == 1) {
 655                 rtd->pop_wait = 0;
 656                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 657                                           SND_SOC_DAPM_STREAM_STOP);
 658         }
 659
 660         mutex_unlock(&rtd->card->pcm_mutex);
 661 }
 662
 663 static void codec2codec_close_delayed_work(struct work_struct *work)
 664 {
 665         /*
 666          * Currently nothing to do for c2c links
 667          * Since c2c links are internal nodes in the DAPM graph and
 668          * don't interface with the outside world or application layer
 669          * we don't have to do any special handling on close.
 670          */
 671 }
 672
 673 /*
 674  * Called by ALSA when a PCM substream is closed. Private data can be
 675  * freed here. The cpu DAI, codec DAI, machine and components are also
 676  * shutdown.
 677  */
 678 static int soc_pcm_close(struct snd_pcm_substream *substream)
 679 {
 680         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 681         struct snd_soc_component *component;
 682         struct snd_soc_rtdcom_list *rtdcom;
 683         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 684         struct snd_soc_dai *codec_dai;
 685         int i;
 686
 687         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 688
 689         snd_soc_runtime_deactivate(rtd, substream->stream);
 690
 691         /* clear the corresponding DAIs rate when inactive */
 692         if (!cpu_dai->active)
 693                 cpu_dai->rate = 0;
 694
 695         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 696                 if (!codec_dai->active)
 697                         codec_dai->rate = 0;
 698         }
 699
 700         snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
 701
 702         snd_soc_dai_shutdown(cpu_dai, substream);
 703
 704         for_each_rtd_codec_dai(rtd, i, codec_dai)
 705                 snd_soc_dai_shutdown(codec_dai, substream);
 706
 707         if (rtd->dai_link->ops->shutdown)
 708                 rtd->dai_link->ops->shutdown(substream);
 709
 710         soc_pcm_components_close(substream, NULL);
 711
 712         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 713                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 714                         /* powered down playback stream now */
 715                         snd_soc_dapm_stream_event(rtd,
 716                                                   SNDRV_PCM_STREAM_PLAYBACK,
 717                                                   SND_SOC_DAPM_STREAM_STOP);
 718                 } else {
 719                         /* start delayed pop wq here for playback streams */
 720                         rtd->pop_wait = 1;
 721                         queue_delayed_work(system_power_efficient_wq,
 722                                            &rtd->delayed_work,
 723                                            msecs_to_jiffies(rtd->pmdown_time));
 724                 }
 725         } else {
 726                 /* capture streams can be powered down now */
 727                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 728                                           SND_SOC_DAPM_STREAM_STOP);
 729         }
 730
 731         mutex_unlock(&rtd->card->pcm_mutex);
 732
 733         for_each_rtd_components(rtd, rtdcom, component) {
 734                 pm_runtime_mark_last_busy(component->dev);
 735                 pm_runtime_put_autosuspend(component->dev);
 736         }
 737
 738         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 739                 if (!codec_dai->active)
 740                         pinctrl_pm_select_sleep_state(codec_dai->dev);
 741         }
 742         if (!cpu_dai->active)
 743                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 744
 745         return 0;
 746 }
 747
 748 /*
 749  * Called by ALSA when the PCM substream is prepared, can set format, sample
 750  * rate, etc.  This function is non atomic and can be called multiple times,
 751  * it can refer to the runtime info.
 752  */
 753 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 754 {
 755         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 756         struct snd_soc_component *component;
 757         struct snd_soc_rtdcom_list *rtdcom;
 758         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 759         struct snd_soc_dai *codec_dai;
 760         int i, ret = 0;
 761
 762         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 763
 764         if (rtd->dai_link->ops->prepare) {
 765                 ret = rtd->dai_link->ops->prepare(substream);
 766                 if (ret < 0) {
 767                         dev_err(rtd->card->dev, "ASoC: machine prepare error:"
 768                                 " %d\n", ret);
 769                         goto out;
 770                 }
 771         }
 772
 773         for_each_rtd_components(rtd, rtdcom, component) {
 774                 ret = snd_soc_component_prepare(component, substream);
 775                 if (ret < 0) {
 776                         dev_err(component->dev,
 777                                 "ASoC: platform prepare error: %d\n", ret);
 778                         goto out;
 779                 }
 780         }
 781
 782         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 783                 ret = snd_soc_dai_prepare(codec_dai, substream);
 784                 if (ret < 0) {
 785                         dev_err(codec_dai->dev,
 786                                 "ASoC: codec DAI prepare error: %d\n",
 787                                 ret);
 788                         goto out;
 789                 }
 790         }
 791
 792         ret = snd_soc_dai_prepare(cpu_dai, substream);
 793         if (ret < 0) {
 794                 dev_err(cpu_dai->dev,
 795                         "ASoC: cpu DAI prepare error: %d\n", ret);
 796                 goto out;
 797         }
 798
 799         /* cancel any delayed stream shutdown that is pending */
 800         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 801             rtd->pop_wait) {
 802                 rtd->pop_wait = 0;
 803                 cancel_delayed_work(&rtd->delayed_work);
 804         }
 805
 806         snd_soc_dapm_stream_event(rtd, substream->stream,
 807                         SND_SOC_DAPM_STREAM_START);
 808
 809         for_each_rtd_codec_dai(rtd, i, codec_dai)
 810                 snd_soc_dai_digital_mute(codec_dai, 0,
 811                                          substream->stream);
 812         snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
 813
 814 out:
 815         mutex_unlock(&rtd->card->pcm_mutex);
 816         return ret;
 817 }
 818
 819 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 820                                        unsigned int mask)
 821 {
 822         struct snd_interval *interval;
 823         int channels = hweight_long(mask);
 824
 825         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 826         interval->min = channels;
 827         interval->max = channels;
 828 }
 829
 830 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
 831                                       struct snd_soc_component *last)
 832 {
 833         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 834         struct snd_soc_rtdcom_list *rtdcom;
 835         struct snd_soc_component *component;
 836         int ret = 0;
 837
 838         for_each_rtd_components(rtd, rtdcom, component) {
 839                 if (component == last)
 840                         break;
 841
 842                 ret |= snd_soc_component_hw_free(component, substream);
 843         }
 844
 845         return ret;
 846 }
 847
 848 /*
 849  * Called by ALSA when the hardware params are set by application. This
 850  * function can also be called multiple times and can allocate buffers
 851  * (using snd_pcm_lib_* ). It's non-atomic.
 852  */
 853 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 854                                 struct snd_pcm_hw_params *params)
 855 {
 856         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 857         struct snd_soc_component *component;
 858         struct snd_soc_rtdcom_list *rtdcom;
 859         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 860         struct snd_soc_dai *codec_dai;
 861         int i, ret = 0;
 862
 863         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 864         if (rtd->dai_link->ops->hw_params) {
 865                 ret = rtd->dai_link->ops->hw_params(substream, params);
 866                 if (ret < 0) {
 867                         dev_err(rtd->card->dev, "ASoC: machine hw_params"
 868                                 " failed: %d\n", ret);
 869                         goto out;
 870                 }
 871         }
 872
 873         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 874                 struct snd_pcm_hw_params codec_params;
 875
 876                 /*
 877                  * Skip CODECs which don't support the current stream type,
 878                  * the idea being that if a CODEC is not used for the currently
 879                  * set up transfer direction, it should not need to be
 880                  * configured, especially since the configuration used might
 881                  * not even be supported by that CODEC. There may be cases
 882                  * however where a CODEC needs to be set up although it is
 883                  * actually not being used for the transfer, e.g. if a
 884                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
 885                  * for the DAI link including a playback-only CODEC.
 886                  * If this becomes necessary, we will have to augment the
 887                  * machine driver setup with information on how to act, so
 888                  * we can do the right thing here.
 889                  */
 890                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 891                         continue;
 892
 893                 /* copy params for each codec */
 894                 codec_params = *params;
 895
 896                 /* fixup params based on TDM slot masks */
 897                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 898                     codec_dai->tx_mask)
 899                         soc_pcm_codec_params_fixup(&codec_params,
 900                                                    codec_dai->tx_mask);
 901
 902                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
 903                     codec_dai->rx_mask)
 904                         soc_pcm_codec_params_fixup(&codec_params,
 905                                                    codec_dai->rx_mask);
 906
 907                 ret = snd_soc_dai_hw_params(codec_dai, substream,
 908                                             &codec_params);
 909                 if(ret < 0)
 910                         goto codec_err;
 911
 912                 codec_dai->rate = params_rate(&codec_params);
 913                 codec_dai->channels = params_channels(&codec_params);
 914                 codec_dai->sample_bits = snd_pcm_format_physical_width(
 915                                                 params_format(&codec_params));
 916
 917                 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
 918         }
 919
 920         ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
 921         if (ret < 0)
 922                 goto interface_err;
 923
 924         /* store the parameters for each DAIs */
 925         cpu_dai->rate = params_rate(params);
 926         cpu_dai->channels = params_channels(params);
 927         cpu_dai->sample_bits =
 928                 snd_pcm_format_physical_width(params_format(params));
 929
 930         snd_soc_dapm_update_dai(substream, params, cpu_dai);
 931
 932         for_each_rtd_components(rtd, rtdcom, component) {
 933                 ret = snd_soc_component_hw_params(component, substream, params);
 934                 if (ret < 0) {
 935                         dev_err(component->dev,
 936                                 "ASoC: %s hw params failed: %d\n",
 937                                 component->name, ret);
 938                         goto component_err;
 939                 }
 940         }
 941         component = NULL;
 942
 943         ret = soc_pcm_params_symmetry(substream, params);
 944         if (ret)
 945                 goto component_err;
 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
1186         /* only add new dpcms */
1187         for_each_dpcm_be(fe, stream, dpcm) {
1188                 if (dpcm->be == be && dpcm->fe == fe)
1189                         return 0;
1190         }
1191
1192         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1193         if (!dpcm)
1194                 return -ENOMEM;
1195
1196         dpcm->be = be;
1197         dpcm->fe = fe;
1198         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1199         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1200         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1201         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1202         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1203         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1204
1205         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1206                         stream ? "capture" : "playback",  fe->dai_link->name,
1207                         stream ? "<-" : "->", be->dai_link->name);
1208
1209 #ifdef CONFIG_DEBUG_FS
1210         dpcm->debugfs_state = debugfs_create_dir(be->dai_link->name,
1211                                                  fe->debugfs_dpcm_root);
1212         debugfs_create_u32("state", 0644, dpcm->debugfs_state, &dpcm->state);
1213 #endif
1214         return 1;
1215 }
1216
1217 /* reparent a BE onto another FE */
1218 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1219                         struct snd_soc_pcm_runtime *be, int stream)
1220 {
1221         struct snd_soc_dpcm *dpcm;
1222         struct snd_pcm_substream *fe_substream, *be_substream;
1223
1224         /* reparent if BE is connected to other FEs */
1225         if (!be->dpcm[stream].users)
1226                 return;
1227
1228         be_substream = snd_soc_dpcm_get_substream(be, stream);
1229
1230         for_each_dpcm_fe(be, stream, dpcm) {
1231                 if (dpcm->fe == fe)
1232                         continue;
1233
1234                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1235                         stream ? "capture" : "playback",
1236                         dpcm->fe->dai_link->name,
1237                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1238
1239                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1240                 be_substream->runtime = fe_substream->runtime;
1241                 break;
1242         }
1243 }
1244
1245 /* disconnect a BE and FE */
1246 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1247 {
1248         struct snd_soc_dpcm *dpcm, *d;
1249         unsigned long flags;
1250
1251         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1252                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1253                                 stream ? "capture" : "playback",
1254                                 dpcm->be->dai_link->name);
1255
1256                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1257                         continue;
1258
1259                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1260                         stream ? "capture" : "playback", fe->dai_link->name,
1261                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1262
1263                 /* BEs still alive need new FE */
1264                 dpcm_be_reparent(fe, dpcm->be, stream);
1265
1266 #ifdef CONFIG_DEBUG_FS
1267                 debugfs_remove_recursive(dpcm->debugfs_state);
1268 #endif
1269                 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1270                 list_del(&dpcm->list_be);
1271                 list_del(&dpcm->list_fe);
1272                 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1273                 kfree(dpcm);
1274         }
1275 }
1276
1277 /* get BE for DAI widget and stream */
1278 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1279                 struct snd_soc_dapm_widget *widget, int stream)
1280 {
1281         struct snd_soc_pcm_runtime *be;
1282         struct snd_soc_dai *dai;
1283         int i;
1284
1285         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1286
1287         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1288                 for_each_card_rtds(card, be) {
1289
1290                         if (!be->dai_link->no_pcm)
1291                                 continue;
1292
1293                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1294                                 be->cpu_dai->playback_widget ?
1295                                 be->cpu_dai->playback_widget->name : "(not set)");
1296
1297                         if (be->cpu_dai->playback_widget == widget)
1298                                 return be;
1299
1300                         for_each_rtd_codec_dai(be, i, dai) {
1301                                 if (dai->playback_widget == widget)
1302                                         return be;
1303                         }
1304                 }
1305         } else {
1306
1307                 for_each_card_rtds(card, be) {
1308
1309                         if (!be->dai_link->no_pcm)
1310                                 continue;
1311
1312                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1313                                 be->cpu_dai->capture_widget ?
1314                                 be->cpu_dai->capture_widget->name : "(not set)");
1315
1316                         if (be->cpu_dai->capture_widget == widget)
1317                                 return be;
1318
1319                         for_each_rtd_codec_dai(be, i, dai) {
1320                                 if (dai->capture_widget == widget)
1321                                         return be;
1322                         }
1323                 }
1324         }
1325
1326         /* dai link name and stream name set correctly ? */
1327         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1328                 stream ? "capture" : "playback", widget->name);
1329         return NULL;
1330 }
1331
1332 static inline struct snd_soc_dapm_widget *
1333         dai_get_widget(struct snd_soc_dai *dai, int stream)
1334 {
1335         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1336                 return dai->playback_widget;
1337         else
1338                 return dai->capture_widget;
1339 }
1340
1341 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1342                 struct snd_soc_dapm_widget *widget)
1343 {
1344         int i;
1345
1346         for (i = 0; i < list->num_widgets; i++) {
1347                 if (widget == list->widgets[i])
1348                         return 1;
1349         }
1350
1351         return 0;
1352 }
1353
1354 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1355                 enum snd_soc_dapm_direction dir)
1356 {
1357         struct snd_soc_card *card = widget->dapm->card;
1358         struct snd_soc_pcm_runtime *rtd;
1359         struct snd_soc_dai *dai;
1360         int i;
1361
1362         if (dir == SND_SOC_DAPM_DIR_OUT) {
1363                 for_each_card_rtds(card, rtd) {
1364                         if (!rtd->dai_link->no_pcm)
1365                                 continue;
1366
1367                         if (rtd->cpu_dai->playback_widget == widget)
1368                                 return true;
1369
1370                         for_each_rtd_codec_dai(rtd, i, dai) {
1371                                 if (dai->playback_widget == widget)
1372                                         return true;
1373                         }
1374                 }
1375         } else { /* SND_SOC_DAPM_DIR_IN */
1376                 for_each_card_rtds(card, rtd) {
1377                         if (!rtd->dai_link->no_pcm)
1378                                 continue;
1379
1380                         if (rtd->cpu_dai->capture_widget == widget)
1381                                 return true;
1382
1383                         for_each_rtd_codec_dai(rtd, i, dai) {
1384                                 if (dai->capture_widget == widget)
1385                                         return true;
1386                         }
1387                 }
1388         }
1389
1390         return false;
1391 }
1392
1393 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1394         int stream, struct snd_soc_dapm_widget_list **list)
1395 {
1396         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1397         int paths;
1398
1399         /* get number of valid DAI paths and their widgets */
1400         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1401                         dpcm_end_walk_at_be);
1402
1403         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1404                         stream ? "capture" : "playback");
1405
1406         return paths;
1407 }
1408
1409 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1410         struct snd_soc_dapm_widget_list **list_)
1411 {
1412         struct snd_soc_dpcm *dpcm;
1413         struct snd_soc_dapm_widget_list *list = *list_;
1414         struct snd_soc_dapm_widget *widget;
1415         struct snd_soc_dai *dai;
1416         int prune = 0;
1417         int do_prune;
1418
1419         /* Destroy any old FE <--> BE connections */
1420         for_each_dpcm_be(fe, stream, dpcm) {
1421                 unsigned int i;
1422
1423                 /* is there a valid CPU DAI widget for this BE */
1424                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1425
1426                 /* prune the BE if it's no longer in our active list */
1427                 if (widget && widget_in_list(list, widget))
1428                         continue;
1429
1430                 /* is there a valid CODEC DAI widget for this BE */
1431                 do_prune = 1;
1432                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1433                         widget = dai_get_widget(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                                 do_prune = 0;
1438                 }
1439                 if (!do_prune)
1440                         continue;
1441
1442                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1443                         stream ? "capture" : "playback",
1444                         dpcm->be->dai_link->name, fe->dai_link->name);
1445                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1446                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1447                 prune++;
1448         }
1449
1450         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1451         return prune;
1452 }
1453
1454 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1455         struct snd_soc_dapm_widget_list **list_)
1456 {
1457         struct snd_soc_card *card = fe->card;
1458         struct snd_soc_dapm_widget_list *list = *list_;
1459         struct snd_soc_pcm_runtime *be;
1460         int i, new = 0, err;
1461
1462         /* Create any new FE <--> BE connections */
1463         for (i = 0; i < list->num_widgets; i++) {
1464
1465                 switch (list->widgets[i]->id) {
1466                 case snd_soc_dapm_dai_in:
1467                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1468                                 continue;
1469                         break;
1470                 case snd_soc_dapm_dai_out:
1471                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1472                                 continue;
1473                         break;
1474                 default:
1475                         continue;
1476                 }
1477
1478                 /* is there a valid BE rtd for this widget */
1479                 be = dpcm_get_be(card, list->widgets[i], stream);
1480                 if (!be) {
1481                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1482                                         list->widgets[i]->name);
1483                         continue;
1484                 }
1485
1486                 /* make sure BE is a real BE */
1487                 if (!be->dai_link->no_pcm)
1488                         continue;
1489
1490                 /* don't connect if FE is not running */
1491                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1492                         continue;
1493
1494                 /* newly connected FE and BE */
1495                 err = dpcm_be_connect(fe, be, stream);
1496                 if (err < 0) {
1497                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1498                                 list->widgets[i]->name);
1499                         break;
1500                 } else if (err == 0) /* already connected */
1501                         continue;
1502
1503                 /* new */
1504                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1505                 new++;
1506         }
1507
1508         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1509         return new;
1510 }
1511
1512 /*
1513  * Find the corresponding BE DAIs that source or sink audio to this
1514  * FE substream.
1515  */
1516 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1517         int stream, struct snd_soc_dapm_widget_list **list, int new)
1518 {
1519         if (new)
1520                 return dpcm_add_paths(fe, stream, list);
1521         else
1522                 return dpcm_prune_paths(fe, stream, list);
1523 }
1524
1525 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1526 {
1527         struct snd_soc_dpcm *dpcm;
1528         unsigned long flags;
1529
1530         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1531         for_each_dpcm_be(fe, stream, dpcm)
1532                 dpcm->be->dpcm[stream].runtime_update =
1533                                                 SND_SOC_DPCM_UPDATE_NO;
1534         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1535 }
1536
1537 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1538         int stream)
1539 {
1540         struct snd_soc_dpcm *dpcm;
1541
1542         /* disable any enabled and non active backends */
1543         for_each_dpcm_be(fe, stream, dpcm) {
1544
1545                 struct snd_soc_pcm_runtime *be = dpcm->be;
1546                 struct snd_pcm_substream *be_substream =
1547                         snd_soc_dpcm_get_substream(be, stream);
1548
1549                 if (be->dpcm[stream].users == 0)
1550                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1551                                 stream ? "capture" : "playback",
1552                                 be->dpcm[stream].state);
1553
1554                 if (--be->dpcm[stream].users != 0)
1555                         continue;
1556
1557                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1558                         continue;
1559
1560                 soc_pcm_close(be_substream);
1561                 be_substream->runtime = NULL;
1562                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1563         }
1564 }
1565
1566 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1567 {
1568         struct snd_soc_dpcm *dpcm;
1569         int err, count = 0;
1570
1571         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1572         for_each_dpcm_be(fe, stream, dpcm) {
1573
1574                 struct snd_soc_pcm_runtime *be = dpcm->be;
1575                 struct snd_pcm_substream *be_substream =
1576                         snd_soc_dpcm_get_substream(be, stream);
1577
1578                 if (!be_substream) {
1579                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1580                                 stream ? "capture" : "playback");
1581                         continue;
1582                 }
1583
1584                 /* is this op for this BE ? */
1585                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1586                         continue;
1587
1588                 /* first time the dpcm is open ? */
1589                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1590                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1591                                 stream ? "capture" : "playback",
1592                                 be->dpcm[stream].state);
1593
1594                 if (be->dpcm[stream].users++ != 0)
1595                         continue;
1596
1597                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1598                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1599                         continue;
1600
1601                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1602                         stream ? "capture" : "playback", be->dai_link->name);
1603
1604                 be_substream->runtime = be->dpcm[stream].runtime;
1605                 err = soc_pcm_open(be_substream);
1606                 if (err < 0) {
1607                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1608                         be->dpcm[stream].users--;
1609                         if (be->dpcm[stream].users < 0)
1610                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1611                                         stream ? "capture" : "playback",
1612                                         be->dpcm[stream].state);
1613
1614                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1615                         goto unwind;
1616                 }
1617
1618                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1619                 count++;
1620         }
1621
1622         return count;
1623
1624 unwind:
1625         /* disable any enabled and non active backends */
1626         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1627                 struct snd_soc_pcm_runtime *be = dpcm->be;
1628                 struct snd_pcm_substream *be_substream =
1629                         snd_soc_dpcm_get_substream(be, stream);
1630
1631                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1632                         continue;
1633
1634                 if (be->dpcm[stream].users == 0)
1635                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1636                                 stream ? "capture" : "playback",
1637                                 be->dpcm[stream].state);
1638
1639                 if (--be->dpcm[stream].users != 0)
1640                         continue;
1641
1642                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1643                         continue;
1644
1645                 soc_pcm_close(be_substream);
1646                 be_substream->runtime = NULL;
1647                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1648         }
1649
1650         return err;
1651 }
1652
1653 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1654                                  struct snd_soc_pcm_stream *stream)
1655 {
1656         runtime->hw.rate_min = stream->rate_min;
1657         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1658         runtime->hw.channels_min = stream->channels_min;
1659         runtime->hw.channels_max = stream->channels_max;
1660         if (runtime->hw.formats)
1661                 runtime->hw.formats &= stream->formats;
1662         else
1663                 runtime->hw.formats = stream->formats;
1664         runtime->hw.rates = stream->rates;
1665 }
1666
1667 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1668                                       u64 *formats)
1669 {
1670         struct snd_soc_pcm_runtime *fe = substream->private_data;
1671         struct snd_soc_dpcm *dpcm;
1672         struct snd_soc_dai *dai;
1673         int stream = substream->stream;
1674
1675         if (!fe->dai_link->dpcm_merged_format)
1676                 return;
1677
1678         /*
1679          * It returns merged BE codec format
1680          * if FE want to use it (= dpcm_merged_format)
1681          */
1682
1683         for_each_dpcm_be(fe, stream, dpcm) {
1684                 struct snd_soc_pcm_runtime *be = dpcm->be;
1685                 struct snd_soc_dai_driver *codec_dai_drv;
1686                 struct snd_soc_pcm_stream *codec_stream;
1687                 int i;
1688
1689                 for_each_rtd_codec_dai(be, i, dai) {
1690                         /*
1691                          * Skip CODECs which don't support the current stream
1692                          * type. See soc_pcm_init_runtime_hw() for more details
1693                          */
1694                         if (!snd_soc_dai_stream_valid(dai, stream))
1695                                 continue;
1696
1697                         codec_dai_drv = dai->driver;
1698                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1699                                 codec_stream = &codec_dai_drv->playback;
1700                         else
1701                                 codec_stream = &codec_dai_drv->capture;
1702
1703                         *formats &= codec_stream->formats;
1704                 }
1705         }
1706 }
1707
1708 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1709                                     unsigned int *channels_min,
1710                                     unsigned int *channels_max)
1711 {
1712         struct snd_soc_pcm_runtime *fe = substream->private_data;
1713         struct snd_soc_dpcm *dpcm;
1714         int stream = substream->stream;
1715
1716         if (!fe->dai_link->dpcm_merged_chan)
1717                 return;
1718
1719         /*
1720          * It returns merged BE codec channel;
1721          * if FE want to use it (= dpcm_merged_chan)
1722          */
1723
1724         for_each_dpcm_be(fe, stream, dpcm) {
1725                 struct snd_soc_pcm_runtime *be = dpcm->be;
1726                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1727                 struct snd_soc_dai_driver *codec_dai_drv;
1728                 struct snd_soc_pcm_stream *codec_stream;
1729                 struct snd_soc_pcm_stream *cpu_stream;
1730
1731                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1732                         cpu_stream = &cpu_dai_drv->playback;
1733                 else
1734                         cpu_stream = &cpu_dai_drv->capture;
1735
1736                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1737                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1738
1739                 /*
1740                  * chan min/max cannot be enforced if there are multiple CODEC
1741                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1742                  */
1743                 if (be->num_codecs == 1) {
1744                         codec_dai_drv = be->codec_dais[0]->driver;
1745
1746                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1747                                 codec_stream = &codec_dai_drv->playback;
1748                         else
1749                                 codec_stream = &codec_dai_drv->capture;
1750
1751                         *channels_min = max(*channels_min,
1752                                             codec_stream->channels_min);
1753                         *channels_max = min(*channels_max,
1754                                             codec_stream->channels_max);
1755                 }
1756         }
1757 }
1758
1759 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1760                                     unsigned int *rates,
1761                                     unsigned int *rate_min,
1762                                     unsigned int *rate_max)
1763 {
1764         struct snd_soc_pcm_runtime *fe = substream->private_data;
1765         struct snd_soc_dpcm *dpcm;
1766         int stream = substream->stream;
1767
1768         if (!fe->dai_link->dpcm_merged_rate)
1769                 return;
1770
1771         /*
1772          * It returns merged BE codec channel;
1773          * if FE want to use it (= dpcm_merged_chan)
1774          */
1775
1776         for_each_dpcm_be(fe, stream, dpcm) {
1777                 struct snd_soc_pcm_runtime *be = dpcm->be;
1778                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1779                 struct snd_soc_dai_driver *codec_dai_drv;
1780                 struct snd_soc_pcm_stream *codec_stream;
1781                 struct snd_soc_pcm_stream *cpu_stream;
1782                 struct snd_soc_dai *dai;
1783                 int i;
1784
1785                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1786                         cpu_stream = &cpu_dai_drv->playback;
1787                 else
1788                         cpu_stream = &cpu_dai_drv->capture;
1789
1790                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1791                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1792                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1793
1794                 for_each_rtd_codec_dai(be, i, dai) {
1795                         /*
1796                          * Skip CODECs which don't support the current stream
1797                          * type. See soc_pcm_init_runtime_hw() for more details
1798                          */
1799                         if (!snd_soc_dai_stream_valid(dai, stream))
1800                                 continue;
1801
1802                         codec_dai_drv = dai->driver;
1803                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1804                                 codec_stream = &codec_dai_drv->playback;
1805                         else
1806                                 codec_stream = &codec_dai_drv->capture;
1807
1808                         *rate_min = max(*rate_min, codec_stream->rate_min);
1809                         *rate_max = min_not_zero(*rate_max,
1810                                                  codec_stream->rate_max);
1811                         *rates = snd_pcm_rate_mask_intersect(*rates,
1812                                                 codec_stream->rates);
1813                 }
1814         }
1815 }
1816
1817 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1818 {
1819         struct snd_pcm_runtime *runtime = substream->runtime;
1820         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1821         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1822         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1823
1824         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1825                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1826         else
1827                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1828
1829         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1830         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1831                                 &runtime->hw.channels_max);
1832         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1833                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1834 }
1835
1836 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1837
1838 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1839  * for avoiding the race with trigger callback.
1840  * If the state is unset and a trigger is pending while the previous operation,
1841  * process the pending trigger action here.
1842  */
1843 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1844                                      int stream, enum snd_soc_dpcm_update state)
1845 {
1846         struct snd_pcm_substream *substream =
1847                 snd_soc_dpcm_get_substream(fe, stream);
1848
1849         snd_pcm_stream_lock_irq(substream);
1850         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1851                 dpcm_fe_dai_do_trigger(substream,
1852                                        fe->dpcm[stream].trigger_pending - 1);
1853                 fe->dpcm[stream].trigger_pending = 0;
1854         }
1855         fe->dpcm[stream].runtime_update = state;
1856         snd_pcm_stream_unlock_irq(substream);
1857 }
1858
1859 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1860                                int stream)
1861 {
1862         struct snd_soc_dpcm *dpcm;
1863         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1864         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1865         int err;
1866
1867         /* apply symmetry for FE */
1868         if (soc_pcm_has_symmetry(fe_substream))
1869                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1870
1871         /* Symmetry only applies if we've got an active stream. */
1872         if (fe_cpu_dai->active) {
1873                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1874                 if (err < 0)
1875                         return err;
1876         }
1877
1878         /* apply symmetry for BE */
1879         for_each_dpcm_be(fe, stream, dpcm) {
1880                 struct snd_soc_pcm_runtime *be = dpcm->be;
1881                 struct snd_pcm_substream *be_substream =
1882                         snd_soc_dpcm_get_substream(be, stream);
1883                 struct snd_soc_pcm_runtime *rtd;
1884                 struct snd_soc_dai *codec_dai;
1885                 int i;
1886
1887                 /* A backend may not have the requested substream */
1888                 if (!be_substream)
1889                         continue;
1890
1891                 rtd = be_substream->private_data;
1892                 if (rtd->dai_link->be_hw_params_fixup)
1893                         continue;
1894
1895                 if (soc_pcm_has_symmetry(be_substream))
1896                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1897
1898                 /* Symmetry only applies if we've got an active stream. */
1899                 if (rtd->cpu_dai->active) {
1900                         err = soc_pcm_apply_symmetry(fe_substream,
1901                                                      rtd->cpu_dai);
1902                         if (err < 0)
1903                                 return err;
1904                 }
1905
1906                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1907                         if (codec_dai->active) {
1908                                 err = soc_pcm_apply_symmetry(fe_substream,
1909                                                              codec_dai);
1910                                 if (err < 0)
1911                                         return err;
1912                         }
1913                 }
1914         }
1915
1916         return 0;
1917 }
1918
1919 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1920 {
1921         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1922         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1923         int stream = fe_substream->stream, ret = 0;
1924
1925         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1926
1927         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1928         if (ret < 0) {
1929                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1930                 goto be_err;
1931         }
1932
1933         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1934
1935         /* start the DAI frontend */
1936         ret = soc_pcm_open(fe_substream);
1937         if (ret < 0) {
1938                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1939                 goto unwind;
1940         }
1941
1942         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1943
1944         dpcm_set_fe_runtime(fe_substream);
1945         snd_pcm_limit_hw_rates(runtime);
1946
1947         ret = dpcm_apply_symmetry(fe_substream, stream);
1948         if (ret < 0) {
1949                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1950                         ret);
1951                 goto unwind;
1952         }
1953
1954         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1955         return 0;
1956
1957 unwind:
1958         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1959 be_err:
1960         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1961         return ret;
1962 }
1963
1964 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1965 {
1966         struct snd_soc_dpcm *dpcm;
1967
1968         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1969         for_each_dpcm_be(fe, stream, dpcm) {
1970
1971                 struct snd_soc_pcm_runtime *be = dpcm->be;
1972                 struct snd_pcm_substream *be_substream =
1973                         snd_soc_dpcm_get_substream(be, stream);
1974
1975                 /* is this op for this BE ? */
1976                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1977                         continue;
1978
1979                 if (be->dpcm[stream].users == 0)
1980                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1981                                 stream ? "capture" : "playback",
1982                                 be->dpcm[stream].state);
1983
1984                 if (--be->dpcm[stream].users != 0)
1985                         continue;
1986
1987                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1988                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1989                         soc_pcm_hw_free(be_substream);
1990                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1991                 }
1992
1993                 dev_dbg(be->dev, "ASoC: close BE %s\n",
1994                         be->dai_link->name);
1995
1996                 soc_pcm_close(be_substream);
1997                 be_substream->runtime = NULL;
1998
1999                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2000         }
2001         return 0;
2002 }
2003
2004 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2005 {
2006         struct snd_soc_pcm_runtime *fe = substream->private_data;
2007         int stream = substream->stream;
2008
2009         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2010
2011         /* shutdown the BEs */
2012         dpcm_be_dai_shutdown(fe, substream->stream);
2013
2014         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2015
2016         /* now shutdown the frontend */
2017         soc_pcm_close(substream);
2018
2019         /* run the stream event for each BE */
2020         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2021
2022         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2023         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2024         return 0;
2025 }
2026
2027 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2028 {
2029         struct snd_soc_dpcm *dpcm;
2030
2031         /* only hw_params backends that are either sinks or sources
2032          * to this frontend DAI */
2033         for_each_dpcm_be(fe, stream, dpcm) {
2034
2035                 struct snd_soc_pcm_runtime *be = dpcm->be;
2036                 struct snd_pcm_substream *be_substream =
2037                         snd_soc_dpcm_get_substream(be, stream);
2038
2039                 /* is this op for this BE ? */
2040                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2041                         continue;
2042
2043                 /* only free hw when no longer used - check all FEs */
2044                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2045                                 continue;
2046
2047                 /* do not free hw if this BE is used by other FE */
2048                 if (be->dpcm[stream].users > 1)
2049                         continue;
2050
2051                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2052                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2053                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2054                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2055                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2056                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2057                         continue;
2058
2059                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2060                         be->dai_link->name);
2061
2062                 soc_pcm_hw_free(be_substream);
2063
2064                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2065         }
2066
2067         return 0;
2068 }
2069
2070 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2071 {
2072         struct snd_soc_pcm_runtime *fe = substream->private_data;
2073         int err, stream = substream->stream;
2074
2075         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2076         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2077
2078         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2079
2080         /* call hw_free on the frontend */
2081         err = soc_pcm_hw_free(substream);
2082         if (err < 0)
2083                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2084                         fe->dai_link->name);
2085
2086         /* only hw_params backends that are either sinks or sources
2087          * to this frontend DAI */
2088         err = dpcm_be_dai_hw_free(fe, stream);
2089
2090         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2091         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2092
2093         mutex_unlock(&fe->card->mutex);
2094         return 0;
2095 }
2096
2097 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2098 {
2099         struct snd_soc_dpcm *dpcm;
2100         int ret;
2101
2102         for_each_dpcm_be(fe, stream, dpcm) {
2103
2104                 struct snd_soc_pcm_runtime *be = dpcm->be;
2105                 struct snd_pcm_substream *be_substream =
2106                         snd_soc_dpcm_get_substream(be, stream);
2107
2108                 /* is this op for this BE ? */
2109                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2110                         continue;
2111
2112                 /* copy params for each dpcm */
2113                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2114                                 sizeof(struct snd_pcm_hw_params));
2115
2116                 /* perform any hw_params fixups */
2117                 if (be->dai_link->be_hw_params_fixup) {
2118                         ret = be->dai_link->be_hw_params_fixup(be,
2119                                         &dpcm->hw_params);
2120                         if (ret < 0) {
2121                                 dev_err(be->dev,
2122                                         "ASoC: hw_params BE fixup failed %d\n",
2123                                         ret);
2124                                 goto unwind;
2125                         }
2126                 }
2127
2128                 /* copy the fixed-up hw params for BE dai */
2129                 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2130                        sizeof(struct snd_pcm_hw_params));
2131
2132                 /* only allow hw_params() if no connected FEs are running */
2133                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2134                         continue;
2135
2136                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2137                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2138                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2139                         continue;
2140
2141                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2142                         be->dai_link->name);
2143
2144                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2145                 if (ret < 0) {
2146                         dev_err(dpcm->be->dev,
2147                                 "ASoC: hw_params BE failed %d\n", ret);
2148                         goto unwind;
2149                 }
2150
2151                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2152         }
2153         return 0;
2154
2155 unwind:
2156         /* disable any enabled and non active backends */
2157         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2158                 struct snd_soc_pcm_runtime *be = dpcm->be;
2159                 struct snd_pcm_substream *be_substream =
2160                         snd_soc_dpcm_get_substream(be, stream);
2161
2162                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2163                         continue;
2164
2165                 /* only allow hw_free() if no connected FEs are running */
2166                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2167                         continue;
2168
2169                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2170                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2171                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2172                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2173                         continue;
2174
2175                 soc_pcm_hw_free(be_substream);
2176         }
2177
2178         return ret;
2179 }
2180
2181 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2182                                  struct snd_pcm_hw_params *params)
2183 {
2184         struct snd_soc_pcm_runtime *fe = substream->private_data;
2185         int ret, stream = substream->stream;
2186
2187         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2188         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2189
2190         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2191                         sizeof(struct snd_pcm_hw_params));
2192         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2193         if (ret < 0) {
2194                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2195                 goto out;
2196         }
2197
2198         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2199                         fe->dai_link->name, params_rate(params),
2200                         params_channels(params), params_format(params));
2201
2202         /* call hw_params on the frontend */
2203         ret = soc_pcm_hw_params(substream, params);
2204         if (ret < 0) {
2205                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2206                 dpcm_be_dai_hw_free(fe, stream);
2207          } else
2208                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2209
2210 out:
2211         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2212         mutex_unlock(&fe->card->mutex);
2213         return ret;
2214 }
2215
2216 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2217                 struct snd_pcm_substream *substream, int cmd)
2218 {
2219         int ret;
2220
2221         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2222                         dpcm->be->dai_link->name, cmd);
2223
2224         ret = soc_pcm_trigger(substream, cmd);
2225         if (ret < 0)
2226                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2227
2228         return ret;
2229 }
2230
2231 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2232                                int cmd)
2233 {
2234         struct snd_soc_dpcm *dpcm;
2235         int ret = 0;
2236
2237         for_each_dpcm_be(fe, stream, dpcm) {
2238
2239                 struct snd_soc_pcm_runtime *be = dpcm->be;
2240                 struct snd_pcm_substream *be_substream =
2241                         snd_soc_dpcm_get_substream(be, stream);
2242
2243                 /* is this op for this BE ? */
2244                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2245                         continue;
2246
2247                 switch (cmd) {
2248                 case SNDRV_PCM_TRIGGER_START:
2249                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2250                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2251                                 continue;
2252
2253                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2254                         if (ret)
2255                                 return ret;
2256
2257                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2258                         break;
2259                 case SNDRV_PCM_TRIGGER_RESUME:
2260                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2261                                 continue;
2262
2263                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2264                         if (ret)
2265                                 return ret;
2266
2267                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2268                         break;
2269                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2270                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2271                                 continue;
2272
2273                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2274                         if (ret)
2275                                 return ret;
2276
2277                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2278                         break;
2279                 case SNDRV_PCM_TRIGGER_STOP:
2280                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2281                                 continue;
2282
2283                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2284                                 continue;
2285
2286                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2287                         if (ret)
2288                                 return ret;
2289
2290                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2291                         break;
2292                 case SNDRV_PCM_TRIGGER_SUSPEND:
2293                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2294                                 continue;
2295
2296                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2297                                 continue;
2298
2299                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2300                         if (ret)
2301                                 return ret;
2302
2303                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2304                         break;
2305                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2306                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2307                                 continue;
2308
2309                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2310                                 continue;
2311
2312                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2313                         if (ret)
2314                                 return ret;
2315
2316                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2317                         break;
2318                 }
2319         }
2320
2321         return ret;
2322 }
2323 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2324
2325 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2326 {
2327         struct snd_soc_pcm_runtime *fe = substream->private_data;
2328         int stream = substream->stream, ret;
2329         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2330
2331         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2332
2333         switch (trigger) {
2334         case SND_SOC_DPCM_TRIGGER_PRE:
2335                 /* call trigger on the frontend before the backend. */
2336
2337                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2338                                 fe->dai_link->name, cmd);
2339
2340                 ret = soc_pcm_trigger(substream, cmd);
2341                 if (ret < 0) {
2342                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2343                         goto out;
2344                 }
2345
2346                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2347                 break;
2348         case SND_SOC_DPCM_TRIGGER_POST:
2349                 /* call trigger on the frontend after the backend. */
2350
2351                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2352                 if (ret < 0) {
2353                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2354                         goto out;
2355                 }
2356
2357                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2358                                 fe->dai_link->name, cmd);
2359
2360                 ret = soc_pcm_trigger(substream, cmd);
2361                 break;
2362         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2363                 /* bespoke trigger() - handles both FE and BEs */
2364
2365                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2366                                 fe->dai_link->name, cmd);
2367
2368                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2369                 if (ret < 0) {
2370                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2371                         goto out;
2372                 }
2373                 break;
2374         default:
2375                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2376                                 fe->dai_link->name);
2377                 ret = -EINVAL;
2378                 goto out;
2379         }
2380
2381         switch (cmd) {
2382         case SNDRV_PCM_TRIGGER_START:
2383         case SNDRV_PCM_TRIGGER_RESUME:
2384         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2385                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2386                 break;
2387         case SNDRV_PCM_TRIGGER_STOP:
2388         case SNDRV_PCM_TRIGGER_SUSPEND:
2389                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2390                 break;
2391         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2392                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2393                 break;
2394         }
2395
2396 out:
2397         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2398         return ret;
2399 }
2400
2401 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2402 {
2403         struct snd_soc_pcm_runtime *fe = substream->private_data;
2404         int stream = substream->stream;
2405
2406         /* if FE's runtime_update is already set, we're in race;
2407          * process this trigger later at exit
2408          */
2409         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2410                 fe->dpcm[stream].trigger_pending = cmd + 1;
2411                 return 0; /* delayed, assuming it's successful */
2412         }
2413
2414         /* we're alone, let's trigger */
2415         return dpcm_fe_dai_do_trigger(substream, cmd);
2416 }
2417
2418 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2419 {
2420         struct snd_soc_dpcm *dpcm;
2421         int ret = 0;
2422
2423         for_each_dpcm_be(fe, stream, dpcm) {
2424
2425                 struct snd_soc_pcm_runtime *be = dpcm->be;
2426                 struct snd_pcm_substream *be_substream =
2427                         snd_soc_dpcm_get_substream(be, stream);
2428
2429                 /* is this op for this BE ? */
2430                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2431                         continue;
2432
2433                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2434                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2435                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2436                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2437                         continue;
2438
2439                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2440                         be->dai_link->name);
2441
2442                 ret = soc_pcm_prepare(be_substream);
2443                 if (ret < 0) {
2444                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2445                                 ret);
2446                         break;
2447                 }
2448
2449                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2450         }
2451         return ret;
2452 }
2453
2454 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2455 {
2456         struct snd_soc_pcm_runtime *fe = substream->private_data;
2457         int stream = substream->stream, ret = 0;
2458
2459         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2460
2461         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2462
2463         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2464
2465         /* there is no point preparing this FE if there are no BEs */
2466         if (list_empty(&fe->dpcm[stream].be_clients)) {
2467                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2468                                 fe->dai_link->name);
2469                 ret = -EINVAL;
2470                 goto out;
2471         }
2472
2473         ret = dpcm_be_dai_prepare(fe, substream->stream);
2474         if (ret < 0)
2475                 goto out;
2476
2477         /* call prepare on the frontend */
2478         ret = soc_pcm_prepare(substream);
2479         if (ret < 0) {
2480                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2481                         fe->dai_link->name);
2482                 goto out;
2483         }
2484
2485         /* run the stream event for each BE */
2486         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2487         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2488
2489 out:
2490         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2491         mutex_unlock(&fe->card->mutex);
2492
2493         return ret;
2494 }
2495
2496 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2497 {
2498         struct snd_pcm_substream *substream =
2499                 snd_soc_dpcm_get_substream(fe, stream);
2500         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2501         int err;
2502
2503         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2504                         stream ? "capture" : "playback", fe->dai_link->name);
2505
2506         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2507                 /* call bespoke trigger - FE takes care of all BE triggers */
2508                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2509                                 fe->dai_link->name);
2510
2511                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2512                 if (err < 0)
2513                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2514         } else {
2515                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2516                         fe->dai_link->name);
2517
2518                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2519                 if (err < 0)
2520                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2521         }
2522
2523         err = dpcm_be_dai_hw_free(fe, stream);
2524         if (err < 0)
2525                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2526
2527         err = dpcm_be_dai_shutdown(fe, stream);
2528         if (err < 0)
2529                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2530
2531         /* run the stream event for each BE */
2532         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2533
2534         return 0;
2535 }
2536
2537 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2538 {
2539         struct snd_pcm_substream *substream =
2540                 snd_soc_dpcm_get_substream(fe, stream);
2541         struct snd_soc_dpcm *dpcm;
2542         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2543         int ret;
2544         unsigned long flags;
2545
2546         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2547                         stream ? "capture" : "playback", fe->dai_link->name);
2548
2549         /* Only start the BE if the FE is ready */
2550         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2551                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2552                 return -EINVAL;
2553
2554         /* startup must always be called for new BEs */
2555         ret = dpcm_be_dai_startup(fe, stream);
2556         if (ret < 0)
2557                 goto disconnect;
2558
2559         /* keep going if FE state is > open */
2560         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2561                 return 0;
2562
2563         ret = dpcm_be_dai_hw_params(fe, stream);
2564         if (ret < 0)
2565                 goto close;
2566
2567         /* keep going if FE state is > hw_params */
2568         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2569                 return 0;
2570
2571
2572         ret = dpcm_be_dai_prepare(fe, stream);
2573         if (ret < 0)
2574                 goto hw_free;
2575
2576         /* run the stream event for each BE */
2577         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2578
2579         /* keep going if FE state is > prepare */
2580         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2581                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2582                 return 0;
2583
2584         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2585                 /* call trigger on the frontend - FE takes care of all BE triggers */
2586                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2587                                 fe->dai_link->name);
2588
2589                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2590                 if (ret < 0) {
2591                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2592                         goto hw_free;
2593                 }
2594         } else {
2595                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2596                         fe->dai_link->name);
2597
2598                 ret = dpcm_be_dai_trigger(fe, stream,
2599                                         SNDRV_PCM_TRIGGER_START);
2600                 if (ret < 0) {
2601                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2602                         goto hw_free;
2603                 }
2604         }
2605
2606         return 0;
2607
2608 hw_free:
2609         dpcm_be_dai_hw_free(fe, stream);
2610 close:
2611         dpcm_be_dai_shutdown(fe, stream);
2612 disconnect:
2613         /* disconnect any non started BEs */
2614         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2615         for_each_dpcm_be(fe, stream, dpcm) {
2616                 struct snd_soc_pcm_runtime *be = dpcm->be;
2617                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2618                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2619         }
2620         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2621
2622         return ret;
2623 }
2624
2625 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2626 {
2627         int ret;
2628
2629         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2630         ret = dpcm_run_update_startup(fe, stream);
2631         if (ret < 0)
2632                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2633         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2634
2635         return ret;
2636 }
2637
2638 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2639 {
2640         int ret;
2641
2642         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2643         ret = dpcm_run_update_shutdown(fe, stream);
2644         if (ret < 0)
2645                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2646         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2647
2648         return ret;
2649 }
2650
2651 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2652 {
2653         struct snd_soc_dapm_widget_list *list;
2654         int count, paths;
2655
2656         if (!fe->dai_link->dynamic)
2657                 return 0;
2658
2659         /* only check active links */
2660         if (!fe->cpu_dai->active)
2661                 return 0;
2662
2663         /* DAPM sync will call this to update DSP paths */
2664         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2665                 new ? "new" : "old", fe->dai_link->name);
2666
2667         /* skip if FE doesn't have playback capability */
2668         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK) ||
2669             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2670                 goto capture;
2671
2672         /* skip if FE isn't currently playing */
2673         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2674                 goto capture;
2675
2676         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2677         if (paths < 0) {
2678                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2679                          fe->dai_link->name,  "playback");
2680                 return paths;
2681         }
2682
2683         /* update any playback paths */
2684         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2685         if (count) {
2686                 if (new)
2687                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2688                 else
2689                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2690
2691                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2692                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2693         }
2694
2695         dpcm_path_put(&list);
2696
2697 capture:
2698         /* skip if FE doesn't have capture capability */
2699         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_CAPTURE) ||
2700             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2701                 return 0;
2702
2703         /* skip if FE isn't currently capturing */
2704         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2705                 return 0;
2706
2707         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2708         if (paths < 0) {
2709                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2710                          fe->dai_link->name,  "capture");
2711                 return paths;
2712         }
2713
2714         /* update any old capture paths */
2715         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2716         if (count) {
2717                 if (new)
2718                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2719                 else
2720                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2721
2722                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2723                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2724         }
2725
2726         dpcm_path_put(&list);
2727
2728         return 0;
2729 }
2730
2731 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2732  * any DAI links.
2733  */
2734 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2735 {
2736         struct snd_soc_pcm_runtime *fe;
2737         int ret = 0;
2738
2739         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2740         /* shutdown all old paths first */
2741         for_each_card_rtds(card, fe) {
2742                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2743                 if (ret)
2744                         goto out;
2745         }
2746
2747         /* bring new paths up */
2748         for_each_card_rtds(card, fe) {
2749                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2750                 if (ret)
2751                         goto out;
2752         }
2753
2754 out:
2755         mutex_unlock(&card->mutex);
2756         return ret;
2757 }
2758 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2759 {
2760         struct snd_soc_dpcm *dpcm;
2761         struct snd_soc_dai *dai;
2762
2763         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2764
2765                 struct snd_soc_pcm_runtime *be = dpcm->be;
2766                 int i;
2767
2768                 if (be->dai_link->ignore_suspend)
2769                         continue;
2770
2771                 for_each_rtd_codec_dai(be, i, dai) {
2772                         struct snd_soc_dai_driver *drv = dai->driver;
2773
2774                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2775                                          be->dai_link->name);
2776
2777                         if (drv->ops && drv->ops->digital_mute &&
2778                                                         dai->playback_active)
2779                                 drv->ops->digital_mute(dai, mute);
2780                 }
2781         }
2782
2783         return 0;
2784 }
2785
2786 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2787 {
2788         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2789         struct snd_soc_dpcm *dpcm;
2790         struct snd_soc_dapm_widget_list *list;
2791         int ret;
2792         int stream = fe_substream->stream;
2793
2794         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2795         fe->dpcm[stream].runtime = fe_substream->runtime;
2796
2797         ret = dpcm_path_get(fe, stream, &list);
2798         if (ret < 0) {
2799                 mutex_unlock(&fe->card->mutex);
2800                 return ret;
2801         } else if (ret == 0) {
2802                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2803                         fe->dai_link->name, stream ? "capture" : "playback");
2804         }
2805
2806         /* calculate valid and active FE <-> BE dpcms */
2807         dpcm_process_paths(fe, stream, &list, 1);
2808
2809         ret = dpcm_fe_dai_startup(fe_substream);
2810         if (ret < 0) {
2811                 /* clean up all links */
2812                 for_each_dpcm_be(fe, stream, dpcm)
2813                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2814
2815                 dpcm_be_disconnect(fe, stream);
2816                 fe->dpcm[stream].runtime = NULL;
2817         }
2818
2819         dpcm_clear_pending_state(fe, stream);
2820         dpcm_path_put(&list);
2821         mutex_unlock(&fe->card->mutex);
2822         return ret;
2823 }
2824
2825 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2826 {
2827         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2828         struct snd_soc_dpcm *dpcm;
2829         int stream = fe_substream->stream, ret;
2830
2831         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2832         ret = dpcm_fe_dai_shutdown(fe_substream);
2833
2834         /* mark FE's links ready to prune */
2835         for_each_dpcm_be(fe, stream, dpcm)
2836                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2837
2838         dpcm_be_disconnect(fe, stream);
2839
2840         fe->dpcm[stream].runtime = NULL;
2841         mutex_unlock(&fe->card->mutex);
2842         return ret;
2843 }
2844
2845 static void soc_pcm_private_free(struct snd_pcm *pcm)
2846 {
2847         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2848
2849         /* need to sync the delayed work before releasing resources */
2850         flush_delayed_work(&rtd->delayed_work);
2851         snd_soc_pcm_component_free(pcm);
2852 }
2853
2854 /* create a new pcm */
2855 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2856 {
2857         struct snd_soc_dai *codec_dai;
2858         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2859         struct snd_soc_rtdcom_list *rtdcom;
2860         struct snd_soc_component *component;
2861         struct snd_pcm *pcm;
2862         char new_name[64];
2863         int ret = 0, playback = 0, capture = 0;
2864         int i;
2865
2866         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2867                 playback = rtd->dai_link->dpcm_playback;
2868                 capture = rtd->dai_link->dpcm_capture;
2869         } else {
2870                 /* Adapt stream for codec2codec links */
2871                 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2872                         &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2873                 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2874                         &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2875
2876                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2877                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2878                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
2879                                 playback = 1;
2880                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2881                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
2882                                 capture = 1;
2883                 }
2884
2885                 capture = capture && cpu_capture->channels_min;
2886                 playback = playback && cpu_playback->channels_min;
2887         }
2888
2889         if (rtd->dai_link->playback_only) {
2890                 playback = 1;
2891                 capture = 0;
2892         }
2893
2894         if (rtd->dai_link->capture_only) {
2895                 playback = 0;
2896                 capture = 1;
2897         }
2898
2899         /* create the PCM */
2900         if (rtd->dai_link->params) {
2901                 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2902                          rtd->dai_link->stream_name);
2903
2904                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2905                                            playback, capture, &pcm);
2906         } else if (rtd->dai_link->no_pcm) {
2907                 snprintf(new_name, sizeof(new_name), "(%s)",
2908                         rtd->dai_link->stream_name);
2909
2910                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2911                                 playback, capture, &pcm);
2912         } else {
2913                 if (rtd->dai_link->dynamic)
2914                         snprintf(new_name, sizeof(new_name), "%s (*)",
2915                                 rtd->dai_link->stream_name);
2916                 else
2917                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2918                                 rtd->dai_link->stream_name,
2919                                 (rtd->num_codecs > 1) ?
2920                                 "multicodec" : rtd->codec_dai->name, num);
2921
2922                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2923                         capture, &pcm);
2924         }
2925         if (ret < 0) {
2926                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2927                         rtd->dai_link->name);
2928                 return ret;
2929         }
2930         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2931
2932         /* DAPM dai link stream work */
2933         if (rtd->dai_link->params)
2934                 INIT_DELAYED_WORK(&rtd->delayed_work,
2935                                   codec2codec_close_delayed_work);
2936         else
2937                 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2938
2939         pcm->nonatomic = rtd->dai_link->nonatomic;
2940         rtd->pcm = pcm;
2941         pcm->private_data = rtd;
2942
2943         if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2944                 if (playback)
2945                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2946                 if (capture)
2947                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2948                 goto out;
2949         }
2950
2951         /* ASoC PCM operations */
2952         if (rtd->dai_link->dynamic) {
2953                 rtd->ops.open           = dpcm_fe_dai_open;
2954                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
2955                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
2956                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
2957                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
2958                 rtd->ops.close          = dpcm_fe_dai_close;
2959                 rtd->ops.pointer        = soc_pcm_pointer;
2960                 rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2961         } else {
2962                 rtd->ops.open           = soc_pcm_open;
2963                 rtd->ops.hw_params      = soc_pcm_hw_params;
2964                 rtd->ops.prepare        = soc_pcm_prepare;
2965                 rtd->ops.trigger        = soc_pcm_trigger;
2966                 rtd->ops.hw_free        = soc_pcm_hw_free;
2967                 rtd->ops.close          = soc_pcm_close;
2968                 rtd->ops.pointer        = soc_pcm_pointer;
2969                 rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2970         }
2971
2972         for_each_rtd_components(rtd, rtdcom, component) {
2973                 const struct snd_soc_component_driver *drv = component->driver;
2974
2975                 if (drv->copy_user)
2976                         rtd->ops.copy_user      = snd_soc_pcm_component_copy_user;
2977                 if (drv->page)
2978                         rtd->ops.page           = snd_soc_pcm_component_page;
2979                 if (drv->mmap)
2980                         rtd->ops.mmap           = snd_soc_pcm_component_mmap;
2981         }
2982
2983         if (playback)
2984                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2985
2986         if (capture)
2987                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2988
2989         ret = snd_soc_pcm_component_new(pcm);
2990         if (ret < 0) {
2991                 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
2992                 return ret;
2993         }
2994
2995         pcm->private_free = soc_pcm_private_free;
2996         pcm->no_device_suspend = true;
2997 out:
2998         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2999                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3000                  cpu_dai->name);
3001         return ret;
3002 }
3003
3004 /* is the current PCM operation for this FE ? */
3005 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3006 {
3007         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3008                 return 1;
3009         return 0;
3010 }
3011 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3012
3013 /* is the current PCM operation for this BE ? */
3014 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3015                 struct snd_soc_pcm_runtime *be, int stream)
3016 {
3017         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3018            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3019                   be->dpcm[stream].runtime_update))
3020                 return 1;
3021         return 0;
3022 }
3023 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3024
3025 /* get the substream for this BE */
3026 struct snd_pcm_substream *
3027         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3028 {
3029         return be->pcm->streams[stream].substream;
3030 }
3031 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3032
3033 /* get the BE runtime state */
3034 enum snd_soc_dpcm_state
3035         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3036 {
3037         return be->dpcm[stream].state;
3038 }
3039 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3040
3041 /* set the BE runtime state */
3042 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3043                 int stream, enum snd_soc_dpcm_state state)
3044 {
3045         be->dpcm[stream].state = state;
3046 }
3047 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3048
3049 /*
3050  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3051  * are not running, paused or suspended for the specified stream direction.
3052  */
3053 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3054                 struct snd_soc_pcm_runtime *be, int stream)
3055 {
3056         struct snd_soc_dpcm *dpcm;
3057         int state;
3058         int ret = 1;
3059         unsigned long flags;
3060
3061         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3062         for_each_dpcm_fe(be, stream, dpcm) {
3063
3064                 if (dpcm->fe == fe)
3065                         continue;
3066
3067                 state = dpcm->fe->dpcm[stream].state;
3068                 if (state == SND_SOC_DPCM_STATE_START ||
3069                         state == SND_SOC_DPCM_STATE_PAUSED ||
3070                         state == SND_SOC_DPCM_STATE_SUSPEND) {
3071                         ret = 0;
3072                         break;
3073                 }
3074         }
3075         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3076
3077         /* it's safe to free/stop this BE DAI */
3078         return ret;
3079 }
3080 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3081
3082 /*
3083  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3084  * running, paused or suspended for the specified stream direction.
3085  */
3086 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3087                 struct snd_soc_pcm_runtime *be, int stream)
3088 {
3089         struct snd_soc_dpcm *dpcm;
3090         int state;
3091         int ret = 1;
3092         unsigned long flags;
3093
3094         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3095         for_each_dpcm_fe(be, stream, dpcm) {
3096
3097                 if (dpcm->fe == fe)
3098                         continue;
3099
3100                 state = dpcm->fe->dpcm[stream].state;
3101                 if (state == SND_SOC_DPCM_STATE_START ||
3102                         state == SND_SOC_DPCM_STATE_PAUSED ||
3103                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3104                         state == SND_SOC_DPCM_STATE_PREPARE) {
3105                         ret = 0;
3106                         break;
3107                 }
3108         }
3109         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3110
3111         /* it's safe to change hw_params */
3112         return ret;
3113 }
3114 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3115
3116 #ifdef CONFIG_DEBUG_FS
3117 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3118 {
3119         switch (state) {
3120         case SND_SOC_DPCM_STATE_NEW:
3121                 return "new";
3122         case SND_SOC_DPCM_STATE_OPEN:
3123                 return "open";
3124         case SND_SOC_DPCM_STATE_HW_PARAMS:
3125                 return "hw_params";
3126         case SND_SOC_DPCM_STATE_PREPARE:
3127                 return "prepare";
3128         case SND_SOC_DPCM_STATE_START:
3129                 return "start";
3130         case SND_SOC_DPCM_STATE_STOP:
3131                 return "stop";
3132         case SND_SOC_DPCM_STATE_SUSPEND:
3133                 return "suspend";
3134         case SND_SOC_DPCM_STATE_PAUSED:
3135                 return "paused";
3136         case SND_SOC_DPCM_STATE_HW_FREE:
3137                 return "hw_free";
3138         case SND_SOC_DPCM_STATE_CLOSE:
3139                 return "close";
3140         }
3141
3142         return "unknown";
3143 }
3144
3145 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3146                                 int stream, char *buf, size_t size)
3147 {
3148         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3149         struct snd_soc_dpcm *dpcm;
3150         ssize_t offset = 0;
3151         unsigned long flags;
3152
3153         /* FE state */
3154         offset += snprintf(buf + offset, size - offset,
3155                         "[%s - %s]\n", fe->dai_link->name,
3156                         stream ? "Capture" : "Playback");
3157
3158         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3159                         dpcm_state_string(fe->dpcm[stream].state));
3160
3161         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3162             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3163                 offset += snprintf(buf + offset, size - offset,
3164                                 "Hardware Params: "
3165                                 "Format = %s, Channels = %d, Rate = %d\n",
3166                                 snd_pcm_format_name(params_format(params)),
3167                                 params_channels(params),
3168                                 params_rate(params));
3169
3170         /* BEs state */
3171         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3172
3173         if (list_empty(&fe->dpcm[stream].be_clients)) {
3174                 offset += snprintf(buf + offset, size - offset,
3175                                 " No active DSP links\n");
3176                 goto out;
3177         }
3178
3179         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3180         for_each_dpcm_be(fe, stream, dpcm) {
3181                 struct snd_soc_pcm_runtime *be = dpcm->be;
3182                 params = &dpcm->hw_params;
3183
3184                 offset += snprintf(buf + offset, size - offset,
3185                                 "- %s\n", be->dai_link->name);
3186
3187                 offset += snprintf(buf + offset, size - offset,
3188                                 "   State: %s\n",
3189                                 dpcm_state_string(be->dpcm[stream].state));
3190
3191                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3192                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3193                         offset += snprintf(buf + offset, size - offset,
3194                                 "   Hardware Params: "
3195                                 "Format = %s, Channels = %d, Rate = %d\n",
3196                                 snd_pcm_format_name(params_format(params)),
3197                                 params_channels(params),
3198                                 params_rate(params));
3199         }
3200         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3201 out:
3202         return offset;
3203 }
3204
3205 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3206                                 size_t count, loff_t *ppos)
3207 {
3208         struct snd_soc_pcm_runtime *fe = file->private_data;
3209         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3210         char *buf;
3211
3212         buf = kmalloc(out_count, GFP_KERNEL);
3213         if (!buf)
3214                 return -ENOMEM;
3215
3216         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3217                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3218                                         buf + offset, out_count - offset);
3219
3220         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3221                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3222                                         buf + offset, out_count - offset);
3223
3224         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3225
3226         kfree(buf);
3227         return ret;
3228 }
3229
3230 static const struct file_operations dpcm_state_fops = {
3231         .open = simple_open,
3232         .read = dpcm_state_read_file,
3233         .llseek = default_llseek,
3234 };
3235
3236 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3237 {
3238         if (!rtd->dai_link)
3239                 return;
3240
3241         if (!rtd->dai_link->dynamic)
3242                 return;
3243
3244         if (!rtd->card->debugfs_card_root)
3245                 return;
3246
3247         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3248                         rtd->card->debugfs_card_root);
3249
3250         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3251                             rtd, &dpcm_state_fops);
3252 }
3253 #endif