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/module.h>
  19 #include <linux/slab.h>
  20 #include <linux/workqueue.h>
  21 #include <linux/export.h>
  22 #include <linux/debugfs.h>
  23 #include <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/soc-dpcm.h>
  28 #include <sound/initval.h>
  29
  30 #define DPCM_MAX_BE_USERS       8
  31
  32 /*
  33  * snd_soc_dai_stream_valid() - check if a DAI supports the given stream
  34  *
  35  * Returns true if the DAI supports the indicated stream type.
  36  */
  37 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
  38 {
  39         struct snd_soc_pcm_stream *codec_stream;
  40
  41         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
  42                 codec_stream = &dai->driver->playback;
  43         else
  44                 codec_stream = &dai->driver->capture;
  45
  46         /* If the codec specifies any rate at all, it supports the stream. */
  47         return codec_stream->rates;
  48 }
  49
  50 /**
  51  * snd_soc_runtime_activate() - Increment active count for PCM runtime components
  52  * @rtd: ASoC PCM runtime that is activated
  53  * @stream: Direction of the PCM stream
  54  *
  55  * Increments the active count for all the DAIs and components attached to a PCM
  56  * runtime. Should typically be called when a stream is opened.
  57  *
  58  * Must be called with the rtd->pcm_mutex being held
  59  */
  60 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
  61 {
  62         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  63         struct snd_soc_dai *codec_dai;
  64         int i;
  65
  66         lockdep_assert_held(&rtd->pcm_mutex);
  67
  68         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  69                 cpu_dai->playback_active++;
  70                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  71                         codec_dai->playback_active++;
  72         } else {
  73                 cpu_dai->capture_active++;
  74                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  75                         codec_dai->capture_active++;
  76         }
  77
  78         cpu_dai->active++;
  79         cpu_dai->component->active++;
  80         for_each_rtd_codec_dai(rtd, i, codec_dai) {
  81                 codec_dai->active++;
  82                 codec_dai->component->active++;
  83         }
  84 }
  85
  86 /**
  87  * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
  88  * @rtd: ASoC PCM runtime that is deactivated
  89  * @stream: Direction of the PCM stream
  90  *
  91  * Decrements the active count for all the DAIs and components attached to a PCM
  92  * runtime. Should typically be called when a stream is closed.
  93  *
  94  * Must be called with the rtd->pcm_mutex being held
  95  */
  96 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
  97 {
  98         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  99         struct snd_soc_dai *codec_dai;
 100         int i;
 101
 102         lockdep_assert_held(&rtd->pcm_mutex);
 103
 104         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 105                 cpu_dai->playback_active--;
 106                 for_each_rtd_codec_dai(rtd, i, codec_dai)
 107                         codec_dai->playback_active--;
 108         } else {
 109                 cpu_dai->capture_active--;
 110                 for_each_rtd_codec_dai(rtd, i, codec_dai)
 111                         codec_dai->capture_active--;
 112         }
 113
 114         cpu_dai->active--;
 115         cpu_dai->component->active--;
 116         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 117                 codec_dai->component->active--;
 118                 codec_dai->active--;
 119         }
 120 }
 121
 122 /**
 123  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
 124  * @rtd: The ASoC PCM runtime that should be checked.
 125  *
 126  * This function checks whether the power down delay should be ignored for a
 127  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
 128  * been configured to ignore the delay, or if none of the components benefits
 129  * from having the delay.
 130  */
 131 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
 132 {
 133         struct snd_soc_rtdcom_list *rtdcom;
 134         struct snd_soc_component *component;
 135         bool ignore = true;
 136
 137         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
 138                 return true;
 139
 140         for_each_rtdcom(rtd, rtdcom) {
 141                 component = rtdcom->component;
 142
 143                 ignore &= !component->driver->use_pmdown_time;
 144         }
 145
 146         return ignore;
 147 }
 148
 149 /**
 150  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 151  * @substream: the pcm substream
 152  * @hw: the hardware parameters
 153  *
 154  * Sets the substream runtime hardware parameters.
 155  */
 156 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 157         const struct snd_pcm_hardware *hw)
 158 {
 159         struct snd_pcm_runtime *runtime = substream->runtime;
 160         runtime->hw.info = hw->info;
 161         runtime->hw.formats = hw->formats;
 162         runtime->hw.period_bytes_min = hw->period_bytes_min;
 163         runtime->hw.period_bytes_max = hw->period_bytes_max;
 164         runtime->hw.periods_min = hw->periods_min;
 165         runtime->hw.periods_max = hw->periods_max;
 166         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
 167         runtime->hw.fifo_size = hw->fifo_size;
 168         return 0;
 169 }
 170 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 171
 172 /* DPCM stream event, send event to FE and all active BEs. */
 173 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
 174         int event)
 175 {
 176         struct snd_soc_dpcm *dpcm;
 177
 178         for_each_dpcm_be(fe, dir, dpcm) {
 179
 180                 struct snd_soc_pcm_runtime *be = dpcm->be;
 181
 182                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
 183                                 be->dai_link->name, event, dir);
 184
 185                 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
 186                     (be->dpcm[dir].users >= 1))
 187                         continue;
 188
 189                 snd_soc_dapm_stream_event(be, dir, event);
 190         }
 191
 192         snd_soc_dapm_stream_event(fe, dir, event);
 193
 194         return 0;
 195 }
 196
 197 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
 198                                         struct snd_soc_dai *soc_dai)
 199 {
 200         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 201         int ret;
 202
 203         if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
 204                                 rtd->dai_link->symmetric_rates)) {
 205                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
 206                                 soc_dai->rate);
 207
 208                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 209                                                 SNDRV_PCM_HW_PARAM_RATE,
 210                                                 soc_dai->rate);
 211                 if (ret < 0) {
 212                         dev_err(soc_dai->dev,
 213                                 "ASoC: Unable to apply rate constraint: %d\n",
 214                                 ret);
 215                         return ret;
 216                 }
 217         }
 218
 219         if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
 220                                 rtd->dai_link->symmetric_channels)) {
 221                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
 222                                 soc_dai->channels);
 223
 224                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 225                                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 226                                                 soc_dai->channels);
 227                 if (ret < 0) {
 228                         dev_err(soc_dai->dev,
 229                                 "ASoC: Unable to apply channel symmetry constraint: %d\n",
 230                                 ret);
 231                         return ret;
 232                 }
 233         }
 234
 235         if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
 236                                 rtd->dai_link->symmetric_samplebits)) {
 237                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
 238                                 soc_dai->sample_bits);
 239
 240                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 241                                                 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 242                                                 soc_dai->sample_bits);
 243                 if (ret < 0) {
 244                         dev_err(soc_dai->dev,
 245                                 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
 246                                 ret);
 247                         return ret;
 248                 }
 249         }
 250
 251         return 0;
 252 }
 253
 254 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 255                                 struct snd_pcm_hw_params *params)
 256 {
 257         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 258         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 259         struct snd_soc_dai *codec_dai;
 260         unsigned int rate, channels, sample_bits, symmetry, i;
 261
 262         rate = params_rate(params);
 263         channels = params_channels(params);
 264         sample_bits = snd_pcm_format_physical_width(params_format(params));
 265
 266         /* reject unmatched parameters when applying symmetry */
 267         symmetry = cpu_dai->driver->symmetric_rates ||
 268                 rtd->dai_link->symmetric_rates;
 269
 270         for_each_rtd_codec_dai(rtd, i, codec_dai)
 271                 symmetry |= codec_dai->driver->symmetric_rates;
 272
 273         if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
 274                 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
 275                                 cpu_dai->rate, rate);
 276                 return -EINVAL;
 277         }
 278
 279         symmetry = cpu_dai->driver->symmetric_channels ||
 280                 rtd->dai_link->symmetric_channels;
 281
 282         for_each_rtd_codec_dai(rtd, i, codec_dai)
 283                 symmetry |= codec_dai->driver->symmetric_channels;
 284
 285         if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
 286                 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
 287                                 cpu_dai->channels, channels);
 288                 return -EINVAL;
 289         }
 290
 291         symmetry = cpu_dai->driver->symmetric_samplebits ||
 292                 rtd->dai_link->symmetric_samplebits;
 293
 294         for_each_rtd_codec_dai(rtd, i, codec_dai)
 295                 symmetry |= codec_dai->driver->symmetric_samplebits;
 296
 297         if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
 298                 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
 299                                 cpu_dai->sample_bits, sample_bits);
 300                 return -EINVAL;
 301         }
 302
 303         return 0;
 304 }
 305
 306 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
 307 {
 308         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 309         struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
 310         struct snd_soc_dai_link *link = rtd->dai_link;
 311         struct snd_soc_dai *codec_dai;
 312         unsigned int symmetry, i;
 313
 314         symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
 315                 cpu_driver->symmetric_channels || link->symmetric_channels ||
 316                 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
 317
 318         for_each_rtd_codec_dai(rtd, i, codec_dai)
 319                 symmetry = symmetry ||
 320                         codec_dai->driver->symmetric_rates ||
 321                         codec_dai->driver->symmetric_channels ||
 322                         codec_dai->driver->symmetric_samplebits;
 323
 324         return symmetry;
 325 }
 326
 327 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
 328 {
 329         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 330         int ret;
 331
 332         if (!bits)
 333                 return;
 334
 335         ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
 336         if (ret != 0)
 337                 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
 338                                  bits, ret);
 339 }
 340
 341 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 342 {
 343         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 344         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 345         struct snd_soc_dai *codec_dai;
 346         int i;
 347         unsigned int bits = 0, cpu_bits;
 348
 349         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 350                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 351                         if (codec_dai->driver->playback.sig_bits == 0) {
 352                                 bits = 0;
 353                                 break;
 354                         }
 355                         bits = max(codec_dai->driver->playback.sig_bits, bits);
 356                 }
 357                 cpu_bits = cpu_dai->driver->playback.sig_bits;
 358         } else {
 359                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 360                         if (codec_dai->driver->capture.sig_bits == 0) {
 361                                 bits = 0;
 362                                 break;
 363                         }
 364                         bits = max(codec_dai->driver->capture.sig_bits, bits);
 365                 }
 366                 cpu_bits = cpu_dai->driver->capture.sig_bits;
 367         }
 368
 369         soc_pcm_set_msb(substream, bits);
 370         soc_pcm_set_msb(substream, cpu_bits);
 371 }
 372
 373 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 374 {
 375         struct snd_pcm_runtime *runtime = substream->runtime;
 376         struct snd_pcm_hardware *hw = &runtime->hw;
 377         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 378         struct snd_soc_dai *codec_dai;
 379         struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
 380         struct snd_soc_dai_driver *codec_dai_drv;
 381         struct snd_soc_pcm_stream *codec_stream;
 382         struct snd_soc_pcm_stream *cpu_stream;
 383         unsigned int chan_min = 0, chan_max = UINT_MAX;
 384         unsigned int rate_min = 0, rate_max = UINT_MAX;
 385         unsigned int rates = UINT_MAX;
 386         u64 formats = ULLONG_MAX;
 387         int i;
 388
 389         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 390                 cpu_stream = &cpu_dai_drv->playback;
 391         else
 392                 cpu_stream = &cpu_dai_drv->capture;
 393
 394         /* first calculate min/max only for CODECs in the DAI link */
 395         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 396
 397                 /*
 398                  * Skip CODECs which don't support the current stream type.
 399                  * Otherwise, since the rate, channel, and format values will
 400                  * zero in that case, we would have no usable settings left,
 401                  * causing the resulting setup to fail.
 402                  * At least one CODEC should match, otherwise we should have
 403                  * bailed out on a higher level, since there would be no
 404                  * CODEC to support the transfer direction in that case.
 405                  */
 406                 if (!snd_soc_dai_stream_valid(codec_dai,
 407                                               substream->stream))
 408                         continue;
 409
 410                 codec_dai_drv = codec_dai->driver;
 411                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 412                         codec_stream = &codec_dai_drv->playback;
 413                 else
 414                         codec_stream = &codec_dai_drv->capture;
 415                 chan_min = max(chan_min, codec_stream->channels_min);
 416                 chan_max = min(chan_max, codec_stream->channels_max);
 417                 rate_min = max(rate_min, codec_stream->rate_min);
 418                 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
 419                 formats &= codec_stream->formats;
 420                 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
 421         }
 422
 423         /*
 424          * chan min/max cannot be enforced if there are multiple CODEC DAIs
 425          * connected to a single CPU DAI, use CPU DAI's directly and let
 426          * channel allocation be fixed up later
 427          */
 428         if (rtd->num_codecs > 1) {
 429                 chan_min = cpu_stream->channels_min;
 430                 chan_max = cpu_stream->channels_max;
 431         }
 432
 433         hw->channels_min = max(chan_min, cpu_stream->channels_min);
 434         hw->channels_max = min(chan_max, cpu_stream->channels_max);
 435         if (hw->formats)
 436                 hw->formats &= formats & cpu_stream->formats;
 437         else
 438                 hw->formats = formats & cpu_stream->formats;
 439         hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
 440
 441         snd_pcm_limit_hw_rates(runtime);
 442
 443         hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
 444         hw->rate_min = max(hw->rate_min, rate_min);
 445         hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
 446         hw->rate_max = min_not_zero(hw->rate_max, rate_max);
 447 }
 448
 449 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 450                                     struct snd_soc_component *last)
 451 {
 452         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 453         struct snd_soc_rtdcom_list *rtdcom;
 454         struct snd_soc_component *component;
 455
 456         for_each_rtdcom(rtd, rtdcom) {
 457                 component = rtdcom->component;
 458
 459                 if (component == last)
 460                         break;
 461
 462                 if (!component->driver->ops ||
 463                     !component->driver->ops->close)
 464                         continue;
 465
 466                 component->driver->ops->close(substream);
 467
 468                 if (component->driver->module_get_upon_open)
 469                         module_put(component->dev->driver->owner);
 470         }
 471
 472         return 0;
 473 }
 474
 475 /*
 476  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 477  * then initialized and any private data can be allocated. This also calls
 478  * startup for the cpu DAI, component, machine and codec DAI.
 479  */
 480 static int soc_pcm_open(struct snd_pcm_substream *substream)
 481 {
 482         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 483         struct snd_pcm_runtime *runtime = substream->runtime;
 484         struct snd_soc_component *component;
 485         struct snd_soc_rtdcom_list *rtdcom;
 486         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 487         struct snd_soc_dai *codec_dai;
 488         const char *codec_dai_name = "multicodec";
 489         int i, ret = 0;
 490
 491         pinctrl_pm_select_default_state(cpu_dai->dev);
 492         for_each_rtd_codec_dai(rtd, i, codec_dai)
 493                 pinctrl_pm_select_default_state(codec_dai->dev);
 494
 495         for_each_rtdcom(rtd, rtdcom) {
 496                 component = rtdcom->component;
 497
 498                 pm_runtime_get_sync(component->dev);
 499         }
 500
 501         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 502
 503         /* startup the audio subsystem */
 504         if (cpu_dai->driver->ops->startup) {
 505                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 506                 if (ret < 0) {
 507                         dev_err(cpu_dai->dev, "ASoC: can't open interface"
 508                                 " %s: %d\n", cpu_dai->name, ret);
 509                         goto out;
 510                 }
 511         }
 512
 513         for_each_rtdcom(rtd, rtdcom) {
 514                 component = rtdcom->component;
 515
 516                 if (!component->driver->ops ||
 517                     !component->driver->ops->open)
 518                         continue;
 519
 520                 if (component->driver->module_get_upon_open &&
 521                     !try_module_get(component->dev->driver->owner)) {
 522                         ret = -ENODEV;
 523                         goto module_err;
 524                 }
 525
 526                 ret = component->driver->ops->open(substream);
 527                 if (ret < 0) {
 528                         dev_err(component->dev,
 529                                 "ASoC: can't open component %s: %d\n",
 530                                 component->name, ret);
 531                         goto component_err;
 532                 }
 533         }
 534         component = NULL;
 535
 536         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 537                 if (codec_dai->driver->ops->startup) {
 538                         ret = codec_dai->driver->ops->startup(substream,
 539                                                               codec_dai);
 540                         if (ret < 0) {
 541                                 dev_err(codec_dai->dev,
 542                                         "ASoC: can't open codec %s: %d\n",
 543                                         codec_dai->name, ret);
 544                                 goto codec_dai_err;
 545                         }
 546                 }
 547
 548                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 549                         codec_dai->tx_mask = 0;
 550                 else
 551                         codec_dai->rx_mask = 0;
 552         }
 553
 554         if (rtd->dai_link->ops->startup) {
 555                 ret = rtd->dai_link->ops->startup(substream);
 556                 if (ret < 0) {
 557                         pr_err("ASoC: %s startup failed: %d\n",
 558                                rtd->dai_link->name, ret);
 559                         goto machine_err;
 560                 }
 561         }
 562
 563         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 564         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 565                 goto dynamic;
 566
 567         /* Check that the codec and cpu DAIs are compatible */
 568         soc_pcm_init_runtime_hw(substream);
 569
 570         if (rtd->num_codecs == 1)
 571                 codec_dai_name = rtd->codec_dai->name;
 572
 573         if (soc_pcm_has_symmetry(substream))
 574                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 575
 576         ret = -EINVAL;
 577         if (!runtime->hw.rates) {
 578                 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
 579                         codec_dai_name, cpu_dai->name);
 580                 goto config_err;
 581         }
 582         if (!runtime->hw.formats) {
 583                 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
 584                         codec_dai_name, cpu_dai->name);
 585                 goto config_err;
 586         }
 587         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 588             runtime->hw.channels_min > runtime->hw.channels_max) {
 589                 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
 590                                 codec_dai_name, cpu_dai->name);
 591                 goto config_err;
 592         }
 593
 594         soc_pcm_apply_msb(substream);
 595
 596         /* Symmetry only applies if we've already got an active stream. */
 597         if (cpu_dai->active) {
 598                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
 599                 if (ret != 0)
 600                         goto config_err;
 601         }
 602
 603         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 604                 if (codec_dai->active) {
 605                         ret = soc_pcm_apply_symmetry(substream, codec_dai);
 606                         if (ret != 0)
 607                                 goto config_err;
 608                 }
 609         }
 610
 611         pr_debug("ASoC: %s <-> %s info:\n",
 612                         codec_dai_name, cpu_dai->name);
 613         pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
 614         pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
 615                  runtime->hw.channels_max);
 616         pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
 617                  runtime->hw.rate_max);
 618
 619 dynamic:
 620
 621         snd_soc_runtime_activate(rtd, substream->stream);
 622
 623         mutex_unlock(&rtd->pcm_mutex);
 624         return 0;
 625
 626 config_err:
 627         if (rtd->dai_link->ops->shutdown)
 628                 rtd->dai_link->ops->shutdown(substream);
 629
 630 machine_err:
 631         i = rtd->num_codecs;
 632
 633 codec_dai_err:
 634         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
 635                 if (codec_dai->driver->ops->shutdown)
 636                         codec_dai->driver->ops->shutdown(substream, codec_dai);
 637         }
 638
 639 component_err:
 640         soc_pcm_components_close(substream, component);
 641 module_err:
 642         if (cpu_dai->driver->ops->shutdown)
 643                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 644 out:
 645         mutex_unlock(&rtd->pcm_mutex);
 646
 647         for_each_rtdcom(rtd, rtdcom) {
 648                 component = rtdcom->component;
 649
 650                 pm_runtime_mark_last_busy(component->dev);
 651                 pm_runtime_put_autosuspend(component->dev);
 652         }
 653
 654         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 655                 if (!codec_dai->active)
 656                         pinctrl_pm_select_sleep_state(codec_dai->dev);
 657         }
 658         if (!cpu_dai->active)
 659                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 660
 661         return ret;
 662 }
 663
 664 /*
 665  * Power down the audio subsystem pmdown_time msecs after close is called.
 666  * This is to ensure there are no pops or clicks in between any music tracks
 667  * due to DAPM power cycling.
 668  */
 669 static void close_delayed_work(struct work_struct *work)
 670 {
 671         struct snd_soc_pcm_runtime *rtd =
 672                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 673         struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
 674
 675         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 676
 677         dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
 678                  codec_dai->driver->playback.stream_name,
 679                  codec_dai->playback_active ? "active" : "inactive",
 680                  rtd->pop_wait ? "yes" : "no");
 681
 682         /* are we waiting on this codec DAI stream */
 683         if (rtd->pop_wait == 1) {
 684                 rtd->pop_wait = 0;
 685                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 686                                           SND_SOC_DAPM_STREAM_STOP);
 687         }
 688
 689         mutex_unlock(&rtd->pcm_mutex);
 690 }
 691
 692 /*
 693  * Called by ALSA when a PCM substream is closed. Private data can be
 694  * freed here. The cpu DAI, codec DAI, machine and components are also
 695  * shutdown.
 696  */
 697 static int soc_pcm_close(struct snd_pcm_substream *substream)
 698 {
 699         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 700         struct snd_soc_component *component;
 701         struct snd_soc_rtdcom_list *rtdcom;
 702         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 703         struct snd_soc_dai *codec_dai;
 704         int i;
 705
 706         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 707
 708         snd_soc_runtime_deactivate(rtd, substream->stream);
 709
 710         /* clear the corresponding DAIs rate when inactive */
 711         if (!cpu_dai->active)
 712                 cpu_dai->rate = 0;
 713
 714         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 715                 if (!codec_dai->active)
 716                         codec_dai->rate = 0;
 717         }
 718
 719         snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
 720
 721         if (cpu_dai->driver->ops->shutdown)
 722                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 723
 724         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 725                 if (codec_dai->driver->ops->shutdown)
 726                         codec_dai->driver->ops->shutdown(substream, codec_dai);
 727         }
 728
 729         if (rtd->dai_link->ops->shutdown)
 730                 rtd->dai_link->ops->shutdown(substream);
 731
 732         soc_pcm_components_close(substream, NULL);
 733
 734         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 735                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 736                         /* powered down playback stream now */
 737                         snd_soc_dapm_stream_event(rtd,
 738                                                   SNDRV_PCM_STREAM_PLAYBACK,
 739                                                   SND_SOC_DAPM_STREAM_STOP);
 740                 } else {
 741                         /* start delayed pop wq here for playback streams */
 742                         rtd->pop_wait = 1;
 743                         queue_delayed_work(system_power_efficient_wq,
 744                                            &rtd->delayed_work,
 745                                            msecs_to_jiffies(rtd->pmdown_time));
 746                 }
 747         } else {
 748                 /* capture streams can be powered down now */
 749                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 750                                           SND_SOC_DAPM_STREAM_STOP);
 751         }
 752
 753         mutex_unlock(&rtd->pcm_mutex);
 754
 755         for_each_rtdcom(rtd, rtdcom) {
 756                 component = rtdcom->component;
 757
 758                 pm_runtime_mark_last_busy(component->dev);
 759                 pm_runtime_put_autosuspend(component->dev);
 760         }
 761
 762         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 763                 if (!codec_dai->active)
 764                         pinctrl_pm_select_sleep_state(codec_dai->dev);
 765         }
 766         if (!cpu_dai->active)
 767                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 768
 769         return 0;
 770 }
 771
 772 /*
 773  * Called by ALSA when the PCM substream is prepared, can set format, sample
 774  * rate, etc.  This function is non atomic and can be called multiple times,
 775  * it can refer to the runtime info.
 776  */
 777 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 778 {
 779         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 780         struct snd_soc_component *component;
 781         struct snd_soc_rtdcom_list *rtdcom;
 782         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 783         struct snd_soc_dai *codec_dai;
 784         int i, ret = 0;
 785
 786         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 787
 788         if (rtd->dai_link->ops->prepare) {
 789                 ret = rtd->dai_link->ops->prepare(substream);
 790                 if (ret < 0) {
 791                         dev_err(rtd->card->dev, "ASoC: machine prepare error:"
 792                                 " %d\n", ret);
 793                         goto out;
 794                 }
 795         }
 796
 797         for_each_rtdcom(rtd, rtdcom) {
 798                 component = rtdcom->component;
 799
 800                 if (!component->driver->ops ||
 801                     !component->driver->ops->prepare)
 802                         continue;
 803
 804                 ret = component->driver->ops->prepare(substream);
 805                 if (ret < 0) {
 806                         dev_err(component->dev,
 807                                 "ASoC: platform prepare error: %d\n", ret);
 808                         goto out;
 809                 }
 810         }
 811
 812         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 813                 if (codec_dai->driver->ops->prepare) {
 814                         ret = codec_dai->driver->ops->prepare(substream,
 815                                                               codec_dai);
 816                         if (ret < 0) {
 817                                 dev_err(codec_dai->dev,
 818                                         "ASoC: codec DAI prepare error: %d\n",
 819                                         ret);
 820                                 goto out;
 821                         }
 822                 }
 823         }
 824
 825         if (cpu_dai->driver->ops->prepare) {
 826                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 827                 if (ret < 0) {
 828                         dev_err(cpu_dai->dev,
 829                                 "ASoC: cpu DAI prepare error: %d\n", ret);
 830                         goto out;
 831                 }
 832         }
 833
 834         /* cancel any delayed stream shutdown that is pending */
 835         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 836             rtd->pop_wait) {
 837                 rtd->pop_wait = 0;
 838                 cancel_delayed_work(&rtd->delayed_work);
 839         }
 840
 841         snd_soc_dapm_stream_event(rtd, substream->stream,
 842                         SND_SOC_DAPM_STREAM_START);
 843
 844         for_each_rtd_codec_dai(rtd, i, codec_dai)
 845                 snd_soc_dai_digital_mute(codec_dai, 0,
 846                                          substream->stream);
 847         snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
 848
 849 out:
 850         mutex_unlock(&rtd->pcm_mutex);
 851         return ret;
 852 }
 853
 854 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 855                                        unsigned int mask)
 856 {
 857         struct snd_interval *interval;
 858         int channels = hweight_long(mask);
 859
 860         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 861         interval->min = channels;
 862         interval->max = channels;
 863 }
 864
 865 int soc_dai_hw_params(struct snd_pcm_substream *substream,
 866                       struct snd_pcm_hw_params *params,
 867                       struct snd_soc_dai *dai)
 868 {
 869         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 870         int ret;
 871
 872         /* perform any topology hw_params fixups before DAI  */
 873         if (rtd->dai_link->be_hw_params_fixup) {
 874                 ret = rtd->dai_link->be_hw_params_fixup(rtd, params);
 875                 if (ret < 0) {
 876                         dev_err(rtd->dev,
 877                                 "ASoC: hw_params topology fixup failed %d\n",
 878                                 ret);
 879                         return ret;
 880                 }
 881         }
 882
 883         if (dai->driver->ops->hw_params) {
 884                 ret = dai->driver->ops->hw_params(substream, params, dai);
 885                 if (ret < 0) {
 886                         dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
 887                                 dai->name, ret);
 888                         return ret;
 889                 }
 890         }
 891
 892         return 0;
 893 }
 894
 895 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
 896                                       struct snd_soc_component *last)
 897 {
 898         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 899         struct snd_soc_rtdcom_list *rtdcom;
 900         struct snd_soc_component *component;
 901
 902         for_each_rtdcom(rtd, rtdcom) {
 903                 component = rtdcom->component;
 904
 905                 if (component == last)
 906                         break;
 907
 908                 if (!component->driver->ops ||
 909                     !component->driver->ops->hw_free)
 910                         continue;
 911
 912                 component->driver->ops->hw_free(substream);
 913         }
 914
 915         return 0;
 916 }
 917
 918 /*
 919  * Called by ALSA when the hardware params are set by application. This
 920  * function can also be called multiple times and can allocate buffers
 921  * (using snd_pcm_lib_* ). It's non-atomic.
 922  */
 923 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 924                                 struct snd_pcm_hw_params *params)
 925 {
 926         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 927         struct snd_soc_component *component;
 928         struct snd_soc_rtdcom_list *rtdcom;
 929         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 930         struct snd_soc_dai *codec_dai;
 931         int i, ret = 0;
 932
 933         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 934         if (rtd->dai_link->ops->hw_params) {
 935                 ret = rtd->dai_link->ops->hw_params(substream, params);
 936                 if (ret < 0) {
 937                         dev_err(rtd->card->dev, "ASoC: machine hw_params"
 938                                 " failed: %d\n", ret);
 939                         goto out;
 940                 }
 941         }
 942
 943         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 944                 struct snd_pcm_hw_params codec_params;
 945
 946                 /*
 947                  * Skip CODECs which don't support the current stream type,
 948                  * the idea being that if a CODEC is not used for the currently
 949                  * set up transfer direction, it should not need to be
 950                  * configured, especially since the configuration used might
 951                  * not even be supported by that CODEC. There may be cases
 952                  * however where a CODEC needs to be set up although it is
 953                  * actually not being used for the transfer, e.g. if a
 954                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
 955                  * for the DAI link including a playback-only CODEC.
 956                  * If this becomes necessary, we will have to augment the
 957                  * machine driver setup with information on how to act, so
 958                  * we can do the right thing here.
 959                  */
 960                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 961                         continue;
 962
 963                 /* copy params for each codec */
 964                 codec_params = *params;
 965
 966                 /* fixup params based on TDM slot masks */
 967                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 968                     codec_dai->tx_mask)
 969                         soc_pcm_codec_params_fixup(&codec_params,
 970                                                    codec_dai->tx_mask);
 971
 972                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
 973                     codec_dai->rx_mask)
 974                         soc_pcm_codec_params_fixup(&codec_params,
 975                                                    codec_dai->rx_mask);
 976
 977                 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
 978                 if(ret < 0)
 979                         goto codec_err;
 980
 981                 codec_dai->rate = params_rate(&codec_params);
 982                 codec_dai->channels = params_channels(&codec_params);
 983                 codec_dai->sample_bits = snd_pcm_format_physical_width(
 984                                                 params_format(&codec_params));
 985
 986                 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
 987         }
 988
 989         ret = soc_dai_hw_params(substream, params, cpu_dai);
 990         if (ret < 0)
 991                 goto interface_err;
 992
 993         for_each_rtdcom(rtd, rtdcom) {
 994                 component = rtdcom->component;
 995
 996                 if (!component->driver->ops ||
 997                     !component->driver->ops->hw_params)
 998                         continue;
 999
1000                 ret = component->driver->ops->hw_params(substream, params);
1001                 if (ret < 0) {
1002                         dev_err(component->dev,
1003                                 "ASoC: %s hw params failed: %d\n",
1004                                 component->name, ret);
1005                         goto component_err;
1006                 }
1007         }
1008         component = NULL;
1009
1010         /* store the parameters for each DAIs */
1011         cpu_dai->rate = params_rate(params);
1012         cpu_dai->channels = params_channels(params);
1013         cpu_dai->sample_bits =
1014                 snd_pcm_format_physical_width(params_format(params));
1015
1016         snd_soc_dapm_update_dai(substream, params, cpu_dai);
1017
1018         ret = soc_pcm_params_symmetry(substream, params);
1019         if (ret)
1020                 goto component_err;
1021 out:
1022         mutex_unlock(&rtd->pcm_mutex);
1023         return ret;
1024
1025 component_err:
1026         soc_pcm_components_hw_free(substream, component);
1027
1028         if (cpu_dai->driver->ops->hw_free)
1029                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1030
1031 interface_err:
1032         i = rtd->num_codecs;
1033
1034 codec_err:
1035         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
1036                 if (codec_dai->driver->ops->hw_free)
1037                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1038                 codec_dai->rate = 0;
1039         }
1040
1041         if (rtd->dai_link->ops->hw_free)
1042                 rtd->dai_link->ops->hw_free(substream);
1043
1044         mutex_unlock(&rtd->pcm_mutex);
1045         return ret;
1046 }
1047
1048 /*
1049  * Frees resources allocated by hw_params, can be called multiple times
1050  */
1051 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1052 {
1053         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1054         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1055         struct snd_soc_dai *codec_dai;
1056         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1057         int i;
1058
1059         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1060
1061         /* clear the corresponding DAIs parameters when going to be inactive */
1062         if (cpu_dai->active == 1) {
1063                 cpu_dai->rate = 0;
1064                 cpu_dai->channels = 0;
1065                 cpu_dai->sample_bits = 0;
1066         }
1067
1068         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1069                 if (codec_dai->active == 1) {
1070                         codec_dai->rate = 0;
1071                         codec_dai->channels = 0;
1072                         codec_dai->sample_bits = 0;
1073                 }
1074         }
1075
1076         /* apply codec digital mute */
1077         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1078                 if ((playback && codec_dai->playback_active == 1) ||
1079                     (!playback && codec_dai->capture_active == 1))
1080                         snd_soc_dai_digital_mute(codec_dai, 1,
1081                                                  substream->stream);
1082         }
1083
1084         /* free any machine hw params */
1085         if (rtd->dai_link->ops->hw_free)
1086                 rtd->dai_link->ops->hw_free(substream);
1087
1088         /* free any component resources */
1089         soc_pcm_components_hw_free(substream, NULL);
1090
1091         /* now free hw params for the DAIs  */
1092         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1093                 if (codec_dai->driver->ops->hw_free)
1094                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1095         }
1096
1097         if (cpu_dai->driver->ops->hw_free)
1098                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1099
1100         mutex_unlock(&rtd->pcm_mutex);
1101         return 0;
1102 }
1103
1104 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1105 {
1106         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1107         struct snd_soc_component *component;
1108         struct snd_soc_rtdcom_list *rtdcom;
1109         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1110         struct snd_soc_dai *codec_dai;
1111         int i, ret;
1112
1113         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1114                 if (codec_dai->driver->ops->trigger) {
1115                         ret = codec_dai->driver->ops->trigger(substream,
1116                                                               cmd, codec_dai);
1117                         if (ret < 0)
1118                                 return ret;
1119                 }
1120         }
1121
1122         for_each_rtdcom(rtd, rtdcom) {
1123                 component = rtdcom->component;
1124
1125                 if (!component->driver->ops ||
1126                     !component->driver->ops->trigger)
1127                         continue;
1128
1129                 ret = component->driver->ops->trigger(substream, cmd);
1130                 if (ret < 0)
1131                         return ret;
1132         }
1133
1134         if (cpu_dai->driver->ops->trigger) {
1135                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1136                 if (ret < 0)
1137                         return ret;
1138         }
1139
1140         if (rtd->dai_link->ops->trigger) {
1141                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1142                 if (ret < 0)
1143                         return ret;
1144         }
1145
1146         return 0;
1147 }
1148
1149 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1150                                    int cmd)
1151 {
1152         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1153         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1154         struct snd_soc_dai *codec_dai;
1155         int i, ret;
1156
1157         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1158                 if (codec_dai->driver->ops->bespoke_trigger) {
1159                         ret = codec_dai->driver->ops->bespoke_trigger(substream,
1160                                                                 cmd, codec_dai);
1161                         if (ret < 0)
1162                                 return ret;
1163                 }
1164         }
1165
1166         if (cpu_dai->driver->ops->bespoke_trigger) {
1167                 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1168                 if (ret < 0)
1169                         return ret;
1170         }
1171         return 0;
1172 }
1173 /*
1174  * soc level wrapper for pointer callback
1175  * If cpu_dai, codec_dai, component driver has the delay callback, then
1176  * the runtime->delay will be updated accordingly.
1177  */
1178 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1179 {
1180         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1181         struct snd_soc_component *component;
1182         struct snd_soc_rtdcom_list *rtdcom;
1183         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1184         struct snd_soc_dai *codec_dai;
1185         struct snd_pcm_runtime *runtime = substream->runtime;
1186         snd_pcm_uframes_t offset = 0;
1187         snd_pcm_sframes_t delay = 0;
1188         snd_pcm_sframes_t codec_delay = 0;
1189         int i;
1190
1191         /* clearing the previous total delay */
1192         runtime->delay = 0;
1193
1194         for_each_rtdcom(rtd, rtdcom) {
1195                 component = rtdcom->component;
1196
1197                 if (!component->driver->ops ||
1198                     !component->driver->ops->pointer)
1199                         continue;
1200
1201                 /* FIXME: use 1st pointer */
1202                 offset = component->driver->ops->pointer(substream);
1203                 break;
1204         }
1205         /* base delay if assigned in pointer callback */
1206         delay = runtime->delay;
1207
1208         if (cpu_dai->driver->ops->delay)
1209                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1210
1211         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1212                 if (codec_dai->driver->ops->delay)
1213                         codec_delay = max(codec_delay,
1214                                         codec_dai->driver->ops->delay(substream,
1215                                                                     codec_dai));
1216         }
1217         delay += codec_delay;
1218
1219         runtime->delay = delay;
1220
1221         return offset;
1222 }
1223
1224 /* connect a FE and BE */
1225 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1226                 struct snd_soc_pcm_runtime *be, int stream)
1227 {
1228         struct snd_soc_dpcm *dpcm;
1229         unsigned long flags;
1230
1231         /* only add new dpcms */
1232         for_each_dpcm_be(fe, stream, dpcm) {
1233                 if (dpcm->be == be && dpcm->fe == fe)
1234                         return 0;
1235         }
1236
1237         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1238         if (!dpcm)
1239                 return -ENOMEM;
1240
1241         dpcm->be = be;
1242         dpcm->fe = fe;
1243         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1244         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1245         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1246         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1247         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1248         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1249
1250         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1251                         stream ? "capture" : "playback",  fe->dai_link->name,
1252                         stream ? "<-" : "->", be->dai_link->name);
1253
1254 #ifdef CONFIG_DEBUG_FS
1255         if (fe->debugfs_dpcm_root)
1256                 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1257                                 fe->debugfs_dpcm_root, &dpcm->state);
1258 #endif
1259         return 1;
1260 }
1261
1262 /* reparent a BE onto another FE */
1263 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1264                         struct snd_soc_pcm_runtime *be, int stream)
1265 {
1266         struct snd_soc_dpcm *dpcm;
1267         struct snd_pcm_substream *fe_substream, *be_substream;
1268
1269         /* reparent if BE is connected to other FEs */
1270         if (!be->dpcm[stream].users)
1271                 return;
1272
1273         be_substream = snd_soc_dpcm_get_substream(be, stream);
1274
1275         for_each_dpcm_fe(be, stream, dpcm) {
1276                 if (dpcm->fe == fe)
1277                         continue;
1278
1279                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1280                         stream ? "capture" : "playback",
1281                         dpcm->fe->dai_link->name,
1282                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1283
1284                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1285                 be_substream->runtime = fe_substream->runtime;
1286                 break;
1287         }
1288 }
1289
1290 /* disconnect a BE and FE */
1291 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1292 {
1293         struct snd_soc_dpcm *dpcm, *d;
1294         unsigned long flags;
1295
1296         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1297                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1298                                 stream ? "capture" : "playback",
1299                                 dpcm->be->dai_link->name);
1300
1301                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1302                         continue;
1303
1304                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1305                         stream ? "capture" : "playback", fe->dai_link->name,
1306                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1307
1308                 /* BEs still alive need new FE */
1309                 dpcm_be_reparent(fe, dpcm->be, stream);
1310
1311 #ifdef CONFIG_DEBUG_FS
1312                 debugfs_remove(dpcm->debugfs_state);
1313 #endif
1314                 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1315                 list_del(&dpcm->list_be);
1316                 list_del(&dpcm->list_fe);
1317                 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1318                 kfree(dpcm);
1319         }
1320 }
1321
1322 /* get BE for DAI widget and stream */
1323 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1324                 struct snd_soc_dapm_widget *widget, int stream)
1325 {
1326         struct snd_soc_pcm_runtime *be;
1327         struct snd_soc_dai *dai;
1328         int i;
1329
1330         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1331
1332         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1333                 for_each_card_rtds(card, be) {
1334
1335                         if (!be->dai_link->no_pcm)
1336                                 continue;
1337
1338                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1339                                 be->cpu_dai->playback_widget ?
1340                                 be->cpu_dai->playback_widget->name : "(not set)");
1341
1342                         if (be->cpu_dai->playback_widget == widget)
1343                                 return be;
1344
1345                         for_each_rtd_codec_dai(be, i, dai) {
1346                                 if (dai->playback_widget == widget)
1347                                         return be;
1348                         }
1349                 }
1350         } else {
1351
1352                 for_each_card_rtds(card, be) {
1353
1354                         if (!be->dai_link->no_pcm)
1355                                 continue;
1356
1357                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1358                                 be->cpu_dai->capture_widget ?
1359                                 be->cpu_dai->capture_widget->name : "(not set)");
1360
1361                         if (be->cpu_dai->capture_widget == widget)
1362                                 return be;
1363
1364                         for_each_rtd_codec_dai(be, i, dai) {
1365                                 if (dai->capture_widget == widget)
1366                                         return be;
1367                         }
1368                 }
1369         }
1370
1371         /* dai link name and stream name set correctly ? */
1372         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1373                 stream ? "capture" : "playback", widget->name);
1374         return NULL;
1375 }
1376
1377 static inline struct snd_soc_dapm_widget *
1378         dai_get_widget(struct snd_soc_dai *dai, int stream)
1379 {
1380         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1381                 return dai->playback_widget;
1382         else
1383                 return dai->capture_widget;
1384 }
1385
1386 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1387                 struct snd_soc_dapm_widget *widget)
1388 {
1389         int i;
1390
1391         for (i = 0; i < list->num_widgets; i++) {
1392                 if (widget == list->widgets[i])
1393                         return 1;
1394         }
1395
1396         return 0;
1397 }
1398
1399 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1400                 enum snd_soc_dapm_direction dir)
1401 {
1402         struct snd_soc_card *card = widget->dapm->card;
1403         struct snd_soc_pcm_runtime *rtd;
1404         struct snd_soc_dai *dai;
1405         int i;
1406
1407         if (dir == SND_SOC_DAPM_DIR_OUT) {
1408                 for_each_card_rtds(card, rtd) {
1409                         if (!rtd->dai_link->no_pcm)
1410                                 continue;
1411
1412                         if (rtd->cpu_dai->playback_widget == widget)
1413                                 return true;
1414
1415                         for_each_rtd_codec_dai(rtd, i, dai) {
1416                                 if (dai->playback_widget == widget)
1417                                         return true;
1418                         }
1419                 }
1420         } else { /* SND_SOC_DAPM_DIR_IN */
1421                 for_each_card_rtds(card, rtd) {
1422                         if (!rtd->dai_link->no_pcm)
1423                                 continue;
1424
1425                         if (rtd->cpu_dai->capture_widget == widget)
1426                                 return true;
1427
1428                         for_each_rtd_codec_dai(rtd, i, dai) {
1429                                 if (dai->capture_widget == widget)
1430                                         return true;
1431                         }
1432                 }
1433         }
1434
1435         return false;
1436 }
1437
1438 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1439         int stream, struct snd_soc_dapm_widget_list **list)
1440 {
1441         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1442         int paths;
1443
1444         /* get number of valid DAI paths and their widgets */
1445         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1446                         dpcm_end_walk_at_be);
1447
1448         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1449                         stream ? "capture" : "playback");
1450
1451         return paths;
1452 }
1453
1454 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1455         struct snd_soc_dapm_widget_list **list_)
1456 {
1457         struct snd_soc_dpcm *dpcm;
1458         struct snd_soc_dapm_widget_list *list = *list_;
1459         struct snd_soc_dapm_widget *widget;
1460         struct snd_soc_dai *dai;
1461         int prune = 0;
1462
1463         /* Destroy any old FE <--> BE connections */
1464         for_each_dpcm_be(fe, stream, dpcm) {
1465                 unsigned int i;
1466
1467                 /* is there a valid CPU DAI widget for this BE */
1468                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1469
1470                 /* prune the BE if it's no longer in our active list */
1471                 if (widget && widget_in_list(list, widget))
1472                         continue;
1473
1474                 /* is there a valid CODEC DAI widget for this BE */
1475                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1476                         widget = dai_get_widget(dai, stream);
1477
1478                         /* prune the BE if it's no longer in our active list */
1479                         if (widget && widget_in_list(list, widget))
1480                                 continue;
1481                 }
1482
1483                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1484                         stream ? "capture" : "playback",
1485                         dpcm->be->dai_link->name, fe->dai_link->name);
1486                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1487                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1488                 prune++;
1489         }
1490
1491         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1492         return prune;
1493 }
1494
1495 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1496         struct snd_soc_dapm_widget_list **list_)
1497 {
1498         struct snd_soc_card *card = fe->card;
1499         struct snd_soc_dapm_widget_list *list = *list_;
1500         struct snd_soc_pcm_runtime *be;
1501         int i, new = 0, err;
1502
1503         /* Create any new FE <--> BE connections */
1504         for (i = 0; i < list->num_widgets; i++) {
1505
1506                 switch (list->widgets[i]->id) {
1507                 case snd_soc_dapm_dai_in:
1508                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1509                                 continue;
1510                         break;
1511                 case snd_soc_dapm_dai_out:
1512                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1513                                 continue;
1514                         break;
1515                 default:
1516                         continue;
1517                 }
1518
1519                 /* is there a valid BE rtd for this widget */
1520                 be = dpcm_get_be(card, list->widgets[i], stream);
1521                 if (!be) {
1522                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1523                                         list->widgets[i]->name);
1524                         continue;
1525                 }
1526
1527                 /* make sure BE is a real BE */
1528                 if (!be->dai_link->no_pcm)
1529                         continue;
1530
1531                 /* don't connect if FE is not running */
1532                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1533                         continue;
1534
1535                 /* newly connected FE and BE */
1536                 err = dpcm_be_connect(fe, be, stream);
1537                 if (err < 0) {
1538                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1539                                 list->widgets[i]->name);
1540                         break;
1541                 } else if (err == 0) /* already connected */
1542                         continue;
1543
1544                 /* new */
1545                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1546                 new++;
1547         }
1548
1549         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1550         return new;
1551 }
1552
1553 /*
1554  * Find the corresponding BE DAIs that source or sink audio to this
1555  * FE substream.
1556  */
1557 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1558         int stream, struct snd_soc_dapm_widget_list **list, int new)
1559 {
1560         if (new)
1561                 return dpcm_add_paths(fe, stream, list);
1562         else
1563                 return dpcm_prune_paths(fe, stream, list);
1564 }
1565
1566 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1567 {
1568         struct snd_soc_dpcm *dpcm;
1569         unsigned long flags;
1570
1571         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1572         for_each_dpcm_be(fe, stream, dpcm)
1573                 dpcm->be->dpcm[stream].runtime_update =
1574                                                 SND_SOC_DPCM_UPDATE_NO;
1575         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1576 }
1577
1578 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1579         int stream)
1580 {
1581         struct snd_soc_dpcm *dpcm;
1582
1583         /* disable any enabled and non active backends */
1584         for_each_dpcm_be(fe, stream, dpcm) {
1585
1586                 struct snd_soc_pcm_runtime *be = dpcm->be;
1587                 struct snd_pcm_substream *be_substream =
1588                         snd_soc_dpcm_get_substream(be, stream);
1589
1590                 if (be->dpcm[stream].users == 0)
1591                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1592                                 stream ? "capture" : "playback",
1593                                 be->dpcm[stream].state);
1594
1595                 if (--be->dpcm[stream].users != 0)
1596                         continue;
1597
1598                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1599                         continue;
1600
1601                 soc_pcm_close(be_substream);
1602                 be_substream->runtime = NULL;
1603                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1604         }
1605 }
1606
1607 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1608 {
1609         struct snd_soc_dpcm *dpcm;
1610         int err, count = 0;
1611
1612         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1613         for_each_dpcm_be(fe, stream, dpcm) {
1614
1615                 struct snd_soc_pcm_runtime *be = dpcm->be;
1616                 struct snd_pcm_substream *be_substream =
1617                         snd_soc_dpcm_get_substream(be, stream);
1618
1619                 if (!be_substream) {
1620                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1621                                 stream ? "capture" : "playback");
1622                         continue;
1623                 }
1624
1625                 /* is this op for this BE ? */
1626                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1627                         continue;
1628
1629                 /* first time the dpcm is open ? */
1630                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1631                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1632                                 stream ? "capture" : "playback",
1633                                 be->dpcm[stream].state);
1634
1635                 if (be->dpcm[stream].users++ != 0)
1636                         continue;
1637
1638                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1639                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1640                         continue;
1641
1642                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1643                         stream ? "capture" : "playback", be->dai_link->name);
1644
1645                 be_substream->runtime = be->dpcm[stream].runtime;
1646                 err = soc_pcm_open(be_substream);
1647                 if (err < 0) {
1648                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1649                         be->dpcm[stream].users--;
1650                         if (be->dpcm[stream].users < 0)
1651                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1652                                         stream ? "capture" : "playback",
1653                                         be->dpcm[stream].state);
1654
1655                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1656                         goto unwind;
1657                 }
1658
1659                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1660                 count++;
1661         }
1662
1663         return count;
1664
1665 unwind:
1666         /* disable any enabled and non active backends */
1667         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1668                 struct snd_soc_pcm_runtime *be = dpcm->be;
1669                 struct snd_pcm_substream *be_substream =
1670                         snd_soc_dpcm_get_substream(be, stream);
1671
1672                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1673                         continue;
1674
1675                 if (be->dpcm[stream].users == 0)
1676                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1677                                 stream ? "capture" : "playback",
1678                                 be->dpcm[stream].state);
1679
1680                 if (--be->dpcm[stream].users != 0)
1681                         continue;
1682
1683                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1684                         continue;
1685
1686                 soc_pcm_close(be_substream);
1687                 be_substream->runtime = NULL;
1688                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1689         }
1690
1691         return err;
1692 }
1693
1694 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1695                                  struct snd_soc_pcm_stream *stream)
1696 {
1697         runtime->hw.rate_min = stream->rate_min;
1698         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1699         runtime->hw.channels_min = stream->channels_min;
1700         runtime->hw.channels_max = stream->channels_max;
1701         if (runtime->hw.formats)
1702                 runtime->hw.formats &= stream->formats;
1703         else
1704                 runtime->hw.formats = stream->formats;
1705         runtime->hw.rates = stream->rates;
1706 }
1707
1708 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1709                                       u64 *formats)
1710 {
1711         struct snd_soc_pcm_runtime *fe = substream->private_data;
1712         struct snd_soc_dpcm *dpcm;
1713         struct snd_soc_dai *dai;
1714         int stream = substream->stream;
1715
1716         if (!fe->dai_link->dpcm_merged_format)
1717                 return;
1718
1719         /*
1720          * It returns merged BE codec format
1721          * if FE want to use it (= dpcm_merged_format)
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 *codec_dai_drv;
1727                 struct snd_soc_pcm_stream *codec_stream;
1728                 int i;
1729
1730                 for_each_rtd_codec_dai(be, i, dai) {
1731                         /*
1732                          * Skip CODECs which don't support the current stream
1733                          * type. See soc_pcm_init_runtime_hw() for more details
1734                          */
1735                         if (!snd_soc_dai_stream_valid(dai, stream))
1736                                 continue;
1737
1738                         codec_dai_drv = dai->driver;
1739                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1740                                 codec_stream = &codec_dai_drv->playback;
1741                         else
1742                                 codec_stream = &codec_dai_drv->capture;
1743
1744                         *formats &= codec_stream->formats;
1745                 }
1746         }
1747 }
1748
1749 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1750                                     unsigned int *channels_min,
1751                                     unsigned int *channels_max)
1752 {
1753         struct snd_soc_pcm_runtime *fe = substream->private_data;
1754         struct snd_soc_dpcm *dpcm;
1755         int stream = substream->stream;
1756
1757         if (!fe->dai_link->dpcm_merged_chan)
1758                 return;
1759
1760         /*
1761          * It returns merged BE codec channel;
1762          * if FE want to use it (= dpcm_merged_chan)
1763          */
1764
1765         for_each_dpcm_be(fe, stream, dpcm) {
1766                 struct snd_soc_pcm_runtime *be = dpcm->be;
1767                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1768                 struct snd_soc_dai_driver *codec_dai_drv;
1769                 struct snd_soc_pcm_stream *codec_stream;
1770                 struct snd_soc_pcm_stream *cpu_stream;
1771
1772                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1773                         cpu_stream = &cpu_dai_drv->playback;
1774                 else
1775                         cpu_stream = &cpu_dai_drv->capture;
1776
1777                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1778                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1779
1780                 /*
1781                  * chan min/max cannot be enforced if there are multiple CODEC
1782                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1783                  */
1784                 if (be->num_codecs == 1) {
1785                         codec_dai_drv = be->codec_dais[0]->driver;
1786
1787                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1788                                 codec_stream = &codec_dai_drv->playback;
1789                         else
1790                                 codec_stream = &codec_dai_drv->capture;
1791
1792                         *channels_min = max(*channels_min,
1793                                             codec_stream->channels_min);
1794                         *channels_max = min(*channels_max,
1795                                             codec_stream->channels_max);
1796                 }
1797         }
1798 }
1799
1800 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1801                                     unsigned int *rates,
1802                                     unsigned int *rate_min,
1803                                     unsigned int *rate_max)
1804 {
1805         struct snd_soc_pcm_runtime *fe = substream->private_data;
1806         struct snd_soc_dpcm *dpcm;
1807         int stream = substream->stream;
1808
1809         if (!fe->dai_link->dpcm_merged_rate)
1810                 return;
1811
1812         /*
1813          * It returns merged BE codec channel;
1814          * if FE want to use it (= dpcm_merged_chan)
1815          */
1816
1817         for_each_dpcm_be(fe, stream, dpcm) {
1818                 struct snd_soc_pcm_runtime *be = dpcm->be;
1819                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1820                 struct snd_soc_dai_driver *codec_dai_drv;
1821                 struct snd_soc_pcm_stream *codec_stream;
1822                 struct snd_soc_pcm_stream *cpu_stream;
1823                 struct snd_soc_dai *dai;
1824                 int i;
1825
1826                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1827                         cpu_stream = &cpu_dai_drv->playback;
1828                 else
1829                         cpu_stream = &cpu_dai_drv->capture;
1830
1831                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1832                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1833                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1834
1835                 for_each_rtd_codec_dai(be, i, dai) {
1836                         /*
1837                          * Skip CODECs which don't support the current stream
1838                          * type. See soc_pcm_init_runtime_hw() for more details
1839                          */
1840                         if (!snd_soc_dai_stream_valid(dai, stream))
1841                                 continue;
1842
1843                         codec_dai_drv = dai->driver;
1844                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1845                                 codec_stream = &codec_dai_drv->playback;
1846                         else
1847                                 codec_stream = &codec_dai_drv->capture;
1848
1849                         *rate_min = max(*rate_min, codec_stream->rate_min);
1850                         *rate_max = min_not_zero(*rate_max,
1851                                                  codec_stream->rate_max);
1852                         *rates = snd_pcm_rate_mask_intersect(*rates,
1853                                                 codec_stream->rates);
1854                 }
1855         }
1856 }
1857
1858 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1859 {
1860         struct snd_pcm_runtime *runtime = substream->runtime;
1861         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1862         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1863         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1864
1865         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1866                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1867         else
1868                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1869
1870         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1871         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1872                                 &runtime->hw.channels_max);
1873         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1874                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1875 }
1876
1877 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1878
1879 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1880  * for avoiding the race with trigger callback.
1881  * If the state is unset and a trigger is pending while the previous operation,
1882  * process the pending trigger action here.
1883  */
1884 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1885                                      int stream, enum snd_soc_dpcm_update state)
1886 {
1887         struct snd_pcm_substream *substream =
1888                 snd_soc_dpcm_get_substream(fe, stream);
1889
1890         snd_pcm_stream_lock_irq(substream);
1891         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1892                 dpcm_fe_dai_do_trigger(substream,
1893                                        fe->dpcm[stream].trigger_pending - 1);
1894                 fe->dpcm[stream].trigger_pending = 0;
1895         }
1896         fe->dpcm[stream].runtime_update = state;
1897         snd_pcm_stream_unlock_irq(substream);
1898 }
1899
1900 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1901                                int stream)
1902 {
1903         struct snd_soc_dpcm *dpcm;
1904         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1905         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1906         int err;
1907
1908         /* apply symmetry for FE */
1909         if (soc_pcm_has_symmetry(fe_substream))
1910                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1911
1912         /* Symmetry only applies if we've got an active stream. */
1913         if (fe_cpu_dai->active) {
1914                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1915                 if (err < 0)
1916                         return err;
1917         }
1918
1919         /* apply symmetry for BE */
1920         for_each_dpcm_be(fe, stream, dpcm) {
1921                 struct snd_soc_pcm_runtime *be = dpcm->be;
1922                 struct snd_pcm_substream *be_substream =
1923                         snd_soc_dpcm_get_substream(be, stream);
1924                 struct snd_soc_pcm_runtime *rtd;
1925                 struct snd_soc_dai *codec_dai;
1926                 int i;
1927
1928                 /* A backend may not have the requested substream */
1929                 if (!be_substream)
1930                         continue;
1931
1932                 rtd = be_substream->private_data;
1933                 if (rtd->dai_link->be_hw_params_fixup)
1934                         continue;
1935
1936                 if (soc_pcm_has_symmetry(be_substream))
1937                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1938
1939                 /* Symmetry only applies if we've got an active stream. */
1940                 if (rtd->cpu_dai->active) {
1941                         err = soc_pcm_apply_symmetry(fe_substream,
1942                                                      rtd->cpu_dai);
1943                         if (err < 0)
1944                                 return err;
1945                 }
1946
1947                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1948                         if (codec_dai->active) {
1949                                 err = soc_pcm_apply_symmetry(fe_substream,
1950                                                              codec_dai);
1951                                 if (err < 0)
1952                                         return err;
1953                         }
1954                 }
1955         }
1956
1957         return 0;
1958 }
1959
1960 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1961 {
1962         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1963         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1964         int stream = fe_substream->stream, ret = 0;
1965
1966         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1967
1968         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1969         if (ret < 0) {
1970                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1971                 goto be_err;
1972         }
1973
1974         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1975
1976         /* start the DAI frontend */
1977         ret = soc_pcm_open(fe_substream);
1978         if (ret < 0) {
1979                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1980                 goto unwind;
1981         }
1982
1983         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1984
1985         dpcm_set_fe_runtime(fe_substream);
1986         snd_pcm_limit_hw_rates(runtime);
1987
1988         ret = dpcm_apply_symmetry(fe_substream, stream);
1989         if (ret < 0) {
1990                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1991                         ret);
1992                 goto unwind;
1993         }
1994
1995         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1996         return 0;
1997
1998 unwind:
1999         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
2000 be_err:
2001         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2002         return ret;
2003 }
2004
2005 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2006 {
2007         struct snd_soc_dpcm *dpcm;
2008
2009         /* only shutdown BEs that are either sinks or sources to this FE DAI */
2010         for_each_dpcm_be(fe, stream, dpcm) {
2011
2012                 struct snd_soc_pcm_runtime *be = dpcm->be;
2013                 struct snd_pcm_substream *be_substream =
2014                         snd_soc_dpcm_get_substream(be, stream);
2015
2016                 /* is this op for this BE ? */
2017                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2018                         continue;
2019
2020                 if (be->dpcm[stream].users == 0)
2021                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
2022                                 stream ? "capture" : "playback",
2023                                 be->dpcm[stream].state);
2024
2025                 if (--be->dpcm[stream].users != 0)
2026                         continue;
2027
2028                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2029                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2030                         soc_pcm_hw_free(be_substream);
2031                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2032                 }
2033
2034                 dev_dbg(be->dev, "ASoC: close BE %s\n",
2035                         be->dai_link->name);
2036
2037                 soc_pcm_close(be_substream);
2038                 be_substream->runtime = NULL;
2039
2040                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2041         }
2042         return 0;
2043 }
2044
2045 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2046 {
2047         struct snd_soc_pcm_runtime *fe = substream->private_data;
2048         int stream = substream->stream;
2049
2050         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2051
2052         /* shutdown the BEs */
2053         dpcm_be_dai_shutdown(fe, substream->stream);
2054
2055         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2056
2057         /* now shutdown the frontend */
2058         soc_pcm_close(substream);
2059
2060         /* run the stream event for each BE */
2061         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2062
2063         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2064         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2065         return 0;
2066 }
2067
2068 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2069 {
2070         struct snd_soc_dpcm *dpcm;
2071
2072         /* only hw_params backends that are either sinks or sources
2073          * to this frontend DAI */
2074         for_each_dpcm_be(fe, stream, dpcm) {
2075
2076                 struct snd_soc_pcm_runtime *be = dpcm->be;
2077                 struct snd_pcm_substream *be_substream =
2078                         snd_soc_dpcm_get_substream(be, stream);
2079
2080                 /* is this op for this BE ? */
2081                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2082                         continue;
2083
2084                 /* only free hw when no longer used - check all FEs */
2085                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2086                                 continue;
2087
2088                 /* do not free hw if this BE is used by other FE */
2089                 if (be->dpcm[stream].users > 1)
2090                         continue;
2091
2092                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2093                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2094                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2095                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2096                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2097                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2098                         continue;
2099
2100                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2101                         be->dai_link->name);
2102
2103                 soc_pcm_hw_free(be_substream);
2104
2105                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2106         }
2107
2108         return 0;
2109 }
2110
2111 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2112 {
2113         struct snd_soc_pcm_runtime *fe = substream->private_data;
2114         int err, stream = substream->stream;
2115
2116         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2117         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2118
2119         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2120
2121         /* call hw_free on the frontend */
2122         err = soc_pcm_hw_free(substream);
2123         if (err < 0)
2124                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2125                         fe->dai_link->name);
2126
2127         /* only hw_params backends that are either sinks or sources
2128          * to this frontend DAI */
2129         err = dpcm_be_dai_hw_free(fe, stream);
2130
2131         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2132         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2133
2134         mutex_unlock(&fe->card->mutex);
2135         return 0;
2136 }
2137
2138 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2139 {
2140         struct snd_soc_dpcm *dpcm;
2141         int ret;
2142
2143         for_each_dpcm_be(fe, stream, dpcm) {
2144
2145                 struct snd_soc_pcm_runtime *be = dpcm->be;
2146                 struct snd_pcm_substream *be_substream =
2147                         snd_soc_dpcm_get_substream(be, stream);
2148
2149                 /* is this op for this BE ? */
2150                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2151                         continue;
2152
2153                 /* copy params for each dpcm */
2154                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2155                                 sizeof(struct snd_pcm_hw_params));
2156
2157                 /* perform any hw_params fixups */
2158                 if (be->dai_link->be_hw_params_fixup) {
2159                         ret = be->dai_link->be_hw_params_fixup(be,
2160                                         &dpcm->hw_params);
2161                         if (ret < 0) {
2162                                 dev_err(be->dev,
2163                                         "ASoC: hw_params BE fixup failed %d\n",
2164                                         ret);
2165                                 goto unwind;
2166                         }
2167                 }
2168
2169                 /* only allow hw_params() if no connected FEs are running */
2170                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2171                         continue;
2172
2173                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2174                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2175                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2176                         continue;
2177
2178                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2179                         be->dai_link->name);
2180
2181                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2182                 if (ret < 0) {
2183                         dev_err(dpcm->be->dev,
2184                                 "ASoC: hw_params BE failed %d\n", ret);
2185                         goto unwind;
2186                 }
2187
2188                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2189         }
2190         return 0;
2191
2192 unwind:
2193         /* disable any enabled and non active backends */
2194         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2195                 struct snd_soc_pcm_runtime *be = dpcm->be;
2196                 struct snd_pcm_substream *be_substream =
2197                         snd_soc_dpcm_get_substream(be, stream);
2198
2199                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2200                         continue;
2201
2202                 /* only allow hw_free() if no connected FEs are running */
2203                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2204                         continue;
2205
2206                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2207                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2208                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2209                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2210                         continue;
2211
2212                 soc_pcm_hw_free(be_substream);
2213         }
2214
2215         return ret;
2216 }
2217
2218 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2219                                  struct snd_pcm_hw_params *params)
2220 {
2221         struct snd_soc_pcm_runtime *fe = substream->private_data;
2222         int ret, stream = substream->stream;
2223
2224         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2225         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2226
2227         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2228                         sizeof(struct snd_pcm_hw_params));
2229         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2230         if (ret < 0) {
2231                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2232                 goto out;
2233         }
2234
2235         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2236                         fe->dai_link->name, params_rate(params),
2237                         params_channels(params), params_format(params));
2238
2239         /* call hw_params on the frontend */
2240         ret = soc_pcm_hw_params(substream, params);
2241         if (ret < 0) {
2242                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2243                 dpcm_be_dai_hw_free(fe, stream);
2244          } else
2245                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2246
2247 out:
2248         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2249         mutex_unlock(&fe->card->mutex);
2250         return ret;
2251 }
2252
2253 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2254                 struct snd_pcm_substream *substream, int cmd)
2255 {
2256         int ret;
2257
2258         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2259                         dpcm->be->dai_link->name, cmd);
2260
2261         ret = soc_pcm_trigger(substream, cmd);
2262         if (ret < 0)
2263                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2264
2265         return ret;
2266 }
2267
2268 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2269                                int cmd)
2270 {
2271         struct snd_soc_dpcm *dpcm;
2272         int ret = 0;
2273
2274         for_each_dpcm_be(fe, stream, dpcm) {
2275
2276                 struct snd_soc_pcm_runtime *be = dpcm->be;
2277                 struct snd_pcm_substream *be_substream =
2278                         snd_soc_dpcm_get_substream(be, stream);
2279
2280                 /* is this op for this BE ? */
2281                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2282                         continue;
2283
2284                 switch (cmd) {
2285                 case SNDRV_PCM_TRIGGER_START:
2286                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2287                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2288                                 continue;
2289
2290                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2291                         if (ret)
2292                                 return ret;
2293
2294                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2295                         break;
2296                 case SNDRV_PCM_TRIGGER_RESUME:
2297                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2298                                 continue;
2299
2300                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2301                         if (ret)
2302                                 return ret;
2303
2304                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2305                         break;
2306                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2307                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2308                                 continue;
2309
2310                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2311                         if (ret)
2312                                 return ret;
2313
2314                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2315                         break;
2316                 case SNDRV_PCM_TRIGGER_STOP:
2317                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2318                                 continue;
2319
2320                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2321                                 continue;
2322
2323                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2324                         if (ret)
2325                                 return ret;
2326
2327                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2328                         break;
2329                 case SNDRV_PCM_TRIGGER_SUSPEND:
2330                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2331                                 continue;
2332
2333                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2334                                 continue;
2335
2336                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2337                         if (ret)
2338                                 return ret;
2339
2340                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2341                         break;
2342                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2343                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2344                                 continue;
2345
2346                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2347                                 continue;
2348
2349                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2350                         if (ret)
2351                                 return ret;
2352
2353                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2354                         break;
2355                 }
2356         }
2357
2358         return ret;
2359 }
2360 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2361
2362 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2363 {
2364         struct snd_soc_pcm_runtime *fe = substream->private_data;
2365         int stream = substream->stream, ret;
2366         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2367
2368         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2369
2370         switch (trigger) {
2371         case SND_SOC_DPCM_TRIGGER_PRE:
2372                 /* call trigger on the frontend before the backend. */
2373
2374                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2375                                 fe->dai_link->name, cmd);
2376
2377                 ret = soc_pcm_trigger(substream, cmd);
2378                 if (ret < 0) {
2379                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2380                         goto out;
2381                 }
2382
2383                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2384                 break;
2385         case SND_SOC_DPCM_TRIGGER_POST:
2386                 /* call trigger on the frontend after the backend. */
2387
2388                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2389                 if (ret < 0) {
2390                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2391                         goto out;
2392                 }
2393
2394                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2395                                 fe->dai_link->name, cmd);
2396
2397                 ret = soc_pcm_trigger(substream, cmd);
2398                 break;
2399         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2400                 /* bespoke trigger() - handles both FE and BEs */
2401
2402                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2403                                 fe->dai_link->name, cmd);
2404
2405                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2406                 if (ret < 0) {
2407                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2408                         goto out;
2409                 }
2410                 break;
2411         default:
2412                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2413                                 fe->dai_link->name);
2414                 ret = -EINVAL;
2415                 goto out;
2416         }
2417
2418         switch (cmd) {
2419         case SNDRV_PCM_TRIGGER_START:
2420         case SNDRV_PCM_TRIGGER_RESUME:
2421         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2422                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2423                 break;
2424         case SNDRV_PCM_TRIGGER_STOP:
2425         case SNDRV_PCM_TRIGGER_SUSPEND:
2426                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2427                 break;
2428         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2429                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2430                 break;
2431         }
2432
2433 out:
2434         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2435         return ret;
2436 }
2437
2438 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2439 {
2440         struct snd_soc_pcm_runtime *fe = substream->private_data;
2441         int stream = substream->stream;
2442
2443         /* if FE's runtime_update is already set, we're in race;
2444          * process this trigger later at exit
2445          */
2446         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2447                 fe->dpcm[stream].trigger_pending = cmd + 1;
2448                 return 0; /* delayed, assuming it's successful */
2449         }
2450
2451         /* we're alone, let's trigger */
2452         return dpcm_fe_dai_do_trigger(substream, cmd);
2453 }
2454
2455 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2456 {
2457         struct snd_soc_dpcm *dpcm;
2458         int ret = 0;
2459
2460         for_each_dpcm_be(fe, stream, dpcm) {
2461
2462                 struct snd_soc_pcm_runtime *be = dpcm->be;
2463                 struct snd_pcm_substream *be_substream =
2464                         snd_soc_dpcm_get_substream(be, stream);
2465
2466                 /* is this op for this BE ? */
2467                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2468                         continue;
2469
2470                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2471                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2472                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2473                         continue;
2474
2475                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2476                         be->dai_link->name);
2477
2478                 ret = soc_pcm_prepare(be_substream);
2479                 if (ret < 0) {
2480                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2481                                 ret);
2482                         break;
2483                 }
2484
2485                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2486         }
2487         return ret;
2488 }
2489
2490 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2491 {
2492         struct snd_soc_pcm_runtime *fe = substream->private_data;
2493         int stream = substream->stream, ret = 0;
2494
2495         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2496
2497         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2498
2499         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2500
2501         /* there is no point preparing this FE if there are no BEs */
2502         if (list_empty(&fe->dpcm[stream].be_clients)) {
2503                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2504                                 fe->dai_link->name);
2505                 ret = -EINVAL;
2506                 goto out;
2507         }
2508
2509         ret = dpcm_be_dai_prepare(fe, substream->stream);
2510         if (ret < 0)
2511                 goto out;
2512
2513         /* call prepare on the frontend */
2514         ret = soc_pcm_prepare(substream);
2515         if (ret < 0) {
2516                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2517                         fe->dai_link->name);
2518                 goto out;
2519         }
2520
2521         /* run the stream event for each BE */
2522         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2523         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2524
2525 out:
2526         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2527         mutex_unlock(&fe->card->mutex);
2528
2529         return ret;
2530 }
2531
2532 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2533                      unsigned int cmd, void *arg)
2534 {
2535         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2536         struct snd_soc_component *component;
2537         struct snd_soc_rtdcom_list *rtdcom;
2538
2539         for_each_rtdcom(rtd, rtdcom) {
2540                 component = rtdcom->component;
2541
2542                 if (!component->driver->ops ||
2543                     !component->driver->ops->ioctl)
2544                         continue;
2545
2546                 /* FIXME: use 1st ioctl */
2547                 return component->driver->ops->ioctl(substream, cmd, arg);
2548         }
2549
2550         return snd_pcm_lib_ioctl(substream, cmd, arg);
2551 }
2552
2553 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2554 {
2555         struct snd_pcm_substream *substream =
2556                 snd_soc_dpcm_get_substream(fe, stream);
2557         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2558         int err;
2559
2560         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2561                         stream ? "capture" : "playback", fe->dai_link->name);
2562
2563         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2564                 /* call bespoke trigger - FE takes care of all BE triggers */
2565                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2566                                 fe->dai_link->name);
2567
2568                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2569                 if (err < 0)
2570                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2571         } else {
2572                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2573                         fe->dai_link->name);
2574
2575                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2576                 if (err < 0)
2577                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2578         }
2579
2580         err = dpcm_be_dai_hw_free(fe, stream);
2581         if (err < 0)
2582                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2583
2584         err = dpcm_be_dai_shutdown(fe, stream);
2585         if (err < 0)
2586                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2587
2588         /* run the stream event for each BE */
2589         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2590
2591         return 0;
2592 }
2593
2594 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2595 {
2596         struct snd_pcm_substream *substream =
2597                 snd_soc_dpcm_get_substream(fe, stream);
2598         struct snd_soc_dpcm *dpcm;
2599         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2600         int ret;
2601         unsigned long flags;
2602
2603         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2604                         stream ? "capture" : "playback", fe->dai_link->name);
2605
2606         /* Only start the BE if the FE is ready */
2607         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2608                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2609                 return -EINVAL;
2610
2611         /* startup must always be called for new BEs */
2612         ret = dpcm_be_dai_startup(fe, stream);
2613         if (ret < 0)
2614                 goto disconnect;
2615
2616         /* keep going if FE state is > open */
2617         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2618                 return 0;
2619
2620         ret = dpcm_be_dai_hw_params(fe, stream);
2621         if (ret < 0)
2622                 goto close;
2623
2624         /* keep going if FE state is > hw_params */
2625         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2626                 return 0;
2627
2628
2629         ret = dpcm_be_dai_prepare(fe, stream);
2630         if (ret < 0)
2631                 goto hw_free;
2632
2633         /* run the stream event for each BE */
2634         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2635
2636         /* keep going if FE state is > prepare */
2637         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2638                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2639                 return 0;
2640
2641         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2642                 /* call trigger on the frontend - FE takes care of all BE triggers */
2643                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2644                                 fe->dai_link->name);
2645
2646                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2647                 if (ret < 0) {
2648                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2649                         goto hw_free;
2650                 }
2651         } else {
2652                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2653                         fe->dai_link->name);
2654
2655                 ret = dpcm_be_dai_trigger(fe, stream,
2656                                         SNDRV_PCM_TRIGGER_START);
2657                 if (ret < 0) {
2658                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2659                         goto hw_free;
2660                 }
2661         }
2662
2663         return 0;
2664
2665 hw_free:
2666         dpcm_be_dai_hw_free(fe, stream);
2667 close:
2668         dpcm_be_dai_shutdown(fe, stream);
2669 disconnect:
2670         /* disconnect any non started BEs */
2671         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2672         for_each_dpcm_be(fe, stream, dpcm) {
2673                 struct snd_soc_pcm_runtime *be = dpcm->be;
2674                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2675                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2676         }
2677         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2678
2679         return ret;
2680 }
2681
2682 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2683 {
2684         int ret;
2685
2686         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2687         ret = dpcm_run_update_startup(fe, stream);
2688         if (ret < 0)
2689                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2690         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2691
2692         return ret;
2693 }
2694
2695 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2696 {
2697         int ret;
2698
2699         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2700         ret = dpcm_run_update_shutdown(fe, stream);
2701         if (ret < 0)
2702                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2703         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2704
2705         return ret;
2706 }
2707
2708 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2709 {
2710         struct snd_soc_dapm_widget_list *list;
2711         int count, paths;
2712
2713         if (!fe->dai_link->dynamic)
2714                 return 0;
2715
2716         /* only check active links */
2717         if (!fe->cpu_dai->active)
2718                 return 0;
2719
2720         /* DAPM sync will call this to update DSP paths */
2721         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2722                 new ? "new" : "old", fe->dai_link->name);
2723
2724         /* skip if FE doesn't have playback capability */
2725         if (!fe->cpu_dai->driver->playback.channels_min ||
2726             !fe->codec_dai->driver->playback.channels_min)
2727                 goto capture;
2728
2729         /* skip if FE isn't currently playing */
2730         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2731                 goto capture;
2732
2733         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2734         if (paths < 0) {
2735                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2736                          fe->dai_link->name,  "playback");
2737                 return paths;
2738         }
2739
2740         /* update any playback paths */
2741         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2742         if (count) {
2743                 if (new)
2744                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2745                 else
2746                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2747
2748                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2749                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2750         }
2751
2752         dpcm_path_put(&list);
2753
2754 capture:
2755         /* skip if FE doesn't have capture capability */
2756         if (!fe->cpu_dai->driver->capture.channels_min ||
2757             !fe->codec_dai->driver->capture.channels_min)
2758                 return 0;
2759
2760         /* skip if FE isn't currently capturing */
2761         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2762                 return 0;
2763
2764         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2765         if (paths < 0) {
2766                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2767                          fe->dai_link->name,  "capture");
2768                 return paths;
2769         }
2770
2771         /* update any old capture paths */
2772         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2773         if (count) {
2774                 if (new)
2775                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2776                 else
2777                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2778
2779                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2780                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2781         }
2782
2783         dpcm_path_put(&list);
2784
2785         return 0;
2786 }
2787
2788 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2789  * any DAI links.
2790  */
2791 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2792 {
2793         struct snd_soc_pcm_runtime *fe;
2794         int ret = 0;
2795
2796         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2797         /* shutdown all old paths first */
2798         for_each_card_rtds(card, fe) {
2799                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2800                 if (ret)
2801                         goto out;
2802         }
2803
2804         /* bring new paths up */
2805         for_each_card_rtds(card, fe) {
2806                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2807                 if (ret)
2808                         goto out;
2809         }
2810
2811 out:
2812         mutex_unlock(&card->mutex);
2813         return ret;
2814 }
2815 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2816 {
2817         struct snd_soc_dpcm *dpcm;
2818         struct snd_soc_dai *dai;
2819
2820         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2821
2822                 struct snd_soc_pcm_runtime *be = dpcm->be;
2823                 int i;
2824
2825                 if (be->dai_link->ignore_suspend)
2826                         continue;
2827
2828                 for_each_rtd_codec_dai(be, i, dai) {
2829                         struct snd_soc_dai_driver *drv = dai->driver;
2830
2831                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2832                                          be->dai_link->name);
2833
2834                         if (drv->ops && drv->ops->digital_mute &&
2835                                                         dai->playback_active)
2836                                 drv->ops->digital_mute(dai, mute);
2837                 }
2838         }
2839
2840         return 0;
2841 }
2842
2843 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2844 {
2845         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2846         struct snd_soc_dpcm *dpcm;
2847         struct snd_soc_dapm_widget_list *list;
2848         int ret;
2849         int stream = fe_substream->stream;
2850
2851         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2852         fe->dpcm[stream].runtime = fe_substream->runtime;
2853
2854         ret = dpcm_path_get(fe, stream, &list);
2855         if (ret < 0) {
2856                 mutex_unlock(&fe->card->mutex);
2857                 return ret;
2858         } else if (ret == 0) {
2859                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2860                         fe->dai_link->name, stream ? "capture" : "playback");
2861         }
2862
2863         /* calculate valid and active FE <-> BE dpcms */
2864         dpcm_process_paths(fe, stream, &list, 1);
2865
2866         ret = dpcm_fe_dai_startup(fe_substream);
2867         if (ret < 0) {
2868                 /* clean up all links */
2869                 for_each_dpcm_be(fe, stream, dpcm)
2870                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2871
2872                 dpcm_be_disconnect(fe, stream);
2873                 fe->dpcm[stream].runtime = NULL;
2874         }
2875
2876         dpcm_clear_pending_state(fe, stream);
2877         dpcm_path_put(&list);
2878         mutex_unlock(&fe->card->mutex);
2879         return ret;
2880 }
2881
2882 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2883 {
2884         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2885         struct snd_soc_dpcm *dpcm;
2886         int stream = fe_substream->stream, ret;
2887
2888         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2889         ret = dpcm_fe_dai_shutdown(fe_substream);
2890
2891         /* mark FE's links ready to prune */
2892         for_each_dpcm_be(fe, stream, dpcm)
2893                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2894
2895         dpcm_be_disconnect(fe, stream);
2896
2897         fe->dpcm[stream].runtime = NULL;
2898         mutex_unlock(&fe->card->mutex);
2899         return ret;
2900 }
2901
2902 static void soc_pcm_private_free(struct snd_pcm *pcm)
2903 {
2904         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2905         struct snd_soc_rtdcom_list *rtdcom;
2906         struct snd_soc_component *component;
2907
2908         /* need to sync the delayed work before releasing resources */
2909         flush_delayed_work(&rtd->delayed_work);
2910         for_each_rtdcom(rtd, rtdcom) {
2911                 component = rtdcom->component;
2912
2913                 if (component->driver->pcm_free)
2914                         component->driver->pcm_free(pcm);
2915         }
2916 }
2917
2918 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2919 {
2920         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2921         struct snd_soc_rtdcom_list *rtdcom;
2922         struct snd_soc_component *component;
2923
2924         for_each_rtdcom(rtd, rtdcom) {
2925                 component = rtdcom->component;
2926
2927                 if (!component->driver->ops ||
2928                     !component->driver->ops->ack)
2929                         continue;
2930
2931                 /* FIXME. it returns 1st ask now */
2932                 return component->driver->ops->ack(substream);
2933         }
2934
2935         return -EINVAL;
2936 }
2937
2938 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2939                                 unsigned long pos, void __user *buf,
2940                                 unsigned long bytes)
2941 {
2942         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2943         struct snd_soc_rtdcom_list *rtdcom;
2944         struct snd_soc_component *component;
2945
2946         for_each_rtdcom(rtd, rtdcom) {
2947                 component = rtdcom->component;
2948
2949                 if (!component->driver->ops ||
2950                     !component->driver->ops->copy_user)
2951                         continue;
2952
2953                 /* FIXME. it returns 1st copy now */
2954                 return component->driver->ops->copy_user(substream, channel,
2955                                                          pos, buf, bytes);
2956         }
2957
2958         return -EINVAL;
2959 }
2960
2961 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
2962                                   unsigned long pos, void *buf, unsigned long bytes)
2963 {
2964         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2965         struct snd_soc_rtdcom_list *rtdcom;
2966         struct snd_soc_component *component;
2967
2968         for_each_rtdcom(rtd, rtdcom) {
2969                 component = rtdcom->component;
2970
2971                 if (!component->driver->ops ||
2972                     !component->driver->ops->copy_kernel)
2973                         continue;
2974
2975                 /* FIXME. it returns 1st copy now */
2976                 return component->driver->ops->copy_kernel(substream, channel,
2977                                                            pos, buf, bytes);
2978         }
2979
2980         return -EINVAL;
2981 }
2982
2983 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
2984                                    unsigned long pos, unsigned long bytes)
2985 {
2986         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2987         struct snd_soc_rtdcom_list *rtdcom;
2988         struct snd_soc_component *component;
2989
2990         for_each_rtdcom(rtd, rtdcom) {
2991                 component = rtdcom->component;
2992
2993                 if (!component->driver->ops ||
2994                     !component->driver->ops->fill_silence)
2995                         continue;
2996
2997                 /* FIXME. it returns 1st silence now */
2998                 return component->driver->ops->fill_silence(substream, channel,
2999                                                             pos, bytes);
3000         }
3001
3002         return -EINVAL;
3003 }
3004
3005 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
3006                                     unsigned long offset)
3007 {
3008         struct snd_soc_pcm_runtime *rtd = substream->private_data;
3009         struct snd_soc_rtdcom_list *rtdcom;
3010         struct snd_soc_component *component;
3011         struct page *page;
3012
3013         for_each_rtdcom(rtd, rtdcom) {
3014                 component = rtdcom->component;
3015
3016                 if (!component->driver->ops ||
3017                     !component->driver->ops->page)
3018                         continue;
3019
3020                 /* FIXME. it returns 1st page now */
3021                 page = component->driver->ops->page(substream, offset);
3022                 if (page)
3023                         return page;
3024         }
3025
3026         return NULL;
3027 }
3028
3029 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
3030                            struct vm_area_struct *vma)
3031 {
3032         struct snd_soc_pcm_runtime *rtd = substream->private_data;
3033         struct snd_soc_rtdcom_list *rtdcom;
3034         struct snd_soc_component *component;
3035
3036         for_each_rtdcom(rtd, rtdcom) {
3037                 component = rtdcom->component;
3038
3039                 if (!component->driver->ops ||
3040                     !component->driver->ops->mmap)
3041                         continue;
3042
3043                 /* FIXME. it returns 1st mmap now */
3044                 return component->driver->ops->mmap(substream, vma);
3045         }
3046
3047         return -EINVAL;
3048 }
3049
3050 /* create a new pcm */
3051 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
3052 {
3053         struct snd_soc_dai *codec_dai;
3054         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3055         struct snd_soc_component *component;
3056         struct snd_soc_rtdcom_list *rtdcom;
3057         struct snd_pcm *pcm;
3058         char new_name[64];
3059         int ret = 0, playback = 0, capture = 0;
3060         int i;
3061
3062         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
3063                 playback = rtd->dai_link->dpcm_playback;
3064                 capture = rtd->dai_link->dpcm_capture;
3065         } else {
3066                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
3067                         if (codec_dai->driver->playback.channels_min)
3068                                 playback = 1;
3069                         if (codec_dai->driver->capture.channels_min)
3070                                 capture = 1;
3071                 }
3072
3073                 capture = capture && cpu_dai->driver->capture.channels_min;
3074                 playback = playback && cpu_dai->driver->playback.channels_min;
3075         }
3076
3077         if (rtd->dai_link->playback_only) {
3078                 playback = 1;
3079                 capture = 0;
3080         }
3081
3082         if (rtd->dai_link->capture_only) {
3083                 playback = 0;
3084                 capture = 1;
3085         }
3086
3087         /* create the PCM */
3088         if (rtd->dai_link->no_pcm) {
3089                 snprintf(new_name, sizeof(new_name), "(%s)",
3090                         rtd->dai_link->stream_name);
3091
3092                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
3093                                 playback, capture, &pcm);
3094         } else {
3095                 if (rtd->dai_link->dynamic)
3096                         snprintf(new_name, sizeof(new_name), "%s (*)",
3097                                 rtd->dai_link->stream_name);
3098                 else
3099                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
3100                                 rtd->dai_link->stream_name,
3101                                 (rtd->num_codecs > 1) ?
3102                                 "multicodec" : rtd->codec_dai->name, num);
3103
3104                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
3105                         capture, &pcm);
3106         }
3107         if (ret < 0) {
3108                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
3109                         rtd->dai_link->name);
3110                 return ret;
3111         }
3112         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
3113
3114         /* DAPM dai link stream work */
3115         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
3116
3117         pcm->nonatomic = rtd->dai_link->nonatomic;
3118         rtd->pcm = pcm;
3119         pcm->private_data = rtd;
3120
3121         if (rtd->dai_link->no_pcm) {
3122                 if (playback)
3123                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
3124                 if (capture)
3125                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3126                 goto out;
3127         }
3128
3129         /* ASoC PCM operations */
3130         if (rtd->dai_link->dynamic) {
3131                 rtd->ops.open           = dpcm_fe_dai_open;
3132                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
3133                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
3134                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
3135                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
3136                 rtd->ops.close          = dpcm_fe_dai_close;
3137                 rtd->ops.pointer        = soc_pcm_pointer;
3138                 rtd->ops.ioctl          = soc_pcm_ioctl;
3139         } else {
3140                 rtd->ops.open           = soc_pcm_open;
3141                 rtd->ops.hw_params      = soc_pcm_hw_params;
3142                 rtd->ops.prepare        = soc_pcm_prepare;
3143                 rtd->ops.trigger        = soc_pcm_trigger;
3144                 rtd->ops.hw_free        = soc_pcm_hw_free;
3145                 rtd->ops.close          = soc_pcm_close;
3146                 rtd->ops.pointer        = soc_pcm_pointer;
3147                 rtd->ops.ioctl          = soc_pcm_ioctl;
3148         }
3149
3150         for_each_rtdcom(rtd, rtdcom) {
3151                 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
3152
3153                 if (!ops)
3154                         continue;
3155
3156                 if (ops->ack)
3157                         rtd->ops.ack            = soc_rtdcom_ack;
3158                 if (ops->copy_user)
3159                         rtd->ops.copy_user      = soc_rtdcom_copy_user;
3160                 if (ops->copy_kernel)
3161                         rtd->ops.copy_kernel    = soc_rtdcom_copy_kernel;
3162                 if (ops->fill_silence)
3163                         rtd->ops.fill_silence   = soc_rtdcom_fill_silence;
3164                 if (ops->page)
3165                         rtd->ops.page           = soc_rtdcom_page;
3166                 if (ops->mmap)
3167                         rtd->ops.mmap           = soc_rtdcom_mmap;
3168         }
3169
3170         if (playback)
3171                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3172
3173         if (capture)
3174                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3175
3176         for_each_rtdcom(rtd, rtdcom) {
3177                 component = rtdcom->component;
3178
3179                 if (!component->driver->pcm_new)
3180                         continue;
3181
3182                 ret = component->driver->pcm_new(rtd);
3183                 if (ret < 0) {
3184                         dev_err(component->dev,
3185                                 "ASoC: pcm constructor failed: %d\n",
3186                                 ret);
3187                         return ret;
3188                 }
3189         }
3190
3191         pcm->private_free = soc_pcm_private_free;
3192         pcm->no_device_suspend = true;
3193 out:
3194         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3195                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3196                  cpu_dai->name);
3197         return ret;
3198 }
3199
3200 /* is the current PCM operation for this FE ? */
3201 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3202 {
3203         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3204                 return 1;
3205         return 0;
3206 }
3207 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3208
3209 /* is the current PCM operation for this BE ? */
3210 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3211                 struct snd_soc_pcm_runtime *be, int stream)
3212 {
3213         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3214            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3215                   be->dpcm[stream].runtime_update))
3216                 return 1;
3217         return 0;
3218 }
3219 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3220
3221 /* get the substream for this BE */
3222 struct snd_pcm_substream *
3223         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3224 {
3225         return be->pcm->streams[stream].substream;
3226 }
3227 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3228
3229 /* get the BE runtime state */
3230 enum snd_soc_dpcm_state
3231         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3232 {
3233         return be->dpcm[stream].state;
3234 }
3235 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3236
3237 /* set the BE runtime state */
3238 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3239                 int stream, enum snd_soc_dpcm_state state)
3240 {
3241         be->dpcm[stream].state = state;
3242 }
3243 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3244
3245 /*
3246  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3247  * are not running, paused or suspended for the specified stream direction.
3248  */
3249 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3250                 struct snd_soc_pcm_runtime *be, int stream)
3251 {
3252         struct snd_soc_dpcm *dpcm;
3253         int state;
3254         int ret = 1;
3255         unsigned long flags;
3256
3257         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3258         for_each_dpcm_fe(be, stream, dpcm) {
3259
3260                 if (dpcm->fe == fe)
3261                         continue;
3262
3263                 state = dpcm->fe->dpcm[stream].state;
3264                 if (state == SND_SOC_DPCM_STATE_START ||
3265                         state == SND_SOC_DPCM_STATE_PAUSED ||
3266                         state == SND_SOC_DPCM_STATE_SUSPEND) {
3267                         ret = 0;
3268                         break;
3269                 }
3270         }
3271         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3272
3273         /* it's safe to free/stop this BE DAI */
3274         return ret;
3275 }
3276 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3277
3278 /*
3279  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3280  * running, paused or suspended for the specified stream direction.
3281  */
3282 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3283                 struct snd_soc_pcm_runtime *be, int stream)
3284 {
3285         struct snd_soc_dpcm *dpcm;
3286         int state;
3287         int ret = 1;
3288         unsigned long flags;
3289
3290         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3291         for_each_dpcm_fe(be, stream, dpcm) {
3292
3293                 if (dpcm->fe == fe)
3294                         continue;
3295
3296                 state = dpcm->fe->dpcm[stream].state;
3297                 if (state == SND_SOC_DPCM_STATE_START ||
3298                         state == SND_SOC_DPCM_STATE_PAUSED ||
3299                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3300                         state == SND_SOC_DPCM_STATE_PREPARE) {
3301                         ret = 0;
3302                         break;
3303                 }
3304         }
3305         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3306
3307         /* it's safe to change hw_params */
3308         return ret;
3309 }
3310 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3311
3312 #ifdef CONFIG_DEBUG_FS
3313 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3314 {
3315         switch (state) {
3316         case SND_SOC_DPCM_STATE_NEW:
3317                 return "new";
3318         case SND_SOC_DPCM_STATE_OPEN:
3319                 return "open";
3320         case SND_SOC_DPCM_STATE_HW_PARAMS:
3321                 return "hw_params";
3322         case SND_SOC_DPCM_STATE_PREPARE:
3323                 return "prepare";
3324         case SND_SOC_DPCM_STATE_START:
3325                 return "start";
3326         case SND_SOC_DPCM_STATE_STOP:
3327                 return "stop";
3328         case SND_SOC_DPCM_STATE_SUSPEND:
3329                 return "suspend";
3330         case SND_SOC_DPCM_STATE_PAUSED:
3331                 return "paused";
3332         case SND_SOC_DPCM_STATE_HW_FREE:
3333                 return "hw_free";
3334         case SND_SOC_DPCM_STATE_CLOSE:
3335                 return "close";
3336         }
3337
3338         return "unknown";
3339 }
3340
3341 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3342                                 int stream, char *buf, size_t size)
3343 {
3344         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3345         struct snd_soc_dpcm *dpcm;
3346         ssize_t offset = 0;
3347         unsigned long flags;
3348
3349         /* FE state */
3350         offset += snprintf(buf + offset, size - offset,
3351                         "[%s - %s]\n", fe->dai_link->name,
3352                         stream ? "Capture" : "Playback");
3353
3354         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3355                         dpcm_state_string(fe->dpcm[stream].state));
3356
3357         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3358             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3359                 offset += snprintf(buf + offset, size - offset,
3360                                 "Hardware Params: "
3361                                 "Format = %s, Channels = %d, Rate = %d\n",
3362                                 snd_pcm_format_name(params_format(params)),
3363                                 params_channels(params),
3364                                 params_rate(params));
3365
3366         /* BEs state */
3367         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3368
3369         if (list_empty(&fe->dpcm[stream].be_clients)) {
3370                 offset += snprintf(buf + offset, size - offset,
3371                                 " No active DSP links\n");
3372                 goto out;
3373         }
3374
3375         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3376         for_each_dpcm_be(fe, stream, dpcm) {
3377                 struct snd_soc_pcm_runtime *be = dpcm->be;
3378                 params = &dpcm->hw_params;
3379
3380                 offset += snprintf(buf + offset, size - offset,
3381                                 "- %s\n", be->dai_link->name);
3382
3383                 offset += snprintf(buf + offset, size - offset,
3384                                 "   State: %s\n",
3385                                 dpcm_state_string(be->dpcm[stream].state));
3386
3387                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3388                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3389                         offset += snprintf(buf + offset, size - offset,
3390                                 "   Hardware Params: "
3391                                 "Format = %s, Channels = %d, Rate = %d\n",
3392                                 snd_pcm_format_name(params_format(params)),
3393                                 params_channels(params),
3394                                 params_rate(params));
3395         }
3396         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3397 out:
3398         return offset;
3399 }
3400
3401 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3402                                 size_t count, loff_t *ppos)
3403 {
3404         struct snd_soc_pcm_runtime *fe = file->private_data;
3405         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3406         char *buf;
3407
3408         buf = kmalloc(out_count, GFP_KERNEL);
3409         if (!buf)
3410                 return -ENOMEM;
3411
3412         if (fe->cpu_dai->driver->playback.channels_min)
3413                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3414                                         buf + offset, out_count - offset);
3415
3416         if (fe->cpu_dai->driver->capture.channels_min)
3417                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3418                                         buf + offset, out_count - offset);
3419
3420         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3421
3422         kfree(buf);
3423         return ret;
3424 }
3425
3426 static const struct file_operations dpcm_state_fops = {
3427         .open = simple_open,
3428         .read = dpcm_state_read_file,
3429         .llseek = default_llseek,
3430 };
3431
3432 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3433 {
3434         if (!rtd->dai_link)
3435                 return;
3436
3437         if (!rtd->card->debugfs_card_root)
3438                 return;
3439
3440         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3441                         rtd->card->debugfs_card_root);
3442         if (!rtd->debugfs_dpcm_root) {
3443                 dev_dbg(rtd->dev,
3444                          "ASoC: Failed to create dpcm debugfs directory %s\n",
3445                          rtd->dai_link->name);
3446                 return;
3447         }
3448
3449         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3450                             rtd, &dpcm_state_fops);
3451 }
3452 #endif