sound/soc/soc-pcm.c

   1 /*
   2  * soc-pcm.c  --  ALSA SoC PCM
   3  *
   4  * Copyright 2005 Wolfson Microelectronics PLC.
   5  * Copyright 2005 Openedhand Ltd.
   6  * Copyright (C) 2010 Slimlogic Ltd.
   7  * Copyright (C) 2010 Texas Instruments Inc.
   8  *
   9  * Authors: Liam Girdwood <lrg@ti.com>
  10  *          Mark Brown <broonie@opensource.wolfsonmicro.com>
  11  *
  12  *  This program is free software; you can redistribute  it and/or modify it
  13  *  under  the terms of  the GNU General  Public License as published by the
  14  *  Free Software Foundation;  either version 2 of the  License, or (at your
  15  *  option) any later version.
  16  *
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/delay.h>
  22 #include <linux/pinctrl/consumer.h>
  23 #include <linux/pm_runtime.h>
  24 #include <linux/slab.h>
  25 #include <linux/workqueue.h>
  26 #include <linux/export.h>
  27 #include <linux/debugfs.h>
  28 #include <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/pcm_params.h>
  31 #include <sound/soc.h>
  32 #include <sound/soc-dpcm.h>
  33 #include <sound/initval.h>
  34
  35 #define DPCM_MAX_BE_USERS       8
  36
  37 /*
  38  * snd_soc_dai_stream_valid() - check if a DAI supports the given stream
  39  *
  40  * Returns true if the DAI supports the indicated stream type.
  41  */
  42 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
  43 {
  44         struct snd_soc_pcm_stream *codec_stream;
  45
  46         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
  47                 codec_stream = &dai->driver->playback;
  48         else
  49                 codec_stream = &dai->driver->capture;
  50
  51         /* If the codec specifies any rate at all, it supports the stream. */
  52         return codec_stream->rates;
  53 }
  54
  55 /**
  56  * snd_soc_runtime_activate() - Increment active count for PCM runtime components
  57  * @rtd: ASoC PCM runtime that is activated
  58  * @stream: Direction of the PCM stream
  59  *
  60  * Increments the active count for all the DAIs and components attached to a PCM
  61  * runtime. Should typically be called when a stream is opened.
  62  *
  63  * Must be called with the rtd->pcm_mutex being held
  64  */
  65 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
  66 {
  67         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  68         int i;
  69
  70         lockdep_assert_held(&rtd->pcm_mutex);
  71
  72         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  73                 cpu_dai->playback_active++;
  74                 for (i = 0; i < rtd->num_codecs; i++)
  75                         rtd->codec_dais[i]->playback_active++;
  76         } else {
  77                 cpu_dai->capture_active++;
  78                 for (i = 0; i < rtd->num_codecs; i++)
  79                         rtd->codec_dais[i]->capture_active++;
  80         }
  81
  82         cpu_dai->active++;
  83         cpu_dai->component->active++;
  84         for (i = 0; i < rtd->num_codecs; i++) {
  85                 rtd->codec_dais[i]->active++;
  86                 rtd->codec_dais[i]->component->active++;
  87         }
  88 }
  89
  90 /**
  91  * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
  92  * @rtd: ASoC PCM runtime that is deactivated
  93  * @stream: Direction of the PCM stream
  94  *
  95  * Decrements the active count for all the DAIs and components attached to a PCM
  96  * runtime. Should typically be called when a stream is closed.
  97  *
  98  * Must be called with the rtd->pcm_mutex being held
  99  */
 100 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
 101 {
 102         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 103         int i;
 104
 105         lockdep_assert_held(&rtd->pcm_mutex);
 106
 107         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 108                 cpu_dai->playback_active--;
 109                 for (i = 0; i < rtd->num_codecs; i++)
 110                         rtd->codec_dais[i]->playback_active--;
 111         } else {
 112                 cpu_dai->capture_active--;
 113                 for (i = 0; i < rtd->num_codecs; i++)
 114                         rtd->codec_dais[i]->capture_active--;
 115         }
 116
 117         cpu_dai->active--;
 118         cpu_dai->component->active--;
 119         for (i = 0; i < rtd->num_codecs; i++) {
 120                 rtd->codec_dais[i]->component->active--;
 121                 rtd->codec_dais[i]->active--;
 122         }
 123 }
 124
 125 /**
 126  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
 127  * @rtd: The ASoC PCM runtime that should be checked.
 128  *
 129  * This function checks whether the power down delay should be ignored for a
 130  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
 131  * been configured to ignore the delay, or if none of the components benefits
 132  * from having the delay.
 133  */
 134 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
 135 {
 136         struct snd_soc_rtdcom_list *rtdcom;
 137         struct snd_soc_component *component;
 138         int i;
 139         bool ignore = true;
 140
 141         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
 142                 return true;
 143
 144         for_each_rtdcom(rtd, rtdcom) {
 145                 component = rtdcom->component;
 146
 147                 ignore &= !component->driver->use_pmdown_time;
 148         }
 149
 150         /* this will be removed */
 151         for (i = 0; i < rtd->num_codecs; i++)
 152                 ignore &= rtd->codec_dais[i]->component->ignore_pmdown_time;
 153
 154         return ignore;
 155 }
 156
 157 /**
 158  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 159  * @substream: the pcm substream
 160  * @hw: the hardware parameters
 161  *
 162  * Sets the substream runtime hardware parameters.
 163  */
 164 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 165         const struct snd_pcm_hardware *hw)
 166 {
 167         struct snd_pcm_runtime *runtime = substream->runtime;
 168         runtime->hw.info = hw->info;
 169         runtime->hw.formats = hw->formats;
 170         runtime->hw.period_bytes_min = hw->period_bytes_min;
 171         runtime->hw.period_bytes_max = hw->period_bytes_max;
 172         runtime->hw.periods_min = hw->periods_min;
 173         runtime->hw.periods_max = hw->periods_max;
 174         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
 175         runtime->hw.fifo_size = hw->fifo_size;
 176         return 0;
 177 }
 178 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 179
 180 /* DPCM stream event, send event to FE and all active BEs. */
 181 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
 182         int event)
 183 {
 184         struct snd_soc_dpcm *dpcm;
 185
 186         list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
 187
 188                 struct snd_soc_pcm_runtime *be = dpcm->be;
 189
 190                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
 191                                 be->dai_link->name, event, dir);
 192
 193                 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
 194                     (be->dpcm[dir].users >= 1))
 195                         continue;
 196
 197                 snd_soc_dapm_stream_event(be, dir, event);
 198         }
 199
 200         snd_soc_dapm_stream_event(fe, dir, event);
 201
 202         return 0;
 203 }
 204
 205 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
 206                                         struct snd_soc_dai *soc_dai)
 207 {
 208         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 209         int ret;
 210
 211         if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
 212                                 rtd->dai_link->symmetric_rates)) {
 213                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
 214                                 soc_dai->rate);
 215
 216                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 217                                                 SNDRV_PCM_HW_PARAM_RATE,
 218                                                 soc_dai->rate);
 219                 if (ret < 0) {
 220                         dev_err(soc_dai->dev,
 221                                 "ASoC: Unable to apply rate constraint: %d\n",
 222                                 ret);
 223                         return ret;
 224                 }
 225         }
 226
 227         if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
 228                                 rtd->dai_link->symmetric_channels)) {
 229                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
 230                                 soc_dai->channels);
 231
 232                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 233                                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 234                                                 soc_dai->channels);
 235                 if (ret < 0) {
 236                         dev_err(soc_dai->dev,
 237                                 "ASoC: Unable to apply channel symmetry constraint: %d\n",
 238                                 ret);
 239                         return ret;
 240                 }
 241         }
 242
 243         if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
 244                                 rtd->dai_link->symmetric_samplebits)) {
 245                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
 246                                 soc_dai->sample_bits);
 247
 248                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 249                                                 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 250                                                 soc_dai->sample_bits);
 251                 if (ret < 0) {
 252                         dev_err(soc_dai->dev,
 253                                 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
 254                                 ret);
 255                         return ret;
 256                 }
 257         }
 258
 259         return 0;
 260 }
 261
 262 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 263                                 struct snd_pcm_hw_params *params)
 264 {
 265         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 266         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 267         unsigned int rate, channels, sample_bits, symmetry, i;
 268
 269         rate = params_rate(params);
 270         channels = params_channels(params);
 271         sample_bits = snd_pcm_format_physical_width(params_format(params));
 272
 273         /* reject unmatched parameters when applying symmetry */
 274         symmetry = cpu_dai->driver->symmetric_rates ||
 275                 rtd->dai_link->symmetric_rates;
 276
 277         for (i = 0; i < rtd->num_codecs; i++)
 278                 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
 279
 280         if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
 281                 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
 282                                 cpu_dai->rate, rate);
 283                 return -EINVAL;
 284         }
 285
 286         symmetry = cpu_dai->driver->symmetric_channels ||
 287                 rtd->dai_link->symmetric_channels;
 288
 289         for (i = 0; i < rtd->num_codecs; i++)
 290                 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
 291
 292         if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
 293                 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
 294                                 cpu_dai->channels, channels);
 295                 return -EINVAL;
 296         }
 297
 298         symmetry = cpu_dai->driver->symmetric_samplebits ||
 299                 rtd->dai_link->symmetric_samplebits;
 300
 301         for (i = 0; i < rtd->num_codecs; i++)
 302                 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
 303
 304         if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
 305                 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
 306                                 cpu_dai->sample_bits, sample_bits);
 307                 return -EINVAL;
 308         }
 309
 310         return 0;
 311 }
 312
 313 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
 314 {
 315         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 316         struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
 317         struct snd_soc_dai_link *link = rtd->dai_link;
 318         unsigned int symmetry, i;
 319
 320         symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
 321                 cpu_driver->symmetric_channels || link->symmetric_channels ||
 322                 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
 323
 324         for (i = 0; i < rtd->num_codecs; i++)
 325                 symmetry = symmetry ||
 326                         rtd->codec_dais[i]->driver->symmetric_rates ||
 327                         rtd->codec_dais[i]->driver->symmetric_channels ||
 328                         rtd->codec_dais[i]->driver->symmetric_samplebits;
 329
 330         return symmetry;
 331 }
 332
 333 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
 334 {
 335         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 336         int ret;
 337
 338         if (!bits)
 339                 return;
 340
 341         ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
 342         if (ret != 0)
 343                 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
 344                                  bits, ret);
 345 }
 346
 347 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 348 {
 349         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 350         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 351         struct snd_soc_dai *codec_dai;
 352         int i;
 353         unsigned int bits = 0, cpu_bits;
 354
 355         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 356                 for (i = 0; i < rtd->num_codecs; i++) {
 357                         codec_dai = rtd->codec_dais[i];
 358                         if (codec_dai->driver->playback.sig_bits == 0) {
 359                                 bits = 0;
 360                                 break;
 361                         }
 362                         bits = max(codec_dai->driver->playback.sig_bits, bits);
 363                 }
 364                 cpu_bits = cpu_dai->driver->playback.sig_bits;
 365         } else {
 366                 for (i = 0; i < rtd->num_codecs; i++) {
 367                         codec_dai = rtd->codec_dais[i];
 368                         if (codec_dai->driver->capture.sig_bits == 0) {
 369                                 bits = 0;
 370                                 break;
 371                         }
 372                         bits = max(codec_dai->driver->capture.sig_bits, bits);
 373                 }
 374                 cpu_bits = cpu_dai->driver->capture.sig_bits;
 375         }
 376
 377         soc_pcm_set_msb(substream, bits);
 378         soc_pcm_set_msb(substream, cpu_bits);
 379 }
 380
 381 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 382 {
 383         struct snd_pcm_runtime *runtime = substream->runtime;
 384         struct snd_pcm_hardware *hw = &runtime->hw;
 385         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 386         struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
 387         struct snd_soc_dai_driver *codec_dai_drv;
 388         struct snd_soc_pcm_stream *codec_stream;
 389         struct snd_soc_pcm_stream *cpu_stream;
 390         unsigned int chan_min = 0, chan_max = UINT_MAX;
 391         unsigned int rate_min = 0, rate_max = UINT_MAX;
 392         unsigned int rates = UINT_MAX;
 393         u64 formats = ULLONG_MAX;
 394         int i;
 395
 396         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 397                 cpu_stream = &cpu_dai_drv->playback;
 398         else
 399                 cpu_stream = &cpu_dai_drv->capture;
 400
 401         /* first calculate min/max only for CODECs in the DAI link */
 402         for (i = 0; i < rtd->num_codecs; i++) {
 403
 404                 /*
 405                  * Skip CODECs which don't support the current stream type.
 406                  * Otherwise, since the rate, channel, and format values will
 407                  * zero in that case, we would have no usable settings left,
 408                  * causing the resulting setup to fail.
 409                  * At least one CODEC should match, otherwise we should have
 410                  * bailed out on a higher level, since there would be no
 411                  * CODEC to support the transfer direction in that case.
 412                  */
 413                 if (!snd_soc_dai_stream_valid(rtd->codec_dais[i],
 414                                               substream->stream))
 415                         continue;
 416
 417                 codec_dai_drv = rtd->codec_dais[i]->driver;
 418                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 419                         codec_stream = &codec_dai_drv->playback;
 420                 else
 421                         codec_stream = &codec_dai_drv->capture;
 422                 chan_min = max(chan_min, codec_stream->channels_min);
 423                 chan_max = min(chan_max, codec_stream->channels_max);
 424                 rate_min = max(rate_min, codec_stream->rate_min);
 425                 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
 426                 formats &= codec_stream->formats;
 427                 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
 428         }
 429
 430         /*
 431          * chan min/max cannot be enforced if there are multiple CODEC DAIs
 432          * connected to a single CPU DAI, use CPU DAI's directly and let
 433          * channel allocation be fixed up later
 434          */
 435         if (rtd->num_codecs > 1) {
 436                 chan_min = cpu_stream->channels_min;
 437                 chan_max = cpu_stream->channels_max;
 438         }
 439
 440         hw->channels_min = max(chan_min, cpu_stream->channels_min);
 441         hw->channels_max = min(chan_max, cpu_stream->channels_max);
 442         if (hw->formats)
 443                 hw->formats &= formats & cpu_stream->formats;
 444         else
 445                 hw->formats = formats & cpu_stream->formats;
 446         hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
 447
 448         snd_pcm_limit_hw_rates(runtime);
 449
 450         hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
 451         hw->rate_min = max(hw->rate_min, rate_min);
 452         hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
 453         hw->rate_max = min_not_zero(hw->rate_max, rate_max);
 454 }
 455
 456 /*
 457  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 458  * then initialized and any private data can be allocated. This also calls
 459  * startup for the cpu DAI, platform, machine and codec DAI.
 460  */
 461 static int soc_pcm_open(struct snd_pcm_substream *substream)
 462 {
 463         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 464         struct snd_pcm_runtime *runtime = substream->runtime;
 465         struct snd_soc_platform *platform = rtd->platform;
 466         struct snd_soc_component *component;
 467         struct snd_soc_rtdcom_list *rtdcom;
 468         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 469         struct snd_soc_dai *codec_dai;
 470         const char *codec_dai_name = "multicodec";
 471         int i, ret = 0, __ret;
 472
 473         pinctrl_pm_select_default_state(cpu_dai->dev);
 474         for (i = 0; i < rtd->num_codecs; i++)
 475                 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
 476
 477         for_each_rtdcom(rtd, rtdcom) {
 478                 component = rtdcom->component;
 479
 480                 pm_runtime_get_sync(component->dev);
 481         }
 482
 483         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 484
 485         /* startup the audio subsystem */
 486         if (cpu_dai->driver->ops->startup) {
 487                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 488                 if (ret < 0) {
 489                         dev_err(cpu_dai->dev, "ASoC: can't open interface"
 490                                 " %s: %d\n", cpu_dai->name, ret);
 491                         goto out;
 492                 }
 493         }
 494
 495         if (platform && platform->driver->ops && platform->driver->ops->open) {
 496                 ret = platform->driver->ops->open(substream);
 497                 if (ret < 0) {
 498                         dev_err(platform->dev, "ASoC: can't open platform"
 499                                 " %s: %d\n", platform->component.name, ret);
 500                         goto platform_err;
 501                 }
 502         }
 503
 504         ret = 0;
 505         for_each_rtdcom(rtd, rtdcom) {
 506                 component = rtdcom->component;
 507
 508                 /* ignore duplication for now */
 509                 if (platform && (component == &platform->component))
 510                         continue;
 511
 512                 if (!component->driver->ops ||
 513                     !component->driver->ops->open)
 514                         continue;
 515
 516                 __ret = component->driver->ops->open(substream);
 517                 if (__ret < 0) {
 518                         dev_err(component->dev,
 519                                 "ASoC: can't open component %s: %d\n",
 520                                 component->name, ret);
 521                         ret = __ret;
 522                 }
 523         }
 524         if (ret < 0)
 525                 goto component_err;
 526
 527         for (i = 0; i < rtd->num_codecs; i++) {
 528                 codec_dai = rtd->codec_dais[i];
 529                 if (codec_dai->driver->ops->startup) {
 530                         ret = codec_dai->driver->ops->startup(substream,
 531                                                               codec_dai);
 532                         if (ret < 0) {
 533                                 dev_err(codec_dai->dev,
 534                                         "ASoC: can't open codec %s: %d\n",
 535                                         codec_dai->name, ret);
 536                                 goto codec_dai_err;
 537                         }
 538                 }
 539
 540                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 541                         codec_dai->tx_mask = 0;
 542                 else
 543                         codec_dai->rx_mask = 0;
 544         }
 545
 546         if (rtd->dai_link->ops->startup) {
 547                 ret = rtd->dai_link->ops->startup(substream);
 548                 if (ret < 0) {
 549                         pr_err("ASoC: %s startup failed: %d\n",
 550                                rtd->dai_link->name, ret);
 551                         goto machine_err;
 552                 }
 553         }
 554
 555         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 556         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 557                 goto dynamic;
 558
 559         /* Check that the codec and cpu DAIs are compatible */
 560         soc_pcm_init_runtime_hw(substream);
 561
 562         if (rtd->num_codecs == 1)
 563                 codec_dai_name = rtd->codec_dai->name;
 564
 565         if (soc_pcm_has_symmetry(substream))
 566                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 567
 568         ret = -EINVAL;
 569         if (!runtime->hw.rates) {
 570                 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
 571                         codec_dai_name, cpu_dai->name);
 572                 goto config_err;
 573         }
 574         if (!runtime->hw.formats) {
 575                 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
 576                         codec_dai_name, cpu_dai->name);
 577                 goto config_err;
 578         }
 579         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 580             runtime->hw.channels_min > runtime->hw.channels_max) {
 581                 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
 582                                 codec_dai_name, cpu_dai->name);
 583                 goto config_err;
 584         }
 585
 586         soc_pcm_apply_msb(substream);
 587
 588         /* Symmetry only applies if we've already got an active stream. */
 589         if (cpu_dai->active) {
 590                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
 591                 if (ret != 0)
 592                         goto config_err;
 593         }
 594
 595         for (i = 0; i < rtd->num_codecs; i++) {
 596                 if (rtd->codec_dais[i]->active) {
 597                         ret = soc_pcm_apply_symmetry(substream,
 598                                                      rtd->codec_dais[i]);
 599                         if (ret != 0)
 600                                 goto config_err;
 601                 }
 602         }
 603
 604         pr_debug("ASoC: %s <-> %s info:\n",
 605                         codec_dai_name, cpu_dai->name);
 606         pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
 607         pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
 608                  runtime->hw.channels_max);
 609         pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
 610                  runtime->hw.rate_max);
 611
 612 dynamic:
 613
 614         snd_soc_runtime_activate(rtd, substream->stream);
 615
 616         mutex_unlock(&rtd->pcm_mutex);
 617         return 0;
 618
 619 config_err:
 620         if (rtd->dai_link->ops->shutdown)
 621                 rtd->dai_link->ops->shutdown(substream);
 622
 623 machine_err:
 624         i = rtd->num_codecs;
 625
 626 codec_dai_err:
 627         while (--i >= 0) {
 628                 codec_dai = rtd->codec_dais[i];
 629                 if (codec_dai->driver->ops->shutdown)
 630                         codec_dai->driver->ops->shutdown(substream, codec_dai);
 631         }
 632
 633 component_err:
 634         for_each_rtdcom(rtd, rtdcom) {
 635                 component = rtdcom->component;
 636
 637                 /* ignore duplication for now */
 638                 if (platform && (component == &platform->component))
 639                         continue;
 640
 641                 if (!component->driver->ops ||
 642                     !component->driver->ops->close)
 643                         continue;
 644
 645                 component->driver->ops->close(substream);
 646         }
 647
 648         if (platform && platform->driver->ops && platform->driver->ops->close)
 649                 platform->driver->ops->close(substream);
 650
 651 platform_err:
 652         if (cpu_dai->driver->ops->shutdown)
 653                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 654 out:
 655         mutex_unlock(&rtd->pcm_mutex);
 656
 657         for_each_rtdcom(rtd, rtdcom) {
 658                 component = rtdcom->component;
 659
 660                 pm_runtime_mark_last_busy(component->dev);
 661                 pm_runtime_put_autosuspend(component->dev);
 662         }
 663
 664         for (i = 0; i < rtd->num_codecs; i++) {
 665                 if (!rtd->codec_dais[i]->active)
 666                         pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
 667         }
 668         if (!cpu_dai->active)
 669                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 670
 671         return ret;
 672 }
 673
 674 /*
 675  * Power down the audio subsystem pmdown_time msecs after close is called.
 676  * This is to ensure there are no pops or clicks in between any music tracks
 677  * due to DAPM power cycling.
 678  */
 679 static void close_delayed_work(struct work_struct *work)
 680 {
 681         struct snd_soc_pcm_runtime *rtd =
 682                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 683         struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
 684
 685         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 686
 687         dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
 688                  codec_dai->driver->playback.stream_name,
 689                  codec_dai->playback_active ? "active" : "inactive",
 690                  rtd->pop_wait ? "yes" : "no");
 691
 692         /* are we waiting on this codec DAI stream */
 693         if (rtd->pop_wait == 1) {
 694                 rtd->pop_wait = 0;
 695                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 696                                           SND_SOC_DAPM_STREAM_STOP);
 697         }
 698
 699         mutex_unlock(&rtd->pcm_mutex);
 700 }
 701
 702 /*
 703  * Called by ALSA when a PCM substream is closed. Private data can be
 704  * freed here. The cpu DAI, codec DAI, machine and platform are also
 705  * shutdown.
 706  */
 707 static int soc_pcm_close(struct snd_pcm_substream *substream)
 708 {
 709         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 710         struct snd_soc_platform *platform = rtd->platform;
 711         struct snd_soc_component *component;
 712         struct snd_soc_rtdcom_list *rtdcom;
 713         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 714         struct snd_soc_dai *codec_dai;
 715         int i;
 716
 717         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 718
 719         snd_soc_runtime_deactivate(rtd, substream->stream);
 720
 721         /* clear the corresponding DAIs rate when inactive */
 722         if (!cpu_dai->active)
 723                 cpu_dai->rate = 0;
 724
 725         for (i = 0; i < rtd->num_codecs; i++) {
 726                 codec_dai = rtd->codec_dais[i];
 727                 if (!codec_dai->active)
 728                         codec_dai->rate = 0;
 729         }
 730
 731         snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
 732
 733         if (cpu_dai->driver->ops->shutdown)
 734                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 735
 736         for (i = 0; i < rtd->num_codecs; i++) {
 737                 codec_dai = rtd->codec_dais[i];
 738                 if (codec_dai->driver->ops->shutdown)
 739                         codec_dai->driver->ops->shutdown(substream, codec_dai);
 740         }
 741
 742         if (rtd->dai_link->ops->shutdown)
 743                 rtd->dai_link->ops->shutdown(substream);
 744
 745         if (platform && platform->driver->ops && platform->driver->ops->close)
 746                 platform->driver->ops->close(substream);
 747
 748         for_each_rtdcom(rtd, rtdcom) {
 749                 component = rtdcom->component;
 750
 751                 /* ignore duplication for now */
 752                 if (platform && (component == &platform->component))
 753                         continue;
 754
 755                 if (!component->driver->ops ||
 756                     !component->driver->ops->close)
 757                         continue;
 758
 759                 component->driver->ops->close(substream);
 760         }
 761
 762         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 763                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 764                         /* powered down playback stream now */
 765                         snd_soc_dapm_stream_event(rtd,
 766                                                   SNDRV_PCM_STREAM_PLAYBACK,
 767                                                   SND_SOC_DAPM_STREAM_STOP);
 768                 } else {
 769                         /* start delayed pop wq here for playback streams */
 770                         rtd->pop_wait = 1;
 771                         queue_delayed_work(system_power_efficient_wq,
 772                                            &rtd->delayed_work,
 773                                            msecs_to_jiffies(rtd->pmdown_time));
 774                 }
 775         } else {
 776                 /* capture streams can be powered down now */
 777                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 778                                           SND_SOC_DAPM_STREAM_STOP);
 779         }
 780
 781         mutex_unlock(&rtd->pcm_mutex);
 782
 783         for_each_rtdcom(rtd, rtdcom) {
 784                 component = rtdcom->component;
 785
 786                 pm_runtime_mark_last_busy(component->dev);
 787                 pm_runtime_put_autosuspend(component->dev);
 788         }
 789
 790         for (i = 0; i < rtd->num_codecs; i++) {
 791                 if (!rtd->codec_dais[i]->active)
 792                         pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
 793         }
 794         if (!cpu_dai->active)
 795                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 796
 797         return 0;
 798 }
 799
 800 /*
 801  * Called by ALSA when the PCM substream is prepared, can set format, sample
 802  * rate, etc.  This function is non atomic and can be called multiple times,
 803  * it can refer to the runtime info.
 804  */
 805 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 806 {
 807         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 808         struct snd_soc_platform *platform = rtd->platform;
 809         struct snd_soc_component *component;
 810         struct snd_soc_rtdcom_list *rtdcom;
 811         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 812         struct snd_soc_dai *codec_dai;
 813         int i, ret = 0;
 814
 815         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 816
 817         if (rtd->dai_link->ops->prepare) {
 818                 ret = rtd->dai_link->ops->prepare(substream);
 819                 if (ret < 0) {
 820                         dev_err(rtd->card->dev, "ASoC: machine prepare error:"
 821                                 " %d\n", ret);
 822                         goto out;
 823                 }
 824         }
 825
 826         if (platform && platform->driver->ops && platform->driver->ops->prepare) {
 827                 ret = platform->driver->ops->prepare(substream);
 828                 if (ret < 0) {
 829                         dev_err(platform->dev, "ASoC: platform prepare error:"
 830                                 " %d\n", ret);
 831                         goto out;
 832                 }
 833         }
 834
 835         for_each_rtdcom(rtd, rtdcom) {
 836                 component = rtdcom->component;
 837
 838                 /* ignore duplication for now */
 839                 if (platform && (component == &platform->component))
 840                         continue;
 841
 842                 if (!component->driver->ops ||
 843                     !component->driver->ops->prepare)
 844                         continue;
 845
 846                 ret = component->driver->ops->prepare(substream);
 847                 if (ret < 0) {
 848                         dev_err(component->dev,
 849                                 "ASoC: platform prepare error: %d\n", ret);
 850                         goto out;
 851                 }
 852         }
 853
 854         for (i = 0; i < rtd->num_codecs; i++) {
 855                 codec_dai = rtd->codec_dais[i];
 856                 if (codec_dai->driver->ops->prepare) {
 857                         ret = codec_dai->driver->ops->prepare(substream,
 858                                                               codec_dai);
 859                         if (ret < 0) {
 860                                 dev_err(codec_dai->dev,
 861                                         "ASoC: codec DAI prepare error: %d\n",
 862                                         ret);
 863                                 goto out;
 864                         }
 865                 }
 866         }
 867
 868         if (cpu_dai->driver->ops->prepare) {
 869                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 870                 if (ret < 0) {
 871                         dev_err(cpu_dai->dev,
 872                                 "ASoC: cpu DAI prepare error: %d\n", ret);
 873                         goto out;
 874                 }
 875         }
 876
 877         /* cancel any delayed stream shutdown that is pending */
 878         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 879             rtd->pop_wait) {
 880                 rtd->pop_wait = 0;
 881                 cancel_delayed_work(&rtd->delayed_work);
 882         }
 883
 884         snd_soc_dapm_stream_event(rtd, substream->stream,
 885                         SND_SOC_DAPM_STREAM_START);
 886
 887         for (i = 0; i < rtd->num_codecs; i++)
 888                 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
 889                                          substream->stream);
 890         snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
 891
 892 out:
 893         mutex_unlock(&rtd->pcm_mutex);
 894         return ret;
 895 }
 896
 897 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 898                                        unsigned int mask)
 899 {
 900         struct snd_interval *interval;
 901         int channels = hweight_long(mask);
 902
 903         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 904         interval->min = channels;
 905         interval->max = channels;
 906 }
 907
 908 int soc_dai_hw_params(struct snd_pcm_substream *substream,
 909                       struct snd_pcm_hw_params *params,
 910                       struct snd_soc_dai *dai)
 911 {
 912         int ret;
 913
 914         if (dai->driver->ops->hw_params) {
 915                 ret = dai->driver->ops->hw_params(substream, params, dai);
 916                 if (ret < 0) {
 917                         dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
 918                                 dai->name, ret);
 919                         return ret;
 920                 }
 921         }
 922
 923         return 0;
 924 }
 925
 926 /*
 927  * Called by ALSA when the hardware params are set by application. This
 928  * function can also be called multiple times and can allocate buffers
 929  * (using snd_pcm_lib_* ). It's non-atomic.
 930  */
 931 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 932                                 struct snd_pcm_hw_params *params)
 933 {
 934         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 935         struct snd_soc_platform *platform = rtd->platform;
 936         struct snd_soc_component *component;
 937         struct snd_soc_rtdcom_list *rtdcom;
 938         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 939         int i, ret = 0, __ret;
 940
 941         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 942         if (rtd->dai_link->ops->hw_params) {
 943                 ret = rtd->dai_link->ops->hw_params(substream, params);
 944                 if (ret < 0) {
 945                         dev_err(rtd->card->dev, "ASoC: machine hw_params"
 946                                 " failed: %d\n", ret);
 947                         goto out;
 948                 }
 949         }
 950
 951         for (i = 0; i < rtd->num_codecs; i++) {
 952                 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
 953                 struct snd_pcm_hw_params codec_params;
 954
 955                 /*
 956                  * Skip CODECs which don't support the current stream type,
 957                  * the idea being that if a CODEC is not used for the currently
 958                  * set up transfer direction, it should not need to be
 959                  * configured, especially since the configuration used might
 960                  * not even be supported by that CODEC. There may be cases
 961                  * however where a CODEC needs to be set up although it is
 962                  * actually not being used for the transfer, e.g. if a
 963                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
 964                  * for the DAI link including a playback-only CODEC.
 965                  * If this becomes necessary, we will have to augment the
 966                  * machine driver setup with information on how to act, so
 967                  * we can do the right thing here.
 968                  */
 969                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 970                         continue;
 971
 972                 /* copy params for each codec */
 973                 codec_params = *params;
 974
 975                 /* fixup params based on TDM slot masks */
 976                 if (codec_dai->tx_mask)
 977                         soc_pcm_codec_params_fixup(&codec_params,
 978                                                    codec_dai->tx_mask);
 979                 if (codec_dai->rx_mask)
 980                         soc_pcm_codec_params_fixup(&codec_params,
 981                                                    codec_dai->rx_mask);
 982
 983                 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
 984                 if(ret < 0)
 985                         goto codec_err;
 986
 987                 codec_dai->rate = params_rate(&codec_params);
 988                 codec_dai->channels = params_channels(&codec_params);
 989                 codec_dai->sample_bits = snd_pcm_format_physical_width(
 990                                                 params_format(&codec_params));
 991         }
 992
 993         ret = soc_dai_hw_params(substream, params, cpu_dai);
 994         if (ret < 0)
 995                 goto interface_err;
 996
 997         if (platform && platform->driver->ops && platform->driver->ops->hw_params) {
 998                 ret = platform->driver->ops->hw_params(substream, params);
 999                 if (ret < 0) {
1000                         dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
1001                                platform->component.name, ret);
1002                         goto platform_err;
1003                 }
1004         }
1005
1006         ret = 0;
1007         for_each_rtdcom(rtd, rtdcom) {
1008                 component = rtdcom->component;
1009
1010                 /* ignore duplication for now */
1011                 if (platform && (component == &platform->component))
1012                         continue;
1013
1014                 if (!component->driver->ops ||
1015                     !component->driver->ops->hw_params)
1016                         continue;
1017
1018                 __ret = component->driver->ops->hw_params(substream, params);
1019                 if (__ret < 0) {
1020                         dev_err(component->dev,
1021                                 "ASoC: %s hw params failed: %d\n",
1022                                 component->name, ret);
1023                         ret = __ret;
1024                 }
1025         }
1026         if (ret < 0)
1027                 goto component_err;
1028
1029         /* store the parameters for each DAIs */
1030         cpu_dai->rate = params_rate(params);
1031         cpu_dai->channels = params_channels(params);
1032         cpu_dai->sample_bits =
1033                 snd_pcm_format_physical_width(params_format(params));
1034
1035         ret = soc_pcm_params_symmetry(substream, params);
1036         if (ret)
1037                 goto component_err;
1038 out:
1039         mutex_unlock(&rtd->pcm_mutex);
1040         return ret;
1041
1042 component_err:
1043         for_each_rtdcom(rtd, rtdcom) {
1044                 component = rtdcom->component;
1045
1046                 /* ignore duplication */
1047                 if (platform && (component == &platform->component))
1048                         continue;
1049
1050                 if (!component->driver->ops ||
1051                     !component->driver->ops->hw_free)
1052                         continue;
1053
1054                 component->driver->ops->hw_free(substream);
1055         }
1056
1057         if (platform && platform->driver->ops && platform->driver->ops->hw_free)
1058                 platform->driver->ops->hw_free(substream);
1059
1060 platform_err:
1061         if (cpu_dai->driver->ops->hw_free)
1062                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1063
1064 interface_err:
1065         i = rtd->num_codecs;
1066
1067 codec_err:
1068         while (--i >= 0) {
1069                 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
1070                 if (codec_dai->driver->ops->hw_free)
1071                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1072                 codec_dai->rate = 0;
1073         }
1074
1075         if (rtd->dai_link->ops->hw_free)
1076                 rtd->dai_link->ops->hw_free(substream);
1077
1078         mutex_unlock(&rtd->pcm_mutex);
1079         return ret;
1080 }
1081
1082 /*
1083  * Frees resources allocated by hw_params, can be called multiple times
1084  */
1085 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1086 {
1087         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1088         struct snd_soc_platform *platform = rtd->platform;
1089         struct snd_soc_component *component;
1090         struct snd_soc_rtdcom_list *rtdcom;
1091         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1092         struct snd_soc_dai *codec_dai;
1093         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1094         int i;
1095
1096         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1097
1098         /* clear the corresponding DAIs parameters when going to be inactive */
1099         if (cpu_dai->active == 1) {
1100                 cpu_dai->rate = 0;
1101                 cpu_dai->channels = 0;
1102                 cpu_dai->sample_bits = 0;
1103         }
1104
1105         for (i = 0; i < rtd->num_codecs; i++) {
1106                 codec_dai = rtd->codec_dais[i];
1107                 if (codec_dai->active == 1) {
1108                         codec_dai->rate = 0;
1109                         codec_dai->channels = 0;
1110                         codec_dai->sample_bits = 0;
1111                 }
1112         }
1113
1114         /* apply codec digital mute */
1115         for (i = 0; i < rtd->num_codecs; i++) {
1116                 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
1117                     (!playback && rtd->codec_dais[i]->capture_active == 1))
1118                         snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
1119                                                  substream->stream);
1120         }
1121
1122         /* free any machine hw params */
1123         if (rtd->dai_link->ops->hw_free)
1124                 rtd->dai_link->ops->hw_free(substream);
1125
1126         /* free any DMA resources */
1127         if (platform && platform->driver->ops && platform->driver->ops->hw_free)
1128                 platform->driver->ops->hw_free(substream);
1129
1130         /* free any component resources */
1131         for_each_rtdcom(rtd, rtdcom) {
1132                 component = rtdcom->component;
1133
1134                 /* ignore duplication for now */
1135                 if (platform && (component == &platform->component))
1136                         continue;
1137
1138                 if (!component->driver->ops ||
1139                     !component->driver->ops->hw_free)
1140                         continue;
1141
1142                 component->driver->ops->hw_free(substream);
1143         }
1144
1145         /* now free hw params for the DAIs  */
1146         for (i = 0; i < rtd->num_codecs; i++) {
1147                 codec_dai = rtd->codec_dais[i];
1148                 if (codec_dai->driver->ops->hw_free)
1149                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1150         }
1151
1152         if (cpu_dai->driver->ops->hw_free)
1153                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1154
1155         mutex_unlock(&rtd->pcm_mutex);
1156         return 0;
1157 }
1158
1159 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1160 {
1161         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1162         struct snd_soc_platform *platform = rtd->platform;
1163         struct snd_soc_component *component;
1164         struct snd_soc_rtdcom_list *rtdcom;
1165         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1166         struct snd_soc_dai *codec_dai;
1167         int i, ret;
1168
1169         for (i = 0; i < rtd->num_codecs; i++) {
1170                 codec_dai = rtd->codec_dais[i];
1171                 if (codec_dai->driver->ops->trigger) {
1172                         ret = codec_dai->driver->ops->trigger(substream,
1173                                                               cmd, codec_dai);
1174                         if (ret < 0)
1175                                 return ret;
1176                 }
1177         }
1178
1179         if (platform && platform->driver->ops && platform->driver->ops->trigger) {
1180                 ret = platform->driver->ops->trigger(substream, cmd);
1181                 if (ret < 0)
1182                         return ret;
1183         }
1184
1185         for_each_rtdcom(rtd, rtdcom) {
1186                 component = rtdcom->component;
1187
1188                 /* ignore duplication for now */
1189                 if (platform && (component == &platform->component))
1190                         continue;
1191
1192                 if (!component->driver->ops ||
1193                     !component->driver->ops->trigger)
1194                         continue;
1195
1196                 ret = component->driver->ops->trigger(substream, cmd);
1197                 if (ret < 0)
1198                         return ret;
1199         }
1200
1201         if (cpu_dai->driver->ops->trigger) {
1202                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1203                 if (ret < 0)
1204                         return ret;
1205         }
1206
1207         if (rtd->dai_link->ops->trigger) {
1208                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1209                 if (ret < 0)
1210                         return ret;
1211         }
1212
1213         return 0;
1214 }
1215
1216 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1217                                    int cmd)
1218 {
1219         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1220         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1221         struct snd_soc_dai *codec_dai;
1222         int i, ret;
1223
1224         for (i = 0; i < rtd->num_codecs; i++) {
1225                 codec_dai = rtd->codec_dais[i];
1226                 if (codec_dai->driver->ops->bespoke_trigger) {
1227                         ret = codec_dai->driver->ops->bespoke_trigger(substream,
1228                                                                 cmd, codec_dai);
1229                         if (ret < 0)
1230                                 return ret;
1231                 }
1232         }
1233
1234         if (cpu_dai->driver->ops->bespoke_trigger) {
1235                 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1236                 if (ret < 0)
1237                         return ret;
1238         }
1239         return 0;
1240 }
1241 /*
1242  * soc level wrapper for pointer callback
1243  * If cpu_dai, codec_dai, platform driver has the delay callback, than
1244  * the runtime->delay will be updated accordingly.
1245  */
1246 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1247 {
1248         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1249         struct snd_soc_platform *platform = rtd->platform;
1250         struct snd_soc_component *component;
1251         struct snd_soc_rtdcom_list *rtdcom;
1252         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1253         struct snd_soc_dai *codec_dai;
1254         struct snd_pcm_runtime *runtime = substream->runtime;
1255         snd_pcm_uframes_t offset = 0;
1256         snd_pcm_sframes_t delay = 0;
1257         snd_pcm_sframes_t codec_delay = 0;
1258         int i;
1259
1260         if (platform && platform->driver->ops && platform->driver->ops->pointer)
1261                 offset = platform->driver->ops->pointer(substream);
1262
1263         for_each_rtdcom(rtd, rtdcom) {
1264                 component = rtdcom->component;
1265
1266                 /* ignore duplication for now */
1267                 if (platform && (component == &platform->component))
1268                         continue;
1269
1270                 if (!component->driver->ops ||
1271                     !component->driver->ops->pointer)
1272                         continue;
1273
1274                 /* FIXME: use 1st pointer */
1275                 offset = component->driver->ops->pointer(substream);
1276                 break;
1277         }
1278
1279         if (cpu_dai->driver->ops->delay)
1280                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1281
1282         for (i = 0; i < rtd->num_codecs; i++) {
1283                 codec_dai = rtd->codec_dais[i];
1284                 if (codec_dai->driver->ops->delay)
1285                         codec_delay = max(codec_delay,
1286                                         codec_dai->driver->ops->delay(substream,
1287                                                                     codec_dai));
1288         }
1289         delay += codec_delay;
1290
1291         runtime->delay = delay;
1292
1293         return offset;
1294 }
1295
1296 /* connect a FE and BE */
1297 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1298                 struct snd_soc_pcm_runtime *be, int stream)
1299 {
1300         struct snd_soc_dpcm *dpcm;
1301
1302         /* only add new dpcms */
1303         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1304                 if (dpcm->be == be && dpcm->fe == fe)
1305                         return 0;
1306         }
1307
1308         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1309         if (!dpcm)
1310                 return -ENOMEM;
1311
1312         dpcm->be = be;
1313         dpcm->fe = fe;
1314         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1315         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1316         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1317         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1318
1319         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1320                         stream ? "capture" : "playback",  fe->dai_link->name,
1321                         stream ? "<-" : "->", be->dai_link->name);
1322
1323 #ifdef CONFIG_DEBUG_FS
1324         if (fe->debugfs_dpcm_root)
1325                 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1326                                 fe->debugfs_dpcm_root, &dpcm->state);
1327 #endif
1328         return 1;
1329 }
1330
1331 /* reparent a BE onto another FE */
1332 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1333                         struct snd_soc_pcm_runtime *be, int stream)
1334 {
1335         struct snd_soc_dpcm *dpcm;
1336         struct snd_pcm_substream *fe_substream, *be_substream;
1337
1338         /* reparent if BE is connected to other FEs */
1339         if (!be->dpcm[stream].users)
1340                 return;
1341
1342         be_substream = snd_soc_dpcm_get_substream(be, stream);
1343
1344         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1345                 if (dpcm->fe == fe)
1346                         continue;
1347
1348                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1349                         stream ? "capture" : "playback",
1350                         dpcm->fe->dai_link->name,
1351                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1352
1353                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1354                 be_substream->runtime = fe_substream->runtime;
1355                 break;
1356         }
1357 }
1358
1359 /* disconnect a BE and FE */
1360 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1361 {
1362         struct snd_soc_dpcm *dpcm, *d;
1363
1364         list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1365                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1366                                 stream ? "capture" : "playback",
1367                                 dpcm->be->dai_link->name);
1368
1369                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1370                         continue;
1371
1372                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1373                         stream ? "capture" : "playback", fe->dai_link->name,
1374                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1375
1376                 /* BEs still alive need new FE */
1377                 dpcm_be_reparent(fe, dpcm->be, stream);
1378
1379 #ifdef CONFIG_DEBUG_FS
1380                 debugfs_remove(dpcm->debugfs_state);
1381 #endif
1382                 list_del(&dpcm->list_be);
1383                 list_del(&dpcm->list_fe);
1384                 kfree(dpcm);
1385         }
1386 }
1387
1388 /* get BE for DAI widget and stream */
1389 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1390                 struct snd_soc_dapm_widget *widget, int stream)
1391 {
1392         struct snd_soc_pcm_runtime *be;
1393         int i;
1394
1395         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1396
1397         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1398                 list_for_each_entry(be, &card->rtd_list, list) {
1399
1400                         if (!be->dai_link->no_pcm)
1401                                 continue;
1402
1403                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1404                                 be->cpu_dai->playback_widget ?
1405                                 be->cpu_dai->playback_widget->name : "(not set)");
1406
1407                         if (be->cpu_dai->playback_widget == widget)
1408                                 return be;
1409
1410                         for (i = 0; i < be->num_codecs; i++) {
1411                                 struct snd_soc_dai *dai = be->codec_dais[i];
1412                                 if (dai->playback_widget == widget)
1413                                         return be;
1414                         }
1415                 }
1416         } else {
1417
1418                 list_for_each_entry(be, &card->rtd_list, list) {
1419
1420                         if (!be->dai_link->no_pcm)
1421                                 continue;
1422
1423                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1424                                 be->cpu_dai->capture_widget ?
1425                                 be->cpu_dai->capture_widget->name : "(not set)");
1426
1427                         if (be->cpu_dai->capture_widget == widget)
1428                                 return be;
1429
1430                         for (i = 0; i < be->num_codecs; i++) {
1431                                 struct snd_soc_dai *dai = be->codec_dais[i];
1432                                 if (dai->capture_widget == widget)
1433                                         return be;
1434                         }
1435                 }
1436         }
1437
1438         /* dai link name and stream name set correctly ? */
1439         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1440                 stream ? "capture" : "playback", widget->name);
1441         return NULL;
1442 }
1443
1444 static inline struct snd_soc_dapm_widget *
1445         dai_get_widget(struct snd_soc_dai *dai, int stream)
1446 {
1447         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1448                 return dai->playback_widget;
1449         else
1450                 return dai->capture_widget;
1451 }
1452
1453 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1454                 struct snd_soc_dapm_widget *widget)
1455 {
1456         int i;
1457
1458         for (i = 0; i < list->num_widgets; i++) {
1459                 if (widget == list->widgets[i])
1460                         return 1;
1461         }
1462
1463         return 0;
1464 }
1465
1466 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1467                 enum snd_soc_dapm_direction dir)
1468 {
1469         struct snd_soc_card *card = widget->dapm->card;
1470         struct snd_soc_pcm_runtime *rtd;
1471         int i;
1472
1473         if (dir == SND_SOC_DAPM_DIR_OUT) {
1474                 list_for_each_entry(rtd, &card->rtd_list, list) {
1475                         if (!rtd->dai_link->no_pcm)
1476                                 continue;
1477
1478                         if (rtd->cpu_dai->playback_widget == widget)
1479                                 return true;
1480
1481                         for (i = 0; i < rtd->num_codecs; ++i) {
1482                                 struct snd_soc_dai *dai = rtd->codec_dais[i];
1483                                 if (dai->playback_widget == widget)
1484                                         return true;
1485                         }
1486                 }
1487         } else { /* SND_SOC_DAPM_DIR_IN */
1488                 list_for_each_entry(rtd, &card->rtd_list, list) {
1489                         if (!rtd->dai_link->no_pcm)
1490                                 continue;
1491
1492                         if (rtd->cpu_dai->capture_widget == widget)
1493                                 return true;
1494
1495                         for (i = 0; i < rtd->num_codecs; ++i) {
1496                                 struct snd_soc_dai *dai = rtd->codec_dais[i];
1497                                 if (dai->capture_widget == widget)
1498                                         return true;
1499                         }
1500                 }
1501         }
1502
1503         return false;
1504 }
1505
1506 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1507         int stream, struct snd_soc_dapm_widget_list **list)
1508 {
1509         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1510         int paths;
1511
1512         /* get number of valid DAI paths and their widgets */
1513         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1514                         dpcm_end_walk_at_be);
1515
1516         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1517                         stream ? "capture" : "playback");
1518
1519         return paths;
1520 }
1521
1522 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1523         struct snd_soc_dapm_widget_list **list_)
1524 {
1525         struct snd_soc_dpcm *dpcm;
1526         struct snd_soc_dapm_widget_list *list = *list_;
1527         struct snd_soc_dapm_widget *widget;
1528         int prune = 0;
1529
1530         /* Destroy any old FE <--> BE connections */
1531         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1532                 unsigned int i;
1533
1534                 /* is there a valid CPU DAI widget for this BE */
1535                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1536
1537                 /* prune the BE if it's no longer in our active list */
1538                 if (widget && widget_in_list(list, widget))
1539                         continue;
1540
1541                 /* is there a valid CODEC DAI widget for this BE */
1542                 for (i = 0; i < dpcm->be->num_codecs; i++) {
1543                         struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1544                         widget = dai_get_widget(dai, stream);
1545
1546                         /* prune the BE if it's no longer in our active list */
1547                         if (widget && widget_in_list(list, widget))
1548                                 continue;
1549                 }
1550
1551                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1552                         stream ? "capture" : "playback",
1553                         dpcm->be->dai_link->name, fe->dai_link->name);
1554                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1555                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1556                 prune++;
1557         }
1558
1559         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1560         return prune;
1561 }
1562
1563 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1564         struct snd_soc_dapm_widget_list **list_)
1565 {
1566         struct snd_soc_card *card = fe->card;
1567         struct snd_soc_dapm_widget_list *list = *list_;
1568         struct snd_soc_pcm_runtime *be;
1569         int i, new = 0, err;
1570
1571         /* Create any new FE <--> BE connections */
1572         for (i = 0; i < list->num_widgets; i++) {
1573
1574                 switch (list->widgets[i]->id) {
1575                 case snd_soc_dapm_dai_in:
1576                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1577                                 continue;
1578                         break;
1579                 case snd_soc_dapm_dai_out:
1580                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1581                                 continue;
1582                         break;
1583                 default:
1584                         continue;
1585                 }
1586
1587                 /* is there a valid BE rtd for this widget */
1588                 be = dpcm_get_be(card, list->widgets[i], stream);
1589                 if (!be) {
1590                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1591                                         list->widgets[i]->name);
1592                         continue;
1593                 }
1594
1595                 /* make sure BE is a real BE */
1596                 if (!be->dai_link->no_pcm)
1597                         continue;
1598
1599                 /* don't connect if FE is not running */
1600                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1601                         continue;
1602
1603                 /* newly connected FE and BE */
1604                 err = dpcm_be_connect(fe, be, stream);
1605                 if (err < 0) {
1606                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1607                                 list->widgets[i]->name);
1608                         break;
1609                 } else if (err == 0) /* already connected */
1610                         continue;
1611
1612                 /* new */
1613                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1614                 new++;
1615         }
1616
1617         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1618         return new;
1619 }
1620
1621 /*
1622  * Find the corresponding BE DAIs that source or sink audio to this
1623  * FE substream.
1624  */
1625 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1626         int stream, struct snd_soc_dapm_widget_list **list, int new)
1627 {
1628         if (new)
1629                 return dpcm_add_paths(fe, stream, list);
1630         else
1631                 return dpcm_prune_paths(fe, stream, list);
1632 }
1633
1634 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1635 {
1636         struct snd_soc_dpcm *dpcm;
1637
1638         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1639                 dpcm->be->dpcm[stream].runtime_update =
1640                                                 SND_SOC_DPCM_UPDATE_NO;
1641 }
1642
1643 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1644         int stream)
1645 {
1646         struct snd_soc_dpcm *dpcm;
1647
1648         /* disable any enabled and non active backends */
1649         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1650
1651                 struct snd_soc_pcm_runtime *be = dpcm->be;
1652                 struct snd_pcm_substream *be_substream =
1653                         snd_soc_dpcm_get_substream(be, stream);
1654
1655                 if (be->dpcm[stream].users == 0)
1656                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1657                                 stream ? "capture" : "playback",
1658                                 be->dpcm[stream].state);
1659
1660                 if (--be->dpcm[stream].users != 0)
1661                         continue;
1662
1663                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1664                         continue;
1665
1666                 soc_pcm_close(be_substream);
1667                 be_substream->runtime = NULL;
1668                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1669         }
1670 }
1671
1672 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1673 {
1674         struct snd_soc_dpcm *dpcm;
1675         int err, count = 0;
1676
1677         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1678         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1679
1680                 struct snd_soc_pcm_runtime *be = dpcm->be;
1681                 struct snd_pcm_substream *be_substream =
1682                         snd_soc_dpcm_get_substream(be, stream);
1683
1684                 if (!be_substream) {
1685                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1686                                 stream ? "capture" : "playback");
1687                         continue;
1688                 }
1689
1690                 /* is this op for this BE ? */
1691                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1692                         continue;
1693
1694                 /* first time the dpcm is open ? */
1695                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1696                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1697                                 stream ? "capture" : "playback",
1698                                 be->dpcm[stream].state);
1699
1700                 if (be->dpcm[stream].users++ != 0)
1701                         continue;
1702
1703                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1704                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1705                         continue;
1706
1707                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1708                         stream ? "capture" : "playback", be->dai_link->name);
1709
1710                 be_substream->runtime = be->dpcm[stream].runtime;
1711                 err = soc_pcm_open(be_substream);
1712                 if (err < 0) {
1713                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1714                         be->dpcm[stream].users--;
1715                         if (be->dpcm[stream].users < 0)
1716                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1717                                         stream ? "capture" : "playback",
1718                                         be->dpcm[stream].state);
1719
1720                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1721                         goto unwind;
1722                 }
1723
1724                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1725                 count++;
1726         }
1727
1728         return count;
1729
1730 unwind:
1731         /* disable any enabled and non active backends */
1732         list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1733                 struct snd_soc_pcm_runtime *be = dpcm->be;
1734                 struct snd_pcm_substream *be_substream =
1735                         snd_soc_dpcm_get_substream(be, stream);
1736
1737                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1738                         continue;
1739
1740                 if (be->dpcm[stream].users == 0)
1741                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1742                                 stream ? "capture" : "playback",
1743                                 be->dpcm[stream].state);
1744
1745                 if (--be->dpcm[stream].users != 0)
1746                         continue;
1747
1748                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1749                         continue;
1750
1751                 soc_pcm_close(be_substream);
1752                 be_substream->runtime = NULL;
1753                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1754         }
1755
1756         return err;
1757 }
1758
1759 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1760                                  struct snd_soc_pcm_stream *stream,
1761                                  u64 formats)
1762 {
1763         runtime->hw.rate_min = stream->rate_min;
1764         runtime->hw.rate_max = stream->rate_max;
1765         runtime->hw.channels_min = stream->channels_min;
1766         runtime->hw.channels_max = stream->channels_max;
1767         if (runtime->hw.formats)
1768                 runtime->hw.formats &= formats & stream->formats;
1769         else
1770                 runtime->hw.formats = formats & stream->formats;
1771         runtime->hw.rates = stream->rates;
1772 }
1773
1774 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1775 {
1776         struct snd_soc_pcm_runtime *fe = substream->private_data;
1777         struct snd_soc_dpcm *dpcm;
1778         u64 formats = ULLONG_MAX;
1779         int stream = substream->stream;
1780
1781         if (!fe->dai_link->dpcm_merged_format)
1782                 return formats;
1783
1784         /*
1785          * It returns merged BE codec format
1786          * if FE want to use it (= dpcm_merged_format)
1787          */
1788
1789         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1790                 struct snd_soc_pcm_runtime *be = dpcm->be;
1791                 struct snd_soc_dai_driver *codec_dai_drv;
1792                 struct snd_soc_pcm_stream *codec_stream;
1793                 int i;
1794
1795                 for (i = 0; i < be->num_codecs; i++) {
1796                         codec_dai_drv = be->codec_dais[i]->driver;
1797                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1798                                 codec_stream = &codec_dai_drv->playback;
1799                         else
1800                                 codec_stream = &codec_dai_drv->capture;
1801
1802                         formats &= codec_stream->formats;
1803                 }
1804         }
1805
1806         return formats;
1807 }
1808
1809 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1810 {
1811         struct snd_pcm_runtime *runtime = substream->runtime;
1812         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1813         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1814         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1815         u64 format = dpcm_runtime_base_format(substream);
1816
1817         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1818                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1819         else
1820                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1821 }
1822
1823 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1824
1825 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1826  * for avoiding the race with trigger callback.
1827  * If the state is unset and a trigger is pending while the previous operation,
1828  * process the pending trigger action here.
1829  */
1830 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1831                                      int stream, enum snd_soc_dpcm_update state)
1832 {
1833         struct snd_pcm_substream *substream =
1834                 snd_soc_dpcm_get_substream(fe, stream);
1835
1836         snd_pcm_stream_lock_irq(substream);
1837         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1838                 dpcm_fe_dai_do_trigger(substream,
1839                                        fe->dpcm[stream].trigger_pending - 1);
1840                 fe->dpcm[stream].trigger_pending = 0;
1841         }
1842         fe->dpcm[stream].runtime_update = state;
1843         snd_pcm_stream_unlock_irq(substream);
1844 }
1845
1846 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1847                                int stream)
1848 {
1849         struct snd_soc_dpcm *dpcm;
1850         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1851         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1852         int err;
1853
1854         /* apply symmetry for FE */
1855         if (soc_pcm_has_symmetry(fe_substream))
1856                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1857
1858         /* Symmetry only applies if we've got an active stream. */
1859         if (fe_cpu_dai->active) {
1860                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1861                 if (err < 0)
1862                         return err;
1863         }
1864
1865         /* apply symmetry for BE */
1866         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1867                 struct snd_soc_pcm_runtime *be = dpcm->be;
1868                 struct snd_pcm_substream *be_substream =
1869                         snd_soc_dpcm_get_substream(be, stream);
1870                 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1871                 int i;
1872
1873                 if (rtd->dai_link->be_hw_params_fixup)
1874                         continue;
1875
1876                 if (soc_pcm_has_symmetry(be_substream))
1877                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1878
1879                 /* Symmetry only applies if we've got an active stream. */
1880                 if (rtd->cpu_dai->active) {
1881                         err = soc_pcm_apply_symmetry(be_substream, rtd->cpu_dai);
1882                         if (err < 0)
1883                                 return err;
1884                 }
1885
1886                 for (i = 0; i < rtd->num_codecs; i++) {
1887                         if (rtd->codec_dais[i]->active) {
1888                                 err = soc_pcm_apply_symmetry(be_substream,
1889                                                              rtd->codec_dais[i]);
1890                                 if (err < 0)
1891                                         return err;
1892                         }
1893                 }
1894         }
1895
1896         return 0;
1897 }
1898
1899 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1900 {
1901         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1902         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1903         int stream = fe_substream->stream, ret = 0;
1904
1905         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1906
1907         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1908         if (ret < 0) {
1909                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1910                 goto be_err;
1911         }
1912
1913         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1914
1915         /* start the DAI frontend */
1916         ret = soc_pcm_open(fe_substream);
1917         if (ret < 0) {
1918                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1919                 goto unwind;
1920         }
1921
1922         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1923
1924         dpcm_set_fe_runtime(fe_substream);
1925         snd_pcm_limit_hw_rates(runtime);
1926
1927         ret = dpcm_apply_symmetry(fe_substream, stream);
1928         if (ret < 0) {
1929                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1930                         ret);
1931                 goto unwind;
1932         }
1933
1934         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1935         return 0;
1936
1937 unwind:
1938         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1939 be_err:
1940         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1941         return ret;
1942 }
1943
1944 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1945 {
1946         struct snd_soc_dpcm *dpcm;
1947
1948         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1949         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1950
1951                 struct snd_soc_pcm_runtime *be = dpcm->be;
1952                 struct snd_pcm_substream *be_substream =
1953                         snd_soc_dpcm_get_substream(be, stream);
1954
1955                 /* is this op for this BE ? */
1956                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1957                         continue;
1958
1959                 if (be->dpcm[stream].users == 0)
1960                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1961                                 stream ? "capture" : "playback",
1962                                 be->dpcm[stream].state);
1963
1964                 if (--be->dpcm[stream].users != 0)
1965                         continue;
1966
1967                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1968                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1969                         continue;
1970
1971                 dev_dbg(be->dev, "ASoC: close BE %s\n",
1972                         be->dai_link->name);
1973
1974                 soc_pcm_close(be_substream);
1975                 be_substream->runtime = NULL;
1976
1977                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1978         }
1979         return 0;
1980 }
1981
1982 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1983 {
1984         struct snd_soc_pcm_runtime *fe = substream->private_data;
1985         int stream = substream->stream;
1986
1987         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1988
1989         /* shutdown the BEs */
1990         dpcm_be_dai_shutdown(fe, substream->stream);
1991
1992         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1993
1994         /* now shutdown the frontend */
1995         soc_pcm_close(substream);
1996
1997         /* run the stream event for each BE */
1998         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1999
2000         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2001         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2002         return 0;
2003 }
2004
2005 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2006 {
2007         struct snd_soc_dpcm *dpcm;
2008
2009         /* only hw_params backends that are either sinks or sources
2010          * to this frontend DAI */
2011         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2012
2013                 struct snd_soc_pcm_runtime *be = dpcm->be;
2014                 struct snd_pcm_substream *be_substream =
2015                         snd_soc_dpcm_get_substream(be, stream);
2016
2017                 /* is this op for this BE ? */
2018                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2019                         continue;
2020
2021                 /* only free hw when no longer used - check all FEs */
2022                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2023                                 continue;
2024
2025                 /* do not free hw if this BE is used by other FE */
2026                 if (be->dpcm[stream].users > 1)
2027                         continue;
2028
2029                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2030                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2031                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2032                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2033                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2034                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2035                         continue;
2036
2037                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2038                         be->dai_link->name);
2039
2040                 soc_pcm_hw_free(be_substream);
2041
2042                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2043         }
2044
2045         return 0;
2046 }
2047
2048 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2049 {
2050         struct snd_soc_pcm_runtime *fe = substream->private_data;
2051         int err, stream = substream->stream;
2052
2053         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2054         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2055
2056         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2057
2058         /* call hw_free on the frontend */
2059         err = soc_pcm_hw_free(substream);
2060         if (err < 0)
2061                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2062                         fe->dai_link->name);
2063
2064         /* only hw_params backends that are either sinks or sources
2065          * to this frontend DAI */
2066         err = dpcm_be_dai_hw_free(fe, stream);
2067
2068         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2069         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2070
2071         mutex_unlock(&fe->card->mutex);
2072         return 0;
2073 }
2074
2075 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2076 {
2077         struct snd_soc_dpcm *dpcm;
2078         int ret;
2079
2080         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2081
2082                 struct snd_soc_pcm_runtime *be = dpcm->be;
2083                 struct snd_pcm_substream *be_substream =
2084                         snd_soc_dpcm_get_substream(be, stream);
2085
2086                 /* is this op for this BE ? */
2087                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2088                         continue;
2089
2090                 /* copy params for each dpcm */
2091                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2092                                 sizeof(struct snd_pcm_hw_params));
2093
2094                 /* perform any hw_params fixups */
2095                 if (be->dai_link->be_hw_params_fixup) {
2096                         ret = be->dai_link->be_hw_params_fixup(be,
2097                                         &dpcm->hw_params);
2098                         if (ret < 0) {
2099                                 dev_err(be->dev,
2100                                         "ASoC: hw_params BE fixup failed %d\n",
2101                                         ret);
2102                                 goto unwind;
2103                         }
2104                 }
2105
2106                 /* only allow hw_params() if no connected FEs are running */
2107                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2108                         continue;
2109
2110                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2111                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2112                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2113                         continue;
2114
2115                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2116                         be->dai_link->name);
2117
2118                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2119                 if (ret < 0) {
2120                         dev_err(dpcm->be->dev,
2121                                 "ASoC: hw_params BE failed %d\n", ret);
2122                         goto unwind;
2123                 }
2124
2125                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2126         }
2127         return 0;
2128
2129 unwind:
2130         /* disable any enabled and non active backends */
2131         list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2132                 struct snd_soc_pcm_runtime *be = dpcm->be;
2133                 struct snd_pcm_substream *be_substream =
2134                         snd_soc_dpcm_get_substream(be, stream);
2135
2136                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2137                         continue;
2138
2139                 /* only allow hw_free() if no connected FEs are running */
2140                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2141                         continue;
2142
2143                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2144                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2145                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2146                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2147                         continue;
2148
2149                 soc_pcm_hw_free(be_substream);
2150         }
2151
2152         return ret;
2153 }
2154
2155 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2156                                  struct snd_pcm_hw_params *params)
2157 {
2158         struct snd_soc_pcm_runtime *fe = substream->private_data;
2159         int ret, stream = substream->stream;
2160
2161         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2162         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2163
2164         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2165                         sizeof(struct snd_pcm_hw_params));
2166         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2167         if (ret < 0) {
2168                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2169                 goto out;
2170         }
2171
2172         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2173                         fe->dai_link->name, params_rate(params),
2174                         params_channels(params), params_format(params));
2175
2176         /* call hw_params on the frontend */
2177         ret = soc_pcm_hw_params(substream, params);
2178         if (ret < 0) {
2179                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2180                 dpcm_be_dai_hw_free(fe, stream);
2181          } else
2182                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2183
2184 out:
2185         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2186         mutex_unlock(&fe->card->mutex);
2187         return ret;
2188 }
2189
2190 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2191                 struct snd_pcm_substream *substream, int cmd)
2192 {
2193         int ret;
2194
2195         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2196                         dpcm->be->dai_link->name, cmd);
2197
2198         ret = soc_pcm_trigger(substream, cmd);
2199         if (ret < 0)
2200                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2201
2202         return ret;
2203 }
2204
2205 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2206                                int cmd)
2207 {
2208         struct snd_soc_dpcm *dpcm;
2209         int ret = 0;
2210
2211         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2212
2213                 struct snd_soc_pcm_runtime *be = dpcm->be;
2214                 struct snd_pcm_substream *be_substream =
2215                         snd_soc_dpcm_get_substream(be, stream);
2216
2217                 /* is this op for this BE ? */
2218                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2219                         continue;
2220
2221                 switch (cmd) {
2222                 case SNDRV_PCM_TRIGGER_START:
2223                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2224                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2225                                 continue;
2226
2227                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2228                         if (ret)
2229                                 return ret;
2230
2231                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2232                         break;
2233                 case SNDRV_PCM_TRIGGER_RESUME:
2234                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2235                                 continue;
2236
2237                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2238                         if (ret)
2239                                 return ret;
2240
2241                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2242                         break;
2243                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2244                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2245                                 continue;
2246
2247                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2248                         if (ret)
2249                                 return ret;
2250
2251                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2252                         break;
2253                 case SNDRV_PCM_TRIGGER_STOP:
2254                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2255                                 continue;
2256
2257                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2258                                 continue;
2259
2260                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2261                         if (ret)
2262                                 return ret;
2263
2264                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2265                         break;
2266                 case SNDRV_PCM_TRIGGER_SUSPEND:
2267                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2268                                 continue;
2269
2270                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2271                                 continue;
2272
2273                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2274                         if (ret)
2275                                 return ret;
2276
2277                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2278                         break;
2279                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2280                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2281                                 continue;
2282
2283                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2284                                 continue;
2285
2286                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2287                         if (ret)
2288                                 return ret;
2289
2290                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2291                         break;
2292                 }
2293         }
2294
2295         return ret;
2296 }
2297 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2298
2299 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2300 {
2301         struct snd_soc_pcm_runtime *fe = substream->private_data;
2302         int stream = substream->stream, ret;
2303         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2304
2305         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2306
2307         switch (trigger) {
2308         case SND_SOC_DPCM_TRIGGER_PRE:
2309                 /* call trigger on the frontend before the backend. */
2310
2311                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2312                                 fe->dai_link->name, cmd);
2313
2314                 ret = soc_pcm_trigger(substream, cmd);
2315                 if (ret < 0) {
2316                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2317                         goto out;
2318                 }
2319
2320                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2321                 break;
2322         case SND_SOC_DPCM_TRIGGER_POST:
2323                 /* call trigger on the frontend after the backend. */
2324
2325                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2326                 if (ret < 0) {
2327                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2328                         goto out;
2329                 }
2330
2331                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2332                                 fe->dai_link->name, cmd);
2333
2334                 ret = soc_pcm_trigger(substream, cmd);
2335                 break;
2336         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2337                 /* bespoke trigger() - handles both FE and BEs */
2338
2339                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2340                                 fe->dai_link->name, cmd);
2341
2342                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2343                 if (ret < 0) {
2344                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2345                         goto out;
2346                 }
2347                 break;
2348         default:
2349                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2350                                 fe->dai_link->name);
2351                 ret = -EINVAL;
2352                 goto out;
2353         }
2354
2355         switch (cmd) {
2356         case SNDRV_PCM_TRIGGER_START:
2357         case SNDRV_PCM_TRIGGER_RESUME:
2358         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2359                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2360                 break;
2361         case SNDRV_PCM_TRIGGER_STOP:
2362         case SNDRV_PCM_TRIGGER_SUSPEND:
2363                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2364                 break;
2365         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2366                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2367                 break;
2368         }
2369
2370 out:
2371         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2372         return ret;
2373 }
2374
2375 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2376 {
2377         struct snd_soc_pcm_runtime *fe = substream->private_data;
2378         int stream = substream->stream;
2379
2380         /* if FE's runtime_update is already set, we're in race;
2381          * process this trigger later at exit
2382          */
2383         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2384                 fe->dpcm[stream].trigger_pending = cmd + 1;
2385                 return 0; /* delayed, assuming it's successful */
2386         }
2387
2388         /* we're alone, let's trigger */
2389         return dpcm_fe_dai_do_trigger(substream, cmd);
2390 }
2391
2392 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2393 {
2394         struct snd_soc_dpcm *dpcm;
2395         int ret = 0;
2396
2397         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2398
2399                 struct snd_soc_pcm_runtime *be = dpcm->be;
2400                 struct snd_pcm_substream *be_substream =
2401                         snd_soc_dpcm_get_substream(be, stream);
2402
2403                 /* is this op for this BE ? */
2404                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2405                         continue;
2406
2407                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2408                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2409                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2410                         continue;
2411
2412                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2413                         be->dai_link->name);
2414
2415                 ret = soc_pcm_prepare(be_substream);
2416                 if (ret < 0) {
2417                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2418                                 ret);
2419                         break;
2420                 }
2421
2422                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2423         }
2424         return ret;
2425 }
2426
2427 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2428 {
2429         struct snd_soc_pcm_runtime *fe = substream->private_data;
2430         int stream = substream->stream, ret = 0;
2431
2432         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2433
2434         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2435
2436         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2437
2438         /* there is no point preparing this FE if there are no BEs */
2439         if (list_empty(&fe->dpcm[stream].be_clients)) {
2440                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2441                                 fe->dai_link->name);
2442                 ret = -EINVAL;
2443                 goto out;
2444         }
2445
2446         ret = dpcm_be_dai_prepare(fe, substream->stream);
2447         if (ret < 0)
2448                 goto out;
2449
2450         /* call prepare on the frontend */
2451         ret = soc_pcm_prepare(substream);
2452         if (ret < 0) {
2453                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2454                         fe->dai_link->name);
2455                 goto out;
2456         }
2457
2458         /* run the stream event for each BE */
2459         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2460         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2461
2462 out:
2463         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2464         mutex_unlock(&fe->card->mutex);
2465
2466         return ret;
2467 }
2468
2469 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2470                      unsigned int cmd, void *arg)
2471 {
2472         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2473         struct snd_soc_platform *platform = rtd->platform;
2474         struct snd_soc_component *component;
2475         struct snd_soc_rtdcom_list *rtdcom;
2476
2477         if (platform && platform->driver->ops && platform->driver->ops->ioctl)
2478                 return platform->driver->ops->ioctl(substream, cmd, arg);
2479
2480         for_each_rtdcom(rtd, rtdcom) {
2481                 component = rtdcom->component;
2482
2483                 /* ignore duplication for now */
2484                 if (platform && (component == &platform->component))
2485                         continue;
2486
2487                 if (!component->driver->ops ||
2488                     !component->driver->ops->ioctl)
2489                         continue;
2490
2491                 /* FIXME: use 1st ioctl */
2492                 return component->driver->ops->ioctl(substream, cmd, arg);
2493         }
2494
2495         return snd_pcm_lib_ioctl(substream, cmd, arg);
2496 }
2497
2498 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2499 {
2500         struct snd_pcm_substream *substream =
2501                 snd_soc_dpcm_get_substream(fe, stream);
2502         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2503         int err;
2504
2505         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2506                         stream ? "capture" : "playback", fe->dai_link->name);
2507
2508         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2509                 /* call bespoke trigger - FE takes care of all BE triggers */
2510                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2511                                 fe->dai_link->name);
2512
2513                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2514                 if (err < 0)
2515                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2516         } else {
2517                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2518                         fe->dai_link->name);
2519
2520                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2521                 if (err < 0)
2522                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2523         }
2524
2525         err = dpcm_be_dai_hw_free(fe, stream);
2526         if (err < 0)
2527                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2528
2529         err = dpcm_be_dai_shutdown(fe, stream);
2530         if (err < 0)
2531                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2532
2533         /* run the stream event for each BE */
2534         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2535
2536         return 0;
2537 }
2538
2539 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2540 {
2541         struct snd_pcm_substream *substream =
2542                 snd_soc_dpcm_get_substream(fe, stream);
2543         struct snd_soc_dpcm *dpcm;
2544         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2545         int ret;
2546
2547         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2548                         stream ? "capture" : "playback", fe->dai_link->name);
2549
2550         /* Only start the BE if the FE is ready */
2551         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2552                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2553                 return -EINVAL;
2554
2555         /* startup must always be called for new BEs */
2556         ret = dpcm_be_dai_startup(fe, stream);
2557         if (ret < 0)
2558                 goto disconnect;
2559
2560         /* keep going if FE state is > open */
2561         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2562                 return 0;
2563
2564         ret = dpcm_be_dai_hw_params(fe, stream);
2565         if (ret < 0)
2566                 goto close;
2567
2568         /* keep going if FE state is > hw_params */
2569         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2570                 return 0;
2571
2572
2573         ret = dpcm_be_dai_prepare(fe, stream);
2574         if (ret < 0)
2575                 goto hw_free;
2576
2577         /* run the stream event for each BE */
2578         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2579
2580         /* keep going if FE state is > prepare */
2581         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2582                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2583                 return 0;
2584
2585         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2586                 /* call trigger on the frontend - FE takes care of all BE triggers */
2587                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2588                                 fe->dai_link->name);
2589
2590                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2591                 if (ret < 0) {
2592                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2593                         goto hw_free;
2594                 }
2595         } else {
2596                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2597                         fe->dai_link->name);
2598
2599                 ret = dpcm_be_dai_trigger(fe, stream,
2600                                         SNDRV_PCM_TRIGGER_START);
2601                 if (ret < 0) {
2602                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2603                         goto hw_free;
2604                 }
2605         }
2606
2607         return 0;
2608
2609 hw_free:
2610         dpcm_be_dai_hw_free(fe, stream);
2611 close:
2612         dpcm_be_dai_shutdown(fe, stream);
2613 disconnect:
2614         /* disconnect any non started BEs */
2615         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2616                 struct snd_soc_pcm_runtime *be = dpcm->be;
2617                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2618                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2619         }
2620
2621         return ret;
2622 }
2623
2624 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2625 {
2626         int ret;
2627
2628         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2629         ret = dpcm_run_update_startup(fe, stream);
2630         if (ret < 0)
2631                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2632         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2633
2634         return ret;
2635 }
2636
2637 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2638 {
2639         int ret;
2640
2641         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2642         ret = dpcm_run_update_shutdown(fe, stream);
2643         if (ret < 0)
2644                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2645         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2646
2647         return ret;
2648 }
2649
2650 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2651  * any DAI links.
2652  */
2653 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2654 {
2655         struct snd_soc_pcm_runtime *fe;
2656         int old, new, paths;
2657
2658         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2659         list_for_each_entry(fe, &card->rtd_list, list) {
2660                 struct snd_soc_dapm_widget_list *list;
2661
2662                 /* make sure link is FE */
2663                 if (!fe->dai_link->dynamic)
2664                         continue;
2665
2666                 /* only check active links */
2667                 if (!fe->cpu_dai->active)
2668                         continue;
2669
2670                 /* DAPM sync will call this to update DSP paths */
2671                 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2672                         fe->dai_link->name);
2673
2674                 /* skip if FE doesn't have playback capability */
2675                 if (!fe->cpu_dai->driver->playback.channels_min
2676                     || !fe->codec_dai->driver->playback.channels_min)
2677                         goto capture;
2678
2679                 /* skip if FE isn't currently playing */
2680                 if (!fe->cpu_dai->playback_active
2681                     || !fe->codec_dai->playback_active)
2682                         goto capture;
2683
2684                 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2685                 if (paths < 0) {
2686                         dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2687                                         fe->dai_link->name,  "playback");
2688                         mutex_unlock(&card->mutex);
2689                         return paths;
2690                 }
2691
2692                 /* update any new playback paths */
2693                 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2694                 if (new) {
2695                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2696                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2697                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2698                 }
2699
2700                 /* update any old playback paths */
2701                 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2702                 if (old) {
2703                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2704                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2705                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2706                 }
2707
2708                 dpcm_path_put(&list);
2709 capture:
2710                 /* skip if FE doesn't have capture capability */
2711                 if (!fe->cpu_dai->driver->capture.channels_min
2712                     || !fe->codec_dai->driver->capture.channels_min)
2713                         continue;
2714
2715                 /* skip if FE isn't currently capturing */
2716                 if (!fe->cpu_dai->capture_active
2717                     || !fe->codec_dai->capture_active)
2718                         continue;
2719
2720                 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2721                 if (paths < 0) {
2722                         dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2723                                         fe->dai_link->name,  "capture");
2724                         mutex_unlock(&card->mutex);
2725                         return paths;
2726                 }
2727
2728                 /* update any new capture paths */
2729                 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2730                 if (new) {
2731                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2732                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2733                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2734                 }
2735
2736                 /* update any old capture paths */
2737                 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2738                 if (old) {
2739                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2740                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2741                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2742                 }
2743
2744                 dpcm_path_put(&list);
2745         }
2746
2747         mutex_unlock(&card->mutex);
2748         return 0;
2749 }
2750 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2751 {
2752         struct snd_soc_dpcm *dpcm;
2753         struct list_head *clients =
2754                 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2755
2756         list_for_each_entry(dpcm, clients, list_be) {
2757
2758                 struct snd_soc_pcm_runtime *be = dpcm->be;
2759                 int i;
2760
2761                 if (be->dai_link->ignore_suspend)
2762                         continue;
2763
2764                 for (i = 0; i < be->num_codecs; i++) {
2765                         struct snd_soc_dai *dai = be->codec_dais[i];
2766                         struct snd_soc_dai_driver *drv = dai->driver;
2767
2768                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2769                                          be->dai_link->name);
2770
2771                         if (drv->ops && drv->ops->digital_mute &&
2772                                                         dai->playback_active)
2773                                 drv->ops->digital_mute(dai, mute);
2774                 }
2775         }
2776
2777         return 0;
2778 }
2779
2780 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2781 {
2782         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2783         struct snd_soc_dpcm *dpcm;
2784         struct snd_soc_dapm_widget_list *list;
2785         int ret;
2786         int stream = fe_substream->stream;
2787
2788         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2789         fe->dpcm[stream].runtime = fe_substream->runtime;
2790
2791         ret = dpcm_path_get(fe, stream, &list);
2792         if (ret < 0) {
2793                 mutex_unlock(&fe->card->mutex);
2794                 return ret;
2795         } else if (ret == 0) {
2796                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2797                         fe->dai_link->name, stream ? "capture" : "playback");
2798         }
2799
2800         /* calculate valid and active FE <-> BE dpcms */
2801         dpcm_process_paths(fe, stream, &list, 1);
2802
2803         ret = dpcm_fe_dai_startup(fe_substream);
2804         if (ret < 0) {
2805                 /* clean up all links */
2806                 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2807                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2808
2809                 dpcm_be_disconnect(fe, stream);
2810                 fe->dpcm[stream].runtime = NULL;
2811         }
2812
2813         dpcm_clear_pending_state(fe, stream);
2814         dpcm_path_put(&list);
2815         mutex_unlock(&fe->card->mutex);
2816         return ret;
2817 }
2818
2819 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2820 {
2821         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2822         struct snd_soc_dpcm *dpcm;
2823         int stream = fe_substream->stream, ret;
2824
2825         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2826         ret = dpcm_fe_dai_shutdown(fe_substream);
2827
2828         /* mark FE's links ready to prune */
2829         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2830                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2831
2832         dpcm_be_disconnect(fe, stream);
2833
2834         fe->dpcm[stream].runtime = NULL;
2835         mutex_unlock(&fe->card->mutex);
2836         return ret;
2837 }
2838
2839 static void soc_pcm_private_free(struct snd_pcm *pcm)
2840 {
2841         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2842         struct snd_soc_rtdcom_list *rtdcom;
2843         struct snd_soc_component *component;
2844
2845         /* need to sync the delayed work before releasing resources */
2846         flush_delayed_work(&rtd->delayed_work);
2847         for_each_rtdcom(rtd, rtdcom) {
2848                 component = rtdcom->component;
2849
2850                 if (component->pcm_free)
2851                         component->pcm_free(component, pcm);
2852         }
2853 }
2854
2855 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2856 {
2857         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2858         struct snd_soc_rtdcom_list *rtdcom;
2859         struct snd_soc_component *component;
2860
2861         for_each_rtdcom(rtd, rtdcom) {
2862                 component = rtdcom->component;
2863
2864                 if (!component->driver->ops ||
2865                     !component->driver->ops->ack)
2866                         continue;
2867
2868                 /* FIXME. it returns 1st ask now */
2869                 return component->driver->ops->ack(substream);
2870         }
2871
2872         return -EINVAL;
2873 }
2874
2875 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2876                                 unsigned long pos, void __user *buf,
2877                                 unsigned long bytes)
2878 {
2879         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2880         struct snd_soc_rtdcom_list *rtdcom;
2881         struct snd_soc_component *component;
2882
2883         for_each_rtdcom(rtd, rtdcom) {
2884                 component = rtdcom->component;
2885
2886                 if (!component->driver->ops ||
2887                     !component->driver->ops->copy_user)
2888                         continue;
2889
2890                 /* FIXME. it returns 1st copy now */
2891                 return component->driver->ops->copy_user(substream, channel,
2892                                                          pos, buf, bytes);
2893         }
2894
2895         return -EINVAL;
2896 }
2897
2898 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
2899                                   unsigned long pos, void *buf, unsigned long bytes)
2900 {
2901         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2902         struct snd_soc_rtdcom_list *rtdcom;
2903         struct snd_soc_component *component;
2904
2905         for_each_rtdcom(rtd, rtdcom) {
2906                 component = rtdcom->component;
2907
2908                 if (!component->driver->ops ||
2909                     !component->driver->ops->copy_kernel)
2910                         continue;
2911
2912                 /* FIXME. it returns 1st copy now */
2913                 return component->driver->ops->copy_kernel(substream, channel,
2914                                                            pos, buf, bytes);
2915         }
2916
2917         return -EINVAL;
2918 }
2919
2920 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
2921                                    unsigned long pos, unsigned long bytes)
2922 {
2923         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2924         struct snd_soc_rtdcom_list *rtdcom;
2925         struct snd_soc_component *component;
2926
2927         for_each_rtdcom(rtd, rtdcom) {
2928                 component = rtdcom->component;
2929
2930                 if (!component->driver->ops ||
2931                     !component->driver->ops->fill_silence)
2932                         continue;
2933
2934                 /* FIXME. it returns 1st silence now */
2935                 return component->driver->ops->fill_silence(substream, channel,
2936                                                             pos, bytes);
2937         }
2938
2939         return -EINVAL;
2940 }
2941
2942 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
2943                                     unsigned long offset)
2944 {
2945         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2946         struct snd_soc_rtdcom_list *rtdcom;
2947         struct snd_soc_component *component;
2948         struct page *page;
2949
2950         for_each_rtdcom(rtd, rtdcom) {
2951                 component = rtdcom->component;
2952
2953                 if (!component->driver->ops ||
2954                     !component->driver->ops->page)
2955                         continue;
2956
2957                 /* FIXME. it returns 1st page now */
2958                 page = component->driver->ops->page(substream, offset);
2959                 if (page)
2960                         return page;
2961         }
2962
2963         return NULL;
2964 }
2965
2966 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
2967                            struct vm_area_struct *vma)
2968 {
2969         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2970         struct snd_soc_rtdcom_list *rtdcom;
2971         struct snd_soc_component *component;
2972
2973         for_each_rtdcom(rtd, rtdcom) {
2974                 component = rtdcom->component;
2975
2976                 if (!component->driver->ops ||
2977                     !component->driver->ops->mmap)
2978                         continue;
2979
2980                 /* FIXME. it returns 1st mmap now */
2981                 return component->driver->ops->mmap(substream, vma);
2982         }
2983
2984         return -EINVAL;
2985 }
2986
2987 /* create a new pcm */
2988 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2989 {
2990         struct snd_soc_platform *platform = rtd->platform;
2991         struct snd_soc_dai *codec_dai;
2992         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2993         struct snd_soc_component *component;
2994         struct snd_soc_rtdcom_list *rtdcom;
2995         struct snd_pcm *pcm;
2996         char new_name[64];
2997         int ret = 0, playback = 0, capture = 0;
2998         int i;
2999
3000         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
3001                 playback = rtd->dai_link->dpcm_playback;
3002                 capture = rtd->dai_link->dpcm_capture;
3003         } else {
3004                 for (i = 0; i < rtd->num_codecs; i++) {
3005                         codec_dai = rtd->codec_dais[i];
3006                         if (codec_dai->driver->playback.channels_min)
3007                                 playback = 1;
3008                         if (codec_dai->driver->capture.channels_min)
3009                                 capture = 1;
3010                 }
3011
3012                 capture = capture && cpu_dai->driver->capture.channels_min;
3013                 playback = playback && cpu_dai->driver->playback.channels_min;
3014         }
3015
3016         if (rtd->dai_link->playback_only) {
3017                 playback = 1;
3018                 capture = 0;
3019         }
3020
3021         if (rtd->dai_link->capture_only) {
3022                 playback = 0;
3023                 capture = 1;
3024         }
3025
3026         /* create the PCM */
3027         if (rtd->dai_link->no_pcm) {
3028                 snprintf(new_name, sizeof(new_name), "(%s)",
3029                         rtd->dai_link->stream_name);
3030
3031                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
3032                                 playback, capture, &pcm);
3033         } else {
3034                 if (rtd->dai_link->dynamic)
3035                         snprintf(new_name, sizeof(new_name), "%s (*)",
3036                                 rtd->dai_link->stream_name);
3037                 else
3038                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
3039                                 rtd->dai_link->stream_name,
3040                                 (rtd->num_codecs > 1) ?
3041                                 "multicodec" : rtd->codec_dai->name, num);
3042
3043                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
3044                         capture, &pcm);
3045         }
3046         if (ret < 0) {
3047                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
3048                         rtd->dai_link->name);
3049                 return ret;
3050         }
3051         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
3052
3053         /* DAPM dai link stream work */
3054         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
3055
3056         pcm->nonatomic = rtd->dai_link->nonatomic;
3057         rtd->pcm = pcm;
3058         pcm->private_data = rtd;
3059
3060         if (rtd->dai_link->no_pcm) {
3061                 if (playback)
3062                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
3063                 if (capture)
3064                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3065                 goto out;
3066         }
3067
3068         /* ASoC PCM operations */
3069         if (rtd->dai_link->dynamic) {
3070                 rtd->ops.open           = dpcm_fe_dai_open;
3071                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
3072                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
3073                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
3074                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
3075                 rtd->ops.close          = dpcm_fe_dai_close;
3076                 rtd->ops.pointer        = soc_pcm_pointer;
3077                 rtd->ops.ioctl          = soc_pcm_ioctl;
3078         } else {
3079                 rtd->ops.open           = soc_pcm_open;
3080                 rtd->ops.hw_params      = soc_pcm_hw_params;
3081                 rtd->ops.prepare        = soc_pcm_prepare;
3082                 rtd->ops.trigger        = soc_pcm_trigger;
3083                 rtd->ops.hw_free        = soc_pcm_hw_free;
3084                 rtd->ops.close          = soc_pcm_close;
3085                 rtd->ops.pointer        = soc_pcm_pointer;
3086                 rtd->ops.ioctl          = soc_pcm_ioctl;
3087         }
3088
3089         for_each_rtdcom(rtd, rtdcom) {
3090                 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
3091
3092                 if (!ops)
3093                         continue;
3094
3095                 if (ops->ack)
3096                         rtd->ops.ack            = soc_rtdcom_ack;
3097                 if (ops->copy_user)
3098                         rtd->ops.copy_user      = soc_rtdcom_copy_user;
3099                 if (ops->copy_kernel)
3100                         rtd->ops.copy_kernel    = soc_rtdcom_copy_kernel;
3101                 if (ops->fill_silence)
3102                         rtd->ops.fill_silence   = soc_rtdcom_fill_silence;
3103                 if (ops->page)
3104                         rtd->ops.page           = soc_rtdcom_page;
3105                 if (ops->mmap)
3106                         rtd->ops.mmap           = soc_rtdcom_mmap;
3107         }
3108
3109         /* overwrite */
3110         if (platform && platform->driver->ops) {
3111                 rtd->ops.ack            = platform->driver->ops->ack;
3112                 rtd->ops.copy_user      = platform->driver->ops->copy_user;
3113                 rtd->ops.copy_kernel    = platform->driver->ops->copy_kernel;
3114                 rtd->ops.fill_silence   = platform->driver->ops->fill_silence;
3115                 rtd->ops.page           = platform->driver->ops->page;
3116                 rtd->ops.mmap           = platform->driver->ops->mmap;
3117         }
3118
3119         if (playback)
3120                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3121
3122         if (capture)
3123                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3124
3125         for_each_rtdcom(rtd, rtdcom) {
3126                 component = rtdcom->component;
3127
3128                 if (!component->pcm_new)
3129                         continue;
3130
3131                 ret = component->pcm_new(component, rtd);
3132                 if (ret < 0) {
3133                         dev_err(component->dev,
3134                                 "ASoC: pcm constructor failed: %d\n",
3135                                 ret);
3136                         return ret;
3137                 }
3138         }
3139
3140         pcm->private_free = soc_pcm_private_free;
3141 out:
3142         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3143                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3144                  cpu_dai->name);
3145         return ret;
3146 }
3147
3148 /* is the current PCM operation for this FE ? */
3149 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3150 {
3151         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3152                 return 1;
3153         return 0;
3154 }
3155 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3156
3157 /* is the current PCM operation for this BE ? */
3158 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3159                 struct snd_soc_pcm_runtime *be, int stream)
3160 {
3161         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3162            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3163                   be->dpcm[stream].runtime_update))
3164                 return 1;
3165         return 0;
3166 }
3167 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3168
3169 /* get the substream for this BE */
3170 struct snd_pcm_substream *
3171         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3172 {
3173         return be->pcm->streams[stream].substream;
3174 }
3175 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3176
3177 /* get the BE runtime state */
3178 enum snd_soc_dpcm_state
3179         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3180 {
3181         return be->dpcm[stream].state;
3182 }
3183 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3184
3185 /* set the BE runtime state */
3186 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3187                 int stream, enum snd_soc_dpcm_state state)
3188 {
3189         be->dpcm[stream].state = state;
3190 }
3191 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3192
3193 /*
3194  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3195  * are not running, paused or suspended for the specified stream direction.
3196  */
3197 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3198                 struct snd_soc_pcm_runtime *be, int stream)
3199 {
3200         struct snd_soc_dpcm *dpcm;
3201         int state;
3202
3203         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
3204
3205                 if (dpcm->fe == fe)
3206                         continue;
3207
3208                 state = dpcm->fe->dpcm[stream].state;
3209                 if (state == SND_SOC_DPCM_STATE_START ||
3210                         state == SND_SOC_DPCM_STATE_PAUSED ||
3211                         state == SND_SOC_DPCM_STATE_SUSPEND)
3212                         return 0;
3213         }
3214
3215         /* it's safe to free/stop this BE DAI */
3216         return 1;
3217 }
3218 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3219
3220 /*
3221  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3222  * running, paused or suspended for the specified stream direction.
3223  */
3224 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3225                 struct snd_soc_pcm_runtime *be, int stream)
3226 {
3227         struct snd_soc_dpcm *dpcm;
3228         int state;
3229
3230         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
3231
3232                 if (dpcm->fe == fe)
3233                         continue;
3234
3235                 state = dpcm->fe->dpcm[stream].state;
3236                 if (state == SND_SOC_DPCM_STATE_START ||
3237                         state == SND_SOC_DPCM_STATE_PAUSED ||
3238                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3239                         state == SND_SOC_DPCM_STATE_PREPARE)
3240                         return 0;
3241         }
3242
3243         /* it's safe to change hw_params */
3244         return 1;
3245 }
3246 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3247
3248 #ifdef CONFIG_DEBUG_FS
3249 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3250 {
3251         switch (state) {
3252         case SND_SOC_DPCM_STATE_NEW:
3253                 return "new";
3254         case SND_SOC_DPCM_STATE_OPEN:
3255                 return "open";
3256         case SND_SOC_DPCM_STATE_HW_PARAMS:
3257                 return "hw_params";
3258         case SND_SOC_DPCM_STATE_PREPARE:
3259                 return "prepare";
3260         case SND_SOC_DPCM_STATE_START:
3261                 return "start";
3262         case SND_SOC_DPCM_STATE_STOP:
3263                 return "stop";
3264         case SND_SOC_DPCM_STATE_SUSPEND:
3265                 return "suspend";
3266         case SND_SOC_DPCM_STATE_PAUSED:
3267                 return "paused";
3268         case SND_SOC_DPCM_STATE_HW_FREE:
3269                 return "hw_free";
3270         case SND_SOC_DPCM_STATE_CLOSE:
3271                 return "close";
3272         }
3273
3274         return "unknown";
3275 }
3276
3277 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3278                                 int stream, char *buf, size_t size)
3279 {
3280         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3281         struct snd_soc_dpcm *dpcm;
3282         ssize_t offset = 0;
3283
3284         /* FE state */
3285         offset += snprintf(buf + offset, size - offset,
3286                         "[%s - %s]\n", fe->dai_link->name,
3287                         stream ? "Capture" : "Playback");
3288
3289         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3290                         dpcm_state_string(fe->dpcm[stream].state));
3291
3292         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3293             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3294                 offset += snprintf(buf + offset, size - offset,
3295                                 "Hardware Params: "
3296                                 "Format = %s, Channels = %d, Rate = %d\n",
3297                                 snd_pcm_format_name(params_format(params)),
3298                                 params_channels(params),
3299                                 params_rate(params));
3300
3301         /* BEs state */
3302         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3303
3304         if (list_empty(&fe->dpcm[stream].be_clients)) {
3305                 offset += snprintf(buf + offset, size - offset,
3306                                 " No active DSP links\n");
3307                 goto out;
3308         }
3309
3310         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
3311                 struct snd_soc_pcm_runtime *be = dpcm->be;
3312                 params = &dpcm->hw_params;
3313
3314                 offset += snprintf(buf + offset, size - offset,
3315                                 "- %s\n", be->dai_link->name);
3316
3317                 offset += snprintf(buf + offset, size - offset,
3318                                 "   State: %s\n",
3319                                 dpcm_state_string(be->dpcm[stream].state));
3320
3321                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3322                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3323                         offset += snprintf(buf + offset, size - offset,
3324                                 "   Hardware Params: "
3325                                 "Format = %s, Channels = %d, Rate = %d\n",
3326                                 snd_pcm_format_name(params_format(params)),
3327                                 params_channels(params),
3328                                 params_rate(params));
3329         }
3330
3331 out:
3332         return offset;
3333 }
3334
3335 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3336                                 size_t count, loff_t *ppos)
3337 {
3338         struct snd_soc_pcm_runtime *fe = file->private_data;
3339         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3340         char *buf;
3341
3342         buf = kmalloc(out_count, GFP_KERNEL);
3343         if (!buf)
3344                 return -ENOMEM;
3345
3346         if (fe->cpu_dai->driver->playback.channels_min)
3347                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3348                                         buf + offset, out_count - offset);
3349
3350         if (fe->cpu_dai->driver->capture.channels_min)
3351                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3352                                         buf + offset, out_count - offset);
3353
3354         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3355
3356         kfree(buf);
3357         return ret;
3358 }
3359
3360 static const struct file_operations dpcm_state_fops = {
3361         .open = simple_open,
3362         .read = dpcm_state_read_file,
3363         .llseek = default_llseek,
3364 };
3365
3366 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3367 {
3368         if (!rtd->dai_link)
3369                 return;
3370
3371         if (!rtd->card->debugfs_card_root)
3372                 return;
3373
3374         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3375                         rtd->card->debugfs_card_root);
3376         if (!rtd->debugfs_dpcm_root) {
3377                 dev_dbg(rtd->dev,
3378                          "ASoC: Failed to create dpcm debugfs directory %s\n",
3379                          rtd->dai_link->name);
3380                 return;
3381         }
3382
3383         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3384                             rtd, &dpcm_state_fops);
3385 }
3386 #endif