sound/soc/soc-pcm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // soc-pcm.c  --  ALSA SoC PCM
   4 //
   5 // Copyright 2005 Wolfson Microelectronics PLC.
   6 // Copyright 2005 Openedhand Ltd.
   7 // Copyright (C) 2010 Slimlogic Ltd.
   8 // Copyright (C) 2010 Texas Instruments Inc.
   9 //
  10 // Authors: Liam Girdwood <lrg@ti.com>
  11 //          Mark Brown <broonie@opensource.wolfsonmicro.com>
  12
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/delay.h>
  16 #include <linux/pinctrl/consumer.h>
  17 #include <linux/slab.h>
  18 #include <linux/workqueue.h>
  19 #include <linux/export.h>
  20 #include <linux/debugfs.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/soc.h>
  25 #include <sound/soc-dpcm.h>
  26 #include <sound/soc-link.h>
  27 #include <sound/initval.h>
  28
  29 #define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret)
  30 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd,
  31                                const char *func, int ret)
  32 {
  33         /* Positive, Zero values are not errors */
  34         if (ret >= 0)
  35                 return ret;
  36
  37         /* Negative values might be errors */
  38         switch (ret) {
  39         case -EPROBE_DEFER:
  40         case -ENOTSUPP:
  41         case -EINVAL:
  42                 break;
  43         default:
  44                 dev_err(rtd->dev,
  45                         "ASoC: error at %s on %s: %d\n",
  46                         func, rtd->dai_link->name, ret);
  47         }
  48
  49         return ret;
  50 }
  51
  52 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd,
  53                                                 int stream)
  54 {
  55         snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream));
  56 }
  57
  58 #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \
  59         snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags)
  60
  61 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd,
  62                                                   int stream)
  63 {
  64         snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream));
  65 }
  66
  67 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \
  68         snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags)
  69
  70 #define DPCM_MAX_BE_USERS       8
  71
  72 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
  73 {
  74         return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu";
  75 }
  76 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd)
  77 {
  78         return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec";
  79 }
  80
  81 #ifdef CONFIG_DEBUG_FS
  82 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
  83 {
  84         switch (state) {
  85         case SND_SOC_DPCM_STATE_NEW:
  86                 return "new";
  87         case SND_SOC_DPCM_STATE_OPEN:
  88                 return "open";
  89         case SND_SOC_DPCM_STATE_HW_PARAMS:
  90                 return "hw_params";
  91         case SND_SOC_DPCM_STATE_PREPARE:
  92                 return "prepare";
  93         case SND_SOC_DPCM_STATE_START:
  94                 return "start";
  95         case SND_SOC_DPCM_STATE_STOP:
  96                 return "stop";
  97         case SND_SOC_DPCM_STATE_SUSPEND:
  98                 return "suspend";
  99         case SND_SOC_DPCM_STATE_PAUSED:
 100                 return "paused";
 101         case SND_SOC_DPCM_STATE_HW_FREE:
 102                 return "hw_free";
 103         case SND_SOC_DPCM_STATE_CLOSE:
 104                 return "close";
 105         }
 106
 107         return "unknown";
 108 }
 109
 110 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
 111                                int stream, char *buf, size_t size)
 112 {
 113         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
 114         struct snd_soc_dpcm *dpcm;
 115         ssize_t offset = 0;
 116
 117         /* FE state */
 118         offset += scnprintf(buf + offset, size - offset,
 119                            "[%s - %s]\n", fe->dai_link->name,
 120                            stream ? "Capture" : "Playback");
 121
 122         offset += scnprintf(buf + offset, size - offset, "State: %s\n",
 123                            dpcm_state_string(fe->dpcm[stream].state));
 124
 125         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
 126             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
 127                 offset += scnprintf(buf + offset, size - offset,
 128                                    "Hardware Params: "
 129                                    "Format = %s, Channels = %d, Rate = %d\n",
 130                                    snd_pcm_format_name(params_format(params)),
 131                                    params_channels(params),
 132                                    params_rate(params));
 133
 134         /* BEs state */
 135         offset += scnprintf(buf + offset, size - offset, "Backends:\n");
 136
 137         if (list_empty(&fe->dpcm[stream].be_clients)) {
 138                 offset += scnprintf(buf + offset, size - offset,
 139                                    " No active DSP links\n");
 140                 goto out;
 141         }
 142
 143         for_each_dpcm_be(fe, stream, dpcm) {
 144                 struct snd_soc_pcm_runtime *be = dpcm->be;
 145                 params = &be->dpcm[stream].hw_params;
 146
 147                 offset += scnprintf(buf + offset, size - offset,
 148                                    "- %s\n", be->dai_link->name);
 149
 150                 offset += scnprintf(buf + offset, size - offset,
 151                                    "   State: %s\n",
 152                                    dpcm_state_string(be->dpcm[stream].state));
 153
 154                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
 155                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
 156                         offset += scnprintf(buf + offset, size - offset,
 157                                            "   Hardware Params: "
 158                                            "Format = %s, Channels = %d, Rate = %d\n",
 159                                            snd_pcm_format_name(params_format(params)),
 160                                            params_channels(params),
 161                                            params_rate(params));
 162         }
 163 out:
 164         return offset;
 165 }
 166
 167 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
 168                                     size_t count, loff_t *ppos)
 169 {
 170         struct snd_soc_pcm_runtime *fe = file->private_data;
 171         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
 172         int stream;
 173         char *buf;
 174
 175         if (fe->dai_link->num_cpus > 1) {
 176                 dev_err(fe->dev,
 177                         "%s doesn't support Multi CPU yet\n", __func__);
 178                 return -EINVAL;
 179         }
 180
 181         buf = kmalloc(out_count, GFP_KERNEL);
 182         if (!buf)
 183                 return -ENOMEM;
 184
 185         snd_soc_dpcm_mutex_lock(fe);
 186         for_each_pcm_streams(stream)
 187                 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream))
 188                         offset += dpcm_show_state(fe, stream,
 189                                                   buf + offset,
 190                                                   out_count - offset);
 191         snd_soc_dpcm_mutex_unlock(fe);
 192
 193         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
 194
 195         kfree(buf);
 196         return ret;
 197 }
 198
 199 static const struct file_operations dpcm_state_fops = {
 200         .open = simple_open,
 201         .read = dpcm_state_read_file,
 202         .llseek = default_llseek,
 203 };
 204
 205 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
 206 {
 207         if (!rtd->dai_link->dynamic)
 208                 return;
 209
 210         if (!rtd->card->debugfs_card_root)
 211                 return;
 212
 213         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
 214                                                     rtd->card->debugfs_card_root);
 215
 216         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
 217                             rtd, &dpcm_state_fops);
 218 }
 219
 220 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
 221 {
 222         char *name;
 223
 224         name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
 225                          stream ? "capture" : "playback");
 226         if (name) {
 227                 dpcm->debugfs_state = debugfs_create_dir(
 228                         name, dpcm->fe->debugfs_dpcm_root);
 229                 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
 230                                    &dpcm->state);
 231                 kfree(name);
 232         }
 233 }
 234
 235 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
 236 {
 237         debugfs_remove_recursive(dpcm->debugfs_state);
 238 }
 239
 240 #else
 241 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
 242                                              int stream)
 243 {
 244 }
 245
 246 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
 247 {
 248 }
 249 #endif
 250
 251 /* Set FE's runtime_update state; the state is protected via PCM stream lock
 252  * for avoiding the race with trigger callback.
 253  * If the state is unset and a trigger is pending while the previous operation,
 254  * process the pending trigger action here.
 255  */
 256 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
 257 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
 258                                      int stream, enum snd_soc_dpcm_update state)
 259 {
 260         struct snd_pcm_substream *substream =
 261                 snd_soc_dpcm_get_substream(fe, stream);
 262
 263         snd_soc_dpcm_stream_lock_irq(fe, stream);
 264         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
 265                 dpcm_fe_dai_do_trigger(substream,
 266                                        fe->dpcm[stream].trigger_pending - 1);
 267                 fe->dpcm[stream].trigger_pending = 0;
 268         }
 269         fe->dpcm[stream].runtime_update = state;
 270         snd_soc_dpcm_stream_unlock_irq(fe, stream);
 271 }
 272
 273 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
 274                                      int stream, enum snd_soc_dpcm_update state)
 275 {
 276         be->dpcm[stream].runtime_update = state;
 277 }
 278
 279 /**
 280  * snd_soc_runtime_action() - Increment/Decrement active count for
 281  * PCM runtime components
 282  * @rtd: ASoC PCM runtime that is activated
 283  * @stream: Direction of the PCM stream
 284  * @action: Activate stream if 1. Deactivate if -1.
 285  *
 286  * Increments/Decrements the active count for all the DAIs and components
 287  * attached to a PCM runtime.
 288  * Should typically be called when a stream is opened.
 289  *
 290  * Must be called with the rtd->card->pcm_mutex being held
 291  */
 292 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
 293                             int stream, int action)
 294 {
 295         struct snd_soc_dai *dai;
 296         int i;
 297
 298         snd_soc_dpcm_mutex_assert_held(rtd);
 299
 300         for_each_rtd_dais(rtd, i, dai)
 301                 snd_soc_dai_action(dai, stream, action);
 302 }
 303 EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
 304
 305 /**
 306  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
 307  * @rtd: The ASoC PCM runtime that should be checked.
 308  *
 309  * This function checks whether the power down delay should be ignored for a
 310  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
 311  * been configured to ignore the delay, or if none of the components benefits
 312  * from having the delay.
 313  */
 314 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
 315 {
 316         struct snd_soc_component *component;
 317         bool ignore = true;
 318         int i;
 319
 320         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
 321                 return true;
 322
 323         for_each_rtd_components(rtd, i, component)
 324                 ignore &= !component->driver->use_pmdown_time;
 325
 326         return ignore;
 327 }
 328
 329 /**
 330  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 331  * @substream: the pcm substream
 332  * @hw: the hardware parameters
 333  *
 334  * Sets the substream runtime hardware parameters.
 335  */
 336 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 337         const struct snd_pcm_hardware *hw)
 338 {
 339         substream->runtime->hw = *hw;
 340
 341         return 0;
 342 }
 343 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 344
 345 /* DPCM stream event, send event to FE and all active BEs. */
 346 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
 347         int event)
 348 {
 349         struct snd_soc_dpcm *dpcm;
 350
 351         snd_soc_dpcm_mutex_assert_held(fe);
 352
 353         for_each_dpcm_be(fe, dir, dpcm) {
 354
 355                 struct snd_soc_pcm_runtime *be = dpcm->be;
 356
 357                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
 358                                 be->dai_link->name, event, dir);
 359
 360                 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
 361                     (be->dpcm[dir].users >= 1))
 362                         continue;
 363
 364                 snd_soc_dapm_stream_event(be, dir, event);
 365         }
 366
 367         snd_soc_dapm_stream_event(fe, dir, event);
 368
 369         return 0;
 370 }
 371
 372 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
 373                                    struct snd_pcm_hw_params *params)
 374 {
 375         if (params) {
 376                 dai->rate        = params_rate(params);
 377                 dai->channels    = params_channels(params);
 378                 dai->sample_bits = snd_pcm_format_physical_width(params_format(params));
 379         } else {
 380                 dai->rate        = 0;
 381                 dai->channels    = 0;
 382                 dai->sample_bits = 0;
 383         }
 384 }
 385
 386 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
 387                                         struct snd_soc_dai *soc_dai)
 388 {
 389         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 390         int ret;
 391
 392         if (!snd_soc_dai_active(soc_dai))
 393                 return 0;
 394
 395 #define __soc_pcm_apply_symmetry(name, NAME)                            \
 396         if (soc_dai->name && (soc_dai->driver->symmetric_##name ||      \
 397                               rtd->dai_link->symmetric_##name)) {       \
 398                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
 399                         #name, soc_dai->name);                          \
 400                                                                         \
 401                 ret = snd_pcm_hw_constraint_single(substream->runtime,  \
 402                                                    SNDRV_PCM_HW_PARAM_##NAME,\
 403                                                    soc_dai->name);      \
 404                 if (ret < 0) {                                          \
 405                         dev_err(soc_dai->dev,                           \
 406                                 "ASoC: Unable to apply %s constraint: %d\n",\
 407                                 #name, ret);                            \
 408                         return ret;                                     \
 409                 }                                                       \
 410         }
 411
 412         __soc_pcm_apply_symmetry(rate,          RATE);
 413         __soc_pcm_apply_symmetry(channels,      CHANNELS);
 414         __soc_pcm_apply_symmetry(sample_bits,   SAMPLE_BITS);
 415
 416         return 0;
 417 }
 418
 419 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 420                                 struct snd_pcm_hw_params *params)
 421 {
 422         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 423         struct snd_soc_dai d;
 424         struct snd_soc_dai *dai;
 425         struct snd_soc_dai *cpu_dai;
 426         unsigned int symmetry, i;
 427
 428         d.name = __func__;
 429         soc_pcm_set_dai_params(&d, params);
 430
 431 #define __soc_pcm_params_symmetry(xxx)                                  \
 432         symmetry = rtd->dai_link->symmetric_##xxx;                      \
 433         for_each_rtd_dais(rtd, i, dai)                                  \
 434                 symmetry |= dai->driver->symmetric_##xxx;               \
 435                                                                         \
 436         if (symmetry)                                                   \
 437                 for_each_rtd_cpu_dais(rtd, i, cpu_dai)                  \
 438                         if (!snd_soc_dai_is_dummy(cpu_dai) &&           \
 439                             cpu_dai->xxx && cpu_dai->xxx != d.xxx) {    \
 440                                 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \
 441                                         #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \
 442                                 return -EINVAL;                         \
 443                         }
 444
 445         /* reject unmatched parameters when applying symmetry */
 446         __soc_pcm_params_symmetry(rate);
 447         __soc_pcm_params_symmetry(channels);
 448         __soc_pcm_params_symmetry(sample_bits);
 449
 450         return 0;
 451 }
 452
 453 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream)
 454 {
 455         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 456         struct snd_soc_dai_link *link = rtd->dai_link;
 457         struct snd_soc_dai *dai;
 458         unsigned int symmetry, i;
 459
 460         symmetry = link->symmetric_rate ||
 461                 link->symmetric_channels ||
 462                 link->symmetric_sample_bits;
 463
 464         for_each_rtd_dais(rtd, i, dai)
 465                 symmetry = symmetry ||
 466                         dai->driver->symmetric_rate ||
 467                         dai->driver->symmetric_channels ||
 468                         dai->driver->symmetric_sample_bits;
 469
 470         if (symmetry)
 471                 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 472 }
 473
 474 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
 475 {
 476         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 477         int ret;
 478
 479         if (!bits)
 480                 return;
 481
 482         ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
 483         if (ret != 0)
 484                 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
 485                                  bits, ret);
 486 }
 487
 488 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 489 {
 490         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 491         struct snd_soc_dai *cpu_dai;
 492         struct snd_soc_dai *codec_dai;
 493         int stream = substream->stream;
 494         int i;
 495         unsigned int bits = 0, cpu_bits = 0;
 496
 497         for_each_rtd_codec_dais(rtd, i, codec_dai) {
 498                 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
 499
 500                 if (pcm_codec->sig_bits == 0) {
 501                         bits = 0;
 502                         break;
 503                 }
 504                 bits = max(pcm_codec->sig_bits, bits);
 505         }
 506
 507         for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
 508                 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
 509
 510                 if (pcm_cpu->sig_bits == 0) {
 511                         cpu_bits = 0;
 512                         break;
 513                 }
 514                 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
 515         }
 516
 517         soc_pcm_set_msb(substream, bits);
 518         soc_pcm_set_msb(substream, cpu_bits);
 519 }
 520
 521 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw)
 522 {
 523         hw->rates               = UINT_MAX;
 524         hw->rate_min            = 0;
 525         hw->rate_max            = UINT_MAX;
 526         hw->channels_min        = 0;
 527         hw->channels_max        = UINT_MAX;
 528         hw->formats             = ULLONG_MAX;
 529 }
 530
 531 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw,
 532                                    struct snd_soc_pcm_stream *p)
 533 {
 534         hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates);
 535
 536         /* setup hw->rate_min/max via hw->rates first */
 537         snd_pcm_hw_limit_rates(hw);
 538
 539         /* update hw->rate_min/max by snd_soc_pcm_stream */
 540         hw->rate_min = max(hw->rate_min, p->rate_min);
 541         hw->rate_max = min_not_zero(hw->rate_max, p->rate_max);
 542 }
 543
 544 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw,
 545                                    struct snd_soc_pcm_stream *p)
 546 {
 547         hw->channels_min = max(hw->channels_min, p->channels_min);
 548         hw->channels_max = min(hw->channels_max, p->channels_max);
 549 }
 550
 551 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw,
 552                                      struct snd_soc_pcm_stream *p)
 553 {
 554         hw->formats &= p->formats;
 555 }
 556
 557 /**
 558  * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
 559  * @rtd: ASoC PCM runtime
 560  * @hw: PCM hardware parameters (output)
 561  * @stream: Direction of the PCM stream
 562  *
 563  * Calculates the subset of stream parameters supported by all DAIs
 564  * associated with the PCM stream.
 565  */
 566 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
 567                             struct snd_pcm_hardware *hw, int stream)
 568 {
 569         struct snd_soc_dai *codec_dai;
 570         struct snd_soc_dai *cpu_dai;
 571         struct snd_soc_pcm_stream *codec_stream;
 572         struct snd_soc_pcm_stream *cpu_stream;
 573         unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
 574         int i;
 575
 576         soc_pcm_hw_init(hw);
 577
 578         /* first calculate min/max only for CPUs in the DAI link */
 579         for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
 580
 581                 /*
 582                  * Skip CPUs which don't support the current stream type.
 583                  * Otherwise, since the rate, channel, and format values will
 584                  * zero in that case, we would have no usable settings left,
 585                  * causing the resulting setup to fail.
 586                  */
 587                 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
 588                         continue;
 589
 590                 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
 591
 592                 soc_pcm_hw_update_chan(hw, cpu_stream);
 593                 soc_pcm_hw_update_rate(hw, cpu_stream);
 594                 soc_pcm_hw_update_format(hw, cpu_stream);
 595         }
 596         cpu_chan_min = hw->channels_min;
 597         cpu_chan_max = hw->channels_max;
 598
 599         /* second calculate min/max only for CODECs in the DAI link */
 600         for_each_rtd_codec_dais(rtd, i, codec_dai) {
 601
 602                 /*
 603                  * Skip CODECs which don't support the current stream type.
 604                  * Otherwise, since the rate, channel, and format values will
 605                  * zero in that case, we would have no usable settings left,
 606                  * causing the resulting setup to fail.
 607                  */
 608                 if (!snd_soc_dai_stream_valid(codec_dai, stream))
 609                         continue;
 610
 611                 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
 612
 613                 soc_pcm_hw_update_chan(hw, codec_stream);
 614                 soc_pcm_hw_update_rate(hw, codec_stream);
 615                 soc_pcm_hw_update_format(hw, codec_stream);
 616         }
 617
 618         /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
 619         if (!hw->channels_min)
 620                 return -EINVAL;
 621
 622         /*
 623          * chan min/max cannot be enforced if there are multiple CODEC DAIs
 624          * connected to CPU DAI(s), use CPU DAI's directly and let
 625          * channel allocation be fixed up later
 626          */
 627         if (rtd->dai_link->num_codecs > 1) {
 628                 hw->channels_min = cpu_chan_min;
 629                 hw->channels_max = cpu_chan_max;
 630         }
 631
 632         return 0;
 633 }
 634 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
 635
 636 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 637 {
 638         struct snd_pcm_hardware *hw = &substream->runtime->hw;
 639         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 640         u64 formats = hw->formats;
 641
 642         /*
 643          * At least one CPU and one CODEC should match. Otherwise, we should
 644          * have bailed out on a higher level, since there would be no CPU or
 645          * CODEC to support the transfer direction in that case.
 646          */
 647         snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
 648
 649         if (formats)
 650                 hw->formats &= formats;
 651 }
 652
 653 static int soc_pcm_components_open(struct snd_pcm_substream *substream)
 654 {
 655         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 656         struct snd_soc_component *component;
 657         int i, ret = 0;
 658
 659         for_each_rtd_components(rtd, i, component) {
 660                 ret = snd_soc_component_module_get_when_open(component, substream);
 661                 if (ret < 0)
 662                         break;
 663
 664                 ret = snd_soc_component_open(component, substream);
 665                 if (ret < 0)
 666                         break;
 667         }
 668
 669         return ret;
 670 }
 671
 672 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 673                                     int rollback)
 674 {
 675         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 676         struct snd_soc_component *component;
 677         int i, ret = 0;
 678
 679         for_each_rtd_components(rtd, i, component) {
 680                 int r = snd_soc_component_close(component, substream, rollback);
 681                 if (r < 0)
 682                         ret = r; /* use last ret */
 683
 684                 snd_soc_component_module_put_when_close(component, substream, rollback);
 685         }
 686
 687         return ret;
 688 }
 689
 690 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd,
 691                          struct snd_pcm_substream *substream, int rollback)
 692 {
 693         struct snd_soc_component *component;
 694         struct snd_soc_dai *dai;
 695         int i;
 696
 697         snd_soc_dpcm_mutex_assert_held(rtd);
 698
 699         if (!rollback) {
 700                 snd_soc_runtime_deactivate(rtd, substream->stream);
 701
 702                 /* Make sure DAI parameters cleared if the DAI becomes inactive */
 703                 for_each_rtd_dais(rtd, i, dai)
 704                         if (snd_soc_dai_active(dai) == 0 &&
 705                             (dai->rate || dai->channels || dai->sample_bits))
 706                                 soc_pcm_set_dai_params(dai, NULL);
 707         }
 708
 709         for_each_rtd_dais(rtd, i, dai)
 710                 snd_soc_dai_shutdown(dai, substream, rollback);
 711
 712         snd_soc_link_shutdown(substream, rollback);
 713
 714         soc_pcm_components_close(substream, rollback);
 715
 716         snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
 717
 718         for_each_rtd_components(rtd, i, component)
 719                 if (!snd_soc_component_active(component))
 720                         pinctrl_pm_select_sleep_state(component->dev);
 721
 722         return 0;
 723 }
 724
 725 /*
 726  * Called by ALSA when a PCM substream is closed. Private data can be
 727  * freed here. The cpu DAI, codec DAI, machine and components are also
 728  * shutdown.
 729  */
 730 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
 731                            struct snd_pcm_substream *substream)
 732 {
 733         return soc_pcm_clean(rtd, substream, 0);
 734 }
 735
 736 /* PCM close ops for non-DPCM streams */
 737 static int soc_pcm_close(struct snd_pcm_substream *substream)
 738 {
 739         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 740
 741         snd_soc_dpcm_mutex_lock(rtd);
 742         __soc_pcm_close(rtd, substream);
 743         snd_soc_dpcm_mutex_unlock(rtd);
 744         return 0;
 745 }
 746
 747 static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
 748 {
 749         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 750         struct snd_pcm_hardware *hw = &substream->runtime->hw;
 751         const char *name_cpu = soc_cpu_dai_name(rtd);
 752         const char *name_codec = soc_codec_dai_name(rtd);
 753         const char *err_msg;
 754         struct device *dev = rtd->dev;
 755
 756         err_msg = "rates";
 757         if (!hw->rates)
 758                 goto config_err;
 759
 760         err_msg = "formats";
 761         if (!hw->formats)
 762                 goto config_err;
 763
 764         err_msg = "channels";
 765         if (!hw->channels_min || !hw->channels_max ||
 766              hw->channels_min  >  hw->channels_max)
 767                 goto config_err;
 768
 769         dev_dbg(dev, "ASoC: %s <-> %s info:\n",         name_codec,
 770                                                         name_cpu);
 771         dev_dbg(dev, "ASoC: rate mask 0x%x\n",          hw->rates);
 772         dev_dbg(dev, "ASoC: ch   min %d max %d\n",      hw->channels_min,
 773                                                         hw->channels_max);
 774         dev_dbg(dev, "ASoC: rate min %d max %d\n",      hw->rate_min,
 775                                                         hw->rate_max);
 776
 777         return 0;
 778
 779 config_err:
 780         dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
 781                 name_codec, name_cpu, err_msg);
 782         return -EINVAL;
 783 }
 784
 785 /*
 786  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 787  * then initialized and any private data can be allocated. This also calls
 788  * startup for the cpu DAI, component, machine and codec DAI.
 789  */
 790 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
 791                           struct snd_pcm_substream *substream)
 792 {
 793         struct snd_soc_component *component;
 794         struct snd_soc_dai *dai;
 795         int i, ret = 0;
 796
 797         snd_soc_dpcm_mutex_assert_held(rtd);
 798
 799         for_each_rtd_components(rtd, i, component)
 800                 pinctrl_pm_select_default_state(component->dev);
 801
 802         ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
 803         if (ret < 0)
 804                 goto err;
 805
 806         ret = soc_pcm_components_open(substream);
 807         if (ret < 0)
 808                 goto err;
 809
 810         ret = snd_soc_link_startup(substream);
 811         if (ret < 0)
 812                 goto err;
 813
 814         /* startup the audio subsystem */
 815         for_each_rtd_dais(rtd, i, dai) {
 816                 ret = snd_soc_dai_startup(dai, substream);
 817                 if (ret < 0)
 818                         goto err;
 819         }
 820
 821         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 822         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 823                 goto dynamic;
 824
 825         /* Check that the codec and cpu DAIs are compatible */
 826         soc_pcm_init_runtime_hw(substream);
 827
 828         soc_pcm_update_symmetry(substream);
 829
 830         ret = soc_hw_sanity_check(substream);
 831         if (ret < 0)
 832                 goto err;
 833
 834         soc_pcm_apply_msb(substream);
 835
 836         /* Symmetry only applies if we've already got an active stream. */
 837         for_each_rtd_dais(rtd, i, dai) {
 838                 ret = soc_pcm_apply_symmetry(substream, dai);
 839                 if (ret != 0)
 840                         goto err;
 841         }
 842 dynamic:
 843         snd_soc_runtime_activate(rtd, substream->stream);
 844         ret = 0;
 845 err:
 846         if (ret < 0)
 847                 soc_pcm_clean(rtd, substream, 1);
 848
 849         return soc_pcm_ret(rtd, ret);
 850 }
 851
 852 /* PCM open ops for non-DPCM streams */
 853 static int soc_pcm_open(struct snd_pcm_substream *substream)
 854 {
 855         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 856         int ret;
 857
 858         snd_soc_dpcm_mutex_lock(rtd);
 859         ret = __soc_pcm_open(rtd, substream);
 860         snd_soc_dpcm_mutex_unlock(rtd);
 861         return ret;
 862 }
 863
 864 /*
 865  * Called by ALSA when the PCM substream is prepared, can set format, sample
 866  * rate, etc.  This function is non atomic and can be called multiple times,
 867  * it can refer to the runtime info.
 868  */
 869 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
 870                              struct snd_pcm_substream *substream)
 871 {
 872         struct snd_soc_dai *dai;
 873         int i, ret = 0;
 874
 875         snd_soc_dpcm_mutex_assert_held(rtd);
 876
 877         ret = snd_soc_link_prepare(substream);
 878         if (ret < 0)
 879                 goto out;
 880
 881         ret = snd_soc_pcm_component_prepare(substream);
 882         if (ret < 0)
 883                 goto out;
 884
 885         ret = snd_soc_pcm_dai_prepare(substream);
 886         if (ret < 0)
 887                 goto out;
 888
 889         /* cancel any delayed stream shutdown that is pending */
 890         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 891             rtd->pop_wait) {
 892                 rtd->pop_wait = 0;
 893                 cancel_delayed_work(&rtd->delayed_work);
 894         }
 895
 896         snd_soc_dapm_stream_event(rtd, substream->stream,
 897                         SND_SOC_DAPM_STREAM_START);
 898
 899         for_each_rtd_dais(rtd, i, dai)
 900                 snd_soc_dai_digital_mute(dai, 0, substream->stream);
 901
 902 out:
 903         return soc_pcm_ret(rtd, ret);
 904 }
 905
 906 /* PCM prepare ops for non-DPCM streams */
 907 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 908 {
 909         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 910         int ret;
 911
 912         snd_soc_dpcm_mutex_lock(rtd);
 913         ret = __soc_pcm_prepare(rtd, substream);
 914         snd_soc_dpcm_mutex_unlock(rtd);
 915         return ret;
 916 }
 917
 918 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 919                                        unsigned int mask)
 920 {
 921         struct snd_interval *interval;
 922         int channels = hweight_long(mask);
 923
 924         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 925         interval->min = channels;
 926         interval->max = channels;
 927 }
 928
 929 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
 930                             struct snd_pcm_substream *substream, int rollback)
 931 {
 932         struct snd_soc_dai *dai;
 933         int i;
 934
 935         snd_soc_dpcm_mutex_assert_held(rtd);
 936
 937         /* clear the corresponding DAIs parameters when going to be inactive */
 938         for_each_rtd_dais(rtd, i, dai) {
 939                 if (snd_soc_dai_active(dai) == 1)
 940                         soc_pcm_set_dai_params(dai, NULL);
 941
 942                 if (snd_soc_dai_stream_active(dai, substream->stream) == 1)
 943                         snd_soc_dai_digital_mute(dai, 1, substream->stream);
 944         }
 945
 946         /* run the stream event */
 947         snd_soc_dapm_stream_stop(rtd, substream->stream);
 948
 949         /* free any machine hw params */
 950         snd_soc_link_hw_free(substream, rollback);
 951
 952         /* free any component resources */
 953         snd_soc_pcm_component_hw_free(substream, rollback);
 954
 955         /* now free hw params for the DAIs  */
 956         for_each_rtd_dais(rtd, i, dai)
 957                 if (snd_soc_dai_stream_valid(dai, substream->stream))
 958                         snd_soc_dai_hw_free(dai, substream, rollback);
 959
 960         return 0;
 961 }
 962
 963 /*
 964  * Frees resources allocated by hw_params, can be called multiple times
 965  */
 966 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
 967                              struct snd_pcm_substream *substream)
 968 {
 969         return soc_pcm_hw_clean(rtd, substream, 0);
 970 }
 971
 972 /* hw_free PCM ops for non-DPCM streams */
 973 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 974 {
 975         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 976         int ret;
 977
 978         snd_soc_dpcm_mutex_lock(rtd);
 979         ret = __soc_pcm_hw_free(rtd, substream);
 980         snd_soc_dpcm_mutex_unlock(rtd);
 981         return ret;
 982 }
 983
 984 /*
 985  * Called by ALSA when the hardware params are set by application. This
 986  * function can also be called multiple times and can allocate buffers
 987  * (using snd_pcm_lib_* ). It's non-atomic.
 988  */
 989 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
 990                                struct snd_pcm_substream *substream,
 991                                struct snd_pcm_hw_params *params)
 992 {
 993         struct snd_soc_dai *cpu_dai;
 994         struct snd_soc_dai *codec_dai;
 995         struct snd_pcm_hw_params tmp_params;
 996         int i, ret = 0;
 997
 998         snd_soc_dpcm_mutex_assert_held(rtd);
 999
1000         ret = soc_pcm_params_symmetry(substream, params);
1001         if (ret)
1002                 goto out;
1003
1004         ret = snd_soc_link_hw_params(substream, params);
1005         if (ret < 0)
1006                 goto out;
1007
1008         for_each_rtd_codec_dais(rtd, i, codec_dai) {
1009                 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream);
1010
1011                 /*
1012                  * Skip CODECs which don't support the current stream type,
1013                  * the idea being that if a CODEC is not used for the currently
1014                  * set up transfer direction, it should not need to be
1015                  * configured, especially since the configuration used might
1016                  * not even be supported by that CODEC. There may be cases
1017                  * however where a CODEC needs to be set up although it is
1018                  * actually not being used for the transfer, e.g. if a
1019                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
1020                  * for the DAI link including a playback-only CODEC.
1021                  * If this becomes necessary, we will have to augment the
1022                  * machine driver setup with information on how to act, so
1023                  * we can do the right thing here.
1024                  */
1025                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1026                         continue;
1027
1028                 /* copy params for each codec */
1029                 tmp_params = *params;
1030
1031                 /* fixup params based on TDM slot masks */
1032                 if (tdm_mask)
1033                         soc_pcm_codec_params_fixup(&tmp_params, tdm_mask);
1034
1035                 ret = snd_soc_dai_hw_params(codec_dai, substream,
1036                                             &tmp_params);
1037                 if(ret < 0)
1038                         goto out;
1039
1040                 soc_pcm_set_dai_params(codec_dai, &tmp_params);
1041                 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai);
1042         }
1043
1044         for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1045                 unsigned int ch_mask = 0;
1046                 int j;
1047
1048                 /*
1049                  * Skip CPUs which don't support the current stream
1050                  * type. See soc_pcm_init_runtime_hw() for more details
1051                  */
1052                 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1053                         continue;
1054
1055                 /* copy params for each cpu */
1056                 tmp_params = *params;
1057
1058                 if (!rtd->dai_link->codec_ch_maps)
1059                         goto hw_params;
1060                 /*
1061                  * construct cpu channel mask by combining ch_mask of each
1062                  * codec which maps to the cpu.
1063                  */
1064                 for_each_rtd_codec_dais(rtd, j, codec_dai) {
1065                         if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i)
1066                                 ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask;
1067                 }
1068
1069                 /* fixup cpu channel number */
1070                 if (ch_mask)
1071                         soc_pcm_codec_params_fixup(&tmp_params, ch_mask);
1072
1073 hw_params:
1074                 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params);
1075                 if (ret < 0)
1076                         goto out;
1077
1078                 /* store the parameters for each DAI */
1079                 soc_pcm_set_dai_params(cpu_dai, &tmp_params);
1080                 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai);
1081         }
1082
1083         ret = snd_soc_pcm_component_hw_params(substream, params);
1084 out:
1085         if (ret < 0)
1086                 soc_pcm_hw_clean(rtd, substream, 1);
1087
1088         return soc_pcm_ret(rtd, ret);
1089 }
1090
1091 /* hw_params PCM ops for non-DPCM streams */
1092 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1093                              struct snd_pcm_hw_params *params)
1094 {
1095         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1096         int ret;
1097
1098         snd_soc_dpcm_mutex_lock(rtd);
1099         ret = __soc_pcm_hw_params(rtd, substream, params);
1100         snd_soc_dpcm_mutex_unlock(rtd);
1101         return ret;
1102 }
1103
1104 #define TRIGGER_MAX 3
1105 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = {
1106         [SND_SOC_TRIGGER_ORDER_DEFAULT] = {
1107                 snd_soc_link_trigger,
1108                 snd_soc_pcm_component_trigger,
1109                 snd_soc_pcm_dai_trigger,
1110         },
1111         [SND_SOC_TRIGGER_ORDER_LDC] = {
1112                 snd_soc_link_trigger,
1113                 snd_soc_pcm_dai_trigger,
1114                 snd_soc_pcm_component_trigger,
1115         },
1116 };
1117
1118 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1119 {
1120         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1121         struct snd_soc_component *component;
1122         int ret = 0, r = 0, i;
1123         int rollback = 0;
1124         int start = 0, stop = 0;
1125
1126         /*
1127          * select START/STOP sequence
1128          */
1129         for_each_rtd_components(rtd, i, component) {
1130                 if (component->driver->trigger_start)
1131                         start = component->driver->trigger_start;
1132                 if (component->driver->trigger_stop)
1133                         stop = component->driver->trigger_stop;
1134         }
1135         if (rtd->dai_link->trigger_start)
1136                 start = rtd->dai_link->trigger_start;
1137         if (rtd->dai_link->trigger_stop)
1138                 stop  = rtd->dai_link->trigger_stop;
1139
1140         if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX ||
1141             stop  < 0 || stop  >= SND_SOC_TRIGGER_ORDER_MAX)
1142                 return -EINVAL;
1143
1144         /*
1145          * START
1146          */
1147         switch (cmd) {
1148         case SNDRV_PCM_TRIGGER_START:
1149         case SNDRV_PCM_TRIGGER_RESUME:
1150         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1151                 for (i = 0; i < TRIGGER_MAX; i++) {
1152                         r = trigger[start][i](substream, cmd, 0);
1153                         if (r < 0)
1154                                 break;
1155                 }
1156         }
1157
1158         /*
1159          * Rollback if START failed
1160          * find correspond STOP command
1161          */
1162         if (r < 0) {
1163                 rollback = 1;
1164                 ret = r;
1165                 switch (cmd) {
1166                 case SNDRV_PCM_TRIGGER_START:
1167                         cmd = SNDRV_PCM_TRIGGER_STOP;
1168                         break;
1169                 case SNDRV_PCM_TRIGGER_RESUME:
1170                         cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1171                         break;
1172                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1173                         cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1174                         break;
1175                 }
1176         }
1177
1178         /*
1179          * STOP
1180          */
1181         switch (cmd) {
1182         case SNDRV_PCM_TRIGGER_STOP:
1183         case SNDRV_PCM_TRIGGER_SUSPEND:
1184         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1185                 for (i = TRIGGER_MAX; i > 0; i--) {
1186                         r = trigger[stop][i - 1](substream, cmd, rollback);
1187                         if (r < 0)
1188                                 ret = r;
1189                 }
1190         }
1191
1192         return ret;
1193 }
1194
1195 /*
1196  * soc level wrapper for pointer callback
1197  * If cpu_dai, codec_dai, component driver has the delay callback, then
1198  * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
1199  */
1200 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1201 {
1202         struct snd_pcm_runtime *runtime = substream->runtime;
1203         snd_pcm_uframes_t offset = 0;
1204         snd_pcm_sframes_t codec_delay = 0;
1205         snd_pcm_sframes_t cpu_delay = 0;
1206
1207         offset = snd_soc_pcm_component_pointer(substream);
1208
1209         /* should be called *after* snd_soc_pcm_component_pointer() */
1210         snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
1211         snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
1212
1213         runtime->delay = cpu_delay + codec_delay;
1214
1215         return offset;
1216 }
1217
1218 /* connect a FE and BE */
1219 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1220                 struct snd_soc_pcm_runtime *be, int stream)
1221 {
1222         struct snd_pcm_substream *fe_substream;
1223         struct snd_pcm_substream *be_substream;
1224         struct snd_soc_dpcm *dpcm;
1225
1226         snd_soc_dpcm_mutex_assert_held(fe);
1227
1228         /* only add new dpcms */
1229         for_each_dpcm_be(fe, stream, dpcm) {
1230                 if (dpcm->be == be && dpcm->fe == fe)
1231                         return 0;
1232         }
1233
1234         fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1235         be_substream = snd_soc_dpcm_get_substream(be, stream);
1236
1237         if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1238                 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1239                         __func__);
1240                 return -EINVAL;
1241         }
1242         if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
1243                 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
1244                 be_substream->pcm->nonatomic = 1;
1245         }
1246
1247         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1248         if (!dpcm)
1249                 return -ENOMEM;
1250
1251         dpcm->be = be;
1252         dpcm->fe = fe;
1253         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1254         snd_soc_dpcm_stream_lock_irq(fe, stream);
1255         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1256         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1257         snd_soc_dpcm_stream_unlock_irq(fe, stream);
1258
1259         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1260                         stream ? "capture" : "playback",  fe->dai_link->name,
1261                         stream ? "<-" : "->", be->dai_link->name);
1262
1263         dpcm_create_debugfs_state(dpcm, stream);
1264
1265         return 1;
1266 }
1267
1268 /* reparent a BE onto another FE */
1269 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1270                         struct snd_soc_pcm_runtime *be, int stream)
1271 {
1272         struct snd_soc_dpcm *dpcm;
1273         struct snd_pcm_substream *fe_substream, *be_substream;
1274
1275         /* reparent if BE is connected to other FEs */
1276         if (!be->dpcm[stream].users)
1277                 return;
1278
1279         be_substream = snd_soc_dpcm_get_substream(be, stream);
1280         if (!be_substream)
1281                 return;
1282
1283         for_each_dpcm_fe(be, stream, dpcm) {
1284                 if (dpcm->fe == fe)
1285                         continue;
1286
1287                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1288                         stream ? "capture" : "playback",
1289                         dpcm->fe->dai_link->name,
1290                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1291
1292                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1293                 be_substream->runtime = fe_substream->runtime;
1294                 break;
1295         }
1296 }
1297
1298 /* disconnect a BE and FE */
1299 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1300 {
1301         struct snd_soc_dpcm *dpcm, *d;
1302         LIST_HEAD(deleted_dpcms);
1303
1304         snd_soc_dpcm_mutex_assert_held(fe);
1305
1306         snd_soc_dpcm_stream_lock_irq(fe, stream);
1307         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1308                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1309                                 stream ? "capture" : "playback",
1310                                 dpcm->be->dai_link->name);
1311
1312                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1313                         continue;
1314
1315                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1316                         stream ? "capture" : "playback", fe->dai_link->name,
1317                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1318
1319                 /* BEs still alive need new FE */
1320                 dpcm_be_reparent(fe, dpcm->be, stream);
1321
1322                 list_del(&dpcm->list_be);
1323                 list_move(&dpcm->list_fe, &deleted_dpcms);
1324         }
1325         snd_soc_dpcm_stream_unlock_irq(fe, stream);
1326
1327         while (!list_empty(&deleted_dpcms)) {
1328                 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1329                                         list_fe);
1330                 list_del(&dpcm->list_fe);
1331                 dpcm_remove_debugfs_state(dpcm);
1332                 kfree(dpcm);
1333         }
1334 }
1335
1336 /* get BE for DAI widget and stream */
1337 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1338                 struct snd_soc_dapm_widget *widget, int stream)
1339 {
1340         struct snd_soc_pcm_runtime *be;
1341         struct snd_soc_dapm_widget *w;
1342         struct snd_soc_dai *dai;
1343         int i;
1344
1345         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1346
1347         for_each_card_rtds(card, be) {
1348
1349                 if (!be->dai_link->no_pcm)
1350                         continue;
1351
1352                 if (!snd_soc_dpcm_get_substream(be, stream))
1353                         continue;
1354
1355                 for_each_rtd_dais(be, i, dai) {
1356                         w = snd_soc_dai_get_widget(dai, stream);
1357
1358                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1359                                 w ? w->name : "(not set)");
1360
1361                         if (w == widget)
1362                                 return be;
1363                 }
1364         }
1365
1366         /* Widget provided is not a BE */
1367         return NULL;
1368 }
1369
1370 int widget_in_list(struct snd_soc_dapm_widget_list *list,
1371                 struct snd_soc_dapm_widget *widget)
1372 {
1373         struct snd_soc_dapm_widget *w;
1374         int i;
1375
1376         for_each_dapm_widgets(list, i, w)
1377                 if (widget == w)
1378                         return 1;
1379
1380         return 0;
1381 }
1382 EXPORT_SYMBOL_GPL(widget_in_list);
1383
1384 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
1385 {
1386         struct snd_soc_card *card = widget->dapm->card;
1387         struct snd_soc_pcm_runtime *rtd;
1388         int stream;
1389
1390         /* adjust dir to stream */
1391         if (dir == SND_SOC_DAPM_DIR_OUT)
1392                 stream = SNDRV_PCM_STREAM_PLAYBACK;
1393         else
1394                 stream = SNDRV_PCM_STREAM_CAPTURE;
1395
1396         rtd = dpcm_get_be(card, widget, stream);
1397         if (rtd)
1398                 return true;
1399
1400         return false;
1401 }
1402 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
1403
1404 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1405         int stream, struct snd_soc_dapm_widget_list **list)
1406 {
1407         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
1408         int paths;
1409
1410         if (fe->dai_link->num_cpus > 1) {
1411                 dev_err(fe->dev,
1412                         "%s doesn't support Multi CPU yet\n", __func__);
1413                 return -EINVAL;
1414         }
1415
1416         /* get number of valid DAI paths and their widgets */
1417         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1418                         fe->card->component_chaining ?
1419                                 NULL : dpcm_end_walk_at_be);
1420
1421         if (paths > 0)
1422                 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1423                         stream ? "capture" : "playback");
1424         else if (paths == 0)
1425                 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1426                          stream ? "capture" : "playback");
1427
1428         return paths;
1429 }
1430
1431 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1432 {
1433         snd_soc_dapm_dai_free_widgets(list);
1434 }
1435
1436 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1437                               struct snd_soc_dapm_widget_list *list)
1438 {
1439         struct snd_soc_dai *dai;
1440         unsigned int i;
1441
1442         /* is there a valid DAI widget for this BE */
1443         for_each_rtd_dais(dpcm->be, i, dai) {
1444                 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
1445
1446                 /*
1447                  * The BE is pruned only if none of the dai
1448                  * widgets are in the active list.
1449                  */
1450                 if (widget && widget_in_list(list, widget))
1451                         return true;
1452         }
1453
1454         return false;
1455 }
1456
1457 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1458                             struct snd_soc_dapm_widget_list **list_)
1459 {
1460         struct snd_soc_dpcm *dpcm;
1461         int prune = 0;
1462
1463         /* Destroy any old FE <--> BE connections */
1464         for_each_dpcm_be(fe, stream, dpcm) {
1465                 if (dpcm_be_is_active(dpcm, stream, *list_))
1466                         continue;
1467
1468                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1469                         stream ? "capture" : "playback",
1470                         dpcm->be->dai_link->name, fe->dai_link->name);
1471                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1472                 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1473                 prune++;
1474         }
1475
1476         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1477         return prune;
1478 }
1479
1480 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1481         struct snd_soc_dapm_widget_list **list_)
1482 {
1483         struct snd_soc_card *card = fe->card;
1484         struct snd_soc_dapm_widget_list *list = *list_;
1485         struct snd_soc_pcm_runtime *be;
1486         struct snd_soc_dapm_widget *widget;
1487         struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1488         int i, new = 0, err;
1489
1490         /* don't connect if FE is not running */
1491         if (!fe_substream->runtime && !fe->fe_compr)
1492                 return new;
1493
1494         /* Create any new FE <--> BE connections */
1495         for_each_dapm_widgets(list, i, widget) {
1496
1497                 switch (widget->id) {
1498                 case snd_soc_dapm_dai_in:
1499                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1500                                 continue;
1501                         break;
1502                 case snd_soc_dapm_dai_out:
1503                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1504                                 continue;
1505                         break;
1506                 default:
1507                         continue;
1508                 }
1509
1510                 /* is there a valid BE rtd for this widget */
1511                 be = dpcm_get_be(card, widget, stream);
1512                 if (!be) {
1513                         dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1514                                 widget->name);
1515                         continue;
1516                 }
1517
1518                 /*
1519                  * Filter for systems with 'component_chaining' enabled.
1520                  * This helps to avoid unnecessary re-configuration of an
1521                  * already active BE on such systems.
1522                  */
1523                 if (fe->card->component_chaining &&
1524                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1525                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1526                         continue;
1527
1528                 /* newly connected FE and BE */
1529                 err = dpcm_be_connect(fe, be, stream);
1530                 if (err < 0) {
1531                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1532                                 widget->name);
1533                         break;
1534                 } else if (err == 0) /* already connected */
1535                         continue;
1536
1537                 /* new */
1538                 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1539                 new++;
1540         }
1541
1542         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1543         return new;
1544 }
1545
1546 /*
1547  * Find the corresponding BE DAIs that source or sink audio to this
1548  * FE substream.
1549  */
1550 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1551         int stream, struct snd_soc_dapm_widget_list **list, int new)
1552 {
1553         if (new)
1554                 return dpcm_add_paths(fe, stream, list);
1555         else
1556                 return dpcm_prune_paths(fe, stream, list);
1557 }
1558
1559 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1560 {
1561         struct snd_soc_dpcm *dpcm;
1562
1563         for_each_dpcm_be(fe, stream, dpcm)
1564                 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1565 }
1566
1567 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1568                       int do_hw_free, struct snd_soc_dpcm *last)
1569 {
1570         struct snd_soc_dpcm *dpcm;
1571
1572         /* disable any enabled and non active backends */
1573         for_each_dpcm_be(fe, stream, dpcm) {
1574                 struct snd_soc_pcm_runtime *be = dpcm->be;
1575                 struct snd_pcm_substream *be_substream =
1576                         snd_soc_dpcm_get_substream(be, stream);
1577
1578                 if (dpcm == last)
1579                         return;
1580
1581                 /* is this op for this BE ? */
1582                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1583                         continue;
1584
1585                 if (be->dpcm[stream].users == 0) {
1586                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1587                                 stream ? "capture" : "playback",
1588                                 be->dpcm[stream].state);
1589                         continue;
1590                 }
1591
1592                 if (--be->dpcm[stream].users != 0)
1593                         continue;
1594
1595                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1596                         if (!do_hw_free)
1597                                 continue;
1598
1599                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1600                                 __soc_pcm_hw_free(be, be_substream);
1601                                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1602                         }
1603                 }
1604
1605                 __soc_pcm_close(be, be_substream);
1606                 be_substream->runtime = NULL;
1607                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1608         }
1609 }
1610
1611 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1612 {
1613         struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1614         struct snd_soc_pcm_runtime *be;
1615         struct snd_soc_dpcm *dpcm;
1616         int err, count = 0;
1617
1618         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1619         for_each_dpcm_be(fe, stream, dpcm) {
1620                 struct snd_pcm_substream *be_substream;
1621
1622                 be = dpcm->be;
1623                 be_substream = snd_soc_dpcm_get_substream(be, stream);
1624
1625                 if (!be_substream) {
1626                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1627                                 stream ? "capture" : "playback");
1628                         continue;
1629                 }
1630
1631                 /* is this op for this BE ? */
1632                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1633                         continue;
1634
1635                 /* first time the dpcm is open ? */
1636                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
1637                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1638                                 stream ? "capture" : "playback",
1639                                 be->dpcm[stream].state);
1640                         continue;
1641                 }
1642
1643                 if (be->dpcm[stream].users++ != 0)
1644                         continue;
1645
1646                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1647                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1648                         continue;
1649
1650                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1651                         stream ? "capture" : "playback", be->dai_link->name);
1652
1653                 be_substream->runtime = fe_substream->runtime;
1654                 err = __soc_pcm_open(be, be_substream);
1655                 if (err < 0) {
1656                         be->dpcm[stream].users--;
1657                         if (be->dpcm[stream].users < 0)
1658                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1659                                         stream ? "capture" : "playback",
1660                                         be->dpcm[stream].state);
1661
1662                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1663                         goto unwind;
1664                 }
1665                 be->dpcm[stream].be_start = 0;
1666                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1667                 count++;
1668         }
1669
1670         return count;
1671
1672 unwind:
1673         dpcm_be_dai_startup_rollback(fe, stream, dpcm);
1674
1675         return soc_pcm_ret(fe, err);
1676 }
1677
1678 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1679 {
1680         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1681         struct snd_pcm_runtime *runtime = substream->runtime;
1682         struct snd_pcm_hardware *hw = &runtime->hw;
1683         struct snd_soc_dai *dai;
1684         int stream = substream->stream;
1685         u64 formats = hw->formats;
1686         int i;
1687
1688         soc_pcm_hw_init(hw);
1689
1690         if (formats)
1691                 hw->formats &= formats;
1692
1693         for_each_rtd_cpu_dais(fe, i, dai) {
1694                 struct snd_soc_pcm_stream *cpu_stream;
1695
1696                 /*
1697                  * Skip CPUs which don't support the current stream
1698                  * type. See soc_pcm_init_runtime_hw() for more details
1699                  */
1700                 if (!snd_soc_dai_stream_valid(dai, stream))
1701                         continue;
1702
1703                 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1704
1705                 soc_pcm_hw_update_rate(hw, cpu_stream);
1706                 soc_pcm_hw_update_chan(hw, cpu_stream);
1707                 soc_pcm_hw_update_format(hw, cpu_stream);
1708         }
1709
1710 }
1711
1712 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1713 {
1714         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1715         struct snd_pcm_runtime *runtime = substream->runtime;
1716         struct snd_pcm_hardware *hw = &runtime->hw;
1717         struct snd_soc_dpcm *dpcm;
1718         struct snd_soc_dai *dai;
1719         int stream = substream->stream;
1720
1721         if (!fe->dai_link->dpcm_merged_format)
1722                 return;
1723
1724         /*
1725          * It returns merged BE codec format
1726          * if FE want to use it (= dpcm_merged_format)
1727          */
1728
1729         for_each_dpcm_be(fe, stream, dpcm) {
1730                 struct snd_soc_pcm_runtime *be = dpcm->be;
1731                 struct snd_soc_pcm_stream *codec_stream;
1732                 int i;
1733
1734                 for_each_rtd_codec_dais(be, i, dai) {
1735                         /*
1736                          * Skip CODECs which don't support the current stream
1737                          * type. See soc_pcm_init_runtime_hw() for more details
1738                          */
1739                         if (!snd_soc_dai_stream_valid(dai, stream))
1740                                 continue;
1741
1742                         codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1743
1744                         soc_pcm_hw_update_format(hw, codec_stream);
1745                 }
1746         }
1747 }
1748
1749 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1750 {
1751         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1752         struct snd_pcm_runtime *runtime = substream->runtime;
1753         struct snd_pcm_hardware *hw = &runtime->hw;
1754         struct snd_soc_dpcm *dpcm;
1755         int stream = substream->stream;
1756
1757         if (!fe->dai_link->dpcm_merged_chan)
1758                 return;
1759
1760         /*
1761          * It returns merged BE codec channel;
1762          * if FE want to use it (= dpcm_merged_chan)
1763          */
1764
1765         for_each_dpcm_be(fe, stream, dpcm) {
1766                 struct snd_soc_pcm_runtime *be = dpcm->be;
1767                 struct snd_soc_pcm_stream *cpu_stream;
1768                 struct snd_soc_dai *dai;
1769                 int i;
1770
1771                 for_each_rtd_cpu_dais(be, i, dai) {
1772                         /*
1773                          * Skip CPUs which don't support the current stream
1774                          * type. See soc_pcm_init_runtime_hw() for more details
1775                          */
1776                         if (!snd_soc_dai_stream_valid(dai, stream))
1777                                 continue;
1778
1779                         cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1780
1781                         soc_pcm_hw_update_chan(hw, cpu_stream);
1782                 }
1783
1784                 /*
1785                  * chan min/max cannot be enforced if there are multiple CODEC
1786                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1787                  */
1788                 if (be->dai_link->num_codecs == 1) {
1789                         struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1790                                 asoc_rtd_to_codec(be, 0), stream);
1791
1792                         soc_pcm_hw_update_chan(hw, codec_stream);
1793                 }
1794         }
1795 }
1796
1797 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1798 {
1799         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1800         struct snd_pcm_runtime *runtime = substream->runtime;
1801         struct snd_pcm_hardware *hw = &runtime->hw;
1802         struct snd_soc_dpcm *dpcm;
1803         int stream = substream->stream;
1804
1805         if (!fe->dai_link->dpcm_merged_rate)
1806                 return;
1807
1808         /*
1809          * It returns merged BE codec channel;
1810          * if FE want to use it (= dpcm_merged_chan)
1811          */
1812
1813         for_each_dpcm_be(fe, stream, dpcm) {
1814                 struct snd_soc_pcm_runtime *be = dpcm->be;
1815                 struct snd_soc_pcm_stream *pcm;
1816                 struct snd_soc_dai *dai;
1817                 int i;
1818
1819                 for_each_rtd_dais(be, i, dai) {
1820                         /*
1821                          * Skip DAIs which don't support the current stream
1822                          * type. See soc_pcm_init_runtime_hw() for more details
1823                          */
1824                         if (!snd_soc_dai_stream_valid(dai, stream))
1825                                 continue;
1826
1827                         pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1828
1829                         soc_pcm_hw_update_rate(hw, pcm);
1830                 }
1831         }
1832 }
1833
1834 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1835                                int stream)
1836 {
1837         struct snd_soc_dpcm *dpcm;
1838         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1839         struct snd_soc_dai *fe_cpu_dai;
1840         int err = 0;
1841         int i;
1842
1843         /* apply symmetry for FE */
1844         soc_pcm_update_symmetry(fe_substream);
1845
1846         for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1847                 /* Symmetry only applies if we've got an active stream. */
1848                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1849                 if (err < 0)
1850                         goto error;
1851         }
1852
1853         /* apply symmetry for BE */
1854         for_each_dpcm_be(fe, stream, dpcm) {
1855                 struct snd_soc_pcm_runtime *be = dpcm->be;
1856                 struct snd_pcm_substream *be_substream =
1857                         snd_soc_dpcm_get_substream(be, stream);
1858                 struct snd_soc_pcm_runtime *rtd;
1859                 struct snd_soc_dai *dai;
1860
1861                 /* A backend may not have the requested substream */
1862                 if (!be_substream)
1863                         continue;
1864
1865                 rtd = asoc_substream_to_rtd(be_substream);
1866                 if (rtd->dai_link->be_hw_params_fixup)
1867                         continue;
1868
1869                 soc_pcm_update_symmetry(be_substream);
1870
1871                 /* Symmetry only applies if we've got an active stream. */
1872                 for_each_rtd_dais(rtd, i, dai) {
1873                         err = soc_pcm_apply_symmetry(fe_substream, dai);
1874                         if (err < 0)
1875                                 goto error;
1876                 }
1877         }
1878 error:
1879         return soc_pcm_ret(fe, err);
1880 }
1881
1882 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1883 {
1884         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1885         int stream = fe_substream->stream, ret = 0;
1886
1887         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1888
1889         ret = dpcm_be_dai_startup(fe, stream);
1890         if (ret < 0)
1891                 goto be_err;
1892
1893         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1894
1895         /* start the DAI frontend */
1896         ret = __soc_pcm_open(fe, fe_substream);
1897         if (ret < 0)
1898                 goto unwind;
1899
1900         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1901
1902         dpcm_runtime_setup_fe(fe_substream);
1903
1904         dpcm_runtime_setup_be_format(fe_substream);
1905         dpcm_runtime_setup_be_chan(fe_substream);
1906         dpcm_runtime_setup_be_rate(fe_substream);
1907
1908         ret = dpcm_apply_symmetry(fe_substream, stream);
1909
1910 unwind:
1911         if (ret < 0)
1912                 dpcm_be_dai_startup_unwind(fe, stream);
1913 be_err:
1914         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1915
1916         return soc_pcm_ret(fe, ret);
1917 }
1918
1919 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1920 {
1921         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1922         int stream = substream->stream;
1923
1924         snd_soc_dpcm_mutex_assert_held(fe);
1925
1926         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1927
1928         /* shutdown the BEs */
1929         dpcm_be_dai_shutdown(fe, stream);
1930
1931         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1932
1933         /* now shutdown the frontend */
1934         __soc_pcm_close(fe, substream);
1935
1936         /* run the stream stop event */
1937         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1938
1939         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1940         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1941         return 0;
1942 }
1943
1944 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1945 {
1946         struct snd_soc_dpcm *dpcm;
1947
1948         /* only hw_params backends that are either sinks or sources
1949          * to this frontend DAI */
1950         for_each_dpcm_be(fe, stream, dpcm) {
1951
1952                 struct snd_soc_pcm_runtime *be = dpcm->be;
1953                 struct snd_pcm_substream *be_substream =
1954                         snd_soc_dpcm_get_substream(be, stream);
1955
1956                 /* is this op for this BE ? */
1957                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1958                         continue;
1959
1960                 /* only free hw when no longer used - check all FEs */
1961                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1962                                 continue;
1963
1964                 /* do not free hw if this BE is used by other FE */
1965                 if (be->dpcm[stream].users > 1)
1966                         continue;
1967
1968                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1969                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1970                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1971                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1972                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1973                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1974                         continue;
1975
1976                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1977                         be->dai_link->name);
1978
1979                 __soc_pcm_hw_free(be, be_substream);
1980
1981                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1982         }
1983 }
1984
1985 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1986 {
1987         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1988         int stream = substream->stream;
1989
1990         snd_soc_dpcm_mutex_lock(fe);
1991         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1992
1993         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1994
1995         /* call hw_free on the frontend */
1996         soc_pcm_hw_clean(fe, substream, 0);
1997
1998         /* only hw_params backends that are either sinks or sources
1999          * to this frontend DAI */
2000         dpcm_be_dai_hw_free(fe, stream);
2001
2002         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2003         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2004
2005         snd_soc_dpcm_mutex_unlock(fe);
2006         return 0;
2007 }
2008
2009 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2010 {
2011         struct snd_soc_pcm_runtime *be;
2012         struct snd_pcm_substream *be_substream;
2013         struct snd_soc_dpcm *dpcm;
2014         int ret;
2015
2016         for_each_dpcm_be(fe, stream, dpcm) {
2017                 struct snd_pcm_hw_params hw_params;
2018
2019                 be = dpcm->be;
2020                 be_substream = snd_soc_dpcm_get_substream(be, stream);
2021
2022                 /* is this op for this BE ? */
2023                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2024                         continue;
2025
2026                 /* copy params for each dpcm */
2027                 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
2028                                 sizeof(struct snd_pcm_hw_params));
2029
2030                 /* perform any hw_params fixups */
2031                 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
2032                 if (ret < 0)
2033                         goto unwind;
2034
2035                 /* copy the fixed-up hw params for BE dai */
2036                 memcpy(&be->dpcm[stream].hw_params, &hw_params,
2037                        sizeof(struct snd_pcm_hw_params));
2038
2039                 /* only allow hw_params() if no connected FEs are running */
2040                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2041                         continue;
2042
2043                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2044                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2045                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2046                         continue;
2047
2048                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2049                         be->dai_link->name);
2050
2051                 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
2052                 if (ret < 0)
2053                         goto unwind;
2054
2055                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2056         }
2057         return 0;
2058
2059 unwind:
2060         dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2061                 __func__, be->dai_link->name, ret);
2062
2063         /* disable any enabled and non active backends */
2064         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2065                 be = dpcm->be;
2066                 be_substream = snd_soc_dpcm_get_substream(be, stream);
2067
2068                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2069                         continue;
2070
2071                 /* only allow hw_free() if no connected FEs are running */
2072                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2073                         continue;
2074
2075                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2076                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2077                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2078                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2079                         continue;
2080
2081                 __soc_pcm_hw_free(be, be_substream);
2082         }
2083
2084         return ret;
2085 }
2086
2087 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2088                                  struct snd_pcm_hw_params *params)
2089 {
2090         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2091         int ret, stream = substream->stream;
2092
2093         snd_soc_dpcm_mutex_lock(fe);
2094         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2095
2096         memcpy(&fe->dpcm[stream].hw_params, params,
2097                         sizeof(struct snd_pcm_hw_params));
2098         ret = dpcm_be_dai_hw_params(fe, stream);
2099         if (ret < 0)
2100                 goto out;
2101
2102         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2103                         fe->dai_link->name, params_rate(params),
2104                         params_channels(params), params_format(params));
2105
2106         /* call hw_params on the frontend */
2107         ret = __soc_pcm_hw_params(fe, substream, params);
2108         if (ret < 0)
2109                 dpcm_be_dai_hw_free(fe, stream);
2110         else
2111                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2112
2113 out:
2114         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2115         snd_soc_dpcm_mutex_unlock(fe);
2116
2117         return soc_pcm_ret(fe, ret);
2118 }
2119
2120 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2121                                int cmd)
2122 {
2123         struct snd_soc_pcm_runtime *be;
2124         bool pause_stop_transition;
2125         struct snd_soc_dpcm *dpcm;
2126         unsigned long flags;
2127         int ret = 0;
2128
2129         for_each_dpcm_be(fe, stream, dpcm) {
2130                 struct snd_pcm_substream *be_substream;
2131
2132                 be = dpcm->be;
2133                 be_substream = snd_soc_dpcm_get_substream(be, stream);
2134
2135                 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
2136
2137                 /* is this op for this BE ? */
2138                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2139                         goto next;
2140
2141                 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2142                         be->dai_link->name, cmd);
2143
2144                 switch (cmd) {
2145                 case SNDRV_PCM_TRIGGER_START:
2146                         if (!be->dpcm[stream].be_start &&
2147                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2148                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2149                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2150                                 goto next;
2151
2152                         be->dpcm[stream].be_start++;
2153                         if (be->dpcm[stream].be_start != 1)
2154                                 goto next;
2155
2156                         if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2157                                 ret = soc_pcm_trigger(be_substream,
2158                                                       SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2159                         else
2160                                 ret = soc_pcm_trigger(be_substream,
2161                                                       SNDRV_PCM_TRIGGER_START);
2162                         if (ret) {
2163                                 be->dpcm[stream].be_start--;
2164                                 goto next;
2165                         }
2166
2167                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2168                         break;
2169                 case SNDRV_PCM_TRIGGER_RESUME:
2170                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2171                                 goto next;
2172
2173                         be->dpcm[stream].be_start++;
2174                         if (be->dpcm[stream].be_start != 1)
2175                                 goto next;
2176
2177                         ret = soc_pcm_trigger(be_substream, cmd);
2178                         if (ret) {
2179                                 be->dpcm[stream].be_start--;
2180                                 goto next;
2181                         }
2182
2183                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2184                         break;
2185                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2186                         if (!be->dpcm[stream].be_start &&
2187                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2188                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2189                                 goto next;
2190
2191                         fe->dpcm[stream].fe_pause = false;
2192                         be->dpcm[stream].be_pause--;
2193
2194                         be->dpcm[stream].be_start++;
2195                         if (be->dpcm[stream].be_start != 1)
2196                                 goto next;
2197
2198                         ret = soc_pcm_trigger(be_substream, cmd);
2199                         if (ret) {
2200                                 be->dpcm[stream].be_start--;
2201                                 goto next;
2202                         }
2203
2204                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2205                         break;
2206                 case SNDRV_PCM_TRIGGER_STOP:
2207                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2208                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2209                                 goto next;
2210
2211                         if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2212                                 be->dpcm[stream].be_start--;
2213
2214                         if (be->dpcm[stream].be_start != 0)
2215                                 goto next;
2216
2217                         pause_stop_transition = false;
2218                         if (fe->dpcm[stream].fe_pause) {
2219                                 pause_stop_transition = true;
2220                                 fe->dpcm[stream].fe_pause = false;
2221                                 be->dpcm[stream].be_pause--;
2222                         }
2223
2224                         if (be->dpcm[stream].be_pause != 0)
2225                                 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2226                         else
2227                                 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2228
2229                         if (ret) {
2230                                 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2231                                         be->dpcm[stream].be_start++;
2232                                 if (pause_stop_transition) {
2233                                         fe->dpcm[stream].fe_pause = true;
2234                                         be->dpcm[stream].be_pause++;
2235                                 }
2236                                 goto next;
2237                         }
2238
2239                         if (be->dpcm[stream].be_pause != 0)
2240                                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2241                         else
2242                                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2243
2244                         break;
2245                 case SNDRV_PCM_TRIGGER_SUSPEND:
2246                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2247                                 goto next;
2248
2249                         be->dpcm[stream].be_start--;
2250                         if (be->dpcm[stream].be_start != 0)
2251                                 goto next;
2252
2253                         ret = soc_pcm_trigger(be_substream, cmd);
2254                         if (ret) {
2255                                 be->dpcm[stream].be_start++;
2256                                 goto next;
2257                         }
2258
2259                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2260                         break;
2261                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2262                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2263                                 goto next;
2264
2265                         fe->dpcm[stream].fe_pause = true;
2266                         be->dpcm[stream].be_pause++;
2267
2268                         be->dpcm[stream].be_start--;
2269                         if (be->dpcm[stream].be_start != 0)
2270                                 goto next;
2271
2272                         ret = soc_pcm_trigger(be_substream, cmd);
2273                         if (ret) {
2274                                 be->dpcm[stream].be_start++;
2275                                 goto next;
2276                         }
2277
2278                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2279                         break;
2280                 }
2281 next:
2282                 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2283                 if (ret)
2284                         break;
2285         }
2286         return soc_pcm_ret(fe, ret);
2287 }
2288 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2289
2290 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2291                                   int cmd, bool fe_first)
2292 {
2293         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2294         int ret;
2295
2296         /* call trigger on the frontend before the backend. */
2297         if (fe_first) {
2298                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2299                         fe->dai_link->name, cmd);
2300
2301                 ret = soc_pcm_trigger(substream, cmd);
2302                 if (ret < 0)
2303                         return ret;
2304
2305                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2306                 return ret;
2307         }
2308
2309         /* call trigger on the frontend after the backend. */
2310         ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2311         if (ret < 0)
2312                 return ret;
2313
2314         dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2315                 fe->dai_link->name, cmd);
2316
2317         ret = soc_pcm_trigger(substream, cmd);
2318
2319         return ret;
2320 }
2321
2322 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2323 {
2324         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2325         int stream = substream->stream;
2326         int ret = 0;
2327         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2328
2329         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2330
2331         switch (trigger) {
2332         case SND_SOC_DPCM_TRIGGER_PRE:
2333                 switch (cmd) {
2334                 case SNDRV_PCM_TRIGGER_START:
2335                 case SNDRV_PCM_TRIGGER_RESUME:
2336                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2337                 case SNDRV_PCM_TRIGGER_DRAIN:
2338                         ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2339                         break;
2340                 case SNDRV_PCM_TRIGGER_STOP:
2341                 case SNDRV_PCM_TRIGGER_SUSPEND:
2342                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2343                         ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2344                         break;
2345                 default:
2346                         ret = -EINVAL;
2347                         break;
2348                 }
2349                 break;
2350         case SND_SOC_DPCM_TRIGGER_POST:
2351                 switch (cmd) {
2352                 case SNDRV_PCM_TRIGGER_START:
2353                 case SNDRV_PCM_TRIGGER_RESUME:
2354                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2355                 case SNDRV_PCM_TRIGGER_DRAIN:
2356                         ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2357                         break;
2358                 case SNDRV_PCM_TRIGGER_STOP:
2359                 case SNDRV_PCM_TRIGGER_SUSPEND:
2360                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2361                         ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2362                         break;
2363                 default:
2364                         ret = -EINVAL;
2365                         break;
2366                 }
2367                 break;
2368         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2369                 /* bespoke trigger() - handles both FE and BEs */
2370
2371                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2372                                 fe->dai_link->name, cmd);
2373
2374                 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2375                 break;
2376         default:
2377                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2378                                 fe->dai_link->name);
2379                 ret = -EINVAL;
2380                 goto out;
2381         }
2382
2383         if (ret < 0) {
2384                 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2385                         cmd, ret);
2386                 goto out;
2387         }
2388
2389         switch (cmd) {
2390         case SNDRV_PCM_TRIGGER_START:
2391         case SNDRV_PCM_TRIGGER_RESUME:
2392         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2393                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2394                 break;
2395         case SNDRV_PCM_TRIGGER_STOP:
2396         case SNDRV_PCM_TRIGGER_SUSPEND:
2397                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2398                 break;
2399         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2400                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2401                 break;
2402         }
2403
2404 out:
2405         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2406         return ret;
2407 }
2408
2409 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2410 {
2411         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2412         int stream = substream->stream;
2413
2414         /* if FE's runtime_update is already set, we're in race;
2415          * process this trigger later at exit
2416          */
2417         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2418                 fe->dpcm[stream].trigger_pending = cmd + 1;
2419                 return 0; /* delayed, assuming it's successful */
2420         }
2421
2422         /* we're alone, let's trigger */
2423         return dpcm_fe_dai_do_trigger(substream, cmd);
2424 }
2425
2426 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2427 {
2428         struct snd_soc_dpcm *dpcm;
2429         int ret = 0;
2430
2431         for_each_dpcm_be(fe, stream, dpcm) {
2432
2433                 struct snd_soc_pcm_runtime *be = dpcm->be;
2434                 struct snd_pcm_substream *be_substream =
2435                         snd_soc_dpcm_get_substream(be, stream);
2436
2437                 /* is this op for this BE ? */
2438                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2439                         continue;
2440
2441                 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2442                         continue;
2443
2444                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2445                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2446                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2447                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2448                         continue;
2449
2450                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2451                         be->dai_link->name);
2452
2453                 ret = __soc_pcm_prepare(be, be_substream);
2454                 if (ret < 0)
2455                         break;
2456
2457                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2458         }
2459
2460         return soc_pcm_ret(fe, ret);
2461 }
2462
2463 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2464 {
2465         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2466         int stream = substream->stream, ret = 0;
2467
2468         snd_soc_dpcm_mutex_lock(fe);
2469
2470         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2471
2472         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2473
2474         /* there is no point preparing this FE if there are no BEs */
2475         if (list_empty(&fe->dpcm[stream].be_clients)) {
2476                 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */
2477                 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n",
2478                              fe->dai_link->name);
2479                 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2480                         fe->dai_link->name);
2481                 ret = -EINVAL;
2482                 goto out;
2483         }
2484
2485         ret = dpcm_be_dai_prepare(fe, stream);
2486         if (ret < 0)
2487                 goto out;
2488
2489         /* call prepare on the frontend */
2490         ret = __soc_pcm_prepare(fe, substream);
2491         if (ret < 0)
2492                 goto out;
2493
2494         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2495
2496 out:
2497         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2498         snd_soc_dpcm_mutex_unlock(fe);
2499
2500         return soc_pcm_ret(fe, ret);
2501 }
2502
2503 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2504 {
2505         struct snd_pcm_substream *substream =
2506                 snd_soc_dpcm_get_substream(fe, stream);
2507         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2508         int err;
2509
2510         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2511                         stream ? "capture" : "playback", fe->dai_link->name);
2512
2513         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2514                 /* call bespoke trigger - FE takes care of all BE triggers */
2515                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2516                                 fe->dai_link->name);
2517
2518                 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2519         } else {
2520                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2521                         fe->dai_link->name);
2522
2523                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2524         }
2525
2526         dpcm_be_dai_hw_free(fe, stream);
2527
2528         dpcm_be_dai_shutdown(fe, stream);
2529
2530         /* run the stream event for each BE */
2531         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2532
2533         return soc_pcm_ret(fe, err);
2534 }
2535
2536 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2537 {
2538         struct snd_pcm_substream *substream =
2539                 snd_soc_dpcm_get_substream(fe, stream);
2540         struct snd_soc_dpcm *dpcm;
2541         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2542         int ret = 0;
2543
2544         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2545                         stream ? "capture" : "playback", fe->dai_link->name);
2546
2547         /* Only start the BE if the FE is ready */
2548         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2549                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2550                 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2551                         fe->dai_link->name, fe->dpcm[stream].state);
2552                 ret = -EINVAL;
2553                 goto disconnect;
2554         }
2555
2556         /* startup must always be called for new BEs */
2557         ret = dpcm_be_dai_startup(fe, stream);
2558         if (ret < 0)
2559                 goto disconnect;
2560
2561         /* keep going if FE state is > open */
2562         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2563                 return 0;
2564
2565         ret = dpcm_be_dai_hw_params(fe, stream);
2566         if (ret < 0)
2567                 goto close;
2568
2569         /* keep going if FE state is > hw_params */
2570         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2571                 return 0;
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 = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2591                 if (ret < 0)
2592                         goto hw_free;
2593         } else {
2594                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2595                         fe->dai_link->name);
2596
2597                 ret = dpcm_be_dai_trigger(fe, stream,
2598                                         SNDRV_PCM_TRIGGER_START);
2599                 if (ret < 0)
2600                         goto hw_free;
2601         }
2602
2603         return 0;
2604
2605 hw_free:
2606         dpcm_be_dai_hw_free(fe, stream);
2607 close:
2608         dpcm_be_dai_shutdown(fe, stream);
2609 disconnect:
2610         /* disconnect any pending BEs */
2611         for_each_dpcm_be(fe, stream, dpcm) {
2612                 struct snd_soc_pcm_runtime *be = dpcm->be;
2613
2614                 /* is this op for this BE ? */
2615                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2616                         continue;
2617
2618                 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2619                         be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2620                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2621         }
2622
2623         return soc_pcm_ret(fe, ret);
2624 }
2625
2626 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2627 {
2628         struct snd_soc_dapm_widget_list *list;
2629         int stream;
2630         int count, paths;
2631
2632         if (!fe->dai_link->dynamic)
2633                 return 0;
2634
2635         if (fe->dai_link->num_cpus > 1) {
2636                 dev_err(fe->dev,
2637                         "%s doesn't support Multi CPU yet\n", __func__);
2638                 return -EINVAL;
2639         }
2640
2641         /* only check active links */
2642         if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
2643                 return 0;
2644
2645         /* DAPM sync will call this to update DSP paths */
2646         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2647                 new ? "new" : "old", fe->dai_link->name);
2648
2649         for_each_pcm_streams(stream) {
2650
2651                 /* skip if FE doesn't have playback/capture capability */
2652                 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0),   stream) ||
2653                     !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
2654                         continue;
2655
2656                 /* skip if FE isn't currently playing/capturing */
2657                 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2658                     !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
2659                         continue;
2660
2661                 paths = dpcm_path_get(fe, stream, &list);
2662                 if (paths < 0)
2663                         return paths;
2664
2665                 /* update any playback/capture paths */
2666                 count = dpcm_process_paths(fe, stream, &list, new);
2667                 if (count) {
2668                         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2669                         if (new)
2670                                 dpcm_run_update_startup(fe, stream);
2671                         else
2672                                 dpcm_run_update_shutdown(fe, stream);
2673                         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2674
2675                         dpcm_clear_pending_state(fe, stream);
2676                         dpcm_be_disconnect(fe, stream);
2677                 }
2678
2679                 dpcm_path_put(&list);
2680         }
2681
2682         return 0;
2683 }
2684
2685 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2686  * any DAI links.
2687  */
2688 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2689 {
2690         struct snd_soc_pcm_runtime *fe;
2691         int ret = 0;
2692
2693         snd_soc_dpcm_mutex_lock(card);
2694         /* shutdown all old paths first */
2695         for_each_card_rtds(card, fe) {
2696                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2697                 if (ret)
2698                         goto out;
2699         }
2700
2701         /* bring new paths up */
2702         for_each_card_rtds(card, fe) {
2703                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2704                 if (ret)
2705                         goto out;
2706         }
2707
2708 out:
2709         snd_soc_dpcm_mutex_unlock(card);
2710         return ret;
2711 }
2712 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2713
2714 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2715 {
2716         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2717         struct snd_soc_dpcm *dpcm;
2718         int stream = fe_substream->stream;
2719
2720         snd_soc_dpcm_mutex_assert_held(fe);
2721
2722         /* mark FE's links ready to prune */
2723         for_each_dpcm_be(fe, stream, dpcm)
2724                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2725
2726         dpcm_be_disconnect(fe, stream);
2727 }
2728
2729 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2730 {
2731         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2732         int ret;
2733
2734         snd_soc_dpcm_mutex_lock(fe);
2735         ret = dpcm_fe_dai_shutdown(fe_substream);
2736
2737         dpcm_fe_dai_cleanup(fe_substream);
2738
2739         snd_soc_dpcm_mutex_unlock(fe);
2740         return ret;
2741 }
2742
2743 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2744 {
2745         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2746         struct snd_soc_dapm_widget_list *list;
2747         int ret;
2748         int stream = fe_substream->stream;
2749
2750         snd_soc_dpcm_mutex_lock(fe);
2751
2752         ret = dpcm_path_get(fe, stream, &list);
2753         if (ret < 0)
2754                 goto open_end;
2755
2756         /* calculate valid and active FE <-> BE dpcms */
2757         dpcm_process_paths(fe, stream, &list, 1);
2758
2759         ret = dpcm_fe_dai_startup(fe_substream);
2760         if (ret < 0)
2761                 dpcm_fe_dai_cleanup(fe_substream);
2762
2763         dpcm_clear_pending_state(fe, stream);
2764         dpcm_path_put(&list);
2765 open_end:
2766         snd_soc_dpcm_mutex_unlock(fe);
2767         return ret;
2768 }
2769
2770 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2771                                     int *playback, int *capture)
2772 {
2773         struct snd_soc_dai_link *dai_link = rtd->dai_link;
2774         struct snd_soc_dai *cpu_dai;
2775         int has_playback = 0;
2776         int has_capture  = 0;
2777         int i;
2778
2779         if (dai_link->dynamic && dai_link->num_cpus > 1) {
2780                 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2781                 return -EINVAL;
2782         }
2783
2784         if (dai_link->dynamic || dai_link->no_pcm) {
2785                 int stream;
2786
2787                 if (dai_link->dpcm_playback) {
2788                         stream = SNDRV_PCM_STREAM_PLAYBACK;
2789
2790                         for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2791                                 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2792                                         has_playback = 1;
2793                                         break;
2794                                 }
2795                         }
2796                         if (!has_playback) {
2797                                 dev_err(rtd->card->dev,
2798                                         "No CPU DAIs support playback for stream %s\n",
2799                                         dai_link->stream_name);
2800                                 return -EINVAL;
2801                         }
2802                 }
2803                 if (dai_link->dpcm_capture) {
2804                         stream = SNDRV_PCM_STREAM_CAPTURE;
2805
2806                         for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2807                                 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2808                                         has_capture = 1;
2809                                         break;
2810                                 }
2811                         }
2812
2813                         if (!has_capture) {
2814                                 dev_err(rtd->card->dev,
2815                                         "No CPU DAIs support capture for stream %s\n",
2816                                         dai_link->stream_name);
2817                                 return -EINVAL;
2818                         }
2819                 }
2820         } else {
2821                 struct snd_soc_dai *codec_dai;
2822
2823                 /* Adapt stream for codec2codec links */
2824                 int cpu_capture  = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE);
2825                 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK);
2826
2827                 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2828                         if (dai_link->num_cpus == 1) {
2829                                 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
2830                         } else if (dai_link->num_cpus == dai_link->num_codecs) {
2831                                 cpu_dai = asoc_rtd_to_cpu(rtd, i);
2832                         } else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) {
2833                                 int cpu_id;
2834
2835                                 if (!rtd->dai_link->codec_ch_maps) {
2836                                         dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n",
2837                                                 __func__);
2838                                         return -EINVAL;
2839                                 }
2840
2841                                 cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id;
2842                                 cpu_dai = asoc_rtd_to_cpu(rtd, cpu_id);
2843                         } else {
2844                                 dev_err(rtd->card->dev,
2845                                         "%s codec number %d < cpu number %d is not supported\n",
2846                                         __func__, rtd->dai_link->num_codecs,
2847                                         rtd->dai_link->num_cpus);
2848                                 return -EINVAL;
2849                         }
2850
2851                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2852                             snd_soc_dai_stream_valid(cpu_dai,   cpu_playback))
2853                                 has_playback = 1;
2854                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2855                             snd_soc_dai_stream_valid(cpu_dai,   cpu_capture))
2856                                 has_capture = 1;
2857                 }
2858         }
2859
2860         if (dai_link->playback_only)
2861                 has_capture = 0;
2862
2863         if (dai_link->capture_only)
2864                 has_playback = 0;
2865
2866         if (!has_playback && !has_capture) {
2867                 dev_err(rtd->dev, "substream %s has no playback, no capture\n",
2868                         dai_link->stream_name);
2869
2870                 return -EINVAL;
2871         }
2872
2873         *playback = has_playback;
2874         *capture  = has_capture;
2875
2876         return 0;
2877 }
2878
2879 static int soc_create_pcm(struct snd_pcm **pcm,
2880                           struct snd_soc_pcm_runtime *rtd,
2881                           int playback, int capture, int num)
2882 {
2883         char new_name[64];
2884         int ret;
2885
2886         /* create the PCM */
2887         if (rtd->dai_link->c2c_params) {
2888                 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2889                          rtd->dai_link->stream_name);
2890
2891                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2892                                            playback, capture, pcm);
2893         } else if (rtd->dai_link->no_pcm) {
2894                 snprintf(new_name, sizeof(new_name), "(%s)",
2895                         rtd->dai_link->stream_name);
2896
2897                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2898                                 playback, capture, pcm);
2899         } else {
2900                 if (rtd->dai_link->dynamic)
2901                         snprintf(new_name, sizeof(new_name), "%s (*)",
2902                                 rtd->dai_link->stream_name);
2903                 else
2904                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2905                                 rtd->dai_link->stream_name,
2906                                 soc_codec_dai_name(rtd), num);
2907
2908                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2909                         capture, pcm);
2910         }
2911         if (ret < 0) {
2912                 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2913                         new_name, rtd->dai_link->name, ret);
2914                 return ret;
2915         }
2916         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2917
2918         return 0;
2919 }
2920
2921 /* create a new pcm */
2922 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2923 {
2924         struct snd_soc_component *component;
2925         struct snd_pcm *pcm;
2926         int ret = 0, playback = 0, capture = 0;
2927         int i;
2928
2929         ret = soc_get_playback_capture(rtd, &playback, &capture);
2930         if (ret < 0)
2931                 return ret;
2932
2933         ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2934         if (ret < 0)
2935                 return ret;
2936
2937         /* DAPM dai link stream work */
2938         /*
2939          * Currently nothing to do for c2c links
2940          * Since c2c links are internal nodes in the DAPM graph and
2941          * don't interface with the outside world or application layer
2942          * we don't have to do any special handling on close.
2943          */
2944         if (!rtd->dai_link->c2c_params)
2945                 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2946
2947         rtd->pcm = pcm;
2948         pcm->nonatomic = rtd->dai_link->nonatomic;
2949         pcm->private_data = rtd;
2950         pcm->no_device_suspend = true;
2951
2952         if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) {
2953                 if (playback)
2954                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2955                 if (capture)
2956                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2957                 goto out;
2958         }
2959
2960         /* ASoC PCM operations */
2961         if (rtd->dai_link->dynamic) {
2962                 rtd->ops.open           = dpcm_fe_dai_open;
2963                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
2964                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
2965                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
2966                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
2967                 rtd->ops.close          = dpcm_fe_dai_close;
2968                 rtd->ops.pointer        = soc_pcm_pointer;
2969         } else {
2970                 rtd->ops.open           = soc_pcm_open;
2971                 rtd->ops.hw_params      = soc_pcm_hw_params;
2972                 rtd->ops.prepare        = soc_pcm_prepare;
2973                 rtd->ops.trigger        = soc_pcm_trigger;
2974                 rtd->ops.hw_free        = soc_pcm_hw_free;
2975                 rtd->ops.close          = soc_pcm_close;
2976                 rtd->ops.pointer        = soc_pcm_pointer;
2977         }
2978
2979         for_each_rtd_components(rtd, i, component) {
2980                 const struct snd_soc_component_driver *drv = component->driver;
2981
2982                 if (drv->ioctl)
2983                         rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2984                 if (drv->sync_stop)
2985                         rtd->ops.sync_stop      = snd_soc_pcm_component_sync_stop;
2986                 if (drv->copy)
2987                         rtd->ops.copy           = snd_soc_pcm_component_copy;
2988                 if (drv->page)
2989                         rtd->ops.page           = snd_soc_pcm_component_page;
2990                 if (drv->mmap)
2991                         rtd->ops.mmap           = snd_soc_pcm_component_mmap;
2992                 if (drv->ack)
2993                         rtd->ops.ack            = snd_soc_pcm_component_ack;
2994         }
2995
2996         if (playback)
2997                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2998
2999         if (capture)
3000                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3001
3002         ret = snd_soc_pcm_component_new(rtd);
3003         if (ret < 0)
3004                 return ret;
3005 out:
3006         dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
3007                 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
3008         return ret;
3009 }
3010
3011 /* is the current PCM operation for this FE ? */
3012 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3013 {
3014         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3015                 return 1;
3016         return 0;
3017 }
3018 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3019
3020 /* is the current PCM operation for this BE ? */
3021 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3022                 struct snd_soc_pcm_runtime *be, int stream)
3023 {
3024         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3025            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3026                   be->dpcm[stream].runtime_update))
3027                 return 1;
3028         return 0;
3029 }
3030 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3031
3032 /* get the substream for this BE */
3033 struct snd_pcm_substream *
3034         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3035 {
3036         return be->pcm->streams[stream].substream;
3037 }
3038 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3039
3040 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
3041                                     struct snd_soc_pcm_runtime *be,
3042                                     int stream,
3043                                     const enum snd_soc_dpcm_state *states,
3044                                     int num_states)
3045 {
3046         struct snd_soc_dpcm *dpcm;
3047         int state;
3048         int ret = 1;
3049         int i;
3050
3051         for_each_dpcm_fe(be, stream, dpcm) {
3052
3053                 if (dpcm->fe == fe)
3054                         continue;
3055
3056                 state = dpcm->fe->dpcm[stream].state;
3057                 for (i = 0; i < num_states; i++) {
3058                         if (state == states[i]) {
3059                                 ret = 0;
3060                                 break;
3061                         }
3062                 }
3063         }
3064
3065         /* it's safe to do this BE DAI */
3066         return ret;
3067 }
3068
3069 /*
3070  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3071  * are not running, paused or suspended for the specified stream direction.
3072  */
3073 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3074                 struct snd_soc_pcm_runtime *be, int stream)
3075 {
3076         const enum snd_soc_dpcm_state state[] = {
3077                 SND_SOC_DPCM_STATE_START,
3078                 SND_SOC_DPCM_STATE_PAUSED,
3079                 SND_SOC_DPCM_STATE_SUSPEND,
3080         };
3081
3082         return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3083 }
3084 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3085
3086 /*
3087  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3088  * running, paused or suspended for the specified stream direction.
3089  */
3090 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3091                 struct snd_soc_pcm_runtime *be, int stream)
3092 {
3093         const enum snd_soc_dpcm_state state[] = {
3094                 SND_SOC_DPCM_STATE_START,
3095                 SND_SOC_DPCM_STATE_PAUSED,
3096                 SND_SOC_DPCM_STATE_SUSPEND,
3097                 SND_SOC_DPCM_STATE_PREPARE,
3098         };
3099
3100         return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3101 }
3102 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3103
3104 /*
3105  * We can only prepare a BE DAI if any of it's FE are not prepared,
3106  * running or paused for the specified stream direction.
3107  */
3108 int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
3109                                  struct snd_soc_pcm_runtime *be, int stream)
3110 {
3111         const enum snd_soc_dpcm_state state[] = {
3112                 SND_SOC_DPCM_STATE_START,
3113                 SND_SOC_DPCM_STATE_PAUSED,
3114                 SND_SOC_DPCM_STATE_PREPARE,
3115         };
3116
3117         return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3118 }
3119 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);