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                 /* clear the corresponding DAIs parameters when going to be inactive */
 702                 for_each_rtd_dais(rtd, i, dai) {
 703                         if (snd_soc_dai_active(dai) == 0)
 704                                 soc_pcm_set_dai_params(dai, NULL);
 705
 706                         if (snd_soc_dai_stream_active(dai, substream->stream) == 0)
 707                                 snd_soc_dai_digital_mute(dai, 1, substream->stream);
 708                 }
 709         }
 710
 711         for_each_rtd_dais(rtd, i, dai)
 712                 snd_soc_dai_shutdown(dai, substream, rollback);
 713
 714         snd_soc_link_shutdown(substream, rollback);
 715
 716         soc_pcm_components_close(substream, rollback);
 717
 718         snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
 719
 720         for_each_rtd_components(rtd, i, component)
 721                 if (!snd_soc_component_active(component))
 722                         pinctrl_pm_select_sleep_state(component->dev);
 723
 724         return 0;
 725 }
 726
 727 /*
 728  * Called by ALSA when a PCM substream is closed. Private data can be
 729  * freed here. The cpu DAI, codec DAI, machine and components are also
 730  * shutdown.
 731  */
 732 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
 733                            struct snd_pcm_substream *substream)
 734 {
 735         return soc_pcm_clean(rtd, substream, 0);
 736 }
 737
 738 /* PCM close ops for non-DPCM streams */
 739 static int soc_pcm_close(struct snd_pcm_substream *substream)
 740 {
 741         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 742
 743         snd_soc_dpcm_mutex_lock(rtd);
 744         __soc_pcm_close(rtd, substream);
 745         snd_soc_dpcm_mutex_unlock(rtd);
 746         return 0;
 747 }
 748
 749 static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
 750 {
 751         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 752         struct snd_pcm_hardware *hw = &substream->runtime->hw;
 753         const char *name_cpu = soc_cpu_dai_name(rtd);
 754         const char *name_codec = soc_codec_dai_name(rtd);
 755         const char *err_msg;
 756         struct device *dev = rtd->dev;
 757
 758         err_msg = "rates";
 759         if (!hw->rates)
 760                 goto config_err;
 761
 762         err_msg = "formats";
 763         if (!hw->formats)
 764                 goto config_err;
 765
 766         err_msg = "channels";
 767         if (!hw->channels_min || !hw->channels_max ||
 768              hw->channels_min  >  hw->channels_max)
 769                 goto config_err;
 770
 771         dev_dbg(dev, "ASoC: %s <-> %s info:\n",         name_codec,
 772                                                         name_cpu);
 773         dev_dbg(dev, "ASoC: rate mask 0x%x\n",          hw->rates);
 774         dev_dbg(dev, "ASoC: ch   min %d max %d\n",      hw->channels_min,
 775                                                         hw->channels_max);
 776         dev_dbg(dev, "ASoC: rate min %d max %d\n",      hw->rate_min,
 777                                                         hw->rate_max);
 778
 779         return 0;
 780
 781 config_err:
 782         dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
 783                 name_codec, name_cpu, err_msg);
 784         return -EINVAL;
 785 }
 786
 787 /*
 788  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 789  * then initialized and any private data can be allocated. This also calls
 790  * startup for the cpu DAI, component, machine and codec DAI.
 791  */
 792 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
 793                           struct snd_pcm_substream *substream)
 794 {
 795         struct snd_soc_component *component;
 796         struct snd_soc_dai *dai;
 797         int i, ret = 0;
 798
 799         snd_soc_dpcm_mutex_assert_held(rtd);
 800
 801         for_each_rtd_components(rtd, i, component)
 802                 pinctrl_pm_select_default_state(component->dev);
 803
 804         ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
 805         if (ret < 0)
 806                 goto err;
 807
 808         ret = soc_pcm_components_open(substream);
 809         if (ret < 0)
 810                 goto err;
 811
 812         ret = snd_soc_link_startup(substream);
 813         if (ret < 0)
 814                 goto err;
 815
 816         /* startup the audio subsystem */
 817         for_each_rtd_dais(rtd, i, dai) {
 818                 ret = snd_soc_dai_startup(dai, substream);
 819                 if (ret < 0)
 820                         goto err;
 821         }
 822
 823         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 824         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 825                 goto dynamic;
 826
 827         /* Check that the codec and cpu DAIs are compatible */
 828         soc_pcm_init_runtime_hw(substream);
 829
 830         soc_pcm_update_symmetry(substream);
 831
 832         ret = soc_hw_sanity_check(substream);
 833         if (ret < 0)
 834                 goto err;
 835
 836         soc_pcm_apply_msb(substream);
 837
 838         /* Symmetry only applies if we've already got an active stream. */
 839         for_each_rtd_dais(rtd, i, dai) {
 840                 ret = soc_pcm_apply_symmetry(substream, dai);
 841                 if (ret != 0)
 842                         goto err;
 843         }
 844 dynamic:
 845         snd_soc_runtime_activate(rtd, substream->stream);
 846         ret = 0;
 847 err:
 848         if (ret < 0)
 849                 soc_pcm_clean(rtd, substream, 1);
 850
 851         return soc_pcm_ret(rtd, ret);
 852 }
 853
 854 /* PCM open ops for non-DPCM streams */
 855 static int soc_pcm_open(struct snd_pcm_substream *substream)
 856 {
 857         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 858         int ret;
 859
 860         snd_soc_dpcm_mutex_lock(rtd);
 861         ret = __soc_pcm_open(rtd, substream);
 862         snd_soc_dpcm_mutex_unlock(rtd);
 863         return ret;
 864 }
 865
 866 /*
 867  * Called by ALSA when the PCM substream is prepared, can set format, sample
 868  * rate, etc.  This function is non atomic and can be called multiple times,
 869  * it can refer to the runtime info.
 870  */
 871 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
 872                              struct snd_pcm_substream *substream)
 873 {
 874         struct snd_soc_dai *dai;
 875         int i, ret = 0;
 876
 877         snd_soc_dpcm_mutex_assert_held(rtd);
 878
 879         ret = snd_soc_link_prepare(substream);
 880         if (ret < 0)
 881                 goto out;
 882
 883         ret = snd_soc_pcm_component_prepare(substream);
 884         if (ret < 0)
 885                 goto out;
 886
 887         ret = snd_soc_pcm_dai_prepare(substream);
 888         if (ret < 0)
 889                 goto out;
 890
 891         /* cancel any delayed stream shutdown that is pending */
 892         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 893             rtd->pop_wait) {
 894                 rtd->pop_wait = 0;
 895                 cancel_delayed_work(&rtd->delayed_work);
 896         }
 897
 898         snd_soc_dapm_stream_event(rtd, substream->stream,
 899                         SND_SOC_DAPM_STREAM_START);
 900
 901         for_each_rtd_dais(rtd, i, dai)
 902                 snd_soc_dai_digital_mute(dai, 0, substream->stream);
 903
 904 out:
 905         return soc_pcm_ret(rtd, ret);
 906 }
 907
 908 /* PCM prepare ops for non-DPCM streams */
 909 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 910 {
 911         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 912         int ret;
 913
 914         snd_soc_dpcm_mutex_lock(rtd);
 915         ret = __soc_pcm_prepare(rtd, substream);
 916         snd_soc_dpcm_mutex_unlock(rtd);
 917         return ret;
 918 }
 919
 920 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 921                                        unsigned int mask)
 922 {
 923         struct snd_interval *interval;
 924         int channels = hweight_long(mask);
 925
 926         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 927         interval->min = channels;
 928         interval->max = channels;
 929 }
 930
 931 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
 932                             struct snd_pcm_substream *substream, int rollback)
 933 {
 934         struct snd_soc_dai *dai;
 935         int i;
 936
 937         snd_soc_dpcm_mutex_assert_held(rtd);
 938
 939         /* run the stream event */
 940         snd_soc_dapm_stream_stop(rtd, substream->stream);
 941
 942         /* free any machine hw params */
 943         snd_soc_link_hw_free(substream, rollback);
 944
 945         /* free any component resources */
 946         snd_soc_pcm_component_hw_free(substream, rollback);
 947
 948         /* now free hw params for the DAIs  */
 949         for_each_rtd_dais(rtd, i, dai)
 950                 if (snd_soc_dai_stream_valid(dai, substream->stream))
 951                         snd_soc_dai_hw_free(dai, substream, rollback);
 952
 953         return 0;
 954 }
 955
 956 /*
 957  * Frees resources allocated by hw_params, can be called multiple times
 958  */
 959 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
 960                              struct snd_pcm_substream *substream)
 961 {
 962         return soc_pcm_hw_clean(rtd, substream, 0);
 963 }
 964
 965 /* hw_free PCM ops for non-DPCM streams */
 966 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 967 {
 968         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 969         int ret;
 970
 971         snd_soc_dpcm_mutex_lock(rtd);
 972         ret = __soc_pcm_hw_free(rtd, substream);
 973         snd_soc_dpcm_mutex_unlock(rtd);
 974         return ret;
 975 }
 976
 977 /*
 978  * Called by ALSA when the hardware params are set by application. This
 979  * function can also be called multiple times and can allocate buffers
 980  * (using snd_pcm_lib_* ). It's non-atomic.
 981  */
 982 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
 983                                struct snd_pcm_substream *substream,
 984                                struct snd_pcm_hw_params *params)
 985 {
 986         struct snd_soc_dai *cpu_dai;
 987         struct snd_soc_dai *codec_dai;
 988         int i, ret = 0;
 989
 990         snd_soc_dpcm_mutex_assert_held(rtd);
 991
 992         ret = soc_pcm_params_symmetry(substream, params);
 993         if (ret)
 994                 goto out;
 995
 996         ret = snd_soc_link_hw_params(substream, params);
 997         if (ret < 0)
 998                 goto out;
 999
1000         for_each_rtd_codec_dais(rtd, i, codec_dai) {
1001                 struct snd_pcm_hw_params codec_params;
1002                 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream);
1003
1004                 /*
1005                  * Skip CODECs which don't support the current stream type,
1006                  * the idea being that if a CODEC is not used for the currently
1007                  * set up transfer direction, it should not need to be
1008                  * configured, especially since the configuration used might
1009                  * not even be supported by that CODEC. There may be cases
1010                  * however where a CODEC needs to be set up although it is
1011                  * actually not being used for the transfer, e.g. if a
1012                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
1013                  * for the DAI link including a playback-only CODEC.
1014                  * If this becomes necessary, we will have to augment the
1015                  * machine driver setup with information on how to act, so
1016                  * we can do the right thing here.
1017                  */
1018                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1019                         continue;
1020
1021                 /* copy params for each codec */
1022                 codec_params = *params;
1023
1024                 /* fixup params based on TDM slot masks */
1025                 if (tdm_mask)
1026                         soc_pcm_codec_params_fixup(&codec_params, tdm_mask);
1027
1028                 ret = snd_soc_dai_hw_params(codec_dai, substream,
1029                                             &codec_params);
1030                 if(ret < 0)
1031                         goto out;
1032
1033                 soc_pcm_set_dai_params(codec_dai, &codec_params);
1034                 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
1035         }
1036
1037         for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1038                 struct snd_pcm_hw_params cpu_params;
1039                 unsigned int ch_mask = 0;
1040                 int j;
1041
1042                 /*
1043                  * Skip CPUs which don't support the current stream
1044                  * type. See soc_pcm_init_runtime_hw() for more details
1045                  */
1046                 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1047                         continue;
1048
1049                 /* copy params for each cpu */
1050                 cpu_params = *params;
1051
1052                 if (!rtd->dai_link->codec_ch_maps)
1053                         goto hw_params;
1054                 /*
1055                  * construct cpu channel mask by combining ch_mask of each
1056                  * codec which maps to the cpu.
1057                  */
1058                 for_each_rtd_codec_dais(rtd, j, codec_dai) {
1059                         if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i)
1060                                 ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask;
1061                 }
1062
1063                 /* fixup cpu channel number */
1064                 if (ch_mask)
1065                         soc_pcm_codec_params_fixup(&cpu_params, ch_mask);
1066
1067 hw_params:
1068                 ret = snd_soc_dai_hw_params(cpu_dai, substream, &cpu_params);
1069                 if (ret < 0)
1070                         goto out;
1071
1072                 /* store the parameters for each DAI */
1073                 soc_pcm_set_dai_params(cpu_dai, &cpu_params);
1074                 snd_soc_dapm_update_dai(substream, &cpu_params, cpu_dai);
1075         }
1076
1077         ret = snd_soc_pcm_component_hw_params(substream, params);
1078 out:
1079         if (ret < 0)
1080                 soc_pcm_hw_clean(rtd, substream, 1);
1081
1082         return soc_pcm_ret(rtd, ret);
1083 }
1084
1085 /* hw_params PCM ops for non-DPCM streams */
1086 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1087                              struct snd_pcm_hw_params *params)
1088 {
1089         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1090         int ret;
1091
1092         snd_soc_dpcm_mutex_lock(rtd);
1093         ret = __soc_pcm_hw_params(rtd, substream, params);
1094         snd_soc_dpcm_mutex_unlock(rtd);
1095         return ret;
1096 }
1097
1098 #define TRIGGER_MAX 3
1099 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = {
1100         [SND_SOC_TRIGGER_ORDER_DEFAULT] = {
1101                 snd_soc_link_trigger,
1102                 snd_soc_pcm_component_trigger,
1103                 snd_soc_pcm_dai_trigger,
1104         },
1105         [SND_SOC_TRIGGER_ORDER_LDC] = {
1106                 snd_soc_link_trigger,
1107                 snd_soc_pcm_dai_trigger,
1108                 snd_soc_pcm_component_trigger,
1109         },
1110 };
1111
1112 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1113 {
1114         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1115         struct snd_soc_component *component;
1116         int ret = 0, r = 0, i;
1117         int rollback = 0;
1118         int start = 0, stop = 0;
1119
1120         /*
1121          * select START/STOP sequence
1122          */
1123         for_each_rtd_components(rtd, i, component) {
1124                 if (component->driver->trigger_start)
1125                         start = component->driver->trigger_start;
1126                 if (component->driver->trigger_stop)
1127                         stop = component->driver->trigger_stop;
1128         }
1129         if (rtd->dai_link->trigger_start)
1130                 start = rtd->dai_link->trigger_start;
1131         if (rtd->dai_link->trigger_stop)
1132                 stop  = rtd->dai_link->trigger_stop;
1133
1134         if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX ||
1135             stop  < 0 || stop  >= SND_SOC_TRIGGER_ORDER_MAX)
1136                 return -EINVAL;
1137
1138         /*
1139          * START
1140          */
1141         switch (cmd) {
1142         case SNDRV_PCM_TRIGGER_START:
1143         case SNDRV_PCM_TRIGGER_RESUME:
1144         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1145                 for (i = 0; i < TRIGGER_MAX; i++) {
1146                         r = trigger[start][i](substream, cmd, 0);
1147                         if (r < 0)
1148                                 break;
1149                 }
1150         }
1151
1152         /*
1153          * Rollback if START failed
1154          * find correspond STOP command
1155          */
1156         if (r < 0) {
1157                 rollback = 1;
1158                 ret = r;
1159                 switch (cmd) {
1160                 case SNDRV_PCM_TRIGGER_START:
1161                         cmd = SNDRV_PCM_TRIGGER_STOP;
1162                         break;
1163                 case SNDRV_PCM_TRIGGER_RESUME:
1164                         cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1165                         break;
1166                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1167                         cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1168                         break;
1169                 }
1170         }
1171
1172         /*
1173          * STOP
1174          */
1175         switch (cmd) {
1176         case SNDRV_PCM_TRIGGER_STOP:
1177         case SNDRV_PCM_TRIGGER_SUSPEND:
1178         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1179                 for (i = TRIGGER_MAX; i > 0; i--) {
1180                         r = trigger[stop][i - 1](substream, cmd, rollback);
1181                         if (r < 0)
1182                                 ret = r;
1183                 }
1184         }
1185
1186         return ret;
1187 }
1188
1189 /*
1190  * soc level wrapper for pointer callback
1191  * If cpu_dai, codec_dai, component driver has the delay callback, then
1192  * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
1193  */
1194 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1195 {
1196         struct snd_pcm_runtime *runtime = substream->runtime;
1197         snd_pcm_uframes_t offset = 0;
1198         snd_pcm_sframes_t codec_delay = 0;
1199         snd_pcm_sframes_t cpu_delay = 0;
1200
1201         offset = snd_soc_pcm_component_pointer(substream);
1202
1203         /* should be called *after* snd_soc_pcm_component_pointer() */
1204         snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
1205         snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
1206
1207         runtime->delay = cpu_delay + codec_delay;
1208
1209         return offset;
1210 }
1211
1212 /* connect a FE and BE */
1213 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1214                 struct snd_soc_pcm_runtime *be, int stream)
1215 {
1216         struct snd_pcm_substream *fe_substream;
1217         struct snd_pcm_substream *be_substream;
1218         struct snd_soc_dpcm *dpcm;
1219
1220         snd_soc_dpcm_mutex_assert_held(fe);
1221
1222         /* only add new dpcms */
1223         for_each_dpcm_be(fe, stream, dpcm) {
1224                 if (dpcm->be == be && dpcm->fe == fe)
1225                         return 0;
1226         }
1227
1228         fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1229         be_substream = snd_soc_dpcm_get_substream(be, stream);
1230
1231         if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1232                 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1233                         __func__);
1234                 return -EINVAL;
1235         }
1236         if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
1237                 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
1238                 be_substream->pcm->nonatomic = 1;
1239         }
1240
1241         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1242         if (!dpcm)
1243                 return -ENOMEM;
1244
1245         dpcm->be = be;
1246         dpcm->fe = fe;
1247         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1248         snd_soc_dpcm_stream_lock_irq(fe, stream);
1249         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1250         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1251         snd_soc_dpcm_stream_unlock_irq(fe, stream);
1252
1253         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1254                         stream ? "capture" : "playback",  fe->dai_link->name,
1255                         stream ? "<-" : "->", be->dai_link->name);
1256
1257         dpcm_create_debugfs_state(dpcm, stream);
1258
1259         return 1;
1260 }
1261
1262 /* reparent a BE onto another FE */
1263 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1264                         struct snd_soc_pcm_runtime *be, int stream)
1265 {
1266         struct snd_soc_dpcm *dpcm;
1267         struct snd_pcm_substream *fe_substream, *be_substream;
1268
1269         /* reparent if BE is connected to other FEs */
1270         if (!be->dpcm[stream].users)
1271                 return;
1272
1273         be_substream = snd_soc_dpcm_get_substream(be, stream);
1274         if (!be_substream)
1275                 return;
1276
1277         for_each_dpcm_fe(be, stream, dpcm) {
1278                 if (dpcm->fe == fe)
1279                         continue;
1280
1281                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1282                         stream ? "capture" : "playback",
1283                         dpcm->fe->dai_link->name,
1284                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1285
1286                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1287                 be_substream->runtime = fe_substream->runtime;
1288                 break;
1289         }
1290 }
1291
1292 /* disconnect a BE and FE */
1293 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1294 {
1295         struct snd_soc_dpcm *dpcm, *d;
1296         LIST_HEAD(deleted_dpcms);
1297
1298         snd_soc_dpcm_mutex_assert_held(fe);
1299
1300         snd_soc_dpcm_stream_lock_irq(fe, stream);
1301         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1302                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1303                                 stream ? "capture" : "playback",
1304                                 dpcm->be->dai_link->name);
1305
1306                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1307                         continue;
1308
1309                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1310                         stream ? "capture" : "playback", fe->dai_link->name,
1311                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1312
1313                 /* BEs still alive need new FE */
1314                 dpcm_be_reparent(fe, dpcm->be, stream);
1315
1316                 list_del(&dpcm->list_be);
1317                 list_move(&dpcm->list_fe, &deleted_dpcms);
1318         }
1319         snd_soc_dpcm_stream_unlock_irq(fe, stream);
1320
1321         while (!list_empty(&deleted_dpcms)) {
1322                 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1323                                         list_fe);
1324                 list_del(&dpcm->list_fe);
1325                 dpcm_remove_debugfs_state(dpcm);
1326                 kfree(dpcm);
1327         }
1328 }
1329
1330 /* get BE for DAI widget and stream */
1331 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1332                 struct snd_soc_dapm_widget *widget, int stream)
1333 {
1334         struct snd_soc_pcm_runtime *be;
1335         struct snd_soc_dapm_widget *w;
1336         struct snd_soc_dai *dai;
1337         int i;
1338
1339         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1340
1341         for_each_card_rtds(card, be) {
1342
1343                 if (!be->dai_link->no_pcm)
1344                         continue;
1345
1346                 if (!snd_soc_dpcm_get_substream(be, stream))
1347                         continue;
1348
1349                 for_each_rtd_dais(be, i, dai) {
1350                         w = snd_soc_dai_get_widget(dai, stream);
1351
1352                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1353                                 w ? w->name : "(not set)");
1354
1355                         if (w == widget)
1356                                 return be;
1357                 }
1358         }
1359
1360         /* Widget provided is not a BE */
1361         return NULL;
1362 }
1363
1364 int widget_in_list(struct snd_soc_dapm_widget_list *list,
1365                 struct snd_soc_dapm_widget *widget)
1366 {
1367         struct snd_soc_dapm_widget *w;
1368         int i;
1369
1370         for_each_dapm_widgets(list, i, w)
1371                 if (widget == w)
1372                         return 1;
1373
1374         return 0;
1375 }
1376 EXPORT_SYMBOL_GPL(widget_in_list);
1377
1378 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
1379 {
1380         struct snd_soc_card *card = widget->dapm->card;
1381         struct snd_soc_pcm_runtime *rtd;
1382         int stream;
1383
1384         /* adjust dir to stream */
1385         if (dir == SND_SOC_DAPM_DIR_OUT)
1386                 stream = SNDRV_PCM_STREAM_PLAYBACK;
1387         else
1388                 stream = SNDRV_PCM_STREAM_CAPTURE;
1389
1390         rtd = dpcm_get_be(card, widget, stream);
1391         if (rtd)
1392                 return true;
1393
1394         return false;
1395 }
1396 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
1397
1398 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1399         int stream, struct snd_soc_dapm_widget_list **list)
1400 {
1401         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
1402         int paths;
1403
1404         if (fe->dai_link->num_cpus > 1) {
1405                 dev_err(fe->dev,
1406                         "%s doesn't support Multi CPU yet\n", __func__);
1407                 return -EINVAL;
1408         }
1409
1410         /* get number of valid DAI paths and their widgets */
1411         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1412                         fe->card->component_chaining ?
1413                                 NULL : dpcm_end_walk_at_be);
1414
1415         if (paths > 0)
1416                 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1417                         stream ? "capture" : "playback");
1418         else if (paths == 0)
1419                 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1420                          stream ? "capture" : "playback");
1421
1422         return paths;
1423 }
1424
1425 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1426 {
1427         snd_soc_dapm_dai_free_widgets(list);
1428 }
1429
1430 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1431                               struct snd_soc_dapm_widget_list *list)
1432 {
1433         struct snd_soc_dai *dai;
1434         unsigned int i;
1435
1436         /* is there a valid DAI widget for this BE */
1437         for_each_rtd_dais(dpcm->be, i, dai) {
1438                 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
1439
1440                 /*
1441                  * The BE is pruned only if none of the dai
1442                  * widgets are in the active list.
1443                  */
1444                 if (widget && widget_in_list(list, widget))
1445                         return true;
1446         }
1447
1448         return false;
1449 }
1450
1451 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1452                             struct snd_soc_dapm_widget_list **list_)
1453 {
1454         struct snd_soc_dpcm *dpcm;
1455         int prune = 0;
1456
1457         /* Destroy any old FE <--> BE connections */
1458         for_each_dpcm_be(fe, stream, dpcm) {
1459                 if (dpcm_be_is_active(dpcm, stream, *list_))
1460                         continue;
1461
1462                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1463                         stream ? "capture" : "playback",
1464                         dpcm->be->dai_link->name, fe->dai_link->name);
1465                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1466                 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1467                 prune++;
1468         }
1469
1470         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1471         return prune;
1472 }
1473
1474 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1475         struct snd_soc_dapm_widget_list **list_)
1476 {
1477         struct snd_soc_card *card = fe->card;
1478         struct snd_soc_dapm_widget_list *list = *list_;
1479         struct snd_soc_pcm_runtime *be;
1480         struct snd_soc_dapm_widget *widget;
1481         struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1482         int i, new = 0, err;
1483
1484         /* don't connect if FE is not running */
1485         if (!fe_substream->runtime && !fe->fe_compr)
1486                 return new;
1487
1488         /* Create any new FE <--> BE connections */
1489         for_each_dapm_widgets(list, i, widget) {
1490
1491                 switch (widget->id) {
1492                 case snd_soc_dapm_dai_in:
1493                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1494                                 continue;
1495                         break;
1496                 case snd_soc_dapm_dai_out:
1497                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1498                                 continue;
1499                         break;
1500                 default:
1501                         continue;
1502                 }
1503
1504                 /* is there a valid BE rtd for this widget */
1505                 be = dpcm_get_be(card, widget, stream);
1506                 if (!be) {
1507                         dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1508                                 widget->name);
1509                         continue;
1510                 }
1511
1512                 /*
1513                  * Filter for systems with 'component_chaining' enabled.
1514                  * This helps to avoid unnecessary re-configuration of an
1515                  * already active BE on such systems.
1516                  */
1517                 if (fe->card->component_chaining &&
1518                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1519                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1520                         continue;
1521
1522                 /* newly connected FE and BE */
1523                 err = dpcm_be_connect(fe, be, stream);
1524                 if (err < 0) {
1525                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1526                                 widget->name);
1527                         break;
1528                 } else if (err == 0) /* already connected */
1529                         continue;
1530
1531                 /* new */
1532                 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1533                 new++;
1534         }
1535
1536         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1537         return new;
1538 }
1539
1540 /*
1541  * Find the corresponding BE DAIs that source or sink audio to this
1542  * FE substream.
1543  */
1544 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1545         int stream, struct snd_soc_dapm_widget_list **list, int new)
1546 {
1547         if (new)
1548                 return dpcm_add_paths(fe, stream, list);
1549         else
1550                 return dpcm_prune_paths(fe, stream, list);
1551 }
1552
1553 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1554 {
1555         struct snd_soc_dpcm *dpcm;
1556
1557         for_each_dpcm_be(fe, stream, dpcm)
1558                 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1559 }
1560
1561 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1562                       int do_hw_free, struct snd_soc_dpcm *last)
1563 {
1564         struct snd_soc_dpcm *dpcm;
1565
1566         /* disable any enabled and non active backends */
1567         for_each_dpcm_be(fe, stream, dpcm) {
1568                 struct snd_soc_pcm_runtime *be = dpcm->be;
1569                 struct snd_pcm_substream *be_substream =
1570                         snd_soc_dpcm_get_substream(be, stream);
1571
1572                 if (dpcm == last)
1573                         return;
1574
1575                 /* is this op for this BE ? */
1576                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1577                         continue;
1578
1579                 if (be->dpcm[stream].users == 0) {
1580                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1581                                 stream ? "capture" : "playback",
1582                                 be->dpcm[stream].state);
1583                         continue;
1584                 }
1585
1586                 if (--be->dpcm[stream].users != 0)
1587                         continue;
1588
1589                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1590                         if (!do_hw_free)
1591                                 continue;
1592
1593                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1594                                 __soc_pcm_hw_free(be, be_substream);
1595                                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1596                         }
1597                 }
1598
1599                 __soc_pcm_close(be, be_substream);
1600                 be_substream->runtime = NULL;
1601                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1602         }
1603 }
1604
1605 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1606 {
1607         struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1608         struct snd_soc_pcm_runtime *be;
1609         struct snd_soc_dpcm *dpcm;
1610         int err, count = 0;
1611
1612         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1613         for_each_dpcm_be(fe, stream, dpcm) {
1614                 struct snd_pcm_substream *be_substream;
1615
1616                 be = dpcm->be;
1617                 be_substream = snd_soc_dpcm_get_substream(be, stream);
1618
1619                 if (!be_substream) {
1620                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1621                                 stream ? "capture" : "playback");
1622                         continue;
1623                 }
1624
1625                 /* is this op for this BE ? */
1626                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1627                         continue;
1628
1629                 /* first time the dpcm is open ? */
1630                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
1631                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1632                                 stream ? "capture" : "playback",
1633                                 be->dpcm[stream].state);
1634                         continue;
1635                 }
1636
1637                 if (be->dpcm[stream].users++ != 0)
1638                         continue;
1639
1640                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1641                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1642                         continue;
1643
1644                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1645                         stream ? "capture" : "playback", be->dai_link->name);
1646
1647                 be_substream->runtime = fe_substream->runtime;
1648                 err = __soc_pcm_open(be, be_substream);
1649                 if (err < 0) {
1650                         be->dpcm[stream].users--;
1651                         if (be->dpcm[stream].users < 0)
1652                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1653                                         stream ? "capture" : "playback",
1654                                         be->dpcm[stream].state);
1655
1656                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1657                         goto unwind;
1658                 }
1659                 be->dpcm[stream].be_start = 0;
1660                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1661                 count++;
1662         }
1663
1664         return count;
1665
1666 unwind:
1667         dpcm_be_dai_startup_rollback(fe, stream, dpcm);
1668
1669         return soc_pcm_ret(fe, err);
1670 }
1671
1672 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1673 {
1674         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1675         struct snd_pcm_runtime *runtime = substream->runtime;
1676         struct snd_pcm_hardware *hw = &runtime->hw;
1677         struct snd_soc_dai *dai;
1678         int stream = substream->stream;
1679         u64 formats = hw->formats;
1680         int i;
1681
1682         soc_pcm_hw_init(hw);
1683
1684         if (formats)
1685                 hw->formats &= formats;
1686
1687         for_each_rtd_cpu_dais(fe, i, dai) {
1688                 struct snd_soc_pcm_stream *cpu_stream;
1689
1690                 /*
1691                  * Skip CPUs which don't support the current stream
1692                  * type. See soc_pcm_init_runtime_hw() for more details
1693                  */
1694                 if (!snd_soc_dai_stream_valid(dai, stream))
1695                         continue;
1696
1697                 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1698
1699                 soc_pcm_hw_update_rate(hw, cpu_stream);
1700                 soc_pcm_hw_update_chan(hw, cpu_stream);
1701                 soc_pcm_hw_update_format(hw, cpu_stream);
1702         }
1703
1704 }
1705
1706 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1707 {
1708         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1709         struct snd_pcm_runtime *runtime = substream->runtime;
1710         struct snd_pcm_hardware *hw = &runtime->hw;
1711         struct snd_soc_dpcm *dpcm;
1712         struct snd_soc_dai *dai;
1713         int stream = substream->stream;
1714
1715         if (!fe->dai_link->dpcm_merged_format)
1716                 return;
1717
1718         /*
1719          * It returns merged BE codec format
1720          * if FE want to use it (= dpcm_merged_format)
1721          */
1722
1723         for_each_dpcm_be(fe, stream, dpcm) {
1724                 struct snd_soc_pcm_runtime *be = dpcm->be;
1725                 struct snd_soc_pcm_stream *codec_stream;
1726                 int i;
1727
1728                 for_each_rtd_codec_dais(be, i, dai) {
1729                         /*
1730                          * Skip CODECs which don't support the current stream
1731                          * type. See soc_pcm_init_runtime_hw() for more details
1732                          */
1733                         if (!snd_soc_dai_stream_valid(dai, stream))
1734                                 continue;
1735
1736                         codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1737
1738                         soc_pcm_hw_update_format(hw, codec_stream);
1739                 }
1740         }
1741 }
1742
1743 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1744 {
1745         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1746         struct snd_pcm_runtime *runtime = substream->runtime;
1747         struct snd_pcm_hardware *hw = &runtime->hw;
1748         struct snd_soc_dpcm *dpcm;
1749         int stream = substream->stream;
1750
1751         if (!fe->dai_link->dpcm_merged_chan)
1752                 return;
1753
1754         /*
1755          * It returns merged BE codec channel;
1756          * if FE want to use it (= dpcm_merged_chan)
1757          */
1758
1759         for_each_dpcm_be(fe, stream, dpcm) {
1760                 struct snd_soc_pcm_runtime *be = dpcm->be;
1761                 struct snd_soc_pcm_stream *cpu_stream;
1762                 struct snd_soc_dai *dai;
1763                 int i;
1764
1765                 for_each_rtd_cpu_dais(be, i, dai) {
1766                         /*
1767                          * Skip CPUs which don't support the current stream
1768                          * type. See soc_pcm_init_runtime_hw() for more details
1769                          */
1770                         if (!snd_soc_dai_stream_valid(dai, stream))
1771                                 continue;
1772
1773                         cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1774
1775                         soc_pcm_hw_update_chan(hw, cpu_stream);
1776                 }
1777
1778                 /*
1779                  * chan min/max cannot be enforced if there are multiple CODEC
1780                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1781                  */
1782                 if (be->dai_link->num_codecs == 1) {
1783                         struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1784                                 asoc_rtd_to_codec(be, 0), stream);
1785
1786                         soc_pcm_hw_update_chan(hw, codec_stream);
1787                 }
1788         }
1789 }
1790
1791 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1792 {
1793         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1794         struct snd_pcm_runtime *runtime = substream->runtime;
1795         struct snd_pcm_hardware *hw = &runtime->hw;
1796         struct snd_soc_dpcm *dpcm;
1797         int stream = substream->stream;
1798
1799         if (!fe->dai_link->dpcm_merged_rate)
1800                 return;
1801
1802         /*
1803          * It returns merged BE codec channel;
1804          * if FE want to use it (= dpcm_merged_chan)
1805          */
1806
1807         for_each_dpcm_be(fe, stream, dpcm) {
1808                 struct snd_soc_pcm_runtime *be = dpcm->be;
1809                 struct snd_soc_pcm_stream *pcm;
1810                 struct snd_soc_dai *dai;
1811                 int i;
1812
1813                 for_each_rtd_dais(be, i, dai) {
1814                         /*
1815                          * Skip DAIs which don't support the current stream
1816                          * type. See soc_pcm_init_runtime_hw() for more details
1817                          */
1818                         if (!snd_soc_dai_stream_valid(dai, stream))
1819                                 continue;
1820
1821                         pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1822
1823                         soc_pcm_hw_update_rate(hw, pcm);
1824                 }
1825         }
1826 }
1827
1828 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1829                                int stream)
1830 {
1831         struct snd_soc_dpcm *dpcm;
1832         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1833         struct snd_soc_dai *fe_cpu_dai;
1834         int err = 0;
1835         int i;
1836
1837         /* apply symmetry for FE */
1838         soc_pcm_update_symmetry(fe_substream);
1839
1840         for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1841                 /* Symmetry only applies if we've got an active stream. */
1842                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1843                 if (err < 0)
1844                         goto error;
1845         }
1846
1847         /* apply symmetry for BE */
1848         for_each_dpcm_be(fe, stream, dpcm) {
1849                 struct snd_soc_pcm_runtime *be = dpcm->be;
1850                 struct snd_pcm_substream *be_substream =
1851                         snd_soc_dpcm_get_substream(be, stream);
1852                 struct snd_soc_pcm_runtime *rtd;
1853                 struct snd_soc_dai *dai;
1854
1855                 /* A backend may not have the requested substream */
1856                 if (!be_substream)
1857                         continue;
1858
1859                 rtd = asoc_substream_to_rtd(be_substream);
1860                 if (rtd->dai_link->be_hw_params_fixup)
1861                         continue;
1862
1863                 soc_pcm_update_symmetry(be_substream);
1864
1865                 /* Symmetry only applies if we've got an active stream. */
1866                 for_each_rtd_dais(rtd, i, dai) {
1867                         err = soc_pcm_apply_symmetry(fe_substream, dai);
1868                         if (err < 0)
1869                                 goto error;
1870                 }
1871         }
1872 error:
1873         return soc_pcm_ret(fe, err);
1874 }
1875
1876 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1877 {
1878         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1879         int stream = fe_substream->stream, ret = 0;
1880
1881         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1882
1883         ret = dpcm_be_dai_startup(fe, stream);
1884         if (ret < 0)
1885                 goto be_err;
1886
1887         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1888
1889         /* start the DAI frontend */
1890         ret = __soc_pcm_open(fe, fe_substream);
1891         if (ret < 0)
1892                 goto unwind;
1893
1894         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1895
1896         dpcm_runtime_setup_fe(fe_substream);
1897
1898         dpcm_runtime_setup_be_format(fe_substream);
1899         dpcm_runtime_setup_be_chan(fe_substream);
1900         dpcm_runtime_setup_be_rate(fe_substream);
1901
1902         ret = dpcm_apply_symmetry(fe_substream, stream);
1903
1904 unwind:
1905         if (ret < 0)
1906                 dpcm_be_dai_startup_unwind(fe, stream);
1907 be_err:
1908         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1909
1910         return soc_pcm_ret(fe, ret);
1911 }
1912
1913 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1914 {
1915         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1916         int stream = substream->stream;
1917
1918         snd_soc_dpcm_mutex_assert_held(fe);
1919
1920         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1921
1922         /* shutdown the BEs */
1923         dpcm_be_dai_shutdown(fe, stream);
1924
1925         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1926
1927         /* now shutdown the frontend */
1928         __soc_pcm_close(fe, substream);
1929
1930         /* run the stream stop event */
1931         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1932
1933         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1934         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1935         return 0;
1936 }
1937
1938 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1939 {
1940         struct snd_soc_dpcm *dpcm;
1941
1942         /* only hw_params backends that are either sinks or sources
1943          * to this frontend DAI */
1944         for_each_dpcm_be(fe, stream, dpcm) {
1945
1946                 struct snd_soc_pcm_runtime *be = dpcm->be;
1947                 struct snd_pcm_substream *be_substream =
1948                         snd_soc_dpcm_get_substream(be, stream);
1949
1950                 /* is this op for this BE ? */
1951                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1952                         continue;
1953
1954                 /* only free hw when no longer used - check all FEs */
1955                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1956                                 continue;
1957
1958                 /* do not free hw if this BE is used by other FE */
1959                 if (be->dpcm[stream].users > 1)
1960                         continue;
1961
1962                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1963                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1964                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1965                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1966                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1967                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1968                         continue;
1969
1970                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1971                         be->dai_link->name);
1972
1973                 __soc_pcm_hw_free(be, be_substream);
1974
1975                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1976         }
1977 }
1978
1979 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1980 {
1981         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1982         int stream = substream->stream;
1983
1984         snd_soc_dpcm_mutex_lock(fe);
1985         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1986
1987         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1988
1989         /* call hw_free on the frontend */
1990         soc_pcm_hw_clean(fe, substream, 0);
1991
1992         /* only hw_params backends that are either sinks or sources
1993          * to this frontend DAI */
1994         dpcm_be_dai_hw_free(fe, stream);
1995
1996         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1997         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1998
1999         snd_soc_dpcm_mutex_unlock(fe);
2000         return 0;
2001 }
2002
2003 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2004 {
2005         struct snd_soc_pcm_runtime *be;
2006         struct snd_pcm_substream *be_substream;
2007         struct snd_soc_dpcm *dpcm;
2008         int ret;
2009
2010         for_each_dpcm_be(fe, stream, dpcm) {
2011                 struct snd_pcm_hw_params hw_params;
2012
2013                 be = dpcm->be;
2014                 be_substream = snd_soc_dpcm_get_substream(be, stream);
2015
2016                 /* is this op for this BE ? */
2017                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2018                         continue;
2019
2020                 /* copy params for each dpcm */
2021                 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
2022                                 sizeof(struct snd_pcm_hw_params));
2023
2024                 /* perform any hw_params fixups */
2025                 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
2026                 if (ret < 0)
2027                         goto unwind;
2028
2029                 /* copy the fixed-up hw params for BE dai */
2030                 memcpy(&be->dpcm[stream].hw_params, &hw_params,
2031                        sizeof(struct snd_pcm_hw_params));
2032
2033                 /* only allow hw_params() if no connected FEs are running */
2034                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2035                         continue;
2036
2037                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2038                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2039                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2040                         continue;
2041
2042                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2043                         be->dai_link->name);
2044
2045                 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
2046                 if (ret < 0)
2047                         goto unwind;
2048
2049                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2050         }
2051         return 0;
2052
2053 unwind:
2054         dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2055                 __func__, be->dai_link->name, ret);
2056
2057         /* disable any enabled and non active backends */
2058         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2059                 be = dpcm->be;
2060                 be_substream = snd_soc_dpcm_get_substream(be, stream);
2061
2062                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2063                         continue;
2064
2065                 /* only allow hw_free() if no connected FEs are running */
2066                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2067                         continue;
2068
2069                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2070                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2071                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2072                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2073                         continue;
2074
2075                 __soc_pcm_hw_free(be, be_substream);
2076         }
2077
2078         return ret;
2079 }
2080
2081 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2082                                  struct snd_pcm_hw_params *params)
2083 {
2084         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2085         int ret, stream = substream->stream;
2086
2087         snd_soc_dpcm_mutex_lock(fe);
2088         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2089
2090         memcpy(&fe->dpcm[stream].hw_params, params,
2091                         sizeof(struct snd_pcm_hw_params));
2092         ret = dpcm_be_dai_hw_params(fe, stream);
2093         if (ret < 0)
2094                 goto out;
2095
2096         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2097                         fe->dai_link->name, params_rate(params),
2098                         params_channels(params), params_format(params));
2099
2100         /* call hw_params on the frontend */
2101         ret = __soc_pcm_hw_params(fe, substream, params);
2102         if (ret < 0)
2103                 dpcm_be_dai_hw_free(fe, stream);
2104         else
2105                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2106
2107 out:
2108         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2109         snd_soc_dpcm_mutex_unlock(fe);
2110
2111         return soc_pcm_ret(fe, ret);
2112 }
2113
2114 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2115                                int cmd)
2116 {
2117         struct snd_soc_pcm_runtime *be;
2118         bool pause_stop_transition;
2119         struct snd_soc_dpcm *dpcm;
2120         unsigned long flags;
2121         int ret = 0;
2122
2123         for_each_dpcm_be(fe, stream, dpcm) {
2124                 struct snd_pcm_substream *be_substream;
2125
2126                 be = dpcm->be;
2127                 be_substream = snd_soc_dpcm_get_substream(be, stream);
2128
2129                 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
2130
2131                 /* is this op for this BE ? */
2132                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2133                         goto next;
2134
2135                 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2136                         be->dai_link->name, cmd);
2137
2138                 switch (cmd) {
2139                 case SNDRV_PCM_TRIGGER_START:
2140                         if (!be->dpcm[stream].be_start &&
2141                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2142                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2143                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2144                                 goto next;
2145
2146                         be->dpcm[stream].be_start++;
2147                         if (be->dpcm[stream].be_start != 1)
2148                                 goto next;
2149
2150                         if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2151                                 ret = soc_pcm_trigger(be_substream,
2152                                                       SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2153                         else
2154                                 ret = soc_pcm_trigger(be_substream,
2155                                                       SNDRV_PCM_TRIGGER_START);
2156                         if (ret) {
2157                                 be->dpcm[stream].be_start--;
2158                                 goto next;
2159                         }
2160
2161                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2162                         break;
2163                 case SNDRV_PCM_TRIGGER_RESUME:
2164                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2165                                 goto next;
2166
2167                         be->dpcm[stream].be_start++;
2168                         if (be->dpcm[stream].be_start != 1)
2169                                 goto next;
2170
2171                         ret = soc_pcm_trigger(be_substream, cmd);
2172                         if (ret) {
2173                                 be->dpcm[stream].be_start--;
2174                                 goto next;
2175                         }
2176
2177                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2178                         break;
2179                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2180                         if (!be->dpcm[stream].be_start &&
2181                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2182                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2183                                 goto next;
2184
2185                         fe->dpcm[stream].fe_pause = false;
2186                         be->dpcm[stream].be_pause--;
2187
2188                         be->dpcm[stream].be_start++;
2189                         if (be->dpcm[stream].be_start != 1)
2190                                 goto next;
2191
2192                         ret = soc_pcm_trigger(be_substream, cmd);
2193                         if (ret) {
2194                                 be->dpcm[stream].be_start--;
2195                                 goto next;
2196                         }
2197
2198                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2199                         break;
2200                 case SNDRV_PCM_TRIGGER_STOP:
2201                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2202                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2203                                 goto next;
2204
2205                         if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2206                                 be->dpcm[stream].be_start--;
2207
2208                         if (be->dpcm[stream].be_start != 0)
2209                                 goto next;
2210
2211                         pause_stop_transition = false;
2212                         if (fe->dpcm[stream].fe_pause) {
2213                                 pause_stop_transition = true;
2214                                 fe->dpcm[stream].fe_pause = false;
2215                                 be->dpcm[stream].be_pause--;
2216                         }
2217
2218                         if (be->dpcm[stream].be_pause != 0)
2219                                 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2220                         else
2221                                 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2222
2223                         if (ret) {
2224                                 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2225                                         be->dpcm[stream].be_start++;
2226                                 if (pause_stop_transition) {
2227                                         fe->dpcm[stream].fe_pause = true;
2228                                         be->dpcm[stream].be_pause++;
2229                                 }
2230                                 goto next;
2231                         }
2232
2233                         if (be->dpcm[stream].be_pause != 0)
2234                                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2235                         else
2236                                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2237
2238                         break;
2239                 case SNDRV_PCM_TRIGGER_SUSPEND:
2240                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2241                                 goto next;
2242
2243                         be->dpcm[stream].be_start--;
2244                         if (be->dpcm[stream].be_start != 0)
2245                                 goto next;
2246
2247                         ret = soc_pcm_trigger(be_substream, cmd);
2248                         if (ret) {
2249                                 be->dpcm[stream].be_start++;
2250                                 goto next;
2251                         }
2252
2253                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2254                         break;
2255                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2256                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2257                                 goto next;
2258
2259                         fe->dpcm[stream].fe_pause = true;
2260                         be->dpcm[stream].be_pause++;
2261
2262                         be->dpcm[stream].be_start--;
2263                         if (be->dpcm[stream].be_start != 0)
2264                                 goto next;
2265
2266                         ret = soc_pcm_trigger(be_substream, cmd);
2267                         if (ret) {
2268                                 be->dpcm[stream].be_start++;
2269                                 goto next;
2270                         }
2271
2272                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2273                         break;
2274                 }
2275 next:
2276                 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2277                 if (ret)
2278                         break;
2279         }
2280         return soc_pcm_ret(fe, ret);
2281 }
2282 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2283
2284 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2285                                   int cmd, bool fe_first)
2286 {
2287         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2288         int ret;
2289
2290         /* call trigger on the frontend before the backend. */
2291         if (fe_first) {
2292                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2293                         fe->dai_link->name, cmd);
2294
2295                 ret = soc_pcm_trigger(substream, cmd);
2296                 if (ret < 0)
2297                         return ret;
2298
2299                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2300                 return ret;
2301         }
2302
2303         /* call trigger on the frontend after the backend. */
2304         ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2305         if (ret < 0)
2306                 return ret;
2307
2308         dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2309                 fe->dai_link->name, cmd);
2310
2311         ret = soc_pcm_trigger(substream, cmd);
2312
2313         return ret;
2314 }
2315
2316 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2317 {
2318         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2319         int stream = substream->stream;
2320         int ret = 0;
2321         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2322
2323         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2324
2325         switch (trigger) {
2326         case SND_SOC_DPCM_TRIGGER_PRE:
2327                 switch (cmd) {
2328                 case SNDRV_PCM_TRIGGER_START:
2329                 case SNDRV_PCM_TRIGGER_RESUME:
2330                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2331                 case SNDRV_PCM_TRIGGER_DRAIN:
2332                         ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2333                         break;
2334                 case SNDRV_PCM_TRIGGER_STOP:
2335                 case SNDRV_PCM_TRIGGER_SUSPEND:
2336                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2337                         ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2338                         break;
2339                 default:
2340                         ret = -EINVAL;
2341                         break;
2342                 }
2343                 break;
2344         case SND_SOC_DPCM_TRIGGER_POST:
2345                 switch (cmd) {
2346                 case SNDRV_PCM_TRIGGER_START:
2347                 case SNDRV_PCM_TRIGGER_RESUME:
2348                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2349                 case SNDRV_PCM_TRIGGER_DRAIN:
2350                         ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2351                         break;
2352                 case SNDRV_PCM_TRIGGER_STOP:
2353                 case SNDRV_PCM_TRIGGER_SUSPEND:
2354                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2355                         ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2356                         break;
2357                 default:
2358                         ret = -EINVAL;
2359                         break;
2360                 }
2361                 break;
2362         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2363                 /* bespoke trigger() - handles both FE and BEs */
2364
2365                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2366                                 fe->dai_link->name, cmd);
2367
2368                 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2369                 break;
2370         default:
2371                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2372                                 fe->dai_link->name);
2373                 ret = -EINVAL;
2374                 goto out;
2375         }
2376
2377         if (ret < 0) {
2378                 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2379                         cmd, ret);
2380                 goto out;
2381         }
2382
2383         switch (cmd) {
2384         case SNDRV_PCM_TRIGGER_START:
2385         case SNDRV_PCM_TRIGGER_RESUME:
2386         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2387                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2388                 break;
2389         case SNDRV_PCM_TRIGGER_STOP:
2390         case SNDRV_PCM_TRIGGER_SUSPEND:
2391                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2392                 break;
2393         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2394                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2395                 break;
2396         }
2397
2398 out:
2399         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2400         return ret;
2401 }
2402
2403 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2404 {
2405         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2406         int stream = substream->stream;
2407
2408         /* if FE's runtime_update is already set, we're in race;
2409          * process this trigger later at exit
2410          */
2411         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2412                 fe->dpcm[stream].trigger_pending = cmd + 1;
2413                 return 0; /* delayed, assuming it's successful */
2414         }
2415
2416         /* we're alone, let's trigger */
2417         return dpcm_fe_dai_do_trigger(substream, cmd);
2418 }
2419
2420 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2421 {
2422         struct snd_soc_dpcm *dpcm;
2423         int ret = 0;
2424
2425         for_each_dpcm_be(fe, stream, dpcm) {
2426
2427                 struct snd_soc_pcm_runtime *be = dpcm->be;
2428                 struct snd_pcm_substream *be_substream =
2429                         snd_soc_dpcm_get_substream(be, stream);
2430
2431                 /* is this op for this BE ? */
2432                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2433                         continue;
2434
2435                 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2436                         continue;
2437
2438                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2439                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2440                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2441                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2442                         continue;
2443
2444                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2445                         be->dai_link->name);
2446
2447                 ret = __soc_pcm_prepare(be, be_substream);
2448                 if (ret < 0)
2449                         break;
2450
2451                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2452         }
2453
2454         return soc_pcm_ret(fe, ret);
2455 }
2456
2457 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2458 {
2459         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2460         int stream = substream->stream, ret = 0;
2461
2462         snd_soc_dpcm_mutex_lock(fe);
2463
2464         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2465
2466         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2467
2468         /* there is no point preparing this FE if there are no BEs */
2469         if (list_empty(&fe->dpcm[stream].be_clients)) {
2470                 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */
2471                 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n",
2472                              fe->dai_link->name);
2473                 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2474                         fe->dai_link->name);
2475                 ret = -EINVAL;
2476                 goto out;
2477         }
2478
2479         ret = dpcm_be_dai_prepare(fe, stream);
2480         if (ret < 0)
2481                 goto out;
2482
2483         /* call prepare on the frontend */
2484         ret = __soc_pcm_prepare(fe, substream);
2485         if (ret < 0)
2486                 goto out;
2487
2488         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2489
2490 out:
2491         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2492         snd_soc_dpcm_mutex_unlock(fe);
2493
2494         return soc_pcm_ret(fe, ret);
2495 }
2496
2497 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2498 {
2499         struct snd_pcm_substream *substream =
2500                 snd_soc_dpcm_get_substream(fe, stream);
2501         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2502         int err;
2503
2504         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2505                         stream ? "capture" : "playback", fe->dai_link->name);
2506
2507         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2508                 /* call bespoke trigger - FE takes care of all BE triggers */
2509                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2510                                 fe->dai_link->name);
2511
2512                 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2513         } else {
2514                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2515                         fe->dai_link->name);
2516
2517                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2518         }
2519
2520         dpcm_be_dai_hw_free(fe, stream);
2521
2522         dpcm_be_dai_shutdown(fe, stream);
2523
2524         /* run the stream event for each BE */
2525         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2526
2527         return soc_pcm_ret(fe, err);
2528 }
2529
2530 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2531 {
2532         struct snd_pcm_substream *substream =
2533                 snd_soc_dpcm_get_substream(fe, stream);
2534         struct snd_soc_dpcm *dpcm;
2535         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2536         int ret = 0;
2537
2538         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2539                         stream ? "capture" : "playback", fe->dai_link->name);
2540
2541         /* Only start the BE if the FE is ready */
2542         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2543                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2544                 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2545                         fe->dai_link->name, fe->dpcm[stream].state);
2546                 ret = -EINVAL;
2547                 goto disconnect;
2548         }
2549
2550         /* startup must always be called for new BEs */
2551         ret = dpcm_be_dai_startup(fe, stream);
2552         if (ret < 0)
2553                 goto disconnect;
2554
2555         /* keep going if FE state is > open */
2556         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2557                 return 0;
2558
2559         ret = dpcm_be_dai_hw_params(fe, stream);
2560         if (ret < 0)
2561                 goto close;
2562
2563         /* keep going if FE state is > hw_params */
2564         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2565                 return 0;
2566
2567         ret = dpcm_be_dai_prepare(fe, stream);
2568         if (ret < 0)
2569                 goto hw_free;
2570
2571         /* run the stream event for each BE */
2572         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2573
2574         /* keep going if FE state is > prepare */
2575         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2576                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2577                 return 0;
2578
2579         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2580                 /* call trigger on the frontend - FE takes care of all BE triggers */
2581                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2582                                 fe->dai_link->name);
2583
2584                 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2585                 if (ret < 0)
2586                         goto hw_free;
2587         } else {
2588                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2589                         fe->dai_link->name);
2590
2591                 ret = dpcm_be_dai_trigger(fe, stream,
2592                                         SNDRV_PCM_TRIGGER_START);
2593                 if (ret < 0)
2594                         goto hw_free;
2595         }
2596
2597         return 0;
2598
2599 hw_free:
2600         dpcm_be_dai_hw_free(fe, stream);
2601 close:
2602         dpcm_be_dai_shutdown(fe, stream);
2603 disconnect:
2604         /* disconnect any pending BEs */
2605         for_each_dpcm_be(fe, stream, dpcm) {
2606                 struct snd_soc_pcm_runtime *be = dpcm->be;
2607
2608                 /* is this op for this BE ? */
2609                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2610                         continue;
2611
2612                 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2613                         be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2614                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2615         }
2616
2617         return soc_pcm_ret(fe, ret);
2618 }
2619
2620 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2621 {
2622         struct snd_soc_dapm_widget_list *list;
2623         int stream;
2624         int count, paths;
2625
2626         if (!fe->dai_link->dynamic)
2627                 return 0;
2628
2629         if (fe->dai_link->num_cpus > 1) {
2630                 dev_err(fe->dev,
2631                         "%s doesn't support Multi CPU yet\n", __func__);
2632                 return -EINVAL;
2633         }
2634
2635         /* only check active links */
2636         if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
2637                 return 0;
2638
2639         /* DAPM sync will call this to update DSP paths */
2640         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2641                 new ? "new" : "old", fe->dai_link->name);
2642
2643         for_each_pcm_streams(stream) {
2644
2645                 /* skip if FE doesn't have playback/capture capability */
2646                 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0),   stream) ||
2647                     !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
2648                         continue;
2649
2650                 /* skip if FE isn't currently playing/capturing */
2651                 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2652                     !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
2653                         continue;
2654
2655                 paths = dpcm_path_get(fe, stream, &list);
2656                 if (paths < 0)
2657                         return paths;
2658
2659                 /* update any playback/capture paths */
2660                 count = dpcm_process_paths(fe, stream, &list, new);
2661                 if (count) {
2662                         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2663                         if (new)
2664                                 dpcm_run_update_startup(fe, stream);
2665                         else
2666                                 dpcm_run_update_shutdown(fe, stream);
2667                         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2668
2669                         dpcm_clear_pending_state(fe, stream);
2670                         dpcm_be_disconnect(fe, stream);
2671                 }
2672
2673                 dpcm_path_put(&list);
2674         }
2675
2676         return 0;
2677 }
2678
2679 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2680  * any DAI links.
2681  */
2682 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2683 {
2684         struct snd_soc_pcm_runtime *fe;
2685         int ret = 0;
2686
2687         snd_soc_dpcm_mutex_lock(card);
2688         /* shutdown all old paths first */
2689         for_each_card_rtds(card, fe) {
2690                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2691                 if (ret)
2692                         goto out;
2693         }
2694
2695         /* bring new paths up */
2696         for_each_card_rtds(card, fe) {
2697                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2698                 if (ret)
2699                         goto out;
2700         }
2701
2702 out:
2703         snd_soc_dpcm_mutex_unlock(card);
2704         return ret;
2705 }
2706 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2707
2708 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2709 {
2710         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2711         struct snd_soc_dpcm *dpcm;
2712         int stream = fe_substream->stream;
2713
2714         snd_soc_dpcm_mutex_assert_held(fe);
2715
2716         /* mark FE's links ready to prune */
2717         for_each_dpcm_be(fe, stream, dpcm)
2718                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2719
2720         dpcm_be_disconnect(fe, stream);
2721 }
2722
2723 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2724 {
2725         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2726         int ret;
2727
2728         snd_soc_dpcm_mutex_lock(fe);
2729         ret = dpcm_fe_dai_shutdown(fe_substream);
2730
2731         dpcm_fe_dai_cleanup(fe_substream);
2732
2733         snd_soc_dpcm_mutex_unlock(fe);
2734         return ret;
2735 }
2736
2737 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2738 {
2739         struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2740         struct snd_soc_dapm_widget_list *list;
2741         int ret;
2742         int stream = fe_substream->stream;
2743
2744         snd_soc_dpcm_mutex_lock(fe);
2745
2746         ret = dpcm_path_get(fe, stream, &list);
2747         if (ret < 0)
2748                 goto open_end;
2749
2750         /* calculate valid and active FE <-> BE dpcms */
2751         dpcm_process_paths(fe, stream, &list, 1);
2752
2753         ret = dpcm_fe_dai_startup(fe_substream);
2754         if (ret < 0)
2755                 dpcm_fe_dai_cleanup(fe_substream);
2756
2757         dpcm_clear_pending_state(fe, stream);
2758         dpcm_path_put(&list);
2759 open_end:
2760         snd_soc_dpcm_mutex_unlock(fe);
2761         return ret;
2762 }
2763
2764 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2765                                     int *playback, int *capture)
2766 {
2767         struct snd_soc_dai_link *dai_link = rtd->dai_link;
2768         struct snd_soc_dai *cpu_dai;
2769         int has_playback = 0;
2770         int has_capture  = 0;
2771         int i;
2772
2773         if (dai_link->dynamic && dai_link->num_cpus > 1) {
2774                 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2775                 return -EINVAL;
2776         }
2777
2778         if (dai_link->dynamic || dai_link->no_pcm) {
2779                 int stream;
2780
2781                 if (dai_link->dpcm_playback) {
2782                         stream = SNDRV_PCM_STREAM_PLAYBACK;
2783
2784                         for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2785                                 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2786                                         has_playback = 1;
2787                                         break;
2788                                 }
2789                         }
2790                         if (!has_playback) {
2791                                 dev_err(rtd->card->dev,
2792                                         "No CPU DAIs support playback for stream %s\n",
2793                                         dai_link->stream_name);
2794                                 return -EINVAL;
2795                         }
2796                 }
2797                 if (dai_link->dpcm_capture) {
2798                         stream = SNDRV_PCM_STREAM_CAPTURE;
2799
2800                         for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2801                                 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2802                                         has_capture = 1;
2803                                         break;
2804                                 }
2805                         }
2806
2807                         if (!has_capture) {
2808                                 dev_err(rtd->card->dev,
2809                                         "No CPU DAIs support capture for stream %s\n",
2810                                         dai_link->stream_name);
2811                                 return -EINVAL;
2812                         }
2813                 }
2814         } else {
2815                 struct snd_soc_dai *codec_dai;
2816
2817                 /* Adapt stream for codec2codec links */
2818                 int cpu_capture  = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE);
2819                 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK);
2820
2821                 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2822                         if (dai_link->num_cpus == 1) {
2823                                 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
2824                         } else if (dai_link->num_cpus == dai_link->num_codecs) {
2825                                 cpu_dai = asoc_rtd_to_cpu(rtd, i);
2826                         } else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) {
2827                                 int cpu_id;
2828
2829                                 if (!rtd->dai_link->codec_ch_maps) {
2830                                         dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n",
2831                                                 __func__);
2832                                         return -EINVAL;
2833                                 }
2834
2835                                 cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id;
2836                                 cpu_dai = asoc_rtd_to_cpu(rtd, cpu_id);
2837                         } else {
2838                                 dev_err(rtd->card->dev,
2839                                         "%s codec number %d < cpu number %d is not supported\n",
2840                                         __func__, rtd->dai_link->num_codecs,
2841                                         rtd->dai_link->num_cpus);
2842                                 return -EINVAL;
2843                         }
2844
2845                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2846                             snd_soc_dai_stream_valid(cpu_dai,   cpu_playback))
2847                                 has_playback = 1;
2848                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2849                             snd_soc_dai_stream_valid(cpu_dai,   cpu_capture))
2850                                 has_capture = 1;
2851                 }
2852         }
2853
2854         if (dai_link->playback_only)
2855                 has_capture = 0;
2856
2857         if (dai_link->capture_only)
2858                 has_playback = 0;
2859
2860         if (!has_playback && !has_capture) {
2861                 dev_err(rtd->dev, "substream %s has no playback, no capture\n",
2862                         dai_link->stream_name);
2863
2864                 return -EINVAL;
2865         }
2866
2867         *playback = has_playback;
2868         *capture  = has_capture;
2869
2870         return 0;
2871 }
2872
2873 static int soc_create_pcm(struct snd_pcm **pcm,
2874                           struct snd_soc_pcm_runtime *rtd,
2875                           int playback, int capture, int num)
2876 {
2877         char new_name[64];
2878         int ret;
2879
2880         /* create the PCM */
2881         if (rtd->dai_link->c2c_params) {
2882                 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2883                          rtd->dai_link->stream_name);
2884
2885                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2886                                            playback, capture, pcm);
2887         } else if (rtd->dai_link->no_pcm) {
2888                 snprintf(new_name, sizeof(new_name), "(%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 {
2894                 if (rtd->dai_link->dynamic)
2895                         snprintf(new_name, sizeof(new_name), "%s (*)",
2896                                 rtd->dai_link->stream_name);
2897                 else
2898                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2899                                 rtd->dai_link->stream_name,
2900                                 soc_codec_dai_name(rtd), num);
2901
2902                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2903                         capture, pcm);
2904         }
2905         if (ret < 0) {
2906                 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2907                         new_name, rtd->dai_link->name, ret);
2908                 return ret;
2909         }
2910         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2911
2912         return 0;
2913 }
2914
2915 /* create a new pcm */
2916 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2917 {
2918         struct snd_soc_component *component;
2919         struct snd_pcm *pcm;
2920         int ret = 0, playback = 0, capture = 0;
2921         int i;
2922
2923         ret = soc_get_playback_capture(rtd, &playback, &capture);
2924         if (ret < 0)
2925                 return ret;
2926
2927         ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2928         if (ret < 0)
2929                 return ret;
2930
2931         /* DAPM dai link stream work */
2932         /*
2933          * Currently nothing to do for c2c links
2934          * Since c2c links are internal nodes in the DAPM graph and
2935          * don't interface with the outside world or application layer
2936          * we don't have to do any special handling on close.
2937          */
2938         if (!rtd->dai_link->c2c_params)
2939                 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2940
2941         rtd->pcm = pcm;
2942         pcm->nonatomic = rtd->dai_link->nonatomic;
2943         pcm->private_data = rtd;
2944         pcm->no_device_suspend = true;
2945
2946         if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) {
2947                 if (playback)
2948                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2949                 if (capture)
2950                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2951                 goto out;
2952         }
2953
2954         /* ASoC PCM operations */
2955         if (rtd->dai_link->dynamic) {
2956                 rtd->ops.open           = dpcm_fe_dai_open;
2957                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
2958                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
2959                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
2960                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
2961                 rtd->ops.close          = dpcm_fe_dai_close;
2962                 rtd->ops.pointer        = soc_pcm_pointer;
2963         } else {
2964                 rtd->ops.open           = soc_pcm_open;
2965                 rtd->ops.hw_params      = soc_pcm_hw_params;
2966                 rtd->ops.prepare        = soc_pcm_prepare;
2967                 rtd->ops.trigger        = soc_pcm_trigger;
2968                 rtd->ops.hw_free        = soc_pcm_hw_free;
2969                 rtd->ops.close          = soc_pcm_close;
2970                 rtd->ops.pointer        = soc_pcm_pointer;
2971         }
2972
2973         for_each_rtd_components(rtd, i, component) {
2974                 const struct snd_soc_component_driver *drv = component->driver;
2975
2976                 if (drv->ioctl)
2977                         rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2978                 if (drv->sync_stop)
2979                         rtd->ops.sync_stop      = snd_soc_pcm_component_sync_stop;
2980                 if (drv->copy_user)
2981                         rtd->ops.copy_user      = snd_soc_pcm_component_copy_user;
2982                 if (drv->page)
2983                         rtd->ops.page           = snd_soc_pcm_component_page;
2984                 if (drv->mmap)
2985                         rtd->ops.mmap           = snd_soc_pcm_component_mmap;
2986                 if (drv->ack)
2987                         rtd->ops.ack            = snd_soc_pcm_component_ack;
2988         }
2989
2990         if (playback)
2991                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2992
2993         if (capture)
2994                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2995
2996         ret = snd_soc_pcm_component_new(rtd);
2997         if (ret < 0)
2998                 return ret;
2999 out:
3000         dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
3001                 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
3002         return ret;
3003 }
3004
3005 /* is the current PCM operation for this FE ? */
3006 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3007 {
3008         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3009                 return 1;
3010         return 0;
3011 }
3012 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3013
3014 /* is the current PCM operation for this BE ? */
3015 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3016                 struct snd_soc_pcm_runtime *be, int stream)
3017 {
3018         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3019            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3020                   be->dpcm[stream].runtime_update))
3021                 return 1;
3022         return 0;
3023 }
3024 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3025
3026 /* get the substream for this BE */
3027 struct snd_pcm_substream *
3028         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3029 {
3030         return be->pcm->streams[stream].substream;
3031 }
3032 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3033
3034 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
3035                                     struct snd_soc_pcm_runtime *be,
3036                                     int stream,
3037                                     const enum snd_soc_dpcm_state *states,
3038                                     int num_states)
3039 {
3040         struct snd_soc_dpcm *dpcm;
3041         int state;
3042         int ret = 1;
3043         int i;
3044
3045         for_each_dpcm_fe(be, stream, dpcm) {
3046
3047                 if (dpcm->fe == fe)
3048                         continue;
3049
3050                 state = dpcm->fe->dpcm[stream].state;
3051                 for (i = 0; i < num_states; i++) {
3052                         if (state == states[i]) {
3053                                 ret = 0;
3054                                 break;
3055                         }
3056                 }
3057         }
3058
3059         /* it's safe to do this BE DAI */
3060         return ret;
3061 }
3062
3063 /*
3064  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3065  * are not running, paused or suspended for the specified stream direction.
3066  */
3067 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3068                 struct snd_soc_pcm_runtime *be, int stream)
3069 {
3070         const enum snd_soc_dpcm_state state[] = {
3071                 SND_SOC_DPCM_STATE_START,
3072                 SND_SOC_DPCM_STATE_PAUSED,
3073                 SND_SOC_DPCM_STATE_SUSPEND,
3074         };
3075
3076         return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3077 }
3078 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3079
3080 /*
3081  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3082  * running, paused or suspended for the specified stream direction.
3083  */
3084 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3085                 struct snd_soc_pcm_runtime *be, int stream)
3086 {
3087         const enum snd_soc_dpcm_state state[] = {
3088                 SND_SOC_DPCM_STATE_START,
3089                 SND_SOC_DPCM_STATE_PAUSED,
3090                 SND_SOC_DPCM_STATE_SUSPEND,
3091                 SND_SOC_DPCM_STATE_PREPARE,
3092         };
3093
3094         return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3095 }
3096 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3097
3098 /*
3099  * We can only prepare a BE DAI if any of it's FE are not prepared,
3100  * running or paused for the specified stream direction.
3101  */
3102 int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
3103                                  struct snd_soc_pcm_runtime *be, int stream)
3104 {
3105         const enum snd_soc_dpcm_state state[] = {
3106                 SND_SOC_DPCM_STATE_START,
3107                 SND_SOC_DPCM_STATE_PAUSED,
3108                 SND_SOC_DPCM_STATE_PREPARE,
3109         };
3110
3111         return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3112 }
3113 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);