sound/soc/soc-compress.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // soc-compress.c  --  ALSA SoC Compress
   4 //
   5 // Copyright (C) 2012 Intel Corp.
   6 //
   7 // Authors: Namarta Kohli <namartax.kohli@intel.com>
   8 //          Ramesh Babu K V <ramesh.babu@linux.intel.com>
   9 //          Vinod Koul <vinod.koul@linux.intel.com>
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/slab.h>
  15 #include <linux/workqueue.h>
  16 #include <sound/core.h>
  17 #include <sound/compress_params.h>
  18 #include <sound/compress_driver.h>
  19 #include <sound/soc.h>
  20 #include <sound/initval.h>
  21 #include <sound/soc-dpcm.h>
  22 #include <sound/soc-link.h>
  23 #include <linux/pm_runtime.h>
  24
  25 static int soc_compr_components_open(struct snd_compr_stream *cstream,
  26                                      struct snd_soc_component **last)
  27 {
  28         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
  29         struct snd_soc_component *component;
  30         int i, ret;
  31
  32         for_each_rtd_components(rtd, i, component) {
  33                 if (!component->driver->compress_ops ||
  34                     !component->driver->compress_ops->open)
  35                         continue;
  36
  37                 ret = component->driver->compress_ops->open(component, cstream);
  38                 if (ret < 0) {
  39                         dev_err(component->dev,
  40                                 "Compress ASoC: can't open platform %s: %d\n",
  41                                 component->name, ret);
  42
  43                         *last = component;
  44                         return ret;
  45                 }
  46         }
  47
  48         *last = NULL;
  49         return 0;
  50 }
  51
  52 static int soc_compr_components_free(struct snd_compr_stream *cstream,
  53                                      struct snd_soc_component *last)
  54 {
  55         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
  56         struct snd_soc_component *component;
  57         int i;
  58
  59         for_each_rtd_components(rtd, i, component) {
  60                 if (component == last)
  61                         break;
  62
  63                 if (!component->driver->compress_ops ||
  64                     !component->driver->compress_ops->free)
  65                         continue;
  66
  67                 component->driver->compress_ops->free(component, cstream);
  68         }
  69
  70         return 0;
  71 }
  72
  73 static int soc_compr_open(struct snd_compr_stream *cstream)
  74 {
  75         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
  76         struct snd_soc_component *component = NULL;
  77         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  78         int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
  79         int ret;
  80
  81         ret = snd_soc_pcm_component_pm_runtime_get(rtd, cstream);
  82         if (ret < 0)
  83                 goto pm_err;
  84
  85         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
  86
  87         ret = snd_soc_dai_compr_startup(cpu_dai, cstream);
  88         if (ret < 0)
  89                 goto out;
  90
  91         ret = soc_compr_components_open(cstream, &component);
  92         if (ret < 0)
  93                 goto machine_err;
  94
  95         ret = snd_soc_link_compr_startup(cstream);
  96         if (ret < 0)
  97                 goto machine_err;
  98
  99         snd_soc_runtime_activate(rtd, stream);
 100
 101         mutex_unlock(&rtd->card->pcm_mutex);
 102
 103         return 0;
 104
 105 machine_err:
 106         soc_compr_components_free(cstream, component);
 107
 108         snd_soc_dai_compr_shutdown(cpu_dai, cstream);
 109 out:
 110         mutex_unlock(&rtd->card->pcm_mutex);
 111 pm_err:
 112         snd_soc_pcm_component_pm_runtime_put(rtd, cstream, 1);
 113
 114         return ret;
 115 }
 116
 117 static int soc_compr_open_fe(struct snd_compr_stream *cstream)
 118 {
 119         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 120         struct snd_pcm_substream *fe_substream =
 121                  fe->pcm->streams[cstream->direction].substream;
 122         struct snd_soc_component *component;
 123         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
 124         struct snd_soc_dpcm *dpcm;
 125         struct snd_soc_dapm_widget_list *list;
 126         int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 127         int ret;
 128
 129         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 130         fe->dpcm[stream].runtime = fe_substream->runtime;
 131
 132         ret = dpcm_path_get(fe, stream, &list);
 133         if (ret < 0)
 134                 goto be_err;
 135         else if (ret == 0)
 136                 dev_dbg(fe->dev, "Compress ASoC: %s no valid %s route\n",
 137                         fe->dai_link->name, stream ? "capture" : "playback");
 138         /* calculate valid and active FE <-> BE dpcms */
 139         dpcm_process_paths(fe, stream, &list, 1);
 140         fe->dpcm[stream].runtime = fe_substream->runtime;
 141
 142         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 143
 144         ret = dpcm_be_dai_startup(fe, stream);
 145         if (ret < 0) {
 146                 /* clean up all links */
 147                 for_each_dpcm_be(fe, stream, dpcm)
 148                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
 149
 150                 dpcm_be_disconnect(fe, stream);
 151                 fe->dpcm[stream].runtime = NULL;
 152                 goto out;
 153         }
 154
 155         ret = snd_soc_dai_compr_startup(cpu_dai, cstream);
 156         if (ret < 0)
 157                 goto out;
 158
 159         ret = soc_compr_components_open(cstream, &component);
 160         if (ret < 0)
 161                 goto open_err;
 162
 163         ret = snd_soc_link_compr_startup(cstream);
 164         if (ret < 0)
 165                 goto machine_err;
 166
 167         dpcm_clear_pending_state(fe, stream);
 168         dpcm_path_put(&list);
 169
 170         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
 171         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 172
 173         snd_soc_runtime_activate(fe, stream);
 174
 175         mutex_unlock(&fe->card->mutex);
 176
 177         return 0;
 178
 179 machine_err:
 180         soc_compr_components_free(cstream, component);
 181 open_err:
 182         snd_soc_dai_compr_shutdown(cpu_dai, cstream);
 183 out:
 184         dpcm_path_put(&list);
 185 be_err:
 186         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 187         mutex_unlock(&fe->card->mutex);
 188         return ret;
 189 }
 190
 191 static int soc_compr_free(struct snd_compr_stream *cstream)
 192 {
 193         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 194         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 195         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 196         int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 197
 198         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 199
 200         snd_soc_runtime_deactivate(rtd, stream);
 201
 202         snd_soc_dai_digital_mute(codec_dai, 1, stream);
 203
 204         if (!snd_soc_dai_active(cpu_dai))
 205                 cpu_dai->rate = 0;
 206
 207         if (!snd_soc_dai_active(codec_dai))
 208                 codec_dai->rate = 0;
 209
 210         snd_soc_link_compr_shutdown(cstream);
 211
 212         soc_compr_components_free(cstream, NULL);
 213
 214         snd_soc_dai_compr_shutdown(cpu_dai, cstream);
 215
 216         snd_soc_dapm_stream_stop(rtd, stream);
 217
 218         mutex_unlock(&rtd->card->pcm_mutex);
 219
 220         snd_soc_pcm_component_pm_runtime_put(rtd, cstream, 0);
 221
 222         return 0;
 223 }
 224
 225 static int soc_compr_free_fe(struct snd_compr_stream *cstream)
 226 {
 227         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 228         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
 229         struct snd_soc_dpcm *dpcm;
 230         int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 231         int ret;
 232
 233         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 234
 235         snd_soc_runtime_deactivate(fe, stream);
 236
 237         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 238
 239         ret = dpcm_be_dai_hw_free(fe, stream);
 240         if (ret < 0)
 241                 dev_err(fe->dev, "Compressed ASoC: hw_free failed: %d\n", ret);
 242
 243         ret = dpcm_be_dai_shutdown(fe, stream);
 244
 245         /* mark FE's links ready to prune */
 246         for_each_dpcm_be(fe, stream, dpcm)
 247                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
 248
 249         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
 250
 251         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
 252         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 253
 254         dpcm_be_disconnect(fe, stream);
 255
 256         fe->dpcm[stream].runtime = NULL;
 257
 258         snd_soc_link_compr_shutdown(cstream);
 259
 260         soc_compr_components_free(cstream, NULL);
 261
 262         snd_soc_dai_compr_shutdown(cpu_dai, cstream);
 263
 264         mutex_unlock(&fe->card->mutex);
 265         return 0;
 266 }
 267
 268 static int soc_compr_components_trigger(struct snd_compr_stream *cstream,
 269                                         int cmd)
 270 {
 271         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 272         struct snd_soc_component *component;
 273         int i, ret;
 274
 275         for_each_rtd_components(rtd, i, component) {
 276                 if (!component->driver->compress_ops ||
 277                     !component->driver->compress_ops->trigger)
 278                         continue;
 279
 280                 ret = component->driver->compress_ops->trigger(
 281                         component, cstream, cmd);
 282                 if (ret < 0)
 283                         return ret;
 284         }
 285
 286         return 0;
 287 }
 288
 289 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 290 {
 291         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 292         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 293         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 294         int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 295         int ret;
 296
 297         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 298
 299         ret = soc_compr_components_trigger(cstream, cmd);
 300         if (ret < 0)
 301                 goto out;
 302
 303         ret = snd_soc_dai_compr_trigger(cpu_dai, cstream, cmd);
 304         if (ret < 0)
 305                 goto out;
 306
 307         switch (cmd) {
 308         case SNDRV_PCM_TRIGGER_START:
 309                 snd_soc_dai_digital_mute(codec_dai, 0, stream);
 310                 break;
 311         case SNDRV_PCM_TRIGGER_STOP:
 312                 snd_soc_dai_digital_mute(codec_dai, 1, stream);
 313                 break;
 314         }
 315
 316 out:
 317         mutex_unlock(&rtd->card->pcm_mutex);
 318         return ret;
 319 }
 320
 321 static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
 322 {
 323         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 324         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
 325         int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 326         int ret;
 327
 328         if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
 329             cmd == SND_COMPR_TRIGGER_DRAIN)
 330                 return soc_compr_components_trigger(cstream, cmd);
 331
 332         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 333
 334         ret = snd_soc_dai_compr_trigger(cpu_dai, cstream, cmd);
 335         if (ret < 0)
 336                 goto out;
 337
 338         ret = soc_compr_components_trigger(cstream, cmd);
 339         if (ret < 0)
 340                 goto out;
 341
 342         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 343
 344         ret = dpcm_be_dai_trigger(fe, stream, cmd);
 345
 346         switch (cmd) {
 347         case SNDRV_PCM_TRIGGER_START:
 348         case SNDRV_PCM_TRIGGER_RESUME:
 349         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 350                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
 351                 break;
 352         case SNDRV_PCM_TRIGGER_STOP:
 353         case SNDRV_PCM_TRIGGER_SUSPEND:
 354                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
 355                 break;
 356         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 357                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
 358                 break;
 359         }
 360
 361 out:
 362         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 363         mutex_unlock(&fe->card->mutex);
 364         return ret;
 365 }
 366
 367 static int soc_compr_components_set_params(struct snd_compr_stream *cstream,
 368                                            struct snd_compr_params *params)
 369 {
 370         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 371         struct snd_soc_component *component;
 372         int i, ret;
 373
 374         for_each_rtd_components(rtd, i, component) {
 375                 if (!component->driver->compress_ops ||
 376                     !component->driver->compress_ops->set_params)
 377                         continue;
 378
 379                 ret = component->driver->compress_ops->set_params(
 380                         component, cstream, params);
 381                 if (ret < 0)
 382                         return ret;
 383         }
 384
 385         return 0;
 386 }
 387
 388 static int soc_compr_set_params(struct snd_compr_stream *cstream,
 389                                 struct snd_compr_params *params)
 390 {
 391         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 392         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 393         int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 394         int ret;
 395
 396         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 397
 398         /*
 399          * First we call set_params for the CPU DAI, then the component
 400          * driver this should configure the SoC side. If the machine has
 401          * compressed ops then we call that as well. The expectation is
 402          * that these callbacks will configure everything for this compress
 403          * path, like configuring a PCM port for a CODEC.
 404          */
 405         ret = snd_soc_dai_compr_set_params(cpu_dai, cstream, params);
 406         if (ret < 0)
 407                 goto err;
 408
 409         ret = soc_compr_components_set_params(cstream, params);
 410         if (ret < 0)
 411                 goto err;
 412
 413         ret = snd_soc_link_compr_set_params(cstream);
 414         if (ret < 0)
 415                 goto err;
 416
 417         snd_soc_dapm_stream_event(rtd, stream, SND_SOC_DAPM_STREAM_START);
 418
 419         /* cancel any delayed stream shutdown that is pending */
 420         rtd->pop_wait = 0;
 421         mutex_unlock(&rtd->card->pcm_mutex);
 422
 423         cancel_delayed_work_sync(&rtd->delayed_work);
 424
 425         return 0;
 426
 427 err:
 428         mutex_unlock(&rtd->card->pcm_mutex);
 429         return ret;
 430 }
 431
 432 static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
 433                                    struct snd_compr_params *params)
 434 {
 435         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 436         struct snd_pcm_substream *fe_substream =
 437                  fe->pcm->streams[cstream->direction].substream;
 438         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
 439         int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 440         int ret;
 441
 442         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 443
 444         /*
 445          * Create an empty hw_params for the BE as the machine driver must
 446          * fix this up to match DSP decoder and ASRC configuration.
 447          * I.e. machine driver fixup for compressed BE is mandatory.
 448          */
 449         memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
 450                 sizeof(struct snd_pcm_hw_params));
 451
 452         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 453
 454         ret = dpcm_be_dai_hw_params(fe, stream);
 455         if (ret < 0)
 456                 goto out;
 457
 458         ret = dpcm_be_dai_prepare(fe, stream);
 459         if (ret < 0)
 460                 goto out;
 461
 462         ret = snd_soc_dai_compr_set_params(cpu_dai, cstream, params);
 463         if (ret < 0)
 464                 goto out;
 465
 466         ret = soc_compr_components_set_params(cstream, params);
 467         if (ret < 0)
 468                 goto out;
 469
 470         ret = snd_soc_link_compr_set_params(cstream);
 471         if (ret < 0)
 472                 goto out;
 473
 474         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
 475         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
 476
 477 out:
 478         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 479         mutex_unlock(&fe->card->mutex);
 480         return ret;
 481 }
 482
 483 static int soc_compr_get_params(struct snd_compr_stream *cstream,
 484                                 struct snd_codec *params)
 485 {
 486         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 487         struct snd_soc_component *component;
 488         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 489         int i, ret = 0;
 490
 491         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 492
 493         ret = snd_soc_dai_compr_get_params(cpu_dai, cstream, params);
 494         if (ret < 0)
 495                 goto err;
 496
 497         for_each_rtd_components(rtd, i, component) {
 498                 if (!component->driver->compress_ops ||
 499                     !component->driver->compress_ops->get_params)
 500                         continue;
 501
 502                 ret = component->driver->compress_ops->get_params(
 503                         component, cstream, params);
 504                 break;
 505         }
 506
 507 err:
 508         mutex_unlock(&rtd->card->pcm_mutex);
 509         return ret;
 510 }
 511
 512 static int soc_compr_get_caps(struct snd_compr_stream *cstream,
 513                               struct snd_compr_caps *caps)
 514 {
 515         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 516         struct snd_soc_component *component;
 517         int i, ret = 0;
 518
 519         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 520
 521         for_each_rtd_components(rtd, i, component) {
 522                 if (!component->driver->compress_ops ||
 523                     !component->driver->compress_ops->get_caps)
 524                         continue;
 525
 526                 ret = component->driver->compress_ops->get_caps(
 527                         component, cstream, caps);
 528                 break;
 529         }
 530
 531         mutex_unlock(&rtd->card->pcm_mutex);
 532         return ret;
 533 }
 534
 535 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
 536                                     struct snd_compr_codec_caps *codec)
 537 {
 538         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 539         struct snd_soc_component *component;
 540         int i, ret = 0;
 541
 542         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 543
 544         for_each_rtd_components(rtd, i, component) {
 545                 if (!component->driver->compress_ops ||
 546                     !component->driver->compress_ops->get_codec_caps)
 547                         continue;
 548
 549                 ret = component->driver->compress_ops->get_codec_caps(
 550                         component, cstream, codec);
 551                 break;
 552         }
 553
 554         mutex_unlock(&rtd->card->pcm_mutex);
 555         return ret;
 556 }
 557
 558 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
 559 {
 560         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 561         struct snd_soc_component *component;
 562         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 563         int i, ret = 0;
 564
 565         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 566
 567         ret = snd_soc_dai_compr_ack(cpu_dai, cstream, bytes);
 568         if (ret < 0)
 569                 goto err;
 570
 571         for_each_rtd_components(rtd, i, component) {
 572                 if (!component->driver->compress_ops ||
 573                     !component->driver->compress_ops->ack)
 574                         continue;
 575
 576                 ret = component->driver->compress_ops->ack(
 577                         component, cstream, bytes);
 578                 if (ret < 0)
 579                         goto err;
 580         }
 581
 582 err:
 583         mutex_unlock(&rtd->card->pcm_mutex);
 584         return ret;
 585 }
 586
 587 static int soc_compr_pointer(struct snd_compr_stream *cstream,
 588                              struct snd_compr_tstamp *tstamp)
 589 {
 590         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 591         struct snd_soc_component *component;
 592         int i, ret = 0;
 593         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 594
 595         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 596
 597         ret = snd_soc_dai_compr_pointer(cpu_dai, cstream, tstamp);
 598         if (ret < 0)
 599                 goto out;
 600
 601         for_each_rtd_components(rtd, i, component) {
 602                 if (!component->driver->compress_ops ||
 603                     !component->driver->compress_ops->pointer)
 604                         continue;
 605
 606                 ret = component->driver->compress_ops->pointer(
 607                         component, cstream, tstamp);
 608                 break;
 609         }
 610 out:
 611         mutex_unlock(&rtd->card->pcm_mutex);
 612         return ret;
 613 }
 614
 615 static int soc_compr_copy(struct snd_compr_stream *cstream,
 616                           char __user *buf, size_t count)
 617 {
 618         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 619         struct snd_soc_component *component;
 620         int i, ret = 0;
 621
 622         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 623
 624         for_each_rtd_components(rtd, i, component) {
 625                 if (!component->driver->compress_ops ||
 626                     !component->driver->compress_ops->copy)
 627                         continue;
 628
 629                 ret = component->driver->compress_ops->copy(
 630                         component, cstream, buf, count);
 631                 break;
 632         }
 633
 634         mutex_unlock(&rtd->card->pcm_mutex);
 635         return ret;
 636 }
 637
 638 static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
 639                                   struct snd_compr_metadata *metadata)
 640 {
 641         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 642         struct snd_soc_component *component;
 643         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 644         int i, ret;
 645
 646         ret = snd_soc_dai_compr_set_metadata(cpu_dai, cstream, metadata);
 647         if (ret < 0)
 648                 return ret;
 649
 650         for_each_rtd_components(rtd, i, component) {
 651                 if (!component->driver->compress_ops ||
 652                     !component->driver->compress_ops->set_metadata)
 653                         continue;
 654
 655                 ret = component->driver->compress_ops->set_metadata(
 656                         component, cstream, metadata);
 657                 if (ret < 0)
 658                         return ret;
 659         }
 660
 661         return 0;
 662 }
 663
 664 static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
 665                                   struct snd_compr_metadata *metadata)
 666 {
 667         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 668         struct snd_soc_component *component;
 669         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 670         int i, ret;
 671
 672         ret = snd_soc_dai_compr_get_metadata(cpu_dai, cstream, metadata);
 673         if (ret < 0)
 674                 return ret;
 675
 676         for_each_rtd_components(rtd, i, component) {
 677                 if (!component->driver->compress_ops ||
 678                     !component->driver->compress_ops->get_metadata)
 679                         continue;
 680
 681                 return component->driver->compress_ops->get_metadata(
 682                         component, cstream, metadata);
 683         }
 684
 685         return 0;
 686 }
 687
 688 /* ASoC Compress operations */
 689 static struct snd_compr_ops soc_compr_ops = {
 690         .open           = soc_compr_open,
 691         .free           = soc_compr_free,
 692         .set_params     = soc_compr_set_params,
 693         .set_metadata   = soc_compr_set_metadata,
 694         .get_metadata   = soc_compr_get_metadata,
 695         .get_params     = soc_compr_get_params,
 696         .trigger        = soc_compr_trigger,
 697         .pointer        = soc_compr_pointer,
 698         .ack            = soc_compr_ack,
 699         .get_caps       = soc_compr_get_caps,
 700         .get_codec_caps = soc_compr_get_codec_caps
 701 };
 702
 703 /* ASoC Dynamic Compress operations */
 704 static struct snd_compr_ops soc_compr_dyn_ops = {
 705         .open           = soc_compr_open_fe,
 706         .free           = soc_compr_free_fe,
 707         .set_params     = soc_compr_set_params_fe,
 708         .get_params     = soc_compr_get_params,
 709         .set_metadata   = soc_compr_set_metadata,
 710         .get_metadata   = soc_compr_get_metadata,
 711         .trigger        = soc_compr_trigger_fe,
 712         .pointer        = soc_compr_pointer,
 713         .ack            = soc_compr_ack,
 714         .get_caps       = soc_compr_get_caps,
 715         .get_codec_caps = soc_compr_get_codec_caps
 716 };
 717
 718 /**
 719  * snd_soc_new_compress - create a new compress.
 720  *
 721  * @rtd: The runtime for which we will create compress
 722  * @num: the device index number (zero based - shared with normal PCMs)
 723  *
 724  * Return: 0 for success, else error.
 725  */
 726 int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 727 {
 728         struct snd_soc_component *component;
 729         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 730         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 731         struct snd_compr *compr;
 732         struct snd_pcm *be_pcm;
 733         char new_name[64];
 734         int ret = 0, direction = 0;
 735         int playback = 0, capture = 0;
 736         int i;
 737
 738         /*
 739          * make sure these are same value,
 740          * and then use these as equally
 741          */
 742         BUILD_BUG_ON((int)SNDRV_PCM_STREAM_PLAYBACK != (int)SND_COMPRESS_PLAYBACK);
 743         BUILD_BUG_ON((int)SNDRV_PCM_STREAM_CAPTURE  != (int)SND_COMPRESS_CAPTURE);
 744
 745         if (rtd->num_cpus > 1 ||
 746             rtd->num_codecs > 1) {
 747                 dev_err(rtd->card->dev,
 748                         "Compress ASoC: Multi CPU/Codec not supported\n");
 749                 return -EINVAL;
 750         }
 751
 752         /* check client and interface hw capabilities */
 753         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
 754             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
 755                 playback = 1;
 756         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
 757             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
 758                 capture = 1;
 759
 760         /*
 761          * Compress devices are unidirectional so only one of the directions
 762          * should be set, check for that (xor)
 763          */
 764         if (playback + capture != 1) {
 765                 dev_err(rtd->card->dev,
 766                         "Compress ASoC: Invalid direction for P %d, C %d\n",
 767                         playback, capture);
 768                 return -EINVAL;
 769         }
 770
 771         if (playback)
 772                 direction = SND_COMPRESS_PLAYBACK;
 773         else
 774                 direction = SND_COMPRESS_CAPTURE;
 775
 776         compr = devm_kzalloc(rtd->card->dev, sizeof(*compr), GFP_KERNEL);
 777         if (!compr)
 778                 return -ENOMEM;
 779
 780         compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
 781                                   GFP_KERNEL);
 782         if (!compr->ops)
 783                 return -ENOMEM;
 784
 785         if (rtd->dai_link->dynamic) {
 786                 snprintf(new_name, sizeof(new_name), "(%s)",
 787                         rtd->dai_link->stream_name);
 788
 789                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
 790                                 rtd->dai_link->dpcm_playback,
 791                                 rtd->dai_link->dpcm_capture, &be_pcm);
 792                 if (ret < 0) {
 793                         dev_err(rtd->card->dev,
 794                                 "Compress ASoC: can't create compressed for %s: %d\n",
 795                                 rtd->dai_link->name, ret);
 796                         return ret;
 797                 }
 798
 799                 rtd->pcm = be_pcm;
 800                 rtd->fe_compr = 1;
 801                 if (rtd->dai_link->dpcm_playback)
 802                         be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
 803                 else if (rtd->dai_link->dpcm_capture)
 804                         be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
 805                 memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
 806         } else {
 807                 snprintf(new_name, sizeof(new_name), "%s %s-%d",
 808                         rtd->dai_link->stream_name, codec_dai->name, num);
 809
 810                 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
 811         }
 812
 813         for_each_rtd_components(rtd, i, component) {
 814                 if (!component->driver->compress_ops ||
 815                     !component->driver->compress_ops->copy)
 816                         continue;
 817
 818                 compr->ops->copy = soc_compr_copy;
 819                 break;
 820         }
 821
 822         mutex_init(&compr->lock);
 823         ret = snd_compress_new(rtd->card->snd_card, num, direction,
 824                                 new_name, compr);
 825         if (ret < 0) {
 826                 component = asoc_rtd_to_codec(rtd, 0)->component;
 827                 dev_err(component->dev,
 828                         "Compress ASoC: can't create compress for codec %s: %d\n",
 829                         component->name, ret);
 830                 return ret;
 831         }
 832
 833         /* DAPM dai link stream work */
 834         rtd->close_delayed_work_func = snd_soc_close_delayed_work;
 835
 836         rtd->compr = compr;
 837         compr->private_data = rtd;
 838
 839         dev_dbg(rtd->card->dev, "Compress ASoC: %s <-> %s mapping ok\n",
 840                 codec_dai->name, cpu_dai->name);
 841
 842         return 0;
 843 }
 844 EXPORT_SYMBOL_GPL(snd_soc_new_compress);