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
  23 static int soc_compr_components_open(struct snd_compr_stream *cstream,
  24                                      struct snd_soc_component **last)
  25 {
  26         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
  27         struct snd_soc_component *component;
  28         struct snd_soc_rtdcom_list *rtdcom;
  29         int ret;
  30
  31         for_each_rtd_components(rtd, rtdcom, component) {
  32                 if (!component->driver->compr_ops ||
  33                     !component->driver->compr_ops->open)
  34                         continue;
  35
  36                 ret = component->driver->compr_ops->open(cstream);
  37                 if (ret < 0) {
  38                         dev_err(component->dev,
  39                                 "Compress ASoC: can't open platform %s: %d\n",
  40                                 component->name, ret);
  41
  42                         *last = component;
  43                         return ret;
  44                 }
  45         }
  46
  47         *last = NULL;
  48         return 0;
  49 }
  50
  51 static int soc_compr_components_free(struct snd_compr_stream *cstream,
  52                                      struct snd_soc_component *last)
  53 {
  54         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
  55         struct snd_soc_component *component;
  56         struct snd_soc_rtdcom_list *rtdcom;
  57
  58         for_each_rtd_components(rtd, rtdcom, component) {
  59                 if (component == last)
  60                         break;
  61
  62                 if (!component->driver->compr_ops ||
  63                     !component->driver->compr_ops->free)
  64                         continue;
  65
  66                 component->driver->compr_ops->free(cstream);
  67         }
  68
  69         return 0;
  70 }
  71
  72 static int soc_compr_open(struct snd_compr_stream *cstream)
  73 {
  74         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
  75         struct snd_soc_component *component;
  76         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  77         int ret;
  78
  79         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
  80
  81         if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
  82                 ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
  83                 if (ret < 0) {
  84                         dev_err(cpu_dai->dev,
  85                                 "Compress ASoC: can't open interface %s: %d\n",
  86                                 cpu_dai->name, ret);
  87                         goto out;
  88                 }
  89         }
  90
  91         ret = soc_compr_components_open(cstream, &component);
  92         if (ret < 0)
  93                 goto machine_err;
  94
  95         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
  96                 ret = rtd->dai_link->compr_ops->startup(cstream);
  97                 if (ret < 0) {
  98                         dev_err(rtd->dev,
  99                                 "Compress ASoC: %s startup failed: %d\n",
 100                                 rtd->dai_link->name, ret);
 101                         goto machine_err;
 102                 }
 103         }
 104
 105         snd_soc_runtime_activate(rtd, cstream->direction);
 106
 107         mutex_unlock(&rtd->card->pcm_mutex);
 108
 109         return 0;
 110
 111 machine_err:
 112         soc_compr_components_free(cstream, component);
 113
 114         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
 115                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
 116 out:
 117         mutex_unlock(&rtd->card->pcm_mutex);
 118         return ret;
 119 }
 120
 121 static int soc_compr_open_fe(struct snd_compr_stream *cstream)
 122 {
 123         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 124         struct snd_pcm_substream *fe_substream =
 125                  fe->pcm->streams[cstream->direction].substream;
 126         struct snd_soc_component *component;
 127         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 128         struct snd_soc_dpcm *dpcm;
 129         struct snd_soc_dapm_widget_list *list;
 130         int stream;
 131         int ret;
 132
 133         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 134                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 135         else
 136                 stream = SNDRV_PCM_STREAM_CAPTURE;
 137
 138         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 139         fe->dpcm[stream].runtime = fe_substream->runtime;
 140
 141         ret = dpcm_path_get(fe, stream, &list);
 142         if (ret < 0)
 143                 goto be_err;
 144         else if (ret == 0)
 145                 dev_dbg(fe->dev, "Compress ASoC: %s no valid %s route\n",
 146                         fe->dai_link->name, stream ? "capture" : "playback");
 147         /* calculate valid and active FE <-> BE dpcms */
 148         dpcm_process_paths(fe, stream, &list, 1);
 149         fe->dpcm[stream].runtime = fe_substream->runtime;
 150
 151         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 152
 153         ret = dpcm_be_dai_startup(fe, stream);
 154         if (ret < 0) {
 155                 /* clean up all links */
 156                 for_each_dpcm_be(fe, stream, dpcm)
 157                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
 158
 159                 dpcm_be_disconnect(fe, stream);
 160                 fe->dpcm[stream].runtime = NULL;
 161                 goto out;
 162         }
 163
 164         if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
 165                 ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
 166                 if (ret < 0) {
 167                         dev_err(cpu_dai->dev,
 168                                 "Compress ASoC: can't open interface %s: %d\n",
 169                                 cpu_dai->name, ret);
 170                         goto out;
 171                 }
 172         }
 173
 174         ret = soc_compr_components_open(cstream, &component);
 175         if (ret < 0)
 176                 goto open_err;
 177
 178         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) {
 179                 ret = fe->dai_link->compr_ops->startup(cstream);
 180                 if (ret < 0) {
 181                         pr_err("Compress ASoC: %s startup failed: %d\n",
 182                                fe->dai_link->name, ret);
 183                         goto machine_err;
 184                 }
 185         }
 186
 187         dpcm_clear_pending_state(fe, stream);
 188         dpcm_path_put(&list);
 189
 190         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
 191         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 192
 193         snd_soc_runtime_activate(fe, stream);
 194
 195         mutex_unlock(&fe->card->mutex);
 196
 197         return 0;
 198
 199 machine_err:
 200         soc_compr_components_free(cstream, component);
 201 open_err:
 202         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
 203                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
 204 out:
 205         dpcm_path_put(&list);
 206 be_err:
 207         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 208         mutex_unlock(&fe->card->mutex);
 209         return ret;
 210 }
 211
 212 /*
 213  * Power down the audio subsystem pmdown_time msecs after close is called.
 214  * This is to ensure there are no pops or clicks in between any music tracks
 215  * due to DAPM power cycling.
 216  */
 217 static void close_delayed_work(struct work_struct *work)
 218 {
 219         struct snd_soc_pcm_runtime *rtd =
 220                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 221         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 222
 223         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 224
 225         dev_dbg(rtd->dev,
 226                 "Compress ASoC: pop wq checking: %s status: %s waiting: %s\n",
 227                 codec_dai->driver->playback.stream_name,
 228                 codec_dai->playback_active ? "active" : "inactive",
 229                 rtd->pop_wait ? "yes" : "no");
 230
 231         /* are we waiting on this codec DAI stream */
 232         if (rtd->pop_wait == 1) {
 233                 rtd->pop_wait = 0;
 234                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 235                                           SND_SOC_DAPM_STREAM_STOP);
 236         }
 237
 238         mutex_unlock(&rtd->card->pcm_mutex);
 239 }
 240
 241 static int soc_compr_free(struct snd_compr_stream *cstream)
 242 {
 243         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 244         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 245         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 246         int stream;
 247
 248         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 249
 250         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 251                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 252         else
 253                 stream = SNDRV_PCM_STREAM_CAPTURE;
 254
 255         snd_soc_runtime_deactivate(rtd, stream);
 256
 257         snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
 258
 259         if (!cpu_dai->active)
 260                 cpu_dai->rate = 0;
 261
 262         if (!codec_dai->active)
 263                 codec_dai->rate = 0;
 264
 265         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
 266                 rtd->dai_link->compr_ops->shutdown(cstream);
 267
 268         soc_compr_components_free(cstream, NULL);
 269
 270         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
 271                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
 272
 273         if (cstream->direction == SND_COMPRESS_PLAYBACK) {
 274                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 275                         snd_soc_dapm_stream_event(rtd,
 276                                                   SNDRV_PCM_STREAM_PLAYBACK,
 277                                                   SND_SOC_DAPM_STREAM_STOP);
 278                 } else {
 279                         rtd->pop_wait = 1;
 280                         queue_delayed_work(system_power_efficient_wq,
 281                                            &rtd->delayed_work,
 282                                            msecs_to_jiffies(rtd->pmdown_time));
 283                 }
 284         } else {
 285                 /* capture streams can be powered down now */
 286                 snd_soc_dapm_stream_event(rtd,
 287                                           SNDRV_PCM_STREAM_CAPTURE,
 288                                           SND_SOC_DAPM_STREAM_STOP);
 289         }
 290
 291         mutex_unlock(&rtd->card->pcm_mutex);
 292         return 0;
 293 }
 294
 295 static int soc_compr_free_fe(struct snd_compr_stream *cstream)
 296 {
 297         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 298         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 299         struct snd_soc_dpcm *dpcm;
 300         int stream, ret;
 301
 302         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 303
 304         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 305                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 306         else
 307                 stream = SNDRV_PCM_STREAM_CAPTURE;
 308
 309         snd_soc_runtime_deactivate(fe, stream);
 310
 311         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 312
 313         ret = dpcm_be_dai_hw_free(fe, stream);
 314         if (ret < 0)
 315                 dev_err(fe->dev, "Compressed ASoC: hw_free failed: %d\n", ret);
 316
 317         ret = dpcm_be_dai_shutdown(fe, stream);
 318
 319         /* mark FE's links ready to prune */
 320         for_each_dpcm_be(fe, stream, dpcm)
 321                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
 322
 323         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
 324
 325         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
 326         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 327
 328         dpcm_be_disconnect(fe, stream);
 329
 330         fe->dpcm[stream].runtime = NULL;
 331
 332         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
 333                 fe->dai_link->compr_ops->shutdown(cstream);
 334
 335         soc_compr_components_free(cstream, NULL);
 336
 337         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
 338                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
 339
 340         mutex_unlock(&fe->card->mutex);
 341         return 0;
 342 }
 343
 344 static int soc_compr_components_trigger(struct snd_compr_stream *cstream,
 345                                         int cmd)
 346 {
 347         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 348         struct snd_soc_component *component;
 349         struct snd_soc_rtdcom_list *rtdcom;
 350         int ret;
 351
 352         for_each_rtd_components(rtd, rtdcom, component) {
 353                 if (!component->driver->compr_ops ||
 354                     !component->driver->compr_ops->trigger)
 355                         continue;
 356
 357                 ret = component->driver->compr_ops->trigger(cstream, cmd);
 358                 if (ret < 0)
 359                         return ret;
 360         }
 361
 362         return 0;
 363 }
 364
 365 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 366 {
 367         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 368         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 369         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 370         int ret;
 371
 372         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 373
 374         ret = soc_compr_components_trigger(cstream, cmd);
 375         if (ret < 0)
 376                 goto out;
 377
 378         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger)
 379                 cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
 380
 381         switch (cmd) {
 382         case SNDRV_PCM_TRIGGER_START:
 383                 snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
 384                 break;
 385         case SNDRV_PCM_TRIGGER_STOP:
 386                 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
 387                 break;
 388         }
 389
 390 out:
 391         mutex_unlock(&rtd->card->pcm_mutex);
 392         return ret;
 393 }
 394
 395 static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
 396 {
 397         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 398         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 399         int ret, stream;
 400
 401         if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
 402             cmd == SND_COMPR_TRIGGER_DRAIN)
 403                 return soc_compr_components_trigger(cstream, cmd);
 404
 405         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 406                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 407         else
 408                 stream = SNDRV_PCM_STREAM_CAPTURE;
 409
 410         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 411
 412         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger) {
 413                 ret = cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
 414                 if (ret < 0)
 415                         goto out;
 416         }
 417
 418         ret = soc_compr_components_trigger(cstream, cmd);
 419         if (ret < 0)
 420                 goto out;
 421
 422         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 423
 424         ret = dpcm_be_dai_trigger(fe, stream, cmd);
 425
 426         switch (cmd) {
 427         case SNDRV_PCM_TRIGGER_START:
 428         case SNDRV_PCM_TRIGGER_RESUME:
 429         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 430                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
 431                 break;
 432         case SNDRV_PCM_TRIGGER_STOP:
 433         case SNDRV_PCM_TRIGGER_SUSPEND:
 434                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
 435                 break;
 436         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 437                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
 438                 break;
 439         }
 440
 441 out:
 442         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 443         mutex_unlock(&fe->card->mutex);
 444         return ret;
 445 }
 446
 447 static int soc_compr_components_set_params(struct snd_compr_stream *cstream,
 448                                            struct snd_compr_params *params)
 449 {
 450         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 451         struct snd_soc_component *component;
 452         struct snd_soc_rtdcom_list *rtdcom;
 453         int ret;
 454
 455         for_each_rtd_components(rtd, rtdcom, component) {
 456                 if (!component->driver->compr_ops ||
 457                     !component->driver->compr_ops->set_params)
 458                         continue;
 459
 460                 ret = component->driver->compr_ops->set_params(cstream, params);
 461                 if (ret < 0)
 462                         return ret;
 463         }
 464
 465         return 0;
 466 }
 467
 468 static int soc_compr_set_params(struct snd_compr_stream *cstream,
 469                                 struct snd_compr_params *params)
 470 {
 471         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 472         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 473         int ret;
 474
 475         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 476
 477         /*
 478          * First we call set_params for the CPU DAI, then the component
 479          * driver this should configure the SoC side. If the machine has
 480          * compressed ops then we call that as well. The expectation is
 481          * that these callbacks will configure everything for this compress
 482          * path, like configuring a PCM port for a CODEC.
 483          */
 484         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
 485                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
 486                 if (ret < 0)
 487                         goto err;
 488         }
 489
 490         ret = soc_compr_components_set_params(cstream, params);
 491         if (ret < 0)
 492                 goto err;
 493
 494         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
 495                 ret = rtd->dai_link->compr_ops->set_params(cstream);
 496                 if (ret < 0)
 497                         goto err;
 498         }
 499
 500         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 501                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 502                                           SND_SOC_DAPM_STREAM_START);
 503         else
 504                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 505                                           SND_SOC_DAPM_STREAM_START);
 506
 507         /* cancel any delayed stream shutdown that is pending */
 508         rtd->pop_wait = 0;
 509         mutex_unlock(&rtd->card->pcm_mutex);
 510
 511         cancel_delayed_work_sync(&rtd->delayed_work);
 512
 513         return 0;
 514
 515 err:
 516         mutex_unlock(&rtd->card->pcm_mutex);
 517         return ret;
 518 }
 519
 520 static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
 521                                    struct snd_compr_params *params)
 522 {
 523         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 524         struct snd_pcm_substream *fe_substream =
 525                  fe->pcm->streams[cstream->direction].substream;
 526         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 527         int ret, stream;
 528
 529         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 530                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 531         else
 532                 stream = SNDRV_PCM_STREAM_CAPTURE;
 533
 534         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 535
 536         /*
 537          * Create an empty hw_params for the BE as the machine driver must
 538          * fix this up to match DSP decoder and ASRC configuration.
 539          * I.e. machine driver fixup for compressed BE is mandatory.
 540          */
 541         memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
 542                 sizeof(struct snd_pcm_hw_params));
 543
 544         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 545
 546         ret = dpcm_be_dai_hw_params(fe, stream);
 547         if (ret < 0)
 548                 goto out;
 549
 550         ret = dpcm_be_dai_prepare(fe, stream);
 551         if (ret < 0)
 552                 goto out;
 553
 554         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
 555                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
 556                 if (ret < 0)
 557                         goto out;
 558         }
 559
 560         ret = soc_compr_components_set_params(cstream, params);
 561         if (ret < 0)
 562                 goto out;
 563
 564         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
 565                 ret = fe->dai_link->compr_ops->set_params(cstream);
 566                 if (ret < 0)
 567                         goto out;
 568         }
 569
 570         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
 571         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
 572
 573 out:
 574         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 575         mutex_unlock(&fe->card->mutex);
 576         return ret;
 577 }
 578
 579 static int soc_compr_get_params(struct snd_compr_stream *cstream,
 580                                 struct snd_codec *params)
 581 {
 582         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 583         struct snd_soc_component *component;
 584         struct snd_soc_rtdcom_list *rtdcom;
 585         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 586         int ret = 0;
 587
 588         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 589
 590         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_params) {
 591                 ret = cpu_dai->driver->cops->get_params(cstream, params, cpu_dai);
 592                 if (ret < 0)
 593                         goto err;
 594         }
 595
 596         for_each_rtd_components(rtd, rtdcom, component) {
 597                 if (!component->driver->compr_ops ||
 598                     !component->driver->compr_ops->get_params)
 599                         continue;
 600
 601                 ret = component->driver->compr_ops->get_params(cstream, params);
 602                 break;
 603         }
 604
 605 err:
 606         mutex_unlock(&rtd->card->pcm_mutex);
 607         return ret;
 608 }
 609
 610 static int soc_compr_get_caps(struct snd_compr_stream *cstream,
 611                               struct snd_compr_caps *caps)
 612 {
 613         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 614         struct snd_soc_component *component;
 615         struct snd_soc_rtdcom_list *rtdcom;
 616         int ret = 0;
 617
 618         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 619
 620         for_each_rtd_components(rtd, rtdcom, component) {
 621                 if (!component->driver->compr_ops ||
 622                     !component->driver->compr_ops->get_caps)
 623                         continue;
 624
 625                 ret = component->driver->compr_ops->get_caps(cstream, caps);
 626                 break;
 627         }
 628
 629         mutex_unlock(&rtd->card->pcm_mutex);
 630         return ret;
 631 }
 632
 633 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
 634                                     struct snd_compr_codec_caps *codec)
 635 {
 636         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 637         struct snd_soc_component *component;
 638         struct snd_soc_rtdcom_list *rtdcom;
 639         int ret = 0;
 640
 641         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 642
 643         for_each_rtd_components(rtd, rtdcom, component) {
 644                 if (!component->driver->compr_ops ||
 645                     !component->driver->compr_ops->get_codec_caps)
 646                         continue;
 647
 648                 ret = component->driver->compr_ops->get_codec_caps(cstream,
 649                                                                    codec);
 650                 break;
 651         }
 652
 653         mutex_unlock(&rtd->card->pcm_mutex);
 654         return ret;
 655 }
 656
 657 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
 658 {
 659         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 660         struct snd_soc_component *component;
 661         struct snd_soc_rtdcom_list *rtdcom;
 662         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 663         int ret = 0;
 664
 665         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 666
 667         if (cpu_dai->driver->cops && cpu_dai->driver->cops->ack) {
 668                 ret = cpu_dai->driver->cops->ack(cstream, bytes, cpu_dai);
 669                 if (ret < 0)
 670                         goto err;
 671         }
 672
 673         for_each_rtd_components(rtd, rtdcom, component) {
 674                 if (!component->driver->compr_ops ||
 675                     !component->driver->compr_ops->ack)
 676                         continue;
 677
 678                 ret = component->driver->compr_ops->ack(cstream, bytes);
 679                 if (ret < 0)
 680                         goto err;
 681         }
 682
 683 err:
 684         mutex_unlock(&rtd->card->pcm_mutex);
 685         return ret;
 686 }
 687
 688 static int soc_compr_pointer(struct snd_compr_stream *cstream,
 689                              struct snd_compr_tstamp *tstamp)
 690 {
 691         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 692         struct snd_soc_component *component;
 693         struct snd_soc_rtdcom_list *rtdcom;
 694         int ret = 0;
 695         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 696
 697         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 698
 699         if (cpu_dai->driver->cops && cpu_dai->driver->cops->pointer)
 700                 cpu_dai->driver->cops->pointer(cstream, tstamp, cpu_dai);
 701
 702         for_each_rtd_components(rtd, rtdcom, component) {
 703                 if (!component->driver->compr_ops ||
 704                     !component->driver->compr_ops->pointer)
 705                         continue;
 706
 707                 ret = component->driver->compr_ops->pointer(cstream, tstamp);
 708                 break;
 709         }
 710
 711         mutex_unlock(&rtd->card->pcm_mutex);
 712         return ret;
 713 }
 714
 715 static int soc_compr_copy(struct snd_compr_stream *cstream,
 716                           char __user *buf, size_t count)
 717 {
 718         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 719         struct snd_soc_component *component;
 720         struct snd_soc_rtdcom_list *rtdcom;
 721         int ret = 0;
 722
 723         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 724
 725         for_each_rtd_components(rtd, rtdcom, component) {
 726                 if (!component->driver->compr_ops ||
 727                     !component->driver->compr_ops->copy)
 728                         continue;
 729
 730                 ret = component->driver->compr_ops->copy(cstream, buf, count);
 731                 break;
 732         }
 733
 734         mutex_unlock(&rtd->card->pcm_mutex);
 735         return ret;
 736 }
 737
 738 static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
 739                                   struct snd_compr_metadata *metadata)
 740 {
 741         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 742         struct snd_soc_component *component;
 743         struct snd_soc_rtdcom_list *rtdcom;
 744         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 745         int ret;
 746
 747         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_metadata) {
 748                 ret = cpu_dai->driver->cops->set_metadata(cstream, metadata, cpu_dai);
 749                 if (ret < 0)
 750                         return ret;
 751         }
 752
 753         for_each_rtd_components(rtd, rtdcom, component) {
 754                 if (!component->driver->compr_ops ||
 755                     !component->driver->compr_ops->set_metadata)
 756                         continue;
 757
 758                 ret = component->driver->compr_ops->set_metadata(cstream,
 759                                                                  metadata);
 760                 if (ret < 0)
 761                         return ret;
 762         }
 763
 764         return 0;
 765 }
 766
 767 static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
 768                                   struct snd_compr_metadata *metadata)
 769 {
 770         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 771         struct snd_soc_component *component;
 772         struct snd_soc_rtdcom_list *rtdcom;
 773         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 774         int ret;
 775
 776         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_metadata) {
 777                 ret = cpu_dai->driver->cops->get_metadata(cstream, metadata, cpu_dai);
 778                 if (ret < 0)
 779                         return ret;
 780         }
 781
 782         for_each_rtd_components(rtd, rtdcom, component) {
 783                 if (!component->driver->compr_ops ||
 784                     !component->driver->compr_ops->get_metadata)
 785                         continue;
 786
 787                 return component->driver->compr_ops->get_metadata(cstream,
 788                                                                   metadata);
 789         }
 790
 791         return 0;
 792 }
 793
 794 /* ASoC Compress operations */
 795 static struct snd_compr_ops soc_compr_ops = {
 796         .open           = soc_compr_open,
 797         .free           = soc_compr_free,
 798         .set_params     = soc_compr_set_params,
 799         .set_metadata   = soc_compr_set_metadata,
 800         .get_metadata   = soc_compr_get_metadata,
 801         .get_params     = soc_compr_get_params,
 802         .trigger        = soc_compr_trigger,
 803         .pointer        = soc_compr_pointer,
 804         .ack            = soc_compr_ack,
 805         .get_caps       = soc_compr_get_caps,
 806         .get_codec_caps = soc_compr_get_codec_caps
 807 };
 808
 809 /* ASoC Dynamic Compress operations */
 810 static struct snd_compr_ops soc_compr_dyn_ops = {
 811         .open           = soc_compr_open_fe,
 812         .free           = soc_compr_free_fe,
 813         .set_params     = soc_compr_set_params_fe,
 814         .get_params     = soc_compr_get_params,
 815         .set_metadata   = soc_compr_set_metadata,
 816         .get_metadata   = soc_compr_get_metadata,
 817         .trigger        = soc_compr_trigger_fe,
 818         .pointer        = soc_compr_pointer,
 819         .ack            = soc_compr_ack,
 820         .get_caps       = soc_compr_get_caps,
 821         .get_codec_caps = soc_compr_get_codec_caps
 822 };
 823
 824 /**
 825  * snd_soc_new_compress - create a new compress.
 826  *
 827  * @rtd: The runtime for which we will create compress
 828  * @num: the device index number (zero based - shared with normal PCMs)
 829  *
 830  * Return: 0 for success, else error.
 831  */
 832 int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 833 {
 834         struct snd_soc_component *component;
 835         struct snd_soc_rtdcom_list *rtdcom;
 836         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 837         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 838         struct snd_compr *compr;
 839         struct snd_pcm *be_pcm;
 840         char new_name[64];
 841         int ret = 0, direction = 0;
 842         int playback = 0, capture = 0;
 843
 844         if (rtd->num_codecs > 1) {
 845                 dev_err(rtd->card->dev,
 846                         "Compress ASoC: Multicodec not supported\n");
 847                 return -EINVAL;
 848         }
 849
 850         /* check client and interface hw capabilities */
 851         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
 852             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
 853                 playback = 1;
 854         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
 855             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
 856                 capture = 1;
 857
 858         /*
 859          * Compress devices are unidirectional so only one of the directions
 860          * should be set, check for that (xor)
 861          */
 862         if (playback + capture != 1) {
 863                 dev_err(rtd->card->dev,
 864                         "Compress ASoC: Invalid direction for P %d, C %d\n",
 865                         playback, capture);
 866                 return -EINVAL;
 867         }
 868
 869         if (playback)
 870                 direction = SND_COMPRESS_PLAYBACK;
 871         else
 872                 direction = SND_COMPRESS_CAPTURE;
 873
 874         compr = devm_kzalloc(rtd->card->dev, sizeof(*compr), GFP_KERNEL);
 875         if (!compr)
 876                 return -ENOMEM;
 877
 878         compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
 879                                   GFP_KERNEL);
 880         if (!compr->ops)
 881                 return -ENOMEM;
 882
 883         if (rtd->dai_link->dynamic) {
 884                 snprintf(new_name, sizeof(new_name), "(%s)",
 885                         rtd->dai_link->stream_name);
 886
 887                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
 888                                 rtd->dai_link->dpcm_playback,
 889                                 rtd->dai_link->dpcm_capture, &be_pcm);
 890                 if (ret < 0) {
 891                         dev_err(rtd->card->dev,
 892                                 "Compress ASoC: can't create compressed for %s: %d\n",
 893                                 rtd->dai_link->name, ret);
 894                         return ret;
 895                 }
 896
 897                 rtd->pcm = be_pcm;
 898                 rtd->fe_compr = 1;
 899                 if (rtd->dai_link->dpcm_playback)
 900                         be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
 901                 else if (rtd->dai_link->dpcm_capture)
 902                         be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
 903                 memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
 904         } else {
 905                 snprintf(new_name, sizeof(new_name), "%s %s-%d",
 906                         rtd->dai_link->stream_name, codec_dai->name, num);
 907
 908                 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
 909         }
 910
 911         for_each_rtd_components(rtd, rtdcom, component) {
 912                 if (!component->driver->compr_ops ||
 913                     !component->driver->compr_ops->copy)
 914                         continue;
 915
 916                 compr->ops->copy = soc_compr_copy;
 917                 break;
 918         }
 919
 920         mutex_init(&compr->lock);
 921         ret = snd_compress_new(rtd->card->snd_card, num, direction,
 922                                 new_name, compr);
 923         if (ret < 0) {
 924                 component = rtd->codec_dai->component;
 925                 dev_err(component->dev,
 926                         "Compress ASoC: can't create compress for codec %s: %d\n",
 927                         component->name, ret);
 928                 return ret;
 929         }
 930
 931         /* DAPM dai link stream work */
 932         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
 933
 934         rtd->compr = compr;
 935         compr->private_data = rtd;
 936
 937         dev_info(rtd->card->dev, "Compress ASoC: %s <-> %s mapping ok\n",
 938                  codec_dai->name, cpu_dai->name);
 939
 940         return 0;
 941 }
 942 EXPORT_SYMBOL_GPL(snd_soc_new_compress);