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_rtdcom(rtd, rtdcom) {
  32                 component = rtdcom->component;
  33
  34                 if (!component->driver->compr_ops ||
  35                     !component->driver->compr_ops->open)
  36                         continue;
  37
  38                 ret = component->driver->compr_ops->open(cstream);
  39                 if (ret < 0) {
  40                         dev_err(component->dev,
  41                                 "Compress ASoC: can't open platform %s: %d\n",
  42                                 component->name, ret);
  43
  44                         *last = component;
  45                         return ret;
  46                 }
  47         }
  48
  49         *last = NULL;
  50         return 0;
  51 }
  52
  53 static int soc_compr_components_free(struct snd_compr_stream *cstream,
  54                                      struct snd_soc_component *last)
  55 {
  56         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
  57         struct snd_soc_component *component;
  58         struct snd_soc_rtdcom_list *rtdcom;
  59
  60         for_each_rtdcom(rtd, rtdcom) {
  61                 component = rtdcom->component;
  62
  63                 if (component == last)
  64                         break;
  65
  66                 if (!component->driver->compr_ops ||
  67                     !component->driver->compr_ops->free)
  68                         continue;
  69
  70                 component->driver->compr_ops->free(cstream);
  71         }
  72
  73         return 0;
  74 }
  75
  76 static int soc_compr_open(struct snd_compr_stream *cstream)
  77 {
  78         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
  79         struct snd_soc_component *component;
  80         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  81         int ret;
  82
  83         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  84
  85         if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
  86                 ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
  87                 if (ret < 0) {
  88                         dev_err(cpu_dai->dev,
  89                                 "Compress ASoC: can't open interface %s: %d\n",
  90                                 cpu_dai->name, ret);
  91                         goto out;
  92                 }
  93         }
  94
  95         ret = soc_compr_components_open(cstream, &component);
  96         if (ret < 0)
  97                 goto machine_err;
  98
  99         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
 100                 ret = rtd->dai_link->compr_ops->startup(cstream);
 101                 if (ret < 0) {
 102                         dev_err(rtd->dev,
 103                                 "Compress ASoC: %s startup failed: %d\n",
 104                                 rtd->dai_link->name, ret);
 105                         goto machine_err;
 106                 }
 107         }
 108
 109         snd_soc_runtime_activate(rtd, cstream->direction);
 110
 111         mutex_unlock(&rtd->pcm_mutex);
 112
 113         return 0;
 114
 115 machine_err:
 116         soc_compr_components_free(cstream, component);
 117
 118         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
 119                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
 120 out:
 121         mutex_unlock(&rtd->pcm_mutex);
 122         return ret;
 123 }
 124
 125 static int soc_compr_open_fe(struct snd_compr_stream *cstream)
 126 {
 127         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 128         struct snd_pcm_substream *fe_substream =
 129                  fe->pcm->streams[cstream->direction].substream;
 130         struct snd_soc_component *component;
 131         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 132         struct snd_soc_dpcm *dpcm;
 133         struct snd_soc_dapm_widget_list *list;
 134         int stream;
 135         int ret;
 136
 137         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 138                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 139         else
 140                 stream = SNDRV_PCM_STREAM_CAPTURE;
 141
 142         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 143         fe->dpcm[stream].runtime = fe_substream->runtime;
 144
 145         ret = dpcm_path_get(fe, stream, &list);
 146         if (ret < 0)
 147                 goto be_err;
 148         else if (ret == 0)
 149                 dev_dbg(fe->dev, "Compress ASoC: %s no valid %s route\n",
 150                         fe->dai_link->name, stream ? "capture" : "playback");
 151         /* calculate valid and active FE <-> BE dpcms */
 152         dpcm_process_paths(fe, stream, &list, 1);
 153         fe->dpcm[stream].runtime = fe_substream->runtime;
 154
 155         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 156
 157         ret = dpcm_be_dai_startup(fe, stream);
 158         if (ret < 0) {
 159                 /* clean up all links */
 160                 for_each_dpcm_be(fe, stream, dpcm)
 161                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
 162
 163                 dpcm_be_disconnect(fe, stream);
 164                 fe->dpcm[stream].runtime = NULL;
 165                 goto out;
 166         }
 167
 168         if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
 169                 ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
 170                 if (ret < 0) {
 171                         dev_err(cpu_dai->dev,
 172                                 "Compress ASoC: can't open interface %s: %d\n",
 173                                 cpu_dai->name, ret);
 174                         goto out;
 175                 }
 176         }
 177
 178         ret = soc_compr_components_open(cstream, &component);
 179         if (ret < 0)
 180                 goto open_err;
 181
 182         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) {
 183                 ret = fe->dai_link->compr_ops->startup(cstream);
 184                 if (ret < 0) {
 185                         pr_err("Compress ASoC: %s startup failed: %d\n",
 186                                fe->dai_link->name, ret);
 187                         goto machine_err;
 188                 }
 189         }
 190
 191         dpcm_clear_pending_state(fe, stream);
 192         dpcm_path_put(&list);
 193
 194         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
 195         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 196
 197         snd_soc_runtime_activate(fe, stream);
 198
 199         mutex_unlock(&fe->card->mutex);
 200
 201         return 0;
 202
 203 machine_err:
 204         soc_compr_components_free(cstream, component);
 205 open_err:
 206         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
 207                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
 208 out:
 209         dpcm_path_put(&list);
 210 be_err:
 211         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 212         mutex_unlock(&fe->card->mutex);
 213         return ret;
 214 }
 215
 216 /*
 217  * Power down the audio subsystem pmdown_time msecs after close is called.
 218  * This is to ensure there are no pops or clicks in between any music tracks
 219  * due to DAPM power cycling.
 220  */
 221 static void close_delayed_work(struct work_struct *work)
 222 {
 223         struct snd_soc_pcm_runtime *rtd =
 224                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 225         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 226
 227         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 228
 229         dev_dbg(rtd->dev,
 230                 "Compress ASoC: pop wq checking: %s status: %s waiting: %s\n",
 231                 codec_dai->driver->playback.stream_name,
 232                 codec_dai->playback_active ? "active" : "inactive",
 233                 rtd->pop_wait ? "yes" : "no");
 234
 235         /* are we waiting on this codec DAI stream */
 236         if (rtd->pop_wait == 1) {
 237                 rtd->pop_wait = 0;
 238                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 239                                           SND_SOC_DAPM_STREAM_STOP);
 240         }
 241
 242         mutex_unlock(&rtd->pcm_mutex);
 243 }
 244
 245 static int soc_compr_free(struct snd_compr_stream *cstream)
 246 {
 247         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 248         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 249         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 250         int stream;
 251
 252         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 253
 254         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 255                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 256         else
 257                 stream = SNDRV_PCM_STREAM_CAPTURE;
 258
 259         snd_soc_runtime_deactivate(rtd, stream);
 260
 261         snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
 262
 263         if (!cpu_dai->active)
 264                 cpu_dai->rate = 0;
 265
 266         if (!codec_dai->active)
 267                 codec_dai->rate = 0;
 268
 269         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
 270                 rtd->dai_link->compr_ops->shutdown(cstream);
 271
 272         soc_compr_components_free(cstream, NULL);
 273
 274         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
 275                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
 276
 277         if (cstream->direction == SND_COMPRESS_PLAYBACK) {
 278                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 279                         snd_soc_dapm_stream_event(rtd,
 280                                                   SNDRV_PCM_STREAM_PLAYBACK,
 281                                                   SND_SOC_DAPM_STREAM_STOP);
 282                 } else {
 283                         rtd->pop_wait = 1;
 284                         queue_delayed_work(system_power_efficient_wq,
 285                                            &rtd->delayed_work,
 286                                            msecs_to_jiffies(rtd->pmdown_time));
 287                 }
 288         } else {
 289                 /* capture streams can be powered down now */
 290                 snd_soc_dapm_stream_event(rtd,
 291                                           SNDRV_PCM_STREAM_CAPTURE,
 292                                           SND_SOC_DAPM_STREAM_STOP);
 293         }
 294
 295         mutex_unlock(&rtd->pcm_mutex);
 296         return 0;
 297 }
 298
 299 static int soc_compr_free_fe(struct snd_compr_stream *cstream)
 300 {
 301         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 302         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 303         struct snd_soc_dpcm *dpcm;
 304         int stream, ret;
 305
 306         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 307
 308         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 309                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 310         else
 311                 stream = SNDRV_PCM_STREAM_CAPTURE;
 312
 313         snd_soc_runtime_deactivate(fe, stream);
 314
 315         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 316
 317         ret = dpcm_be_dai_hw_free(fe, stream);
 318         if (ret < 0)
 319                 dev_err(fe->dev, "Compressed ASoC: hw_free failed: %d\n", ret);
 320
 321         ret = dpcm_be_dai_shutdown(fe, stream);
 322
 323         /* mark FE's links ready to prune */
 324         for_each_dpcm_be(fe, stream, dpcm)
 325                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
 326
 327         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
 328
 329         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
 330         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 331
 332         dpcm_be_disconnect(fe, stream);
 333
 334         fe->dpcm[stream].runtime = NULL;
 335
 336         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
 337                 fe->dai_link->compr_ops->shutdown(cstream);
 338
 339         soc_compr_components_free(cstream, NULL);
 340
 341         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
 342                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
 343
 344         mutex_unlock(&fe->card->mutex);
 345         return 0;
 346 }
 347
 348 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 349 {
 350
 351         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 352         struct snd_soc_component *component;
 353         struct snd_soc_rtdcom_list *rtdcom;
 354         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 355         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 356         int ret = 0;
 357
 358         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 359
 360         for_each_rtdcom(rtd, rtdcom) {
 361                 component = rtdcom->component;
 362
 363                 if (!component->driver->compr_ops ||
 364                     !component->driver->compr_ops->trigger)
 365                         continue;
 366
 367                 ret = component->driver->compr_ops->trigger(cstream, cmd);
 368                 if (ret < 0)
 369                         goto out;
 370         }
 371
 372         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger)
 373                 cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
 374
 375         switch (cmd) {
 376         case SNDRV_PCM_TRIGGER_START:
 377                 snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
 378                 break;
 379         case SNDRV_PCM_TRIGGER_STOP:
 380                 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
 381                 break;
 382         }
 383
 384 out:
 385         mutex_unlock(&rtd->pcm_mutex);
 386         return ret;
 387 }
 388
 389 static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
 390 {
 391         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 392         struct snd_soc_component *component;
 393         struct snd_soc_rtdcom_list *rtdcom;
 394         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 395         int ret, stream;
 396
 397         if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
 398                 cmd == SND_COMPR_TRIGGER_DRAIN) {
 399
 400                 for_each_rtdcom(fe, rtdcom) {
 401                         component = rtdcom->component;
 402
 403                         if (!component->driver->compr_ops ||
 404                             !component->driver->compr_ops->trigger)
 405                                 continue;
 406
 407                         ret = component->driver->compr_ops->trigger(cstream,
 408                                                                     cmd);
 409                         if (ret < 0)
 410                                 return ret;
 411                 }
 412                 return ret;
 413         }
 414
 415         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 416                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 417         else
 418                 stream = SNDRV_PCM_STREAM_CAPTURE;
 419
 420         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 421
 422         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger) {
 423                 ret = cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
 424                 if (ret < 0)
 425                         goto out;
 426         }
 427
 428         for_each_rtdcom(fe, rtdcom) {
 429                 component = rtdcom->component;
 430
 431                 if (!component->driver->compr_ops ||
 432                     !component->driver->compr_ops->trigger)
 433                         continue;
 434
 435                 ret = component->driver->compr_ops->trigger(cstream, cmd);
 436                 if (ret < 0)
 437                         goto out;
 438         }
 439
 440         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 441
 442         ret = dpcm_be_dai_trigger(fe, stream, cmd);
 443
 444         switch (cmd) {
 445         case SNDRV_PCM_TRIGGER_START:
 446         case SNDRV_PCM_TRIGGER_RESUME:
 447         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 448                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
 449                 break;
 450         case SNDRV_PCM_TRIGGER_STOP:
 451         case SNDRV_PCM_TRIGGER_SUSPEND:
 452                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
 453                 break;
 454         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 455                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
 456                 break;
 457         }
 458
 459 out:
 460         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 461         mutex_unlock(&fe->card->mutex);
 462         return ret;
 463 }
 464
 465 static int soc_compr_set_params(struct snd_compr_stream *cstream,
 466                                         struct snd_compr_params *params)
 467 {
 468         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 469         struct snd_soc_component *component;
 470         struct snd_soc_rtdcom_list *rtdcom;
 471         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 472         int ret;
 473
 474         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 475
 476         /*
 477          * First we call set_params for the CPU DAI, then the component
 478          * driver this should configure the SoC side. If the machine has
 479          * compressed ops then we call that as well. The expectation is
 480          * that these callbacks will configure everything for this compress
 481          * path, like configuring a PCM port for a CODEC.
 482          */
 483         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
 484                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
 485                 if (ret < 0)
 486                         goto err;
 487         }
 488
 489         for_each_rtdcom(rtd, rtdcom) {
 490                 component = rtdcom->component;
 491
 492                 if (!component->driver->compr_ops ||
 493                     !component->driver->compr_ops->set_params)
 494                         continue;
 495
 496                 ret = component->driver->compr_ops->set_params(cstream, params);
 497                 if (ret < 0)
 498                         goto err;
 499         }
 500
 501         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
 502                 ret = rtd->dai_link->compr_ops->set_params(cstream);
 503                 if (ret < 0)
 504                         goto err;
 505         }
 506
 507         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 508                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 509                                           SND_SOC_DAPM_STREAM_START);
 510         else
 511                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 512                                           SND_SOC_DAPM_STREAM_START);
 513
 514         /* cancel any delayed stream shutdown that is pending */
 515         rtd->pop_wait = 0;
 516         mutex_unlock(&rtd->pcm_mutex);
 517
 518         cancel_delayed_work_sync(&rtd->delayed_work);
 519
 520         return 0;
 521
 522 err:
 523         mutex_unlock(&rtd->pcm_mutex);
 524         return ret;
 525 }
 526
 527 static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
 528                                    struct snd_compr_params *params)
 529 {
 530         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 531         struct snd_pcm_substream *fe_substream =
 532                  fe->pcm->streams[cstream->direction].substream;
 533         struct snd_soc_component *component;
 534         struct snd_soc_rtdcom_list *rtdcom;
 535         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 536         int ret, stream;
 537
 538         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 539                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 540         else
 541                 stream = SNDRV_PCM_STREAM_CAPTURE;
 542
 543         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 544
 545         /*
 546          * Create an empty hw_params for the BE as the machine driver must
 547          * fix this up to match DSP decoder and ASRC configuration.
 548          * I.e. machine driver fixup for compressed BE is mandatory.
 549          */
 550         memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
 551                 sizeof(struct snd_pcm_hw_params));
 552
 553         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 554
 555         ret = dpcm_be_dai_hw_params(fe, stream);
 556         if (ret < 0)
 557                 goto out;
 558
 559         ret = dpcm_be_dai_prepare(fe, stream);
 560         if (ret < 0)
 561                 goto out;
 562
 563         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
 564                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
 565                 if (ret < 0)
 566                         goto out;
 567         }
 568
 569         for_each_rtdcom(fe, rtdcom) {
 570                 component = rtdcom->component;
 571
 572                 if (!component->driver->compr_ops ||
 573                     !component->driver->compr_ops->set_params)
 574                         continue;
 575
 576                 ret = component->driver->compr_ops->set_params(cstream, params);
 577                 if (ret < 0)
 578                         goto out;
 579         }
 580
 581         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
 582                 ret = fe->dai_link->compr_ops->set_params(cstream);
 583                 if (ret < 0)
 584                         goto out;
 585         }
 586
 587         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
 588         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
 589
 590 out:
 591         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 592         mutex_unlock(&fe->card->mutex);
 593         return ret;
 594 }
 595
 596 static int soc_compr_get_params(struct snd_compr_stream *cstream,
 597                                 struct snd_codec *params)
 598 {
 599         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 600         struct snd_soc_component *component;
 601         struct snd_soc_rtdcom_list *rtdcom;
 602         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 603         int ret = 0;
 604
 605         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 606
 607         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_params) {
 608                 ret = cpu_dai->driver->cops->get_params(cstream, params, cpu_dai);
 609                 if (ret < 0)
 610                         goto err;
 611         }
 612
 613         for_each_rtdcom(rtd, rtdcom) {
 614                 component = rtdcom->component;
 615
 616                 if (!component->driver->compr_ops ||
 617                     !component->driver->compr_ops->get_params)
 618                         continue;
 619
 620                 ret = component->driver->compr_ops->get_params(cstream, params);
 621                 break;
 622         }
 623
 624 err:
 625         mutex_unlock(&rtd->pcm_mutex);
 626         return ret;
 627 }
 628
 629 static int soc_compr_get_caps(struct snd_compr_stream *cstream,
 630                               struct snd_compr_caps *caps)
 631 {
 632         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 633         struct snd_soc_component *component;
 634         struct snd_soc_rtdcom_list *rtdcom;
 635         int ret = 0;
 636
 637         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 638
 639         for_each_rtdcom(rtd, rtdcom) {
 640                 component = rtdcom->component;
 641
 642                 if (!component->driver->compr_ops ||
 643                     !component->driver->compr_ops->get_caps)
 644                         continue;
 645
 646                 ret = component->driver->compr_ops->get_caps(cstream, caps);
 647                 break;
 648         }
 649
 650         mutex_unlock(&rtd->pcm_mutex);
 651         return ret;
 652 }
 653
 654 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
 655                                     struct snd_compr_codec_caps *codec)
 656 {
 657         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 658         struct snd_soc_component *component;
 659         struct snd_soc_rtdcom_list *rtdcom;
 660         int ret = 0;
 661
 662         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 663
 664         for_each_rtdcom(rtd, rtdcom) {
 665                 component = rtdcom->component;
 666
 667                 if (!component->driver->compr_ops ||
 668                     !component->driver->compr_ops->get_codec_caps)
 669                         continue;
 670
 671                 ret = component->driver->compr_ops->get_codec_caps(cstream,
 672                                                                    codec);
 673                 break;
 674         }
 675
 676         mutex_unlock(&rtd->pcm_mutex);
 677         return ret;
 678 }
 679
 680 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
 681 {
 682         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 683         struct snd_soc_component *component;
 684         struct snd_soc_rtdcom_list *rtdcom;
 685         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 686         int ret = 0;
 687
 688         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 689
 690         if (cpu_dai->driver->cops && cpu_dai->driver->cops->ack) {
 691                 ret = cpu_dai->driver->cops->ack(cstream, bytes, cpu_dai);
 692                 if (ret < 0)
 693                         goto err;
 694         }
 695
 696         for_each_rtdcom(rtd, rtdcom) {
 697                 component = rtdcom->component;
 698
 699                 if (!component->driver->compr_ops ||
 700                     !component->driver->compr_ops->ack)
 701                         continue;
 702
 703                 ret = component->driver->compr_ops->ack(cstream, bytes);
 704                 if (ret < 0)
 705                         goto err;
 706         }
 707
 708 err:
 709         mutex_unlock(&rtd->pcm_mutex);
 710         return ret;
 711 }
 712
 713 static int soc_compr_pointer(struct snd_compr_stream *cstream,
 714                              struct snd_compr_tstamp *tstamp)
 715 {
 716         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 717         struct snd_soc_component *component;
 718         struct snd_soc_rtdcom_list *rtdcom;
 719         int ret = 0;
 720         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 721
 722         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 723
 724         if (cpu_dai->driver->cops && cpu_dai->driver->cops->pointer)
 725                 cpu_dai->driver->cops->pointer(cstream, tstamp, cpu_dai);
 726
 727         for_each_rtdcom(rtd, rtdcom) {
 728                 component = rtdcom->component;
 729
 730                 if (!component->driver->compr_ops ||
 731                     !component->driver->compr_ops->pointer)
 732                         continue;
 733
 734                 ret = component->driver->compr_ops->pointer(cstream, tstamp);
 735                 break;
 736         }
 737
 738         mutex_unlock(&rtd->pcm_mutex);
 739         return ret;
 740 }
 741
 742 static int soc_compr_copy(struct snd_compr_stream *cstream,
 743                           char __user *buf, size_t count)
 744 {
 745         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 746         struct snd_soc_component *component;
 747         struct snd_soc_rtdcom_list *rtdcom;
 748         int ret = 0;
 749
 750         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 751
 752         for_each_rtdcom(rtd, rtdcom) {
 753                 component = rtdcom->component;
 754
 755                 if (!component->driver->compr_ops ||
 756                     !component->driver->compr_ops->copy)
 757                         continue;
 758
 759                 ret = component->driver->compr_ops->copy(cstream, buf, count);
 760                 break;
 761         }
 762
 763         mutex_unlock(&rtd->pcm_mutex);
 764         return ret;
 765 }
 766
 767 static int soc_compr_set_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->set_metadata) {
 777                 ret = cpu_dai->driver->cops->set_metadata(cstream, metadata, cpu_dai);
 778                 if (ret < 0)
 779                         return ret;
 780         }
 781
 782         for_each_rtdcom(rtd, rtdcom) {
 783                 component = rtdcom->component;
 784
 785                 if (!component->driver->compr_ops ||
 786                     !component->driver->compr_ops->set_metadata)
 787                         continue;
 788
 789                 ret = component->driver->compr_ops->set_metadata(cstream,
 790                                                                  metadata);
 791                 if (ret < 0)
 792                         return ret;
 793         }
 794
 795         return 0;
 796 }
 797
 798 static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
 799                                   struct snd_compr_metadata *metadata)
 800 {
 801         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 802         struct snd_soc_component *component;
 803         struct snd_soc_rtdcom_list *rtdcom;
 804         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 805         int ret;
 806
 807         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_metadata) {
 808                 ret = cpu_dai->driver->cops->get_metadata(cstream, metadata, cpu_dai);
 809                 if (ret < 0)
 810                         return ret;
 811         }
 812
 813         for_each_rtdcom(rtd, rtdcom) {
 814                 component = rtdcom->component;
 815
 816                 if (!component->driver->compr_ops ||
 817                     !component->driver->compr_ops->get_metadata)
 818                         continue;
 819
 820                 return component->driver->compr_ops->get_metadata(cstream,
 821                                                                   metadata);
 822         }
 823
 824         return 0;
 825 }
 826
 827 /* ASoC Compress operations */
 828 static struct snd_compr_ops soc_compr_ops = {
 829         .open           = soc_compr_open,
 830         .free           = soc_compr_free,
 831         .set_params     = soc_compr_set_params,
 832         .set_metadata   = soc_compr_set_metadata,
 833         .get_metadata   = soc_compr_get_metadata,
 834         .get_params     = soc_compr_get_params,
 835         .trigger        = soc_compr_trigger,
 836         .pointer        = soc_compr_pointer,
 837         .ack            = soc_compr_ack,
 838         .get_caps       = soc_compr_get_caps,
 839         .get_codec_caps = soc_compr_get_codec_caps
 840 };
 841
 842 /* ASoC Dynamic Compress operations */
 843 static struct snd_compr_ops soc_compr_dyn_ops = {
 844         .open           = soc_compr_open_fe,
 845         .free           = soc_compr_free_fe,
 846         .set_params     = soc_compr_set_params_fe,
 847         .get_params     = soc_compr_get_params,
 848         .set_metadata   = soc_compr_set_metadata,
 849         .get_metadata   = soc_compr_get_metadata,
 850         .trigger        = soc_compr_trigger_fe,
 851         .pointer        = soc_compr_pointer,
 852         .ack            = soc_compr_ack,
 853         .get_caps       = soc_compr_get_caps,
 854         .get_codec_caps = soc_compr_get_codec_caps
 855 };
 856
 857 /**
 858  * snd_soc_new_compress - create a new compress.
 859  *
 860  * @rtd: The runtime for which we will create compress
 861  * @num: the device index number (zero based - shared with normal PCMs)
 862  *
 863  * Return: 0 for success, else error.
 864  */
 865 int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 866 {
 867         struct snd_soc_component *component;
 868         struct snd_soc_rtdcom_list *rtdcom;
 869         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 870         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 871         struct snd_compr *compr;
 872         struct snd_pcm *be_pcm;
 873         char new_name[64];
 874         int ret = 0, direction = 0;
 875         int playback = 0, capture = 0;
 876
 877         if (rtd->num_codecs > 1) {
 878                 dev_err(rtd->card->dev,
 879                         "Compress ASoC: Multicodec not supported\n");
 880                 return -EINVAL;
 881         }
 882
 883         /* check client and interface hw capabilities */
 884         if (codec_dai->driver->playback.channels_min)
 885                 playback = 1;
 886         if (codec_dai->driver->capture.channels_min)
 887                 capture = 1;
 888
 889         capture = capture && cpu_dai->driver->capture.channels_min;
 890         playback = playback && cpu_dai->driver->playback.channels_min;
 891
 892         /*
 893          * Compress devices are unidirectional so only one of the directions
 894          * should be set, check for that (xor)
 895          */
 896         if (playback + capture != 1) {
 897                 dev_err(rtd->card->dev,
 898                         "Compress ASoC: Invalid direction for P %d, C %d\n",
 899                         playback, capture);
 900                 return -EINVAL;
 901         }
 902
 903         if (playback)
 904                 direction = SND_COMPRESS_PLAYBACK;
 905         else
 906                 direction = SND_COMPRESS_CAPTURE;
 907
 908         compr = kzalloc(sizeof(*compr), GFP_KERNEL);
 909         if (!compr)
 910                 return -ENOMEM;
 911
 912         compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
 913                                   GFP_KERNEL);
 914         if (!compr->ops) {
 915                 ret = -ENOMEM;
 916                 goto compr_err;
 917         }
 918
 919         if (rtd->dai_link->dynamic) {
 920                 snprintf(new_name, sizeof(new_name), "(%s)",
 921                         rtd->dai_link->stream_name);
 922
 923                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
 924                                 rtd->dai_link->dpcm_playback,
 925                                 rtd->dai_link->dpcm_capture, &be_pcm);
 926                 if (ret < 0) {
 927                         dev_err(rtd->card->dev,
 928                                 "Compress ASoC: can't create compressed for %s: %d\n",
 929                                 rtd->dai_link->name, ret);
 930                         goto compr_err;
 931                 }
 932
 933                 rtd->pcm = be_pcm;
 934                 rtd->fe_compr = 1;
 935                 if (rtd->dai_link->dpcm_playback)
 936                         be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
 937                 else if (rtd->dai_link->dpcm_capture)
 938                         be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
 939                 memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
 940         } else {
 941                 snprintf(new_name, sizeof(new_name), "%s %s-%d",
 942                         rtd->dai_link->stream_name, codec_dai->name, num);
 943
 944                 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
 945         }
 946
 947         for_each_rtdcom(rtd, rtdcom) {
 948                 component = rtdcom->component;
 949
 950                 if (!component->driver->compr_ops ||
 951                     !component->driver->compr_ops->copy)
 952                         continue;
 953
 954                 compr->ops->copy = soc_compr_copy;
 955                 break;
 956         }
 957
 958         mutex_init(&compr->lock);
 959         ret = snd_compress_new(rtd->card->snd_card, num, direction,
 960                                 new_name, compr);
 961         if (ret < 0) {
 962                 component = rtd->codec_dai->component;
 963                 dev_err(component->dev,
 964                         "Compress ASoC: can't create compress for codec %s: %d\n",
 965                         component->name, ret);
 966                 goto compr_err;
 967         }
 968
 969         /* DAPM dai link stream work */
 970         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
 971
 972         rtd->compr = compr;
 973         compr->private_data = rtd;
 974
 975         dev_info(rtd->card->dev, "Compress ASoC: %s <-> %s mapping ok\n",
 976                  codec_dai->name, cpu_dai->name);
 977         return ret;
 978
 979 compr_err:
 980         kfree(compr);
 981         return ret;
 982 }
 983 EXPORT_SYMBOL_GPL(snd_soc_new_compress);