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_components_trigger(struct snd_compr_stream *cstream,
 349                                         int cmd)
 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         int ret;
 355
 356         for_each_rtdcom(rtd, rtdcom) {
 357                 component = rtdcom->component;
 358
 359                 if (!component->driver->compr_ops ||
 360                     !component->driver->compr_ops->trigger)
 361                         continue;
 362
 363                 ret = component->driver->compr_ops->trigger(cstream, cmd);
 364                 if (ret < 0)
 365                         return ret;
 366         }
 367
 368         return 0;
 369 }
 370
 371 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 372 {
 373         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 374         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 375         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 376         int ret;
 377
 378         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 379
 380         ret = soc_compr_components_trigger(cstream, cmd);
 381         if (ret < 0)
 382                 goto out;
 383
 384         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger)
 385                 cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
 386
 387         switch (cmd) {
 388         case SNDRV_PCM_TRIGGER_START:
 389                 snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
 390                 break;
 391         case SNDRV_PCM_TRIGGER_STOP:
 392                 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
 393                 break;
 394         }
 395
 396 out:
 397         mutex_unlock(&rtd->pcm_mutex);
 398         return ret;
 399 }
 400
 401 static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
 402 {
 403         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 404         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 405         int ret, stream;
 406
 407         if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
 408             cmd == SND_COMPR_TRIGGER_DRAIN)
 409                 return soc_compr_components_trigger(cstream, cmd);
 410
 411         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 412                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 413         else
 414                 stream = SNDRV_PCM_STREAM_CAPTURE;
 415
 416         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 417
 418         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger) {
 419                 ret = cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
 420                 if (ret < 0)
 421                         goto out;
 422         }
 423
 424         ret = soc_compr_components_trigger(cstream, cmd);
 425         if (ret < 0)
 426                 goto out;
 427
 428         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 429
 430         ret = dpcm_be_dai_trigger(fe, stream, cmd);
 431
 432         switch (cmd) {
 433         case SNDRV_PCM_TRIGGER_START:
 434         case SNDRV_PCM_TRIGGER_RESUME:
 435         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 436                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
 437                 break;
 438         case SNDRV_PCM_TRIGGER_STOP:
 439         case SNDRV_PCM_TRIGGER_SUSPEND:
 440                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
 441                 break;
 442         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 443                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
 444                 break;
 445         }
 446
 447 out:
 448         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 449         mutex_unlock(&fe->card->mutex);
 450         return ret;
 451 }
 452
 453 static int soc_compr_components_set_params(struct snd_compr_stream *cstream,
 454                                            struct snd_compr_params *params)
 455 {
 456         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 457         struct snd_soc_component *component;
 458         struct snd_soc_rtdcom_list *rtdcom;
 459         int ret;
 460
 461         for_each_rtdcom(rtd, rtdcom) {
 462                 component = rtdcom->component;
 463
 464                 if (!component->driver->compr_ops ||
 465                     !component->driver->compr_ops->set_params)
 466                         continue;
 467
 468                 ret = component->driver->compr_ops->set_params(cstream, params);
 469                 if (ret < 0)
 470                         return ret;
 471         }
 472
 473         return 0;
 474 }
 475
 476 static int soc_compr_set_params(struct snd_compr_stream *cstream,
 477                                 struct snd_compr_params *params)
 478 {
 479         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 480         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 481         int ret;
 482
 483         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 484
 485         /*
 486          * First we call set_params for the CPU DAI, then the component
 487          * driver this should configure the SoC side. If the machine has
 488          * compressed ops then we call that as well. The expectation is
 489          * that these callbacks will configure everything for this compress
 490          * path, like configuring a PCM port for a CODEC.
 491          */
 492         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
 493                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
 494                 if (ret < 0)
 495                         goto err;
 496         }
 497
 498         ret = soc_compr_components_set_params(cstream, params);
 499         if (ret < 0)
 500                 goto err;
 501
 502         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
 503                 ret = rtd->dai_link->compr_ops->set_params(cstream);
 504                 if (ret < 0)
 505                         goto err;
 506         }
 507
 508         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 509                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 510                                           SND_SOC_DAPM_STREAM_START);
 511         else
 512                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 513                                           SND_SOC_DAPM_STREAM_START);
 514
 515         /* cancel any delayed stream shutdown that is pending */
 516         rtd->pop_wait = 0;
 517         mutex_unlock(&rtd->pcm_mutex);
 518
 519         cancel_delayed_work_sync(&rtd->delayed_work);
 520
 521         return 0;
 522
 523 err:
 524         mutex_unlock(&rtd->pcm_mutex);
 525         return ret;
 526 }
 527
 528 static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
 529                                    struct snd_compr_params *params)
 530 {
 531         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 532         struct snd_pcm_substream *fe_substream =
 533                  fe->pcm->streams[cstream->direction].substream;
 534         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 535         int ret, stream;
 536
 537         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 538                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 539         else
 540                 stream = SNDRV_PCM_STREAM_CAPTURE;
 541
 542         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 543
 544         /*
 545          * Create an empty hw_params for the BE as the machine driver must
 546          * fix this up to match DSP decoder and ASRC configuration.
 547          * I.e. machine driver fixup for compressed BE is mandatory.
 548          */
 549         memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
 550                 sizeof(struct snd_pcm_hw_params));
 551
 552         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 553
 554         ret = dpcm_be_dai_hw_params(fe, stream);
 555         if (ret < 0)
 556                 goto out;
 557
 558         ret = dpcm_be_dai_prepare(fe, stream);
 559         if (ret < 0)
 560                 goto out;
 561
 562         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
 563                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
 564                 if (ret < 0)
 565                         goto out;
 566         }
 567
 568         ret = soc_compr_components_set_params(cstream, params);
 569         if (ret < 0)
 570                 goto out;
 571
 572         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
 573                 ret = fe->dai_link->compr_ops->set_params(cstream);
 574                 if (ret < 0)
 575                         goto out;
 576         }
 577
 578         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
 579         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
 580
 581 out:
 582         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 583         mutex_unlock(&fe->card->mutex);
 584         return ret;
 585 }
 586
 587 static int soc_compr_get_params(struct snd_compr_stream *cstream,
 588                                 struct snd_codec *params)
 589 {
 590         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 591         struct snd_soc_component *component;
 592         struct snd_soc_rtdcom_list *rtdcom;
 593         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 594         int ret = 0;
 595
 596         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 597
 598         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_params) {
 599                 ret = cpu_dai->driver->cops->get_params(cstream, params, cpu_dai);
 600                 if (ret < 0)
 601                         goto err;
 602         }
 603
 604         for_each_rtdcom(rtd, rtdcom) {
 605                 component = rtdcom->component;
 606
 607                 if (!component->driver->compr_ops ||
 608                     !component->driver->compr_ops->get_params)
 609                         continue;
 610
 611                 ret = component->driver->compr_ops->get_params(cstream, params);
 612                 break;
 613         }
 614
 615 err:
 616         mutex_unlock(&rtd->pcm_mutex);
 617         return ret;
 618 }
 619
 620 static int soc_compr_get_caps(struct snd_compr_stream *cstream,
 621                               struct snd_compr_caps *caps)
 622 {
 623         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 624         struct snd_soc_component *component;
 625         struct snd_soc_rtdcom_list *rtdcom;
 626         int ret = 0;
 627
 628         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 629
 630         for_each_rtdcom(rtd, rtdcom) {
 631                 component = rtdcom->component;
 632
 633                 if (!component->driver->compr_ops ||
 634                     !component->driver->compr_ops->get_caps)
 635                         continue;
 636
 637                 ret = component->driver->compr_ops->get_caps(cstream, caps);
 638                 break;
 639         }
 640
 641         mutex_unlock(&rtd->pcm_mutex);
 642         return ret;
 643 }
 644
 645 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
 646                                     struct snd_compr_codec_caps *codec)
 647 {
 648         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 649         struct snd_soc_component *component;
 650         struct snd_soc_rtdcom_list *rtdcom;
 651         int ret = 0;
 652
 653         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 654
 655         for_each_rtdcom(rtd, rtdcom) {
 656                 component = rtdcom->component;
 657
 658                 if (!component->driver->compr_ops ||
 659                     !component->driver->compr_ops->get_codec_caps)
 660                         continue;
 661
 662                 ret = component->driver->compr_ops->get_codec_caps(cstream,
 663                                                                    codec);
 664                 break;
 665         }
 666
 667         mutex_unlock(&rtd->pcm_mutex);
 668         return ret;
 669 }
 670
 671 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
 672 {
 673         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 674         struct snd_soc_component *component;
 675         struct snd_soc_rtdcom_list *rtdcom;
 676         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 677         int ret = 0;
 678
 679         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 680
 681         if (cpu_dai->driver->cops && cpu_dai->driver->cops->ack) {
 682                 ret = cpu_dai->driver->cops->ack(cstream, bytes, cpu_dai);
 683                 if (ret < 0)
 684                         goto err;
 685         }
 686
 687         for_each_rtdcom(rtd, rtdcom) {
 688                 component = rtdcom->component;
 689
 690                 if (!component->driver->compr_ops ||
 691                     !component->driver->compr_ops->ack)
 692                         continue;
 693
 694                 ret = component->driver->compr_ops->ack(cstream, bytes);
 695                 if (ret < 0)
 696                         goto err;
 697         }
 698
 699 err:
 700         mutex_unlock(&rtd->pcm_mutex);
 701         return ret;
 702 }
 703
 704 static int soc_compr_pointer(struct snd_compr_stream *cstream,
 705                              struct snd_compr_tstamp *tstamp)
 706 {
 707         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 708         struct snd_soc_component *component;
 709         struct snd_soc_rtdcom_list *rtdcom;
 710         int ret = 0;
 711         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 712
 713         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 714
 715         if (cpu_dai->driver->cops && cpu_dai->driver->cops->pointer)
 716                 cpu_dai->driver->cops->pointer(cstream, tstamp, cpu_dai);
 717
 718         for_each_rtdcom(rtd, rtdcom) {
 719                 component = rtdcom->component;
 720
 721                 if (!component->driver->compr_ops ||
 722                     !component->driver->compr_ops->pointer)
 723                         continue;
 724
 725                 ret = component->driver->compr_ops->pointer(cstream, tstamp);
 726                 break;
 727         }
 728
 729         mutex_unlock(&rtd->pcm_mutex);
 730         return ret;
 731 }
 732
 733 static int soc_compr_copy(struct snd_compr_stream *cstream,
 734                           char __user *buf, size_t count)
 735 {
 736         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 737         struct snd_soc_component *component;
 738         struct snd_soc_rtdcom_list *rtdcom;
 739         int ret = 0;
 740
 741         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 742
 743         for_each_rtdcom(rtd, rtdcom) {
 744                 component = rtdcom->component;
 745
 746                 if (!component->driver->compr_ops ||
 747                     !component->driver->compr_ops->copy)
 748                         continue;
 749
 750                 ret = component->driver->compr_ops->copy(cstream, buf, count);
 751                 break;
 752         }
 753
 754         mutex_unlock(&rtd->pcm_mutex);
 755         return ret;
 756 }
 757
 758 static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
 759                                   struct snd_compr_metadata *metadata)
 760 {
 761         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 762         struct snd_soc_component *component;
 763         struct snd_soc_rtdcom_list *rtdcom;
 764         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 765         int ret;
 766
 767         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_metadata) {
 768                 ret = cpu_dai->driver->cops->set_metadata(cstream, metadata, cpu_dai);
 769                 if (ret < 0)
 770                         return ret;
 771         }
 772
 773         for_each_rtdcom(rtd, rtdcom) {
 774                 component = rtdcom->component;
 775
 776                 if (!component->driver->compr_ops ||
 777                     !component->driver->compr_ops->set_metadata)
 778                         continue;
 779
 780                 ret = component->driver->compr_ops->set_metadata(cstream,
 781                                                                  metadata);
 782                 if (ret < 0)
 783                         return ret;
 784         }
 785
 786         return 0;
 787 }
 788
 789 static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
 790                                   struct snd_compr_metadata *metadata)
 791 {
 792         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 793         struct snd_soc_component *component;
 794         struct snd_soc_rtdcom_list *rtdcom;
 795         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 796         int ret;
 797
 798         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_metadata) {
 799                 ret = cpu_dai->driver->cops->get_metadata(cstream, metadata, cpu_dai);
 800                 if (ret < 0)
 801                         return ret;
 802         }
 803
 804         for_each_rtdcom(rtd, rtdcom) {
 805                 component = rtdcom->component;
 806
 807                 if (!component->driver->compr_ops ||
 808                     !component->driver->compr_ops->get_metadata)
 809                         continue;
 810
 811                 return component->driver->compr_ops->get_metadata(cstream,
 812                                                                   metadata);
 813         }
 814
 815         return 0;
 816 }
 817
 818 /* ASoC Compress operations */
 819 static struct snd_compr_ops soc_compr_ops = {
 820         .open           = soc_compr_open,
 821         .free           = soc_compr_free,
 822         .set_params     = soc_compr_set_params,
 823         .set_metadata   = soc_compr_set_metadata,
 824         .get_metadata   = soc_compr_get_metadata,
 825         .get_params     = soc_compr_get_params,
 826         .trigger        = soc_compr_trigger,
 827         .pointer        = soc_compr_pointer,
 828         .ack            = soc_compr_ack,
 829         .get_caps       = soc_compr_get_caps,
 830         .get_codec_caps = soc_compr_get_codec_caps
 831 };
 832
 833 /* ASoC Dynamic Compress operations */
 834 static struct snd_compr_ops soc_compr_dyn_ops = {
 835         .open           = soc_compr_open_fe,
 836         .free           = soc_compr_free_fe,
 837         .set_params     = soc_compr_set_params_fe,
 838         .get_params     = soc_compr_get_params,
 839         .set_metadata   = soc_compr_set_metadata,
 840         .get_metadata   = soc_compr_get_metadata,
 841         .trigger        = soc_compr_trigger_fe,
 842         .pointer        = soc_compr_pointer,
 843         .ack            = soc_compr_ack,
 844         .get_caps       = soc_compr_get_caps,
 845         .get_codec_caps = soc_compr_get_codec_caps
 846 };
 847
 848 /**
 849  * snd_soc_new_compress - create a new compress.
 850  *
 851  * @rtd: The runtime for which we will create compress
 852  * @num: the device index number (zero based - shared with normal PCMs)
 853  *
 854  * Return: 0 for success, else error.
 855  */
 856 int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 857 {
 858         struct snd_soc_component *component;
 859         struct snd_soc_rtdcom_list *rtdcom;
 860         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 861         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 862         struct snd_compr *compr;
 863         struct snd_pcm *be_pcm;
 864         char new_name[64];
 865         int ret = 0, direction = 0;
 866         int playback = 0, capture = 0;
 867
 868         if (rtd->num_codecs > 1) {
 869                 dev_err(rtd->card->dev,
 870                         "Compress ASoC: Multicodec not supported\n");
 871                 return -EINVAL;
 872         }
 873
 874         /* check client and interface hw capabilities */
 875         if (codec_dai->driver->playback.channels_min)
 876                 playback = 1;
 877         if (codec_dai->driver->capture.channels_min)
 878                 capture = 1;
 879
 880         capture = capture && cpu_dai->driver->capture.channels_min;
 881         playback = playback && cpu_dai->driver->playback.channels_min;
 882
 883         /*
 884          * Compress devices are unidirectional so only one of the directions
 885          * should be set, check for that (xor)
 886          */
 887         if (playback + capture != 1) {
 888                 dev_err(rtd->card->dev,
 889                         "Compress ASoC: Invalid direction for P %d, C %d\n",
 890                         playback, capture);
 891                 return -EINVAL;
 892         }
 893
 894         if (playback)
 895                 direction = SND_COMPRESS_PLAYBACK;
 896         else
 897                 direction = SND_COMPRESS_CAPTURE;
 898
 899         compr = kzalloc(sizeof(*compr), GFP_KERNEL);
 900         if (!compr)
 901                 return -ENOMEM;
 902
 903         compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
 904                                   GFP_KERNEL);
 905         if (!compr->ops) {
 906                 ret = -ENOMEM;
 907                 goto compr_err;
 908         }
 909
 910         if (rtd->dai_link->dynamic) {
 911                 snprintf(new_name, sizeof(new_name), "(%s)",
 912                         rtd->dai_link->stream_name);
 913
 914                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
 915                                 rtd->dai_link->dpcm_playback,
 916                                 rtd->dai_link->dpcm_capture, &be_pcm);
 917                 if (ret < 0) {
 918                         dev_err(rtd->card->dev,
 919                                 "Compress ASoC: can't create compressed for %s: %d\n",
 920                                 rtd->dai_link->name, ret);
 921                         goto compr_err;
 922                 }
 923
 924                 rtd->pcm = be_pcm;
 925                 rtd->fe_compr = 1;
 926                 if (rtd->dai_link->dpcm_playback)
 927                         be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
 928                 else if (rtd->dai_link->dpcm_capture)
 929                         be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
 930                 memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
 931         } else {
 932                 snprintf(new_name, sizeof(new_name), "%s %s-%d",
 933                         rtd->dai_link->stream_name, codec_dai->name, num);
 934
 935                 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
 936         }
 937
 938         for_each_rtdcom(rtd, rtdcom) {
 939                 component = rtdcom->component;
 940
 941                 if (!component->driver->compr_ops ||
 942                     !component->driver->compr_ops->copy)
 943                         continue;
 944
 945                 compr->ops->copy = soc_compr_copy;
 946                 break;
 947         }
 948
 949         mutex_init(&compr->lock);
 950         ret = snd_compress_new(rtd->card->snd_card, num, direction,
 951                                 new_name, compr);
 952         if (ret < 0) {
 953                 component = rtd->codec_dai->component;
 954                 dev_err(component->dev,
 955                         "Compress ASoC: can't create compress for codec %s: %d\n",
 956                         component->name, ret);
 957                 goto compr_err;
 958         }
 959
 960         /* DAPM dai link stream work */
 961         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
 962
 963         rtd->compr = compr;
 964         compr->private_data = rtd;
 965
 966         dev_info(rtd->card->dev, "Compress ASoC: %s <-> %s mapping ok\n",
 967                  codec_dai->name, cpu_dai->name);
 968         return ret;
 969
 970 compr_err:
 971         kfree(compr);
 972         return ret;
 973 }
 974 EXPORT_SYMBOL_GPL(snd_soc_new_compress);