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                 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
 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         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
 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, __ret;
 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                         ret = __ret;
 370         }
 371         if (ret < 0)
 372                 goto out;
 373
 374         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger)
 375                 cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
 376
 377         switch (cmd) {
 378         case SNDRV_PCM_TRIGGER_START:
 379                 snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
 380                 break;
 381         case SNDRV_PCM_TRIGGER_STOP:
 382                 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
 383                 break;
 384         }
 385
 386 out:
 387         mutex_unlock(&rtd->pcm_mutex);
 388         return ret;
 389 }
 390
 391 static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
 392 {
 393         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 394         struct snd_soc_component *component;
 395         struct snd_soc_rtdcom_list *rtdcom;
 396         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 397         int ret = 0, __ret, stream;
 398
 399         if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
 400                 cmd == SND_COMPR_TRIGGER_DRAIN) {
 401
 402                 for_each_rtdcom(fe, rtdcom) {
 403                         component = rtdcom->component;
 404
 405                         if (!component->driver->compr_ops ||
 406                             !component->driver->compr_ops->trigger)
 407                                 continue;
 408
 409                         __ret = component->driver->compr_ops->trigger(cstream, cmd);
 410                         if (__ret < 0)
 411                                 ret = __ret;
 412                 }
 413                 return ret;
 414         }
 415
 416         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 417                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 418         else
 419                 stream = SNDRV_PCM_STREAM_CAPTURE;
 420
 421         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 422
 423         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger) {
 424                 ret = cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
 425                 if (ret < 0)
 426                         goto out;
 427         }
 428
 429         for_each_rtdcom(fe, rtdcom) {
 430                 component = rtdcom->component;
 431
 432                 if (!component->driver->compr_ops ||
 433                     !component->driver->compr_ops->trigger)
 434                         continue;
 435
 436                 __ret = component->driver->compr_ops->trigger(cstream, cmd);
 437                 if (__ret < 0)
 438                         ret = __ret;
 439         }
 440         if (ret < 0)
 441                 goto out;
 442
 443         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 444
 445         ret = dpcm_be_dai_trigger(fe, stream, cmd);
 446
 447         switch (cmd) {
 448         case SNDRV_PCM_TRIGGER_START:
 449         case SNDRV_PCM_TRIGGER_RESUME:
 450         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 451                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
 452                 break;
 453         case SNDRV_PCM_TRIGGER_STOP:
 454         case SNDRV_PCM_TRIGGER_SUSPEND:
 455                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
 456                 break;
 457         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 458                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
 459                 break;
 460         }
 461
 462 out:
 463         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 464         mutex_unlock(&fe->card->mutex);
 465         return ret;
 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_component *component;
 473         struct snd_soc_rtdcom_list *rtdcom;
 474         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 475         int ret = 0, __ret;
 476
 477         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 478
 479         /*
 480          * First we call set_params for the CPU DAI, then the component
 481          * driver this should configure the SoC side. If the machine has
 482          * compressed ops then we call that as well. The expectation is
 483          * that these callbacks will configure everything for this compress
 484          * path, like configuring a PCM port for a CODEC.
 485          */
 486         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
 487                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
 488                 if (ret < 0)
 489                         goto err;
 490         }
 491
 492         for_each_rtdcom(rtd, rtdcom) {
 493                 component = rtdcom->component;
 494
 495                 if (!component->driver->compr_ops ||
 496                     !component->driver->compr_ops->set_params)
 497                         continue;
 498
 499                 __ret = component->driver->compr_ops->set_params(cstream, params);
 500                 if (__ret < 0)
 501                         ret = __ret;
 502         }
 503         if (ret < 0)
 504                 goto err;
 505
 506         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
 507                 ret = rtd->dai_link->compr_ops->set_params(cstream);
 508                 if (ret < 0)
 509                         goto err;
 510         }
 511
 512         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 513                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 514                                           SND_SOC_DAPM_STREAM_START);
 515         else
 516                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 517                                           SND_SOC_DAPM_STREAM_START);
 518
 519         /* cancel any delayed stream shutdown that is pending */
 520         rtd->pop_wait = 0;
 521         mutex_unlock(&rtd->pcm_mutex);
 522
 523         cancel_delayed_work_sync(&rtd->delayed_work);
 524
 525         return ret;
 526
 527 err:
 528         mutex_unlock(&rtd->pcm_mutex);
 529         return ret;
 530 }
 531
 532 static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
 533                                    struct snd_compr_params *params)
 534 {
 535         struct snd_soc_pcm_runtime *fe = cstream->private_data;
 536         struct snd_pcm_substream *fe_substream =
 537                  fe->pcm->streams[cstream->direction].substream;
 538         struct snd_soc_component *component;
 539         struct snd_soc_rtdcom_list *rtdcom;
 540         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 541         int ret = 0, __ret, stream;
 542
 543         if (cstream->direction == SND_COMPRESS_PLAYBACK)
 544                 stream = SNDRV_PCM_STREAM_PLAYBACK;
 545         else
 546                 stream = SNDRV_PCM_STREAM_CAPTURE;
 547
 548         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 549
 550         /*
 551          * Create an empty hw_params for the BE as the machine driver must
 552          * fix this up to match DSP decoder and ASRC configuration.
 553          * I.e. machine driver fixup for compressed BE is mandatory.
 554          */
 555         memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
 556                 sizeof(struct snd_pcm_hw_params));
 557
 558         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 559
 560         ret = dpcm_be_dai_hw_params(fe, stream);
 561         if (ret < 0)
 562                 goto out;
 563
 564         ret = dpcm_be_dai_prepare(fe, stream);
 565         if (ret < 0)
 566                 goto out;
 567
 568         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
 569                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
 570                 if (ret < 0)
 571                         goto out;
 572         }
 573
 574         for_each_rtdcom(fe, rtdcom) {
 575                 component = rtdcom->component;
 576
 577                 if (!component->driver->compr_ops ||
 578                     !component->driver->compr_ops->set_params)
 579                         continue;
 580
 581                 __ret = component->driver->compr_ops->set_params(cstream, params);
 582                 if (__ret < 0)
 583                         ret = __ret;
 584         }
 585         if (ret < 0)
 586                 goto out;
 587
 588         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
 589                 ret = fe->dai_link->compr_ops->set_params(cstream);
 590                 if (ret < 0)
 591                         goto out;
 592         }
 593
 594         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
 595         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
 596
 597 out:
 598         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 599         mutex_unlock(&fe->card->mutex);
 600         return ret;
 601 }
 602
 603 static int soc_compr_get_params(struct snd_compr_stream *cstream,
 604                                 struct snd_codec *params)
 605 {
 606         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 607         struct snd_soc_component *component;
 608         struct snd_soc_rtdcom_list *rtdcom;
 609         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 610         int ret = 0, __ret;
 611
 612         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 613
 614         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_params) {
 615                 ret = cpu_dai->driver->cops->get_params(cstream, params, cpu_dai);
 616                 if (ret < 0)
 617                         goto err;
 618         }
 619
 620         for_each_rtdcom(rtd, rtdcom) {
 621                 component = rtdcom->component;
 622
 623                 if (!component->driver->compr_ops ||
 624                     !component->driver->compr_ops->get_params)
 625                         continue;
 626
 627                 __ret = component->driver->compr_ops->get_params(cstream, params);
 628                 if (__ret < 0)
 629                         ret = __ret;
 630         }
 631
 632 err:
 633         mutex_unlock(&rtd->pcm_mutex);
 634         return ret;
 635 }
 636
 637 static int soc_compr_get_caps(struct snd_compr_stream *cstream,
 638                               struct snd_compr_caps *caps)
 639 {
 640         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 641         struct snd_soc_component *component;
 642         struct snd_soc_rtdcom_list *rtdcom;
 643         int ret = 0, __ret;
 644
 645         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 646
 647         for_each_rtdcom(rtd, rtdcom) {
 648                 component = rtdcom->component;
 649
 650                 if (!component->driver->compr_ops ||
 651                     !component->driver->compr_ops->get_caps)
 652                         continue;
 653
 654                 __ret = component->driver->compr_ops->get_caps(cstream, caps);
 655                 if (__ret < 0)
 656                         ret = __ret;
 657         }
 658
 659         mutex_unlock(&rtd->pcm_mutex);
 660         return ret;
 661 }
 662
 663 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
 664                                     struct snd_compr_codec_caps *codec)
 665 {
 666         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 667         struct snd_soc_component *component;
 668         struct snd_soc_rtdcom_list *rtdcom;
 669         int ret = 0, __ret;
 670
 671         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 672
 673         for_each_rtdcom(rtd, rtdcom) {
 674                 component = rtdcom->component;
 675
 676                 if (!component->driver->compr_ops ||
 677                     !component->driver->compr_ops->get_codec_caps)
 678                         continue;
 679
 680                 __ret = component->driver->compr_ops->get_codec_caps(cstream, codec);
 681                 if (__ret < 0)
 682                         ret = __ret;
 683         }
 684
 685         mutex_unlock(&rtd->pcm_mutex);
 686         return ret;
 687 }
 688
 689 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
 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         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 695         int ret = 0, __ret;
 696
 697         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 698
 699         if (cpu_dai->driver->cops && cpu_dai->driver->cops->ack) {
 700                 ret = cpu_dai->driver->cops->ack(cstream, bytes, cpu_dai);
 701                 if (ret < 0)
 702                         goto err;
 703         }
 704
 705         for_each_rtdcom(rtd, rtdcom) {
 706                 component = rtdcom->component;
 707
 708                 if (!component->driver->compr_ops ||
 709                     !component->driver->compr_ops->ack)
 710                         continue;
 711
 712                 __ret = component->driver->compr_ops->ack(cstream, bytes);
 713                 if (__ret < 0)
 714                         ret = __ret;
 715         }
 716
 717 err:
 718         mutex_unlock(&rtd->pcm_mutex);
 719         return ret;
 720 }
 721
 722 static int soc_compr_pointer(struct snd_compr_stream *cstream,
 723                              struct snd_compr_tstamp *tstamp)
 724 {
 725         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 726         struct snd_soc_component *component;
 727         struct snd_soc_rtdcom_list *rtdcom;
 728         int ret = 0, __ret;
 729         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 730
 731         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 732
 733         if (cpu_dai->driver->cops && cpu_dai->driver->cops->pointer)
 734                 cpu_dai->driver->cops->pointer(cstream, tstamp, cpu_dai);
 735
 736         for_each_rtdcom(rtd, rtdcom) {
 737                 component = rtdcom->component;
 738
 739                 if (!component->driver->compr_ops ||
 740                     !component->driver->compr_ops->pointer)
 741                         continue;
 742
 743                 __ret = component->driver->compr_ops->pointer(cstream, tstamp);
 744                 if (__ret < 0)
 745                         ret = __ret;
 746         }
 747
 748         mutex_unlock(&rtd->pcm_mutex);
 749         return ret;
 750 }
 751
 752 static int soc_compr_copy(struct snd_compr_stream *cstream,
 753                           char __user *buf, size_t count)
 754 {
 755         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 756         struct snd_soc_component *component;
 757         struct snd_soc_rtdcom_list *rtdcom;
 758         int ret = 0;
 759
 760         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 761
 762         for_each_rtdcom(rtd, rtdcom) {
 763                 component = rtdcom->component;
 764
 765                 if (!component->driver->compr_ops ||
 766                     !component->driver->compr_ops->copy)
 767                         continue;
 768
 769                 ret = component->driver->compr_ops->copy(cstream, buf, count);
 770                 break;
 771         }
 772
 773         mutex_unlock(&rtd->pcm_mutex);
 774         return ret;
 775 }
 776
 777 static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
 778                                   struct snd_compr_metadata *metadata)
 779 {
 780         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 781         struct snd_soc_component *component;
 782         struct snd_soc_rtdcom_list *rtdcom;
 783         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 784         int ret = 0, __ret;
 785
 786         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_metadata) {
 787                 ret = cpu_dai->driver->cops->set_metadata(cstream, metadata, cpu_dai);
 788                 if (ret < 0)
 789                         return ret;
 790         }
 791
 792         for_each_rtdcom(rtd, rtdcom) {
 793                 component = rtdcom->component;
 794
 795                 if (!component->driver->compr_ops ||
 796                     !component->driver->compr_ops->set_metadata)
 797                         continue;
 798
 799                 __ret = component->driver->compr_ops->set_metadata(cstream, metadata);
 800                 if (__ret < 0)
 801                         ret = __ret;
 802         }
 803
 804         return ret;
 805 }
 806
 807 static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
 808                                   struct snd_compr_metadata *metadata)
 809 {
 810         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 811         struct snd_soc_component *component;
 812         struct snd_soc_rtdcom_list *rtdcom;
 813         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 814         int ret = 0, __ret;
 815
 816         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_metadata) {
 817                 ret = cpu_dai->driver->cops->get_metadata(cstream, metadata, cpu_dai);
 818                 if (ret < 0)
 819                         return ret;
 820         }
 821
 822         for_each_rtdcom(rtd, rtdcom) {
 823                 component = rtdcom->component;
 824
 825                 if (!component->driver->compr_ops ||
 826                     !component->driver->compr_ops->get_metadata)
 827                         continue;
 828
 829                 __ret = component->driver->compr_ops->get_metadata(cstream, metadata);
 830                 if (__ret < 0)
 831                         ret = __ret;
 832         }
 833
 834         return ret;
 835 }
 836
 837 /* ASoC Compress operations */
 838 static struct snd_compr_ops soc_compr_ops = {
 839         .open           = soc_compr_open,
 840         .free           = soc_compr_free,
 841         .set_params     = soc_compr_set_params,
 842         .set_metadata   = soc_compr_set_metadata,
 843         .get_metadata   = soc_compr_get_metadata,
 844         .get_params     = soc_compr_get_params,
 845         .trigger        = soc_compr_trigger,
 846         .pointer        = soc_compr_pointer,
 847         .ack            = soc_compr_ack,
 848         .get_caps       = soc_compr_get_caps,
 849         .get_codec_caps = soc_compr_get_codec_caps
 850 };
 851
 852 /* ASoC Dynamic Compress operations */
 853 static struct snd_compr_ops soc_compr_dyn_ops = {
 854         .open           = soc_compr_open_fe,
 855         .free           = soc_compr_free_fe,
 856         .set_params     = soc_compr_set_params_fe,
 857         .get_params     = soc_compr_get_params,
 858         .set_metadata   = soc_compr_set_metadata,
 859         .get_metadata   = soc_compr_get_metadata,
 860         .trigger        = soc_compr_trigger_fe,
 861         .pointer        = soc_compr_pointer,
 862         .ack            = soc_compr_ack,
 863         .get_caps       = soc_compr_get_caps,
 864         .get_codec_caps = soc_compr_get_codec_caps
 865 };
 866
 867 /**
 868  * snd_soc_new_compress - create a new compress.
 869  *
 870  * @rtd: The runtime for which we will create compress
 871  * @num: the device index number (zero based - shared with normal PCMs)
 872  *
 873  * Return: 0 for success, else error.
 874  */
 875 int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 876 {
 877         struct snd_soc_component *component;
 878         struct snd_soc_rtdcom_list *rtdcom;
 879         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 880         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 881         struct snd_compr *compr;
 882         struct snd_pcm *be_pcm;
 883         char new_name[64];
 884         int ret = 0, direction = 0;
 885         int playback = 0, capture = 0;
 886
 887         if (rtd->num_codecs > 1) {
 888                 dev_err(rtd->card->dev,
 889                         "Compress ASoC: Multicodec not supported\n");
 890                 return -EINVAL;
 891         }
 892
 893         /* check client and interface hw capabilities */
 894         if (codec_dai->driver->playback.channels_min)
 895                 playback = 1;
 896         if (codec_dai->driver->capture.channels_min)
 897                 capture = 1;
 898
 899         capture = capture && cpu_dai->driver->capture.channels_min;
 900         playback = playback && cpu_dai->driver->playback.channels_min;
 901
 902         /*
 903          * Compress devices are unidirectional so only one of the directions
 904          * should be set, check for that (xor)
 905          */
 906         if (playback + capture != 1) {
 907                 dev_err(rtd->card->dev,
 908                         "Compress ASoC: Invalid direction for P %d, C %d\n",
 909                         playback, capture);
 910                 return -EINVAL;
 911         }
 912
 913         if (playback)
 914                 direction = SND_COMPRESS_PLAYBACK;
 915         else
 916                 direction = SND_COMPRESS_CAPTURE;
 917
 918         compr = kzalloc(sizeof(*compr), GFP_KERNEL);
 919         if (!compr)
 920                 return -ENOMEM;
 921
 922         compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
 923                                   GFP_KERNEL);
 924         if (!compr->ops) {
 925                 ret = -ENOMEM;
 926                 goto compr_err;
 927         }
 928
 929         if (rtd->dai_link->dynamic) {
 930                 snprintf(new_name, sizeof(new_name), "(%s)",
 931                         rtd->dai_link->stream_name);
 932
 933                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
 934                                 rtd->dai_link->dpcm_playback,
 935                                 rtd->dai_link->dpcm_capture, &be_pcm);
 936                 if (ret < 0) {
 937                         dev_err(rtd->card->dev,
 938                                 "Compress ASoC: can't create compressed for %s: %d\n",
 939                                 rtd->dai_link->name, ret);
 940                         goto compr_err;
 941                 }
 942
 943                 rtd->pcm = be_pcm;
 944                 rtd->fe_compr = 1;
 945                 if (rtd->dai_link->dpcm_playback)
 946                         be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
 947                 else if (rtd->dai_link->dpcm_capture)
 948                         be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
 949                 memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
 950         } else {
 951                 snprintf(new_name, sizeof(new_name), "%s %s-%d",
 952                         rtd->dai_link->stream_name, codec_dai->name, num);
 953
 954                 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
 955         }
 956
 957         for_each_rtdcom(rtd, rtdcom) {
 958                 component = rtdcom->component;
 959
 960                 if (!component->driver->compr_ops ||
 961                     !component->driver->compr_ops->copy)
 962                         continue;
 963
 964                 compr->ops->copy = soc_compr_copy;
 965                 break;
 966         }
 967
 968         mutex_init(&compr->lock);
 969         ret = snd_compress_new(rtd->card->snd_card, num, direction,
 970                                 new_name, compr);
 971         if (ret < 0) {
 972                 component = rtd->codec_dai->component;
 973                 dev_err(component->dev,
 974                         "Compress ASoC: can't create compress for codec %s: %d\n",
 975                         component->name, ret);
 976                 goto compr_err;
 977         }
 978
 979         /* DAPM dai link stream work */
 980         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
 981
 982         rtd->compr = compr;
 983         compr->private_data = rtd;
 984
 985         dev_info(rtd->card->dev, "Compress ASoC: %s <-> %s mapping ok\n",
 986                  codec_dai->name, cpu_dai->name);
 987         return ret;
 988
 989 compr_err:
 990         kfree(compr);
 991         return ret;
 992 }
 993 EXPORT_SYMBOL_GPL(snd_soc_new_compress);