sound/soc/soc-compress.c

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