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