sound/soc/sof/pcm.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 //
   3 // This file is provided under a dual BSD/GPLv2 license.  When using or
   4 // redistributing this file, you may do so under either license.
   5 //
   6 // Copyright(c) 2018 Intel Corporation. All rights reserved.
   7 //
   8 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
   9 //
  10 // PCM Layer, interface between ALSA and IPC.
  11 //
  12
  13 #include <linux/pm_runtime.h>
  14 #include <sound/pcm_params.h>
  15 #include <sound/sof.h>
  16 #include "sof-priv.h"
  17 #include "sof-audio.h"
  18 #include "sof-utils.h"
  19 #include "ops.h"
  20
  21 /* Create DMA buffer page table for DSP */
  22 static int create_page_table(struct snd_soc_component *component,
  23                              struct snd_pcm_substream *substream,
  24                              unsigned char *dma_area, size_t size)
  25 {
  26         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  27         struct snd_sof_pcm *spcm;
  28         struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream);
  29         int stream = substream->stream;
  30
  31         spcm = snd_sof_find_spcm_dai(component, rtd);
  32         if (!spcm)
  33                 return -EINVAL;
  34
  35         return snd_sof_create_page_table(component->dev, dmab,
  36                 spcm->stream[stream].page_table.area, size);
  37 }
  38
  39 /*
  40  * sof pcm period elapse work
  41  */
  42 static void snd_sof_pcm_period_elapsed_work(struct work_struct *work)
  43 {
  44         struct snd_sof_pcm_stream *sps =
  45                 container_of(work, struct snd_sof_pcm_stream,
  46                              period_elapsed_work);
  47
  48         snd_pcm_period_elapsed(sps->substream);
  49 }
  50
  51 void snd_sof_pcm_init_elapsed_work(struct work_struct *work)
  52 {
  53          INIT_WORK(work, snd_sof_pcm_period_elapsed_work);
  54 }
  55
  56 /*
  57  * sof pcm period elapse, this could be called at irq thread context.
  58  */
  59 void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream)
  60 {
  61         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  62         struct snd_soc_component *component =
  63                 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
  64         struct snd_sof_pcm *spcm;
  65
  66         spcm = snd_sof_find_spcm_dai(component, rtd);
  67         if (!spcm) {
  68                 dev_err(component->dev,
  69                         "error: period elapsed for unknown stream!\n");
  70                 return;
  71         }
  72
  73         /*
  74          * snd_pcm_period_elapsed() can be called in interrupt context
  75          * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(),
  76          * when the PCM is done draining or xrun happened, a STOP IPC will
  77          * then be sent and this IPC will hit IPC timeout.
  78          * To avoid sending IPC before the previous IPC is handled, we
  79          * schedule delayed work here to call the snd_pcm_period_elapsed().
  80          */
  81         schedule_work(&spcm->stream[substream->stream].period_elapsed_work);
  82 }
  83 EXPORT_SYMBOL(snd_sof_pcm_period_elapsed);
  84
  85 static int
  86 sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_runtime *rtd,
  87                                 struct snd_sof_pcm *spcm, struct snd_pcm_hw_params *params,
  88                                 struct snd_sof_platform_stream_params *platform_params, int dir)
  89 {
  90         struct snd_soc_dai *dai;
  91         int ret, j;
  92
  93         /* query DAPM for list of connected widgets and set them up */
  94         for_each_rtd_cpu_dais(rtd, j, dai) {
  95                 struct snd_soc_dapm_widget_list *list;
  96
  97                 ret = snd_soc_dapm_dai_get_connected_widgets(dai, dir, &list,
  98                                                              dpcm_end_walk_at_be);
  99                 if (ret < 0) {
 100                         dev_err(sdev->dev, "error: dai %s has no valid %s path\n", dai->name,
 101                                 dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
 102                         return ret;
 103                 }
 104
 105                 spcm->stream[dir].list = list;
 106
 107                 ret = sof_widget_list_setup(sdev, spcm, params, platform_params, dir);
 108                 if (ret < 0) {
 109                         dev_err(sdev->dev, "error: failed widget list set up for pcm %d dir %d\n",
 110                                 spcm->pcm.pcm_id, dir);
 111                         spcm->stream[dir].list = NULL;
 112                         snd_soc_dapm_dai_free_widgets(&list);
 113                         return ret;
 114                 }
 115         }
 116
 117         return 0;
 118 }
 119
 120 static int sof_pcm_hw_params(struct snd_soc_component *component,
 121                              struct snd_pcm_substream *substream,
 122                              struct snd_pcm_hw_params *params)
 123 {
 124         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 125         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 126         struct snd_sof_platform_stream_params platform_params = { 0 };
 127         const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm;
 128         struct snd_pcm_runtime *runtime = substream->runtime;
 129         struct snd_sof_pcm *spcm;
 130         int ret;
 131
 132         /* nothing to do for BE */
 133         if (rtd->dai_link->no_pcm)
 134                 return 0;
 135
 136         spcm = snd_sof_find_spcm_dai(component, rtd);
 137         if (!spcm)
 138                 return -EINVAL;
 139
 140         /*
 141          * Handle repeated calls to hw_params() without free_pcm() in
 142          * between. At least ALSA OSS emulation depends on this.
 143          */
 144         if (pcm_ops->hw_free && spcm->prepared[substream->stream]) {
 145                 ret = pcm_ops->hw_free(component, substream);
 146                 if (ret < 0)
 147                         return ret;
 148
 149                 spcm->prepared[substream->stream] = false;
 150         }
 151
 152         dev_dbg(component->dev, "pcm: hw params stream %d dir %d\n",
 153                 spcm->pcm.pcm_id, substream->stream);
 154
 155         ret = snd_sof_pcm_platform_hw_params(sdev, substream, params, &platform_params);
 156         if (ret < 0) {
 157                 dev_err(component->dev, "platform hw params failed\n");
 158                 return ret;
 159         }
 160
 161         /* if this is a repeated hw_params without hw_free, skip setting up widgets */
 162         if (!spcm->stream[substream->stream].list) {
 163                 ret = sof_pcm_setup_connected_widgets(sdev, rtd, spcm, params, &platform_params,
 164                                                       substream->stream);
 165                 if (ret < 0)
 166                         return ret;
 167         }
 168
 169         /* create compressed page table for audio firmware */
 170         if (runtime->buffer_changed) {
 171                 ret = create_page_table(component, substream, runtime->dma_area,
 172                                         runtime->dma_bytes);
 173
 174                 if (ret < 0)
 175                         return ret;
 176         }
 177
 178         if (pcm_ops->hw_params) {
 179                 ret = pcm_ops->hw_params(component, substream, params, &platform_params);
 180                 if (ret < 0)
 181                         return ret;
 182         }
 183
 184         spcm->prepared[substream->stream] = true;
 185
 186         /* save pcm hw_params */
 187         memcpy(&spcm->params[substream->stream], params, sizeof(*params));
 188
 189         return 0;
 190 }
 191
 192 static int sof_pcm_hw_free(struct snd_soc_component *component,
 193                            struct snd_pcm_substream *substream)
 194 {
 195         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 196         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 197         const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm;
 198         struct snd_sof_pcm *spcm;
 199         int ret, err = 0;
 200
 201         /* nothing to do for BE */
 202         if (rtd->dai_link->no_pcm)
 203                 return 0;
 204
 205         spcm = snd_sof_find_spcm_dai(component, rtd);
 206         if (!spcm)
 207                 return -EINVAL;
 208
 209         dev_dbg(component->dev, "pcm: free stream %d dir %d\n",
 210                 spcm->pcm.pcm_id, substream->stream);
 211
 212         /* free PCM in the DSP */
 213         if (pcm_ops->hw_free && spcm->prepared[substream->stream]) {
 214                 ret = pcm_ops->hw_free(component, substream);
 215                 if (ret < 0)
 216                         err = ret;
 217
 218                 spcm->prepared[substream->stream] = false;
 219         }
 220
 221         /* stop DMA */
 222         ret = snd_sof_pcm_platform_hw_free(sdev, substream);
 223         if (ret < 0) {
 224                 dev_err(component->dev, "error: platform hw free failed\n");
 225                 err = ret;
 226         }
 227
 228         /* free the DAPM widget list */
 229         ret = sof_widget_list_free(sdev, spcm, substream->stream);
 230         if (ret < 0)
 231                 err = ret;
 232
 233         cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
 234
 235         return err;
 236 }
 237
 238 static int sof_pcm_prepare(struct snd_soc_component *component,
 239                            struct snd_pcm_substream *substream)
 240 {
 241         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 242         struct snd_sof_pcm *spcm;
 243         int ret;
 244
 245         /* nothing to do for BE */
 246         if (rtd->dai_link->no_pcm)
 247                 return 0;
 248
 249         spcm = snd_sof_find_spcm_dai(component, rtd);
 250         if (!spcm)
 251                 return -EINVAL;
 252
 253         if (spcm->prepared[substream->stream])
 254                 return 0;
 255
 256         dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n",
 257                 spcm->pcm.pcm_id, substream->stream);
 258
 259         /* set hw_params */
 260         ret = sof_pcm_hw_params(component,
 261                                 substream, &spcm->params[substream->stream]);
 262         if (ret < 0) {
 263                 dev_err(component->dev,
 264                         "error: set pcm hw_params after resume\n");
 265                 return ret;
 266         }
 267
 268         return 0;
 269 }
 270
 271 /*
 272  * FE dai link trigger actions are always executed in non-atomic context because
 273  * they involve IPC's.
 274  */
 275 static int sof_pcm_trigger(struct snd_soc_component *component,
 276                            struct snd_pcm_substream *substream, int cmd)
 277 {
 278         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 279         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 280         const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm;
 281         struct snd_sof_pcm *spcm;
 282         bool reset_hw_params = false;
 283         bool free_widget_list = false;
 284         bool ipc_first = false;
 285         int ret = 0;
 286
 287         /* nothing to do for BE */
 288         if (rtd->dai_link->no_pcm)
 289                 return 0;
 290
 291         spcm = snd_sof_find_spcm_dai(component, rtd);
 292         if (!spcm)
 293                 return -EINVAL;
 294
 295         dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n",
 296                 spcm->pcm.pcm_id, substream->stream, cmd);
 297
 298         switch (cmd) {
 299         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 300                 ipc_first = true;
 301                 break;
 302         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 303                 break;
 304         case SNDRV_PCM_TRIGGER_START:
 305                 if (spcm->stream[substream->stream].suspend_ignored) {
 306                         /*
 307                          * This case will be triggered when INFO_RESUME is
 308                          * not supported, no need to re-start streams that
 309                          * remained enabled in D0ix.
 310                          */
 311                         spcm->stream[substream->stream].suspend_ignored = false;
 312                         return 0;
 313                 }
 314                 break;
 315         case SNDRV_PCM_TRIGGER_SUSPEND:
 316                 if (sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
 317                     spcm->stream[substream->stream].d0i3_compatible) {
 318                         /*
 319                          * trap the event, not sending trigger stop to
 320                          * prevent the FW pipelines from being stopped,
 321                          * and mark the flag to ignore the upcoming DAPM
 322                          * PM events.
 323                          */
 324                         spcm->stream[substream->stream].suspend_ignored = true;
 325                         return 0;
 326                 }
 327                 free_widget_list = true;
 328                 fallthrough;
 329         case SNDRV_PCM_TRIGGER_STOP:
 330                 ipc_first = true;
 331                 reset_hw_params = true;
 332                 break;
 333         default:
 334                 dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd);
 335                 return -EINVAL;
 336         }
 337
 338         /*
 339          * DMA and IPC sequence is different for start and stop. Need to send
 340          * STOP IPC before stop DMA
 341          */
 342         if (!ipc_first)
 343                 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 344
 345         if (pcm_ops->trigger)
 346                 ret = pcm_ops->trigger(component, substream, cmd);
 347
 348         /* need to STOP DMA even if trigger IPC failed */
 349         if (ipc_first)
 350                 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 351
 352         /* free PCM if reset_hw_params is set and the STOP IPC is successful */
 353         if (!ret && reset_hw_params)
 354                 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream,
 355                                           free_widget_list);
 356
 357         return ret;
 358 }
 359
 360 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
 361                                          struct snd_pcm_substream *substream)
 362 {
 363         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 364         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 365         struct snd_sof_pcm *spcm;
 366         snd_pcm_uframes_t host, dai;
 367
 368         /* nothing to do for BE */
 369         if (rtd->dai_link->no_pcm)
 370                 return 0;
 371
 372         /* use dsp ops pointer callback directly if set */
 373         if (sof_ops(sdev)->pcm_pointer)
 374                 return sof_ops(sdev)->pcm_pointer(sdev, substream);
 375
 376         spcm = snd_sof_find_spcm_dai(component, rtd);
 377         if (!spcm)
 378                 return -EINVAL;
 379
 380         /* read position from DSP */
 381         host = bytes_to_frames(substream->runtime,
 382                                spcm->stream[substream->stream].posn.host_posn);
 383         dai = bytes_to_frames(substream->runtime,
 384                               spcm->stream[substream->stream].posn.dai_posn);
 385
 386         dev_vdbg(component->dev,
 387                  "PCM: stream %d dir %d DMA position %lu DAI position %lu\n",
 388                  spcm->pcm.pcm_id, substream->stream, host, dai);
 389
 390         return host;
 391 }
 392
 393 static int sof_pcm_open(struct snd_soc_component *component,
 394                         struct snd_pcm_substream *substream)
 395 {
 396         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 397         struct snd_pcm_runtime *runtime = substream->runtime;
 398         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 399         struct snd_sof_dsp_ops *ops = sof_ops(sdev);
 400         struct snd_sof_pcm *spcm;
 401         struct snd_soc_tplg_stream_caps *caps;
 402         int ret;
 403
 404         /* nothing to do for BE */
 405         if (rtd->dai_link->no_pcm)
 406                 return 0;
 407
 408         spcm = snd_sof_find_spcm_dai(component, rtd);
 409         if (!spcm)
 410                 return -EINVAL;
 411
 412         dev_dbg(component->dev, "pcm: open stream %d dir %d\n",
 413                 spcm->pcm.pcm_id, substream->stream);
 414
 415
 416         caps = &spcm->pcm.caps[substream->stream];
 417
 418         /* set runtime config */
 419         runtime->hw.info = ops->hw_info; /* platform-specific */
 420
 421         /* set any runtime constraints based on topology */
 422         runtime->hw.formats = le64_to_cpu(caps->formats);
 423         runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);
 424         runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);
 425         runtime->hw.periods_min = le32_to_cpu(caps->periods_min);
 426         runtime->hw.periods_max = le32_to_cpu(caps->periods_max);
 427
 428         /*
 429          * caps->buffer_size_min is not used since the
 430          * snd_pcm_hardware structure only defines buffer_bytes_max
 431          */
 432         runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);
 433
 434         dev_dbg(component->dev, "period min %zd max %zd bytes\n",
 435                 runtime->hw.period_bytes_min,
 436                 runtime->hw.period_bytes_max);
 437         dev_dbg(component->dev, "period count %d max %d\n",
 438                 runtime->hw.periods_min,
 439                 runtime->hw.periods_max);
 440         dev_dbg(component->dev, "buffer max %zd bytes\n",
 441                 runtime->hw.buffer_bytes_max);
 442
 443         /* set wait time - TODO: come from topology */
 444         substream->wait_time = 500;
 445
 446         spcm->stream[substream->stream].posn.host_posn = 0;
 447         spcm->stream[substream->stream].posn.dai_posn = 0;
 448         spcm->stream[substream->stream].substream = substream;
 449         spcm->prepared[substream->stream] = false;
 450
 451         ret = snd_sof_pcm_platform_open(sdev, substream);
 452         if (ret < 0)
 453                 dev_err(component->dev, "error: pcm open failed %d\n", ret);
 454
 455         return ret;
 456 }
 457
 458 static int sof_pcm_close(struct snd_soc_component *component,
 459                          struct snd_pcm_substream *substream)
 460 {
 461         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 462         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 463         struct snd_sof_pcm *spcm;
 464         int err;
 465
 466         /* nothing to do for BE */
 467         if (rtd->dai_link->no_pcm)
 468                 return 0;
 469
 470         spcm = snd_sof_find_spcm_dai(component, rtd);
 471         if (!spcm)
 472                 return -EINVAL;
 473
 474         dev_dbg(component->dev, "pcm: close stream %d dir %d\n",
 475                 spcm->pcm.pcm_id, substream->stream);
 476
 477         err = snd_sof_pcm_platform_close(sdev, substream);
 478         if (err < 0) {
 479                 dev_err(component->dev, "error: pcm close failed %d\n",
 480                         err);
 481                 /*
 482                  * keep going, no point in preventing the close
 483                  * from happening
 484                  */
 485         }
 486
 487         return 0;
 488 }
 489
 490 /*
 491  * Pre-allocate playback/capture audio buffer pages.
 492  * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
 493  * snd_pcm_lib_preallocate_free_for_all() is called by the core.
 494  */
 495 static int sof_pcm_new(struct snd_soc_component *component,
 496                        struct snd_soc_pcm_runtime *rtd)
 497 {
 498         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 499         struct snd_sof_pcm *spcm;
 500         struct snd_pcm *pcm = rtd->pcm;
 501         struct snd_soc_tplg_stream_caps *caps;
 502         int stream = SNDRV_PCM_STREAM_PLAYBACK;
 503
 504         /* find SOF PCM for this RTD */
 505         spcm = snd_sof_find_spcm_dai(component, rtd);
 506         if (!spcm) {
 507                 dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n",
 508                          rtd->dai_link->id);
 509                 return 0;
 510         }
 511
 512         dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name);
 513
 514         /* do we need to pre-allocate playback audio buffer pages */
 515         if (!spcm->pcm.playback)
 516                 goto capture;
 517
 518         caps = &spcm->pcm.caps[stream];
 519
 520         /* pre-allocate playback audio buffer pages */
 521         dev_dbg(component->dev,
 522                 "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
 523                 caps->name, caps->buffer_size_min, caps->buffer_size_max);
 524
 525         if (!pcm->streams[stream].substream) {
 526                 dev_err(component->dev, "error: NULL playback substream!\n");
 527                 return -EINVAL;
 528         }
 529
 530         snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
 531                                    SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
 532                                    0, le32_to_cpu(caps->buffer_size_max));
 533 capture:
 534         stream = SNDRV_PCM_STREAM_CAPTURE;
 535
 536         /* do we need to pre-allocate capture audio buffer pages */
 537         if (!spcm->pcm.capture)
 538                 return 0;
 539
 540         caps = &spcm->pcm.caps[stream];
 541
 542         /* pre-allocate capture audio buffer pages */
 543         dev_dbg(component->dev,
 544                 "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
 545                 caps->name, caps->buffer_size_min, caps->buffer_size_max);
 546
 547         if (!pcm->streams[stream].substream) {
 548                 dev_err(component->dev, "error: NULL capture substream!\n");
 549                 return -EINVAL;
 550         }
 551
 552         snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
 553                                    SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
 554                                    0, le32_to_cpu(caps->buffer_size_max));
 555
 556         return 0;
 557 }
 558
 559 /* fixup the BE DAI link to match any values from topology */
 560 int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)
 561 {
 562         struct snd_interval *rate = hw_param_interval(params,
 563                         SNDRV_PCM_HW_PARAM_RATE);
 564         struct snd_interval *channels = hw_param_interval(params,
 565                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 566         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 567         struct snd_soc_component *component =
 568                 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
 569         struct snd_sof_dai *dai =
 570                 snd_sof_find_dai(component, (char *)rtd->dai_link->name);
 571         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 572         const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm;
 573
 574         /* no topology exists for this BE, try a common configuration */
 575         if (!dai) {
 576                 dev_warn(component->dev,
 577                          "warning: no topology found for BE DAI %s config\n",
 578                          rtd->dai_link->name);
 579
 580                 /*  set 48k, stereo, 16bits by default */
 581                 rate->min = 48000;
 582                 rate->max = 48000;
 583
 584                 channels->min = 2;
 585                 channels->max = 2;
 586
 587                 snd_mask_none(fmt);
 588                 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
 589
 590                 return 0;
 591         }
 592
 593         if (pcm_ops->dai_link_fixup)
 594                 return pcm_ops->dai_link_fixup(rtd, params);
 595
 596         return 0;
 597 }
 598 EXPORT_SYMBOL(sof_pcm_dai_link_fixup);
 599
 600 static int sof_pcm_probe(struct snd_soc_component *component)
 601 {
 602         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 603         struct snd_sof_pdata *plat_data = sdev->pdata;
 604         const char *tplg_filename;
 605         int ret;
 606
 607         /* load the default topology */
 608         sdev->component = component;
 609
 610         tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
 611                                        "%s/%s",
 612                                        plat_data->tplg_filename_prefix,
 613                                        plat_data->tplg_filename);
 614         if (!tplg_filename)
 615                 return -ENOMEM;
 616
 617         ret = snd_sof_load_topology(component, tplg_filename);
 618         if (ret < 0) {
 619                 dev_err(component->dev, "error: failed to load DSP topology %d\n",
 620                         ret);
 621                 return ret;
 622         }
 623
 624         return ret;
 625 }
 626
 627 static void sof_pcm_remove(struct snd_soc_component *component)
 628 {
 629         /* remove topology */
 630         snd_soc_tplg_component_remove(component);
 631 }
 632
 633 static int sof_pcm_ack(struct snd_soc_component *component,
 634                        struct snd_pcm_substream *substream)
 635 {
 636         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 637
 638         return snd_sof_pcm_platform_ack(sdev, substream);
 639 }
 640
 641 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
 642 {
 643         struct snd_soc_component_driver *pd = &sdev->plat_drv;
 644         struct snd_sof_pdata *plat_data = sdev->pdata;
 645         const char *drv_name;
 646
 647         drv_name = plat_data->machine->drv_name;
 648
 649         pd->name = "sof-audio-component";
 650         pd->probe = sof_pcm_probe;
 651         pd->remove = sof_pcm_remove;
 652         pd->open = sof_pcm_open;
 653         pd->close = sof_pcm_close;
 654         pd->hw_params = sof_pcm_hw_params;
 655         pd->prepare = sof_pcm_prepare;
 656         pd->hw_free = sof_pcm_hw_free;
 657         pd->trigger = sof_pcm_trigger;
 658         pd->pointer = sof_pcm_pointer;
 659         pd->ack = sof_pcm_ack;
 660
 661 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
 662         pd->compress_ops = &sof_compressed_ops;
 663 #endif
 664
 665         pd->pcm_construct = sof_pcm_new;
 666         pd->ignore_machine = drv_name;
 667         pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
 668         pd->be_pcm_base = SOF_BE_PCM_BASE;
 669         pd->use_dai_pcm_id = true;
 670         pd->topology_name_prefix = "sof";
 671
 672          /* increment module refcount when a pcm is opened */
 673         pd->module_get_upon_open = 1;
 674 }