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 <trace/events/sof.h>
  17 #include "sof-of-dev.h"
  18 #include "sof-priv.h"
  19 #include "sof-audio.h"
  20 #include "sof-utils.h"
  21 #include "ops.h"
  22
  23 /* Create DMA buffer page table for DSP */
  24 static int create_page_table(struct snd_soc_component *component,
  25                              struct snd_pcm_substream *substream,
  26                              unsigned char *dma_area, size_t size)
  27 {
  28         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  29         struct snd_sof_pcm *spcm;
  30         struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream);
  31         int stream = substream->stream;
  32
  33         spcm = snd_sof_find_spcm_dai(component, rtd);
  34         if (!spcm)
  35                 return -EINVAL;
  36
  37         return snd_sof_create_page_table(component->dev, dmab,
  38                 spcm->stream[stream].page_table.area, size);
  39 }
  40
  41 /*
  42  * sof pcm period elapse work
  43  */
  44 static void snd_sof_pcm_period_elapsed_work(struct work_struct *work)
  45 {
  46         struct snd_sof_pcm_stream *sps =
  47                 container_of(work, struct snd_sof_pcm_stream,
  48                              period_elapsed_work);
  49
  50         snd_pcm_period_elapsed(sps->substream);
  51 }
  52
  53 void snd_sof_pcm_init_elapsed_work(struct work_struct *work)
  54 {
  55          INIT_WORK(work, snd_sof_pcm_period_elapsed_work);
  56 }
  57
  58 /*
  59  * sof pcm period elapse, this could be called at irq thread context.
  60  */
  61 void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream)
  62 {
  63         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  64         struct snd_soc_component *component =
  65                 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
  66         struct snd_sof_pcm *spcm;
  67
  68         spcm = snd_sof_find_spcm_dai(component, rtd);
  69         if (!spcm) {
  70                 dev_err(component->dev,
  71                         "error: period elapsed for unknown stream!\n");
  72                 return;
  73         }
  74
  75         /*
  76          * snd_pcm_period_elapsed() can be called in interrupt context
  77          * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(),
  78          * when the PCM is done draining or xrun happened, a STOP IPC will
  79          * then be sent and this IPC will hit IPC timeout.
  80          * To avoid sending IPC before the previous IPC is handled, we
  81          * schedule delayed work here to call the snd_pcm_period_elapsed().
  82          */
  83         schedule_work(&spcm->stream[substream->stream].period_elapsed_work);
  84 }
  85 EXPORT_SYMBOL(snd_sof_pcm_period_elapsed);
  86
  87 static int
  88 sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_runtime *rtd,
  89                                 struct snd_sof_pcm *spcm, struct snd_pcm_hw_params *params,
  90                                 struct snd_sof_platform_stream_params *platform_params, int dir)
  91 {
  92         struct snd_soc_dai *dai;
  93         int ret, j;
  94
  95         /* query DAPM for list of connected widgets and set them up */
  96         for_each_rtd_cpu_dais(rtd, j, dai) {
  97                 struct snd_soc_dapm_widget_list *list;
  98
  99                 ret = snd_soc_dapm_dai_get_connected_widgets(dai, dir, &list,
 100                                                              dpcm_end_walk_at_be);
 101                 if (ret < 0) {
 102                         dev_err(sdev->dev, "error: dai %s has no valid %s path\n", dai->name,
 103                                 dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
 104                         return ret;
 105                 }
 106
 107                 spcm->stream[dir].list = list;
 108
 109                 ret = sof_widget_list_setup(sdev, spcm, params, platform_params, dir);
 110                 if (ret < 0) {
 111                         dev_err(sdev->dev, "error: failed widget list set up for pcm %d dir %d\n",
 112                                 spcm->pcm.pcm_id, dir);
 113                         spcm->stream[dir].list = NULL;
 114                         snd_soc_dapm_dai_free_widgets(&list);
 115                         return ret;
 116                 }
 117         }
 118
 119         return 0;
 120 }
 121
 122 static int sof_pcm_hw_params(struct snd_soc_component *component,
 123                              struct snd_pcm_substream *substream,
 124                              struct snd_pcm_hw_params *params)
 125 {
 126         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 127         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 128         struct snd_sof_platform_stream_params platform_params = { 0 };
 129         const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm;
 130         struct snd_pcm_runtime *runtime = substream->runtime;
 131         struct snd_sof_pcm *spcm;
 132         int ret;
 133
 134         /* nothing to do for BE */
 135         if (rtd->dai_link->no_pcm)
 136                 return 0;
 137
 138         spcm = snd_sof_find_spcm_dai(component, rtd);
 139         if (!spcm)
 140                 return -EINVAL;
 141
 142         /*
 143          * Handle repeated calls to hw_params() without free_pcm() in
 144          * between. At least ALSA OSS emulation depends on this.
 145          */
 146         if (pcm_ops->hw_free && spcm->prepared[substream->stream]) {
 147                 ret = pcm_ops->hw_free(component, substream);
 148                 if (ret < 0)
 149                         return ret;
 150
 151                 spcm->prepared[substream->stream] = false;
 152         }
 153
 154         dev_dbg(component->dev, "pcm: hw params stream %d dir %d\n",
 155                 spcm->pcm.pcm_id, substream->stream);
 156
 157         ret = snd_sof_pcm_platform_hw_params(sdev, substream, params, &platform_params);
 158         if (ret < 0) {
 159                 dev_err(component->dev, "platform hw params failed\n");
 160                 return ret;
 161         }
 162
 163         /* if this is a repeated hw_params without hw_free, skip setting up widgets */
 164         if (!spcm->stream[substream->stream].list) {
 165                 ret = sof_pcm_setup_connected_widgets(sdev, rtd, spcm, params, &platform_params,
 166                                                       substream->stream);
 167                 if (ret < 0)
 168                         return ret;
 169         }
 170
 171         /* create compressed page table for audio firmware */
 172         if (runtime->buffer_changed) {
 173                 ret = create_page_table(component, substream, runtime->dma_area,
 174                                         runtime->dma_bytes);
 175
 176                 if (ret < 0)
 177                         return ret;
 178         }
 179
 180         if (pcm_ops->hw_params) {
 181                 ret = pcm_ops->hw_params(component, substream, params, &platform_params);
 182                 if (ret < 0)
 183                         return ret;
 184         }
 185
 186         spcm->prepared[substream->stream] = true;
 187
 188         /* save pcm hw_params */
 189         memcpy(&spcm->params[substream->stream], params, sizeof(*params));
 190
 191         return 0;
 192 }
 193
 194 static int sof_pcm_hw_free(struct snd_soc_component *component,
 195                            struct snd_pcm_substream *substream)
 196 {
 197         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 198         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 199         const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm;
 200         struct snd_sof_pcm *spcm;
 201         int ret, err = 0;
 202
 203         /* nothing to do for BE */
 204         if (rtd->dai_link->no_pcm)
 205                 return 0;
 206
 207         spcm = snd_sof_find_spcm_dai(component, rtd);
 208         if (!spcm)
 209                 return -EINVAL;
 210
 211         dev_dbg(component->dev, "pcm: free stream %d dir %d\n",
 212                 spcm->pcm.pcm_id, substream->stream);
 213
 214         /* free PCM in the DSP */
 215         if (pcm_ops->hw_free && spcm->prepared[substream->stream]) {
 216                 ret = pcm_ops->hw_free(component, substream);
 217                 if (ret < 0)
 218                         err = ret;
 219
 220                 spcm->prepared[substream->stream] = false;
 221         }
 222
 223         /* stop DMA */
 224         ret = snd_sof_pcm_platform_hw_free(sdev, substream);
 225         if (ret < 0) {
 226                 dev_err(component->dev, "error: platform hw free failed\n");
 227                 err = ret;
 228         }
 229
 230         /* free the DAPM widget list */
 231         ret = sof_widget_list_free(sdev, spcm, substream->stream);
 232         if (ret < 0)
 233                 err = ret;
 234
 235         cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
 236
 237         return err;
 238 }
 239
 240 static int sof_pcm_prepare(struct snd_soc_component *component,
 241                            struct snd_pcm_substream *substream)
 242 {
 243         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 244         struct snd_sof_pcm *spcm;
 245         int ret;
 246
 247         /* nothing to do for BE */
 248         if (rtd->dai_link->no_pcm)
 249                 return 0;
 250
 251         spcm = snd_sof_find_spcm_dai(component, rtd);
 252         if (!spcm)
 253                 return -EINVAL;
 254
 255         if (spcm->prepared[substream->stream])
 256                 return 0;
 257
 258         dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n",
 259                 spcm->pcm.pcm_id, substream->stream);
 260
 261         /* set hw_params */
 262         ret = sof_pcm_hw_params(component,
 263                                 substream, &spcm->params[substream->stream]);
 264         if (ret < 0) {
 265                 dev_err(component->dev,
 266                         "error: set pcm hw_params after resume\n");
 267                 return ret;
 268         }
 269
 270         return 0;
 271 }
 272
 273 /*
 274  * FE dai link trigger actions are always executed in non-atomic context because
 275  * they involve IPC's.
 276  */
 277 static int sof_pcm_trigger(struct snd_soc_component *component,
 278                            struct snd_pcm_substream *substream, int cmd)
 279 {
 280         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 281         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 282         const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm;
 283         struct snd_sof_pcm *spcm;
 284         bool reset_hw_params = false;
 285         bool free_widget_list = false;
 286         bool ipc_first = false;
 287         int ret = 0;
 288
 289         /* nothing to do for BE */
 290         if (rtd->dai_link->no_pcm)
 291                 return 0;
 292
 293         spcm = snd_sof_find_spcm_dai(component, rtd);
 294         if (!spcm)
 295                 return -EINVAL;
 296
 297         dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n",
 298                 spcm->pcm.pcm_id, substream->stream, cmd);
 299
 300         switch (cmd) {
 301         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 302                 ipc_first = true;
 303                 break;
 304         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 305                 break;
 306         case SNDRV_PCM_TRIGGER_START:
 307                 if (spcm->stream[substream->stream].suspend_ignored) {
 308                         /*
 309                          * This case will be triggered when INFO_RESUME is
 310                          * not supported, no need to re-start streams that
 311                          * remained enabled in D0ix.
 312                          */
 313                         spcm->stream[substream->stream].suspend_ignored = false;
 314                         return 0;
 315                 }
 316                 break;
 317         case SNDRV_PCM_TRIGGER_SUSPEND:
 318                 if (sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
 319                     spcm->stream[substream->stream].d0i3_compatible) {
 320                         /*
 321                          * trap the event, not sending trigger stop to
 322                          * prevent the FW pipelines from being stopped,
 323                          * and mark the flag to ignore the upcoming DAPM
 324                          * PM events.
 325                          */
 326                         spcm->stream[substream->stream].suspend_ignored = true;
 327                         return 0;
 328                 }
 329                 free_widget_list = true;
 330                 fallthrough;
 331         case SNDRV_PCM_TRIGGER_STOP:
 332                 ipc_first = true;
 333                 reset_hw_params = true;
 334                 break;
 335         default:
 336                 dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd);
 337                 return -EINVAL;
 338         }
 339
 340         /*
 341          * DMA and IPC sequence is different for start and stop. Need to send
 342          * STOP IPC before stop DMA
 343          */
 344         if (!ipc_first)
 345                 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 346
 347         if (pcm_ops->trigger)
 348                 ret = pcm_ops->trigger(component, substream, cmd);
 349
 350         /* need to STOP DMA even if trigger IPC failed */
 351         if (ipc_first)
 352                 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 353
 354         /* free PCM if reset_hw_params is set and the STOP IPC is successful */
 355         if (!ret && reset_hw_params)
 356                 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream,
 357                                           free_widget_list);
 358
 359         return ret;
 360 }
 361
 362 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
 363                                          struct snd_pcm_substream *substream)
 364 {
 365         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 366         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 367         struct snd_sof_pcm *spcm;
 368         snd_pcm_uframes_t host, dai;
 369
 370         /* nothing to do for BE */
 371         if (rtd->dai_link->no_pcm)
 372                 return 0;
 373
 374         /* use dsp ops pointer callback directly if set */
 375         if (sof_ops(sdev)->pcm_pointer)
 376                 return sof_ops(sdev)->pcm_pointer(sdev, substream);
 377
 378         spcm = snd_sof_find_spcm_dai(component, rtd);
 379         if (!spcm)
 380                 return -EINVAL;
 381
 382         /* read position from DSP */
 383         host = bytes_to_frames(substream->runtime,
 384                                spcm->stream[substream->stream].posn.host_posn);
 385         dai = bytes_to_frames(substream->runtime,
 386                               spcm->stream[substream->stream].posn.dai_posn);
 387
 388         trace_sof_pcm_pointer_position(sdev, spcm, substream, 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         /*
 608          * make sure the device is pm_runtime_active before loading the
 609          * topology and initiating IPC or bus transactions
 610          */
 611         ret = pm_runtime_resume_and_get(component->dev);
 612         if (ret < 0 && ret != -EACCES)
 613                 return ret;
 614
 615         /* load the default topology */
 616         sdev->component = component;
 617
 618         tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
 619                                        "%s/%s",
 620                                        plat_data->tplg_filename_prefix,
 621                                        plat_data->tplg_filename);
 622         if (!tplg_filename)
 623                 return -ENOMEM;
 624
 625         ret = snd_sof_load_topology(component, tplg_filename);
 626         if (ret < 0) {
 627                 dev_err(component->dev, "error: failed to load DSP topology %d\n",
 628                         ret);
 629                 return ret;
 630         }
 631
 632         pm_runtime_mark_last_busy(component->dev);
 633         pm_runtime_put_autosuspend(component->dev);
 634
 635         return ret;
 636 }
 637
 638 static void sof_pcm_remove(struct snd_soc_component *component)
 639 {
 640         /* remove topology */
 641         snd_soc_tplg_component_remove(component);
 642 }
 643
 644 static int sof_pcm_ack(struct snd_soc_component *component,
 645                        struct snd_pcm_substream *substream)
 646 {
 647         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 648
 649         return snd_sof_pcm_platform_ack(sdev, substream);
 650 }
 651
 652 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
 653 {
 654         struct snd_soc_component_driver *pd = &sdev->plat_drv;
 655         struct snd_sof_pdata *plat_data = sdev->pdata;
 656         const char *drv_name;
 657
 658         if (plat_data->machine)
 659                 drv_name = plat_data->machine->drv_name;
 660         else if (plat_data->of_machine)
 661                 drv_name = plat_data->of_machine->drv_name;
 662         else
 663                 drv_name = NULL;
 664
 665         pd->name = "sof-audio-component";
 666         pd->probe = sof_pcm_probe;
 667         pd->remove = sof_pcm_remove;
 668         pd->open = sof_pcm_open;
 669         pd->close = sof_pcm_close;
 670         pd->hw_params = sof_pcm_hw_params;
 671         pd->prepare = sof_pcm_prepare;
 672         pd->hw_free = sof_pcm_hw_free;
 673         pd->trigger = sof_pcm_trigger;
 674         pd->pointer = sof_pcm_pointer;
 675         pd->ack = sof_pcm_ack;
 676
 677 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
 678         pd->compress_ops = &sof_compressed_ops;
 679 #endif
 680
 681         pd->pcm_construct = sof_pcm_new;
 682         pd->ignore_machine = drv_name;
 683         pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
 684         pd->be_pcm_base = SOF_BE_PCM_BASE;
 685         pd->use_dai_pcm_id = true;
 686         pd->topology_name_prefix = "sof";
 687
 688          /* increment module refcount when a pcm is opened */
 689         pd->module_get_upon_open = 1;
 690
 691         pd->legacy_dai_naming = 1;
 692 }