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         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 129         struct snd_sof_platform_stream_params platform_params = { 0 };
 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 && 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 && 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 = sof_ipc_get_ops(sdev, 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 && 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 = sof_ipc_get_ops(sdev, pcm);
 283         struct snd_sof_pcm *spcm;
 284         bool reset_hw_params = false;
 285         bool ipc_first = false;
 286         int ret = 0;
 287
 288         /* nothing to do for BE */
 289         if (rtd->dai_link->no_pcm)
 290                 return 0;
 291
 292         spcm = snd_sof_find_spcm_dai(component, rtd);
 293         if (!spcm)
 294                 return -EINVAL;
 295
 296         dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n",
 297                 spcm->pcm.pcm_id, substream->stream, cmd);
 298
 299         switch (cmd) {
 300         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 301                 ipc_first = true;
 302                 break;
 303         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 304                 break;
 305         case SNDRV_PCM_TRIGGER_START:
 306                 if (spcm->stream[substream->stream].suspend_ignored) {
 307                         /*
 308                          * This case will be triggered when INFO_RESUME is
 309                          * not supported, no need to re-start streams that
 310                          * remained enabled in D0ix.
 311                          */
 312                         spcm->stream[substream->stream].suspend_ignored = false;
 313                         return 0;
 314                 }
 315                 break;
 316         case SNDRV_PCM_TRIGGER_SUSPEND:
 317                 if (sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
 318                     spcm->stream[substream->stream].d0i3_compatible) {
 319                         /*
 320                          * trap the event, not sending trigger stop to
 321                          * prevent the FW pipelines from being stopped,
 322                          * and mark the flag to ignore the upcoming DAPM
 323                          * PM events.
 324                          */
 325                         spcm->stream[substream->stream].suspend_ignored = true;
 326                         return 0;
 327                 }
 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 && 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, false);
 355
 356         return ret;
 357 }
 358
 359 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
 360                                          struct snd_pcm_substream *substream)
 361 {
 362         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 363         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 364         struct snd_sof_pcm *spcm;
 365         snd_pcm_uframes_t host, dai;
 366
 367         /* nothing to do for BE */
 368         if (rtd->dai_link->no_pcm)
 369                 return 0;
 370
 371         /* use dsp ops pointer callback directly if set */
 372         if (sof_ops(sdev)->pcm_pointer)
 373                 return sof_ops(sdev)->pcm_pointer(sdev, substream);
 374
 375         spcm = snd_sof_find_spcm_dai(component, rtd);
 376         if (!spcm)
 377                 return -EINVAL;
 378
 379         /* read position from DSP */
 380         host = bytes_to_frames(substream->runtime,
 381                                spcm->stream[substream->stream].posn.host_posn);
 382         dai = bytes_to_frames(substream->runtime,
 383                               spcm->stream[substream->stream].posn.dai_posn);
 384
 385         trace_sof_pcm_pointer_position(sdev, spcm, substream, host, dai);
 386
 387         return host;
 388 }
 389
 390 static int sof_pcm_open(struct snd_soc_component *component,
 391                         struct snd_pcm_substream *substream)
 392 {
 393         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 394         struct snd_pcm_runtime *runtime = substream->runtime;
 395         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 396         struct snd_sof_dsp_ops *ops = sof_ops(sdev);
 397         struct snd_sof_pcm *spcm;
 398         struct snd_soc_tplg_stream_caps *caps;
 399         int ret;
 400
 401         /* nothing to do for BE */
 402         if (rtd->dai_link->no_pcm)
 403                 return 0;
 404
 405         spcm = snd_sof_find_spcm_dai(component, rtd);
 406         if (!spcm)
 407                 return -EINVAL;
 408
 409         dev_dbg(component->dev, "pcm: open stream %d dir %d\n",
 410                 spcm->pcm.pcm_id, substream->stream);
 411
 412
 413         caps = &spcm->pcm.caps[substream->stream];
 414
 415         /* set runtime config */
 416         runtime->hw.info = ops->hw_info; /* platform-specific */
 417
 418         /* set any runtime constraints based on topology */
 419         runtime->hw.formats = le64_to_cpu(caps->formats);
 420         runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);
 421         runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);
 422         runtime->hw.periods_min = le32_to_cpu(caps->periods_min);
 423         runtime->hw.periods_max = le32_to_cpu(caps->periods_max);
 424
 425         /*
 426          * caps->buffer_size_min is not used since the
 427          * snd_pcm_hardware structure only defines buffer_bytes_max
 428          */
 429         runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);
 430
 431         dev_dbg(component->dev, "period min %zd max %zd bytes\n",
 432                 runtime->hw.period_bytes_min,
 433                 runtime->hw.period_bytes_max);
 434         dev_dbg(component->dev, "period count %d max %d\n",
 435                 runtime->hw.periods_min,
 436                 runtime->hw.periods_max);
 437         dev_dbg(component->dev, "buffer max %zd bytes\n",
 438                 runtime->hw.buffer_bytes_max);
 439
 440         /* set wait time - TODO: come from topology */
 441         substream->wait_time = 500;
 442
 443         spcm->stream[substream->stream].posn.host_posn = 0;
 444         spcm->stream[substream->stream].posn.dai_posn = 0;
 445         spcm->stream[substream->stream].substream = substream;
 446         spcm->prepared[substream->stream] = false;
 447
 448         ret = snd_sof_pcm_platform_open(sdev, substream);
 449         if (ret < 0)
 450                 dev_err(component->dev, "error: pcm open failed %d\n", ret);
 451
 452         return ret;
 453 }
 454
 455 static int sof_pcm_close(struct snd_soc_component *component,
 456                          struct snd_pcm_substream *substream)
 457 {
 458         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 459         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 460         struct snd_sof_pcm *spcm;
 461         int err;
 462
 463         /* nothing to do for BE */
 464         if (rtd->dai_link->no_pcm)
 465                 return 0;
 466
 467         spcm = snd_sof_find_spcm_dai(component, rtd);
 468         if (!spcm)
 469                 return -EINVAL;
 470
 471         dev_dbg(component->dev, "pcm: close stream %d dir %d\n",
 472                 spcm->pcm.pcm_id, substream->stream);
 473
 474         err = snd_sof_pcm_platform_close(sdev, substream);
 475         if (err < 0) {
 476                 dev_err(component->dev, "error: pcm close failed %d\n",
 477                         err);
 478                 /*
 479                  * keep going, no point in preventing the close
 480                  * from happening
 481                  */
 482         }
 483
 484         return 0;
 485 }
 486
 487 /*
 488  * Pre-allocate playback/capture audio buffer pages.
 489  * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
 490  * snd_pcm_lib_preallocate_free_for_all() is called by the core.
 491  */
 492 static int sof_pcm_new(struct snd_soc_component *component,
 493                        struct snd_soc_pcm_runtime *rtd)
 494 {
 495         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 496         struct snd_sof_pcm *spcm;
 497         struct snd_pcm *pcm = rtd->pcm;
 498         struct snd_soc_tplg_stream_caps *caps;
 499         int stream = SNDRV_PCM_STREAM_PLAYBACK;
 500
 501         /* find SOF PCM for this RTD */
 502         spcm = snd_sof_find_spcm_dai(component, rtd);
 503         if (!spcm) {
 504                 dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n",
 505                          rtd->dai_link->id);
 506                 return 0;
 507         }
 508
 509         dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name);
 510
 511         /* do we need to pre-allocate playback audio buffer pages */
 512         if (!spcm->pcm.playback)
 513                 goto capture;
 514
 515         caps = &spcm->pcm.caps[stream];
 516
 517         /* pre-allocate playback audio buffer pages */
 518         dev_dbg(component->dev,
 519                 "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
 520                 caps->name, caps->buffer_size_min, caps->buffer_size_max);
 521
 522         if (!pcm->streams[stream].substream) {
 523                 dev_err(component->dev, "error: NULL playback substream!\n");
 524                 return -EINVAL;
 525         }
 526
 527         snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
 528                                    SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
 529                                    0, le32_to_cpu(caps->buffer_size_max));
 530 capture:
 531         stream = SNDRV_PCM_STREAM_CAPTURE;
 532
 533         /* do we need to pre-allocate capture audio buffer pages */
 534         if (!spcm->pcm.capture)
 535                 return 0;
 536
 537         caps = &spcm->pcm.caps[stream];
 538
 539         /* pre-allocate capture audio buffer pages */
 540         dev_dbg(component->dev,
 541                 "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
 542                 caps->name, caps->buffer_size_min, caps->buffer_size_max);
 543
 544         if (!pcm->streams[stream].substream) {
 545                 dev_err(component->dev, "error: NULL capture substream!\n");
 546                 return -EINVAL;
 547         }
 548
 549         snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
 550                                    SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
 551                                    0, le32_to_cpu(caps->buffer_size_max));
 552
 553         return 0;
 554 }
 555
 556 /* fixup the BE DAI link to match any values from topology */
 557 int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)
 558 {
 559         struct snd_interval *rate = hw_param_interval(params,
 560                         SNDRV_PCM_HW_PARAM_RATE);
 561         struct snd_interval *channels = hw_param_interval(params,
 562                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 563         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 564         struct snd_soc_component *component =
 565                 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
 566         struct snd_sof_dai *dai =
 567                 snd_sof_find_dai(component, (char *)rtd->dai_link->name);
 568         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 569         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 570
 571         /* no topology exists for this BE, try a common configuration */
 572         if (!dai) {
 573                 dev_warn(component->dev,
 574                          "warning: no topology found for BE DAI %s config\n",
 575                          rtd->dai_link->name);
 576
 577                 /*  set 48k, stereo, 16bits by default */
 578                 rate->min = 48000;
 579                 rate->max = 48000;
 580
 581                 channels->min = 2;
 582                 channels->max = 2;
 583
 584                 snd_mask_none(fmt);
 585                 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
 586
 587                 return 0;
 588         }
 589
 590         if (pcm_ops && pcm_ops->dai_link_fixup)
 591                 return pcm_ops->dai_link_fixup(rtd, params);
 592
 593         return 0;
 594 }
 595 EXPORT_SYMBOL(sof_pcm_dai_link_fixup);
 596
 597 static int sof_pcm_probe(struct snd_soc_component *component)
 598 {
 599         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 600         struct snd_sof_pdata *plat_data = sdev->pdata;
 601         const char *tplg_filename;
 602         int ret;
 603
 604         /*
 605          * make sure the device is pm_runtime_active before loading the
 606          * topology and initiating IPC or bus transactions
 607          */
 608         ret = pm_runtime_resume_and_get(component->dev);
 609         if (ret < 0 && ret != -EACCES)
 610                 return ret;
 611
 612         /* load the default topology */
 613         sdev->component = component;
 614
 615         tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
 616                                        "%s/%s",
 617                                        plat_data->tplg_filename_prefix,
 618                                        plat_data->tplg_filename);
 619         if (!tplg_filename)
 620                 return -ENOMEM;
 621
 622         ret = snd_sof_load_topology(component, tplg_filename);
 623         if (ret < 0) {
 624                 dev_err(component->dev, "error: failed to load DSP topology %d\n",
 625                         ret);
 626                 return ret;
 627         }
 628
 629         pm_runtime_mark_last_busy(component->dev);
 630         pm_runtime_put_autosuspend(component->dev);
 631
 632         return ret;
 633 }
 634
 635 static void sof_pcm_remove(struct snd_soc_component *component)
 636 {
 637         /* remove topology */
 638         snd_soc_tplg_component_remove(component);
 639 }
 640
 641 static int sof_pcm_ack(struct snd_soc_component *component,
 642                        struct snd_pcm_substream *substream)
 643 {
 644         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 645
 646         return snd_sof_pcm_platform_ack(sdev, substream);
 647 }
 648
 649 static snd_pcm_sframes_t sof_pcm_delay(struct snd_soc_component *component,
 650                                        struct snd_pcm_substream *substream)
 651 {
 652         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 653         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 654
 655         if (pcm_ops && pcm_ops->delay)
 656                 return pcm_ops->delay(component, substream);
 657
 658         return 0;
 659 }
 660
 661 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
 662 {
 663         struct snd_soc_component_driver *pd = &sdev->plat_drv;
 664         struct snd_sof_pdata *plat_data = sdev->pdata;
 665         const char *drv_name;
 666
 667         if (plat_data->machine)
 668                 drv_name = plat_data->machine->drv_name;
 669         else if (plat_data->of_machine)
 670                 drv_name = plat_data->of_machine->drv_name;
 671         else
 672                 drv_name = NULL;
 673
 674         pd->name = "sof-audio-component";
 675         pd->probe = sof_pcm_probe;
 676         pd->remove = sof_pcm_remove;
 677         pd->open = sof_pcm_open;
 678         pd->close = sof_pcm_close;
 679         pd->hw_params = sof_pcm_hw_params;
 680         pd->prepare = sof_pcm_prepare;
 681         pd->hw_free = sof_pcm_hw_free;
 682         pd->trigger = sof_pcm_trigger;
 683         pd->pointer = sof_pcm_pointer;
 684         pd->ack = sof_pcm_ack;
 685         pd->delay = sof_pcm_delay;
 686
 687 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
 688         pd->compress_ops = &sof_compressed_ops;
 689 #endif
 690
 691         pd->pcm_construct = sof_pcm_new;
 692         pd->ignore_machine = drv_name;
 693         pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
 694         pd->be_pcm_base = SOF_BE_PCM_BASE;
 695         pd->use_dai_pcm_id = true;
 696         pd->topology_name_prefix = "sof";
 697
 698          /* increment module refcount when a pcm is opened */
 699         pd->module_get_upon_open = 1;
 700
 701         pd->legacy_dai_naming = 1;
 702 }