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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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         if (spcm->prepared[substream->stream]) {
 215                 /* stop DMA first if needed */
 216                 if (pcm_ops && pcm_ops->platform_stop_during_hw_free)
 217                         snd_sof_pcm_platform_trigger(sdev, substream, SNDRV_PCM_TRIGGER_STOP);
 218
 219                 /* free PCM in the DSP */
 220                 if (pcm_ops && pcm_ops->hw_free) {
 221                         ret = pcm_ops->hw_free(component, substream);
 222                         if (ret < 0)
 223                                 err = ret;
 224                 }
 225
 226                 spcm->prepared[substream->stream] = false;
 227         }
 228
 229         /* reset DMA */
 230         ret = snd_sof_pcm_platform_hw_free(sdev, substream);
 231         if (ret < 0) {
 232                 dev_err(component->dev, "error: platform hw free failed\n");
 233                 err = ret;
 234         }
 235
 236         /* free the DAPM widget list */
 237         ret = sof_widget_list_free(sdev, spcm, substream->stream);
 238         if (ret < 0)
 239                 err = ret;
 240
 241         cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
 242
 243         return err;
 244 }
 245
 246 static int sof_pcm_prepare(struct snd_soc_component *component,
 247                            struct snd_pcm_substream *substream)
 248 {
 249         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 250         struct snd_sof_pcm *spcm;
 251         int ret;
 252
 253         /* nothing to do for BE */
 254         if (rtd->dai_link->no_pcm)
 255                 return 0;
 256
 257         spcm = snd_sof_find_spcm_dai(component, rtd);
 258         if (!spcm)
 259                 return -EINVAL;
 260
 261         if (spcm->prepared[substream->stream])
 262                 return 0;
 263
 264         dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n",
 265                 spcm->pcm.pcm_id, substream->stream);
 266
 267         /* set hw_params */
 268         ret = sof_pcm_hw_params(component,
 269                                 substream, &spcm->params[substream->stream]);
 270         if (ret < 0) {
 271                 dev_err(component->dev,
 272                         "error: set pcm hw_params after resume\n");
 273                 return ret;
 274         }
 275
 276         return 0;
 277 }
 278
 279 /*
 280  * FE dai link trigger actions are always executed in non-atomic context because
 281  * they involve IPC's.
 282  */
 283 static int sof_pcm_trigger(struct snd_soc_component *component,
 284                            struct snd_pcm_substream *substream, int cmd)
 285 {
 286         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 287         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 288         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 289         struct snd_sof_pcm *spcm;
 290         bool reset_hw_params = false;
 291         bool ipc_first = false;
 292         int ret = 0;
 293
 294         /* nothing to do for BE */
 295         if (rtd->dai_link->no_pcm)
 296                 return 0;
 297
 298         spcm = snd_sof_find_spcm_dai(component, rtd);
 299         if (!spcm)
 300                 return -EINVAL;
 301
 302         dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n",
 303                 spcm->pcm.pcm_id, substream->stream, cmd);
 304
 305         switch (cmd) {
 306         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 307                 ipc_first = true;
 308                 break;
 309         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 310                 if (pcm_ops && pcm_ops->ipc_first_on_start)
 311                         ipc_first = true;
 312                 break;
 313         case SNDRV_PCM_TRIGGER_START:
 314                 if (spcm->stream[substream->stream].suspend_ignored) {
 315                         /*
 316                          * This case will be triggered when INFO_RESUME is
 317                          * not supported, no need to re-start streams that
 318                          * remained enabled in D0ix.
 319                          */
 320                         spcm->stream[substream->stream].suspend_ignored = false;
 321                         return 0;
 322                 }
 323
 324                 if (pcm_ops && pcm_ops->ipc_first_on_start)
 325                         ipc_first = true;
 326                 break;
 327         case SNDRV_PCM_TRIGGER_SUSPEND:
 328                 if (sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
 329                     spcm->stream[substream->stream].d0i3_compatible) {
 330                         /*
 331                          * trap the event, not sending trigger stop to
 332                          * prevent the FW pipelines from being stopped,
 333                          * and mark the flag to ignore the upcoming DAPM
 334                          * PM events.
 335                          */
 336                         spcm->stream[substream->stream].suspend_ignored = true;
 337                         return 0;
 338                 }
 339
 340                 /* On suspend the DMA must be stopped in DSPless mode */
 341                 if (sdev->dspless_mode_selected)
 342                         reset_hw_params = true;
 343
 344                 fallthrough;
 345         case SNDRV_PCM_TRIGGER_STOP:
 346                 ipc_first = true;
 347                 if (pcm_ops && pcm_ops->reset_hw_params_during_stop)
 348                         reset_hw_params = true;
 349                 break;
 350         default:
 351                 dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd);
 352                 return -EINVAL;
 353         }
 354
 355         if (!ipc_first)
 356                 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 357
 358         if (pcm_ops && pcm_ops->trigger)
 359                 ret = pcm_ops->trigger(component, substream, cmd);
 360
 361         switch (cmd) {
 362         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 363         case SNDRV_PCM_TRIGGER_START:
 364                 /* invoke platform trigger to start DMA only if pcm_ops is successful */
 365                 if (ipc_first && !ret)
 366                         snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 367                 break;
 368         case SNDRV_PCM_TRIGGER_SUSPEND:
 369         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 370         case SNDRV_PCM_TRIGGER_STOP:
 371                 /* invoke platform trigger to stop DMA even if pcm_ops isn't set or if it failed */
 372                 if (!pcm_ops || !pcm_ops->platform_stop_during_hw_free)
 373                         snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 374                 break;
 375         default:
 376                 break;
 377         }
 378
 379         /* free PCM if reset_hw_params is set and the STOP IPC is successful */
 380         if (!ret && reset_hw_params)
 381                 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, false);
 382
 383         return ret;
 384 }
 385
 386 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
 387                                          struct snd_pcm_substream *substream)
 388 {
 389         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 390         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 391         struct snd_sof_pcm *spcm;
 392         snd_pcm_uframes_t host, dai;
 393
 394         /* nothing to do for BE */
 395         if (rtd->dai_link->no_pcm)
 396                 return 0;
 397
 398         /* use dsp ops pointer callback directly if set */
 399         if (sof_ops(sdev)->pcm_pointer)
 400                 return sof_ops(sdev)->pcm_pointer(sdev, substream);
 401
 402         spcm = snd_sof_find_spcm_dai(component, rtd);
 403         if (!spcm)
 404                 return -EINVAL;
 405
 406         /* read position from DSP */
 407         host = bytes_to_frames(substream->runtime,
 408                                spcm->stream[substream->stream].posn.host_posn);
 409         dai = bytes_to_frames(substream->runtime,
 410                               spcm->stream[substream->stream].posn.dai_posn);
 411
 412         trace_sof_pcm_pointer_position(sdev, spcm, substream, host, dai);
 413
 414         return host;
 415 }
 416
 417 static int sof_pcm_open(struct snd_soc_component *component,
 418                         struct snd_pcm_substream *substream)
 419 {
 420         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 421         struct snd_pcm_runtime *runtime = substream->runtime;
 422         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 423         struct snd_sof_dsp_ops *ops = sof_ops(sdev);
 424         struct snd_sof_pcm *spcm;
 425         struct snd_soc_tplg_stream_caps *caps;
 426         int ret;
 427
 428         /* nothing to do for BE */
 429         if (rtd->dai_link->no_pcm)
 430                 return 0;
 431
 432         spcm = snd_sof_find_spcm_dai(component, rtd);
 433         if (!spcm)
 434                 return -EINVAL;
 435
 436         dev_dbg(component->dev, "pcm: open stream %d dir %d\n",
 437                 spcm->pcm.pcm_id, substream->stream);
 438
 439
 440         caps = &spcm->pcm.caps[substream->stream];
 441
 442         /* set runtime config */
 443         runtime->hw.info = ops->hw_info; /* platform-specific */
 444
 445         /* set any runtime constraints based on topology */
 446         runtime->hw.formats = le64_to_cpu(caps->formats);
 447         runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);
 448         runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);
 449         runtime->hw.periods_min = le32_to_cpu(caps->periods_min);
 450         runtime->hw.periods_max = le32_to_cpu(caps->periods_max);
 451
 452         /*
 453          * caps->buffer_size_min is not used since the
 454          * snd_pcm_hardware structure only defines buffer_bytes_max
 455          */
 456         runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);
 457
 458         dev_dbg(component->dev, "period min %zd max %zd bytes\n",
 459                 runtime->hw.period_bytes_min,
 460                 runtime->hw.period_bytes_max);
 461         dev_dbg(component->dev, "period count %d max %d\n",
 462                 runtime->hw.periods_min,
 463                 runtime->hw.periods_max);
 464         dev_dbg(component->dev, "buffer max %zd bytes\n",
 465                 runtime->hw.buffer_bytes_max);
 466
 467         /* set wait time - TODO: come from topology */
 468         substream->wait_time = 500;
 469
 470         spcm->stream[substream->stream].posn.host_posn = 0;
 471         spcm->stream[substream->stream].posn.dai_posn = 0;
 472         spcm->stream[substream->stream].substream = substream;
 473         spcm->prepared[substream->stream] = false;
 474
 475         ret = snd_sof_pcm_platform_open(sdev, substream);
 476         if (ret < 0)
 477                 dev_err(component->dev, "error: pcm open failed %d\n", ret);
 478
 479         return ret;
 480 }
 481
 482 static int sof_pcm_close(struct snd_soc_component *component,
 483                          struct snd_pcm_substream *substream)
 484 {
 485         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 486         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 487         struct snd_sof_pcm *spcm;
 488         int err;
 489
 490         /* nothing to do for BE */
 491         if (rtd->dai_link->no_pcm)
 492                 return 0;
 493
 494         spcm = snd_sof_find_spcm_dai(component, rtd);
 495         if (!spcm)
 496                 return -EINVAL;
 497
 498         dev_dbg(component->dev, "pcm: close stream %d dir %d\n",
 499                 spcm->pcm.pcm_id, substream->stream);
 500
 501         err = snd_sof_pcm_platform_close(sdev, substream);
 502         if (err < 0) {
 503                 dev_err(component->dev, "error: pcm close failed %d\n",
 504                         err);
 505                 /*
 506                  * keep going, no point in preventing the close
 507                  * from happening
 508                  */
 509         }
 510
 511         return 0;
 512 }
 513
 514 /*
 515  * Pre-allocate playback/capture audio buffer pages.
 516  * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
 517  * snd_pcm_lib_preallocate_free_for_all() is called by the core.
 518  */
 519 static int sof_pcm_new(struct snd_soc_component *component,
 520                        struct snd_soc_pcm_runtime *rtd)
 521 {
 522         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 523         struct snd_sof_pcm *spcm;
 524         struct snd_pcm *pcm = rtd->pcm;
 525         struct snd_soc_tplg_stream_caps *caps;
 526         int stream = SNDRV_PCM_STREAM_PLAYBACK;
 527
 528         /* find SOF PCM for this RTD */
 529         spcm = snd_sof_find_spcm_dai(component, rtd);
 530         if (!spcm) {
 531                 dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n",
 532                          rtd->dai_link->id);
 533                 return 0;
 534         }
 535
 536         dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name);
 537
 538         /* do we need to pre-allocate playback audio buffer pages */
 539         if (!spcm->pcm.playback)
 540                 goto capture;
 541
 542         caps = &spcm->pcm.caps[stream];
 543
 544         /* pre-allocate playback audio buffer pages */
 545         dev_dbg(component->dev,
 546                 "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
 547                 caps->name, caps->buffer_size_min, caps->buffer_size_max);
 548
 549         if (!pcm->streams[stream].substream) {
 550                 dev_err(component->dev, "error: NULL playback substream!\n");
 551                 return -EINVAL;
 552         }
 553
 554         snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
 555                                    SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
 556                                    0, le32_to_cpu(caps->buffer_size_max));
 557 capture:
 558         stream = SNDRV_PCM_STREAM_CAPTURE;
 559
 560         /* do we need to pre-allocate capture audio buffer pages */
 561         if (!spcm->pcm.capture)
 562                 return 0;
 563
 564         caps = &spcm->pcm.caps[stream];
 565
 566         /* pre-allocate capture audio buffer pages */
 567         dev_dbg(component->dev,
 568                 "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
 569                 caps->name, caps->buffer_size_min, caps->buffer_size_max);
 570
 571         if (!pcm->streams[stream].substream) {
 572                 dev_err(component->dev, "error: NULL capture substream!\n");
 573                 return -EINVAL;
 574         }
 575
 576         snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
 577                                    SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
 578                                    0, le32_to_cpu(caps->buffer_size_max));
 579
 580         return 0;
 581 }
 582
 583 /* fixup the BE DAI link to match any values from topology */
 584 int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)
 585 {
 586         struct snd_interval *rate = hw_param_interval(params,
 587                         SNDRV_PCM_HW_PARAM_RATE);
 588         struct snd_interval *channels = hw_param_interval(params,
 589                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 590         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 591         struct snd_soc_component *component =
 592                 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
 593         struct snd_sof_dai *dai =
 594                 snd_sof_find_dai(component, (char *)rtd->dai_link->name);
 595         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 596         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 597
 598         /* no topology exists for this BE, try a common configuration */
 599         if (!dai) {
 600                 dev_warn(component->dev,
 601                          "warning: no topology found for BE DAI %s config\n",
 602                          rtd->dai_link->name);
 603
 604                 /*  set 48k, stereo, 16bits by default */
 605                 rate->min = 48000;
 606                 rate->max = 48000;
 607
 608                 channels->min = 2;
 609                 channels->max = 2;
 610
 611                 snd_mask_none(fmt);
 612                 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
 613
 614                 return 0;
 615         }
 616
 617         if (pcm_ops && pcm_ops->dai_link_fixup)
 618                 return pcm_ops->dai_link_fixup(rtd, params);
 619
 620         return 0;
 621 }
 622 EXPORT_SYMBOL(sof_pcm_dai_link_fixup);
 623
 624 static int sof_pcm_probe(struct snd_soc_component *component)
 625 {
 626         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 627         struct snd_sof_pdata *plat_data = sdev->pdata;
 628         const char *tplg_filename;
 629         int ret;
 630
 631         /*
 632          * make sure the device is pm_runtime_active before loading the
 633          * topology and initiating IPC or bus transactions
 634          */
 635         ret = pm_runtime_resume_and_get(component->dev);
 636         if (ret < 0 && ret != -EACCES)
 637                 return ret;
 638
 639         /* load the default topology */
 640         sdev->component = component;
 641
 642         tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
 643                                        "%s/%s",
 644                                        plat_data->tplg_filename_prefix,
 645                                        plat_data->tplg_filename);
 646         if (!tplg_filename) {
 647                 ret = -ENOMEM;
 648                 goto pm_error;
 649         }
 650
 651         ret = snd_sof_load_topology(component, tplg_filename);
 652         if (ret < 0)
 653                 dev_err(component->dev, "error: failed to load DSP topology %d\n",
 654                         ret);
 655
 656 pm_error:
 657         pm_runtime_mark_last_busy(component->dev);
 658         pm_runtime_put_autosuspend(component->dev);
 659
 660         return ret;
 661 }
 662
 663 static void sof_pcm_remove(struct snd_soc_component *component)
 664 {
 665         /* remove topology */
 666         snd_soc_tplg_component_remove(component);
 667 }
 668
 669 static int sof_pcm_ack(struct snd_soc_component *component,
 670                        struct snd_pcm_substream *substream)
 671 {
 672         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 673
 674         return snd_sof_pcm_platform_ack(sdev, substream);
 675 }
 676
 677 static snd_pcm_sframes_t sof_pcm_delay(struct snd_soc_component *component,
 678                                        struct snd_pcm_substream *substream)
 679 {
 680         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 681         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 682
 683         if (pcm_ops && pcm_ops->delay)
 684                 return pcm_ops->delay(component, substream);
 685
 686         return 0;
 687 }
 688
 689 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
 690 {
 691         struct snd_soc_component_driver *pd = &sdev->plat_drv;
 692         struct snd_sof_pdata *plat_data = sdev->pdata;
 693         const char *drv_name;
 694
 695         if (plat_data->machine)
 696                 drv_name = plat_data->machine->drv_name;
 697         else if (plat_data->of_machine)
 698                 drv_name = plat_data->of_machine->drv_name;
 699         else
 700                 drv_name = NULL;
 701
 702         pd->name = "sof-audio-component";
 703         pd->probe = sof_pcm_probe;
 704         pd->remove = sof_pcm_remove;
 705         pd->open = sof_pcm_open;
 706         pd->close = sof_pcm_close;
 707         pd->hw_params = sof_pcm_hw_params;
 708         pd->prepare = sof_pcm_prepare;
 709         pd->hw_free = sof_pcm_hw_free;
 710         pd->trigger = sof_pcm_trigger;
 711         pd->pointer = sof_pcm_pointer;
 712         pd->ack = sof_pcm_ack;
 713         pd->delay = sof_pcm_delay;
 714
 715 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
 716         pd->compress_ops = &sof_compressed_ops;
 717 #endif
 718
 719         pd->pcm_construct = sof_pcm_new;
 720         pd->ignore_machine = drv_name;
 721         pd->be_pcm_base = SOF_BE_PCM_BASE;
 722         pd->use_dai_pcm_id = true;
 723         pd->topology_name_prefix = "sof";
 724
 725          /* increment module refcount when a pcm is opened */
 726         pd->module_get_upon_open = 1;
 727
 728         pd->legacy_dai_naming = 1;
 729
 730         /*
 731          * The fixup is only needed when the DSP is in use as with the DSPless
 732          * mode we are directly using the audio interface
 733          */
 734         if (!sdev->dspless_mode_selected)
 735                 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
 736 }