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
   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                                 snd_pcm_direction_name(dir));
 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         struct snd_sof_pcm *spcm;
 200         int ret;
 201
 202         /* nothing to do for BE */
 203         if (rtd->dai_link->no_pcm)
 204                 return 0;
 205
 206         spcm = snd_sof_find_spcm_dai(component, rtd);
 207         if (!spcm)
 208                 return -EINVAL;
 209
 210         dev_dbg(component->dev, "pcm: free stream %d dir %d\n",
 211                 spcm->pcm.pcm_id, substream->stream);
 212
 213         ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, true);
 214
 215         cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
 216
 217         return ret;
 218 }
 219
 220 static int sof_pcm_prepare(struct snd_soc_component *component,
 221                            struct snd_pcm_substream *substream)
 222 {
 223         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 224         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 225         struct snd_sof_pcm *spcm;
 226         int ret;
 227
 228         /* nothing to do for BE */
 229         if (rtd->dai_link->no_pcm)
 230                 return 0;
 231
 232         spcm = snd_sof_find_spcm_dai(component, rtd);
 233         if (!spcm)
 234                 return -EINVAL;
 235
 236         if (spcm->prepared[substream->stream]) {
 237                 if (!spcm->pending_stop[substream->stream])
 238                         return 0;
 239
 240                 /*
 241                  * this case should be reached in case of xruns where we absolutely
 242                  * want to free-up and reset all PCM/DMA resources
 243                  */
 244                 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, true);
 245                 if (ret < 0)
 246                         return ret;
 247         }
 248
 249         dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n",
 250                 spcm->pcm.pcm_id, substream->stream);
 251
 252         /* set hw_params */
 253         ret = sof_pcm_hw_params(component,
 254                                 substream, &spcm->params[substream->stream]);
 255         if (ret < 0) {
 256                 dev_err(component->dev,
 257                         "error: set pcm hw_params after resume\n");
 258                 return ret;
 259         }
 260
 261         return 0;
 262 }
 263
 264 /*
 265  * FE dai link trigger actions are always executed in non-atomic context because
 266  * they involve IPC's.
 267  */
 268 static int sof_pcm_trigger(struct snd_soc_component *component,
 269                            struct snd_pcm_substream *substream, int cmd)
 270 {
 271         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 272         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 273         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 274         struct snd_sof_pcm *spcm;
 275         bool reset_hw_params = false;
 276         bool ipc_first = false;
 277         int ret = 0;
 278
 279         /* nothing to do for BE */
 280         if (rtd->dai_link->no_pcm)
 281                 return 0;
 282
 283         spcm = snd_sof_find_spcm_dai(component, rtd);
 284         if (!spcm)
 285                 return -EINVAL;
 286
 287         dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n",
 288                 spcm->pcm.pcm_id, substream->stream, cmd);
 289
 290         spcm->pending_stop[substream->stream] = false;
 291
 292         switch (cmd) {
 293         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 294                 ipc_first = true;
 295                 break;
 296         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 297                 if (pcm_ops && pcm_ops->ipc_first_on_start)
 298                         ipc_first = true;
 299                 break;
 300         case SNDRV_PCM_TRIGGER_START:
 301                 if (spcm->stream[substream->stream].suspend_ignored) {
 302                         /*
 303                          * This case will be triggered when INFO_RESUME is
 304                          * not supported, no need to re-start streams that
 305                          * remained enabled in D0ix.
 306                          */
 307                         spcm->stream[substream->stream].suspend_ignored = false;
 308                         return 0;
 309                 }
 310
 311                 if (pcm_ops && pcm_ops->ipc_first_on_start)
 312                         ipc_first = true;
 313                 break;
 314         case SNDRV_PCM_TRIGGER_SUSPEND:
 315                 /*
 316                  * If DSP D0I3 is allowed during S0iX, set the suspend_ignored flag for
 317                  * D0I3-compatible streams to keep the firmware pipeline running
 318                  */
 319                 if (pcm_ops && pcm_ops->d0i3_supported_in_s0ix &&
 320                     sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
 321                     spcm->stream[substream->stream].d0i3_compatible) {
 322                         spcm->stream[substream->stream].suspend_ignored = true;
 323                         return 0;
 324                 }
 325
 326                 /* On suspend the DMA must be stopped in DSPless mode */
 327                 if (sdev->dspless_mode_selected)
 328                         reset_hw_params = true;
 329
 330                 fallthrough;
 331         case SNDRV_PCM_TRIGGER_STOP:
 332                 ipc_first = true;
 333                 if (pcm_ops && pcm_ops->reset_hw_params_during_stop)
 334                         reset_hw_params = true;
 335                 break;
 336         default:
 337                 dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd);
 338                 return -EINVAL;
 339         }
 340
 341         if (!ipc_first)
 342                 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 343
 344         if (pcm_ops && pcm_ops->trigger)
 345                 ret = pcm_ops->trigger(component, substream, cmd);
 346
 347         switch (cmd) {
 348         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 349         case SNDRV_PCM_TRIGGER_START:
 350                 /* invoke platform trigger to start DMA only if pcm_ops is successful */
 351                 if (ipc_first && !ret)
 352                         snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 353                 break;
 354         case SNDRV_PCM_TRIGGER_SUSPEND:
 355         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 356         case SNDRV_PCM_TRIGGER_STOP:
 357                 /* invoke platform trigger to stop DMA even if pcm_ops isn't set or if it failed */
 358                 if (!pcm_ops || !pcm_ops->platform_stop_during_hw_free)
 359                         snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 360
 361                 /*
 362                  * set the pending_stop flag to indicate that pipeline stop has been delayed.
 363                  * This will be used later to stop the pipelines during prepare when recovering
 364                  * from xruns.
 365                  */
 366                 if (pcm_ops && pcm_ops->platform_stop_during_hw_free &&
 367                     cmd == SNDRV_PCM_TRIGGER_STOP)
 368                         spcm->pending_stop[substream->stream] = true;
 369                 break;
 370         default:
 371                 break;
 372         }
 373
 374         /* free PCM if reset_hw_params is set and the STOP IPC is successful */
 375         if (!ret && reset_hw_params)
 376                 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, false);
 377
 378         return ret;
 379 }
 380
 381 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
 382                                          struct snd_pcm_substream *substream)
 383 {
 384         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 385         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 386         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 387         struct snd_sof_pcm *spcm;
 388         snd_pcm_uframes_t host, dai;
 389         int ret = -EOPNOTSUPP;
 390
 391         /* nothing to do for BE */
 392         if (rtd->dai_link->no_pcm)
 393                 return 0;
 394
 395         if (pcm_ops && pcm_ops->pointer)
 396                 ret = pcm_ops->pointer(component, substream, &host);
 397
 398         if (ret != -EOPNOTSUPP)
 399                 return ret ? ret : host;
 400
 401         /* use dsp ops pointer callback directly if set */
 402         if (sof_ops(sdev)->pcm_pointer)
 403                 return sof_ops(sdev)->pcm_pointer(sdev, substream);
 404
 405         spcm = snd_sof_find_spcm_dai(component, rtd);
 406         if (!spcm)
 407                 return -EINVAL;
 408
 409         /* read position from DSP */
 410         host = bytes_to_frames(substream->runtime,
 411                                spcm->stream[substream->stream].posn.host_posn);
 412         dai = bytes_to_frames(substream->runtime,
 413                               spcm->stream[substream->stream].posn.dai_posn);
 414
 415         trace_sof_pcm_pointer_position(sdev, spcm, substream, host, dai);
 416
 417         return host;
 418 }
 419
 420 static int sof_pcm_open(struct snd_soc_component *component,
 421                         struct snd_pcm_substream *substream)
 422 {
 423         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 424         struct snd_pcm_runtime *runtime = substream->runtime;
 425         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 426         const struct snd_sof_dsp_ops *ops = sof_ops(sdev);
 427         struct snd_sof_pcm *spcm;
 428         struct snd_soc_tplg_stream_caps *caps;
 429         int ret;
 430
 431         /* nothing to do for BE */
 432         if (rtd->dai_link->no_pcm)
 433                 return 0;
 434
 435         spcm = snd_sof_find_spcm_dai(component, rtd);
 436         if (!spcm)
 437                 return -EINVAL;
 438
 439         dev_dbg(component->dev, "pcm: open stream %d dir %d\n",
 440                 spcm->pcm.pcm_id, substream->stream);
 441
 442
 443         caps = &spcm->pcm.caps[substream->stream];
 444
 445         /* set runtime config */
 446         runtime->hw.info = ops->hw_info; /* platform-specific */
 447
 448         /* set any runtime constraints based on topology */
 449         runtime->hw.formats = le64_to_cpu(caps->formats);
 450         runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);
 451         runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);
 452         runtime->hw.periods_min = le32_to_cpu(caps->periods_min);
 453         runtime->hw.periods_max = le32_to_cpu(caps->periods_max);
 454
 455         /*
 456          * caps->buffer_size_min is not used since the
 457          * snd_pcm_hardware structure only defines buffer_bytes_max
 458          */
 459         runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);
 460
 461         dev_dbg(component->dev, "period min %zd max %zd bytes\n",
 462                 runtime->hw.period_bytes_min,
 463                 runtime->hw.period_bytes_max);
 464         dev_dbg(component->dev, "period count %d max %d\n",
 465                 runtime->hw.periods_min,
 466                 runtime->hw.periods_max);
 467         dev_dbg(component->dev, "buffer max %zd bytes\n",
 468                 runtime->hw.buffer_bytes_max);
 469
 470         /* set wait time - TODO: come from topology */
 471         substream->wait_time = 500;
 472
 473         spcm->stream[substream->stream].posn.host_posn = 0;
 474         spcm->stream[substream->stream].posn.dai_posn = 0;
 475         spcm->stream[substream->stream].substream = substream;
 476         spcm->prepared[substream->stream] = false;
 477
 478         ret = snd_sof_pcm_platform_open(sdev, substream);
 479         if (ret < 0)
 480                 dev_err(component->dev, "error: pcm open failed %d\n", ret);
 481
 482         return ret;
 483 }
 484
 485 static int sof_pcm_close(struct snd_soc_component *component,
 486                          struct snd_pcm_substream *substream)
 487 {
 488         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 489         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 490         struct snd_sof_pcm *spcm;
 491         int err;
 492
 493         /* nothing to do for BE */
 494         if (rtd->dai_link->no_pcm)
 495                 return 0;
 496
 497         spcm = snd_sof_find_spcm_dai(component, rtd);
 498         if (!spcm)
 499                 return -EINVAL;
 500
 501         dev_dbg(component->dev, "pcm: close stream %d dir %d\n",
 502                 spcm->pcm.pcm_id, substream->stream);
 503
 504         err = snd_sof_pcm_platform_close(sdev, substream);
 505         if (err < 0) {
 506                 dev_err(component->dev, "error: pcm close failed %d\n",
 507                         err);
 508                 /*
 509                  * keep going, no point in preventing the close
 510                  * from happening
 511                  */
 512         }
 513
 514         return 0;
 515 }
 516
 517 /*
 518  * Pre-allocate playback/capture audio buffer pages.
 519  * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
 520  * snd_pcm_lib_preallocate_free_for_all() is called by the core.
 521  */
 522 static int sof_pcm_new(struct snd_soc_component *component,
 523                        struct snd_soc_pcm_runtime *rtd)
 524 {
 525         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 526         struct snd_sof_pcm *spcm;
 527         struct snd_pcm *pcm = rtd->pcm;
 528         struct snd_soc_tplg_stream_caps *caps;
 529         int stream = SNDRV_PCM_STREAM_PLAYBACK;
 530
 531         /* find SOF PCM for this RTD */
 532         spcm = snd_sof_find_spcm_dai(component, rtd);
 533         if (!spcm) {
 534                 dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n",
 535                          rtd->dai_link->id);
 536                 return 0;
 537         }
 538
 539         dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name);
 540
 541         /* do we need to pre-allocate playback audio buffer pages */
 542         if (!spcm->pcm.playback)
 543                 goto capture;
 544
 545         caps = &spcm->pcm.caps[stream];
 546
 547         /* pre-allocate playback audio buffer pages */
 548         dev_dbg(component->dev,
 549                 "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
 550                 caps->name, caps->buffer_size_min, caps->buffer_size_max);
 551
 552         if (!pcm->streams[stream].substream) {
 553                 dev_err(component->dev, "error: NULL playback substream!\n");
 554                 return -EINVAL;
 555         }
 556
 557         snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
 558                                    SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
 559                                    0, le32_to_cpu(caps->buffer_size_max));
 560 capture:
 561         stream = SNDRV_PCM_STREAM_CAPTURE;
 562
 563         /* do we need to pre-allocate capture audio buffer pages */
 564         if (!spcm->pcm.capture)
 565                 return 0;
 566
 567         caps = &spcm->pcm.caps[stream];
 568
 569         /* pre-allocate capture audio buffer pages */
 570         dev_dbg(component->dev,
 571                 "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
 572                 caps->name, caps->buffer_size_min, caps->buffer_size_max);
 573
 574         if (!pcm->streams[stream].substream) {
 575                 dev_err(component->dev, "error: NULL capture substream!\n");
 576                 return -EINVAL;
 577         }
 578
 579         snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
 580                                    SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
 581                                    0, le32_to_cpu(caps->buffer_size_max));
 582
 583         return 0;
 584 }
 585
 586 /* fixup the BE DAI link to match any values from topology */
 587 int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)
 588 {
 589         struct snd_interval *rate = hw_param_interval(params,
 590                         SNDRV_PCM_HW_PARAM_RATE);
 591         struct snd_interval *channels = hw_param_interval(params,
 592                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 593         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 594         struct snd_soc_component *component =
 595                 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
 596         struct snd_sof_dai *dai =
 597                 snd_sof_find_dai(component, (char *)rtd->dai_link->name);
 598         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 599         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 600
 601         /* no topology exists for this BE, try a common configuration */
 602         if (!dai) {
 603                 dev_warn(component->dev,
 604                          "warning: no topology found for BE DAI %s config\n",
 605                          rtd->dai_link->name);
 606
 607                 /*  set 48k, stereo, 16bits by default */
 608                 rate->min = 48000;
 609                 rate->max = 48000;
 610
 611                 channels->min = 2;
 612                 channels->max = 2;
 613
 614                 snd_mask_none(fmt);
 615                 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
 616
 617                 return 0;
 618         }
 619
 620         if (pcm_ops && pcm_ops->dai_link_fixup)
 621                 return pcm_ops->dai_link_fixup(rtd, params);
 622
 623         return 0;
 624 }
 625 EXPORT_SYMBOL(sof_pcm_dai_link_fixup);
 626
 627 static int sof_pcm_probe(struct snd_soc_component *component)
 628 {
 629         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 630         struct snd_sof_pdata *plat_data = sdev->pdata;
 631         const char *tplg_filename;
 632         int ret;
 633
 634         /*
 635          * make sure the device is pm_runtime_active before loading the
 636          * topology and initiating IPC or bus transactions
 637          */
 638         ret = pm_runtime_resume_and_get(component->dev);
 639         if (ret < 0 && ret != -EACCES)
 640                 return ret;
 641
 642         /* load the default topology */
 643         sdev->component = component;
 644
 645         tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
 646                                        "%s/%s",
 647                                        plat_data->tplg_filename_prefix,
 648                                        plat_data->tplg_filename);
 649         if (!tplg_filename) {
 650                 ret = -ENOMEM;
 651                 goto pm_error;
 652         }
 653
 654         ret = snd_sof_load_topology(component, tplg_filename);
 655         if (ret < 0)
 656                 dev_err(component->dev, "error: failed to load DSP topology %d\n",
 657                         ret);
 658
 659 pm_error:
 660         pm_runtime_mark_last_busy(component->dev);
 661         pm_runtime_put_autosuspend(component->dev);
 662
 663         return ret;
 664 }
 665
 666 static void sof_pcm_remove(struct snd_soc_component *component)
 667 {
 668         /* remove topology */
 669         snd_soc_tplg_component_remove(component);
 670 }
 671
 672 static int sof_pcm_ack(struct snd_soc_component *component,
 673                        struct snd_pcm_substream *substream)
 674 {
 675         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 676
 677         return snd_sof_pcm_platform_ack(sdev, substream);
 678 }
 679
 680 static snd_pcm_sframes_t sof_pcm_delay(struct snd_soc_component *component,
 681                                        struct snd_pcm_substream *substream)
 682 {
 683         struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
 684         const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 685
 686         if (pcm_ops && pcm_ops->delay)
 687                 return pcm_ops->delay(component, substream);
 688
 689         return 0;
 690 }
 691
 692 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
 693 {
 694         struct snd_soc_component_driver *pd = &sdev->plat_drv;
 695         struct snd_sof_pdata *plat_data = sdev->pdata;
 696         const char *drv_name;
 697
 698         if (plat_data->machine)
 699                 drv_name = plat_data->machine->drv_name;
 700         else if (plat_data->of_machine)
 701                 drv_name = plat_data->of_machine->drv_name;
 702         else
 703                 drv_name = NULL;
 704
 705         pd->name = "sof-audio-component";
 706         pd->probe = sof_pcm_probe;
 707         pd->remove = sof_pcm_remove;
 708         pd->open = sof_pcm_open;
 709         pd->close = sof_pcm_close;
 710         pd->hw_params = sof_pcm_hw_params;
 711         pd->prepare = sof_pcm_prepare;
 712         pd->hw_free = sof_pcm_hw_free;
 713         pd->trigger = sof_pcm_trigger;
 714         pd->pointer = sof_pcm_pointer;
 715         pd->ack = sof_pcm_ack;
 716         pd->delay = sof_pcm_delay;
 717
 718 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
 719         pd->compress_ops = &sof_compressed_ops;
 720 #endif
 721
 722         pd->pcm_construct = sof_pcm_new;
 723         pd->ignore_machine = drv_name;
 724         pd->be_pcm_base = SOF_BE_PCM_BASE;
 725         pd->use_dai_pcm_id = true;
 726         pd->topology_name_prefix = "sof";
 727
 728          /* increment module refcount when a pcm is opened */
 729         pd->module_get_upon_open = 1;
 730
 731         pd->legacy_dai_naming = 1;
 732
 733         /*
 734          * The fixup is only needed when the DSP is in use as with the DSPless
 735          * mode we are directly using the audio interface
 736          */
 737         if (!sdev->dspless_mode_selected)
 738                 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
 739 }