1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // This file is provided under a dual BSD/GPLv2 license. When using or 4 // redistributing this file, you may do so under either license. 5 // 6 // Copyright(c) 2018 Intel Corporation. All rights reserved. 7 // 8 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com> 9 // 10 // PCM Layer, interface between ALSA and IPC. 11 // 12 13 #include <linux/pm_runtime.h> 14 #include <sound/pcm_params.h> 15 #include <sound/sof.h> 16 #include "sof-priv.h" 17 #include "sof-audio.h" 18 #include "sof-utils.h" 19 #include "ops.h" 20 21 /* Create DMA buffer page table for DSP */ 22 static int create_page_table(struct snd_soc_component *component, 23 struct snd_pcm_substream *substream, 24 unsigned char *dma_area, size_t size) 25 { 26 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 27 struct snd_sof_pcm *spcm; 28 struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream); 29 int stream = substream->stream; 30 31 spcm = snd_sof_find_spcm_dai(component, rtd); 32 if (!spcm) 33 return -EINVAL; 34 35 return snd_sof_create_page_table(component->dev, dmab, 36 spcm->stream[stream].page_table.area, size); 37 } 38 39 /* 40 * sof pcm period elapse work 41 */ 42 static void snd_sof_pcm_period_elapsed_work(struct work_struct *work) 43 { 44 struct snd_sof_pcm_stream *sps = 45 container_of(work, struct snd_sof_pcm_stream, 46 period_elapsed_work); 47 48 snd_pcm_period_elapsed(sps->substream); 49 } 50 51 void snd_sof_pcm_init_elapsed_work(struct work_struct *work) 52 { 53 INIT_WORK(work, snd_sof_pcm_period_elapsed_work); 54 } 55 56 /* 57 * sof pcm period elapse, this could be called at irq thread context. 58 */ 59 void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream) 60 { 61 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 62 struct snd_soc_component *component = 63 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME); 64 struct snd_sof_pcm *spcm; 65 66 spcm = snd_sof_find_spcm_dai(component, rtd); 67 if (!spcm) { 68 dev_err(component->dev, 69 "error: period elapsed for unknown stream!\n"); 70 return; 71 } 72 73 /* 74 * snd_pcm_period_elapsed() can be called in interrupt context 75 * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(), 76 * when the PCM is done draining or xrun happened, a STOP IPC will 77 * then be sent and this IPC will hit IPC timeout. 78 * To avoid sending IPC before the previous IPC is handled, we 79 * schedule delayed work here to call the snd_pcm_period_elapsed(). 80 */ 81 schedule_work(&spcm->stream[substream->stream].period_elapsed_work); 82 } 83 EXPORT_SYMBOL(snd_sof_pcm_period_elapsed); 84 85 static int 86 sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_runtime *rtd, 87 struct snd_sof_pcm *spcm, struct snd_pcm_hw_params *params, 88 struct snd_sof_platform_stream_params *platform_params, int dir) 89 { 90 struct snd_soc_dai *dai; 91 int ret, j; 92 93 /* query DAPM for list of connected widgets and set them up */ 94 for_each_rtd_cpu_dais(rtd, j, dai) { 95 struct snd_soc_dapm_widget_list *list; 96 97 ret = snd_soc_dapm_dai_get_connected_widgets(dai, dir, &list, 98 dpcm_end_walk_at_be); 99 if (ret < 0) { 100 dev_err(sdev->dev, "error: dai %s has no valid %s path\n", dai->name, 101 dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture"); 102 return ret; 103 } 104 105 spcm->stream[dir].list = list; 106 107 ret = sof_widget_list_setup(sdev, spcm, params, platform_params, dir); 108 if (ret < 0) { 109 dev_err(sdev->dev, "error: failed widget list set up for pcm %d dir %d\n", 110 spcm->pcm.pcm_id, dir); 111 spcm->stream[dir].list = NULL; 112 snd_soc_dapm_dai_free_widgets(&list); 113 return ret; 114 } 115 } 116 117 return 0; 118 } 119 120 static int sof_pcm_hw_params(struct snd_soc_component *component, 121 struct snd_pcm_substream *substream, 122 struct snd_pcm_hw_params *params) 123 { 124 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 125 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 126 struct snd_sof_platform_stream_params platform_params = { 0 }; 127 const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; 128 struct snd_pcm_runtime *runtime = substream->runtime; 129 struct snd_sof_pcm *spcm; 130 int ret; 131 132 /* nothing to do for BE */ 133 if (rtd->dai_link->no_pcm) 134 return 0; 135 136 spcm = snd_sof_find_spcm_dai(component, rtd); 137 if (!spcm) 138 return -EINVAL; 139 140 /* 141 * Handle repeated calls to hw_params() without free_pcm() in 142 * between. At least ALSA OSS emulation depends on this. 143 */ 144 if (pcm_ops->hw_free && spcm->prepared[substream->stream]) { 145 ret = pcm_ops->hw_free(component, substream); 146 if (ret < 0) 147 return ret; 148 149 spcm->prepared[substream->stream] = false; 150 } 151 152 dev_dbg(component->dev, "pcm: hw params stream %d dir %d\n", 153 spcm->pcm.pcm_id, substream->stream); 154 155 ret = snd_sof_pcm_platform_hw_params(sdev, substream, params, &platform_params); 156 if (ret < 0) { 157 dev_err(component->dev, "platform hw params failed\n"); 158 return ret; 159 } 160 161 /* if this is a repeated hw_params without hw_free, skip setting up widgets */ 162 if (!spcm->stream[substream->stream].list) { 163 ret = sof_pcm_setup_connected_widgets(sdev, rtd, spcm, params, &platform_params, 164 substream->stream); 165 if (ret < 0) 166 return ret; 167 } 168 169 /* create compressed page table for audio firmware */ 170 if (runtime->buffer_changed) { 171 ret = create_page_table(component, substream, runtime->dma_area, 172 runtime->dma_bytes); 173 174 if (ret < 0) 175 return ret; 176 } 177 178 if (pcm_ops->hw_params) { 179 ret = pcm_ops->hw_params(component, substream, params, &platform_params); 180 if (ret < 0) 181 return ret; 182 } 183 184 spcm->prepared[substream->stream] = true; 185 186 /* save pcm hw_params */ 187 memcpy(&spcm->params[substream->stream], params, sizeof(*params)); 188 189 return 0; 190 } 191 192 static int sof_pcm_hw_free(struct snd_soc_component *component, 193 struct snd_pcm_substream *substream) 194 { 195 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 196 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 197 const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; 198 struct snd_sof_pcm *spcm; 199 int ret, err = 0; 200 201 /* nothing to do for BE */ 202 if (rtd->dai_link->no_pcm) 203 return 0; 204 205 spcm = snd_sof_find_spcm_dai(component, rtd); 206 if (!spcm) 207 return -EINVAL; 208 209 dev_dbg(component->dev, "pcm: free stream %d dir %d\n", 210 spcm->pcm.pcm_id, substream->stream); 211 212 /* free PCM in the DSP */ 213 if (pcm_ops->hw_free && spcm->prepared[substream->stream]) { 214 ret = pcm_ops->hw_free(component, substream); 215 if (ret < 0) 216 err = ret; 217 218 spcm->prepared[substream->stream] = false; 219 } 220 221 /* stop DMA */ 222 ret = snd_sof_pcm_platform_hw_free(sdev, substream); 223 if (ret < 0) { 224 dev_err(component->dev, "error: platform hw free failed\n"); 225 err = ret; 226 } 227 228 /* free the DAPM widget list */ 229 ret = sof_widget_list_free(sdev, spcm, substream->stream); 230 if (ret < 0) 231 err = ret; 232 233 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work); 234 235 return err; 236 } 237 238 static int sof_pcm_prepare(struct snd_soc_component *component, 239 struct snd_pcm_substream *substream) 240 { 241 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 242 struct snd_sof_pcm *spcm; 243 int ret; 244 245 /* nothing to do for BE */ 246 if (rtd->dai_link->no_pcm) 247 return 0; 248 249 spcm = snd_sof_find_spcm_dai(component, rtd); 250 if (!spcm) 251 return -EINVAL; 252 253 if (spcm->prepared[substream->stream]) 254 return 0; 255 256 dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n", 257 spcm->pcm.pcm_id, substream->stream); 258 259 /* set hw_params */ 260 ret = sof_pcm_hw_params(component, 261 substream, &spcm->params[substream->stream]); 262 if (ret < 0) { 263 dev_err(component->dev, 264 "error: set pcm hw_params after resume\n"); 265 return ret; 266 } 267 268 return 0; 269 } 270 271 /* 272 * FE dai link trigger actions are always executed in non-atomic context because 273 * they involve IPC's. 274 */ 275 static int sof_pcm_trigger(struct snd_soc_component *component, 276 struct snd_pcm_substream *substream, int cmd) 277 { 278 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 279 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 280 const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; 281 struct snd_sof_pcm *spcm; 282 bool reset_hw_params = false; 283 bool free_widget_list = false; 284 bool ipc_first = false; 285 int ret = 0; 286 287 /* nothing to do for BE */ 288 if (rtd->dai_link->no_pcm) 289 return 0; 290 291 spcm = snd_sof_find_spcm_dai(component, rtd); 292 if (!spcm) 293 return -EINVAL; 294 295 dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n", 296 spcm->pcm.pcm_id, substream->stream, cmd); 297 298 switch (cmd) { 299 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 300 ipc_first = true; 301 break; 302 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 303 break; 304 case SNDRV_PCM_TRIGGER_START: 305 if (spcm->stream[substream->stream].suspend_ignored) { 306 /* 307 * This case will be triggered when INFO_RESUME is 308 * not supported, no need to re-start streams that 309 * remained enabled in D0ix. 310 */ 311 spcm->stream[substream->stream].suspend_ignored = false; 312 return 0; 313 } 314 break; 315 case SNDRV_PCM_TRIGGER_SUSPEND: 316 if (sdev->system_suspend_target == SOF_SUSPEND_S0IX && 317 spcm->stream[substream->stream].d0i3_compatible) { 318 /* 319 * trap the event, not sending trigger stop to 320 * prevent the FW pipelines from being stopped, 321 * and mark the flag to ignore the upcoming DAPM 322 * PM events. 323 */ 324 spcm->stream[substream->stream].suspend_ignored = true; 325 return 0; 326 } 327 free_widget_list = true; 328 fallthrough; 329 case SNDRV_PCM_TRIGGER_STOP: 330 ipc_first = true; 331 reset_hw_params = true; 332 break; 333 default: 334 dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd); 335 return -EINVAL; 336 } 337 338 /* 339 * DMA and IPC sequence is different for start and stop. Need to send 340 * STOP IPC before stop DMA 341 */ 342 if (!ipc_first) 343 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 344 345 if (pcm_ops->trigger) 346 ret = pcm_ops->trigger(component, substream, cmd); 347 348 /* need to STOP DMA even if trigger IPC failed */ 349 if (ipc_first) 350 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 351 352 /* free PCM if reset_hw_params is set and the STOP IPC is successful */ 353 if (!ret && reset_hw_params) 354 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, 355 free_widget_list); 356 357 return ret; 358 } 359 360 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component, 361 struct snd_pcm_substream *substream) 362 { 363 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 364 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 365 struct snd_sof_pcm *spcm; 366 snd_pcm_uframes_t host, dai; 367 368 /* nothing to do for BE */ 369 if (rtd->dai_link->no_pcm) 370 return 0; 371 372 /* use dsp ops pointer callback directly if set */ 373 if (sof_ops(sdev)->pcm_pointer) 374 return sof_ops(sdev)->pcm_pointer(sdev, substream); 375 376 spcm = snd_sof_find_spcm_dai(component, rtd); 377 if (!spcm) 378 return -EINVAL; 379 380 /* read position from DSP */ 381 host = bytes_to_frames(substream->runtime, 382 spcm->stream[substream->stream].posn.host_posn); 383 dai = bytes_to_frames(substream->runtime, 384 spcm->stream[substream->stream].posn.dai_posn); 385 386 dev_vdbg(component->dev, 387 "PCM: stream %d dir %d DMA position %lu DAI position %lu\n", 388 spcm->pcm.pcm_id, substream->stream, host, dai); 389 390 return host; 391 } 392 393 static int sof_pcm_open(struct snd_soc_component *component, 394 struct snd_pcm_substream *substream) 395 { 396 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 397 struct snd_pcm_runtime *runtime = substream->runtime; 398 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 399 struct snd_sof_dsp_ops *ops = sof_ops(sdev); 400 struct snd_sof_pcm *spcm; 401 struct snd_soc_tplg_stream_caps *caps; 402 int ret; 403 404 /* nothing to do for BE */ 405 if (rtd->dai_link->no_pcm) 406 return 0; 407 408 spcm = snd_sof_find_spcm_dai(component, rtd); 409 if (!spcm) 410 return -EINVAL; 411 412 dev_dbg(component->dev, "pcm: open stream %d dir %d\n", 413 spcm->pcm.pcm_id, substream->stream); 414 415 416 caps = &spcm->pcm.caps[substream->stream]; 417 418 /* set runtime config */ 419 runtime->hw.info = ops->hw_info; /* platform-specific */ 420 421 /* set any runtime constraints based on topology */ 422 runtime->hw.formats = le64_to_cpu(caps->formats); 423 runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min); 424 runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max); 425 runtime->hw.periods_min = le32_to_cpu(caps->periods_min); 426 runtime->hw.periods_max = le32_to_cpu(caps->periods_max); 427 428 /* 429 * caps->buffer_size_min is not used since the 430 * snd_pcm_hardware structure only defines buffer_bytes_max 431 */ 432 runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max); 433 434 dev_dbg(component->dev, "period min %zd max %zd bytes\n", 435 runtime->hw.period_bytes_min, 436 runtime->hw.period_bytes_max); 437 dev_dbg(component->dev, "period count %d max %d\n", 438 runtime->hw.periods_min, 439 runtime->hw.periods_max); 440 dev_dbg(component->dev, "buffer max %zd bytes\n", 441 runtime->hw.buffer_bytes_max); 442 443 /* set wait time - TODO: come from topology */ 444 substream->wait_time = 500; 445 446 spcm->stream[substream->stream].posn.host_posn = 0; 447 spcm->stream[substream->stream].posn.dai_posn = 0; 448 spcm->stream[substream->stream].substream = substream; 449 spcm->prepared[substream->stream] = false; 450 451 ret = snd_sof_pcm_platform_open(sdev, substream); 452 if (ret < 0) 453 dev_err(component->dev, "error: pcm open failed %d\n", ret); 454 455 return ret; 456 } 457 458 static int sof_pcm_close(struct snd_soc_component *component, 459 struct snd_pcm_substream *substream) 460 { 461 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 462 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 463 struct snd_sof_pcm *spcm; 464 int err; 465 466 /* nothing to do for BE */ 467 if (rtd->dai_link->no_pcm) 468 return 0; 469 470 spcm = snd_sof_find_spcm_dai(component, rtd); 471 if (!spcm) 472 return -EINVAL; 473 474 dev_dbg(component->dev, "pcm: close stream %d dir %d\n", 475 spcm->pcm.pcm_id, substream->stream); 476 477 err = snd_sof_pcm_platform_close(sdev, substream); 478 if (err < 0) { 479 dev_err(component->dev, "error: pcm close failed %d\n", 480 err); 481 /* 482 * keep going, no point in preventing the close 483 * from happening 484 */ 485 } 486 487 return 0; 488 } 489 490 /* 491 * Pre-allocate playback/capture audio buffer pages. 492 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free 493 * snd_pcm_lib_preallocate_free_for_all() is called by the core. 494 */ 495 static int sof_pcm_new(struct snd_soc_component *component, 496 struct snd_soc_pcm_runtime *rtd) 497 { 498 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 499 struct snd_sof_pcm *spcm; 500 struct snd_pcm *pcm = rtd->pcm; 501 struct snd_soc_tplg_stream_caps *caps; 502 int stream = SNDRV_PCM_STREAM_PLAYBACK; 503 504 /* find SOF PCM for this RTD */ 505 spcm = snd_sof_find_spcm_dai(component, rtd); 506 if (!spcm) { 507 dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n", 508 rtd->dai_link->id); 509 return 0; 510 } 511 512 dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name); 513 514 /* do we need to pre-allocate playback audio buffer pages */ 515 if (!spcm->pcm.playback) 516 goto capture; 517 518 caps = &spcm->pcm.caps[stream]; 519 520 /* pre-allocate playback audio buffer pages */ 521 dev_dbg(component->dev, 522 "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n", 523 caps->name, caps->buffer_size_min, caps->buffer_size_max); 524 525 if (!pcm->streams[stream].substream) { 526 dev_err(component->dev, "error: NULL playback substream!\n"); 527 return -EINVAL; 528 } 529 530 snd_pcm_set_managed_buffer(pcm->streams[stream].substream, 531 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 532 0, le32_to_cpu(caps->buffer_size_max)); 533 capture: 534 stream = SNDRV_PCM_STREAM_CAPTURE; 535 536 /* do we need to pre-allocate capture audio buffer pages */ 537 if (!spcm->pcm.capture) 538 return 0; 539 540 caps = &spcm->pcm.caps[stream]; 541 542 /* pre-allocate capture audio buffer pages */ 543 dev_dbg(component->dev, 544 "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n", 545 caps->name, caps->buffer_size_min, caps->buffer_size_max); 546 547 if (!pcm->streams[stream].substream) { 548 dev_err(component->dev, "error: NULL capture substream!\n"); 549 return -EINVAL; 550 } 551 552 snd_pcm_set_managed_buffer(pcm->streams[stream].substream, 553 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 554 0, le32_to_cpu(caps->buffer_size_max)); 555 556 return 0; 557 } 558 559 /* fixup the BE DAI link to match any values from topology */ 560 int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params) 561 { 562 struct snd_interval *rate = hw_param_interval(params, 563 SNDRV_PCM_HW_PARAM_RATE); 564 struct snd_interval *channels = hw_param_interval(params, 565 SNDRV_PCM_HW_PARAM_CHANNELS); 566 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 567 struct snd_soc_component *component = 568 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME); 569 struct snd_sof_dai *dai = 570 snd_sof_find_dai(component, (char *)rtd->dai_link->name); 571 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 572 const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; 573 574 /* no topology exists for this BE, try a common configuration */ 575 if (!dai) { 576 dev_warn(component->dev, 577 "warning: no topology found for BE DAI %s config\n", 578 rtd->dai_link->name); 579 580 /* set 48k, stereo, 16bits by default */ 581 rate->min = 48000; 582 rate->max = 48000; 583 584 channels->min = 2; 585 channels->max = 2; 586 587 snd_mask_none(fmt); 588 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 589 590 return 0; 591 } 592 593 if (pcm_ops->dai_link_fixup) 594 return pcm_ops->dai_link_fixup(rtd, params); 595 596 return 0; 597 } 598 EXPORT_SYMBOL(sof_pcm_dai_link_fixup); 599 600 static int sof_pcm_probe(struct snd_soc_component *component) 601 { 602 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 603 struct snd_sof_pdata *plat_data = sdev->pdata; 604 const char *tplg_filename; 605 int ret; 606 607 /* load the default topology */ 608 sdev->component = component; 609 610 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL, 611 "%s/%s", 612 plat_data->tplg_filename_prefix, 613 plat_data->tplg_filename); 614 if (!tplg_filename) 615 return -ENOMEM; 616 617 ret = snd_sof_load_topology(component, tplg_filename); 618 if (ret < 0) { 619 dev_err(component->dev, "error: failed to load DSP topology %d\n", 620 ret); 621 return ret; 622 } 623 624 return ret; 625 } 626 627 static void sof_pcm_remove(struct snd_soc_component *component) 628 { 629 /* remove topology */ 630 snd_soc_tplg_component_remove(component); 631 } 632 633 static int sof_pcm_ack(struct snd_soc_component *component, 634 struct snd_pcm_substream *substream) 635 { 636 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 637 638 return snd_sof_pcm_platform_ack(sdev, substream); 639 } 640 641 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev) 642 { 643 struct snd_soc_component_driver *pd = &sdev->plat_drv; 644 struct snd_sof_pdata *plat_data = sdev->pdata; 645 const char *drv_name; 646 647 drv_name = plat_data->machine->drv_name; 648 649 pd->name = "sof-audio-component"; 650 pd->probe = sof_pcm_probe; 651 pd->remove = sof_pcm_remove; 652 pd->open = sof_pcm_open; 653 pd->close = sof_pcm_close; 654 pd->hw_params = sof_pcm_hw_params; 655 pd->prepare = sof_pcm_prepare; 656 pd->hw_free = sof_pcm_hw_free; 657 pd->trigger = sof_pcm_trigger; 658 pd->pointer = sof_pcm_pointer; 659 pd->ack = sof_pcm_ack; 660 661 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS) 662 pd->compress_ops = &sof_compressed_ops; 663 #endif 664 665 pd->pcm_construct = sof_pcm_new; 666 pd->ignore_machine = drv_name; 667 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup; 668 pd->be_pcm_base = SOF_BE_PCM_BASE; 669 pd->use_dai_pcm_id = true; 670 pd->topology_name_prefix = "sof"; 671 672 /* increment module refcount when a pcm is opened */ 673 pd->module_get_upon_open = 1; 674 } 675