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 int sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_runtime *rtd, 86 struct snd_sof_pcm *spcm, int dir) 87 { 88 struct snd_soc_dai *dai; 89 int ret, j; 90 91 /* query DAPM for list of connected widgets and set them up */ 92 for_each_rtd_cpu_dais(rtd, j, dai) { 93 struct snd_soc_dapm_widget_list *list; 94 95 ret = snd_soc_dapm_dai_get_connected_widgets(dai, dir, &list, 96 dpcm_end_walk_at_be); 97 if (ret < 0) { 98 dev_err(sdev->dev, "error: dai %s has no valid %s path\n", dai->name, 99 dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture"); 100 return ret; 101 } 102 103 spcm->stream[dir].list = list; 104 105 ret = sof_widget_list_setup(sdev, spcm, dir); 106 if (ret < 0) { 107 dev_err(sdev->dev, "error: failed widget list set up for pcm %d dir %d\n", 108 spcm->pcm.pcm_id, dir); 109 spcm->stream[dir].list = NULL; 110 snd_soc_dapm_dai_free_widgets(&list); 111 return ret; 112 } 113 } 114 115 return 0; 116 } 117 118 static int sof_pcm_hw_params(struct snd_soc_component *component, 119 struct snd_pcm_substream *substream, 120 struct snd_pcm_hw_params *params) 121 { 122 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 123 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 124 struct snd_sof_platform_stream_params platform_params = { 0 }; 125 const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; 126 struct snd_pcm_runtime *runtime = substream->runtime; 127 struct snd_sof_pcm *spcm; 128 int ret; 129 130 /* nothing to do for BE */ 131 if (rtd->dai_link->no_pcm) 132 return 0; 133 134 spcm = snd_sof_find_spcm_dai(component, rtd); 135 if (!spcm) 136 return -EINVAL; 137 138 /* 139 * Handle repeated calls to hw_params() without free_pcm() in 140 * between. At least ALSA OSS emulation depends on this. 141 */ 142 if (pcm_ops->hw_free && spcm->prepared[substream->stream]) { 143 ret = pcm_ops->hw_free(component, substream); 144 if (ret < 0) 145 return ret; 146 147 spcm->prepared[substream->stream] = false; 148 } 149 150 dev_dbg(component->dev, "pcm: hw params stream %d dir %d\n", 151 spcm->pcm.pcm_id, substream->stream); 152 153 /* if this is a repeated hw_params without hw_free, skip setting up widgets */ 154 if (!spcm->stream[substream->stream].list) { 155 ret = sof_pcm_setup_connected_widgets(sdev, rtd, spcm, substream->stream); 156 if (ret < 0) 157 return ret; 158 } 159 160 /* create compressed page table for audio firmware */ 161 if (runtime->buffer_changed) { 162 ret = create_page_table(component, substream, runtime->dma_area, 163 runtime->dma_bytes); 164 165 if (ret < 0) 166 return ret; 167 } 168 169 ret = snd_sof_pcm_platform_hw_params(sdev, substream, params, &platform_params); 170 if (ret < 0) { 171 dev_err(component->dev, "platform hw params failed\n"); 172 return ret; 173 } 174 175 if (pcm_ops->hw_params) { 176 ret = pcm_ops->hw_params(component, substream, params, &platform_params); 177 if (ret < 0) 178 return ret; 179 } 180 181 spcm->prepared[substream->stream] = true; 182 183 /* save pcm hw_params */ 184 memcpy(&spcm->params[substream->stream], params, sizeof(*params)); 185 186 return 0; 187 } 188 189 static int sof_pcm_hw_free(struct snd_soc_component *component, 190 struct snd_pcm_substream *substream) 191 { 192 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 193 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 194 const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; 195 struct snd_sof_pcm *spcm; 196 int ret, err = 0; 197 198 /* nothing to do for BE */ 199 if (rtd->dai_link->no_pcm) 200 return 0; 201 202 spcm = snd_sof_find_spcm_dai(component, rtd); 203 if (!spcm) 204 return -EINVAL; 205 206 dev_dbg(component->dev, "pcm: free stream %d dir %d\n", 207 spcm->pcm.pcm_id, substream->stream); 208 209 /* free PCM in the DSP */ 210 if (pcm_ops->hw_free && spcm->prepared[substream->stream]) { 211 ret = pcm_ops->hw_free(component, substream); 212 if (ret < 0) 213 err = ret; 214 215 spcm->prepared[substream->stream] = false; 216 } 217 218 /* stop DMA */ 219 ret = snd_sof_pcm_platform_hw_free(sdev, substream); 220 if (ret < 0) { 221 dev_err(component->dev, "error: platform hw free failed\n"); 222 err = ret; 223 } 224 225 /* free the DAPM widget list */ 226 ret = sof_widget_list_free(sdev, spcm, substream->stream); 227 if (ret < 0) 228 err = ret; 229 230 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work); 231 232 return err; 233 } 234 235 static int sof_pcm_prepare(struct snd_soc_component *component, 236 struct snd_pcm_substream *substream) 237 { 238 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 239 struct snd_sof_pcm *spcm; 240 int ret; 241 242 /* nothing to do for BE */ 243 if (rtd->dai_link->no_pcm) 244 return 0; 245 246 spcm = snd_sof_find_spcm_dai(component, rtd); 247 if (!spcm) 248 return -EINVAL; 249 250 if (spcm->prepared[substream->stream]) 251 return 0; 252 253 dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n", 254 spcm->pcm.pcm_id, substream->stream); 255 256 /* set hw_params */ 257 ret = sof_pcm_hw_params(component, 258 substream, &spcm->params[substream->stream]); 259 if (ret < 0) { 260 dev_err(component->dev, 261 "error: set pcm hw_params after resume\n"); 262 return ret; 263 } 264 265 return 0; 266 } 267 268 /* 269 * FE dai link trigger actions are always executed in non-atomic context because 270 * they involve IPC's. 271 */ 272 static int sof_pcm_trigger(struct snd_soc_component *component, 273 struct snd_pcm_substream *substream, int cmd) 274 { 275 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 276 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 277 const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm; 278 struct snd_sof_pcm *spcm; 279 bool reset_hw_params = false; 280 bool free_widget_list = false; 281 bool ipc_first = false; 282 int ret = 0; 283 284 /* nothing to do for BE */ 285 if (rtd->dai_link->no_pcm) 286 return 0; 287 288 spcm = snd_sof_find_spcm_dai(component, rtd); 289 if (!spcm) 290 return -EINVAL; 291 292 dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n", 293 spcm->pcm.pcm_id, substream->stream, cmd); 294 295 switch (cmd) { 296 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 297 ipc_first = true; 298 break; 299 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 300 break; 301 case SNDRV_PCM_TRIGGER_START: 302 if (spcm->stream[substream->stream].suspend_ignored) { 303 /* 304 * This case will be triggered when INFO_RESUME is 305 * not supported, no need to re-start streams that 306 * remained enabled in D0ix. 307 */ 308 spcm->stream[substream->stream].suspend_ignored = false; 309 return 0; 310 } 311 break; 312 case SNDRV_PCM_TRIGGER_SUSPEND: 313 if (sdev->system_suspend_target == SOF_SUSPEND_S0IX && 314 spcm->stream[substream->stream].d0i3_compatible) { 315 /* 316 * trap the event, not sending trigger stop to 317 * prevent the FW pipelines from being stopped, 318 * and mark the flag to ignore the upcoming DAPM 319 * PM events. 320 */ 321 spcm->stream[substream->stream].suspend_ignored = true; 322 return 0; 323 } 324 free_widget_list = true; 325 fallthrough; 326 case SNDRV_PCM_TRIGGER_STOP: 327 ipc_first = true; 328 reset_hw_params = true; 329 break; 330 default: 331 dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd); 332 return -EINVAL; 333 } 334 335 /* 336 * DMA and IPC sequence is different for start and stop. Need to send 337 * STOP IPC before stop DMA 338 */ 339 if (!ipc_first) 340 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 341 342 if (pcm_ops->trigger) 343 ret = pcm_ops->trigger(component, substream, cmd); 344 345 /* need to STOP DMA even if trigger IPC failed */ 346 if (ipc_first) 347 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 348 349 /* free PCM if reset_hw_params is set and the STOP IPC is successful */ 350 if (!ret && reset_hw_params) 351 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, 352 free_widget_list); 353 354 return ret; 355 } 356 357 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component, 358 struct snd_pcm_substream *substream) 359 { 360 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 361 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 362 struct snd_sof_pcm *spcm; 363 snd_pcm_uframes_t host, dai; 364 365 /* nothing to do for BE */ 366 if (rtd->dai_link->no_pcm) 367 return 0; 368 369 /* use dsp ops pointer callback directly if set */ 370 if (sof_ops(sdev)->pcm_pointer) 371 return sof_ops(sdev)->pcm_pointer(sdev, substream); 372 373 spcm = snd_sof_find_spcm_dai(component, rtd); 374 if (!spcm) 375 return -EINVAL; 376 377 /* read position from DSP */ 378 host = bytes_to_frames(substream->runtime, 379 spcm->stream[substream->stream].posn.host_posn); 380 dai = bytes_to_frames(substream->runtime, 381 spcm->stream[substream->stream].posn.dai_posn); 382 383 dev_vdbg(component->dev, 384 "PCM: stream %d dir %d DMA position %lu DAI position %lu\n", 385 spcm->pcm.pcm_id, substream->stream, 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 const 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 = sdev->ipc->ops->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->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 /* load the default topology */ 605 sdev->component = component; 606 607 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL, 608 "%s/%s", 609 plat_data->tplg_filename_prefix, 610 plat_data->tplg_filename); 611 if (!tplg_filename) 612 return -ENOMEM; 613 614 ret = snd_sof_load_topology(component, tplg_filename); 615 if (ret < 0) { 616 dev_err(component->dev, "error: failed to load DSP topology %d\n", 617 ret); 618 return ret; 619 } 620 621 return ret; 622 } 623 624 static void sof_pcm_remove(struct snd_soc_component *component) 625 { 626 /* remove topology */ 627 snd_soc_tplg_component_remove(component); 628 } 629 630 static int sof_pcm_ack(struct snd_soc_component *component, 631 struct snd_pcm_substream *substream) 632 { 633 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 634 635 return snd_sof_pcm_platform_ack(sdev, substream); 636 } 637 638 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev) 639 { 640 struct snd_soc_component_driver *pd = &sdev->plat_drv; 641 struct snd_sof_pdata *plat_data = sdev->pdata; 642 const char *drv_name; 643 644 drv_name = plat_data->machine->drv_name; 645 646 pd->name = "sof-audio-component"; 647 pd->probe = sof_pcm_probe; 648 pd->remove = sof_pcm_remove; 649 pd->open = sof_pcm_open; 650 pd->close = sof_pcm_close; 651 pd->hw_params = sof_pcm_hw_params; 652 pd->prepare = sof_pcm_prepare; 653 pd->hw_free = sof_pcm_hw_free; 654 pd->trigger = sof_pcm_trigger; 655 pd->pointer = sof_pcm_pointer; 656 pd->ack = sof_pcm_ack; 657 658 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS) 659 pd->compress_ops = &sof_compressed_ops; 660 #endif 661 662 pd->pcm_construct = sof_pcm_new; 663 pd->ignore_machine = drv_name; 664 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup; 665 pd->be_pcm_base = SOF_BE_PCM_BASE; 666 pd->use_dai_pcm_id = true; 667 pd->topology_name_prefix = "sof"; 668 669 /* increment module refcount when a pcm is opened */ 670 pd->module_get_upon_open = 1; 671 } 672