1 // SPDX-License-Identifier: (GPL-2.0 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 "ops.h" 19 20 /* Create DMA buffer page table for DSP */ 21 static int create_page_table(struct snd_soc_component *component, 22 struct snd_pcm_substream *substream, 23 unsigned char *dma_area, size_t size) 24 { 25 struct snd_soc_pcm_runtime *rtd = substream->private_data; 26 struct snd_sof_pcm *spcm; 27 struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream); 28 int stream = substream->stream; 29 30 spcm = snd_sof_find_spcm_dai(component, rtd); 31 if (!spcm) 32 return -EINVAL; 33 34 return snd_sof_create_page_table(component->dev, dmab, 35 spcm->stream[stream].page_table.area, size); 36 } 37 38 static int sof_pcm_dsp_params(struct snd_sof_pcm *spcm, struct snd_pcm_substream *substream, 39 const struct sof_ipc_pcm_params_reply *reply) 40 { 41 struct snd_soc_component *scomp = spcm->scomp; 42 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp); 43 44 /* validate offset */ 45 int ret = snd_sof_ipc_pcm_params(sdev, substream, reply); 46 47 if (ret < 0) 48 dev_err(scomp->dev, "error: got wrong reply for PCM %d\n", 49 spcm->pcm.pcm_id); 50 51 return ret; 52 } 53 54 /* 55 * sof pcm period elapse work 56 */ 57 static void sof_pcm_period_elapsed_work(struct work_struct *work) 58 { 59 struct snd_sof_pcm_stream *sps = 60 container_of(work, struct snd_sof_pcm_stream, 61 period_elapsed_work); 62 63 snd_pcm_period_elapsed(sps->substream); 64 } 65 66 /* 67 * sof pcm period elapse, this could be called at irq thread context. 68 */ 69 void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream) 70 { 71 struct snd_soc_pcm_runtime *rtd = substream->private_data; 72 struct snd_soc_component *component = 73 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME); 74 struct snd_sof_pcm *spcm; 75 76 spcm = snd_sof_find_spcm_dai(component, rtd); 77 if (!spcm) { 78 dev_err(component->dev, 79 "error: period elapsed for unknown stream!\n"); 80 return; 81 } 82 83 /* 84 * snd_pcm_period_elapsed() can be called in interrupt context 85 * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(), 86 * when the PCM is done draining or xrun happened, a STOP IPC will 87 * then be sent and this IPC will hit IPC timeout. 88 * To avoid sending IPC before the previous IPC is handled, we 89 * schedule delayed work here to call the snd_pcm_period_elapsed(). 90 */ 91 schedule_work(&spcm->stream[substream->stream].period_elapsed_work); 92 } 93 EXPORT_SYMBOL(snd_sof_pcm_period_elapsed); 94 95 /* this may get called several times by oss emulation */ 96 static int sof_pcm_hw_params(struct snd_soc_component *component, 97 struct snd_pcm_substream *substream, 98 struct snd_pcm_hw_params *params) 99 { 100 struct snd_soc_pcm_runtime *rtd = substream->private_data; 101 struct snd_pcm_runtime *runtime = substream->runtime; 102 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 103 struct snd_sof_pcm *spcm; 104 struct sof_ipc_pcm_params pcm; 105 struct sof_ipc_pcm_params_reply ipc_params_reply; 106 int ret; 107 108 /* nothing to do for BE */ 109 if (rtd->dai_link->no_pcm) 110 return 0; 111 112 spcm = snd_sof_find_spcm_dai(component, rtd); 113 if (!spcm) 114 return -EINVAL; 115 116 dev_dbg(component->dev, "pcm: hw params stream %d dir %d\n", 117 spcm->pcm.pcm_id, substream->stream); 118 119 memset(&pcm, 0, sizeof(pcm)); 120 121 /* allocate audio buffer pages */ 122 ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); 123 if (ret < 0) { 124 dev_err(component->dev, "error: could not allocate %d bytes for PCM %d\n", 125 params_buffer_bytes(params), spcm->pcm.pcm_id); 126 return ret; 127 } 128 if (ret) { 129 /* 130 * ret == 1 means the buffer is changed 131 * create compressed page table for audio firmware 132 * ret == 0 means the buffer is not changed 133 * so no need to regenerate the page table 134 */ 135 ret = create_page_table(component, substream, runtime->dma_area, 136 runtime->dma_bytes); 137 if (ret < 0) 138 return ret; 139 } 140 141 /* number of pages should be rounded up */ 142 pcm.params.buffer.pages = PFN_UP(runtime->dma_bytes); 143 144 /* set IPC PCM parameters */ 145 pcm.hdr.size = sizeof(pcm); 146 pcm.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS; 147 pcm.comp_id = spcm->stream[substream->stream].comp_id; 148 pcm.params.hdr.size = sizeof(pcm.params); 149 pcm.params.buffer.phy_addr = 150 spcm->stream[substream->stream].page_table.addr; 151 pcm.params.buffer.size = runtime->dma_bytes; 152 pcm.params.direction = substream->stream; 153 pcm.params.sample_valid_bytes = params_width(params) >> 3; 154 pcm.params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED; 155 pcm.params.rate = params_rate(params); 156 pcm.params.channels = params_channels(params); 157 pcm.params.host_period_bytes = params_period_bytes(params); 158 159 /* container size */ 160 ret = snd_pcm_format_physical_width(params_format(params)); 161 if (ret < 0) 162 return ret; 163 pcm.params.sample_container_bytes = ret >> 3; 164 165 /* format */ 166 switch (params_format(params)) { 167 case SNDRV_PCM_FORMAT_S16: 168 pcm.params.frame_fmt = SOF_IPC_FRAME_S16_LE; 169 break; 170 case SNDRV_PCM_FORMAT_S24: 171 pcm.params.frame_fmt = SOF_IPC_FRAME_S24_4LE; 172 break; 173 case SNDRV_PCM_FORMAT_S32: 174 pcm.params.frame_fmt = SOF_IPC_FRAME_S32_LE; 175 break; 176 case SNDRV_PCM_FORMAT_FLOAT: 177 pcm.params.frame_fmt = SOF_IPC_FRAME_FLOAT; 178 break; 179 default: 180 return -EINVAL; 181 } 182 183 /* firmware already configured host stream */ 184 ret = snd_sof_pcm_platform_hw_params(sdev, 185 substream, 186 params, 187 &pcm.params); 188 if (ret < 0) { 189 dev_err(component->dev, "error: platform hw params failed\n"); 190 return ret; 191 } 192 193 dev_dbg(component->dev, "stream_tag %d", pcm.params.stream_tag); 194 195 /* send IPC to the DSP */ 196 ret = sof_ipc_tx_message(sdev->ipc, pcm.hdr.cmd, &pcm, sizeof(pcm), 197 &ipc_params_reply, sizeof(ipc_params_reply)); 198 if (ret < 0) { 199 dev_err(component->dev, "error: hw params ipc failed for stream %d\n", 200 pcm.params.stream_tag); 201 return ret; 202 } 203 204 ret = sof_pcm_dsp_params(spcm, substream, &ipc_params_reply); 205 if (ret < 0) 206 return ret; 207 208 spcm->prepared[substream->stream] = true; 209 210 /* save pcm hw_params */ 211 memcpy(&spcm->params[substream->stream], params, sizeof(*params)); 212 213 return ret; 214 } 215 216 static int sof_pcm_dsp_pcm_free(struct snd_pcm_substream *substream, 217 struct snd_sof_dev *sdev, 218 struct snd_sof_pcm *spcm) 219 { 220 struct sof_ipc_stream stream; 221 struct sof_ipc_reply reply; 222 int ret; 223 224 stream.hdr.size = sizeof(stream); 225 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE; 226 stream.comp_id = spcm->stream[substream->stream].comp_id; 227 228 /* send IPC to the DSP */ 229 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream, 230 sizeof(stream), &reply, sizeof(reply)); 231 if (!ret) 232 spcm->prepared[substream->stream] = false; 233 234 return ret; 235 } 236 237 static int sof_pcm_hw_free(struct snd_soc_component *component, 238 struct snd_pcm_substream *substream) 239 { 240 struct snd_soc_pcm_runtime *rtd = substream->private_data; 241 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 242 struct snd_sof_pcm *spcm; 243 int ret, err = 0; 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 dev_dbg(component->dev, "pcm: free stream %d dir %d\n", 254 spcm->pcm.pcm_id, substream->stream); 255 256 if (spcm->prepared[substream->stream]) { 257 ret = sof_pcm_dsp_pcm_free(substream, sdev, spcm); 258 if (ret < 0) 259 err = ret; 260 } 261 262 snd_pcm_lib_free_pages(substream); 263 264 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work); 265 266 ret = snd_sof_pcm_platform_hw_free(sdev, substream); 267 if (ret < 0) { 268 dev_err(component->dev, "error: platform hw free failed\n"); 269 err = ret; 270 } 271 272 return err; 273 } 274 275 static int sof_pcm_prepare(struct snd_soc_component *component, 276 struct snd_pcm_substream *substream) 277 { 278 struct snd_soc_pcm_runtime *rtd = substream->private_data; 279 struct snd_sof_pcm *spcm; 280 int ret; 281 282 /* nothing to do for BE */ 283 if (rtd->dai_link->no_pcm) 284 return 0; 285 286 spcm = snd_sof_find_spcm_dai(component, rtd); 287 if (!spcm) 288 return -EINVAL; 289 290 if (spcm->prepared[substream->stream]) 291 return 0; 292 293 dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n", 294 spcm->pcm.pcm_id, substream->stream); 295 296 /* set hw_params */ 297 ret = sof_pcm_hw_params(component, 298 substream, &spcm->params[substream->stream]); 299 if (ret < 0) { 300 dev_err(component->dev, 301 "error: set pcm hw_params after resume\n"); 302 return ret; 303 } 304 305 return 0; 306 } 307 308 /* 309 * FE dai link trigger actions are always executed in non-atomic context because 310 * they involve IPC's. 311 */ 312 static int sof_pcm_trigger(struct snd_soc_component *component, 313 struct snd_pcm_substream *substream, int cmd) 314 { 315 struct snd_soc_pcm_runtime *rtd = substream->private_data; 316 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 317 struct snd_sof_pcm *spcm; 318 struct sof_ipc_stream stream; 319 struct sof_ipc_reply reply; 320 bool reset_hw_params = false; 321 bool ipc_first = false; 322 int ret; 323 324 /* nothing to do for BE */ 325 if (rtd->dai_link->no_pcm) 326 return 0; 327 328 spcm = snd_sof_find_spcm_dai(component, rtd); 329 if (!spcm) 330 return -EINVAL; 331 332 dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n", 333 spcm->pcm.pcm_id, substream->stream, cmd); 334 335 stream.hdr.size = sizeof(stream); 336 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG; 337 stream.comp_id = spcm->stream[substream->stream].comp_id; 338 339 switch (cmd) { 340 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 341 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE; 342 ipc_first = true; 343 break; 344 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 345 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE; 346 break; 347 case SNDRV_PCM_TRIGGER_RESUME: 348 if (spcm->stream[substream->stream].suspend_ignored) { 349 /* 350 * this case will be triggered when INFO_RESUME is 351 * supported, no need to resume streams that remained 352 * enabled in D0ix. 353 */ 354 spcm->stream[substream->stream].suspend_ignored = false; 355 return 0; 356 } 357 358 /* set up hw_params */ 359 ret = sof_pcm_prepare(component, substream); 360 if (ret < 0) { 361 dev_err(component->dev, 362 "error: failed to set up hw_params upon resume\n"); 363 return ret; 364 } 365 366 /* fallthrough */ 367 case SNDRV_PCM_TRIGGER_START: 368 if (spcm->stream[substream->stream].suspend_ignored) { 369 /* 370 * This case will be triggered when INFO_RESUME is 371 * not supported, no need to re-start streams that 372 * remained enabled in D0ix. 373 */ 374 spcm->stream[substream->stream].suspend_ignored = false; 375 return 0; 376 } 377 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START; 378 break; 379 case SNDRV_PCM_TRIGGER_SUSPEND: 380 if (sdev->s0_suspend && 381 spcm->stream[substream->stream].d0i3_compatible) { 382 /* 383 * trap the event, not sending trigger stop to 384 * prevent the FW pipelines from being stopped, 385 * and mark the flag to ignore the upcoming DAPM 386 * PM events. 387 */ 388 spcm->stream[substream->stream].suspend_ignored = true; 389 return 0; 390 } 391 /* fallthrough */ 392 case SNDRV_PCM_TRIGGER_STOP: 393 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP; 394 ipc_first = true; 395 reset_hw_params = true; 396 break; 397 default: 398 dev_err(component->dev, "error: unhandled trigger cmd %d\n", 399 cmd); 400 return -EINVAL; 401 } 402 403 /* 404 * DMA and IPC sequence is different for start and stop. Need to send 405 * STOP IPC before stop DMA 406 */ 407 if (!ipc_first) 408 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 409 410 /* send IPC to the DSP */ 411 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream, 412 sizeof(stream), &reply, sizeof(reply)); 413 414 /* need to STOP DMA even if STOP IPC failed */ 415 if (ipc_first) 416 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 417 418 /* free PCM if reset_hw_params is set and the STOP IPC is successful */ 419 if (!ret && reset_hw_params) 420 ret = sof_pcm_dsp_pcm_free(substream, sdev, spcm); 421 422 return ret; 423 } 424 425 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component, 426 struct snd_pcm_substream *substream) 427 { 428 struct snd_soc_pcm_runtime *rtd = substream->private_data; 429 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 430 struct snd_sof_pcm *spcm; 431 snd_pcm_uframes_t host, dai; 432 433 /* nothing to do for BE */ 434 if (rtd->dai_link->no_pcm) 435 return 0; 436 437 /* use dsp ops pointer callback directly if set */ 438 if (sof_ops(sdev)->pcm_pointer) 439 return sof_ops(sdev)->pcm_pointer(sdev, substream); 440 441 spcm = snd_sof_find_spcm_dai(component, rtd); 442 if (!spcm) 443 return -EINVAL; 444 445 /* read position from DSP */ 446 host = bytes_to_frames(substream->runtime, 447 spcm->stream[substream->stream].posn.host_posn); 448 dai = bytes_to_frames(substream->runtime, 449 spcm->stream[substream->stream].posn.dai_posn); 450 451 dev_dbg(component->dev, 452 "PCM: stream %d dir %d DMA position %lu DAI position %lu\n", 453 spcm->pcm.pcm_id, substream->stream, host, dai); 454 455 return host; 456 } 457 458 static int sof_pcm_open(struct snd_soc_component *component, 459 struct snd_pcm_substream *substream) 460 { 461 struct snd_soc_pcm_runtime *rtd = substream->private_data; 462 struct snd_pcm_runtime *runtime = substream->runtime; 463 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 464 const struct snd_sof_dsp_ops *ops = sof_ops(sdev); 465 struct snd_sof_pcm *spcm; 466 struct snd_soc_tplg_stream_caps *caps; 467 int ret; 468 469 /* nothing to do for BE */ 470 if (rtd->dai_link->no_pcm) 471 return 0; 472 473 spcm = snd_sof_find_spcm_dai(component, rtd); 474 if (!spcm) 475 return -EINVAL; 476 477 dev_dbg(component->dev, "pcm: open stream %d dir %d\n", 478 spcm->pcm.pcm_id, substream->stream); 479 480 INIT_WORK(&spcm->stream[substream->stream].period_elapsed_work, 481 sof_pcm_period_elapsed_work); 482 483 caps = &spcm->pcm.caps[substream->stream]; 484 485 /* set any runtime constraints based on topology */ 486 snd_pcm_hw_constraint_step(substream->runtime, 0, 487 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 488 le32_to_cpu(caps->period_size_min)); 489 snd_pcm_hw_constraint_step(substream->runtime, 0, 490 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 491 le32_to_cpu(caps->period_size_min)); 492 493 /* set runtime config */ 494 runtime->hw.info = ops->hw_info; /* platform-specific */ 495 496 runtime->hw.formats = le64_to_cpu(caps->formats); 497 runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min); 498 runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max); 499 runtime->hw.periods_min = le32_to_cpu(caps->periods_min); 500 runtime->hw.periods_max = le32_to_cpu(caps->periods_max); 501 502 /* 503 * caps->buffer_size_min is not used since the 504 * snd_pcm_hardware structure only defines buffer_bytes_max 505 */ 506 runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max); 507 508 dev_dbg(component->dev, "period min %zd max %zd bytes\n", 509 runtime->hw.period_bytes_min, 510 runtime->hw.period_bytes_max); 511 dev_dbg(component->dev, "period count %d max %d\n", 512 runtime->hw.periods_min, 513 runtime->hw.periods_max); 514 dev_dbg(component->dev, "buffer max %zd bytes\n", 515 runtime->hw.buffer_bytes_max); 516 517 /* set wait time - TODO: come from topology */ 518 substream->wait_time = 500; 519 520 spcm->stream[substream->stream].posn.host_posn = 0; 521 spcm->stream[substream->stream].posn.dai_posn = 0; 522 spcm->stream[substream->stream].substream = substream; 523 spcm->prepared[substream->stream] = false; 524 525 ret = snd_sof_pcm_platform_open(sdev, substream); 526 if (ret < 0) 527 dev_err(component->dev, "error: pcm open failed %d\n", ret); 528 529 return ret; 530 } 531 532 static int sof_pcm_close(struct snd_soc_component *component, 533 struct snd_pcm_substream *substream) 534 { 535 struct snd_soc_pcm_runtime *rtd = substream->private_data; 536 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 537 struct snd_sof_pcm *spcm; 538 int err; 539 540 /* nothing to do for BE */ 541 if (rtd->dai_link->no_pcm) 542 return 0; 543 544 spcm = snd_sof_find_spcm_dai(component, rtd); 545 if (!spcm) 546 return -EINVAL; 547 548 dev_dbg(component->dev, "pcm: close stream %d dir %d\n", 549 spcm->pcm.pcm_id, substream->stream); 550 551 err = snd_sof_pcm_platform_close(sdev, substream); 552 if (err < 0) { 553 dev_err(component->dev, "error: pcm close failed %d\n", 554 err); 555 /* 556 * keep going, no point in preventing the close 557 * from happening 558 */ 559 } 560 561 return 0; 562 } 563 564 /* 565 * Pre-allocate playback/capture audio buffer pages. 566 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free 567 * snd_pcm_lib_preallocate_free_for_all() is called by the core. 568 */ 569 static int sof_pcm_new(struct snd_soc_component *component, 570 struct snd_soc_pcm_runtime *rtd) 571 { 572 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 573 struct snd_sof_pcm *spcm; 574 struct snd_pcm *pcm = rtd->pcm; 575 struct snd_soc_tplg_stream_caps *caps; 576 int stream = SNDRV_PCM_STREAM_PLAYBACK; 577 578 /* find SOF PCM for this RTD */ 579 spcm = snd_sof_find_spcm_dai(component, rtd); 580 if (!spcm) { 581 dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n", 582 rtd->dai_link->id); 583 return 0; 584 } 585 586 dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name); 587 588 /* do we need to pre-allocate playback audio buffer pages */ 589 if (!spcm->pcm.playback) 590 goto capture; 591 592 caps = &spcm->pcm.caps[stream]; 593 594 /* pre-allocate playback audio buffer pages */ 595 dev_dbg(component->dev, 596 "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n", 597 caps->name, caps->buffer_size_min, caps->buffer_size_max); 598 599 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 600 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 601 le32_to_cpu(caps->buffer_size_min), 602 le32_to_cpu(caps->buffer_size_max)); 603 capture: 604 stream = SNDRV_PCM_STREAM_CAPTURE; 605 606 /* do we need to pre-allocate capture audio buffer pages */ 607 if (!spcm->pcm.capture) 608 return 0; 609 610 caps = &spcm->pcm.caps[stream]; 611 612 /* pre-allocate capture audio buffer pages */ 613 dev_dbg(component->dev, 614 "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n", 615 caps->name, caps->buffer_size_min, caps->buffer_size_max); 616 617 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 618 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 619 le32_to_cpu(caps->buffer_size_min), 620 le32_to_cpu(caps->buffer_size_max)); 621 622 return 0; 623 } 624 625 /* fixup the BE DAI link to match any values from topology */ 626 static int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, 627 struct snd_pcm_hw_params *params) 628 { 629 struct snd_interval *rate = hw_param_interval(params, 630 SNDRV_PCM_HW_PARAM_RATE); 631 struct snd_interval *channels = hw_param_interval(params, 632 SNDRV_PCM_HW_PARAM_CHANNELS); 633 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 634 struct snd_soc_component *component = 635 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME); 636 struct snd_sof_dai *dai = 637 snd_sof_find_dai(component, (char *)rtd->dai_link->name); 638 639 /* no topology exists for this BE, try a common configuration */ 640 if (!dai) { 641 dev_warn(component->dev, 642 "warning: no topology found for BE DAI %s config\n", 643 rtd->dai_link->name); 644 645 /* set 48k, stereo, 16bits by default */ 646 rate->min = 48000; 647 rate->max = 48000; 648 649 channels->min = 2; 650 channels->max = 2; 651 652 snd_mask_none(fmt); 653 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 654 655 return 0; 656 } 657 658 /* read format from topology */ 659 snd_mask_none(fmt); 660 661 switch (dai->comp_dai.config.frame_fmt) { 662 case SOF_IPC_FRAME_S16_LE: 663 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 664 break; 665 case SOF_IPC_FRAME_S24_4LE: 666 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE); 667 break; 668 case SOF_IPC_FRAME_S32_LE: 669 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S32_LE); 670 break; 671 default: 672 dev_err(component->dev, "error: No available DAI format!\n"); 673 return -EINVAL; 674 } 675 676 /* read rate and channels from topology */ 677 switch (dai->dai_config->type) { 678 case SOF_DAI_INTEL_SSP: 679 rate->min = dai->dai_config->ssp.fsync_rate; 680 rate->max = dai->dai_config->ssp.fsync_rate; 681 channels->min = dai->dai_config->ssp.tdm_slots; 682 channels->max = dai->dai_config->ssp.tdm_slots; 683 684 dev_dbg(component->dev, 685 "rate_min: %d rate_max: %d\n", rate->min, rate->max); 686 dev_dbg(component->dev, 687 "channels_min: %d channels_max: %d\n", 688 channels->min, channels->max); 689 690 break; 691 case SOF_DAI_INTEL_DMIC: 692 /* DMIC only supports 16 or 32 bit formats */ 693 if (dai->comp_dai.config.frame_fmt == SOF_IPC_FRAME_S24_4LE) { 694 dev_err(component->dev, 695 "error: invalid fmt %d for DAI type %d\n", 696 dai->comp_dai.config.frame_fmt, 697 dai->dai_config->type); 698 } 699 break; 700 case SOF_DAI_INTEL_HDA: 701 /* do nothing for HDA dai_link */ 702 break; 703 case SOF_DAI_INTEL_ALH: 704 /* do nothing for ALH dai_link */ 705 break; 706 case SOF_DAI_IMX_ESAI: 707 channels->min = dai->dai_config->esai.tdm_slots; 708 channels->max = dai->dai_config->esai.tdm_slots; 709 710 dev_dbg(component->dev, 711 "channels_min: %d channels_max: %d\n", 712 channels->min, channels->max); 713 break; 714 default: 715 dev_err(component->dev, "error: invalid DAI type %d\n", 716 dai->dai_config->type); 717 break; 718 } 719 720 return 0; 721 } 722 723 static int sof_pcm_probe(struct snd_soc_component *component) 724 { 725 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 726 struct snd_sof_pdata *plat_data = sdev->pdata; 727 const char *tplg_filename; 728 int ret; 729 730 /* load the default topology */ 731 sdev->component = component; 732 733 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL, 734 "%s/%s", 735 plat_data->tplg_filename_prefix, 736 plat_data->tplg_filename); 737 if (!tplg_filename) 738 return -ENOMEM; 739 740 ret = snd_sof_load_topology(component, tplg_filename); 741 if (ret < 0) { 742 dev_err(component->dev, "error: failed to load DSP topology %d\n", 743 ret); 744 return ret; 745 } 746 747 return ret; 748 } 749 750 static void sof_pcm_remove(struct snd_soc_component *component) 751 { 752 /* remove topology */ 753 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL); 754 } 755 756 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev) 757 { 758 struct snd_soc_component_driver *pd = &sdev->plat_drv; 759 struct snd_sof_pdata *plat_data = sdev->pdata; 760 const char *drv_name; 761 762 drv_name = plat_data->machine->drv_name; 763 764 pd->name = "sof-audio-component"; 765 pd->probe = sof_pcm_probe; 766 pd->remove = sof_pcm_remove; 767 pd->open = sof_pcm_open; 768 pd->close = sof_pcm_close; 769 pd->ioctl = snd_soc_pcm_lib_ioctl; 770 pd->hw_params = sof_pcm_hw_params; 771 pd->prepare = sof_pcm_prepare; 772 pd->hw_free = sof_pcm_hw_free; 773 pd->trigger = sof_pcm_trigger; 774 pd->pointer = sof_pcm_pointer; 775 776 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS) 777 pd->compr_ops = &sof_compressed_ops; 778 #endif 779 pd->pcm_construct = sof_pcm_new; 780 pd->ignore_machine = drv_name; 781 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup; 782 pd->be_pcm_base = SOF_BE_PCM_BASE; 783 pd->use_dai_pcm_id = true; 784 pd->topology_name_prefix = "sof"; 785 786 /* increment module refcount when a pcm is opened */ 787 pd->module_get_upon_open = 1; 788 } 789