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 "ops.h" 18 19 #define DRV_NAME "sof-audio-component" 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 = substream->private_data; 27 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 28 struct snd_sof_pcm *spcm; 29 struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream); 30 int stream = substream->stream; 31 32 spcm = snd_sof_find_spcm_dai(sdev, rtd); 33 if (!spcm) 34 return -EINVAL; 35 36 return snd_sof_create_page_table(sdev, dmab, 37 spcm->stream[stream].page_table.area, size); 38 } 39 40 static int sof_pcm_dsp_params(struct snd_sof_pcm *spcm, struct snd_pcm_substream *substream, 41 const struct sof_ipc_pcm_params_reply *reply) 42 { 43 struct snd_sof_dev *sdev = spcm->sdev; 44 /* validate offset */ 45 int ret = snd_sof_ipc_pcm_params(sdev, substream, reply); 46 47 if (ret < 0) 48 dev_err(sdev->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, DRV_NAME); 74 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 75 struct snd_sof_pcm *spcm; 76 77 spcm = snd_sof_find_spcm_dai(sdev, rtd); 78 if (!spcm) { 79 dev_err(sdev->dev, 80 "error: period elapsed for unknown stream!\n"); 81 return; 82 } 83 84 /* 85 * snd_pcm_period_elapsed() can be called in interrupt context 86 * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(), 87 * when the PCM is done draining or xrun happened, a STOP IPC will 88 * then be sent and this IPC will hit IPC timeout. 89 * To avoid sending IPC before the previous IPC is handled, we 90 * schedule delayed work here to call the snd_pcm_period_elapsed(). 91 */ 92 schedule_work(&spcm->stream[substream->stream].period_elapsed_work); 93 } 94 EXPORT_SYMBOL(snd_sof_pcm_period_elapsed); 95 96 /* this may get called several times by oss emulation */ 97 static int sof_pcm_hw_params(struct snd_soc_component *component, 98 struct snd_pcm_substream *substream, 99 struct snd_pcm_hw_params *params) 100 { 101 struct snd_soc_pcm_runtime *rtd = substream->private_data; 102 struct snd_pcm_runtime *runtime = substream->runtime; 103 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 104 struct snd_sof_pcm *spcm; 105 struct sof_ipc_pcm_params pcm; 106 struct sof_ipc_pcm_params_reply ipc_params_reply; 107 int ret; 108 109 /* nothing to do for BE */ 110 if (rtd->dai_link->no_pcm) 111 return 0; 112 113 spcm = snd_sof_find_spcm_dai(sdev, rtd); 114 if (!spcm) 115 return -EINVAL; 116 117 dev_dbg(sdev->dev, "pcm: hw params stream %d dir %d\n", 118 spcm->pcm.pcm_id, substream->stream); 119 120 memset(&pcm, 0, sizeof(pcm)); 121 122 /* allocate audio buffer pages */ 123 ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); 124 if (ret < 0) { 125 dev_err(sdev->dev, "error: could not allocate %d bytes for PCM %d\n", 126 params_buffer_bytes(params), spcm->pcm.pcm_id); 127 return ret; 128 } 129 if (ret) { 130 /* 131 * ret == 1 means the buffer is changed 132 * create compressed page table for audio firmware 133 * ret == 0 means the buffer is not changed 134 * so no need to regenerate the page table 135 */ 136 ret = create_page_table(component, substream, runtime->dma_area, 137 runtime->dma_bytes); 138 if (ret < 0) 139 return ret; 140 } 141 142 /* number of pages should be rounded up */ 143 pcm.params.buffer.pages = PFN_UP(runtime->dma_bytes); 144 145 /* set IPC PCM parameters */ 146 pcm.hdr.size = sizeof(pcm); 147 pcm.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS; 148 pcm.comp_id = spcm->stream[substream->stream].comp_id; 149 pcm.params.hdr.size = sizeof(pcm.params); 150 pcm.params.buffer.phy_addr = 151 spcm->stream[substream->stream].page_table.addr; 152 pcm.params.buffer.size = runtime->dma_bytes; 153 pcm.params.direction = substream->stream; 154 pcm.params.sample_valid_bytes = params_width(params) >> 3; 155 pcm.params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED; 156 pcm.params.rate = params_rate(params); 157 pcm.params.channels = params_channels(params); 158 pcm.params.host_period_bytes = params_period_bytes(params); 159 160 /* container size */ 161 ret = snd_pcm_format_physical_width(params_format(params)); 162 if (ret < 0) 163 return ret; 164 pcm.params.sample_container_bytes = ret >> 3; 165 166 /* format */ 167 switch (params_format(params)) { 168 case SNDRV_PCM_FORMAT_S16: 169 pcm.params.frame_fmt = SOF_IPC_FRAME_S16_LE; 170 break; 171 case SNDRV_PCM_FORMAT_S24: 172 pcm.params.frame_fmt = SOF_IPC_FRAME_S24_4LE; 173 break; 174 case SNDRV_PCM_FORMAT_S32: 175 pcm.params.frame_fmt = SOF_IPC_FRAME_S32_LE; 176 break; 177 case SNDRV_PCM_FORMAT_FLOAT: 178 pcm.params.frame_fmt = SOF_IPC_FRAME_FLOAT; 179 break; 180 default: 181 return -EINVAL; 182 } 183 184 /* firmware already configured host stream */ 185 ret = snd_sof_pcm_platform_hw_params(sdev, 186 substream, 187 params, 188 &pcm.params); 189 if (ret < 0) { 190 dev_err(sdev->dev, "error: platform hw params failed\n"); 191 return ret; 192 } 193 194 dev_dbg(sdev->dev, "stream_tag %d", pcm.params.stream_tag); 195 196 /* send IPC to the DSP */ 197 ret = sof_ipc_tx_message(sdev->ipc, pcm.hdr.cmd, &pcm, sizeof(pcm), 198 &ipc_params_reply, sizeof(ipc_params_reply)); 199 if (ret < 0) { 200 dev_err(sdev->dev, "error: hw params ipc failed for stream %d\n", 201 pcm.params.stream_tag); 202 return ret; 203 } 204 205 ret = sof_pcm_dsp_params(spcm, substream, &ipc_params_reply); 206 if (ret < 0) 207 return ret; 208 209 spcm->prepared[substream->stream] = true; 210 211 /* save pcm hw_params */ 212 memcpy(&spcm->params[substream->stream], params, sizeof(*params)); 213 214 return ret; 215 } 216 217 static int sof_pcm_dsp_pcm_free(struct snd_pcm_substream *substream, 218 struct snd_sof_dev *sdev, 219 struct snd_sof_pcm *spcm) 220 { 221 struct sof_ipc_stream stream; 222 struct sof_ipc_reply reply; 223 int ret; 224 225 stream.hdr.size = sizeof(stream); 226 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE; 227 stream.comp_id = spcm->stream[substream->stream].comp_id; 228 229 /* send IPC to the DSP */ 230 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream, 231 sizeof(stream), &reply, sizeof(reply)); 232 if (!ret) 233 spcm->prepared[substream->stream] = false; 234 235 return ret; 236 } 237 238 static int sof_pcm_hw_free(struct snd_soc_component *component, 239 struct snd_pcm_substream *substream) 240 { 241 struct snd_soc_pcm_runtime *rtd = substream->private_data; 242 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 243 struct snd_sof_pcm *spcm; 244 int ret, err = 0; 245 246 /* nothing to do for BE */ 247 if (rtd->dai_link->no_pcm) 248 return 0; 249 250 spcm = snd_sof_find_spcm_dai(sdev, rtd); 251 if (!spcm) 252 return -EINVAL; 253 254 dev_dbg(sdev->dev, "pcm: free stream %d dir %d\n", spcm->pcm.pcm_id, 255 substream->stream); 256 257 if (spcm->prepared[substream->stream]) { 258 ret = sof_pcm_dsp_pcm_free(substream, sdev, spcm); 259 if (ret < 0) 260 err = ret; 261 } 262 263 snd_pcm_lib_free_pages(substream); 264 265 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work); 266 267 ret = snd_sof_pcm_platform_hw_free(sdev, substream); 268 if (ret < 0) { 269 dev_err(sdev->dev, "error: platform hw free failed\n"); 270 err = ret; 271 } 272 273 return err; 274 } 275 276 static int sof_pcm_prepare(struct snd_soc_component *component, 277 struct snd_pcm_substream *substream) 278 { 279 struct snd_soc_pcm_runtime *rtd = substream->private_data; 280 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 281 struct snd_sof_pcm *spcm; 282 int ret; 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(sdev, rtd); 289 if (!spcm) 290 return -EINVAL; 291 292 if (spcm->prepared[substream->stream]) 293 return 0; 294 295 dev_dbg(sdev->dev, "pcm: prepare stream %d dir %d\n", spcm->pcm.pcm_id, 296 substream->stream); 297 298 /* set hw_params */ 299 ret = sof_pcm_hw_params(component, 300 substream, &spcm->params[substream->stream]); 301 if (ret < 0) { 302 dev_err(sdev->dev, "error: set pcm hw_params after resume\n"); 303 return ret; 304 } 305 306 return 0; 307 } 308 309 /* 310 * FE dai link trigger actions are always executed in non-atomic context because 311 * they involve IPC's. 312 */ 313 static int sof_pcm_trigger(struct snd_soc_component *component, 314 struct snd_pcm_substream *substream, int cmd) 315 { 316 struct snd_soc_pcm_runtime *rtd = substream->private_data; 317 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 318 struct snd_sof_pcm *spcm; 319 struct sof_ipc_stream stream; 320 struct sof_ipc_reply reply; 321 bool reset_hw_params = false; 322 bool ipc_first = false; 323 int ret; 324 325 /* nothing to do for BE */ 326 if (rtd->dai_link->no_pcm) 327 return 0; 328 329 spcm = snd_sof_find_spcm_dai(sdev, rtd); 330 if (!spcm) 331 return -EINVAL; 332 333 dev_dbg(sdev->dev, "pcm: trigger stream %d dir %d cmd %d\n", 334 spcm->pcm.pcm_id, substream->stream, cmd); 335 336 stream.hdr.size = sizeof(stream); 337 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG; 338 stream.comp_id = spcm->stream[substream->stream].comp_id; 339 340 switch (cmd) { 341 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 342 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE; 343 ipc_first = true; 344 break; 345 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 346 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE; 347 break; 348 case SNDRV_PCM_TRIGGER_RESUME: 349 if (spcm->stream[substream->stream].suspend_ignored) { 350 /* 351 * this case will be triggered when INFO_RESUME is 352 * supported, no need to resume streams that remained 353 * enabled in D0ix. 354 */ 355 spcm->stream[substream->stream].suspend_ignored = false; 356 return 0; 357 } 358 359 /* set up hw_params */ 360 ret = sof_pcm_prepare(component, substream); 361 if (ret < 0) { 362 dev_err(sdev->dev, 363 "error: failed to set up hw_params upon resume\n"); 364 return ret; 365 } 366 367 /* fallthrough */ 368 case SNDRV_PCM_TRIGGER_START: 369 if (spcm->stream[substream->stream].suspend_ignored) { 370 /* 371 * This case will be triggered when INFO_RESUME is 372 * not supported, no need to re-start streams that 373 * remained enabled in D0ix. 374 */ 375 spcm->stream[substream->stream].suspend_ignored = false; 376 return 0; 377 } 378 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START; 379 break; 380 case SNDRV_PCM_TRIGGER_SUSPEND: 381 if (sdev->s0_suspend && 382 spcm->stream[substream->stream].d0i3_compatible) { 383 /* 384 * trap the event, not sending trigger stop to 385 * prevent the FW pipelines from being stopped, 386 * and mark the flag to ignore the upcoming DAPM 387 * PM events. 388 */ 389 spcm->stream[substream->stream].suspend_ignored = true; 390 return 0; 391 } 392 /* fallthrough */ 393 case SNDRV_PCM_TRIGGER_STOP: 394 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP; 395 ipc_first = true; 396 reset_hw_params = true; 397 break; 398 default: 399 dev_err(sdev->dev, "error: unhandled trigger cmd %d\n", 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(sdev, 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(sdev->dev, "PCM: stream %d dir %d DMA position %lu DAI position %lu\n", 452 spcm->pcm.pcm_id, substream->stream, host, dai); 453 454 return host; 455 } 456 457 static int sof_pcm_open(struct snd_soc_component *component, 458 struct snd_pcm_substream *substream) 459 { 460 struct snd_soc_pcm_runtime *rtd = substream->private_data; 461 struct snd_pcm_runtime *runtime = substream->runtime; 462 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 463 const struct snd_sof_dsp_ops *ops = sof_ops(sdev); 464 struct snd_sof_pcm *spcm; 465 struct snd_soc_tplg_stream_caps *caps; 466 int ret; 467 468 /* nothing to do for BE */ 469 if (rtd->dai_link->no_pcm) 470 return 0; 471 472 spcm = snd_sof_find_spcm_dai(sdev, rtd); 473 if (!spcm) 474 return -EINVAL; 475 476 dev_dbg(sdev->dev, "pcm: open stream %d dir %d\n", spcm->pcm.pcm_id, 477 substream->stream); 478 479 INIT_WORK(&spcm->stream[substream->stream].period_elapsed_work, 480 sof_pcm_period_elapsed_work); 481 482 caps = &spcm->pcm.caps[substream->stream]; 483 484 /* set any runtime constraints based on topology */ 485 snd_pcm_hw_constraint_step(substream->runtime, 0, 486 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 487 le32_to_cpu(caps->period_size_min)); 488 snd_pcm_hw_constraint_step(substream->runtime, 0, 489 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 490 le32_to_cpu(caps->period_size_min)); 491 492 /* set runtime config */ 493 runtime->hw.info = ops->hw_info; /* platform-specific */ 494 495 runtime->hw.formats = le64_to_cpu(caps->formats); 496 runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min); 497 runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max); 498 runtime->hw.periods_min = le32_to_cpu(caps->periods_min); 499 runtime->hw.periods_max = le32_to_cpu(caps->periods_max); 500 501 /* 502 * caps->buffer_size_min is not used since the 503 * snd_pcm_hardware structure only defines buffer_bytes_max 504 */ 505 runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max); 506 507 dev_dbg(sdev->dev, "period min %zd max %zd bytes\n", 508 runtime->hw.period_bytes_min, 509 runtime->hw.period_bytes_max); 510 dev_dbg(sdev->dev, "period count %d max %d\n", 511 runtime->hw.periods_min, 512 runtime->hw.periods_max); 513 dev_dbg(sdev->dev, "buffer max %zd bytes\n", 514 runtime->hw.buffer_bytes_max); 515 516 /* set wait time - TODO: come from topology */ 517 substream->wait_time = 500; 518 519 spcm->stream[substream->stream].posn.host_posn = 0; 520 spcm->stream[substream->stream].posn.dai_posn = 0; 521 spcm->stream[substream->stream].substream = substream; 522 spcm->prepared[substream->stream] = false; 523 524 ret = snd_sof_pcm_platform_open(sdev, substream); 525 if (ret < 0) 526 dev_err(sdev->dev, "error: pcm open failed %d\n", ret); 527 528 return ret; 529 } 530 531 static int sof_pcm_close(struct snd_soc_component *component, 532 struct snd_pcm_substream *substream) 533 { 534 struct snd_soc_pcm_runtime *rtd = substream->private_data; 535 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 536 struct snd_sof_pcm *spcm; 537 int err; 538 539 /* nothing to do for BE */ 540 if (rtd->dai_link->no_pcm) 541 return 0; 542 543 spcm = snd_sof_find_spcm_dai(sdev, rtd); 544 if (!spcm) 545 return -EINVAL; 546 547 dev_dbg(sdev->dev, "pcm: close stream %d dir %d\n", spcm->pcm.pcm_id, 548 substream->stream); 549 550 err = snd_sof_pcm_platform_close(sdev, substream); 551 if (err < 0) { 552 dev_err(sdev->dev, "error: pcm close failed %d\n", 553 err); 554 /* 555 * keep going, no point in preventing the close 556 * from happening 557 */ 558 } 559 560 return 0; 561 } 562 563 /* 564 * Pre-allocate playback/capture audio buffer pages. 565 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free 566 * snd_pcm_lib_preallocate_free_for_all() is called by the core. 567 */ 568 static int sof_pcm_new(struct snd_soc_component *component, 569 struct snd_soc_pcm_runtime *rtd) 570 { 571 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 572 struct snd_sof_pcm *spcm; 573 struct snd_pcm *pcm = rtd->pcm; 574 struct snd_soc_tplg_stream_caps *caps; 575 int stream = SNDRV_PCM_STREAM_PLAYBACK; 576 577 /* find SOF PCM for this RTD */ 578 spcm = snd_sof_find_spcm_dai(sdev, rtd); 579 if (!spcm) { 580 dev_warn(sdev->dev, "warn: can't find PCM with DAI ID %d\n", 581 rtd->dai_link->id); 582 return 0; 583 } 584 585 dev_dbg(sdev->dev, "creating new PCM %s\n", spcm->pcm.pcm_name); 586 587 /* do we need to pre-allocate playback audio buffer pages */ 588 if (!spcm->pcm.playback) 589 goto capture; 590 591 caps = &spcm->pcm.caps[stream]; 592 593 /* pre-allocate playback audio buffer pages */ 594 dev_dbg(sdev->dev, "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n", 595 caps->name, caps->buffer_size_min, caps->buffer_size_max); 596 597 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 598 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 599 le32_to_cpu(caps->buffer_size_min), 600 le32_to_cpu(caps->buffer_size_max)); 601 capture: 602 stream = SNDRV_PCM_STREAM_CAPTURE; 603 604 /* do we need to pre-allocate capture audio buffer pages */ 605 if (!spcm->pcm.capture) 606 return 0; 607 608 caps = &spcm->pcm.caps[stream]; 609 610 /* pre-allocate capture audio buffer pages */ 611 dev_dbg(sdev->dev, "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n", 612 caps->name, caps->buffer_size_min, caps->buffer_size_max); 613 614 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 615 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 616 le32_to_cpu(caps->buffer_size_min), 617 le32_to_cpu(caps->buffer_size_max)); 618 619 return 0; 620 } 621 622 /* fixup the BE DAI link to match any values from topology */ 623 static int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, 624 struct snd_pcm_hw_params *params) 625 { 626 struct snd_interval *rate = hw_param_interval(params, 627 SNDRV_PCM_HW_PARAM_RATE); 628 struct snd_interval *channels = hw_param_interval(params, 629 SNDRV_PCM_HW_PARAM_CHANNELS); 630 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 631 struct snd_soc_component *component = 632 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 633 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 634 struct snd_sof_dai *dai = 635 snd_sof_find_dai(sdev, (char *)rtd->dai_link->name); 636 637 /* no topology exists for this BE, try a common configuration */ 638 if (!dai) { 639 dev_warn(sdev->dev, "warning: no topology found for BE DAI %s config\n", 640 rtd->dai_link->name); 641 642 /* set 48k, stereo, 16bits by default */ 643 rate->min = 48000; 644 rate->max = 48000; 645 646 channels->min = 2; 647 channels->max = 2; 648 649 snd_mask_none(fmt); 650 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 651 652 return 0; 653 } 654 655 /* read format from topology */ 656 snd_mask_none(fmt); 657 658 switch (dai->comp_dai.config.frame_fmt) { 659 case SOF_IPC_FRAME_S16_LE: 660 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 661 break; 662 case SOF_IPC_FRAME_S24_4LE: 663 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE); 664 break; 665 case SOF_IPC_FRAME_S32_LE: 666 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S32_LE); 667 break; 668 default: 669 dev_err(sdev->dev, "error: No available DAI format!\n"); 670 return -EINVAL; 671 } 672 673 /* read rate and channels from topology */ 674 switch (dai->dai_config->type) { 675 case SOF_DAI_INTEL_SSP: 676 rate->min = dai->dai_config->ssp.fsync_rate; 677 rate->max = dai->dai_config->ssp.fsync_rate; 678 channels->min = dai->dai_config->ssp.tdm_slots; 679 channels->max = dai->dai_config->ssp.tdm_slots; 680 681 dev_dbg(sdev->dev, 682 "rate_min: %d rate_max: %d\n", rate->min, rate->max); 683 dev_dbg(sdev->dev, 684 "channels_min: %d channels_max: %d\n", 685 channels->min, channels->max); 686 687 break; 688 case SOF_DAI_INTEL_DMIC: 689 /* DMIC only supports 16 or 32 bit formats */ 690 if (dai->comp_dai.config.frame_fmt == SOF_IPC_FRAME_S24_4LE) { 691 dev_err(sdev->dev, 692 "error: invalid fmt %d for DAI type %d\n", 693 dai->comp_dai.config.frame_fmt, 694 dai->dai_config->type); 695 } 696 break; 697 case SOF_DAI_INTEL_HDA: 698 /* do nothing for HDA dai_link */ 699 break; 700 case SOF_DAI_INTEL_ALH: 701 /* do nothing for ALH dai_link */ 702 break; 703 case SOF_DAI_IMX_ESAI: 704 channels->min = dai->dai_config->esai.tdm_slots; 705 channels->max = dai->dai_config->esai.tdm_slots; 706 707 dev_dbg(sdev->dev, 708 "channels_min: %d channels_max: %d\n", 709 channels->min, channels->max); 710 break; 711 default: 712 dev_err(sdev->dev, "error: invalid DAI type %d\n", 713 dai->dai_config->type); 714 break; 715 } 716 717 return 0; 718 } 719 720 static int sof_pcm_probe(struct snd_soc_component *component) 721 { 722 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 723 struct snd_sof_pdata *plat_data = sdev->pdata; 724 const char *tplg_filename; 725 int ret; 726 727 /* load the default topology */ 728 sdev->component = component; 729 730 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL, 731 "%s/%s", 732 plat_data->tplg_filename_prefix, 733 plat_data->tplg_filename); 734 if (!tplg_filename) 735 return -ENOMEM; 736 737 ret = snd_sof_load_topology(sdev, tplg_filename); 738 if (ret < 0) { 739 dev_err(sdev->dev, "error: failed to load DSP topology %d\n", 740 ret); 741 return ret; 742 } 743 744 /* 745 * Some platforms in SOF, ex: BYT, may not have their platform PM 746 * callbacks set. Increment the usage count so as to 747 * prevent the device from entering runtime suspend. 748 */ 749 if (!sof_ops(sdev)->runtime_suspend || !sof_ops(sdev)->runtime_resume) 750 pm_runtime_get_noresume(sdev->dev); 751 752 return ret; 753 } 754 755 static void sof_pcm_remove(struct snd_soc_component *component) 756 { 757 /* remove topology */ 758 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL); 759 } 760 761 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev) 762 { 763 struct snd_soc_component_driver *pd = &sdev->plat_drv; 764 struct snd_sof_pdata *plat_data = sdev->pdata; 765 const char *drv_name; 766 767 drv_name = plat_data->machine->drv_name; 768 769 pd->name = "sof-audio-component"; 770 pd->probe = sof_pcm_probe; 771 pd->remove = sof_pcm_remove; 772 pd->open = sof_pcm_open; 773 pd->close = sof_pcm_close; 774 pd->ioctl = snd_soc_pcm_lib_ioctl; 775 pd->hw_params = sof_pcm_hw_params; 776 pd->prepare = sof_pcm_prepare; 777 pd->hw_free = sof_pcm_hw_free; 778 pd->trigger = sof_pcm_trigger; 779 pd->pointer = sof_pcm_pointer; 780 781 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS) 782 pd->compr_ops = &sof_compressed_ops; 783 #endif 784 pd->pcm_construct = sof_pcm_new; 785 pd->ignore_machine = drv_name; 786 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup; 787 pd->be_pcm_base = SOF_BE_PCM_BASE; 788 pd->use_dai_pcm_id = true; 789 pd->topology_name_prefix = "sof"; 790 791 /* increment module refcount when a pcm is opened */ 792 pd->module_get_upon_open = 1; 793 } 794