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_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_soc_component *component = 27 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 28 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 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(sdev, rtd); 34 if (!spcm) 35 return -EINVAL; 36 37 return snd_sof_create_page_table(sdev, dmab, 38 spcm->stream[stream].page_table.area, size); 39 } 40 41 static int sof_pcm_dsp_params(struct snd_sof_pcm *spcm, struct snd_pcm_substream *substream, 42 const struct sof_ipc_pcm_params_reply *reply) 43 { 44 struct snd_sof_dev *sdev = spcm->sdev; 45 /* validate offset */ 46 int ret = snd_sof_ipc_pcm_params(sdev, substream, reply); 47 48 if (ret < 0) 49 dev_err(sdev->dev, "error: got wrong reply for PCM %d\n", 50 spcm->pcm.pcm_id); 51 52 return ret; 53 } 54 55 /* 56 * sof pcm period elapse work 57 */ 58 static void sof_pcm_period_elapsed_work(struct work_struct *work) 59 { 60 struct snd_sof_pcm_stream *sps = 61 container_of(work, struct snd_sof_pcm_stream, 62 period_elapsed_work); 63 64 snd_pcm_period_elapsed(sps->substream); 65 } 66 67 /* 68 * sof pcm period elapse, this could be called at irq thread context. 69 */ 70 void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream) 71 { 72 struct snd_soc_pcm_runtime *rtd = substream->private_data; 73 struct snd_soc_component *component = 74 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 75 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 76 struct snd_sof_pcm *spcm; 77 78 spcm = snd_sof_find_spcm_dai(sdev, rtd); 79 if (!spcm) { 80 dev_err(sdev->dev, 81 "error: period elapsed for unknown stream!\n"); 82 return; 83 } 84 85 /* 86 * snd_pcm_period_elapsed() can be called in interrupt context 87 * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(), 88 * when the PCM is done draining or xrun happened, a STOP IPC will 89 * then be sent and this IPC will hit IPC timeout. 90 * To avoid sending IPC before the previous IPC is handled, we 91 * schedule delayed work here to call the snd_pcm_period_elapsed(). 92 */ 93 schedule_work(&spcm->stream[substream->stream].period_elapsed_work); 94 } 95 EXPORT_SYMBOL(snd_sof_pcm_period_elapsed); 96 97 /* this may get called several times by oss emulation */ 98 static int sof_pcm_hw_params(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_soc_component *component = 104 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 105 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 106 struct snd_sof_pcm *spcm; 107 struct sof_ipc_pcm_params pcm; 108 struct sof_ipc_pcm_params_reply ipc_params_reply; 109 int ret; 110 111 /* nothing to do for BE */ 112 if (rtd->dai_link->no_pcm) 113 return 0; 114 115 spcm = snd_sof_find_spcm_dai(sdev, rtd); 116 if (!spcm) 117 return -EINVAL; 118 119 dev_dbg(sdev->dev, "pcm: hw params stream %d dir %d\n", 120 spcm->pcm.pcm_id, substream->stream); 121 122 memset(&pcm, 0, sizeof(pcm)); 123 124 /* allocate audio buffer pages */ 125 ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); 126 if (ret < 0) { 127 dev_err(sdev->dev, "error: could not allocate %d bytes for PCM %d\n", 128 params_buffer_bytes(params), spcm->pcm.pcm_id); 129 return ret; 130 } 131 if (ret) { 132 /* 133 * ret == 1 means the buffer is changed 134 * create compressed page table for audio firmware 135 * ret == 0 means the buffer is not changed 136 * so no need to regenerate the page table 137 */ 138 ret = create_page_table(substream, runtime->dma_area, 139 runtime->dma_bytes); 140 if (ret < 0) 141 return ret; 142 } 143 144 /* number of pages should be rounded up */ 145 pcm.params.buffer.pages = PFN_UP(runtime->dma_bytes); 146 147 /* set IPC PCM parameters */ 148 pcm.hdr.size = sizeof(pcm); 149 pcm.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS; 150 pcm.comp_id = spcm->stream[substream->stream].comp_id; 151 pcm.params.hdr.size = sizeof(pcm.params); 152 pcm.params.buffer.phy_addr = 153 spcm->stream[substream->stream].page_table.addr; 154 pcm.params.buffer.size = runtime->dma_bytes; 155 pcm.params.direction = substream->stream; 156 pcm.params.sample_valid_bytes = params_width(params) >> 3; 157 pcm.params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED; 158 pcm.params.rate = params_rate(params); 159 pcm.params.channels = params_channels(params); 160 pcm.params.host_period_bytes = params_period_bytes(params); 161 162 /* container size */ 163 ret = snd_pcm_format_physical_width(params_format(params)); 164 if (ret < 0) 165 return ret; 166 pcm.params.sample_container_bytes = ret >> 3; 167 168 /* format */ 169 switch (params_format(params)) { 170 case SNDRV_PCM_FORMAT_S16: 171 pcm.params.frame_fmt = SOF_IPC_FRAME_S16_LE; 172 break; 173 case SNDRV_PCM_FORMAT_S24: 174 pcm.params.frame_fmt = SOF_IPC_FRAME_S24_4LE; 175 break; 176 case SNDRV_PCM_FORMAT_S32: 177 pcm.params.frame_fmt = SOF_IPC_FRAME_S32_LE; 178 break; 179 case SNDRV_PCM_FORMAT_FLOAT: 180 pcm.params.frame_fmt = SOF_IPC_FRAME_FLOAT; 181 break; 182 default: 183 return -EINVAL; 184 } 185 186 /* firmware already configured host stream */ 187 ret = snd_sof_pcm_platform_hw_params(sdev, 188 substream, 189 params, 190 &pcm.params); 191 if (ret < 0) { 192 dev_err(sdev->dev, "error: platform hw params failed\n"); 193 return ret; 194 } 195 196 dev_dbg(sdev->dev, "stream_tag %d", pcm.params.stream_tag); 197 198 /* send IPC to the DSP */ 199 ret = sof_ipc_tx_message(sdev->ipc, pcm.hdr.cmd, &pcm, sizeof(pcm), 200 &ipc_params_reply, sizeof(ipc_params_reply)); 201 if (ret < 0) { 202 dev_err(sdev->dev, "error: hw params ipc failed for stream %d\n", 203 pcm.params.stream_tag); 204 return ret; 205 } 206 207 ret = sof_pcm_dsp_params(spcm, substream, &ipc_params_reply); 208 if (ret < 0) 209 return ret; 210 211 spcm->prepared[substream->stream] = true; 212 213 /* save pcm hw_params */ 214 memcpy(&spcm->params[substream->stream], params, sizeof(*params)); 215 216 return ret; 217 } 218 219 static int sof_pcm_dsp_pcm_free(struct snd_pcm_substream *substream, 220 struct snd_sof_dev *sdev, 221 struct snd_sof_pcm *spcm) 222 { 223 struct sof_ipc_stream stream; 224 struct sof_ipc_reply reply; 225 int ret; 226 227 stream.hdr.size = sizeof(stream); 228 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE; 229 stream.comp_id = spcm->stream[substream->stream].comp_id; 230 231 /* send IPC to the DSP */ 232 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream, 233 sizeof(stream), &reply, sizeof(reply)); 234 if (!ret) 235 spcm->prepared[substream->stream] = false; 236 237 return ret; 238 } 239 240 static int sof_pcm_hw_free(struct snd_pcm_substream *substream) 241 { 242 struct snd_soc_pcm_runtime *rtd = substream->private_data; 243 struct snd_soc_component *component = 244 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 245 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 246 struct snd_sof_pcm *spcm; 247 int ret; 248 249 /* nothing to do for BE */ 250 if (rtd->dai_link->no_pcm) 251 return 0; 252 253 spcm = snd_sof_find_spcm_dai(sdev, rtd); 254 if (!spcm) 255 return -EINVAL; 256 257 if (!spcm->prepared[substream->stream]) 258 return 0; 259 260 dev_dbg(sdev->dev, "pcm: free stream %d dir %d\n", spcm->pcm.pcm_id, 261 substream->stream); 262 263 ret = sof_pcm_dsp_pcm_free(substream, sdev, spcm); 264 265 snd_pcm_lib_free_pages(substream); 266 267 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work); 268 269 if (ret < 0) 270 return ret; 271 272 ret = snd_sof_pcm_platform_hw_free(sdev, substream); 273 if (ret < 0) 274 dev_err(sdev->dev, "error: platform hw free failed\n"); 275 276 return ret; 277 } 278 279 static int sof_pcm_prepare(struct snd_pcm_substream *substream) 280 { 281 struct snd_soc_pcm_runtime *rtd = substream->private_data; 282 struct snd_soc_component *component = 283 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 284 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 285 struct snd_sof_pcm *spcm; 286 int ret; 287 288 /* nothing to do for BE */ 289 if (rtd->dai_link->no_pcm) 290 return 0; 291 292 spcm = snd_sof_find_spcm_dai(sdev, rtd); 293 if (!spcm) 294 return -EINVAL; 295 296 if (spcm->prepared[substream->stream]) 297 return 0; 298 299 dev_dbg(sdev->dev, "pcm: prepare stream %d dir %d\n", spcm->pcm.pcm_id, 300 substream->stream); 301 302 /* set hw_params */ 303 ret = sof_pcm_hw_params(substream, &spcm->params[substream->stream]); 304 if (ret < 0) { 305 dev_err(sdev->dev, "error: set pcm hw_params after resume\n"); 306 return ret; 307 } 308 309 return 0; 310 } 311 312 /* 313 * FE dai link trigger actions are always executed in non-atomic context because 314 * they involve IPC's. 315 */ 316 static int sof_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 317 { 318 struct snd_soc_pcm_runtime *rtd = substream->private_data; 319 struct snd_soc_component *component = 320 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 321 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 322 struct snd_sof_pcm *spcm; 323 struct sof_ipc_stream stream; 324 struct sof_ipc_reply reply; 325 bool reset_hw_params = false; 326 int ret; 327 328 /* nothing to do for BE */ 329 if (rtd->dai_link->no_pcm) 330 return 0; 331 332 spcm = snd_sof_find_spcm_dai(sdev, rtd); 333 if (!spcm) 334 return -EINVAL; 335 336 dev_dbg(sdev->dev, "pcm: trigger stream %d dir %d cmd %d\n", 337 spcm->pcm.pcm_id, substream->stream, cmd); 338 339 stream.hdr.size = sizeof(stream); 340 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG; 341 stream.comp_id = spcm->stream[substream->stream].comp_id; 342 343 switch (cmd) { 344 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 345 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE; 346 break; 347 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 348 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE; 349 break; 350 case SNDRV_PCM_TRIGGER_RESUME: 351 /* set up hw_params */ 352 ret = sof_pcm_prepare(substream); 353 if (ret < 0) { 354 dev_err(sdev->dev, 355 "error: failed to set up hw_params upon resume\n"); 356 return ret; 357 } 358 359 /* fallthrough */ 360 case SNDRV_PCM_TRIGGER_START: 361 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START; 362 break; 363 case SNDRV_PCM_TRIGGER_SUSPEND: 364 case SNDRV_PCM_TRIGGER_STOP: 365 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP; 366 reset_hw_params = true; 367 break; 368 default: 369 dev_err(sdev->dev, "error: unhandled trigger cmd %d\n", cmd); 370 return -EINVAL; 371 } 372 373 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 374 375 /* send IPC to the DSP */ 376 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream, 377 sizeof(stream), &reply, sizeof(reply)); 378 379 if (!ret && reset_hw_params) 380 ret = sof_pcm_dsp_pcm_free(substream, sdev, spcm); 381 382 return ret; 383 } 384 385 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_pcm_substream *substream) 386 { 387 struct snd_soc_pcm_runtime *rtd = substream->private_data; 388 struct snd_soc_component *component = 389 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 390 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 391 struct snd_sof_pcm *spcm; 392 snd_pcm_uframes_t host, dai; 393 394 /* nothing to do for BE */ 395 if (rtd->dai_link->no_pcm) 396 return 0; 397 398 /* use dsp ops pointer callback directly if set */ 399 if (sof_ops(sdev)->pcm_pointer) 400 return sof_ops(sdev)->pcm_pointer(sdev, substream); 401 402 spcm = snd_sof_find_spcm_dai(sdev, rtd); 403 if (!spcm) 404 return -EINVAL; 405 406 /* read position from DSP */ 407 host = bytes_to_frames(substream->runtime, 408 spcm->stream[substream->stream].posn.host_posn); 409 dai = bytes_to_frames(substream->runtime, 410 spcm->stream[substream->stream].posn.dai_posn); 411 412 dev_dbg(sdev->dev, "PCM: stream %d dir %d DMA position %lu DAI position %lu\n", 413 spcm->pcm.pcm_id, substream->stream, host, dai); 414 415 return host; 416 } 417 418 static int sof_pcm_open(struct snd_pcm_substream *substream) 419 { 420 struct snd_soc_pcm_runtime *rtd = substream->private_data; 421 struct snd_pcm_runtime *runtime = substream->runtime; 422 struct snd_soc_component *component = 423 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 424 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 425 struct snd_sof_pcm *spcm; 426 struct snd_soc_tplg_stream_caps *caps; 427 int ret; 428 429 /* nothing to do for BE */ 430 if (rtd->dai_link->no_pcm) 431 return 0; 432 433 spcm = snd_sof_find_spcm_dai(sdev, rtd); 434 if (!spcm) 435 return -EINVAL; 436 437 dev_dbg(sdev->dev, "pcm: open stream %d dir %d\n", spcm->pcm.pcm_id, 438 substream->stream); 439 440 INIT_WORK(&spcm->stream[substream->stream].period_elapsed_work, 441 sof_pcm_period_elapsed_work); 442 443 caps = &spcm->pcm.caps[substream->stream]; 444 445 /* set any runtime constraints based on topology */ 446 snd_pcm_hw_constraint_step(substream->runtime, 0, 447 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 448 le32_to_cpu(caps->period_size_min)); 449 snd_pcm_hw_constraint_step(substream->runtime, 0, 450 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 451 le32_to_cpu(caps->period_size_min)); 452 453 /* set runtime config */ 454 runtime->hw.info = SNDRV_PCM_INFO_MMAP | 455 SNDRV_PCM_INFO_MMAP_VALID | 456 SNDRV_PCM_INFO_INTERLEAVED | 457 SNDRV_PCM_INFO_PAUSE | 458 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP; 459 runtime->hw.formats = le64_to_cpu(caps->formats); 460 runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min); 461 runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max); 462 runtime->hw.periods_min = le32_to_cpu(caps->periods_min); 463 runtime->hw.periods_max = le32_to_cpu(caps->periods_max); 464 465 /* 466 * caps->buffer_size_min is not used since the 467 * snd_pcm_hardware structure only defines buffer_bytes_max 468 */ 469 runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max); 470 471 dev_dbg(sdev->dev, "period min %zd max %zd bytes\n", 472 runtime->hw.period_bytes_min, 473 runtime->hw.period_bytes_max); 474 dev_dbg(sdev->dev, "period count %d max %d\n", 475 runtime->hw.periods_min, 476 runtime->hw.periods_max); 477 dev_dbg(sdev->dev, "buffer max %zd bytes\n", 478 runtime->hw.buffer_bytes_max); 479 480 /* set wait time - TODO: come from topology */ 481 substream->wait_time = 500; 482 483 spcm->stream[substream->stream].posn.host_posn = 0; 484 spcm->stream[substream->stream].posn.dai_posn = 0; 485 spcm->stream[substream->stream].substream = substream; 486 spcm->prepared[substream->stream] = false; 487 488 ret = snd_sof_pcm_platform_open(sdev, substream); 489 if (ret < 0) 490 dev_err(sdev->dev, "error: pcm open failed %d\n", ret); 491 492 return ret; 493 } 494 495 static int sof_pcm_close(struct snd_pcm_substream *substream) 496 { 497 struct snd_soc_pcm_runtime *rtd = substream->private_data; 498 struct snd_soc_component *component = 499 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 500 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 501 struct snd_sof_pcm *spcm; 502 int err; 503 504 /* nothing to do for BE */ 505 if (rtd->dai_link->no_pcm) 506 return 0; 507 508 spcm = snd_sof_find_spcm_dai(sdev, rtd); 509 if (!spcm) 510 return -EINVAL; 511 512 dev_dbg(sdev->dev, "pcm: close stream %d dir %d\n", spcm->pcm.pcm_id, 513 substream->stream); 514 515 err = snd_sof_pcm_platform_close(sdev, substream); 516 if (err < 0) { 517 dev_err(sdev->dev, "error: pcm close failed %d\n", 518 err); 519 /* 520 * keep going, no point in preventing the close 521 * from happening 522 */ 523 } 524 525 return 0; 526 } 527 528 static struct snd_pcm_ops sof_pcm_ops = { 529 .open = sof_pcm_open, 530 .close = sof_pcm_close, 531 .ioctl = snd_pcm_lib_ioctl, 532 .hw_params = sof_pcm_hw_params, 533 .prepare = sof_pcm_prepare, 534 .hw_free = sof_pcm_hw_free, 535 .trigger = sof_pcm_trigger, 536 .pointer = sof_pcm_pointer, 537 .page = snd_pcm_sgbuf_ops_page, 538 }; 539 540 /* 541 * Pre-allocate playback/capture audio buffer pages. 542 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free 543 * snd_pcm_lib_preallocate_free_for_all() is called by the core. 544 */ 545 static int sof_pcm_new(struct snd_soc_pcm_runtime *rtd) 546 { 547 struct snd_soc_component *component = 548 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 549 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 550 struct snd_sof_pcm *spcm; 551 struct snd_pcm *pcm = rtd->pcm; 552 struct snd_soc_tplg_stream_caps *caps; 553 int stream = SNDRV_PCM_STREAM_PLAYBACK; 554 555 /* find SOF PCM for this RTD */ 556 spcm = snd_sof_find_spcm_dai(sdev, rtd); 557 if (!spcm) { 558 dev_warn(sdev->dev, "warn: can't find PCM with DAI ID %d\n", 559 rtd->dai_link->id); 560 return 0; 561 } 562 563 dev_dbg(sdev->dev, "creating new PCM %s\n", spcm->pcm.pcm_name); 564 565 /* do we need to pre-allocate playback audio buffer pages */ 566 if (!spcm->pcm.playback) 567 goto capture; 568 569 caps = &spcm->pcm.caps[stream]; 570 571 /* pre-allocate playback audio buffer pages */ 572 dev_dbg(sdev->dev, "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n", 573 caps->name, caps->buffer_size_min, caps->buffer_size_max); 574 575 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 576 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 577 le32_to_cpu(caps->buffer_size_min), 578 le32_to_cpu(caps->buffer_size_max)); 579 capture: 580 stream = SNDRV_PCM_STREAM_CAPTURE; 581 582 /* do we need to pre-allocate capture audio buffer pages */ 583 if (!spcm->pcm.capture) 584 return 0; 585 586 caps = &spcm->pcm.caps[stream]; 587 588 /* pre-allocate capture audio buffer pages */ 589 dev_dbg(sdev->dev, "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n", 590 caps->name, caps->buffer_size_min, caps->buffer_size_max); 591 592 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 593 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 594 le32_to_cpu(caps->buffer_size_min), 595 le32_to_cpu(caps->buffer_size_max)); 596 597 return 0; 598 } 599 600 /* fixup the BE DAI link to match any values from topology */ 601 static int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, 602 struct snd_pcm_hw_params *params) 603 { 604 struct snd_interval *rate = hw_param_interval(params, 605 SNDRV_PCM_HW_PARAM_RATE); 606 struct snd_interval *channels = hw_param_interval(params, 607 SNDRV_PCM_HW_PARAM_CHANNELS); 608 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 609 struct snd_soc_component *component = 610 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 611 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 612 struct snd_sof_dai *dai = 613 snd_sof_find_dai(sdev, (char *)rtd->dai_link->name); 614 615 /* no topology exists for this BE, try a common configuration */ 616 if (!dai) { 617 dev_warn(sdev->dev, "warning: no topology found for BE DAI %s config\n", 618 rtd->dai_link->name); 619 620 /* set 48k, stereo, 16bits by default */ 621 rate->min = 48000; 622 rate->max = 48000; 623 624 channels->min = 2; 625 channels->max = 2; 626 627 snd_mask_none(fmt); 628 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 629 630 return 0; 631 } 632 633 /* read format from topology */ 634 snd_mask_none(fmt); 635 636 switch (dai->comp_dai.config.frame_fmt) { 637 case SOF_IPC_FRAME_S16_LE: 638 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 639 break; 640 case SOF_IPC_FRAME_S24_4LE: 641 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE); 642 break; 643 case SOF_IPC_FRAME_S32_LE: 644 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S32_LE); 645 break; 646 default: 647 dev_err(sdev->dev, "error: No available DAI format!\n"); 648 return -EINVAL; 649 } 650 651 /* read rate and channels from topology */ 652 switch (dai->dai_config->type) { 653 case SOF_DAI_INTEL_SSP: 654 rate->min = dai->dai_config->ssp.fsync_rate; 655 rate->max = dai->dai_config->ssp.fsync_rate; 656 channels->min = dai->dai_config->ssp.tdm_slots; 657 channels->max = dai->dai_config->ssp.tdm_slots; 658 659 dev_dbg(sdev->dev, 660 "rate_min: %d rate_max: %d\n", rate->min, rate->max); 661 dev_dbg(sdev->dev, 662 "channels_min: %d channels_max: %d\n", 663 channels->min, channels->max); 664 665 break; 666 case SOF_DAI_INTEL_DMIC: 667 /* DMIC only supports 16 or 32 bit formats */ 668 if (dai->comp_dai.config.frame_fmt == SOF_IPC_FRAME_S24_4LE) { 669 dev_err(sdev->dev, 670 "error: invalid fmt %d for DAI type %d\n", 671 dai->comp_dai.config.frame_fmt, 672 dai->dai_config->type); 673 } 674 break; 675 case SOF_DAI_INTEL_HDA: 676 /* do nothing for HDA dai_link */ 677 break; 678 case SOF_DAI_INTEL_ALH: 679 /* do nothing for ALH dai_link */ 680 break; 681 default: 682 dev_err(sdev->dev, "error: invalid DAI type %d\n", 683 dai->dai_config->type); 684 break; 685 } 686 687 return 0; 688 } 689 690 static int sof_pcm_probe(struct snd_soc_component *component) 691 { 692 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 693 struct snd_sof_pdata *plat_data = sdev->pdata; 694 const char *tplg_filename; 695 int ret; 696 697 /* load the default topology */ 698 sdev->component = component; 699 700 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL, 701 "%s/%s", 702 plat_data->tplg_filename_prefix, 703 plat_data->tplg_filename); 704 if (!tplg_filename) 705 return -ENOMEM; 706 707 ret = snd_sof_load_topology(sdev, tplg_filename); 708 if (ret < 0) { 709 dev_err(sdev->dev, "error: failed to load DSP topology %d\n", 710 ret); 711 return ret; 712 } 713 714 /* 715 * Some platforms in SOF, ex: BYT, may not have their platform PM 716 * callbacks set. Increment the usage count so as to 717 * prevent the device from entering runtime suspend. 718 */ 719 if (!sof_ops(sdev)->runtime_suspend || !sof_ops(sdev)->runtime_resume) 720 pm_runtime_get_noresume(sdev->dev); 721 722 return ret; 723 } 724 725 static void sof_pcm_remove(struct snd_soc_component *component) 726 { 727 /* remove topology */ 728 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL); 729 } 730 731 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev) 732 { 733 struct snd_soc_component_driver *pd = &sdev->plat_drv; 734 struct snd_sof_pdata *plat_data = sdev->pdata; 735 const char *drv_name; 736 737 drv_name = plat_data->machine->drv_name; 738 739 pd->name = "sof-audio-component"; 740 pd->probe = sof_pcm_probe; 741 pd->remove = sof_pcm_remove; 742 pd->ops = &sof_pcm_ops; 743 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS) 744 pd->compr_ops = &sof_compressed_ops; 745 #endif 746 pd->pcm_new = sof_pcm_new; 747 pd->ignore_machine = drv_name; 748 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup; 749 pd->be_pcm_base = SOF_BE_PCM_BASE; 750 pd->use_dai_pcm_id = true; 751 pd->topology_name_prefix = "sof"; 752 753 /* increment module refcount when a pcm is opened */ 754 pd->module_get_upon_open = 1; 755 } 756