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, err = 0; 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 dev_dbg(sdev->dev, "pcm: free stream %d dir %d\n", spcm->pcm.pcm_id, 258 substream->stream); 259 260 if (spcm->prepared[substream->stream]) { 261 ret = sof_pcm_dsp_pcm_free(substream, sdev, spcm); 262 if (ret < 0) 263 err = ret; 264 } 265 266 snd_pcm_lib_free_pages(substream); 267 268 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work); 269 270 ret = snd_sof_pcm_platform_hw_free(sdev, substream); 271 if (ret < 0) { 272 dev_err(sdev->dev, "error: platform hw free failed\n"); 273 err = ret; 274 } 275 276 return err; 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 bool ipc_first = false; 327 int ret; 328 329 /* nothing to do for BE */ 330 if (rtd->dai_link->no_pcm) 331 return 0; 332 333 spcm = snd_sof_find_spcm_dai(sdev, rtd); 334 if (!spcm) 335 return -EINVAL; 336 337 dev_dbg(sdev->dev, "pcm: trigger stream %d dir %d cmd %d\n", 338 spcm->pcm.pcm_id, substream->stream, cmd); 339 340 stream.hdr.size = sizeof(stream); 341 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG; 342 stream.comp_id = spcm->stream[substream->stream].comp_id; 343 344 switch (cmd) { 345 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 346 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE; 347 ipc_first = true; 348 break; 349 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 350 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE; 351 break; 352 case SNDRV_PCM_TRIGGER_RESUME: 353 /* set up hw_params */ 354 ret = sof_pcm_prepare(substream); 355 if (ret < 0) { 356 dev_err(sdev->dev, 357 "error: failed to set up hw_params upon resume\n"); 358 return ret; 359 } 360 361 /* fallthrough */ 362 case SNDRV_PCM_TRIGGER_START: 363 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START; 364 break; 365 case SNDRV_PCM_TRIGGER_SUSPEND: 366 case SNDRV_PCM_TRIGGER_STOP: 367 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP; 368 ipc_first = true; 369 reset_hw_params = true; 370 break; 371 default: 372 dev_err(sdev->dev, "error: unhandled trigger cmd %d\n", cmd); 373 return -EINVAL; 374 } 375 376 /* 377 * DMA and IPC sequence is different for start and stop. Need to send 378 * STOP IPC before stop DMA 379 */ 380 if (!ipc_first) 381 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 382 383 /* send IPC to the DSP */ 384 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream, 385 sizeof(stream), &reply, sizeof(reply)); 386 387 /* need to STOP DMA even if STOP IPC failed */ 388 if (ipc_first) 389 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 390 391 /* free PCM if reset_hw_params is set and the STOP IPC is successful */ 392 if (!ret && reset_hw_params) 393 ret = sof_pcm_dsp_pcm_free(substream, sdev, spcm); 394 395 return ret; 396 } 397 398 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_pcm_substream *substream) 399 { 400 struct snd_soc_pcm_runtime *rtd = substream->private_data; 401 struct snd_soc_component *component = 402 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 403 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 404 struct snd_sof_pcm *spcm; 405 snd_pcm_uframes_t host, dai; 406 407 /* nothing to do for BE */ 408 if (rtd->dai_link->no_pcm) 409 return 0; 410 411 /* use dsp ops pointer callback directly if set */ 412 if (sof_ops(sdev)->pcm_pointer) 413 return sof_ops(sdev)->pcm_pointer(sdev, substream); 414 415 spcm = snd_sof_find_spcm_dai(sdev, rtd); 416 if (!spcm) 417 return -EINVAL; 418 419 /* read position from DSP */ 420 host = bytes_to_frames(substream->runtime, 421 spcm->stream[substream->stream].posn.host_posn); 422 dai = bytes_to_frames(substream->runtime, 423 spcm->stream[substream->stream].posn.dai_posn); 424 425 dev_dbg(sdev->dev, "PCM: stream %d dir %d DMA position %lu DAI position %lu\n", 426 spcm->pcm.pcm_id, substream->stream, host, dai); 427 428 return host; 429 } 430 431 static int sof_pcm_open(struct snd_pcm_substream *substream) 432 { 433 struct snd_soc_pcm_runtime *rtd = substream->private_data; 434 struct snd_pcm_runtime *runtime = substream->runtime; 435 struct snd_soc_component *component = 436 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 437 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 438 struct snd_sof_pcm *spcm; 439 struct snd_soc_tplg_stream_caps *caps; 440 int ret; 441 442 /* nothing to do for BE */ 443 if (rtd->dai_link->no_pcm) 444 return 0; 445 446 spcm = snd_sof_find_spcm_dai(sdev, rtd); 447 if (!spcm) 448 return -EINVAL; 449 450 dev_dbg(sdev->dev, "pcm: open stream %d dir %d\n", spcm->pcm.pcm_id, 451 substream->stream); 452 453 INIT_WORK(&spcm->stream[substream->stream].period_elapsed_work, 454 sof_pcm_period_elapsed_work); 455 456 caps = &spcm->pcm.caps[substream->stream]; 457 458 /* set any runtime constraints based on topology */ 459 snd_pcm_hw_constraint_step(substream->runtime, 0, 460 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 461 le32_to_cpu(caps->period_size_min)); 462 snd_pcm_hw_constraint_step(substream->runtime, 0, 463 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 464 le32_to_cpu(caps->period_size_min)); 465 466 /* set runtime config */ 467 runtime->hw.info = SNDRV_PCM_INFO_MMAP | 468 SNDRV_PCM_INFO_MMAP_VALID | 469 SNDRV_PCM_INFO_INTERLEAVED | 470 SNDRV_PCM_INFO_PAUSE | 471 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP; 472 runtime->hw.formats = le64_to_cpu(caps->formats); 473 runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min); 474 runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max); 475 runtime->hw.periods_min = le32_to_cpu(caps->periods_min); 476 runtime->hw.periods_max = le32_to_cpu(caps->periods_max); 477 478 /* 479 * caps->buffer_size_min is not used since the 480 * snd_pcm_hardware structure only defines buffer_bytes_max 481 */ 482 runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max); 483 484 dev_dbg(sdev->dev, "period min %zd max %zd bytes\n", 485 runtime->hw.period_bytes_min, 486 runtime->hw.period_bytes_max); 487 dev_dbg(sdev->dev, "period count %d max %d\n", 488 runtime->hw.periods_min, 489 runtime->hw.periods_max); 490 dev_dbg(sdev->dev, "buffer max %zd bytes\n", 491 runtime->hw.buffer_bytes_max); 492 493 /* set wait time - TODO: come from topology */ 494 substream->wait_time = 500; 495 496 spcm->stream[substream->stream].posn.host_posn = 0; 497 spcm->stream[substream->stream].posn.dai_posn = 0; 498 spcm->stream[substream->stream].substream = substream; 499 spcm->prepared[substream->stream] = false; 500 501 ret = snd_sof_pcm_platform_open(sdev, substream); 502 if (ret < 0) 503 dev_err(sdev->dev, "error: pcm open failed %d\n", ret); 504 505 return ret; 506 } 507 508 static int sof_pcm_close(struct snd_pcm_substream *substream) 509 { 510 struct snd_soc_pcm_runtime *rtd = substream->private_data; 511 struct snd_soc_component *component = 512 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 513 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 514 struct snd_sof_pcm *spcm; 515 int err; 516 517 /* nothing to do for BE */ 518 if (rtd->dai_link->no_pcm) 519 return 0; 520 521 spcm = snd_sof_find_spcm_dai(sdev, rtd); 522 if (!spcm) 523 return -EINVAL; 524 525 dev_dbg(sdev->dev, "pcm: close stream %d dir %d\n", spcm->pcm.pcm_id, 526 substream->stream); 527 528 err = snd_sof_pcm_platform_close(sdev, substream); 529 if (err < 0) { 530 dev_err(sdev->dev, "error: pcm close failed %d\n", 531 err); 532 /* 533 * keep going, no point in preventing the close 534 * from happening 535 */ 536 } 537 538 return 0; 539 } 540 541 static struct snd_pcm_ops sof_pcm_ops = { 542 .open = sof_pcm_open, 543 .close = sof_pcm_close, 544 .ioctl = snd_pcm_lib_ioctl, 545 .hw_params = sof_pcm_hw_params, 546 .prepare = sof_pcm_prepare, 547 .hw_free = sof_pcm_hw_free, 548 .trigger = sof_pcm_trigger, 549 .pointer = sof_pcm_pointer, 550 .page = snd_pcm_sgbuf_ops_page, 551 }; 552 553 /* 554 * Pre-allocate playback/capture audio buffer pages. 555 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free 556 * snd_pcm_lib_preallocate_free_for_all() is called by the core. 557 */ 558 static int sof_pcm_new(struct snd_soc_pcm_runtime *rtd) 559 { 560 struct snd_soc_component *component = 561 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 562 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 563 struct snd_sof_pcm *spcm; 564 struct snd_pcm *pcm = rtd->pcm; 565 struct snd_soc_tplg_stream_caps *caps; 566 int stream = SNDRV_PCM_STREAM_PLAYBACK; 567 568 /* find SOF PCM for this RTD */ 569 spcm = snd_sof_find_spcm_dai(sdev, rtd); 570 if (!spcm) { 571 dev_warn(sdev->dev, "warn: can't find PCM with DAI ID %d\n", 572 rtd->dai_link->id); 573 return 0; 574 } 575 576 dev_dbg(sdev->dev, "creating new PCM %s\n", spcm->pcm.pcm_name); 577 578 /* do we need to pre-allocate playback audio buffer pages */ 579 if (!spcm->pcm.playback) 580 goto capture; 581 582 caps = &spcm->pcm.caps[stream]; 583 584 /* pre-allocate playback audio buffer pages */ 585 dev_dbg(sdev->dev, "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n", 586 caps->name, caps->buffer_size_min, caps->buffer_size_max); 587 588 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 589 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 590 le32_to_cpu(caps->buffer_size_min), 591 le32_to_cpu(caps->buffer_size_max)); 592 capture: 593 stream = SNDRV_PCM_STREAM_CAPTURE; 594 595 /* do we need to pre-allocate capture audio buffer pages */ 596 if (!spcm->pcm.capture) 597 return 0; 598 599 caps = &spcm->pcm.caps[stream]; 600 601 /* pre-allocate capture audio buffer pages */ 602 dev_dbg(sdev->dev, "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n", 603 caps->name, caps->buffer_size_min, caps->buffer_size_max); 604 605 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 606 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 607 le32_to_cpu(caps->buffer_size_min), 608 le32_to_cpu(caps->buffer_size_max)); 609 610 return 0; 611 } 612 613 /* fixup the BE DAI link to match any values from topology */ 614 static int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, 615 struct snd_pcm_hw_params *params) 616 { 617 struct snd_interval *rate = hw_param_interval(params, 618 SNDRV_PCM_HW_PARAM_RATE); 619 struct snd_interval *channels = hw_param_interval(params, 620 SNDRV_PCM_HW_PARAM_CHANNELS); 621 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 622 struct snd_soc_component *component = 623 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 624 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 625 struct snd_sof_dai *dai = 626 snd_sof_find_dai(sdev, (char *)rtd->dai_link->name); 627 628 /* no topology exists for this BE, try a common configuration */ 629 if (!dai) { 630 dev_warn(sdev->dev, "warning: no topology found for BE DAI %s config\n", 631 rtd->dai_link->name); 632 633 /* set 48k, stereo, 16bits by default */ 634 rate->min = 48000; 635 rate->max = 48000; 636 637 channels->min = 2; 638 channels->max = 2; 639 640 snd_mask_none(fmt); 641 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 642 643 return 0; 644 } 645 646 /* read format from topology */ 647 snd_mask_none(fmt); 648 649 switch (dai->comp_dai.config.frame_fmt) { 650 case SOF_IPC_FRAME_S16_LE: 651 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 652 break; 653 case SOF_IPC_FRAME_S24_4LE: 654 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE); 655 break; 656 case SOF_IPC_FRAME_S32_LE: 657 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S32_LE); 658 break; 659 default: 660 dev_err(sdev->dev, "error: No available DAI format!\n"); 661 return -EINVAL; 662 } 663 664 /* read rate and channels from topology */ 665 switch (dai->dai_config->type) { 666 case SOF_DAI_INTEL_SSP: 667 rate->min = dai->dai_config->ssp.fsync_rate; 668 rate->max = dai->dai_config->ssp.fsync_rate; 669 channels->min = dai->dai_config->ssp.tdm_slots; 670 channels->max = dai->dai_config->ssp.tdm_slots; 671 672 dev_dbg(sdev->dev, 673 "rate_min: %d rate_max: %d\n", rate->min, rate->max); 674 dev_dbg(sdev->dev, 675 "channels_min: %d channels_max: %d\n", 676 channels->min, channels->max); 677 678 break; 679 case SOF_DAI_INTEL_DMIC: 680 /* DMIC only supports 16 or 32 bit formats */ 681 if (dai->comp_dai.config.frame_fmt == SOF_IPC_FRAME_S24_4LE) { 682 dev_err(sdev->dev, 683 "error: invalid fmt %d for DAI type %d\n", 684 dai->comp_dai.config.frame_fmt, 685 dai->dai_config->type); 686 } 687 break; 688 case SOF_DAI_INTEL_HDA: 689 /* do nothing for HDA dai_link */ 690 break; 691 case SOF_DAI_INTEL_ALH: 692 /* do nothing for ALH dai_link */ 693 break; 694 default: 695 dev_err(sdev->dev, "error: invalid DAI type %d\n", 696 dai->dai_config->type); 697 break; 698 } 699 700 return 0; 701 } 702 703 static int sof_pcm_probe(struct snd_soc_component *component) 704 { 705 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 706 struct snd_sof_pdata *plat_data = sdev->pdata; 707 const char *tplg_filename; 708 int ret; 709 710 /* load the default topology */ 711 sdev->component = component; 712 713 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL, 714 "%s/%s", 715 plat_data->tplg_filename_prefix, 716 plat_data->tplg_filename); 717 if (!tplg_filename) 718 return -ENOMEM; 719 720 ret = snd_sof_load_topology(sdev, tplg_filename); 721 if (ret < 0) { 722 dev_err(sdev->dev, "error: failed to load DSP topology %d\n", 723 ret); 724 return ret; 725 } 726 727 /* 728 * Some platforms in SOF, ex: BYT, may not have their platform PM 729 * callbacks set. Increment the usage count so as to 730 * prevent the device from entering runtime suspend. 731 */ 732 if (!sof_ops(sdev)->runtime_suspend || !sof_ops(sdev)->runtime_resume) 733 pm_runtime_get_noresume(sdev->dev); 734 735 return ret; 736 } 737 738 static void sof_pcm_remove(struct snd_soc_component *component) 739 { 740 /* remove topology */ 741 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL); 742 } 743 744 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev) 745 { 746 struct snd_soc_component_driver *pd = &sdev->plat_drv; 747 struct snd_sof_pdata *plat_data = sdev->pdata; 748 const char *drv_name; 749 750 drv_name = plat_data->machine->drv_name; 751 752 pd->name = "sof-audio-component"; 753 pd->probe = sof_pcm_probe; 754 pd->remove = sof_pcm_remove; 755 pd->ops = &sof_pcm_ops; 756 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS) 757 pd->compr_ops = &sof_compressed_ops; 758 #endif 759 pd->pcm_new = sof_pcm_new; 760 pd->ignore_machine = drv_name; 761 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup; 762 pd->be_pcm_base = SOF_BE_PCM_BASE; 763 pd->use_dai_pcm_id = true; 764 pd->topology_name_prefix = "sof"; 765 766 /* increment module refcount when a pcm is opened */ 767 pd->module_get_upon_open = 1; 768 } 769