1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // soc-pcm.c -- ALSA SoC PCM 4 // 5 // Copyright 2005 Wolfson Microelectronics PLC. 6 // Copyright 2005 Openedhand Ltd. 7 // Copyright (C) 2010 Slimlogic Ltd. 8 // Copyright (C) 2010 Texas Instruments Inc. 9 // 10 // Authors: Liam Girdwood <lrg@ti.com> 11 // Mark Brown <broonie@opensource.wolfsonmicro.com> 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/pinctrl/consumer.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/module.h> 19 #include <linux/slab.h> 20 #include <linux/workqueue.h> 21 #include <linux/export.h> 22 #include <linux/debugfs.h> 23 #include <sound/core.h> 24 #include <sound/pcm.h> 25 #include <sound/pcm_params.h> 26 #include <sound/soc.h> 27 #include <sound/soc-dpcm.h> 28 #include <sound/initval.h> 29 30 #define DPCM_MAX_BE_USERS 8 31 32 /* 33 * snd_soc_dai_stream_valid() - check if a DAI supports the given stream 34 * 35 * Returns true if the DAI supports the indicated stream type. 36 */ 37 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream) 38 { 39 struct snd_soc_pcm_stream *codec_stream; 40 41 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 42 codec_stream = &dai->driver->playback; 43 else 44 codec_stream = &dai->driver->capture; 45 46 /* If the codec specifies any channels at all, it supports the stream */ 47 return codec_stream->channels_min; 48 } 49 50 /** 51 * snd_soc_runtime_activate() - Increment active count for PCM runtime components 52 * @rtd: ASoC PCM runtime that is activated 53 * @stream: Direction of the PCM stream 54 * 55 * Increments the active count for all the DAIs and components attached to a PCM 56 * runtime. Should typically be called when a stream is opened. 57 * 58 * Must be called with the rtd->pcm_mutex being held 59 */ 60 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream) 61 { 62 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 63 struct snd_soc_dai *codec_dai; 64 int i; 65 66 lockdep_assert_held(&rtd->pcm_mutex); 67 68 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 69 cpu_dai->playback_active++; 70 for_each_rtd_codec_dai(rtd, i, codec_dai) 71 codec_dai->playback_active++; 72 } else { 73 cpu_dai->capture_active++; 74 for_each_rtd_codec_dai(rtd, i, codec_dai) 75 codec_dai->capture_active++; 76 } 77 78 cpu_dai->active++; 79 cpu_dai->component->active++; 80 for_each_rtd_codec_dai(rtd, i, codec_dai) { 81 codec_dai->active++; 82 codec_dai->component->active++; 83 } 84 } 85 86 /** 87 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components 88 * @rtd: ASoC PCM runtime that is deactivated 89 * @stream: Direction of the PCM stream 90 * 91 * Decrements the active count for all the DAIs and components attached to a PCM 92 * runtime. Should typically be called when a stream is closed. 93 * 94 * Must be called with the rtd->pcm_mutex being held 95 */ 96 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream) 97 { 98 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 99 struct snd_soc_dai *codec_dai; 100 int i; 101 102 lockdep_assert_held(&rtd->pcm_mutex); 103 104 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 105 cpu_dai->playback_active--; 106 for_each_rtd_codec_dai(rtd, i, codec_dai) 107 codec_dai->playback_active--; 108 } else { 109 cpu_dai->capture_active--; 110 for_each_rtd_codec_dai(rtd, i, codec_dai) 111 codec_dai->capture_active--; 112 } 113 114 cpu_dai->active--; 115 cpu_dai->component->active--; 116 for_each_rtd_codec_dai(rtd, i, codec_dai) { 117 codec_dai->component->active--; 118 codec_dai->active--; 119 } 120 } 121 122 /** 123 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 124 * @rtd: The ASoC PCM runtime that should be checked. 125 * 126 * This function checks whether the power down delay should be ignored for a 127 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 128 * been configured to ignore the delay, or if none of the components benefits 129 * from having the delay. 130 */ 131 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 132 { 133 struct snd_soc_rtdcom_list *rtdcom; 134 struct snd_soc_component *component; 135 bool ignore = true; 136 137 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 138 return true; 139 140 for_each_rtdcom(rtd, rtdcom) { 141 component = rtdcom->component; 142 143 ignore &= !component->driver->use_pmdown_time; 144 } 145 146 return ignore; 147 } 148 149 /** 150 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 151 * @substream: the pcm substream 152 * @hw: the hardware parameters 153 * 154 * Sets the substream runtime hardware parameters. 155 */ 156 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 157 const struct snd_pcm_hardware *hw) 158 { 159 struct snd_pcm_runtime *runtime = substream->runtime; 160 runtime->hw.info = hw->info; 161 runtime->hw.formats = hw->formats; 162 runtime->hw.period_bytes_min = hw->period_bytes_min; 163 runtime->hw.period_bytes_max = hw->period_bytes_max; 164 runtime->hw.periods_min = hw->periods_min; 165 runtime->hw.periods_max = hw->periods_max; 166 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; 167 runtime->hw.fifo_size = hw->fifo_size; 168 return 0; 169 } 170 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 171 172 /* DPCM stream event, send event to FE and all active BEs. */ 173 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 174 int event) 175 { 176 struct snd_soc_dpcm *dpcm; 177 178 for_each_dpcm_be(fe, dir, dpcm) { 179 180 struct snd_soc_pcm_runtime *be = dpcm->be; 181 182 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 183 be->dai_link->name, event, dir); 184 185 if ((event == SND_SOC_DAPM_STREAM_STOP) && 186 (be->dpcm[dir].users >= 1)) 187 continue; 188 189 snd_soc_dapm_stream_event(be, dir, event); 190 } 191 192 snd_soc_dapm_stream_event(fe, dir, event); 193 194 return 0; 195 } 196 197 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 198 struct snd_soc_dai *soc_dai) 199 { 200 struct snd_soc_pcm_runtime *rtd = substream->private_data; 201 int ret; 202 203 if (soc_dai->rate && (soc_dai->driver->symmetric_rates || 204 rtd->dai_link->symmetric_rates)) { 205 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", 206 soc_dai->rate); 207 208 ret = snd_pcm_hw_constraint_single(substream->runtime, 209 SNDRV_PCM_HW_PARAM_RATE, 210 soc_dai->rate); 211 if (ret < 0) { 212 dev_err(soc_dai->dev, 213 "ASoC: Unable to apply rate constraint: %d\n", 214 ret); 215 return ret; 216 } 217 } 218 219 if (soc_dai->channels && (soc_dai->driver->symmetric_channels || 220 rtd->dai_link->symmetric_channels)) { 221 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n", 222 soc_dai->channels); 223 224 ret = snd_pcm_hw_constraint_single(substream->runtime, 225 SNDRV_PCM_HW_PARAM_CHANNELS, 226 soc_dai->channels); 227 if (ret < 0) { 228 dev_err(soc_dai->dev, 229 "ASoC: Unable to apply channel symmetry constraint: %d\n", 230 ret); 231 return ret; 232 } 233 } 234 235 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits || 236 rtd->dai_link->symmetric_samplebits)) { 237 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n", 238 soc_dai->sample_bits); 239 240 ret = snd_pcm_hw_constraint_single(substream->runtime, 241 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 242 soc_dai->sample_bits); 243 if (ret < 0) { 244 dev_err(soc_dai->dev, 245 "ASoC: Unable to apply sample bits symmetry constraint: %d\n", 246 ret); 247 return ret; 248 } 249 } 250 251 return 0; 252 } 253 254 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 255 struct snd_pcm_hw_params *params) 256 { 257 struct snd_soc_pcm_runtime *rtd = substream->private_data; 258 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 259 struct snd_soc_dai *codec_dai; 260 unsigned int rate, channels, sample_bits, symmetry, i; 261 262 rate = params_rate(params); 263 channels = params_channels(params); 264 sample_bits = snd_pcm_format_physical_width(params_format(params)); 265 266 /* reject unmatched parameters when applying symmetry */ 267 symmetry = cpu_dai->driver->symmetric_rates || 268 rtd->dai_link->symmetric_rates; 269 270 for_each_rtd_codec_dai(rtd, i, codec_dai) 271 symmetry |= codec_dai->driver->symmetric_rates; 272 273 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) { 274 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n", 275 cpu_dai->rate, rate); 276 return -EINVAL; 277 } 278 279 symmetry = cpu_dai->driver->symmetric_channels || 280 rtd->dai_link->symmetric_channels; 281 282 for_each_rtd_codec_dai(rtd, i, codec_dai) 283 symmetry |= codec_dai->driver->symmetric_channels; 284 285 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) { 286 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n", 287 cpu_dai->channels, channels); 288 return -EINVAL; 289 } 290 291 symmetry = cpu_dai->driver->symmetric_samplebits || 292 rtd->dai_link->symmetric_samplebits; 293 294 for_each_rtd_codec_dai(rtd, i, codec_dai) 295 symmetry |= codec_dai->driver->symmetric_samplebits; 296 297 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) { 298 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n", 299 cpu_dai->sample_bits, sample_bits); 300 return -EINVAL; 301 } 302 303 return 0; 304 } 305 306 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream) 307 { 308 struct snd_soc_pcm_runtime *rtd = substream->private_data; 309 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver; 310 struct snd_soc_dai_link *link = rtd->dai_link; 311 struct snd_soc_dai *codec_dai; 312 unsigned int symmetry, i; 313 314 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates || 315 cpu_driver->symmetric_channels || link->symmetric_channels || 316 cpu_driver->symmetric_samplebits || link->symmetric_samplebits; 317 318 for_each_rtd_codec_dai(rtd, i, codec_dai) 319 symmetry = symmetry || 320 codec_dai->driver->symmetric_rates || 321 codec_dai->driver->symmetric_channels || 322 codec_dai->driver->symmetric_samplebits; 323 324 return symmetry; 325 } 326 327 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 328 { 329 struct snd_soc_pcm_runtime *rtd = substream->private_data; 330 int ret; 331 332 if (!bits) 333 return; 334 335 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 336 if (ret != 0) 337 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 338 bits, ret); 339 } 340 341 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 342 { 343 struct snd_soc_pcm_runtime *rtd = substream->private_data; 344 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 345 struct snd_soc_dai *codec_dai; 346 int i; 347 unsigned int bits = 0, cpu_bits; 348 349 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 350 for_each_rtd_codec_dai(rtd, i, codec_dai) { 351 if (codec_dai->driver->playback.sig_bits == 0) { 352 bits = 0; 353 break; 354 } 355 bits = max(codec_dai->driver->playback.sig_bits, bits); 356 } 357 cpu_bits = cpu_dai->driver->playback.sig_bits; 358 } else { 359 for_each_rtd_codec_dai(rtd, i, codec_dai) { 360 if (codec_dai->driver->capture.sig_bits == 0) { 361 bits = 0; 362 break; 363 } 364 bits = max(codec_dai->driver->capture.sig_bits, bits); 365 } 366 cpu_bits = cpu_dai->driver->capture.sig_bits; 367 } 368 369 soc_pcm_set_msb(substream, bits); 370 soc_pcm_set_msb(substream, cpu_bits); 371 } 372 373 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 374 { 375 struct snd_pcm_runtime *runtime = substream->runtime; 376 struct snd_pcm_hardware *hw = &runtime->hw; 377 struct snd_soc_pcm_runtime *rtd = substream->private_data; 378 struct snd_soc_dai *codec_dai; 379 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver; 380 struct snd_soc_dai_driver *codec_dai_drv; 381 struct snd_soc_pcm_stream *codec_stream; 382 struct snd_soc_pcm_stream *cpu_stream; 383 unsigned int chan_min = 0, chan_max = UINT_MAX; 384 unsigned int rate_min = 0, rate_max = UINT_MAX; 385 unsigned int rates = UINT_MAX; 386 u64 formats = ULLONG_MAX; 387 int i; 388 389 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 390 cpu_stream = &cpu_dai_drv->playback; 391 else 392 cpu_stream = &cpu_dai_drv->capture; 393 394 /* first calculate min/max only for CODECs in the DAI link */ 395 for_each_rtd_codec_dai(rtd, i, codec_dai) { 396 397 /* 398 * Skip CODECs which don't support the current stream type. 399 * Otherwise, since the rate, channel, and format values will 400 * zero in that case, we would have no usable settings left, 401 * causing the resulting setup to fail. 402 * At least one CODEC should match, otherwise we should have 403 * bailed out on a higher level, since there would be no 404 * CODEC to support the transfer direction in that case. 405 */ 406 if (!snd_soc_dai_stream_valid(codec_dai, 407 substream->stream)) 408 continue; 409 410 codec_dai_drv = codec_dai->driver; 411 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 412 codec_stream = &codec_dai_drv->playback; 413 else 414 codec_stream = &codec_dai_drv->capture; 415 chan_min = max(chan_min, codec_stream->channels_min); 416 chan_max = min(chan_max, codec_stream->channels_max); 417 rate_min = max(rate_min, codec_stream->rate_min); 418 rate_max = min_not_zero(rate_max, codec_stream->rate_max); 419 formats &= codec_stream->formats; 420 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates); 421 } 422 423 /* 424 * chan min/max cannot be enforced if there are multiple CODEC DAIs 425 * connected to a single CPU DAI, use CPU DAI's directly and let 426 * channel allocation be fixed up later 427 */ 428 if (rtd->num_codecs > 1) { 429 chan_min = cpu_stream->channels_min; 430 chan_max = cpu_stream->channels_max; 431 } 432 433 hw->channels_min = max(chan_min, cpu_stream->channels_min); 434 hw->channels_max = min(chan_max, cpu_stream->channels_max); 435 if (hw->formats) 436 hw->formats &= formats & cpu_stream->formats; 437 else 438 hw->formats = formats & cpu_stream->formats; 439 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates); 440 441 snd_pcm_limit_hw_rates(runtime); 442 443 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min); 444 hw->rate_min = max(hw->rate_min, rate_min); 445 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max); 446 hw->rate_max = min_not_zero(hw->rate_max, rate_max); 447 } 448 449 static int soc_pcm_components_open(struct snd_pcm_substream *substream, 450 struct snd_soc_component **last) 451 { 452 struct snd_soc_pcm_runtime *rtd = substream->private_data; 453 struct snd_soc_rtdcom_list *rtdcom; 454 struct snd_soc_component *component; 455 int ret = 0; 456 457 for_each_rtdcom(rtd, rtdcom) { 458 component = rtdcom->component; 459 *last = component; 460 461 if (component->driver->module_get_upon_open && 462 !try_module_get(component->dev->driver->owner)) { 463 dev_err(component->dev, 464 "ASoC: can't get module %s\n", 465 component->name); 466 return -ENODEV; 467 } 468 469 if (!component->driver->ops || 470 !component->driver->ops->open) 471 continue; 472 473 ret = component->driver->ops->open(substream); 474 if (ret < 0) { 475 dev_err(component->dev, 476 "ASoC: can't open component %s: %d\n", 477 component->name, ret); 478 return ret; 479 } 480 } 481 *last = NULL; 482 return 0; 483 } 484 485 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 486 struct snd_soc_component *last) 487 { 488 struct snd_soc_pcm_runtime *rtd = substream->private_data; 489 struct snd_soc_rtdcom_list *rtdcom; 490 struct snd_soc_component *component; 491 492 for_each_rtdcom(rtd, rtdcom) { 493 component = rtdcom->component; 494 495 if (component == last) 496 break; 497 498 if (component->driver->ops && 499 component->driver->ops->close) 500 component->driver->ops->close(substream); 501 502 if (component->driver->module_get_upon_open) 503 module_put(component->dev->driver->owner); 504 } 505 506 return 0; 507 } 508 509 /* 510 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 511 * then initialized and any private data can be allocated. This also calls 512 * startup for the cpu DAI, component, machine and codec DAI. 513 */ 514 static int soc_pcm_open(struct snd_pcm_substream *substream) 515 { 516 struct snd_soc_pcm_runtime *rtd = substream->private_data; 517 struct snd_pcm_runtime *runtime = substream->runtime; 518 struct snd_soc_component *component; 519 struct snd_soc_rtdcom_list *rtdcom; 520 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 521 struct snd_soc_dai *codec_dai; 522 const char *codec_dai_name = "multicodec"; 523 int i, ret = 0; 524 525 pinctrl_pm_select_default_state(cpu_dai->dev); 526 for_each_rtd_codec_dai(rtd, i, codec_dai) 527 pinctrl_pm_select_default_state(codec_dai->dev); 528 529 for_each_rtdcom(rtd, rtdcom) { 530 component = rtdcom->component; 531 532 pm_runtime_get_sync(component->dev); 533 } 534 535 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 536 537 /* startup the audio subsystem */ 538 if (cpu_dai->driver->ops->startup) { 539 ret = cpu_dai->driver->ops->startup(substream, cpu_dai); 540 if (ret < 0) { 541 dev_err(cpu_dai->dev, "ASoC: can't open interface" 542 " %s: %d\n", cpu_dai->name, ret); 543 goto out; 544 } 545 } 546 547 ret = soc_pcm_components_open(substream, &component); 548 if (ret < 0) 549 goto component_err; 550 551 for_each_rtd_codec_dai(rtd, i, codec_dai) { 552 if (codec_dai->driver->ops->startup) { 553 ret = codec_dai->driver->ops->startup(substream, 554 codec_dai); 555 if (ret < 0) { 556 dev_err(codec_dai->dev, 557 "ASoC: can't open codec %s: %d\n", 558 codec_dai->name, ret); 559 goto codec_dai_err; 560 } 561 } 562 563 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 564 codec_dai->tx_mask = 0; 565 else 566 codec_dai->rx_mask = 0; 567 } 568 569 if (rtd->dai_link->ops->startup) { 570 ret = rtd->dai_link->ops->startup(substream); 571 if (ret < 0) { 572 pr_err("ASoC: %s startup failed: %d\n", 573 rtd->dai_link->name, ret); 574 goto machine_err; 575 } 576 } 577 578 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 579 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 580 goto dynamic; 581 582 /* Check that the codec and cpu DAIs are compatible */ 583 soc_pcm_init_runtime_hw(substream); 584 585 if (rtd->num_codecs == 1) 586 codec_dai_name = rtd->codec_dai->name; 587 588 if (soc_pcm_has_symmetry(substream)) 589 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 590 591 ret = -EINVAL; 592 if (!runtime->hw.rates) { 593 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n", 594 codec_dai_name, cpu_dai->name); 595 goto config_err; 596 } 597 if (!runtime->hw.formats) { 598 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n", 599 codec_dai_name, cpu_dai->name); 600 goto config_err; 601 } 602 if (!runtime->hw.channels_min || !runtime->hw.channels_max || 603 runtime->hw.channels_min > runtime->hw.channels_max) { 604 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n", 605 codec_dai_name, cpu_dai->name); 606 goto config_err; 607 } 608 609 soc_pcm_apply_msb(substream); 610 611 /* Symmetry only applies if we've already got an active stream. */ 612 if (cpu_dai->active) { 613 ret = soc_pcm_apply_symmetry(substream, cpu_dai); 614 if (ret != 0) 615 goto config_err; 616 } 617 618 for_each_rtd_codec_dai(rtd, i, codec_dai) { 619 if (codec_dai->active) { 620 ret = soc_pcm_apply_symmetry(substream, codec_dai); 621 if (ret != 0) 622 goto config_err; 623 } 624 } 625 626 pr_debug("ASoC: %s <-> %s info:\n", 627 codec_dai_name, cpu_dai->name); 628 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates); 629 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min, 630 runtime->hw.channels_max); 631 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min, 632 runtime->hw.rate_max); 633 634 dynamic: 635 636 snd_soc_runtime_activate(rtd, substream->stream); 637 638 mutex_unlock(&rtd->pcm_mutex); 639 return 0; 640 641 config_err: 642 if (rtd->dai_link->ops->shutdown) 643 rtd->dai_link->ops->shutdown(substream); 644 645 machine_err: 646 i = rtd->num_codecs; 647 648 codec_dai_err: 649 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) { 650 if (codec_dai->driver->ops->shutdown) 651 codec_dai->driver->ops->shutdown(substream, codec_dai); 652 } 653 654 component_err: 655 soc_pcm_components_close(substream, component); 656 657 if (cpu_dai->driver->ops->shutdown) 658 cpu_dai->driver->ops->shutdown(substream, cpu_dai); 659 out: 660 mutex_unlock(&rtd->pcm_mutex); 661 662 for_each_rtdcom(rtd, rtdcom) { 663 component = rtdcom->component; 664 665 pm_runtime_mark_last_busy(component->dev); 666 pm_runtime_put_autosuspend(component->dev); 667 } 668 669 for_each_rtd_codec_dai(rtd, i, codec_dai) { 670 if (!codec_dai->active) 671 pinctrl_pm_select_sleep_state(codec_dai->dev); 672 } 673 if (!cpu_dai->active) 674 pinctrl_pm_select_sleep_state(cpu_dai->dev); 675 676 return ret; 677 } 678 679 /* 680 * Power down the audio subsystem pmdown_time msecs after close is called. 681 * This is to ensure there are no pops or clicks in between any music tracks 682 * due to DAPM power cycling. 683 */ 684 static void close_delayed_work(struct work_struct *work) 685 { 686 struct snd_soc_pcm_runtime *rtd = 687 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work); 688 struct snd_soc_dai *codec_dai = rtd->codec_dais[0]; 689 690 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 691 692 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n", 693 codec_dai->driver->playback.stream_name, 694 codec_dai->playback_active ? "active" : "inactive", 695 rtd->pop_wait ? "yes" : "no"); 696 697 /* are we waiting on this codec DAI stream */ 698 if (rtd->pop_wait == 1) { 699 rtd->pop_wait = 0; 700 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, 701 SND_SOC_DAPM_STREAM_STOP); 702 } 703 704 mutex_unlock(&rtd->pcm_mutex); 705 } 706 707 /* 708 * Called by ALSA when a PCM substream is closed. Private data can be 709 * freed here. The cpu DAI, codec DAI, machine and components are also 710 * shutdown. 711 */ 712 static int soc_pcm_close(struct snd_pcm_substream *substream) 713 { 714 struct snd_soc_pcm_runtime *rtd = substream->private_data; 715 struct snd_soc_component *component; 716 struct snd_soc_rtdcom_list *rtdcom; 717 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 718 struct snd_soc_dai *codec_dai; 719 int i; 720 721 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 722 723 snd_soc_runtime_deactivate(rtd, substream->stream); 724 725 /* clear the corresponding DAIs rate when inactive */ 726 if (!cpu_dai->active) 727 cpu_dai->rate = 0; 728 729 for_each_rtd_codec_dai(rtd, i, codec_dai) { 730 if (!codec_dai->active) 731 codec_dai->rate = 0; 732 } 733 734 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream); 735 736 if (cpu_dai->driver->ops->shutdown) 737 cpu_dai->driver->ops->shutdown(substream, cpu_dai); 738 739 for_each_rtd_codec_dai(rtd, i, codec_dai) { 740 if (codec_dai->driver->ops->shutdown) 741 codec_dai->driver->ops->shutdown(substream, codec_dai); 742 } 743 744 if (rtd->dai_link->ops->shutdown) 745 rtd->dai_link->ops->shutdown(substream); 746 747 soc_pcm_components_close(substream, NULL); 748 749 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 750 if (snd_soc_runtime_ignore_pmdown_time(rtd)) { 751 /* powered down playback stream now */ 752 snd_soc_dapm_stream_event(rtd, 753 SNDRV_PCM_STREAM_PLAYBACK, 754 SND_SOC_DAPM_STREAM_STOP); 755 } else { 756 /* start delayed pop wq here for playback streams */ 757 rtd->pop_wait = 1; 758 queue_delayed_work(system_power_efficient_wq, 759 &rtd->delayed_work, 760 msecs_to_jiffies(rtd->pmdown_time)); 761 } 762 } else { 763 /* capture streams can be powered down now */ 764 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE, 765 SND_SOC_DAPM_STREAM_STOP); 766 } 767 768 mutex_unlock(&rtd->pcm_mutex); 769 770 for_each_rtdcom(rtd, rtdcom) { 771 component = rtdcom->component; 772 773 pm_runtime_mark_last_busy(component->dev); 774 pm_runtime_put_autosuspend(component->dev); 775 } 776 777 for_each_rtd_codec_dai(rtd, i, codec_dai) { 778 if (!codec_dai->active) 779 pinctrl_pm_select_sleep_state(codec_dai->dev); 780 } 781 if (!cpu_dai->active) 782 pinctrl_pm_select_sleep_state(cpu_dai->dev); 783 784 return 0; 785 } 786 787 /* 788 * Called by ALSA when the PCM substream is prepared, can set format, sample 789 * rate, etc. This function is non atomic and can be called multiple times, 790 * it can refer to the runtime info. 791 */ 792 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 793 { 794 struct snd_soc_pcm_runtime *rtd = substream->private_data; 795 struct snd_soc_component *component; 796 struct snd_soc_rtdcom_list *rtdcom; 797 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 798 struct snd_soc_dai *codec_dai; 799 int i, ret = 0; 800 801 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 802 803 if (rtd->dai_link->ops->prepare) { 804 ret = rtd->dai_link->ops->prepare(substream); 805 if (ret < 0) { 806 dev_err(rtd->card->dev, "ASoC: machine prepare error:" 807 " %d\n", ret); 808 goto out; 809 } 810 } 811 812 for_each_rtdcom(rtd, rtdcom) { 813 component = rtdcom->component; 814 815 if (!component->driver->ops || 816 !component->driver->ops->prepare) 817 continue; 818 819 ret = component->driver->ops->prepare(substream); 820 if (ret < 0) { 821 dev_err(component->dev, 822 "ASoC: platform prepare error: %d\n", ret); 823 goto out; 824 } 825 } 826 827 for_each_rtd_codec_dai(rtd, i, codec_dai) { 828 if (codec_dai->driver->ops->prepare) { 829 ret = codec_dai->driver->ops->prepare(substream, 830 codec_dai); 831 if (ret < 0) { 832 dev_err(codec_dai->dev, 833 "ASoC: codec DAI prepare error: %d\n", 834 ret); 835 goto out; 836 } 837 } 838 } 839 840 if (cpu_dai->driver->ops->prepare) { 841 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai); 842 if (ret < 0) { 843 dev_err(cpu_dai->dev, 844 "ASoC: cpu DAI prepare error: %d\n", ret); 845 goto out; 846 } 847 } 848 849 /* cancel any delayed stream shutdown that is pending */ 850 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 851 rtd->pop_wait) { 852 rtd->pop_wait = 0; 853 cancel_delayed_work(&rtd->delayed_work); 854 } 855 856 snd_soc_dapm_stream_event(rtd, substream->stream, 857 SND_SOC_DAPM_STREAM_START); 858 859 for_each_rtd_codec_dai(rtd, i, codec_dai) 860 snd_soc_dai_digital_mute(codec_dai, 0, 861 substream->stream); 862 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream); 863 864 out: 865 mutex_unlock(&rtd->pcm_mutex); 866 return ret; 867 } 868 869 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 870 unsigned int mask) 871 { 872 struct snd_interval *interval; 873 int channels = hweight_long(mask); 874 875 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 876 interval->min = channels; 877 interval->max = channels; 878 } 879 880 int soc_dai_hw_params(struct snd_pcm_substream *substream, 881 struct snd_pcm_hw_params *params, 882 struct snd_soc_dai *dai) 883 { 884 struct snd_soc_pcm_runtime *rtd = substream->private_data; 885 int ret; 886 887 /* perform any topology hw_params fixups before DAI */ 888 if (rtd->dai_link->be_hw_params_fixup) { 889 ret = rtd->dai_link->be_hw_params_fixup(rtd, params); 890 if (ret < 0) { 891 dev_err(rtd->dev, 892 "ASoC: hw_params topology fixup failed %d\n", 893 ret); 894 return ret; 895 } 896 } 897 898 if (dai->driver->ops->hw_params) { 899 ret = dai->driver->ops->hw_params(substream, params, dai); 900 if (ret < 0) { 901 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n", 902 dai->name, ret); 903 return ret; 904 } 905 } 906 907 return 0; 908 } 909 910 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream, 911 struct snd_soc_component *last) 912 { 913 struct snd_soc_pcm_runtime *rtd = substream->private_data; 914 struct snd_soc_rtdcom_list *rtdcom; 915 struct snd_soc_component *component; 916 917 for_each_rtdcom(rtd, rtdcom) { 918 component = rtdcom->component; 919 920 if (component == last) 921 break; 922 923 if (!component->driver->ops || 924 !component->driver->ops->hw_free) 925 continue; 926 927 component->driver->ops->hw_free(substream); 928 } 929 930 return 0; 931 } 932 933 /* 934 * Called by ALSA when the hardware params are set by application. This 935 * function can also be called multiple times and can allocate buffers 936 * (using snd_pcm_lib_* ). It's non-atomic. 937 */ 938 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 939 struct snd_pcm_hw_params *params) 940 { 941 struct snd_soc_pcm_runtime *rtd = substream->private_data; 942 struct snd_soc_component *component; 943 struct snd_soc_rtdcom_list *rtdcom; 944 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 945 struct snd_soc_dai *codec_dai; 946 int i, ret = 0; 947 948 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 949 if (rtd->dai_link->ops->hw_params) { 950 ret = rtd->dai_link->ops->hw_params(substream, params); 951 if (ret < 0) { 952 dev_err(rtd->card->dev, "ASoC: machine hw_params" 953 " failed: %d\n", ret); 954 goto out; 955 } 956 } 957 958 for_each_rtd_codec_dai(rtd, i, codec_dai) { 959 struct snd_pcm_hw_params codec_params; 960 961 /* 962 * Skip CODECs which don't support the current stream type, 963 * the idea being that if a CODEC is not used for the currently 964 * set up transfer direction, it should not need to be 965 * configured, especially since the configuration used might 966 * not even be supported by that CODEC. There may be cases 967 * however where a CODEC needs to be set up although it is 968 * actually not being used for the transfer, e.g. if a 969 * capture-only CODEC is acting as an LRCLK and/or BCLK master 970 * for the DAI link including a playback-only CODEC. 971 * If this becomes necessary, we will have to augment the 972 * machine driver setup with information on how to act, so 973 * we can do the right thing here. 974 */ 975 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 976 continue; 977 978 /* copy params for each codec */ 979 codec_params = *params; 980 981 /* fixup params based on TDM slot masks */ 982 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 983 codec_dai->tx_mask) 984 soc_pcm_codec_params_fixup(&codec_params, 985 codec_dai->tx_mask); 986 987 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 988 codec_dai->rx_mask) 989 soc_pcm_codec_params_fixup(&codec_params, 990 codec_dai->rx_mask); 991 992 ret = soc_dai_hw_params(substream, &codec_params, codec_dai); 993 if(ret < 0) 994 goto codec_err; 995 996 codec_dai->rate = params_rate(&codec_params); 997 codec_dai->channels = params_channels(&codec_params); 998 codec_dai->sample_bits = snd_pcm_format_physical_width( 999 params_format(&codec_params)); 1000 1001 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 1002 } 1003 1004 ret = soc_dai_hw_params(substream, params, cpu_dai); 1005 if (ret < 0) 1006 goto interface_err; 1007 1008 /* store the parameters for each DAIs */ 1009 cpu_dai->rate = params_rate(params); 1010 cpu_dai->channels = params_channels(params); 1011 cpu_dai->sample_bits = 1012 snd_pcm_format_physical_width(params_format(params)); 1013 1014 snd_soc_dapm_update_dai(substream, params, cpu_dai); 1015 1016 for_each_rtdcom(rtd, rtdcom) { 1017 component = rtdcom->component; 1018 1019 if (!component->driver->ops || 1020 !component->driver->ops->hw_params) 1021 continue; 1022 1023 ret = component->driver->ops->hw_params(substream, params); 1024 if (ret < 0) { 1025 dev_err(component->dev, 1026 "ASoC: %s hw params failed: %d\n", 1027 component->name, ret); 1028 goto component_err; 1029 } 1030 } 1031 component = NULL; 1032 1033 ret = soc_pcm_params_symmetry(substream, params); 1034 if (ret) 1035 goto component_err; 1036 out: 1037 mutex_unlock(&rtd->pcm_mutex); 1038 return ret; 1039 1040 component_err: 1041 soc_pcm_components_hw_free(substream, component); 1042 1043 if (cpu_dai->driver->ops->hw_free) 1044 cpu_dai->driver->ops->hw_free(substream, cpu_dai); 1045 cpu_dai->rate = 0; 1046 1047 interface_err: 1048 i = rtd->num_codecs; 1049 1050 codec_err: 1051 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) { 1052 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1053 continue; 1054 1055 if (codec_dai->driver->ops->hw_free) 1056 codec_dai->driver->ops->hw_free(substream, codec_dai); 1057 codec_dai->rate = 0; 1058 } 1059 1060 if (rtd->dai_link->ops->hw_free) 1061 rtd->dai_link->ops->hw_free(substream); 1062 1063 mutex_unlock(&rtd->pcm_mutex); 1064 return ret; 1065 } 1066 1067 /* 1068 * Frees resources allocated by hw_params, can be called multiple times 1069 */ 1070 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 1071 { 1072 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1073 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1074 struct snd_soc_dai *codec_dai; 1075 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 1076 int i; 1077 1078 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 1079 1080 /* clear the corresponding DAIs parameters when going to be inactive */ 1081 if (cpu_dai->active == 1) { 1082 cpu_dai->rate = 0; 1083 cpu_dai->channels = 0; 1084 cpu_dai->sample_bits = 0; 1085 } 1086 1087 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1088 if (codec_dai->active == 1) { 1089 codec_dai->rate = 0; 1090 codec_dai->channels = 0; 1091 codec_dai->sample_bits = 0; 1092 } 1093 } 1094 1095 /* apply codec digital mute */ 1096 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1097 if ((playback && codec_dai->playback_active == 1) || 1098 (!playback && codec_dai->capture_active == 1)) 1099 snd_soc_dai_digital_mute(codec_dai, 1, 1100 substream->stream); 1101 } 1102 1103 /* free any machine hw params */ 1104 if (rtd->dai_link->ops->hw_free) 1105 rtd->dai_link->ops->hw_free(substream); 1106 1107 /* free any component resources */ 1108 soc_pcm_components_hw_free(substream, NULL); 1109 1110 /* now free hw params for the DAIs */ 1111 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1112 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1113 continue; 1114 1115 if (codec_dai->driver->ops->hw_free) 1116 codec_dai->driver->ops->hw_free(substream, codec_dai); 1117 } 1118 1119 if (cpu_dai->driver->ops->hw_free) 1120 cpu_dai->driver->ops->hw_free(substream, cpu_dai); 1121 1122 mutex_unlock(&rtd->pcm_mutex); 1123 return 0; 1124 } 1125 1126 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1127 { 1128 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1129 struct snd_soc_component *component; 1130 struct snd_soc_rtdcom_list *rtdcom; 1131 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1132 struct snd_soc_dai *codec_dai; 1133 int i, ret; 1134 1135 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1136 if (codec_dai->driver->ops->trigger) { 1137 ret = codec_dai->driver->ops->trigger(substream, 1138 cmd, codec_dai); 1139 if (ret < 0) 1140 return ret; 1141 } 1142 } 1143 1144 for_each_rtdcom(rtd, rtdcom) { 1145 component = rtdcom->component; 1146 1147 if (!component->driver->ops || 1148 !component->driver->ops->trigger) 1149 continue; 1150 1151 ret = component->driver->ops->trigger(substream, cmd); 1152 if (ret < 0) 1153 return ret; 1154 } 1155 1156 if (cpu_dai->driver->ops->trigger) { 1157 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai); 1158 if (ret < 0) 1159 return ret; 1160 } 1161 1162 if (rtd->dai_link->ops->trigger) { 1163 ret = rtd->dai_link->ops->trigger(substream, cmd); 1164 if (ret < 0) 1165 return ret; 1166 } 1167 1168 return 0; 1169 } 1170 1171 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream, 1172 int cmd) 1173 { 1174 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1175 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1176 struct snd_soc_dai *codec_dai; 1177 int i, ret; 1178 1179 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1180 if (codec_dai->driver->ops->bespoke_trigger) { 1181 ret = codec_dai->driver->ops->bespoke_trigger(substream, 1182 cmd, codec_dai); 1183 if (ret < 0) 1184 return ret; 1185 } 1186 } 1187 1188 if (cpu_dai->driver->ops->bespoke_trigger) { 1189 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai); 1190 if (ret < 0) 1191 return ret; 1192 } 1193 return 0; 1194 } 1195 /* 1196 * soc level wrapper for pointer callback 1197 * If cpu_dai, codec_dai, component driver has the delay callback, then 1198 * the runtime->delay will be updated accordingly. 1199 */ 1200 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1201 { 1202 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1203 struct snd_soc_component *component; 1204 struct snd_soc_rtdcom_list *rtdcom; 1205 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1206 struct snd_soc_dai *codec_dai; 1207 struct snd_pcm_runtime *runtime = substream->runtime; 1208 snd_pcm_uframes_t offset = 0; 1209 snd_pcm_sframes_t delay = 0; 1210 snd_pcm_sframes_t codec_delay = 0; 1211 int i; 1212 1213 /* clearing the previous total delay */ 1214 runtime->delay = 0; 1215 1216 for_each_rtdcom(rtd, rtdcom) { 1217 component = rtdcom->component; 1218 1219 if (!component->driver->ops || 1220 !component->driver->ops->pointer) 1221 continue; 1222 1223 /* FIXME: use 1st pointer */ 1224 offset = component->driver->ops->pointer(substream); 1225 break; 1226 } 1227 /* base delay if assigned in pointer callback */ 1228 delay = runtime->delay; 1229 1230 if (cpu_dai->driver->ops->delay) 1231 delay += cpu_dai->driver->ops->delay(substream, cpu_dai); 1232 1233 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1234 if (codec_dai->driver->ops->delay) 1235 codec_delay = max(codec_delay, 1236 codec_dai->driver->ops->delay(substream, 1237 codec_dai)); 1238 } 1239 delay += codec_delay; 1240 1241 runtime->delay = delay; 1242 1243 return offset; 1244 } 1245 1246 /* connect a FE and BE */ 1247 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1248 struct snd_soc_pcm_runtime *be, int stream) 1249 { 1250 struct snd_soc_dpcm *dpcm; 1251 unsigned long flags; 1252 1253 /* only add new dpcms */ 1254 for_each_dpcm_be(fe, stream, dpcm) { 1255 if (dpcm->be == be && dpcm->fe == fe) 1256 return 0; 1257 } 1258 1259 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1260 if (!dpcm) 1261 return -ENOMEM; 1262 1263 dpcm->be = be; 1264 dpcm->fe = fe; 1265 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1266 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1267 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1268 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1269 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1270 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1271 1272 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1273 stream ? "capture" : "playback", fe->dai_link->name, 1274 stream ? "<-" : "->", be->dai_link->name); 1275 1276 #ifdef CONFIG_DEBUG_FS 1277 if (fe->debugfs_dpcm_root) 1278 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644, 1279 fe->debugfs_dpcm_root, &dpcm->state); 1280 #endif 1281 return 1; 1282 } 1283 1284 /* reparent a BE onto another FE */ 1285 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1286 struct snd_soc_pcm_runtime *be, int stream) 1287 { 1288 struct snd_soc_dpcm *dpcm; 1289 struct snd_pcm_substream *fe_substream, *be_substream; 1290 1291 /* reparent if BE is connected to other FEs */ 1292 if (!be->dpcm[stream].users) 1293 return; 1294 1295 be_substream = snd_soc_dpcm_get_substream(be, stream); 1296 1297 for_each_dpcm_fe(be, stream, dpcm) { 1298 if (dpcm->fe == fe) 1299 continue; 1300 1301 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1302 stream ? "capture" : "playback", 1303 dpcm->fe->dai_link->name, 1304 stream ? "<-" : "->", dpcm->be->dai_link->name); 1305 1306 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1307 be_substream->runtime = fe_substream->runtime; 1308 break; 1309 } 1310 } 1311 1312 /* disconnect a BE and FE */ 1313 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1314 { 1315 struct snd_soc_dpcm *dpcm, *d; 1316 unsigned long flags; 1317 1318 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1319 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1320 stream ? "capture" : "playback", 1321 dpcm->be->dai_link->name); 1322 1323 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1324 continue; 1325 1326 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1327 stream ? "capture" : "playback", fe->dai_link->name, 1328 stream ? "<-" : "->", dpcm->be->dai_link->name); 1329 1330 /* BEs still alive need new FE */ 1331 dpcm_be_reparent(fe, dpcm->be, stream); 1332 1333 #ifdef CONFIG_DEBUG_FS 1334 debugfs_remove(dpcm->debugfs_state); 1335 #endif 1336 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1337 list_del(&dpcm->list_be); 1338 list_del(&dpcm->list_fe); 1339 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1340 kfree(dpcm); 1341 } 1342 } 1343 1344 /* get BE for DAI widget and stream */ 1345 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1346 struct snd_soc_dapm_widget *widget, int stream) 1347 { 1348 struct snd_soc_pcm_runtime *be; 1349 struct snd_soc_dai *dai; 1350 int i; 1351 1352 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1353 1354 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1355 for_each_card_rtds(card, be) { 1356 1357 if (!be->dai_link->no_pcm) 1358 continue; 1359 1360 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1361 be->cpu_dai->playback_widget ? 1362 be->cpu_dai->playback_widget->name : "(not set)"); 1363 1364 if (be->cpu_dai->playback_widget == widget) 1365 return be; 1366 1367 for_each_rtd_codec_dai(be, i, dai) { 1368 if (dai->playback_widget == widget) 1369 return be; 1370 } 1371 } 1372 } else { 1373 1374 for_each_card_rtds(card, be) { 1375 1376 if (!be->dai_link->no_pcm) 1377 continue; 1378 1379 dev_dbg(card->dev, "ASoC: try BE %s\n", 1380 be->cpu_dai->capture_widget ? 1381 be->cpu_dai->capture_widget->name : "(not set)"); 1382 1383 if (be->cpu_dai->capture_widget == widget) 1384 return be; 1385 1386 for_each_rtd_codec_dai(be, i, dai) { 1387 if (dai->capture_widget == widget) 1388 return be; 1389 } 1390 } 1391 } 1392 1393 /* dai link name and stream name set correctly ? */ 1394 dev_err(card->dev, "ASoC: can't get %s BE for %s\n", 1395 stream ? "capture" : "playback", widget->name); 1396 return NULL; 1397 } 1398 1399 static inline struct snd_soc_dapm_widget * 1400 dai_get_widget(struct snd_soc_dai *dai, int stream) 1401 { 1402 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1403 return dai->playback_widget; 1404 else 1405 return dai->capture_widget; 1406 } 1407 1408 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1409 struct snd_soc_dapm_widget *widget) 1410 { 1411 int i; 1412 1413 for (i = 0; i < list->num_widgets; i++) { 1414 if (widget == list->widgets[i]) 1415 return 1; 1416 } 1417 1418 return 0; 1419 } 1420 1421 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, 1422 enum snd_soc_dapm_direction dir) 1423 { 1424 struct snd_soc_card *card = widget->dapm->card; 1425 struct snd_soc_pcm_runtime *rtd; 1426 struct snd_soc_dai *dai; 1427 int i; 1428 1429 if (dir == SND_SOC_DAPM_DIR_OUT) { 1430 for_each_card_rtds(card, rtd) { 1431 if (!rtd->dai_link->no_pcm) 1432 continue; 1433 1434 if (rtd->cpu_dai->playback_widget == widget) 1435 return true; 1436 1437 for_each_rtd_codec_dai(rtd, i, dai) { 1438 if (dai->playback_widget == widget) 1439 return true; 1440 } 1441 } 1442 } else { /* SND_SOC_DAPM_DIR_IN */ 1443 for_each_card_rtds(card, rtd) { 1444 if (!rtd->dai_link->no_pcm) 1445 continue; 1446 1447 if (rtd->cpu_dai->capture_widget == widget) 1448 return true; 1449 1450 for_each_rtd_codec_dai(rtd, i, dai) { 1451 if (dai->capture_widget == widget) 1452 return true; 1453 } 1454 } 1455 } 1456 1457 return false; 1458 } 1459 1460 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1461 int stream, struct snd_soc_dapm_widget_list **list) 1462 { 1463 struct snd_soc_dai *cpu_dai = fe->cpu_dai; 1464 int paths; 1465 1466 /* get number of valid DAI paths and their widgets */ 1467 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1468 dpcm_end_walk_at_be); 1469 1470 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1471 stream ? "capture" : "playback"); 1472 1473 return paths; 1474 } 1475 1476 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1477 struct snd_soc_dapm_widget_list **list_) 1478 { 1479 struct snd_soc_dpcm *dpcm; 1480 struct snd_soc_dapm_widget_list *list = *list_; 1481 struct snd_soc_dapm_widget *widget; 1482 struct snd_soc_dai *dai; 1483 int prune = 0; 1484 1485 /* Destroy any old FE <--> BE connections */ 1486 for_each_dpcm_be(fe, stream, dpcm) { 1487 unsigned int i; 1488 1489 /* is there a valid CPU DAI widget for this BE */ 1490 widget = dai_get_widget(dpcm->be->cpu_dai, stream); 1491 1492 /* prune the BE if it's no longer in our active list */ 1493 if (widget && widget_in_list(list, widget)) 1494 continue; 1495 1496 /* is there a valid CODEC DAI widget for this BE */ 1497 for_each_rtd_codec_dai(dpcm->be, i, dai) { 1498 widget = dai_get_widget(dai, stream); 1499 1500 /* prune the BE if it's no longer in our active list */ 1501 if (widget && widget_in_list(list, widget)) 1502 continue; 1503 } 1504 1505 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1506 stream ? "capture" : "playback", 1507 dpcm->be->dai_link->name, fe->dai_link->name); 1508 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1509 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1510 prune++; 1511 } 1512 1513 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1514 return prune; 1515 } 1516 1517 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1518 struct snd_soc_dapm_widget_list **list_) 1519 { 1520 struct snd_soc_card *card = fe->card; 1521 struct snd_soc_dapm_widget_list *list = *list_; 1522 struct snd_soc_pcm_runtime *be; 1523 int i, new = 0, err; 1524 1525 /* Create any new FE <--> BE connections */ 1526 for (i = 0; i < list->num_widgets; i++) { 1527 1528 switch (list->widgets[i]->id) { 1529 case snd_soc_dapm_dai_in: 1530 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1531 continue; 1532 break; 1533 case snd_soc_dapm_dai_out: 1534 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1535 continue; 1536 break; 1537 default: 1538 continue; 1539 } 1540 1541 /* is there a valid BE rtd for this widget */ 1542 be = dpcm_get_be(card, list->widgets[i], stream); 1543 if (!be) { 1544 dev_err(fe->dev, "ASoC: no BE found for %s\n", 1545 list->widgets[i]->name); 1546 continue; 1547 } 1548 1549 /* make sure BE is a real BE */ 1550 if (!be->dai_link->no_pcm) 1551 continue; 1552 1553 /* don't connect if FE is not running */ 1554 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1555 continue; 1556 1557 /* newly connected FE and BE */ 1558 err = dpcm_be_connect(fe, be, stream); 1559 if (err < 0) { 1560 dev_err(fe->dev, "ASoC: can't connect %s\n", 1561 list->widgets[i]->name); 1562 break; 1563 } else if (err == 0) /* already connected */ 1564 continue; 1565 1566 /* new */ 1567 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1568 new++; 1569 } 1570 1571 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1572 return new; 1573 } 1574 1575 /* 1576 * Find the corresponding BE DAIs that source or sink audio to this 1577 * FE substream. 1578 */ 1579 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1580 int stream, struct snd_soc_dapm_widget_list **list, int new) 1581 { 1582 if (new) 1583 return dpcm_add_paths(fe, stream, list); 1584 else 1585 return dpcm_prune_paths(fe, stream, list); 1586 } 1587 1588 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1589 { 1590 struct snd_soc_dpcm *dpcm; 1591 unsigned long flags; 1592 1593 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1594 for_each_dpcm_be(fe, stream, dpcm) 1595 dpcm->be->dpcm[stream].runtime_update = 1596 SND_SOC_DPCM_UPDATE_NO; 1597 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1598 } 1599 1600 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1601 int stream) 1602 { 1603 struct snd_soc_dpcm *dpcm; 1604 1605 /* disable any enabled and non active backends */ 1606 for_each_dpcm_be(fe, stream, dpcm) { 1607 1608 struct snd_soc_pcm_runtime *be = dpcm->be; 1609 struct snd_pcm_substream *be_substream = 1610 snd_soc_dpcm_get_substream(be, stream); 1611 1612 if (be->dpcm[stream].users == 0) 1613 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1614 stream ? "capture" : "playback", 1615 be->dpcm[stream].state); 1616 1617 if (--be->dpcm[stream].users != 0) 1618 continue; 1619 1620 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1621 continue; 1622 1623 soc_pcm_close(be_substream); 1624 be_substream->runtime = NULL; 1625 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1626 } 1627 } 1628 1629 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1630 { 1631 struct snd_soc_dpcm *dpcm; 1632 int err, count = 0; 1633 1634 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1635 for_each_dpcm_be(fe, stream, dpcm) { 1636 1637 struct snd_soc_pcm_runtime *be = dpcm->be; 1638 struct snd_pcm_substream *be_substream = 1639 snd_soc_dpcm_get_substream(be, stream); 1640 1641 if (!be_substream) { 1642 dev_err(be->dev, "ASoC: no backend %s stream\n", 1643 stream ? "capture" : "playback"); 1644 continue; 1645 } 1646 1647 /* is this op for this BE ? */ 1648 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1649 continue; 1650 1651 /* first time the dpcm is open ? */ 1652 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1653 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1654 stream ? "capture" : "playback", 1655 be->dpcm[stream].state); 1656 1657 if (be->dpcm[stream].users++ != 0) 1658 continue; 1659 1660 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1661 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1662 continue; 1663 1664 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1665 stream ? "capture" : "playback", be->dai_link->name); 1666 1667 be_substream->runtime = be->dpcm[stream].runtime; 1668 err = soc_pcm_open(be_substream); 1669 if (err < 0) { 1670 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1671 be->dpcm[stream].users--; 1672 if (be->dpcm[stream].users < 0) 1673 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1674 stream ? "capture" : "playback", 1675 be->dpcm[stream].state); 1676 1677 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1678 goto unwind; 1679 } 1680 1681 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1682 count++; 1683 } 1684 1685 return count; 1686 1687 unwind: 1688 /* disable any enabled and non active backends */ 1689 for_each_dpcm_be_rollback(fe, stream, dpcm) { 1690 struct snd_soc_pcm_runtime *be = dpcm->be; 1691 struct snd_pcm_substream *be_substream = 1692 snd_soc_dpcm_get_substream(be, stream); 1693 1694 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1695 continue; 1696 1697 if (be->dpcm[stream].users == 0) 1698 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1699 stream ? "capture" : "playback", 1700 be->dpcm[stream].state); 1701 1702 if (--be->dpcm[stream].users != 0) 1703 continue; 1704 1705 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1706 continue; 1707 1708 soc_pcm_close(be_substream); 1709 be_substream->runtime = NULL; 1710 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1711 } 1712 1713 return err; 1714 } 1715 1716 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 1717 struct snd_soc_pcm_stream *stream) 1718 { 1719 runtime->hw.rate_min = stream->rate_min; 1720 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX); 1721 runtime->hw.channels_min = stream->channels_min; 1722 runtime->hw.channels_max = stream->channels_max; 1723 if (runtime->hw.formats) 1724 runtime->hw.formats &= stream->formats; 1725 else 1726 runtime->hw.formats = stream->formats; 1727 runtime->hw.rates = stream->rates; 1728 } 1729 1730 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream, 1731 u64 *formats) 1732 { 1733 struct snd_soc_pcm_runtime *fe = substream->private_data; 1734 struct snd_soc_dpcm *dpcm; 1735 struct snd_soc_dai *dai; 1736 int stream = substream->stream; 1737 1738 if (!fe->dai_link->dpcm_merged_format) 1739 return; 1740 1741 /* 1742 * It returns merged BE codec format 1743 * if FE want to use it (= dpcm_merged_format) 1744 */ 1745 1746 for_each_dpcm_be(fe, stream, dpcm) { 1747 struct snd_soc_pcm_runtime *be = dpcm->be; 1748 struct snd_soc_dai_driver *codec_dai_drv; 1749 struct snd_soc_pcm_stream *codec_stream; 1750 int i; 1751 1752 for_each_rtd_codec_dai(be, i, dai) { 1753 /* 1754 * Skip CODECs which don't support the current stream 1755 * type. See soc_pcm_init_runtime_hw() for more details 1756 */ 1757 if (!snd_soc_dai_stream_valid(dai, stream)) 1758 continue; 1759 1760 codec_dai_drv = dai->driver; 1761 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1762 codec_stream = &codec_dai_drv->playback; 1763 else 1764 codec_stream = &codec_dai_drv->capture; 1765 1766 *formats &= codec_stream->formats; 1767 } 1768 } 1769 } 1770 1771 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream, 1772 unsigned int *channels_min, 1773 unsigned int *channels_max) 1774 { 1775 struct snd_soc_pcm_runtime *fe = substream->private_data; 1776 struct snd_soc_dpcm *dpcm; 1777 int stream = substream->stream; 1778 1779 if (!fe->dai_link->dpcm_merged_chan) 1780 return; 1781 1782 /* 1783 * It returns merged BE codec channel; 1784 * if FE want to use it (= dpcm_merged_chan) 1785 */ 1786 1787 for_each_dpcm_be(fe, stream, dpcm) { 1788 struct snd_soc_pcm_runtime *be = dpcm->be; 1789 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver; 1790 struct snd_soc_dai_driver *codec_dai_drv; 1791 struct snd_soc_pcm_stream *codec_stream; 1792 struct snd_soc_pcm_stream *cpu_stream; 1793 1794 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1795 cpu_stream = &cpu_dai_drv->playback; 1796 else 1797 cpu_stream = &cpu_dai_drv->capture; 1798 1799 *channels_min = max(*channels_min, cpu_stream->channels_min); 1800 *channels_max = min(*channels_max, cpu_stream->channels_max); 1801 1802 /* 1803 * chan min/max cannot be enforced if there are multiple CODEC 1804 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1805 */ 1806 if (be->num_codecs == 1) { 1807 codec_dai_drv = be->codec_dais[0]->driver; 1808 1809 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1810 codec_stream = &codec_dai_drv->playback; 1811 else 1812 codec_stream = &codec_dai_drv->capture; 1813 1814 *channels_min = max(*channels_min, 1815 codec_stream->channels_min); 1816 *channels_max = min(*channels_max, 1817 codec_stream->channels_max); 1818 } 1819 } 1820 } 1821 1822 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream, 1823 unsigned int *rates, 1824 unsigned int *rate_min, 1825 unsigned int *rate_max) 1826 { 1827 struct snd_soc_pcm_runtime *fe = substream->private_data; 1828 struct snd_soc_dpcm *dpcm; 1829 int stream = substream->stream; 1830 1831 if (!fe->dai_link->dpcm_merged_rate) 1832 return; 1833 1834 /* 1835 * It returns merged BE codec channel; 1836 * if FE want to use it (= dpcm_merged_chan) 1837 */ 1838 1839 for_each_dpcm_be(fe, stream, dpcm) { 1840 struct snd_soc_pcm_runtime *be = dpcm->be; 1841 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver; 1842 struct snd_soc_dai_driver *codec_dai_drv; 1843 struct snd_soc_pcm_stream *codec_stream; 1844 struct snd_soc_pcm_stream *cpu_stream; 1845 struct snd_soc_dai *dai; 1846 int i; 1847 1848 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1849 cpu_stream = &cpu_dai_drv->playback; 1850 else 1851 cpu_stream = &cpu_dai_drv->capture; 1852 1853 *rate_min = max(*rate_min, cpu_stream->rate_min); 1854 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max); 1855 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates); 1856 1857 for_each_rtd_codec_dai(be, i, dai) { 1858 /* 1859 * Skip CODECs which don't support the current stream 1860 * type. See soc_pcm_init_runtime_hw() for more details 1861 */ 1862 if (!snd_soc_dai_stream_valid(dai, stream)) 1863 continue; 1864 1865 codec_dai_drv = dai->driver; 1866 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1867 codec_stream = &codec_dai_drv->playback; 1868 else 1869 codec_stream = &codec_dai_drv->capture; 1870 1871 *rate_min = max(*rate_min, codec_stream->rate_min); 1872 *rate_max = min_not_zero(*rate_max, 1873 codec_stream->rate_max); 1874 *rates = snd_pcm_rate_mask_intersect(*rates, 1875 codec_stream->rates); 1876 } 1877 } 1878 } 1879 1880 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1881 { 1882 struct snd_pcm_runtime *runtime = substream->runtime; 1883 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1884 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1885 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 1886 1887 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1888 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback); 1889 else 1890 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture); 1891 1892 dpcm_runtime_merge_format(substream, &runtime->hw.formats); 1893 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min, 1894 &runtime->hw.channels_max); 1895 dpcm_runtime_merge_rate(substream, &runtime->hw.rates, 1896 &runtime->hw.rate_min, &runtime->hw.rate_max); 1897 } 1898 1899 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 1900 1901 /* Set FE's runtime_update state; the state is protected via PCM stream lock 1902 * for avoiding the race with trigger callback. 1903 * If the state is unset and a trigger is pending while the previous operation, 1904 * process the pending trigger action here. 1905 */ 1906 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 1907 int stream, enum snd_soc_dpcm_update state) 1908 { 1909 struct snd_pcm_substream *substream = 1910 snd_soc_dpcm_get_substream(fe, stream); 1911 1912 snd_pcm_stream_lock_irq(substream); 1913 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 1914 dpcm_fe_dai_do_trigger(substream, 1915 fe->dpcm[stream].trigger_pending - 1); 1916 fe->dpcm[stream].trigger_pending = 0; 1917 } 1918 fe->dpcm[stream].runtime_update = state; 1919 snd_pcm_stream_unlock_irq(substream); 1920 } 1921 1922 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1923 int stream) 1924 { 1925 struct snd_soc_dpcm *dpcm; 1926 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1927 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai; 1928 int err; 1929 1930 /* apply symmetry for FE */ 1931 if (soc_pcm_has_symmetry(fe_substream)) 1932 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1933 1934 /* Symmetry only applies if we've got an active stream. */ 1935 if (fe_cpu_dai->active) { 1936 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1937 if (err < 0) 1938 return err; 1939 } 1940 1941 /* apply symmetry for BE */ 1942 for_each_dpcm_be(fe, stream, dpcm) { 1943 struct snd_soc_pcm_runtime *be = dpcm->be; 1944 struct snd_pcm_substream *be_substream = 1945 snd_soc_dpcm_get_substream(be, stream); 1946 struct snd_soc_pcm_runtime *rtd; 1947 struct snd_soc_dai *codec_dai; 1948 int i; 1949 1950 /* A backend may not have the requested substream */ 1951 if (!be_substream) 1952 continue; 1953 1954 rtd = be_substream->private_data; 1955 if (rtd->dai_link->be_hw_params_fixup) 1956 continue; 1957 1958 if (soc_pcm_has_symmetry(be_substream)) 1959 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1960 1961 /* Symmetry only applies if we've got an active stream. */ 1962 if (rtd->cpu_dai->active) { 1963 err = soc_pcm_apply_symmetry(fe_substream, 1964 rtd->cpu_dai); 1965 if (err < 0) 1966 return err; 1967 } 1968 1969 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1970 if (codec_dai->active) { 1971 err = soc_pcm_apply_symmetry(fe_substream, 1972 codec_dai); 1973 if (err < 0) 1974 return err; 1975 } 1976 } 1977 } 1978 1979 return 0; 1980 } 1981 1982 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1983 { 1984 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1985 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1986 int stream = fe_substream->stream, ret = 0; 1987 1988 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1989 1990 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1991 if (ret < 0) { 1992 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1993 goto be_err; 1994 } 1995 1996 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1997 1998 /* start the DAI frontend */ 1999 ret = soc_pcm_open(fe_substream); 2000 if (ret < 0) { 2001 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 2002 goto unwind; 2003 } 2004 2005 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 2006 2007 dpcm_set_fe_runtime(fe_substream); 2008 snd_pcm_limit_hw_rates(runtime); 2009 2010 ret = dpcm_apply_symmetry(fe_substream, stream); 2011 if (ret < 0) { 2012 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n", 2013 ret); 2014 goto unwind; 2015 } 2016 2017 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2018 return 0; 2019 2020 unwind: 2021 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 2022 be_err: 2023 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2024 return ret; 2025 } 2026 2027 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2028 { 2029 struct snd_soc_dpcm *dpcm; 2030 2031 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 2032 for_each_dpcm_be(fe, stream, dpcm) { 2033 2034 struct snd_soc_pcm_runtime *be = dpcm->be; 2035 struct snd_pcm_substream *be_substream = 2036 snd_soc_dpcm_get_substream(be, stream); 2037 2038 /* is this op for this BE ? */ 2039 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2040 continue; 2041 2042 if (be->dpcm[stream].users == 0) 2043 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 2044 stream ? "capture" : "playback", 2045 be->dpcm[stream].state); 2046 2047 if (--be->dpcm[stream].users != 0) 2048 continue; 2049 2050 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2051 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) { 2052 soc_pcm_hw_free(be_substream); 2053 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2054 } 2055 2056 dev_dbg(be->dev, "ASoC: close BE %s\n", 2057 be->dai_link->name); 2058 2059 soc_pcm_close(be_substream); 2060 be_substream->runtime = NULL; 2061 2062 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2063 } 2064 return 0; 2065 } 2066 2067 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 2068 { 2069 struct snd_soc_pcm_runtime *fe = substream->private_data; 2070 int stream = substream->stream; 2071 2072 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2073 2074 /* shutdown the BEs */ 2075 dpcm_be_dai_shutdown(fe, substream->stream); 2076 2077 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 2078 2079 /* now shutdown the frontend */ 2080 soc_pcm_close(substream); 2081 2082 /* run the stream event for each BE */ 2083 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 2084 2085 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2086 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2087 return 0; 2088 } 2089 2090 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 2091 { 2092 struct snd_soc_dpcm *dpcm; 2093 2094 /* only hw_params backends that are either sinks or sources 2095 * to this frontend DAI */ 2096 for_each_dpcm_be(fe, stream, dpcm) { 2097 2098 struct snd_soc_pcm_runtime *be = dpcm->be; 2099 struct snd_pcm_substream *be_substream = 2100 snd_soc_dpcm_get_substream(be, stream); 2101 2102 /* is this op for this BE ? */ 2103 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2104 continue; 2105 2106 /* only free hw when no longer used - check all FEs */ 2107 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2108 continue; 2109 2110 /* do not free hw if this BE is used by other FE */ 2111 if (be->dpcm[stream].users > 1) 2112 continue; 2113 2114 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2115 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2116 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2117 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2118 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2119 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2120 continue; 2121 2122 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2123 be->dai_link->name); 2124 2125 soc_pcm_hw_free(be_substream); 2126 2127 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2128 } 2129 2130 return 0; 2131 } 2132 2133 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2134 { 2135 struct snd_soc_pcm_runtime *fe = substream->private_data; 2136 int err, stream = substream->stream; 2137 2138 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2139 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2140 2141 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2142 2143 /* call hw_free on the frontend */ 2144 err = soc_pcm_hw_free(substream); 2145 if (err < 0) 2146 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 2147 fe->dai_link->name); 2148 2149 /* only hw_params backends that are either sinks or sources 2150 * to this frontend DAI */ 2151 err = dpcm_be_dai_hw_free(fe, stream); 2152 2153 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2154 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2155 2156 mutex_unlock(&fe->card->mutex); 2157 return 0; 2158 } 2159 2160 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2161 { 2162 struct snd_soc_dpcm *dpcm; 2163 int ret; 2164 2165 for_each_dpcm_be(fe, stream, dpcm) { 2166 2167 struct snd_soc_pcm_runtime *be = dpcm->be; 2168 struct snd_pcm_substream *be_substream = 2169 snd_soc_dpcm_get_substream(be, stream); 2170 2171 /* is this op for this BE ? */ 2172 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2173 continue; 2174 2175 /* copy params for each dpcm */ 2176 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 2177 sizeof(struct snd_pcm_hw_params)); 2178 2179 /* perform any hw_params fixups */ 2180 if (be->dai_link->be_hw_params_fixup) { 2181 ret = be->dai_link->be_hw_params_fixup(be, 2182 &dpcm->hw_params); 2183 if (ret < 0) { 2184 dev_err(be->dev, 2185 "ASoC: hw_params BE fixup failed %d\n", 2186 ret); 2187 goto unwind; 2188 } 2189 } 2190 2191 /* copy the fixed-up hw params for BE dai */ 2192 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 2193 sizeof(struct snd_pcm_hw_params)); 2194 2195 /* only allow hw_params() if no connected FEs are running */ 2196 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2197 continue; 2198 2199 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2200 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2201 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2202 continue; 2203 2204 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2205 be->dai_link->name); 2206 2207 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 2208 if (ret < 0) { 2209 dev_err(dpcm->be->dev, 2210 "ASoC: hw_params BE failed %d\n", ret); 2211 goto unwind; 2212 } 2213 2214 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2215 } 2216 return 0; 2217 2218 unwind: 2219 /* disable any enabled and non active backends */ 2220 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2221 struct snd_soc_pcm_runtime *be = dpcm->be; 2222 struct snd_pcm_substream *be_substream = 2223 snd_soc_dpcm_get_substream(be, stream); 2224 2225 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2226 continue; 2227 2228 /* only allow hw_free() if no connected FEs are running */ 2229 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2230 continue; 2231 2232 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2233 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2234 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2235 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2236 continue; 2237 2238 soc_pcm_hw_free(be_substream); 2239 } 2240 2241 return ret; 2242 } 2243 2244 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2245 struct snd_pcm_hw_params *params) 2246 { 2247 struct snd_soc_pcm_runtime *fe = substream->private_data; 2248 int ret, stream = substream->stream; 2249 2250 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2251 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2252 2253 memcpy(&fe->dpcm[substream->stream].hw_params, params, 2254 sizeof(struct snd_pcm_hw_params)); 2255 ret = dpcm_be_dai_hw_params(fe, substream->stream); 2256 if (ret < 0) { 2257 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 2258 goto out; 2259 } 2260 2261 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2262 fe->dai_link->name, params_rate(params), 2263 params_channels(params), params_format(params)); 2264 2265 /* call hw_params on the frontend */ 2266 ret = soc_pcm_hw_params(substream, params); 2267 if (ret < 0) { 2268 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 2269 dpcm_be_dai_hw_free(fe, stream); 2270 } else 2271 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2272 2273 out: 2274 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2275 mutex_unlock(&fe->card->mutex); 2276 return ret; 2277 } 2278 2279 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 2280 struct snd_pcm_substream *substream, int cmd) 2281 { 2282 int ret; 2283 2284 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 2285 dpcm->be->dai_link->name, cmd); 2286 2287 ret = soc_pcm_trigger(substream, cmd); 2288 if (ret < 0) 2289 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 2290 2291 return ret; 2292 } 2293 2294 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2295 int cmd) 2296 { 2297 struct snd_soc_dpcm *dpcm; 2298 int ret = 0; 2299 2300 for_each_dpcm_be(fe, stream, dpcm) { 2301 2302 struct snd_soc_pcm_runtime *be = dpcm->be; 2303 struct snd_pcm_substream *be_substream = 2304 snd_soc_dpcm_get_substream(be, stream); 2305 2306 /* is this op for this BE ? */ 2307 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2308 continue; 2309 2310 switch (cmd) { 2311 case SNDRV_PCM_TRIGGER_START: 2312 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2313 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2314 continue; 2315 2316 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2317 if (ret) 2318 return ret; 2319 2320 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2321 break; 2322 case SNDRV_PCM_TRIGGER_RESUME: 2323 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2324 continue; 2325 2326 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2327 if (ret) 2328 return ret; 2329 2330 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2331 break; 2332 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2333 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2334 continue; 2335 2336 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2337 if (ret) 2338 return ret; 2339 2340 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2341 break; 2342 case SNDRV_PCM_TRIGGER_STOP: 2343 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2344 continue; 2345 2346 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2347 continue; 2348 2349 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2350 if (ret) 2351 return ret; 2352 2353 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2354 break; 2355 case SNDRV_PCM_TRIGGER_SUSPEND: 2356 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2357 continue; 2358 2359 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2360 continue; 2361 2362 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2363 if (ret) 2364 return ret; 2365 2366 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2367 break; 2368 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2369 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2370 continue; 2371 2372 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2373 continue; 2374 2375 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2376 if (ret) 2377 return ret; 2378 2379 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2380 break; 2381 } 2382 } 2383 2384 return ret; 2385 } 2386 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2387 2388 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2389 { 2390 struct snd_soc_pcm_runtime *fe = substream->private_data; 2391 int stream = substream->stream, ret; 2392 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2393 2394 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2395 2396 switch (trigger) { 2397 case SND_SOC_DPCM_TRIGGER_PRE: 2398 /* call trigger on the frontend before the backend. */ 2399 2400 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2401 fe->dai_link->name, cmd); 2402 2403 ret = soc_pcm_trigger(substream, cmd); 2404 if (ret < 0) { 2405 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2406 goto out; 2407 } 2408 2409 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2410 break; 2411 case SND_SOC_DPCM_TRIGGER_POST: 2412 /* call trigger on the frontend after the backend. */ 2413 2414 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2415 if (ret < 0) { 2416 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2417 goto out; 2418 } 2419 2420 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2421 fe->dai_link->name, cmd); 2422 2423 ret = soc_pcm_trigger(substream, cmd); 2424 break; 2425 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2426 /* bespoke trigger() - handles both FE and BEs */ 2427 2428 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2429 fe->dai_link->name, cmd); 2430 2431 ret = soc_pcm_bespoke_trigger(substream, cmd); 2432 if (ret < 0) { 2433 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2434 goto out; 2435 } 2436 break; 2437 default: 2438 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2439 fe->dai_link->name); 2440 ret = -EINVAL; 2441 goto out; 2442 } 2443 2444 switch (cmd) { 2445 case SNDRV_PCM_TRIGGER_START: 2446 case SNDRV_PCM_TRIGGER_RESUME: 2447 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2448 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2449 break; 2450 case SNDRV_PCM_TRIGGER_STOP: 2451 case SNDRV_PCM_TRIGGER_SUSPEND: 2452 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2453 break; 2454 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2455 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2456 break; 2457 } 2458 2459 out: 2460 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2461 return ret; 2462 } 2463 2464 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2465 { 2466 struct snd_soc_pcm_runtime *fe = substream->private_data; 2467 int stream = substream->stream; 2468 2469 /* if FE's runtime_update is already set, we're in race; 2470 * process this trigger later at exit 2471 */ 2472 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2473 fe->dpcm[stream].trigger_pending = cmd + 1; 2474 return 0; /* delayed, assuming it's successful */ 2475 } 2476 2477 /* we're alone, let's trigger */ 2478 return dpcm_fe_dai_do_trigger(substream, cmd); 2479 } 2480 2481 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2482 { 2483 struct snd_soc_dpcm *dpcm; 2484 int ret = 0; 2485 2486 for_each_dpcm_be(fe, stream, dpcm) { 2487 2488 struct snd_soc_pcm_runtime *be = dpcm->be; 2489 struct snd_pcm_substream *be_substream = 2490 snd_soc_dpcm_get_substream(be, stream); 2491 2492 /* is this op for this BE ? */ 2493 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2494 continue; 2495 2496 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2497 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2498 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2499 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2500 continue; 2501 2502 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2503 be->dai_link->name); 2504 2505 ret = soc_pcm_prepare(be_substream); 2506 if (ret < 0) { 2507 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2508 ret); 2509 break; 2510 } 2511 2512 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2513 } 2514 return ret; 2515 } 2516 2517 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2518 { 2519 struct snd_soc_pcm_runtime *fe = substream->private_data; 2520 int stream = substream->stream, ret = 0; 2521 2522 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2523 2524 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2525 2526 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2527 2528 /* there is no point preparing this FE if there are no BEs */ 2529 if (list_empty(&fe->dpcm[stream].be_clients)) { 2530 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2531 fe->dai_link->name); 2532 ret = -EINVAL; 2533 goto out; 2534 } 2535 2536 ret = dpcm_be_dai_prepare(fe, substream->stream); 2537 if (ret < 0) 2538 goto out; 2539 2540 /* call prepare on the frontend */ 2541 ret = soc_pcm_prepare(substream); 2542 if (ret < 0) { 2543 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2544 fe->dai_link->name); 2545 goto out; 2546 } 2547 2548 /* run the stream event for each BE */ 2549 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2550 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2551 2552 out: 2553 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2554 mutex_unlock(&fe->card->mutex); 2555 2556 return ret; 2557 } 2558 2559 static int soc_pcm_ioctl(struct snd_pcm_substream *substream, 2560 unsigned int cmd, void *arg) 2561 { 2562 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2563 struct snd_soc_component *component; 2564 struct snd_soc_rtdcom_list *rtdcom; 2565 2566 for_each_rtdcom(rtd, rtdcom) { 2567 component = rtdcom->component; 2568 2569 if (!component->driver->ops || 2570 !component->driver->ops->ioctl) 2571 continue; 2572 2573 /* FIXME: use 1st ioctl */ 2574 return component->driver->ops->ioctl(substream, cmd, arg); 2575 } 2576 2577 return snd_pcm_lib_ioctl(substream, cmd, arg); 2578 } 2579 2580 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2581 { 2582 struct snd_pcm_substream *substream = 2583 snd_soc_dpcm_get_substream(fe, stream); 2584 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2585 int err; 2586 2587 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2588 stream ? "capture" : "playback", fe->dai_link->name); 2589 2590 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2591 /* call bespoke trigger - FE takes care of all BE triggers */ 2592 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2593 fe->dai_link->name); 2594 2595 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2596 if (err < 0) 2597 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2598 } else { 2599 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2600 fe->dai_link->name); 2601 2602 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2603 if (err < 0) 2604 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2605 } 2606 2607 err = dpcm_be_dai_hw_free(fe, stream); 2608 if (err < 0) 2609 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2610 2611 err = dpcm_be_dai_shutdown(fe, stream); 2612 if (err < 0) 2613 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2614 2615 /* run the stream event for each BE */ 2616 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2617 2618 return 0; 2619 } 2620 2621 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2622 { 2623 struct snd_pcm_substream *substream = 2624 snd_soc_dpcm_get_substream(fe, stream); 2625 struct snd_soc_dpcm *dpcm; 2626 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2627 int ret; 2628 unsigned long flags; 2629 2630 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2631 stream ? "capture" : "playback", fe->dai_link->name); 2632 2633 /* Only start the BE if the FE is ready */ 2634 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2635 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2636 return -EINVAL; 2637 2638 /* startup must always be called for new BEs */ 2639 ret = dpcm_be_dai_startup(fe, stream); 2640 if (ret < 0) 2641 goto disconnect; 2642 2643 /* keep going if FE state is > open */ 2644 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2645 return 0; 2646 2647 ret = dpcm_be_dai_hw_params(fe, stream); 2648 if (ret < 0) 2649 goto close; 2650 2651 /* keep going if FE state is > hw_params */ 2652 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2653 return 0; 2654 2655 2656 ret = dpcm_be_dai_prepare(fe, stream); 2657 if (ret < 0) 2658 goto hw_free; 2659 2660 /* run the stream event for each BE */ 2661 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2662 2663 /* keep going if FE state is > prepare */ 2664 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2665 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2666 return 0; 2667 2668 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2669 /* call trigger on the frontend - FE takes care of all BE triggers */ 2670 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2671 fe->dai_link->name); 2672 2673 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2674 if (ret < 0) { 2675 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2676 goto hw_free; 2677 } 2678 } else { 2679 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2680 fe->dai_link->name); 2681 2682 ret = dpcm_be_dai_trigger(fe, stream, 2683 SNDRV_PCM_TRIGGER_START); 2684 if (ret < 0) { 2685 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2686 goto hw_free; 2687 } 2688 } 2689 2690 return 0; 2691 2692 hw_free: 2693 dpcm_be_dai_hw_free(fe, stream); 2694 close: 2695 dpcm_be_dai_shutdown(fe, stream); 2696 disconnect: 2697 /* disconnect any non started BEs */ 2698 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2699 for_each_dpcm_be(fe, stream, dpcm) { 2700 struct snd_soc_pcm_runtime *be = dpcm->be; 2701 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2702 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2703 } 2704 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2705 2706 return ret; 2707 } 2708 2709 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2710 { 2711 int ret; 2712 2713 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2714 ret = dpcm_run_update_startup(fe, stream); 2715 if (ret < 0) 2716 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2717 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2718 2719 return ret; 2720 } 2721 2722 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2723 { 2724 int ret; 2725 2726 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2727 ret = dpcm_run_update_shutdown(fe, stream); 2728 if (ret < 0) 2729 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2730 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2731 2732 return ret; 2733 } 2734 2735 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2736 { 2737 struct snd_soc_dapm_widget_list *list; 2738 int count, paths; 2739 2740 if (!fe->dai_link->dynamic) 2741 return 0; 2742 2743 /* only check active links */ 2744 if (!fe->cpu_dai->active) 2745 return 0; 2746 2747 /* DAPM sync will call this to update DSP paths */ 2748 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2749 new ? "new" : "old", fe->dai_link->name); 2750 2751 /* skip if FE doesn't have playback capability */ 2752 if (!fe->cpu_dai->driver->playback.channels_min || 2753 !fe->codec_dai->driver->playback.channels_min) 2754 goto capture; 2755 2756 /* skip if FE isn't currently playing */ 2757 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active) 2758 goto capture; 2759 2760 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2761 if (paths < 0) { 2762 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2763 fe->dai_link->name, "playback"); 2764 return paths; 2765 } 2766 2767 /* update any playback paths */ 2768 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new); 2769 if (count) { 2770 if (new) 2771 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2772 else 2773 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2774 2775 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2776 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2777 } 2778 2779 dpcm_path_put(&list); 2780 2781 capture: 2782 /* skip if FE doesn't have capture capability */ 2783 if (!fe->cpu_dai->driver->capture.channels_min || 2784 !fe->codec_dai->driver->capture.channels_min) 2785 return 0; 2786 2787 /* skip if FE isn't currently capturing */ 2788 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active) 2789 return 0; 2790 2791 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2792 if (paths < 0) { 2793 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2794 fe->dai_link->name, "capture"); 2795 return paths; 2796 } 2797 2798 /* update any old capture paths */ 2799 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new); 2800 if (count) { 2801 if (new) 2802 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2803 else 2804 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2805 2806 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2807 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2808 } 2809 2810 dpcm_path_put(&list); 2811 2812 return 0; 2813 } 2814 2815 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2816 * any DAI links. 2817 */ 2818 int soc_dpcm_runtime_update(struct snd_soc_card *card) 2819 { 2820 struct snd_soc_pcm_runtime *fe; 2821 int ret = 0; 2822 2823 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2824 /* shutdown all old paths first */ 2825 for_each_card_rtds(card, fe) { 2826 ret = soc_dpcm_fe_runtime_update(fe, 0); 2827 if (ret) 2828 goto out; 2829 } 2830 2831 /* bring new paths up */ 2832 for_each_card_rtds(card, fe) { 2833 ret = soc_dpcm_fe_runtime_update(fe, 1); 2834 if (ret) 2835 goto out; 2836 } 2837 2838 out: 2839 mutex_unlock(&card->mutex); 2840 return ret; 2841 } 2842 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2843 { 2844 struct snd_soc_dpcm *dpcm; 2845 struct snd_soc_dai *dai; 2846 2847 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) { 2848 2849 struct snd_soc_pcm_runtime *be = dpcm->be; 2850 int i; 2851 2852 if (be->dai_link->ignore_suspend) 2853 continue; 2854 2855 for_each_rtd_codec_dai(be, i, dai) { 2856 struct snd_soc_dai_driver *drv = dai->driver; 2857 2858 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2859 be->dai_link->name); 2860 2861 if (drv->ops && drv->ops->digital_mute && 2862 dai->playback_active) 2863 drv->ops->digital_mute(dai, mute); 2864 } 2865 } 2866 2867 return 0; 2868 } 2869 2870 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2871 { 2872 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2873 struct snd_soc_dpcm *dpcm; 2874 struct snd_soc_dapm_widget_list *list; 2875 int ret; 2876 int stream = fe_substream->stream; 2877 2878 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2879 fe->dpcm[stream].runtime = fe_substream->runtime; 2880 2881 ret = dpcm_path_get(fe, stream, &list); 2882 if (ret < 0) { 2883 mutex_unlock(&fe->card->mutex); 2884 return ret; 2885 } else if (ret == 0) { 2886 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2887 fe->dai_link->name, stream ? "capture" : "playback"); 2888 } 2889 2890 /* calculate valid and active FE <-> BE dpcms */ 2891 dpcm_process_paths(fe, stream, &list, 1); 2892 2893 ret = dpcm_fe_dai_startup(fe_substream); 2894 if (ret < 0) { 2895 /* clean up all links */ 2896 for_each_dpcm_be(fe, stream, dpcm) 2897 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2898 2899 dpcm_be_disconnect(fe, stream); 2900 fe->dpcm[stream].runtime = NULL; 2901 } 2902 2903 dpcm_clear_pending_state(fe, stream); 2904 dpcm_path_put(&list); 2905 mutex_unlock(&fe->card->mutex); 2906 return ret; 2907 } 2908 2909 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2910 { 2911 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2912 struct snd_soc_dpcm *dpcm; 2913 int stream = fe_substream->stream, ret; 2914 2915 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2916 ret = dpcm_fe_dai_shutdown(fe_substream); 2917 2918 /* mark FE's links ready to prune */ 2919 for_each_dpcm_be(fe, stream, dpcm) 2920 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2921 2922 dpcm_be_disconnect(fe, stream); 2923 2924 fe->dpcm[stream].runtime = NULL; 2925 mutex_unlock(&fe->card->mutex); 2926 return ret; 2927 } 2928 2929 static void soc_pcm_private_free(struct snd_pcm *pcm) 2930 { 2931 struct snd_soc_pcm_runtime *rtd = pcm->private_data; 2932 struct snd_soc_rtdcom_list *rtdcom; 2933 struct snd_soc_component *component; 2934 2935 /* need to sync the delayed work before releasing resources */ 2936 flush_delayed_work(&rtd->delayed_work); 2937 for_each_rtdcom(rtd, rtdcom) { 2938 component = rtdcom->component; 2939 2940 if (component->driver->pcm_free) 2941 component->driver->pcm_free(pcm); 2942 } 2943 } 2944 2945 static int soc_rtdcom_ack(struct snd_pcm_substream *substream) 2946 { 2947 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2948 struct snd_soc_rtdcom_list *rtdcom; 2949 struct snd_soc_component *component; 2950 2951 for_each_rtdcom(rtd, rtdcom) { 2952 component = rtdcom->component; 2953 2954 if (!component->driver->ops || 2955 !component->driver->ops->ack) 2956 continue; 2957 2958 /* FIXME. it returns 1st ask now */ 2959 return component->driver->ops->ack(substream); 2960 } 2961 2962 return -EINVAL; 2963 } 2964 2965 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel, 2966 unsigned long pos, void __user *buf, 2967 unsigned long bytes) 2968 { 2969 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2970 struct snd_soc_rtdcom_list *rtdcom; 2971 struct snd_soc_component *component; 2972 2973 for_each_rtdcom(rtd, rtdcom) { 2974 component = rtdcom->component; 2975 2976 if (!component->driver->ops || 2977 !component->driver->ops->copy_user) 2978 continue; 2979 2980 /* FIXME. it returns 1st copy now */ 2981 return component->driver->ops->copy_user(substream, channel, 2982 pos, buf, bytes); 2983 } 2984 2985 return -EINVAL; 2986 } 2987 2988 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel, 2989 unsigned long pos, void *buf, unsigned long bytes) 2990 { 2991 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2992 struct snd_soc_rtdcom_list *rtdcom; 2993 struct snd_soc_component *component; 2994 2995 for_each_rtdcom(rtd, rtdcom) { 2996 component = rtdcom->component; 2997 2998 if (!component->driver->ops || 2999 !component->driver->ops->copy_kernel) 3000 continue; 3001 3002 /* FIXME. it returns 1st copy now */ 3003 return component->driver->ops->copy_kernel(substream, channel, 3004 pos, buf, bytes); 3005 } 3006 3007 return -EINVAL; 3008 } 3009 3010 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel, 3011 unsigned long pos, unsigned long bytes) 3012 { 3013 struct snd_soc_pcm_runtime *rtd = substream->private_data; 3014 struct snd_soc_rtdcom_list *rtdcom; 3015 struct snd_soc_component *component; 3016 3017 for_each_rtdcom(rtd, rtdcom) { 3018 component = rtdcom->component; 3019 3020 if (!component->driver->ops || 3021 !component->driver->ops->fill_silence) 3022 continue; 3023 3024 /* FIXME. it returns 1st silence now */ 3025 return component->driver->ops->fill_silence(substream, channel, 3026 pos, bytes); 3027 } 3028 3029 return -EINVAL; 3030 } 3031 3032 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream, 3033 unsigned long offset) 3034 { 3035 struct snd_soc_pcm_runtime *rtd = substream->private_data; 3036 struct snd_soc_rtdcom_list *rtdcom; 3037 struct snd_soc_component *component; 3038 struct page *page; 3039 3040 for_each_rtdcom(rtd, rtdcom) { 3041 component = rtdcom->component; 3042 3043 if (!component->driver->ops || 3044 !component->driver->ops->page) 3045 continue; 3046 3047 /* FIXME. it returns 1st page now */ 3048 page = component->driver->ops->page(substream, offset); 3049 if (page) 3050 return page; 3051 } 3052 3053 return NULL; 3054 } 3055 3056 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream, 3057 struct vm_area_struct *vma) 3058 { 3059 struct snd_soc_pcm_runtime *rtd = substream->private_data; 3060 struct snd_soc_rtdcom_list *rtdcom; 3061 struct snd_soc_component *component; 3062 3063 for_each_rtdcom(rtd, rtdcom) { 3064 component = rtdcom->component; 3065 3066 if (!component->driver->ops || 3067 !component->driver->ops->mmap) 3068 continue; 3069 3070 /* FIXME. it returns 1st mmap now */ 3071 return component->driver->ops->mmap(substream, vma); 3072 } 3073 3074 return -EINVAL; 3075 } 3076 3077 /* create a new pcm */ 3078 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 3079 { 3080 struct snd_soc_dai *codec_dai; 3081 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 3082 struct snd_soc_component *component; 3083 struct snd_soc_rtdcom_list *rtdcom; 3084 struct snd_pcm *pcm; 3085 char new_name[64]; 3086 int ret = 0, playback = 0, capture = 0; 3087 int i; 3088 3089 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 3090 playback = rtd->dai_link->dpcm_playback; 3091 capture = rtd->dai_link->dpcm_capture; 3092 } else { 3093 for_each_rtd_codec_dai(rtd, i, codec_dai) { 3094 if (codec_dai->driver->playback.channels_min) 3095 playback = 1; 3096 if (codec_dai->driver->capture.channels_min) 3097 capture = 1; 3098 } 3099 3100 capture = capture && cpu_dai->driver->capture.channels_min; 3101 playback = playback && cpu_dai->driver->playback.channels_min; 3102 } 3103 3104 if (rtd->dai_link->playback_only) { 3105 playback = 1; 3106 capture = 0; 3107 } 3108 3109 if (rtd->dai_link->capture_only) { 3110 playback = 0; 3111 capture = 1; 3112 } 3113 3114 /* create the PCM */ 3115 if (rtd->dai_link->no_pcm) { 3116 snprintf(new_name, sizeof(new_name), "(%s)", 3117 rtd->dai_link->stream_name); 3118 3119 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 3120 playback, capture, &pcm); 3121 } else { 3122 if (rtd->dai_link->dynamic) 3123 snprintf(new_name, sizeof(new_name), "%s (*)", 3124 rtd->dai_link->stream_name); 3125 else 3126 snprintf(new_name, sizeof(new_name), "%s %s-%d", 3127 rtd->dai_link->stream_name, 3128 (rtd->num_codecs > 1) ? 3129 "multicodec" : rtd->codec_dai->name, num); 3130 3131 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 3132 capture, &pcm); 3133 } 3134 if (ret < 0) { 3135 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 3136 rtd->dai_link->name); 3137 return ret; 3138 } 3139 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 3140 3141 /* DAPM dai link stream work */ 3142 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 3143 3144 pcm->nonatomic = rtd->dai_link->nonatomic; 3145 rtd->pcm = pcm; 3146 pcm->private_data = rtd; 3147 3148 if (rtd->dai_link->no_pcm) { 3149 if (playback) 3150 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 3151 if (capture) 3152 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 3153 goto out; 3154 } 3155 3156 /* ASoC PCM operations */ 3157 if (rtd->dai_link->dynamic) { 3158 rtd->ops.open = dpcm_fe_dai_open; 3159 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 3160 rtd->ops.prepare = dpcm_fe_dai_prepare; 3161 rtd->ops.trigger = dpcm_fe_dai_trigger; 3162 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 3163 rtd->ops.close = dpcm_fe_dai_close; 3164 rtd->ops.pointer = soc_pcm_pointer; 3165 rtd->ops.ioctl = soc_pcm_ioctl; 3166 } else { 3167 rtd->ops.open = soc_pcm_open; 3168 rtd->ops.hw_params = soc_pcm_hw_params; 3169 rtd->ops.prepare = soc_pcm_prepare; 3170 rtd->ops.trigger = soc_pcm_trigger; 3171 rtd->ops.hw_free = soc_pcm_hw_free; 3172 rtd->ops.close = soc_pcm_close; 3173 rtd->ops.pointer = soc_pcm_pointer; 3174 rtd->ops.ioctl = soc_pcm_ioctl; 3175 } 3176 3177 for_each_rtdcom(rtd, rtdcom) { 3178 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops; 3179 3180 if (!ops) 3181 continue; 3182 3183 if (ops->ack) 3184 rtd->ops.ack = soc_rtdcom_ack; 3185 if (ops->copy_user) 3186 rtd->ops.copy_user = soc_rtdcom_copy_user; 3187 if (ops->copy_kernel) 3188 rtd->ops.copy_kernel = soc_rtdcom_copy_kernel; 3189 if (ops->fill_silence) 3190 rtd->ops.fill_silence = soc_rtdcom_fill_silence; 3191 if (ops->page) 3192 rtd->ops.page = soc_rtdcom_page; 3193 if (ops->mmap) 3194 rtd->ops.mmap = soc_rtdcom_mmap; 3195 } 3196 3197 if (playback) 3198 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 3199 3200 if (capture) 3201 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 3202 3203 for_each_rtdcom(rtd, rtdcom) { 3204 component = rtdcom->component; 3205 3206 if (!component->driver->pcm_new) 3207 continue; 3208 3209 ret = component->driver->pcm_new(rtd); 3210 if (ret < 0) { 3211 dev_err(component->dev, 3212 "ASoC: pcm constructor failed: %d\n", 3213 ret); 3214 return ret; 3215 } 3216 } 3217 3218 pcm->private_free = soc_pcm_private_free; 3219 pcm->no_device_suspend = true; 3220 out: 3221 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 3222 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 3223 cpu_dai->name); 3224 return ret; 3225 } 3226 3227 /* is the current PCM operation for this FE ? */ 3228 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 3229 { 3230 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 3231 return 1; 3232 return 0; 3233 } 3234 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 3235 3236 /* is the current PCM operation for this BE ? */ 3237 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 3238 struct snd_soc_pcm_runtime *be, int stream) 3239 { 3240 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 3241 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 3242 be->dpcm[stream].runtime_update)) 3243 return 1; 3244 return 0; 3245 } 3246 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 3247 3248 /* get the substream for this BE */ 3249 struct snd_pcm_substream * 3250 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3251 { 3252 return be->pcm->streams[stream].substream; 3253 } 3254 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3255 3256 /* get the BE runtime state */ 3257 enum snd_soc_dpcm_state 3258 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 3259 { 3260 return be->dpcm[stream].state; 3261 } 3262 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 3263 3264 /* set the BE runtime state */ 3265 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 3266 int stream, enum snd_soc_dpcm_state state) 3267 { 3268 be->dpcm[stream].state = state; 3269 } 3270 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 3271 3272 /* 3273 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3274 * are not running, paused or suspended for the specified stream direction. 3275 */ 3276 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3277 struct snd_soc_pcm_runtime *be, int stream) 3278 { 3279 struct snd_soc_dpcm *dpcm; 3280 int state; 3281 int ret = 1; 3282 unsigned long flags; 3283 3284 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3285 for_each_dpcm_fe(be, stream, dpcm) { 3286 3287 if (dpcm->fe == fe) 3288 continue; 3289 3290 state = dpcm->fe->dpcm[stream].state; 3291 if (state == SND_SOC_DPCM_STATE_START || 3292 state == SND_SOC_DPCM_STATE_PAUSED || 3293 state == SND_SOC_DPCM_STATE_SUSPEND) { 3294 ret = 0; 3295 break; 3296 } 3297 } 3298 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3299 3300 /* it's safe to free/stop this BE DAI */ 3301 return ret; 3302 } 3303 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3304 3305 /* 3306 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3307 * running, paused or suspended for the specified stream direction. 3308 */ 3309 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3310 struct snd_soc_pcm_runtime *be, int stream) 3311 { 3312 struct snd_soc_dpcm *dpcm; 3313 int state; 3314 int ret = 1; 3315 unsigned long flags; 3316 3317 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3318 for_each_dpcm_fe(be, stream, dpcm) { 3319 3320 if (dpcm->fe == fe) 3321 continue; 3322 3323 state = dpcm->fe->dpcm[stream].state; 3324 if (state == SND_SOC_DPCM_STATE_START || 3325 state == SND_SOC_DPCM_STATE_PAUSED || 3326 state == SND_SOC_DPCM_STATE_SUSPEND || 3327 state == SND_SOC_DPCM_STATE_PREPARE) { 3328 ret = 0; 3329 break; 3330 } 3331 } 3332 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3333 3334 /* it's safe to change hw_params */ 3335 return ret; 3336 } 3337 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3338 3339 #ifdef CONFIG_DEBUG_FS 3340 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 3341 { 3342 switch (state) { 3343 case SND_SOC_DPCM_STATE_NEW: 3344 return "new"; 3345 case SND_SOC_DPCM_STATE_OPEN: 3346 return "open"; 3347 case SND_SOC_DPCM_STATE_HW_PARAMS: 3348 return "hw_params"; 3349 case SND_SOC_DPCM_STATE_PREPARE: 3350 return "prepare"; 3351 case SND_SOC_DPCM_STATE_START: 3352 return "start"; 3353 case SND_SOC_DPCM_STATE_STOP: 3354 return "stop"; 3355 case SND_SOC_DPCM_STATE_SUSPEND: 3356 return "suspend"; 3357 case SND_SOC_DPCM_STATE_PAUSED: 3358 return "paused"; 3359 case SND_SOC_DPCM_STATE_HW_FREE: 3360 return "hw_free"; 3361 case SND_SOC_DPCM_STATE_CLOSE: 3362 return "close"; 3363 } 3364 3365 return "unknown"; 3366 } 3367 3368 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 3369 int stream, char *buf, size_t size) 3370 { 3371 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 3372 struct snd_soc_dpcm *dpcm; 3373 ssize_t offset = 0; 3374 unsigned long flags; 3375 3376 /* FE state */ 3377 offset += snprintf(buf + offset, size - offset, 3378 "[%s - %s]\n", fe->dai_link->name, 3379 stream ? "Capture" : "Playback"); 3380 3381 offset += snprintf(buf + offset, size - offset, "State: %s\n", 3382 dpcm_state_string(fe->dpcm[stream].state)); 3383 3384 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3385 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3386 offset += snprintf(buf + offset, size - offset, 3387 "Hardware Params: " 3388 "Format = %s, Channels = %d, Rate = %d\n", 3389 snd_pcm_format_name(params_format(params)), 3390 params_channels(params), 3391 params_rate(params)); 3392 3393 /* BEs state */ 3394 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 3395 3396 if (list_empty(&fe->dpcm[stream].be_clients)) { 3397 offset += snprintf(buf + offset, size - offset, 3398 " No active DSP links\n"); 3399 goto out; 3400 } 3401 3402 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3403 for_each_dpcm_be(fe, stream, dpcm) { 3404 struct snd_soc_pcm_runtime *be = dpcm->be; 3405 params = &dpcm->hw_params; 3406 3407 offset += snprintf(buf + offset, size - offset, 3408 "- %s\n", be->dai_link->name); 3409 3410 offset += snprintf(buf + offset, size - offset, 3411 " State: %s\n", 3412 dpcm_state_string(be->dpcm[stream].state)); 3413 3414 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3415 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3416 offset += snprintf(buf + offset, size - offset, 3417 " Hardware Params: " 3418 "Format = %s, Channels = %d, Rate = %d\n", 3419 snd_pcm_format_name(params_format(params)), 3420 params_channels(params), 3421 params_rate(params)); 3422 } 3423 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3424 out: 3425 return offset; 3426 } 3427 3428 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 3429 size_t count, loff_t *ppos) 3430 { 3431 struct snd_soc_pcm_runtime *fe = file->private_data; 3432 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 3433 char *buf; 3434 3435 buf = kmalloc(out_count, GFP_KERNEL); 3436 if (!buf) 3437 return -ENOMEM; 3438 3439 if (fe->cpu_dai->driver->playback.channels_min) 3440 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 3441 buf + offset, out_count - offset); 3442 3443 if (fe->cpu_dai->driver->capture.channels_min) 3444 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 3445 buf + offset, out_count - offset); 3446 3447 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 3448 3449 kfree(buf); 3450 return ret; 3451 } 3452 3453 static const struct file_operations dpcm_state_fops = { 3454 .open = simple_open, 3455 .read = dpcm_state_read_file, 3456 .llseek = default_llseek, 3457 }; 3458 3459 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 3460 { 3461 if (!rtd->dai_link) 3462 return; 3463 3464 if (!rtd->card->debugfs_card_root) 3465 return; 3466 3467 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 3468 rtd->card->debugfs_card_root); 3469 if (!rtd->debugfs_dpcm_root) { 3470 dev_dbg(rtd->dev, 3471 "ASoC: Failed to create dpcm debugfs directory %s\n", 3472 rtd->dai_link->name); 3473 return; 3474 } 3475 3476 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 3477 rtd, &dpcm_state_fops); 3478 } 3479 #endif 3480