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/slab.h> 19 #include <linux/workqueue.h> 20 #include <linux/export.h> 21 #include <linux/debugfs.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/soc-dpcm.h> 27 #include <sound/initval.h> 28 29 #define DPCM_MAX_BE_USERS 8 30 31 /** 32 * snd_soc_runtime_activate() - Increment active count for PCM runtime components 33 * @rtd: ASoC PCM runtime that is activated 34 * @stream: Direction of the PCM stream 35 * 36 * Increments the active count for all the DAIs and components attached to a PCM 37 * runtime. Should typically be called when a stream is opened. 38 * 39 * Must be called with the rtd->card->pcm_mutex being held 40 */ 41 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream) 42 { 43 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 44 struct snd_soc_dai *codec_dai; 45 int i; 46 47 lockdep_assert_held(&rtd->card->pcm_mutex); 48 49 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 50 cpu_dai->playback_active++; 51 for_each_rtd_codec_dai(rtd, i, codec_dai) 52 codec_dai->playback_active++; 53 } else { 54 cpu_dai->capture_active++; 55 for_each_rtd_codec_dai(rtd, i, codec_dai) 56 codec_dai->capture_active++; 57 } 58 59 cpu_dai->active++; 60 cpu_dai->component->active++; 61 for_each_rtd_codec_dai(rtd, i, codec_dai) { 62 codec_dai->active++; 63 codec_dai->component->active++; 64 } 65 } 66 67 /** 68 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components 69 * @rtd: ASoC PCM runtime that is deactivated 70 * @stream: Direction of the PCM stream 71 * 72 * Decrements the active count for all the DAIs and components attached to a PCM 73 * runtime. Should typically be called when a stream is closed. 74 * 75 * Must be called with the rtd->card->pcm_mutex being held 76 */ 77 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream) 78 { 79 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 80 struct snd_soc_dai *codec_dai; 81 int i; 82 83 lockdep_assert_held(&rtd->card->pcm_mutex); 84 85 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 86 cpu_dai->playback_active--; 87 for_each_rtd_codec_dai(rtd, i, codec_dai) 88 codec_dai->playback_active--; 89 } else { 90 cpu_dai->capture_active--; 91 for_each_rtd_codec_dai(rtd, i, codec_dai) 92 codec_dai->capture_active--; 93 } 94 95 cpu_dai->active--; 96 cpu_dai->component->active--; 97 for_each_rtd_codec_dai(rtd, i, codec_dai) { 98 codec_dai->component->active--; 99 codec_dai->active--; 100 } 101 } 102 103 /** 104 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 105 * @rtd: The ASoC PCM runtime that should be checked. 106 * 107 * This function checks whether the power down delay should be ignored for a 108 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 109 * been configured to ignore the delay, or if none of the components benefits 110 * from having the delay. 111 */ 112 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 113 { 114 struct snd_soc_component *component; 115 bool ignore = true; 116 int i; 117 118 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 119 return true; 120 121 for_each_rtd_components(rtd, i, component) 122 ignore &= !component->driver->use_pmdown_time; 123 124 return ignore; 125 } 126 127 /** 128 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 129 * @substream: the pcm substream 130 * @hw: the hardware parameters 131 * 132 * Sets the substream runtime hardware parameters. 133 */ 134 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 135 const struct snd_pcm_hardware *hw) 136 { 137 struct snd_pcm_runtime *runtime = substream->runtime; 138 runtime->hw.info = hw->info; 139 runtime->hw.formats = hw->formats; 140 runtime->hw.period_bytes_min = hw->period_bytes_min; 141 runtime->hw.period_bytes_max = hw->period_bytes_max; 142 runtime->hw.periods_min = hw->periods_min; 143 runtime->hw.periods_max = hw->periods_max; 144 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; 145 runtime->hw.fifo_size = hw->fifo_size; 146 return 0; 147 } 148 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 149 150 /* DPCM stream event, send event to FE and all active BEs. */ 151 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 152 int event) 153 { 154 struct snd_soc_dpcm *dpcm; 155 156 for_each_dpcm_be(fe, dir, dpcm) { 157 158 struct snd_soc_pcm_runtime *be = dpcm->be; 159 160 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 161 be->dai_link->name, event, dir); 162 163 if ((event == SND_SOC_DAPM_STREAM_STOP) && 164 (be->dpcm[dir].users >= 1)) 165 continue; 166 167 snd_soc_dapm_stream_event(be, dir, event); 168 } 169 170 snd_soc_dapm_stream_event(fe, dir, event); 171 172 return 0; 173 } 174 175 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 176 struct snd_soc_dai *soc_dai) 177 { 178 struct snd_soc_pcm_runtime *rtd = substream->private_data; 179 int ret; 180 181 if (soc_dai->rate && (soc_dai->driver->symmetric_rates || 182 rtd->dai_link->symmetric_rates)) { 183 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", 184 soc_dai->rate); 185 186 ret = snd_pcm_hw_constraint_single(substream->runtime, 187 SNDRV_PCM_HW_PARAM_RATE, 188 soc_dai->rate); 189 if (ret < 0) { 190 dev_err(soc_dai->dev, 191 "ASoC: Unable to apply rate constraint: %d\n", 192 ret); 193 return ret; 194 } 195 } 196 197 if (soc_dai->channels && (soc_dai->driver->symmetric_channels || 198 rtd->dai_link->symmetric_channels)) { 199 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n", 200 soc_dai->channels); 201 202 ret = snd_pcm_hw_constraint_single(substream->runtime, 203 SNDRV_PCM_HW_PARAM_CHANNELS, 204 soc_dai->channels); 205 if (ret < 0) { 206 dev_err(soc_dai->dev, 207 "ASoC: Unable to apply channel symmetry constraint: %d\n", 208 ret); 209 return ret; 210 } 211 } 212 213 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits || 214 rtd->dai_link->symmetric_samplebits)) { 215 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n", 216 soc_dai->sample_bits); 217 218 ret = snd_pcm_hw_constraint_single(substream->runtime, 219 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 220 soc_dai->sample_bits); 221 if (ret < 0) { 222 dev_err(soc_dai->dev, 223 "ASoC: Unable to apply sample bits symmetry constraint: %d\n", 224 ret); 225 return ret; 226 } 227 } 228 229 return 0; 230 } 231 232 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 233 struct snd_pcm_hw_params *params) 234 { 235 struct snd_soc_pcm_runtime *rtd = substream->private_data; 236 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 237 struct snd_soc_dai *codec_dai; 238 unsigned int rate, channels, sample_bits, symmetry, i; 239 240 rate = params_rate(params); 241 channels = params_channels(params); 242 sample_bits = snd_pcm_format_physical_width(params_format(params)); 243 244 /* reject unmatched parameters when applying symmetry */ 245 symmetry = cpu_dai->driver->symmetric_rates || 246 rtd->dai_link->symmetric_rates; 247 248 for_each_rtd_codec_dai(rtd, i, codec_dai) 249 symmetry |= codec_dai->driver->symmetric_rates; 250 251 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) { 252 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n", 253 cpu_dai->rate, rate); 254 return -EINVAL; 255 } 256 257 symmetry = cpu_dai->driver->symmetric_channels || 258 rtd->dai_link->symmetric_channels; 259 260 for_each_rtd_codec_dai(rtd, i, codec_dai) 261 symmetry |= codec_dai->driver->symmetric_channels; 262 263 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) { 264 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n", 265 cpu_dai->channels, channels); 266 return -EINVAL; 267 } 268 269 symmetry = cpu_dai->driver->symmetric_samplebits || 270 rtd->dai_link->symmetric_samplebits; 271 272 for_each_rtd_codec_dai(rtd, i, codec_dai) 273 symmetry |= codec_dai->driver->symmetric_samplebits; 274 275 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) { 276 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n", 277 cpu_dai->sample_bits, sample_bits); 278 return -EINVAL; 279 } 280 281 return 0; 282 } 283 284 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream) 285 { 286 struct snd_soc_pcm_runtime *rtd = substream->private_data; 287 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver; 288 struct snd_soc_dai_link *link = rtd->dai_link; 289 struct snd_soc_dai *codec_dai; 290 unsigned int symmetry, i; 291 292 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates || 293 cpu_driver->symmetric_channels || link->symmetric_channels || 294 cpu_driver->symmetric_samplebits || link->symmetric_samplebits; 295 296 for_each_rtd_codec_dai(rtd, i, codec_dai) 297 symmetry = symmetry || 298 codec_dai->driver->symmetric_rates || 299 codec_dai->driver->symmetric_channels || 300 codec_dai->driver->symmetric_samplebits; 301 302 return symmetry; 303 } 304 305 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 306 { 307 struct snd_soc_pcm_runtime *rtd = substream->private_data; 308 int ret; 309 310 if (!bits) 311 return; 312 313 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 314 if (ret != 0) 315 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 316 bits, ret); 317 } 318 319 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 320 { 321 struct snd_soc_pcm_runtime *rtd = substream->private_data; 322 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 323 struct snd_soc_dai *codec_dai; 324 int i; 325 unsigned int bits = 0, cpu_bits; 326 327 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 328 for_each_rtd_codec_dai(rtd, i, codec_dai) { 329 if (codec_dai->driver->playback.sig_bits == 0) { 330 bits = 0; 331 break; 332 } 333 bits = max(codec_dai->driver->playback.sig_bits, bits); 334 } 335 cpu_bits = cpu_dai->driver->playback.sig_bits; 336 } else { 337 for_each_rtd_codec_dai(rtd, i, codec_dai) { 338 if (codec_dai->driver->capture.sig_bits == 0) { 339 bits = 0; 340 break; 341 } 342 bits = max(codec_dai->driver->capture.sig_bits, bits); 343 } 344 cpu_bits = cpu_dai->driver->capture.sig_bits; 345 } 346 347 soc_pcm_set_msb(substream, bits); 348 soc_pcm_set_msb(substream, cpu_bits); 349 } 350 351 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 352 { 353 struct snd_pcm_runtime *runtime = substream->runtime; 354 struct snd_pcm_hardware *hw = &runtime->hw; 355 struct snd_soc_pcm_runtime *rtd = substream->private_data; 356 struct snd_soc_dai *codec_dai; 357 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver; 358 struct snd_soc_dai_driver *codec_dai_drv; 359 struct snd_soc_pcm_stream *codec_stream; 360 struct snd_soc_pcm_stream *cpu_stream; 361 unsigned int chan_min = 0, chan_max = UINT_MAX; 362 unsigned int rate_min = 0, rate_max = UINT_MAX; 363 unsigned int rates = UINT_MAX; 364 u64 formats = ULLONG_MAX; 365 int i; 366 367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 368 cpu_stream = &cpu_dai_drv->playback; 369 else 370 cpu_stream = &cpu_dai_drv->capture; 371 372 /* first calculate min/max only for CODECs in the DAI link */ 373 for_each_rtd_codec_dai(rtd, i, codec_dai) { 374 375 /* 376 * Skip CODECs which don't support the current stream type. 377 * Otherwise, since the rate, channel, and format values will 378 * zero in that case, we would have no usable settings left, 379 * causing the resulting setup to fail. 380 * At least one CODEC should match, otherwise we should have 381 * bailed out on a higher level, since there would be no 382 * CODEC to support the transfer direction in that case. 383 */ 384 if (!snd_soc_dai_stream_valid(codec_dai, 385 substream->stream)) 386 continue; 387 388 codec_dai_drv = codec_dai->driver; 389 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 390 codec_stream = &codec_dai_drv->playback; 391 else 392 codec_stream = &codec_dai_drv->capture; 393 chan_min = max(chan_min, codec_stream->channels_min); 394 chan_max = min(chan_max, codec_stream->channels_max); 395 rate_min = max(rate_min, codec_stream->rate_min); 396 rate_max = min_not_zero(rate_max, codec_stream->rate_max); 397 formats &= codec_stream->formats; 398 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates); 399 } 400 401 /* 402 * chan min/max cannot be enforced if there are multiple CODEC DAIs 403 * connected to a single CPU DAI, use CPU DAI's directly and let 404 * channel allocation be fixed up later 405 */ 406 if (rtd->num_codecs > 1) { 407 chan_min = cpu_stream->channels_min; 408 chan_max = cpu_stream->channels_max; 409 } 410 411 hw->channels_min = max(chan_min, cpu_stream->channels_min); 412 hw->channels_max = min(chan_max, cpu_stream->channels_max); 413 if (hw->formats) 414 hw->formats &= formats & cpu_stream->formats; 415 else 416 hw->formats = formats & cpu_stream->formats; 417 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates); 418 419 snd_pcm_limit_hw_rates(runtime); 420 421 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min); 422 hw->rate_min = max(hw->rate_min, rate_min); 423 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max); 424 hw->rate_max = min_not_zero(hw->rate_max, rate_max); 425 } 426 427 static int soc_pcm_components_open(struct snd_pcm_substream *substream, 428 struct snd_soc_component **last) 429 { 430 struct snd_soc_pcm_runtime *rtd = substream->private_data; 431 struct snd_soc_component *component; 432 int i, ret = 0; 433 434 for_each_rtd_components(rtd, i, component) { 435 *last = component; 436 437 ret = snd_soc_component_module_get_when_open(component); 438 if (ret < 0) { 439 dev_err(component->dev, 440 "ASoC: can't get module %s\n", 441 component->name); 442 return ret; 443 } 444 445 ret = snd_soc_component_open(component, substream); 446 if (ret < 0) { 447 dev_err(component->dev, 448 "ASoC: can't open component %s: %d\n", 449 component->name, ret); 450 return ret; 451 } 452 } 453 *last = NULL; 454 return 0; 455 } 456 457 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 458 struct snd_soc_component *last) 459 { 460 struct snd_soc_pcm_runtime *rtd = substream->private_data; 461 struct snd_soc_component *component; 462 int i, ret = 0; 463 464 for_each_rtd_components(rtd, i, component) { 465 if (component == last) 466 break; 467 468 ret |= snd_soc_component_close(component, substream); 469 snd_soc_component_module_put_when_close(component); 470 } 471 472 return ret; 473 } 474 475 /* 476 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 477 * then initialized and any private data can be allocated. This also calls 478 * startup for the cpu DAI, component, machine and codec DAI. 479 */ 480 static int soc_pcm_open(struct snd_pcm_substream *substream) 481 { 482 struct snd_soc_pcm_runtime *rtd = substream->private_data; 483 struct snd_pcm_runtime *runtime = substream->runtime; 484 struct snd_soc_component *component; 485 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 486 struct snd_soc_dai *codec_dai; 487 const char *codec_dai_name = "multicodec"; 488 int i, ret = 0; 489 490 for_each_rtd_components(rtd, i, component) 491 pinctrl_pm_select_default_state(component->dev); 492 493 for_each_rtd_components(rtd, i, component) 494 pm_runtime_get_sync(component->dev); 495 496 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 497 498 /* startup the audio subsystem */ 499 ret = snd_soc_dai_startup(cpu_dai, substream); 500 if (ret < 0) { 501 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n", 502 cpu_dai->name, ret); 503 goto out; 504 } 505 506 ret = soc_pcm_components_open(substream, &component); 507 if (ret < 0) 508 goto component_err; 509 510 for_each_rtd_codec_dai(rtd, i, codec_dai) { 511 ret = snd_soc_dai_startup(codec_dai, substream); 512 if (ret < 0) { 513 dev_err(codec_dai->dev, 514 "ASoC: can't open codec %s: %d\n", 515 codec_dai->name, ret); 516 goto codec_dai_err; 517 } 518 519 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 520 codec_dai->tx_mask = 0; 521 else 522 codec_dai->rx_mask = 0; 523 } 524 525 if (rtd->dai_link->ops->startup) { 526 ret = rtd->dai_link->ops->startup(substream); 527 if (ret < 0) { 528 pr_err("ASoC: %s startup failed: %d\n", 529 rtd->dai_link->name, ret); 530 goto machine_err; 531 } 532 } 533 534 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 535 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 536 goto dynamic; 537 538 /* Check that the codec and cpu DAIs are compatible */ 539 soc_pcm_init_runtime_hw(substream); 540 541 if (rtd->num_codecs == 1) 542 codec_dai_name = rtd->codec_dai->name; 543 544 if (soc_pcm_has_symmetry(substream)) 545 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 546 547 ret = -EINVAL; 548 if (!runtime->hw.rates) { 549 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n", 550 codec_dai_name, cpu_dai->name); 551 goto config_err; 552 } 553 if (!runtime->hw.formats) { 554 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n", 555 codec_dai_name, cpu_dai->name); 556 goto config_err; 557 } 558 if (!runtime->hw.channels_min || !runtime->hw.channels_max || 559 runtime->hw.channels_min > runtime->hw.channels_max) { 560 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n", 561 codec_dai_name, cpu_dai->name); 562 goto config_err; 563 } 564 565 soc_pcm_apply_msb(substream); 566 567 /* Symmetry only applies if we've already got an active stream. */ 568 if (cpu_dai->active) { 569 ret = soc_pcm_apply_symmetry(substream, cpu_dai); 570 if (ret != 0) 571 goto config_err; 572 } 573 574 for_each_rtd_codec_dai(rtd, i, codec_dai) { 575 if (codec_dai->active) { 576 ret = soc_pcm_apply_symmetry(substream, codec_dai); 577 if (ret != 0) 578 goto config_err; 579 } 580 } 581 582 pr_debug("ASoC: %s <-> %s info:\n", 583 codec_dai_name, cpu_dai->name); 584 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates); 585 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min, 586 runtime->hw.channels_max); 587 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min, 588 runtime->hw.rate_max); 589 590 dynamic: 591 592 snd_soc_runtime_activate(rtd, substream->stream); 593 594 mutex_unlock(&rtd->card->pcm_mutex); 595 return 0; 596 597 config_err: 598 if (rtd->dai_link->ops->shutdown) 599 rtd->dai_link->ops->shutdown(substream); 600 601 machine_err: 602 i = rtd->num_codecs; 603 604 codec_dai_err: 605 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) 606 snd_soc_dai_shutdown(codec_dai, substream); 607 608 component_err: 609 soc_pcm_components_close(substream, component); 610 611 snd_soc_dai_shutdown(cpu_dai, substream); 612 out: 613 mutex_unlock(&rtd->card->pcm_mutex); 614 615 for_each_rtd_components(rtd, i, component) { 616 pm_runtime_mark_last_busy(component->dev); 617 pm_runtime_put_autosuspend(component->dev); 618 } 619 620 for_each_rtd_components(rtd, i, component) 621 if (!component->active) 622 pinctrl_pm_select_sleep_state(component->dev); 623 624 return ret; 625 } 626 627 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd) 628 { 629 /* 630 * Currently nothing to do for c2c links 631 * Since c2c links are internal nodes in the DAPM graph and 632 * don't interface with the outside world or application layer 633 * we don't have to do any special handling on close. 634 */ 635 } 636 637 /* 638 * Called by ALSA when a PCM substream is closed. Private data can be 639 * freed here. The cpu DAI, codec DAI, machine and components are also 640 * shutdown. 641 */ 642 static int soc_pcm_close(struct snd_pcm_substream *substream) 643 { 644 struct snd_soc_pcm_runtime *rtd = substream->private_data; 645 struct snd_soc_component *component; 646 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 647 struct snd_soc_dai *codec_dai; 648 int i; 649 650 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 651 652 snd_soc_runtime_deactivate(rtd, substream->stream); 653 654 /* clear the corresponding DAIs rate when inactive */ 655 if (!cpu_dai->active) 656 cpu_dai->rate = 0; 657 658 for_each_rtd_codec_dai(rtd, i, codec_dai) { 659 if (!codec_dai->active) 660 codec_dai->rate = 0; 661 } 662 663 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream); 664 665 snd_soc_dai_shutdown(cpu_dai, substream); 666 667 for_each_rtd_codec_dai(rtd, i, codec_dai) 668 snd_soc_dai_shutdown(codec_dai, substream); 669 670 if (rtd->dai_link->ops->shutdown) 671 rtd->dai_link->ops->shutdown(substream); 672 673 soc_pcm_components_close(substream, NULL); 674 675 snd_soc_dapm_stream_stop(rtd, substream->stream); 676 677 mutex_unlock(&rtd->card->pcm_mutex); 678 679 for_each_rtd_components(rtd, i, component) { 680 pm_runtime_mark_last_busy(component->dev); 681 pm_runtime_put_autosuspend(component->dev); 682 } 683 684 for_each_rtd_components(rtd, i, component) 685 if (!component->active) 686 pinctrl_pm_select_sleep_state(component->dev); 687 688 return 0; 689 } 690 691 /* 692 * Called by ALSA when the PCM substream is prepared, can set format, sample 693 * rate, etc. This function is non atomic and can be called multiple times, 694 * it can refer to the runtime info. 695 */ 696 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 697 { 698 struct snd_soc_pcm_runtime *rtd = substream->private_data; 699 struct snd_soc_component *component; 700 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 701 struct snd_soc_dai *codec_dai; 702 int i, ret = 0; 703 704 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 705 706 if (rtd->dai_link->ops->prepare) { 707 ret = rtd->dai_link->ops->prepare(substream); 708 if (ret < 0) { 709 dev_err(rtd->card->dev, "ASoC: machine prepare error:" 710 " %d\n", ret); 711 goto out; 712 } 713 } 714 715 for_each_rtd_components(rtd, i, component) { 716 ret = snd_soc_component_prepare(component, substream); 717 if (ret < 0) { 718 dev_err(component->dev, 719 "ASoC: platform prepare error: %d\n", ret); 720 goto out; 721 } 722 } 723 724 for_each_rtd_codec_dai(rtd, i, codec_dai) { 725 ret = snd_soc_dai_prepare(codec_dai, substream); 726 if (ret < 0) { 727 dev_err(codec_dai->dev, 728 "ASoC: codec DAI prepare error: %d\n", 729 ret); 730 goto out; 731 } 732 } 733 734 ret = snd_soc_dai_prepare(cpu_dai, substream); 735 if (ret < 0) { 736 dev_err(cpu_dai->dev, 737 "ASoC: cpu DAI prepare error: %d\n", ret); 738 goto out; 739 } 740 741 /* cancel any delayed stream shutdown that is pending */ 742 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 743 rtd->pop_wait) { 744 rtd->pop_wait = 0; 745 cancel_delayed_work(&rtd->delayed_work); 746 } 747 748 snd_soc_dapm_stream_event(rtd, substream->stream, 749 SND_SOC_DAPM_STREAM_START); 750 751 for_each_rtd_codec_dai(rtd, i, codec_dai) 752 snd_soc_dai_digital_mute(codec_dai, 0, 753 substream->stream); 754 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream); 755 756 out: 757 mutex_unlock(&rtd->card->pcm_mutex); 758 return ret; 759 } 760 761 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 762 unsigned int mask) 763 { 764 struct snd_interval *interval; 765 int channels = hweight_long(mask); 766 767 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 768 interval->min = channels; 769 interval->max = channels; 770 } 771 772 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream, 773 struct snd_soc_component *last) 774 { 775 struct snd_soc_pcm_runtime *rtd = substream->private_data; 776 struct snd_soc_component *component; 777 int i, ret = 0; 778 779 for_each_rtd_components(rtd, i, component) { 780 if (component == last) 781 break; 782 783 ret |= snd_soc_component_hw_free(component, substream); 784 } 785 786 return ret; 787 } 788 789 /* 790 * Called by ALSA when the hardware params are set by application. This 791 * function can also be called multiple times and can allocate buffers 792 * (using snd_pcm_lib_* ). It's non-atomic. 793 */ 794 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 795 struct snd_pcm_hw_params *params) 796 { 797 struct snd_soc_pcm_runtime *rtd = substream->private_data; 798 struct snd_soc_component *component; 799 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 800 struct snd_soc_dai *codec_dai; 801 int i, ret = 0; 802 803 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 804 805 ret = soc_pcm_params_symmetry(substream, params); 806 if (ret) 807 goto out; 808 809 if (rtd->dai_link->ops->hw_params) { 810 ret = rtd->dai_link->ops->hw_params(substream, params); 811 if (ret < 0) { 812 dev_err(rtd->card->dev, "ASoC: machine hw_params" 813 " failed: %d\n", ret); 814 goto out; 815 } 816 } 817 818 for_each_rtd_codec_dai(rtd, i, codec_dai) { 819 struct snd_pcm_hw_params codec_params; 820 821 /* 822 * Skip CODECs which don't support the current stream type, 823 * the idea being that if a CODEC is not used for the currently 824 * set up transfer direction, it should not need to be 825 * configured, especially since the configuration used might 826 * not even be supported by that CODEC. There may be cases 827 * however where a CODEC needs to be set up although it is 828 * actually not being used for the transfer, e.g. if a 829 * capture-only CODEC is acting as an LRCLK and/or BCLK master 830 * for the DAI link including a playback-only CODEC. 831 * If this becomes necessary, we will have to augment the 832 * machine driver setup with information on how to act, so 833 * we can do the right thing here. 834 */ 835 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 836 continue; 837 838 /* copy params for each codec */ 839 codec_params = *params; 840 841 /* fixup params based on TDM slot masks */ 842 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 843 codec_dai->tx_mask) 844 soc_pcm_codec_params_fixup(&codec_params, 845 codec_dai->tx_mask); 846 847 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 848 codec_dai->rx_mask) 849 soc_pcm_codec_params_fixup(&codec_params, 850 codec_dai->rx_mask); 851 852 ret = snd_soc_dai_hw_params(codec_dai, substream, 853 &codec_params); 854 if(ret < 0) 855 goto codec_err; 856 857 codec_dai->rate = params_rate(&codec_params); 858 codec_dai->channels = params_channels(&codec_params); 859 codec_dai->sample_bits = snd_pcm_format_physical_width( 860 params_format(&codec_params)); 861 862 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 863 } 864 865 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 866 if (ret < 0) 867 goto interface_err; 868 869 /* store the parameters for each DAIs */ 870 cpu_dai->rate = params_rate(params); 871 cpu_dai->channels = params_channels(params); 872 cpu_dai->sample_bits = 873 snd_pcm_format_physical_width(params_format(params)); 874 875 snd_soc_dapm_update_dai(substream, params, cpu_dai); 876 877 for_each_rtd_components(rtd, i, component) { 878 ret = snd_soc_component_hw_params(component, substream, params); 879 if (ret < 0) { 880 dev_err(component->dev, 881 "ASoC: %s hw params failed: %d\n", 882 component->name, ret); 883 goto component_err; 884 } 885 } 886 component = NULL; 887 888 out: 889 mutex_unlock(&rtd->card->pcm_mutex); 890 return ret; 891 892 component_err: 893 soc_pcm_components_hw_free(substream, component); 894 895 snd_soc_dai_hw_free(cpu_dai, substream); 896 cpu_dai->rate = 0; 897 898 interface_err: 899 i = rtd->num_codecs; 900 901 codec_err: 902 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) { 903 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 904 continue; 905 906 snd_soc_dai_hw_free(codec_dai, substream); 907 codec_dai->rate = 0; 908 } 909 910 if (rtd->dai_link->ops->hw_free) 911 rtd->dai_link->ops->hw_free(substream); 912 913 mutex_unlock(&rtd->card->pcm_mutex); 914 return ret; 915 } 916 917 /* 918 * Frees resources allocated by hw_params, can be called multiple times 919 */ 920 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 921 { 922 struct snd_soc_pcm_runtime *rtd = substream->private_data; 923 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 924 struct snd_soc_dai *codec_dai; 925 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 926 int i; 927 928 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 929 930 /* clear the corresponding DAIs parameters when going to be inactive */ 931 if (cpu_dai->active == 1) { 932 cpu_dai->rate = 0; 933 cpu_dai->channels = 0; 934 cpu_dai->sample_bits = 0; 935 } 936 937 for_each_rtd_codec_dai(rtd, i, codec_dai) { 938 if (codec_dai->active == 1) { 939 codec_dai->rate = 0; 940 codec_dai->channels = 0; 941 codec_dai->sample_bits = 0; 942 } 943 } 944 945 /* apply codec digital mute */ 946 for_each_rtd_codec_dai(rtd, i, codec_dai) { 947 if ((playback && codec_dai->playback_active == 1) || 948 (!playback && codec_dai->capture_active == 1)) 949 snd_soc_dai_digital_mute(codec_dai, 1, 950 substream->stream); 951 } 952 953 /* free any machine hw params */ 954 if (rtd->dai_link->ops->hw_free) 955 rtd->dai_link->ops->hw_free(substream); 956 957 /* free any component resources */ 958 soc_pcm_components_hw_free(substream, NULL); 959 960 /* now free hw params for the DAIs */ 961 for_each_rtd_codec_dai(rtd, i, codec_dai) { 962 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 963 continue; 964 965 snd_soc_dai_hw_free(codec_dai, substream); 966 } 967 968 snd_soc_dai_hw_free(cpu_dai, substream); 969 970 mutex_unlock(&rtd->card->pcm_mutex); 971 return 0; 972 } 973 974 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd) 975 { 976 struct snd_soc_pcm_runtime *rtd = substream->private_data; 977 struct snd_soc_component *component; 978 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 979 struct snd_soc_dai *codec_dai; 980 int i, ret; 981 982 if (rtd->dai_link->ops->trigger) { 983 ret = rtd->dai_link->ops->trigger(substream, cmd); 984 if (ret < 0) 985 return ret; 986 } 987 988 for_each_rtd_components(rtd, i, component) { 989 ret = snd_soc_component_trigger(component, substream, cmd); 990 if (ret < 0) 991 return ret; 992 } 993 994 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd); 995 if (ret < 0) 996 return ret; 997 998 for_each_rtd_codec_dai(rtd, i, codec_dai) { 999 ret = snd_soc_dai_trigger(codec_dai, substream, cmd); 1000 if (ret < 0) 1001 return ret; 1002 } 1003 1004 return 0; 1005 } 1006 1007 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd) 1008 { 1009 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1010 struct snd_soc_component *component; 1011 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1012 struct snd_soc_dai *codec_dai; 1013 int i, ret; 1014 1015 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1016 ret = snd_soc_dai_trigger(codec_dai, substream, cmd); 1017 if (ret < 0) 1018 return ret; 1019 } 1020 1021 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd); 1022 if (ret < 0) 1023 return ret; 1024 1025 for_each_rtd_components(rtd, i, component) { 1026 ret = snd_soc_component_trigger(component, substream, cmd); 1027 if (ret < 0) 1028 return ret; 1029 } 1030 1031 if (rtd->dai_link->ops->trigger) { 1032 ret = rtd->dai_link->ops->trigger(substream, cmd); 1033 if (ret < 0) 1034 return ret; 1035 } 1036 1037 return 0; 1038 } 1039 1040 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1041 { 1042 int ret; 1043 1044 switch (cmd) { 1045 case SNDRV_PCM_TRIGGER_START: 1046 case SNDRV_PCM_TRIGGER_RESUME: 1047 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1048 ret = soc_pcm_trigger_start(substream, cmd); 1049 break; 1050 case SNDRV_PCM_TRIGGER_STOP: 1051 case SNDRV_PCM_TRIGGER_SUSPEND: 1052 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1053 ret = soc_pcm_trigger_stop(substream, cmd); 1054 break; 1055 default: 1056 return -EINVAL; 1057 } 1058 1059 return ret; 1060 } 1061 1062 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream, 1063 int cmd) 1064 { 1065 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1066 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1067 struct snd_soc_dai *codec_dai; 1068 int i, ret; 1069 1070 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1071 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd); 1072 if (ret < 0) 1073 return ret; 1074 } 1075 1076 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd); 1077 if (ret < 0) 1078 return ret; 1079 1080 return 0; 1081 } 1082 /* 1083 * soc level wrapper for pointer callback 1084 * If cpu_dai, codec_dai, component driver has the delay callback, then 1085 * the runtime->delay will be updated accordingly. 1086 */ 1087 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1088 { 1089 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1090 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1091 struct snd_soc_dai *codec_dai; 1092 struct snd_pcm_runtime *runtime = substream->runtime; 1093 snd_pcm_uframes_t offset = 0; 1094 snd_pcm_sframes_t delay = 0; 1095 snd_pcm_sframes_t codec_delay = 0; 1096 int i; 1097 1098 /* clearing the previous total delay */ 1099 runtime->delay = 0; 1100 1101 offset = snd_soc_pcm_component_pointer(substream); 1102 1103 /* base delay if assigned in pointer callback */ 1104 delay = runtime->delay; 1105 1106 delay += snd_soc_dai_delay(cpu_dai, substream); 1107 1108 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1109 codec_delay = max(codec_delay, 1110 snd_soc_dai_delay(codec_dai, substream)); 1111 } 1112 delay += codec_delay; 1113 1114 runtime->delay = delay; 1115 1116 return offset; 1117 } 1118 1119 /* connect a FE and BE */ 1120 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1121 struct snd_soc_pcm_runtime *be, int stream) 1122 { 1123 struct snd_soc_dpcm *dpcm; 1124 unsigned long flags; 1125 #ifdef CONFIG_DEBUG_FS 1126 char *name; 1127 #endif 1128 1129 /* only add new dpcms */ 1130 for_each_dpcm_be(fe, stream, dpcm) { 1131 if (dpcm->be == be && dpcm->fe == fe) 1132 return 0; 1133 } 1134 1135 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1136 if (!dpcm) 1137 return -ENOMEM; 1138 1139 dpcm->be = be; 1140 dpcm->fe = fe; 1141 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1142 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1143 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1144 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1145 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1146 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1147 1148 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1149 stream ? "capture" : "playback", fe->dai_link->name, 1150 stream ? "<-" : "->", be->dai_link->name); 1151 1152 #ifdef CONFIG_DEBUG_FS 1153 name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name, 1154 stream ? "capture" : "playback"); 1155 if (name) { 1156 dpcm->debugfs_state = debugfs_create_dir(name, 1157 fe->debugfs_dpcm_root); 1158 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 1159 &dpcm->state); 1160 kfree(name); 1161 } 1162 #endif 1163 return 1; 1164 } 1165 1166 /* reparent a BE onto another FE */ 1167 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1168 struct snd_soc_pcm_runtime *be, int stream) 1169 { 1170 struct snd_soc_dpcm *dpcm; 1171 struct snd_pcm_substream *fe_substream, *be_substream; 1172 1173 /* reparent if BE is connected to other FEs */ 1174 if (!be->dpcm[stream].users) 1175 return; 1176 1177 be_substream = snd_soc_dpcm_get_substream(be, stream); 1178 1179 for_each_dpcm_fe(be, stream, dpcm) { 1180 if (dpcm->fe == fe) 1181 continue; 1182 1183 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1184 stream ? "capture" : "playback", 1185 dpcm->fe->dai_link->name, 1186 stream ? "<-" : "->", dpcm->be->dai_link->name); 1187 1188 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1189 be_substream->runtime = fe_substream->runtime; 1190 break; 1191 } 1192 } 1193 1194 /* disconnect a BE and FE */ 1195 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1196 { 1197 struct snd_soc_dpcm *dpcm, *d; 1198 unsigned long flags; 1199 1200 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1201 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1202 stream ? "capture" : "playback", 1203 dpcm->be->dai_link->name); 1204 1205 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1206 continue; 1207 1208 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1209 stream ? "capture" : "playback", fe->dai_link->name, 1210 stream ? "<-" : "->", dpcm->be->dai_link->name); 1211 1212 /* BEs still alive need new FE */ 1213 dpcm_be_reparent(fe, dpcm->be, stream); 1214 1215 #ifdef CONFIG_DEBUG_FS 1216 debugfs_remove_recursive(dpcm->debugfs_state); 1217 #endif 1218 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1219 list_del(&dpcm->list_be); 1220 list_del(&dpcm->list_fe); 1221 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1222 kfree(dpcm); 1223 } 1224 } 1225 1226 /* get BE for DAI widget and stream */ 1227 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1228 struct snd_soc_dapm_widget *widget, int stream) 1229 { 1230 struct snd_soc_pcm_runtime *be; 1231 struct snd_soc_dai *dai; 1232 int i; 1233 1234 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1235 1236 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1237 for_each_card_rtds(card, be) { 1238 1239 if (!be->dai_link->no_pcm) 1240 continue; 1241 1242 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1243 be->cpu_dai->playback_widget ? 1244 be->cpu_dai->playback_widget->name : "(not set)"); 1245 1246 if (be->cpu_dai->playback_widget == widget) 1247 return be; 1248 1249 for_each_rtd_codec_dai(be, i, dai) { 1250 if (dai->playback_widget == widget) 1251 return be; 1252 } 1253 } 1254 } else { 1255 1256 for_each_card_rtds(card, be) { 1257 1258 if (!be->dai_link->no_pcm) 1259 continue; 1260 1261 dev_dbg(card->dev, "ASoC: try BE %s\n", 1262 be->cpu_dai->capture_widget ? 1263 be->cpu_dai->capture_widget->name : "(not set)"); 1264 1265 if (be->cpu_dai->capture_widget == widget) 1266 return be; 1267 1268 for_each_rtd_codec_dai(be, i, dai) { 1269 if (dai->capture_widget == widget) 1270 return be; 1271 } 1272 } 1273 } 1274 1275 /* dai link name and stream name set correctly ? */ 1276 dev_err(card->dev, "ASoC: can't get %s BE for %s\n", 1277 stream ? "capture" : "playback", widget->name); 1278 return NULL; 1279 } 1280 1281 static inline struct snd_soc_dapm_widget * 1282 dai_get_widget(struct snd_soc_dai *dai, int stream) 1283 { 1284 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1285 return dai->playback_widget; 1286 else 1287 return dai->capture_widget; 1288 } 1289 1290 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1291 struct snd_soc_dapm_widget *widget) 1292 { 1293 int i; 1294 1295 for (i = 0; i < list->num_widgets; i++) { 1296 if (widget == list->widgets[i]) 1297 return 1; 1298 } 1299 1300 return 0; 1301 } 1302 1303 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, 1304 enum snd_soc_dapm_direction dir) 1305 { 1306 struct snd_soc_card *card = widget->dapm->card; 1307 struct snd_soc_pcm_runtime *rtd; 1308 struct snd_soc_dai *dai; 1309 int i; 1310 1311 if (dir == SND_SOC_DAPM_DIR_OUT) { 1312 for_each_card_rtds(card, rtd) { 1313 if (!rtd->dai_link->no_pcm) 1314 continue; 1315 1316 if (rtd->cpu_dai->playback_widget == widget) 1317 return true; 1318 1319 for_each_rtd_codec_dai(rtd, i, dai) { 1320 if (dai->playback_widget == widget) 1321 return true; 1322 } 1323 } 1324 } else { /* SND_SOC_DAPM_DIR_IN */ 1325 for_each_card_rtds(card, rtd) { 1326 if (!rtd->dai_link->no_pcm) 1327 continue; 1328 1329 if (rtd->cpu_dai->capture_widget == widget) 1330 return true; 1331 1332 for_each_rtd_codec_dai(rtd, i, dai) { 1333 if (dai->capture_widget == widget) 1334 return true; 1335 } 1336 } 1337 } 1338 1339 return false; 1340 } 1341 1342 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1343 int stream, struct snd_soc_dapm_widget_list **list) 1344 { 1345 struct snd_soc_dai *cpu_dai = fe->cpu_dai; 1346 int paths; 1347 1348 /* get number of valid DAI paths and their widgets */ 1349 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1350 dpcm_end_walk_at_be); 1351 1352 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1353 stream ? "capture" : "playback"); 1354 1355 return paths; 1356 } 1357 1358 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1359 struct snd_soc_dapm_widget_list **list_) 1360 { 1361 struct snd_soc_dpcm *dpcm; 1362 struct snd_soc_dapm_widget_list *list = *list_; 1363 struct snd_soc_dapm_widget *widget; 1364 struct snd_soc_dai *dai; 1365 int prune = 0; 1366 int do_prune; 1367 1368 /* Destroy any old FE <--> BE connections */ 1369 for_each_dpcm_be(fe, stream, dpcm) { 1370 unsigned int i; 1371 1372 /* is there a valid CPU DAI widget for this BE */ 1373 widget = dai_get_widget(dpcm->be->cpu_dai, stream); 1374 1375 /* prune the BE if it's no longer in our active list */ 1376 if (widget && widget_in_list(list, widget)) 1377 continue; 1378 1379 /* is there a valid CODEC DAI widget for this BE */ 1380 do_prune = 1; 1381 for_each_rtd_codec_dai(dpcm->be, i, dai) { 1382 widget = dai_get_widget(dai, stream); 1383 1384 /* prune the BE if it's no longer in our active list */ 1385 if (widget && widget_in_list(list, widget)) 1386 do_prune = 0; 1387 } 1388 if (!do_prune) 1389 continue; 1390 1391 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1392 stream ? "capture" : "playback", 1393 dpcm->be->dai_link->name, fe->dai_link->name); 1394 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1395 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1396 prune++; 1397 } 1398 1399 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1400 return prune; 1401 } 1402 1403 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1404 struct snd_soc_dapm_widget_list **list_) 1405 { 1406 struct snd_soc_card *card = fe->card; 1407 struct snd_soc_dapm_widget_list *list = *list_; 1408 struct snd_soc_pcm_runtime *be; 1409 int i, new = 0, err; 1410 1411 /* Create any new FE <--> BE connections */ 1412 for (i = 0; i < list->num_widgets; i++) { 1413 1414 switch (list->widgets[i]->id) { 1415 case snd_soc_dapm_dai_in: 1416 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1417 continue; 1418 break; 1419 case snd_soc_dapm_dai_out: 1420 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1421 continue; 1422 break; 1423 default: 1424 continue; 1425 } 1426 1427 /* is there a valid BE rtd for this widget */ 1428 be = dpcm_get_be(card, list->widgets[i], stream); 1429 if (!be) { 1430 dev_err(fe->dev, "ASoC: no BE found for %s\n", 1431 list->widgets[i]->name); 1432 continue; 1433 } 1434 1435 /* make sure BE is a real BE */ 1436 if (!be->dai_link->no_pcm) 1437 continue; 1438 1439 /* don't connect if FE is not running */ 1440 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1441 continue; 1442 1443 /* newly connected FE and BE */ 1444 err = dpcm_be_connect(fe, be, stream); 1445 if (err < 0) { 1446 dev_err(fe->dev, "ASoC: can't connect %s\n", 1447 list->widgets[i]->name); 1448 break; 1449 } else if (err == 0) /* already connected */ 1450 continue; 1451 1452 /* new */ 1453 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1454 new++; 1455 } 1456 1457 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1458 return new; 1459 } 1460 1461 /* 1462 * Find the corresponding BE DAIs that source or sink audio to this 1463 * FE substream. 1464 */ 1465 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1466 int stream, struct snd_soc_dapm_widget_list **list, int new) 1467 { 1468 if (new) 1469 return dpcm_add_paths(fe, stream, list); 1470 else 1471 return dpcm_prune_paths(fe, stream, list); 1472 } 1473 1474 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1475 { 1476 struct snd_soc_dpcm *dpcm; 1477 unsigned long flags; 1478 1479 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1480 for_each_dpcm_be(fe, stream, dpcm) 1481 dpcm->be->dpcm[stream].runtime_update = 1482 SND_SOC_DPCM_UPDATE_NO; 1483 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1484 } 1485 1486 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1487 int stream) 1488 { 1489 struct snd_soc_dpcm *dpcm; 1490 1491 /* disable any enabled and non active backends */ 1492 for_each_dpcm_be(fe, stream, dpcm) { 1493 1494 struct snd_soc_pcm_runtime *be = dpcm->be; 1495 struct snd_pcm_substream *be_substream = 1496 snd_soc_dpcm_get_substream(be, stream); 1497 1498 if (be->dpcm[stream].users == 0) 1499 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1500 stream ? "capture" : "playback", 1501 be->dpcm[stream].state); 1502 1503 if (--be->dpcm[stream].users != 0) 1504 continue; 1505 1506 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1507 continue; 1508 1509 soc_pcm_close(be_substream); 1510 be_substream->runtime = NULL; 1511 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1512 } 1513 } 1514 1515 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1516 { 1517 struct snd_soc_dpcm *dpcm; 1518 int err, count = 0; 1519 1520 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1521 for_each_dpcm_be(fe, stream, dpcm) { 1522 1523 struct snd_soc_pcm_runtime *be = dpcm->be; 1524 struct snd_pcm_substream *be_substream = 1525 snd_soc_dpcm_get_substream(be, stream); 1526 1527 if (!be_substream) { 1528 dev_err(be->dev, "ASoC: no backend %s stream\n", 1529 stream ? "capture" : "playback"); 1530 continue; 1531 } 1532 1533 /* is this op for this BE ? */ 1534 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1535 continue; 1536 1537 /* first time the dpcm is open ? */ 1538 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1539 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1540 stream ? "capture" : "playback", 1541 be->dpcm[stream].state); 1542 1543 if (be->dpcm[stream].users++ != 0) 1544 continue; 1545 1546 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1547 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1548 continue; 1549 1550 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1551 stream ? "capture" : "playback", be->dai_link->name); 1552 1553 be_substream->runtime = be->dpcm[stream].runtime; 1554 err = soc_pcm_open(be_substream); 1555 if (err < 0) { 1556 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1557 be->dpcm[stream].users--; 1558 if (be->dpcm[stream].users < 0) 1559 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1560 stream ? "capture" : "playback", 1561 be->dpcm[stream].state); 1562 1563 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1564 goto unwind; 1565 } 1566 1567 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1568 count++; 1569 } 1570 1571 return count; 1572 1573 unwind: 1574 /* disable any enabled and non active backends */ 1575 for_each_dpcm_be_rollback(fe, stream, dpcm) { 1576 struct snd_soc_pcm_runtime *be = dpcm->be; 1577 struct snd_pcm_substream *be_substream = 1578 snd_soc_dpcm_get_substream(be, stream); 1579 1580 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1581 continue; 1582 1583 if (be->dpcm[stream].users == 0) 1584 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1585 stream ? "capture" : "playback", 1586 be->dpcm[stream].state); 1587 1588 if (--be->dpcm[stream].users != 0) 1589 continue; 1590 1591 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1592 continue; 1593 1594 soc_pcm_close(be_substream); 1595 be_substream->runtime = NULL; 1596 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1597 } 1598 1599 return err; 1600 } 1601 1602 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 1603 struct snd_soc_pcm_stream *stream) 1604 { 1605 runtime->hw.rate_min = stream->rate_min; 1606 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX); 1607 runtime->hw.channels_min = stream->channels_min; 1608 runtime->hw.channels_max = stream->channels_max; 1609 if (runtime->hw.formats) 1610 runtime->hw.formats &= stream->formats; 1611 else 1612 runtime->hw.formats = stream->formats; 1613 runtime->hw.rates = stream->rates; 1614 } 1615 1616 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream, 1617 u64 *formats) 1618 { 1619 struct snd_soc_pcm_runtime *fe = substream->private_data; 1620 struct snd_soc_dpcm *dpcm; 1621 struct snd_soc_dai *dai; 1622 int stream = substream->stream; 1623 1624 if (!fe->dai_link->dpcm_merged_format) 1625 return; 1626 1627 /* 1628 * It returns merged BE codec format 1629 * if FE want to use it (= dpcm_merged_format) 1630 */ 1631 1632 for_each_dpcm_be(fe, stream, dpcm) { 1633 struct snd_soc_pcm_runtime *be = dpcm->be; 1634 struct snd_soc_dai_driver *codec_dai_drv; 1635 struct snd_soc_pcm_stream *codec_stream; 1636 int i; 1637 1638 for_each_rtd_codec_dai(be, i, dai) { 1639 /* 1640 * Skip CODECs which don't support the current stream 1641 * type. See soc_pcm_init_runtime_hw() for more details 1642 */ 1643 if (!snd_soc_dai_stream_valid(dai, stream)) 1644 continue; 1645 1646 codec_dai_drv = dai->driver; 1647 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1648 codec_stream = &codec_dai_drv->playback; 1649 else 1650 codec_stream = &codec_dai_drv->capture; 1651 1652 *formats &= codec_stream->formats; 1653 } 1654 } 1655 } 1656 1657 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream, 1658 unsigned int *channels_min, 1659 unsigned int *channels_max) 1660 { 1661 struct snd_soc_pcm_runtime *fe = substream->private_data; 1662 struct snd_soc_dpcm *dpcm; 1663 int stream = substream->stream; 1664 1665 if (!fe->dai_link->dpcm_merged_chan) 1666 return; 1667 1668 /* 1669 * It returns merged BE codec channel; 1670 * if FE want to use it (= dpcm_merged_chan) 1671 */ 1672 1673 for_each_dpcm_be(fe, stream, dpcm) { 1674 struct snd_soc_pcm_runtime *be = dpcm->be; 1675 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver; 1676 struct snd_soc_dai_driver *codec_dai_drv; 1677 struct snd_soc_pcm_stream *codec_stream; 1678 struct snd_soc_pcm_stream *cpu_stream; 1679 1680 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1681 cpu_stream = &cpu_dai_drv->playback; 1682 else 1683 cpu_stream = &cpu_dai_drv->capture; 1684 1685 *channels_min = max(*channels_min, cpu_stream->channels_min); 1686 *channels_max = min(*channels_max, cpu_stream->channels_max); 1687 1688 /* 1689 * chan min/max cannot be enforced if there are multiple CODEC 1690 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1691 */ 1692 if (be->num_codecs == 1) { 1693 codec_dai_drv = be->codec_dais[0]->driver; 1694 1695 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1696 codec_stream = &codec_dai_drv->playback; 1697 else 1698 codec_stream = &codec_dai_drv->capture; 1699 1700 *channels_min = max(*channels_min, 1701 codec_stream->channels_min); 1702 *channels_max = min(*channels_max, 1703 codec_stream->channels_max); 1704 } 1705 } 1706 } 1707 1708 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream, 1709 unsigned int *rates, 1710 unsigned int *rate_min, 1711 unsigned int *rate_max) 1712 { 1713 struct snd_soc_pcm_runtime *fe = substream->private_data; 1714 struct snd_soc_dpcm *dpcm; 1715 int stream = substream->stream; 1716 1717 if (!fe->dai_link->dpcm_merged_rate) 1718 return; 1719 1720 /* 1721 * It returns merged BE codec channel; 1722 * if FE want to use it (= dpcm_merged_chan) 1723 */ 1724 1725 for_each_dpcm_be(fe, stream, dpcm) { 1726 struct snd_soc_pcm_runtime *be = dpcm->be; 1727 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver; 1728 struct snd_soc_dai_driver *codec_dai_drv; 1729 struct snd_soc_pcm_stream *codec_stream; 1730 struct snd_soc_pcm_stream *cpu_stream; 1731 struct snd_soc_dai *dai; 1732 int i; 1733 1734 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1735 cpu_stream = &cpu_dai_drv->playback; 1736 else 1737 cpu_stream = &cpu_dai_drv->capture; 1738 1739 *rate_min = max(*rate_min, cpu_stream->rate_min); 1740 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max); 1741 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates); 1742 1743 for_each_rtd_codec_dai(be, i, dai) { 1744 /* 1745 * Skip CODECs which don't support the current stream 1746 * type. See soc_pcm_init_runtime_hw() for more details 1747 */ 1748 if (!snd_soc_dai_stream_valid(dai, stream)) 1749 continue; 1750 1751 codec_dai_drv = dai->driver; 1752 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1753 codec_stream = &codec_dai_drv->playback; 1754 else 1755 codec_stream = &codec_dai_drv->capture; 1756 1757 *rate_min = max(*rate_min, codec_stream->rate_min); 1758 *rate_max = min_not_zero(*rate_max, 1759 codec_stream->rate_max); 1760 *rates = snd_pcm_rate_mask_intersect(*rates, 1761 codec_stream->rates); 1762 } 1763 } 1764 } 1765 1766 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1767 { 1768 struct snd_pcm_runtime *runtime = substream->runtime; 1769 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1770 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1771 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 1772 1773 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1774 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback); 1775 else 1776 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture); 1777 1778 dpcm_runtime_merge_format(substream, &runtime->hw.formats); 1779 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min, 1780 &runtime->hw.channels_max); 1781 dpcm_runtime_merge_rate(substream, &runtime->hw.rates, 1782 &runtime->hw.rate_min, &runtime->hw.rate_max); 1783 } 1784 1785 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 1786 1787 /* Set FE's runtime_update state; the state is protected via PCM stream lock 1788 * for avoiding the race with trigger callback. 1789 * If the state is unset and a trigger is pending while the previous operation, 1790 * process the pending trigger action here. 1791 */ 1792 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 1793 int stream, enum snd_soc_dpcm_update state) 1794 { 1795 struct snd_pcm_substream *substream = 1796 snd_soc_dpcm_get_substream(fe, stream); 1797 1798 snd_pcm_stream_lock_irq(substream); 1799 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 1800 dpcm_fe_dai_do_trigger(substream, 1801 fe->dpcm[stream].trigger_pending - 1); 1802 fe->dpcm[stream].trigger_pending = 0; 1803 } 1804 fe->dpcm[stream].runtime_update = state; 1805 snd_pcm_stream_unlock_irq(substream); 1806 } 1807 1808 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1809 int stream) 1810 { 1811 struct snd_soc_dpcm *dpcm; 1812 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1813 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai; 1814 int err; 1815 1816 /* apply symmetry for FE */ 1817 if (soc_pcm_has_symmetry(fe_substream)) 1818 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1819 1820 /* Symmetry only applies if we've got an active stream. */ 1821 if (fe_cpu_dai->active) { 1822 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1823 if (err < 0) 1824 return err; 1825 } 1826 1827 /* apply symmetry for BE */ 1828 for_each_dpcm_be(fe, stream, dpcm) { 1829 struct snd_soc_pcm_runtime *be = dpcm->be; 1830 struct snd_pcm_substream *be_substream = 1831 snd_soc_dpcm_get_substream(be, stream); 1832 struct snd_soc_pcm_runtime *rtd; 1833 struct snd_soc_dai *codec_dai; 1834 int i; 1835 1836 /* A backend may not have the requested substream */ 1837 if (!be_substream) 1838 continue; 1839 1840 rtd = be_substream->private_data; 1841 if (rtd->dai_link->be_hw_params_fixup) 1842 continue; 1843 1844 if (soc_pcm_has_symmetry(be_substream)) 1845 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1846 1847 /* Symmetry only applies if we've got an active stream. */ 1848 if (rtd->cpu_dai->active) { 1849 err = soc_pcm_apply_symmetry(fe_substream, 1850 rtd->cpu_dai); 1851 if (err < 0) 1852 return err; 1853 } 1854 1855 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1856 if (codec_dai->active) { 1857 err = soc_pcm_apply_symmetry(fe_substream, 1858 codec_dai); 1859 if (err < 0) 1860 return err; 1861 } 1862 } 1863 } 1864 1865 return 0; 1866 } 1867 1868 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1869 { 1870 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1871 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1872 int stream = fe_substream->stream, ret = 0; 1873 1874 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1875 1876 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1877 if (ret < 0) { 1878 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1879 goto be_err; 1880 } 1881 1882 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1883 1884 /* start the DAI frontend */ 1885 ret = soc_pcm_open(fe_substream); 1886 if (ret < 0) { 1887 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 1888 goto unwind; 1889 } 1890 1891 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1892 1893 dpcm_set_fe_runtime(fe_substream); 1894 snd_pcm_limit_hw_rates(runtime); 1895 1896 ret = dpcm_apply_symmetry(fe_substream, stream); 1897 if (ret < 0) { 1898 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n", 1899 ret); 1900 goto unwind; 1901 } 1902 1903 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1904 return 0; 1905 1906 unwind: 1907 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1908 be_err: 1909 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1910 return ret; 1911 } 1912 1913 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1914 { 1915 struct snd_soc_dpcm *dpcm; 1916 1917 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 1918 for_each_dpcm_be(fe, stream, dpcm) { 1919 1920 struct snd_soc_pcm_runtime *be = dpcm->be; 1921 struct snd_pcm_substream *be_substream = 1922 snd_soc_dpcm_get_substream(be, stream); 1923 1924 /* is this op for this BE ? */ 1925 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1926 continue; 1927 1928 if (be->dpcm[stream].users == 0) 1929 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1930 stream ? "capture" : "playback", 1931 be->dpcm[stream].state); 1932 1933 if (--be->dpcm[stream].users != 0) 1934 continue; 1935 1936 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1937 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) { 1938 soc_pcm_hw_free(be_substream); 1939 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1940 } 1941 1942 dev_dbg(be->dev, "ASoC: close BE %s\n", 1943 be->dai_link->name); 1944 1945 soc_pcm_close(be_substream); 1946 be_substream->runtime = NULL; 1947 1948 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1949 } 1950 return 0; 1951 } 1952 1953 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1954 { 1955 struct snd_soc_pcm_runtime *fe = substream->private_data; 1956 int stream = substream->stream; 1957 1958 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1959 1960 /* shutdown the BEs */ 1961 dpcm_be_dai_shutdown(fe, substream->stream); 1962 1963 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1964 1965 /* now shutdown the frontend */ 1966 soc_pcm_close(substream); 1967 1968 /* run the stream event for each BE */ 1969 snd_soc_dapm_stream_stop(fe, stream); 1970 1971 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1972 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1973 return 0; 1974 } 1975 1976 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1977 { 1978 struct snd_soc_dpcm *dpcm; 1979 1980 /* only hw_params backends that are either sinks or sources 1981 * to this frontend DAI */ 1982 for_each_dpcm_be(fe, stream, dpcm) { 1983 1984 struct snd_soc_pcm_runtime *be = dpcm->be; 1985 struct snd_pcm_substream *be_substream = 1986 snd_soc_dpcm_get_substream(be, stream); 1987 1988 /* is this op for this BE ? */ 1989 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1990 continue; 1991 1992 /* only free hw when no longer used - check all FEs */ 1993 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1994 continue; 1995 1996 /* do not free hw if this BE is used by other FE */ 1997 if (be->dpcm[stream].users > 1) 1998 continue; 1999 2000 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2001 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2002 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2003 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2004 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2005 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2006 continue; 2007 2008 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2009 be->dai_link->name); 2010 2011 soc_pcm_hw_free(be_substream); 2012 2013 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2014 } 2015 2016 return 0; 2017 } 2018 2019 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2020 { 2021 struct snd_soc_pcm_runtime *fe = substream->private_data; 2022 int err, stream = substream->stream; 2023 2024 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2025 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2026 2027 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2028 2029 /* call hw_free on the frontend */ 2030 err = soc_pcm_hw_free(substream); 2031 if (err < 0) 2032 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 2033 fe->dai_link->name); 2034 2035 /* only hw_params backends that are either sinks or sources 2036 * to this frontend DAI */ 2037 err = dpcm_be_dai_hw_free(fe, stream); 2038 2039 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2040 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2041 2042 mutex_unlock(&fe->card->mutex); 2043 return 0; 2044 } 2045 2046 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2047 { 2048 struct snd_soc_dpcm *dpcm; 2049 int ret; 2050 2051 for_each_dpcm_be(fe, stream, dpcm) { 2052 2053 struct snd_soc_pcm_runtime *be = dpcm->be; 2054 struct snd_pcm_substream *be_substream = 2055 snd_soc_dpcm_get_substream(be, stream); 2056 2057 /* is this op for this BE ? */ 2058 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2059 continue; 2060 2061 /* copy params for each dpcm */ 2062 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 2063 sizeof(struct snd_pcm_hw_params)); 2064 2065 /* perform any hw_params fixups */ 2066 if (be->dai_link->be_hw_params_fixup) { 2067 ret = be->dai_link->be_hw_params_fixup(be, 2068 &dpcm->hw_params); 2069 if (ret < 0) { 2070 dev_err(be->dev, 2071 "ASoC: hw_params BE fixup failed %d\n", 2072 ret); 2073 goto unwind; 2074 } 2075 } 2076 2077 /* copy the fixed-up hw params for BE dai */ 2078 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 2079 sizeof(struct snd_pcm_hw_params)); 2080 2081 /* only allow hw_params() if no connected FEs are running */ 2082 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2083 continue; 2084 2085 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2086 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2087 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2088 continue; 2089 2090 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2091 be->dai_link->name); 2092 2093 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 2094 if (ret < 0) { 2095 dev_err(dpcm->be->dev, 2096 "ASoC: hw_params BE failed %d\n", ret); 2097 goto unwind; 2098 } 2099 2100 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2101 } 2102 return 0; 2103 2104 unwind: 2105 /* disable any enabled and non active backends */ 2106 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2107 struct snd_soc_pcm_runtime *be = dpcm->be; 2108 struct snd_pcm_substream *be_substream = 2109 snd_soc_dpcm_get_substream(be, stream); 2110 2111 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2112 continue; 2113 2114 /* only allow hw_free() if no connected FEs are running */ 2115 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2116 continue; 2117 2118 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2119 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2120 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2121 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2122 continue; 2123 2124 soc_pcm_hw_free(be_substream); 2125 } 2126 2127 return ret; 2128 } 2129 2130 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2131 struct snd_pcm_hw_params *params) 2132 { 2133 struct snd_soc_pcm_runtime *fe = substream->private_data; 2134 int ret, stream = substream->stream; 2135 2136 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2137 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2138 2139 memcpy(&fe->dpcm[substream->stream].hw_params, params, 2140 sizeof(struct snd_pcm_hw_params)); 2141 ret = dpcm_be_dai_hw_params(fe, substream->stream); 2142 if (ret < 0) { 2143 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 2144 goto out; 2145 } 2146 2147 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2148 fe->dai_link->name, params_rate(params), 2149 params_channels(params), params_format(params)); 2150 2151 /* call hw_params on the frontend */ 2152 ret = soc_pcm_hw_params(substream, params); 2153 if (ret < 0) { 2154 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 2155 dpcm_be_dai_hw_free(fe, stream); 2156 } else 2157 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2158 2159 out: 2160 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2161 mutex_unlock(&fe->card->mutex); 2162 return ret; 2163 } 2164 2165 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 2166 struct snd_pcm_substream *substream, int cmd) 2167 { 2168 int ret; 2169 2170 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 2171 dpcm->be->dai_link->name, cmd); 2172 2173 ret = soc_pcm_trigger(substream, cmd); 2174 if (ret < 0) 2175 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 2176 2177 return ret; 2178 } 2179 2180 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2181 int cmd) 2182 { 2183 struct snd_soc_dpcm *dpcm; 2184 int ret = 0; 2185 2186 for_each_dpcm_be(fe, stream, dpcm) { 2187 2188 struct snd_soc_pcm_runtime *be = dpcm->be; 2189 struct snd_pcm_substream *be_substream = 2190 snd_soc_dpcm_get_substream(be, stream); 2191 2192 /* is this op for this BE ? */ 2193 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2194 continue; 2195 2196 switch (cmd) { 2197 case SNDRV_PCM_TRIGGER_START: 2198 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2199 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2200 continue; 2201 2202 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2203 if (ret) 2204 return ret; 2205 2206 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2207 break; 2208 case SNDRV_PCM_TRIGGER_RESUME: 2209 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2210 continue; 2211 2212 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2213 if (ret) 2214 return ret; 2215 2216 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2217 break; 2218 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2219 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2220 continue; 2221 2222 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2223 if (ret) 2224 return ret; 2225 2226 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2227 break; 2228 case SNDRV_PCM_TRIGGER_STOP: 2229 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2230 continue; 2231 2232 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2233 continue; 2234 2235 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2236 if (ret) 2237 return ret; 2238 2239 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2240 break; 2241 case SNDRV_PCM_TRIGGER_SUSPEND: 2242 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2243 continue; 2244 2245 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2246 continue; 2247 2248 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2249 if (ret) 2250 return ret; 2251 2252 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2253 break; 2254 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2255 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2256 continue; 2257 2258 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2259 continue; 2260 2261 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2262 if (ret) 2263 return ret; 2264 2265 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2266 break; 2267 } 2268 } 2269 2270 return ret; 2271 } 2272 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2273 2274 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2275 int cmd, bool fe_first) 2276 { 2277 struct snd_soc_pcm_runtime *fe = substream->private_data; 2278 int ret; 2279 2280 /* call trigger on the frontend before the backend. */ 2281 if (fe_first) { 2282 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2283 fe->dai_link->name, cmd); 2284 2285 ret = soc_pcm_trigger(substream, cmd); 2286 if (ret < 0) 2287 return ret; 2288 2289 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2290 return ret; 2291 } 2292 2293 /* call trigger on the frontend after the backend. */ 2294 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2295 if (ret < 0) 2296 return ret; 2297 2298 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2299 fe->dai_link->name, cmd); 2300 2301 ret = soc_pcm_trigger(substream, cmd); 2302 2303 return ret; 2304 } 2305 2306 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2307 { 2308 struct snd_soc_pcm_runtime *fe = substream->private_data; 2309 int stream = substream->stream; 2310 int ret = 0; 2311 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2312 2313 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2314 2315 switch (trigger) { 2316 case SND_SOC_DPCM_TRIGGER_PRE: 2317 switch (cmd) { 2318 case SNDRV_PCM_TRIGGER_START: 2319 case SNDRV_PCM_TRIGGER_RESUME: 2320 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2321 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2322 break; 2323 case SNDRV_PCM_TRIGGER_STOP: 2324 case SNDRV_PCM_TRIGGER_SUSPEND: 2325 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2326 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2327 break; 2328 default: 2329 ret = -EINVAL; 2330 break; 2331 } 2332 break; 2333 case SND_SOC_DPCM_TRIGGER_POST: 2334 switch (cmd) { 2335 case SNDRV_PCM_TRIGGER_START: 2336 case SNDRV_PCM_TRIGGER_RESUME: 2337 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2338 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2339 break; 2340 case SNDRV_PCM_TRIGGER_STOP: 2341 case SNDRV_PCM_TRIGGER_SUSPEND: 2342 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2343 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2344 break; 2345 default: 2346 ret = -EINVAL; 2347 break; 2348 } 2349 break; 2350 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2351 /* bespoke trigger() - handles both FE and BEs */ 2352 2353 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2354 fe->dai_link->name, cmd); 2355 2356 ret = soc_pcm_bespoke_trigger(substream, cmd); 2357 break; 2358 default: 2359 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2360 fe->dai_link->name); 2361 ret = -EINVAL; 2362 goto out; 2363 } 2364 2365 if (ret < 0) { 2366 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2367 cmd, ret); 2368 goto out; 2369 } 2370 2371 switch (cmd) { 2372 case SNDRV_PCM_TRIGGER_START: 2373 case SNDRV_PCM_TRIGGER_RESUME: 2374 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2375 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2376 break; 2377 case SNDRV_PCM_TRIGGER_STOP: 2378 case SNDRV_PCM_TRIGGER_SUSPEND: 2379 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2380 break; 2381 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2382 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2383 break; 2384 } 2385 2386 out: 2387 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2388 return ret; 2389 } 2390 2391 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2392 { 2393 struct snd_soc_pcm_runtime *fe = substream->private_data; 2394 int stream = substream->stream; 2395 2396 /* if FE's runtime_update is already set, we're in race; 2397 * process this trigger later at exit 2398 */ 2399 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2400 fe->dpcm[stream].trigger_pending = cmd + 1; 2401 return 0; /* delayed, assuming it's successful */ 2402 } 2403 2404 /* we're alone, let's trigger */ 2405 return dpcm_fe_dai_do_trigger(substream, cmd); 2406 } 2407 2408 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2409 { 2410 struct snd_soc_dpcm *dpcm; 2411 int ret = 0; 2412 2413 for_each_dpcm_be(fe, stream, dpcm) { 2414 2415 struct snd_soc_pcm_runtime *be = dpcm->be; 2416 struct snd_pcm_substream *be_substream = 2417 snd_soc_dpcm_get_substream(be, stream); 2418 2419 /* is this op for this BE ? */ 2420 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2421 continue; 2422 2423 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2424 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2425 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2426 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2427 continue; 2428 2429 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2430 be->dai_link->name); 2431 2432 ret = soc_pcm_prepare(be_substream); 2433 if (ret < 0) { 2434 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2435 ret); 2436 break; 2437 } 2438 2439 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2440 } 2441 return ret; 2442 } 2443 2444 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2445 { 2446 struct snd_soc_pcm_runtime *fe = substream->private_data; 2447 int stream = substream->stream, ret = 0; 2448 2449 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2450 2451 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2452 2453 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2454 2455 /* there is no point preparing this FE if there are no BEs */ 2456 if (list_empty(&fe->dpcm[stream].be_clients)) { 2457 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2458 fe->dai_link->name); 2459 ret = -EINVAL; 2460 goto out; 2461 } 2462 2463 ret = dpcm_be_dai_prepare(fe, substream->stream); 2464 if (ret < 0) 2465 goto out; 2466 2467 /* call prepare on the frontend */ 2468 ret = soc_pcm_prepare(substream); 2469 if (ret < 0) { 2470 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2471 fe->dai_link->name); 2472 goto out; 2473 } 2474 2475 /* run the stream event for each BE */ 2476 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2477 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2478 2479 out: 2480 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2481 mutex_unlock(&fe->card->mutex); 2482 2483 return ret; 2484 } 2485 2486 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2487 { 2488 struct snd_pcm_substream *substream = 2489 snd_soc_dpcm_get_substream(fe, stream); 2490 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2491 int err; 2492 2493 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2494 stream ? "capture" : "playback", fe->dai_link->name); 2495 2496 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2497 /* call bespoke trigger - FE takes care of all BE triggers */ 2498 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2499 fe->dai_link->name); 2500 2501 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2502 if (err < 0) 2503 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2504 } else { 2505 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2506 fe->dai_link->name); 2507 2508 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2509 if (err < 0) 2510 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2511 } 2512 2513 err = dpcm_be_dai_hw_free(fe, stream); 2514 if (err < 0) 2515 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2516 2517 err = dpcm_be_dai_shutdown(fe, stream); 2518 if (err < 0) 2519 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2520 2521 /* run the stream event for each BE */ 2522 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2523 2524 return 0; 2525 } 2526 2527 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2528 { 2529 struct snd_pcm_substream *substream = 2530 snd_soc_dpcm_get_substream(fe, stream); 2531 struct snd_soc_dpcm *dpcm; 2532 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2533 int ret; 2534 unsigned long flags; 2535 2536 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2537 stream ? "capture" : "playback", fe->dai_link->name); 2538 2539 /* Only start the BE if the FE is ready */ 2540 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2541 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2542 return -EINVAL; 2543 2544 /* startup must always be called for new BEs */ 2545 ret = dpcm_be_dai_startup(fe, stream); 2546 if (ret < 0) 2547 goto disconnect; 2548 2549 /* keep going if FE state is > open */ 2550 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2551 return 0; 2552 2553 ret = dpcm_be_dai_hw_params(fe, stream); 2554 if (ret < 0) 2555 goto close; 2556 2557 /* keep going if FE state is > hw_params */ 2558 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2559 return 0; 2560 2561 2562 ret = dpcm_be_dai_prepare(fe, stream); 2563 if (ret < 0) 2564 goto hw_free; 2565 2566 /* run the stream event for each BE */ 2567 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2568 2569 /* keep going if FE state is > prepare */ 2570 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2571 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2572 return 0; 2573 2574 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2575 /* call trigger on the frontend - FE takes care of all BE triggers */ 2576 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2577 fe->dai_link->name); 2578 2579 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2580 if (ret < 0) { 2581 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2582 goto hw_free; 2583 } 2584 } else { 2585 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2586 fe->dai_link->name); 2587 2588 ret = dpcm_be_dai_trigger(fe, stream, 2589 SNDRV_PCM_TRIGGER_START); 2590 if (ret < 0) { 2591 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2592 goto hw_free; 2593 } 2594 } 2595 2596 return 0; 2597 2598 hw_free: 2599 dpcm_be_dai_hw_free(fe, stream); 2600 close: 2601 dpcm_be_dai_shutdown(fe, stream); 2602 disconnect: 2603 /* disconnect any non started BEs */ 2604 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2605 for_each_dpcm_be(fe, stream, dpcm) { 2606 struct snd_soc_pcm_runtime *be = dpcm->be; 2607 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2608 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2609 } 2610 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2611 2612 return ret; 2613 } 2614 2615 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2616 { 2617 int ret; 2618 2619 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2620 ret = dpcm_run_update_startup(fe, stream); 2621 if (ret < 0) 2622 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2623 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2624 2625 return ret; 2626 } 2627 2628 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2629 { 2630 int ret; 2631 2632 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2633 ret = dpcm_run_update_shutdown(fe, stream); 2634 if (ret < 0) 2635 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2636 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2637 2638 return ret; 2639 } 2640 2641 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2642 { 2643 struct snd_soc_dapm_widget_list *list; 2644 int count, paths; 2645 2646 if (!fe->dai_link->dynamic) 2647 return 0; 2648 2649 /* only check active links */ 2650 if (!fe->cpu_dai->active) 2651 return 0; 2652 2653 /* DAPM sync will call this to update DSP paths */ 2654 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2655 new ? "new" : "old", fe->dai_link->name); 2656 2657 /* skip if FE doesn't have playback capability */ 2658 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) || 2659 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK)) 2660 goto capture; 2661 2662 /* skip if FE isn't currently playing */ 2663 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active) 2664 goto capture; 2665 2666 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2667 if (paths < 0) { 2668 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2669 fe->dai_link->name, "playback"); 2670 return paths; 2671 } 2672 2673 /* update any playback paths */ 2674 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new); 2675 if (count) { 2676 if (new) 2677 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2678 else 2679 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2680 2681 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2682 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2683 } 2684 2685 dpcm_path_put(&list); 2686 2687 capture: 2688 /* skip if FE doesn't have capture capability */ 2689 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) || 2690 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE)) 2691 return 0; 2692 2693 /* skip if FE isn't currently capturing */ 2694 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active) 2695 return 0; 2696 2697 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2698 if (paths < 0) { 2699 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2700 fe->dai_link->name, "capture"); 2701 return paths; 2702 } 2703 2704 /* update any old capture paths */ 2705 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new); 2706 if (count) { 2707 if (new) 2708 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2709 else 2710 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2711 2712 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2713 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2714 } 2715 2716 dpcm_path_put(&list); 2717 2718 return 0; 2719 } 2720 2721 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2722 * any DAI links. 2723 */ 2724 int soc_dpcm_runtime_update(struct snd_soc_card *card) 2725 { 2726 struct snd_soc_pcm_runtime *fe; 2727 int ret = 0; 2728 2729 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2730 /* shutdown all old paths first */ 2731 for_each_card_rtds(card, fe) { 2732 ret = soc_dpcm_fe_runtime_update(fe, 0); 2733 if (ret) 2734 goto out; 2735 } 2736 2737 /* bring new paths up */ 2738 for_each_card_rtds(card, fe) { 2739 ret = soc_dpcm_fe_runtime_update(fe, 1); 2740 if (ret) 2741 goto out; 2742 } 2743 2744 out: 2745 mutex_unlock(&card->mutex); 2746 return ret; 2747 } 2748 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2749 { 2750 struct snd_soc_dpcm *dpcm; 2751 struct snd_soc_dai *dai; 2752 2753 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) { 2754 2755 struct snd_soc_pcm_runtime *be = dpcm->be; 2756 int i; 2757 2758 if (be->dai_link->ignore_suspend) 2759 continue; 2760 2761 for_each_rtd_codec_dai(be, i, dai) { 2762 struct snd_soc_dai_driver *drv = dai->driver; 2763 2764 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2765 be->dai_link->name); 2766 2767 if (drv->ops && drv->ops->digital_mute && 2768 dai->playback_active) 2769 drv->ops->digital_mute(dai, mute); 2770 } 2771 } 2772 2773 return 0; 2774 } 2775 2776 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2777 { 2778 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2779 struct snd_soc_dpcm *dpcm; 2780 struct snd_soc_dapm_widget_list *list; 2781 int ret; 2782 int stream = fe_substream->stream; 2783 2784 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2785 fe->dpcm[stream].runtime = fe_substream->runtime; 2786 2787 ret = dpcm_path_get(fe, stream, &list); 2788 if (ret < 0) { 2789 mutex_unlock(&fe->card->mutex); 2790 return ret; 2791 } else if (ret == 0) { 2792 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2793 fe->dai_link->name, stream ? "capture" : "playback"); 2794 } 2795 2796 /* calculate valid and active FE <-> BE dpcms */ 2797 dpcm_process_paths(fe, stream, &list, 1); 2798 2799 ret = dpcm_fe_dai_startup(fe_substream); 2800 if (ret < 0) { 2801 /* clean up all links */ 2802 for_each_dpcm_be(fe, stream, dpcm) 2803 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2804 2805 dpcm_be_disconnect(fe, stream); 2806 fe->dpcm[stream].runtime = NULL; 2807 } 2808 2809 dpcm_clear_pending_state(fe, stream); 2810 dpcm_path_put(&list); 2811 mutex_unlock(&fe->card->mutex); 2812 return ret; 2813 } 2814 2815 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2816 { 2817 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2818 struct snd_soc_dpcm *dpcm; 2819 int stream = fe_substream->stream, ret; 2820 2821 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2822 ret = dpcm_fe_dai_shutdown(fe_substream); 2823 2824 /* mark FE's links ready to prune */ 2825 for_each_dpcm_be(fe, stream, dpcm) 2826 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2827 2828 dpcm_be_disconnect(fe, stream); 2829 2830 fe->dpcm[stream].runtime = NULL; 2831 mutex_unlock(&fe->card->mutex); 2832 return ret; 2833 } 2834 2835 /* create a new pcm */ 2836 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2837 { 2838 struct snd_soc_dai *codec_dai; 2839 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2840 struct snd_soc_component *component; 2841 struct snd_pcm *pcm; 2842 char new_name[64]; 2843 int ret = 0, playback = 0, capture = 0; 2844 int i; 2845 2846 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2847 playback = rtd->dai_link->dpcm_playback; 2848 capture = rtd->dai_link->dpcm_capture; 2849 } else { 2850 /* Adapt stream for codec2codec links */ 2851 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ? 2852 &cpu_dai->driver->playback : &cpu_dai->driver->capture; 2853 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ? 2854 &cpu_dai->driver->capture : &cpu_dai->driver->playback; 2855 2856 for_each_rtd_codec_dai(rtd, i, codec_dai) { 2857 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2858 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK)) 2859 playback = 1; 2860 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2861 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE)) 2862 capture = 1; 2863 } 2864 2865 capture = capture && cpu_capture->channels_min; 2866 playback = playback && cpu_playback->channels_min; 2867 } 2868 2869 if (rtd->dai_link->playback_only) { 2870 playback = 1; 2871 capture = 0; 2872 } 2873 2874 if (rtd->dai_link->capture_only) { 2875 playback = 0; 2876 capture = 1; 2877 } 2878 2879 /* create the PCM */ 2880 if (rtd->dai_link->params) { 2881 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2882 rtd->dai_link->stream_name); 2883 2884 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2885 playback, capture, &pcm); 2886 } else if (rtd->dai_link->no_pcm) { 2887 snprintf(new_name, sizeof(new_name), "(%s)", 2888 rtd->dai_link->stream_name); 2889 2890 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2891 playback, capture, &pcm); 2892 } else { 2893 if (rtd->dai_link->dynamic) 2894 snprintf(new_name, sizeof(new_name), "%s (*)", 2895 rtd->dai_link->stream_name); 2896 else 2897 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2898 rtd->dai_link->stream_name, 2899 (rtd->num_codecs > 1) ? 2900 "multicodec" : rtd->codec_dai->name, num); 2901 2902 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2903 capture, &pcm); 2904 } 2905 if (ret < 0) { 2906 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2907 rtd->dai_link->name); 2908 return ret; 2909 } 2910 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2911 2912 /* DAPM dai link stream work */ 2913 if (rtd->dai_link->params) 2914 rtd->close_delayed_work_func = codec2codec_close_delayed_work; 2915 else 2916 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2917 2918 pcm->nonatomic = rtd->dai_link->nonatomic; 2919 rtd->pcm = pcm; 2920 pcm->private_data = rtd; 2921 2922 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2923 if (playback) 2924 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2925 if (capture) 2926 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2927 goto out; 2928 } 2929 2930 /* ASoC PCM operations */ 2931 if (rtd->dai_link->dynamic) { 2932 rtd->ops.open = dpcm_fe_dai_open; 2933 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2934 rtd->ops.prepare = dpcm_fe_dai_prepare; 2935 rtd->ops.trigger = dpcm_fe_dai_trigger; 2936 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2937 rtd->ops.close = dpcm_fe_dai_close; 2938 rtd->ops.pointer = soc_pcm_pointer; 2939 } else { 2940 rtd->ops.open = soc_pcm_open; 2941 rtd->ops.hw_params = soc_pcm_hw_params; 2942 rtd->ops.prepare = soc_pcm_prepare; 2943 rtd->ops.trigger = soc_pcm_trigger; 2944 rtd->ops.hw_free = soc_pcm_hw_free; 2945 rtd->ops.close = soc_pcm_close; 2946 rtd->ops.pointer = soc_pcm_pointer; 2947 } 2948 2949 for_each_rtd_components(rtd, i, component) { 2950 const struct snd_soc_component_driver *drv = component->driver; 2951 2952 if (drv->ioctl) 2953 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2954 if (drv->sync_stop) 2955 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2956 if (drv->copy_user) 2957 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2958 if (drv->page) 2959 rtd->ops.page = snd_soc_pcm_component_page; 2960 if (drv->mmap) 2961 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2962 } 2963 2964 if (playback) 2965 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2966 2967 if (capture) 2968 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2969 2970 ret = snd_soc_pcm_component_new(rtd); 2971 if (ret < 0) { 2972 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret); 2973 return ret; 2974 } 2975 2976 pcm->no_device_suspend = true; 2977 out: 2978 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 2979 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 2980 cpu_dai->name); 2981 return ret; 2982 } 2983 2984 /* is the current PCM operation for this FE ? */ 2985 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2986 { 2987 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2988 return 1; 2989 return 0; 2990 } 2991 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2992 2993 /* is the current PCM operation for this BE ? */ 2994 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2995 struct snd_soc_pcm_runtime *be, int stream) 2996 { 2997 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2998 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2999 be->dpcm[stream].runtime_update)) 3000 return 1; 3001 return 0; 3002 } 3003 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 3004 3005 /* get the substream for this BE */ 3006 struct snd_pcm_substream * 3007 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3008 { 3009 return be->pcm->streams[stream].substream; 3010 } 3011 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3012 3013 /* get the BE runtime state */ 3014 enum snd_soc_dpcm_state 3015 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 3016 { 3017 return be->dpcm[stream].state; 3018 } 3019 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 3020 3021 /* set the BE runtime state */ 3022 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 3023 int stream, enum snd_soc_dpcm_state state) 3024 { 3025 be->dpcm[stream].state = state; 3026 } 3027 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 3028 3029 /* 3030 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3031 * are not running, paused or suspended for the specified stream direction. 3032 */ 3033 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3034 struct snd_soc_pcm_runtime *be, int stream) 3035 { 3036 struct snd_soc_dpcm *dpcm; 3037 int state; 3038 int ret = 1; 3039 unsigned long flags; 3040 3041 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3042 for_each_dpcm_fe(be, stream, dpcm) { 3043 3044 if (dpcm->fe == fe) 3045 continue; 3046 3047 state = dpcm->fe->dpcm[stream].state; 3048 if (state == SND_SOC_DPCM_STATE_START || 3049 state == SND_SOC_DPCM_STATE_PAUSED || 3050 state == SND_SOC_DPCM_STATE_SUSPEND) { 3051 ret = 0; 3052 break; 3053 } 3054 } 3055 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3056 3057 /* it's safe to free/stop this BE DAI */ 3058 return ret; 3059 } 3060 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3061 3062 /* 3063 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3064 * running, paused or suspended for the specified stream direction. 3065 */ 3066 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3067 struct snd_soc_pcm_runtime *be, int stream) 3068 { 3069 struct snd_soc_dpcm *dpcm; 3070 int state; 3071 int ret = 1; 3072 unsigned long flags; 3073 3074 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3075 for_each_dpcm_fe(be, stream, dpcm) { 3076 3077 if (dpcm->fe == fe) 3078 continue; 3079 3080 state = dpcm->fe->dpcm[stream].state; 3081 if (state == SND_SOC_DPCM_STATE_START || 3082 state == SND_SOC_DPCM_STATE_PAUSED || 3083 state == SND_SOC_DPCM_STATE_SUSPEND || 3084 state == SND_SOC_DPCM_STATE_PREPARE) { 3085 ret = 0; 3086 break; 3087 } 3088 } 3089 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3090 3091 /* it's safe to change hw_params */ 3092 return ret; 3093 } 3094 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3095 3096 #ifdef CONFIG_DEBUG_FS 3097 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 3098 { 3099 switch (state) { 3100 case SND_SOC_DPCM_STATE_NEW: 3101 return "new"; 3102 case SND_SOC_DPCM_STATE_OPEN: 3103 return "open"; 3104 case SND_SOC_DPCM_STATE_HW_PARAMS: 3105 return "hw_params"; 3106 case SND_SOC_DPCM_STATE_PREPARE: 3107 return "prepare"; 3108 case SND_SOC_DPCM_STATE_START: 3109 return "start"; 3110 case SND_SOC_DPCM_STATE_STOP: 3111 return "stop"; 3112 case SND_SOC_DPCM_STATE_SUSPEND: 3113 return "suspend"; 3114 case SND_SOC_DPCM_STATE_PAUSED: 3115 return "paused"; 3116 case SND_SOC_DPCM_STATE_HW_FREE: 3117 return "hw_free"; 3118 case SND_SOC_DPCM_STATE_CLOSE: 3119 return "close"; 3120 } 3121 3122 return "unknown"; 3123 } 3124 3125 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 3126 int stream, char *buf, size_t size) 3127 { 3128 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 3129 struct snd_soc_dpcm *dpcm; 3130 ssize_t offset = 0; 3131 unsigned long flags; 3132 3133 /* FE state */ 3134 offset += snprintf(buf + offset, size - offset, 3135 "[%s - %s]\n", fe->dai_link->name, 3136 stream ? "Capture" : "Playback"); 3137 3138 offset += snprintf(buf + offset, size - offset, "State: %s\n", 3139 dpcm_state_string(fe->dpcm[stream].state)); 3140 3141 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3142 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3143 offset += snprintf(buf + offset, size - offset, 3144 "Hardware Params: " 3145 "Format = %s, Channels = %d, Rate = %d\n", 3146 snd_pcm_format_name(params_format(params)), 3147 params_channels(params), 3148 params_rate(params)); 3149 3150 /* BEs state */ 3151 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 3152 3153 if (list_empty(&fe->dpcm[stream].be_clients)) { 3154 offset += snprintf(buf + offset, size - offset, 3155 " No active DSP links\n"); 3156 goto out; 3157 } 3158 3159 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3160 for_each_dpcm_be(fe, stream, dpcm) { 3161 struct snd_soc_pcm_runtime *be = dpcm->be; 3162 params = &dpcm->hw_params; 3163 3164 offset += snprintf(buf + offset, size - offset, 3165 "- %s\n", be->dai_link->name); 3166 3167 offset += snprintf(buf + offset, size - offset, 3168 " State: %s\n", 3169 dpcm_state_string(be->dpcm[stream].state)); 3170 3171 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3172 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3173 offset += snprintf(buf + offset, size - offset, 3174 " Hardware Params: " 3175 "Format = %s, Channels = %d, Rate = %d\n", 3176 snd_pcm_format_name(params_format(params)), 3177 params_channels(params), 3178 params_rate(params)); 3179 } 3180 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3181 out: 3182 return offset; 3183 } 3184 3185 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 3186 size_t count, loff_t *ppos) 3187 { 3188 struct snd_soc_pcm_runtime *fe = file->private_data; 3189 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 3190 char *buf; 3191 3192 buf = kmalloc(out_count, GFP_KERNEL); 3193 if (!buf) 3194 return -ENOMEM; 3195 3196 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK)) 3197 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 3198 buf + offset, out_count - offset); 3199 3200 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE)) 3201 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 3202 buf + offset, out_count - offset); 3203 3204 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 3205 3206 kfree(buf); 3207 return ret; 3208 } 3209 3210 static const struct file_operations dpcm_state_fops = { 3211 .open = simple_open, 3212 .read = dpcm_state_read_file, 3213 .llseek = default_llseek, 3214 }; 3215 3216 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 3217 { 3218 if (!rtd->dai_link) 3219 return; 3220 3221 if (!rtd->dai_link->dynamic) 3222 return; 3223 3224 if (!rtd->card->debugfs_card_root) 3225 return; 3226 3227 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 3228 rtd->card->debugfs_card_root); 3229 3230 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 3231 rtd, &dpcm_state_fops); 3232 } 3233 #endif 3234