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