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 ret = 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 ret = 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 char *name; 1150 1151 /* only add new dpcms */ 1152 for_each_dpcm_be(fe, stream, dpcm) { 1153 if (dpcm->be == be && dpcm->fe == fe) 1154 return 0; 1155 } 1156 1157 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1158 if (!dpcm) 1159 return -ENOMEM; 1160 1161 dpcm->be = be; 1162 dpcm->fe = fe; 1163 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1164 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1165 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1166 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1167 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1168 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1169 1170 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1171 stream ? "capture" : "playback", fe->dai_link->name, 1172 stream ? "<-" : "->", be->dai_link->name); 1173 1174 #ifdef CONFIG_DEBUG_FS 1175 name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name, 1176 stream ? "capture" : "playback"); 1177 if (name) { 1178 dpcm->debugfs_state = debugfs_create_dir(name, 1179 fe->debugfs_dpcm_root); 1180 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 1181 &dpcm->state); 1182 kfree(name); 1183 } 1184 #endif 1185 return 1; 1186 } 1187 1188 /* reparent a BE onto another FE */ 1189 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1190 struct snd_soc_pcm_runtime *be, int stream) 1191 { 1192 struct snd_soc_dpcm *dpcm; 1193 struct snd_pcm_substream *fe_substream, *be_substream; 1194 1195 /* reparent if BE is connected to other FEs */ 1196 if (!be->dpcm[stream].users) 1197 return; 1198 1199 be_substream = snd_soc_dpcm_get_substream(be, stream); 1200 1201 for_each_dpcm_fe(be, stream, dpcm) { 1202 if (dpcm->fe == fe) 1203 continue; 1204 1205 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1206 stream ? "capture" : "playback", 1207 dpcm->fe->dai_link->name, 1208 stream ? "<-" : "->", dpcm->be->dai_link->name); 1209 1210 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1211 be_substream->runtime = fe_substream->runtime; 1212 break; 1213 } 1214 } 1215 1216 /* disconnect a BE and FE */ 1217 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1218 { 1219 struct snd_soc_dpcm *dpcm, *d; 1220 unsigned long flags; 1221 1222 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1223 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1224 stream ? "capture" : "playback", 1225 dpcm->be->dai_link->name); 1226 1227 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1228 continue; 1229 1230 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1231 stream ? "capture" : "playback", fe->dai_link->name, 1232 stream ? "<-" : "->", dpcm->be->dai_link->name); 1233 1234 /* BEs still alive need new FE */ 1235 dpcm_be_reparent(fe, dpcm->be, stream); 1236 1237 #ifdef CONFIG_DEBUG_FS 1238 debugfs_remove_recursive(dpcm->debugfs_state); 1239 #endif 1240 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1241 list_del(&dpcm->list_be); 1242 list_del(&dpcm->list_fe); 1243 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1244 kfree(dpcm); 1245 } 1246 } 1247 1248 /* get BE for DAI widget and stream */ 1249 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1250 struct snd_soc_dapm_widget *widget, int stream) 1251 { 1252 struct snd_soc_pcm_runtime *be; 1253 struct snd_soc_dai *dai; 1254 int i; 1255 1256 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1257 1258 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1259 for_each_card_rtds(card, be) { 1260 1261 if (!be->dai_link->no_pcm) 1262 continue; 1263 1264 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1265 be->cpu_dai->playback_widget ? 1266 be->cpu_dai->playback_widget->name : "(not set)"); 1267 1268 if (be->cpu_dai->playback_widget == widget) 1269 return be; 1270 1271 for_each_rtd_codec_dai(be, i, dai) { 1272 if (dai->playback_widget == widget) 1273 return be; 1274 } 1275 } 1276 } else { 1277 1278 for_each_card_rtds(card, be) { 1279 1280 if (!be->dai_link->no_pcm) 1281 continue; 1282 1283 dev_dbg(card->dev, "ASoC: try BE %s\n", 1284 be->cpu_dai->capture_widget ? 1285 be->cpu_dai->capture_widget->name : "(not set)"); 1286 1287 if (be->cpu_dai->capture_widget == widget) 1288 return be; 1289 1290 for_each_rtd_codec_dai(be, i, dai) { 1291 if (dai->capture_widget == widget) 1292 return be; 1293 } 1294 } 1295 } 1296 1297 /* dai link name and stream name set correctly ? */ 1298 dev_err(card->dev, "ASoC: can't get %s BE for %s\n", 1299 stream ? "capture" : "playback", widget->name); 1300 return NULL; 1301 } 1302 1303 static inline struct snd_soc_dapm_widget * 1304 dai_get_widget(struct snd_soc_dai *dai, int stream) 1305 { 1306 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1307 return dai->playback_widget; 1308 else 1309 return dai->capture_widget; 1310 } 1311 1312 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1313 struct snd_soc_dapm_widget *widget) 1314 { 1315 int i; 1316 1317 for (i = 0; i < list->num_widgets; i++) { 1318 if (widget == list->widgets[i]) 1319 return 1; 1320 } 1321 1322 return 0; 1323 } 1324 1325 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, 1326 enum snd_soc_dapm_direction dir) 1327 { 1328 struct snd_soc_card *card = widget->dapm->card; 1329 struct snd_soc_pcm_runtime *rtd; 1330 struct snd_soc_dai *dai; 1331 int i; 1332 1333 if (dir == SND_SOC_DAPM_DIR_OUT) { 1334 for_each_card_rtds(card, rtd) { 1335 if (!rtd->dai_link->no_pcm) 1336 continue; 1337 1338 if (rtd->cpu_dai->playback_widget == widget) 1339 return true; 1340 1341 for_each_rtd_codec_dai(rtd, i, dai) { 1342 if (dai->playback_widget == widget) 1343 return true; 1344 } 1345 } 1346 } else { /* SND_SOC_DAPM_DIR_IN */ 1347 for_each_card_rtds(card, rtd) { 1348 if (!rtd->dai_link->no_pcm) 1349 continue; 1350 1351 if (rtd->cpu_dai->capture_widget == widget) 1352 return true; 1353 1354 for_each_rtd_codec_dai(rtd, i, dai) { 1355 if (dai->capture_widget == widget) 1356 return true; 1357 } 1358 } 1359 } 1360 1361 return false; 1362 } 1363 1364 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1365 int stream, struct snd_soc_dapm_widget_list **list) 1366 { 1367 struct snd_soc_dai *cpu_dai = fe->cpu_dai; 1368 int paths; 1369 1370 /* get number of valid DAI paths and their widgets */ 1371 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1372 dpcm_end_walk_at_be); 1373 1374 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1375 stream ? "capture" : "playback"); 1376 1377 return paths; 1378 } 1379 1380 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1381 struct snd_soc_dapm_widget_list **list_) 1382 { 1383 struct snd_soc_dpcm *dpcm; 1384 struct snd_soc_dapm_widget_list *list = *list_; 1385 struct snd_soc_dapm_widget *widget; 1386 struct snd_soc_dai *dai; 1387 int prune = 0; 1388 1389 /* Destroy any old FE <--> BE connections */ 1390 for_each_dpcm_be(fe, stream, dpcm) { 1391 unsigned int i; 1392 1393 /* is there a valid CPU DAI widget for this BE */ 1394 widget = dai_get_widget(dpcm->be->cpu_dai, stream); 1395 1396 /* prune the BE if it's no longer in our active list */ 1397 if (widget && widget_in_list(list, widget)) 1398 continue; 1399 1400 /* is there a valid CODEC DAI widget for this BE */ 1401 for_each_rtd_codec_dai(dpcm->be, i, dai) { 1402 widget = dai_get_widget(dai, stream); 1403 1404 /* prune the BE if it's no longer in our active list */ 1405 if (widget && widget_in_list(list, widget)) 1406 continue; 1407 } 1408 1409 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1410 stream ? "capture" : "playback", 1411 dpcm->be->dai_link->name, fe->dai_link->name); 1412 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1413 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1414 prune++; 1415 } 1416 1417 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1418 return prune; 1419 } 1420 1421 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1422 struct snd_soc_dapm_widget_list **list_) 1423 { 1424 struct snd_soc_card *card = fe->card; 1425 struct snd_soc_dapm_widget_list *list = *list_; 1426 struct snd_soc_pcm_runtime *be; 1427 int i, new = 0, err; 1428 1429 /* Create any new FE <--> BE connections */ 1430 for (i = 0; i < list->num_widgets; i++) { 1431 1432 switch (list->widgets[i]->id) { 1433 case snd_soc_dapm_dai_in: 1434 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1435 continue; 1436 break; 1437 case snd_soc_dapm_dai_out: 1438 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1439 continue; 1440 break; 1441 default: 1442 continue; 1443 } 1444 1445 /* is there a valid BE rtd for this widget */ 1446 be = dpcm_get_be(card, list->widgets[i], stream); 1447 if (!be) { 1448 dev_err(fe->dev, "ASoC: no BE found for %s\n", 1449 list->widgets[i]->name); 1450 continue; 1451 } 1452 1453 /* make sure BE is a real BE */ 1454 if (!be->dai_link->no_pcm) 1455 continue; 1456 1457 /* don't connect if FE is not running */ 1458 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1459 continue; 1460 1461 /* newly connected FE and BE */ 1462 err = dpcm_be_connect(fe, be, stream); 1463 if (err < 0) { 1464 dev_err(fe->dev, "ASoC: can't connect %s\n", 1465 list->widgets[i]->name); 1466 break; 1467 } else if (err == 0) /* already connected */ 1468 continue; 1469 1470 /* new */ 1471 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1472 new++; 1473 } 1474 1475 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1476 return new; 1477 } 1478 1479 /* 1480 * Find the corresponding BE DAIs that source or sink audio to this 1481 * FE substream. 1482 */ 1483 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1484 int stream, struct snd_soc_dapm_widget_list **list, int new) 1485 { 1486 if (new) 1487 return dpcm_add_paths(fe, stream, list); 1488 else 1489 return dpcm_prune_paths(fe, stream, list); 1490 } 1491 1492 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1493 { 1494 struct snd_soc_dpcm *dpcm; 1495 unsigned long flags; 1496 1497 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1498 for_each_dpcm_be(fe, stream, dpcm) 1499 dpcm->be->dpcm[stream].runtime_update = 1500 SND_SOC_DPCM_UPDATE_NO; 1501 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1502 } 1503 1504 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1505 int stream) 1506 { 1507 struct snd_soc_dpcm *dpcm; 1508 1509 /* disable any enabled and non active backends */ 1510 for_each_dpcm_be(fe, stream, dpcm) { 1511 1512 struct snd_soc_pcm_runtime *be = dpcm->be; 1513 struct snd_pcm_substream *be_substream = 1514 snd_soc_dpcm_get_substream(be, stream); 1515 1516 if (be->dpcm[stream].users == 0) 1517 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1518 stream ? "capture" : "playback", 1519 be->dpcm[stream].state); 1520 1521 if (--be->dpcm[stream].users != 0) 1522 continue; 1523 1524 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1525 continue; 1526 1527 soc_pcm_close(be_substream); 1528 be_substream->runtime = NULL; 1529 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1530 } 1531 } 1532 1533 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1534 { 1535 struct snd_soc_dpcm *dpcm; 1536 int err, count = 0; 1537 1538 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1539 for_each_dpcm_be(fe, stream, dpcm) { 1540 1541 struct snd_soc_pcm_runtime *be = dpcm->be; 1542 struct snd_pcm_substream *be_substream = 1543 snd_soc_dpcm_get_substream(be, stream); 1544 1545 if (!be_substream) { 1546 dev_err(be->dev, "ASoC: no backend %s stream\n", 1547 stream ? "capture" : "playback"); 1548 continue; 1549 } 1550 1551 /* is this op for this BE ? */ 1552 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1553 continue; 1554 1555 /* first time the dpcm is open ? */ 1556 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1557 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1558 stream ? "capture" : "playback", 1559 be->dpcm[stream].state); 1560 1561 if (be->dpcm[stream].users++ != 0) 1562 continue; 1563 1564 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1565 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1566 continue; 1567 1568 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1569 stream ? "capture" : "playback", be->dai_link->name); 1570 1571 be_substream->runtime = be->dpcm[stream].runtime; 1572 err = soc_pcm_open(be_substream); 1573 if (err < 0) { 1574 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1575 be->dpcm[stream].users--; 1576 if (be->dpcm[stream].users < 0) 1577 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1578 stream ? "capture" : "playback", 1579 be->dpcm[stream].state); 1580 1581 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1582 goto unwind; 1583 } 1584 1585 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1586 count++; 1587 } 1588 1589 return count; 1590 1591 unwind: 1592 /* disable any enabled and non active backends */ 1593 for_each_dpcm_be_rollback(fe, stream, dpcm) { 1594 struct snd_soc_pcm_runtime *be = dpcm->be; 1595 struct snd_pcm_substream *be_substream = 1596 snd_soc_dpcm_get_substream(be, stream); 1597 1598 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1599 continue; 1600 1601 if (be->dpcm[stream].users == 0) 1602 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1603 stream ? "capture" : "playback", 1604 be->dpcm[stream].state); 1605 1606 if (--be->dpcm[stream].users != 0) 1607 continue; 1608 1609 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1610 continue; 1611 1612 soc_pcm_close(be_substream); 1613 be_substream->runtime = NULL; 1614 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1615 } 1616 1617 return err; 1618 } 1619 1620 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 1621 struct snd_soc_pcm_stream *stream) 1622 { 1623 runtime->hw.rate_min = stream->rate_min; 1624 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX); 1625 runtime->hw.channels_min = stream->channels_min; 1626 runtime->hw.channels_max = stream->channels_max; 1627 if (runtime->hw.formats) 1628 runtime->hw.formats &= stream->formats; 1629 else 1630 runtime->hw.formats = stream->formats; 1631 runtime->hw.rates = stream->rates; 1632 } 1633 1634 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream, 1635 u64 *formats) 1636 { 1637 struct snd_soc_pcm_runtime *fe = substream->private_data; 1638 struct snd_soc_dpcm *dpcm; 1639 struct snd_soc_dai *dai; 1640 int stream = substream->stream; 1641 1642 if (!fe->dai_link->dpcm_merged_format) 1643 return; 1644 1645 /* 1646 * It returns merged BE codec format 1647 * if FE want to use it (= dpcm_merged_format) 1648 */ 1649 1650 for_each_dpcm_be(fe, stream, dpcm) { 1651 struct snd_soc_pcm_runtime *be = dpcm->be; 1652 struct snd_soc_dai_driver *codec_dai_drv; 1653 struct snd_soc_pcm_stream *codec_stream; 1654 int i; 1655 1656 for_each_rtd_codec_dai(be, i, dai) { 1657 /* 1658 * Skip CODECs which don't support the current stream 1659 * type. See soc_pcm_init_runtime_hw() for more details 1660 */ 1661 if (!snd_soc_dai_stream_valid(dai, stream)) 1662 continue; 1663 1664 codec_dai_drv = dai->driver; 1665 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1666 codec_stream = &codec_dai_drv->playback; 1667 else 1668 codec_stream = &codec_dai_drv->capture; 1669 1670 *formats &= codec_stream->formats; 1671 } 1672 } 1673 } 1674 1675 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream, 1676 unsigned int *channels_min, 1677 unsigned int *channels_max) 1678 { 1679 struct snd_soc_pcm_runtime *fe = substream->private_data; 1680 struct snd_soc_dpcm *dpcm; 1681 int stream = substream->stream; 1682 1683 if (!fe->dai_link->dpcm_merged_chan) 1684 return; 1685 1686 /* 1687 * It returns merged BE codec channel; 1688 * if FE want to use it (= dpcm_merged_chan) 1689 */ 1690 1691 for_each_dpcm_be(fe, stream, dpcm) { 1692 struct snd_soc_pcm_runtime *be = dpcm->be; 1693 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver; 1694 struct snd_soc_dai_driver *codec_dai_drv; 1695 struct snd_soc_pcm_stream *codec_stream; 1696 struct snd_soc_pcm_stream *cpu_stream; 1697 1698 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1699 cpu_stream = &cpu_dai_drv->playback; 1700 else 1701 cpu_stream = &cpu_dai_drv->capture; 1702 1703 *channels_min = max(*channels_min, cpu_stream->channels_min); 1704 *channels_max = min(*channels_max, cpu_stream->channels_max); 1705 1706 /* 1707 * chan min/max cannot be enforced if there are multiple CODEC 1708 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1709 */ 1710 if (be->num_codecs == 1) { 1711 codec_dai_drv = be->codec_dais[0]->driver; 1712 1713 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1714 codec_stream = &codec_dai_drv->playback; 1715 else 1716 codec_stream = &codec_dai_drv->capture; 1717 1718 *channels_min = max(*channels_min, 1719 codec_stream->channels_min); 1720 *channels_max = min(*channels_max, 1721 codec_stream->channels_max); 1722 } 1723 } 1724 } 1725 1726 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream, 1727 unsigned int *rates, 1728 unsigned int *rate_min, 1729 unsigned int *rate_max) 1730 { 1731 struct snd_soc_pcm_runtime *fe = substream->private_data; 1732 struct snd_soc_dpcm *dpcm; 1733 int stream = substream->stream; 1734 1735 if (!fe->dai_link->dpcm_merged_rate) 1736 return; 1737 1738 /* 1739 * It returns merged BE codec channel; 1740 * if FE want to use it (= dpcm_merged_chan) 1741 */ 1742 1743 for_each_dpcm_be(fe, stream, dpcm) { 1744 struct snd_soc_pcm_runtime *be = dpcm->be; 1745 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver; 1746 struct snd_soc_dai_driver *codec_dai_drv; 1747 struct snd_soc_pcm_stream *codec_stream; 1748 struct snd_soc_pcm_stream *cpu_stream; 1749 struct snd_soc_dai *dai; 1750 int i; 1751 1752 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1753 cpu_stream = &cpu_dai_drv->playback; 1754 else 1755 cpu_stream = &cpu_dai_drv->capture; 1756 1757 *rate_min = max(*rate_min, cpu_stream->rate_min); 1758 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max); 1759 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates); 1760 1761 for_each_rtd_codec_dai(be, i, dai) { 1762 /* 1763 * Skip CODECs which don't support the current stream 1764 * type. See soc_pcm_init_runtime_hw() for more details 1765 */ 1766 if (!snd_soc_dai_stream_valid(dai, stream)) 1767 continue; 1768 1769 codec_dai_drv = dai->driver; 1770 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1771 codec_stream = &codec_dai_drv->playback; 1772 else 1773 codec_stream = &codec_dai_drv->capture; 1774 1775 *rate_min = max(*rate_min, codec_stream->rate_min); 1776 *rate_max = min_not_zero(*rate_max, 1777 codec_stream->rate_max); 1778 *rates = snd_pcm_rate_mask_intersect(*rates, 1779 codec_stream->rates); 1780 } 1781 } 1782 } 1783 1784 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1785 { 1786 struct snd_pcm_runtime *runtime = substream->runtime; 1787 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1788 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1789 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 1790 1791 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1792 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback); 1793 else 1794 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture); 1795 1796 dpcm_runtime_merge_format(substream, &runtime->hw.formats); 1797 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min, 1798 &runtime->hw.channels_max); 1799 dpcm_runtime_merge_rate(substream, &runtime->hw.rates, 1800 &runtime->hw.rate_min, &runtime->hw.rate_max); 1801 } 1802 1803 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 1804 1805 /* Set FE's runtime_update state; the state is protected via PCM stream lock 1806 * for avoiding the race with trigger callback. 1807 * If the state is unset and a trigger is pending while the previous operation, 1808 * process the pending trigger action here. 1809 */ 1810 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 1811 int stream, enum snd_soc_dpcm_update state) 1812 { 1813 struct snd_pcm_substream *substream = 1814 snd_soc_dpcm_get_substream(fe, stream); 1815 1816 snd_pcm_stream_lock_irq(substream); 1817 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 1818 dpcm_fe_dai_do_trigger(substream, 1819 fe->dpcm[stream].trigger_pending - 1); 1820 fe->dpcm[stream].trigger_pending = 0; 1821 } 1822 fe->dpcm[stream].runtime_update = state; 1823 snd_pcm_stream_unlock_irq(substream); 1824 } 1825 1826 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1827 int stream) 1828 { 1829 struct snd_soc_dpcm *dpcm; 1830 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1831 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai; 1832 int err; 1833 1834 /* apply symmetry for FE */ 1835 if (soc_pcm_has_symmetry(fe_substream)) 1836 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1837 1838 /* Symmetry only applies if we've got an active stream. */ 1839 if (fe_cpu_dai->active) { 1840 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1841 if (err < 0) 1842 return err; 1843 } 1844 1845 /* apply symmetry for BE */ 1846 for_each_dpcm_be(fe, stream, dpcm) { 1847 struct snd_soc_pcm_runtime *be = dpcm->be; 1848 struct snd_pcm_substream *be_substream = 1849 snd_soc_dpcm_get_substream(be, stream); 1850 struct snd_soc_pcm_runtime *rtd; 1851 struct snd_soc_dai *codec_dai; 1852 int i; 1853 1854 /* A backend may not have the requested substream */ 1855 if (!be_substream) 1856 continue; 1857 1858 rtd = be_substream->private_data; 1859 if (rtd->dai_link->be_hw_params_fixup) 1860 continue; 1861 1862 if (soc_pcm_has_symmetry(be_substream)) 1863 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1864 1865 /* Symmetry only applies if we've got an active stream. */ 1866 if (rtd->cpu_dai->active) { 1867 err = soc_pcm_apply_symmetry(fe_substream, 1868 rtd->cpu_dai); 1869 if (err < 0) 1870 return err; 1871 } 1872 1873 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1874 if (codec_dai->active) { 1875 err = soc_pcm_apply_symmetry(fe_substream, 1876 codec_dai); 1877 if (err < 0) 1878 return err; 1879 } 1880 } 1881 } 1882 1883 return 0; 1884 } 1885 1886 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1887 { 1888 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1889 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1890 int stream = fe_substream->stream, ret = 0; 1891 1892 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1893 1894 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1895 if (ret < 0) { 1896 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1897 goto be_err; 1898 } 1899 1900 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1901 1902 /* start the DAI frontend */ 1903 ret = soc_pcm_open(fe_substream); 1904 if (ret < 0) { 1905 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 1906 goto unwind; 1907 } 1908 1909 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1910 1911 dpcm_set_fe_runtime(fe_substream); 1912 snd_pcm_limit_hw_rates(runtime); 1913 1914 ret = dpcm_apply_symmetry(fe_substream, stream); 1915 if (ret < 0) { 1916 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n", 1917 ret); 1918 goto unwind; 1919 } 1920 1921 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1922 return 0; 1923 1924 unwind: 1925 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1926 be_err: 1927 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1928 return ret; 1929 } 1930 1931 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1932 { 1933 struct snd_soc_dpcm *dpcm; 1934 1935 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 1936 for_each_dpcm_be(fe, stream, dpcm) { 1937 1938 struct snd_soc_pcm_runtime *be = dpcm->be; 1939 struct snd_pcm_substream *be_substream = 1940 snd_soc_dpcm_get_substream(be, stream); 1941 1942 /* is this op for this BE ? */ 1943 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1944 continue; 1945 1946 if (be->dpcm[stream].users == 0) 1947 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1948 stream ? "capture" : "playback", 1949 be->dpcm[stream].state); 1950 1951 if (--be->dpcm[stream].users != 0) 1952 continue; 1953 1954 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1955 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) { 1956 soc_pcm_hw_free(be_substream); 1957 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1958 } 1959 1960 dev_dbg(be->dev, "ASoC: close BE %s\n", 1961 be->dai_link->name); 1962 1963 soc_pcm_close(be_substream); 1964 be_substream->runtime = NULL; 1965 1966 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1967 } 1968 return 0; 1969 } 1970 1971 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1972 { 1973 struct snd_soc_pcm_runtime *fe = substream->private_data; 1974 int stream = substream->stream; 1975 1976 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1977 1978 /* shutdown the BEs */ 1979 dpcm_be_dai_shutdown(fe, substream->stream); 1980 1981 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1982 1983 /* now shutdown the frontend */ 1984 soc_pcm_close(substream); 1985 1986 /* run the stream event for each BE */ 1987 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1988 1989 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1990 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1991 return 0; 1992 } 1993 1994 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1995 { 1996 struct snd_soc_dpcm *dpcm; 1997 1998 /* only hw_params backends that are either sinks or sources 1999 * to this frontend DAI */ 2000 for_each_dpcm_be(fe, stream, dpcm) { 2001 2002 struct snd_soc_pcm_runtime *be = dpcm->be; 2003 struct snd_pcm_substream *be_substream = 2004 snd_soc_dpcm_get_substream(be, stream); 2005 2006 /* is this op for this BE ? */ 2007 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2008 continue; 2009 2010 /* only free hw when no longer used - check all FEs */ 2011 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2012 continue; 2013 2014 /* do not free hw if this BE is used by other FE */ 2015 if (be->dpcm[stream].users > 1) 2016 continue; 2017 2018 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2019 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2020 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2021 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2022 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2023 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2024 continue; 2025 2026 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2027 be->dai_link->name); 2028 2029 soc_pcm_hw_free(be_substream); 2030 2031 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2032 } 2033 2034 return 0; 2035 } 2036 2037 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2038 { 2039 struct snd_soc_pcm_runtime *fe = substream->private_data; 2040 int err, stream = substream->stream; 2041 2042 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2043 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2044 2045 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2046 2047 /* call hw_free on the frontend */ 2048 err = soc_pcm_hw_free(substream); 2049 if (err < 0) 2050 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 2051 fe->dai_link->name); 2052 2053 /* only hw_params backends that are either sinks or sources 2054 * to this frontend DAI */ 2055 err = dpcm_be_dai_hw_free(fe, stream); 2056 2057 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2058 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2059 2060 mutex_unlock(&fe->card->mutex); 2061 return 0; 2062 } 2063 2064 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2065 { 2066 struct snd_soc_dpcm *dpcm; 2067 int ret; 2068 2069 for_each_dpcm_be(fe, stream, dpcm) { 2070 2071 struct snd_soc_pcm_runtime *be = dpcm->be; 2072 struct snd_pcm_substream *be_substream = 2073 snd_soc_dpcm_get_substream(be, stream); 2074 2075 /* is this op for this BE ? */ 2076 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2077 continue; 2078 2079 /* copy params for each dpcm */ 2080 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 2081 sizeof(struct snd_pcm_hw_params)); 2082 2083 /* perform any hw_params fixups */ 2084 if (be->dai_link->be_hw_params_fixup) { 2085 ret = be->dai_link->be_hw_params_fixup(be, 2086 &dpcm->hw_params); 2087 if (ret < 0) { 2088 dev_err(be->dev, 2089 "ASoC: hw_params BE fixup failed %d\n", 2090 ret); 2091 goto unwind; 2092 } 2093 } 2094 2095 /* copy the fixed-up hw params for BE dai */ 2096 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 2097 sizeof(struct snd_pcm_hw_params)); 2098 2099 /* only allow hw_params() if no connected FEs are running */ 2100 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2101 continue; 2102 2103 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2104 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2105 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2106 continue; 2107 2108 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2109 be->dai_link->name); 2110 2111 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 2112 if (ret < 0) { 2113 dev_err(dpcm->be->dev, 2114 "ASoC: hw_params BE failed %d\n", ret); 2115 goto unwind; 2116 } 2117 2118 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2119 } 2120 return 0; 2121 2122 unwind: 2123 /* disable any enabled and non active backends */ 2124 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2125 struct snd_soc_pcm_runtime *be = dpcm->be; 2126 struct snd_pcm_substream *be_substream = 2127 snd_soc_dpcm_get_substream(be, stream); 2128 2129 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2130 continue; 2131 2132 /* only allow hw_free() if no connected FEs are running */ 2133 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2134 continue; 2135 2136 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2137 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2138 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2139 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2140 continue; 2141 2142 soc_pcm_hw_free(be_substream); 2143 } 2144 2145 return ret; 2146 } 2147 2148 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2149 struct snd_pcm_hw_params *params) 2150 { 2151 struct snd_soc_pcm_runtime *fe = substream->private_data; 2152 int ret, stream = substream->stream; 2153 2154 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2155 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2156 2157 memcpy(&fe->dpcm[substream->stream].hw_params, params, 2158 sizeof(struct snd_pcm_hw_params)); 2159 ret = dpcm_be_dai_hw_params(fe, substream->stream); 2160 if (ret < 0) { 2161 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 2162 goto out; 2163 } 2164 2165 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2166 fe->dai_link->name, params_rate(params), 2167 params_channels(params), params_format(params)); 2168 2169 /* call hw_params on the frontend */ 2170 ret = soc_pcm_hw_params(substream, params); 2171 if (ret < 0) { 2172 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 2173 dpcm_be_dai_hw_free(fe, stream); 2174 } else 2175 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2176 2177 out: 2178 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2179 mutex_unlock(&fe->card->mutex); 2180 return ret; 2181 } 2182 2183 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 2184 struct snd_pcm_substream *substream, int cmd) 2185 { 2186 int ret; 2187 2188 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 2189 dpcm->be->dai_link->name, cmd); 2190 2191 ret = soc_pcm_trigger(substream, cmd); 2192 if (ret < 0) 2193 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 2194 2195 return ret; 2196 } 2197 2198 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2199 int cmd) 2200 { 2201 struct snd_soc_dpcm *dpcm; 2202 int ret = 0; 2203 2204 for_each_dpcm_be(fe, stream, dpcm) { 2205 2206 struct snd_soc_pcm_runtime *be = dpcm->be; 2207 struct snd_pcm_substream *be_substream = 2208 snd_soc_dpcm_get_substream(be, stream); 2209 2210 /* is this op for this BE ? */ 2211 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2212 continue; 2213 2214 switch (cmd) { 2215 case SNDRV_PCM_TRIGGER_START: 2216 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2217 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2218 continue; 2219 2220 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2221 if (ret) 2222 return ret; 2223 2224 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2225 break; 2226 case SNDRV_PCM_TRIGGER_RESUME: 2227 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2228 continue; 2229 2230 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2231 if (ret) 2232 return ret; 2233 2234 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2235 break; 2236 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2237 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2238 continue; 2239 2240 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2241 if (ret) 2242 return ret; 2243 2244 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2245 break; 2246 case SNDRV_PCM_TRIGGER_STOP: 2247 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2248 continue; 2249 2250 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2251 continue; 2252 2253 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2254 if (ret) 2255 return ret; 2256 2257 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2258 break; 2259 case SNDRV_PCM_TRIGGER_SUSPEND: 2260 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2261 continue; 2262 2263 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2264 continue; 2265 2266 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2267 if (ret) 2268 return ret; 2269 2270 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2271 break; 2272 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2273 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2274 continue; 2275 2276 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2277 continue; 2278 2279 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2280 if (ret) 2281 return ret; 2282 2283 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2284 break; 2285 } 2286 } 2287 2288 return ret; 2289 } 2290 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2291 2292 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2293 { 2294 struct snd_soc_pcm_runtime *fe = substream->private_data; 2295 int stream = substream->stream, ret; 2296 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2297 2298 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2299 2300 switch (trigger) { 2301 case SND_SOC_DPCM_TRIGGER_PRE: 2302 /* call trigger on the frontend before the backend. */ 2303 2304 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2305 fe->dai_link->name, cmd); 2306 2307 ret = soc_pcm_trigger(substream, cmd); 2308 if (ret < 0) { 2309 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2310 goto out; 2311 } 2312 2313 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2314 break; 2315 case SND_SOC_DPCM_TRIGGER_POST: 2316 /* call trigger on the frontend after the backend. */ 2317 2318 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2319 if (ret < 0) { 2320 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2321 goto out; 2322 } 2323 2324 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2325 fe->dai_link->name, cmd); 2326 2327 ret = soc_pcm_trigger(substream, cmd); 2328 break; 2329 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2330 /* bespoke trigger() - handles both FE and BEs */ 2331 2332 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2333 fe->dai_link->name, cmd); 2334 2335 ret = soc_pcm_bespoke_trigger(substream, cmd); 2336 if (ret < 0) { 2337 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2338 goto out; 2339 } 2340 break; 2341 default: 2342 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2343 fe->dai_link->name); 2344 ret = -EINVAL; 2345 goto out; 2346 } 2347 2348 switch (cmd) { 2349 case SNDRV_PCM_TRIGGER_START: 2350 case SNDRV_PCM_TRIGGER_RESUME: 2351 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2352 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2353 break; 2354 case SNDRV_PCM_TRIGGER_STOP: 2355 case SNDRV_PCM_TRIGGER_SUSPEND: 2356 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2357 break; 2358 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2359 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2360 break; 2361 } 2362 2363 out: 2364 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2365 return ret; 2366 } 2367 2368 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2369 { 2370 struct snd_soc_pcm_runtime *fe = substream->private_data; 2371 int stream = substream->stream; 2372 2373 /* if FE's runtime_update is already set, we're in race; 2374 * process this trigger later at exit 2375 */ 2376 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2377 fe->dpcm[stream].trigger_pending = cmd + 1; 2378 return 0; /* delayed, assuming it's successful */ 2379 } 2380 2381 /* we're alone, let's trigger */ 2382 return dpcm_fe_dai_do_trigger(substream, cmd); 2383 } 2384 2385 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2386 { 2387 struct snd_soc_dpcm *dpcm; 2388 int ret = 0; 2389 2390 for_each_dpcm_be(fe, stream, dpcm) { 2391 2392 struct snd_soc_pcm_runtime *be = dpcm->be; 2393 struct snd_pcm_substream *be_substream = 2394 snd_soc_dpcm_get_substream(be, stream); 2395 2396 /* is this op for this BE ? */ 2397 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2398 continue; 2399 2400 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2401 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2402 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2403 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2404 continue; 2405 2406 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2407 be->dai_link->name); 2408 2409 ret = soc_pcm_prepare(be_substream); 2410 if (ret < 0) { 2411 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2412 ret); 2413 break; 2414 } 2415 2416 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2417 } 2418 return ret; 2419 } 2420 2421 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2422 { 2423 struct snd_soc_pcm_runtime *fe = substream->private_data; 2424 int stream = substream->stream, ret = 0; 2425 2426 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2427 2428 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2429 2430 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2431 2432 /* there is no point preparing this FE if there are no BEs */ 2433 if (list_empty(&fe->dpcm[stream].be_clients)) { 2434 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2435 fe->dai_link->name); 2436 ret = -EINVAL; 2437 goto out; 2438 } 2439 2440 ret = dpcm_be_dai_prepare(fe, substream->stream); 2441 if (ret < 0) 2442 goto out; 2443 2444 /* call prepare on the frontend */ 2445 ret = soc_pcm_prepare(substream); 2446 if (ret < 0) { 2447 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2448 fe->dai_link->name); 2449 goto out; 2450 } 2451 2452 /* run the stream event for each BE */ 2453 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2454 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2455 2456 out: 2457 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2458 mutex_unlock(&fe->card->mutex); 2459 2460 return ret; 2461 } 2462 2463 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2464 { 2465 struct snd_pcm_substream *substream = 2466 snd_soc_dpcm_get_substream(fe, stream); 2467 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2468 int err; 2469 2470 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2471 stream ? "capture" : "playback", fe->dai_link->name); 2472 2473 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2474 /* call bespoke trigger - FE takes care of all BE triggers */ 2475 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2476 fe->dai_link->name); 2477 2478 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2479 if (err < 0) 2480 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2481 } else { 2482 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2483 fe->dai_link->name); 2484 2485 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2486 if (err < 0) 2487 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2488 } 2489 2490 err = dpcm_be_dai_hw_free(fe, stream); 2491 if (err < 0) 2492 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2493 2494 err = dpcm_be_dai_shutdown(fe, stream); 2495 if (err < 0) 2496 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2497 2498 /* run the stream event for each BE */ 2499 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2500 2501 return 0; 2502 } 2503 2504 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2505 { 2506 struct snd_pcm_substream *substream = 2507 snd_soc_dpcm_get_substream(fe, stream); 2508 struct snd_soc_dpcm *dpcm; 2509 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2510 int ret; 2511 unsigned long flags; 2512 2513 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2514 stream ? "capture" : "playback", fe->dai_link->name); 2515 2516 /* Only start the BE if the FE is ready */ 2517 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2518 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2519 return -EINVAL; 2520 2521 /* startup must always be called for new BEs */ 2522 ret = dpcm_be_dai_startup(fe, stream); 2523 if (ret < 0) 2524 goto disconnect; 2525 2526 /* keep going if FE state is > open */ 2527 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2528 return 0; 2529 2530 ret = dpcm_be_dai_hw_params(fe, stream); 2531 if (ret < 0) 2532 goto close; 2533 2534 /* keep going if FE state is > hw_params */ 2535 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2536 return 0; 2537 2538 2539 ret = dpcm_be_dai_prepare(fe, stream); 2540 if (ret < 0) 2541 goto hw_free; 2542 2543 /* run the stream event for each BE */ 2544 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2545 2546 /* keep going if FE state is > prepare */ 2547 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2548 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2549 return 0; 2550 2551 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2552 /* call trigger on the frontend - FE takes care of all BE triggers */ 2553 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2554 fe->dai_link->name); 2555 2556 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2557 if (ret < 0) { 2558 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2559 goto hw_free; 2560 } 2561 } else { 2562 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2563 fe->dai_link->name); 2564 2565 ret = dpcm_be_dai_trigger(fe, stream, 2566 SNDRV_PCM_TRIGGER_START); 2567 if (ret < 0) { 2568 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2569 goto hw_free; 2570 } 2571 } 2572 2573 return 0; 2574 2575 hw_free: 2576 dpcm_be_dai_hw_free(fe, stream); 2577 close: 2578 dpcm_be_dai_shutdown(fe, stream); 2579 disconnect: 2580 /* disconnect any non started BEs */ 2581 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2582 for_each_dpcm_be(fe, stream, dpcm) { 2583 struct snd_soc_pcm_runtime *be = dpcm->be; 2584 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2585 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2586 } 2587 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2588 2589 return ret; 2590 } 2591 2592 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2593 { 2594 int ret; 2595 2596 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2597 ret = dpcm_run_update_startup(fe, stream); 2598 if (ret < 0) 2599 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2600 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2601 2602 return ret; 2603 } 2604 2605 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2606 { 2607 int ret; 2608 2609 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2610 ret = dpcm_run_update_shutdown(fe, stream); 2611 if (ret < 0) 2612 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2613 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2614 2615 return ret; 2616 } 2617 2618 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2619 { 2620 struct snd_soc_dapm_widget_list *list; 2621 int count, paths; 2622 2623 if (!fe->dai_link->dynamic) 2624 return 0; 2625 2626 /* only check active links */ 2627 if (!fe->cpu_dai->active) 2628 return 0; 2629 2630 /* DAPM sync will call this to update DSP paths */ 2631 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2632 new ? "new" : "old", fe->dai_link->name); 2633 2634 /* skip if FE doesn't have playback capability */ 2635 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) || 2636 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK)) 2637 goto capture; 2638 2639 /* skip if FE isn't currently playing */ 2640 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active) 2641 goto capture; 2642 2643 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2644 if (paths < 0) { 2645 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2646 fe->dai_link->name, "playback"); 2647 return paths; 2648 } 2649 2650 /* update any playback paths */ 2651 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new); 2652 if (count) { 2653 if (new) 2654 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2655 else 2656 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2657 2658 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2659 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2660 } 2661 2662 dpcm_path_put(&list); 2663 2664 capture: 2665 /* skip if FE doesn't have capture capability */ 2666 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) || 2667 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE)) 2668 return 0; 2669 2670 /* skip if FE isn't currently capturing */ 2671 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active) 2672 return 0; 2673 2674 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2675 if (paths < 0) { 2676 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2677 fe->dai_link->name, "capture"); 2678 return paths; 2679 } 2680 2681 /* update any old capture paths */ 2682 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new); 2683 if (count) { 2684 if (new) 2685 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2686 else 2687 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2688 2689 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2690 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2691 } 2692 2693 dpcm_path_put(&list); 2694 2695 return 0; 2696 } 2697 2698 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2699 * any DAI links. 2700 */ 2701 int soc_dpcm_runtime_update(struct snd_soc_card *card) 2702 { 2703 struct snd_soc_pcm_runtime *fe; 2704 int ret = 0; 2705 2706 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2707 /* shutdown all old paths first */ 2708 for_each_card_rtds(card, fe) { 2709 ret = soc_dpcm_fe_runtime_update(fe, 0); 2710 if (ret) 2711 goto out; 2712 } 2713 2714 /* bring new paths up */ 2715 for_each_card_rtds(card, fe) { 2716 ret = soc_dpcm_fe_runtime_update(fe, 1); 2717 if (ret) 2718 goto out; 2719 } 2720 2721 out: 2722 mutex_unlock(&card->mutex); 2723 return ret; 2724 } 2725 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2726 { 2727 struct snd_soc_dpcm *dpcm; 2728 struct snd_soc_dai *dai; 2729 2730 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) { 2731 2732 struct snd_soc_pcm_runtime *be = dpcm->be; 2733 int i; 2734 2735 if (be->dai_link->ignore_suspend) 2736 continue; 2737 2738 for_each_rtd_codec_dai(be, i, dai) { 2739 struct snd_soc_dai_driver *drv = dai->driver; 2740 2741 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2742 be->dai_link->name); 2743 2744 if (drv->ops && drv->ops->digital_mute && 2745 dai->playback_active) 2746 drv->ops->digital_mute(dai, mute); 2747 } 2748 } 2749 2750 return 0; 2751 } 2752 2753 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2754 { 2755 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2756 struct snd_soc_dpcm *dpcm; 2757 struct snd_soc_dapm_widget_list *list; 2758 int ret; 2759 int stream = fe_substream->stream; 2760 2761 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2762 fe->dpcm[stream].runtime = fe_substream->runtime; 2763 2764 ret = dpcm_path_get(fe, stream, &list); 2765 if (ret < 0) { 2766 mutex_unlock(&fe->card->mutex); 2767 return ret; 2768 } else if (ret == 0) { 2769 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2770 fe->dai_link->name, stream ? "capture" : "playback"); 2771 } 2772 2773 /* calculate valid and active FE <-> BE dpcms */ 2774 dpcm_process_paths(fe, stream, &list, 1); 2775 2776 ret = dpcm_fe_dai_startup(fe_substream); 2777 if (ret < 0) { 2778 /* clean up all links */ 2779 for_each_dpcm_be(fe, stream, dpcm) 2780 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2781 2782 dpcm_be_disconnect(fe, stream); 2783 fe->dpcm[stream].runtime = NULL; 2784 } 2785 2786 dpcm_clear_pending_state(fe, stream); 2787 dpcm_path_put(&list); 2788 mutex_unlock(&fe->card->mutex); 2789 return ret; 2790 } 2791 2792 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2793 { 2794 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2795 struct snd_soc_dpcm *dpcm; 2796 int stream = fe_substream->stream, ret; 2797 2798 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2799 ret = dpcm_fe_dai_shutdown(fe_substream); 2800 2801 /* mark FE's links ready to prune */ 2802 for_each_dpcm_be(fe, stream, dpcm) 2803 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2804 2805 dpcm_be_disconnect(fe, stream); 2806 2807 fe->dpcm[stream].runtime = NULL; 2808 mutex_unlock(&fe->card->mutex); 2809 return ret; 2810 } 2811 2812 static void soc_pcm_private_free(struct snd_pcm *pcm) 2813 { 2814 struct snd_soc_pcm_runtime *rtd = pcm->private_data; 2815 2816 /* need to sync the delayed work before releasing resources */ 2817 flush_delayed_work(&rtd->delayed_work); 2818 snd_soc_pcm_component_free(pcm); 2819 } 2820 2821 /* create a new pcm */ 2822 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2823 { 2824 struct snd_soc_dai *codec_dai; 2825 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2826 struct snd_soc_rtdcom_list *rtdcom; 2827 struct snd_pcm *pcm; 2828 char new_name[64]; 2829 int ret = 0, playback = 0, capture = 0; 2830 int i; 2831 2832 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2833 playback = rtd->dai_link->dpcm_playback; 2834 capture = rtd->dai_link->dpcm_capture; 2835 } else { 2836 /* Adapt stream for codec2codec links */ 2837 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ? 2838 &cpu_dai->driver->playback : &cpu_dai->driver->capture; 2839 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ? 2840 &cpu_dai->driver->capture : &cpu_dai->driver->playback; 2841 2842 for_each_rtd_codec_dai(rtd, i, codec_dai) { 2843 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2844 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK)) 2845 playback = 1; 2846 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2847 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE)) 2848 capture = 1; 2849 } 2850 2851 capture = capture && cpu_capture->channels_min; 2852 playback = playback && cpu_playback->channels_min; 2853 } 2854 2855 if (rtd->dai_link->playback_only) { 2856 playback = 1; 2857 capture = 0; 2858 } 2859 2860 if (rtd->dai_link->capture_only) { 2861 playback = 0; 2862 capture = 1; 2863 } 2864 2865 /* create the PCM */ 2866 if (rtd->dai_link->params) { 2867 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2868 rtd->dai_link->stream_name); 2869 2870 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2871 playback, capture, &pcm); 2872 } else if (rtd->dai_link->no_pcm) { 2873 snprintf(new_name, sizeof(new_name), "(%s)", 2874 rtd->dai_link->stream_name); 2875 2876 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2877 playback, capture, &pcm); 2878 } else { 2879 if (rtd->dai_link->dynamic) 2880 snprintf(new_name, sizeof(new_name), "%s (*)", 2881 rtd->dai_link->stream_name); 2882 else 2883 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2884 rtd->dai_link->stream_name, 2885 (rtd->num_codecs > 1) ? 2886 "multicodec" : rtd->codec_dai->name, num); 2887 2888 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2889 capture, &pcm); 2890 } 2891 if (ret < 0) { 2892 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2893 rtd->dai_link->name); 2894 return ret; 2895 } 2896 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2897 2898 /* DAPM dai link stream work */ 2899 if (rtd->dai_link->params) 2900 INIT_DELAYED_WORK(&rtd->delayed_work, 2901 codec2codec_close_delayed_work); 2902 else 2903 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 2904 2905 pcm->nonatomic = rtd->dai_link->nonatomic; 2906 rtd->pcm = pcm; 2907 pcm->private_data = rtd; 2908 2909 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2910 if (playback) 2911 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2912 if (capture) 2913 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2914 goto out; 2915 } 2916 2917 /* ASoC PCM operations */ 2918 if (rtd->dai_link->dynamic) { 2919 rtd->ops.open = dpcm_fe_dai_open; 2920 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2921 rtd->ops.prepare = dpcm_fe_dai_prepare; 2922 rtd->ops.trigger = dpcm_fe_dai_trigger; 2923 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2924 rtd->ops.close = dpcm_fe_dai_close; 2925 rtd->ops.pointer = soc_pcm_pointer; 2926 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2927 } else { 2928 rtd->ops.open = soc_pcm_open; 2929 rtd->ops.hw_params = soc_pcm_hw_params; 2930 rtd->ops.prepare = soc_pcm_prepare; 2931 rtd->ops.trigger = soc_pcm_trigger; 2932 rtd->ops.hw_free = soc_pcm_hw_free; 2933 rtd->ops.close = soc_pcm_close; 2934 rtd->ops.pointer = soc_pcm_pointer; 2935 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2936 } 2937 2938 for_each_rtdcom(rtd, rtdcom) { 2939 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops; 2940 2941 if (!ops) 2942 continue; 2943 2944 if (ops->copy_user) 2945 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2946 if (ops->page) 2947 rtd->ops.page = snd_soc_pcm_component_page; 2948 if (ops->mmap) 2949 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2950 } 2951 2952 if (playback) 2953 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2954 2955 if (capture) 2956 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2957 2958 ret = snd_soc_pcm_component_new(pcm); 2959 if (ret < 0) { 2960 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret); 2961 return ret; 2962 } 2963 2964 pcm->private_free = soc_pcm_private_free; 2965 pcm->no_device_suspend = true; 2966 out: 2967 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 2968 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 2969 cpu_dai->name); 2970 return ret; 2971 } 2972 2973 /* is the current PCM operation for this FE ? */ 2974 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2975 { 2976 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2977 return 1; 2978 return 0; 2979 } 2980 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2981 2982 /* is the current PCM operation for this BE ? */ 2983 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2984 struct snd_soc_pcm_runtime *be, int stream) 2985 { 2986 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2987 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2988 be->dpcm[stream].runtime_update)) 2989 return 1; 2990 return 0; 2991 } 2992 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2993 2994 /* get the substream for this BE */ 2995 struct snd_pcm_substream * 2996 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2997 { 2998 return be->pcm->streams[stream].substream; 2999 } 3000 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3001 3002 /* get the BE runtime state */ 3003 enum snd_soc_dpcm_state 3004 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 3005 { 3006 return be->dpcm[stream].state; 3007 } 3008 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 3009 3010 /* set the BE runtime state */ 3011 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 3012 int stream, enum snd_soc_dpcm_state state) 3013 { 3014 be->dpcm[stream].state = state; 3015 } 3016 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 3017 3018 /* 3019 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3020 * are not running, paused or suspended for the specified stream direction. 3021 */ 3022 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3023 struct snd_soc_pcm_runtime *be, int stream) 3024 { 3025 struct snd_soc_dpcm *dpcm; 3026 int state; 3027 int ret = 1; 3028 unsigned long flags; 3029 3030 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3031 for_each_dpcm_fe(be, stream, dpcm) { 3032 3033 if (dpcm->fe == fe) 3034 continue; 3035 3036 state = dpcm->fe->dpcm[stream].state; 3037 if (state == SND_SOC_DPCM_STATE_START || 3038 state == SND_SOC_DPCM_STATE_PAUSED || 3039 state == SND_SOC_DPCM_STATE_SUSPEND) { 3040 ret = 0; 3041 break; 3042 } 3043 } 3044 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3045 3046 /* it's safe to free/stop this BE DAI */ 3047 return ret; 3048 } 3049 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3050 3051 /* 3052 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3053 * running, paused or suspended for the specified stream direction. 3054 */ 3055 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3056 struct snd_soc_pcm_runtime *be, int stream) 3057 { 3058 struct snd_soc_dpcm *dpcm; 3059 int state; 3060 int ret = 1; 3061 unsigned long flags; 3062 3063 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3064 for_each_dpcm_fe(be, stream, dpcm) { 3065 3066 if (dpcm->fe == fe) 3067 continue; 3068 3069 state = dpcm->fe->dpcm[stream].state; 3070 if (state == SND_SOC_DPCM_STATE_START || 3071 state == SND_SOC_DPCM_STATE_PAUSED || 3072 state == SND_SOC_DPCM_STATE_SUSPEND || 3073 state == SND_SOC_DPCM_STATE_PREPARE) { 3074 ret = 0; 3075 break; 3076 } 3077 } 3078 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3079 3080 /* it's safe to change hw_params */ 3081 return ret; 3082 } 3083 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3084 3085 #ifdef CONFIG_DEBUG_FS 3086 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 3087 { 3088 switch (state) { 3089 case SND_SOC_DPCM_STATE_NEW: 3090 return "new"; 3091 case SND_SOC_DPCM_STATE_OPEN: 3092 return "open"; 3093 case SND_SOC_DPCM_STATE_HW_PARAMS: 3094 return "hw_params"; 3095 case SND_SOC_DPCM_STATE_PREPARE: 3096 return "prepare"; 3097 case SND_SOC_DPCM_STATE_START: 3098 return "start"; 3099 case SND_SOC_DPCM_STATE_STOP: 3100 return "stop"; 3101 case SND_SOC_DPCM_STATE_SUSPEND: 3102 return "suspend"; 3103 case SND_SOC_DPCM_STATE_PAUSED: 3104 return "paused"; 3105 case SND_SOC_DPCM_STATE_HW_FREE: 3106 return "hw_free"; 3107 case SND_SOC_DPCM_STATE_CLOSE: 3108 return "close"; 3109 } 3110 3111 return "unknown"; 3112 } 3113 3114 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 3115 int stream, char *buf, size_t size) 3116 { 3117 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 3118 struct snd_soc_dpcm *dpcm; 3119 ssize_t offset = 0; 3120 unsigned long flags; 3121 3122 /* FE state */ 3123 offset += snprintf(buf + offset, size - offset, 3124 "[%s - %s]\n", fe->dai_link->name, 3125 stream ? "Capture" : "Playback"); 3126 3127 offset += snprintf(buf + offset, size - offset, "State: %s\n", 3128 dpcm_state_string(fe->dpcm[stream].state)); 3129 3130 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3131 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3132 offset += snprintf(buf + offset, size - offset, 3133 "Hardware Params: " 3134 "Format = %s, Channels = %d, Rate = %d\n", 3135 snd_pcm_format_name(params_format(params)), 3136 params_channels(params), 3137 params_rate(params)); 3138 3139 /* BEs state */ 3140 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 3141 3142 if (list_empty(&fe->dpcm[stream].be_clients)) { 3143 offset += snprintf(buf + offset, size - offset, 3144 " No active DSP links\n"); 3145 goto out; 3146 } 3147 3148 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3149 for_each_dpcm_be(fe, stream, dpcm) { 3150 struct snd_soc_pcm_runtime *be = dpcm->be; 3151 params = &dpcm->hw_params; 3152 3153 offset += snprintf(buf + offset, size - offset, 3154 "- %s\n", be->dai_link->name); 3155 3156 offset += snprintf(buf + offset, size - offset, 3157 " State: %s\n", 3158 dpcm_state_string(be->dpcm[stream].state)); 3159 3160 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3161 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3162 offset += snprintf(buf + offset, size - offset, 3163 " Hardware Params: " 3164 "Format = %s, Channels = %d, Rate = %d\n", 3165 snd_pcm_format_name(params_format(params)), 3166 params_channels(params), 3167 params_rate(params)); 3168 } 3169 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3170 out: 3171 return offset; 3172 } 3173 3174 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 3175 size_t count, loff_t *ppos) 3176 { 3177 struct snd_soc_pcm_runtime *fe = file->private_data; 3178 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 3179 char *buf; 3180 3181 buf = kmalloc(out_count, GFP_KERNEL); 3182 if (!buf) 3183 return -ENOMEM; 3184 3185 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK)) 3186 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 3187 buf + offset, out_count - offset); 3188 3189 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE)) 3190 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 3191 buf + offset, out_count - offset); 3192 3193 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 3194 3195 kfree(buf); 3196 return ret; 3197 } 3198 3199 static const struct file_operations dpcm_state_fops = { 3200 .open = simple_open, 3201 .read = dpcm_state_read_file, 3202 .llseek = default_llseek, 3203 }; 3204 3205 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 3206 { 3207 if (!rtd->dai_link) 3208 return; 3209 3210 if (!rtd->dai_link->dynamic) 3211 return; 3212 3213 if (!rtd->card->debugfs_card_root) 3214 return; 3215 3216 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 3217 rtd->card->debugfs_card_root); 3218 3219 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 3220 rtd, &dpcm_state_fops); 3221 } 3222 #endif 3223