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_rtd_components(rtd, rtdcom, component) 122 ignore &= !component->driver->use_pmdown_time; 123 124 return ignore; 125 } 126 127 /** 128 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 129 * @substream: the pcm substream 130 * @hw: the hardware parameters 131 * 132 * Sets the substream runtime hardware parameters. 133 */ 134 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 135 const struct snd_pcm_hardware *hw) 136 { 137 struct snd_pcm_runtime *runtime = substream->runtime; 138 runtime->hw.info = hw->info; 139 runtime->hw.formats = hw->formats; 140 runtime->hw.period_bytes_min = hw->period_bytes_min; 141 runtime->hw.period_bytes_max = hw->period_bytes_max; 142 runtime->hw.periods_min = hw->periods_min; 143 runtime->hw.periods_max = hw->periods_max; 144 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; 145 runtime->hw.fifo_size = hw->fifo_size; 146 return 0; 147 } 148 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 149 150 /* DPCM stream event, send event to FE and all active BEs. */ 151 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 152 int event) 153 { 154 struct snd_soc_dpcm *dpcm; 155 156 for_each_dpcm_be(fe, dir, dpcm) { 157 158 struct snd_soc_pcm_runtime *be = dpcm->be; 159 160 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 161 be->dai_link->name, event, dir); 162 163 if ((event == SND_SOC_DAPM_STREAM_STOP) && 164 (be->dpcm[dir].users >= 1)) 165 continue; 166 167 snd_soc_dapm_stream_event(be, dir, event); 168 } 169 170 snd_soc_dapm_stream_event(fe, dir, event); 171 172 return 0; 173 } 174 175 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 176 struct snd_soc_dai *soc_dai) 177 { 178 struct snd_soc_pcm_runtime *rtd = substream->private_data; 179 int ret; 180 181 if (soc_dai->rate && (soc_dai->driver->symmetric_rates || 182 rtd->dai_link->symmetric_rates)) { 183 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", 184 soc_dai->rate); 185 186 ret = snd_pcm_hw_constraint_single(substream->runtime, 187 SNDRV_PCM_HW_PARAM_RATE, 188 soc_dai->rate); 189 if (ret < 0) { 190 dev_err(soc_dai->dev, 191 "ASoC: Unable to apply rate constraint: %d\n", 192 ret); 193 return ret; 194 } 195 } 196 197 if (soc_dai->channels && (soc_dai->driver->symmetric_channels || 198 rtd->dai_link->symmetric_channels)) { 199 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n", 200 soc_dai->channels); 201 202 ret = snd_pcm_hw_constraint_single(substream->runtime, 203 SNDRV_PCM_HW_PARAM_CHANNELS, 204 soc_dai->channels); 205 if (ret < 0) { 206 dev_err(soc_dai->dev, 207 "ASoC: Unable to apply channel symmetry constraint: %d\n", 208 ret); 209 return ret; 210 } 211 } 212 213 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits || 214 rtd->dai_link->symmetric_samplebits)) { 215 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n", 216 soc_dai->sample_bits); 217 218 ret = snd_pcm_hw_constraint_single(substream->runtime, 219 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 220 soc_dai->sample_bits); 221 if (ret < 0) { 222 dev_err(soc_dai->dev, 223 "ASoC: Unable to apply sample bits symmetry constraint: %d\n", 224 ret); 225 return ret; 226 } 227 } 228 229 return 0; 230 } 231 232 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 233 struct snd_pcm_hw_params *params) 234 { 235 struct snd_soc_pcm_runtime *rtd = substream->private_data; 236 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 237 struct snd_soc_dai *codec_dai; 238 unsigned int rate, channels, sample_bits, symmetry, i; 239 240 rate = params_rate(params); 241 channels = params_channels(params); 242 sample_bits = snd_pcm_format_physical_width(params_format(params)); 243 244 /* reject unmatched parameters when applying symmetry */ 245 symmetry = cpu_dai->driver->symmetric_rates || 246 rtd->dai_link->symmetric_rates; 247 248 for_each_rtd_codec_dai(rtd, i, codec_dai) 249 symmetry |= codec_dai->driver->symmetric_rates; 250 251 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) { 252 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n", 253 cpu_dai->rate, rate); 254 return -EINVAL; 255 } 256 257 symmetry = cpu_dai->driver->symmetric_channels || 258 rtd->dai_link->symmetric_channels; 259 260 for_each_rtd_codec_dai(rtd, i, codec_dai) 261 symmetry |= codec_dai->driver->symmetric_channels; 262 263 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) { 264 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n", 265 cpu_dai->channels, channels); 266 return -EINVAL; 267 } 268 269 symmetry = cpu_dai->driver->symmetric_samplebits || 270 rtd->dai_link->symmetric_samplebits; 271 272 for_each_rtd_codec_dai(rtd, i, codec_dai) 273 symmetry |= codec_dai->driver->symmetric_samplebits; 274 275 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) { 276 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n", 277 cpu_dai->sample_bits, sample_bits); 278 return -EINVAL; 279 } 280 281 return 0; 282 } 283 284 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream) 285 { 286 struct snd_soc_pcm_runtime *rtd = substream->private_data; 287 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver; 288 struct snd_soc_dai_link *link = rtd->dai_link; 289 struct snd_soc_dai *codec_dai; 290 unsigned int symmetry, i; 291 292 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates || 293 cpu_driver->symmetric_channels || link->symmetric_channels || 294 cpu_driver->symmetric_samplebits || link->symmetric_samplebits; 295 296 for_each_rtd_codec_dai(rtd, i, codec_dai) 297 symmetry = symmetry || 298 codec_dai->driver->symmetric_rates || 299 codec_dai->driver->symmetric_channels || 300 codec_dai->driver->symmetric_samplebits; 301 302 return symmetry; 303 } 304 305 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 306 { 307 struct snd_soc_pcm_runtime *rtd = substream->private_data; 308 int ret; 309 310 if (!bits) 311 return; 312 313 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 314 if (ret != 0) 315 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 316 bits, ret); 317 } 318 319 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 320 { 321 struct snd_soc_pcm_runtime *rtd = substream->private_data; 322 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 323 struct snd_soc_dai *codec_dai; 324 int i; 325 unsigned int bits = 0, cpu_bits; 326 327 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 328 for_each_rtd_codec_dai(rtd, i, codec_dai) { 329 if (codec_dai->driver->playback.sig_bits == 0) { 330 bits = 0; 331 break; 332 } 333 bits = max(codec_dai->driver->playback.sig_bits, bits); 334 } 335 cpu_bits = cpu_dai->driver->playback.sig_bits; 336 } else { 337 for_each_rtd_codec_dai(rtd, i, codec_dai) { 338 if (codec_dai->driver->capture.sig_bits == 0) { 339 bits = 0; 340 break; 341 } 342 bits = max(codec_dai->driver->capture.sig_bits, bits); 343 } 344 cpu_bits = cpu_dai->driver->capture.sig_bits; 345 } 346 347 soc_pcm_set_msb(substream, bits); 348 soc_pcm_set_msb(substream, cpu_bits); 349 } 350 351 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 352 { 353 struct snd_pcm_runtime *runtime = substream->runtime; 354 struct snd_pcm_hardware *hw = &runtime->hw; 355 struct snd_soc_pcm_runtime *rtd = substream->private_data; 356 struct snd_soc_dai *codec_dai; 357 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver; 358 struct snd_soc_dai_driver *codec_dai_drv; 359 struct snd_soc_pcm_stream *codec_stream; 360 struct snd_soc_pcm_stream *cpu_stream; 361 unsigned int chan_min = 0, chan_max = UINT_MAX; 362 unsigned int rate_min = 0, rate_max = UINT_MAX; 363 unsigned int rates = UINT_MAX; 364 u64 formats = ULLONG_MAX; 365 int i; 366 367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 368 cpu_stream = &cpu_dai_drv->playback; 369 else 370 cpu_stream = &cpu_dai_drv->capture; 371 372 /* first calculate min/max only for CODECs in the DAI link */ 373 for_each_rtd_codec_dai(rtd, i, codec_dai) { 374 375 /* 376 * Skip CODECs which don't support the current stream type. 377 * Otherwise, since the rate, channel, and format values will 378 * zero in that case, we would have no usable settings left, 379 * causing the resulting setup to fail. 380 * At least one CODEC should match, otherwise we should have 381 * bailed out on a higher level, since there would be no 382 * CODEC to support the transfer direction in that case. 383 */ 384 if (!snd_soc_dai_stream_valid(codec_dai, 385 substream->stream)) 386 continue; 387 388 codec_dai_drv = codec_dai->driver; 389 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 390 codec_stream = &codec_dai_drv->playback; 391 else 392 codec_stream = &codec_dai_drv->capture; 393 chan_min = max(chan_min, codec_stream->channels_min); 394 chan_max = min(chan_max, codec_stream->channels_max); 395 rate_min = max(rate_min, codec_stream->rate_min); 396 rate_max = min_not_zero(rate_max, codec_stream->rate_max); 397 formats &= codec_stream->formats; 398 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates); 399 } 400 401 /* 402 * chan min/max cannot be enforced if there are multiple CODEC DAIs 403 * connected to a single CPU DAI, use CPU DAI's directly and let 404 * channel allocation be fixed up later 405 */ 406 if (rtd->num_codecs > 1) { 407 chan_min = cpu_stream->channels_min; 408 chan_max = cpu_stream->channels_max; 409 } 410 411 hw->channels_min = max(chan_min, cpu_stream->channels_min); 412 hw->channels_max = min(chan_max, cpu_stream->channels_max); 413 if (hw->formats) 414 hw->formats &= formats & cpu_stream->formats; 415 else 416 hw->formats = formats & cpu_stream->formats; 417 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates); 418 419 snd_pcm_limit_hw_rates(runtime); 420 421 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min); 422 hw->rate_min = max(hw->rate_min, rate_min); 423 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max); 424 hw->rate_max = min_not_zero(hw->rate_max, rate_max); 425 } 426 427 static int soc_pcm_components_open(struct snd_pcm_substream *substream, 428 struct snd_soc_component **last) 429 { 430 struct snd_soc_pcm_runtime *rtd = substream->private_data; 431 struct snd_soc_rtdcom_list *rtdcom; 432 struct snd_soc_component *component; 433 int ret = 0; 434 435 for_each_rtd_components(rtd, rtdcom, component) { 436 *last = component; 437 438 ret = snd_soc_component_module_get_when_open(component); 439 if (ret < 0) { 440 dev_err(component->dev, 441 "ASoC: can't get module %s\n", 442 component->name); 443 return ret; 444 } 445 446 ret = snd_soc_component_open(component, substream); 447 if (ret < 0) { 448 dev_err(component->dev, 449 "ASoC: can't open component %s: %d\n", 450 component->name, ret); 451 return ret; 452 } 453 } 454 *last = NULL; 455 return 0; 456 } 457 458 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 459 struct snd_soc_component *last) 460 { 461 struct snd_soc_pcm_runtime *rtd = substream->private_data; 462 struct snd_soc_rtdcom_list *rtdcom; 463 struct snd_soc_component *component; 464 int ret = 0; 465 466 for_each_rtd_components(rtd, rtdcom, component) { 467 if (component == last) 468 break; 469 470 ret |= snd_soc_component_close(component, substream); 471 snd_soc_component_module_put_when_close(component); 472 } 473 474 return ret; 475 } 476 477 /* 478 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 479 * then initialized and any private data can be allocated. This also calls 480 * startup for the cpu DAI, component, machine and codec DAI. 481 */ 482 static int soc_pcm_open(struct snd_pcm_substream *substream) 483 { 484 struct snd_soc_pcm_runtime *rtd = substream->private_data; 485 struct snd_pcm_runtime *runtime = substream->runtime; 486 struct snd_soc_component *component; 487 struct snd_soc_rtdcom_list *rtdcom; 488 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 489 struct snd_soc_dai *codec_dai; 490 const char *codec_dai_name = "multicodec"; 491 int i, ret = 0; 492 493 pinctrl_pm_select_default_state(cpu_dai->dev); 494 for_each_rtd_codec_dai(rtd, i, codec_dai) 495 pinctrl_pm_select_default_state(codec_dai->dev); 496 497 for_each_rtd_components(rtd, rtdcom, component) { 498 pm_runtime_get_sync(component->dev); 499 } 500 501 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 502 503 /* startup the audio subsystem */ 504 ret = snd_soc_dai_startup(cpu_dai, substream); 505 if (ret < 0) { 506 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n", 507 cpu_dai->name, ret); 508 goto out; 509 } 510 511 ret = soc_pcm_components_open(substream, &component); 512 if (ret < 0) 513 goto component_err; 514 515 for_each_rtd_codec_dai(rtd, i, codec_dai) { 516 ret = snd_soc_dai_startup(codec_dai, substream); 517 if (ret < 0) { 518 dev_err(codec_dai->dev, 519 "ASoC: can't open codec %s: %d\n", 520 codec_dai->name, ret); 521 goto codec_dai_err; 522 } 523 524 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 525 codec_dai->tx_mask = 0; 526 else 527 codec_dai->rx_mask = 0; 528 } 529 530 if (rtd->dai_link->ops->startup) { 531 ret = rtd->dai_link->ops->startup(substream); 532 if (ret < 0) { 533 pr_err("ASoC: %s startup failed: %d\n", 534 rtd->dai_link->name, ret); 535 goto machine_err; 536 } 537 } 538 539 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 540 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 541 goto dynamic; 542 543 /* Check that the codec and cpu DAIs are compatible */ 544 soc_pcm_init_runtime_hw(substream); 545 546 if (rtd->num_codecs == 1) 547 codec_dai_name = rtd->codec_dai->name; 548 549 if (soc_pcm_has_symmetry(substream)) 550 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 551 552 ret = -EINVAL; 553 if (!runtime->hw.rates) { 554 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n", 555 codec_dai_name, cpu_dai->name); 556 goto config_err; 557 } 558 if (!runtime->hw.formats) { 559 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n", 560 codec_dai_name, cpu_dai->name); 561 goto config_err; 562 } 563 if (!runtime->hw.channels_min || !runtime->hw.channels_max || 564 runtime->hw.channels_min > runtime->hw.channels_max) { 565 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n", 566 codec_dai_name, cpu_dai->name); 567 goto config_err; 568 } 569 570 soc_pcm_apply_msb(substream); 571 572 /* Symmetry only applies if we've already got an active stream. */ 573 if (cpu_dai->active) { 574 ret = soc_pcm_apply_symmetry(substream, cpu_dai); 575 if (ret != 0) 576 goto config_err; 577 } 578 579 for_each_rtd_codec_dai(rtd, i, codec_dai) { 580 if (codec_dai->active) { 581 ret = soc_pcm_apply_symmetry(substream, codec_dai); 582 if (ret != 0) 583 goto config_err; 584 } 585 } 586 587 pr_debug("ASoC: %s <-> %s info:\n", 588 codec_dai_name, cpu_dai->name); 589 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates); 590 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min, 591 runtime->hw.channels_max); 592 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min, 593 runtime->hw.rate_max); 594 595 dynamic: 596 597 snd_soc_runtime_activate(rtd, substream->stream); 598 599 mutex_unlock(&rtd->card->pcm_mutex); 600 return 0; 601 602 config_err: 603 if (rtd->dai_link->ops->shutdown) 604 rtd->dai_link->ops->shutdown(substream); 605 606 machine_err: 607 i = rtd->num_codecs; 608 609 codec_dai_err: 610 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) 611 snd_soc_dai_shutdown(codec_dai, substream); 612 613 component_err: 614 soc_pcm_components_close(substream, component); 615 616 snd_soc_dai_shutdown(cpu_dai, substream); 617 out: 618 mutex_unlock(&rtd->card->pcm_mutex); 619 620 for_each_rtd_components(rtd, rtdcom, component) { 621 pm_runtime_mark_last_busy(component->dev); 622 pm_runtime_put_autosuspend(component->dev); 623 } 624 625 for_each_rtd_codec_dai(rtd, i, codec_dai) { 626 if (!codec_dai->active) 627 pinctrl_pm_select_sleep_state(codec_dai->dev); 628 } 629 if (!cpu_dai->active) 630 pinctrl_pm_select_sleep_state(cpu_dai->dev); 631 632 return ret; 633 } 634 635 /* 636 * Power down the audio subsystem pmdown_time msecs after close is called. 637 * This is to ensure there are no pops or clicks in between any music tracks 638 * due to DAPM power cycling. 639 */ 640 static void close_delayed_work(struct snd_soc_pcm_runtime *rtd) 641 { 642 struct snd_soc_dai *codec_dai = rtd->codec_dais[0]; 643 644 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 645 646 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n", 647 codec_dai->driver->playback.stream_name, 648 codec_dai->playback_active ? "active" : "inactive", 649 rtd->pop_wait ? "yes" : "no"); 650 651 /* are we waiting on this codec DAI stream */ 652 if (rtd->pop_wait == 1) { 653 rtd->pop_wait = 0; 654 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, 655 SND_SOC_DAPM_STREAM_STOP); 656 } 657 658 mutex_unlock(&rtd->card->pcm_mutex); 659 } 660 661 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd) 662 { 663 /* 664 * Currently nothing to do for c2c links 665 * Since c2c links are internal nodes in the DAPM graph and 666 * don't interface with the outside world or application layer 667 * we don't have to do any special handling on close. 668 */ 669 } 670 671 /* 672 * Called by ALSA when a PCM substream is closed. Private data can be 673 * freed here. The cpu DAI, codec DAI, machine and components are also 674 * shutdown. 675 */ 676 static int soc_pcm_close(struct snd_pcm_substream *substream) 677 { 678 struct snd_soc_pcm_runtime *rtd = substream->private_data; 679 struct snd_soc_component *component; 680 struct snd_soc_rtdcom_list *rtdcom; 681 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 682 struct snd_soc_dai *codec_dai; 683 int i; 684 685 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 686 687 snd_soc_runtime_deactivate(rtd, substream->stream); 688 689 /* clear the corresponding DAIs rate when inactive */ 690 if (!cpu_dai->active) 691 cpu_dai->rate = 0; 692 693 for_each_rtd_codec_dai(rtd, i, codec_dai) { 694 if (!codec_dai->active) 695 codec_dai->rate = 0; 696 } 697 698 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream); 699 700 snd_soc_dai_shutdown(cpu_dai, substream); 701 702 for_each_rtd_codec_dai(rtd, i, codec_dai) 703 snd_soc_dai_shutdown(codec_dai, substream); 704 705 if (rtd->dai_link->ops->shutdown) 706 rtd->dai_link->ops->shutdown(substream); 707 708 soc_pcm_components_close(substream, NULL); 709 710 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 711 if (snd_soc_runtime_ignore_pmdown_time(rtd)) { 712 /* powered down playback stream now */ 713 snd_soc_dapm_stream_event(rtd, 714 SNDRV_PCM_STREAM_PLAYBACK, 715 SND_SOC_DAPM_STREAM_STOP); 716 } else { 717 /* start delayed pop wq here for playback streams */ 718 rtd->pop_wait = 1; 719 queue_delayed_work(system_power_efficient_wq, 720 &rtd->delayed_work, 721 msecs_to_jiffies(rtd->pmdown_time)); 722 } 723 } else { 724 /* capture streams can be powered down now */ 725 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE, 726 SND_SOC_DAPM_STREAM_STOP); 727 } 728 729 mutex_unlock(&rtd->card->pcm_mutex); 730 731 for_each_rtd_components(rtd, rtdcom, component) { 732 pm_runtime_mark_last_busy(component->dev); 733 pm_runtime_put_autosuspend(component->dev); 734 } 735 736 for_each_rtd_codec_dai(rtd, i, codec_dai) { 737 if (!codec_dai->active) 738 pinctrl_pm_select_sleep_state(codec_dai->dev); 739 } 740 if (!cpu_dai->active) 741 pinctrl_pm_select_sleep_state(cpu_dai->dev); 742 743 return 0; 744 } 745 746 /* 747 * Called by ALSA when the PCM substream is prepared, can set format, sample 748 * rate, etc. This function is non atomic and can be called multiple times, 749 * it can refer to the runtime info. 750 */ 751 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 752 { 753 struct snd_soc_pcm_runtime *rtd = substream->private_data; 754 struct snd_soc_component *component; 755 struct snd_soc_rtdcom_list *rtdcom; 756 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 757 struct snd_soc_dai *codec_dai; 758 int i, ret = 0; 759 760 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 761 762 if (rtd->dai_link->ops->prepare) { 763 ret = rtd->dai_link->ops->prepare(substream); 764 if (ret < 0) { 765 dev_err(rtd->card->dev, "ASoC: machine prepare error:" 766 " %d\n", ret); 767 goto out; 768 } 769 } 770 771 for_each_rtd_components(rtd, rtdcom, component) { 772 ret = snd_soc_component_prepare(component, substream); 773 if (ret < 0) { 774 dev_err(component->dev, 775 "ASoC: platform prepare error: %d\n", ret); 776 goto out; 777 } 778 } 779 780 for_each_rtd_codec_dai(rtd, i, codec_dai) { 781 ret = snd_soc_dai_prepare(codec_dai, substream); 782 if (ret < 0) { 783 dev_err(codec_dai->dev, 784 "ASoC: codec DAI prepare error: %d\n", 785 ret); 786 goto out; 787 } 788 } 789 790 ret = snd_soc_dai_prepare(cpu_dai, substream); 791 if (ret < 0) { 792 dev_err(cpu_dai->dev, 793 "ASoC: cpu DAI prepare error: %d\n", ret); 794 goto out; 795 } 796 797 /* cancel any delayed stream shutdown that is pending */ 798 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 799 rtd->pop_wait) { 800 rtd->pop_wait = 0; 801 cancel_delayed_work(&rtd->delayed_work); 802 } 803 804 snd_soc_dapm_stream_event(rtd, substream->stream, 805 SND_SOC_DAPM_STREAM_START); 806 807 for_each_rtd_codec_dai(rtd, i, codec_dai) 808 snd_soc_dai_digital_mute(codec_dai, 0, 809 substream->stream); 810 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream); 811 812 out: 813 mutex_unlock(&rtd->card->pcm_mutex); 814 return ret; 815 } 816 817 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 818 unsigned int mask) 819 { 820 struct snd_interval *interval; 821 int channels = hweight_long(mask); 822 823 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 824 interval->min = channels; 825 interval->max = channels; 826 } 827 828 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream, 829 struct snd_soc_component *last) 830 { 831 struct snd_soc_pcm_runtime *rtd = substream->private_data; 832 struct snd_soc_rtdcom_list *rtdcom; 833 struct snd_soc_component *component; 834 int ret = 0; 835 836 for_each_rtd_components(rtd, rtdcom, component) { 837 if (component == last) 838 break; 839 840 ret |= snd_soc_component_hw_free(component, substream); 841 } 842 843 return ret; 844 } 845 846 /* 847 * Called by ALSA when the hardware params are set by application. This 848 * function can also be called multiple times and can allocate buffers 849 * (using snd_pcm_lib_* ). It's non-atomic. 850 */ 851 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 852 struct snd_pcm_hw_params *params) 853 { 854 struct snd_soc_pcm_runtime *rtd = substream->private_data; 855 struct snd_soc_component *component; 856 struct snd_soc_rtdcom_list *rtdcom; 857 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 858 struct snd_soc_dai *codec_dai; 859 int i, ret = 0; 860 861 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 862 863 ret = soc_pcm_params_symmetry(substream, params); 864 if (ret) 865 goto out; 866 867 if (rtd->dai_link->ops->hw_params) { 868 ret = rtd->dai_link->ops->hw_params(substream, params); 869 if (ret < 0) { 870 dev_err(rtd->card->dev, "ASoC: machine hw_params" 871 " failed: %d\n", ret); 872 goto out; 873 } 874 } 875 876 for_each_rtd_codec_dai(rtd, i, codec_dai) { 877 struct snd_pcm_hw_params codec_params; 878 879 /* 880 * Skip CODECs which don't support the current stream type, 881 * the idea being that if a CODEC is not used for the currently 882 * set up transfer direction, it should not need to be 883 * configured, especially since the configuration used might 884 * not even be supported by that CODEC. There may be cases 885 * however where a CODEC needs to be set up although it is 886 * actually not being used for the transfer, e.g. if a 887 * capture-only CODEC is acting as an LRCLK and/or BCLK master 888 * for the DAI link including a playback-only CODEC. 889 * If this becomes necessary, we will have to augment the 890 * machine driver setup with information on how to act, so 891 * we can do the right thing here. 892 */ 893 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 894 continue; 895 896 /* copy params for each codec */ 897 codec_params = *params; 898 899 /* fixup params based on TDM slot masks */ 900 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 901 codec_dai->tx_mask) 902 soc_pcm_codec_params_fixup(&codec_params, 903 codec_dai->tx_mask); 904 905 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 906 codec_dai->rx_mask) 907 soc_pcm_codec_params_fixup(&codec_params, 908 codec_dai->rx_mask); 909 910 ret = snd_soc_dai_hw_params(codec_dai, substream, 911 &codec_params); 912 if(ret < 0) 913 goto codec_err; 914 915 codec_dai->rate = params_rate(&codec_params); 916 codec_dai->channels = params_channels(&codec_params); 917 codec_dai->sample_bits = snd_pcm_format_physical_width( 918 params_format(&codec_params)); 919 920 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 921 } 922 923 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 924 if (ret < 0) 925 goto interface_err; 926 927 /* store the parameters for each DAIs */ 928 cpu_dai->rate = params_rate(params); 929 cpu_dai->channels = params_channels(params); 930 cpu_dai->sample_bits = 931 snd_pcm_format_physical_width(params_format(params)); 932 933 snd_soc_dapm_update_dai(substream, params, cpu_dai); 934 935 for_each_rtd_components(rtd, rtdcom, component) { 936 ret = snd_soc_component_hw_params(component, substream, params); 937 if (ret < 0) { 938 dev_err(component->dev, 939 "ASoC: %s hw params failed: %d\n", 940 component->name, ret); 941 goto component_err; 942 } 943 } 944 component = NULL; 945 946 out: 947 mutex_unlock(&rtd->card->pcm_mutex); 948 return ret; 949 950 component_err: 951 soc_pcm_components_hw_free(substream, component); 952 953 snd_soc_dai_hw_free(cpu_dai, substream); 954 cpu_dai->rate = 0; 955 956 interface_err: 957 i = rtd->num_codecs; 958 959 codec_err: 960 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) { 961 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 962 continue; 963 964 snd_soc_dai_hw_free(codec_dai, substream); 965 codec_dai->rate = 0; 966 } 967 968 if (rtd->dai_link->ops->hw_free) 969 rtd->dai_link->ops->hw_free(substream); 970 971 mutex_unlock(&rtd->card->pcm_mutex); 972 return ret; 973 } 974 975 /* 976 * Frees resources allocated by hw_params, can be called multiple times 977 */ 978 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 979 { 980 struct snd_soc_pcm_runtime *rtd = substream->private_data; 981 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 982 struct snd_soc_dai *codec_dai; 983 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 984 int i; 985 986 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 987 988 /* clear the corresponding DAIs parameters when going to be inactive */ 989 if (cpu_dai->active == 1) { 990 cpu_dai->rate = 0; 991 cpu_dai->channels = 0; 992 cpu_dai->sample_bits = 0; 993 } 994 995 for_each_rtd_codec_dai(rtd, i, codec_dai) { 996 if (codec_dai->active == 1) { 997 codec_dai->rate = 0; 998 codec_dai->channels = 0; 999 codec_dai->sample_bits = 0; 1000 } 1001 } 1002 1003 /* apply codec digital mute */ 1004 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1005 if ((playback && codec_dai->playback_active == 1) || 1006 (!playback && codec_dai->capture_active == 1)) 1007 snd_soc_dai_digital_mute(codec_dai, 1, 1008 substream->stream); 1009 } 1010 1011 /* free any machine hw params */ 1012 if (rtd->dai_link->ops->hw_free) 1013 rtd->dai_link->ops->hw_free(substream); 1014 1015 /* free any component resources */ 1016 soc_pcm_components_hw_free(substream, NULL); 1017 1018 /* now free hw params for the DAIs */ 1019 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1020 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1021 continue; 1022 1023 snd_soc_dai_hw_free(codec_dai, substream); 1024 } 1025 1026 snd_soc_dai_hw_free(cpu_dai, substream); 1027 1028 mutex_unlock(&rtd->card->pcm_mutex); 1029 return 0; 1030 } 1031 1032 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd) 1033 { 1034 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1035 struct snd_soc_component *component; 1036 struct snd_soc_rtdcom_list *rtdcom; 1037 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1038 struct snd_soc_dai *codec_dai; 1039 int i, ret; 1040 1041 if (rtd->dai_link->ops->trigger) { 1042 ret = rtd->dai_link->ops->trigger(substream, cmd); 1043 if (ret < 0) 1044 return ret; 1045 } 1046 1047 for_each_rtd_components(rtd, rtdcom, component) { 1048 ret = snd_soc_component_trigger(component, substream, cmd); 1049 if (ret < 0) 1050 return ret; 1051 } 1052 1053 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd); 1054 if (ret < 0) 1055 return ret; 1056 1057 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1058 ret = snd_soc_dai_trigger(codec_dai, substream, cmd); 1059 if (ret < 0) 1060 return ret; 1061 } 1062 1063 return 0; 1064 } 1065 1066 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd) 1067 { 1068 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1069 struct snd_soc_component *component; 1070 struct snd_soc_rtdcom_list *rtdcom; 1071 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1072 struct snd_soc_dai *codec_dai; 1073 int i, ret; 1074 1075 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1076 ret = snd_soc_dai_trigger(codec_dai, substream, cmd); 1077 if (ret < 0) 1078 return ret; 1079 } 1080 1081 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd); 1082 if (ret < 0) 1083 return ret; 1084 1085 for_each_rtd_components(rtd, rtdcom, component) { 1086 ret = snd_soc_component_trigger(component, substream, cmd); 1087 if (ret < 0) 1088 return ret; 1089 } 1090 1091 if (rtd->dai_link->ops->trigger) { 1092 ret = rtd->dai_link->ops->trigger(substream, cmd); 1093 if (ret < 0) 1094 return ret; 1095 } 1096 1097 return 0; 1098 } 1099 1100 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1101 { 1102 int ret; 1103 1104 switch (cmd) { 1105 case SNDRV_PCM_TRIGGER_START: 1106 case SNDRV_PCM_TRIGGER_RESUME: 1107 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1108 ret = soc_pcm_trigger_start(substream, cmd); 1109 break; 1110 case SNDRV_PCM_TRIGGER_STOP: 1111 case SNDRV_PCM_TRIGGER_SUSPEND: 1112 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1113 ret = soc_pcm_trigger_stop(substream, cmd); 1114 break; 1115 default: 1116 return -EINVAL; 1117 } 1118 1119 return ret; 1120 } 1121 1122 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream, 1123 int cmd) 1124 { 1125 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1126 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1127 struct snd_soc_dai *codec_dai; 1128 int i, ret; 1129 1130 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1131 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd); 1132 if (ret < 0) 1133 return ret; 1134 } 1135 1136 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd); 1137 if (ret < 0) 1138 return ret; 1139 1140 return 0; 1141 } 1142 /* 1143 * soc level wrapper for pointer callback 1144 * If cpu_dai, codec_dai, component driver has the delay callback, then 1145 * the runtime->delay will be updated accordingly. 1146 */ 1147 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1148 { 1149 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1150 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1151 struct snd_soc_dai *codec_dai; 1152 struct snd_pcm_runtime *runtime = substream->runtime; 1153 snd_pcm_uframes_t offset = 0; 1154 snd_pcm_sframes_t delay = 0; 1155 snd_pcm_sframes_t codec_delay = 0; 1156 int i; 1157 1158 /* clearing the previous total delay */ 1159 runtime->delay = 0; 1160 1161 offset = snd_soc_pcm_component_pointer(substream); 1162 1163 /* base delay if assigned in pointer callback */ 1164 delay = runtime->delay; 1165 1166 delay += snd_soc_dai_delay(cpu_dai, substream); 1167 1168 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1169 codec_delay = max(codec_delay, 1170 snd_soc_dai_delay(codec_dai, substream)); 1171 } 1172 delay += codec_delay; 1173 1174 runtime->delay = delay; 1175 1176 return offset; 1177 } 1178 1179 /* connect a FE and BE */ 1180 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1181 struct snd_soc_pcm_runtime *be, int stream) 1182 { 1183 struct snd_soc_dpcm *dpcm; 1184 unsigned long flags; 1185 #ifdef CONFIG_DEBUG_FS 1186 char *name; 1187 #endif 1188 1189 /* only add new dpcms */ 1190 for_each_dpcm_be(fe, stream, dpcm) { 1191 if (dpcm->be == be && dpcm->fe == fe) 1192 return 0; 1193 } 1194 1195 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1196 if (!dpcm) 1197 return -ENOMEM; 1198 1199 dpcm->be = be; 1200 dpcm->fe = fe; 1201 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1202 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1203 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1204 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1205 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1206 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1207 1208 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1209 stream ? "capture" : "playback", fe->dai_link->name, 1210 stream ? "<-" : "->", be->dai_link->name); 1211 1212 #ifdef CONFIG_DEBUG_FS 1213 name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name, 1214 stream ? "capture" : "playback"); 1215 if (name) { 1216 dpcm->debugfs_state = debugfs_create_dir(name, 1217 fe->debugfs_dpcm_root); 1218 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 1219 &dpcm->state); 1220 kfree(name); 1221 } 1222 #endif 1223 return 1; 1224 } 1225 1226 /* reparent a BE onto another FE */ 1227 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1228 struct snd_soc_pcm_runtime *be, int stream) 1229 { 1230 struct snd_soc_dpcm *dpcm; 1231 struct snd_pcm_substream *fe_substream, *be_substream; 1232 1233 /* reparent if BE is connected to other FEs */ 1234 if (!be->dpcm[stream].users) 1235 return; 1236 1237 be_substream = snd_soc_dpcm_get_substream(be, stream); 1238 1239 for_each_dpcm_fe(be, stream, dpcm) { 1240 if (dpcm->fe == fe) 1241 continue; 1242 1243 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1244 stream ? "capture" : "playback", 1245 dpcm->fe->dai_link->name, 1246 stream ? "<-" : "->", dpcm->be->dai_link->name); 1247 1248 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1249 be_substream->runtime = fe_substream->runtime; 1250 break; 1251 } 1252 } 1253 1254 /* disconnect a BE and FE */ 1255 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1256 { 1257 struct snd_soc_dpcm *dpcm, *d; 1258 unsigned long flags; 1259 1260 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1261 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1262 stream ? "capture" : "playback", 1263 dpcm->be->dai_link->name); 1264 1265 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1266 continue; 1267 1268 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1269 stream ? "capture" : "playback", fe->dai_link->name, 1270 stream ? "<-" : "->", dpcm->be->dai_link->name); 1271 1272 /* BEs still alive need new FE */ 1273 dpcm_be_reparent(fe, dpcm->be, stream); 1274 1275 #ifdef CONFIG_DEBUG_FS 1276 debugfs_remove_recursive(dpcm->debugfs_state); 1277 #endif 1278 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1279 list_del(&dpcm->list_be); 1280 list_del(&dpcm->list_fe); 1281 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1282 kfree(dpcm); 1283 } 1284 } 1285 1286 /* get BE for DAI widget and stream */ 1287 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1288 struct snd_soc_dapm_widget *widget, int stream) 1289 { 1290 struct snd_soc_pcm_runtime *be; 1291 struct snd_soc_dai *dai; 1292 int i; 1293 1294 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1295 1296 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1297 for_each_card_rtds(card, be) { 1298 1299 if (!be->dai_link->no_pcm) 1300 continue; 1301 1302 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1303 be->cpu_dai->playback_widget ? 1304 be->cpu_dai->playback_widget->name : "(not set)"); 1305 1306 if (be->cpu_dai->playback_widget == widget) 1307 return be; 1308 1309 for_each_rtd_codec_dai(be, i, dai) { 1310 if (dai->playback_widget == widget) 1311 return be; 1312 } 1313 } 1314 } else { 1315 1316 for_each_card_rtds(card, be) { 1317 1318 if (!be->dai_link->no_pcm) 1319 continue; 1320 1321 dev_dbg(card->dev, "ASoC: try BE %s\n", 1322 be->cpu_dai->capture_widget ? 1323 be->cpu_dai->capture_widget->name : "(not set)"); 1324 1325 if (be->cpu_dai->capture_widget == widget) 1326 return be; 1327 1328 for_each_rtd_codec_dai(be, i, dai) { 1329 if (dai->capture_widget == widget) 1330 return be; 1331 } 1332 } 1333 } 1334 1335 /* dai link name and stream name set correctly ? */ 1336 dev_err(card->dev, "ASoC: can't get %s BE for %s\n", 1337 stream ? "capture" : "playback", widget->name); 1338 return NULL; 1339 } 1340 1341 static inline struct snd_soc_dapm_widget * 1342 dai_get_widget(struct snd_soc_dai *dai, int stream) 1343 { 1344 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1345 return dai->playback_widget; 1346 else 1347 return dai->capture_widget; 1348 } 1349 1350 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1351 struct snd_soc_dapm_widget *widget) 1352 { 1353 int i; 1354 1355 for (i = 0; i < list->num_widgets; i++) { 1356 if (widget == list->widgets[i]) 1357 return 1; 1358 } 1359 1360 return 0; 1361 } 1362 1363 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, 1364 enum snd_soc_dapm_direction dir) 1365 { 1366 struct snd_soc_card *card = widget->dapm->card; 1367 struct snd_soc_pcm_runtime *rtd; 1368 struct snd_soc_dai *dai; 1369 int i; 1370 1371 if (dir == SND_SOC_DAPM_DIR_OUT) { 1372 for_each_card_rtds(card, rtd) { 1373 if (!rtd->dai_link->no_pcm) 1374 continue; 1375 1376 if (rtd->cpu_dai->playback_widget == widget) 1377 return true; 1378 1379 for_each_rtd_codec_dai(rtd, i, dai) { 1380 if (dai->playback_widget == widget) 1381 return true; 1382 } 1383 } 1384 } else { /* SND_SOC_DAPM_DIR_IN */ 1385 for_each_card_rtds(card, rtd) { 1386 if (!rtd->dai_link->no_pcm) 1387 continue; 1388 1389 if (rtd->cpu_dai->capture_widget == widget) 1390 return true; 1391 1392 for_each_rtd_codec_dai(rtd, i, dai) { 1393 if (dai->capture_widget == widget) 1394 return true; 1395 } 1396 } 1397 } 1398 1399 return false; 1400 } 1401 1402 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1403 int stream, struct snd_soc_dapm_widget_list **list) 1404 { 1405 struct snd_soc_dai *cpu_dai = fe->cpu_dai; 1406 int paths; 1407 1408 /* get number of valid DAI paths and their widgets */ 1409 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1410 dpcm_end_walk_at_be); 1411 1412 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1413 stream ? "capture" : "playback"); 1414 1415 return paths; 1416 } 1417 1418 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1419 struct snd_soc_dapm_widget_list **list_) 1420 { 1421 struct snd_soc_dpcm *dpcm; 1422 struct snd_soc_dapm_widget_list *list = *list_; 1423 struct snd_soc_dapm_widget *widget; 1424 struct snd_soc_dai *dai; 1425 int prune = 0; 1426 int do_prune; 1427 1428 /* Destroy any old FE <--> BE connections */ 1429 for_each_dpcm_be(fe, stream, dpcm) { 1430 unsigned int i; 1431 1432 /* is there a valid CPU DAI widget for this BE */ 1433 widget = dai_get_widget(dpcm->be->cpu_dai, stream); 1434 1435 /* prune the BE if it's no longer in our active list */ 1436 if (widget && widget_in_list(list, widget)) 1437 continue; 1438 1439 /* is there a valid CODEC DAI widget for this BE */ 1440 do_prune = 1; 1441 for_each_rtd_codec_dai(dpcm->be, i, dai) { 1442 widget = dai_get_widget(dai, stream); 1443 1444 /* prune the BE if it's no longer in our active list */ 1445 if (widget && widget_in_list(list, widget)) 1446 do_prune = 0; 1447 } 1448 if (!do_prune) 1449 continue; 1450 1451 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1452 stream ? "capture" : "playback", 1453 dpcm->be->dai_link->name, fe->dai_link->name); 1454 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1455 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1456 prune++; 1457 } 1458 1459 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1460 return prune; 1461 } 1462 1463 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1464 struct snd_soc_dapm_widget_list **list_) 1465 { 1466 struct snd_soc_card *card = fe->card; 1467 struct snd_soc_dapm_widget_list *list = *list_; 1468 struct snd_soc_pcm_runtime *be; 1469 int i, new = 0, err; 1470 1471 /* Create any new FE <--> BE connections */ 1472 for (i = 0; i < list->num_widgets; i++) { 1473 1474 switch (list->widgets[i]->id) { 1475 case snd_soc_dapm_dai_in: 1476 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1477 continue; 1478 break; 1479 case snd_soc_dapm_dai_out: 1480 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1481 continue; 1482 break; 1483 default: 1484 continue; 1485 } 1486 1487 /* is there a valid BE rtd for this widget */ 1488 be = dpcm_get_be(card, list->widgets[i], stream); 1489 if (!be) { 1490 dev_err(fe->dev, "ASoC: no BE found for %s\n", 1491 list->widgets[i]->name); 1492 continue; 1493 } 1494 1495 /* make sure BE is a real BE */ 1496 if (!be->dai_link->no_pcm) 1497 continue; 1498 1499 /* don't connect if FE is not running */ 1500 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1501 continue; 1502 1503 /* newly connected FE and BE */ 1504 err = dpcm_be_connect(fe, be, stream); 1505 if (err < 0) { 1506 dev_err(fe->dev, "ASoC: can't connect %s\n", 1507 list->widgets[i]->name); 1508 break; 1509 } else if (err == 0) /* already connected */ 1510 continue; 1511 1512 /* new */ 1513 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1514 new++; 1515 } 1516 1517 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1518 return new; 1519 } 1520 1521 /* 1522 * Find the corresponding BE DAIs that source or sink audio to this 1523 * FE substream. 1524 */ 1525 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1526 int stream, struct snd_soc_dapm_widget_list **list, int new) 1527 { 1528 if (new) 1529 return dpcm_add_paths(fe, stream, list); 1530 else 1531 return dpcm_prune_paths(fe, stream, list); 1532 } 1533 1534 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1535 { 1536 struct snd_soc_dpcm *dpcm; 1537 unsigned long flags; 1538 1539 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1540 for_each_dpcm_be(fe, stream, dpcm) 1541 dpcm->be->dpcm[stream].runtime_update = 1542 SND_SOC_DPCM_UPDATE_NO; 1543 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1544 } 1545 1546 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1547 int stream) 1548 { 1549 struct snd_soc_dpcm *dpcm; 1550 1551 /* disable any enabled and non active backends */ 1552 for_each_dpcm_be(fe, stream, dpcm) { 1553 1554 struct snd_soc_pcm_runtime *be = dpcm->be; 1555 struct snd_pcm_substream *be_substream = 1556 snd_soc_dpcm_get_substream(be, stream); 1557 1558 if (be->dpcm[stream].users == 0) 1559 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1560 stream ? "capture" : "playback", 1561 be->dpcm[stream].state); 1562 1563 if (--be->dpcm[stream].users != 0) 1564 continue; 1565 1566 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1567 continue; 1568 1569 soc_pcm_close(be_substream); 1570 be_substream->runtime = NULL; 1571 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1572 } 1573 } 1574 1575 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1576 { 1577 struct snd_soc_dpcm *dpcm; 1578 int err, count = 0; 1579 1580 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1581 for_each_dpcm_be(fe, stream, dpcm) { 1582 1583 struct snd_soc_pcm_runtime *be = dpcm->be; 1584 struct snd_pcm_substream *be_substream = 1585 snd_soc_dpcm_get_substream(be, stream); 1586 1587 if (!be_substream) { 1588 dev_err(be->dev, "ASoC: no backend %s stream\n", 1589 stream ? "capture" : "playback"); 1590 continue; 1591 } 1592 1593 /* is this op for this BE ? */ 1594 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1595 continue; 1596 1597 /* first time the dpcm is open ? */ 1598 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1599 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1600 stream ? "capture" : "playback", 1601 be->dpcm[stream].state); 1602 1603 if (be->dpcm[stream].users++ != 0) 1604 continue; 1605 1606 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1607 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1608 continue; 1609 1610 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1611 stream ? "capture" : "playback", be->dai_link->name); 1612 1613 be_substream->runtime = be->dpcm[stream].runtime; 1614 err = soc_pcm_open(be_substream); 1615 if (err < 0) { 1616 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1617 be->dpcm[stream].users--; 1618 if (be->dpcm[stream].users < 0) 1619 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1620 stream ? "capture" : "playback", 1621 be->dpcm[stream].state); 1622 1623 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1624 goto unwind; 1625 } 1626 1627 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1628 count++; 1629 } 1630 1631 return count; 1632 1633 unwind: 1634 /* disable any enabled and non active backends */ 1635 for_each_dpcm_be_rollback(fe, stream, dpcm) { 1636 struct snd_soc_pcm_runtime *be = dpcm->be; 1637 struct snd_pcm_substream *be_substream = 1638 snd_soc_dpcm_get_substream(be, stream); 1639 1640 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1641 continue; 1642 1643 if (be->dpcm[stream].users == 0) 1644 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1645 stream ? "capture" : "playback", 1646 be->dpcm[stream].state); 1647 1648 if (--be->dpcm[stream].users != 0) 1649 continue; 1650 1651 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1652 continue; 1653 1654 soc_pcm_close(be_substream); 1655 be_substream->runtime = NULL; 1656 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1657 } 1658 1659 return err; 1660 } 1661 1662 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 1663 struct snd_soc_pcm_stream *stream) 1664 { 1665 runtime->hw.rate_min = stream->rate_min; 1666 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX); 1667 runtime->hw.channels_min = stream->channels_min; 1668 runtime->hw.channels_max = stream->channels_max; 1669 if (runtime->hw.formats) 1670 runtime->hw.formats &= stream->formats; 1671 else 1672 runtime->hw.formats = stream->formats; 1673 runtime->hw.rates = stream->rates; 1674 } 1675 1676 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream, 1677 u64 *formats) 1678 { 1679 struct snd_soc_pcm_runtime *fe = substream->private_data; 1680 struct snd_soc_dpcm *dpcm; 1681 struct snd_soc_dai *dai; 1682 int stream = substream->stream; 1683 1684 if (!fe->dai_link->dpcm_merged_format) 1685 return; 1686 1687 /* 1688 * It returns merged BE codec format 1689 * if FE want to use it (= dpcm_merged_format) 1690 */ 1691 1692 for_each_dpcm_be(fe, stream, dpcm) { 1693 struct snd_soc_pcm_runtime *be = dpcm->be; 1694 struct snd_soc_dai_driver *codec_dai_drv; 1695 struct snd_soc_pcm_stream *codec_stream; 1696 int i; 1697 1698 for_each_rtd_codec_dai(be, i, dai) { 1699 /* 1700 * Skip CODECs which don't support the current stream 1701 * type. See soc_pcm_init_runtime_hw() for more details 1702 */ 1703 if (!snd_soc_dai_stream_valid(dai, stream)) 1704 continue; 1705 1706 codec_dai_drv = dai->driver; 1707 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1708 codec_stream = &codec_dai_drv->playback; 1709 else 1710 codec_stream = &codec_dai_drv->capture; 1711 1712 *formats &= codec_stream->formats; 1713 } 1714 } 1715 } 1716 1717 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream, 1718 unsigned int *channels_min, 1719 unsigned int *channels_max) 1720 { 1721 struct snd_soc_pcm_runtime *fe = substream->private_data; 1722 struct snd_soc_dpcm *dpcm; 1723 int stream = substream->stream; 1724 1725 if (!fe->dai_link->dpcm_merged_chan) 1726 return; 1727 1728 /* 1729 * It returns merged BE codec channel; 1730 * if FE want to use it (= dpcm_merged_chan) 1731 */ 1732 1733 for_each_dpcm_be(fe, stream, dpcm) { 1734 struct snd_soc_pcm_runtime *be = dpcm->be; 1735 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver; 1736 struct snd_soc_dai_driver *codec_dai_drv; 1737 struct snd_soc_pcm_stream *codec_stream; 1738 struct snd_soc_pcm_stream *cpu_stream; 1739 1740 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1741 cpu_stream = &cpu_dai_drv->playback; 1742 else 1743 cpu_stream = &cpu_dai_drv->capture; 1744 1745 *channels_min = max(*channels_min, cpu_stream->channels_min); 1746 *channels_max = min(*channels_max, cpu_stream->channels_max); 1747 1748 /* 1749 * chan min/max cannot be enforced if there are multiple CODEC 1750 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1751 */ 1752 if (be->num_codecs == 1) { 1753 codec_dai_drv = be->codec_dais[0]->driver; 1754 1755 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1756 codec_stream = &codec_dai_drv->playback; 1757 else 1758 codec_stream = &codec_dai_drv->capture; 1759 1760 *channels_min = max(*channels_min, 1761 codec_stream->channels_min); 1762 *channels_max = min(*channels_max, 1763 codec_stream->channels_max); 1764 } 1765 } 1766 } 1767 1768 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream, 1769 unsigned int *rates, 1770 unsigned int *rate_min, 1771 unsigned int *rate_max) 1772 { 1773 struct snd_soc_pcm_runtime *fe = substream->private_data; 1774 struct snd_soc_dpcm *dpcm; 1775 int stream = substream->stream; 1776 1777 if (!fe->dai_link->dpcm_merged_rate) 1778 return; 1779 1780 /* 1781 * It returns merged BE codec channel; 1782 * if FE want to use it (= dpcm_merged_chan) 1783 */ 1784 1785 for_each_dpcm_be(fe, stream, dpcm) { 1786 struct snd_soc_pcm_runtime *be = dpcm->be; 1787 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver; 1788 struct snd_soc_dai_driver *codec_dai_drv; 1789 struct snd_soc_pcm_stream *codec_stream; 1790 struct snd_soc_pcm_stream *cpu_stream; 1791 struct snd_soc_dai *dai; 1792 int i; 1793 1794 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1795 cpu_stream = &cpu_dai_drv->playback; 1796 else 1797 cpu_stream = &cpu_dai_drv->capture; 1798 1799 *rate_min = max(*rate_min, cpu_stream->rate_min); 1800 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max); 1801 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates); 1802 1803 for_each_rtd_codec_dai(be, i, dai) { 1804 /* 1805 * Skip CODECs which don't support the current stream 1806 * type. See soc_pcm_init_runtime_hw() for more details 1807 */ 1808 if (!snd_soc_dai_stream_valid(dai, stream)) 1809 continue; 1810 1811 codec_dai_drv = dai->driver; 1812 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1813 codec_stream = &codec_dai_drv->playback; 1814 else 1815 codec_stream = &codec_dai_drv->capture; 1816 1817 *rate_min = max(*rate_min, codec_stream->rate_min); 1818 *rate_max = min_not_zero(*rate_max, 1819 codec_stream->rate_max); 1820 *rates = snd_pcm_rate_mask_intersect(*rates, 1821 codec_stream->rates); 1822 } 1823 } 1824 } 1825 1826 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1827 { 1828 struct snd_pcm_runtime *runtime = substream->runtime; 1829 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1830 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1831 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 1832 1833 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1834 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback); 1835 else 1836 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture); 1837 1838 dpcm_runtime_merge_format(substream, &runtime->hw.formats); 1839 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min, 1840 &runtime->hw.channels_max); 1841 dpcm_runtime_merge_rate(substream, &runtime->hw.rates, 1842 &runtime->hw.rate_min, &runtime->hw.rate_max); 1843 } 1844 1845 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 1846 1847 /* Set FE's runtime_update state; the state is protected via PCM stream lock 1848 * for avoiding the race with trigger callback. 1849 * If the state is unset and a trigger is pending while the previous operation, 1850 * process the pending trigger action here. 1851 */ 1852 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 1853 int stream, enum snd_soc_dpcm_update state) 1854 { 1855 struct snd_pcm_substream *substream = 1856 snd_soc_dpcm_get_substream(fe, stream); 1857 1858 snd_pcm_stream_lock_irq(substream); 1859 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 1860 dpcm_fe_dai_do_trigger(substream, 1861 fe->dpcm[stream].trigger_pending - 1); 1862 fe->dpcm[stream].trigger_pending = 0; 1863 } 1864 fe->dpcm[stream].runtime_update = state; 1865 snd_pcm_stream_unlock_irq(substream); 1866 } 1867 1868 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1869 int stream) 1870 { 1871 struct snd_soc_dpcm *dpcm; 1872 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1873 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai; 1874 int err; 1875 1876 /* apply symmetry for FE */ 1877 if (soc_pcm_has_symmetry(fe_substream)) 1878 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1879 1880 /* Symmetry only applies if we've got an active stream. */ 1881 if (fe_cpu_dai->active) { 1882 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1883 if (err < 0) 1884 return err; 1885 } 1886 1887 /* apply symmetry for BE */ 1888 for_each_dpcm_be(fe, stream, dpcm) { 1889 struct snd_soc_pcm_runtime *be = dpcm->be; 1890 struct snd_pcm_substream *be_substream = 1891 snd_soc_dpcm_get_substream(be, stream); 1892 struct snd_soc_pcm_runtime *rtd; 1893 struct snd_soc_dai *codec_dai; 1894 int i; 1895 1896 /* A backend may not have the requested substream */ 1897 if (!be_substream) 1898 continue; 1899 1900 rtd = be_substream->private_data; 1901 if (rtd->dai_link->be_hw_params_fixup) 1902 continue; 1903 1904 if (soc_pcm_has_symmetry(be_substream)) 1905 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1906 1907 /* Symmetry only applies if we've got an active stream. */ 1908 if (rtd->cpu_dai->active) { 1909 err = soc_pcm_apply_symmetry(fe_substream, 1910 rtd->cpu_dai); 1911 if (err < 0) 1912 return err; 1913 } 1914 1915 for_each_rtd_codec_dai(rtd, i, codec_dai) { 1916 if (codec_dai->active) { 1917 err = soc_pcm_apply_symmetry(fe_substream, 1918 codec_dai); 1919 if (err < 0) 1920 return err; 1921 } 1922 } 1923 } 1924 1925 return 0; 1926 } 1927 1928 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1929 { 1930 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1931 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1932 int stream = fe_substream->stream, ret = 0; 1933 1934 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1935 1936 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1937 if (ret < 0) { 1938 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1939 goto be_err; 1940 } 1941 1942 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1943 1944 /* start the DAI frontend */ 1945 ret = soc_pcm_open(fe_substream); 1946 if (ret < 0) { 1947 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 1948 goto unwind; 1949 } 1950 1951 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1952 1953 dpcm_set_fe_runtime(fe_substream); 1954 snd_pcm_limit_hw_rates(runtime); 1955 1956 ret = dpcm_apply_symmetry(fe_substream, stream); 1957 if (ret < 0) { 1958 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n", 1959 ret); 1960 goto unwind; 1961 } 1962 1963 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1964 return 0; 1965 1966 unwind: 1967 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1968 be_err: 1969 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1970 return ret; 1971 } 1972 1973 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1974 { 1975 struct snd_soc_dpcm *dpcm; 1976 1977 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 1978 for_each_dpcm_be(fe, stream, dpcm) { 1979 1980 struct snd_soc_pcm_runtime *be = dpcm->be; 1981 struct snd_pcm_substream *be_substream = 1982 snd_soc_dpcm_get_substream(be, stream); 1983 1984 /* is this op for this BE ? */ 1985 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1986 continue; 1987 1988 if (be->dpcm[stream].users == 0) 1989 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1990 stream ? "capture" : "playback", 1991 be->dpcm[stream].state); 1992 1993 if (--be->dpcm[stream].users != 0) 1994 continue; 1995 1996 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1997 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) { 1998 soc_pcm_hw_free(be_substream); 1999 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2000 } 2001 2002 dev_dbg(be->dev, "ASoC: close BE %s\n", 2003 be->dai_link->name); 2004 2005 soc_pcm_close(be_substream); 2006 be_substream->runtime = NULL; 2007 2008 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2009 } 2010 return 0; 2011 } 2012 2013 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 2014 { 2015 struct snd_soc_pcm_runtime *fe = substream->private_data; 2016 int stream = substream->stream; 2017 2018 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2019 2020 /* shutdown the BEs */ 2021 dpcm_be_dai_shutdown(fe, substream->stream); 2022 2023 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 2024 2025 /* now shutdown the frontend */ 2026 soc_pcm_close(substream); 2027 2028 /* run the stream event for each BE */ 2029 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 2030 2031 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2032 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2033 return 0; 2034 } 2035 2036 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 2037 { 2038 struct snd_soc_dpcm *dpcm; 2039 2040 /* only hw_params backends that are either sinks or sources 2041 * to this frontend DAI */ 2042 for_each_dpcm_be(fe, stream, dpcm) { 2043 2044 struct snd_soc_pcm_runtime *be = dpcm->be; 2045 struct snd_pcm_substream *be_substream = 2046 snd_soc_dpcm_get_substream(be, stream); 2047 2048 /* is this op for this BE ? */ 2049 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2050 continue; 2051 2052 /* only free hw when no longer used - check all FEs */ 2053 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2054 continue; 2055 2056 /* do not free hw if this BE is used by other FE */ 2057 if (be->dpcm[stream].users > 1) 2058 continue; 2059 2060 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2061 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2062 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2063 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2064 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2065 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2066 continue; 2067 2068 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2069 be->dai_link->name); 2070 2071 soc_pcm_hw_free(be_substream); 2072 2073 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2074 } 2075 2076 return 0; 2077 } 2078 2079 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2080 { 2081 struct snd_soc_pcm_runtime *fe = substream->private_data; 2082 int err, stream = substream->stream; 2083 2084 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2085 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2086 2087 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2088 2089 /* call hw_free on the frontend */ 2090 err = soc_pcm_hw_free(substream); 2091 if (err < 0) 2092 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 2093 fe->dai_link->name); 2094 2095 /* only hw_params backends that are either sinks or sources 2096 * to this frontend DAI */ 2097 err = dpcm_be_dai_hw_free(fe, stream); 2098 2099 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2100 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2101 2102 mutex_unlock(&fe->card->mutex); 2103 return 0; 2104 } 2105 2106 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2107 { 2108 struct snd_soc_dpcm *dpcm; 2109 int ret; 2110 2111 for_each_dpcm_be(fe, stream, dpcm) { 2112 2113 struct snd_soc_pcm_runtime *be = dpcm->be; 2114 struct snd_pcm_substream *be_substream = 2115 snd_soc_dpcm_get_substream(be, stream); 2116 2117 /* is this op for this BE ? */ 2118 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2119 continue; 2120 2121 /* copy params for each dpcm */ 2122 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 2123 sizeof(struct snd_pcm_hw_params)); 2124 2125 /* perform any hw_params fixups */ 2126 if (be->dai_link->be_hw_params_fixup) { 2127 ret = be->dai_link->be_hw_params_fixup(be, 2128 &dpcm->hw_params); 2129 if (ret < 0) { 2130 dev_err(be->dev, 2131 "ASoC: hw_params BE fixup failed %d\n", 2132 ret); 2133 goto unwind; 2134 } 2135 } 2136 2137 /* copy the fixed-up hw params for BE dai */ 2138 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 2139 sizeof(struct snd_pcm_hw_params)); 2140 2141 /* only allow hw_params() if no connected FEs are running */ 2142 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2143 continue; 2144 2145 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2146 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2147 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2148 continue; 2149 2150 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2151 be->dai_link->name); 2152 2153 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 2154 if (ret < 0) { 2155 dev_err(dpcm->be->dev, 2156 "ASoC: hw_params BE failed %d\n", ret); 2157 goto unwind; 2158 } 2159 2160 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2161 } 2162 return 0; 2163 2164 unwind: 2165 /* disable any enabled and non active backends */ 2166 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2167 struct snd_soc_pcm_runtime *be = dpcm->be; 2168 struct snd_pcm_substream *be_substream = 2169 snd_soc_dpcm_get_substream(be, stream); 2170 2171 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2172 continue; 2173 2174 /* only allow hw_free() if no connected FEs are running */ 2175 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2176 continue; 2177 2178 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2179 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2180 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2181 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2182 continue; 2183 2184 soc_pcm_hw_free(be_substream); 2185 } 2186 2187 return ret; 2188 } 2189 2190 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2191 struct snd_pcm_hw_params *params) 2192 { 2193 struct snd_soc_pcm_runtime *fe = substream->private_data; 2194 int ret, stream = substream->stream; 2195 2196 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2197 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2198 2199 memcpy(&fe->dpcm[substream->stream].hw_params, params, 2200 sizeof(struct snd_pcm_hw_params)); 2201 ret = dpcm_be_dai_hw_params(fe, substream->stream); 2202 if (ret < 0) { 2203 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 2204 goto out; 2205 } 2206 2207 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2208 fe->dai_link->name, params_rate(params), 2209 params_channels(params), params_format(params)); 2210 2211 /* call hw_params on the frontend */ 2212 ret = soc_pcm_hw_params(substream, params); 2213 if (ret < 0) { 2214 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 2215 dpcm_be_dai_hw_free(fe, stream); 2216 } else 2217 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2218 2219 out: 2220 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2221 mutex_unlock(&fe->card->mutex); 2222 return ret; 2223 } 2224 2225 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 2226 struct snd_pcm_substream *substream, int cmd) 2227 { 2228 int ret; 2229 2230 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 2231 dpcm->be->dai_link->name, cmd); 2232 2233 ret = soc_pcm_trigger(substream, cmd); 2234 if (ret < 0) 2235 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 2236 2237 return ret; 2238 } 2239 2240 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2241 int cmd) 2242 { 2243 struct snd_soc_dpcm *dpcm; 2244 int ret = 0; 2245 2246 for_each_dpcm_be(fe, stream, dpcm) { 2247 2248 struct snd_soc_pcm_runtime *be = dpcm->be; 2249 struct snd_pcm_substream *be_substream = 2250 snd_soc_dpcm_get_substream(be, stream); 2251 2252 /* is this op for this BE ? */ 2253 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2254 continue; 2255 2256 switch (cmd) { 2257 case SNDRV_PCM_TRIGGER_START: 2258 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2259 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2260 continue; 2261 2262 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2263 if (ret) 2264 return ret; 2265 2266 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2267 break; 2268 case SNDRV_PCM_TRIGGER_RESUME: 2269 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2270 continue; 2271 2272 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2273 if (ret) 2274 return ret; 2275 2276 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2277 break; 2278 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2279 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2280 continue; 2281 2282 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2283 if (ret) 2284 return ret; 2285 2286 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2287 break; 2288 case SNDRV_PCM_TRIGGER_STOP: 2289 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2290 continue; 2291 2292 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2293 continue; 2294 2295 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2296 if (ret) 2297 return ret; 2298 2299 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2300 break; 2301 case SNDRV_PCM_TRIGGER_SUSPEND: 2302 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2303 continue; 2304 2305 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2306 continue; 2307 2308 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2309 if (ret) 2310 return ret; 2311 2312 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2313 break; 2314 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2315 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2316 continue; 2317 2318 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2319 continue; 2320 2321 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2322 if (ret) 2323 return ret; 2324 2325 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2326 break; 2327 } 2328 } 2329 2330 return ret; 2331 } 2332 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2333 2334 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2335 int cmd, bool fe_first) 2336 { 2337 struct snd_soc_pcm_runtime *fe = substream->private_data; 2338 int ret; 2339 2340 /* call trigger on the frontend before the backend. */ 2341 if (fe_first) { 2342 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2343 fe->dai_link->name, cmd); 2344 2345 ret = soc_pcm_trigger(substream, cmd); 2346 if (ret < 0) 2347 return ret; 2348 2349 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2350 return ret; 2351 } 2352 2353 /* call trigger on the frontend after the backend. */ 2354 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2355 if (ret < 0) 2356 return ret; 2357 2358 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2359 fe->dai_link->name, cmd); 2360 2361 ret = soc_pcm_trigger(substream, cmd); 2362 2363 return ret; 2364 } 2365 2366 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2367 { 2368 struct snd_soc_pcm_runtime *fe = substream->private_data; 2369 int stream = substream->stream; 2370 int ret = 0; 2371 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2372 2373 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2374 2375 switch (trigger) { 2376 case SND_SOC_DPCM_TRIGGER_PRE: 2377 switch (cmd) { 2378 case SNDRV_PCM_TRIGGER_START: 2379 case SNDRV_PCM_TRIGGER_RESUME: 2380 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2381 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2382 break; 2383 case SNDRV_PCM_TRIGGER_STOP: 2384 case SNDRV_PCM_TRIGGER_SUSPEND: 2385 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2386 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2387 break; 2388 default: 2389 ret = -EINVAL; 2390 break; 2391 } 2392 break; 2393 case SND_SOC_DPCM_TRIGGER_POST: 2394 switch (cmd) { 2395 case SNDRV_PCM_TRIGGER_START: 2396 case SNDRV_PCM_TRIGGER_RESUME: 2397 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2398 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2399 break; 2400 case SNDRV_PCM_TRIGGER_STOP: 2401 case SNDRV_PCM_TRIGGER_SUSPEND: 2402 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2403 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2404 break; 2405 default: 2406 ret = -EINVAL; 2407 break; 2408 } 2409 break; 2410 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2411 /* bespoke trigger() - handles both FE and BEs */ 2412 2413 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2414 fe->dai_link->name, cmd); 2415 2416 ret = soc_pcm_bespoke_trigger(substream, cmd); 2417 break; 2418 default: 2419 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2420 fe->dai_link->name); 2421 ret = -EINVAL; 2422 goto out; 2423 } 2424 2425 if (ret < 0) { 2426 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2427 cmd, ret); 2428 goto out; 2429 } 2430 2431 switch (cmd) { 2432 case SNDRV_PCM_TRIGGER_START: 2433 case SNDRV_PCM_TRIGGER_RESUME: 2434 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2435 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2436 break; 2437 case SNDRV_PCM_TRIGGER_STOP: 2438 case SNDRV_PCM_TRIGGER_SUSPEND: 2439 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2440 break; 2441 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2442 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2443 break; 2444 } 2445 2446 out: 2447 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2448 return ret; 2449 } 2450 2451 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2452 { 2453 struct snd_soc_pcm_runtime *fe = substream->private_data; 2454 int stream = substream->stream; 2455 2456 /* if FE's runtime_update is already set, we're in race; 2457 * process this trigger later at exit 2458 */ 2459 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2460 fe->dpcm[stream].trigger_pending = cmd + 1; 2461 return 0; /* delayed, assuming it's successful */ 2462 } 2463 2464 /* we're alone, let's trigger */ 2465 return dpcm_fe_dai_do_trigger(substream, cmd); 2466 } 2467 2468 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2469 { 2470 struct snd_soc_dpcm *dpcm; 2471 int ret = 0; 2472 2473 for_each_dpcm_be(fe, stream, dpcm) { 2474 2475 struct snd_soc_pcm_runtime *be = dpcm->be; 2476 struct snd_pcm_substream *be_substream = 2477 snd_soc_dpcm_get_substream(be, stream); 2478 2479 /* is this op for this BE ? */ 2480 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2481 continue; 2482 2483 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2484 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2485 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2486 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2487 continue; 2488 2489 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2490 be->dai_link->name); 2491 2492 ret = soc_pcm_prepare(be_substream); 2493 if (ret < 0) { 2494 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2495 ret); 2496 break; 2497 } 2498 2499 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2500 } 2501 return ret; 2502 } 2503 2504 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2505 { 2506 struct snd_soc_pcm_runtime *fe = substream->private_data; 2507 int stream = substream->stream, ret = 0; 2508 2509 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2510 2511 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2512 2513 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2514 2515 /* there is no point preparing this FE if there are no BEs */ 2516 if (list_empty(&fe->dpcm[stream].be_clients)) { 2517 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2518 fe->dai_link->name); 2519 ret = -EINVAL; 2520 goto out; 2521 } 2522 2523 ret = dpcm_be_dai_prepare(fe, substream->stream); 2524 if (ret < 0) 2525 goto out; 2526 2527 /* call prepare on the frontend */ 2528 ret = soc_pcm_prepare(substream); 2529 if (ret < 0) { 2530 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2531 fe->dai_link->name); 2532 goto out; 2533 } 2534 2535 /* run the stream event for each BE */ 2536 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2537 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2538 2539 out: 2540 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2541 mutex_unlock(&fe->card->mutex); 2542 2543 return ret; 2544 } 2545 2546 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2547 { 2548 struct snd_pcm_substream *substream = 2549 snd_soc_dpcm_get_substream(fe, stream); 2550 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2551 int err; 2552 2553 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2554 stream ? "capture" : "playback", fe->dai_link->name); 2555 2556 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2557 /* call bespoke trigger - FE takes care of all BE triggers */ 2558 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2559 fe->dai_link->name); 2560 2561 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2562 if (err < 0) 2563 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2564 } else { 2565 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2566 fe->dai_link->name); 2567 2568 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2569 if (err < 0) 2570 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2571 } 2572 2573 err = dpcm_be_dai_hw_free(fe, stream); 2574 if (err < 0) 2575 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2576 2577 err = dpcm_be_dai_shutdown(fe, stream); 2578 if (err < 0) 2579 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2580 2581 /* run the stream event for each BE */ 2582 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2583 2584 return 0; 2585 } 2586 2587 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2588 { 2589 struct snd_pcm_substream *substream = 2590 snd_soc_dpcm_get_substream(fe, stream); 2591 struct snd_soc_dpcm *dpcm; 2592 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2593 int ret; 2594 unsigned long flags; 2595 2596 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2597 stream ? "capture" : "playback", fe->dai_link->name); 2598 2599 /* Only start the BE if the FE is ready */ 2600 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2601 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2602 return -EINVAL; 2603 2604 /* startup must always be called for new BEs */ 2605 ret = dpcm_be_dai_startup(fe, stream); 2606 if (ret < 0) 2607 goto disconnect; 2608 2609 /* keep going if FE state is > open */ 2610 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2611 return 0; 2612 2613 ret = dpcm_be_dai_hw_params(fe, stream); 2614 if (ret < 0) 2615 goto close; 2616 2617 /* keep going if FE state is > hw_params */ 2618 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2619 return 0; 2620 2621 2622 ret = dpcm_be_dai_prepare(fe, stream); 2623 if (ret < 0) 2624 goto hw_free; 2625 2626 /* run the stream event for each BE */ 2627 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2628 2629 /* keep going if FE state is > prepare */ 2630 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2631 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2632 return 0; 2633 2634 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2635 /* call trigger on the frontend - FE takes care of all BE triggers */ 2636 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2637 fe->dai_link->name); 2638 2639 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2640 if (ret < 0) { 2641 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2642 goto hw_free; 2643 } 2644 } else { 2645 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2646 fe->dai_link->name); 2647 2648 ret = dpcm_be_dai_trigger(fe, stream, 2649 SNDRV_PCM_TRIGGER_START); 2650 if (ret < 0) { 2651 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2652 goto hw_free; 2653 } 2654 } 2655 2656 return 0; 2657 2658 hw_free: 2659 dpcm_be_dai_hw_free(fe, stream); 2660 close: 2661 dpcm_be_dai_shutdown(fe, stream); 2662 disconnect: 2663 /* disconnect any non started BEs */ 2664 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2665 for_each_dpcm_be(fe, stream, dpcm) { 2666 struct snd_soc_pcm_runtime *be = dpcm->be; 2667 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2668 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2669 } 2670 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2671 2672 return ret; 2673 } 2674 2675 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2676 { 2677 int ret; 2678 2679 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2680 ret = dpcm_run_update_startup(fe, stream); 2681 if (ret < 0) 2682 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2683 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2684 2685 return ret; 2686 } 2687 2688 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2689 { 2690 int ret; 2691 2692 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2693 ret = dpcm_run_update_shutdown(fe, stream); 2694 if (ret < 0) 2695 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2696 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2697 2698 return ret; 2699 } 2700 2701 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2702 { 2703 struct snd_soc_dapm_widget_list *list; 2704 int count, paths; 2705 2706 if (!fe->dai_link->dynamic) 2707 return 0; 2708 2709 /* only check active links */ 2710 if (!fe->cpu_dai->active) 2711 return 0; 2712 2713 /* DAPM sync will call this to update DSP paths */ 2714 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2715 new ? "new" : "old", fe->dai_link->name); 2716 2717 /* skip if FE doesn't have playback capability */ 2718 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) || 2719 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK)) 2720 goto capture; 2721 2722 /* skip if FE isn't currently playing */ 2723 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active) 2724 goto capture; 2725 2726 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2727 if (paths < 0) { 2728 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2729 fe->dai_link->name, "playback"); 2730 return paths; 2731 } 2732 2733 /* update any playback paths */ 2734 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new); 2735 if (count) { 2736 if (new) 2737 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2738 else 2739 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2740 2741 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2742 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2743 } 2744 2745 dpcm_path_put(&list); 2746 2747 capture: 2748 /* skip if FE doesn't have capture capability */ 2749 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) || 2750 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE)) 2751 return 0; 2752 2753 /* skip if FE isn't currently capturing */ 2754 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active) 2755 return 0; 2756 2757 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2758 if (paths < 0) { 2759 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2760 fe->dai_link->name, "capture"); 2761 return paths; 2762 } 2763 2764 /* update any old capture paths */ 2765 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new); 2766 if (count) { 2767 if (new) 2768 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2769 else 2770 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2771 2772 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2773 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2774 } 2775 2776 dpcm_path_put(&list); 2777 2778 return 0; 2779 } 2780 2781 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2782 * any DAI links. 2783 */ 2784 int soc_dpcm_runtime_update(struct snd_soc_card *card) 2785 { 2786 struct snd_soc_pcm_runtime *fe; 2787 int ret = 0; 2788 2789 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2790 /* shutdown all old paths first */ 2791 for_each_card_rtds(card, fe) { 2792 ret = soc_dpcm_fe_runtime_update(fe, 0); 2793 if (ret) 2794 goto out; 2795 } 2796 2797 /* bring new paths up */ 2798 for_each_card_rtds(card, fe) { 2799 ret = soc_dpcm_fe_runtime_update(fe, 1); 2800 if (ret) 2801 goto out; 2802 } 2803 2804 out: 2805 mutex_unlock(&card->mutex); 2806 return ret; 2807 } 2808 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2809 { 2810 struct snd_soc_dpcm *dpcm; 2811 struct snd_soc_dai *dai; 2812 2813 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) { 2814 2815 struct snd_soc_pcm_runtime *be = dpcm->be; 2816 int i; 2817 2818 if (be->dai_link->ignore_suspend) 2819 continue; 2820 2821 for_each_rtd_codec_dai(be, i, dai) { 2822 struct snd_soc_dai_driver *drv = dai->driver; 2823 2824 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2825 be->dai_link->name); 2826 2827 if (drv->ops && drv->ops->digital_mute && 2828 dai->playback_active) 2829 drv->ops->digital_mute(dai, mute); 2830 } 2831 } 2832 2833 return 0; 2834 } 2835 2836 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2837 { 2838 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2839 struct snd_soc_dpcm *dpcm; 2840 struct snd_soc_dapm_widget_list *list; 2841 int ret; 2842 int stream = fe_substream->stream; 2843 2844 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2845 fe->dpcm[stream].runtime = fe_substream->runtime; 2846 2847 ret = dpcm_path_get(fe, stream, &list); 2848 if (ret < 0) { 2849 mutex_unlock(&fe->card->mutex); 2850 return ret; 2851 } else if (ret == 0) { 2852 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2853 fe->dai_link->name, stream ? "capture" : "playback"); 2854 } 2855 2856 /* calculate valid and active FE <-> BE dpcms */ 2857 dpcm_process_paths(fe, stream, &list, 1); 2858 2859 ret = dpcm_fe_dai_startup(fe_substream); 2860 if (ret < 0) { 2861 /* clean up all links */ 2862 for_each_dpcm_be(fe, stream, dpcm) 2863 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2864 2865 dpcm_be_disconnect(fe, stream); 2866 fe->dpcm[stream].runtime = NULL; 2867 } 2868 2869 dpcm_clear_pending_state(fe, stream); 2870 dpcm_path_put(&list); 2871 mutex_unlock(&fe->card->mutex); 2872 return ret; 2873 } 2874 2875 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2876 { 2877 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2878 struct snd_soc_dpcm *dpcm; 2879 int stream = fe_substream->stream, ret; 2880 2881 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2882 ret = dpcm_fe_dai_shutdown(fe_substream); 2883 2884 /* mark FE's links ready to prune */ 2885 for_each_dpcm_be(fe, stream, dpcm) 2886 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2887 2888 dpcm_be_disconnect(fe, stream); 2889 2890 fe->dpcm[stream].runtime = NULL; 2891 mutex_unlock(&fe->card->mutex); 2892 return ret; 2893 } 2894 2895 /* create a new pcm */ 2896 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2897 { 2898 struct snd_soc_dai *codec_dai; 2899 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2900 struct snd_soc_rtdcom_list *rtdcom; 2901 struct snd_soc_component *component; 2902 struct snd_pcm *pcm; 2903 char new_name[64]; 2904 int ret = 0, playback = 0, capture = 0; 2905 int i; 2906 2907 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2908 playback = rtd->dai_link->dpcm_playback; 2909 capture = rtd->dai_link->dpcm_capture; 2910 } else { 2911 /* Adapt stream for codec2codec links */ 2912 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ? 2913 &cpu_dai->driver->playback : &cpu_dai->driver->capture; 2914 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ? 2915 &cpu_dai->driver->capture : &cpu_dai->driver->playback; 2916 2917 for_each_rtd_codec_dai(rtd, i, codec_dai) { 2918 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2919 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK)) 2920 playback = 1; 2921 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2922 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE)) 2923 capture = 1; 2924 } 2925 2926 capture = capture && cpu_capture->channels_min; 2927 playback = playback && cpu_playback->channels_min; 2928 } 2929 2930 if (rtd->dai_link->playback_only) { 2931 playback = 1; 2932 capture = 0; 2933 } 2934 2935 if (rtd->dai_link->capture_only) { 2936 playback = 0; 2937 capture = 1; 2938 } 2939 2940 /* create the PCM */ 2941 if (rtd->dai_link->params) { 2942 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2943 rtd->dai_link->stream_name); 2944 2945 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2946 playback, capture, &pcm); 2947 } else if (rtd->dai_link->no_pcm) { 2948 snprintf(new_name, sizeof(new_name), "(%s)", 2949 rtd->dai_link->stream_name); 2950 2951 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2952 playback, capture, &pcm); 2953 } else { 2954 if (rtd->dai_link->dynamic) 2955 snprintf(new_name, sizeof(new_name), "%s (*)", 2956 rtd->dai_link->stream_name); 2957 else 2958 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2959 rtd->dai_link->stream_name, 2960 (rtd->num_codecs > 1) ? 2961 "multicodec" : rtd->codec_dai->name, num); 2962 2963 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2964 capture, &pcm); 2965 } 2966 if (ret < 0) { 2967 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2968 rtd->dai_link->name); 2969 return ret; 2970 } 2971 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2972 2973 /* DAPM dai link stream work */ 2974 if (rtd->dai_link->params) 2975 rtd->close_delayed_work_func = codec2codec_close_delayed_work; 2976 else 2977 rtd->close_delayed_work_func = close_delayed_work; 2978 2979 pcm->nonatomic = rtd->dai_link->nonatomic; 2980 rtd->pcm = pcm; 2981 pcm->private_data = rtd; 2982 2983 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2984 if (playback) 2985 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2986 if (capture) 2987 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2988 goto out; 2989 } 2990 2991 /* ASoC PCM operations */ 2992 if (rtd->dai_link->dynamic) { 2993 rtd->ops.open = dpcm_fe_dai_open; 2994 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2995 rtd->ops.prepare = dpcm_fe_dai_prepare; 2996 rtd->ops.trigger = dpcm_fe_dai_trigger; 2997 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2998 rtd->ops.close = dpcm_fe_dai_close; 2999 rtd->ops.pointer = soc_pcm_pointer; 3000 } else { 3001 rtd->ops.open = soc_pcm_open; 3002 rtd->ops.hw_params = soc_pcm_hw_params; 3003 rtd->ops.prepare = soc_pcm_prepare; 3004 rtd->ops.trigger = soc_pcm_trigger; 3005 rtd->ops.hw_free = soc_pcm_hw_free; 3006 rtd->ops.close = soc_pcm_close; 3007 rtd->ops.pointer = soc_pcm_pointer; 3008 } 3009 3010 for_each_rtd_components(rtd, rtdcom, component) { 3011 const struct snd_soc_component_driver *drv = component->driver; 3012 3013 if (drv->ioctl) 3014 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 3015 if (drv->sync_stop) 3016 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 3017 if (drv->copy_user) 3018 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 3019 if (drv->page) 3020 rtd->ops.page = snd_soc_pcm_component_page; 3021 if (drv->mmap) 3022 rtd->ops.mmap = snd_soc_pcm_component_mmap; 3023 } 3024 3025 if (playback) 3026 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 3027 3028 if (capture) 3029 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 3030 3031 ret = snd_soc_pcm_component_new(rtd); 3032 if (ret < 0) { 3033 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret); 3034 return ret; 3035 } 3036 3037 pcm->no_device_suspend = true; 3038 out: 3039 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 3040 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 3041 cpu_dai->name); 3042 return ret; 3043 } 3044 3045 /* is the current PCM operation for this FE ? */ 3046 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 3047 { 3048 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 3049 return 1; 3050 return 0; 3051 } 3052 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 3053 3054 /* is the current PCM operation for this BE ? */ 3055 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 3056 struct snd_soc_pcm_runtime *be, int stream) 3057 { 3058 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 3059 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 3060 be->dpcm[stream].runtime_update)) 3061 return 1; 3062 return 0; 3063 } 3064 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 3065 3066 /* get the substream for this BE */ 3067 struct snd_pcm_substream * 3068 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3069 { 3070 return be->pcm->streams[stream].substream; 3071 } 3072 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3073 3074 /* get the BE runtime state */ 3075 enum snd_soc_dpcm_state 3076 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 3077 { 3078 return be->dpcm[stream].state; 3079 } 3080 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 3081 3082 /* set the BE runtime state */ 3083 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 3084 int stream, enum snd_soc_dpcm_state state) 3085 { 3086 be->dpcm[stream].state = state; 3087 } 3088 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 3089 3090 /* 3091 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3092 * are not running, paused or suspended for the specified stream direction. 3093 */ 3094 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3095 struct snd_soc_pcm_runtime *be, int stream) 3096 { 3097 struct snd_soc_dpcm *dpcm; 3098 int state; 3099 int ret = 1; 3100 unsigned long flags; 3101 3102 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3103 for_each_dpcm_fe(be, stream, dpcm) { 3104 3105 if (dpcm->fe == fe) 3106 continue; 3107 3108 state = dpcm->fe->dpcm[stream].state; 3109 if (state == SND_SOC_DPCM_STATE_START || 3110 state == SND_SOC_DPCM_STATE_PAUSED || 3111 state == SND_SOC_DPCM_STATE_SUSPEND) { 3112 ret = 0; 3113 break; 3114 } 3115 } 3116 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3117 3118 /* it's safe to free/stop this BE DAI */ 3119 return ret; 3120 } 3121 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3122 3123 /* 3124 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3125 * running, paused or suspended for the specified stream direction. 3126 */ 3127 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3128 struct snd_soc_pcm_runtime *be, int stream) 3129 { 3130 struct snd_soc_dpcm *dpcm; 3131 int state; 3132 int ret = 1; 3133 unsigned long flags; 3134 3135 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3136 for_each_dpcm_fe(be, stream, dpcm) { 3137 3138 if (dpcm->fe == fe) 3139 continue; 3140 3141 state = dpcm->fe->dpcm[stream].state; 3142 if (state == SND_SOC_DPCM_STATE_START || 3143 state == SND_SOC_DPCM_STATE_PAUSED || 3144 state == SND_SOC_DPCM_STATE_SUSPEND || 3145 state == SND_SOC_DPCM_STATE_PREPARE) { 3146 ret = 0; 3147 break; 3148 } 3149 } 3150 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3151 3152 /* it's safe to change hw_params */ 3153 return ret; 3154 } 3155 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3156 3157 #ifdef CONFIG_DEBUG_FS 3158 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 3159 { 3160 switch (state) { 3161 case SND_SOC_DPCM_STATE_NEW: 3162 return "new"; 3163 case SND_SOC_DPCM_STATE_OPEN: 3164 return "open"; 3165 case SND_SOC_DPCM_STATE_HW_PARAMS: 3166 return "hw_params"; 3167 case SND_SOC_DPCM_STATE_PREPARE: 3168 return "prepare"; 3169 case SND_SOC_DPCM_STATE_START: 3170 return "start"; 3171 case SND_SOC_DPCM_STATE_STOP: 3172 return "stop"; 3173 case SND_SOC_DPCM_STATE_SUSPEND: 3174 return "suspend"; 3175 case SND_SOC_DPCM_STATE_PAUSED: 3176 return "paused"; 3177 case SND_SOC_DPCM_STATE_HW_FREE: 3178 return "hw_free"; 3179 case SND_SOC_DPCM_STATE_CLOSE: 3180 return "close"; 3181 } 3182 3183 return "unknown"; 3184 } 3185 3186 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 3187 int stream, char *buf, size_t size) 3188 { 3189 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 3190 struct snd_soc_dpcm *dpcm; 3191 ssize_t offset = 0; 3192 unsigned long flags; 3193 3194 /* FE state */ 3195 offset += snprintf(buf + offset, size - offset, 3196 "[%s - %s]\n", fe->dai_link->name, 3197 stream ? "Capture" : "Playback"); 3198 3199 offset += snprintf(buf + offset, size - offset, "State: %s\n", 3200 dpcm_state_string(fe->dpcm[stream].state)); 3201 3202 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3203 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3204 offset += snprintf(buf + offset, size - offset, 3205 "Hardware Params: " 3206 "Format = %s, Channels = %d, Rate = %d\n", 3207 snd_pcm_format_name(params_format(params)), 3208 params_channels(params), 3209 params_rate(params)); 3210 3211 /* BEs state */ 3212 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 3213 3214 if (list_empty(&fe->dpcm[stream].be_clients)) { 3215 offset += snprintf(buf + offset, size - offset, 3216 " No active DSP links\n"); 3217 goto out; 3218 } 3219 3220 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3221 for_each_dpcm_be(fe, stream, dpcm) { 3222 struct snd_soc_pcm_runtime *be = dpcm->be; 3223 params = &dpcm->hw_params; 3224 3225 offset += snprintf(buf + offset, size - offset, 3226 "- %s\n", be->dai_link->name); 3227 3228 offset += snprintf(buf + offset, size - offset, 3229 " State: %s\n", 3230 dpcm_state_string(be->dpcm[stream].state)); 3231 3232 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3233 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3234 offset += snprintf(buf + offset, size - offset, 3235 " Hardware Params: " 3236 "Format = %s, Channels = %d, Rate = %d\n", 3237 snd_pcm_format_name(params_format(params)), 3238 params_channels(params), 3239 params_rate(params)); 3240 } 3241 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3242 out: 3243 return offset; 3244 } 3245 3246 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 3247 size_t count, loff_t *ppos) 3248 { 3249 struct snd_soc_pcm_runtime *fe = file->private_data; 3250 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 3251 char *buf; 3252 3253 buf = kmalloc(out_count, GFP_KERNEL); 3254 if (!buf) 3255 return -ENOMEM; 3256 3257 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK)) 3258 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 3259 buf + offset, out_count - offset); 3260 3261 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE)) 3262 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 3263 buf + offset, out_count - offset); 3264 3265 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 3266 3267 kfree(buf); 3268 return ret; 3269 } 3270 3271 static const struct file_operations dpcm_state_fops = { 3272 .open = simple_open, 3273 .read = dpcm_state_read_file, 3274 .llseek = default_llseek, 3275 }; 3276 3277 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 3278 { 3279 if (!rtd->dai_link) 3280 return; 3281 3282 if (!rtd->dai_link->dynamic) 3283 return; 3284 3285 if (!rtd->card->debugfs_card_root) 3286 return; 3287 3288 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 3289 rtd->card->debugfs_card_root); 3290 3291 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 3292 rtd, &dpcm_state_fops); 3293 } 3294 #endif 3295