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