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