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 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1396 1397 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1398 list_for_each_entry(be, &card->rtd_list, list) { 1399 1400 if (!be->dai_link->no_pcm) 1401 continue; 1402 1403 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1404 be->cpu_dai->playback_widget ? 1405 be->cpu_dai->playback_widget->name : "(not set)"); 1406 1407 if (be->cpu_dai->playback_widget == widget) 1408 return be; 1409 1410 for (i = 0; i < be->num_codecs; i++) { 1411 struct snd_soc_dai *dai = be->codec_dais[i]; 1412 if (dai->playback_widget == widget) 1413 return be; 1414 } 1415 } 1416 } else { 1417 1418 list_for_each_entry(be, &card->rtd_list, list) { 1419 1420 if (!be->dai_link->no_pcm) 1421 continue; 1422 1423 dev_dbg(card->dev, "ASoC: try BE %s\n", 1424 be->cpu_dai->capture_widget ? 1425 be->cpu_dai->capture_widget->name : "(not set)"); 1426 1427 if (be->cpu_dai->capture_widget == widget) 1428 return be; 1429 1430 for (i = 0; i < be->num_codecs; i++) { 1431 struct snd_soc_dai *dai = be->codec_dais[i]; 1432 if (dai->capture_widget == widget) 1433 return be; 1434 } 1435 } 1436 } 1437 1438 /* dai link name and stream name set correctly ? */ 1439 dev_err(card->dev, "ASoC: can't get %s BE for %s\n", 1440 stream ? "capture" : "playback", widget->name); 1441 return NULL; 1442 } 1443 1444 static inline struct snd_soc_dapm_widget * 1445 dai_get_widget(struct snd_soc_dai *dai, int stream) 1446 { 1447 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1448 return dai->playback_widget; 1449 else 1450 return dai->capture_widget; 1451 } 1452 1453 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1454 struct snd_soc_dapm_widget *widget) 1455 { 1456 int i; 1457 1458 for (i = 0; i < list->num_widgets; i++) { 1459 if (widget == list->widgets[i]) 1460 return 1; 1461 } 1462 1463 return 0; 1464 } 1465 1466 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, 1467 enum snd_soc_dapm_direction dir) 1468 { 1469 struct snd_soc_card *card = widget->dapm->card; 1470 struct snd_soc_pcm_runtime *rtd; 1471 int i; 1472 1473 if (dir == SND_SOC_DAPM_DIR_OUT) { 1474 list_for_each_entry(rtd, &card->rtd_list, list) { 1475 if (!rtd->dai_link->no_pcm) 1476 continue; 1477 1478 if (rtd->cpu_dai->playback_widget == widget) 1479 return true; 1480 1481 for (i = 0; i < rtd->num_codecs; ++i) { 1482 struct snd_soc_dai *dai = rtd->codec_dais[i]; 1483 if (dai->playback_widget == widget) 1484 return true; 1485 } 1486 } 1487 } else { /* SND_SOC_DAPM_DIR_IN */ 1488 list_for_each_entry(rtd, &card->rtd_list, list) { 1489 if (!rtd->dai_link->no_pcm) 1490 continue; 1491 1492 if (rtd->cpu_dai->capture_widget == widget) 1493 return true; 1494 1495 for (i = 0; i < rtd->num_codecs; ++i) { 1496 struct snd_soc_dai *dai = rtd->codec_dais[i]; 1497 if (dai->capture_widget == widget) 1498 return true; 1499 } 1500 } 1501 } 1502 1503 return false; 1504 } 1505 1506 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1507 int stream, struct snd_soc_dapm_widget_list **list) 1508 { 1509 struct snd_soc_dai *cpu_dai = fe->cpu_dai; 1510 int paths; 1511 1512 /* get number of valid DAI paths and their widgets */ 1513 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1514 dpcm_end_walk_at_be); 1515 1516 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1517 stream ? "capture" : "playback"); 1518 1519 return paths; 1520 } 1521 1522 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1523 struct snd_soc_dapm_widget_list **list_) 1524 { 1525 struct snd_soc_dpcm *dpcm; 1526 struct snd_soc_dapm_widget_list *list = *list_; 1527 struct snd_soc_dapm_widget *widget; 1528 int prune = 0; 1529 1530 /* Destroy any old FE <--> BE connections */ 1531 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1532 unsigned int i; 1533 1534 /* is there a valid CPU DAI widget for this BE */ 1535 widget = dai_get_widget(dpcm->be->cpu_dai, stream); 1536 1537 /* prune the BE if it's no longer in our active list */ 1538 if (widget && widget_in_list(list, widget)) 1539 continue; 1540 1541 /* is there a valid CODEC DAI widget for this BE */ 1542 for (i = 0; i < dpcm->be->num_codecs; i++) { 1543 struct snd_soc_dai *dai = dpcm->be->codec_dais[i]; 1544 widget = dai_get_widget(dai, stream); 1545 1546 /* prune the BE if it's no longer in our active list */ 1547 if (widget && widget_in_list(list, widget)) 1548 continue; 1549 } 1550 1551 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1552 stream ? "capture" : "playback", 1553 dpcm->be->dai_link->name, fe->dai_link->name); 1554 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1555 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1556 prune++; 1557 } 1558 1559 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1560 return prune; 1561 } 1562 1563 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1564 struct snd_soc_dapm_widget_list **list_) 1565 { 1566 struct snd_soc_card *card = fe->card; 1567 struct snd_soc_dapm_widget_list *list = *list_; 1568 struct snd_soc_pcm_runtime *be; 1569 int i, new = 0, err; 1570 1571 /* Create any new FE <--> BE connections */ 1572 for (i = 0; i < list->num_widgets; i++) { 1573 1574 switch (list->widgets[i]->id) { 1575 case snd_soc_dapm_dai_in: 1576 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1577 continue; 1578 break; 1579 case snd_soc_dapm_dai_out: 1580 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1581 continue; 1582 break; 1583 default: 1584 continue; 1585 } 1586 1587 /* is there a valid BE rtd for this widget */ 1588 be = dpcm_get_be(card, list->widgets[i], stream); 1589 if (!be) { 1590 dev_err(fe->dev, "ASoC: no BE found for %s\n", 1591 list->widgets[i]->name); 1592 continue; 1593 } 1594 1595 /* make sure BE is a real BE */ 1596 if (!be->dai_link->no_pcm) 1597 continue; 1598 1599 /* don't connect if FE is not running */ 1600 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1601 continue; 1602 1603 /* newly connected FE and BE */ 1604 err = dpcm_be_connect(fe, be, stream); 1605 if (err < 0) { 1606 dev_err(fe->dev, "ASoC: can't connect %s\n", 1607 list->widgets[i]->name); 1608 break; 1609 } else if (err == 0) /* already connected */ 1610 continue; 1611 1612 /* new */ 1613 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1614 new++; 1615 } 1616 1617 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1618 return new; 1619 } 1620 1621 /* 1622 * Find the corresponding BE DAIs that source or sink audio to this 1623 * FE substream. 1624 */ 1625 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1626 int stream, struct snd_soc_dapm_widget_list **list, int new) 1627 { 1628 if (new) 1629 return dpcm_add_paths(fe, stream, list); 1630 else 1631 return dpcm_prune_paths(fe, stream, list); 1632 } 1633 1634 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1635 { 1636 struct snd_soc_dpcm *dpcm; 1637 1638 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 1639 dpcm->be->dpcm[stream].runtime_update = 1640 SND_SOC_DPCM_UPDATE_NO; 1641 } 1642 1643 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1644 int stream) 1645 { 1646 struct snd_soc_dpcm *dpcm; 1647 1648 /* disable any enabled and non active backends */ 1649 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1650 1651 struct snd_soc_pcm_runtime *be = dpcm->be; 1652 struct snd_pcm_substream *be_substream = 1653 snd_soc_dpcm_get_substream(be, stream); 1654 1655 if (be->dpcm[stream].users == 0) 1656 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1657 stream ? "capture" : "playback", 1658 be->dpcm[stream].state); 1659 1660 if (--be->dpcm[stream].users != 0) 1661 continue; 1662 1663 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1664 continue; 1665 1666 soc_pcm_close(be_substream); 1667 be_substream->runtime = NULL; 1668 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1669 } 1670 } 1671 1672 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1673 { 1674 struct snd_soc_dpcm *dpcm; 1675 int err, count = 0; 1676 1677 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1678 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1679 1680 struct snd_soc_pcm_runtime *be = dpcm->be; 1681 struct snd_pcm_substream *be_substream = 1682 snd_soc_dpcm_get_substream(be, stream); 1683 1684 if (!be_substream) { 1685 dev_err(be->dev, "ASoC: no backend %s stream\n", 1686 stream ? "capture" : "playback"); 1687 continue; 1688 } 1689 1690 /* is this op for this BE ? */ 1691 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1692 continue; 1693 1694 /* first time the dpcm is open ? */ 1695 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1696 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1697 stream ? "capture" : "playback", 1698 be->dpcm[stream].state); 1699 1700 if (be->dpcm[stream].users++ != 0) 1701 continue; 1702 1703 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1704 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1705 continue; 1706 1707 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1708 stream ? "capture" : "playback", be->dai_link->name); 1709 1710 be_substream->runtime = be->dpcm[stream].runtime; 1711 err = soc_pcm_open(be_substream); 1712 if (err < 0) { 1713 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1714 be->dpcm[stream].users--; 1715 if (be->dpcm[stream].users < 0) 1716 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1717 stream ? "capture" : "playback", 1718 be->dpcm[stream].state); 1719 1720 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1721 goto unwind; 1722 } 1723 1724 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1725 count++; 1726 } 1727 1728 return count; 1729 1730 unwind: 1731 /* disable any enabled and non active backends */ 1732 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1733 struct snd_soc_pcm_runtime *be = dpcm->be; 1734 struct snd_pcm_substream *be_substream = 1735 snd_soc_dpcm_get_substream(be, stream); 1736 1737 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1738 continue; 1739 1740 if (be->dpcm[stream].users == 0) 1741 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1742 stream ? "capture" : "playback", 1743 be->dpcm[stream].state); 1744 1745 if (--be->dpcm[stream].users != 0) 1746 continue; 1747 1748 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1749 continue; 1750 1751 soc_pcm_close(be_substream); 1752 be_substream->runtime = NULL; 1753 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1754 } 1755 1756 return err; 1757 } 1758 1759 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 1760 struct snd_soc_pcm_stream *stream, 1761 u64 formats) 1762 { 1763 runtime->hw.rate_min = stream->rate_min; 1764 runtime->hw.rate_max = stream->rate_max; 1765 runtime->hw.channels_min = stream->channels_min; 1766 runtime->hw.channels_max = stream->channels_max; 1767 if (runtime->hw.formats) 1768 runtime->hw.formats &= formats & stream->formats; 1769 else 1770 runtime->hw.formats = formats & stream->formats; 1771 runtime->hw.rates = stream->rates; 1772 } 1773 1774 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream) 1775 { 1776 struct snd_soc_pcm_runtime *fe = substream->private_data; 1777 struct snd_soc_dpcm *dpcm; 1778 u64 formats = ULLONG_MAX; 1779 int stream = substream->stream; 1780 1781 if (!fe->dai_link->dpcm_merged_format) 1782 return formats; 1783 1784 /* 1785 * It returns merged BE codec format 1786 * if FE want to use it (= dpcm_merged_format) 1787 */ 1788 1789 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1790 struct snd_soc_pcm_runtime *be = dpcm->be; 1791 struct snd_soc_dai_driver *codec_dai_drv; 1792 struct snd_soc_pcm_stream *codec_stream; 1793 int i; 1794 1795 for (i = 0; i < be->num_codecs; i++) { 1796 codec_dai_drv = be->codec_dais[i]->driver; 1797 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1798 codec_stream = &codec_dai_drv->playback; 1799 else 1800 codec_stream = &codec_dai_drv->capture; 1801 1802 formats &= codec_stream->formats; 1803 } 1804 } 1805 1806 return formats; 1807 } 1808 1809 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1810 { 1811 struct snd_pcm_runtime *runtime = substream->runtime; 1812 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1813 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1814 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 1815 u64 format = dpcm_runtime_base_format(substream); 1816 1817 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1818 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format); 1819 else 1820 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format); 1821 } 1822 1823 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 1824 1825 /* Set FE's runtime_update state; the state is protected via PCM stream lock 1826 * for avoiding the race with trigger callback. 1827 * If the state is unset and a trigger is pending while the previous operation, 1828 * process the pending trigger action here. 1829 */ 1830 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 1831 int stream, enum snd_soc_dpcm_update state) 1832 { 1833 struct snd_pcm_substream *substream = 1834 snd_soc_dpcm_get_substream(fe, stream); 1835 1836 snd_pcm_stream_lock_irq(substream); 1837 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 1838 dpcm_fe_dai_do_trigger(substream, 1839 fe->dpcm[stream].trigger_pending - 1); 1840 fe->dpcm[stream].trigger_pending = 0; 1841 } 1842 fe->dpcm[stream].runtime_update = state; 1843 snd_pcm_stream_unlock_irq(substream); 1844 } 1845 1846 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1847 int stream) 1848 { 1849 struct snd_soc_dpcm *dpcm; 1850 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1851 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai; 1852 int err; 1853 1854 /* apply symmetry for FE */ 1855 if (soc_pcm_has_symmetry(fe_substream)) 1856 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1857 1858 /* Symmetry only applies if we've got an active stream. */ 1859 if (fe_cpu_dai->active) { 1860 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1861 if (err < 0) 1862 return err; 1863 } 1864 1865 /* apply symmetry for BE */ 1866 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1867 struct snd_soc_pcm_runtime *be = dpcm->be; 1868 struct snd_pcm_substream *be_substream = 1869 snd_soc_dpcm_get_substream(be, stream); 1870 struct snd_soc_pcm_runtime *rtd = be_substream->private_data; 1871 int i; 1872 1873 if (rtd->dai_link->be_hw_params_fixup) 1874 continue; 1875 1876 if (soc_pcm_has_symmetry(be_substream)) 1877 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1878 1879 /* Symmetry only applies if we've got an active stream. */ 1880 if (rtd->cpu_dai->active) { 1881 err = soc_pcm_apply_symmetry(be_substream, rtd->cpu_dai); 1882 if (err < 0) 1883 return err; 1884 } 1885 1886 for (i = 0; i < rtd->num_codecs; i++) { 1887 if (rtd->codec_dais[i]->active) { 1888 err = soc_pcm_apply_symmetry(be_substream, 1889 rtd->codec_dais[i]); 1890 if (err < 0) 1891 return err; 1892 } 1893 } 1894 } 1895 1896 return 0; 1897 } 1898 1899 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1900 { 1901 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1902 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1903 int stream = fe_substream->stream, ret = 0; 1904 1905 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1906 1907 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1908 if (ret < 0) { 1909 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1910 goto be_err; 1911 } 1912 1913 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1914 1915 /* start the DAI frontend */ 1916 ret = soc_pcm_open(fe_substream); 1917 if (ret < 0) { 1918 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 1919 goto unwind; 1920 } 1921 1922 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1923 1924 dpcm_set_fe_runtime(fe_substream); 1925 snd_pcm_limit_hw_rates(runtime); 1926 1927 ret = dpcm_apply_symmetry(fe_substream, stream); 1928 if (ret < 0) { 1929 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n", 1930 ret); 1931 goto unwind; 1932 } 1933 1934 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1935 return 0; 1936 1937 unwind: 1938 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1939 be_err: 1940 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1941 return ret; 1942 } 1943 1944 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1945 { 1946 struct snd_soc_dpcm *dpcm; 1947 1948 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 1949 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1950 1951 struct snd_soc_pcm_runtime *be = dpcm->be; 1952 struct snd_pcm_substream *be_substream = 1953 snd_soc_dpcm_get_substream(be, stream); 1954 1955 /* is this op for this BE ? */ 1956 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1957 continue; 1958 1959 if (be->dpcm[stream].users == 0) 1960 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1961 stream ? "capture" : "playback", 1962 be->dpcm[stream].state); 1963 1964 if (--be->dpcm[stream].users != 0) 1965 continue; 1966 1967 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1968 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) 1969 continue; 1970 1971 dev_dbg(be->dev, "ASoC: close BE %s\n", 1972 be->dai_link->name); 1973 1974 soc_pcm_close(be_substream); 1975 be_substream->runtime = NULL; 1976 1977 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1978 } 1979 return 0; 1980 } 1981 1982 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1983 { 1984 struct snd_soc_pcm_runtime *fe = substream->private_data; 1985 int stream = substream->stream; 1986 1987 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1988 1989 /* shutdown the BEs */ 1990 dpcm_be_dai_shutdown(fe, substream->stream); 1991 1992 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1993 1994 /* now shutdown the frontend */ 1995 soc_pcm_close(substream); 1996 1997 /* run the stream event for each BE */ 1998 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1999 2000 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2001 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2002 return 0; 2003 } 2004 2005 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 2006 { 2007 struct snd_soc_dpcm *dpcm; 2008 2009 /* only hw_params backends that are either sinks or sources 2010 * to this frontend DAI */ 2011 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2012 2013 struct snd_soc_pcm_runtime *be = dpcm->be; 2014 struct snd_pcm_substream *be_substream = 2015 snd_soc_dpcm_get_substream(be, stream); 2016 2017 /* is this op for this BE ? */ 2018 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2019 continue; 2020 2021 /* only free hw when no longer used - check all FEs */ 2022 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2023 continue; 2024 2025 /* do not free hw if this BE is used by other FE */ 2026 if (be->dpcm[stream].users > 1) 2027 continue; 2028 2029 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2030 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2031 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2032 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2033 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2034 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2035 continue; 2036 2037 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2038 be->dai_link->name); 2039 2040 soc_pcm_hw_free(be_substream); 2041 2042 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2043 } 2044 2045 return 0; 2046 } 2047 2048 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2049 { 2050 struct snd_soc_pcm_runtime *fe = substream->private_data; 2051 int err, stream = substream->stream; 2052 2053 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2054 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2055 2056 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2057 2058 /* call hw_free on the frontend */ 2059 err = soc_pcm_hw_free(substream); 2060 if (err < 0) 2061 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 2062 fe->dai_link->name); 2063 2064 /* only hw_params backends that are either sinks or sources 2065 * to this frontend DAI */ 2066 err = dpcm_be_dai_hw_free(fe, stream); 2067 2068 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2069 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2070 2071 mutex_unlock(&fe->card->mutex); 2072 return 0; 2073 } 2074 2075 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2076 { 2077 struct snd_soc_dpcm *dpcm; 2078 int ret; 2079 2080 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2081 2082 struct snd_soc_pcm_runtime *be = dpcm->be; 2083 struct snd_pcm_substream *be_substream = 2084 snd_soc_dpcm_get_substream(be, stream); 2085 2086 /* is this op for this BE ? */ 2087 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2088 continue; 2089 2090 /* copy params for each dpcm */ 2091 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 2092 sizeof(struct snd_pcm_hw_params)); 2093 2094 /* perform any hw_params fixups */ 2095 if (be->dai_link->be_hw_params_fixup) { 2096 ret = be->dai_link->be_hw_params_fixup(be, 2097 &dpcm->hw_params); 2098 if (ret < 0) { 2099 dev_err(be->dev, 2100 "ASoC: hw_params BE fixup failed %d\n", 2101 ret); 2102 goto unwind; 2103 } 2104 } 2105 2106 /* only allow hw_params() if no connected FEs are running */ 2107 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2108 continue; 2109 2110 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2111 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2112 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2113 continue; 2114 2115 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2116 be->dai_link->name); 2117 2118 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 2119 if (ret < 0) { 2120 dev_err(dpcm->be->dev, 2121 "ASoC: hw_params BE failed %d\n", ret); 2122 goto unwind; 2123 } 2124 2125 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2126 } 2127 return 0; 2128 2129 unwind: 2130 /* disable any enabled and non active backends */ 2131 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2132 struct snd_soc_pcm_runtime *be = dpcm->be; 2133 struct snd_pcm_substream *be_substream = 2134 snd_soc_dpcm_get_substream(be, stream); 2135 2136 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2137 continue; 2138 2139 /* only allow hw_free() if no connected FEs are running */ 2140 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2141 continue; 2142 2143 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2144 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2145 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2146 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2147 continue; 2148 2149 soc_pcm_hw_free(be_substream); 2150 } 2151 2152 return ret; 2153 } 2154 2155 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2156 struct snd_pcm_hw_params *params) 2157 { 2158 struct snd_soc_pcm_runtime *fe = substream->private_data; 2159 int ret, stream = substream->stream; 2160 2161 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2162 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2163 2164 memcpy(&fe->dpcm[substream->stream].hw_params, params, 2165 sizeof(struct snd_pcm_hw_params)); 2166 ret = dpcm_be_dai_hw_params(fe, substream->stream); 2167 if (ret < 0) { 2168 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 2169 goto out; 2170 } 2171 2172 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2173 fe->dai_link->name, params_rate(params), 2174 params_channels(params), params_format(params)); 2175 2176 /* call hw_params on the frontend */ 2177 ret = soc_pcm_hw_params(substream, params); 2178 if (ret < 0) { 2179 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 2180 dpcm_be_dai_hw_free(fe, stream); 2181 } else 2182 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2183 2184 out: 2185 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2186 mutex_unlock(&fe->card->mutex); 2187 return ret; 2188 } 2189 2190 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 2191 struct snd_pcm_substream *substream, int cmd) 2192 { 2193 int ret; 2194 2195 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 2196 dpcm->be->dai_link->name, cmd); 2197 2198 ret = soc_pcm_trigger(substream, cmd); 2199 if (ret < 0) 2200 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 2201 2202 return ret; 2203 } 2204 2205 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2206 int cmd) 2207 { 2208 struct snd_soc_dpcm *dpcm; 2209 int ret = 0; 2210 2211 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2212 2213 struct snd_soc_pcm_runtime *be = dpcm->be; 2214 struct snd_pcm_substream *be_substream = 2215 snd_soc_dpcm_get_substream(be, stream); 2216 2217 /* is this op for this BE ? */ 2218 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2219 continue; 2220 2221 switch (cmd) { 2222 case SNDRV_PCM_TRIGGER_START: 2223 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2224 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2225 continue; 2226 2227 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2228 if (ret) 2229 return ret; 2230 2231 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2232 break; 2233 case SNDRV_PCM_TRIGGER_RESUME: 2234 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2235 continue; 2236 2237 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2238 if (ret) 2239 return ret; 2240 2241 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2242 break; 2243 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2244 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2245 continue; 2246 2247 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2248 if (ret) 2249 return ret; 2250 2251 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2252 break; 2253 case SNDRV_PCM_TRIGGER_STOP: 2254 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2255 continue; 2256 2257 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2258 continue; 2259 2260 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2261 if (ret) 2262 return ret; 2263 2264 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2265 break; 2266 case SNDRV_PCM_TRIGGER_SUSPEND: 2267 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2268 continue; 2269 2270 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2271 continue; 2272 2273 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2274 if (ret) 2275 return ret; 2276 2277 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2278 break; 2279 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2280 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2281 continue; 2282 2283 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2284 continue; 2285 2286 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2287 if (ret) 2288 return ret; 2289 2290 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2291 break; 2292 } 2293 } 2294 2295 return ret; 2296 } 2297 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2298 2299 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2300 { 2301 struct snd_soc_pcm_runtime *fe = substream->private_data; 2302 int stream = substream->stream, ret; 2303 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2304 2305 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2306 2307 switch (trigger) { 2308 case SND_SOC_DPCM_TRIGGER_PRE: 2309 /* call trigger on the frontend before the backend. */ 2310 2311 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2312 fe->dai_link->name, cmd); 2313 2314 ret = soc_pcm_trigger(substream, cmd); 2315 if (ret < 0) { 2316 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2317 goto out; 2318 } 2319 2320 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2321 break; 2322 case SND_SOC_DPCM_TRIGGER_POST: 2323 /* call trigger on the frontend after the backend. */ 2324 2325 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2326 if (ret < 0) { 2327 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2328 goto out; 2329 } 2330 2331 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2332 fe->dai_link->name, cmd); 2333 2334 ret = soc_pcm_trigger(substream, cmd); 2335 break; 2336 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2337 /* bespoke trigger() - handles both FE and BEs */ 2338 2339 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2340 fe->dai_link->name, cmd); 2341 2342 ret = soc_pcm_bespoke_trigger(substream, cmd); 2343 if (ret < 0) { 2344 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2345 goto out; 2346 } 2347 break; 2348 default: 2349 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2350 fe->dai_link->name); 2351 ret = -EINVAL; 2352 goto out; 2353 } 2354 2355 switch (cmd) { 2356 case SNDRV_PCM_TRIGGER_START: 2357 case SNDRV_PCM_TRIGGER_RESUME: 2358 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2359 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2360 break; 2361 case SNDRV_PCM_TRIGGER_STOP: 2362 case SNDRV_PCM_TRIGGER_SUSPEND: 2363 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2364 break; 2365 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2366 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2367 break; 2368 } 2369 2370 out: 2371 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2372 return ret; 2373 } 2374 2375 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2376 { 2377 struct snd_soc_pcm_runtime *fe = substream->private_data; 2378 int stream = substream->stream; 2379 2380 /* if FE's runtime_update is already set, we're in race; 2381 * process this trigger later at exit 2382 */ 2383 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2384 fe->dpcm[stream].trigger_pending = cmd + 1; 2385 return 0; /* delayed, assuming it's successful */ 2386 } 2387 2388 /* we're alone, let's trigger */ 2389 return dpcm_fe_dai_do_trigger(substream, cmd); 2390 } 2391 2392 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2393 { 2394 struct snd_soc_dpcm *dpcm; 2395 int ret = 0; 2396 2397 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2398 2399 struct snd_soc_pcm_runtime *be = dpcm->be; 2400 struct snd_pcm_substream *be_substream = 2401 snd_soc_dpcm_get_substream(be, stream); 2402 2403 /* is this op for this BE ? */ 2404 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2405 continue; 2406 2407 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2408 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2409 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2410 continue; 2411 2412 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2413 be->dai_link->name); 2414 2415 ret = soc_pcm_prepare(be_substream); 2416 if (ret < 0) { 2417 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2418 ret); 2419 break; 2420 } 2421 2422 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2423 } 2424 return ret; 2425 } 2426 2427 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2428 { 2429 struct snd_soc_pcm_runtime *fe = substream->private_data; 2430 int stream = substream->stream, ret = 0; 2431 2432 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2433 2434 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2435 2436 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2437 2438 /* there is no point preparing this FE if there are no BEs */ 2439 if (list_empty(&fe->dpcm[stream].be_clients)) { 2440 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2441 fe->dai_link->name); 2442 ret = -EINVAL; 2443 goto out; 2444 } 2445 2446 ret = dpcm_be_dai_prepare(fe, substream->stream); 2447 if (ret < 0) 2448 goto out; 2449 2450 /* call prepare on the frontend */ 2451 ret = soc_pcm_prepare(substream); 2452 if (ret < 0) { 2453 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2454 fe->dai_link->name); 2455 goto out; 2456 } 2457 2458 /* run the stream event for each BE */ 2459 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2460 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2461 2462 out: 2463 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2464 mutex_unlock(&fe->card->mutex); 2465 2466 return ret; 2467 } 2468 2469 static int soc_pcm_ioctl(struct snd_pcm_substream *substream, 2470 unsigned int cmd, void *arg) 2471 { 2472 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2473 struct snd_soc_platform *platform = rtd->platform; 2474 struct snd_soc_component *component; 2475 struct snd_soc_rtdcom_list *rtdcom; 2476 2477 if (platform && platform->driver->ops && platform->driver->ops->ioctl) 2478 return platform->driver->ops->ioctl(substream, cmd, arg); 2479 2480 for_each_rtdcom(rtd, rtdcom) { 2481 component = rtdcom->component; 2482 2483 /* ignore duplication for now */ 2484 if (platform && (component == &platform->component)) 2485 continue; 2486 2487 if (!component->driver->ops || 2488 !component->driver->ops->ioctl) 2489 continue; 2490 2491 /* FIXME: use 1st ioctl */ 2492 return component->driver->ops->ioctl(substream, cmd, arg); 2493 } 2494 2495 return snd_pcm_lib_ioctl(substream, cmd, arg); 2496 } 2497 2498 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2499 { 2500 struct snd_pcm_substream *substream = 2501 snd_soc_dpcm_get_substream(fe, stream); 2502 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2503 int err; 2504 2505 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2506 stream ? "capture" : "playback", fe->dai_link->name); 2507 2508 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2509 /* call bespoke trigger - FE takes care of all BE triggers */ 2510 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2511 fe->dai_link->name); 2512 2513 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2514 if (err < 0) 2515 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2516 } else { 2517 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2518 fe->dai_link->name); 2519 2520 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2521 if (err < 0) 2522 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2523 } 2524 2525 err = dpcm_be_dai_hw_free(fe, stream); 2526 if (err < 0) 2527 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2528 2529 err = dpcm_be_dai_shutdown(fe, stream); 2530 if (err < 0) 2531 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2532 2533 /* run the stream event for each BE */ 2534 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2535 2536 return 0; 2537 } 2538 2539 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2540 { 2541 struct snd_pcm_substream *substream = 2542 snd_soc_dpcm_get_substream(fe, stream); 2543 struct snd_soc_dpcm *dpcm; 2544 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2545 int ret; 2546 2547 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2548 stream ? "capture" : "playback", fe->dai_link->name); 2549 2550 /* Only start the BE if the FE is ready */ 2551 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2552 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2553 return -EINVAL; 2554 2555 /* startup must always be called for new BEs */ 2556 ret = dpcm_be_dai_startup(fe, stream); 2557 if (ret < 0) 2558 goto disconnect; 2559 2560 /* keep going if FE state is > open */ 2561 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2562 return 0; 2563 2564 ret = dpcm_be_dai_hw_params(fe, stream); 2565 if (ret < 0) 2566 goto close; 2567 2568 /* keep going if FE state is > hw_params */ 2569 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2570 return 0; 2571 2572 2573 ret = dpcm_be_dai_prepare(fe, stream); 2574 if (ret < 0) 2575 goto hw_free; 2576 2577 /* run the stream event for each BE */ 2578 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2579 2580 /* keep going if FE state is > prepare */ 2581 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2582 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2583 return 0; 2584 2585 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2586 /* call trigger on the frontend - FE takes care of all BE triggers */ 2587 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2588 fe->dai_link->name); 2589 2590 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2591 if (ret < 0) { 2592 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2593 goto hw_free; 2594 } 2595 } else { 2596 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2597 fe->dai_link->name); 2598 2599 ret = dpcm_be_dai_trigger(fe, stream, 2600 SNDRV_PCM_TRIGGER_START); 2601 if (ret < 0) { 2602 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2603 goto hw_free; 2604 } 2605 } 2606 2607 return 0; 2608 2609 hw_free: 2610 dpcm_be_dai_hw_free(fe, stream); 2611 close: 2612 dpcm_be_dai_shutdown(fe, stream); 2613 disconnect: 2614 /* disconnect any non started BEs */ 2615 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2616 struct snd_soc_pcm_runtime *be = dpcm->be; 2617 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2618 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2619 } 2620 2621 return ret; 2622 } 2623 2624 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2625 { 2626 int ret; 2627 2628 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2629 ret = dpcm_run_update_startup(fe, stream); 2630 if (ret < 0) 2631 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2632 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2633 2634 return ret; 2635 } 2636 2637 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2638 { 2639 int ret; 2640 2641 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2642 ret = dpcm_run_update_shutdown(fe, stream); 2643 if (ret < 0) 2644 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2645 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2646 2647 return ret; 2648 } 2649 2650 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2651 * any DAI links. 2652 */ 2653 int soc_dpcm_runtime_update(struct snd_soc_card *card) 2654 { 2655 struct snd_soc_pcm_runtime *fe; 2656 int old, new, paths; 2657 2658 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2659 list_for_each_entry(fe, &card->rtd_list, list) { 2660 struct snd_soc_dapm_widget_list *list; 2661 2662 /* make sure link is FE */ 2663 if (!fe->dai_link->dynamic) 2664 continue; 2665 2666 /* only check active links */ 2667 if (!fe->cpu_dai->active) 2668 continue; 2669 2670 /* DAPM sync will call this to update DSP paths */ 2671 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n", 2672 fe->dai_link->name); 2673 2674 /* skip if FE doesn't have playback capability */ 2675 if (!fe->cpu_dai->driver->playback.channels_min 2676 || !fe->codec_dai->driver->playback.channels_min) 2677 goto capture; 2678 2679 /* skip if FE isn't currently playing */ 2680 if (!fe->cpu_dai->playback_active 2681 || !fe->codec_dai->playback_active) 2682 goto capture; 2683 2684 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2685 if (paths < 0) { 2686 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2687 fe->dai_link->name, "playback"); 2688 mutex_unlock(&card->mutex); 2689 return paths; 2690 } 2691 2692 /* update any new playback paths */ 2693 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1); 2694 if (new) { 2695 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2696 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2697 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2698 } 2699 2700 /* update any old playback paths */ 2701 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0); 2702 if (old) { 2703 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2704 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2705 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2706 } 2707 2708 dpcm_path_put(&list); 2709 capture: 2710 /* skip if FE doesn't have capture capability */ 2711 if (!fe->cpu_dai->driver->capture.channels_min 2712 || !fe->codec_dai->driver->capture.channels_min) 2713 continue; 2714 2715 /* skip if FE isn't currently capturing */ 2716 if (!fe->cpu_dai->capture_active 2717 || !fe->codec_dai->capture_active) 2718 continue; 2719 2720 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2721 if (paths < 0) { 2722 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2723 fe->dai_link->name, "capture"); 2724 mutex_unlock(&card->mutex); 2725 return paths; 2726 } 2727 2728 /* update any new capture paths */ 2729 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1); 2730 if (new) { 2731 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2732 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2733 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2734 } 2735 2736 /* update any old capture paths */ 2737 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0); 2738 if (old) { 2739 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2740 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2741 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2742 } 2743 2744 dpcm_path_put(&list); 2745 } 2746 2747 mutex_unlock(&card->mutex); 2748 return 0; 2749 } 2750 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2751 { 2752 struct snd_soc_dpcm *dpcm; 2753 struct list_head *clients = 2754 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients; 2755 2756 list_for_each_entry(dpcm, clients, list_be) { 2757 2758 struct snd_soc_pcm_runtime *be = dpcm->be; 2759 int i; 2760 2761 if (be->dai_link->ignore_suspend) 2762 continue; 2763 2764 for (i = 0; i < be->num_codecs; i++) { 2765 struct snd_soc_dai *dai = be->codec_dais[i]; 2766 struct snd_soc_dai_driver *drv = dai->driver; 2767 2768 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2769 be->dai_link->name); 2770 2771 if (drv->ops && drv->ops->digital_mute && 2772 dai->playback_active) 2773 drv->ops->digital_mute(dai, mute); 2774 } 2775 } 2776 2777 return 0; 2778 } 2779 2780 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2781 { 2782 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2783 struct snd_soc_dpcm *dpcm; 2784 struct snd_soc_dapm_widget_list *list; 2785 int ret; 2786 int stream = fe_substream->stream; 2787 2788 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2789 fe->dpcm[stream].runtime = fe_substream->runtime; 2790 2791 ret = dpcm_path_get(fe, stream, &list); 2792 if (ret < 0) { 2793 mutex_unlock(&fe->card->mutex); 2794 return ret; 2795 } else if (ret == 0) { 2796 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2797 fe->dai_link->name, stream ? "capture" : "playback"); 2798 } 2799 2800 /* calculate valid and active FE <-> BE dpcms */ 2801 dpcm_process_paths(fe, stream, &list, 1); 2802 2803 ret = dpcm_fe_dai_startup(fe_substream); 2804 if (ret < 0) { 2805 /* clean up all links */ 2806 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2807 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2808 2809 dpcm_be_disconnect(fe, stream); 2810 fe->dpcm[stream].runtime = NULL; 2811 } 2812 2813 dpcm_clear_pending_state(fe, stream); 2814 dpcm_path_put(&list); 2815 mutex_unlock(&fe->card->mutex); 2816 return ret; 2817 } 2818 2819 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2820 { 2821 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2822 struct snd_soc_dpcm *dpcm; 2823 int stream = fe_substream->stream, ret; 2824 2825 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2826 ret = dpcm_fe_dai_shutdown(fe_substream); 2827 2828 /* mark FE's links ready to prune */ 2829 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2830 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2831 2832 dpcm_be_disconnect(fe, stream); 2833 2834 fe->dpcm[stream].runtime = NULL; 2835 mutex_unlock(&fe->card->mutex); 2836 return ret; 2837 } 2838 2839 static void soc_pcm_private_free(struct snd_pcm *pcm) 2840 { 2841 struct snd_soc_pcm_runtime *rtd = pcm->private_data; 2842 struct snd_soc_rtdcom_list *rtdcom; 2843 struct snd_soc_component *component; 2844 2845 /* need to sync the delayed work before releasing resources */ 2846 flush_delayed_work(&rtd->delayed_work); 2847 for_each_rtdcom(rtd, rtdcom) { 2848 component = rtdcom->component; 2849 2850 if (component->pcm_free) 2851 component->pcm_free(component, pcm); 2852 } 2853 } 2854 2855 static int soc_rtdcom_ack(struct snd_pcm_substream *substream) 2856 { 2857 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2858 struct snd_soc_rtdcom_list *rtdcom; 2859 struct snd_soc_component *component; 2860 2861 for_each_rtdcom(rtd, rtdcom) { 2862 component = rtdcom->component; 2863 2864 if (!component->driver->ops || 2865 !component->driver->ops->ack) 2866 continue; 2867 2868 /* FIXME. it returns 1st ask now */ 2869 return component->driver->ops->ack(substream); 2870 } 2871 2872 return -EINVAL; 2873 } 2874 2875 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel, 2876 unsigned long pos, void __user *buf, 2877 unsigned long bytes) 2878 { 2879 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2880 struct snd_soc_rtdcom_list *rtdcom; 2881 struct snd_soc_component *component; 2882 2883 for_each_rtdcom(rtd, rtdcom) { 2884 component = rtdcom->component; 2885 2886 if (!component->driver->ops || 2887 !component->driver->ops->copy_user) 2888 continue; 2889 2890 /* FIXME. it returns 1st copy now */ 2891 return component->driver->ops->copy_user(substream, channel, 2892 pos, buf, bytes); 2893 } 2894 2895 return -EINVAL; 2896 } 2897 2898 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel, 2899 unsigned long pos, void *buf, unsigned long bytes) 2900 { 2901 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2902 struct snd_soc_rtdcom_list *rtdcom; 2903 struct snd_soc_component *component; 2904 2905 for_each_rtdcom(rtd, rtdcom) { 2906 component = rtdcom->component; 2907 2908 if (!component->driver->ops || 2909 !component->driver->ops->copy_kernel) 2910 continue; 2911 2912 /* FIXME. it returns 1st copy now */ 2913 return component->driver->ops->copy_kernel(substream, channel, 2914 pos, buf, bytes); 2915 } 2916 2917 return -EINVAL; 2918 } 2919 2920 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel, 2921 unsigned long pos, unsigned long bytes) 2922 { 2923 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2924 struct snd_soc_rtdcom_list *rtdcom; 2925 struct snd_soc_component *component; 2926 2927 for_each_rtdcom(rtd, rtdcom) { 2928 component = rtdcom->component; 2929 2930 if (!component->driver->ops || 2931 !component->driver->ops->fill_silence) 2932 continue; 2933 2934 /* FIXME. it returns 1st silence now */ 2935 return component->driver->ops->fill_silence(substream, channel, 2936 pos, bytes); 2937 } 2938 2939 return -EINVAL; 2940 } 2941 2942 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream, 2943 unsigned long offset) 2944 { 2945 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2946 struct snd_soc_rtdcom_list *rtdcom; 2947 struct snd_soc_component *component; 2948 struct page *page; 2949 2950 for_each_rtdcom(rtd, rtdcom) { 2951 component = rtdcom->component; 2952 2953 if (!component->driver->ops || 2954 !component->driver->ops->page) 2955 continue; 2956 2957 /* FIXME. it returns 1st page now */ 2958 page = component->driver->ops->page(substream, offset); 2959 if (page) 2960 return page; 2961 } 2962 2963 return NULL; 2964 } 2965 2966 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream, 2967 struct vm_area_struct *vma) 2968 { 2969 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2970 struct snd_soc_rtdcom_list *rtdcom; 2971 struct snd_soc_component *component; 2972 2973 for_each_rtdcom(rtd, rtdcom) { 2974 component = rtdcom->component; 2975 2976 if (!component->driver->ops || 2977 !component->driver->ops->mmap) 2978 continue; 2979 2980 /* FIXME. it returns 1st mmap now */ 2981 return component->driver->ops->mmap(substream, vma); 2982 } 2983 2984 return -EINVAL; 2985 } 2986 2987 /* create a new pcm */ 2988 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2989 { 2990 struct snd_soc_platform *platform = rtd->platform; 2991 struct snd_soc_dai *codec_dai; 2992 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2993 struct snd_soc_component *component; 2994 struct snd_soc_rtdcom_list *rtdcom; 2995 struct snd_pcm *pcm; 2996 char new_name[64]; 2997 int ret = 0, playback = 0, capture = 0; 2998 int i; 2999 3000 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 3001 playback = rtd->dai_link->dpcm_playback; 3002 capture = rtd->dai_link->dpcm_capture; 3003 } else { 3004 for (i = 0; i < rtd->num_codecs; i++) { 3005 codec_dai = rtd->codec_dais[i]; 3006 if (codec_dai->driver->playback.channels_min) 3007 playback = 1; 3008 if (codec_dai->driver->capture.channels_min) 3009 capture = 1; 3010 } 3011 3012 capture = capture && cpu_dai->driver->capture.channels_min; 3013 playback = playback && cpu_dai->driver->playback.channels_min; 3014 } 3015 3016 if (rtd->dai_link->playback_only) { 3017 playback = 1; 3018 capture = 0; 3019 } 3020 3021 if (rtd->dai_link->capture_only) { 3022 playback = 0; 3023 capture = 1; 3024 } 3025 3026 /* create the PCM */ 3027 if (rtd->dai_link->no_pcm) { 3028 snprintf(new_name, sizeof(new_name), "(%s)", 3029 rtd->dai_link->stream_name); 3030 3031 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 3032 playback, capture, &pcm); 3033 } else { 3034 if (rtd->dai_link->dynamic) 3035 snprintf(new_name, sizeof(new_name), "%s (*)", 3036 rtd->dai_link->stream_name); 3037 else 3038 snprintf(new_name, sizeof(new_name), "%s %s-%d", 3039 rtd->dai_link->stream_name, 3040 (rtd->num_codecs > 1) ? 3041 "multicodec" : rtd->codec_dai->name, num); 3042 3043 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 3044 capture, &pcm); 3045 } 3046 if (ret < 0) { 3047 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 3048 rtd->dai_link->name); 3049 return ret; 3050 } 3051 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 3052 3053 /* DAPM dai link stream work */ 3054 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 3055 3056 pcm->nonatomic = rtd->dai_link->nonatomic; 3057 rtd->pcm = pcm; 3058 pcm->private_data = rtd; 3059 3060 if (rtd->dai_link->no_pcm) { 3061 if (playback) 3062 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 3063 if (capture) 3064 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 3065 goto out; 3066 } 3067 3068 /* ASoC PCM operations */ 3069 if (rtd->dai_link->dynamic) { 3070 rtd->ops.open = dpcm_fe_dai_open; 3071 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 3072 rtd->ops.prepare = dpcm_fe_dai_prepare; 3073 rtd->ops.trigger = dpcm_fe_dai_trigger; 3074 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 3075 rtd->ops.close = dpcm_fe_dai_close; 3076 rtd->ops.pointer = soc_pcm_pointer; 3077 rtd->ops.ioctl = soc_pcm_ioctl; 3078 } else { 3079 rtd->ops.open = soc_pcm_open; 3080 rtd->ops.hw_params = soc_pcm_hw_params; 3081 rtd->ops.prepare = soc_pcm_prepare; 3082 rtd->ops.trigger = soc_pcm_trigger; 3083 rtd->ops.hw_free = soc_pcm_hw_free; 3084 rtd->ops.close = soc_pcm_close; 3085 rtd->ops.pointer = soc_pcm_pointer; 3086 rtd->ops.ioctl = soc_pcm_ioctl; 3087 } 3088 3089 for_each_rtdcom(rtd, rtdcom) { 3090 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops; 3091 3092 if (!ops) 3093 continue; 3094 3095 if (ops->ack) 3096 rtd->ops.ack = soc_rtdcom_ack; 3097 if (ops->copy_user) 3098 rtd->ops.copy_user = soc_rtdcom_copy_user; 3099 if (ops->copy_kernel) 3100 rtd->ops.copy_kernel = soc_rtdcom_copy_kernel; 3101 if (ops->fill_silence) 3102 rtd->ops.fill_silence = soc_rtdcom_fill_silence; 3103 if (ops->page) 3104 rtd->ops.page = soc_rtdcom_page; 3105 if (ops->mmap) 3106 rtd->ops.mmap = soc_rtdcom_mmap; 3107 } 3108 3109 /* overwrite */ 3110 if (platform && platform->driver->ops) { 3111 rtd->ops.ack = platform->driver->ops->ack; 3112 rtd->ops.copy_user = platform->driver->ops->copy_user; 3113 rtd->ops.copy_kernel = platform->driver->ops->copy_kernel; 3114 rtd->ops.fill_silence = platform->driver->ops->fill_silence; 3115 rtd->ops.page = platform->driver->ops->page; 3116 rtd->ops.mmap = platform->driver->ops->mmap; 3117 } 3118 3119 if (playback) 3120 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 3121 3122 if (capture) 3123 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 3124 3125 for_each_rtdcom(rtd, rtdcom) { 3126 component = rtdcom->component; 3127 3128 if (!component->pcm_new) 3129 continue; 3130 3131 ret = component->pcm_new(component, rtd); 3132 if (ret < 0) { 3133 dev_err(component->dev, 3134 "ASoC: pcm constructor failed: %d\n", 3135 ret); 3136 return ret; 3137 } 3138 } 3139 3140 pcm->private_free = soc_pcm_private_free; 3141 out: 3142 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 3143 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 3144 cpu_dai->name); 3145 return ret; 3146 } 3147 3148 /* is the current PCM operation for this FE ? */ 3149 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 3150 { 3151 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 3152 return 1; 3153 return 0; 3154 } 3155 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 3156 3157 /* is the current PCM operation for this BE ? */ 3158 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 3159 struct snd_soc_pcm_runtime *be, int stream) 3160 { 3161 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 3162 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 3163 be->dpcm[stream].runtime_update)) 3164 return 1; 3165 return 0; 3166 } 3167 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 3168 3169 /* get the substream for this BE */ 3170 struct snd_pcm_substream * 3171 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3172 { 3173 return be->pcm->streams[stream].substream; 3174 } 3175 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3176 3177 /* get the BE runtime state */ 3178 enum snd_soc_dpcm_state 3179 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 3180 { 3181 return be->dpcm[stream].state; 3182 } 3183 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 3184 3185 /* set the BE runtime state */ 3186 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 3187 int stream, enum snd_soc_dpcm_state state) 3188 { 3189 be->dpcm[stream].state = state; 3190 } 3191 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 3192 3193 /* 3194 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3195 * are not running, paused or suspended for the specified stream direction. 3196 */ 3197 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3198 struct snd_soc_pcm_runtime *be, int stream) 3199 { 3200 struct snd_soc_dpcm *dpcm; 3201 int state; 3202 3203 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 3204 3205 if (dpcm->fe == fe) 3206 continue; 3207 3208 state = dpcm->fe->dpcm[stream].state; 3209 if (state == SND_SOC_DPCM_STATE_START || 3210 state == SND_SOC_DPCM_STATE_PAUSED || 3211 state == SND_SOC_DPCM_STATE_SUSPEND) 3212 return 0; 3213 } 3214 3215 /* it's safe to free/stop this BE DAI */ 3216 return 1; 3217 } 3218 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3219 3220 /* 3221 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3222 * running, paused or suspended for the specified stream direction. 3223 */ 3224 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3225 struct snd_soc_pcm_runtime *be, int stream) 3226 { 3227 struct snd_soc_dpcm *dpcm; 3228 int state; 3229 3230 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 3231 3232 if (dpcm->fe == fe) 3233 continue; 3234 3235 state = dpcm->fe->dpcm[stream].state; 3236 if (state == SND_SOC_DPCM_STATE_START || 3237 state == SND_SOC_DPCM_STATE_PAUSED || 3238 state == SND_SOC_DPCM_STATE_SUSPEND || 3239 state == SND_SOC_DPCM_STATE_PREPARE) 3240 return 0; 3241 } 3242 3243 /* it's safe to change hw_params */ 3244 return 1; 3245 } 3246 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3247 3248 #ifdef CONFIG_DEBUG_FS 3249 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 3250 { 3251 switch (state) { 3252 case SND_SOC_DPCM_STATE_NEW: 3253 return "new"; 3254 case SND_SOC_DPCM_STATE_OPEN: 3255 return "open"; 3256 case SND_SOC_DPCM_STATE_HW_PARAMS: 3257 return "hw_params"; 3258 case SND_SOC_DPCM_STATE_PREPARE: 3259 return "prepare"; 3260 case SND_SOC_DPCM_STATE_START: 3261 return "start"; 3262 case SND_SOC_DPCM_STATE_STOP: 3263 return "stop"; 3264 case SND_SOC_DPCM_STATE_SUSPEND: 3265 return "suspend"; 3266 case SND_SOC_DPCM_STATE_PAUSED: 3267 return "paused"; 3268 case SND_SOC_DPCM_STATE_HW_FREE: 3269 return "hw_free"; 3270 case SND_SOC_DPCM_STATE_CLOSE: 3271 return "close"; 3272 } 3273 3274 return "unknown"; 3275 } 3276 3277 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 3278 int stream, char *buf, size_t size) 3279 { 3280 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 3281 struct snd_soc_dpcm *dpcm; 3282 ssize_t offset = 0; 3283 3284 /* FE state */ 3285 offset += snprintf(buf + offset, size - offset, 3286 "[%s - %s]\n", fe->dai_link->name, 3287 stream ? "Capture" : "Playback"); 3288 3289 offset += snprintf(buf + offset, size - offset, "State: %s\n", 3290 dpcm_state_string(fe->dpcm[stream].state)); 3291 3292 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3293 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3294 offset += snprintf(buf + offset, size - offset, 3295 "Hardware Params: " 3296 "Format = %s, Channels = %d, Rate = %d\n", 3297 snd_pcm_format_name(params_format(params)), 3298 params_channels(params), 3299 params_rate(params)); 3300 3301 /* BEs state */ 3302 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 3303 3304 if (list_empty(&fe->dpcm[stream].be_clients)) { 3305 offset += snprintf(buf + offset, size - offset, 3306 " No active DSP links\n"); 3307 goto out; 3308 } 3309 3310 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 3311 struct snd_soc_pcm_runtime *be = dpcm->be; 3312 params = &dpcm->hw_params; 3313 3314 offset += snprintf(buf + offset, size - offset, 3315 "- %s\n", be->dai_link->name); 3316 3317 offset += snprintf(buf + offset, size - offset, 3318 " State: %s\n", 3319 dpcm_state_string(be->dpcm[stream].state)); 3320 3321 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 3322 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 3323 offset += snprintf(buf + offset, size - offset, 3324 " Hardware Params: " 3325 "Format = %s, Channels = %d, Rate = %d\n", 3326 snd_pcm_format_name(params_format(params)), 3327 params_channels(params), 3328 params_rate(params)); 3329 } 3330 3331 out: 3332 return offset; 3333 } 3334 3335 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 3336 size_t count, loff_t *ppos) 3337 { 3338 struct snd_soc_pcm_runtime *fe = file->private_data; 3339 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 3340 char *buf; 3341 3342 buf = kmalloc(out_count, GFP_KERNEL); 3343 if (!buf) 3344 return -ENOMEM; 3345 3346 if (fe->cpu_dai->driver->playback.channels_min) 3347 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 3348 buf + offset, out_count - offset); 3349 3350 if (fe->cpu_dai->driver->capture.channels_min) 3351 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 3352 buf + offset, out_count - offset); 3353 3354 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 3355 3356 kfree(buf); 3357 return ret; 3358 } 3359 3360 static const struct file_operations dpcm_state_fops = { 3361 .open = simple_open, 3362 .read = dpcm_state_read_file, 3363 .llseek = default_llseek, 3364 }; 3365 3366 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 3367 { 3368 if (!rtd->dai_link) 3369 return; 3370 3371 if (!rtd->card->debugfs_card_root) 3372 return; 3373 3374 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 3375 rtd->card->debugfs_card_root); 3376 if (!rtd->debugfs_dpcm_root) { 3377 dev_dbg(rtd->dev, 3378 "ASoC: Failed to create dpcm debugfs directory %s\n", 3379 rtd->dai_link->name); 3380 return; 3381 } 3382 3383 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 3384 rtd, &dpcm_state_fops); 3385 } 3386 #endif 3387