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_set_runtime_hwparams - set the runtime hardware parameters 39 * @substream: the pcm substream 40 * @hw: the hardware parameters 41 * 42 * Sets the substream runtime hardware parameters. 43 */ 44 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 45 const struct snd_pcm_hardware *hw) 46 { 47 struct snd_pcm_runtime *runtime = substream->runtime; 48 runtime->hw.info = hw->info; 49 runtime->hw.formats = hw->formats; 50 runtime->hw.period_bytes_min = hw->period_bytes_min; 51 runtime->hw.period_bytes_max = hw->period_bytes_max; 52 runtime->hw.periods_min = hw->periods_min; 53 runtime->hw.periods_max = hw->periods_max; 54 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; 55 runtime->hw.fifo_size = hw->fifo_size; 56 return 0; 57 } 58 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 59 60 /* DPCM stream event, send event to FE and all active BEs. */ 61 static int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 62 int event) 63 { 64 struct snd_soc_dpcm *dpcm; 65 66 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) { 67 68 struct snd_soc_pcm_runtime *be = dpcm->be; 69 70 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 71 be->dai_link->name, event, dir); 72 73 snd_soc_dapm_stream_event(be, dir, event); 74 } 75 76 snd_soc_dapm_stream_event(fe, dir, event); 77 78 return 0; 79 } 80 81 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 82 struct snd_soc_dai *soc_dai) 83 { 84 struct snd_soc_pcm_runtime *rtd = substream->private_data; 85 int ret; 86 87 if (!soc_dai->driver->symmetric_rates && 88 !rtd->dai_link->symmetric_rates) 89 return 0; 90 91 /* This can happen if multiple streams are starting simultaneously - 92 * the second can need to get its constraints before the first has 93 * picked a rate. Complain and allow the application to carry on. 94 */ 95 if (!soc_dai->rate) { 96 dev_warn(soc_dai->dev, 97 "ASoC: Not enforcing symmetric_rates due to race\n"); 98 return 0; 99 } 100 101 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", soc_dai->rate); 102 103 ret = snd_pcm_hw_constraint_minmax(substream->runtime, 104 SNDRV_PCM_HW_PARAM_RATE, 105 soc_dai->rate, soc_dai->rate); 106 if (ret < 0) { 107 dev_err(soc_dai->dev, 108 "ASoC: Unable to apply rate symmetry constraint: %d\n", 109 ret); 110 return ret; 111 } 112 113 return 0; 114 } 115 116 /* 117 * List of sample sizes that might go over the bus for parameter 118 * application. There ought to be a wildcard sample size for things 119 * like the DAC/ADC resolution to use but there isn't right now. 120 */ 121 static int sample_sizes[] = { 122 24, 32, 123 }; 124 125 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream, 126 struct snd_soc_dai *dai) 127 { 128 int ret, i, bits; 129 130 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 131 bits = dai->driver->playback.sig_bits; 132 else 133 bits = dai->driver->capture.sig_bits; 134 135 if (!bits) 136 return; 137 138 for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) { 139 if (bits >= sample_sizes[i]) 140 continue; 141 142 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 143 sample_sizes[i], bits); 144 if (ret != 0) 145 dev_warn(dai->dev, 146 "ASoC: Failed to set MSB %d/%d: %d\n", 147 bits, sample_sizes[i], ret); 148 } 149 } 150 151 static void soc_pcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 152 struct snd_soc_pcm_stream *codec_stream, 153 struct snd_soc_pcm_stream *cpu_stream) 154 { 155 struct snd_pcm_hardware *hw = &runtime->hw; 156 157 hw->channels_min = max(codec_stream->channels_min, 158 cpu_stream->channels_min); 159 hw->channels_max = min(codec_stream->channels_max, 160 cpu_stream->channels_max); 161 hw->formats = codec_stream->formats & cpu_stream->formats; 162 hw->rates = codec_stream->rates & cpu_stream->rates; 163 if (codec_stream->rates 164 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) 165 hw->rates |= cpu_stream->rates; 166 if (cpu_stream->rates 167 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS)) 168 hw->rates |= codec_stream->rates; 169 170 snd_pcm_limit_hw_rates(runtime); 171 172 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min); 173 hw->rate_min = max(hw->rate_min, codec_stream->rate_min); 174 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max); 175 hw->rate_max = min_not_zero(hw->rate_max, codec_stream->rate_max); 176 } 177 178 /* 179 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 180 * then initialized and any private data can be allocated. This also calls 181 * startup for the cpu DAI, platform, machine and codec DAI. 182 */ 183 static int soc_pcm_open(struct snd_pcm_substream *substream) 184 { 185 struct snd_soc_pcm_runtime *rtd = substream->private_data; 186 struct snd_pcm_runtime *runtime = substream->runtime; 187 struct snd_soc_platform *platform = rtd->platform; 188 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 189 struct snd_soc_dai *codec_dai = rtd->codec_dai; 190 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 191 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver; 192 int ret = 0; 193 194 pinctrl_pm_select_default_state(cpu_dai->dev); 195 pinctrl_pm_select_default_state(codec_dai->dev); 196 pm_runtime_get_sync(cpu_dai->dev); 197 pm_runtime_get_sync(codec_dai->dev); 198 pm_runtime_get_sync(platform->dev); 199 200 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 201 202 /* startup the audio subsystem */ 203 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) { 204 ret = cpu_dai->driver->ops->startup(substream, cpu_dai); 205 if (ret < 0) { 206 dev_err(cpu_dai->dev, "ASoC: can't open interface" 207 " %s: %d\n", cpu_dai->name, ret); 208 goto out; 209 } 210 } 211 212 if (platform->driver->ops && platform->driver->ops->open) { 213 ret = platform->driver->ops->open(substream); 214 if (ret < 0) { 215 dev_err(platform->dev, "ASoC: can't open platform" 216 " %s: %d\n", platform->name, ret); 217 goto platform_err; 218 } 219 } 220 221 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) { 222 ret = codec_dai->driver->ops->startup(substream, codec_dai); 223 if (ret < 0) { 224 dev_err(codec_dai->dev, "ASoC: can't open codec" 225 " %s: %d\n", codec_dai->name, ret); 226 goto codec_dai_err; 227 } 228 } 229 230 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) { 231 ret = rtd->dai_link->ops->startup(substream); 232 if (ret < 0) { 233 pr_err("ASoC: %s startup failed: %d\n", 234 rtd->dai_link->name, ret); 235 goto machine_err; 236 } 237 } 238 239 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 240 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 241 goto dynamic; 242 243 /* Check that the codec and cpu DAIs are compatible */ 244 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 245 soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->playback, 246 &cpu_dai_drv->playback); 247 } else { 248 soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->capture, 249 &cpu_dai_drv->capture); 250 } 251 252 ret = -EINVAL; 253 if (!runtime->hw.rates) { 254 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n", 255 codec_dai->name, cpu_dai->name); 256 goto config_err; 257 } 258 if (!runtime->hw.formats) { 259 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n", 260 codec_dai->name, cpu_dai->name); 261 goto config_err; 262 } 263 if (!runtime->hw.channels_min || !runtime->hw.channels_max || 264 runtime->hw.channels_min > runtime->hw.channels_max) { 265 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n", 266 codec_dai->name, cpu_dai->name); 267 goto config_err; 268 } 269 270 soc_pcm_apply_msb(substream, codec_dai); 271 soc_pcm_apply_msb(substream, cpu_dai); 272 273 /* Symmetry only applies if we've already got an active stream. */ 274 if (cpu_dai->active) { 275 ret = soc_pcm_apply_symmetry(substream, cpu_dai); 276 if (ret != 0) 277 goto config_err; 278 } 279 280 if (codec_dai->active) { 281 ret = soc_pcm_apply_symmetry(substream, codec_dai); 282 if (ret != 0) 283 goto config_err; 284 } 285 286 pr_debug("ASoC: %s <-> %s info:\n", 287 codec_dai->name, cpu_dai->name); 288 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates); 289 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min, 290 runtime->hw.channels_max); 291 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min, 292 runtime->hw.rate_max); 293 294 dynamic: 295 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 296 cpu_dai->playback_active++; 297 codec_dai->playback_active++; 298 } else { 299 cpu_dai->capture_active++; 300 codec_dai->capture_active++; 301 } 302 cpu_dai->active++; 303 codec_dai->active++; 304 rtd->codec->active++; 305 mutex_unlock(&rtd->pcm_mutex); 306 return 0; 307 308 config_err: 309 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) 310 rtd->dai_link->ops->shutdown(substream); 311 312 machine_err: 313 if (codec_dai->driver->ops->shutdown) 314 codec_dai->driver->ops->shutdown(substream, codec_dai); 315 316 codec_dai_err: 317 if (platform->driver->ops && platform->driver->ops->close) 318 platform->driver->ops->close(substream); 319 320 platform_err: 321 if (cpu_dai->driver->ops->shutdown) 322 cpu_dai->driver->ops->shutdown(substream, cpu_dai); 323 out: 324 mutex_unlock(&rtd->pcm_mutex); 325 326 pm_runtime_put(platform->dev); 327 pm_runtime_put(codec_dai->dev); 328 pm_runtime_put(cpu_dai->dev); 329 if (!codec_dai->active) 330 pinctrl_pm_select_sleep_state(codec_dai->dev); 331 if (!cpu_dai->active) 332 pinctrl_pm_select_sleep_state(cpu_dai->dev); 333 334 return ret; 335 } 336 337 /* 338 * Power down the audio subsystem pmdown_time msecs after close is called. 339 * This is to ensure there are no pops or clicks in between any music tracks 340 * due to DAPM power cycling. 341 */ 342 static void close_delayed_work(struct work_struct *work) 343 { 344 struct snd_soc_pcm_runtime *rtd = 345 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work); 346 struct snd_soc_dai *codec_dai = rtd->codec_dai; 347 348 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 349 350 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n", 351 codec_dai->driver->playback.stream_name, 352 codec_dai->playback_active ? "active" : "inactive", 353 rtd->pop_wait ? "yes" : "no"); 354 355 /* are we waiting on this codec DAI stream */ 356 if (rtd->pop_wait == 1) { 357 rtd->pop_wait = 0; 358 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, 359 SND_SOC_DAPM_STREAM_STOP); 360 } 361 362 mutex_unlock(&rtd->pcm_mutex); 363 } 364 365 /* 366 * Called by ALSA when a PCM substream is closed. Private data can be 367 * freed here. The cpu DAI, codec DAI, machine and platform are also 368 * shutdown. 369 */ 370 static int soc_pcm_close(struct snd_pcm_substream *substream) 371 { 372 struct snd_soc_pcm_runtime *rtd = substream->private_data; 373 struct snd_soc_platform *platform = rtd->platform; 374 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 375 struct snd_soc_dai *codec_dai = rtd->codec_dai; 376 struct snd_soc_codec *codec = rtd->codec; 377 378 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 379 380 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 381 cpu_dai->playback_active--; 382 codec_dai->playback_active--; 383 } else { 384 cpu_dai->capture_active--; 385 codec_dai->capture_active--; 386 } 387 388 cpu_dai->active--; 389 codec_dai->active--; 390 codec->active--; 391 392 /* clear the corresponding DAIs rate when inactive */ 393 if (!cpu_dai->active) 394 cpu_dai->rate = 0; 395 396 if (!codec_dai->active) 397 codec_dai->rate = 0; 398 399 /* Muting the DAC suppresses artifacts caused during digital 400 * shutdown, for example from stopping clocks. 401 */ 402 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream); 403 404 if (cpu_dai->driver->ops->shutdown) 405 cpu_dai->driver->ops->shutdown(substream, cpu_dai); 406 407 if (codec_dai->driver->ops->shutdown) 408 codec_dai->driver->ops->shutdown(substream, codec_dai); 409 410 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) 411 rtd->dai_link->ops->shutdown(substream); 412 413 if (platform->driver->ops && platform->driver->ops->close) 414 platform->driver->ops->close(substream); 415 cpu_dai->runtime = NULL; 416 417 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 418 if (!rtd->pmdown_time || codec->ignore_pmdown_time || 419 rtd->dai_link->ignore_pmdown_time) { 420 /* powered down playback stream now */ 421 snd_soc_dapm_stream_event(rtd, 422 SNDRV_PCM_STREAM_PLAYBACK, 423 SND_SOC_DAPM_STREAM_STOP); 424 } else { 425 /* start delayed pop wq here for playback streams */ 426 rtd->pop_wait = 1; 427 queue_delayed_work(system_power_efficient_wq, 428 &rtd->delayed_work, 429 msecs_to_jiffies(rtd->pmdown_time)); 430 } 431 } else { 432 /* capture streams can be powered down now */ 433 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE, 434 SND_SOC_DAPM_STREAM_STOP); 435 } 436 437 mutex_unlock(&rtd->pcm_mutex); 438 439 pm_runtime_put(platform->dev); 440 pm_runtime_put(codec_dai->dev); 441 pm_runtime_put(cpu_dai->dev); 442 if (!codec_dai->active) 443 pinctrl_pm_select_sleep_state(codec_dai->dev); 444 if (!cpu_dai->active) 445 pinctrl_pm_select_sleep_state(cpu_dai->dev); 446 447 return 0; 448 } 449 450 /* 451 * Called by ALSA when the PCM substream is prepared, can set format, sample 452 * rate, etc. This function is non atomic and can be called multiple times, 453 * it can refer to the runtime info. 454 */ 455 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 456 { 457 struct snd_soc_pcm_runtime *rtd = substream->private_data; 458 struct snd_soc_platform *platform = rtd->platform; 459 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 460 struct snd_soc_dai *codec_dai = rtd->codec_dai; 461 int ret = 0; 462 463 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 464 465 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) { 466 ret = rtd->dai_link->ops->prepare(substream); 467 if (ret < 0) { 468 dev_err(rtd->card->dev, "ASoC: machine prepare error:" 469 " %d\n", ret); 470 goto out; 471 } 472 } 473 474 if (platform->driver->ops && platform->driver->ops->prepare) { 475 ret = platform->driver->ops->prepare(substream); 476 if (ret < 0) { 477 dev_err(platform->dev, "ASoC: platform prepare error:" 478 " %d\n", ret); 479 goto out; 480 } 481 } 482 483 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) { 484 ret = codec_dai->driver->ops->prepare(substream, codec_dai); 485 if (ret < 0) { 486 dev_err(codec_dai->dev, "ASoC: DAI prepare error: %d\n", 487 ret); 488 goto out; 489 } 490 } 491 492 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) { 493 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai); 494 if (ret < 0) { 495 dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n", 496 ret); 497 goto out; 498 } 499 } 500 501 /* cancel any delayed stream shutdown that is pending */ 502 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 503 rtd->pop_wait) { 504 rtd->pop_wait = 0; 505 cancel_delayed_work(&rtd->delayed_work); 506 } 507 508 snd_soc_dapm_stream_event(rtd, substream->stream, 509 SND_SOC_DAPM_STREAM_START); 510 511 snd_soc_dai_digital_mute(codec_dai, 0, substream->stream); 512 513 out: 514 mutex_unlock(&rtd->pcm_mutex); 515 return ret; 516 } 517 518 /* 519 * Called by ALSA when the hardware params are set by application. This 520 * function can also be called multiple times and can allocate buffers 521 * (using snd_pcm_lib_* ). It's non-atomic. 522 */ 523 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 524 struct snd_pcm_hw_params *params) 525 { 526 struct snd_soc_pcm_runtime *rtd = substream->private_data; 527 struct snd_soc_platform *platform = rtd->platform; 528 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 529 struct snd_soc_dai *codec_dai = rtd->codec_dai; 530 int ret = 0; 531 532 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 533 534 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) { 535 ret = rtd->dai_link->ops->hw_params(substream, params); 536 if (ret < 0) { 537 dev_err(rtd->card->dev, "ASoC: machine hw_params" 538 " failed: %d\n", ret); 539 goto out; 540 } 541 } 542 543 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_params) { 544 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai); 545 if (ret < 0) { 546 dev_err(codec_dai->dev, "ASoC: can't set %s hw params:" 547 " %d\n", codec_dai->name, ret); 548 goto codec_err; 549 } 550 } 551 552 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_params) { 553 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai); 554 if (ret < 0) { 555 dev_err(cpu_dai->dev, "ASoC: %s hw params failed: %d\n", 556 cpu_dai->name, ret); 557 goto interface_err; 558 } 559 } 560 561 if (platform->driver->ops && platform->driver->ops->hw_params) { 562 ret = platform->driver->ops->hw_params(substream, params); 563 if (ret < 0) { 564 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n", 565 platform->name, ret); 566 goto platform_err; 567 } 568 } 569 570 /* store the rate for each DAIs */ 571 cpu_dai->rate = params_rate(params); 572 codec_dai->rate = params_rate(params); 573 574 out: 575 mutex_unlock(&rtd->pcm_mutex); 576 return ret; 577 578 platform_err: 579 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free) 580 cpu_dai->driver->ops->hw_free(substream, cpu_dai); 581 582 interface_err: 583 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free) 584 codec_dai->driver->ops->hw_free(substream, codec_dai); 585 586 codec_err: 587 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) 588 rtd->dai_link->ops->hw_free(substream); 589 590 mutex_unlock(&rtd->pcm_mutex); 591 return ret; 592 } 593 594 /* 595 * Frees resources allocated by hw_params, can be called multiple times 596 */ 597 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 598 { 599 struct snd_soc_pcm_runtime *rtd = substream->private_data; 600 struct snd_soc_platform *platform = rtd->platform; 601 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 602 struct snd_soc_dai *codec_dai = rtd->codec_dai; 603 struct snd_soc_codec *codec = rtd->codec; 604 605 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 606 607 /* apply codec digital mute */ 608 if (!codec->active) 609 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream); 610 611 /* free any machine hw params */ 612 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) 613 rtd->dai_link->ops->hw_free(substream); 614 615 /* free any DMA resources */ 616 if (platform->driver->ops && platform->driver->ops->hw_free) 617 platform->driver->ops->hw_free(substream); 618 619 /* now free hw params for the DAIs */ 620 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free) 621 codec_dai->driver->ops->hw_free(substream, codec_dai); 622 623 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free) 624 cpu_dai->driver->ops->hw_free(substream, cpu_dai); 625 626 mutex_unlock(&rtd->pcm_mutex); 627 return 0; 628 } 629 630 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 631 { 632 struct snd_soc_pcm_runtime *rtd = substream->private_data; 633 struct snd_soc_platform *platform = rtd->platform; 634 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 635 struct snd_soc_dai *codec_dai = rtd->codec_dai; 636 int ret; 637 638 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) { 639 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai); 640 if (ret < 0) 641 return ret; 642 } 643 644 if (platform->driver->ops && platform->driver->ops->trigger) { 645 ret = platform->driver->ops->trigger(substream, cmd); 646 if (ret < 0) 647 return ret; 648 } 649 650 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) { 651 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai); 652 if (ret < 0) 653 return ret; 654 } 655 return 0; 656 } 657 658 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream, 659 int cmd) 660 { 661 struct snd_soc_pcm_runtime *rtd = substream->private_data; 662 struct snd_soc_platform *platform = rtd->platform; 663 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 664 struct snd_soc_dai *codec_dai = rtd->codec_dai; 665 int ret; 666 667 if (codec_dai->driver->ops && 668 codec_dai->driver->ops->bespoke_trigger) { 669 ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai); 670 if (ret < 0) 671 return ret; 672 } 673 674 if (platform->driver->ops && platform->driver->bespoke_trigger) { 675 ret = platform->driver->bespoke_trigger(substream, cmd); 676 if (ret < 0) 677 return ret; 678 } 679 680 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) { 681 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai); 682 if (ret < 0) 683 return ret; 684 } 685 return 0; 686 } 687 /* 688 * soc level wrapper for pointer callback 689 * If cpu_dai, codec_dai, platform driver has the delay callback, than 690 * the runtime->delay will be updated accordingly. 691 */ 692 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 693 { 694 struct snd_soc_pcm_runtime *rtd = substream->private_data; 695 struct snd_soc_platform *platform = rtd->platform; 696 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 697 struct snd_soc_dai *codec_dai = rtd->codec_dai; 698 struct snd_pcm_runtime *runtime = substream->runtime; 699 snd_pcm_uframes_t offset = 0; 700 snd_pcm_sframes_t delay = 0; 701 702 if (platform->driver->ops && platform->driver->ops->pointer) 703 offset = platform->driver->ops->pointer(substream); 704 705 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay) 706 delay += cpu_dai->driver->ops->delay(substream, cpu_dai); 707 708 if (codec_dai->driver->ops && codec_dai->driver->ops->delay) 709 delay += codec_dai->driver->ops->delay(substream, codec_dai); 710 711 if (platform->driver->delay) 712 delay += platform->driver->delay(substream, codec_dai); 713 714 runtime->delay = delay; 715 716 return offset; 717 } 718 719 /* connect a FE and BE */ 720 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 721 struct snd_soc_pcm_runtime *be, int stream) 722 { 723 struct snd_soc_dpcm *dpcm; 724 725 /* only add new dpcms */ 726 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 727 if (dpcm->be == be && dpcm->fe == fe) 728 return 0; 729 } 730 731 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 732 if (!dpcm) 733 return -ENOMEM; 734 735 dpcm->be = be; 736 dpcm->fe = fe; 737 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 738 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 739 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 740 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 741 742 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 743 stream ? "capture" : "playback", fe->dai_link->name, 744 stream ? "<-" : "->", be->dai_link->name); 745 746 #ifdef CONFIG_DEBUG_FS 747 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644, 748 fe->debugfs_dpcm_root, &dpcm->state); 749 #endif 750 return 1; 751 } 752 753 /* reparent a BE onto another FE */ 754 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 755 struct snd_soc_pcm_runtime *be, int stream) 756 { 757 struct snd_soc_dpcm *dpcm; 758 struct snd_pcm_substream *fe_substream, *be_substream; 759 760 /* reparent if BE is connected to other FEs */ 761 if (!be->dpcm[stream].users) 762 return; 763 764 be_substream = snd_soc_dpcm_get_substream(be, stream); 765 766 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 767 if (dpcm->fe == fe) 768 continue; 769 770 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 771 stream ? "capture" : "playback", 772 dpcm->fe->dai_link->name, 773 stream ? "<-" : "->", dpcm->be->dai_link->name); 774 775 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 776 be_substream->runtime = fe_substream->runtime; 777 break; 778 } 779 } 780 781 /* disconnect a BE and FE */ 782 static void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 783 { 784 struct snd_soc_dpcm *dpcm, *d; 785 786 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) { 787 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 788 stream ? "capture" : "playback", 789 dpcm->be->dai_link->name); 790 791 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 792 continue; 793 794 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 795 stream ? "capture" : "playback", fe->dai_link->name, 796 stream ? "<-" : "->", dpcm->be->dai_link->name); 797 798 /* BEs still alive need new FE */ 799 dpcm_be_reparent(fe, dpcm->be, stream); 800 801 #ifdef CONFIG_DEBUG_FS 802 debugfs_remove(dpcm->debugfs_state); 803 #endif 804 list_del(&dpcm->list_be); 805 list_del(&dpcm->list_fe); 806 kfree(dpcm); 807 } 808 } 809 810 /* get BE for DAI widget and stream */ 811 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 812 struct snd_soc_dapm_widget *widget, int stream) 813 { 814 struct snd_soc_pcm_runtime *be; 815 int i; 816 817 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 818 for (i = 0; i < card->num_links; i++) { 819 be = &card->rtd[i]; 820 821 if (!be->dai_link->no_pcm) 822 continue; 823 824 if (be->cpu_dai->playback_widget == widget || 825 be->codec_dai->playback_widget == widget) 826 return be; 827 } 828 } else { 829 830 for (i = 0; i < card->num_links; i++) { 831 be = &card->rtd[i]; 832 833 if (!be->dai_link->no_pcm) 834 continue; 835 836 if (be->cpu_dai->capture_widget == widget || 837 be->codec_dai->capture_widget == widget) 838 return be; 839 } 840 } 841 842 dev_err(card->dev, "ASoC: can't get %s BE for %s\n", 843 stream ? "capture" : "playback", widget->name); 844 return NULL; 845 } 846 847 static inline struct snd_soc_dapm_widget * 848 rtd_get_cpu_widget(struct snd_soc_pcm_runtime *rtd, int stream) 849 { 850 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 851 return rtd->cpu_dai->playback_widget; 852 else 853 return rtd->cpu_dai->capture_widget; 854 } 855 856 static inline struct snd_soc_dapm_widget * 857 rtd_get_codec_widget(struct snd_soc_pcm_runtime *rtd, int stream) 858 { 859 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 860 return rtd->codec_dai->playback_widget; 861 else 862 return rtd->codec_dai->capture_widget; 863 } 864 865 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 866 struct snd_soc_dapm_widget *widget) 867 { 868 int i; 869 870 for (i = 0; i < list->num_widgets; i++) { 871 if (widget == list->widgets[i]) 872 return 1; 873 } 874 875 return 0; 876 } 877 878 static int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 879 int stream, struct snd_soc_dapm_widget_list **list_) 880 { 881 struct snd_soc_dai *cpu_dai = fe->cpu_dai; 882 struct snd_soc_dapm_widget_list *list; 883 int paths; 884 885 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) + 886 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL); 887 if (list == NULL) 888 return -ENOMEM; 889 890 /* get number of valid DAI paths and their widgets */ 891 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list); 892 893 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 894 stream ? "capture" : "playback"); 895 896 *list_ = list; 897 return paths; 898 } 899 900 static inline void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 901 { 902 kfree(*list); 903 } 904 905 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 906 struct snd_soc_dapm_widget_list **list_) 907 { 908 struct snd_soc_dpcm *dpcm; 909 struct snd_soc_dapm_widget_list *list = *list_; 910 struct snd_soc_dapm_widget *widget; 911 int prune = 0; 912 913 /* Destroy any old FE <--> BE connections */ 914 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 915 916 /* is there a valid CPU DAI widget for this BE */ 917 widget = rtd_get_cpu_widget(dpcm->be, stream); 918 919 /* prune the BE if it's no longer in our active list */ 920 if (widget && widget_in_list(list, widget)) 921 continue; 922 923 /* is there a valid CODEC DAI widget for this BE */ 924 widget = rtd_get_codec_widget(dpcm->be, stream); 925 926 /* prune the BE if it's no longer in our active list */ 927 if (widget && widget_in_list(list, widget)) 928 continue; 929 930 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 931 stream ? "capture" : "playback", 932 dpcm->be->dai_link->name, fe->dai_link->name); 933 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 934 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 935 prune++; 936 } 937 938 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 939 return prune; 940 } 941 942 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 943 struct snd_soc_dapm_widget_list **list_) 944 { 945 struct snd_soc_card *card = fe->card; 946 struct snd_soc_dapm_widget_list *list = *list_; 947 struct snd_soc_pcm_runtime *be; 948 int i, new = 0, err; 949 950 /* Create any new FE <--> BE connections */ 951 for (i = 0; i < list->num_widgets; i++) { 952 953 switch (list->widgets[i]->id) { 954 case snd_soc_dapm_dai_in: 955 case snd_soc_dapm_dai_out: 956 break; 957 default: 958 continue; 959 } 960 961 /* is there a valid BE rtd for this widget */ 962 be = dpcm_get_be(card, list->widgets[i], stream); 963 if (!be) { 964 dev_err(fe->dev, "ASoC: no BE found for %s\n", 965 list->widgets[i]->name); 966 continue; 967 } 968 969 /* make sure BE is a real BE */ 970 if (!be->dai_link->no_pcm) 971 continue; 972 973 /* don't connect if FE is not running */ 974 if (!fe->dpcm[stream].runtime) 975 continue; 976 977 /* newly connected FE and BE */ 978 err = dpcm_be_connect(fe, be, stream); 979 if (err < 0) { 980 dev_err(fe->dev, "ASoC: can't connect %s\n", 981 list->widgets[i]->name); 982 break; 983 } else if (err == 0) /* already connected */ 984 continue; 985 986 /* new */ 987 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 988 new++; 989 } 990 991 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 992 return new; 993 } 994 995 /* 996 * Find the corresponding BE DAIs that source or sink audio to this 997 * FE substream. 998 */ 999 static int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1000 int stream, struct snd_soc_dapm_widget_list **list, int new) 1001 { 1002 if (new) 1003 return dpcm_add_paths(fe, stream, list); 1004 else 1005 return dpcm_prune_paths(fe, stream, list); 1006 } 1007 1008 static void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1009 { 1010 struct snd_soc_dpcm *dpcm; 1011 1012 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 1013 dpcm->be->dpcm[stream].runtime_update = 1014 SND_SOC_DPCM_UPDATE_NO; 1015 } 1016 1017 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1018 int stream) 1019 { 1020 struct snd_soc_dpcm *dpcm; 1021 1022 /* disable any enabled and non active backends */ 1023 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1024 1025 struct snd_soc_pcm_runtime *be = dpcm->be; 1026 struct snd_pcm_substream *be_substream = 1027 snd_soc_dpcm_get_substream(be, stream); 1028 1029 if (be->dpcm[stream].users == 0) 1030 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1031 stream ? "capture" : "playback", 1032 be->dpcm[stream].state); 1033 1034 if (--be->dpcm[stream].users != 0) 1035 continue; 1036 1037 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1038 continue; 1039 1040 soc_pcm_close(be_substream); 1041 be_substream->runtime = NULL; 1042 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1043 } 1044 } 1045 1046 static int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1047 { 1048 struct snd_soc_dpcm *dpcm; 1049 int err, count = 0; 1050 1051 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1052 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1053 1054 struct snd_soc_pcm_runtime *be = dpcm->be; 1055 struct snd_pcm_substream *be_substream = 1056 snd_soc_dpcm_get_substream(be, stream); 1057 1058 if (!be_substream) { 1059 dev_err(be->dev, "ASoC: no backend %s stream\n", 1060 stream ? "capture" : "playback"); 1061 continue; 1062 } 1063 1064 /* is this op for this BE ? */ 1065 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1066 continue; 1067 1068 /* first time the dpcm is open ? */ 1069 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1070 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1071 stream ? "capture" : "playback", 1072 be->dpcm[stream].state); 1073 1074 if (be->dpcm[stream].users++ != 0) 1075 continue; 1076 1077 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1078 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1079 continue; 1080 1081 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1082 stream ? "capture" : "playback", be->dai_link->name); 1083 1084 be_substream->runtime = be->dpcm[stream].runtime; 1085 err = soc_pcm_open(be_substream); 1086 if (err < 0) { 1087 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1088 be->dpcm[stream].users--; 1089 if (be->dpcm[stream].users < 0) 1090 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1091 stream ? "capture" : "playback", 1092 be->dpcm[stream].state); 1093 1094 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1095 goto unwind; 1096 } 1097 1098 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1099 count++; 1100 } 1101 1102 return count; 1103 1104 unwind: 1105 /* disable any enabled and non active backends */ 1106 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1107 struct snd_soc_pcm_runtime *be = dpcm->be; 1108 struct snd_pcm_substream *be_substream = 1109 snd_soc_dpcm_get_substream(be, stream); 1110 1111 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1112 continue; 1113 1114 if (be->dpcm[stream].users == 0) 1115 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1116 stream ? "capture" : "playback", 1117 be->dpcm[stream].state); 1118 1119 if (--be->dpcm[stream].users != 0) 1120 continue; 1121 1122 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1123 continue; 1124 1125 soc_pcm_close(be_substream); 1126 be_substream->runtime = NULL; 1127 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1128 } 1129 1130 return err; 1131 } 1132 1133 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1134 { 1135 struct snd_pcm_runtime *runtime = substream->runtime; 1136 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1137 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1138 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 1139 1140 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1141 runtime->hw.rate_min = cpu_dai_drv->playback.rate_min; 1142 runtime->hw.rate_max = cpu_dai_drv->playback.rate_max; 1143 runtime->hw.channels_min = cpu_dai_drv->playback.channels_min; 1144 runtime->hw.channels_max = cpu_dai_drv->playback.channels_max; 1145 runtime->hw.formats &= cpu_dai_drv->playback.formats; 1146 runtime->hw.rates = cpu_dai_drv->playback.rates; 1147 } else { 1148 runtime->hw.rate_min = cpu_dai_drv->capture.rate_min; 1149 runtime->hw.rate_max = cpu_dai_drv->capture.rate_max; 1150 runtime->hw.channels_min = cpu_dai_drv->capture.channels_min; 1151 runtime->hw.channels_max = cpu_dai_drv->capture.channels_max; 1152 runtime->hw.formats &= cpu_dai_drv->capture.formats; 1153 runtime->hw.rates = cpu_dai_drv->capture.rates; 1154 } 1155 } 1156 1157 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1158 { 1159 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1160 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1161 int stream = fe_substream->stream, ret = 0; 1162 1163 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1164 1165 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1166 if (ret < 0) { 1167 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1168 goto be_err; 1169 } 1170 1171 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1172 1173 /* start the DAI frontend */ 1174 ret = soc_pcm_open(fe_substream); 1175 if (ret < 0) { 1176 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 1177 goto unwind; 1178 } 1179 1180 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1181 1182 dpcm_set_fe_runtime(fe_substream); 1183 snd_pcm_limit_hw_rates(runtime); 1184 1185 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1186 return 0; 1187 1188 unwind: 1189 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1190 be_err: 1191 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1192 return ret; 1193 } 1194 1195 static int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1196 { 1197 struct snd_soc_dpcm *dpcm; 1198 1199 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 1200 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1201 1202 struct snd_soc_pcm_runtime *be = dpcm->be; 1203 struct snd_pcm_substream *be_substream = 1204 snd_soc_dpcm_get_substream(be, stream); 1205 1206 /* is this op for this BE ? */ 1207 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1208 continue; 1209 1210 if (be->dpcm[stream].users == 0) 1211 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1212 stream ? "capture" : "playback", 1213 be->dpcm[stream].state); 1214 1215 if (--be->dpcm[stream].users != 0) 1216 continue; 1217 1218 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1219 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) 1220 continue; 1221 1222 dev_dbg(be->dev, "ASoC: close BE %s\n", 1223 dpcm->fe->dai_link->name); 1224 1225 soc_pcm_close(be_substream); 1226 be_substream->runtime = NULL; 1227 1228 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1229 } 1230 return 0; 1231 } 1232 1233 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1234 { 1235 struct snd_soc_pcm_runtime *fe = substream->private_data; 1236 int stream = substream->stream; 1237 1238 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1239 1240 /* shutdown the BEs */ 1241 dpcm_be_dai_shutdown(fe, substream->stream); 1242 1243 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1244 1245 /* now shutdown the frontend */ 1246 soc_pcm_close(substream); 1247 1248 /* run the stream event for each BE */ 1249 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1250 1251 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1252 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1253 return 0; 1254 } 1255 1256 static int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1257 { 1258 struct snd_soc_dpcm *dpcm; 1259 1260 /* only hw_params backends that are either sinks or sources 1261 * to this frontend DAI */ 1262 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1263 1264 struct snd_soc_pcm_runtime *be = dpcm->be; 1265 struct snd_pcm_substream *be_substream = 1266 snd_soc_dpcm_get_substream(be, stream); 1267 1268 /* is this op for this BE ? */ 1269 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1270 continue; 1271 1272 /* only free hw when no longer used - check all FEs */ 1273 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1274 continue; 1275 1276 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1277 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1278 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1279 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1280 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1281 continue; 1282 1283 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1284 dpcm->fe->dai_link->name); 1285 1286 soc_pcm_hw_free(be_substream); 1287 1288 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1289 } 1290 1291 return 0; 1292 } 1293 1294 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1295 { 1296 struct snd_soc_pcm_runtime *fe = substream->private_data; 1297 int err, stream = substream->stream; 1298 1299 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1300 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1301 1302 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1303 1304 /* call hw_free on the frontend */ 1305 err = soc_pcm_hw_free(substream); 1306 if (err < 0) 1307 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 1308 fe->dai_link->name); 1309 1310 /* only hw_params backends that are either sinks or sources 1311 * to this frontend DAI */ 1312 err = dpcm_be_dai_hw_free(fe, stream); 1313 1314 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1315 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1316 1317 mutex_unlock(&fe->card->mutex); 1318 return 0; 1319 } 1320 1321 static int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1322 { 1323 struct snd_soc_dpcm *dpcm; 1324 int ret; 1325 1326 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1327 1328 struct snd_soc_pcm_runtime *be = dpcm->be; 1329 struct snd_pcm_substream *be_substream = 1330 snd_soc_dpcm_get_substream(be, stream); 1331 1332 /* is this op for this BE ? */ 1333 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1334 continue; 1335 1336 /* only allow hw_params() if no connected FEs are running */ 1337 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 1338 continue; 1339 1340 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1341 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1342 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 1343 continue; 1344 1345 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 1346 dpcm->fe->dai_link->name); 1347 1348 /* copy params for each dpcm */ 1349 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1350 sizeof(struct snd_pcm_hw_params)); 1351 1352 /* perform any hw_params fixups */ 1353 if (be->dai_link->be_hw_params_fixup) { 1354 ret = be->dai_link->be_hw_params_fixup(be, 1355 &dpcm->hw_params); 1356 if (ret < 0) { 1357 dev_err(be->dev, 1358 "ASoC: hw_params BE fixup failed %d\n", 1359 ret); 1360 goto unwind; 1361 } 1362 } 1363 1364 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 1365 if (ret < 0) { 1366 dev_err(dpcm->be->dev, 1367 "ASoC: hw_params BE failed %d\n", ret); 1368 goto unwind; 1369 } 1370 1371 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1372 } 1373 return 0; 1374 1375 unwind: 1376 /* disable any enabled and non active backends */ 1377 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1378 struct snd_soc_pcm_runtime *be = dpcm->be; 1379 struct snd_pcm_substream *be_substream = 1380 snd_soc_dpcm_get_substream(be, stream); 1381 1382 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1383 continue; 1384 1385 /* only allow hw_free() if no connected FEs are running */ 1386 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1387 continue; 1388 1389 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1390 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1391 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1392 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1393 continue; 1394 1395 soc_pcm_hw_free(be_substream); 1396 } 1397 1398 return ret; 1399 } 1400 1401 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 1402 struct snd_pcm_hw_params *params) 1403 { 1404 struct snd_soc_pcm_runtime *fe = substream->private_data; 1405 int ret, stream = substream->stream; 1406 1407 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1408 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1409 1410 memcpy(&fe->dpcm[substream->stream].hw_params, params, 1411 sizeof(struct snd_pcm_hw_params)); 1412 ret = dpcm_be_dai_hw_params(fe, substream->stream); 1413 if (ret < 0) { 1414 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 1415 goto out; 1416 } 1417 1418 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 1419 fe->dai_link->name, params_rate(params), 1420 params_channels(params), params_format(params)); 1421 1422 /* call hw_params on the frontend */ 1423 ret = soc_pcm_hw_params(substream, params); 1424 if (ret < 0) { 1425 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 1426 dpcm_be_dai_hw_free(fe, stream); 1427 } else 1428 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1429 1430 out: 1431 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1432 mutex_unlock(&fe->card->mutex); 1433 return ret; 1434 } 1435 1436 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 1437 struct snd_pcm_substream *substream, int cmd) 1438 { 1439 int ret; 1440 1441 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 1442 dpcm->fe->dai_link->name, cmd); 1443 1444 ret = soc_pcm_trigger(substream, cmd); 1445 if (ret < 0) 1446 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 1447 1448 return ret; 1449 } 1450 1451 static int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 1452 int cmd) 1453 { 1454 struct snd_soc_dpcm *dpcm; 1455 int ret = 0; 1456 1457 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1458 1459 struct snd_soc_pcm_runtime *be = dpcm->be; 1460 struct snd_pcm_substream *be_substream = 1461 snd_soc_dpcm_get_substream(be, stream); 1462 1463 /* is this op for this BE ? */ 1464 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1465 continue; 1466 1467 switch (cmd) { 1468 case SNDRV_PCM_TRIGGER_START: 1469 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1470 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1471 continue; 1472 1473 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1474 if (ret) 1475 return ret; 1476 1477 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1478 break; 1479 case SNDRV_PCM_TRIGGER_RESUME: 1480 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1481 continue; 1482 1483 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1484 if (ret) 1485 return ret; 1486 1487 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1488 break; 1489 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1490 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 1491 continue; 1492 1493 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1494 if (ret) 1495 return ret; 1496 1497 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1498 break; 1499 case SNDRV_PCM_TRIGGER_STOP: 1500 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1501 continue; 1502 1503 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1504 continue; 1505 1506 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1507 if (ret) 1508 return ret; 1509 1510 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 1511 break; 1512 case SNDRV_PCM_TRIGGER_SUSPEND: 1513 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) 1514 continue; 1515 1516 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1517 continue; 1518 1519 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1520 if (ret) 1521 return ret; 1522 1523 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 1524 break; 1525 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1526 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1527 continue; 1528 1529 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1530 continue; 1531 1532 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1533 if (ret) 1534 return ret; 1535 1536 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 1537 break; 1538 } 1539 } 1540 1541 return ret; 1542 } 1543 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 1544 1545 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 1546 { 1547 struct snd_soc_pcm_runtime *fe = substream->private_data; 1548 int stream = substream->stream, ret; 1549 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 1550 1551 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1552 1553 switch (trigger) { 1554 case SND_SOC_DPCM_TRIGGER_PRE: 1555 /* call trigger on the frontend before the backend. */ 1556 1557 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 1558 fe->dai_link->name, cmd); 1559 1560 ret = soc_pcm_trigger(substream, cmd); 1561 if (ret < 0) { 1562 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1563 goto out; 1564 } 1565 1566 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1567 break; 1568 case SND_SOC_DPCM_TRIGGER_POST: 1569 /* call trigger on the frontend after the backend. */ 1570 1571 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1572 if (ret < 0) { 1573 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1574 goto out; 1575 } 1576 1577 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 1578 fe->dai_link->name, cmd); 1579 1580 ret = soc_pcm_trigger(substream, cmd); 1581 break; 1582 case SND_SOC_DPCM_TRIGGER_BESPOKE: 1583 /* bespoke trigger() - handles both FE and BEs */ 1584 1585 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 1586 fe->dai_link->name, cmd); 1587 1588 ret = soc_pcm_bespoke_trigger(substream, cmd); 1589 if (ret < 0) { 1590 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1591 goto out; 1592 } 1593 break; 1594 default: 1595 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 1596 fe->dai_link->name); 1597 ret = -EINVAL; 1598 goto out; 1599 } 1600 1601 switch (cmd) { 1602 case SNDRV_PCM_TRIGGER_START: 1603 case SNDRV_PCM_TRIGGER_RESUME: 1604 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1605 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1606 break; 1607 case SNDRV_PCM_TRIGGER_STOP: 1608 case SNDRV_PCM_TRIGGER_SUSPEND: 1609 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1610 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 1611 break; 1612 } 1613 1614 out: 1615 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1616 return ret; 1617 } 1618 1619 static int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 1620 { 1621 struct snd_soc_dpcm *dpcm; 1622 int ret = 0; 1623 1624 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1625 1626 struct snd_soc_pcm_runtime *be = dpcm->be; 1627 struct snd_pcm_substream *be_substream = 1628 snd_soc_dpcm_get_substream(be, stream); 1629 1630 /* is this op for this BE ? */ 1631 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1632 continue; 1633 1634 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1635 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1636 continue; 1637 1638 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 1639 dpcm->fe->dai_link->name); 1640 1641 ret = soc_pcm_prepare(be_substream); 1642 if (ret < 0) { 1643 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 1644 ret); 1645 break; 1646 } 1647 1648 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 1649 } 1650 return ret; 1651 } 1652 1653 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 1654 { 1655 struct snd_soc_pcm_runtime *fe = substream->private_data; 1656 int stream = substream->stream, ret = 0; 1657 1658 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1659 1660 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 1661 1662 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1663 1664 /* there is no point preparing this FE if there are no BEs */ 1665 if (list_empty(&fe->dpcm[stream].be_clients)) { 1666 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 1667 fe->dai_link->name); 1668 ret = -EINVAL; 1669 goto out; 1670 } 1671 1672 ret = dpcm_be_dai_prepare(fe, substream->stream); 1673 if (ret < 0) 1674 goto out; 1675 1676 /* call prepare on the frontend */ 1677 ret = soc_pcm_prepare(substream); 1678 if (ret < 0) { 1679 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 1680 fe->dai_link->name); 1681 goto out; 1682 } 1683 1684 /* run the stream event for each BE */ 1685 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 1686 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 1687 1688 out: 1689 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1690 mutex_unlock(&fe->card->mutex); 1691 1692 return ret; 1693 } 1694 1695 static int soc_pcm_ioctl(struct snd_pcm_substream *substream, 1696 unsigned int cmd, void *arg) 1697 { 1698 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1699 struct snd_soc_platform *platform = rtd->platform; 1700 1701 if (platform->driver->ops && platform->driver->ops->ioctl) 1702 return platform->driver->ops->ioctl(substream, cmd, arg); 1703 return snd_pcm_lib_ioctl(substream, cmd, arg); 1704 } 1705 1706 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1707 { 1708 struct snd_pcm_substream *substream = 1709 snd_soc_dpcm_get_substream(fe, stream); 1710 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 1711 int err; 1712 1713 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 1714 stream ? "capture" : "playback", fe->dai_link->name); 1715 1716 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 1717 /* call bespoke trigger - FE takes care of all BE triggers */ 1718 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 1719 fe->dai_link->name); 1720 1721 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 1722 if (err < 0) 1723 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 1724 } else { 1725 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 1726 fe->dai_link->name); 1727 1728 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 1729 if (err < 0) 1730 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 1731 } 1732 1733 err = dpcm_be_dai_hw_free(fe, stream); 1734 if (err < 0) 1735 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 1736 1737 err = dpcm_be_dai_shutdown(fe, stream); 1738 if (err < 0) 1739 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 1740 1741 /* run the stream event for each BE */ 1742 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 1743 1744 return 0; 1745 } 1746 1747 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 1748 { 1749 struct snd_pcm_substream *substream = 1750 snd_soc_dpcm_get_substream(fe, stream); 1751 struct snd_soc_dpcm *dpcm; 1752 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 1753 int ret; 1754 1755 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 1756 stream ? "capture" : "playback", fe->dai_link->name); 1757 1758 /* Only start the BE if the FE is ready */ 1759 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 1760 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 1761 return -EINVAL; 1762 1763 /* startup must always be called for new BEs */ 1764 ret = dpcm_be_dai_startup(fe, stream); 1765 if (ret < 0) 1766 goto disconnect; 1767 1768 /* keep going if FE state is > open */ 1769 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 1770 return 0; 1771 1772 ret = dpcm_be_dai_hw_params(fe, stream); 1773 if (ret < 0) 1774 goto close; 1775 1776 /* keep going if FE state is > hw_params */ 1777 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 1778 return 0; 1779 1780 1781 ret = dpcm_be_dai_prepare(fe, stream); 1782 if (ret < 0) 1783 goto hw_free; 1784 1785 /* run the stream event for each BE */ 1786 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 1787 1788 /* keep going if FE state is > prepare */ 1789 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 1790 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 1791 return 0; 1792 1793 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 1794 /* call trigger on the frontend - FE takes care of all BE triggers */ 1795 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 1796 fe->dai_link->name); 1797 1798 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 1799 if (ret < 0) { 1800 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 1801 goto hw_free; 1802 } 1803 } else { 1804 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 1805 fe->dai_link->name); 1806 1807 ret = dpcm_be_dai_trigger(fe, stream, 1808 SNDRV_PCM_TRIGGER_START); 1809 if (ret < 0) { 1810 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1811 goto hw_free; 1812 } 1813 } 1814 1815 return 0; 1816 1817 hw_free: 1818 dpcm_be_dai_hw_free(fe, stream); 1819 close: 1820 dpcm_be_dai_shutdown(fe, stream); 1821 disconnect: 1822 /* disconnect any non started BEs */ 1823 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1824 struct snd_soc_pcm_runtime *be = dpcm->be; 1825 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1826 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1827 } 1828 1829 return ret; 1830 } 1831 1832 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 1833 { 1834 int ret; 1835 1836 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1837 ret = dpcm_run_update_startup(fe, stream); 1838 if (ret < 0) 1839 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 1840 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1841 1842 return ret; 1843 } 1844 1845 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 1846 { 1847 int ret; 1848 1849 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1850 ret = dpcm_run_update_shutdown(fe, stream); 1851 if (ret < 0) 1852 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 1853 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1854 1855 return ret; 1856 } 1857 1858 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 1859 * any DAI links. 1860 */ 1861 int soc_dpcm_runtime_update(struct snd_soc_card *card) 1862 { 1863 int i, old, new, paths; 1864 1865 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1866 for (i = 0; i < card->num_rtd; i++) { 1867 struct snd_soc_dapm_widget_list *list; 1868 struct snd_soc_pcm_runtime *fe = &card->rtd[i]; 1869 1870 /* make sure link is FE */ 1871 if (!fe->dai_link->dynamic) 1872 continue; 1873 1874 /* only check active links */ 1875 if (!fe->cpu_dai->active) 1876 continue; 1877 1878 /* DAPM sync will call this to update DSP paths */ 1879 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n", 1880 fe->dai_link->name); 1881 1882 /* skip if FE doesn't have playback capability */ 1883 if (!fe->cpu_dai->driver->playback.channels_min) 1884 goto capture; 1885 1886 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 1887 if (paths < 0) { 1888 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 1889 fe->dai_link->name, "playback"); 1890 mutex_unlock(&card->mutex); 1891 return paths; 1892 } 1893 1894 /* update any new playback paths */ 1895 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1); 1896 if (new) { 1897 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 1898 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 1899 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 1900 } 1901 1902 /* update any old playback paths */ 1903 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0); 1904 if (old) { 1905 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 1906 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 1907 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 1908 } 1909 1910 capture: 1911 /* skip if FE doesn't have capture capability */ 1912 if (!fe->cpu_dai->driver->capture.channels_min) 1913 continue; 1914 1915 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 1916 if (paths < 0) { 1917 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 1918 fe->dai_link->name, "capture"); 1919 mutex_unlock(&card->mutex); 1920 return paths; 1921 } 1922 1923 /* update any new capture paths */ 1924 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1); 1925 if (new) { 1926 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 1927 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 1928 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 1929 } 1930 1931 /* update any old capture paths */ 1932 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0); 1933 if (old) { 1934 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 1935 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 1936 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 1937 } 1938 1939 dpcm_path_put(&list); 1940 } 1941 1942 mutex_unlock(&card->mutex); 1943 return 0; 1944 } 1945 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 1946 { 1947 struct snd_soc_dpcm *dpcm; 1948 struct list_head *clients = 1949 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients; 1950 1951 list_for_each_entry(dpcm, clients, list_be) { 1952 1953 struct snd_soc_pcm_runtime *be = dpcm->be; 1954 struct snd_soc_dai *dai = be->codec_dai; 1955 struct snd_soc_dai_driver *drv = dai->driver; 1956 1957 if (be->dai_link->ignore_suspend) 1958 continue; 1959 1960 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", be->dai_link->name); 1961 1962 if (drv->ops && drv->ops->digital_mute && dai->playback_active) 1963 drv->ops->digital_mute(dai, mute); 1964 } 1965 1966 return 0; 1967 } 1968 1969 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 1970 { 1971 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1972 struct snd_soc_dpcm *dpcm; 1973 struct snd_soc_dapm_widget_list *list; 1974 int ret; 1975 int stream = fe_substream->stream; 1976 1977 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1978 fe->dpcm[stream].runtime = fe_substream->runtime; 1979 1980 if (dpcm_path_get(fe, stream, &list) <= 0) { 1981 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 1982 fe->dai_link->name, stream ? "capture" : "playback"); 1983 } 1984 1985 /* calculate valid and active FE <-> BE dpcms */ 1986 dpcm_process_paths(fe, stream, &list, 1); 1987 1988 ret = dpcm_fe_dai_startup(fe_substream); 1989 if (ret < 0) { 1990 /* clean up all links */ 1991 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 1992 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1993 1994 dpcm_be_disconnect(fe, stream); 1995 fe->dpcm[stream].runtime = NULL; 1996 } 1997 1998 dpcm_clear_pending_state(fe, stream); 1999 dpcm_path_put(&list); 2000 mutex_unlock(&fe->card->mutex); 2001 return ret; 2002 } 2003 2004 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2005 { 2006 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2007 struct snd_soc_dpcm *dpcm; 2008 int stream = fe_substream->stream, ret; 2009 2010 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2011 ret = dpcm_fe_dai_shutdown(fe_substream); 2012 2013 /* mark FE's links ready to prune */ 2014 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2015 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2016 2017 dpcm_be_disconnect(fe, stream); 2018 2019 fe->dpcm[stream].runtime = NULL; 2020 mutex_unlock(&fe->card->mutex); 2021 return ret; 2022 } 2023 2024 /* create a new pcm */ 2025 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2026 { 2027 struct snd_soc_platform *platform = rtd->platform; 2028 struct snd_soc_dai *codec_dai = rtd->codec_dai; 2029 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2030 struct snd_pcm *pcm; 2031 char new_name[64]; 2032 int ret = 0, playback = 0, capture = 0; 2033 2034 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2035 if (cpu_dai->driver->playback.channels_min) 2036 playback = 1; 2037 if (cpu_dai->driver->capture.channels_min) 2038 capture = 1; 2039 } else { 2040 if (codec_dai->driver->playback.channels_min && 2041 cpu_dai->driver->playback.channels_min) 2042 playback = 1; 2043 if (codec_dai->driver->capture.channels_min && 2044 cpu_dai->driver->capture.channels_min) 2045 capture = 1; 2046 } 2047 2048 if (rtd->dai_link->playback_only) { 2049 playback = 1; 2050 capture = 0; 2051 } 2052 2053 if (rtd->dai_link->capture_only) { 2054 playback = 0; 2055 capture = 1; 2056 } 2057 2058 /* create the PCM */ 2059 if (rtd->dai_link->no_pcm) { 2060 snprintf(new_name, sizeof(new_name), "(%s)", 2061 rtd->dai_link->stream_name); 2062 2063 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2064 playback, capture, &pcm); 2065 } else { 2066 if (rtd->dai_link->dynamic) 2067 snprintf(new_name, sizeof(new_name), "%s (*)", 2068 rtd->dai_link->stream_name); 2069 else 2070 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2071 rtd->dai_link->stream_name, codec_dai->name, num); 2072 2073 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2074 capture, &pcm); 2075 } 2076 if (ret < 0) { 2077 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2078 rtd->dai_link->name); 2079 return ret; 2080 } 2081 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2082 2083 /* DAPM dai link stream work */ 2084 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 2085 2086 rtd->pcm = pcm; 2087 pcm->private_data = rtd; 2088 2089 if (rtd->dai_link->no_pcm) { 2090 if (playback) 2091 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2092 if (capture) 2093 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2094 goto out; 2095 } 2096 2097 /* ASoC PCM operations */ 2098 if (rtd->dai_link->dynamic) { 2099 rtd->ops.open = dpcm_fe_dai_open; 2100 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2101 rtd->ops.prepare = dpcm_fe_dai_prepare; 2102 rtd->ops.trigger = dpcm_fe_dai_trigger; 2103 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2104 rtd->ops.close = dpcm_fe_dai_close; 2105 rtd->ops.pointer = soc_pcm_pointer; 2106 rtd->ops.ioctl = soc_pcm_ioctl; 2107 } else { 2108 rtd->ops.open = soc_pcm_open; 2109 rtd->ops.hw_params = soc_pcm_hw_params; 2110 rtd->ops.prepare = soc_pcm_prepare; 2111 rtd->ops.trigger = soc_pcm_trigger; 2112 rtd->ops.hw_free = soc_pcm_hw_free; 2113 rtd->ops.close = soc_pcm_close; 2114 rtd->ops.pointer = soc_pcm_pointer; 2115 rtd->ops.ioctl = soc_pcm_ioctl; 2116 } 2117 2118 if (platform->driver->ops) { 2119 rtd->ops.ack = platform->driver->ops->ack; 2120 rtd->ops.copy = platform->driver->ops->copy; 2121 rtd->ops.silence = platform->driver->ops->silence; 2122 rtd->ops.page = platform->driver->ops->page; 2123 rtd->ops.mmap = platform->driver->ops->mmap; 2124 } 2125 2126 if (playback) 2127 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2128 2129 if (capture) 2130 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2131 2132 if (platform->driver->pcm_new) { 2133 ret = platform->driver->pcm_new(rtd); 2134 if (ret < 0) { 2135 dev_err(platform->dev, 2136 "ASoC: pcm constructor failed: %d\n", 2137 ret); 2138 return ret; 2139 } 2140 } 2141 2142 pcm->private_free = platform->driver->pcm_free; 2143 out: 2144 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", codec_dai->name, 2145 cpu_dai->name); 2146 return ret; 2147 } 2148 2149 /* is the current PCM operation for this FE ? */ 2150 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2151 { 2152 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2153 return 1; 2154 return 0; 2155 } 2156 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2157 2158 /* is the current PCM operation for this BE ? */ 2159 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2160 struct snd_soc_pcm_runtime *be, int stream) 2161 { 2162 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2163 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2164 be->dpcm[stream].runtime_update)) 2165 return 1; 2166 return 0; 2167 } 2168 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2169 2170 /* get the substream for this BE */ 2171 struct snd_pcm_substream * 2172 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2173 { 2174 return be->pcm->streams[stream].substream; 2175 } 2176 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2177 2178 /* get the BE runtime state */ 2179 enum snd_soc_dpcm_state 2180 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 2181 { 2182 return be->dpcm[stream].state; 2183 } 2184 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 2185 2186 /* set the BE runtime state */ 2187 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 2188 int stream, enum snd_soc_dpcm_state state) 2189 { 2190 be->dpcm[stream].state = state; 2191 } 2192 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 2193 2194 /* 2195 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2196 * are not running, paused or suspended for the specified stream direction. 2197 */ 2198 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2199 struct snd_soc_pcm_runtime *be, int stream) 2200 { 2201 struct snd_soc_dpcm *dpcm; 2202 int state; 2203 2204 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2205 2206 if (dpcm->fe == fe) 2207 continue; 2208 2209 state = dpcm->fe->dpcm[stream].state; 2210 if (state == SND_SOC_DPCM_STATE_START || 2211 state == SND_SOC_DPCM_STATE_PAUSED || 2212 state == SND_SOC_DPCM_STATE_SUSPEND) 2213 return 0; 2214 } 2215 2216 /* it's safe to free/stop this BE DAI */ 2217 return 1; 2218 } 2219 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 2220 2221 /* 2222 * We can only change hw params a BE DAI if any of it's FE are not prepared, 2223 * running, paused or suspended for the specified stream direction. 2224 */ 2225 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 2226 struct snd_soc_pcm_runtime *be, int stream) 2227 { 2228 struct snd_soc_dpcm *dpcm; 2229 int state; 2230 2231 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2232 2233 if (dpcm->fe == fe) 2234 continue; 2235 2236 state = dpcm->fe->dpcm[stream].state; 2237 if (state == SND_SOC_DPCM_STATE_START || 2238 state == SND_SOC_DPCM_STATE_PAUSED || 2239 state == SND_SOC_DPCM_STATE_SUSPEND || 2240 state == SND_SOC_DPCM_STATE_PREPARE) 2241 return 0; 2242 } 2243 2244 /* it's safe to change hw_params */ 2245 return 1; 2246 } 2247 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 2248 2249 int snd_soc_platform_trigger(struct snd_pcm_substream *substream, 2250 int cmd, struct snd_soc_platform *platform) 2251 { 2252 if (platform->driver->ops && platform->driver->ops->trigger) 2253 return platform->driver->ops->trigger(substream, cmd); 2254 return 0; 2255 } 2256 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger); 2257 2258 #ifdef CONFIG_DEBUG_FS 2259 static char *dpcm_state_string(enum snd_soc_dpcm_state state) 2260 { 2261 switch (state) { 2262 case SND_SOC_DPCM_STATE_NEW: 2263 return "new"; 2264 case SND_SOC_DPCM_STATE_OPEN: 2265 return "open"; 2266 case SND_SOC_DPCM_STATE_HW_PARAMS: 2267 return "hw_params"; 2268 case SND_SOC_DPCM_STATE_PREPARE: 2269 return "prepare"; 2270 case SND_SOC_DPCM_STATE_START: 2271 return "start"; 2272 case SND_SOC_DPCM_STATE_STOP: 2273 return "stop"; 2274 case SND_SOC_DPCM_STATE_SUSPEND: 2275 return "suspend"; 2276 case SND_SOC_DPCM_STATE_PAUSED: 2277 return "paused"; 2278 case SND_SOC_DPCM_STATE_HW_FREE: 2279 return "hw_free"; 2280 case SND_SOC_DPCM_STATE_CLOSE: 2281 return "close"; 2282 } 2283 2284 return "unknown"; 2285 } 2286 2287 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 2288 int stream, char *buf, size_t size) 2289 { 2290 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 2291 struct snd_soc_dpcm *dpcm; 2292 ssize_t offset = 0; 2293 2294 /* FE state */ 2295 offset += snprintf(buf + offset, size - offset, 2296 "[%s - %s]\n", fe->dai_link->name, 2297 stream ? "Capture" : "Playback"); 2298 2299 offset += snprintf(buf + offset, size - offset, "State: %s\n", 2300 dpcm_state_string(fe->dpcm[stream].state)); 2301 2302 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2303 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2304 offset += snprintf(buf + offset, size - offset, 2305 "Hardware Params: " 2306 "Format = %s, Channels = %d, Rate = %d\n", 2307 snd_pcm_format_name(params_format(params)), 2308 params_channels(params), 2309 params_rate(params)); 2310 2311 /* BEs state */ 2312 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 2313 2314 if (list_empty(&fe->dpcm[stream].be_clients)) { 2315 offset += snprintf(buf + offset, size - offset, 2316 " No active DSP links\n"); 2317 goto out; 2318 } 2319 2320 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2321 struct snd_soc_pcm_runtime *be = dpcm->be; 2322 params = &dpcm->hw_params; 2323 2324 offset += snprintf(buf + offset, size - offset, 2325 "- %s\n", be->dai_link->name); 2326 2327 offset += snprintf(buf + offset, size - offset, 2328 " State: %s\n", 2329 dpcm_state_string(be->dpcm[stream].state)); 2330 2331 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2332 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2333 offset += snprintf(buf + offset, size - offset, 2334 " Hardware Params: " 2335 "Format = %s, Channels = %d, Rate = %d\n", 2336 snd_pcm_format_name(params_format(params)), 2337 params_channels(params), 2338 params_rate(params)); 2339 } 2340 2341 out: 2342 return offset; 2343 } 2344 2345 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 2346 size_t count, loff_t *ppos) 2347 { 2348 struct snd_soc_pcm_runtime *fe = file->private_data; 2349 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 2350 char *buf; 2351 2352 buf = kmalloc(out_count, GFP_KERNEL); 2353 if (!buf) 2354 return -ENOMEM; 2355 2356 if (fe->cpu_dai->driver->playback.channels_min) 2357 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 2358 buf + offset, out_count - offset); 2359 2360 if (fe->cpu_dai->driver->capture.channels_min) 2361 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 2362 buf + offset, out_count - offset); 2363 2364 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 2365 2366 kfree(buf); 2367 return ret; 2368 } 2369 2370 static const struct file_operations dpcm_state_fops = { 2371 .open = simple_open, 2372 .read = dpcm_state_read_file, 2373 .llseek = default_llseek, 2374 }; 2375 2376 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 2377 { 2378 if (!rtd->dai_link) 2379 return 0; 2380 2381 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 2382 rtd->card->debugfs_card_root); 2383 if (!rtd->debugfs_dpcm_root) { 2384 dev_dbg(rtd->dev, 2385 "ASoC: Failed to create dpcm debugfs directory %s\n", 2386 rtd->dai_link->name); 2387 return -EINVAL; 2388 } 2389 2390 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444, 2391 rtd->debugfs_dpcm_root, 2392 rtd, &dpcm_state_fops); 2393 2394 return 0; 2395 } 2396 #endif 2397