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