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