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