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 if (cpu_dai->driver->ops->shutdown) 658 cpu_dai->driver->ops->shutdown(substream, cpu_dai); 659 660 for (i = 0; i < rtd->num_codecs; i++) { 661 codec_dai = rtd->codec_dais[i]; 662 if (codec_dai->driver->ops->shutdown) 663 codec_dai->driver->ops->shutdown(substream, codec_dai); 664 } 665 666 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) 667 rtd->dai_link->ops->shutdown(substream); 668 669 if (platform->driver->ops && platform->driver->ops->close) 670 platform->driver->ops->close(substream); 671 672 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 673 if (snd_soc_runtime_ignore_pmdown_time(rtd)) { 674 /* powered down playback stream now */ 675 snd_soc_dapm_stream_event(rtd, 676 SNDRV_PCM_STREAM_PLAYBACK, 677 SND_SOC_DAPM_STREAM_STOP); 678 } else { 679 /* start delayed pop wq here for playback streams */ 680 rtd->pop_wait = 1; 681 queue_delayed_work(system_power_efficient_wq, 682 &rtd->delayed_work, 683 msecs_to_jiffies(rtd->pmdown_time)); 684 } 685 } else { 686 /* capture streams can be powered down now */ 687 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE, 688 SND_SOC_DAPM_STREAM_STOP); 689 } 690 691 mutex_unlock(&rtd->pcm_mutex); 692 693 pm_runtime_put(platform->dev); 694 for (i = 0; i < rtd->num_codecs; i++) 695 pm_runtime_put(rtd->codec_dais[i]->dev); 696 pm_runtime_put(cpu_dai->dev); 697 for (i = 0; i < rtd->num_codecs; i++) { 698 if (!rtd->codec_dais[i]->active) 699 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev); 700 } 701 if (!cpu_dai->active) 702 pinctrl_pm_select_sleep_state(cpu_dai->dev); 703 704 return 0; 705 } 706 707 /* 708 * Called by ALSA when the PCM substream is prepared, can set format, sample 709 * rate, etc. This function is non atomic and can be called multiple times, 710 * it can refer to the runtime info. 711 */ 712 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 713 { 714 struct snd_soc_pcm_runtime *rtd = substream->private_data; 715 struct snd_soc_platform *platform = rtd->platform; 716 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 717 struct snd_soc_dai *codec_dai; 718 int i, ret = 0; 719 720 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 721 722 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) { 723 ret = rtd->dai_link->ops->prepare(substream); 724 if (ret < 0) { 725 dev_err(rtd->card->dev, "ASoC: machine prepare error:" 726 " %d\n", ret); 727 goto out; 728 } 729 } 730 731 if (platform->driver->ops && platform->driver->ops->prepare) { 732 ret = platform->driver->ops->prepare(substream); 733 if (ret < 0) { 734 dev_err(platform->dev, "ASoC: platform prepare error:" 735 " %d\n", ret); 736 goto out; 737 } 738 } 739 740 for (i = 0; i < rtd->num_codecs; i++) { 741 codec_dai = rtd->codec_dais[i]; 742 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) { 743 ret = codec_dai->driver->ops->prepare(substream, 744 codec_dai); 745 if (ret < 0) { 746 dev_err(codec_dai->dev, 747 "ASoC: DAI prepare error: %d\n", ret); 748 goto out; 749 } 750 } 751 } 752 753 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) { 754 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai); 755 if (ret < 0) { 756 dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n", 757 ret); 758 goto out; 759 } 760 } 761 762 /* cancel any delayed stream shutdown that is pending */ 763 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 764 rtd->pop_wait) { 765 rtd->pop_wait = 0; 766 cancel_delayed_work(&rtd->delayed_work); 767 } 768 769 snd_soc_dapm_stream_event(rtd, substream->stream, 770 SND_SOC_DAPM_STREAM_START); 771 772 for (i = 0; i < rtd->num_codecs; i++) 773 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0, 774 substream->stream); 775 776 out: 777 mutex_unlock(&rtd->pcm_mutex); 778 return ret; 779 } 780 781 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 782 unsigned int mask) 783 { 784 struct snd_interval *interval; 785 int channels = hweight_long(mask); 786 787 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 788 interval->min = channels; 789 interval->max = channels; 790 } 791 792 int soc_dai_hw_params(struct snd_pcm_substream *substream, 793 struct snd_pcm_hw_params *params, 794 struct snd_soc_dai *dai) 795 { 796 int ret; 797 798 if (dai->driver->ops && dai->driver->ops->hw_params) { 799 ret = dai->driver->ops->hw_params(substream, params, dai); 800 if (ret < 0) { 801 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n", 802 dai->name, ret); 803 return ret; 804 } 805 } 806 807 return 0; 808 } 809 810 /* 811 * Called by ALSA when the hardware params are set by application. This 812 * function can also be called multiple times and can allocate buffers 813 * (using snd_pcm_lib_* ). It's non-atomic. 814 */ 815 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 816 struct snd_pcm_hw_params *params) 817 { 818 struct snd_soc_pcm_runtime *rtd = substream->private_data; 819 struct snd_soc_platform *platform = rtd->platform; 820 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 821 int i, ret = 0; 822 823 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 824 825 ret = soc_pcm_params_symmetry(substream, params); 826 if (ret) 827 goto out; 828 829 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) { 830 ret = rtd->dai_link->ops->hw_params(substream, params); 831 if (ret < 0) { 832 dev_err(rtd->card->dev, "ASoC: machine hw_params" 833 " failed: %d\n", ret); 834 goto out; 835 } 836 } 837 838 for (i = 0; i < rtd->num_codecs; i++) { 839 struct snd_soc_dai *codec_dai = rtd->codec_dais[i]; 840 struct snd_pcm_hw_params codec_params; 841 842 /* copy params for each codec */ 843 codec_params = *params; 844 845 /* fixup params based on TDM slot masks */ 846 if (codec_dai->tx_mask) 847 soc_pcm_codec_params_fixup(&codec_params, 848 codec_dai->tx_mask); 849 if (codec_dai->rx_mask) 850 soc_pcm_codec_params_fixup(&codec_params, 851 codec_dai->rx_mask); 852 853 ret = soc_dai_hw_params(substream, &codec_params, codec_dai); 854 if(ret < 0) 855 goto codec_err; 856 857 codec_dai->rate = params_rate(&codec_params); 858 codec_dai->channels = params_channels(&codec_params); 859 codec_dai->sample_bits = snd_pcm_format_physical_width( 860 params_format(&codec_params)); 861 } 862 863 ret = soc_dai_hw_params(substream, params, cpu_dai); 864 if (ret < 0) 865 goto interface_err; 866 867 if (platform->driver->ops && platform->driver->ops->hw_params) { 868 ret = platform->driver->ops->hw_params(substream, params); 869 if (ret < 0) { 870 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n", 871 platform->component.name, ret); 872 goto platform_err; 873 } 874 } 875 876 /* store the parameters for each DAIs */ 877 cpu_dai->rate = params_rate(params); 878 cpu_dai->channels = params_channels(params); 879 cpu_dai->sample_bits = 880 snd_pcm_format_physical_width(params_format(params)); 881 882 out: 883 mutex_unlock(&rtd->pcm_mutex); 884 return ret; 885 886 platform_err: 887 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free) 888 cpu_dai->driver->ops->hw_free(substream, cpu_dai); 889 890 interface_err: 891 i = rtd->num_codecs; 892 893 codec_err: 894 while (--i >= 0) { 895 struct snd_soc_dai *codec_dai = rtd->codec_dais[i]; 896 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free) 897 codec_dai->driver->ops->hw_free(substream, codec_dai); 898 codec_dai->rate = 0; 899 } 900 901 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) 902 rtd->dai_link->ops->hw_free(substream); 903 904 mutex_unlock(&rtd->pcm_mutex); 905 return ret; 906 } 907 908 /* 909 * Frees resources allocated by hw_params, can be called multiple times 910 */ 911 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 912 { 913 struct snd_soc_pcm_runtime *rtd = substream->private_data; 914 struct snd_soc_platform *platform = rtd->platform; 915 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 916 struct snd_soc_dai *codec_dai; 917 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 918 int i; 919 920 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 921 922 /* clear the corresponding DAIs parameters when going to be inactive */ 923 if (cpu_dai->active == 1) { 924 cpu_dai->rate = 0; 925 cpu_dai->channels = 0; 926 cpu_dai->sample_bits = 0; 927 } 928 929 for (i = 0; i < rtd->num_codecs; i++) { 930 codec_dai = rtd->codec_dais[i]; 931 if (codec_dai->active == 1) { 932 codec_dai->rate = 0; 933 codec_dai->channels = 0; 934 codec_dai->sample_bits = 0; 935 } 936 } 937 938 /* apply codec digital mute */ 939 for (i = 0; i < rtd->num_codecs; i++) { 940 if ((playback && rtd->codec_dais[i]->playback_active == 1) || 941 (!playback && rtd->codec_dais[i]->capture_active == 1)) 942 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1, 943 substream->stream); 944 } 945 946 /* free any machine hw params */ 947 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) 948 rtd->dai_link->ops->hw_free(substream); 949 950 /* free any DMA resources */ 951 if (platform->driver->ops && platform->driver->ops->hw_free) 952 platform->driver->ops->hw_free(substream); 953 954 /* now free hw params for the DAIs */ 955 for (i = 0; i < rtd->num_codecs; i++) { 956 codec_dai = rtd->codec_dais[i]; 957 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free) 958 codec_dai->driver->ops->hw_free(substream, codec_dai); 959 } 960 961 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free) 962 cpu_dai->driver->ops->hw_free(substream, cpu_dai); 963 964 mutex_unlock(&rtd->pcm_mutex); 965 return 0; 966 } 967 968 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 969 { 970 struct snd_soc_pcm_runtime *rtd = substream->private_data; 971 struct snd_soc_platform *platform = rtd->platform; 972 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 973 struct snd_soc_dai *codec_dai; 974 int i, ret; 975 976 for (i = 0; i < rtd->num_codecs; i++) { 977 codec_dai = rtd->codec_dais[i]; 978 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) { 979 ret = codec_dai->driver->ops->trigger(substream, 980 cmd, codec_dai); 981 if (ret < 0) 982 return ret; 983 } 984 } 985 986 if (platform->driver->ops && platform->driver->ops->trigger) { 987 ret = platform->driver->ops->trigger(substream, cmd); 988 if (ret < 0) 989 return ret; 990 } 991 992 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) { 993 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai); 994 if (ret < 0) 995 return ret; 996 } 997 998 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) { 999 ret = rtd->dai_link->ops->trigger(substream, cmd); 1000 if (ret < 0) 1001 return ret; 1002 } 1003 1004 return 0; 1005 } 1006 1007 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream, 1008 int cmd) 1009 { 1010 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1011 struct snd_soc_platform *platform = rtd->platform; 1012 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1013 struct snd_soc_dai *codec_dai; 1014 int i, ret; 1015 1016 for (i = 0; i < rtd->num_codecs; i++) { 1017 codec_dai = rtd->codec_dais[i]; 1018 if (codec_dai->driver->ops && 1019 codec_dai->driver->ops->bespoke_trigger) { 1020 ret = codec_dai->driver->ops->bespoke_trigger(substream, 1021 cmd, codec_dai); 1022 if (ret < 0) 1023 return ret; 1024 } 1025 } 1026 1027 if (platform->driver->bespoke_trigger) { 1028 ret = platform->driver->bespoke_trigger(substream, cmd); 1029 if (ret < 0) 1030 return ret; 1031 } 1032 1033 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) { 1034 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai); 1035 if (ret < 0) 1036 return ret; 1037 } 1038 return 0; 1039 } 1040 /* 1041 * soc level wrapper for pointer callback 1042 * If cpu_dai, codec_dai, platform driver has the delay callback, than 1043 * the runtime->delay will be updated accordingly. 1044 */ 1045 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1046 { 1047 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1048 struct snd_soc_platform *platform = rtd->platform; 1049 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1050 struct snd_soc_dai *codec_dai; 1051 struct snd_pcm_runtime *runtime = substream->runtime; 1052 snd_pcm_uframes_t offset = 0; 1053 snd_pcm_sframes_t delay = 0; 1054 snd_pcm_sframes_t codec_delay = 0; 1055 int i; 1056 1057 if (platform->driver->ops && platform->driver->ops->pointer) 1058 offset = platform->driver->ops->pointer(substream); 1059 1060 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay) 1061 delay += cpu_dai->driver->ops->delay(substream, cpu_dai); 1062 1063 for (i = 0; i < rtd->num_codecs; i++) { 1064 codec_dai = rtd->codec_dais[i]; 1065 if (codec_dai->driver->ops && codec_dai->driver->ops->delay) 1066 codec_delay = max(codec_delay, 1067 codec_dai->driver->ops->delay(substream, 1068 codec_dai)); 1069 } 1070 delay += codec_delay; 1071 1072 /* 1073 * None of the existing platform drivers implement delay(), so 1074 * for now the codec_dai of first multicodec entry is used 1075 */ 1076 if (platform->driver->delay) 1077 delay += platform->driver->delay(substream, rtd->codec_dais[0]); 1078 1079 runtime->delay = delay; 1080 1081 return offset; 1082 } 1083 1084 /* connect a FE and BE */ 1085 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1086 struct snd_soc_pcm_runtime *be, int stream) 1087 { 1088 struct snd_soc_dpcm *dpcm; 1089 1090 /* only add new dpcms */ 1091 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1092 if (dpcm->be == be && dpcm->fe == fe) 1093 return 0; 1094 } 1095 1096 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1097 if (!dpcm) 1098 return -ENOMEM; 1099 1100 dpcm->be = be; 1101 dpcm->fe = fe; 1102 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1103 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1104 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1105 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1106 1107 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1108 stream ? "capture" : "playback", fe->dai_link->name, 1109 stream ? "<-" : "->", be->dai_link->name); 1110 1111 #ifdef CONFIG_DEBUG_FS 1112 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644, 1113 fe->debugfs_dpcm_root, &dpcm->state); 1114 #endif 1115 return 1; 1116 } 1117 1118 /* reparent a BE onto another FE */ 1119 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1120 struct snd_soc_pcm_runtime *be, int stream) 1121 { 1122 struct snd_soc_dpcm *dpcm; 1123 struct snd_pcm_substream *fe_substream, *be_substream; 1124 1125 /* reparent if BE is connected to other FEs */ 1126 if (!be->dpcm[stream].users) 1127 return; 1128 1129 be_substream = snd_soc_dpcm_get_substream(be, stream); 1130 1131 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 1132 if (dpcm->fe == fe) 1133 continue; 1134 1135 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1136 stream ? "capture" : "playback", 1137 dpcm->fe->dai_link->name, 1138 stream ? "<-" : "->", dpcm->be->dai_link->name); 1139 1140 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1141 be_substream->runtime = fe_substream->runtime; 1142 break; 1143 } 1144 } 1145 1146 /* disconnect a BE and FE */ 1147 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1148 { 1149 struct snd_soc_dpcm *dpcm, *d; 1150 1151 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) { 1152 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1153 stream ? "capture" : "playback", 1154 dpcm->be->dai_link->name); 1155 1156 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1157 continue; 1158 1159 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1160 stream ? "capture" : "playback", fe->dai_link->name, 1161 stream ? "<-" : "->", dpcm->be->dai_link->name); 1162 1163 /* BEs still alive need new FE */ 1164 dpcm_be_reparent(fe, dpcm->be, stream); 1165 1166 #ifdef CONFIG_DEBUG_FS 1167 debugfs_remove(dpcm->debugfs_state); 1168 #endif 1169 list_del(&dpcm->list_be); 1170 list_del(&dpcm->list_fe); 1171 kfree(dpcm); 1172 } 1173 } 1174 1175 /* get BE for DAI widget and stream */ 1176 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1177 struct snd_soc_dapm_widget *widget, int stream) 1178 { 1179 struct snd_soc_pcm_runtime *be; 1180 int i, j; 1181 1182 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1183 for (i = 0; i < card->num_links; i++) { 1184 be = &card->rtd[i]; 1185 1186 if (!be->dai_link->no_pcm) 1187 continue; 1188 1189 if (be->cpu_dai->playback_widget == widget) 1190 return be; 1191 1192 for (j = 0; j < be->num_codecs; j++) { 1193 struct snd_soc_dai *dai = be->codec_dais[j]; 1194 if (dai->playback_widget == widget) 1195 return be; 1196 } 1197 } 1198 } else { 1199 1200 for (i = 0; i < card->num_links; i++) { 1201 be = &card->rtd[i]; 1202 1203 if (!be->dai_link->no_pcm) 1204 continue; 1205 1206 if (be->cpu_dai->capture_widget == widget) 1207 return be; 1208 1209 for (j = 0; j < be->num_codecs; j++) { 1210 struct snd_soc_dai *dai = be->codec_dais[j]; 1211 if (dai->capture_widget == widget) 1212 return be; 1213 } 1214 } 1215 } 1216 1217 dev_err(card->dev, "ASoC: can't get %s BE for %s\n", 1218 stream ? "capture" : "playback", widget->name); 1219 return NULL; 1220 } 1221 1222 static inline struct snd_soc_dapm_widget * 1223 dai_get_widget(struct snd_soc_dai *dai, int stream) 1224 { 1225 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1226 return dai->playback_widget; 1227 else 1228 return dai->capture_widget; 1229 } 1230 1231 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1232 struct snd_soc_dapm_widget *widget) 1233 { 1234 int i; 1235 1236 for (i = 0; i < list->num_widgets; i++) { 1237 if (widget == list->widgets[i]) 1238 return 1; 1239 } 1240 1241 return 0; 1242 } 1243 1244 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1245 int stream, struct snd_soc_dapm_widget_list **list_) 1246 { 1247 struct snd_soc_dai *cpu_dai = fe->cpu_dai; 1248 struct snd_soc_dapm_widget_list *list; 1249 int paths; 1250 1251 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) + 1252 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL); 1253 if (list == NULL) 1254 return -ENOMEM; 1255 1256 /* get number of valid DAI paths and their widgets */ 1257 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list); 1258 1259 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1260 stream ? "capture" : "playback"); 1261 1262 *list_ = list; 1263 return paths; 1264 } 1265 1266 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1267 struct snd_soc_dapm_widget_list **list_) 1268 { 1269 struct snd_soc_dpcm *dpcm; 1270 struct snd_soc_dapm_widget_list *list = *list_; 1271 struct snd_soc_dapm_widget *widget; 1272 int prune = 0; 1273 1274 /* Destroy any old FE <--> BE connections */ 1275 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1276 unsigned int i; 1277 1278 /* is there a valid CPU DAI widget for this BE */ 1279 widget = dai_get_widget(dpcm->be->cpu_dai, stream); 1280 1281 /* prune the BE if it's no longer in our active list */ 1282 if (widget && widget_in_list(list, widget)) 1283 continue; 1284 1285 /* is there a valid CODEC DAI widget for this BE */ 1286 for (i = 0; i < dpcm->be->num_codecs; i++) { 1287 struct snd_soc_dai *dai = dpcm->be->codec_dais[i]; 1288 widget = dai_get_widget(dai, stream); 1289 1290 /* prune the BE if it's no longer in our active list */ 1291 if (widget && widget_in_list(list, widget)) 1292 continue; 1293 } 1294 1295 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1296 stream ? "capture" : "playback", 1297 dpcm->be->dai_link->name, fe->dai_link->name); 1298 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1299 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1300 prune++; 1301 } 1302 1303 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1304 return prune; 1305 } 1306 1307 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1308 struct snd_soc_dapm_widget_list **list_) 1309 { 1310 struct snd_soc_card *card = fe->card; 1311 struct snd_soc_dapm_widget_list *list = *list_; 1312 struct snd_soc_pcm_runtime *be; 1313 int i, new = 0, err; 1314 1315 /* Create any new FE <--> BE connections */ 1316 for (i = 0; i < list->num_widgets; i++) { 1317 1318 switch (list->widgets[i]->id) { 1319 case snd_soc_dapm_dai_in: 1320 case snd_soc_dapm_dai_out: 1321 break; 1322 default: 1323 continue; 1324 } 1325 1326 /* is there a valid BE rtd for this widget */ 1327 be = dpcm_get_be(card, list->widgets[i], stream); 1328 if (!be) { 1329 dev_err(fe->dev, "ASoC: no BE found for %s\n", 1330 list->widgets[i]->name); 1331 continue; 1332 } 1333 1334 /* make sure BE is a real BE */ 1335 if (!be->dai_link->no_pcm) 1336 continue; 1337 1338 /* don't connect if FE is not running */ 1339 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1340 continue; 1341 1342 /* newly connected FE and BE */ 1343 err = dpcm_be_connect(fe, be, stream); 1344 if (err < 0) { 1345 dev_err(fe->dev, "ASoC: can't connect %s\n", 1346 list->widgets[i]->name); 1347 break; 1348 } else if (err == 0) /* already connected */ 1349 continue; 1350 1351 /* new */ 1352 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1353 new++; 1354 } 1355 1356 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1357 return new; 1358 } 1359 1360 /* 1361 * Find the corresponding BE DAIs that source or sink audio to this 1362 * FE substream. 1363 */ 1364 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1365 int stream, struct snd_soc_dapm_widget_list **list, int new) 1366 { 1367 if (new) 1368 return dpcm_add_paths(fe, stream, list); 1369 else 1370 return dpcm_prune_paths(fe, stream, list); 1371 } 1372 1373 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1374 { 1375 struct snd_soc_dpcm *dpcm; 1376 1377 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 1378 dpcm->be->dpcm[stream].runtime_update = 1379 SND_SOC_DPCM_UPDATE_NO; 1380 } 1381 1382 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1383 int stream) 1384 { 1385 struct snd_soc_dpcm *dpcm; 1386 1387 /* disable any enabled and non active backends */ 1388 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1389 1390 struct snd_soc_pcm_runtime *be = dpcm->be; 1391 struct snd_pcm_substream *be_substream = 1392 snd_soc_dpcm_get_substream(be, stream); 1393 1394 if (be->dpcm[stream].users == 0) 1395 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1396 stream ? "capture" : "playback", 1397 be->dpcm[stream].state); 1398 1399 if (--be->dpcm[stream].users != 0) 1400 continue; 1401 1402 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1403 continue; 1404 1405 soc_pcm_close(be_substream); 1406 be_substream->runtime = NULL; 1407 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1408 } 1409 } 1410 1411 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1412 { 1413 struct snd_soc_dpcm *dpcm; 1414 int err, count = 0; 1415 1416 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1417 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1418 1419 struct snd_soc_pcm_runtime *be = dpcm->be; 1420 struct snd_pcm_substream *be_substream = 1421 snd_soc_dpcm_get_substream(be, stream); 1422 1423 if (!be_substream) { 1424 dev_err(be->dev, "ASoC: no backend %s stream\n", 1425 stream ? "capture" : "playback"); 1426 continue; 1427 } 1428 1429 /* is this op for this BE ? */ 1430 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1431 continue; 1432 1433 /* first time the dpcm is open ? */ 1434 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1435 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1436 stream ? "capture" : "playback", 1437 be->dpcm[stream].state); 1438 1439 if (be->dpcm[stream].users++ != 0) 1440 continue; 1441 1442 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1443 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1444 continue; 1445 1446 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1447 stream ? "capture" : "playback", be->dai_link->name); 1448 1449 be_substream->runtime = be->dpcm[stream].runtime; 1450 err = soc_pcm_open(be_substream); 1451 if (err < 0) { 1452 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1453 be->dpcm[stream].users--; 1454 if (be->dpcm[stream].users < 0) 1455 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1456 stream ? "capture" : "playback", 1457 be->dpcm[stream].state); 1458 1459 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1460 goto unwind; 1461 } 1462 1463 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1464 count++; 1465 } 1466 1467 return count; 1468 1469 unwind: 1470 /* disable any enabled and non active backends */ 1471 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1472 struct snd_soc_pcm_runtime *be = dpcm->be; 1473 struct snd_pcm_substream *be_substream = 1474 snd_soc_dpcm_get_substream(be, stream); 1475 1476 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1477 continue; 1478 1479 if (be->dpcm[stream].users == 0) 1480 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1481 stream ? "capture" : "playback", 1482 be->dpcm[stream].state); 1483 1484 if (--be->dpcm[stream].users != 0) 1485 continue; 1486 1487 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1488 continue; 1489 1490 soc_pcm_close(be_substream); 1491 be_substream->runtime = NULL; 1492 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1493 } 1494 1495 return err; 1496 } 1497 1498 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 1499 struct snd_soc_pcm_stream *stream) 1500 { 1501 runtime->hw.rate_min = stream->rate_min; 1502 runtime->hw.rate_max = stream->rate_max; 1503 runtime->hw.channels_min = stream->channels_min; 1504 runtime->hw.channels_max = stream->channels_max; 1505 if (runtime->hw.formats) 1506 runtime->hw.formats &= stream->formats; 1507 else 1508 runtime->hw.formats = stream->formats; 1509 runtime->hw.rates = stream->rates; 1510 } 1511 1512 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1513 { 1514 struct snd_pcm_runtime *runtime = substream->runtime; 1515 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1516 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1517 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 1518 1519 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1520 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback); 1521 else 1522 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture); 1523 } 1524 1525 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 1526 1527 /* Set FE's runtime_update state; the state is protected via PCM stream lock 1528 * for avoiding the race with trigger callback. 1529 * If the state is unset and a trigger is pending while the previous operation, 1530 * process the pending trigger action here. 1531 */ 1532 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 1533 int stream, enum snd_soc_dpcm_update state) 1534 { 1535 struct snd_pcm_substream *substream = 1536 snd_soc_dpcm_get_substream(fe, stream); 1537 1538 snd_pcm_stream_lock_irq(substream); 1539 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 1540 dpcm_fe_dai_do_trigger(substream, 1541 fe->dpcm[stream].trigger_pending - 1); 1542 fe->dpcm[stream].trigger_pending = 0; 1543 } 1544 fe->dpcm[stream].runtime_update = state; 1545 snd_pcm_stream_unlock_irq(substream); 1546 } 1547 1548 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1549 { 1550 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1551 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1552 int stream = fe_substream->stream, ret = 0; 1553 1554 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1555 1556 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1557 if (ret < 0) { 1558 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1559 goto be_err; 1560 } 1561 1562 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1563 1564 /* start the DAI frontend */ 1565 ret = soc_pcm_open(fe_substream); 1566 if (ret < 0) { 1567 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 1568 goto unwind; 1569 } 1570 1571 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1572 1573 dpcm_set_fe_runtime(fe_substream); 1574 snd_pcm_limit_hw_rates(runtime); 1575 1576 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1577 return 0; 1578 1579 unwind: 1580 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1581 be_err: 1582 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1583 return ret; 1584 } 1585 1586 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1587 { 1588 struct snd_soc_dpcm *dpcm; 1589 1590 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 1591 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1592 1593 struct snd_soc_pcm_runtime *be = dpcm->be; 1594 struct snd_pcm_substream *be_substream = 1595 snd_soc_dpcm_get_substream(be, stream); 1596 1597 /* is this op for this BE ? */ 1598 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1599 continue; 1600 1601 if (be->dpcm[stream].users == 0) 1602 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1603 stream ? "capture" : "playback", 1604 be->dpcm[stream].state); 1605 1606 if (--be->dpcm[stream].users != 0) 1607 continue; 1608 1609 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1610 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) 1611 continue; 1612 1613 dev_dbg(be->dev, "ASoC: close BE %s\n", 1614 dpcm->fe->dai_link->name); 1615 1616 soc_pcm_close(be_substream); 1617 be_substream->runtime = NULL; 1618 1619 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1620 } 1621 return 0; 1622 } 1623 1624 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1625 { 1626 struct snd_soc_pcm_runtime *fe = substream->private_data; 1627 int stream = substream->stream; 1628 1629 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1630 1631 /* shutdown the BEs */ 1632 dpcm_be_dai_shutdown(fe, substream->stream); 1633 1634 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1635 1636 /* now shutdown the frontend */ 1637 soc_pcm_close(substream); 1638 1639 /* run the stream event for each BE */ 1640 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1641 1642 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1643 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1644 return 0; 1645 } 1646 1647 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1648 { 1649 struct snd_soc_dpcm *dpcm; 1650 1651 /* only hw_params backends that are either sinks or sources 1652 * to this frontend DAI */ 1653 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1654 1655 struct snd_soc_pcm_runtime *be = dpcm->be; 1656 struct snd_pcm_substream *be_substream = 1657 snd_soc_dpcm_get_substream(be, stream); 1658 1659 /* is this op for this BE ? */ 1660 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1661 continue; 1662 1663 /* only free hw when no longer used - check all FEs */ 1664 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1665 continue; 1666 1667 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1668 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1669 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1670 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1671 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1672 continue; 1673 1674 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1675 dpcm->fe->dai_link->name); 1676 1677 soc_pcm_hw_free(be_substream); 1678 1679 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1680 } 1681 1682 return 0; 1683 } 1684 1685 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1686 { 1687 struct snd_soc_pcm_runtime *fe = substream->private_data; 1688 int err, stream = substream->stream; 1689 1690 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1691 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1692 1693 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1694 1695 /* call hw_free on the frontend */ 1696 err = soc_pcm_hw_free(substream); 1697 if (err < 0) 1698 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 1699 fe->dai_link->name); 1700 1701 /* only hw_params backends that are either sinks or sources 1702 * to this frontend DAI */ 1703 err = dpcm_be_dai_hw_free(fe, stream); 1704 1705 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1706 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1707 1708 mutex_unlock(&fe->card->mutex); 1709 return 0; 1710 } 1711 1712 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1713 { 1714 struct snd_soc_dpcm *dpcm; 1715 int ret; 1716 1717 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1718 1719 struct snd_soc_pcm_runtime *be = dpcm->be; 1720 struct snd_pcm_substream *be_substream = 1721 snd_soc_dpcm_get_substream(be, stream); 1722 1723 /* is this op for this BE ? */ 1724 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1725 continue; 1726 1727 /* only allow hw_params() if no connected FEs are running */ 1728 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 1729 continue; 1730 1731 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1732 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1733 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 1734 continue; 1735 1736 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 1737 dpcm->fe->dai_link->name); 1738 1739 /* copy params for each dpcm */ 1740 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1741 sizeof(struct snd_pcm_hw_params)); 1742 1743 /* perform any hw_params fixups */ 1744 if (be->dai_link->be_hw_params_fixup) { 1745 ret = be->dai_link->be_hw_params_fixup(be, 1746 &dpcm->hw_params); 1747 if (ret < 0) { 1748 dev_err(be->dev, 1749 "ASoC: hw_params BE fixup failed %d\n", 1750 ret); 1751 goto unwind; 1752 } 1753 } 1754 1755 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 1756 if (ret < 0) { 1757 dev_err(dpcm->be->dev, 1758 "ASoC: hw_params BE failed %d\n", ret); 1759 goto unwind; 1760 } 1761 1762 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1763 } 1764 return 0; 1765 1766 unwind: 1767 /* disable any enabled and non active backends */ 1768 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1769 struct snd_soc_pcm_runtime *be = dpcm->be; 1770 struct snd_pcm_substream *be_substream = 1771 snd_soc_dpcm_get_substream(be, stream); 1772 1773 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1774 continue; 1775 1776 /* only allow hw_free() if no connected FEs are running */ 1777 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1778 continue; 1779 1780 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1781 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1782 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1783 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1784 continue; 1785 1786 soc_pcm_hw_free(be_substream); 1787 } 1788 1789 return ret; 1790 } 1791 1792 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 1793 struct snd_pcm_hw_params *params) 1794 { 1795 struct snd_soc_pcm_runtime *fe = substream->private_data; 1796 int ret, stream = substream->stream; 1797 1798 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1799 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1800 1801 memcpy(&fe->dpcm[substream->stream].hw_params, params, 1802 sizeof(struct snd_pcm_hw_params)); 1803 ret = dpcm_be_dai_hw_params(fe, substream->stream); 1804 if (ret < 0) { 1805 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 1806 goto out; 1807 } 1808 1809 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 1810 fe->dai_link->name, params_rate(params), 1811 params_channels(params), params_format(params)); 1812 1813 /* call hw_params on the frontend */ 1814 ret = soc_pcm_hw_params(substream, params); 1815 if (ret < 0) { 1816 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 1817 dpcm_be_dai_hw_free(fe, stream); 1818 } else 1819 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1820 1821 out: 1822 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1823 mutex_unlock(&fe->card->mutex); 1824 return ret; 1825 } 1826 1827 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 1828 struct snd_pcm_substream *substream, int cmd) 1829 { 1830 int ret; 1831 1832 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 1833 dpcm->fe->dai_link->name, cmd); 1834 1835 ret = soc_pcm_trigger(substream, cmd); 1836 if (ret < 0) 1837 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 1838 1839 return ret; 1840 } 1841 1842 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 1843 int cmd) 1844 { 1845 struct snd_soc_dpcm *dpcm; 1846 int ret = 0; 1847 1848 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1849 1850 struct snd_soc_pcm_runtime *be = dpcm->be; 1851 struct snd_pcm_substream *be_substream = 1852 snd_soc_dpcm_get_substream(be, stream); 1853 1854 /* is this op for this BE ? */ 1855 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1856 continue; 1857 1858 switch (cmd) { 1859 case SNDRV_PCM_TRIGGER_START: 1860 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1861 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1862 continue; 1863 1864 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1865 if (ret) 1866 return ret; 1867 1868 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1869 break; 1870 case SNDRV_PCM_TRIGGER_RESUME: 1871 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1872 continue; 1873 1874 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1875 if (ret) 1876 return ret; 1877 1878 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1879 break; 1880 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1881 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 1882 continue; 1883 1884 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1885 if (ret) 1886 return ret; 1887 1888 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1889 break; 1890 case SNDRV_PCM_TRIGGER_STOP: 1891 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1892 continue; 1893 1894 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1895 continue; 1896 1897 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1898 if (ret) 1899 return ret; 1900 1901 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 1902 break; 1903 case SNDRV_PCM_TRIGGER_SUSPEND: 1904 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1905 continue; 1906 1907 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1908 continue; 1909 1910 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1911 if (ret) 1912 return ret; 1913 1914 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 1915 break; 1916 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1917 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1918 continue; 1919 1920 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1921 continue; 1922 1923 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1924 if (ret) 1925 return ret; 1926 1927 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 1928 break; 1929 } 1930 } 1931 1932 return ret; 1933 } 1934 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 1935 1936 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 1937 { 1938 struct snd_soc_pcm_runtime *fe = substream->private_data; 1939 int stream = substream->stream, ret; 1940 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 1941 1942 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1943 1944 switch (trigger) { 1945 case SND_SOC_DPCM_TRIGGER_PRE: 1946 /* call trigger on the frontend before the backend. */ 1947 1948 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 1949 fe->dai_link->name, cmd); 1950 1951 ret = soc_pcm_trigger(substream, cmd); 1952 if (ret < 0) { 1953 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1954 goto out; 1955 } 1956 1957 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1958 break; 1959 case SND_SOC_DPCM_TRIGGER_POST: 1960 /* call trigger on the frontend after the backend. */ 1961 1962 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1963 if (ret < 0) { 1964 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1965 goto out; 1966 } 1967 1968 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 1969 fe->dai_link->name, cmd); 1970 1971 ret = soc_pcm_trigger(substream, cmd); 1972 break; 1973 case SND_SOC_DPCM_TRIGGER_BESPOKE: 1974 /* bespoke trigger() - handles both FE and BEs */ 1975 1976 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 1977 fe->dai_link->name, cmd); 1978 1979 ret = soc_pcm_bespoke_trigger(substream, cmd); 1980 if (ret < 0) { 1981 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1982 goto out; 1983 } 1984 break; 1985 default: 1986 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 1987 fe->dai_link->name); 1988 ret = -EINVAL; 1989 goto out; 1990 } 1991 1992 switch (cmd) { 1993 case SNDRV_PCM_TRIGGER_START: 1994 case SNDRV_PCM_TRIGGER_RESUME: 1995 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1996 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1997 break; 1998 case SNDRV_PCM_TRIGGER_STOP: 1999 case SNDRV_PCM_TRIGGER_SUSPEND: 2000 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2001 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2002 break; 2003 } 2004 2005 out: 2006 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2007 return ret; 2008 } 2009 2010 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2011 { 2012 struct snd_soc_pcm_runtime *fe = substream->private_data; 2013 int stream = substream->stream; 2014 2015 /* if FE's runtime_update is already set, we're in race; 2016 * process this trigger later at exit 2017 */ 2018 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2019 fe->dpcm[stream].trigger_pending = cmd + 1; 2020 return 0; /* delayed, assuming it's successful */ 2021 } 2022 2023 /* we're alone, let's trigger */ 2024 return dpcm_fe_dai_do_trigger(substream, cmd); 2025 } 2026 2027 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2028 { 2029 struct snd_soc_dpcm *dpcm; 2030 int ret = 0; 2031 2032 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2033 2034 struct snd_soc_pcm_runtime *be = dpcm->be; 2035 struct snd_pcm_substream *be_substream = 2036 snd_soc_dpcm_get_substream(be, stream); 2037 2038 /* is this op for this BE ? */ 2039 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2040 continue; 2041 2042 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2044 continue; 2045 2046 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2047 dpcm->fe->dai_link->name); 2048 2049 ret = soc_pcm_prepare(be_substream); 2050 if (ret < 0) { 2051 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2052 ret); 2053 break; 2054 } 2055 2056 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2057 } 2058 return ret; 2059 } 2060 2061 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2062 { 2063 struct snd_soc_pcm_runtime *fe = substream->private_data; 2064 int stream = substream->stream, ret = 0; 2065 2066 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2067 2068 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2069 2070 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2071 2072 /* there is no point preparing this FE if there are no BEs */ 2073 if (list_empty(&fe->dpcm[stream].be_clients)) { 2074 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2075 fe->dai_link->name); 2076 ret = -EINVAL; 2077 goto out; 2078 } 2079 2080 ret = dpcm_be_dai_prepare(fe, substream->stream); 2081 if (ret < 0) 2082 goto out; 2083 2084 /* call prepare on the frontend */ 2085 ret = soc_pcm_prepare(substream); 2086 if (ret < 0) { 2087 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2088 fe->dai_link->name); 2089 goto out; 2090 } 2091 2092 /* run the stream event for each BE */ 2093 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2094 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2095 2096 out: 2097 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2098 mutex_unlock(&fe->card->mutex); 2099 2100 return ret; 2101 } 2102 2103 static int soc_pcm_ioctl(struct snd_pcm_substream *substream, 2104 unsigned int cmd, void *arg) 2105 { 2106 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2107 struct snd_soc_platform *platform = rtd->platform; 2108 2109 if (platform->driver->ops && platform->driver->ops->ioctl) 2110 return platform->driver->ops->ioctl(substream, cmd, arg); 2111 return snd_pcm_lib_ioctl(substream, cmd, arg); 2112 } 2113 2114 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2115 { 2116 struct snd_pcm_substream *substream = 2117 snd_soc_dpcm_get_substream(fe, stream); 2118 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2119 int err; 2120 2121 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2122 stream ? "capture" : "playback", fe->dai_link->name); 2123 2124 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2125 /* call bespoke trigger - FE takes care of all BE triggers */ 2126 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2127 fe->dai_link->name); 2128 2129 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2130 if (err < 0) 2131 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2132 } else { 2133 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2134 fe->dai_link->name); 2135 2136 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2137 if (err < 0) 2138 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2139 } 2140 2141 err = dpcm_be_dai_hw_free(fe, stream); 2142 if (err < 0) 2143 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2144 2145 err = dpcm_be_dai_shutdown(fe, stream); 2146 if (err < 0) 2147 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2148 2149 /* run the stream event for each BE */ 2150 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2151 2152 return 0; 2153 } 2154 2155 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2156 { 2157 struct snd_pcm_substream *substream = 2158 snd_soc_dpcm_get_substream(fe, stream); 2159 struct snd_soc_dpcm *dpcm; 2160 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2161 int ret; 2162 2163 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2164 stream ? "capture" : "playback", fe->dai_link->name); 2165 2166 /* Only start the BE if the FE is ready */ 2167 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2168 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2169 return -EINVAL; 2170 2171 /* startup must always be called for new BEs */ 2172 ret = dpcm_be_dai_startup(fe, stream); 2173 if (ret < 0) 2174 goto disconnect; 2175 2176 /* keep going if FE state is > open */ 2177 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2178 return 0; 2179 2180 ret = dpcm_be_dai_hw_params(fe, stream); 2181 if (ret < 0) 2182 goto close; 2183 2184 /* keep going if FE state is > hw_params */ 2185 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2186 return 0; 2187 2188 2189 ret = dpcm_be_dai_prepare(fe, stream); 2190 if (ret < 0) 2191 goto hw_free; 2192 2193 /* run the stream event for each BE */ 2194 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2195 2196 /* keep going if FE state is > prepare */ 2197 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2198 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2199 return 0; 2200 2201 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2202 /* call trigger on the frontend - FE takes care of all BE triggers */ 2203 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2204 fe->dai_link->name); 2205 2206 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2207 if (ret < 0) { 2208 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2209 goto hw_free; 2210 } 2211 } else { 2212 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2213 fe->dai_link->name); 2214 2215 ret = dpcm_be_dai_trigger(fe, stream, 2216 SNDRV_PCM_TRIGGER_START); 2217 if (ret < 0) { 2218 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2219 goto hw_free; 2220 } 2221 } 2222 2223 return 0; 2224 2225 hw_free: 2226 dpcm_be_dai_hw_free(fe, stream); 2227 close: 2228 dpcm_be_dai_shutdown(fe, stream); 2229 disconnect: 2230 /* disconnect any non started BEs */ 2231 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2232 struct snd_soc_pcm_runtime *be = dpcm->be; 2233 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2234 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2235 } 2236 2237 return ret; 2238 } 2239 2240 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2241 { 2242 int ret; 2243 2244 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2245 ret = dpcm_run_update_startup(fe, stream); 2246 if (ret < 0) 2247 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2248 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2249 2250 return ret; 2251 } 2252 2253 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2254 { 2255 int ret; 2256 2257 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2258 ret = dpcm_run_update_shutdown(fe, stream); 2259 if (ret < 0) 2260 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2261 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2262 2263 return ret; 2264 } 2265 2266 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2267 * any DAI links. 2268 */ 2269 int soc_dpcm_runtime_update(struct snd_soc_card *card) 2270 { 2271 int i, old, new, paths; 2272 2273 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2274 for (i = 0; i < card->num_rtd; i++) { 2275 struct snd_soc_dapm_widget_list *list; 2276 struct snd_soc_pcm_runtime *fe = &card->rtd[i]; 2277 2278 /* make sure link is FE */ 2279 if (!fe->dai_link->dynamic) 2280 continue; 2281 2282 /* only check active links */ 2283 if (!fe->cpu_dai->active) 2284 continue; 2285 2286 /* DAPM sync will call this to update DSP paths */ 2287 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n", 2288 fe->dai_link->name); 2289 2290 /* skip if FE doesn't have playback capability */ 2291 if (!fe->cpu_dai->driver->playback.channels_min) 2292 goto capture; 2293 2294 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2295 if (paths < 0) { 2296 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2297 fe->dai_link->name, "playback"); 2298 mutex_unlock(&card->mutex); 2299 return paths; 2300 } 2301 2302 /* update any new playback paths */ 2303 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1); 2304 if (new) { 2305 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2306 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2307 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2308 } 2309 2310 /* update any old playback paths */ 2311 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0); 2312 if (old) { 2313 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2314 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2315 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2316 } 2317 2318 dpcm_path_put(&list); 2319 capture: 2320 /* skip if FE doesn't have capture capability */ 2321 if (!fe->cpu_dai->driver->capture.channels_min) 2322 continue; 2323 2324 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2325 if (paths < 0) { 2326 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2327 fe->dai_link->name, "capture"); 2328 mutex_unlock(&card->mutex); 2329 return paths; 2330 } 2331 2332 /* update any new capture paths */ 2333 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1); 2334 if (new) { 2335 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2336 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2337 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2338 } 2339 2340 /* update any old capture paths */ 2341 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0); 2342 if (old) { 2343 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2344 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2345 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2346 } 2347 2348 dpcm_path_put(&list); 2349 } 2350 2351 mutex_unlock(&card->mutex); 2352 return 0; 2353 } 2354 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2355 { 2356 struct snd_soc_dpcm *dpcm; 2357 struct list_head *clients = 2358 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients; 2359 2360 list_for_each_entry(dpcm, clients, list_be) { 2361 2362 struct snd_soc_pcm_runtime *be = dpcm->be; 2363 int i; 2364 2365 if (be->dai_link->ignore_suspend) 2366 continue; 2367 2368 for (i = 0; i < be->num_codecs; i++) { 2369 struct snd_soc_dai *dai = be->codec_dais[i]; 2370 struct snd_soc_dai_driver *drv = dai->driver; 2371 2372 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2373 be->dai_link->name); 2374 2375 if (drv->ops && drv->ops->digital_mute && 2376 dai->playback_active) 2377 drv->ops->digital_mute(dai, mute); 2378 } 2379 } 2380 2381 return 0; 2382 } 2383 2384 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2385 { 2386 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2387 struct snd_soc_dpcm *dpcm; 2388 struct snd_soc_dapm_widget_list *list; 2389 int ret; 2390 int stream = fe_substream->stream; 2391 2392 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2393 fe->dpcm[stream].runtime = fe_substream->runtime; 2394 2395 ret = dpcm_path_get(fe, stream, &list); 2396 if (ret < 0) { 2397 mutex_unlock(&fe->card->mutex); 2398 return ret; 2399 } else if (ret == 0) { 2400 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2401 fe->dai_link->name, stream ? "capture" : "playback"); 2402 } 2403 2404 /* calculate valid and active FE <-> BE dpcms */ 2405 dpcm_process_paths(fe, stream, &list, 1); 2406 2407 ret = dpcm_fe_dai_startup(fe_substream); 2408 if (ret < 0) { 2409 /* clean up all links */ 2410 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2411 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2412 2413 dpcm_be_disconnect(fe, stream); 2414 fe->dpcm[stream].runtime = NULL; 2415 } 2416 2417 dpcm_clear_pending_state(fe, stream); 2418 dpcm_path_put(&list); 2419 mutex_unlock(&fe->card->mutex); 2420 return ret; 2421 } 2422 2423 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2424 { 2425 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2426 struct snd_soc_dpcm *dpcm; 2427 int stream = fe_substream->stream, ret; 2428 2429 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2430 ret = dpcm_fe_dai_shutdown(fe_substream); 2431 2432 /* mark FE's links ready to prune */ 2433 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2434 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2435 2436 dpcm_be_disconnect(fe, stream); 2437 2438 fe->dpcm[stream].runtime = NULL; 2439 mutex_unlock(&fe->card->mutex); 2440 return ret; 2441 } 2442 2443 /* create a new pcm */ 2444 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2445 { 2446 struct snd_soc_platform *platform = rtd->platform; 2447 struct snd_soc_dai *codec_dai; 2448 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2449 struct snd_pcm *pcm; 2450 char new_name[64]; 2451 int ret = 0, playback = 0, capture = 0; 2452 int i; 2453 2454 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2455 playback = rtd->dai_link->dpcm_playback; 2456 capture = rtd->dai_link->dpcm_capture; 2457 } else { 2458 for (i = 0; i < rtd->num_codecs; i++) { 2459 codec_dai = rtd->codec_dais[i]; 2460 if (codec_dai->driver->playback.channels_min) 2461 playback = 1; 2462 if (codec_dai->driver->capture.channels_min) 2463 capture = 1; 2464 } 2465 2466 capture = capture && cpu_dai->driver->capture.channels_min; 2467 playback = playback && cpu_dai->driver->playback.channels_min; 2468 } 2469 2470 if (rtd->dai_link->playback_only) { 2471 playback = 1; 2472 capture = 0; 2473 } 2474 2475 if (rtd->dai_link->capture_only) { 2476 playback = 0; 2477 capture = 1; 2478 } 2479 2480 /* create the PCM */ 2481 if (rtd->dai_link->no_pcm) { 2482 snprintf(new_name, sizeof(new_name), "(%s)", 2483 rtd->dai_link->stream_name); 2484 2485 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2486 playback, capture, &pcm); 2487 } else { 2488 if (rtd->dai_link->dynamic) 2489 snprintf(new_name, sizeof(new_name), "%s (*)", 2490 rtd->dai_link->stream_name); 2491 else 2492 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2493 rtd->dai_link->stream_name, 2494 (rtd->num_codecs > 1) ? 2495 "multicodec" : rtd->codec_dai->name, num); 2496 2497 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2498 capture, &pcm); 2499 } 2500 if (ret < 0) { 2501 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2502 rtd->dai_link->name); 2503 return ret; 2504 } 2505 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2506 2507 /* DAPM dai link stream work */ 2508 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 2509 2510 rtd->pcm = pcm; 2511 pcm->private_data = rtd; 2512 2513 if (rtd->dai_link->no_pcm) { 2514 if (playback) 2515 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2516 if (capture) 2517 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2518 goto out; 2519 } 2520 2521 /* ASoC PCM operations */ 2522 if (rtd->dai_link->dynamic) { 2523 rtd->ops.open = dpcm_fe_dai_open; 2524 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2525 rtd->ops.prepare = dpcm_fe_dai_prepare; 2526 rtd->ops.trigger = dpcm_fe_dai_trigger; 2527 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2528 rtd->ops.close = dpcm_fe_dai_close; 2529 rtd->ops.pointer = soc_pcm_pointer; 2530 rtd->ops.ioctl = soc_pcm_ioctl; 2531 } else { 2532 rtd->ops.open = soc_pcm_open; 2533 rtd->ops.hw_params = soc_pcm_hw_params; 2534 rtd->ops.prepare = soc_pcm_prepare; 2535 rtd->ops.trigger = soc_pcm_trigger; 2536 rtd->ops.hw_free = soc_pcm_hw_free; 2537 rtd->ops.close = soc_pcm_close; 2538 rtd->ops.pointer = soc_pcm_pointer; 2539 rtd->ops.ioctl = soc_pcm_ioctl; 2540 } 2541 2542 if (platform->driver->ops) { 2543 rtd->ops.ack = platform->driver->ops->ack; 2544 rtd->ops.copy = platform->driver->ops->copy; 2545 rtd->ops.silence = platform->driver->ops->silence; 2546 rtd->ops.page = platform->driver->ops->page; 2547 rtd->ops.mmap = platform->driver->ops->mmap; 2548 } 2549 2550 if (playback) 2551 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2552 2553 if (capture) 2554 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2555 2556 if (platform->driver->pcm_new) { 2557 ret = platform->driver->pcm_new(rtd); 2558 if (ret < 0) { 2559 dev_err(platform->dev, 2560 "ASoC: pcm constructor failed: %d\n", 2561 ret); 2562 return ret; 2563 } 2564 } 2565 2566 pcm->private_free = platform->driver->pcm_free; 2567 out: 2568 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 2569 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 2570 cpu_dai->name); 2571 return ret; 2572 } 2573 2574 /* is the current PCM operation for this FE ? */ 2575 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2576 { 2577 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2578 return 1; 2579 return 0; 2580 } 2581 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2582 2583 /* is the current PCM operation for this BE ? */ 2584 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2585 struct snd_soc_pcm_runtime *be, int stream) 2586 { 2587 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2588 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2589 be->dpcm[stream].runtime_update)) 2590 return 1; 2591 return 0; 2592 } 2593 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2594 2595 /* get the substream for this BE */ 2596 struct snd_pcm_substream * 2597 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2598 { 2599 return be->pcm->streams[stream].substream; 2600 } 2601 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2602 2603 /* get the BE runtime state */ 2604 enum snd_soc_dpcm_state 2605 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 2606 { 2607 return be->dpcm[stream].state; 2608 } 2609 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 2610 2611 /* set the BE runtime state */ 2612 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 2613 int stream, enum snd_soc_dpcm_state state) 2614 { 2615 be->dpcm[stream].state = state; 2616 } 2617 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 2618 2619 /* 2620 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2621 * are not running, paused or suspended for the specified stream direction. 2622 */ 2623 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2624 struct snd_soc_pcm_runtime *be, int stream) 2625 { 2626 struct snd_soc_dpcm *dpcm; 2627 int state; 2628 2629 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2630 2631 if (dpcm->fe == fe) 2632 continue; 2633 2634 state = dpcm->fe->dpcm[stream].state; 2635 if (state == SND_SOC_DPCM_STATE_START || 2636 state == SND_SOC_DPCM_STATE_PAUSED || 2637 state == SND_SOC_DPCM_STATE_SUSPEND) 2638 return 0; 2639 } 2640 2641 /* it's safe to free/stop this BE DAI */ 2642 return 1; 2643 } 2644 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 2645 2646 /* 2647 * We can only change hw params a BE DAI if any of it's FE are not prepared, 2648 * running, paused or suspended for the specified stream direction. 2649 */ 2650 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 2651 struct snd_soc_pcm_runtime *be, int stream) 2652 { 2653 struct snd_soc_dpcm *dpcm; 2654 int state; 2655 2656 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2657 2658 if (dpcm->fe == fe) 2659 continue; 2660 2661 state = dpcm->fe->dpcm[stream].state; 2662 if (state == SND_SOC_DPCM_STATE_START || 2663 state == SND_SOC_DPCM_STATE_PAUSED || 2664 state == SND_SOC_DPCM_STATE_SUSPEND || 2665 state == SND_SOC_DPCM_STATE_PREPARE) 2666 return 0; 2667 } 2668 2669 /* it's safe to change hw_params */ 2670 return 1; 2671 } 2672 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 2673 2674 int snd_soc_platform_trigger(struct snd_pcm_substream *substream, 2675 int cmd, struct snd_soc_platform *platform) 2676 { 2677 if (platform->driver->ops && platform->driver->ops->trigger) 2678 return platform->driver->ops->trigger(substream, cmd); 2679 return 0; 2680 } 2681 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger); 2682 2683 #ifdef CONFIG_DEBUG_FS 2684 static char *dpcm_state_string(enum snd_soc_dpcm_state state) 2685 { 2686 switch (state) { 2687 case SND_SOC_DPCM_STATE_NEW: 2688 return "new"; 2689 case SND_SOC_DPCM_STATE_OPEN: 2690 return "open"; 2691 case SND_SOC_DPCM_STATE_HW_PARAMS: 2692 return "hw_params"; 2693 case SND_SOC_DPCM_STATE_PREPARE: 2694 return "prepare"; 2695 case SND_SOC_DPCM_STATE_START: 2696 return "start"; 2697 case SND_SOC_DPCM_STATE_STOP: 2698 return "stop"; 2699 case SND_SOC_DPCM_STATE_SUSPEND: 2700 return "suspend"; 2701 case SND_SOC_DPCM_STATE_PAUSED: 2702 return "paused"; 2703 case SND_SOC_DPCM_STATE_HW_FREE: 2704 return "hw_free"; 2705 case SND_SOC_DPCM_STATE_CLOSE: 2706 return "close"; 2707 } 2708 2709 return "unknown"; 2710 } 2711 2712 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 2713 int stream, char *buf, size_t size) 2714 { 2715 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 2716 struct snd_soc_dpcm *dpcm; 2717 ssize_t offset = 0; 2718 2719 /* FE state */ 2720 offset += snprintf(buf + offset, size - offset, 2721 "[%s - %s]\n", fe->dai_link->name, 2722 stream ? "Capture" : "Playback"); 2723 2724 offset += snprintf(buf + offset, size - offset, "State: %s\n", 2725 dpcm_state_string(fe->dpcm[stream].state)); 2726 2727 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2728 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2729 offset += snprintf(buf + offset, size - offset, 2730 "Hardware Params: " 2731 "Format = %s, Channels = %d, Rate = %d\n", 2732 snd_pcm_format_name(params_format(params)), 2733 params_channels(params), 2734 params_rate(params)); 2735 2736 /* BEs state */ 2737 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 2738 2739 if (list_empty(&fe->dpcm[stream].be_clients)) { 2740 offset += snprintf(buf + offset, size - offset, 2741 " No active DSP links\n"); 2742 goto out; 2743 } 2744 2745 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2746 struct snd_soc_pcm_runtime *be = dpcm->be; 2747 params = &dpcm->hw_params; 2748 2749 offset += snprintf(buf + offset, size - offset, 2750 "- %s\n", be->dai_link->name); 2751 2752 offset += snprintf(buf + offset, size - offset, 2753 " State: %s\n", 2754 dpcm_state_string(be->dpcm[stream].state)); 2755 2756 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2757 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2758 offset += snprintf(buf + offset, size - offset, 2759 " Hardware Params: " 2760 "Format = %s, Channels = %d, Rate = %d\n", 2761 snd_pcm_format_name(params_format(params)), 2762 params_channels(params), 2763 params_rate(params)); 2764 } 2765 2766 out: 2767 return offset; 2768 } 2769 2770 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 2771 size_t count, loff_t *ppos) 2772 { 2773 struct snd_soc_pcm_runtime *fe = file->private_data; 2774 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 2775 char *buf; 2776 2777 buf = kmalloc(out_count, GFP_KERNEL); 2778 if (!buf) 2779 return -ENOMEM; 2780 2781 if (fe->cpu_dai->driver->playback.channels_min) 2782 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 2783 buf + offset, out_count - offset); 2784 2785 if (fe->cpu_dai->driver->capture.channels_min) 2786 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 2787 buf + offset, out_count - offset); 2788 2789 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 2790 2791 kfree(buf); 2792 return ret; 2793 } 2794 2795 static const struct file_operations dpcm_state_fops = { 2796 .open = simple_open, 2797 .read = dpcm_state_read_file, 2798 .llseek = default_llseek, 2799 }; 2800 2801 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 2802 { 2803 if (!rtd->dai_link) 2804 return 0; 2805 2806 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 2807 rtd->card->debugfs_card_root); 2808 if (!rtd->debugfs_dpcm_root) { 2809 dev_dbg(rtd->dev, 2810 "ASoC: Failed to create dpcm debugfs directory %s\n", 2811 rtd->dai_link->name); 2812 return -EINVAL; 2813 } 2814 2815 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444, 2816 rtd->debugfs_dpcm_root, 2817 rtd, &dpcm_state_fops); 2818 2819 return 0; 2820 } 2821 #endif 2822