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_startup(struct snd_pcm_substream *fe_substream) 1526 { 1527 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1528 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1529 int stream = fe_substream->stream, ret = 0; 1530 1531 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1532 1533 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1534 if (ret < 0) { 1535 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1536 goto be_err; 1537 } 1538 1539 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1540 1541 /* start the DAI frontend */ 1542 ret = soc_pcm_open(fe_substream); 1543 if (ret < 0) { 1544 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 1545 goto unwind; 1546 } 1547 1548 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1549 1550 dpcm_set_fe_runtime(fe_substream); 1551 snd_pcm_limit_hw_rates(runtime); 1552 1553 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1554 return 0; 1555 1556 unwind: 1557 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1558 be_err: 1559 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1560 return ret; 1561 } 1562 1563 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1564 { 1565 struct snd_soc_dpcm *dpcm; 1566 1567 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 1568 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1569 1570 struct snd_soc_pcm_runtime *be = dpcm->be; 1571 struct snd_pcm_substream *be_substream = 1572 snd_soc_dpcm_get_substream(be, stream); 1573 1574 /* is this op for this BE ? */ 1575 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1576 continue; 1577 1578 if (be->dpcm[stream].users == 0) 1579 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1580 stream ? "capture" : "playback", 1581 be->dpcm[stream].state); 1582 1583 if (--be->dpcm[stream].users != 0) 1584 continue; 1585 1586 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1587 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) 1588 continue; 1589 1590 dev_dbg(be->dev, "ASoC: close BE %s\n", 1591 dpcm->fe->dai_link->name); 1592 1593 soc_pcm_close(be_substream); 1594 be_substream->runtime = NULL; 1595 1596 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1597 } 1598 return 0; 1599 } 1600 1601 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1602 { 1603 struct snd_soc_pcm_runtime *fe = substream->private_data; 1604 int stream = substream->stream; 1605 1606 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1607 1608 /* shutdown the BEs */ 1609 dpcm_be_dai_shutdown(fe, substream->stream); 1610 1611 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1612 1613 /* now shutdown the frontend */ 1614 soc_pcm_close(substream); 1615 1616 /* run the stream event for each BE */ 1617 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1618 1619 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1620 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1621 return 0; 1622 } 1623 1624 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1625 { 1626 struct snd_soc_dpcm *dpcm; 1627 1628 /* only hw_params backends that are either sinks or sources 1629 * to this frontend DAI */ 1630 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1631 1632 struct snd_soc_pcm_runtime *be = dpcm->be; 1633 struct snd_pcm_substream *be_substream = 1634 snd_soc_dpcm_get_substream(be, stream); 1635 1636 /* is this op for this BE ? */ 1637 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1638 continue; 1639 1640 /* only free hw when no longer used - check all FEs */ 1641 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1642 continue; 1643 1644 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1645 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1646 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1647 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1648 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1649 continue; 1650 1651 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1652 dpcm->fe->dai_link->name); 1653 1654 soc_pcm_hw_free(be_substream); 1655 1656 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1657 } 1658 1659 return 0; 1660 } 1661 1662 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1663 { 1664 struct snd_soc_pcm_runtime *fe = substream->private_data; 1665 int err, stream = substream->stream; 1666 1667 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1668 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1669 1670 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1671 1672 /* call hw_free on the frontend */ 1673 err = soc_pcm_hw_free(substream); 1674 if (err < 0) 1675 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 1676 fe->dai_link->name); 1677 1678 /* only hw_params backends that are either sinks or sources 1679 * to this frontend DAI */ 1680 err = dpcm_be_dai_hw_free(fe, stream); 1681 1682 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1683 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1684 1685 mutex_unlock(&fe->card->mutex); 1686 return 0; 1687 } 1688 1689 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1690 { 1691 struct snd_soc_dpcm *dpcm; 1692 int ret; 1693 1694 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1695 1696 struct snd_soc_pcm_runtime *be = dpcm->be; 1697 struct snd_pcm_substream *be_substream = 1698 snd_soc_dpcm_get_substream(be, stream); 1699 1700 /* is this op for this BE ? */ 1701 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1702 continue; 1703 1704 /* only allow hw_params() if no connected FEs are running */ 1705 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 1706 continue; 1707 1708 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1709 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1710 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 1711 continue; 1712 1713 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 1714 dpcm->fe->dai_link->name); 1715 1716 /* copy params for each dpcm */ 1717 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1718 sizeof(struct snd_pcm_hw_params)); 1719 1720 /* perform any hw_params fixups */ 1721 if (be->dai_link->be_hw_params_fixup) { 1722 ret = be->dai_link->be_hw_params_fixup(be, 1723 &dpcm->hw_params); 1724 if (ret < 0) { 1725 dev_err(be->dev, 1726 "ASoC: hw_params BE fixup failed %d\n", 1727 ret); 1728 goto unwind; 1729 } 1730 } 1731 1732 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 1733 if (ret < 0) { 1734 dev_err(dpcm->be->dev, 1735 "ASoC: hw_params BE failed %d\n", ret); 1736 goto unwind; 1737 } 1738 1739 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1740 } 1741 return 0; 1742 1743 unwind: 1744 /* disable any enabled and non active backends */ 1745 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1746 struct snd_soc_pcm_runtime *be = dpcm->be; 1747 struct snd_pcm_substream *be_substream = 1748 snd_soc_dpcm_get_substream(be, stream); 1749 1750 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1751 continue; 1752 1753 /* only allow hw_free() if no connected FEs are running */ 1754 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1755 continue; 1756 1757 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1758 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1759 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1760 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1761 continue; 1762 1763 soc_pcm_hw_free(be_substream); 1764 } 1765 1766 return ret; 1767 } 1768 1769 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 1770 struct snd_pcm_hw_params *params) 1771 { 1772 struct snd_soc_pcm_runtime *fe = substream->private_data; 1773 int ret, stream = substream->stream; 1774 1775 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1776 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1777 1778 memcpy(&fe->dpcm[substream->stream].hw_params, params, 1779 sizeof(struct snd_pcm_hw_params)); 1780 ret = dpcm_be_dai_hw_params(fe, substream->stream); 1781 if (ret < 0) { 1782 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 1783 goto out; 1784 } 1785 1786 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 1787 fe->dai_link->name, params_rate(params), 1788 params_channels(params), params_format(params)); 1789 1790 /* call hw_params on the frontend */ 1791 ret = soc_pcm_hw_params(substream, params); 1792 if (ret < 0) { 1793 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 1794 dpcm_be_dai_hw_free(fe, stream); 1795 } else 1796 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1797 1798 out: 1799 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1800 mutex_unlock(&fe->card->mutex); 1801 return ret; 1802 } 1803 1804 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 1805 struct snd_pcm_substream *substream, int cmd) 1806 { 1807 int ret; 1808 1809 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 1810 dpcm->fe->dai_link->name, cmd); 1811 1812 ret = soc_pcm_trigger(substream, cmd); 1813 if (ret < 0) 1814 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 1815 1816 return ret; 1817 } 1818 1819 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 1820 int cmd) 1821 { 1822 struct snd_soc_dpcm *dpcm; 1823 int ret = 0; 1824 1825 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1826 1827 struct snd_soc_pcm_runtime *be = dpcm->be; 1828 struct snd_pcm_substream *be_substream = 1829 snd_soc_dpcm_get_substream(be, stream); 1830 1831 /* is this op for this BE ? */ 1832 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1833 continue; 1834 1835 switch (cmd) { 1836 case SNDRV_PCM_TRIGGER_START: 1837 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1838 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1839 continue; 1840 1841 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1842 if (ret) 1843 return ret; 1844 1845 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1846 break; 1847 case SNDRV_PCM_TRIGGER_RESUME: 1848 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1849 continue; 1850 1851 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1852 if (ret) 1853 return ret; 1854 1855 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1856 break; 1857 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1858 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 1859 continue; 1860 1861 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1862 if (ret) 1863 return ret; 1864 1865 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1866 break; 1867 case SNDRV_PCM_TRIGGER_STOP: 1868 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1869 continue; 1870 1871 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 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_STOP; 1879 break; 1880 case SNDRV_PCM_TRIGGER_SUSPEND: 1881 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1882 continue; 1883 1884 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1885 continue; 1886 1887 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1888 if (ret) 1889 return ret; 1890 1891 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 1892 break; 1893 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1894 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1895 continue; 1896 1897 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1898 continue; 1899 1900 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1901 if (ret) 1902 return ret; 1903 1904 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 1905 break; 1906 } 1907 } 1908 1909 return ret; 1910 } 1911 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 1912 1913 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 1914 { 1915 struct snd_soc_pcm_runtime *fe = substream->private_data; 1916 int stream = substream->stream, ret; 1917 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 1918 1919 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1920 1921 switch (trigger) { 1922 case SND_SOC_DPCM_TRIGGER_PRE: 1923 /* call trigger on the frontend before the backend. */ 1924 1925 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 1926 fe->dai_link->name, cmd); 1927 1928 ret = soc_pcm_trigger(substream, cmd); 1929 if (ret < 0) { 1930 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1931 goto out; 1932 } 1933 1934 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1935 break; 1936 case SND_SOC_DPCM_TRIGGER_POST: 1937 /* call trigger on the frontend after the backend. */ 1938 1939 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1940 if (ret < 0) { 1941 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1942 goto out; 1943 } 1944 1945 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 1946 fe->dai_link->name, cmd); 1947 1948 ret = soc_pcm_trigger(substream, cmd); 1949 break; 1950 case SND_SOC_DPCM_TRIGGER_BESPOKE: 1951 /* bespoke trigger() - handles both FE and BEs */ 1952 1953 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 1954 fe->dai_link->name, cmd); 1955 1956 ret = soc_pcm_bespoke_trigger(substream, cmd); 1957 if (ret < 0) { 1958 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1959 goto out; 1960 } 1961 break; 1962 default: 1963 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 1964 fe->dai_link->name); 1965 ret = -EINVAL; 1966 goto out; 1967 } 1968 1969 switch (cmd) { 1970 case SNDRV_PCM_TRIGGER_START: 1971 case SNDRV_PCM_TRIGGER_RESUME: 1972 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1973 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1974 break; 1975 case SNDRV_PCM_TRIGGER_STOP: 1976 case SNDRV_PCM_TRIGGER_SUSPEND: 1977 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1978 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 1979 break; 1980 } 1981 1982 out: 1983 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 1984 return ret; 1985 } 1986 1987 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 1988 { 1989 struct snd_soc_dpcm *dpcm; 1990 int ret = 0; 1991 1992 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1993 1994 struct snd_soc_pcm_runtime *be = dpcm->be; 1995 struct snd_pcm_substream *be_substream = 1996 snd_soc_dpcm_get_substream(be, stream); 1997 1998 /* is this op for this BE ? */ 1999 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2000 continue; 2001 2002 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2003 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2004 continue; 2005 2006 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2007 dpcm->fe->dai_link->name); 2008 2009 ret = soc_pcm_prepare(be_substream); 2010 if (ret < 0) { 2011 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2012 ret); 2013 break; 2014 } 2015 2016 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2017 } 2018 return ret; 2019 } 2020 2021 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2022 { 2023 struct snd_soc_pcm_runtime *fe = substream->private_data; 2024 int stream = substream->stream, ret = 0; 2025 2026 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2027 2028 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2029 2030 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2031 2032 /* there is no point preparing this FE if there are no BEs */ 2033 if (list_empty(&fe->dpcm[stream].be_clients)) { 2034 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2035 fe->dai_link->name); 2036 ret = -EINVAL; 2037 goto out; 2038 } 2039 2040 ret = dpcm_be_dai_prepare(fe, substream->stream); 2041 if (ret < 0) 2042 goto out; 2043 2044 /* call prepare on the frontend */ 2045 ret = soc_pcm_prepare(substream); 2046 if (ret < 0) { 2047 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2048 fe->dai_link->name); 2049 goto out; 2050 } 2051 2052 /* run the stream event for each BE */ 2053 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2054 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2055 2056 out: 2057 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2058 mutex_unlock(&fe->card->mutex); 2059 2060 return ret; 2061 } 2062 2063 static int soc_pcm_ioctl(struct snd_pcm_substream *substream, 2064 unsigned int cmd, void *arg) 2065 { 2066 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2067 struct snd_soc_platform *platform = rtd->platform; 2068 2069 if (platform->driver->ops && platform->driver->ops->ioctl) 2070 return platform->driver->ops->ioctl(substream, cmd, arg); 2071 return snd_pcm_lib_ioctl(substream, cmd, arg); 2072 } 2073 2074 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2075 { 2076 struct snd_pcm_substream *substream = 2077 snd_soc_dpcm_get_substream(fe, stream); 2078 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2079 int err; 2080 2081 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2082 stream ? "capture" : "playback", fe->dai_link->name); 2083 2084 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2085 /* call bespoke trigger - FE takes care of all BE triggers */ 2086 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2087 fe->dai_link->name); 2088 2089 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2090 if (err < 0) 2091 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2092 } else { 2093 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2094 fe->dai_link->name); 2095 2096 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2097 if (err < 0) 2098 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2099 } 2100 2101 err = dpcm_be_dai_hw_free(fe, stream); 2102 if (err < 0) 2103 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2104 2105 err = dpcm_be_dai_shutdown(fe, stream); 2106 if (err < 0) 2107 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2108 2109 /* run the stream event for each BE */ 2110 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2111 2112 return 0; 2113 } 2114 2115 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2116 { 2117 struct snd_pcm_substream *substream = 2118 snd_soc_dpcm_get_substream(fe, stream); 2119 struct snd_soc_dpcm *dpcm; 2120 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2121 int ret; 2122 2123 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2124 stream ? "capture" : "playback", fe->dai_link->name); 2125 2126 /* Only start the BE if the FE is ready */ 2127 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2128 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2129 return -EINVAL; 2130 2131 /* startup must always be called for new BEs */ 2132 ret = dpcm_be_dai_startup(fe, stream); 2133 if (ret < 0) 2134 goto disconnect; 2135 2136 /* keep going if FE state is > open */ 2137 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2138 return 0; 2139 2140 ret = dpcm_be_dai_hw_params(fe, stream); 2141 if (ret < 0) 2142 goto close; 2143 2144 /* keep going if FE state is > hw_params */ 2145 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2146 return 0; 2147 2148 2149 ret = dpcm_be_dai_prepare(fe, stream); 2150 if (ret < 0) 2151 goto hw_free; 2152 2153 /* run the stream event for each BE */ 2154 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2155 2156 /* keep going if FE state is > prepare */ 2157 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2158 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2159 return 0; 2160 2161 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2162 /* call trigger on the frontend - FE takes care of all BE triggers */ 2163 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2164 fe->dai_link->name); 2165 2166 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2167 if (ret < 0) { 2168 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2169 goto hw_free; 2170 } 2171 } else { 2172 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2173 fe->dai_link->name); 2174 2175 ret = dpcm_be_dai_trigger(fe, stream, 2176 SNDRV_PCM_TRIGGER_START); 2177 if (ret < 0) { 2178 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2179 goto hw_free; 2180 } 2181 } 2182 2183 return 0; 2184 2185 hw_free: 2186 dpcm_be_dai_hw_free(fe, stream); 2187 close: 2188 dpcm_be_dai_shutdown(fe, stream); 2189 disconnect: 2190 /* disconnect any non started BEs */ 2191 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2192 struct snd_soc_pcm_runtime *be = dpcm->be; 2193 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2194 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2195 } 2196 2197 return ret; 2198 } 2199 2200 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2201 { 2202 int ret; 2203 2204 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 2205 ret = dpcm_run_update_startup(fe, stream); 2206 if (ret < 0) 2207 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2208 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2209 2210 return ret; 2211 } 2212 2213 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2214 { 2215 int ret; 2216 2217 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 2218 ret = dpcm_run_update_shutdown(fe, stream); 2219 if (ret < 0) 2220 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2221 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2222 2223 return ret; 2224 } 2225 2226 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2227 * any DAI links. 2228 */ 2229 int soc_dpcm_runtime_update(struct snd_soc_card *card) 2230 { 2231 int i, old, new, paths; 2232 2233 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2234 for (i = 0; i < card->num_rtd; i++) { 2235 struct snd_soc_dapm_widget_list *list; 2236 struct snd_soc_pcm_runtime *fe = &card->rtd[i]; 2237 2238 /* make sure link is FE */ 2239 if (!fe->dai_link->dynamic) 2240 continue; 2241 2242 /* only check active links */ 2243 if (!fe->cpu_dai->active) 2244 continue; 2245 2246 /* DAPM sync will call this to update DSP paths */ 2247 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n", 2248 fe->dai_link->name); 2249 2250 /* skip if FE doesn't have playback capability */ 2251 if (!fe->cpu_dai->driver->playback.channels_min) 2252 goto capture; 2253 2254 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2255 if (paths < 0) { 2256 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2257 fe->dai_link->name, "playback"); 2258 mutex_unlock(&card->mutex); 2259 return paths; 2260 } 2261 2262 /* update any new playback paths */ 2263 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1); 2264 if (new) { 2265 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2266 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2267 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2268 } 2269 2270 /* update any old playback paths */ 2271 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0); 2272 if (old) { 2273 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2274 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2275 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2276 } 2277 2278 dpcm_path_put(&list); 2279 capture: 2280 /* skip if FE doesn't have capture capability */ 2281 if (!fe->cpu_dai->driver->capture.channels_min) 2282 continue; 2283 2284 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2285 if (paths < 0) { 2286 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2287 fe->dai_link->name, "capture"); 2288 mutex_unlock(&card->mutex); 2289 return paths; 2290 } 2291 2292 /* update any new capture paths */ 2293 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1); 2294 if (new) { 2295 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2296 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2297 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2298 } 2299 2300 /* update any old capture paths */ 2301 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0); 2302 if (old) { 2303 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2304 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2305 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2306 } 2307 2308 dpcm_path_put(&list); 2309 } 2310 2311 mutex_unlock(&card->mutex); 2312 return 0; 2313 } 2314 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2315 { 2316 struct snd_soc_dpcm *dpcm; 2317 struct list_head *clients = 2318 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients; 2319 2320 list_for_each_entry(dpcm, clients, list_be) { 2321 2322 struct snd_soc_pcm_runtime *be = dpcm->be; 2323 int i; 2324 2325 if (be->dai_link->ignore_suspend) 2326 continue; 2327 2328 for (i = 0; i < be->num_codecs; i++) { 2329 struct snd_soc_dai *dai = be->codec_dais[i]; 2330 struct snd_soc_dai_driver *drv = dai->driver; 2331 2332 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2333 be->dai_link->name); 2334 2335 if (drv->ops && drv->ops->digital_mute && 2336 dai->playback_active) 2337 drv->ops->digital_mute(dai, mute); 2338 } 2339 } 2340 2341 return 0; 2342 } 2343 2344 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2345 { 2346 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2347 struct snd_soc_dpcm *dpcm; 2348 struct snd_soc_dapm_widget_list *list; 2349 int ret; 2350 int stream = fe_substream->stream; 2351 2352 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2353 fe->dpcm[stream].runtime = fe_substream->runtime; 2354 2355 ret = dpcm_path_get(fe, stream, &list); 2356 if (ret < 0) { 2357 mutex_unlock(&fe->card->mutex); 2358 return ret; 2359 } else if (ret == 0) { 2360 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2361 fe->dai_link->name, stream ? "capture" : "playback"); 2362 } 2363 2364 /* calculate valid and active FE <-> BE dpcms */ 2365 dpcm_process_paths(fe, stream, &list, 1); 2366 2367 ret = dpcm_fe_dai_startup(fe_substream); 2368 if (ret < 0) { 2369 /* clean up all links */ 2370 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2371 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2372 2373 dpcm_be_disconnect(fe, stream); 2374 fe->dpcm[stream].runtime = NULL; 2375 } 2376 2377 dpcm_clear_pending_state(fe, stream); 2378 dpcm_path_put(&list); 2379 mutex_unlock(&fe->card->mutex); 2380 return ret; 2381 } 2382 2383 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2384 { 2385 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2386 struct snd_soc_dpcm *dpcm; 2387 int stream = fe_substream->stream, ret; 2388 2389 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2390 ret = dpcm_fe_dai_shutdown(fe_substream); 2391 2392 /* mark FE's links ready to prune */ 2393 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2394 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2395 2396 dpcm_be_disconnect(fe, stream); 2397 2398 fe->dpcm[stream].runtime = NULL; 2399 mutex_unlock(&fe->card->mutex); 2400 return ret; 2401 } 2402 2403 /* create a new pcm */ 2404 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2405 { 2406 struct snd_soc_platform *platform = rtd->platform; 2407 struct snd_soc_dai *codec_dai; 2408 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2409 struct snd_pcm *pcm; 2410 char new_name[64]; 2411 int ret = 0, playback = 0, capture = 0; 2412 int i; 2413 2414 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2415 playback = rtd->dai_link->dpcm_playback; 2416 capture = rtd->dai_link->dpcm_capture; 2417 } else { 2418 for (i = 0; i < rtd->num_codecs; i++) { 2419 codec_dai = rtd->codec_dais[i]; 2420 if (codec_dai->driver->playback.channels_min) 2421 playback = 1; 2422 if (codec_dai->driver->capture.channels_min) 2423 capture = 1; 2424 } 2425 2426 capture = capture && cpu_dai->driver->capture.channels_min; 2427 playback = playback && cpu_dai->driver->playback.channels_min; 2428 } 2429 2430 if (rtd->dai_link->playback_only) { 2431 playback = 1; 2432 capture = 0; 2433 } 2434 2435 if (rtd->dai_link->capture_only) { 2436 playback = 0; 2437 capture = 1; 2438 } 2439 2440 /* create the PCM */ 2441 if (rtd->dai_link->no_pcm) { 2442 snprintf(new_name, sizeof(new_name), "(%s)", 2443 rtd->dai_link->stream_name); 2444 2445 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2446 playback, capture, &pcm); 2447 } else { 2448 if (rtd->dai_link->dynamic) 2449 snprintf(new_name, sizeof(new_name), "%s (*)", 2450 rtd->dai_link->stream_name); 2451 else 2452 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2453 rtd->dai_link->stream_name, 2454 (rtd->num_codecs > 1) ? 2455 "multicodec" : rtd->codec_dai->name, num); 2456 2457 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2458 capture, &pcm); 2459 } 2460 if (ret < 0) { 2461 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2462 rtd->dai_link->name); 2463 return ret; 2464 } 2465 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2466 2467 /* DAPM dai link stream work */ 2468 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 2469 2470 rtd->pcm = pcm; 2471 pcm->private_data = rtd; 2472 2473 if (rtd->dai_link->no_pcm) { 2474 if (playback) 2475 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2476 if (capture) 2477 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2478 goto out; 2479 } 2480 2481 /* ASoC PCM operations */ 2482 if (rtd->dai_link->dynamic) { 2483 rtd->ops.open = dpcm_fe_dai_open; 2484 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2485 rtd->ops.prepare = dpcm_fe_dai_prepare; 2486 rtd->ops.trigger = dpcm_fe_dai_trigger; 2487 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2488 rtd->ops.close = dpcm_fe_dai_close; 2489 rtd->ops.pointer = soc_pcm_pointer; 2490 rtd->ops.ioctl = soc_pcm_ioctl; 2491 } else { 2492 rtd->ops.open = soc_pcm_open; 2493 rtd->ops.hw_params = soc_pcm_hw_params; 2494 rtd->ops.prepare = soc_pcm_prepare; 2495 rtd->ops.trigger = soc_pcm_trigger; 2496 rtd->ops.hw_free = soc_pcm_hw_free; 2497 rtd->ops.close = soc_pcm_close; 2498 rtd->ops.pointer = soc_pcm_pointer; 2499 rtd->ops.ioctl = soc_pcm_ioctl; 2500 } 2501 2502 if (platform->driver->ops) { 2503 rtd->ops.ack = platform->driver->ops->ack; 2504 rtd->ops.copy = platform->driver->ops->copy; 2505 rtd->ops.silence = platform->driver->ops->silence; 2506 rtd->ops.page = platform->driver->ops->page; 2507 rtd->ops.mmap = platform->driver->ops->mmap; 2508 } 2509 2510 if (playback) 2511 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2512 2513 if (capture) 2514 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2515 2516 if (platform->driver->pcm_new) { 2517 ret = platform->driver->pcm_new(rtd); 2518 if (ret < 0) { 2519 dev_err(platform->dev, 2520 "ASoC: pcm constructor failed: %d\n", 2521 ret); 2522 return ret; 2523 } 2524 } 2525 2526 pcm->private_free = platform->driver->pcm_free; 2527 out: 2528 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 2529 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 2530 cpu_dai->name); 2531 return ret; 2532 } 2533 2534 /* is the current PCM operation for this FE ? */ 2535 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2536 { 2537 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2538 return 1; 2539 return 0; 2540 } 2541 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2542 2543 /* is the current PCM operation for this BE ? */ 2544 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2545 struct snd_soc_pcm_runtime *be, int stream) 2546 { 2547 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2548 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2549 be->dpcm[stream].runtime_update)) 2550 return 1; 2551 return 0; 2552 } 2553 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2554 2555 /* get the substream for this BE */ 2556 struct snd_pcm_substream * 2557 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2558 { 2559 return be->pcm->streams[stream].substream; 2560 } 2561 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2562 2563 /* get the BE runtime state */ 2564 enum snd_soc_dpcm_state 2565 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 2566 { 2567 return be->dpcm[stream].state; 2568 } 2569 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 2570 2571 /* set the BE runtime state */ 2572 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 2573 int stream, enum snd_soc_dpcm_state state) 2574 { 2575 be->dpcm[stream].state = state; 2576 } 2577 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 2578 2579 /* 2580 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2581 * are not running, paused or suspended for the specified stream direction. 2582 */ 2583 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2584 struct snd_soc_pcm_runtime *be, int stream) 2585 { 2586 struct snd_soc_dpcm *dpcm; 2587 int state; 2588 2589 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2590 2591 if (dpcm->fe == fe) 2592 continue; 2593 2594 state = dpcm->fe->dpcm[stream].state; 2595 if (state == SND_SOC_DPCM_STATE_START || 2596 state == SND_SOC_DPCM_STATE_PAUSED || 2597 state == SND_SOC_DPCM_STATE_SUSPEND) 2598 return 0; 2599 } 2600 2601 /* it's safe to free/stop this BE DAI */ 2602 return 1; 2603 } 2604 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 2605 2606 /* 2607 * We can only change hw params a BE DAI if any of it's FE are not prepared, 2608 * running, paused or suspended for the specified stream direction. 2609 */ 2610 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 2611 struct snd_soc_pcm_runtime *be, int stream) 2612 { 2613 struct snd_soc_dpcm *dpcm; 2614 int state; 2615 2616 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2617 2618 if (dpcm->fe == fe) 2619 continue; 2620 2621 state = dpcm->fe->dpcm[stream].state; 2622 if (state == SND_SOC_DPCM_STATE_START || 2623 state == SND_SOC_DPCM_STATE_PAUSED || 2624 state == SND_SOC_DPCM_STATE_SUSPEND || 2625 state == SND_SOC_DPCM_STATE_PREPARE) 2626 return 0; 2627 } 2628 2629 /* it's safe to change hw_params */ 2630 return 1; 2631 } 2632 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 2633 2634 int snd_soc_platform_trigger(struct snd_pcm_substream *substream, 2635 int cmd, struct snd_soc_platform *platform) 2636 { 2637 if (platform->driver->ops && platform->driver->ops->trigger) 2638 return platform->driver->ops->trigger(substream, cmd); 2639 return 0; 2640 } 2641 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger); 2642 2643 #ifdef CONFIG_DEBUG_FS 2644 static char *dpcm_state_string(enum snd_soc_dpcm_state state) 2645 { 2646 switch (state) { 2647 case SND_SOC_DPCM_STATE_NEW: 2648 return "new"; 2649 case SND_SOC_DPCM_STATE_OPEN: 2650 return "open"; 2651 case SND_SOC_DPCM_STATE_HW_PARAMS: 2652 return "hw_params"; 2653 case SND_SOC_DPCM_STATE_PREPARE: 2654 return "prepare"; 2655 case SND_SOC_DPCM_STATE_START: 2656 return "start"; 2657 case SND_SOC_DPCM_STATE_STOP: 2658 return "stop"; 2659 case SND_SOC_DPCM_STATE_SUSPEND: 2660 return "suspend"; 2661 case SND_SOC_DPCM_STATE_PAUSED: 2662 return "paused"; 2663 case SND_SOC_DPCM_STATE_HW_FREE: 2664 return "hw_free"; 2665 case SND_SOC_DPCM_STATE_CLOSE: 2666 return "close"; 2667 } 2668 2669 return "unknown"; 2670 } 2671 2672 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 2673 int stream, char *buf, size_t size) 2674 { 2675 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 2676 struct snd_soc_dpcm *dpcm; 2677 ssize_t offset = 0; 2678 2679 /* FE state */ 2680 offset += snprintf(buf + offset, size - offset, 2681 "[%s - %s]\n", fe->dai_link->name, 2682 stream ? "Capture" : "Playback"); 2683 2684 offset += snprintf(buf + offset, size - offset, "State: %s\n", 2685 dpcm_state_string(fe->dpcm[stream].state)); 2686 2687 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2688 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2689 offset += snprintf(buf + offset, size - offset, 2690 "Hardware Params: " 2691 "Format = %s, Channels = %d, Rate = %d\n", 2692 snd_pcm_format_name(params_format(params)), 2693 params_channels(params), 2694 params_rate(params)); 2695 2696 /* BEs state */ 2697 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 2698 2699 if (list_empty(&fe->dpcm[stream].be_clients)) { 2700 offset += snprintf(buf + offset, size - offset, 2701 " No active DSP links\n"); 2702 goto out; 2703 } 2704 2705 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2706 struct snd_soc_pcm_runtime *be = dpcm->be; 2707 params = &dpcm->hw_params; 2708 2709 offset += snprintf(buf + offset, size - offset, 2710 "- %s\n", be->dai_link->name); 2711 2712 offset += snprintf(buf + offset, size - offset, 2713 " State: %s\n", 2714 dpcm_state_string(be->dpcm[stream].state)); 2715 2716 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2717 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2718 offset += snprintf(buf + offset, size - offset, 2719 " Hardware Params: " 2720 "Format = %s, Channels = %d, Rate = %d\n", 2721 snd_pcm_format_name(params_format(params)), 2722 params_channels(params), 2723 params_rate(params)); 2724 } 2725 2726 out: 2727 return offset; 2728 } 2729 2730 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 2731 size_t count, loff_t *ppos) 2732 { 2733 struct snd_soc_pcm_runtime *fe = file->private_data; 2734 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 2735 char *buf; 2736 2737 buf = kmalloc(out_count, GFP_KERNEL); 2738 if (!buf) 2739 return -ENOMEM; 2740 2741 if (fe->cpu_dai->driver->playback.channels_min) 2742 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 2743 buf + offset, out_count - offset); 2744 2745 if (fe->cpu_dai->driver->capture.channels_min) 2746 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 2747 buf + offset, out_count - offset); 2748 2749 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 2750 2751 kfree(buf); 2752 return ret; 2753 } 2754 2755 static const struct file_operations dpcm_state_fops = { 2756 .open = simple_open, 2757 .read = dpcm_state_read_file, 2758 .llseek = default_llseek, 2759 }; 2760 2761 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 2762 { 2763 if (!rtd->dai_link) 2764 return 0; 2765 2766 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 2767 rtd->card->debugfs_card_root); 2768 if (!rtd->debugfs_dpcm_root) { 2769 dev_dbg(rtd->dev, 2770 "ASoC: Failed to create dpcm debugfs directory %s\n", 2771 rtd->dai_link->name); 2772 return -EINVAL; 2773 } 2774 2775 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444, 2776 rtd->debugfs_dpcm_root, 2777 rtd, &dpcm_state_fops); 2778 2779 return 0; 2780 } 2781 #endif 2782