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