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 int paths; 1238 1239 /* get number of valid DAI paths and their widgets */ 1240 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list); 1241 1242 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1243 stream ? "capture" : "playback"); 1244 1245 return paths; 1246 } 1247 1248 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1249 struct snd_soc_dapm_widget_list **list_) 1250 { 1251 struct snd_soc_dpcm *dpcm; 1252 struct snd_soc_dapm_widget_list *list = *list_; 1253 struct snd_soc_dapm_widget *widget; 1254 int prune = 0; 1255 1256 /* Destroy any old FE <--> BE connections */ 1257 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1258 unsigned int i; 1259 1260 /* is there a valid CPU DAI widget for this BE */ 1261 widget = dai_get_widget(dpcm->be->cpu_dai, stream); 1262 1263 /* prune the BE if it's no longer in our active list */ 1264 if (widget && widget_in_list(list, widget)) 1265 continue; 1266 1267 /* is there a valid CODEC DAI widget for this BE */ 1268 for (i = 0; i < dpcm->be->num_codecs; i++) { 1269 struct snd_soc_dai *dai = dpcm->be->codec_dais[i]; 1270 widget = dai_get_widget(dai, stream); 1271 1272 /* prune the BE if it's no longer in our active list */ 1273 if (widget && widget_in_list(list, widget)) 1274 continue; 1275 } 1276 1277 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1278 stream ? "capture" : "playback", 1279 dpcm->be->dai_link->name, fe->dai_link->name); 1280 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1281 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1282 prune++; 1283 } 1284 1285 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1286 return prune; 1287 } 1288 1289 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1290 struct snd_soc_dapm_widget_list **list_) 1291 { 1292 struct snd_soc_card *card = fe->card; 1293 struct snd_soc_dapm_widget_list *list = *list_; 1294 struct snd_soc_pcm_runtime *be; 1295 int i, new = 0, err; 1296 1297 /* Create any new FE <--> BE connections */ 1298 for (i = 0; i < list->num_widgets; i++) { 1299 1300 switch (list->widgets[i]->id) { 1301 case snd_soc_dapm_dai_in: 1302 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1303 continue; 1304 break; 1305 case snd_soc_dapm_dai_out: 1306 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1307 continue; 1308 break; 1309 default: 1310 continue; 1311 } 1312 1313 /* is there a valid BE rtd for this widget */ 1314 be = dpcm_get_be(card, list->widgets[i], stream); 1315 if (!be) { 1316 dev_err(fe->dev, "ASoC: no BE found for %s\n", 1317 list->widgets[i]->name); 1318 continue; 1319 } 1320 1321 /* make sure BE is a real BE */ 1322 if (!be->dai_link->no_pcm) 1323 continue; 1324 1325 /* don't connect if FE is not running */ 1326 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1327 continue; 1328 1329 /* newly connected FE and BE */ 1330 err = dpcm_be_connect(fe, be, stream); 1331 if (err < 0) { 1332 dev_err(fe->dev, "ASoC: can't connect %s\n", 1333 list->widgets[i]->name); 1334 break; 1335 } else if (err == 0) /* already connected */ 1336 continue; 1337 1338 /* new */ 1339 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1340 new++; 1341 } 1342 1343 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1344 return new; 1345 } 1346 1347 /* 1348 * Find the corresponding BE DAIs that source or sink audio to this 1349 * FE substream. 1350 */ 1351 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1352 int stream, struct snd_soc_dapm_widget_list **list, int new) 1353 { 1354 if (new) 1355 return dpcm_add_paths(fe, stream, list); 1356 else 1357 return dpcm_prune_paths(fe, stream, list); 1358 } 1359 1360 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1361 { 1362 struct snd_soc_dpcm *dpcm; 1363 1364 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 1365 dpcm->be->dpcm[stream].runtime_update = 1366 SND_SOC_DPCM_UPDATE_NO; 1367 } 1368 1369 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1370 int stream) 1371 { 1372 struct snd_soc_dpcm *dpcm; 1373 1374 /* disable any enabled and non active backends */ 1375 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1376 1377 struct snd_soc_pcm_runtime *be = dpcm->be; 1378 struct snd_pcm_substream *be_substream = 1379 snd_soc_dpcm_get_substream(be, stream); 1380 1381 if (be->dpcm[stream].users == 0) 1382 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1383 stream ? "capture" : "playback", 1384 be->dpcm[stream].state); 1385 1386 if (--be->dpcm[stream].users != 0) 1387 continue; 1388 1389 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1390 continue; 1391 1392 soc_pcm_close(be_substream); 1393 be_substream->runtime = NULL; 1394 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1395 } 1396 } 1397 1398 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1399 { 1400 struct snd_soc_dpcm *dpcm; 1401 int err, count = 0; 1402 1403 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1404 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1405 1406 struct snd_soc_pcm_runtime *be = dpcm->be; 1407 struct snd_pcm_substream *be_substream = 1408 snd_soc_dpcm_get_substream(be, stream); 1409 1410 if (!be_substream) { 1411 dev_err(be->dev, "ASoC: no backend %s stream\n", 1412 stream ? "capture" : "playback"); 1413 continue; 1414 } 1415 1416 /* is this op for this BE ? */ 1417 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1418 continue; 1419 1420 /* first time the dpcm is open ? */ 1421 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1422 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1423 stream ? "capture" : "playback", 1424 be->dpcm[stream].state); 1425 1426 if (be->dpcm[stream].users++ != 0) 1427 continue; 1428 1429 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1430 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1431 continue; 1432 1433 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1434 stream ? "capture" : "playback", be->dai_link->name); 1435 1436 be_substream->runtime = be->dpcm[stream].runtime; 1437 err = soc_pcm_open(be_substream); 1438 if (err < 0) { 1439 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1440 be->dpcm[stream].users--; 1441 if (be->dpcm[stream].users < 0) 1442 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1443 stream ? "capture" : "playback", 1444 be->dpcm[stream].state); 1445 1446 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1447 goto unwind; 1448 } 1449 1450 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1451 count++; 1452 } 1453 1454 return count; 1455 1456 unwind: 1457 /* disable any enabled and non active backends */ 1458 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1459 struct snd_soc_pcm_runtime *be = dpcm->be; 1460 struct snd_pcm_substream *be_substream = 1461 snd_soc_dpcm_get_substream(be, stream); 1462 1463 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1464 continue; 1465 1466 if (be->dpcm[stream].users == 0) 1467 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1468 stream ? "capture" : "playback", 1469 be->dpcm[stream].state); 1470 1471 if (--be->dpcm[stream].users != 0) 1472 continue; 1473 1474 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1475 continue; 1476 1477 soc_pcm_close(be_substream); 1478 be_substream->runtime = NULL; 1479 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1480 } 1481 1482 return err; 1483 } 1484 1485 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 1486 struct snd_soc_pcm_stream *stream, 1487 u64 formats) 1488 { 1489 runtime->hw.rate_min = stream->rate_min; 1490 runtime->hw.rate_max = stream->rate_max; 1491 runtime->hw.channels_min = stream->channels_min; 1492 runtime->hw.channels_max = stream->channels_max; 1493 if (runtime->hw.formats) 1494 runtime->hw.formats &= formats & stream->formats; 1495 else 1496 runtime->hw.formats = formats & stream->formats; 1497 runtime->hw.rates = stream->rates; 1498 } 1499 1500 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream) 1501 { 1502 struct snd_soc_pcm_runtime *fe = substream->private_data; 1503 struct snd_soc_dpcm *dpcm; 1504 u64 formats = ULLONG_MAX; 1505 int stream = substream->stream; 1506 1507 if (!fe->dai_link->dpcm_merged_format) 1508 return formats; 1509 1510 /* 1511 * It returns merged BE codec format 1512 * if FE want to use it (= dpcm_merged_format) 1513 */ 1514 1515 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1516 struct snd_soc_pcm_runtime *be = dpcm->be; 1517 struct snd_soc_dai_driver *codec_dai_drv; 1518 struct snd_soc_pcm_stream *codec_stream; 1519 int i; 1520 1521 for (i = 0; i < be->num_codecs; i++) { 1522 codec_dai_drv = be->codec_dais[i]->driver; 1523 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1524 codec_stream = &codec_dai_drv->playback; 1525 else 1526 codec_stream = &codec_dai_drv->capture; 1527 1528 formats &= codec_stream->formats; 1529 } 1530 } 1531 1532 return formats; 1533 } 1534 1535 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1536 { 1537 struct snd_pcm_runtime *runtime = substream->runtime; 1538 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1539 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1540 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 1541 u64 format = dpcm_runtime_base_format(substream); 1542 1543 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1544 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format); 1545 else 1546 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format); 1547 } 1548 1549 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 1550 1551 /* Set FE's runtime_update state; the state is protected via PCM stream lock 1552 * for avoiding the race with trigger callback. 1553 * If the state is unset and a trigger is pending while the previous operation, 1554 * process the pending trigger action here. 1555 */ 1556 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 1557 int stream, enum snd_soc_dpcm_update state) 1558 { 1559 struct snd_pcm_substream *substream = 1560 snd_soc_dpcm_get_substream(fe, stream); 1561 1562 snd_pcm_stream_lock_irq(substream); 1563 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 1564 dpcm_fe_dai_do_trigger(substream, 1565 fe->dpcm[stream].trigger_pending - 1); 1566 fe->dpcm[stream].trigger_pending = 0; 1567 } 1568 fe->dpcm[stream].runtime_update = state; 1569 snd_pcm_stream_unlock_irq(substream); 1570 } 1571 1572 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1573 { 1574 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1575 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1576 int stream = fe_substream->stream, ret = 0; 1577 1578 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1579 1580 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1581 if (ret < 0) { 1582 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1583 goto be_err; 1584 } 1585 1586 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1587 1588 /* start the DAI frontend */ 1589 ret = soc_pcm_open(fe_substream); 1590 if (ret < 0) { 1591 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 1592 goto unwind; 1593 } 1594 1595 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1596 1597 dpcm_set_fe_runtime(fe_substream); 1598 snd_pcm_limit_hw_rates(runtime); 1599 1600 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1601 return 0; 1602 1603 unwind: 1604 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1605 be_err: 1606 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1607 return ret; 1608 } 1609 1610 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1611 { 1612 struct snd_soc_dpcm *dpcm; 1613 1614 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 1615 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1616 1617 struct snd_soc_pcm_runtime *be = dpcm->be; 1618 struct snd_pcm_substream *be_substream = 1619 snd_soc_dpcm_get_substream(be, stream); 1620 1621 /* is this op for this BE ? */ 1622 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1623 continue; 1624 1625 if (be->dpcm[stream].users == 0) 1626 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1627 stream ? "capture" : "playback", 1628 be->dpcm[stream].state); 1629 1630 if (--be->dpcm[stream].users != 0) 1631 continue; 1632 1633 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1634 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) 1635 continue; 1636 1637 dev_dbg(be->dev, "ASoC: close BE %s\n", 1638 dpcm->fe->dai_link->name); 1639 1640 soc_pcm_close(be_substream); 1641 be_substream->runtime = NULL; 1642 1643 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1644 } 1645 return 0; 1646 } 1647 1648 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1649 { 1650 struct snd_soc_pcm_runtime *fe = substream->private_data; 1651 int stream = substream->stream; 1652 1653 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1654 1655 /* shutdown the BEs */ 1656 dpcm_be_dai_shutdown(fe, substream->stream); 1657 1658 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1659 1660 /* now shutdown the frontend */ 1661 soc_pcm_close(substream); 1662 1663 /* run the stream event for each BE */ 1664 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1665 1666 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1667 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1668 return 0; 1669 } 1670 1671 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1672 { 1673 struct snd_soc_dpcm *dpcm; 1674 1675 /* only hw_params backends that are either sinks or sources 1676 * to this frontend DAI */ 1677 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1678 1679 struct snd_soc_pcm_runtime *be = dpcm->be; 1680 struct snd_pcm_substream *be_substream = 1681 snd_soc_dpcm_get_substream(be, stream); 1682 1683 /* is this op for this BE ? */ 1684 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1685 continue; 1686 1687 /* only free hw when no longer used - check all FEs */ 1688 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1689 continue; 1690 1691 /* do not free hw if this BE is used by other FE */ 1692 if (be->dpcm[stream].users > 1) 1693 continue; 1694 1695 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1696 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1697 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1698 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1699 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1700 continue; 1701 1702 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1703 dpcm->fe->dai_link->name); 1704 1705 soc_pcm_hw_free(be_substream); 1706 1707 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1708 } 1709 1710 return 0; 1711 } 1712 1713 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1714 { 1715 struct snd_soc_pcm_runtime *fe = substream->private_data; 1716 int err, stream = substream->stream; 1717 1718 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1719 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1720 1721 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1722 1723 /* call hw_free on the frontend */ 1724 err = soc_pcm_hw_free(substream); 1725 if (err < 0) 1726 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 1727 fe->dai_link->name); 1728 1729 /* only hw_params backends that are either sinks or sources 1730 * to this frontend DAI */ 1731 err = dpcm_be_dai_hw_free(fe, stream); 1732 1733 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1734 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1735 1736 mutex_unlock(&fe->card->mutex); 1737 return 0; 1738 } 1739 1740 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1741 { 1742 struct snd_soc_dpcm *dpcm; 1743 int ret; 1744 1745 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1746 1747 struct snd_soc_pcm_runtime *be = dpcm->be; 1748 struct snd_pcm_substream *be_substream = 1749 snd_soc_dpcm_get_substream(be, stream); 1750 1751 /* is this op for this BE ? */ 1752 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1753 continue; 1754 1755 /* only allow hw_params() if no connected FEs are running */ 1756 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 1757 continue; 1758 1759 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1760 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1761 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 1762 continue; 1763 1764 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 1765 dpcm->fe->dai_link->name); 1766 1767 /* copy params for each dpcm */ 1768 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1769 sizeof(struct snd_pcm_hw_params)); 1770 1771 /* perform any hw_params fixups */ 1772 if (be->dai_link->be_hw_params_fixup) { 1773 ret = be->dai_link->be_hw_params_fixup(be, 1774 &dpcm->hw_params); 1775 if (ret < 0) { 1776 dev_err(be->dev, 1777 "ASoC: hw_params BE fixup failed %d\n", 1778 ret); 1779 goto unwind; 1780 } 1781 } 1782 1783 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 1784 if (ret < 0) { 1785 dev_err(dpcm->be->dev, 1786 "ASoC: hw_params BE failed %d\n", ret); 1787 goto unwind; 1788 } 1789 1790 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1791 } 1792 return 0; 1793 1794 unwind: 1795 /* disable any enabled and non active backends */ 1796 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1797 struct snd_soc_pcm_runtime *be = dpcm->be; 1798 struct snd_pcm_substream *be_substream = 1799 snd_soc_dpcm_get_substream(be, stream); 1800 1801 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1802 continue; 1803 1804 /* only allow hw_free() if no connected FEs are running */ 1805 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1806 continue; 1807 1808 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1809 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1810 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1811 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1812 continue; 1813 1814 soc_pcm_hw_free(be_substream); 1815 } 1816 1817 return ret; 1818 } 1819 1820 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 1821 struct snd_pcm_hw_params *params) 1822 { 1823 struct snd_soc_pcm_runtime *fe = substream->private_data; 1824 int ret, stream = substream->stream; 1825 1826 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1827 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1828 1829 memcpy(&fe->dpcm[substream->stream].hw_params, params, 1830 sizeof(struct snd_pcm_hw_params)); 1831 ret = dpcm_be_dai_hw_params(fe, substream->stream); 1832 if (ret < 0) { 1833 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 1834 goto out; 1835 } 1836 1837 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 1838 fe->dai_link->name, params_rate(params), 1839 params_channels(params), params_format(params)); 1840 1841 /* call hw_params on the frontend */ 1842 ret = soc_pcm_hw_params(substream, params); 1843 if (ret < 0) { 1844 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 1845 dpcm_be_dai_hw_free(fe, stream); 1846 } else 1847 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1848 1849 out: 1850 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1851 mutex_unlock(&fe->card->mutex); 1852 return ret; 1853 } 1854 1855 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 1856 struct snd_pcm_substream *substream, int cmd) 1857 { 1858 int ret; 1859 1860 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 1861 dpcm->fe->dai_link->name, cmd); 1862 1863 ret = soc_pcm_trigger(substream, cmd); 1864 if (ret < 0) 1865 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 1866 1867 return ret; 1868 } 1869 1870 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 1871 int cmd) 1872 { 1873 struct snd_soc_dpcm *dpcm; 1874 int ret = 0; 1875 1876 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1877 1878 struct snd_soc_pcm_runtime *be = dpcm->be; 1879 struct snd_pcm_substream *be_substream = 1880 snd_soc_dpcm_get_substream(be, stream); 1881 1882 /* is this op for this BE ? */ 1883 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1884 continue; 1885 1886 switch (cmd) { 1887 case SNDRV_PCM_TRIGGER_START: 1888 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1889 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1890 continue; 1891 1892 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1893 if (ret) 1894 return ret; 1895 1896 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1897 break; 1898 case SNDRV_PCM_TRIGGER_RESUME: 1899 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1900 continue; 1901 1902 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1903 if (ret) 1904 return ret; 1905 1906 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1907 break; 1908 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1909 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 1910 continue; 1911 1912 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1913 if (ret) 1914 return ret; 1915 1916 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1917 break; 1918 case SNDRV_PCM_TRIGGER_STOP: 1919 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1920 continue; 1921 1922 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1923 continue; 1924 1925 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1926 if (ret) 1927 return ret; 1928 1929 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 1930 break; 1931 case SNDRV_PCM_TRIGGER_SUSPEND: 1932 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1933 continue; 1934 1935 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1936 continue; 1937 1938 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1939 if (ret) 1940 return ret; 1941 1942 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 1943 break; 1944 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1945 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1946 continue; 1947 1948 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1949 continue; 1950 1951 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1952 if (ret) 1953 return ret; 1954 1955 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 1956 break; 1957 } 1958 } 1959 1960 return ret; 1961 } 1962 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 1963 1964 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 1965 { 1966 struct snd_soc_pcm_runtime *fe = substream->private_data; 1967 int stream = substream->stream, ret; 1968 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 1969 1970 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1971 1972 switch (trigger) { 1973 case SND_SOC_DPCM_TRIGGER_PRE: 1974 /* call trigger on the frontend before the backend. */ 1975 1976 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 1977 fe->dai_link->name, cmd); 1978 1979 ret = soc_pcm_trigger(substream, cmd); 1980 if (ret < 0) { 1981 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1982 goto out; 1983 } 1984 1985 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1986 break; 1987 case SND_SOC_DPCM_TRIGGER_POST: 1988 /* call trigger on the frontend after the backend. */ 1989 1990 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1991 if (ret < 0) { 1992 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1993 goto out; 1994 } 1995 1996 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 1997 fe->dai_link->name, cmd); 1998 1999 ret = soc_pcm_trigger(substream, cmd); 2000 break; 2001 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2002 /* bespoke trigger() - handles both FE and BEs */ 2003 2004 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2005 fe->dai_link->name, cmd); 2006 2007 ret = soc_pcm_bespoke_trigger(substream, cmd); 2008 if (ret < 0) { 2009 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2010 goto out; 2011 } 2012 break; 2013 default: 2014 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2015 fe->dai_link->name); 2016 ret = -EINVAL; 2017 goto out; 2018 } 2019 2020 switch (cmd) { 2021 case SNDRV_PCM_TRIGGER_START: 2022 case SNDRV_PCM_TRIGGER_RESUME: 2023 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2024 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2025 break; 2026 case SNDRV_PCM_TRIGGER_STOP: 2027 case SNDRV_PCM_TRIGGER_SUSPEND: 2028 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2029 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2030 break; 2031 } 2032 2033 out: 2034 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2035 return ret; 2036 } 2037 2038 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2039 { 2040 struct snd_soc_pcm_runtime *fe = substream->private_data; 2041 int stream = substream->stream; 2042 2043 /* if FE's runtime_update is already set, we're in race; 2044 * process this trigger later at exit 2045 */ 2046 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2047 fe->dpcm[stream].trigger_pending = cmd + 1; 2048 return 0; /* delayed, assuming it's successful */ 2049 } 2050 2051 /* we're alone, let's trigger */ 2052 return dpcm_fe_dai_do_trigger(substream, cmd); 2053 } 2054 2055 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2056 { 2057 struct snd_soc_dpcm *dpcm; 2058 int ret = 0; 2059 2060 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2061 2062 struct snd_soc_pcm_runtime *be = dpcm->be; 2063 struct snd_pcm_substream *be_substream = 2064 snd_soc_dpcm_get_substream(be, stream); 2065 2066 /* is this op for this BE ? */ 2067 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2068 continue; 2069 2070 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2071 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2072 continue; 2073 2074 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2075 dpcm->fe->dai_link->name); 2076 2077 ret = soc_pcm_prepare(be_substream); 2078 if (ret < 0) { 2079 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2080 ret); 2081 break; 2082 } 2083 2084 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2085 } 2086 return ret; 2087 } 2088 2089 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2090 { 2091 struct snd_soc_pcm_runtime *fe = substream->private_data; 2092 int stream = substream->stream, ret = 0; 2093 2094 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2095 2096 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2097 2098 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2099 2100 /* there is no point preparing this FE if there are no BEs */ 2101 if (list_empty(&fe->dpcm[stream].be_clients)) { 2102 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2103 fe->dai_link->name); 2104 ret = -EINVAL; 2105 goto out; 2106 } 2107 2108 ret = dpcm_be_dai_prepare(fe, substream->stream); 2109 if (ret < 0) 2110 goto out; 2111 2112 /* call prepare on the frontend */ 2113 ret = soc_pcm_prepare(substream); 2114 if (ret < 0) { 2115 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2116 fe->dai_link->name); 2117 goto out; 2118 } 2119 2120 /* run the stream event for each BE */ 2121 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2122 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2123 2124 out: 2125 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2126 mutex_unlock(&fe->card->mutex); 2127 2128 return ret; 2129 } 2130 2131 static int soc_pcm_ioctl(struct snd_pcm_substream *substream, 2132 unsigned int cmd, void *arg) 2133 { 2134 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2135 struct snd_soc_platform *platform = rtd->platform; 2136 2137 if (platform->driver->ops && platform->driver->ops->ioctl) 2138 return platform->driver->ops->ioctl(substream, cmd, arg); 2139 return snd_pcm_lib_ioctl(substream, cmd, arg); 2140 } 2141 2142 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2143 { 2144 struct snd_pcm_substream *substream = 2145 snd_soc_dpcm_get_substream(fe, stream); 2146 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2147 int err; 2148 2149 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2150 stream ? "capture" : "playback", fe->dai_link->name); 2151 2152 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2153 /* call bespoke trigger - FE takes care of all BE triggers */ 2154 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2155 fe->dai_link->name); 2156 2157 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2158 if (err < 0) 2159 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2160 } else { 2161 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2162 fe->dai_link->name); 2163 2164 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2165 if (err < 0) 2166 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2167 } 2168 2169 err = dpcm_be_dai_hw_free(fe, stream); 2170 if (err < 0) 2171 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2172 2173 err = dpcm_be_dai_shutdown(fe, stream); 2174 if (err < 0) 2175 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2176 2177 /* run the stream event for each BE */ 2178 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2179 2180 return 0; 2181 } 2182 2183 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2184 { 2185 struct snd_pcm_substream *substream = 2186 snd_soc_dpcm_get_substream(fe, stream); 2187 struct snd_soc_dpcm *dpcm; 2188 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2189 int ret; 2190 2191 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2192 stream ? "capture" : "playback", fe->dai_link->name); 2193 2194 /* Only start the BE if the FE is ready */ 2195 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2196 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2197 return -EINVAL; 2198 2199 /* startup must always be called for new BEs */ 2200 ret = dpcm_be_dai_startup(fe, stream); 2201 if (ret < 0) 2202 goto disconnect; 2203 2204 /* keep going if FE state is > open */ 2205 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2206 return 0; 2207 2208 ret = dpcm_be_dai_hw_params(fe, stream); 2209 if (ret < 0) 2210 goto close; 2211 2212 /* keep going if FE state is > hw_params */ 2213 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2214 return 0; 2215 2216 2217 ret = dpcm_be_dai_prepare(fe, stream); 2218 if (ret < 0) 2219 goto hw_free; 2220 2221 /* run the stream event for each BE */ 2222 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2223 2224 /* keep going if FE state is > prepare */ 2225 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2226 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2227 return 0; 2228 2229 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2230 /* call trigger on the frontend - FE takes care of all BE triggers */ 2231 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2232 fe->dai_link->name); 2233 2234 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2235 if (ret < 0) { 2236 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2237 goto hw_free; 2238 } 2239 } else { 2240 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2241 fe->dai_link->name); 2242 2243 ret = dpcm_be_dai_trigger(fe, stream, 2244 SNDRV_PCM_TRIGGER_START); 2245 if (ret < 0) { 2246 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2247 goto hw_free; 2248 } 2249 } 2250 2251 return 0; 2252 2253 hw_free: 2254 dpcm_be_dai_hw_free(fe, stream); 2255 close: 2256 dpcm_be_dai_shutdown(fe, stream); 2257 disconnect: 2258 /* disconnect any non started BEs */ 2259 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2260 struct snd_soc_pcm_runtime *be = dpcm->be; 2261 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2262 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2263 } 2264 2265 return ret; 2266 } 2267 2268 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2269 { 2270 int ret; 2271 2272 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2273 ret = dpcm_run_update_startup(fe, stream); 2274 if (ret < 0) 2275 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2276 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2277 2278 return ret; 2279 } 2280 2281 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2282 { 2283 int ret; 2284 2285 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2286 ret = dpcm_run_update_shutdown(fe, stream); 2287 if (ret < 0) 2288 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2289 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2290 2291 return ret; 2292 } 2293 2294 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2295 * any DAI links. 2296 */ 2297 int soc_dpcm_runtime_update(struct snd_soc_card *card) 2298 { 2299 int i, old, new, paths; 2300 2301 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2302 for (i = 0; i < card->num_rtd; i++) { 2303 struct snd_soc_dapm_widget_list *list; 2304 struct snd_soc_pcm_runtime *fe = &card->rtd[i]; 2305 2306 /* make sure link is FE */ 2307 if (!fe->dai_link->dynamic) 2308 continue; 2309 2310 /* only check active links */ 2311 if (!fe->cpu_dai->active) 2312 continue; 2313 2314 /* DAPM sync will call this to update DSP paths */ 2315 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n", 2316 fe->dai_link->name); 2317 2318 /* skip if FE doesn't have playback capability */ 2319 if (!fe->cpu_dai->driver->playback.channels_min 2320 || !fe->codec_dai->driver->playback.channels_min) 2321 goto capture; 2322 2323 /* skip if FE isn't currently playing */ 2324 if (!fe->cpu_dai->playback_active 2325 || !fe->codec_dai->playback_active) 2326 goto capture; 2327 2328 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2329 if (paths < 0) { 2330 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2331 fe->dai_link->name, "playback"); 2332 mutex_unlock(&card->mutex); 2333 return paths; 2334 } 2335 2336 /* update any new playback paths */ 2337 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1); 2338 if (new) { 2339 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2340 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2341 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2342 } 2343 2344 /* update any old playback paths */ 2345 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0); 2346 if (old) { 2347 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2348 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2349 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2350 } 2351 2352 dpcm_path_put(&list); 2353 capture: 2354 /* skip if FE doesn't have capture capability */ 2355 if (!fe->cpu_dai->driver->capture.channels_min 2356 || !fe->codec_dai->driver->capture.channels_min) 2357 continue; 2358 2359 /* skip if FE isn't currently capturing */ 2360 if (!fe->cpu_dai->capture_active 2361 || !fe->codec_dai->capture_active) 2362 continue; 2363 2364 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2365 if (paths < 0) { 2366 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2367 fe->dai_link->name, "capture"); 2368 mutex_unlock(&card->mutex); 2369 return paths; 2370 } 2371 2372 /* update any new capture paths */ 2373 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1); 2374 if (new) { 2375 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2376 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2377 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2378 } 2379 2380 /* update any old capture paths */ 2381 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0); 2382 if (old) { 2383 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2384 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2385 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2386 } 2387 2388 dpcm_path_put(&list); 2389 } 2390 2391 mutex_unlock(&card->mutex); 2392 return 0; 2393 } 2394 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2395 { 2396 struct snd_soc_dpcm *dpcm; 2397 struct list_head *clients = 2398 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients; 2399 2400 list_for_each_entry(dpcm, clients, list_be) { 2401 2402 struct snd_soc_pcm_runtime *be = dpcm->be; 2403 int i; 2404 2405 if (be->dai_link->ignore_suspend) 2406 continue; 2407 2408 for (i = 0; i < be->num_codecs; i++) { 2409 struct snd_soc_dai *dai = be->codec_dais[i]; 2410 struct snd_soc_dai_driver *drv = dai->driver; 2411 2412 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2413 be->dai_link->name); 2414 2415 if (drv->ops && drv->ops->digital_mute && 2416 dai->playback_active) 2417 drv->ops->digital_mute(dai, mute); 2418 } 2419 } 2420 2421 return 0; 2422 } 2423 2424 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2425 { 2426 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2427 struct snd_soc_dpcm *dpcm; 2428 struct snd_soc_dapm_widget_list *list; 2429 int ret; 2430 int stream = fe_substream->stream; 2431 2432 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2433 fe->dpcm[stream].runtime = fe_substream->runtime; 2434 2435 ret = dpcm_path_get(fe, stream, &list); 2436 if (ret < 0) { 2437 mutex_unlock(&fe->card->mutex); 2438 return ret; 2439 } else if (ret == 0) { 2440 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2441 fe->dai_link->name, stream ? "capture" : "playback"); 2442 } 2443 2444 /* calculate valid and active FE <-> BE dpcms */ 2445 dpcm_process_paths(fe, stream, &list, 1); 2446 2447 ret = dpcm_fe_dai_startup(fe_substream); 2448 if (ret < 0) { 2449 /* clean up all links */ 2450 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2451 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2452 2453 dpcm_be_disconnect(fe, stream); 2454 fe->dpcm[stream].runtime = NULL; 2455 } 2456 2457 dpcm_clear_pending_state(fe, stream); 2458 dpcm_path_put(&list); 2459 mutex_unlock(&fe->card->mutex); 2460 return ret; 2461 } 2462 2463 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2464 { 2465 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2466 struct snd_soc_dpcm *dpcm; 2467 int stream = fe_substream->stream, ret; 2468 2469 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2470 ret = dpcm_fe_dai_shutdown(fe_substream); 2471 2472 /* mark FE's links ready to prune */ 2473 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2474 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2475 2476 dpcm_be_disconnect(fe, stream); 2477 2478 fe->dpcm[stream].runtime = NULL; 2479 mutex_unlock(&fe->card->mutex); 2480 return ret; 2481 } 2482 2483 /* create a new pcm */ 2484 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2485 { 2486 struct snd_soc_platform *platform = rtd->platform; 2487 struct snd_soc_dai *codec_dai; 2488 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2489 struct snd_pcm *pcm; 2490 char new_name[64]; 2491 int ret = 0, playback = 0, capture = 0; 2492 int i; 2493 2494 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2495 playback = rtd->dai_link->dpcm_playback; 2496 capture = rtd->dai_link->dpcm_capture; 2497 } else { 2498 for (i = 0; i < rtd->num_codecs; i++) { 2499 codec_dai = rtd->codec_dais[i]; 2500 if (codec_dai->driver->playback.channels_min) 2501 playback = 1; 2502 if (codec_dai->driver->capture.channels_min) 2503 capture = 1; 2504 } 2505 2506 capture = capture && cpu_dai->driver->capture.channels_min; 2507 playback = playback && cpu_dai->driver->playback.channels_min; 2508 } 2509 2510 if (rtd->dai_link->playback_only) { 2511 playback = 1; 2512 capture = 0; 2513 } 2514 2515 if (rtd->dai_link->capture_only) { 2516 playback = 0; 2517 capture = 1; 2518 } 2519 2520 /* create the PCM */ 2521 if (rtd->dai_link->no_pcm) { 2522 snprintf(new_name, sizeof(new_name), "(%s)", 2523 rtd->dai_link->stream_name); 2524 2525 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2526 playback, capture, &pcm); 2527 } else { 2528 if (rtd->dai_link->dynamic) 2529 snprintf(new_name, sizeof(new_name), "%s (*)", 2530 rtd->dai_link->stream_name); 2531 else 2532 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2533 rtd->dai_link->stream_name, 2534 (rtd->num_codecs > 1) ? 2535 "multicodec" : rtd->codec_dai->name, num); 2536 2537 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2538 capture, &pcm); 2539 } 2540 if (ret < 0) { 2541 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2542 rtd->dai_link->name); 2543 return ret; 2544 } 2545 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2546 2547 /* DAPM dai link stream work */ 2548 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 2549 2550 pcm->nonatomic = rtd->dai_link->nonatomic; 2551 rtd->pcm = pcm; 2552 pcm->private_data = rtd; 2553 2554 if (rtd->dai_link->no_pcm) { 2555 if (playback) 2556 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2557 if (capture) 2558 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2559 goto out; 2560 } 2561 2562 /* ASoC PCM operations */ 2563 if (rtd->dai_link->dynamic) { 2564 rtd->ops.open = dpcm_fe_dai_open; 2565 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2566 rtd->ops.prepare = dpcm_fe_dai_prepare; 2567 rtd->ops.trigger = dpcm_fe_dai_trigger; 2568 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2569 rtd->ops.close = dpcm_fe_dai_close; 2570 rtd->ops.pointer = soc_pcm_pointer; 2571 rtd->ops.ioctl = soc_pcm_ioctl; 2572 } else { 2573 rtd->ops.open = soc_pcm_open; 2574 rtd->ops.hw_params = soc_pcm_hw_params; 2575 rtd->ops.prepare = soc_pcm_prepare; 2576 rtd->ops.trigger = soc_pcm_trigger; 2577 rtd->ops.hw_free = soc_pcm_hw_free; 2578 rtd->ops.close = soc_pcm_close; 2579 rtd->ops.pointer = soc_pcm_pointer; 2580 rtd->ops.ioctl = soc_pcm_ioctl; 2581 } 2582 2583 if (platform->driver->ops) { 2584 rtd->ops.ack = platform->driver->ops->ack; 2585 rtd->ops.copy = platform->driver->ops->copy; 2586 rtd->ops.silence = platform->driver->ops->silence; 2587 rtd->ops.page = platform->driver->ops->page; 2588 rtd->ops.mmap = platform->driver->ops->mmap; 2589 } 2590 2591 if (playback) 2592 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2593 2594 if (capture) 2595 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2596 2597 if (platform->driver->pcm_new) { 2598 ret = platform->driver->pcm_new(rtd); 2599 if (ret < 0) { 2600 dev_err(platform->dev, 2601 "ASoC: pcm constructor failed: %d\n", 2602 ret); 2603 return ret; 2604 } 2605 } 2606 2607 pcm->private_free = platform->driver->pcm_free; 2608 out: 2609 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 2610 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 2611 cpu_dai->name); 2612 return ret; 2613 } 2614 2615 /* is the current PCM operation for this FE ? */ 2616 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2617 { 2618 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2619 return 1; 2620 return 0; 2621 } 2622 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2623 2624 /* is the current PCM operation for this BE ? */ 2625 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2626 struct snd_soc_pcm_runtime *be, int stream) 2627 { 2628 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2629 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2630 be->dpcm[stream].runtime_update)) 2631 return 1; 2632 return 0; 2633 } 2634 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2635 2636 /* get the substream for this BE */ 2637 struct snd_pcm_substream * 2638 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2639 { 2640 return be->pcm->streams[stream].substream; 2641 } 2642 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2643 2644 /* get the BE runtime state */ 2645 enum snd_soc_dpcm_state 2646 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 2647 { 2648 return be->dpcm[stream].state; 2649 } 2650 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 2651 2652 /* set the BE runtime state */ 2653 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 2654 int stream, enum snd_soc_dpcm_state state) 2655 { 2656 be->dpcm[stream].state = state; 2657 } 2658 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 2659 2660 /* 2661 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2662 * are not running, paused or suspended for the specified stream direction. 2663 */ 2664 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2665 struct snd_soc_pcm_runtime *be, int stream) 2666 { 2667 struct snd_soc_dpcm *dpcm; 2668 int state; 2669 2670 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2671 2672 if (dpcm->fe == fe) 2673 continue; 2674 2675 state = dpcm->fe->dpcm[stream].state; 2676 if (state == SND_SOC_DPCM_STATE_START || 2677 state == SND_SOC_DPCM_STATE_PAUSED || 2678 state == SND_SOC_DPCM_STATE_SUSPEND) 2679 return 0; 2680 } 2681 2682 /* it's safe to free/stop this BE DAI */ 2683 return 1; 2684 } 2685 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 2686 2687 /* 2688 * We can only change hw params a BE DAI if any of it's FE are not prepared, 2689 * running, paused or suspended for the specified stream direction. 2690 */ 2691 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 2692 struct snd_soc_pcm_runtime *be, int stream) 2693 { 2694 struct snd_soc_dpcm *dpcm; 2695 int state; 2696 2697 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2698 2699 if (dpcm->fe == fe) 2700 continue; 2701 2702 state = dpcm->fe->dpcm[stream].state; 2703 if (state == SND_SOC_DPCM_STATE_START || 2704 state == SND_SOC_DPCM_STATE_PAUSED || 2705 state == SND_SOC_DPCM_STATE_SUSPEND || 2706 state == SND_SOC_DPCM_STATE_PREPARE) 2707 return 0; 2708 } 2709 2710 /* it's safe to change hw_params */ 2711 return 1; 2712 } 2713 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 2714 2715 int snd_soc_platform_trigger(struct snd_pcm_substream *substream, 2716 int cmd, struct snd_soc_platform *platform) 2717 { 2718 if (platform->driver->ops && platform->driver->ops->trigger) 2719 return platform->driver->ops->trigger(substream, cmd); 2720 return 0; 2721 } 2722 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger); 2723 2724 #ifdef CONFIG_DEBUG_FS 2725 static char *dpcm_state_string(enum snd_soc_dpcm_state state) 2726 { 2727 switch (state) { 2728 case SND_SOC_DPCM_STATE_NEW: 2729 return "new"; 2730 case SND_SOC_DPCM_STATE_OPEN: 2731 return "open"; 2732 case SND_SOC_DPCM_STATE_HW_PARAMS: 2733 return "hw_params"; 2734 case SND_SOC_DPCM_STATE_PREPARE: 2735 return "prepare"; 2736 case SND_SOC_DPCM_STATE_START: 2737 return "start"; 2738 case SND_SOC_DPCM_STATE_STOP: 2739 return "stop"; 2740 case SND_SOC_DPCM_STATE_SUSPEND: 2741 return "suspend"; 2742 case SND_SOC_DPCM_STATE_PAUSED: 2743 return "paused"; 2744 case SND_SOC_DPCM_STATE_HW_FREE: 2745 return "hw_free"; 2746 case SND_SOC_DPCM_STATE_CLOSE: 2747 return "close"; 2748 } 2749 2750 return "unknown"; 2751 } 2752 2753 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 2754 int stream, char *buf, size_t size) 2755 { 2756 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 2757 struct snd_soc_dpcm *dpcm; 2758 ssize_t offset = 0; 2759 2760 /* FE state */ 2761 offset += snprintf(buf + offset, size - offset, 2762 "[%s - %s]\n", fe->dai_link->name, 2763 stream ? "Capture" : "Playback"); 2764 2765 offset += snprintf(buf + offset, size - offset, "State: %s\n", 2766 dpcm_state_string(fe->dpcm[stream].state)); 2767 2768 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2769 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2770 offset += snprintf(buf + offset, size - offset, 2771 "Hardware Params: " 2772 "Format = %s, Channels = %d, Rate = %d\n", 2773 snd_pcm_format_name(params_format(params)), 2774 params_channels(params), 2775 params_rate(params)); 2776 2777 /* BEs state */ 2778 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 2779 2780 if (list_empty(&fe->dpcm[stream].be_clients)) { 2781 offset += snprintf(buf + offset, size - offset, 2782 " No active DSP links\n"); 2783 goto out; 2784 } 2785 2786 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2787 struct snd_soc_pcm_runtime *be = dpcm->be; 2788 params = &dpcm->hw_params; 2789 2790 offset += snprintf(buf + offset, size - offset, 2791 "- %s\n", be->dai_link->name); 2792 2793 offset += snprintf(buf + offset, size - offset, 2794 " State: %s\n", 2795 dpcm_state_string(be->dpcm[stream].state)); 2796 2797 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2798 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2799 offset += snprintf(buf + offset, size - offset, 2800 " Hardware Params: " 2801 "Format = %s, Channels = %d, Rate = %d\n", 2802 snd_pcm_format_name(params_format(params)), 2803 params_channels(params), 2804 params_rate(params)); 2805 } 2806 2807 out: 2808 return offset; 2809 } 2810 2811 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 2812 size_t count, loff_t *ppos) 2813 { 2814 struct snd_soc_pcm_runtime *fe = file->private_data; 2815 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 2816 char *buf; 2817 2818 buf = kmalloc(out_count, GFP_KERNEL); 2819 if (!buf) 2820 return -ENOMEM; 2821 2822 if (fe->cpu_dai->driver->playback.channels_min) 2823 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 2824 buf + offset, out_count - offset); 2825 2826 if (fe->cpu_dai->driver->capture.channels_min) 2827 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 2828 buf + offset, out_count - offset); 2829 2830 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 2831 2832 kfree(buf); 2833 return ret; 2834 } 2835 2836 static const struct file_operations dpcm_state_fops = { 2837 .open = simple_open, 2838 .read = dpcm_state_read_file, 2839 .llseek = default_llseek, 2840 }; 2841 2842 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 2843 { 2844 if (!rtd->dai_link) 2845 return; 2846 2847 if (!rtd->card->debugfs_card_root) 2848 return; 2849 2850 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 2851 rtd->card->debugfs_card_root); 2852 if (!rtd->debugfs_dpcm_root) { 2853 dev_dbg(rtd->dev, 2854 "ASoC: Failed to create dpcm debugfs directory %s\n", 2855 rtd->dai_link->name); 2856 return; 2857 } 2858 2859 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444, 2860 rtd->debugfs_dpcm_root, 2861 rtd, &dpcm_state_fops); 2862 } 2863 #endif 2864