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