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 */ 47void 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 */ 82void 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 */ 116bool 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 */ 137int 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} 151EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 152 153/* DPCM stream event, send event to FE and all active BEs. */ 154int 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 174static 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 233static 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 284static 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 304static 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 318static 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 352static 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 */ 418static 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 542dynamic: 543 544 snd_soc_runtime_activate(rtd, substream->stream); 545 546 mutex_unlock(&rtd->pcm_mutex); 547 return 0; 548 549config_err: 550 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) 551 rtd->dai_link->ops->shutdown(substream); 552 553machine_err: 554 i = rtd->num_codecs; 555 556codec_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 566platform_err: 567 if (cpu_dai->driver->ops->shutdown) 568 cpu_dai->driver->ops->shutdown(substream, cpu_dai); 569out: 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 */ 591static 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 */ 619static 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 */ 698static 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 764out: 765 mutex_unlock(&rtd->pcm_mutex); 766 return ret; 767} 768 769static 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 780int 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 */ 803static 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 870out: 871 mutex_unlock(&rtd->pcm_mutex); 872 return ret; 873 874platform_err: 875 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free) 876 cpu_dai->driver->ops->hw_free(substream, cpu_dai); 877 878interface_err: 879 i = rtd->num_codecs; 880 881codec_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 */ 899static 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 956static 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 995static 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 */ 1033static 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 */ 1073static 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 */ 1108static 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 */ 1136void 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 */ 1165static 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 1211static 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 1220static 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 1233int 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 1255static 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 1296static 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 */ 1353int 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 1362void 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 1371static 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 1400int 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 1458unwind: 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 1487static 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 1501static 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 1514static 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 */ 1521static 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 1537static 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 1568unwind: 1569 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1570be_err: 1571 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1572 return ret; 1573} 1574 1575int 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 1613static 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 1636int 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 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1666 continue; 1667 1668 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1669 dpcm->fe->dai_link->name); 1670 1671 soc_pcm_hw_free(be_substream); 1672 1673 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1674 } 1675 1676 return 0; 1677} 1678 1679static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1680{ 1681 struct snd_soc_pcm_runtime *fe = substream->private_data; 1682 int err, stream = substream->stream; 1683 1684 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1685 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1686 1687 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1688 1689 /* call hw_free on the frontend */ 1690 err = soc_pcm_hw_free(substream); 1691 if (err < 0) 1692 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 1693 fe->dai_link->name); 1694 1695 /* only hw_params backends that are either sinks or sources 1696 * to this frontend DAI */ 1697 err = dpcm_be_dai_hw_free(fe, stream); 1698 1699 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1700 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1701 1702 mutex_unlock(&fe->card->mutex); 1703 return 0; 1704} 1705 1706int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1707{ 1708 struct snd_soc_dpcm *dpcm; 1709 int ret; 1710 1711 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1712 1713 struct snd_soc_pcm_runtime *be = dpcm->be; 1714 struct snd_pcm_substream *be_substream = 1715 snd_soc_dpcm_get_substream(be, stream); 1716 1717 /* is this op for this BE ? */ 1718 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1719 continue; 1720 1721 /* only allow hw_params() if no connected FEs are running */ 1722 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 1723 continue; 1724 1725 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1726 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1727 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 1728 continue; 1729 1730 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 1731 dpcm->fe->dai_link->name); 1732 1733 /* copy params for each dpcm */ 1734 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1735 sizeof(struct snd_pcm_hw_params)); 1736 1737 /* perform any hw_params fixups */ 1738 if (be->dai_link->be_hw_params_fixup) { 1739 ret = be->dai_link->be_hw_params_fixup(be, 1740 &dpcm->hw_params); 1741 if (ret < 0) { 1742 dev_err(be->dev, 1743 "ASoC: hw_params BE fixup failed %d\n", 1744 ret); 1745 goto unwind; 1746 } 1747 } 1748 1749 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 1750 if (ret < 0) { 1751 dev_err(dpcm->be->dev, 1752 "ASoC: hw_params BE failed %d\n", ret); 1753 goto unwind; 1754 } 1755 1756 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1757 } 1758 return 0; 1759 1760unwind: 1761 /* disable any enabled and non active backends */ 1762 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1763 struct snd_soc_pcm_runtime *be = dpcm->be; 1764 struct snd_pcm_substream *be_substream = 1765 snd_soc_dpcm_get_substream(be, stream); 1766 1767 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1768 continue; 1769 1770 /* only allow hw_free() if no connected FEs are running */ 1771 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1772 continue; 1773 1774 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1775 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1776 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1777 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1778 continue; 1779 1780 soc_pcm_hw_free(be_substream); 1781 } 1782 1783 return ret; 1784} 1785 1786static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 1787 struct snd_pcm_hw_params *params) 1788{ 1789 struct snd_soc_pcm_runtime *fe = substream->private_data; 1790 int ret, stream = substream->stream; 1791 1792 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1793 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1794 1795 memcpy(&fe->dpcm[substream->stream].hw_params, params, 1796 sizeof(struct snd_pcm_hw_params)); 1797 ret = dpcm_be_dai_hw_params(fe, substream->stream); 1798 if (ret < 0) { 1799 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 1800 goto out; 1801 } 1802 1803 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 1804 fe->dai_link->name, params_rate(params), 1805 params_channels(params), params_format(params)); 1806 1807 /* call hw_params on the frontend */ 1808 ret = soc_pcm_hw_params(substream, params); 1809 if (ret < 0) { 1810 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 1811 dpcm_be_dai_hw_free(fe, stream); 1812 } else 1813 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1814 1815out: 1816 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1817 mutex_unlock(&fe->card->mutex); 1818 return ret; 1819} 1820 1821static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 1822 struct snd_pcm_substream *substream, int cmd) 1823{ 1824 int ret; 1825 1826 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 1827 dpcm->fe->dai_link->name, cmd); 1828 1829 ret = soc_pcm_trigger(substream, cmd); 1830 if (ret < 0) 1831 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 1832 1833 return ret; 1834} 1835 1836int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 1837 int cmd) 1838{ 1839 struct snd_soc_dpcm *dpcm; 1840 int ret = 0; 1841 1842 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1843 1844 struct snd_soc_pcm_runtime *be = dpcm->be; 1845 struct snd_pcm_substream *be_substream = 1846 snd_soc_dpcm_get_substream(be, stream); 1847 1848 /* is this op for this BE ? */ 1849 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1850 continue; 1851 1852 switch (cmd) { 1853 case SNDRV_PCM_TRIGGER_START: 1854 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1855 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1856 continue; 1857 1858 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1859 if (ret) 1860 return ret; 1861 1862 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1863 break; 1864 case SNDRV_PCM_TRIGGER_RESUME: 1865 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1866 continue; 1867 1868 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1869 if (ret) 1870 return ret; 1871 1872 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1873 break; 1874 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1875 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 1876 continue; 1877 1878 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1879 if (ret) 1880 return ret; 1881 1882 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1883 break; 1884 case SNDRV_PCM_TRIGGER_STOP: 1885 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1886 continue; 1887 1888 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1889 continue; 1890 1891 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1892 if (ret) 1893 return ret; 1894 1895 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 1896 break; 1897 case SNDRV_PCM_TRIGGER_SUSPEND: 1898 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1899 continue; 1900 1901 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1902 continue; 1903 1904 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1905 if (ret) 1906 return ret; 1907 1908 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 1909 break; 1910 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1911 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 1912 continue; 1913 1914 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1915 continue; 1916 1917 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 1918 if (ret) 1919 return ret; 1920 1921 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 1922 break; 1923 } 1924 } 1925 1926 return ret; 1927} 1928EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 1929 1930static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 1931{ 1932 struct snd_soc_pcm_runtime *fe = substream->private_data; 1933 int stream = substream->stream, ret; 1934 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 1935 1936 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 1937 1938 switch (trigger) { 1939 case SND_SOC_DPCM_TRIGGER_PRE: 1940 /* call trigger on the frontend before the backend. */ 1941 1942 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 1943 fe->dai_link->name, cmd); 1944 1945 ret = soc_pcm_trigger(substream, cmd); 1946 if (ret < 0) { 1947 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1948 goto out; 1949 } 1950 1951 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1952 break; 1953 case SND_SOC_DPCM_TRIGGER_POST: 1954 /* call trigger on the frontend after the backend. */ 1955 1956 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 1957 if (ret < 0) { 1958 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1959 goto out; 1960 } 1961 1962 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 1963 fe->dai_link->name, cmd); 1964 1965 ret = soc_pcm_trigger(substream, cmd); 1966 break; 1967 case SND_SOC_DPCM_TRIGGER_BESPOKE: 1968 /* bespoke trigger() - handles both FE and BEs */ 1969 1970 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 1971 fe->dai_link->name, cmd); 1972 1973 ret = soc_pcm_bespoke_trigger(substream, cmd); 1974 if (ret < 0) { 1975 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 1976 goto out; 1977 } 1978 break; 1979 default: 1980 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 1981 fe->dai_link->name); 1982 ret = -EINVAL; 1983 goto out; 1984 } 1985 1986 switch (cmd) { 1987 case SNDRV_PCM_TRIGGER_START: 1988 case SNDRV_PCM_TRIGGER_RESUME: 1989 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1990 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 1991 break; 1992 case SNDRV_PCM_TRIGGER_STOP: 1993 case SNDRV_PCM_TRIGGER_SUSPEND: 1994 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1995 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 1996 break; 1997 } 1998 1999out: 2000 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2001 return ret; 2002} 2003 2004static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2005{ 2006 struct snd_soc_pcm_runtime *fe = substream->private_data; 2007 int stream = substream->stream; 2008 2009 /* if FE's runtime_update is already set, we're in race; 2010 * process this trigger later at exit 2011 */ 2012 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2013 fe->dpcm[stream].trigger_pending = cmd + 1; 2014 return 0; /* delayed, assuming it's successful */ 2015 } 2016 2017 /* we're alone, let's trigger */ 2018 return dpcm_fe_dai_do_trigger(substream, cmd); 2019} 2020 2021int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2022{ 2023 struct snd_soc_dpcm *dpcm; 2024 int ret = 0; 2025 2026 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2027 2028 struct snd_soc_pcm_runtime *be = dpcm->be; 2029 struct snd_pcm_substream *be_substream = 2030 snd_soc_dpcm_get_substream(be, stream); 2031 2032 /* is this op for this BE ? */ 2033 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2034 continue; 2035 2036 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2037 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2038 continue; 2039 2040 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2041 dpcm->fe->dai_link->name); 2042 2043 ret = soc_pcm_prepare(be_substream); 2044 if (ret < 0) { 2045 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2046 ret); 2047 break; 2048 } 2049 2050 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2051 } 2052 return ret; 2053} 2054 2055static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2056{ 2057 struct snd_soc_pcm_runtime *fe = substream->private_data; 2058 int stream = substream->stream, ret = 0; 2059 2060 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2061 2062 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2063 2064 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2065 2066 /* there is no point preparing this FE if there are no BEs */ 2067 if (list_empty(&fe->dpcm[stream].be_clients)) { 2068 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2069 fe->dai_link->name); 2070 ret = -EINVAL; 2071 goto out; 2072 } 2073 2074 ret = dpcm_be_dai_prepare(fe, substream->stream); 2075 if (ret < 0) 2076 goto out; 2077 2078 /* call prepare on the frontend */ 2079 ret = soc_pcm_prepare(substream); 2080 if (ret < 0) { 2081 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2082 fe->dai_link->name); 2083 goto out; 2084 } 2085 2086 /* run the stream event for each BE */ 2087 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2088 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2089 2090out: 2091 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2092 mutex_unlock(&fe->card->mutex); 2093 2094 return ret; 2095} 2096 2097static int soc_pcm_ioctl(struct snd_pcm_substream *substream, 2098 unsigned int cmd, void *arg) 2099{ 2100 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2101 struct snd_soc_platform *platform = rtd->platform; 2102 2103 if (platform->driver->ops && platform->driver->ops->ioctl) 2104 return platform->driver->ops->ioctl(substream, cmd, arg); 2105 return snd_pcm_lib_ioctl(substream, cmd, arg); 2106} 2107 2108static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2109{ 2110 struct snd_pcm_substream *substream = 2111 snd_soc_dpcm_get_substream(fe, stream); 2112 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2113 int err; 2114 2115 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2116 stream ? "capture" : "playback", fe->dai_link->name); 2117 2118 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2119 /* call bespoke trigger - FE takes care of all BE triggers */ 2120 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2121 fe->dai_link->name); 2122 2123 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2124 if (err < 0) 2125 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2126 } else { 2127 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2128 fe->dai_link->name); 2129 2130 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2131 if (err < 0) 2132 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2133 } 2134 2135 err = dpcm_be_dai_hw_free(fe, stream); 2136 if (err < 0) 2137 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2138 2139 err = dpcm_be_dai_shutdown(fe, stream); 2140 if (err < 0) 2141 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2142 2143 /* run the stream event for each BE */ 2144 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2145 2146 return 0; 2147} 2148 2149static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2150{ 2151 struct snd_pcm_substream *substream = 2152 snd_soc_dpcm_get_substream(fe, stream); 2153 struct snd_soc_dpcm *dpcm; 2154 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2155 int ret; 2156 2157 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2158 stream ? "capture" : "playback", fe->dai_link->name); 2159 2160 /* Only start the BE if the FE is ready */ 2161 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2162 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2163 return -EINVAL; 2164 2165 /* startup must always be called for new BEs */ 2166 ret = dpcm_be_dai_startup(fe, stream); 2167 if (ret < 0) 2168 goto disconnect; 2169 2170 /* keep going if FE state is > open */ 2171 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2172 return 0; 2173 2174 ret = dpcm_be_dai_hw_params(fe, stream); 2175 if (ret < 0) 2176 goto close; 2177 2178 /* keep going if FE state is > hw_params */ 2179 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2180 return 0; 2181 2182 2183 ret = dpcm_be_dai_prepare(fe, stream); 2184 if (ret < 0) 2185 goto hw_free; 2186 2187 /* run the stream event for each BE */ 2188 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2189 2190 /* keep going if FE state is > prepare */ 2191 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2192 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2193 return 0; 2194 2195 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2196 /* call trigger on the frontend - FE takes care of all BE triggers */ 2197 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2198 fe->dai_link->name); 2199 2200 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2201 if (ret < 0) { 2202 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2203 goto hw_free; 2204 } 2205 } else { 2206 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2207 fe->dai_link->name); 2208 2209 ret = dpcm_be_dai_trigger(fe, stream, 2210 SNDRV_PCM_TRIGGER_START); 2211 if (ret < 0) { 2212 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2213 goto hw_free; 2214 } 2215 } 2216 2217 return 0; 2218 2219hw_free: 2220 dpcm_be_dai_hw_free(fe, stream); 2221close: 2222 dpcm_be_dai_shutdown(fe, stream); 2223disconnect: 2224 /* disconnect any non started BEs */ 2225 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2226 struct snd_soc_pcm_runtime *be = dpcm->be; 2227 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2228 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2229 } 2230 2231 return ret; 2232} 2233 2234static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2235{ 2236 int ret; 2237 2238 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2239 ret = dpcm_run_update_startup(fe, stream); 2240 if (ret < 0) 2241 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2242 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2243 2244 return ret; 2245} 2246 2247static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2248{ 2249 int ret; 2250 2251 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2252 ret = dpcm_run_update_shutdown(fe, stream); 2253 if (ret < 0) 2254 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2255 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2256 2257 return ret; 2258} 2259 2260/* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2261 * any DAI links. 2262 */ 2263int soc_dpcm_runtime_update(struct snd_soc_card *card) 2264{ 2265 int i, old, new, paths; 2266 2267 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2268 for (i = 0; i < card->num_rtd; i++) { 2269 struct snd_soc_dapm_widget_list *list; 2270 struct snd_soc_pcm_runtime *fe = &card->rtd[i]; 2271 2272 /* make sure link is FE */ 2273 if (!fe->dai_link->dynamic) 2274 continue; 2275 2276 /* only check active links */ 2277 if (!fe->cpu_dai->active) 2278 continue; 2279 2280 /* DAPM sync will call this to update DSP paths */ 2281 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n", 2282 fe->dai_link->name); 2283 2284 /* skip if FE doesn't have playback capability */ 2285 if (!fe->cpu_dai->driver->playback.channels_min 2286 || !fe->codec_dai->driver->playback.channels_min) 2287 goto capture; 2288 2289 /* skip if FE isn't currently playing */ 2290 if (!fe->cpu_dai->playback_active 2291 || !fe->codec_dai->playback_active) 2292 goto capture; 2293 2294 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2295 if (paths < 0) { 2296 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2297 fe->dai_link->name, "playback"); 2298 mutex_unlock(&card->mutex); 2299 return paths; 2300 } 2301 2302 /* update any new playback paths */ 2303 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1); 2304 if (new) { 2305 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2306 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2307 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2308 } 2309 2310 /* update any old playback paths */ 2311 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0); 2312 if (old) { 2313 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2314 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2315 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2316 } 2317 2318 dpcm_path_put(&list); 2319capture: 2320 /* skip if FE doesn't have capture capability */ 2321 if (!fe->cpu_dai->driver->capture.channels_min 2322 || !fe->codec_dai->driver->capture.channels_min) 2323 continue; 2324 2325 /* skip if FE isn't currently capturing */ 2326 if (!fe->cpu_dai->capture_active 2327 || !fe->codec_dai->capture_active) 2328 continue; 2329 2330 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2331 if (paths < 0) { 2332 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2333 fe->dai_link->name, "capture"); 2334 mutex_unlock(&card->mutex); 2335 return paths; 2336 } 2337 2338 /* update any new capture paths */ 2339 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1); 2340 if (new) { 2341 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2342 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2343 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2344 } 2345 2346 /* update any old capture paths */ 2347 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0); 2348 if (old) { 2349 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2350 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2351 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2352 } 2353 2354 dpcm_path_put(&list); 2355 } 2356 2357 mutex_unlock(&card->mutex); 2358 return 0; 2359} 2360int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2361{ 2362 struct snd_soc_dpcm *dpcm; 2363 struct list_head *clients = 2364 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients; 2365 2366 list_for_each_entry(dpcm, clients, list_be) { 2367 2368 struct snd_soc_pcm_runtime *be = dpcm->be; 2369 int i; 2370 2371 if (be->dai_link->ignore_suspend) 2372 continue; 2373 2374 for (i = 0; i < be->num_codecs; i++) { 2375 struct snd_soc_dai *dai = be->codec_dais[i]; 2376 struct snd_soc_dai_driver *drv = dai->driver; 2377 2378 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2379 be->dai_link->name); 2380 2381 if (drv->ops && drv->ops->digital_mute && 2382 dai->playback_active) 2383 drv->ops->digital_mute(dai, mute); 2384 } 2385 } 2386 2387 return 0; 2388} 2389 2390static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2391{ 2392 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2393 struct snd_soc_dpcm *dpcm; 2394 struct snd_soc_dapm_widget_list *list; 2395 int ret; 2396 int stream = fe_substream->stream; 2397 2398 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2399 fe->dpcm[stream].runtime = fe_substream->runtime; 2400 2401 ret = dpcm_path_get(fe, stream, &list); 2402 if (ret < 0) { 2403 mutex_unlock(&fe->card->mutex); 2404 return ret; 2405 } else if (ret == 0) { 2406 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2407 fe->dai_link->name, stream ? "capture" : "playback"); 2408 } 2409 2410 /* calculate valid and active FE <-> BE dpcms */ 2411 dpcm_process_paths(fe, stream, &list, 1); 2412 2413 ret = dpcm_fe_dai_startup(fe_substream); 2414 if (ret < 0) { 2415 /* clean up all links */ 2416 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2417 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2418 2419 dpcm_be_disconnect(fe, stream); 2420 fe->dpcm[stream].runtime = NULL; 2421 } 2422 2423 dpcm_clear_pending_state(fe, stream); 2424 dpcm_path_put(&list); 2425 mutex_unlock(&fe->card->mutex); 2426 return ret; 2427} 2428 2429static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2430{ 2431 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2432 struct snd_soc_dpcm *dpcm; 2433 int stream = fe_substream->stream, ret; 2434 2435 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2436 ret = dpcm_fe_dai_shutdown(fe_substream); 2437 2438 /* mark FE's links ready to prune */ 2439 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2440 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2441 2442 dpcm_be_disconnect(fe, stream); 2443 2444 fe->dpcm[stream].runtime = NULL; 2445 mutex_unlock(&fe->card->mutex); 2446 return ret; 2447} 2448 2449/* create a new pcm */ 2450int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2451{ 2452 struct snd_soc_platform *platform = rtd->platform; 2453 struct snd_soc_dai *codec_dai; 2454 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2455 struct snd_pcm *pcm; 2456 char new_name[64]; 2457 int ret = 0, playback = 0, capture = 0; 2458 int i; 2459 2460 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2461 playback = rtd->dai_link->dpcm_playback; 2462 capture = rtd->dai_link->dpcm_capture; 2463 } else { 2464 for (i = 0; i < rtd->num_codecs; i++) { 2465 codec_dai = rtd->codec_dais[i]; 2466 if (codec_dai->driver->playback.channels_min) 2467 playback = 1; 2468 if (codec_dai->driver->capture.channels_min) 2469 capture = 1; 2470 } 2471 2472 capture = capture && cpu_dai->driver->capture.channels_min; 2473 playback = playback && cpu_dai->driver->playback.channels_min; 2474 } 2475 2476 if (rtd->dai_link->playback_only) { 2477 playback = 1; 2478 capture = 0; 2479 } 2480 2481 if (rtd->dai_link->capture_only) { 2482 playback = 0; 2483 capture = 1; 2484 } 2485 2486 /* create the PCM */ 2487 if (rtd->dai_link->no_pcm) { 2488 snprintf(new_name, sizeof(new_name), "(%s)", 2489 rtd->dai_link->stream_name); 2490 2491 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2492 playback, capture, &pcm); 2493 } else { 2494 if (rtd->dai_link->dynamic) 2495 snprintf(new_name, sizeof(new_name), "%s (*)", 2496 rtd->dai_link->stream_name); 2497 else 2498 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2499 rtd->dai_link->stream_name, 2500 (rtd->num_codecs > 1) ? 2501 "multicodec" : rtd->codec_dai->name, num); 2502 2503 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2504 capture, &pcm); 2505 } 2506 if (ret < 0) { 2507 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2508 rtd->dai_link->name); 2509 return ret; 2510 } 2511 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2512 2513 /* DAPM dai link stream work */ 2514 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 2515 2516 pcm->nonatomic = rtd->dai_link->nonatomic; 2517 rtd->pcm = pcm; 2518 pcm->private_data = rtd; 2519 2520 if (rtd->dai_link->no_pcm) { 2521 if (playback) 2522 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2523 if (capture) 2524 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2525 goto out; 2526 } 2527 2528 /* ASoC PCM operations */ 2529 if (rtd->dai_link->dynamic) { 2530 rtd->ops.open = dpcm_fe_dai_open; 2531 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2532 rtd->ops.prepare = dpcm_fe_dai_prepare; 2533 rtd->ops.trigger = dpcm_fe_dai_trigger; 2534 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2535 rtd->ops.close = dpcm_fe_dai_close; 2536 rtd->ops.pointer = soc_pcm_pointer; 2537 rtd->ops.ioctl = soc_pcm_ioctl; 2538 } else { 2539 rtd->ops.open = soc_pcm_open; 2540 rtd->ops.hw_params = soc_pcm_hw_params; 2541 rtd->ops.prepare = soc_pcm_prepare; 2542 rtd->ops.trigger = soc_pcm_trigger; 2543 rtd->ops.hw_free = soc_pcm_hw_free; 2544 rtd->ops.close = soc_pcm_close; 2545 rtd->ops.pointer = soc_pcm_pointer; 2546 rtd->ops.ioctl = soc_pcm_ioctl; 2547 } 2548 2549 if (platform->driver->ops) { 2550 rtd->ops.ack = platform->driver->ops->ack; 2551 rtd->ops.copy = platform->driver->ops->copy; 2552 rtd->ops.silence = platform->driver->ops->silence; 2553 rtd->ops.page = platform->driver->ops->page; 2554 rtd->ops.mmap = platform->driver->ops->mmap; 2555 } 2556 2557 if (playback) 2558 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2559 2560 if (capture) 2561 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2562 2563 if (platform->driver->pcm_new) { 2564 ret = platform->driver->pcm_new(rtd); 2565 if (ret < 0) { 2566 dev_err(platform->dev, 2567 "ASoC: pcm constructor failed: %d\n", 2568 ret); 2569 return ret; 2570 } 2571 } 2572 2573 pcm->private_free = platform->driver->pcm_free; 2574out: 2575 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 2576 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 2577 cpu_dai->name); 2578 return ret; 2579} 2580 2581/* is the current PCM operation for this FE ? */ 2582int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2583{ 2584 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2585 return 1; 2586 return 0; 2587} 2588EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2589 2590/* is the current PCM operation for this BE ? */ 2591int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2592 struct snd_soc_pcm_runtime *be, int stream) 2593{ 2594 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2595 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2596 be->dpcm[stream].runtime_update)) 2597 return 1; 2598 return 0; 2599} 2600EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2601 2602/* get the substream for this BE */ 2603struct snd_pcm_substream * 2604 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2605{ 2606 return be->pcm->streams[stream].substream; 2607} 2608EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2609 2610/* get the BE runtime state */ 2611enum snd_soc_dpcm_state 2612 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 2613{ 2614 return be->dpcm[stream].state; 2615} 2616EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 2617 2618/* set the BE runtime state */ 2619void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 2620 int stream, enum snd_soc_dpcm_state state) 2621{ 2622 be->dpcm[stream].state = state; 2623} 2624EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 2625 2626/* 2627 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2628 * are not running, paused or suspended for the specified stream direction. 2629 */ 2630int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2631 struct snd_soc_pcm_runtime *be, int stream) 2632{ 2633 struct snd_soc_dpcm *dpcm; 2634 int state; 2635 2636 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2637 2638 if (dpcm->fe == fe) 2639 continue; 2640 2641 state = dpcm->fe->dpcm[stream].state; 2642 if (state == SND_SOC_DPCM_STATE_START || 2643 state == SND_SOC_DPCM_STATE_PAUSED || 2644 state == SND_SOC_DPCM_STATE_SUSPEND) 2645 return 0; 2646 } 2647 2648 /* it's safe to free/stop this BE DAI */ 2649 return 1; 2650} 2651EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 2652 2653/* 2654 * We can only change hw params a BE DAI if any of it's FE are not prepared, 2655 * running, paused or suspended for the specified stream direction. 2656 */ 2657int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 2658 struct snd_soc_pcm_runtime *be, int stream) 2659{ 2660 struct snd_soc_dpcm *dpcm; 2661 int state; 2662 2663 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2664 2665 if (dpcm->fe == fe) 2666 continue; 2667 2668 state = dpcm->fe->dpcm[stream].state; 2669 if (state == SND_SOC_DPCM_STATE_START || 2670 state == SND_SOC_DPCM_STATE_PAUSED || 2671 state == SND_SOC_DPCM_STATE_SUSPEND || 2672 state == SND_SOC_DPCM_STATE_PREPARE) 2673 return 0; 2674 } 2675 2676 /* it's safe to change hw_params */ 2677 return 1; 2678} 2679EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 2680 2681int snd_soc_platform_trigger(struct snd_pcm_substream *substream, 2682 int cmd, struct snd_soc_platform *platform) 2683{ 2684 if (platform->driver->ops && platform->driver->ops->trigger) 2685 return platform->driver->ops->trigger(substream, cmd); 2686 return 0; 2687} 2688EXPORT_SYMBOL_GPL(snd_soc_platform_trigger); 2689 2690#ifdef CONFIG_DEBUG_FS 2691static char *dpcm_state_string(enum snd_soc_dpcm_state state) 2692{ 2693 switch (state) { 2694 case SND_SOC_DPCM_STATE_NEW: 2695 return "new"; 2696 case SND_SOC_DPCM_STATE_OPEN: 2697 return "open"; 2698 case SND_SOC_DPCM_STATE_HW_PARAMS: 2699 return "hw_params"; 2700 case SND_SOC_DPCM_STATE_PREPARE: 2701 return "prepare"; 2702 case SND_SOC_DPCM_STATE_START: 2703 return "start"; 2704 case SND_SOC_DPCM_STATE_STOP: 2705 return "stop"; 2706 case SND_SOC_DPCM_STATE_SUSPEND: 2707 return "suspend"; 2708 case SND_SOC_DPCM_STATE_PAUSED: 2709 return "paused"; 2710 case SND_SOC_DPCM_STATE_HW_FREE: 2711 return "hw_free"; 2712 case SND_SOC_DPCM_STATE_CLOSE: 2713 return "close"; 2714 } 2715 2716 return "unknown"; 2717} 2718 2719static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 2720 int stream, char *buf, size_t size) 2721{ 2722 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 2723 struct snd_soc_dpcm *dpcm; 2724 ssize_t offset = 0; 2725 2726 /* FE state */ 2727 offset += snprintf(buf + offset, size - offset, 2728 "[%s - %s]\n", fe->dai_link->name, 2729 stream ? "Capture" : "Playback"); 2730 2731 offset += snprintf(buf + offset, size - offset, "State: %s\n", 2732 dpcm_state_string(fe->dpcm[stream].state)); 2733 2734 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2735 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2736 offset += snprintf(buf + offset, size - offset, 2737 "Hardware Params: " 2738 "Format = %s, Channels = %d, Rate = %d\n", 2739 snd_pcm_format_name(params_format(params)), 2740 params_channels(params), 2741 params_rate(params)); 2742 2743 /* BEs state */ 2744 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 2745 2746 if (list_empty(&fe->dpcm[stream].be_clients)) { 2747 offset += snprintf(buf + offset, size - offset, 2748 " No active DSP links\n"); 2749 goto out; 2750 } 2751 2752 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2753 struct snd_soc_pcm_runtime *be = dpcm->be; 2754 params = &dpcm->hw_params; 2755 2756 offset += snprintf(buf + offset, size - offset, 2757 "- %s\n", be->dai_link->name); 2758 2759 offset += snprintf(buf + offset, size - offset, 2760 " State: %s\n", 2761 dpcm_state_string(be->dpcm[stream].state)); 2762 2763 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2764 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2765 offset += snprintf(buf + offset, size - offset, 2766 " Hardware Params: " 2767 "Format = %s, Channels = %d, Rate = %d\n", 2768 snd_pcm_format_name(params_format(params)), 2769 params_channels(params), 2770 params_rate(params)); 2771 } 2772 2773out: 2774 return offset; 2775} 2776 2777static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 2778 size_t count, loff_t *ppos) 2779{ 2780 struct snd_soc_pcm_runtime *fe = file->private_data; 2781 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 2782 char *buf; 2783 2784 buf = kmalloc(out_count, GFP_KERNEL); 2785 if (!buf) 2786 return -ENOMEM; 2787 2788 if (fe->cpu_dai->driver->playback.channels_min) 2789 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 2790 buf + offset, out_count - offset); 2791 2792 if (fe->cpu_dai->driver->capture.channels_min) 2793 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 2794 buf + offset, out_count - offset); 2795 2796 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 2797 2798 kfree(buf); 2799 return ret; 2800} 2801 2802static const struct file_operations dpcm_state_fops = { 2803 .open = simple_open, 2804 .read = dpcm_state_read_file, 2805 .llseek = default_llseek, 2806}; 2807 2808void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 2809{ 2810 if (!rtd->dai_link) 2811 return; 2812 2813 if (!rtd->card->debugfs_card_root) 2814 return; 2815 2816 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 2817 rtd->card->debugfs_card_root); 2818 if (!rtd->debugfs_dpcm_root) { 2819 dev_dbg(rtd->dev, 2820 "ASoC: Failed to create dpcm debugfs directory %s\n", 2821 rtd->dai_link->name); 2822 return; 2823 } 2824 2825 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444, 2826 rtd->debugfs_dpcm_root, 2827 rtd, &dpcm_state_fops); 2828} 2829#endif 2830