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_dai_stream_valid() - check if a DAI supports the given stream 39 * 40 * Returns true if the DAI supports the indicated stream type. 41 */ 42 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream) 43 { 44 struct snd_soc_pcm_stream *codec_stream; 45 46 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 47 codec_stream = &dai->driver->playback; 48 else 49 codec_stream = &dai->driver->capture; 50 51 /* If the codec specifies any rate at all, it supports the stream. */ 52 return codec_stream->rates; 53 } 54 55 /** 56 * snd_soc_runtime_activate() - Increment active count for PCM runtime components 57 * @rtd: ASoC PCM runtime that is activated 58 * @stream: Direction of the PCM stream 59 * 60 * Increments the active count for all the DAIs and components attached to a PCM 61 * runtime. Should typically be called when a stream is opened. 62 * 63 * Must be called with the rtd->pcm_mutex being held 64 */ 65 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream) 66 { 67 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 68 int i; 69 70 lockdep_assert_held(&rtd->pcm_mutex); 71 72 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 73 cpu_dai->playback_active++; 74 for (i = 0; i < rtd->num_codecs; i++) 75 rtd->codec_dais[i]->playback_active++; 76 } else { 77 cpu_dai->capture_active++; 78 for (i = 0; i < rtd->num_codecs; i++) 79 rtd->codec_dais[i]->capture_active++; 80 } 81 82 cpu_dai->active++; 83 cpu_dai->component->active++; 84 for (i = 0; i < rtd->num_codecs; i++) { 85 rtd->codec_dais[i]->active++; 86 rtd->codec_dais[i]->component->active++; 87 } 88 } 89 90 /** 91 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components 92 * @rtd: ASoC PCM runtime that is deactivated 93 * @stream: Direction of the PCM stream 94 * 95 * Decrements the active count for all the DAIs and components attached to a PCM 96 * runtime. Should typically be called when a stream is closed. 97 * 98 * Must be called with the rtd->pcm_mutex being held 99 */ 100 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream) 101 { 102 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 103 int i; 104 105 lockdep_assert_held(&rtd->pcm_mutex); 106 107 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 108 cpu_dai->playback_active--; 109 for (i = 0; i < rtd->num_codecs; i++) 110 rtd->codec_dais[i]->playback_active--; 111 } else { 112 cpu_dai->capture_active--; 113 for (i = 0; i < rtd->num_codecs; i++) 114 rtd->codec_dais[i]->capture_active--; 115 } 116 117 cpu_dai->active--; 118 cpu_dai->component->active--; 119 for (i = 0; i < rtd->num_codecs; i++) { 120 rtd->codec_dais[i]->component->active--; 121 rtd->codec_dais[i]->active--; 122 } 123 } 124 125 /** 126 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 127 * @rtd: The ASoC PCM runtime that should be checked. 128 * 129 * This function checks whether the power down delay should be ignored for a 130 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 131 * been configured to ignore the delay, or if none of the components benefits 132 * from having the delay. 133 */ 134 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 135 { 136 int i; 137 bool ignore = true; 138 139 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 140 return true; 141 142 for (i = 0; i < rtd->num_codecs; i++) 143 ignore &= rtd->codec_dais[i]->component->ignore_pmdown_time; 144 145 return rtd->cpu_dai->component->ignore_pmdown_time && ignore; 146 } 147 148 /** 149 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 150 * @substream: the pcm substream 151 * @hw: the hardware parameters 152 * 153 * Sets the substream runtime hardware parameters. 154 */ 155 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 156 const struct snd_pcm_hardware *hw) 157 { 158 struct snd_pcm_runtime *runtime = substream->runtime; 159 runtime->hw.info = hw->info; 160 runtime->hw.formats = hw->formats; 161 runtime->hw.period_bytes_min = hw->period_bytes_min; 162 runtime->hw.period_bytes_max = hw->period_bytes_max; 163 runtime->hw.periods_min = hw->periods_min; 164 runtime->hw.periods_max = hw->periods_max; 165 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; 166 runtime->hw.fifo_size = hw->fifo_size; 167 return 0; 168 } 169 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 170 171 /* DPCM stream event, send event to FE and all active BEs. */ 172 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 173 int event) 174 { 175 struct snd_soc_dpcm *dpcm; 176 177 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) { 178 179 struct snd_soc_pcm_runtime *be = dpcm->be; 180 181 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 182 be->dai_link->name, event, dir); 183 184 snd_soc_dapm_stream_event(be, dir, event); 185 } 186 187 snd_soc_dapm_stream_event(fe, dir, event); 188 189 return 0; 190 } 191 192 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 193 struct snd_soc_dai *soc_dai) 194 { 195 struct snd_soc_pcm_runtime *rtd = substream->private_data; 196 int ret; 197 198 if (soc_dai->rate && (soc_dai->driver->symmetric_rates || 199 rtd->dai_link->symmetric_rates)) { 200 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", 201 soc_dai->rate); 202 203 ret = snd_pcm_hw_constraint_single(substream->runtime, 204 SNDRV_PCM_HW_PARAM_RATE, 205 soc_dai->rate); 206 if (ret < 0) { 207 dev_err(soc_dai->dev, 208 "ASoC: Unable to apply rate constraint: %d\n", 209 ret); 210 return ret; 211 } 212 } 213 214 if (soc_dai->channels && (soc_dai->driver->symmetric_channels || 215 rtd->dai_link->symmetric_channels)) { 216 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n", 217 soc_dai->channels); 218 219 ret = snd_pcm_hw_constraint_single(substream->runtime, 220 SNDRV_PCM_HW_PARAM_CHANNELS, 221 soc_dai->channels); 222 if (ret < 0) { 223 dev_err(soc_dai->dev, 224 "ASoC: Unable to apply channel symmetry constraint: %d\n", 225 ret); 226 return ret; 227 } 228 } 229 230 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits || 231 rtd->dai_link->symmetric_samplebits)) { 232 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n", 233 soc_dai->sample_bits); 234 235 ret = snd_pcm_hw_constraint_single(substream->runtime, 236 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 237 soc_dai->sample_bits); 238 if (ret < 0) { 239 dev_err(soc_dai->dev, 240 "ASoC: Unable to apply sample bits symmetry constraint: %d\n", 241 ret); 242 return ret; 243 } 244 } 245 246 return 0; 247 } 248 249 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 250 struct snd_pcm_hw_params *params) 251 { 252 struct snd_soc_pcm_runtime *rtd = substream->private_data; 253 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 254 unsigned int rate, channels, sample_bits, symmetry, i; 255 256 rate = params_rate(params); 257 channels = params_channels(params); 258 sample_bits = snd_pcm_format_physical_width(params_format(params)); 259 260 /* reject unmatched parameters when applying symmetry */ 261 symmetry = cpu_dai->driver->symmetric_rates || 262 rtd->dai_link->symmetric_rates; 263 264 for (i = 0; i < rtd->num_codecs; i++) 265 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates; 266 267 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) { 268 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n", 269 cpu_dai->rate, rate); 270 return -EINVAL; 271 } 272 273 symmetry = cpu_dai->driver->symmetric_channels || 274 rtd->dai_link->symmetric_channels; 275 276 for (i = 0; i < rtd->num_codecs; i++) 277 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels; 278 279 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) { 280 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n", 281 cpu_dai->channels, channels); 282 return -EINVAL; 283 } 284 285 symmetry = cpu_dai->driver->symmetric_samplebits || 286 rtd->dai_link->symmetric_samplebits; 287 288 for (i = 0; i < rtd->num_codecs; i++) 289 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits; 290 291 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) { 292 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n", 293 cpu_dai->sample_bits, sample_bits); 294 return -EINVAL; 295 } 296 297 return 0; 298 } 299 300 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream) 301 { 302 struct snd_soc_pcm_runtime *rtd = substream->private_data; 303 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver; 304 struct snd_soc_dai_link *link = rtd->dai_link; 305 unsigned int symmetry, i; 306 307 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates || 308 cpu_driver->symmetric_channels || link->symmetric_channels || 309 cpu_driver->symmetric_samplebits || link->symmetric_samplebits; 310 311 for (i = 0; i < rtd->num_codecs; i++) 312 symmetry = symmetry || 313 rtd->codec_dais[i]->driver->symmetric_rates || 314 rtd->codec_dais[i]->driver->symmetric_channels || 315 rtd->codec_dais[i]->driver->symmetric_samplebits; 316 317 return symmetry; 318 } 319 320 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 321 { 322 struct snd_soc_pcm_runtime *rtd = substream->private_data; 323 int ret; 324 325 if (!bits) 326 return; 327 328 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 329 if (ret != 0) 330 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 331 bits, ret); 332 } 333 334 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 335 { 336 struct snd_soc_pcm_runtime *rtd = substream->private_data; 337 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 338 struct snd_soc_dai *codec_dai; 339 int i; 340 unsigned int bits = 0, cpu_bits; 341 342 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 343 for (i = 0; i < rtd->num_codecs; i++) { 344 codec_dai = rtd->codec_dais[i]; 345 if (codec_dai->driver->playback.sig_bits == 0) { 346 bits = 0; 347 break; 348 } 349 bits = max(codec_dai->driver->playback.sig_bits, bits); 350 } 351 cpu_bits = cpu_dai->driver->playback.sig_bits; 352 } else { 353 for (i = 0; i < rtd->num_codecs; i++) { 354 codec_dai = rtd->codec_dais[i]; 355 if (codec_dai->driver->capture.sig_bits == 0) { 356 bits = 0; 357 break; 358 } 359 bits = max(codec_dai->driver->capture.sig_bits, bits); 360 } 361 cpu_bits = cpu_dai->driver->capture.sig_bits; 362 } 363 364 soc_pcm_set_msb(substream, bits); 365 soc_pcm_set_msb(substream, cpu_bits); 366 } 367 368 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 369 { 370 struct snd_pcm_runtime *runtime = substream->runtime; 371 struct snd_pcm_hardware *hw = &runtime->hw; 372 struct snd_soc_pcm_runtime *rtd = substream->private_data; 373 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver; 374 struct snd_soc_dai_driver *codec_dai_drv; 375 struct snd_soc_pcm_stream *codec_stream; 376 struct snd_soc_pcm_stream *cpu_stream; 377 unsigned int chan_min = 0, chan_max = UINT_MAX; 378 unsigned int rate_min = 0, rate_max = UINT_MAX; 379 unsigned int rates = UINT_MAX; 380 u64 formats = ULLONG_MAX; 381 int i; 382 383 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 384 cpu_stream = &cpu_dai_drv->playback; 385 else 386 cpu_stream = &cpu_dai_drv->capture; 387 388 /* first calculate min/max only for CODECs in the DAI link */ 389 for (i = 0; i < rtd->num_codecs; i++) { 390 391 /* 392 * Skip CODECs which don't support the current stream type. 393 * Otherwise, since the rate, channel, and format values will 394 * zero in that case, we would have no usable settings left, 395 * causing the resulting setup to fail. 396 * At least one CODEC should match, otherwise we should have 397 * bailed out on a higher level, since there would be no 398 * CODEC to support the transfer direction in that case. 399 */ 400 if (!snd_soc_dai_stream_valid(rtd->codec_dais[i], 401 substream->stream)) 402 continue; 403 404 codec_dai_drv = rtd->codec_dais[i]->driver; 405 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 406 codec_stream = &codec_dai_drv->playback; 407 else 408 codec_stream = &codec_dai_drv->capture; 409 chan_min = max(chan_min, codec_stream->channels_min); 410 chan_max = min(chan_max, codec_stream->channels_max); 411 rate_min = max(rate_min, codec_stream->rate_min); 412 rate_max = min_not_zero(rate_max, codec_stream->rate_max); 413 formats &= codec_stream->formats; 414 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates); 415 } 416 417 /* 418 * chan min/max cannot be enforced if there are multiple CODEC DAIs 419 * connected to a single CPU DAI, use CPU DAI's directly and let 420 * channel allocation be fixed up later 421 */ 422 if (rtd->num_codecs > 1) { 423 chan_min = cpu_stream->channels_min; 424 chan_max = cpu_stream->channels_max; 425 } 426 427 hw->channels_min = max(chan_min, cpu_stream->channels_min); 428 hw->channels_max = min(chan_max, cpu_stream->channels_max); 429 if (hw->formats) 430 hw->formats &= formats & cpu_stream->formats; 431 else 432 hw->formats = formats & cpu_stream->formats; 433 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates); 434 435 snd_pcm_limit_hw_rates(runtime); 436 437 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min); 438 hw->rate_min = max(hw->rate_min, rate_min); 439 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max); 440 hw->rate_max = min_not_zero(hw->rate_max, rate_max); 441 } 442 443 /* 444 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 445 * then initialized and any private data can be allocated. This also calls 446 * startup for the cpu DAI, platform, machine and codec DAI. 447 */ 448 static int soc_pcm_open(struct snd_pcm_substream *substream) 449 { 450 struct snd_soc_pcm_runtime *rtd = substream->private_data; 451 struct snd_pcm_runtime *runtime = substream->runtime; 452 struct snd_soc_platform *platform = rtd->platform; 453 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 454 struct snd_soc_dai *codec_dai; 455 const char *codec_dai_name = "multicodec"; 456 int i, ret = 0; 457 458 pinctrl_pm_select_default_state(cpu_dai->dev); 459 for (i = 0; i < rtd->num_codecs; i++) 460 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev); 461 pm_runtime_get_sync(cpu_dai->dev); 462 for (i = 0; i < rtd->num_codecs; i++) 463 pm_runtime_get_sync(rtd->codec_dais[i]->dev); 464 pm_runtime_get_sync(platform->dev); 465 466 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 467 468 /* startup the audio subsystem */ 469 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) { 470 ret = cpu_dai->driver->ops->startup(substream, cpu_dai); 471 if (ret < 0) { 472 dev_err(cpu_dai->dev, "ASoC: can't open interface" 473 " %s: %d\n", cpu_dai->name, ret); 474 goto out; 475 } 476 } 477 478 if (platform->driver->ops && platform->driver->ops->open) { 479 ret = platform->driver->ops->open(substream); 480 if (ret < 0) { 481 dev_err(platform->dev, "ASoC: can't open platform" 482 " %s: %d\n", platform->component.name, ret); 483 goto platform_err; 484 } 485 } 486 487 for (i = 0; i < rtd->num_codecs; i++) { 488 codec_dai = rtd->codec_dais[i]; 489 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) { 490 ret = codec_dai->driver->ops->startup(substream, 491 codec_dai); 492 if (ret < 0) { 493 dev_err(codec_dai->dev, 494 "ASoC: can't open codec %s: %d\n", 495 codec_dai->name, ret); 496 goto codec_dai_err; 497 } 498 } 499 500 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 501 codec_dai->tx_mask = 0; 502 else 503 codec_dai->rx_mask = 0; 504 } 505 506 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) { 507 ret = rtd->dai_link->ops->startup(substream); 508 if (ret < 0) { 509 pr_err("ASoC: %s startup failed: %d\n", 510 rtd->dai_link->name, ret); 511 goto machine_err; 512 } 513 } 514 515 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 516 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 517 goto dynamic; 518 519 /* Check that the codec and cpu DAIs are compatible */ 520 soc_pcm_init_runtime_hw(substream); 521 522 if (rtd->num_codecs == 1) 523 codec_dai_name = rtd->codec_dai->name; 524 525 if (soc_pcm_has_symmetry(substream)) 526 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 527 528 ret = -EINVAL; 529 if (!runtime->hw.rates) { 530 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n", 531 codec_dai_name, cpu_dai->name); 532 goto config_err; 533 } 534 if (!runtime->hw.formats) { 535 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n", 536 codec_dai_name, cpu_dai->name); 537 goto config_err; 538 } 539 if (!runtime->hw.channels_min || !runtime->hw.channels_max || 540 runtime->hw.channels_min > runtime->hw.channels_max) { 541 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n", 542 codec_dai_name, cpu_dai->name); 543 goto config_err; 544 } 545 546 soc_pcm_apply_msb(substream); 547 548 /* Symmetry only applies if we've already got an active stream. */ 549 if (cpu_dai->active) { 550 ret = soc_pcm_apply_symmetry(substream, cpu_dai); 551 if (ret != 0) 552 goto config_err; 553 } 554 555 for (i = 0; i < rtd->num_codecs; i++) { 556 if (rtd->codec_dais[i]->active) { 557 ret = soc_pcm_apply_symmetry(substream, 558 rtd->codec_dais[i]); 559 if (ret != 0) 560 goto config_err; 561 } 562 } 563 564 pr_debug("ASoC: %s <-> %s info:\n", 565 codec_dai_name, cpu_dai->name); 566 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates); 567 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min, 568 runtime->hw.channels_max); 569 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min, 570 runtime->hw.rate_max); 571 572 dynamic: 573 574 snd_soc_runtime_activate(rtd, substream->stream); 575 576 mutex_unlock(&rtd->pcm_mutex); 577 return 0; 578 579 config_err: 580 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) 581 rtd->dai_link->ops->shutdown(substream); 582 583 machine_err: 584 i = rtd->num_codecs; 585 586 codec_dai_err: 587 while (--i >= 0) { 588 codec_dai = rtd->codec_dais[i]; 589 if (codec_dai->driver->ops->shutdown) 590 codec_dai->driver->ops->shutdown(substream, codec_dai); 591 } 592 593 if (platform->driver->ops && platform->driver->ops->close) 594 platform->driver->ops->close(substream); 595 596 platform_err: 597 if (cpu_dai->driver->ops->shutdown) 598 cpu_dai->driver->ops->shutdown(substream, cpu_dai); 599 out: 600 mutex_unlock(&rtd->pcm_mutex); 601 602 pm_runtime_mark_last_busy(platform->dev); 603 pm_runtime_put_autosuspend(platform->dev); 604 for (i = 0; i < rtd->num_codecs; i++) { 605 pm_runtime_mark_last_busy(rtd->codec_dais[i]->dev); 606 pm_runtime_put_autosuspend(rtd->codec_dais[i]->dev); 607 } 608 609 pm_runtime_mark_last_busy(cpu_dai->dev); 610 pm_runtime_put_autosuspend(cpu_dai->dev); 611 for (i = 0; i < rtd->num_codecs; i++) { 612 if (!rtd->codec_dais[i]->active) 613 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev); 614 } 615 if (!cpu_dai->active) 616 pinctrl_pm_select_sleep_state(cpu_dai->dev); 617 618 return ret; 619 } 620 621 /* 622 * Power down the audio subsystem pmdown_time msecs after close is called. 623 * This is to ensure there are no pops or clicks in between any music tracks 624 * due to DAPM power cycling. 625 */ 626 static void close_delayed_work(struct work_struct *work) 627 { 628 struct snd_soc_pcm_runtime *rtd = 629 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work); 630 struct snd_soc_dai *codec_dai = rtd->codec_dais[0]; 631 632 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 633 634 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n", 635 codec_dai->driver->playback.stream_name, 636 codec_dai->playback_active ? "active" : "inactive", 637 rtd->pop_wait ? "yes" : "no"); 638 639 /* are we waiting on this codec DAI stream */ 640 if (rtd->pop_wait == 1) { 641 rtd->pop_wait = 0; 642 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, 643 SND_SOC_DAPM_STREAM_STOP); 644 } 645 646 mutex_unlock(&rtd->pcm_mutex); 647 } 648 649 /* 650 * Called by ALSA when a PCM substream is closed. Private data can be 651 * freed here. The cpu DAI, codec DAI, machine and platform are also 652 * shutdown. 653 */ 654 static int soc_pcm_close(struct snd_pcm_substream *substream) 655 { 656 struct snd_soc_pcm_runtime *rtd = substream->private_data; 657 struct snd_soc_platform *platform = rtd->platform; 658 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 659 struct snd_soc_dai *codec_dai; 660 int i; 661 662 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 663 664 snd_soc_runtime_deactivate(rtd, substream->stream); 665 666 /* clear the corresponding DAIs rate when inactive */ 667 if (!cpu_dai->active) 668 cpu_dai->rate = 0; 669 670 for (i = 0; i < rtd->num_codecs; i++) { 671 codec_dai = rtd->codec_dais[i]; 672 if (!codec_dai->active) 673 codec_dai->rate = 0; 674 } 675 676 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream); 677 678 if (cpu_dai->driver->ops->shutdown) 679 cpu_dai->driver->ops->shutdown(substream, cpu_dai); 680 681 for (i = 0; i < rtd->num_codecs; i++) { 682 codec_dai = rtd->codec_dais[i]; 683 if (codec_dai->driver->ops->shutdown) 684 codec_dai->driver->ops->shutdown(substream, codec_dai); 685 } 686 687 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) 688 rtd->dai_link->ops->shutdown(substream); 689 690 if (platform->driver->ops && platform->driver->ops->close) 691 platform->driver->ops->close(substream); 692 693 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 694 if (snd_soc_runtime_ignore_pmdown_time(rtd)) { 695 /* powered down playback stream now */ 696 snd_soc_dapm_stream_event(rtd, 697 SNDRV_PCM_STREAM_PLAYBACK, 698 SND_SOC_DAPM_STREAM_STOP); 699 } else { 700 /* start delayed pop wq here for playback streams */ 701 rtd->pop_wait = 1; 702 queue_delayed_work(system_power_efficient_wq, 703 &rtd->delayed_work, 704 msecs_to_jiffies(rtd->pmdown_time)); 705 } 706 } else { 707 /* capture streams can be powered down now */ 708 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE, 709 SND_SOC_DAPM_STREAM_STOP); 710 } 711 712 mutex_unlock(&rtd->pcm_mutex); 713 714 pm_runtime_mark_last_busy(platform->dev); 715 pm_runtime_put_autosuspend(platform->dev); 716 717 for (i = 0; i < rtd->num_codecs; i++) { 718 pm_runtime_mark_last_busy(rtd->codec_dais[i]->dev); 719 pm_runtime_put_autosuspend(rtd->codec_dais[i]->dev); 720 } 721 722 pm_runtime_mark_last_busy(cpu_dai->dev); 723 pm_runtime_put_autosuspend(cpu_dai->dev); 724 725 for (i = 0; i < rtd->num_codecs; i++) { 726 if (!rtd->codec_dais[i]->active) 727 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev); 728 } 729 if (!cpu_dai->active) 730 pinctrl_pm_select_sleep_state(cpu_dai->dev); 731 732 return 0; 733 } 734 735 /* 736 * Called by ALSA when the PCM substream is prepared, can set format, sample 737 * rate, etc. This function is non atomic and can be called multiple times, 738 * it can refer to the runtime info. 739 */ 740 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 741 { 742 struct snd_soc_pcm_runtime *rtd = substream->private_data; 743 struct snd_soc_platform *platform = rtd->platform; 744 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 745 struct snd_soc_dai *codec_dai; 746 int i, ret = 0; 747 748 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 749 750 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) { 751 ret = rtd->dai_link->ops->prepare(substream); 752 if (ret < 0) { 753 dev_err(rtd->card->dev, "ASoC: machine prepare error:" 754 " %d\n", ret); 755 goto out; 756 } 757 } 758 759 if (platform->driver->ops && platform->driver->ops->prepare) { 760 ret = platform->driver->ops->prepare(substream); 761 if (ret < 0) { 762 dev_err(platform->dev, "ASoC: platform prepare error:" 763 " %d\n", ret); 764 goto out; 765 } 766 } 767 768 for (i = 0; i < rtd->num_codecs; i++) { 769 codec_dai = rtd->codec_dais[i]; 770 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) { 771 ret = codec_dai->driver->ops->prepare(substream, 772 codec_dai); 773 if (ret < 0) { 774 dev_err(codec_dai->dev, 775 "ASoC: codec DAI prepare error: %d\n", 776 ret); 777 goto out; 778 } 779 } 780 } 781 782 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) { 783 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai); 784 if (ret < 0) { 785 dev_err(cpu_dai->dev, 786 "ASoC: cpu DAI prepare error: %d\n", ret); 787 goto out; 788 } 789 } 790 791 /* cancel any delayed stream shutdown that is pending */ 792 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 793 rtd->pop_wait) { 794 rtd->pop_wait = 0; 795 cancel_delayed_work(&rtd->delayed_work); 796 } 797 798 snd_soc_dapm_stream_event(rtd, substream->stream, 799 SND_SOC_DAPM_STREAM_START); 800 801 for (i = 0; i < rtd->num_codecs; i++) 802 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0, 803 substream->stream); 804 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream); 805 806 out: 807 mutex_unlock(&rtd->pcm_mutex); 808 return ret; 809 } 810 811 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 812 unsigned int mask) 813 { 814 struct snd_interval *interval; 815 int channels = hweight_long(mask); 816 817 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 818 interval->min = channels; 819 interval->max = channels; 820 } 821 822 int soc_dai_hw_params(struct snd_pcm_substream *substream, 823 struct snd_pcm_hw_params *params, 824 struct snd_soc_dai *dai) 825 { 826 int ret; 827 828 if (dai->driver->ops && dai->driver->ops->hw_params) { 829 ret = dai->driver->ops->hw_params(substream, params, dai); 830 if (ret < 0) { 831 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n", 832 dai->name, ret); 833 return ret; 834 } 835 } 836 837 return 0; 838 } 839 840 /* 841 * Called by ALSA when the hardware params are set by application. This 842 * function can also be called multiple times and can allocate buffers 843 * (using snd_pcm_lib_* ). It's non-atomic. 844 */ 845 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 846 struct snd_pcm_hw_params *params) 847 { 848 struct snd_soc_pcm_runtime *rtd = substream->private_data; 849 struct snd_soc_platform *platform = rtd->platform; 850 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 851 int i, ret = 0; 852 853 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 854 855 ret = soc_pcm_params_symmetry(substream, params); 856 if (ret) 857 goto out; 858 859 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) { 860 ret = rtd->dai_link->ops->hw_params(substream, params); 861 if (ret < 0) { 862 dev_err(rtd->card->dev, "ASoC: machine hw_params" 863 " failed: %d\n", ret); 864 goto out; 865 } 866 } 867 868 for (i = 0; i < rtd->num_codecs; i++) { 869 struct snd_soc_dai *codec_dai = rtd->codec_dais[i]; 870 struct snd_pcm_hw_params codec_params; 871 872 /* 873 * Skip CODECs which don't support the current stream type, 874 * the idea being that if a CODEC is not used for the currently 875 * set up transfer direction, it should not need to be 876 * configured, especially since the configuration used might 877 * not even be supported by that CODEC. There may be cases 878 * however where a CODEC needs to be set up although it is 879 * actually not being used for the transfer, e.g. if a 880 * capture-only CODEC is acting as an LRCLK and/or BCLK master 881 * for the DAI link including a playback-only CODEC. 882 * If this becomes necessary, we will have to augment the 883 * machine driver setup with information on how to act, so 884 * we can do the right thing here. 885 */ 886 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 887 continue; 888 889 /* copy params for each codec */ 890 codec_params = *params; 891 892 /* fixup params based on TDM slot masks */ 893 if (codec_dai->tx_mask) 894 soc_pcm_codec_params_fixup(&codec_params, 895 codec_dai->tx_mask); 896 if (codec_dai->rx_mask) 897 soc_pcm_codec_params_fixup(&codec_params, 898 codec_dai->rx_mask); 899 900 ret = soc_dai_hw_params(substream, &codec_params, codec_dai); 901 if(ret < 0) 902 goto codec_err; 903 904 codec_dai->rate = params_rate(&codec_params); 905 codec_dai->channels = params_channels(&codec_params); 906 codec_dai->sample_bits = snd_pcm_format_physical_width( 907 params_format(&codec_params)); 908 } 909 910 ret = soc_dai_hw_params(substream, params, cpu_dai); 911 if (ret < 0) 912 goto interface_err; 913 914 if (platform->driver->ops && platform->driver->ops->hw_params) { 915 ret = platform->driver->ops->hw_params(substream, params); 916 if (ret < 0) { 917 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n", 918 platform->component.name, ret); 919 goto platform_err; 920 } 921 } 922 923 /* store the parameters for each DAIs */ 924 cpu_dai->rate = params_rate(params); 925 cpu_dai->channels = params_channels(params); 926 cpu_dai->sample_bits = 927 snd_pcm_format_physical_width(params_format(params)); 928 929 out: 930 mutex_unlock(&rtd->pcm_mutex); 931 return ret; 932 933 platform_err: 934 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free) 935 cpu_dai->driver->ops->hw_free(substream, cpu_dai); 936 937 interface_err: 938 i = rtd->num_codecs; 939 940 codec_err: 941 while (--i >= 0) { 942 struct snd_soc_dai *codec_dai = rtd->codec_dais[i]; 943 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free) 944 codec_dai->driver->ops->hw_free(substream, codec_dai); 945 codec_dai->rate = 0; 946 } 947 948 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) 949 rtd->dai_link->ops->hw_free(substream); 950 951 mutex_unlock(&rtd->pcm_mutex); 952 return ret; 953 } 954 955 /* 956 * Frees resources allocated by hw_params, can be called multiple times 957 */ 958 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 959 { 960 struct snd_soc_pcm_runtime *rtd = substream->private_data; 961 struct snd_soc_platform *platform = rtd->platform; 962 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 963 struct snd_soc_dai *codec_dai; 964 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 965 int i; 966 967 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 968 969 /* clear the corresponding DAIs parameters when going to be inactive */ 970 if (cpu_dai->active == 1) { 971 cpu_dai->rate = 0; 972 cpu_dai->channels = 0; 973 cpu_dai->sample_bits = 0; 974 } 975 976 for (i = 0; i < rtd->num_codecs; i++) { 977 codec_dai = rtd->codec_dais[i]; 978 if (codec_dai->active == 1) { 979 codec_dai->rate = 0; 980 codec_dai->channels = 0; 981 codec_dai->sample_bits = 0; 982 } 983 } 984 985 /* apply codec digital mute */ 986 for (i = 0; i < rtd->num_codecs; i++) { 987 if ((playback && rtd->codec_dais[i]->playback_active == 1) || 988 (!playback && rtd->codec_dais[i]->capture_active == 1)) 989 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1, 990 substream->stream); 991 } 992 993 /* free any machine hw params */ 994 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) 995 rtd->dai_link->ops->hw_free(substream); 996 997 /* free any DMA resources */ 998 if (platform->driver->ops && platform->driver->ops->hw_free) 999 platform->driver->ops->hw_free(substream); 1000 1001 /* now free hw params for the DAIs */ 1002 for (i = 0; i < rtd->num_codecs; i++) { 1003 codec_dai = rtd->codec_dais[i]; 1004 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free) 1005 codec_dai->driver->ops->hw_free(substream, codec_dai); 1006 } 1007 1008 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free) 1009 cpu_dai->driver->ops->hw_free(substream, cpu_dai); 1010 1011 mutex_unlock(&rtd->pcm_mutex); 1012 return 0; 1013 } 1014 1015 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1016 { 1017 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1018 struct snd_soc_platform *platform = rtd->platform; 1019 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1020 struct snd_soc_dai *codec_dai; 1021 int i, ret; 1022 1023 for (i = 0; i < rtd->num_codecs; i++) { 1024 codec_dai = rtd->codec_dais[i]; 1025 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) { 1026 ret = codec_dai->driver->ops->trigger(substream, 1027 cmd, codec_dai); 1028 if (ret < 0) 1029 return ret; 1030 } 1031 } 1032 1033 if (platform->driver->ops && platform->driver->ops->trigger) { 1034 ret = platform->driver->ops->trigger(substream, cmd); 1035 if (ret < 0) 1036 return ret; 1037 } 1038 1039 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) { 1040 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai); 1041 if (ret < 0) 1042 return ret; 1043 } 1044 1045 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) { 1046 ret = rtd->dai_link->ops->trigger(substream, cmd); 1047 if (ret < 0) 1048 return ret; 1049 } 1050 1051 return 0; 1052 } 1053 1054 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream, 1055 int cmd) 1056 { 1057 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1058 struct snd_soc_platform *platform = rtd->platform; 1059 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1060 struct snd_soc_dai *codec_dai; 1061 int i, ret; 1062 1063 for (i = 0; i < rtd->num_codecs; i++) { 1064 codec_dai = rtd->codec_dais[i]; 1065 if (codec_dai->driver->ops && 1066 codec_dai->driver->ops->bespoke_trigger) { 1067 ret = codec_dai->driver->ops->bespoke_trigger(substream, 1068 cmd, codec_dai); 1069 if (ret < 0) 1070 return ret; 1071 } 1072 } 1073 1074 if (platform->driver->bespoke_trigger) { 1075 ret = platform->driver->bespoke_trigger(substream, cmd); 1076 if (ret < 0) 1077 return ret; 1078 } 1079 1080 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) { 1081 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai); 1082 if (ret < 0) 1083 return ret; 1084 } 1085 return 0; 1086 } 1087 /* 1088 * soc level wrapper for pointer callback 1089 * If cpu_dai, codec_dai, platform driver has the delay callback, than 1090 * the runtime->delay will be updated accordingly. 1091 */ 1092 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1093 { 1094 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1095 struct snd_soc_platform *platform = rtd->platform; 1096 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1097 struct snd_soc_dai *codec_dai; 1098 struct snd_pcm_runtime *runtime = substream->runtime; 1099 snd_pcm_uframes_t offset = 0; 1100 snd_pcm_sframes_t delay = 0; 1101 snd_pcm_sframes_t codec_delay = 0; 1102 int i; 1103 1104 if (platform->driver->ops && platform->driver->ops->pointer) 1105 offset = platform->driver->ops->pointer(substream); 1106 1107 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay) 1108 delay += cpu_dai->driver->ops->delay(substream, cpu_dai); 1109 1110 for (i = 0; i < rtd->num_codecs; i++) { 1111 codec_dai = rtd->codec_dais[i]; 1112 if (codec_dai->driver->ops && codec_dai->driver->ops->delay) 1113 codec_delay = max(codec_delay, 1114 codec_dai->driver->ops->delay(substream, 1115 codec_dai)); 1116 } 1117 delay += codec_delay; 1118 1119 /* 1120 * None of the existing platform drivers implement delay(), so 1121 * for now the codec_dai of first multicodec entry is used 1122 */ 1123 if (platform->driver->delay) 1124 delay += platform->driver->delay(substream, rtd->codec_dais[0]); 1125 1126 runtime->delay = delay; 1127 1128 return offset; 1129 } 1130 1131 /* connect a FE and BE */ 1132 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1133 struct snd_soc_pcm_runtime *be, int stream) 1134 { 1135 struct snd_soc_dpcm *dpcm; 1136 1137 /* only add new dpcms */ 1138 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1139 if (dpcm->be == be && dpcm->fe == fe) 1140 return 0; 1141 } 1142 1143 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1144 if (!dpcm) 1145 return -ENOMEM; 1146 1147 dpcm->be = be; 1148 dpcm->fe = fe; 1149 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1150 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1151 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1152 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1153 1154 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1155 stream ? "capture" : "playback", fe->dai_link->name, 1156 stream ? "<-" : "->", be->dai_link->name); 1157 1158 #ifdef CONFIG_DEBUG_FS 1159 if (fe->debugfs_dpcm_root) 1160 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644, 1161 fe->debugfs_dpcm_root, &dpcm->state); 1162 #endif 1163 return 1; 1164 } 1165 1166 /* reparent a BE onto another FE */ 1167 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1168 struct snd_soc_pcm_runtime *be, int stream) 1169 { 1170 struct snd_soc_dpcm *dpcm; 1171 struct snd_pcm_substream *fe_substream, *be_substream; 1172 1173 /* reparent if BE is connected to other FEs */ 1174 if (!be->dpcm[stream].users) 1175 return; 1176 1177 be_substream = snd_soc_dpcm_get_substream(be, stream); 1178 1179 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 1180 if (dpcm->fe == fe) 1181 continue; 1182 1183 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1184 stream ? "capture" : "playback", 1185 dpcm->fe->dai_link->name, 1186 stream ? "<-" : "->", dpcm->be->dai_link->name); 1187 1188 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1189 be_substream->runtime = fe_substream->runtime; 1190 break; 1191 } 1192 } 1193 1194 /* disconnect a BE and FE */ 1195 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1196 { 1197 struct snd_soc_dpcm *dpcm, *d; 1198 1199 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) { 1200 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1201 stream ? "capture" : "playback", 1202 dpcm->be->dai_link->name); 1203 1204 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1205 continue; 1206 1207 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1208 stream ? "capture" : "playback", fe->dai_link->name, 1209 stream ? "<-" : "->", dpcm->be->dai_link->name); 1210 1211 /* BEs still alive need new FE */ 1212 dpcm_be_reparent(fe, dpcm->be, stream); 1213 1214 #ifdef CONFIG_DEBUG_FS 1215 debugfs_remove(dpcm->debugfs_state); 1216 #endif 1217 list_del(&dpcm->list_be); 1218 list_del(&dpcm->list_fe); 1219 kfree(dpcm); 1220 } 1221 } 1222 1223 /* get BE for DAI widget and stream */ 1224 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1225 struct snd_soc_dapm_widget *widget, int stream) 1226 { 1227 struct snd_soc_pcm_runtime *be; 1228 int i; 1229 1230 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1231 list_for_each_entry(be, &card->rtd_list, list) { 1232 1233 if (!be->dai_link->no_pcm) 1234 continue; 1235 1236 if (be->cpu_dai->playback_widget == widget) 1237 return be; 1238 1239 for (i = 0; i < be->num_codecs; i++) { 1240 struct snd_soc_dai *dai = be->codec_dais[i]; 1241 if (dai->playback_widget == widget) 1242 return be; 1243 } 1244 } 1245 } else { 1246 1247 list_for_each_entry(be, &card->rtd_list, list) { 1248 1249 if (!be->dai_link->no_pcm) 1250 continue; 1251 1252 if (be->cpu_dai->capture_widget == widget) 1253 return be; 1254 1255 for (i = 0; i < be->num_codecs; i++) { 1256 struct snd_soc_dai *dai = be->codec_dais[i]; 1257 if (dai->capture_widget == widget) 1258 return be; 1259 } 1260 } 1261 } 1262 1263 dev_err(card->dev, "ASoC: can't get %s BE for %s\n", 1264 stream ? "capture" : "playback", widget->name); 1265 return NULL; 1266 } 1267 1268 static inline struct snd_soc_dapm_widget * 1269 dai_get_widget(struct snd_soc_dai *dai, int stream) 1270 { 1271 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1272 return dai->playback_widget; 1273 else 1274 return dai->capture_widget; 1275 } 1276 1277 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1278 struct snd_soc_dapm_widget *widget) 1279 { 1280 int i; 1281 1282 for (i = 0; i < list->num_widgets; i++) { 1283 if (widget == list->widgets[i]) 1284 return 1; 1285 } 1286 1287 return 0; 1288 } 1289 1290 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1291 int stream, struct snd_soc_dapm_widget_list **list) 1292 { 1293 struct snd_soc_dai *cpu_dai = fe->cpu_dai; 1294 int paths; 1295 1296 /* get number of valid DAI paths and their widgets */ 1297 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list); 1298 1299 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1300 stream ? "capture" : "playback"); 1301 1302 return paths; 1303 } 1304 1305 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1306 struct snd_soc_dapm_widget_list **list_) 1307 { 1308 struct snd_soc_dpcm *dpcm; 1309 struct snd_soc_dapm_widget_list *list = *list_; 1310 struct snd_soc_dapm_widget *widget; 1311 int prune = 0; 1312 1313 /* Destroy any old FE <--> BE connections */ 1314 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1315 unsigned int i; 1316 1317 /* is there a valid CPU DAI widget for this BE */ 1318 widget = dai_get_widget(dpcm->be->cpu_dai, stream); 1319 1320 /* prune the BE if it's no longer in our active list */ 1321 if (widget && widget_in_list(list, widget)) 1322 continue; 1323 1324 /* is there a valid CODEC DAI widget for this BE */ 1325 for (i = 0; i < dpcm->be->num_codecs; i++) { 1326 struct snd_soc_dai *dai = dpcm->be->codec_dais[i]; 1327 widget = dai_get_widget(dai, stream); 1328 1329 /* prune the BE if it's no longer in our active list */ 1330 if (widget && widget_in_list(list, widget)) 1331 continue; 1332 } 1333 1334 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1335 stream ? "capture" : "playback", 1336 dpcm->be->dai_link->name, fe->dai_link->name); 1337 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1338 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1339 prune++; 1340 } 1341 1342 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1343 return prune; 1344 } 1345 1346 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1347 struct snd_soc_dapm_widget_list **list_) 1348 { 1349 struct snd_soc_card *card = fe->card; 1350 struct snd_soc_dapm_widget_list *list = *list_; 1351 struct snd_soc_pcm_runtime *be; 1352 int i, new = 0, err; 1353 1354 /* Create any new FE <--> BE connections */ 1355 for (i = 0; i < list->num_widgets; i++) { 1356 1357 switch (list->widgets[i]->id) { 1358 case snd_soc_dapm_dai_in: 1359 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1360 continue; 1361 break; 1362 case snd_soc_dapm_dai_out: 1363 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1364 continue; 1365 break; 1366 default: 1367 continue; 1368 } 1369 1370 /* is there a valid BE rtd for this widget */ 1371 be = dpcm_get_be(card, list->widgets[i], stream); 1372 if (!be) { 1373 dev_err(fe->dev, "ASoC: no BE found for %s\n", 1374 list->widgets[i]->name); 1375 continue; 1376 } 1377 1378 /* make sure BE is a real BE */ 1379 if (!be->dai_link->no_pcm) 1380 continue; 1381 1382 /* don't connect if FE is not running */ 1383 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1384 continue; 1385 1386 /* newly connected FE and BE */ 1387 err = dpcm_be_connect(fe, be, stream); 1388 if (err < 0) { 1389 dev_err(fe->dev, "ASoC: can't connect %s\n", 1390 list->widgets[i]->name); 1391 break; 1392 } else if (err == 0) /* already connected */ 1393 continue; 1394 1395 /* new */ 1396 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1397 new++; 1398 } 1399 1400 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1401 return new; 1402 } 1403 1404 /* 1405 * Find the corresponding BE DAIs that source or sink audio to this 1406 * FE substream. 1407 */ 1408 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1409 int stream, struct snd_soc_dapm_widget_list **list, int new) 1410 { 1411 if (new) 1412 return dpcm_add_paths(fe, stream, list); 1413 else 1414 return dpcm_prune_paths(fe, stream, list); 1415 } 1416 1417 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1418 { 1419 struct snd_soc_dpcm *dpcm; 1420 1421 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 1422 dpcm->be->dpcm[stream].runtime_update = 1423 SND_SOC_DPCM_UPDATE_NO; 1424 } 1425 1426 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1427 int stream) 1428 { 1429 struct snd_soc_dpcm *dpcm; 1430 1431 /* disable any enabled and non active backends */ 1432 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1433 1434 struct snd_soc_pcm_runtime *be = dpcm->be; 1435 struct snd_pcm_substream *be_substream = 1436 snd_soc_dpcm_get_substream(be, stream); 1437 1438 if (be->dpcm[stream].users == 0) 1439 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1440 stream ? "capture" : "playback", 1441 be->dpcm[stream].state); 1442 1443 if (--be->dpcm[stream].users != 0) 1444 continue; 1445 1446 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1447 continue; 1448 1449 soc_pcm_close(be_substream); 1450 be_substream->runtime = NULL; 1451 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1452 } 1453 } 1454 1455 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1456 { 1457 struct snd_soc_dpcm *dpcm; 1458 int err, count = 0; 1459 1460 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1461 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1462 1463 struct snd_soc_pcm_runtime *be = dpcm->be; 1464 struct snd_pcm_substream *be_substream = 1465 snd_soc_dpcm_get_substream(be, stream); 1466 1467 if (!be_substream) { 1468 dev_err(be->dev, "ASoC: no backend %s stream\n", 1469 stream ? "capture" : "playback"); 1470 continue; 1471 } 1472 1473 /* is this op for this BE ? */ 1474 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1475 continue; 1476 1477 /* first time the dpcm is open ? */ 1478 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1479 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1480 stream ? "capture" : "playback", 1481 be->dpcm[stream].state); 1482 1483 if (be->dpcm[stream].users++ != 0) 1484 continue; 1485 1486 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1487 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1488 continue; 1489 1490 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1491 stream ? "capture" : "playback", be->dai_link->name); 1492 1493 be_substream->runtime = be->dpcm[stream].runtime; 1494 err = soc_pcm_open(be_substream); 1495 if (err < 0) { 1496 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1497 be->dpcm[stream].users--; 1498 if (be->dpcm[stream].users < 0) 1499 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1500 stream ? "capture" : "playback", 1501 be->dpcm[stream].state); 1502 1503 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1504 goto unwind; 1505 } 1506 1507 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1508 count++; 1509 } 1510 1511 return count; 1512 1513 unwind: 1514 /* disable any enabled and non active backends */ 1515 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1516 struct snd_soc_pcm_runtime *be = dpcm->be; 1517 struct snd_pcm_substream *be_substream = 1518 snd_soc_dpcm_get_substream(be, stream); 1519 1520 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1521 continue; 1522 1523 if (be->dpcm[stream].users == 0) 1524 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1525 stream ? "capture" : "playback", 1526 be->dpcm[stream].state); 1527 1528 if (--be->dpcm[stream].users != 0) 1529 continue; 1530 1531 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1532 continue; 1533 1534 soc_pcm_close(be_substream); 1535 be_substream->runtime = NULL; 1536 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1537 } 1538 1539 return err; 1540 } 1541 1542 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 1543 struct snd_soc_pcm_stream *stream, 1544 u64 formats) 1545 { 1546 runtime->hw.rate_min = stream->rate_min; 1547 runtime->hw.rate_max = stream->rate_max; 1548 runtime->hw.channels_min = stream->channels_min; 1549 runtime->hw.channels_max = stream->channels_max; 1550 if (runtime->hw.formats) 1551 runtime->hw.formats &= formats & stream->formats; 1552 else 1553 runtime->hw.formats = formats & stream->formats; 1554 runtime->hw.rates = stream->rates; 1555 } 1556 1557 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream) 1558 { 1559 struct snd_soc_pcm_runtime *fe = substream->private_data; 1560 struct snd_soc_dpcm *dpcm; 1561 u64 formats = ULLONG_MAX; 1562 int stream = substream->stream; 1563 1564 if (!fe->dai_link->dpcm_merged_format) 1565 return formats; 1566 1567 /* 1568 * It returns merged BE codec format 1569 * if FE want to use it (= dpcm_merged_format) 1570 */ 1571 1572 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1573 struct snd_soc_pcm_runtime *be = dpcm->be; 1574 struct snd_soc_dai_driver *codec_dai_drv; 1575 struct snd_soc_pcm_stream *codec_stream; 1576 int i; 1577 1578 for (i = 0; i < be->num_codecs; i++) { 1579 codec_dai_drv = be->codec_dais[i]->driver; 1580 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 1581 codec_stream = &codec_dai_drv->playback; 1582 else 1583 codec_stream = &codec_dai_drv->capture; 1584 1585 formats &= codec_stream->formats; 1586 } 1587 } 1588 1589 return formats; 1590 } 1591 1592 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1593 { 1594 struct snd_pcm_runtime *runtime = substream->runtime; 1595 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1596 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 1597 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; 1598 u64 format = dpcm_runtime_base_format(substream); 1599 1600 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1601 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format); 1602 else 1603 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format); 1604 } 1605 1606 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 1607 1608 /* Set FE's runtime_update state; the state is protected via PCM stream lock 1609 * for avoiding the race with trigger callback. 1610 * If the state is unset and a trigger is pending while the previous operation, 1611 * process the pending trigger action here. 1612 */ 1613 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 1614 int stream, enum snd_soc_dpcm_update state) 1615 { 1616 struct snd_pcm_substream *substream = 1617 snd_soc_dpcm_get_substream(fe, stream); 1618 1619 snd_pcm_stream_lock_irq(substream); 1620 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 1621 dpcm_fe_dai_do_trigger(substream, 1622 fe->dpcm[stream].trigger_pending - 1); 1623 fe->dpcm[stream].trigger_pending = 0; 1624 } 1625 fe->dpcm[stream].runtime_update = state; 1626 snd_pcm_stream_unlock_irq(substream); 1627 } 1628 1629 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1630 int stream) 1631 { 1632 struct snd_soc_dpcm *dpcm; 1633 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1634 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai; 1635 int err; 1636 1637 /* apply symmetry for FE */ 1638 if (soc_pcm_has_symmetry(fe_substream)) 1639 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1640 1641 /* Symmetry only applies if we've got an active stream. */ 1642 if (fe_cpu_dai->active) { 1643 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1644 if (err < 0) 1645 return err; 1646 } 1647 1648 /* apply symmetry for BE */ 1649 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1650 struct snd_soc_pcm_runtime *be = dpcm->be; 1651 struct snd_pcm_substream *be_substream = 1652 snd_soc_dpcm_get_substream(be, stream); 1653 struct snd_soc_pcm_runtime *rtd = be_substream->private_data; 1654 int i; 1655 1656 if (soc_pcm_has_symmetry(be_substream)) 1657 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1658 1659 /* Symmetry only applies if we've got an active stream. */ 1660 if (rtd->cpu_dai->active) { 1661 err = soc_pcm_apply_symmetry(be_substream, rtd->cpu_dai); 1662 if (err < 0) 1663 return err; 1664 } 1665 1666 for (i = 0; i < rtd->num_codecs; i++) { 1667 if (rtd->codec_dais[i]->active) { 1668 err = soc_pcm_apply_symmetry(be_substream, 1669 rtd->codec_dais[i]); 1670 if (err < 0) 1671 return err; 1672 } 1673 } 1674 } 1675 1676 return 0; 1677 } 1678 1679 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1680 { 1681 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1682 struct snd_pcm_runtime *runtime = fe_substream->runtime; 1683 int stream = fe_substream->stream, ret = 0; 1684 1685 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1686 1687 ret = dpcm_be_dai_startup(fe, fe_substream->stream); 1688 if (ret < 0) { 1689 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 1690 goto be_err; 1691 } 1692 1693 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1694 1695 /* start the DAI frontend */ 1696 ret = soc_pcm_open(fe_substream); 1697 if (ret < 0) { 1698 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 1699 goto unwind; 1700 } 1701 1702 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1703 1704 dpcm_set_fe_runtime(fe_substream); 1705 snd_pcm_limit_hw_rates(runtime); 1706 1707 ret = dpcm_apply_symmetry(fe_substream, stream); 1708 if (ret < 0) { 1709 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n", 1710 ret); 1711 goto unwind; 1712 } 1713 1714 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1715 return 0; 1716 1717 unwind: 1718 dpcm_be_dai_startup_unwind(fe, fe_substream->stream); 1719 be_err: 1720 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1721 return ret; 1722 } 1723 1724 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 1725 { 1726 struct snd_soc_dpcm *dpcm; 1727 1728 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 1729 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1730 1731 struct snd_soc_pcm_runtime *be = dpcm->be; 1732 struct snd_pcm_substream *be_substream = 1733 snd_soc_dpcm_get_substream(be, stream); 1734 1735 /* is this op for this BE ? */ 1736 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1737 continue; 1738 1739 if (be->dpcm[stream].users == 0) 1740 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1741 stream ? "capture" : "playback", 1742 be->dpcm[stream].state); 1743 1744 if (--be->dpcm[stream].users != 0) 1745 continue; 1746 1747 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1748 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) 1749 continue; 1750 1751 dev_dbg(be->dev, "ASoC: close BE %s\n", 1752 dpcm->fe->dai_link->name); 1753 1754 soc_pcm_close(be_substream); 1755 be_substream->runtime = NULL; 1756 1757 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1758 } 1759 return 0; 1760 } 1761 1762 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1763 { 1764 struct snd_soc_pcm_runtime *fe = substream->private_data; 1765 int stream = substream->stream; 1766 1767 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1768 1769 /* shutdown the BEs */ 1770 dpcm_be_dai_shutdown(fe, substream->stream); 1771 1772 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1773 1774 /* now shutdown the frontend */ 1775 soc_pcm_close(substream); 1776 1777 /* run the stream event for each BE */ 1778 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1779 1780 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1781 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1782 return 0; 1783 } 1784 1785 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1786 { 1787 struct snd_soc_dpcm *dpcm; 1788 1789 /* only hw_params backends that are either sinks or sources 1790 * to this frontend DAI */ 1791 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1792 1793 struct snd_soc_pcm_runtime *be = dpcm->be; 1794 struct snd_pcm_substream *be_substream = 1795 snd_soc_dpcm_get_substream(be, stream); 1796 1797 /* is this op for this BE ? */ 1798 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1799 continue; 1800 1801 /* only free hw when no longer used - check all FEs */ 1802 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1803 continue; 1804 1805 /* do not free hw if this BE is used by other FE */ 1806 if (be->dpcm[stream].users > 1) 1807 continue; 1808 1809 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1810 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1811 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1812 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1813 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1814 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1815 continue; 1816 1817 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1818 dpcm->fe->dai_link->name); 1819 1820 soc_pcm_hw_free(be_substream); 1821 1822 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1823 } 1824 1825 return 0; 1826 } 1827 1828 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1829 { 1830 struct snd_soc_pcm_runtime *fe = substream->private_data; 1831 int err, stream = substream->stream; 1832 1833 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1834 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1835 1836 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1837 1838 /* call hw_free on the frontend */ 1839 err = soc_pcm_hw_free(substream); 1840 if (err < 0) 1841 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 1842 fe->dai_link->name); 1843 1844 /* only hw_params backends that are either sinks or sources 1845 * to this frontend DAI */ 1846 err = dpcm_be_dai_hw_free(fe, stream); 1847 1848 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1849 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1850 1851 mutex_unlock(&fe->card->mutex); 1852 return 0; 1853 } 1854 1855 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1856 { 1857 struct snd_soc_dpcm *dpcm; 1858 int ret; 1859 1860 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1861 1862 struct snd_soc_pcm_runtime *be = dpcm->be; 1863 struct snd_pcm_substream *be_substream = 1864 snd_soc_dpcm_get_substream(be, stream); 1865 1866 /* is this op for this BE ? */ 1867 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1868 continue; 1869 1870 /* copy params for each dpcm */ 1871 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1872 sizeof(struct snd_pcm_hw_params)); 1873 1874 /* perform any hw_params fixups */ 1875 if (be->dai_link->be_hw_params_fixup) { 1876 ret = be->dai_link->be_hw_params_fixup(be, 1877 &dpcm->hw_params); 1878 if (ret < 0) { 1879 dev_err(be->dev, 1880 "ASoC: hw_params BE fixup failed %d\n", 1881 ret); 1882 goto unwind; 1883 } 1884 } 1885 1886 /* only allow hw_params() if no connected FEs are running */ 1887 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 1888 continue; 1889 1890 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1891 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1892 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 1893 continue; 1894 1895 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 1896 dpcm->fe->dai_link->name); 1897 1898 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 1899 if (ret < 0) { 1900 dev_err(dpcm->be->dev, 1901 "ASoC: hw_params BE failed %d\n", ret); 1902 goto unwind; 1903 } 1904 1905 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1906 } 1907 return 0; 1908 1909 unwind: 1910 /* disable any enabled and non active backends */ 1911 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1912 struct snd_soc_pcm_runtime *be = dpcm->be; 1913 struct snd_pcm_substream *be_substream = 1914 snd_soc_dpcm_get_substream(be, stream); 1915 1916 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1917 continue; 1918 1919 /* only allow hw_free() if no connected FEs are running */ 1920 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1921 continue; 1922 1923 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1924 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1925 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1926 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1927 continue; 1928 1929 soc_pcm_hw_free(be_substream); 1930 } 1931 1932 return ret; 1933 } 1934 1935 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 1936 struct snd_pcm_hw_params *params) 1937 { 1938 struct snd_soc_pcm_runtime *fe = substream->private_data; 1939 int ret, stream = substream->stream; 1940 1941 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1942 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1943 1944 memcpy(&fe->dpcm[substream->stream].hw_params, params, 1945 sizeof(struct snd_pcm_hw_params)); 1946 ret = dpcm_be_dai_hw_params(fe, substream->stream); 1947 if (ret < 0) { 1948 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 1949 goto out; 1950 } 1951 1952 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 1953 fe->dai_link->name, params_rate(params), 1954 params_channels(params), params_format(params)); 1955 1956 /* call hw_params on the frontend */ 1957 ret = soc_pcm_hw_params(substream, params); 1958 if (ret < 0) { 1959 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 1960 dpcm_be_dai_hw_free(fe, stream); 1961 } else 1962 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1963 1964 out: 1965 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1966 mutex_unlock(&fe->card->mutex); 1967 return ret; 1968 } 1969 1970 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 1971 struct snd_pcm_substream *substream, int cmd) 1972 { 1973 int ret; 1974 1975 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 1976 dpcm->fe->dai_link->name, cmd); 1977 1978 ret = soc_pcm_trigger(substream, cmd); 1979 if (ret < 0) 1980 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 1981 1982 return ret; 1983 } 1984 1985 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 1986 int cmd) 1987 { 1988 struct snd_soc_dpcm *dpcm; 1989 int ret = 0; 1990 1991 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 1992 1993 struct snd_soc_pcm_runtime *be = dpcm->be; 1994 struct snd_pcm_substream *be_substream = 1995 snd_soc_dpcm_get_substream(be, stream); 1996 1997 /* is this op for this BE ? */ 1998 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1999 continue; 2000 2001 switch (cmd) { 2002 case SNDRV_PCM_TRIGGER_START: 2003 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2004 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2005 continue; 2006 2007 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2008 if (ret) 2009 return ret; 2010 2011 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2012 break; 2013 case SNDRV_PCM_TRIGGER_RESUME: 2014 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2015 continue; 2016 2017 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2018 if (ret) 2019 return ret; 2020 2021 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2022 break; 2023 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2024 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2025 continue; 2026 2027 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2028 if (ret) 2029 return ret; 2030 2031 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2032 break; 2033 case SNDRV_PCM_TRIGGER_STOP: 2034 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2035 continue; 2036 2037 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2038 continue; 2039 2040 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2041 if (ret) 2042 return ret; 2043 2044 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2045 break; 2046 case SNDRV_PCM_TRIGGER_SUSPEND: 2047 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2048 continue; 2049 2050 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2051 continue; 2052 2053 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2054 if (ret) 2055 return ret; 2056 2057 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2058 break; 2059 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2060 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2061 continue; 2062 2063 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2064 continue; 2065 2066 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2067 if (ret) 2068 return ret; 2069 2070 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2071 break; 2072 } 2073 } 2074 2075 return ret; 2076 } 2077 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2078 2079 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2080 { 2081 struct snd_soc_pcm_runtime *fe = substream->private_data; 2082 int stream = substream->stream, ret; 2083 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2084 2085 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2086 2087 switch (trigger) { 2088 case SND_SOC_DPCM_TRIGGER_PRE: 2089 /* call trigger on the frontend before the backend. */ 2090 2091 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2092 fe->dai_link->name, cmd); 2093 2094 ret = soc_pcm_trigger(substream, cmd); 2095 if (ret < 0) { 2096 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2097 goto out; 2098 } 2099 2100 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2101 break; 2102 case SND_SOC_DPCM_TRIGGER_POST: 2103 /* call trigger on the frontend after the backend. */ 2104 2105 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2106 if (ret < 0) { 2107 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2108 goto out; 2109 } 2110 2111 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2112 fe->dai_link->name, cmd); 2113 2114 ret = soc_pcm_trigger(substream, cmd); 2115 break; 2116 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2117 /* bespoke trigger() - handles both FE and BEs */ 2118 2119 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2120 fe->dai_link->name, cmd); 2121 2122 ret = soc_pcm_bespoke_trigger(substream, cmd); 2123 if (ret < 0) { 2124 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2125 goto out; 2126 } 2127 break; 2128 default: 2129 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2130 fe->dai_link->name); 2131 ret = -EINVAL; 2132 goto out; 2133 } 2134 2135 switch (cmd) { 2136 case SNDRV_PCM_TRIGGER_START: 2137 case SNDRV_PCM_TRIGGER_RESUME: 2138 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2139 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2140 break; 2141 case SNDRV_PCM_TRIGGER_STOP: 2142 case SNDRV_PCM_TRIGGER_SUSPEND: 2143 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2144 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2145 break; 2146 } 2147 2148 out: 2149 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2150 return ret; 2151 } 2152 2153 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2154 { 2155 struct snd_soc_pcm_runtime *fe = substream->private_data; 2156 int stream = substream->stream; 2157 2158 /* if FE's runtime_update is already set, we're in race; 2159 * process this trigger later at exit 2160 */ 2161 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2162 fe->dpcm[stream].trigger_pending = cmd + 1; 2163 return 0; /* delayed, assuming it's successful */ 2164 } 2165 2166 /* we're alone, let's trigger */ 2167 return dpcm_fe_dai_do_trigger(substream, cmd); 2168 } 2169 2170 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2171 { 2172 struct snd_soc_dpcm *dpcm; 2173 int ret = 0; 2174 2175 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2176 2177 struct snd_soc_pcm_runtime *be = dpcm->be; 2178 struct snd_pcm_substream *be_substream = 2179 snd_soc_dpcm_get_substream(be, stream); 2180 2181 /* is this op for this BE ? */ 2182 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2183 continue; 2184 2185 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2186 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2187 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2188 continue; 2189 2190 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2191 dpcm->fe->dai_link->name); 2192 2193 ret = soc_pcm_prepare(be_substream); 2194 if (ret < 0) { 2195 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2196 ret); 2197 break; 2198 } 2199 2200 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2201 } 2202 return ret; 2203 } 2204 2205 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2206 { 2207 struct snd_soc_pcm_runtime *fe = substream->private_data; 2208 int stream = substream->stream, ret = 0; 2209 2210 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2211 2212 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2213 2214 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2215 2216 /* there is no point preparing this FE if there are no BEs */ 2217 if (list_empty(&fe->dpcm[stream].be_clients)) { 2218 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2219 fe->dai_link->name); 2220 ret = -EINVAL; 2221 goto out; 2222 } 2223 2224 ret = dpcm_be_dai_prepare(fe, substream->stream); 2225 if (ret < 0) 2226 goto out; 2227 2228 /* call prepare on the frontend */ 2229 ret = soc_pcm_prepare(substream); 2230 if (ret < 0) { 2231 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2232 fe->dai_link->name); 2233 goto out; 2234 } 2235 2236 /* run the stream event for each BE */ 2237 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2238 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2239 2240 out: 2241 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2242 mutex_unlock(&fe->card->mutex); 2243 2244 return ret; 2245 } 2246 2247 static int soc_pcm_ioctl(struct snd_pcm_substream *substream, 2248 unsigned int cmd, void *arg) 2249 { 2250 struct snd_soc_pcm_runtime *rtd = substream->private_data; 2251 struct snd_soc_platform *platform = rtd->platform; 2252 2253 if (platform->driver->ops && platform->driver->ops->ioctl) 2254 return platform->driver->ops->ioctl(substream, cmd, arg); 2255 return snd_pcm_lib_ioctl(substream, cmd, arg); 2256 } 2257 2258 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2259 { 2260 struct snd_pcm_substream *substream = 2261 snd_soc_dpcm_get_substream(fe, stream); 2262 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2263 int err; 2264 2265 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2266 stream ? "capture" : "playback", fe->dai_link->name); 2267 2268 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2269 /* call bespoke trigger - FE takes care of all BE triggers */ 2270 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2271 fe->dai_link->name); 2272 2273 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2274 if (err < 0) 2275 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2276 } else { 2277 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2278 fe->dai_link->name); 2279 2280 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2281 if (err < 0) 2282 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2283 } 2284 2285 err = dpcm_be_dai_hw_free(fe, stream); 2286 if (err < 0) 2287 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2288 2289 err = dpcm_be_dai_shutdown(fe, stream); 2290 if (err < 0) 2291 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2292 2293 /* run the stream event for each BE */ 2294 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2295 2296 return 0; 2297 } 2298 2299 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2300 { 2301 struct snd_pcm_substream *substream = 2302 snd_soc_dpcm_get_substream(fe, stream); 2303 struct snd_soc_dpcm *dpcm; 2304 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2305 int ret; 2306 2307 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2308 stream ? "capture" : "playback", fe->dai_link->name); 2309 2310 /* Only start the BE if the FE is ready */ 2311 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2312 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2313 return -EINVAL; 2314 2315 /* startup must always be called for new BEs */ 2316 ret = dpcm_be_dai_startup(fe, stream); 2317 if (ret < 0) 2318 goto disconnect; 2319 2320 /* keep going if FE state is > open */ 2321 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2322 return 0; 2323 2324 ret = dpcm_be_dai_hw_params(fe, stream); 2325 if (ret < 0) 2326 goto close; 2327 2328 /* keep going if FE state is > hw_params */ 2329 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2330 return 0; 2331 2332 2333 ret = dpcm_be_dai_prepare(fe, stream); 2334 if (ret < 0) 2335 goto hw_free; 2336 2337 /* run the stream event for each BE */ 2338 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2339 2340 /* keep going if FE state is > prepare */ 2341 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2342 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2343 return 0; 2344 2345 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2346 /* call trigger on the frontend - FE takes care of all BE triggers */ 2347 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2348 fe->dai_link->name); 2349 2350 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2351 if (ret < 0) { 2352 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2353 goto hw_free; 2354 } 2355 } else { 2356 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2357 fe->dai_link->name); 2358 2359 ret = dpcm_be_dai_trigger(fe, stream, 2360 SNDRV_PCM_TRIGGER_START); 2361 if (ret < 0) { 2362 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2363 goto hw_free; 2364 } 2365 } 2366 2367 return 0; 2368 2369 hw_free: 2370 dpcm_be_dai_hw_free(fe, stream); 2371 close: 2372 dpcm_be_dai_shutdown(fe, stream); 2373 disconnect: 2374 /* disconnect any non started BEs */ 2375 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2376 struct snd_soc_pcm_runtime *be = dpcm->be; 2377 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2378 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2379 } 2380 2381 return ret; 2382 } 2383 2384 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) 2385 { 2386 int ret; 2387 2388 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2389 ret = dpcm_run_update_startup(fe, stream); 2390 if (ret < 0) 2391 dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); 2392 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2393 2394 return ret; 2395 } 2396 2397 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) 2398 { 2399 int ret; 2400 2401 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2402 ret = dpcm_run_update_shutdown(fe, stream); 2403 if (ret < 0) 2404 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2405 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2406 2407 return ret; 2408 } 2409 2410 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2411 * any DAI links. 2412 */ 2413 int soc_dpcm_runtime_update(struct snd_soc_card *card) 2414 { 2415 struct snd_soc_pcm_runtime *fe; 2416 int old, new, paths; 2417 2418 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2419 list_for_each_entry(fe, &card->rtd_list, list) { 2420 struct snd_soc_dapm_widget_list *list; 2421 2422 /* make sure link is FE */ 2423 if (!fe->dai_link->dynamic) 2424 continue; 2425 2426 /* only check active links */ 2427 if (!fe->cpu_dai->active) 2428 continue; 2429 2430 /* DAPM sync will call this to update DSP paths */ 2431 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n", 2432 fe->dai_link->name); 2433 2434 /* skip if FE doesn't have playback capability */ 2435 if (!fe->cpu_dai->driver->playback.channels_min 2436 || !fe->codec_dai->driver->playback.channels_min) 2437 goto capture; 2438 2439 /* skip if FE isn't currently playing */ 2440 if (!fe->cpu_dai->playback_active 2441 || !fe->codec_dai->playback_active) 2442 goto capture; 2443 2444 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); 2445 if (paths < 0) { 2446 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2447 fe->dai_link->name, "playback"); 2448 mutex_unlock(&card->mutex); 2449 return paths; 2450 } 2451 2452 /* update any new playback paths */ 2453 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1); 2454 if (new) { 2455 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2456 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2457 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2458 } 2459 2460 /* update any old playback paths */ 2461 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0); 2462 if (old) { 2463 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); 2464 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); 2465 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); 2466 } 2467 2468 dpcm_path_put(&list); 2469 capture: 2470 /* skip if FE doesn't have capture capability */ 2471 if (!fe->cpu_dai->driver->capture.channels_min 2472 || !fe->codec_dai->driver->capture.channels_min) 2473 continue; 2474 2475 /* skip if FE isn't currently capturing */ 2476 if (!fe->cpu_dai->capture_active 2477 || !fe->codec_dai->capture_active) 2478 continue; 2479 2480 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); 2481 if (paths < 0) { 2482 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2483 fe->dai_link->name, "capture"); 2484 mutex_unlock(&card->mutex); 2485 return paths; 2486 } 2487 2488 /* update any new capture paths */ 2489 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1); 2490 if (new) { 2491 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2492 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2493 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2494 } 2495 2496 /* update any old capture paths */ 2497 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0); 2498 if (old) { 2499 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); 2500 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); 2501 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); 2502 } 2503 2504 dpcm_path_put(&list); 2505 } 2506 2507 mutex_unlock(&card->mutex); 2508 return 0; 2509 } 2510 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) 2511 { 2512 struct snd_soc_dpcm *dpcm; 2513 struct list_head *clients = 2514 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients; 2515 2516 list_for_each_entry(dpcm, clients, list_be) { 2517 2518 struct snd_soc_pcm_runtime *be = dpcm->be; 2519 int i; 2520 2521 if (be->dai_link->ignore_suspend) 2522 continue; 2523 2524 for (i = 0; i < be->num_codecs; i++) { 2525 struct snd_soc_dai *dai = be->codec_dais[i]; 2526 struct snd_soc_dai_driver *drv = dai->driver; 2527 2528 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", 2529 be->dai_link->name); 2530 2531 if (drv->ops && drv->ops->digital_mute && 2532 dai->playback_active) 2533 drv->ops->digital_mute(dai, mute); 2534 } 2535 } 2536 2537 return 0; 2538 } 2539 2540 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2541 { 2542 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2543 struct snd_soc_dpcm *dpcm; 2544 struct snd_soc_dapm_widget_list *list; 2545 int ret; 2546 int stream = fe_substream->stream; 2547 2548 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2549 fe->dpcm[stream].runtime = fe_substream->runtime; 2550 2551 ret = dpcm_path_get(fe, stream, &list); 2552 if (ret < 0) { 2553 mutex_unlock(&fe->card->mutex); 2554 return ret; 2555 } else if (ret == 0) { 2556 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2557 fe->dai_link->name, stream ? "capture" : "playback"); 2558 } 2559 2560 /* calculate valid and active FE <-> BE dpcms */ 2561 dpcm_process_paths(fe, stream, &list, 1); 2562 2563 ret = dpcm_fe_dai_startup(fe_substream); 2564 if (ret < 0) { 2565 /* clean up all links */ 2566 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2567 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2568 2569 dpcm_be_disconnect(fe, stream); 2570 fe->dpcm[stream].runtime = NULL; 2571 } 2572 2573 dpcm_clear_pending_state(fe, stream); 2574 dpcm_path_put(&list); 2575 mutex_unlock(&fe->card->mutex); 2576 return ret; 2577 } 2578 2579 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2580 { 2581 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2582 struct snd_soc_dpcm *dpcm; 2583 int stream = fe_substream->stream, ret; 2584 2585 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2586 ret = dpcm_fe_dai_shutdown(fe_substream); 2587 2588 /* mark FE's links ready to prune */ 2589 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 2590 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2591 2592 dpcm_be_disconnect(fe, stream); 2593 2594 fe->dpcm[stream].runtime = NULL; 2595 mutex_unlock(&fe->card->mutex); 2596 return ret; 2597 } 2598 2599 /* create a new pcm */ 2600 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2601 { 2602 struct snd_soc_platform *platform = rtd->platform; 2603 struct snd_soc_dai *codec_dai; 2604 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 2605 struct snd_pcm *pcm; 2606 char new_name[64]; 2607 int ret = 0, playback = 0, capture = 0; 2608 int i; 2609 2610 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2611 playback = rtd->dai_link->dpcm_playback; 2612 capture = rtd->dai_link->dpcm_capture; 2613 } else { 2614 for (i = 0; i < rtd->num_codecs; i++) { 2615 codec_dai = rtd->codec_dais[i]; 2616 if (codec_dai->driver->playback.channels_min) 2617 playback = 1; 2618 if (codec_dai->driver->capture.channels_min) 2619 capture = 1; 2620 } 2621 2622 capture = capture && cpu_dai->driver->capture.channels_min; 2623 playback = playback && cpu_dai->driver->playback.channels_min; 2624 } 2625 2626 if (rtd->dai_link->playback_only) { 2627 playback = 1; 2628 capture = 0; 2629 } 2630 2631 if (rtd->dai_link->capture_only) { 2632 playback = 0; 2633 capture = 1; 2634 } 2635 2636 /* create the PCM */ 2637 if (rtd->dai_link->no_pcm) { 2638 snprintf(new_name, sizeof(new_name), "(%s)", 2639 rtd->dai_link->stream_name); 2640 2641 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2642 playback, capture, &pcm); 2643 } else { 2644 if (rtd->dai_link->dynamic) 2645 snprintf(new_name, sizeof(new_name), "%s (*)", 2646 rtd->dai_link->stream_name); 2647 else 2648 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2649 rtd->dai_link->stream_name, 2650 (rtd->num_codecs > 1) ? 2651 "multicodec" : rtd->codec_dai->name, num); 2652 2653 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2654 capture, &pcm); 2655 } 2656 if (ret < 0) { 2657 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2658 rtd->dai_link->name); 2659 return ret; 2660 } 2661 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2662 2663 /* DAPM dai link stream work */ 2664 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 2665 2666 pcm->nonatomic = rtd->dai_link->nonatomic; 2667 rtd->pcm = pcm; 2668 pcm->private_data = rtd; 2669 2670 if (rtd->dai_link->no_pcm) { 2671 if (playback) 2672 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2673 if (capture) 2674 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2675 goto out; 2676 } 2677 2678 /* ASoC PCM operations */ 2679 if (rtd->dai_link->dynamic) { 2680 rtd->ops.open = dpcm_fe_dai_open; 2681 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2682 rtd->ops.prepare = dpcm_fe_dai_prepare; 2683 rtd->ops.trigger = dpcm_fe_dai_trigger; 2684 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2685 rtd->ops.close = dpcm_fe_dai_close; 2686 rtd->ops.pointer = soc_pcm_pointer; 2687 rtd->ops.ioctl = soc_pcm_ioctl; 2688 } else { 2689 rtd->ops.open = soc_pcm_open; 2690 rtd->ops.hw_params = soc_pcm_hw_params; 2691 rtd->ops.prepare = soc_pcm_prepare; 2692 rtd->ops.trigger = soc_pcm_trigger; 2693 rtd->ops.hw_free = soc_pcm_hw_free; 2694 rtd->ops.close = soc_pcm_close; 2695 rtd->ops.pointer = soc_pcm_pointer; 2696 rtd->ops.ioctl = soc_pcm_ioctl; 2697 } 2698 2699 if (platform->driver->ops) { 2700 rtd->ops.ack = platform->driver->ops->ack; 2701 rtd->ops.copy = platform->driver->ops->copy; 2702 rtd->ops.silence = platform->driver->ops->silence; 2703 rtd->ops.page = platform->driver->ops->page; 2704 rtd->ops.mmap = platform->driver->ops->mmap; 2705 } 2706 2707 if (playback) 2708 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2709 2710 if (capture) 2711 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2712 2713 if (platform->driver->pcm_new) { 2714 ret = platform->driver->pcm_new(rtd); 2715 if (ret < 0) { 2716 dev_err(platform->dev, 2717 "ASoC: pcm constructor failed: %d\n", 2718 ret); 2719 return ret; 2720 } 2721 } 2722 2723 pcm->private_free = platform->driver->pcm_free; 2724 out: 2725 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 2726 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 2727 cpu_dai->name); 2728 return ret; 2729 } 2730 2731 /* is the current PCM operation for this FE ? */ 2732 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2733 { 2734 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2735 return 1; 2736 return 0; 2737 } 2738 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2739 2740 /* is the current PCM operation for this BE ? */ 2741 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2742 struct snd_soc_pcm_runtime *be, int stream) 2743 { 2744 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2745 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2746 be->dpcm[stream].runtime_update)) 2747 return 1; 2748 return 0; 2749 } 2750 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2751 2752 /* get the substream for this BE */ 2753 struct snd_pcm_substream * 2754 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2755 { 2756 return be->pcm->streams[stream].substream; 2757 } 2758 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2759 2760 /* get the BE runtime state */ 2761 enum snd_soc_dpcm_state 2762 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) 2763 { 2764 return be->dpcm[stream].state; 2765 } 2766 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); 2767 2768 /* set the BE runtime state */ 2769 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, 2770 int stream, enum snd_soc_dpcm_state state) 2771 { 2772 be->dpcm[stream].state = state; 2773 } 2774 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); 2775 2776 /* 2777 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2778 * are not running, paused or suspended for the specified stream direction. 2779 */ 2780 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2781 struct snd_soc_pcm_runtime *be, int stream) 2782 { 2783 struct snd_soc_dpcm *dpcm; 2784 int state; 2785 2786 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2787 2788 if (dpcm->fe == fe) 2789 continue; 2790 2791 state = dpcm->fe->dpcm[stream].state; 2792 if (state == SND_SOC_DPCM_STATE_START || 2793 state == SND_SOC_DPCM_STATE_PAUSED || 2794 state == SND_SOC_DPCM_STATE_SUSPEND) 2795 return 0; 2796 } 2797 2798 /* it's safe to free/stop this BE DAI */ 2799 return 1; 2800 } 2801 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 2802 2803 /* 2804 * We can only change hw params a BE DAI if any of it's FE are not prepared, 2805 * running, paused or suspended for the specified stream direction. 2806 */ 2807 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 2808 struct snd_soc_pcm_runtime *be, int stream) 2809 { 2810 struct snd_soc_dpcm *dpcm; 2811 int state; 2812 2813 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { 2814 2815 if (dpcm->fe == fe) 2816 continue; 2817 2818 state = dpcm->fe->dpcm[stream].state; 2819 if (state == SND_SOC_DPCM_STATE_START || 2820 state == SND_SOC_DPCM_STATE_PAUSED || 2821 state == SND_SOC_DPCM_STATE_SUSPEND || 2822 state == SND_SOC_DPCM_STATE_PREPARE) 2823 return 0; 2824 } 2825 2826 /* it's safe to change hw_params */ 2827 return 1; 2828 } 2829 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 2830 2831 int snd_soc_platform_trigger(struct snd_pcm_substream *substream, 2832 int cmd, struct snd_soc_platform *platform) 2833 { 2834 if (platform->driver->ops && platform->driver->ops->trigger) 2835 return platform->driver->ops->trigger(substream, cmd); 2836 return 0; 2837 } 2838 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger); 2839 2840 #ifdef CONFIG_DEBUG_FS 2841 static char *dpcm_state_string(enum snd_soc_dpcm_state state) 2842 { 2843 switch (state) { 2844 case SND_SOC_DPCM_STATE_NEW: 2845 return "new"; 2846 case SND_SOC_DPCM_STATE_OPEN: 2847 return "open"; 2848 case SND_SOC_DPCM_STATE_HW_PARAMS: 2849 return "hw_params"; 2850 case SND_SOC_DPCM_STATE_PREPARE: 2851 return "prepare"; 2852 case SND_SOC_DPCM_STATE_START: 2853 return "start"; 2854 case SND_SOC_DPCM_STATE_STOP: 2855 return "stop"; 2856 case SND_SOC_DPCM_STATE_SUSPEND: 2857 return "suspend"; 2858 case SND_SOC_DPCM_STATE_PAUSED: 2859 return "paused"; 2860 case SND_SOC_DPCM_STATE_HW_FREE: 2861 return "hw_free"; 2862 case SND_SOC_DPCM_STATE_CLOSE: 2863 return "close"; 2864 } 2865 2866 return "unknown"; 2867 } 2868 2869 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 2870 int stream, char *buf, size_t size) 2871 { 2872 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 2873 struct snd_soc_dpcm *dpcm; 2874 ssize_t offset = 0; 2875 2876 /* FE state */ 2877 offset += snprintf(buf + offset, size - offset, 2878 "[%s - %s]\n", fe->dai_link->name, 2879 stream ? "Capture" : "Playback"); 2880 2881 offset += snprintf(buf + offset, size - offset, "State: %s\n", 2882 dpcm_state_string(fe->dpcm[stream].state)); 2883 2884 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2885 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2886 offset += snprintf(buf + offset, size - offset, 2887 "Hardware Params: " 2888 "Format = %s, Channels = %d, Rate = %d\n", 2889 snd_pcm_format_name(params_format(params)), 2890 params_channels(params), 2891 params_rate(params)); 2892 2893 /* BEs state */ 2894 offset += snprintf(buf + offset, size - offset, "Backends:\n"); 2895 2896 if (list_empty(&fe->dpcm[stream].be_clients)) { 2897 offset += snprintf(buf + offset, size - offset, 2898 " No active DSP links\n"); 2899 goto out; 2900 } 2901 2902 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 2903 struct snd_soc_pcm_runtime *be = dpcm->be; 2904 params = &dpcm->hw_params; 2905 2906 offset += snprintf(buf + offset, size - offset, 2907 "- %s\n", be->dai_link->name); 2908 2909 offset += snprintf(buf + offset, size - offset, 2910 " State: %s\n", 2911 dpcm_state_string(be->dpcm[stream].state)); 2912 2913 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 2914 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 2915 offset += snprintf(buf + offset, size - offset, 2916 " Hardware Params: " 2917 "Format = %s, Channels = %d, Rate = %d\n", 2918 snd_pcm_format_name(params_format(params)), 2919 params_channels(params), 2920 params_rate(params)); 2921 } 2922 2923 out: 2924 return offset; 2925 } 2926 2927 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 2928 size_t count, loff_t *ppos) 2929 { 2930 struct snd_soc_pcm_runtime *fe = file->private_data; 2931 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 2932 char *buf; 2933 2934 buf = kmalloc(out_count, GFP_KERNEL); 2935 if (!buf) 2936 return -ENOMEM; 2937 2938 if (fe->cpu_dai->driver->playback.channels_min) 2939 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, 2940 buf + offset, out_count - offset); 2941 2942 if (fe->cpu_dai->driver->capture.channels_min) 2943 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, 2944 buf + offset, out_count - offset); 2945 2946 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 2947 2948 kfree(buf); 2949 return ret; 2950 } 2951 2952 static const struct file_operations dpcm_state_fops = { 2953 .open = simple_open, 2954 .read = dpcm_state_read_file, 2955 .llseek = default_llseek, 2956 }; 2957 2958 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 2959 { 2960 if (!rtd->dai_link) 2961 return; 2962 2963 if (!rtd->card->debugfs_card_root) 2964 return; 2965 2966 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 2967 rtd->card->debugfs_card_root); 2968 if (!rtd->debugfs_dpcm_root) { 2969 dev_dbg(rtd->dev, 2970 "ASoC: Failed to create dpcm debugfs directory %s\n", 2971 rtd->dai_link->name); 2972 return; 2973 } 2974 2975 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444, 2976 rtd->debugfs_dpcm_root, 2977 rtd, &dpcm_state_fops); 2978 } 2979 #endif 2980