1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // soc-pcm.c -- ALSA SoC PCM 4 // 5 // Copyright 2005 Wolfson Microelectronics PLC. 6 // Copyright 2005 Openedhand Ltd. 7 // Copyright (C) 2010 Slimlogic Ltd. 8 // Copyright (C) 2010 Texas Instruments Inc. 9 // 10 // Authors: Liam Girdwood <lrg@ti.com> 11 // Mark Brown <broonie@opensource.wolfsonmicro.com> 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/pinctrl/consumer.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/slab.h> 19 #include <linux/workqueue.h> 20 #include <linux/export.h> 21 #include <linux/debugfs.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/soc-dpcm.h> 27 #include <sound/initval.h> 28 29 #define DPCM_MAX_BE_USERS 8 30 31 #ifdef CONFIG_DEBUG_FS 32 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 33 { 34 switch (state) { 35 case SND_SOC_DPCM_STATE_NEW: 36 return "new"; 37 case SND_SOC_DPCM_STATE_OPEN: 38 return "open"; 39 case SND_SOC_DPCM_STATE_HW_PARAMS: 40 return "hw_params"; 41 case SND_SOC_DPCM_STATE_PREPARE: 42 return "prepare"; 43 case SND_SOC_DPCM_STATE_START: 44 return "start"; 45 case SND_SOC_DPCM_STATE_STOP: 46 return "stop"; 47 case SND_SOC_DPCM_STATE_SUSPEND: 48 return "suspend"; 49 case SND_SOC_DPCM_STATE_PAUSED: 50 return "paused"; 51 case SND_SOC_DPCM_STATE_HW_FREE: 52 return "hw_free"; 53 case SND_SOC_DPCM_STATE_CLOSE: 54 return "close"; 55 } 56 57 return "unknown"; 58 } 59 60 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 61 int stream, char *buf, size_t size) 62 { 63 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 64 struct snd_soc_dpcm *dpcm; 65 ssize_t offset = 0; 66 unsigned long flags; 67 68 /* FE state */ 69 offset += scnprintf(buf + offset, size - offset, 70 "[%s - %s]\n", fe->dai_link->name, 71 stream ? "Capture" : "Playback"); 72 73 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 74 dpcm_state_string(fe->dpcm[stream].state)); 75 76 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 77 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 78 offset += scnprintf(buf + offset, size - offset, 79 "Hardware Params: " 80 "Format = %s, Channels = %d, Rate = %d\n", 81 snd_pcm_format_name(params_format(params)), 82 params_channels(params), 83 params_rate(params)); 84 85 /* BEs state */ 86 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 87 88 if (list_empty(&fe->dpcm[stream].be_clients)) { 89 offset += scnprintf(buf + offset, size - offset, 90 " No active DSP links\n"); 91 goto out; 92 } 93 94 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 95 for_each_dpcm_be(fe, stream, dpcm) { 96 struct snd_soc_pcm_runtime *be = dpcm->be; 97 params = &dpcm->hw_params; 98 99 offset += scnprintf(buf + offset, size - offset, 100 "- %s\n", be->dai_link->name); 101 102 offset += scnprintf(buf + offset, size - offset, 103 " State: %s\n", 104 dpcm_state_string(be->dpcm[stream].state)); 105 106 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 107 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 108 offset += scnprintf(buf + offset, size - offset, 109 " Hardware Params: " 110 "Format = %s, Channels = %d, Rate = %d\n", 111 snd_pcm_format_name(params_format(params)), 112 params_channels(params), 113 params_rate(params)); 114 } 115 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 116 out: 117 return offset; 118 } 119 120 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 121 size_t count, loff_t *ppos) 122 { 123 struct snd_soc_pcm_runtime *fe = file->private_data; 124 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 125 int stream; 126 char *buf; 127 128 if (fe->num_cpus > 1) { 129 dev_err(fe->dev, 130 "%s doesn't support Multi CPU yet\n", __func__); 131 return -EINVAL; 132 } 133 134 buf = kmalloc(out_count, GFP_KERNEL); 135 if (!buf) 136 return -ENOMEM; 137 138 for_each_pcm_streams(stream) 139 if (snd_soc_dai_stream_valid(fe->cpu_dai, stream)) 140 offset += dpcm_show_state(fe, stream, 141 buf + offset, 142 out_count - offset); 143 144 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 145 146 kfree(buf); 147 return ret; 148 } 149 150 static const struct file_operations dpcm_state_fops = { 151 .open = simple_open, 152 .read = dpcm_state_read_file, 153 .llseek = default_llseek, 154 }; 155 156 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 157 { 158 if (!rtd->dai_link) 159 return; 160 161 if (!rtd->dai_link->dynamic) 162 return; 163 164 if (!rtd->card->debugfs_card_root) 165 return; 166 167 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 168 rtd->card->debugfs_card_root); 169 170 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 171 rtd, &dpcm_state_fops); 172 } 173 174 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 175 { 176 char *name; 177 178 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 179 stream ? "capture" : "playback"); 180 if (name) { 181 dpcm->debugfs_state = debugfs_create_dir( 182 name, dpcm->fe->debugfs_dpcm_root); 183 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 184 &dpcm->state); 185 kfree(name); 186 } 187 } 188 189 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 190 { 191 debugfs_remove_recursive(dpcm->debugfs_state); 192 } 193 194 #else 195 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 196 int stream) 197 { 198 } 199 200 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 201 { 202 } 203 #endif 204 205 static int soc_rtd_startup(struct snd_soc_pcm_runtime *rtd, 206 struct snd_pcm_substream *substream) 207 { 208 if (rtd->dai_link->ops && 209 rtd->dai_link->ops->startup) 210 return rtd->dai_link->ops->startup(substream); 211 return 0; 212 } 213 214 static void soc_rtd_shutdown(struct snd_soc_pcm_runtime *rtd, 215 struct snd_pcm_substream *substream) 216 { 217 if (rtd->dai_link->ops && 218 rtd->dai_link->ops->shutdown) 219 rtd->dai_link->ops->shutdown(substream); 220 } 221 222 static int soc_rtd_prepare(struct snd_soc_pcm_runtime *rtd, 223 struct snd_pcm_substream *substream) 224 { 225 if (rtd->dai_link->ops && 226 rtd->dai_link->ops->prepare) 227 return rtd->dai_link->ops->prepare(substream); 228 return 0; 229 } 230 231 static int soc_rtd_hw_params(struct snd_soc_pcm_runtime *rtd, 232 struct snd_pcm_substream *substream, 233 struct snd_pcm_hw_params *params) 234 { 235 if (rtd->dai_link->ops && 236 rtd->dai_link->ops->hw_params) 237 return rtd->dai_link->ops->hw_params(substream, params); 238 return 0; 239 } 240 241 static void soc_rtd_hw_free(struct snd_soc_pcm_runtime *rtd, 242 struct snd_pcm_substream *substream) 243 { 244 if (rtd->dai_link->ops && 245 rtd->dai_link->ops->hw_free) 246 rtd->dai_link->ops->hw_free(substream); 247 } 248 249 static int soc_rtd_trigger(struct snd_soc_pcm_runtime *rtd, 250 struct snd_pcm_substream *substream, 251 int cmd) 252 { 253 if (rtd->dai_link->ops && 254 rtd->dai_link->ops->trigger) 255 return rtd->dai_link->ops->trigger(substream, cmd); 256 return 0; 257 } 258 259 static void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 260 int stream, int action) 261 { 262 struct snd_soc_dai *dai; 263 int i; 264 265 lockdep_assert_held(&rtd->card->pcm_mutex); 266 267 for_each_rtd_dais(rtd, i, dai) { 268 dai->stream_active[stream] += action; 269 dai->active += action; 270 dai->component->active += action; 271 } 272 } 273 274 /** 275 * snd_soc_runtime_activate() - Increment active count for PCM runtime components 276 * @rtd: ASoC PCM runtime that is activated 277 * @stream: Direction of the PCM stream 278 * 279 * Increments the active count for all the DAIs and components attached to a PCM 280 * runtime. Should typically be called when a stream is opened. 281 * 282 * Must be called with the rtd->card->pcm_mutex being held 283 */ 284 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream) 285 { 286 snd_soc_runtime_action(rtd, stream, 1); 287 } 288 EXPORT_SYMBOL_GPL(snd_soc_runtime_activate); 289 290 /** 291 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components 292 * @rtd: ASoC PCM runtime that is deactivated 293 * @stream: Direction of the PCM stream 294 * 295 * Decrements the active count for all the DAIs and components attached to a PCM 296 * runtime. Should typically be called when a stream is closed. 297 * 298 * Must be called with the rtd->card->pcm_mutex being held 299 */ 300 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream) 301 { 302 snd_soc_runtime_action(rtd, stream, -1); 303 } 304 EXPORT_SYMBOL_GPL(snd_soc_runtime_deactivate); 305 306 /** 307 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 308 * @rtd: The ASoC PCM runtime that should be checked. 309 * 310 * This function checks whether the power down delay should be ignored for a 311 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 312 * been configured to ignore the delay, or if none of the components benefits 313 * from having the delay. 314 */ 315 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 316 { 317 struct snd_soc_component *component; 318 bool ignore = true; 319 int i; 320 321 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 322 return true; 323 324 for_each_rtd_components(rtd, i, component) 325 ignore &= !component->driver->use_pmdown_time; 326 327 return ignore; 328 } 329 330 /** 331 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 332 * @substream: the pcm substream 333 * @hw: the hardware parameters 334 * 335 * Sets the substream runtime hardware parameters. 336 */ 337 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 338 const struct snd_pcm_hardware *hw) 339 { 340 struct snd_pcm_runtime *runtime = substream->runtime; 341 runtime->hw.info = hw->info; 342 runtime->hw.formats = hw->formats; 343 runtime->hw.period_bytes_min = hw->period_bytes_min; 344 runtime->hw.period_bytes_max = hw->period_bytes_max; 345 runtime->hw.periods_min = hw->periods_min; 346 runtime->hw.periods_max = hw->periods_max; 347 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; 348 runtime->hw.fifo_size = hw->fifo_size; 349 return 0; 350 } 351 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 352 353 /* DPCM stream event, send event to FE and all active BEs. */ 354 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 355 int event) 356 { 357 struct snd_soc_dpcm *dpcm; 358 359 for_each_dpcm_be(fe, dir, dpcm) { 360 361 struct snd_soc_pcm_runtime *be = dpcm->be; 362 363 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 364 be->dai_link->name, event, dir); 365 366 if ((event == SND_SOC_DAPM_STREAM_STOP) && 367 (be->dpcm[dir].users >= 1)) 368 continue; 369 370 snd_soc_dapm_stream_event(be, dir, event); 371 } 372 373 snd_soc_dapm_stream_event(fe, dir, event); 374 375 return 0; 376 } 377 378 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 379 struct snd_soc_dai *soc_dai) 380 { 381 struct snd_soc_pcm_runtime *rtd = substream->private_data; 382 int ret; 383 384 if (soc_dai->rate && (soc_dai->driver->symmetric_rates || 385 rtd->dai_link->symmetric_rates)) { 386 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", 387 soc_dai->rate); 388 389 ret = snd_pcm_hw_constraint_single(substream->runtime, 390 SNDRV_PCM_HW_PARAM_RATE, 391 soc_dai->rate); 392 if (ret < 0) { 393 dev_err(soc_dai->dev, 394 "ASoC: Unable to apply rate constraint: %d\n", 395 ret); 396 return ret; 397 } 398 } 399 400 if (soc_dai->channels && (soc_dai->driver->symmetric_channels || 401 rtd->dai_link->symmetric_channels)) { 402 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n", 403 soc_dai->channels); 404 405 ret = snd_pcm_hw_constraint_single(substream->runtime, 406 SNDRV_PCM_HW_PARAM_CHANNELS, 407 soc_dai->channels); 408 if (ret < 0) { 409 dev_err(soc_dai->dev, 410 "ASoC: Unable to apply channel symmetry constraint: %d\n", 411 ret); 412 return ret; 413 } 414 } 415 416 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits || 417 rtd->dai_link->symmetric_samplebits)) { 418 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n", 419 soc_dai->sample_bits); 420 421 ret = snd_pcm_hw_constraint_single(substream->runtime, 422 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 423 soc_dai->sample_bits); 424 if (ret < 0) { 425 dev_err(soc_dai->dev, 426 "ASoC: Unable to apply sample bits symmetry constraint: %d\n", 427 ret); 428 return ret; 429 } 430 } 431 432 return 0; 433 } 434 435 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 436 struct snd_pcm_hw_params *params) 437 { 438 struct snd_soc_pcm_runtime *rtd = substream->private_data; 439 struct snd_soc_dai *dai; 440 struct snd_soc_dai *cpu_dai; 441 unsigned int rate, channels, sample_bits, symmetry, i; 442 443 rate = params_rate(params); 444 channels = params_channels(params); 445 sample_bits = snd_pcm_format_physical_width(params_format(params)); 446 447 /* reject unmatched parameters when applying symmetry */ 448 symmetry = rtd->dai_link->symmetric_rates; 449 450 for_each_rtd_cpu_dais(rtd, i, dai) 451 symmetry |= dai->driver->symmetric_rates; 452 453 if (symmetry) { 454 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 455 if (cpu_dai->rate && cpu_dai->rate != rate) { 456 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n", 457 cpu_dai->rate, rate); 458 return -EINVAL; 459 } 460 } 461 } 462 463 symmetry = rtd->dai_link->symmetric_channels; 464 465 for_each_rtd_dais(rtd, i, dai) 466 symmetry |= dai->driver->symmetric_channels; 467 468 if (symmetry) { 469 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 470 if (cpu_dai->channels && 471 cpu_dai->channels != channels) { 472 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n", 473 cpu_dai->channels, channels); 474 return -EINVAL; 475 } 476 } 477 } 478 479 symmetry = rtd->dai_link->symmetric_samplebits; 480 481 for_each_rtd_dais(rtd, i, dai) 482 symmetry |= dai->driver->symmetric_samplebits; 483 484 if (symmetry) { 485 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 486 if (cpu_dai->sample_bits && 487 cpu_dai->sample_bits != sample_bits) { 488 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n", 489 cpu_dai->sample_bits, sample_bits); 490 return -EINVAL; 491 } 492 } 493 } 494 495 return 0; 496 } 497 498 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream) 499 { 500 struct snd_soc_pcm_runtime *rtd = substream->private_data; 501 struct snd_soc_dai_link *link = rtd->dai_link; 502 struct snd_soc_dai *dai; 503 unsigned int symmetry, i; 504 505 symmetry = link->symmetric_rates || 506 link->symmetric_channels || 507 link->symmetric_samplebits; 508 509 for_each_rtd_dais(rtd, i, dai) 510 symmetry = symmetry || 511 dai->driver->symmetric_rates || 512 dai->driver->symmetric_channels || 513 dai->driver->symmetric_samplebits; 514 515 return symmetry; 516 } 517 518 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 519 { 520 struct snd_soc_pcm_runtime *rtd = substream->private_data; 521 int ret; 522 523 if (!bits) 524 return; 525 526 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 527 if (ret != 0) 528 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 529 bits, ret); 530 } 531 532 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 533 { 534 struct snd_soc_pcm_runtime *rtd = substream->private_data; 535 struct snd_soc_dai *cpu_dai; 536 struct snd_soc_dai *codec_dai; 537 struct snd_soc_pcm_stream *pcm_codec, *pcm_cpu; 538 int stream = substream->stream; 539 int i; 540 unsigned int bits = 0, cpu_bits = 0; 541 542 for_each_rtd_codec_dais(rtd, i, codec_dai) { 543 pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 544 545 if (pcm_codec->sig_bits == 0) { 546 bits = 0; 547 break; 548 } 549 bits = max(pcm_codec->sig_bits, bits); 550 } 551 552 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 553 pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 554 555 if (pcm_cpu->sig_bits == 0) { 556 cpu_bits = 0; 557 break; 558 } 559 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 560 } 561 562 soc_pcm_set_msb(substream, bits); 563 soc_pcm_set_msb(substream, cpu_bits); 564 } 565 566 /** 567 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 568 * @rtd: ASoC PCM runtime 569 * @hw: PCM hardware parameters (output) 570 * @stream: Direction of the PCM stream 571 * 572 * Calculates the subset of stream parameters supported by all DAIs 573 * associated with the PCM stream. 574 */ 575 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 576 struct snd_pcm_hardware *hw, int stream) 577 { 578 struct snd_soc_dai *codec_dai; 579 struct snd_soc_dai *cpu_dai; 580 struct snd_soc_pcm_stream *codec_stream; 581 struct snd_soc_pcm_stream *cpu_stream; 582 unsigned int chan_min = 0, chan_max = UINT_MAX; 583 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 584 unsigned int rate_min = 0, rate_max = UINT_MAX; 585 unsigned int cpu_rate_min = 0, cpu_rate_max = UINT_MAX; 586 unsigned int rates = UINT_MAX, cpu_rates = UINT_MAX; 587 u64 formats = ULLONG_MAX; 588 int i; 589 590 /* first calculate min/max only for CPUs in the DAI link */ 591 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 592 593 /* 594 * Skip CPUs which don't support the current stream type. 595 * Otherwise, since the rate, channel, and format values will 596 * zero in that case, we would have no usable settings left, 597 * causing the resulting setup to fail. 598 */ 599 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 600 continue; 601 602 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 603 604 cpu_chan_min = max(cpu_chan_min, cpu_stream->channels_min); 605 cpu_chan_max = min(cpu_chan_max, cpu_stream->channels_max); 606 cpu_rate_min = max(cpu_rate_min, cpu_stream->rate_min); 607 cpu_rate_max = min_not_zero(cpu_rate_max, cpu_stream->rate_max); 608 formats &= cpu_stream->formats; 609 cpu_rates = snd_pcm_rate_mask_intersect(cpu_stream->rates, 610 cpu_rates); 611 } 612 613 /* second calculate min/max only for CODECs in the DAI link */ 614 for_each_rtd_codec_dais(rtd, i, codec_dai) { 615 616 /* 617 * Skip CODECs which don't support the current stream type. 618 * Otherwise, since the rate, channel, and format values will 619 * zero in that case, we would have no usable settings left, 620 * causing the resulting setup to fail. 621 */ 622 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 623 continue; 624 625 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 626 627 chan_min = max(chan_min, codec_stream->channels_min); 628 chan_max = min(chan_max, codec_stream->channels_max); 629 rate_min = max(rate_min, codec_stream->rate_min); 630 rate_max = min_not_zero(rate_max, codec_stream->rate_max); 631 formats &= codec_stream->formats; 632 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates); 633 } 634 635 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 636 if (!chan_min || !cpu_chan_min) 637 return -EINVAL; 638 639 /* 640 * chan min/max cannot be enforced if there are multiple CODEC DAIs 641 * connected to CPU DAI(s), use CPU DAI's directly and let 642 * channel allocation be fixed up later 643 */ 644 if (rtd->num_codecs > 1) { 645 chan_min = cpu_chan_min; 646 chan_max = cpu_chan_max; 647 } 648 649 /* finally find a intersection between CODECs and CPUs */ 650 hw->channels_min = max(chan_min, cpu_chan_min); 651 hw->channels_max = min(chan_max, cpu_chan_max); 652 hw->formats = formats; 653 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_rates); 654 655 snd_pcm_hw_limit_rates(hw); 656 657 hw->rate_min = max(hw->rate_min, cpu_rate_min); 658 hw->rate_min = max(hw->rate_min, rate_min); 659 hw->rate_max = min_not_zero(hw->rate_max, cpu_rate_max); 660 hw->rate_max = min_not_zero(hw->rate_max, rate_max); 661 662 return 0; 663 } 664 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 665 666 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 667 { 668 struct snd_pcm_hardware *hw = &substream->runtime->hw; 669 struct snd_soc_pcm_runtime *rtd = substream->private_data; 670 u64 formats = hw->formats; 671 672 /* 673 * At least one CPU and one CODEC should match. Otherwise, we should 674 * have bailed out on a higher level, since there would be no CPU or 675 * CODEC to support the transfer direction in that case. 676 */ 677 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 678 679 if (formats) 680 hw->formats &= formats; 681 } 682 683 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 684 { 685 struct snd_soc_pcm_runtime *rtd = substream->private_data; 686 struct snd_soc_component *last = NULL; 687 struct snd_soc_component *component; 688 int i, ret = 0; 689 690 for_each_rtd_components(rtd, i, component) { 691 last = component; 692 693 ret = snd_soc_component_module_get_when_open(component); 694 if (ret < 0) { 695 dev_err(component->dev, 696 "ASoC: can't get module %s\n", 697 component->name); 698 break; 699 } 700 701 ret = snd_soc_component_open(component, substream); 702 if (ret < 0) { 703 snd_soc_component_module_put_when_close(component); 704 dev_err(component->dev, 705 "ASoC: can't open component %s: %d\n", 706 component->name, ret); 707 break; 708 } 709 } 710 711 if (ret < 0) { 712 /* rollback on error */ 713 for_each_rtd_components(rtd, i, component) { 714 if (component == last) 715 break; 716 717 snd_soc_component_close(component, substream); 718 snd_soc_component_module_put_when_close(component); 719 } 720 } 721 722 return ret; 723 } 724 725 static int soc_pcm_components_close(struct snd_pcm_substream *substream) 726 { 727 struct snd_soc_pcm_runtime *rtd = substream->private_data; 728 struct snd_soc_component *component; 729 int i, r, ret = 0; 730 731 for_each_rtd_components(rtd, i, component) { 732 r = snd_soc_component_close(component, substream); 733 if (r < 0) 734 ret = r; /* use last ret */ 735 736 snd_soc_component_module_put_when_close(component); 737 } 738 739 return ret; 740 } 741 742 /* 743 * Called by ALSA when a PCM substream is closed. Private data can be 744 * freed here. The cpu DAI, codec DAI, machine and components are also 745 * shutdown. 746 */ 747 static int soc_pcm_close(struct snd_pcm_substream *substream) 748 { 749 struct snd_soc_pcm_runtime *rtd = substream->private_data; 750 struct snd_soc_component *component; 751 struct snd_soc_dai *dai; 752 int i; 753 754 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 755 756 snd_soc_runtime_deactivate(rtd, substream->stream); 757 758 for_each_rtd_dais(rtd, i, dai) 759 snd_soc_dai_shutdown(dai, substream); 760 761 soc_rtd_shutdown(rtd, substream); 762 763 soc_pcm_components_close(substream); 764 765 snd_soc_dapm_stream_stop(rtd, substream->stream); 766 767 mutex_unlock(&rtd->card->pcm_mutex); 768 769 for_each_rtd_components(rtd, i, component) { 770 pm_runtime_mark_last_busy(component->dev); 771 pm_runtime_put_autosuspend(component->dev); 772 } 773 774 for_each_rtd_components(rtd, i, component) 775 if (!component->active) 776 pinctrl_pm_select_sleep_state(component->dev); 777 778 return 0; 779 } 780 781 /* 782 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 783 * then initialized and any private data can be allocated. This also calls 784 * startup for the cpu DAI, component, machine and codec DAI. 785 */ 786 static int soc_pcm_open(struct snd_pcm_substream *substream) 787 { 788 struct snd_soc_pcm_runtime *rtd = substream->private_data; 789 struct snd_pcm_runtime *runtime = substream->runtime; 790 struct snd_soc_component *component; 791 struct snd_soc_dai *dai; 792 const char *codec_dai_name = "multicodec"; 793 const char *cpu_dai_name = "multicpu"; 794 int i, ret = 0; 795 796 for_each_rtd_components(rtd, i, component) 797 pinctrl_pm_select_default_state(component->dev); 798 799 for_each_rtd_components(rtd, i, component) 800 pm_runtime_get_sync(component->dev); 801 802 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 803 804 ret = soc_pcm_components_open(substream); 805 if (ret < 0) 806 goto component_err; 807 808 ret = soc_rtd_startup(rtd, substream); 809 if (ret < 0) { 810 pr_err("ASoC: %s startup failed: %d\n", 811 rtd->dai_link->name, ret); 812 goto rtd_startup_err; 813 } 814 815 /* startup the audio subsystem */ 816 for_each_rtd_dais(rtd, i, dai) { 817 ret = snd_soc_dai_startup(dai, substream); 818 if (ret < 0) { 819 dev_err(dai->dev, 820 "ASoC: can't open DAI %s: %d\n", 821 dai->name, ret); 822 goto config_err; 823 } 824 825 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 826 dai->tx_mask = 0; 827 else 828 dai->rx_mask = 0; 829 } 830 831 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 832 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 833 goto dynamic; 834 835 /* Check that the codec and cpu DAIs are compatible */ 836 soc_pcm_init_runtime_hw(substream); 837 838 if (rtd->num_codecs == 1) 839 codec_dai_name = rtd->codec_dai->name; 840 841 if (rtd->num_cpus == 1) 842 cpu_dai_name = rtd->cpu_dai->name; 843 844 if (soc_pcm_has_symmetry(substream)) 845 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 846 847 ret = -EINVAL; 848 if (!runtime->hw.rates) { 849 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n", 850 codec_dai_name, cpu_dai_name); 851 goto config_err; 852 } 853 if (!runtime->hw.formats) { 854 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n", 855 codec_dai_name, cpu_dai_name); 856 goto config_err; 857 } 858 if (!runtime->hw.channels_min || !runtime->hw.channels_max || 859 runtime->hw.channels_min > runtime->hw.channels_max) { 860 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n", 861 codec_dai_name, cpu_dai_name); 862 goto config_err; 863 } 864 865 soc_pcm_apply_msb(substream); 866 867 /* Symmetry only applies if we've already got an active stream. */ 868 for_each_rtd_dais(rtd, i, dai) { 869 if (dai->active) { 870 ret = soc_pcm_apply_symmetry(substream, dai); 871 if (ret != 0) 872 goto config_err; 873 } 874 } 875 876 pr_debug("ASoC: %s <-> %s info:\n", 877 codec_dai_name, cpu_dai_name); 878 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates); 879 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min, 880 runtime->hw.channels_max); 881 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min, 882 runtime->hw.rate_max); 883 884 dynamic: 885 886 snd_soc_runtime_activate(rtd, substream->stream); 887 888 mutex_unlock(&rtd->card->pcm_mutex); 889 return 0; 890 891 config_err: 892 for_each_rtd_dais(rtd, i, dai) 893 snd_soc_dai_shutdown(dai, substream); 894 895 soc_rtd_shutdown(rtd, substream); 896 rtd_startup_err: 897 soc_pcm_components_close(substream); 898 component_err: 899 mutex_unlock(&rtd->card->pcm_mutex); 900 901 for_each_rtd_components(rtd, i, component) { 902 pm_runtime_mark_last_busy(component->dev); 903 pm_runtime_put_autosuspend(component->dev); 904 } 905 906 for_each_rtd_components(rtd, i, component) 907 if (!component->active) 908 pinctrl_pm_select_sleep_state(component->dev); 909 910 return ret; 911 } 912 913 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd) 914 { 915 /* 916 * Currently nothing to do for c2c links 917 * Since c2c links are internal nodes in the DAPM graph and 918 * don't interface with the outside world or application layer 919 * we don't have to do any special handling on close. 920 */ 921 } 922 923 /* 924 * Called by ALSA when the PCM substream is prepared, can set format, sample 925 * rate, etc. This function is non atomic and can be called multiple times, 926 * it can refer to the runtime info. 927 */ 928 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 929 { 930 struct snd_soc_pcm_runtime *rtd = substream->private_data; 931 struct snd_soc_component *component; 932 struct snd_soc_dai *dai; 933 int i, ret = 0; 934 935 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 936 937 ret = soc_rtd_prepare(rtd, substream); 938 if (ret < 0) { 939 dev_err(rtd->card->dev, 940 "ASoC: machine prepare error: %d\n", ret); 941 goto out; 942 } 943 944 for_each_rtd_components(rtd, i, component) { 945 ret = snd_soc_component_prepare(component, substream); 946 if (ret < 0) { 947 dev_err(component->dev, 948 "ASoC: platform prepare error: %d\n", ret); 949 goto out; 950 } 951 } 952 953 for_each_rtd_dais(rtd, i, dai) { 954 ret = snd_soc_dai_prepare(dai, substream); 955 if (ret < 0) { 956 dev_err(dai->dev, 957 "ASoC: DAI prepare error: %d\n", ret); 958 goto out; 959 } 960 } 961 962 /* cancel any delayed stream shutdown that is pending */ 963 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 964 rtd->pop_wait) { 965 rtd->pop_wait = 0; 966 cancel_delayed_work(&rtd->delayed_work); 967 } 968 969 snd_soc_dapm_stream_event(rtd, substream->stream, 970 SND_SOC_DAPM_STREAM_START); 971 972 for_each_rtd_dais(rtd, i, dai) 973 snd_soc_dai_digital_mute(dai, 0, substream->stream); 974 975 out: 976 mutex_unlock(&rtd->card->pcm_mutex); 977 return ret; 978 } 979 980 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 981 unsigned int mask) 982 { 983 struct snd_interval *interval; 984 int channels = hweight_long(mask); 985 986 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 987 interval->min = channels; 988 interval->max = channels; 989 } 990 991 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream, 992 struct snd_soc_component *last) 993 { 994 struct snd_soc_pcm_runtime *rtd = substream->private_data; 995 struct snd_soc_component *component; 996 int i, r, ret = 0; 997 998 for_each_rtd_components(rtd, i, component) { 999 if (component == last) 1000 break; 1001 1002 r = snd_soc_component_hw_free(component, substream); 1003 if (r < 0) 1004 ret = r; /* use last ret */ 1005 } 1006 1007 return ret; 1008 } 1009 1010 /* 1011 * Called by ALSA when the hardware params are set by application. This 1012 * function can also be called multiple times and can allocate buffers 1013 * (using snd_pcm_lib_* ). It's non-atomic. 1014 */ 1015 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1016 struct snd_pcm_hw_params *params) 1017 { 1018 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1019 struct snd_soc_component *component; 1020 struct snd_soc_dai *cpu_dai; 1021 struct snd_soc_dai *codec_dai; 1022 int i, ret = 0; 1023 1024 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 1025 1026 ret = soc_pcm_params_symmetry(substream, params); 1027 if (ret) 1028 goto out; 1029 1030 ret = soc_rtd_hw_params(rtd, substream, params); 1031 if (ret < 0) { 1032 dev_err(rtd->card->dev, 1033 "ASoC: machine hw_params failed: %d\n", ret); 1034 goto out; 1035 } 1036 1037 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1038 struct snd_pcm_hw_params codec_params; 1039 1040 /* 1041 * Skip CODECs which don't support the current stream type, 1042 * the idea being that if a CODEC is not used for the currently 1043 * set up transfer direction, it should not need to be 1044 * configured, especially since the configuration used might 1045 * not even be supported by that CODEC. There may be cases 1046 * however where a CODEC needs to be set up although it is 1047 * actually not being used for the transfer, e.g. if a 1048 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1049 * for the DAI link including a playback-only CODEC. 1050 * If this becomes necessary, we will have to augment the 1051 * machine driver setup with information on how to act, so 1052 * we can do the right thing here. 1053 */ 1054 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1055 continue; 1056 1057 /* copy params for each codec */ 1058 codec_params = *params; 1059 1060 /* fixup params based on TDM slot masks */ 1061 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1062 codec_dai->tx_mask) 1063 soc_pcm_codec_params_fixup(&codec_params, 1064 codec_dai->tx_mask); 1065 1066 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 1067 codec_dai->rx_mask) 1068 soc_pcm_codec_params_fixup(&codec_params, 1069 codec_dai->rx_mask); 1070 1071 ret = snd_soc_dai_hw_params(codec_dai, substream, 1072 &codec_params); 1073 if(ret < 0) 1074 goto codec_err; 1075 1076 codec_dai->rate = params_rate(&codec_params); 1077 codec_dai->channels = params_channels(&codec_params); 1078 codec_dai->sample_bits = snd_pcm_format_physical_width( 1079 params_format(&codec_params)); 1080 1081 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 1082 } 1083 1084 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1085 /* 1086 * Skip CPUs which don't support the current stream 1087 * type. See soc_pcm_init_runtime_hw() for more details 1088 */ 1089 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1090 continue; 1091 1092 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 1093 if (ret < 0) 1094 goto interface_err; 1095 1096 /* store the parameters for each DAI */ 1097 cpu_dai->rate = params_rate(params); 1098 cpu_dai->channels = params_channels(params); 1099 cpu_dai->sample_bits = 1100 snd_pcm_format_physical_width(params_format(params)); 1101 1102 snd_soc_dapm_update_dai(substream, params, cpu_dai); 1103 } 1104 1105 for_each_rtd_components(rtd, i, component) { 1106 ret = snd_soc_component_hw_params(component, substream, params); 1107 if (ret < 0) { 1108 dev_err(component->dev, 1109 "ASoC: %s hw params failed: %d\n", 1110 component->name, ret); 1111 goto component_err; 1112 } 1113 } 1114 component = NULL; 1115 1116 out: 1117 mutex_unlock(&rtd->card->pcm_mutex); 1118 return ret; 1119 1120 component_err: 1121 soc_pcm_components_hw_free(substream, component); 1122 1123 i = rtd->num_cpus; 1124 1125 interface_err: 1126 for_each_rtd_cpu_dais_rollback(rtd, i, cpu_dai) { 1127 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1128 continue; 1129 1130 snd_soc_dai_hw_free(cpu_dai, substream); 1131 cpu_dai->rate = 0; 1132 } 1133 1134 i = rtd->num_codecs; 1135 1136 codec_err: 1137 for_each_rtd_codec_dais_rollback(rtd, i, codec_dai) { 1138 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1139 continue; 1140 1141 snd_soc_dai_hw_free(codec_dai, substream); 1142 codec_dai->rate = 0; 1143 } 1144 1145 soc_rtd_hw_free(rtd, substream); 1146 1147 mutex_unlock(&rtd->card->pcm_mutex); 1148 return ret; 1149 } 1150 1151 /* 1152 * Frees resources allocated by hw_params, can be called multiple times 1153 */ 1154 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 1155 { 1156 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1157 struct snd_soc_dai *dai; 1158 int i; 1159 1160 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 1161 1162 /* clear the corresponding DAIs parameters when going to be inactive */ 1163 for_each_rtd_dais(rtd, i, dai) { 1164 int active = dai->stream_active[substream->stream]; 1165 1166 if (dai->active == 1) { 1167 dai->rate = 0; 1168 dai->channels = 0; 1169 dai->sample_bits = 0; 1170 } 1171 1172 if (active == 1) 1173 snd_soc_dai_digital_mute(dai, 1, substream->stream); 1174 } 1175 1176 /* free any machine hw params */ 1177 soc_rtd_hw_free(rtd, substream); 1178 1179 /* free any component resources */ 1180 soc_pcm_components_hw_free(substream, NULL); 1181 1182 /* now free hw params for the DAIs */ 1183 for_each_rtd_dais(rtd, i, dai) { 1184 if (!snd_soc_dai_stream_valid(dai, substream->stream)) 1185 continue; 1186 1187 snd_soc_dai_hw_free(dai, substream); 1188 } 1189 1190 mutex_unlock(&rtd->card->pcm_mutex); 1191 return 0; 1192 } 1193 1194 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd) 1195 { 1196 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1197 struct snd_soc_component *component; 1198 struct snd_soc_dai *dai; 1199 int i, ret; 1200 1201 ret = soc_rtd_trigger(rtd, substream, cmd); 1202 if (ret < 0) 1203 return ret; 1204 1205 for_each_rtd_components(rtd, i, component) { 1206 ret = snd_soc_component_trigger(component, substream, cmd); 1207 if (ret < 0) 1208 return ret; 1209 } 1210 1211 for_each_rtd_dais(rtd, i, dai) { 1212 ret = snd_soc_dai_trigger(dai, substream, cmd); 1213 if (ret < 0) 1214 return ret; 1215 } 1216 1217 return 0; 1218 } 1219 1220 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd) 1221 { 1222 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1223 struct snd_soc_component *component; 1224 struct snd_soc_dai *dai; 1225 int i, ret; 1226 1227 for_each_rtd_dais(rtd, i, dai) { 1228 ret = snd_soc_dai_trigger(dai, substream, cmd); 1229 if (ret < 0) 1230 return ret; 1231 } 1232 1233 for_each_rtd_components(rtd, i, component) { 1234 ret = snd_soc_component_trigger(component, substream, cmd); 1235 if (ret < 0) 1236 return ret; 1237 } 1238 1239 ret = soc_rtd_trigger(rtd, substream, cmd); 1240 if (ret < 0) 1241 return ret; 1242 1243 return 0; 1244 } 1245 1246 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1247 { 1248 int ret; 1249 1250 switch (cmd) { 1251 case SNDRV_PCM_TRIGGER_START: 1252 case SNDRV_PCM_TRIGGER_RESUME: 1253 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1254 ret = soc_pcm_trigger_start(substream, cmd); 1255 break; 1256 case SNDRV_PCM_TRIGGER_STOP: 1257 case SNDRV_PCM_TRIGGER_SUSPEND: 1258 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1259 ret = soc_pcm_trigger_stop(substream, cmd); 1260 break; 1261 default: 1262 return -EINVAL; 1263 } 1264 1265 return ret; 1266 } 1267 1268 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream, 1269 int cmd) 1270 { 1271 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1272 struct snd_soc_dai *dai; 1273 int i, ret; 1274 1275 for_each_rtd_dais(rtd, i, dai) { 1276 ret = snd_soc_dai_bespoke_trigger(dai, substream, cmd); 1277 if (ret < 0) 1278 return ret; 1279 } 1280 1281 return 0; 1282 } 1283 /* 1284 * soc level wrapper for pointer callback 1285 * If cpu_dai, codec_dai, component driver has the delay callback, then 1286 * the runtime->delay will be updated accordingly. 1287 */ 1288 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1289 { 1290 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1291 struct snd_soc_dai *cpu_dai; 1292 struct snd_soc_dai *codec_dai; 1293 struct snd_pcm_runtime *runtime = substream->runtime; 1294 snd_pcm_uframes_t offset = 0; 1295 snd_pcm_sframes_t delay = 0; 1296 snd_pcm_sframes_t codec_delay = 0; 1297 snd_pcm_sframes_t cpu_delay = 0; 1298 int i; 1299 1300 /* clearing the previous total delay */ 1301 runtime->delay = 0; 1302 1303 offset = snd_soc_pcm_component_pointer(substream); 1304 1305 /* base delay if assigned in pointer callback */ 1306 delay = runtime->delay; 1307 1308 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1309 cpu_delay = max(cpu_delay, 1310 snd_soc_dai_delay(cpu_dai, substream)); 1311 } 1312 delay += cpu_delay; 1313 1314 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1315 codec_delay = max(codec_delay, 1316 snd_soc_dai_delay(codec_dai, substream)); 1317 } 1318 delay += codec_delay; 1319 1320 runtime->delay = delay; 1321 1322 return offset; 1323 } 1324 1325 /* connect a FE and BE */ 1326 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1327 struct snd_soc_pcm_runtime *be, int stream) 1328 { 1329 struct snd_soc_dpcm *dpcm; 1330 unsigned long flags; 1331 1332 /* only add new dpcms */ 1333 for_each_dpcm_be(fe, stream, dpcm) { 1334 if (dpcm->be == be && dpcm->fe == fe) 1335 return 0; 1336 } 1337 1338 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1339 if (!dpcm) 1340 return -ENOMEM; 1341 1342 dpcm->be = be; 1343 dpcm->fe = fe; 1344 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1345 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1346 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1347 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1348 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1349 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1350 1351 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1352 stream ? "capture" : "playback", fe->dai_link->name, 1353 stream ? "<-" : "->", be->dai_link->name); 1354 1355 dpcm_create_debugfs_state(dpcm, stream); 1356 1357 return 1; 1358 } 1359 1360 /* reparent a BE onto another FE */ 1361 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1362 struct snd_soc_pcm_runtime *be, int stream) 1363 { 1364 struct snd_soc_dpcm *dpcm; 1365 struct snd_pcm_substream *fe_substream, *be_substream; 1366 1367 /* reparent if BE is connected to other FEs */ 1368 if (!be->dpcm[stream].users) 1369 return; 1370 1371 be_substream = snd_soc_dpcm_get_substream(be, stream); 1372 1373 for_each_dpcm_fe(be, stream, dpcm) { 1374 if (dpcm->fe == fe) 1375 continue; 1376 1377 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1378 stream ? "capture" : "playback", 1379 dpcm->fe->dai_link->name, 1380 stream ? "<-" : "->", dpcm->be->dai_link->name); 1381 1382 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1383 be_substream->runtime = fe_substream->runtime; 1384 break; 1385 } 1386 } 1387 1388 /* disconnect a BE and FE */ 1389 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1390 { 1391 struct snd_soc_dpcm *dpcm, *d; 1392 unsigned long flags; 1393 1394 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1395 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1396 stream ? "capture" : "playback", 1397 dpcm->be->dai_link->name); 1398 1399 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1400 continue; 1401 1402 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1403 stream ? "capture" : "playback", fe->dai_link->name, 1404 stream ? "<-" : "->", dpcm->be->dai_link->name); 1405 1406 /* BEs still alive need new FE */ 1407 dpcm_be_reparent(fe, dpcm->be, stream); 1408 1409 dpcm_remove_debugfs_state(dpcm); 1410 1411 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1412 list_del(&dpcm->list_be); 1413 list_del(&dpcm->list_fe); 1414 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1415 kfree(dpcm); 1416 } 1417 } 1418 1419 /* get BE for DAI widget and stream */ 1420 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1421 struct snd_soc_dapm_widget *widget, int stream) 1422 { 1423 struct snd_soc_pcm_runtime *be; 1424 struct snd_soc_dapm_widget *w; 1425 struct snd_soc_dai *dai; 1426 int i; 1427 1428 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1429 1430 for_each_card_rtds(card, be) { 1431 1432 if (!be->dai_link->no_pcm) 1433 continue; 1434 1435 for_each_rtd_dais(be, i, dai) { 1436 w = snd_soc_dai_get_widget(dai, stream); 1437 1438 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1439 w ? w->name : "(not set)"); 1440 1441 if (w == widget) 1442 return be; 1443 } 1444 } 1445 1446 /* Widget provided is not a BE */ 1447 return NULL; 1448 } 1449 1450 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1451 struct snd_soc_dapm_widget *widget) 1452 { 1453 struct snd_soc_dapm_widget *w; 1454 int i; 1455 1456 for_each_dapm_widgets(list, i, w) 1457 if (widget == w) 1458 return 1; 1459 1460 return 0; 1461 } 1462 1463 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, 1464 enum snd_soc_dapm_direction dir) 1465 { 1466 struct snd_soc_card *card = widget->dapm->card; 1467 struct snd_soc_pcm_runtime *rtd; 1468 int stream; 1469 1470 /* adjust dir to stream */ 1471 if (dir == SND_SOC_DAPM_DIR_OUT) 1472 stream = SNDRV_PCM_STREAM_PLAYBACK; 1473 else 1474 stream = SNDRV_PCM_STREAM_CAPTURE; 1475 1476 rtd = dpcm_get_be(card, widget, stream); 1477 if (rtd) 1478 return true; 1479 1480 return false; 1481 } 1482 1483 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1484 int stream, struct snd_soc_dapm_widget_list **list) 1485 { 1486 struct snd_soc_dai *cpu_dai = fe->cpu_dai; 1487 int paths; 1488 1489 if (fe->num_cpus > 1) { 1490 dev_err(fe->dev, 1491 "%s doesn't support Multi CPU yet\n", __func__); 1492 return -EINVAL; 1493 } 1494 1495 /* get number of valid DAI paths and their widgets */ 1496 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1497 dpcm_end_walk_at_be); 1498 1499 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1500 stream ? "capture" : "playback"); 1501 1502 return paths; 1503 } 1504 1505 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1506 { 1507 snd_soc_dapm_dai_free_widgets(list); 1508 } 1509 1510 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1511 struct snd_soc_dapm_widget_list *list) 1512 { 1513 struct snd_soc_dapm_widget *widget; 1514 struct snd_soc_dai *dai; 1515 unsigned int i; 1516 1517 /* is there a valid DAI widget for this BE */ 1518 for_each_rtd_dais(dpcm->be, i, dai) { 1519 widget = snd_soc_dai_get_widget(dai, stream); 1520 1521 /* 1522 * The BE is pruned only if none of the dai 1523 * widgets are in the active list. 1524 */ 1525 if (widget && widget_in_list(list, widget)) 1526 return true; 1527 } 1528 1529 return false; 1530 } 1531 1532 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1533 struct snd_soc_dapm_widget_list **list_) 1534 { 1535 struct snd_soc_dpcm *dpcm; 1536 int prune = 0; 1537 1538 /* Destroy any old FE <--> BE connections */ 1539 for_each_dpcm_be(fe, stream, dpcm) { 1540 if (dpcm_be_is_active(dpcm, stream, *list_)) 1541 continue; 1542 1543 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1544 stream ? "capture" : "playback", 1545 dpcm->be->dai_link->name, fe->dai_link->name); 1546 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1547 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1548 prune++; 1549 } 1550 1551 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1552 return prune; 1553 } 1554 1555 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1556 struct snd_soc_dapm_widget_list **list_) 1557 { 1558 struct snd_soc_card *card = fe->card; 1559 struct snd_soc_dapm_widget_list *list = *list_; 1560 struct snd_soc_pcm_runtime *be; 1561 struct snd_soc_dapm_widget *widget; 1562 int i, new = 0, err; 1563 1564 /* Create any new FE <--> BE connections */ 1565 for_each_dapm_widgets(list, i, widget) { 1566 1567 switch (widget->id) { 1568 case snd_soc_dapm_dai_in: 1569 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1570 continue; 1571 break; 1572 case snd_soc_dapm_dai_out: 1573 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1574 continue; 1575 break; 1576 default: 1577 continue; 1578 } 1579 1580 /* is there a valid BE rtd for this widget */ 1581 be = dpcm_get_be(card, widget, stream); 1582 if (!be) { 1583 dev_err(fe->dev, "ASoC: no BE found for %s\n", 1584 widget->name); 1585 continue; 1586 } 1587 1588 /* don't connect if FE is not running */ 1589 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1590 continue; 1591 1592 /* newly connected FE and BE */ 1593 err = dpcm_be_connect(fe, be, stream); 1594 if (err < 0) { 1595 dev_err(fe->dev, "ASoC: can't connect %s\n", 1596 widget->name); 1597 break; 1598 } else if (err == 0) /* already connected */ 1599 continue; 1600 1601 /* new */ 1602 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; 1603 new++; 1604 } 1605 1606 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1607 return new; 1608 } 1609 1610 /* 1611 * Find the corresponding BE DAIs that source or sink audio to this 1612 * FE substream. 1613 */ 1614 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1615 int stream, struct snd_soc_dapm_widget_list **list, int new) 1616 { 1617 if (new) 1618 return dpcm_add_paths(fe, stream, list); 1619 else 1620 return dpcm_prune_paths(fe, stream, list); 1621 } 1622 1623 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1624 { 1625 struct snd_soc_dpcm *dpcm; 1626 unsigned long flags; 1627 1628 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1629 for_each_dpcm_be(fe, stream, dpcm) 1630 dpcm->be->dpcm[stream].runtime_update = 1631 SND_SOC_DPCM_UPDATE_NO; 1632 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1633 } 1634 1635 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, 1636 int stream) 1637 { 1638 struct snd_soc_dpcm *dpcm; 1639 1640 /* disable any enabled and non active backends */ 1641 for_each_dpcm_be(fe, stream, dpcm) { 1642 1643 struct snd_soc_pcm_runtime *be = dpcm->be; 1644 struct snd_pcm_substream *be_substream = 1645 snd_soc_dpcm_get_substream(be, stream); 1646 1647 if (be->dpcm[stream].users == 0) 1648 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1649 stream ? "capture" : "playback", 1650 be->dpcm[stream].state); 1651 1652 if (--be->dpcm[stream].users != 0) 1653 continue; 1654 1655 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1656 continue; 1657 1658 soc_pcm_close(be_substream); 1659 be_substream->runtime = NULL; 1660 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1661 } 1662 } 1663 1664 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1665 { 1666 struct snd_soc_dpcm *dpcm; 1667 int err, count = 0; 1668 1669 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1670 for_each_dpcm_be(fe, stream, dpcm) { 1671 1672 struct snd_soc_pcm_runtime *be = dpcm->be; 1673 struct snd_pcm_substream *be_substream = 1674 snd_soc_dpcm_get_substream(be, stream); 1675 1676 if (!be_substream) { 1677 dev_err(be->dev, "ASoC: no backend %s stream\n", 1678 stream ? "capture" : "playback"); 1679 continue; 1680 } 1681 1682 /* is this op for this BE ? */ 1683 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1684 continue; 1685 1686 /* first time the dpcm is open ? */ 1687 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) 1688 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1689 stream ? "capture" : "playback", 1690 be->dpcm[stream].state); 1691 1692 if (be->dpcm[stream].users++ != 0) 1693 continue; 1694 1695 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1696 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1697 continue; 1698 1699 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1700 stream ? "capture" : "playback", be->dai_link->name); 1701 1702 be_substream->runtime = be->dpcm[stream].runtime; 1703 err = soc_pcm_open(be_substream); 1704 if (err < 0) { 1705 dev_err(be->dev, "ASoC: BE open failed %d\n", err); 1706 be->dpcm[stream].users--; 1707 if (be->dpcm[stream].users < 0) 1708 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1709 stream ? "capture" : "playback", 1710 be->dpcm[stream].state); 1711 1712 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1713 goto unwind; 1714 } 1715 1716 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1717 count++; 1718 } 1719 1720 return count; 1721 1722 unwind: 1723 /* disable any enabled and non active backends */ 1724 for_each_dpcm_be_rollback(fe, stream, dpcm) { 1725 struct snd_soc_pcm_runtime *be = dpcm->be; 1726 struct snd_pcm_substream *be_substream = 1727 snd_soc_dpcm_get_substream(be, stream); 1728 1729 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1730 continue; 1731 1732 if (be->dpcm[stream].users == 0) 1733 dev_err(be->dev, "ASoC: no users %s at close %d\n", 1734 stream ? "capture" : "playback", 1735 be->dpcm[stream].state); 1736 1737 if (--be->dpcm[stream].users != 0) 1738 continue; 1739 1740 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) 1741 continue; 1742 1743 soc_pcm_close(be_substream); 1744 be_substream->runtime = NULL; 1745 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1746 } 1747 1748 return err; 1749 } 1750 1751 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, 1752 struct snd_soc_pcm_stream *stream) 1753 { 1754 runtime->hw.rate_min = stream->rate_min; 1755 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX); 1756 runtime->hw.channels_min = stream->channels_min; 1757 runtime->hw.channels_max = stream->channels_max; 1758 if (runtime->hw.formats) 1759 runtime->hw.formats &= stream->formats; 1760 else 1761 runtime->hw.formats = stream->formats; 1762 runtime->hw.rates = stream->rates; 1763 } 1764 1765 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream, 1766 u64 *formats) 1767 { 1768 struct snd_soc_pcm_runtime *fe = substream->private_data; 1769 struct snd_soc_dpcm *dpcm; 1770 struct snd_soc_dai *dai; 1771 int stream = substream->stream; 1772 1773 if (!fe->dai_link->dpcm_merged_format) 1774 return; 1775 1776 /* 1777 * It returns merged BE codec format 1778 * if FE want to use it (= dpcm_merged_format) 1779 */ 1780 1781 for_each_dpcm_be(fe, stream, dpcm) { 1782 struct snd_soc_pcm_runtime *be = dpcm->be; 1783 struct snd_soc_pcm_stream *codec_stream; 1784 int i; 1785 1786 for_each_rtd_codec_dais(be, i, dai) { 1787 /* 1788 * Skip CODECs which don't support the current stream 1789 * type. See soc_pcm_init_runtime_hw() for more details 1790 */ 1791 if (!snd_soc_dai_stream_valid(dai, stream)) 1792 continue; 1793 1794 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1795 1796 *formats &= codec_stream->formats; 1797 } 1798 } 1799 } 1800 1801 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream, 1802 unsigned int *channels_min, 1803 unsigned int *channels_max) 1804 { 1805 struct snd_soc_pcm_runtime *fe = substream->private_data; 1806 struct snd_soc_dpcm *dpcm; 1807 int stream = substream->stream; 1808 1809 if (!fe->dai_link->dpcm_merged_chan) 1810 return; 1811 1812 /* 1813 * It returns merged BE codec channel; 1814 * if FE want to use it (= dpcm_merged_chan) 1815 */ 1816 1817 for_each_dpcm_be(fe, stream, dpcm) { 1818 struct snd_soc_pcm_runtime *be = dpcm->be; 1819 struct snd_soc_pcm_stream *codec_stream; 1820 struct snd_soc_pcm_stream *cpu_stream; 1821 struct snd_soc_dai *dai; 1822 int i; 1823 1824 for_each_rtd_cpu_dais(be, i, dai) { 1825 /* 1826 * Skip CPUs which don't support the current stream 1827 * type. See soc_pcm_init_runtime_hw() for more details 1828 */ 1829 if (!snd_soc_dai_stream_valid(dai, stream)) 1830 continue; 1831 1832 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1833 1834 *channels_min = max(*channels_min, 1835 cpu_stream->channels_min); 1836 *channels_max = min(*channels_max, 1837 cpu_stream->channels_max); 1838 } 1839 1840 /* 1841 * chan min/max cannot be enforced if there are multiple CODEC 1842 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1843 */ 1844 if (be->num_codecs == 1) { 1845 codec_stream = snd_soc_dai_get_pcm_stream(be->codec_dais[0], stream); 1846 1847 *channels_min = max(*channels_min, 1848 codec_stream->channels_min); 1849 *channels_max = min(*channels_max, 1850 codec_stream->channels_max); 1851 } 1852 } 1853 } 1854 1855 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream, 1856 unsigned int *rates, 1857 unsigned int *rate_min, 1858 unsigned int *rate_max) 1859 { 1860 struct snd_soc_pcm_runtime *fe = substream->private_data; 1861 struct snd_soc_dpcm *dpcm; 1862 int stream = substream->stream; 1863 1864 if (!fe->dai_link->dpcm_merged_rate) 1865 return; 1866 1867 /* 1868 * It returns merged BE codec channel; 1869 * if FE want to use it (= dpcm_merged_chan) 1870 */ 1871 1872 for_each_dpcm_be(fe, stream, dpcm) { 1873 struct snd_soc_pcm_runtime *be = dpcm->be; 1874 struct snd_soc_pcm_stream *pcm; 1875 struct snd_soc_dai *dai; 1876 int i; 1877 1878 for_each_rtd_dais(be, i, dai) { 1879 /* 1880 * Skip DAIs which don't support the current stream 1881 * type. See soc_pcm_init_runtime_hw() for more details 1882 */ 1883 if (!snd_soc_dai_stream_valid(dai, stream)) 1884 continue; 1885 1886 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1887 1888 *rate_min = max(*rate_min, pcm->rate_min); 1889 *rate_max = min_not_zero(*rate_max, pcm->rate_max); 1890 *rates = snd_pcm_rate_mask_intersect(*rates, pcm->rates); 1891 } 1892 } 1893 } 1894 1895 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) 1896 { 1897 struct snd_pcm_runtime *runtime = substream->runtime; 1898 struct snd_soc_pcm_runtime *rtd = substream->private_data; 1899 struct snd_soc_dai *cpu_dai; 1900 int i; 1901 1902 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1903 /* 1904 * Skip CPUs which don't support the current stream 1905 * type. See soc_pcm_init_runtime_hw() for more details 1906 */ 1907 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1908 continue; 1909 1910 dpcm_init_runtime_hw(runtime, 1911 snd_soc_dai_get_pcm_stream(cpu_dai, 1912 substream->stream)); 1913 } 1914 1915 dpcm_runtime_merge_format(substream, &runtime->hw.formats); 1916 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min, 1917 &runtime->hw.channels_max); 1918 dpcm_runtime_merge_rate(substream, &runtime->hw.rates, 1919 &runtime->hw.rate_min, &runtime->hw.rate_max); 1920 } 1921 1922 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 1923 1924 /* Set FE's runtime_update state; the state is protected via PCM stream lock 1925 * for avoiding the race with trigger callback. 1926 * If the state is unset and a trigger is pending while the previous operation, 1927 * process the pending trigger action here. 1928 */ 1929 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 1930 int stream, enum snd_soc_dpcm_update state) 1931 { 1932 struct snd_pcm_substream *substream = 1933 snd_soc_dpcm_get_substream(fe, stream); 1934 1935 snd_pcm_stream_lock_irq(substream); 1936 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 1937 dpcm_fe_dai_do_trigger(substream, 1938 fe->dpcm[stream].trigger_pending - 1); 1939 fe->dpcm[stream].trigger_pending = 0; 1940 } 1941 fe->dpcm[stream].runtime_update = state; 1942 snd_pcm_stream_unlock_irq(substream); 1943 } 1944 1945 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1946 int stream) 1947 { 1948 struct snd_soc_dpcm *dpcm; 1949 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 1950 struct snd_soc_dai *fe_cpu_dai; 1951 int err; 1952 int i; 1953 1954 /* apply symmetry for FE */ 1955 if (soc_pcm_has_symmetry(fe_substream)) 1956 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1957 1958 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1959 /* Symmetry only applies if we've got an active stream. */ 1960 if (fe_cpu_dai->active) { 1961 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1962 if (err < 0) 1963 return err; 1964 } 1965 } 1966 1967 /* apply symmetry for BE */ 1968 for_each_dpcm_be(fe, stream, dpcm) { 1969 struct snd_soc_pcm_runtime *be = dpcm->be; 1970 struct snd_pcm_substream *be_substream = 1971 snd_soc_dpcm_get_substream(be, stream); 1972 struct snd_soc_pcm_runtime *rtd; 1973 struct snd_soc_dai *dai; 1974 int i; 1975 1976 /* A backend may not have the requested substream */ 1977 if (!be_substream) 1978 continue; 1979 1980 rtd = be_substream->private_data; 1981 if (rtd->dai_link->be_hw_params_fixup) 1982 continue; 1983 1984 if (soc_pcm_has_symmetry(be_substream)) 1985 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 1986 1987 /* Symmetry only applies if we've got an active stream. */ 1988 for_each_rtd_dais(rtd, i, dai) { 1989 if (dai->active) { 1990 err = soc_pcm_apply_symmetry(fe_substream, dai); 1991 if (err < 0) 1992 return err; 1993 } 1994 } 1995 } 1996 1997 return 0; 1998 } 1999 2000 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 2001 { 2002 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2003 struct snd_pcm_runtime *runtime = fe_substream->runtime; 2004 int stream = fe_substream->stream, ret = 0; 2005 2006 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2007 2008 ret = dpcm_be_dai_startup(fe, stream); 2009 if (ret < 0) { 2010 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); 2011 goto be_err; 2012 } 2013 2014 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 2015 2016 /* start the DAI frontend */ 2017 ret = soc_pcm_open(fe_substream); 2018 if (ret < 0) { 2019 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); 2020 goto unwind; 2021 } 2022 2023 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 2024 2025 dpcm_set_fe_runtime(fe_substream); 2026 snd_pcm_limit_hw_rates(runtime); 2027 2028 ret = dpcm_apply_symmetry(fe_substream, stream); 2029 if (ret < 0) 2030 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n", 2031 ret); 2032 2033 unwind: 2034 if (ret < 0) 2035 dpcm_be_dai_startup_unwind(fe, stream); 2036 be_err: 2037 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2038 return ret; 2039 } 2040 2041 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2042 { 2043 struct snd_soc_dpcm *dpcm; 2044 2045 /* only shutdown BEs that are either sinks or sources to this FE DAI */ 2046 for_each_dpcm_be(fe, stream, dpcm) { 2047 2048 struct snd_soc_pcm_runtime *be = dpcm->be; 2049 struct snd_pcm_substream *be_substream = 2050 snd_soc_dpcm_get_substream(be, stream); 2051 2052 /* is this op for this BE ? */ 2053 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2054 continue; 2055 2056 if (be->dpcm[stream].users == 0) 2057 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 2058 stream ? "capture" : "playback", 2059 be->dpcm[stream].state); 2060 2061 if (--be->dpcm[stream].users != 0) 2062 continue; 2063 2064 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2065 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) { 2066 soc_pcm_hw_free(be_substream); 2067 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2068 } 2069 2070 dev_dbg(be->dev, "ASoC: close BE %s\n", 2071 be->dai_link->name); 2072 2073 soc_pcm_close(be_substream); 2074 be_substream->runtime = NULL; 2075 2076 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2077 } 2078 return 0; 2079 } 2080 2081 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 2082 { 2083 struct snd_soc_pcm_runtime *fe = substream->private_data; 2084 int stream = substream->stream; 2085 2086 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2087 2088 /* shutdown the BEs */ 2089 dpcm_be_dai_shutdown(fe, stream); 2090 2091 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 2092 2093 /* now shutdown the frontend */ 2094 soc_pcm_close(substream); 2095 2096 /* run the stream event for each BE */ 2097 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 2098 2099 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2100 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2101 return 0; 2102 } 2103 2104 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 2105 { 2106 struct snd_soc_dpcm *dpcm; 2107 2108 /* only hw_params backends that are either sinks or sources 2109 * to this frontend DAI */ 2110 for_each_dpcm_be(fe, stream, dpcm) { 2111 2112 struct snd_soc_pcm_runtime *be = dpcm->be; 2113 struct snd_pcm_substream *be_substream = 2114 snd_soc_dpcm_get_substream(be, stream); 2115 2116 /* is this op for this BE ? */ 2117 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2118 continue; 2119 2120 /* only free hw when no longer used - check all FEs */ 2121 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2122 continue; 2123 2124 /* do not free hw if this BE is used by other FE */ 2125 if (be->dpcm[stream].users > 1) 2126 continue; 2127 2128 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2129 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2130 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2131 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2132 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2133 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2134 continue; 2135 2136 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2137 be->dai_link->name); 2138 2139 soc_pcm_hw_free(be_substream); 2140 2141 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2142 } 2143 2144 return 0; 2145 } 2146 2147 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2148 { 2149 struct snd_soc_pcm_runtime *fe = substream->private_data; 2150 int err, stream = substream->stream; 2151 2152 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2153 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2154 2155 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2156 2157 /* call hw_free on the frontend */ 2158 err = soc_pcm_hw_free(substream); 2159 if (err < 0) 2160 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", 2161 fe->dai_link->name); 2162 2163 /* only hw_params backends that are either sinks or sources 2164 * to this frontend DAI */ 2165 err = dpcm_be_dai_hw_free(fe, stream); 2166 2167 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2168 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2169 2170 mutex_unlock(&fe->card->mutex); 2171 return 0; 2172 } 2173 2174 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2175 { 2176 struct snd_soc_dpcm *dpcm; 2177 int ret; 2178 2179 for_each_dpcm_be(fe, stream, dpcm) { 2180 2181 struct snd_soc_pcm_runtime *be = dpcm->be; 2182 struct snd_pcm_substream *be_substream = 2183 snd_soc_dpcm_get_substream(be, stream); 2184 2185 /* is this op for this BE ? */ 2186 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2187 continue; 2188 2189 /* copy params for each dpcm */ 2190 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 2191 sizeof(struct snd_pcm_hw_params)); 2192 2193 /* perform any hw_params fixups */ 2194 if (be->dai_link->be_hw_params_fixup) { 2195 ret = be->dai_link->be_hw_params_fixup(be, 2196 &dpcm->hw_params); 2197 if (ret < 0) { 2198 dev_err(be->dev, 2199 "ASoC: hw_params BE fixup failed %d\n", 2200 ret); 2201 goto unwind; 2202 } 2203 } 2204 2205 /* copy the fixed-up hw params for BE dai */ 2206 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 2207 sizeof(struct snd_pcm_hw_params)); 2208 2209 /* only allow hw_params() if no connected FEs are running */ 2210 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2211 continue; 2212 2213 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2214 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2215 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2216 continue; 2217 2218 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2219 be->dai_link->name); 2220 2221 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 2222 if (ret < 0) { 2223 dev_err(dpcm->be->dev, 2224 "ASoC: hw_params BE failed %d\n", ret); 2225 goto unwind; 2226 } 2227 2228 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2229 } 2230 return 0; 2231 2232 unwind: 2233 /* disable any enabled and non active backends */ 2234 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2235 struct snd_soc_pcm_runtime *be = dpcm->be; 2236 struct snd_pcm_substream *be_substream = 2237 snd_soc_dpcm_get_substream(be, stream); 2238 2239 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2240 continue; 2241 2242 /* only allow hw_free() if no connected FEs are running */ 2243 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2244 continue; 2245 2246 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2247 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2248 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2249 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2250 continue; 2251 2252 soc_pcm_hw_free(be_substream); 2253 } 2254 2255 return ret; 2256 } 2257 2258 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2259 struct snd_pcm_hw_params *params) 2260 { 2261 struct snd_soc_pcm_runtime *fe = substream->private_data; 2262 int ret, stream = substream->stream; 2263 2264 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2265 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2266 2267 memcpy(&fe->dpcm[stream].hw_params, params, 2268 sizeof(struct snd_pcm_hw_params)); 2269 ret = dpcm_be_dai_hw_params(fe, stream); 2270 if (ret < 0) { 2271 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); 2272 goto out; 2273 } 2274 2275 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2276 fe->dai_link->name, params_rate(params), 2277 params_channels(params), params_format(params)); 2278 2279 /* call hw_params on the frontend */ 2280 ret = soc_pcm_hw_params(substream, params); 2281 if (ret < 0) { 2282 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); 2283 dpcm_be_dai_hw_free(fe, stream); 2284 } else 2285 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2286 2287 out: 2288 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2289 mutex_unlock(&fe->card->mutex); 2290 return ret; 2291 } 2292 2293 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, 2294 struct snd_pcm_substream *substream, int cmd) 2295 { 2296 int ret; 2297 2298 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", 2299 dpcm->be->dai_link->name, cmd); 2300 2301 ret = soc_pcm_trigger(substream, cmd); 2302 if (ret < 0) 2303 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); 2304 2305 return ret; 2306 } 2307 2308 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2309 int cmd) 2310 { 2311 struct snd_soc_dpcm *dpcm; 2312 int ret = 0; 2313 2314 for_each_dpcm_be(fe, stream, dpcm) { 2315 2316 struct snd_soc_pcm_runtime *be = dpcm->be; 2317 struct snd_pcm_substream *be_substream = 2318 snd_soc_dpcm_get_substream(be, stream); 2319 2320 /* is this op for this BE ? */ 2321 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2322 continue; 2323 2324 switch (cmd) { 2325 case SNDRV_PCM_TRIGGER_START: 2326 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2327 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2328 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2329 continue; 2330 2331 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2332 if (ret) 2333 return ret; 2334 2335 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2336 break; 2337 case SNDRV_PCM_TRIGGER_RESUME: 2338 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2339 continue; 2340 2341 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2342 if (ret) 2343 return ret; 2344 2345 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2346 break; 2347 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2348 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2349 continue; 2350 2351 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2352 if (ret) 2353 return ret; 2354 2355 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2356 break; 2357 case SNDRV_PCM_TRIGGER_STOP: 2358 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2359 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2360 continue; 2361 2362 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2363 continue; 2364 2365 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2366 if (ret) 2367 return ret; 2368 2369 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2370 break; 2371 case SNDRV_PCM_TRIGGER_SUSPEND: 2372 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2373 continue; 2374 2375 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2376 continue; 2377 2378 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2379 if (ret) 2380 return ret; 2381 2382 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2383 break; 2384 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2385 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2386 continue; 2387 2388 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2389 continue; 2390 2391 ret = dpcm_do_trigger(dpcm, be_substream, cmd); 2392 if (ret) 2393 return ret; 2394 2395 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2396 break; 2397 } 2398 } 2399 2400 return ret; 2401 } 2402 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2403 2404 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2405 int cmd, bool fe_first) 2406 { 2407 struct snd_soc_pcm_runtime *fe = substream->private_data; 2408 int ret; 2409 2410 /* call trigger on the frontend before the backend. */ 2411 if (fe_first) { 2412 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2413 fe->dai_link->name, cmd); 2414 2415 ret = soc_pcm_trigger(substream, cmd); 2416 if (ret < 0) 2417 return ret; 2418 2419 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2420 return ret; 2421 } 2422 2423 /* call trigger on the frontend after the backend. */ 2424 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2425 if (ret < 0) 2426 return ret; 2427 2428 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2429 fe->dai_link->name, cmd); 2430 2431 ret = soc_pcm_trigger(substream, cmd); 2432 2433 return ret; 2434 } 2435 2436 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2437 { 2438 struct snd_soc_pcm_runtime *fe = substream->private_data; 2439 int stream = substream->stream; 2440 int ret = 0; 2441 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2442 2443 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2444 2445 switch (trigger) { 2446 case SND_SOC_DPCM_TRIGGER_PRE: 2447 switch (cmd) { 2448 case SNDRV_PCM_TRIGGER_START: 2449 case SNDRV_PCM_TRIGGER_RESUME: 2450 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2451 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2452 break; 2453 case SNDRV_PCM_TRIGGER_STOP: 2454 case SNDRV_PCM_TRIGGER_SUSPEND: 2455 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2456 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2457 break; 2458 default: 2459 ret = -EINVAL; 2460 break; 2461 } 2462 break; 2463 case SND_SOC_DPCM_TRIGGER_POST: 2464 switch (cmd) { 2465 case SNDRV_PCM_TRIGGER_START: 2466 case SNDRV_PCM_TRIGGER_RESUME: 2467 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2468 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2469 break; 2470 case SNDRV_PCM_TRIGGER_STOP: 2471 case SNDRV_PCM_TRIGGER_SUSPEND: 2472 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2473 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2474 break; 2475 default: 2476 ret = -EINVAL; 2477 break; 2478 } 2479 break; 2480 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2481 /* bespoke trigger() - handles both FE and BEs */ 2482 2483 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2484 fe->dai_link->name, cmd); 2485 2486 ret = soc_pcm_bespoke_trigger(substream, cmd); 2487 break; 2488 default: 2489 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2490 fe->dai_link->name); 2491 ret = -EINVAL; 2492 goto out; 2493 } 2494 2495 if (ret < 0) { 2496 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2497 cmd, ret); 2498 goto out; 2499 } 2500 2501 switch (cmd) { 2502 case SNDRV_PCM_TRIGGER_START: 2503 case SNDRV_PCM_TRIGGER_RESUME: 2504 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2505 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2506 break; 2507 case SNDRV_PCM_TRIGGER_STOP: 2508 case SNDRV_PCM_TRIGGER_SUSPEND: 2509 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2510 break; 2511 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2512 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2513 break; 2514 } 2515 2516 out: 2517 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2518 return ret; 2519 } 2520 2521 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2522 { 2523 struct snd_soc_pcm_runtime *fe = substream->private_data; 2524 int stream = substream->stream; 2525 2526 /* if FE's runtime_update is already set, we're in race; 2527 * process this trigger later at exit 2528 */ 2529 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2530 fe->dpcm[stream].trigger_pending = cmd + 1; 2531 return 0; /* delayed, assuming it's successful */ 2532 } 2533 2534 /* we're alone, let's trigger */ 2535 return dpcm_fe_dai_do_trigger(substream, cmd); 2536 } 2537 2538 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2539 { 2540 struct snd_soc_dpcm *dpcm; 2541 int ret = 0; 2542 2543 for_each_dpcm_be(fe, stream, dpcm) { 2544 2545 struct snd_soc_pcm_runtime *be = dpcm->be; 2546 struct snd_pcm_substream *be_substream = 2547 snd_soc_dpcm_get_substream(be, stream); 2548 2549 /* is this op for this BE ? */ 2550 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2551 continue; 2552 2553 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2554 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2555 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2556 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2557 continue; 2558 2559 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2560 be->dai_link->name); 2561 2562 ret = soc_pcm_prepare(be_substream); 2563 if (ret < 0) { 2564 dev_err(be->dev, "ASoC: backend prepare failed %d\n", 2565 ret); 2566 break; 2567 } 2568 2569 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2570 } 2571 return ret; 2572 } 2573 2574 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2575 { 2576 struct snd_soc_pcm_runtime *fe = substream->private_data; 2577 int stream = substream->stream, ret = 0; 2578 2579 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2580 2581 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2582 2583 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2584 2585 /* there is no point preparing this FE if there are no BEs */ 2586 if (list_empty(&fe->dpcm[stream].be_clients)) { 2587 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2588 fe->dai_link->name); 2589 ret = -EINVAL; 2590 goto out; 2591 } 2592 2593 ret = dpcm_be_dai_prepare(fe, stream); 2594 if (ret < 0) 2595 goto out; 2596 2597 /* call prepare on the frontend */ 2598 ret = soc_pcm_prepare(substream); 2599 if (ret < 0) { 2600 dev_err(fe->dev,"ASoC: prepare FE %s failed\n", 2601 fe->dai_link->name); 2602 goto out; 2603 } 2604 2605 /* run the stream event for each BE */ 2606 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 2607 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2608 2609 out: 2610 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2611 mutex_unlock(&fe->card->mutex); 2612 2613 return ret; 2614 } 2615 2616 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2617 { 2618 struct snd_pcm_substream *substream = 2619 snd_soc_dpcm_get_substream(fe, stream); 2620 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2621 int err; 2622 2623 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2624 stream ? "capture" : "playback", fe->dai_link->name); 2625 2626 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2627 /* call bespoke trigger - FE takes care of all BE triggers */ 2628 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2629 fe->dai_link->name); 2630 2631 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2632 if (err < 0) 2633 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2634 } else { 2635 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2636 fe->dai_link->name); 2637 2638 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2639 if (err < 0) 2640 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); 2641 } 2642 2643 err = dpcm_be_dai_hw_free(fe, stream); 2644 if (err < 0) 2645 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); 2646 2647 err = dpcm_be_dai_shutdown(fe, stream); 2648 if (err < 0) 2649 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); 2650 2651 /* run the stream event for each BE */ 2652 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2653 2654 return 0; 2655 } 2656 2657 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2658 { 2659 struct snd_pcm_substream *substream = 2660 snd_soc_dpcm_get_substream(fe, stream); 2661 struct snd_soc_dpcm *dpcm; 2662 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2663 int ret; 2664 unsigned long flags; 2665 2666 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2667 stream ? "capture" : "playback", fe->dai_link->name); 2668 2669 /* Only start the BE if the FE is ready */ 2670 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2671 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) 2672 return -EINVAL; 2673 2674 /* startup must always be called for new BEs */ 2675 ret = dpcm_be_dai_startup(fe, stream); 2676 if (ret < 0) 2677 goto disconnect; 2678 2679 /* keep going if FE state is > open */ 2680 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2681 return 0; 2682 2683 ret = dpcm_be_dai_hw_params(fe, stream); 2684 if (ret < 0) 2685 goto close; 2686 2687 /* keep going if FE state is > hw_params */ 2688 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2689 return 0; 2690 2691 2692 ret = dpcm_be_dai_prepare(fe, stream); 2693 if (ret < 0) 2694 goto hw_free; 2695 2696 /* run the stream event for each BE */ 2697 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2698 2699 /* keep going if FE state is > prepare */ 2700 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2701 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2702 return 0; 2703 2704 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2705 /* call trigger on the frontend - FE takes care of all BE triggers */ 2706 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2707 fe->dai_link->name); 2708 2709 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2710 if (ret < 0) { 2711 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); 2712 goto hw_free; 2713 } 2714 } else { 2715 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2716 fe->dai_link->name); 2717 2718 ret = dpcm_be_dai_trigger(fe, stream, 2719 SNDRV_PCM_TRIGGER_START); 2720 if (ret < 0) { 2721 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); 2722 goto hw_free; 2723 } 2724 } 2725 2726 return 0; 2727 2728 hw_free: 2729 dpcm_be_dai_hw_free(fe, stream); 2730 close: 2731 dpcm_be_dai_shutdown(fe, stream); 2732 disconnect: 2733 /* disconnect any non started BEs */ 2734 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2735 for_each_dpcm_be(fe, stream, dpcm) { 2736 struct snd_soc_pcm_runtime *be = dpcm->be; 2737 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2738 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2739 } 2740 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2741 2742 return ret; 2743 } 2744 2745 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2746 { 2747 struct snd_soc_dapm_widget_list *list; 2748 int stream; 2749 int count, paths; 2750 int ret; 2751 2752 if (fe->num_cpus > 1) { 2753 dev_err(fe->dev, 2754 "%s doesn't support Multi CPU yet\n", __func__); 2755 return -EINVAL; 2756 } 2757 2758 if (!fe->dai_link->dynamic) 2759 return 0; 2760 2761 /* only check active links */ 2762 if (!fe->cpu_dai->active) 2763 return 0; 2764 2765 /* DAPM sync will call this to update DSP paths */ 2766 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2767 new ? "new" : "old", fe->dai_link->name); 2768 2769 for_each_pcm_streams(stream) { 2770 2771 /* skip if FE doesn't have playback/capture capability */ 2772 if (!snd_soc_dai_stream_valid(fe->cpu_dai, stream) || 2773 !snd_soc_dai_stream_valid(fe->codec_dai, stream)) 2774 continue; 2775 2776 /* skip if FE isn't currently playing/capturing */ 2777 if (!fe->cpu_dai->stream_active[stream] || 2778 !fe->codec_dai->stream_active[stream]) 2779 continue; 2780 2781 paths = dpcm_path_get(fe, stream, &list); 2782 if (paths < 0) { 2783 dev_warn(fe->dev, "ASoC: %s no valid %s path\n", 2784 fe->dai_link->name, 2785 stream == SNDRV_PCM_STREAM_PLAYBACK ? 2786 "playback" : "capture"); 2787 return paths; 2788 } 2789 2790 /* update any playback/capture paths */ 2791 count = dpcm_process_paths(fe, stream, &list, new); 2792 if (count) { 2793 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2794 if (new) 2795 ret = dpcm_run_update_startup(fe, stream); 2796 else 2797 ret = dpcm_run_update_shutdown(fe, stream); 2798 if (ret < 0) 2799 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); 2800 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2801 2802 dpcm_clear_pending_state(fe, stream); 2803 dpcm_be_disconnect(fe, stream); 2804 } 2805 2806 dpcm_path_put(&list); 2807 } 2808 2809 return 0; 2810 } 2811 2812 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2813 * any DAI links. 2814 */ 2815 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2816 { 2817 struct snd_soc_pcm_runtime *fe; 2818 int ret = 0; 2819 2820 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2821 /* shutdown all old paths first */ 2822 for_each_card_rtds(card, fe) { 2823 ret = soc_dpcm_fe_runtime_update(fe, 0); 2824 if (ret) 2825 goto out; 2826 } 2827 2828 /* bring new paths up */ 2829 for_each_card_rtds(card, fe) { 2830 ret = soc_dpcm_fe_runtime_update(fe, 1); 2831 if (ret) 2832 goto out; 2833 } 2834 2835 out: 2836 mutex_unlock(&card->mutex); 2837 return ret; 2838 } 2839 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2840 2841 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2842 { 2843 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2844 struct snd_soc_dpcm *dpcm; 2845 int stream = fe_substream->stream; 2846 2847 /* mark FE's links ready to prune */ 2848 for_each_dpcm_be(fe, stream, dpcm) 2849 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2850 2851 dpcm_be_disconnect(fe, stream); 2852 2853 fe->dpcm[stream].runtime = NULL; 2854 } 2855 2856 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2857 { 2858 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2859 int ret; 2860 2861 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2862 ret = dpcm_fe_dai_shutdown(fe_substream); 2863 2864 dpcm_fe_dai_cleanup(fe_substream); 2865 2866 mutex_unlock(&fe->card->mutex); 2867 return ret; 2868 } 2869 2870 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2871 { 2872 struct snd_soc_pcm_runtime *fe = fe_substream->private_data; 2873 struct snd_soc_dapm_widget_list *list; 2874 int ret; 2875 int stream = fe_substream->stream; 2876 2877 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2878 fe->dpcm[stream].runtime = fe_substream->runtime; 2879 2880 ret = dpcm_path_get(fe, stream, &list); 2881 if (ret < 0) { 2882 goto open_end; 2883 } else if (ret == 0) { 2884 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 2885 fe->dai_link->name, stream ? "capture" : "playback"); 2886 } 2887 2888 /* calculate valid and active FE <-> BE dpcms */ 2889 dpcm_process_paths(fe, stream, &list, 1); 2890 2891 ret = dpcm_fe_dai_startup(fe_substream); 2892 if (ret < 0) 2893 dpcm_fe_dai_cleanup(fe_substream); 2894 2895 dpcm_clear_pending_state(fe, stream); 2896 dpcm_path_put(&list); 2897 open_end: 2898 mutex_unlock(&fe->card->mutex); 2899 return ret; 2900 } 2901 2902 /* create a new pcm */ 2903 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2904 { 2905 struct snd_soc_dai *codec_dai; 2906 struct snd_soc_dai *cpu_dai; 2907 struct snd_soc_component *component; 2908 struct snd_pcm *pcm; 2909 char new_name[64]; 2910 int ret = 0, playback = 0, capture = 0; 2911 int i; 2912 2913 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2914 playback = rtd->dai_link->dpcm_playback; 2915 capture = rtd->dai_link->dpcm_capture; 2916 } else { 2917 /* Adapt stream for codec2codec links */ 2918 int cpu_capture = rtd->dai_link->params ? 2919 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2920 int cpu_playback = rtd->dai_link->params ? 2921 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2922 2923 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2924 if (rtd->num_cpus == 1) { 2925 cpu_dai = rtd->cpu_dais[0]; 2926 } else if (rtd->num_cpus == rtd->num_codecs) { 2927 cpu_dai = rtd->cpu_dais[i]; 2928 } else { 2929 dev_err(rtd->card->dev, 2930 "N cpus to M codecs link is not supported yet\n"); 2931 return -EINVAL; 2932 } 2933 2934 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2935 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2936 playback = 1; 2937 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2938 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2939 capture = 1; 2940 } 2941 } 2942 2943 if (rtd->dai_link->playback_only) { 2944 playback = 1; 2945 capture = 0; 2946 } 2947 2948 if (rtd->dai_link->capture_only) { 2949 playback = 0; 2950 capture = 1; 2951 } 2952 2953 /* create the PCM */ 2954 if (rtd->dai_link->params) { 2955 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2956 rtd->dai_link->stream_name); 2957 2958 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2959 playback, capture, &pcm); 2960 } else if (rtd->dai_link->no_pcm) { 2961 snprintf(new_name, sizeof(new_name), "(%s)", 2962 rtd->dai_link->stream_name); 2963 2964 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2965 playback, capture, &pcm); 2966 } else { 2967 if (rtd->dai_link->dynamic) 2968 snprintf(new_name, sizeof(new_name), "%s (*)", 2969 rtd->dai_link->stream_name); 2970 else 2971 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2972 rtd->dai_link->stream_name, 2973 (rtd->num_codecs > 1) ? 2974 "multicodec" : rtd->codec_dai->name, num); 2975 2976 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2977 capture, &pcm); 2978 } 2979 if (ret < 0) { 2980 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", 2981 rtd->dai_link->name); 2982 return ret; 2983 } 2984 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2985 2986 /* DAPM dai link stream work */ 2987 if (rtd->dai_link->params) 2988 rtd->close_delayed_work_func = codec2codec_close_delayed_work; 2989 else 2990 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2991 2992 pcm->nonatomic = rtd->dai_link->nonatomic; 2993 rtd->pcm = pcm; 2994 pcm->private_data = rtd; 2995 2996 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2997 if (playback) 2998 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2999 if (capture) 3000 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 3001 goto out; 3002 } 3003 3004 /* ASoC PCM operations */ 3005 if (rtd->dai_link->dynamic) { 3006 rtd->ops.open = dpcm_fe_dai_open; 3007 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 3008 rtd->ops.prepare = dpcm_fe_dai_prepare; 3009 rtd->ops.trigger = dpcm_fe_dai_trigger; 3010 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 3011 rtd->ops.close = dpcm_fe_dai_close; 3012 rtd->ops.pointer = soc_pcm_pointer; 3013 } else { 3014 rtd->ops.open = soc_pcm_open; 3015 rtd->ops.hw_params = soc_pcm_hw_params; 3016 rtd->ops.prepare = soc_pcm_prepare; 3017 rtd->ops.trigger = soc_pcm_trigger; 3018 rtd->ops.hw_free = soc_pcm_hw_free; 3019 rtd->ops.close = soc_pcm_close; 3020 rtd->ops.pointer = soc_pcm_pointer; 3021 } 3022 3023 for_each_rtd_components(rtd, i, component) { 3024 const struct snd_soc_component_driver *drv = component->driver; 3025 3026 if (drv->ioctl) 3027 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 3028 if (drv->sync_stop) 3029 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 3030 if (drv->copy_user) 3031 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 3032 if (drv->page) 3033 rtd->ops.page = snd_soc_pcm_component_page; 3034 if (drv->mmap) 3035 rtd->ops.mmap = snd_soc_pcm_component_mmap; 3036 } 3037 3038 if (playback) 3039 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 3040 3041 if (capture) 3042 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 3043 3044 ret = snd_soc_pcm_component_new(rtd); 3045 if (ret < 0) { 3046 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret); 3047 return ret; 3048 } 3049 3050 pcm->no_device_suspend = true; 3051 out: 3052 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", 3053 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name, 3054 (rtd->num_cpus > 1) ? "multicpu" : rtd->cpu_dai->name); 3055 return ret; 3056 } 3057 3058 /* is the current PCM operation for this FE ? */ 3059 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 3060 { 3061 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 3062 return 1; 3063 return 0; 3064 } 3065 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 3066 3067 /* is the current PCM operation for this BE ? */ 3068 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 3069 struct snd_soc_pcm_runtime *be, int stream) 3070 { 3071 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 3072 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 3073 be->dpcm[stream].runtime_update)) 3074 return 1; 3075 return 0; 3076 } 3077 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 3078 3079 /* get the substream for this BE */ 3080 struct snd_pcm_substream * 3081 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3082 { 3083 return be->pcm->streams[stream].substream; 3084 } 3085 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3086 3087 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 3088 struct snd_soc_pcm_runtime *be, 3089 int stream, 3090 const enum snd_soc_dpcm_state *states, 3091 int num_states) 3092 { 3093 struct snd_soc_dpcm *dpcm; 3094 int state; 3095 int ret = 1; 3096 unsigned long flags; 3097 int i; 3098 3099 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 3100 for_each_dpcm_fe(be, stream, dpcm) { 3101 3102 if (dpcm->fe == fe) 3103 continue; 3104 3105 state = dpcm->fe->dpcm[stream].state; 3106 for (i = 0; i < num_states; i++) { 3107 if (state == states[i]) { 3108 ret = 0; 3109 break; 3110 } 3111 } 3112 } 3113 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 3114 3115 /* it's safe to do this BE DAI */ 3116 return ret; 3117 } 3118 3119 /* 3120 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3121 * are not running, paused or suspended for the specified stream direction. 3122 */ 3123 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3124 struct snd_soc_pcm_runtime *be, int stream) 3125 { 3126 const enum snd_soc_dpcm_state state[] = { 3127 SND_SOC_DPCM_STATE_START, 3128 SND_SOC_DPCM_STATE_PAUSED, 3129 SND_SOC_DPCM_STATE_SUSPEND, 3130 }; 3131 3132 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3133 } 3134 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3135 3136 /* 3137 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3138 * running, paused or suspended for the specified stream direction. 3139 */ 3140 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3141 struct snd_soc_pcm_runtime *be, int stream) 3142 { 3143 const enum snd_soc_dpcm_state state[] = { 3144 SND_SOC_DPCM_STATE_START, 3145 SND_SOC_DPCM_STATE_PAUSED, 3146 SND_SOC_DPCM_STATE_SUSPEND, 3147 SND_SOC_DPCM_STATE_PREPARE, 3148 }; 3149 3150 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3151 } 3152 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3153