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/slab.h> 18#include <linux/workqueue.h> 19#include <linux/export.h> 20#include <linux/debugfs.h> 21#include <sound/core.h> 22#include <sound/pcm.h> 23#include <sound/pcm_params.h> 24#include <sound/soc.h> 25#include <sound/soc-dpcm.h> 26#include <sound/soc-link.h> 27#include <sound/initval.h> 28 29#define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret) 30static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd, 31 const char *func, int ret) 32{ 33 /* Positive, Zero values are not errors */ 34 if (ret >= 0) 35 return ret; 36 37 /* Negative values might be errors */ 38 switch (ret) { 39 case -EPROBE_DEFER: 40 case -ENOTSUPP: 41 case -EINVAL: 42 break; 43 default: 44 dev_err(rtd->dev, 45 "ASoC: error at %s on %s: %d\n", 46 func, rtd->dai_link->name, ret); 47 } 48 49 return ret; 50} 51 52static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd, 53 int stream) 54{ 55 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 56} 57 58#define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \ 59 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags) 60 61static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd, 62 int stream) 63{ 64 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 65} 66 67#define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \ 68 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags) 69 70#define DPCM_MAX_BE_USERS 8 71 72static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 73{ 74 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 75} 76static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 77{ 78 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 79} 80 81#ifdef CONFIG_DEBUG_FS 82static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 83{ 84 switch (state) { 85 case SND_SOC_DPCM_STATE_NEW: 86 return "new"; 87 case SND_SOC_DPCM_STATE_OPEN: 88 return "open"; 89 case SND_SOC_DPCM_STATE_HW_PARAMS: 90 return "hw_params"; 91 case SND_SOC_DPCM_STATE_PREPARE: 92 return "prepare"; 93 case SND_SOC_DPCM_STATE_START: 94 return "start"; 95 case SND_SOC_DPCM_STATE_STOP: 96 return "stop"; 97 case SND_SOC_DPCM_STATE_SUSPEND: 98 return "suspend"; 99 case SND_SOC_DPCM_STATE_PAUSED: 100 return "paused"; 101 case SND_SOC_DPCM_STATE_HW_FREE: 102 return "hw_free"; 103 case SND_SOC_DPCM_STATE_CLOSE: 104 return "close"; 105 } 106 107 return "unknown"; 108} 109 110static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 111 int stream, char *buf, size_t size) 112{ 113 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 114 struct snd_soc_dpcm *dpcm; 115 ssize_t offset = 0; 116 117 /* FE state */ 118 offset += scnprintf(buf + offset, size - offset, 119 "[%s - %s]\n", fe->dai_link->name, 120 stream ? "Capture" : "Playback"); 121 122 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 123 dpcm_state_string(fe->dpcm[stream].state)); 124 125 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 126 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 127 offset += scnprintf(buf + offset, size - offset, 128 "Hardware Params: " 129 "Format = %s, Channels = %d, Rate = %d\n", 130 snd_pcm_format_name(params_format(params)), 131 params_channels(params), 132 params_rate(params)); 133 134 /* BEs state */ 135 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 136 137 if (list_empty(&fe->dpcm[stream].be_clients)) { 138 offset += scnprintf(buf + offset, size - offset, 139 " No active DSP links\n"); 140 goto out; 141 } 142 143 for_each_dpcm_be(fe, stream, dpcm) { 144 struct snd_soc_pcm_runtime *be = dpcm->be; 145 params = &be->dpcm[stream].hw_params; 146 147 offset += scnprintf(buf + offset, size - offset, 148 "- %s\n", be->dai_link->name); 149 150 offset += scnprintf(buf + offset, size - offset, 151 " State: %s\n", 152 dpcm_state_string(be->dpcm[stream].state)); 153 154 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 155 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 156 offset += scnprintf(buf + offset, size - offset, 157 " Hardware Params: " 158 "Format = %s, Channels = %d, Rate = %d\n", 159 snd_pcm_format_name(params_format(params)), 160 params_channels(params), 161 params_rate(params)); 162 } 163out: 164 return offset; 165} 166 167static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 168 size_t count, loff_t *ppos) 169{ 170 struct snd_soc_pcm_runtime *fe = file->private_data; 171 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 172 int stream; 173 char *buf; 174 175 if (fe->dai_link->num_cpus > 1) { 176 dev_err(fe->dev, 177 "%s doesn't support Multi CPU yet\n", __func__); 178 return -EINVAL; 179 } 180 181 buf = kmalloc(out_count, GFP_KERNEL); 182 if (!buf) 183 return -ENOMEM; 184 185 snd_soc_dpcm_mutex_lock(fe); 186 for_each_pcm_streams(stream) 187 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 188 offset += dpcm_show_state(fe, stream, 189 buf + offset, 190 out_count - offset); 191 snd_soc_dpcm_mutex_unlock(fe); 192 193 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 194 195 kfree(buf); 196 return ret; 197} 198 199static const struct file_operations dpcm_state_fops = { 200 .open = simple_open, 201 .read = dpcm_state_read_file, 202 .llseek = default_llseek, 203}; 204 205void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 206{ 207 if (!rtd->dai_link->dynamic) 208 return; 209 210 if (!rtd->card->debugfs_card_root) 211 return; 212 213 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 214 rtd->card->debugfs_card_root); 215 216 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 217 rtd, &dpcm_state_fops); 218} 219 220static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 221{ 222 char *name; 223 224 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 225 stream ? "capture" : "playback"); 226 if (name) { 227 dpcm->debugfs_state = debugfs_create_dir( 228 name, dpcm->fe->debugfs_dpcm_root); 229 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 230 &dpcm->state); 231 kfree(name); 232 } 233} 234 235static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 236{ 237 debugfs_remove_recursive(dpcm->debugfs_state); 238} 239 240#else 241static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 242 int stream) 243{ 244} 245 246static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 247{ 248} 249#endif 250 251/* Set FE's runtime_update state; the state is protected via PCM stream lock 252 * for avoiding the race with trigger callback. 253 * If the state is unset and a trigger is pending while the previous operation, 254 * process the pending trigger action here. 255 */ 256static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 257static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 258 int stream, enum snd_soc_dpcm_update state) 259{ 260 struct snd_pcm_substream *substream = 261 snd_soc_dpcm_get_substream(fe, stream); 262 263 snd_soc_dpcm_stream_lock_irq(fe, stream); 264 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 265 dpcm_fe_dai_do_trigger(substream, 266 fe->dpcm[stream].trigger_pending - 1); 267 fe->dpcm[stream].trigger_pending = 0; 268 } 269 fe->dpcm[stream].runtime_update = state; 270 snd_soc_dpcm_stream_unlock_irq(fe, stream); 271} 272 273static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 274 int stream, enum snd_soc_dpcm_update state) 275{ 276 be->dpcm[stream].runtime_update = state; 277} 278 279/** 280 * snd_soc_runtime_action() - Increment/Decrement active count for 281 * PCM runtime components 282 * @rtd: ASoC PCM runtime that is activated 283 * @stream: Direction of the PCM stream 284 * @action: Activate stream if 1. Deactivate if -1. 285 * 286 * Increments/Decrements the active count for all the DAIs and components 287 * attached to a PCM runtime. 288 * Should typically be called when a stream is opened. 289 * 290 * Must be called with the rtd->card->pcm_mutex being held 291 */ 292void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 293 int stream, int action) 294{ 295 struct snd_soc_dai *dai; 296 int i; 297 298 snd_soc_dpcm_mutex_assert_held(rtd); 299 300 for_each_rtd_dais(rtd, i, dai) 301 snd_soc_dai_action(dai, stream, action); 302} 303EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 304 305/** 306 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 307 * @rtd: The ASoC PCM runtime that should be checked. 308 * 309 * This function checks whether the power down delay should be ignored for a 310 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 311 * been configured to ignore the delay, or if none of the components benefits 312 * from having the delay. 313 */ 314bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 315{ 316 struct snd_soc_component *component; 317 bool ignore = true; 318 int i; 319 320 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 321 return true; 322 323 for_each_rtd_components(rtd, i, component) 324 ignore &= !component->driver->use_pmdown_time; 325 326 return ignore; 327} 328 329/** 330 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 331 * @substream: the pcm substream 332 * @hw: the hardware parameters 333 * 334 * Sets the substream runtime hardware parameters. 335 */ 336int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 337 const struct snd_pcm_hardware *hw) 338{ 339 substream->runtime->hw = *hw; 340 341 return 0; 342} 343EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 344 345/* DPCM stream event, send event to FE and all active BEs. */ 346int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 347 int event) 348{ 349 struct snd_soc_dpcm *dpcm; 350 351 snd_soc_dpcm_mutex_assert_held(fe); 352 353 for_each_dpcm_be(fe, dir, dpcm) { 354 355 struct snd_soc_pcm_runtime *be = dpcm->be; 356 357 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 358 be->dai_link->name, event, dir); 359 360 if ((event == SND_SOC_DAPM_STREAM_STOP) && 361 (be->dpcm[dir].users >= 1)) 362 continue; 363 364 snd_soc_dapm_stream_event(be, dir, event); 365 } 366 367 snd_soc_dapm_stream_event(fe, dir, event); 368 369 return 0; 370} 371 372static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 373 struct snd_pcm_hw_params *params) 374{ 375 if (params) { 376 dai->rate = params_rate(params); 377 dai->channels = params_channels(params); 378 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 379 } else { 380 dai->rate = 0; 381 dai->channels = 0; 382 dai->sample_bits = 0; 383 } 384} 385 386static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 387 struct snd_soc_dai *soc_dai) 388{ 389 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 390 int ret; 391 392 if (!snd_soc_dai_active(soc_dai)) 393 return 0; 394 395#define __soc_pcm_apply_symmetry(name, NAME) \ 396 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 397 rtd->dai_link->symmetric_##name)) { \ 398 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 399 #name, soc_dai->name); \ 400 \ 401 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 402 SNDRV_PCM_HW_PARAM_##NAME,\ 403 soc_dai->name); \ 404 if (ret < 0) { \ 405 dev_err(soc_dai->dev, \ 406 "ASoC: Unable to apply %s constraint: %d\n",\ 407 #name, ret); \ 408 return ret; \ 409 } \ 410 } 411 412 __soc_pcm_apply_symmetry(rate, RATE); 413 __soc_pcm_apply_symmetry(channels, CHANNELS); 414 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 415 416 return 0; 417} 418 419static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 420 struct snd_pcm_hw_params *params) 421{ 422 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 423 struct snd_soc_dai d; 424 struct snd_soc_dai *dai; 425 struct snd_soc_dai *cpu_dai; 426 unsigned int symmetry, i; 427 428 d.name = __func__; 429 soc_pcm_set_dai_params(&d, params); 430 431#define __soc_pcm_params_symmetry(xxx) \ 432 symmetry = rtd->dai_link->symmetric_##xxx; \ 433 for_each_rtd_dais(rtd, i, dai) \ 434 symmetry |= dai->driver->symmetric_##xxx; \ 435 \ 436 if (symmetry) \ 437 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 438 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 439 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 440 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 441 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 442 return -EINVAL; \ 443 } 444 445 /* reject unmatched parameters when applying symmetry */ 446 __soc_pcm_params_symmetry(rate); 447 __soc_pcm_params_symmetry(channels); 448 __soc_pcm_params_symmetry(sample_bits); 449 450 return 0; 451} 452 453static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 454{ 455 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 456 struct snd_soc_dai_link *link = rtd->dai_link; 457 struct snd_soc_dai *dai; 458 unsigned int symmetry, i; 459 460 symmetry = link->symmetric_rate || 461 link->symmetric_channels || 462 link->symmetric_sample_bits; 463 464 for_each_rtd_dais(rtd, i, dai) 465 symmetry = symmetry || 466 dai->driver->symmetric_rate || 467 dai->driver->symmetric_channels || 468 dai->driver->symmetric_sample_bits; 469 470 if (symmetry) 471 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 472} 473 474static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 475{ 476 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 477 int ret; 478 479 if (!bits) 480 return; 481 482 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 483 if (ret != 0) 484 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 485 bits, ret); 486} 487 488static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 489{ 490 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 491 struct snd_soc_dai *cpu_dai; 492 struct snd_soc_dai *codec_dai; 493 int stream = substream->stream; 494 int i; 495 unsigned int bits = 0, cpu_bits = 0; 496 497 for_each_rtd_codec_dais(rtd, i, codec_dai) { 498 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 499 500 if (pcm_codec->sig_bits == 0) { 501 bits = 0; 502 break; 503 } 504 bits = max(pcm_codec->sig_bits, bits); 505 } 506 507 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 508 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 509 510 if (pcm_cpu->sig_bits == 0) { 511 cpu_bits = 0; 512 break; 513 } 514 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 515 } 516 517 soc_pcm_set_msb(substream, bits); 518 soc_pcm_set_msb(substream, cpu_bits); 519} 520 521static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 522{ 523 hw->rates = UINT_MAX; 524 hw->rate_min = 0; 525 hw->rate_max = UINT_MAX; 526 hw->channels_min = 0; 527 hw->channels_max = UINT_MAX; 528 hw->formats = ULLONG_MAX; 529} 530 531static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 532 struct snd_soc_pcm_stream *p) 533{ 534 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 535 536 /* setup hw->rate_min/max via hw->rates first */ 537 snd_pcm_hw_limit_rates(hw); 538 539 /* update hw->rate_min/max by snd_soc_pcm_stream */ 540 hw->rate_min = max(hw->rate_min, p->rate_min); 541 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 542} 543 544static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 545 struct snd_soc_pcm_stream *p) 546{ 547 hw->channels_min = max(hw->channels_min, p->channels_min); 548 hw->channels_max = min(hw->channels_max, p->channels_max); 549} 550 551static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 552 struct snd_soc_pcm_stream *p) 553{ 554 hw->formats &= p->formats; 555} 556 557/** 558 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 559 * @rtd: ASoC PCM runtime 560 * @hw: PCM hardware parameters (output) 561 * @stream: Direction of the PCM stream 562 * 563 * Calculates the subset of stream parameters supported by all DAIs 564 * associated with the PCM stream. 565 */ 566int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 567 struct snd_pcm_hardware *hw, int stream) 568{ 569 struct snd_soc_dai *codec_dai; 570 struct snd_soc_dai *cpu_dai; 571 struct snd_soc_pcm_stream *codec_stream; 572 struct snd_soc_pcm_stream *cpu_stream; 573 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 574 int i; 575 576 soc_pcm_hw_init(hw); 577 578 /* first calculate min/max only for CPUs in the DAI link */ 579 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 580 581 /* 582 * Skip CPUs which don't support the current stream type. 583 * Otherwise, since the rate, channel, and format values will 584 * zero in that case, we would have no usable settings left, 585 * causing the resulting setup to fail. 586 */ 587 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 588 continue; 589 590 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 591 592 soc_pcm_hw_update_chan(hw, cpu_stream); 593 soc_pcm_hw_update_rate(hw, cpu_stream); 594 soc_pcm_hw_update_format(hw, cpu_stream); 595 } 596 cpu_chan_min = hw->channels_min; 597 cpu_chan_max = hw->channels_max; 598 599 /* second calculate min/max only for CODECs in the DAI link */ 600 for_each_rtd_codec_dais(rtd, i, codec_dai) { 601 602 /* 603 * Skip CODECs which don't support the current stream type. 604 * Otherwise, since the rate, channel, and format values will 605 * zero in that case, we would have no usable settings left, 606 * causing the resulting setup to fail. 607 */ 608 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 609 continue; 610 611 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 612 613 soc_pcm_hw_update_chan(hw, codec_stream); 614 soc_pcm_hw_update_rate(hw, codec_stream); 615 soc_pcm_hw_update_format(hw, codec_stream); 616 } 617 618 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 619 if (!hw->channels_min) 620 return -EINVAL; 621 622 /* 623 * chan min/max cannot be enforced if there are multiple CODEC DAIs 624 * connected to CPU DAI(s), use CPU DAI's directly and let 625 * channel allocation be fixed up later 626 */ 627 if (rtd->dai_link->num_codecs > 1) { 628 hw->channels_min = cpu_chan_min; 629 hw->channels_max = cpu_chan_max; 630 } 631 632 return 0; 633} 634EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 635 636static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 637{ 638 struct snd_pcm_hardware *hw = &substream->runtime->hw; 639 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 640 u64 formats = hw->formats; 641 642 /* 643 * At least one CPU and one CODEC should match. Otherwise, we should 644 * have bailed out on a higher level, since there would be no CPU or 645 * CODEC to support the transfer direction in that case. 646 */ 647 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 648 649 if (formats) 650 hw->formats &= formats; 651} 652 653static int soc_pcm_components_open(struct snd_pcm_substream *substream) 654{ 655 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 656 struct snd_soc_component *component; 657 int i, ret = 0; 658 659 for_each_rtd_components(rtd, i, component) { 660 ret = snd_soc_component_module_get_when_open(component, substream); 661 if (ret < 0) 662 break; 663 664 ret = snd_soc_component_open(component, substream); 665 if (ret < 0) 666 break; 667 } 668 669 return ret; 670} 671 672static int soc_pcm_components_close(struct snd_pcm_substream *substream, 673 int rollback) 674{ 675 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 676 struct snd_soc_component *component; 677 int i, ret = 0; 678 679 for_each_rtd_components(rtd, i, component) { 680 int r = snd_soc_component_close(component, substream, rollback); 681 if (r < 0) 682 ret = r; /* use last ret */ 683 684 snd_soc_component_module_put_when_close(component, substream, rollback); 685 } 686 687 return ret; 688} 689 690static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 691 struct snd_pcm_substream *substream, int rollback) 692{ 693 struct snd_soc_component *component; 694 struct snd_soc_dai *dai; 695 int i; 696 697 snd_soc_dpcm_mutex_assert_held(rtd); 698 699 if (!rollback) { 700 snd_soc_runtime_deactivate(rtd, substream->stream); 701 702 /* Make sure DAI parameters cleared if the DAI becomes inactive */ 703 for_each_rtd_dais(rtd, i, dai) 704 if (snd_soc_dai_active(dai) == 0 && 705 (dai->rate || dai->channels || dai->sample_bits)) 706 soc_pcm_set_dai_params(dai, NULL); 707 } 708 709 for_each_rtd_dais(rtd, i, dai) 710 snd_soc_dai_shutdown(dai, substream, rollback); 711 712 snd_soc_link_shutdown(substream, rollback); 713 714 soc_pcm_components_close(substream, rollback); 715 716 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 717 718 for_each_rtd_components(rtd, i, component) 719 if (!snd_soc_component_active(component)) 720 pinctrl_pm_select_sleep_state(component->dev); 721 722 return 0; 723} 724 725/* 726 * Called by ALSA when a PCM substream is closed. Private data can be 727 * freed here. The cpu DAI, codec DAI, machine and components are also 728 * shutdown. 729 */ 730static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 731 struct snd_pcm_substream *substream) 732{ 733 return soc_pcm_clean(rtd, substream, 0); 734} 735 736/* PCM close ops for non-DPCM streams */ 737static int soc_pcm_close(struct snd_pcm_substream *substream) 738{ 739 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 740 741 snd_soc_dpcm_mutex_lock(rtd); 742 __soc_pcm_close(rtd, substream); 743 snd_soc_dpcm_mutex_unlock(rtd); 744 return 0; 745} 746 747static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 748{ 749 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 750 struct snd_pcm_hardware *hw = &substream->runtime->hw; 751 const char *name_cpu = soc_cpu_dai_name(rtd); 752 const char *name_codec = soc_codec_dai_name(rtd); 753 const char *err_msg; 754 struct device *dev = rtd->dev; 755 756 err_msg = "rates"; 757 if (!hw->rates) 758 goto config_err; 759 760 err_msg = "formats"; 761 if (!hw->formats) 762 goto config_err; 763 764 err_msg = "channels"; 765 if (!hw->channels_min || !hw->channels_max || 766 hw->channels_min > hw->channels_max) 767 goto config_err; 768 769 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 770 name_cpu); 771 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 772 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 773 hw->channels_max); 774 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 775 hw->rate_max); 776 777 return 0; 778 779config_err: 780 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 781 name_codec, name_cpu, err_msg); 782 return -EINVAL; 783} 784 785/* 786 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 787 * then initialized and any private data can be allocated. This also calls 788 * startup for the cpu DAI, component, machine and codec DAI. 789 */ 790static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 791 struct snd_pcm_substream *substream) 792{ 793 struct snd_soc_component *component; 794 struct snd_soc_dai *dai; 795 int i, ret = 0; 796 797 snd_soc_dpcm_mutex_assert_held(rtd); 798 799 for_each_rtd_components(rtd, i, component) 800 pinctrl_pm_select_default_state(component->dev); 801 802 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 803 if (ret < 0) 804 goto err; 805 806 ret = soc_pcm_components_open(substream); 807 if (ret < 0) 808 goto err; 809 810 ret = snd_soc_link_startup(substream); 811 if (ret < 0) 812 goto err; 813 814 /* startup the audio subsystem */ 815 for_each_rtd_dais(rtd, i, dai) { 816 ret = snd_soc_dai_startup(dai, substream); 817 if (ret < 0) 818 goto err; 819 } 820 821 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 822 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 823 goto dynamic; 824 825 /* Check that the codec and cpu DAIs are compatible */ 826 soc_pcm_init_runtime_hw(substream); 827 828 soc_pcm_update_symmetry(substream); 829 830 ret = soc_hw_sanity_check(substream); 831 if (ret < 0) 832 goto err; 833 834 soc_pcm_apply_msb(substream); 835 836 /* Symmetry only applies if we've already got an active stream. */ 837 for_each_rtd_dais(rtd, i, dai) { 838 ret = soc_pcm_apply_symmetry(substream, dai); 839 if (ret != 0) 840 goto err; 841 } 842dynamic: 843 snd_soc_runtime_activate(rtd, substream->stream); 844 ret = 0; 845err: 846 if (ret < 0) 847 soc_pcm_clean(rtd, substream, 1); 848 849 return soc_pcm_ret(rtd, ret); 850} 851 852/* PCM open ops for non-DPCM streams */ 853static int soc_pcm_open(struct snd_pcm_substream *substream) 854{ 855 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 856 int ret; 857 858 snd_soc_dpcm_mutex_lock(rtd); 859 ret = __soc_pcm_open(rtd, substream); 860 snd_soc_dpcm_mutex_unlock(rtd); 861 return ret; 862} 863 864/* 865 * Called by ALSA when the PCM substream is prepared, can set format, sample 866 * rate, etc. This function is non atomic and can be called multiple times, 867 * it can refer to the runtime info. 868 */ 869static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 870 struct snd_pcm_substream *substream) 871{ 872 struct snd_soc_dai *dai; 873 int i, ret = 0; 874 875 snd_soc_dpcm_mutex_assert_held(rtd); 876 877 ret = snd_soc_link_prepare(substream); 878 if (ret < 0) 879 goto out; 880 881 ret = snd_soc_pcm_component_prepare(substream); 882 if (ret < 0) 883 goto out; 884 885 ret = snd_soc_pcm_dai_prepare(substream); 886 if (ret < 0) 887 goto out; 888 889 /* cancel any delayed stream shutdown that is pending */ 890 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 891 rtd->pop_wait) { 892 rtd->pop_wait = 0; 893 cancel_delayed_work(&rtd->delayed_work); 894 } 895 896 snd_soc_dapm_stream_event(rtd, substream->stream, 897 SND_SOC_DAPM_STREAM_START); 898 899 for_each_rtd_dais(rtd, i, dai) { 900 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger) 901 snd_soc_dai_digital_mute(dai, 0, substream->stream); 902 } 903 904out: 905 return soc_pcm_ret(rtd, ret); 906} 907 908/* PCM prepare ops for non-DPCM streams */ 909static int soc_pcm_prepare(struct snd_pcm_substream *substream) 910{ 911 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 912 int ret; 913 914 snd_soc_dpcm_mutex_lock(rtd); 915 ret = __soc_pcm_prepare(rtd, substream); 916 snd_soc_dpcm_mutex_unlock(rtd); 917 return ret; 918} 919 920static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 921 unsigned int mask) 922{ 923 struct snd_interval *interval; 924 int channels = hweight_long(mask); 925 926 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 927 interval->min = channels; 928 interval->max = channels; 929} 930 931static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 932 struct snd_pcm_substream *substream, int rollback) 933{ 934 struct snd_soc_dai *dai; 935 int i; 936 937 snd_soc_dpcm_mutex_assert_held(rtd); 938 939 /* clear the corresponding DAIs parameters when going to be inactive */ 940 for_each_rtd_dais(rtd, i, dai) { 941 if (snd_soc_dai_active(dai) == 1) 942 soc_pcm_set_dai_params(dai, NULL); 943 944 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) { 945 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger) 946 snd_soc_dai_digital_mute(dai, 1, substream->stream); 947 } 948 } 949 950 /* run the stream event */ 951 snd_soc_dapm_stream_stop(rtd, substream->stream); 952 953 /* free any machine hw params */ 954 snd_soc_link_hw_free(substream, rollback); 955 956 /* free any component resources */ 957 snd_soc_pcm_component_hw_free(substream, rollback); 958 959 /* now free hw params for the DAIs */ 960 for_each_rtd_dais(rtd, i, dai) 961 if (snd_soc_dai_stream_valid(dai, substream->stream)) 962 snd_soc_dai_hw_free(dai, substream, rollback); 963 964 return 0; 965} 966 967/* 968 * Frees resources allocated by hw_params, can be called multiple times 969 */ 970static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 971 struct snd_pcm_substream *substream) 972{ 973 return soc_pcm_hw_clean(rtd, substream, 0); 974} 975 976/* hw_free PCM ops for non-DPCM streams */ 977static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 978{ 979 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 980 int ret; 981 982 snd_soc_dpcm_mutex_lock(rtd); 983 ret = __soc_pcm_hw_free(rtd, substream); 984 snd_soc_dpcm_mutex_unlock(rtd); 985 return ret; 986} 987 988/* 989 * Called by ALSA when the hardware params are set by application. This 990 * function can also be called multiple times and can allocate buffers 991 * (using snd_pcm_lib_* ). It's non-atomic. 992 */ 993static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, 994 struct snd_pcm_substream *substream, 995 struct snd_pcm_hw_params *params) 996{ 997 struct snd_soc_dai *cpu_dai; 998 struct snd_soc_dai *codec_dai; 999 struct snd_pcm_hw_params tmp_params; 1000 int i, ret = 0; 1001 1002 snd_soc_dpcm_mutex_assert_held(rtd); 1003 1004 ret = soc_pcm_params_symmetry(substream, params); 1005 if (ret) 1006 goto out; 1007 1008 ret = snd_soc_link_hw_params(substream, params); 1009 if (ret < 0) 1010 goto out; 1011 1012 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1013 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); 1014 1015 /* 1016 * Skip CODECs which don't support the current stream type, 1017 * the idea being that if a CODEC is not used for the currently 1018 * set up transfer direction, it should not need to be 1019 * configured, especially since the configuration used might 1020 * not even be supported by that CODEC. There may be cases 1021 * however where a CODEC needs to be set up although it is 1022 * actually not being used for the transfer, e.g. if a 1023 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1024 * for the DAI link including a playback-only CODEC. 1025 * If this becomes necessary, we will have to augment the 1026 * machine driver setup with information on how to act, so 1027 * we can do the right thing here. 1028 */ 1029 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1030 continue; 1031 1032 /* copy params for each codec */ 1033 tmp_params = *params; 1034 1035 /* fixup params based on TDM slot masks */ 1036 if (tdm_mask) 1037 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask); 1038 1039 ret = snd_soc_dai_hw_params(codec_dai, substream, 1040 &tmp_params); 1041 if(ret < 0) 1042 goto out; 1043 1044 soc_pcm_set_dai_params(codec_dai, &tmp_params); 1045 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai); 1046 } 1047 1048 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1049 unsigned int ch_mask = 0; 1050 int j; 1051 1052 /* 1053 * Skip CPUs which don't support the current stream 1054 * type. See soc_pcm_init_runtime_hw() for more details 1055 */ 1056 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1057 continue; 1058 1059 /* copy params for each cpu */ 1060 tmp_params = *params; 1061 1062 if (!rtd->dai_link->codec_ch_maps) 1063 goto hw_params; 1064 /* 1065 * construct cpu channel mask by combining ch_mask of each 1066 * codec which maps to the cpu. 1067 */ 1068 for_each_rtd_codec_dais(rtd, j, codec_dai) { 1069 if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i) 1070 ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask; 1071 } 1072 1073 /* fixup cpu channel number */ 1074 if (ch_mask) 1075 soc_pcm_codec_params_fixup(&tmp_params, ch_mask); 1076 1077hw_params: 1078 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params); 1079 if (ret < 0) 1080 goto out; 1081 1082 /* store the parameters for each DAI */ 1083 soc_pcm_set_dai_params(cpu_dai, &tmp_params); 1084 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai); 1085 } 1086 1087 ret = snd_soc_pcm_component_hw_params(substream, params); 1088out: 1089 if (ret < 0) 1090 soc_pcm_hw_clean(rtd, substream, 1); 1091 1092 return soc_pcm_ret(rtd, ret); 1093} 1094 1095/* hw_params PCM ops for non-DPCM streams */ 1096static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1097 struct snd_pcm_hw_params *params) 1098{ 1099 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1100 int ret; 1101 1102 snd_soc_dpcm_mutex_lock(rtd); 1103 ret = __soc_pcm_hw_params(rtd, substream, params); 1104 snd_soc_dpcm_mutex_unlock(rtd); 1105 return ret; 1106} 1107 1108#define TRIGGER_MAX 3 1109static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = { 1110 [SND_SOC_TRIGGER_ORDER_DEFAULT] = { 1111 snd_soc_link_trigger, 1112 snd_soc_pcm_component_trigger, 1113 snd_soc_pcm_dai_trigger, 1114 }, 1115 [SND_SOC_TRIGGER_ORDER_LDC] = { 1116 snd_soc_link_trigger, 1117 snd_soc_pcm_dai_trigger, 1118 snd_soc_pcm_component_trigger, 1119 }, 1120}; 1121 1122static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1123{ 1124 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1125 struct snd_soc_component *component; 1126 int ret = 0, r = 0, i; 1127 int rollback = 0; 1128 int start = 0, stop = 0; 1129 1130 /* 1131 * select START/STOP sequence 1132 */ 1133 for_each_rtd_components(rtd, i, component) { 1134 if (component->driver->trigger_start) 1135 start = component->driver->trigger_start; 1136 if (component->driver->trigger_stop) 1137 stop = component->driver->trigger_stop; 1138 } 1139 if (rtd->dai_link->trigger_start) 1140 start = rtd->dai_link->trigger_start; 1141 if (rtd->dai_link->trigger_stop) 1142 stop = rtd->dai_link->trigger_stop; 1143 1144 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX || 1145 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX) 1146 return -EINVAL; 1147 1148 /* 1149 * START 1150 */ 1151 switch (cmd) { 1152 case SNDRV_PCM_TRIGGER_START: 1153 case SNDRV_PCM_TRIGGER_RESUME: 1154 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1155 for (i = 0; i < TRIGGER_MAX; i++) { 1156 r = trigger[start][i](substream, cmd, 0); 1157 if (r < 0) 1158 break; 1159 } 1160 } 1161 1162 /* 1163 * Rollback if START failed 1164 * find correspond STOP command 1165 */ 1166 if (r < 0) { 1167 rollback = 1; 1168 ret = r; 1169 switch (cmd) { 1170 case SNDRV_PCM_TRIGGER_START: 1171 cmd = SNDRV_PCM_TRIGGER_STOP; 1172 break; 1173 case SNDRV_PCM_TRIGGER_RESUME: 1174 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1175 break; 1176 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1177 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1178 break; 1179 } 1180 } 1181 1182 /* 1183 * STOP 1184 */ 1185 switch (cmd) { 1186 case SNDRV_PCM_TRIGGER_STOP: 1187 case SNDRV_PCM_TRIGGER_SUSPEND: 1188 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1189 for (i = TRIGGER_MAX; i > 0; i--) { 1190 r = trigger[stop][i - 1](substream, cmd, rollback); 1191 if (r < 0) 1192 ret = r; 1193 } 1194 } 1195 1196 return ret; 1197} 1198 1199/* 1200 * soc level wrapper for pointer callback 1201 * If cpu_dai, codec_dai, component driver has the delay callback, then 1202 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1203 */ 1204static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1205{ 1206 struct snd_pcm_runtime *runtime = substream->runtime; 1207 snd_pcm_uframes_t offset = 0; 1208 snd_pcm_sframes_t codec_delay = 0; 1209 snd_pcm_sframes_t cpu_delay = 0; 1210 1211 offset = snd_soc_pcm_component_pointer(substream); 1212 1213 /* should be called *after* snd_soc_pcm_component_pointer() */ 1214 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1215 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1216 1217 runtime->delay = cpu_delay + codec_delay; 1218 1219 return offset; 1220} 1221 1222/* connect a FE and BE */ 1223static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1224 struct snd_soc_pcm_runtime *be, int stream) 1225{ 1226 struct snd_pcm_substream *fe_substream; 1227 struct snd_pcm_substream *be_substream; 1228 struct snd_soc_dpcm *dpcm; 1229 1230 snd_soc_dpcm_mutex_assert_held(fe); 1231 1232 /* only add new dpcms */ 1233 for_each_dpcm_be(fe, stream, dpcm) { 1234 if (dpcm->be == be && dpcm->fe == fe) 1235 return 0; 1236 } 1237 1238 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1239 be_substream = snd_soc_dpcm_get_substream(be, stream); 1240 1241 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { 1242 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", 1243 __func__); 1244 return -EINVAL; 1245 } 1246 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1247 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1248 be_substream->pcm->nonatomic = 1; 1249 } 1250 1251 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1252 if (!dpcm) 1253 return -ENOMEM; 1254 1255 dpcm->be = be; 1256 dpcm->fe = fe; 1257 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1258 snd_soc_dpcm_stream_lock_irq(fe, stream); 1259 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1260 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1261 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1262 1263 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1264 stream ? "capture" : "playback", fe->dai_link->name, 1265 stream ? "<-" : "->", be->dai_link->name); 1266 1267 dpcm_create_debugfs_state(dpcm, stream); 1268 1269 return 1; 1270} 1271 1272/* reparent a BE onto another FE */ 1273static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1274 struct snd_soc_pcm_runtime *be, int stream) 1275{ 1276 struct snd_soc_dpcm *dpcm; 1277 struct snd_pcm_substream *fe_substream, *be_substream; 1278 1279 /* reparent if BE is connected to other FEs */ 1280 if (!be->dpcm[stream].users) 1281 return; 1282 1283 be_substream = snd_soc_dpcm_get_substream(be, stream); 1284 if (!be_substream) 1285 return; 1286 1287 for_each_dpcm_fe(be, stream, dpcm) { 1288 if (dpcm->fe == fe) 1289 continue; 1290 1291 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1292 stream ? "capture" : "playback", 1293 dpcm->fe->dai_link->name, 1294 stream ? "<-" : "->", dpcm->be->dai_link->name); 1295 1296 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1297 be_substream->runtime = fe_substream->runtime; 1298 break; 1299 } 1300} 1301 1302/* disconnect a BE and FE */ 1303void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1304{ 1305 struct snd_soc_dpcm *dpcm, *d; 1306 LIST_HEAD(deleted_dpcms); 1307 1308 snd_soc_dpcm_mutex_assert_held(fe); 1309 1310 snd_soc_dpcm_stream_lock_irq(fe, stream); 1311 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1312 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1313 stream ? "capture" : "playback", 1314 dpcm->be->dai_link->name); 1315 1316 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1317 continue; 1318 1319 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1320 stream ? "capture" : "playback", fe->dai_link->name, 1321 stream ? "<-" : "->", dpcm->be->dai_link->name); 1322 1323 /* BEs still alive need new FE */ 1324 dpcm_be_reparent(fe, dpcm->be, stream); 1325 1326 list_del(&dpcm->list_be); 1327 list_move(&dpcm->list_fe, &deleted_dpcms); 1328 } 1329 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1330 1331 while (!list_empty(&deleted_dpcms)) { 1332 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1333 list_fe); 1334 list_del(&dpcm->list_fe); 1335 dpcm_remove_debugfs_state(dpcm); 1336 kfree(dpcm); 1337 } 1338} 1339 1340/* get BE for DAI widget and stream */ 1341static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1342 struct snd_soc_dapm_widget *widget, int stream) 1343{ 1344 struct snd_soc_pcm_runtime *be; 1345 struct snd_soc_dapm_widget *w; 1346 struct snd_soc_dai *dai; 1347 int i; 1348 1349 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1350 1351 for_each_card_rtds(card, be) { 1352 1353 if (!be->dai_link->no_pcm) 1354 continue; 1355 1356 if (!snd_soc_dpcm_get_substream(be, stream)) 1357 continue; 1358 1359 for_each_rtd_dais(be, i, dai) { 1360 w = snd_soc_dai_get_widget(dai, stream); 1361 1362 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1363 w ? w->name : "(not set)"); 1364 1365 if (w == widget) 1366 return be; 1367 } 1368 } 1369 1370 /* Widget provided is not a BE */ 1371 return NULL; 1372} 1373 1374int widget_in_list(struct snd_soc_dapm_widget_list *list, 1375 struct snd_soc_dapm_widget *widget) 1376{ 1377 struct snd_soc_dapm_widget *w; 1378 int i; 1379 1380 for_each_dapm_widgets(list, i, w) 1381 if (widget == w) 1382 return 1; 1383 1384 return 0; 1385} 1386EXPORT_SYMBOL_GPL(widget_in_list); 1387 1388bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1389{ 1390 struct snd_soc_card *card = widget->dapm->card; 1391 struct snd_soc_pcm_runtime *rtd; 1392 int stream; 1393 1394 /* adjust dir to stream */ 1395 if (dir == SND_SOC_DAPM_DIR_OUT) 1396 stream = SNDRV_PCM_STREAM_PLAYBACK; 1397 else 1398 stream = SNDRV_PCM_STREAM_CAPTURE; 1399 1400 rtd = dpcm_get_be(card, widget, stream); 1401 if (rtd) 1402 return true; 1403 1404 return false; 1405} 1406EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1407 1408int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1409 int stream, struct snd_soc_dapm_widget_list **list) 1410{ 1411 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1412 int paths; 1413 1414 if (fe->dai_link->num_cpus > 1) { 1415 dev_err(fe->dev, 1416 "%s doesn't support Multi CPU yet\n", __func__); 1417 return -EINVAL; 1418 } 1419 1420 /* get number of valid DAI paths and their widgets */ 1421 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1422 fe->card->component_chaining ? 1423 NULL : dpcm_end_walk_at_be); 1424 1425 if (paths > 0) 1426 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1427 stream ? "capture" : "playback"); 1428 else if (paths == 0) 1429 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1430 stream ? "capture" : "playback"); 1431 1432 return paths; 1433} 1434 1435void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1436{ 1437 snd_soc_dapm_dai_free_widgets(list); 1438} 1439 1440static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1441 struct snd_soc_dapm_widget_list *list) 1442{ 1443 struct snd_soc_dai *dai; 1444 unsigned int i; 1445 1446 /* is there a valid DAI widget for this BE */ 1447 for_each_rtd_dais(dpcm->be, i, dai) { 1448 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1449 1450 /* 1451 * The BE is pruned only if none of the dai 1452 * widgets are in the active list. 1453 */ 1454 if (widget && widget_in_list(list, widget)) 1455 return true; 1456 } 1457 1458 return false; 1459} 1460 1461static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1462 struct snd_soc_dapm_widget_list **list_) 1463{ 1464 struct snd_soc_dpcm *dpcm; 1465 int prune = 0; 1466 1467 /* Destroy any old FE <--> BE connections */ 1468 for_each_dpcm_be(fe, stream, dpcm) { 1469 if (dpcm_be_is_active(dpcm, stream, *list_)) 1470 continue; 1471 1472 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1473 stream ? "capture" : "playback", 1474 dpcm->be->dai_link->name, fe->dai_link->name); 1475 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1476 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1477 prune++; 1478 } 1479 1480 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1481 return prune; 1482} 1483 1484static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1485 struct snd_soc_dapm_widget_list **list_) 1486{ 1487 struct snd_soc_card *card = fe->card; 1488 struct snd_soc_dapm_widget_list *list = *list_; 1489 struct snd_soc_pcm_runtime *be; 1490 struct snd_soc_dapm_widget *widget; 1491 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1492 int i, new = 0, err; 1493 1494 /* don't connect if FE is not running */ 1495 if (!fe_substream->runtime && !fe->fe_compr) 1496 return new; 1497 1498 /* Create any new FE <--> BE connections */ 1499 for_each_dapm_widgets(list, i, widget) { 1500 1501 switch (widget->id) { 1502 case snd_soc_dapm_dai_in: 1503 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1504 continue; 1505 break; 1506 case snd_soc_dapm_dai_out: 1507 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1508 continue; 1509 break; 1510 default: 1511 continue; 1512 } 1513 1514 /* is there a valid BE rtd for this widget */ 1515 be = dpcm_get_be(card, widget, stream); 1516 if (!be) { 1517 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1518 widget->name); 1519 continue; 1520 } 1521 1522 /* 1523 * Filter for systems with 'component_chaining' enabled. 1524 * This helps to avoid unnecessary re-configuration of an 1525 * already active BE on such systems. 1526 */ 1527 if (fe->card->component_chaining && 1528 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1529 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1530 continue; 1531 1532 /* newly connected FE and BE */ 1533 err = dpcm_be_connect(fe, be, stream); 1534 if (err < 0) { 1535 dev_err(fe->dev, "ASoC: can't connect %s\n", 1536 widget->name); 1537 break; 1538 } else if (err == 0) /* already connected */ 1539 continue; 1540 1541 /* new */ 1542 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1543 new++; 1544 } 1545 1546 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1547 return new; 1548} 1549 1550/* 1551 * Find the corresponding BE DAIs that source or sink audio to this 1552 * FE substream. 1553 */ 1554int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1555 int stream, struct snd_soc_dapm_widget_list **list, int new) 1556{ 1557 if (new) 1558 return dpcm_add_paths(fe, stream, list); 1559 else 1560 return dpcm_prune_paths(fe, stream, list); 1561} 1562 1563void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1564{ 1565 struct snd_soc_dpcm *dpcm; 1566 1567 for_each_dpcm_be(fe, stream, dpcm) 1568 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1569} 1570 1571void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1572 int do_hw_free, struct snd_soc_dpcm *last) 1573{ 1574 struct snd_soc_dpcm *dpcm; 1575 1576 /* disable any enabled and non active backends */ 1577 for_each_dpcm_be(fe, stream, dpcm) { 1578 struct snd_soc_pcm_runtime *be = dpcm->be; 1579 struct snd_pcm_substream *be_substream = 1580 snd_soc_dpcm_get_substream(be, stream); 1581 1582 if (dpcm == last) 1583 return; 1584 1585 /* is this op for this BE ? */ 1586 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1587 continue; 1588 1589 if (be->dpcm[stream].users == 0) { 1590 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1591 stream ? "capture" : "playback", 1592 be->dpcm[stream].state); 1593 continue; 1594 } 1595 1596 if (--be->dpcm[stream].users != 0) 1597 continue; 1598 1599 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1600 if (!do_hw_free) 1601 continue; 1602 1603 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1604 __soc_pcm_hw_free(be, be_substream); 1605 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1606 } 1607 } 1608 1609 __soc_pcm_close(be, be_substream); 1610 be_substream->runtime = NULL; 1611 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1612 } 1613} 1614 1615int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1616{ 1617 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1618 struct snd_soc_pcm_runtime *be; 1619 struct snd_soc_dpcm *dpcm; 1620 int err, count = 0; 1621 1622 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1623 for_each_dpcm_be(fe, stream, dpcm) { 1624 struct snd_pcm_substream *be_substream; 1625 1626 be = dpcm->be; 1627 be_substream = snd_soc_dpcm_get_substream(be, stream); 1628 1629 if (!be_substream) { 1630 dev_err(be->dev, "ASoC: no backend %s stream\n", 1631 stream ? "capture" : "playback"); 1632 continue; 1633 } 1634 1635 /* is this op for this BE ? */ 1636 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1637 continue; 1638 1639 /* first time the dpcm is open ? */ 1640 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1641 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1642 stream ? "capture" : "playback", 1643 be->dpcm[stream].state); 1644 continue; 1645 } 1646 1647 if (be->dpcm[stream].users++ != 0) 1648 continue; 1649 1650 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1651 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1652 continue; 1653 1654 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1655 stream ? "capture" : "playback", be->dai_link->name); 1656 1657 be_substream->runtime = fe_substream->runtime; 1658 err = __soc_pcm_open(be, be_substream); 1659 if (err < 0) { 1660 be->dpcm[stream].users--; 1661 if (be->dpcm[stream].users < 0) 1662 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1663 stream ? "capture" : "playback", 1664 be->dpcm[stream].state); 1665 1666 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1667 goto unwind; 1668 } 1669 be->dpcm[stream].be_start = 0; 1670 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1671 count++; 1672 } 1673 1674 return count; 1675 1676unwind: 1677 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1678 1679 return soc_pcm_ret(fe, err); 1680} 1681 1682static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1683{ 1684 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1685 struct snd_pcm_runtime *runtime = substream->runtime; 1686 struct snd_pcm_hardware *hw = &runtime->hw; 1687 struct snd_soc_dai *dai; 1688 int stream = substream->stream; 1689 u64 formats = hw->formats; 1690 int i; 1691 1692 soc_pcm_hw_init(hw); 1693 1694 if (formats) 1695 hw->formats &= formats; 1696 1697 for_each_rtd_cpu_dais(fe, i, dai) { 1698 struct snd_soc_pcm_stream *cpu_stream; 1699 1700 /* 1701 * Skip CPUs which don't support the current stream 1702 * type. See soc_pcm_init_runtime_hw() for more details 1703 */ 1704 if (!snd_soc_dai_stream_valid(dai, stream)) 1705 continue; 1706 1707 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1708 1709 soc_pcm_hw_update_rate(hw, cpu_stream); 1710 soc_pcm_hw_update_chan(hw, cpu_stream); 1711 soc_pcm_hw_update_format(hw, cpu_stream); 1712 } 1713 1714} 1715 1716static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1717{ 1718 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1719 struct snd_pcm_runtime *runtime = substream->runtime; 1720 struct snd_pcm_hardware *hw = &runtime->hw; 1721 struct snd_soc_dpcm *dpcm; 1722 struct snd_soc_dai *dai; 1723 int stream = substream->stream; 1724 1725 if (!fe->dai_link->dpcm_merged_format) 1726 return; 1727 1728 /* 1729 * It returns merged BE codec format 1730 * if FE want to use it (= dpcm_merged_format) 1731 */ 1732 1733 for_each_dpcm_be(fe, stream, dpcm) { 1734 struct snd_soc_pcm_runtime *be = dpcm->be; 1735 struct snd_soc_pcm_stream *codec_stream; 1736 int i; 1737 1738 for_each_rtd_codec_dais(be, i, dai) { 1739 /* 1740 * Skip CODECs which don't support the current stream 1741 * type. See soc_pcm_init_runtime_hw() for more details 1742 */ 1743 if (!snd_soc_dai_stream_valid(dai, stream)) 1744 continue; 1745 1746 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1747 1748 soc_pcm_hw_update_format(hw, codec_stream); 1749 } 1750 } 1751} 1752 1753static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1754{ 1755 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1756 struct snd_pcm_runtime *runtime = substream->runtime; 1757 struct snd_pcm_hardware *hw = &runtime->hw; 1758 struct snd_soc_dpcm *dpcm; 1759 int stream = substream->stream; 1760 1761 if (!fe->dai_link->dpcm_merged_chan) 1762 return; 1763 1764 /* 1765 * It returns merged BE codec channel; 1766 * if FE want to use it (= dpcm_merged_chan) 1767 */ 1768 1769 for_each_dpcm_be(fe, stream, dpcm) { 1770 struct snd_soc_pcm_runtime *be = dpcm->be; 1771 struct snd_soc_pcm_stream *cpu_stream; 1772 struct snd_soc_dai *dai; 1773 int i; 1774 1775 for_each_rtd_cpu_dais(be, i, dai) { 1776 /* 1777 * Skip CPUs which don't support the current stream 1778 * type. See soc_pcm_init_runtime_hw() for more details 1779 */ 1780 if (!snd_soc_dai_stream_valid(dai, stream)) 1781 continue; 1782 1783 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1784 1785 soc_pcm_hw_update_chan(hw, cpu_stream); 1786 } 1787 1788 /* 1789 * chan min/max cannot be enforced if there are multiple CODEC 1790 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1791 */ 1792 if (be->dai_link->num_codecs == 1) { 1793 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1794 asoc_rtd_to_codec(be, 0), stream); 1795 1796 soc_pcm_hw_update_chan(hw, codec_stream); 1797 } 1798 } 1799} 1800 1801static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1802{ 1803 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1804 struct snd_pcm_runtime *runtime = substream->runtime; 1805 struct snd_pcm_hardware *hw = &runtime->hw; 1806 struct snd_soc_dpcm *dpcm; 1807 int stream = substream->stream; 1808 1809 if (!fe->dai_link->dpcm_merged_rate) 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 *pcm; 1820 struct snd_soc_dai *dai; 1821 int i; 1822 1823 for_each_rtd_dais(be, i, dai) { 1824 /* 1825 * Skip DAIs which don't support the current stream 1826 * type. See soc_pcm_init_runtime_hw() for more details 1827 */ 1828 if (!snd_soc_dai_stream_valid(dai, stream)) 1829 continue; 1830 1831 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1832 1833 soc_pcm_hw_update_rate(hw, pcm); 1834 } 1835 } 1836} 1837 1838static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1839 int stream) 1840{ 1841 struct snd_soc_dpcm *dpcm; 1842 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1843 struct snd_soc_dai *fe_cpu_dai; 1844 int err = 0; 1845 int i; 1846 1847 /* apply symmetry for FE */ 1848 soc_pcm_update_symmetry(fe_substream); 1849 1850 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1851 /* Symmetry only applies if we've got an active stream. */ 1852 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1853 if (err < 0) 1854 goto error; 1855 } 1856 1857 /* apply symmetry for BE */ 1858 for_each_dpcm_be(fe, stream, dpcm) { 1859 struct snd_soc_pcm_runtime *be = dpcm->be; 1860 struct snd_pcm_substream *be_substream = 1861 snd_soc_dpcm_get_substream(be, stream); 1862 struct snd_soc_pcm_runtime *rtd; 1863 struct snd_soc_dai *dai; 1864 1865 /* A backend may not have the requested substream */ 1866 if (!be_substream) 1867 continue; 1868 1869 rtd = asoc_substream_to_rtd(be_substream); 1870 if (rtd->dai_link->be_hw_params_fixup) 1871 continue; 1872 1873 soc_pcm_update_symmetry(be_substream); 1874 1875 /* Symmetry only applies if we've got an active stream. */ 1876 for_each_rtd_dais(rtd, i, dai) { 1877 err = soc_pcm_apply_symmetry(fe_substream, dai); 1878 if (err < 0) 1879 goto error; 1880 } 1881 } 1882error: 1883 return soc_pcm_ret(fe, err); 1884} 1885 1886static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1887{ 1888 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1889 int stream = fe_substream->stream, ret = 0; 1890 1891 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1892 1893 ret = dpcm_be_dai_startup(fe, stream); 1894 if (ret < 0) 1895 goto be_err; 1896 1897 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1898 1899 /* start the DAI frontend */ 1900 ret = __soc_pcm_open(fe, fe_substream); 1901 if (ret < 0) 1902 goto unwind; 1903 1904 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1905 1906 dpcm_runtime_setup_fe(fe_substream); 1907 1908 dpcm_runtime_setup_be_format(fe_substream); 1909 dpcm_runtime_setup_be_chan(fe_substream); 1910 dpcm_runtime_setup_be_rate(fe_substream); 1911 1912 ret = dpcm_apply_symmetry(fe_substream, stream); 1913 1914unwind: 1915 if (ret < 0) 1916 dpcm_be_dai_startup_unwind(fe, stream); 1917be_err: 1918 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1919 1920 return soc_pcm_ret(fe, ret); 1921} 1922 1923static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1924{ 1925 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1926 int stream = substream->stream; 1927 1928 snd_soc_dpcm_mutex_assert_held(fe); 1929 1930 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1931 1932 /* shutdown the BEs */ 1933 dpcm_be_dai_shutdown(fe, stream); 1934 1935 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1936 1937 /* now shutdown the frontend */ 1938 __soc_pcm_close(fe, substream); 1939 1940 /* run the stream stop event */ 1941 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1942 1943 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1944 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1945 return 0; 1946} 1947 1948void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1949{ 1950 struct snd_soc_dpcm *dpcm; 1951 1952 /* only hw_params backends that are either sinks or sources 1953 * to this frontend DAI */ 1954 for_each_dpcm_be(fe, stream, dpcm) { 1955 1956 struct snd_soc_pcm_runtime *be = dpcm->be; 1957 struct snd_pcm_substream *be_substream = 1958 snd_soc_dpcm_get_substream(be, stream); 1959 1960 /* is this op for this BE ? */ 1961 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1962 continue; 1963 1964 /* only free hw when no longer used - check all FEs */ 1965 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1966 continue; 1967 1968 /* do not free hw if this BE is used by other FE */ 1969 if (be->dpcm[stream].users > 1) 1970 continue; 1971 1972 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1973 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1974 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1975 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1976 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1977 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1978 continue; 1979 1980 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1981 be->dai_link->name); 1982 1983 __soc_pcm_hw_free(be, be_substream); 1984 1985 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1986 } 1987} 1988 1989static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1990{ 1991 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1992 int stream = substream->stream; 1993 1994 snd_soc_dpcm_mutex_lock(fe); 1995 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1996 1997 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1998 1999 /* call hw_free on the frontend */ 2000 soc_pcm_hw_clean(fe, substream, 0); 2001 2002 /* only hw_params backends that are either sinks or sources 2003 * to this frontend DAI */ 2004 dpcm_be_dai_hw_free(fe, stream); 2005 2006 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2007 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2008 2009 snd_soc_dpcm_mutex_unlock(fe); 2010 return 0; 2011} 2012 2013int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2014{ 2015 struct snd_soc_pcm_runtime *be; 2016 struct snd_pcm_substream *be_substream; 2017 struct snd_soc_dpcm *dpcm; 2018 int ret; 2019 2020 for_each_dpcm_be(fe, stream, dpcm) { 2021 struct snd_pcm_hw_params hw_params; 2022 2023 be = dpcm->be; 2024 be_substream = snd_soc_dpcm_get_substream(be, stream); 2025 2026 /* is this op for this BE ? */ 2027 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2028 continue; 2029 2030 /* copy params for each dpcm */ 2031 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 2032 sizeof(struct snd_pcm_hw_params)); 2033 2034 /* perform any hw_params fixups */ 2035 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 2036 if (ret < 0) 2037 goto unwind; 2038 2039 /* copy the fixed-up hw params for BE dai */ 2040 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2041 sizeof(struct snd_pcm_hw_params)); 2042 2043 /* only allow hw_params() if no connected FEs are running */ 2044 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2045 continue; 2046 2047 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2048 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2049 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2050 continue; 2051 2052 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2053 be->dai_link->name); 2054 2055 ret = __soc_pcm_hw_params(be, be_substream, &hw_params); 2056 if (ret < 0) 2057 goto unwind; 2058 2059 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2060 } 2061 return 0; 2062 2063unwind: 2064 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2065 __func__, be->dai_link->name, ret); 2066 2067 /* disable any enabled and non active backends */ 2068 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2069 be = dpcm->be; 2070 be_substream = snd_soc_dpcm_get_substream(be, stream); 2071 2072 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2073 continue; 2074 2075 /* only allow hw_free() if no connected FEs are running */ 2076 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2077 continue; 2078 2079 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2080 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2081 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2082 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2083 continue; 2084 2085 __soc_pcm_hw_free(be, be_substream); 2086 } 2087 2088 return ret; 2089} 2090 2091static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2092 struct snd_pcm_hw_params *params) 2093{ 2094 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2095 int ret, stream = substream->stream; 2096 2097 snd_soc_dpcm_mutex_lock(fe); 2098 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2099 2100 memcpy(&fe->dpcm[stream].hw_params, params, 2101 sizeof(struct snd_pcm_hw_params)); 2102 ret = dpcm_be_dai_hw_params(fe, stream); 2103 if (ret < 0) 2104 goto out; 2105 2106 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2107 fe->dai_link->name, params_rate(params), 2108 params_channels(params), params_format(params)); 2109 2110 /* call hw_params on the frontend */ 2111 ret = __soc_pcm_hw_params(fe, substream, params); 2112 if (ret < 0) 2113 dpcm_be_dai_hw_free(fe, stream); 2114 else 2115 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2116 2117out: 2118 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2119 snd_soc_dpcm_mutex_unlock(fe); 2120 2121 return soc_pcm_ret(fe, ret); 2122} 2123 2124int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2125 int cmd) 2126{ 2127 struct snd_soc_pcm_runtime *be; 2128 bool pause_stop_transition; 2129 struct snd_soc_dpcm *dpcm; 2130 unsigned long flags; 2131 int ret = 0; 2132 2133 for_each_dpcm_be(fe, stream, dpcm) { 2134 struct snd_pcm_substream *be_substream; 2135 2136 be = dpcm->be; 2137 be_substream = snd_soc_dpcm_get_substream(be, stream); 2138 2139 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); 2140 2141 /* is this op for this BE ? */ 2142 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2143 goto next; 2144 2145 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2146 be->dai_link->name, cmd); 2147 2148 switch (cmd) { 2149 case SNDRV_PCM_TRIGGER_START: 2150 if (!be->dpcm[stream].be_start && 2151 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2152 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2153 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2154 goto next; 2155 2156 be->dpcm[stream].be_start++; 2157 if (be->dpcm[stream].be_start != 1) 2158 goto next; 2159 2160 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2161 ret = soc_pcm_trigger(be_substream, 2162 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2163 else 2164 ret = soc_pcm_trigger(be_substream, 2165 SNDRV_PCM_TRIGGER_START); 2166 if (ret) { 2167 be->dpcm[stream].be_start--; 2168 goto next; 2169 } 2170 2171 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2172 break; 2173 case SNDRV_PCM_TRIGGER_RESUME: 2174 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2175 goto next; 2176 2177 be->dpcm[stream].be_start++; 2178 if (be->dpcm[stream].be_start != 1) 2179 goto next; 2180 2181 ret = soc_pcm_trigger(be_substream, cmd); 2182 if (ret) { 2183 be->dpcm[stream].be_start--; 2184 goto next; 2185 } 2186 2187 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2188 break; 2189 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2190 if (!be->dpcm[stream].be_start && 2191 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2192 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2193 goto next; 2194 2195 fe->dpcm[stream].fe_pause = false; 2196 be->dpcm[stream].be_pause--; 2197 2198 be->dpcm[stream].be_start++; 2199 if (be->dpcm[stream].be_start != 1) 2200 goto next; 2201 2202 ret = soc_pcm_trigger(be_substream, cmd); 2203 if (ret) { 2204 be->dpcm[stream].be_start--; 2205 goto next; 2206 } 2207 2208 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2209 break; 2210 case SNDRV_PCM_TRIGGER_STOP: 2211 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2212 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2213 goto next; 2214 2215 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2216 be->dpcm[stream].be_start--; 2217 2218 if (be->dpcm[stream].be_start != 0) 2219 goto next; 2220 2221 pause_stop_transition = false; 2222 if (fe->dpcm[stream].fe_pause) { 2223 pause_stop_transition = true; 2224 fe->dpcm[stream].fe_pause = false; 2225 be->dpcm[stream].be_pause--; 2226 } 2227 2228 if (be->dpcm[stream].be_pause != 0) 2229 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2230 else 2231 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2232 2233 if (ret) { 2234 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2235 be->dpcm[stream].be_start++; 2236 if (pause_stop_transition) { 2237 fe->dpcm[stream].fe_pause = true; 2238 be->dpcm[stream].be_pause++; 2239 } 2240 goto next; 2241 } 2242 2243 if (be->dpcm[stream].be_pause != 0) 2244 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2245 else 2246 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2247 2248 break; 2249 case SNDRV_PCM_TRIGGER_SUSPEND: 2250 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2251 goto next; 2252 2253 be->dpcm[stream].be_start--; 2254 if (be->dpcm[stream].be_start != 0) 2255 goto next; 2256 2257 ret = soc_pcm_trigger(be_substream, cmd); 2258 if (ret) { 2259 be->dpcm[stream].be_start++; 2260 goto next; 2261 } 2262 2263 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2264 break; 2265 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2266 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2267 goto next; 2268 2269 fe->dpcm[stream].fe_pause = true; 2270 be->dpcm[stream].be_pause++; 2271 2272 be->dpcm[stream].be_start--; 2273 if (be->dpcm[stream].be_start != 0) 2274 goto next; 2275 2276 ret = soc_pcm_trigger(be_substream, cmd); 2277 if (ret) { 2278 be->dpcm[stream].be_start++; 2279 goto next; 2280 } 2281 2282 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2283 break; 2284 } 2285next: 2286 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2287 if (ret) 2288 break; 2289 } 2290 return soc_pcm_ret(fe, ret); 2291} 2292EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2293 2294static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2295 int cmd, bool fe_first) 2296{ 2297 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2298 int ret; 2299 2300 /* call trigger on the frontend before the backend. */ 2301 if (fe_first) { 2302 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2303 fe->dai_link->name, cmd); 2304 2305 ret = soc_pcm_trigger(substream, cmd); 2306 if (ret < 0) 2307 return ret; 2308 2309 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2310 return ret; 2311 } 2312 2313 /* call trigger on the frontend after the backend. */ 2314 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2315 if (ret < 0) 2316 return ret; 2317 2318 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2319 fe->dai_link->name, cmd); 2320 2321 ret = soc_pcm_trigger(substream, cmd); 2322 2323 return ret; 2324} 2325 2326static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2327{ 2328 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2329 int stream = substream->stream; 2330 int ret = 0; 2331 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2332 2333 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2334 2335 switch (trigger) { 2336 case SND_SOC_DPCM_TRIGGER_PRE: 2337 switch (cmd) { 2338 case SNDRV_PCM_TRIGGER_START: 2339 case SNDRV_PCM_TRIGGER_RESUME: 2340 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2341 case SNDRV_PCM_TRIGGER_DRAIN: 2342 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2343 break; 2344 case SNDRV_PCM_TRIGGER_STOP: 2345 case SNDRV_PCM_TRIGGER_SUSPEND: 2346 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2347 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2348 break; 2349 default: 2350 ret = -EINVAL; 2351 break; 2352 } 2353 break; 2354 case SND_SOC_DPCM_TRIGGER_POST: 2355 switch (cmd) { 2356 case SNDRV_PCM_TRIGGER_START: 2357 case SNDRV_PCM_TRIGGER_RESUME: 2358 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2359 case SNDRV_PCM_TRIGGER_DRAIN: 2360 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2361 break; 2362 case SNDRV_PCM_TRIGGER_STOP: 2363 case SNDRV_PCM_TRIGGER_SUSPEND: 2364 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2365 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2366 break; 2367 default: 2368 ret = -EINVAL; 2369 break; 2370 } 2371 break; 2372 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2373 /* bespoke trigger() - handles both FE and BEs */ 2374 2375 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2376 fe->dai_link->name, cmd); 2377 2378 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2379 break; 2380 default: 2381 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2382 fe->dai_link->name); 2383 ret = -EINVAL; 2384 goto out; 2385 } 2386 2387 if (ret < 0) { 2388 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2389 cmd, ret); 2390 goto out; 2391 } 2392 2393 switch (cmd) { 2394 case SNDRV_PCM_TRIGGER_START: 2395 case SNDRV_PCM_TRIGGER_RESUME: 2396 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2397 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2398 break; 2399 case SNDRV_PCM_TRIGGER_STOP: 2400 case SNDRV_PCM_TRIGGER_SUSPEND: 2401 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2402 break; 2403 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2404 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2405 break; 2406 } 2407 2408out: 2409 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2410 return ret; 2411} 2412 2413static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2414{ 2415 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2416 int stream = substream->stream; 2417 2418 /* if FE's runtime_update is already set, we're in race; 2419 * process this trigger later at exit 2420 */ 2421 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2422 fe->dpcm[stream].trigger_pending = cmd + 1; 2423 return 0; /* delayed, assuming it's successful */ 2424 } 2425 2426 /* we're alone, let's trigger */ 2427 return dpcm_fe_dai_do_trigger(substream, cmd); 2428} 2429 2430int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2431{ 2432 struct snd_soc_dpcm *dpcm; 2433 int ret = 0; 2434 2435 for_each_dpcm_be(fe, stream, dpcm) { 2436 2437 struct snd_soc_pcm_runtime *be = dpcm->be; 2438 struct snd_pcm_substream *be_substream = 2439 snd_soc_dpcm_get_substream(be, stream); 2440 2441 /* is this op for this BE ? */ 2442 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2443 continue; 2444 2445 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream)) 2446 continue; 2447 2448 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2449 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2450 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2451 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2452 continue; 2453 2454 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2455 be->dai_link->name); 2456 2457 ret = __soc_pcm_prepare(be, be_substream); 2458 if (ret < 0) 2459 break; 2460 2461 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2462 } 2463 2464 return soc_pcm_ret(fe, ret); 2465} 2466 2467static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2468{ 2469 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2470 int stream = substream->stream, ret = 0; 2471 2472 snd_soc_dpcm_mutex_lock(fe); 2473 2474 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2475 2476 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2477 2478 /* there is no point preparing this FE if there are no BEs */ 2479 if (list_empty(&fe->dpcm[stream].be_clients)) { 2480 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */ 2481 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n", 2482 fe->dai_link->name); 2483 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2484 fe->dai_link->name); 2485 ret = -EINVAL; 2486 goto out; 2487 } 2488 2489 ret = dpcm_be_dai_prepare(fe, stream); 2490 if (ret < 0) 2491 goto out; 2492 2493 /* call prepare on the frontend */ 2494 ret = __soc_pcm_prepare(fe, substream); 2495 if (ret < 0) 2496 goto out; 2497 2498 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2499 2500out: 2501 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2502 snd_soc_dpcm_mutex_unlock(fe); 2503 2504 return soc_pcm_ret(fe, ret); 2505} 2506 2507static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2508{ 2509 struct snd_pcm_substream *substream = 2510 snd_soc_dpcm_get_substream(fe, stream); 2511 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2512 int err; 2513 2514 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2515 stream ? "capture" : "playback", fe->dai_link->name); 2516 2517 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2518 /* call bespoke trigger - FE takes care of all BE triggers */ 2519 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2520 fe->dai_link->name); 2521 2522 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2523 } else { 2524 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2525 fe->dai_link->name); 2526 2527 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2528 } 2529 2530 dpcm_be_dai_hw_free(fe, stream); 2531 2532 dpcm_be_dai_shutdown(fe, stream); 2533 2534 /* run the stream event for each BE */ 2535 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2536 2537 return soc_pcm_ret(fe, err); 2538} 2539 2540static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2541{ 2542 struct snd_pcm_substream *substream = 2543 snd_soc_dpcm_get_substream(fe, stream); 2544 struct snd_soc_dpcm *dpcm; 2545 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2546 int ret = 0; 2547 2548 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2549 stream ? "capture" : "playback", fe->dai_link->name); 2550 2551 /* Only start the BE if the FE is ready */ 2552 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2553 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2554 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2555 fe->dai_link->name, fe->dpcm[stream].state); 2556 ret = -EINVAL; 2557 goto disconnect; 2558 } 2559 2560 /* startup must always be called for new BEs */ 2561 ret = dpcm_be_dai_startup(fe, stream); 2562 if (ret < 0) 2563 goto disconnect; 2564 2565 /* keep going if FE state is > open */ 2566 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2567 return 0; 2568 2569 ret = dpcm_be_dai_hw_params(fe, stream); 2570 if (ret < 0) 2571 goto close; 2572 2573 /* keep going if FE state is > hw_params */ 2574 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2575 return 0; 2576 2577 ret = dpcm_be_dai_prepare(fe, stream); 2578 if (ret < 0) 2579 goto hw_free; 2580 2581 /* run the stream event for each BE */ 2582 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2583 2584 /* keep going if FE state is > prepare */ 2585 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2586 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2587 return 0; 2588 2589 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2590 /* call trigger on the frontend - FE takes care of all BE triggers */ 2591 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2592 fe->dai_link->name); 2593 2594 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2595 if (ret < 0) 2596 goto hw_free; 2597 } else { 2598 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2599 fe->dai_link->name); 2600 2601 ret = dpcm_be_dai_trigger(fe, stream, 2602 SNDRV_PCM_TRIGGER_START); 2603 if (ret < 0) 2604 goto hw_free; 2605 } 2606 2607 return 0; 2608 2609hw_free: 2610 dpcm_be_dai_hw_free(fe, stream); 2611close: 2612 dpcm_be_dai_shutdown(fe, stream); 2613disconnect: 2614 /* disconnect any pending BEs */ 2615 for_each_dpcm_be(fe, stream, dpcm) { 2616 struct snd_soc_pcm_runtime *be = dpcm->be; 2617 2618 /* is this op for this BE ? */ 2619 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2620 continue; 2621 2622 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2623 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2624 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2625 } 2626 2627 return soc_pcm_ret(fe, ret); 2628} 2629 2630static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2631{ 2632 struct snd_soc_dapm_widget_list *list; 2633 int stream; 2634 int count, paths; 2635 2636 if (!fe->dai_link->dynamic) 2637 return 0; 2638 2639 if (fe->dai_link->num_cpus > 1) { 2640 dev_err(fe->dev, 2641 "%s doesn't support Multi CPU yet\n", __func__); 2642 return -EINVAL; 2643 } 2644 2645 /* only check active links */ 2646 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2647 return 0; 2648 2649 /* DAPM sync will call this to update DSP paths */ 2650 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2651 new ? "new" : "old", fe->dai_link->name); 2652 2653 for_each_pcm_streams(stream) { 2654 2655 /* skip if FE doesn't have playback/capture capability */ 2656 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2657 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2658 continue; 2659 2660 /* skip if FE isn't currently playing/capturing */ 2661 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2662 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2663 continue; 2664 2665 paths = dpcm_path_get(fe, stream, &list); 2666 if (paths < 0) 2667 return paths; 2668 2669 /* update any playback/capture paths */ 2670 count = dpcm_process_paths(fe, stream, &list, new); 2671 if (count) { 2672 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2673 if (new) 2674 dpcm_run_update_startup(fe, stream); 2675 else 2676 dpcm_run_update_shutdown(fe, stream); 2677 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2678 2679 dpcm_clear_pending_state(fe, stream); 2680 dpcm_be_disconnect(fe, stream); 2681 } 2682 2683 dpcm_path_put(&list); 2684 } 2685 2686 return 0; 2687} 2688 2689/* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2690 * any DAI links. 2691 */ 2692int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2693{ 2694 struct snd_soc_pcm_runtime *fe; 2695 int ret = 0; 2696 2697 snd_soc_dpcm_mutex_lock(card); 2698 /* shutdown all old paths first */ 2699 for_each_card_rtds(card, fe) { 2700 ret = soc_dpcm_fe_runtime_update(fe, 0); 2701 if (ret) 2702 goto out; 2703 } 2704 2705 /* bring new paths up */ 2706 for_each_card_rtds(card, fe) { 2707 ret = soc_dpcm_fe_runtime_update(fe, 1); 2708 if (ret) 2709 goto out; 2710 } 2711 2712out: 2713 snd_soc_dpcm_mutex_unlock(card); 2714 return ret; 2715} 2716EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2717 2718static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2719{ 2720 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2721 struct snd_soc_dpcm *dpcm; 2722 int stream = fe_substream->stream; 2723 2724 snd_soc_dpcm_mutex_assert_held(fe); 2725 2726 /* mark FE's links ready to prune */ 2727 for_each_dpcm_be(fe, stream, dpcm) 2728 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2729 2730 dpcm_be_disconnect(fe, stream); 2731} 2732 2733static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2734{ 2735 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2736 int ret; 2737 2738 snd_soc_dpcm_mutex_lock(fe); 2739 ret = dpcm_fe_dai_shutdown(fe_substream); 2740 2741 dpcm_fe_dai_cleanup(fe_substream); 2742 2743 snd_soc_dpcm_mutex_unlock(fe); 2744 return ret; 2745} 2746 2747static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2748{ 2749 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2750 struct snd_soc_dapm_widget_list *list; 2751 int ret; 2752 int stream = fe_substream->stream; 2753 2754 snd_soc_dpcm_mutex_lock(fe); 2755 2756 ret = dpcm_path_get(fe, stream, &list); 2757 if (ret < 0) 2758 goto open_end; 2759 2760 /* calculate valid and active FE <-> BE dpcms */ 2761 dpcm_process_paths(fe, stream, &list, 1); 2762 2763 ret = dpcm_fe_dai_startup(fe_substream); 2764 if (ret < 0) 2765 dpcm_fe_dai_cleanup(fe_substream); 2766 2767 dpcm_clear_pending_state(fe, stream); 2768 dpcm_path_put(&list); 2769open_end: 2770 snd_soc_dpcm_mutex_unlock(fe); 2771 return ret; 2772} 2773 2774static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2775 int *playback, int *capture) 2776{ 2777 struct snd_soc_dai_link *dai_link = rtd->dai_link; 2778 struct snd_soc_dai *cpu_dai; 2779 int has_playback = 0; 2780 int has_capture = 0; 2781 int i; 2782 2783 if (dai_link->dynamic && dai_link->num_cpus > 1) { 2784 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2785 return -EINVAL; 2786 } 2787 2788 if (dai_link->dynamic || dai_link->no_pcm) { 2789 int stream; 2790 2791 if (dai_link->dpcm_playback) { 2792 stream = SNDRV_PCM_STREAM_PLAYBACK; 2793 2794 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2795 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2796 has_playback = 1; 2797 break; 2798 } 2799 } 2800 if (!has_playback) { 2801 dev_err(rtd->card->dev, 2802 "No CPU DAIs support playback for stream %s\n", 2803 dai_link->stream_name); 2804 return -EINVAL; 2805 } 2806 } 2807 if (dai_link->dpcm_capture) { 2808 stream = SNDRV_PCM_STREAM_CAPTURE; 2809 2810 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2811 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2812 has_capture = 1; 2813 break; 2814 } 2815 } 2816 2817 if (!has_capture) { 2818 dev_err(rtd->card->dev, 2819 "No CPU DAIs support capture for stream %s\n", 2820 dai_link->stream_name); 2821 return -EINVAL; 2822 } 2823 } 2824 } else { 2825 struct snd_soc_dai *codec_dai; 2826 2827 /* Adapt stream for codec2codec links */ 2828 int cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE); 2829 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK); 2830 2831 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2832 if (dai_link->num_cpus == 1) { 2833 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2834 } else if (dai_link->num_cpus == dai_link->num_codecs) { 2835 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2836 } else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) { 2837 int cpu_id; 2838 2839 if (!rtd->dai_link->codec_ch_maps) { 2840 dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n", 2841 __func__); 2842 return -EINVAL; 2843 } 2844 2845 cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id; 2846 cpu_dai = asoc_rtd_to_cpu(rtd, cpu_id); 2847 } else { 2848 dev_err(rtd->card->dev, 2849 "%s codec number %d < cpu number %d is not supported\n", 2850 __func__, rtd->dai_link->num_codecs, 2851 rtd->dai_link->num_cpus); 2852 return -EINVAL; 2853 } 2854 2855 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2856 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2857 has_playback = 1; 2858 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2859 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2860 has_capture = 1; 2861 } 2862 } 2863 2864 if (dai_link->playback_only) 2865 has_capture = 0; 2866 2867 if (dai_link->capture_only) 2868 has_playback = 0; 2869 2870 if (!has_playback && !has_capture) { 2871 dev_err(rtd->dev, "substream %s has no playback, no capture\n", 2872 dai_link->stream_name); 2873 2874 return -EINVAL; 2875 } 2876 2877 *playback = has_playback; 2878 *capture = has_capture; 2879 2880 return 0; 2881} 2882 2883static int soc_create_pcm(struct snd_pcm **pcm, 2884 struct snd_soc_pcm_runtime *rtd, 2885 int playback, int capture, int num) 2886{ 2887 char new_name[64]; 2888 int ret; 2889 2890 /* create the PCM */ 2891 if (rtd->dai_link->c2c_params) { 2892 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2893 rtd->dai_link->stream_name); 2894 2895 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2896 playback, capture, pcm); 2897 } else if (rtd->dai_link->no_pcm) { 2898 snprintf(new_name, sizeof(new_name), "(%s)", 2899 rtd->dai_link->stream_name); 2900 2901 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2902 playback, capture, pcm); 2903 } else { 2904 if (rtd->dai_link->dynamic) 2905 snprintf(new_name, sizeof(new_name), "%s (*)", 2906 rtd->dai_link->stream_name); 2907 else 2908 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2909 rtd->dai_link->stream_name, 2910 soc_codec_dai_name(rtd), num); 2911 2912 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2913 capture, pcm); 2914 } 2915 if (ret < 0) { 2916 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2917 new_name, rtd->dai_link->name, ret); 2918 return ret; 2919 } 2920 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2921 2922 return 0; 2923} 2924 2925/* create a new pcm */ 2926int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2927{ 2928 struct snd_soc_component *component; 2929 struct snd_pcm *pcm; 2930 int ret = 0, playback = 0, capture = 0; 2931 int i; 2932 2933 ret = soc_get_playback_capture(rtd, &playback, &capture); 2934 if (ret < 0) 2935 return ret; 2936 2937 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2938 if (ret < 0) 2939 return ret; 2940 2941 /* DAPM dai link stream work */ 2942 /* 2943 * Currently nothing to do for c2c links 2944 * Since c2c links are internal nodes in the DAPM graph and 2945 * don't interface with the outside world or application layer 2946 * we don't have to do any special handling on close. 2947 */ 2948 if (!rtd->dai_link->c2c_params) 2949 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2950 2951 rtd->pcm = pcm; 2952 pcm->nonatomic = rtd->dai_link->nonatomic; 2953 pcm->private_data = rtd; 2954 pcm->no_device_suspend = true; 2955 2956 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { 2957 if (playback) 2958 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2959 if (capture) 2960 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2961 goto out; 2962 } 2963 2964 /* ASoC PCM operations */ 2965 if (rtd->dai_link->dynamic) { 2966 rtd->ops.open = dpcm_fe_dai_open; 2967 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2968 rtd->ops.prepare = dpcm_fe_dai_prepare; 2969 rtd->ops.trigger = dpcm_fe_dai_trigger; 2970 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2971 rtd->ops.close = dpcm_fe_dai_close; 2972 rtd->ops.pointer = soc_pcm_pointer; 2973 } else { 2974 rtd->ops.open = soc_pcm_open; 2975 rtd->ops.hw_params = soc_pcm_hw_params; 2976 rtd->ops.prepare = soc_pcm_prepare; 2977 rtd->ops.trigger = soc_pcm_trigger; 2978 rtd->ops.hw_free = soc_pcm_hw_free; 2979 rtd->ops.close = soc_pcm_close; 2980 rtd->ops.pointer = soc_pcm_pointer; 2981 } 2982 2983 for_each_rtd_components(rtd, i, component) { 2984 const struct snd_soc_component_driver *drv = component->driver; 2985 2986 if (drv->ioctl) 2987 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2988 if (drv->sync_stop) 2989 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2990 if (drv->copy) 2991 rtd->ops.copy = snd_soc_pcm_component_copy; 2992 if (drv->page) 2993 rtd->ops.page = snd_soc_pcm_component_page; 2994 if (drv->mmap) 2995 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2996 if (drv->ack) 2997 rtd->ops.ack = snd_soc_pcm_component_ack; 2998 } 2999 3000 if (playback) 3001 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 3002 3003 if (capture) 3004 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 3005 3006 ret = snd_soc_pcm_component_new(rtd); 3007 if (ret < 0) 3008 return ret; 3009out: 3010 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 3011 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 3012 return ret; 3013} 3014 3015/* is the current PCM operation for this FE ? */ 3016int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 3017{ 3018 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 3019 return 1; 3020 return 0; 3021} 3022EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 3023 3024/* is the current PCM operation for this BE ? */ 3025int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 3026 struct snd_soc_pcm_runtime *be, int stream) 3027{ 3028 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 3029 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 3030 be->dpcm[stream].runtime_update)) 3031 return 1; 3032 return 0; 3033} 3034EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 3035 3036/* get the substream for this BE */ 3037struct snd_pcm_substream * 3038 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3039{ 3040 return be->pcm->streams[stream].substream; 3041} 3042EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3043 3044static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 3045 struct snd_soc_pcm_runtime *be, 3046 int stream, 3047 const enum snd_soc_dpcm_state *states, 3048 int num_states) 3049{ 3050 struct snd_soc_dpcm *dpcm; 3051 int state; 3052 int ret = 1; 3053 int i; 3054 3055 for_each_dpcm_fe(be, stream, dpcm) { 3056 3057 if (dpcm->fe == fe) 3058 continue; 3059 3060 state = dpcm->fe->dpcm[stream].state; 3061 for (i = 0; i < num_states; i++) { 3062 if (state == states[i]) { 3063 ret = 0; 3064 break; 3065 } 3066 } 3067 } 3068 3069 /* it's safe to do this BE DAI */ 3070 return ret; 3071} 3072 3073/* 3074 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3075 * are not running, paused or suspended for the specified stream direction. 3076 */ 3077int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3078 struct snd_soc_pcm_runtime *be, int stream) 3079{ 3080 const enum snd_soc_dpcm_state state[] = { 3081 SND_SOC_DPCM_STATE_START, 3082 SND_SOC_DPCM_STATE_PAUSED, 3083 SND_SOC_DPCM_STATE_SUSPEND, 3084 }; 3085 3086 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3087} 3088EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3089 3090/* 3091 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3092 * running, paused or suspended for the specified stream direction. 3093 */ 3094int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3095 struct snd_soc_pcm_runtime *be, int stream) 3096{ 3097 const enum snd_soc_dpcm_state state[] = { 3098 SND_SOC_DPCM_STATE_START, 3099 SND_SOC_DPCM_STATE_PAUSED, 3100 SND_SOC_DPCM_STATE_SUSPEND, 3101 SND_SOC_DPCM_STATE_PREPARE, 3102 }; 3103 3104 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3105} 3106EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3107 3108/* 3109 * We can only prepare a BE DAI if any of it's FE are not prepared, 3110 * running or paused for the specified stream direction. 3111 */ 3112int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe, 3113 struct snd_soc_pcm_runtime *be, int stream) 3114{ 3115 const enum snd_soc_dpcm_state state[] = { 3116 SND_SOC_DPCM_STATE_START, 3117 SND_SOC_DPCM_STATE_PAUSED, 3118 SND_SOC_DPCM_STATE_PREPARE, 3119 }; 3120 3121 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3122} 3123EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared); 3124