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) 30 static 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 break; 42 default: 43 dev_err(rtd->dev, 44 "ASoC: error at %s on %s: %d\n", 45 func, rtd->dai_link->name, ret); 46 } 47 48 return ret; 49 } 50 51 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd, 52 int stream) 53 { 54 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 55 } 56 57 #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \ 58 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags) 59 60 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd, 61 int stream) 62 { 63 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 64 } 65 66 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \ 67 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags) 68 69 #define DPCM_MAX_BE_USERS 8 70 71 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 72 { 73 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 74 } 75 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 76 { 77 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 78 } 79 80 #ifdef CONFIG_DEBUG_FS 81 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 82 { 83 switch (state) { 84 case SND_SOC_DPCM_STATE_NEW: 85 return "new"; 86 case SND_SOC_DPCM_STATE_OPEN: 87 return "open"; 88 case SND_SOC_DPCM_STATE_HW_PARAMS: 89 return "hw_params"; 90 case SND_SOC_DPCM_STATE_PREPARE: 91 return "prepare"; 92 case SND_SOC_DPCM_STATE_START: 93 return "start"; 94 case SND_SOC_DPCM_STATE_STOP: 95 return "stop"; 96 case SND_SOC_DPCM_STATE_SUSPEND: 97 return "suspend"; 98 case SND_SOC_DPCM_STATE_PAUSED: 99 return "paused"; 100 case SND_SOC_DPCM_STATE_HW_FREE: 101 return "hw_free"; 102 case SND_SOC_DPCM_STATE_CLOSE: 103 return "close"; 104 } 105 106 return "unknown"; 107 } 108 109 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 110 int stream, char *buf, size_t size) 111 { 112 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 113 struct snd_soc_dpcm *dpcm; 114 ssize_t offset = 0; 115 116 /* FE state */ 117 offset += scnprintf(buf + offset, size - offset, 118 "[%s - %s]\n", fe->dai_link->name, 119 stream ? "Capture" : "Playback"); 120 121 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 122 dpcm_state_string(fe->dpcm[stream].state)); 123 124 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 125 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 126 offset += scnprintf(buf + offset, size - offset, 127 "Hardware Params: " 128 "Format = %s, Channels = %d, Rate = %d\n", 129 snd_pcm_format_name(params_format(params)), 130 params_channels(params), 131 params_rate(params)); 132 133 /* BEs state */ 134 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 135 136 if (list_empty(&fe->dpcm[stream].be_clients)) { 137 offset += scnprintf(buf + offset, size - offset, 138 " No active DSP links\n"); 139 goto out; 140 } 141 142 for_each_dpcm_be(fe, stream, dpcm) { 143 struct snd_soc_pcm_runtime *be = dpcm->be; 144 params = &be->dpcm[stream].hw_params; 145 146 offset += scnprintf(buf + offset, size - offset, 147 "- %s\n", be->dai_link->name); 148 149 offset += scnprintf(buf + offset, size - offset, 150 " State: %s\n", 151 dpcm_state_string(be->dpcm[stream].state)); 152 153 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 154 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 155 offset += scnprintf(buf + offset, size - offset, 156 " Hardware Params: " 157 "Format = %s, Channels = %d, Rate = %d\n", 158 snd_pcm_format_name(params_format(params)), 159 params_channels(params), 160 params_rate(params)); 161 } 162 out: 163 return offset; 164 } 165 166 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 167 size_t count, loff_t *ppos) 168 { 169 struct snd_soc_pcm_runtime *fe = file->private_data; 170 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 171 int stream; 172 char *buf; 173 174 if (fe->dai_link->num_cpus > 1) { 175 dev_err(fe->dev, 176 "%s doesn't support Multi CPU yet\n", __func__); 177 return -EINVAL; 178 } 179 180 buf = kmalloc(out_count, GFP_KERNEL); 181 if (!buf) 182 return -ENOMEM; 183 184 snd_soc_dpcm_mutex_lock(fe); 185 for_each_pcm_streams(stream) 186 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 187 offset += dpcm_show_state(fe, stream, 188 buf + offset, 189 out_count - offset); 190 snd_soc_dpcm_mutex_unlock(fe); 191 192 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 193 194 kfree(buf); 195 return ret; 196 } 197 198 static const struct file_operations dpcm_state_fops = { 199 .open = simple_open, 200 .read = dpcm_state_read_file, 201 .llseek = default_llseek, 202 }; 203 204 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 205 { 206 if (!rtd->dai_link->dynamic) 207 return; 208 209 if (!rtd->card->debugfs_card_root) 210 return; 211 212 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 213 rtd->card->debugfs_card_root); 214 215 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 216 rtd, &dpcm_state_fops); 217 } 218 219 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 220 { 221 char *name; 222 223 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 224 stream ? "capture" : "playback"); 225 if (name) { 226 dpcm->debugfs_state = debugfs_create_dir( 227 name, dpcm->fe->debugfs_dpcm_root); 228 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 229 &dpcm->state); 230 kfree(name); 231 } 232 } 233 234 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 235 { 236 debugfs_remove_recursive(dpcm->debugfs_state); 237 } 238 239 #else 240 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 241 int stream) 242 { 243 } 244 245 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 246 { 247 } 248 #endif 249 250 /* Set FE's runtime_update state; the state is protected via PCM stream lock 251 * for avoiding the race with trigger callback. 252 * If the state is unset and a trigger is pending while the previous operation, 253 * process the pending trigger action here. 254 */ 255 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 256 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 257 int stream, enum snd_soc_dpcm_update state) 258 { 259 struct snd_pcm_substream *substream = 260 snd_soc_dpcm_get_substream(fe, stream); 261 262 snd_soc_dpcm_stream_lock_irq(fe, stream); 263 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 264 dpcm_fe_dai_do_trigger(substream, 265 fe->dpcm[stream].trigger_pending - 1); 266 fe->dpcm[stream].trigger_pending = 0; 267 } 268 fe->dpcm[stream].runtime_update = state; 269 snd_soc_dpcm_stream_unlock_irq(fe, stream); 270 } 271 272 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 273 int stream, enum snd_soc_dpcm_update state) 274 { 275 be->dpcm[stream].runtime_update = state; 276 } 277 278 /** 279 * snd_soc_runtime_action() - Increment/Decrement active count for 280 * PCM runtime components 281 * @rtd: ASoC PCM runtime that is activated 282 * @stream: Direction of the PCM stream 283 * @action: Activate stream if 1. Deactivate if -1. 284 * 285 * Increments/Decrements the active count for all the DAIs and components 286 * attached to a PCM runtime. 287 * Should typically be called when a stream is opened. 288 * 289 * Must be called with the rtd->card->pcm_mutex being held 290 */ 291 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 292 int stream, int action) 293 { 294 struct snd_soc_dai *dai; 295 int i; 296 297 snd_soc_dpcm_mutex_assert_held(rtd); 298 299 for_each_rtd_dais(rtd, i, dai) 300 snd_soc_dai_action(dai, stream, action); 301 } 302 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 303 304 /** 305 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 306 * @rtd: The ASoC PCM runtime that should be checked. 307 * 308 * This function checks whether the power down delay should be ignored for a 309 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 310 * been configured to ignore the delay, or if none of the components benefits 311 * from having the delay. 312 */ 313 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 314 { 315 struct snd_soc_component *component; 316 bool ignore = true; 317 int i; 318 319 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 320 return true; 321 322 for_each_rtd_components(rtd, i, component) 323 ignore &= !component->driver->use_pmdown_time; 324 325 return ignore; 326 } 327 328 /** 329 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 330 * @substream: the pcm substream 331 * @hw: the hardware parameters 332 * 333 * Sets the substream runtime hardware parameters. 334 */ 335 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 336 const struct snd_pcm_hardware *hw) 337 { 338 substream->runtime->hw = *hw; 339 340 return 0; 341 } 342 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 343 344 /* DPCM stream event, send event to FE and all active BEs. */ 345 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 346 int event) 347 { 348 struct snd_soc_dpcm *dpcm; 349 350 snd_soc_dpcm_mutex_assert_held(fe); 351 352 for_each_dpcm_be(fe, dir, dpcm) { 353 354 struct snd_soc_pcm_runtime *be = dpcm->be; 355 356 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 357 be->dai_link->name, event, dir); 358 359 if ((event == SND_SOC_DAPM_STREAM_STOP) && 360 (be->dpcm[dir].users >= 1)) 361 continue; 362 363 snd_soc_dapm_stream_event(be, dir, event); 364 } 365 366 snd_soc_dapm_stream_event(fe, dir, event); 367 368 return 0; 369 } 370 371 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 372 struct snd_pcm_hw_params *params) 373 { 374 if (params) { 375 dai->rate = params_rate(params); 376 dai->channels = params_channels(params); 377 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 378 } else { 379 dai->rate = 0; 380 dai->channels = 0; 381 dai->sample_bits = 0; 382 } 383 } 384 385 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 386 struct snd_soc_dai *soc_dai) 387 { 388 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 389 int ret; 390 391 if (!snd_soc_dai_active(soc_dai)) 392 return 0; 393 394 #define __soc_pcm_apply_symmetry(name, NAME) \ 395 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 396 rtd->dai_link->symmetric_##name)) { \ 397 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 398 #name, soc_dai->name); \ 399 \ 400 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 401 SNDRV_PCM_HW_PARAM_##NAME,\ 402 soc_dai->name); \ 403 if (ret < 0) { \ 404 dev_err(soc_dai->dev, \ 405 "ASoC: Unable to apply %s constraint: %d\n",\ 406 #name, ret); \ 407 return ret; \ 408 } \ 409 } 410 411 __soc_pcm_apply_symmetry(rate, RATE); 412 __soc_pcm_apply_symmetry(channels, CHANNELS); 413 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 414 415 return 0; 416 } 417 418 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 419 struct snd_pcm_hw_params *params) 420 { 421 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 422 struct snd_soc_dai d; 423 struct snd_soc_dai *dai; 424 struct snd_soc_dai *cpu_dai; 425 unsigned int symmetry, i; 426 427 d.name = __func__; 428 soc_pcm_set_dai_params(&d, params); 429 430 #define __soc_pcm_params_symmetry(xxx) \ 431 symmetry = rtd->dai_link->symmetric_##xxx; \ 432 for_each_rtd_dais(rtd, i, dai) \ 433 symmetry |= dai->driver->symmetric_##xxx; \ 434 \ 435 if (symmetry) \ 436 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 437 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 438 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 439 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 440 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 441 return -EINVAL; \ 442 } 443 444 /* reject unmatched parameters when applying symmetry */ 445 __soc_pcm_params_symmetry(rate); 446 __soc_pcm_params_symmetry(channels); 447 __soc_pcm_params_symmetry(sample_bits); 448 449 return 0; 450 } 451 452 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 453 { 454 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 455 struct snd_soc_dai_link *link = rtd->dai_link; 456 struct snd_soc_dai *dai; 457 unsigned int symmetry, i; 458 459 symmetry = link->symmetric_rate || 460 link->symmetric_channels || 461 link->symmetric_sample_bits; 462 463 for_each_rtd_dais(rtd, i, dai) 464 symmetry = symmetry || 465 dai->driver->symmetric_rate || 466 dai->driver->symmetric_channels || 467 dai->driver->symmetric_sample_bits; 468 469 if (symmetry) 470 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 471 } 472 473 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 474 { 475 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 476 int ret; 477 478 if (!bits) 479 return; 480 481 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 482 if (ret != 0) 483 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 484 bits, ret); 485 } 486 487 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 488 { 489 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 490 struct snd_soc_dai *cpu_dai; 491 struct snd_soc_dai *codec_dai; 492 int stream = substream->stream; 493 int i; 494 unsigned int bits = 0, cpu_bits = 0; 495 496 for_each_rtd_codec_dais(rtd, i, codec_dai) { 497 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 498 499 if (pcm_codec->sig_bits == 0) { 500 bits = 0; 501 break; 502 } 503 bits = max(pcm_codec->sig_bits, bits); 504 } 505 506 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 507 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 508 509 if (pcm_cpu->sig_bits == 0) { 510 cpu_bits = 0; 511 break; 512 } 513 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 514 } 515 516 soc_pcm_set_msb(substream, bits); 517 soc_pcm_set_msb(substream, cpu_bits); 518 } 519 520 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 521 { 522 hw->rates = UINT_MAX; 523 hw->rate_min = 0; 524 hw->rate_max = UINT_MAX; 525 hw->channels_min = 0; 526 hw->channels_max = UINT_MAX; 527 hw->formats = ULLONG_MAX; 528 } 529 530 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 531 struct snd_soc_pcm_stream *p) 532 { 533 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 534 535 /* setup hw->rate_min/max via hw->rates first */ 536 snd_pcm_hw_limit_rates(hw); 537 538 /* update hw->rate_min/max by snd_soc_pcm_stream */ 539 hw->rate_min = max(hw->rate_min, p->rate_min); 540 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 541 } 542 543 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 544 struct snd_soc_pcm_stream *p) 545 { 546 hw->channels_min = max(hw->channels_min, p->channels_min); 547 hw->channels_max = min(hw->channels_max, p->channels_max); 548 } 549 550 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 551 struct snd_soc_pcm_stream *p) 552 { 553 hw->formats &= p->formats; 554 } 555 556 /** 557 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 558 * @rtd: ASoC PCM runtime 559 * @hw: PCM hardware parameters (output) 560 * @stream: Direction of the PCM stream 561 * 562 * Calculates the subset of stream parameters supported by all DAIs 563 * associated with the PCM stream. 564 */ 565 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 566 struct snd_pcm_hardware *hw, int stream) 567 { 568 struct snd_soc_dai *codec_dai; 569 struct snd_soc_dai *cpu_dai; 570 struct snd_soc_pcm_stream *codec_stream; 571 struct snd_soc_pcm_stream *cpu_stream; 572 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 573 int i; 574 575 soc_pcm_hw_init(hw); 576 577 /* first calculate min/max only for CPUs in the DAI link */ 578 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 579 580 /* 581 * Skip CPUs which don't support the current stream type. 582 * Otherwise, since the rate, channel, and format values will 583 * zero in that case, we would have no usable settings left, 584 * causing the resulting setup to fail. 585 */ 586 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 587 continue; 588 589 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 590 591 soc_pcm_hw_update_chan(hw, cpu_stream); 592 soc_pcm_hw_update_rate(hw, cpu_stream); 593 soc_pcm_hw_update_format(hw, cpu_stream); 594 } 595 cpu_chan_min = hw->channels_min; 596 cpu_chan_max = hw->channels_max; 597 598 /* second calculate min/max only for CODECs in the DAI link */ 599 for_each_rtd_codec_dais(rtd, i, codec_dai) { 600 601 /* 602 * Skip CODECs which don't support the current stream type. 603 * Otherwise, since the rate, channel, and format values will 604 * zero in that case, we would have no usable settings left, 605 * causing the resulting setup to fail. 606 */ 607 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 608 continue; 609 610 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 611 612 soc_pcm_hw_update_chan(hw, codec_stream); 613 soc_pcm_hw_update_rate(hw, codec_stream); 614 soc_pcm_hw_update_format(hw, codec_stream); 615 } 616 617 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 618 if (!hw->channels_min) 619 return -EINVAL; 620 621 /* 622 * chan min/max cannot be enforced if there are multiple CODEC DAIs 623 * connected to CPU DAI(s), use CPU DAI's directly and let 624 * channel allocation be fixed up later 625 */ 626 if (rtd->dai_link->num_codecs > 1) { 627 hw->channels_min = cpu_chan_min; 628 hw->channels_max = cpu_chan_max; 629 } 630 631 return 0; 632 } 633 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 634 635 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 636 { 637 struct snd_pcm_hardware *hw = &substream->runtime->hw; 638 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 639 u64 formats = hw->formats; 640 641 /* 642 * At least one CPU and one CODEC should match. Otherwise, we should 643 * have bailed out on a higher level, since there would be no CPU or 644 * CODEC to support the transfer direction in that case. 645 */ 646 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 647 648 if (formats) 649 hw->formats &= formats; 650 } 651 652 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 653 { 654 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 655 struct snd_soc_component *component; 656 int i, ret = 0; 657 658 for_each_rtd_components(rtd, i, component) { 659 ret = snd_soc_component_module_get_when_open(component, substream); 660 if (ret < 0) 661 break; 662 663 ret = snd_soc_component_open(component, substream); 664 if (ret < 0) 665 break; 666 } 667 668 return ret; 669 } 670 671 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 672 int rollback) 673 { 674 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 675 struct snd_soc_component *component; 676 int i, ret = 0; 677 678 for_each_rtd_components(rtd, i, component) { 679 int r = snd_soc_component_close(component, substream, rollback); 680 if (r < 0) 681 ret = r; /* use last ret */ 682 683 snd_soc_component_module_put_when_close(component, substream, rollback); 684 } 685 686 return ret; 687 } 688 689 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 690 struct snd_pcm_substream *substream, int rollback) 691 { 692 struct snd_soc_component *component; 693 struct snd_soc_dai *dai; 694 int i; 695 696 snd_soc_dpcm_mutex_assert_held(rtd); 697 698 if (!rollback) { 699 snd_soc_runtime_deactivate(rtd, substream->stream); 700 /* clear the corresponding DAIs parameters when going to be inactive */ 701 for_each_rtd_dais(rtd, i, dai) { 702 if (snd_soc_dai_active(dai) == 0) 703 soc_pcm_set_dai_params(dai, NULL); 704 705 if (snd_soc_dai_stream_active(dai, substream->stream) == 0) 706 snd_soc_dai_digital_mute(dai, 1, substream->stream); 707 } 708 } 709 710 for_each_rtd_dais(rtd, i, dai) 711 snd_soc_dai_shutdown(dai, substream, rollback); 712 713 snd_soc_link_shutdown(substream, rollback); 714 715 soc_pcm_components_close(substream, rollback); 716 717 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 718 719 for_each_rtd_components(rtd, i, component) 720 if (!snd_soc_component_active(component)) 721 pinctrl_pm_select_sleep_state(component->dev); 722 723 return 0; 724 } 725 726 /* 727 * Called by ALSA when a PCM substream is closed. Private data can be 728 * freed here. The cpu DAI, codec DAI, machine and components are also 729 * shutdown. 730 */ 731 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 732 struct snd_pcm_substream *substream) 733 { 734 return soc_pcm_clean(rtd, substream, 0); 735 } 736 737 /* PCM close ops for non-DPCM streams */ 738 static int soc_pcm_close(struct snd_pcm_substream *substream) 739 { 740 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 741 742 snd_soc_dpcm_mutex_lock(rtd); 743 __soc_pcm_close(rtd, substream); 744 snd_soc_dpcm_mutex_unlock(rtd); 745 return 0; 746 } 747 748 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 749 { 750 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 751 struct snd_pcm_hardware *hw = &substream->runtime->hw; 752 const char *name_cpu = soc_cpu_dai_name(rtd); 753 const char *name_codec = soc_codec_dai_name(rtd); 754 const char *err_msg; 755 struct device *dev = rtd->dev; 756 757 err_msg = "rates"; 758 if (!hw->rates) 759 goto config_err; 760 761 err_msg = "formats"; 762 if (!hw->formats) 763 goto config_err; 764 765 err_msg = "channels"; 766 if (!hw->channels_min || !hw->channels_max || 767 hw->channels_min > hw->channels_max) 768 goto config_err; 769 770 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 771 name_cpu); 772 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 773 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 774 hw->channels_max); 775 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 776 hw->rate_max); 777 778 return 0; 779 780 config_err: 781 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 782 name_codec, name_cpu, err_msg); 783 return -EINVAL; 784 } 785 786 /* 787 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 788 * then initialized and any private data can be allocated. This also calls 789 * startup for the cpu DAI, component, machine and codec DAI. 790 */ 791 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 792 struct snd_pcm_substream *substream) 793 { 794 struct snd_soc_component *component; 795 struct snd_soc_dai *dai; 796 int i, ret = 0; 797 798 snd_soc_dpcm_mutex_assert_held(rtd); 799 800 for_each_rtd_components(rtd, i, component) 801 pinctrl_pm_select_default_state(component->dev); 802 803 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 804 if (ret < 0) 805 goto err; 806 807 ret = soc_pcm_components_open(substream); 808 if (ret < 0) 809 goto err; 810 811 ret = snd_soc_link_startup(substream); 812 if (ret < 0) 813 goto err; 814 815 /* startup the audio subsystem */ 816 for_each_rtd_dais(rtd, i, dai) { 817 ret = snd_soc_dai_startup(dai, substream); 818 if (ret < 0) 819 goto err; 820 } 821 822 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 823 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 824 goto dynamic; 825 826 /* Check that the codec and cpu DAIs are compatible */ 827 soc_pcm_init_runtime_hw(substream); 828 829 soc_pcm_update_symmetry(substream); 830 831 ret = soc_hw_sanity_check(substream); 832 if (ret < 0) 833 goto err; 834 835 soc_pcm_apply_msb(substream); 836 837 /* Symmetry only applies if we've already got an active stream. */ 838 for_each_rtd_dais(rtd, i, dai) { 839 ret = soc_pcm_apply_symmetry(substream, dai); 840 if (ret != 0) 841 goto err; 842 } 843 dynamic: 844 snd_soc_runtime_activate(rtd, substream->stream); 845 ret = 0; 846 err: 847 if (ret < 0) 848 soc_pcm_clean(rtd, substream, 1); 849 850 return soc_pcm_ret(rtd, ret); 851 } 852 853 /* PCM open ops for non-DPCM streams */ 854 static int soc_pcm_open(struct snd_pcm_substream *substream) 855 { 856 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 857 int ret; 858 859 snd_soc_dpcm_mutex_lock(rtd); 860 ret = __soc_pcm_open(rtd, substream); 861 snd_soc_dpcm_mutex_unlock(rtd); 862 return ret; 863 } 864 865 /* 866 * Called by ALSA when the PCM substream is prepared, can set format, sample 867 * rate, etc. This function is non atomic and can be called multiple times, 868 * it can refer to the runtime info. 869 */ 870 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 871 struct snd_pcm_substream *substream) 872 { 873 struct snd_soc_dai *dai; 874 int i, ret = 0; 875 876 snd_soc_dpcm_mutex_assert_held(rtd); 877 878 ret = snd_soc_link_prepare(substream); 879 if (ret < 0) 880 goto out; 881 882 ret = snd_soc_pcm_component_prepare(substream); 883 if (ret < 0) 884 goto out; 885 886 ret = snd_soc_pcm_dai_prepare(substream); 887 if (ret < 0) 888 goto out; 889 890 /* cancel any delayed stream shutdown that is pending */ 891 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 892 rtd->pop_wait) { 893 rtd->pop_wait = 0; 894 cancel_delayed_work(&rtd->delayed_work); 895 } 896 897 snd_soc_dapm_stream_event(rtd, substream->stream, 898 SND_SOC_DAPM_STREAM_START); 899 900 for_each_rtd_dais(rtd, i, dai) 901 snd_soc_dai_digital_mute(dai, 0, substream->stream); 902 903 out: 904 return soc_pcm_ret(rtd, ret); 905 } 906 907 /* PCM prepare ops for non-DPCM streams */ 908 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 909 { 910 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 911 int ret; 912 913 snd_soc_dpcm_mutex_lock(rtd); 914 ret = __soc_pcm_prepare(rtd, substream); 915 snd_soc_dpcm_mutex_unlock(rtd); 916 return ret; 917 } 918 919 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 920 unsigned int mask) 921 { 922 struct snd_interval *interval; 923 int channels = hweight_long(mask); 924 925 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 926 interval->min = channels; 927 interval->max = channels; 928 } 929 930 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 931 struct snd_pcm_substream *substream, int rollback) 932 { 933 struct snd_soc_dai *dai; 934 int i; 935 936 snd_soc_dpcm_mutex_assert_held(rtd); 937 938 /* run the stream event */ 939 snd_soc_dapm_stream_stop(rtd, substream->stream); 940 941 /* free any machine hw params */ 942 snd_soc_link_hw_free(substream, rollback); 943 944 /* free any component resources */ 945 snd_soc_pcm_component_hw_free(substream, rollback); 946 947 /* now free hw params for the DAIs */ 948 for_each_rtd_dais(rtd, i, dai) 949 if (snd_soc_dai_stream_valid(dai, substream->stream)) 950 snd_soc_dai_hw_free(dai, substream, rollback); 951 952 return 0; 953 } 954 955 /* 956 * Frees resources allocated by hw_params, can be called multiple times 957 */ 958 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 959 struct snd_pcm_substream *substream) 960 { 961 return soc_pcm_hw_clean(rtd, substream, 0); 962 } 963 964 /* hw_free PCM ops for non-DPCM streams */ 965 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 966 { 967 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 968 int ret; 969 970 snd_soc_dpcm_mutex_lock(rtd); 971 ret = __soc_pcm_hw_free(rtd, substream); 972 snd_soc_dpcm_mutex_unlock(rtd); 973 return ret; 974 } 975 976 /* 977 * Called by ALSA when the hardware params are set by application. This 978 * function can also be called multiple times and can allocate buffers 979 * (using snd_pcm_lib_* ). It's non-atomic. 980 */ 981 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, 982 struct snd_pcm_substream *substream, 983 struct snd_pcm_hw_params *params) 984 { 985 struct snd_soc_dai *cpu_dai; 986 struct snd_soc_dai *codec_dai; 987 int i, ret = 0; 988 989 snd_soc_dpcm_mutex_assert_held(rtd); 990 991 ret = soc_pcm_params_symmetry(substream, params); 992 if (ret) 993 goto out; 994 995 ret = snd_soc_link_hw_params(substream, params); 996 if (ret < 0) 997 goto out; 998 999 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1000 struct snd_pcm_hw_params codec_params; 1001 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); 1002 1003 /* 1004 * Skip CODECs which don't support the current stream type, 1005 * the idea being that if a CODEC is not used for the currently 1006 * set up transfer direction, it should not need to be 1007 * configured, especially since the configuration used might 1008 * not even be supported by that CODEC. There may be cases 1009 * however where a CODEC needs to be set up although it is 1010 * actually not being used for the transfer, e.g. if a 1011 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1012 * for the DAI link including a playback-only CODEC. 1013 * If this becomes necessary, we will have to augment the 1014 * machine driver setup with information on how to act, so 1015 * we can do the right thing here. 1016 */ 1017 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1018 continue; 1019 1020 /* copy params for each codec */ 1021 codec_params = *params; 1022 1023 /* fixup params based on TDM slot masks */ 1024 if (tdm_mask) 1025 soc_pcm_codec_params_fixup(&codec_params, tdm_mask); 1026 1027 ret = snd_soc_dai_hw_params(codec_dai, substream, 1028 &codec_params); 1029 if(ret < 0) 1030 goto out; 1031 1032 soc_pcm_set_dai_params(codec_dai, &codec_params); 1033 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 1034 } 1035 1036 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1037 struct snd_pcm_hw_params cpu_params; 1038 unsigned int ch_mask = 0; 1039 int j; 1040 1041 /* 1042 * Skip CPUs which don't support the current stream 1043 * type. See soc_pcm_init_runtime_hw() for more details 1044 */ 1045 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1046 continue; 1047 1048 /* copy params for each cpu */ 1049 cpu_params = *params; 1050 1051 if (!rtd->dai_link->codec_ch_maps) 1052 goto hw_params; 1053 /* 1054 * construct cpu channel mask by combining ch_mask of each 1055 * codec which maps to the cpu. 1056 */ 1057 for_each_rtd_codec_dais(rtd, j, codec_dai) { 1058 if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i) 1059 ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask; 1060 } 1061 1062 /* fixup cpu channel number */ 1063 if (ch_mask) 1064 soc_pcm_codec_params_fixup(&cpu_params, ch_mask); 1065 1066 hw_params: 1067 ret = snd_soc_dai_hw_params(cpu_dai, substream, &cpu_params); 1068 if (ret < 0) 1069 goto out; 1070 1071 /* store the parameters for each DAI */ 1072 soc_pcm_set_dai_params(cpu_dai, &cpu_params); 1073 snd_soc_dapm_update_dai(substream, &cpu_params, cpu_dai); 1074 } 1075 1076 ret = snd_soc_pcm_component_hw_params(substream, params); 1077 out: 1078 if (ret < 0) 1079 soc_pcm_hw_clean(rtd, substream, 1); 1080 1081 return soc_pcm_ret(rtd, ret); 1082 } 1083 1084 /* hw_params PCM ops for non-DPCM streams */ 1085 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1086 struct snd_pcm_hw_params *params) 1087 { 1088 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1089 int ret; 1090 1091 snd_soc_dpcm_mutex_lock(rtd); 1092 ret = __soc_pcm_hw_params(rtd, substream, params); 1093 snd_soc_dpcm_mutex_unlock(rtd); 1094 return ret; 1095 } 1096 1097 #define TRIGGER_MAX 3 1098 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = { 1099 [SND_SOC_TRIGGER_ORDER_DEFAULT] = { 1100 snd_soc_link_trigger, 1101 snd_soc_pcm_component_trigger, 1102 snd_soc_pcm_dai_trigger, 1103 }, 1104 [SND_SOC_TRIGGER_ORDER_LDC] = { 1105 snd_soc_link_trigger, 1106 snd_soc_pcm_dai_trigger, 1107 snd_soc_pcm_component_trigger, 1108 }, 1109 }; 1110 1111 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1112 { 1113 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1114 struct snd_soc_component *component; 1115 int ret = 0, r = 0, i; 1116 int rollback = 0; 1117 int start = 0, stop = 0; 1118 1119 /* 1120 * select START/STOP sequence 1121 */ 1122 for_each_rtd_components(rtd, i, component) { 1123 if (component->driver->trigger_start) 1124 start = component->driver->trigger_start; 1125 if (component->driver->trigger_stop) 1126 stop = component->driver->trigger_stop; 1127 } 1128 if (rtd->dai_link->trigger_start) 1129 start = rtd->dai_link->trigger_start; 1130 if (rtd->dai_link->trigger_stop) 1131 stop = rtd->dai_link->trigger_stop; 1132 1133 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX || 1134 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX) 1135 return -EINVAL; 1136 1137 /* 1138 * START 1139 */ 1140 switch (cmd) { 1141 case SNDRV_PCM_TRIGGER_START: 1142 case SNDRV_PCM_TRIGGER_RESUME: 1143 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1144 for (i = 0; i < TRIGGER_MAX; i++) { 1145 r = trigger[start][i](substream, cmd, 0); 1146 if (r < 0) 1147 break; 1148 } 1149 } 1150 1151 /* 1152 * Rollback if START failed 1153 * find correspond STOP command 1154 */ 1155 if (r < 0) { 1156 rollback = 1; 1157 ret = r; 1158 switch (cmd) { 1159 case SNDRV_PCM_TRIGGER_START: 1160 cmd = SNDRV_PCM_TRIGGER_STOP; 1161 break; 1162 case SNDRV_PCM_TRIGGER_RESUME: 1163 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1164 break; 1165 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1166 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1167 break; 1168 } 1169 } 1170 1171 /* 1172 * STOP 1173 */ 1174 switch (cmd) { 1175 case SNDRV_PCM_TRIGGER_STOP: 1176 case SNDRV_PCM_TRIGGER_SUSPEND: 1177 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1178 for (i = TRIGGER_MAX; i > 0; i--) { 1179 r = trigger[stop][i - 1](substream, cmd, rollback); 1180 if (r < 0) 1181 ret = r; 1182 } 1183 } 1184 1185 return ret; 1186 } 1187 1188 /* 1189 * soc level wrapper for pointer callback 1190 * If cpu_dai, codec_dai, component driver has the delay callback, then 1191 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1192 */ 1193 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1194 { 1195 struct snd_pcm_runtime *runtime = substream->runtime; 1196 snd_pcm_uframes_t offset = 0; 1197 snd_pcm_sframes_t codec_delay = 0; 1198 snd_pcm_sframes_t cpu_delay = 0; 1199 1200 offset = snd_soc_pcm_component_pointer(substream); 1201 1202 /* should be called *after* snd_soc_pcm_component_pointer() */ 1203 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1204 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1205 1206 runtime->delay = cpu_delay + codec_delay; 1207 1208 return offset; 1209 } 1210 1211 /* connect a FE and BE */ 1212 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1213 struct snd_soc_pcm_runtime *be, int stream) 1214 { 1215 struct snd_pcm_substream *fe_substream; 1216 struct snd_pcm_substream *be_substream; 1217 struct snd_soc_dpcm *dpcm; 1218 1219 snd_soc_dpcm_mutex_assert_held(fe); 1220 1221 /* only add new dpcms */ 1222 for_each_dpcm_be(fe, stream, dpcm) { 1223 if (dpcm->be == be && dpcm->fe == fe) 1224 return 0; 1225 } 1226 1227 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1228 be_substream = snd_soc_dpcm_get_substream(be, stream); 1229 1230 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { 1231 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", 1232 __func__); 1233 return -EINVAL; 1234 } 1235 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1236 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1237 be_substream->pcm->nonatomic = 1; 1238 } 1239 1240 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1241 if (!dpcm) 1242 return -ENOMEM; 1243 1244 dpcm->be = be; 1245 dpcm->fe = fe; 1246 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1247 snd_soc_dpcm_stream_lock_irq(fe, stream); 1248 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1249 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1250 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1251 1252 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1253 stream ? "capture" : "playback", fe->dai_link->name, 1254 stream ? "<-" : "->", be->dai_link->name); 1255 1256 dpcm_create_debugfs_state(dpcm, stream); 1257 1258 return 1; 1259 } 1260 1261 /* reparent a BE onto another FE */ 1262 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1263 struct snd_soc_pcm_runtime *be, int stream) 1264 { 1265 struct snd_soc_dpcm *dpcm; 1266 struct snd_pcm_substream *fe_substream, *be_substream; 1267 1268 /* reparent if BE is connected to other FEs */ 1269 if (!be->dpcm[stream].users) 1270 return; 1271 1272 be_substream = snd_soc_dpcm_get_substream(be, stream); 1273 if (!be_substream) 1274 return; 1275 1276 for_each_dpcm_fe(be, stream, dpcm) { 1277 if (dpcm->fe == fe) 1278 continue; 1279 1280 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1281 stream ? "capture" : "playback", 1282 dpcm->fe->dai_link->name, 1283 stream ? "<-" : "->", dpcm->be->dai_link->name); 1284 1285 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1286 be_substream->runtime = fe_substream->runtime; 1287 break; 1288 } 1289 } 1290 1291 /* disconnect a BE and FE */ 1292 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1293 { 1294 struct snd_soc_dpcm *dpcm, *d; 1295 LIST_HEAD(deleted_dpcms); 1296 1297 snd_soc_dpcm_mutex_assert_held(fe); 1298 1299 snd_soc_dpcm_stream_lock_irq(fe, stream); 1300 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1301 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1302 stream ? "capture" : "playback", 1303 dpcm->be->dai_link->name); 1304 1305 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1306 continue; 1307 1308 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1309 stream ? "capture" : "playback", fe->dai_link->name, 1310 stream ? "<-" : "->", dpcm->be->dai_link->name); 1311 1312 /* BEs still alive need new FE */ 1313 dpcm_be_reparent(fe, dpcm->be, stream); 1314 1315 list_del(&dpcm->list_be); 1316 list_move(&dpcm->list_fe, &deleted_dpcms); 1317 } 1318 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1319 1320 while (!list_empty(&deleted_dpcms)) { 1321 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1322 list_fe); 1323 list_del(&dpcm->list_fe); 1324 dpcm_remove_debugfs_state(dpcm); 1325 kfree(dpcm); 1326 } 1327 } 1328 1329 /* get BE for DAI widget and stream */ 1330 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1331 struct snd_soc_dapm_widget *widget, int stream) 1332 { 1333 struct snd_soc_pcm_runtime *be; 1334 struct snd_soc_dapm_widget *w; 1335 struct snd_soc_dai *dai; 1336 int i; 1337 1338 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1339 1340 for_each_card_rtds(card, be) { 1341 1342 if (!be->dai_link->no_pcm) 1343 continue; 1344 1345 if (!snd_soc_dpcm_get_substream(be, stream)) 1346 continue; 1347 1348 for_each_rtd_dais(be, i, dai) { 1349 w = snd_soc_dai_get_widget(dai, stream); 1350 1351 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1352 w ? w->name : "(not set)"); 1353 1354 if (w == widget) 1355 return be; 1356 } 1357 } 1358 1359 /* Widget provided is not a BE */ 1360 return NULL; 1361 } 1362 1363 int widget_in_list(struct snd_soc_dapm_widget_list *list, 1364 struct snd_soc_dapm_widget *widget) 1365 { 1366 struct snd_soc_dapm_widget *w; 1367 int i; 1368 1369 for_each_dapm_widgets(list, i, w) 1370 if (widget == w) 1371 return 1; 1372 1373 return 0; 1374 } 1375 EXPORT_SYMBOL_GPL(widget_in_list); 1376 1377 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1378 { 1379 struct snd_soc_card *card = widget->dapm->card; 1380 struct snd_soc_pcm_runtime *rtd; 1381 int stream; 1382 1383 /* adjust dir to stream */ 1384 if (dir == SND_SOC_DAPM_DIR_OUT) 1385 stream = SNDRV_PCM_STREAM_PLAYBACK; 1386 else 1387 stream = SNDRV_PCM_STREAM_CAPTURE; 1388 1389 rtd = dpcm_get_be(card, widget, stream); 1390 if (rtd) 1391 return true; 1392 1393 return false; 1394 } 1395 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1396 1397 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1398 int stream, struct snd_soc_dapm_widget_list **list) 1399 { 1400 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1401 int paths; 1402 1403 if (fe->dai_link->num_cpus > 1) { 1404 dev_err(fe->dev, 1405 "%s doesn't support Multi CPU yet\n", __func__); 1406 return -EINVAL; 1407 } 1408 1409 /* get number of valid DAI paths and their widgets */ 1410 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1411 fe->card->component_chaining ? 1412 NULL : dpcm_end_walk_at_be); 1413 1414 if (paths > 0) 1415 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1416 stream ? "capture" : "playback"); 1417 else if (paths == 0) 1418 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1419 stream ? "capture" : "playback"); 1420 1421 return paths; 1422 } 1423 1424 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1425 { 1426 snd_soc_dapm_dai_free_widgets(list); 1427 } 1428 1429 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1430 struct snd_soc_dapm_widget_list *list) 1431 { 1432 struct snd_soc_dai *dai; 1433 unsigned int i; 1434 1435 /* is there a valid DAI widget for this BE */ 1436 for_each_rtd_dais(dpcm->be, i, dai) { 1437 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1438 1439 /* 1440 * The BE is pruned only if none of the dai 1441 * widgets are in the active list. 1442 */ 1443 if (widget && widget_in_list(list, widget)) 1444 return true; 1445 } 1446 1447 return false; 1448 } 1449 1450 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1451 struct snd_soc_dapm_widget_list **list_) 1452 { 1453 struct snd_soc_dpcm *dpcm; 1454 int prune = 0; 1455 1456 /* Destroy any old FE <--> BE connections */ 1457 for_each_dpcm_be(fe, stream, dpcm) { 1458 if (dpcm_be_is_active(dpcm, stream, *list_)) 1459 continue; 1460 1461 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1462 stream ? "capture" : "playback", 1463 dpcm->be->dai_link->name, fe->dai_link->name); 1464 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1465 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1466 prune++; 1467 } 1468 1469 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1470 return prune; 1471 } 1472 1473 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1474 struct snd_soc_dapm_widget_list **list_) 1475 { 1476 struct snd_soc_card *card = fe->card; 1477 struct snd_soc_dapm_widget_list *list = *list_; 1478 struct snd_soc_pcm_runtime *be; 1479 struct snd_soc_dapm_widget *widget; 1480 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1481 int i, new = 0, err; 1482 1483 /* don't connect if FE is not running */ 1484 if (!fe_substream->runtime && !fe->fe_compr) 1485 return new; 1486 1487 /* Create any new FE <--> BE connections */ 1488 for_each_dapm_widgets(list, i, widget) { 1489 1490 switch (widget->id) { 1491 case snd_soc_dapm_dai_in: 1492 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1493 continue; 1494 break; 1495 case snd_soc_dapm_dai_out: 1496 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1497 continue; 1498 break; 1499 default: 1500 continue; 1501 } 1502 1503 /* is there a valid BE rtd for this widget */ 1504 be = dpcm_get_be(card, widget, stream); 1505 if (!be) { 1506 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1507 widget->name); 1508 continue; 1509 } 1510 1511 /* 1512 * Filter for systems with 'component_chaining' enabled. 1513 * This helps to avoid unnecessary re-configuration of an 1514 * already active BE on such systems. 1515 */ 1516 if (fe->card->component_chaining && 1517 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1518 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1519 continue; 1520 1521 /* newly connected FE and BE */ 1522 err = dpcm_be_connect(fe, be, stream); 1523 if (err < 0) { 1524 dev_err(fe->dev, "ASoC: can't connect %s\n", 1525 widget->name); 1526 break; 1527 } else if (err == 0) /* already connected */ 1528 continue; 1529 1530 /* new */ 1531 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1532 new++; 1533 } 1534 1535 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1536 return new; 1537 } 1538 1539 /* 1540 * Find the corresponding BE DAIs that source or sink audio to this 1541 * FE substream. 1542 */ 1543 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1544 int stream, struct snd_soc_dapm_widget_list **list, int new) 1545 { 1546 if (new) 1547 return dpcm_add_paths(fe, stream, list); 1548 else 1549 return dpcm_prune_paths(fe, stream, list); 1550 } 1551 1552 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1553 { 1554 struct snd_soc_dpcm *dpcm; 1555 1556 for_each_dpcm_be(fe, stream, dpcm) 1557 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1558 } 1559 1560 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1561 int do_hw_free, struct snd_soc_dpcm *last) 1562 { 1563 struct snd_soc_dpcm *dpcm; 1564 1565 /* disable any enabled and non active backends */ 1566 for_each_dpcm_be(fe, stream, dpcm) { 1567 struct snd_soc_pcm_runtime *be = dpcm->be; 1568 struct snd_pcm_substream *be_substream = 1569 snd_soc_dpcm_get_substream(be, stream); 1570 1571 if (dpcm == last) 1572 return; 1573 1574 /* is this op for this BE ? */ 1575 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1576 continue; 1577 1578 if (be->dpcm[stream].users == 0) { 1579 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1580 stream ? "capture" : "playback", 1581 be->dpcm[stream].state); 1582 continue; 1583 } 1584 1585 if (--be->dpcm[stream].users != 0) 1586 continue; 1587 1588 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1589 if (!do_hw_free) 1590 continue; 1591 1592 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1593 __soc_pcm_hw_free(be, be_substream); 1594 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1595 } 1596 } 1597 1598 __soc_pcm_close(be, be_substream); 1599 be_substream->runtime = NULL; 1600 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1601 } 1602 } 1603 1604 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1605 { 1606 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1607 struct snd_soc_pcm_runtime *be; 1608 struct snd_soc_dpcm *dpcm; 1609 int err, count = 0; 1610 1611 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1612 for_each_dpcm_be(fe, stream, dpcm) { 1613 struct snd_pcm_substream *be_substream; 1614 1615 be = dpcm->be; 1616 be_substream = snd_soc_dpcm_get_substream(be, stream); 1617 1618 if (!be_substream) { 1619 dev_err(be->dev, "ASoC: no backend %s stream\n", 1620 stream ? "capture" : "playback"); 1621 continue; 1622 } 1623 1624 /* is this op for this BE ? */ 1625 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1626 continue; 1627 1628 /* first time the dpcm is open ? */ 1629 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1630 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1631 stream ? "capture" : "playback", 1632 be->dpcm[stream].state); 1633 continue; 1634 } 1635 1636 if (be->dpcm[stream].users++ != 0) 1637 continue; 1638 1639 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1640 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1641 continue; 1642 1643 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1644 stream ? "capture" : "playback", be->dai_link->name); 1645 1646 be_substream->runtime = fe_substream->runtime; 1647 err = __soc_pcm_open(be, be_substream); 1648 if (err < 0) { 1649 be->dpcm[stream].users--; 1650 if (be->dpcm[stream].users < 0) 1651 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1652 stream ? "capture" : "playback", 1653 be->dpcm[stream].state); 1654 1655 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1656 goto unwind; 1657 } 1658 be->dpcm[stream].be_start = 0; 1659 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1660 count++; 1661 } 1662 1663 return count; 1664 1665 unwind: 1666 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1667 1668 return soc_pcm_ret(fe, err); 1669 } 1670 1671 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1672 { 1673 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1674 struct snd_pcm_runtime *runtime = substream->runtime; 1675 struct snd_pcm_hardware *hw = &runtime->hw; 1676 struct snd_soc_dai *dai; 1677 int stream = substream->stream; 1678 u64 formats = hw->formats; 1679 int i; 1680 1681 soc_pcm_hw_init(hw); 1682 1683 if (formats) 1684 hw->formats &= formats; 1685 1686 for_each_rtd_cpu_dais(fe, i, dai) { 1687 struct snd_soc_pcm_stream *cpu_stream; 1688 1689 /* 1690 * Skip CPUs which don't support the current stream 1691 * type. See soc_pcm_init_runtime_hw() for more details 1692 */ 1693 if (!snd_soc_dai_stream_valid(dai, stream)) 1694 continue; 1695 1696 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1697 1698 soc_pcm_hw_update_rate(hw, cpu_stream); 1699 soc_pcm_hw_update_chan(hw, cpu_stream); 1700 soc_pcm_hw_update_format(hw, cpu_stream); 1701 } 1702 1703 } 1704 1705 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1706 { 1707 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1708 struct snd_pcm_runtime *runtime = substream->runtime; 1709 struct snd_pcm_hardware *hw = &runtime->hw; 1710 struct snd_soc_dpcm *dpcm; 1711 struct snd_soc_dai *dai; 1712 int stream = substream->stream; 1713 1714 if (!fe->dai_link->dpcm_merged_format) 1715 return; 1716 1717 /* 1718 * It returns merged BE codec format 1719 * if FE want to use it (= dpcm_merged_format) 1720 */ 1721 1722 for_each_dpcm_be(fe, stream, dpcm) { 1723 struct snd_soc_pcm_runtime *be = dpcm->be; 1724 struct snd_soc_pcm_stream *codec_stream; 1725 int i; 1726 1727 for_each_rtd_codec_dais(be, i, dai) { 1728 /* 1729 * Skip CODECs which don't support the current stream 1730 * type. See soc_pcm_init_runtime_hw() for more details 1731 */ 1732 if (!snd_soc_dai_stream_valid(dai, stream)) 1733 continue; 1734 1735 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1736 1737 soc_pcm_hw_update_format(hw, codec_stream); 1738 } 1739 } 1740 } 1741 1742 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1743 { 1744 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1745 struct snd_pcm_runtime *runtime = substream->runtime; 1746 struct snd_pcm_hardware *hw = &runtime->hw; 1747 struct snd_soc_dpcm *dpcm; 1748 int stream = substream->stream; 1749 1750 if (!fe->dai_link->dpcm_merged_chan) 1751 return; 1752 1753 /* 1754 * It returns merged BE codec channel; 1755 * if FE want to use it (= dpcm_merged_chan) 1756 */ 1757 1758 for_each_dpcm_be(fe, stream, dpcm) { 1759 struct snd_soc_pcm_runtime *be = dpcm->be; 1760 struct snd_soc_pcm_stream *cpu_stream; 1761 struct snd_soc_dai *dai; 1762 int i; 1763 1764 for_each_rtd_cpu_dais(be, i, dai) { 1765 /* 1766 * Skip CPUs which don't support the current stream 1767 * type. See soc_pcm_init_runtime_hw() for more details 1768 */ 1769 if (!snd_soc_dai_stream_valid(dai, stream)) 1770 continue; 1771 1772 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1773 1774 soc_pcm_hw_update_chan(hw, cpu_stream); 1775 } 1776 1777 /* 1778 * chan min/max cannot be enforced if there are multiple CODEC 1779 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1780 */ 1781 if (be->dai_link->num_codecs == 1) { 1782 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1783 asoc_rtd_to_codec(be, 0), stream); 1784 1785 soc_pcm_hw_update_chan(hw, codec_stream); 1786 } 1787 } 1788 } 1789 1790 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1791 { 1792 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1793 struct snd_pcm_runtime *runtime = substream->runtime; 1794 struct snd_pcm_hardware *hw = &runtime->hw; 1795 struct snd_soc_dpcm *dpcm; 1796 int stream = substream->stream; 1797 1798 if (!fe->dai_link->dpcm_merged_rate) 1799 return; 1800 1801 /* 1802 * It returns merged BE codec channel; 1803 * if FE want to use it (= dpcm_merged_chan) 1804 */ 1805 1806 for_each_dpcm_be(fe, stream, dpcm) { 1807 struct snd_soc_pcm_runtime *be = dpcm->be; 1808 struct snd_soc_pcm_stream *pcm; 1809 struct snd_soc_dai *dai; 1810 int i; 1811 1812 for_each_rtd_dais(be, i, dai) { 1813 /* 1814 * Skip DAIs which don't support the current stream 1815 * type. See soc_pcm_init_runtime_hw() for more details 1816 */ 1817 if (!snd_soc_dai_stream_valid(dai, stream)) 1818 continue; 1819 1820 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1821 1822 soc_pcm_hw_update_rate(hw, pcm); 1823 } 1824 } 1825 } 1826 1827 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1828 int stream) 1829 { 1830 struct snd_soc_dpcm *dpcm; 1831 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1832 struct snd_soc_dai *fe_cpu_dai; 1833 int err = 0; 1834 int i; 1835 1836 /* apply symmetry for FE */ 1837 soc_pcm_update_symmetry(fe_substream); 1838 1839 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1840 /* Symmetry only applies if we've got an active stream. */ 1841 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1842 if (err < 0) 1843 goto error; 1844 } 1845 1846 /* apply symmetry for BE */ 1847 for_each_dpcm_be(fe, stream, dpcm) { 1848 struct snd_soc_pcm_runtime *be = dpcm->be; 1849 struct snd_pcm_substream *be_substream = 1850 snd_soc_dpcm_get_substream(be, stream); 1851 struct snd_soc_pcm_runtime *rtd; 1852 struct snd_soc_dai *dai; 1853 1854 /* A backend may not have the requested substream */ 1855 if (!be_substream) 1856 continue; 1857 1858 rtd = asoc_substream_to_rtd(be_substream); 1859 if (rtd->dai_link->be_hw_params_fixup) 1860 continue; 1861 1862 soc_pcm_update_symmetry(be_substream); 1863 1864 /* Symmetry only applies if we've got an active stream. */ 1865 for_each_rtd_dais(rtd, i, dai) { 1866 err = soc_pcm_apply_symmetry(fe_substream, dai); 1867 if (err < 0) 1868 goto error; 1869 } 1870 } 1871 error: 1872 return soc_pcm_ret(fe, err); 1873 } 1874 1875 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1876 { 1877 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1878 int stream = fe_substream->stream, ret = 0; 1879 1880 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1881 1882 ret = dpcm_be_dai_startup(fe, stream); 1883 if (ret < 0) 1884 goto be_err; 1885 1886 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1887 1888 /* start the DAI frontend */ 1889 ret = __soc_pcm_open(fe, fe_substream); 1890 if (ret < 0) 1891 goto unwind; 1892 1893 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1894 1895 dpcm_runtime_setup_fe(fe_substream); 1896 1897 dpcm_runtime_setup_be_format(fe_substream); 1898 dpcm_runtime_setup_be_chan(fe_substream); 1899 dpcm_runtime_setup_be_rate(fe_substream); 1900 1901 ret = dpcm_apply_symmetry(fe_substream, stream); 1902 1903 unwind: 1904 if (ret < 0) 1905 dpcm_be_dai_startup_unwind(fe, stream); 1906 be_err: 1907 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1908 1909 return soc_pcm_ret(fe, ret); 1910 } 1911 1912 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1913 { 1914 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1915 int stream = substream->stream; 1916 1917 snd_soc_dpcm_mutex_assert_held(fe); 1918 1919 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1920 1921 /* shutdown the BEs */ 1922 dpcm_be_dai_shutdown(fe, stream); 1923 1924 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1925 1926 /* now shutdown the frontend */ 1927 __soc_pcm_close(fe, substream); 1928 1929 /* run the stream stop event */ 1930 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1931 1932 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1933 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1934 return 0; 1935 } 1936 1937 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1938 { 1939 struct snd_soc_dpcm *dpcm; 1940 1941 /* only hw_params backends that are either sinks or sources 1942 * to this frontend DAI */ 1943 for_each_dpcm_be(fe, stream, dpcm) { 1944 1945 struct snd_soc_pcm_runtime *be = dpcm->be; 1946 struct snd_pcm_substream *be_substream = 1947 snd_soc_dpcm_get_substream(be, stream); 1948 1949 /* is this op for this BE ? */ 1950 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1951 continue; 1952 1953 /* only free hw when no longer used - check all FEs */ 1954 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1955 continue; 1956 1957 /* do not free hw if this BE is used by other FE */ 1958 if (be->dpcm[stream].users > 1) 1959 continue; 1960 1961 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1962 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1963 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1964 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1965 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1966 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1967 continue; 1968 1969 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1970 be->dai_link->name); 1971 1972 __soc_pcm_hw_free(be, be_substream); 1973 1974 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1975 } 1976 } 1977 1978 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1979 { 1980 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1981 int stream = substream->stream; 1982 1983 snd_soc_dpcm_mutex_lock(fe); 1984 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1985 1986 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1987 1988 /* call hw_free on the frontend */ 1989 soc_pcm_hw_clean(fe, substream, 0); 1990 1991 /* only hw_params backends that are either sinks or sources 1992 * to this frontend DAI */ 1993 dpcm_be_dai_hw_free(fe, stream); 1994 1995 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1996 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1997 1998 snd_soc_dpcm_mutex_unlock(fe); 1999 return 0; 2000 } 2001 2002 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2003 { 2004 struct snd_soc_pcm_runtime *be; 2005 struct snd_pcm_substream *be_substream; 2006 struct snd_soc_dpcm *dpcm; 2007 int ret; 2008 2009 for_each_dpcm_be(fe, stream, dpcm) { 2010 struct snd_pcm_hw_params hw_params; 2011 2012 be = dpcm->be; 2013 be_substream = snd_soc_dpcm_get_substream(be, stream); 2014 2015 /* is this op for this BE ? */ 2016 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2017 continue; 2018 2019 /* copy params for each dpcm */ 2020 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 2021 sizeof(struct snd_pcm_hw_params)); 2022 2023 /* perform any hw_params fixups */ 2024 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 2025 if (ret < 0) 2026 goto unwind; 2027 2028 /* copy the fixed-up hw params for BE dai */ 2029 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2030 sizeof(struct snd_pcm_hw_params)); 2031 2032 /* only allow hw_params() if no connected FEs are running */ 2033 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2034 continue; 2035 2036 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2037 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2038 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2039 continue; 2040 2041 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2042 be->dai_link->name); 2043 2044 ret = __soc_pcm_hw_params(be, be_substream, &hw_params); 2045 if (ret < 0) 2046 goto unwind; 2047 2048 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2049 } 2050 return 0; 2051 2052 unwind: 2053 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2054 __func__, be->dai_link->name, ret); 2055 2056 /* disable any enabled and non active backends */ 2057 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2058 be = dpcm->be; 2059 be_substream = snd_soc_dpcm_get_substream(be, stream); 2060 2061 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2062 continue; 2063 2064 /* only allow hw_free() if no connected FEs are running */ 2065 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2066 continue; 2067 2068 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2069 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2070 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2071 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2072 continue; 2073 2074 __soc_pcm_hw_free(be, be_substream); 2075 } 2076 2077 return ret; 2078 } 2079 2080 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2081 struct snd_pcm_hw_params *params) 2082 { 2083 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2084 int ret, stream = substream->stream; 2085 2086 snd_soc_dpcm_mutex_lock(fe); 2087 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2088 2089 memcpy(&fe->dpcm[stream].hw_params, params, 2090 sizeof(struct snd_pcm_hw_params)); 2091 ret = dpcm_be_dai_hw_params(fe, stream); 2092 if (ret < 0) 2093 goto out; 2094 2095 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2096 fe->dai_link->name, params_rate(params), 2097 params_channels(params), params_format(params)); 2098 2099 /* call hw_params on the frontend */ 2100 ret = __soc_pcm_hw_params(fe, substream, params); 2101 if (ret < 0) 2102 dpcm_be_dai_hw_free(fe, stream); 2103 else 2104 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2105 2106 out: 2107 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2108 snd_soc_dpcm_mutex_unlock(fe); 2109 2110 return soc_pcm_ret(fe, ret); 2111 } 2112 2113 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2114 int cmd) 2115 { 2116 struct snd_soc_pcm_runtime *be; 2117 bool pause_stop_transition; 2118 struct snd_soc_dpcm *dpcm; 2119 unsigned long flags; 2120 int ret = 0; 2121 2122 for_each_dpcm_be(fe, stream, dpcm) { 2123 struct snd_pcm_substream *be_substream; 2124 2125 be = dpcm->be; 2126 be_substream = snd_soc_dpcm_get_substream(be, stream); 2127 2128 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); 2129 2130 /* is this op for this BE ? */ 2131 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2132 goto next; 2133 2134 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2135 be->dai_link->name, cmd); 2136 2137 switch (cmd) { 2138 case SNDRV_PCM_TRIGGER_START: 2139 if (!be->dpcm[stream].be_start && 2140 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2141 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2142 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2143 goto next; 2144 2145 be->dpcm[stream].be_start++; 2146 if (be->dpcm[stream].be_start != 1) 2147 goto next; 2148 2149 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2150 ret = soc_pcm_trigger(be_substream, 2151 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2152 else 2153 ret = soc_pcm_trigger(be_substream, 2154 SNDRV_PCM_TRIGGER_START); 2155 if (ret) { 2156 be->dpcm[stream].be_start--; 2157 goto next; 2158 } 2159 2160 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2161 break; 2162 case SNDRV_PCM_TRIGGER_RESUME: 2163 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2164 goto next; 2165 2166 be->dpcm[stream].be_start++; 2167 if (be->dpcm[stream].be_start != 1) 2168 goto next; 2169 2170 ret = soc_pcm_trigger(be_substream, cmd); 2171 if (ret) { 2172 be->dpcm[stream].be_start--; 2173 goto next; 2174 } 2175 2176 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2177 break; 2178 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2179 if (!be->dpcm[stream].be_start && 2180 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2181 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2182 goto next; 2183 2184 fe->dpcm[stream].fe_pause = false; 2185 be->dpcm[stream].be_pause--; 2186 2187 be->dpcm[stream].be_start++; 2188 if (be->dpcm[stream].be_start != 1) 2189 goto next; 2190 2191 ret = soc_pcm_trigger(be_substream, cmd); 2192 if (ret) { 2193 be->dpcm[stream].be_start--; 2194 goto next; 2195 } 2196 2197 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2198 break; 2199 case SNDRV_PCM_TRIGGER_STOP: 2200 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2201 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2202 goto next; 2203 2204 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2205 be->dpcm[stream].be_start--; 2206 2207 if (be->dpcm[stream].be_start != 0) 2208 goto next; 2209 2210 pause_stop_transition = false; 2211 if (fe->dpcm[stream].fe_pause) { 2212 pause_stop_transition = true; 2213 fe->dpcm[stream].fe_pause = false; 2214 be->dpcm[stream].be_pause--; 2215 } 2216 2217 if (be->dpcm[stream].be_pause != 0) 2218 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2219 else 2220 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2221 2222 if (ret) { 2223 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2224 be->dpcm[stream].be_start++; 2225 if (pause_stop_transition) { 2226 fe->dpcm[stream].fe_pause = true; 2227 be->dpcm[stream].be_pause++; 2228 } 2229 goto next; 2230 } 2231 2232 if (be->dpcm[stream].be_pause != 0) 2233 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2234 else 2235 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2236 2237 break; 2238 case SNDRV_PCM_TRIGGER_SUSPEND: 2239 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2240 goto next; 2241 2242 be->dpcm[stream].be_start--; 2243 if (be->dpcm[stream].be_start != 0) 2244 goto next; 2245 2246 ret = soc_pcm_trigger(be_substream, cmd); 2247 if (ret) { 2248 be->dpcm[stream].be_start++; 2249 goto next; 2250 } 2251 2252 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2253 break; 2254 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2255 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2256 goto next; 2257 2258 fe->dpcm[stream].fe_pause = true; 2259 be->dpcm[stream].be_pause++; 2260 2261 be->dpcm[stream].be_start--; 2262 if (be->dpcm[stream].be_start != 0) 2263 goto next; 2264 2265 ret = soc_pcm_trigger(be_substream, cmd); 2266 if (ret) { 2267 be->dpcm[stream].be_start++; 2268 goto next; 2269 } 2270 2271 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2272 break; 2273 } 2274 next: 2275 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2276 if (ret) 2277 break; 2278 } 2279 return soc_pcm_ret(fe, ret); 2280 } 2281 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2282 2283 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2284 int cmd, bool fe_first) 2285 { 2286 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2287 int ret; 2288 2289 /* call trigger on the frontend before the backend. */ 2290 if (fe_first) { 2291 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2292 fe->dai_link->name, cmd); 2293 2294 ret = soc_pcm_trigger(substream, cmd); 2295 if (ret < 0) 2296 return ret; 2297 2298 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2299 return ret; 2300 } 2301 2302 /* call trigger on the frontend after the backend. */ 2303 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2304 if (ret < 0) 2305 return ret; 2306 2307 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2308 fe->dai_link->name, cmd); 2309 2310 ret = soc_pcm_trigger(substream, cmd); 2311 2312 return ret; 2313 } 2314 2315 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2316 { 2317 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2318 int stream = substream->stream; 2319 int ret = 0; 2320 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2321 2322 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2323 2324 switch (trigger) { 2325 case SND_SOC_DPCM_TRIGGER_PRE: 2326 switch (cmd) { 2327 case SNDRV_PCM_TRIGGER_START: 2328 case SNDRV_PCM_TRIGGER_RESUME: 2329 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2330 case SNDRV_PCM_TRIGGER_DRAIN: 2331 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2332 break; 2333 case SNDRV_PCM_TRIGGER_STOP: 2334 case SNDRV_PCM_TRIGGER_SUSPEND: 2335 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2336 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2337 break; 2338 default: 2339 ret = -EINVAL; 2340 break; 2341 } 2342 break; 2343 case SND_SOC_DPCM_TRIGGER_POST: 2344 switch (cmd) { 2345 case SNDRV_PCM_TRIGGER_START: 2346 case SNDRV_PCM_TRIGGER_RESUME: 2347 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2348 case SNDRV_PCM_TRIGGER_DRAIN: 2349 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2350 break; 2351 case SNDRV_PCM_TRIGGER_STOP: 2352 case SNDRV_PCM_TRIGGER_SUSPEND: 2353 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2354 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2355 break; 2356 default: 2357 ret = -EINVAL; 2358 break; 2359 } 2360 break; 2361 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2362 /* bespoke trigger() - handles both FE and BEs */ 2363 2364 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2365 fe->dai_link->name, cmd); 2366 2367 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2368 break; 2369 default: 2370 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2371 fe->dai_link->name); 2372 ret = -EINVAL; 2373 goto out; 2374 } 2375 2376 if (ret < 0) { 2377 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2378 cmd, ret); 2379 goto out; 2380 } 2381 2382 switch (cmd) { 2383 case SNDRV_PCM_TRIGGER_START: 2384 case SNDRV_PCM_TRIGGER_RESUME: 2385 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2386 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2387 break; 2388 case SNDRV_PCM_TRIGGER_STOP: 2389 case SNDRV_PCM_TRIGGER_SUSPEND: 2390 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2391 break; 2392 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2393 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2394 break; 2395 } 2396 2397 out: 2398 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2399 return ret; 2400 } 2401 2402 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2403 { 2404 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2405 int stream = substream->stream; 2406 2407 /* if FE's runtime_update is already set, we're in race; 2408 * process this trigger later at exit 2409 */ 2410 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2411 fe->dpcm[stream].trigger_pending = cmd + 1; 2412 return 0; /* delayed, assuming it's successful */ 2413 } 2414 2415 /* we're alone, let's trigger */ 2416 return dpcm_fe_dai_do_trigger(substream, cmd); 2417 } 2418 2419 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2420 { 2421 struct snd_soc_dpcm *dpcm; 2422 int ret = 0; 2423 2424 for_each_dpcm_be(fe, stream, dpcm) { 2425 2426 struct snd_soc_pcm_runtime *be = dpcm->be; 2427 struct snd_pcm_substream *be_substream = 2428 snd_soc_dpcm_get_substream(be, stream); 2429 2430 /* is this op for this BE ? */ 2431 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2432 continue; 2433 2434 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream)) 2435 continue; 2436 2437 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2438 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2439 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2440 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2441 continue; 2442 2443 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2444 be->dai_link->name); 2445 2446 ret = __soc_pcm_prepare(be, be_substream); 2447 if (ret < 0) 2448 break; 2449 2450 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2451 } 2452 2453 return soc_pcm_ret(fe, ret); 2454 } 2455 2456 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2457 { 2458 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2459 int stream = substream->stream, ret = 0; 2460 2461 snd_soc_dpcm_mutex_lock(fe); 2462 2463 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2464 2465 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2466 2467 /* there is no point preparing this FE if there are no BEs */ 2468 if (list_empty(&fe->dpcm[stream].be_clients)) { 2469 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2470 fe->dai_link->name); 2471 ret = -EINVAL; 2472 goto out; 2473 } 2474 2475 ret = dpcm_be_dai_prepare(fe, stream); 2476 if (ret < 0) 2477 goto out; 2478 2479 /* call prepare on the frontend */ 2480 ret = __soc_pcm_prepare(fe, substream); 2481 if (ret < 0) 2482 goto out; 2483 2484 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2485 2486 out: 2487 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2488 snd_soc_dpcm_mutex_unlock(fe); 2489 2490 return soc_pcm_ret(fe, ret); 2491 } 2492 2493 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2494 { 2495 struct snd_pcm_substream *substream = 2496 snd_soc_dpcm_get_substream(fe, stream); 2497 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2498 int err; 2499 2500 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2501 stream ? "capture" : "playback", fe->dai_link->name); 2502 2503 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2504 /* call bespoke trigger - FE takes care of all BE triggers */ 2505 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2506 fe->dai_link->name); 2507 2508 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2509 } else { 2510 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2511 fe->dai_link->name); 2512 2513 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2514 } 2515 2516 dpcm_be_dai_hw_free(fe, stream); 2517 2518 dpcm_be_dai_shutdown(fe, stream); 2519 2520 /* run the stream event for each BE */ 2521 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2522 2523 return soc_pcm_ret(fe, err); 2524 } 2525 2526 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2527 { 2528 struct snd_pcm_substream *substream = 2529 snd_soc_dpcm_get_substream(fe, stream); 2530 struct snd_soc_dpcm *dpcm; 2531 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2532 int ret = 0; 2533 2534 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2535 stream ? "capture" : "playback", fe->dai_link->name); 2536 2537 /* Only start the BE if the FE is ready */ 2538 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2539 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2540 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2541 fe->dai_link->name, fe->dpcm[stream].state); 2542 ret = -EINVAL; 2543 goto disconnect; 2544 } 2545 2546 /* startup must always be called for new BEs */ 2547 ret = dpcm_be_dai_startup(fe, stream); 2548 if (ret < 0) 2549 goto disconnect; 2550 2551 /* keep going if FE state is > open */ 2552 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2553 return 0; 2554 2555 ret = dpcm_be_dai_hw_params(fe, stream); 2556 if (ret < 0) 2557 goto close; 2558 2559 /* keep going if FE state is > hw_params */ 2560 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2561 return 0; 2562 2563 ret = dpcm_be_dai_prepare(fe, stream); 2564 if (ret < 0) 2565 goto hw_free; 2566 2567 /* run the stream event for each BE */ 2568 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2569 2570 /* keep going if FE state is > prepare */ 2571 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2572 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2573 return 0; 2574 2575 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2576 /* call trigger on the frontend - FE takes care of all BE triggers */ 2577 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2578 fe->dai_link->name); 2579 2580 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2581 if (ret < 0) 2582 goto hw_free; 2583 } else { 2584 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2585 fe->dai_link->name); 2586 2587 ret = dpcm_be_dai_trigger(fe, stream, 2588 SNDRV_PCM_TRIGGER_START); 2589 if (ret < 0) 2590 goto hw_free; 2591 } 2592 2593 return 0; 2594 2595 hw_free: 2596 dpcm_be_dai_hw_free(fe, stream); 2597 close: 2598 dpcm_be_dai_shutdown(fe, stream); 2599 disconnect: 2600 /* disconnect any pending BEs */ 2601 for_each_dpcm_be(fe, stream, dpcm) { 2602 struct snd_soc_pcm_runtime *be = dpcm->be; 2603 2604 /* is this op for this BE ? */ 2605 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2606 continue; 2607 2608 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2609 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2610 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2611 } 2612 2613 return soc_pcm_ret(fe, ret); 2614 } 2615 2616 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2617 { 2618 struct snd_soc_dapm_widget_list *list; 2619 int stream; 2620 int count, paths; 2621 2622 if (!fe->dai_link->dynamic) 2623 return 0; 2624 2625 if (fe->dai_link->num_cpus > 1) { 2626 dev_err(fe->dev, 2627 "%s doesn't support Multi CPU yet\n", __func__); 2628 return -EINVAL; 2629 } 2630 2631 /* only check active links */ 2632 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2633 return 0; 2634 2635 /* DAPM sync will call this to update DSP paths */ 2636 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2637 new ? "new" : "old", fe->dai_link->name); 2638 2639 for_each_pcm_streams(stream) { 2640 2641 /* skip if FE doesn't have playback/capture capability */ 2642 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2643 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2644 continue; 2645 2646 /* skip if FE isn't currently playing/capturing */ 2647 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2648 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2649 continue; 2650 2651 paths = dpcm_path_get(fe, stream, &list); 2652 if (paths < 0) 2653 return paths; 2654 2655 /* update any playback/capture paths */ 2656 count = dpcm_process_paths(fe, stream, &list, new); 2657 if (count) { 2658 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2659 if (new) 2660 dpcm_run_update_startup(fe, stream); 2661 else 2662 dpcm_run_update_shutdown(fe, stream); 2663 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2664 2665 dpcm_clear_pending_state(fe, stream); 2666 dpcm_be_disconnect(fe, stream); 2667 } 2668 2669 dpcm_path_put(&list); 2670 } 2671 2672 return 0; 2673 } 2674 2675 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2676 * any DAI links. 2677 */ 2678 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2679 { 2680 struct snd_soc_pcm_runtime *fe; 2681 int ret = 0; 2682 2683 snd_soc_dpcm_mutex_lock(card); 2684 /* shutdown all old paths first */ 2685 for_each_card_rtds(card, fe) { 2686 ret = soc_dpcm_fe_runtime_update(fe, 0); 2687 if (ret) 2688 goto out; 2689 } 2690 2691 /* bring new paths up */ 2692 for_each_card_rtds(card, fe) { 2693 ret = soc_dpcm_fe_runtime_update(fe, 1); 2694 if (ret) 2695 goto out; 2696 } 2697 2698 out: 2699 snd_soc_dpcm_mutex_unlock(card); 2700 return ret; 2701 } 2702 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2703 2704 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2705 { 2706 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2707 struct snd_soc_dpcm *dpcm; 2708 int stream = fe_substream->stream; 2709 2710 snd_soc_dpcm_mutex_assert_held(fe); 2711 2712 /* mark FE's links ready to prune */ 2713 for_each_dpcm_be(fe, stream, dpcm) 2714 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2715 2716 dpcm_be_disconnect(fe, stream); 2717 } 2718 2719 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2720 { 2721 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2722 int ret; 2723 2724 snd_soc_dpcm_mutex_lock(fe); 2725 ret = dpcm_fe_dai_shutdown(fe_substream); 2726 2727 dpcm_fe_dai_cleanup(fe_substream); 2728 2729 snd_soc_dpcm_mutex_unlock(fe); 2730 return ret; 2731 } 2732 2733 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2734 { 2735 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2736 struct snd_soc_dapm_widget_list *list; 2737 int ret; 2738 int stream = fe_substream->stream; 2739 2740 snd_soc_dpcm_mutex_lock(fe); 2741 2742 ret = dpcm_path_get(fe, stream, &list); 2743 if (ret < 0) 2744 goto open_end; 2745 2746 /* calculate valid and active FE <-> BE dpcms */ 2747 dpcm_process_paths(fe, stream, &list, 1); 2748 2749 ret = dpcm_fe_dai_startup(fe_substream); 2750 if (ret < 0) 2751 dpcm_fe_dai_cleanup(fe_substream); 2752 2753 dpcm_clear_pending_state(fe, stream); 2754 dpcm_path_put(&list); 2755 open_end: 2756 snd_soc_dpcm_mutex_unlock(fe); 2757 return ret; 2758 } 2759 2760 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2761 int *playback, int *capture) 2762 { 2763 struct snd_soc_dai_link *dai_link = rtd->dai_link; 2764 struct snd_soc_dai *cpu_dai; 2765 int has_playback = 0; 2766 int has_capture = 0; 2767 int i; 2768 2769 if (dai_link->dynamic && dai_link->num_cpus > 1) { 2770 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2771 return -EINVAL; 2772 } 2773 2774 if (dai_link->dynamic || dai_link->no_pcm) { 2775 int stream; 2776 2777 if (dai_link->dpcm_playback) { 2778 stream = SNDRV_PCM_STREAM_PLAYBACK; 2779 2780 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2781 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2782 has_playback = 1; 2783 break; 2784 } 2785 } 2786 if (!has_playback) { 2787 dev_err(rtd->card->dev, 2788 "No CPU DAIs support playback for stream %s\n", 2789 dai_link->stream_name); 2790 return -EINVAL; 2791 } 2792 } 2793 if (dai_link->dpcm_capture) { 2794 stream = SNDRV_PCM_STREAM_CAPTURE; 2795 2796 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2797 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2798 has_capture = 1; 2799 break; 2800 } 2801 } 2802 2803 if (!has_capture) { 2804 dev_err(rtd->card->dev, 2805 "No CPU DAIs support capture for stream %s\n", 2806 dai_link->stream_name); 2807 return -EINVAL; 2808 } 2809 } 2810 } else { 2811 struct snd_soc_dai *codec_dai; 2812 2813 /* Adapt stream for codec2codec links */ 2814 int cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE); 2815 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK); 2816 2817 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2818 if (dai_link->num_cpus == 1) { 2819 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2820 } else if (dai_link->num_cpus == dai_link->num_codecs) { 2821 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2822 } else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) { 2823 int cpu_id; 2824 2825 if (!rtd->dai_link->codec_ch_maps) { 2826 dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n", 2827 __func__); 2828 return -EINVAL; 2829 } 2830 2831 cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id; 2832 cpu_dai = asoc_rtd_to_cpu(rtd, cpu_id); 2833 } else { 2834 dev_err(rtd->card->dev, 2835 "%s codec number %d < cpu number %d is not supported\n", 2836 __func__, rtd->dai_link->num_codecs, 2837 rtd->dai_link->num_cpus); 2838 return -EINVAL; 2839 } 2840 2841 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2842 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2843 has_playback = 1; 2844 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2845 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2846 has_capture = 1; 2847 } 2848 } 2849 2850 if (dai_link->playback_only) 2851 has_capture = 0; 2852 2853 if (dai_link->capture_only) 2854 has_playback = 0; 2855 2856 if (!has_playback && !has_capture) { 2857 dev_err(rtd->dev, "substream %s has no playback, no capture\n", 2858 dai_link->stream_name); 2859 2860 return -EINVAL; 2861 } 2862 2863 *playback = has_playback; 2864 *capture = has_capture; 2865 2866 return 0; 2867 } 2868 2869 static int soc_create_pcm(struct snd_pcm **pcm, 2870 struct snd_soc_pcm_runtime *rtd, 2871 int playback, int capture, int num) 2872 { 2873 char new_name[64]; 2874 int ret; 2875 2876 /* create the PCM */ 2877 if (rtd->dai_link->c2c_params) { 2878 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2879 rtd->dai_link->stream_name); 2880 2881 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2882 playback, capture, pcm); 2883 } else if (rtd->dai_link->no_pcm) { 2884 snprintf(new_name, sizeof(new_name), "(%s)", 2885 rtd->dai_link->stream_name); 2886 2887 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2888 playback, capture, pcm); 2889 } else { 2890 if (rtd->dai_link->dynamic) 2891 snprintf(new_name, sizeof(new_name), "%s (*)", 2892 rtd->dai_link->stream_name); 2893 else 2894 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2895 rtd->dai_link->stream_name, 2896 soc_codec_dai_name(rtd), num); 2897 2898 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2899 capture, pcm); 2900 } 2901 if (ret < 0) { 2902 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2903 new_name, rtd->dai_link->name, ret); 2904 return ret; 2905 } 2906 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2907 2908 return 0; 2909 } 2910 2911 /* create a new pcm */ 2912 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2913 { 2914 struct snd_soc_component *component; 2915 struct snd_pcm *pcm; 2916 int ret = 0, playback = 0, capture = 0; 2917 int i; 2918 2919 ret = soc_get_playback_capture(rtd, &playback, &capture); 2920 if (ret < 0) 2921 return ret; 2922 2923 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2924 if (ret < 0) 2925 return ret; 2926 2927 /* DAPM dai link stream work */ 2928 /* 2929 * Currently nothing to do for c2c links 2930 * Since c2c links are internal nodes in the DAPM graph and 2931 * don't interface with the outside world or application layer 2932 * we don't have to do any special handling on close. 2933 */ 2934 if (!rtd->dai_link->c2c_params) 2935 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2936 2937 rtd->pcm = pcm; 2938 pcm->nonatomic = rtd->dai_link->nonatomic; 2939 pcm->private_data = rtd; 2940 pcm->no_device_suspend = true; 2941 2942 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { 2943 if (playback) 2944 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2945 if (capture) 2946 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2947 goto out; 2948 } 2949 2950 /* ASoC PCM operations */ 2951 if (rtd->dai_link->dynamic) { 2952 rtd->ops.open = dpcm_fe_dai_open; 2953 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2954 rtd->ops.prepare = dpcm_fe_dai_prepare; 2955 rtd->ops.trigger = dpcm_fe_dai_trigger; 2956 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2957 rtd->ops.close = dpcm_fe_dai_close; 2958 rtd->ops.pointer = soc_pcm_pointer; 2959 } else { 2960 rtd->ops.open = soc_pcm_open; 2961 rtd->ops.hw_params = soc_pcm_hw_params; 2962 rtd->ops.prepare = soc_pcm_prepare; 2963 rtd->ops.trigger = soc_pcm_trigger; 2964 rtd->ops.hw_free = soc_pcm_hw_free; 2965 rtd->ops.close = soc_pcm_close; 2966 rtd->ops.pointer = soc_pcm_pointer; 2967 } 2968 2969 for_each_rtd_components(rtd, i, component) { 2970 const struct snd_soc_component_driver *drv = component->driver; 2971 2972 if (drv->ioctl) 2973 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2974 if (drv->sync_stop) 2975 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2976 if (drv->copy_user) 2977 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2978 if (drv->page) 2979 rtd->ops.page = snd_soc_pcm_component_page; 2980 if (drv->mmap) 2981 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2982 if (drv->ack) 2983 rtd->ops.ack = snd_soc_pcm_component_ack; 2984 } 2985 2986 if (playback) 2987 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2988 2989 if (capture) 2990 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2991 2992 ret = snd_soc_pcm_component_new(rtd); 2993 if (ret < 0) 2994 return ret; 2995 out: 2996 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2997 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2998 return ret; 2999 } 3000 3001 /* is the current PCM operation for this FE ? */ 3002 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 3003 { 3004 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 3005 return 1; 3006 return 0; 3007 } 3008 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 3009 3010 /* is the current PCM operation for this BE ? */ 3011 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 3012 struct snd_soc_pcm_runtime *be, int stream) 3013 { 3014 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 3015 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 3016 be->dpcm[stream].runtime_update)) 3017 return 1; 3018 return 0; 3019 } 3020 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 3021 3022 /* get the substream for this BE */ 3023 struct snd_pcm_substream * 3024 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3025 { 3026 return be->pcm->streams[stream].substream; 3027 } 3028 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3029 3030 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 3031 struct snd_soc_pcm_runtime *be, 3032 int stream, 3033 const enum snd_soc_dpcm_state *states, 3034 int num_states) 3035 { 3036 struct snd_soc_dpcm *dpcm; 3037 int state; 3038 int ret = 1; 3039 int i; 3040 3041 for_each_dpcm_fe(be, stream, dpcm) { 3042 3043 if (dpcm->fe == fe) 3044 continue; 3045 3046 state = dpcm->fe->dpcm[stream].state; 3047 for (i = 0; i < num_states; i++) { 3048 if (state == states[i]) { 3049 ret = 0; 3050 break; 3051 } 3052 } 3053 } 3054 3055 /* it's safe to do this BE DAI */ 3056 return ret; 3057 } 3058 3059 /* 3060 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3061 * are not running, paused or suspended for the specified stream direction. 3062 */ 3063 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3064 struct snd_soc_pcm_runtime *be, int stream) 3065 { 3066 const enum snd_soc_dpcm_state state[] = { 3067 SND_SOC_DPCM_STATE_START, 3068 SND_SOC_DPCM_STATE_PAUSED, 3069 SND_SOC_DPCM_STATE_SUSPEND, 3070 }; 3071 3072 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3073 } 3074 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3075 3076 /* 3077 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3078 * running, paused or suspended for the specified stream direction. 3079 */ 3080 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3081 struct snd_soc_pcm_runtime *be, int stream) 3082 { 3083 const enum snd_soc_dpcm_state state[] = { 3084 SND_SOC_DPCM_STATE_START, 3085 SND_SOC_DPCM_STATE_PAUSED, 3086 SND_SOC_DPCM_STATE_SUSPEND, 3087 SND_SOC_DPCM_STATE_PREPARE, 3088 }; 3089 3090 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3091 } 3092 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3093 3094 /* 3095 * We can only prepare a BE DAI if any of it's FE are not prepared, 3096 * running or paused for the specified stream direction. 3097 */ 3098 int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe, 3099 struct snd_soc_pcm_runtime *be, int stream) 3100 { 3101 const enum snd_soc_dpcm_state state[] = { 3102 SND_SOC_DPCM_STATE_START, 3103 SND_SOC_DPCM_STATE_PAUSED, 3104 SND_SOC_DPCM_STATE_PREPARE, 3105 }; 3106 3107 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3108 } 3109 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared); 3110