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 case -EINVAL: 42 break; 43 default: 44 dev_err(rtd->dev, 45 "ASoC: error at %s on %s: %d\n", 46 func, rtd->dai_link->name, ret); 47 } 48 49 return ret; 50 } 51 52 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd, 53 int stream) 54 { 55 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 56 } 57 58 #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \ 59 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags) 60 61 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd, 62 int stream) 63 { 64 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 65 } 66 67 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \ 68 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags) 69 70 #define DPCM_MAX_BE_USERS 8 71 72 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 73 { 74 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 75 } 76 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 77 { 78 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 79 } 80 81 #ifdef CONFIG_DEBUG_FS 82 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 83 { 84 switch (state) { 85 case SND_SOC_DPCM_STATE_NEW: 86 return "new"; 87 case SND_SOC_DPCM_STATE_OPEN: 88 return "open"; 89 case SND_SOC_DPCM_STATE_HW_PARAMS: 90 return "hw_params"; 91 case SND_SOC_DPCM_STATE_PREPARE: 92 return "prepare"; 93 case SND_SOC_DPCM_STATE_START: 94 return "start"; 95 case SND_SOC_DPCM_STATE_STOP: 96 return "stop"; 97 case SND_SOC_DPCM_STATE_SUSPEND: 98 return "suspend"; 99 case SND_SOC_DPCM_STATE_PAUSED: 100 return "paused"; 101 case SND_SOC_DPCM_STATE_HW_FREE: 102 return "hw_free"; 103 case SND_SOC_DPCM_STATE_CLOSE: 104 return "close"; 105 } 106 107 return "unknown"; 108 } 109 110 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 111 int stream, char *buf, size_t size) 112 { 113 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 114 struct snd_soc_dpcm *dpcm; 115 ssize_t offset = 0; 116 117 /* FE state */ 118 offset += scnprintf(buf + offset, size - offset, 119 "[%s - %s]\n", fe->dai_link->name, 120 stream ? "Capture" : "Playback"); 121 122 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 123 dpcm_state_string(fe->dpcm[stream].state)); 124 125 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 126 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 127 offset += scnprintf(buf + offset, size - offset, 128 "Hardware Params: " 129 "Format = %s, Channels = %d, Rate = %d\n", 130 snd_pcm_format_name(params_format(params)), 131 params_channels(params), 132 params_rate(params)); 133 134 /* BEs state */ 135 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 136 137 if (list_empty(&fe->dpcm[stream].be_clients)) { 138 offset += scnprintf(buf + offset, size - offset, 139 " No active DSP links\n"); 140 goto out; 141 } 142 143 for_each_dpcm_be(fe, stream, dpcm) { 144 struct snd_soc_pcm_runtime *be = dpcm->be; 145 params = &be->dpcm[stream].hw_params; 146 147 offset += scnprintf(buf + offset, size - offset, 148 "- %s\n", be->dai_link->name); 149 150 offset += scnprintf(buf + offset, size - offset, 151 " State: %s\n", 152 dpcm_state_string(be->dpcm[stream].state)); 153 154 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 155 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 156 offset += scnprintf(buf + offset, size - offset, 157 " Hardware Params: " 158 "Format = %s, Channels = %d, Rate = %d\n", 159 snd_pcm_format_name(params_format(params)), 160 params_channels(params), 161 params_rate(params)); 162 } 163 out: 164 return offset; 165 } 166 167 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 168 size_t count, loff_t *ppos) 169 { 170 struct snd_soc_pcm_runtime *fe = file->private_data; 171 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 172 int stream; 173 char *buf; 174 175 if (fe->dai_link->num_cpus > 1) { 176 dev_err(fe->dev, 177 "%s doesn't support Multi CPU yet\n", __func__); 178 return -EINVAL; 179 } 180 181 buf = kmalloc(out_count, GFP_KERNEL); 182 if (!buf) 183 return -ENOMEM; 184 185 snd_soc_dpcm_mutex_lock(fe); 186 for_each_pcm_streams(stream) 187 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 188 offset += dpcm_show_state(fe, stream, 189 buf + offset, 190 out_count - offset); 191 snd_soc_dpcm_mutex_unlock(fe); 192 193 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 194 195 kfree(buf); 196 return ret; 197 } 198 199 static const struct file_operations dpcm_state_fops = { 200 .open = simple_open, 201 .read = dpcm_state_read_file, 202 .llseek = default_llseek, 203 }; 204 205 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 206 { 207 if (!rtd->dai_link->dynamic) 208 return; 209 210 if (!rtd->card->debugfs_card_root) 211 return; 212 213 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 214 rtd->card->debugfs_card_root); 215 216 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 217 rtd, &dpcm_state_fops); 218 } 219 220 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 221 { 222 char *name; 223 224 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 225 stream ? "capture" : "playback"); 226 if (name) { 227 dpcm->debugfs_state = debugfs_create_dir( 228 name, dpcm->fe->debugfs_dpcm_root); 229 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 230 &dpcm->state); 231 kfree(name); 232 } 233 } 234 235 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 236 { 237 debugfs_remove_recursive(dpcm->debugfs_state); 238 } 239 240 #else 241 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 242 int stream) 243 { 244 } 245 246 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 247 { 248 } 249 #endif 250 251 /* Set FE's runtime_update state; the state is protected via PCM stream lock 252 * for avoiding the race with trigger callback. 253 * If the state is unset and a trigger is pending while the previous operation, 254 * process the pending trigger action here. 255 */ 256 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 257 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 258 int stream, enum snd_soc_dpcm_update state) 259 { 260 struct snd_pcm_substream *substream = 261 snd_soc_dpcm_get_substream(fe, stream); 262 263 snd_soc_dpcm_stream_lock_irq(fe, stream); 264 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 265 dpcm_fe_dai_do_trigger(substream, 266 fe->dpcm[stream].trigger_pending - 1); 267 fe->dpcm[stream].trigger_pending = 0; 268 } 269 fe->dpcm[stream].runtime_update = state; 270 snd_soc_dpcm_stream_unlock_irq(fe, stream); 271 } 272 273 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 274 int stream, enum snd_soc_dpcm_update state) 275 { 276 be->dpcm[stream].runtime_update = state; 277 } 278 279 /** 280 * snd_soc_runtime_action() - Increment/Decrement active count for 281 * PCM runtime components 282 * @rtd: ASoC PCM runtime that is activated 283 * @stream: Direction of the PCM stream 284 * @action: Activate stream if 1. Deactivate if -1. 285 * 286 * Increments/Decrements the active count for all the DAIs and components 287 * attached to a PCM runtime. 288 * Should typically be called when a stream is opened. 289 * 290 * Must be called with the rtd->card->pcm_mutex being held 291 */ 292 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 293 int stream, int action) 294 { 295 struct snd_soc_dai *dai; 296 int i; 297 298 snd_soc_dpcm_mutex_assert_held(rtd); 299 300 for_each_rtd_dais(rtd, i, dai) 301 snd_soc_dai_action(dai, stream, action); 302 } 303 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 304 305 /** 306 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 307 * @rtd: The ASoC PCM runtime that should be checked. 308 * 309 * This function checks whether the power down delay should be ignored for a 310 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 311 * been configured to ignore the delay, or if none of the components benefits 312 * from having the delay. 313 */ 314 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 315 { 316 struct snd_soc_component *component; 317 bool ignore = true; 318 int i; 319 320 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 321 return true; 322 323 for_each_rtd_components(rtd, i, component) 324 ignore &= !component->driver->use_pmdown_time; 325 326 return ignore; 327 } 328 329 /** 330 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 331 * @substream: the pcm substream 332 * @hw: the hardware parameters 333 * 334 * Sets the substream runtime hardware parameters. 335 */ 336 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 337 const struct snd_pcm_hardware *hw) 338 { 339 substream->runtime->hw = *hw; 340 341 return 0; 342 } 343 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 344 345 /* DPCM stream event, send event to FE and all active BEs. */ 346 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 347 int event) 348 { 349 struct snd_soc_dpcm *dpcm; 350 351 snd_soc_dpcm_mutex_assert_held(fe); 352 353 for_each_dpcm_be(fe, dir, dpcm) { 354 355 struct snd_soc_pcm_runtime *be = dpcm->be; 356 357 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 358 be->dai_link->name, event, dir); 359 360 if ((event == SND_SOC_DAPM_STREAM_STOP) && 361 (be->dpcm[dir].users >= 1)) 362 continue; 363 364 snd_soc_dapm_stream_event(be, dir, event); 365 } 366 367 snd_soc_dapm_stream_event(fe, dir, event); 368 369 return 0; 370 } 371 372 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 373 struct snd_pcm_hw_params *params) 374 { 375 if (params) { 376 dai->rate = params_rate(params); 377 dai->channels = params_channels(params); 378 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 379 } else { 380 dai->rate = 0; 381 dai->channels = 0; 382 dai->sample_bits = 0; 383 } 384 } 385 386 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 387 struct snd_soc_dai *soc_dai) 388 { 389 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 390 int ret; 391 392 if (!snd_soc_dai_active(soc_dai)) 393 return 0; 394 395 #define __soc_pcm_apply_symmetry(name, NAME) \ 396 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 397 rtd->dai_link->symmetric_##name)) { \ 398 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 399 #name, soc_dai->name); \ 400 \ 401 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 402 SNDRV_PCM_HW_PARAM_##NAME,\ 403 soc_dai->name); \ 404 if (ret < 0) { \ 405 dev_err(soc_dai->dev, \ 406 "ASoC: Unable to apply %s constraint: %d\n",\ 407 #name, ret); \ 408 return ret; \ 409 } \ 410 } 411 412 __soc_pcm_apply_symmetry(rate, RATE); 413 __soc_pcm_apply_symmetry(channels, CHANNELS); 414 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 415 416 return 0; 417 } 418 419 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 420 struct snd_pcm_hw_params *params) 421 { 422 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 423 struct snd_soc_dai d; 424 struct snd_soc_dai *dai; 425 struct snd_soc_dai *cpu_dai; 426 unsigned int symmetry, i; 427 428 d.name = __func__; 429 soc_pcm_set_dai_params(&d, params); 430 431 #define __soc_pcm_params_symmetry(xxx) \ 432 symmetry = rtd->dai_link->symmetric_##xxx; \ 433 for_each_rtd_dais(rtd, i, dai) \ 434 symmetry |= dai->driver->symmetric_##xxx; \ 435 \ 436 if (symmetry) \ 437 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 438 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 439 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 440 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 441 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 442 return -EINVAL; \ 443 } 444 445 /* reject unmatched parameters when applying symmetry */ 446 __soc_pcm_params_symmetry(rate); 447 __soc_pcm_params_symmetry(channels); 448 __soc_pcm_params_symmetry(sample_bits); 449 450 return 0; 451 } 452 453 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 454 { 455 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 456 struct snd_soc_dai_link *link = rtd->dai_link; 457 struct snd_soc_dai *dai; 458 unsigned int symmetry, i; 459 460 symmetry = link->symmetric_rate || 461 link->symmetric_channels || 462 link->symmetric_sample_bits; 463 464 for_each_rtd_dais(rtd, i, dai) 465 symmetry = symmetry || 466 dai->driver->symmetric_rate || 467 dai->driver->symmetric_channels || 468 dai->driver->symmetric_sample_bits; 469 470 if (symmetry) 471 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 472 } 473 474 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 475 { 476 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 477 int ret; 478 479 if (!bits) 480 return; 481 482 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 483 if (ret != 0) 484 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 485 bits, ret); 486 } 487 488 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 489 { 490 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 491 struct snd_soc_dai *cpu_dai; 492 struct snd_soc_dai *codec_dai; 493 int stream = substream->stream; 494 int i; 495 unsigned int bits = 0, cpu_bits = 0; 496 497 for_each_rtd_codec_dais(rtd, i, codec_dai) { 498 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 499 500 if (pcm_codec->sig_bits == 0) { 501 bits = 0; 502 break; 503 } 504 bits = max(pcm_codec->sig_bits, bits); 505 } 506 507 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 508 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 509 510 if (pcm_cpu->sig_bits == 0) { 511 cpu_bits = 0; 512 break; 513 } 514 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 515 } 516 517 soc_pcm_set_msb(substream, bits); 518 soc_pcm_set_msb(substream, cpu_bits); 519 } 520 521 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 522 { 523 hw->rates = UINT_MAX; 524 hw->rate_min = 0; 525 hw->rate_max = UINT_MAX; 526 hw->channels_min = 0; 527 hw->channels_max = UINT_MAX; 528 hw->formats = ULLONG_MAX; 529 } 530 531 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 532 struct snd_soc_pcm_stream *p) 533 { 534 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 535 536 /* setup hw->rate_min/max via hw->rates first */ 537 snd_pcm_hw_limit_rates(hw); 538 539 /* update hw->rate_min/max by snd_soc_pcm_stream */ 540 hw->rate_min = max(hw->rate_min, p->rate_min); 541 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 542 } 543 544 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 545 struct snd_soc_pcm_stream *p) 546 { 547 hw->channels_min = max(hw->channels_min, p->channels_min); 548 hw->channels_max = min(hw->channels_max, p->channels_max); 549 } 550 551 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 552 struct snd_soc_pcm_stream *p) 553 { 554 hw->formats &= p->formats; 555 } 556 557 /** 558 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 559 * @rtd: ASoC PCM runtime 560 * @hw: PCM hardware parameters (output) 561 * @stream: Direction of the PCM stream 562 * 563 * Calculates the subset of stream parameters supported by all DAIs 564 * associated with the PCM stream. 565 */ 566 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 567 struct snd_pcm_hardware *hw, int stream) 568 { 569 struct snd_soc_dai *codec_dai; 570 struct snd_soc_dai *cpu_dai; 571 struct snd_soc_pcm_stream *codec_stream; 572 struct snd_soc_pcm_stream *cpu_stream; 573 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 574 int i; 575 576 soc_pcm_hw_init(hw); 577 578 /* first calculate min/max only for CPUs in the DAI link */ 579 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 580 581 /* 582 * Skip CPUs which don't support the current stream type. 583 * Otherwise, since the rate, channel, and format values will 584 * zero in that case, we would have no usable settings left, 585 * causing the resulting setup to fail. 586 */ 587 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 588 continue; 589 590 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 591 592 soc_pcm_hw_update_chan(hw, cpu_stream); 593 soc_pcm_hw_update_rate(hw, cpu_stream); 594 soc_pcm_hw_update_format(hw, cpu_stream); 595 } 596 cpu_chan_min = hw->channels_min; 597 cpu_chan_max = hw->channels_max; 598 599 /* second calculate min/max only for CODECs in the DAI link */ 600 for_each_rtd_codec_dais(rtd, i, codec_dai) { 601 602 /* 603 * Skip CODECs which don't support the current stream type. 604 * Otherwise, since the rate, channel, and format values will 605 * zero in that case, we would have no usable settings left, 606 * causing the resulting setup to fail. 607 */ 608 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 609 continue; 610 611 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 612 613 soc_pcm_hw_update_chan(hw, codec_stream); 614 soc_pcm_hw_update_rate(hw, codec_stream); 615 soc_pcm_hw_update_format(hw, codec_stream); 616 } 617 618 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 619 if (!hw->channels_min) 620 return -EINVAL; 621 622 /* 623 * chan min/max cannot be enforced if there are multiple CODEC DAIs 624 * connected to CPU DAI(s), use CPU DAI's directly and let 625 * channel allocation be fixed up later 626 */ 627 if (rtd->dai_link->num_codecs > 1) { 628 hw->channels_min = cpu_chan_min; 629 hw->channels_max = cpu_chan_max; 630 } 631 632 return 0; 633 } 634 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 635 636 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 637 { 638 struct snd_pcm_hardware *hw = &substream->runtime->hw; 639 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 640 u64 formats = hw->formats; 641 642 /* 643 * At least one CPU and one CODEC should match. Otherwise, we should 644 * have bailed out on a higher level, since there would be no CPU or 645 * CODEC to support the transfer direction in that case. 646 */ 647 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 648 649 if (formats) 650 hw->formats &= formats; 651 } 652 653 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 654 { 655 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 656 struct snd_soc_component *component; 657 int i, ret = 0; 658 659 for_each_rtd_components(rtd, i, component) { 660 ret = snd_soc_component_module_get_when_open(component, substream); 661 if (ret < 0) 662 break; 663 664 ret = snd_soc_component_open(component, substream); 665 if (ret < 0) 666 break; 667 } 668 669 return ret; 670 } 671 672 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 673 int rollback) 674 { 675 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 676 struct snd_soc_component *component; 677 int i, ret = 0; 678 679 for_each_rtd_components(rtd, i, component) { 680 int r = snd_soc_component_close(component, substream, rollback); 681 if (r < 0) 682 ret = r; /* use last ret */ 683 684 snd_soc_component_module_put_when_close(component, substream, rollback); 685 } 686 687 return ret; 688 } 689 690 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 691 struct snd_pcm_substream *substream, int rollback) 692 { 693 struct snd_soc_component *component; 694 struct snd_soc_dai *dai; 695 int i; 696 697 snd_soc_dpcm_mutex_assert_held(rtd); 698 699 if (!rollback) { 700 snd_soc_runtime_deactivate(rtd, substream->stream); 701 702 /* Make sure DAI parameters cleared if the DAI becomes inactive */ 703 for_each_rtd_dais(rtd, i, dai) 704 if (snd_soc_dai_active(dai) == 0 && 705 (dai->rate || dai->channels || dai->sample_bits)) 706 soc_pcm_set_dai_params(dai, NULL); 707 } 708 709 for_each_rtd_dais(rtd, i, dai) 710 snd_soc_dai_shutdown(dai, substream, rollback); 711 712 snd_soc_link_shutdown(substream, rollback); 713 714 soc_pcm_components_close(substream, rollback); 715 716 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 717 718 for_each_rtd_components(rtd, i, component) 719 if (!snd_soc_component_active(component)) 720 pinctrl_pm_select_sleep_state(component->dev); 721 722 return 0; 723 } 724 725 /* 726 * Called by ALSA when a PCM substream is closed. Private data can be 727 * freed here. The cpu DAI, codec DAI, machine and components are also 728 * shutdown. 729 */ 730 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 731 struct snd_pcm_substream *substream) 732 { 733 return soc_pcm_clean(rtd, substream, 0); 734 } 735 736 /* PCM close ops for non-DPCM streams */ 737 static int soc_pcm_close(struct snd_pcm_substream *substream) 738 { 739 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 740 741 snd_soc_dpcm_mutex_lock(rtd); 742 __soc_pcm_close(rtd, substream); 743 snd_soc_dpcm_mutex_unlock(rtd); 744 return 0; 745 } 746 747 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 748 { 749 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 750 struct snd_pcm_hardware *hw = &substream->runtime->hw; 751 const char *name_cpu = soc_cpu_dai_name(rtd); 752 const char *name_codec = soc_codec_dai_name(rtd); 753 const char *err_msg; 754 struct device *dev = rtd->dev; 755 756 err_msg = "rates"; 757 if (!hw->rates) 758 goto config_err; 759 760 err_msg = "formats"; 761 if (!hw->formats) 762 goto config_err; 763 764 err_msg = "channels"; 765 if (!hw->channels_min || !hw->channels_max || 766 hw->channels_min > hw->channels_max) 767 goto config_err; 768 769 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 770 name_cpu); 771 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 772 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 773 hw->channels_max); 774 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 775 hw->rate_max); 776 777 return 0; 778 779 config_err: 780 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 781 name_codec, name_cpu, err_msg); 782 return -EINVAL; 783 } 784 785 /* 786 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 787 * then initialized and any private data can be allocated. This also calls 788 * startup for the cpu DAI, component, machine and codec DAI. 789 */ 790 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 791 struct snd_pcm_substream *substream) 792 { 793 struct snd_soc_component *component; 794 struct snd_soc_dai *dai; 795 int i, ret = 0; 796 797 snd_soc_dpcm_mutex_assert_held(rtd); 798 799 for_each_rtd_components(rtd, i, component) 800 pinctrl_pm_select_default_state(component->dev); 801 802 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 803 if (ret < 0) 804 goto err; 805 806 ret = soc_pcm_components_open(substream); 807 if (ret < 0) 808 goto err; 809 810 ret = snd_soc_link_startup(substream); 811 if (ret < 0) 812 goto err; 813 814 /* startup the audio subsystem */ 815 for_each_rtd_dais(rtd, i, dai) { 816 ret = snd_soc_dai_startup(dai, substream); 817 if (ret < 0) 818 goto err; 819 } 820 821 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 822 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 823 goto dynamic; 824 825 /* Check that the codec and cpu DAIs are compatible */ 826 soc_pcm_init_runtime_hw(substream); 827 828 soc_pcm_update_symmetry(substream); 829 830 ret = soc_hw_sanity_check(substream); 831 if (ret < 0) 832 goto err; 833 834 soc_pcm_apply_msb(substream); 835 836 /* Symmetry only applies if we've already got an active stream. */ 837 for_each_rtd_dais(rtd, i, dai) { 838 ret = soc_pcm_apply_symmetry(substream, dai); 839 if (ret != 0) 840 goto err; 841 } 842 dynamic: 843 snd_soc_runtime_activate(rtd, substream->stream); 844 ret = 0; 845 err: 846 if (ret < 0) 847 soc_pcm_clean(rtd, substream, 1); 848 849 return soc_pcm_ret(rtd, ret); 850 } 851 852 /* PCM open ops for non-DPCM streams */ 853 static int soc_pcm_open(struct snd_pcm_substream *substream) 854 { 855 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 856 int ret; 857 858 snd_soc_dpcm_mutex_lock(rtd); 859 ret = __soc_pcm_open(rtd, substream); 860 snd_soc_dpcm_mutex_unlock(rtd); 861 return ret; 862 } 863 864 /* 865 * Called by ALSA when the PCM substream is prepared, can set format, sample 866 * rate, etc. This function is non atomic and can be called multiple times, 867 * it can refer to the runtime info. 868 */ 869 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 870 struct snd_pcm_substream *substream) 871 { 872 struct snd_soc_dai *dai; 873 int i, ret = 0; 874 875 snd_soc_dpcm_mutex_assert_held(rtd); 876 877 ret = snd_soc_link_prepare(substream); 878 if (ret < 0) 879 goto out; 880 881 ret = snd_soc_pcm_component_prepare(substream); 882 if (ret < 0) 883 goto out; 884 885 ret = snd_soc_pcm_dai_prepare(substream); 886 if (ret < 0) 887 goto out; 888 889 /* cancel any delayed stream shutdown that is pending */ 890 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 891 rtd->pop_wait) { 892 rtd->pop_wait = 0; 893 cancel_delayed_work(&rtd->delayed_work); 894 } 895 896 snd_soc_dapm_stream_event(rtd, substream->stream, 897 SND_SOC_DAPM_STREAM_START); 898 899 for_each_rtd_dais(rtd, i, dai) 900 snd_soc_dai_digital_mute(dai, 0, substream->stream); 901 902 out: 903 return soc_pcm_ret(rtd, ret); 904 } 905 906 /* PCM prepare ops for non-DPCM streams */ 907 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 908 { 909 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 910 int ret; 911 912 snd_soc_dpcm_mutex_lock(rtd); 913 ret = __soc_pcm_prepare(rtd, substream); 914 snd_soc_dpcm_mutex_unlock(rtd); 915 return ret; 916 } 917 918 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 919 unsigned int mask) 920 { 921 struct snd_interval *interval; 922 int channels = hweight_long(mask); 923 924 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 925 interval->min = channels; 926 interval->max = channels; 927 } 928 929 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 930 struct snd_pcm_substream *substream, int rollback) 931 { 932 struct snd_soc_dai *dai; 933 int i; 934 935 snd_soc_dpcm_mutex_assert_held(rtd); 936 937 /* clear the corresponding DAIs parameters when going to be inactive */ 938 for_each_rtd_dais(rtd, i, dai) { 939 if (snd_soc_dai_active(dai) == 1) 940 soc_pcm_set_dai_params(dai, NULL); 941 942 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) 943 snd_soc_dai_digital_mute(dai, 1, substream->stream); 944 } 945 946 /* run the stream event */ 947 snd_soc_dapm_stream_stop(rtd, substream->stream); 948 949 /* free any machine hw params */ 950 snd_soc_link_hw_free(substream, rollback); 951 952 /* free any component resources */ 953 snd_soc_pcm_component_hw_free(substream, rollback); 954 955 /* now free hw params for the DAIs */ 956 for_each_rtd_dais(rtd, i, dai) 957 if (snd_soc_dai_stream_valid(dai, substream->stream)) 958 snd_soc_dai_hw_free(dai, substream, rollback); 959 960 return 0; 961 } 962 963 /* 964 * Frees resources allocated by hw_params, can be called multiple times 965 */ 966 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 967 struct snd_pcm_substream *substream) 968 { 969 return soc_pcm_hw_clean(rtd, substream, 0); 970 } 971 972 /* hw_free PCM ops for non-DPCM streams */ 973 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 974 { 975 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 976 int ret; 977 978 snd_soc_dpcm_mutex_lock(rtd); 979 ret = __soc_pcm_hw_free(rtd, substream); 980 snd_soc_dpcm_mutex_unlock(rtd); 981 return ret; 982 } 983 984 /* 985 * Called by ALSA when the hardware params are set by application. This 986 * function can also be called multiple times and can allocate buffers 987 * (using snd_pcm_lib_* ). It's non-atomic. 988 */ 989 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, 990 struct snd_pcm_substream *substream, 991 struct snd_pcm_hw_params *params) 992 { 993 struct snd_soc_dai *cpu_dai; 994 struct snd_soc_dai *codec_dai; 995 struct snd_pcm_hw_params tmp_params; 996 int i, ret = 0; 997 998 snd_soc_dpcm_mutex_assert_held(rtd); 999 1000 ret = soc_pcm_params_symmetry(substream, params); 1001 if (ret) 1002 goto out; 1003 1004 ret = snd_soc_link_hw_params(substream, params); 1005 if (ret < 0) 1006 goto out; 1007 1008 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1009 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); 1010 1011 /* 1012 * Skip CODECs which don't support the current stream type, 1013 * the idea being that if a CODEC is not used for the currently 1014 * set up transfer direction, it should not need to be 1015 * configured, especially since the configuration used might 1016 * not even be supported by that CODEC. There may be cases 1017 * however where a CODEC needs to be set up although it is 1018 * actually not being used for the transfer, e.g. if a 1019 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1020 * for the DAI link including a playback-only CODEC. 1021 * If this becomes necessary, we will have to augment the 1022 * machine driver setup with information on how to act, so 1023 * we can do the right thing here. 1024 */ 1025 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1026 continue; 1027 1028 /* copy params for each codec */ 1029 tmp_params = *params; 1030 1031 /* fixup params based on TDM slot masks */ 1032 if (tdm_mask) 1033 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask); 1034 1035 ret = snd_soc_dai_hw_params(codec_dai, substream, 1036 &tmp_params); 1037 if(ret < 0) 1038 goto out; 1039 1040 soc_pcm_set_dai_params(codec_dai, &tmp_params); 1041 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai); 1042 } 1043 1044 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1045 unsigned int ch_mask = 0; 1046 int j; 1047 1048 /* 1049 * Skip CPUs which don't support the current stream 1050 * type. See soc_pcm_init_runtime_hw() for more details 1051 */ 1052 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1053 continue; 1054 1055 /* copy params for each cpu */ 1056 tmp_params = *params; 1057 1058 if (!rtd->dai_link->codec_ch_maps) 1059 goto hw_params; 1060 /* 1061 * construct cpu channel mask by combining ch_mask of each 1062 * codec which maps to the cpu. 1063 */ 1064 for_each_rtd_codec_dais(rtd, j, codec_dai) { 1065 if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i) 1066 ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask; 1067 } 1068 1069 /* fixup cpu channel number */ 1070 if (ch_mask) 1071 soc_pcm_codec_params_fixup(&tmp_params, ch_mask); 1072 1073 hw_params: 1074 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params); 1075 if (ret < 0) 1076 goto out; 1077 1078 /* store the parameters for each DAI */ 1079 soc_pcm_set_dai_params(cpu_dai, &tmp_params); 1080 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai); 1081 } 1082 1083 ret = snd_soc_pcm_component_hw_params(substream, params); 1084 out: 1085 if (ret < 0) 1086 soc_pcm_hw_clean(rtd, substream, 1); 1087 1088 return soc_pcm_ret(rtd, ret); 1089 } 1090 1091 /* hw_params PCM ops for non-DPCM streams */ 1092 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1093 struct snd_pcm_hw_params *params) 1094 { 1095 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1096 int ret; 1097 1098 snd_soc_dpcm_mutex_lock(rtd); 1099 ret = __soc_pcm_hw_params(rtd, substream, params); 1100 snd_soc_dpcm_mutex_unlock(rtd); 1101 return ret; 1102 } 1103 1104 #define TRIGGER_MAX 3 1105 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = { 1106 [SND_SOC_TRIGGER_ORDER_DEFAULT] = { 1107 snd_soc_link_trigger, 1108 snd_soc_pcm_component_trigger, 1109 snd_soc_pcm_dai_trigger, 1110 }, 1111 [SND_SOC_TRIGGER_ORDER_LDC] = { 1112 snd_soc_link_trigger, 1113 snd_soc_pcm_dai_trigger, 1114 snd_soc_pcm_component_trigger, 1115 }, 1116 }; 1117 1118 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1119 { 1120 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1121 struct snd_soc_component *component; 1122 int ret = 0, r = 0, i; 1123 int rollback = 0; 1124 int start = 0, stop = 0; 1125 1126 /* 1127 * select START/STOP sequence 1128 */ 1129 for_each_rtd_components(rtd, i, component) { 1130 if (component->driver->trigger_start) 1131 start = component->driver->trigger_start; 1132 if (component->driver->trigger_stop) 1133 stop = component->driver->trigger_stop; 1134 } 1135 if (rtd->dai_link->trigger_start) 1136 start = rtd->dai_link->trigger_start; 1137 if (rtd->dai_link->trigger_stop) 1138 stop = rtd->dai_link->trigger_stop; 1139 1140 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX || 1141 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX) 1142 return -EINVAL; 1143 1144 /* 1145 * START 1146 */ 1147 switch (cmd) { 1148 case SNDRV_PCM_TRIGGER_START: 1149 case SNDRV_PCM_TRIGGER_RESUME: 1150 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1151 for (i = 0; i < TRIGGER_MAX; i++) { 1152 r = trigger[start][i](substream, cmd, 0); 1153 if (r < 0) 1154 break; 1155 } 1156 } 1157 1158 /* 1159 * Rollback if START failed 1160 * find correspond STOP command 1161 */ 1162 if (r < 0) { 1163 rollback = 1; 1164 ret = r; 1165 switch (cmd) { 1166 case SNDRV_PCM_TRIGGER_START: 1167 cmd = SNDRV_PCM_TRIGGER_STOP; 1168 break; 1169 case SNDRV_PCM_TRIGGER_RESUME: 1170 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1171 break; 1172 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1173 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1174 break; 1175 } 1176 } 1177 1178 /* 1179 * STOP 1180 */ 1181 switch (cmd) { 1182 case SNDRV_PCM_TRIGGER_STOP: 1183 case SNDRV_PCM_TRIGGER_SUSPEND: 1184 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1185 for (i = TRIGGER_MAX; i > 0; i--) { 1186 r = trigger[stop][i - 1](substream, cmd, rollback); 1187 if (r < 0) 1188 ret = r; 1189 } 1190 } 1191 1192 return ret; 1193 } 1194 1195 /* 1196 * soc level wrapper for pointer callback 1197 * If cpu_dai, codec_dai, component driver has the delay callback, then 1198 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1199 */ 1200 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1201 { 1202 struct snd_pcm_runtime *runtime = substream->runtime; 1203 snd_pcm_uframes_t offset = 0; 1204 snd_pcm_sframes_t codec_delay = 0; 1205 snd_pcm_sframes_t cpu_delay = 0; 1206 1207 offset = snd_soc_pcm_component_pointer(substream); 1208 1209 /* should be called *after* snd_soc_pcm_component_pointer() */ 1210 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1211 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1212 1213 runtime->delay = cpu_delay + codec_delay; 1214 1215 return offset; 1216 } 1217 1218 /* connect a FE and BE */ 1219 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1220 struct snd_soc_pcm_runtime *be, int stream) 1221 { 1222 struct snd_pcm_substream *fe_substream; 1223 struct snd_pcm_substream *be_substream; 1224 struct snd_soc_dpcm *dpcm; 1225 1226 snd_soc_dpcm_mutex_assert_held(fe); 1227 1228 /* only add new dpcms */ 1229 for_each_dpcm_be(fe, stream, dpcm) { 1230 if (dpcm->be == be && dpcm->fe == fe) 1231 return 0; 1232 } 1233 1234 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1235 be_substream = snd_soc_dpcm_get_substream(be, stream); 1236 1237 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { 1238 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", 1239 __func__); 1240 return -EINVAL; 1241 } 1242 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1243 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1244 be_substream->pcm->nonatomic = 1; 1245 } 1246 1247 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1248 if (!dpcm) 1249 return -ENOMEM; 1250 1251 dpcm->be = be; 1252 dpcm->fe = fe; 1253 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1254 snd_soc_dpcm_stream_lock_irq(fe, stream); 1255 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1256 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1257 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1258 1259 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1260 stream ? "capture" : "playback", fe->dai_link->name, 1261 stream ? "<-" : "->", be->dai_link->name); 1262 1263 dpcm_create_debugfs_state(dpcm, stream); 1264 1265 return 1; 1266 } 1267 1268 /* reparent a BE onto another FE */ 1269 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1270 struct snd_soc_pcm_runtime *be, int stream) 1271 { 1272 struct snd_soc_dpcm *dpcm; 1273 struct snd_pcm_substream *fe_substream, *be_substream; 1274 1275 /* reparent if BE is connected to other FEs */ 1276 if (!be->dpcm[stream].users) 1277 return; 1278 1279 be_substream = snd_soc_dpcm_get_substream(be, stream); 1280 if (!be_substream) 1281 return; 1282 1283 for_each_dpcm_fe(be, stream, dpcm) { 1284 if (dpcm->fe == fe) 1285 continue; 1286 1287 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1288 stream ? "capture" : "playback", 1289 dpcm->fe->dai_link->name, 1290 stream ? "<-" : "->", dpcm->be->dai_link->name); 1291 1292 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1293 be_substream->runtime = fe_substream->runtime; 1294 break; 1295 } 1296 } 1297 1298 /* disconnect a BE and FE */ 1299 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1300 { 1301 struct snd_soc_dpcm *dpcm, *d; 1302 LIST_HEAD(deleted_dpcms); 1303 1304 snd_soc_dpcm_mutex_assert_held(fe); 1305 1306 snd_soc_dpcm_stream_lock_irq(fe, stream); 1307 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1308 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1309 stream ? "capture" : "playback", 1310 dpcm->be->dai_link->name); 1311 1312 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1313 continue; 1314 1315 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1316 stream ? "capture" : "playback", fe->dai_link->name, 1317 stream ? "<-" : "->", dpcm->be->dai_link->name); 1318 1319 /* BEs still alive need new FE */ 1320 dpcm_be_reparent(fe, dpcm->be, stream); 1321 1322 list_del(&dpcm->list_be); 1323 list_move(&dpcm->list_fe, &deleted_dpcms); 1324 } 1325 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1326 1327 while (!list_empty(&deleted_dpcms)) { 1328 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1329 list_fe); 1330 list_del(&dpcm->list_fe); 1331 dpcm_remove_debugfs_state(dpcm); 1332 kfree(dpcm); 1333 } 1334 } 1335 1336 /* get BE for DAI widget and stream */ 1337 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1338 struct snd_soc_dapm_widget *widget, int stream) 1339 { 1340 struct snd_soc_pcm_runtime *be; 1341 struct snd_soc_dapm_widget *w; 1342 struct snd_soc_dai *dai; 1343 int i; 1344 1345 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1346 1347 for_each_card_rtds(card, be) { 1348 1349 if (!be->dai_link->no_pcm) 1350 continue; 1351 1352 if (!snd_soc_dpcm_get_substream(be, stream)) 1353 continue; 1354 1355 for_each_rtd_dais(be, i, dai) { 1356 w = snd_soc_dai_get_widget(dai, stream); 1357 1358 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1359 w ? w->name : "(not set)"); 1360 1361 if (w == widget) 1362 return be; 1363 } 1364 } 1365 1366 /* Widget provided is not a BE */ 1367 return NULL; 1368 } 1369 1370 int widget_in_list(struct snd_soc_dapm_widget_list *list, 1371 struct snd_soc_dapm_widget *widget) 1372 { 1373 struct snd_soc_dapm_widget *w; 1374 int i; 1375 1376 for_each_dapm_widgets(list, i, w) 1377 if (widget == w) 1378 return 1; 1379 1380 return 0; 1381 } 1382 EXPORT_SYMBOL_GPL(widget_in_list); 1383 1384 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1385 { 1386 struct snd_soc_card *card = widget->dapm->card; 1387 struct snd_soc_pcm_runtime *rtd; 1388 int stream; 1389 1390 /* adjust dir to stream */ 1391 if (dir == SND_SOC_DAPM_DIR_OUT) 1392 stream = SNDRV_PCM_STREAM_PLAYBACK; 1393 else 1394 stream = SNDRV_PCM_STREAM_CAPTURE; 1395 1396 rtd = dpcm_get_be(card, widget, stream); 1397 if (rtd) 1398 return true; 1399 1400 return false; 1401 } 1402 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1403 1404 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1405 int stream, struct snd_soc_dapm_widget_list **list) 1406 { 1407 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1408 int paths; 1409 1410 if (fe->dai_link->num_cpus > 1) { 1411 dev_err(fe->dev, 1412 "%s doesn't support Multi CPU yet\n", __func__); 1413 return -EINVAL; 1414 } 1415 1416 /* get number of valid DAI paths and their widgets */ 1417 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1418 fe->card->component_chaining ? 1419 NULL : dpcm_end_walk_at_be); 1420 1421 if (paths > 0) 1422 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1423 stream ? "capture" : "playback"); 1424 else if (paths == 0) 1425 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1426 stream ? "capture" : "playback"); 1427 1428 return paths; 1429 } 1430 1431 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1432 { 1433 snd_soc_dapm_dai_free_widgets(list); 1434 } 1435 1436 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1437 struct snd_soc_dapm_widget_list *list) 1438 { 1439 struct snd_soc_dai *dai; 1440 unsigned int i; 1441 1442 /* is there a valid DAI widget for this BE */ 1443 for_each_rtd_dais(dpcm->be, i, dai) { 1444 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1445 1446 /* 1447 * The BE is pruned only if none of the dai 1448 * widgets are in the active list. 1449 */ 1450 if (widget && widget_in_list(list, widget)) 1451 return true; 1452 } 1453 1454 return false; 1455 } 1456 1457 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1458 struct snd_soc_dapm_widget_list **list_) 1459 { 1460 struct snd_soc_dpcm *dpcm; 1461 int prune = 0; 1462 1463 /* Destroy any old FE <--> BE connections */ 1464 for_each_dpcm_be(fe, stream, dpcm) { 1465 if (dpcm_be_is_active(dpcm, stream, *list_)) 1466 continue; 1467 1468 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1469 stream ? "capture" : "playback", 1470 dpcm->be->dai_link->name, fe->dai_link->name); 1471 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1472 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1473 prune++; 1474 } 1475 1476 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1477 return prune; 1478 } 1479 1480 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1481 struct snd_soc_dapm_widget_list **list_) 1482 { 1483 struct snd_soc_card *card = fe->card; 1484 struct snd_soc_dapm_widget_list *list = *list_; 1485 struct snd_soc_pcm_runtime *be; 1486 struct snd_soc_dapm_widget *widget; 1487 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1488 int i, new = 0, err; 1489 1490 /* don't connect if FE is not running */ 1491 if (!fe_substream->runtime && !fe->fe_compr) 1492 return new; 1493 1494 /* Create any new FE <--> BE connections */ 1495 for_each_dapm_widgets(list, i, widget) { 1496 1497 switch (widget->id) { 1498 case snd_soc_dapm_dai_in: 1499 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1500 continue; 1501 break; 1502 case snd_soc_dapm_dai_out: 1503 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1504 continue; 1505 break; 1506 default: 1507 continue; 1508 } 1509 1510 /* is there a valid BE rtd for this widget */ 1511 be = dpcm_get_be(card, widget, stream); 1512 if (!be) { 1513 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1514 widget->name); 1515 continue; 1516 } 1517 1518 /* 1519 * Filter for systems with 'component_chaining' enabled. 1520 * This helps to avoid unnecessary re-configuration of an 1521 * already active BE on such systems. 1522 */ 1523 if (fe->card->component_chaining && 1524 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1525 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1526 continue; 1527 1528 /* newly connected FE and BE */ 1529 err = dpcm_be_connect(fe, be, stream); 1530 if (err < 0) { 1531 dev_err(fe->dev, "ASoC: can't connect %s\n", 1532 widget->name); 1533 break; 1534 } else if (err == 0) /* already connected */ 1535 continue; 1536 1537 /* new */ 1538 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1539 new++; 1540 } 1541 1542 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1543 return new; 1544 } 1545 1546 /* 1547 * Find the corresponding BE DAIs that source or sink audio to this 1548 * FE substream. 1549 */ 1550 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1551 int stream, struct snd_soc_dapm_widget_list **list, int new) 1552 { 1553 if (new) 1554 return dpcm_add_paths(fe, stream, list); 1555 else 1556 return dpcm_prune_paths(fe, stream, list); 1557 } 1558 1559 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1560 { 1561 struct snd_soc_dpcm *dpcm; 1562 1563 for_each_dpcm_be(fe, stream, dpcm) 1564 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1565 } 1566 1567 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1568 int do_hw_free, struct snd_soc_dpcm *last) 1569 { 1570 struct snd_soc_dpcm *dpcm; 1571 1572 /* disable any enabled and non active backends */ 1573 for_each_dpcm_be(fe, stream, dpcm) { 1574 struct snd_soc_pcm_runtime *be = dpcm->be; 1575 struct snd_pcm_substream *be_substream = 1576 snd_soc_dpcm_get_substream(be, stream); 1577 1578 if (dpcm == last) 1579 return; 1580 1581 /* is this op for this BE ? */ 1582 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1583 continue; 1584 1585 if (be->dpcm[stream].users == 0) { 1586 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1587 stream ? "capture" : "playback", 1588 be->dpcm[stream].state); 1589 continue; 1590 } 1591 1592 if (--be->dpcm[stream].users != 0) 1593 continue; 1594 1595 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1596 if (!do_hw_free) 1597 continue; 1598 1599 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1600 __soc_pcm_hw_free(be, be_substream); 1601 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1602 } 1603 } 1604 1605 __soc_pcm_close(be, be_substream); 1606 be_substream->runtime = NULL; 1607 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1608 } 1609 } 1610 1611 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1612 { 1613 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1614 struct snd_soc_pcm_runtime *be; 1615 struct snd_soc_dpcm *dpcm; 1616 int err, count = 0; 1617 1618 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1619 for_each_dpcm_be(fe, stream, dpcm) { 1620 struct snd_pcm_substream *be_substream; 1621 1622 be = dpcm->be; 1623 be_substream = snd_soc_dpcm_get_substream(be, stream); 1624 1625 if (!be_substream) { 1626 dev_err(be->dev, "ASoC: no backend %s stream\n", 1627 stream ? "capture" : "playback"); 1628 continue; 1629 } 1630 1631 /* is this op for this BE ? */ 1632 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1633 continue; 1634 1635 /* first time the dpcm is open ? */ 1636 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1637 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1638 stream ? "capture" : "playback", 1639 be->dpcm[stream].state); 1640 continue; 1641 } 1642 1643 if (be->dpcm[stream].users++ != 0) 1644 continue; 1645 1646 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1647 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1648 continue; 1649 1650 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1651 stream ? "capture" : "playback", be->dai_link->name); 1652 1653 be_substream->runtime = fe_substream->runtime; 1654 err = __soc_pcm_open(be, be_substream); 1655 if (err < 0) { 1656 be->dpcm[stream].users--; 1657 if (be->dpcm[stream].users < 0) 1658 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1659 stream ? "capture" : "playback", 1660 be->dpcm[stream].state); 1661 1662 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1663 goto unwind; 1664 } 1665 be->dpcm[stream].be_start = 0; 1666 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1667 count++; 1668 } 1669 1670 return count; 1671 1672 unwind: 1673 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1674 1675 return soc_pcm_ret(fe, err); 1676 } 1677 1678 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1679 { 1680 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1681 struct snd_pcm_runtime *runtime = substream->runtime; 1682 struct snd_pcm_hardware *hw = &runtime->hw; 1683 struct snd_soc_dai *dai; 1684 int stream = substream->stream; 1685 u64 formats = hw->formats; 1686 int i; 1687 1688 soc_pcm_hw_init(hw); 1689 1690 if (formats) 1691 hw->formats &= formats; 1692 1693 for_each_rtd_cpu_dais(fe, i, dai) { 1694 struct snd_soc_pcm_stream *cpu_stream; 1695 1696 /* 1697 * Skip CPUs which don't support the current stream 1698 * type. See soc_pcm_init_runtime_hw() for more details 1699 */ 1700 if (!snd_soc_dai_stream_valid(dai, stream)) 1701 continue; 1702 1703 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1704 1705 soc_pcm_hw_update_rate(hw, cpu_stream); 1706 soc_pcm_hw_update_chan(hw, cpu_stream); 1707 soc_pcm_hw_update_format(hw, cpu_stream); 1708 } 1709 1710 } 1711 1712 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1713 { 1714 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1715 struct snd_pcm_runtime *runtime = substream->runtime; 1716 struct snd_pcm_hardware *hw = &runtime->hw; 1717 struct snd_soc_dpcm *dpcm; 1718 struct snd_soc_dai *dai; 1719 int stream = substream->stream; 1720 1721 if (!fe->dai_link->dpcm_merged_format) 1722 return; 1723 1724 /* 1725 * It returns merged BE codec format 1726 * if FE want to use it (= dpcm_merged_format) 1727 */ 1728 1729 for_each_dpcm_be(fe, stream, dpcm) { 1730 struct snd_soc_pcm_runtime *be = dpcm->be; 1731 struct snd_soc_pcm_stream *codec_stream; 1732 int i; 1733 1734 for_each_rtd_codec_dais(be, i, dai) { 1735 /* 1736 * Skip CODECs which don't support the current stream 1737 * type. See soc_pcm_init_runtime_hw() for more details 1738 */ 1739 if (!snd_soc_dai_stream_valid(dai, stream)) 1740 continue; 1741 1742 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1743 1744 soc_pcm_hw_update_format(hw, codec_stream); 1745 } 1746 } 1747 } 1748 1749 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1750 { 1751 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1752 struct snd_pcm_runtime *runtime = substream->runtime; 1753 struct snd_pcm_hardware *hw = &runtime->hw; 1754 struct snd_soc_dpcm *dpcm; 1755 int stream = substream->stream; 1756 1757 if (!fe->dai_link->dpcm_merged_chan) 1758 return; 1759 1760 /* 1761 * It returns merged BE codec channel; 1762 * if FE want to use it (= dpcm_merged_chan) 1763 */ 1764 1765 for_each_dpcm_be(fe, stream, dpcm) { 1766 struct snd_soc_pcm_runtime *be = dpcm->be; 1767 struct snd_soc_pcm_stream *cpu_stream; 1768 struct snd_soc_dai *dai; 1769 int i; 1770 1771 for_each_rtd_cpu_dais(be, i, dai) { 1772 /* 1773 * Skip CPUs which don't support the current stream 1774 * type. See soc_pcm_init_runtime_hw() for more details 1775 */ 1776 if (!snd_soc_dai_stream_valid(dai, stream)) 1777 continue; 1778 1779 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1780 1781 soc_pcm_hw_update_chan(hw, cpu_stream); 1782 } 1783 1784 /* 1785 * chan min/max cannot be enforced if there are multiple CODEC 1786 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1787 */ 1788 if (be->dai_link->num_codecs == 1) { 1789 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1790 asoc_rtd_to_codec(be, 0), stream); 1791 1792 soc_pcm_hw_update_chan(hw, codec_stream); 1793 } 1794 } 1795 } 1796 1797 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1798 { 1799 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1800 struct snd_pcm_runtime *runtime = substream->runtime; 1801 struct snd_pcm_hardware *hw = &runtime->hw; 1802 struct snd_soc_dpcm *dpcm; 1803 int stream = substream->stream; 1804 1805 if (!fe->dai_link->dpcm_merged_rate) 1806 return; 1807 1808 /* 1809 * It returns merged BE codec channel; 1810 * if FE want to use it (= dpcm_merged_chan) 1811 */ 1812 1813 for_each_dpcm_be(fe, stream, dpcm) { 1814 struct snd_soc_pcm_runtime *be = dpcm->be; 1815 struct snd_soc_pcm_stream *pcm; 1816 struct snd_soc_dai *dai; 1817 int i; 1818 1819 for_each_rtd_dais(be, i, dai) { 1820 /* 1821 * Skip DAIs which don't support the current stream 1822 * type. See soc_pcm_init_runtime_hw() for more details 1823 */ 1824 if (!snd_soc_dai_stream_valid(dai, stream)) 1825 continue; 1826 1827 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1828 1829 soc_pcm_hw_update_rate(hw, pcm); 1830 } 1831 } 1832 } 1833 1834 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1835 int stream) 1836 { 1837 struct snd_soc_dpcm *dpcm; 1838 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1839 struct snd_soc_dai *fe_cpu_dai; 1840 int err = 0; 1841 int i; 1842 1843 /* apply symmetry for FE */ 1844 soc_pcm_update_symmetry(fe_substream); 1845 1846 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1847 /* Symmetry only applies if we've got an active stream. */ 1848 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1849 if (err < 0) 1850 goto error; 1851 } 1852 1853 /* apply symmetry for BE */ 1854 for_each_dpcm_be(fe, stream, dpcm) { 1855 struct snd_soc_pcm_runtime *be = dpcm->be; 1856 struct snd_pcm_substream *be_substream = 1857 snd_soc_dpcm_get_substream(be, stream); 1858 struct snd_soc_pcm_runtime *rtd; 1859 struct snd_soc_dai *dai; 1860 1861 /* A backend may not have the requested substream */ 1862 if (!be_substream) 1863 continue; 1864 1865 rtd = asoc_substream_to_rtd(be_substream); 1866 if (rtd->dai_link->be_hw_params_fixup) 1867 continue; 1868 1869 soc_pcm_update_symmetry(be_substream); 1870 1871 /* Symmetry only applies if we've got an active stream. */ 1872 for_each_rtd_dais(rtd, i, dai) { 1873 err = soc_pcm_apply_symmetry(fe_substream, dai); 1874 if (err < 0) 1875 goto error; 1876 } 1877 } 1878 error: 1879 return soc_pcm_ret(fe, err); 1880 } 1881 1882 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1883 { 1884 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1885 int stream = fe_substream->stream, ret = 0; 1886 1887 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1888 1889 ret = dpcm_be_dai_startup(fe, stream); 1890 if (ret < 0) 1891 goto be_err; 1892 1893 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1894 1895 /* start the DAI frontend */ 1896 ret = __soc_pcm_open(fe, fe_substream); 1897 if (ret < 0) 1898 goto unwind; 1899 1900 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1901 1902 dpcm_runtime_setup_fe(fe_substream); 1903 1904 dpcm_runtime_setup_be_format(fe_substream); 1905 dpcm_runtime_setup_be_chan(fe_substream); 1906 dpcm_runtime_setup_be_rate(fe_substream); 1907 1908 ret = dpcm_apply_symmetry(fe_substream, stream); 1909 1910 unwind: 1911 if (ret < 0) 1912 dpcm_be_dai_startup_unwind(fe, stream); 1913 be_err: 1914 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1915 1916 return soc_pcm_ret(fe, ret); 1917 } 1918 1919 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1920 { 1921 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1922 int stream = substream->stream; 1923 1924 snd_soc_dpcm_mutex_assert_held(fe); 1925 1926 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1927 1928 /* shutdown the BEs */ 1929 dpcm_be_dai_shutdown(fe, stream); 1930 1931 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1932 1933 /* now shutdown the frontend */ 1934 __soc_pcm_close(fe, substream); 1935 1936 /* run the stream stop event */ 1937 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1938 1939 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1940 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1941 return 0; 1942 } 1943 1944 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1945 { 1946 struct snd_soc_dpcm *dpcm; 1947 1948 /* only hw_params backends that are either sinks or sources 1949 * to this frontend DAI */ 1950 for_each_dpcm_be(fe, stream, dpcm) { 1951 1952 struct snd_soc_pcm_runtime *be = dpcm->be; 1953 struct snd_pcm_substream *be_substream = 1954 snd_soc_dpcm_get_substream(be, stream); 1955 1956 /* is this op for this BE ? */ 1957 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1958 continue; 1959 1960 /* only free hw when no longer used - check all FEs */ 1961 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1962 continue; 1963 1964 /* do not free hw if this BE is used by other FE */ 1965 if (be->dpcm[stream].users > 1) 1966 continue; 1967 1968 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1969 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1970 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1971 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1972 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1973 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1974 continue; 1975 1976 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1977 be->dai_link->name); 1978 1979 __soc_pcm_hw_free(be, be_substream); 1980 1981 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1982 } 1983 } 1984 1985 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1986 { 1987 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1988 int stream = substream->stream; 1989 1990 snd_soc_dpcm_mutex_lock(fe); 1991 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1992 1993 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1994 1995 /* call hw_free on the frontend */ 1996 soc_pcm_hw_clean(fe, substream, 0); 1997 1998 /* only hw_params backends that are either sinks or sources 1999 * to this frontend DAI */ 2000 dpcm_be_dai_hw_free(fe, stream); 2001 2002 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2003 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2004 2005 snd_soc_dpcm_mutex_unlock(fe); 2006 return 0; 2007 } 2008 2009 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2010 { 2011 struct snd_soc_pcm_runtime *be; 2012 struct snd_pcm_substream *be_substream; 2013 struct snd_soc_dpcm *dpcm; 2014 int ret; 2015 2016 for_each_dpcm_be(fe, stream, dpcm) { 2017 struct snd_pcm_hw_params hw_params; 2018 2019 be = dpcm->be; 2020 be_substream = snd_soc_dpcm_get_substream(be, stream); 2021 2022 /* is this op for this BE ? */ 2023 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2024 continue; 2025 2026 /* copy params for each dpcm */ 2027 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 2028 sizeof(struct snd_pcm_hw_params)); 2029 2030 /* perform any hw_params fixups */ 2031 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 2032 if (ret < 0) 2033 goto unwind; 2034 2035 /* copy the fixed-up hw params for BE dai */ 2036 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2037 sizeof(struct snd_pcm_hw_params)); 2038 2039 /* only allow hw_params() if no connected FEs are running */ 2040 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2041 continue; 2042 2043 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2044 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2045 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2046 continue; 2047 2048 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2049 be->dai_link->name); 2050 2051 ret = __soc_pcm_hw_params(be, be_substream, &hw_params); 2052 if (ret < 0) 2053 goto unwind; 2054 2055 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2056 } 2057 return 0; 2058 2059 unwind: 2060 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2061 __func__, be->dai_link->name, ret); 2062 2063 /* disable any enabled and non active backends */ 2064 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2065 be = dpcm->be; 2066 be_substream = snd_soc_dpcm_get_substream(be, stream); 2067 2068 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2069 continue; 2070 2071 /* only allow hw_free() if no connected FEs are running */ 2072 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2073 continue; 2074 2075 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2076 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2077 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2078 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2079 continue; 2080 2081 __soc_pcm_hw_free(be, be_substream); 2082 } 2083 2084 return ret; 2085 } 2086 2087 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2088 struct snd_pcm_hw_params *params) 2089 { 2090 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2091 int ret, stream = substream->stream; 2092 2093 snd_soc_dpcm_mutex_lock(fe); 2094 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2095 2096 memcpy(&fe->dpcm[stream].hw_params, params, 2097 sizeof(struct snd_pcm_hw_params)); 2098 ret = dpcm_be_dai_hw_params(fe, stream); 2099 if (ret < 0) 2100 goto out; 2101 2102 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2103 fe->dai_link->name, params_rate(params), 2104 params_channels(params), params_format(params)); 2105 2106 /* call hw_params on the frontend */ 2107 ret = __soc_pcm_hw_params(fe, substream, params); 2108 if (ret < 0) 2109 dpcm_be_dai_hw_free(fe, stream); 2110 else 2111 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2112 2113 out: 2114 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2115 snd_soc_dpcm_mutex_unlock(fe); 2116 2117 return soc_pcm_ret(fe, ret); 2118 } 2119 2120 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2121 int cmd) 2122 { 2123 struct snd_soc_pcm_runtime *be; 2124 bool pause_stop_transition; 2125 struct snd_soc_dpcm *dpcm; 2126 unsigned long flags; 2127 int ret = 0; 2128 2129 for_each_dpcm_be(fe, stream, dpcm) { 2130 struct snd_pcm_substream *be_substream; 2131 2132 be = dpcm->be; 2133 be_substream = snd_soc_dpcm_get_substream(be, stream); 2134 2135 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); 2136 2137 /* is this op for this BE ? */ 2138 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2139 goto next; 2140 2141 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2142 be->dai_link->name, cmd); 2143 2144 switch (cmd) { 2145 case SNDRV_PCM_TRIGGER_START: 2146 if (!be->dpcm[stream].be_start && 2147 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2148 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2149 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2150 goto next; 2151 2152 be->dpcm[stream].be_start++; 2153 if (be->dpcm[stream].be_start != 1) 2154 goto next; 2155 2156 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2157 ret = soc_pcm_trigger(be_substream, 2158 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2159 else 2160 ret = soc_pcm_trigger(be_substream, 2161 SNDRV_PCM_TRIGGER_START); 2162 if (ret) { 2163 be->dpcm[stream].be_start--; 2164 goto next; 2165 } 2166 2167 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2168 break; 2169 case SNDRV_PCM_TRIGGER_RESUME: 2170 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2171 goto next; 2172 2173 be->dpcm[stream].be_start++; 2174 if (be->dpcm[stream].be_start != 1) 2175 goto next; 2176 2177 ret = soc_pcm_trigger(be_substream, cmd); 2178 if (ret) { 2179 be->dpcm[stream].be_start--; 2180 goto next; 2181 } 2182 2183 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2184 break; 2185 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2186 if (!be->dpcm[stream].be_start && 2187 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2188 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2189 goto next; 2190 2191 fe->dpcm[stream].fe_pause = false; 2192 be->dpcm[stream].be_pause--; 2193 2194 be->dpcm[stream].be_start++; 2195 if (be->dpcm[stream].be_start != 1) 2196 goto next; 2197 2198 ret = soc_pcm_trigger(be_substream, cmd); 2199 if (ret) { 2200 be->dpcm[stream].be_start--; 2201 goto next; 2202 } 2203 2204 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2205 break; 2206 case SNDRV_PCM_TRIGGER_STOP: 2207 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2208 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2209 goto next; 2210 2211 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2212 be->dpcm[stream].be_start--; 2213 2214 if (be->dpcm[stream].be_start != 0) 2215 goto next; 2216 2217 pause_stop_transition = false; 2218 if (fe->dpcm[stream].fe_pause) { 2219 pause_stop_transition = true; 2220 fe->dpcm[stream].fe_pause = false; 2221 be->dpcm[stream].be_pause--; 2222 } 2223 2224 if (be->dpcm[stream].be_pause != 0) 2225 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2226 else 2227 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2228 2229 if (ret) { 2230 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2231 be->dpcm[stream].be_start++; 2232 if (pause_stop_transition) { 2233 fe->dpcm[stream].fe_pause = true; 2234 be->dpcm[stream].be_pause++; 2235 } 2236 goto next; 2237 } 2238 2239 if (be->dpcm[stream].be_pause != 0) 2240 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2241 else 2242 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2243 2244 break; 2245 case SNDRV_PCM_TRIGGER_SUSPEND: 2246 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2247 goto next; 2248 2249 be->dpcm[stream].be_start--; 2250 if (be->dpcm[stream].be_start != 0) 2251 goto next; 2252 2253 ret = soc_pcm_trigger(be_substream, cmd); 2254 if (ret) { 2255 be->dpcm[stream].be_start++; 2256 goto next; 2257 } 2258 2259 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2260 break; 2261 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2262 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2263 goto next; 2264 2265 fe->dpcm[stream].fe_pause = true; 2266 be->dpcm[stream].be_pause++; 2267 2268 be->dpcm[stream].be_start--; 2269 if (be->dpcm[stream].be_start != 0) 2270 goto next; 2271 2272 ret = soc_pcm_trigger(be_substream, cmd); 2273 if (ret) { 2274 be->dpcm[stream].be_start++; 2275 goto next; 2276 } 2277 2278 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2279 break; 2280 } 2281 next: 2282 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2283 if (ret) 2284 break; 2285 } 2286 return soc_pcm_ret(fe, ret); 2287 } 2288 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2289 2290 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2291 int cmd, bool fe_first) 2292 { 2293 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2294 int ret; 2295 2296 /* call trigger on the frontend before the backend. */ 2297 if (fe_first) { 2298 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2299 fe->dai_link->name, cmd); 2300 2301 ret = soc_pcm_trigger(substream, cmd); 2302 if (ret < 0) 2303 return ret; 2304 2305 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2306 return ret; 2307 } 2308 2309 /* call trigger on the frontend after the backend. */ 2310 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2311 if (ret < 0) 2312 return ret; 2313 2314 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2315 fe->dai_link->name, cmd); 2316 2317 ret = soc_pcm_trigger(substream, cmd); 2318 2319 return ret; 2320 } 2321 2322 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2323 { 2324 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2325 int stream = substream->stream; 2326 int ret = 0; 2327 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2328 2329 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2330 2331 switch (trigger) { 2332 case SND_SOC_DPCM_TRIGGER_PRE: 2333 switch (cmd) { 2334 case SNDRV_PCM_TRIGGER_START: 2335 case SNDRV_PCM_TRIGGER_RESUME: 2336 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2337 case SNDRV_PCM_TRIGGER_DRAIN: 2338 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2339 break; 2340 case SNDRV_PCM_TRIGGER_STOP: 2341 case SNDRV_PCM_TRIGGER_SUSPEND: 2342 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2343 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2344 break; 2345 default: 2346 ret = -EINVAL; 2347 break; 2348 } 2349 break; 2350 case SND_SOC_DPCM_TRIGGER_POST: 2351 switch (cmd) { 2352 case SNDRV_PCM_TRIGGER_START: 2353 case SNDRV_PCM_TRIGGER_RESUME: 2354 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2355 case SNDRV_PCM_TRIGGER_DRAIN: 2356 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2357 break; 2358 case SNDRV_PCM_TRIGGER_STOP: 2359 case SNDRV_PCM_TRIGGER_SUSPEND: 2360 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2361 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2362 break; 2363 default: 2364 ret = -EINVAL; 2365 break; 2366 } 2367 break; 2368 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2369 /* bespoke trigger() - handles both FE and BEs */ 2370 2371 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2372 fe->dai_link->name, cmd); 2373 2374 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2375 break; 2376 default: 2377 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2378 fe->dai_link->name); 2379 ret = -EINVAL; 2380 goto out; 2381 } 2382 2383 if (ret < 0) { 2384 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2385 cmd, ret); 2386 goto out; 2387 } 2388 2389 switch (cmd) { 2390 case SNDRV_PCM_TRIGGER_START: 2391 case SNDRV_PCM_TRIGGER_RESUME: 2392 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2393 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2394 break; 2395 case SNDRV_PCM_TRIGGER_STOP: 2396 case SNDRV_PCM_TRIGGER_SUSPEND: 2397 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2398 break; 2399 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2400 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2401 break; 2402 } 2403 2404 out: 2405 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2406 return ret; 2407 } 2408 2409 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2410 { 2411 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2412 int stream = substream->stream; 2413 2414 /* if FE's runtime_update is already set, we're in race; 2415 * process this trigger later at exit 2416 */ 2417 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2418 fe->dpcm[stream].trigger_pending = cmd + 1; 2419 return 0; /* delayed, assuming it's successful */ 2420 } 2421 2422 /* we're alone, let's trigger */ 2423 return dpcm_fe_dai_do_trigger(substream, cmd); 2424 } 2425 2426 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2427 { 2428 struct snd_soc_dpcm *dpcm; 2429 int ret = 0; 2430 2431 for_each_dpcm_be(fe, stream, dpcm) { 2432 2433 struct snd_soc_pcm_runtime *be = dpcm->be; 2434 struct snd_pcm_substream *be_substream = 2435 snd_soc_dpcm_get_substream(be, stream); 2436 2437 /* is this op for this BE ? */ 2438 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2439 continue; 2440 2441 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream)) 2442 continue; 2443 2444 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2445 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2446 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2447 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2448 continue; 2449 2450 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2451 be->dai_link->name); 2452 2453 ret = __soc_pcm_prepare(be, be_substream); 2454 if (ret < 0) 2455 break; 2456 2457 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2458 } 2459 2460 return soc_pcm_ret(fe, ret); 2461 } 2462 2463 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2464 { 2465 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2466 int stream = substream->stream, ret = 0; 2467 2468 snd_soc_dpcm_mutex_lock(fe); 2469 2470 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2471 2472 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2473 2474 /* there is no point preparing this FE if there are no BEs */ 2475 if (list_empty(&fe->dpcm[stream].be_clients)) { 2476 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */ 2477 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n", 2478 fe->dai_link->name); 2479 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2480 fe->dai_link->name); 2481 ret = -EINVAL; 2482 goto out; 2483 } 2484 2485 ret = dpcm_be_dai_prepare(fe, stream); 2486 if (ret < 0) 2487 goto out; 2488 2489 /* call prepare on the frontend */ 2490 ret = __soc_pcm_prepare(fe, substream); 2491 if (ret < 0) 2492 goto out; 2493 2494 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2495 2496 out: 2497 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2498 snd_soc_dpcm_mutex_unlock(fe); 2499 2500 return soc_pcm_ret(fe, ret); 2501 } 2502 2503 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2504 { 2505 struct snd_pcm_substream *substream = 2506 snd_soc_dpcm_get_substream(fe, stream); 2507 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2508 int err; 2509 2510 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2511 stream ? "capture" : "playback", fe->dai_link->name); 2512 2513 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2514 /* call bespoke trigger - FE takes care of all BE triggers */ 2515 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2516 fe->dai_link->name); 2517 2518 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2519 } else { 2520 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2521 fe->dai_link->name); 2522 2523 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2524 } 2525 2526 dpcm_be_dai_hw_free(fe, stream); 2527 2528 dpcm_be_dai_shutdown(fe, stream); 2529 2530 /* run the stream event for each BE */ 2531 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2532 2533 return soc_pcm_ret(fe, err); 2534 } 2535 2536 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2537 { 2538 struct snd_pcm_substream *substream = 2539 snd_soc_dpcm_get_substream(fe, stream); 2540 struct snd_soc_dpcm *dpcm; 2541 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2542 int ret = 0; 2543 2544 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2545 stream ? "capture" : "playback", fe->dai_link->name); 2546 2547 /* Only start the BE if the FE is ready */ 2548 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2549 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2550 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2551 fe->dai_link->name, fe->dpcm[stream].state); 2552 ret = -EINVAL; 2553 goto disconnect; 2554 } 2555 2556 /* startup must always be called for new BEs */ 2557 ret = dpcm_be_dai_startup(fe, stream); 2558 if (ret < 0) 2559 goto disconnect; 2560 2561 /* keep going if FE state is > open */ 2562 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2563 return 0; 2564 2565 ret = dpcm_be_dai_hw_params(fe, stream); 2566 if (ret < 0) 2567 goto close; 2568 2569 /* keep going if FE state is > hw_params */ 2570 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2571 return 0; 2572 2573 ret = dpcm_be_dai_prepare(fe, stream); 2574 if (ret < 0) 2575 goto hw_free; 2576 2577 /* run the stream event for each BE */ 2578 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2579 2580 /* keep going if FE state is > prepare */ 2581 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2582 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2583 return 0; 2584 2585 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2586 /* call trigger on the frontend - FE takes care of all BE triggers */ 2587 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2588 fe->dai_link->name); 2589 2590 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2591 if (ret < 0) 2592 goto hw_free; 2593 } else { 2594 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2595 fe->dai_link->name); 2596 2597 ret = dpcm_be_dai_trigger(fe, stream, 2598 SNDRV_PCM_TRIGGER_START); 2599 if (ret < 0) 2600 goto hw_free; 2601 } 2602 2603 return 0; 2604 2605 hw_free: 2606 dpcm_be_dai_hw_free(fe, stream); 2607 close: 2608 dpcm_be_dai_shutdown(fe, stream); 2609 disconnect: 2610 /* disconnect any pending BEs */ 2611 for_each_dpcm_be(fe, stream, dpcm) { 2612 struct snd_soc_pcm_runtime *be = dpcm->be; 2613 2614 /* is this op for this BE ? */ 2615 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2616 continue; 2617 2618 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2619 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2620 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2621 } 2622 2623 return soc_pcm_ret(fe, ret); 2624 } 2625 2626 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2627 { 2628 struct snd_soc_dapm_widget_list *list; 2629 int stream; 2630 int count, paths; 2631 2632 if (!fe->dai_link->dynamic) 2633 return 0; 2634 2635 if (fe->dai_link->num_cpus > 1) { 2636 dev_err(fe->dev, 2637 "%s doesn't support Multi CPU yet\n", __func__); 2638 return -EINVAL; 2639 } 2640 2641 /* only check active links */ 2642 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2643 return 0; 2644 2645 /* DAPM sync will call this to update DSP paths */ 2646 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2647 new ? "new" : "old", fe->dai_link->name); 2648 2649 for_each_pcm_streams(stream) { 2650 2651 /* skip if FE doesn't have playback/capture capability */ 2652 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2653 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2654 continue; 2655 2656 /* skip if FE isn't currently playing/capturing */ 2657 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2658 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2659 continue; 2660 2661 paths = dpcm_path_get(fe, stream, &list); 2662 if (paths < 0) 2663 return paths; 2664 2665 /* update any playback/capture paths */ 2666 count = dpcm_process_paths(fe, stream, &list, new); 2667 if (count) { 2668 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2669 if (new) 2670 dpcm_run_update_startup(fe, stream); 2671 else 2672 dpcm_run_update_shutdown(fe, stream); 2673 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2674 2675 dpcm_clear_pending_state(fe, stream); 2676 dpcm_be_disconnect(fe, stream); 2677 } 2678 2679 dpcm_path_put(&list); 2680 } 2681 2682 return 0; 2683 } 2684 2685 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2686 * any DAI links. 2687 */ 2688 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2689 { 2690 struct snd_soc_pcm_runtime *fe; 2691 int ret = 0; 2692 2693 snd_soc_dpcm_mutex_lock(card); 2694 /* shutdown all old paths first */ 2695 for_each_card_rtds(card, fe) { 2696 ret = soc_dpcm_fe_runtime_update(fe, 0); 2697 if (ret) 2698 goto out; 2699 } 2700 2701 /* bring new paths up */ 2702 for_each_card_rtds(card, fe) { 2703 ret = soc_dpcm_fe_runtime_update(fe, 1); 2704 if (ret) 2705 goto out; 2706 } 2707 2708 out: 2709 snd_soc_dpcm_mutex_unlock(card); 2710 return ret; 2711 } 2712 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2713 2714 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2715 { 2716 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2717 struct snd_soc_dpcm *dpcm; 2718 int stream = fe_substream->stream; 2719 2720 snd_soc_dpcm_mutex_assert_held(fe); 2721 2722 /* mark FE's links ready to prune */ 2723 for_each_dpcm_be(fe, stream, dpcm) 2724 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2725 2726 dpcm_be_disconnect(fe, stream); 2727 } 2728 2729 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2730 { 2731 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2732 int ret; 2733 2734 snd_soc_dpcm_mutex_lock(fe); 2735 ret = dpcm_fe_dai_shutdown(fe_substream); 2736 2737 dpcm_fe_dai_cleanup(fe_substream); 2738 2739 snd_soc_dpcm_mutex_unlock(fe); 2740 return ret; 2741 } 2742 2743 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2744 { 2745 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2746 struct snd_soc_dapm_widget_list *list; 2747 int ret; 2748 int stream = fe_substream->stream; 2749 2750 snd_soc_dpcm_mutex_lock(fe); 2751 2752 ret = dpcm_path_get(fe, stream, &list); 2753 if (ret < 0) 2754 goto open_end; 2755 2756 /* calculate valid and active FE <-> BE dpcms */ 2757 dpcm_process_paths(fe, stream, &list, 1); 2758 2759 ret = dpcm_fe_dai_startup(fe_substream); 2760 if (ret < 0) 2761 dpcm_fe_dai_cleanup(fe_substream); 2762 2763 dpcm_clear_pending_state(fe, stream); 2764 dpcm_path_put(&list); 2765 open_end: 2766 snd_soc_dpcm_mutex_unlock(fe); 2767 return ret; 2768 } 2769 2770 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2771 int *playback, int *capture) 2772 { 2773 struct snd_soc_dai_link *dai_link = rtd->dai_link; 2774 struct snd_soc_dai *cpu_dai; 2775 int has_playback = 0; 2776 int has_capture = 0; 2777 int i; 2778 2779 if (dai_link->dynamic && dai_link->num_cpus > 1) { 2780 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2781 return -EINVAL; 2782 } 2783 2784 if (dai_link->dynamic || dai_link->no_pcm) { 2785 int stream; 2786 2787 if (dai_link->dpcm_playback) { 2788 stream = SNDRV_PCM_STREAM_PLAYBACK; 2789 2790 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2791 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2792 has_playback = 1; 2793 break; 2794 } 2795 } 2796 if (!has_playback) { 2797 dev_err(rtd->card->dev, 2798 "No CPU DAIs support playback for stream %s\n", 2799 dai_link->stream_name); 2800 return -EINVAL; 2801 } 2802 } 2803 if (dai_link->dpcm_capture) { 2804 stream = SNDRV_PCM_STREAM_CAPTURE; 2805 2806 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2807 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2808 has_capture = 1; 2809 break; 2810 } 2811 } 2812 2813 if (!has_capture) { 2814 dev_err(rtd->card->dev, 2815 "No CPU DAIs support capture for stream %s\n", 2816 dai_link->stream_name); 2817 return -EINVAL; 2818 } 2819 } 2820 } else { 2821 struct snd_soc_dai *codec_dai; 2822 2823 /* Adapt stream for codec2codec links */ 2824 int cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE); 2825 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK); 2826 2827 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2828 if (dai_link->num_cpus == 1) { 2829 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2830 } else if (dai_link->num_cpus == dai_link->num_codecs) { 2831 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2832 } else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) { 2833 int cpu_id; 2834 2835 if (!rtd->dai_link->codec_ch_maps) { 2836 dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n", 2837 __func__); 2838 return -EINVAL; 2839 } 2840 2841 cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id; 2842 cpu_dai = asoc_rtd_to_cpu(rtd, cpu_id); 2843 } else { 2844 dev_err(rtd->card->dev, 2845 "%s codec number %d < cpu number %d is not supported\n", 2846 __func__, rtd->dai_link->num_codecs, 2847 rtd->dai_link->num_cpus); 2848 return -EINVAL; 2849 } 2850 2851 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2852 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2853 has_playback = 1; 2854 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2855 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2856 has_capture = 1; 2857 } 2858 } 2859 2860 if (dai_link->playback_only) 2861 has_capture = 0; 2862 2863 if (dai_link->capture_only) 2864 has_playback = 0; 2865 2866 if (!has_playback && !has_capture) { 2867 dev_err(rtd->dev, "substream %s has no playback, no capture\n", 2868 dai_link->stream_name); 2869 2870 return -EINVAL; 2871 } 2872 2873 *playback = has_playback; 2874 *capture = has_capture; 2875 2876 return 0; 2877 } 2878 2879 static int soc_create_pcm(struct snd_pcm **pcm, 2880 struct snd_soc_pcm_runtime *rtd, 2881 int playback, int capture, int num) 2882 { 2883 char new_name[64]; 2884 int ret; 2885 2886 /* create the PCM */ 2887 if (rtd->dai_link->c2c_params) { 2888 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2889 rtd->dai_link->stream_name); 2890 2891 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2892 playback, capture, pcm); 2893 } else if (rtd->dai_link->no_pcm) { 2894 snprintf(new_name, sizeof(new_name), "(%s)", 2895 rtd->dai_link->stream_name); 2896 2897 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2898 playback, capture, pcm); 2899 } else { 2900 if (rtd->dai_link->dynamic) 2901 snprintf(new_name, sizeof(new_name), "%s (*)", 2902 rtd->dai_link->stream_name); 2903 else 2904 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2905 rtd->dai_link->stream_name, 2906 soc_codec_dai_name(rtd), num); 2907 2908 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2909 capture, pcm); 2910 } 2911 if (ret < 0) { 2912 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2913 new_name, rtd->dai_link->name, ret); 2914 return ret; 2915 } 2916 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2917 2918 return 0; 2919 } 2920 2921 /* create a new pcm */ 2922 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2923 { 2924 struct snd_soc_component *component; 2925 struct snd_pcm *pcm; 2926 int ret = 0, playback = 0, capture = 0; 2927 int i; 2928 2929 ret = soc_get_playback_capture(rtd, &playback, &capture); 2930 if (ret < 0) 2931 return ret; 2932 2933 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2934 if (ret < 0) 2935 return ret; 2936 2937 /* DAPM dai link stream work */ 2938 /* 2939 * Currently nothing to do for c2c links 2940 * Since c2c links are internal nodes in the DAPM graph and 2941 * don't interface with the outside world or application layer 2942 * we don't have to do any special handling on close. 2943 */ 2944 if (!rtd->dai_link->c2c_params) 2945 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2946 2947 rtd->pcm = pcm; 2948 pcm->nonatomic = rtd->dai_link->nonatomic; 2949 pcm->private_data = rtd; 2950 pcm->no_device_suspend = true; 2951 2952 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { 2953 if (playback) 2954 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2955 if (capture) 2956 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2957 goto out; 2958 } 2959 2960 /* ASoC PCM operations */ 2961 if (rtd->dai_link->dynamic) { 2962 rtd->ops.open = dpcm_fe_dai_open; 2963 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2964 rtd->ops.prepare = dpcm_fe_dai_prepare; 2965 rtd->ops.trigger = dpcm_fe_dai_trigger; 2966 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2967 rtd->ops.close = dpcm_fe_dai_close; 2968 rtd->ops.pointer = soc_pcm_pointer; 2969 } else { 2970 rtd->ops.open = soc_pcm_open; 2971 rtd->ops.hw_params = soc_pcm_hw_params; 2972 rtd->ops.prepare = soc_pcm_prepare; 2973 rtd->ops.trigger = soc_pcm_trigger; 2974 rtd->ops.hw_free = soc_pcm_hw_free; 2975 rtd->ops.close = soc_pcm_close; 2976 rtd->ops.pointer = soc_pcm_pointer; 2977 } 2978 2979 for_each_rtd_components(rtd, i, component) { 2980 const struct snd_soc_component_driver *drv = component->driver; 2981 2982 if (drv->ioctl) 2983 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2984 if (drv->sync_stop) 2985 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2986 if (drv->copy) 2987 rtd->ops.copy = snd_soc_pcm_component_copy; 2988 if (drv->page) 2989 rtd->ops.page = snd_soc_pcm_component_page; 2990 if (drv->mmap) 2991 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2992 if (drv->ack) 2993 rtd->ops.ack = snd_soc_pcm_component_ack; 2994 } 2995 2996 if (playback) 2997 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2998 2999 if (capture) 3000 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 3001 3002 ret = snd_soc_pcm_component_new(rtd); 3003 if (ret < 0) 3004 return ret; 3005 out: 3006 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 3007 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 3008 return ret; 3009 } 3010 3011 /* is the current PCM operation for this FE ? */ 3012 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 3013 { 3014 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 3015 return 1; 3016 return 0; 3017 } 3018 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 3019 3020 /* is the current PCM operation for this BE ? */ 3021 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 3022 struct snd_soc_pcm_runtime *be, int stream) 3023 { 3024 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 3025 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 3026 be->dpcm[stream].runtime_update)) 3027 return 1; 3028 return 0; 3029 } 3030 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 3031 3032 /* get the substream for this BE */ 3033 struct snd_pcm_substream * 3034 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3035 { 3036 return be->pcm->streams[stream].substream; 3037 } 3038 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3039 3040 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 3041 struct snd_soc_pcm_runtime *be, 3042 int stream, 3043 const enum snd_soc_dpcm_state *states, 3044 int num_states) 3045 { 3046 struct snd_soc_dpcm *dpcm; 3047 int state; 3048 int ret = 1; 3049 int i; 3050 3051 for_each_dpcm_fe(be, stream, dpcm) { 3052 3053 if (dpcm->fe == fe) 3054 continue; 3055 3056 state = dpcm->fe->dpcm[stream].state; 3057 for (i = 0; i < num_states; i++) { 3058 if (state == states[i]) { 3059 ret = 0; 3060 break; 3061 } 3062 } 3063 } 3064 3065 /* it's safe to do this BE DAI */ 3066 return ret; 3067 } 3068 3069 /* 3070 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3071 * are not running, paused or suspended for the specified stream direction. 3072 */ 3073 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3074 struct snd_soc_pcm_runtime *be, int stream) 3075 { 3076 const enum snd_soc_dpcm_state state[] = { 3077 SND_SOC_DPCM_STATE_START, 3078 SND_SOC_DPCM_STATE_PAUSED, 3079 SND_SOC_DPCM_STATE_SUSPEND, 3080 }; 3081 3082 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3083 } 3084 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3085 3086 /* 3087 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3088 * running, paused or suspended for the specified stream direction. 3089 */ 3090 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3091 struct snd_soc_pcm_runtime *be, int stream) 3092 { 3093 const enum snd_soc_dpcm_state state[] = { 3094 SND_SOC_DPCM_STATE_START, 3095 SND_SOC_DPCM_STATE_PAUSED, 3096 SND_SOC_DPCM_STATE_SUSPEND, 3097 SND_SOC_DPCM_STATE_PREPARE, 3098 }; 3099 3100 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3101 } 3102 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3103 3104 /* 3105 * We can only prepare a BE DAI if any of it's FE are not prepared, 3106 * running or paused for the specified stream direction. 3107 */ 3108 int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe, 3109 struct snd_soc_pcm_runtime *be, int stream) 3110 { 3111 const enum snd_soc_dpcm_state state[] = { 3112 SND_SOC_DPCM_STATE_START, 3113 SND_SOC_DPCM_STATE_PAUSED, 3114 SND_SOC_DPCM_STATE_PREPARE, 3115 }; 3116 3117 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3118 } 3119 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared); 3120