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 ? snd_soc_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 ? snd_soc_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(snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 = snd_soc_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 if (snd_soc_dai_stream_active(dai, substream->stream) == 0) { 709 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger) 710 snd_soc_dai_digital_mute(dai, 1, substream->stream); 711 } 712 } 713 } 714 715 for_each_rtd_dais(rtd, i, dai) 716 snd_soc_dai_shutdown(dai, substream, rollback); 717 718 snd_soc_link_shutdown(substream, rollback); 719 720 soc_pcm_components_close(substream, rollback); 721 722 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 723 724 for_each_rtd_components(rtd, i, component) 725 if (!snd_soc_component_active(component)) 726 pinctrl_pm_select_sleep_state(component->dev); 727 728 return 0; 729 } 730 731 /* 732 * Called by ALSA when a PCM substream is closed. Private data can be 733 * freed here. The cpu DAI, codec DAI, machine and components are also 734 * shutdown. 735 */ 736 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 737 struct snd_pcm_substream *substream) 738 { 739 return soc_pcm_clean(rtd, substream, 0); 740 } 741 742 /* PCM close ops for non-DPCM streams */ 743 static int soc_pcm_close(struct snd_pcm_substream *substream) 744 { 745 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 746 747 snd_soc_dpcm_mutex_lock(rtd); 748 __soc_pcm_close(rtd, substream); 749 snd_soc_dpcm_mutex_unlock(rtd); 750 return 0; 751 } 752 753 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 754 { 755 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 756 struct snd_pcm_hardware *hw = &substream->runtime->hw; 757 const char *name_cpu = soc_cpu_dai_name(rtd); 758 const char *name_codec = soc_codec_dai_name(rtd); 759 const char *err_msg; 760 struct device *dev = rtd->dev; 761 762 err_msg = "rates"; 763 if (!hw->rates) 764 goto config_err; 765 766 err_msg = "formats"; 767 if (!hw->formats) 768 goto config_err; 769 770 err_msg = "channels"; 771 if (!hw->channels_min || !hw->channels_max || 772 hw->channels_min > hw->channels_max) 773 goto config_err; 774 775 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 776 name_cpu); 777 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 778 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 779 hw->channels_max); 780 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 781 hw->rate_max); 782 783 return 0; 784 785 config_err: 786 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 787 name_codec, name_cpu, err_msg); 788 return -EINVAL; 789 } 790 791 /* 792 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 793 * then initialized and any private data can be allocated. This also calls 794 * startup for the cpu DAI, component, machine and codec DAI. 795 */ 796 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 797 struct snd_pcm_substream *substream) 798 { 799 struct snd_soc_component *component; 800 struct snd_soc_dai *dai; 801 int i, ret = 0; 802 803 snd_soc_dpcm_mutex_assert_held(rtd); 804 805 for_each_rtd_components(rtd, i, component) 806 pinctrl_pm_select_default_state(component->dev); 807 808 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 809 if (ret < 0) 810 goto err; 811 812 ret = soc_pcm_components_open(substream); 813 if (ret < 0) 814 goto err; 815 816 ret = snd_soc_link_startup(substream); 817 if (ret < 0) 818 goto err; 819 820 /* startup the audio subsystem */ 821 for_each_rtd_dais(rtd, i, dai) { 822 ret = snd_soc_dai_startup(dai, substream); 823 if (ret < 0) 824 goto err; 825 } 826 827 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 828 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 829 goto dynamic; 830 831 /* Check that the codec and cpu DAIs are compatible */ 832 soc_pcm_init_runtime_hw(substream); 833 834 soc_pcm_update_symmetry(substream); 835 836 ret = soc_hw_sanity_check(substream); 837 if (ret < 0) 838 goto err; 839 840 soc_pcm_apply_msb(substream); 841 842 /* Symmetry only applies if we've already got an active stream. */ 843 for_each_rtd_dais(rtd, i, dai) { 844 ret = soc_pcm_apply_symmetry(substream, dai); 845 if (ret != 0) 846 goto err; 847 } 848 dynamic: 849 snd_soc_runtime_activate(rtd, substream->stream); 850 ret = 0; 851 err: 852 if (ret < 0) 853 soc_pcm_clean(rtd, substream, 1); 854 855 return soc_pcm_ret(rtd, ret); 856 } 857 858 /* PCM open ops for non-DPCM streams */ 859 static int soc_pcm_open(struct snd_pcm_substream *substream) 860 { 861 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 862 int ret; 863 864 snd_soc_dpcm_mutex_lock(rtd); 865 ret = __soc_pcm_open(rtd, substream); 866 snd_soc_dpcm_mutex_unlock(rtd); 867 return ret; 868 } 869 870 /* 871 * Called by ALSA when the PCM substream is prepared, can set format, sample 872 * rate, etc. This function is non atomic and can be called multiple times, 873 * it can refer to the runtime info. 874 */ 875 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 876 struct snd_pcm_substream *substream) 877 { 878 struct snd_soc_dai *dai; 879 int i, ret = 0; 880 881 snd_soc_dpcm_mutex_assert_held(rtd); 882 883 ret = snd_soc_link_prepare(substream); 884 if (ret < 0) 885 goto out; 886 887 ret = snd_soc_pcm_component_prepare(substream); 888 if (ret < 0) 889 goto out; 890 891 ret = snd_soc_pcm_dai_prepare(substream); 892 if (ret < 0) 893 goto out; 894 895 /* cancel any delayed stream shutdown that is pending */ 896 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 897 rtd->pop_wait) { 898 rtd->pop_wait = 0; 899 cancel_delayed_work(&rtd->delayed_work); 900 } 901 902 snd_soc_dapm_stream_event(rtd, substream->stream, 903 SND_SOC_DAPM_STREAM_START); 904 905 for_each_rtd_dais(rtd, i, dai) { 906 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger) 907 snd_soc_dai_digital_mute(dai, 0, substream->stream); 908 } 909 910 out: 911 return soc_pcm_ret(rtd, ret); 912 } 913 914 /* PCM prepare ops for non-DPCM streams */ 915 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 916 { 917 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 918 int ret; 919 920 snd_soc_dpcm_mutex_lock(rtd); 921 ret = __soc_pcm_prepare(rtd, substream); 922 snd_soc_dpcm_mutex_unlock(rtd); 923 return ret; 924 } 925 926 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 927 unsigned int mask) 928 { 929 struct snd_interval *interval; 930 int channels = hweight_long(mask); 931 932 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 933 interval->min = channels; 934 interval->max = channels; 935 } 936 937 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 938 struct snd_pcm_substream *substream, int rollback) 939 { 940 struct snd_soc_dai *dai; 941 int i; 942 943 snd_soc_dpcm_mutex_assert_held(rtd); 944 945 /* clear the corresponding DAIs parameters when going to be inactive */ 946 for_each_rtd_dais(rtd, i, dai) { 947 if (snd_soc_dai_active(dai) == 1) 948 soc_pcm_set_dai_params(dai, NULL); 949 950 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) 951 snd_soc_dai_digital_mute(dai, 1, substream->stream); 952 } 953 954 /* run the stream event */ 955 snd_soc_dapm_stream_stop(rtd, substream->stream); 956 957 /* free any machine hw params */ 958 snd_soc_link_hw_free(substream, rollback); 959 960 /* free any component resources */ 961 snd_soc_pcm_component_hw_free(substream, rollback); 962 963 /* now free hw params for the DAIs */ 964 for_each_rtd_dais(rtd, i, dai) 965 if (snd_soc_dai_stream_valid(dai, substream->stream)) 966 snd_soc_dai_hw_free(dai, substream, rollback); 967 968 return 0; 969 } 970 971 /* 972 * Frees resources allocated by hw_params, can be called multiple times 973 */ 974 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 975 struct snd_pcm_substream *substream) 976 { 977 return soc_pcm_hw_clean(rtd, substream, 0); 978 } 979 980 /* hw_free PCM ops for non-DPCM streams */ 981 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 982 { 983 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 984 int ret; 985 986 snd_soc_dpcm_mutex_lock(rtd); 987 ret = __soc_pcm_hw_free(rtd, substream); 988 snd_soc_dpcm_mutex_unlock(rtd); 989 return ret; 990 } 991 992 /* 993 * Called by ALSA when the hardware params are set by application. This 994 * function can also be called multiple times and can allocate buffers 995 * (using snd_pcm_lib_* ). It's non-atomic. 996 */ 997 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, 998 struct snd_pcm_substream *substream, 999 struct snd_pcm_hw_params *params) 1000 { 1001 struct snd_soc_dai *cpu_dai; 1002 struct snd_soc_dai *codec_dai; 1003 struct snd_pcm_hw_params tmp_params; 1004 int i, ret = 0; 1005 1006 snd_soc_dpcm_mutex_assert_held(rtd); 1007 1008 ret = soc_pcm_params_symmetry(substream, params); 1009 if (ret) 1010 goto out; 1011 1012 ret = snd_soc_link_hw_params(substream, params); 1013 if (ret < 0) 1014 goto out; 1015 1016 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1017 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); 1018 1019 /* 1020 * Skip CODECs which don't support the current stream type, 1021 * the idea being that if a CODEC is not used for the currently 1022 * set up transfer direction, it should not need to be 1023 * configured, especially since the configuration used might 1024 * not even be supported by that CODEC. There may be cases 1025 * however where a CODEC needs to be set up although it is 1026 * actually not being used for the transfer, e.g. if a 1027 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1028 * for the DAI link including a playback-only CODEC. 1029 * If this becomes necessary, we will have to augment the 1030 * machine driver setup with information on how to act, so 1031 * we can do the right thing here. 1032 */ 1033 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1034 continue; 1035 1036 /* copy params for each codec */ 1037 tmp_params = *params; 1038 1039 /* fixup params based on TDM slot masks */ 1040 if (tdm_mask) 1041 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask); 1042 1043 ret = snd_soc_dai_hw_params(codec_dai, substream, 1044 &tmp_params); 1045 if(ret < 0) 1046 goto out; 1047 1048 soc_pcm_set_dai_params(codec_dai, &tmp_params); 1049 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai); 1050 } 1051 1052 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1053 unsigned int ch_mask = 0; 1054 int j; 1055 1056 /* 1057 * Skip CPUs which don't support the current stream 1058 * type. See soc_pcm_init_runtime_hw() for more details 1059 */ 1060 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1061 continue; 1062 1063 /* copy params for each cpu */ 1064 tmp_params = *params; 1065 1066 if (!rtd->dai_link->codec_ch_maps) 1067 goto hw_params; 1068 /* 1069 * construct cpu channel mask by combining ch_mask of each 1070 * codec which maps to the cpu. 1071 */ 1072 for_each_rtd_codec_dais(rtd, j, codec_dai) { 1073 if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i) 1074 ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask; 1075 } 1076 1077 /* fixup cpu channel number */ 1078 if (ch_mask) 1079 soc_pcm_codec_params_fixup(&tmp_params, ch_mask); 1080 1081 hw_params: 1082 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params); 1083 if (ret < 0) 1084 goto out; 1085 1086 /* store the parameters for each DAI */ 1087 soc_pcm_set_dai_params(cpu_dai, &tmp_params); 1088 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai); 1089 } 1090 1091 ret = snd_soc_pcm_component_hw_params(substream, params); 1092 out: 1093 if (ret < 0) 1094 soc_pcm_hw_clean(rtd, substream, 1); 1095 1096 return soc_pcm_ret(rtd, ret); 1097 } 1098 1099 /* hw_params PCM ops for non-DPCM streams */ 1100 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1101 struct snd_pcm_hw_params *params) 1102 { 1103 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1104 int ret; 1105 1106 snd_soc_dpcm_mutex_lock(rtd); 1107 ret = __soc_pcm_hw_params(rtd, substream, params); 1108 snd_soc_dpcm_mutex_unlock(rtd); 1109 return ret; 1110 } 1111 1112 #define TRIGGER_MAX 3 1113 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = { 1114 [SND_SOC_TRIGGER_ORDER_DEFAULT] = { 1115 snd_soc_link_trigger, 1116 snd_soc_pcm_component_trigger, 1117 snd_soc_pcm_dai_trigger, 1118 }, 1119 [SND_SOC_TRIGGER_ORDER_LDC] = { 1120 snd_soc_link_trigger, 1121 snd_soc_pcm_dai_trigger, 1122 snd_soc_pcm_component_trigger, 1123 }, 1124 }; 1125 1126 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1127 { 1128 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1129 struct snd_soc_component *component; 1130 int ret = 0, r = 0, i; 1131 int rollback = 0; 1132 int start = 0, stop = 0; 1133 1134 /* 1135 * select START/STOP sequence 1136 */ 1137 for_each_rtd_components(rtd, i, component) { 1138 if (component->driver->trigger_start) 1139 start = component->driver->trigger_start; 1140 if (component->driver->trigger_stop) 1141 stop = component->driver->trigger_stop; 1142 } 1143 if (rtd->dai_link->trigger_start) 1144 start = rtd->dai_link->trigger_start; 1145 if (rtd->dai_link->trigger_stop) 1146 stop = rtd->dai_link->trigger_stop; 1147 1148 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX || 1149 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX) 1150 return -EINVAL; 1151 1152 /* 1153 * START 1154 */ 1155 switch (cmd) { 1156 case SNDRV_PCM_TRIGGER_START: 1157 case SNDRV_PCM_TRIGGER_RESUME: 1158 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1159 for (i = 0; i < TRIGGER_MAX; i++) { 1160 r = trigger[start][i](substream, cmd, 0); 1161 if (r < 0) 1162 break; 1163 } 1164 } 1165 1166 /* 1167 * Rollback if START failed 1168 * find correspond STOP command 1169 */ 1170 if (r < 0) { 1171 rollback = 1; 1172 ret = r; 1173 switch (cmd) { 1174 case SNDRV_PCM_TRIGGER_START: 1175 cmd = SNDRV_PCM_TRIGGER_STOP; 1176 break; 1177 case SNDRV_PCM_TRIGGER_RESUME: 1178 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1179 break; 1180 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1181 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1182 break; 1183 } 1184 } 1185 1186 /* 1187 * STOP 1188 */ 1189 switch (cmd) { 1190 case SNDRV_PCM_TRIGGER_STOP: 1191 case SNDRV_PCM_TRIGGER_SUSPEND: 1192 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1193 for (i = TRIGGER_MAX; i > 0; i--) { 1194 r = trigger[stop][i - 1](substream, cmd, rollback); 1195 if (r < 0) 1196 ret = r; 1197 } 1198 } 1199 1200 return ret; 1201 } 1202 1203 /* 1204 * soc level wrapper for pointer callback 1205 * If cpu_dai, codec_dai, component driver has the delay callback, then 1206 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1207 */ 1208 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1209 { 1210 struct snd_pcm_runtime *runtime = substream->runtime; 1211 snd_pcm_uframes_t offset = 0; 1212 snd_pcm_sframes_t codec_delay = 0; 1213 snd_pcm_sframes_t cpu_delay = 0; 1214 1215 offset = snd_soc_pcm_component_pointer(substream); 1216 1217 /* should be called *after* snd_soc_pcm_component_pointer() */ 1218 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1219 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1220 1221 runtime->delay = cpu_delay + codec_delay; 1222 1223 return offset; 1224 } 1225 1226 /* connect a FE and BE */ 1227 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1228 struct snd_soc_pcm_runtime *be, int stream) 1229 { 1230 struct snd_pcm_substream *fe_substream; 1231 struct snd_pcm_substream *be_substream; 1232 struct snd_soc_dpcm *dpcm; 1233 1234 snd_soc_dpcm_mutex_assert_held(fe); 1235 1236 /* only add new dpcms */ 1237 for_each_dpcm_be(fe, stream, dpcm) { 1238 if (dpcm->be == be && dpcm->fe == fe) 1239 return 0; 1240 } 1241 1242 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1243 be_substream = snd_soc_dpcm_get_substream(be, stream); 1244 1245 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { 1246 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", 1247 __func__); 1248 return -EINVAL; 1249 } 1250 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1251 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1252 be_substream->pcm->nonatomic = 1; 1253 } 1254 1255 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1256 if (!dpcm) 1257 return -ENOMEM; 1258 1259 dpcm->be = be; 1260 dpcm->fe = fe; 1261 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1262 snd_soc_dpcm_stream_lock_irq(fe, stream); 1263 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1264 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1265 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1266 1267 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1268 stream ? "capture" : "playback", fe->dai_link->name, 1269 stream ? "<-" : "->", be->dai_link->name); 1270 1271 dpcm_create_debugfs_state(dpcm, stream); 1272 1273 return 1; 1274 } 1275 1276 /* reparent a BE onto another FE */ 1277 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1278 struct snd_soc_pcm_runtime *be, int stream) 1279 { 1280 struct snd_soc_dpcm *dpcm; 1281 struct snd_pcm_substream *fe_substream, *be_substream; 1282 1283 /* reparent if BE is connected to other FEs */ 1284 if (!be->dpcm[stream].users) 1285 return; 1286 1287 be_substream = snd_soc_dpcm_get_substream(be, stream); 1288 if (!be_substream) 1289 return; 1290 1291 for_each_dpcm_fe(be, stream, dpcm) { 1292 if (dpcm->fe == fe) 1293 continue; 1294 1295 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1296 stream ? "capture" : "playback", 1297 dpcm->fe->dai_link->name, 1298 stream ? "<-" : "->", dpcm->be->dai_link->name); 1299 1300 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1301 be_substream->runtime = fe_substream->runtime; 1302 break; 1303 } 1304 } 1305 1306 /* disconnect a BE and FE */ 1307 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1308 { 1309 struct snd_soc_dpcm *dpcm, *d; 1310 LIST_HEAD(deleted_dpcms); 1311 1312 snd_soc_dpcm_mutex_assert_held(fe); 1313 1314 snd_soc_dpcm_stream_lock_irq(fe, stream); 1315 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1316 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1317 stream ? "capture" : "playback", 1318 dpcm->be->dai_link->name); 1319 1320 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1321 continue; 1322 1323 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1324 stream ? "capture" : "playback", fe->dai_link->name, 1325 stream ? "<-" : "->", dpcm->be->dai_link->name); 1326 1327 /* BEs still alive need new FE */ 1328 dpcm_be_reparent(fe, dpcm->be, stream); 1329 1330 list_del(&dpcm->list_be); 1331 list_move(&dpcm->list_fe, &deleted_dpcms); 1332 } 1333 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1334 1335 while (!list_empty(&deleted_dpcms)) { 1336 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1337 list_fe); 1338 list_del(&dpcm->list_fe); 1339 dpcm_remove_debugfs_state(dpcm); 1340 kfree(dpcm); 1341 } 1342 } 1343 1344 /* get BE for DAI widget and stream */ 1345 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1346 struct snd_soc_dapm_widget *widget, int stream) 1347 { 1348 struct snd_soc_pcm_runtime *be; 1349 struct snd_soc_dapm_widget *w; 1350 struct snd_soc_dai *dai; 1351 int i; 1352 1353 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1354 1355 for_each_card_rtds(card, be) { 1356 1357 if (!be->dai_link->no_pcm) 1358 continue; 1359 1360 if (!snd_soc_dpcm_get_substream(be, stream)) 1361 continue; 1362 1363 for_each_rtd_dais(be, i, dai) { 1364 w = snd_soc_dai_get_widget(dai, stream); 1365 1366 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1367 w ? w->name : "(not set)"); 1368 1369 if (w == widget) 1370 return be; 1371 } 1372 } 1373 1374 /* Widget provided is not a BE */ 1375 return NULL; 1376 } 1377 1378 int widget_in_list(struct snd_soc_dapm_widget_list *list, 1379 struct snd_soc_dapm_widget *widget) 1380 { 1381 struct snd_soc_dapm_widget *w; 1382 int i; 1383 1384 for_each_dapm_widgets(list, i, w) 1385 if (widget == w) 1386 return 1; 1387 1388 return 0; 1389 } 1390 EXPORT_SYMBOL_GPL(widget_in_list); 1391 1392 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1393 { 1394 struct snd_soc_card *card = widget->dapm->card; 1395 struct snd_soc_pcm_runtime *rtd; 1396 int stream; 1397 1398 /* adjust dir to stream */ 1399 if (dir == SND_SOC_DAPM_DIR_OUT) 1400 stream = SNDRV_PCM_STREAM_PLAYBACK; 1401 else 1402 stream = SNDRV_PCM_STREAM_CAPTURE; 1403 1404 rtd = dpcm_get_be(card, widget, stream); 1405 if (rtd) 1406 return true; 1407 1408 return false; 1409 } 1410 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1411 1412 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1413 int stream, struct snd_soc_dapm_widget_list **list) 1414 { 1415 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0); 1416 int paths; 1417 1418 if (fe->dai_link->num_cpus > 1) { 1419 dev_err(fe->dev, 1420 "%s doesn't support Multi CPU yet\n", __func__); 1421 return -EINVAL; 1422 } 1423 1424 /* get number of valid DAI paths and their widgets */ 1425 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1426 fe->card->component_chaining ? 1427 NULL : dpcm_end_walk_at_be); 1428 1429 if (paths > 0) 1430 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1431 stream ? "capture" : "playback"); 1432 else if (paths == 0) 1433 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1434 stream ? "capture" : "playback"); 1435 1436 return paths; 1437 } 1438 1439 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1440 { 1441 snd_soc_dapm_dai_free_widgets(list); 1442 } 1443 1444 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1445 struct snd_soc_dapm_widget_list *list) 1446 { 1447 struct snd_soc_dai *dai; 1448 unsigned int i; 1449 1450 /* is there a valid DAI widget for this BE */ 1451 for_each_rtd_dais(dpcm->be, i, dai) { 1452 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1453 1454 /* 1455 * The BE is pruned only if none of the dai 1456 * widgets are in the active list. 1457 */ 1458 if (widget && widget_in_list(list, widget)) 1459 return true; 1460 } 1461 1462 return false; 1463 } 1464 1465 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1466 struct snd_soc_dapm_widget_list **list_) 1467 { 1468 struct snd_soc_dpcm *dpcm; 1469 int prune = 0; 1470 1471 /* Destroy any old FE <--> BE connections */ 1472 for_each_dpcm_be(fe, stream, dpcm) { 1473 if (dpcm_be_is_active(dpcm, stream, *list_)) 1474 continue; 1475 1476 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1477 stream ? "capture" : "playback", 1478 dpcm->be->dai_link->name, fe->dai_link->name); 1479 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1480 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1481 prune++; 1482 } 1483 1484 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1485 return prune; 1486 } 1487 1488 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1489 struct snd_soc_dapm_widget_list **list_) 1490 { 1491 struct snd_soc_card *card = fe->card; 1492 struct snd_soc_dapm_widget_list *list = *list_; 1493 struct snd_soc_pcm_runtime *be; 1494 struct snd_soc_dapm_widget *widget; 1495 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1496 int i, new = 0, err; 1497 1498 /* don't connect if FE is not running */ 1499 if (!fe_substream->runtime && !fe->fe_compr) 1500 return new; 1501 1502 /* Create any new FE <--> BE connections */ 1503 for_each_dapm_widgets(list, i, widget) { 1504 1505 switch (widget->id) { 1506 case snd_soc_dapm_dai_in: 1507 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1508 continue; 1509 break; 1510 case snd_soc_dapm_dai_out: 1511 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1512 continue; 1513 break; 1514 default: 1515 continue; 1516 } 1517 1518 /* is there a valid BE rtd for this widget */ 1519 be = dpcm_get_be(card, widget, stream); 1520 if (!be) { 1521 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1522 widget->name); 1523 continue; 1524 } 1525 1526 /* 1527 * Filter for systems with 'component_chaining' enabled. 1528 * This helps to avoid unnecessary re-configuration of an 1529 * already active BE on such systems. 1530 */ 1531 if (fe->card->component_chaining && 1532 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1533 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1534 continue; 1535 1536 /* newly connected FE and BE */ 1537 err = dpcm_be_connect(fe, be, stream); 1538 if (err < 0) { 1539 dev_err(fe->dev, "ASoC: can't connect %s\n", 1540 widget->name); 1541 break; 1542 } else if (err == 0) /* already connected */ 1543 continue; 1544 1545 /* new */ 1546 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1547 new++; 1548 } 1549 1550 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1551 return new; 1552 } 1553 1554 /* 1555 * Find the corresponding BE DAIs that source or sink audio to this 1556 * FE substream. 1557 */ 1558 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1559 int stream, struct snd_soc_dapm_widget_list **list, int new) 1560 { 1561 if (new) 1562 return dpcm_add_paths(fe, stream, list); 1563 else 1564 return dpcm_prune_paths(fe, stream, list); 1565 } 1566 1567 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1568 { 1569 struct snd_soc_dpcm *dpcm; 1570 1571 for_each_dpcm_be(fe, stream, dpcm) 1572 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1573 } 1574 1575 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1576 int do_hw_free, struct snd_soc_dpcm *last) 1577 { 1578 struct snd_soc_dpcm *dpcm; 1579 1580 /* disable any enabled and non active backends */ 1581 for_each_dpcm_be(fe, stream, dpcm) { 1582 struct snd_soc_pcm_runtime *be = dpcm->be; 1583 struct snd_pcm_substream *be_substream = 1584 snd_soc_dpcm_get_substream(be, stream); 1585 1586 if (dpcm == last) 1587 return; 1588 1589 /* is this op for this BE ? */ 1590 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1591 continue; 1592 1593 if (be->dpcm[stream].users == 0) { 1594 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1595 stream ? "capture" : "playback", 1596 be->dpcm[stream].state); 1597 continue; 1598 } 1599 1600 if (--be->dpcm[stream].users != 0) 1601 continue; 1602 1603 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1604 if (!do_hw_free) 1605 continue; 1606 1607 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1608 __soc_pcm_hw_free(be, be_substream); 1609 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1610 } 1611 } 1612 1613 __soc_pcm_close(be, be_substream); 1614 be_substream->runtime = NULL; 1615 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1616 } 1617 } 1618 1619 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1620 { 1621 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1622 struct snd_soc_pcm_runtime *be; 1623 struct snd_soc_dpcm *dpcm; 1624 int err, count = 0; 1625 1626 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1627 for_each_dpcm_be(fe, stream, dpcm) { 1628 struct snd_pcm_substream *be_substream; 1629 1630 be = dpcm->be; 1631 be_substream = snd_soc_dpcm_get_substream(be, stream); 1632 1633 if (!be_substream) { 1634 dev_err(be->dev, "ASoC: no backend %s stream\n", 1635 stream ? "capture" : "playback"); 1636 continue; 1637 } 1638 1639 /* is this op for this BE ? */ 1640 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1641 continue; 1642 1643 /* first time the dpcm is open ? */ 1644 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1645 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1646 stream ? "capture" : "playback", 1647 be->dpcm[stream].state); 1648 continue; 1649 } 1650 1651 if (be->dpcm[stream].users++ != 0) 1652 continue; 1653 1654 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1655 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1656 continue; 1657 1658 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1659 stream ? "capture" : "playback", be->dai_link->name); 1660 1661 be_substream->runtime = fe_substream->runtime; 1662 err = __soc_pcm_open(be, be_substream); 1663 if (err < 0) { 1664 be->dpcm[stream].users--; 1665 if (be->dpcm[stream].users < 0) 1666 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1667 stream ? "capture" : "playback", 1668 be->dpcm[stream].state); 1669 1670 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1671 goto unwind; 1672 } 1673 be->dpcm[stream].be_start = 0; 1674 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1675 count++; 1676 } 1677 1678 return count; 1679 1680 unwind: 1681 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1682 1683 return soc_pcm_ret(fe, err); 1684 } 1685 1686 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1687 { 1688 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1689 struct snd_pcm_runtime *runtime = substream->runtime; 1690 struct snd_pcm_hardware *hw = &runtime->hw; 1691 struct snd_soc_dai *dai; 1692 int stream = substream->stream; 1693 u64 formats = hw->formats; 1694 int i; 1695 1696 soc_pcm_hw_init(hw); 1697 1698 if (formats) 1699 hw->formats &= formats; 1700 1701 for_each_rtd_cpu_dais(fe, i, dai) { 1702 struct snd_soc_pcm_stream *cpu_stream; 1703 1704 /* 1705 * Skip CPUs which don't support the current stream 1706 * type. See soc_pcm_init_runtime_hw() for more details 1707 */ 1708 if (!snd_soc_dai_stream_valid(dai, stream)) 1709 continue; 1710 1711 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1712 1713 soc_pcm_hw_update_rate(hw, cpu_stream); 1714 soc_pcm_hw_update_chan(hw, cpu_stream); 1715 soc_pcm_hw_update_format(hw, cpu_stream); 1716 } 1717 1718 } 1719 1720 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1721 { 1722 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1723 struct snd_pcm_runtime *runtime = substream->runtime; 1724 struct snd_pcm_hardware *hw = &runtime->hw; 1725 struct snd_soc_dpcm *dpcm; 1726 struct snd_soc_dai *dai; 1727 int stream = substream->stream; 1728 1729 if (!fe->dai_link->dpcm_merged_format) 1730 return; 1731 1732 /* 1733 * It returns merged BE codec format 1734 * if FE want to use it (= dpcm_merged_format) 1735 */ 1736 1737 for_each_dpcm_be(fe, stream, dpcm) { 1738 struct snd_soc_pcm_runtime *be = dpcm->be; 1739 struct snd_soc_pcm_stream *codec_stream; 1740 int i; 1741 1742 for_each_rtd_codec_dais(be, i, dai) { 1743 /* 1744 * Skip CODECs which don't support the current stream 1745 * type. See soc_pcm_init_runtime_hw() for more details 1746 */ 1747 if (!snd_soc_dai_stream_valid(dai, stream)) 1748 continue; 1749 1750 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1751 1752 soc_pcm_hw_update_format(hw, codec_stream); 1753 } 1754 } 1755 } 1756 1757 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1758 { 1759 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1760 struct snd_pcm_runtime *runtime = substream->runtime; 1761 struct snd_pcm_hardware *hw = &runtime->hw; 1762 struct snd_soc_dpcm *dpcm; 1763 int stream = substream->stream; 1764 1765 if (!fe->dai_link->dpcm_merged_chan) 1766 return; 1767 1768 /* 1769 * It returns merged BE codec channel; 1770 * if FE want to use it (= dpcm_merged_chan) 1771 */ 1772 1773 for_each_dpcm_be(fe, stream, dpcm) { 1774 struct snd_soc_pcm_runtime *be = dpcm->be; 1775 struct snd_soc_pcm_stream *cpu_stream; 1776 struct snd_soc_dai *dai; 1777 int i; 1778 1779 for_each_rtd_cpu_dais(be, i, dai) { 1780 /* 1781 * Skip CPUs which don't support the current stream 1782 * type. See soc_pcm_init_runtime_hw() for more details 1783 */ 1784 if (!snd_soc_dai_stream_valid(dai, stream)) 1785 continue; 1786 1787 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1788 1789 soc_pcm_hw_update_chan(hw, cpu_stream); 1790 } 1791 1792 /* 1793 * chan min/max cannot be enforced if there are multiple CODEC 1794 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1795 */ 1796 if (be->dai_link->num_codecs == 1) { 1797 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1798 snd_soc_rtd_to_codec(be, 0), stream); 1799 1800 soc_pcm_hw_update_chan(hw, codec_stream); 1801 } 1802 } 1803 } 1804 1805 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1806 { 1807 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1808 struct snd_pcm_runtime *runtime = substream->runtime; 1809 struct snd_pcm_hardware *hw = &runtime->hw; 1810 struct snd_soc_dpcm *dpcm; 1811 int stream = substream->stream; 1812 1813 if (!fe->dai_link->dpcm_merged_rate) 1814 return; 1815 1816 /* 1817 * It returns merged BE codec channel; 1818 * if FE want to use it (= dpcm_merged_chan) 1819 */ 1820 1821 for_each_dpcm_be(fe, stream, dpcm) { 1822 struct snd_soc_pcm_runtime *be = dpcm->be; 1823 struct snd_soc_pcm_stream *pcm; 1824 struct snd_soc_dai *dai; 1825 int i; 1826 1827 for_each_rtd_dais(be, i, dai) { 1828 /* 1829 * Skip DAIs which don't support the current stream 1830 * type. See soc_pcm_init_runtime_hw() for more details 1831 */ 1832 if (!snd_soc_dai_stream_valid(dai, stream)) 1833 continue; 1834 1835 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1836 1837 soc_pcm_hw_update_rate(hw, pcm); 1838 } 1839 } 1840 } 1841 1842 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1843 int stream) 1844 { 1845 struct snd_soc_dpcm *dpcm; 1846 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 1847 struct snd_soc_dai *fe_cpu_dai; 1848 int err = 0; 1849 int i; 1850 1851 /* apply symmetry for FE */ 1852 soc_pcm_update_symmetry(fe_substream); 1853 1854 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1855 /* Symmetry only applies if we've got an active stream. */ 1856 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1857 if (err < 0) 1858 goto error; 1859 } 1860 1861 /* apply symmetry for BE */ 1862 for_each_dpcm_be(fe, stream, dpcm) { 1863 struct snd_soc_pcm_runtime *be = dpcm->be; 1864 struct snd_pcm_substream *be_substream = 1865 snd_soc_dpcm_get_substream(be, stream); 1866 struct snd_soc_pcm_runtime *rtd; 1867 struct snd_soc_dai *dai; 1868 1869 /* A backend may not have the requested substream */ 1870 if (!be_substream) 1871 continue; 1872 1873 rtd = snd_soc_substream_to_rtd(be_substream); 1874 if (rtd->dai_link->be_hw_params_fixup) 1875 continue; 1876 1877 soc_pcm_update_symmetry(be_substream); 1878 1879 /* Symmetry only applies if we've got an active stream. */ 1880 for_each_rtd_dais(rtd, i, dai) { 1881 err = soc_pcm_apply_symmetry(fe_substream, dai); 1882 if (err < 0) 1883 goto error; 1884 } 1885 } 1886 error: 1887 return soc_pcm_ret(fe, err); 1888 } 1889 1890 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1891 { 1892 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 1893 int stream = fe_substream->stream, ret = 0; 1894 1895 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1896 1897 ret = dpcm_be_dai_startup(fe, stream); 1898 if (ret < 0) 1899 goto be_err; 1900 1901 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1902 1903 /* start the DAI frontend */ 1904 ret = __soc_pcm_open(fe, fe_substream); 1905 if (ret < 0) 1906 goto unwind; 1907 1908 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1909 1910 dpcm_runtime_setup_fe(fe_substream); 1911 1912 dpcm_runtime_setup_be_format(fe_substream); 1913 dpcm_runtime_setup_be_chan(fe_substream); 1914 dpcm_runtime_setup_be_rate(fe_substream); 1915 1916 ret = dpcm_apply_symmetry(fe_substream, stream); 1917 1918 unwind: 1919 if (ret < 0) 1920 dpcm_be_dai_startup_unwind(fe, stream); 1921 be_err: 1922 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1923 1924 return soc_pcm_ret(fe, ret); 1925 } 1926 1927 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1928 { 1929 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1930 int stream = substream->stream; 1931 1932 snd_soc_dpcm_mutex_assert_held(fe); 1933 1934 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1935 1936 /* shutdown the BEs */ 1937 dpcm_be_dai_shutdown(fe, stream); 1938 1939 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1940 1941 /* now shutdown the frontend */ 1942 __soc_pcm_close(fe, substream); 1943 1944 /* run the stream stop event */ 1945 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1946 1947 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1948 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1949 return 0; 1950 } 1951 1952 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1953 { 1954 struct snd_soc_dpcm *dpcm; 1955 1956 /* only hw_params backends that are either sinks or sources 1957 * to this frontend DAI */ 1958 for_each_dpcm_be(fe, stream, dpcm) { 1959 1960 struct snd_soc_pcm_runtime *be = dpcm->be; 1961 struct snd_pcm_substream *be_substream = 1962 snd_soc_dpcm_get_substream(be, stream); 1963 1964 /* is this op for this BE ? */ 1965 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1966 continue; 1967 1968 /* only free hw when no longer used - check all FEs */ 1969 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1970 continue; 1971 1972 /* do not free hw if this BE is used by other FE */ 1973 if (be->dpcm[stream].users > 1) 1974 continue; 1975 1976 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1977 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1978 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1979 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1980 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1981 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1982 continue; 1983 1984 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1985 be->dai_link->name); 1986 1987 __soc_pcm_hw_free(be, be_substream); 1988 1989 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1990 } 1991 } 1992 1993 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1994 { 1995 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1996 int stream = substream->stream; 1997 1998 snd_soc_dpcm_mutex_lock(fe); 1999 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2000 2001 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2002 2003 /* call hw_free on the frontend */ 2004 soc_pcm_hw_clean(fe, substream, 0); 2005 2006 /* only hw_params backends that are either sinks or sources 2007 * to this frontend DAI */ 2008 dpcm_be_dai_hw_free(fe, stream); 2009 2010 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2011 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2012 2013 snd_soc_dpcm_mutex_unlock(fe); 2014 return 0; 2015 } 2016 2017 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2018 { 2019 struct snd_soc_pcm_runtime *be; 2020 struct snd_pcm_substream *be_substream; 2021 struct snd_soc_dpcm *dpcm; 2022 int ret; 2023 2024 for_each_dpcm_be(fe, stream, dpcm) { 2025 struct snd_pcm_hw_params hw_params; 2026 2027 be = dpcm->be; 2028 be_substream = snd_soc_dpcm_get_substream(be, stream); 2029 2030 /* is this op for this BE ? */ 2031 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2032 continue; 2033 2034 /* copy params for each dpcm */ 2035 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 2036 sizeof(struct snd_pcm_hw_params)); 2037 2038 /* perform any hw_params fixups */ 2039 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 2040 if (ret < 0) 2041 goto unwind; 2042 2043 /* copy the fixed-up hw params for BE dai */ 2044 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2045 sizeof(struct snd_pcm_hw_params)); 2046 2047 /* only allow hw_params() if no connected FEs are running */ 2048 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2049 continue; 2050 2051 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2052 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2053 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2054 continue; 2055 2056 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2057 be->dai_link->name); 2058 2059 ret = __soc_pcm_hw_params(be, be_substream, &hw_params); 2060 if (ret < 0) 2061 goto unwind; 2062 2063 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2064 } 2065 return 0; 2066 2067 unwind: 2068 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2069 __func__, be->dai_link->name, ret); 2070 2071 /* disable any enabled and non active backends */ 2072 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2073 be = dpcm->be; 2074 be_substream = snd_soc_dpcm_get_substream(be, stream); 2075 2076 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2077 continue; 2078 2079 /* only allow hw_free() if no connected FEs are running */ 2080 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2081 continue; 2082 2083 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2084 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2085 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2086 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2087 continue; 2088 2089 __soc_pcm_hw_free(be, be_substream); 2090 } 2091 2092 return ret; 2093 } 2094 2095 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2096 struct snd_pcm_hw_params *params) 2097 { 2098 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2099 int ret, stream = substream->stream; 2100 2101 snd_soc_dpcm_mutex_lock(fe); 2102 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2103 2104 memcpy(&fe->dpcm[stream].hw_params, params, 2105 sizeof(struct snd_pcm_hw_params)); 2106 ret = dpcm_be_dai_hw_params(fe, stream); 2107 if (ret < 0) 2108 goto out; 2109 2110 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2111 fe->dai_link->name, params_rate(params), 2112 params_channels(params), params_format(params)); 2113 2114 /* call hw_params on the frontend */ 2115 ret = __soc_pcm_hw_params(fe, substream, params); 2116 if (ret < 0) 2117 dpcm_be_dai_hw_free(fe, stream); 2118 else 2119 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2120 2121 out: 2122 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2123 snd_soc_dpcm_mutex_unlock(fe); 2124 2125 return soc_pcm_ret(fe, ret); 2126 } 2127 2128 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2129 int cmd) 2130 { 2131 struct snd_soc_pcm_runtime *be; 2132 bool pause_stop_transition; 2133 struct snd_soc_dpcm *dpcm; 2134 unsigned long flags; 2135 int ret = 0; 2136 2137 for_each_dpcm_be(fe, stream, dpcm) { 2138 struct snd_pcm_substream *be_substream; 2139 2140 be = dpcm->be; 2141 be_substream = snd_soc_dpcm_get_substream(be, stream); 2142 2143 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); 2144 2145 /* is this op for this BE ? */ 2146 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2147 goto next; 2148 2149 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2150 be->dai_link->name, cmd); 2151 2152 switch (cmd) { 2153 case SNDRV_PCM_TRIGGER_START: 2154 if (!be->dpcm[stream].be_start && 2155 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2156 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2157 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2158 goto next; 2159 2160 be->dpcm[stream].be_start++; 2161 if (be->dpcm[stream].be_start != 1) 2162 goto next; 2163 2164 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2165 ret = soc_pcm_trigger(be_substream, 2166 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2167 else 2168 ret = soc_pcm_trigger(be_substream, 2169 SNDRV_PCM_TRIGGER_START); 2170 if (ret) { 2171 be->dpcm[stream].be_start--; 2172 goto next; 2173 } 2174 2175 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2176 break; 2177 case SNDRV_PCM_TRIGGER_RESUME: 2178 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2179 goto next; 2180 2181 be->dpcm[stream].be_start++; 2182 if (be->dpcm[stream].be_start != 1) 2183 goto next; 2184 2185 ret = soc_pcm_trigger(be_substream, cmd); 2186 if (ret) { 2187 be->dpcm[stream].be_start--; 2188 goto next; 2189 } 2190 2191 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2192 break; 2193 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2194 if (!be->dpcm[stream].be_start && 2195 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2196 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2197 goto next; 2198 2199 fe->dpcm[stream].fe_pause = false; 2200 be->dpcm[stream].be_pause--; 2201 2202 be->dpcm[stream].be_start++; 2203 if (be->dpcm[stream].be_start != 1) 2204 goto next; 2205 2206 ret = soc_pcm_trigger(be_substream, cmd); 2207 if (ret) { 2208 be->dpcm[stream].be_start--; 2209 goto next; 2210 } 2211 2212 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2213 break; 2214 case SNDRV_PCM_TRIGGER_STOP: 2215 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2216 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2217 goto next; 2218 2219 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2220 be->dpcm[stream].be_start--; 2221 2222 if (be->dpcm[stream].be_start != 0) 2223 goto next; 2224 2225 pause_stop_transition = false; 2226 if (fe->dpcm[stream].fe_pause) { 2227 pause_stop_transition = true; 2228 fe->dpcm[stream].fe_pause = false; 2229 be->dpcm[stream].be_pause--; 2230 } 2231 2232 if (be->dpcm[stream].be_pause != 0) 2233 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2234 else 2235 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2236 2237 if (ret) { 2238 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2239 be->dpcm[stream].be_start++; 2240 if (pause_stop_transition) { 2241 fe->dpcm[stream].fe_pause = true; 2242 be->dpcm[stream].be_pause++; 2243 } 2244 goto next; 2245 } 2246 2247 if (be->dpcm[stream].be_pause != 0) 2248 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2249 else 2250 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2251 2252 break; 2253 case SNDRV_PCM_TRIGGER_SUSPEND: 2254 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2255 goto next; 2256 2257 be->dpcm[stream].be_start--; 2258 if (be->dpcm[stream].be_start != 0) 2259 goto next; 2260 2261 ret = soc_pcm_trigger(be_substream, cmd); 2262 if (ret) { 2263 be->dpcm[stream].be_start++; 2264 goto next; 2265 } 2266 2267 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2268 break; 2269 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2270 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2271 goto next; 2272 2273 fe->dpcm[stream].fe_pause = true; 2274 be->dpcm[stream].be_pause++; 2275 2276 be->dpcm[stream].be_start--; 2277 if (be->dpcm[stream].be_start != 0) 2278 goto next; 2279 2280 ret = soc_pcm_trigger(be_substream, cmd); 2281 if (ret) { 2282 be->dpcm[stream].be_start++; 2283 goto next; 2284 } 2285 2286 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2287 break; 2288 } 2289 next: 2290 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2291 if (ret) 2292 break; 2293 } 2294 return soc_pcm_ret(fe, ret); 2295 } 2296 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2297 2298 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2299 int cmd, bool fe_first) 2300 { 2301 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2302 int ret; 2303 2304 /* call trigger on the frontend before the backend. */ 2305 if (fe_first) { 2306 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2307 fe->dai_link->name, cmd); 2308 2309 ret = soc_pcm_trigger(substream, cmd); 2310 if (ret < 0) 2311 return ret; 2312 2313 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2314 return ret; 2315 } 2316 2317 /* call trigger on the frontend after the backend. */ 2318 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2319 if (ret < 0) 2320 return ret; 2321 2322 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2323 fe->dai_link->name, cmd); 2324 2325 ret = soc_pcm_trigger(substream, cmd); 2326 2327 return ret; 2328 } 2329 2330 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2331 { 2332 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2333 int stream = substream->stream; 2334 int ret = 0; 2335 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2336 2337 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2338 2339 switch (trigger) { 2340 case SND_SOC_DPCM_TRIGGER_PRE: 2341 switch (cmd) { 2342 case SNDRV_PCM_TRIGGER_START: 2343 case SNDRV_PCM_TRIGGER_RESUME: 2344 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2345 case SNDRV_PCM_TRIGGER_DRAIN: 2346 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2347 break; 2348 case SNDRV_PCM_TRIGGER_STOP: 2349 case SNDRV_PCM_TRIGGER_SUSPEND: 2350 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2351 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2352 break; 2353 default: 2354 ret = -EINVAL; 2355 break; 2356 } 2357 break; 2358 case SND_SOC_DPCM_TRIGGER_POST: 2359 switch (cmd) { 2360 case SNDRV_PCM_TRIGGER_START: 2361 case SNDRV_PCM_TRIGGER_RESUME: 2362 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2363 case SNDRV_PCM_TRIGGER_DRAIN: 2364 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2365 break; 2366 case SNDRV_PCM_TRIGGER_STOP: 2367 case SNDRV_PCM_TRIGGER_SUSPEND: 2368 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2369 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2370 break; 2371 default: 2372 ret = -EINVAL; 2373 break; 2374 } 2375 break; 2376 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2377 /* bespoke trigger() - handles both FE and BEs */ 2378 2379 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2380 fe->dai_link->name, cmd); 2381 2382 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2383 break; 2384 default: 2385 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2386 fe->dai_link->name); 2387 ret = -EINVAL; 2388 goto out; 2389 } 2390 2391 if (ret < 0) { 2392 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2393 cmd, ret); 2394 goto out; 2395 } 2396 2397 switch (cmd) { 2398 case SNDRV_PCM_TRIGGER_START: 2399 case SNDRV_PCM_TRIGGER_RESUME: 2400 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2401 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2402 break; 2403 case SNDRV_PCM_TRIGGER_STOP: 2404 case SNDRV_PCM_TRIGGER_SUSPEND: 2405 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2406 break; 2407 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2408 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2409 break; 2410 } 2411 2412 out: 2413 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2414 return ret; 2415 } 2416 2417 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2418 { 2419 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2420 int stream = substream->stream; 2421 2422 /* if FE's runtime_update is already set, we're in race; 2423 * process this trigger later at exit 2424 */ 2425 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2426 fe->dpcm[stream].trigger_pending = cmd + 1; 2427 return 0; /* delayed, assuming it's successful */ 2428 } 2429 2430 /* we're alone, let's trigger */ 2431 return dpcm_fe_dai_do_trigger(substream, cmd); 2432 } 2433 2434 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2435 { 2436 struct snd_soc_dpcm *dpcm; 2437 int ret = 0; 2438 2439 for_each_dpcm_be(fe, stream, dpcm) { 2440 2441 struct snd_soc_pcm_runtime *be = dpcm->be; 2442 struct snd_pcm_substream *be_substream = 2443 snd_soc_dpcm_get_substream(be, stream); 2444 2445 /* is this op for this BE ? */ 2446 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2447 continue; 2448 2449 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream)) 2450 continue; 2451 2452 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2453 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2454 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2455 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2456 continue; 2457 2458 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2459 be->dai_link->name); 2460 2461 ret = __soc_pcm_prepare(be, be_substream); 2462 if (ret < 0) 2463 break; 2464 2465 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2466 } 2467 2468 return soc_pcm_ret(fe, ret); 2469 } 2470 2471 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2472 { 2473 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2474 int stream = substream->stream, ret = 0; 2475 2476 snd_soc_dpcm_mutex_lock(fe); 2477 2478 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2479 2480 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2481 2482 /* there is no point preparing this FE if there are no BEs */ 2483 if (list_empty(&fe->dpcm[stream].be_clients)) { 2484 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */ 2485 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n", 2486 fe->dai_link->name); 2487 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2488 fe->dai_link->name); 2489 ret = -EINVAL; 2490 goto out; 2491 } 2492 2493 ret = dpcm_be_dai_prepare(fe, stream); 2494 if (ret < 0) 2495 goto out; 2496 2497 /* call prepare on the frontend */ 2498 ret = __soc_pcm_prepare(fe, substream); 2499 if (ret < 0) 2500 goto out; 2501 2502 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2503 2504 out: 2505 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2506 snd_soc_dpcm_mutex_unlock(fe); 2507 2508 return soc_pcm_ret(fe, ret); 2509 } 2510 2511 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2512 { 2513 struct snd_pcm_substream *substream = 2514 snd_soc_dpcm_get_substream(fe, stream); 2515 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2516 int err; 2517 2518 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2519 stream ? "capture" : "playback", fe->dai_link->name); 2520 2521 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2522 /* call bespoke trigger - FE takes care of all BE triggers */ 2523 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2524 fe->dai_link->name); 2525 2526 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2527 } else { 2528 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2529 fe->dai_link->name); 2530 2531 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2532 } 2533 2534 dpcm_be_dai_hw_free(fe, stream); 2535 2536 dpcm_be_dai_shutdown(fe, stream); 2537 2538 /* run the stream event for each BE */ 2539 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2540 2541 return soc_pcm_ret(fe, err); 2542 } 2543 2544 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2545 { 2546 struct snd_pcm_substream *substream = 2547 snd_soc_dpcm_get_substream(fe, stream); 2548 struct snd_soc_dpcm *dpcm; 2549 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2550 int ret = 0; 2551 2552 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2553 stream ? "capture" : "playback", fe->dai_link->name); 2554 2555 /* Only start the BE if the FE is ready */ 2556 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2557 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2558 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2559 fe->dai_link->name, fe->dpcm[stream].state); 2560 ret = -EINVAL; 2561 goto disconnect; 2562 } 2563 2564 /* startup must always be called for new BEs */ 2565 ret = dpcm_be_dai_startup(fe, stream); 2566 if (ret < 0) 2567 goto disconnect; 2568 2569 /* keep going if FE state is > open */ 2570 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2571 return 0; 2572 2573 ret = dpcm_be_dai_hw_params(fe, stream); 2574 if (ret < 0) 2575 goto close; 2576 2577 /* keep going if FE state is > hw_params */ 2578 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2579 return 0; 2580 2581 ret = dpcm_be_dai_prepare(fe, stream); 2582 if (ret < 0) 2583 goto hw_free; 2584 2585 /* run the stream event for each BE */ 2586 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2587 2588 /* keep going if FE state is > prepare */ 2589 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2590 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2591 return 0; 2592 2593 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2594 /* call trigger on the frontend - FE takes care of all BE triggers */ 2595 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2596 fe->dai_link->name); 2597 2598 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2599 if (ret < 0) 2600 goto hw_free; 2601 } else { 2602 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2603 fe->dai_link->name); 2604 2605 ret = dpcm_be_dai_trigger(fe, stream, 2606 SNDRV_PCM_TRIGGER_START); 2607 if (ret < 0) 2608 goto hw_free; 2609 } 2610 2611 return 0; 2612 2613 hw_free: 2614 dpcm_be_dai_hw_free(fe, stream); 2615 close: 2616 dpcm_be_dai_shutdown(fe, stream); 2617 disconnect: 2618 /* disconnect any pending BEs */ 2619 for_each_dpcm_be(fe, stream, dpcm) { 2620 struct snd_soc_pcm_runtime *be = dpcm->be; 2621 2622 /* is this op for this BE ? */ 2623 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2624 continue; 2625 2626 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2627 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2628 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2629 } 2630 2631 return soc_pcm_ret(fe, ret); 2632 } 2633 2634 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2635 { 2636 struct snd_soc_dapm_widget_list *list; 2637 int stream; 2638 int count, paths; 2639 2640 if (!fe->dai_link->dynamic) 2641 return 0; 2642 2643 if (fe->dai_link->num_cpus > 1) { 2644 dev_err(fe->dev, 2645 "%s doesn't support Multi CPU yet\n", __func__); 2646 return -EINVAL; 2647 } 2648 2649 /* only check active links */ 2650 if (!snd_soc_dai_active(snd_soc_rtd_to_cpu(fe, 0))) 2651 return 0; 2652 2653 /* DAPM sync will call this to update DSP paths */ 2654 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2655 new ? "new" : "old", fe->dai_link->name); 2656 2657 for_each_pcm_streams(stream) { 2658 2659 /* skip if FE doesn't have playback/capture capability */ 2660 if (!snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream) || 2661 !snd_soc_dai_stream_valid(snd_soc_rtd_to_codec(fe, 0), stream)) 2662 continue; 2663 2664 /* skip if FE isn't currently playing/capturing */ 2665 if (!snd_soc_dai_stream_active(snd_soc_rtd_to_cpu(fe, 0), stream) || 2666 !snd_soc_dai_stream_active(snd_soc_rtd_to_codec(fe, 0), stream)) 2667 continue; 2668 2669 paths = dpcm_path_get(fe, stream, &list); 2670 if (paths < 0) 2671 return paths; 2672 2673 /* update any playback/capture paths */ 2674 count = dpcm_process_paths(fe, stream, &list, new); 2675 if (count) { 2676 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2677 if (new) 2678 dpcm_run_update_startup(fe, stream); 2679 else 2680 dpcm_run_update_shutdown(fe, stream); 2681 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2682 2683 dpcm_clear_pending_state(fe, stream); 2684 dpcm_be_disconnect(fe, stream); 2685 } 2686 2687 dpcm_path_put(&list); 2688 } 2689 2690 return 0; 2691 } 2692 2693 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2694 * any DAI links. 2695 */ 2696 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2697 { 2698 struct snd_soc_pcm_runtime *fe; 2699 int ret = 0; 2700 2701 snd_soc_dpcm_mutex_lock(card); 2702 /* shutdown all old paths first */ 2703 for_each_card_rtds(card, fe) { 2704 ret = soc_dpcm_fe_runtime_update(fe, 0); 2705 if (ret) 2706 goto out; 2707 } 2708 2709 /* bring new paths up */ 2710 for_each_card_rtds(card, fe) { 2711 ret = soc_dpcm_fe_runtime_update(fe, 1); 2712 if (ret) 2713 goto out; 2714 } 2715 2716 out: 2717 snd_soc_dpcm_mutex_unlock(card); 2718 return ret; 2719 } 2720 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2721 2722 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2723 { 2724 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2725 struct snd_soc_dpcm *dpcm; 2726 int stream = fe_substream->stream; 2727 2728 snd_soc_dpcm_mutex_assert_held(fe); 2729 2730 /* mark FE's links ready to prune */ 2731 for_each_dpcm_be(fe, stream, dpcm) 2732 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2733 2734 dpcm_be_disconnect(fe, stream); 2735 } 2736 2737 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2738 { 2739 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2740 int ret; 2741 2742 snd_soc_dpcm_mutex_lock(fe); 2743 ret = dpcm_fe_dai_shutdown(fe_substream); 2744 2745 dpcm_fe_dai_cleanup(fe_substream); 2746 2747 snd_soc_dpcm_mutex_unlock(fe); 2748 return ret; 2749 } 2750 2751 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2752 { 2753 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2754 struct snd_soc_dapm_widget_list *list; 2755 int ret; 2756 int stream = fe_substream->stream; 2757 2758 snd_soc_dpcm_mutex_lock(fe); 2759 2760 ret = dpcm_path_get(fe, stream, &list); 2761 if (ret < 0) 2762 goto open_end; 2763 2764 /* calculate valid and active FE <-> BE dpcms */ 2765 dpcm_process_paths(fe, stream, &list, 1); 2766 2767 ret = dpcm_fe_dai_startup(fe_substream); 2768 if (ret < 0) 2769 dpcm_fe_dai_cleanup(fe_substream); 2770 2771 dpcm_clear_pending_state(fe, stream); 2772 dpcm_path_put(&list); 2773 open_end: 2774 snd_soc_dpcm_mutex_unlock(fe); 2775 return ret; 2776 } 2777 2778 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2779 int *playback, int *capture) 2780 { 2781 struct snd_soc_dai_link *dai_link = rtd->dai_link; 2782 struct snd_soc_dai *cpu_dai; 2783 int has_playback = 0; 2784 int has_capture = 0; 2785 int i; 2786 2787 if (dai_link->dynamic && dai_link->num_cpus > 1) { 2788 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2789 return -EINVAL; 2790 } 2791 2792 if (dai_link->dynamic || dai_link->no_pcm) { 2793 int stream; 2794 2795 if (dai_link->dpcm_playback) { 2796 stream = SNDRV_PCM_STREAM_PLAYBACK; 2797 2798 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2799 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2800 has_playback = 1; 2801 break; 2802 } 2803 } 2804 if (!has_playback) { 2805 dev_err(rtd->card->dev, 2806 "No CPU DAIs support playback for stream %s\n", 2807 dai_link->stream_name); 2808 return -EINVAL; 2809 } 2810 } 2811 if (dai_link->dpcm_capture) { 2812 stream = SNDRV_PCM_STREAM_CAPTURE; 2813 2814 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2815 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2816 has_capture = 1; 2817 break; 2818 } 2819 } 2820 2821 if (!has_capture) { 2822 dev_err(rtd->card->dev, 2823 "No CPU DAIs support capture for stream %s\n", 2824 dai_link->stream_name); 2825 return -EINVAL; 2826 } 2827 } 2828 } else { 2829 struct snd_soc_dai *codec_dai; 2830 2831 /* Adapt stream for codec2codec links */ 2832 int cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE); 2833 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK); 2834 2835 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2836 if (dai_link->num_cpus == 1) { 2837 cpu_dai = snd_soc_rtd_to_cpu(rtd, 0); 2838 } else if (dai_link->num_cpus == dai_link->num_codecs) { 2839 cpu_dai = snd_soc_rtd_to_cpu(rtd, i); 2840 } else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) { 2841 int cpu_id; 2842 2843 if (!rtd->dai_link->codec_ch_maps) { 2844 dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n", 2845 __func__); 2846 return -EINVAL; 2847 } 2848 2849 cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id; 2850 cpu_dai = snd_soc_rtd_to_cpu(rtd, cpu_id); 2851 } else { 2852 dev_err(rtd->card->dev, 2853 "%s codec number %d < cpu number %d is not supported\n", 2854 __func__, rtd->dai_link->num_codecs, 2855 rtd->dai_link->num_cpus); 2856 return -EINVAL; 2857 } 2858 2859 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2860 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2861 has_playback = 1; 2862 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2863 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2864 has_capture = 1; 2865 } 2866 } 2867 2868 if (dai_link->playback_only) 2869 has_capture = 0; 2870 2871 if (dai_link->capture_only) 2872 has_playback = 0; 2873 2874 if (!has_playback && !has_capture) { 2875 dev_err(rtd->dev, "substream %s has no playback, no capture\n", 2876 dai_link->stream_name); 2877 2878 return -EINVAL; 2879 } 2880 2881 *playback = has_playback; 2882 *capture = has_capture; 2883 2884 return 0; 2885 } 2886 2887 static int soc_create_pcm(struct snd_pcm **pcm, 2888 struct snd_soc_pcm_runtime *rtd, 2889 int playback, int capture, int num) 2890 { 2891 char new_name[64]; 2892 int ret; 2893 2894 /* create the PCM */ 2895 if (rtd->dai_link->c2c_params) { 2896 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2897 rtd->dai_link->stream_name); 2898 2899 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2900 playback, capture, pcm); 2901 } else if (rtd->dai_link->no_pcm) { 2902 snprintf(new_name, sizeof(new_name), "(%s)", 2903 rtd->dai_link->stream_name); 2904 2905 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2906 playback, capture, pcm); 2907 } else { 2908 if (rtd->dai_link->dynamic) 2909 snprintf(new_name, sizeof(new_name), "%s (*)", 2910 rtd->dai_link->stream_name); 2911 else 2912 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2913 rtd->dai_link->stream_name, 2914 soc_codec_dai_name(rtd), num); 2915 2916 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2917 capture, pcm); 2918 } 2919 if (ret < 0) { 2920 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2921 new_name, rtd->dai_link->name, ret); 2922 return ret; 2923 } 2924 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2925 2926 return 0; 2927 } 2928 2929 /* create a new pcm */ 2930 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2931 { 2932 struct snd_soc_component *component; 2933 struct snd_pcm *pcm; 2934 int ret = 0, playback = 0, capture = 0; 2935 int i; 2936 2937 ret = soc_get_playback_capture(rtd, &playback, &capture); 2938 if (ret < 0) 2939 return ret; 2940 2941 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2942 if (ret < 0) 2943 return ret; 2944 2945 /* DAPM dai link stream work */ 2946 /* 2947 * Currently nothing to do for c2c links 2948 * Since c2c links are internal nodes in the DAPM graph and 2949 * don't interface with the outside world or application layer 2950 * we don't have to do any special handling on close. 2951 */ 2952 if (!rtd->dai_link->c2c_params) 2953 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2954 2955 rtd->pcm = pcm; 2956 pcm->nonatomic = rtd->dai_link->nonatomic; 2957 pcm->private_data = rtd; 2958 pcm->no_device_suspend = true; 2959 2960 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { 2961 if (playback) 2962 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2963 if (capture) 2964 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2965 goto out; 2966 } 2967 2968 /* ASoC PCM operations */ 2969 if (rtd->dai_link->dynamic) { 2970 rtd->ops.open = dpcm_fe_dai_open; 2971 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2972 rtd->ops.prepare = dpcm_fe_dai_prepare; 2973 rtd->ops.trigger = dpcm_fe_dai_trigger; 2974 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2975 rtd->ops.close = dpcm_fe_dai_close; 2976 rtd->ops.pointer = soc_pcm_pointer; 2977 } else { 2978 rtd->ops.open = soc_pcm_open; 2979 rtd->ops.hw_params = soc_pcm_hw_params; 2980 rtd->ops.prepare = soc_pcm_prepare; 2981 rtd->ops.trigger = soc_pcm_trigger; 2982 rtd->ops.hw_free = soc_pcm_hw_free; 2983 rtd->ops.close = soc_pcm_close; 2984 rtd->ops.pointer = soc_pcm_pointer; 2985 } 2986 2987 for_each_rtd_components(rtd, i, component) { 2988 const struct snd_soc_component_driver *drv = component->driver; 2989 2990 if (drv->ioctl) 2991 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2992 if (drv->sync_stop) 2993 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2994 if (drv->copy) 2995 rtd->ops.copy = snd_soc_pcm_component_copy; 2996 if (drv->page) 2997 rtd->ops.page = snd_soc_pcm_component_page; 2998 if (drv->mmap) 2999 rtd->ops.mmap = snd_soc_pcm_component_mmap; 3000 if (drv->ack) 3001 rtd->ops.ack = snd_soc_pcm_component_ack; 3002 } 3003 3004 if (playback) 3005 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 3006 3007 if (capture) 3008 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 3009 3010 ret = snd_soc_pcm_component_new(rtd); 3011 if (ret < 0) 3012 return ret; 3013 out: 3014 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 3015 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 3016 return ret; 3017 } 3018 3019 /* is the current PCM operation for this FE ? */ 3020 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 3021 { 3022 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 3023 return 1; 3024 return 0; 3025 } 3026 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 3027 3028 /* is the current PCM operation for this BE ? */ 3029 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 3030 struct snd_soc_pcm_runtime *be, int stream) 3031 { 3032 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 3033 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 3034 be->dpcm[stream].runtime_update)) 3035 return 1; 3036 return 0; 3037 } 3038 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 3039 3040 /* get the substream for this BE */ 3041 struct snd_pcm_substream * 3042 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3043 { 3044 return be->pcm->streams[stream].substream; 3045 } 3046 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3047 3048 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 3049 struct snd_soc_pcm_runtime *be, 3050 int stream, 3051 const enum snd_soc_dpcm_state *states, 3052 int num_states) 3053 { 3054 struct snd_soc_dpcm *dpcm; 3055 int state; 3056 int ret = 1; 3057 int i; 3058 3059 for_each_dpcm_fe(be, stream, dpcm) { 3060 3061 if (dpcm->fe == fe) 3062 continue; 3063 3064 state = dpcm->fe->dpcm[stream].state; 3065 for (i = 0; i < num_states; i++) { 3066 if (state == states[i]) { 3067 ret = 0; 3068 break; 3069 } 3070 } 3071 } 3072 3073 /* it's safe to do this BE DAI */ 3074 return ret; 3075 } 3076 3077 /* 3078 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3079 * are not running, paused or suspended for the specified stream direction. 3080 */ 3081 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3082 struct snd_soc_pcm_runtime *be, int stream) 3083 { 3084 const enum snd_soc_dpcm_state state[] = { 3085 SND_SOC_DPCM_STATE_START, 3086 SND_SOC_DPCM_STATE_PAUSED, 3087 SND_SOC_DPCM_STATE_SUSPEND, 3088 }; 3089 3090 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3091 } 3092 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3093 3094 /* 3095 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3096 * running, paused or suspended for the specified stream direction. 3097 */ 3098 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3099 struct snd_soc_pcm_runtime *be, int stream) 3100 { 3101 const enum snd_soc_dpcm_state state[] = { 3102 SND_SOC_DPCM_STATE_START, 3103 SND_SOC_DPCM_STATE_PAUSED, 3104 SND_SOC_DPCM_STATE_SUSPEND, 3105 SND_SOC_DPCM_STATE_PREPARE, 3106 }; 3107 3108 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3109 } 3110 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3111 3112 /* 3113 * We can only prepare a BE DAI if any of it's FE are not prepared, 3114 * running or paused for the specified stream direction. 3115 */ 3116 int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe, 3117 struct snd_soc_pcm_runtime *be, int stream) 3118 { 3119 const enum snd_soc_dpcm_state state[] = { 3120 SND_SOC_DPCM_STATE_START, 3121 SND_SOC_DPCM_STATE_PAUSED, 3122 SND_SOC_DPCM_STATE_PREPARE, 3123 }; 3124 3125 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3126 } 3127 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared); 3128