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