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/pm_runtime.h> 18 #include <linux/slab.h> 19 #include <linux/workqueue.h> 20 #include <linux/export.h> 21 #include <linux/debugfs.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/soc-dpcm.h> 27 #include <sound/soc-link.h> 28 #include <sound/initval.h> 29 30 #define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret) 31 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd, 32 const char *func, int ret) 33 { 34 /* Positive, Zero values are not errors */ 35 if (ret >= 0) 36 return ret; 37 38 /* Negative values might be errors */ 39 switch (ret) { 40 case -EPROBE_DEFER: 41 case -ENOTSUPP: 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_mutex_lock(struct snd_soc_pcm_runtime *rtd) 53 { 54 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 55 } 56 57 static inline void snd_soc_dpcm_mutex_unlock(struct snd_soc_pcm_runtime *rtd) 58 { 59 mutex_unlock(&rtd->card->pcm_mutex); 60 } 61 62 #define snd_soc_dpcm_mutex_assert_held(rtd) \ 63 lockdep_assert_held(&(rtd)->card->pcm_mutex) 64 65 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd, 66 int stream) 67 { 68 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 69 } 70 71 #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \ 72 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags) 73 74 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd, 75 int stream) 76 { 77 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 78 } 79 80 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \ 81 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags) 82 83 #define DPCM_MAX_BE_USERS 8 84 85 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 86 { 87 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 88 } 89 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 90 { 91 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 92 } 93 94 #ifdef CONFIG_DEBUG_FS 95 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 96 { 97 switch (state) { 98 case SND_SOC_DPCM_STATE_NEW: 99 return "new"; 100 case SND_SOC_DPCM_STATE_OPEN: 101 return "open"; 102 case SND_SOC_DPCM_STATE_HW_PARAMS: 103 return "hw_params"; 104 case SND_SOC_DPCM_STATE_PREPARE: 105 return "prepare"; 106 case SND_SOC_DPCM_STATE_START: 107 return "start"; 108 case SND_SOC_DPCM_STATE_STOP: 109 return "stop"; 110 case SND_SOC_DPCM_STATE_SUSPEND: 111 return "suspend"; 112 case SND_SOC_DPCM_STATE_PAUSED: 113 return "paused"; 114 case SND_SOC_DPCM_STATE_HW_FREE: 115 return "hw_free"; 116 case SND_SOC_DPCM_STATE_CLOSE: 117 return "close"; 118 } 119 120 return "unknown"; 121 } 122 123 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 124 int stream, char *buf, size_t size) 125 { 126 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 127 struct snd_soc_dpcm *dpcm; 128 ssize_t offset = 0; 129 130 /* FE state */ 131 offset += scnprintf(buf + offset, size - offset, 132 "[%s - %s]\n", fe->dai_link->name, 133 stream ? "Capture" : "Playback"); 134 135 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 136 dpcm_state_string(fe->dpcm[stream].state)); 137 138 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 139 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 140 offset += scnprintf(buf + offset, size - offset, 141 "Hardware Params: " 142 "Format = %s, Channels = %d, Rate = %d\n", 143 snd_pcm_format_name(params_format(params)), 144 params_channels(params), 145 params_rate(params)); 146 147 /* BEs state */ 148 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 149 150 if (list_empty(&fe->dpcm[stream].be_clients)) { 151 offset += scnprintf(buf + offset, size - offset, 152 " No active DSP links\n"); 153 goto out; 154 } 155 156 for_each_dpcm_be(fe, stream, dpcm) { 157 struct snd_soc_pcm_runtime *be = dpcm->be; 158 params = &be->dpcm[stream].hw_params; 159 160 offset += scnprintf(buf + offset, size - offset, 161 "- %s\n", be->dai_link->name); 162 163 offset += scnprintf(buf + offset, size - offset, 164 " State: %s\n", 165 dpcm_state_string(be->dpcm[stream].state)); 166 167 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 168 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 169 offset += scnprintf(buf + offset, size - offset, 170 " Hardware Params: " 171 "Format = %s, Channels = %d, Rate = %d\n", 172 snd_pcm_format_name(params_format(params)), 173 params_channels(params), 174 params_rate(params)); 175 } 176 out: 177 return offset; 178 } 179 180 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 181 size_t count, loff_t *ppos) 182 { 183 struct snd_soc_pcm_runtime *fe = file->private_data; 184 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 185 int stream; 186 char *buf; 187 188 if (fe->dai_link->num_cpus > 1) { 189 dev_err(fe->dev, 190 "%s doesn't support Multi CPU yet\n", __func__); 191 return -EINVAL; 192 } 193 194 buf = kmalloc(out_count, GFP_KERNEL); 195 if (!buf) 196 return -ENOMEM; 197 198 snd_soc_dpcm_mutex_lock(fe); 199 for_each_pcm_streams(stream) 200 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 201 offset += dpcm_show_state(fe, stream, 202 buf + offset, 203 out_count - offset); 204 snd_soc_dpcm_mutex_unlock(fe); 205 206 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 207 208 kfree(buf); 209 return ret; 210 } 211 212 static const struct file_operations dpcm_state_fops = { 213 .open = simple_open, 214 .read = dpcm_state_read_file, 215 .llseek = default_llseek, 216 }; 217 218 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 219 { 220 if (!rtd->dai_link->dynamic) 221 return; 222 223 if (!rtd->card->debugfs_card_root) 224 return; 225 226 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 227 rtd->card->debugfs_card_root); 228 229 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 230 rtd, &dpcm_state_fops); 231 } 232 233 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 234 { 235 char *name; 236 237 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 238 stream ? "capture" : "playback"); 239 if (name) { 240 dpcm->debugfs_state = debugfs_create_dir( 241 name, dpcm->fe->debugfs_dpcm_root); 242 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 243 &dpcm->state); 244 kfree(name); 245 } 246 } 247 248 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 249 { 250 debugfs_remove_recursive(dpcm->debugfs_state); 251 } 252 253 #else 254 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 255 int stream) 256 { 257 } 258 259 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 260 { 261 } 262 #endif 263 264 /* Set FE's runtime_update state; the state is protected via PCM stream lock 265 * for avoiding the race with trigger callback. 266 * If the state is unset and a trigger is pending while the previous operation, 267 * process the pending trigger action here. 268 */ 269 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 270 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 271 int stream, enum snd_soc_dpcm_update state) 272 { 273 struct snd_pcm_substream *substream = 274 snd_soc_dpcm_get_substream(fe, stream); 275 276 snd_soc_dpcm_stream_lock_irq(fe, stream); 277 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 278 dpcm_fe_dai_do_trigger(substream, 279 fe->dpcm[stream].trigger_pending - 1); 280 fe->dpcm[stream].trigger_pending = 0; 281 } 282 fe->dpcm[stream].runtime_update = state; 283 snd_soc_dpcm_stream_unlock_irq(fe, stream); 284 } 285 286 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 287 int stream, enum snd_soc_dpcm_update state) 288 { 289 be->dpcm[stream].runtime_update = state; 290 } 291 292 /** 293 * snd_soc_runtime_action() - Increment/Decrement active count for 294 * PCM runtime components 295 * @rtd: ASoC PCM runtime that is activated 296 * @stream: Direction of the PCM stream 297 * @action: Activate stream if 1. Deactivate if -1. 298 * 299 * Increments/Decrements the active count for all the DAIs and components 300 * attached to a PCM runtime. 301 * Should typically be called when a stream is opened. 302 * 303 * Must be called with the rtd->card->pcm_mutex being held 304 */ 305 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 306 int stream, int action) 307 { 308 struct snd_soc_dai *dai; 309 int i; 310 311 snd_soc_dpcm_mutex_assert_held(rtd); 312 313 for_each_rtd_dais(rtd, i, dai) 314 snd_soc_dai_action(dai, stream, action); 315 } 316 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 317 318 /** 319 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 320 * @rtd: The ASoC PCM runtime that should be checked. 321 * 322 * This function checks whether the power down delay should be ignored for a 323 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 324 * been configured to ignore the delay, or if none of the components benefits 325 * from having the delay. 326 */ 327 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 328 { 329 struct snd_soc_component *component; 330 bool ignore = true; 331 int i; 332 333 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 334 return true; 335 336 for_each_rtd_components(rtd, i, component) 337 ignore &= !component->driver->use_pmdown_time; 338 339 return ignore; 340 } 341 342 /** 343 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 344 * @substream: the pcm substream 345 * @hw: the hardware parameters 346 * 347 * Sets the substream runtime hardware parameters. 348 */ 349 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 350 const struct snd_pcm_hardware *hw) 351 { 352 substream->runtime->hw = *hw; 353 354 return 0; 355 } 356 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 357 358 /* DPCM stream event, send event to FE and all active BEs. */ 359 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 360 int event) 361 { 362 struct snd_soc_dpcm *dpcm; 363 364 snd_soc_dpcm_mutex_assert_held(fe); 365 366 for_each_dpcm_be(fe, dir, dpcm) { 367 368 struct snd_soc_pcm_runtime *be = dpcm->be; 369 370 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 371 be->dai_link->name, event, dir); 372 373 if ((event == SND_SOC_DAPM_STREAM_STOP) && 374 (be->dpcm[dir].users >= 1)) 375 continue; 376 377 snd_soc_dapm_stream_event(be, dir, event); 378 } 379 380 snd_soc_dapm_stream_event(fe, dir, event); 381 382 return 0; 383 } 384 385 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 386 struct snd_pcm_hw_params *params) 387 { 388 if (params) { 389 dai->rate = params_rate(params); 390 dai->channels = params_channels(params); 391 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 392 } else { 393 dai->rate = 0; 394 dai->channels = 0; 395 dai->sample_bits = 0; 396 } 397 } 398 399 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 400 struct snd_soc_dai *soc_dai) 401 { 402 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 403 int ret; 404 405 if (!snd_soc_dai_active(soc_dai)) 406 return 0; 407 408 #define __soc_pcm_apply_symmetry(name, NAME) \ 409 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 410 rtd->dai_link->symmetric_##name)) { \ 411 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 412 #name, soc_dai->name); \ 413 \ 414 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 415 SNDRV_PCM_HW_PARAM_##NAME,\ 416 soc_dai->name); \ 417 if (ret < 0) { \ 418 dev_err(soc_dai->dev, \ 419 "ASoC: Unable to apply %s constraint: %d\n",\ 420 #name, ret); \ 421 return ret; \ 422 } \ 423 } 424 425 __soc_pcm_apply_symmetry(rate, RATE); 426 __soc_pcm_apply_symmetry(channels, CHANNELS); 427 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 428 429 return 0; 430 } 431 432 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 433 struct snd_pcm_hw_params *params) 434 { 435 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 436 struct snd_soc_dai d; 437 struct snd_soc_dai *dai; 438 struct snd_soc_dai *cpu_dai; 439 unsigned int symmetry, i; 440 441 d.name = __func__; 442 soc_pcm_set_dai_params(&d, params); 443 444 #define __soc_pcm_params_symmetry(xxx) \ 445 symmetry = rtd->dai_link->symmetric_##xxx; \ 446 for_each_rtd_dais(rtd, i, dai) \ 447 symmetry |= dai->driver->symmetric_##xxx; \ 448 \ 449 if (symmetry) \ 450 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 451 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 452 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 453 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 454 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 455 return -EINVAL; \ 456 } 457 458 /* reject unmatched parameters when applying symmetry */ 459 __soc_pcm_params_symmetry(rate); 460 __soc_pcm_params_symmetry(channels); 461 __soc_pcm_params_symmetry(sample_bits); 462 463 return 0; 464 } 465 466 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 467 { 468 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 469 struct snd_soc_dai_link *link = rtd->dai_link; 470 struct snd_soc_dai *dai; 471 unsigned int symmetry, i; 472 473 symmetry = link->symmetric_rate || 474 link->symmetric_channels || 475 link->symmetric_sample_bits; 476 477 for_each_rtd_dais(rtd, i, dai) 478 symmetry = symmetry || 479 dai->driver->symmetric_rate || 480 dai->driver->symmetric_channels || 481 dai->driver->symmetric_sample_bits; 482 483 if (symmetry) 484 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 485 } 486 487 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 488 { 489 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 490 int ret; 491 492 if (!bits) 493 return; 494 495 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 496 if (ret != 0) 497 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 498 bits, ret); 499 } 500 501 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 502 { 503 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 504 struct snd_soc_dai *cpu_dai; 505 struct snd_soc_dai *codec_dai; 506 int stream = substream->stream; 507 int i; 508 unsigned int bits = 0, cpu_bits = 0; 509 510 for_each_rtd_codec_dais(rtd, i, codec_dai) { 511 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 512 513 if (pcm_codec->sig_bits == 0) { 514 bits = 0; 515 break; 516 } 517 bits = max(pcm_codec->sig_bits, bits); 518 } 519 520 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 521 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 522 523 if (pcm_cpu->sig_bits == 0) { 524 cpu_bits = 0; 525 break; 526 } 527 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 528 } 529 530 soc_pcm_set_msb(substream, bits); 531 soc_pcm_set_msb(substream, cpu_bits); 532 } 533 534 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 535 { 536 hw->rates = UINT_MAX; 537 hw->rate_min = 0; 538 hw->rate_max = UINT_MAX; 539 hw->channels_min = 0; 540 hw->channels_max = UINT_MAX; 541 hw->formats = ULLONG_MAX; 542 } 543 544 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 545 struct snd_soc_pcm_stream *p) 546 { 547 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 548 549 /* setup hw->rate_min/max via hw->rates first */ 550 snd_pcm_hw_limit_rates(hw); 551 552 /* update hw->rate_min/max by snd_soc_pcm_stream */ 553 hw->rate_min = max(hw->rate_min, p->rate_min); 554 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 555 } 556 557 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 558 struct snd_soc_pcm_stream *p) 559 { 560 hw->channels_min = max(hw->channels_min, p->channels_min); 561 hw->channels_max = min(hw->channels_max, p->channels_max); 562 } 563 564 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 565 struct snd_soc_pcm_stream *p) 566 { 567 hw->formats &= p->formats; 568 } 569 570 /** 571 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 572 * @rtd: ASoC PCM runtime 573 * @hw: PCM hardware parameters (output) 574 * @stream: Direction of the PCM stream 575 * 576 * Calculates the subset of stream parameters supported by all DAIs 577 * associated with the PCM stream. 578 */ 579 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 580 struct snd_pcm_hardware *hw, int stream) 581 { 582 struct snd_soc_dai *codec_dai; 583 struct snd_soc_dai *cpu_dai; 584 struct snd_soc_pcm_stream *codec_stream; 585 struct snd_soc_pcm_stream *cpu_stream; 586 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 587 int i; 588 589 soc_pcm_hw_init(hw); 590 591 /* first calculate min/max only for CPUs in the DAI link */ 592 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 593 594 /* 595 * Skip CPUs which don't support the current stream type. 596 * Otherwise, since the rate, channel, and format values will 597 * zero in that case, we would have no usable settings left, 598 * causing the resulting setup to fail. 599 */ 600 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 601 continue; 602 603 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 604 605 soc_pcm_hw_update_chan(hw, cpu_stream); 606 soc_pcm_hw_update_rate(hw, cpu_stream); 607 soc_pcm_hw_update_format(hw, cpu_stream); 608 } 609 cpu_chan_min = hw->channels_min; 610 cpu_chan_max = hw->channels_max; 611 612 /* second calculate min/max only for CODECs in the DAI link */ 613 for_each_rtd_codec_dais(rtd, i, codec_dai) { 614 615 /* 616 * Skip CODECs which don't support the current stream type. 617 * Otherwise, since the rate, channel, and format values will 618 * zero in that case, we would have no usable settings left, 619 * causing the resulting setup to fail. 620 */ 621 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 622 continue; 623 624 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 625 626 soc_pcm_hw_update_chan(hw, codec_stream); 627 soc_pcm_hw_update_rate(hw, codec_stream); 628 soc_pcm_hw_update_format(hw, codec_stream); 629 } 630 631 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 632 if (!hw->channels_min) 633 return -EINVAL; 634 635 /* 636 * chan min/max cannot be enforced if there are multiple CODEC DAIs 637 * connected to CPU DAI(s), use CPU DAI's directly and let 638 * channel allocation be fixed up later 639 */ 640 if (rtd->dai_link->num_codecs > 1) { 641 hw->channels_min = cpu_chan_min; 642 hw->channels_max = cpu_chan_max; 643 } 644 645 return 0; 646 } 647 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 648 649 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 650 { 651 struct snd_pcm_hardware *hw = &substream->runtime->hw; 652 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 653 u64 formats = hw->formats; 654 655 /* 656 * At least one CPU and one CODEC should match. Otherwise, we should 657 * have bailed out on a higher level, since there would be no CPU or 658 * CODEC to support the transfer direction in that case. 659 */ 660 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 661 662 if (formats) 663 hw->formats &= formats; 664 } 665 666 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 667 { 668 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 669 struct snd_soc_component *component; 670 int i, ret = 0; 671 672 for_each_rtd_components(rtd, i, component) { 673 ret = snd_soc_component_module_get_when_open(component, substream); 674 if (ret < 0) 675 break; 676 677 ret = snd_soc_component_open(component, substream); 678 if (ret < 0) 679 break; 680 } 681 682 return ret; 683 } 684 685 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 686 int rollback) 687 { 688 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 689 struct snd_soc_component *component; 690 int i, ret = 0; 691 692 for_each_rtd_components(rtd, i, component) { 693 int r = snd_soc_component_close(component, substream, rollback); 694 if (r < 0) 695 ret = r; /* use last ret */ 696 697 snd_soc_component_module_put_when_close(component, substream, rollback); 698 } 699 700 return ret; 701 } 702 703 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 704 struct snd_pcm_substream *substream, int rollback) 705 { 706 struct snd_soc_component *component; 707 struct snd_soc_dai *dai; 708 int i; 709 710 snd_soc_dpcm_mutex_assert_held(rtd); 711 712 if (!rollback) { 713 snd_soc_runtime_deactivate(rtd, substream->stream); 714 /* clear the corresponding DAIs parameters when going to be inactive */ 715 for_each_rtd_dais(rtd, i, dai) { 716 if (snd_soc_dai_active(dai) == 0) 717 soc_pcm_set_dai_params(dai, NULL); 718 719 if (snd_soc_dai_stream_active(dai, substream->stream) == 0) 720 snd_soc_dai_digital_mute(dai, 1, substream->stream); 721 } 722 } 723 724 for_each_rtd_dais(rtd, i, dai) 725 snd_soc_dai_shutdown(dai, substream, rollback); 726 727 snd_soc_link_shutdown(substream, rollback); 728 729 soc_pcm_components_close(substream, rollback); 730 731 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 732 733 for_each_rtd_components(rtd, i, component) 734 if (!snd_soc_component_active(component)) 735 pinctrl_pm_select_sleep_state(component->dev); 736 737 return 0; 738 } 739 740 /* 741 * Called by ALSA when a PCM substream is closed. Private data can be 742 * freed here. The cpu DAI, codec DAI, machine and components are also 743 * shutdown. 744 */ 745 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 746 struct snd_pcm_substream *substream) 747 { 748 return soc_pcm_clean(rtd, substream, 0); 749 } 750 751 /* PCM close ops for non-DPCM streams */ 752 static int soc_pcm_close(struct snd_pcm_substream *substream) 753 { 754 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 755 756 snd_soc_dpcm_mutex_lock(rtd); 757 __soc_pcm_close(rtd, substream); 758 snd_soc_dpcm_mutex_unlock(rtd); 759 return 0; 760 } 761 762 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 763 { 764 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 765 struct snd_pcm_hardware *hw = &substream->runtime->hw; 766 const char *name_cpu = soc_cpu_dai_name(rtd); 767 const char *name_codec = soc_codec_dai_name(rtd); 768 const char *err_msg; 769 struct device *dev = rtd->dev; 770 771 err_msg = "rates"; 772 if (!hw->rates) 773 goto config_err; 774 775 err_msg = "formats"; 776 if (!hw->formats) 777 goto config_err; 778 779 err_msg = "channels"; 780 if (!hw->channels_min || !hw->channels_max || 781 hw->channels_min > hw->channels_max) 782 goto config_err; 783 784 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 785 name_cpu); 786 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 787 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 788 hw->channels_max); 789 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 790 hw->rate_max); 791 792 return 0; 793 794 config_err: 795 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 796 name_codec, name_cpu, err_msg); 797 return -EINVAL; 798 } 799 800 /* 801 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 802 * then initialized and any private data can be allocated. This also calls 803 * startup for the cpu DAI, component, machine and codec DAI. 804 */ 805 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 806 struct snd_pcm_substream *substream) 807 { 808 struct snd_soc_component *component; 809 struct snd_soc_dai *dai; 810 int i, ret = 0; 811 812 snd_soc_dpcm_mutex_assert_held(rtd); 813 814 for_each_rtd_components(rtd, i, component) 815 pinctrl_pm_select_default_state(component->dev); 816 817 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 818 if (ret < 0) 819 goto err; 820 821 ret = soc_pcm_components_open(substream); 822 if (ret < 0) 823 goto err; 824 825 ret = snd_soc_link_startup(substream); 826 if (ret < 0) 827 goto err; 828 829 /* startup the audio subsystem */ 830 for_each_rtd_dais(rtd, i, dai) { 831 ret = snd_soc_dai_startup(dai, substream); 832 if (ret < 0) 833 goto err; 834 } 835 836 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 837 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 838 goto dynamic; 839 840 /* Check that the codec and cpu DAIs are compatible */ 841 soc_pcm_init_runtime_hw(substream); 842 843 soc_pcm_update_symmetry(substream); 844 845 ret = soc_hw_sanity_check(substream); 846 if (ret < 0) 847 goto err; 848 849 soc_pcm_apply_msb(substream); 850 851 /* Symmetry only applies if we've already got an active stream. */ 852 for_each_rtd_dais(rtd, i, dai) { 853 ret = soc_pcm_apply_symmetry(substream, dai); 854 if (ret != 0) 855 goto err; 856 } 857 dynamic: 858 snd_soc_runtime_activate(rtd, substream->stream); 859 ret = 0; 860 err: 861 if (ret < 0) 862 soc_pcm_clean(rtd, substream, 1); 863 864 return soc_pcm_ret(rtd, ret); 865 } 866 867 /* PCM open ops for non-DPCM streams */ 868 static int soc_pcm_open(struct snd_pcm_substream *substream) 869 { 870 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 871 int ret; 872 873 snd_soc_dpcm_mutex_lock(rtd); 874 ret = __soc_pcm_open(rtd, substream); 875 snd_soc_dpcm_mutex_unlock(rtd); 876 return ret; 877 } 878 879 /* 880 * Called by ALSA when the PCM substream is prepared, can set format, sample 881 * rate, etc. This function is non atomic and can be called multiple times, 882 * it can refer to the runtime info. 883 */ 884 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 885 struct snd_pcm_substream *substream) 886 { 887 struct snd_soc_dai *dai; 888 int i, ret = 0; 889 890 snd_soc_dpcm_mutex_assert_held(rtd); 891 892 ret = snd_soc_link_prepare(substream); 893 if (ret < 0) 894 goto out; 895 896 ret = snd_soc_pcm_component_prepare(substream); 897 if (ret < 0) 898 goto out; 899 900 ret = snd_soc_pcm_dai_prepare(substream); 901 if (ret < 0) 902 goto out; 903 904 /* cancel any delayed stream shutdown that is pending */ 905 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 906 rtd->pop_wait) { 907 rtd->pop_wait = 0; 908 cancel_delayed_work(&rtd->delayed_work); 909 } 910 911 snd_soc_dapm_stream_event(rtd, substream->stream, 912 SND_SOC_DAPM_STREAM_START); 913 914 for_each_rtd_dais(rtd, i, dai) 915 snd_soc_dai_digital_mute(dai, 0, substream->stream); 916 917 out: 918 return soc_pcm_ret(rtd, ret); 919 } 920 921 /* PCM prepare ops for non-DPCM streams */ 922 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 923 { 924 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 925 int ret; 926 927 snd_soc_dpcm_mutex_lock(rtd); 928 ret = __soc_pcm_prepare(rtd, substream); 929 snd_soc_dpcm_mutex_unlock(rtd); 930 return ret; 931 } 932 933 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 934 unsigned int mask) 935 { 936 struct snd_interval *interval; 937 int channels = hweight_long(mask); 938 939 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 940 interval->min = channels; 941 interval->max = channels; 942 } 943 944 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 945 struct snd_pcm_substream *substream, int rollback) 946 { 947 struct snd_soc_dai *dai; 948 int i; 949 950 snd_soc_dpcm_mutex_assert_held(rtd); 951 952 /* run the stream event */ 953 snd_soc_dapm_stream_stop(rtd, substream->stream); 954 955 /* free any machine hw params */ 956 snd_soc_link_hw_free(substream, rollback); 957 958 /* free any component resources */ 959 snd_soc_pcm_component_hw_free(substream, rollback); 960 961 /* now free hw params for the DAIs */ 962 for_each_rtd_dais(rtd, i, dai) 963 if (snd_soc_dai_stream_valid(dai, substream->stream)) 964 snd_soc_dai_hw_free(dai, substream, rollback); 965 966 return 0; 967 } 968 969 /* 970 * Frees resources allocated by hw_params, can be called multiple times 971 */ 972 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 973 struct snd_pcm_substream *substream) 974 { 975 return soc_pcm_hw_clean(rtd, substream, 0); 976 } 977 978 /* hw_free PCM ops for non-DPCM streams */ 979 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 980 { 981 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 982 int ret; 983 984 snd_soc_dpcm_mutex_lock(rtd); 985 ret = __soc_pcm_hw_free(rtd, substream); 986 snd_soc_dpcm_mutex_unlock(rtd); 987 return ret; 988 } 989 990 /* 991 * Called by ALSA when the hardware params are set by application. This 992 * function can also be called multiple times and can allocate buffers 993 * (using snd_pcm_lib_* ). It's non-atomic. 994 */ 995 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, 996 struct snd_pcm_substream *substream, 997 struct snd_pcm_hw_params *params) 998 { 999 struct snd_soc_dai *cpu_dai; 1000 struct snd_soc_dai *codec_dai; 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 struct snd_pcm_hw_params codec_params; 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 codec_params = *params; 1035 1036 /* fixup params based on TDM slot masks */ 1037 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1038 codec_dai->tx_mask) 1039 soc_pcm_codec_params_fixup(&codec_params, 1040 codec_dai->tx_mask); 1041 1042 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 1043 codec_dai->rx_mask) 1044 soc_pcm_codec_params_fixup(&codec_params, 1045 codec_dai->rx_mask); 1046 1047 ret = snd_soc_dai_hw_params(codec_dai, substream, 1048 &codec_params); 1049 if(ret < 0) 1050 goto out; 1051 1052 soc_pcm_set_dai_params(codec_dai, &codec_params); 1053 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 1054 } 1055 1056 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1057 /* 1058 * Skip CPUs which don't support the current stream 1059 * type. See soc_pcm_init_runtime_hw() for more details 1060 */ 1061 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1062 continue; 1063 1064 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 1065 if (ret < 0) 1066 goto out; 1067 1068 /* store the parameters for each DAI */ 1069 soc_pcm_set_dai_params(cpu_dai, params); 1070 snd_soc_dapm_update_dai(substream, params, cpu_dai); 1071 } 1072 1073 ret = snd_soc_pcm_component_hw_params(substream, params); 1074 out: 1075 if (ret < 0) 1076 soc_pcm_hw_clean(rtd, substream, 1); 1077 1078 return soc_pcm_ret(rtd, ret); 1079 } 1080 1081 /* hw_params PCM ops for non-DPCM streams */ 1082 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1083 struct snd_pcm_hw_params *params) 1084 { 1085 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1086 int ret; 1087 1088 snd_soc_dpcm_mutex_lock(rtd); 1089 ret = __soc_pcm_hw_params(rtd, substream, params); 1090 snd_soc_dpcm_mutex_unlock(rtd); 1091 return ret; 1092 } 1093 1094 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1095 { 1096 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1097 int ret = -EINVAL, _ret = 0; 1098 int rollback = 0; 1099 1100 switch (cmd) { 1101 case SNDRV_PCM_TRIGGER_START: 1102 case SNDRV_PCM_TRIGGER_RESUME: 1103 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1104 ret = snd_soc_link_trigger(substream, cmd, 0); 1105 if (ret < 0) 1106 goto start_err; 1107 1108 ret = snd_soc_pcm_component_trigger(substream, cmd, 0); 1109 if (ret < 0) 1110 goto start_err; 1111 1112 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); 1113 start_err: 1114 if (ret < 0) 1115 rollback = 1; 1116 } 1117 1118 if (rollback) { 1119 _ret = ret; 1120 switch (cmd) { 1121 case SNDRV_PCM_TRIGGER_START: 1122 cmd = SNDRV_PCM_TRIGGER_STOP; 1123 break; 1124 case SNDRV_PCM_TRIGGER_RESUME: 1125 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1126 break; 1127 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1128 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1129 break; 1130 } 1131 } 1132 1133 switch (cmd) { 1134 case SNDRV_PCM_TRIGGER_STOP: 1135 case SNDRV_PCM_TRIGGER_SUSPEND: 1136 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1137 if (rtd->dai_link->stop_dma_first) { 1138 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1139 if (ret < 0) 1140 break; 1141 1142 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1143 if (ret < 0) 1144 break; 1145 } else { 1146 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1147 if (ret < 0) 1148 break; 1149 1150 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1151 if (ret < 0) 1152 break; 1153 } 1154 ret = snd_soc_link_trigger(substream, cmd, rollback); 1155 break; 1156 } 1157 1158 if (_ret) 1159 ret = _ret; 1160 1161 return ret; 1162 } 1163 1164 /* 1165 * soc level wrapper for pointer callback 1166 * If cpu_dai, codec_dai, component driver has the delay callback, then 1167 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1168 */ 1169 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1170 { 1171 struct snd_pcm_runtime *runtime = substream->runtime; 1172 snd_pcm_uframes_t offset = 0; 1173 snd_pcm_sframes_t codec_delay = 0; 1174 snd_pcm_sframes_t cpu_delay = 0; 1175 1176 offset = snd_soc_pcm_component_pointer(substream); 1177 1178 /* should be called *after* snd_soc_pcm_component_pointer() */ 1179 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1180 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1181 1182 runtime->delay = cpu_delay + codec_delay; 1183 1184 return offset; 1185 } 1186 1187 /* connect a FE and BE */ 1188 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1189 struct snd_soc_pcm_runtime *be, int stream) 1190 { 1191 struct snd_pcm_substream *fe_substream; 1192 struct snd_pcm_substream *be_substream; 1193 struct snd_soc_dpcm *dpcm; 1194 1195 snd_soc_dpcm_mutex_assert_held(fe); 1196 1197 /* only add new dpcms */ 1198 for_each_dpcm_be(fe, stream, dpcm) { 1199 if (dpcm->be == be && dpcm->fe == fe) 1200 return 0; 1201 } 1202 1203 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1204 be_substream = snd_soc_dpcm_get_substream(be, stream); 1205 1206 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { 1207 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", 1208 __func__); 1209 return -EINVAL; 1210 } 1211 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1212 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1213 be_substream->pcm->nonatomic = 1; 1214 } 1215 1216 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1217 if (!dpcm) 1218 return -ENOMEM; 1219 1220 dpcm->be = be; 1221 dpcm->fe = fe; 1222 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1223 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1224 snd_soc_dpcm_stream_lock_irq(fe, stream); 1225 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1226 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1227 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1228 1229 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1230 stream ? "capture" : "playback", fe->dai_link->name, 1231 stream ? "<-" : "->", be->dai_link->name); 1232 1233 dpcm_create_debugfs_state(dpcm, stream); 1234 1235 return 1; 1236 } 1237 1238 /* reparent a BE onto another FE */ 1239 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1240 struct snd_soc_pcm_runtime *be, int stream) 1241 { 1242 struct snd_soc_dpcm *dpcm; 1243 struct snd_pcm_substream *fe_substream, *be_substream; 1244 1245 /* reparent if BE is connected to other FEs */ 1246 if (!be->dpcm[stream].users) 1247 return; 1248 1249 be_substream = snd_soc_dpcm_get_substream(be, stream); 1250 if (!be_substream) 1251 return; 1252 1253 for_each_dpcm_fe(be, stream, dpcm) { 1254 if (dpcm->fe == fe) 1255 continue; 1256 1257 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1258 stream ? "capture" : "playback", 1259 dpcm->fe->dai_link->name, 1260 stream ? "<-" : "->", dpcm->be->dai_link->name); 1261 1262 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1263 be_substream->runtime = fe_substream->runtime; 1264 break; 1265 } 1266 } 1267 1268 /* disconnect a BE and FE */ 1269 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1270 { 1271 struct snd_soc_dpcm *dpcm, *d; 1272 LIST_HEAD(deleted_dpcms); 1273 1274 snd_soc_dpcm_mutex_assert_held(fe); 1275 1276 snd_soc_dpcm_stream_lock_irq(fe, stream); 1277 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1278 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1279 stream ? "capture" : "playback", 1280 dpcm->be->dai_link->name); 1281 1282 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1283 continue; 1284 1285 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1286 stream ? "capture" : "playback", fe->dai_link->name, 1287 stream ? "<-" : "->", dpcm->be->dai_link->name); 1288 1289 /* BEs still alive need new FE */ 1290 dpcm_be_reparent(fe, dpcm->be, stream); 1291 1292 list_del(&dpcm->list_be); 1293 list_move(&dpcm->list_fe, &deleted_dpcms); 1294 } 1295 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1296 1297 while (!list_empty(&deleted_dpcms)) { 1298 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1299 list_fe); 1300 list_del(&dpcm->list_fe); 1301 dpcm_remove_debugfs_state(dpcm); 1302 kfree(dpcm); 1303 } 1304 } 1305 1306 /* get BE for DAI widget and stream */ 1307 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1308 struct snd_soc_dapm_widget *widget, int stream) 1309 { 1310 struct snd_soc_pcm_runtime *be; 1311 struct snd_soc_dapm_widget *w; 1312 struct snd_soc_dai *dai; 1313 int i; 1314 1315 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1316 1317 for_each_card_rtds(card, be) { 1318 1319 if (!be->dai_link->no_pcm) 1320 continue; 1321 1322 if (!snd_soc_dpcm_get_substream(be, stream)) 1323 continue; 1324 1325 for_each_rtd_dais(be, i, dai) { 1326 w = snd_soc_dai_get_widget(dai, stream); 1327 1328 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1329 w ? w->name : "(not set)"); 1330 1331 if (w == widget) 1332 return be; 1333 } 1334 } 1335 1336 /* Widget provided is not a BE */ 1337 return NULL; 1338 } 1339 1340 int widget_in_list(struct snd_soc_dapm_widget_list *list, 1341 struct snd_soc_dapm_widget *widget) 1342 { 1343 struct snd_soc_dapm_widget *w; 1344 int i; 1345 1346 for_each_dapm_widgets(list, i, w) 1347 if (widget == w) 1348 return 1; 1349 1350 return 0; 1351 } 1352 EXPORT_SYMBOL_GPL(widget_in_list); 1353 1354 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1355 { 1356 struct snd_soc_card *card = widget->dapm->card; 1357 struct snd_soc_pcm_runtime *rtd; 1358 int stream; 1359 1360 /* adjust dir to stream */ 1361 if (dir == SND_SOC_DAPM_DIR_OUT) 1362 stream = SNDRV_PCM_STREAM_PLAYBACK; 1363 else 1364 stream = SNDRV_PCM_STREAM_CAPTURE; 1365 1366 rtd = dpcm_get_be(card, widget, stream); 1367 if (rtd) 1368 return true; 1369 1370 return false; 1371 } 1372 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1373 1374 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1375 int stream, struct snd_soc_dapm_widget_list **list) 1376 { 1377 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1378 int paths; 1379 1380 if (fe->dai_link->num_cpus > 1) { 1381 dev_err(fe->dev, 1382 "%s doesn't support Multi CPU yet\n", __func__); 1383 return -EINVAL; 1384 } 1385 1386 /* get number of valid DAI paths and their widgets */ 1387 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1388 fe->card->component_chaining ? 1389 NULL : dpcm_end_walk_at_be); 1390 1391 if (paths > 0) 1392 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1393 stream ? "capture" : "playback"); 1394 else if (paths == 0) 1395 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1396 stream ? "capture" : "playback"); 1397 1398 return paths; 1399 } 1400 1401 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1402 { 1403 snd_soc_dapm_dai_free_widgets(list); 1404 } 1405 1406 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1407 struct snd_soc_dapm_widget_list *list) 1408 { 1409 struct snd_soc_dai *dai; 1410 unsigned int i; 1411 1412 /* is there a valid DAI widget for this BE */ 1413 for_each_rtd_dais(dpcm->be, i, dai) { 1414 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1415 1416 /* 1417 * The BE is pruned only if none of the dai 1418 * widgets are in the active list. 1419 */ 1420 if (widget && widget_in_list(list, widget)) 1421 return true; 1422 } 1423 1424 return false; 1425 } 1426 1427 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1428 struct snd_soc_dapm_widget_list **list_) 1429 { 1430 struct snd_soc_dpcm *dpcm; 1431 int prune = 0; 1432 1433 /* Destroy any old FE <--> BE connections */ 1434 for_each_dpcm_be(fe, stream, dpcm) { 1435 if (dpcm_be_is_active(dpcm, stream, *list_)) 1436 continue; 1437 1438 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1439 stream ? "capture" : "playback", 1440 dpcm->be->dai_link->name, fe->dai_link->name); 1441 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1442 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1443 prune++; 1444 } 1445 1446 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1447 return prune; 1448 } 1449 1450 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1451 struct snd_soc_dapm_widget_list **list_) 1452 { 1453 struct snd_soc_card *card = fe->card; 1454 struct snd_soc_dapm_widget_list *list = *list_; 1455 struct snd_soc_pcm_runtime *be; 1456 struct snd_soc_dapm_widget *widget; 1457 int i, new = 0, err; 1458 1459 /* don't connect if FE is not running */ 1460 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1461 return new; 1462 1463 /* Create any new FE <--> BE connections */ 1464 for_each_dapm_widgets(list, i, widget) { 1465 1466 switch (widget->id) { 1467 case snd_soc_dapm_dai_in: 1468 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1469 continue; 1470 break; 1471 case snd_soc_dapm_dai_out: 1472 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1473 continue; 1474 break; 1475 default: 1476 continue; 1477 } 1478 1479 /* is there a valid BE rtd for this widget */ 1480 be = dpcm_get_be(card, widget, stream); 1481 if (!be) { 1482 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1483 widget->name); 1484 continue; 1485 } 1486 1487 /* 1488 * Filter for systems with 'component_chaining' enabled. 1489 * This helps to avoid unnecessary re-configuration of an 1490 * already active BE on such systems. 1491 */ 1492 if (fe->card->component_chaining && 1493 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1494 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1495 continue; 1496 1497 /* newly connected FE and BE */ 1498 err = dpcm_be_connect(fe, be, stream); 1499 if (err < 0) { 1500 dev_err(fe->dev, "ASoC: can't connect %s\n", 1501 widget->name); 1502 break; 1503 } else if (err == 0) /* already connected */ 1504 continue; 1505 1506 /* new */ 1507 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1508 new++; 1509 } 1510 1511 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1512 return new; 1513 } 1514 1515 /* 1516 * Find the corresponding BE DAIs that source or sink audio to this 1517 * FE substream. 1518 */ 1519 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1520 int stream, struct snd_soc_dapm_widget_list **list, int new) 1521 { 1522 if (new) 1523 return dpcm_add_paths(fe, stream, list); 1524 else 1525 return dpcm_prune_paths(fe, stream, list); 1526 } 1527 1528 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1529 { 1530 struct snd_soc_dpcm *dpcm; 1531 1532 for_each_dpcm_be(fe, stream, dpcm) 1533 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1534 } 1535 1536 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1537 int do_hw_free, struct snd_soc_dpcm *last) 1538 { 1539 struct snd_soc_dpcm *dpcm; 1540 1541 /* disable any enabled and non active backends */ 1542 for_each_dpcm_be(fe, stream, dpcm) { 1543 struct snd_soc_pcm_runtime *be = dpcm->be; 1544 struct snd_pcm_substream *be_substream = 1545 snd_soc_dpcm_get_substream(be, stream); 1546 1547 if (dpcm == last) 1548 return; 1549 1550 /* is this op for this BE ? */ 1551 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1552 continue; 1553 1554 if (be->dpcm[stream].users == 0) { 1555 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1556 stream ? "capture" : "playback", 1557 be->dpcm[stream].state); 1558 continue; 1559 } 1560 1561 if (--be->dpcm[stream].users != 0) 1562 continue; 1563 1564 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1565 if (!do_hw_free) 1566 continue; 1567 1568 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1569 __soc_pcm_hw_free(be, be_substream); 1570 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1571 } 1572 } 1573 1574 __soc_pcm_close(be, be_substream); 1575 be_substream->runtime = NULL; 1576 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1577 } 1578 } 1579 1580 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1581 { 1582 struct snd_soc_pcm_runtime *be; 1583 struct snd_soc_dpcm *dpcm; 1584 int err, count = 0; 1585 1586 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1587 for_each_dpcm_be(fe, stream, dpcm) { 1588 struct snd_pcm_substream *be_substream; 1589 1590 be = dpcm->be; 1591 be_substream = snd_soc_dpcm_get_substream(be, stream); 1592 1593 if (!be_substream) { 1594 dev_err(be->dev, "ASoC: no backend %s stream\n", 1595 stream ? "capture" : "playback"); 1596 continue; 1597 } 1598 1599 /* is this op for this BE ? */ 1600 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1601 continue; 1602 1603 /* first time the dpcm is open ? */ 1604 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1605 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1606 stream ? "capture" : "playback", 1607 be->dpcm[stream].state); 1608 continue; 1609 } 1610 1611 if (be->dpcm[stream].users++ != 0) 1612 continue; 1613 1614 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1615 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1616 continue; 1617 1618 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1619 stream ? "capture" : "playback", be->dai_link->name); 1620 1621 be_substream->runtime = be->dpcm[stream].runtime; 1622 err = __soc_pcm_open(be, be_substream); 1623 if (err < 0) { 1624 be->dpcm[stream].users--; 1625 if (be->dpcm[stream].users < 0) 1626 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1627 stream ? "capture" : "playback", 1628 be->dpcm[stream].state); 1629 1630 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1631 goto unwind; 1632 } 1633 be->dpcm[stream].be_start = 0; 1634 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1635 count++; 1636 } 1637 1638 return count; 1639 1640 unwind: 1641 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1642 1643 return soc_pcm_ret(fe, err); 1644 } 1645 1646 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1647 { 1648 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1649 struct snd_pcm_runtime *runtime = substream->runtime; 1650 struct snd_pcm_hardware *hw = &runtime->hw; 1651 struct snd_soc_dai *dai; 1652 int stream = substream->stream; 1653 int i; 1654 1655 soc_pcm_hw_init(hw); 1656 1657 for_each_rtd_cpu_dais(fe, i, dai) { 1658 struct snd_soc_pcm_stream *cpu_stream; 1659 1660 /* 1661 * Skip CPUs which don't support the current stream 1662 * type. See soc_pcm_init_runtime_hw() for more details 1663 */ 1664 if (!snd_soc_dai_stream_valid(dai, stream)) 1665 continue; 1666 1667 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1668 1669 soc_pcm_hw_update_rate(hw, cpu_stream); 1670 soc_pcm_hw_update_chan(hw, cpu_stream); 1671 soc_pcm_hw_update_format(hw, cpu_stream); 1672 } 1673 1674 } 1675 1676 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1677 { 1678 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1679 struct snd_pcm_runtime *runtime = substream->runtime; 1680 struct snd_pcm_hardware *hw = &runtime->hw; 1681 struct snd_soc_dpcm *dpcm; 1682 struct snd_soc_dai *dai; 1683 int stream = substream->stream; 1684 1685 if (!fe->dai_link->dpcm_merged_format) 1686 return; 1687 1688 /* 1689 * It returns merged BE codec format 1690 * if FE want to use it (= dpcm_merged_format) 1691 */ 1692 1693 for_each_dpcm_be(fe, stream, dpcm) { 1694 struct snd_soc_pcm_runtime *be = dpcm->be; 1695 struct snd_soc_pcm_stream *codec_stream; 1696 int i; 1697 1698 for_each_rtd_codec_dais(be, i, dai) { 1699 /* 1700 * Skip CODECs which don't support the current stream 1701 * type. See soc_pcm_init_runtime_hw() for more details 1702 */ 1703 if (!snd_soc_dai_stream_valid(dai, stream)) 1704 continue; 1705 1706 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1707 1708 soc_pcm_hw_update_format(hw, codec_stream); 1709 } 1710 } 1711 } 1712 1713 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1714 { 1715 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1716 struct snd_pcm_runtime *runtime = substream->runtime; 1717 struct snd_pcm_hardware *hw = &runtime->hw; 1718 struct snd_soc_dpcm *dpcm; 1719 int stream = substream->stream; 1720 1721 if (!fe->dai_link->dpcm_merged_chan) 1722 return; 1723 1724 /* 1725 * It returns merged BE codec channel; 1726 * if FE want to use it (= dpcm_merged_chan) 1727 */ 1728 1729 for_each_dpcm_be(fe, stream, dpcm) { 1730 struct snd_soc_pcm_runtime *be = dpcm->be; 1731 struct snd_soc_pcm_stream *cpu_stream; 1732 struct snd_soc_dai *dai; 1733 int i; 1734 1735 for_each_rtd_cpu_dais(be, i, dai) { 1736 /* 1737 * Skip CPUs which don't support the current stream 1738 * type. See soc_pcm_init_runtime_hw() for more details 1739 */ 1740 if (!snd_soc_dai_stream_valid(dai, stream)) 1741 continue; 1742 1743 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1744 1745 soc_pcm_hw_update_chan(hw, cpu_stream); 1746 } 1747 1748 /* 1749 * chan min/max cannot be enforced if there are multiple CODEC 1750 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1751 */ 1752 if (be->dai_link->num_codecs == 1) { 1753 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1754 asoc_rtd_to_codec(be, 0), stream); 1755 1756 soc_pcm_hw_update_chan(hw, codec_stream); 1757 } 1758 } 1759 } 1760 1761 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1762 { 1763 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1764 struct snd_pcm_runtime *runtime = substream->runtime; 1765 struct snd_pcm_hardware *hw = &runtime->hw; 1766 struct snd_soc_dpcm *dpcm; 1767 int stream = substream->stream; 1768 1769 if (!fe->dai_link->dpcm_merged_rate) 1770 return; 1771 1772 /* 1773 * It returns merged BE codec channel; 1774 * if FE want to use it (= dpcm_merged_chan) 1775 */ 1776 1777 for_each_dpcm_be(fe, stream, dpcm) { 1778 struct snd_soc_pcm_runtime *be = dpcm->be; 1779 struct snd_soc_pcm_stream *pcm; 1780 struct snd_soc_dai *dai; 1781 int i; 1782 1783 for_each_rtd_dais(be, i, dai) { 1784 /* 1785 * Skip DAIs which don't support the current stream 1786 * type. See soc_pcm_init_runtime_hw() for more details 1787 */ 1788 if (!snd_soc_dai_stream_valid(dai, stream)) 1789 continue; 1790 1791 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1792 1793 soc_pcm_hw_update_rate(hw, pcm); 1794 } 1795 } 1796 } 1797 1798 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1799 int stream) 1800 { 1801 struct snd_soc_dpcm *dpcm; 1802 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1803 struct snd_soc_dai *fe_cpu_dai; 1804 int err = 0; 1805 int i; 1806 1807 /* apply symmetry for FE */ 1808 soc_pcm_update_symmetry(fe_substream); 1809 1810 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1811 /* Symmetry only applies if we've got an active stream. */ 1812 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1813 if (err < 0) 1814 goto error; 1815 } 1816 1817 /* apply symmetry for BE */ 1818 for_each_dpcm_be(fe, stream, dpcm) { 1819 struct snd_soc_pcm_runtime *be = dpcm->be; 1820 struct snd_pcm_substream *be_substream = 1821 snd_soc_dpcm_get_substream(be, stream); 1822 struct snd_soc_pcm_runtime *rtd; 1823 struct snd_soc_dai *dai; 1824 1825 /* A backend may not have the requested substream */ 1826 if (!be_substream) 1827 continue; 1828 1829 rtd = asoc_substream_to_rtd(be_substream); 1830 if (rtd->dai_link->be_hw_params_fixup) 1831 continue; 1832 1833 soc_pcm_update_symmetry(be_substream); 1834 1835 /* Symmetry only applies if we've got an active stream. */ 1836 for_each_rtd_dais(rtd, i, dai) { 1837 err = soc_pcm_apply_symmetry(fe_substream, dai); 1838 if (err < 0) 1839 goto error; 1840 } 1841 } 1842 error: 1843 return soc_pcm_ret(fe, err); 1844 } 1845 1846 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1847 { 1848 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1849 int stream = fe_substream->stream, ret = 0; 1850 1851 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1852 1853 ret = dpcm_be_dai_startup(fe, stream); 1854 if (ret < 0) 1855 goto be_err; 1856 1857 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1858 1859 /* start the DAI frontend */ 1860 ret = __soc_pcm_open(fe, fe_substream); 1861 if (ret < 0) 1862 goto unwind; 1863 1864 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1865 1866 dpcm_runtime_setup_fe(fe_substream); 1867 1868 dpcm_runtime_setup_be_format(fe_substream); 1869 dpcm_runtime_setup_be_chan(fe_substream); 1870 dpcm_runtime_setup_be_rate(fe_substream); 1871 1872 ret = dpcm_apply_symmetry(fe_substream, stream); 1873 1874 unwind: 1875 if (ret < 0) 1876 dpcm_be_dai_startup_unwind(fe, stream); 1877 be_err: 1878 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1879 1880 return soc_pcm_ret(fe, ret); 1881 } 1882 1883 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1884 { 1885 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1886 int stream = substream->stream; 1887 1888 snd_soc_dpcm_mutex_assert_held(fe); 1889 1890 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1891 1892 /* shutdown the BEs */ 1893 dpcm_be_dai_shutdown(fe, stream); 1894 1895 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1896 1897 /* now shutdown the frontend */ 1898 __soc_pcm_close(fe, substream); 1899 1900 /* run the stream stop event */ 1901 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1902 1903 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1904 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1905 return 0; 1906 } 1907 1908 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1909 { 1910 struct snd_soc_dpcm *dpcm; 1911 1912 /* only hw_params backends that are either sinks or sources 1913 * to this frontend DAI */ 1914 for_each_dpcm_be(fe, stream, dpcm) { 1915 1916 struct snd_soc_pcm_runtime *be = dpcm->be; 1917 struct snd_pcm_substream *be_substream = 1918 snd_soc_dpcm_get_substream(be, stream); 1919 1920 /* is this op for this BE ? */ 1921 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1922 continue; 1923 1924 /* only free hw when no longer used - check all FEs */ 1925 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1926 continue; 1927 1928 /* do not free hw if this BE is used by other FE */ 1929 if (be->dpcm[stream].users > 1) 1930 continue; 1931 1932 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1933 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1934 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1935 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1936 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1937 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1938 continue; 1939 1940 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1941 be->dai_link->name); 1942 1943 __soc_pcm_hw_free(be, be_substream); 1944 1945 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1946 } 1947 } 1948 1949 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1950 { 1951 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1952 int stream = substream->stream; 1953 1954 snd_soc_dpcm_mutex_lock(fe); 1955 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1956 1957 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1958 1959 /* call hw_free on the frontend */ 1960 soc_pcm_hw_clean(fe, substream, 0); 1961 1962 /* only hw_params backends that are either sinks or sources 1963 * to this frontend DAI */ 1964 dpcm_be_dai_hw_free(fe, stream); 1965 1966 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1967 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1968 1969 snd_soc_dpcm_mutex_unlock(fe); 1970 return 0; 1971 } 1972 1973 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1974 { 1975 struct snd_soc_pcm_runtime *be; 1976 struct snd_pcm_substream *be_substream; 1977 struct snd_soc_dpcm *dpcm; 1978 int ret; 1979 1980 for_each_dpcm_be(fe, stream, dpcm) { 1981 struct snd_pcm_hw_params hw_params; 1982 1983 be = dpcm->be; 1984 be_substream = snd_soc_dpcm_get_substream(be, stream); 1985 1986 /* is this op for this BE ? */ 1987 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1988 continue; 1989 1990 /* copy params for each dpcm */ 1991 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 1992 sizeof(struct snd_pcm_hw_params)); 1993 1994 /* perform any hw_params fixups */ 1995 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 1996 if (ret < 0) 1997 goto unwind; 1998 1999 /* copy the fixed-up hw params for BE dai */ 2000 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2001 sizeof(struct snd_pcm_hw_params)); 2002 2003 /* only allow hw_params() if no connected FEs are running */ 2004 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2005 continue; 2006 2007 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2008 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2009 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2010 continue; 2011 2012 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2013 be->dai_link->name); 2014 2015 ret = __soc_pcm_hw_params(be, be_substream, &hw_params); 2016 if (ret < 0) 2017 goto unwind; 2018 2019 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2020 } 2021 return 0; 2022 2023 unwind: 2024 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2025 __func__, be->dai_link->name, ret); 2026 2027 /* disable any enabled and non active backends */ 2028 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2029 be = dpcm->be; 2030 be_substream = snd_soc_dpcm_get_substream(be, stream); 2031 2032 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2033 continue; 2034 2035 /* only allow hw_free() if no connected FEs are running */ 2036 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2037 continue; 2038 2039 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2040 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2041 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2042 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2043 continue; 2044 2045 __soc_pcm_hw_free(be, be_substream); 2046 } 2047 2048 return ret; 2049 } 2050 2051 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2052 struct snd_pcm_hw_params *params) 2053 { 2054 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2055 int ret, stream = substream->stream; 2056 2057 snd_soc_dpcm_mutex_lock(fe); 2058 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2059 2060 memcpy(&fe->dpcm[stream].hw_params, params, 2061 sizeof(struct snd_pcm_hw_params)); 2062 ret = dpcm_be_dai_hw_params(fe, stream); 2063 if (ret < 0) 2064 goto out; 2065 2066 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2067 fe->dai_link->name, params_rate(params), 2068 params_channels(params), params_format(params)); 2069 2070 /* call hw_params on the frontend */ 2071 ret = __soc_pcm_hw_params(fe, substream, params); 2072 if (ret < 0) 2073 dpcm_be_dai_hw_free(fe, stream); 2074 else 2075 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2076 2077 out: 2078 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2079 snd_soc_dpcm_mutex_unlock(fe); 2080 2081 return soc_pcm_ret(fe, ret); 2082 } 2083 2084 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2085 int cmd) 2086 { 2087 struct snd_soc_pcm_runtime *be; 2088 bool pause_stop_transition; 2089 struct snd_soc_dpcm *dpcm; 2090 unsigned long flags; 2091 int ret = 0; 2092 2093 for_each_dpcm_be(fe, stream, dpcm) { 2094 struct snd_pcm_substream *be_substream; 2095 2096 be = dpcm->be; 2097 be_substream = snd_soc_dpcm_get_substream(be, stream); 2098 2099 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); 2100 2101 /* is this op for this BE ? */ 2102 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2103 goto next; 2104 2105 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2106 be->dai_link->name, cmd); 2107 2108 switch (cmd) { 2109 case SNDRV_PCM_TRIGGER_START: 2110 if (!be->dpcm[stream].be_start && 2111 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2112 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2113 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2114 goto next; 2115 2116 be->dpcm[stream].be_start++; 2117 if (be->dpcm[stream].be_start != 1) 2118 goto next; 2119 2120 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2121 ret = soc_pcm_trigger(be_substream, 2122 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2123 else 2124 ret = soc_pcm_trigger(be_substream, 2125 SNDRV_PCM_TRIGGER_START); 2126 if (ret) { 2127 be->dpcm[stream].be_start--; 2128 goto next; 2129 } 2130 2131 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2132 break; 2133 case SNDRV_PCM_TRIGGER_RESUME: 2134 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2135 goto next; 2136 2137 be->dpcm[stream].be_start++; 2138 if (be->dpcm[stream].be_start != 1) 2139 goto next; 2140 2141 ret = soc_pcm_trigger(be_substream, cmd); 2142 if (ret) { 2143 be->dpcm[stream].be_start--; 2144 goto next; 2145 } 2146 2147 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2148 break; 2149 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2150 if (!be->dpcm[stream].be_start && 2151 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2152 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2153 goto next; 2154 2155 fe->dpcm[stream].fe_pause = false; 2156 be->dpcm[stream].be_pause--; 2157 2158 be->dpcm[stream].be_start++; 2159 if (be->dpcm[stream].be_start != 1) 2160 goto next; 2161 2162 ret = soc_pcm_trigger(be_substream, cmd); 2163 if (ret) { 2164 be->dpcm[stream].be_start--; 2165 goto next; 2166 } 2167 2168 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2169 break; 2170 case SNDRV_PCM_TRIGGER_STOP: 2171 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2172 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2173 goto next; 2174 2175 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2176 be->dpcm[stream].be_start--; 2177 2178 if (be->dpcm[stream].be_start != 0) 2179 goto next; 2180 2181 pause_stop_transition = false; 2182 if (fe->dpcm[stream].fe_pause) { 2183 pause_stop_transition = true; 2184 fe->dpcm[stream].fe_pause = false; 2185 be->dpcm[stream].be_pause--; 2186 } 2187 2188 if (be->dpcm[stream].be_pause != 0) 2189 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2190 else 2191 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2192 2193 if (ret) { 2194 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2195 be->dpcm[stream].be_start++; 2196 if (pause_stop_transition) { 2197 fe->dpcm[stream].fe_pause = true; 2198 be->dpcm[stream].be_pause++; 2199 } 2200 goto next; 2201 } 2202 2203 if (be->dpcm[stream].be_pause != 0) 2204 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2205 else 2206 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2207 2208 break; 2209 case SNDRV_PCM_TRIGGER_SUSPEND: 2210 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2211 goto next; 2212 2213 be->dpcm[stream].be_start--; 2214 if (be->dpcm[stream].be_start != 0) 2215 goto next; 2216 2217 ret = soc_pcm_trigger(be_substream, cmd); 2218 if (ret) { 2219 be->dpcm[stream].be_start++; 2220 goto next; 2221 } 2222 2223 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2224 break; 2225 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2226 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2227 goto next; 2228 2229 fe->dpcm[stream].fe_pause = true; 2230 be->dpcm[stream].be_pause++; 2231 2232 be->dpcm[stream].be_start--; 2233 if (be->dpcm[stream].be_start != 0) 2234 goto next; 2235 2236 ret = soc_pcm_trigger(be_substream, cmd); 2237 if (ret) { 2238 be->dpcm[stream].be_start++; 2239 goto next; 2240 } 2241 2242 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2243 break; 2244 } 2245 next: 2246 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2247 if (ret) 2248 break; 2249 } 2250 return soc_pcm_ret(fe, ret); 2251 } 2252 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2253 2254 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2255 int cmd, bool fe_first) 2256 { 2257 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2258 int ret; 2259 2260 /* call trigger on the frontend before the backend. */ 2261 if (fe_first) { 2262 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2263 fe->dai_link->name, cmd); 2264 2265 ret = soc_pcm_trigger(substream, cmd); 2266 if (ret < 0) 2267 return ret; 2268 2269 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2270 return ret; 2271 } 2272 2273 /* call trigger on the frontend after the backend. */ 2274 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2275 if (ret < 0) 2276 return ret; 2277 2278 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2279 fe->dai_link->name, cmd); 2280 2281 ret = soc_pcm_trigger(substream, cmd); 2282 2283 return ret; 2284 } 2285 2286 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2287 { 2288 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2289 int stream = substream->stream; 2290 int ret = 0; 2291 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2292 2293 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2294 2295 switch (trigger) { 2296 case SND_SOC_DPCM_TRIGGER_PRE: 2297 switch (cmd) { 2298 case SNDRV_PCM_TRIGGER_START: 2299 case SNDRV_PCM_TRIGGER_RESUME: 2300 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2301 case SNDRV_PCM_TRIGGER_DRAIN: 2302 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2303 break; 2304 case SNDRV_PCM_TRIGGER_STOP: 2305 case SNDRV_PCM_TRIGGER_SUSPEND: 2306 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2307 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2308 break; 2309 default: 2310 ret = -EINVAL; 2311 break; 2312 } 2313 break; 2314 case SND_SOC_DPCM_TRIGGER_POST: 2315 switch (cmd) { 2316 case SNDRV_PCM_TRIGGER_START: 2317 case SNDRV_PCM_TRIGGER_RESUME: 2318 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2319 case SNDRV_PCM_TRIGGER_DRAIN: 2320 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2321 break; 2322 case SNDRV_PCM_TRIGGER_STOP: 2323 case SNDRV_PCM_TRIGGER_SUSPEND: 2324 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2325 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2326 break; 2327 default: 2328 ret = -EINVAL; 2329 break; 2330 } 2331 break; 2332 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2333 /* bespoke trigger() - handles both FE and BEs */ 2334 2335 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2336 fe->dai_link->name, cmd); 2337 2338 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2339 break; 2340 default: 2341 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2342 fe->dai_link->name); 2343 ret = -EINVAL; 2344 goto out; 2345 } 2346 2347 if (ret < 0) { 2348 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2349 cmd, ret); 2350 goto out; 2351 } 2352 2353 switch (cmd) { 2354 case SNDRV_PCM_TRIGGER_START: 2355 case SNDRV_PCM_TRIGGER_RESUME: 2356 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2357 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2358 break; 2359 case SNDRV_PCM_TRIGGER_STOP: 2360 case SNDRV_PCM_TRIGGER_SUSPEND: 2361 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2362 break; 2363 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2364 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2365 break; 2366 } 2367 2368 out: 2369 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2370 return ret; 2371 } 2372 2373 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2374 { 2375 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2376 int stream = substream->stream; 2377 2378 /* if FE's runtime_update is already set, we're in race; 2379 * process this trigger later at exit 2380 */ 2381 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2382 fe->dpcm[stream].trigger_pending = cmd + 1; 2383 return 0; /* delayed, assuming it's successful */ 2384 } 2385 2386 /* we're alone, let's trigger */ 2387 return dpcm_fe_dai_do_trigger(substream, cmd); 2388 } 2389 2390 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2391 { 2392 struct snd_soc_dpcm *dpcm; 2393 int ret = 0; 2394 2395 for_each_dpcm_be(fe, stream, dpcm) { 2396 2397 struct snd_soc_pcm_runtime *be = dpcm->be; 2398 struct snd_pcm_substream *be_substream = 2399 snd_soc_dpcm_get_substream(be, stream); 2400 2401 /* is this op for this BE ? */ 2402 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2403 continue; 2404 2405 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2406 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2407 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2408 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2409 continue; 2410 2411 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2412 be->dai_link->name); 2413 2414 ret = __soc_pcm_prepare(be, be_substream); 2415 if (ret < 0) 2416 break; 2417 2418 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2419 } 2420 2421 return soc_pcm_ret(fe, ret); 2422 } 2423 2424 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2425 { 2426 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2427 int stream = substream->stream, ret = 0; 2428 2429 snd_soc_dpcm_mutex_lock(fe); 2430 2431 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2432 2433 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2434 2435 /* there is no point preparing this FE if there are no BEs */ 2436 if (list_empty(&fe->dpcm[stream].be_clients)) { 2437 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2438 fe->dai_link->name); 2439 ret = -EINVAL; 2440 goto out; 2441 } 2442 2443 ret = dpcm_be_dai_prepare(fe, stream); 2444 if (ret < 0) 2445 goto out; 2446 2447 /* call prepare on the frontend */ 2448 ret = __soc_pcm_prepare(fe, substream); 2449 if (ret < 0) 2450 goto out; 2451 2452 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2453 2454 out: 2455 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2456 snd_soc_dpcm_mutex_unlock(fe); 2457 2458 return soc_pcm_ret(fe, ret); 2459 } 2460 2461 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2462 { 2463 struct snd_pcm_substream *substream = 2464 snd_soc_dpcm_get_substream(fe, stream); 2465 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2466 int err; 2467 2468 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2469 stream ? "capture" : "playback", fe->dai_link->name); 2470 2471 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2472 /* call bespoke trigger - FE takes care of all BE triggers */ 2473 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2474 fe->dai_link->name); 2475 2476 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2477 } else { 2478 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2479 fe->dai_link->name); 2480 2481 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2482 } 2483 2484 dpcm_be_dai_hw_free(fe, stream); 2485 2486 dpcm_be_dai_shutdown(fe, stream); 2487 2488 /* run the stream event for each BE */ 2489 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2490 2491 return soc_pcm_ret(fe, err); 2492 } 2493 2494 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2495 { 2496 struct snd_pcm_substream *substream = 2497 snd_soc_dpcm_get_substream(fe, stream); 2498 struct snd_soc_dpcm *dpcm; 2499 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2500 int ret = 0; 2501 2502 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2503 stream ? "capture" : "playback", fe->dai_link->name); 2504 2505 /* Only start the BE if the FE is ready */ 2506 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2507 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2508 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2509 fe->dai_link->name, fe->dpcm[stream].state); 2510 ret = -EINVAL; 2511 goto disconnect; 2512 } 2513 2514 /* startup must always be called for new BEs */ 2515 ret = dpcm_be_dai_startup(fe, stream); 2516 if (ret < 0) 2517 goto disconnect; 2518 2519 /* keep going if FE state is > open */ 2520 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2521 return 0; 2522 2523 ret = dpcm_be_dai_hw_params(fe, stream); 2524 if (ret < 0) 2525 goto close; 2526 2527 /* keep going if FE state is > hw_params */ 2528 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2529 return 0; 2530 2531 ret = dpcm_be_dai_prepare(fe, stream); 2532 if (ret < 0) 2533 goto hw_free; 2534 2535 /* run the stream event for each BE */ 2536 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2537 2538 /* keep going if FE state is > prepare */ 2539 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2540 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2541 return 0; 2542 2543 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2544 /* call trigger on the frontend - FE takes care of all BE triggers */ 2545 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2546 fe->dai_link->name); 2547 2548 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2549 if (ret < 0) 2550 goto hw_free; 2551 } else { 2552 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2553 fe->dai_link->name); 2554 2555 ret = dpcm_be_dai_trigger(fe, stream, 2556 SNDRV_PCM_TRIGGER_START); 2557 if (ret < 0) 2558 goto hw_free; 2559 } 2560 2561 return 0; 2562 2563 hw_free: 2564 dpcm_be_dai_hw_free(fe, stream); 2565 close: 2566 dpcm_be_dai_shutdown(fe, stream); 2567 disconnect: 2568 /* disconnect any pending BEs */ 2569 for_each_dpcm_be(fe, stream, dpcm) { 2570 struct snd_soc_pcm_runtime *be = dpcm->be; 2571 2572 /* is this op for this BE ? */ 2573 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2574 continue; 2575 2576 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2577 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2578 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2579 } 2580 2581 return soc_pcm_ret(fe, ret); 2582 } 2583 2584 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2585 { 2586 struct snd_soc_dapm_widget_list *list; 2587 int stream; 2588 int count, paths; 2589 2590 if (!fe->dai_link->dynamic) 2591 return 0; 2592 2593 if (fe->dai_link->num_cpus > 1) { 2594 dev_err(fe->dev, 2595 "%s doesn't support Multi CPU yet\n", __func__); 2596 return -EINVAL; 2597 } 2598 2599 /* only check active links */ 2600 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2601 return 0; 2602 2603 /* DAPM sync will call this to update DSP paths */ 2604 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2605 new ? "new" : "old", fe->dai_link->name); 2606 2607 for_each_pcm_streams(stream) { 2608 2609 /* skip if FE doesn't have playback/capture capability */ 2610 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2611 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2612 continue; 2613 2614 /* skip if FE isn't currently playing/capturing */ 2615 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2616 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2617 continue; 2618 2619 paths = dpcm_path_get(fe, stream, &list); 2620 if (paths < 0) 2621 return paths; 2622 2623 /* update any playback/capture paths */ 2624 count = dpcm_process_paths(fe, stream, &list, new); 2625 if (count) { 2626 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2627 if (new) 2628 dpcm_run_update_startup(fe, stream); 2629 else 2630 dpcm_run_update_shutdown(fe, stream); 2631 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2632 2633 dpcm_clear_pending_state(fe, stream); 2634 dpcm_be_disconnect(fe, stream); 2635 } 2636 2637 dpcm_path_put(&list); 2638 } 2639 2640 return 0; 2641 } 2642 2643 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2644 * any DAI links. 2645 */ 2646 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2647 { 2648 struct snd_soc_pcm_runtime *fe; 2649 int ret = 0; 2650 2651 mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass); 2652 /* shutdown all old paths first */ 2653 for_each_card_rtds(card, fe) { 2654 ret = soc_dpcm_fe_runtime_update(fe, 0); 2655 if (ret) 2656 goto out; 2657 } 2658 2659 /* bring new paths up */ 2660 for_each_card_rtds(card, fe) { 2661 ret = soc_dpcm_fe_runtime_update(fe, 1); 2662 if (ret) 2663 goto out; 2664 } 2665 2666 out: 2667 mutex_unlock(&card->pcm_mutex); 2668 return ret; 2669 } 2670 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2671 2672 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2673 { 2674 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2675 struct snd_soc_dpcm *dpcm; 2676 int stream = fe_substream->stream; 2677 2678 snd_soc_dpcm_mutex_assert_held(fe); 2679 2680 /* mark FE's links ready to prune */ 2681 for_each_dpcm_be(fe, stream, dpcm) 2682 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2683 2684 dpcm_be_disconnect(fe, stream); 2685 2686 fe->dpcm[stream].runtime = NULL; 2687 } 2688 2689 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2690 { 2691 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2692 int ret; 2693 2694 snd_soc_dpcm_mutex_lock(fe); 2695 ret = dpcm_fe_dai_shutdown(fe_substream); 2696 2697 dpcm_fe_dai_cleanup(fe_substream); 2698 2699 snd_soc_dpcm_mutex_unlock(fe); 2700 return ret; 2701 } 2702 2703 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2704 { 2705 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2706 struct snd_soc_dapm_widget_list *list; 2707 int ret; 2708 int stream = fe_substream->stream; 2709 2710 snd_soc_dpcm_mutex_lock(fe); 2711 fe->dpcm[stream].runtime = fe_substream->runtime; 2712 2713 ret = dpcm_path_get(fe, stream, &list); 2714 if (ret < 0) 2715 goto open_end; 2716 2717 /* calculate valid and active FE <-> BE dpcms */ 2718 dpcm_process_paths(fe, stream, &list, 1); 2719 2720 ret = dpcm_fe_dai_startup(fe_substream); 2721 if (ret < 0) 2722 dpcm_fe_dai_cleanup(fe_substream); 2723 2724 dpcm_clear_pending_state(fe, stream); 2725 dpcm_path_put(&list); 2726 open_end: 2727 snd_soc_dpcm_mutex_unlock(fe); 2728 return ret; 2729 } 2730 2731 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2732 int *playback, int *capture) 2733 { 2734 struct snd_soc_dai *cpu_dai; 2735 int i; 2736 2737 if (rtd->dai_link->dynamic && rtd->dai_link->num_cpus > 1) { 2738 dev_err(rtd->dev, 2739 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2740 return -EINVAL; 2741 } 2742 2743 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2744 int stream; 2745 2746 if (rtd->dai_link->dpcm_playback) { 2747 stream = SNDRV_PCM_STREAM_PLAYBACK; 2748 2749 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2750 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2751 *playback = 1; 2752 break; 2753 } 2754 } 2755 if (!*playback) { 2756 dev_err(rtd->card->dev, 2757 "No CPU DAIs support playback for stream %s\n", 2758 rtd->dai_link->stream_name); 2759 return -EINVAL; 2760 } 2761 } 2762 if (rtd->dai_link->dpcm_capture) { 2763 stream = SNDRV_PCM_STREAM_CAPTURE; 2764 2765 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2766 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2767 *capture = 1; 2768 break; 2769 } 2770 } 2771 2772 if (!*capture) { 2773 dev_err(rtd->card->dev, 2774 "No CPU DAIs support capture for stream %s\n", 2775 rtd->dai_link->stream_name); 2776 return -EINVAL; 2777 } 2778 } 2779 } else { 2780 struct snd_soc_dai *codec_dai; 2781 2782 /* Adapt stream for codec2codec links */ 2783 int cpu_capture = rtd->dai_link->params ? 2784 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2785 int cpu_playback = rtd->dai_link->params ? 2786 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2787 2788 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2789 if (rtd->dai_link->num_cpus == 1) { 2790 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2791 } else if (rtd->dai_link->num_cpus == rtd->dai_link->num_codecs) { 2792 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2793 } else { 2794 dev_err(rtd->card->dev, 2795 "N cpus to M codecs link is not supported yet\n"); 2796 return -EINVAL; 2797 } 2798 2799 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2800 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2801 *playback = 1; 2802 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2803 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2804 *capture = 1; 2805 } 2806 } 2807 2808 if (rtd->dai_link->playback_only) { 2809 *playback = 1; 2810 *capture = 0; 2811 } 2812 2813 if (rtd->dai_link->capture_only) { 2814 *playback = 0; 2815 *capture = 1; 2816 } 2817 2818 return 0; 2819 } 2820 2821 static int soc_create_pcm(struct snd_pcm **pcm, 2822 struct snd_soc_pcm_runtime *rtd, 2823 int playback, int capture, int num) 2824 { 2825 char new_name[64]; 2826 int ret; 2827 2828 /* create the PCM */ 2829 if (rtd->dai_link->params) { 2830 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2831 rtd->dai_link->stream_name); 2832 2833 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2834 playback, capture, pcm); 2835 } else if (rtd->dai_link->no_pcm) { 2836 snprintf(new_name, sizeof(new_name), "(%s)", 2837 rtd->dai_link->stream_name); 2838 2839 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2840 playback, capture, pcm); 2841 } else { 2842 if (rtd->dai_link->dynamic) 2843 snprintf(new_name, sizeof(new_name), "%s (*)", 2844 rtd->dai_link->stream_name); 2845 else 2846 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2847 rtd->dai_link->stream_name, 2848 soc_codec_dai_name(rtd), num); 2849 2850 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2851 capture, pcm); 2852 } 2853 if (ret < 0) { 2854 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2855 new_name, rtd->dai_link->name, ret); 2856 return ret; 2857 } 2858 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2859 2860 return 0; 2861 } 2862 2863 /* create a new pcm */ 2864 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2865 { 2866 struct snd_soc_component *component; 2867 struct snd_pcm *pcm; 2868 int ret = 0, playback = 0, capture = 0; 2869 int i; 2870 2871 ret = soc_get_playback_capture(rtd, &playback, &capture); 2872 if (ret < 0) 2873 return ret; 2874 2875 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2876 if (ret < 0) 2877 return ret; 2878 2879 /* DAPM dai link stream work */ 2880 /* 2881 * Currently nothing to do for c2c links 2882 * Since c2c links are internal nodes in the DAPM graph and 2883 * don't interface with the outside world or application layer 2884 * we don't have to do any special handling on close. 2885 */ 2886 if (!rtd->dai_link->params) 2887 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2888 2889 rtd->pcm = pcm; 2890 pcm->nonatomic = rtd->dai_link->nonatomic; 2891 pcm->private_data = rtd; 2892 pcm->no_device_suspend = true; 2893 2894 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2895 if (playback) 2896 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2897 if (capture) 2898 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2899 goto out; 2900 } 2901 2902 /* ASoC PCM operations */ 2903 if (rtd->dai_link->dynamic) { 2904 rtd->ops.open = dpcm_fe_dai_open; 2905 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2906 rtd->ops.prepare = dpcm_fe_dai_prepare; 2907 rtd->ops.trigger = dpcm_fe_dai_trigger; 2908 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2909 rtd->ops.close = dpcm_fe_dai_close; 2910 rtd->ops.pointer = soc_pcm_pointer; 2911 } else { 2912 rtd->ops.open = soc_pcm_open; 2913 rtd->ops.hw_params = soc_pcm_hw_params; 2914 rtd->ops.prepare = soc_pcm_prepare; 2915 rtd->ops.trigger = soc_pcm_trigger; 2916 rtd->ops.hw_free = soc_pcm_hw_free; 2917 rtd->ops.close = soc_pcm_close; 2918 rtd->ops.pointer = soc_pcm_pointer; 2919 } 2920 2921 for_each_rtd_components(rtd, i, component) { 2922 const struct snd_soc_component_driver *drv = component->driver; 2923 2924 if (drv->ioctl) 2925 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2926 if (drv->sync_stop) 2927 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2928 if (drv->copy_user) 2929 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2930 if (drv->page) 2931 rtd->ops.page = snd_soc_pcm_component_page; 2932 if (drv->mmap) 2933 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2934 if (drv->ack) 2935 rtd->ops.ack = snd_soc_pcm_component_ack; 2936 } 2937 2938 if (playback) 2939 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2940 2941 if (capture) 2942 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2943 2944 ret = snd_soc_pcm_component_new(rtd); 2945 if (ret < 0) 2946 return ret; 2947 out: 2948 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2949 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2950 return ret; 2951 } 2952 2953 /* is the current PCM operation for this FE ? */ 2954 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2955 { 2956 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2957 return 1; 2958 return 0; 2959 } 2960 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2961 2962 /* is the current PCM operation for this BE ? */ 2963 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2964 struct snd_soc_pcm_runtime *be, int stream) 2965 { 2966 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2967 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2968 be->dpcm[stream].runtime_update)) 2969 return 1; 2970 return 0; 2971 } 2972 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2973 2974 /* get the substream for this BE */ 2975 struct snd_pcm_substream * 2976 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2977 { 2978 return be->pcm->streams[stream].substream; 2979 } 2980 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2981 2982 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 2983 struct snd_soc_pcm_runtime *be, 2984 int stream, 2985 const enum snd_soc_dpcm_state *states, 2986 int num_states) 2987 { 2988 struct snd_soc_dpcm *dpcm; 2989 int state; 2990 int ret = 1; 2991 int i; 2992 2993 for_each_dpcm_fe(be, stream, dpcm) { 2994 2995 if (dpcm->fe == fe) 2996 continue; 2997 2998 state = dpcm->fe->dpcm[stream].state; 2999 for (i = 0; i < num_states; i++) { 3000 if (state == states[i]) { 3001 ret = 0; 3002 break; 3003 } 3004 } 3005 } 3006 3007 /* it's safe to do this BE DAI */ 3008 return ret; 3009 } 3010 3011 /* 3012 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3013 * are not running, paused or suspended for the specified stream direction. 3014 */ 3015 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3016 struct snd_soc_pcm_runtime *be, int stream) 3017 { 3018 const enum snd_soc_dpcm_state state[] = { 3019 SND_SOC_DPCM_STATE_START, 3020 SND_SOC_DPCM_STATE_PAUSED, 3021 SND_SOC_DPCM_STATE_SUSPEND, 3022 }; 3023 3024 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3025 } 3026 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3027 3028 /* 3029 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3030 * running, paused or suspended for the specified stream direction. 3031 */ 3032 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3033 struct snd_soc_pcm_runtime *be, int stream) 3034 { 3035 const enum snd_soc_dpcm_state state[] = { 3036 SND_SOC_DPCM_STATE_START, 3037 SND_SOC_DPCM_STATE_PAUSED, 3038 SND_SOC_DPCM_STATE_SUSPEND, 3039 SND_SOC_DPCM_STATE_PREPARE, 3040 }; 3041 3042 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3043 } 3044 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3045