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