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 u64 formats = hw->formats; 1665 int i; 1666 1667 soc_pcm_hw_init(hw); 1668 1669 if (formats) 1670 hw->formats &= formats; 1671 1672 for_each_rtd_cpu_dais(fe, i, dai) { 1673 struct snd_soc_pcm_stream *cpu_stream; 1674 1675 /* 1676 * Skip CPUs which don't support the current stream 1677 * type. See soc_pcm_init_runtime_hw() for more details 1678 */ 1679 if (!snd_soc_dai_stream_valid(dai, stream)) 1680 continue; 1681 1682 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1683 1684 soc_pcm_hw_update_rate(hw, cpu_stream); 1685 soc_pcm_hw_update_chan(hw, cpu_stream); 1686 soc_pcm_hw_update_format(hw, cpu_stream); 1687 } 1688 1689 } 1690 1691 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1692 { 1693 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1694 struct snd_pcm_runtime *runtime = substream->runtime; 1695 struct snd_pcm_hardware *hw = &runtime->hw; 1696 struct snd_soc_dpcm *dpcm; 1697 struct snd_soc_dai *dai; 1698 int stream = substream->stream; 1699 1700 if (!fe->dai_link->dpcm_merged_format) 1701 return; 1702 1703 /* 1704 * It returns merged BE codec format 1705 * if FE want to use it (= dpcm_merged_format) 1706 */ 1707 1708 for_each_dpcm_be(fe, stream, dpcm) { 1709 struct snd_soc_pcm_runtime *be = dpcm->be; 1710 struct snd_soc_pcm_stream *codec_stream; 1711 int i; 1712 1713 for_each_rtd_codec_dais(be, i, dai) { 1714 /* 1715 * Skip CODECs which don't support the current stream 1716 * type. See soc_pcm_init_runtime_hw() for more details 1717 */ 1718 if (!snd_soc_dai_stream_valid(dai, stream)) 1719 continue; 1720 1721 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1722 1723 soc_pcm_hw_update_format(hw, codec_stream); 1724 } 1725 } 1726 } 1727 1728 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1729 { 1730 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1731 struct snd_pcm_runtime *runtime = substream->runtime; 1732 struct snd_pcm_hardware *hw = &runtime->hw; 1733 struct snd_soc_dpcm *dpcm; 1734 int stream = substream->stream; 1735 1736 if (!fe->dai_link->dpcm_merged_chan) 1737 return; 1738 1739 /* 1740 * It returns merged BE codec channel; 1741 * if FE want to use it (= dpcm_merged_chan) 1742 */ 1743 1744 for_each_dpcm_be(fe, stream, dpcm) { 1745 struct snd_soc_pcm_runtime *be = dpcm->be; 1746 struct snd_soc_pcm_stream *cpu_stream; 1747 struct snd_soc_dai *dai; 1748 int i; 1749 1750 for_each_rtd_cpu_dais(be, i, dai) { 1751 /* 1752 * Skip CPUs which don't support the current stream 1753 * type. See soc_pcm_init_runtime_hw() for more details 1754 */ 1755 if (!snd_soc_dai_stream_valid(dai, stream)) 1756 continue; 1757 1758 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1759 1760 soc_pcm_hw_update_chan(hw, cpu_stream); 1761 } 1762 1763 /* 1764 * chan min/max cannot be enforced if there are multiple CODEC 1765 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1766 */ 1767 if (be->dai_link->num_codecs == 1) { 1768 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1769 asoc_rtd_to_codec(be, 0), stream); 1770 1771 soc_pcm_hw_update_chan(hw, codec_stream); 1772 } 1773 } 1774 } 1775 1776 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1777 { 1778 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1779 struct snd_pcm_runtime *runtime = substream->runtime; 1780 struct snd_pcm_hardware *hw = &runtime->hw; 1781 struct snd_soc_dpcm *dpcm; 1782 int stream = substream->stream; 1783 1784 if (!fe->dai_link->dpcm_merged_rate) 1785 return; 1786 1787 /* 1788 * It returns merged BE codec channel; 1789 * if FE want to use it (= dpcm_merged_chan) 1790 */ 1791 1792 for_each_dpcm_be(fe, stream, dpcm) { 1793 struct snd_soc_pcm_runtime *be = dpcm->be; 1794 struct snd_soc_pcm_stream *pcm; 1795 struct snd_soc_dai *dai; 1796 int i; 1797 1798 for_each_rtd_dais(be, i, dai) { 1799 /* 1800 * Skip DAIs which don't support the current stream 1801 * type. See soc_pcm_init_runtime_hw() for more details 1802 */ 1803 if (!snd_soc_dai_stream_valid(dai, stream)) 1804 continue; 1805 1806 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1807 1808 soc_pcm_hw_update_rate(hw, pcm); 1809 } 1810 } 1811 } 1812 1813 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1814 int stream) 1815 { 1816 struct snd_soc_dpcm *dpcm; 1817 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1818 struct snd_soc_dai *fe_cpu_dai; 1819 int err = 0; 1820 int i; 1821 1822 /* apply symmetry for FE */ 1823 soc_pcm_update_symmetry(fe_substream); 1824 1825 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1826 /* Symmetry only applies if we've got an active stream. */ 1827 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1828 if (err < 0) 1829 goto error; 1830 } 1831 1832 /* apply symmetry for BE */ 1833 for_each_dpcm_be(fe, stream, dpcm) { 1834 struct snd_soc_pcm_runtime *be = dpcm->be; 1835 struct snd_pcm_substream *be_substream = 1836 snd_soc_dpcm_get_substream(be, stream); 1837 struct snd_soc_pcm_runtime *rtd; 1838 struct snd_soc_dai *dai; 1839 1840 /* A backend may not have the requested substream */ 1841 if (!be_substream) 1842 continue; 1843 1844 rtd = asoc_substream_to_rtd(be_substream); 1845 if (rtd->dai_link->be_hw_params_fixup) 1846 continue; 1847 1848 soc_pcm_update_symmetry(be_substream); 1849 1850 /* Symmetry only applies if we've got an active stream. */ 1851 for_each_rtd_dais(rtd, i, dai) { 1852 err = soc_pcm_apply_symmetry(fe_substream, dai); 1853 if (err < 0) 1854 goto error; 1855 } 1856 } 1857 error: 1858 return soc_pcm_ret(fe, err); 1859 } 1860 1861 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1862 { 1863 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1864 int stream = fe_substream->stream, ret = 0; 1865 1866 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1867 1868 ret = dpcm_be_dai_startup(fe, stream); 1869 if (ret < 0) 1870 goto be_err; 1871 1872 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1873 1874 /* start the DAI frontend */ 1875 ret = __soc_pcm_open(fe, fe_substream); 1876 if (ret < 0) 1877 goto unwind; 1878 1879 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1880 1881 dpcm_runtime_setup_fe(fe_substream); 1882 1883 dpcm_runtime_setup_be_format(fe_substream); 1884 dpcm_runtime_setup_be_chan(fe_substream); 1885 dpcm_runtime_setup_be_rate(fe_substream); 1886 1887 ret = dpcm_apply_symmetry(fe_substream, stream); 1888 1889 unwind: 1890 if (ret < 0) 1891 dpcm_be_dai_startup_unwind(fe, stream); 1892 be_err: 1893 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1894 1895 return soc_pcm_ret(fe, ret); 1896 } 1897 1898 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1899 { 1900 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1901 int stream = substream->stream; 1902 1903 snd_soc_dpcm_mutex_assert_held(fe); 1904 1905 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1906 1907 /* shutdown the BEs */ 1908 dpcm_be_dai_shutdown(fe, stream); 1909 1910 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1911 1912 /* now shutdown the frontend */ 1913 __soc_pcm_close(fe, substream); 1914 1915 /* run the stream stop event */ 1916 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1917 1918 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1919 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1920 return 0; 1921 } 1922 1923 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1924 { 1925 struct snd_soc_dpcm *dpcm; 1926 1927 /* only hw_params backends that are either sinks or sources 1928 * to this frontend DAI */ 1929 for_each_dpcm_be(fe, stream, dpcm) { 1930 1931 struct snd_soc_pcm_runtime *be = dpcm->be; 1932 struct snd_pcm_substream *be_substream = 1933 snd_soc_dpcm_get_substream(be, stream); 1934 1935 /* is this op for this BE ? */ 1936 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1937 continue; 1938 1939 /* only free hw when no longer used - check all FEs */ 1940 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1941 continue; 1942 1943 /* do not free hw if this BE is used by other FE */ 1944 if (be->dpcm[stream].users > 1) 1945 continue; 1946 1947 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1948 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1949 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1950 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1951 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1952 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1953 continue; 1954 1955 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1956 be->dai_link->name); 1957 1958 __soc_pcm_hw_free(be, be_substream); 1959 1960 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1961 } 1962 } 1963 1964 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1965 { 1966 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1967 int stream = substream->stream; 1968 1969 snd_soc_dpcm_mutex_lock(fe); 1970 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1971 1972 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1973 1974 /* call hw_free on the frontend */ 1975 soc_pcm_hw_clean(fe, substream, 0); 1976 1977 /* only hw_params backends that are either sinks or sources 1978 * to this frontend DAI */ 1979 dpcm_be_dai_hw_free(fe, stream); 1980 1981 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1982 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1983 1984 snd_soc_dpcm_mutex_unlock(fe); 1985 return 0; 1986 } 1987 1988 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1989 { 1990 struct snd_soc_pcm_runtime *be; 1991 struct snd_pcm_substream *be_substream; 1992 struct snd_soc_dpcm *dpcm; 1993 int ret; 1994 1995 for_each_dpcm_be(fe, stream, dpcm) { 1996 struct snd_pcm_hw_params hw_params; 1997 1998 be = dpcm->be; 1999 be_substream = snd_soc_dpcm_get_substream(be, stream); 2000 2001 /* is this op for this BE ? */ 2002 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2003 continue; 2004 2005 /* copy params for each dpcm */ 2006 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 2007 sizeof(struct snd_pcm_hw_params)); 2008 2009 /* perform any hw_params fixups */ 2010 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 2011 if (ret < 0) 2012 goto unwind; 2013 2014 /* copy the fixed-up hw params for BE dai */ 2015 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2016 sizeof(struct snd_pcm_hw_params)); 2017 2018 /* only allow hw_params() if no connected FEs are running */ 2019 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2020 continue; 2021 2022 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2023 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2024 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2025 continue; 2026 2027 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2028 be->dai_link->name); 2029 2030 ret = __soc_pcm_hw_params(be, be_substream, &hw_params); 2031 if (ret < 0) 2032 goto unwind; 2033 2034 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2035 } 2036 return 0; 2037 2038 unwind: 2039 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2040 __func__, be->dai_link->name, ret); 2041 2042 /* disable any enabled and non active backends */ 2043 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2044 be = dpcm->be; 2045 be_substream = snd_soc_dpcm_get_substream(be, stream); 2046 2047 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2048 continue; 2049 2050 /* only allow hw_free() if no connected FEs are running */ 2051 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2052 continue; 2053 2054 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2055 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2056 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2057 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2058 continue; 2059 2060 __soc_pcm_hw_free(be, be_substream); 2061 } 2062 2063 return ret; 2064 } 2065 2066 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2067 struct snd_pcm_hw_params *params) 2068 { 2069 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2070 int ret, stream = substream->stream; 2071 2072 snd_soc_dpcm_mutex_lock(fe); 2073 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2074 2075 memcpy(&fe->dpcm[stream].hw_params, params, 2076 sizeof(struct snd_pcm_hw_params)); 2077 ret = dpcm_be_dai_hw_params(fe, stream); 2078 if (ret < 0) 2079 goto out; 2080 2081 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2082 fe->dai_link->name, params_rate(params), 2083 params_channels(params), params_format(params)); 2084 2085 /* call hw_params on the frontend */ 2086 ret = __soc_pcm_hw_params(fe, substream, params); 2087 if (ret < 0) 2088 dpcm_be_dai_hw_free(fe, stream); 2089 else 2090 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2091 2092 out: 2093 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2094 snd_soc_dpcm_mutex_unlock(fe); 2095 2096 return soc_pcm_ret(fe, ret); 2097 } 2098 2099 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2100 int cmd) 2101 { 2102 struct snd_soc_pcm_runtime *be; 2103 bool pause_stop_transition; 2104 struct snd_soc_dpcm *dpcm; 2105 unsigned long flags; 2106 int ret = 0; 2107 2108 for_each_dpcm_be(fe, stream, dpcm) { 2109 struct snd_pcm_substream *be_substream; 2110 2111 be = dpcm->be; 2112 be_substream = snd_soc_dpcm_get_substream(be, stream); 2113 2114 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); 2115 2116 /* is this op for this BE ? */ 2117 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2118 goto next; 2119 2120 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2121 be->dai_link->name, cmd); 2122 2123 switch (cmd) { 2124 case SNDRV_PCM_TRIGGER_START: 2125 if (!be->dpcm[stream].be_start && 2126 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2127 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2128 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2129 goto next; 2130 2131 be->dpcm[stream].be_start++; 2132 if (be->dpcm[stream].be_start != 1) 2133 goto next; 2134 2135 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2136 ret = soc_pcm_trigger(be_substream, 2137 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2138 else 2139 ret = soc_pcm_trigger(be_substream, 2140 SNDRV_PCM_TRIGGER_START); 2141 if (ret) { 2142 be->dpcm[stream].be_start--; 2143 goto next; 2144 } 2145 2146 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2147 break; 2148 case SNDRV_PCM_TRIGGER_RESUME: 2149 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2150 goto next; 2151 2152 be->dpcm[stream].be_start++; 2153 if (be->dpcm[stream].be_start != 1) 2154 goto next; 2155 2156 ret = soc_pcm_trigger(be_substream, cmd); 2157 if (ret) { 2158 be->dpcm[stream].be_start--; 2159 goto next; 2160 } 2161 2162 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2163 break; 2164 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2165 if (!be->dpcm[stream].be_start && 2166 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2167 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2168 goto next; 2169 2170 fe->dpcm[stream].fe_pause = false; 2171 be->dpcm[stream].be_pause--; 2172 2173 be->dpcm[stream].be_start++; 2174 if (be->dpcm[stream].be_start != 1) 2175 goto next; 2176 2177 ret = soc_pcm_trigger(be_substream, cmd); 2178 if (ret) { 2179 be->dpcm[stream].be_start--; 2180 goto next; 2181 } 2182 2183 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2184 break; 2185 case SNDRV_PCM_TRIGGER_STOP: 2186 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2187 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2188 goto next; 2189 2190 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2191 be->dpcm[stream].be_start--; 2192 2193 if (be->dpcm[stream].be_start != 0) 2194 goto next; 2195 2196 pause_stop_transition = false; 2197 if (fe->dpcm[stream].fe_pause) { 2198 pause_stop_transition = true; 2199 fe->dpcm[stream].fe_pause = false; 2200 be->dpcm[stream].be_pause--; 2201 } 2202 2203 if (be->dpcm[stream].be_pause != 0) 2204 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2205 else 2206 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2207 2208 if (ret) { 2209 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2210 be->dpcm[stream].be_start++; 2211 if (pause_stop_transition) { 2212 fe->dpcm[stream].fe_pause = true; 2213 be->dpcm[stream].be_pause++; 2214 } 2215 goto next; 2216 } 2217 2218 if (be->dpcm[stream].be_pause != 0) 2219 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2220 else 2221 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2222 2223 break; 2224 case SNDRV_PCM_TRIGGER_SUSPEND: 2225 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2226 goto next; 2227 2228 be->dpcm[stream].be_start--; 2229 if (be->dpcm[stream].be_start != 0) 2230 goto next; 2231 2232 ret = soc_pcm_trigger(be_substream, cmd); 2233 if (ret) { 2234 be->dpcm[stream].be_start++; 2235 goto next; 2236 } 2237 2238 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2239 break; 2240 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2241 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2242 goto next; 2243 2244 fe->dpcm[stream].fe_pause = true; 2245 be->dpcm[stream].be_pause++; 2246 2247 be->dpcm[stream].be_start--; 2248 if (be->dpcm[stream].be_start != 0) 2249 goto next; 2250 2251 ret = soc_pcm_trigger(be_substream, cmd); 2252 if (ret) { 2253 be->dpcm[stream].be_start++; 2254 goto next; 2255 } 2256 2257 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2258 break; 2259 } 2260 next: 2261 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2262 if (ret) 2263 break; 2264 } 2265 return soc_pcm_ret(fe, ret); 2266 } 2267 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2268 2269 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2270 int cmd, bool fe_first) 2271 { 2272 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2273 int ret; 2274 2275 /* call trigger on the frontend before the backend. */ 2276 if (fe_first) { 2277 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2278 fe->dai_link->name, cmd); 2279 2280 ret = soc_pcm_trigger(substream, cmd); 2281 if (ret < 0) 2282 return ret; 2283 2284 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2285 return ret; 2286 } 2287 2288 /* call trigger on the frontend after the backend. */ 2289 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2290 if (ret < 0) 2291 return ret; 2292 2293 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2294 fe->dai_link->name, cmd); 2295 2296 ret = soc_pcm_trigger(substream, cmd); 2297 2298 return ret; 2299 } 2300 2301 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2302 { 2303 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2304 int stream = substream->stream; 2305 int ret = 0; 2306 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2307 2308 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2309 2310 switch (trigger) { 2311 case SND_SOC_DPCM_TRIGGER_PRE: 2312 switch (cmd) { 2313 case SNDRV_PCM_TRIGGER_START: 2314 case SNDRV_PCM_TRIGGER_RESUME: 2315 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2316 case SNDRV_PCM_TRIGGER_DRAIN: 2317 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2318 break; 2319 case SNDRV_PCM_TRIGGER_STOP: 2320 case SNDRV_PCM_TRIGGER_SUSPEND: 2321 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2322 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2323 break; 2324 default: 2325 ret = -EINVAL; 2326 break; 2327 } 2328 break; 2329 case SND_SOC_DPCM_TRIGGER_POST: 2330 switch (cmd) { 2331 case SNDRV_PCM_TRIGGER_START: 2332 case SNDRV_PCM_TRIGGER_RESUME: 2333 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2334 case SNDRV_PCM_TRIGGER_DRAIN: 2335 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2336 break; 2337 case SNDRV_PCM_TRIGGER_STOP: 2338 case SNDRV_PCM_TRIGGER_SUSPEND: 2339 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2340 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2341 break; 2342 default: 2343 ret = -EINVAL; 2344 break; 2345 } 2346 break; 2347 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2348 /* bespoke trigger() - handles both FE and BEs */ 2349 2350 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2351 fe->dai_link->name, cmd); 2352 2353 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2354 break; 2355 default: 2356 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2357 fe->dai_link->name); 2358 ret = -EINVAL; 2359 goto out; 2360 } 2361 2362 if (ret < 0) { 2363 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2364 cmd, ret); 2365 goto out; 2366 } 2367 2368 switch (cmd) { 2369 case SNDRV_PCM_TRIGGER_START: 2370 case SNDRV_PCM_TRIGGER_RESUME: 2371 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2372 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2373 break; 2374 case SNDRV_PCM_TRIGGER_STOP: 2375 case SNDRV_PCM_TRIGGER_SUSPEND: 2376 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2377 break; 2378 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2379 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2380 break; 2381 } 2382 2383 out: 2384 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2385 return ret; 2386 } 2387 2388 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2389 { 2390 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2391 int stream = substream->stream; 2392 2393 /* if FE's runtime_update is already set, we're in race; 2394 * process this trigger later at exit 2395 */ 2396 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2397 fe->dpcm[stream].trigger_pending = cmd + 1; 2398 return 0; /* delayed, assuming it's successful */ 2399 } 2400 2401 /* we're alone, let's trigger */ 2402 return dpcm_fe_dai_do_trigger(substream, cmd); 2403 } 2404 2405 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2406 { 2407 struct snd_soc_dpcm *dpcm; 2408 int ret = 0; 2409 2410 for_each_dpcm_be(fe, stream, dpcm) { 2411 2412 struct snd_soc_pcm_runtime *be = dpcm->be; 2413 struct snd_pcm_substream *be_substream = 2414 snd_soc_dpcm_get_substream(be, stream); 2415 2416 /* is this op for this BE ? */ 2417 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2418 continue; 2419 2420 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2421 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2422 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2423 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2424 continue; 2425 2426 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2427 be->dai_link->name); 2428 2429 ret = __soc_pcm_prepare(be, be_substream); 2430 if (ret < 0) 2431 break; 2432 2433 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2434 } 2435 2436 return soc_pcm_ret(fe, ret); 2437 } 2438 2439 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2440 { 2441 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2442 int stream = substream->stream, ret = 0; 2443 2444 snd_soc_dpcm_mutex_lock(fe); 2445 2446 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2447 2448 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2449 2450 /* there is no point preparing this FE if there are no BEs */ 2451 if (list_empty(&fe->dpcm[stream].be_clients)) { 2452 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2453 fe->dai_link->name); 2454 ret = -EINVAL; 2455 goto out; 2456 } 2457 2458 ret = dpcm_be_dai_prepare(fe, stream); 2459 if (ret < 0) 2460 goto out; 2461 2462 /* call prepare on the frontend */ 2463 ret = __soc_pcm_prepare(fe, substream); 2464 if (ret < 0) 2465 goto out; 2466 2467 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2468 2469 out: 2470 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2471 snd_soc_dpcm_mutex_unlock(fe); 2472 2473 return soc_pcm_ret(fe, ret); 2474 } 2475 2476 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2477 { 2478 struct snd_pcm_substream *substream = 2479 snd_soc_dpcm_get_substream(fe, stream); 2480 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2481 int err; 2482 2483 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2484 stream ? "capture" : "playback", fe->dai_link->name); 2485 2486 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2487 /* call bespoke trigger - FE takes care of all BE triggers */ 2488 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2489 fe->dai_link->name); 2490 2491 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2492 } else { 2493 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2494 fe->dai_link->name); 2495 2496 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2497 } 2498 2499 dpcm_be_dai_hw_free(fe, stream); 2500 2501 dpcm_be_dai_shutdown(fe, stream); 2502 2503 /* run the stream event for each BE */ 2504 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2505 2506 return soc_pcm_ret(fe, err); 2507 } 2508 2509 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2510 { 2511 struct snd_pcm_substream *substream = 2512 snd_soc_dpcm_get_substream(fe, stream); 2513 struct snd_soc_dpcm *dpcm; 2514 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2515 int ret = 0; 2516 2517 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2518 stream ? "capture" : "playback", fe->dai_link->name); 2519 2520 /* Only start the BE if the FE is ready */ 2521 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2522 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2523 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2524 fe->dai_link->name, fe->dpcm[stream].state); 2525 ret = -EINVAL; 2526 goto disconnect; 2527 } 2528 2529 /* startup must always be called for new BEs */ 2530 ret = dpcm_be_dai_startup(fe, stream); 2531 if (ret < 0) 2532 goto disconnect; 2533 2534 /* keep going if FE state is > open */ 2535 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2536 return 0; 2537 2538 ret = dpcm_be_dai_hw_params(fe, stream); 2539 if (ret < 0) 2540 goto close; 2541 2542 /* keep going if FE state is > hw_params */ 2543 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2544 return 0; 2545 2546 ret = dpcm_be_dai_prepare(fe, stream); 2547 if (ret < 0) 2548 goto hw_free; 2549 2550 /* run the stream event for each BE */ 2551 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2552 2553 /* keep going if FE state is > prepare */ 2554 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2555 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2556 return 0; 2557 2558 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2559 /* call trigger on the frontend - FE takes care of all BE triggers */ 2560 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2561 fe->dai_link->name); 2562 2563 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2564 if (ret < 0) 2565 goto hw_free; 2566 } else { 2567 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2568 fe->dai_link->name); 2569 2570 ret = dpcm_be_dai_trigger(fe, stream, 2571 SNDRV_PCM_TRIGGER_START); 2572 if (ret < 0) 2573 goto hw_free; 2574 } 2575 2576 return 0; 2577 2578 hw_free: 2579 dpcm_be_dai_hw_free(fe, stream); 2580 close: 2581 dpcm_be_dai_shutdown(fe, stream); 2582 disconnect: 2583 /* disconnect any pending BEs */ 2584 for_each_dpcm_be(fe, stream, dpcm) { 2585 struct snd_soc_pcm_runtime *be = dpcm->be; 2586 2587 /* is this op for this BE ? */ 2588 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2589 continue; 2590 2591 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2592 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2593 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2594 } 2595 2596 return soc_pcm_ret(fe, ret); 2597 } 2598 2599 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2600 { 2601 struct snd_soc_dapm_widget_list *list; 2602 int stream; 2603 int count, paths; 2604 2605 if (!fe->dai_link->dynamic) 2606 return 0; 2607 2608 if (fe->dai_link->num_cpus > 1) { 2609 dev_err(fe->dev, 2610 "%s doesn't support Multi CPU yet\n", __func__); 2611 return -EINVAL; 2612 } 2613 2614 /* only check active links */ 2615 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2616 return 0; 2617 2618 /* DAPM sync will call this to update DSP paths */ 2619 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2620 new ? "new" : "old", fe->dai_link->name); 2621 2622 for_each_pcm_streams(stream) { 2623 2624 /* skip if FE doesn't have playback/capture capability */ 2625 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2626 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2627 continue; 2628 2629 /* skip if FE isn't currently playing/capturing */ 2630 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2631 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2632 continue; 2633 2634 paths = dpcm_path_get(fe, stream, &list); 2635 if (paths < 0) 2636 return paths; 2637 2638 /* update any playback/capture paths */ 2639 count = dpcm_process_paths(fe, stream, &list, new); 2640 if (count) { 2641 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2642 if (new) 2643 dpcm_run_update_startup(fe, stream); 2644 else 2645 dpcm_run_update_shutdown(fe, stream); 2646 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2647 2648 dpcm_clear_pending_state(fe, stream); 2649 dpcm_be_disconnect(fe, stream); 2650 } 2651 2652 dpcm_path_put(&list); 2653 } 2654 2655 return 0; 2656 } 2657 2658 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2659 * any DAI links. 2660 */ 2661 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2662 { 2663 struct snd_soc_pcm_runtime *fe; 2664 int ret = 0; 2665 2666 mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass); 2667 /* shutdown all old paths first */ 2668 for_each_card_rtds(card, fe) { 2669 ret = soc_dpcm_fe_runtime_update(fe, 0); 2670 if (ret) 2671 goto out; 2672 } 2673 2674 /* bring new paths up */ 2675 for_each_card_rtds(card, fe) { 2676 ret = soc_dpcm_fe_runtime_update(fe, 1); 2677 if (ret) 2678 goto out; 2679 } 2680 2681 out: 2682 mutex_unlock(&card->pcm_mutex); 2683 return ret; 2684 } 2685 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2686 2687 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2688 { 2689 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2690 struct snd_soc_dpcm *dpcm; 2691 int stream = fe_substream->stream; 2692 2693 snd_soc_dpcm_mutex_assert_held(fe); 2694 2695 /* mark FE's links ready to prune */ 2696 for_each_dpcm_be(fe, stream, dpcm) 2697 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2698 2699 dpcm_be_disconnect(fe, stream); 2700 2701 fe->dpcm[stream].runtime = NULL; 2702 } 2703 2704 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2705 { 2706 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2707 int ret; 2708 2709 snd_soc_dpcm_mutex_lock(fe); 2710 ret = dpcm_fe_dai_shutdown(fe_substream); 2711 2712 dpcm_fe_dai_cleanup(fe_substream); 2713 2714 snd_soc_dpcm_mutex_unlock(fe); 2715 return ret; 2716 } 2717 2718 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2719 { 2720 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2721 struct snd_soc_dapm_widget_list *list; 2722 int ret; 2723 int stream = fe_substream->stream; 2724 2725 snd_soc_dpcm_mutex_lock(fe); 2726 fe->dpcm[stream].runtime = fe_substream->runtime; 2727 2728 ret = dpcm_path_get(fe, stream, &list); 2729 if (ret < 0) 2730 goto open_end; 2731 2732 /* calculate valid and active FE <-> BE dpcms */ 2733 dpcm_process_paths(fe, stream, &list, 1); 2734 2735 ret = dpcm_fe_dai_startup(fe_substream); 2736 if (ret < 0) 2737 dpcm_fe_dai_cleanup(fe_substream); 2738 2739 dpcm_clear_pending_state(fe, stream); 2740 dpcm_path_put(&list); 2741 open_end: 2742 snd_soc_dpcm_mutex_unlock(fe); 2743 return ret; 2744 } 2745 2746 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2747 int *playback, int *capture) 2748 { 2749 struct snd_soc_dai *cpu_dai; 2750 int i; 2751 2752 if (rtd->dai_link->dynamic && rtd->dai_link->num_cpus > 1) { 2753 dev_err(rtd->dev, 2754 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2755 return -EINVAL; 2756 } 2757 2758 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2759 int stream; 2760 2761 if (rtd->dai_link->dpcm_playback) { 2762 stream = SNDRV_PCM_STREAM_PLAYBACK; 2763 2764 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2765 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2766 *playback = 1; 2767 break; 2768 } 2769 } 2770 if (!*playback) { 2771 dev_err(rtd->card->dev, 2772 "No CPU DAIs support playback for stream %s\n", 2773 rtd->dai_link->stream_name); 2774 return -EINVAL; 2775 } 2776 } 2777 if (rtd->dai_link->dpcm_capture) { 2778 stream = SNDRV_PCM_STREAM_CAPTURE; 2779 2780 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2781 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2782 *capture = 1; 2783 break; 2784 } 2785 } 2786 2787 if (!*capture) { 2788 dev_err(rtd->card->dev, 2789 "No CPU DAIs support capture for stream %s\n", 2790 rtd->dai_link->stream_name); 2791 return -EINVAL; 2792 } 2793 } 2794 } else { 2795 struct snd_soc_dai *codec_dai; 2796 2797 /* Adapt stream for codec2codec links */ 2798 int cpu_capture = rtd->dai_link->params ? 2799 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2800 int cpu_playback = rtd->dai_link->params ? 2801 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2802 2803 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2804 if (rtd->dai_link->num_cpus == 1) { 2805 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2806 } else if (rtd->dai_link->num_cpus == rtd->dai_link->num_codecs) { 2807 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2808 } else { 2809 dev_err(rtd->card->dev, 2810 "N cpus to M codecs link is not supported yet\n"); 2811 return -EINVAL; 2812 } 2813 2814 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2815 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2816 *playback = 1; 2817 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2818 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2819 *capture = 1; 2820 } 2821 } 2822 2823 if (rtd->dai_link->playback_only) { 2824 *playback = 1; 2825 *capture = 0; 2826 } 2827 2828 if (rtd->dai_link->capture_only) { 2829 *playback = 0; 2830 *capture = 1; 2831 } 2832 2833 return 0; 2834 } 2835 2836 static int soc_create_pcm(struct snd_pcm **pcm, 2837 struct snd_soc_pcm_runtime *rtd, 2838 int playback, int capture, int num) 2839 { 2840 char new_name[64]; 2841 int ret; 2842 2843 /* create the PCM */ 2844 if (rtd->dai_link->params) { 2845 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2846 rtd->dai_link->stream_name); 2847 2848 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2849 playback, capture, pcm); 2850 } else if (rtd->dai_link->no_pcm) { 2851 snprintf(new_name, sizeof(new_name), "(%s)", 2852 rtd->dai_link->stream_name); 2853 2854 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2855 playback, capture, pcm); 2856 } else { 2857 if (rtd->dai_link->dynamic) 2858 snprintf(new_name, sizeof(new_name), "%s (*)", 2859 rtd->dai_link->stream_name); 2860 else 2861 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2862 rtd->dai_link->stream_name, 2863 soc_codec_dai_name(rtd), num); 2864 2865 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2866 capture, pcm); 2867 } 2868 if (ret < 0) { 2869 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2870 new_name, rtd->dai_link->name, ret); 2871 return ret; 2872 } 2873 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2874 2875 return 0; 2876 } 2877 2878 /* create a new pcm */ 2879 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2880 { 2881 struct snd_soc_component *component; 2882 struct snd_pcm *pcm; 2883 int ret = 0, playback = 0, capture = 0; 2884 int i; 2885 2886 ret = soc_get_playback_capture(rtd, &playback, &capture); 2887 if (ret < 0) 2888 return ret; 2889 2890 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2891 if (ret < 0) 2892 return ret; 2893 2894 /* DAPM dai link stream work */ 2895 /* 2896 * Currently nothing to do for c2c links 2897 * Since c2c links are internal nodes in the DAPM graph and 2898 * don't interface with the outside world or application layer 2899 * we don't have to do any special handling on close. 2900 */ 2901 if (!rtd->dai_link->params) 2902 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2903 2904 rtd->pcm = pcm; 2905 pcm->nonatomic = rtd->dai_link->nonatomic; 2906 pcm->private_data = rtd; 2907 pcm->no_device_suspend = true; 2908 2909 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2910 if (playback) 2911 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2912 if (capture) 2913 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2914 goto out; 2915 } 2916 2917 /* ASoC PCM operations */ 2918 if (rtd->dai_link->dynamic) { 2919 rtd->ops.open = dpcm_fe_dai_open; 2920 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2921 rtd->ops.prepare = dpcm_fe_dai_prepare; 2922 rtd->ops.trigger = dpcm_fe_dai_trigger; 2923 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2924 rtd->ops.close = dpcm_fe_dai_close; 2925 rtd->ops.pointer = soc_pcm_pointer; 2926 } else { 2927 rtd->ops.open = soc_pcm_open; 2928 rtd->ops.hw_params = soc_pcm_hw_params; 2929 rtd->ops.prepare = soc_pcm_prepare; 2930 rtd->ops.trigger = soc_pcm_trigger; 2931 rtd->ops.hw_free = soc_pcm_hw_free; 2932 rtd->ops.close = soc_pcm_close; 2933 rtd->ops.pointer = soc_pcm_pointer; 2934 } 2935 2936 for_each_rtd_components(rtd, i, component) { 2937 const struct snd_soc_component_driver *drv = component->driver; 2938 2939 if (drv->ioctl) 2940 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2941 if (drv->sync_stop) 2942 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2943 if (drv->copy_user) 2944 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2945 if (drv->page) 2946 rtd->ops.page = snd_soc_pcm_component_page; 2947 if (drv->mmap) 2948 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2949 if (drv->ack) 2950 rtd->ops.ack = snd_soc_pcm_component_ack; 2951 } 2952 2953 if (playback) 2954 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2955 2956 if (capture) 2957 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2958 2959 ret = snd_soc_pcm_component_new(rtd); 2960 if (ret < 0) 2961 return ret; 2962 out: 2963 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2964 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2965 return ret; 2966 } 2967 2968 /* is the current PCM operation for this FE ? */ 2969 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2970 { 2971 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2972 return 1; 2973 return 0; 2974 } 2975 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2976 2977 /* is the current PCM operation for this BE ? */ 2978 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2979 struct snd_soc_pcm_runtime *be, int stream) 2980 { 2981 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2982 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2983 be->dpcm[stream].runtime_update)) 2984 return 1; 2985 return 0; 2986 } 2987 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2988 2989 /* get the substream for this BE */ 2990 struct snd_pcm_substream * 2991 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2992 { 2993 return be->pcm->streams[stream].substream; 2994 } 2995 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2996 2997 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 2998 struct snd_soc_pcm_runtime *be, 2999 int stream, 3000 const enum snd_soc_dpcm_state *states, 3001 int num_states) 3002 { 3003 struct snd_soc_dpcm *dpcm; 3004 int state; 3005 int ret = 1; 3006 int i; 3007 3008 for_each_dpcm_fe(be, stream, dpcm) { 3009 3010 if (dpcm->fe == fe) 3011 continue; 3012 3013 state = dpcm->fe->dpcm[stream].state; 3014 for (i = 0; i < num_states; i++) { 3015 if (state == states[i]) { 3016 ret = 0; 3017 break; 3018 } 3019 } 3020 } 3021 3022 /* it's safe to do this BE DAI */ 3023 return ret; 3024 } 3025 3026 /* 3027 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3028 * are not running, paused or suspended for the specified stream direction. 3029 */ 3030 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3031 struct snd_soc_pcm_runtime *be, int stream) 3032 { 3033 const enum snd_soc_dpcm_state state[] = { 3034 SND_SOC_DPCM_STATE_START, 3035 SND_SOC_DPCM_STATE_PAUSED, 3036 SND_SOC_DPCM_STATE_SUSPEND, 3037 }; 3038 3039 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3040 } 3041 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3042 3043 /* 3044 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3045 * running, paused or suspended for the specified stream direction. 3046 */ 3047 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3048 struct snd_soc_pcm_runtime *be, int stream) 3049 { 3050 const enum snd_soc_dpcm_state state[] = { 3051 SND_SOC_DPCM_STATE_START, 3052 SND_SOC_DPCM_STATE_PAUSED, 3053 SND_SOC_DPCM_STATE_SUSPEND, 3054 SND_SOC_DPCM_STATE_PREPARE, 3055 }; 3056 3057 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3058 } 3059 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3060