1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // soc-pcm.c -- ALSA SoC PCM 4 // 5 // Copyright 2005 Wolfson Microelectronics PLC. 6 // Copyright 2005 Openedhand Ltd. 7 // Copyright (C) 2010 Slimlogic Ltd. 8 // Copyright (C) 2010 Texas Instruments Inc. 9 // 10 // Authors: Liam Girdwood <lrg@ti.com> 11 // Mark Brown <broonie@opensource.wolfsonmicro.com> 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/pinctrl/consumer.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/slab.h> 19 #include <linux/workqueue.h> 20 #include <linux/export.h> 21 #include <linux/debugfs.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/soc-dpcm.h> 27 #include <sound/soc-link.h> 28 #include <sound/initval.h> 29 30 #define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret) 31 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd, 32 const char *func, int ret) 33 { 34 /* Positive, Zero values are not errors */ 35 if (ret >= 0) 36 return ret; 37 38 /* Negative values might be errors */ 39 switch (ret) { 40 case -EPROBE_DEFER: 41 case -ENOTSUPP: 42 break; 43 default: 44 dev_err(rtd->dev, 45 "ASoC: error at %s on %s: %d\n", 46 func, rtd->dai_link->name, ret); 47 } 48 49 return ret; 50 } 51 52 static inline void snd_soc_dpcm_mutex_lock(struct snd_soc_pcm_runtime *rtd) 53 { 54 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 55 } 56 57 static inline void snd_soc_dpcm_mutex_unlock(struct snd_soc_pcm_runtime *rtd) 58 { 59 mutex_unlock(&rtd->card->pcm_mutex); 60 } 61 62 #define snd_soc_dpcm_mutex_assert_held(rtd) \ 63 lockdep_assert_held(&(rtd)->card->pcm_mutex) 64 65 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd, 66 int stream) 67 { 68 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 69 } 70 71 #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \ 72 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags) 73 74 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd, 75 int stream) 76 { 77 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 78 } 79 80 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \ 81 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags) 82 83 #define DPCM_MAX_BE_USERS 8 84 85 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 86 { 87 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 88 } 89 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 90 { 91 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 92 } 93 94 #ifdef CONFIG_DEBUG_FS 95 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 96 { 97 switch (state) { 98 case SND_SOC_DPCM_STATE_NEW: 99 return "new"; 100 case SND_SOC_DPCM_STATE_OPEN: 101 return "open"; 102 case SND_SOC_DPCM_STATE_HW_PARAMS: 103 return "hw_params"; 104 case SND_SOC_DPCM_STATE_PREPARE: 105 return "prepare"; 106 case SND_SOC_DPCM_STATE_START: 107 return "start"; 108 case SND_SOC_DPCM_STATE_STOP: 109 return "stop"; 110 case SND_SOC_DPCM_STATE_SUSPEND: 111 return "suspend"; 112 case SND_SOC_DPCM_STATE_PAUSED: 113 return "paused"; 114 case SND_SOC_DPCM_STATE_HW_FREE: 115 return "hw_free"; 116 case SND_SOC_DPCM_STATE_CLOSE: 117 return "close"; 118 } 119 120 return "unknown"; 121 } 122 123 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 124 int stream, char *buf, size_t size) 125 { 126 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 127 struct snd_soc_dpcm *dpcm; 128 ssize_t offset = 0; 129 130 /* FE state */ 131 offset += scnprintf(buf + offset, size - offset, 132 "[%s - %s]\n", fe->dai_link->name, 133 stream ? "Capture" : "Playback"); 134 135 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 136 dpcm_state_string(fe->dpcm[stream].state)); 137 138 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 139 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 140 offset += scnprintf(buf + offset, size - offset, 141 "Hardware Params: " 142 "Format = %s, Channels = %d, Rate = %d\n", 143 snd_pcm_format_name(params_format(params)), 144 params_channels(params), 145 params_rate(params)); 146 147 /* BEs state */ 148 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 149 150 if (list_empty(&fe->dpcm[stream].be_clients)) { 151 offset += scnprintf(buf + offset, size - offset, 152 " No active DSP links\n"); 153 goto out; 154 } 155 156 for_each_dpcm_be(fe, stream, dpcm) { 157 struct snd_soc_pcm_runtime *be = dpcm->be; 158 params = &be->dpcm[stream].hw_params; 159 160 offset += scnprintf(buf + offset, size - offset, 161 "- %s\n", be->dai_link->name); 162 163 offset += scnprintf(buf + offset, size - offset, 164 " State: %s\n", 165 dpcm_state_string(be->dpcm[stream].state)); 166 167 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 168 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 169 offset += scnprintf(buf + offset, size - offset, 170 " Hardware Params: " 171 "Format = %s, Channels = %d, Rate = %d\n", 172 snd_pcm_format_name(params_format(params)), 173 params_channels(params), 174 params_rate(params)); 175 } 176 out: 177 return offset; 178 } 179 180 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 181 size_t count, loff_t *ppos) 182 { 183 struct snd_soc_pcm_runtime *fe = file->private_data; 184 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 185 int stream; 186 char *buf; 187 188 if (fe->dai_link->num_cpus > 1) { 189 dev_err(fe->dev, 190 "%s doesn't support Multi CPU yet\n", __func__); 191 return -EINVAL; 192 } 193 194 buf = kmalloc(out_count, GFP_KERNEL); 195 if (!buf) 196 return -ENOMEM; 197 198 snd_soc_dpcm_mutex_lock(fe); 199 for_each_pcm_streams(stream) 200 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 201 offset += dpcm_show_state(fe, stream, 202 buf + offset, 203 out_count - offset); 204 snd_soc_dpcm_mutex_unlock(fe); 205 206 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 207 208 kfree(buf); 209 return ret; 210 } 211 212 static const struct file_operations dpcm_state_fops = { 213 .open = simple_open, 214 .read = dpcm_state_read_file, 215 .llseek = default_llseek, 216 }; 217 218 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 219 { 220 if (!rtd->dai_link->dynamic) 221 return; 222 223 if (!rtd->card->debugfs_card_root) 224 return; 225 226 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 227 rtd->card->debugfs_card_root); 228 229 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 230 rtd, &dpcm_state_fops); 231 } 232 233 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 234 { 235 char *name; 236 237 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 238 stream ? "capture" : "playback"); 239 if (name) { 240 dpcm->debugfs_state = debugfs_create_dir( 241 name, dpcm->fe->debugfs_dpcm_root); 242 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 243 &dpcm->state); 244 kfree(name); 245 } 246 } 247 248 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 249 { 250 debugfs_remove_recursive(dpcm->debugfs_state); 251 } 252 253 #else 254 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 255 int stream) 256 { 257 } 258 259 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 260 { 261 } 262 #endif 263 264 /* Set FE's runtime_update state; the state is protected via PCM stream lock 265 * for avoiding the race with trigger callback. 266 * If the state is unset and a trigger is pending while the previous operation, 267 * process the pending trigger action here. 268 */ 269 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 270 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 271 int stream, enum snd_soc_dpcm_update state) 272 { 273 struct snd_pcm_substream *substream = 274 snd_soc_dpcm_get_substream(fe, stream); 275 276 snd_soc_dpcm_stream_lock_irq(fe, stream); 277 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 278 dpcm_fe_dai_do_trigger(substream, 279 fe->dpcm[stream].trigger_pending - 1); 280 fe->dpcm[stream].trigger_pending = 0; 281 } 282 fe->dpcm[stream].runtime_update = state; 283 snd_soc_dpcm_stream_unlock_irq(fe, stream); 284 } 285 286 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 287 int stream, enum snd_soc_dpcm_update state) 288 { 289 be->dpcm[stream].runtime_update = state; 290 } 291 292 /** 293 * snd_soc_runtime_action() - Increment/Decrement active count for 294 * PCM runtime components 295 * @rtd: ASoC PCM runtime that is activated 296 * @stream: Direction of the PCM stream 297 * @action: Activate stream if 1. Deactivate if -1. 298 * 299 * Increments/Decrements the active count for all the DAIs and components 300 * attached to a PCM runtime. 301 * Should typically be called when a stream is opened. 302 * 303 * Must be called with the rtd->card->pcm_mutex being held 304 */ 305 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 306 int stream, int action) 307 { 308 struct snd_soc_dai *dai; 309 int i; 310 311 snd_soc_dpcm_mutex_assert_held(rtd); 312 313 for_each_rtd_dais(rtd, i, dai) 314 snd_soc_dai_action(dai, stream, action); 315 } 316 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 317 318 /** 319 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 320 * @rtd: The ASoC PCM runtime that should be checked. 321 * 322 * This function checks whether the power down delay should be ignored for a 323 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 324 * been configured to ignore the delay, or if none of the components benefits 325 * from having the delay. 326 */ 327 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 328 { 329 struct snd_soc_component *component; 330 bool ignore = true; 331 int i; 332 333 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 334 return true; 335 336 for_each_rtd_components(rtd, i, component) 337 ignore &= !component->driver->use_pmdown_time; 338 339 return ignore; 340 } 341 342 /** 343 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 344 * @substream: the pcm substream 345 * @hw: the hardware parameters 346 * 347 * Sets the substream runtime hardware parameters. 348 */ 349 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 350 const struct snd_pcm_hardware *hw) 351 { 352 substream->runtime->hw = *hw; 353 354 return 0; 355 } 356 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 357 358 /* DPCM stream event, send event to FE and all active BEs. */ 359 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 360 int event) 361 { 362 struct snd_soc_dpcm *dpcm; 363 364 snd_soc_dpcm_mutex_assert_held(fe); 365 366 for_each_dpcm_be(fe, dir, dpcm) { 367 368 struct snd_soc_pcm_runtime *be = dpcm->be; 369 370 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 371 be->dai_link->name, event, dir); 372 373 if ((event == SND_SOC_DAPM_STREAM_STOP) && 374 (be->dpcm[dir].users >= 1)) 375 continue; 376 377 snd_soc_dapm_stream_event(be, dir, event); 378 } 379 380 snd_soc_dapm_stream_event(fe, dir, event); 381 382 return 0; 383 } 384 385 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 386 struct snd_pcm_hw_params *params) 387 { 388 if (params) { 389 dai->rate = params_rate(params); 390 dai->channels = params_channels(params); 391 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 392 } else { 393 dai->rate = 0; 394 dai->channels = 0; 395 dai->sample_bits = 0; 396 } 397 } 398 399 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 400 struct snd_soc_dai *soc_dai) 401 { 402 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 403 int ret; 404 405 if (!snd_soc_dai_active(soc_dai)) 406 return 0; 407 408 #define __soc_pcm_apply_symmetry(name, NAME) \ 409 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 410 rtd->dai_link->symmetric_##name)) { \ 411 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 412 #name, soc_dai->name); \ 413 \ 414 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 415 SNDRV_PCM_HW_PARAM_##NAME,\ 416 soc_dai->name); \ 417 if (ret < 0) { \ 418 dev_err(soc_dai->dev, \ 419 "ASoC: Unable to apply %s constraint: %d\n",\ 420 #name, ret); \ 421 return ret; \ 422 } \ 423 } 424 425 __soc_pcm_apply_symmetry(rate, RATE); 426 __soc_pcm_apply_symmetry(channels, CHANNELS); 427 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 428 429 return 0; 430 } 431 432 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 433 struct snd_pcm_hw_params *params) 434 { 435 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 436 struct snd_soc_dai d; 437 struct snd_soc_dai *dai; 438 struct snd_soc_dai *cpu_dai; 439 unsigned int symmetry, i; 440 441 d.name = __func__; 442 soc_pcm_set_dai_params(&d, params); 443 444 #define __soc_pcm_params_symmetry(xxx) \ 445 symmetry = rtd->dai_link->symmetric_##xxx; \ 446 for_each_rtd_dais(rtd, i, dai) \ 447 symmetry |= dai->driver->symmetric_##xxx; \ 448 \ 449 if (symmetry) \ 450 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 451 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 452 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 453 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 454 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 455 return -EINVAL; \ 456 } 457 458 /* reject unmatched parameters when applying symmetry */ 459 __soc_pcm_params_symmetry(rate); 460 __soc_pcm_params_symmetry(channels); 461 __soc_pcm_params_symmetry(sample_bits); 462 463 return 0; 464 } 465 466 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 467 { 468 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 469 struct snd_soc_dai_link *link = rtd->dai_link; 470 struct snd_soc_dai *dai; 471 unsigned int symmetry, i; 472 473 symmetry = link->symmetric_rate || 474 link->symmetric_channels || 475 link->symmetric_sample_bits; 476 477 for_each_rtd_dais(rtd, i, dai) 478 symmetry = symmetry || 479 dai->driver->symmetric_rate || 480 dai->driver->symmetric_channels || 481 dai->driver->symmetric_sample_bits; 482 483 if (symmetry) 484 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 485 } 486 487 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 488 { 489 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 490 int ret; 491 492 if (!bits) 493 return; 494 495 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 496 if (ret != 0) 497 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 498 bits, ret); 499 } 500 501 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 502 { 503 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 504 struct snd_soc_dai *cpu_dai; 505 struct snd_soc_dai *codec_dai; 506 int stream = substream->stream; 507 int i; 508 unsigned int bits = 0, cpu_bits = 0; 509 510 for_each_rtd_codec_dais(rtd, i, codec_dai) { 511 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 512 513 if (pcm_codec->sig_bits == 0) { 514 bits = 0; 515 break; 516 } 517 bits = max(pcm_codec->sig_bits, bits); 518 } 519 520 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 521 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 522 523 if (pcm_cpu->sig_bits == 0) { 524 cpu_bits = 0; 525 break; 526 } 527 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 528 } 529 530 soc_pcm_set_msb(substream, bits); 531 soc_pcm_set_msb(substream, cpu_bits); 532 } 533 534 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 535 { 536 hw->rates = UINT_MAX; 537 hw->rate_min = 0; 538 hw->rate_max = UINT_MAX; 539 hw->channels_min = 0; 540 hw->channels_max = UINT_MAX; 541 hw->formats = ULLONG_MAX; 542 } 543 544 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 545 struct snd_soc_pcm_stream *p) 546 { 547 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 548 549 /* setup hw->rate_min/max via hw->rates first */ 550 snd_pcm_hw_limit_rates(hw); 551 552 /* update hw->rate_min/max by snd_soc_pcm_stream */ 553 hw->rate_min = max(hw->rate_min, p->rate_min); 554 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 555 } 556 557 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 558 struct snd_soc_pcm_stream *p) 559 { 560 hw->channels_min = max(hw->channels_min, p->channels_min); 561 hw->channels_max = min(hw->channels_max, p->channels_max); 562 } 563 564 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 565 struct snd_soc_pcm_stream *p) 566 { 567 hw->formats &= p->formats; 568 } 569 570 /** 571 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 572 * @rtd: ASoC PCM runtime 573 * @hw: PCM hardware parameters (output) 574 * @stream: Direction of the PCM stream 575 * 576 * Calculates the subset of stream parameters supported by all DAIs 577 * associated with the PCM stream. 578 */ 579 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 580 struct snd_pcm_hardware *hw, int stream) 581 { 582 struct snd_soc_dai *codec_dai; 583 struct snd_soc_dai *cpu_dai; 584 struct snd_soc_pcm_stream *codec_stream; 585 struct snd_soc_pcm_stream *cpu_stream; 586 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 587 int i; 588 589 soc_pcm_hw_init(hw); 590 591 /* first calculate min/max only for CPUs in the DAI link */ 592 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 593 594 /* 595 * Skip CPUs which don't support the current stream type. 596 * Otherwise, since the rate, channel, and format values will 597 * zero in that case, we would have no usable settings left, 598 * causing the resulting setup to fail. 599 */ 600 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 601 continue; 602 603 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 604 605 soc_pcm_hw_update_chan(hw, cpu_stream); 606 soc_pcm_hw_update_rate(hw, cpu_stream); 607 soc_pcm_hw_update_format(hw, cpu_stream); 608 } 609 cpu_chan_min = hw->channels_min; 610 cpu_chan_max = hw->channels_max; 611 612 /* second calculate min/max only for CODECs in the DAI link */ 613 for_each_rtd_codec_dais(rtd, i, codec_dai) { 614 615 /* 616 * Skip CODECs which don't support the current stream type. 617 * Otherwise, since the rate, channel, and format values will 618 * zero in that case, we would have no usable settings left, 619 * causing the resulting setup to fail. 620 */ 621 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 622 continue; 623 624 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 625 626 soc_pcm_hw_update_chan(hw, codec_stream); 627 soc_pcm_hw_update_rate(hw, codec_stream); 628 soc_pcm_hw_update_format(hw, codec_stream); 629 } 630 631 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 632 if (!hw->channels_min) 633 return -EINVAL; 634 635 /* 636 * chan min/max cannot be enforced if there are multiple CODEC DAIs 637 * connected to CPU DAI(s), use CPU DAI's directly and let 638 * channel allocation be fixed up later 639 */ 640 if (rtd->dai_link->num_codecs > 1) { 641 hw->channels_min = cpu_chan_min; 642 hw->channels_max = cpu_chan_max; 643 } 644 645 return 0; 646 } 647 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 648 649 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 650 { 651 struct snd_pcm_hardware *hw = &substream->runtime->hw; 652 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 653 u64 formats = hw->formats; 654 655 /* 656 * At least one CPU and one CODEC should match. Otherwise, we should 657 * have bailed out on a higher level, since there would be no CPU or 658 * CODEC to support the transfer direction in that case. 659 */ 660 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 661 662 if (formats) 663 hw->formats &= formats; 664 } 665 666 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 667 { 668 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 669 struct snd_soc_component *component; 670 int i, ret = 0; 671 672 for_each_rtd_components(rtd, i, component) { 673 ret = snd_soc_component_module_get_when_open(component, substream); 674 if (ret < 0) 675 break; 676 677 ret = snd_soc_component_open(component, substream); 678 if (ret < 0) 679 break; 680 } 681 682 return ret; 683 } 684 685 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 686 int rollback) 687 { 688 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 689 struct snd_soc_component *component; 690 int i, ret = 0; 691 692 for_each_rtd_components(rtd, i, component) { 693 int r = snd_soc_component_close(component, substream, rollback); 694 if (r < 0) 695 ret = r; /* use last ret */ 696 697 snd_soc_component_module_put_when_close(component, substream, rollback); 698 } 699 700 return ret; 701 } 702 703 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 704 struct snd_pcm_substream *substream, int rollback) 705 { 706 struct snd_soc_component *component; 707 struct snd_soc_dai *dai; 708 int i; 709 710 snd_soc_dpcm_mutex_assert_held(rtd); 711 712 if (!rollback) { 713 snd_soc_runtime_deactivate(rtd, substream->stream); 714 /* clear the corresponding DAIs parameters when going to be inactive */ 715 for_each_rtd_dais(rtd, i, dai) { 716 if (snd_soc_dai_active(dai) == 0) 717 soc_pcm_set_dai_params(dai, NULL); 718 719 if (snd_soc_dai_stream_active(dai, substream->stream) == 0) 720 snd_soc_dai_digital_mute(dai, 1, substream->stream); 721 } 722 } 723 724 for_each_rtd_dais(rtd, i, dai) 725 snd_soc_dai_shutdown(dai, substream, rollback); 726 727 snd_soc_link_shutdown(substream, rollback); 728 729 soc_pcm_components_close(substream, rollback); 730 731 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 732 733 for_each_rtd_components(rtd, i, component) 734 if (!snd_soc_component_active(component)) 735 pinctrl_pm_select_sleep_state(component->dev); 736 737 return 0; 738 } 739 740 /* 741 * Called by ALSA when a PCM substream is closed. Private data can be 742 * freed here. The cpu DAI, codec DAI, machine and components are also 743 * shutdown. 744 */ 745 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 746 struct snd_pcm_substream *substream) 747 { 748 return soc_pcm_clean(rtd, substream, 0); 749 } 750 751 /* PCM close ops for non-DPCM streams */ 752 static int soc_pcm_close(struct snd_pcm_substream *substream) 753 { 754 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 755 756 snd_soc_dpcm_mutex_lock(rtd); 757 __soc_pcm_close(rtd, substream); 758 snd_soc_dpcm_mutex_unlock(rtd); 759 return 0; 760 } 761 762 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 763 { 764 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 765 struct snd_pcm_hardware *hw = &substream->runtime->hw; 766 const char *name_cpu = soc_cpu_dai_name(rtd); 767 const char *name_codec = soc_codec_dai_name(rtd); 768 const char *err_msg; 769 struct device *dev = rtd->dev; 770 771 err_msg = "rates"; 772 if (!hw->rates) 773 goto config_err; 774 775 err_msg = "formats"; 776 if (!hw->formats) 777 goto config_err; 778 779 err_msg = "channels"; 780 if (!hw->channels_min || !hw->channels_max || 781 hw->channels_min > hw->channels_max) 782 goto config_err; 783 784 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 785 name_cpu); 786 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 787 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 788 hw->channels_max); 789 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 790 hw->rate_max); 791 792 return 0; 793 794 config_err: 795 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 796 name_codec, name_cpu, err_msg); 797 return -EINVAL; 798 } 799 800 /* 801 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 802 * then initialized and any private data can be allocated. This also calls 803 * startup for the cpu DAI, component, machine and codec DAI. 804 */ 805 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 806 struct snd_pcm_substream *substream) 807 { 808 struct snd_soc_component *component; 809 struct snd_soc_dai *dai; 810 int i, ret = 0; 811 812 snd_soc_dpcm_mutex_assert_held(rtd); 813 814 for_each_rtd_components(rtd, i, component) 815 pinctrl_pm_select_default_state(component->dev); 816 817 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 818 if (ret < 0) 819 goto err; 820 821 ret = soc_pcm_components_open(substream); 822 if (ret < 0) 823 goto err; 824 825 ret = snd_soc_link_startup(substream); 826 if (ret < 0) 827 goto err; 828 829 /* startup the audio subsystem */ 830 for_each_rtd_dais(rtd, i, dai) { 831 ret = snd_soc_dai_startup(dai, substream); 832 if (ret < 0) 833 goto err; 834 } 835 836 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 837 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 838 goto dynamic; 839 840 /* Check that the codec and cpu DAIs are compatible */ 841 soc_pcm_init_runtime_hw(substream); 842 843 soc_pcm_update_symmetry(substream); 844 845 ret = soc_hw_sanity_check(substream); 846 if (ret < 0) 847 goto err; 848 849 soc_pcm_apply_msb(substream); 850 851 /* Symmetry only applies if we've already got an active stream. */ 852 for_each_rtd_dais(rtd, i, dai) { 853 ret = soc_pcm_apply_symmetry(substream, dai); 854 if (ret != 0) 855 goto err; 856 } 857 dynamic: 858 snd_soc_runtime_activate(rtd, substream->stream); 859 ret = 0; 860 err: 861 if (ret < 0) 862 soc_pcm_clean(rtd, substream, 1); 863 864 return soc_pcm_ret(rtd, ret); 865 } 866 867 /* PCM open ops for non-DPCM streams */ 868 static int soc_pcm_open(struct snd_pcm_substream *substream) 869 { 870 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 871 int ret; 872 873 snd_soc_dpcm_mutex_lock(rtd); 874 ret = __soc_pcm_open(rtd, substream); 875 snd_soc_dpcm_mutex_unlock(rtd); 876 return ret; 877 } 878 879 /* 880 * Called by ALSA when the PCM substream is prepared, can set format, sample 881 * rate, etc. This function is non atomic and can be called multiple times, 882 * it can refer to the runtime info. 883 */ 884 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 885 struct snd_pcm_substream *substream) 886 { 887 struct snd_soc_dai *dai; 888 int i, ret = 0; 889 890 snd_soc_dpcm_mutex_assert_held(rtd); 891 892 ret = snd_soc_link_prepare(substream); 893 if (ret < 0) 894 goto out; 895 896 ret = snd_soc_pcm_component_prepare(substream); 897 if (ret < 0) 898 goto out; 899 900 ret = snd_soc_pcm_dai_prepare(substream); 901 if (ret < 0) 902 goto out; 903 904 /* cancel any delayed stream shutdown that is pending */ 905 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 906 rtd->pop_wait) { 907 rtd->pop_wait = 0; 908 cancel_delayed_work(&rtd->delayed_work); 909 } 910 911 snd_soc_dapm_stream_event(rtd, substream->stream, 912 SND_SOC_DAPM_STREAM_START); 913 914 for_each_rtd_dais(rtd, i, dai) 915 snd_soc_dai_digital_mute(dai, 0, substream->stream); 916 917 out: 918 return soc_pcm_ret(rtd, ret); 919 } 920 921 /* PCM prepare ops for non-DPCM streams */ 922 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 923 { 924 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 925 int ret; 926 927 snd_soc_dpcm_mutex_lock(rtd); 928 ret = __soc_pcm_prepare(rtd, substream); 929 snd_soc_dpcm_mutex_unlock(rtd); 930 return ret; 931 } 932 933 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 934 unsigned int mask) 935 { 936 struct snd_interval *interval; 937 int channels = hweight_long(mask); 938 939 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 940 interval->min = channels; 941 interval->max = channels; 942 } 943 944 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 945 struct snd_pcm_substream *substream, int rollback) 946 { 947 struct snd_soc_dai *dai; 948 int i; 949 950 snd_soc_dpcm_mutex_assert_held(rtd); 951 952 /* run the stream event */ 953 snd_soc_dapm_stream_stop(rtd, substream->stream); 954 955 /* free any machine hw params */ 956 snd_soc_link_hw_free(substream, rollback); 957 958 /* free any component resources */ 959 snd_soc_pcm_component_hw_free(substream, rollback); 960 961 /* now free hw params for the DAIs */ 962 for_each_rtd_dais(rtd, i, dai) 963 if (snd_soc_dai_stream_valid(dai, substream->stream)) 964 snd_soc_dai_hw_free(dai, substream, rollback); 965 966 return 0; 967 } 968 969 /* 970 * Frees resources allocated by hw_params, can be called multiple times 971 */ 972 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 973 struct snd_pcm_substream *substream) 974 { 975 return soc_pcm_hw_clean(rtd, substream, 0); 976 } 977 978 /* hw_free PCM ops for non-DPCM streams */ 979 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 980 { 981 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 982 int ret; 983 984 snd_soc_dpcm_mutex_lock(rtd); 985 ret = __soc_pcm_hw_free(rtd, substream); 986 snd_soc_dpcm_mutex_unlock(rtd); 987 return ret; 988 } 989 990 /* 991 * Called by ALSA when the hardware params are set by application. This 992 * function can also be called multiple times and can allocate buffers 993 * (using snd_pcm_lib_* ). It's non-atomic. 994 */ 995 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, 996 struct snd_pcm_substream *substream, 997 struct snd_pcm_hw_params *params) 998 { 999 struct snd_soc_dai *cpu_dai; 1000 struct snd_soc_dai *codec_dai; 1001 int i, ret = 0; 1002 1003 snd_soc_dpcm_mutex_assert_held(rtd); 1004 1005 ret = soc_pcm_params_symmetry(substream, params); 1006 if (ret) 1007 goto out; 1008 1009 ret = snd_soc_link_hw_params(substream, params); 1010 if (ret < 0) 1011 goto out; 1012 1013 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1014 struct snd_pcm_hw_params codec_params; 1015 1016 /* 1017 * Skip CODECs which don't support the current stream type, 1018 * the idea being that if a CODEC is not used for the currently 1019 * set up transfer direction, it should not need to be 1020 * configured, especially since the configuration used might 1021 * not even be supported by that CODEC. There may be cases 1022 * however where a CODEC needs to be set up although it is 1023 * actually not being used for the transfer, e.g. if a 1024 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1025 * for the DAI link including a playback-only CODEC. 1026 * If this becomes necessary, we will have to augment the 1027 * machine driver setup with information on how to act, so 1028 * we can do the right thing here. 1029 */ 1030 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1031 continue; 1032 1033 /* copy params for each codec */ 1034 codec_params = *params; 1035 1036 /* fixup params based on TDM slot masks */ 1037 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1038 codec_dai->tx_mask) 1039 soc_pcm_codec_params_fixup(&codec_params, 1040 codec_dai->tx_mask); 1041 1042 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 1043 codec_dai->rx_mask) 1044 soc_pcm_codec_params_fixup(&codec_params, 1045 codec_dai->rx_mask); 1046 1047 ret = snd_soc_dai_hw_params(codec_dai, substream, 1048 &codec_params); 1049 if(ret < 0) 1050 goto out; 1051 1052 soc_pcm_set_dai_params(codec_dai, &codec_params); 1053 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 1054 } 1055 1056 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1057 /* 1058 * Skip CPUs which don't support the current stream 1059 * type. See soc_pcm_init_runtime_hw() for more details 1060 */ 1061 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1062 continue; 1063 1064 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 1065 if (ret < 0) 1066 goto out; 1067 1068 /* store the parameters for each DAI */ 1069 soc_pcm_set_dai_params(cpu_dai, params); 1070 snd_soc_dapm_update_dai(substream, params, cpu_dai); 1071 } 1072 1073 ret = snd_soc_pcm_component_hw_params(substream, params); 1074 out: 1075 if (ret < 0) 1076 soc_pcm_hw_clean(rtd, substream, 1); 1077 1078 return soc_pcm_ret(rtd, ret); 1079 } 1080 1081 /* hw_params PCM ops for non-DPCM streams */ 1082 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1083 struct snd_pcm_hw_params *params) 1084 { 1085 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1086 int ret; 1087 1088 snd_soc_dpcm_mutex_lock(rtd); 1089 ret = __soc_pcm_hw_params(rtd, substream, params); 1090 snd_soc_dpcm_mutex_unlock(rtd); 1091 return ret; 1092 } 1093 1094 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1095 { 1096 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1097 int ret = -EINVAL, _ret = 0; 1098 int rollback = 0; 1099 1100 switch (cmd) { 1101 case SNDRV_PCM_TRIGGER_START: 1102 case SNDRV_PCM_TRIGGER_RESUME: 1103 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1104 ret = snd_soc_link_trigger(substream, cmd, 0); 1105 if (ret < 0) 1106 goto start_err; 1107 1108 ret = snd_soc_pcm_component_trigger(substream, cmd, 0); 1109 if (ret < 0) 1110 goto start_err; 1111 1112 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); 1113 start_err: 1114 if (ret < 0) 1115 rollback = 1; 1116 } 1117 1118 if (rollback) { 1119 _ret = ret; 1120 switch (cmd) { 1121 case SNDRV_PCM_TRIGGER_START: 1122 cmd = SNDRV_PCM_TRIGGER_STOP; 1123 break; 1124 case SNDRV_PCM_TRIGGER_RESUME: 1125 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1126 break; 1127 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1128 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1129 break; 1130 } 1131 } 1132 1133 switch (cmd) { 1134 case SNDRV_PCM_TRIGGER_STOP: 1135 case SNDRV_PCM_TRIGGER_SUSPEND: 1136 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1137 if (rtd->dai_link->stop_dma_first) { 1138 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1139 if (ret < 0) 1140 break; 1141 1142 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1143 if (ret < 0) 1144 break; 1145 } else { 1146 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1147 if (ret < 0) 1148 break; 1149 1150 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1151 if (ret < 0) 1152 break; 1153 } 1154 ret = snd_soc_link_trigger(substream, cmd, rollback); 1155 break; 1156 } 1157 1158 if (_ret) 1159 ret = _ret; 1160 1161 return ret; 1162 } 1163 1164 /* 1165 * soc level wrapper for pointer callback 1166 * If cpu_dai, codec_dai, component driver has the delay callback, then 1167 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1168 */ 1169 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1170 { 1171 struct snd_pcm_runtime *runtime = substream->runtime; 1172 snd_pcm_uframes_t offset = 0; 1173 snd_pcm_sframes_t codec_delay = 0; 1174 snd_pcm_sframes_t cpu_delay = 0; 1175 1176 offset = snd_soc_pcm_component_pointer(substream); 1177 1178 /* should be called *after* snd_soc_pcm_component_pointer() */ 1179 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1180 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1181 1182 runtime->delay = cpu_delay + codec_delay; 1183 1184 return offset; 1185 } 1186 1187 /* connect a FE and BE */ 1188 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1189 struct snd_soc_pcm_runtime *be, int stream) 1190 { 1191 struct snd_pcm_substream *fe_substream; 1192 struct snd_pcm_substream *be_substream; 1193 struct snd_soc_dpcm *dpcm; 1194 1195 snd_soc_dpcm_mutex_assert_held(fe); 1196 1197 /* only add new dpcms */ 1198 for_each_dpcm_be(fe, stream, dpcm) { 1199 if (dpcm->be == be && dpcm->fe == fe) 1200 return 0; 1201 } 1202 1203 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1204 be_substream = snd_soc_dpcm_get_substream(be, stream); 1205 1206 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { 1207 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", 1208 __func__); 1209 return -EINVAL; 1210 } 1211 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1212 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1213 be_substream->pcm->nonatomic = 1; 1214 } 1215 1216 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1217 if (!dpcm) 1218 return -ENOMEM; 1219 1220 dpcm->be = be; 1221 dpcm->fe = fe; 1222 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1223 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1224 snd_soc_dpcm_stream_lock_irq(fe, stream); 1225 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1226 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1227 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1228 1229 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1230 stream ? "capture" : "playback", fe->dai_link->name, 1231 stream ? "<-" : "->", be->dai_link->name); 1232 1233 dpcm_create_debugfs_state(dpcm, stream); 1234 1235 return 1; 1236 } 1237 1238 /* reparent a BE onto another FE */ 1239 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1240 struct snd_soc_pcm_runtime *be, int stream) 1241 { 1242 struct snd_soc_dpcm *dpcm; 1243 struct snd_pcm_substream *fe_substream, *be_substream; 1244 1245 /* reparent if BE is connected to other FEs */ 1246 if (!be->dpcm[stream].users) 1247 return; 1248 1249 be_substream = snd_soc_dpcm_get_substream(be, stream); 1250 if (!be_substream) 1251 return; 1252 1253 for_each_dpcm_fe(be, stream, dpcm) { 1254 if (dpcm->fe == fe) 1255 continue; 1256 1257 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1258 stream ? "capture" : "playback", 1259 dpcm->fe->dai_link->name, 1260 stream ? "<-" : "->", dpcm->be->dai_link->name); 1261 1262 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1263 be_substream->runtime = fe_substream->runtime; 1264 break; 1265 } 1266 } 1267 1268 /* disconnect a BE and FE */ 1269 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1270 { 1271 struct snd_soc_dpcm *dpcm, *d; 1272 LIST_HEAD(deleted_dpcms); 1273 1274 snd_soc_dpcm_mutex_assert_held(fe); 1275 1276 snd_soc_dpcm_stream_lock_irq(fe, stream); 1277 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1278 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1279 stream ? "capture" : "playback", 1280 dpcm->be->dai_link->name); 1281 1282 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1283 continue; 1284 1285 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1286 stream ? "capture" : "playback", fe->dai_link->name, 1287 stream ? "<-" : "->", dpcm->be->dai_link->name); 1288 1289 /* BEs still alive need new FE */ 1290 dpcm_be_reparent(fe, dpcm->be, stream); 1291 1292 list_del(&dpcm->list_be); 1293 list_move(&dpcm->list_fe, &deleted_dpcms); 1294 } 1295 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1296 1297 while (!list_empty(&deleted_dpcms)) { 1298 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1299 list_fe); 1300 list_del(&dpcm->list_fe); 1301 dpcm_remove_debugfs_state(dpcm); 1302 kfree(dpcm); 1303 } 1304 } 1305 1306 /* get BE for DAI widget and stream */ 1307 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1308 struct snd_soc_dapm_widget *widget, int stream) 1309 { 1310 struct snd_soc_pcm_runtime *be; 1311 struct snd_soc_dapm_widget *w; 1312 struct snd_soc_dai *dai; 1313 int i; 1314 1315 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1316 1317 for_each_card_rtds(card, be) { 1318 1319 if (!be->dai_link->no_pcm) 1320 continue; 1321 1322 if (!snd_soc_dpcm_get_substream(be, stream)) 1323 continue; 1324 1325 for_each_rtd_dais(be, i, dai) { 1326 w = snd_soc_dai_get_widget(dai, stream); 1327 1328 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1329 w ? w->name : "(not set)"); 1330 1331 if (w == widget) 1332 return be; 1333 } 1334 } 1335 1336 /* Widget provided is not a BE */ 1337 return NULL; 1338 } 1339 1340 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1341 struct snd_soc_dapm_widget *widget) 1342 { 1343 struct snd_soc_dapm_widget *w; 1344 int i; 1345 1346 for_each_dapm_widgets(list, i, w) 1347 if (widget == w) 1348 return 1; 1349 1350 return 0; 1351 } 1352 1353 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1354 { 1355 struct snd_soc_card *card = widget->dapm->card; 1356 struct snd_soc_pcm_runtime *rtd; 1357 int stream; 1358 1359 /* adjust dir to stream */ 1360 if (dir == SND_SOC_DAPM_DIR_OUT) 1361 stream = SNDRV_PCM_STREAM_PLAYBACK; 1362 else 1363 stream = SNDRV_PCM_STREAM_CAPTURE; 1364 1365 rtd = dpcm_get_be(card, widget, stream); 1366 if (rtd) 1367 return true; 1368 1369 return false; 1370 } 1371 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1372 1373 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1374 int stream, struct snd_soc_dapm_widget_list **list) 1375 { 1376 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1377 int paths; 1378 1379 if (fe->dai_link->num_cpus > 1) { 1380 dev_err(fe->dev, 1381 "%s doesn't support Multi CPU yet\n", __func__); 1382 return -EINVAL; 1383 } 1384 1385 /* get number of valid DAI paths and their widgets */ 1386 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1387 fe->card->component_chaining ? 1388 NULL : dpcm_end_walk_at_be); 1389 1390 if (paths > 0) 1391 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1392 stream ? "capture" : "playback"); 1393 else if (paths == 0) 1394 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1395 stream ? "capture" : "playback"); 1396 1397 return paths; 1398 } 1399 1400 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1401 { 1402 snd_soc_dapm_dai_free_widgets(list); 1403 } 1404 1405 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1406 struct snd_soc_dapm_widget_list *list) 1407 { 1408 struct snd_soc_dai *dai; 1409 unsigned int i; 1410 1411 /* is there a valid DAI widget for this BE */ 1412 for_each_rtd_dais(dpcm->be, i, dai) { 1413 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1414 1415 /* 1416 * The BE is pruned only if none of the dai 1417 * widgets are in the active list. 1418 */ 1419 if (widget && widget_in_list(list, widget)) 1420 return true; 1421 } 1422 1423 return false; 1424 } 1425 1426 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1427 struct snd_soc_dapm_widget_list **list_) 1428 { 1429 struct snd_soc_dpcm *dpcm; 1430 int prune = 0; 1431 1432 /* Destroy any old FE <--> BE connections */ 1433 for_each_dpcm_be(fe, stream, dpcm) { 1434 if (dpcm_be_is_active(dpcm, stream, *list_)) 1435 continue; 1436 1437 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1438 stream ? "capture" : "playback", 1439 dpcm->be->dai_link->name, fe->dai_link->name); 1440 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1441 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1442 prune++; 1443 } 1444 1445 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1446 return prune; 1447 } 1448 1449 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1450 struct snd_soc_dapm_widget_list **list_) 1451 { 1452 struct snd_soc_card *card = fe->card; 1453 struct snd_soc_dapm_widget_list *list = *list_; 1454 struct snd_soc_pcm_runtime *be; 1455 struct snd_soc_dapm_widget *widget; 1456 int i, new = 0, err; 1457 1458 /* don't connect if FE is not running */ 1459 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1460 return new; 1461 1462 /* Create any new FE <--> BE connections */ 1463 for_each_dapm_widgets(list, i, widget) { 1464 1465 switch (widget->id) { 1466 case snd_soc_dapm_dai_in: 1467 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1468 continue; 1469 break; 1470 case snd_soc_dapm_dai_out: 1471 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1472 continue; 1473 break; 1474 default: 1475 continue; 1476 } 1477 1478 /* is there a valid BE rtd for this widget */ 1479 be = dpcm_get_be(card, widget, stream); 1480 if (!be) { 1481 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1482 widget->name); 1483 continue; 1484 } 1485 1486 /* 1487 * Filter for systems with 'component_chaining' enabled. 1488 * This helps to avoid unnecessary re-configuration of an 1489 * already active BE on such systems. 1490 */ 1491 if (fe->card->component_chaining && 1492 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1493 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1494 continue; 1495 1496 /* newly connected FE and BE */ 1497 err = dpcm_be_connect(fe, be, stream); 1498 if (err < 0) { 1499 dev_err(fe->dev, "ASoC: can't connect %s\n", 1500 widget->name); 1501 break; 1502 } else if (err == 0) /* already connected */ 1503 continue; 1504 1505 /* new */ 1506 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1507 new++; 1508 } 1509 1510 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1511 return new; 1512 } 1513 1514 /* 1515 * Find the corresponding BE DAIs that source or sink audio to this 1516 * FE substream. 1517 */ 1518 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1519 int stream, struct snd_soc_dapm_widget_list **list, int new) 1520 { 1521 if (new) 1522 return dpcm_add_paths(fe, stream, list); 1523 else 1524 return dpcm_prune_paths(fe, stream, list); 1525 } 1526 1527 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1528 { 1529 struct snd_soc_dpcm *dpcm; 1530 1531 for_each_dpcm_be(fe, stream, dpcm) 1532 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1533 } 1534 1535 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1536 int do_hw_free, struct snd_soc_dpcm *last) 1537 { 1538 struct snd_soc_dpcm *dpcm; 1539 1540 /* disable any enabled and non active backends */ 1541 for_each_dpcm_be(fe, stream, dpcm) { 1542 struct snd_soc_pcm_runtime *be = dpcm->be; 1543 struct snd_pcm_substream *be_substream = 1544 snd_soc_dpcm_get_substream(be, stream); 1545 1546 if (dpcm == last) 1547 return; 1548 1549 /* is this op for this BE ? */ 1550 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1551 continue; 1552 1553 if (be->dpcm[stream].users == 0) { 1554 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1555 stream ? "capture" : "playback", 1556 be->dpcm[stream].state); 1557 continue; 1558 } 1559 1560 if (--be->dpcm[stream].users != 0) 1561 continue; 1562 1563 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1564 if (!do_hw_free) 1565 continue; 1566 1567 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1568 __soc_pcm_hw_free(be, be_substream); 1569 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1570 } 1571 } 1572 1573 __soc_pcm_close(be, be_substream); 1574 be_substream->runtime = NULL; 1575 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1576 } 1577 } 1578 1579 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1580 { 1581 struct snd_soc_pcm_runtime *be; 1582 struct snd_soc_dpcm *dpcm; 1583 int err, count = 0; 1584 1585 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1586 for_each_dpcm_be(fe, stream, dpcm) { 1587 struct snd_pcm_substream *be_substream; 1588 1589 be = dpcm->be; 1590 be_substream = snd_soc_dpcm_get_substream(be, stream); 1591 1592 if (!be_substream) { 1593 dev_err(be->dev, "ASoC: no backend %s stream\n", 1594 stream ? "capture" : "playback"); 1595 continue; 1596 } 1597 1598 /* is this op for this BE ? */ 1599 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1600 continue; 1601 1602 /* first time the dpcm is open ? */ 1603 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1604 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1605 stream ? "capture" : "playback", 1606 be->dpcm[stream].state); 1607 continue; 1608 } 1609 1610 if (be->dpcm[stream].users++ != 0) 1611 continue; 1612 1613 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1614 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1615 continue; 1616 1617 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1618 stream ? "capture" : "playback", be->dai_link->name); 1619 1620 be_substream->runtime = be->dpcm[stream].runtime; 1621 err = __soc_pcm_open(be, be_substream); 1622 if (err < 0) { 1623 be->dpcm[stream].users--; 1624 if (be->dpcm[stream].users < 0) 1625 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1626 stream ? "capture" : "playback", 1627 be->dpcm[stream].state); 1628 1629 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1630 goto unwind; 1631 } 1632 be->dpcm[stream].be_start = 0; 1633 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1634 count++; 1635 } 1636 1637 return count; 1638 1639 unwind: 1640 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1641 1642 return soc_pcm_ret(fe, err); 1643 } 1644 1645 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1646 { 1647 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1648 struct snd_pcm_runtime *runtime = substream->runtime; 1649 struct snd_pcm_hardware *hw = &runtime->hw; 1650 struct snd_soc_dai *dai; 1651 int stream = substream->stream; 1652 int i; 1653 1654 soc_pcm_hw_init(hw); 1655 1656 for_each_rtd_cpu_dais(fe, i, dai) { 1657 struct snd_soc_pcm_stream *cpu_stream; 1658 1659 /* 1660 * Skip CPUs which don't support the current stream 1661 * type. See soc_pcm_init_runtime_hw() for more details 1662 */ 1663 if (!snd_soc_dai_stream_valid(dai, stream)) 1664 continue; 1665 1666 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1667 1668 soc_pcm_hw_update_rate(hw, cpu_stream); 1669 soc_pcm_hw_update_chan(hw, cpu_stream); 1670 soc_pcm_hw_update_format(hw, cpu_stream); 1671 } 1672 1673 } 1674 1675 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1676 { 1677 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1678 struct snd_pcm_runtime *runtime = substream->runtime; 1679 struct snd_pcm_hardware *hw = &runtime->hw; 1680 struct snd_soc_dpcm *dpcm; 1681 struct snd_soc_dai *dai; 1682 int stream = substream->stream; 1683 1684 if (!fe->dai_link->dpcm_merged_format) 1685 return; 1686 1687 /* 1688 * It returns merged BE codec format 1689 * if FE want to use it (= dpcm_merged_format) 1690 */ 1691 1692 for_each_dpcm_be(fe, stream, dpcm) { 1693 struct snd_soc_pcm_runtime *be = dpcm->be; 1694 struct snd_soc_pcm_stream *codec_stream; 1695 int i; 1696 1697 for_each_rtd_codec_dais(be, i, dai) { 1698 /* 1699 * Skip CODECs which don't support the current stream 1700 * type. See soc_pcm_init_runtime_hw() for more details 1701 */ 1702 if (!snd_soc_dai_stream_valid(dai, stream)) 1703 continue; 1704 1705 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1706 1707 soc_pcm_hw_update_format(hw, codec_stream); 1708 } 1709 } 1710 } 1711 1712 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1713 { 1714 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1715 struct snd_pcm_runtime *runtime = substream->runtime; 1716 struct snd_pcm_hardware *hw = &runtime->hw; 1717 struct snd_soc_dpcm *dpcm; 1718 int stream = substream->stream; 1719 1720 if (!fe->dai_link->dpcm_merged_chan) 1721 return; 1722 1723 /* 1724 * It returns merged BE codec channel; 1725 * if FE want to use it (= dpcm_merged_chan) 1726 */ 1727 1728 for_each_dpcm_be(fe, stream, dpcm) { 1729 struct snd_soc_pcm_runtime *be = dpcm->be; 1730 struct snd_soc_pcm_stream *cpu_stream; 1731 struct snd_soc_dai *dai; 1732 int i; 1733 1734 for_each_rtd_cpu_dais(be, i, dai) { 1735 /* 1736 * Skip CPUs which don't support the current stream 1737 * type. See soc_pcm_init_runtime_hw() for more details 1738 */ 1739 if (!snd_soc_dai_stream_valid(dai, stream)) 1740 continue; 1741 1742 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1743 1744 soc_pcm_hw_update_chan(hw, cpu_stream); 1745 } 1746 1747 /* 1748 * chan min/max cannot be enforced if there are multiple CODEC 1749 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1750 */ 1751 if (be->dai_link->num_codecs == 1) { 1752 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1753 asoc_rtd_to_codec(be, 0), stream); 1754 1755 soc_pcm_hw_update_chan(hw, codec_stream); 1756 } 1757 } 1758 } 1759 1760 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1761 { 1762 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1763 struct snd_pcm_runtime *runtime = substream->runtime; 1764 struct snd_pcm_hardware *hw = &runtime->hw; 1765 struct snd_soc_dpcm *dpcm; 1766 int stream = substream->stream; 1767 1768 if (!fe->dai_link->dpcm_merged_rate) 1769 return; 1770 1771 /* 1772 * It returns merged BE codec channel; 1773 * if FE want to use it (= dpcm_merged_chan) 1774 */ 1775 1776 for_each_dpcm_be(fe, stream, dpcm) { 1777 struct snd_soc_pcm_runtime *be = dpcm->be; 1778 struct snd_soc_pcm_stream *pcm; 1779 struct snd_soc_dai *dai; 1780 int i; 1781 1782 for_each_rtd_dais(be, i, dai) { 1783 /* 1784 * Skip DAIs which don't support the current stream 1785 * type. See soc_pcm_init_runtime_hw() for more details 1786 */ 1787 if (!snd_soc_dai_stream_valid(dai, stream)) 1788 continue; 1789 1790 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1791 1792 soc_pcm_hw_update_rate(hw, pcm); 1793 } 1794 } 1795 } 1796 1797 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1798 int stream) 1799 { 1800 struct snd_soc_dpcm *dpcm; 1801 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1802 struct snd_soc_dai *fe_cpu_dai; 1803 int err = 0; 1804 int i; 1805 1806 /* apply symmetry for FE */ 1807 soc_pcm_update_symmetry(fe_substream); 1808 1809 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1810 /* Symmetry only applies if we've got an active stream. */ 1811 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1812 if (err < 0) 1813 goto error; 1814 } 1815 1816 /* apply symmetry for BE */ 1817 for_each_dpcm_be(fe, stream, dpcm) { 1818 struct snd_soc_pcm_runtime *be = dpcm->be; 1819 struct snd_pcm_substream *be_substream = 1820 snd_soc_dpcm_get_substream(be, stream); 1821 struct snd_soc_pcm_runtime *rtd; 1822 struct snd_soc_dai *dai; 1823 1824 /* A backend may not have the requested substream */ 1825 if (!be_substream) 1826 continue; 1827 1828 rtd = asoc_substream_to_rtd(be_substream); 1829 if (rtd->dai_link->be_hw_params_fixup) 1830 continue; 1831 1832 soc_pcm_update_symmetry(be_substream); 1833 1834 /* Symmetry only applies if we've got an active stream. */ 1835 for_each_rtd_dais(rtd, i, dai) { 1836 err = soc_pcm_apply_symmetry(fe_substream, dai); 1837 if (err < 0) 1838 goto error; 1839 } 1840 } 1841 error: 1842 return soc_pcm_ret(fe, err); 1843 } 1844 1845 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1846 { 1847 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1848 int stream = fe_substream->stream, ret = 0; 1849 1850 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1851 1852 ret = dpcm_be_dai_startup(fe, stream); 1853 if (ret < 0) 1854 goto be_err; 1855 1856 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1857 1858 /* start the DAI frontend */ 1859 ret = __soc_pcm_open(fe, fe_substream); 1860 if (ret < 0) 1861 goto unwind; 1862 1863 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1864 1865 dpcm_runtime_setup_fe(fe_substream); 1866 1867 dpcm_runtime_setup_be_format(fe_substream); 1868 dpcm_runtime_setup_be_chan(fe_substream); 1869 dpcm_runtime_setup_be_rate(fe_substream); 1870 1871 ret = dpcm_apply_symmetry(fe_substream, stream); 1872 1873 unwind: 1874 if (ret < 0) 1875 dpcm_be_dai_startup_unwind(fe, stream); 1876 be_err: 1877 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1878 1879 return soc_pcm_ret(fe, ret); 1880 } 1881 1882 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1883 { 1884 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1885 int stream = substream->stream; 1886 1887 snd_soc_dpcm_mutex_assert_held(fe); 1888 1889 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1890 1891 /* shutdown the BEs */ 1892 dpcm_be_dai_shutdown(fe, stream); 1893 1894 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1895 1896 /* now shutdown the frontend */ 1897 __soc_pcm_close(fe, substream); 1898 1899 /* run the stream stop event */ 1900 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1901 1902 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1903 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1904 return 0; 1905 } 1906 1907 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1908 { 1909 struct snd_soc_dpcm *dpcm; 1910 1911 /* only hw_params backends that are either sinks or sources 1912 * to this frontend DAI */ 1913 for_each_dpcm_be(fe, stream, dpcm) { 1914 1915 struct snd_soc_pcm_runtime *be = dpcm->be; 1916 struct snd_pcm_substream *be_substream = 1917 snd_soc_dpcm_get_substream(be, stream); 1918 1919 /* is this op for this BE ? */ 1920 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1921 continue; 1922 1923 /* only free hw when no longer used - check all FEs */ 1924 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1925 continue; 1926 1927 /* do not free hw if this BE is used by other FE */ 1928 if (be->dpcm[stream].users > 1) 1929 continue; 1930 1931 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1932 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1933 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1934 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1935 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1936 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1937 continue; 1938 1939 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1940 be->dai_link->name); 1941 1942 __soc_pcm_hw_free(be, be_substream); 1943 1944 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1945 } 1946 } 1947 1948 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1949 { 1950 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1951 int stream = substream->stream; 1952 1953 snd_soc_dpcm_mutex_lock(fe); 1954 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1955 1956 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1957 1958 /* call hw_free on the frontend */ 1959 soc_pcm_hw_clean(fe, substream, 0); 1960 1961 /* only hw_params backends that are either sinks or sources 1962 * to this frontend DAI */ 1963 dpcm_be_dai_hw_free(fe, stream); 1964 1965 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1966 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1967 1968 snd_soc_dpcm_mutex_unlock(fe); 1969 return 0; 1970 } 1971 1972 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1973 { 1974 struct snd_soc_pcm_runtime *be; 1975 struct snd_pcm_substream *be_substream; 1976 struct snd_soc_dpcm *dpcm; 1977 int ret; 1978 1979 for_each_dpcm_be(fe, stream, dpcm) { 1980 struct snd_pcm_hw_params hw_params; 1981 1982 be = dpcm->be; 1983 be_substream = snd_soc_dpcm_get_substream(be, stream); 1984 1985 /* is this op for this BE ? */ 1986 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1987 continue; 1988 1989 /* copy params for each dpcm */ 1990 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 1991 sizeof(struct snd_pcm_hw_params)); 1992 1993 /* perform any hw_params fixups */ 1994 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 1995 if (ret < 0) 1996 goto unwind; 1997 1998 /* copy the fixed-up hw params for BE dai */ 1999 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2000 sizeof(struct snd_pcm_hw_params)); 2001 2002 /* only allow hw_params() if no connected FEs are running */ 2003 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2004 continue; 2005 2006 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2007 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2008 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2009 continue; 2010 2011 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2012 be->dai_link->name); 2013 2014 ret = __soc_pcm_hw_params(be, be_substream, &hw_params); 2015 if (ret < 0) 2016 goto unwind; 2017 2018 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2019 } 2020 return 0; 2021 2022 unwind: 2023 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2024 __func__, be->dai_link->name, ret); 2025 2026 /* disable any enabled and non active backends */ 2027 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2028 be = dpcm->be; 2029 be_substream = snd_soc_dpcm_get_substream(be, stream); 2030 2031 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2032 continue; 2033 2034 /* only allow hw_free() if no connected FEs are running */ 2035 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2036 continue; 2037 2038 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2039 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2040 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2041 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2042 continue; 2043 2044 __soc_pcm_hw_free(be, be_substream); 2045 } 2046 2047 return ret; 2048 } 2049 2050 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2051 struct snd_pcm_hw_params *params) 2052 { 2053 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2054 int ret, stream = substream->stream; 2055 2056 snd_soc_dpcm_mutex_lock(fe); 2057 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2058 2059 memcpy(&fe->dpcm[stream].hw_params, params, 2060 sizeof(struct snd_pcm_hw_params)); 2061 ret = dpcm_be_dai_hw_params(fe, stream); 2062 if (ret < 0) 2063 goto out; 2064 2065 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2066 fe->dai_link->name, params_rate(params), 2067 params_channels(params), params_format(params)); 2068 2069 /* call hw_params on the frontend */ 2070 ret = __soc_pcm_hw_params(fe, substream, params); 2071 if (ret < 0) 2072 dpcm_be_dai_hw_free(fe, stream); 2073 else 2074 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2075 2076 out: 2077 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2078 snd_soc_dpcm_mutex_unlock(fe); 2079 2080 return soc_pcm_ret(fe, ret); 2081 } 2082 2083 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2084 int cmd) 2085 { 2086 struct snd_soc_pcm_runtime *be; 2087 bool pause_stop_transition; 2088 struct snd_soc_dpcm *dpcm; 2089 unsigned long flags; 2090 int ret = 0; 2091 2092 for_each_dpcm_be(fe, stream, dpcm) { 2093 struct snd_pcm_substream *be_substream; 2094 2095 be = dpcm->be; 2096 be_substream = snd_soc_dpcm_get_substream(be, stream); 2097 2098 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); 2099 2100 /* is this op for this BE ? */ 2101 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2102 goto next; 2103 2104 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2105 be->dai_link->name, cmd); 2106 2107 switch (cmd) { 2108 case SNDRV_PCM_TRIGGER_START: 2109 if (!be->dpcm[stream].be_start && 2110 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2111 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2112 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2113 goto next; 2114 2115 be->dpcm[stream].be_start++; 2116 if (be->dpcm[stream].be_start != 1) 2117 goto next; 2118 2119 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2120 ret = soc_pcm_trigger(be_substream, 2121 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2122 else 2123 ret = soc_pcm_trigger(be_substream, 2124 SNDRV_PCM_TRIGGER_START); 2125 if (ret) { 2126 be->dpcm[stream].be_start--; 2127 goto next; 2128 } 2129 2130 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2131 break; 2132 case SNDRV_PCM_TRIGGER_RESUME: 2133 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2134 goto next; 2135 2136 be->dpcm[stream].be_start++; 2137 if (be->dpcm[stream].be_start != 1) 2138 goto next; 2139 2140 ret = soc_pcm_trigger(be_substream, cmd); 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_PAUSE_RELEASE: 2149 if (!be->dpcm[stream].be_start && 2150 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2151 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2152 goto next; 2153 2154 fe->dpcm[stream].fe_pause = false; 2155 be->dpcm[stream].be_pause--; 2156 2157 be->dpcm[stream].be_start++; 2158 if (be->dpcm[stream].be_start != 1) 2159 goto next; 2160 2161 ret = soc_pcm_trigger(be_substream, cmd); 2162 if (ret) { 2163 be->dpcm[stream].be_start--; 2164 goto next; 2165 } 2166 2167 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2168 break; 2169 case SNDRV_PCM_TRIGGER_STOP: 2170 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2171 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2172 goto next; 2173 2174 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2175 be->dpcm[stream].be_start--; 2176 2177 if (be->dpcm[stream].be_start != 0) 2178 goto next; 2179 2180 pause_stop_transition = false; 2181 if (fe->dpcm[stream].fe_pause) { 2182 pause_stop_transition = true; 2183 fe->dpcm[stream].fe_pause = false; 2184 be->dpcm[stream].be_pause--; 2185 } 2186 2187 if (be->dpcm[stream].be_pause != 0) 2188 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2189 else 2190 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2191 2192 if (ret) { 2193 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2194 be->dpcm[stream].be_start++; 2195 if (pause_stop_transition) { 2196 fe->dpcm[stream].fe_pause = true; 2197 be->dpcm[stream].be_pause++; 2198 } 2199 goto next; 2200 } 2201 2202 if (be->dpcm[stream].be_pause != 0) 2203 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2204 else 2205 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2206 2207 break; 2208 case SNDRV_PCM_TRIGGER_SUSPEND: 2209 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2210 goto next; 2211 2212 be->dpcm[stream].be_start--; 2213 if (be->dpcm[stream].be_start != 0) 2214 goto next; 2215 2216 ret = soc_pcm_trigger(be_substream, cmd); 2217 if (ret) { 2218 be->dpcm[stream].be_start++; 2219 goto next; 2220 } 2221 2222 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2223 break; 2224 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2225 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2226 goto next; 2227 2228 fe->dpcm[stream].fe_pause = true; 2229 be->dpcm[stream].be_pause++; 2230 2231 be->dpcm[stream].be_start--; 2232 if (be->dpcm[stream].be_start != 0) 2233 goto next; 2234 2235 ret = soc_pcm_trigger(be_substream, cmd); 2236 if (ret) { 2237 be->dpcm[stream].be_start++; 2238 goto next; 2239 } 2240 2241 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2242 break; 2243 } 2244 next: 2245 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2246 if (ret) 2247 break; 2248 } 2249 return soc_pcm_ret(fe, ret); 2250 } 2251 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2252 2253 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2254 int cmd, bool fe_first) 2255 { 2256 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2257 int ret; 2258 2259 /* call trigger on the frontend before the backend. */ 2260 if (fe_first) { 2261 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2262 fe->dai_link->name, cmd); 2263 2264 ret = soc_pcm_trigger(substream, cmd); 2265 if (ret < 0) 2266 return ret; 2267 2268 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2269 return ret; 2270 } 2271 2272 /* call trigger on the frontend after the backend. */ 2273 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2274 if (ret < 0) 2275 return ret; 2276 2277 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2278 fe->dai_link->name, cmd); 2279 2280 ret = soc_pcm_trigger(substream, cmd); 2281 2282 return ret; 2283 } 2284 2285 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2286 { 2287 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2288 int stream = substream->stream; 2289 int ret = 0; 2290 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2291 2292 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2293 2294 switch (trigger) { 2295 case SND_SOC_DPCM_TRIGGER_PRE: 2296 switch (cmd) { 2297 case SNDRV_PCM_TRIGGER_START: 2298 case SNDRV_PCM_TRIGGER_RESUME: 2299 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2300 case SNDRV_PCM_TRIGGER_DRAIN: 2301 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2302 break; 2303 case SNDRV_PCM_TRIGGER_STOP: 2304 case SNDRV_PCM_TRIGGER_SUSPEND: 2305 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2306 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2307 break; 2308 default: 2309 ret = -EINVAL; 2310 break; 2311 } 2312 break; 2313 case SND_SOC_DPCM_TRIGGER_POST: 2314 switch (cmd) { 2315 case SNDRV_PCM_TRIGGER_START: 2316 case SNDRV_PCM_TRIGGER_RESUME: 2317 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2318 case SNDRV_PCM_TRIGGER_DRAIN: 2319 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2320 break; 2321 case SNDRV_PCM_TRIGGER_STOP: 2322 case SNDRV_PCM_TRIGGER_SUSPEND: 2323 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2324 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2325 break; 2326 default: 2327 ret = -EINVAL; 2328 break; 2329 } 2330 break; 2331 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2332 /* bespoke trigger() - handles both FE and BEs */ 2333 2334 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2335 fe->dai_link->name, cmd); 2336 2337 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2338 break; 2339 default: 2340 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2341 fe->dai_link->name); 2342 ret = -EINVAL; 2343 goto out; 2344 } 2345 2346 if (ret < 0) { 2347 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2348 cmd, ret); 2349 goto out; 2350 } 2351 2352 switch (cmd) { 2353 case SNDRV_PCM_TRIGGER_START: 2354 case SNDRV_PCM_TRIGGER_RESUME: 2355 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2356 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2357 break; 2358 case SNDRV_PCM_TRIGGER_STOP: 2359 case SNDRV_PCM_TRIGGER_SUSPEND: 2360 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2361 break; 2362 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2363 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2364 break; 2365 } 2366 2367 out: 2368 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2369 return ret; 2370 } 2371 2372 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2373 { 2374 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2375 int stream = substream->stream; 2376 2377 /* if FE's runtime_update is already set, we're in race; 2378 * process this trigger later at exit 2379 */ 2380 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2381 fe->dpcm[stream].trigger_pending = cmd + 1; 2382 return 0; /* delayed, assuming it's successful */ 2383 } 2384 2385 /* we're alone, let's trigger */ 2386 return dpcm_fe_dai_do_trigger(substream, cmd); 2387 } 2388 2389 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2390 { 2391 struct snd_soc_dpcm *dpcm; 2392 int ret = 0; 2393 2394 for_each_dpcm_be(fe, stream, dpcm) { 2395 2396 struct snd_soc_pcm_runtime *be = dpcm->be; 2397 struct snd_pcm_substream *be_substream = 2398 snd_soc_dpcm_get_substream(be, stream); 2399 2400 /* is this op for this BE ? */ 2401 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2402 continue; 2403 2404 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2405 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2406 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2407 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2408 continue; 2409 2410 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2411 be->dai_link->name); 2412 2413 ret = __soc_pcm_prepare(be, be_substream); 2414 if (ret < 0) 2415 break; 2416 2417 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2418 } 2419 2420 return soc_pcm_ret(fe, ret); 2421 } 2422 2423 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2424 { 2425 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2426 int stream = substream->stream, ret = 0; 2427 2428 snd_soc_dpcm_mutex_lock(fe); 2429 2430 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2431 2432 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2433 2434 /* there is no point preparing this FE if there are no BEs */ 2435 if (list_empty(&fe->dpcm[stream].be_clients)) { 2436 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2437 fe->dai_link->name); 2438 ret = -EINVAL; 2439 goto out; 2440 } 2441 2442 ret = dpcm_be_dai_prepare(fe, stream); 2443 if (ret < 0) 2444 goto out; 2445 2446 /* call prepare on the frontend */ 2447 ret = __soc_pcm_prepare(fe, substream); 2448 if (ret < 0) 2449 goto out; 2450 2451 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2452 2453 out: 2454 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2455 snd_soc_dpcm_mutex_unlock(fe); 2456 2457 return soc_pcm_ret(fe, ret); 2458 } 2459 2460 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2461 { 2462 struct snd_pcm_substream *substream = 2463 snd_soc_dpcm_get_substream(fe, stream); 2464 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2465 int err; 2466 2467 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2468 stream ? "capture" : "playback", fe->dai_link->name); 2469 2470 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2471 /* call bespoke trigger - FE takes care of all BE triggers */ 2472 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2473 fe->dai_link->name); 2474 2475 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2476 } else { 2477 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2478 fe->dai_link->name); 2479 2480 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2481 } 2482 2483 dpcm_be_dai_hw_free(fe, stream); 2484 2485 dpcm_be_dai_shutdown(fe, stream); 2486 2487 /* run the stream event for each BE */ 2488 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2489 2490 return soc_pcm_ret(fe, err); 2491 } 2492 2493 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2494 { 2495 struct snd_pcm_substream *substream = 2496 snd_soc_dpcm_get_substream(fe, stream); 2497 struct snd_soc_dpcm *dpcm; 2498 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2499 int ret = 0; 2500 2501 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2502 stream ? "capture" : "playback", fe->dai_link->name); 2503 2504 /* Only start the BE if the FE is ready */ 2505 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2506 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2507 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2508 fe->dai_link->name, fe->dpcm[stream].state); 2509 ret = -EINVAL; 2510 goto disconnect; 2511 } 2512 2513 /* startup must always be called for new BEs */ 2514 ret = dpcm_be_dai_startup(fe, stream); 2515 if (ret < 0) 2516 goto disconnect; 2517 2518 /* keep going if FE state is > open */ 2519 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2520 return 0; 2521 2522 ret = dpcm_be_dai_hw_params(fe, stream); 2523 if (ret < 0) 2524 goto close; 2525 2526 /* keep going if FE state is > hw_params */ 2527 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2528 return 0; 2529 2530 ret = dpcm_be_dai_prepare(fe, stream); 2531 if (ret < 0) 2532 goto hw_free; 2533 2534 /* run the stream event for each BE */ 2535 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2536 2537 /* keep going if FE state is > prepare */ 2538 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2539 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2540 return 0; 2541 2542 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2543 /* call trigger on the frontend - FE takes care of all BE triggers */ 2544 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2545 fe->dai_link->name); 2546 2547 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2548 if (ret < 0) 2549 goto hw_free; 2550 } else { 2551 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2552 fe->dai_link->name); 2553 2554 ret = dpcm_be_dai_trigger(fe, stream, 2555 SNDRV_PCM_TRIGGER_START); 2556 if (ret < 0) 2557 goto hw_free; 2558 } 2559 2560 return 0; 2561 2562 hw_free: 2563 dpcm_be_dai_hw_free(fe, stream); 2564 close: 2565 dpcm_be_dai_shutdown(fe, stream); 2566 disconnect: 2567 /* disconnect any pending BEs */ 2568 for_each_dpcm_be(fe, stream, dpcm) { 2569 struct snd_soc_pcm_runtime *be = dpcm->be; 2570 2571 /* is this op for this BE ? */ 2572 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2573 continue; 2574 2575 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2576 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2577 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2578 } 2579 2580 return soc_pcm_ret(fe, ret); 2581 } 2582 2583 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2584 { 2585 struct snd_soc_dapm_widget_list *list; 2586 int stream; 2587 int count, paths; 2588 2589 if (!fe->dai_link->dynamic) 2590 return 0; 2591 2592 if (fe->dai_link->num_cpus > 1) { 2593 dev_err(fe->dev, 2594 "%s doesn't support Multi CPU yet\n", __func__); 2595 return -EINVAL; 2596 } 2597 2598 /* only check active links */ 2599 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2600 return 0; 2601 2602 /* DAPM sync will call this to update DSP paths */ 2603 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2604 new ? "new" : "old", fe->dai_link->name); 2605 2606 for_each_pcm_streams(stream) { 2607 2608 /* skip if FE doesn't have playback/capture capability */ 2609 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2610 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2611 continue; 2612 2613 /* skip if FE isn't currently playing/capturing */ 2614 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2615 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2616 continue; 2617 2618 paths = dpcm_path_get(fe, stream, &list); 2619 if (paths < 0) 2620 return paths; 2621 2622 /* update any playback/capture paths */ 2623 count = dpcm_process_paths(fe, stream, &list, new); 2624 if (count) { 2625 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2626 if (new) 2627 dpcm_run_update_startup(fe, stream); 2628 else 2629 dpcm_run_update_shutdown(fe, stream); 2630 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2631 2632 dpcm_clear_pending_state(fe, stream); 2633 dpcm_be_disconnect(fe, stream); 2634 } 2635 2636 dpcm_path_put(&list); 2637 } 2638 2639 return 0; 2640 } 2641 2642 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2643 * any DAI links. 2644 */ 2645 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2646 { 2647 struct snd_soc_pcm_runtime *fe; 2648 int ret = 0; 2649 2650 mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass); 2651 /* shutdown all old paths first */ 2652 for_each_card_rtds(card, fe) { 2653 ret = soc_dpcm_fe_runtime_update(fe, 0); 2654 if (ret) 2655 goto out; 2656 } 2657 2658 /* bring new paths up */ 2659 for_each_card_rtds(card, fe) { 2660 ret = soc_dpcm_fe_runtime_update(fe, 1); 2661 if (ret) 2662 goto out; 2663 } 2664 2665 out: 2666 mutex_unlock(&card->pcm_mutex); 2667 return ret; 2668 } 2669 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2670 2671 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2672 { 2673 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2674 struct snd_soc_dpcm *dpcm; 2675 int stream = fe_substream->stream; 2676 2677 snd_soc_dpcm_mutex_assert_held(fe); 2678 2679 /* mark FE's links ready to prune */ 2680 for_each_dpcm_be(fe, stream, dpcm) 2681 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2682 2683 dpcm_be_disconnect(fe, stream); 2684 2685 fe->dpcm[stream].runtime = NULL; 2686 } 2687 2688 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2689 { 2690 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2691 int ret; 2692 2693 snd_soc_dpcm_mutex_lock(fe); 2694 ret = dpcm_fe_dai_shutdown(fe_substream); 2695 2696 dpcm_fe_dai_cleanup(fe_substream); 2697 2698 snd_soc_dpcm_mutex_unlock(fe); 2699 return ret; 2700 } 2701 2702 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2703 { 2704 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2705 struct snd_soc_dapm_widget_list *list; 2706 int ret; 2707 int stream = fe_substream->stream; 2708 2709 snd_soc_dpcm_mutex_lock(fe); 2710 fe->dpcm[stream].runtime = fe_substream->runtime; 2711 2712 ret = dpcm_path_get(fe, stream, &list); 2713 if (ret < 0) 2714 goto open_end; 2715 2716 /* calculate valid and active FE <-> BE dpcms */ 2717 dpcm_process_paths(fe, stream, &list, 1); 2718 2719 ret = dpcm_fe_dai_startup(fe_substream); 2720 if (ret < 0) 2721 dpcm_fe_dai_cleanup(fe_substream); 2722 2723 dpcm_clear_pending_state(fe, stream); 2724 dpcm_path_put(&list); 2725 open_end: 2726 snd_soc_dpcm_mutex_unlock(fe); 2727 return ret; 2728 } 2729 2730 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2731 int *playback, int *capture) 2732 { 2733 struct snd_soc_dai *cpu_dai; 2734 int i; 2735 2736 if (rtd->dai_link->dynamic && rtd->dai_link->num_cpus > 1) { 2737 dev_err(rtd->dev, 2738 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2739 return -EINVAL; 2740 } 2741 2742 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2743 int stream; 2744 2745 if (rtd->dai_link->dpcm_playback) { 2746 stream = SNDRV_PCM_STREAM_PLAYBACK; 2747 2748 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2749 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2750 *playback = 1; 2751 break; 2752 } 2753 } 2754 if (!*playback) { 2755 dev_err(rtd->card->dev, 2756 "No CPU DAIs support playback for stream %s\n", 2757 rtd->dai_link->stream_name); 2758 return -EINVAL; 2759 } 2760 } 2761 if (rtd->dai_link->dpcm_capture) { 2762 stream = SNDRV_PCM_STREAM_CAPTURE; 2763 2764 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2765 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2766 *capture = 1; 2767 break; 2768 } 2769 } 2770 2771 if (!*capture) { 2772 dev_err(rtd->card->dev, 2773 "No CPU DAIs support capture for stream %s\n", 2774 rtd->dai_link->stream_name); 2775 return -EINVAL; 2776 } 2777 } 2778 } else { 2779 struct snd_soc_dai *codec_dai; 2780 2781 /* Adapt stream for codec2codec links */ 2782 int cpu_capture = rtd->dai_link->params ? 2783 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2784 int cpu_playback = rtd->dai_link->params ? 2785 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2786 2787 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2788 if (rtd->dai_link->num_cpus == 1) { 2789 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2790 } else if (rtd->dai_link->num_cpus == rtd->dai_link->num_codecs) { 2791 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2792 } else { 2793 dev_err(rtd->card->dev, 2794 "N cpus to M codecs link is not supported yet\n"); 2795 return -EINVAL; 2796 } 2797 2798 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2799 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2800 *playback = 1; 2801 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2802 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2803 *capture = 1; 2804 } 2805 } 2806 2807 if (rtd->dai_link->playback_only) { 2808 *playback = 1; 2809 *capture = 0; 2810 } 2811 2812 if (rtd->dai_link->capture_only) { 2813 *playback = 0; 2814 *capture = 1; 2815 } 2816 2817 return 0; 2818 } 2819 2820 static int soc_create_pcm(struct snd_pcm **pcm, 2821 struct snd_soc_pcm_runtime *rtd, 2822 int playback, int capture, int num) 2823 { 2824 char new_name[64]; 2825 int ret; 2826 2827 /* create the PCM */ 2828 if (rtd->dai_link->params) { 2829 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2830 rtd->dai_link->stream_name); 2831 2832 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2833 playback, capture, pcm); 2834 } else if (rtd->dai_link->no_pcm) { 2835 snprintf(new_name, sizeof(new_name), "(%s)", 2836 rtd->dai_link->stream_name); 2837 2838 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2839 playback, capture, pcm); 2840 } else { 2841 if (rtd->dai_link->dynamic) 2842 snprintf(new_name, sizeof(new_name), "%s (*)", 2843 rtd->dai_link->stream_name); 2844 else 2845 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2846 rtd->dai_link->stream_name, 2847 soc_codec_dai_name(rtd), num); 2848 2849 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2850 capture, pcm); 2851 } 2852 if (ret < 0) { 2853 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2854 new_name, rtd->dai_link->name, ret); 2855 return ret; 2856 } 2857 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2858 2859 return 0; 2860 } 2861 2862 /* create a new pcm */ 2863 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2864 { 2865 struct snd_soc_component *component; 2866 struct snd_pcm *pcm; 2867 int ret = 0, playback = 0, capture = 0; 2868 int i; 2869 2870 ret = soc_get_playback_capture(rtd, &playback, &capture); 2871 if (ret < 0) 2872 return ret; 2873 2874 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2875 if (ret < 0) 2876 return ret; 2877 2878 /* DAPM dai link stream work */ 2879 /* 2880 * Currently nothing to do for c2c links 2881 * Since c2c links are internal nodes in the DAPM graph and 2882 * don't interface with the outside world or application layer 2883 * we don't have to do any special handling on close. 2884 */ 2885 if (!rtd->dai_link->params) 2886 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2887 2888 rtd->pcm = pcm; 2889 pcm->nonatomic = rtd->dai_link->nonatomic; 2890 pcm->private_data = rtd; 2891 pcm->no_device_suspend = true; 2892 2893 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2894 if (playback) 2895 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2896 if (capture) 2897 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2898 goto out; 2899 } 2900 2901 /* ASoC PCM operations */ 2902 if (rtd->dai_link->dynamic) { 2903 rtd->ops.open = dpcm_fe_dai_open; 2904 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2905 rtd->ops.prepare = dpcm_fe_dai_prepare; 2906 rtd->ops.trigger = dpcm_fe_dai_trigger; 2907 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2908 rtd->ops.close = dpcm_fe_dai_close; 2909 rtd->ops.pointer = soc_pcm_pointer; 2910 } else { 2911 rtd->ops.open = soc_pcm_open; 2912 rtd->ops.hw_params = soc_pcm_hw_params; 2913 rtd->ops.prepare = soc_pcm_prepare; 2914 rtd->ops.trigger = soc_pcm_trigger; 2915 rtd->ops.hw_free = soc_pcm_hw_free; 2916 rtd->ops.close = soc_pcm_close; 2917 rtd->ops.pointer = soc_pcm_pointer; 2918 } 2919 2920 for_each_rtd_components(rtd, i, component) { 2921 const struct snd_soc_component_driver *drv = component->driver; 2922 2923 if (drv->ioctl) 2924 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2925 if (drv->sync_stop) 2926 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2927 if (drv->copy_user) 2928 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2929 if (drv->page) 2930 rtd->ops.page = snd_soc_pcm_component_page; 2931 if (drv->mmap) 2932 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2933 if (drv->ack) 2934 rtd->ops.ack = snd_soc_pcm_component_ack; 2935 } 2936 2937 if (playback) 2938 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2939 2940 if (capture) 2941 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2942 2943 ret = snd_soc_pcm_component_new(rtd); 2944 if (ret < 0) 2945 return ret; 2946 out: 2947 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2948 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2949 return ret; 2950 } 2951 2952 /* is the current PCM operation for this FE ? */ 2953 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2954 { 2955 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2956 return 1; 2957 return 0; 2958 } 2959 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2960 2961 /* is the current PCM operation for this BE ? */ 2962 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2963 struct snd_soc_pcm_runtime *be, int stream) 2964 { 2965 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2966 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2967 be->dpcm[stream].runtime_update)) 2968 return 1; 2969 return 0; 2970 } 2971 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2972 2973 /* get the substream for this BE */ 2974 struct snd_pcm_substream * 2975 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2976 { 2977 return be->pcm->streams[stream].substream; 2978 } 2979 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2980 2981 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 2982 struct snd_soc_pcm_runtime *be, 2983 int stream, 2984 const enum snd_soc_dpcm_state *states, 2985 int num_states) 2986 { 2987 struct snd_soc_dpcm *dpcm; 2988 int state; 2989 int ret = 1; 2990 int i; 2991 2992 for_each_dpcm_fe(be, stream, dpcm) { 2993 2994 if (dpcm->fe == fe) 2995 continue; 2996 2997 state = dpcm->fe->dpcm[stream].state; 2998 for (i = 0; i < num_states; i++) { 2999 if (state == states[i]) { 3000 ret = 0; 3001 break; 3002 } 3003 } 3004 } 3005 3006 /* it's safe to do this BE DAI */ 3007 return ret; 3008 } 3009 3010 /* 3011 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3012 * are not running, paused or suspended for the specified stream direction. 3013 */ 3014 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3015 struct snd_soc_pcm_runtime *be, int stream) 3016 { 3017 const enum snd_soc_dpcm_state state[] = { 3018 SND_SOC_DPCM_STATE_START, 3019 SND_SOC_DPCM_STATE_PAUSED, 3020 SND_SOC_DPCM_STATE_SUSPEND, 3021 }; 3022 3023 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3024 } 3025 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3026 3027 /* 3028 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3029 * running, paused or suspended for the specified stream direction. 3030 */ 3031 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3032 struct snd_soc_pcm_runtime *be, int stream) 3033 { 3034 const enum snd_soc_dpcm_state state[] = { 3035 SND_SOC_DPCM_STATE_START, 3036 SND_SOC_DPCM_STATE_PAUSED, 3037 SND_SOC_DPCM_STATE_SUSPEND, 3038 SND_SOC_DPCM_STATE_PREPARE, 3039 }; 3040 3041 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3042 } 3043 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3044