1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // soc-pcm.c -- ALSA SoC PCM 4 // 5 // Copyright 2005 Wolfson Microelectronics PLC. 6 // Copyright 2005 Openedhand Ltd. 7 // Copyright (C) 2010 Slimlogic Ltd. 8 // Copyright (C) 2010 Texas Instruments Inc. 9 // 10 // Authors: Liam Girdwood <lrg@ti.com> 11 // Mark Brown <broonie@opensource.wolfsonmicro.com> 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/pinctrl/consumer.h> 17 #include <linux/slab.h> 18 #include <linux/workqueue.h> 19 #include <linux/export.h> 20 #include <linux/debugfs.h> 21 #include <sound/core.h> 22 #include <sound/pcm.h> 23 #include <sound/pcm_params.h> 24 #include <sound/soc.h> 25 #include <sound/soc-dpcm.h> 26 #include <sound/soc-link.h> 27 #include <sound/initval.h> 28 29 #define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret) 30 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd, 31 const char *func, int ret) 32 { 33 return snd_soc_ret(rtd->dev, ret, 34 "at %s() on %s\n", func, rtd->dai_link->name); 35 } 36 37 /* is the current PCM operation for this FE ? */ 38 #if 0 39 static int snd_soc_dpcm_can_fe_update(struct snd_soc_pcm_runtime *fe, int stream) 40 { 41 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 42 return 1; 43 return 0; 44 } 45 #endif 46 47 /* is the current PCM operation for this BE ? */ 48 static int snd_soc_dpcm_can_be_update(struct snd_soc_pcm_runtime *fe, 49 struct snd_soc_pcm_runtime *be, int stream) 50 { 51 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 52 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 53 be->dpcm[stream].runtime_update)) 54 return 1; 55 return 0; 56 } 57 58 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 59 struct snd_soc_pcm_runtime *be, 60 int stream, 61 const enum snd_soc_dpcm_state *states, 62 int num_states) 63 { 64 struct snd_soc_dpcm *dpcm; 65 int state; 66 int ret = 1; 67 int i; 68 69 for_each_dpcm_fe(be, stream, dpcm) { 70 71 if (dpcm->fe == fe) 72 continue; 73 74 state = dpcm->fe->dpcm[stream].state; 75 for (i = 0; i < num_states; i++) { 76 if (state == states[i]) { 77 ret = 0; 78 break; 79 } 80 } 81 } 82 83 /* it's safe to do this BE DAI */ 84 return ret; 85 } 86 87 /* 88 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 89 * are not running, paused or suspended for the specified stream direction. 90 */ 91 static int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 92 struct snd_soc_pcm_runtime *be, int stream) 93 { 94 const enum snd_soc_dpcm_state state[] = { 95 SND_SOC_DPCM_STATE_START, 96 SND_SOC_DPCM_STATE_PAUSED, 97 SND_SOC_DPCM_STATE_SUSPEND, 98 }; 99 100 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 101 } 102 103 /* 104 * We can only change hw params a BE DAI if any of it's FE are not prepared, 105 * running, paused or suspended for the specified stream direction. 106 */ 107 static int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 108 struct snd_soc_pcm_runtime *be, int stream) 109 { 110 const enum snd_soc_dpcm_state state[] = { 111 SND_SOC_DPCM_STATE_START, 112 SND_SOC_DPCM_STATE_PAUSED, 113 SND_SOC_DPCM_STATE_SUSPEND, 114 SND_SOC_DPCM_STATE_PREPARE, 115 }; 116 117 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 118 } 119 120 /* 121 * We can only prepare a BE DAI if any of it's FE are not prepared, 122 * running or paused for the specified stream direction. 123 */ 124 static int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe, 125 struct snd_soc_pcm_runtime *be, int stream) 126 { 127 const enum snd_soc_dpcm_state state[] = { 128 SND_SOC_DPCM_STATE_START, 129 SND_SOC_DPCM_STATE_PAUSED, 130 SND_SOC_DPCM_STATE_PREPARE, 131 }; 132 133 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 134 } 135 136 #define DPCM_MAX_BE_USERS 8 137 138 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 139 { 140 return (rtd)->dai_link->num_cpus == 1 ? snd_soc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 141 } 142 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 143 { 144 return (rtd)->dai_link->num_codecs == 1 ? snd_soc_rtd_to_codec(rtd, 0)->name : "multicodec"; 145 } 146 147 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 148 { 149 switch (state) { 150 case SND_SOC_DPCM_STATE_NEW: 151 return "new"; 152 case SND_SOC_DPCM_STATE_OPEN: 153 return "open"; 154 case SND_SOC_DPCM_STATE_HW_PARAMS: 155 return "hw_params"; 156 case SND_SOC_DPCM_STATE_PREPARE: 157 return "prepare"; 158 case SND_SOC_DPCM_STATE_START: 159 return "start"; 160 case SND_SOC_DPCM_STATE_STOP: 161 return "stop"; 162 case SND_SOC_DPCM_STATE_SUSPEND: 163 return "suspend"; 164 case SND_SOC_DPCM_STATE_PAUSED: 165 return "paused"; 166 case SND_SOC_DPCM_STATE_HW_FREE: 167 return "hw_free"; 168 case SND_SOC_DPCM_STATE_CLOSE: 169 return "close"; 170 } 171 172 return "unknown"; 173 } 174 175 #ifdef CONFIG_DEBUG_FS 176 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 177 int stream, char *buf, size_t size) 178 { 179 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 180 struct snd_soc_dpcm *dpcm; 181 ssize_t offset = 0; 182 183 /* FE state */ 184 offset += scnprintf(buf + offset, size - offset, 185 "[%s - %s]\n", fe->dai_link->name, 186 stream ? "Capture" : "Playback"); 187 188 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 189 dpcm_state_string(fe->dpcm[stream].state)); 190 191 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 192 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 193 offset += scnprintf(buf + offset, size - offset, 194 "Hardware Params: " 195 "Format = %s, Channels = %d, Rate = %d\n", 196 snd_pcm_format_name(params_format(params)), 197 params_channels(params), 198 params_rate(params)); 199 200 /* BEs state */ 201 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 202 203 if (list_empty(&fe->dpcm[stream].be_clients)) { 204 offset += scnprintf(buf + offset, size - offset, 205 " No active DSP links\n"); 206 goto out; 207 } 208 209 for_each_dpcm_be(fe, stream, dpcm) { 210 struct snd_soc_pcm_runtime *be = dpcm->be; 211 params = &be->dpcm[stream].hw_params; 212 213 offset += scnprintf(buf + offset, size - offset, 214 "- %s\n", be->dai_link->name); 215 216 offset += scnprintf(buf + offset, size - offset, 217 " State: %s\n", 218 dpcm_state_string(be->dpcm[stream].state)); 219 220 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 221 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 222 offset += scnprintf(buf + offset, size - offset, 223 " Hardware Params: " 224 "Format = %s, Channels = %d, Rate = %d\n", 225 snd_pcm_format_name(params_format(params)), 226 params_channels(params), 227 params_rate(params)); 228 } 229 out: 230 return offset; 231 } 232 233 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 234 size_t count, loff_t *ppos) 235 { 236 struct snd_soc_pcm_runtime *fe = file->private_data; 237 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 238 int stream; 239 char *buf; 240 241 if (fe->dai_link->num_cpus > 1) 242 return snd_soc_ret(fe->dev, -EINVAL, 243 "%s doesn't support Multi CPU yet\n", __func__); 244 245 buf = kmalloc(out_count, GFP_KERNEL); 246 if (!buf) 247 return -ENOMEM; 248 249 snd_soc_dpcm_mutex_lock(fe); 250 for_each_pcm_streams(stream) 251 if (snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream)) 252 offset += dpcm_show_state(fe, stream, 253 buf + offset, 254 out_count - offset); 255 snd_soc_dpcm_mutex_unlock(fe); 256 257 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 258 259 kfree(buf); 260 return ret; 261 } 262 263 static const struct file_operations dpcm_state_fops = { 264 .open = simple_open, 265 .read = dpcm_state_read_file, 266 .llseek = default_llseek, 267 }; 268 269 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 270 { 271 if (!rtd->dai_link->dynamic) 272 return; 273 274 if (!rtd->card->debugfs_card_root) 275 return; 276 277 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 278 rtd->card->debugfs_card_root); 279 280 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 281 rtd, &dpcm_state_fops); 282 } 283 284 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 285 { 286 char *name; 287 288 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 289 snd_pcm_direction_name(stream)); 290 if (name) { 291 dpcm->debugfs_state = debugfs_create_dir( 292 name, dpcm->fe->debugfs_dpcm_root); 293 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 294 &dpcm->state); 295 kfree(name); 296 } 297 } 298 299 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 300 { 301 debugfs_remove_recursive(dpcm->debugfs_state); 302 } 303 304 #else 305 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 306 int stream) 307 { 308 } 309 310 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 311 { 312 } 313 #endif 314 315 /* Set FE's runtime_update state; the state is protected via PCM stream lock 316 * for avoiding the race with trigger callback. 317 * If the state is unset and a trigger is pending while the previous operation, 318 * process the pending trigger action here. 319 */ 320 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 321 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 322 int stream, enum snd_soc_dpcm_update state) 323 { 324 struct snd_pcm_substream *substream = 325 snd_soc_dpcm_get_substream(fe, stream); 326 327 snd_pcm_stream_lock_irq(substream); 328 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 329 dpcm_fe_dai_do_trigger(substream, 330 fe->dpcm[stream].trigger_pending - 1); 331 fe->dpcm[stream].trigger_pending = 0; 332 } 333 fe->dpcm[stream].runtime_update = state; 334 snd_pcm_stream_unlock_irq(substream); 335 } 336 337 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 338 int stream, enum snd_soc_dpcm_update state) 339 { 340 be->dpcm[stream].runtime_update = state; 341 } 342 343 /** 344 * snd_soc_runtime_action() - Increment/Decrement active count for 345 * PCM runtime components 346 * @rtd: ASoC PCM runtime that is activated 347 * @stream: Direction of the PCM stream 348 * @action: Activate stream if 1. Deactivate if -1. 349 * 350 * Increments/Decrements the active count for all the DAIs and components 351 * attached to a PCM runtime. 352 * Should typically be called when a stream is opened. 353 * 354 * Must be called with the rtd->card->pcm_mutex being held 355 */ 356 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 357 int stream, int action) 358 { 359 struct snd_soc_component *component; 360 struct snd_soc_dai *dai; 361 int i; 362 363 snd_soc_dpcm_mutex_assert_held(rtd); 364 365 for_each_rtd_dais(rtd, i, dai) 366 snd_soc_dai_action(dai, stream, action); 367 368 /* Increments/Decrements the active count for components without DAIs */ 369 for_each_rtd_components(rtd, i, component) { 370 if (component->num_dai) 371 continue; 372 component->active += action; 373 } 374 } 375 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 376 377 /** 378 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 379 * @rtd: The ASoC PCM runtime that should be checked. 380 * 381 * This function checks whether the power down delay should be ignored for a 382 * specific PCM runtime. Returns true if the delay is 0, if the DAI link has 383 * been configured to ignore the delay, or if none of the components benefits 384 * from having the delay. 385 */ 386 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 387 { 388 struct snd_soc_component *component; 389 int i; 390 391 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 392 return true; 393 394 for_each_rtd_components(rtd, i, component) 395 if (component->driver->use_pmdown_time) 396 /* No need to go through all components */ 397 return false; 398 399 return true; 400 } 401 402 /* DPCM stream event, send event to FE and all active BEs. */ 403 void dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, int event) 404 { 405 struct snd_soc_dpcm *dpcm; 406 407 snd_soc_dpcm_mutex_assert_held(fe); 408 409 for_each_dpcm_be(fe, dir, dpcm) { 410 411 struct snd_soc_pcm_runtime *be = dpcm->be; 412 413 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 414 be->dai_link->name, event, dir); 415 416 if ((event == SND_SOC_DAPM_STREAM_STOP) && 417 (be->dpcm[dir].users >= 1)) 418 continue; 419 420 snd_soc_dapm_stream_event(be, dir, event); 421 } 422 423 snd_soc_dapm_stream_event(fe, dir, event); 424 } 425 426 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 427 struct snd_pcm_hw_params *params) 428 { 429 if (params) { 430 dai->symmetric_rate = params_rate(params); 431 dai->symmetric_channels = params_channels(params); 432 dai->symmetric_sample_bits = snd_pcm_format_physical_width(params_format(params)); 433 } else { 434 dai->symmetric_rate = 0; 435 dai->symmetric_channels = 0; 436 dai->symmetric_sample_bits = 0; 437 } 438 } 439 440 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 441 struct snd_soc_dai *soc_dai) 442 { 443 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 444 int ret; 445 446 if (!snd_soc_dai_active(soc_dai)) 447 return 0; 448 449 #define __soc_pcm_apply_symmetry(name, NAME) \ 450 if (soc_dai->symmetric_##name && \ 451 (soc_dai->driver->symmetric_##name || rtd->dai_link->symmetric_##name)) { \ 452 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 453 #name, soc_dai->symmetric_##name); \ 454 \ 455 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 456 SNDRV_PCM_HW_PARAM_##NAME,\ 457 soc_dai->symmetric_##name); \ 458 if (ret < 0) \ 459 return snd_soc_ret(soc_dai->dev, ret, \ 460 "Unable to apply %s constraint\n", #name); \ 461 } 462 463 __soc_pcm_apply_symmetry(rate, RATE); 464 __soc_pcm_apply_symmetry(channels, CHANNELS); 465 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 466 467 return 0; 468 } 469 470 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 471 struct snd_pcm_hw_params *params) 472 { 473 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 474 struct snd_soc_dai d; 475 struct snd_soc_dai *dai; 476 struct snd_soc_dai *cpu_dai; 477 unsigned int symmetry, i; 478 479 d.name = __func__; 480 soc_pcm_set_dai_params(&d, params); 481 482 #define __soc_pcm_params_symmetry(xxx) \ 483 symmetry = rtd->dai_link->symmetric_##xxx; \ 484 for_each_rtd_dais(rtd, i, dai) \ 485 symmetry |= dai->driver->symmetric_##xxx; \ 486 \ 487 if (symmetry) \ 488 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 489 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 490 cpu_dai->symmetric_##xxx && \ 491 cpu_dai->symmetric_##xxx != d.symmetric_##xxx) \ 492 return snd_soc_ret(rtd->dev, -EINVAL, \ 493 "unmatched %s symmetry: %s:%d - %s:%d\n", \ 494 #xxx, cpu_dai->name, cpu_dai->symmetric_##xxx, \ 495 d.name, d.symmetric_##xxx); 496 497 /* reject unmatched parameters when applying symmetry */ 498 __soc_pcm_params_symmetry(rate); 499 __soc_pcm_params_symmetry(channels); 500 __soc_pcm_params_symmetry(sample_bits); 501 502 return 0; 503 } 504 505 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 506 { 507 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 508 struct snd_soc_dai_link *link = rtd->dai_link; 509 struct snd_soc_dai *dai; 510 unsigned int symmetry, i; 511 512 symmetry = link->symmetric_rate || 513 link->symmetric_channels || 514 link->symmetric_sample_bits; 515 516 for_each_rtd_dais(rtd, i, dai) 517 symmetry = symmetry || 518 dai->driver->symmetric_rate || 519 dai->driver->symmetric_channels || 520 dai->driver->symmetric_sample_bits; 521 522 if (symmetry) 523 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 524 } 525 526 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 527 { 528 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 529 int ret; 530 531 if (!bits) 532 return; 533 534 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 535 if (ret != 0) 536 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 537 bits, ret); 538 } 539 540 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 541 { 542 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 543 struct snd_soc_dai *cpu_dai; 544 struct snd_soc_dai *codec_dai; 545 int stream = substream->stream; 546 int i; 547 unsigned int bits = 0, cpu_bits = 0; 548 549 for_each_rtd_codec_dais(rtd, i, codec_dai) { 550 const struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 551 552 if (pcm_codec->sig_bits == 0) { 553 bits = 0; 554 break; 555 } 556 bits = max(pcm_codec->sig_bits, bits); 557 } 558 559 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 560 const struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 561 562 if (pcm_cpu->sig_bits == 0) { 563 cpu_bits = 0; 564 break; 565 } 566 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 567 } 568 569 soc_pcm_set_msb(substream, bits); 570 soc_pcm_set_msb(substream, cpu_bits); 571 } 572 573 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw, bool force) 574 { 575 if (force) { 576 hw->rates = UINT_MAX; 577 hw->rate_min = 0; 578 hw->rate_max = UINT_MAX; 579 hw->channels_min = 0; 580 hw->channels_max = UINT_MAX; 581 hw->formats = ULLONG_MAX; 582 } else { 583 /* Preserve initialized parameters */ 584 if (!hw->rates) 585 hw->rates = UINT_MAX; 586 if (!hw->rate_max) 587 hw->rate_max = UINT_MAX; 588 if (!hw->channels_max) 589 hw->channels_max = UINT_MAX; 590 if (!hw->formats) 591 hw->formats = ULLONG_MAX; 592 } 593 } 594 595 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 596 const struct snd_soc_pcm_stream *p) 597 { 598 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 599 600 /* setup hw->rate_min/max via hw->rates first */ 601 snd_pcm_hw_limit_rates(hw); 602 603 /* update hw->rate_min/max by snd_soc_pcm_stream */ 604 hw->rate_min = max(hw->rate_min, p->rate_min); 605 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 606 } 607 608 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 609 const struct snd_soc_pcm_stream *p) 610 { 611 hw->channels_min = max(hw->channels_min, p->channels_min); 612 hw->channels_max = min(hw->channels_max, p->channels_max); 613 } 614 615 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 616 const struct snd_soc_pcm_stream *p) 617 { 618 hw->formats &= p->formats; 619 hw->subformats &= p->subformats; 620 } 621 622 /** 623 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 624 * @rtd: ASoC PCM runtime 625 * @hw: PCM hardware parameters (output) 626 * @stream: Direction of the PCM stream 627 * 628 * Calculates the subset of stream parameters supported by all DAIs 629 * associated with the PCM stream. 630 */ 631 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 632 struct snd_pcm_hardware *hw, int stream) 633 { 634 struct snd_soc_dai *codec_dai; 635 struct snd_soc_dai *cpu_dai; 636 const struct snd_soc_pcm_stream *codec_stream; 637 const struct snd_soc_pcm_stream *cpu_stream; 638 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 639 int i; 640 641 soc_pcm_hw_init(hw, true); 642 643 /* first calculate min/max only for CPUs in the DAI link */ 644 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 645 646 /* 647 * Skip CPUs which don't support the current stream type. 648 * Otherwise, since the rate, channel, and format values will 649 * zero in that case, we would have no usable settings left, 650 * causing the resulting setup to fail. 651 */ 652 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 653 continue; 654 655 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 656 657 soc_pcm_hw_update_chan(hw, cpu_stream); 658 soc_pcm_hw_update_rate(hw, cpu_stream); 659 soc_pcm_hw_update_format(hw, cpu_stream); 660 } 661 cpu_chan_min = hw->channels_min; 662 cpu_chan_max = hw->channels_max; 663 664 /* second calculate min/max only for CODECs in the DAI link */ 665 for_each_rtd_codec_dais(rtd, i, codec_dai) { 666 667 /* 668 * Skip CODECs which don't support the current stream type. 669 * Otherwise, since the rate, channel, and format values will 670 * zero in that case, we would have no usable settings left, 671 * causing the resulting setup to fail. 672 */ 673 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 674 continue; 675 676 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 677 678 soc_pcm_hw_update_chan(hw, codec_stream); 679 soc_pcm_hw_update_rate(hw, codec_stream); 680 soc_pcm_hw_update_format(hw, codec_stream); 681 } 682 683 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 684 if (!hw->channels_min) 685 return -EINVAL; 686 687 /* 688 * chan min/max cannot be enforced if there are multiple CODEC DAIs 689 * connected to CPU DAI(s), use CPU DAI's directly and let 690 * channel allocation be fixed up later 691 */ 692 if (rtd->dai_link->num_codecs > 1) { 693 hw->channels_min = cpu_chan_min; 694 hw->channels_max = cpu_chan_max; 695 } 696 697 return 0; 698 } 699 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 700 701 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 702 { 703 struct snd_pcm_hardware *hw = &substream->runtime->hw; 704 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 705 u64 formats = hw->formats; 706 707 /* 708 * At least one CPU and one CODEC should match. Otherwise, we should 709 * have bailed out on a higher level, since there would be no CPU or 710 * CODEC to support the transfer direction in that case. 711 */ 712 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 713 714 if (formats) 715 hw->formats &= formats; 716 } 717 718 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 719 { 720 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 721 struct snd_soc_component *component; 722 int i, ret = 0; 723 724 for_each_rtd_components(rtd, i, component) { 725 ret = snd_soc_component_module_get_when_open(component, substream); 726 if (ret < 0) 727 break; 728 729 ret = snd_soc_component_open(component, substream); 730 if (ret < 0) 731 break; 732 } 733 734 return ret; 735 } 736 737 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 738 int rollback) 739 { 740 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 741 struct snd_soc_component *component; 742 int i, ret = 0; 743 744 for_each_rtd_components(rtd, i, component) { 745 int r = snd_soc_component_close(component, substream, rollback); 746 if (r < 0) 747 ret = r; /* use last ret */ 748 749 snd_soc_component_module_put_when_close(component, substream, rollback); 750 } 751 752 return ret; 753 } 754 755 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 756 struct snd_pcm_substream *substream, int rollback) 757 { 758 struct snd_soc_component *component; 759 struct snd_soc_dai *dai; 760 int i; 761 762 snd_soc_dpcm_mutex_assert_held(rtd); 763 764 if (!rollback) { 765 snd_soc_runtime_deactivate(rtd, substream->stream); 766 767 /* Make sure DAI parameters cleared if the DAI becomes inactive */ 768 for_each_rtd_dais(rtd, i, dai) { 769 if (snd_soc_dai_active(dai) == 0) 770 soc_pcm_set_dai_params(dai, NULL); 771 } 772 } 773 774 for_each_rtd_dais_reverse(rtd, i, dai) 775 snd_soc_dai_shutdown(dai, substream, rollback); 776 777 snd_soc_link_shutdown(substream, rollback); 778 779 soc_pcm_components_close(substream, rollback); 780 781 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 782 783 for_each_rtd_components(rtd, i, component) 784 if (!snd_soc_component_active(component)) 785 pinctrl_pm_select_sleep_state(component->dev); 786 787 return 0; 788 } 789 790 /* 791 * Called by ALSA when a PCM substream is closed. Private data can be 792 * freed here. The cpu DAI, codec DAI, machine and components are also 793 * shutdown. 794 */ 795 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 796 struct snd_pcm_substream *substream) 797 { 798 return soc_pcm_clean(rtd, substream, 0); 799 } 800 801 /* PCM close ops for non-DPCM streams */ 802 static int soc_pcm_close(struct snd_pcm_substream *substream) 803 { 804 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 805 806 snd_soc_dpcm_mutex_lock(rtd); 807 __soc_pcm_close(rtd, substream); 808 snd_soc_dpcm_mutex_unlock(rtd); 809 return 0; 810 } 811 812 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 813 { 814 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 815 struct snd_pcm_hardware *hw = &substream->runtime->hw; 816 const char *name_cpu = soc_cpu_dai_name(rtd); 817 const char *name_codec = soc_codec_dai_name(rtd); 818 const char *err_msg; 819 struct device *dev = rtd->dev; 820 821 err_msg = "rates"; 822 if (!hw->rates) 823 goto config_err; 824 825 err_msg = "formats"; 826 if (!hw->formats) 827 goto config_err; 828 829 err_msg = "channels"; 830 if (!hw->channels_min || !hw->channels_max || 831 hw->channels_min > hw->channels_max) 832 goto config_err; 833 834 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 835 name_cpu); 836 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 837 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 838 hw->channels_max); 839 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 840 hw->rate_max); 841 842 return 0; 843 844 config_err: 845 return snd_soc_ret(dev, -EINVAL, 846 "%s <-> %s No matching %s\n", name_codec, name_cpu, err_msg); 847 } 848 849 /* 850 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 851 * then initialized and any private data can be allocated. This also calls 852 * startup for the cpu DAI, component, machine and codec DAI. 853 */ 854 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 855 struct snd_pcm_substream *substream) 856 { 857 struct snd_soc_component *component; 858 struct snd_soc_dai *dai; 859 int i, ret = 0; 860 861 snd_soc_dpcm_mutex_assert_held(rtd); 862 863 for_each_rtd_components(rtd, i, component) 864 pinctrl_pm_select_default_state(component->dev); 865 866 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 867 if (ret < 0) 868 goto err; 869 870 ret = soc_pcm_components_open(substream); 871 if (ret < 0) 872 goto err; 873 874 ret = snd_soc_link_startup(substream); 875 if (ret < 0) 876 goto err; 877 878 /* startup the audio subsystem */ 879 for_each_rtd_dais(rtd, i, dai) { 880 ret = snd_soc_dai_startup(dai, substream); 881 if (ret < 0) 882 goto err; 883 } 884 885 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 886 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 887 goto dynamic; 888 889 /* Check that the codec and cpu DAIs are compatible */ 890 soc_pcm_init_runtime_hw(substream); 891 892 soc_pcm_update_symmetry(substream); 893 894 ret = soc_hw_sanity_check(substream); 895 if (ret < 0) 896 goto err; 897 898 soc_pcm_apply_msb(substream); 899 900 /* Symmetry only applies if we've already got an active stream. */ 901 for_each_rtd_dais(rtd, i, dai) { 902 ret = soc_pcm_apply_symmetry(substream, dai); 903 if (ret != 0) 904 goto err; 905 } 906 dynamic: 907 snd_soc_runtime_activate(rtd, substream->stream); 908 ret = 0; 909 err: 910 if (ret < 0) 911 soc_pcm_clean(rtd, substream, 1); 912 913 return soc_pcm_ret(rtd, ret); 914 } 915 916 /* PCM open ops for non-DPCM streams */ 917 static int soc_pcm_open(struct snd_pcm_substream *substream) 918 { 919 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 920 int ret; 921 922 snd_soc_dpcm_mutex_lock(rtd); 923 ret = __soc_pcm_open(rtd, substream); 924 snd_soc_dpcm_mutex_unlock(rtd); 925 return ret; 926 } 927 928 /* 929 * Called by ALSA when the PCM substream is prepared, can set format, sample 930 * rate, etc. This function is non atomic and can be called multiple times, 931 * it can refer to the runtime info. 932 */ 933 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 934 struct snd_pcm_substream *substream) 935 { 936 struct snd_soc_dai *dai; 937 int i, ret = 0; 938 939 snd_soc_dpcm_mutex_assert_held(rtd); 940 941 ret = snd_soc_link_prepare(substream); 942 if (ret < 0) 943 goto out; 944 945 ret = snd_soc_pcm_component_prepare(substream); 946 if (ret < 0) 947 goto out; 948 949 ret = snd_soc_pcm_dai_prepare(substream); 950 if (ret < 0) 951 goto out; 952 953 /* cancel any delayed stream shutdown that is pending */ 954 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 955 rtd->pop_wait) { 956 rtd->pop_wait = 0; 957 cancel_delayed_work(&rtd->delayed_work); 958 } 959 960 snd_soc_dapm_stream_event(rtd, substream->stream, 961 SND_SOC_DAPM_STREAM_START); 962 963 for_each_rtd_dais(rtd, i, dai) { 964 if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai)) 965 snd_soc_dai_digital_mute(dai, 0, substream->stream); 966 } 967 968 out: 969 /* 970 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 971 * 972 * We don't want to log an error since we do not want to give userspace a way to do a 973 * denial-of-service attack on the syslog / diskspace. 974 */ 975 return ret; 976 } 977 978 /* PCM prepare ops for non-DPCM streams */ 979 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 980 { 981 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 982 int ret; 983 984 snd_soc_dpcm_mutex_lock(rtd); 985 ret = __soc_pcm_prepare(rtd, substream); 986 snd_soc_dpcm_mutex_unlock(rtd); 987 988 /* 989 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 990 * 991 * We don't want to log an error since we do not want to give userspace a way to do a 992 * denial-of-service attack on the syslog / diskspace. 993 */ 994 return ret; 995 } 996 997 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 998 unsigned int mask) 999 { 1000 struct snd_interval *interval; 1001 int channels = hweight_long(mask); 1002 1003 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 1004 interval->min = channels; 1005 interval->max = channels; 1006 } 1007 1008 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 1009 struct snd_pcm_substream *substream, int rollback) 1010 { 1011 struct snd_soc_dai *dai; 1012 int i; 1013 1014 snd_soc_dpcm_mutex_assert_held(rtd); 1015 1016 /* clear the corresponding DAIs parameters when going to be inactive */ 1017 for_each_rtd_dais(rtd, i, dai) { 1018 if (snd_soc_dai_active(dai) == 1) 1019 soc_pcm_set_dai_params(dai, NULL); 1020 1021 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) { 1022 if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai)) 1023 snd_soc_dai_digital_mute(dai, 1, substream->stream); 1024 } 1025 } 1026 1027 /* run the stream event */ 1028 snd_soc_dapm_stream_stop(rtd, substream->stream); 1029 1030 /* free any machine hw params */ 1031 snd_soc_link_hw_free(substream, rollback); 1032 1033 /* free any component resources */ 1034 snd_soc_pcm_component_hw_free(substream, rollback); 1035 1036 /* now free hw params for the DAIs */ 1037 for_each_rtd_dais(rtd, i, dai) 1038 if (snd_soc_dai_stream_valid(dai, substream->stream)) 1039 snd_soc_dai_hw_free(dai, substream, rollback); 1040 1041 return 0; 1042 } 1043 1044 /* 1045 * Frees resources allocated by hw_params, can be called multiple times 1046 */ 1047 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 1048 struct snd_pcm_substream *substream) 1049 { 1050 return soc_pcm_hw_clean(rtd, substream, 0); 1051 } 1052 1053 /* hw_free PCM ops for non-DPCM streams */ 1054 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 1055 { 1056 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1057 int ret; 1058 1059 snd_soc_dpcm_mutex_lock(rtd); 1060 ret = __soc_pcm_hw_free(rtd, substream); 1061 snd_soc_dpcm_mutex_unlock(rtd); 1062 return ret; 1063 } 1064 1065 /* 1066 * Called by ALSA when the hardware params are set by application. This 1067 * function can also be called multiple times and can allocate buffers 1068 * (using snd_pcm_lib_* ). It's non-atomic. 1069 */ 1070 static int __soc_pcm_hw_params(struct snd_pcm_substream *substream, 1071 struct snd_pcm_hw_params *params) 1072 { 1073 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1074 struct snd_soc_dai *cpu_dai; 1075 struct snd_soc_dai *codec_dai; 1076 struct snd_pcm_hw_params tmp_params; 1077 int i, ret = 0; 1078 1079 snd_soc_dpcm_mutex_assert_held(rtd); 1080 1081 ret = soc_pcm_params_symmetry(substream, params); 1082 if (ret) 1083 goto out; 1084 1085 ret = snd_soc_link_hw_params(substream, params); 1086 if (ret < 0) 1087 goto out; 1088 1089 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1090 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); 1091 1092 /* 1093 * Skip CODECs which don't support the current stream type, 1094 * the idea being that if a CODEC is not used for the currently 1095 * set up transfer direction, it should not need to be 1096 * configured, especially since the configuration used might 1097 * not even be supported by that CODEC. There may be cases 1098 * however where a CODEC needs to be set up although it is 1099 * actually not being used for the transfer, e.g. if a 1100 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1101 * for the DAI link including a playback-only CODEC. 1102 * If this becomes necessary, we will have to augment the 1103 * machine driver setup with information on how to act, so 1104 * we can do the right thing here. 1105 */ 1106 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1107 continue; 1108 1109 /* copy params for each codec */ 1110 tmp_params = *params; 1111 1112 /* fixup params based on TDM slot masks */ 1113 if (tdm_mask) 1114 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask); 1115 1116 ret = snd_soc_dai_hw_params(codec_dai, substream, 1117 &tmp_params); 1118 if(ret < 0) 1119 goto out; 1120 1121 soc_pcm_set_dai_params(codec_dai, &tmp_params); 1122 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai); 1123 } 1124 1125 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1126 struct snd_soc_dai_link_ch_map *ch_maps; 1127 unsigned int ch_mask = 0; 1128 int j; 1129 1130 /* 1131 * Skip CPUs which don't support the current stream 1132 * type. See soc_pcm_init_runtime_hw() for more details 1133 */ 1134 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1135 continue; 1136 1137 /* copy params for each cpu */ 1138 tmp_params = *params; 1139 1140 /* 1141 * construct cpu channel mask by combining ch_mask of each 1142 * codec which maps to the cpu. 1143 * see 1144 * soc.h :: [dai_link->ch_maps Image sample] 1145 */ 1146 for_each_rtd_ch_maps(rtd, j, ch_maps) 1147 if (ch_maps->cpu == i) 1148 ch_mask |= ch_maps->ch_mask; 1149 1150 /* fixup cpu channel number */ 1151 if (ch_mask) 1152 soc_pcm_codec_params_fixup(&tmp_params, ch_mask); 1153 1154 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params); 1155 if (ret < 0) 1156 goto out; 1157 1158 /* store the parameters for each DAI */ 1159 soc_pcm_set_dai_params(cpu_dai, &tmp_params); 1160 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai); 1161 } 1162 1163 ret = snd_soc_pcm_component_hw_params(substream, params); 1164 out: 1165 if (ret < 0) 1166 soc_pcm_hw_clean(rtd, substream, 1); 1167 1168 return soc_pcm_ret(rtd, ret); 1169 } 1170 1171 /* hw_params PCM ops for non-DPCM streams */ 1172 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1173 struct snd_pcm_hw_params *params) 1174 { 1175 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1176 int ret; 1177 1178 snd_soc_dpcm_mutex_lock(rtd); 1179 ret = __soc_pcm_hw_params(substream, params); 1180 snd_soc_dpcm_mutex_unlock(rtd); 1181 return ret; 1182 } 1183 1184 #define TRIGGER_MAX 3 1185 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = { 1186 [SND_SOC_TRIGGER_ORDER_DEFAULT] = { 1187 snd_soc_link_trigger, 1188 snd_soc_pcm_component_trigger, 1189 snd_soc_pcm_dai_trigger, 1190 }, 1191 [SND_SOC_TRIGGER_ORDER_LDC] = { 1192 snd_soc_link_trigger, 1193 snd_soc_pcm_dai_trigger, 1194 snd_soc_pcm_component_trigger, 1195 }, 1196 }; 1197 1198 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1199 { 1200 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1201 struct snd_soc_component *component; 1202 int ret = 0, r = 0, i; 1203 int rollback = 0; 1204 int start = 0, stop = 0; 1205 1206 /* 1207 * select START/STOP sequence 1208 */ 1209 for_each_rtd_components(rtd, i, component) { 1210 if (component->driver->trigger_start) 1211 start = component->driver->trigger_start; 1212 if (component->driver->trigger_stop) 1213 stop = component->driver->trigger_stop; 1214 } 1215 if (rtd->dai_link->trigger_start) 1216 start = rtd->dai_link->trigger_start; 1217 if (rtd->dai_link->trigger_stop) 1218 stop = rtd->dai_link->trigger_stop; 1219 1220 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX || 1221 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX) 1222 return -EINVAL; 1223 1224 /* 1225 * START 1226 */ 1227 switch (cmd) { 1228 case SNDRV_PCM_TRIGGER_START: 1229 case SNDRV_PCM_TRIGGER_RESUME: 1230 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1231 for (i = 0; i < TRIGGER_MAX; i++) { 1232 r = trigger[start][i](substream, cmd, 0); 1233 if (r < 0) 1234 break; 1235 } 1236 } 1237 1238 /* 1239 * Rollback if START failed 1240 * find correspond STOP command 1241 */ 1242 if (r < 0) { 1243 rollback = 1; 1244 ret = r; 1245 switch (cmd) { 1246 case SNDRV_PCM_TRIGGER_START: 1247 cmd = SNDRV_PCM_TRIGGER_STOP; 1248 break; 1249 case SNDRV_PCM_TRIGGER_RESUME: 1250 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1251 break; 1252 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1253 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1254 break; 1255 } 1256 } 1257 1258 /* 1259 * STOP 1260 */ 1261 switch (cmd) { 1262 case SNDRV_PCM_TRIGGER_STOP: 1263 case SNDRV_PCM_TRIGGER_SUSPEND: 1264 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1265 for (i = TRIGGER_MAX; i > 0; i--) { 1266 r = trigger[stop][i - 1](substream, cmd, rollback); 1267 if (r < 0) 1268 ret = r; 1269 } 1270 } 1271 1272 return ret; 1273 } 1274 1275 /* 1276 * soc level wrapper for pointer callback 1277 * If cpu_dai, codec_dai, component driver has the delay callback, then 1278 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1279 */ 1280 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1281 { 1282 struct snd_pcm_runtime *runtime = substream->runtime; 1283 snd_pcm_uframes_t offset = 0; 1284 snd_pcm_sframes_t codec_delay = 0; 1285 snd_pcm_sframes_t cpu_delay = 0; 1286 1287 offset = snd_soc_pcm_component_pointer(substream); 1288 1289 /* should be called *after* snd_soc_pcm_component_pointer() */ 1290 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1291 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1292 1293 runtime->delay = cpu_delay + codec_delay; 1294 1295 return offset; 1296 } 1297 1298 /* connect a FE and BE */ 1299 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1300 struct snd_soc_pcm_runtime *be, int stream) 1301 { 1302 struct snd_pcm_substream *fe_substream; 1303 struct snd_pcm_substream *be_substream; 1304 struct snd_soc_dpcm *dpcm; 1305 1306 snd_soc_dpcm_mutex_assert_held(fe); 1307 1308 /* only add new dpcms */ 1309 for_each_dpcm_be(fe, stream, dpcm) 1310 if (dpcm->be == be) 1311 return 0; 1312 1313 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1314 be_substream = snd_soc_dpcm_get_substream(be, stream); 1315 1316 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) 1317 return snd_soc_ret(be->dev, -EINVAL, 1318 "%s: %s is atomic but %s is nonatomic, invalid configuration\n", 1319 __func__, fe->dai_link->name, be->dai_link->name); 1320 1321 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1322 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1323 be_substream->pcm->nonatomic = 1; 1324 } 1325 1326 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1327 if (!dpcm) 1328 return -ENOMEM; 1329 1330 dpcm->be = be; 1331 dpcm->fe = fe; 1332 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1333 snd_pcm_stream_lock_irq(fe_substream); 1334 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1335 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1336 snd_pcm_stream_unlock_irq(fe_substream); 1337 1338 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1339 snd_pcm_direction_name(stream), fe->dai_link->name, 1340 stream ? "<-" : "->", be->dai_link->name); 1341 1342 dpcm_create_debugfs_state(dpcm, stream); 1343 1344 return 1; 1345 } 1346 1347 /* reparent a BE onto another FE */ 1348 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1349 struct snd_soc_pcm_runtime *be, int stream) 1350 { 1351 struct snd_soc_dpcm *dpcm; 1352 struct snd_pcm_substream *fe_substream, *be_substream; 1353 1354 /* reparent if BE is connected to other FEs */ 1355 if (!be->dpcm[stream].users) 1356 return; 1357 1358 be_substream = snd_soc_dpcm_get_substream(be, stream); 1359 if (!be_substream) 1360 return; 1361 1362 for_each_dpcm_fe(be, stream, dpcm) { 1363 if (dpcm->fe == fe) 1364 continue; 1365 1366 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1367 snd_pcm_direction_name(stream), 1368 dpcm->fe->dai_link->name, 1369 stream ? "<-" : "->", dpcm->be->dai_link->name); 1370 1371 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1372 be_substream->runtime = fe_substream->runtime; 1373 break; 1374 } 1375 } 1376 1377 /* disconnect a BE and FE */ 1378 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1379 { 1380 struct snd_soc_dpcm *dpcm, *d; 1381 struct snd_pcm_substream *substream = snd_soc_dpcm_get_substream(fe, stream); 1382 LIST_HEAD(deleted_dpcms); 1383 1384 snd_soc_dpcm_mutex_assert_held(fe); 1385 1386 snd_pcm_stream_lock_irq(substream); 1387 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1388 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1389 snd_pcm_direction_name(stream), 1390 dpcm->be->dai_link->name); 1391 1392 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1393 continue; 1394 1395 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1396 snd_pcm_direction_name(stream), fe->dai_link->name, 1397 stream ? "<-" : "->", dpcm->be->dai_link->name); 1398 1399 /* BEs still alive need new FE */ 1400 dpcm_be_reparent(fe, dpcm->be, stream); 1401 1402 list_del(&dpcm->list_be); 1403 list_move(&dpcm->list_fe, &deleted_dpcms); 1404 } 1405 snd_pcm_stream_unlock_irq(substream); 1406 1407 while (!list_empty(&deleted_dpcms)) { 1408 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1409 list_fe); 1410 list_del(&dpcm->list_fe); 1411 dpcm_remove_debugfs_state(dpcm); 1412 kfree(dpcm); 1413 } 1414 } 1415 1416 /* get BE for DAI widget and stream */ 1417 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1418 struct snd_soc_dapm_widget *widget, int stream) 1419 { 1420 struct snd_soc_pcm_runtime *be; 1421 struct snd_soc_dapm_widget *w; 1422 struct snd_soc_dai *dai; 1423 int i; 1424 1425 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1426 1427 for_each_card_rtds(card, be) { 1428 1429 if (!be->dai_link->no_pcm) 1430 continue; 1431 1432 if (!snd_soc_dpcm_get_substream(be, stream)) 1433 continue; 1434 1435 for_each_rtd_dais(be, i, dai) { 1436 w = snd_soc_dai_get_widget(dai, stream); 1437 1438 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1439 w ? w->name : "(not set)"); 1440 1441 if (w == widget) 1442 return be; 1443 } 1444 } 1445 1446 /* Widget provided is not a BE */ 1447 return NULL; 1448 } 1449 1450 int widget_in_list(struct snd_soc_dapm_widget_list *list, 1451 struct snd_soc_dapm_widget *widget) 1452 { 1453 struct snd_soc_dapm_widget *w; 1454 int i; 1455 1456 for_each_dapm_widgets(list, i, w) 1457 if (widget == w) 1458 return 1; 1459 1460 return 0; 1461 } 1462 EXPORT_SYMBOL_GPL(widget_in_list); 1463 1464 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1465 { 1466 struct snd_soc_card *card = snd_soc_dapm_to_card(widget->dapm); 1467 struct snd_soc_pcm_runtime *rtd; 1468 int stream; 1469 1470 /* adjust dir to stream */ 1471 if (dir == SND_SOC_DAPM_DIR_OUT) 1472 stream = SNDRV_PCM_STREAM_PLAYBACK; 1473 else 1474 stream = SNDRV_PCM_STREAM_CAPTURE; 1475 1476 rtd = dpcm_get_be(card, widget, stream); 1477 if (rtd) 1478 return true; 1479 1480 return false; 1481 } 1482 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1483 1484 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1485 int stream, struct snd_soc_dapm_widget_list **list) 1486 { 1487 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0); 1488 int paths; 1489 1490 if (fe->dai_link->num_cpus > 1) 1491 return snd_soc_ret(fe->dev, -EINVAL, 1492 "%s doesn't support Multi CPU yet\n", __func__); 1493 1494 /* get number of valid DAI paths and their widgets */ 1495 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1496 fe->card->component_chaining ? 1497 NULL : dpcm_end_walk_at_be); 1498 1499 if (paths > 0) 1500 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1501 snd_pcm_direction_name(stream)); 1502 else if (paths == 0) 1503 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1504 snd_pcm_direction_name(stream)); 1505 1506 return paths; 1507 } 1508 1509 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1510 { 1511 snd_soc_dapm_dai_free_widgets(list); 1512 } 1513 1514 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1515 struct snd_soc_dapm_widget_list *list) 1516 { 1517 struct snd_soc_dai *dai; 1518 unsigned int i; 1519 1520 /* is there a valid DAI widget for this BE */ 1521 for_each_rtd_dais(dpcm->be, i, dai) { 1522 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1523 1524 /* 1525 * The BE is pruned only if none of the dai 1526 * widgets are in the active list. 1527 */ 1528 if (widget && widget_in_list(list, widget)) 1529 return true; 1530 } 1531 1532 return false; 1533 } 1534 1535 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1536 struct snd_soc_dapm_widget_list **list_) 1537 { 1538 struct snd_soc_dpcm *dpcm; 1539 int prune = 0; 1540 1541 /* Destroy any old FE <--> BE connections */ 1542 for_each_dpcm_be(fe, stream, dpcm) { 1543 if (dpcm_be_is_active(dpcm, stream, *list_)) 1544 continue; 1545 1546 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1547 snd_pcm_direction_name(stream), 1548 dpcm->be->dai_link->name, fe->dai_link->name); 1549 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1550 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1551 prune++; 1552 } 1553 1554 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1555 return prune; 1556 } 1557 1558 int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1559 struct snd_soc_dapm_widget_list **list_) 1560 { 1561 struct snd_soc_card *card = fe->card; 1562 struct snd_soc_dapm_widget_list *list = *list_; 1563 struct snd_soc_pcm_runtime *be; 1564 struct snd_soc_dapm_widget *widget; 1565 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1566 int i, new = 0, err; 1567 1568 /* don't connect if FE is not running */ 1569 if (!fe_substream->runtime && !fe->fe_compr) 1570 return new; 1571 1572 /* Create any new FE <--> BE connections */ 1573 for_each_dapm_widgets(list, i, widget) { 1574 1575 switch (widget->id) { 1576 case snd_soc_dapm_dai_in: 1577 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1578 continue; 1579 break; 1580 case snd_soc_dapm_dai_out: 1581 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1582 continue; 1583 break; 1584 default: 1585 continue; 1586 } 1587 1588 /* is there a valid BE rtd for this widget */ 1589 be = dpcm_get_be(card, widget, stream); 1590 if (!be) { 1591 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1592 widget->name); 1593 continue; 1594 } 1595 1596 /* 1597 * Filter for systems with 'component_chaining' enabled. 1598 * This helps to avoid unnecessary re-configuration of an 1599 * already active BE on such systems and ensures the BE DAI 1600 * widget is powered ON after hw_params() BE DAI callback. 1601 */ 1602 if (fe->card->component_chaining && 1603 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1604 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1605 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1606 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1607 continue; 1608 1609 /* newly connected FE and BE */ 1610 err = dpcm_be_connect(fe, be, stream); 1611 if (err < 0) { 1612 dev_err(fe->dev, "ASoC: can't connect %s\n", 1613 widget->name); 1614 break; 1615 } else if (err == 0) /* already connected */ 1616 continue; 1617 1618 /* new */ 1619 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1620 new++; 1621 } 1622 1623 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1624 return new; 1625 } 1626 1627 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1628 { 1629 struct snd_soc_dpcm *dpcm; 1630 1631 for_each_dpcm_be(fe, stream, dpcm) 1632 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1633 } 1634 1635 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1636 int do_hw_free, struct snd_soc_dpcm *last) 1637 { 1638 struct snd_soc_dpcm *dpcm; 1639 1640 /* disable any enabled and non active backends */ 1641 for_each_dpcm_be(fe, stream, dpcm) { 1642 struct snd_soc_pcm_runtime *be = dpcm->be; 1643 struct snd_pcm_substream *be_substream = 1644 snd_soc_dpcm_get_substream(be, stream); 1645 1646 if (dpcm == last) 1647 return; 1648 1649 /* is this op for this BE ? */ 1650 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 1651 continue; 1652 1653 if (be->dpcm[stream].users == 0) { 1654 dev_err(be->dev, "ASoC: no users %s at close - state %s\n", 1655 snd_pcm_direction_name(stream), 1656 dpcm_state_string(be->dpcm[stream].state)); 1657 continue; 1658 } 1659 1660 if (--be->dpcm[stream].users != 0) 1661 continue; 1662 1663 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1664 if (!do_hw_free) 1665 continue; 1666 1667 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1668 __soc_pcm_hw_free(be, be_substream); 1669 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1670 } 1671 } 1672 1673 __soc_pcm_close(be, be_substream); 1674 be_substream->runtime = NULL; 1675 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1676 } 1677 } 1678 1679 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1680 { 1681 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1682 struct snd_soc_pcm_runtime *be; 1683 struct snd_soc_dpcm *dpcm; 1684 int err, count = 0; 1685 1686 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1687 for_each_dpcm_be(fe, stream, dpcm) { 1688 struct snd_pcm_substream *be_substream; 1689 1690 be = dpcm->be; 1691 be_substream = snd_soc_dpcm_get_substream(be, stream); 1692 1693 if (!be_substream) { 1694 dev_err(be->dev, "ASoC: no backend %s stream\n", 1695 snd_pcm_direction_name(stream)); 1696 continue; 1697 } 1698 1699 /* is this op for this BE ? */ 1700 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 1701 continue; 1702 1703 /* first time the dpcm is open ? */ 1704 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1705 dev_err(be->dev, "ASoC: too many users %s at open %s\n", 1706 snd_pcm_direction_name(stream), 1707 dpcm_state_string(be->dpcm[stream].state)); 1708 continue; 1709 } 1710 1711 if (be->dpcm[stream].users++ != 0) 1712 continue; 1713 1714 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1715 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1716 continue; 1717 1718 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1719 snd_pcm_direction_name(stream), be->dai_link->name); 1720 1721 be_substream->runtime = fe_substream->runtime; 1722 err = __soc_pcm_open(be, be_substream); 1723 if (err < 0) { 1724 be->dpcm[stream].users--; 1725 if (be->dpcm[stream].users < 0) 1726 dev_err(be->dev, "ASoC: no users %s at unwind %s\n", 1727 snd_pcm_direction_name(stream), 1728 dpcm_state_string(be->dpcm[stream].state)); 1729 1730 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1731 goto unwind; 1732 } 1733 be->dpcm[stream].be_start = 0; 1734 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1735 count++; 1736 } 1737 1738 return count; 1739 1740 unwind: 1741 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1742 1743 return soc_pcm_ret(fe, err); 1744 } 1745 1746 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1747 { 1748 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1749 struct snd_pcm_runtime *runtime = substream->runtime; 1750 struct snd_pcm_hardware *hw = &runtime->hw; 1751 struct snd_soc_dai *dai; 1752 int stream = substream->stream; 1753 int i; 1754 1755 soc_pcm_hw_init(hw, false); 1756 1757 for_each_rtd_cpu_dais(fe, i, dai) { 1758 const struct snd_soc_pcm_stream *cpu_stream; 1759 1760 /* 1761 * Skip CPUs which don't support the current stream 1762 * type. See soc_pcm_init_runtime_hw() for more details 1763 */ 1764 if (!snd_soc_dai_stream_valid(dai, stream)) 1765 continue; 1766 1767 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1768 1769 soc_pcm_hw_update_rate(hw, cpu_stream); 1770 soc_pcm_hw_update_chan(hw, cpu_stream); 1771 soc_pcm_hw_update_format(hw, cpu_stream); 1772 } 1773 1774 } 1775 1776 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1777 { 1778 struct snd_soc_pcm_runtime *fe = snd_soc_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 struct snd_soc_dai *dai; 1783 int stream = substream->stream; 1784 1785 if (!fe->dai_link->dpcm_merged_format) 1786 return; 1787 1788 /* 1789 * It returns merged BE codec format 1790 * if FE want to use it (= dpcm_merged_format) 1791 */ 1792 1793 for_each_dpcm_be(fe, stream, dpcm) { 1794 struct snd_soc_pcm_runtime *be = dpcm->be; 1795 const struct snd_soc_pcm_stream *codec_stream; 1796 int i; 1797 1798 for_each_rtd_codec_dais(be, i, dai) { 1799 /* 1800 * Skip CODECs 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 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1807 1808 soc_pcm_hw_update_format(hw, codec_stream); 1809 } 1810 } 1811 } 1812 1813 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1814 { 1815 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1816 struct snd_pcm_runtime *runtime = substream->runtime; 1817 struct snd_pcm_hardware *hw = &runtime->hw; 1818 struct snd_soc_dpcm *dpcm; 1819 int stream = substream->stream; 1820 1821 if (!fe->dai_link->dpcm_merged_chan) 1822 return; 1823 1824 /* 1825 * It returns merged BE codec channel; 1826 * if FE want to use it (= dpcm_merged_chan) 1827 */ 1828 1829 for_each_dpcm_be(fe, stream, dpcm) { 1830 struct snd_soc_pcm_runtime *be = dpcm->be; 1831 const struct snd_soc_pcm_stream *cpu_stream; 1832 struct snd_soc_dai *dai; 1833 int i; 1834 1835 for_each_rtd_cpu_dais(be, i, dai) { 1836 /* 1837 * Skip CPUs which don't support the current stream 1838 * type. See soc_pcm_init_runtime_hw() for more details 1839 */ 1840 if (!snd_soc_dai_stream_valid(dai, stream)) 1841 continue; 1842 1843 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1844 1845 soc_pcm_hw_update_chan(hw, cpu_stream); 1846 } 1847 1848 /* 1849 * chan min/max cannot be enforced if there are multiple CODEC 1850 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1851 */ 1852 if (be->dai_link->num_codecs == 1) { 1853 const struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1854 snd_soc_rtd_to_codec(be, 0), stream); 1855 1856 soc_pcm_hw_update_chan(hw, codec_stream); 1857 } 1858 } 1859 } 1860 1861 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1862 { 1863 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1864 struct snd_pcm_runtime *runtime = substream->runtime; 1865 struct snd_pcm_hardware *hw = &runtime->hw; 1866 struct snd_soc_dpcm *dpcm; 1867 int stream = substream->stream; 1868 1869 if (!fe->dai_link->dpcm_merged_rate) 1870 return; 1871 1872 /* 1873 * It returns merged BE codec channel; 1874 * if FE want to use it (= dpcm_merged_chan) 1875 */ 1876 1877 for_each_dpcm_be(fe, stream, dpcm) { 1878 struct snd_soc_pcm_runtime *be = dpcm->be; 1879 const struct snd_soc_pcm_stream *pcm; 1880 struct snd_soc_dai *dai; 1881 int i; 1882 1883 for_each_rtd_dais(be, i, dai) { 1884 /* 1885 * Skip DAIs which don't support the current stream 1886 * type. See soc_pcm_init_runtime_hw() for more details 1887 */ 1888 if (!snd_soc_dai_stream_valid(dai, stream)) 1889 continue; 1890 1891 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1892 1893 soc_pcm_hw_update_rate(hw, pcm); 1894 } 1895 } 1896 } 1897 1898 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1899 int stream) 1900 { 1901 struct snd_soc_dpcm *dpcm; 1902 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 1903 struct snd_soc_dai *fe_cpu_dai; 1904 int err = 0; 1905 int i; 1906 1907 /* apply symmetry for FE */ 1908 soc_pcm_update_symmetry(fe_substream); 1909 1910 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1911 /* Symmetry only applies if we've got an active stream. */ 1912 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1913 if (err < 0) 1914 goto error; 1915 } 1916 1917 /* apply symmetry for BE */ 1918 for_each_dpcm_be(fe, stream, dpcm) { 1919 struct snd_soc_pcm_runtime *be = dpcm->be; 1920 struct snd_pcm_substream *be_substream = 1921 snd_soc_dpcm_get_substream(be, stream); 1922 struct snd_soc_pcm_runtime *rtd; 1923 struct snd_soc_dai *dai; 1924 1925 /* A backend may not have the requested substream */ 1926 if (!be_substream) 1927 continue; 1928 1929 rtd = snd_soc_substream_to_rtd(be_substream); 1930 if (rtd->dai_link->be_hw_params_fixup) 1931 continue; 1932 1933 soc_pcm_update_symmetry(be_substream); 1934 1935 /* Symmetry only applies if we've got an active stream. */ 1936 for_each_rtd_dais(rtd, i, dai) { 1937 err = soc_pcm_apply_symmetry(fe_substream, dai); 1938 if (err < 0) 1939 goto error; 1940 } 1941 } 1942 error: 1943 return soc_pcm_ret(fe, err); 1944 } 1945 1946 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1947 { 1948 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 1949 int stream = fe_substream->stream, ret = 0; 1950 1951 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1952 1953 ret = dpcm_be_dai_startup(fe, stream); 1954 if (ret < 0) 1955 goto be_err; 1956 1957 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1958 1959 /* start the DAI frontend */ 1960 ret = __soc_pcm_open(fe, fe_substream); 1961 if (ret < 0) 1962 goto unwind; 1963 1964 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1965 1966 dpcm_runtime_setup_fe(fe_substream); 1967 1968 dpcm_runtime_setup_be_format(fe_substream); 1969 dpcm_runtime_setup_be_chan(fe_substream); 1970 dpcm_runtime_setup_be_rate(fe_substream); 1971 1972 ret = dpcm_apply_symmetry(fe_substream, stream); 1973 1974 unwind: 1975 if (ret < 0) 1976 dpcm_be_dai_startup_unwind(fe, stream); 1977 be_err: 1978 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1979 1980 return soc_pcm_ret(fe, ret); 1981 } 1982 1983 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1984 { 1985 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1986 int stream = substream->stream; 1987 1988 snd_soc_dpcm_mutex_assert_held(fe); 1989 1990 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1991 1992 /* shutdown the BEs */ 1993 dpcm_be_dai_shutdown(fe, stream); 1994 1995 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1996 1997 /* now shutdown the frontend */ 1998 __soc_pcm_close(fe, substream); 1999 2000 /* run the stream stop event */ 2001 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 2002 2003 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2004 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2005 return 0; 2006 } 2007 2008 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 2009 { 2010 struct snd_soc_dpcm *dpcm; 2011 2012 /* only hw_params backends that are either sinks or sources 2013 * to this frontend DAI */ 2014 for_each_dpcm_be(fe, stream, dpcm) { 2015 2016 struct snd_soc_pcm_runtime *be = dpcm->be; 2017 struct snd_pcm_substream *be_substream = 2018 snd_soc_dpcm_get_substream(be, stream); 2019 2020 /* is this op for this BE ? */ 2021 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2022 continue; 2023 2024 /* only free hw when no longer used - check all FEs */ 2025 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2026 continue; 2027 2028 /* do not free hw if this BE is used by other FE */ 2029 if (be->dpcm[stream].users > 1) 2030 continue; 2031 2032 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2033 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2034 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2035 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2036 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2037 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2038 continue; 2039 2040 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2041 be->dai_link->name); 2042 2043 __soc_pcm_hw_free(be, be_substream); 2044 2045 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2046 } 2047 } 2048 2049 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2050 { 2051 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2052 int stream = substream->stream; 2053 2054 snd_soc_dpcm_mutex_lock(fe); 2055 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2056 2057 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2058 2059 /* call hw_free on the frontend */ 2060 soc_pcm_hw_clean(fe, substream, 0); 2061 2062 /* only hw_params backends that are either sinks or sources 2063 * to this frontend DAI */ 2064 dpcm_be_dai_hw_free(fe, stream); 2065 2066 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2067 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2068 2069 snd_soc_dpcm_mutex_unlock(fe); 2070 return 0; 2071 } 2072 2073 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2074 { 2075 struct snd_soc_pcm_runtime *be; 2076 struct snd_pcm_substream *be_substream; 2077 struct snd_soc_dpcm *dpcm; 2078 int ret; 2079 2080 for_each_dpcm_be(fe, stream, dpcm) { 2081 struct snd_pcm_hw_params hw_params; 2082 2083 be = dpcm->be; 2084 be_substream = snd_soc_dpcm_get_substream(be, stream); 2085 2086 /* is this op for this BE ? */ 2087 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2088 continue; 2089 2090 /* copy params for each dpcm */ 2091 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 2092 sizeof(struct snd_pcm_hw_params)); 2093 2094 /* perform any hw_params fixups */ 2095 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 2096 if (ret < 0) 2097 goto unwind; 2098 2099 /* copy the fixed-up hw params for BE dai */ 2100 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2101 sizeof(struct snd_pcm_hw_params)); 2102 2103 /* only allow hw_params() if no connected FEs are running */ 2104 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2105 continue; 2106 2107 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2108 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2109 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2110 continue; 2111 2112 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2113 be->dai_link->name); 2114 2115 ret = __soc_pcm_hw_params(be_substream, &hw_params); 2116 if (ret < 0) 2117 goto unwind; 2118 2119 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2120 } 2121 return 0; 2122 2123 unwind: 2124 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2125 __func__, be->dai_link->name, ret); 2126 2127 /* disable any enabled and non active backends */ 2128 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2129 be = dpcm->be; 2130 be_substream = snd_soc_dpcm_get_substream(be, stream); 2131 2132 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2133 continue; 2134 2135 /* only allow hw_free() if no connected FEs are running */ 2136 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2137 continue; 2138 2139 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2140 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2141 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2142 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2143 continue; 2144 2145 __soc_pcm_hw_free(be, be_substream); 2146 } 2147 2148 return ret; 2149 } 2150 2151 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2152 struct snd_pcm_hw_params *params) 2153 { 2154 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2155 int ret, stream = substream->stream; 2156 2157 snd_soc_dpcm_mutex_lock(fe); 2158 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2159 2160 memcpy(&fe->dpcm[stream].hw_params, params, 2161 sizeof(struct snd_pcm_hw_params)); 2162 ret = dpcm_be_dai_hw_params(fe, stream); 2163 if (ret < 0) 2164 goto out; 2165 2166 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2167 fe->dai_link->name, params_rate(params), 2168 params_channels(params), params_format(params)); 2169 2170 /* call hw_params on the frontend */ 2171 ret = __soc_pcm_hw_params(substream, params); 2172 if (ret < 0) 2173 dpcm_be_dai_hw_free(fe, stream); 2174 else 2175 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2176 2177 out: 2178 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2179 snd_soc_dpcm_mutex_unlock(fe); 2180 2181 return soc_pcm_ret(fe, ret); 2182 } 2183 2184 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2185 int cmd) 2186 { 2187 struct snd_soc_pcm_runtime *be; 2188 bool pause_stop_transition; 2189 struct snd_soc_dpcm *dpcm; 2190 unsigned long flags; 2191 int ret = 0; 2192 2193 for_each_dpcm_be(fe, stream, dpcm) { 2194 struct snd_pcm_substream *be_substream; 2195 2196 be = dpcm->be; 2197 be_substream = snd_soc_dpcm_get_substream(be, stream); 2198 2199 snd_pcm_stream_lock_irqsave_nested(be_substream, flags); 2200 2201 /* is this op for this BE ? */ 2202 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2203 goto next; 2204 2205 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2206 be->dai_link->name, cmd); 2207 2208 switch (cmd) { 2209 case SNDRV_PCM_TRIGGER_START: 2210 if (!be->dpcm[stream].be_start && 2211 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2212 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2213 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2214 goto next; 2215 2216 be->dpcm[stream].be_start++; 2217 if (be->dpcm[stream].be_start != 1) 2218 goto next; 2219 2220 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2221 ret = soc_pcm_trigger(be_substream, 2222 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2223 else 2224 ret = soc_pcm_trigger(be_substream, 2225 SNDRV_PCM_TRIGGER_START); 2226 if (ret) { 2227 be->dpcm[stream].be_start--; 2228 goto next; 2229 } 2230 2231 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2232 break; 2233 case SNDRV_PCM_TRIGGER_RESUME: 2234 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2235 goto next; 2236 2237 be->dpcm[stream].be_start++; 2238 if (be->dpcm[stream].be_start != 1) 2239 goto next; 2240 2241 ret = soc_pcm_trigger(be_substream, cmd); 2242 if (ret) { 2243 be->dpcm[stream].be_start--; 2244 goto next; 2245 } 2246 2247 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2248 break; 2249 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2250 if (!be->dpcm[stream].be_start && 2251 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2252 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2253 goto next; 2254 2255 fe->dpcm[stream].fe_pause = false; 2256 be->dpcm[stream].be_pause--; 2257 2258 be->dpcm[stream].be_start++; 2259 if (be->dpcm[stream].be_start != 1) 2260 goto next; 2261 2262 ret = soc_pcm_trigger(be_substream, cmd); 2263 if (ret) { 2264 be->dpcm[stream].be_start--; 2265 goto next; 2266 } 2267 2268 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2269 break; 2270 case SNDRV_PCM_TRIGGER_STOP: 2271 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2272 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2273 goto next; 2274 2275 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2276 be->dpcm[stream].be_start--; 2277 2278 if (be->dpcm[stream].be_start != 0) 2279 goto next; 2280 2281 pause_stop_transition = false; 2282 if (fe->dpcm[stream].fe_pause) { 2283 pause_stop_transition = true; 2284 fe->dpcm[stream].fe_pause = false; 2285 be->dpcm[stream].be_pause--; 2286 } 2287 2288 if (be->dpcm[stream].be_pause != 0) 2289 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2290 else 2291 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2292 2293 if (ret) { 2294 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2295 be->dpcm[stream].be_start++; 2296 if (pause_stop_transition) { 2297 fe->dpcm[stream].fe_pause = true; 2298 be->dpcm[stream].be_pause++; 2299 } 2300 goto next; 2301 } 2302 2303 if (be->dpcm[stream].be_pause != 0) 2304 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2305 else 2306 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2307 2308 break; 2309 case SNDRV_PCM_TRIGGER_SUSPEND: 2310 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2311 goto next; 2312 2313 be->dpcm[stream].be_start--; 2314 if (be->dpcm[stream].be_start != 0) 2315 goto next; 2316 2317 ret = soc_pcm_trigger(be_substream, cmd); 2318 if (ret) { 2319 be->dpcm[stream].be_start++; 2320 goto next; 2321 } 2322 2323 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2324 break; 2325 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2326 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2327 goto next; 2328 2329 fe->dpcm[stream].fe_pause = true; 2330 be->dpcm[stream].be_pause++; 2331 2332 be->dpcm[stream].be_start--; 2333 if (be->dpcm[stream].be_start != 0) 2334 goto next; 2335 2336 ret = soc_pcm_trigger(be_substream, cmd); 2337 if (ret) { 2338 be->dpcm[stream].be_start++; 2339 goto next; 2340 } 2341 2342 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2343 break; 2344 } 2345 next: 2346 snd_pcm_stream_unlock_irqrestore(be_substream, flags); 2347 if (ret) 2348 break; 2349 } 2350 return soc_pcm_ret(fe, ret); 2351 } 2352 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2353 2354 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2355 int cmd, bool fe_first) 2356 { 2357 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2358 int ret; 2359 2360 /* call trigger on the frontend before the backend. */ 2361 if (fe_first) { 2362 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2363 fe->dai_link->name, cmd); 2364 2365 ret = soc_pcm_trigger(substream, cmd); 2366 if (ret < 0) 2367 goto end; 2368 2369 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2370 } 2371 /* call trigger on the frontend after the backend. */ 2372 else { 2373 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2374 if (ret < 0) 2375 goto end; 2376 2377 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2378 fe->dai_link->name, cmd); 2379 2380 ret = soc_pcm_trigger(substream, cmd); 2381 } 2382 end: 2383 return snd_soc_ret(fe->dev, ret, "trigger FE cmd: %d failed\n", cmd); 2384 } 2385 2386 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2387 { 2388 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2389 int stream = substream->stream; 2390 int ret = 0; 2391 int fe_first; 2392 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2393 2394 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2395 2396 switch (trigger) { 2397 case SND_SOC_DPCM_TRIGGER_PRE: 2398 fe_first = true; 2399 break; 2400 case SND_SOC_DPCM_TRIGGER_POST: 2401 fe_first = false; 2402 break; 2403 default: 2404 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2405 fe->dai_link->name); 2406 ret = -EINVAL; 2407 goto out; 2408 } 2409 2410 switch (cmd) { 2411 case SNDRV_PCM_TRIGGER_START: 2412 case SNDRV_PCM_TRIGGER_RESUME: 2413 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2414 case SNDRV_PCM_TRIGGER_DRAIN: 2415 ret = dpcm_dai_trigger_fe_be(substream, cmd, fe_first); 2416 break; 2417 case SNDRV_PCM_TRIGGER_STOP: 2418 case SNDRV_PCM_TRIGGER_SUSPEND: 2419 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2420 ret = dpcm_dai_trigger_fe_be(substream, cmd, !fe_first); 2421 break; 2422 default: 2423 ret = -EINVAL; 2424 break; 2425 } 2426 2427 if (ret < 0) 2428 goto out; 2429 2430 switch (cmd) { 2431 case SNDRV_PCM_TRIGGER_START: 2432 case SNDRV_PCM_TRIGGER_RESUME: 2433 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2434 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2435 break; 2436 case SNDRV_PCM_TRIGGER_STOP: 2437 case SNDRV_PCM_TRIGGER_SUSPEND: 2438 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2439 break; 2440 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2441 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2442 break; 2443 } 2444 2445 out: 2446 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2447 return ret; 2448 } 2449 2450 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2451 { 2452 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2453 int stream = substream->stream; 2454 2455 /* if FE's runtime_update is already set, we're in race; 2456 * process this trigger later at exit 2457 */ 2458 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2459 fe->dpcm[stream].trigger_pending = cmd + 1; 2460 return 0; /* delayed, assuming it's successful */ 2461 } 2462 2463 /* we're alone, let's trigger */ 2464 return dpcm_fe_dai_do_trigger(substream, cmd); 2465 } 2466 2467 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2468 { 2469 struct snd_soc_dpcm *dpcm; 2470 int ret = 0; 2471 2472 for_each_dpcm_be(fe, stream, dpcm) { 2473 2474 struct snd_soc_pcm_runtime *be = dpcm->be; 2475 struct snd_pcm_substream *be_substream = 2476 snd_soc_dpcm_get_substream(be, stream); 2477 2478 /* is this op for this BE ? */ 2479 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2480 continue; 2481 2482 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream)) 2483 continue; 2484 2485 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2486 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2487 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2488 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2489 continue; 2490 2491 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2492 be->dai_link->name); 2493 2494 ret = __soc_pcm_prepare(be, be_substream); 2495 if (ret < 0) 2496 break; 2497 2498 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2499 } 2500 2501 /* 2502 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 2503 * 2504 * We don't want to log an error since we do not want to give userspace a way to do a 2505 * denial-of-service attack on the syslog / diskspace. 2506 */ 2507 return ret; 2508 } 2509 2510 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2511 { 2512 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2513 int stream = substream->stream, ret = 0; 2514 2515 snd_soc_dpcm_mutex_lock(fe); 2516 2517 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2518 2519 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2520 2521 ret = dpcm_be_dai_prepare(fe, stream); 2522 if (ret < 0) 2523 goto out; 2524 2525 /* call prepare on the frontend */ 2526 ret = __soc_pcm_prepare(fe, substream); 2527 if (ret < 0) 2528 goto out; 2529 2530 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2531 2532 out: 2533 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2534 snd_soc_dpcm_mutex_unlock(fe); 2535 2536 /* 2537 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 2538 * 2539 * We don't want to log an error since we do not want to give userspace a way to do a 2540 * denial-of-service attack on the syslog / diskspace. 2541 */ 2542 return ret; 2543 } 2544 2545 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2546 { 2547 int err; 2548 2549 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2550 snd_pcm_direction_name(stream), fe->dai_link->name); 2551 2552 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2553 2554 dpcm_be_dai_hw_free(fe, stream); 2555 2556 dpcm_be_dai_shutdown(fe, stream); 2557 2558 /* run the stream event for each BE */ 2559 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2560 2561 return soc_pcm_ret(fe, err); 2562 } 2563 2564 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2565 { 2566 struct snd_soc_dpcm *dpcm; 2567 int ret = 0; 2568 2569 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2570 snd_pcm_direction_name(stream), fe->dai_link->name); 2571 2572 /* Only start the BE if the FE is ready */ 2573 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2574 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2575 dev_err(fe->dev, "ASoC: FE %s is not ready %s\n", 2576 fe->dai_link->name, dpcm_state_string(fe->dpcm[stream].state)); 2577 ret = -EINVAL; 2578 goto disconnect; 2579 } 2580 2581 /* startup must always be called for new BEs */ 2582 ret = dpcm_be_dai_startup(fe, stream); 2583 if (ret < 0) 2584 goto disconnect; 2585 2586 /* keep going if FE state is > open */ 2587 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2588 return 0; 2589 2590 ret = dpcm_be_dai_hw_params(fe, stream); 2591 if (ret < 0) 2592 goto close; 2593 2594 /* keep going if FE state is > hw_params */ 2595 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2596 return 0; 2597 2598 ret = dpcm_be_dai_prepare(fe, stream); 2599 if (ret < 0) 2600 goto hw_free; 2601 2602 /* run the stream event for each BE */ 2603 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2604 2605 /* keep going if FE state is > prepare */ 2606 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2607 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2608 return 0; 2609 2610 ret = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_START); 2611 if (ret < 0) 2612 goto hw_free; 2613 2614 return 0; 2615 2616 hw_free: 2617 dpcm_be_dai_hw_free(fe, stream); 2618 close: 2619 dpcm_be_dai_shutdown(fe, stream); 2620 disconnect: 2621 /* disconnect any pending BEs */ 2622 for_each_dpcm_be(fe, stream, dpcm) { 2623 struct snd_soc_pcm_runtime *be = dpcm->be; 2624 2625 /* is this op for this BE ? */ 2626 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2627 continue; 2628 2629 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2630 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2631 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2632 } 2633 2634 return soc_pcm_ret(fe, ret); 2635 } 2636 2637 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2638 { 2639 struct snd_soc_dapm_widget_list *list; 2640 int stream; 2641 int count, paths; 2642 2643 if (!fe->dai_link->dynamic) 2644 return 0; 2645 2646 if (fe->dai_link->num_cpus > 1) 2647 return snd_soc_ret(fe->dev, -EINVAL, 2648 "%s doesn't support Multi CPU yet\n", __func__); 2649 2650 /* only check active links */ 2651 if (!snd_soc_dai_active(snd_soc_rtd_to_cpu(fe, 0))) 2652 return 0; 2653 2654 /* DAPM sync will call this to update DSP paths */ 2655 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2656 new ? "new" : "old", fe->dai_link->name); 2657 2658 for_each_pcm_streams(stream) { 2659 2660 /* skip if FE doesn't have playback/capture capability */ 2661 if (!snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream) || 2662 !snd_soc_dai_stream_valid(snd_soc_rtd_to_codec(fe, 0), stream)) 2663 continue; 2664 2665 /* skip if FE isn't currently playing/capturing */ 2666 if (!snd_soc_dai_stream_active(snd_soc_rtd_to_cpu(fe, 0), stream) || 2667 !snd_soc_dai_stream_active(snd_soc_rtd_to_codec(fe, 0), stream)) 2668 continue; 2669 2670 paths = dpcm_path_get(fe, stream, &list); 2671 if (paths < 0) 2672 return paths; 2673 2674 /* update any playback/capture paths */ 2675 /* 2676 * Find the corresponding BE DAIs that source or sink audio to this 2677 * FE substream. 2678 */ 2679 if (new) 2680 count = dpcm_add_paths(fe, stream, &list); 2681 else 2682 count = dpcm_prune_paths(fe, stream, &list); 2683 if (count) { 2684 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2685 if (new) 2686 dpcm_run_update_startup(fe, stream); 2687 else 2688 dpcm_run_update_shutdown(fe, stream); 2689 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2690 2691 dpcm_clear_pending_state(fe, stream); 2692 dpcm_be_disconnect(fe, stream); 2693 } 2694 2695 dpcm_path_put(&list); 2696 } 2697 2698 return 0; 2699 } 2700 2701 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2702 * any DAI links. 2703 */ 2704 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2705 { 2706 struct snd_soc_pcm_runtime *fe; 2707 int ret = 0; 2708 2709 snd_soc_dpcm_mutex_lock(card); 2710 /* shutdown all old paths first */ 2711 for_each_card_rtds(card, fe) { 2712 ret = soc_dpcm_fe_runtime_update(fe, 0); 2713 if (ret) 2714 goto out; 2715 } 2716 2717 /* bring new paths up */ 2718 for_each_card_rtds(card, fe) { 2719 ret = soc_dpcm_fe_runtime_update(fe, 1); 2720 if (ret) 2721 goto out; 2722 } 2723 2724 out: 2725 snd_soc_dpcm_mutex_unlock(card); 2726 2727 return snd_soc_ret(card->dev, ret, "%s() failed\n", __func__); 2728 } 2729 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2730 2731 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2732 { 2733 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2734 struct snd_soc_dpcm *dpcm; 2735 int stream = fe_substream->stream; 2736 2737 snd_soc_dpcm_mutex_assert_held(fe); 2738 2739 /* mark FE's links ready to prune */ 2740 for_each_dpcm_be(fe, stream, dpcm) 2741 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2742 2743 dpcm_be_disconnect(fe, stream); 2744 } 2745 2746 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2747 { 2748 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2749 int ret; 2750 2751 snd_soc_dpcm_mutex_lock(fe); 2752 ret = dpcm_fe_dai_shutdown(fe_substream); 2753 2754 dpcm_fe_dai_cleanup(fe_substream); 2755 2756 snd_soc_dpcm_mutex_unlock(fe); 2757 return ret; 2758 } 2759 2760 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2761 { 2762 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2763 struct snd_soc_dapm_widget_list *list; 2764 int ret; 2765 int stream = fe_substream->stream; 2766 2767 snd_soc_dpcm_mutex_lock(fe); 2768 2769 ret = dpcm_path_get(fe, stream, &list); 2770 if (ret < 0) 2771 goto open_end; 2772 2773 /* calculate valid and active FE <-> BE dpcms */ 2774 dpcm_add_paths(fe, stream, &list); 2775 2776 /* There is no point starting up this FE if there are no BEs. */ 2777 if (list_empty(&fe->dpcm[stream].be_clients)) { 2778 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles. */ 2779 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n", 2780 fe->dai_link->name); 2781 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n", fe->dai_link->name); 2782 2783 ret = -EINVAL; 2784 goto put_path; 2785 } 2786 2787 ret = dpcm_fe_dai_startup(fe_substream); 2788 if (ret < 0) 2789 dpcm_fe_dai_cleanup(fe_substream); 2790 2791 dpcm_clear_pending_state(fe, stream); 2792 put_path: 2793 dpcm_path_put(&list); 2794 open_end: 2795 snd_soc_dpcm_mutex_unlock(fe); 2796 return ret; 2797 } 2798 2799 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2800 int *playback, int *capture) 2801 { 2802 struct snd_soc_dai_link *dai_link = rtd->dai_link; 2803 struct snd_soc_dai *cpu_dai; 2804 struct snd_soc_dai *codec_dai; 2805 struct snd_soc_dai_link_ch_map *ch_maps; 2806 struct snd_soc_dai *dummy_dai = snd_soc_find_dai(&snd_soc_dummy_dlc); 2807 int cpu_capture; 2808 int cpu_playback; 2809 int has_playback = 0; 2810 int has_capture = 0; 2811 int i; 2812 2813 if (dai_link->dynamic && dai_link->num_cpus > 1) 2814 return snd_soc_ret(rtd->dev, -EINVAL, 2815 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2816 2817 /* Adapt stream for codec2codec links */ 2818 cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE); 2819 cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK); 2820 2821 /* 2822 * see 2823 * soc.h :: [dai_link->ch_maps Image sample] 2824 */ 2825 for_each_rtd_ch_maps(rtd, i, ch_maps) { 2826 cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu); 2827 codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec); 2828 2829 /* 2830 * FIXME 2831 * 2832 * DPCM Codec has been no checked before. 2833 * It should be checked, but it breaks compatibility. 2834 * 2835 * For example there is a case that CPU have loopback capabilities which is used 2836 * for tests on boards where the Codec has no capture capabilities. In this case, 2837 * Codec capture validation check will be fail, but system should allow capture 2838 * capabilities. We have no solution for it today. 2839 */ 2840 if (dai_link->dynamic || dai_link->no_pcm) 2841 codec_dai = dummy_dai; 2842 2843 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2844 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2845 has_playback = 1; 2846 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2847 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2848 has_capture = 1; 2849 } 2850 2851 if (dai_link->playback_only) 2852 has_capture = 0; 2853 2854 if (dai_link->capture_only) 2855 has_playback = 0; 2856 2857 if (!has_playback && !has_capture) 2858 return snd_soc_ret(rtd->dev, -EINVAL, 2859 "substream %s has no playback, no capture\n", dai_link->stream_name); 2860 2861 *playback = has_playback; 2862 *capture = has_capture; 2863 2864 return 0; 2865 } 2866 2867 static int soc_create_pcm(struct snd_pcm **pcm, 2868 struct snd_soc_pcm_runtime *rtd, 2869 int playback, int capture) 2870 { 2871 char new_name[64]; 2872 int ret; 2873 2874 /* create the PCM */ 2875 if (rtd->dai_link->c2c_params) { 2876 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2877 rtd->dai_link->stream_name); 2878 2879 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id, 2880 playback, capture, pcm); 2881 } else if (rtd->dai_link->no_pcm) { 2882 snprintf(new_name, sizeof(new_name), "(%s)", 2883 rtd->dai_link->stream_name); 2884 2885 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id, 2886 playback, capture, pcm); 2887 } else { 2888 if (rtd->dai_link->dynamic) 2889 snprintf(new_name, sizeof(new_name), "%s (*)", 2890 rtd->dai_link->stream_name); 2891 else 2892 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2893 rtd->dai_link->stream_name, 2894 soc_codec_dai_name(rtd), rtd->id); 2895 2896 ret = snd_pcm_new(rtd->card->snd_card, new_name, rtd->id, playback, 2897 capture, pcm); 2898 } 2899 if (ret < 0) 2900 return snd_soc_ret(rtd->dev, ret, 2901 "can't create pcm %s for dailink %s\n", new_name, rtd->dai_link->name); 2902 2903 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n", rtd->id, new_name); 2904 2905 return 0; 2906 } 2907 2908 /* create a new pcm */ 2909 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd) 2910 { 2911 struct snd_soc_component *component; 2912 struct snd_pcm *pcm; 2913 int ret = 0, playback = 0, capture = 0; 2914 int i; 2915 2916 ret = soc_get_playback_capture(rtd, &playback, &capture); 2917 if (ret < 0) 2918 return ret; 2919 2920 ret = soc_create_pcm(&pcm, rtd, playback, capture); 2921 if (ret < 0) 2922 return ret; 2923 2924 /* DAPM dai link stream work */ 2925 /* 2926 * Currently nothing to do for c2c links 2927 * Since c2c links are internal nodes in the DAPM graph and 2928 * don't interface with the outside world or application layer 2929 * we don't have to do any special handling on close. 2930 */ 2931 if (!rtd->dai_link->c2c_params) 2932 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2933 2934 rtd->pcm = pcm; 2935 pcm->nonatomic = rtd->dai_link->nonatomic; 2936 pcm->private_data = rtd; 2937 pcm->no_device_suspend = true; 2938 2939 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { 2940 if (playback) 2941 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2942 if (capture) 2943 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2944 goto out; 2945 } 2946 2947 /* ASoC PCM operations */ 2948 if (rtd->dai_link->dynamic) { 2949 rtd->ops.open = dpcm_fe_dai_open; 2950 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2951 rtd->ops.prepare = dpcm_fe_dai_prepare; 2952 rtd->ops.trigger = dpcm_fe_dai_trigger; 2953 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2954 rtd->ops.close = dpcm_fe_dai_close; 2955 rtd->ops.pointer = soc_pcm_pointer; 2956 } else { 2957 rtd->ops.open = soc_pcm_open; 2958 rtd->ops.hw_params = soc_pcm_hw_params; 2959 rtd->ops.prepare = soc_pcm_prepare; 2960 rtd->ops.trigger = soc_pcm_trigger; 2961 rtd->ops.hw_free = soc_pcm_hw_free; 2962 rtd->ops.close = soc_pcm_close; 2963 rtd->ops.pointer = soc_pcm_pointer; 2964 } 2965 2966 for_each_rtd_components(rtd, i, component) { 2967 const struct snd_soc_component_driver *drv = component->driver; 2968 2969 if (drv->ioctl) 2970 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2971 if (drv->sync_stop) 2972 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2973 if (drv->copy) 2974 rtd->ops.copy = snd_soc_pcm_component_copy; 2975 if (drv->page) 2976 rtd->ops.page = snd_soc_pcm_component_page; 2977 if (drv->mmap) 2978 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2979 if (drv->ack) 2980 rtd->ops.ack = snd_soc_pcm_component_ack; 2981 } 2982 2983 if (playback) 2984 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2985 2986 if (capture) 2987 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2988 2989 ret = snd_soc_pcm_component_new(rtd); 2990 if (ret < 0) 2991 return ret; 2992 out: 2993 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2994 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2995 return ret; 2996 } 2997 2998 /* get the substream for this BE */ 2999 struct snd_pcm_substream * 3000 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3001 { 3002 return be->pcm->streams[stream].substream; 3003 } 3004 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3005