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/clk.h> 16 #include <linux/delay.h> 17 #include <linux/pinctrl/consumer.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 31 DEFINE_GUARD(snd_soc_card_mutex, struct snd_soc_card *, 32 snd_soc_card_mutex_lock(_T), snd_soc_card_mutex_unlock(_T)) 33 #define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret) 34 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd, 35 const char *func, int ret) 36 { 37 return snd_soc_ret(rtd->dev, ret, 38 "at %s() on %s\n", func, rtd->dai_link->name); 39 } 40 41 /* is the current PCM operation for this FE ? */ 42 #if 0 43 static int snd_soc_dpcm_can_fe_update(struct snd_soc_pcm_runtime *fe, int stream) 44 { 45 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 46 return 1; 47 return 0; 48 } 49 #endif 50 51 /* is the current PCM operation for this BE ? */ 52 static int snd_soc_dpcm_can_be_update(struct snd_soc_pcm_runtime *fe, 53 struct snd_soc_pcm_runtime *be, int stream) 54 { 55 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 56 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 57 be->dpcm[stream].runtime_update)) 58 return 1; 59 return 0; 60 } 61 62 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 63 struct snd_soc_pcm_runtime *be, 64 int stream, 65 const enum snd_soc_dpcm_state *states, 66 int num_states) 67 { 68 struct snd_soc_dpcm *dpcm; 69 int state; 70 int ret = 1; 71 int i; 72 73 for_each_dpcm_fe(be, stream, dpcm) { 74 75 if (dpcm->fe == fe) 76 continue; 77 78 state = dpcm->fe->dpcm[stream].state; 79 for (i = 0; i < num_states; i++) { 80 if (state == states[i]) { 81 ret = 0; 82 break; 83 } 84 } 85 } 86 87 /* it's safe to do this BE DAI */ 88 return ret; 89 } 90 91 /* 92 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 93 * are not running, paused or suspended for the specified stream direction. 94 */ 95 static int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 96 struct snd_soc_pcm_runtime *be, int stream) 97 { 98 const enum snd_soc_dpcm_state state[] = { 99 SND_SOC_DPCM_STATE_START, 100 SND_SOC_DPCM_STATE_PAUSED, 101 SND_SOC_DPCM_STATE_SUSPEND, 102 }; 103 104 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 105 } 106 107 /* 108 * We can only change hw params a BE DAI if any of it's FE are not prepared, 109 * running, paused or suspended for the specified stream direction. 110 */ 111 static int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 112 struct snd_soc_pcm_runtime *be, int stream) 113 { 114 const enum snd_soc_dpcm_state state[] = { 115 SND_SOC_DPCM_STATE_START, 116 SND_SOC_DPCM_STATE_PAUSED, 117 SND_SOC_DPCM_STATE_SUSPEND, 118 SND_SOC_DPCM_STATE_PREPARE, 119 }; 120 121 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 122 } 123 124 /* 125 * We can only prepare a BE DAI if any of it's FE are not prepared, 126 * running or paused for the specified stream direction. 127 */ 128 static int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe, 129 struct snd_soc_pcm_runtime *be, int stream) 130 { 131 const enum snd_soc_dpcm_state state[] = { 132 SND_SOC_DPCM_STATE_START, 133 SND_SOC_DPCM_STATE_PAUSED, 134 SND_SOC_DPCM_STATE_PREPARE, 135 }; 136 137 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 138 } 139 140 #define DPCM_MAX_BE_USERS 8 141 142 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 143 { 144 return (rtd)->dai_link->num_cpus == 1 ? snd_soc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 145 } 146 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 147 { 148 return (rtd)->dai_link->num_codecs == 1 ? snd_soc_rtd_to_codec(rtd, 0)->name : "multicodec"; 149 } 150 151 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 152 { 153 switch (state) { 154 case SND_SOC_DPCM_STATE_NEW: 155 return "new"; 156 case SND_SOC_DPCM_STATE_OPEN: 157 return "open"; 158 case SND_SOC_DPCM_STATE_HW_PARAMS: 159 return "hw_params"; 160 case SND_SOC_DPCM_STATE_PREPARE: 161 return "prepare"; 162 case SND_SOC_DPCM_STATE_START: 163 return "start"; 164 case SND_SOC_DPCM_STATE_STOP: 165 return "stop"; 166 case SND_SOC_DPCM_STATE_SUSPEND: 167 return "suspend"; 168 case SND_SOC_DPCM_STATE_PAUSED: 169 return "paused"; 170 case SND_SOC_DPCM_STATE_HW_FREE: 171 return "hw_free"; 172 case SND_SOC_DPCM_STATE_CLOSE: 173 return "close"; 174 } 175 176 return "unknown"; 177 } 178 179 #ifdef CONFIG_DEBUG_FS 180 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 181 int stream, char *buf, size_t size) 182 { 183 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 184 struct snd_soc_dpcm *dpcm; 185 ssize_t offset = 0; 186 187 /* FE state */ 188 offset += scnprintf(buf + offset, size - offset, 189 "[%s - %s]\n", fe->dai_link->name, 190 stream ? "Capture" : "Playback"); 191 192 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 193 dpcm_state_string(fe->dpcm[stream].state)); 194 195 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 196 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 197 offset += scnprintf(buf + offset, size - offset, 198 "Hardware Params: " 199 "Format = %s, Channels = %d, Rate = %d\n", 200 snd_pcm_format_name(params_format(params)), 201 params_channels(params), 202 params_rate(params)); 203 204 /* BEs state */ 205 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 206 207 if (list_empty(&fe->dpcm[stream].be_clients)) { 208 offset += scnprintf(buf + offset, size - offset, 209 " No active DSP links\n"); 210 goto out; 211 } 212 213 for_each_dpcm_be(fe, stream, dpcm) { 214 struct snd_soc_pcm_runtime *be = dpcm->be; 215 params = &be->dpcm[stream].hw_params; 216 217 offset += scnprintf(buf + offset, size - offset, 218 "- %s\n", be->dai_link->name); 219 220 offset += scnprintf(buf + offset, size - offset, 221 " State: %s\n", 222 dpcm_state_string(be->dpcm[stream].state)); 223 224 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 225 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 226 offset += scnprintf(buf + offset, size - offset, 227 " Hardware Params: " 228 "Format = %s, Channels = %d, Rate = %d\n", 229 snd_pcm_format_name(params_format(params)), 230 params_channels(params), 231 params_rate(params)); 232 } 233 out: 234 return offset; 235 } 236 237 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 238 size_t count, loff_t *ppos) 239 { 240 struct snd_soc_pcm_runtime *fe = file->private_data; 241 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 242 int stream; 243 char *buf; 244 245 if (fe->dai_link->num_cpus > 1) 246 return snd_soc_ret(fe->dev, -EINVAL, 247 "%s doesn't support Multi CPU yet\n", __func__); 248 249 buf = kmalloc(out_count, GFP_KERNEL); 250 if (!buf) 251 return -ENOMEM; 252 253 snd_soc_dpcm_mutex_lock(fe); 254 for_each_pcm_streams(stream) 255 if (snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream)) 256 offset += dpcm_show_state(fe, stream, 257 buf + offset, 258 out_count - offset); 259 snd_soc_dpcm_mutex_unlock(fe); 260 261 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 262 263 kfree(buf); 264 return ret; 265 } 266 267 static const struct file_operations dpcm_state_fops = { 268 .open = simple_open, 269 .read = dpcm_state_read_file, 270 .llseek = default_llseek, 271 }; 272 273 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 274 { 275 if (!rtd->dai_link->dynamic) 276 return; 277 278 if (!rtd->card->debugfs_card_root) 279 return; 280 281 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 282 rtd->card->debugfs_card_root); 283 284 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 285 rtd, &dpcm_state_fops); 286 } 287 288 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 289 { 290 char *name; 291 292 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 293 snd_pcm_direction_name(stream)); 294 if (name) { 295 dpcm->debugfs_state = debugfs_create_dir( 296 name, dpcm->fe->debugfs_dpcm_root); 297 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 298 &dpcm->state); 299 kfree(name); 300 } 301 } 302 303 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 304 { 305 debugfs_remove_recursive(dpcm->debugfs_state); 306 } 307 308 #else 309 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 310 int stream) 311 { 312 } 313 314 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 315 { 316 } 317 #endif 318 319 /* Set FE's runtime_update state; the state is protected via PCM stream lock 320 * for avoiding the race with trigger callback. 321 * If the state is unset and a trigger is pending while the previous operation, 322 * process the pending trigger action here. 323 */ 324 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 325 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 326 int stream, enum snd_soc_dpcm_update state) 327 { 328 struct snd_pcm_substream *substream = 329 snd_soc_dpcm_get_substream(fe, stream); 330 331 snd_pcm_stream_lock_irq(substream); 332 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 333 dpcm_fe_dai_do_trigger(substream, 334 fe->dpcm[stream].trigger_pending - 1); 335 fe->dpcm[stream].trigger_pending = 0; 336 } 337 fe->dpcm[stream].runtime_update = state; 338 snd_pcm_stream_unlock_irq(substream); 339 } 340 341 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 342 int stream, enum snd_soc_dpcm_update state) 343 { 344 be->dpcm[stream].runtime_update = state; 345 } 346 347 /** 348 * snd_soc_runtime_action() - Increment/Decrement active count for 349 * PCM runtime components 350 * @rtd: ASoC PCM runtime that is activated 351 * @stream: Direction of the PCM stream 352 * @action: Activate stream if 1. Deactivate if -1. 353 * 354 * Increments/Decrements the active count for all the DAIs and components 355 * attached to a PCM runtime. 356 * Should typically be called when a stream is opened. 357 * 358 * Must be called with the rtd->card->pcm_mutex being held 359 */ 360 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 361 int stream, int action) 362 { 363 struct snd_soc_component *component; 364 struct snd_soc_dai *dai; 365 int i; 366 367 snd_soc_dpcm_mutex_assert_held(rtd); 368 369 for_each_rtd_dais(rtd, i, dai) 370 snd_soc_dai_action(dai, stream, action); 371 372 /* Increments/Decrements the active count for components without DAIs */ 373 for_each_rtd_components(rtd, i, component) { 374 if (component->num_dai) 375 continue; 376 component->active += action; 377 } 378 } 379 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 380 381 /** 382 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 383 * @rtd: The ASoC PCM runtime that should be checked. 384 * 385 * This function checks whether the power down delay should be ignored for a 386 * specific PCM runtime. Returns true if the delay is 0, if the DAI link has 387 * been configured to ignore the delay, or if none of the components benefits 388 * from having the delay. 389 */ 390 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 391 { 392 struct snd_soc_component *component; 393 int i; 394 395 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 396 return true; 397 398 for_each_rtd_components(rtd, i, component) 399 if (component->driver->use_pmdown_time) 400 /* No need to go through all components */ 401 return false; 402 403 return true; 404 } 405 406 /* DPCM stream event, send event to FE and all active BEs. */ 407 void dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, int event) 408 { 409 struct snd_soc_dpcm *dpcm; 410 411 snd_soc_dpcm_mutex_assert_held(fe); 412 413 for_each_dpcm_be(fe, dir, dpcm) { 414 415 struct snd_soc_pcm_runtime *be = dpcm->be; 416 417 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 418 be->dai_link->name, event, dir); 419 420 if ((event == SND_SOC_DAPM_STREAM_STOP) && 421 (be->dpcm[dir].users >= 1)) 422 continue; 423 424 snd_soc_dapm_stream_event(be, dir, event); 425 } 426 427 snd_soc_dapm_stream_event(fe, dir, event); 428 } 429 430 void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 431 struct snd_pcm_hw_params *params) 432 { 433 if (params) { 434 dai->symmetric_rate = params_rate(params); 435 dai->symmetric_channels = params_channels(params); 436 dai->symmetric_sample_bits = snd_pcm_format_physical_width(params_format(params)); 437 } else { 438 dai->symmetric_rate = 0; 439 dai->symmetric_channels = 0; 440 dai->symmetric_sample_bits = 0; 441 } 442 } 443 444 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 445 struct snd_soc_dai *soc_dai) 446 { 447 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 448 int ret; 449 450 if (!snd_soc_dai_active(soc_dai)) 451 return 0; 452 453 #define __soc_pcm_apply_symmetry(name, NAME) \ 454 if (soc_dai->symmetric_##name && \ 455 (soc_dai->driver->symmetric_##name || rtd->dai_link->symmetric_##name)) { \ 456 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 457 #name, soc_dai->symmetric_##name); \ 458 \ 459 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 460 SNDRV_PCM_HW_PARAM_##NAME,\ 461 soc_dai->symmetric_##name); \ 462 if (ret < 0) \ 463 return snd_soc_ret(soc_dai->dev, ret, \ 464 "Unable to apply %s constraint\n", #name); \ 465 } 466 467 __soc_pcm_apply_symmetry(rate, RATE); 468 __soc_pcm_apply_symmetry(channels, CHANNELS); 469 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 470 471 return 0; 472 } 473 474 /* 475 * Shared BCLK constraint: when multiple DAIs share the same physical BCLK, 476 * constrain hw_params so that the BCLK rate (rate * channels * sample_bits, 477 * or rate * slots * slot_width for TDM) remains consistent. 478 */ 479 480 static int soc_pcm_shared_bclk_rule_rate(struct snd_pcm_hw_params *params, 481 struct snd_pcm_hw_rule *rule) 482 { 483 struct snd_soc_dai *dai = rule->private; 484 struct snd_soc_card *card = dai->component->card; 485 struct snd_soc_pcm_runtime *rtd; 486 struct snd_soc_dai *other_dai; 487 unsigned long active_bclk_rate = 0; 488 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 489 struct snd_interval constraint = { .empty = 1 }; 490 unsigned int target_rate; 491 int i; 492 493 /* Protect the rtd list traversal with the ASoC card mutex helper. */ 494 guard(snd_soc_card_mutex)(card); 495 496 /* Scan all DAIs on the card for an active peer sharing the same BCLK */ 497 for_each_card_rtds(card, rtd) { 498 for_each_rtd_cpu_dais(rtd, i, other_dai) { 499 if (other_dai == dai) 500 continue; 501 if (!other_dai->bclk) 502 continue; 503 if (!snd_soc_dai_active(other_dai)) 504 continue; 505 /* 506 * Skip peers whose hw_params hasn't run yet. 507 * symmetric_rate is set by soc_pcm_set_dai_params() 508 * after snd_soc_dai_hw_params(), so non-zero means 509 * the DAI's clk_set_rate() has already executed. 510 */ 511 if (!other_dai->symmetric_rate) 512 continue; 513 if (!clk_is_match(dai->bclk, other_dai->bclk)) 514 continue; 515 516 active_bclk_rate = clk_get_rate(other_dai->bclk); 517 if (active_bclk_rate) 518 goto found; 519 } 520 } 521 522 return 0; 523 524 found: 525 if (dai->bclk_ratio) { 526 /* 527 * Driver has set an explicit BCLK ratio (e.g. for TDM where 528 * BCLK = rate * slots * slot_width). The only valid rate is 529 * active_bclk_rate / bclk_ratio. 530 */ 531 target_rate = active_bclk_rate / dai->bclk_ratio; 532 533 constraint.min = target_rate; 534 constraint.max = target_rate; 535 } else { 536 struct snd_interval *channels = hw_param_interval(params, 537 SNDRV_PCM_HW_PARAM_CHANNELS); 538 struct snd_interval *sample_bits = hw_param_interval(params, 539 SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 540 541 /* 542 * Default: BCLK = rate * channels * sample_bits. 543 * Calculate the range of valid rates given the current 544 * channel and sample_bits intervals. 545 */ 546 if (!channels->min || !sample_bits->min) 547 return 0; 548 549 constraint.max = active_bclk_rate / 550 ((unsigned long)channels->min * sample_bits->min); 551 552 if (channels->max && sample_bits->max) 553 constraint.min = active_bclk_rate / 554 ((unsigned long)channels->max * sample_bits->max); 555 else 556 constraint.min = constraint.max; 557 } 558 559 constraint.integer = 1; 560 constraint.empty = 0; 561 562 return snd_interval_refine(rate, &constraint); 563 } 564 565 static int soc_pcm_apply_shared_bclk(struct snd_pcm_substream *substream, 566 struct snd_soc_dai *dai) 567 { 568 if (!dai->bclk) 569 return 0; 570 571 dev_dbg(dai->dev, 572 "ASoC: registering shared BCLK rate constraint\n"); 573 574 return snd_pcm_hw_rule_add(substream->runtime, 0, 575 SNDRV_PCM_HW_PARAM_RATE, 576 soc_pcm_shared_bclk_rule_rate, dai, 577 SNDRV_PCM_HW_PARAM_CHANNELS, 578 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 579 -1); 580 } 581 582 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 583 struct snd_pcm_hw_params *params) 584 { 585 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 586 struct snd_soc_dai d; 587 struct snd_soc_dai *dai; 588 struct snd_soc_dai *cpu_dai; 589 unsigned int symmetry, i; 590 591 d.name = __func__; 592 soc_pcm_set_dai_params(&d, params); 593 594 #define __soc_pcm_params_symmetry(xxx) \ 595 symmetry = rtd->dai_link->symmetric_##xxx; \ 596 for_each_rtd_dais(rtd, i, dai) \ 597 symmetry |= dai->driver->symmetric_##xxx; \ 598 \ 599 if (symmetry) \ 600 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 601 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 602 cpu_dai->symmetric_##xxx && \ 603 cpu_dai->symmetric_##xxx != d.symmetric_##xxx) \ 604 return snd_soc_ret(rtd->dev, -EINVAL, \ 605 "unmatched %s symmetry: %s:%d - %s:%d\n", \ 606 #xxx, cpu_dai->name, cpu_dai->symmetric_##xxx, \ 607 d.name, d.symmetric_##xxx); 608 609 /* reject unmatched parameters when applying symmetry */ 610 __soc_pcm_params_symmetry(rate); 611 __soc_pcm_params_symmetry(channels); 612 __soc_pcm_params_symmetry(sample_bits); 613 614 return 0; 615 } 616 617 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 618 { 619 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 620 struct snd_soc_dai_link *link = rtd->dai_link; 621 struct snd_soc_dai *dai; 622 unsigned int symmetry, i; 623 624 symmetry = link->symmetric_rate || 625 link->symmetric_channels || 626 link->symmetric_sample_bits; 627 628 for_each_rtd_dais(rtd, i, dai) 629 symmetry = symmetry || 630 dai->driver->symmetric_rate || 631 dai->driver->symmetric_channels || 632 dai->driver->symmetric_sample_bits; 633 634 if (symmetry) 635 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 636 } 637 638 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 639 { 640 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 641 int ret; 642 643 if (!bits) 644 return; 645 646 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 647 if (ret != 0) 648 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 649 bits, ret); 650 } 651 652 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 653 { 654 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 655 struct snd_soc_dai *cpu_dai; 656 struct snd_soc_dai *codec_dai; 657 int stream = substream->stream; 658 int i; 659 unsigned int bits = 0, cpu_bits = 0; 660 661 for_each_rtd_codec_dais(rtd, i, codec_dai) { 662 const struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 663 664 if (pcm_codec->sig_bits == 0) { 665 bits = 0; 666 break; 667 } 668 bits = max(pcm_codec->sig_bits, bits); 669 } 670 671 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 672 const struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 673 674 if (pcm_cpu->sig_bits == 0) { 675 cpu_bits = 0; 676 break; 677 } 678 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 679 } 680 681 soc_pcm_set_msb(substream, bits); 682 soc_pcm_set_msb(substream, cpu_bits); 683 } 684 685 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw, bool force) 686 { 687 if (force) { 688 hw->rates = UINT_MAX; 689 hw->rate_min = 0; 690 hw->rate_max = UINT_MAX; 691 hw->channels_min = 0; 692 hw->channels_max = UINT_MAX; 693 hw->formats = ULLONG_MAX; 694 } else { 695 /* Preserve initialized parameters */ 696 if (!hw->rates) 697 hw->rates = UINT_MAX; 698 if (!hw->rate_max) 699 hw->rate_max = UINT_MAX; 700 if (!hw->channels_max) 701 hw->channels_max = UINT_MAX; 702 if (!hw->formats) 703 hw->formats = ULLONG_MAX; 704 } 705 } 706 707 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 708 const struct snd_soc_pcm_stream *p) 709 { 710 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 711 712 /* setup hw->rate_min/max via hw->rates first */ 713 snd_pcm_hw_limit_rates(hw); 714 715 /* update hw->rate_min/max by snd_soc_pcm_stream */ 716 hw->rate_min = max(hw->rate_min, p->rate_min); 717 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 718 } 719 720 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 721 const struct snd_soc_pcm_stream *p) 722 { 723 hw->channels_min = max(hw->channels_min, p->channels_min); 724 hw->channels_max = min(hw->channels_max, p->channels_max); 725 } 726 727 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 728 const struct snd_soc_pcm_stream *p) 729 { 730 hw->formats &= p->formats; 731 hw->subformats &= p->subformats; 732 } 733 734 /** 735 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 736 * @rtd: ASoC PCM runtime 737 * @hw: PCM hardware parameters (output) 738 * @stream: Direction of the PCM stream 739 * 740 * Calculates the subset of stream parameters supported by all DAIs 741 * associated with the PCM stream. 742 */ 743 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 744 struct snd_pcm_hardware *hw, int stream) 745 { 746 struct snd_soc_dai *codec_dai; 747 struct snd_soc_dai *cpu_dai; 748 const struct snd_soc_pcm_stream *codec_stream; 749 const struct snd_soc_pcm_stream *cpu_stream; 750 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 751 int i; 752 753 soc_pcm_hw_init(hw, true); 754 755 /* first calculate min/max only for CPUs in the DAI link */ 756 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 757 758 /* 759 * Skip CPUs which don't support the current stream type. 760 * Otherwise, since the rate, channel, and format values will 761 * zero in that case, we would have no usable settings left, 762 * causing the resulting setup to fail. 763 */ 764 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 765 continue; 766 767 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 768 769 soc_pcm_hw_update_chan(hw, cpu_stream); 770 soc_pcm_hw_update_rate(hw, cpu_stream); 771 soc_pcm_hw_update_format(hw, cpu_stream); 772 } 773 cpu_chan_min = hw->channels_min; 774 cpu_chan_max = hw->channels_max; 775 776 /* second calculate min/max only for CODECs in the DAI link */ 777 for_each_rtd_codec_dais(rtd, i, codec_dai) { 778 779 /* 780 * Skip CODECs which don't support the current stream type. 781 * Otherwise, since the rate, channel, and format values will 782 * zero in that case, we would have no usable settings left, 783 * causing the resulting setup to fail. 784 */ 785 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 786 continue; 787 788 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 789 790 soc_pcm_hw_update_chan(hw, codec_stream); 791 soc_pcm_hw_update_rate(hw, codec_stream); 792 soc_pcm_hw_update_format(hw, codec_stream); 793 } 794 795 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 796 if (!hw->channels_min) 797 return -EINVAL; 798 799 /* 800 * chan min/max cannot be enforced if there are multiple CODEC DAIs 801 * connected to CPU DAI(s), use CPU DAI's directly and let 802 * channel allocation be fixed up later 803 */ 804 if (rtd->dai_link->num_codecs > 1) { 805 hw->channels_min = cpu_chan_min; 806 hw->channels_max = cpu_chan_max; 807 } 808 809 return 0; 810 } 811 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 812 813 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 814 { 815 struct snd_pcm_hardware *hw = &substream->runtime->hw; 816 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 817 u64 formats = hw->formats; 818 819 /* 820 * At least one CPU and one CODEC should match. Otherwise, we should 821 * have bailed out on a higher level, since there would be no CPU or 822 * CODEC to support the transfer direction in that case. 823 */ 824 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 825 826 if (formats) 827 hw->formats &= formats; 828 } 829 830 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 831 { 832 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 833 struct snd_soc_component *component; 834 int i, ret = 0; 835 836 for_each_rtd_components(rtd, i, component) { 837 ret = snd_soc_component_module_get_when_open(component, substream); 838 if (ret < 0) 839 break; 840 841 ret = snd_soc_component_open(component, substream); 842 if (ret < 0) 843 break; 844 } 845 846 return ret; 847 } 848 849 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 850 int rollback) 851 { 852 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 853 struct snd_soc_component *component; 854 int i, ret = 0; 855 856 for_each_rtd_components(rtd, i, component) { 857 int r = snd_soc_component_close(component, substream, rollback); 858 if (r < 0) 859 ret = r; /* use last ret */ 860 861 snd_soc_component_module_put_when_close(component, substream, rollback); 862 } 863 864 return ret; 865 } 866 867 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 868 struct snd_pcm_substream *substream, int rollback) 869 { 870 struct snd_soc_component *component; 871 struct snd_soc_dai *dai; 872 int i; 873 874 snd_soc_dpcm_mutex_assert_held(rtd); 875 876 if (!rollback) { 877 snd_soc_runtime_deactivate(rtd, substream->stream); 878 879 /* Make sure DAI parameters cleared if the DAI becomes inactive */ 880 for_each_rtd_dais(rtd, i, dai) { 881 if (snd_soc_dai_active(dai) == 0) 882 soc_pcm_set_dai_params(dai, NULL); 883 } 884 } 885 886 for_each_rtd_dais_reverse(rtd, i, dai) 887 snd_soc_dai_shutdown(dai, substream, rollback); 888 889 snd_soc_link_shutdown(substream, rollback); 890 891 soc_pcm_components_close(substream, rollback); 892 893 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 894 895 for_each_rtd_components(rtd, i, component) 896 if (!snd_soc_component_active(component)) 897 pinctrl_pm_select_sleep_state(component->dev); 898 899 return 0; 900 } 901 902 /* 903 * Called by ALSA when a PCM substream is closed. Private data can be 904 * freed here. The cpu DAI, codec DAI, machine and components are also 905 * shutdown. 906 */ 907 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 908 struct snd_pcm_substream *substream) 909 { 910 return soc_pcm_clean(rtd, substream, 0); 911 } 912 913 /* PCM close ops for non-DPCM streams */ 914 static int soc_pcm_close(struct snd_pcm_substream *substream) 915 { 916 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 917 918 snd_soc_dpcm_mutex_lock(rtd); 919 __soc_pcm_close(rtd, substream); 920 snd_soc_dpcm_mutex_unlock(rtd); 921 return 0; 922 } 923 924 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 925 { 926 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 927 struct snd_pcm_hardware *hw = &substream->runtime->hw; 928 const char *name_cpu = soc_cpu_dai_name(rtd); 929 const char *name_codec = soc_codec_dai_name(rtd); 930 const char *err_msg; 931 struct device *dev = rtd->dev; 932 933 err_msg = "rates"; 934 if (!hw->rates) 935 goto config_err; 936 937 err_msg = "formats"; 938 if (!hw->formats) 939 goto config_err; 940 941 err_msg = "channels"; 942 if (!hw->channels_min || !hw->channels_max || 943 hw->channels_min > hw->channels_max) 944 goto config_err; 945 946 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 947 name_cpu); 948 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 949 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 950 hw->channels_max); 951 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 952 hw->rate_max); 953 954 return 0; 955 956 config_err: 957 return snd_soc_ret(dev, -EINVAL, 958 "%s <-> %s No matching %s\n", name_codec, name_cpu, err_msg); 959 } 960 961 /* 962 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 963 * then initialized and any private data can be allocated. This also calls 964 * startup for the cpu DAI, component, machine and codec DAI. 965 */ 966 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 967 struct snd_pcm_substream *substream) 968 { 969 struct snd_soc_component *component; 970 struct snd_soc_dai *dai; 971 int i, ret = 0; 972 973 snd_soc_dpcm_mutex_assert_held(rtd); 974 975 for_each_rtd_components(rtd, i, component) 976 pinctrl_pm_select_default_state(component->dev); 977 978 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 979 if (ret < 0) 980 goto err; 981 982 ret = soc_pcm_components_open(substream); 983 if (ret < 0) 984 goto err; 985 986 ret = snd_soc_link_startup(substream); 987 if (ret < 0) 988 goto err; 989 990 /* startup the audio subsystem */ 991 for_each_rtd_dais(rtd, i, dai) { 992 ret = snd_soc_dai_startup(dai, substream); 993 if (ret < 0) 994 goto err; 995 } 996 997 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 998 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 999 goto dynamic; 1000 1001 /* Check that the codec and cpu DAIs are compatible */ 1002 soc_pcm_init_runtime_hw(substream); 1003 1004 soc_pcm_update_symmetry(substream); 1005 1006 ret = soc_hw_sanity_check(substream); 1007 if (ret < 0) 1008 goto err; 1009 1010 soc_pcm_apply_msb(substream); 1011 1012 /* Symmetry only applies if we've already got an active stream. */ 1013 for_each_rtd_dais(rtd, i, dai) { 1014 ret = soc_pcm_apply_symmetry(substream, dai); 1015 if (ret != 0) 1016 goto err; 1017 } 1018 1019 /* Shared BCLK constraint across DAIs on the same card */ 1020 for_each_rtd_cpu_dais(rtd, i, dai) { 1021 ret = soc_pcm_apply_shared_bclk(substream, dai); 1022 if (ret != 0) 1023 goto err; 1024 } 1025 dynamic: 1026 snd_soc_runtime_activate(rtd, substream->stream); 1027 ret = 0; 1028 err: 1029 if (ret < 0) 1030 soc_pcm_clean(rtd, substream, 1); 1031 1032 return soc_pcm_ret(rtd, ret); 1033 } 1034 1035 /* PCM open ops for non-DPCM streams */ 1036 static int soc_pcm_open(struct snd_pcm_substream *substream) 1037 { 1038 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1039 int ret; 1040 1041 snd_soc_dpcm_mutex_lock(rtd); 1042 ret = __soc_pcm_open(rtd, substream); 1043 snd_soc_dpcm_mutex_unlock(rtd); 1044 return ret; 1045 } 1046 1047 /* 1048 * Called by ALSA when the PCM substream is prepared, can set format, sample 1049 * rate, etc. This function is non atomic and can be called multiple times, 1050 * it can refer to the runtime info. 1051 */ 1052 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 1053 struct snd_pcm_substream *substream) 1054 { 1055 struct snd_soc_dai *dai; 1056 int i, ret = 0; 1057 1058 snd_soc_dpcm_mutex_assert_held(rtd); 1059 1060 ret = snd_soc_link_prepare(substream); 1061 if (ret < 0) 1062 goto out; 1063 1064 ret = snd_soc_pcm_component_prepare(substream); 1065 if (ret < 0) 1066 goto out; 1067 1068 ret = snd_soc_pcm_dai_prepare(substream); 1069 if (ret < 0) 1070 goto out; 1071 1072 /* cancel any delayed stream shutdown that is pending */ 1073 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1074 rtd->pop_wait) { 1075 rtd->pop_wait = 0; 1076 cancel_delayed_work(&rtd->delayed_work); 1077 } 1078 1079 snd_soc_dapm_stream_event(rtd, substream->stream, 1080 SND_SOC_DAPM_STREAM_START); 1081 1082 for_each_rtd_dais(rtd, i, dai) { 1083 if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai)) 1084 snd_soc_dai_digital_mute(dai, 0, substream->stream); 1085 } 1086 1087 out: 1088 /* 1089 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 1090 * 1091 * We don't want to log an error since we do not want to give userspace a way to do a 1092 * denial-of-service attack on the syslog / diskspace. 1093 */ 1094 return ret; 1095 } 1096 1097 /* PCM prepare ops for non-DPCM streams */ 1098 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 1099 { 1100 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1101 int ret; 1102 1103 snd_soc_dpcm_mutex_lock(rtd); 1104 ret = __soc_pcm_prepare(rtd, substream); 1105 snd_soc_dpcm_mutex_unlock(rtd); 1106 1107 /* 1108 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 1109 * 1110 * We don't want to log an error since we do not want to give userspace a way to do a 1111 * denial-of-service attack on the syslog / diskspace. 1112 */ 1113 return ret; 1114 } 1115 1116 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 1117 unsigned int mask) 1118 { 1119 struct snd_interval *interval; 1120 int channels = hweight_long(mask); 1121 1122 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 1123 interval->min = channels; 1124 interval->max = channels; 1125 } 1126 1127 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 1128 struct snd_pcm_substream *substream, int rollback) 1129 { 1130 struct snd_soc_dai *dai; 1131 int i; 1132 1133 snd_soc_dpcm_mutex_assert_held(rtd); 1134 1135 /* clear the corresponding DAIs parameters when going to be inactive */ 1136 for_each_rtd_dais(rtd, i, dai) { 1137 if (snd_soc_dai_active(dai) == 1) 1138 soc_pcm_set_dai_params(dai, NULL); 1139 1140 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) { 1141 if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai)) 1142 snd_soc_dai_digital_mute(dai, 1, substream->stream); 1143 } 1144 } 1145 1146 /* run the stream event */ 1147 snd_soc_dapm_stream_stop(rtd, substream->stream); 1148 1149 /* free any machine hw params */ 1150 snd_soc_link_hw_free(substream, rollback); 1151 1152 /* free any component resources */ 1153 snd_soc_pcm_component_hw_free(substream, rollback); 1154 1155 /* now free hw params for the DAIs */ 1156 for_each_rtd_dais(rtd, i, dai) 1157 if (snd_soc_dai_stream_valid(dai, substream->stream)) 1158 snd_soc_dai_hw_free(dai, substream, rollback); 1159 1160 return 0; 1161 } 1162 1163 /* 1164 * Frees resources allocated by hw_params, can be called multiple times 1165 */ 1166 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 1167 struct snd_pcm_substream *substream) 1168 { 1169 return soc_pcm_hw_clean(rtd, substream, 0); 1170 } 1171 1172 /* hw_free PCM ops for non-DPCM streams */ 1173 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 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_free(rtd, substream); 1180 snd_soc_dpcm_mutex_unlock(rtd); 1181 return ret; 1182 } 1183 1184 /* 1185 * Called by ALSA when the hardware params are set by application. This 1186 * function can also be called multiple times and can allocate buffers 1187 * (using snd_pcm_lib_* ). It's non-atomic. 1188 */ 1189 static int __soc_pcm_hw_params(struct snd_pcm_substream *substream, 1190 struct snd_pcm_hw_params *params) 1191 { 1192 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1193 struct snd_soc_dai *cpu_dai; 1194 struct snd_soc_dai *codec_dai; 1195 struct snd_pcm_hw_params tmp_params; 1196 int i, ret = 0; 1197 1198 snd_soc_dpcm_mutex_assert_held(rtd); 1199 1200 ret = soc_pcm_params_symmetry(substream, params); 1201 if (ret) 1202 goto out; 1203 1204 ret = snd_soc_link_hw_params(substream, params); 1205 if (ret < 0) 1206 goto out; 1207 1208 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1209 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); 1210 1211 /* 1212 * Skip CODECs which don't support the current stream type, 1213 * the idea being that if a CODEC is not used for the currently 1214 * set up transfer direction, it should not need to be 1215 * configured, especially since the configuration used might 1216 * not even be supported by that CODEC. There may be cases 1217 * however where a CODEC needs to be set up although it is 1218 * actually not being used for the transfer, e.g. if a 1219 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1220 * for the DAI link including a playback-only CODEC. 1221 * If this becomes necessary, we will have to augment the 1222 * machine driver setup with information on how to act, so 1223 * we can do the right thing here. 1224 */ 1225 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1226 continue; 1227 1228 /* copy params for each codec */ 1229 tmp_params = *params; 1230 1231 /* fixup params based on TDM slot masks */ 1232 if (tdm_mask) 1233 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask); 1234 1235 ret = snd_soc_dai_hw_params(codec_dai, substream, 1236 &tmp_params); 1237 if(ret < 0) 1238 goto out; 1239 1240 soc_pcm_set_dai_params(codec_dai, &tmp_params); 1241 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai); 1242 } 1243 1244 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1245 struct snd_soc_dai_link_ch_map *ch_maps; 1246 unsigned int ch_mask = 0; 1247 int j; 1248 1249 /* 1250 * Skip CPUs which don't support the current stream 1251 * type. See soc_pcm_init_runtime_hw() for more details 1252 */ 1253 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1254 continue; 1255 1256 /* copy params for each cpu */ 1257 tmp_params = *params; 1258 1259 /* 1260 * construct cpu channel mask by combining ch_mask of each 1261 * codec which maps to the cpu. 1262 * see 1263 * soc.h :: [dai_link->ch_maps Image sample] 1264 */ 1265 for_each_rtd_ch_maps(rtd, j, ch_maps) 1266 if (ch_maps->cpu == i) 1267 ch_mask |= ch_maps->ch_mask; 1268 1269 /* fixup cpu channel number */ 1270 if (ch_mask) 1271 soc_pcm_codec_params_fixup(&tmp_params, ch_mask); 1272 1273 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params); 1274 if (ret < 0) 1275 goto out; 1276 1277 /* store the parameters for each DAI */ 1278 soc_pcm_set_dai_params(cpu_dai, &tmp_params); 1279 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai); 1280 } 1281 1282 ret = snd_soc_pcm_component_hw_params(substream, params); 1283 out: 1284 if (ret < 0) 1285 soc_pcm_hw_clean(rtd, substream, 1); 1286 1287 return soc_pcm_ret(rtd, ret); 1288 } 1289 1290 /* hw_params PCM ops for non-DPCM streams */ 1291 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1292 struct snd_pcm_hw_params *params) 1293 { 1294 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1295 int ret; 1296 1297 snd_soc_dpcm_mutex_lock(rtd); 1298 ret = __soc_pcm_hw_params(substream, params); 1299 snd_soc_dpcm_mutex_unlock(rtd); 1300 return ret; 1301 } 1302 1303 #define TRIGGER_MAX 3 1304 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = { 1305 [SND_SOC_TRIGGER_ORDER_DEFAULT] = { 1306 snd_soc_link_trigger, 1307 snd_soc_pcm_component_trigger, 1308 snd_soc_pcm_dai_trigger, 1309 }, 1310 [SND_SOC_TRIGGER_ORDER_LDC] = { 1311 snd_soc_link_trigger, 1312 snd_soc_pcm_dai_trigger, 1313 snd_soc_pcm_component_trigger, 1314 }, 1315 }; 1316 1317 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1318 { 1319 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1320 struct snd_soc_component *component; 1321 int ret = 0, r = 0, i; 1322 int rollback = 0; 1323 int start = 0, stop = 0; 1324 1325 /* 1326 * select START/STOP sequence 1327 */ 1328 for_each_rtd_components(rtd, i, component) { 1329 if (component->driver->trigger_start) 1330 start = component->driver->trigger_start; 1331 if (component->driver->trigger_stop) 1332 stop = component->driver->trigger_stop; 1333 } 1334 if (rtd->dai_link->trigger_start) 1335 start = rtd->dai_link->trigger_start; 1336 if (rtd->dai_link->trigger_stop) 1337 stop = rtd->dai_link->trigger_stop; 1338 1339 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX || 1340 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX) 1341 return -EINVAL; 1342 1343 /* 1344 * START 1345 */ 1346 switch (cmd) { 1347 case SNDRV_PCM_TRIGGER_START: 1348 case SNDRV_PCM_TRIGGER_RESUME: 1349 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1350 for (i = 0; i < TRIGGER_MAX; i++) { 1351 r = trigger[start][i](substream, cmd, 0); 1352 if (r < 0) 1353 break; 1354 } 1355 } 1356 1357 /* 1358 * Rollback if START failed 1359 * find correspond STOP command 1360 */ 1361 if (r < 0) { 1362 rollback = 1; 1363 ret = r; 1364 switch (cmd) { 1365 case SNDRV_PCM_TRIGGER_START: 1366 cmd = SNDRV_PCM_TRIGGER_STOP; 1367 break; 1368 case SNDRV_PCM_TRIGGER_RESUME: 1369 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1370 break; 1371 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1372 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1373 break; 1374 } 1375 } 1376 1377 /* 1378 * STOP 1379 */ 1380 switch (cmd) { 1381 case SNDRV_PCM_TRIGGER_STOP: 1382 case SNDRV_PCM_TRIGGER_SUSPEND: 1383 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1384 for (i = TRIGGER_MAX; i > 0; i--) { 1385 r = trigger[stop][i - 1](substream, cmd, rollback); 1386 if (r < 0) 1387 ret = r; 1388 } 1389 } 1390 1391 return ret; 1392 } 1393 1394 /* 1395 * soc level wrapper for pointer callback 1396 * If cpu_dai, codec_dai, component driver has the delay callback, then 1397 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1398 */ 1399 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1400 { 1401 struct snd_pcm_runtime *runtime = substream->runtime; 1402 snd_pcm_uframes_t offset = 0; 1403 snd_pcm_sframes_t codec_delay = 0; 1404 snd_pcm_sframes_t cpu_delay = 0; 1405 1406 offset = snd_soc_pcm_component_pointer(substream); 1407 1408 /* should be called *after* snd_soc_pcm_component_pointer() */ 1409 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1410 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1411 1412 runtime->delay = cpu_delay + codec_delay; 1413 1414 return offset; 1415 } 1416 1417 /* connect a FE and BE */ 1418 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1419 struct snd_soc_pcm_runtime *be, int stream) 1420 { 1421 struct snd_pcm_substream *fe_substream; 1422 struct snd_pcm_substream *be_substream; 1423 struct snd_soc_dpcm *dpcm; 1424 1425 snd_soc_dpcm_mutex_assert_held(fe); 1426 1427 /* only add new dpcms */ 1428 for_each_dpcm_be(fe, stream, dpcm) 1429 if (dpcm->be == be) 1430 return 0; 1431 1432 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1433 be_substream = snd_soc_dpcm_get_substream(be, stream); 1434 1435 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) 1436 return snd_soc_ret(be->dev, -EINVAL, 1437 "%s: %s is atomic but %s is nonatomic, invalid configuration\n", 1438 __func__, fe->dai_link->name, be->dai_link->name); 1439 1440 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1441 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1442 be_substream->pcm->nonatomic = 1; 1443 } 1444 1445 dpcm = kzalloc_obj(struct snd_soc_dpcm); 1446 if (!dpcm) 1447 return -ENOMEM; 1448 1449 dpcm->be = be; 1450 dpcm->fe = fe; 1451 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1452 snd_pcm_stream_lock_irq(fe_substream); 1453 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1454 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1455 snd_pcm_stream_unlock_irq(fe_substream); 1456 1457 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1458 snd_pcm_direction_name(stream), fe->dai_link->name, 1459 stream ? "<-" : "->", be->dai_link->name); 1460 1461 dpcm_create_debugfs_state(dpcm, stream); 1462 1463 return 1; 1464 } 1465 1466 /* reparent a BE onto another FE */ 1467 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1468 struct snd_soc_pcm_runtime *be, int stream) 1469 { 1470 struct snd_soc_dpcm *dpcm; 1471 struct snd_pcm_substream *fe_substream, *be_substream; 1472 1473 /* reparent if BE is connected to other FEs */ 1474 if (!be->dpcm[stream].users) 1475 return; 1476 1477 be_substream = snd_soc_dpcm_get_substream(be, stream); 1478 if (!be_substream) 1479 return; 1480 1481 for_each_dpcm_fe(be, stream, dpcm) { 1482 if (dpcm->fe == fe) 1483 continue; 1484 1485 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1486 snd_pcm_direction_name(stream), 1487 dpcm->fe->dai_link->name, 1488 stream ? "<-" : "->", dpcm->be->dai_link->name); 1489 1490 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1491 be_substream->runtime = fe_substream->runtime; 1492 break; 1493 } 1494 } 1495 1496 /* disconnect a BE and FE */ 1497 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1498 { 1499 struct snd_soc_dpcm *dpcm, *d; 1500 struct snd_pcm_substream *substream = snd_soc_dpcm_get_substream(fe, stream); 1501 LIST_HEAD(deleted_dpcms); 1502 1503 snd_soc_dpcm_mutex_assert_held(fe); 1504 1505 snd_pcm_stream_lock_irq(substream); 1506 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1507 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1508 snd_pcm_direction_name(stream), 1509 dpcm->be->dai_link->name); 1510 1511 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1512 continue; 1513 1514 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1515 snd_pcm_direction_name(stream), fe->dai_link->name, 1516 stream ? "<-" : "->", dpcm->be->dai_link->name); 1517 1518 /* BEs still alive need new FE */ 1519 dpcm_be_reparent(fe, dpcm->be, stream); 1520 1521 list_del(&dpcm->list_be); 1522 list_move(&dpcm->list_fe, &deleted_dpcms); 1523 } 1524 snd_pcm_stream_unlock_irq(substream); 1525 1526 while (!list_empty(&deleted_dpcms)) { 1527 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1528 list_fe); 1529 list_del(&dpcm->list_fe); 1530 dpcm_remove_debugfs_state(dpcm); 1531 kfree(dpcm); 1532 } 1533 } 1534 1535 /* get BE for DAI widget and stream */ 1536 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1537 struct snd_soc_dapm_widget *widget, int stream) 1538 { 1539 struct snd_soc_pcm_runtime *be; 1540 struct snd_soc_dapm_widget *w; 1541 struct snd_soc_dai *dai; 1542 int i; 1543 1544 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1545 1546 for_each_card_rtds(card, be) { 1547 1548 if (!be->dai_link->no_pcm) 1549 continue; 1550 1551 if (!snd_soc_dpcm_get_substream(be, stream)) 1552 continue; 1553 1554 for_each_rtd_dais(be, i, dai) { 1555 w = snd_soc_dai_get_widget(dai, stream); 1556 1557 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1558 w ? w->name : "(not set)"); 1559 1560 if (w == widget) 1561 return be; 1562 } 1563 } 1564 1565 /* Widget provided is not a BE */ 1566 return NULL; 1567 } 1568 1569 int widget_in_list(struct snd_soc_dapm_widget_list *list, 1570 struct snd_soc_dapm_widget *widget) 1571 { 1572 struct snd_soc_dapm_widget *w; 1573 int i; 1574 1575 for_each_dapm_widgets(list, i, w) 1576 if (widget == w) 1577 return 1; 1578 1579 return 0; 1580 } 1581 EXPORT_SYMBOL_GPL(widget_in_list); 1582 1583 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1584 { 1585 struct snd_soc_card *card = snd_soc_dapm_to_card(widget->dapm); 1586 struct snd_soc_pcm_runtime *rtd; 1587 int stream; 1588 1589 /* adjust dir to stream */ 1590 if (dir == SND_SOC_DAPM_DIR_OUT) 1591 stream = SNDRV_PCM_STREAM_PLAYBACK; 1592 else 1593 stream = SNDRV_PCM_STREAM_CAPTURE; 1594 1595 rtd = dpcm_get_be(card, widget, stream); 1596 if (rtd) 1597 return true; 1598 1599 return false; 1600 } 1601 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1602 1603 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1604 int stream, struct snd_soc_dapm_widget_list **list) 1605 { 1606 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0); 1607 int paths; 1608 1609 if (fe->dai_link->num_cpus > 1) 1610 return snd_soc_ret(fe->dev, -EINVAL, 1611 "%s doesn't support Multi CPU yet\n", __func__); 1612 1613 /* get number of valid DAI paths and their widgets */ 1614 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1615 fe->card->component_chaining ? 1616 NULL : dpcm_end_walk_at_be); 1617 1618 if (paths > 0) 1619 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1620 snd_pcm_direction_name(stream)); 1621 else if (paths == 0) 1622 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1623 snd_pcm_direction_name(stream)); 1624 1625 return paths; 1626 } 1627 1628 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1629 { 1630 snd_soc_dapm_dai_free_widgets(list); 1631 } 1632 1633 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1634 struct snd_soc_dapm_widget_list *list) 1635 { 1636 struct snd_soc_dai *dai; 1637 unsigned int i; 1638 1639 /* is there a valid DAI widget for this BE */ 1640 for_each_rtd_dais(dpcm->be, i, dai) { 1641 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1642 1643 /* 1644 * The BE is pruned only if none of the dai 1645 * widgets are in the active list. 1646 */ 1647 if (widget && widget_in_list(list, widget)) 1648 return true; 1649 } 1650 1651 return false; 1652 } 1653 1654 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1655 struct snd_soc_dapm_widget_list **list_) 1656 { 1657 struct snd_soc_dpcm *dpcm; 1658 int prune = 0; 1659 1660 /* Destroy any old FE <--> BE connections */ 1661 for_each_dpcm_be(fe, stream, dpcm) { 1662 if (dpcm_be_is_active(dpcm, stream, *list_)) 1663 continue; 1664 1665 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1666 snd_pcm_direction_name(stream), 1667 dpcm->be->dai_link->name, fe->dai_link->name); 1668 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1669 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1670 prune++; 1671 } 1672 1673 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1674 return prune; 1675 } 1676 1677 int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1678 struct snd_soc_dapm_widget_list **list_) 1679 { 1680 struct snd_soc_card *card = fe->card; 1681 struct snd_soc_dapm_widget_list *list = *list_; 1682 struct snd_soc_pcm_runtime *be; 1683 struct snd_soc_dapm_widget *widget; 1684 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1685 int i, new = 0, err; 1686 1687 /* don't connect if FE is not running */ 1688 if (!fe_substream->runtime && !fe->fe_compr) 1689 return new; 1690 1691 /* Create any new FE <--> BE connections */ 1692 for_each_dapm_widgets(list, i, widget) { 1693 1694 switch (widget->id) { 1695 case snd_soc_dapm_dai_in: 1696 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1697 continue; 1698 break; 1699 case snd_soc_dapm_dai_out: 1700 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1701 continue; 1702 break; 1703 default: 1704 continue; 1705 } 1706 1707 /* is there a valid BE rtd for this widget */ 1708 be = dpcm_get_be(card, widget, stream); 1709 if (!be) { 1710 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1711 widget->name); 1712 continue; 1713 } 1714 1715 /* 1716 * Filter for systems with 'component_chaining' enabled. 1717 * This helps to avoid unnecessary re-configuration of an 1718 * already active BE on such systems and ensures the BE DAI 1719 * widget is powered ON after hw_params() BE DAI callback. 1720 */ 1721 if (fe->card->component_chaining && 1722 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1723 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1724 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1725 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1726 continue; 1727 1728 /* newly connected FE and BE */ 1729 err = dpcm_be_connect(fe, be, stream); 1730 if (err < 0) { 1731 dev_err(fe->dev, "ASoC: can't connect %s\n", 1732 widget->name); 1733 break; 1734 } else if (err == 0) /* already connected */ 1735 continue; 1736 1737 /* new */ 1738 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1739 new++; 1740 } 1741 1742 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1743 return new; 1744 } 1745 1746 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1747 { 1748 struct snd_soc_dpcm *dpcm; 1749 1750 for_each_dpcm_be(fe, stream, dpcm) 1751 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1752 } 1753 1754 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1755 int do_hw_free, struct snd_soc_dpcm *last) 1756 { 1757 struct snd_soc_dpcm *dpcm; 1758 1759 /* disable any enabled and non active backends */ 1760 for_each_dpcm_be(fe, stream, dpcm) { 1761 struct snd_soc_pcm_runtime *be = dpcm->be; 1762 struct snd_pcm_substream *be_substream = 1763 snd_soc_dpcm_get_substream(be, stream); 1764 1765 if (dpcm == last) 1766 return; 1767 1768 /* is this op for this BE ? */ 1769 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 1770 continue; 1771 1772 if (be->dpcm[stream].users == 0) { 1773 dev_err(be->dev, "ASoC: no users %s at close - state %s\n", 1774 snd_pcm_direction_name(stream), 1775 dpcm_state_string(be->dpcm[stream].state)); 1776 continue; 1777 } 1778 1779 if (--be->dpcm[stream].users != 0) 1780 continue; 1781 1782 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1783 if (!do_hw_free) 1784 continue; 1785 1786 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1787 __soc_pcm_hw_free(be, be_substream); 1788 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1789 } 1790 } 1791 1792 __soc_pcm_close(be, be_substream); 1793 be_substream->runtime = NULL; 1794 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1795 } 1796 } 1797 1798 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1799 { 1800 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1801 struct snd_soc_pcm_runtime *be; 1802 struct snd_soc_dpcm *dpcm; 1803 int err, count = 0; 1804 1805 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1806 for_each_dpcm_be(fe, stream, dpcm) { 1807 struct snd_pcm_substream *be_substream; 1808 1809 be = dpcm->be; 1810 be_substream = snd_soc_dpcm_get_substream(be, stream); 1811 1812 if (!be_substream) { 1813 dev_err(be->dev, "ASoC: no backend %s stream\n", 1814 snd_pcm_direction_name(stream)); 1815 continue; 1816 } 1817 1818 /* is this op for this BE ? */ 1819 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 1820 continue; 1821 1822 /* first time the dpcm is open ? */ 1823 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1824 dev_err(be->dev, "ASoC: too many users %s at open %s\n", 1825 snd_pcm_direction_name(stream), 1826 dpcm_state_string(be->dpcm[stream].state)); 1827 continue; 1828 } 1829 1830 if (be->dpcm[stream].users++ != 0) 1831 continue; 1832 1833 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1834 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1835 continue; 1836 1837 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1838 snd_pcm_direction_name(stream), be->dai_link->name); 1839 1840 be_substream->runtime = fe_substream->runtime; 1841 err = __soc_pcm_open(be, be_substream); 1842 if (err < 0) { 1843 be->dpcm[stream].users--; 1844 if (be->dpcm[stream].users < 0) 1845 dev_err(be->dev, "ASoC: no users %s at unwind %s\n", 1846 snd_pcm_direction_name(stream), 1847 dpcm_state_string(be->dpcm[stream].state)); 1848 1849 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1850 goto unwind; 1851 } 1852 be->dpcm[stream].be_start = 0; 1853 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1854 count++; 1855 } 1856 1857 return count; 1858 1859 unwind: 1860 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1861 1862 return soc_pcm_ret(fe, err); 1863 } 1864 1865 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1866 { 1867 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1868 struct snd_pcm_runtime *runtime = substream->runtime; 1869 struct snd_pcm_hardware *hw = &runtime->hw; 1870 struct snd_soc_dai *dai; 1871 int stream = substream->stream; 1872 int i; 1873 1874 soc_pcm_hw_init(hw, false); 1875 1876 for_each_rtd_cpu_dais(fe, i, dai) { 1877 const struct snd_soc_pcm_stream *cpu_stream; 1878 1879 /* 1880 * Skip CPUs which don't support the current stream 1881 * type. See soc_pcm_init_runtime_hw() for more details 1882 */ 1883 if (!snd_soc_dai_stream_valid(dai, stream)) 1884 continue; 1885 1886 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1887 1888 soc_pcm_hw_update_rate(hw, cpu_stream); 1889 soc_pcm_hw_update_chan(hw, cpu_stream); 1890 soc_pcm_hw_update_format(hw, cpu_stream); 1891 } 1892 1893 } 1894 1895 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1896 { 1897 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1898 struct snd_pcm_runtime *runtime = substream->runtime; 1899 struct snd_pcm_hardware *hw = &runtime->hw; 1900 struct snd_soc_dpcm *dpcm; 1901 struct snd_soc_dai *dai; 1902 int stream = substream->stream; 1903 1904 if (!fe->dai_link->dpcm_merged_format) 1905 return; 1906 1907 /* 1908 * It returns merged BE codec format 1909 * if FE want to use it (= dpcm_merged_format) 1910 */ 1911 1912 for_each_dpcm_be(fe, stream, dpcm) { 1913 struct snd_soc_pcm_runtime *be = dpcm->be; 1914 const struct snd_soc_pcm_stream *codec_stream; 1915 int i; 1916 1917 for_each_rtd_codec_dais(be, i, dai) { 1918 /* 1919 * Skip CODECs which don't support the current stream 1920 * type. See soc_pcm_init_runtime_hw() for more details 1921 */ 1922 if (!snd_soc_dai_stream_valid(dai, stream)) 1923 continue; 1924 1925 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1926 1927 soc_pcm_hw_update_format(hw, codec_stream); 1928 } 1929 } 1930 } 1931 1932 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1933 { 1934 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1935 struct snd_pcm_runtime *runtime = substream->runtime; 1936 struct snd_pcm_hardware *hw = &runtime->hw; 1937 struct snd_soc_dpcm *dpcm; 1938 int stream = substream->stream; 1939 1940 if (!fe->dai_link->dpcm_merged_chan) 1941 return; 1942 1943 /* 1944 * It returns merged BE codec channel; 1945 * if FE want to use it (= dpcm_merged_chan) 1946 */ 1947 1948 for_each_dpcm_be(fe, stream, dpcm) { 1949 struct snd_soc_pcm_runtime *be = dpcm->be; 1950 const struct snd_soc_pcm_stream *cpu_stream; 1951 struct snd_soc_dai *dai; 1952 int i; 1953 1954 for_each_rtd_cpu_dais(be, i, dai) { 1955 /* 1956 * Skip CPUs which don't support the current stream 1957 * type. See soc_pcm_init_runtime_hw() for more details 1958 */ 1959 if (!snd_soc_dai_stream_valid(dai, stream)) 1960 continue; 1961 1962 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1963 1964 soc_pcm_hw_update_chan(hw, cpu_stream); 1965 } 1966 1967 /* 1968 * chan min/max cannot be enforced if there are multiple CODEC 1969 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1970 */ 1971 if (be->dai_link->num_codecs == 1) { 1972 const struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1973 snd_soc_rtd_to_codec(be, 0), stream); 1974 1975 soc_pcm_hw_update_chan(hw, codec_stream); 1976 } 1977 } 1978 } 1979 1980 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1981 { 1982 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1983 struct snd_pcm_runtime *runtime = substream->runtime; 1984 struct snd_pcm_hardware *hw = &runtime->hw; 1985 struct snd_soc_dpcm *dpcm; 1986 int stream = substream->stream; 1987 1988 if (!fe->dai_link->dpcm_merged_rate) 1989 return; 1990 1991 /* 1992 * It returns merged BE codec channel; 1993 * if FE want to use it (= dpcm_merged_chan) 1994 */ 1995 1996 for_each_dpcm_be(fe, stream, dpcm) { 1997 struct snd_soc_pcm_runtime *be = dpcm->be; 1998 const struct snd_soc_pcm_stream *pcm; 1999 struct snd_soc_dai *dai; 2000 int i; 2001 2002 for_each_rtd_dais(be, i, dai) { 2003 /* 2004 * Skip DAIs which don't support the current stream 2005 * type. See soc_pcm_init_runtime_hw() for more details 2006 */ 2007 if (!snd_soc_dai_stream_valid(dai, stream)) 2008 continue; 2009 2010 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 2011 2012 soc_pcm_hw_update_rate(hw, pcm); 2013 } 2014 } 2015 } 2016 2017 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 2018 int stream) 2019 { 2020 struct snd_soc_dpcm *dpcm; 2021 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2022 struct snd_soc_dai *fe_cpu_dai; 2023 int err = 0; 2024 int i; 2025 2026 /* apply symmetry for FE */ 2027 soc_pcm_update_symmetry(fe_substream); 2028 2029 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 2030 /* Symmetry only applies if we've got an active stream. */ 2031 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 2032 if (err < 0) 2033 goto error; 2034 } 2035 2036 /* apply symmetry for BE */ 2037 for_each_dpcm_be(fe, stream, dpcm) { 2038 struct snd_soc_pcm_runtime *be = dpcm->be; 2039 struct snd_pcm_substream *be_substream = 2040 snd_soc_dpcm_get_substream(be, stream); 2041 struct snd_soc_pcm_runtime *rtd; 2042 struct snd_soc_dai *dai; 2043 2044 /* A backend may not have the requested substream */ 2045 if (!be_substream) 2046 continue; 2047 2048 rtd = snd_soc_substream_to_rtd(be_substream); 2049 if (rtd->dai_link->be_hw_params_fixup) 2050 continue; 2051 2052 soc_pcm_update_symmetry(be_substream); 2053 2054 /* Symmetry only applies if we've got an active stream. */ 2055 for_each_rtd_dais(rtd, i, dai) { 2056 err = soc_pcm_apply_symmetry(fe_substream, dai); 2057 if (err < 0) 2058 goto error; 2059 } 2060 } 2061 error: 2062 return soc_pcm_ret(fe, err); 2063 } 2064 2065 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 2066 { 2067 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2068 int stream = fe_substream->stream, ret = 0; 2069 2070 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2071 2072 ret = dpcm_be_dai_startup(fe, stream); 2073 if (ret < 0) 2074 goto be_err; 2075 2076 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 2077 2078 /* start the DAI frontend */ 2079 ret = __soc_pcm_open(fe, fe_substream); 2080 if (ret < 0) 2081 goto unwind; 2082 2083 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 2084 2085 dpcm_runtime_setup_fe(fe_substream); 2086 2087 dpcm_runtime_setup_be_format(fe_substream); 2088 dpcm_runtime_setup_be_chan(fe_substream); 2089 dpcm_runtime_setup_be_rate(fe_substream); 2090 2091 ret = dpcm_apply_symmetry(fe_substream, stream); 2092 2093 unwind: 2094 if (ret < 0) 2095 dpcm_be_dai_startup_unwind(fe, stream); 2096 be_err: 2097 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2098 2099 return soc_pcm_ret(fe, ret); 2100 } 2101 2102 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 2103 { 2104 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2105 int stream = substream->stream; 2106 2107 snd_soc_dpcm_mutex_assert_held(fe); 2108 2109 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2110 2111 /* shutdown the BEs */ 2112 dpcm_be_dai_shutdown(fe, stream); 2113 2114 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 2115 2116 /* now shutdown the frontend */ 2117 __soc_pcm_close(fe, substream); 2118 2119 /* run the stream stop event */ 2120 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 2121 2122 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2123 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2124 return 0; 2125 } 2126 2127 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 2128 { 2129 struct snd_soc_dpcm *dpcm; 2130 2131 /* only hw_params backends that are either sinks or sources 2132 * to this frontend DAI */ 2133 for_each_dpcm_be(fe, stream, dpcm) { 2134 2135 struct snd_soc_pcm_runtime *be = dpcm->be; 2136 struct snd_pcm_substream *be_substream = 2137 snd_soc_dpcm_get_substream(be, stream); 2138 2139 /* is this op for this BE ? */ 2140 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2141 continue; 2142 2143 /* only free hw when no longer used - check all FEs */ 2144 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2145 continue; 2146 2147 /* do not free hw if this BE is used by other FE */ 2148 if (be->dpcm[stream].users > 1) 2149 continue; 2150 2151 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2152 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2153 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2154 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2155 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2156 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2157 continue; 2158 2159 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2160 be->dai_link->name); 2161 2162 __soc_pcm_hw_free(be, be_substream); 2163 2164 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2165 } 2166 } 2167 2168 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2169 { 2170 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2171 int stream = substream->stream; 2172 2173 snd_soc_dpcm_mutex_lock(fe); 2174 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2175 2176 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2177 2178 /* call hw_free on the frontend */ 2179 soc_pcm_hw_clean(fe, substream, 0); 2180 2181 /* only hw_params backends that are either sinks or sources 2182 * to this frontend DAI */ 2183 dpcm_be_dai_hw_free(fe, stream); 2184 2185 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2186 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2187 2188 snd_soc_dpcm_mutex_unlock(fe); 2189 return 0; 2190 } 2191 2192 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2193 { 2194 struct snd_soc_pcm_runtime *be; 2195 struct snd_pcm_substream *be_substream; 2196 struct snd_soc_dpcm *dpcm; 2197 int ret; 2198 2199 for_each_dpcm_be(fe, stream, dpcm) { 2200 struct snd_pcm_hw_params hw_params; 2201 2202 be = dpcm->be; 2203 be_substream = snd_soc_dpcm_get_substream(be, stream); 2204 2205 /* is this op for this BE ? */ 2206 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2207 continue; 2208 2209 /* copy params for each dpcm */ 2210 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 2211 sizeof(struct snd_pcm_hw_params)); 2212 2213 /* perform any hw_params fixups */ 2214 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 2215 if (ret < 0) 2216 goto unwind; 2217 2218 /* copy the fixed-up hw params for BE dai */ 2219 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2220 sizeof(struct snd_pcm_hw_params)); 2221 2222 /* only allow hw_params() if no connected FEs are running */ 2223 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2224 continue; 2225 2226 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2227 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2228 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2229 continue; 2230 2231 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2232 be->dai_link->name); 2233 2234 ret = __soc_pcm_hw_params(be_substream, &hw_params); 2235 if (ret < 0) 2236 goto unwind; 2237 2238 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2239 } 2240 return 0; 2241 2242 unwind: 2243 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2244 __func__, be->dai_link->name, ret); 2245 2246 /* disable any enabled and non active backends */ 2247 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2248 be = dpcm->be; 2249 be_substream = snd_soc_dpcm_get_substream(be, stream); 2250 2251 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2252 continue; 2253 2254 /* only allow hw_free() if no connected FEs are running */ 2255 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2256 continue; 2257 2258 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2259 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2260 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2261 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2262 continue; 2263 2264 __soc_pcm_hw_free(be, be_substream); 2265 } 2266 2267 return ret; 2268 } 2269 2270 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2271 struct snd_pcm_hw_params *params) 2272 { 2273 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2274 int ret, stream = substream->stream; 2275 2276 snd_soc_dpcm_mutex_lock(fe); 2277 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2278 2279 memcpy(&fe->dpcm[stream].hw_params, params, 2280 sizeof(struct snd_pcm_hw_params)); 2281 ret = dpcm_be_dai_hw_params(fe, stream); 2282 if (ret < 0) 2283 goto out; 2284 2285 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2286 fe->dai_link->name, params_rate(params), 2287 params_channels(params), params_format(params)); 2288 2289 /* call hw_params on the frontend */ 2290 ret = __soc_pcm_hw_params(substream, params); 2291 if (ret < 0) 2292 dpcm_be_dai_hw_free(fe, stream); 2293 else 2294 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2295 2296 out: 2297 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2298 snd_soc_dpcm_mutex_unlock(fe); 2299 2300 return soc_pcm_ret(fe, ret); 2301 } 2302 2303 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2304 int cmd) 2305 { 2306 struct snd_soc_pcm_runtime *be; 2307 bool pause_stop_transition; 2308 struct snd_soc_dpcm *dpcm; 2309 unsigned long flags; 2310 int ret = 0; 2311 2312 for_each_dpcm_be(fe, stream, dpcm) { 2313 struct snd_pcm_substream *be_substream; 2314 2315 be = dpcm->be; 2316 be_substream = snd_soc_dpcm_get_substream(be, stream); 2317 2318 snd_pcm_stream_lock_irqsave_nested(be_substream, flags); 2319 2320 /* is this op for this BE ? */ 2321 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2322 goto next; 2323 2324 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2325 be->dai_link->name, cmd); 2326 2327 switch (cmd) { 2328 case SNDRV_PCM_TRIGGER_START: 2329 if (!be->dpcm[stream].be_start && 2330 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2331 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2332 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2333 goto next; 2334 2335 be->dpcm[stream].be_start++; 2336 if (be->dpcm[stream].be_start != 1) 2337 goto next; 2338 2339 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2340 ret = soc_pcm_trigger(be_substream, 2341 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2342 else 2343 ret = soc_pcm_trigger(be_substream, 2344 SNDRV_PCM_TRIGGER_START); 2345 if (ret) { 2346 be->dpcm[stream].be_start--; 2347 goto next; 2348 } 2349 2350 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2351 break; 2352 case SNDRV_PCM_TRIGGER_RESUME: 2353 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2354 goto next; 2355 2356 be->dpcm[stream].be_start++; 2357 if (be->dpcm[stream].be_start != 1) 2358 goto next; 2359 2360 ret = soc_pcm_trigger(be_substream, cmd); 2361 if (ret) { 2362 be->dpcm[stream].be_start--; 2363 goto next; 2364 } 2365 2366 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2367 break; 2368 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2369 if (!be->dpcm[stream].be_start && 2370 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2371 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2372 goto next; 2373 2374 fe->dpcm[stream].fe_pause = false; 2375 be->dpcm[stream].be_pause--; 2376 2377 be->dpcm[stream].be_start++; 2378 if (be->dpcm[stream].be_start != 1) 2379 goto next; 2380 2381 ret = soc_pcm_trigger(be_substream, cmd); 2382 if (ret) { 2383 be->dpcm[stream].be_start--; 2384 goto next; 2385 } 2386 2387 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2388 break; 2389 case SNDRV_PCM_TRIGGER_STOP: 2390 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2391 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2392 goto next; 2393 2394 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2395 be->dpcm[stream].be_start--; 2396 2397 if (be->dpcm[stream].be_start != 0) 2398 goto next; 2399 2400 pause_stop_transition = false; 2401 if (fe->dpcm[stream].fe_pause) { 2402 pause_stop_transition = true; 2403 fe->dpcm[stream].fe_pause = false; 2404 be->dpcm[stream].be_pause--; 2405 } 2406 2407 if (be->dpcm[stream].be_pause != 0) 2408 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2409 else 2410 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2411 2412 if (ret) { 2413 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2414 be->dpcm[stream].be_start++; 2415 if (pause_stop_transition) { 2416 fe->dpcm[stream].fe_pause = true; 2417 be->dpcm[stream].be_pause++; 2418 } 2419 goto next; 2420 } 2421 2422 if (be->dpcm[stream].be_pause != 0) 2423 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2424 else 2425 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2426 2427 break; 2428 case SNDRV_PCM_TRIGGER_SUSPEND: 2429 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2430 goto next; 2431 2432 be->dpcm[stream].be_start--; 2433 if (be->dpcm[stream].be_start != 0) 2434 goto next; 2435 2436 ret = soc_pcm_trigger(be_substream, cmd); 2437 if (ret) { 2438 be->dpcm[stream].be_start++; 2439 goto next; 2440 } 2441 2442 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2443 break; 2444 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2445 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2446 goto next; 2447 2448 fe->dpcm[stream].fe_pause = true; 2449 be->dpcm[stream].be_pause++; 2450 2451 be->dpcm[stream].be_start--; 2452 if (be->dpcm[stream].be_start != 0) 2453 goto next; 2454 2455 ret = soc_pcm_trigger(be_substream, cmd); 2456 if (ret) { 2457 be->dpcm[stream].be_start++; 2458 goto next; 2459 } 2460 2461 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2462 break; 2463 } 2464 next: 2465 snd_pcm_stream_unlock_irqrestore(be_substream, flags); 2466 if (ret) 2467 break; 2468 } 2469 return soc_pcm_ret(fe, ret); 2470 } 2471 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2472 2473 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2474 int cmd, bool fe_first) 2475 { 2476 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2477 int ret; 2478 2479 /* call trigger on the frontend before the backend. */ 2480 if (fe_first) { 2481 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2482 fe->dai_link->name, cmd); 2483 2484 ret = soc_pcm_trigger(substream, cmd); 2485 if (ret < 0) 2486 goto end; 2487 2488 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2489 } 2490 /* call trigger on the frontend after the backend. */ 2491 else { 2492 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2493 if (ret < 0) 2494 goto end; 2495 2496 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2497 fe->dai_link->name, cmd); 2498 2499 ret = soc_pcm_trigger(substream, cmd); 2500 } 2501 end: 2502 return snd_soc_ret(fe->dev, ret, "trigger FE cmd: %d failed\n", cmd); 2503 } 2504 2505 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2506 { 2507 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2508 int stream = substream->stream; 2509 int ret = 0; 2510 int fe_first; 2511 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2512 2513 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2514 2515 switch (trigger) { 2516 case SND_SOC_DPCM_TRIGGER_PRE: 2517 fe_first = true; 2518 break; 2519 case SND_SOC_DPCM_TRIGGER_POST: 2520 fe_first = false; 2521 break; 2522 default: 2523 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2524 fe->dai_link->name); 2525 ret = -EINVAL; 2526 goto out; 2527 } 2528 2529 switch (cmd) { 2530 case SNDRV_PCM_TRIGGER_START: 2531 case SNDRV_PCM_TRIGGER_RESUME: 2532 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2533 case SNDRV_PCM_TRIGGER_DRAIN: 2534 ret = dpcm_dai_trigger_fe_be(substream, cmd, fe_first); 2535 break; 2536 case SNDRV_PCM_TRIGGER_STOP: 2537 case SNDRV_PCM_TRIGGER_SUSPEND: 2538 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2539 ret = dpcm_dai_trigger_fe_be(substream, cmd, !fe_first); 2540 break; 2541 default: 2542 ret = -EINVAL; 2543 break; 2544 } 2545 2546 if (ret < 0) 2547 goto out; 2548 2549 switch (cmd) { 2550 case SNDRV_PCM_TRIGGER_START: 2551 case SNDRV_PCM_TRIGGER_RESUME: 2552 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2553 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2554 break; 2555 case SNDRV_PCM_TRIGGER_STOP: 2556 case SNDRV_PCM_TRIGGER_SUSPEND: 2557 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2558 break; 2559 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2560 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2561 break; 2562 } 2563 2564 out: 2565 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2566 return ret; 2567 } 2568 2569 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2570 { 2571 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2572 int stream = substream->stream; 2573 2574 /* if FE's runtime_update is already set, we're in race; 2575 * process this trigger later at exit 2576 */ 2577 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2578 fe->dpcm[stream].trigger_pending = cmd + 1; 2579 return 0; /* delayed, assuming it's successful */ 2580 } 2581 2582 /* we're alone, let's trigger */ 2583 return dpcm_fe_dai_do_trigger(substream, cmd); 2584 } 2585 2586 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2587 { 2588 struct snd_soc_dpcm *dpcm; 2589 int ret = 0; 2590 2591 for_each_dpcm_be(fe, stream, dpcm) { 2592 2593 struct snd_soc_pcm_runtime *be = dpcm->be; 2594 struct snd_pcm_substream *be_substream = 2595 snd_soc_dpcm_get_substream(be, stream); 2596 2597 /* is this op for this BE ? */ 2598 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2599 continue; 2600 2601 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream)) 2602 continue; 2603 2604 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2605 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2606 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2607 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2608 continue; 2609 2610 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2611 be->dai_link->name); 2612 2613 ret = __soc_pcm_prepare(be, be_substream); 2614 if (ret < 0) 2615 break; 2616 2617 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2618 } 2619 2620 /* 2621 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 2622 * 2623 * We don't want to log an error since we do not want to give userspace a way to do a 2624 * denial-of-service attack on the syslog / diskspace. 2625 */ 2626 return ret; 2627 } 2628 2629 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2630 { 2631 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2632 int stream = substream->stream, ret = 0; 2633 2634 snd_soc_dpcm_mutex_lock(fe); 2635 2636 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2637 2638 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2639 2640 ret = dpcm_be_dai_prepare(fe, stream); 2641 if (ret < 0) 2642 goto out; 2643 2644 /* call prepare on the frontend */ 2645 ret = __soc_pcm_prepare(fe, substream); 2646 if (ret < 0) 2647 goto out; 2648 2649 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2650 2651 out: 2652 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2653 snd_soc_dpcm_mutex_unlock(fe); 2654 2655 /* 2656 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 2657 * 2658 * We don't want to log an error since we do not want to give userspace a way to do a 2659 * denial-of-service attack on the syslog / diskspace. 2660 */ 2661 return ret; 2662 } 2663 2664 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2665 { 2666 int err; 2667 2668 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2669 snd_pcm_direction_name(stream), fe->dai_link->name); 2670 2671 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2672 2673 dpcm_be_dai_hw_free(fe, stream); 2674 2675 dpcm_be_dai_shutdown(fe, stream); 2676 2677 /* run the stream event for each BE */ 2678 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2679 2680 return soc_pcm_ret(fe, err); 2681 } 2682 2683 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2684 { 2685 struct snd_soc_dpcm *dpcm; 2686 int ret = 0; 2687 2688 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2689 snd_pcm_direction_name(stream), fe->dai_link->name); 2690 2691 /* Only start the BE if the FE is ready */ 2692 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2693 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2694 dev_err(fe->dev, "ASoC: FE %s is not ready %s\n", 2695 fe->dai_link->name, dpcm_state_string(fe->dpcm[stream].state)); 2696 ret = -EINVAL; 2697 goto disconnect; 2698 } 2699 2700 /* startup must always be called for new BEs */ 2701 ret = dpcm_be_dai_startup(fe, stream); 2702 if (ret < 0) 2703 goto disconnect; 2704 2705 /* keep going if FE state is > open */ 2706 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2707 return 0; 2708 2709 ret = dpcm_be_dai_hw_params(fe, stream); 2710 if (ret < 0) 2711 goto close; 2712 2713 /* keep going if FE state is > hw_params */ 2714 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2715 return 0; 2716 2717 ret = dpcm_be_dai_prepare(fe, stream); 2718 if (ret < 0) 2719 goto hw_free; 2720 2721 /* run the stream event for each BE */ 2722 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2723 2724 /* keep going if FE state is > prepare */ 2725 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2726 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2727 return 0; 2728 2729 ret = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_START); 2730 if (ret < 0) 2731 goto hw_free; 2732 2733 return 0; 2734 2735 hw_free: 2736 dpcm_be_dai_hw_free(fe, stream); 2737 close: 2738 dpcm_be_dai_shutdown(fe, stream); 2739 disconnect: 2740 /* disconnect any pending BEs */ 2741 for_each_dpcm_be(fe, stream, dpcm) { 2742 struct snd_soc_pcm_runtime *be = dpcm->be; 2743 2744 /* is this op for this BE ? */ 2745 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2746 continue; 2747 2748 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2749 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2750 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2751 } 2752 2753 return soc_pcm_ret(fe, ret); 2754 } 2755 2756 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2757 { 2758 struct snd_soc_dapm_widget_list *list; 2759 int stream; 2760 int count, paths; 2761 2762 if (!fe->dai_link->dynamic) 2763 return 0; 2764 2765 if (fe->dai_link->num_cpus > 1) 2766 return snd_soc_ret(fe->dev, -EINVAL, 2767 "%s doesn't support Multi CPU yet\n", __func__); 2768 2769 /* only check active links */ 2770 if (!snd_soc_dai_active(snd_soc_rtd_to_cpu(fe, 0))) 2771 return 0; 2772 2773 /* DAPM sync will call this to update DSP paths */ 2774 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2775 new ? "new" : "old", fe->dai_link->name); 2776 2777 for_each_pcm_streams(stream) { 2778 2779 /* skip if FE doesn't have playback/capture capability */ 2780 if (!snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream) || 2781 !snd_soc_dai_stream_valid(snd_soc_rtd_to_codec(fe, 0), stream)) 2782 continue; 2783 2784 /* skip if FE isn't currently playing/capturing */ 2785 if (!snd_soc_dai_stream_active(snd_soc_rtd_to_cpu(fe, 0), stream) || 2786 !snd_soc_dai_stream_active(snd_soc_rtd_to_codec(fe, 0), stream)) 2787 continue; 2788 2789 paths = dpcm_path_get(fe, stream, &list); 2790 if (paths < 0) 2791 return paths; 2792 2793 /* update any playback/capture paths */ 2794 /* 2795 * Find the corresponding BE DAIs that source or sink audio to this 2796 * FE substream. 2797 */ 2798 if (new) 2799 count = dpcm_add_paths(fe, stream, &list); 2800 else 2801 count = dpcm_prune_paths(fe, stream, &list); 2802 if (count) { 2803 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2804 if (new) 2805 dpcm_run_update_startup(fe, stream); 2806 else 2807 dpcm_run_update_shutdown(fe, stream); 2808 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2809 2810 dpcm_clear_pending_state(fe, stream); 2811 dpcm_be_disconnect(fe, stream); 2812 } 2813 2814 dpcm_path_put(&list); 2815 } 2816 2817 return 0; 2818 } 2819 2820 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2821 * any DAI links. 2822 */ 2823 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2824 { 2825 struct snd_soc_pcm_runtime *fe; 2826 int ret = 0; 2827 2828 snd_soc_dpcm_mutex_lock(card); 2829 /* shutdown all old paths first */ 2830 for_each_card_rtds(card, fe) { 2831 ret = soc_dpcm_fe_runtime_update(fe, 0); 2832 if (ret) 2833 goto out; 2834 } 2835 2836 /* bring new paths up */ 2837 for_each_card_rtds(card, fe) { 2838 ret = soc_dpcm_fe_runtime_update(fe, 1); 2839 if (ret) 2840 goto out; 2841 } 2842 2843 out: 2844 snd_soc_dpcm_mutex_unlock(card); 2845 2846 return snd_soc_ret(card->dev, ret, "%s() failed\n", __func__); 2847 } 2848 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2849 2850 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2851 { 2852 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2853 struct snd_soc_dpcm *dpcm; 2854 int stream = fe_substream->stream; 2855 2856 snd_soc_dpcm_mutex_assert_held(fe); 2857 2858 /* mark FE's links ready to prune */ 2859 for_each_dpcm_be(fe, stream, dpcm) 2860 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2861 2862 dpcm_be_disconnect(fe, stream); 2863 } 2864 2865 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2866 { 2867 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2868 int ret; 2869 2870 snd_soc_dpcm_mutex_lock(fe); 2871 ret = dpcm_fe_dai_shutdown(fe_substream); 2872 2873 dpcm_fe_dai_cleanup(fe_substream); 2874 2875 snd_soc_dpcm_mutex_unlock(fe); 2876 return ret; 2877 } 2878 2879 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2880 { 2881 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2882 struct snd_soc_dapm_widget_list *list; 2883 int ret; 2884 int stream = fe_substream->stream; 2885 2886 snd_soc_dpcm_mutex_lock(fe); 2887 2888 ret = dpcm_path_get(fe, stream, &list); 2889 if (ret < 0) 2890 goto open_end; 2891 2892 /* calculate valid and active FE <-> BE dpcms */ 2893 dpcm_add_paths(fe, stream, &list); 2894 2895 /* There is no point starting up this FE if there are no BEs. */ 2896 if (list_empty(&fe->dpcm[stream].be_clients)) { 2897 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles. */ 2898 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n", 2899 fe->dai_link->name); 2900 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n", fe->dai_link->name); 2901 2902 ret = -EINVAL; 2903 goto put_path; 2904 } 2905 2906 ret = dpcm_fe_dai_startup(fe_substream); 2907 if (ret < 0) 2908 dpcm_fe_dai_cleanup(fe_substream); 2909 2910 dpcm_clear_pending_state(fe, stream); 2911 put_path: 2912 dpcm_path_put(&list); 2913 open_end: 2914 snd_soc_dpcm_mutex_unlock(fe); 2915 return ret; 2916 } 2917 2918 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2919 int *playback, int *capture) 2920 { 2921 struct snd_soc_dai_link *dai_link = rtd->dai_link; 2922 struct snd_soc_dai *cpu_dai; 2923 struct snd_soc_dai *codec_dai; 2924 struct snd_soc_dai_link_ch_map *ch_maps; 2925 struct snd_soc_dai *dummy_dai = snd_soc_find_dai(&snd_soc_dummy_dlc); 2926 int cpu_capture; 2927 int cpu_playback; 2928 int has_playback = 0; 2929 int has_capture = 0; 2930 int i; 2931 2932 if (dai_link->dynamic && dai_link->num_cpus > 1) 2933 return snd_soc_ret(rtd->dev, -EINVAL, 2934 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2935 2936 /* Adapt stream for codec2codec links */ 2937 cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE); 2938 cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK); 2939 2940 /* 2941 * see 2942 * soc.h :: [dai_link->ch_maps Image sample] 2943 */ 2944 for_each_rtd_ch_maps(rtd, i, ch_maps) { 2945 cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu); 2946 codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec); 2947 2948 /* 2949 * FIXME 2950 * 2951 * DPCM Codec has been no checked before. 2952 * It should be checked, but it breaks compatibility. 2953 * 2954 * For example there is a case that CPU have loopback capabilities which is used 2955 * for tests on boards where the Codec has no capture capabilities. In this case, 2956 * Codec capture validation check will be fail, but system should allow capture 2957 * capabilities. We have no solution for it today. 2958 */ 2959 if (dai_link->dynamic || dai_link->no_pcm) 2960 codec_dai = dummy_dai; 2961 2962 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2963 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2964 has_playback = 1; 2965 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2966 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2967 has_capture = 1; 2968 } 2969 2970 if (dai_link->playback_only) 2971 has_capture = 0; 2972 2973 if (dai_link->capture_only) 2974 has_playback = 0; 2975 2976 if (!has_playback && !has_capture) 2977 return snd_soc_ret(rtd->dev, -EINVAL, 2978 "substream %s has no playback, no capture\n", dai_link->stream_name); 2979 2980 *playback = has_playback; 2981 *capture = has_capture; 2982 2983 return 0; 2984 } 2985 2986 static int soc_create_pcm(struct snd_pcm **pcm, 2987 struct snd_soc_pcm_runtime *rtd, 2988 int playback, int capture) 2989 { 2990 char new_name[64]; 2991 int ret; 2992 2993 /* create the PCM */ 2994 if (rtd->dai_link->c2c_params) { 2995 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2996 rtd->dai_link->stream_name); 2997 2998 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id, 2999 playback, capture, pcm); 3000 } else if (rtd->dai_link->no_pcm) { 3001 snprintf(new_name, sizeof(new_name), "(%s)", 3002 rtd->dai_link->stream_name); 3003 3004 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id, 3005 playback, capture, pcm); 3006 } else { 3007 if (rtd->dai_link->dynamic) 3008 snprintf(new_name, sizeof(new_name), "%s (*)", 3009 rtd->dai_link->stream_name); 3010 else 3011 snprintf(new_name, sizeof(new_name), "%s %s-%d", 3012 rtd->dai_link->stream_name, 3013 soc_codec_dai_name(rtd), rtd->id); 3014 3015 ret = snd_pcm_new(rtd->card->snd_card, new_name, rtd->id, playback, 3016 capture, pcm); 3017 } 3018 if (ret < 0) 3019 return snd_soc_ret(rtd->dev, ret, 3020 "can't create pcm %s for dailink %s\n", new_name, rtd->dai_link->name); 3021 3022 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n", rtd->id, new_name); 3023 3024 return 0; 3025 } 3026 3027 /* create a new pcm */ 3028 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd) 3029 { 3030 struct snd_soc_component *component; 3031 struct snd_pcm *pcm; 3032 int ret = 0, playback = 0, capture = 0; 3033 int i; 3034 3035 ret = soc_get_playback_capture(rtd, &playback, &capture); 3036 if (ret < 0) 3037 return ret; 3038 3039 ret = soc_create_pcm(&pcm, rtd, playback, capture); 3040 if (ret < 0) 3041 return ret; 3042 3043 /* DAPM dai link stream work */ 3044 /* 3045 * Currently nothing to do for c2c links 3046 * Since c2c links are internal nodes in the DAPM graph and 3047 * don't interface with the outside world or application layer 3048 * we don't have to do any special handling on close. 3049 */ 3050 if (!rtd->dai_link->c2c_params) 3051 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 3052 3053 rtd->pcm = pcm; 3054 pcm->nonatomic = rtd->dai_link->nonatomic; 3055 pcm->private_data = rtd; 3056 pcm->no_device_suspend = true; 3057 3058 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { 3059 if (playback) 3060 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 3061 if (capture) 3062 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 3063 goto out; 3064 } 3065 3066 /* ASoC PCM operations */ 3067 if (rtd->dai_link->dynamic) { 3068 rtd->ops.open = dpcm_fe_dai_open; 3069 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 3070 rtd->ops.prepare = dpcm_fe_dai_prepare; 3071 rtd->ops.trigger = dpcm_fe_dai_trigger; 3072 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 3073 rtd->ops.close = dpcm_fe_dai_close; 3074 rtd->ops.pointer = soc_pcm_pointer; 3075 } else { 3076 rtd->ops.open = soc_pcm_open; 3077 rtd->ops.hw_params = soc_pcm_hw_params; 3078 rtd->ops.prepare = soc_pcm_prepare; 3079 rtd->ops.trigger = soc_pcm_trigger; 3080 rtd->ops.hw_free = soc_pcm_hw_free; 3081 rtd->ops.close = soc_pcm_close; 3082 rtd->ops.pointer = soc_pcm_pointer; 3083 } 3084 3085 for_each_rtd_components(rtd, i, component) { 3086 const struct snd_soc_component_driver *drv = component->driver; 3087 3088 if (drv->ioctl) 3089 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 3090 if (drv->sync_stop) 3091 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 3092 if (drv->copy) 3093 rtd->ops.copy = snd_soc_pcm_component_copy; 3094 if (drv->page) 3095 rtd->ops.page = snd_soc_pcm_component_page; 3096 if (drv->mmap) 3097 rtd->ops.mmap = snd_soc_pcm_component_mmap; 3098 if (drv->ack) 3099 rtd->ops.ack = snd_soc_pcm_component_ack; 3100 } 3101 3102 if (playback) 3103 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 3104 3105 if (capture) 3106 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 3107 3108 ret = snd_soc_pcm_component_new(rtd); 3109 if (ret < 0) 3110 return ret; 3111 out: 3112 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 3113 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 3114 return ret; 3115 } 3116 3117 /* get the substream for this BE */ 3118 struct snd_pcm_substream * 3119 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3120 { 3121 return be->pcm->streams[stream].substream; 3122 } 3123 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3124