1 /* 2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management 3 * 4 * Copyright 2005 Wolfson Microelectronics PLC. 5 * Author: Liam Girdwood <lrg@slimlogic.co.uk> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 * Features: 13 * o Changes power status of internal codec blocks depending on the 14 * dynamic configuration of codec internal audio paths and active 15 * DACs/ADCs. 16 * o Platform power domain - can support external components i.e. amps and 17 * mic/headphone insertion events. 18 * o Automatic Mic Bias support 19 * o Jack insertion power event initiation - e.g. hp insertion will enable 20 * sinks, dacs, etc 21 * o Delayed power down of audio subsystem to reduce pops between a quick 22 * device reopen. 23 * 24 */ 25 26 #include <linux/module.h> 27 #include <linux/moduleparam.h> 28 #include <linux/init.h> 29 #include <linux/async.h> 30 #include <linux/delay.h> 31 #include <linux/pm.h> 32 #include <linux/bitops.h> 33 #include <linux/platform_device.h> 34 #include <linux/jiffies.h> 35 #include <linux/debugfs.h> 36 #include <linux/pm_runtime.h> 37 #include <linux/regulator/consumer.h> 38 #include <linux/clk.h> 39 #include <linux/slab.h> 40 #include <sound/core.h> 41 #include <sound/pcm.h> 42 #include <sound/pcm_params.h> 43 #include <sound/soc.h> 44 #include <sound/initval.h> 45 46 #include <trace/events/asoc.h> 47 48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++; 49 50 /* dapm power sequences - make this per codec in the future */ 51 static int dapm_up_seq[] = { 52 [snd_soc_dapm_pre] = 0, 53 [snd_soc_dapm_supply] = 1, 54 [snd_soc_dapm_regulator_supply] = 1, 55 [snd_soc_dapm_clock_supply] = 1, 56 [snd_soc_dapm_micbias] = 2, 57 [snd_soc_dapm_dai_link] = 2, 58 [snd_soc_dapm_dai_in] = 3, 59 [snd_soc_dapm_dai_out] = 3, 60 [snd_soc_dapm_aif_in] = 3, 61 [snd_soc_dapm_aif_out] = 3, 62 [snd_soc_dapm_mic] = 4, 63 [snd_soc_dapm_mux] = 5, 64 [snd_soc_dapm_virt_mux] = 5, 65 [snd_soc_dapm_value_mux] = 5, 66 [snd_soc_dapm_dac] = 6, 67 [snd_soc_dapm_switch] = 7, 68 [snd_soc_dapm_mixer] = 7, 69 [snd_soc_dapm_mixer_named_ctl] = 7, 70 [snd_soc_dapm_pga] = 8, 71 [snd_soc_dapm_adc] = 9, 72 [snd_soc_dapm_out_drv] = 10, 73 [snd_soc_dapm_hp] = 10, 74 [snd_soc_dapm_spk] = 10, 75 [snd_soc_dapm_line] = 10, 76 [snd_soc_dapm_post] = 11, 77 }; 78 79 static int dapm_down_seq[] = { 80 [snd_soc_dapm_pre] = 0, 81 [snd_soc_dapm_adc] = 1, 82 [snd_soc_dapm_hp] = 2, 83 [snd_soc_dapm_spk] = 2, 84 [snd_soc_dapm_line] = 2, 85 [snd_soc_dapm_out_drv] = 2, 86 [snd_soc_dapm_pga] = 4, 87 [snd_soc_dapm_switch] = 5, 88 [snd_soc_dapm_mixer_named_ctl] = 5, 89 [snd_soc_dapm_mixer] = 5, 90 [snd_soc_dapm_dac] = 6, 91 [snd_soc_dapm_mic] = 7, 92 [snd_soc_dapm_micbias] = 8, 93 [snd_soc_dapm_mux] = 9, 94 [snd_soc_dapm_virt_mux] = 9, 95 [snd_soc_dapm_value_mux] = 9, 96 [snd_soc_dapm_aif_in] = 10, 97 [snd_soc_dapm_aif_out] = 10, 98 [snd_soc_dapm_dai_in] = 10, 99 [snd_soc_dapm_dai_out] = 10, 100 [snd_soc_dapm_dai_link] = 11, 101 [snd_soc_dapm_clock_supply] = 12, 102 [snd_soc_dapm_regulator_supply] = 12, 103 [snd_soc_dapm_supply] = 12, 104 [snd_soc_dapm_post] = 13, 105 }; 106 107 static void pop_wait(u32 pop_time) 108 { 109 if (pop_time) 110 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time)); 111 } 112 113 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...) 114 { 115 va_list args; 116 char *buf; 117 118 if (!pop_time) 119 return; 120 121 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 122 if (buf == NULL) 123 return; 124 125 va_start(args, fmt); 126 vsnprintf(buf, PAGE_SIZE, fmt, args); 127 dev_info(dev, "%s", buf); 128 va_end(args); 129 130 kfree(buf); 131 } 132 133 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w) 134 { 135 return !list_empty(&w->dirty); 136 } 137 138 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason) 139 { 140 if (!dapm_dirty_widget(w)) { 141 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n", 142 w->name, reason); 143 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty); 144 } 145 } 146 EXPORT_SYMBOL_GPL(dapm_mark_dirty); 147 148 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm) 149 { 150 struct snd_soc_card *card = dapm->card; 151 struct snd_soc_dapm_widget *w; 152 153 mutex_lock(&card->dapm_mutex); 154 155 list_for_each_entry(w, &card->widgets, list) { 156 switch (w->id) { 157 case snd_soc_dapm_input: 158 case snd_soc_dapm_output: 159 dapm_mark_dirty(w, "Rechecking inputs and outputs"); 160 break; 161 default: 162 break; 163 } 164 } 165 166 mutex_unlock(&card->dapm_mutex); 167 } 168 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty); 169 170 /* create a new dapm widget */ 171 static inline struct snd_soc_dapm_widget *dapm_cnew_widget( 172 const struct snd_soc_dapm_widget *_widget) 173 { 174 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL); 175 } 176 177 /* get snd_card from DAPM context */ 178 static inline struct snd_card *dapm_get_snd_card( 179 struct snd_soc_dapm_context *dapm) 180 { 181 if (dapm->codec) 182 return dapm->codec->card->snd_card; 183 else if (dapm->platform) 184 return dapm->platform->card->snd_card; 185 else 186 BUG(); 187 188 /* unreachable */ 189 return NULL; 190 } 191 192 /* get soc_card from DAPM context */ 193 static inline struct snd_soc_card *dapm_get_soc_card( 194 struct snd_soc_dapm_context *dapm) 195 { 196 if (dapm->codec) 197 return dapm->codec->card; 198 else if (dapm->platform) 199 return dapm->platform->card; 200 else 201 BUG(); 202 203 /* unreachable */ 204 return NULL; 205 } 206 207 static void dapm_reset(struct snd_soc_card *card) 208 { 209 struct snd_soc_dapm_widget *w; 210 211 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats)); 212 213 list_for_each_entry(w, &card->widgets, list) { 214 w->power_checked = false; 215 w->inputs = -1; 216 w->outputs = -1; 217 } 218 } 219 220 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg) 221 { 222 if (w->codec) 223 return snd_soc_read(w->codec, reg); 224 else if (w->platform) 225 return snd_soc_platform_read(w->platform, reg); 226 227 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n"); 228 return -1; 229 } 230 231 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val) 232 { 233 if (w->codec) 234 return snd_soc_write(w->codec, reg, val); 235 else if (w->platform) 236 return snd_soc_platform_write(w->platform, reg, val); 237 238 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n"); 239 return -1; 240 } 241 242 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w) 243 { 244 if (w->codec && !w->codec->using_regmap) 245 mutex_lock(&w->codec->mutex); 246 else if (w->platform) 247 mutex_lock(&w->platform->mutex); 248 } 249 250 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w) 251 { 252 if (w->codec && !w->codec->using_regmap) 253 mutex_unlock(&w->codec->mutex); 254 else if (w->platform) 255 mutex_unlock(&w->platform->mutex); 256 } 257 258 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w, 259 unsigned short reg, unsigned int mask, unsigned int value) 260 { 261 bool change; 262 unsigned int old, new; 263 int ret; 264 265 if (w->codec && w->codec->using_regmap) { 266 ret = regmap_update_bits_check(w->codec->control_data, 267 reg, mask, value, &change); 268 if (ret != 0) 269 return ret; 270 } else { 271 soc_widget_lock(w); 272 ret = soc_widget_read(w, reg); 273 if (ret < 0) { 274 soc_widget_unlock(w); 275 return ret; 276 } 277 278 old = ret; 279 new = (old & ~mask) | (value & mask); 280 change = old != new; 281 if (change) { 282 ret = soc_widget_write(w, reg, new); 283 if (ret < 0) { 284 soc_widget_unlock(w); 285 return ret; 286 } 287 } 288 soc_widget_unlock(w); 289 } 290 291 return change; 292 } 293 294 /** 295 * snd_soc_dapm_set_bias_level - set the bias level for the system 296 * @dapm: DAPM context 297 * @level: level to configure 298 * 299 * Configure the bias (power) levels for the SoC audio device. 300 * 301 * Returns 0 for success else error. 302 */ 303 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm, 304 enum snd_soc_bias_level level) 305 { 306 struct snd_soc_card *card = dapm->card; 307 int ret = 0; 308 309 trace_snd_soc_bias_level_start(card, level); 310 311 if (card && card->set_bias_level) 312 ret = card->set_bias_level(card, dapm, level); 313 if (ret != 0) 314 goto out; 315 316 if (dapm->codec) { 317 if (dapm->codec->driver->set_bias_level) 318 ret = dapm->codec->driver->set_bias_level(dapm->codec, 319 level); 320 else 321 dapm->bias_level = level; 322 } else if (!card || dapm != &card->dapm) { 323 dapm->bias_level = level; 324 } 325 326 if (ret != 0) 327 goto out; 328 329 if (card && card->set_bias_level_post) 330 ret = card->set_bias_level_post(card, dapm, level); 331 out: 332 trace_snd_soc_bias_level_done(card, level); 333 334 return ret; 335 } 336 337 /* set up initial codec paths */ 338 static void dapm_set_path_status(struct snd_soc_dapm_widget *w, 339 struct snd_soc_dapm_path *p, int i) 340 { 341 switch (w->id) { 342 case snd_soc_dapm_switch: 343 case snd_soc_dapm_mixer: 344 case snd_soc_dapm_mixer_named_ctl: { 345 int val; 346 struct soc_mixer_control *mc = (struct soc_mixer_control *) 347 w->kcontrol_news[i].private_value; 348 unsigned int reg = mc->reg; 349 unsigned int shift = mc->shift; 350 int max = mc->max; 351 unsigned int mask = (1 << fls(max)) - 1; 352 unsigned int invert = mc->invert; 353 354 val = soc_widget_read(w, reg); 355 val = (val >> shift) & mask; 356 if (invert) 357 val = max - val; 358 359 p->connect = !!val; 360 } 361 break; 362 case snd_soc_dapm_mux: { 363 struct soc_enum *e = (struct soc_enum *) 364 w->kcontrol_news[i].private_value; 365 int val, item; 366 367 val = soc_widget_read(w, e->reg); 368 item = (val >> e->shift_l) & e->mask; 369 370 if (item < e->max && !strcmp(p->name, e->texts[item])) 371 p->connect = 1; 372 else 373 p->connect = 0; 374 } 375 break; 376 case snd_soc_dapm_virt_mux: { 377 struct soc_enum *e = (struct soc_enum *) 378 w->kcontrol_news[i].private_value; 379 380 p->connect = 0; 381 /* since a virtual mux has no backing registers to 382 * decide which path to connect, it will try to match 383 * with the first enumeration. This is to ensure 384 * that the default mux choice (the first) will be 385 * correctly powered up during initialization. 386 */ 387 if (!strcmp(p->name, e->texts[0])) 388 p->connect = 1; 389 } 390 break; 391 case snd_soc_dapm_value_mux: { 392 struct soc_enum *e = (struct soc_enum *) 393 w->kcontrol_news[i].private_value; 394 int val, item; 395 396 val = soc_widget_read(w, e->reg); 397 val = (val >> e->shift_l) & e->mask; 398 for (item = 0; item < e->max; item++) { 399 if (val == e->values[item]) 400 break; 401 } 402 403 if (item < e->max && !strcmp(p->name, e->texts[item])) 404 p->connect = 1; 405 else 406 p->connect = 0; 407 } 408 break; 409 /* does not affect routing - always connected */ 410 case snd_soc_dapm_pga: 411 case snd_soc_dapm_out_drv: 412 case snd_soc_dapm_output: 413 case snd_soc_dapm_adc: 414 case snd_soc_dapm_input: 415 case snd_soc_dapm_siggen: 416 case snd_soc_dapm_dac: 417 case snd_soc_dapm_micbias: 418 case snd_soc_dapm_vmid: 419 case snd_soc_dapm_supply: 420 case snd_soc_dapm_regulator_supply: 421 case snd_soc_dapm_clock_supply: 422 case snd_soc_dapm_aif_in: 423 case snd_soc_dapm_aif_out: 424 case snd_soc_dapm_dai_in: 425 case snd_soc_dapm_dai_out: 426 case snd_soc_dapm_hp: 427 case snd_soc_dapm_mic: 428 case snd_soc_dapm_spk: 429 case snd_soc_dapm_line: 430 case snd_soc_dapm_dai_link: 431 p->connect = 1; 432 break; 433 /* does affect routing - dynamically connected */ 434 case snd_soc_dapm_pre: 435 case snd_soc_dapm_post: 436 p->connect = 0; 437 break; 438 } 439 } 440 441 /* connect mux widget to its interconnecting audio paths */ 442 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm, 443 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest, 444 struct snd_soc_dapm_path *path, const char *control_name, 445 const struct snd_kcontrol_new *kcontrol) 446 { 447 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; 448 int i; 449 450 for (i = 0; i < e->max; i++) { 451 if (!(strcmp(control_name, e->texts[i]))) { 452 list_add(&path->list, &dapm->card->paths); 453 list_add(&path->list_sink, &dest->sources); 454 list_add(&path->list_source, &src->sinks); 455 path->name = (char*)e->texts[i]; 456 dapm_set_path_status(dest, path, 0); 457 return 0; 458 } 459 } 460 461 return -ENODEV; 462 } 463 464 /* connect mixer widget to its interconnecting audio paths */ 465 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm, 466 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest, 467 struct snd_soc_dapm_path *path, const char *control_name) 468 { 469 int i; 470 471 /* search for mixer kcontrol */ 472 for (i = 0; i < dest->num_kcontrols; i++) { 473 if (!strcmp(control_name, dest->kcontrol_news[i].name)) { 474 list_add(&path->list, &dapm->card->paths); 475 list_add(&path->list_sink, &dest->sources); 476 list_add(&path->list_source, &src->sinks); 477 path->name = dest->kcontrol_news[i].name; 478 dapm_set_path_status(dest, path, i); 479 return 0; 480 } 481 } 482 return -ENODEV; 483 } 484 485 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm, 486 struct snd_soc_dapm_widget *kcontrolw, 487 const struct snd_kcontrol_new *kcontrol_new, 488 struct snd_kcontrol **kcontrol) 489 { 490 struct snd_soc_dapm_widget *w; 491 int i; 492 493 *kcontrol = NULL; 494 495 list_for_each_entry(w, &dapm->card->widgets, list) { 496 if (w == kcontrolw || w->dapm != kcontrolw->dapm) 497 continue; 498 for (i = 0; i < w->num_kcontrols; i++) { 499 if (&w->kcontrol_news[i] == kcontrol_new) { 500 if (w->kcontrols) 501 *kcontrol = w->kcontrols[i]; 502 return 1; 503 } 504 } 505 } 506 507 return 0; 508 } 509 510 static void dapm_kcontrol_free(struct snd_kcontrol *kctl) 511 { 512 kfree(kctl->private_data); 513 } 514 515 /* 516 * Determine if a kcontrol is shared. If it is, look it up. If it isn't, 517 * create it. Either way, add the widget into the control's widget list 518 */ 519 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w, 520 int kci, struct snd_soc_dapm_path *path) 521 { 522 struct snd_soc_dapm_context *dapm = w->dapm; 523 struct snd_card *card = dapm->card->snd_card; 524 const char *prefix; 525 size_t prefix_len; 526 int shared; 527 struct snd_kcontrol *kcontrol; 528 struct snd_soc_dapm_widget_list *wlist; 529 int wlistentries; 530 size_t wlistsize; 531 bool wname_in_long_name, kcname_in_long_name; 532 char *long_name; 533 const char *name; 534 int ret; 535 536 if (dapm->codec) 537 prefix = dapm->codec->name_prefix; 538 else 539 prefix = NULL; 540 541 if (prefix) 542 prefix_len = strlen(prefix) + 1; 543 else 544 prefix_len = 0; 545 546 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci], 547 &kcontrol); 548 549 if (kcontrol) { 550 wlist = kcontrol->private_data; 551 wlistentries = wlist->num_widgets + 1; 552 } else { 553 wlist = NULL; 554 wlistentries = 1; 555 } 556 557 wlistsize = sizeof(struct snd_soc_dapm_widget_list) + 558 wlistentries * sizeof(struct snd_soc_dapm_widget *); 559 wlist = krealloc(wlist, wlistsize, GFP_KERNEL); 560 if (wlist == NULL) { 561 dev_err(dapm->dev, "ASoC: can't allocate widget list for %s\n", 562 w->name); 563 return -ENOMEM; 564 } 565 wlist->num_widgets = wlistentries; 566 wlist->widgets[wlistentries - 1] = w; 567 568 if (!kcontrol) { 569 if (shared) { 570 wname_in_long_name = false; 571 kcname_in_long_name = true; 572 } else { 573 switch (w->id) { 574 case snd_soc_dapm_switch: 575 case snd_soc_dapm_mixer: 576 wname_in_long_name = true; 577 kcname_in_long_name = true; 578 break; 579 case snd_soc_dapm_mixer_named_ctl: 580 wname_in_long_name = false; 581 kcname_in_long_name = true; 582 break; 583 case snd_soc_dapm_mux: 584 case snd_soc_dapm_virt_mux: 585 case snd_soc_dapm_value_mux: 586 wname_in_long_name = true; 587 kcname_in_long_name = false; 588 break; 589 default: 590 kfree(wlist); 591 return -EINVAL; 592 } 593 } 594 595 if (wname_in_long_name && kcname_in_long_name) { 596 /* 597 * The control will get a prefix from the control 598 * creation process but we're also using the same 599 * prefix for widgets so cut the prefix off the 600 * front of the widget name. 601 */ 602 long_name = kasprintf(GFP_KERNEL, "%s %s", 603 w->name + prefix_len, 604 w->kcontrol_news[kci].name); 605 if (long_name == NULL) { 606 kfree(wlist); 607 return -ENOMEM; 608 } 609 610 name = long_name; 611 } else if (wname_in_long_name) { 612 long_name = NULL; 613 name = w->name + prefix_len; 614 } else { 615 long_name = NULL; 616 name = w->kcontrol_news[kci].name; 617 } 618 619 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], wlist, name, 620 prefix); 621 kcontrol->private_free = dapm_kcontrol_free; 622 kfree(long_name); 623 ret = snd_ctl_add(card, kcontrol); 624 if (ret < 0) { 625 dev_err(dapm->dev, 626 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n", 627 w->name, name, ret); 628 kfree(wlist); 629 return ret; 630 } 631 } 632 633 kcontrol->private_data = wlist; 634 w->kcontrols[kci] = kcontrol; 635 path->kcontrol = kcontrol; 636 637 return 0; 638 } 639 640 /* create new dapm mixer control */ 641 static int dapm_new_mixer(struct snd_soc_dapm_widget *w) 642 { 643 int i, ret; 644 struct snd_soc_dapm_path *path; 645 646 /* add kcontrol */ 647 for (i = 0; i < w->num_kcontrols; i++) { 648 /* match name */ 649 list_for_each_entry(path, &w->sources, list_sink) { 650 /* mixer/mux paths name must match control name */ 651 if (path->name != (char *)w->kcontrol_news[i].name) 652 continue; 653 654 if (w->kcontrols[i]) { 655 path->kcontrol = w->kcontrols[i]; 656 continue; 657 } 658 659 ret = dapm_create_or_share_mixmux_kcontrol(w, i, path); 660 if (ret < 0) 661 return ret; 662 } 663 } 664 665 return 0; 666 } 667 668 /* create new dapm mux control */ 669 static int dapm_new_mux(struct snd_soc_dapm_widget *w) 670 { 671 struct snd_soc_dapm_context *dapm = w->dapm; 672 struct snd_soc_dapm_path *path; 673 int ret; 674 675 if (w->num_kcontrols != 1) { 676 dev_err(dapm->dev, 677 "ASoC: mux %s has incorrect number of controls\n", 678 w->name); 679 return -EINVAL; 680 } 681 682 if (list_empty(&w->sources)) { 683 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name); 684 return -EINVAL; 685 } 686 687 path = list_first_entry(&w->sources, struct snd_soc_dapm_path, 688 list_sink); 689 690 ret = dapm_create_or_share_mixmux_kcontrol(w, 0, path); 691 if (ret < 0) 692 return ret; 693 694 list_for_each_entry(path, &w->sources, list_sink) 695 path->kcontrol = w->kcontrols[0]; 696 697 return 0; 698 } 699 700 /* create new dapm volume control */ 701 static int dapm_new_pga(struct snd_soc_dapm_widget *w) 702 { 703 if (w->num_kcontrols) 704 dev_err(w->dapm->dev, 705 "ASoC: PGA controls not supported: '%s'\n", w->name); 706 707 return 0; 708 } 709 710 /* reset 'walked' bit for each dapm path */ 711 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm, 712 struct list_head *sink) 713 { 714 struct snd_soc_dapm_path *p; 715 716 list_for_each_entry(p, sink, list_source) { 717 if (p->walked) { 718 p->walked = 0; 719 dapm_clear_walk_output(dapm, &p->sink->sinks); 720 } 721 } 722 } 723 724 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm, 725 struct list_head *source) 726 { 727 struct snd_soc_dapm_path *p; 728 729 list_for_each_entry(p, source, list_sink) { 730 if (p->walked) { 731 p->walked = 0; 732 dapm_clear_walk_input(dapm, &p->source->sources); 733 } 734 } 735 } 736 737 738 /* We implement power down on suspend by checking the power state of 739 * the ALSA card - when we are suspending the ALSA state for the card 740 * is set to D3. 741 */ 742 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget) 743 { 744 int level = snd_power_get_state(widget->dapm->card->snd_card); 745 746 switch (level) { 747 case SNDRV_CTL_POWER_D3hot: 748 case SNDRV_CTL_POWER_D3cold: 749 if (widget->ignore_suspend) 750 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n", 751 widget->name); 752 return widget->ignore_suspend; 753 default: 754 return 1; 755 } 756 } 757 758 /* add widget to list if it's not already in the list */ 759 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list, 760 struct snd_soc_dapm_widget *w) 761 { 762 struct snd_soc_dapm_widget_list *wlist; 763 int wlistsize, wlistentries, i; 764 765 if (*list == NULL) 766 return -EINVAL; 767 768 wlist = *list; 769 770 /* is this widget already in the list */ 771 for (i = 0; i < wlist->num_widgets; i++) { 772 if (wlist->widgets[i] == w) 773 return 0; 774 } 775 776 /* allocate some new space */ 777 wlistentries = wlist->num_widgets + 1; 778 wlistsize = sizeof(struct snd_soc_dapm_widget_list) + 779 wlistentries * sizeof(struct snd_soc_dapm_widget *); 780 *list = krealloc(wlist, wlistsize, GFP_KERNEL); 781 if (*list == NULL) { 782 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n", 783 w->name); 784 return -ENOMEM; 785 } 786 wlist = *list; 787 788 /* insert the widget */ 789 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n", 790 w->name, wlist->num_widgets); 791 792 wlist->widgets[wlist->num_widgets] = w; 793 wlist->num_widgets++; 794 return 1; 795 } 796 797 /* 798 * Recursively check for a completed path to an active or physically connected 799 * output widget. Returns number of complete paths. 800 */ 801 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget, 802 struct snd_soc_dapm_widget_list **list) 803 { 804 struct snd_soc_dapm_path *path; 805 int con = 0; 806 807 if (widget->outputs >= 0) 808 return widget->outputs; 809 810 DAPM_UPDATE_STAT(widget, path_checks); 811 812 switch (widget->id) { 813 case snd_soc_dapm_supply: 814 case snd_soc_dapm_regulator_supply: 815 case snd_soc_dapm_clock_supply: 816 return 0; 817 default: 818 break; 819 } 820 821 switch (widget->id) { 822 case snd_soc_dapm_adc: 823 case snd_soc_dapm_aif_out: 824 case snd_soc_dapm_dai_out: 825 if (widget->active) { 826 widget->outputs = snd_soc_dapm_suspend_check(widget); 827 return widget->outputs; 828 } 829 default: 830 break; 831 } 832 833 if (widget->connected) { 834 /* connected pin ? */ 835 if (widget->id == snd_soc_dapm_output && !widget->ext) { 836 widget->outputs = snd_soc_dapm_suspend_check(widget); 837 return widget->outputs; 838 } 839 840 /* connected jack or spk ? */ 841 if (widget->id == snd_soc_dapm_hp || 842 widget->id == snd_soc_dapm_spk || 843 (widget->id == snd_soc_dapm_line && 844 !list_empty(&widget->sources))) { 845 widget->outputs = snd_soc_dapm_suspend_check(widget); 846 return widget->outputs; 847 } 848 } 849 850 list_for_each_entry(path, &widget->sinks, list_source) { 851 DAPM_UPDATE_STAT(widget, neighbour_checks); 852 853 if (path->weak) 854 continue; 855 856 if (path->walking) 857 return 1; 858 859 if (path->walked) 860 continue; 861 862 trace_snd_soc_dapm_output_path(widget, path); 863 864 if (path->sink && path->connect) { 865 path->walked = 1; 866 path->walking = 1; 867 868 /* do we need to add this widget to the list ? */ 869 if (list) { 870 int err; 871 err = dapm_list_add_widget(list, path->sink); 872 if (err < 0) { 873 dev_err(widget->dapm->dev, 874 "ASoC: could not add widget %s\n", 875 widget->name); 876 path->walking = 0; 877 return con; 878 } 879 } 880 881 con += is_connected_output_ep(path->sink, list); 882 883 path->walking = 0; 884 } 885 } 886 887 widget->outputs = con; 888 889 return con; 890 } 891 892 /* 893 * Recursively check for a completed path to an active or physically connected 894 * input widget. Returns number of complete paths. 895 */ 896 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget, 897 struct snd_soc_dapm_widget_list **list) 898 { 899 struct snd_soc_dapm_path *path; 900 int con = 0; 901 902 if (widget->inputs >= 0) 903 return widget->inputs; 904 905 DAPM_UPDATE_STAT(widget, path_checks); 906 907 switch (widget->id) { 908 case snd_soc_dapm_supply: 909 case snd_soc_dapm_regulator_supply: 910 case snd_soc_dapm_clock_supply: 911 return 0; 912 default: 913 break; 914 } 915 916 /* active stream ? */ 917 switch (widget->id) { 918 case snd_soc_dapm_dac: 919 case snd_soc_dapm_aif_in: 920 case snd_soc_dapm_dai_in: 921 if (widget->active) { 922 widget->inputs = snd_soc_dapm_suspend_check(widget); 923 return widget->inputs; 924 } 925 default: 926 break; 927 } 928 929 if (widget->connected) { 930 /* connected pin ? */ 931 if (widget->id == snd_soc_dapm_input && !widget->ext) { 932 widget->inputs = snd_soc_dapm_suspend_check(widget); 933 return widget->inputs; 934 } 935 936 /* connected VMID/Bias for lower pops */ 937 if (widget->id == snd_soc_dapm_vmid) { 938 widget->inputs = snd_soc_dapm_suspend_check(widget); 939 return widget->inputs; 940 } 941 942 /* connected jack ? */ 943 if (widget->id == snd_soc_dapm_mic || 944 (widget->id == snd_soc_dapm_line && 945 !list_empty(&widget->sinks))) { 946 widget->inputs = snd_soc_dapm_suspend_check(widget); 947 return widget->inputs; 948 } 949 950 /* signal generator */ 951 if (widget->id == snd_soc_dapm_siggen) { 952 widget->inputs = snd_soc_dapm_suspend_check(widget); 953 return widget->inputs; 954 } 955 } 956 957 list_for_each_entry(path, &widget->sources, list_sink) { 958 DAPM_UPDATE_STAT(widget, neighbour_checks); 959 960 if (path->weak) 961 continue; 962 963 if (path->walking) 964 return 1; 965 966 if (path->walked) 967 continue; 968 969 trace_snd_soc_dapm_input_path(widget, path); 970 971 if (path->source && path->connect) { 972 path->walked = 1; 973 path->walking = 1; 974 975 /* do we need to add this widget to the list ? */ 976 if (list) { 977 int err; 978 err = dapm_list_add_widget(list, path->source); 979 if (err < 0) { 980 dev_err(widget->dapm->dev, 981 "ASoC: could not add widget %s\n", 982 widget->name); 983 path->walking = 0; 984 return con; 985 } 986 } 987 988 con += is_connected_input_ep(path->source, list); 989 990 path->walking = 0; 991 } 992 } 993 994 widget->inputs = con; 995 996 return con; 997 } 998 999 /** 1000 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets. 1001 * @dai: the soc DAI. 1002 * @stream: stream direction. 1003 * @list: list of active widgets for this stream. 1004 * 1005 * Queries DAPM graph as to whether an valid audio stream path exists for 1006 * the initial stream specified by name. This takes into account 1007 * current mixer and mux kcontrol settings. Creates list of valid widgets. 1008 * 1009 * Returns the number of valid paths or negative error. 1010 */ 1011 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream, 1012 struct snd_soc_dapm_widget_list **list) 1013 { 1014 struct snd_soc_card *card = dai->card; 1015 int paths; 1016 1017 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 1018 dapm_reset(card); 1019 1020 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 1021 paths = is_connected_output_ep(dai->playback_widget, list); 1022 dapm_clear_walk_output(&card->dapm, 1023 &dai->playback_widget->sinks); 1024 } else { 1025 paths = is_connected_input_ep(dai->capture_widget, list); 1026 dapm_clear_walk_input(&card->dapm, 1027 &dai->capture_widget->sources); 1028 } 1029 1030 trace_snd_soc_dapm_connected(paths, stream); 1031 mutex_unlock(&card->dapm_mutex); 1032 1033 return paths; 1034 } 1035 1036 /* 1037 * Handler for generic register modifier widget. 1038 */ 1039 int dapm_reg_event(struct snd_soc_dapm_widget *w, 1040 struct snd_kcontrol *kcontrol, int event) 1041 { 1042 unsigned int val; 1043 1044 if (SND_SOC_DAPM_EVENT_ON(event)) 1045 val = w->on_val; 1046 else 1047 val = w->off_val; 1048 1049 soc_widget_update_bits_locked(w, -(w->reg + 1), 1050 w->mask << w->shift, val << w->shift); 1051 1052 return 0; 1053 } 1054 EXPORT_SYMBOL_GPL(dapm_reg_event); 1055 1056 /* 1057 * Handler for regulator supply widget. 1058 */ 1059 int dapm_regulator_event(struct snd_soc_dapm_widget *w, 1060 struct snd_kcontrol *kcontrol, int event) 1061 { 1062 int ret; 1063 1064 if (SND_SOC_DAPM_EVENT_ON(event)) { 1065 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) { 1066 ret = regulator_allow_bypass(w->regulator, false); 1067 if (ret != 0) 1068 dev_warn(w->dapm->dev, 1069 "ASoC: Failed to bypass %s: %d\n", 1070 w->name, ret); 1071 } 1072 1073 return regulator_enable(w->regulator); 1074 } else { 1075 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) { 1076 ret = regulator_allow_bypass(w->regulator, true); 1077 if (ret != 0) 1078 dev_warn(w->dapm->dev, 1079 "ASoC: Failed to unbypass %s: %d\n", 1080 w->name, ret); 1081 } 1082 1083 return regulator_disable_deferred(w->regulator, w->shift); 1084 } 1085 } 1086 EXPORT_SYMBOL_GPL(dapm_regulator_event); 1087 1088 /* 1089 * Handler for clock supply widget. 1090 */ 1091 int dapm_clock_event(struct snd_soc_dapm_widget *w, 1092 struct snd_kcontrol *kcontrol, int event) 1093 { 1094 if (!w->clk) 1095 return -EIO; 1096 1097 #ifdef CONFIG_HAVE_CLK 1098 if (SND_SOC_DAPM_EVENT_ON(event)) { 1099 return clk_prepare_enable(w->clk); 1100 } else { 1101 clk_disable_unprepare(w->clk); 1102 return 0; 1103 } 1104 #endif 1105 return 0; 1106 } 1107 EXPORT_SYMBOL_GPL(dapm_clock_event); 1108 1109 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w) 1110 { 1111 if (w->power_checked) 1112 return w->new_power; 1113 1114 if (w->force) 1115 w->new_power = 1; 1116 else 1117 w->new_power = w->power_check(w); 1118 1119 w->power_checked = true; 1120 1121 return w->new_power; 1122 } 1123 1124 /* Generic check to see if a widget should be powered. 1125 */ 1126 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w) 1127 { 1128 int in, out; 1129 1130 DAPM_UPDATE_STAT(w, power_checks); 1131 1132 in = is_connected_input_ep(w, NULL); 1133 dapm_clear_walk_input(w->dapm, &w->sources); 1134 out = is_connected_output_ep(w, NULL); 1135 dapm_clear_walk_output(w->dapm, &w->sinks); 1136 return out != 0 && in != 0; 1137 } 1138 1139 /* Check to see if an ADC has power */ 1140 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w) 1141 { 1142 int in; 1143 1144 DAPM_UPDATE_STAT(w, power_checks); 1145 1146 if (w->active) { 1147 in = is_connected_input_ep(w, NULL); 1148 dapm_clear_walk_input(w->dapm, &w->sources); 1149 return in != 0; 1150 } else { 1151 return dapm_generic_check_power(w); 1152 } 1153 } 1154 1155 /* Check to see if a DAC has power */ 1156 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w) 1157 { 1158 int out; 1159 1160 DAPM_UPDATE_STAT(w, power_checks); 1161 1162 if (w->active) { 1163 out = is_connected_output_ep(w, NULL); 1164 dapm_clear_walk_output(w->dapm, &w->sinks); 1165 return out != 0; 1166 } else { 1167 return dapm_generic_check_power(w); 1168 } 1169 } 1170 1171 /* Check to see if a power supply is needed */ 1172 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w) 1173 { 1174 struct snd_soc_dapm_path *path; 1175 1176 DAPM_UPDATE_STAT(w, power_checks); 1177 1178 /* Check if one of our outputs is connected */ 1179 list_for_each_entry(path, &w->sinks, list_source) { 1180 DAPM_UPDATE_STAT(w, neighbour_checks); 1181 1182 if (path->weak) 1183 continue; 1184 1185 if (path->connected && 1186 !path->connected(path->source, path->sink)) 1187 continue; 1188 1189 if (!path->sink) 1190 continue; 1191 1192 if (dapm_widget_power_check(path->sink)) 1193 return 1; 1194 } 1195 1196 return 0; 1197 } 1198 1199 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w) 1200 { 1201 return 1; 1202 } 1203 1204 static int dapm_seq_compare(struct snd_soc_dapm_widget *a, 1205 struct snd_soc_dapm_widget *b, 1206 bool power_up) 1207 { 1208 int *sort; 1209 1210 if (power_up) 1211 sort = dapm_up_seq; 1212 else 1213 sort = dapm_down_seq; 1214 1215 if (sort[a->id] != sort[b->id]) 1216 return sort[a->id] - sort[b->id]; 1217 if (a->subseq != b->subseq) { 1218 if (power_up) 1219 return a->subseq - b->subseq; 1220 else 1221 return b->subseq - a->subseq; 1222 } 1223 if (a->reg != b->reg) 1224 return a->reg - b->reg; 1225 if (a->dapm != b->dapm) 1226 return (unsigned long)a->dapm - (unsigned long)b->dapm; 1227 1228 return 0; 1229 } 1230 1231 /* Insert a widget in order into a DAPM power sequence. */ 1232 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget, 1233 struct list_head *list, 1234 bool power_up) 1235 { 1236 struct snd_soc_dapm_widget *w; 1237 1238 list_for_each_entry(w, list, power_list) 1239 if (dapm_seq_compare(new_widget, w, power_up) < 0) { 1240 list_add_tail(&new_widget->power_list, &w->power_list); 1241 return; 1242 } 1243 1244 list_add_tail(&new_widget->power_list, list); 1245 } 1246 1247 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm, 1248 struct snd_soc_dapm_widget *w, int event) 1249 { 1250 struct snd_soc_card *card = dapm->card; 1251 const char *ev_name; 1252 int power, ret; 1253 1254 switch (event) { 1255 case SND_SOC_DAPM_PRE_PMU: 1256 ev_name = "PRE_PMU"; 1257 power = 1; 1258 break; 1259 case SND_SOC_DAPM_POST_PMU: 1260 ev_name = "POST_PMU"; 1261 power = 1; 1262 break; 1263 case SND_SOC_DAPM_PRE_PMD: 1264 ev_name = "PRE_PMD"; 1265 power = 0; 1266 break; 1267 case SND_SOC_DAPM_POST_PMD: 1268 ev_name = "POST_PMD"; 1269 power = 0; 1270 break; 1271 case SND_SOC_DAPM_WILL_PMU: 1272 ev_name = "WILL_PMU"; 1273 power = 1; 1274 break; 1275 case SND_SOC_DAPM_WILL_PMD: 1276 ev_name = "WILL_PMD"; 1277 power = 0; 1278 break; 1279 default: 1280 BUG(); 1281 return; 1282 } 1283 1284 if (w->power != power) 1285 return; 1286 1287 if (w->event && (w->event_flags & event)) { 1288 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n", 1289 w->name, ev_name); 1290 trace_snd_soc_dapm_widget_event_start(w, event); 1291 ret = w->event(w, NULL, event); 1292 trace_snd_soc_dapm_widget_event_done(w, event); 1293 if (ret < 0) 1294 dev_err(dapm->dev, "ASoC: %s: %s event failed: %d\n", 1295 ev_name, w->name, ret); 1296 } 1297 } 1298 1299 /* Apply the coalesced changes from a DAPM sequence */ 1300 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm, 1301 struct list_head *pending) 1302 { 1303 struct snd_soc_card *card = dapm->card; 1304 struct snd_soc_dapm_widget *w; 1305 int reg, power; 1306 unsigned int value = 0; 1307 unsigned int mask = 0; 1308 unsigned int cur_mask; 1309 1310 reg = list_first_entry(pending, struct snd_soc_dapm_widget, 1311 power_list)->reg; 1312 1313 list_for_each_entry(w, pending, power_list) { 1314 cur_mask = 1 << w->shift; 1315 BUG_ON(reg != w->reg); 1316 1317 if (w->invert) 1318 power = !w->power; 1319 else 1320 power = w->power; 1321 1322 mask |= cur_mask; 1323 if (power) 1324 value |= cur_mask; 1325 1326 pop_dbg(dapm->dev, card->pop_time, 1327 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n", 1328 w->name, reg, value, mask); 1329 1330 /* Check for events */ 1331 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU); 1332 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD); 1333 } 1334 1335 if (reg >= 0) { 1336 /* Any widget will do, they should all be updating the 1337 * same register. 1338 */ 1339 w = list_first_entry(pending, struct snd_soc_dapm_widget, 1340 power_list); 1341 1342 pop_dbg(dapm->dev, card->pop_time, 1343 "pop test : Applying 0x%x/0x%x to %x in %dms\n", 1344 value, mask, reg, card->pop_time); 1345 pop_wait(card->pop_time); 1346 soc_widget_update_bits_locked(w, reg, mask, value); 1347 } 1348 1349 list_for_each_entry(w, pending, power_list) { 1350 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU); 1351 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD); 1352 } 1353 } 1354 1355 /* Apply a DAPM power sequence. 1356 * 1357 * We walk over a pre-sorted list of widgets to apply power to. In 1358 * order to minimise the number of writes to the device required 1359 * multiple widgets will be updated in a single write where possible. 1360 * Currently anything that requires more than a single write is not 1361 * handled. 1362 */ 1363 static void dapm_seq_run(struct snd_soc_dapm_context *dapm, 1364 struct list_head *list, int event, bool power_up) 1365 { 1366 struct snd_soc_dapm_widget *w, *n; 1367 LIST_HEAD(pending); 1368 int cur_sort = -1; 1369 int cur_subseq = -1; 1370 int cur_reg = SND_SOC_NOPM; 1371 struct snd_soc_dapm_context *cur_dapm = NULL; 1372 int ret, i; 1373 int *sort; 1374 1375 if (power_up) 1376 sort = dapm_up_seq; 1377 else 1378 sort = dapm_down_seq; 1379 1380 list_for_each_entry_safe(w, n, list, power_list) { 1381 ret = 0; 1382 1383 /* Do we need to apply any queued changes? */ 1384 if (sort[w->id] != cur_sort || w->reg != cur_reg || 1385 w->dapm != cur_dapm || w->subseq != cur_subseq) { 1386 if (!list_empty(&pending)) 1387 dapm_seq_run_coalesced(cur_dapm, &pending); 1388 1389 if (cur_dapm && cur_dapm->seq_notifier) { 1390 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++) 1391 if (sort[i] == cur_sort) 1392 cur_dapm->seq_notifier(cur_dapm, 1393 i, 1394 cur_subseq); 1395 } 1396 1397 INIT_LIST_HEAD(&pending); 1398 cur_sort = -1; 1399 cur_subseq = INT_MIN; 1400 cur_reg = SND_SOC_NOPM; 1401 cur_dapm = NULL; 1402 } 1403 1404 switch (w->id) { 1405 case snd_soc_dapm_pre: 1406 if (!w->event) 1407 list_for_each_entry_safe_continue(w, n, list, 1408 power_list); 1409 1410 if (event == SND_SOC_DAPM_STREAM_START) 1411 ret = w->event(w, 1412 NULL, SND_SOC_DAPM_PRE_PMU); 1413 else if (event == SND_SOC_DAPM_STREAM_STOP) 1414 ret = w->event(w, 1415 NULL, SND_SOC_DAPM_PRE_PMD); 1416 break; 1417 1418 case snd_soc_dapm_post: 1419 if (!w->event) 1420 list_for_each_entry_safe_continue(w, n, list, 1421 power_list); 1422 1423 if (event == SND_SOC_DAPM_STREAM_START) 1424 ret = w->event(w, 1425 NULL, SND_SOC_DAPM_POST_PMU); 1426 else if (event == SND_SOC_DAPM_STREAM_STOP) 1427 ret = w->event(w, 1428 NULL, SND_SOC_DAPM_POST_PMD); 1429 break; 1430 1431 default: 1432 /* Queue it up for application */ 1433 cur_sort = sort[w->id]; 1434 cur_subseq = w->subseq; 1435 cur_reg = w->reg; 1436 cur_dapm = w->dapm; 1437 list_move(&w->power_list, &pending); 1438 break; 1439 } 1440 1441 if (ret < 0) 1442 dev_err(w->dapm->dev, 1443 "ASoC: Failed to apply widget power: %d\n", ret); 1444 } 1445 1446 if (!list_empty(&pending)) 1447 dapm_seq_run_coalesced(cur_dapm, &pending); 1448 1449 if (cur_dapm && cur_dapm->seq_notifier) { 1450 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++) 1451 if (sort[i] == cur_sort) 1452 cur_dapm->seq_notifier(cur_dapm, 1453 i, cur_subseq); 1454 } 1455 } 1456 1457 static void dapm_widget_update(struct snd_soc_dapm_context *dapm) 1458 { 1459 struct snd_soc_dapm_update *update = dapm->update; 1460 struct snd_soc_dapm_widget *w; 1461 int ret; 1462 1463 if (!update) 1464 return; 1465 1466 w = update->widget; 1467 1468 if (w->event && 1469 (w->event_flags & SND_SOC_DAPM_PRE_REG)) { 1470 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG); 1471 if (ret != 0) 1472 dev_err(dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n", 1473 w->name, ret); 1474 } 1475 1476 ret = soc_widget_update_bits_locked(w, update->reg, update->mask, 1477 update->val); 1478 if (ret < 0) 1479 dev_err(dapm->dev, "ASoC: %s DAPM update failed: %d\n", 1480 w->name, ret); 1481 1482 if (w->event && 1483 (w->event_flags & SND_SOC_DAPM_POST_REG)) { 1484 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG); 1485 if (ret != 0) 1486 dev_err(dapm->dev, "ASoC: %s DAPM post-event failed: %d\n", 1487 w->name, ret); 1488 } 1489 } 1490 1491 /* Async callback run prior to DAPM sequences - brings to _PREPARE if 1492 * they're changing state. 1493 */ 1494 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie) 1495 { 1496 struct snd_soc_dapm_context *d = data; 1497 int ret; 1498 1499 /* If we're off and we're not supposed to be go into STANDBY */ 1500 if (d->bias_level == SND_SOC_BIAS_OFF && 1501 d->target_bias_level != SND_SOC_BIAS_OFF) { 1502 if (d->dev) 1503 pm_runtime_get_sync(d->dev); 1504 1505 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY); 1506 if (ret != 0) 1507 dev_err(d->dev, 1508 "ASoC: Failed to turn on bias: %d\n", ret); 1509 } 1510 1511 /* Prepare for a STADDBY->ON or ON->STANDBY transition */ 1512 if (d->bias_level != d->target_bias_level) { 1513 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE); 1514 if (ret != 0) 1515 dev_err(d->dev, 1516 "ASoC: Failed to prepare bias: %d\n", ret); 1517 } 1518 } 1519 1520 /* Async callback run prior to DAPM sequences - brings to their final 1521 * state. 1522 */ 1523 static void dapm_post_sequence_async(void *data, async_cookie_t cookie) 1524 { 1525 struct snd_soc_dapm_context *d = data; 1526 int ret; 1527 1528 /* If we just powered the last thing off drop to standby bias */ 1529 if (d->bias_level == SND_SOC_BIAS_PREPARE && 1530 (d->target_bias_level == SND_SOC_BIAS_STANDBY || 1531 d->target_bias_level == SND_SOC_BIAS_OFF)) { 1532 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY); 1533 if (ret != 0) 1534 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n", 1535 ret); 1536 } 1537 1538 /* If we're in standby and can support bias off then do that */ 1539 if (d->bias_level == SND_SOC_BIAS_STANDBY && 1540 d->target_bias_level == SND_SOC_BIAS_OFF) { 1541 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF); 1542 if (ret != 0) 1543 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n", 1544 ret); 1545 1546 if (d->dev) 1547 pm_runtime_put(d->dev); 1548 } 1549 1550 /* If we just powered up then move to active bias */ 1551 if (d->bias_level == SND_SOC_BIAS_PREPARE && 1552 d->target_bias_level == SND_SOC_BIAS_ON) { 1553 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON); 1554 if (ret != 0) 1555 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n", 1556 ret); 1557 } 1558 } 1559 1560 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer, 1561 bool power, bool connect) 1562 { 1563 /* If a connection is being made or broken then that update 1564 * will have marked the peer dirty, otherwise the widgets are 1565 * not connected and this update has no impact. */ 1566 if (!connect) 1567 return; 1568 1569 /* If the peer is already in the state we're moving to then we 1570 * won't have an impact on it. */ 1571 if (power != peer->power) 1572 dapm_mark_dirty(peer, "peer state change"); 1573 } 1574 1575 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power, 1576 struct list_head *up_list, 1577 struct list_head *down_list) 1578 { 1579 struct snd_soc_dapm_path *path; 1580 1581 if (w->power == power) 1582 return; 1583 1584 trace_snd_soc_dapm_widget_power(w, power); 1585 1586 /* If we changed our power state perhaps our neigbours changed 1587 * also. 1588 */ 1589 list_for_each_entry(path, &w->sources, list_sink) { 1590 if (path->source) { 1591 dapm_widget_set_peer_power(path->source, power, 1592 path->connect); 1593 } 1594 } 1595 switch (w->id) { 1596 case snd_soc_dapm_supply: 1597 case snd_soc_dapm_regulator_supply: 1598 case snd_soc_dapm_clock_supply: 1599 /* Supplies can't affect their outputs, only their inputs */ 1600 break; 1601 default: 1602 list_for_each_entry(path, &w->sinks, list_source) { 1603 if (path->sink) { 1604 dapm_widget_set_peer_power(path->sink, power, 1605 path->connect); 1606 } 1607 } 1608 break; 1609 } 1610 1611 if (power) 1612 dapm_seq_insert(w, up_list, true); 1613 else 1614 dapm_seq_insert(w, down_list, false); 1615 1616 w->power = power; 1617 } 1618 1619 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w, 1620 struct list_head *up_list, 1621 struct list_head *down_list) 1622 { 1623 int power; 1624 1625 switch (w->id) { 1626 case snd_soc_dapm_pre: 1627 dapm_seq_insert(w, down_list, false); 1628 break; 1629 case snd_soc_dapm_post: 1630 dapm_seq_insert(w, up_list, true); 1631 break; 1632 1633 default: 1634 power = dapm_widget_power_check(w); 1635 1636 dapm_widget_set_power(w, power, up_list, down_list); 1637 break; 1638 } 1639 } 1640 1641 /* 1642 * Scan each dapm widget for complete audio path. 1643 * A complete path is a route that has valid endpoints i.e.:- 1644 * 1645 * o DAC to output pin. 1646 * o Input Pin to ADC. 1647 * o Input pin to Output pin (bypass, sidetone) 1648 * o DAC to ADC (loopback). 1649 */ 1650 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event) 1651 { 1652 struct snd_soc_card *card = dapm->card; 1653 struct snd_soc_dapm_widget *w; 1654 struct snd_soc_dapm_context *d; 1655 LIST_HEAD(up_list); 1656 LIST_HEAD(down_list); 1657 ASYNC_DOMAIN_EXCLUSIVE(async_domain); 1658 enum snd_soc_bias_level bias; 1659 1660 trace_snd_soc_dapm_start(card); 1661 1662 list_for_each_entry(d, &card->dapm_list, list) { 1663 if (d->idle_bias_off) 1664 d->target_bias_level = SND_SOC_BIAS_OFF; 1665 else 1666 d->target_bias_level = SND_SOC_BIAS_STANDBY; 1667 } 1668 1669 dapm_reset(card); 1670 1671 /* Check which widgets we need to power and store them in 1672 * lists indicating if they should be powered up or down. We 1673 * only check widgets that have been flagged as dirty but note 1674 * that new widgets may be added to the dirty list while we 1675 * iterate. 1676 */ 1677 list_for_each_entry(w, &card->dapm_dirty, dirty) { 1678 dapm_power_one_widget(w, &up_list, &down_list); 1679 } 1680 1681 list_for_each_entry(w, &card->widgets, list) { 1682 switch (w->id) { 1683 case snd_soc_dapm_pre: 1684 case snd_soc_dapm_post: 1685 /* These widgets always need to be powered */ 1686 break; 1687 default: 1688 list_del_init(&w->dirty); 1689 break; 1690 } 1691 1692 if (w->power) { 1693 d = w->dapm; 1694 1695 /* Supplies and micbiases only bring the 1696 * context up to STANDBY as unless something 1697 * else is active and passing audio they 1698 * generally don't require full power. Signal 1699 * generators are virtual pins and have no 1700 * power impact themselves. 1701 */ 1702 switch (w->id) { 1703 case snd_soc_dapm_siggen: 1704 break; 1705 case snd_soc_dapm_supply: 1706 case snd_soc_dapm_regulator_supply: 1707 case snd_soc_dapm_clock_supply: 1708 case snd_soc_dapm_micbias: 1709 if (d->target_bias_level < SND_SOC_BIAS_STANDBY) 1710 d->target_bias_level = SND_SOC_BIAS_STANDBY; 1711 break; 1712 default: 1713 d->target_bias_level = SND_SOC_BIAS_ON; 1714 break; 1715 } 1716 } 1717 1718 } 1719 1720 /* Force all contexts in the card to the same bias state if 1721 * they're not ground referenced. 1722 */ 1723 bias = SND_SOC_BIAS_OFF; 1724 list_for_each_entry(d, &card->dapm_list, list) 1725 if (d->target_bias_level > bias) 1726 bias = d->target_bias_level; 1727 list_for_each_entry(d, &card->dapm_list, list) 1728 if (!d->idle_bias_off) 1729 d->target_bias_level = bias; 1730 1731 trace_snd_soc_dapm_walk_done(card); 1732 1733 /* Run all the bias changes in parallel */ 1734 list_for_each_entry(d, &dapm->card->dapm_list, list) 1735 async_schedule_domain(dapm_pre_sequence_async, d, 1736 &async_domain); 1737 async_synchronize_full_domain(&async_domain); 1738 1739 list_for_each_entry(w, &down_list, power_list) { 1740 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_WILL_PMD); 1741 } 1742 1743 list_for_each_entry(w, &up_list, power_list) { 1744 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_WILL_PMU); 1745 } 1746 1747 /* Power down widgets first; try to avoid amplifying pops. */ 1748 dapm_seq_run(dapm, &down_list, event, false); 1749 1750 dapm_widget_update(dapm); 1751 1752 /* Now power up. */ 1753 dapm_seq_run(dapm, &up_list, event, true); 1754 1755 /* Run all the bias changes in parallel */ 1756 list_for_each_entry(d, &dapm->card->dapm_list, list) 1757 async_schedule_domain(dapm_post_sequence_async, d, 1758 &async_domain); 1759 async_synchronize_full_domain(&async_domain); 1760 1761 /* do we need to notify any clients that DAPM event is complete */ 1762 list_for_each_entry(d, &card->dapm_list, list) { 1763 if (d->stream_event) 1764 d->stream_event(d, event); 1765 } 1766 1767 pop_dbg(dapm->dev, card->pop_time, 1768 "DAPM sequencing finished, waiting %dms\n", card->pop_time); 1769 pop_wait(card->pop_time); 1770 1771 trace_snd_soc_dapm_done(card); 1772 1773 return 0; 1774 } 1775 1776 #ifdef CONFIG_DEBUG_FS 1777 static ssize_t dapm_widget_power_read_file(struct file *file, 1778 char __user *user_buf, 1779 size_t count, loff_t *ppos) 1780 { 1781 struct snd_soc_dapm_widget *w = file->private_data; 1782 char *buf; 1783 int in, out; 1784 ssize_t ret; 1785 struct snd_soc_dapm_path *p = NULL; 1786 1787 buf = kmalloc(PAGE_SIZE, GFP_KERNEL); 1788 if (!buf) 1789 return -ENOMEM; 1790 1791 in = is_connected_input_ep(w, NULL); 1792 dapm_clear_walk_input(w->dapm, &w->sources); 1793 out = is_connected_output_ep(w, NULL); 1794 dapm_clear_walk_output(w->dapm, &w->sinks); 1795 1796 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d", 1797 w->name, w->power ? "On" : "Off", 1798 w->force ? " (forced)" : "", in, out); 1799 1800 if (w->reg >= 0) 1801 ret += snprintf(buf + ret, PAGE_SIZE - ret, 1802 " - R%d(0x%x) bit %d", 1803 w->reg, w->reg, w->shift); 1804 1805 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n"); 1806 1807 if (w->sname) 1808 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n", 1809 w->sname, 1810 w->active ? "active" : "inactive"); 1811 1812 list_for_each_entry(p, &w->sources, list_sink) { 1813 if (p->connected && !p->connected(w, p->sink)) 1814 continue; 1815 1816 if (p->connect) 1817 ret += snprintf(buf + ret, PAGE_SIZE - ret, 1818 " in \"%s\" \"%s\"\n", 1819 p->name ? p->name : "static", 1820 p->source->name); 1821 } 1822 list_for_each_entry(p, &w->sinks, list_source) { 1823 if (p->connected && !p->connected(w, p->sink)) 1824 continue; 1825 1826 if (p->connect) 1827 ret += snprintf(buf + ret, PAGE_SIZE - ret, 1828 " out \"%s\" \"%s\"\n", 1829 p->name ? p->name : "static", 1830 p->sink->name); 1831 } 1832 1833 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 1834 1835 kfree(buf); 1836 return ret; 1837 } 1838 1839 static const struct file_operations dapm_widget_power_fops = { 1840 .open = simple_open, 1841 .read = dapm_widget_power_read_file, 1842 .llseek = default_llseek, 1843 }; 1844 1845 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf, 1846 size_t count, loff_t *ppos) 1847 { 1848 struct snd_soc_dapm_context *dapm = file->private_data; 1849 char *level; 1850 1851 switch (dapm->bias_level) { 1852 case SND_SOC_BIAS_ON: 1853 level = "On\n"; 1854 break; 1855 case SND_SOC_BIAS_PREPARE: 1856 level = "Prepare\n"; 1857 break; 1858 case SND_SOC_BIAS_STANDBY: 1859 level = "Standby\n"; 1860 break; 1861 case SND_SOC_BIAS_OFF: 1862 level = "Off\n"; 1863 break; 1864 default: 1865 BUG(); 1866 level = "Unknown\n"; 1867 break; 1868 } 1869 1870 return simple_read_from_buffer(user_buf, count, ppos, level, 1871 strlen(level)); 1872 } 1873 1874 static const struct file_operations dapm_bias_fops = { 1875 .open = simple_open, 1876 .read = dapm_bias_read_file, 1877 .llseek = default_llseek, 1878 }; 1879 1880 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm, 1881 struct dentry *parent) 1882 { 1883 struct dentry *d; 1884 1885 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent); 1886 1887 if (!dapm->debugfs_dapm) { 1888 dev_warn(dapm->dev, 1889 "ASoC: Failed to create DAPM debugfs directory\n"); 1890 return; 1891 } 1892 1893 d = debugfs_create_file("bias_level", 0444, 1894 dapm->debugfs_dapm, dapm, 1895 &dapm_bias_fops); 1896 if (!d) 1897 dev_warn(dapm->dev, 1898 "ASoC: Failed to create bias level debugfs file\n"); 1899 } 1900 1901 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w) 1902 { 1903 struct snd_soc_dapm_context *dapm = w->dapm; 1904 struct dentry *d; 1905 1906 if (!dapm->debugfs_dapm || !w->name) 1907 return; 1908 1909 d = debugfs_create_file(w->name, 0444, 1910 dapm->debugfs_dapm, w, 1911 &dapm_widget_power_fops); 1912 if (!d) 1913 dev_warn(w->dapm->dev, 1914 "ASoC: Failed to create %s debugfs file\n", 1915 w->name); 1916 } 1917 1918 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm) 1919 { 1920 debugfs_remove_recursive(dapm->debugfs_dapm); 1921 } 1922 1923 #else 1924 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm, 1925 struct dentry *parent) 1926 { 1927 } 1928 1929 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w) 1930 { 1931 } 1932 1933 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm) 1934 { 1935 } 1936 1937 #endif 1938 1939 /* test and update the power status of a mux widget */ 1940 static int soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget, 1941 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e) 1942 { 1943 struct snd_soc_dapm_path *path; 1944 int found = 0; 1945 1946 if (widget->id != snd_soc_dapm_mux && 1947 widget->id != snd_soc_dapm_virt_mux && 1948 widget->id != snd_soc_dapm_value_mux) 1949 return -ENODEV; 1950 1951 /* find dapm widget path assoc with kcontrol */ 1952 list_for_each_entry(path, &widget->dapm->card->paths, list) { 1953 if (path->kcontrol != kcontrol) 1954 continue; 1955 1956 if (!path->name || !e->texts[mux]) 1957 continue; 1958 1959 found = 1; 1960 /* we now need to match the string in the enum to the path */ 1961 if (!(strcmp(path->name, e->texts[mux]))) { 1962 path->connect = 1; /* new connection */ 1963 dapm_mark_dirty(path->source, "mux connection"); 1964 } else { 1965 if (path->connect) 1966 dapm_mark_dirty(path->source, 1967 "mux disconnection"); 1968 path->connect = 0; /* old connection must be powered down */ 1969 } 1970 } 1971 1972 if (found) { 1973 dapm_mark_dirty(widget, "mux change"); 1974 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP); 1975 } 1976 1977 return found; 1978 } 1979 1980 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget, 1981 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e) 1982 { 1983 struct snd_soc_card *card = widget->dapm->card; 1984 int ret; 1985 1986 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 1987 ret = soc_dapm_mux_update_power(widget, kcontrol, mux, e); 1988 mutex_unlock(&card->dapm_mutex); 1989 if (ret > 0) 1990 soc_dpcm_runtime_update(widget); 1991 return ret; 1992 } 1993 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power); 1994 1995 /* test and update the power status of a mixer or switch widget */ 1996 static int soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget, 1997 struct snd_kcontrol *kcontrol, int connect) 1998 { 1999 struct snd_soc_dapm_path *path; 2000 int found = 0; 2001 2002 if (widget->id != snd_soc_dapm_mixer && 2003 widget->id != snd_soc_dapm_mixer_named_ctl && 2004 widget->id != snd_soc_dapm_switch) 2005 return -ENODEV; 2006 2007 /* find dapm widget path assoc with kcontrol */ 2008 list_for_each_entry(path, &widget->dapm->card->paths, list) { 2009 if (path->kcontrol != kcontrol) 2010 continue; 2011 2012 /* found, now check type */ 2013 found = 1; 2014 path->connect = connect; 2015 dapm_mark_dirty(path->source, "mixer connection"); 2016 } 2017 2018 if (found) { 2019 dapm_mark_dirty(widget, "mixer update"); 2020 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP); 2021 } 2022 2023 return found; 2024 } 2025 2026 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget, 2027 struct snd_kcontrol *kcontrol, int connect) 2028 { 2029 struct snd_soc_card *card = widget->dapm->card; 2030 int ret; 2031 2032 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 2033 ret = soc_dapm_mixer_update_power(widget, kcontrol, connect); 2034 mutex_unlock(&card->dapm_mutex); 2035 if (ret > 0) 2036 soc_dpcm_runtime_update(widget); 2037 return ret; 2038 } 2039 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power); 2040 2041 /* show dapm widget status in sys fs */ 2042 static ssize_t dapm_widget_show(struct device *dev, 2043 struct device_attribute *attr, char *buf) 2044 { 2045 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); 2046 struct snd_soc_codec *codec =rtd->codec; 2047 struct snd_soc_dapm_widget *w; 2048 int count = 0; 2049 char *state = "not set"; 2050 2051 list_for_each_entry(w, &codec->card->widgets, list) { 2052 if (w->dapm != &codec->dapm) 2053 continue; 2054 2055 /* only display widgets that burnm power */ 2056 switch (w->id) { 2057 case snd_soc_dapm_hp: 2058 case snd_soc_dapm_mic: 2059 case snd_soc_dapm_spk: 2060 case snd_soc_dapm_line: 2061 case snd_soc_dapm_micbias: 2062 case snd_soc_dapm_dac: 2063 case snd_soc_dapm_adc: 2064 case snd_soc_dapm_pga: 2065 case snd_soc_dapm_out_drv: 2066 case snd_soc_dapm_mixer: 2067 case snd_soc_dapm_mixer_named_ctl: 2068 case snd_soc_dapm_supply: 2069 case snd_soc_dapm_regulator_supply: 2070 case snd_soc_dapm_clock_supply: 2071 if (w->name) 2072 count += sprintf(buf + count, "%s: %s\n", 2073 w->name, w->power ? "On":"Off"); 2074 break; 2075 default: 2076 break; 2077 } 2078 } 2079 2080 switch (codec->dapm.bias_level) { 2081 case SND_SOC_BIAS_ON: 2082 state = "On"; 2083 break; 2084 case SND_SOC_BIAS_PREPARE: 2085 state = "Prepare"; 2086 break; 2087 case SND_SOC_BIAS_STANDBY: 2088 state = "Standby"; 2089 break; 2090 case SND_SOC_BIAS_OFF: 2091 state = "Off"; 2092 break; 2093 } 2094 count += sprintf(buf + count, "PM State: %s\n", state); 2095 2096 return count; 2097 } 2098 2099 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL); 2100 2101 int snd_soc_dapm_sys_add(struct device *dev) 2102 { 2103 return device_create_file(dev, &dev_attr_dapm_widget); 2104 } 2105 2106 static void snd_soc_dapm_sys_remove(struct device *dev) 2107 { 2108 device_remove_file(dev, &dev_attr_dapm_widget); 2109 } 2110 2111 static void dapm_free_path(struct snd_soc_dapm_path *path) 2112 { 2113 list_del(&path->list_sink); 2114 list_del(&path->list_source); 2115 list_del(&path->list); 2116 kfree(path); 2117 } 2118 2119 /* free all dapm widgets and resources */ 2120 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm) 2121 { 2122 struct snd_soc_dapm_widget *w, *next_w; 2123 struct snd_soc_dapm_path *p, *next_p; 2124 2125 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) { 2126 if (w->dapm != dapm) 2127 continue; 2128 list_del(&w->list); 2129 /* 2130 * remove source and sink paths associated to this widget. 2131 * While removing the path, remove reference to it from both 2132 * source and sink widgets so that path is removed only once. 2133 */ 2134 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) 2135 dapm_free_path(p); 2136 2137 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) 2138 dapm_free_path(p); 2139 2140 kfree(w->kcontrols); 2141 kfree(w->name); 2142 kfree(w); 2143 } 2144 } 2145 2146 static struct snd_soc_dapm_widget *dapm_find_widget( 2147 struct snd_soc_dapm_context *dapm, const char *pin, 2148 bool search_other_contexts) 2149 { 2150 struct snd_soc_dapm_widget *w; 2151 struct snd_soc_dapm_widget *fallback = NULL; 2152 2153 list_for_each_entry(w, &dapm->card->widgets, list) { 2154 if (!strcmp(w->name, pin)) { 2155 if (w->dapm == dapm) 2156 return w; 2157 else 2158 fallback = w; 2159 } 2160 } 2161 2162 if (search_other_contexts) 2163 return fallback; 2164 2165 return NULL; 2166 } 2167 2168 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm, 2169 const char *pin, int status) 2170 { 2171 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); 2172 2173 if (!w) { 2174 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin); 2175 return -EINVAL; 2176 } 2177 2178 if (w->connected != status) 2179 dapm_mark_dirty(w, "pin configuration"); 2180 2181 w->connected = status; 2182 if (status == 0) 2183 w->force = 0; 2184 2185 return 0; 2186 } 2187 2188 /** 2189 * snd_soc_dapm_sync - scan and power dapm paths 2190 * @dapm: DAPM context 2191 * 2192 * Walks all dapm audio paths and powers widgets according to their 2193 * stream or path usage. 2194 * 2195 * Returns 0 for success. 2196 */ 2197 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm) 2198 { 2199 int ret; 2200 2201 /* 2202 * Suppress early reports (eg, jacks syncing their state) to avoid 2203 * silly DAPM runs during card startup. 2204 */ 2205 if (!dapm->card || !dapm->card->instantiated) 2206 return 0; 2207 2208 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 2209 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP); 2210 mutex_unlock(&dapm->card->dapm_mutex); 2211 return ret; 2212 } 2213 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync); 2214 2215 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm, 2216 const struct snd_soc_dapm_route *route) 2217 { 2218 struct snd_soc_dapm_path *path; 2219 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w; 2220 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL; 2221 const char *sink; 2222 const char *control = route->control; 2223 const char *source; 2224 char prefixed_sink[80]; 2225 char prefixed_source[80]; 2226 int ret = 0; 2227 2228 if (dapm->codec && dapm->codec->name_prefix) { 2229 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s", 2230 dapm->codec->name_prefix, route->sink); 2231 sink = prefixed_sink; 2232 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s", 2233 dapm->codec->name_prefix, route->source); 2234 source = prefixed_source; 2235 } else { 2236 sink = route->sink; 2237 source = route->source; 2238 } 2239 2240 /* 2241 * find src and dest widgets over all widgets but favor a widget from 2242 * current DAPM context 2243 */ 2244 list_for_each_entry(w, &dapm->card->widgets, list) { 2245 if (!wsink && !(strcmp(w->name, sink))) { 2246 wtsink = w; 2247 if (w->dapm == dapm) 2248 wsink = w; 2249 continue; 2250 } 2251 if (!wsource && !(strcmp(w->name, source))) { 2252 wtsource = w; 2253 if (w->dapm == dapm) 2254 wsource = w; 2255 } 2256 } 2257 /* use widget from another DAPM context if not found from this */ 2258 if (!wsink) 2259 wsink = wtsink; 2260 if (!wsource) 2261 wsource = wtsource; 2262 2263 if (wsource == NULL) { 2264 dev_err(dapm->dev, "ASoC: no source widget found for %s\n", 2265 route->source); 2266 return -ENODEV; 2267 } 2268 if (wsink == NULL) { 2269 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n", 2270 route->sink); 2271 return -ENODEV; 2272 } 2273 2274 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL); 2275 if (!path) 2276 return -ENOMEM; 2277 2278 path->source = wsource; 2279 path->sink = wsink; 2280 path->connected = route->connected; 2281 INIT_LIST_HEAD(&path->list); 2282 INIT_LIST_HEAD(&path->list_source); 2283 INIT_LIST_HEAD(&path->list_sink); 2284 2285 /* check for external widgets */ 2286 if (wsink->id == snd_soc_dapm_input) { 2287 if (wsource->id == snd_soc_dapm_micbias || 2288 wsource->id == snd_soc_dapm_mic || 2289 wsource->id == snd_soc_dapm_line || 2290 wsource->id == snd_soc_dapm_output) 2291 wsink->ext = 1; 2292 } 2293 if (wsource->id == snd_soc_dapm_output) { 2294 if (wsink->id == snd_soc_dapm_spk || 2295 wsink->id == snd_soc_dapm_hp || 2296 wsink->id == snd_soc_dapm_line || 2297 wsink->id == snd_soc_dapm_input) 2298 wsource->ext = 1; 2299 } 2300 2301 /* connect static paths */ 2302 if (control == NULL) { 2303 list_add(&path->list, &dapm->card->paths); 2304 list_add(&path->list_sink, &wsink->sources); 2305 list_add(&path->list_source, &wsource->sinks); 2306 path->connect = 1; 2307 return 0; 2308 } 2309 2310 /* connect dynamic paths */ 2311 switch (wsink->id) { 2312 case snd_soc_dapm_adc: 2313 case snd_soc_dapm_dac: 2314 case snd_soc_dapm_pga: 2315 case snd_soc_dapm_out_drv: 2316 case snd_soc_dapm_input: 2317 case snd_soc_dapm_output: 2318 case snd_soc_dapm_siggen: 2319 case snd_soc_dapm_micbias: 2320 case snd_soc_dapm_vmid: 2321 case snd_soc_dapm_pre: 2322 case snd_soc_dapm_post: 2323 case snd_soc_dapm_supply: 2324 case snd_soc_dapm_regulator_supply: 2325 case snd_soc_dapm_clock_supply: 2326 case snd_soc_dapm_aif_in: 2327 case snd_soc_dapm_aif_out: 2328 case snd_soc_dapm_dai_in: 2329 case snd_soc_dapm_dai_out: 2330 case snd_soc_dapm_dai_link: 2331 list_add(&path->list, &dapm->card->paths); 2332 list_add(&path->list_sink, &wsink->sources); 2333 list_add(&path->list_source, &wsource->sinks); 2334 path->connect = 1; 2335 return 0; 2336 case snd_soc_dapm_mux: 2337 case snd_soc_dapm_virt_mux: 2338 case snd_soc_dapm_value_mux: 2339 ret = dapm_connect_mux(dapm, wsource, wsink, path, control, 2340 &wsink->kcontrol_news[0]); 2341 if (ret != 0) 2342 goto err; 2343 break; 2344 case snd_soc_dapm_switch: 2345 case snd_soc_dapm_mixer: 2346 case snd_soc_dapm_mixer_named_ctl: 2347 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control); 2348 if (ret != 0) 2349 goto err; 2350 break; 2351 case snd_soc_dapm_hp: 2352 case snd_soc_dapm_mic: 2353 case snd_soc_dapm_line: 2354 case snd_soc_dapm_spk: 2355 list_add(&path->list, &dapm->card->paths); 2356 list_add(&path->list_sink, &wsink->sources); 2357 list_add(&path->list_source, &wsource->sinks); 2358 path->connect = 0; 2359 return 0; 2360 } 2361 2362 dapm_mark_dirty(wsource, "Route added"); 2363 dapm_mark_dirty(wsink, "Route added"); 2364 2365 return 0; 2366 2367 err: 2368 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n", 2369 source, control, sink); 2370 kfree(path); 2371 return ret; 2372 } 2373 2374 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm, 2375 const struct snd_soc_dapm_route *route) 2376 { 2377 struct snd_soc_dapm_path *path, *p; 2378 const char *sink; 2379 const char *source; 2380 char prefixed_sink[80]; 2381 char prefixed_source[80]; 2382 2383 if (route->control) { 2384 dev_err(dapm->dev, 2385 "ASoC: Removal of routes with controls not supported\n"); 2386 return -EINVAL; 2387 } 2388 2389 if (dapm->codec && dapm->codec->name_prefix) { 2390 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s", 2391 dapm->codec->name_prefix, route->sink); 2392 sink = prefixed_sink; 2393 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s", 2394 dapm->codec->name_prefix, route->source); 2395 source = prefixed_source; 2396 } else { 2397 sink = route->sink; 2398 source = route->source; 2399 } 2400 2401 path = NULL; 2402 list_for_each_entry(p, &dapm->card->paths, list) { 2403 if (strcmp(p->source->name, source) != 0) 2404 continue; 2405 if (strcmp(p->sink->name, sink) != 0) 2406 continue; 2407 path = p; 2408 break; 2409 } 2410 2411 if (path) { 2412 dapm_mark_dirty(path->source, "Route removed"); 2413 dapm_mark_dirty(path->sink, "Route removed"); 2414 2415 dapm_free_path(path); 2416 } else { 2417 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n", 2418 source, sink); 2419 } 2420 2421 return 0; 2422 } 2423 2424 /** 2425 * snd_soc_dapm_add_routes - Add routes between DAPM widgets 2426 * @dapm: DAPM context 2427 * @route: audio routes 2428 * @num: number of routes 2429 * 2430 * Connects 2 dapm widgets together via a named audio path. The sink is 2431 * the widget receiving the audio signal, whilst the source is the sender 2432 * of the audio signal. 2433 * 2434 * Returns 0 for success else error. On error all resources can be freed 2435 * with a call to snd_soc_card_free(). 2436 */ 2437 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm, 2438 const struct snd_soc_dapm_route *route, int num) 2439 { 2440 int i, r, ret = 0; 2441 2442 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT); 2443 for (i = 0; i < num; i++) { 2444 r = snd_soc_dapm_add_route(dapm, route); 2445 if (r < 0) { 2446 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n", 2447 route->source, 2448 route->control ? route->control : "direct", 2449 route->sink); 2450 ret = r; 2451 } 2452 route++; 2453 } 2454 mutex_unlock(&dapm->card->dapm_mutex); 2455 2456 return ret; 2457 } 2458 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes); 2459 2460 /** 2461 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets 2462 * @dapm: DAPM context 2463 * @route: audio routes 2464 * @num: number of routes 2465 * 2466 * Removes routes from the DAPM context. 2467 */ 2468 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm, 2469 const struct snd_soc_dapm_route *route, int num) 2470 { 2471 int i, ret = 0; 2472 2473 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT); 2474 for (i = 0; i < num; i++) { 2475 snd_soc_dapm_del_route(dapm, route); 2476 route++; 2477 } 2478 mutex_unlock(&dapm->card->dapm_mutex); 2479 2480 return ret; 2481 } 2482 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes); 2483 2484 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm, 2485 const struct snd_soc_dapm_route *route) 2486 { 2487 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm, 2488 route->source, 2489 true); 2490 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm, 2491 route->sink, 2492 true); 2493 struct snd_soc_dapm_path *path; 2494 int count = 0; 2495 2496 if (!source) { 2497 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n", 2498 route->source); 2499 return -ENODEV; 2500 } 2501 2502 if (!sink) { 2503 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n", 2504 route->sink); 2505 return -ENODEV; 2506 } 2507 2508 if (route->control || route->connected) 2509 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n", 2510 route->source, route->sink); 2511 2512 list_for_each_entry(path, &source->sinks, list_source) { 2513 if (path->sink == sink) { 2514 path->weak = 1; 2515 count++; 2516 } 2517 } 2518 2519 if (count == 0) 2520 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n", 2521 route->source, route->sink); 2522 if (count > 1) 2523 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n", 2524 count, route->source, route->sink); 2525 2526 return 0; 2527 } 2528 2529 /** 2530 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak 2531 * @dapm: DAPM context 2532 * @route: audio routes 2533 * @num: number of routes 2534 * 2535 * Mark existing routes matching those specified in the passed array 2536 * as being weak, meaning that they are ignored for the purpose of 2537 * power decisions. The main intended use case is for sidetone paths 2538 * which couple audio between other independent paths if they are both 2539 * active in order to make the combination work better at the user 2540 * level but which aren't intended to be "used". 2541 * 2542 * Note that CODEC drivers should not use this as sidetone type paths 2543 * can frequently also be used as bypass paths. 2544 */ 2545 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm, 2546 const struct snd_soc_dapm_route *route, int num) 2547 { 2548 int i, err; 2549 int ret = 0; 2550 2551 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT); 2552 for (i = 0; i < num; i++) { 2553 err = snd_soc_dapm_weak_route(dapm, route); 2554 if (err) 2555 ret = err; 2556 route++; 2557 } 2558 mutex_unlock(&dapm->card->dapm_mutex); 2559 2560 return ret; 2561 } 2562 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes); 2563 2564 /** 2565 * snd_soc_dapm_new_widgets - add new dapm widgets 2566 * @dapm: DAPM context 2567 * 2568 * Checks the codec for any new dapm widgets and creates them if found. 2569 * 2570 * Returns 0 for success. 2571 */ 2572 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm) 2573 { 2574 struct snd_soc_dapm_widget *w; 2575 unsigned int val; 2576 2577 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT); 2578 2579 list_for_each_entry(w, &dapm->card->widgets, list) 2580 { 2581 if (w->new) 2582 continue; 2583 2584 if (w->num_kcontrols) { 2585 w->kcontrols = kzalloc(w->num_kcontrols * 2586 sizeof(struct snd_kcontrol *), 2587 GFP_KERNEL); 2588 if (!w->kcontrols) { 2589 mutex_unlock(&dapm->card->dapm_mutex); 2590 return -ENOMEM; 2591 } 2592 } 2593 2594 switch(w->id) { 2595 case snd_soc_dapm_switch: 2596 case snd_soc_dapm_mixer: 2597 case snd_soc_dapm_mixer_named_ctl: 2598 dapm_new_mixer(w); 2599 break; 2600 case snd_soc_dapm_mux: 2601 case snd_soc_dapm_virt_mux: 2602 case snd_soc_dapm_value_mux: 2603 dapm_new_mux(w); 2604 break; 2605 case snd_soc_dapm_pga: 2606 case snd_soc_dapm_out_drv: 2607 dapm_new_pga(w); 2608 break; 2609 default: 2610 break; 2611 } 2612 2613 /* Read the initial power state from the device */ 2614 if (w->reg >= 0) { 2615 val = soc_widget_read(w, w->reg); 2616 val &= 1 << w->shift; 2617 if (w->invert) 2618 val = !val; 2619 2620 if (val) 2621 w->power = 1; 2622 } 2623 2624 w->new = 1; 2625 2626 dapm_mark_dirty(w, "new widget"); 2627 dapm_debugfs_add_widget(w); 2628 } 2629 2630 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP); 2631 mutex_unlock(&dapm->card->dapm_mutex); 2632 return 0; 2633 } 2634 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets); 2635 2636 /** 2637 * snd_soc_dapm_get_volsw - dapm mixer get callback 2638 * @kcontrol: mixer control 2639 * @ucontrol: control element information 2640 * 2641 * Callback to get the value of a dapm mixer control. 2642 * 2643 * Returns 0 for success. 2644 */ 2645 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol, 2646 struct snd_ctl_elem_value *ucontrol) 2647 { 2648 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol); 2649 struct snd_soc_dapm_widget *widget = wlist->widgets[0]; 2650 struct soc_mixer_control *mc = 2651 (struct soc_mixer_control *)kcontrol->private_value; 2652 unsigned int reg = mc->reg; 2653 unsigned int shift = mc->shift; 2654 int max = mc->max; 2655 unsigned int mask = (1 << fls(max)) - 1; 2656 unsigned int invert = mc->invert; 2657 2658 if (snd_soc_volsw_is_stereo(mc)) 2659 dev_warn(widget->dapm->dev, 2660 "ASoC: Control '%s' is stereo, which is not supported\n", 2661 kcontrol->id.name); 2662 2663 ucontrol->value.integer.value[0] = 2664 (snd_soc_read(widget->codec, reg) >> shift) & mask; 2665 if (invert) 2666 ucontrol->value.integer.value[0] = 2667 max - ucontrol->value.integer.value[0]; 2668 2669 return 0; 2670 } 2671 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw); 2672 2673 /** 2674 * snd_soc_dapm_put_volsw - dapm mixer set callback 2675 * @kcontrol: mixer control 2676 * @ucontrol: control element information 2677 * 2678 * Callback to set the value of a dapm mixer control. 2679 * 2680 * Returns 0 for success. 2681 */ 2682 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol, 2683 struct snd_ctl_elem_value *ucontrol) 2684 { 2685 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol); 2686 struct snd_soc_dapm_widget *widget = wlist->widgets[0]; 2687 struct snd_soc_codec *codec = widget->codec; 2688 struct snd_soc_card *card = codec->card; 2689 struct soc_mixer_control *mc = 2690 (struct soc_mixer_control *)kcontrol->private_value; 2691 unsigned int reg = mc->reg; 2692 unsigned int shift = mc->shift; 2693 int max = mc->max; 2694 unsigned int mask = (1 << fls(max)) - 1; 2695 unsigned int invert = mc->invert; 2696 unsigned int val; 2697 int connect, change; 2698 struct snd_soc_dapm_update update; 2699 int wi; 2700 2701 if (snd_soc_volsw_is_stereo(mc)) 2702 dev_warn(widget->dapm->dev, 2703 "ASoC: Control '%s' is stereo, which is not supported\n", 2704 kcontrol->id.name); 2705 2706 val = (ucontrol->value.integer.value[0] & mask); 2707 connect = !!val; 2708 2709 if (invert) 2710 val = max - val; 2711 mask = mask << shift; 2712 val = val << shift; 2713 2714 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 2715 2716 change = snd_soc_test_bits(widget->codec, reg, mask, val); 2717 if (change) { 2718 for (wi = 0; wi < wlist->num_widgets; wi++) { 2719 widget = wlist->widgets[wi]; 2720 2721 widget->value = val; 2722 2723 update.kcontrol = kcontrol; 2724 update.widget = widget; 2725 update.reg = reg; 2726 update.mask = mask; 2727 update.val = val; 2728 widget->dapm->update = &update; 2729 2730 soc_dapm_mixer_update_power(widget, kcontrol, connect); 2731 2732 widget->dapm->update = NULL; 2733 } 2734 } 2735 2736 mutex_unlock(&card->dapm_mutex); 2737 return change; 2738 } 2739 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw); 2740 2741 /** 2742 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback 2743 * @kcontrol: mixer control 2744 * @ucontrol: control element information 2745 * 2746 * Callback to get the value of a dapm enumerated double mixer control. 2747 * 2748 * Returns 0 for success. 2749 */ 2750 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol, 2751 struct snd_ctl_elem_value *ucontrol) 2752 { 2753 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol); 2754 struct snd_soc_dapm_widget *widget = wlist->widgets[0]; 2755 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; 2756 unsigned int val; 2757 2758 val = snd_soc_read(widget->codec, e->reg); 2759 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask; 2760 if (e->shift_l != e->shift_r) 2761 ucontrol->value.enumerated.item[1] = 2762 (val >> e->shift_r) & e->mask; 2763 2764 return 0; 2765 } 2766 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double); 2767 2768 /** 2769 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback 2770 * @kcontrol: mixer control 2771 * @ucontrol: control element information 2772 * 2773 * Callback to set the value of a dapm enumerated double mixer control. 2774 * 2775 * Returns 0 for success. 2776 */ 2777 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol, 2778 struct snd_ctl_elem_value *ucontrol) 2779 { 2780 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol); 2781 struct snd_soc_dapm_widget *widget = wlist->widgets[0]; 2782 struct snd_soc_codec *codec = widget->codec; 2783 struct snd_soc_card *card = codec->card; 2784 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; 2785 unsigned int val, mux, change; 2786 unsigned int mask; 2787 struct snd_soc_dapm_update update; 2788 int wi; 2789 2790 if (ucontrol->value.enumerated.item[0] > e->max - 1) 2791 return -EINVAL; 2792 mux = ucontrol->value.enumerated.item[0]; 2793 val = mux << e->shift_l; 2794 mask = e->mask << e->shift_l; 2795 if (e->shift_l != e->shift_r) { 2796 if (ucontrol->value.enumerated.item[1] > e->max - 1) 2797 return -EINVAL; 2798 val |= ucontrol->value.enumerated.item[1] << e->shift_r; 2799 mask |= e->mask << e->shift_r; 2800 } 2801 2802 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 2803 2804 change = snd_soc_test_bits(widget->codec, e->reg, mask, val); 2805 if (change) { 2806 for (wi = 0; wi < wlist->num_widgets; wi++) { 2807 widget = wlist->widgets[wi]; 2808 2809 widget->value = val; 2810 2811 update.kcontrol = kcontrol; 2812 update.widget = widget; 2813 update.reg = e->reg; 2814 update.mask = mask; 2815 update.val = val; 2816 widget->dapm->update = &update; 2817 2818 soc_dapm_mux_update_power(widget, kcontrol, mux, e); 2819 2820 widget->dapm->update = NULL; 2821 } 2822 } 2823 2824 mutex_unlock(&card->dapm_mutex); 2825 return change; 2826 } 2827 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double); 2828 2829 /** 2830 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux 2831 * @kcontrol: mixer control 2832 * @ucontrol: control element information 2833 * 2834 * Returns 0 for success. 2835 */ 2836 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol, 2837 struct snd_ctl_elem_value *ucontrol) 2838 { 2839 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol); 2840 struct snd_soc_dapm_widget *widget = wlist->widgets[0]; 2841 2842 ucontrol->value.enumerated.item[0] = widget->value; 2843 2844 return 0; 2845 } 2846 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt); 2847 2848 /** 2849 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux 2850 * @kcontrol: mixer control 2851 * @ucontrol: control element information 2852 * 2853 * Returns 0 for success. 2854 */ 2855 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol, 2856 struct snd_ctl_elem_value *ucontrol) 2857 { 2858 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol); 2859 struct snd_soc_dapm_widget *widget = wlist->widgets[0]; 2860 struct snd_soc_codec *codec = widget->codec; 2861 struct snd_soc_card *card = codec->card; 2862 struct soc_enum *e = 2863 (struct soc_enum *)kcontrol->private_value; 2864 int change; 2865 int wi; 2866 2867 if (ucontrol->value.enumerated.item[0] >= e->max) 2868 return -EINVAL; 2869 2870 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 2871 2872 change = widget->value != ucontrol->value.enumerated.item[0]; 2873 if (change) { 2874 for (wi = 0; wi < wlist->num_widgets; wi++) { 2875 widget = wlist->widgets[wi]; 2876 2877 widget->value = ucontrol->value.enumerated.item[0]; 2878 2879 soc_dapm_mux_update_power(widget, kcontrol, widget->value, e); 2880 } 2881 } 2882 2883 mutex_unlock(&card->dapm_mutex); 2884 return change; 2885 } 2886 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt); 2887 2888 /** 2889 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get 2890 * callback 2891 * @kcontrol: mixer control 2892 * @ucontrol: control element information 2893 * 2894 * Callback to get the value of a dapm semi enumerated double mixer control. 2895 * 2896 * Semi enumerated mixer: the enumerated items are referred as values. Can be 2897 * used for handling bitfield coded enumeration for example. 2898 * 2899 * Returns 0 for success. 2900 */ 2901 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol, 2902 struct snd_ctl_elem_value *ucontrol) 2903 { 2904 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol); 2905 struct snd_soc_dapm_widget *widget = wlist->widgets[0]; 2906 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; 2907 unsigned int reg_val, val, mux; 2908 2909 reg_val = snd_soc_read(widget->codec, e->reg); 2910 val = (reg_val >> e->shift_l) & e->mask; 2911 for (mux = 0; mux < e->max; mux++) { 2912 if (val == e->values[mux]) 2913 break; 2914 } 2915 ucontrol->value.enumerated.item[0] = mux; 2916 if (e->shift_l != e->shift_r) { 2917 val = (reg_val >> e->shift_r) & e->mask; 2918 for (mux = 0; mux < e->max; mux++) { 2919 if (val == e->values[mux]) 2920 break; 2921 } 2922 ucontrol->value.enumerated.item[1] = mux; 2923 } 2924 2925 return 0; 2926 } 2927 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double); 2928 2929 /** 2930 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set 2931 * callback 2932 * @kcontrol: mixer control 2933 * @ucontrol: control element information 2934 * 2935 * Callback to set the value of a dapm semi enumerated double mixer control. 2936 * 2937 * Semi enumerated mixer: the enumerated items are referred as values. Can be 2938 * used for handling bitfield coded enumeration for example. 2939 * 2940 * Returns 0 for success. 2941 */ 2942 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol, 2943 struct snd_ctl_elem_value *ucontrol) 2944 { 2945 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol); 2946 struct snd_soc_dapm_widget *widget = wlist->widgets[0]; 2947 struct snd_soc_codec *codec = widget->codec; 2948 struct snd_soc_card *card = codec->card; 2949 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; 2950 unsigned int val, mux, change; 2951 unsigned int mask; 2952 struct snd_soc_dapm_update update; 2953 int wi; 2954 2955 if (ucontrol->value.enumerated.item[0] > e->max - 1) 2956 return -EINVAL; 2957 mux = ucontrol->value.enumerated.item[0]; 2958 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l; 2959 mask = e->mask << e->shift_l; 2960 if (e->shift_l != e->shift_r) { 2961 if (ucontrol->value.enumerated.item[1] > e->max - 1) 2962 return -EINVAL; 2963 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r; 2964 mask |= e->mask << e->shift_r; 2965 } 2966 2967 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 2968 2969 change = snd_soc_test_bits(widget->codec, e->reg, mask, val); 2970 if (change) { 2971 for (wi = 0; wi < wlist->num_widgets; wi++) { 2972 widget = wlist->widgets[wi]; 2973 2974 widget->value = val; 2975 2976 update.kcontrol = kcontrol; 2977 update.widget = widget; 2978 update.reg = e->reg; 2979 update.mask = mask; 2980 update.val = val; 2981 widget->dapm->update = &update; 2982 2983 soc_dapm_mux_update_power(widget, kcontrol, mux, e); 2984 2985 widget->dapm->update = NULL; 2986 } 2987 } 2988 2989 mutex_unlock(&card->dapm_mutex); 2990 return change; 2991 } 2992 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double); 2993 2994 /** 2995 * snd_soc_dapm_info_pin_switch - Info for a pin switch 2996 * 2997 * @kcontrol: mixer control 2998 * @uinfo: control element information 2999 * 3000 * Callback to provide information about a pin switch control. 3001 */ 3002 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol, 3003 struct snd_ctl_elem_info *uinfo) 3004 { 3005 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 3006 uinfo->count = 1; 3007 uinfo->value.integer.min = 0; 3008 uinfo->value.integer.max = 1; 3009 3010 return 0; 3011 } 3012 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch); 3013 3014 /** 3015 * snd_soc_dapm_get_pin_switch - Get information for a pin switch 3016 * 3017 * @kcontrol: mixer control 3018 * @ucontrol: Value 3019 */ 3020 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol, 3021 struct snd_ctl_elem_value *ucontrol) 3022 { 3023 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); 3024 const char *pin = (const char *)kcontrol->private_value; 3025 3026 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 3027 3028 ucontrol->value.integer.value[0] = 3029 snd_soc_dapm_get_pin_status(&card->dapm, pin); 3030 3031 mutex_unlock(&card->dapm_mutex); 3032 3033 return 0; 3034 } 3035 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch); 3036 3037 /** 3038 * snd_soc_dapm_put_pin_switch - Set information for a pin switch 3039 * 3040 * @kcontrol: mixer control 3041 * @ucontrol: Value 3042 */ 3043 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol, 3044 struct snd_ctl_elem_value *ucontrol) 3045 { 3046 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); 3047 const char *pin = (const char *)kcontrol->private_value; 3048 3049 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 3050 3051 if (ucontrol->value.integer.value[0]) 3052 snd_soc_dapm_enable_pin(&card->dapm, pin); 3053 else 3054 snd_soc_dapm_disable_pin(&card->dapm, pin); 3055 3056 mutex_unlock(&card->dapm_mutex); 3057 3058 snd_soc_dapm_sync(&card->dapm); 3059 return 0; 3060 } 3061 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch); 3062 3063 static struct snd_soc_dapm_widget * 3064 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm, 3065 const struct snd_soc_dapm_widget *widget) 3066 { 3067 struct snd_soc_dapm_widget *w; 3068 int ret; 3069 3070 if ((w = dapm_cnew_widget(widget)) == NULL) 3071 return NULL; 3072 3073 switch (w->id) { 3074 case snd_soc_dapm_regulator_supply: 3075 w->regulator = devm_regulator_get(dapm->dev, w->name); 3076 if (IS_ERR(w->regulator)) { 3077 ret = PTR_ERR(w->regulator); 3078 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n", 3079 w->name, ret); 3080 return NULL; 3081 } 3082 3083 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) { 3084 ret = regulator_allow_bypass(w->regulator, true); 3085 if (ret != 0) 3086 dev_warn(w->dapm->dev, 3087 "ASoC: Failed to unbypass %s: %d\n", 3088 w->name, ret); 3089 } 3090 break; 3091 case snd_soc_dapm_clock_supply: 3092 #ifdef CONFIG_CLKDEV_LOOKUP 3093 w->clk = devm_clk_get(dapm->dev, w->name); 3094 if (IS_ERR(w->clk)) { 3095 ret = PTR_ERR(w->clk); 3096 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n", 3097 w->name, ret); 3098 return NULL; 3099 } 3100 #else 3101 return NULL; 3102 #endif 3103 break; 3104 default: 3105 break; 3106 } 3107 3108 if (dapm->codec && dapm->codec->name_prefix) 3109 w->name = kasprintf(GFP_KERNEL, "%s %s", 3110 dapm->codec->name_prefix, widget->name); 3111 else 3112 w->name = kasprintf(GFP_KERNEL, "%s", widget->name); 3113 3114 if (w->name == NULL) { 3115 kfree(w); 3116 return NULL; 3117 } 3118 3119 switch (w->id) { 3120 case snd_soc_dapm_switch: 3121 case snd_soc_dapm_mixer: 3122 case snd_soc_dapm_mixer_named_ctl: 3123 w->power_check = dapm_generic_check_power; 3124 break; 3125 case snd_soc_dapm_mux: 3126 case snd_soc_dapm_virt_mux: 3127 case snd_soc_dapm_value_mux: 3128 w->power_check = dapm_generic_check_power; 3129 break; 3130 case snd_soc_dapm_adc: 3131 case snd_soc_dapm_aif_out: 3132 case snd_soc_dapm_dai_out: 3133 w->power_check = dapm_adc_check_power; 3134 break; 3135 case snd_soc_dapm_dac: 3136 case snd_soc_dapm_aif_in: 3137 case snd_soc_dapm_dai_in: 3138 w->power_check = dapm_dac_check_power; 3139 break; 3140 case snd_soc_dapm_pga: 3141 case snd_soc_dapm_out_drv: 3142 case snd_soc_dapm_input: 3143 case snd_soc_dapm_output: 3144 case snd_soc_dapm_micbias: 3145 case snd_soc_dapm_spk: 3146 case snd_soc_dapm_hp: 3147 case snd_soc_dapm_mic: 3148 case snd_soc_dapm_line: 3149 case snd_soc_dapm_dai_link: 3150 w->power_check = dapm_generic_check_power; 3151 break; 3152 case snd_soc_dapm_supply: 3153 case snd_soc_dapm_regulator_supply: 3154 case snd_soc_dapm_clock_supply: 3155 w->power_check = dapm_supply_check_power; 3156 break; 3157 default: 3158 w->power_check = dapm_always_on_check_power; 3159 break; 3160 } 3161 3162 w->dapm = dapm; 3163 w->codec = dapm->codec; 3164 w->platform = dapm->platform; 3165 INIT_LIST_HEAD(&w->sources); 3166 INIT_LIST_HEAD(&w->sinks); 3167 INIT_LIST_HEAD(&w->list); 3168 INIT_LIST_HEAD(&w->dirty); 3169 list_add(&w->list, &dapm->card->widgets); 3170 3171 /* machine layer set ups unconnected pins and insertions */ 3172 w->connected = 1; 3173 return w; 3174 } 3175 3176 /** 3177 * snd_soc_dapm_new_controls - create new dapm controls 3178 * @dapm: DAPM context 3179 * @widget: widget array 3180 * @num: number of widgets 3181 * 3182 * Creates new DAPM controls based upon the templates. 3183 * 3184 * Returns 0 for success else error. 3185 */ 3186 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm, 3187 const struct snd_soc_dapm_widget *widget, 3188 int num) 3189 { 3190 struct snd_soc_dapm_widget *w; 3191 int i; 3192 int ret = 0; 3193 3194 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT); 3195 for (i = 0; i < num; i++) { 3196 w = snd_soc_dapm_new_control(dapm, widget); 3197 if (!w) { 3198 dev_err(dapm->dev, 3199 "ASoC: Failed to create DAPM control %s\n", 3200 widget->name); 3201 ret = -ENOMEM; 3202 break; 3203 } 3204 widget++; 3205 } 3206 mutex_unlock(&dapm->card->dapm_mutex); 3207 return ret; 3208 } 3209 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls); 3210 3211 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w, 3212 struct snd_kcontrol *kcontrol, int event) 3213 { 3214 struct snd_soc_dapm_path *source_p, *sink_p; 3215 struct snd_soc_dai *source, *sink; 3216 const struct snd_soc_pcm_stream *config = w->params; 3217 struct snd_pcm_substream substream; 3218 struct snd_pcm_hw_params *params = NULL; 3219 u64 fmt; 3220 int ret; 3221 3222 BUG_ON(!config); 3223 BUG_ON(list_empty(&w->sources) || list_empty(&w->sinks)); 3224 3225 /* We only support a single source and sink, pick the first */ 3226 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path, 3227 list_sink); 3228 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path, 3229 list_source); 3230 3231 BUG_ON(!source_p || !sink_p); 3232 BUG_ON(!sink_p->source || !source_p->sink); 3233 BUG_ON(!source_p->source || !sink_p->sink); 3234 3235 source = source_p->source->priv; 3236 sink = sink_p->sink->priv; 3237 3238 /* Be a little careful as we don't want to overflow the mask array */ 3239 if (config->formats) { 3240 fmt = ffs(config->formats) - 1; 3241 } else { 3242 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n", 3243 config->formats); 3244 fmt = 0; 3245 } 3246 3247 /* Currently very limited parameter selection */ 3248 params = kzalloc(sizeof(*params), GFP_KERNEL); 3249 if (!params) { 3250 ret = -ENOMEM; 3251 goto out; 3252 } 3253 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt); 3254 3255 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min = 3256 config->rate_min; 3257 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max = 3258 config->rate_max; 3259 3260 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min 3261 = config->channels_min; 3262 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max 3263 = config->channels_max; 3264 3265 memset(&substream, 0, sizeof(substream)); 3266 3267 switch (event) { 3268 case SND_SOC_DAPM_PRE_PMU: 3269 if (source->driver->ops && source->driver->ops->hw_params) { 3270 substream.stream = SNDRV_PCM_STREAM_CAPTURE; 3271 ret = source->driver->ops->hw_params(&substream, 3272 params, source); 3273 if (ret != 0) { 3274 dev_err(source->dev, 3275 "ASoC: hw_params() failed: %d\n", ret); 3276 goto out; 3277 } 3278 } 3279 3280 if (sink->driver->ops && sink->driver->ops->hw_params) { 3281 substream.stream = SNDRV_PCM_STREAM_PLAYBACK; 3282 ret = sink->driver->ops->hw_params(&substream, params, 3283 sink); 3284 if (ret != 0) { 3285 dev_err(sink->dev, 3286 "ASoC: hw_params() failed: %d\n", ret); 3287 goto out; 3288 } 3289 } 3290 break; 3291 3292 case SND_SOC_DAPM_POST_PMU: 3293 ret = snd_soc_dai_digital_mute(sink, 0, 3294 SNDRV_PCM_STREAM_PLAYBACK); 3295 if (ret != 0 && ret != -ENOTSUPP) 3296 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret); 3297 ret = 0; 3298 break; 3299 3300 case SND_SOC_DAPM_PRE_PMD: 3301 ret = snd_soc_dai_digital_mute(sink, 1, 3302 SNDRV_PCM_STREAM_PLAYBACK); 3303 if (ret != 0 && ret != -ENOTSUPP) 3304 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret); 3305 ret = 0; 3306 break; 3307 3308 default: 3309 BUG(); 3310 return -EINVAL; 3311 } 3312 3313 out: 3314 kfree(params); 3315 return ret; 3316 } 3317 3318 int snd_soc_dapm_new_pcm(struct snd_soc_card *card, 3319 const struct snd_soc_pcm_stream *params, 3320 struct snd_soc_dapm_widget *source, 3321 struct snd_soc_dapm_widget *sink) 3322 { 3323 struct snd_soc_dapm_route routes[2]; 3324 struct snd_soc_dapm_widget template; 3325 struct snd_soc_dapm_widget *w; 3326 size_t len; 3327 char *link_name; 3328 3329 len = strlen(source->name) + strlen(sink->name) + 2; 3330 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL); 3331 if (!link_name) 3332 return -ENOMEM; 3333 snprintf(link_name, len, "%s-%s", source->name, sink->name); 3334 3335 memset(&template, 0, sizeof(template)); 3336 template.reg = SND_SOC_NOPM; 3337 template.id = snd_soc_dapm_dai_link; 3338 template.name = link_name; 3339 template.event = snd_soc_dai_link_event; 3340 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU | 3341 SND_SOC_DAPM_PRE_PMD; 3342 3343 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name); 3344 3345 w = snd_soc_dapm_new_control(&card->dapm, &template); 3346 if (!w) { 3347 dev_err(card->dev, "ASoC: Failed to create %s widget\n", 3348 link_name); 3349 return -ENOMEM; 3350 } 3351 3352 w->params = params; 3353 3354 memset(&routes, 0, sizeof(routes)); 3355 3356 routes[0].source = source->name; 3357 routes[0].sink = link_name; 3358 routes[1].source = link_name; 3359 routes[1].sink = sink->name; 3360 3361 return snd_soc_dapm_add_routes(&card->dapm, routes, 3362 ARRAY_SIZE(routes)); 3363 } 3364 3365 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm, 3366 struct snd_soc_dai *dai) 3367 { 3368 struct snd_soc_dapm_widget template; 3369 struct snd_soc_dapm_widget *w; 3370 3371 WARN_ON(dapm->dev != dai->dev); 3372 3373 memset(&template, 0, sizeof(template)); 3374 template.reg = SND_SOC_NOPM; 3375 3376 if (dai->driver->playback.stream_name) { 3377 template.id = snd_soc_dapm_dai_in; 3378 template.name = dai->driver->playback.stream_name; 3379 template.sname = dai->driver->playback.stream_name; 3380 3381 dev_dbg(dai->dev, "ASoC: adding %s widget\n", 3382 template.name); 3383 3384 w = snd_soc_dapm_new_control(dapm, &template); 3385 if (!w) { 3386 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n", 3387 dai->driver->playback.stream_name); 3388 } 3389 3390 w->priv = dai; 3391 dai->playback_widget = w; 3392 } 3393 3394 if (dai->driver->capture.stream_name) { 3395 template.id = snd_soc_dapm_dai_out; 3396 template.name = dai->driver->capture.stream_name; 3397 template.sname = dai->driver->capture.stream_name; 3398 3399 dev_dbg(dai->dev, "ASoC: adding %s widget\n", 3400 template.name); 3401 3402 w = snd_soc_dapm_new_control(dapm, &template); 3403 if (!w) { 3404 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n", 3405 dai->driver->capture.stream_name); 3406 } 3407 3408 w->priv = dai; 3409 dai->capture_widget = w; 3410 } 3411 3412 return 0; 3413 } 3414 3415 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card) 3416 { 3417 struct snd_soc_dapm_widget *dai_w, *w; 3418 struct snd_soc_dai *dai; 3419 struct snd_soc_dapm_route r; 3420 3421 memset(&r, 0, sizeof(r)); 3422 3423 /* For each DAI widget... */ 3424 list_for_each_entry(dai_w, &card->widgets, list) { 3425 switch (dai_w->id) { 3426 case snd_soc_dapm_dai_in: 3427 case snd_soc_dapm_dai_out: 3428 break; 3429 default: 3430 continue; 3431 } 3432 3433 dai = dai_w->priv; 3434 3435 /* ...find all widgets with the same stream and link them */ 3436 list_for_each_entry(w, &card->widgets, list) { 3437 if (w->dapm != dai_w->dapm) 3438 continue; 3439 3440 switch (w->id) { 3441 case snd_soc_dapm_dai_in: 3442 case snd_soc_dapm_dai_out: 3443 continue; 3444 default: 3445 break; 3446 } 3447 3448 if (!w->sname) 3449 continue; 3450 3451 if (dai->driver->playback.stream_name && 3452 strstr(w->sname, 3453 dai->driver->playback.stream_name)) { 3454 r.source = dai->playback_widget->name; 3455 r.sink = w->name; 3456 dev_dbg(dai->dev, "%s -> %s\n", 3457 r.source, r.sink); 3458 3459 snd_soc_dapm_add_route(w->dapm, &r); 3460 } 3461 3462 if (dai->driver->capture.stream_name && 3463 strstr(w->sname, 3464 dai->driver->capture.stream_name)) { 3465 r.source = w->name; 3466 r.sink = dai->capture_widget->name; 3467 dev_dbg(dai->dev, "%s -> %s\n", 3468 r.source, r.sink); 3469 3470 snd_soc_dapm_add_route(w->dapm, &r); 3471 } 3472 } 3473 } 3474 3475 return 0; 3476 } 3477 3478 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream, 3479 int event) 3480 { 3481 3482 struct snd_soc_dapm_widget *w_cpu, *w_codec; 3483 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 3484 struct snd_soc_dai *codec_dai = rtd->codec_dai; 3485 3486 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 3487 w_cpu = cpu_dai->playback_widget; 3488 w_codec = codec_dai->playback_widget; 3489 } else { 3490 w_cpu = cpu_dai->capture_widget; 3491 w_codec = codec_dai->capture_widget; 3492 } 3493 3494 if (w_cpu) { 3495 3496 dapm_mark_dirty(w_cpu, "stream event"); 3497 3498 switch (event) { 3499 case SND_SOC_DAPM_STREAM_START: 3500 w_cpu->active = 1; 3501 break; 3502 case SND_SOC_DAPM_STREAM_STOP: 3503 w_cpu->active = 0; 3504 break; 3505 case SND_SOC_DAPM_STREAM_SUSPEND: 3506 case SND_SOC_DAPM_STREAM_RESUME: 3507 case SND_SOC_DAPM_STREAM_PAUSE_PUSH: 3508 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE: 3509 break; 3510 } 3511 } 3512 3513 if (w_codec) { 3514 3515 dapm_mark_dirty(w_codec, "stream event"); 3516 3517 switch (event) { 3518 case SND_SOC_DAPM_STREAM_START: 3519 w_codec->active = 1; 3520 break; 3521 case SND_SOC_DAPM_STREAM_STOP: 3522 w_codec->active = 0; 3523 break; 3524 case SND_SOC_DAPM_STREAM_SUSPEND: 3525 case SND_SOC_DAPM_STREAM_RESUME: 3526 case SND_SOC_DAPM_STREAM_PAUSE_PUSH: 3527 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE: 3528 break; 3529 } 3530 } 3531 3532 dapm_power_widgets(&rtd->card->dapm, event); 3533 } 3534 3535 /** 3536 * snd_soc_dapm_stream_event - send a stream event to the dapm core 3537 * @rtd: PCM runtime data 3538 * @stream: stream name 3539 * @event: stream event 3540 * 3541 * Sends a stream event to the dapm core. The core then makes any 3542 * necessary widget power changes. 3543 * 3544 * Returns 0 for success else error. 3545 */ 3546 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream, 3547 int event) 3548 { 3549 struct snd_soc_card *card = rtd->card; 3550 3551 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); 3552 soc_dapm_stream_event(rtd, stream, event); 3553 mutex_unlock(&card->dapm_mutex); 3554 } 3555 3556 /** 3557 * snd_soc_dapm_enable_pin - enable pin. 3558 * @dapm: DAPM context 3559 * @pin: pin name 3560 * 3561 * Enables input/output pin and its parents or children widgets iff there is 3562 * a valid audio route and active audio stream. 3563 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to 3564 * do any widget power switching. 3565 */ 3566 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin) 3567 { 3568 return snd_soc_dapm_set_pin(dapm, pin, 1); 3569 } 3570 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin); 3571 3572 /** 3573 * snd_soc_dapm_force_enable_pin - force a pin to be enabled 3574 * @dapm: DAPM context 3575 * @pin: pin name 3576 * 3577 * Enables input/output pin regardless of any other state. This is 3578 * intended for use with microphone bias supplies used in microphone 3579 * jack detection. 3580 * 3581 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to 3582 * do any widget power switching. 3583 */ 3584 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm, 3585 const char *pin) 3586 { 3587 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); 3588 3589 if (!w) { 3590 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin); 3591 return -EINVAL; 3592 } 3593 3594 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin); 3595 w->connected = 1; 3596 w->force = 1; 3597 dapm_mark_dirty(w, "force enable"); 3598 3599 return 0; 3600 } 3601 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin); 3602 3603 /** 3604 * snd_soc_dapm_disable_pin - disable pin. 3605 * @dapm: DAPM context 3606 * @pin: pin name 3607 * 3608 * Disables input/output pin and its parents or children widgets. 3609 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to 3610 * do any widget power switching. 3611 */ 3612 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm, 3613 const char *pin) 3614 { 3615 return snd_soc_dapm_set_pin(dapm, pin, 0); 3616 } 3617 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin); 3618 3619 /** 3620 * snd_soc_dapm_nc_pin - permanently disable pin. 3621 * @dapm: DAPM context 3622 * @pin: pin name 3623 * 3624 * Marks the specified pin as being not connected, disabling it along 3625 * any parent or child widgets. At present this is identical to 3626 * snd_soc_dapm_disable_pin() but in future it will be extended to do 3627 * additional things such as disabling controls which only affect 3628 * paths through the pin. 3629 * 3630 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to 3631 * do any widget power switching. 3632 */ 3633 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin) 3634 { 3635 return snd_soc_dapm_set_pin(dapm, pin, 0); 3636 } 3637 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin); 3638 3639 /** 3640 * snd_soc_dapm_get_pin_status - get audio pin status 3641 * @dapm: DAPM context 3642 * @pin: audio signal pin endpoint (or start point) 3643 * 3644 * Get audio pin status - connected or disconnected. 3645 * 3646 * Returns 1 for connected otherwise 0. 3647 */ 3648 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm, 3649 const char *pin) 3650 { 3651 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); 3652 3653 if (w) 3654 return w->connected; 3655 3656 return 0; 3657 } 3658 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status); 3659 3660 /** 3661 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint 3662 * @dapm: DAPM context 3663 * @pin: audio signal pin endpoint (or start point) 3664 * 3665 * Mark the given endpoint or pin as ignoring suspend. When the 3666 * system is disabled a path between two endpoints flagged as ignoring 3667 * suspend will not be disabled. The path must already be enabled via 3668 * normal means at suspend time, it will not be turned on if it was not 3669 * already enabled. 3670 */ 3671 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm, 3672 const char *pin) 3673 { 3674 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false); 3675 3676 if (!w) { 3677 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin); 3678 return -EINVAL; 3679 } 3680 3681 w->ignore_suspend = 1; 3682 3683 return 0; 3684 } 3685 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend); 3686 3687 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card, 3688 struct snd_soc_dapm_widget *w) 3689 { 3690 struct snd_soc_dapm_path *p; 3691 3692 list_for_each_entry(p, &card->paths, list) { 3693 if ((p->source == w) || (p->sink == w)) { 3694 dev_dbg(card->dev, 3695 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n", 3696 p->source->name, p->source->id, p->source->dapm, 3697 p->sink->name, p->sink->id, p->sink->dapm); 3698 3699 /* Connected to something other than the codec */ 3700 if (p->source->dapm != p->sink->dapm) 3701 return true; 3702 /* 3703 * Loopback connection from codec external pin to 3704 * codec external pin 3705 */ 3706 if (p->sink->id == snd_soc_dapm_input) { 3707 switch (p->source->id) { 3708 case snd_soc_dapm_output: 3709 case snd_soc_dapm_micbias: 3710 return true; 3711 default: 3712 break; 3713 } 3714 } 3715 } 3716 } 3717 3718 return false; 3719 } 3720 3721 /** 3722 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins 3723 * @codec: The codec whose pins should be processed 3724 * 3725 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec 3726 * which are unused. Pins are used if they are connected externally to the 3727 * codec, whether that be to some other device, or a loop-back connection to 3728 * the codec itself. 3729 */ 3730 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec) 3731 { 3732 struct snd_soc_card *card = codec->card; 3733 struct snd_soc_dapm_context *dapm = &codec->dapm; 3734 struct snd_soc_dapm_widget *w; 3735 3736 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n", 3737 &card->dapm, &codec->dapm); 3738 3739 list_for_each_entry(w, &card->widgets, list) { 3740 if (w->dapm != dapm) 3741 continue; 3742 switch (w->id) { 3743 case snd_soc_dapm_input: 3744 case snd_soc_dapm_output: 3745 case snd_soc_dapm_micbias: 3746 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n", 3747 w->name); 3748 if (!snd_soc_dapm_widget_in_card_paths(card, w)) { 3749 dev_dbg(codec->dev, 3750 "... Not in map; disabling\n"); 3751 snd_soc_dapm_nc_pin(dapm, w->name); 3752 } 3753 break; 3754 default: 3755 break; 3756 } 3757 } 3758 } 3759 3760 /** 3761 * snd_soc_dapm_free - free dapm resources 3762 * @dapm: DAPM context 3763 * 3764 * Free all dapm widgets and resources. 3765 */ 3766 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm) 3767 { 3768 snd_soc_dapm_sys_remove(dapm->dev); 3769 dapm_debugfs_cleanup(dapm); 3770 dapm_free_widgets(dapm); 3771 list_del(&dapm->list); 3772 } 3773 EXPORT_SYMBOL_GPL(snd_soc_dapm_free); 3774 3775 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm) 3776 { 3777 struct snd_soc_card *card = dapm->card; 3778 struct snd_soc_dapm_widget *w; 3779 LIST_HEAD(down_list); 3780 int powerdown = 0; 3781 3782 mutex_lock(&card->dapm_mutex); 3783 3784 list_for_each_entry(w, &dapm->card->widgets, list) { 3785 if (w->dapm != dapm) 3786 continue; 3787 if (w->power) { 3788 dapm_seq_insert(w, &down_list, false); 3789 w->power = 0; 3790 powerdown = 1; 3791 } 3792 } 3793 3794 /* If there were no widgets to power down we're already in 3795 * standby. 3796 */ 3797 if (powerdown) { 3798 if (dapm->bias_level == SND_SOC_BIAS_ON) 3799 snd_soc_dapm_set_bias_level(dapm, 3800 SND_SOC_BIAS_PREPARE); 3801 dapm_seq_run(dapm, &down_list, 0, false); 3802 if (dapm->bias_level == SND_SOC_BIAS_PREPARE) 3803 snd_soc_dapm_set_bias_level(dapm, 3804 SND_SOC_BIAS_STANDBY); 3805 } 3806 3807 mutex_unlock(&card->dapm_mutex); 3808 } 3809 3810 /* 3811 * snd_soc_dapm_shutdown - callback for system shutdown 3812 */ 3813 void snd_soc_dapm_shutdown(struct snd_soc_card *card) 3814 { 3815 struct snd_soc_codec *codec; 3816 3817 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 3818 soc_dapm_shutdown_codec(&codec->dapm); 3819 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY) 3820 snd_soc_dapm_set_bias_level(&codec->dapm, 3821 SND_SOC_BIAS_OFF); 3822 } 3823 } 3824 3825 /* Module information */ 3826 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); 3827 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC"); 3828 MODULE_LICENSE("GPL"); 3829