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