1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // soc-pcm.c -- ALSA SoC PCM 4 // 5 // Copyright 2005 Wolfson Microelectronics PLC. 6 // Copyright 2005 Openedhand Ltd. 7 // Copyright (C) 2010 Slimlogic Ltd. 8 // Copyright (C) 2010 Texas Instruments Inc. 9 // 10 // Authors: Liam Girdwood <lrg@ti.com> 11 // Mark Brown <broonie@opensource.wolfsonmicro.com> 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/pinctrl/consumer.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/slab.h> 19 #include <linux/workqueue.h> 20 #include <linux/export.h> 21 #include <linux/debugfs.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/soc-dpcm.h> 27 #include <sound/soc-link.h> 28 #include <sound/initval.h> 29 30 #define DPCM_MAX_BE_USERS 8 31 32 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 33 { 34 return (rtd)->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 35 } 36 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 37 { 38 return (rtd)->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 39 } 40 41 #ifdef CONFIG_DEBUG_FS 42 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 43 { 44 switch (state) { 45 case SND_SOC_DPCM_STATE_NEW: 46 return "new"; 47 case SND_SOC_DPCM_STATE_OPEN: 48 return "open"; 49 case SND_SOC_DPCM_STATE_HW_PARAMS: 50 return "hw_params"; 51 case SND_SOC_DPCM_STATE_PREPARE: 52 return "prepare"; 53 case SND_SOC_DPCM_STATE_START: 54 return "start"; 55 case SND_SOC_DPCM_STATE_STOP: 56 return "stop"; 57 case SND_SOC_DPCM_STATE_SUSPEND: 58 return "suspend"; 59 case SND_SOC_DPCM_STATE_PAUSED: 60 return "paused"; 61 case SND_SOC_DPCM_STATE_HW_FREE: 62 return "hw_free"; 63 case SND_SOC_DPCM_STATE_CLOSE: 64 return "close"; 65 } 66 67 return "unknown"; 68 } 69 70 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 71 int stream, char *buf, size_t size) 72 { 73 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 74 struct snd_soc_dpcm *dpcm; 75 ssize_t offset = 0; 76 unsigned long flags; 77 78 /* FE state */ 79 offset += scnprintf(buf + offset, size - offset, 80 "[%s - %s]\n", fe->dai_link->name, 81 stream ? "Capture" : "Playback"); 82 83 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 84 dpcm_state_string(fe->dpcm[stream].state)); 85 86 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 87 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 88 offset += scnprintf(buf + offset, size - offset, 89 "Hardware Params: " 90 "Format = %s, Channels = %d, Rate = %d\n", 91 snd_pcm_format_name(params_format(params)), 92 params_channels(params), 93 params_rate(params)); 94 95 /* BEs state */ 96 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 97 98 if (list_empty(&fe->dpcm[stream].be_clients)) { 99 offset += scnprintf(buf + offset, size - offset, 100 " No active DSP links\n"); 101 goto out; 102 } 103 104 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 105 for_each_dpcm_be(fe, stream, dpcm) { 106 struct snd_soc_pcm_runtime *be = dpcm->be; 107 params = &dpcm->hw_params; 108 109 offset += scnprintf(buf + offset, size - offset, 110 "- %s\n", be->dai_link->name); 111 112 offset += scnprintf(buf + offset, size - offset, 113 " State: %s\n", 114 dpcm_state_string(be->dpcm[stream].state)); 115 116 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 117 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 118 offset += scnprintf(buf + offset, size - offset, 119 " Hardware Params: " 120 "Format = %s, Channels = %d, Rate = %d\n", 121 snd_pcm_format_name(params_format(params)), 122 params_channels(params), 123 params_rate(params)); 124 } 125 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 126 out: 127 return offset; 128 } 129 130 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 131 size_t count, loff_t *ppos) 132 { 133 struct snd_soc_pcm_runtime *fe = file->private_data; 134 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 135 int stream; 136 char *buf; 137 138 if (fe->num_cpus > 1) { 139 dev_err(fe->dev, 140 "%s doesn't support Multi CPU yet\n", __func__); 141 return -EINVAL; 142 } 143 144 buf = kmalloc(out_count, GFP_KERNEL); 145 if (!buf) 146 return -ENOMEM; 147 148 for_each_pcm_streams(stream) 149 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 150 offset += dpcm_show_state(fe, stream, 151 buf + offset, 152 out_count - offset); 153 154 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 155 156 kfree(buf); 157 return ret; 158 } 159 160 static const struct file_operations dpcm_state_fops = { 161 .open = simple_open, 162 .read = dpcm_state_read_file, 163 .llseek = default_llseek, 164 }; 165 166 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 167 { 168 if (!rtd->dai_link->dynamic) 169 return; 170 171 if (!rtd->card->debugfs_card_root) 172 return; 173 174 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 175 rtd->card->debugfs_card_root); 176 177 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 178 rtd, &dpcm_state_fops); 179 } 180 181 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 182 { 183 char *name; 184 185 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 186 stream ? "capture" : "playback"); 187 if (name) { 188 dpcm->debugfs_state = debugfs_create_dir( 189 name, dpcm->fe->debugfs_dpcm_root); 190 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 191 &dpcm->state); 192 kfree(name); 193 } 194 } 195 196 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 197 { 198 debugfs_remove_recursive(dpcm->debugfs_state); 199 } 200 201 #else 202 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 203 int stream) 204 { 205 } 206 207 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 208 { 209 } 210 #endif 211 212 /* Set FE's runtime_update state; the state is protected via PCM stream lock 213 * for avoiding the race with trigger callback. 214 * If the state is unset and a trigger is pending while the previous operation, 215 * process the pending trigger action here. 216 */ 217 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 218 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 219 int stream, enum snd_soc_dpcm_update state) 220 { 221 struct snd_pcm_substream *substream = 222 snd_soc_dpcm_get_substream(fe, stream); 223 224 snd_pcm_stream_lock_irq(substream); 225 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 226 dpcm_fe_dai_do_trigger(substream, 227 fe->dpcm[stream].trigger_pending - 1); 228 fe->dpcm[stream].trigger_pending = 0; 229 } 230 fe->dpcm[stream].runtime_update = state; 231 snd_pcm_stream_unlock_irq(substream); 232 } 233 234 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 235 int stream, enum snd_soc_dpcm_update state) 236 { 237 be->dpcm[stream].runtime_update = state; 238 } 239 240 /** 241 * snd_soc_runtime_action() - Increment/Decrement active count for 242 * PCM runtime components 243 * @rtd: ASoC PCM runtime that is activated 244 * @stream: Direction of the PCM stream 245 * @action: Activate stream if 1. Deactivate if -1. 246 * 247 * Increments/Decrements the active count for all the DAIs and components 248 * attached to a PCM runtime. 249 * Should typically be called when a stream is opened. 250 * 251 * Must be called with the rtd->card->pcm_mutex being held 252 */ 253 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 254 int stream, int action) 255 { 256 struct snd_soc_dai *dai; 257 int i; 258 259 lockdep_assert_held(&rtd->card->pcm_mutex); 260 261 for_each_rtd_dais(rtd, i, dai) 262 snd_soc_dai_action(dai, stream, action); 263 } 264 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 265 266 /** 267 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 268 * @rtd: The ASoC PCM runtime that should be checked. 269 * 270 * This function checks whether the power down delay should be ignored for a 271 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 272 * been configured to ignore the delay, or if none of the components benefits 273 * from having the delay. 274 */ 275 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 276 { 277 struct snd_soc_component *component; 278 bool ignore = true; 279 int i; 280 281 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 282 return true; 283 284 for_each_rtd_components(rtd, i, component) 285 ignore &= !component->driver->use_pmdown_time; 286 287 return ignore; 288 } 289 290 /** 291 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 292 * @substream: the pcm substream 293 * @hw: the hardware parameters 294 * 295 * Sets the substream runtime hardware parameters. 296 */ 297 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 298 const struct snd_pcm_hardware *hw) 299 { 300 substream->runtime->hw = *hw; 301 302 return 0; 303 } 304 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 305 306 /* DPCM stream event, send event to FE and all active BEs. */ 307 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 308 int event) 309 { 310 struct snd_soc_dpcm *dpcm; 311 312 for_each_dpcm_be(fe, dir, dpcm) { 313 314 struct snd_soc_pcm_runtime *be = dpcm->be; 315 316 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 317 be->dai_link->name, event, dir); 318 319 if ((event == SND_SOC_DAPM_STREAM_STOP) && 320 (be->dpcm[dir].users >= 1)) 321 continue; 322 323 snd_soc_dapm_stream_event(be, dir, event); 324 } 325 326 snd_soc_dapm_stream_event(fe, dir, event); 327 328 return 0; 329 } 330 331 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 332 struct snd_pcm_hw_params *params) 333 { 334 if (params) { 335 dai->rate = params_rate(params); 336 dai->channels = params_channels(params); 337 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 338 } else { 339 dai->rate = 0; 340 dai->channels = 0; 341 dai->sample_bits = 0; 342 } 343 } 344 345 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 346 struct snd_soc_dai *soc_dai) 347 { 348 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 349 int ret; 350 351 if (!snd_soc_dai_active(soc_dai)) 352 return 0; 353 354 #define __soc_pcm_apply_symmetry(name, NAME) \ 355 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 356 rtd->dai_link->symmetric_##name)) { \ 357 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 358 #name, soc_dai->name); \ 359 \ 360 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 361 SNDRV_PCM_HW_PARAM_##NAME,\ 362 soc_dai->name); \ 363 if (ret < 0) { \ 364 dev_err(soc_dai->dev, \ 365 "ASoC: Unable to apply %s constraint: %d\n",\ 366 #name, ret); \ 367 return ret; \ 368 } \ 369 } 370 371 __soc_pcm_apply_symmetry(rate, RATE); 372 __soc_pcm_apply_symmetry(channels, CHANNELS); 373 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 374 375 return 0; 376 } 377 378 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 379 struct snd_pcm_hw_params *params) 380 { 381 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 382 struct snd_soc_dai d; 383 struct snd_soc_dai *dai; 384 struct snd_soc_dai *cpu_dai; 385 unsigned int symmetry, i; 386 387 d.name = __func__; 388 soc_pcm_set_dai_params(&d, params); 389 390 #define __soc_pcm_params_symmetry(xxx) \ 391 symmetry = rtd->dai_link->symmetric_##xxx; \ 392 for_each_rtd_dais(rtd, i, dai) \ 393 symmetry |= dai->driver->symmetric_##xxx; \ 394 \ 395 if (symmetry) \ 396 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 397 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 398 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 399 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 400 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 401 return -EINVAL; \ 402 } 403 404 /* reject unmatched parameters when applying symmetry */ 405 __soc_pcm_params_symmetry(rate); 406 __soc_pcm_params_symmetry(channels); 407 __soc_pcm_params_symmetry(sample_bits); 408 409 return 0; 410 } 411 412 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 413 { 414 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 415 struct snd_soc_dai_link *link = rtd->dai_link; 416 struct snd_soc_dai *dai; 417 unsigned int symmetry, i; 418 419 symmetry = link->symmetric_rate || 420 link->symmetric_channels || 421 link->symmetric_sample_bits; 422 423 for_each_rtd_dais(rtd, i, dai) 424 symmetry = symmetry || 425 dai->driver->symmetric_rate || 426 dai->driver->symmetric_channels || 427 dai->driver->symmetric_sample_bits; 428 429 if (symmetry) 430 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 431 } 432 433 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 434 { 435 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 436 int ret; 437 438 if (!bits) 439 return; 440 441 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 442 if (ret != 0) 443 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 444 bits, ret); 445 } 446 447 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 448 { 449 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 450 struct snd_soc_dai *cpu_dai; 451 struct snd_soc_dai *codec_dai; 452 struct snd_soc_pcm_stream *pcm_codec, *pcm_cpu; 453 int stream = substream->stream; 454 int i; 455 unsigned int bits = 0, cpu_bits = 0; 456 457 for_each_rtd_codec_dais(rtd, i, codec_dai) { 458 pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 459 460 if (pcm_codec->sig_bits == 0) { 461 bits = 0; 462 break; 463 } 464 bits = max(pcm_codec->sig_bits, bits); 465 } 466 467 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 468 pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 469 470 if (pcm_cpu->sig_bits == 0) { 471 cpu_bits = 0; 472 break; 473 } 474 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 475 } 476 477 soc_pcm_set_msb(substream, bits); 478 soc_pcm_set_msb(substream, cpu_bits); 479 } 480 481 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 482 { 483 hw->rates = UINT_MAX; 484 hw->rate_min = 0; 485 hw->rate_max = UINT_MAX; 486 hw->channels_min = 0; 487 hw->channels_max = UINT_MAX; 488 hw->formats = ULLONG_MAX; 489 } 490 491 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 492 struct snd_soc_pcm_stream *p) 493 { 494 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 495 496 /* setup hw->rate_min/max via hw->rates first */ 497 snd_pcm_hw_limit_rates(hw); 498 499 /* update hw->rate_min/max by snd_soc_pcm_stream */ 500 hw->rate_min = max(hw->rate_min, p->rate_min); 501 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 502 } 503 504 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 505 struct snd_soc_pcm_stream *p) 506 { 507 hw->channels_min = max(hw->channels_min, p->channels_min); 508 hw->channels_max = min(hw->channels_max, p->channels_max); 509 } 510 511 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 512 struct snd_soc_pcm_stream *p) 513 { 514 hw->formats &= p->formats; 515 } 516 517 /** 518 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 519 * @rtd: ASoC PCM runtime 520 * @hw: PCM hardware parameters (output) 521 * @stream: Direction of the PCM stream 522 * 523 * Calculates the subset of stream parameters supported by all DAIs 524 * associated with the PCM stream. 525 */ 526 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 527 struct snd_pcm_hardware *hw, int stream) 528 { 529 struct snd_soc_dai *codec_dai; 530 struct snd_soc_dai *cpu_dai; 531 struct snd_soc_pcm_stream *codec_stream; 532 struct snd_soc_pcm_stream *cpu_stream; 533 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 534 int i; 535 536 soc_pcm_hw_init(hw); 537 538 /* first calculate min/max only for CPUs in the DAI link */ 539 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 540 541 /* 542 * Skip CPUs which don't support the current stream type. 543 * Otherwise, since the rate, channel, and format values will 544 * zero in that case, we would have no usable settings left, 545 * causing the resulting setup to fail. 546 */ 547 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 548 continue; 549 550 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 551 552 soc_pcm_hw_update_chan(hw, cpu_stream); 553 soc_pcm_hw_update_rate(hw, cpu_stream); 554 soc_pcm_hw_update_format(hw, cpu_stream); 555 } 556 cpu_chan_min = hw->channels_min; 557 cpu_chan_max = hw->channels_max; 558 559 /* second calculate min/max only for CODECs in the DAI link */ 560 for_each_rtd_codec_dais(rtd, i, codec_dai) { 561 562 /* 563 * Skip CODECs which don't support the current stream type. 564 * Otherwise, since the rate, channel, and format values will 565 * zero in that case, we would have no usable settings left, 566 * causing the resulting setup to fail. 567 */ 568 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 569 continue; 570 571 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 572 573 soc_pcm_hw_update_chan(hw, codec_stream); 574 soc_pcm_hw_update_rate(hw, codec_stream); 575 soc_pcm_hw_update_format(hw, codec_stream); 576 } 577 578 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 579 if (!hw->channels_min) 580 return -EINVAL; 581 582 /* 583 * chan min/max cannot be enforced if there are multiple CODEC DAIs 584 * connected to CPU DAI(s), use CPU DAI's directly and let 585 * channel allocation be fixed up later 586 */ 587 if (rtd->num_codecs > 1) { 588 hw->channels_min = cpu_chan_min; 589 hw->channels_max = cpu_chan_max; 590 } 591 592 return 0; 593 } 594 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 595 596 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 597 { 598 struct snd_pcm_hardware *hw = &substream->runtime->hw; 599 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 600 u64 formats = hw->formats; 601 602 /* 603 * At least one CPU and one CODEC should match. Otherwise, we should 604 * have bailed out on a higher level, since there would be no CPU or 605 * CODEC to support the transfer direction in that case. 606 */ 607 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 608 609 if (formats) 610 hw->formats &= formats; 611 } 612 613 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 614 { 615 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 616 struct snd_soc_component *component; 617 int i, ret = 0; 618 619 for_each_rtd_components(rtd, i, component) { 620 ret = snd_soc_component_module_get_when_open(component, substream); 621 if (ret < 0) 622 break; 623 624 ret = snd_soc_component_open(component, substream); 625 if (ret < 0) 626 break; 627 } 628 629 return ret; 630 } 631 632 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 633 int rollback) 634 { 635 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 636 struct snd_soc_component *component; 637 int i, r, ret = 0; 638 639 for_each_rtd_components(rtd, i, component) { 640 r = snd_soc_component_close(component, substream, rollback); 641 if (r < 0) 642 ret = r; /* use last ret */ 643 644 snd_soc_component_module_put_when_close(component, substream, rollback); 645 } 646 647 return ret; 648 } 649 650 static int soc_pcm_clean(struct snd_pcm_substream *substream, int rollback) 651 { 652 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 653 struct snd_soc_component *component; 654 struct snd_soc_dai *dai; 655 int i; 656 657 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 658 659 if (!rollback) 660 snd_soc_runtime_deactivate(rtd, substream->stream); 661 662 for_each_rtd_dais(rtd, i, dai) 663 snd_soc_dai_shutdown(dai, substream, rollback); 664 665 snd_soc_link_shutdown(substream, rollback); 666 667 soc_pcm_components_close(substream, rollback); 668 669 670 mutex_unlock(&rtd->card->pcm_mutex); 671 672 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 673 674 for_each_rtd_components(rtd, i, component) 675 if (!snd_soc_component_active(component)) 676 pinctrl_pm_select_sleep_state(component->dev); 677 678 return 0; 679 } 680 681 /* 682 * Called by ALSA when a PCM substream is closed. Private data can be 683 * freed here. The cpu DAI, codec DAI, machine and components are also 684 * shutdown. 685 */ 686 static int soc_pcm_close(struct snd_pcm_substream *substream) 687 { 688 return soc_pcm_clean(substream, 0); 689 } 690 691 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 692 { 693 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 694 struct snd_pcm_hardware *hw = &substream->runtime->hw; 695 const char *name_cpu = soc_cpu_dai_name(rtd); 696 const char *name_codec = soc_codec_dai_name(rtd); 697 const char *err_msg; 698 struct device *dev = rtd->dev; 699 700 err_msg = "rates"; 701 if (!hw->rates) 702 goto config_err; 703 704 err_msg = "formats"; 705 if (!hw->formats) 706 goto config_err; 707 708 err_msg = "channels"; 709 if (!hw->channels_min || !hw->channels_max || 710 hw->channels_min > hw->channels_max) 711 goto config_err; 712 713 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 714 name_cpu); 715 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 716 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 717 hw->channels_max); 718 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 719 hw->rate_max); 720 721 return 0; 722 723 config_err: 724 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 725 name_codec, name_cpu, err_msg); 726 return -EINVAL; 727 } 728 729 /* 730 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 731 * then initialized and any private data can be allocated. This also calls 732 * startup for the cpu DAI, component, machine and codec DAI. 733 */ 734 static int soc_pcm_open(struct snd_pcm_substream *substream) 735 { 736 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 737 struct snd_soc_component *component; 738 struct snd_soc_dai *dai; 739 int i, ret = 0; 740 741 for_each_rtd_components(rtd, i, component) 742 pinctrl_pm_select_default_state(component->dev); 743 744 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 745 if (ret < 0) 746 goto pm_err; 747 748 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 749 750 ret = soc_pcm_components_open(substream); 751 if (ret < 0) 752 goto err; 753 754 ret = snd_soc_link_startup(substream); 755 if (ret < 0) 756 goto err; 757 758 /* startup the audio subsystem */ 759 for_each_rtd_dais(rtd, i, dai) { 760 ret = snd_soc_dai_startup(dai, substream); 761 if (ret < 0) 762 goto err; 763 764 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 765 dai->tx_mask = 0; 766 else 767 dai->rx_mask = 0; 768 } 769 770 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 771 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 772 goto dynamic; 773 774 /* Check that the codec and cpu DAIs are compatible */ 775 soc_pcm_init_runtime_hw(substream); 776 777 soc_pcm_update_symmetry(substream); 778 779 ret = soc_hw_sanity_check(substream); 780 if (ret < 0) 781 goto err; 782 783 soc_pcm_apply_msb(substream); 784 785 /* Symmetry only applies if we've already got an active stream. */ 786 for_each_rtd_dais(rtd, i, dai) { 787 ret = soc_pcm_apply_symmetry(substream, dai); 788 if (ret != 0) 789 goto err; 790 } 791 dynamic: 792 snd_soc_runtime_activate(rtd, substream->stream); 793 ret = 0; 794 err: 795 mutex_unlock(&rtd->card->pcm_mutex); 796 pm_err: 797 if (ret < 0) { 798 soc_pcm_clean(substream, 1); 799 dev_err(rtd->dev, "%s() failed (%d)", __func__, ret); 800 } 801 802 return ret; 803 } 804 805 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd) 806 { 807 /* 808 * Currently nothing to do for c2c links 809 * Since c2c links are internal nodes in the DAPM graph and 810 * don't interface with the outside world or application layer 811 * we don't have to do any special handling on close. 812 */ 813 } 814 815 /* 816 * Called by ALSA when the PCM substream is prepared, can set format, sample 817 * rate, etc. This function is non atomic and can be called multiple times, 818 * it can refer to the runtime info. 819 */ 820 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 821 { 822 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 823 struct snd_soc_dai *dai; 824 int i, ret = 0; 825 826 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 827 828 ret = snd_soc_link_prepare(substream); 829 if (ret < 0) 830 goto out; 831 832 ret = snd_soc_pcm_component_prepare(substream); 833 if (ret < 0) 834 goto out; 835 836 ret = snd_soc_pcm_dai_prepare(substream); 837 if (ret < 0) 838 goto out; 839 840 /* cancel any delayed stream shutdown that is pending */ 841 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 842 rtd->pop_wait) { 843 rtd->pop_wait = 0; 844 cancel_delayed_work(&rtd->delayed_work); 845 } 846 847 snd_soc_dapm_stream_event(rtd, substream->stream, 848 SND_SOC_DAPM_STREAM_START); 849 850 for_each_rtd_dais(rtd, i, dai) 851 snd_soc_dai_digital_mute(dai, 0, substream->stream); 852 853 out: 854 mutex_unlock(&rtd->card->pcm_mutex); 855 856 if (ret < 0) 857 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 858 859 return ret; 860 } 861 862 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 863 unsigned int mask) 864 { 865 struct snd_interval *interval; 866 int channels = hweight_long(mask); 867 868 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 869 interval->min = channels; 870 interval->max = channels; 871 } 872 873 static int soc_pcm_hw_clean(struct snd_pcm_substream *substream, int rollback) 874 { 875 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 876 struct snd_soc_dai *dai; 877 int i; 878 879 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 880 881 /* clear the corresponding DAIs parameters when going to be inactive */ 882 for_each_rtd_dais(rtd, i, dai) { 883 int active = snd_soc_dai_stream_active(dai, substream->stream); 884 885 if (snd_soc_dai_active(dai) == 1) 886 soc_pcm_set_dai_params(dai, NULL); 887 888 if (active == 1) 889 snd_soc_dai_digital_mute(dai, 1, substream->stream); 890 } 891 892 /* run the stream event */ 893 snd_soc_dapm_stream_stop(rtd, substream->stream); 894 895 /* free any machine hw params */ 896 snd_soc_link_hw_free(substream, rollback); 897 898 /* free any component resources */ 899 snd_soc_pcm_component_hw_free(substream, rollback); 900 901 /* now free hw params for the DAIs */ 902 for_each_rtd_dais(rtd, i, dai) { 903 if (!snd_soc_dai_stream_valid(dai, substream->stream)) 904 continue; 905 906 snd_soc_dai_hw_free(dai, substream, rollback); 907 } 908 909 mutex_unlock(&rtd->card->pcm_mutex); 910 return 0; 911 } 912 913 /* 914 * Frees resources allocated by hw_params, can be called multiple times 915 */ 916 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 917 { 918 return soc_pcm_hw_clean(substream, 0); 919 } 920 921 /* 922 * Called by ALSA when the hardware params are set by application. This 923 * function can also be called multiple times and can allocate buffers 924 * (using snd_pcm_lib_* ). It's non-atomic. 925 */ 926 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 927 struct snd_pcm_hw_params *params) 928 { 929 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 930 struct snd_soc_dai *cpu_dai; 931 struct snd_soc_dai *codec_dai; 932 int i, ret = 0; 933 934 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 935 936 ret = soc_pcm_params_symmetry(substream, params); 937 if (ret) 938 goto out; 939 940 ret = snd_soc_link_hw_params(substream, params); 941 if (ret < 0) 942 goto out; 943 944 for_each_rtd_codec_dais(rtd, i, codec_dai) { 945 struct snd_pcm_hw_params codec_params; 946 947 /* 948 * Skip CODECs which don't support the current stream type, 949 * the idea being that if a CODEC is not used for the currently 950 * set up transfer direction, it should not need to be 951 * configured, especially since the configuration used might 952 * not even be supported by that CODEC. There may be cases 953 * however where a CODEC needs to be set up although it is 954 * actually not being used for the transfer, e.g. if a 955 * capture-only CODEC is acting as an LRCLK and/or BCLK master 956 * for the DAI link including a playback-only CODEC. 957 * If this becomes necessary, we will have to augment the 958 * machine driver setup with information on how to act, so 959 * we can do the right thing here. 960 */ 961 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 962 continue; 963 964 /* copy params for each codec */ 965 codec_params = *params; 966 967 /* fixup params based on TDM slot masks */ 968 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 969 codec_dai->tx_mask) 970 soc_pcm_codec_params_fixup(&codec_params, 971 codec_dai->tx_mask); 972 973 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 974 codec_dai->rx_mask) 975 soc_pcm_codec_params_fixup(&codec_params, 976 codec_dai->rx_mask); 977 978 ret = snd_soc_dai_hw_params(codec_dai, substream, 979 &codec_params); 980 if(ret < 0) 981 goto out; 982 983 soc_pcm_set_dai_params(codec_dai, &codec_params); 984 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 985 } 986 987 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 988 /* 989 * Skip CPUs which don't support the current stream 990 * type. See soc_pcm_init_runtime_hw() for more details 991 */ 992 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 993 continue; 994 995 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 996 if (ret < 0) 997 goto out; 998 999 /* store the parameters for each DAI */ 1000 soc_pcm_set_dai_params(cpu_dai, params); 1001 snd_soc_dapm_update_dai(substream, params, cpu_dai); 1002 } 1003 1004 ret = snd_soc_pcm_component_hw_params(substream, params); 1005 out: 1006 mutex_unlock(&rtd->card->pcm_mutex); 1007 1008 if (ret < 0) { 1009 soc_pcm_hw_clean(substream, 1); 1010 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 1011 } 1012 1013 return ret; 1014 } 1015 1016 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1017 { 1018 int ret = -EINVAL, _ret = 0; 1019 int rollback = 0; 1020 1021 switch (cmd) { 1022 case SNDRV_PCM_TRIGGER_START: 1023 case SNDRV_PCM_TRIGGER_RESUME: 1024 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1025 ret = snd_soc_link_trigger(substream, cmd, 0); 1026 if (ret < 0) 1027 goto start_err; 1028 1029 ret = snd_soc_pcm_component_trigger(substream, cmd, 0); 1030 if (ret < 0) 1031 goto start_err; 1032 1033 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); 1034 start_err: 1035 if (ret < 0) 1036 rollback = 1; 1037 } 1038 1039 if (rollback) { 1040 _ret = ret; 1041 switch (cmd) { 1042 case SNDRV_PCM_TRIGGER_START: 1043 cmd = SNDRV_PCM_TRIGGER_STOP; 1044 break; 1045 case SNDRV_PCM_TRIGGER_RESUME: 1046 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1047 break; 1048 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1049 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1050 break; 1051 } 1052 } 1053 1054 switch (cmd) { 1055 case SNDRV_PCM_TRIGGER_STOP: 1056 case SNDRV_PCM_TRIGGER_SUSPEND: 1057 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1058 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1059 if (ret < 0) 1060 break; 1061 1062 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1063 if (ret < 0) 1064 break; 1065 1066 ret = snd_soc_link_trigger(substream, cmd, rollback); 1067 break; 1068 } 1069 1070 if (_ret) 1071 ret = _ret; 1072 1073 return ret; 1074 } 1075 1076 /* 1077 * soc level wrapper for pointer callback 1078 * If cpu_dai, codec_dai, component driver has the delay callback, then 1079 * the runtime->delay will be updated accordingly. 1080 */ 1081 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1082 { 1083 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1084 struct snd_soc_dai *cpu_dai; 1085 struct snd_soc_dai *codec_dai; 1086 struct snd_pcm_runtime *runtime = substream->runtime; 1087 snd_pcm_uframes_t offset = 0; 1088 snd_pcm_sframes_t delay = 0; 1089 snd_pcm_sframes_t codec_delay = 0; 1090 snd_pcm_sframes_t cpu_delay = 0; 1091 int i; 1092 1093 /* clearing the previous total delay */ 1094 runtime->delay = 0; 1095 1096 offset = snd_soc_pcm_component_pointer(substream); 1097 1098 /* base delay if assigned in pointer callback */ 1099 delay = runtime->delay; 1100 1101 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1102 cpu_delay = max(cpu_delay, 1103 snd_soc_dai_delay(cpu_dai, substream)); 1104 } 1105 delay += cpu_delay; 1106 1107 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1108 codec_delay = max(codec_delay, 1109 snd_soc_dai_delay(codec_dai, substream)); 1110 } 1111 delay += codec_delay; 1112 1113 runtime->delay = delay; 1114 1115 return offset; 1116 } 1117 1118 /* connect a FE and BE */ 1119 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1120 struct snd_soc_pcm_runtime *be, int stream) 1121 { 1122 struct snd_soc_dpcm *dpcm; 1123 unsigned long flags; 1124 1125 /* only add new dpcms */ 1126 for_each_dpcm_be(fe, stream, dpcm) { 1127 if (dpcm->be == be && dpcm->fe == fe) 1128 return 0; 1129 } 1130 1131 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1132 if (!dpcm) 1133 return -ENOMEM; 1134 1135 dpcm->be = be; 1136 dpcm->fe = fe; 1137 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1138 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1139 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1140 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1141 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1142 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1143 1144 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1145 stream ? "capture" : "playback", fe->dai_link->name, 1146 stream ? "<-" : "->", be->dai_link->name); 1147 1148 dpcm_create_debugfs_state(dpcm, stream); 1149 1150 return 1; 1151 } 1152 1153 /* reparent a BE onto another FE */ 1154 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1155 struct snd_soc_pcm_runtime *be, int stream) 1156 { 1157 struct snd_soc_dpcm *dpcm; 1158 struct snd_pcm_substream *fe_substream, *be_substream; 1159 1160 /* reparent if BE is connected to other FEs */ 1161 if (!be->dpcm[stream].users) 1162 return; 1163 1164 be_substream = snd_soc_dpcm_get_substream(be, stream); 1165 1166 for_each_dpcm_fe(be, stream, dpcm) { 1167 if (dpcm->fe == fe) 1168 continue; 1169 1170 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1171 stream ? "capture" : "playback", 1172 dpcm->fe->dai_link->name, 1173 stream ? "<-" : "->", dpcm->be->dai_link->name); 1174 1175 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1176 be_substream->runtime = fe_substream->runtime; 1177 break; 1178 } 1179 } 1180 1181 /* disconnect a BE and FE */ 1182 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1183 { 1184 struct snd_soc_dpcm *dpcm, *d; 1185 unsigned long flags; 1186 1187 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1188 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1189 stream ? "capture" : "playback", 1190 dpcm->be->dai_link->name); 1191 1192 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1193 continue; 1194 1195 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1196 stream ? "capture" : "playback", fe->dai_link->name, 1197 stream ? "<-" : "->", dpcm->be->dai_link->name); 1198 1199 /* BEs still alive need new FE */ 1200 dpcm_be_reparent(fe, dpcm->be, stream); 1201 1202 dpcm_remove_debugfs_state(dpcm); 1203 1204 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1205 list_del(&dpcm->list_be); 1206 list_del(&dpcm->list_fe); 1207 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1208 kfree(dpcm); 1209 } 1210 } 1211 1212 /* get BE for DAI widget and stream */ 1213 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1214 struct snd_soc_dapm_widget *widget, int stream) 1215 { 1216 struct snd_soc_pcm_runtime *be; 1217 struct snd_soc_dapm_widget *w; 1218 struct snd_soc_dai *dai; 1219 int i; 1220 1221 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1222 1223 for_each_card_rtds(card, be) { 1224 1225 if (!be->dai_link->no_pcm) 1226 continue; 1227 1228 for_each_rtd_dais(be, i, dai) { 1229 w = snd_soc_dai_get_widget(dai, stream); 1230 1231 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1232 w ? w->name : "(not set)"); 1233 1234 if (w == widget) 1235 return be; 1236 } 1237 } 1238 1239 /* Widget provided is not a BE */ 1240 return NULL; 1241 } 1242 1243 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1244 struct snd_soc_dapm_widget *widget) 1245 { 1246 struct snd_soc_dapm_widget *w; 1247 int i; 1248 1249 for_each_dapm_widgets(list, i, w) 1250 if (widget == w) 1251 return 1; 1252 1253 return 0; 1254 } 1255 1256 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, 1257 enum snd_soc_dapm_direction dir) 1258 { 1259 struct snd_soc_card *card = widget->dapm->card; 1260 struct snd_soc_pcm_runtime *rtd; 1261 int stream; 1262 1263 /* adjust dir to stream */ 1264 if (dir == SND_SOC_DAPM_DIR_OUT) 1265 stream = SNDRV_PCM_STREAM_PLAYBACK; 1266 else 1267 stream = SNDRV_PCM_STREAM_CAPTURE; 1268 1269 rtd = dpcm_get_be(card, widget, stream); 1270 if (rtd) 1271 return true; 1272 1273 return false; 1274 } 1275 1276 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1277 int stream, struct snd_soc_dapm_widget_list **list) 1278 { 1279 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1280 int paths; 1281 1282 if (fe->num_cpus > 1) { 1283 dev_err(fe->dev, 1284 "%s doesn't support Multi CPU yet\n", __func__); 1285 return -EINVAL; 1286 } 1287 1288 /* get number of valid DAI paths and their widgets */ 1289 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1290 fe->card->component_chaining ? 1291 NULL : dpcm_end_walk_at_be); 1292 1293 if (paths > 0) 1294 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1295 stream ? "capture" : "playback"); 1296 else if (paths == 0) 1297 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1298 stream ? "capture" : "playback"); 1299 1300 return paths; 1301 } 1302 1303 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1304 { 1305 snd_soc_dapm_dai_free_widgets(list); 1306 } 1307 1308 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1309 struct snd_soc_dapm_widget_list *list) 1310 { 1311 struct snd_soc_dapm_widget *widget; 1312 struct snd_soc_dai *dai; 1313 unsigned int i; 1314 1315 /* is there a valid DAI widget for this BE */ 1316 for_each_rtd_dais(dpcm->be, i, dai) { 1317 widget = snd_soc_dai_get_widget(dai, stream); 1318 1319 /* 1320 * The BE is pruned only if none of the dai 1321 * widgets are in the active list. 1322 */ 1323 if (widget && widget_in_list(list, widget)) 1324 return true; 1325 } 1326 1327 return false; 1328 } 1329 1330 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1331 struct snd_soc_dapm_widget_list **list_) 1332 { 1333 struct snd_soc_dpcm *dpcm; 1334 int prune = 0; 1335 1336 /* Destroy any old FE <--> BE connections */ 1337 for_each_dpcm_be(fe, stream, dpcm) { 1338 if (dpcm_be_is_active(dpcm, stream, *list_)) 1339 continue; 1340 1341 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1342 stream ? "capture" : "playback", 1343 dpcm->be->dai_link->name, fe->dai_link->name); 1344 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1345 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1346 prune++; 1347 } 1348 1349 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1350 return prune; 1351 } 1352 1353 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1354 struct snd_soc_dapm_widget_list **list_) 1355 { 1356 struct snd_soc_card *card = fe->card; 1357 struct snd_soc_dapm_widget_list *list = *list_; 1358 struct snd_soc_pcm_runtime *be; 1359 struct snd_soc_dapm_widget *widget; 1360 int i, new = 0, err; 1361 1362 /* Create any new FE <--> BE connections */ 1363 for_each_dapm_widgets(list, i, widget) { 1364 1365 switch (widget->id) { 1366 case snd_soc_dapm_dai_in: 1367 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1368 continue; 1369 break; 1370 case snd_soc_dapm_dai_out: 1371 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1372 continue; 1373 break; 1374 default: 1375 continue; 1376 } 1377 1378 /* is there a valid BE rtd for this widget */ 1379 be = dpcm_get_be(card, widget, stream); 1380 if (!be) { 1381 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1382 widget->name); 1383 continue; 1384 } 1385 1386 /* don't connect if FE is not running */ 1387 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1388 continue; 1389 1390 /* newly connected FE and BE */ 1391 err = dpcm_be_connect(fe, be, stream); 1392 if (err < 0) { 1393 dev_err(fe->dev, "ASoC: can't connect %s\n", 1394 widget->name); 1395 break; 1396 } else if (err == 0) /* already connected */ 1397 continue; 1398 1399 /* new */ 1400 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1401 new++; 1402 } 1403 1404 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1405 return new; 1406 } 1407 1408 /* 1409 * Find the corresponding BE DAIs that source or sink audio to this 1410 * FE substream. 1411 */ 1412 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1413 int stream, struct snd_soc_dapm_widget_list **list, int new) 1414 { 1415 if (new) 1416 return dpcm_add_paths(fe, stream, list); 1417 else 1418 return dpcm_prune_paths(fe, stream, list); 1419 } 1420 1421 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1422 { 1423 struct snd_soc_dpcm *dpcm; 1424 unsigned long flags; 1425 1426 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1427 for_each_dpcm_be(fe, stream, dpcm) 1428 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1429 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1430 } 1431 1432 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1433 int do_hw_free, struct snd_soc_dpcm *last) 1434 { 1435 struct snd_soc_dpcm *dpcm; 1436 1437 /* disable any enabled and non active backends */ 1438 for_each_dpcm_be(fe, stream, dpcm) { 1439 struct snd_soc_pcm_runtime *be = dpcm->be; 1440 struct snd_pcm_substream *be_substream = 1441 snd_soc_dpcm_get_substream(be, stream); 1442 1443 if (dpcm == last) 1444 return; 1445 1446 /* is this op for this BE ? */ 1447 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1448 continue; 1449 1450 if (be->dpcm[stream].users == 0) { 1451 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1452 stream ? "capture" : "playback", 1453 be->dpcm[stream].state); 1454 continue; 1455 } 1456 1457 if (--be->dpcm[stream].users != 0) 1458 continue; 1459 1460 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1461 if (!do_hw_free) 1462 continue; 1463 1464 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1465 soc_pcm_hw_free(be_substream); 1466 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1467 } 1468 } 1469 1470 soc_pcm_close(be_substream); 1471 be_substream->runtime = NULL; 1472 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1473 } 1474 } 1475 1476 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1477 { 1478 struct snd_soc_pcm_runtime *be; 1479 struct snd_soc_dpcm *dpcm; 1480 int err, count = 0; 1481 1482 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1483 for_each_dpcm_be(fe, stream, dpcm) { 1484 struct snd_pcm_substream *be_substream; 1485 1486 be = dpcm->be; 1487 be_substream = snd_soc_dpcm_get_substream(be, stream); 1488 1489 if (!be_substream) { 1490 dev_err(be->dev, "ASoC: no backend %s stream\n", 1491 stream ? "capture" : "playback"); 1492 continue; 1493 } 1494 1495 /* is this op for this BE ? */ 1496 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1497 continue; 1498 1499 /* first time the dpcm is open ? */ 1500 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1501 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1502 stream ? "capture" : "playback", 1503 be->dpcm[stream].state); 1504 continue; 1505 } 1506 1507 if (be->dpcm[stream].users++ != 0) 1508 continue; 1509 1510 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1511 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1512 continue; 1513 1514 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1515 stream ? "capture" : "playback", be->dai_link->name); 1516 1517 be_substream->runtime = be->dpcm[stream].runtime; 1518 err = soc_pcm_open(be_substream); 1519 if (err < 0) { 1520 be->dpcm[stream].users--; 1521 if (be->dpcm[stream].users < 0) 1522 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1523 stream ? "capture" : "playback", 1524 be->dpcm[stream].state); 1525 1526 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1527 goto unwind; 1528 } 1529 1530 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1531 count++; 1532 } 1533 1534 return count; 1535 1536 unwind: 1537 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1538 1539 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 1540 __func__, be->dai_link->name, err); 1541 1542 return err; 1543 } 1544 1545 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1546 { 1547 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1548 struct snd_pcm_runtime *runtime = substream->runtime; 1549 struct snd_pcm_hardware *hw = &runtime->hw; 1550 struct snd_soc_dai *dai; 1551 int stream = substream->stream; 1552 int i; 1553 1554 soc_pcm_hw_init(hw); 1555 1556 for_each_rtd_cpu_dais(fe, i, dai) { 1557 struct snd_soc_pcm_stream *cpu_stream; 1558 1559 /* 1560 * Skip CPUs which don't support the current stream 1561 * type. See soc_pcm_init_runtime_hw() for more details 1562 */ 1563 if (!snd_soc_dai_stream_valid(dai, stream)) 1564 continue; 1565 1566 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1567 1568 soc_pcm_hw_update_rate(hw, cpu_stream); 1569 soc_pcm_hw_update_chan(hw, cpu_stream); 1570 soc_pcm_hw_update_format(hw, cpu_stream); 1571 } 1572 1573 } 1574 1575 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1576 { 1577 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1578 struct snd_pcm_runtime *runtime = substream->runtime; 1579 struct snd_pcm_hardware *hw = &runtime->hw; 1580 struct snd_soc_dpcm *dpcm; 1581 struct snd_soc_dai *dai; 1582 int stream = substream->stream; 1583 1584 if (!fe->dai_link->dpcm_merged_format) 1585 return; 1586 1587 /* 1588 * It returns merged BE codec format 1589 * if FE want to use it (= dpcm_merged_format) 1590 */ 1591 1592 for_each_dpcm_be(fe, stream, dpcm) { 1593 struct snd_soc_pcm_runtime *be = dpcm->be; 1594 struct snd_soc_pcm_stream *codec_stream; 1595 int i; 1596 1597 for_each_rtd_codec_dais(be, i, dai) { 1598 /* 1599 * Skip CODECs which don't support the current stream 1600 * type. See soc_pcm_init_runtime_hw() for more details 1601 */ 1602 if (!snd_soc_dai_stream_valid(dai, stream)) 1603 continue; 1604 1605 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1606 1607 soc_pcm_hw_update_format(hw, codec_stream); 1608 } 1609 } 1610 } 1611 1612 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1613 { 1614 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1615 struct snd_pcm_runtime *runtime = substream->runtime; 1616 struct snd_pcm_hardware *hw = &runtime->hw; 1617 struct snd_soc_dpcm *dpcm; 1618 int stream = substream->stream; 1619 1620 if (!fe->dai_link->dpcm_merged_chan) 1621 return; 1622 1623 /* 1624 * It returns merged BE codec channel; 1625 * if FE want to use it (= dpcm_merged_chan) 1626 */ 1627 1628 for_each_dpcm_be(fe, stream, dpcm) { 1629 struct snd_soc_pcm_runtime *be = dpcm->be; 1630 struct snd_soc_pcm_stream *codec_stream; 1631 struct snd_soc_pcm_stream *cpu_stream; 1632 struct snd_soc_dai *dai; 1633 int i; 1634 1635 for_each_rtd_cpu_dais(be, i, dai) { 1636 /* 1637 * Skip CPUs which don't support the current stream 1638 * type. See soc_pcm_init_runtime_hw() for more details 1639 */ 1640 if (!snd_soc_dai_stream_valid(dai, stream)) 1641 continue; 1642 1643 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1644 1645 soc_pcm_hw_update_chan(hw, cpu_stream); 1646 } 1647 1648 /* 1649 * chan min/max cannot be enforced if there are multiple CODEC 1650 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1651 */ 1652 if (be->num_codecs == 1) { 1653 codec_stream = snd_soc_dai_get_pcm_stream(asoc_rtd_to_codec(be, 0), stream); 1654 1655 soc_pcm_hw_update_chan(hw, codec_stream); 1656 } 1657 } 1658 } 1659 1660 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1661 { 1662 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1663 struct snd_pcm_runtime *runtime = substream->runtime; 1664 struct snd_pcm_hardware *hw = &runtime->hw; 1665 struct snd_soc_dpcm *dpcm; 1666 int stream = substream->stream; 1667 1668 if (!fe->dai_link->dpcm_merged_rate) 1669 return; 1670 1671 /* 1672 * It returns merged BE codec channel; 1673 * if FE want to use it (= dpcm_merged_chan) 1674 */ 1675 1676 for_each_dpcm_be(fe, stream, dpcm) { 1677 struct snd_soc_pcm_runtime *be = dpcm->be; 1678 struct snd_soc_pcm_stream *pcm; 1679 struct snd_soc_dai *dai; 1680 int i; 1681 1682 for_each_rtd_dais(be, i, dai) { 1683 /* 1684 * Skip DAIs which don't support the current stream 1685 * type. See soc_pcm_init_runtime_hw() for more details 1686 */ 1687 if (!snd_soc_dai_stream_valid(dai, stream)) 1688 continue; 1689 1690 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1691 1692 soc_pcm_hw_update_rate(hw, pcm); 1693 } 1694 } 1695 } 1696 1697 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1698 int stream) 1699 { 1700 struct snd_soc_dpcm *dpcm; 1701 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1702 struct snd_soc_dai *fe_cpu_dai; 1703 int err; 1704 int i; 1705 1706 /* apply symmetry for FE */ 1707 soc_pcm_update_symmetry(fe_substream); 1708 1709 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1710 /* Symmetry only applies if we've got an active stream. */ 1711 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1712 if (err < 0) 1713 goto error; 1714 } 1715 1716 /* apply symmetry for BE */ 1717 for_each_dpcm_be(fe, stream, dpcm) { 1718 struct snd_soc_pcm_runtime *be = dpcm->be; 1719 struct snd_pcm_substream *be_substream = 1720 snd_soc_dpcm_get_substream(be, stream); 1721 struct snd_soc_pcm_runtime *rtd; 1722 struct snd_soc_dai *dai; 1723 1724 /* A backend may not have the requested substream */ 1725 if (!be_substream) 1726 continue; 1727 1728 rtd = asoc_substream_to_rtd(be_substream); 1729 if (rtd->dai_link->be_hw_params_fixup) 1730 continue; 1731 1732 soc_pcm_update_symmetry(be_substream); 1733 1734 /* Symmetry only applies if we've got an active stream. */ 1735 for_each_rtd_dais(rtd, i, dai) { 1736 err = soc_pcm_apply_symmetry(fe_substream, dai); 1737 if (err < 0) 1738 goto error; 1739 } 1740 } 1741 error: 1742 if (err < 0) 1743 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, err); 1744 1745 return err; 1746 } 1747 1748 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1749 { 1750 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1751 int stream = fe_substream->stream, ret = 0; 1752 1753 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1754 1755 ret = dpcm_be_dai_startup(fe, stream); 1756 if (ret < 0) 1757 goto be_err; 1758 1759 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1760 1761 /* start the DAI frontend */ 1762 ret = soc_pcm_open(fe_substream); 1763 if (ret < 0) 1764 goto unwind; 1765 1766 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1767 1768 dpcm_runtime_setup_fe(fe_substream); 1769 1770 dpcm_runtime_setup_be_format(fe_substream); 1771 dpcm_runtime_setup_be_chan(fe_substream); 1772 dpcm_runtime_setup_be_rate(fe_substream); 1773 1774 ret = dpcm_apply_symmetry(fe_substream, stream); 1775 1776 unwind: 1777 if (ret < 0) 1778 dpcm_be_dai_startup_unwind(fe, stream); 1779 be_err: 1780 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1781 1782 if (ret < 0) 1783 dev_err(fe->dev, "%s() failed (%d)\n", __func__, ret); 1784 1785 return ret; 1786 } 1787 1788 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1789 { 1790 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1791 int stream = substream->stream; 1792 1793 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1794 1795 /* shutdown the BEs */ 1796 dpcm_be_dai_shutdown(fe, stream); 1797 1798 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1799 1800 /* now shutdown the frontend */ 1801 soc_pcm_close(substream); 1802 1803 /* run the stream stop event */ 1804 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1805 1806 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1807 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1808 return 0; 1809 } 1810 1811 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1812 { 1813 struct snd_soc_dpcm *dpcm; 1814 1815 /* only hw_params backends that are either sinks or sources 1816 * to this frontend DAI */ 1817 for_each_dpcm_be(fe, stream, dpcm) { 1818 1819 struct snd_soc_pcm_runtime *be = dpcm->be; 1820 struct snd_pcm_substream *be_substream = 1821 snd_soc_dpcm_get_substream(be, stream); 1822 1823 /* is this op for this BE ? */ 1824 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1825 continue; 1826 1827 /* only free hw when no longer used - check all FEs */ 1828 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1829 continue; 1830 1831 /* do not free hw if this BE is used by other FE */ 1832 if (be->dpcm[stream].users > 1) 1833 continue; 1834 1835 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1836 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1837 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1838 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1839 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1840 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1841 continue; 1842 1843 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1844 be->dai_link->name); 1845 1846 soc_pcm_hw_free(be_substream); 1847 1848 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1849 } 1850 } 1851 1852 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1853 { 1854 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1855 int stream = substream->stream; 1856 1857 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1858 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1859 1860 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1861 1862 /* call hw_free on the frontend */ 1863 soc_pcm_hw_free(substream); 1864 1865 /* only hw_params backends that are either sinks or sources 1866 * to this frontend DAI */ 1867 dpcm_be_dai_hw_free(fe, stream); 1868 1869 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1870 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1871 1872 mutex_unlock(&fe->card->mutex); 1873 return 0; 1874 } 1875 1876 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1877 { 1878 struct snd_soc_pcm_runtime *be; 1879 struct snd_pcm_substream *be_substream; 1880 struct snd_soc_dpcm *dpcm; 1881 int ret; 1882 1883 for_each_dpcm_be(fe, stream, dpcm) { 1884 be = dpcm->be; 1885 be_substream = snd_soc_dpcm_get_substream(be, stream); 1886 1887 /* is this op for this BE ? */ 1888 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1889 continue; 1890 1891 /* copy params for each dpcm */ 1892 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1893 sizeof(struct snd_pcm_hw_params)); 1894 1895 /* perform any hw_params fixups */ 1896 ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params); 1897 if (ret < 0) 1898 goto unwind; 1899 1900 /* copy the fixed-up hw params for BE dai */ 1901 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 1902 sizeof(struct snd_pcm_hw_params)); 1903 1904 /* only allow hw_params() if no connected FEs are running */ 1905 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 1906 continue; 1907 1908 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1909 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1910 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 1911 continue; 1912 1913 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 1914 be->dai_link->name); 1915 1916 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 1917 if (ret < 0) 1918 goto unwind; 1919 1920 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1921 } 1922 return 0; 1923 1924 unwind: 1925 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 1926 __func__, be->dai_link->name, ret); 1927 1928 /* disable any enabled and non active backends */ 1929 for_each_dpcm_be_rollback(fe, stream, dpcm) { 1930 be = dpcm->be; 1931 be_substream = snd_soc_dpcm_get_substream(be, stream); 1932 1933 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1934 continue; 1935 1936 /* only allow hw_free() if no connected FEs are running */ 1937 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1938 continue; 1939 1940 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1941 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1942 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1943 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1944 continue; 1945 1946 soc_pcm_hw_free(be_substream); 1947 } 1948 1949 return ret; 1950 } 1951 1952 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 1953 struct snd_pcm_hw_params *params) 1954 { 1955 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1956 int ret, stream = substream->stream; 1957 1958 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1959 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1960 1961 memcpy(&fe->dpcm[stream].hw_params, params, 1962 sizeof(struct snd_pcm_hw_params)); 1963 ret = dpcm_be_dai_hw_params(fe, stream); 1964 if (ret < 0) 1965 goto out; 1966 1967 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 1968 fe->dai_link->name, params_rate(params), 1969 params_channels(params), params_format(params)); 1970 1971 /* call hw_params on the frontend */ 1972 ret = soc_pcm_hw_params(substream, params); 1973 if (ret < 0) 1974 dpcm_be_dai_hw_free(fe, stream); 1975 else 1976 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1977 1978 out: 1979 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1980 mutex_unlock(&fe->card->mutex); 1981 1982 if (ret < 0) 1983 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, ret); 1984 1985 return ret; 1986 } 1987 1988 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 1989 int cmd) 1990 { 1991 struct snd_soc_pcm_runtime *be; 1992 struct snd_soc_dpcm *dpcm; 1993 int ret = 0; 1994 1995 for_each_dpcm_be(fe, stream, dpcm) { 1996 struct snd_pcm_substream *be_substream; 1997 1998 be = dpcm->be; 1999 be_substream = snd_soc_dpcm_get_substream(be, stream); 2000 2001 /* is this op for this BE ? */ 2002 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2003 continue; 2004 2005 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2006 be->dai_link->name, cmd); 2007 2008 switch (cmd) { 2009 case SNDRV_PCM_TRIGGER_START: 2010 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2011 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2012 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2013 continue; 2014 2015 ret = soc_pcm_trigger(be_substream, cmd); 2016 if (ret) 2017 goto end; 2018 2019 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2020 break; 2021 case SNDRV_PCM_TRIGGER_RESUME: 2022 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2023 continue; 2024 2025 ret = soc_pcm_trigger(be_substream, cmd); 2026 if (ret) 2027 goto end; 2028 2029 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2030 break; 2031 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2032 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2033 continue; 2034 2035 ret = soc_pcm_trigger(be_substream, cmd); 2036 if (ret) 2037 goto end; 2038 2039 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2040 break; 2041 case SNDRV_PCM_TRIGGER_STOP: 2042 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2044 continue; 2045 2046 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2047 continue; 2048 2049 ret = soc_pcm_trigger(be_substream, cmd); 2050 if (ret) 2051 goto end; 2052 2053 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2054 break; 2055 case SNDRV_PCM_TRIGGER_SUSPEND: 2056 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2057 continue; 2058 2059 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2060 continue; 2061 2062 ret = soc_pcm_trigger(be_substream, cmd); 2063 if (ret) 2064 goto end; 2065 2066 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2067 break; 2068 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2069 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2070 continue; 2071 2072 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2073 continue; 2074 2075 ret = soc_pcm_trigger(be_substream, cmd); 2076 if (ret) 2077 goto end; 2078 2079 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2080 break; 2081 } 2082 } 2083 end: 2084 if (ret < 0) 2085 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2086 __func__, be->dai_link->name, ret); 2087 return ret; 2088 } 2089 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2090 2091 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2092 int cmd, bool fe_first) 2093 { 2094 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2095 int ret; 2096 2097 /* call trigger on the frontend before the backend. */ 2098 if (fe_first) { 2099 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2100 fe->dai_link->name, cmd); 2101 2102 ret = soc_pcm_trigger(substream, cmd); 2103 if (ret < 0) 2104 return ret; 2105 2106 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2107 return ret; 2108 } 2109 2110 /* call trigger on the frontend after the backend. */ 2111 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2112 if (ret < 0) 2113 return ret; 2114 2115 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2116 fe->dai_link->name, cmd); 2117 2118 ret = soc_pcm_trigger(substream, cmd); 2119 2120 return ret; 2121 } 2122 2123 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2124 { 2125 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2126 int stream = substream->stream; 2127 int ret = 0; 2128 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2129 2130 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2131 2132 switch (trigger) { 2133 case SND_SOC_DPCM_TRIGGER_PRE: 2134 switch (cmd) { 2135 case SNDRV_PCM_TRIGGER_START: 2136 case SNDRV_PCM_TRIGGER_RESUME: 2137 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2138 case SNDRV_PCM_TRIGGER_DRAIN: 2139 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2140 break; 2141 case SNDRV_PCM_TRIGGER_STOP: 2142 case SNDRV_PCM_TRIGGER_SUSPEND: 2143 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2144 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2145 break; 2146 default: 2147 ret = -EINVAL; 2148 break; 2149 } 2150 break; 2151 case SND_SOC_DPCM_TRIGGER_POST: 2152 switch (cmd) { 2153 case SNDRV_PCM_TRIGGER_START: 2154 case SNDRV_PCM_TRIGGER_RESUME: 2155 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2156 case SNDRV_PCM_TRIGGER_DRAIN: 2157 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2158 break; 2159 case SNDRV_PCM_TRIGGER_STOP: 2160 case SNDRV_PCM_TRIGGER_SUSPEND: 2161 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2162 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2163 break; 2164 default: 2165 ret = -EINVAL; 2166 break; 2167 } 2168 break; 2169 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2170 /* bespoke trigger() - handles both FE and BEs */ 2171 2172 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2173 fe->dai_link->name, cmd); 2174 2175 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2176 break; 2177 default: 2178 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2179 fe->dai_link->name); 2180 ret = -EINVAL; 2181 goto out; 2182 } 2183 2184 if (ret < 0) { 2185 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2186 cmd, ret); 2187 goto out; 2188 } 2189 2190 switch (cmd) { 2191 case SNDRV_PCM_TRIGGER_START: 2192 case SNDRV_PCM_TRIGGER_RESUME: 2193 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2194 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2195 break; 2196 case SNDRV_PCM_TRIGGER_STOP: 2197 case SNDRV_PCM_TRIGGER_SUSPEND: 2198 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2199 break; 2200 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2201 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2202 break; 2203 } 2204 2205 out: 2206 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2207 return ret; 2208 } 2209 2210 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2211 { 2212 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2213 int stream = substream->stream; 2214 2215 /* if FE's runtime_update is already set, we're in race; 2216 * process this trigger later at exit 2217 */ 2218 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2219 fe->dpcm[stream].trigger_pending = cmd + 1; 2220 return 0; /* delayed, assuming it's successful */ 2221 } 2222 2223 /* we're alone, let's trigger */ 2224 return dpcm_fe_dai_do_trigger(substream, cmd); 2225 } 2226 2227 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2228 { 2229 struct snd_soc_dpcm *dpcm; 2230 int ret = 0; 2231 2232 for_each_dpcm_be(fe, stream, dpcm) { 2233 2234 struct snd_soc_pcm_runtime *be = dpcm->be; 2235 struct snd_pcm_substream *be_substream = 2236 snd_soc_dpcm_get_substream(be, stream); 2237 2238 /* is this op for this BE ? */ 2239 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2240 continue; 2241 2242 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2243 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2244 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2245 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2246 continue; 2247 2248 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2249 be->dai_link->name); 2250 2251 ret = soc_pcm_prepare(be_substream); 2252 if (ret < 0) 2253 break; 2254 2255 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2256 } 2257 2258 if (ret < 0) 2259 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2260 2261 return ret; 2262 } 2263 2264 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2265 { 2266 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2267 int stream = substream->stream, ret = 0; 2268 2269 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2270 2271 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2272 2273 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2274 2275 /* there is no point preparing this FE if there are no BEs */ 2276 if (list_empty(&fe->dpcm[stream].be_clients)) { 2277 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2278 fe->dai_link->name); 2279 ret = -EINVAL; 2280 goto out; 2281 } 2282 2283 ret = dpcm_be_dai_prepare(fe, stream); 2284 if (ret < 0) 2285 goto out; 2286 2287 /* call prepare on the frontend */ 2288 ret = soc_pcm_prepare(substream); 2289 if (ret < 0) 2290 goto out; 2291 2292 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2293 2294 out: 2295 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2296 mutex_unlock(&fe->card->mutex); 2297 2298 if (ret < 0) 2299 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2300 2301 return ret; 2302 } 2303 2304 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2305 { 2306 struct snd_pcm_substream *substream = 2307 snd_soc_dpcm_get_substream(fe, stream); 2308 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2309 int err; 2310 2311 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2312 stream ? "capture" : "playback", fe->dai_link->name); 2313 2314 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2315 /* call bespoke trigger - FE takes care of all BE triggers */ 2316 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2317 fe->dai_link->name); 2318 2319 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2320 } else { 2321 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2322 fe->dai_link->name); 2323 2324 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2325 } 2326 2327 dpcm_be_dai_hw_free(fe, stream); 2328 2329 dpcm_be_dai_shutdown(fe, stream); 2330 2331 /* run the stream event for each BE */ 2332 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2333 2334 if (err < 0) 2335 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, err); 2336 2337 return err; 2338 } 2339 2340 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2341 { 2342 struct snd_pcm_substream *substream = 2343 snd_soc_dpcm_get_substream(fe, stream); 2344 struct snd_soc_dpcm *dpcm; 2345 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2346 int ret = 0; 2347 unsigned long flags; 2348 2349 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2350 stream ? "capture" : "playback", fe->dai_link->name); 2351 2352 /* Only start the BE if the FE is ready */ 2353 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2354 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2355 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2356 fe->dai_link->name, fe->dpcm[stream].state); 2357 ret = -EINVAL; 2358 goto disconnect; 2359 } 2360 2361 /* startup must always be called for new BEs */ 2362 ret = dpcm_be_dai_startup(fe, stream); 2363 if (ret < 0) 2364 goto disconnect; 2365 2366 /* keep going if FE state is > open */ 2367 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2368 return 0; 2369 2370 ret = dpcm_be_dai_hw_params(fe, stream); 2371 if (ret < 0) 2372 goto close; 2373 2374 /* keep going if FE state is > hw_params */ 2375 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2376 return 0; 2377 2378 ret = dpcm_be_dai_prepare(fe, stream); 2379 if (ret < 0) 2380 goto hw_free; 2381 2382 /* run the stream event for each BE */ 2383 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2384 2385 /* keep going if FE state is > prepare */ 2386 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2387 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2388 return 0; 2389 2390 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2391 /* call trigger on the frontend - FE takes care of all BE triggers */ 2392 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2393 fe->dai_link->name); 2394 2395 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2396 if (ret < 0) 2397 goto hw_free; 2398 } else { 2399 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2400 fe->dai_link->name); 2401 2402 ret = dpcm_be_dai_trigger(fe, stream, 2403 SNDRV_PCM_TRIGGER_START); 2404 if (ret < 0) 2405 goto hw_free; 2406 } 2407 2408 return 0; 2409 2410 hw_free: 2411 dpcm_be_dai_hw_free(fe, stream); 2412 close: 2413 dpcm_be_dai_shutdown(fe, stream); 2414 disconnect: 2415 /* disconnect any pending BEs */ 2416 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2417 for_each_dpcm_be(fe, stream, dpcm) { 2418 struct snd_soc_pcm_runtime *be = dpcm->be; 2419 2420 /* is this op for this BE ? */ 2421 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2422 continue; 2423 2424 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2425 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2426 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2427 } 2428 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2429 2430 if (ret < 0) 2431 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2432 2433 return ret; 2434 } 2435 2436 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2437 { 2438 struct snd_soc_dapm_widget_list *list; 2439 int stream; 2440 int count, paths; 2441 2442 if (!fe->dai_link->dynamic) 2443 return 0; 2444 2445 if (fe->num_cpus > 1) { 2446 dev_err(fe->dev, 2447 "%s doesn't support Multi CPU yet\n", __func__); 2448 return -EINVAL; 2449 } 2450 2451 /* only check active links */ 2452 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2453 return 0; 2454 2455 /* DAPM sync will call this to update DSP paths */ 2456 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2457 new ? "new" : "old", fe->dai_link->name); 2458 2459 for_each_pcm_streams(stream) { 2460 2461 /* skip if FE doesn't have playback/capture capability */ 2462 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2463 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2464 continue; 2465 2466 /* skip if FE isn't currently playing/capturing */ 2467 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2468 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2469 continue; 2470 2471 paths = dpcm_path_get(fe, stream, &list); 2472 if (paths < 0) 2473 return paths; 2474 2475 /* update any playback/capture paths */ 2476 count = dpcm_process_paths(fe, stream, &list, new); 2477 if (count) { 2478 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2479 if (new) 2480 dpcm_run_update_startup(fe, stream); 2481 else 2482 dpcm_run_update_shutdown(fe, stream); 2483 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2484 2485 dpcm_clear_pending_state(fe, stream); 2486 dpcm_be_disconnect(fe, stream); 2487 } 2488 2489 dpcm_path_put(&list); 2490 } 2491 2492 return 0; 2493 } 2494 2495 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2496 * any DAI links. 2497 */ 2498 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2499 { 2500 struct snd_soc_pcm_runtime *fe; 2501 int ret = 0; 2502 2503 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2504 /* shutdown all old paths first */ 2505 for_each_card_rtds(card, fe) { 2506 ret = soc_dpcm_fe_runtime_update(fe, 0); 2507 if (ret) 2508 goto out; 2509 } 2510 2511 /* bring new paths up */ 2512 for_each_card_rtds(card, fe) { 2513 ret = soc_dpcm_fe_runtime_update(fe, 1); 2514 if (ret) 2515 goto out; 2516 } 2517 2518 out: 2519 mutex_unlock(&card->mutex); 2520 return ret; 2521 } 2522 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2523 2524 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2525 { 2526 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2527 struct snd_soc_dpcm *dpcm; 2528 int stream = fe_substream->stream; 2529 2530 /* mark FE's links ready to prune */ 2531 for_each_dpcm_be(fe, stream, dpcm) 2532 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2533 2534 dpcm_be_disconnect(fe, stream); 2535 2536 fe->dpcm[stream].runtime = NULL; 2537 } 2538 2539 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2540 { 2541 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2542 int ret; 2543 2544 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2545 ret = dpcm_fe_dai_shutdown(fe_substream); 2546 2547 dpcm_fe_dai_cleanup(fe_substream); 2548 2549 mutex_unlock(&fe->card->mutex); 2550 return ret; 2551 } 2552 2553 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2554 { 2555 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2556 struct snd_soc_dapm_widget_list *list; 2557 int ret; 2558 int stream = fe_substream->stream; 2559 2560 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2561 fe->dpcm[stream].runtime = fe_substream->runtime; 2562 2563 ret = dpcm_path_get(fe, stream, &list); 2564 if (ret < 0) 2565 goto open_end; 2566 2567 /* calculate valid and active FE <-> BE dpcms */ 2568 dpcm_process_paths(fe, stream, &list, 1); 2569 2570 ret = dpcm_fe_dai_startup(fe_substream); 2571 if (ret < 0) 2572 dpcm_fe_dai_cleanup(fe_substream); 2573 2574 dpcm_clear_pending_state(fe, stream); 2575 dpcm_path_put(&list); 2576 open_end: 2577 mutex_unlock(&fe->card->mutex); 2578 return ret; 2579 } 2580 2581 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2582 int *playback, int *capture) 2583 { 2584 struct snd_soc_dai *codec_dai; 2585 struct snd_soc_dai *cpu_dai; 2586 int stream; 2587 int i; 2588 2589 if (rtd->dai_link->dynamic && rtd->num_cpus > 1) { 2590 dev_err(rtd->dev, 2591 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2592 return -EINVAL; 2593 } 2594 2595 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2596 if (rtd->dai_link->dpcm_playback) { 2597 stream = SNDRV_PCM_STREAM_PLAYBACK; 2598 2599 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2600 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2601 *playback = 1; 2602 break; 2603 } 2604 } 2605 if (!*playback) { 2606 dev_err(rtd->card->dev, 2607 "No CPU DAIs support playback for stream %s\n", 2608 rtd->dai_link->stream_name); 2609 return -EINVAL; 2610 } 2611 } 2612 if (rtd->dai_link->dpcm_capture) { 2613 stream = SNDRV_PCM_STREAM_CAPTURE; 2614 2615 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2616 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2617 *capture = 1; 2618 break; 2619 } 2620 } 2621 2622 if (!*capture) { 2623 dev_err(rtd->card->dev, 2624 "No CPU DAIs support capture for stream %s\n", 2625 rtd->dai_link->stream_name); 2626 return -EINVAL; 2627 } 2628 } 2629 } else { 2630 /* Adapt stream for codec2codec links */ 2631 int cpu_capture = rtd->dai_link->params ? 2632 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2633 int cpu_playback = rtd->dai_link->params ? 2634 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2635 2636 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2637 if (rtd->num_cpus == 1) { 2638 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2639 } else if (rtd->num_cpus == rtd->num_codecs) { 2640 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2641 } else { 2642 dev_err(rtd->card->dev, 2643 "N cpus to M codecs link is not supported yet\n"); 2644 return -EINVAL; 2645 } 2646 2647 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2648 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2649 *playback = 1; 2650 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2651 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2652 *capture = 1; 2653 } 2654 } 2655 2656 if (rtd->dai_link->playback_only) { 2657 *playback = 1; 2658 *capture = 0; 2659 } 2660 2661 if (rtd->dai_link->capture_only) { 2662 *playback = 0; 2663 *capture = 1; 2664 } 2665 2666 return 0; 2667 } 2668 2669 static int soc_create_pcm(struct snd_pcm **pcm, 2670 struct snd_soc_pcm_runtime *rtd, 2671 int playback, int capture, int num) 2672 { 2673 char new_name[64]; 2674 int ret; 2675 2676 /* create the PCM */ 2677 if (rtd->dai_link->params) { 2678 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2679 rtd->dai_link->stream_name); 2680 2681 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2682 playback, capture, pcm); 2683 } else if (rtd->dai_link->no_pcm) { 2684 snprintf(new_name, sizeof(new_name), "(%s)", 2685 rtd->dai_link->stream_name); 2686 2687 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2688 playback, capture, pcm); 2689 } else { 2690 if (rtd->dai_link->dynamic) 2691 snprintf(new_name, sizeof(new_name), "%s (*)", 2692 rtd->dai_link->stream_name); 2693 else 2694 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2695 rtd->dai_link->stream_name, 2696 soc_codec_dai_name(rtd), num); 2697 2698 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2699 capture, pcm); 2700 } 2701 if (ret < 0) { 2702 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2703 new_name, rtd->dai_link->name, ret); 2704 return ret; 2705 } 2706 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2707 2708 return 0; 2709 } 2710 2711 /* create a new pcm */ 2712 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2713 { 2714 struct snd_soc_component *component; 2715 struct snd_pcm *pcm; 2716 int ret = 0, playback = 0, capture = 0; 2717 int i; 2718 2719 ret = soc_get_playback_capture(rtd, &playback, &capture); 2720 if (ret < 0) 2721 return ret; 2722 2723 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2724 if (ret < 0) 2725 return ret; 2726 2727 /* DAPM dai link stream work */ 2728 if (rtd->dai_link->params) 2729 rtd->close_delayed_work_func = codec2codec_close_delayed_work; 2730 else 2731 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2732 2733 rtd->pcm = pcm; 2734 pcm->nonatomic = rtd->dai_link->nonatomic; 2735 pcm->private_data = rtd; 2736 2737 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2738 if (playback) 2739 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2740 if (capture) 2741 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2742 goto out; 2743 } 2744 2745 /* ASoC PCM operations */ 2746 if (rtd->dai_link->dynamic) { 2747 rtd->ops.open = dpcm_fe_dai_open; 2748 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2749 rtd->ops.prepare = dpcm_fe_dai_prepare; 2750 rtd->ops.trigger = dpcm_fe_dai_trigger; 2751 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2752 rtd->ops.close = dpcm_fe_dai_close; 2753 rtd->ops.pointer = soc_pcm_pointer; 2754 } else { 2755 rtd->ops.open = soc_pcm_open; 2756 rtd->ops.hw_params = soc_pcm_hw_params; 2757 rtd->ops.prepare = soc_pcm_prepare; 2758 rtd->ops.trigger = soc_pcm_trigger; 2759 rtd->ops.hw_free = soc_pcm_hw_free; 2760 rtd->ops.close = soc_pcm_close; 2761 rtd->ops.pointer = soc_pcm_pointer; 2762 } 2763 2764 for_each_rtd_components(rtd, i, component) { 2765 const struct snd_soc_component_driver *drv = component->driver; 2766 2767 if (drv->ioctl) 2768 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2769 if (drv->sync_stop) 2770 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2771 if (drv->copy_user) 2772 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2773 if (drv->page) 2774 rtd->ops.page = snd_soc_pcm_component_page; 2775 if (drv->mmap) 2776 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2777 if (drv->ack) 2778 rtd->ops.ack = snd_soc_pcm_component_ack; 2779 } 2780 2781 if (playback) 2782 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2783 2784 if (capture) 2785 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2786 2787 ret = snd_soc_pcm_component_new(rtd); 2788 if (ret < 0) 2789 return ret; 2790 2791 pcm->no_device_suspend = true; 2792 out: 2793 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2794 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2795 return ret; 2796 } 2797 2798 /* is the current PCM operation for this FE ? */ 2799 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2800 { 2801 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2802 return 1; 2803 return 0; 2804 } 2805 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2806 2807 /* is the current PCM operation for this BE ? */ 2808 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2809 struct snd_soc_pcm_runtime *be, int stream) 2810 { 2811 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2812 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2813 be->dpcm[stream].runtime_update)) 2814 return 1; 2815 return 0; 2816 } 2817 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2818 2819 /* get the substream for this BE */ 2820 struct snd_pcm_substream * 2821 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2822 { 2823 return be->pcm->streams[stream].substream; 2824 } 2825 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2826 2827 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 2828 struct snd_soc_pcm_runtime *be, 2829 int stream, 2830 const enum snd_soc_dpcm_state *states, 2831 int num_states) 2832 { 2833 struct snd_soc_dpcm *dpcm; 2834 int state; 2835 int ret = 1; 2836 unsigned long flags; 2837 int i; 2838 2839 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2840 for_each_dpcm_fe(be, stream, dpcm) { 2841 2842 if (dpcm->fe == fe) 2843 continue; 2844 2845 state = dpcm->fe->dpcm[stream].state; 2846 for (i = 0; i < num_states; i++) { 2847 if (state == states[i]) { 2848 ret = 0; 2849 break; 2850 } 2851 } 2852 } 2853 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2854 2855 /* it's safe to do this BE DAI */ 2856 return ret; 2857 } 2858 2859 /* 2860 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2861 * are not running, paused or suspended for the specified stream direction. 2862 */ 2863 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2864 struct snd_soc_pcm_runtime *be, int stream) 2865 { 2866 const enum snd_soc_dpcm_state state[] = { 2867 SND_SOC_DPCM_STATE_START, 2868 SND_SOC_DPCM_STATE_PAUSED, 2869 SND_SOC_DPCM_STATE_SUSPEND, 2870 }; 2871 2872 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 2873 } 2874 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 2875 2876 /* 2877 * We can only change hw params a BE DAI if any of it's FE are not prepared, 2878 * running, paused or suspended for the specified stream direction. 2879 */ 2880 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 2881 struct snd_soc_pcm_runtime *be, int stream) 2882 { 2883 const enum snd_soc_dpcm_state state[] = { 2884 SND_SOC_DPCM_STATE_START, 2885 SND_SOC_DPCM_STATE_PAUSED, 2886 SND_SOC_DPCM_STATE_SUSPEND, 2887 SND_SOC_DPCM_STATE_PREPARE, 2888 }; 2889 2890 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 2891 } 2892 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 2893