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 soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret) 31 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd, 32 const char *func, int ret) 33 { 34 /* Positive, Zero values are not errors */ 35 if (ret >= 0) 36 return ret; 37 38 /* Negative values might be errors */ 39 switch (ret) { 40 case -EPROBE_DEFER: 41 case -ENOTSUPP: 42 break; 43 default: 44 dev_err(rtd->dev, 45 "ASoC: error at %s on %s: %d\n", 46 func, rtd->dai_link->name, ret); 47 } 48 49 return ret; 50 } 51 52 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd, 53 int stream) 54 { 55 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 56 } 57 58 #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \ 59 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags) 60 61 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd, 62 int stream) 63 { 64 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 65 } 66 67 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \ 68 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags) 69 70 #define DPCM_MAX_BE_USERS 8 71 72 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 73 { 74 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 75 } 76 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 77 { 78 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 79 } 80 81 #ifdef CONFIG_DEBUG_FS 82 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 83 { 84 switch (state) { 85 case SND_SOC_DPCM_STATE_NEW: 86 return "new"; 87 case SND_SOC_DPCM_STATE_OPEN: 88 return "open"; 89 case SND_SOC_DPCM_STATE_HW_PARAMS: 90 return "hw_params"; 91 case SND_SOC_DPCM_STATE_PREPARE: 92 return "prepare"; 93 case SND_SOC_DPCM_STATE_START: 94 return "start"; 95 case SND_SOC_DPCM_STATE_STOP: 96 return "stop"; 97 case SND_SOC_DPCM_STATE_SUSPEND: 98 return "suspend"; 99 case SND_SOC_DPCM_STATE_PAUSED: 100 return "paused"; 101 case SND_SOC_DPCM_STATE_HW_FREE: 102 return "hw_free"; 103 case SND_SOC_DPCM_STATE_CLOSE: 104 return "close"; 105 } 106 107 return "unknown"; 108 } 109 110 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 111 int stream, char *buf, size_t size) 112 { 113 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 114 struct snd_soc_dpcm *dpcm; 115 ssize_t offset = 0; 116 117 /* FE state */ 118 offset += scnprintf(buf + offset, size - offset, 119 "[%s - %s]\n", fe->dai_link->name, 120 stream ? "Capture" : "Playback"); 121 122 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 123 dpcm_state_string(fe->dpcm[stream].state)); 124 125 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 126 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 127 offset += scnprintf(buf + offset, size - offset, 128 "Hardware Params: " 129 "Format = %s, Channels = %d, Rate = %d\n", 130 snd_pcm_format_name(params_format(params)), 131 params_channels(params), 132 params_rate(params)); 133 134 /* BEs state */ 135 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 136 137 if (list_empty(&fe->dpcm[stream].be_clients)) { 138 offset += scnprintf(buf + offset, size - offset, 139 " No active DSP links\n"); 140 goto out; 141 } 142 143 for_each_dpcm_be(fe, stream, dpcm) { 144 struct snd_soc_pcm_runtime *be = dpcm->be; 145 params = &be->dpcm[stream].hw_params; 146 147 offset += scnprintf(buf + offset, size - offset, 148 "- %s\n", be->dai_link->name); 149 150 offset += scnprintf(buf + offset, size - offset, 151 " State: %s\n", 152 dpcm_state_string(be->dpcm[stream].state)); 153 154 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 155 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 156 offset += scnprintf(buf + offset, size - offset, 157 " Hardware Params: " 158 "Format = %s, Channels = %d, Rate = %d\n", 159 snd_pcm_format_name(params_format(params)), 160 params_channels(params), 161 params_rate(params)); 162 } 163 out: 164 return offset; 165 } 166 167 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 168 size_t count, loff_t *ppos) 169 { 170 struct snd_soc_pcm_runtime *fe = file->private_data; 171 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 172 int stream; 173 char *buf; 174 175 if (fe->dai_link->num_cpus > 1) { 176 dev_err(fe->dev, 177 "%s doesn't support Multi CPU yet\n", __func__); 178 return -EINVAL; 179 } 180 181 buf = kmalloc(out_count, GFP_KERNEL); 182 if (!buf) 183 return -ENOMEM; 184 185 snd_soc_dpcm_mutex_lock(fe); 186 for_each_pcm_streams(stream) 187 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 188 offset += dpcm_show_state(fe, stream, 189 buf + offset, 190 out_count - offset); 191 snd_soc_dpcm_mutex_unlock(fe); 192 193 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 194 195 kfree(buf); 196 return ret; 197 } 198 199 static const struct file_operations dpcm_state_fops = { 200 .open = simple_open, 201 .read = dpcm_state_read_file, 202 .llseek = default_llseek, 203 }; 204 205 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 206 { 207 if (!rtd->dai_link->dynamic) 208 return; 209 210 if (!rtd->card->debugfs_card_root) 211 return; 212 213 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 214 rtd->card->debugfs_card_root); 215 216 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 217 rtd, &dpcm_state_fops); 218 } 219 220 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 221 { 222 char *name; 223 224 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 225 stream ? "capture" : "playback"); 226 if (name) { 227 dpcm->debugfs_state = debugfs_create_dir( 228 name, dpcm->fe->debugfs_dpcm_root); 229 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 230 &dpcm->state); 231 kfree(name); 232 } 233 } 234 235 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 236 { 237 debugfs_remove_recursive(dpcm->debugfs_state); 238 } 239 240 #else 241 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 242 int stream) 243 { 244 } 245 246 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 247 { 248 } 249 #endif 250 251 /* Set FE's runtime_update state; the state is protected via PCM stream lock 252 * for avoiding the race with trigger callback. 253 * If the state is unset and a trigger is pending while the previous operation, 254 * process the pending trigger action here. 255 */ 256 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 257 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 258 int stream, enum snd_soc_dpcm_update state) 259 { 260 struct snd_pcm_substream *substream = 261 snd_soc_dpcm_get_substream(fe, stream); 262 263 snd_soc_dpcm_stream_lock_irq(fe, stream); 264 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 265 dpcm_fe_dai_do_trigger(substream, 266 fe->dpcm[stream].trigger_pending - 1); 267 fe->dpcm[stream].trigger_pending = 0; 268 } 269 fe->dpcm[stream].runtime_update = state; 270 snd_soc_dpcm_stream_unlock_irq(fe, stream); 271 } 272 273 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 274 int stream, enum snd_soc_dpcm_update state) 275 { 276 be->dpcm[stream].runtime_update = state; 277 } 278 279 /** 280 * snd_soc_runtime_action() - Increment/Decrement active count for 281 * PCM runtime components 282 * @rtd: ASoC PCM runtime that is activated 283 * @stream: Direction of the PCM stream 284 * @action: Activate stream if 1. Deactivate if -1. 285 * 286 * Increments/Decrements the active count for all the DAIs and components 287 * attached to a PCM runtime. 288 * Should typically be called when a stream is opened. 289 * 290 * Must be called with the rtd->card->pcm_mutex being held 291 */ 292 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 293 int stream, int action) 294 { 295 struct snd_soc_dai *dai; 296 int i; 297 298 snd_soc_dpcm_mutex_assert_held(rtd); 299 300 for_each_rtd_dais(rtd, i, dai) 301 snd_soc_dai_action(dai, stream, action); 302 } 303 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 304 305 /** 306 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 307 * @rtd: The ASoC PCM runtime that should be checked. 308 * 309 * This function checks whether the power down delay should be ignored for a 310 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 311 * been configured to ignore the delay, or if none of the components benefits 312 * from having the delay. 313 */ 314 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 315 { 316 struct snd_soc_component *component; 317 bool ignore = true; 318 int i; 319 320 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 321 return true; 322 323 for_each_rtd_components(rtd, i, component) 324 ignore &= !component->driver->use_pmdown_time; 325 326 return ignore; 327 } 328 329 /** 330 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 331 * @substream: the pcm substream 332 * @hw: the hardware parameters 333 * 334 * Sets the substream runtime hardware parameters. 335 */ 336 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 337 const struct snd_pcm_hardware *hw) 338 { 339 substream->runtime->hw = *hw; 340 341 return 0; 342 } 343 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 344 345 /* DPCM stream event, send event to FE and all active BEs. */ 346 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 347 int event) 348 { 349 struct snd_soc_dpcm *dpcm; 350 351 snd_soc_dpcm_mutex_assert_held(fe); 352 353 for_each_dpcm_be(fe, dir, dpcm) { 354 355 struct snd_soc_pcm_runtime *be = dpcm->be; 356 357 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 358 be->dai_link->name, event, dir); 359 360 if ((event == SND_SOC_DAPM_STREAM_STOP) && 361 (be->dpcm[dir].users >= 1)) 362 continue; 363 364 snd_soc_dapm_stream_event(be, dir, event); 365 } 366 367 snd_soc_dapm_stream_event(fe, dir, event); 368 369 return 0; 370 } 371 372 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 373 struct snd_pcm_hw_params *params) 374 { 375 if (params) { 376 dai->rate = params_rate(params); 377 dai->channels = params_channels(params); 378 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 379 } else { 380 dai->rate = 0; 381 dai->channels = 0; 382 dai->sample_bits = 0; 383 } 384 } 385 386 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 387 struct snd_soc_dai *soc_dai) 388 { 389 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 390 int ret; 391 392 if (!snd_soc_dai_active(soc_dai)) 393 return 0; 394 395 #define __soc_pcm_apply_symmetry(name, NAME) \ 396 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 397 rtd->dai_link->symmetric_##name)) { \ 398 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 399 #name, soc_dai->name); \ 400 \ 401 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 402 SNDRV_PCM_HW_PARAM_##NAME,\ 403 soc_dai->name); \ 404 if (ret < 0) { \ 405 dev_err(soc_dai->dev, \ 406 "ASoC: Unable to apply %s constraint: %d\n",\ 407 #name, ret); \ 408 return ret; \ 409 } \ 410 } 411 412 __soc_pcm_apply_symmetry(rate, RATE); 413 __soc_pcm_apply_symmetry(channels, CHANNELS); 414 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 415 416 return 0; 417 } 418 419 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 420 struct snd_pcm_hw_params *params) 421 { 422 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 423 struct snd_soc_dai d; 424 struct snd_soc_dai *dai; 425 struct snd_soc_dai *cpu_dai; 426 unsigned int symmetry, i; 427 428 d.name = __func__; 429 soc_pcm_set_dai_params(&d, params); 430 431 #define __soc_pcm_params_symmetry(xxx) \ 432 symmetry = rtd->dai_link->symmetric_##xxx; \ 433 for_each_rtd_dais(rtd, i, dai) \ 434 symmetry |= dai->driver->symmetric_##xxx; \ 435 \ 436 if (symmetry) \ 437 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 438 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 439 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 440 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 441 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 442 return -EINVAL; \ 443 } 444 445 /* reject unmatched parameters when applying symmetry */ 446 __soc_pcm_params_symmetry(rate); 447 __soc_pcm_params_symmetry(channels); 448 __soc_pcm_params_symmetry(sample_bits); 449 450 return 0; 451 } 452 453 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 454 { 455 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 456 struct snd_soc_dai_link *link = rtd->dai_link; 457 struct snd_soc_dai *dai; 458 unsigned int symmetry, i; 459 460 symmetry = link->symmetric_rate || 461 link->symmetric_channels || 462 link->symmetric_sample_bits; 463 464 for_each_rtd_dais(rtd, i, dai) 465 symmetry = symmetry || 466 dai->driver->symmetric_rate || 467 dai->driver->symmetric_channels || 468 dai->driver->symmetric_sample_bits; 469 470 if (symmetry) 471 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 472 } 473 474 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 475 { 476 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 477 int ret; 478 479 if (!bits) 480 return; 481 482 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 483 if (ret != 0) 484 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 485 bits, ret); 486 } 487 488 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 489 { 490 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 491 struct snd_soc_dai *cpu_dai; 492 struct snd_soc_dai *codec_dai; 493 int stream = substream->stream; 494 int i; 495 unsigned int bits = 0, cpu_bits = 0; 496 497 for_each_rtd_codec_dais(rtd, i, codec_dai) { 498 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 499 500 if (pcm_codec->sig_bits == 0) { 501 bits = 0; 502 break; 503 } 504 bits = max(pcm_codec->sig_bits, bits); 505 } 506 507 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 508 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 509 510 if (pcm_cpu->sig_bits == 0) { 511 cpu_bits = 0; 512 break; 513 } 514 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 515 } 516 517 soc_pcm_set_msb(substream, bits); 518 soc_pcm_set_msb(substream, cpu_bits); 519 } 520 521 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 522 { 523 hw->rates = UINT_MAX; 524 hw->rate_min = 0; 525 hw->rate_max = UINT_MAX; 526 hw->channels_min = 0; 527 hw->channels_max = UINT_MAX; 528 hw->formats = ULLONG_MAX; 529 } 530 531 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 532 struct snd_soc_pcm_stream *p) 533 { 534 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 535 536 /* setup hw->rate_min/max via hw->rates first */ 537 snd_pcm_hw_limit_rates(hw); 538 539 /* update hw->rate_min/max by snd_soc_pcm_stream */ 540 hw->rate_min = max(hw->rate_min, p->rate_min); 541 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 542 } 543 544 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 545 struct snd_soc_pcm_stream *p) 546 { 547 hw->channels_min = max(hw->channels_min, p->channels_min); 548 hw->channels_max = min(hw->channels_max, p->channels_max); 549 } 550 551 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 552 struct snd_soc_pcm_stream *p) 553 { 554 hw->formats &= p->formats; 555 } 556 557 /** 558 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 559 * @rtd: ASoC PCM runtime 560 * @hw: PCM hardware parameters (output) 561 * @stream: Direction of the PCM stream 562 * 563 * Calculates the subset of stream parameters supported by all DAIs 564 * associated with the PCM stream. 565 */ 566 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 567 struct snd_pcm_hardware *hw, int stream) 568 { 569 struct snd_soc_dai *codec_dai; 570 struct snd_soc_dai *cpu_dai; 571 struct snd_soc_pcm_stream *codec_stream; 572 struct snd_soc_pcm_stream *cpu_stream; 573 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 574 int i; 575 576 soc_pcm_hw_init(hw); 577 578 /* first calculate min/max only for CPUs in the DAI link */ 579 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 580 581 /* 582 * Skip CPUs which don't support the current stream type. 583 * Otherwise, since the rate, channel, and format values will 584 * zero in that case, we would have no usable settings left, 585 * causing the resulting setup to fail. 586 */ 587 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 588 continue; 589 590 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 591 592 soc_pcm_hw_update_chan(hw, cpu_stream); 593 soc_pcm_hw_update_rate(hw, cpu_stream); 594 soc_pcm_hw_update_format(hw, cpu_stream); 595 } 596 cpu_chan_min = hw->channels_min; 597 cpu_chan_max = hw->channels_max; 598 599 /* second calculate min/max only for CODECs in the DAI link */ 600 for_each_rtd_codec_dais(rtd, i, codec_dai) { 601 602 /* 603 * Skip CODECs which don't support the current stream type. 604 * Otherwise, since the rate, channel, and format values will 605 * zero in that case, we would have no usable settings left, 606 * causing the resulting setup to fail. 607 */ 608 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 609 continue; 610 611 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 612 613 soc_pcm_hw_update_chan(hw, codec_stream); 614 soc_pcm_hw_update_rate(hw, codec_stream); 615 soc_pcm_hw_update_format(hw, codec_stream); 616 } 617 618 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 619 if (!hw->channels_min) 620 return -EINVAL; 621 622 /* 623 * chan min/max cannot be enforced if there are multiple CODEC DAIs 624 * connected to CPU DAI(s), use CPU DAI's directly and let 625 * channel allocation be fixed up later 626 */ 627 if (rtd->dai_link->num_codecs > 1) { 628 hw->channels_min = cpu_chan_min; 629 hw->channels_max = cpu_chan_max; 630 } 631 632 return 0; 633 } 634 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 635 636 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 637 { 638 struct snd_pcm_hardware *hw = &substream->runtime->hw; 639 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 640 u64 formats = hw->formats; 641 642 /* 643 * At least one CPU and one CODEC should match. Otherwise, we should 644 * have bailed out on a higher level, since there would be no CPU or 645 * CODEC to support the transfer direction in that case. 646 */ 647 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 648 649 if (formats) 650 hw->formats &= formats; 651 } 652 653 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 654 { 655 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 656 struct snd_soc_component *component; 657 int i, ret = 0; 658 659 for_each_rtd_components(rtd, i, component) { 660 ret = snd_soc_component_module_get_when_open(component, substream); 661 if (ret < 0) 662 break; 663 664 ret = snd_soc_component_open(component, substream); 665 if (ret < 0) 666 break; 667 } 668 669 return ret; 670 } 671 672 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 673 int rollback) 674 { 675 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 676 struct snd_soc_component *component; 677 int i, ret = 0; 678 679 for_each_rtd_components(rtd, i, component) { 680 int r = snd_soc_component_close(component, substream, rollback); 681 if (r < 0) 682 ret = r; /* use last ret */ 683 684 snd_soc_component_module_put_when_close(component, substream, rollback); 685 } 686 687 return ret; 688 } 689 690 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 691 struct snd_pcm_substream *substream, int rollback) 692 { 693 struct snd_soc_component *component; 694 struct snd_soc_dai *dai; 695 int i; 696 697 snd_soc_dpcm_mutex_assert_held(rtd); 698 699 if (!rollback) { 700 snd_soc_runtime_deactivate(rtd, substream->stream); 701 /* clear the corresponding DAIs parameters when going to be inactive */ 702 for_each_rtd_dais(rtd, i, dai) { 703 if (snd_soc_dai_active(dai) == 0) 704 soc_pcm_set_dai_params(dai, NULL); 705 706 if (snd_soc_dai_stream_active(dai, substream->stream) == 0) 707 snd_soc_dai_digital_mute(dai, 1, substream->stream); 708 } 709 } 710 711 for_each_rtd_dais(rtd, i, dai) 712 snd_soc_dai_shutdown(dai, substream, rollback); 713 714 snd_soc_link_shutdown(substream, rollback); 715 716 soc_pcm_components_close(substream, rollback); 717 718 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 719 720 for_each_rtd_components(rtd, i, component) 721 if (!snd_soc_component_active(component)) 722 pinctrl_pm_select_sleep_state(component->dev); 723 724 return 0; 725 } 726 727 /* 728 * Called by ALSA when a PCM substream is closed. Private data can be 729 * freed here. The cpu DAI, codec DAI, machine and components are also 730 * shutdown. 731 */ 732 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 733 struct snd_pcm_substream *substream) 734 { 735 return soc_pcm_clean(rtd, substream, 0); 736 } 737 738 /* PCM close ops for non-DPCM streams */ 739 static int soc_pcm_close(struct snd_pcm_substream *substream) 740 { 741 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 742 743 snd_soc_dpcm_mutex_lock(rtd); 744 __soc_pcm_close(rtd, substream); 745 snd_soc_dpcm_mutex_unlock(rtd); 746 return 0; 747 } 748 749 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 750 { 751 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 752 struct snd_pcm_hardware *hw = &substream->runtime->hw; 753 const char *name_cpu = soc_cpu_dai_name(rtd); 754 const char *name_codec = soc_codec_dai_name(rtd); 755 const char *err_msg; 756 struct device *dev = rtd->dev; 757 758 err_msg = "rates"; 759 if (!hw->rates) 760 goto config_err; 761 762 err_msg = "formats"; 763 if (!hw->formats) 764 goto config_err; 765 766 err_msg = "channels"; 767 if (!hw->channels_min || !hw->channels_max || 768 hw->channels_min > hw->channels_max) 769 goto config_err; 770 771 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 772 name_cpu); 773 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 774 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 775 hw->channels_max); 776 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 777 hw->rate_max); 778 779 return 0; 780 781 config_err: 782 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 783 name_codec, name_cpu, err_msg); 784 return -EINVAL; 785 } 786 787 /* 788 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 789 * then initialized and any private data can be allocated. This also calls 790 * startup for the cpu DAI, component, machine and codec DAI. 791 */ 792 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 793 struct snd_pcm_substream *substream) 794 { 795 struct snd_soc_component *component; 796 struct snd_soc_dai *dai; 797 int i, ret = 0; 798 799 snd_soc_dpcm_mutex_assert_held(rtd); 800 801 for_each_rtd_components(rtd, i, component) 802 pinctrl_pm_select_default_state(component->dev); 803 804 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 805 if (ret < 0) 806 goto err; 807 808 ret = soc_pcm_components_open(substream); 809 if (ret < 0) 810 goto err; 811 812 ret = snd_soc_link_startup(substream); 813 if (ret < 0) 814 goto err; 815 816 /* startup the audio subsystem */ 817 for_each_rtd_dais(rtd, i, dai) { 818 ret = snd_soc_dai_startup(dai, substream); 819 if (ret < 0) 820 goto err; 821 } 822 823 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 824 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 825 goto dynamic; 826 827 /* Check that the codec and cpu DAIs are compatible */ 828 soc_pcm_init_runtime_hw(substream); 829 830 soc_pcm_update_symmetry(substream); 831 832 ret = soc_hw_sanity_check(substream); 833 if (ret < 0) 834 goto err; 835 836 soc_pcm_apply_msb(substream); 837 838 /* Symmetry only applies if we've already got an active stream. */ 839 for_each_rtd_dais(rtd, i, dai) { 840 ret = soc_pcm_apply_symmetry(substream, dai); 841 if (ret != 0) 842 goto err; 843 } 844 dynamic: 845 snd_soc_runtime_activate(rtd, substream->stream); 846 ret = 0; 847 err: 848 if (ret < 0) 849 soc_pcm_clean(rtd, substream, 1); 850 851 return soc_pcm_ret(rtd, ret); 852 } 853 854 /* PCM open ops for non-DPCM streams */ 855 static int soc_pcm_open(struct snd_pcm_substream *substream) 856 { 857 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 858 int ret; 859 860 snd_soc_dpcm_mutex_lock(rtd); 861 ret = __soc_pcm_open(rtd, substream); 862 snd_soc_dpcm_mutex_unlock(rtd); 863 return ret; 864 } 865 866 /* 867 * Called by ALSA when the PCM substream is prepared, can set format, sample 868 * rate, etc. This function is non atomic and can be called multiple times, 869 * it can refer to the runtime info. 870 */ 871 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 872 struct snd_pcm_substream *substream) 873 { 874 struct snd_soc_dai *dai; 875 int i, ret = 0; 876 877 snd_soc_dpcm_mutex_assert_held(rtd); 878 879 ret = snd_soc_link_prepare(substream); 880 if (ret < 0) 881 goto out; 882 883 ret = snd_soc_pcm_component_prepare(substream); 884 if (ret < 0) 885 goto out; 886 887 ret = snd_soc_pcm_dai_prepare(substream); 888 if (ret < 0) 889 goto out; 890 891 /* cancel any delayed stream shutdown that is pending */ 892 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 893 rtd->pop_wait) { 894 rtd->pop_wait = 0; 895 cancel_delayed_work(&rtd->delayed_work); 896 } 897 898 snd_soc_dapm_stream_event(rtd, substream->stream, 899 SND_SOC_DAPM_STREAM_START); 900 901 for_each_rtd_dais(rtd, i, dai) 902 snd_soc_dai_digital_mute(dai, 0, substream->stream); 903 904 out: 905 return soc_pcm_ret(rtd, ret); 906 } 907 908 /* PCM prepare ops for non-DPCM streams */ 909 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 910 { 911 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 912 int ret; 913 914 snd_soc_dpcm_mutex_lock(rtd); 915 ret = __soc_pcm_prepare(rtd, substream); 916 snd_soc_dpcm_mutex_unlock(rtd); 917 return ret; 918 } 919 920 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 921 unsigned int mask) 922 { 923 struct snd_interval *interval; 924 int channels = hweight_long(mask); 925 926 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 927 interval->min = channels; 928 interval->max = channels; 929 } 930 931 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 932 struct snd_pcm_substream *substream, int rollback) 933 { 934 struct snd_soc_dai *dai; 935 int i; 936 937 snd_soc_dpcm_mutex_assert_held(rtd); 938 939 /* run the stream event */ 940 snd_soc_dapm_stream_stop(rtd, substream->stream); 941 942 /* free any machine hw params */ 943 snd_soc_link_hw_free(substream, rollback); 944 945 /* free any component resources */ 946 snd_soc_pcm_component_hw_free(substream, rollback); 947 948 /* now free hw params for the DAIs */ 949 for_each_rtd_dais(rtd, i, dai) 950 if (snd_soc_dai_stream_valid(dai, substream->stream)) 951 snd_soc_dai_hw_free(dai, substream, rollback); 952 953 return 0; 954 } 955 956 /* 957 * Frees resources allocated by hw_params, can be called multiple times 958 */ 959 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 960 struct snd_pcm_substream *substream) 961 { 962 return soc_pcm_hw_clean(rtd, substream, 0); 963 } 964 965 /* hw_free PCM ops for non-DPCM streams */ 966 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 967 { 968 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 969 int ret; 970 971 snd_soc_dpcm_mutex_lock(rtd); 972 ret = __soc_pcm_hw_free(rtd, substream); 973 snd_soc_dpcm_mutex_unlock(rtd); 974 return ret; 975 } 976 977 /* 978 * Called by ALSA when the hardware params are set by application. This 979 * function can also be called multiple times and can allocate buffers 980 * (using snd_pcm_lib_* ). It's non-atomic. 981 */ 982 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, 983 struct snd_pcm_substream *substream, 984 struct snd_pcm_hw_params *params) 985 { 986 struct snd_soc_dai *cpu_dai; 987 struct snd_soc_dai *codec_dai; 988 int i, ret = 0; 989 990 snd_soc_dpcm_mutex_assert_held(rtd); 991 992 ret = soc_pcm_params_symmetry(substream, params); 993 if (ret) 994 goto out; 995 996 ret = snd_soc_link_hw_params(substream, params); 997 if (ret < 0) 998 goto out; 999 1000 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1001 struct snd_pcm_hw_params codec_params; 1002 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); 1003 1004 /* 1005 * Skip CODECs which don't support the current stream type, 1006 * the idea being that if a CODEC is not used for the currently 1007 * set up transfer direction, it should not need to be 1008 * configured, especially since the configuration used might 1009 * not even be supported by that CODEC. There may be cases 1010 * however where a CODEC needs to be set up although it is 1011 * actually not being used for the transfer, e.g. if a 1012 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1013 * for the DAI link including a playback-only CODEC. 1014 * If this becomes necessary, we will have to augment the 1015 * machine driver setup with information on how to act, so 1016 * we can do the right thing here. 1017 */ 1018 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1019 continue; 1020 1021 /* copy params for each codec */ 1022 codec_params = *params; 1023 1024 /* fixup params based on TDM slot masks */ 1025 if (tdm_mask) 1026 soc_pcm_codec_params_fixup(&codec_params, tdm_mask); 1027 1028 ret = snd_soc_dai_hw_params(codec_dai, substream, 1029 &codec_params); 1030 if(ret < 0) 1031 goto out; 1032 1033 soc_pcm_set_dai_params(codec_dai, &codec_params); 1034 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 1035 } 1036 1037 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1038 /* 1039 * Skip CPUs which don't support the current stream 1040 * type. See soc_pcm_init_runtime_hw() for more details 1041 */ 1042 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1043 continue; 1044 1045 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 1046 if (ret < 0) 1047 goto out; 1048 1049 /* store the parameters for each DAI */ 1050 soc_pcm_set_dai_params(cpu_dai, params); 1051 snd_soc_dapm_update_dai(substream, params, cpu_dai); 1052 } 1053 1054 ret = snd_soc_pcm_component_hw_params(substream, params); 1055 out: 1056 if (ret < 0) 1057 soc_pcm_hw_clean(rtd, substream, 1); 1058 1059 return soc_pcm_ret(rtd, ret); 1060 } 1061 1062 /* hw_params PCM ops for non-DPCM streams */ 1063 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1064 struct snd_pcm_hw_params *params) 1065 { 1066 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1067 int ret; 1068 1069 snd_soc_dpcm_mutex_lock(rtd); 1070 ret = __soc_pcm_hw_params(rtd, substream, params); 1071 snd_soc_dpcm_mutex_unlock(rtd); 1072 return ret; 1073 } 1074 1075 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1076 { 1077 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1078 struct snd_soc_component *component; 1079 int ret = -EINVAL, _ret = 0, start_dma_last = 0, i; 1080 int rollback = 0; 1081 1082 switch (cmd) { 1083 case SNDRV_PCM_TRIGGER_START: 1084 case SNDRV_PCM_TRIGGER_RESUME: 1085 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1086 /* Do we need to start dma last? */ 1087 for_each_rtd_components(rtd, i, component) { 1088 if (component->driver->start_dma_last) { 1089 start_dma_last = 1; 1090 break; 1091 } 1092 } 1093 1094 ret = snd_soc_link_trigger(substream, cmd, 0); 1095 if (ret < 0) 1096 goto start_err; 1097 1098 if (start_dma_last) { 1099 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); 1100 if (ret < 0) 1101 goto start_err; 1102 1103 ret = snd_soc_pcm_component_trigger(substream, cmd, 0); 1104 } else { 1105 ret = snd_soc_pcm_component_trigger(substream, cmd, 0); 1106 if (ret < 0) 1107 goto start_err; 1108 1109 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); 1110 } 1111 start_err: 1112 if (ret < 0) 1113 rollback = 1; 1114 } 1115 1116 if (rollback) { 1117 _ret = ret; 1118 switch (cmd) { 1119 case SNDRV_PCM_TRIGGER_START: 1120 cmd = SNDRV_PCM_TRIGGER_STOP; 1121 break; 1122 case SNDRV_PCM_TRIGGER_RESUME: 1123 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1124 break; 1125 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1126 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1127 break; 1128 } 1129 } 1130 1131 switch (cmd) { 1132 case SNDRV_PCM_TRIGGER_STOP: 1133 case SNDRV_PCM_TRIGGER_SUSPEND: 1134 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1135 if (rtd->dai_link->stop_dma_first) { 1136 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1137 if (ret < 0) 1138 break; 1139 1140 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1141 if (ret < 0) 1142 break; 1143 } else { 1144 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1145 if (ret < 0) 1146 break; 1147 1148 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1149 if (ret < 0) 1150 break; 1151 } 1152 ret = snd_soc_link_trigger(substream, cmd, rollback); 1153 break; 1154 } 1155 1156 if (_ret) 1157 ret = _ret; 1158 1159 return ret; 1160 } 1161 1162 /* 1163 * soc level wrapper for pointer callback 1164 * If cpu_dai, codec_dai, component driver has the delay callback, then 1165 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1166 */ 1167 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1168 { 1169 struct snd_pcm_runtime *runtime = substream->runtime; 1170 snd_pcm_uframes_t offset = 0; 1171 snd_pcm_sframes_t codec_delay = 0; 1172 snd_pcm_sframes_t cpu_delay = 0; 1173 1174 offset = snd_soc_pcm_component_pointer(substream); 1175 1176 /* should be called *after* snd_soc_pcm_component_pointer() */ 1177 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1178 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1179 1180 runtime->delay = cpu_delay + codec_delay; 1181 1182 return offset; 1183 } 1184 1185 /* connect a FE and BE */ 1186 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1187 struct snd_soc_pcm_runtime *be, int stream) 1188 { 1189 struct snd_pcm_substream *fe_substream; 1190 struct snd_pcm_substream *be_substream; 1191 struct snd_soc_dpcm *dpcm; 1192 1193 snd_soc_dpcm_mutex_assert_held(fe); 1194 1195 /* only add new dpcms */ 1196 for_each_dpcm_be(fe, stream, dpcm) { 1197 if (dpcm->be == be && dpcm->fe == fe) 1198 return 0; 1199 } 1200 1201 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1202 be_substream = snd_soc_dpcm_get_substream(be, stream); 1203 1204 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { 1205 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", 1206 __func__); 1207 return -EINVAL; 1208 } 1209 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1210 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1211 be_substream->pcm->nonatomic = 1; 1212 } 1213 1214 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1215 if (!dpcm) 1216 return -ENOMEM; 1217 1218 dpcm->be = be; 1219 dpcm->fe = fe; 1220 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1221 snd_soc_dpcm_stream_lock_irq(fe, stream); 1222 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1223 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1224 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1225 1226 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1227 stream ? "capture" : "playback", fe->dai_link->name, 1228 stream ? "<-" : "->", be->dai_link->name); 1229 1230 dpcm_create_debugfs_state(dpcm, stream); 1231 1232 return 1; 1233 } 1234 1235 /* reparent a BE onto another FE */ 1236 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1237 struct snd_soc_pcm_runtime *be, int stream) 1238 { 1239 struct snd_soc_dpcm *dpcm; 1240 struct snd_pcm_substream *fe_substream, *be_substream; 1241 1242 /* reparent if BE is connected to other FEs */ 1243 if (!be->dpcm[stream].users) 1244 return; 1245 1246 be_substream = snd_soc_dpcm_get_substream(be, stream); 1247 if (!be_substream) 1248 return; 1249 1250 for_each_dpcm_fe(be, stream, dpcm) { 1251 if (dpcm->fe == fe) 1252 continue; 1253 1254 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1255 stream ? "capture" : "playback", 1256 dpcm->fe->dai_link->name, 1257 stream ? "<-" : "->", dpcm->be->dai_link->name); 1258 1259 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1260 be_substream->runtime = fe_substream->runtime; 1261 break; 1262 } 1263 } 1264 1265 /* disconnect a BE and FE */ 1266 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1267 { 1268 struct snd_soc_dpcm *dpcm, *d; 1269 LIST_HEAD(deleted_dpcms); 1270 1271 snd_soc_dpcm_mutex_assert_held(fe); 1272 1273 snd_soc_dpcm_stream_lock_irq(fe, stream); 1274 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1275 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1276 stream ? "capture" : "playback", 1277 dpcm->be->dai_link->name); 1278 1279 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1280 continue; 1281 1282 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1283 stream ? "capture" : "playback", fe->dai_link->name, 1284 stream ? "<-" : "->", dpcm->be->dai_link->name); 1285 1286 /* BEs still alive need new FE */ 1287 dpcm_be_reparent(fe, dpcm->be, stream); 1288 1289 list_del(&dpcm->list_be); 1290 list_move(&dpcm->list_fe, &deleted_dpcms); 1291 } 1292 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1293 1294 while (!list_empty(&deleted_dpcms)) { 1295 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1296 list_fe); 1297 list_del(&dpcm->list_fe); 1298 dpcm_remove_debugfs_state(dpcm); 1299 kfree(dpcm); 1300 } 1301 } 1302 1303 /* get BE for DAI widget and stream */ 1304 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1305 struct snd_soc_dapm_widget *widget, int stream) 1306 { 1307 struct snd_soc_pcm_runtime *be; 1308 struct snd_soc_dapm_widget *w; 1309 struct snd_soc_dai *dai; 1310 int i; 1311 1312 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1313 1314 for_each_card_rtds(card, be) { 1315 1316 if (!be->dai_link->no_pcm) 1317 continue; 1318 1319 if (!snd_soc_dpcm_get_substream(be, stream)) 1320 continue; 1321 1322 for_each_rtd_dais(be, i, dai) { 1323 w = snd_soc_dai_get_widget(dai, stream); 1324 1325 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1326 w ? w->name : "(not set)"); 1327 1328 if (w == widget) 1329 return be; 1330 } 1331 } 1332 1333 /* Widget provided is not a BE */ 1334 return NULL; 1335 } 1336 1337 int widget_in_list(struct snd_soc_dapm_widget_list *list, 1338 struct snd_soc_dapm_widget *widget) 1339 { 1340 struct snd_soc_dapm_widget *w; 1341 int i; 1342 1343 for_each_dapm_widgets(list, i, w) 1344 if (widget == w) 1345 return 1; 1346 1347 return 0; 1348 } 1349 EXPORT_SYMBOL_GPL(widget_in_list); 1350 1351 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1352 { 1353 struct snd_soc_card *card = widget->dapm->card; 1354 struct snd_soc_pcm_runtime *rtd; 1355 int stream; 1356 1357 /* adjust dir to stream */ 1358 if (dir == SND_SOC_DAPM_DIR_OUT) 1359 stream = SNDRV_PCM_STREAM_PLAYBACK; 1360 else 1361 stream = SNDRV_PCM_STREAM_CAPTURE; 1362 1363 rtd = dpcm_get_be(card, widget, stream); 1364 if (rtd) 1365 return true; 1366 1367 return false; 1368 } 1369 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1370 1371 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1372 int stream, struct snd_soc_dapm_widget_list **list) 1373 { 1374 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1375 int paths; 1376 1377 if (fe->dai_link->num_cpus > 1) { 1378 dev_err(fe->dev, 1379 "%s doesn't support Multi CPU yet\n", __func__); 1380 return -EINVAL; 1381 } 1382 1383 /* get number of valid DAI paths and their widgets */ 1384 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1385 fe->card->component_chaining ? 1386 NULL : dpcm_end_walk_at_be); 1387 1388 if (paths > 0) 1389 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1390 stream ? "capture" : "playback"); 1391 else if (paths == 0) 1392 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1393 stream ? "capture" : "playback"); 1394 1395 return paths; 1396 } 1397 1398 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1399 { 1400 snd_soc_dapm_dai_free_widgets(list); 1401 } 1402 1403 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1404 struct snd_soc_dapm_widget_list *list) 1405 { 1406 struct snd_soc_dai *dai; 1407 unsigned int i; 1408 1409 /* is there a valid DAI widget for this BE */ 1410 for_each_rtd_dais(dpcm->be, i, dai) { 1411 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1412 1413 /* 1414 * The BE is pruned only if none of the dai 1415 * widgets are in the active list. 1416 */ 1417 if (widget && widget_in_list(list, widget)) 1418 return true; 1419 } 1420 1421 return false; 1422 } 1423 1424 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1425 struct snd_soc_dapm_widget_list **list_) 1426 { 1427 struct snd_soc_dpcm *dpcm; 1428 int prune = 0; 1429 1430 /* Destroy any old FE <--> BE connections */ 1431 for_each_dpcm_be(fe, stream, dpcm) { 1432 if (dpcm_be_is_active(dpcm, stream, *list_)) 1433 continue; 1434 1435 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1436 stream ? "capture" : "playback", 1437 dpcm->be->dai_link->name, fe->dai_link->name); 1438 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1439 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1440 prune++; 1441 } 1442 1443 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1444 return prune; 1445 } 1446 1447 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1448 struct snd_soc_dapm_widget_list **list_) 1449 { 1450 struct snd_soc_card *card = fe->card; 1451 struct snd_soc_dapm_widget_list *list = *list_; 1452 struct snd_soc_pcm_runtime *be; 1453 struct snd_soc_dapm_widget *widget; 1454 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1455 int i, new = 0, err; 1456 1457 /* don't connect if FE is not running */ 1458 if (!fe_substream->runtime && !fe->fe_compr) 1459 return new; 1460 1461 /* Create any new FE <--> BE connections */ 1462 for_each_dapm_widgets(list, i, widget) { 1463 1464 switch (widget->id) { 1465 case snd_soc_dapm_dai_in: 1466 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1467 continue; 1468 break; 1469 case snd_soc_dapm_dai_out: 1470 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1471 continue; 1472 break; 1473 default: 1474 continue; 1475 } 1476 1477 /* is there a valid BE rtd for this widget */ 1478 be = dpcm_get_be(card, widget, stream); 1479 if (!be) { 1480 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1481 widget->name); 1482 continue; 1483 } 1484 1485 /* 1486 * Filter for systems with 'component_chaining' enabled. 1487 * This helps to avoid unnecessary re-configuration of an 1488 * already active BE on such systems. 1489 */ 1490 if (fe->card->component_chaining && 1491 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1492 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1493 continue; 1494 1495 /* newly connected FE and BE */ 1496 err = dpcm_be_connect(fe, be, stream); 1497 if (err < 0) { 1498 dev_err(fe->dev, "ASoC: can't connect %s\n", 1499 widget->name); 1500 break; 1501 } else if (err == 0) /* already connected */ 1502 continue; 1503 1504 /* new */ 1505 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1506 new++; 1507 } 1508 1509 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1510 return new; 1511 } 1512 1513 /* 1514 * Find the corresponding BE DAIs that source or sink audio to this 1515 * FE substream. 1516 */ 1517 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1518 int stream, struct snd_soc_dapm_widget_list **list, int new) 1519 { 1520 if (new) 1521 return dpcm_add_paths(fe, stream, list); 1522 else 1523 return dpcm_prune_paths(fe, stream, list); 1524 } 1525 1526 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1527 { 1528 struct snd_soc_dpcm *dpcm; 1529 1530 for_each_dpcm_be(fe, stream, dpcm) 1531 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1532 } 1533 1534 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1535 int do_hw_free, struct snd_soc_dpcm *last) 1536 { 1537 struct snd_soc_dpcm *dpcm; 1538 1539 /* disable any enabled and non active backends */ 1540 for_each_dpcm_be(fe, stream, dpcm) { 1541 struct snd_soc_pcm_runtime *be = dpcm->be; 1542 struct snd_pcm_substream *be_substream = 1543 snd_soc_dpcm_get_substream(be, stream); 1544 1545 if (dpcm == last) 1546 return; 1547 1548 /* is this op for this BE ? */ 1549 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1550 continue; 1551 1552 if (be->dpcm[stream].users == 0) { 1553 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1554 stream ? "capture" : "playback", 1555 be->dpcm[stream].state); 1556 continue; 1557 } 1558 1559 if (--be->dpcm[stream].users != 0) 1560 continue; 1561 1562 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1563 if (!do_hw_free) 1564 continue; 1565 1566 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1567 __soc_pcm_hw_free(be, be_substream); 1568 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1569 } 1570 } 1571 1572 __soc_pcm_close(be, be_substream); 1573 be_substream->runtime = NULL; 1574 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1575 } 1576 } 1577 1578 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1579 { 1580 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1581 struct snd_soc_pcm_runtime *be; 1582 struct snd_soc_dpcm *dpcm; 1583 int err, count = 0; 1584 1585 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1586 for_each_dpcm_be(fe, stream, dpcm) { 1587 struct snd_pcm_substream *be_substream; 1588 1589 be = dpcm->be; 1590 be_substream = snd_soc_dpcm_get_substream(be, stream); 1591 1592 if (!be_substream) { 1593 dev_err(be->dev, "ASoC: no backend %s stream\n", 1594 stream ? "capture" : "playback"); 1595 continue; 1596 } 1597 1598 /* is this op for this BE ? */ 1599 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1600 continue; 1601 1602 /* first time the dpcm is open ? */ 1603 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1604 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1605 stream ? "capture" : "playback", 1606 be->dpcm[stream].state); 1607 continue; 1608 } 1609 1610 if (be->dpcm[stream].users++ != 0) 1611 continue; 1612 1613 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1614 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1615 continue; 1616 1617 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1618 stream ? "capture" : "playback", be->dai_link->name); 1619 1620 be_substream->runtime = fe_substream->runtime; 1621 err = __soc_pcm_open(be, be_substream); 1622 if (err < 0) { 1623 be->dpcm[stream].users--; 1624 if (be->dpcm[stream].users < 0) 1625 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1626 stream ? "capture" : "playback", 1627 be->dpcm[stream].state); 1628 1629 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1630 goto unwind; 1631 } 1632 be->dpcm[stream].be_start = 0; 1633 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1634 count++; 1635 } 1636 1637 return count; 1638 1639 unwind: 1640 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1641 1642 return soc_pcm_ret(fe, err); 1643 } 1644 1645 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1646 { 1647 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1648 struct snd_pcm_runtime *runtime = substream->runtime; 1649 struct snd_pcm_hardware *hw = &runtime->hw; 1650 struct snd_soc_dai *dai; 1651 int stream = substream->stream; 1652 u64 formats = hw->formats; 1653 int i; 1654 1655 soc_pcm_hw_init(hw); 1656 1657 if (formats) 1658 hw->formats &= formats; 1659 1660 for_each_rtd_cpu_dais(fe, i, dai) { 1661 struct snd_soc_pcm_stream *cpu_stream; 1662 1663 /* 1664 * Skip CPUs which don't support the current stream 1665 * type. See soc_pcm_init_runtime_hw() for more details 1666 */ 1667 if (!snd_soc_dai_stream_valid(dai, stream)) 1668 continue; 1669 1670 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1671 1672 soc_pcm_hw_update_rate(hw, cpu_stream); 1673 soc_pcm_hw_update_chan(hw, cpu_stream); 1674 soc_pcm_hw_update_format(hw, cpu_stream); 1675 } 1676 1677 } 1678 1679 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1680 { 1681 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1682 struct snd_pcm_runtime *runtime = substream->runtime; 1683 struct snd_pcm_hardware *hw = &runtime->hw; 1684 struct snd_soc_dpcm *dpcm; 1685 struct snd_soc_dai *dai; 1686 int stream = substream->stream; 1687 1688 if (!fe->dai_link->dpcm_merged_format) 1689 return; 1690 1691 /* 1692 * It returns merged BE codec format 1693 * if FE want to use it (= dpcm_merged_format) 1694 */ 1695 1696 for_each_dpcm_be(fe, stream, dpcm) { 1697 struct snd_soc_pcm_runtime *be = dpcm->be; 1698 struct snd_soc_pcm_stream *codec_stream; 1699 int i; 1700 1701 for_each_rtd_codec_dais(be, i, dai) { 1702 /* 1703 * Skip CODECs which don't support the current stream 1704 * type. See soc_pcm_init_runtime_hw() for more details 1705 */ 1706 if (!snd_soc_dai_stream_valid(dai, stream)) 1707 continue; 1708 1709 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1710 1711 soc_pcm_hw_update_format(hw, codec_stream); 1712 } 1713 } 1714 } 1715 1716 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1717 { 1718 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1719 struct snd_pcm_runtime *runtime = substream->runtime; 1720 struct snd_pcm_hardware *hw = &runtime->hw; 1721 struct snd_soc_dpcm *dpcm; 1722 int stream = substream->stream; 1723 1724 if (!fe->dai_link->dpcm_merged_chan) 1725 return; 1726 1727 /* 1728 * It returns merged BE codec channel; 1729 * if FE want to use it (= dpcm_merged_chan) 1730 */ 1731 1732 for_each_dpcm_be(fe, stream, dpcm) { 1733 struct snd_soc_pcm_runtime *be = dpcm->be; 1734 struct snd_soc_pcm_stream *cpu_stream; 1735 struct snd_soc_dai *dai; 1736 int i; 1737 1738 for_each_rtd_cpu_dais(be, i, dai) { 1739 /* 1740 * Skip CPUs which don't support the current stream 1741 * type. See soc_pcm_init_runtime_hw() for more details 1742 */ 1743 if (!snd_soc_dai_stream_valid(dai, stream)) 1744 continue; 1745 1746 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1747 1748 soc_pcm_hw_update_chan(hw, cpu_stream); 1749 } 1750 1751 /* 1752 * chan min/max cannot be enforced if there are multiple CODEC 1753 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1754 */ 1755 if (be->dai_link->num_codecs == 1) { 1756 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1757 asoc_rtd_to_codec(be, 0), stream); 1758 1759 soc_pcm_hw_update_chan(hw, codec_stream); 1760 } 1761 } 1762 } 1763 1764 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1765 { 1766 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1767 struct snd_pcm_runtime *runtime = substream->runtime; 1768 struct snd_pcm_hardware *hw = &runtime->hw; 1769 struct snd_soc_dpcm *dpcm; 1770 int stream = substream->stream; 1771 1772 if (!fe->dai_link->dpcm_merged_rate) 1773 return; 1774 1775 /* 1776 * It returns merged BE codec channel; 1777 * if FE want to use it (= dpcm_merged_chan) 1778 */ 1779 1780 for_each_dpcm_be(fe, stream, dpcm) { 1781 struct snd_soc_pcm_runtime *be = dpcm->be; 1782 struct snd_soc_pcm_stream *pcm; 1783 struct snd_soc_dai *dai; 1784 int i; 1785 1786 for_each_rtd_dais(be, i, dai) { 1787 /* 1788 * Skip DAIs which don't support the current stream 1789 * type. See soc_pcm_init_runtime_hw() for more details 1790 */ 1791 if (!snd_soc_dai_stream_valid(dai, stream)) 1792 continue; 1793 1794 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1795 1796 soc_pcm_hw_update_rate(hw, pcm); 1797 } 1798 } 1799 } 1800 1801 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1802 int stream) 1803 { 1804 struct snd_soc_dpcm *dpcm; 1805 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1806 struct snd_soc_dai *fe_cpu_dai; 1807 int err = 0; 1808 int i; 1809 1810 /* apply symmetry for FE */ 1811 soc_pcm_update_symmetry(fe_substream); 1812 1813 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1814 /* Symmetry only applies if we've got an active stream. */ 1815 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1816 if (err < 0) 1817 goto error; 1818 } 1819 1820 /* apply symmetry for BE */ 1821 for_each_dpcm_be(fe, stream, dpcm) { 1822 struct snd_soc_pcm_runtime *be = dpcm->be; 1823 struct snd_pcm_substream *be_substream = 1824 snd_soc_dpcm_get_substream(be, stream); 1825 struct snd_soc_pcm_runtime *rtd; 1826 struct snd_soc_dai *dai; 1827 1828 /* A backend may not have the requested substream */ 1829 if (!be_substream) 1830 continue; 1831 1832 rtd = asoc_substream_to_rtd(be_substream); 1833 if (rtd->dai_link->be_hw_params_fixup) 1834 continue; 1835 1836 soc_pcm_update_symmetry(be_substream); 1837 1838 /* Symmetry only applies if we've got an active stream. */ 1839 for_each_rtd_dais(rtd, i, dai) { 1840 err = soc_pcm_apply_symmetry(fe_substream, dai); 1841 if (err < 0) 1842 goto error; 1843 } 1844 } 1845 error: 1846 return soc_pcm_ret(fe, err); 1847 } 1848 1849 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1850 { 1851 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1852 int stream = fe_substream->stream, ret = 0; 1853 1854 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1855 1856 ret = dpcm_be_dai_startup(fe, stream); 1857 if (ret < 0) 1858 goto be_err; 1859 1860 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1861 1862 /* start the DAI frontend */ 1863 ret = __soc_pcm_open(fe, fe_substream); 1864 if (ret < 0) 1865 goto unwind; 1866 1867 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1868 1869 dpcm_runtime_setup_fe(fe_substream); 1870 1871 dpcm_runtime_setup_be_format(fe_substream); 1872 dpcm_runtime_setup_be_chan(fe_substream); 1873 dpcm_runtime_setup_be_rate(fe_substream); 1874 1875 ret = dpcm_apply_symmetry(fe_substream, stream); 1876 1877 unwind: 1878 if (ret < 0) 1879 dpcm_be_dai_startup_unwind(fe, stream); 1880 be_err: 1881 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1882 1883 return soc_pcm_ret(fe, ret); 1884 } 1885 1886 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1887 { 1888 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1889 int stream = substream->stream; 1890 1891 snd_soc_dpcm_mutex_assert_held(fe); 1892 1893 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1894 1895 /* shutdown the BEs */ 1896 dpcm_be_dai_shutdown(fe, stream); 1897 1898 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1899 1900 /* now shutdown the frontend */ 1901 __soc_pcm_close(fe, substream); 1902 1903 /* run the stream stop event */ 1904 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1905 1906 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1907 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1908 return 0; 1909 } 1910 1911 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1912 { 1913 struct snd_soc_dpcm *dpcm; 1914 1915 /* only hw_params backends that are either sinks or sources 1916 * to this frontend DAI */ 1917 for_each_dpcm_be(fe, stream, dpcm) { 1918 1919 struct snd_soc_pcm_runtime *be = dpcm->be; 1920 struct snd_pcm_substream *be_substream = 1921 snd_soc_dpcm_get_substream(be, stream); 1922 1923 /* is this op for this BE ? */ 1924 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1925 continue; 1926 1927 /* only free hw when no longer used - check all FEs */ 1928 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1929 continue; 1930 1931 /* do not free hw if this BE is used by other FE */ 1932 if (be->dpcm[stream].users > 1) 1933 continue; 1934 1935 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1936 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1937 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1938 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1939 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1940 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1941 continue; 1942 1943 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1944 be->dai_link->name); 1945 1946 __soc_pcm_hw_free(be, be_substream); 1947 1948 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1949 } 1950 } 1951 1952 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1953 { 1954 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1955 int stream = substream->stream; 1956 1957 snd_soc_dpcm_mutex_lock(fe); 1958 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1959 1960 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1961 1962 /* call hw_free on the frontend */ 1963 soc_pcm_hw_clean(fe, substream, 0); 1964 1965 /* only hw_params backends that are either sinks or sources 1966 * to this frontend DAI */ 1967 dpcm_be_dai_hw_free(fe, stream); 1968 1969 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1970 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1971 1972 snd_soc_dpcm_mutex_unlock(fe); 1973 return 0; 1974 } 1975 1976 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1977 { 1978 struct snd_soc_pcm_runtime *be; 1979 struct snd_pcm_substream *be_substream; 1980 struct snd_soc_dpcm *dpcm; 1981 int ret; 1982 1983 for_each_dpcm_be(fe, stream, dpcm) { 1984 struct snd_pcm_hw_params hw_params; 1985 1986 be = dpcm->be; 1987 be_substream = snd_soc_dpcm_get_substream(be, stream); 1988 1989 /* is this op for this BE ? */ 1990 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1991 continue; 1992 1993 /* copy params for each dpcm */ 1994 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 1995 sizeof(struct snd_pcm_hw_params)); 1996 1997 /* perform any hw_params fixups */ 1998 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 1999 if (ret < 0) 2000 goto unwind; 2001 2002 /* copy the fixed-up hw params for BE dai */ 2003 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2004 sizeof(struct snd_pcm_hw_params)); 2005 2006 /* only allow hw_params() if no connected FEs are running */ 2007 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2008 continue; 2009 2010 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2011 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2012 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2013 continue; 2014 2015 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2016 be->dai_link->name); 2017 2018 ret = __soc_pcm_hw_params(be, be_substream, &hw_params); 2019 if (ret < 0) 2020 goto unwind; 2021 2022 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2023 } 2024 return 0; 2025 2026 unwind: 2027 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2028 __func__, be->dai_link->name, ret); 2029 2030 /* disable any enabled and non active backends */ 2031 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2032 be = dpcm->be; 2033 be_substream = snd_soc_dpcm_get_substream(be, stream); 2034 2035 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2036 continue; 2037 2038 /* only allow hw_free() if no connected FEs are running */ 2039 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2040 continue; 2041 2042 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2044 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2045 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2046 continue; 2047 2048 __soc_pcm_hw_free(be, be_substream); 2049 } 2050 2051 return ret; 2052 } 2053 2054 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2055 struct snd_pcm_hw_params *params) 2056 { 2057 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2058 int ret, stream = substream->stream; 2059 2060 snd_soc_dpcm_mutex_lock(fe); 2061 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2062 2063 memcpy(&fe->dpcm[stream].hw_params, params, 2064 sizeof(struct snd_pcm_hw_params)); 2065 ret = dpcm_be_dai_hw_params(fe, stream); 2066 if (ret < 0) 2067 goto out; 2068 2069 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2070 fe->dai_link->name, params_rate(params), 2071 params_channels(params), params_format(params)); 2072 2073 /* call hw_params on the frontend */ 2074 ret = __soc_pcm_hw_params(fe, substream, params); 2075 if (ret < 0) 2076 dpcm_be_dai_hw_free(fe, stream); 2077 else 2078 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2079 2080 out: 2081 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2082 snd_soc_dpcm_mutex_unlock(fe); 2083 2084 return soc_pcm_ret(fe, ret); 2085 } 2086 2087 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2088 int cmd) 2089 { 2090 struct snd_soc_pcm_runtime *be; 2091 bool pause_stop_transition; 2092 struct snd_soc_dpcm *dpcm; 2093 unsigned long flags; 2094 int ret = 0; 2095 2096 for_each_dpcm_be(fe, stream, dpcm) { 2097 struct snd_pcm_substream *be_substream; 2098 2099 be = dpcm->be; 2100 be_substream = snd_soc_dpcm_get_substream(be, stream); 2101 2102 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); 2103 2104 /* is this op for this BE ? */ 2105 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2106 goto next; 2107 2108 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2109 be->dai_link->name, cmd); 2110 2111 switch (cmd) { 2112 case SNDRV_PCM_TRIGGER_START: 2113 if (!be->dpcm[stream].be_start && 2114 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2115 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2116 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2117 goto next; 2118 2119 be->dpcm[stream].be_start++; 2120 if (be->dpcm[stream].be_start != 1) 2121 goto next; 2122 2123 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2124 ret = soc_pcm_trigger(be_substream, 2125 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2126 else 2127 ret = soc_pcm_trigger(be_substream, 2128 SNDRV_PCM_TRIGGER_START); 2129 if (ret) { 2130 be->dpcm[stream].be_start--; 2131 goto next; 2132 } 2133 2134 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2135 break; 2136 case SNDRV_PCM_TRIGGER_RESUME: 2137 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2138 goto next; 2139 2140 be->dpcm[stream].be_start++; 2141 if (be->dpcm[stream].be_start != 1) 2142 goto next; 2143 2144 ret = soc_pcm_trigger(be_substream, cmd); 2145 if (ret) { 2146 be->dpcm[stream].be_start--; 2147 goto next; 2148 } 2149 2150 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2151 break; 2152 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2153 if (!be->dpcm[stream].be_start && 2154 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2155 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2156 goto next; 2157 2158 fe->dpcm[stream].fe_pause = false; 2159 be->dpcm[stream].be_pause--; 2160 2161 be->dpcm[stream].be_start++; 2162 if (be->dpcm[stream].be_start != 1) 2163 goto next; 2164 2165 ret = soc_pcm_trigger(be_substream, cmd); 2166 if (ret) { 2167 be->dpcm[stream].be_start--; 2168 goto next; 2169 } 2170 2171 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2172 break; 2173 case SNDRV_PCM_TRIGGER_STOP: 2174 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2175 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2176 goto next; 2177 2178 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2179 be->dpcm[stream].be_start--; 2180 2181 if (be->dpcm[stream].be_start != 0) 2182 goto next; 2183 2184 pause_stop_transition = false; 2185 if (fe->dpcm[stream].fe_pause) { 2186 pause_stop_transition = true; 2187 fe->dpcm[stream].fe_pause = false; 2188 be->dpcm[stream].be_pause--; 2189 } 2190 2191 if (be->dpcm[stream].be_pause != 0) 2192 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2193 else 2194 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2195 2196 if (ret) { 2197 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2198 be->dpcm[stream].be_start++; 2199 if (pause_stop_transition) { 2200 fe->dpcm[stream].fe_pause = true; 2201 be->dpcm[stream].be_pause++; 2202 } 2203 goto next; 2204 } 2205 2206 if (be->dpcm[stream].be_pause != 0) 2207 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2208 else 2209 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2210 2211 break; 2212 case SNDRV_PCM_TRIGGER_SUSPEND: 2213 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2214 goto next; 2215 2216 be->dpcm[stream].be_start--; 2217 if (be->dpcm[stream].be_start != 0) 2218 goto next; 2219 2220 ret = soc_pcm_trigger(be_substream, cmd); 2221 if (ret) { 2222 be->dpcm[stream].be_start++; 2223 goto next; 2224 } 2225 2226 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2227 break; 2228 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2229 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2230 goto next; 2231 2232 fe->dpcm[stream].fe_pause = true; 2233 be->dpcm[stream].be_pause++; 2234 2235 be->dpcm[stream].be_start--; 2236 if (be->dpcm[stream].be_start != 0) 2237 goto next; 2238 2239 ret = soc_pcm_trigger(be_substream, cmd); 2240 if (ret) { 2241 be->dpcm[stream].be_start++; 2242 goto next; 2243 } 2244 2245 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2246 break; 2247 } 2248 next: 2249 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2250 if (ret) 2251 break; 2252 } 2253 return soc_pcm_ret(fe, ret); 2254 } 2255 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2256 2257 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2258 int cmd, bool fe_first) 2259 { 2260 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2261 int ret; 2262 2263 /* call trigger on the frontend before the backend. */ 2264 if (fe_first) { 2265 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2266 fe->dai_link->name, cmd); 2267 2268 ret = soc_pcm_trigger(substream, cmd); 2269 if (ret < 0) 2270 return ret; 2271 2272 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2273 return ret; 2274 } 2275 2276 /* call trigger on the frontend after the backend. */ 2277 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2278 if (ret < 0) 2279 return ret; 2280 2281 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2282 fe->dai_link->name, cmd); 2283 2284 ret = soc_pcm_trigger(substream, cmd); 2285 2286 return ret; 2287 } 2288 2289 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2290 { 2291 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2292 int stream = substream->stream; 2293 int ret = 0; 2294 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2295 2296 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2297 2298 switch (trigger) { 2299 case SND_SOC_DPCM_TRIGGER_PRE: 2300 switch (cmd) { 2301 case SNDRV_PCM_TRIGGER_START: 2302 case SNDRV_PCM_TRIGGER_RESUME: 2303 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2304 case SNDRV_PCM_TRIGGER_DRAIN: 2305 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2306 break; 2307 case SNDRV_PCM_TRIGGER_STOP: 2308 case SNDRV_PCM_TRIGGER_SUSPEND: 2309 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2310 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2311 break; 2312 default: 2313 ret = -EINVAL; 2314 break; 2315 } 2316 break; 2317 case SND_SOC_DPCM_TRIGGER_POST: 2318 switch (cmd) { 2319 case SNDRV_PCM_TRIGGER_START: 2320 case SNDRV_PCM_TRIGGER_RESUME: 2321 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2322 case SNDRV_PCM_TRIGGER_DRAIN: 2323 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2324 break; 2325 case SNDRV_PCM_TRIGGER_STOP: 2326 case SNDRV_PCM_TRIGGER_SUSPEND: 2327 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2328 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2329 break; 2330 default: 2331 ret = -EINVAL; 2332 break; 2333 } 2334 break; 2335 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2336 /* bespoke trigger() - handles both FE and BEs */ 2337 2338 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2339 fe->dai_link->name, cmd); 2340 2341 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2342 break; 2343 default: 2344 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2345 fe->dai_link->name); 2346 ret = -EINVAL; 2347 goto out; 2348 } 2349 2350 if (ret < 0) { 2351 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2352 cmd, ret); 2353 goto out; 2354 } 2355 2356 switch (cmd) { 2357 case SNDRV_PCM_TRIGGER_START: 2358 case SNDRV_PCM_TRIGGER_RESUME: 2359 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2360 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2361 break; 2362 case SNDRV_PCM_TRIGGER_STOP: 2363 case SNDRV_PCM_TRIGGER_SUSPEND: 2364 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2365 break; 2366 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2367 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2368 break; 2369 } 2370 2371 out: 2372 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2373 return ret; 2374 } 2375 2376 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2377 { 2378 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2379 int stream = substream->stream; 2380 2381 /* if FE's runtime_update is already set, we're in race; 2382 * process this trigger later at exit 2383 */ 2384 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2385 fe->dpcm[stream].trigger_pending = cmd + 1; 2386 return 0; /* delayed, assuming it's successful */ 2387 } 2388 2389 /* we're alone, let's trigger */ 2390 return dpcm_fe_dai_do_trigger(substream, cmd); 2391 } 2392 2393 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2394 { 2395 struct snd_soc_dpcm *dpcm; 2396 int ret = 0; 2397 2398 for_each_dpcm_be(fe, stream, dpcm) { 2399 2400 struct snd_soc_pcm_runtime *be = dpcm->be; 2401 struct snd_pcm_substream *be_substream = 2402 snd_soc_dpcm_get_substream(be, stream); 2403 2404 /* is this op for this BE ? */ 2405 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2406 continue; 2407 2408 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2409 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2410 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2411 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2412 continue; 2413 2414 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2415 be->dai_link->name); 2416 2417 ret = __soc_pcm_prepare(be, be_substream); 2418 if (ret < 0) 2419 break; 2420 2421 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2422 } 2423 2424 return soc_pcm_ret(fe, ret); 2425 } 2426 2427 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2428 { 2429 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2430 int stream = substream->stream, ret = 0; 2431 2432 snd_soc_dpcm_mutex_lock(fe); 2433 2434 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2435 2436 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2437 2438 /* there is no point preparing this FE if there are no BEs */ 2439 if (list_empty(&fe->dpcm[stream].be_clients)) { 2440 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2441 fe->dai_link->name); 2442 ret = -EINVAL; 2443 goto out; 2444 } 2445 2446 ret = dpcm_be_dai_prepare(fe, stream); 2447 if (ret < 0) 2448 goto out; 2449 2450 /* call prepare on the frontend */ 2451 ret = __soc_pcm_prepare(fe, substream); 2452 if (ret < 0) 2453 goto out; 2454 2455 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2456 2457 out: 2458 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2459 snd_soc_dpcm_mutex_unlock(fe); 2460 2461 return soc_pcm_ret(fe, ret); 2462 } 2463 2464 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2465 { 2466 struct snd_pcm_substream *substream = 2467 snd_soc_dpcm_get_substream(fe, stream); 2468 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2469 int err; 2470 2471 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2472 stream ? "capture" : "playback", fe->dai_link->name); 2473 2474 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2475 /* call bespoke trigger - FE takes care of all BE triggers */ 2476 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2477 fe->dai_link->name); 2478 2479 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2480 } else { 2481 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2482 fe->dai_link->name); 2483 2484 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2485 } 2486 2487 dpcm_be_dai_hw_free(fe, stream); 2488 2489 dpcm_be_dai_shutdown(fe, stream); 2490 2491 /* run the stream event for each BE */ 2492 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2493 2494 return soc_pcm_ret(fe, err); 2495 } 2496 2497 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2498 { 2499 struct snd_pcm_substream *substream = 2500 snd_soc_dpcm_get_substream(fe, stream); 2501 struct snd_soc_dpcm *dpcm; 2502 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2503 int ret = 0; 2504 2505 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2506 stream ? "capture" : "playback", fe->dai_link->name); 2507 2508 /* Only start the BE if the FE is ready */ 2509 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2510 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2511 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2512 fe->dai_link->name, fe->dpcm[stream].state); 2513 ret = -EINVAL; 2514 goto disconnect; 2515 } 2516 2517 /* startup must always be called for new BEs */ 2518 ret = dpcm_be_dai_startup(fe, stream); 2519 if (ret < 0) 2520 goto disconnect; 2521 2522 /* keep going if FE state is > open */ 2523 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2524 return 0; 2525 2526 ret = dpcm_be_dai_hw_params(fe, stream); 2527 if (ret < 0) 2528 goto close; 2529 2530 /* keep going if FE state is > hw_params */ 2531 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2532 return 0; 2533 2534 ret = dpcm_be_dai_prepare(fe, stream); 2535 if (ret < 0) 2536 goto hw_free; 2537 2538 /* run the stream event for each BE */ 2539 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2540 2541 /* keep going if FE state is > prepare */ 2542 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2543 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2544 return 0; 2545 2546 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2547 /* call trigger on the frontend - FE takes care of all BE triggers */ 2548 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2549 fe->dai_link->name); 2550 2551 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2552 if (ret < 0) 2553 goto hw_free; 2554 } else { 2555 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2556 fe->dai_link->name); 2557 2558 ret = dpcm_be_dai_trigger(fe, stream, 2559 SNDRV_PCM_TRIGGER_START); 2560 if (ret < 0) 2561 goto hw_free; 2562 } 2563 2564 return 0; 2565 2566 hw_free: 2567 dpcm_be_dai_hw_free(fe, stream); 2568 close: 2569 dpcm_be_dai_shutdown(fe, stream); 2570 disconnect: 2571 /* disconnect any pending BEs */ 2572 for_each_dpcm_be(fe, stream, dpcm) { 2573 struct snd_soc_pcm_runtime *be = dpcm->be; 2574 2575 /* is this op for this BE ? */ 2576 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2577 continue; 2578 2579 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2580 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2581 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2582 } 2583 2584 return soc_pcm_ret(fe, ret); 2585 } 2586 2587 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2588 { 2589 struct snd_soc_dapm_widget_list *list; 2590 int stream; 2591 int count, paths; 2592 2593 if (!fe->dai_link->dynamic) 2594 return 0; 2595 2596 if (fe->dai_link->num_cpus > 1) { 2597 dev_err(fe->dev, 2598 "%s doesn't support Multi CPU yet\n", __func__); 2599 return -EINVAL; 2600 } 2601 2602 /* only check active links */ 2603 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2604 return 0; 2605 2606 /* DAPM sync will call this to update DSP paths */ 2607 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2608 new ? "new" : "old", fe->dai_link->name); 2609 2610 for_each_pcm_streams(stream) { 2611 2612 /* skip if FE doesn't have playback/capture capability */ 2613 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2614 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2615 continue; 2616 2617 /* skip if FE isn't currently playing/capturing */ 2618 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2619 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2620 continue; 2621 2622 paths = dpcm_path_get(fe, stream, &list); 2623 if (paths < 0) 2624 return paths; 2625 2626 /* update any playback/capture paths */ 2627 count = dpcm_process_paths(fe, stream, &list, new); 2628 if (count) { 2629 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2630 if (new) 2631 dpcm_run_update_startup(fe, stream); 2632 else 2633 dpcm_run_update_shutdown(fe, stream); 2634 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2635 2636 dpcm_clear_pending_state(fe, stream); 2637 dpcm_be_disconnect(fe, stream); 2638 } 2639 2640 dpcm_path_put(&list); 2641 } 2642 2643 return 0; 2644 } 2645 2646 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2647 * any DAI links. 2648 */ 2649 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2650 { 2651 struct snd_soc_pcm_runtime *fe; 2652 int ret = 0; 2653 2654 snd_soc_dpcm_mutex_lock(card); 2655 /* shutdown all old paths first */ 2656 for_each_card_rtds(card, fe) { 2657 ret = soc_dpcm_fe_runtime_update(fe, 0); 2658 if (ret) 2659 goto out; 2660 } 2661 2662 /* bring new paths up */ 2663 for_each_card_rtds(card, fe) { 2664 ret = soc_dpcm_fe_runtime_update(fe, 1); 2665 if (ret) 2666 goto out; 2667 } 2668 2669 out: 2670 snd_soc_dpcm_mutex_unlock(card); 2671 return ret; 2672 } 2673 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2674 2675 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2676 { 2677 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2678 struct snd_soc_dpcm *dpcm; 2679 int stream = fe_substream->stream; 2680 2681 snd_soc_dpcm_mutex_assert_held(fe); 2682 2683 /* mark FE's links ready to prune */ 2684 for_each_dpcm_be(fe, stream, dpcm) 2685 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2686 2687 dpcm_be_disconnect(fe, stream); 2688 } 2689 2690 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2691 { 2692 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2693 int ret; 2694 2695 snd_soc_dpcm_mutex_lock(fe); 2696 ret = dpcm_fe_dai_shutdown(fe_substream); 2697 2698 dpcm_fe_dai_cleanup(fe_substream); 2699 2700 snd_soc_dpcm_mutex_unlock(fe); 2701 return ret; 2702 } 2703 2704 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2705 { 2706 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2707 struct snd_soc_dapm_widget_list *list; 2708 int ret; 2709 int stream = fe_substream->stream; 2710 2711 snd_soc_dpcm_mutex_lock(fe); 2712 2713 ret = dpcm_path_get(fe, stream, &list); 2714 if (ret < 0) 2715 goto open_end; 2716 2717 /* calculate valid and active FE <-> BE dpcms */ 2718 dpcm_process_paths(fe, stream, &list, 1); 2719 2720 ret = dpcm_fe_dai_startup(fe_substream); 2721 if (ret < 0) 2722 dpcm_fe_dai_cleanup(fe_substream); 2723 2724 dpcm_clear_pending_state(fe, stream); 2725 dpcm_path_put(&list); 2726 open_end: 2727 snd_soc_dpcm_mutex_unlock(fe); 2728 return ret; 2729 } 2730 2731 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2732 int *playback, int *capture) 2733 { 2734 struct snd_soc_dai *cpu_dai; 2735 int i; 2736 2737 if (rtd->dai_link->dynamic && rtd->dai_link->num_cpus > 1) { 2738 dev_err(rtd->dev, 2739 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2740 return -EINVAL; 2741 } 2742 2743 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2744 int stream; 2745 2746 if (rtd->dai_link->dpcm_playback) { 2747 stream = SNDRV_PCM_STREAM_PLAYBACK; 2748 2749 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2750 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2751 *playback = 1; 2752 break; 2753 } 2754 } 2755 if (!*playback) { 2756 dev_err(rtd->card->dev, 2757 "No CPU DAIs support playback for stream %s\n", 2758 rtd->dai_link->stream_name); 2759 return -EINVAL; 2760 } 2761 } 2762 if (rtd->dai_link->dpcm_capture) { 2763 stream = SNDRV_PCM_STREAM_CAPTURE; 2764 2765 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2766 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2767 *capture = 1; 2768 break; 2769 } 2770 } 2771 2772 if (!*capture) { 2773 dev_err(rtd->card->dev, 2774 "No CPU DAIs support capture for stream %s\n", 2775 rtd->dai_link->stream_name); 2776 return -EINVAL; 2777 } 2778 } 2779 } else { 2780 struct snd_soc_dai *codec_dai; 2781 2782 /* Adapt stream for codec2codec links */ 2783 int cpu_capture = rtd->dai_link->c2c_params ? 2784 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2785 int cpu_playback = rtd->dai_link->c2c_params ? 2786 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2787 2788 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2789 if (rtd->dai_link->num_cpus == 1) { 2790 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2791 } else if (rtd->dai_link->num_cpus == rtd->dai_link->num_codecs) { 2792 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2793 } else { 2794 dev_err(rtd->card->dev, 2795 "N cpus to M codecs link is not supported yet\n"); 2796 return -EINVAL; 2797 } 2798 2799 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2800 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2801 *playback = 1; 2802 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2803 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2804 *capture = 1; 2805 } 2806 } 2807 2808 if (rtd->dai_link->playback_only) { 2809 *playback = 1; 2810 *capture = 0; 2811 } 2812 2813 if (rtd->dai_link->capture_only) { 2814 *playback = 0; 2815 *capture = 1; 2816 } 2817 2818 return 0; 2819 } 2820 2821 static int soc_create_pcm(struct snd_pcm **pcm, 2822 struct snd_soc_pcm_runtime *rtd, 2823 int playback, int capture, int num) 2824 { 2825 char new_name[64]; 2826 int ret; 2827 2828 /* create the PCM */ 2829 if (rtd->dai_link->c2c_params) { 2830 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2831 rtd->dai_link->stream_name); 2832 2833 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2834 playback, capture, pcm); 2835 } else if (rtd->dai_link->no_pcm) { 2836 snprintf(new_name, sizeof(new_name), "(%s)", 2837 rtd->dai_link->stream_name); 2838 2839 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2840 playback, capture, pcm); 2841 } else { 2842 if (rtd->dai_link->dynamic) 2843 snprintf(new_name, sizeof(new_name), "%s (*)", 2844 rtd->dai_link->stream_name); 2845 else 2846 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2847 rtd->dai_link->stream_name, 2848 soc_codec_dai_name(rtd), num); 2849 2850 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2851 capture, pcm); 2852 } 2853 if (ret < 0) { 2854 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2855 new_name, rtd->dai_link->name, ret); 2856 return ret; 2857 } 2858 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2859 2860 return 0; 2861 } 2862 2863 /* create a new pcm */ 2864 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2865 { 2866 struct snd_soc_component *component; 2867 struct snd_pcm *pcm; 2868 int ret = 0, playback = 0, capture = 0; 2869 int i; 2870 2871 ret = soc_get_playback_capture(rtd, &playback, &capture); 2872 if (ret < 0) 2873 return ret; 2874 2875 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2876 if (ret < 0) 2877 return ret; 2878 2879 /* DAPM dai link stream work */ 2880 /* 2881 * Currently nothing to do for c2c links 2882 * Since c2c links are internal nodes in the DAPM graph and 2883 * don't interface with the outside world or application layer 2884 * we don't have to do any special handling on close. 2885 */ 2886 if (!rtd->dai_link->c2c_params) 2887 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2888 2889 rtd->pcm = pcm; 2890 pcm->nonatomic = rtd->dai_link->nonatomic; 2891 pcm->private_data = rtd; 2892 pcm->no_device_suspend = true; 2893 2894 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { 2895 if (playback) 2896 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2897 if (capture) 2898 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2899 goto out; 2900 } 2901 2902 /* ASoC PCM operations */ 2903 if (rtd->dai_link->dynamic) { 2904 rtd->ops.open = dpcm_fe_dai_open; 2905 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2906 rtd->ops.prepare = dpcm_fe_dai_prepare; 2907 rtd->ops.trigger = dpcm_fe_dai_trigger; 2908 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2909 rtd->ops.close = dpcm_fe_dai_close; 2910 rtd->ops.pointer = soc_pcm_pointer; 2911 } else { 2912 rtd->ops.open = soc_pcm_open; 2913 rtd->ops.hw_params = soc_pcm_hw_params; 2914 rtd->ops.prepare = soc_pcm_prepare; 2915 rtd->ops.trigger = soc_pcm_trigger; 2916 rtd->ops.hw_free = soc_pcm_hw_free; 2917 rtd->ops.close = soc_pcm_close; 2918 rtd->ops.pointer = soc_pcm_pointer; 2919 } 2920 2921 for_each_rtd_components(rtd, i, component) { 2922 const struct snd_soc_component_driver *drv = component->driver; 2923 2924 if (drv->ioctl) 2925 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2926 if (drv->sync_stop) 2927 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2928 if (drv->copy_user) 2929 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2930 if (drv->page) 2931 rtd->ops.page = snd_soc_pcm_component_page; 2932 if (drv->mmap) 2933 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2934 if (drv->ack) 2935 rtd->ops.ack = snd_soc_pcm_component_ack; 2936 } 2937 2938 if (playback) 2939 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2940 2941 if (capture) 2942 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2943 2944 ret = snd_soc_pcm_component_new(rtd); 2945 if (ret < 0) 2946 return ret; 2947 out: 2948 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2949 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2950 return ret; 2951 } 2952 2953 /* is the current PCM operation for this FE ? */ 2954 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2955 { 2956 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2957 return 1; 2958 return 0; 2959 } 2960 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2961 2962 /* is the current PCM operation for this BE ? */ 2963 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2964 struct snd_soc_pcm_runtime *be, int stream) 2965 { 2966 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2967 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2968 be->dpcm[stream].runtime_update)) 2969 return 1; 2970 return 0; 2971 } 2972 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2973 2974 /* get the substream for this BE */ 2975 struct snd_pcm_substream * 2976 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2977 { 2978 return be->pcm->streams[stream].substream; 2979 } 2980 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2981 2982 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 2983 struct snd_soc_pcm_runtime *be, 2984 int stream, 2985 const enum snd_soc_dpcm_state *states, 2986 int num_states) 2987 { 2988 struct snd_soc_dpcm *dpcm; 2989 int state; 2990 int ret = 1; 2991 int i; 2992 2993 for_each_dpcm_fe(be, stream, dpcm) { 2994 2995 if (dpcm->fe == fe) 2996 continue; 2997 2998 state = dpcm->fe->dpcm[stream].state; 2999 for (i = 0; i < num_states; i++) { 3000 if (state == states[i]) { 3001 ret = 0; 3002 break; 3003 } 3004 } 3005 } 3006 3007 /* it's safe to do this BE DAI */ 3008 return ret; 3009 } 3010 3011 /* 3012 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3013 * are not running, paused or suspended for the specified stream direction. 3014 */ 3015 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3016 struct snd_soc_pcm_runtime *be, int stream) 3017 { 3018 const enum snd_soc_dpcm_state state[] = { 3019 SND_SOC_DPCM_STATE_START, 3020 SND_SOC_DPCM_STATE_PAUSED, 3021 SND_SOC_DPCM_STATE_SUSPEND, 3022 }; 3023 3024 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3025 } 3026 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3027 3028 /* 3029 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3030 * running, paused or suspended for the specified stream direction. 3031 */ 3032 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3033 struct snd_soc_pcm_runtime *be, int stream) 3034 { 3035 const enum snd_soc_dpcm_state state[] = { 3036 SND_SOC_DPCM_STATE_START, 3037 SND_SOC_DPCM_STATE_PAUSED, 3038 SND_SOC_DPCM_STATE_SUSPEND, 3039 SND_SOC_DPCM_STATE_PREPARE, 3040 }; 3041 3042 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3043 } 3044 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3045