LXR linux/sound/usb/clock.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *   Clock domain and sample rate management functions
   4 */
   5
   6#include <linux/bitops.h>
   7#include <linux/init.h>
   8#include <linux/string.h>
   9#include <linux/usb.h>
  10#include <linux/usb/audio.h>
  11#include <linux/usb/audio-v2.h>
  12#include <linux/usb/audio-v3.h>
  13
  14#include <sound/core.h>
  15#include <sound/info.h>
  16#include <sound/pcm.h>
  17
  18#include "usbaudio.h"
  19#include "card.h"
  20#include "helper.h"
  21#include "clock.h"
  22#include "quirks.h"
  23
  24static void *find_uac_clock_desc(struct usb_host_interface *iface, int id,
  25                                 bool (*validator)(void *, int), u8 type)
  26{
  27        void *cs = NULL;
  28
  29        while ((cs = snd_usb_find_csint_desc(iface->extra, iface->extralen,
  30                                             cs, type))) {
  31                if (validator(cs, id))
  32                        return cs;
  33        }
  34
  35        return NULL;
  36}
  37
  38static bool validate_clock_source_v2(void *p, int id)
  39{
  40        struct uac_clock_source_descriptor *cs = p;
  41        return cs->bClockID == id;
  42}
  43
  44static bool validate_clock_source_v3(void *p, int id)
  45{
  46        struct uac3_clock_source_descriptor *cs = p;
  47        return cs->bClockID == id;
  48}
  49
  50static bool validate_clock_selector_v2(void *p, int id)
  51{
  52        struct uac_clock_selector_descriptor *cs = p;
  53        return cs->bClockID == id;
  54}
  55
  56static bool validate_clock_selector_v3(void *p, int id)
  57{
  58        struct uac3_clock_selector_descriptor *cs = p;
  59        return cs->bClockID == id;
  60}
  61
  62static bool validate_clock_multiplier_v2(void *p, int id)
  63{
  64        struct uac_clock_multiplier_descriptor *cs = p;
  65        return cs->bClockID == id;
  66}
  67
  68static bool validate_clock_multiplier_v3(void *p, int id)
  69{
  70        struct uac3_clock_multiplier_descriptor *cs = p;
  71        return cs->bClockID == id;
  72}
  73
  74#define DEFINE_FIND_HELPER(name, obj, validator, type)          \
  75static obj *name(struct usb_host_interface *iface, int id)      \
  76{                                                               \
  77        return find_uac_clock_desc(iface, id, validator, type); \
  78}
  79
  80DEFINE_FIND_HELPER(snd_usb_find_clock_source,
  81                   struct uac_clock_source_descriptor,
  82                   validate_clock_source_v2, UAC2_CLOCK_SOURCE);
  83DEFINE_FIND_HELPER(snd_usb_find_clock_source_v3,
  84                   struct uac3_clock_source_descriptor,
  85                   validate_clock_source_v3, UAC3_CLOCK_SOURCE);
  86
  87DEFINE_FIND_HELPER(snd_usb_find_clock_selector,
  88                   struct uac_clock_selector_descriptor,
  89                   validate_clock_selector_v2, UAC2_CLOCK_SELECTOR);
  90DEFINE_FIND_HELPER(snd_usb_find_clock_selector_v3,
  91                   struct uac3_clock_selector_descriptor,
  92                   validate_clock_selector_v3, UAC3_CLOCK_SELECTOR);
  93
  94DEFINE_FIND_HELPER(snd_usb_find_clock_multiplier,
  95                   struct uac_clock_multiplier_descriptor,
  96                   validate_clock_multiplier_v2, UAC2_CLOCK_MULTIPLIER);
  97DEFINE_FIND_HELPER(snd_usb_find_clock_multiplier_v3,
  98                   struct uac3_clock_multiplier_descriptor,
  99                   validate_clock_multiplier_v3, UAC3_CLOCK_MULTIPLIER);
 100
 101static int uac_clock_selector_get_val(struct snd_usb_audio *chip, int selector_id)
 102{
 103        unsigned char buf;
 104        int ret;
 105
 106        ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0),
 107                              UAC2_CS_CUR,
 108                              USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
 109                              UAC2_CX_CLOCK_SELECTOR << 8,
 110                              snd_usb_ctrl_intf(chip) | (selector_id << 8),
 111                              &buf, sizeof(buf));
 112
 113        if (ret < 0)
 114                return ret;
 115
 116        return buf;
 117}
 118
 119static int uac_clock_selector_set_val(struct snd_usb_audio *chip, int selector_id,
 120                                        unsigned char pin)
 121{
 122        int ret;
 123
 124        ret = snd_usb_ctl_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0),
 125                              UAC2_CS_CUR,
 126                              USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
 127                              UAC2_CX_CLOCK_SELECTOR << 8,
 128                              snd_usb_ctrl_intf(chip) | (selector_id << 8),
 129                              &pin, sizeof(pin));
 130        if (ret < 0)
 131                return ret;
 132
 133        if (ret != sizeof(pin)) {
 134                usb_audio_err(chip,
 135                        "setting selector (id %d) unexpected length %d\n",
 136                        selector_id, ret);
 137                return -EINVAL;
 138        }
 139
 140        ret = uac_clock_selector_get_val(chip, selector_id);
 141        if (ret < 0)
 142                return ret;
 143
 144        if (ret != pin) {
 145                usb_audio_err(chip,
 146                        "setting selector (id %d) to %x failed (current: %d)\n",
 147                        selector_id, pin, ret);
 148                return -EINVAL;
 149        }
 150
 151        return ret;
 152}
 153
 154static bool uac_clock_source_is_valid_quirk(struct snd_usb_audio *chip,
 155                                            struct audioformat *fmt,
 156                                            int source_id)
 157{
 158        bool ret = false;
 159        int count;
 160        unsigned char data;
 161        struct usb_device *dev = chip->dev;
 162
 163        if (fmt->protocol == UAC_VERSION_2) {
 164                struct uac_clock_source_descriptor *cs_desc =
 165                        snd_usb_find_clock_source(chip->ctrl_intf, source_id);
 166
 167                if (!cs_desc)
 168                        return false;
 169
 170                /*
 171                 * Assume the clock is valid if clock source supports only one
 172                 * single sample rate, the terminal is connected directly to it
 173                 * (there is no clock selector) and clock type is internal.
 174                 * This is to deal with some Denon DJ controllers that always
 175                 * reports that clock is invalid.
 176                 */
 177                if (fmt->nr_rates == 1 &&
 178                    (fmt->clock & 0xff) == cs_desc->bClockID &&
 179                    (cs_desc->bmAttributes & 0x3) !=
 180                                UAC_CLOCK_SOURCE_TYPE_EXT)
 181                        return true;
 182        }
 183
 184        /*
 185         * MOTU MicroBook IIc
 186         * Sample rate changes takes more than 2 seconds for this device. Clock
 187         * validity request returns false during that period.
 188         */
 189        if (chip->usb_id == USB_ID(0x07fd, 0x0004)) {
 190                count = 0;
 191
 192                while ((!ret) && (count < 50)) {
 193                        int err;
 194
 195                        msleep(100);
 196
 197                        err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
 198                                              USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 199                                              UAC2_CS_CONTROL_CLOCK_VALID << 8,
 200                                              snd_usb_ctrl_intf(chip) | (source_id << 8),
 201                                              &data, sizeof(data));
 202                        if (err < 0) {
 203                                dev_warn(&dev->dev,
 204                                         "%s(): cannot get clock validity for id %d\n",
 205                                           __func__, source_id);
 206                                return false;
 207                        }
 208
 209                        ret = !!data;
 210                        count++;
 211                }
 212        }
 213
 214        return ret;
 215}
 216
 217static bool uac_clock_source_is_valid(struct snd_usb_audio *chip,
 218                                      struct audioformat *fmt,
 219                                      int source_id)
 220{
 221        int err;
 222        unsigned char data;
 223        struct usb_device *dev = chip->dev;
 224        u32 bmControls;
 225
 226        if (fmt->protocol == UAC_VERSION_3) {
 227                struct uac3_clock_source_descriptor *cs_desc =
 228                        snd_usb_find_clock_source_v3(chip->ctrl_intf, source_id);
 229
 230                if (!cs_desc)
 231                        return false;
 232                bmControls = le32_to_cpu(cs_desc->bmControls);
 233        } else { /* UAC_VERSION_1/2 */
 234                struct uac_clock_source_descriptor *cs_desc =
 235                        snd_usb_find_clock_source(chip->ctrl_intf, source_id);
 236
 237                if (!cs_desc)
 238                        return false;
 239                bmControls = cs_desc->bmControls;
 240        }
 241
 242        /* If a clock source can't tell us whether it's valid, we assume it is */
 243        if (!uac_v2v3_control_is_readable(bmControls,
 244                                      UAC2_CS_CONTROL_CLOCK_VALID))
 245                return true;
 246
 247        err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
 248                              USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 249                              UAC2_CS_CONTROL_CLOCK_VALID << 8,
 250                              snd_usb_ctrl_intf(chip) | (source_id << 8),
 251                              &data, sizeof(data));
 252
 253        if (err < 0) {
 254                dev_warn(&dev->dev,
 255                         "%s(): cannot get clock validity for id %d\n",
 256                           __func__, source_id);
 257                return false;
 258        }
 259
 260        if (data)
 261                return true;
 262        else
 263                return uac_clock_source_is_valid_quirk(chip, fmt, source_id);
 264}
 265
 266static int __uac_clock_find_source(struct snd_usb_audio *chip,
 267                                   struct audioformat *fmt, int entity_id,
 268                                   unsigned long *visited, bool validate)
 269{
 270        struct uac_clock_source_descriptor *source;
 271        struct uac_clock_selector_descriptor *selector;
 272        struct uac_clock_multiplier_descriptor *multiplier;
 273
 274        entity_id &= 0xff;
 275
 276        if (test_and_set_bit(entity_id, visited)) {
 277                usb_audio_warn(chip,
 278                         "%s(): recursive clock topology detected, id %d.\n",
 279                         __func__, entity_id);
 280                return -EINVAL;
 281        }
 282
 283        /* first, see if the ID we're looking for is a clock source already */
 284        source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id);
 285        if (source) {
 286                entity_id = source->bClockID;
 287                if (validate && !uac_clock_source_is_valid(chip, fmt,
 288                                                                entity_id)) {
 289                        usb_audio_err(chip,
 290                                "clock source %d is not valid, cannot use\n",
 291                                entity_id);
 292                        return -ENXIO;
 293                }
 294                return entity_id;
 295        }
 296
 297        selector = snd_usb_find_clock_selector(chip->ctrl_intf, entity_id);
 298        if (selector) {
 299                int ret, i, cur;
 300
 301                /* the entity ID we are looking for is a selector.
 302                 * find out what it currently selects */
 303                ret = uac_clock_selector_get_val(chip, selector->bClockID);
 304                if (ret < 0)
 305                        return ret;
 306
 307                /* Selector values are one-based */
 308
 309                if (ret > selector->bNrInPins || ret < 1) {
 310                        usb_audio_err(chip,
 311                                "%s(): selector reported illegal value, id %d, ret %d\n",
 312                                __func__, selector->bClockID, ret);
 313
 314                        return -EINVAL;
 315                }
 316
 317                cur = ret;
 318                ret = __uac_clock_find_source(chip, fmt,
 319                                              selector->baCSourceID[ret - 1],
 320                                              visited, validate);
 321                if (!validate || ret > 0 || !chip->autoclock)
 322                        return ret;
 323
 324                /* The current clock source is invalid, try others. */
 325                for (i = 1; i <= selector->bNrInPins; i++) {
 326                        int err;
 327
 328                        if (i == cur)
 329                                continue;
 330
 331                        ret = __uac_clock_find_source(chip, fmt,
 332                                                      selector->baCSourceID[i - 1],
 333                                                      visited, true);
 334                        if (ret < 0)
 335                                continue;
 336
 337                        err = uac_clock_selector_set_val(chip, entity_id, i);
 338                        if (err < 0)
 339                                continue;
 340
 341                        usb_audio_info(chip,
 342                                 "found and selected valid clock source %d\n",
 343                                 ret);
 344                        return ret;
 345                }
 346
 347                return -ENXIO;
 348        }
 349
 350        /* FIXME: multipliers only act as pass-thru element for now */
 351        multiplier = snd_usb_find_clock_multiplier(chip->ctrl_intf, entity_id);
 352        if (multiplier)
 353                return __uac_clock_find_source(chip, fmt,
 354                                               multiplier->bCSourceID,
 355                                               visited, validate);
 356
 357        return -EINVAL;
 358}
 359
 360static int __uac3_clock_find_source(struct snd_usb_audio *chip,
 361                                    struct audioformat *fmt, int entity_id,
 362                                    unsigned long *visited, bool validate)
 363{
 364        struct uac3_clock_source_descriptor *source;
 365        struct uac3_clock_selector_descriptor *selector;
 366        struct uac3_clock_multiplier_descriptor *multiplier;
 367
 368        entity_id &= 0xff;
 369
 370        if (test_and_set_bit(entity_id, visited)) {
 371                usb_audio_warn(chip,
 372                         "%s(): recursive clock topology detected, id %d.\n",
 373                         __func__, entity_id);
 374                return -EINVAL;
 375        }
 376
 377        /* first, see if the ID we're looking for is a clock source already */
 378        source = snd_usb_find_clock_source_v3(chip->ctrl_intf, entity_id);
 379        if (source) {
 380                entity_id = source->bClockID;
 381                if (validate && !uac_clock_source_is_valid(chip, fmt,
 382                                                                entity_id)) {
 383                        usb_audio_err(chip,
 384                                "clock source %d is not valid, cannot use\n",
 385                                entity_id);
 386                        return -ENXIO;
 387                }
 388                return entity_id;
 389        }
 390
 391        selector = snd_usb_find_clock_selector_v3(chip->ctrl_intf, entity_id);
 392        if (selector) {
 393                int ret, i, cur;
 394
 395                /* the entity ID we are looking for is a selector.
 396                 * find out what it currently selects */
 397                ret = uac_clock_selector_get_val(chip, selector->bClockID);
 398                if (ret < 0)
 399                        return ret;
 400
 401                /* Selector values are one-based */
 402
 403                if (ret > selector->bNrInPins || ret < 1) {
 404                        usb_audio_err(chip,
 405                                "%s(): selector reported illegal value, id %d, ret %d\n",
 406                                __func__, selector->bClockID, ret);
 407
 408                        return -EINVAL;
 409                }
 410
 411                cur = ret;
 412                ret = __uac3_clock_find_source(chip, fmt,
 413                                               selector->baCSourceID[ret - 1],
 414                                               visited, validate);
 415                if (!validate || ret > 0 || !chip->autoclock)
 416                        return ret;
 417
 418                /* The current clock source is invalid, try others. */
 419                for (i = 1; i <= selector->bNrInPins; i++) {
 420                        int err;
 421
 422                        if (i == cur)
 423                                continue;
 424
 425                        ret = __uac3_clock_find_source(chip, fmt,
 426                                                       selector->baCSourceID[i - 1],
 427                                                       visited, true);
 428                        if (ret < 0)
 429                                continue;
 430
 431                        err = uac_clock_selector_set_val(chip, entity_id, i);
 432                        if (err < 0)
 433                                continue;
 434
 435                        usb_audio_info(chip,
 436                                 "found and selected valid clock source %d\n",
 437                                 ret);
 438                        return ret;
 439                }
 440
 441                return -ENXIO;
 442        }
 443
 444        /* FIXME: multipliers only act as pass-thru element for now */
 445        multiplier = snd_usb_find_clock_multiplier_v3(chip->ctrl_intf,
 446                                                      entity_id);
 447        if (multiplier)
 448                return __uac3_clock_find_source(chip, fmt,
 449                                                multiplier->bCSourceID,
 450                                                visited, validate);
 451
 452        return -EINVAL;
 453}
 454
 455/*
 456 * For all kinds of sample rate settings and other device queries,
 457 * the clock source (end-leaf) must be used. However, clock selectors,
 458 * clock multipliers and sample rate converters may be specified as
 459 * clock source input to terminal. This functions walks the clock path
 460 * to its end and tries to find the source.
 461 *
 462 * The 'visited' bitfield is used internally to detect recursive loops.
 463 *
 464 * Returns the clock source UnitID (>=0) on success, or an error.
 465 */
 466int snd_usb_clock_find_source(struct snd_usb_audio *chip,
 467                              struct audioformat *fmt, bool validate)
 468{
 469        DECLARE_BITMAP(visited, 256);
 470        memset(visited, 0, sizeof(visited));
 471
 472        switch (fmt->protocol) {
 473        case UAC_VERSION_2:
 474                return __uac_clock_find_source(chip, fmt, fmt->clock, visited,
 475                                               validate);
 476        case UAC_VERSION_3:
 477                return __uac3_clock_find_source(chip, fmt, fmt->clock, visited,
 478                                               validate);
 479        default:
 480                return -EINVAL;
 481        }
 482}
 483
 484static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface,
 485                              struct usb_host_interface *alts,
 486                              struct audioformat *fmt, int rate)
 487{
 488        struct usb_device *dev = chip->dev;
 489        unsigned int ep;
 490        unsigned char data[3];
 491        int err, crate;
 492
 493        if (get_iface_desc(alts)->bNumEndpoints < 1)
 494                return -EINVAL;
 495        ep = get_endpoint(alts, 0)->bEndpointAddress;
 496
 497        /* if endpoint doesn't have sampling rate control, bail out */
 498        if (!(fmt->attributes & UAC_EP_CS_ATTR_SAMPLE_RATE))
 499                return 0;
 500
 501        data[0] = rate;
 502        data[1] = rate >> 8;
 503        data[2] = rate >> 16;
 504        err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
 505                              USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 506                              UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep,
 507                              data, sizeof(data));
 508        if (err < 0) {
 509                dev_err(&dev->dev, "%d:%d: cannot set freq %d to ep %#x\n",
 510                        iface, fmt->altsetting, rate, ep);
 511                return err;
 512        }
 513
 514        /* Don't check the sample rate for devices which we know don't
 515         * support reading */
 516        if (snd_usb_get_sample_rate_quirk(chip))
 517                return 0;
 518        /* the firmware is likely buggy, don't repeat to fail too many times */
 519        if (chip->sample_rate_read_error > 2)
 520                return 0;
 521
 522        err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC_GET_CUR,
 523                              USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_IN,
 524                              UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep,
 525                              data, sizeof(data));
 526        if (err < 0) {
 527                dev_err(&dev->dev, "%d:%d: cannot get freq at ep %#x\n",
 528                        iface, fmt->altsetting, ep);
 529                chip->sample_rate_read_error++;
 530                return 0; /* some devices don't support reading */
 531        }
 532
 533        crate = data[0] | (data[1] << 8) | (data[2] << 16);
 534        if (crate != rate) {
 535                dev_warn(&dev->dev, "current rate %d is different from the runtime rate %d\n", crate, rate);
 536                // runtime->rate = crate;
 537        }
 538
 539        return 0;
 540}
 541
 542static int get_sample_rate_v2v3(struct snd_usb_audio *chip, int iface,
 543                              int altsetting, int clock)
 544{
 545        struct usb_device *dev = chip->dev;
 546        __le32 data;
 547        int err;
 548
 549        err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
 550                              USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 551                              UAC2_CS_CONTROL_SAM_FREQ << 8,
 552                              snd_usb_ctrl_intf(chip) | (clock << 8),
 553                              &data, sizeof(data));
 554        if (err < 0) {
 555                dev_warn(&dev->dev, "%d:%d: cannot get freq (v2/v3): err %d\n",
 556                         iface, altsetting, err);
 557                return 0;
 558        }
 559
 560        return le32_to_cpu(data);
 561}
 562
 563static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface,
 564                              struct usb_host_interface *alts,
 565                              struct audioformat *fmt, int rate)
 566{
 567        struct usb_device *dev = chip->dev;
 568        __le32 data;
 569        int err, cur_rate, prev_rate;
 570        int clock;
 571        bool writeable;
 572        u32 bmControls;
 573
 574        /* First, try to find a valid clock. This may trigger
 575         * automatic clock selection if the current clock is not
 576         * valid.
 577         */
 578        clock = snd_usb_clock_find_source(chip, fmt, true);
 579        if (clock < 0) {
 580                /* We did not find a valid clock, but that might be
 581                 * because the current sample rate does not match an
 582                 * external clock source. Try again without validation
 583                 * and we will do another validation after setting the
 584                 * rate.
 585                 */
 586                clock = snd_usb_clock_find_source(chip, fmt, false);
 587                if (clock < 0)
 588                        return clock;
 589        }
 590
 591        prev_rate = get_sample_rate_v2v3(chip, iface, fmt->altsetting, clock);
 592        if (prev_rate == rate)
 593                goto validation;
 594
 595        if (fmt->protocol == UAC_VERSION_3) {
 596                struct uac3_clock_source_descriptor *cs_desc;
 597
 598                cs_desc = snd_usb_find_clock_source_v3(chip->ctrl_intf, clock);
 599                bmControls = le32_to_cpu(cs_desc->bmControls);
 600        } else {
 601                struct uac_clock_source_descriptor *cs_desc;
 602
 603                cs_desc = snd_usb_find_clock_source(chip->ctrl_intf, clock);
 604                bmControls = cs_desc->bmControls;
 605        }
 606
 607        writeable = uac_v2v3_control_is_writeable(bmControls,
 608                                                  UAC2_CS_CONTROL_SAM_FREQ);
 609        if (writeable) {
 610                data = cpu_to_le32(rate);
 611                err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
 612                                      USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
 613                                      UAC2_CS_CONTROL_SAM_FREQ << 8,
 614                                      snd_usb_ctrl_intf(chip) | (clock << 8),
 615                                      &data, sizeof(data));
 616                if (err < 0) {
 617                        usb_audio_err(chip,
 618                                "%d:%d: cannot set freq %d (v2/v3): err %d\n",
 619                                iface, fmt->altsetting, rate, err);
 620                        return err;
 621                }
 622
 623                cur_rate = get_sample_rate_v2v3(chip, iface,
 624                                                fmt->altsetting, clock);
 625        } else {
 626                cur_rate = prev_rate;
 627        }
 628
 629        if (cur_rate != rate) {
 630                if (!writeable) {
 631                        usb_audio_warn(chip,
 632                                 "%d:%d: freq mismatch (RO clock): req %d, clock runs @%d\n",
 633                                 iface, fmt->altsetting, rate, cur_rate);
 634                        return -ENXIO;
 635                }
 636                usb_audio_dbg(chip,
 637                        "current rate %d is different from the runtime rate %d\n",
 638                        cur_rate, rate);
 639        }
 640
 641        /* Some devices doesn't respond to sample rate changes while the
 642         * interface is active. */
 643        if (rate != prev_rate) {
 644                usb_set_interface(dev, iface, 0);
 645                snd_usb_set_interface_quirk(dev);
 646                usb_set_interface(dev, iface, fmt->altsetting);
 647                snd_usb_set_interface_quirk(dev);
 648        }
 649
 650validation:
 651        /* validate clock after rate change */
 652        if (!uac_clock_source_is_valid(chip, fmt, clock))
 653                return -ENXIO;
 654        return 0;
 655}
 656
 657int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
 658                             struct usb_host_interface *alts,
 659                             struct audioformat *fmt, int rate)
 660{
 661        switch (fmt->protocol) {
 662        case UAC_VERSION_1:
 663        default:
 664                return set_sample_rate_v1(chip, iface, alts, fmt, rate);
 665
 666        case UAC_VERSION_3:
 667                if (chip->badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
 668                        if (rate != UAC3_BADD_SAMPLING_RATE)
 669                                return -ENXIO;
 670                        else
 671                                return 0;
 672                }
 673        /* fall through */
 674        case UAC_VERSION_2:
 675                return set_sample_rate_v2v3(chip, iface, alts, fmt, rate);
 676        }
 677}
 678
 679