1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * HDMI Channel map support helpers 4 */ 5 6 #include <linux/module.h> 7 #include <sound/control.h> 8 #include <sound/tlv.h> 9 #include <sound/hda_chmap.h> 10 11 /* 12 * CEA speaker placement: 13 * 14 * FLH FCH FRH 15 * FLW FL FLC FC FRC FR FRW 16 * 17 * LFE 18 * TC 19 * 20 * RL RLC RC RRC RR 21 * 22 * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to 23 * CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC. 24 */ 25 enum cea_speaker_placement { 26 FL = (1 << 0), /* Front Left */ 27 FC = (1 << 1), /* Front Center */ 28 FR = (1 << 2), /* Front Right */ 29 FLC = (1 << 3), /* Front Left Center */ 30 FRC = (1 << 4), /* Front Right Center */ 31 RL = (1 << 5), /* Rear Left */ 32 RC = (1 << 6), /* Rear Center */ 33 RR = (1 << 7), /* Rear Right */ 34 RLC = (1 << 8), /* Rear Left Center */ 35 RRC = (1 << 9), /* Rear Right Center */ 36 LFE = (1 << 10), /* Low Frequency Effect */ 37 FLW = (1 << 11), /* Front Left Wide */ 38 FRW = (1 << 12), /* Front Right Wide */ 39 FLH = (1 << 13), /* Front Left High */ 40 FCH = (1 << 14), /* Front Center High */ 41 FRH = (1 << 15), /* Front Right High */ 42 TC = (1 << 16), /* Top Center */ 43 }; 44 45 static const char * const cea_speaker_allocation_names[] = { 46 /* 0 */ "FL/FR", 47 /* 1 */ "LFE", 48 /* 2 */ "FC", 49 /* 3 */ "RL/RR", 50 /* 4 */ "RC", 51 /* 5 */ "FLC/FRC", 52 /* 6 */ "RLC/RRC", 53 /* 7 */ "FLW/FRW", 54 /* 8 */ "FLH/FRH", 55 /* 9 */ "TC", 56 /* 10 */ "FCH", 57 }; 58 59 /* 60 * ELD SA bits in the CEA Speaker Allocation data block 61 */ 62 static const int eld_speaker_allocation_bits[] = { 63 [0] = FL | FR, 64 [1] = LFE, 65 [2] = FC, 66 [3] = RL | RR, 67 [4] = RC, 68 [5] = FLC | FRC, 69 [6] = RLC | RRC, 70 /* the following are not defined in ELD yet */ 71 [7] = FLW | FRW, 72 [8] = FLH | FRH, 73 [9] = TC, 74 [10] = FCH, 75 }; 76 77 /* 78 * ALSA sequence is: 79 * 80 * surround40 surround41 surround50 surround51 surround71 81 * ch0 front left = = = = 82 * ch1 front right = = = = 83 * ch2 rear left = = = = 84 * ch3 rear right = = = = 85 * ch4 LFE center center center 86 * ch5 LFE LFE 87 * ch6 side left 88 * ch7 side right 89 * 90 * surround71 = {FL, FR, RLC, RRC, FC, LFE, RL, RR} 91 */ 92 static int hdmi_channel_mapping[0x32][8] = { 93 /* stereo */ 94 [0x00] = { 0x00, 0x11, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 }, 95 /* 2.1 */ 96 [0x01] = { 0x00, 0x11, 0x22, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 }, 97 /* Dolby Surround */ 98 [0x02] = { 0x00, 0x11, 0x23, 0xf2, 0xf4, 0xf5, 0xf6, 0xf7 }, 99 /* surround40 */ 100 [0x08] = { 0x00, 0x11, 0x24, 0x35, 0xf3, 0xf2, 0xf6, 0xf7 }, 101 /* 4ch */ 102 [0x03] = { 0x00, 0x11, 0x23, 0x32, 0x44, 0xf5, 0xf6, 0xf7 }, 103 /* surround41 */ 104 [0x09] = { 0x00, 0x11, 0x24, 0x35, 0x42, 0xf3, 0xf6, 0xf7 }, 105 /* surround50 */ 106 [0x0a] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0xf2, 0xf6, 0xf7 }, 107 /* surround51 */ 108 [0x0b] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0x52, 0xf6, 0xf7 }, 109 /* 7.1 */ 110 [0x13] = { 0x00, 0x11, 0x26, 0x37, 0x43, 0x52, 0x64, 0x75 }, 111 }; 112 113 /* 114 * This is an ordered list! 115 * 116 * The preceding ones have better chances to be selected by 117 * hdmi_channel_allocation(). 118 */ 119 static struct hdac_cea_channel_speaker_allocation channel_allocations[] = { 120 /* channel: 7 6 5 4 3 2 1 0 */ 121 { .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } }, 122 /* 2.1 */ 123 { .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } }, 124 /* Dolby Surround */ 125 { .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } }, 126 /* surround40 */ 127 { .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } }, 128 /* surround41 */ 129 { .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } }, 130 /* surround50 */ 131 { .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } }, 132 /* surround51 */ 133 { .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } }, 134 /* 6.1 */ 135 { .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } }, 136 /* surround71 */ 137 { .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } }, 138 139 { .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } }, 140 { .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } }, 141 { .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } }, 142 { .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } }, 143 { .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } }, 144 { .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } }, 145 { .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } }, 146 { .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } }, 147 { .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } }, 148 { .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } }, 149 { .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } }, 150 { .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } }, 151 { .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } }, 152 { .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } }, 153 { .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } }, 154 { .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } }, 155 { .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } }, 156 { .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } }, 157 { .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } }, 158 { .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } }, 159 { .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } }, 160 { .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } }, 161 { .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } }, 162 { .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL } }, 163 { .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL } }, 164 { .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL } }, 165 { .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL } }, 166 { .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL } }, 167 { .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL } }, 168 { .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL } }, 169 { .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL } }, 170 { .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL } }, 171 { .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL } }, 172 { .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL } }, 173 { .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL } }, 174 { .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL } }, 175 { .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL } }, 176 { .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL } }, 177 { .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL } }, 178 { .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL } }, 179 { .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } }, 180 }; 181 182 static int hdmi_pin_set_slot_channel(struct hdac_device *codec, 183 hda_nid_t pin_nid, int asp_slot, int channel) 184 { 185 return snd_hdac_codec_write(codec, pin_nid, 0, 186 AC_VERB_SET_HDMI_CHAN_SLOT, 187 (channel << 4) | asp_slot); 188 } 189 190 static int hdmi_pin_get_slot_channel(struct hdac_device *codec, 191 hda_nid_t pin_nid, int asp_slot) 192 { 193 return (snd_hdac_codec_read(codec, pin_nid, 0, 194 AC_VERB_GET_HDMI_CHAN_SLOT, 195 asp_slot) & 0xf0) >> 4; 196 } 197 198 static int hdmi_get_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid) 199 { 200 return 1 + snd_hdac_codec_read(codec, cvt_nid, 0, 201 AC_VERB_GET_CVT_CHAN_COUNT, 0); 202 } 203 204 static void hdmi_set_channel_count(struct hdac_device *codec, 205 hda_nid_t cvt_nid, int chs) 206 { 207 if (chs != hdmi_get_channel_count(codec, cvt_nid)) 208 snd_hdac_codec_write(codec, cvt_nid, 0, 209 AC_VERB_SET_CVT_CHAN_COUNT, chs - 1); 210 } 211 212 /* 213 * Channel mapping routines 214 */ 215 216 /* 217 * Compute derived values in channel_allocations[]. 218 */ 219 static void init_channel_allocations(void) 220 { 221 int i, j; 222 struct hdac_cea_channel_speaker_allocation *p; 223 224 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { 225 p = channel_allocations + i; 226 p->channels = 0; 227 p->spk_mask = 0; 228 for (j = 0; j < ARRAY_SIZE(p->speakers); j++) 229 if (p->speakers[j]) { 230 p->channels++; 231 p->spk_mask |= p->speakers[j]; 232 } 233 } 234 } 235 236 static int get_channel_allocation_order(int ca) 237 { 238 int i; 239 240 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { 241 if (channel_allocations[i].ca_index == ca) 242 break; 243 } 244 return i; 245 } 246 247 void snd_hdac_print_channel_allocation(int spk_alloc, char *buf, int buflen) 248 { 249 int i, j; 250 251 for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) { 252 if (spk_alloc & (1 << i)) 253 j += scnprintf(buf + j, buflen - j, " %s", 254 cea_speaker_allocation_names[i]); 255 } 256 buf[j] = '\0'; /* necessary when j == 0 */ 257 } 258 EXPORT_SYMBOL_GPL(snd_hdac_print_channel_allocation); 259 260 /* 261 * The transformation takes two steps: 262 * 263 * eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask 264 * spk_mask => (channel_allocations[]) => ai->CA 265 * 266 * TODO: it could select the wrong CA from multiple candidates. 267 */ 268 static int hdmi_channel_allocation_spk_alloc_blk(struct hdac_device *codec, 269 int spk_alloc, int channels) 270 { 271 int i; 272 int ca = 0; 273 int spk_mask = 0; 274 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE]; 275 276 /* 277 * CA defaults to 0 for basic stereo audio 278 */ 279 if (channels <= 2) 280 return 0; 281 282 /* 283 * expand ELD's speaker allocation mask 284 * 285 * ELD tells the speaker mask in a compact(paired) form, 286 * expand ELD's notions to match the ones used by Audio InfoFrame. 287 */ 288 for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { 289 if (spk_alloc & (1 << i)) 290 spk_mask |= eld_speaker_allocation_bits[i]; 291 } 292 293 /* search for the first working match in the CA table */ 294 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { 295 if (channels == channel_allocations[i].channels && 296 (spk_mask & channel_allocations[i].spk_mask) == 297 channel_allocations[i].spk_mask) { 298 ca = channel_allocations[i].ca_index; 299 break; 300 } 301 } 302 303 if (!ca) { 304 /* 305 * if there was no match, select the regular ALSA channel 306 * allocation with the matching number of channels 307 */ 308 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { 309 if (channels == channel_allocations[i].channels) { 310 ca = channel_allocations[i].ca_index; 311 break; 312 } 313 } 314 } 315 316 snd_hdac_print_channel_allocation(spk_alloc, buf, sizeof(buf)); 317 dev_dbg(&codec->dev, "HDMI: select CA 0x%x for %d-channel allocation: %s\n", 318 ca, channels, buf); 319 320 return ca; 321 } 322 323 static void hdmi_debug_channel_mapping(struct hdac_chmap *chmap, 324 hda_nid_t pin_nid) 325 { 326 #ifdef CONFIG_SND_DEBUG_VERBOSE 327 int i; 328 int channel; 329 330 for (i = 0; i < 8; i++) { 331 channel = chmap->ops.pin_get_slot_channel( 332 chmap->hdac, pin_nid, i); 333 dev_dbg(&chmap->hdac->dev, "HDMI: ASP channel %d => slot %d\n", 334 channel, i); 335 } 336 #endif 337 } 338 339 static void hdmi_std_setup_channel_mapping(struct hdac_chmap *chmap, 340 hda_nid_t pin_nid, 341 bool non_pcm, 342 int ca) 343 { 344 struct hdac_cea_channel_speaker_allocation *ch_alloc; 345 int i; 346 int err; 347 int order; 348 int non_pcm_mapping[8]; 349 350 order = get_channel_allocation_order(ca); 351 ch_alloc = &channel_allocations[order]; 352 353 if (hdmi_channel_mapping[ca][1] == 0) { 354 int hdmi_slot = 0; 355 /* fill actual channel mappings in ALSA channel (i) order */ 356 for (i = 0; i < ch_alloc->channels && hdmi_slot < 8; i++) { 357 while (!ch_alloc->speakers[7 - hdmi_slot]) { 358 /* skip zero slots */ 359 if (++hdmi_slot >= 8) 360 goto out; 361 } 362 363 hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++; 364 } 365 out: 366 /* fill the rest of the slots with ALSA channel 0xf */ 367 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) 368 if (!ch_alloc->speakers[7 - hdmi_slot]) 369 hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot; 370 } 371 372 if (non_pcm) { 373 for (i = 0; i < ch_alloc->channels; i++) 374 non_pcm_mapping[i] = (i << 4) | i; 375 for (; i < 8; i++) 376 non_pcm_mapping[i] = (0xf << 4) | i; 377 } 378 379 for (i = 0; i < 8; i++) { 380 int slotsetup = non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i]; 381 int hdmi_slot = slotsetup & 0x0f; 382 int channel = (slotsetup & 0xf0) >> 4; 383 384 err = chmap->ops.pin_set_slot_channel(chmap->hdac, 385 pin_nid, hdmi_slot, channel); 386 if (err) { 387 dev_dbg(&chmap->hdac->dev, "HDMI: channel mapping failed\n"); 388 break; 389 } 390 } 391 } 392 393 struct channel_map_table { 394 unsigned char map; /* ALSA API channel map position */ 395 int spk_mask; /* speaker position bit mask */ 396 }; 397 398 static struct channel_map_table map_tables[] = { 399 { SNDRV_CHMAP_FL, FL }, 400 { SNDRV_CHMAP_FR, FR }, 401 { SNDRV_CHMAP_RL, RL }, 402 { SNDRV_CHMAP_RR, RR }, 403 { SNDRV_CHMAP_LFE, LFE }, 404 { SNDRV_CHMAP_FC, FC }, 405 { SNDRV_CHMAP_RLC, RLC }, 406 { SNDRV_CHMAP_RRC, RRC }, 407 { SNDRV_CHMAP_RC, RC }, 408 { SNDRV_CHMAP_FLC, FLC }, 409 { SNDRV_CHMAP_FRC, FRC }, 410 { SNDRV_CHMAP_TFL, FLH }, 411 { SNDRV_CHMAP_TFR, FRH }, 412 { SNDRV_CHMAP_FLW, FLW }, 413 { SNDRV_CHMAP_FRW, FRW }, 414 { SNDRV_CHMAP_TC, TC }, 415 { SNDRV_CHMAP_TFC, FCH }, 416 {} /* terminator */ 417 }; 418 419 /* from ALSA API channel position to speaker bit mask */ 420 int snd_hdac_chmap_to_spk_mask(unsigned char c) 421 { 422 struct channel_map_table *t = map_tables; 423 424 for (; t->map; t++) { 425 if (t->map == c) 426 return t->spk_mask; 427 } 428 return 0; 429 } 430 EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask); 431 432 /* from ALSA API channel position to CEA slot */ 433 static int to_cea_slot(int ordered_ca, unsigned char pos) 434 { 435 int mask = snd_hdac_chmap_to_spk_mask(pos); 436 int i; 437 438 /* Add sanity check to pass klockwork check. 439 * This should never happen. 440 */ 441 if (ordered_ca >= ARRAY_SIZE(channel_allocations)) 442 return -1; 443 444 if (mask) { 445 for (i = 0; i < 8; i++) { 446 if (channel_allocations[ordered_ca].speakers[7 - i] == mask) 447 return i; 448 } 449 } 450 451 return -1; 452 } 453 454 /* from speaker bit mask to ALSA API channel position */ 455 int snd_hdac_spk_to_chmap(int spk) 456 { 457 struct channel_map_table *t = map_tables; 458 459 for (; t->map; t++) { 460 if (t->spk_mask == spk) 461 return t->map; 462 } 463 return 0; 464 } 465 EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap); 466 467 /* from CEA slot to ALSA API channel position */ 468 static int from_cea_slot(int ordered_ca, unsigned char slot) 469 { 470 int mask; 471 472 /* Add sanity check to pass klockwork check. 473 * This should never happen. 474 */ 475 if (slot >= 8) 476 return 0; 477 478 mask = channel_allocations[ordered_ca].speakers[7 - slot]; 479 480 return snd_hdac_spk_to_chmap(mask); 481 } 482 483 /* get the CA index corresponding to the given ALSA API channel map */ 484 static int hdmi_manual_channel_allocation(int chs, unsigned char *map) 485 { 486 int i, spks = 0, spk_mask = 0; 487 488 for (i = 0; i < chs; i++) { 489 int mask = snd_hdac_chmap_to_spk_mask(map[i]); 490 491 if (mask) { 492 spk_mask |= mask; 493 spks++; 494 } 495 } 496 497 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { 498 if ((chs == channel_allocations[i].channels || 499 spks == channel_allocations[i].channels) && 500 (spk_mask & channel_allocations[i].spk_mask) == 501 channel_allocations[i].spk_mask) 502 return channel_allocations[i].ca_index; 503 } 504 return -1; 505 } 506 507 /* set up the channel slots for the given ALSA API channel map */ 508 static int hdmi_manual_setup_channel_mapping(struct hdac_chmap *chmap, 509 hda_nid_t pin_nid, 510 int chs, unsigned char *map, 511 int ca) 512 { 513 int ordered_ca = get_channel_allocation_order(ca); 514 int alsa_pos, hdmi_slot; 515 int assignments[8] = {[0 ... 7] = 0xf}; 516 517 for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) { 518 519 hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]); 520 521 if (hdmi_slot < 0) 522 continue; /* unassigned channel */ 523 524 assignments[hdmi_slot] = alsa_pos; 525 } 526 527 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) { 528 int err; 529 530 err = chmap->ops.pin_set_slot_channel(chmap->hdac, 531 pin_nid, hdmi_slot, assignments[hdmi_slot]); 532 if (err) 533 return -EINVAL; 534 } 535 return 0; 536 } 537 538 /* store ALSA API channel map from the current default map */ 539 static void hdmi_setup_fake_chmap(unsigned char *map, int ca) 540 { 541 int i; 542 int ordered_ca = get_channel_allocation_order(ca); 543 544 for (i = 0; i < 8; i++) { 545 if (ordered_ca < ARRAY_SIZE(channel_allocations) && 546 i < channel_allocations[ordered_ca].channels) 547 map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f); 548 else 549 map[i] = 0; 550 } 551 } 552 553 void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap, 554 hda_nid_t pin_nid, bool non_pcm, int ca, 555 int channels, unsigned char *map, 556 bool chmap_set) 557 { 558 if (!non_pcm && chmap_set) { 559 hdmi_manual_setup_channel_mapping(chmap, pin_nid, 560 channels, map, ca); 561 } else { 562 hdmi_std_setup_channel_mapping(chmap, pin_nid, non_pcm, ca); 563 hdmi_setup_fake_chmap(map, ca); 564 } 565 566 hdmi_debug_channel_mapping(chmap, pin_nid); 567 } 568 EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping); 569 570 int snd_hdac_get_active_channels(int ca) 571 { 572 int ordered_ca = get_channel_allocation_order(ca); 573 574 /* Add sanity check to pass klockwork check. 575 * This should never happen. 576 */ 577 if (ordered_ca >= ARRAY_SIZE(channel_allocations)) 578 ordered_ca = 0; 579 580 return channel_allocations[ordered_ca].channels; 581 } 582 EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels); 583 584 struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca) 585 { 586 return &channel_allocations[get_channel_allocation_order(ca)]; 587 } 588 EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca); 589 590 int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc, 591 int channels, bool chmap_set, bool non_pcm, unsigned char *map) 592 { 593 int ca; 594 595 if (!non_pcm && chmap_set) 596 ca = hdmi_manual_channel_allocation(channels, map); 597 else 598 ca = hdmi_channel_allocation_spk_alloc_blk(hdac, 599 spk_alloc, channels); 600 601 if (ca < 0) 602 ca = 0; 603 604 return ca; 605 } 606 EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation); 607 608 /* 609 * ALSA API channel-map control callbacks 610 */ 611 static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol, 612 struct snd_ctl_elem_info *uinfo) 613 { 614 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 615 struct hdac_chmap *chmap = info->private_data; 616 617 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 618 uinfo->count = chmap->channels_max; 619 uinfo->value.integer.min = 0; 620 uinfo->value.integer.max = SNDRV_CHMAP_LAST; 621 return 0; 622 } 623 624 static int hdmi_chmap_cea_alloc_validate_get_type(struct hdac_chmap *chmap, 625 struct hdac_cea_channel_speaker_allocation *cap, int channels) 626 { 627 /* If the speaker allocation matches the channel count, it is OK.*/ 628 if (cap->channels != channels) 629 return -1; 630 631 /* all channels are remappable freely */ 632 return SNDRV_CTL_TLVT_CHMAP_VAR; 633 } 634 635 static void hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap *hchmap, 636 struct hdac_cea_channel_speaker_allocation *cap, 637 unsigned int *chmap, int channels) 638 { 639 int count = 0; 640 int c; 641 642 for (c = 7; c >= 0; c--) { 643 int spk = cap->speakers[c]; 644 645 if (!spk) 646 continue; 647 648 chmap[count++] = snd_hdac_spk_to_chmap(spk); 649 } 650 651 WARN_ON(count != channels); 652 } 653 654 static int spk_mask_from_spk_alloc(int spk_alloc) 655 { 656 int i; 657 int spk_mask = eld_speaker_allocation_bits[0]; 658 659 for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { 660 if (spk_alloc & (1 << i)) 661 spk_mask |= eld_speaker_allocation_bits[i]; 662 } 663 664 return spk_mask; 665 } 666 667 static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, 668 unsigned int size, unsigned int __user *tlv) 669 { 670 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 671 struct hdac_chmap *chmap = info->private_data; 672 int pcm_idx = kcontrol->private_value; 673 unsigned int __user *dst; 674 int chs, count = 0; 675 unsigned long max_chs; 676 int type; 677 int spk_alloc, spk_mask; 678 679 if (size < 8) 680 return -ENOMEM; 681 if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) 682 return -EFAULT; 683 size -= 8; 684 dst = tlv + 2; 685 686 spk_alloc = chmap->ops.get_spk_alloc(chmap->hdac, pcm_idx); 687 spk_mask = spk_mask_from_spk_alloc(spk_alloc); 688 689 max_chs = hweight_long(spk_mask); 690 691 for (chs = 2; chs <= max_chs; chs++) { 692 int i; 693 struct hdac_cea_channel_speaker_allocation *cap; 694 695 cap = channel_allocations; 696 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) { 697 int chs_bytes = chs * 4; 698 unsigned int tlv_chmap[8]; 699 700 if (cap->channels != chs) 701 continue; 702 703 if (!(cap->spk_mask == (spk_mask & cap->spk_mask))) 704 continue; 705 706 type = chmap->ops.chmap_cea_alloc_validate_get_type( 707 chmap, cap, chs); 708 if (type < 0) 709 return -ENODEV; 710 if (size < 8) 711 return -ENOMEM; 712 713 if (put_user(type, dst) || 714 put_user(chs_bytes, dst + 1)) 715 return -EFAULT; 716 717 dst += 2; 718 size -= 8; 719 count += 8; 720 721 if (size < chs_bytes) 722 return -ENOMEM; 723 724 size -= chs_bytes; 725 count += chs_bytes; 726 chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap, 727 tlv_chmap, chs); 728 729 if (copy_to_user(dst, tlv_chmap, chs_bytes)) 730 return -EFAULT; 731 dst += chs; 732 } 733 } 734 735 if (put_user(count, tlv + 1)) 736 return -EFAULT; 737 738 return 0; 739 } 740 741 static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol, 742 struct snd_ctl_elem_value *ucontrol) 743 { 744 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 745 struct hdac_chmap *chmap = info->private_data; 746 int pcm_idx = kcontrol->private_value; 747 unsigned char pcm_chmap[8]; 748 int i; 749 750 memset(pcm_chmap, 0, sizeof(pcm_chmap)); 751 chmap->ops.get_chmap(chmap->hdac, pcm_idx, pcm_chmap); 752 753 for (i = 0; i < ARRAY_SIZE(pcm_chmap); i++) 754 ucontrol->value.integer.value[i] = pcm_chmap[i]; 755 756 return 0; 757 } 758 759 /* a simple sanity check for input values to chmap kcontrol */ 760 static int chmap_value_check(struct hdac_chmap *hchmap, 761 const struct snd_ctl_elem_value *ucontrol) 762 { 763 int i; 764 765 for (i = 0; i < hchmap->channels_max; i++) { 766 if (ucontrol->value.integer.value[i] < 0 || 767 ucontrol->value.integer.value[i] > SNDRV_CHMAP_LAST) 768 return -EINVAL; 769 } 770 return 0; 771 } 772 773 static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol, 774 struct snd_ctl_elem_value *ucontrol) 775 { 776 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 777 struct hdac_chmap *hchmap = info->private_data; 778 int pcm_idx = kcontrol->private_value; 779 unsigned int ctl_idx; 780 struct snd_pcm_substream *substream; 781 unsigned char chmap[8], per_pin_chmap[8]; 782 int i, err, ca, prepared = 0; 783 784 err = chmap_value_check(hchmap, ucontrol); 785 if (err < 0) 786 return err; 787 788 /* No monitor is connected in dyn_pcm_assign. 789 * It's invalid to setup the chmap 790 */ 791 if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx)) 792 return 0; 793 794 ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); 795 substream = snd_pcm_chmap_substream(info, ctl_idx); 796 if (!substream || !substream->runtime) 797 return 0; /* just for avoiding error from alsactl restore */ 798 switch (substream->runtime->state) { 799 case SNDRV_PCM_STATE_OPEN: 800 case SNDRV_PCM_STATE_SETUP: 801 break; 802 case SNDRV_PCM_STATE_PREPARED: 803 prepared = 1; 804 break; 805 default: 806 return -EBUSY; 807 } 808 memset(chmap, 0, sizeof(chmap)); 809 for (i = 0; i < ARRAY_SIZE(chmap); i++) 810 chmap[i] = ucontrol->value.integer.value[i]; 811 812 hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap); 813 if (!memcmp(chmap, per_pin_chmap, sizeof(chmap))) 814 return 0; 815 ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap); 816 if (ca < 0) 817 return -EINVAL; 818 if (hchmap->ops.chmap_validate) { 819 err = hchmap->ops.chmap_validate(hchmap, ca, 820 ARRAY_SIZE(chmap), chmap); 821 if (err) 822 return err; 823 } 824 825 hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared); 826 827 return 0; 828 } 829 830 static const struct hdac_chmap_ops chmap_ops = { 831 .chmap_cea_alloc_validate_get_type = hdmi_chmap_cea_alloc_validate_get_type, 832 .cea_alloc_to_tlv_chmap = hdmi_cea_alloc_to_tlv_chmap, 833 .pin_get_slot_channel = hdmi_pin_get_slot_channel, 834 .pin_set_slot_channel = hdmi_pin_set_slot_channel, 835 .set_channel_count = hdmi_set_channel_count, 836 }; 837 838 void snd_hdac_register_chmap_ops(struct hdac_device *hdac, 839 struct hdac_chmap *chmap) 840 { 841 chmap->ops = chmap_ops; 842 chmap->hdac = hdac; 843 init_channel_allocations(); 844 } 845 EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops); 846 847 int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx, 848 struct hdac_chmap *hchmap) 849 { 850 struct snd_pcm_chmap *chmap; 851 struct snd_kcontrol *kctl; 852 int err, i; 853 854 err = snd_pcm_add_chmap_ctls(pcm, 855 SNDRV_PCM_STREAM_PLAYBACK, 856 NULL, 0, pcm_idx, &chmap); 857 if (err < 0) 858 return err; 859 /* override handlers */ 860 chmap->private_data = hchmap; 861 kctl = chmap->kctl; 862 for (i = 0; i < kctl->count; i++) 863 kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE; 864 kctl->info = hdmi_chmap_ctl_info; 865 kctl->get = hdmi_chmap_ctl_get; 866 kctl->put = hdmi_chmap_ctl_put; 867 kctl->tlv.c = hdmi_chmap_ctl_tlv; 868 869 return 0; 870 } 871 EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls); 872