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