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 hdmi_pin_set_slot_channel(struct hdac_device * codec,hda_nid_t pin_nid,int asp_slot,int channel)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 hdmi_pin_get_slot_channel(struct hdac_device * codec,hda_nid_t pin_nid,int asp_slot)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 hdmi_get_channel_count(struct hdac_device * codec,hda_nid_t cvt_nid)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 hdmi_set_channel_count(struct hdac_device * codec,hda_nid_t cvt_nid,int chs)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 */ init_channel_allocations(void)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 get_channel_allocation_order(int ca)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 snd_hdac_print_channel_allocation(int spk_alloc,char * buf,int buflen)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 */ hdmi_channel_allocation_spk_alloc_blk(struct hdac_device * codec,int spk_alloc,int channels)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 hdmi_debug_channel_mapping(struct hdac_chmap * chmap,hda_nid_t pin_nid)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 hdmi_std_setup_channel_mapping(struct hdac_chmap * chmap,hda_nid_t pin_nid,bool non_pcm,int ca)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; i++) { 357 while (!WARN_ON(hdmi_slot >= 8) && 358 !ch_alloc->speakers[7 - hdmi_slot]) 359 hdmi_slot++; /* skip zero slots */ 360 361 hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++; 362 } 363 /* fill the rest of the slots with ALSA channel 0xf */ 364 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) 365 if (!ch_alloc->speakers[7 - hdmi_slot]) 366 hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot; 367 } 368 369 if (non_pcm) { 370 for (i = 0; i < ch_alloc->channels; i++) 371 non_pcm_mapping[i] = (i << 4) | i; 372 for (; i < 8; i++) 373 non_pcm_mapping[i] = (0xf << 4) | i; 374 } 375 376 for (i = 0; i < 8; i++) { 377 int slotsetup = non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i]; 378 int hdmi_slot = slotsetup & 0x0f; 379 int channel = (slotsetup & 0xf0) >> 4; 380 381 err = chmap->ops.pin_set_slot_channel(chmap->hdac, 382 pin_nid, hdmi_slot, channel); 383 if (err) { 384 dev_dbg(&chmap->hdac->dev, "HDMI: channel mapping failed\n"); 385 break; 386 } 387 } 388 } 389 390 struct channel_map_table { 391 unsigned char map; /* ALSA API channel map position */ 392 int spk_mask; /* speaker position bit mask */ 393 }; 394 395 static struct channel_map_table map_tables[] = { 396 { SNDRV_CHMAP_FL, FL }, 397 { SNDRV_CHMAP_FR, FR }, 398 { SNDRV_CHMAP_RL, RL }, 399 { SNDRV_CHMAP_RR, RR }, 400 { SNDRV_CHMAP_LFE, LFE }, 401 { SNDRV_CHMAP_FC, FC }, 402 { SNDRV_CHMAP_RLC, RLC }, 403 { SNDRV_CHMAP_RRC, RRC }, 404 { SNDRV_CHMAP_RC, RC }, 405 { SNDRV_CHMAP_FLC, FLC }, 406 { SNDRV_CHMAP_FRC, FRC }, 407 { SNDRV_CHMAP_TFL, FLH }, 408 { SNDRV_CHMAP_TFR, FRH }, 409 { SNDRV_CHMAP_FLW, FLW }, 410 { SNDRV_CHMAP_FRW, FRW }, 411 { SNDRV_CHMAP_TC, TC }, 412 { SNDRV_CHMAP_TFC, FCH }, 413 {} /* terminator */ 414 }; 415 416 /* from ALSA API channel position to speaker bit mask */ snd_hdac_chmap_to_spk_mask(unsigned char c)417 int snd_hdac_chmap_to_spk_mask(unsigned char c) 418 { 419 struct channel_map_table *t = map_tables; 420 421 for (; t->map; t++) { 422 if (t->map == c) 423 return t->spk_mask; 424 } 425 return 0; 426 } 427 EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask); 428 429 /* from ALSA API channel position to CEA slot */ to_cea_slot(int ordered_ca,unsigned char pos)430 static int to_cea_slot(int ordered_ca, unsigned char pos) 431 { 432 int mask = snd_hdac_chmap_to_spk_mask(pos); 433 int i; 434 435 /* Add sanity check to pass klockwork check. 436 * This should never happen. 437 */ 438 if (ordered_ca >= ARRAY_SIZE(channel_allocations)) 439 return -1; 440 441 if (mask) { 442 for (i = 0; i < 8; i++) { 443 if (channel_allocations[ordered_ca].speakers[7 - i] == mask) 444 return i; 445 } 446 } 447 448 return -1; 449 } 450 451 /* from speaker bit mask to ALSA API channel position */ snd_hdac_spk_to_chmap(int spk)452 int snd_hdac_spk_to_chmap(int spk) 453 { 454 struct channel_map_table *t = map_tables; 455 456 for (; t->map; t++) { 457 if (t->spk_mask == spk) 458 return t->map; 459 } 460 return 0; 461 } 462 EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap); 463 464 /* from CEA slot to ALSA API channel position */ from_cea_slot(int ordered_ca,unsigned char slot)465 static int from_cea_slot(int ordered_ca, unsigned char slot) 466 { 467 int mask; 468 469 /* Add sanity check to pass klockwork check. 470 * This should never happen. 471 */ 472 if (slot >= 8) 473 return 0; 474 475 mask = channel_allocations[ordered_ca].speakers[7 - slot]; 476 477 return snd_hdac_spk_to_chmap(mask); 478 } 479 480 /* get the CA index corresponding to the given ALSA API channel map */ hdmi_manual_channel_allocation(int chs,unsigned char * map)481 static int hdmi_manual_channel_allocation(int chs, unsigned char *map) 482 { 483 int i, spks = 0, spk_mask = 0; 484 485 for (i = 0; i < chs; i++) { 486 int mask = snd_hdac_chmap_to_spk_mask(map[i]); 487 488 if (mask) { 489 spk_mask |= mask; 490 spks++; 491 } 492 } 493 494 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { 495 if ((chs == channel_allocations[i].channels || 496 spks == channel_allocations[i].channels) && 497 (spk_mask & channel_allocations[i].spk_mask) == 498 channel_allocations[i].spk_mask) 499 return channel_allocations[i].ca_index; 500 } 501 return -1; 502 } 503 504 /* set up the channel slots for the given ALSA API channel map */ hdmi_manual_setup_channel_mapping(struct hdac_chmap * chmap,hda_nid_t pin_nid,int chs,unsigned char * map,int ca)505 static int hdmi_manual_setup_channel_mapping(struct hdac_chmap *chmap, 506 hda_nid_t pin_nid, 507 int chs, unsigned char *map, 508 int ca) 509 { 510 int ordered_ca = get_channel_allocation_order(ca); 511 int alsa_pos, hdmi_slot; 512 int assignments[8] = {[0 ... 7] = 0xf}; 513 514 for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) { 515 516 hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]); 517 518 if (hdmi_slot < 0) 519 continue; /* unassigned channel */ 520 521 assignments[hdmi_slot] = alsa_pos; 522 } 523 524 for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) { 525 int err; 526 527 err = chmap->ops.pin_set_slot_channel(chmap->hdac, 528 pin_nid, hdmi_slot, assignments[hdmi_slot]); 529 if (err) 530 return -EINVAL; 531 } 532 return 0; 533 } 534 535 /* store ALSA API channel map from the current default map */ hdmi_setup_fake_chmap(unsigned char * map,int ca)536 static void hdmi_setup_fake_chmap(unsigned char *map, int ca) 537 { 538 int i; 539 int ordered_ca = get_channel_allocation_order(ca); 540 541 for (i = 0; i < 8; i++) { 542 if (ordered_ca < ARRAY_SIZE(channel_allocations) && 543 i < channel_allocations[ordered_ca].channels) 544 map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f); 545 else 546 map[i] = 0; 547 } 548 } 549 snd_hdac_setup_channel_mapping(struct hdac_chmap * chmap,hda_nid_t pin_nid,bool non_pcm,int ca,int channels,unsigned char * map,bool chmap_set)550 void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap, 551 hda_nid_t pin_nid, bool non_pcm, int ca, 552 int channels, unsigned char *map, 553 bool chmap_set) 554 { 555 if (!non_pcm && chmap_set) { 556 hdmi_manual_setup_channel_mapping(chmap, pin_nid, 557 channels, map, ca); 558 } else { 559 hdmi_std_setup_channel_mapping(chmap, pin_nid, non_pcm, ca); 560 hdmi_setup_fake_chmap(map, ca); 561 } 562 563 hdmi_debug_channel_mapping(chmap, pin_nid); 564 } 565 EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping); 566 snd_hdac_get_active_channels(int ca)567 int snd_hdac_get_active_channels(int ca) 568 { 569 int ordered_ca = get_channel_allocation_order(ca); 570 571 /* Add sanity check to pass klockwork check. 572 * This should never happen. 573 */ 574 if (ordered_ca >= ARRAY_SIZE(channel_allocations)) 575 ordered_ca = 0; 576 577 return channel_allocations[ordered_ca].channels; 578 } 579 EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels); 580 snd_hdac_get_ch_alloc_from_ca(int ca)581 struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca) 582 { 583 return &channel_allocations[get_channel_allocation_order(ca)]; 584 } 585 EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca); 586 snd_hdac_channel_allocation(struct hdac_device * hdac,int spk_alloc,int channels,bool chmap_set,bool non_pcm,unsigned char * map)587 int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc, 588 int channels, bool chmap_set, bool non_pcm, unsigned char *map) 589 { 590 int ca; 591 592 if (!non_pcm && chmap_set) 593 ca = hdmi_manual_channel_allocation(channels, map); 594 else 595 ca = hdmi_channel_allocation_spk_alloc_blk(hdac, 596 spk_alloc, channels); 597 598 if (ca < 0) 599 ca = 0; 600 601 return ca; 602 } 603 EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation); 604 605 /* 606 * ALSA API channel-map control callbacks 607 */ hdmi_chmap_ctl_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)608 static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol, 609 struct snd_ctl_elem_info *uinfo) 610 { 611 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 612 struct hdac_chmap *chmap = info->private_data; 613 614 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 615 uinfo->count = chmap->channels_max; 616 uinfo->value.integer.min = 0; 617 uinfo->value.integer.max = SNDRV_CHMAP_LAST; 618 return 0; 619 } 620 hdmi_chmap_cea_alloc_validate_get_type(struct hdac_chmap * chmap,struct hdac_cea_channel_speaker_allocation * cap,int channels)621 static int hdmi_chmap_cea_alloc_validate_get_type(struct hdac_chmap *chmap, 622 struct hdac_cea_channel_speaker_allocation *cap, int channels) 623 { 624 /* If the speaker allocation matches the channel count, it is OK.*/ 625 if (cap->channels != channels) 626 return -1; 627 628 /* all channels are remappable freely */ 629 return SNDRV_CTL_TLVT_CHMAP_VAR; 630 } 631 hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap * hchmap,struct hdac_cea_channel_speaker_allocation * cap,unsigned int * chmap,int channels)632 static void hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap *hchmap, 633 struct hdac_cea_channel_speaker_allocation *cap, 634 unsigned int *chmap, int channels) 635 { 636 int count = 0; 637 int c; 638 639 for (c = 7; c >= 0; c--) { 640 int spk = cap->speakers[c]; 641 642 if (!spk) 643 continue; 644 645 chmap[count++] = snd_hdac_spk_to_chmap(spk); 646 } 647 648 WARN_ON(count != channels); 649 } 650 spk_mask_from_spk_alloc(int spk_alloc)651 static int spk_mask_from_spk_alloc(int spk_alloc) 652 { 653 int i; 654 int spk_mask = eld_speaker_allocation_bits[0]; 655 656 for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { 657 if (spk_alloc & (1 << i)) 658 spk_mask |= eld_speaker_allocation_bits[i]; 659 } 660 661 return spk_mask; 662 } 663 hdmi_chmap_ctl_tlv(struct snd_kcontrol * kcontrol,int op_flag,unsigned int size,unsigned int __user * tlv)664 static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, 665 unsigned int size, unsigned int __user *tlv) 666 { 667 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 668 struct hdac_chmap *chmap = info->private_data; 669 int pcm_idx = kcontrol->private_value; 670 unsigned int __user *dst; 671 int chs, count = 0; 672 unsigned long max_chs; 673 int type; 674 int spk_alloc, spk_mask; 675 676 if (size < 8) 677 return -ENOMEM; 678 if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) 679 return -EFAULT; 680 size -= 8; 681 dst = tlv + 2; 682 683 spk_alloc = chmap->ops.get_spk_alloc(chmap->hdac, pcm_idx); 684 spk_mask = spk_mask_from_spk_alloc(spk_alloc); 685 686 max_chs = hweight_long(spk_mask); 687 688 for (chs = 2; chs <= max_chs; chs++) { 689 int i; 690 struct hdac_cea_channel_speaker_allocation *cap; 691 692 cap = channel_allocations; 693 for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) { 694 int chs_bytes = chs * 4; 695 unsigned int tlv_chmap[8]; 696 697 if (cap->channels != chs) 698 continue; 699 700 if (!(cap->spk_mask == (spk_mask & cap->spk_mask))) 701 continue; 702 703 type = chmap->ops.chmap_cea_alloc_validate_get_type( 704 chmap, cap, chs); 705 if (type < 0) 706 return -ENODEV; 707 if (size < 8) 708 return -ENOMEM; 709 710 if (put_user(type, dst) || 711 put_user(chs_bytes, dst + 1)) 712 return -EFAULT; 713 714 dst += 2; 715 size -= 8; 716 count += 8; 717 718 if (size < chs_bytes) 719 return -ENOMEM; 720 721 size -= chs_bytes; 722 count += chs_bytes; 723 chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap, 724 tlv_chmap, chs); 725 726 if (copy_to_user(dst, tlv_chmap, chs_bytes)) 727 return -EFAULT; 728 dst += chs; 729 } 730 } 731 732 if (put_user(count, tlv + 1)) 733 return -EFAULT; 734 735 return 0; 736 } 737 hdmi_chmap_ctl_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)738 static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol, 739 struct snd_ctl_elem_value *ucontrol) 740 { 741 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 742 struct hdac_chmap *chmap = info->private_data; 743 int pcm_idx = kcontrol->private_value; 744 unsigned char pcm_chmap[8]; 745 int i; 746 747 memset(pcm_chmap, 0, sizeof(pcm_chmap)); 748 chmap->ops.get_chmap(chmap->hdac, pcm_idx, pcm_chmap); 749 750 for (i = 0; i < ARRAY_SIZE(pcm_chmap); i++) 751 ucontrol->value.integer.value[i] = pcm_chmap[i]; 752 753 return 0; 754 } 755 756 /* a simple sanity check for input values to chmap kcontrol */ chmap_value_check(struct hdac_chmap * hchmap,const struct snd_ctl_elem_value * ucontrol)757 static int chmap_value_check(struct hdac_chmap *hchmap, 758 const struct snd_ctl_elem_value *ucontrol) 759 { 760 int i; 761 762 for (i = 0; i < hchmap->channels_max; i++) { 763 if (ucontrol->value.integer.value[i] < 0 || 764 ucontrol->value.integer.value[i] > SNDRV_CHMAP_LAST) 765 return -EINVAL; 766 } 767 return 0; 768 } 769 hdmi_chmap_ctl_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)770 static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol, 771 struct snd_ctl_elem_value *ucontrol) 772 { 773 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 774 struct hdac_chmap *hchmap = info->private_data; 775 int pcm_idx = kcontrol->private_value; 776 unsigned int ctl_idx; 777 struct snd_pcm_substream *substream; 778 unsigned char chmap[8], per_pin_chmap[8]; 779 int i, err, ca, prepared = 0; 780 781 err = chmap_value_check(hchmap, ucontrol); 782 if (err < 0) 783 return err; 784 785 /* No monitor is connected in dyn_pcm_assign. 786 * It's invalid to setup the chmap 787 */ 788 if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx)) 789 return 0; 790 791 ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); 792 substream = snd_pcm_chmap_substream(info, ctl_idx); 793 if (!substream || !substream->runtime) 794 return 0; /* just for avoiding error from alsactl restore */ 795 switch (substream->runtime->state) { 796 case SNDRV_PCM_STATE_OPEN: 797 case SNDRV_PCM_STATE_SETUP: 798 break; 799 case SNDRV_PCM_STATE_PREPARED: 800 prepared = 1; 801 break; 802 default: 803 return -EBUSY; 804 } 805 memset(chmap, 0, sizeof(chmap)); 806 for (i = 0; i < ARRAY_SIZE(chmap); i++) 807 chmap[i] = ucontrol->value.integer.value[i]; 808 809 hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap); 810 if (!memcmp(chmap, per_pin_chmap, sizeof(chmap))) 811 return 0; 812 ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap); 813 if (ca < 0) 814 return -EINVAL; 815 if (hchmap->ops.chmap_validate) { 816 err = hchmap->ops.chmap_validate(hchmap, ca, 817 ARRAY_SIZE(chmap), chmap); 818 if (err) 819 return err; 820 } 821 822 hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared); 823 824 return 0; 825 } 826 827 static const struct hdac_chmap_ops chmap_ops = { 828 .chmap_cea_alloc_validate_get_type = hdmi_chmap_cea_alloc_validate_get_type, 829 .cea_alloc_to_tlv_chmap = hdmi_cea_alloc_to_tlv_chmap, 830 .pin_get_slot_channel = hdmi_pin_get_slot_channel, 831 .pin_set_slot_channel = hdmi_pin_set_slot_channel, 832 .set_channel_count = hdmi_set_channel_count, 833 }; 834 snd_hdac_register_chmap_ops(struct hdac_device * hdac,struct hdac_chmap * chmap)835 void snd_hdac_register_chmap_ops(struct hdac_device *hdac, 836 struct hdac_chmap *chmap) 837 { 838 chmap->ops = chmap_ops; 839 chmap->hdac = hdac; 840 init_channel_allocations(); 841 } 842 EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops); 843 snd_hdac_add_chmap_ctls(struct snd_pcm * pcm,int pcm_idx,struct hdac_chmap * hchmap)844 int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx, 845 struct hdac_chmap *hchmap) 846 { 847 struct snd_pcm_chmap *chmap; 848 struct snd_kcontrol *kctl; 849 int err, i; 850 851 err = snd_pcm_add_chmap_ctls(pcm, 852 SNDRV_PCM_STREAM_PLAYBACK, 853 NULL, 0, pcm_idx, &chmap); 854 if (err < 0) 855 return err; 856 /* override handlers */ 857 chmap->private_data = hchmap; 858 kctl = chmap->kctl; 859 for (i = 0; i < kctl->count; i++) 860 kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE; 861 kctl->info = hdmi_chmap_ctl_info; 862 kctl->get = hdmi_chmap_ctl_get; 863 kctl->put = hdmi_chmap_ctl_put; 864 kctl->tlv.c = hdmi_chmap_ctl_tlv; 865 866 return 0; 867 } 868 EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls); 869