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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 | /* * Copyright © 2008 Keith Packard * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ #ifndef _DRM_DP_HELPER_H_ #define _DRM_DP_HELPER_H_ #include <linux/types.h> #include <linux/i2c.h> #include <linux/delay.h> /* * Unless otherwise noted, all values are from the DP 1.1a spec. Note that * DP and DPCD versions are independent. Differences from 1.0 are not noted, * 1.0 devices basically don't exist in the wild. * * Abbreviations, in chronological order: * * eDP: Embedded DisplayPort version 1 * DPI: DisplayPort Interoperability Guideline v1.1a * 1.2: DisplayPort 1.2 * MST: Multistream Transport - part of DP 1.2a * * 1.2 formally includes both eDP and DPI definitions. */ #define DP_AUX_MAX_PAYLOAD_BYTES 16 #define DP_AUX_I2C_WRITE 0x0 #define DP_AUX_I2C_READ 0x1 #define DP_AUX_I2C_WRITE_STATUS_UPDATE 0x2 #define DP_AUX_I2C_MOT 0x4 #define DP_AUX_NATIVE_WRITE 0x8 #define DP_AUX_NATIVE_READ 0x9 #define DP_AUX_NATIVE_REPLY_ACK (0x0 << 0) #define DP_AUX_NATIVE_REPLY_NACK (0x1 << 0) #define DP_AUX_NATIVE_REPLY_DEFER (0x2 << 0) #define DP_AUX_NATIVE_REPLY_MASK (0x3 << 0) #define DP_AUX_I2C_REPLY_ACK (0x0 << 2) #define DP_AUX_I2C_REPLY_NACK (0x1 << 2) #define DP_AUX_I2C_REPLY_DEFER (0x2 << 2) #define DP_AUX_I2C_REPLY_MASK (0x3 << 2) /* AUX CH addresses */ /* DPCD */ #define DP_DPCD_REV 0x000 #define DP_MAX_LINK_RATE 0x001 #define DP_MAX_LANE_COUNT 0x002 # define DP_MAX_LANE_COUNT_MASK 0x1f # define DP_TPS3_SUPPORTED (1 << 6) /* 1.2 */ # define DP_ENHANCED_FRAME_CAP (1 << 7) #define DP_MAX_DOWNSPREAD 0x003 # define DP_MAX_DOWNSPREAD_0_5 (1 << 0) # define DP_NO_AUX_HANDSHAKE_LINK_TRAINING (1 << 6) #define DP_NORP 0x004 #define DP_DOWNSTREAMPORT_PRESENT 0x005 # define DP_DWN_STRM_PORT_PRESENT (1 << 0) # define DP_DWN_STRM_PORT_TYPE_MASK 0x06 # define DP_DWN_STRM_PORT_TYPE_DP (0 << 1) # define DP_DWN_STRM_PORT_TYPE_ANALOG (1 << 1) # define DP_DWN_STRM_PORT_TYPE_TMDS (2 << 1) # define DP_DWN_STRM_PORT_TYPE_OTHER (3 << 1) # define DP_FORMAT_CONVERSION (1 << 3) # define DP_DETAILED_CAP_INFO_AVAILABLE (1 << 4) /* DPI */ #define DP_MAIN_LINK_CHANNEL_CODING 0x006 #define DP_DOWN_STREAM_PORT_COUNT 0x007 # define DP_PORT_COUNT_MASK 0x0f # define DP_MSA_TIMING_PAR_IGNORED (1 << 6) /* eDP */ # define DP_OUI_SUPPORT (1 << 7) #define DP_RECEIVE_PORT_0_CAP_0 0x008 # define DP_LOCAL_EDID_PRESENT (1 << 1) # define DP_ASSOCIATED_TO_PRECEDING_PORT (1 << 2) #define DP_RECEIVE_PORT_0_BUFFER_SIZE 0x009 #define DP_RECEIVE_PORT_1_CAP_0 0x00a #define DP_RECEIVE_PORT_1_BUFFER_SIZE 0x00b #define DP_I2C_SPEED_CAP 0x00c /* DPI */ # define DP_I2C_SPEED_1K 0x01 # define DP_I2C_SPEED_5K 0x02 # define DP_I2C_SPEED_10K 0x04 # define DP_I2C_SPEED_100K 0x08 # define DP_I2C_SPEED_400K 0x10 # define DP_I2C_SPEED_1M 0x20 #define DP_EDP_CONFIGURATION_CAP 0x00d /* XXX 1.2? */ # define DP_ALTERNATE_SCRAMBLER_RESET_CAP (1 << 0) # define DP_FRAMING_CHANGE_CAP (1 << 1) # define DP_DPCD_DISPLAY_CONTROL_CAPABLE (1 << 3) /* edp v1.2 or higher */ #define DP_TRAINING_AUX_RD_INTERVAL 0x00e /* XXX 1.2? */ #define DP_ADAPTER_CAP 0x00f /* 1.2 */ # define DP_FORCE_LOAD_SENSE_CAP (1 << 0) # define DP_ALTERNATE_I2C_PATTERN_CAP (1 << 1) #define DP_SUPPORTED_LINK_RATES 0x010 /* eDP 1.4 */ # define DP_MAX_SUPPORTED_RATES 8 /* 16-bit little-endian */ /* Multiple stream transport */ #define DP_FAUX_CAP 0x020 /* 1.2 */ # define DP_FAUX_CAP_1 (1 << 0) #define DP_MSTM_CAP 0x021 /* 1.2 */ # define DP_MST_CAP (1 << 0) #define DP_NUMBER_OF_AUDIO_ENDPOINTS 0x022 /* 1.2 */ /* AV_SYNC_DATA_BLOCK 1.2 */ #define DP_AV_GRANULARITY 0x023 # define DP_AG_FACTOR_MASK (0xf << 0) # define DP_AG_FACTOR_3MS (0 << 0) # define DP_AG_FACTOR_2MS (1 << 0) # define DP_AG_FACTOR_1MS (2 << 0) # define DP_AG_FACTOR_500US (3 << 0) # define DP_AG_FACTOR_200US (4 << 0) # define DP_AG_FACTOR_100US (5 << 0) # define DP_AG_FACTOR_10US (6 << 0) # define DP_AG_FACTOR_1US (7 << 0) # define DP_VG_FACTOR_MASK (0xf << 4) # define DP_VG_FACTOR_3MS (0 << 4) # define DP_VG_FACTOR_2MS (1 << 4) # define DP_VG_FACTOR_1MS (2 << 4) # define DP_VG_FACTOR_500US (3 << 4) # define DP_VG_FACTOR_200US (4 << 4) # define DP_VG_FACTOR_100US (5 << 4) #define DP_AUD_DEC_LAT0 0x024 #define DP_AUD_DEC_LAT1 0x025 #define DP_AUD_PP_LAT0 0x026 #define DP_AUD_PP_LAT1 0x027 #define DP_VID_INTER_LAT 0x028 #define DP_VID_PROG_LAT 0x029 #define DP_REP_LAT 0x02a #define DP_AUD_DEL_INS0 0x02b #define DP_AUD_DEL_INS1 0x02c #define DP_AUD_DEL_INS2 0x02d /* End of AV_SYNC_DATA_BLOCK */ #define DP_RECEIVER_ALPM_CAP 0x02e /* eDP 1.4 */ # define DP_ALPM_CAP (1 << 0) #define DP_SINK_DEVICE_AUX_FRAME_SYNC_CAP 0x02f /* eDP 1.4 */ # define DP_AUX_FRAME_SYNC_CAP (1 << 0) #define DP_GUID 0x030 /* 1.2 */ #define DP_PSR_SUPPORT 0x070 /* XXX 1.2? */ # define DP_PSR_IS_SUPPORTED 1 # define DP_PSR2_IS_SUPPORTED 2 /* eDP 1.4 */ #define DP_PSR_CAPS 0x071 /* XXX 1.2? */ # define DP_PSR_NO_TRAIN_ON_EXIT 1 # define DP_PSR_SETUP_TIME_330 (0 << 1) # define DP_PSR_SETUP_TIME_275 (1 << 1) # define DP_PSR_SETUP_TIME_220 (2 << 1) # define DP_PSR_SETUP_TIME_165 (3 << 1) # define DP_PSR_SETUP_TIME_110 (4 << 1) # define DP_PSR_SETUP_TIME_55 (5 << 1) # define DP_PSR_SETUP_TIME_0 (6 << 1) # define DP_PSR_SETUP_TIME_MASK (7 << 1) # define DP_PSR_SETUP_TIME_SHIFT 1 /* * 0x80-0x8f describe downstream port capabilities, but there are two layouts * based on whether DP_DETAILED_CAP_INFO_AVAILABLE was set. If it was not, * each port's descriptor is one byte wide. If it was set, each port's is * four bytes wide, starting with the one byte from the base info. As of * DP interop v1.1a only VGA defines additional detail. */ /* offset 0 */ #define DP_DOWNSTREAM_PORT_0 0x80 # define DP_DS_PORT_TYPE_MASK (7 << 0) # define DP_DS_PORT_TYPE_DP 0 # define DP_DS_PORT_TYPE_VGA 1 # define DP_DS_PORT_TYPE_DVI 2 # define DP_DS_PORT_TYPE_HDMI 3 # define DP_DS_PORT_TYPE_NON_EDID 4 # define DP_DS_PORT_TYPE_DP_DUALMODE 5 # define DP_DS_PORT_TYPE_WIRELESS 6 # define DP_DS_PORT_HPD (1 << 3) /* offset 1 for VGA is maximum megapixels per second / 8 */ /* offset 2 */ # define DP_DS_MAX_BPC_MASK (3 << 0) # define DP_DS_8BPC 0 # define DP_DS_10BPC 1 # define DP_DS_12BPC 2 # define DP_DS_16BPC 3 /* link configuration */ #define DP_LINK_BW_SET 0x100 # define DP_LINK_RATE_TABLE 0x00 /* eDP 1.4 */ # define DP_LINK_BW_1_62 0x06 # define DP_LINK_BW_2_7 0x0a # define DP_LINK_BW_5_4 0x14 /* 1.2 */ #define DP_LANE_COUNT_SET 0x101 # define DP_LANE_COUNT_MASK 0x0f # define DP_LANE_COUNT_ENHANCED_FRAME_EN (1 << 7) #define DP_TRAINING_PATTERN_SET 0x102 # define DP_TRAINING_PATTERN_DISABLE 0 # define DP_TRAINING_PATTERN_1 1 # define DP_TRAINING_PATTERN_2 2 # define DP_TRAINING_PATTERN_3 3 /* 1.2 */ # define DP_TRAINING_PATTERN_MASK 0x3 /* DPCD 1.1 only. For DPCD >= 1.2 see per-lane DP_LINK_QUAL_LANEn_SET */ # define DP_LINK_QUAL_PATTERN_11_DISABLE (0 << 2) # define DP_LINK_QUAL_PATTERN_11_D10_2 (1 << 2) # define DP_LINK_QUAL_PATTERN_11_ERROR_RATE (2 << 2) # define DP_LINK_QUAL_PATTERN_11_PRBS7 (3 << 2) # define DP_LINK_QUAL_PATTERN_11_MASK (3 << 2) # define DP_RECOVERED_CLOCK_OUT_EN (1 << 4) # define DP_LINK_SCRAMBLING_DISABLE (1 << 5) # define DP_SYMBOL_ERROR_COUNT_BOTH (0 << 6) # define DP_SYMBOL_ERROR_COUNT_DISPARITY (1 << 6) # define DP_SYMBOL_ERROR_COUNT_SYMBOL (2 << 6) # define DP_SYMBOL_ERROR_COUNT_MASK (3 << 6) #define DP_TRAINING_LANE0_SET 0x103 #define DP_TRAINING_LANE1_SET 0x104 #define DP_TRAINING_LANE2_SET 0x105 #define DP_TRAINING_LANE3_SET 0x106 # define DP_TRAIN_VOLTAGE_SWING_MASK 0x3 # define DP_TRAIN_VOLTAGE_SWING_SHIFT 0 # define DP_TRAIN_MAX_SWING_REACHED (1 << 2) # define DP_TRAIN_VOLTAGE_SWING_LEVEL_0 (0 << 0) # define DP_TRAIN_VOLTAGE_SWING_LEVEL_1 (1 << 0) # define DP_TRAIN_VOLTAGE_SWING_LEVEL_2 (2 << 0) # define DP_TRAIN_VOLTAGE_SWING_LEVEL_3 (3 << 0) # define DP_TRAIN_PRE_EMPHASIS_MASK (3 << 3) # define DP_TRAIN_PRE_EMPH_LEVEL_0 (0 << 3) # define DP_TRAIN_PRE_EMPH_LEVEL_1 (1 << 3) # define DP_TRAIN_PRE_EMPH_LEVEL_2 (2 << 3) # define DP_TRAIN_PRE_EMPH_LEVEL_3 (3 << 3) # define DP_TRAIN_PRE_EMPHASIS_SHIFT 3 # define DP_TRAIN_MAX_PRE_EMPHASIS_REACHED (1 << 5) #define DP_DOWNSPREAD_CTRL 0x107 # define DP_SPREAD_AMP_0_5 (1 << 4) # define DP_MSA_TIMING_PAR_IGNORE_EN (1 << 7) /* eDP */ #define DP_MAIN_LINK_CHANNEL_CODING_SET 0x108 # define DP_SET_ANSI_8B10B (1 << 0) #define DP_I2C_SPEED_CONTROL_STATUS 0x109 /* DPI */ /* bitmask as for DP_I2C_SPEED_CAP */ #define DP_EDP_CONFIGURATION_SET 0x10a /* XXX 1.2? */ # define DP_ALTERNATE_SCRAMBLER_RESET_ENABLE (1 << 0) # define DP_FRAMING_CHANGE_ENABLE (1 << 1) # define DP_PANEL_SELF_TEST_ENABLE (1 << 7) #define DP_LINK_QUAL_LANE0_SET 0x10b /* DPCD >= 1.2 */ #define DP_LINK_QUAL_LANE1_SET 0x10c #define DP_LINK_QUAL_LANE2_SET 0x10d #define DP_LINK_QUAL_LANE3_SET 0x10e # define DP_LINK_QUAL_PATTERN_DISABLE 0 # define DP_LINK_QUAL_PATTERN_D10_2 1 # define DP_LINK_QUAL_PATTERN_ERROR_RATE 2 # define DP_LINK_QUAL_PATTERN_PRBS7 3 # define DP_LINK_QUAL_PATTERN_80BIT_CUSTOM 4 # define DP_LINK_QUAL_PATTERN_HBR2_EYE 5 # define DP_LINK_QUAL_PATTERN_MASK 7 #define DP_TRAINING_LANE0_1_SET2 0x10f #define DP_TRAINING_LANE2_3_SET2 0x110 # define DP_LANE02_POST_CURSOR2_SET_MASK (3 << 0) # define DP_LANE02_MAX_POST_CURSOR2_REACHED (1 << 2) # define DP_LANE13_POST_CURSOR2_SET_MASK (3 << 4) # define DP_LANE13_MAX_POST_CURSOR2_REACHED (1 << 6) #define DP_MSTM_CTRL 0x111 /* 1.2 */ # define DP_MST_EN (1 << 0) # define DP_UP_REQ_EN (1 << 1) # define DP_UPSTREAM_IS_SRC (1 << 2) #define DP_AUDIO_DELAY0 0x112 /* 1.2 */ #define DP_AUDIO_DELAY1 0x113 #define DP_AUDIO_DELAY2 0x114 #define DP_LINK_RATE_SET 0x115 /* eDP 1.4 */ # define DP_LINK_RATE_SET_SHIFT 0 # define DP_LINK_RATE_SET_MASK (7 << 0) #define DP_RECEIVER_ALPM_CONFIG 0x116 /* eDP 1.4 */ # define DP_ALPM_ENABLE (1 << 0) # define DP_ALPM_LOCK_ERROR_IRQ_HPD_ENABLE (1 << 1) #define DP_SINK_DEVICE_AUX_FRAME_SYNC_CONF 0x117 /* eDP 1.4 */ # define DP_AUX_FRAME_SYNC_ENABLE (1 << 0) # define DP_IRQ_HPD_ENABLE (1 << 1) #define DP_UPSTREAM_DEVICE_DP_PWR_NEED 0x118 /* 1.2 */ # define DP_PWR_NOT_NEEDED (1 << 0) #define DP_AUX_FRAME_SYNC_VALUE 0x15c /* eDP 1.4 */ # define DP_AUX_FRAME_SYNC_VALID (1 << 0) #define DP_PSR_EN_CFG 0x170 /* XXX 1.2? */ # define DP_PSR_ENABLE (1 << 0) # define DP_PSR_MAIN_LINK_ACTIVE (1 << 1) # define DP_PSR_CRC_VERIFICATION (1 << 2) # define DP_PSR_FRAME_CAPTURE (1 << 3) # define DP_PSR_SELECTIVE_UPDATE (1 << 4) # define DP_PSR_IRQ_HPD_WITH_CRC_ERRORS (1 << 5) # define DP_PSR_ENABLE_PSR2 (1 << 6) /* eDP 1.4a */ #define DP_ADAPTER_CTRL 0x1a0 # define DP_ADAPTER_CTRL_FORCE_LOAD_SENSE (1 << 0) #define DP_BRANCH_DEVICE_CTRL 0x1a1 # define DP_BRANCH_DEVICE_IRQ_HPD (1 << 0) #define DP_PAYLOAD_ALLOCATE_SET 0x1c0 #define DP_PAYLOAD_ALLOCATE_START_TIME_SLOT 0x1c1 #define DP_PAYLOAD_ALLOCATE_TIME_SLOT_COUNT 0x1c2 #define DP_SINK_COUNT 0x200 /* prior to 1.2 bit 7 was reserved mbz */ # define DP_GET_SINK_COUNT(x) ((((x) & 0x80) >> 1) | ((x) & 0x3f)) # define DP_SINK_CP_READY (1 << 6) #define DP_DEVICE_SERVICE_IRQ_VECTOR 0x201 # define DP_REMOTE_CONTROL_COMMAND_PENDING (1 << 0) # define DP_AUTOMATED_TEST_REQUEST (1 << 1) # define DP_CP_IRQ (1 << 2) # define DP_MCCS_IRQ (1 << 3) # define DP_DOWN_REP_MSG_RDY (1 << 4) /* 1.2 MST */ # define DP_UP_REQ_MSG_RDY (1 << 5) /* 1.2 MST */ # define DP_SINK_SPECIFIC_IRQ (1 << 6) #define DP_LANE0_1_STATUS 0x202 #define DP_LANE2_3_STATUS 0x203 # define DP_LANE_CR_DONE (1 << 0) # define DP_LANE_CHANNEL_EQ_DONE (1 << 1) # define DP_LANE_SYMBOL_LOCKED (1 << 2) #define DP_CHANNEL_EQ_BITS (DP_LANE_CR_DONE | \ DP_LANE_CHANNEL_EQ_DONE | \ DP_LANE_SYMBOL_LOCKED) #define DP_LANE_ALIGN_STATUS_UPDATED 0x204 #define DP_INTERLANE_ALIGN_DONE (1 << 0) #define DP_DOWNSTREAM_PORT_STATUS_CHANGED (1 << 6) #define DP_LINK_STATUS_UPDATED (1 << 7) #define DP_SINK_STATUS 0x205 #define DP_RECEIVE_PORT_0_STATUS (1 << 0) #define DP_RECEIVE_PORT_1_STATUS (1 << 1) #define DP_ADJUST_REQUEST_LANE0_1 0x206 #define DP_ADJUST_REQUEST_LANE2_3 0x207 # define DP_ADJUST_VOLTAGE_SWING_LANE0_MASK 0x03 # define DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT 0 # define DP_ADJUST_PRE_EMPHASIS_LANE0_MASK 0x0c # define DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT 2 # define DP_ADJUST_VOLTAGE_SWING_LANE1_MASK 0x30 # define DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT 4 # define DP_ADJUST_PRE_EMPHASIS_LANE1_MASK 0xc0 # define DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT 6 #define DP_TEST_REQUEST 0x218 # define DP_TEST_LINK_TRAINING (1 << 0) # define DP_TEST_LINK_VIDEO_PATTERN (1 << 1) # define DP_TEST_LINK_EDID_READ (1 << 2) # define DP_TEST_LINK_PHY_TEST_PATTERN (1 << 3) /* DPCD >= 1.1 */ # define DP_TEST_LINK_FAUX_PATTERN (1 << 4) /* DPCD >= 1.2 */ #define DP_TEST_LINK_RATE 0x219 # define DP_LINK_RATE_162 (0x6) # define DP_LINK_RATE_27 (0xa) #define DP_TEST_LANE_COUNT 0x220 #define DP_TEST_PATTERN 0x221 #define DP_TEST_CRC_R_CR 0x240 #define DP_TEST_CRC_G_Y 0x242 #define DP_TEST_CRC_B_CB 0x244 #define DP_TEST_SINK_MISC 0x246 # define DP_TEST_CRC_SUPPORTED (1 << 5) # define DP_TEST_COUNT_MASK 0xf #define DP_TEST_RESPONSE 0x260 # define DP_TEST_ACK (1 << 0) # define DP_TEST_NAK (1 << 1) # define DP_TEST_EDID_CHECKSUM_WRITE (1 << 2) #define DP_TEST_EDID_CHECKSUM 0x261 #define DP_TEST_SINK 0x270 # define DP_TEST_SINK_START (1 << 0) #define DP_PAYLOAD_TABLE_UPDATE_STATUS 0x2c0 /* 1.2 MST */ # define DP_PAYLOAD_TABLE_UPDATED (1 << 0) # define DP_PAYLOAD_ACT_HANDLED (1 << 1) #define DP_VC_PAYLOAD_ID_SLOT_1 0x2c1 /* 1.2 MST */ /* up to ID_SLOT_63 at 0x2ff */ #define DP_SOURCE_OUI 0x300 #define DP_SINK_OUI 0x400 #define DP_BRANCH_OUI 0x500 #define DP_BRANCH_ID 0x503 #define DP_BRANCH_HW_REV 0x509 #define DP_BRANCH_SW_REV 0x50A #define DP_SET_POWER 0x600 # define DP_SET_POWER_D0 0x1 # define DP_SET_POWER_D3 0x2 # define DP_SET_POWER_MASK 0x3 #define DP_EDP_DPCD_REV 0x700 /* eDP 1.2 */ # define DP_EDP_11 0x00 # define DP_EDP_12 0x01 # define DP_EDP_13 0x02 # define DP_EDP_14 0x03 #define DP_EDP_GENERAL_CAP_1 0x701 # define DP_EDP_TCON_BACKLIGHT_ADJUSTMENT_CAP (1 << 0) # define DP_EDP_BACKLIGHT_PIN_ENABLE_CAP (1 << 1) # define DP_EDP_BACKLIGHT_AUX_ENABLE_CAP (1 << 2) # define DP_EDP_PANEL_SELF_TEST_PIN_ENABLE_CAP (1 << 3) # define DP_EDP_PANEL_SELF_TEST_AUX_ENABLE_CAP (1 << 4) # define DP_EDP_FRC_ENABLE_CAP (1 << 5) # define DP_EDP_COLOR_ENGINE_CAP (1 << 6) # define DP_EDP_SET_POWER_CAP (1 << 7) #define DP_EDP_BACKLIGHT_ADJUSTMENT_CAP 0x702 # define DP_EDP_BACKLIGHT_BRIGHTNESS_PWM_PIN_CAP (1 << 0) # define DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP (1 << 1) # define DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT (1 << 2) # define DP_EDP_BACKLIGHT_AUX_PWM_PRODUCT_CAP (1 << 3) # define DP_EDP_BACKLIGHT_FREQ_PWM_PIN_PASSTHRU_CAP (1 << 4) # define DP_EDP_BACKLIGHT_FREQ_AUX_SET_CAP (1 << 5) # define DP_EDP_DYNAMIC_BACKLIGHT_CAP (1 << 6) # define DP_EDP_VBLANK_BACKLIGHT_UPDATE_CAP (1 << 7) #define DP_EDP_GENERAL_CAP_2 0x703 # define DP_EDP_OVERDRIVE_ENGINE_ENABLED (1 << 0) #define DP_EDP_GENERAL_CAP_3 0x704 /* eDP 1.4 */ # define DP_EDP_X_REGION_CAP_MASK (0xf << 0) # define DP_EDP_X_REGION_CAP_SHIFT 0 # define DP_EDP_Y_REGION_CAP_MASK (0xf << 4) # define DP_EDP_Y_REGION_CAP_SHIFT 4 #define DP_EDP_DISPLAY_CONTROL_REGISTER 0x720 # define DP_EDP_BACKLIGHT_ENABLE (1 << 0) # define DP_EDP_BLACK_VIDEO_ENABLE (1 << 1) # define DP_EDP_FRC_ENABLE (1 << 2) # define DP_EDP_COLOR_ENGINE_ENABLE (1 << 3) # define DP_EDP_VBLANK_BACKLIGHT_UPDATE_ENABLE (1 << 7) #define DP_EDP_BACKLIGHT_MODE_SET_REGISTER 0x721 # define DP_EDP_BACKLIGHT_CONTROL_MODE_MASK (3 << 0) # define DP_EDP_BACKLIGHT_CONTROL_MODE_PWM (0 << 0) # define DP_EDP_BACKLIGHT_CONTROL_MODE_PRESET (1 << 0) # define DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD (2 << 0) # define DP_EDP_BACKLIGHT_CONTROL_MODE_PRODUCT (3 << 0) # define DP_EDP_BACKLIGHT_FREQ_PWM_PIN_PASSTHRU_ENABLE (1 << 2) # define DP_EDP_BACKLIGHT_FREQ_AUX_SET_ENABLE (1 << 3) # define DP_EDP_DYNAMIC_BACKLIGHT_ENABLE (1 << 4) # define DP_EDP_REGIONAL_BACKLIGHT_ENABLE (1 << 5) # define DP_EDP_UPDATE_REGION_BRIGHTNESS (1 << 6) /* eDP 1.4 */ #define DP_EDP_BACKLIGHT_BRIGHTNESS_MSB 0x722 #define DP_EDP_BACKLIGHT_BRIGHTNESS_LSB 0x723 #define DP_EDP_PWMGEN_BIT_COUNT 0x724 #define DP_EDP_PWMGEN_BIT_COUNT_CAP_MIN 0x725 #define DP_EDP_PWMGEN_BIT_COUNT_CAP_MAX 0x726 #define DP_EDP_BACKLIGHT_CONTROL_STATUS 0x727 #define DP_EDP_BACKLIGHT_FREQ_SET 0x728 #define DP_EDP_BACKLIGHT_FREQ_CAP_MIN_MSB 0x72a #define DP_EDP_BACKLIGHT_FREQ_CAP_MIN_MID 0x72b #define DP_EDP_BACKLIGHT_FREQ_CAP_MIN_LSB 0x72c #define DP_EDP_BACKLIGHT_FREQ_CAP_MAX_MSB 0x72d #define DP_EDP_BACKLIGHT_FREQ_CAP_MAX_MID 0x72e #define DP_EDP_BACKLIGHT_FREQ_CAP_MAX_LSB 0x72f #define DP_EDP_DBC_MINIMUM_BRIGHTNESS_SET 0x732 #define DP_EDP_DBC_MAXIMUM_BRIGHTNESS_SET 0x733 #define DP_EDP_REGIONAL_BACKLIGHT_BASE 0x740 /* eDP 1.4 */ #define DP_EDP_REGIONAL_BACKLIGHT_0 0x741 /* eDP 1.4 */ #define DP_SIDEBAND_MSG_DOWN_REQ_BASE 0x1000 /* 1.2 MST */ #define DP_SIDEBAND_MSG_UP_REP_BASE 0x1200 /* 1.2 MST */ #define DP_SIDEBAND_MSG_DOWN_REP_BASE 0x1400 /* 1.2 MST */ #define DP_SIDEBAND_MSG_UP_REQ_BASE 0x1600 /* 1.2 MST */ #define DP_SINK_COUNT_ESI 0x2002 /* 1.2 */ /* 0-5 sink count */ # define DP_SINK_COUNT_CP_READY (1 << 6) #define DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0 0x2003 /* 1.2 */ #define DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1 0x2004 /* 1.2 */ #define DP_LINK_SERVICE_IRQ_VECTOR_ESI0 0x2005 /* 1.2 */ #define DP_PSR_ERROR_STATUS 0x2006 /* XXX 1.2? */ # define DP_PSR_LINK_CRC_ERROR (1 << 0) # define DP_PSR_RFB_STORAGE_ERROR (1 << 1) # define DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR (1 << 2) /* eDP 1.4 */ #define DP_PSR_ESI 0x2007 /* XXX 1.2? */ # define DP_PSR_CAPS_CHANGE (1 << 0) #define DP_PSR_STATUS 0x2008 /* XXX 1.2? */ # define DP_PSR_SINK_INACTIVE 0 # define DP_PSR_SINK_ACTIVE_SRC_SYNCED 1 # define DP_PSR_SINK_ACTIVE_RFB 2 # define DP_PSR_SINK_ACTIVE_SINK_SYNCED 3 # define DP_PSR_SINK_ACTIVE_RESYNC 4 # define DP_PSR_SINK_INTERNAL_ERROR 7 # define DP_PSR_SINK_STATE_MASK 0x07 #define DP_RECEIVER_ALPM_STATUS 0x200b /* eDP 1.4 */ # define DP_ALPM_LOCK_TIMEOUT_ERROR (1 << 0) /* DP 1.2 Sideband message defines */ /* peer device type - DP 1.2a Table 2-92 */ #define DP_PEER_DEVICE_NONE 0x0 #define DP_PEER_DEVICE_SOURCE_OR_SST 0x1 #define DP_PEER_DEVICE_MST_BRANCHING 0x2 #define DP_PEER_DEVICE_SST_SINK 0x3 #define DP_PEER_DEVICE_DP_LEGACY_CONV 0x4 /* DP 1.2 MST sideband request names DP 1.2a Table 2-80 */ #define DP_LINK_ADDRESS 0x01 #define DP_CONNECTION_STATUS_NOTIFY 0x02 #define DP_ENUM_PATH_RESOURCES 0x10 #define DP_ALLOCATE_PAYLOAD 0x11 #define DP_QUERY_PAYLOAD 0x12 #define DP_RESOURCE_STATUS_NOTIFY 0x13 #define DP_CLEAR_PAYLOAD_ID_TABLE 0x14 #define DP_REMOTE_DPCD_READ 0x20 #define DP_REMOTE_DPCD_WRITE 0x21 #define DP_REMOTE_I2C_READ 0x22 #define DP_REMOTE_I2C_WRITE 0x23 #define DP_POWER_UP_PHY 0x24 #define DP_POWER_DOWN_PHY 0x25 #define DP_SINK_EVENT_NOTIFY 0x30 #define DP_QUERY_STREAM_ENC_STATUS 0x38 /* DP 1.2 MST sideband nak reasons - table 2.84 */ #define DP_NAK_WRITE_FAILURE 0x01 #define DP_NAK_INVALID_READ 0x02 #define DP_NAK_CRC_FAILURE 0x03 #define DP_NAK_BAD_PARAM 0x04 #define DP_NAK_DEFER 0x05 #define DP_NAK_LINK_FAILURE 0x06 #define DP_NAK_NO_RESOURCES 0x07 #define DP_NAK_DPCD_FAIL 0x08 #define DP_NAK_I2C_NAK 0x09 #define DP_NAK_ALLOCATE_FAIL 0x0a #define MODE_I2C_START 1 #define MODE_I2C_WRITE 2 #define MODE_I2C_READ 4 #define MODE_I2C_STOP 8 /* DP 1.2 MST PORTs - Section 2.5.1 v1.2a spec */ #define DP_MST_PHYSICAL_PORT_0 0 #define DP_MST_LOGICAL_PORT_0 8 #define DP_LINK_STATUS_SIZE 6 bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count); bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count); u8 drm_dp_get_adjust_request_voltage(const u8 link_status[DP_LINK_STATUS_SIZE], int lane); u8 drm_dp_get_adjust_request_pre_emphasis(const u8 link_status[DP_LINK_STATUS_SIZE], int lane); #define DP_BRANCH_OUI_HEADER_SIZE 0xc #define DP_RECEIVER_CAP_SIZE 0xf #define EDP_PSR_RECEIVER_CAP_SIZE 2 #define EDP_DISPLAY_CTL_CAP_SIZE 3 void drm_dp_link_train_clock_recovery_delay(const u8 dpcd[DP_RECEIVER_CAP_SIZE]); void drm_dp_link_train_channel_eq_delay(const u8 dpcd[DP_RECEIVER_CAP_SIZE]); u8 drm_dp_link_rate_to_bw_code(int link_rate); int drm_dp_bw_code_to_link_rate(u8 link_bw); struct edp_sdp_header { u8 HB0; /* Secondary Data Packet ID */ u8 HB1; /* Secondary Data Packet Type */ u8 HB2; /* 7:5 reserved, 4:0 revision number */ u8 HB3; /* 7:5 reserved, 4:0 number of valid data bytes */ } __packed; #define EDP_SDP_HEADER_REVISION_MASK 0x1F #define EDP_SDP_HEADER_VALID_PAYLOAD_BYTES 0x1F struct edp_vsc_psr { struct edp_sdp_header sdp_header; u8 DB0; /* Stereo Interface */ u8 DB1; /* 0 - PSR State; 1 - Update RFB; 2 - CRC Valid */ u8 DB2; /* CRC value bits 7:0 of the R or Cr component */ u8 DB3; /* CRC value bits 15:8 of the R or Cr component */ u8 DB4; /* CRC value bits 7:0 of the G or Y component */ u8 DB5; /* CRC value bits 15:8 of the G or Y component */ u8 DB6; /* CRC value bits 7:0 of the B or Cb component */ u8 DB7; /* CRC value bits 15:8 of the B or Cb component */ u8 DB8_31[24]; /* Reserved */ } __packed; #define EDP_VSC_PSR_STATE_ACTIVE (1<<0) #define EDP_VSC_PSR_UPDATE_RFB (1<<1) #define EDP_VSC_PSR_CRC_VALUES_VALID (1<<2) int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]); static inline int drm_dp_max_link_rate(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) { return drm_dp_bw_code_to_link_rate(dpcd[DP_MAX_LINK_RATE]); } static inline u8 drm_dp_max_lane_count(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) { return dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK; } static inline bool drm_dp_enhanced_frame_cap(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) { return dpcd[DP_DPCD_REV] >= 0x11 && (dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP); } static inline bool drm_dp_tps3_supported(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) { return dpcd[DP_DPCD_REV] >= 0x12 && dpcd[DP_MAX_LANE_COUNT] & DP_TPS3_SUPPORTED; } /* * DisplayPort AUX channel */ /** * struct drm_dp_aux_msg - DisplayPort AUX channel transaction * @address: address of the (first) register to access * @request: contains the type of transaction (see DP_AUX_* macros) * @reply: upon completion, contains the reply type of the transaction * @buffer: pointer to a transmission or reception buffer * @size: size of @buffer */ struct drm_dp_aux_msg { unsigned int address; u8 request; u8 reply; void *buffer; size_t size; }; /** * struct drm_dp_aux - DisplayPort AUX channel * @name: user-visible name of this AUX channel and the I2C-over-AUX adapter * @ddc: I2C adapter that can be used for I2C-over-AUX communication * @dev: pointer to struct device that is the parent for this AUX channel * @hw_mutex: internal mutex used for locking transfers * @transfer: transfers a message representing a single AUX transaction * * The .dev field should be set to a pointer to the device that implements * the AUX channel. * * The .name field may be used to specify the name of the I2C adapter. If set to * NULL, dev_name() of .dev will be used. * * Drivers provide a hardware-specific implementation of how transactions * are executed via the .transfer() function. A pointer to a drm_dp_aux_msg * structure describing the transaction is passed into this function. Upon * success, the implementation should return the number of payload bytes * that were transferred, or a negative error-code on failure. Helpers * propagate errors from the .transfer() function, with the exception of * the -EBUSY error, which causes a transaction to be retried. On a short, * helpers will return -EPROTO to make it simpler to check for failure. * * An AUX channel can also be used to transport I2C messages to a sink. A * typical application of that is to access an EDID that's present in the * sink device. The .transfer() function can also be used to execute such * transactions. The drm_dp_aux_register() function registers an I2C * adapter that can be passed to drm_probe_ddc(). Upon removal, drivers * should call drm_dp_aux_unregister() to remove the I2C adapter. * The I2C adapter uses long transfers by default; if a partial response is * received, the adapter will drop down to the size given by the partial * response for this transaction only. * * Note that the aux helper code assumes that the .transfer() function * only modifies the reply field of the drm_dp_aux_msg structure. The * retry logic and i2c helpers assume this is the case. */ struct drm_dp_aux { const char *name; struct i2c_adapter ddc; struct device *dev; struct mutex hw_mutex; ssize_t (*transfer)(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg); /** * @i2c_nack_count: Counts I2C NACKs, used for DP validation. */ unsigned i2c_nack_count; /** * @i2c_defer_count: Counts I2C DEFERs, used for DP validation. */ unsigned i2c_defer_count; }; ssize_t drm_dp_dpcd_read(struct drm_dp_aux *aux, unsigned int offset, void *buffer, size_t size); ssize_t drm_dp_dpcd_write(struct drm_dp_aux *aux, unsigned int offset, void *buffer, size_t size); /** * drm_dp_dpcd_readb() - read a single byte from the DPCD * @aux: DisplayPort AUX channel * @offset: address of the register to read * @valuep: location where the value of the register will be stored * * Returns the number of bytes transferred (1) on success, or a negative * error code on failure. */ static inline ssize_t drm_dp_dpcd_readb(struct drm_dp_aux *aux, unsigned int offset, u8 *valuep) { return drm_dp_dpcd_read(aux, offset, valuep, 1); } /** * drm_dp_dpcd_writeb() - write a single byte to the DPCD * @aux: DisplayPort AUX channel * @offset: address of the register to write * @value: value to write to the register * * Returns the number of bytes transferred (1) on success, or a negative * error code on failure. */ static inline ssize_t drm_dp_dpcd_writeb(struct drm_dp_aux *aux, unsigned int offset, u8 value) { return drm_dp_dpcd_write(aux, offset, &value, 1); } int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux, u8 status[DP_LINK_STATUS_SIZE]); /* * DisplayPort link */ #define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0) struct drm_dp_link { unsigned char revision; unsigned int rate; unsigned int num_lanes; unsigned long capabilities; }; int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link); int drm_dp_link_power_up(struct drm_dp_aux *aux, struct drm_dp_link *link); int drm_dp_link_power_down(struct drm_dp_aux *aux, struct drm_dp_link *link); int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link); int drm_dp_downstream_max_clock(const u8 dpcd[DP_RECEIVER_CAP_SIZE], const u8 port_cap[4]); int drm_dp_downstream_max_bpc(const u8 dpcd[DP_RECEIVER_CAP_SIZE], const u8 port_cap[4]); int drm_dp_downstream_id(struct drm_dp_aux *aux, char id[6]); void drm_dp_downstream_debug(struct seq_file *m, const u8 dpcd[DP_RECEIVER_CAP_SIZE], const u8 port_cap[4], struct drm_dp_aux *aux); void drm_dp_aux_init(struct drm_dp_aux *aux); int drm_dp_aux_register(struct drm_dp_aux *aux); void drm_dp_aux_unregister(struct drm_dp_aux *aux); #endif /* _DRM_DP_HELPER_H_ */ |