1 /* 2 * Copyright 2018 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: AMD 23 * 24 */ 25 26 #include <linux/uaccess.h> 27 28 #include <drm/drm_debugfs.h> 29 30 #include "dc.h" 31 #include "amdgpu.h" 32 #include "amdgpu_dm.h" 33 #include "amdgpu_dm_debugfs.h" 34 #include "dm_helpers.h" 35 #include "dmub/inc/dmub_srv.h" 36 37 struct dmub_debugfs_trace_header { 38 uint32_t entry_count; 39 uint32_t reserved[3]; 40 }; 41 42 struct dmub_debugfs_trace_entry { 43 uint32_t trace_code; 44 uint32_t tick_count; 45 uint32_t param0; 46 uint32_t param1; 47 }; 48 49 /* function description 50 * get/ set DP configuration: lane_count, link_rate, spread_spectrum 51 * 52 * valid lane count value: 1, 2, 4 53 * valid link rate value: 54 * 06h = 1.62Gbps per lane 55 * 0Ah = 2.7Gbps per lane 56 * 0Ch = 3.24Gbps per lane 57 * 14h = 5.4Gbps per lane 58 * 1Eh = 8.1Gbps per lane 59 * 60 * debugfs is located at /sys/kernel/debug/dri/0/DP-x/link_settings 61 * 62 * --- to get dp configuration 63 * 64 * cat link_settings 65 * 66 * It will list current, verified, reported, preferred dp configuration. 67 * current -- for current video mode 68 * verified --- maximum configuration which pass link training 69 * reported --- DP rx report caps (DPCD register offset 0, 1 2) 70 * preferred --- user force settings 71 * 72 * --- set (or force) dp configuration 73 * 74 * echo <lane_count> <link_rate> > link_settings 75 * 76 * for example, to force to 2 lane, 2.7GHz, 77 * echo 4 0xa > link_settings 78 * 79 * spread_spectrum could not be changed dynamically. 80 * 81 * in case invalid lane count, link rate are force, no hw programming will be 82 * done. please check link settings after force operation to see if HW get 83 * programming. 84 * 85 * cat link_settings 86 * 87 * check current and preferred settings. 88 * 89 */ 90 static ssize_t dp_link_settings_read(struct file *f, char __user *buf, 91 size_t size, loff_t *pos) 92 { 93 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 94 struct dc_link *link = connector->dc_link; 95 char *rd_buf = NULL; 96 char *rd_buf_ptr = NULL; 97 const uint32_t rd_buf_size = 100; 98 uint32_t result = 0; 99 uint8_t str_len = 0; 100 int r; 101 102 if (*pos & 3 || size & 3) 103 return -EINVAL; 104 105 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); 106 if (!rd_buf) 107 return 0; 108 109 rd_buf_ptr = rd_buf; 110 111 str_len = strlen("Current: %d %d %d "); 112 snprintf(rd_buf_ptr, str_len, "Current: %d %d %d ", 113 link->cur_link_settings.lane_count, 114 link->cur_link_settings.link_rate, 115 link->cur_link_settings.link_spread); 116 rd_buf_ptr += str_len; 117 118 str_len = strlen("Verified: %d %d %d "); 119 snprintf(rd_buf_ptr, str_len, "Verified: %d %d %d ", 120 link->verified_link_cap.lane_count, 121 link->verified_link_cap.link_rate, 122 link->verified_link_cap.link_spread); 123 rd_buf_ptr += str_len; 124 125 str_len = strlen("Reported: %d %d %d "); 126 snprintf(rd_buf_ptr, str_len, "Reported: %d %d %d ", 127 link->reported_link_cap.lane_count, 128 link->reported_link_cap.link_rate, 129 link->reported_link_cap.link_spread); 130 rd_buf_ptr += str_len; 131 132 str_len = strlen("Preferred: %d %d %d "); 133 snprintf(rd_buf_ptr, str_len, "Preferred: %d %d %d\n", 134 link->preferred_link_setting.lane_count, 135 link->preferred_link_setting.link_rate, 136 link->preferred_link_setting.link_spread); 137 138 while (size) { 139 if (*pos >= rd_buf_size) 140 break; 141 142 r = put_user(*(rd_buf + result), buf); 143 if (r) 144 return r; /* r = -EFAULT */ 145 146 buf += 1; 147 size -= 1; 148 *pos += 1; 149 result += 1; 150 } 151 152 kfree(rd_buf); 153 return result; 154 } 155 156 static ssize_t dp_link_settings_write(struct file *f, const char __user *buf, 157 size_t size, loff_t *pos) 158 { 159 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 160 struct dc_link *link = connector->dc_link; 161 struct dc *dc = (struct dc *)link->dc; 162 struct dc_link_settings prefer_link_settings; 163 char *wr_buf = NULL; 164 char *wr_buf_ptr = NULL; 165 const uint32_t wr_buf_size = 40; 166 int r; 167 int bytes_from_user; 168 char *sub_str; 169 /* 0: lane_count; 1: link_rate */ 170 uint8_t param_index = 0; 171 long param[2]; 172 const char delimiter[3] = {' ', '\n', '\0'}; 173 bool valid_input = false; 174 175 if (size == 0) 176 return -EINVAL; 177 178 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); 179 if (!wr_buf) 180 return -EINVAL; 181 wr_buf_ptr = wr_buf; 182 183 r = copy_from_user(wr_buf_ptr, buf, wr_buf_size); 184 185 /* r is bytes not be copied */ 186 if (r >= wr_buf_size) { 187 kfree(wr_buf); 188 DRM_DEBUG_DRIVER("user data not read\n"); 189 return -EINVAL; 190 } 191 192 bytes_from_user = wr_buf_size - r; 193 194 while (isspace(*wr_buf_ptr)) 195 wr_buf_ptr++; 196 197 while ((*wr_buf_ptr != '\0') && (param_index < 2)) { 198 199 sub_str = strsep(&wr_buf_ptr, delimiter); 200 201 r = kstrtol(sub_str, 16, ¶m[param_index]); 202 203 if (r) 204 DRM_DEBUG_DRIVER("string to int convert error code: %d\n", r); 205 206 param_index++; 207 while (isspace(*wr_buf_ptr)) 208 wr_buf_ptr++; 209 } 210 211 switch (param[0]) { 212 case LANE_COUNT_ONE: 213 case LANE_COUNT_TWO: 214 case LANE_COUNT_FOUR: 215 valid_input = true; 216 break; 217 default: 218 break; 219 } 220 221 switch (param[1]) { 222 case LINK_RATE_LOW: 223 case LINK_RATE_HIGH: 224 case LINK_RATE_RBR2: 225 case LINK_RATE_HIGH2: 226 case LINK_RATE_HIGH3: 227 valid_input = true; 228 break; 229 default: 230 break; 231 } 232 233 if (!valid_input) { 234 kfree(wr_buf); 235 DRM_DEBUG_DRIVER("Invalid Input value No HW will be programmed\n"); 236 return bytes_from_user; 237 } 238 239 /* save user force lane_count, link_rate to preferred settings 240 * spread spectrum will not be changed 241 */ 242 prefer_link_settings.link_spread = link->cur_link_settings.link_spread; 243 prefer_link_settings.lane_count = param[0]; 244 prefer_link_settings.link_rate = param[1]; 245 246 dc_link_set_preferred_link_settings(dc, &prefer_link_settings, link); 247 248 kfree(wr_buf); 249 return bytes_from_user; 250 } 251 252 /* function: get current DP PHY settings: voltage swing, pre-emphasis, 253 * post-cursor2 (defined by VESA DP specification) 254 * 255 * valid values 256 * voltage swing: 0,1,2,3 257 * pre-emphasis : 0,1,2,3 258 * post cursor2 : 0,1,2,3 259 * 260 * 261 * how to use this debugfs 262 * 263 * debugfs is located at /sys/kernel/debug/dri/0/DP-x 264 * 265 * there will be directories, like DP-1, DP-2,DP-3, etc. for DP display 266 * 267 * To figure out which DP-x is the display for DP to be check, 268 * cd DP-x 269 * ls -ll 270 * There should be debugfs file, like link_settings, phy_settings. 271 * cat link_settings 272 * from lane_count, link_rate to figure which DP-x is for display to be worked 273 * on 274 * 275 * To get current DP PHY settings, 276 * cat phy_settings 277 * 278 * To change DP PHY settings, 279 * echo <voltage_swing> <pre-emphasis> <post_cursor2> > phy_settings 280 * for examle, to change voltage swing to 2, pre-emphasis to 3, post_cursor2 to 281 * 0, 282 * echo 2 3 0 > phy_settings 283 * 284 * To check if change be applied, get current phy settings by 285 * cat phy_settings 286 * 287 * In case invalid values are set by user, like 288 * echo 1 4 0 > phy_settings 289 * 290 * HW will NOT be programmed by these settings. 291 * cat phy_settings will show the previous valid settings. 292 */ 293 static ssize_t dp_phy_settings_read(struct file *f, char __user *buf, 294 size_t size, loff_t *pos) 295 { 296 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 297 struct dc_link *link = connector->dc_link; 298 char *rd_buf = NULL; 299 const uint32_t rd_buf_size = 20; 300 uint32_t result = 0; 301 int r; 302 303 if (*pos & 3 || size & 3) 304 return -EINVAL; 305 306 rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); 307 if (!rd_buf) 308 return -EINVAL; 309 310 snprintf(rd_buf, rd_buf_size, " %d %d %d ", 311 link->cur_lane_setting.VOLTAGE_SWING, 312 link->cur_lane_setting.PRE_EMPHASIS, 313 link->cur_lane_setting.POST_CURSOR2); 314 315 while (size) { 316 if (*pos >= rd_buf_size) 317 break; 318 319 r = put_user((*(rd_buf + result)), buf); 320 if (r) 321 return r; /* r = -EFAULT */ 322 323 buf += 1; 324 size -= 1; 325 *pos += 1; 326 result += 1; 327 } 328 329 kfree(rd_buf); 330 return result; 331 } 332 333 static ssize_t dp_phy_settings_write(struct file *f, const char __user *buf, 334 size_t size, loff_t *pos) 335 { 336 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 337 struct dc_link *link = connector->dc_link; 338 struct dc *dc = (struct dc *)link->dc; 339 char *wr_buf = NULL; 340 char *wr_buf_ptr = NULL; 341 uint32_t wr_buf_size = 40; 342 int r; 343 int bytes_from_user; 344 char *sub_str; 345 uint8_t param_index = 0; 346 long param[3]; 347 const char delimiter[3] = {' ', '\n', '\0'}; 348 bool use_prefer_link_setting; 349 struct link_training_settings link_lane_settings; 350 351 if (size == 0) 352 return 0; 353 354 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); 355 if (!wr_buf) 356 return 0; 357 wr_buf_ptr = wr_buf; 358 359 r = copy_from_user(wr_buf_ptr, buf, wr_buf_size); 360 361 /* r is bytes not be copied */ 362 if (r >= wr_buf_size) { 363 kfree(wr_buf); 364 DRM_DEBUG_DRIVER("user data not be read\n"); 365 return 0; 366 } 367 368 bytes_from_user = wr_buf_size - r; 369 370 while (isspace(*wr_buf_ptr)) 371 wr_buf_ptr++; 372 373 while ((*wr_buf_ptr != '\0') && (param_index < 3)) { 374 375 sub_str = strsep(&wr_buf_ptr, delimiter); 376 377 r = kstrtol(sub_str, 16, ¶m[param_index]); 378 379 if (r) 380 DRM_DEBUG_DRIVER("string to int convert error code: %d\n", r); 381 382 param_index++; 383 while (isspace(*wr_buf_ptr)) 384 wr_buf_ptr++; 385 } 386 387 if ((param[0] > VOLTAGE_SWING_MAX_LEVEL) || 388 (param[1] > PRE_EMPHASIS_MAX_LEVEL) || 389 (param[2] > POST_CURSOR2_MAX_LEVEL)) { 390 kfree(wr_buf); 391 DRM_DEBUG_DRIVER("Invalid Input No HW will be programmed\n"); 392 return bytes_from_user; 393 } 394 395 /* get link settings: lane count, link rate */ 396 use_prefer_link_setting = 397 ((link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN) && 398 (link->test_pattern_enabled)); 399 400 memset(&link_lane_settings, 0, sizeof(link_lane_settings)); 401 402 if (use_prefer_link_setting) { 403 link_lane_settings.link_settings.lane_count = 404 link->preferred_link_setting.lane_count; 405 link_lane_settings.link_settings.link_rate = 406 link->preferred_link_setting.link_rate; 407 link_lane_settings.link_settings.link_spread = 408 link->preferred_link_setting.link_spread; 409 } else { 410 link_lane_settings.link_settings.lane_count = 411 link->cur_link_settings.lane_count; 412 link_lane_settings.link_settings.link_rate = 413 link->cur_link_settings.link_rate; 414 link_lane_settings.link_settings.link_spread = 415 link->cur_link_settings.link_spread; 416 } 417 418 /* apply phy settings from user */ 419 for (r = 0; r < link_lane_settings.link_settings.lane_count; r++) { 420 link_lane_settings.lane_settings[r].VOLTAGE_SWING = 421 (enum dc_voltage_swing) (param[0]); 422 link_lane_settings.lane_settings[r].PRE_EMPHASIS = 423 (enum dc_pre_emphasis) (param[1]); 424 link_lane_settings.lane_settings[r].POST_CURSOR2 = 425 (enum dc_post_cursor2) (param[2]); 426 } 427 428 /* program ASIC registers and DPCD registers */ 429 dc_link_set_drive_settings(dc, &link_lane_settings, link); 430 431 kfree(wr_buf); 432 return bytes_from_user; 433 } 434 435 /* function description 436 * 437 * set PHY layer or Link layer test pattern 438 * PHY test pattern is used for PHY SI check. 439 * Link layer test will not affect PHY SI. 440 * 441 * Reset Test Pattern: 442 * 0 = DP_TEST_PATTERN_VIDEO_MODE 443 * 444 * PHY test pattern supported: 445 * 1 = DP_TEST_PATTERN_D102 446 * 2 = DP_TEST_PATTERN_SYMBOL_ERROR 447 * 3 = DP_TEST_PATTERN_PRBS7 448 * 4 = DP_TEST_PATTERN_80BIT_CUSTOM 449 * 5 = DP_TEST_PATTERN_CP2520_1 450 * 6 = DP_TEST_PATTERN_CP2520_2 = DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE 451 * 7 = DP_TEST_PATTERN_CP2520_3 452 * 453 * DP PHY Link Training Patterns 454 * 8 = DP_TEST_PATTERN_TRAINING_PATTERN1 455 * 9 = DP_TEST_PATTERN_TRAINING_PATTERN2 456 * a = DP_TEST_PATTERN_TRAINING_PATTERN3 457 * b = DP_TEST_PATTERN_TRAINING_PATTERN4 458 * 459 * DP Link Layer Test pattern 460 * c = DP_TEST_PATTERN_COLOR_SQUARES 461 * d = DP_TEST_PATTERN_COLOR_SQUARES_CEA 462 * e = DP_TEST_PATTERN_VERTICAL_BARS 463 * f = DP_TEST_PATTERN_HORIZONTAL_BARS 464 * 10= DP_TEST_PATTERN_COLOR_RAMP 465 * 466 * debugfs phy_test_pattern is located at /syskernel/debug/dri/0/DP-x 467 * 468 * --- set test pattern 469 * echo <test pattern #> > test_pattern 470 * 471 * If test pattern # is not supported, NO HW programming will be done. 472 * for DP_TEST_PATTERN_80BIT_CUSTOM, it needs extra 10 bytes of data 473 * for the user pattern. input 10 bytes data are separated by space 474 * 475 * echo 0x4 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88 0x99 0xaa > test_pattern 476 * 477 * --- reset test pattern 478 * echo 0 > test_pattern 479 * 480 * --- HPD detection is disabled when set PHY test pattern 481 * 482 * when PHY test pattern (pattern # within [1,7]) is set, HPD pin of HW ASIC 483 * is disable. User could unplug DP display from DP connected and plug scope to 484 * check test pattern PHY SI. 485 * If there is need unplug scope and plug DP display back, do steps below: 486 * echo 0 > phy_test_pattern 487 * unplug scope 488 * plug DP display. 489 * 490 * "echo 0 > phy_test_pattern" will re-enable HPD pin again so that video sw 491 * driver could detect "unplug scope" and "plug DP display" 492 */ 493 static ssize_t dp_phy_test_pattern_debugfs_write(struct file *f, const char __user *buf, 494 size_t size, loff_t *pos) 495 { 496 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 497 struct dc_link *link = connector->dc_link; 498 char *wr_buf = NULL; 499 char *wr_buf_ptr = NULL; 500 uint32_t wr_buf_size = 100; 501 uint32_t wr_buf_count = 0; 502 int r; 503 int bytes_from_user; 504 char *sub_str = NULL; 505 uint8_t param_index = 0; 506 uint8_t param_nums = 0; 507 long param[11] = {0x0}; 508 const char delimiter[3] = {' ', '\n', '\0'}; 509 enum dp_test_pattern test_pattern = DP_TEST_PATTERN_UNSUPPORTED; 510 bool disable_hpd = false; 511 bool valid_test_pattern = false; 512 /* init with defalut 80bit custom pattern */ 513 uint8_t custom_pattern[10] = { 514 0x1f, 0x7c, 0xf0, 0xc1, 0x07, 515 0x1f, 0x7c, 0xf0, 0xc1, 0x07 516 }; 517 struct dc_link_settings prefer_link_settings = {LANE_COUNT_UNKNOWN, 518 LINK_RATE_UNKNOWN, LINK_SPREAD_DISABLED}; 519 struct dc_link_settings cur_link_settings = {LANE_COUNT_UNKNOWN, 520 LINK_RATE_UNKNOWN, LINK_SPREAD_DISABLED}; 521 struct link_training_settings link_training_settings; 522 int i; 523 524 if (size == 0) 525 return 0; 526 527 wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); 528 if (!wr_buf) 529 return 0; 530 wr_buf_ptr = wr_buf; 531 532 r = copy_from_user(wr_buf_ptr, buf, wr_buf_size); 533 534 /* r is bytes not be copied */ 535 if (r >= wr_buf_size) { 536 kfree(wr_buf); 537 DRM_DEBUG_DRIVER("user data not be read\n"); 538 return 0; 539 } 540 541 bytes_from_user = wr_buf_size - r; 542 543 /* check number of parameters. isspace could not differ space and \n */ 544 while ((*wr_buf_ptr != 0xa) && (wr_buf_count < wr_buf_size)) { 545 /* skip space*/ 546 while (isspace(*wr_buf_ptr) && (wr_buf_count < wr_buf_size)) { 547 wr_buf_ptr++; 548 wr_buf_count++; 549 } 550 551 if (wr_buf_count == wr_buf_size) 552 break; 553 554 /* skip non-space*/ 555 while ((!isspace(*wr_buf_ptr)) && (wr_buf_count < wr_buf_size)) { 556 wr_buf_ptr++; 557 wr_buf_count++; 558 } 559 560 param_nums++; 561 562 if (wr_buf_count == wr_buf_size) 563 break; 564 } 565 566 /* max 11 parameters */ 567 if (param_nums > 11) 568 param_nums = 11; 569 570 wr_buf_ptr = wr_buf; /* reset buf pinter */ 571 wr_buf_count = 0; /* number of char already checked */ 572 573 while (isspace(*wr_buf_ptr) && (wr_buf_count < wr_buf_size)) { 574 wr_buf_ptr++; 575 wr_buf_count++; 576 } 577 578 while (param_index < param_nums) { 579 /* after strsep, wr_buf_ptr will be moved to after space */ 580 sub_str = strsep(&wr_buf_ptr, delimiter); 581 582 r = kstrtol(sub_str, 16, ¶m[param_index]); 583 584 if (r) 585 DRM_DEBUG_DRIVER("string to int convert error code: %d\n", r); 586 587 param_index++; 588 } 589 590 test_pattern = param[0]; 591 592 switch (test_pattern) { 593 case DP_TEST_PATTERN_VIDEO_MODE: 594 case DP_TEST_PATTERN_COLOR_SQUARES: 595 case DP_TEST_PATTERN_COLOR_SQUARES_CEA: 596 case DP_TEST_PATTERN_VERTICAL_BARS: 597 case DP_TEST_PATTERN_HORIZONTAL_BARS: 598 case DP_TEST_PATTERN_COLOR_RAMP: 599 valid_test_pattern = true; 600 break; 601 602 case DP_TEST_PATTERN_D102: 603 case DP_TEST_PATTERN_SYMBOL_ERROR: 604 case DP_TEST_PATTERN_PRBS7: 605 case DP_TEST_PATTERN_80BIT_CUSTOM: 606 case DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE: 607 case DP_TEST_PATTERN_TRAINING_PATTERN4: 608 disable_hpd = true; 609 valid_test_pattern = true; 610 break; 611 612 default: 613 valid_test_pattern = false; 614 test_pattern = DP_TEST_PATTERN_UNSUPPORTED; 615 break; 616 } 617 618 if (!valid_test_pattern) { 619 kfree(wr_buf); 620 DRM_DEBUG_DRIVER("Invalid Test Pattern Parameters\n"); 621 return bytes_from_user; 622 } 623 624 if (test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM) { 625 for (i = 0; i < 10; i++) { 626 if ((uint8_t) param[i + 1] != 0x0) 627 break; 628 } 629 630 if (i < 10) { 631 /* not use default value */ 632 for (i = 0; i < 10; i++) 633 custom_pattern[i] = (uint8_t) param[i + 1]; 634 } 635 } 636 637 /* Usage: set DP physical test pattern using debugfs with normal DP 638 * panel. Then plug out DP panel and connect a scope to measure 639 * For normal video mode and test pattern generated from CRCT, 640 * they are visibile to user. So do not disable HPD. 641 * Video Mode is also set to clear the test pattern, so enable HPD 642 * because it might have been disabled after a test pattern was set. 643 * AUX depends on HPD * sequence dependent, do not move! 644 */ 645 if (!disable_hpd) 646 dc_link_enable_hpd(link); 647 648 prefer_link_settings.lane_count = link->verified_link_cap.lane_count; 649 prefer_link_settings.link_rate = link->verified_link_cap.link_rate; 650 prefer_link_settings.link_spread = link->verified_link_cap.link_spread; 651 652 cur_link_settings.lane_count = link->cur_link_settings.lane_count; 653 cur_link_settings.link_rate = link->cur_link_settings.link_rate; 654 cur_link_settings.link_spread = link->cur_link_settings.link_spread; 655 656 link_training_settings.link_settings = cur_link_settings; 657 658 659 if (test_pattern != DP_TEST_PATTERN_VIDEO_MODE) { 660 if (prefer_link_settings.lane_count != LANE_COUNT_UNKNOWN && 661 prefer_link_settings.link_rate != LINK_RATE_UNKNOWN && 662 (prefer_link_settings.lane_count != cur_link_settings.lane_count || 663 prefer_link_settings.link_rate != cur_link_settings.link_rate)) 664 link_training_settings.link_settings = prefer_link_settings; 665 } 666 667 for (i = 0; i < (unsigned int)(link_training_settings.link_settings.lane_count); i++) 668 link_training_settings.lane_settings[i] = link->cur_lane_setting; 669 670 dc_link_set_test_pattern( 671 link, 672 test_pattern, 673 DP_TEST_PATTERN_COLOR_SPACE_RGB, 674 &link_training_settings, 675 custom_pattern, 676 10); 677 678 /* Usage: Set DP physical test pattern using AMDDP with normal DP panel 679 * Then plug out DP panel and connect a scope to measure DP PHY signal. 680 * Need disable interrupt to avoid SW driver disable DP output. This is 681 * done after the test pattern is set. 682 */ 683 if (valid_test_pattern && disable_hpd) 684 dc_link_disable_hpd(link); 685 686 kfree(wr_buf); 687 688 return bytes_from_user; 689 } 690 691 /** 692 * Returns the DMCUB tracebuffer contents. 693 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmub_tracebuffer 694 */ 695 static int dmub_tracebuffer_show(struct seq_file *m, void *data) 696 { 697 struct amdgpu_device *adev = m->private; 698 struct dmub_srv_fb_info *fb_info = adev->dm.dmub_fb_info; 699 struct dmub_debugfs_trace_entry *entries; 700 uint8_t *tbuf_base; 701 uint32_t tbuf_size, max_entries, num_entries, i; 702 703 if (!fb_info) 704 return 0; 705 706 tbuf_base = (uint8_t *)fb_info->fb[DMUB_WINDOW_5_TRACEBUFF].cpu_addr; 707 if (!tbuf_base) 708 return 0; 709 710 tbuf_size = fb_info->fb[DMUB_WINDOW_5_TRACEBUFF].size; 711 max_entries = (tbuf_size - sizeof(struct dmub_debugfs_trace_header)) / 712 sizeof(struct dmub_debugfs_trace_entry); 713 714 num_entries = 715 ((struct dmub_debugfs_trace_header *)tbuf_base)->entry_count; 716 717 num_entries = min(num_entries, max_entries); 718 719 entries = (struct dmub_debugfs_trace_entry 720 *)(tbuf_base + 721 sizeof(struct dmub_debugfs_trace_header)); 722 723 for (i = 0; i < num_entries; ++i) { 724 struct dmub_debugfs_trace_entry *entry = &entries[i]; 725 726 seq_printf(m, 727 "trace_code=%u tick_count=%u param0=%u param1=%u\n", 728 entry->trace_code, entry->tick_count, entry->param0, 729 entry->param1); 730 } 731 732 return 0; 733 } 734 735 /** 736 * Returns the DMCUB firmware state contents. 737 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmub_fw_state 738 */ 739 static int dmub_fw_state_show(struct seq_file *m, void *data) 740 { 741 struct amdgpu_device *adev = m->private; 742 struct dmub_srv_fb_info *fb_info = adev->dm.dmub_fb_info; 743 uint8_t *state_base; 744 uint32_t state_size; 745 746 if (!fb_info) 747 return 0; 748 749 state_base = (uint8_t *)fb_info->fb[DMUB_WINDOW_6_FW_STATE].cpu_addr; 750 if (!state_base) 751 return 0; 752 753 state_size = fb_info->fb[DMUB_WINDOW_6_FW_STATE].size; 754 755 return seq_write(m, state_base, state_size); 756 } 757 758 /* 759 * Returns the current and maximum output bpc for the connector. 760 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc 761 */ 762 static int output_bpc_show(struct seq_file *m, void *data) 763 { 764 struct drm_connector *connector = m->private; 765 struct drm_device *dev = connector->dev; 766 struct drm_crtc *crtc = NULL; 767 struct dm_crtc_state *dm_crtc_state = NULL; 768 int res = -ENODEV; 769 unsigned int bpc; 770 771 mutex_lock(&dev->mode_config.mutex); 772 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 773 774 if (connector->state == NULL) 775 goto unlock; 776 777 crtc = connector->state->crtc; 778 if (crtc == NULL) 779 goto unlock; 780 781 drm_modeset_lock(&crtc->mutex, NULL); 782 if (crtc->state == NULL) 783 goto unlock; 784 785 dm_crtc_state = to_dm_crtc_state(crtc->state); 786 if (dm_crtc_state->stream == NULL) 787 goto unlock; 788 789 switch (dm_crtc_state->stream->timing.display_color_depth) { 790 case COLOR_DEPTH_666: 791 bpc = 6; 792 break; 793 case COLOR_DEPTH_888: 794 bpc = 8; 795 break; 796 case COLOR_DEPTH_101010: 797 bpc = 10; 798 break; 799 case COLOR_DEPTH_121212: 800 bpc = 12; 801 break; 802 case COLOR_DEPTH_161616: 803 bpc = 16; 804 break; 805 default: 806 goto unlock; 807 } 808 809 seq_printf(m, "Current: %u\n", bpc); 810 seq_printf(m, "Maximum: %u\n", connector->display_info.bpc); 811 res = 0; 812 813 unlock: 814 if (crtc) 815 drm_modeset_unlock(&crtc->mutex); 816 817 drm_modeset_unlock(&dev->mode_config.connection_mutex); 818 mutex_unlock(&dev->mode_config.mutex); 819 820 return res; 821 } 822 823 /* 824 * Returns the min and max vrr vfreq through the connector's debugfs file. 825 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range 826 */ 827 static int vrr_range_show(struct seq_file *m, void *data) 828 { 829 struct drm_connector *connector = m->private; 830 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); 831 832 if (connector->status != connector_status_connected) 833 return -ENODEV; 834 835 seq_printf(m, "Min: %u\n", (unsigned int)aconnector->min_vfreq); 836 seq_printf(m, "Max: %u\n", (unsigned int)aconnector->max_vfreq); 837 838 return 0; 839 } 840 841 /* function description 842 * 843 * generic SDP message access for testing 844 * 845 * debugfs sdp_message is located at /syskernel/debug/dri/0/DP-x 846 * 847 * SDP header 848 * Hb0 : Secondary-Data Packet ID 849 * Hb1 : Secondary-Data Packet type 850 * Hb2 : Secondary-Data-packet-specific header, Byte 0 851 * Hb3 : Secondary-Data-packet-specific header, Byte 1 852 * 853 * for using custom sdp message: input 4 bytes SDP header and 32 bytes raw data 854 */ 855 static ssize_t dp_sdp_message_debugfs_write(struct file *f, const char __user *buf, 856 size_t size, loff_t *pos) 857 { 858 int r; 859 uint8_t data[36]; 860 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 861 struct dm_crtc_state *acrtc_state; 862 uint32_t write_size = 36; 863 864 if (connector->base.status != connector_status_connected) 865 return -ENODEV; 866 867 if (size == 0) 868 return 0; 869 870 acrtc_state = to_dm_crtc_state(connector->base.state->crtc->state); 871 872 r = copy_from_user(data, buf, write_size); 873 874 write_size -= r; 875 876 dc_stream_send_dp_sdp(acrtc_state->stream, data, write_size); 877 878 return write_size; 879 } 880 881 static ssize_t dp_dpcd_address_write(struct file *f, const char __user *buf, 882 size_t size, loff_t *pos) 883 { 884 int r; 885 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 886 887 if (size < sizeof(connector->debugfs_dpcd_address)) 888 return 0; 889 890 r = copy_from_user(&connector->debugfs_dpcd_address, 891 buf, sizeof(connector->debugfs_dpcd_address)); 892 893 return size - r; 894 } 895 896 static ssize_t dp_dpcd_size_write(struct file *f, const char __user *buf, 897 size_t size, loff_t *pos) 898 { 899 int r; 900 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 901 902 if (size < sizeof(connector->debugfs_dpcd_size)) 903 return 0; 904 905 r = copy_from_user(&connector->debugfs_dpcd_size, 906 buf, sizeof(connector->debugfs_dpcd_size)); 907 908 if (connector->debugfs_dpcd_size > 256) 909 connector->debugfs_dpcd_size = 0; 910 911 return size - r; 912 } 913 914 static ssize_t dp_dpcd_data_write(struct file *f, const char __user *buf, 915 size_t size, loff_t *pos) 916 { 917 int r; 918 char *data; 919 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 920 struct dc_link *link = connector->dc_link; 921 uint32_t write_size = connector->debugfs_dpcd_size; 922 923 if (size < write_size) 924 return 0; 925 926 data = kzalloc(write_size, GFP_KERNEL); 927 if (!data) 928 return 0; 929 930 r = copy_from_user(data, buf, write_size); 931 932 dm_helpers_dp_write_dpcd(link->ctx, link, 933 connector->debugfs_dpcd_address, data, write_size - r); 934 kfree(data); 935 return write_size - r; 936 } 937 938 static ssize_t dp_dpcd_data_read(struct file *f, char __user *buf, 939 size_t size, loff_t *pos) 940 { 941 int r; 942 char *data; 943 struct amdgpu_dm_connector *connector = file_inode(f)->i_private; 944 struct dc_link *link = connector->dc_link; 945 uint32_t read_size = connector->debugfs_dpcd_size; 946 947 if (size < read_size) 948 return 0; 949 950 data = kzalloc(read_size, GFP_KERNEL); 951 if (!data) 952 return 0; 953 954 dm_helpers_dp_read_dpcd(link->ctx, link, 955 connector->debugfs_dpcd_address, data, read_size); 956 957 r = copy_to_user(buf, data, read_size); 958 959 kfree(data); 960 return read_size - r; 961 } 962 963 DEFINE_SHOW_ATTRIBUTE(dmub_fw_state); 964 DEFINE_SHOW_ATTRIBUTE(dmub_tracebuffer); 965 DEFINE_SHOW_ATTRIBUTE(output_bpc); 966 DEFINE_SHOW_ATTRIBUTE(vrr_range); 967 968 static const struct file_operations dp_link_settings_debugfs_fops = { 969 .owner = THIS_MODULE, 970 .read = dp_link_settings_read, 971 .write = dp_link_settings_write, 972 .llseek = default_llseek 973 }; 974 975 static const struct file_operations dp_phy_settings_debugfs_fop = { 976 .owner = THIS_MODULE, 977 .read = dp_phy_settings_read, 978 .write = dp_phy_settings_write, 979 .llseek = default_llseek 980 }; 981 982 static const struct file_operations dp_phy_test_pattern_fops = { 983 .owner = THIS_MODULE, 984 .write = dp_phy_test_pattern_debugfs_write, 985 .llseek = default_llseek 986 }; 987 988 static const struct file_operations sdp_message_fops = { 989 .owner = THIS_MODULE, 990 .write = dp_sdp_message_debugfs_write, 991 .llseek = default_llseek 992 }; 993 994 static const struct file_operations dp_dpcd_address_debugfs_fops = { 995 .owner = THIS_MODULE, 996 .write = dp_dpcd_address_write, 997 .llseek = default_llseek 998 }; 999 1000 static const struct file_operations dp_dpcd_size_debugfs_fops = { 1001 .owner = THIS_MODULE, 1002 .write = dp_dpcd_size_write, 1003 .llseek = default_llseek 1004 }; 1005 1006 static const struct file_operations dp_dpcd_data_debugfs_fops = { 1007 .owner = THIS_MODULE, 1008 .read = dp_dpcd_data_read, 1009 .write = dp_dpcd_data_write, 1010 .llseek = default_llseek 1011 }; 1012 1013 static const struct { 1014 char *name; 1015 const struct file_operations *fops; 1016 } dp_debugfs_entries[] = { 1017 {"link_settings", &dp_link_settings_debugfs_fops}, 1018 {"phy_settings", &dp_phy_settings_debugfs_fop}, 1019 {"test_pattern", &dp_phy_test_pattern_fops}, 1020 {"output_bpc", &output_bpc_fops}, 1021 {"vrr_range", &vrr_range_fops}, 1022 {"sdp_message", &sdp_message_fops}, 1023 {"aux_dpcd_address", &dp_dpcd_address_debugfs_fops}, 1024 {"aux_dpcd_size", &dp_dpcd_size_debugfs_fops}, 1025 {"aux_dpcd_data", &dp_dpcd_data_debugfs_fops} 1026 }; 1027 1028 /* 1029 * Force YUV420 output if available from the given mode 1030 */ 1031 static int force_yuv420_output_set(void *data, u64 val) 1032 { 1033 struct amdgpu_dm_connector *connector = data; 1034 1035 connector->force_yuv420_output = (bool)val; 1036 1037 return 0; 1038 } 1039 1040 /* 1041 * Check if YUV420 is forced when available from the given mode 1042 */ 1043 static int force_yuv420_output_get(void *data, u64 *val) 1044 { 1045 struct amdgpu_dm_connector *connector = data; 1046 1047 *val = connector->force_yuv420_output; 1048 1049 return 0; 1050 } 1051 1052 DEFINE_DEBUGFS_ATTRIBUTE(force_yuv420_output_fops, force_yuv420_output_get, 1053 force_yuv420_output_set, "%llu\n"); 1054 1055 /* 1056 * Read PSR state 1057 */ 1058 static int psr_get(void *data, u64 *val) 1059 { 1060 struct amdgpu_dm_connector *connector = data; 1061 struct dc_link *link = connector->dc_link; 1062 uint32_t psr_state = 0; 1063 1064 dc_link_get_psr_state(link, &psr_state); 1065 1066 *val = psr_state; 1067 1068 return 0; 1069 } 1070 1071 1072 DEFINE_DEBUGFS_ATTRIBUTE(psr_fops, psr_get, NULL, "%llu\n"); 1073 1074 void connector_debugfs_init(struct amdgpu_dm_connector *connector) 1075 { 1076 int i; 1077 struct dentry *dir = connector->base.debugfs_entry; 1078 1079 if (connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort || 1080 connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) { 1081 for (i = 0; i < ARRAY_SIZE(dp_debugfs_entries); i++) { 1082 debugfs_create_file(dp_debugfs_entries[i].name, 1083 0644, dir, connector, 1084 dp_debugfs_entries[i].fops); 1085 } 1086 } 1087 if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) 1088 debugfs_create_file_unsafe("psr_state", 0444, dir, connector, &psr_fops); 1089 1090 debugfs_create_file_unsafe("force_yuv420_output", 0644, dir, connector, 1091 &force_yuv420_output_fops); 1092 1093 connector->debugfs_dpcd_address = 0; 1094 connector->debugfs_dpcd_size = 0; 1095 1096 } 1097 1098 /* 1099 * Writes DTN log state to the user supplied buffer. 1100 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log 1101 */ 1102 static ssize_t dtn_log_read( 1103 struct file *f, 1104 char __user *buf, 1105 size_t size, 1106 loff_t *pos) 1107 { 1108 struct amdgpu_device *adev = file_inode(f)->i_private; 1109 struct dc *dc = adev->dm.dc; 1110 struct dc_log_buffer_ctx log_ctx = { 0 }; 1111 ssize_t result = 0; 1112 1113 if (!buf || !size) 1114 return -EINVAL; 1115 1116 if (!dc->hwss.log_hw_state) 1117 return 0; 1118 1119 dc->hwss.log_hw_state(dc, &log_ctx); 1120 1121 if (*pos < log_ctx.pos) { 1122 size_t to_copy = log_ctx.pos - *pos; 1123 1124 to_copy = min(to_copy, size); 1125 1126 if (!copy_to_user(buf, log_ctx.buf + *pos, to_copy)) { 1127 *pos += to_copy; 1128 result = to_copy; 1129 } 1130 } 1131 1132 kfree(log_ctx.buf); 1133 1134 return result; 1135 } 1136 1137 /* 1138 * Writes DTN log state to dmesg when triggered via a write. 1139 * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log 1140 */ 1141 static ssize_t dtn_log_write( 1142 struct file *f, 1143 const char __user *buf, 1144 size_t size, 1145 loff_t *pos) 1146 { 1147 struct amdgpu_device *adev = file_inode(f)->i_private; 1148 struct dc *dc = adev->dm.dc; 1149 1150 /* Write triggers log output via dmesg. */ 1151 if (size == 0) 1152 return 0; 1153 1154 if (dc->hwss.log_hw_state) 1155 dc->hwss.log_hw_state(dc, NULL); 1156 1157 return size; 1158 } 1159 1160 /* 1161 * Backlight at this moment. Read only. 1162 * As written to display, taking ABM and backlight lut into account. 1163 * Ranges from 0x0 to 0x10000 (= 100% PWM) 1164 */ 1165 static int current_backlight_read(struct seq_file *m, void *data) 1166 { 1167 struct drm_info_node *node = (struct drm_info_node *)m->private; 1168 struct drm_device *dev = node->minor->dev; 1169 struct amdgpu_device *adev = dev->dev_private; 1170 struct dc *dc = adev->dm.dc; 1171 unsigned int backlight = dc_get_current_backlight_pwm(dc); 1172 1173 seq_printf(m, "0x%x\n", backlight); 1174 return 0; 1175 } 1176 1177 /* 1178 * Backlight value that is being approached. Read only. 1179 * As written to display, taking ABM and backlight lut into account. 1180 * Ranges from 0x0 to 0x10000 (= 100% PWM) 1181 */ 1182 static int target_backlight_read(struct seq_file *m, void *data) 1183 { 1184 struct drm_info_node *node = (struct drm_info_node *)m->private; 1185 struct drm_device *dev = node->minor->dev; 1186 struct amdgpu_device *adev = dev->dev_private; 1187 struct dc *dc = adev->dm.dc; 1188 unsigned int backlight = dc_get_target_backlight_pwm(dc); 1189 1190 seq_printf(m, "0x%x\n", backlight); 1191 return 0; 1192 } 1193 1194 static int mst_topo(struct seq_file *m, void *unused) 1195 { 1196 struct drm_info_node *node = (struct drm_info_node *)m->private; 1197 struct drm_device *dev = node->minor->dev; 1198 struct drm_connector *connector; 1199 struct drm_connector_list_iter conn_iter; 1200 struct amdgpu_dm_connector *aconnector; 1201 1202 drm_connector_list_iter_begin(dev, &conn_iter); 1203 drm_for_each_connector_iter(connector, &conn_iter) { 1204 if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) 1205 continue; 1206 1207 aconnector = to_amdgpu_dm_connector(connector); 1208 1209 seq_printf(m, "\nMST topology for connector %d\n", aconnector->connector_id); 1210 drm_dp_mst_dump_topology(m, &aconnector->mst_mgr); 1211 } 1212 drm_connector_list_iter_end(&conn_iter); 1213 1214 return 0; 1215 } 1216 1217 static const struct drm_info_list amdgpu_dm_debugfs_list[] = { 1218 {"amdgpu_current_backlight_pwm", ¤t_backlight_read}, 1219 {"amdgpu_target_backlight_pwm", &target_backlight_read}, 1220 {"amdgpu_mst_topology", &mst_topo}, 1221 }; 1222 1223 /* 1224 * Sets the DC visual confirm debug option from the given string. 1225 * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_visual_confirm 1226 */ 1227 static int visual_confirm_set(void *data, u64 val) 1228 { 1229 struct amdgpu_device *adev = data; 1230 1231 adev->dm.dc->debug.visual_confirm = (enum visual_confirm)val; 1232 1233 return 0; 1234 } 1235 1236 /* 1237 * Reads the DC visual confirm debug option value into the given buffer. 1238 * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_visual_confirm 1239 */ 1240 static int visual_confirm_get(void *data, u64 *val) 1241 { 1242 struct amdgpu_device *adev = data; 1243 1244 *val = adev->dm.dc->debug.visual_confirm; 1245 1246 return 0; 1247 } 1248 1249 DEFINE_DEBUGFS_ATTRIBUTE(visual_confirm_fops, visual_confirm_get, 1250 visual_confirm_set, "%llu\n"); 1251 1252 int dtn_debugfs_init(struct amdgpu_device *adev) 1253 { 1254 static const struct file_operations dtn_log_fops = { 1255 .owner = THIS_MODULE, 1256 .read = dtn_log_read, 1257 .write = dtn_log_write, 1258 .llseek = default_llseek 1259 }; 1260 1261 struct drm_minor *minor = adev->ddev->primary; 1262 struct dentry *root = minor->debugfs_root; 1263 int ret; 1264 1265 ret = amdgpu_debugfs_add_files(adev, amdgpu_dm_debugfs_list, 1266 ARRAY_SIZE(amdgpu_dm_debugfs_list)); 1267 if (ret) 1268 return ret; 1269 1270 debugfs_create_file("amdgpu_dm_dtn_log", 0644, root, adev, 1271 &dtn_log_fops); 1272 1273 debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev, 1274 &visual_confirm_fops); 1275 1276 debugfs_create_file_unsafe("amdgpu_dm_dmub_tracebuffer", 0644, root, 1277 adev, &dmub_tracebuffer_fops); 1278 1279 debugfs_create_file_unsafe("amdgpu_dm_dmub_fw_state", 0644, root, 1280 adev, &dmub_fw_state_fops); 1281 1282 return 0; 1283 } 1284