1 /* 2 * Copyright (C) 2015 Red Hat Inc. 3 * Hans de Goede <hdegoede@redhat.com> 4 * Copyright (C) 2008 SuSE Linux Products GmbH 5 * Thomas Renninger <trenn@suse.de> 6 * 7 * May be copied or modified under the terms of the GNU General Public License 8 * 9 * video_detect.c: 10 * After PCI devices are glued with ACPI devices 11 * acpi_get_pci_dev() can be called to identify ACPI graphics 12 * devices for which a real graphics card is plugged in 13 * 14 * Depending on whether ACPI graphics extensions (cmp. ACPI spec Appendix B) 15 * are available, video.ko should be used to handle the device. 16 * 17 * Otherwise vendor specific drivers like thinkpad_acpi, asus-laptop, 18 * sony_acpi,... can take care about backlight brightness. 19 * 20 * Backlight drivers can use acpi_video_get_backlight_type() to determine which 21 * driver should handle the backlight. RAW/GPU-driver backlight drivers must 22 * use the acpi_video_backlight_use_native() helper for this. 23 * 24 * If CONFIG_ACPI_VIDEO is neither set as "compiled in" (y) nor as a module (m) 25 * this file will not be compiled and acpi_video_get_backlight_type() will 26 * always return acpi_backlight_vendor. 27 */ 28 29 #include <linux/export.h> 30 #include <linux/acpi.h> 31 #include <linux/apple-gmux.h> 32 #include <linux/backlight.h> 33 #include <linux/dmi.h> 34 #include <linux/module.h> 35 #include <linux/pci.h> 36 #include <linux/platform_data/x86/nvidia-wmi-ec-backlight.h> 37 #include <linux/pnp.h> 38 #include <linux/types.h> 39 #include <linux/workqueue.h> 40 #include <acpi/video.h> 41 42 static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef; 43 static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef; 44 45 static void acpi_video_parse_cmdline(void) 46 { 47 if (!strcmp("vendor", acpi_video_backlight_string)) 48 acpi_backlight_cmdline = acpi_backlight_vendor; 49 if (!strcmp("video", acpi_video_backlight_string)) 50 acpi_backlight_cmdline = acpi_backlight_video; 51 if (!strcmp("native", acpi_video_backlight_string)) 52 acpi_backlight_cmdline = acpi_backlight_native; 53 if (!strcmp("nvidia_wmi_ec", acpi_video_backlight_string)) 54 acpi_backlight_cmdline = acpi_backlight_nvidia_wmi_ec; 55 if (!strcmp("apple_gmux", acpi_video_backlight_string)) 56 acpi_backlight_cmdline = acpi_backlight_apple_gmux; 57 if (!strcmp("dell_uart", acpi_video_backlight_string)) 58 acpi_backlight_cmdline = acpi_backlight_dell_uart; 59 if (!strcmp("none", acpi_video_backlight_string)) 60 acpi_backlight_cmdline = acpi_backlight_none; 61 } 62 63 static acpi_status 64 find_video(acpi_handle handle, u32 lvl, void *context, void **rv) 65 { 66 struct acpi_device *acpi_dev = acpi_fetch_acpi_dev(handle); 67 long *cap = context; 68 struct pci_dev *dev; 69 70 if (acpi_dev_is_video_device(acpi_dev)) { 71 dev = acpi_dev_get_pci_dev(acpi_dev); 72 if (!dev) 73 return AE_OK; 74 pci_dev_put(dev); 75 *cap |= acpi_is_video_device(handle); 76 } 77 return AE_OK; 78 } 79 80 /* This depends on ACPI_WMI which is X86 only */ 81 #ifdef CONFIG_X86 82 static bool nvidia_wmi_ec_supported(void) 83 { 84 struct wmi_brightness_args args = { 85 .mode = WMI_BRIGHTNESS_MODE_GET, 86 .val = 0, 87 .ret = 0, 88 }; 89 struct acpi_buffer buf = { (acpi_size)sizeof(args), &args }; 90 acpi_status status; 91 92 status = wmi_evaluate_method(WMI_BRIGHTNESS_GUID, 0, 93 WMI_BRIGHTNESS_METHOD_SOURCE, &buf, &buf); 94 if (ACPI_FAILURE(status)) 95 return false; 96 97 /* 98 * If brightness is handled by the EC then nvidia-wmi-ec-backlight 99 * should be used, else the GPU driver(s) should be used. 100 */ 101 return args.ret == WMI_BRIGHTNESS_SOURCE_EC; 102 } 103 #else 104 static bool nvidia_wmi_ec_supported(void) 105 { 106 return false; 107 } 108 #endif 109 110 /* Force to use vendor driver when the ACPI device is known to be 111 * buggy */ 112 static int video_detect_force_vendor(const struct dmi_system_id *d) 113 { 114 acpi_backlight_dmi = acpi_backlight_vendor; 115 return 0; 116 } 117 118 static int video_detect_force_video(const struct dmi_system_id *d) 119 { 120 acpi_backlight_dmi = acpi_backlight_video; 121 return 0; 122 } 123 124 static int video_detect_force_native(const struct dmi_system_id *d) 125 { 126 acpi_backlight_dmi = acpi_backlight_native; 127 return 0; 128 } 129 130 static int video_detect_portege_r100(const struct dmi_system_id *d) 131 { 132 struct pci_dev *dev; 133 /* Search for Trident CyberBlade XP4m32 to confirm Portégé R100 */ 134 dev = pci_get_device(PCI_VENDOR_ID_TRIDENT, 0x2100, NULL); 135 if (dev) { 136 acpi_backlight_dmi = acpi_backlight_vendor; 137 pci_dev_put(dev); 138 } 139 return 0; 140 } 141 142 static const struct dmi_system_id video_detect_dmi_table[] = { 143 /* 144 * Models which should use the vendor backlight interface, 145 * because of broken ACPI video backlight control. 146 */ 147 { 148 /* https://bugzilla.redhat.com/show_bug.cgi?id=1128309 */ 149 .callback = video_detect_force_vendor, 150 /* Acer KAV80 */ 151 .matches = { 152 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 153 DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"), 154 }, 155 }, 156 { 157 .callback = video_detect_force_vendor, 158 /* Asus UL30VT */ 159 .matches = { 160 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 161 DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"), 162 }, 163 }, 164 { 165 .callback = video_detect_force_vendor, 166 /* Asus UL30A */ 167 .matches = { 168 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 169 DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"), 170 }, 171 }, 172 { 173 .callback = video_detect_force_vendor, 174 /* Asus X55U */ 175 .matches = { 176 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 177 DMI_MATCH(DMI_PRODUCT_NAME, "X55U"), 178 }, 179 }, 180 { 181 /* https://bugs.launchpad.net/bugs/1000146 */ 182 .callback = video_detect_force_vendor, 183 /* Asus X101CH */ 184 .matches = { 185 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 186 DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"), 187 }, 188 }, 189 { 190 .callback = video_detect_force_vendor, 191 /* Asus X401U */ 192 .matches = { 193 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 194 DMI_MATCH(DMI_PRODUCT_NAME, "X401U"), 195 }, 196 }, 197 { 198 .callback = video_detect_force_vendor, 199 /* Asus X501U */ 200 .matches = { 201 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 202 DMI_MATCH(DMI_PRODUCT_NAME, "X501U"), 203 }, 204 }, 205 { 206 /* https://bugs.launchpad.net/bugs/1000146 */ 207 .callback = video_detect_force_vendor, 208 /* Asus 1015CX */ 209 .matches = { 210 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 211 DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"), 212 }, 213 }, 214 { 215 .callback = video_detect_force_vendor, 216 /* Samsung N150/N210/N220 */ 217 .matches = { 218 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 219 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"), 220 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"), 221 }, 222 }, 223 { 224 .callback = video_detect_force_vendor, 225 /* Samsung NF110/NF210/NF310 */ 226 .matches = { 227 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 228 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"), 229 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"), 230 }, 231 }, 232 { 233 .callback = video_detect_force_vendor, 234 /* Samsung NC210 */ 235 .matches = { 236 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 237 DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"), 238 DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"), 239 }, 240 }, 241 242 /* 243 * Models which should use the vendor backlight interface, 244 * because of broken native backlight control. 245 */ 246 { 247 .callback = video_detect_force_vendor, 248 /* Sony Vaio PCG-FRV35 */ 249 .matches = { 250 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 251 DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"), 252 }, 253 }, 254 { 255 .callback = video_detect_force_vendor, 256 /* Panasonic Toughbook CF-18 */ 257 .matches = { 258 DMI_MATCH(DMI_SYS_VENDOR, "Matsushita Electric Industrial"), 259 DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"), 260 }, 261 }, 262 263 /* 264 * Toshiba models with Transflective display, these need to use 265 * the toshiba_acpi vendor driver for proper Transflective handling. 266 */ 267 { 268 .callback = video_detect_force_vendor, 269 .matches = { 270 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 271 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R500"), 272 }, 273 }, 274 { 275 .callback = video_detect_force_vendor, 276 .matches = { 277 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 278 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R600"), 279 }, 280 }, 281 282 /* 283 * Toshiba Portégé R100 has working both acpi_video and toshiba_acpi 284 * vendor driver. But none of them gets activated as it has a VGA with 285 * no kernel driver (Trident CyberBlade XP4m32). 286 * The DMI strings are generic so check for the VGA chip in callback. 287 */ 288 { 289 .callback = video_detect_portege_r100, 290 .matches = { 291 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 292 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 293 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 294 DMI_MATCH(DMI_BOARD_NAME, "Portable PC") 295 }, 296 }, 297 298 /* 299 * Models which need acpi_video backlight control where the GPU drivers 300 * do not call acpi_video_register_backlight() because no internal panel 301 * is detected. Typically these are all-in-ones (monitors with builtin 302 * PC) where the panel connection shows up as regular DP instead of eDP. 303 */ 304 { 305 .callback = video_detect_force_video, 306 /* Apple iMac14,1 */ 307 .matches = { 308 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 309 DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,1"), 310 }, 311 }, 312 { 313 .callback = video_detect_force_video, 314 /* Apple iMac14,2 */ 315 .matches = { 316 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 317 DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,2"), 318 }, 319 }, 320 321 /* 322 * These models have a working acpi_video backlight control, and using 323 * native backlight causes a regression where backlight does not work 324 * when userspace is not handling brightness key events. Disable 325 * native_backlight on these to fix this: 326 * https://bugzilla.kernel.org/show_bug.cgi?id=81691 327 */ 328 { 329 .callback = video_detect_force_video, 330 /* ThinkPad T420 */ 331 .matches = { 332 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 333 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"), 334 }, 335 }, 336 { 337 .callback = video_detect_force_video, 338 /* ThinkPad T520 */ 339 .matches = { 340 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 341 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"), 342 }, 343 }, 344 { 345 .callback = video_detect_force_video, 346 /* ThinkPad X201s */ 347 .matches = { 348 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 349 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), 350 }, 351 }, 352 { 353 .callback = video_detect_force_video, 354 /* ThinkPad X201T */ 355 .matches = { 356 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 357 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"), 358 }, 359 }, 360 361 /* The native backlight controls do not work on some older machines */ 362 { 363 /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */ 364 .callback = video_detect_force_video, 365 /* HP ENVY 15 Notebook */ 366 .matches = { 367 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 368 DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"), 369 }, 370 }, 371 { 372 .callback = video_detect_force_video, 373 /* SAMSUNG 870Z5E/880Z5E/680Z5E */ 374 .matches = { 375 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 376 DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"), 377 }, 378 }, 379 { 380 .callback = video_detect_force_video, 381 /* SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V */ 382 .matches = { 383 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 384 DMI_MATCH(DMI_PRODUCT_NAME, 385 "370R4E/370R4V/370R5E/3570RE/370R5V"), 386 }, 387 }, 388 { 389 /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */ 390 .callback = video_detect_force_video, 391 /* SAMSUNG 3570R/370R/470R/450R/510R/4450RV */ 392 .matches = { 393 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 394 DMI_MATCH(DMI_PRODUCT_NAME, 395 "3570R/370R/470R/450R/510R/4450RV"), 396 }, 397 }, 398 { 399 /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */ 400 .callback = video_detect_force_video, 401 /* SAMSUNG 670Z5E */ 402 .matches = { 403 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 404 DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"), 405 }, 406 }, 407 { 408 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */ 409 .callback = video_detect_force_video, 410 /* SAMSUNG 730U3E/740U3E */ 411 .matches = { 412 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 413 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"), 414 }, 415 }, 416 { 417 /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */ 418 .callback = video_detect_force_video, 419 /* SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D */ 420 .matches = { 421 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 422 DMI_MATCH(DMI_PRODUCT_NAME, 423 "900X3C/900X3D/900X3E/900X4C/900X4D"), 424 }, 425 }, 426 { 427 /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */ 428 .callback = video_detect_force_video, 429 /* Dell XPS14 L421X */ 430 .matches = { 431 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 432 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), 433 }, 434 }, 435 { 436 /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */ 437 .callback = video_detect_force_video, 438 /* Dell XPS15 L521X */ 439 .matches = { 440 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 441 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), 442 }, 443 }, 444 { 445 /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */ 446 .callback = video_detect_force_video, 447 /* SAMSUNG 530U4E/540U4E */ 448 .matches = { 449 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 450 DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"), 451 }, 452 }, 453 { 454 /* https://bugs.launchpad.net/bugs/1894667 */ 455 .callback = video_detect_force_video, 456 /* HP 635 Notebook */ 457 .matches = { 458 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 459 DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"), 460 }, 461 }, 462 463 /* Non win8 machines which need native backlight nevertheless */ 464 { 465 /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */ 466 .callback = video_detect_force_native, 467 /* Lenovo Ideapad S405 */ 468 .matches = { 469 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 470 DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"), 471 }, 472 }, 473 { 474 /* https://bugzilla.suse.com/show_bug.cgi?id=1208724 */ 475 .callback = video_detect_force_native, 476 /* Lenovo Ideapad Z470 */ 477 .matches = { 478 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 479 DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad Z470"), 480 }, 481 }, 482 { 483 /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */ 484 .callback = video_detect_force_native, 485 /* Lenovo Ideapad Z570 */ 486 .matches = { 487 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 488 DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"), 489 }, 490 }, 491 { 492 .callback = video_detect_force_native, 493 /* Lenovo E41-25 */ 494 .matches = { 495 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 496 DMI_MATCH(DMI_PRODUCT_NAME, "81FS"), 497 }, 498 }, 499 { 500 .callback = video_detect_force_native, 501 /* Lenovo E41-45 */ 502 .matches = { 503 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 504 DMI_MATCH(DMI_PRODUCT_NAME, "82BK"), 505 }, 506 }, 507 { 508 .callback = video_detect_force_native, 509 /* Lenovo Slim 7 16ARH7 */ 510 .matches = { 511 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 512 DMI_MATCH(DMI_PRODUCT_NAME, "82UX"), 513 }, 514 }, 515 { 516 .callback = video_detect_force_native, 517 /* Lenovo ThinkPad X131e (3371 AMD version) */ 518 .matches = { 519 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 520 DMI_MATCH(DMI_PRODUCT_NAME, "3371"), 521 }, 522 }, 523 { 524 .callback = video_detect_force_native, 525 /* Apple iMac11,3 */ 526 .matches = { 527 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 528 DMI_MATCH(DMI_PRODUCT_NAME, "iMac11,3"), 529 }, 530 }, 531 { 532 /* https://gitlab.freedesktop.org/drm/amd/-/issues/1838 */ 533 .callback = video_detect_force_native, 534 /* Apple iMac12,1 */ 535 .matches = { 536 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 537 DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,1"), 538 }, 539 }, 540 { 541 /* https://gitlab.freedesktop.org/drm/amd/-/issues/2753 */ 542 .callback = video_detect_force_native, 543 /* Apple iMac12,2 */ 544 .matches = { 545 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 546 DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,2"), 547 }, 548 }, 549 { 550 .callback = video_detect_force_native, 551 /* Apple MacBook Air 7,2 */ 552 .matches = { 553 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 554 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir7,2"), 555 }, 556 }, 557 { 558 .callback = video_detect_force_native, 559 /* Apple MacBook Air 9,1 */ 560 .matches = { 561 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 562 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir9,1"), 563 }, 564 }, 565 { 566 .callback = video_detect_force_native, 567 /* Apple MacBook Pro 9,2 */ 568 .matches = { 569 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 570 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,2"), 571 }, 572 }, 573 { 574 .callback = video_detect_force_native, 575 /* Apple MacBook Pro 11,2 */ 576 .matches = { 577 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 578 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro11,2"), 579 }, 580 }, 581 { 582 /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */ 583 .callback = video_detect_force_native, 584 /* Apple MacBook Pro 12,1 */ 585 .matches = { 586 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 587 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"), 588 }, 589 }, 590 { 591 .callback = video_detect_force_native, 592 /* Apple MacBook Pro 16,2 */ 593 .matches = { 594 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 595 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,2"), 596 }, 597 }, 598 { 599 .callback = video_detect_force_native, 600 /* Dell Inspiron N4010 */ 601 .matches = { 602 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 603 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N4010"), 604 }, 605 }, 606 { 607 .callback = video_detect_force_native, 608 /* Dell Vostro V131 */ 609 .matches = { 610 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 611 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), 612 }, 613 }, 614 { 615 /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */ 616 .callback = video_detect_force_native, 617 /* Dell XPS 17 L702X */ 618 .matches = { 619 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 620 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"), 621 }, 622 }, 623 { 624 .callback = video_detect_force_native, 625 /* Dell Precision 7510 */ 626 .matches = { 627 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 628 DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"), 629 }, 630 }, 631 { 632 .callback = video_detect_force_native, 633 /* Dell Studio 1569 */ 634 .matches = { 635 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 636 DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1569"), 637 }, 638 }, 639 { 640 .callback = video_detect_force_native, 641 /* Acer Aspire 3830TG */ 642 .matches = { 643 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 644 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3830TG"), 645 }, 646 }, 647 { 648 .callback = video_detect_force_native, 649 /* Acer Aspire 4810T */ 650 .matches = { 651 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 652 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"), 653 }, 654 }, 655 { 656 .callback = video_detect_force_native, 657 /* Acer Aspire 5738z */ 658 .matches = { 659 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 660 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"), 661 DMI_MATCH(DMI_BOARD_NAME, "JV50"), 662 }, 663 }, 664 { 665 /* https://bugzilla.redhat.com/show_bug.cgi?id=1012674 */ 666 .callback = video_detect_force_native, 667 /* Acer Aspire 5741 */ 668 .matches = { 669 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 670 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"), 671 }, 672 }, 673 { 674 /* https://bugzilla.kernel.org/show_bug.cgi?id=42993 */ 675 .callback = video_detect_force_native, 676 /* Acer Aspire 5750 */ 677 .matches = { 678 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 679 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"), 680 }, 681 }, 682 { 683 /* https://bugzilla.kernel.org/show_bug.cgi?id=42833 */ 684 .callback = video_detect_force_native, 685 /* Acer Extensa 5235 */ 686 .matches = { 687 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 688 DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"), 689 }, 690 }, 691 { 692 .callback = video_detect_force_native, 693 /* Acer TravelMate 4750 */ 694 .matches = { 695 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 696 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"), 697 }, 698 }, 699 { 700 /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */ 701 .callback = video_detect_force_native, 702 /* Acer TravelMate 5735Z */ 703 .matches = { 704 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 705 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"), 706 DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"), 707 }, 708 }, 709 { 710 /* https://bugzilla.kernel.org/show_bug.cgi?id=36322 */ 711 .callback = video_detect_force_native, 712 /* Acer TravelMate 5760 */ 713 .matches = { 714 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 715 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"), 716 }, 717 }, 718 { 719 .callback = video_detect_force_native, 720 /* ASUSTeK COMPUTER INC. GA401 */ 721 .matches = { 722 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 723 DMI_MATCH(DMI_PRODUCT_NAME, "GA401"), 724 }, 725 }, 726 { 727 .callback = video_detect_force_native, 728 /* ASUSTeK COMPUTER INC. GA502 */ 729 .matches = { 730 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 731 DMI_MATCH(DMI_PRODUCT_NAME, "GA502"), 732 }, 733 }, 734 { 735 .callback = video_detect_force_native, 736 /* ASUSTeK COMPUTER INC. GA503 */ 737 .matches = { 738 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 739 DMI_MATCH(DMI_PRODUCT_NAME, "GA503"), 740 }, 741 }, 742 { 743 .callback = video_detect_force_native, 744 /* Asus U46E */ 745 .matches = { 746 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 747 DMI_MATCH(DMI_PRODUCT_NAME, "U46E"), 748 }, 749 }, 750 { 751 .callback = video_detect_force_native, 752 /* Asus UX303UB */ 753 .matches = { 754 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 755 DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"), 756 }, 757 }, 758 { 759 .callback = video_detect_force_native, 760 /* HP EliteBook 8460p */ 761 .matches = { 762 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 763 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8460p"), 764 }, 765 }, 766 { 767 .callback = video_detect_force_native, 768 /* HP Pavilion g6-1d80nr / B4U19UA */ 769 .matches = { 770 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 771 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), 772 DMI_MATCH(DMI_PRODUCT_SKU, "B4U19UA"), 773 }, 774 }, 775 { 776 .callback = video_detect_force_native, 777 /* Samsung N150P */ 778 .matches = { 779 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 780 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"), 781 DMI_MATCH(DMI_BOARD_NAME, "N150P"), 782 }, 783 }, 784 { 785 .callback = video_detect_force_native, 786 /* Samsung N145P/N250P/N260P */ 787 .matches = { 788 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 789 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"), 790 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"), 791 }, 792 }, 793 { 794 .callback = video_detect_force_native, 795 /* Samsung N250P */ 796 .matches = { 797 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 798 DMI_MATCH(DMI_PRODUCT_NAME, "N250P"), 799 DMI_MATCH(DMI_BOARD_NAME, "N250P"), 800 }, 801 }, 802 { 803 /* https://bugzilla.kernel.org/show_bug.cgi?id=202401 */ 804 .callback = video_detect_force_native, 805 /* Sony Vaio VPCEH3U1E */ 806 .matches = { 807 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 808 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"), 809 }, 810 }, 811 { 812 .callback = video_detect_force_native, 813 /* Sony Vaio VPCY11S1E */ 814 .matches = { 815 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 816 DMI_MATCH(DMI_PRODUCT_NAME, "VPCY11S1E"), 817 }, 818 }, 819 820 /* 821 * These Toshibas have a broken acpi-video interface for brightness 822 * control. They also have an issue where the panel is off after 823 * suspend until a special firmware call is made to turn it back 824 * on. This is handled by the toshiba_acpi kernel module, so that 825 * module must be enabled for these models to work correctly. 826 */ 827 { 828 /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ 829 .callback = video_detect_force_native, 830 /* Toshiba Portégé R700 */ 831 .matches = { 832 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 833 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"), 834 }, 835 }, 836 { 837 /* Portégé: https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ 838 /* Satellite: https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ 839 .callback = video_detect_force_native, 840 /* Toshiba Satellite/Portégé R830 */ 841 .matches = { 842 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 843 DMI_MATCH(DMI_PRODUCT_NAME, "R830"), 844 }, 845 }, 846 { 847 .callback = video_detect_force_native, 848 /* Toshiba Satellite/Portégé Z830 */ 849 .matches = { 850 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 851 DMI_MATCH(DMI_PRODUCT_NAME, "Z830"), 852 }, 853 }, 854 855 /* 856 * Dell AIO (All in Ones) which advertise an UART attached backlight 857 * controller board in their ACPI tables (and may even have one), but 858 * which need native backlight control nevertheless. 859 */ 860 { 861 /* https://github.com/zabbly/linux/issues/26 */ 862 .callback = video_detect_force_native, 863 /* Dell OptiPlex 5480 AIO */ 864 .matches = { 865 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 866 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 5480 AIO"), 867 }, 868 }, 869 { 870 /* https://bugzilla.redhat.com/show_bug.cgi?id=2303936 */ 871 .callback = video_detect_force_native, 872 /* Dell OptiPlex 7760 AIO */ 873 .matches = { 874 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 875 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7760 AIO"), 876 }, 877 }, 878 { 879 .callback = video_detect_force_native, 880 /* Dell OptiPlex 7770 AIO */ 881 .matches = { 882 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 883 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7770 AIO"), 884 }, 885 }, 886 887 /* 888 * Models which have nvidia-ec-wmi support, but should not use it. 889 * Note this indicates a likely firmware bug on these models and should 890 * be revisited if/when Linux gets support for dynamic mux mode. 891 */ 892 { 893 .callback = video_detect_force_native, 894 /* Dell G15 5515 */ 895 .matches = { 896 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 897 DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5515"), 898 }, 899 }, 900 { 901 .callback = video_detect_force_native, 902 .matches = { 903 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 904 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 15 3535"), 905 }, 906 }, 907 { 908 /* https://gitlab.freedesktop.org/drm/amd/-/issues/4512 */ 909 .callback = video_detect_force_native, 910 /* Lenovo Legion S7 15ACH6 */ 911 .matches = { 912 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 913 DMI_MATCH(DMI_PRODUCT_NAME, "82K8"), 914 }, 915 }, 916 { 917 .callback = video_detect_force_native, 918 /* HP OMEN Gaming Laptop 16-n0xxx */ 919 .matches = { 920 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 921 DMI_MATCH(DMI_PRODUCT_NAME, "OMEN by HP Gaming Laptop 16-n0xxx"), 922 }, 923 }, 924 { 925 .callback = video_detect_force_native, 926 /* Acer Nitro AN515-46 */ 927 .matches = { 928 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 929 DMI_MATCH(DMI_PRODUCT_NAME, "Nitro AN515-46"), 930 }, 931 }, 932 933 /* 934 * x86 android tablets which directly control the backlight through 935 * an external backlight controller, typically TI's LP8557. 936 * The backlight is directly controlled by the lp855x driver on these. 937 * This setup means that neither i915's native nor acpi_video backlight 938 * control works. Add a "vendor" quirk to disable both. Note these 939 * devices do not use vendor control in the typical meaning of 940 * vendor specific SMBIOS or ACPI calls being used. 941 */ 942 { 943 .callback = video_detect_force_vendor, 944 /* Lenovo Yoga Book X90F / X90L */ 945 .matches = { 946 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), 947 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), 948 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"), 949 }, 950 }, 951 { 952 .callback = video_detect_force_vendor, 953 /* 954 * Lenovo Yoga Tablet 2 830F/L or 1050F/L (The 8" and 10" 955 * Lenovo Yoga Tablet 2 use the same mainboard) 956 */ 957 .matches = { 958 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."), 959 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"), 960 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), 961 /* Partial match on beginning of BIOS version */ 962 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"), 963 }, 964 }, 965 { 966 .callback = video_detect_force_vendor, 967 /* Lenovo Yoga Tab 3 Pro YT3-X90F */ 968 .matches = { 969 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), 970 DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"), 971 }, 972 }, 973 { 974 .callback = video_detect_force_vendor, 975 /* Xiaomi Mi Pad 2 */ 976 .matches = { 977 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"), 978 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"), 979 }, 980 }, 981 { }, 982 }; 983 984 static bool google_cros_ec_present(void) 985 { 986 return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C"); 987 } 988 989 /* 990 * Windows 8 and newer no longer use the ACPI video interface, so it often 991 * does not work. So on win8+ systems prefer native brightness control. 992 * Chromebooks should always prefer native backlight control. 993 */ 994 static bool prefer_native_over_acpi_video(void) 995 { 996 return acpi_osi_is_win8() || google_cros_ec_present(); 997 } 998 999 /* 1000 * Determine which type of backlight interface to use on this system, 1001 * First check cmdline, then dmi quirks, then do autodetect. 1002 */ 1003 enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto_detect) 1004 { 1005 static DEFINE_MUTEX(init_mutex); 1006 static bool nvidia_wmi_ec_present; 1007 static bool apple_gmux_present; 1008 static bool dell_uart_present; 1009 static bool native_available; 1010 static bool init_done; 1011 static long video_caps; 1012 1013 /* Parse cmdline, dmi and acpi only once */ 1014 mutex_lock(&init_mutex); 1015 if (!init_done) { 1016 acpi_video_parse_cmdline(); 1017 dmi_check_system(video_detect_dmi_table); 1018 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 1019 ACPI_UINT32_MAX, find_video, NULL, 1020 &video_caps, NULL); 1021 nvidia_wmi_ec_present = nvidia_wmi_ec_supported(); 1022 apple_gmux_present = apple_gmux_detect(NULL, NULL); 1023 dell_uart_present = acpi_dev_present("DELL0501", NULL, -1); 1024 init_done = true; 1025 } 1026 if (native) 1027 native_available = true; 1028 mutex_unlock(&init_mutex); 1029 1030 if (auto_detect) 1031 *auto_detect = false; 1032 1033 /* 1034 * The below heuristics / detection steps are in order of descending 1035 * presedence. The commandline takes presedence over anything else. 1036 */ 1037 if (acpi_backlight_cmdline != acpi_backlight_undef) 1038 return acpi_backlight_cmdline; 1039 1040 /* DMI quirks override any autodetection. */ 1041 if (acpi_backlight_dmi != acpi_backlight_undef) 1042 return acpi_backlight_dmi; 1043 1044 if (auto_detect) 1045 *auto_detect = true; 1046 1047 /* Special cases such as nvidia_wmi_ec and apple gmux. */ 1048 if (nvidia_wmi_ec_present) 1049 return acpi_backlight_nvidia_wmi_ec; 1050 1051 if (apple_gmux_present) 1052 return acpi_backlight_apple_gmux; 1053 1054 if (dell_uart_present) 1055 return acpi_backlight_dell_uart; 1056 1057 /* Use ACPI video if available, except when native should be preferred. */ 1058 if ((video_caps & ACPI_VIDEO_BACKLIGHT) && 1059 !(native_available && prefer_native_over_acpi_video())) 1060 return acpi_backlight_video; 1061 1062 /* Use native if available */ 1063 if (native_available) 1064 return acpi_backlight_native; 1065 1066 /* 1067 * The vendor specific BIOS interfaces are only necessary for 1068 * laptops from before ~2008. 1069 * 1070 * For laptops from ~2008 till ~2023 this point is never reached 1071 * because on those (video_caps & ACPI_VIDEO_BACKLIGHT) above is true. 1072 * 1073 * Laptops from after ~2023 no longer support ACPI_VIDEO_BACKLIGHT, 1074 * if this point is reached on those, this likely means that 1075 * the GPU kms driver which sets native_available has not loaded yet. 1076 * 1077 * Returning acpi_backlight_vendor in this case is known to sometimes 1078 * cause a non working vendor specific /sys/class/backlight device to 1079 * get registered. 1080 * 1081 * Return acpi_backlight_none on laptops with ACPI tables written 1082 * for Windows 8 (laptops from after ~2012) to avoid this problem. 1083 */ 1084 if (acpi_osi_is_win8()) 1085 return acpi_backlight_none; 1086 1087 /* No ACPI video/native (old hw), use vendor specific fw methods. */ 1088 return acpi_backlight_vendor; 1089 } 1090 EXPORT_SYMBOL(__acpi_video_get_backlight_type); 1091