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