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