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 42static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef; 43static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef; 44 45static 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 61static acpi_status 62find_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 85static 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 107static 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 */ 115static int video_detect_force_vendor(const struct dmi_system_id *d) 116{ 117 acpi_backlight_dmi = acpi_backlight_vendor; 118 return 0; 119} 120 121static int video_detect_force_video(const struct dmi_system_id *d) 122{ 123 acpi_backlight_dmi = acpi_backlight_video; 124 return 0; 125} 126 127static int video_detect_force_native(const struct dmi_system_id *d) 128{ 129 acpi_backlight_dmi = acpi_backlight_native; 130 return 0; 131} 132 133static 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 143static 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 /* 265 * Toshiba models with Transflective display, these need to use 266 * the toshiba_acpi vendor driver for proper Transflective handling. 267 */ 268 { 269 .callback = video_detect_force_vendor, 270 .matches = { 271 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 272 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R500"), 273 }, 274 }, 275 { 276 .callback = video_detect_force_vendor, 277 .matches = { 278 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 279 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R600"), 280 }, 281 }, 282 283 /* 284 * Toshiba Portégé R100 has working both acpi_video and toshiba_acpi 285 * vendor driver. But none of them gets activated as it has a VGA with 286 * no kernel driver (Trident CyberBlade XP4m32). 287 * The DMI strings are generic so check for the VGA chip in callback. 288 */ 289 { 290 .callback = video_detect_portege_r100, 291 .matches = { 292 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 293 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 294 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 295 DMI_MATCH(DMI_BOARD_NAME, "Portable PC") 296 }, 297 }, 298 299 /* 300 * Models which need acpi_video backlight control where the GPU drivers 301 * do not call acpi_video_register_backlight() because no internal panel 302 * is detected. Typically these are all-in-ones (monitors with builtin 303 * PC) where the panel connection shows up as regular DP instead of eDP. 304 */ 305 { 306 .callback = video_detect_force_video, 307 /* Apple iMac14,1 */ 308 .matches = { 309 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 310 DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,1"), 311 }, 312 }, 313 { 314 .callback = video_detect_force_video, 315 /* Apple iMac14,2 */ 316 .matches = { 317 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 318 DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,2"), 319 }, 320 }, 321 322 /* 323 * These models have a working acpi_video backlight control, and using 324 * native backlight causes a regression where backlight does not work 325 * when userspace is not handling brightness key events. Disable 326 * native_backlight on these to fix this: 327 * https://bugzilla.kernel.org/show_bug.cgi?id=81691 328 */ 329 { 330 .callback = video_detect_force_video, 331 /* ThinkPad T420 */ 332 .matches = { 333 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 334 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"), 335 }, 336 }, 337 { 338 .callback = video_detect_force_video, 339 /* ThinkPad T520 */ 340 .matches = { 341 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 342 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"), 343 }, 344 }, 345 { 346 .callback = video_detect_force_video, 347 /* ThinkPad X201s */ 348 .matches = { 349 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 350 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), 351 }, 352 }, 353 { 354 .callback = video_detect_force_video, 355 /* ThinkPad X201T */ 356 .matches = { 357 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 358 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"), 359 }, 360 }, 361 362 /* The native backlight controls do not work on some older machines */ 363 { 364 /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */ 365 .callback = video_detect_force_video, 366 /* HP ENVY 15 Notebook */ 367 .matches = { 368 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 369 DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"), 370 }, 371 }, 372 { 373 .callback = video_detect_force_video, 374 /* SAMSUNG 870Z5E/880Z5E/680Z5E */ 375 .matches = { 376 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 377 DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"), 378 }, 379 }, 380 { 381 .callback = video_detect_force_video, 382 /* SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V */ 383 .matches = { 384 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 385 DMI_MATCH(DMI_PRODUCT_NAME, 386 "370R4E/370R4V/370R5E/3570RE/370R5V"), 387 }, 388 }, 389 { 390 /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */ 391 .callback = video_detect_force_video, 392 /* SAMSUNG 3570R/370R/470R/450R/510R/4450RV */ 393 .matches = { 394 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 395 DMI_MATCH(DMI_PRODUCT_NAME, 396 "3570R/370R/470R/450R/510R/4450RV"), 397 }, 398 }, 399 { 400 /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */ 401 .callback = video_detect_force_video, 402 /* SAMSUNG 670Z5E */ 403 .matches = { 404 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 405 DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"), 406 }, 407 }, 408 { 409 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */ 410 .callback = video_detect_force_video, 411 /* SAMSUNG 730U3E/740U3E */ 412 .matches = { 413 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 414 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"), 415 }, 416 }, 417 { 418 /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */ 419 .callback = video_detect_force_video, 420 /* SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D */ 421 .matches = { 422 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 423 DMI_MATCH(DMI_PRODUCT_NAME, 424 "900X3C/900X3D/900X3E/900X4C/900X4D"), 425 }, 426 }, 427 { 428 /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */ 429 .callback = video_detect_force_video, 430 /* Dell XPS14 L421X */ 431 .matches = { 432 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 433 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), 434 }, 435 }, 436 { 437 /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */ 438 .callback = video_detect_force_video, 439 /* Dell XPS15 L521X */ 440 .matches = { 441 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 442 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), 443 }, 444 }, 445 { 446 /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */ 447 .callback = video_detect_force_video, 448 /* SAMSUNG 530U4E/540U4E */ 449 .matches = { 450 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 451 DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"), 452 }, 453 }, 454 { 455 /* https://bugs.launchpad.net/bugs/1894667 */ 456 .callback = video_detect_force_video, 457 /* HP 635 Notebook */ 458 .matches = { 459 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 460 DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"), 461 }, 462 }, 463 464 /* Non win8 machines which need native backlight nevertheless */ 465 { 466 /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */ 467 .callback = video_detect_force_native, 468 /* Lenovo Ideapad S405 */ 469 .matches = { 470 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 471 DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"), 472 }, 473 }, 474 { 475 /* https://bugzilla.suse.com/show_bug.cgi?id=1208724 */ 476 .callback = video_detect_force_native, 477 /* Lenovo Ideapad Z470 */ 478 .matches = { 479 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 480 DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad Z470"), 481 }, 482 }, 483 { 484 /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */ 485 .callback = video_detect_force_native, 486 /* Lenovo Ideapad Z570 */ 487 .matches = { 488 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 489 DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"), 490 }, 491 }, 492 { 493 .callback = video_detect_force_native, 494 /* Lenovo E41-25 */ 495 .matches = { 496 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 497 DMI_MATCH(DMI_PRODUCT_NAME, "81FS"), 498 }, 499 }, 500 { 501 .callback = video_detect_force_native, 502 /* Lenovo E41-45 */ 503 .matches = { 504 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 505 DMI_MATCH(DMI_PRODUCT_NAME, "82BK"), 506 }, 507 }, 508 { 509 .callback = video_detect_force_native, 510 /* Lenovo ThinkPad X131e (3371 AMD version) */ 511 .matches = { 512 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 513 DMI_MATCH(DMI_PRODUCT_NAME, "3371"), 514 }, 515 }, 516 { 517 .callback = video_detect_force_native, 518 /* Apple iMac11,3 */ 519 .matches = { 520 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 521 DMI_MATCH(DMI_PRODUCT_NAME, "iMac11,3"), 522 }, 523 }, 524 { 525 /* https://gitlab.freedesktop.org/drm/amd/-/issues/1838 */ 526 .callback = video_detect_force_native, 527 /* Apple iMac12,1 */ 528 .matches = { 529 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 530 DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,1"), 531 }, 532 }, 533 { 534 /* https://gitlab.freedesktop.org/drm/amd/-/issues/2753 */ 535 .callback = video_detect_force_native, 536 /* Apple iMac12,2 */ 537 .matches = { 538 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 539 DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,2"), 540 }, 541 }, 542 { 543 /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */ 544 .callback = video_detect_force_native, 545 /* Apple MacBook Pro 12,1 */ 546 .matches = { 547 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 548 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"), 549 }, 550 }, 551 { 552 .callback = video_detect_force_native, 553 /* Dell Inspiron N4010 */ 554 .matches = { 555 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 556 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N4010"), 557 }, 558 }, 559 { 560 .callback = video_detect_force_native, 561 /* Dell Vostro V131 */ 562 .matches = { 563 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 564 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), 565 }, 566 }, 567 { 568 /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */ 569 .callback = video_detect_force_native, 570 /* Dell XPS 17 L702X */ 571 .matches = { 572 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 573 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"), 574 }, 575 }, 576 { 577 .callback = video_detect_force_native, 578 /* Dell Precision 7510 */ 579 .matches = { 580 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 581 DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"), 582 }, 583 }, 584 { 585 .callback = video_detect_force_native, 586 /* Dell Studio 1569 */ 587 .matches = { 588 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 589 DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1569"), 590 }, 591 }, 592 { 593 .callback = video_detect_force_native, 594 /* Acer Aspire 3830TG */ 595 .matches = { 596 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 597 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3830TG"), 598 }, 599 }, 600 { 601 .callback = video_detect_force_native, 602 /* Acer Aspire 4810T */ 603 .matches = { 604 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 605 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"), 606 }, 607 }, 608 { 609 .callback = video_detect_force_native, 610 /* Acer Aspire 5738z */ 611 .matches = { 612 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 613 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"), 614 DMI_MATCH(DMI_BOARD_NAME, "JV50"), 615 }, 616 }, 617 { 618 /* https://bugzilla.redhat.com/show_bug.cgi?id=1012674 */ 619 .callback = video_detect_force_native, 620 /* Acer Aspire 5741 */ 621 .matches = { 622 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 623 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"), 624 }, 625 }, 626 { 627 /* https://bugzilla.kernel.org/show_bug.cgi?id=42993 */ 628 .callback = video_detect_force_native, 629 /* Acer Aspire 5750 */ 630 .matches = { 631 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 632 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"), 633 }, 634 }, 635 { 636 /* https://bugzilla.kernel.org/show_bug.cgi?id=42833 */ 637 .callback = video_detect_force_native, 638 /* Acer Extensa 5235 */ 639 .matches = { 640 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 641 DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"), 642 }, 643 }, 644 { 645 .callback = video_detect_force_native, 646 /* Acer TravelMate 4750 */ 647 .matches = { 648 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 649 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"), 650 }, 651 }, 652 { 653 /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */ 654 .callback = video_detect_force_native, 655 /* Acer TravelMate 5735Z */ 656 .matches = { 657 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 658 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"), 659 DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"), 660 }, 661 }, 662 { 663 /* https://bugzilla.kernel.org/show_bug.cgi?id=36322 */ 664 .callback = video_detect_force_native, 665 /* Acer TravelMate 5760 */ 666 .matches = { 667 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 668 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"), 669 }, 670 }, 671 { 672 .callback = video_detect_force_native, 673 /* ASUSTeK COMPUTER INC. GA401 */ 674 .matches = { 675 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 676 DMI_MATCH(DMI_PRODUCT_NAME, "GA401"), 677 }, 678 }, 679 { 680 .callback = video_detect_force_native, 681 /* ASUSTeK COMPUTER INC. GA502 */ 682 .matches = { 683 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 684 DMI_MATCH(DMI_PRODUCT_NAME, "GA502"), 685 }, 686 }, 687 { 688 .callback = video_detect_force_native, 689 /* ASUSTeK COMPUTER INC. GA503 */ 690 .matches = { 691 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 692 DMI_MATCH(DMI_PRODUCT_NAME, "GA503"), 693 }, 694 }, 695 { 696 .callback = video_detect_force_native, 697 /* Asus U46E */ 698 .matches = { 699 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 700 DMI_MATCH(DMI_PRODUCT_NAME, "U46E"), 701 }, 702 }, 703 { 704 .callback = video_detect_force_native, 705 /* Asus UX303UB */ 706 .matches = { 707 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 708 DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"), 709 }, 710 }, 711 { 712 .callback = video_detect_force_native, 713 /* HP EliteBook 8460p */ 714 .matches = { 715 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 716 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8460p"), 717 }, 718 }, 719 { 720 .callback = video_detect_force_native, 721 /* HP Pavilion g6-1d80nr / B4U19UA */ 722 .matches = { 723 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 724 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), 725 DMI_MATCH(DMI_PRODUCT_SKU, "B4U19UA"), 726 }, 727 }, 728 { 729 .callback = video_detect_force_native, 730 /* Samsung N150P */ 731 .matches = { 732 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 733 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"), 734 DMI_MATCH(DMI_BOARD_NAME, "N150P"), 735 }, 736 }, 737 { 738 .callback = video_detect_force_native, 739 /* Samsung N145P/N250P/N260P */ 740 .matches = { 741 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 742 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"), 743 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"), 744 }, 745 }, 746 { 747 .callback = video_detect_force_native, 748 /* Samsung N250P */ 749 .matches = { 750 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 751 DMI_MATCH(DMI_PRODUCT_NAME, "N250P"), 752 DMI_MATCH(DMI_BOARD_NAME, "N250P"), 753 }, 754 }, 755 { 756 /* https://bugzilla.kernel.org/show_bug.cgi?id=202401 */ 757 .callback = video_detect_force_native, 758 /* Sony Vaio VPCEH3U1E */ 759 .matches = { 760 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 761 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"), 762 }, 763 }, 764 { 765 .callback = video_detect_force_native, 766 /* Sony Vaio VPCY11S1E */ 767 .matches = { 768 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 769 DMI_MATCH(DMI_PRODUCT_NAME, "VPCY11S1E"), 770 }, 771 }, 772 773 /* 774 * These Toshibas have a broken acpi-video interface for brightness 775 * control. They also have an issue where the panel is off after 776 * suspend until a special firmware call is made to turn it back 777 * on. This is handled by the toshiba_acpi kernel module, so that 778 * module must be enabled for these models to work correctly. 779 */ 780 { 781 /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ 782 .callback = video_detect_force_native, 783 /* Toshiba Portégé R700 */ 784 .matches = { 785 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 786 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"), 787 }, 788 }, 789 { 790 /* Portégé: https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ 791 /* Satellite: https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ 792 .callback = video_detect_force_native, 793 /* Toshiba Satellite/Portégé R830 */ 794 .matches = { 795 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 796 DMI_MATCH(DMI_PRODUCT_NAME, "R830"), 797 }, 798 }, 799 { 800 .callback = video_detect_force_native, 801 /* Toshiba Satellite/Portégé Z830 */ 802 .matches = { 803 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 804 DMI_MATCH(DMI_PRODUCT_NAME, "Z830"), 805 }, 806 }, 807 808 /* 809 * Models which have nvidia-ec-wmi support, but should not use it. 810 * Note this indicates a likely firmware bug on these models and should 811 * be revisited if/when Linux gets support for dynamic mux mode. 812 */ 813 { 814 .callback = video_detect_force_native, 815 /* Dell G15 5515 */ 816 .matches = { 817 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 818 DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5515"), 819 }, 820 }, 821 { 822 .callback = video_detect_force_native, 823 .matches = { 824 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 825 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 15 3535"), 826 }, 827 }, 828 { }, 829}; 830 831static bool google_cros_ec_present(void) 832{ 833 return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C"); 834} 835 836/* 837 * Windows 8 and newer no longer use the ACPI video interface, so it often 838 * does not work. So on win8+ systems prefer native brightness control. 839 * Chromebooks should always prefer native backlight control. 840 */ 841static bool prefer_native_over_acpi_video(void) 842{ 843 return acpi_osi_is_win8() || google_cros_ec_present(); 844} 845 846/* 847 * Determine which type of backlight interface to use on this system, 848 * First check cmdline, then dmi quirks, then do autodetect. 849 */ 850enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto_detect) 851{ 852 static DEFINE_MUTEX(init_mutex); 853 static bool nvidia_wmi_ec_present; 854 static bool apple_gmux_present; 855 static bool native_available; 856 static bool init_done; 857 static long video_caps; 858 859 /* Parse cmdline, dmi and acpi only once */ 860 mutex_lock(&init_mutex); 861 if (!init_done) { 862 acpi_video_parse_cmdline(); 863 dmi_check_system(video_detect_dmi_table); 864 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 865 ACPI_UINT32_MAX, find_video, NULL, 866 &video_caps, NULL); 867 nvidia_wmi_ec_present = nvidia_wmi_ec_supported(); 868 apple_gmux_present = apple_gmux_detect(NULL, NULL); 869 init_done = true; 870 } 871 if (native) 872 native_available = true; 873 mutex_unlock(&init_mutex); 874 875 if (auto_detect) 876 *auto_detect = false; 877 878 /* 879 * The below heuristics / detection steps are in order of descending 880 * presedence. The commandline takes presedence over anything else. 881 */ 882 if (acpi_backlight_cmdline != acpi_backlight_undef) 883 return acpi_backlight_cmdline; 884 885 /* DMI quirks override any autodetection. */ 886 if (acpi_backlight_dmi != acpi_backlight_undef) 887 return acpi_backlight_dmi; 888 889 if (auto_detect) 890 *auto_detect = true; 891 892 /* Special cases such as nvidia_wmi_ec and apple gmux. */ 893 if (nvidia_wmi_ec_present) 894 return acpi_backlight_nvidia_wmi_ec; 895 896 if (apple_gmux_present) 897 return acpi_backlight_apple_gmux; 898 899 /* Use ACPI video if available, except when native should be preferred. */ 900 if ((video_caps & ACPI_VIDEO_BACKLIGHT) && 901 !(native_available && prefer_native_over_acpi_video())) 902 return acpi_backlight_video; 903 904 /* Use native if available */ 905 if (native_available) 906 return acpi_backlight_native; 907 908 /* 909 * The vendor specific BIOS interfaces are only necessary for 910 * laptops from before ~2008. 911 * 912 * For laptops from ~2008 till ~2023 this point is never reached 913 * because on those (video_caps & ACPI_VIDEO_BACKLIGHT) above is true. 914 * 915 * Laptops from after ~2023 no longer support ACPI_VIDEO_BACKLIGHT, 916 * if this point is reached on those, this likely means that 917 * the GPU kms driver which sets native_available has not loaded yet. 918 * 919 * Returning acpi_backlight_vendor in this case is known to sometimes 920 * cause a non working vendor specific /sys/class/backlight device to 921 * get registered. 922 * 923 * Return acpi_backlight_none on laptops with ACPI tables written 924 * for Windows 8 (laptops from after ~2012) to avoid this problem. 925 */ 926 if (acpi_osi_is_win8()) 927 return acpi_backlight_none; 928 929 /* No ACPI video/native (old hw), use vendor specific fw methods. */ 930 return acpi_backlight_vendor; 931} 932EXPORT_SYMBOL(__acpi_video_get_backlight_type); 933