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 static bool apple_gmux_backlight_present(void) 114 { 115 struct acpi_device *adev; 116 struct device *dev; 117 118 adev = acpi_dev_get_first_match_dev(GMUX_ACPI_HID, NULL, -1); 119 if (!adev) 120 return false; 121 122 dev = acpi_get_first_physical_node(adev); 123 if (!dev) 124 return false; 125 126 /* 127 * drivers/platform/x86/apple-gmux.c only supports old style 128 * Apple GMUX with an IO-resource. 129 */ 130 return pnp_get_resource(to_pnp_dev(dev), IORESOURCE_IO, 0) != NULL; 131 } 132 133 /* Force to use vendor driver when the ACPI device is known to be 134 * buggy */ 135 static int video_detect_force_vendor(const struct dmi_system_id *d) 136 { 137 acpi_backlight_dmi = acpi_backlight_vendor; 138 return 0; 139 } 140 141 static int video_detect_force_video(const struct dmi_system_id *d) 142 { 143 acpi_backlight_dmi = acpi_backlight_video; 144 return 0; 145 } 146 147 static int video_detect_force_native(const struct dmi_system_id *d) 148 { 149 acpi_backlight_dmi = acpi_backlight_native; 150 return 0; 151 } 152 153 static int video_detect_force_none(const struct dmi_system_id *d) 154 { 155 acpi_backlight_dmi = acpi_backlight_none; 156 return 0; 157 } 158 159 static const struct dmi_system_id video_detect_dmi_table[] = { 160 /* 161 * Models which should use the vendor backlight interface, 162 * because of broken ACPI video backlight control. 163 */ 164 { 165 /* https://bugzilla.redhat.com/show_bug.cgi?id=1128309 */ 166 .callback = video_detect_force_vendor, 167 /* Acer KAV80 */ 168 .matches = { 169 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 170 DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"), 171 }, 172 }, 173 { 174 .callback = video_detect_force_vendor, 175 /* Asus UL30VT */ 176 .matches = { 177 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 178 DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"), 179 }, 180 }, 181 { 182 .callback = video_detect_force_vendor, 183 /* Asus UL30A */ 184 .matches = { 185 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 186 DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"), 187 }, 188 }, 189 { 190 .callback = video_detect_force_vendor, 191 /* Asus X55U */ 192 .matches = { 193 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 194 DMI_MATCH(DMI_PRODUCT_NAME, "X55U"), 195 }, 196 }, 197 { 198 /* https://bugs.launchpad.net/bugs/1000146 */ 199 .callback = video_detect_force_vendor, 200 /* Asus X101CH */ 201 .matches = { 202 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 203 DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"), 204 }, 205 }, 206 { 207 .callback = video_detect_force_vendor, 208 /* Asus X401U */ 209 .matches = { 210 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 211 DMI_MATCH(DMI_PRODUCT_NAME, "X401U"), 212 }, 213 }, 214 { 215 .callback = video_detect_force_vendor, 216 /* Asus X501U */ 217 .matches = { 218 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 219 DMI_MATCH(DMI_PRODUCT_NAME, "X501U"), 220 }, 221 }, 222 { 223 /* https://bugs.launchpad.net/bugs/1000146 */ 224 .callback = video_detect_force_vendor, 225 /* Asus 1015CX */ 226 .matches = { 227 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 228 DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"), 229 }, 230 }, 231 { 232 .callback = video_detect_force_vendor, 233 /* Samsung N150/N210/N220 */ 234 .matches = { 235 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 236 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"), 237 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"), 238 }, 239 }, 240 { 241 .callback = video_detect_force_vendor, 242 /* Samsung NF110/NF210/NF310 */ 243 .matches = { 244 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 245 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"), 246 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"), 247 }, 248 }, 249 { 250 .callback = video_detect_force_vendor, 251 /* Samsung NC210 */ 252 .matches = { 253 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 254 DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"), 255 DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"), 256 }, 257 }, 258 { 259 .callback = video_detect_force_vendor, 260 /* Xiaomi Mi Pad 2 */ 261 .matches = { 262 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"), 263 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"), 264 }, 265 }, 266 267 /* 268 * Models which should use the vendor backlight interface, 269 * because of broken native backlight control. 270 */ 271 { 272 .callback = video_detect_force_vendor, 273 /* Sony Vaio PCG-FRV35 */ 274 .matches = { 275 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 276 DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"), 277 }, 278 }, 279 280 /* 281 * Toshiba models with Transflective display, these need to use 282 * the toshiba_acpi vendor driver for proper Transflective handling. 283 */ 284 { 285 .callback = video_detect_force_vendor, 286 .matches = { 287 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 288 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R500"), 289 }, 290 }, 291 { 292 .callback = video_detect_force_vendor, 293 .matches = { 294 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 295 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R600"), 296 }, 297 }, 298 299 /* 300 * These models have a working acpi_video backlight control, and using 301 * native backlight causes a regression where backlight does not work 302 * when userspace is not handling brightness key events. Disable 303 * native_backlight on these to fix this: 304 * https://bugzilla.kernel.org/show_bug.cgi?id=81691 305 */ 306 { 307 .callback = video_detect_force_video, 308 /* ThinkPad T420 */ 309 .matches = { 310 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 311 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"), 312 }, 313 }, 314 { 315 .callback = video_detect_force_video, 316 /* ThinkPad T520 */ 317 .matches = { 318 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 319 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"), 320 }, 321 }, 322 { 323 .callback = video_detect_force_video, 324 /* ThinkPad X201s */ 325 .matches = { 326 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 327 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), 328 }, 329 }, 330 { 331 .callback = video_detect_force_video, 332 /* ThinkPad X201T */ 333 .matches = { 334 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 335 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"), 336 }, 337 }, 338 339 /* The native backlight controls do not work on some older machines */ 340 { 341 /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */ 342 .callback = video_detect_force_video, 343 /* HP ENVY 15 Notebook */ 344 .matches = { 345 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 346 DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"), 347 }, 348 }, 349 { 350 .callback = video_detect_force_video, 351 /* SAMSUNG 870Z5E/880Z5E/680Z5E */ 352 .matches = { 353 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 354 DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"), 355 }, 356 }, 357 { 358 .callback = video_detect_force_video, 359 /* SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V */ 360 .matches = { 361 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 362 DMI_MATCH(DMI_PRODUCT_NAME, 363 "370R4E/370R4V/370R5E/3570RE/370R5V"), 364 }, 365 }, 366 { 367 /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */ 368 .callback = video_detect_force_video, 369 /* SAMSUNG 3570R/370R/470R/450R/510R/4450RV */ 370 .matches = { 371 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 372 DMI_MATCH(DMI_PRODUCT_NAME, 373 "3570R/370R/470R/450R/510R/4450RV"), 374 }, 375 }, 376 { 377 /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */ 378 .callback = video_detect_force_video, 379 /* SAMSUNG 670Z5E */ 380 .matches = { 381 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 382 DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"), 383 }, 384 }, 385 { 386 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */ 387 .callback = video_detect_force_video, 388 /* SAMSUNG 730U3E/740U3E */ 389 .matches = { 390 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 391 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"), 392 }, 393 }, 394 { 395 /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */ 396 .callback = video_detect_force_video, 397 /* SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D */ 398 .matches = { 399 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 400 DMI_MATCH(DMI_PRODUCT_NAME, 401 "900X3C/900X3D/900X3E/900X4C/900X4D"), 402 }, 403 }, 404 { 405 /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */ 406 .callback = video_detect_force_video, 407 /* Dell XPS14 L421X */ 408 .matches = { 409 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 410 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), 411 }, 412 }, 413 { 414 /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */ 415 .callback = video_detect_force_video, 416 /* Dell XPS15 L521X */ 417 .matches = { 418 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 419 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), 420 }, 421 }, 422 { 423 /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */ 424 .callback = video_detect_force_video, 425 /* SAMSUNG 530U4E/540U4E */ 426 .matches = { 427 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 428 DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"), 429 }, 430 }, 431 { 432 /* https://bugs.launchpad.net/bugs/1894667 */ 433 .callback = video_detect_force_video, 434 /* HP 635 Notebook */ 435 .matches = { 436 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 437 DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"), 438 }, 439 }, 440 441 /* Non win8 machines which need native backlight nevertheless */ 442 { 443 /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */ 444 .callback = video_detect_force_native, 445 /* Lenovo Ideapad S405 */ 446 .matches = { 447 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 448 DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"), 449 }, 450 }, 451 { 452 /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */ 453 .callback = video_detect_force_native, 454 /* Lenovo Ideapad Z570 */ 455 .matches = { 456 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 457 DMI_MATCH(DMI_PRODUCT_NAME, "102434U"), 458 }, 459 }, 460 { 461 .callback = video_detect_force_native, 462 /* Lenovo E41-25 */ 463 .matches = { 464 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 465 DMI_MATCH(DMI_PRODUCT_NAME, "81FS"), 466 }, 467 }, 468 { 469 .callback = video_detect_force_native, 470 /* Lenovo E41-45 */ 471 .matches = { 472 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 473 DMI_MATCH(DMI_PRODUCT_NAME, "82BK"), 474 }, 475 }, 476 { 477 /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */ 478 .callback = video_detect_force_native, 479 /* Apple MacBook Pro 12,1 */ 480 .matches = { 481 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 482 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"), 483 }, 484 }, 485 { 486 .callback = video_detect_force_native, 487 /* Dell Inspiron N4010 */ 488 .matches = { 489 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 490 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N4010"), 491 }, 492 }, 493 { 494 .callback = video_detect_force_native, 495 /* Dell Vostro V131 */ 496 .matches = { 497 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 498 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), 499 }, 500 }, 501 { 502 /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */ 503 .callback = video_detect_force_native, 504 /* Dell XPS 17 L702X */ 505 .matches = { 506 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 507 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"), 508 }, 509 }, 510 { 511 .callback = video_detect_force_native, 512 /* Dell Precision 7510 */ 513 .matches = { 514 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 515 DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"), 516 }, 517 }, 518 { 519 .callback = video_detect_force_native, 520 /* Acer Aspire 4810T */ 521 .matches = { 522 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 523 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"), 524 }, 525 }, 526 { 527 .callback = video_detect_force_native, 528 /* Acer Aspire 5738z */ 529 .matches = { 530 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 531 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"), 532 DMI_MATCH(DMI_BOARD_NAME, "JV50"), 533 }, 534 }, 535 { 536 /* https://bugzilla.redhat.com/show_bug.cgi?id=1012674 */ 537 .callback = video_detect_force_native, 538 /* Acer Aspire 5741 */ 539 .matches = { 540 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 541 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"), 542 }, 543 }, 544 { 545 /* https://bugzilla.kernel.org/show_bug.cgi?id=42993 */ 546 .callback = video_detect_force_native, 547 /* Acer Aspire 5750 */ 548 .matches = { 549 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 550 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"), 551 }, 552 }, 553 { 554 /* https://bugzilla.kernel.org/show_bug.cgi?id=42833 */ 555 .callback = video_detect_force_native, 556 /* Acer Extensa 5235 */ 557 .matches = { 558 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 559 DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"), 560 }, 561 }, 562 { 563 .callback = video_detect_force_native, 564 /* Acer TravelMate 4750 */ 565 .matches = { 566 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 567 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"), 568 }, 569 }, 570 { 571 /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */ 572 .callback = video_detect_force_native, 573 /* Acer TravelMate 5735Z */ 574 .matches = { 575 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 576 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"), 577 DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"), 578 }, 579 }, 580 { 581 /* https://bugzilla.kernel.org/show_bug.cgi?id=36322 */ 582 .callback = video_detect_force_native, 583 /* Acer TravelMate 5760 */ 584 .matches = { 585 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), 586 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"), 587 }, 588 }, 589 { 590 .callback = video_detect_force_native, 591 /* ASUSTeK COMPUTER INC. GA401 */ 592 .matches = { 593 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 594 DMI_MATCH(DMI_PRODUCT_NAME, "GA401"), 595 }, 596 }, 597 { 598 .callback = video_detect_force_native, 599 /* ASUSTeK COMPUTER INC. GA502 */ 600 .matches = { 601 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 602 DMI_MATCH(DMI_PRODUCT_NAME, "GA502"), 603 }, 604 }, 605 { 606 .callback = video_detect_force_native, 607 /* ASUSTeK COMPUTER INC. GA503 */ 608 .matches = { 609 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 610 DMI_MATCH(DMI_PRODUCT_NAME, "GA503"), 611 }, 612 }, 613 { 614 .callback = video_detect_force_native, 615 /* Asus UX303UB */ 616 .matches = { 617 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 618 DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"), 619 }, 620 }, 621 { 622 .callback = video_detect_force_native, 623 /* Samsung N150P */ 624 .matches = { 625 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 626 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"), 627 DMI_MATCH(DMI_BOARD_NAME, "N150P"), 628 }, 629 }, 630 { 631 .callback = video_detect_force_native, 632 /* Samsung N145P/N250P/N260P */ 633 .matches = { 634 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 635 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"), 636 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"), 637 }, 638 }, 639 { 640 .callback = video_detect_force_native, 641 /* Samsung N250P */ 642 .matches = { 643 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), 644 DMI_MATCH(DMI_PRODUCT_NAME, "N250P"), 645 DMI_MATCH(DMI_BOARD_NAME, "N250P"), 646 }, 647 }, 648 { 649 /* https://bugzilla.kernel.org/show_bug.cgi?id=202401 */ 650 .callback = video_detect_force_native, 651 /* Sony Vaio VPCEH3U1E */ 652 .matches = { 653 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 654 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"), 655 }, 656 }, 657 { 658 .callback = video_detect_force_native, 659 /* Sony Vaio VPCY11S1E */ 660 .matches = { 661 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 662 DMI_MATCH(DMI_PRODUCT_NAME, "VPCY11S1E"), 663 }, 664 }, 665 666 /* 667 * These Toshibas have a broken acpi-video interface for brightness 668 * control. They also have an issue where the panel is off after 669 * suspend until a special firmware call is made to turn it back 670 * on. This is handled by the toshiba_acpi kernel module, so that 671 * module must be enabled for these models to work correctly. 672 */ 673 { 674 /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ 675 .callback = video_detect_force_native, 676 /* Toshiba Portégé R700 */ 677 .matches = { 678 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 679 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"), 680 }, 681 }, 682 { 683 /* Portégé: https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ 684 /* Satellite: https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ 685 .callback = video_detect_force_native, 686 /* Toshiba Satellite/Portégé R830 */ 687 .matches = { 688 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 689 DMI_MATCH(DMI_PRODUCT_NAME, "R830"), 690 }, 691 }, 692 { 693 .callback = video_detect_force_native, 694 /* Toshiba Satellite/Portégé Z830 */ 695 .matches = { 696 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 697 DMI_MATCH(DMI_PRODUCT_NAME, "Z830"), 698 }, 699 }, 700 701 /* 702 * Models which have nvidia-ec-wmi support, but should not use it. 703 * Note this indicates a likely firmware bug on these models and should 704 * be revisited if/when Linux gets support for dynamic mux mode. 705 */ 706 { 707 .callback = video_detect_force_native, 708 /* Dell G15 5515 */ 709 .matches = { 710 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 711 DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5515"), 712 }, 713 }, 714 715 /* 716 * Desktops which falsely report a backlight and which our heuristics 717 * for this do not catch. 718 */ 719 { 720 .callback = video_detect_force_none, 721 /* Dell OptiPlex 9020M */ 722 .matches = { 723 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 724 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"), 725 }, 726 }, 727 { 728 .callback = video_detect_force_none, 729 /* GIGABYTE GB-BXBT-2807 */ 730 .matches = { 731 DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), 732 DMI_MATCH(DMI_PRODUCT_NAME, "GB-BXBT-2807"), 733 }, 734 }, 735 { 736 .callback = video_detect_force_none, 737 /* MSI MS-7721 */ 738 .matches = { 739 DMI_MATCH(DMI_SYS_VENDOR, "MSI"), 740 DMI_MATCH(DMI_PRODUCT_NAME, "MS-7721"), 741 }, 742 }, 743 { }, 744 }; 745 746 static bool google_cros_ec_present(void) 747 { 748 return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C"); 749 } 750 751 /* 752 * Windows 8 and newer no longer use the ACPI video interface, so it often 753 * does not work. So on win8+ systems prefer native brightness control. 754 * Chromebooks should always prefer native backlight control. 755 */ 756 static bool prefer_native_over_acpi_video(void) 757 { 758 return acpi_osi_is_win8() || google_cros_ec_present(); 759 } 760 761 /* 762 * Determine which type of backlight interface to use on this system, 763 * First check cmdline, then dmi quirks, then do autodetect. 764 */ 765 static enum acpi_backlight_type __acpi_video_get_backlight_type(bool native) 766 { 767 static DEFINE_MUTEX(init_mutex); 768 static bool nvidia_wmi_ec_present; 769 static bool native_available; 770 static bool init_done; 771 static long video_caps; 772 773 /* Parse cmdline, dmi and acpi only once */ 774 mutex_lock(&init_mutex); 775 if (!init_done) { 776 acpi_video_parse_cmdline(); 777 dmi_check_system(video_detect_dmi_table); 778 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 779 ACPI_UINT32_MAX, find_video, NULL, 780 &video_caps, NULL); 781 nvidia_wmi_ec_present = nvidia_wmi_ec_supported(); 782 init_done = true; 783 } 784 if (native) 785 native_available = true; 786 mutex_unlock(&init_mutex); 787 788 /* 789 * The below heuristics / detection steps are in order of descending 790 * presedence. The commandline takes presedence over anything else. 791 */ 792 if (acpi_backlight_cmdline != acpi_backlight_undef) 793 return acpi_backlight_cmdline; 794 795 /* DMI quirks override any autodetection. */ 796 if (acpi_backlight_dmi != acpi_backlight_undef) 797 return acpi_backlight_dmi; 798 799 /* Special cases such as nvidia_wmi_ec and apple gmux. */ 800 if (nvidia_wmi_ec_present) 801 return acpi_backlight_nvidia_wmi_ec; 802 803 if (apple_gmux_backlight_present()) 804 return acpi_backlight_apple_gmux; 805 806 /* Use ACPI video if available, except when native should be preferred. */ 807 if ((video_caps & ACPI_VIDEO_BACKLIGHT) && 808 !(native_available && prefer_native_over_acpi_video())) 809 return acpi_backlight_video; 810 811 /* Use native if available */ 812 if (native_available) 813 return acpi_backlight_native; 814 815 /* No ACPI video/native (old hw), use vendor specific fw methods. */ 816 return acpi_backlight_vendor; 817 } 818 819 enum acpi_backlight_type acpi_video_get_backlight_type(void) 820 { 821 return __acpi_video_get_backlight_type(false); 822 } 823 EXPORT_SYMBOL(acpi_video_get_backlight_type); 824 825 bool acpi_video_backlight_use_native(void) 826 { 827 return __acpi_video_get_backlight_type(true) == acpi_backlight_native; 828 } 829 EXPORT_SYMBOL(acpi_video_backlight_use_native); 830