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
acpi_video_parse_cmdline(void)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
find_video(acpi_handle handle,u32 lvl,void * context,void ** rv)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
nvidia_wmi_ec_supported(void)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
nvidia_wmi_ec_supported(void)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 */
video_detect_force_vendor(const struct dmi_system_id * d)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
video_detect_force_video(const struct dmi_system_id * d)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
video_detect_force_native(const struct dmi_system_id * d)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
video_detect_portege_r100(const struct dmi_system_id * d)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 /*
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 Slim 7 16ARH7 */
511 .matches = {
512 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
513 DMI_MATCH(DMI_PRODUCT_NAME, "82UX"),
514 },
515 },
516 {
517 .callback = video_detect_force_native,
518 /* Lenovo ThinkPad X131e (3371 AMD version) */
519 .matches = {
520 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
521 DMI_MATCH(DMI_PRODUCT_NAME, "3371"),
522 },
523 },
524 {
525 .callback = video_detect_force_native,
526 /* Apple iMac11,3 */
527 .matches = {
528 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
529 DMI_MATCH(DMI_PRODUCT_NAME, "iMac11,3"),
530 },
531 },
532 {
533 /* https://gitlab.freedesktop.org/drm/amd/-/issues/1838 */
534 .callback = video_detect_force_native,
535 /* Apple iMac12,1 */
536 .matches = {
537 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
538 DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,1"),
539 },
540 },
541 {
542 /* https://gitlab.freedesktop.org/drm/amd/-/issues/2753 */
543 .callback = video_detect_force_native,
544 /* Apple iMac12,2 */
545 .matches = {
546 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
547 DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,2"),
548 },
549 },
550 {
551 /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
552 .callback = video_detect_force_native,
553 /* Apple MacBook Pro 12,1 */
554 .matches = {
555 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
556 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
557 },
558 },
559 {
560 .callback = video_detect_force_native,
561 /* Dell Inspiron N4010 */
562 .matches = {
563 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
564 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N4010"),
565 },
566 },
567 {
568 .callback = video_detect_force_native,
569 /* Dell Vostro V131 */
570 .matches = {
571 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
572 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
573 },
574 },
575 {
576 /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */
577 .callback = video_detect_force_native,
578 /* Dell XPS 17 L702X */
579 .matches = {
580 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
581 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
582 },
583 },
584 {
585 .callback = video_detect_force_native,
586 /* Dell Precision 7510 */
587 .matches = {
588 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
589 DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
590 },
591 },
592 {
593 .callback = video_detect_force_native,
594 /* Dell Studio 1569 */
595 .matches = {
596 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
597 DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1569"),
598 },
599 },
600 {
601 .callback = video_detect_force_native,
602 /* Acer Aspire 3830TG */
603 .matches = {
604 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
605 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3830TG"),
606 },
607 },
608 {
609 .callback = video_detect_force_native,
610 /* Acer Aspire 4810T */
611 .matches = {
612 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
613 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"),
614 },
615 },
616 {
617 .callback = video_detect_force_native,
618 /* Acer Aspire 5738z */
619 .matches = {
620 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
621 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"),
622 DMI_MATCH(DMI_BOARD_NAME, "JV50"),
623 },
624 },
625 {
626 /* https://bugzilla.redhat.com/show_bug.cgi?id=1012674 */
627 .callback = video_detect_force_native,
628 /* Acer Aspire 5741 */
629 .matches = {
630 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
631 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"),
632 },
633 },
634 {
635 /* https://bugzilla.kernel.org/show_bug.cgi?id=42993 */
636 .callback = video_detect_force_native,
637 /* Acer Aspire 5750 */
638 .matches = {
639 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
640 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"),
641 },
642 },
643 {
644 /* https://bugzilla.kernel.org/show_bug.cgi?id=42833 */
645 .callback = video_detect_force_native,
646 /* Acer Extensa 5235 */
647 .matches = {
648 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
649 DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"),
650 },
651 },
652 {
653 .callback = video_detect_force_native,
654 /* Acer TravelMate 4750 */
655 .matches = {
656 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
657 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"),
658 },
659 },
660 {
661 /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */
662 .callback = video_detect_force_native,
663 /* Acer TravelMate 5735Z */
664 .matches = {
665 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
666 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"),
667 DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"),
668 },
669 },
670 {
671 /* https://bugzilla.kernel.org/show_bug.cgi?id=36322 */
672 .callback = video_detect_force_native,
673 /* Acer TravelMate 5760 */
674 .matches = {
675 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
676 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"),
677 },
678 },
679 {
680 .callback = video_detect_force_native,
681 /* ASUSTeK COMPUTER INC. GA401 */
682 .matches = {
683 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
684 DMI_MATCH(DMI_PRODUCT_NAME, "GA401"),
685 },
686 },
687 {
688 .callback = video_detect_force_native,
689 /* ASUSTeK COMPUTER INC. GA502 */
690 .matches = {
691 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
692 DMI_MATCH(DMI_PRODUCT_NAME, "GA502"),
693 },
694 },
695 {
696 .callback = video_detect_force_native,
697 /* ASUSTeK COMPUTER INC. GA503 */
698 .matches = {
699 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
700 DMI_MATCH(DMI_PRODUCT_NAME, "GA503"),
701 },
702 },
703 {
704 .callback = video_detect_force_native,
705 /* Asus U46E */
706 .matches = {
707 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
708 DMI_MATCH(DMI_PRODUCT_NAME, "U46E"),
709 },
710 },
711 {
712 .callback = video_detect_force_native,
713 /* Asus UX303UB */
714 .matches = {
715 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
716 DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"),
717 },
718 },
719 {
720 .callback = video_detect_force_native,
721 /* HP EliteBook 8460p */
722 .matches = {
723 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
724 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8460p"),
725 },
726 },
727 {
728 .callback = video_detect_force_native,
729 /* HP Pavilion g6-1d80nr / B4U19UA */
730 .matches = {
731 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
732 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"),
733 DMI_MATCH(DMI_PRODUCT_SKU, "B4U19UA"),
734 },
735 },
736 {
737 .callback = video_detect_force_native,
738 /* Samsung N150P */
739 .matches = {
740 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
741 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
742 DMI_MATCH(DMI_BOARD_NAME, "N150P"),
743 },
744 },
745 {
746 .callback = video_detect_force_native,
747 /* Samsung N145P/N250P/N260P */
748 .matches = {
749 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
750 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
751 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
752 },
753 },
754 {
755 .callback = video_detect_force_native,
756 /* Samsung N250P */
757 .matches = {
758 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
759 DMI_MATCH(DMI_PRODUCT_NAME, "N250P"),
760 DMI_MATCH(DMI_BOARD_NAME, "N250P"),
761 },
762 },
763 {
764 /* https://bugzilla.kernel.org/show_bug.cgi?id=202401 */
765 .callback = video_detect_force_native,
766 /* Sony Vaio VPCEH3U1E */
767 .matches = {
768 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
769 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"),
770 },
771 },
772 {
773 .callback = video_detect_force_native,
774 /* Sony Vaio VPCY11S1E */
775 .matches = {
776 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
777 DMI_MATCH(DMI_PRODUCT_NAME, "VPCY11S1E"),
778 },
779 },
780
781 /*
782 * These Toshibas have a broken acpi-video interface for brightness
783 * control. They also have an issue where the panel is off after
784 * suspend until a special firmware call is made to turn it back
785 * on. This is handled by the toshiba_acpi kernel module, so that
786 * module must be enabled for these models to work correctly.
787 */
788 {
789 /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */
790 .callback = video_detect_force_native,
791 /* Toshiba Portégé R700 */
792 .matches = {
793 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
794 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"),
795 },
796 },
797 {
798 /* Portégé: https://bugs.freedesktop.org/show_bug.cgi?id=82634 */
799 /* Satellite: https://bugzilla.kernel.org/show_bug.cgi?id=21012 */
800 .callback = video_detect_force_native,
801 /* Toshiba Satellite/Portégé R830 */
802 .matches = {
803 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
804 DMI_MATCH(DMI_PRODUCT_NAME, "R830"),
805 },
806 },
807 {
808 .callback = video_detect_force_native,
809 /* Toshiba Satellite/Portégé Z830 */
810 .matches = {
811 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
812 DMI_MATCH(DMI_PRODUCT_NAME, "Z830"),
813 },
814 },
815
816 /*
817 * Models which have nvidia-ec-wmi support, but should not use it.
818 * Note this indicates a likely firmware bug on these models and should
819 * be revisited if/when Linux gets support for dynamic mux mode.
820 */
821 {
822 .callback = video_detect_force_native,
823 /* Dell G15 5515 */
824 .matches = {
825 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
826 DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5515"),
827 },
828 },
829 {
830 .callback = video_detect_force_native,
831 .matches = {
832 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
833 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 15 3535"),
834 },
835 },
836 { },
837 };
838
google_cros_ec_present(void)839 static bool google_cros_ec_present(void)
840 {
841 return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C");
842 }
843
844 /*
845 * Windows 8 and newer no longer use the ACPI video interface, so it often
846 * does not work. So on win8+ systems prefer native brightness control.
847 * Chromebooks should always prefer native backlight control.
848 */
prefer_native_over_acpi_video(void)849 static bool prefer_native_over_acpi_video(void)
850 {
851 return acpi_osi_is_win8() || google_cros_ec_present();
852 }
853
854 /*
855 * Determine which type of backlight interface to use on this system,
856 * First check cmdline, then dmi quirks, then do autodetect.
857 */
__acpi_video_get_backlight_type(bool native,bool * auto_detect)858 enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto_detect)
859 {
860 static DEFINE_MUTEX(init_mutex);
861 static bool nvidia_wmi_ec_present;
862 static bool apple_gmux_present;
863 static bool native_available;
864 static bool init_done;
865 static long video_caps;
866
867 /* Parse cmdline, dmi and acpi only once */
868 mutex_lock(&init_mutex);
869 if (!init_done) {
870 acpi_video_parse_cmdline();
871 dmi_check_system(video_detect_dmi_table);
872 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
873 ACPI_UINT32_MAX, find_video, NULL,
874 &video_caps, NULL);
875 nvidia_wmi_ec_present = nvidia_wmi_ec_supported();
876 apple_gmux_present = apple_gmux_detect(NULL, NULL);
877 init_done = true;
878 }
879 if (native)
880 native_available = true;
881 mutex_unlock(&init_mutex);
882
883 if (auto_detect)
884 *auto_detect = false;
885
886 /*
887 * The below heuristics / detection steps are in order of descending
888 * presedence. The commandline takes presedence over anything else.
889 */
890 if (acpi_backlight_cmdline != acpi_backlight_undef)
891 return acpi_backlight_cmdline;
892
893 /* DMI quirks override any autodetection. */
894 if (acpi_backlight_dmi != acpi_backlight_undef)
895 return acpi_backlight_dmi;
896
897 if (auto_detect)
898 *auto_detect = true;
899
900 /* Special cases such as nvidia_wmi_ec and apple gmux. */
901 if (nvidia_wmi_ec_present)
902 return acpi_backlight_nvidia_wmi_ec;
903
904 if (apple_gmux_present)
905 return acpi_backlight_apple_gmux;
906
907 /* Use ACPI video if available, except when native should be preferred. */
908 if ((video_caps & ACPI_VIDEO_BACKLIGHT) &&
909 !(native_available && prefer_native_over_acpi_video()))
910 return acpi_backlight_video;
911
912 /* Use native if available */
913 if (native_available)
914 return acpi_backlight_native;
915
916 /*
917 * The vendor specific BIOS interfaces are only necessary for
918 * laptops from before ~2008.
919 *
920 * For laptops from ~2008 till ~2023 this point is never reached
921 * because on those (video_caps & ACPI_VIDEO_BACKLIGHT) above is true.
922 *
923 * Laptops from after ~2023 no longer support ACPI_VIDEO_BACKLIGHT,
924 * if this point is reached on those, this likely means that
925 * the GPU kms driver which sets native_available has not loaded yet.
926 *
927 * Returning acpi_backlight_vendor in this case is known to sometimes
928 * cause a non working vendor specific /sys/class/backlight device to
929 * get registered.
930 *
931 * Return acpi_backlight_none on laptops with ACPI tables written
932 * for Windows 8 (laptops from after ~2012) to avoid this problem.
933 */
934 if (acpi_osi_is_win8())
935 return acpi_backlight_none;
936
937 /* No ACPI video/native (old hw), use vendor specific fw methods. */
938 return acpi_backlight_vendor;
939 }
940 EXPORT_SYMBOL(__acpi_video_get_backlight_type);
941