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 /*
244 * Models which should use the vendor backlight interface,
245 * because of broken native backlight control.
246 */
247 {
248 .callback = video_detect_force_vendor,
249 /* Sony Vaio PCG-FRV35 */
250 .matches = {
251 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
252 DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"),
253 },
254 },
255
256 /*
257 * Toshiba models with Transflective display, these need to use
258 * the toshiba_acpi vendor driver for proper Transflective handling.
259 */
260 {
261 .callback = video_detect_force_vendor,
262 .matches = {
263 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
264 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R500"),
265 },
266 },
267 {
268 .callback = video_detect_force_vendor,
269 .matches = {
270 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
271 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R600"),
272 },
273 },
274
275 /*
276 * Toshiba Portégé R100 has working both acpi_video and toshiba_acpi
277 * vendor driver. But none of them gets activated as it has a VGA with
278 * no kernel driver (Trident CyberBlade XP4m32).
279 * The DMI strings are generic so check for the VGA chip in callback.
280 */
281 {
282 .callback = video_detect_portege_r100,
283 .matches = {
284 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
285 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
286 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
287 DMI_MATCH(DMI_BOARD_NAME, "Portable PC")
288 },
289 },
290
291 /*
292 * Models which need acpi_video backlight control where the GPU drivers
293 * do not call acpi_video_register_backlight() because no internal panel
294 * is detected. Typically these are all-in-ones (monitors with builtin
295 * PC) where the panel connection shows up as regular DP instead of eDP.
296 */
297 {
298 .callback = video_detect_force_video,
299 /* Apple iMac14,1 */
300 .matches = {
301 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
302 DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,1"),
303 },
304 },
305 {
306 .callback = video_detect_force_video,
307 /* Apple iMac14,2 */
308 .matches = {
309 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
310 DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,2"),
311 },
312 },
313
314 /*
315 * These models have a working acpi_video backlight control, and using
316 * native backlight causes a regression where backlight does not work
317 * when userspace is not handling brightness key events. Disable
318 * native_backlight on these to fix this:
319 * https://bugzilla.kernel.org/show_bug.cgi?id=81691
320 */
321 {
322 .callback = video_detect_force_video,
323 /* ThinkPad T420 */
324 .matches = {
325 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
326 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
327 },
328 },
329 {
330 .callback = video_detect_force_video,
331 /* ThinkPad T520 */
332 .matches = {
333 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
334 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"),
335 },
336 },
337 {
338 .callback = video_detect_force_video,
339 /* ThinkPad X201s */
340 .matches = {
341 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
342 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
343 },
344 },
345 {
346 .callback = video_detect_force_video,
347 /* ThinkPad X201T */
348 .matches = {
349 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
350 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"),
351 },
352 },
353
354 /* The native backlight controls do not work on some older machines */
355 {
356 /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */
357 .callback = video_detect_force_video,
358 /* HP ENVY 15 Notebook */
359 .matches = {
360 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
361 DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"),
362 },
363 },
364 {
365 .callback = video_detect_force_video,
366 /* SAMSUNG 870Z5E/880Z5E/680Z5E */
367 .matches = {
368 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
369 DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"),
370 },
371 },
372 {
373 .callback = video_detect_force_video,
374 /* SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V */
375 .matches = {
376 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
377 DMI_MATCH(DMI_PRODUCT_NAME,
378 "370R4E/370R4V/370R5E/3570RE/370R5V"),
379 },
380 },
381 {
382 /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
383 .callback = video_detect_force_video,
384 /* SAMSUNG 3570R/370R/470R/450R/510R/4450RV */
385 .matches = {
386 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
387 DMI_MATCH(DMI_PRODUCT_NAME,
388 "3570R/370R/470R/450R/510R/4450RV"),
389 },
390 },
391 {
392 /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */
393 .callback = video_detect_force_video,
394 /* SAMSUNG 670Z5E */
395 .matches = {
396 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
397 DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"),
398 },
399 },
400 {
401 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
402 .callback = video_detect_force_video,
403 /* SAMSUNG 730U3E/740U3E */
404 .matches = {
405 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
406 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
407 },
408 },
409 {
410 /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
411 .callback = video_detect_force_video,
412 /* SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D */
413 .matches = {
414 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
415 DMI_MATCH(DMI_PRODUCT_NAME,
416 "900X3C/900X3D/900X3E/900X4C/900X4D"),
417 },
418 },
419 {
420 /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */
421 .callback = video_detect_force_video,
422 /* Dell XPS14 L421X */
423 .matches = {
424 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
425 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"),
426 },
427 },
428 {
429 /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
430 .callback = video_detect_force_video,
431 /* Dell XPS15 L521X */
432 .matches = {
433 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
434 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
435 },
436 },
437 {
438 /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */
439 .callback = video_detect_force_video,
440 /* SAMSUNG 530U4E/540U4E */
441 .matches = {
442 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
443 DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
444 },
445 },
446 {
447 /* https://bugs.launchpad.net/bugs/1894667 */
448 .callback = video_detect_force_video,
449 /* HP 635 Notebook */
450 .matches = {
451 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
452 DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"),
453 },
454 },
455
456 /* Non win8 machines which need native backlight nevertheless */
457 {
458 /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */
459 .callback = video_detect_force_native,
460 /* Lenovo Ideapad S405 */
461 .matches = {
462 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
463 DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
464 },
465 },
466 {
467 /* https://bugzilla.suse.com/show_bug.cgi?id=1208724 */
468 .callback = video_detect_force_native,
469 /* Lenovo Ideapad Z470 */
470 .matches = {
471 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
472 DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad Z470"),
473 },
474 },
475 {
476 /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
477 .callback = video_detect_force_native,
478 /* Lenovo Ideapad Z570 */
479 .matches = {
480 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
481 DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"),
482 },
483 },
484 {
485 .callback = video_detect_force_native,
486 /* Lenovo E41-25 */
487 .matches = {
488 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
489 DMI_MATCH(DMI_PRODUCT_NAME, "81FS"),
490 },
491 },
492 {
493 .callback = video_detect_force_native,
494 /* Lenovo E41-45 */
495 .matches = {
496 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
497 DMI_MATCH(DMI_PRODUCT_NAME, "82BK"),
498 },
499 },
500 {
501 .callback = video_detect_force_native,
502 /* Lenovo Slim 7 16ARH7 */
503 .matches = {
504 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
505 DMI_MATCH(DMI_PRODUCT_NAME, "82UX"),
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 * x86 android tablets which directly control the backlight through
831 * an external backlight controller, typically TI's LP8557.
832 * The backlight is directly controlled by the lp855x driver on these.
833 * This setup means that neither i915's native nor acpi_video backlight
834 * control works. Add a "vendor" quirk to disable both. Note these
835 * devices do not use vendor control in the typical meaning of
836 * vendor specific SMBIOS or ACPI calls being used.
837 */
838 {
839 .callback = video_detect_force_vendor,
840 /* Lenovo Yoga Book X90F / X90L */
841 .matches = {
842 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
843 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
844 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"),
845 },
846 },
847 {
848 .callback = video_detect_force_vendor,
849 /*
850 * Lenovo Yoga Tablet 2 830F/L or 1050F/L (The 8" and 10"
851 * Lenovo Yoga Tablet 2 use the same mainboard)
852 */
853 .matches = {
854 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."),
855 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"),
856 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
857 /* Partial match on beginning of BIOS version */
858 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"),
859 },
860 },
861 {
862 .callback = video_detect_force_vendor,
863 /* Lenovo Yoga Tab 3 Pro YT3-X90F */
864 .matches = {
865 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
866 DMI_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
867 DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),
868 },
869 },
870 {
871 .callback = video_detect_force_vendor,
872 /* Xiaomi Mi Pad 2 */
873 .matches = {
874 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
875 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
876 },
877 },
878 { },
879 };
880
google_cros_ec_present(void)881 static bool google_cros_ec_present(void)
882 {
883 return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C");
884 }
885
886 /*
887 * Windows 8 and newer no longer use the ACPI video interface, so it often
888 * does not work. So on win8+ systems prefer native brightness control.
889 * Chromebooks should always prefer native backlight control.
890 */
prefer_native_over_acpi_video(void)891 static bool prefer_native_over_acpi_video(void)
892 {
893 return acpi_osi_is_win8() || google_cros_ec_present();
894 }
895
896 /*
897 * Determine which type of backlight interface to use on this system,
898 * First check cmdline, then dmi quirks, then do autodetect.
899 */
__acpi_video_get_backlight_type(bool native,bool * auto_detect)900 enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto_detect)
901 {
902 static DEFINE_MUTEX(init_mutex);
903 static bool nvidia_wmi_ec_present;
904 static bool apple_gmux_present;
905 static bool native_available;
906 static bool init_done;
907 static long video_caps;
908
909 /* Parse cmdline, dmi and acpi only once */
910 mutex_lock(&init_mutex);
911 if (!init_done) {
912 acpi_video_parse_cmdline();
913 dmi_check_system(video_detect_dmi_table);
914 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
915 ACPI_UINT32_MAX, find_video, NULL,
916 &video_caps, NULL);
917 nvidia_wmi_ec_present = nvidia_wmi_ec_supported();
918 apple_gmux_present = apple_gmux_detect(NULL, NULL);
919 init_done = true;
920 }
921 if (native)
922 native_available = true;
923 mutex_unlock(&init_mutex);
924
925 if (auto_detect)
926 *auto_detect = false;
927
928 /*
929 * The below heuristics / detection steps are in order of descending
930 * presedence. The commandline takes presedence over anything else.
931 */
932 if (acpi_backlight_cmdline != acpi_backlight_undef)
933 return acpi_backlight_cmdline;
934
935 /* DMI quirks override any autodetection. */
936 if (acpi_backlight_dmi != acpi_backlight_undef)
937 return acpi_backlight_dmi;
938
939 if (auto_detect)
940 *auto_detect = true;
941
942 /* Special cases such as nvidia_wmi_ec and apple gmux. */
943 if (nvidia_wmi_ec_present)
944 return acpi_backlight_nvidia_wmi_ec;
945
946 if (apple_gmux_present)
947 return acpi_backlight_apple_gmux;
948
949 /* Use ACPI video if available, except when native should be preferred. */
950 if ((video_caps & ACPI_VIDEO_BACKLIGHT) &&
951 !(native_available && prefer_native_over_acpi_video()))
952 return acpi_backlight_video;
953
954 /* Use native if available */
955 if (native_available)
956 return acpi_backlight_native;
957
958 /*
959 * The vendor specific BIOS interfaces are only necessary for
960 * laptops from before ~2008.
961 *
962 * For laptops from ~2008 till ~2023 this point is never reached
963 * because on those (video_caps & ACPI_VIDEO_BACKLIGHT) above is true.
964 *
965 * Laptops from after ~2023 no longer support ACPI_VIDEO_BACKLIGHT,
966 * if this point is reached on those, this likely means that
967 * the GPU kms driver which sets native_available has not loaded yet.
968 *
969 * Returning acpi_backlight_vendor in this case is known to sometimes
970 * cause a non working vendor specific /sys/class/backlight device to
971 * get registered.
972 *
973 * Return acpi_backlight_none on laptops with ACPI tables written
974 * for Windows 8 (laptops from after ~2012) to avoid this problem.
975 */
976 if (acpi_osi_is_win8())
977 return acpi_backlight_none;
978
979 /* No ACPI video/native (old hw), use vendor specific fw methods. */
980 return acpi_backlight_vendor;
981 }
982 EXPORT_SYMBOL(__acpi_video_get_backlight_type);
983