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Merge tag 'char-misc-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregk...
[linux-2.6-block.git] / drivers / acpi / video_detect.c
CommitLineData
c3d6de69 1/*
87521e16
HG		 2 * Copyright (C) 2015 Red Hat Inc.
3 * Hans de Goede <hdegoede@redhat.com>
c3d6de69
TR		 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:
c3d6de69 10 * After PCI devices are glued with ACPI devices
1e4cffe7 11 * acpi_get_pci_dev() can be called to identify ACPI graphics
c3d6de69
TR		 12 * devices for which a real graphics card is plugged in
13 *
c3d6de69
TR		 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 *
7ec48ced 17 * Otherwise vendor specific drivers like thinkpad_acpi, asus-laptop,
677bd810 18 * sony_acpi,... can take care about backlight brightness.
c3d6de69 19 *
2600bfa3
HG		 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.
c3d6de69 23 *
87521e16
HG		 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.
c3d6de69
TR		 27 */
28
214f2c90 29#include <linux/export.h>
c3d6de69 30#include <linux/acpi.h>
21245df3 31#include <linux/apple-gmux.h>
87521e16 32#include <linux/backlight.h>
c3d6de69 33#include <linux/dmi.h>
14ca7a47 34#include <linux/module.h>
1e4cffe7 35#include <linux/pci.h>
fe7aebb4 36#include <linux/platform_data/x86/nvidia-wmi-ec-backlight.h>
3cf3b7f0 37#include <linux/pnp.h>
87521e16 38#include <linux/types.h>
7231ed1a 39#include <linux/workqueue.h>
87521e16 40#include <acpi/video.h>
c3d6de69 41
87521e16
HG		 42static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef;
43static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef;
c3d6de69 44
14ca7a47
HG		 45static void acpi_video_parse_cmdline(void)
46{
47 if (!strcmp("vendor", acpi_video_backlight_string))
87521e16 48 acpi_backlight_cmdline = acpi_backlight_vendor;
14ca7a47 49 if (!strcmp("video", acpi_video_backlight_string))
87521e16
HG		 50 acpi_backlight_cmdline = acpi_backlight_video;
51 if (!strcmp("native", acpi_video_backlight_string))
52 acpi_backlight_cmdline = acpi_backlight_native;
420a1116
HG		 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;
cd8e468e
HG		 57 if (!strcmp("dell_uart", acpi_video_backlight_string))
58 acpi_backlight_cmdline = acpi_backlight_dell_uart;
87521e16
HG		 59 if (!strcmp("none", acpi_video_backlight_string))
60 acpi_backlight_cmdline = acpi_backlight_none;
14ca7a47
HG		 61}
62
c3d6de69
TR		 63static acpi_status
64find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
65{
99ece713 66 struct acpi_device *acpi_dev = acpi_fetch_acpi_dev(handle);
c3d6de69 67 long *cap = context;
1e4cffe7 68 struct pci_dev *dev;
c3d6de69 69
4a4f01a6 70 static const struct acpi_device_id video_ids[] = {
c3d6de69
TR		 71 {ACPI_VIDEO_HID, 0},
72 {"", 0},
73 };
c3d6de69 74
99ece713 75 if (acpi_dev && !acpi_match_device_ids(acpi_dev, video_ids)) {
1e4cffe7 76 dev = acpi_get_pci_dev(handle);
c3d6de69
TR		 77 if (!dev)
78 return AE_OK;
1e4cffe7 79 pci_dev_put(dev);
d4e1a692 80 *cap |= acpi_is_video_device(handle);
c3d6de69
TR		 81 }
82 return AE_OK;
83}
84
fe7aebb4
HG		 85/* This depends on ACPI_WMI which is X86 only */
86#ifdef CONFIG_X86
87static bool nvidia_wmi_ec_supported(void)
88{
89 struct wmi_brightness_args args = {
90 .mode = WMI_BRIGHTNESS_MODE_GET,
91 .val = 0,
92 .ret = 0,
93 };
94 struct acpi_buffer buf = { (acpi_size)sizeof(args), &args };
95 acpi_status status;
96
97 status = wmi_evaluate_method(WMI_BRIGHTNESS_GUID, 0,
98 WMI_BRIGHTNESS_METHOD_SOURCE, &buf, &buf);
99 if (ACPI_FAILURE(status))
100 return false;
101
102 /*
103 * If brightness is handled by the EC then nvidia-wmi-ec-backlight
104 * should be used, else the GPU driver(s) should be used.
105 */
106 return args.ret == WMI_BRIGHTNESS_SOURCE_EC;
107}
108#else
109static bool nvidia_wmi_ec_supported(void)
110{
111 return false;
112}
113#endif
114
084940d5
CC		 115/* Force to use vendor driver when the ACPI device is known to be
116 * buggy */
117static int video_detect_force_vendor(const struct dmi_system_id *d)
118{
87521e16 119 acpi_backlight_dmi = acpi_backlight_vendor;
084940d5
CC		 120 return 0;
121}
122
3bd6bce3
HG		 123static int video_detect_force_video(const struct dmi_system_id *d)
124{
125 acpi_backlight_dmi = acpi_backlight_video;
126 return 0;
127}
128
129static int video_detect_force_native(const struct dmi_system_id *d)
130{
131 acpi_backlight_dmi = acpi_backlight_native;
132 return 0;
133}
134
35a341c9
OZ		 135static int video_detect_portege_r100(const struct dmi_system_id *d)
136{
137 struct pci_dev *dev;
138 /* Search for Trident CyberBlade XP4m32 to confirm Portégé R100 */
139 dev = pci_get_device(PCI_VENDOR_ID_TRIDENT, 0x2100, NULL);
140 if (dev)
141 acpi_backlight_dmi = acpi_backlight_vendor;
142 return 0;
143}
144
4a4f01a6 145static const struct dmi_system_id video_detect_dmi_table[] = {
84d56f32
HG		 146 /*
147 * Models which should use the vendor backlight interface,
148 * because of broken ACPI video backlight control.
149 */
0172df18
HG		 150 {
151 /* https://bugzilla.redhat.com/show_bug.cgi?id=1128309 */
152 .callback = video_detect_force_vendor,
153 /* Acer KAV80 */
154 .matches = {
155 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
156 DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"),
157 },
158 },
d0c2ce16 159 {
c2d6920e
HG		 160 .callback = video_detect_force_vendor,
161 /* Asus UL30VT */
162 .matches = {
d0c2ce16
LT		 163 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
164 DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"),
165 },
166 },
c8f6d835 167 {
c2d6920e
HG		 168 .callback = video_detect_force_vendor,
169 /* Asus UL30A */
170 .matches = {
c8f6d835
BT		 171 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
172 DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"),
173 },
174 },
52796b30
HG		 175 {
176 .callback = video_detect_force_vendor,
177 /* Asus X55U */
178 .matches = {
179 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
180 DMI_MATCH(DMI_PRODUCT_NAME, "X55U"),
181 },
182 },
183 {
60f1fac2 184 /* https://bugs.launchpad.net/bugs/1000146 */
52796b30
HG		 185 .callback = video_detect_force_vendor,
186 /* Asus X101CH */
187 .matches = {
188 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
189 DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"),
190 },
191 },
192 {
193 .callback = video_detect_force_vendor,
194 /* Asus X401U */
195 .matches = {
196 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
197 DMI_MATCH(DMI_PRODUCT_NAME, "X401U"),
198 },
199 },
200 {
201 .callback = video_detect_force_vendor,
202 /* Asus X501U */
203 .matches = {
204 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
205 DMI_MATCH(DMI_PRODUCT_NAME, "X501U"),
206 },
207 },
208 {
60f1fac2 209 /* https://bugs.launchpad.net/bugs/1000146 */
52796b30
HG		 210 .callback = video_detect_force_vendor,
211 /* Asus 1015CX */
212 .matches = {
213 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
214 DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"),
215 },
216 },
8991d7d9
HG		 217 {
218 .callback = video_detect_force_vendor,
219 /* Samsung N150/N210/N220 */
220 .matches = {
221 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
222 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
223 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
224 },
225 },
226 {
227 .callback = video_detect_force_vendor,
228 /* Samsung NF110/NF210/NF310 */
229 .matches = {
230 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
231 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
232 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
233 },
234 },
235 {
236 .callback = video_detect_force_vendor,
237 /* Samsung NC210 */
238 .matches = {
239 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
240 DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"),
241 DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"),
242 },
243 },
3bd6bce3 244
23735543
HG		 245 /*
246 * Models which should use the vendor backlight interface,
247 * because of broken native backlight control.
248 */
249 {
250 .callback = video_detect_force_vendor,
251 /* Sony Vaio PCG-FRV35 */
252 .matches = {
253 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
254 DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"),
255 },
256 },
eb7b0f12
HG		 257 {
258 .callback = video_detect_force_vendor,
259 /* Panasonic Toughbook CF-18 */
260 .matches = {
261 DMI_MATCH(DMI_SYS_VENDOR, "Matsushita Electric Industrial"),
262 DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"),
263 },
264 },
23735543 265
a2ed70d0
HG		 266 /*
267 * Toshiba models with Transflective display, these need to use
268 * the toshiba_acpi vendor driver for proper Transflective handling.
269 */
270 {
271 .callback = video_detect_force_vendor,
272 .matches = {
273 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
274 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R500"),
275 },
276 },
277 {
278 .callback = video_detect_force_vendor,
279 .matches = {
280 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
281 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R600"),
282 },
283 },
284
35a341c9
OZ		 285 /*
286 * Toshiba Portégé R100 has working both acpi_video and toshiba_acpi
287 * vendor driver. But none of them gets activated as it has a VGA with
288 * no kernel driver (Trident CyberBlade XP4m32).
289 * The DMI strings are generic so check for the VGA chip in callback.
290 */
291 {
292 .callback = video_detect_portege_r100,
293 .matches = {
294 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
295 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
296 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
297 DMI_MATCH(DMI_BOARD_NAME, "Portable PC")
298 },
299 },
300
26991079
HG		 301 /*
302 * Models which need acpi_video backlight control where the GPU drivers
303 * do not call acpi_video_register_backlight() because no internal panel
304 * is detected. Typically these are all-in-ones (monitors with builtin
305 * PC) where the panel connection shows up as regular DP instead of eDP.
306 */
307 {
308 .callback = video_detect_force_video,
309 /* Apple iMac14,1 */
310 .matches = {
311 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
312 DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,1"),
313 },
314 },
315 {
316 .callback = video_detect_force_video,
317 /* Apple iMac14,2 */
318 .matches = {
319 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
320 DMI_MATCH(DMI_PRODUCT_NAME, "iMac14,2"),
321 },
322 },
323
3bd6bce3
HG		 324 /*
325 * These models have a working acpi_video backlight control, and using
326 * native backlight causes a regression where backlight does not work
327 * when userspace is not handling brightness key events. Disable
328 * native_backlight on these to fix this:
329 * https://bugzilla.kernel.org/show_bug.cgi?id=81691
330 */
331 {
332 .callback = video_detect_force_video,
3b6740bd 333 /* ThinkPad T420 */
3bd6bce3
HG		 334 .matches = {
335 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
336 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
337 },
338 },
339 {
340 .callback = video_detect_force_video,
3b6740bd 341 /* ThinkPad T520 */
3bd6bce3
HG		 342 .matches = {
343 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
344 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"),
345 },
346 },
347 {
348 .callback = video_detect_force_video,
3b6740bd 349 /* ThinkPad X201s */
3bd6bce3
HG		 350 .matches = {
351 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
352 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
353 },
354 },
c6237b21
ML		 355 {
356 .callback = video_detect_force_video,
3b6740bd 357 /* ThinkPad X201T */
c6237b21
ML		 358 .matches = {
359 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
360 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"),
361 },
362 },
3bd6bce3
HG		 363
364 /* The native backlight controls do not work on some older machines */
365 {
366 /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */
367 .callback = video_detect_force_video,
3b6740bd 368 /* HP ENVY 15 Notebook */
3bd6bce3
HG		 369 .matches = {
370 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
371 DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"),
372 },
373 },
374 {
375 .callback = video_detect_force_video,
3b6740bd 376 /* SAMSUNG 870Z5E/880Z5E/680Z5E */
3bd6bce3
HG		 377 .matches = {
378 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
379 DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"),
380 },
381 },
382 {
383 .callback = video_detect_force_video,
3b6740bd 384 /* SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V */
3bd6bce3
HG		 385 .matches = {
386 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
387 DMI_MATCH(DMI_PRODUCT_NAME,
388 "370R4E/370R4V/370R5E/3570RE/370R5V"),
389 },
390 },
391 {
392 /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
393 .callback = video_detect_force_video,
3b6740bd 394 /* SAMSUNG 3570R/370R/470R/450R/510R/4450RV */
3bd6bce3
HG		 395 .matches = {
396 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
397 DMI_MATCH(DMI_PRODUCT_NAME,
398 "3570R/370R/470R/450R/510R/4450RV"),
399 },
400 },
bbf03861
HG		 401 {
402 /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */
403 .callback = video_detect_force_video,
3b6740bd 404 /* SAMSUNG 670Z5E */
bbf03861
HG		 405 .matches = {
406 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
407 DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"),
408 },
409 },
3bd6bce3
HG		 410 {
411 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
412 .callback = video_detect_force_video,
3b6740bd 413 /* SAMSUNG 730U3E/740U3E */
3bd6bce3
HG		 414 .matches = {
415 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
416 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
417 },
418 },
419 {
420 /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
421 .callback = video_detect_force_video,
3b6740bd 422 /* SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D */
3bd6bce3
HG		 423 .matches = {
424 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
425 DMI_MATCH(DMI_PRODUCT_NAME,
426 "900X3C/900X3D/900X3E/900X4C/900X4D"),
427 },
428 },
61f9738d
HG		 429 {
430 /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */
431 .callback = video_detect_force_video,
3b6740bd 432 /* Dell XPS14 L421X */
61f9738d
HG		 433 .matches = {
434 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
435 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"),
436 },
437 },
3bd6bce3
HG		 438 {
439 /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
440 .callback = video_detect_force_video,
3b6740bd 441 /* Dell XPS15 L521X */
3bd6bce3
HG		 442 .matches = {
443 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
444 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
445 },
446 },
49eb5208
AL		 447 {
448 /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */
449 .callback = video_detect_force_video,
3b6740bd 450 /* SAMSUNG 530U4E/540U4E */
49eb5208
AL		 451 .matches = {
452 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
453 DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
454 },
455 },
b226faab 456 {
60f1fac2 457 /* https://bugs.launchpad.net/bugs/1894667 */
b226faab 458 .callback = video_detect_force_video,
3b6740bd 459 /* HP 635 Notebook */
b226faab
AH		 460 .matches = {
461 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
462 DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"),
463 },
464 },
3bd6bce3
HG		 465
466 /* Non win8 machines which need native backlight nevertheless */
584d8d1e
HG		 467 {
468 /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */
469 .callback = video_detect_force_native,
3b6740bd 470 /* Lenovo Ideapad S405 */
584d8d1e
HG		 471 .matches = {
472 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
473 DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
474 },
475 },
96b709be
JSS		 476 {
477 /* https://bugzilla.suse.com/show_bug.cgi?id=1208724 */
478 .callback = video_detect_force_native,
479 /* Lenovo Ideapad Z470 */
480 .matches = {
481 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
482 DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad Z470"),
483 },
484 },
3bd6bce3
HG		 485 {
486 /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
487 .callback = video_detect_force_native,
3b6740bd 488 /* Lenovo Ideapad Z570 */
3bd6bce3
HG		 489 .matches = {
490 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
2d11eae4 491 DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"),
3bd6bce3
HG		 492 },
493 },
53870cf0
AM		 494 {
495 .callback = video_detect_force_native,
3b6740bd 496 /* Lenovo E41-25 */
53870cf0
AM		 497 .matches = {
498 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
499 DMI_MATCH(DMI_PRODUCT_NAME, "81FS"),
500 },
501 },
502 {
503 .callback = video_detect_force_native,
3b6740bd 504 /* Lenovo E41-45 */
53870cf0
AM		 505 .matches = {
506 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
507 DMI_MATCH(DMI_PRODUCT_NAME, "82BK"),
508 },
509 },
c901f63d
TI		 510 {
511 .callback = video_detect_force_native,
512 /* Lenovo Slim 7 16ARH7 */
513 .matches = {
514 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
515 DMI_MATCH(DMI_PRODUCT_NAME, "82UX"),
516 },
517 },
bd5d93df
HG		 518 {
519 .callback = video_detect_force_native,
520 /* Lenovo ThinkPad X131e (3371 AMD version) */
521 .matches = {
522 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
523 DMI_MATCH(DMI_PRODUCT_NAME, "3371"),
524 },
525 },
48436f2e
HG		 526 {
527 .callback = video_detect_force_native,
528 /* Apple iMac11,3 */
529 .matches = {
530 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
531 DMI_MATCH(DMI_PRODUCT_NAME, "iMac11,3"),
532 },
533 },
8cf04bb3
HG		 534 {
535 /* https://gitlab.freedesktop.org/drm/amd/-/issues/1838 */
536 .callback = video_detect_force_native,
537 /* Apple iMac12,1 */
538 .matches = {
539 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
540 DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,1"),
541 },
542 },
543 {
544 /* https://gitlab.freedesktop.org/drm/amd/-/issues/2753 */
545 .callback = video_detect_force_native,
546 /* Apple iMac12,2 */
547 .matches = {
548 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
549 DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,2"),
550 },
551 },
d010a028
OC		 552 {
553 .callback = video_detect_force_native,
554 /* Apple MacBook Air 9,1 */
555 .matches = {
556 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
557 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir9,1"),
558 },
559 },
7dc918da
ES		 560 {
561 .callback = video_detect_force_native,
562 /* Apple MacBook Pro 9,2 */
563 .matches = {
564 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
565 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,2"),
566 },
567 },
3bd6bce3
HG		 568 {
569 /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
570 .callback = video_detect_force_native,
3b6740bd 571 /* Apple MacBook Pro 12,1 */
3bd6bce3
HG		 572 .matches = {
573 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
574 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
575 },
576 },
d010a028
OC		 577 {
578 .callback = video_detect_force_native,
579 /* Apple MacBook Pro 16,2 */
580 .matches = {
581 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
582 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,2"),
583 },
584 },
03c440a2
HG		 585 {
586 .callback = video_detect_force_native,
587 /* Dell Inspiron N4010 */
588 .matches = {
589 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
590 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N4010"),
591 },
592 },
4b4b3b20
HG		 593 {
594 .callback = video_detect_force_native,
3b6740bd 595 /* Dell Vostro V131 */
4b4b3b20
HG		 596 .matches = {
597 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
598 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
599 },
600 },
350fa038
HG		 601 {
602 /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */
603 .callback = video_detect_force_native,
3b6740bd 604 /* Dell XPS 17 L702X */
350fa038
HG		 605 .matches = {
606 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
607 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
608 },
609 },
d37efb79
SYLF		 610 {
611 .callback = video_detect_force_native,
3b6740bd 612 /* Dell Precision 7510 */
d37efb79
SYLF		 613 .matches = {
614 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
615 DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
616 },
617 },
23d28cc0
HG		 618 {
619 .callback = video_detect_force_native,
620 /* Dell Studio 1569 */
621 .matches = {
622 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
623 DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1569"),
624 },
625 },
5e7a3bf6
HG		 626 {
627 .callback = video_detect_force_native,
628 /* Acer Aspire 3830TG */
629 .matches = {
630 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
631 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3830TG"),
632 },
633 },
8ba5fc4c
HG		 634 {
635 .callback = video_detect_force_native,
636 /* Acer Aspire 4810T */
637 .matches = {
638 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
639 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"),
640 },
641 },
1c8fbc1f
HG		 642 {
643 .callback = video_detect_force_native,
3b6740bd 644 /* Acer Aspire 5738z */
1c8fbc1f
HG		 645 .matches = {
646 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
647 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"),
648 DMI_MATCH(DMI_BOARD_NAME, "JV50"),
649 },
650 },
0172df18
HG		 651 {
652 /* https://bugzilla.redhat.com/show_bug.cgi?id=1012674 */
653 .callback = video_detect_force_native,
654 /* Acer Aspire 5741 */
655 .matches = {
656 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
657 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"),
658 },
659 },
660 {
661 /* https://bugzilla.kernel.org/show_bug.cgi?id=42993 */
662 .callback = video_detect_force_native,
663 /* Acer Aspire 5750 */
664 .matches = {
665 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
666 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"),
667 },
668 },
669 {
670 /* https://bugzilla.kernel.org/show_bug.cgi?id=42833 */
671 .callback = video_detect_force_native,
672 /* Acer Extensa 5235 */
673 .matches = {
674 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
675 DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"),
676 },
677 },
678 {
679 .callback = video_detect_force_native,
680 /* Acer TravelMate 4750 */
681 .matches = {
682 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
683 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"),
684 },
685 },
c41c36e9
PM		 686 {
687 /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */
688 .callback = video_detect_force_native,
3b6740bd 689 /* Acer TravelMate 5735Z */
c41c36e9
PM		 690 .matches = {
691 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
692 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"),
693 DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"),
694 },
695 },
0172df18
HG		 696 {
697 /* https://bugzilla.kernel.org/show_bug.cgi?id=36322 */
698 .callback = video_detect_force_native,
699 /* Acer TravelMate 5760 */
700 .matches = {
701 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
702 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"),
703 },
704 },
2dfbacc6 705 {
c2d6920e
HG		 706 .callback = video_detect_force_native,
707 /* ASUSTeK COMPUTER INC. GA401 */
708 .matches = {
2dfbacc6
LJ		 709 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
710 DMI_MATCH(DMI_PRODUCT_NAME, "GA401"),
711 },
712 },
713 {
c2d6920e
HG		 714 .callback = video_detect_force_native,
715 /* ASUSTeK COMPUTER INC. GA502 */
716 .matches = {
2dfbacc6
LJ		 717 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
718 DMI_MATCH(DMI_PRODUCT_NAME, "GA502"),
719 },
720 },
721 {
c2d6920e
HG		 722 .callback = video_detect_force_native,
723 /* ASUSTeK COMPUTER INC. GA503 */
724 .matches = {
2dfbacc6
LJ		 725 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
726 DMI_MATCH(DMI_PRODUCT_NAME, "GA503"),
727 },
728 },
e6b3086f
HG		 729 {
730 .callback = video_detect_force_native,
731 /* Asus U46E */
732 .matches = {
733 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
734 DMI_MATCH(DMI_PRODUCT_NAME, "U46E"),
735 },
736 },
1e3344d6
HG		 737 {
738 .callback = video_detect_force_native,
739 /* Asus UX303UB */
740 .matches = {
741 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
742 DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"),
743 },
744 },
9dcb3423
HG		 745 {
746 .callback = video_detect_force_native,
747 /* HP EliteBook 8460p */
748 .matches = {
749 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
750 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8460p"),
751 },
752 },
d77596d4
HG		 753 {
754 .callback = video_detect_force_native,
755 /* HP Pavilion g6-1d80nr / B4U19UA */
756 .matches = {
757 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
758 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"),
759 DMI_MATCH(DMI_PRODUCT_SKU, "B4U19UA"),
760 },
761 },
8991d7d9
HG		 762 {
763 .callback = video_detect_force_native,
764 /* Samsung N150P */
765 .matches = {
766 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
767 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
768 DMI_MATCH(DMI_BOARD_NAME, "N150P"),
769 },
770 },
771 {
772 .callback = video_detect_force_native,
773 /* Samsung N145P/N250P/N260P */
774 .matches = {
775 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
776 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
777 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
778 },
779 },
780 {
781 .callback = video_detect_force_native,
782 /* Samsung N250P */
783 .matches = {
784 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
785 DMI_MATCH(DMI_PRODUCT_NAME, "N250P"),
786 DMI_MATCH(DMI_BOARD_NAME, "N250P"),
787 },
788 },
84d56f32
HG		 789 {
790 /* https://bugzilla.kernel.org/show_bug.cgi?id=202401 */
791 .callback = video_detect_force_native,
792 /* Sony Vaio VPCEH3U1E */
793 .matches = {
794 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
795 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"),
796 },
797 },
f5a6ff92
HG		 798 {
799 .callback = video_detect_force_native,
800 /* Sony Vaio VPCY11S1E */
801 .matches = {
802 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
803 DMI_MATCH(DMI_PRODUCT_NAME, "VPCY11S1E"),
804 },
805 },
10212754 806
c5b94f5b
HG		 807 /*
808 * These Toshibas have a broken acpi-video interface for brightness
809 * control. They also have an issue where the panel is off after
810 * suspend until a special firmware call is made to turn it back
811 * on. This is handled by the toshiba_acpi kernel module, so that
812 * module must be enabled for these models to work correctly.
813 */
814 {
815 /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */
816 .callback = video_detect_force_native,
817 /* Toshiba Portégé R700 */
818 .matches = {
819 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
820 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"),
821 },
822 },
823 {
824 /* Portégé: https://bugs.freedesktop.org/show_bug.cgi?id=82634 */
825 /* Satellite: https://bugzilla.kernel.org/show_bug.cgi?id=21012 */
826 .callback = video_detect_force_native,
827 /* Toshiba Satellite/Portégé R830 */
828 .matches = {
829 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
830 DMI_MATCH(DMI_PRODUCT_NAME, "R830"),
831 },
832 },
833 {
834 .callback = video_detect_force_native,
835 /* Toshiba Satellite/Portégé Z830 */
836 .matches = {
837 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
838 DMI_MATCH(DMI_PRODUCT_NAME, "Z830"),
839 },
840 },
841
5c7bb62c
HG		 842 /*
843 * Dell AIO (All in Ones) which advertise an UART attached backlight
844 * controller board in their ACPI tables (and may even have one), but
845 * which need native backlight control nevertheless.
846 */
847 {
848 /* https://bugzilla.redhat.com/show_bug.cgi?id=2303936 */
849 .callback = video_detect_force_native,
850 /* Dell OptiPlex 7760 AIO */
851 .matches = {
852 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
853 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7760 AIO"),
854 },
855 },
856
f46acc1e
HG		 857 /*
858 * Models which have nvidia-ec-wmi support, but should not use it.
859 * Note this indicates a likely firmware bug on these models and should
860 * be revisited if/when Linux gets support for dynamic mux mode.
861 */
862 {
863 .callback = video_detect_force_native,
864 /* Dell G15 5515 */
865 .matches = {
866 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
867 DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5515"),
868 },
869 },
89b04114
CLKA		 870 {
871 .callback = video_detect_force_native,
872 .matches = {
873 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
874 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 15 3535"),
875 },
876 },
22c11b8f
HG		 877
878 /*
879 * x86 android tablets which directly control the backlight through
880 * an external backlight controller, typically TI's LP8557.
881 * The backlight is directly controlled by the lp855x driver on these.
882 * This setup means that neither i915's native nor acpi_video backlight
883 * control works. Add a "vendor" quirk to disable both. Note these
884 * devices do not use vendor control in the typical meaning of
885 * vendor specific SMBIOS or ACPI calls being used.
886 */
2ce32625
HG		 887 {
888 .callback = video_detect_force_vendor,
889 /* Lenovo Yoga Book X90F / X90L */
890 .matches = {
891 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
892 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
893 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"),
894 },
895 },
896 {
897 .callback = video_detect_force_vendor,
898 /*
899 * Lenovo Yoga Tablet 2 830F/L or 1050F/L (The 8" and 10"
900 * Lenovo Yoga Tablet 2 use the same mainboard)
901 */
902 .matches = {
903 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."),
904 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"),
905 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
906 /* Partial match on beginning of BIOS version */
907 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"),
908 },
909 },
910 {
911 .callback = video_detect_force_vendor,
912 /* Lenovo Yoga Tab 3 Pro YT3-X90F */
913 .matches = {
914 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
2ce32625
HG		 915 DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),
916 },
917 },
22c11b8f
HG		 918 {
919 .callback = video_detect_force_vendor,
920 /* Xiaomi Mi Pad 2 */
921 .matches = {
922 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
923 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
924 },
925 },
084940d5
CC		 926 { },
927};
928
e9cf4d9b
DO		 929static bool google_cros_ec_present(void)
930{
59dc2a7e 931 return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C");
e9cf4d9b
DO		 932}
933
a5df4252
HG		 934/*
935 * Windows 8 and newer no longer use the ACPI video interface, so it often
936 * does not work. So on win8+ systems prefer native brightness control.
937 * Chromebooks should always prefer native backlight control.
938 */
939static bool prefer_native_over_acpi_video(void)
940{
941 return acpi_osi_is_win8() || google_cros_ec_present();
942}
943
c3d6de69 944/*
87521e16
HG		 945 * Determine which type of backlight interface to use on this system,
946 * First check cmdline, then dmi quirks, then do autodetect.
c3d6de69 947 */
78dfc9d1 948enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto_detect)
c3d6de69 949{
87521e16 950 static DEFINE_MUTEX(init_mutex);
fe7aebb4 951 static bool nvidia_wmi_ec_present;
b0935f11 952 static bool apple_gmux_present;
cd8e468e 953 static bool dell_uart_present;
2600bfa3 954 static bool native_available;
87521e16
HG		 955 static bool init_done;
956 static long video_caps;
084940d5 957
87521e16
HG		 958 /* Parse cmdline, dmi and acpi only once */
959 mutex_lock(&init_mutex);
960 if (!init_done) {
961 acpi_video_parse_cmdline();
084940d5 962 dmi_check_system(video_detect_dmi_table);
87521e16 963 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
2263576c 964 ACPI_UINT32_MAX, find_video, NULL,
87521e16 965 &video_caps, NULL);
fe7aebb4 966 nvidia_wmi_ec_present = nvidia_wmi_ec_supported();
b0935f11 967 apple_gmux_present = apple_gmux_detect(NULL, NULL);
cd8e468e 968 dell_uart_present = acpi_dev_present("DELL0501", NULL, -1);
87521e16 969 init_done = true;
c3d6de69 970 }
2600bfa3
HG		 971 if (native)
972 native_available = true;
87521e16
HG		 973 mutex_unlock(&init_mutex);
974
78dfc9d1
HG		 975 if (auto_detect)
976 *auto_detect = false;
977
b39be9f4
HG		 978 /*
979 * The below heuristics / detection steps are in order of descending
980 * presedence. The commandline takes presedence over anything else.
981 */
87521e16
HG		 982 if (acpi_backlight_cmdline != acpi_backlight_undef)
983 return acpi_backlight_cmdline;
984
b39be9f4 985 /* DMI quirks override any autodetection. */
87521e16
HG		 986 if (acpi_backlight_dmi != acpi_backlight_undef)
987 return acpi_backlight_dmi;
988
78dfc9d1
HG		 989 if (auto_detect)
990 *auto_detect = true;
991
fe7aebb4
HG		 992 /* Special cases such as nvidia_wmi_ec and apple gmux. */
993 if (nvidia_wmi_ec_present)
994 return acpi_backlight_nvidia_wmi_ec;
995
b0935f11 996 if (apple_gmux_present)
21245df3
HG		 997 return acpi_backlight_apple_gmux;
998
cd8e468e
HG		 999 if (dell_uart_present)
1000 return acpi_backlight_dell_uart;
1001
a5df4252
HG		 1002 /* Use ACPI video if available, except when native should be preferred. */
1003 if ((video_caps & ACPI_VIDEO_BACKLIGHT) &&
1004 !(native_available && prefer_native_over_acpi_video()))
1005 return acpi_backlight_video;
59dc2a7e 1006
a5df4252 1007 /* Use native if available */
fb1836c9 1008 if (native_available)
a5df4252 1009 return acpi_backlight_native;
87521e16 1010
aa8a950a
HG		 1011 /*
1012 * The vendor specific BIOS interfaces are only necessary for
1013 * laptops from before ~2008.
1014 *
1015 * For laptops from ~2008 till ~2023 this point is never reached
1016 * because on those (video_caps & ACPI_VIDEO_BACKLIGHT) above is true.
1017 *
1018 * Laptops from after ~2023 no longer support ACPI_VIDEO_BACKLIGHT,
1019 * if this point is reached on those, this likely means that
1020 * the GPU kms driver which sets native_available has not loaded yet.
1021 *
1022 * Returning acpi_backlight_vendor in this case is known to sometimes
1023 * cause a non working vendor specific /sys/class/backlight device to
1024 * get registered.
1025 *
1026 * Return acpi_backlight_none on laptops with ACPI tables written
1027 * for Windows 8 (laptops from after ~2012) to avoid this problem.
1028 */
1029 if (acpi_osi_is_win8())
1030 return acpi_backlight_none;
1031
fb1836c9 1032 /* No ACPI video/native (old hw), use vendor specific fw methods. */
b39be9f4 1033 return acpi_backlight_vendor;
c3d6de69 1034}
78dfc9d1 1035EXPORT_SYMBOL(__acpi_video_get_backlight_type);
Linux 6.x block layer and io_uring tree(s)