Commit | Line | Data |
---|---|---|
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 |
42 | static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef; |
43 | static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef; | |
c3d6de69 | 44 | |
14ca7a47 HG |
45 | static 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; | |
87521e16 HG |
57 | if (!strcmp("none", acpi_video_backlight_string)) |
58 | acpi_backlight_cmdline = acpi_backlight_none; | |
14ca7a47 HG |
59 | } |
60 | ||
c3d6de69 TR |
61 | static acpi_status |
62 | find_video(acpi_handle handle, u32 lvl, void *context, void **rv) | |
63 | { | |
99ece713 | 64 | struct acpi_device *acpi_dev = acpi_fetch_acpi_dev(handle); |
c3d6de69 | 65 | long *cap = context; |
1e4cffe7 | 66 | struct pci_dev *dev; |
c3d6de69 | 67 | |
4a4f01a6 | 68 | static const struct acpi_device_id video_ids[] = { |
c3d6de69 TR |
69 | {ACPI_VIDEO_HID, 0}, |
70 | {"", 0}, | |
71 | }; | |
c3d6de69 | 72 | |
99ece713 | 73 | if (acpi_dev && !acpi_match_device_ids(acpi_dev, video_ids)) { |
1e4cffe7 | 74 | dev = acpi_get_pci_dev(handle); |
c3d6de69 TR |
75 | if (!dev) |
76 | return AE_OK; | |
1e4cffe7 | 77 | pci_dev_put(dev); |
d4e1a692 | 78 | *cap |= acpi_is_video_device(handle); |
c3d6de69 TR |
79 | } |
80 | return AE_OK; | |
81 | } | |
82 | ||
fe7aebb4 HG |
83 | /* This depends on ACPI_WMI which is X86 only */ |
84 | #ifdef CONFIG_X86 | |
85 | static bool nvidia_wmi_ec_supported(void) | |
86 | { | |
87 | struct wmi_brightness_args args = { | |
88 | .mode = WMI_BRIGHTNESS_MODE_GET, | |
89 | .val = 0, | |
90 | .ret = 0, | |
91 | }; | |
92 | struct acpi_buffer buf = { (acpi_size)sizeof(args), &args }; | |
93 | acpi_status status; | |
94 | ||
95 | status = wmi_evaluate_method(WMI_BRIGHTNESS_GUID, 0, | |
96 | WMI_BRIGHTNESS_METHOD_SOURCE, &buf, &buf); | |
97 | if (ACPI_FAILURE(status)) | |
98 | return false; | |
99 | ||
100 | /* | |
101 | * If brightness is handled by the EC then nvidia-wmi-ec-backlight | |
102 | * should be used, else the GPU driver(s) should be used. | |
103 | */ | |
104 | return args.ret == WMI_BRIGHTNESS_SOURCE_EC; | |
105 | } | |
106 | #else | |
107 | static bool nvidia_wmi_ec_supported(void) | |
108 | { | |
109 | return false; | |
110 | } | |
111 | #endif | |
112 | ||
084940d5 CC |
113 | /* Force to use vendor driver when the ACPI device is known to be |
114 | * buggy */ | |
115 | static int video_detect_force_vendor(const struct dmi_system_id *d) | |
116 | { | |
87521e16 | 117 | acpi_backlight_dmi = acpi_backlight_vendor; |
084940d5 CC |
118 | return 0; |
119 | } | |
120 | ||
3bd6bce3 HG |
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 | ||
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 | ||
35a341c9 OZ |
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 | ||
4a4f01a6 | 143 | static const struct dmi_system_id video_detect_dmi_table[] = { |
84d56f32 HG |
144 | /* |
145 | * Models which should use the vendor backlight interface, | |
146 | * because of broken ACPI video backlight control. | |
147 | */ | |
0172df18 HG |
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 | }, | |
d0c2ce16 | 157 | { |
c2d6920e HG |
158 | .callback = video_detect_force_vendor, |
159 | /* Asus UL30VT */ | |
160 | .matches = { | |
d0c2ce16 LT |
161 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), |
162 | DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"), | |
163 | }, | |
164 | }, | |
c8f6d835 | 165 | { |
c2d6920e HG |
166 | .callback = video_detect_force_vendor, |
167 | /* Asus UL30A */ | |
168 | .matches = { | |
c8f6d835 BT |
169 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), |
170 | DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"), | |
171 | }, | |
172 | }, | |
52796b30 HG |
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 | { | |
60f1fac2 | 182 | /* https://bugs.launchpad.net/bugs/1000146 */ |
52796b30 HG |
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 | { | |
60f1fac2 | 207 | /* https://bugs.launchpad.net/bugs/1000146 */ |
52796b30 HG |
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 | }, | |
8991d7d9 HG |
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 | }, | |
3bd6bce3 | 242 | |
23735543 HG |
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 | ||
a2ed70d0 HG |
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 | ||
35a341c9 OZ |
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 | ||
26991079 HG |
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 | ||
3bd6bce3 HG |
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, | |
3b6740bd | 323 | /* ThinkPad T420 */ |
3bd6bce3 HG |
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, | |
3b6740bd | 331 | /* ThinkPad T520 */ |
3bd6bce3 HG |
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, | |
3b6740bd | 339 | /* ThinkPad X201s */ |
3bd6bce3 HG |
340 | .matches = { |
341 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
342 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), | |
343 | }, | |
344 | }, | |
c6237b21 ML |
345 | { |
346 | .callback = video_detect_force_video, | |
3b6740bd | 347 | /* ThinkPad X201T */ |
c6237b21 ML |
348 | .matches = { |
349 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
350 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"), | |
351 | }, | |
352 | }, | |
3bd6bce3 HG |
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, | |
3b6740bd | 358 | /* HP ENVY 15 Notebook */ |
3bd6bce3 HG |
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, | |
3b6740bd | 366 | /* SAMSUNG 870Z5E/880Z5E/680Z5E */ |
3bd6bce3 HG |
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, | |
3b6740bd | 374 | /* SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V */ |
3bd6bce3 HG |
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, | |
3b6740bd | 384 | /* SAMSUNG 3570R/370R/470R/450R/510R/4450RV */ |
3bd6bce3 HG |
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 | }, | |
bbf03861 HG |
391 | { |
392 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */ | |
393 | .callback = video_detect_force_video, | |
3b6740bd | 394 | /* SAMSUNG 670Z5E */ |
bbf03861 HG |
395 | .matches = { |
396 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
397 | DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"), | |
398 | }, | |
399 | }, | |
3bd6bce3 HG |
400 | { |
401 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */ | |
402 | .callback = video_detect_force_video, | |
3b6740bd | 403 | /* SAMSUNG 730U3E/740U3E */ |
3bd6bce3 HG |
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, | |
3b6740bd | 412 | /* SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D */ |
3bd6bce3 HG |
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 | }, | |
61f9738d HG |
419 | { |
420 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */ | |
421 | .callback = video_detect_force_video, | |
3b6740bd | 422 | /* Dell XPS14 L421X */ |
61f9738d HG |
423 | .matches = { |
424 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
425 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
426 | }, | |
427 | }, | |
3bd6bce3 HG |
428 | { |
429 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */ | |
430 | .callback = video_detect_force_video, | |
3b6740bd | 431 | /* Dell XPS15 L521X */ |
3bd6bce3 HG |
432 | .matches = { |
433 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
434 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), | |
435 | }, | |
436 | }, | |
49eb5208 AL |
437 | { |
438 | /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */ | |
439 | .callback = video_detect_force_video, | |
3b6740bd | 440 | /* SAMSUNG 530U4E/540U4E */ |
49eb5208 AL |
441 | .matches = { |
442 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
443 | DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"), | |
444 | }, | |
445 | }, | |
b226faab | 446 | { |
60f1fac2 | 447 | /* https://bugs.launchpad.net/bugs/1894667 */ |
b226faab | 448 | .callback = video_detect_force_video, |
3b6740bd | 449 | /* HP 635 Notebook */ |
b226faab AH |
450 | .matches = { |
451 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
452 | DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"), | |
453 | }, | |
454 | }, | |
3bd6bce3 HG |
455 | |
456 | /* Non win8 machines which need native backlight nevertheless */ | |
584d8d1e HG |
457 | { |
458 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */ | |
459 | .callback = video_detect_force_native, | |
3b6740bd | 460 | /* Lenovo Ideapad S405 */ |
584d8d1e HG |
461 | .matches = { |
462 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
463 | DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"), | |
464 | }, | |
465 | }, | |
96b709be JSS |
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 | }, | |
3bd6bce3 HG |
475 | { |
476 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */ | |
477 | .callback = video_detect_force_native, | |
3b6740bd | 478 | /* Lenovo Ideapad Z570 */ |
3bd6bce3 HG |
479 | .matches = { |
480 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
2d11eae4 | 481 | DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"), |
3bd6bce3 HG |
482 | }, |
483 | }, | |
53870cf0 AM |
484 | { |
485 | .callback = video_detect_force_native, | |
3b6740bd | 486 | /* Lenovo E41-25 */ |
53870cf0 AM |
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, | |
3b6740bd | 494 | /* Lenovo E41-45 */ |
53870cf0 AM |
495 | .matches = { |
496 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
497 | DMI_MATCH(DMI_PRODUCT_NAME, "82BK"), | |
498 | }, | |
499 | }, | |
bd5d93df HG |
500 | { |
501 | .callback = video_detect_force_native, | |
502 | /* Lenovo ThinkPad X131e (3371 AMD version) */ | |
503 | .matches = { | |
504 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
505 | DMI_MATCH(DMI_PRODUCT_NAME, "3371"), | |
506 | }, | |
507 | }, | |
48436f2e HG |
508 | { |
509 | .callback = video_detect_force_native, | |
510 | /* Apple iMac11,3 */ | |
511 | .matches = { | |
512 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
513 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac11,3"), | |
514 | }, | |
515 | }, | |
8cf04bb3 HG |
516 | { |
517 | /* https://gitlab.freedesktop.org/drm/amd/-/issues/1838 */ | |
518 | .callback = video_detect_force_native, | |
519 | /* Apple iMac12,1 */ | |
520 | .matches = { | |
521 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
522 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,1"), | |
523 | }, | |
524 | }, | |
525 | { | |
526 | /* https://gitlab.freedesktop.org/drm/amd/-/issues/2753 */ | |
527 | .callback = video_detect_force_native, | |
528 | /* Apple iMac12,2 */ | |
529 | .matches = { | |
530 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
531 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,2"), | |
532 | }, | |
533 | }, | |
3bd6bce3 HG |
534 | { |
535 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */ | |
536 | .callback = video_detect_force_native, | |
3b6740bd | 537 | /* Apple MacBook Pro 12,1 */ |
3bd6bce3 HG |
538 | .matches = { |
539 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
540 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"), | |
541 | }, | |
542 | }, | |
03c440a2 HG |
543 | { |
544 | .callback = video_detect_force_native, | |
545 | /* Dell Inspiron N4010 */ | |
546 | .matches = { | |
547 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
548 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N4010"), | |
549 | }, | |
550 | }, | |
4b4b3b20 HG |
551 | { |
552 | .callback = video_detect_force_native, | |
3b6740bd | 553 | /* Dell Vostro V131 */ |
4b4b3b20 HG |
554 | .matches = { |
555 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
556 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), | |
557 | }, | |
558 | }, | |
350fa038 HG |
559 | { |
560 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */ | |
561 | .callback = video_detect_force_native, | |
3b6740bd | 562 | /* Dell XPS 17 L702X */ |
350fa038 HG |
563 | .matches = { |
564 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
565 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"), | |
566 | }, | |
567 | }, | |
d37efb79 SYLF |
568 | { |
569 | .callback = video_detect_force_native, | |
3b6740bd | 570 | /* Dell Precision 7510 */ |
d37efb79 SYLF |
571 | .matches = { |
572 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
573 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"), | |
574 | }, | |
575 | }, | |
23d28cc0 HG |
576 | { |
577 | .callback = video_detect_force_native, | |
578 | /* Dell Studio 1569 */ | |
579 | .matches = { | |
580 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
581 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1569"), | |
582 | }, | |
583 | }, | |
5e7a3bf6 HG |
584 | { |
585 | .callback = video_detect_force_native, | |
586 | /* Acer Aspire 3830TG */ | |
587 | .matches = { | |
588 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
589 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3830TG"), | |
590 | }, | |
591 | }, | |
8ba5fc4c HG |
592 | { |
593 | .callback = video_detect_force_native, | |
594 | /* Acer Aspire 4810T */ | |
595 | .matches = { | |
596 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
597 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"), | |
598 | }, | |
599 | }, | |
1c8fbc1f HG |
600 | { |
601 | .callback = video_detect_force_native, | |
3b6740bd | 602 | /* Acer Aspire 5738z */ |
1c8fbc1f HG |
603 | .matches = { |
604 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
605 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"), | |
606 | DMI_MATCH(DMI_BOARD_NAME, "JV50"), | |
607 | }, | |
608 | }, | |
0172df18 HG |
609 | { |
610 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1012674 */ | |
611 | .callback = video_detect_force_native, | |
612 | /* Acer Aspire 5741 */ | |
613 | .matches = { | |
614 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
615 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"), | |
616 | }, | |
617 | }, | |
618 | { | |
619 | /* https://bugzilla.kernel.org/show_bug.cgi?id=42993 */ | |
620 | .callback = video_detect_force_native, | |
621 | /* Acer Aspire 5750 */ | |
622 | .matches = { | |
623 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
624 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"), | |
625 | }, | |
626 | }, | |
627 | { | |
628 | /* https://bugzilla.kernel.org/show_bug.cgi?id=42833 */ | |
629 | .callback = video_detect_force_native, | |
630 | /* Acer Extensa 5235 */ | |
631 | .matches = { | |
632 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
633 | DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"), | |
634 | }, | |
635 | }, | |
636 | { | |
637 | .callback = video_detect_force_native, | |
638 | /* Acer TravelMate 4750 */ | |
639 | .matches = { | |
640 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
641 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"), | |
642 | }, | |
643 | }, | |
c41c36e9 PM |
644 | { |
645 | /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */ | |
646 | .callback = video_detect_force_native, | |
3b6740bd | 647 | /* Acer TravelMate 5735Z */ |
c41c36e9 PM |
648 | .matches = { |
649 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
650 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"), | |
651 | DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"), | |
652 | }, | |
653 | }, | |
0172df18 HG |
654 | { |
655 | /* https://bugzilla.kernel.org/show_bug.cgi?id=36322 */ | |
656 | .callback = video_detect_force_native, | |
657 | /* Acer TravelMate 5760 */ | |
658 | .matches = { | |
659 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
660 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"), | |
661 | }, | |
662 | }, | |
2dfbacc6 | 663 | { |
c2d6920e HG |
664 | .callback = video_detect_force_native, |
665 | /* ASUSTeK COMPUTER INC. GA401 */ | |
666 | .matches = { | |
2dfbacc6 LJ |
667 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), |
668 | DMI_MATCH(DMI_PRODUCT_NAME, "GA401"), | |
669 | }, | |
670 | }, | |
671 | { | |
c2d6920e HG |
672 | .callback = video_detect_force_native, |
673 | /* ASUSTeK COMPUTER INC. GA502 */ | |
674 | .matches = { | |
2dfbacc6 LJ |
675 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), |
676 | DMI_MATCH(DMI_PRODUCT_NAME, "GA502"), | |
677 | }, | |
678 | }, | |
679 | { | |
c2d6920e HG |
680 | .callback = video_detect_force_native, |
681 | /* ASUSTeK COMPUTER INC. GA503 */ | |
682 | .matches = { | |
2dfbacc6 LJ |
683 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), |
684 | DMI_MATCH(DMI_PRODUCT_NAME, "GA503"), | |
685 | }, | |
686 | }, | |
e6b3086f HG |
687 | { |
688 | .callback = video_detect_force_native, | |
689 | /* Asus U46E */ | |
690 | .matches = { | |
691 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
692 | DMI_MATCH(DMI_PRODUCT_NAME, "U46E"), | |
693 | }, | |
694 | }, | |
1e3344d6 HG |
695 | { |
696 | .callback = video_detect_force_native, | |
697 | /* Asus UX303UB */ | |
698 | .matches = { | |
699 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
700 | DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"), | |
701 | }, | |
702 | }, | |
9dcb3423 HG |
703 | { |
704 | .callback = video_detect_force_native, | |
705 | /* HP EliteBook 8460p */ | |
706 | .matches = { | |
707 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
708 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8460p"), | |
709 | }, | |
710 | }, | |
d77596d4 HG |
711 | { |
712 | .callback = video_detect_force_native, | |
713 | /* HP Pavilion g6-1d80nr / B4U19UA */ | |
714 | .matches = { | |
715 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
716 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), | |
717 | DMI_MATCH(DMI_PRODUCT_SKU, "B4U19UA"), | |
718 | }, | |
719 | }, | |
8991d7d9 HG |
720 | { |
721 | .callback = video_detect_force_native, | |
722 | /* Samsung N150P */ | |
723 | .matches = { | |
724 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
725 | DMI_MATCH(DMI_PRODUCT_NAME, "N150P"), | |
726 | DMI_MATCH(DMI_BOARD_NAME, "N150P"), | |
727 | }, | |
728 | }, | |
729 | { | |
730 | .callback = video_detect_force_native, | |
731 | /* Samsung N145P/N250P/N260P */ | |
732 | .matches = { | |
733 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
734 | DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"), | |
735 | DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"), | |
736 | }, | |
737 | }, | |
738 | { | |
739 | .callback = video_detect_force_native, | |
740 | /* Samsung N250P */ | |
741 | .matches = { | |
742 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
743 | DMI_MATCH(DMI_PRODUCT_NAME, "N250P"), | |
744 | DMI_MATCH(DMI_BOARD_NAME, "N250P"), | |
745 | }, | |
746 | }, | |
84d56f32 HG |
747 | { |
748 | /* https://bugzilla.kernel.org/show_bug.cgi?id=202401 */ | |
749 | .callback = video_detect_force_native, | |
750 | /* Sony Vaio VPCEH3U1E */ | |
751 | .matches = { | |
752 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
753 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"), | |
754 | }, | |
755 | }, | |
f5a6ff92 HG |
756 | { |
757 | .callback = video_detect_force_native, | |
758 | /* Sony Vaio VPCY11S1E */ | |
759 | .matches = { | |
760 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
761 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCY11S1E"), | |
762 | }, | |
763 | }, | |
10212754 | 764 | |
c5b94f5b HG |
765 | /* |
766 | * These Toshibas have a broken acpi-video interface for brightness | |
767 | * control. They also have an issue where the panel is off after | |
768 | * suspend until a special firmware call is made to turn it back | |
769 | * on. This is handled by the toshiba_acpi kernel module, so that | |
770 | * module must be enabled for these models to work correctly. | |
771 | */ | |
772 | { | |
773 | /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ | |
774 | .callback = video_detect_force_native, | |
775 | /* Toshiba Portégé R700 */ | |
776 | .matches = { | |
777 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
778 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"), | |
779 | }, | |
780 | }, | |
781 | { | |
782 | /* Portégé: https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ | |
783 | /* Satellite: https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ | |
784 | .callback = video_detect_force_native, | |
785 | /* Toshiba Satellite/Portégé R830 */ | |
786 | .matches = { | |
787 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
788 | DMI_MATCH(DMI_PRODUCT_NAME, "R830"), | |
789 | }, | |
790 | }, | |
791 | { | |
792 | .callback = video_detect_force_native, | |
793 | /* Toshiba Satellite/Portégé Z830 */ | |
794 | .matches = { | |
795 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
796 | DMI_MATCH(DMI_PRODUCT_NAME, "Z830"), | |
797 | }, | |
798 | }, | |
799 | ||
f46acc1e HG |
800 | /* |
801 | * Models which have nvidia-ec-wmi support, but should not use it. | |
802 | * Note this indicates a likely firmware bug on these models and should | |
803 | * be revisited if/when Linux gets support for dynamic mux mode. | |
804 | */ | |
805 | { | |
806 | .callback = video_detect_force_native, | |
807 | /* Dell G15 5515 */ | |
808 | .matches = { | |
809 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
810 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5515"), | |
811 | }, | |
812 | }, | |
89b04114 CLKA |
813 | { |
814 | .callback = video_detect_force_native, | |
815 | .matches = { | |
816 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
817 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 15 3535"), | |
818 | }, | |
819 | }, | |
22c11b8f HG |
820 | |
821 | /* | |
822 | * x86 android tablets which directly control the backlight through | |
823 | * an external backlight controller, typically TI's LP8557. | |
824 | * The backlight is directly controlled by the lp855x driver on these. | |
825 | * This setup means that neither i915's native nor acpi_video backlight | |
826 | * control works. Add a "vendor" quirk to disable both. Note these | |
827 | * devices do not use vendor control in the typical meaning of | |
828 | * vendor specific SMBIOS or ACPI calls being used. | |
829 | */ | |
2ce32625 HG |
830 | { |
831 | .callback = video_detect_force_vendor, | |
832 | /* Lenovo Yoga Book X90F / X90L */ | |
833 | .matches = { | |
834 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), | |
835 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), | |
836 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"), | |
837 | }, | |
838 | }, | |
839 | { | |
840 | .callback = video_detect_force_vendor, | |
841 | /* | |
842 | * Lenovo Yoga Tablet 2 830F/L or 1050F/L (The 8" and 10" | |
843 | * Lenovo Yoga Tablet 2 use the same mainboard) | |
844 | */ | |
845 | .matches = { | |
846 | DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."), | |
847 | DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"), | |
848 | DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), | |
849 | /* Partial match on beginning of BIOS version */ | |
850 | DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"), | |
851 | }, | |
852 | }, | |
853 | { | |
854 | .callback = video_detect_force_vendor, | |
855 | /* Lenovo Yoga Tab 3 Pro YT3-X90F */ | |
856 | .matches = { | |
857 | DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), | |
858 | DMI_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), | |
859 | DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"), | |
860 | }, | |
861 | }, | |
22c11b8f HG |
862 | { |
863 | .callback = video_detect_force_vendor, | |
864 | /* Xiaomi Mi Pad 2 */ | |
865 | .matches = { | |
866 | DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"), | |
867 | DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"), | |
868 | }, | |
869 | }, | |
084940d5 CC |
870 | { }, |
871 | }; | |
872 | ||
e9cf4d9b DO |
873 | static bool google_cros_ec_present(void) |
874 | { | |
59dc2a7e | 875 | return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C"); |
e9cf4d9b DO |
876 | } |
877 | ||
a5df4252 HG |
878 | /* |
879 | * Windows 8 and newer no longer use the ACPI video interface, so it often | |
880 | * does not work. So on win8+ systems prefer native brightness control. | |
881 | * Chromebooks should always prefer native backlight control. | |
882 | */ | |
883 | static bool prefer_native_over_acpi_video(void) | |
884 | { | |
885 | return acpi_osi_is_win8() || google_cros_ec_present(); | |
886 | } | |
887 | ||
c3d6de69 | 888 | /* |
87521e16 HG |
889 | * Determine which type of backlight interface to use on this system, |
890 | * First check cmdline, then dmi quirks, then do autodetect. | |
c3d6de69 | 891 | */ |
78dfc9d1 | 892 | enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto_detect) |
c3d6de69 | 893 | { |
87521e16 | 894 | static DEFINE_MUTEX(init_mutex); |
fe7aebb4 | 895 | static bool nvidia_wmi_ec_present; |
b0935f11 | 896 | static bool apple_gmux_present; |
2600bfa3 | 897 | static bool native_available; |
87521e16 HG |
898 | static bool init_done; |
899 | static long video_caps; | |
084940d5 | 900 | |
87521e16 HG |
901 | /* Parse cmdline, dmi and acpi only once */ |
902 | mutex_lock(&init_mutex); | |
903 | if (!init_done) { | |
904 | acpi_video_parse_cmdline(); | |
084940d5 | 905 | dmi_check_system(video_detect_dmi_table); |
87521e16 | 906 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
2263576c | 907 | ACPI_UINT32_MAX, find_video, NULL, |
87521e16 | 908 | &video_caps, NULL); |
fe7aebb4 | 909 | nvidia_wmi_ec_present = nvidia_wmi_ec_supported(); |
b0935f11 | 910 | apple_gmux_present = apple_gmux_detect(NULL, NULL); |
87521e16 | 911 | init_done = true; |
c3d6de69 | 912 | } |
2600bfa3 HG |
913 | if (native) |
914 | native_available = true; | |
87521e16 HG |
915 | mutex_unlock(&init_mutex); |
916 | ||
78dfc9d1 HG |
917 | if (auto_detect) |
918 | *auto_detect = false; | |
919 | ||
b39be9f4 HG |
920 | /* |
921 | * The below heuristics / detection steps are in order of descending | |
922 | * presedence. The commandline takes presedence over anything else. | |
923 | */ | |
87521e16 HG |
924 | if (acpi_backlight_cmdline != acpi_backlight_undef) |
925 | return acpi_backlight_cmdline; | |
926 | ||
b39be9f4 | 927 | /* DMI quirks override any autodetection. */ |
87521e16 HG |
928 | if (acpi_backlight_dmi != acpi_backlight_undef) |
929 | return acpi_backlight_dmi; | |
930 | ||
78dfc9d1 HG |
931 | if (auto_detect) |
932 | *auto_detect = true; | |
933 | ||
fe7aebb4 HG |
934 | /* Special cases such as nvidia_wmi_ec and apple gmux. */ |
935 | if (nvidia_wmi_ec_present) | |
936 | return acpi_backlight_nvidia_wmi_ec; | |
937 | ||
b0935f11 | 938 | if (apple_gmux_present) |
21245df3 HG |
939 | return acpi_backlight_apple_gmux; |
940 | ||
a5df4252 HG |
941 | /* Use ACPI video if available, except when native should be preferred. */ |
942 | if ((video_caps & ACPI_VIDEO_BACKLIGHT) && | |
943 | !(native_available && prefer_native_over_acpi_video())) | |
944 | return acpi_backlight_video; | |
59dc2a7e | 945 | |
a5df4252 | 946 | /* Use native if available */ |
fb1836c9 | 947 | if (native_available) |
a5df4252 | 948 | return acpi_backlight_native; |
87521e16 | 949 | |
aa8a950a HG |
950 | /* |
951 | * The vendor specific BIOS interfaces are only necessary for | |
952 | * laptops from before ~2008. | |
953 | * | |
954 | * For laptops from ~2008 till ~2023 this point is never reached | |
955 | * because on those (video_caps & ACPI_VIDEO_BACKLIGHT) above is true. | |
956 | * | |
957 | * Laptops from after ~2023 no longer support ACPI_VIDEO_BACKLIGHT, | |
958 | * if this point is reached on those, this likely means that | |
959 | * the GPU kms driver which sets native_available has not loaded yet. | |
960 | * | |
961 | * Returning acpi_backlight_vendor in this case is known to sometimes | |
962 | * cause a non working vendor specific /sys/class/backlight device to | |
963 | * get registered. | |
964 | * | |
965 | * Return acpi_backlight_none on laptops with ACPI tables written | |
966 | * for Windows 8 (laptops from after ~2012) to avoid this problem. | |
967 | */ | |
968 | if (acpi_osi_is_win8()) | |
969 | return acpi_backlight_none; | |
970 | ||
fb1836c9 | 971 | /* No ACPI video/native (old hw), use vendor specific fw methods. */ |
b39be9f4 | 972 | return acpi_backlight_vendor; |
c3d6de69 | 973 | } |
78dfc9d1 | 974 | EXPORT_SYMBOL(__acpi_video_get_backlight_type); |