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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
21 * which driver should handle the backlight.
22 *
23 * If CONFIG_ACPI_VIDEO is neither set as "compiled in" (y) nor as a module (m)
24 * this file will not be compiled and acpi_video_get_backlight_type() will
25 * always return acpi_backlight_vendor.
26 */
27
28#include <linux/export.h>
29#include <linux/acpi.h>
30#include <linux/backlight.h>
31#include <linux/dmi.h>
32#include <linux/module.h>
33#include <linux/pci.h>
34#include <linux/types.h>
35#include <linux/workqueue.h>
36#include <acpi/video.h>
37
38ACPI_MODULE_NAME("video");
39#define _COMPONENT ACPI_VIDEO_COMPONENT
40
41void acpi_video_unregister_backlight(void);
42
43static bool backlight_notifier_registered;
44static struct notifier_block backlight_nb;
45static struct work_struct backlight_notify_work;
46
47static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef;
48static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef;
49
50static void acpi_video_parse_cmdline(void)
51{
52 if (!strcmp("vendor", acpi_video_backlight_string))
53 acpi_backlight_cmdline = acpi_backlight_vendor;
54 if (!strcmp("video", acpi_video_backlight_string))
55 acpi_backlight_cmdline = acpi_backlight_video;
56 if (!strcmp("native", acpi_video_backlight_string))
57 acpi_backlight_cmdline = acpi_backlight_native;
58 if (!strcmp("none", acpi_video_backlight_string))
59 acpi_backlight_cmdline = acpi_backlight_none;
60}
61
62static acpi_status
63find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
64{
65 long *cap = context;
66 struct pci_dev *dev;
67 struct acpi_device *acpi_dev;
68
69 static const struct acpi_device_id video_ids[] = {
70 {ACPI_VIDEO_HID, 0},
71 {"", 0},
72 };
73 if (acpi_bus_get_device(handle, &acpi_dev))
74 return AE_OK;
75
76 if (!acpi_match_device_ids(acpi_dev, video_ids)) {
77 dev = acpi_get_pci_dev(handle);
78 if (!dev)
79 return AE_OK;
80 pci_dev_put(dev);
81 *cap |= acpi_is_video_device(handle);
82 }
83 return AE_OK;
84}
85
86/* Force to use vendor driver when the ACPI device is known to be
87 * buggy */
88static int video_detect_force_vendor(const struct dmi_system_id *d)
89{
90 acpi_backlight_dmi = acpi_backlight_vendor;
91 return 0;
92}
93
94static int video_detect_force_video(const struct dmi_system_id *d)
95{
96 acpi_backlight_dmi = acpi_backlight_video;
97 return 0;
98}
99
100static int video_detect_force_native(const struct dmi_system_id *d)
101{
102 acpi_backlight_dmi = acpi_backlight_native;
103 return 0;
104}
105
106static int video_detect_force_none(const struct dmi_system_id *d)
107{
108 acpi_backlight_dmi = acpi_backlight_none;
109 return 0;
110}
111
112static const struct dmi_system_id video_detect_dmi_table[] = {
113 /* On Samsung X360, the BIOS will set a flag (VDRV) if generic
114 * ACPI backlight device is used. This flag will definitively break
115 * the backlight interface (even the vendor interface) until next
116 * reboot. It's why we should prevent video.ko from being used here
117 * and we can't rely on a later call to acpi_video_unregister().
118 */
119 {
120 .callback = video_detect_force_vendor,
121 .ident = "X360",
122 .matches = {
123 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
124 DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
125 DMI_MATCH(DMI_BOARD_NAME, "X360"),
126 },
127 },
128 {
129 .callback = video_detect_force_vendor,
130 .ident = "Asus UL30VT",
131 .matches = {
132 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
133 DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"),
134 },
135 },
136 {
137 .callback = video_detect_force_vendor,
138 .ident = "Asus UL30A",
139 .matches = {
140 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
141 DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"),
142 },
143 },
144 {
145 .callback = video_detect_force_vendor,
146 .ident = "Sony VPCEH3U1E",
147 .matches = {
148 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
149 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"),
150 },
151 },
152
153 /*
154 * These models have a working acpi_video backlight control, and using
155 * native backlight causes a regression where backlight does not work
156 * when userspace is not handling brightness key events. Disable
157 * native_backlight on these to fix this:
158 * https://bugzilla.kernel.org/show_bug.cgi?id=81691
159 */
160 {
161 .callback = video_detect_force_video,
162 .ident = "ThinkPad T420",
163 .matches = {
164 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
165 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
166 },
167 },
168 {
169 .callback = video_detect_force_video,
170 .ident = "ThinkPad T520",
171 .matches = {
172 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
173 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"),
174 },
175 },
176 {
177 .callback = video_detect_force_video,
178 .ident = "ThinkPad X201s",
179 .matches = {
180 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
181 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
182 },
183 },
184 {
185 .callback = video_detect_force_video,
186 .ident = "ThinkPad X201T",
187 .matches = {
188 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
189 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"),
190 },
191 },
192
193 /* The native backlight controls do not work on some older machines */
194 {
195 /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */
196 .callback = video_detect_force_video,
197 .ident = "HP ENVY 15 Notebook",
198 .matches = {
199 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
200 DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"),
201 },
202 },
203 {
204 .callback = video_detect_force_video,
205 .ident = "SAMSUNG 870Z5E/880Z5E/680Z5E",
206 .matches = {
207 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
208 DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"),
209 },
210 },
211 {
212 .callback = video_detect_force_video,
213 .ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V",
214 .matches = {
215 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
216 DMI_MATCH(DMI_PRODUCT_NAME,
217 "370R4E/370R4V/370R5E/3570RE/370R5V"),
218 },
219 },
220 {
221 /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
222 .callback = video_detect_force_video,
223 .ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV",
224 .matches = {
225 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
226 DMI_MATCH(DMI_PRODUCT_NAME,
227 "3570R/370R/470R/450R/510R/4450RV"),
228 },
229 },
230 {
231 /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */
232 .callback = video_detect_force_video,
233 .ident = "SAMSUNG 670Z5E",
234 .matches = {
235 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
236 DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"),
237 },
238 },
239 {
240 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
241 .callback = video_detect_force_video,
242 .ident = "SAMSUNG 730U3E/740U3E",
243 .matches = {
244 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
245 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
246 },
247 },
248 {
249 /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
250 .callback = video_detect_force_video,
251 .ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D",
252 .matches = {
253 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
254 DMI_MATCH(DMI_PRODUCT_NAME,
255 "900X3C/900X3D/900X3E/900X4C/900X4D"),
256 },
257 },
258 {
259 /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */
260 .callback = video_detect_force_video,
261 .ident = "Dell XPS14 L421X",
262 .matches = {
263 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
264 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"),
265 },
266 },
267 {
268 /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
269 .callback = video_detect_force_video,
270 .ident = "Dell XPS15 L521X",
271 .matches = {
272 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
273 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
274 },
275 },
276 {
277 /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */
278 .callback = video_detect_force_video,
279 .ident = "SAMSUNG 530U4E/540U4E",
280 .matches = {
281 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
282 DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
283 },
284 },
285
286 /* Non win8 machines which need native backlight nevertheless */
287 {
288 /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */
289 .callback = video_detect_force_native,
290 .ident = "Lenovo Ideapad S405",
291 .matches = {
292 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
293 DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
294 },
295 },
296 {
297 /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
298 .callback = video_detect_force_native,
299 .ident = "Lenovo Ideapad Z570",
300 .matches = {
301 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
302 DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
303 },
304 },
305 {
306 .callback = video_detect_force_native,
307 .ident = "Lenovo E41-25",
308 .matches = {
309 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
310 DMI_MATCH(DMI_PRODUCT_NAME, "81FS"),
311 },
312 },
313 {
314 .callback = video_detect_force_native,
315 .ident = "Lenovo E41-45",
316 .matches = {
317 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
318 DMI_MATCH(DMI_PRODUCT_NAME, "82BK"),
319 },
320 },
321 {
322 /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
323 .callback = video_detect_force_native,
324 .ident = "Apple MacBook Pro 12,1",
325 .matches = {
326 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
327 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
328 },
329 },
330 {
331 .callback = video_detect_force_native,
332 .ident = "Dell Vostro V131",
333 .matches = {
334 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
335 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
336 },
337 },
338 {
339 /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */
340 .callback = video_detect_force_native,
341 .ident = "Dell XPS 17 L702X",
342 .matches = {
343 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
344 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
345 },
346 },
347 {
348 .callback = video_detect_force_native,
349 .ident = "Dell Precision 7510",
350 .matches = {
351 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
352 DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
353 },
354 },
355 {
356 .callback = video_detect_force_native,
357 .ident = "Acer Aspire 5738z",
358 .matches = {
359 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
360 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"),
361 DMI_MATCH(DMI_BOARD_NAME, "JV50"),
362 },
363 },
364 {
365 /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */
366 .callback = video_detect_force_native,
367 .ident = "Acer TravelMate 5735Z",
368 .matches = {
369 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
370 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"),
371 DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"),
372 },
373 },
374
375 /*
376 * Desktops which falsely report a backlight and which our heuristics
377 * for this do not catch.
378 */
379 {
380 .callback = video_detect_force_none,
381 .ident = "Dell OptiPlex 9020M",
382 .matches = {
383 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
384 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"),
385 },
386 },
387 {
388 .callback = video_detect_force_none,
389 .ident = "MSI MS-7721",
390 .matches = {
391 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
392 DMI_MATCH(DMI_PRODUCT_NAME, "MS-7721"),
393 },
394 },
395 { },
396};
397
398/* This uses a workqueue to avoid various locking ordering issues */
399static void acpi_video_backlight_notify_work(struct work_struct *work)
400{
401 if (acpi_video_get_backlight_type() != acpi_backlight_video)
402 acpi_video_unregister_backlight();
403}
404
405static int acpi_video_backlight_notify(struct notifier_block *nb,
406 unsigned long val, void *bd)
407{
408 struct backlight_device *backlight = bd;
409
410 /* A raw bl registering may change video -> native */
411 if (backlight->props.type == BACKLIGHT_RAW &&
412 val == BACKLIGHT_REGISTERED)
413 schedule_work(&backlight_notify_work);
414
415 return NOTIFY_OK;
416}
417
418/*
419 * Determine which type of backlight interface to use on this system,
420 * First check cmdline, then dmi quirks, then do autodetect.
421 *
422 * The autodetect order is:
423 * 1) Is the acpi-video backlight interface supported ->
424 * no, use a vendor interface
425 * 2) Is this a win8 "ready" BIOS and do we have a native interface ->
426 * yes, use a native interface
427 * 3) Else use the acpi-video interface
428 *
429 * Arguably the native on win8 check should be done first, but that would
430 * be a behavior change, which may causes issues.
431 */
432enum acpi_backlight_type acpi_video_get_backlight_type(void)
433{
434 static DEFINE_MUTEX(init_mutex);
435 static bool init_done;
436 static long video_caps;
437
438 /* Parse cmdline, dmi and acpi only once */
439 mutex_lock(&init_mutex);
440 if (!init_done) {
441 acpi_video_parse_cmdline();
442 dmi_check_system(video_detect_dmi_table);
443 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
444 ACPI_UINT32_MAX, find_video, NULL,
445 &video_caps, NULL);
446 INIT_WORK(&backlight_notify_work,
447 acpi_video_backlight_notify_work);
448 backlight_nb.notifier_call = acpi_video_backlight_notify;
449 backlight_nb.priority = 0;
450 if (backlight_register_notifier(&backlight_nb) == 0)
451 backlight_notifier_registered = true;
452 init_done = true;
453 }
454 mutex_unlock(&init_mutex);
455
456 if (acpi_backlight_cmdline != acpi_backlight_undef)
457 return acpi_backlight_cmdline;
458
459 if (acpi_backlight_dmi != acpi_backlight_undef)
460 return acpi_backlight_dmi;
461
462 if (!(video_caps & ACPI_VIDEO_BACKLIGHT))
463 return acpi_backlight_vendor;
464
465 if (acpi_osi_is_win8() && backlight_device_get_by_type(BACKLIGHT_RAW))
466 return acpi_backlight_native;
467
468 return acpi_backlight_video;
469}
470EXPORT_SYMBOL(acpi_video_get_backlight_type);
471
472/*
473 * Set the preferred backlight interface type based on DMI info.
474 * This function allows DMI blacklists to be implemented by external
475 * platform drivers instead of putting a big blacklist in video_detect.c
476 */
477void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
478{
479 acpi_backlight_dmi = type;
480 /* Remove acpi-video backlight interface if it is no longer desired */
481 if (acpi_video_get_backlight_type() != acpi_backlight_video)
482 acpi_video_unregister_backlight();
483}
484EXPORT_SYMBOL(acpi_video_set_dmi_backlight_type);
485
486void __exit acpi_video_detect_exit(void)
487{
488 if (backlight_notifier_registered)
489 backlight_unregister_notifier(&backlight_nb);
490}
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
42static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef;
43static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef;
44
45static 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
61static acpi_status
62find_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
85static 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
107static 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 */
115static int video_detect_force_vendor(const struct dmi_system_id *d)
116{
117 acpi_backlight_dmi = acpi_backlight_vendor;
118 return 0;
119}
120
121static int video_detect_force_video(const struct dmi_system_id *d)
122{
123 acpi_backlight_dmi = acpi_backlight_video;
124 return 0;
125}
126
127static int video_detect_force_native(const struct dmi_system_id *d)
128{
129 acpi_backlight_dmi = acpi_backlight_native;
130 return 0;
131}
132
133static 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
143static 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 ThinkPad X131e (3371 AMD version) */
503 .matches = {
504 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
505 DMI_MATCH(DMI_PRODUCT_NAME, "3371"),
506 },
507 },
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 },
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 },
534 {
535 /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
536 .callback = video_detect_force_native,
537 /* Apple MacBook Pro 12,1 */
538 .matches = {
539 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
540 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
541 },
542 },
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 },
551 {
552 .callback = video_detect_force_native,
553 /* Dell Vostro V131 */
554 .matches = {
555 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
556 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
557 },
558 },
559 {
560 /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */
561 .callback = video_detect_force_native,
562 /* Dell XPS 17 L702X */
563 .matches = {
564 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
565 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
566 },
567 },
568 {
569 .callback = video_detect_force_native,
570 /* Dell Precision 7510 */
571 .matches = {
572 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
573 DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
574 },
575 },
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 },
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 },
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 },
600 {
601 .callback = video_detect_force_native,
602 /* Acer Aspire 5738z */
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 },
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 },
644 {
645 /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */
646 .callback = video_detect_force_native,
647 /* Acer TravelMate 5735Z */
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 },
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 },
663 {
664 .callback = video_detect_force_native,
665 /* ASUSTeK COMPUTER INC. GA401 */
666 .matches = {
667 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
668 DMI_MATCH(DMI_PRODUCT_NAME, "GA401"),
669 },
670 },
671 {
672 .callback = video_detect_force_native,
673 /* ASUSTeK COMPUTER INC. GA502 */
674 .matches = {
675 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
676 DMI_MATCH(DMI_PRODUCT_NAME, "GA502"),
677 },
678 },
679 {
680 .callback = video_detect_force_native,
681 /* ASUSTeK COMPUTER INC. GA503 */
682 .matches = {
683 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
684 DMI_MATCH(DMI_PRODUCT_NAME, "GA503"),
685 },
686 },
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 },
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 },
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 },
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 },
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 },
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 },
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 },
764
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
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 },
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 },
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 */
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 },
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 },
870 { },
871};
872
873static bool google_cros_ec_present(void)
874{
875 return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C");
876}
877
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 */
883static bool prefer_native_over_acpi_video(void)
884{
885 return acpi_osi_is_win8() || google_cros_ec_present();
886}
887
888/*
889 * Determine which type of backlight interface to use on this system,
890 * First check cmdline, then dmi quirks, then do autodetect.
891 */
892enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, bool *auto_detect)
893{
894 static DEFINE_MUTEX(init_mutex);
895 static bool nvidia_wmi_ec_present;
896 static bool apple_gmux_present;
897 static bool native_available;
898 static bool init_done;
899 static long video_caps;
900
901 /* Parse cmdline, dmi and acpi only once */
902 mutex_lock(&init_mutex);
903 if (!init_done) {
904 acpi_video_parse_cmdline();
905 dmi_check_system(video_detect_dmi_table);
906 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
907 ACPI_UINT32_MAX, find_video, NULL,
908 &video_caps, NULL);
909 nvidia_wmi_ec_present = nvidia_wmi_ec_supported();
910 apple_gmux_present = apple_gmux_detect(NULL, NULL);
911 init_done = true;
912 }
913 if (native)
914 native_available = true;
915 mutex_unlock(&init_mutex);
916
917 if (auto_detect)
918 *auto_detect = false;
919
920 /*
921 * The below heuristics / detection steps are in order of descending
922 * presedence. The commandline takes presedence over anything else.
923 */
924 if (acpi_backlight_cmdline != acpi_backlight_undef)
925 return acpi_backlight_cmdline;
926
927 /* DMI quirks override any autodetection. */
928 if (acpi_backlight_dmi != acpi_backlight_undef)
929 return acpi_backlight_dmi;
930
931 if (auto_detect)
932 *auto_detect = true;
933
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
938 if (apple_gmux_present)
939 return acpi_backlight_apple_gmux;
940
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;
945
946 /* Use native if available */
947 if (native_available)
948 return acpi_backlight_native;
949
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
971 /* No ACPI video/native (old hw), use vendor specific fw methods. */
972 return acpi_backlight_vendor;
973}
974EXPORT_SYMBOL(__acpi_video_get_backlight_type);