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 | * |
87521e16 HG |
20 | * Backlight drivers can use acpi_video_get_backlight_type() to determine |
21 | * which driver should handle the backlight. | |
c3d6de69 | 22 | * |
87521e16 HG |
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. | |
c3d6de69 TR |
26 | */ |
27 | ||
214f2c90 | 28 | #include <linux/export.h> |
c3d6de69 | 29 | #include <linux/acpi.h> |
87521e16 | 30 | #include <linux/backlight.h> |
c3d6de69 | 31 | #include <linux/dmi.h> |
14ca7a47 | 32 | #include <linux/module.h> |
1e4cffe7 | 33 | #include <linux/pci.h> |
87521e16 | 34 | #include <linux/types.h> |
7231ed1a | 35 | #include <linux/workqueue.h> |
87521e16 | 36 | #include <acpi/video.h> |
c3d6de69 TR |
37 | |
38 | ACPI_MODULE_NAME("video"); | |
c3d6de69 TR |
39 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
40 | ||
e7d024c0 HG |
41 | void acpi_video_unregister_backlight(void); |
42 | ||
93a291df HG |
43 | static bool backlight_notifier_registered; |
44 | static struct notifier_block backlight_nb; | |
7231ed1a | 45 | static struct work_struct backlight_notify_work; |
93a291df | 46 | |
87521e16 HG |
47 | static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef; |
48 | static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef; | |
c3d6de69 | 49 | |
14ca7a47 HG |
50 | static void acpi_video_parse_cmdline(void) |
51 | { | |
52 | if (!strcmp("vendor", acpi_video_backlight_string)) | |
87521e16 | 53 | acpi_backlight_cmdline = acpi_backlight_vendor; |
14ca7a47 | 54 | if (!strcmp("video", acpi_video_backlight_string)) |
87521e16 HG |
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; | |
14ca7a47 HG |
60 | } |
61 | ||
c3d6de69 TR |
62 | static acpi_status |
63 | find_video(acpi_handle handle, u32 lvl, void *context, void **rv) | |
64 | { | |
65 | long *cap = context; | |
1e4cffe7 | 66 | struct pci_dev *dev; |
c3d6de69 TR |
67 | struct acpi_device *acpi_dev; |
68 | ||
4a4f01a6 | 69 | static const struct acpi_device_id video_ids[] = { |
c3d6de69 TR |
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)) { | |
1e4cffe7 | 77 | dev = acpi_get_pci_dev(handle); |
c3d6de69 TR |
78 | if (!dev) |
79 | return AE_OK; | |
1e4cffe7 | 80 | pci_dev_put(dev); |
d4e1a692 | 81 | *cap |= acpi_is_video_device(handle); |
c3d6de69 TR |
82 | } |
83 | return AE_OK; | |
84 | } | |
85 | ||
084940d5 CC |
86 | /* Force to use vendor driver when the ACPI device is known to be |
87 | * buggy */ | |
88 | static int video_detect_force_vendor(const struct dmi_system_id *d) | |
89 | { | |
87521e16 | 90 | acpi_backlight_dmi = acpi_backlight_vendor; |
084940d5 CC |
91 | return 0; |
92 | } | |
93 | ||
3bd6bce3 HG |
94 | static int video_detect_force_video(const struct dmi_system_id *d) |
95 | { | |
96 | acpi_backlight_dmi = acpi_backlight_video; | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int video_detect_force_native(const struct dmi_system_id *d) | |
101 | { | |
102 | acpi_backlight_dmi = acpi_backlight_native; | |
103 | return 0; | |
104 | } | |
105 | ||
1f59ab27 AH |
106 | static int video_detect_force_none(const struct dmi_system_id *d) |
107 | { | |
108 | acpi_backlight_dmi = acpi_backlight_none; | |
109 | return 0; | |
110 | } | |
111 | ||
4a4f01a6 | 112 | static const struct dmi_system_id video_detect_dmi_table[] = { |
084940d5 CC |
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) untill 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 | }, | |
d0c2ce16 LT |
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 | }, | |
c8f6d835 BT |
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 | }, | |
3bd6bce3 HG |
144 | |
145 | /* | |
146 | * These models have a working acpi_video backlight control, and using | |
147 | * native backlight causes a regression where backlight does not work | |
148 | * when userspace is not handling brightness key events. Disable | |
149 | * native_backlight on these to fix this: | |
150 | * https://bugzilla.kernel.org/show_bug.cgi?id=81691 | |
151 | */ | |
152 | { | |
153 | .callback = video_detect_force_video, | |
154 | .ident = "ThinkPad T420", | |
155 | .matches = { | |
156 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
157 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"), | |
158 | }, | |
159 | }, | |
160 | { | |
161 | .callback = video_detect_force_video, | |
162 | .ident = "ThinkPad T520", | |
163 | .matches = { | |
164 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
165 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"), | |
166 | }, | |
167 | }, | |
168 | { | |
169 | .callback = video_detect_force_video, | |
170 | .ident = "ThinkPad X201s", | |
171 | .matches = { | |
172 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
173 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), | |
174 | }, | |
175 | }, | |
007d94ca RG |
176 | { |
177 | .callback = video_detect_force_video, | |
178 | .ident = "ThinkPad X201T", | |
179 | .matches = { | |
180 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
181 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"), | |
182 | }, | |
183 | }, | |
3bd6bce3 HG |
184 | |
185 | /* The native backlight controls do not work on some older machines */ | |
186 | { | |
187 | /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */ | |
188 | .callback = video_detect_force_video, | |
189 | .ident = "HP ENVY 15 Notebook", | |
190 | .matches = { | |
191 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
192 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"), | |
193 | }, | |
194 | }, | |
195 | { | |
196 | .callback = video_detect_force_video, | |
197 | .ident = "SAMSUNG 870Z5E/880Z5E/680Z5E", | |
198 | .matches = { | |
199 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
200 | DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"), | |
201 | }, | |
202 | }, | |
203 | { | |
204 | .callback = video_detect_force_video, | |
205 | .ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V", | |
206 | .matches = { | |
207 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
208 | DMI_MATCH(DMI_PRODUCT_NAME, | |
209 | "370R4E/370R4V/370R5E/3570RE/370R5V"), | |
210 | }, | |
211 | }, | |
212 | { | |
213 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */ | |
214 | .callback = video_detect_force_video, | |
215 | .ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV", | |
216 | .matches = { | |
217 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
218 | DMI_MATCH(DMI_PRODUCT_NAME, | |
219 | "3570R/370R/470R/450R/510R/4450RV"), | |
220 | }, | |
221 | }, | |
222 | { | |
223 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */ | |
224 | .callback = video_detect_force_video, | |
225 | .ident = "SAMSUNG 730U3E/740U3E", | |
226 | .matches = { | |
227 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
228 | DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"), | |
229 | }, | |
230 | }, | |
231 | { | |
232 | /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */ | |
233 | .callback = video_detect_force_video, | |
234 | .ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D", | |
235 | .matches = { | |
236 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
237 | DMI_MATCH(DMI_PRODUCT_NAME, | |
238 | "900X3C/900X3D/900X3E/900X4C/900X4D"), | |
239 | }, | |
240 | }, | |
61f9738d HG |
241 | { |
242 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */ | |
243 | .callback = video_detect_force_video, | |
244 | .ident = "Dell XPS14 L421X", | |
245 | .matches = { | |
246 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
247 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
248 | }, | |
249 | }, | |
3bd6bce3 HG |
250 | { |
251 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */ | |
252 | .callback = video_detect_force_video, | |
253 | .ident = "Dell XPS15 L521X", | |
254 | .matches = { | |
255 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
256 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), | |
257 | }, | |
258 | }, | |
49eb5208 AL |
259 | { |
260 | /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */ | |
261 | .callback = video_detect_force_video, | |
262 | .ident = "SAMSUNG 530U4E/540U4E", | |
263 | .matches = { | |
264 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
265 | DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"), | |
266 | }, | |
267 | }, | |
3bd6bce3 HG |
268 | |
269 | /* Non win8 machines which need native backlight nevertheless */ | |
584d8d1e HG |
270 | { |
271 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */ | |
272 | .callback = video_detect_force_native, | |
273 | .ident = "Lenovo Ideapad S405", | |
274 | .matches = { | |
275 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
276 | DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"), | |
277 | }, | |
278 | }, | |
3bd6bce3 HG |
279 | { |
280 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */ | |
281 | .callback = video_detect_force_native, | |
282 | .ident = "Lenovo Ideapad Z570", | |
283 | .matches = { | |
284 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
285 | DMI_MATCH(DMI_PRODUCT_NAME, "102434U"), | |
286 | }, | |
287 | }, | |
288 | { | |
289 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */ | |
290 | .callback = video_detect_force_native, | |
291 | .ident = "Apple MacBook Pro 12,1", | |
292 | .matches = { | |
293 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
294 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"), | |
295 | }, | |
296 | }, | |
4b4b3b20 HG |
297 | { |
298 | .callback = video_detect_force_native, | |
299 | .ident = "Dell Vostro V131", | |
300 | .matches = { | |
301 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
302 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), | |
303 | }, | |
304 | }, | |
350fa038 HG |
305 | { |
306 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */ | |
307 | .callback = video_detect_force_native, | |
308 | .ident = "Dell XPS 17 L702X", | |
309 | .matches = { | |
310 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
311 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"), | |
312 | }, | |
313 | }, | |
d37efb79 SYLF |
314 | { |
315 | .callback = video_detect_force_native, | |
316 | .ident = "Dell Precision 7510", | |
317 | .matches = { | |
318 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
319 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"), | |
320 | }, | |
321 | }, | |
1f59ab27 AH |
322 | { |
323 | .callback = video_detect_force_none, | |
324 | .ident = "Dell OptiPlex 9020M", | |
325 | .matches = { | |
326 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
327 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"), | |
328 | }, | |
329 | }, | |
084940d5 CC |
330 | { }, |
331 | }; | |
332 | ||
7231ed1a HG |
333 | /* This uses a workqueue to avoid various locking ordering issues */ |
334 | static void acpi_video_backlight_notify_work(struct work_struct *work) | |
335 | { | |
336 | if (acpi_video_get_backlight_type() != acpi_backlight_video) | |
337 | acpi_video_unregister_backlight(); | |
338 | } | |
339 | ||
93a291df HG |
340 | static int acpi_video_backlight_notify(struct notifier_block *nb, |
341 | unsigned long val, void *bd) | |
342 | { | |
343 | struct backlight_device *backlight = bd; | |
344 | ||
345 | /* A raw bl registering may change video -> native */ | |
346 | if (backlight->props.type == BACKLIGHT_RAW && | |
7231ed1a HG |
347 | val == BACKLIGHT_REGISTERED) |
348 | schedule_work(&backlight_notify_work); | |
93a291df HG |
349 | |
350 | return NOTIFY_OK; | |
351 | } | |
352 | ||
c3d6de69 | 353 | /* |
87521e16 HG |
354 | * Determine which type of backlight interface to use on this system, |
355 | * First check cmdline, then dmi quirks, then do autodetect. | |
356 | * | |
357 | * The autodetect order is: | |
358 | * 1) Is the acpi-video backlight interface supported -> | |
359 | * no, use a vendor interface | |
360 | * 2) Is this a win8 "ready" BIOS and do we have a native interface -> | |
361 | * yes, use a native interface | |
362 | * 3) Else use the acpi-video interface | |
c3d6de69 | 363 | * |
87521e16 HG |
364 | * Arguably the native on win8 check should be done first, but that would |
365 | * be a behavior change, which may causes issues. | |
c3d6de69 | 366 | */ |
87521e16 | 367 | enum acpi_backlight_type acpi_video_get_backlight_type(void) |
c3d6de69 | 368 | { |
87521e16 HG |
369 | static DEFINE_MUTEX(init_mutex); |
370 | static bool init_done; | |
371 | static long video_caps; | |
084940d5 | 372 | |
87521e16 HG |
373 | /* Parse cmdline, dmi and acpi only once */ |
374 | mutex_lock(&init_mutex); | |
375 | if (!init_done) { | |
376 | acpi_video_parse_cmdline(); | |
084940d5 | 377 | dmi_check_system(video_detect_dmi_table); |
87521e16 | 378 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
2263576c | 379 | ACPI_UINT32_MAX, find_video, NULL, |
87521e16 | 380 | &video_caps, NULL); |
7231ed1a HG |
381 | INIT_WORK(&backlight_notify_work, |
382 | acpi_video_backlight_notify_work); | |
93a291df HG |
383 | backlight_nb.notifier_call = acpi_video_backlight_notify; |
384 | backlight_nb.priority = 0; | |
385 | if (backlight_register_notifier(&backlight_nb) == 0) | |
386 | backlight_notifier_registered = true; | |
87521e16 | 387 | init_done = true; |
c3d6de69 | 388 | } |
87521e16 HG |
389 | mutex_unlock(&init_mutex); |
390 | ||
391 | if (acpi_backlight_cmdline != acpi_backlight_undef) | |
392 | return acpi_backlight_cmdline; | |
393 | ||
394 | if (acpi_backlight_dmi != acpi_backlight_undef) | |
395 | return acpi_backlight_dmi; | |
396 | ||
397 | if (!(video_caps & ACPI_VIDEO_BACKLIGHT)) | |
398 | return acpi_backlight_vendor; | |
399 | ||
01c3664d | 400 | if (acpi_osi_is_win8() && backlight_device_get_by_type(BACKLIGHT_RAW)) |
87521e16 HG |
401 | return acpi_backlight_native; |
402 | ||
403 | return acpi_backlight_video; | |
c3d6de69 | 404 | } |
87521e16 | 405 | EXPORT_SYMBOL(acpi_video_get_backlight_type); |
c3d6de69 | 406 | |
87521e16 HG |
407 | /* |
408 | * Set the preferred backlight interface type based on DMI info. | |
409 | * This function allows DMI blacklists to be implemented by external | |
410 | * platform drivers instead of putting a big blacklist in video_detect.c | |
411 | */ | |
412 | void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type) | |
c3d6de69 | 413 | { |
87521e16 | 414 | acpi_backlight_dmi = type; |
5fd677b7 HG |
415 | /* Remove acpi-video backlight interface if it is no longer desired */ |
416 | if (acpi_video_get_backlight_type() != acpi_backlight_video) | |
417 | acpi_video_unregister_backlight(); | |
f838eb5b | 418 | } |
87521e16 | 419 | EXPORT_SYMBOL(acpi_video_set_dmi_backlight_type); |
f838eb5b | 420 | |
93a291df HG |
421 | void __exit acpi_video_detect_exit(void) |
422 | { | |
423 | if (backlight_notifier_registered) | |
424 | backlight_unregister_notifier(&backlight_nb); | |
425 | } |