]>
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 HG |
34 | #include <linux/types.h> |
35 | #include <acpi/video.h> | |
c3d6de69 TR |
36 | |
37 | ACPI_MODULE_NAME("video"); | |
c3d6de69 TR |
38 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
39 | ||
93a291df HG |
40 | static bool backlight_notifier_registered; |
41 | static struct notifier_block backlight_nb; | |
42 | ||
87521e16 HG |
43 | static enum acpi_backlight_type acpi_backlight_cmdline = acpi_backlight_undef; |
44 | static enum acpi_backlight_type acpi_backlight_dmi = acpi_backlight_undef; | |
c3d6de69 | 45 | |
14ca7a47 HG |
46 | static void acpi_video_parse_cmdline(void) |
47 | { | |
48 | if (!strcmp("vendor", acpi_video_backlight_string)) | |
87521e16 | 49 | acpi_backlight_cmdline = acpi_backlight_vendor; |
14ca7a47 | 50 | if (!strcmp("video", acpi_video_backlight_string)) |
87521e16 HG |
51 | acpi_backlight_cmdline = acpi_backlight_video; |
52 | if (!strcmp("native", acpi_video_backlight_string)) | |
53 | acpi_backlight_cmdline = acpi_backlight_native; | |
54 | if (!strcmp("none", acpi_video_backlight_string)) | |
55 | acpi_backlight_cmdline = acpi_backlight_none; | |
14ca7a47 HG |
56 | } |
57 | ||
c3d6de69 TR |
58 | static acpi_status |
59 | find_video(acpi_handle handle, u32 lvl, void *context, void **rv) | |
60 | { | |
61 | long *cap = context; | |
1e4cffe7 | 62 | struct pci_dev *dev; |
c3d6de69 TR |
63 | struct acpi_device *acpi_dev; |
64 | ||
4a4f01a6 | 65 | static const struct acpi_device_id video_ids[] = { |
c3d6de69 TR |
66 | {ACPI_VIDEO_HID, 0}, |
67 | {"", 0}, | |
68 | }; | |
69 | if (acpi_bus_get_device(handle, &acpi_dev)) | |
70 | return AE_OK; | |
71 | ||
72 | if (!acpi_match_device_ids(acpi_dev, video_ids)) { | |
1e4cffe7 | 73 | dev = acpi_get_pci_dev(handle); |
c3d6de69 TR |
74 | if (!dev) |
75 | return AE_OK; | |
1e4cffe7 | 76 | pci_dev_put(dev); |
d4e1a692 | 77 | *cap |= acpi_is_video_device(handle); |
c3d6de69 TR |
78 | } |
79 | return AE_OK; | |
80 | } | |
81 | ||
084940d5 CC |
82 | /* Force to use vendor driver when the ACPI device is known to be |
83 | * buggy */ | |
84 | static int video_detect_force_vendor(const struct dmi_system_id *d) | |
85 | { | |
87521e16 | 86 | acpi_backlight_dmi = acpi_backlight_vendor; |
084940d5 CC |
87 | return 0; |
88 | } | |
89 | ||
3bd6bce3 HG |
90 | static int video_detect_force_video(const struct dmi_system_id *d) |
91 | { | |
92 | acpi_backlight_dmi = acpi_backlight_video; | |
93 | return 0; | |
94 | } | |
95 | ||
96 | static int video_detect_force_native(const struct dmi_system_id *d) | |
97 | { | |
98 | acpi_backlight_dmi = acpi_backlight_native; | |
99 | return 0; | |
100 | } | |
101 | ||
4a4f01a6 | 102 | static const struct dmi_system_id video_detect_dmi_table[] = { |
084940d5 CC |
103 | /* On Samsung X360, the BIOS will set a flag (VDRV) if generic |
104 | * ACPI backlight device is used. This flag will definitively break | |
105 | * the backlight interface (even the vendor interface) untill next | |
106 | * reboot. It's why we should prevent video.ko from being used here | |
107 | * and we can't rely on a later call to acpi_video_unregister(). | |
108 | */ | |
109 | { | |
110 | .callback = video_detect_force_vendor, | |
111 | .ident = "X360", | |
112 | .matches = { | |
113 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
114 | DMI_MATCH(DMI_PRODUCT_NAME, "X360"), | |
115 | DMI_MATCH(DMI_BOARD_NAME, "X360"), | |
116 | }, | |
117 | }, | |
d0c2ce16 LT |
118 | { |
119 | .callback = video_detect_force_vendor, | |
120 | .ident = "Asus UL30VT", | |
121 | .matches = { | |
122 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
123 | DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"), | |
124 | }, | |
125 | }, | |
c8f6d835 BT |
126 | { |
127 | .callback = video_detect_force_vendor, | |
128 | .ident = "Asus UL30A", | |
129 | .matches = { | |
130 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
131 | DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"), | |
132 | }, | |
133 | }, | |
08a56226 EL |
134 | { |
135 | .callback = video_detect_force_vendor, | |
136 | .ident = "Dell Inspiron 5737", | |
137 | .matches = { | |
138 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
139 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5737"), | |
140 | }, | |
141 | }, | |
3bd6bce3 HG |
142 | |
143 | /* | |
144 | * These models have a working acpi_video backlight control, and using | |
145 | * native backlight causes a regression where backlight does not work | |
146 | * when userspace is not handling brightness key events. Disable | |
147 | * native_backlight on these to fix this: | |
148 | * https://bugzilla.kernel.org/show_bug.cgi?id=81691 | |
149 | */ | |
150 | { | |
151 | .callback = video_detect_force_video, | |
152 | .ident = "ThinkPad T420", | |
153 | .matches = { | |
154 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
155 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"), | |
156 | }, | |
157 | }, | |
158 | { | |
159 | .callback = video_detect_force_video, | |
160 | .ident = "ThinkPad T520", | |
161 | .matches = { | |
162 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
163 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"), | |
164 | }, | |
165 | }, | |
166 | { | |
167 | .callback = video_detect_force_video, | |
168 | .ident = "ThinkPad X201s", | |
169 | .matches = { | |
170 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
171 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), | |
172 | }, | |
173 | }, | |
174 | ||
175 | /* The native backlight controls do not work on some older machines */ | |
176 | { | |
177 | /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */ | |
178 | .callback = video_detect_force_video, | |
179 | .ident = "HP ENVY 15 Notebook", | |
180 | .matches = { | |
181 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
182 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"), | |
183 | }, | |
184 | }, | |
185 | { | |
186 | .callback = video_detect_force_video, | |
187 | .ident = "SAMSUNG 870Z5E/880Z5E/680Z5E", | |
188 | .matches = { | |
189 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
190 | DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"), | |
191 | }, | |
192 | }, | |
193 | { | |
194 | .callback = video_detect_force_video, | |
195 | .ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V", | |
196 | .matches = { | |
197 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
198 | DMI_MATCH(DMI_PRODUCT_NAME, | |
199 | "370R4E/370R4V/370R5E/3570RE/370R5V"), | |
200 | }, | |
201 | }, | |
202 | { | |
203 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */ | |
204 | .callback = video_detect_force_video, | |
205 | .ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV", | |
206 | .matches = { | |
207 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
208 | DMI_MATCH(DMI_PRODUCT_NAME, | |
209 | "3570R/370R/470R/450R/510R/4450RV"), | |
210 | }, | |
211 | }, | |
212 | { | |
213 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */ | |
214 | .callback = video_detect_force_video, | |
215 | .ident = "SAMSUNG 730U3E/740U3E", | |
216 | .matches = { | |
217 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
218 | DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"), | |
219 | }, | |
220 | }, | |
221 | { | |
222 | /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */ | |
223 | .callback = video_detect_force_video, | |
224 | .ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D", | |
225 | .matches = { | |
226 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
227 | DMI_MATCH(DMI_PRODUCT_NAME, | |
228 | "900X3C/900X3D/900X3E/900X4C/900X4D"), | |
229 | }, | |
230 | }, | |
231 | { | |
232 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */ | |
233 | .callback = video_detect_force_video, | |
234 | .ident = "Dell XPS15 L521X", | |
235 | .matches = { | |
236 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
237 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), | |
238 | }, | |
239 | }, | |
240 | ||
241 | /* Non win8 machines which need native backlight nevertheless */ | |
242 | { | |
243 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */ | |
244 | .callback = video_detect_force_native, | |
245 | .ident = "Lenovo Ideapad Z570", | |
246 | .matches = { | |
247 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
248 | DMI_MATCH(DMI_PRODUCT_NAME, "102434U"), | |
249 | }, | |
250 | }, | |
251 | { | |
252 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */ | |
253 | .callback = video_detect_force_native, | |
254 | .ident = "Apple MacBook Pro 12,1", | |
255 | .matches = { | |
256 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
257 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"), | |
258 | }, | |
259 | }, | |
084940d5 CC |
260 | { }, |
261 | }; | |
262 | ||
93a291df HG |
263 | static int acpi_video_backlight_notify(struct notifier_block *nb, |
264 | unsigned long val, void *bd) | |
265 | { | |
266 | struct backlight_device *backlight = bd; | |
267 | ||
268 | /* A raw bl registering may change video -> native */ | |
269 | if (backlight->props.type == BACKLIGHT_RAW && | |
270 | val == BACKLIGHT_REGISTERED && | |
271 | acpi_video_get_backlight_type() != acpi_backlight_video) | |
272 | acpi_video_unregister_backlight(); | |
273 | ||
274 | return NOTIFY_OK; | |
275 | } | |
276 | ||
c3d6de69 | 277 | /* |
87521e16 HG |
278 | * Determine which type of backlight interface to use on this system, |
279 | * First check cmdline, then dmi quirks, then do autodetect. | |
280 | * | |
281 | * The autodetect order is: | |
282 | * 1) Is the acpi-video backlight interface supported -> | |
283 | * no, use a vendor interface | |
284 | * 2) Is this a win8 "ready" BIOS and do we have a native interface -> | |
285 | * yes, use a native interface | |
286 | * 3) Else use the acpi-video interface | |
c3d6de69 | 287 | * |
87521e16 HG |
288 | * Arguably the native on win8 check should be done first, but that would |
289 | * be a behavior change, which may causes issues. | |
c3d6de69 | 290 | */ |
87521e16 | 291 | enum acpi_backlight_type acpi_video_get_backlight_type(void) |
c3d6de69 | 292 | { |
87521e16 HG |
293 | static DEFINE_MUTEX(init_mutex); |
294 | static bool init_done; | |
295 | static long video_caps; | |
084940d5 | 296 | |
87521e16 HG |
297 | /* Parse cmdline, dmi and acpi only once */ |
298 | mutex_lock(&init_mutex); | |
299 | if (!init_done) { | |
300 | acpi_video_parse_cmdline(); | |
084940d5 | 301 | dmi_check_system(video_detect_dmi_table); |
87521e16 | 302 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
2263576c | 303 | ACPI_UINT32_MAX, find_video, NULL, |
87521e16 | 304 | &video_caps, NULL); |
93a291df HG |
305 | backlight_nb.notifier_call = acpi_video_backlight_notify; |
306 | backlight_nb.priority = 0; | |
307 | if (backlight_register_notifier(&backlight_nb) == 0) | |
308 | backlight_notifier_registered = true; | |
87521e16 | 309 | init_done = true; |
c3d6de69 | 310 | } |
87521e16 HG |
311 | mutex_unlock(&init_mutex); |
312 | ||
313 | if (acpi_backlight_cmdline != acpi_backlight_undef) | |
314 | return acpi_backlight_cmdline; | |
315 | ||
316 | if (acpi_backlight_dmi != acpi_backlight_undef) | |
317 | return acpi_backlight_dmi; | |
318 | ||
319 | if (!(video_caps & ACPI_VIDEO_BACKLIGHT)) | |
320 | return acpi_backlight_vendor; | |
321 | ||
322 | if (acpi_osi_is_win8() && backlight_device_registered(BACKLIGHT_RAW)) | |
323 | return acpi_backlight_native; | |
324 | ||
325 | return acpi_backlight_video; | |
c3d6de69 | 326 | } |
87521e16 | 327 | EXPORT_SYMBOL(acpi_video_get_backlight_type); |
c3d6de69 | 328 | |
87521e16 HG |
329 | /* |
330 | * Set the preferred backlight interface type based on DMI info. | |
331 | * This function allows DMI blacklists to be implemented by external | |
332 | * platform drivers instead of putting a big blacklist in video_detect.c | |
333 | */ | |
334 | void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type) | |
c3d6de69 | 335 | { |
87521e16 | 336 | acpi_backlight_dmi = type; |
5fd677b7 HG |
337 | /* Remove acpi-video backlight interface if it is no longer desired */ |
338 | if (acpi_video_get_backlight_type() != acpi_backlight_video) | |
339 | acpi_video_unregister_backlight(); | |
f838eb5b | 340 | } |
87521e16 | 341 | EXPORT_SYMBOL(acpi_video_set_dmi_backlight_type); |
f838eb5b | 342 | |
93a291df HG |
343 | void __exit acpi_video_detect_exit(void) |
344 | { | |
345 | if (backlight_notifier_registered) | |
346 | backlight_unregister_notifier(&backlight_nb); | |
347 | } |