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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 const struct dmi_system_id video_detect_dmi_table[] = {
107 /* On Samsung X360, the BIOS will set a flag (VDRV) if generic
108 * ACPI backlight device is used. This flag will definitively break
109 * the backlight interface (even the vendor interface) untill next
110 * reboot. It's why we should prevent video.ko from being used here
111 * and we can't rely on a later call to acpi_video_unregister().
112 */
113 {
114 .callback = video_detect_force_vendor,
115 .ident = "X360",
116 .matches = {
117 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
118 DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
119 DMI_MATCH(DMI_BOARD_NAME, "X360"),
120 },
121 },
122 {
123 .callback = video_detect_force_vendor,
124 .ident = "Asus UL30VT",
125 .matches = {
126 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
127 DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"),
128 },
129 },
130 {
131 .callback = video_detect_force_vendor,
132 .ident = "Asus UL30A",
133 .matches = {
134 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
135 DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"),
136 },
137 },
138
139 /*
140 * These models have a working acpi_video backlight control, and using
141 * native backlight causes a regression where backlight does not work
142 * when userspace is not handling brightness key events. Disable
143 * native_backlight on these to fix this:
144 * https://bugzilla.kernel.org/show_bug.cgi?id=81691
145 */
146 {
147 .callback = video_detect_force_video,
148 .ident = "ThinkPad T420",
149 .matches = {
150 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
151 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
152 },
153 },
154 {
155 .callback = video_detect_force_video,
156 .ident = "ThinkPad T520",
157 .matches = {
158 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
159 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"),
160 },
161 },
162 {
163 .callback = video_detect_force_video,
164 .ident = "ThinkPad X201s",
165 .matches = {
166 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
167 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
168 },
169 },
170
171 /* The native backlight controls do not work on some older machines */
172 {
173 /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */
174 .callback = video_detect_force_video,
175 .ident = "HP ENVY 15 Notebook",
176 .matches = {
177 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
178 DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"),
179 },
180 },
181 {
182 .callback = video_detect_force_video,
183 .ident = "SAMSUNG 870Z5E/880Z5E/680Z5E",
184 .matches = {
185 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
186 DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"),
187 },
188 },
189 {
190 .callback = video_detect_force_video,
191 .ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V",
192 .matches = {
193 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
194 DMI_MATCH(DMI_PRODUCT_NAME,
195 "370R4E/370R4V/370R5E/3570RE/370R5V"),
196 },
197 },
198 {
199 /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
200 .callback = video_detect_force_video,
201 .ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV",
202 .matches = {
203 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
204 DMI_MATCH(DMI_PRODUCT_NAME,
205 "3570R/370R/470R/450R/510R/4450RV"),
206 },
207 },
208 {
209 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
210 .callback = video_detect_force_video,
211 .ident = "SAMSUNG 730U3E/740U3E",
212 .matches = {
213 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
214 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
215 },
216 },
217 {
218 /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
219 .callback = video_detect_force_video,
220 .ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D",
221 .matches = {
222 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
223 DMI_MATCH(DMI_PRODUCT_NAME,
224 "900X3C/900X3D/900X3E/900X4C/900X4D"),
225 },
226 },
227 {
228 /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */
229 .callback = video_detect_force_video,
230 .ident = "Dell XPS14 L421X",
231 .matches = {
232 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
233 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"),
234 },
235 },
236 {
237 /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
238 .callback = video_detect_force_video,
239 .ident = "Dell XPS15 L521X",
240 .matches = {
241 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
242 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
243 },
244 },
245 {
246 /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */
247 .callback = video_detect_force_video,
248 .ident = "SAMSUNG 530U4E/540U4E",
249 .matches = {
250 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
251 DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
252 },
253 },
254
255 /* Non win8 machines which need native backlight nevertheless */
256 {
257 /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */
258 .callback = video_detect_force_native,
259 .ident = "Lenovo Ideapad S405",
260 .matches = {
261 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
262 DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
263 },
264 },
265 {
266 /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
267 .callback = video_detect_force_native,
268 .ident = "Lenovo Ideapad Z570",
269 .matches = {
270 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
271 DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
272 },
273 },
274 {
275 /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
276 .callback = video_detect_force_native,
277 .ident = "Apple MacBook Pro 12,1",
278 .matches = {
279 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
280 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
281 },
282 },
283 {
284 .callback = video_detect_force_native,
285 .ident = "Dell Vostro V131",
286 .matches = {
287 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
288 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
289 },
290 },
291 { },
292};
293
294/* This uses a workqueue to avoid various locking ordering issues */
295static void acpi_video_backlight_notify_work(struct work_struct *work)
296{
297 if (acpi_video_get_backlight_type() != acpi_backlight_video)
298 acpi_video_unregister_backlight();
299}
300
301static int acpi_video_backlight_notify(struct notifier_block *nb,
302 unsigned long val, void *bd)
303{
304 struct backlight_device *backlight = bd;
305
306 /* A raw bl registering may change video -> native */
307 if (backlight->props.type == BACKLIGHT_RAW &&
308 val == BACKLIGHT_REGISTERED)
309 schedule_work(&backlight_notify_work);
310
311 return NOTIFY_OK;
312}
313
314/*
315 * Determine which type of backlight interface to use on this system,
316 * First check cmdline, then dmi quirks, then do autodetect.
317 *
318 * The autodetect order is:
319 * 1) Is the acpi-video backlight interface supported ->
320 * no, use a vendor interface
321 * 2) Is this a win8 "ready" BIOS and do we have a native interface ->
322 * yes, use a native interface
323 * 3) Else use the acpi-video interface
324 *
325 * Arguably the native on win8 check should be done first, but that would
326 * be a behavior change, which may causes issues.
327 */
328enum acpi_backlight_type acpi_video_get_backlight_type(void)
329{
330 static DEFINE_MUTEX(init_mutex);
331 static bool init_done;
332 static long video_caps;
333
334 /* Parse cmdline, dmi and acpi only once */
335 mutex_lock(&init_mutex);
336 if (!init_done) {
337 acpi_video_parse_cmdline();
338 dmi_check_system(video_detect_dmi_table);
339 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
340 ACPI_UINT32_MAX, find_video, NULL,
341 &video_caps, NULL);
342 INIT_WORK(&backlight_notify_work,
343 acpi_video_backlight_notify_work);
344 backlight_nb.notifier_call = acpi_video_backlight_notify;
345 backlight_nb.priority = 0;
346 if (backlight_register_notifier(&backlight_nb) == 0)
347 backlight_notifier_registered = true;
348 init_done = true;
349 }
350 mutex_unlock(&init_mutex);
351
352 if (acpi_backlight_cmdline != acpi_backlight_undef)
353 return acpi_backlight_cmdline;
354
355 if (acpi_backlight_dmi != acpi_backlight_undef)
356 return acpi_backlight_dmi;
357
358 if (!(video_caps & ACPI_VIDEO_BACKLIGHT))
359 return acpi_backlight_vendor;
360
361 if (acpi_osi_is_win8() && backlight_device_registered(BACKLIGHT_RAW))
362 return acpi_backlight_native;
363
364 return acpi_backlight_video;
365}
366EXPORT_SYMBOL(acpi_video_get_backlight_type);
367
368/*
369 * Set the preferred backlight interface type based on DMI info.
370 * This function allows DMI blacklists to be implemented by external
371 * platform drivers instead of putting a big blacklist in video_detect.c
372 */
373void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
374{
375 acpi_backlight_dmi = type;
376 /* Remove acpi-video backlight interface if it is no longer desired */
377 if (acpi_video_get_backlight_type() != acpi_backlight_video)
378 acpi_video_unregister_backlight();
379}
380EXPORT_SYMBOL(acpi_video_set_dmi_backlight_type);
381
382void __exit acpi_video_detect_exit(void)
383{
384 if (backlight_notifier_registered)
385 backlight_unregister_notifier(&backlight_nb);
386}
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_force_none(const struct dmi_system_id *d)
134{
135 acpi_backlight_dmi = acpi_backlight_none;
136 return 0;
137}
138
139static const struct dmi_system_id video_detect_dmi_table[] = {
140 /*
141 * Models which should use the vendor backlight interface,
142 * because of broken ACPI video backlight control.
143 */
144 {
145 /* https://bugzilla.redhat.com/show_bug.cgi?id=1128309 */
146 .callback = video_detect_force_vendor,
147 /* Acer KAV80 */
148 .matches = {
149 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
150 DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"),
151 },
152 },
153 {
154 .callback = video_detect_force_vendor,
155 /* Asus UL30VT */
156 .matches = {
157 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
158 DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"),
159 },
160 },
161 {
162 .callback = video_detect_force_vendor,
163 /* Asus UL30A */
164 .matches = {
165 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
166 DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"),
167 },
168 },
169 {
170 .callback = video_detect_force_vendor,
171 /* Asus X55U */
172 .matches = {
173 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
174 DMI_MATCH(DMI_PRODUCT_NAME, "X55U"),
175 },
176 },
177 {
178 /* https://bugs.launchpad.net/bugs/1000146 */
179 .callback = video_detect_force_vendor,
180 /* Asus X101CH */
181 .matches = {
182 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
183 DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"),
184 },
185 },
186 {
187 .callback = video_detect_force_vendor,
188 /* Asus X401U */
189 .matches = {
190 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
191 DMI_MATCH(DMI_PRODUCT_NAME, "X401U"),
192 },
193 },
194 {
195 .callback = video_detect_force_vendor,
196 /* Asus X501U */
197 .matches = {
198 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
199 DMI_MATCH(DMI_PRODUCT_NAME, "X501U"),
200 },
201 },
202 {
203 /* https://bugs.launchpad.net/bugs/1000146 */
204 .callback = video_detect_force_vendor,
205 /* Asus 1015CX */
206 .matches = {
207 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
208 DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"),
209 },
210 },
211 {
212 .callback = video_detect_force_vendor,
213 /* Samsung N150/N210/N220 */
214 .matches = {
215 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
216 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
217 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
218 },
219 },
220 {
221 .callback = video_detect_force_vendor,
222 /* Samsung NF110/NF210/NF310 */
223 .matches = {
224 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
225 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
226 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
227 },
228 },
229 {
230 .callback = video_detect_force_vendor,
231 /* Samsung NC210 */
232 .matches = {
233 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
234 DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"),
235 DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"),
236 },
237 },
238 {
239 .callback = video_detect_force_vendor,
240 /* Xiaomi Mi Pad 2 */
241 .matches = {
242 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
243 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
244 },
245 },
246
247 /*
248 * Models which should use the vendor backlight interface,
249 * because of broken native backlight control.
250 */
251 {
252 .callback = video_detect_force_vendor,
253 /* Sony Vaio PCG-FRV35 */
254 .matches = {
255 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
256 DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"),
257 },
258 },
259
260 /*
261 * Toshiba models with Transflective display, these need to use
262 * the toshiba_acpi vendor driver for proper Transflective handling.
263 */
264 {
265 .callback = video_detect_force_vendor,
266 .matches = {
267 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
268 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R500"),
269 },
270 },
271 {
272 .callback = video_detect_force_vendor,
273 .matches = {
274 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
275 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R600"),
276 },
277 },
278
279 /*
280 * These models have a working acpi_video backlight control, and using
281 * native backlight causes a regression where backlight does not work
282 * when userspace is not handling brightness key events. Disable
283 * native_backlight on these to fix this:
284 * https://bugzilla.kernel.org/show_bug.cgi?id=81691
285 */
286 {
287 .callback = video_detect_force_video,
288 /* ThinkPad T420 */
289 .matches = {
290 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
291 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
292 },
293 },
294 {
295 .callback = video_detect_force_video,
296 /* ThinkPad T520 */
297 .matches = {
298 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
299 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"),
300 },
301 },
302 {
303 .callback = video_detect_force_video,
304 /* ThinkPad X201s */
305 .matches = {
306 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
307 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
308 },
309 },
310 {
311 .callback = video_detect_force_video,
312 /* ThinkPad X201T */
313 .matches = {
314 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
315 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"),
316 },
317 },
318
319 /* The native backlight controls do not work on some older machines */
320 {
321 /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */
322 .callback = video_detect_force_video,
323 /* HP ENVY 15 Notebook */
324 .matches = {
325 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
326 DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"),
327 },
328 },
329 {
330 .callback = video_detect_force_video,
331 /* SAMSUNG 870Z5E/880Z5E/680Z5E */
332 .matches = {
333 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
334 DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"),
335 },
336 },
337 {
338 .callback = video_detect_force_video,
339 /* SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V */
340 .matches = {
341 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
342 DMI_MATCH(DMI_PRODUCT_NAME,
343 "370R4E/370R4V/370R5E/3570RE/370R5V"),
344 },
345 },
346 {
347 /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
348 .callback = video_detect_force_video,
349 /* SAMSUNG 3570R/370R/470R/450R/510R/4450RV */
350 .matches = {
351 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
352 DMI_MATCH(DMI_PRODUCT_NAME,
353 "3570R/370R/470R/450R/510R/4450RV"),
354 },
355 },
356 {
357 /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */
358 .callback = video_detect_force_video,
359 /* SAMSUNG 670Z5E */
360 .matches = {
361 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
362 DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"),
363 },
364 },
365 {
366 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
367 .callback = video_detect_force_video,
368 /* SAMSUNG 730U3E/740U3E */
369 .matches = {
370 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
371 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
372 },
373 },
374 {
375 /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
376 .callback = video_detect_force_video,
377 /* SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D */
378 .matches = {
379 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
380 DMI_MATCH(DMI_PRODUCT_NAME,
381 "900X3C/900X3D/900X3E/900X4C/900X4D"),
382 },
383 },
384 {
385 /* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */
386 .callback = video_detect_force_video,
387 /* Dell XPS14 L421X */
388 .matches = {
389 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
390 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"),
391 },
392 },
393 {
394 /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
395 .callback = video_detect_force_video,
396 /* Dell XPS15 L521X */
397 .matches = {
398 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
399 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
400 },
401 },
402 {
403 /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */
404 .callback = video_detect_force_video,
405 /* SAMSUNG 530U4E/540U4E */
406 .matches = {
407 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
408 DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
409 },
410 },
411 {
412 /* https://bugs.launchpad.net/bugs/1894667 */
413 .callback = video_detect_force_video,
414 /* HP 635 Notebook */
415 .matches = {
416 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
417 DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"),
418 },
419 },
420
421 /* Non win8 machines which need native backlight nevertheless */
422 {
423 /* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */
424 .callback = video_detect_force_native,
425 /* Lenovo Ideapad S405 */
426 .matches = {
427 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
428 DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
429 },
430 },
431 {
432 /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
433 .callback = video_detect_force_native,
434 /* Lenovo Ideapad Z570 */
435 .matches = {
436 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
437 DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
438 },
439 },
440 {
441 .callback = video_detect_force_native,
442 /* Lenovo E41-25 */
443 .matches = {
444 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
445 DMI_MATCH(DMI_PRODUCT_NAME, "81FS"),
446 },
447 },
448 {
449 .callback = video_detect_force_native,
450 /* Lenovo E41-45 */
451 .matches = {
452 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
453 DMI_MATCH(DMI_PRODUCT_NAME, "82BK"),
454 },
455 },
456 {
457 /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
458 .callback = video_detect_force_native,
459 /* Apple MacBook Pro 12,1 */
460 .matches = {
461 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
462 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
463 },
464 },
465 {
466 .callback = video_detect_force_native,
467 /* Dell Inspiron N4010 */
468 .matches = {
469 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
470 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N4010"),
471 },
472 },
473 {
474 .callback = video_detect_force_native,
475 /* Dell Vostro V131 */
476 .matches = {
477 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
478 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
479 },
480 },
481 {
482 /* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */
483 .callback = video_detect_force_native,
484 /* Dell XPS 17 L702X */
485 .matches = {
486 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
487 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
488 },
489 },
490 {
491 .callback = video_detect_force_native,
492 /* Dell Precision 7510 */
493 .matches = {
494 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
495 DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
496 },
497 },
498 {
499 .callback = video_detect_force_native,
500 /* Acer Aspire 4810T */
501 .matches = {
502 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
503 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"),
504 },
505 },
506 {
507 .callback = video_detect_force_native,
508 /* Acer Aspire 5738z */
509 .matches = {
510 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
511 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"),
512 DMI_MATCH(DMI_BOARD_NAME, "JV50"),
513 },
514 },
515 {
516 /* https://bugzilla.redhat.com/show_bug.cgi?id=1012674 */
517 .callback = video_detect_force_native,
518 /* Acer Aspire 5741 */
519 .matches = {
520 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
521 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"),
522 },
523 },
524 {
525 /* https://bugzilla.kernel.org/show_bug.cgi?id=42993 */
526 .callback = video_detect_force_native,
527 /* Acer Aspire 5750 */
528 .matches = {
529 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
530 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"),
531 },
532 },
533 {
534 /* https://bugzilla.kernel.org/show_bug.cgi?id=42833 */
535 .callback = video_detect_force_native,
536 /* Acer Extensa 5235 */
537 .matches = {
538 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
539 DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"),
540 },
541 },
542 {
543 .callback = video_detect_force_native,
544 /* Acer TravelMate 4750 */
545 .matches = {
546 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
547 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"),
548 },
549 },
550 {
551 /* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */
552 .callback = video_detect_force_native,
553 /* Acer TravelMate 5735Z */
554 .matches = {
555 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
556 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"),
557 DMI_MATCH(DMI_BOARD_NAME, "BA51_MV"),
558 },
559 },
560 {
561 /* https://bugzilla.kernel.org/show_bug.cgi?id=36322 */
562 .callback = video_detect_force_native,
563 /* Acer TravelMate 5760 */
564 .matches = {
565 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
566 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"),
567 },
568 },
569 {
570 .callback = video_detect_force_native,
571 /* ASUSTeK COMPUTER INC. GA401 */
572 .matches = {
573 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
574 DMI_MATCH(DMI_PRODUCT_NAME, "GA401"),
575 },
576 },
577 {
578 .callback = video_detect_force_native,
579 /* ASUSTeK COMPUTER INC. GA502 */
580 .matches = {
581 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
582 DMI_MATCH(DMI_PRODUCT_NAME, "GA502"),
583 },
584 },
585 {
586 .callback = video_detect_force_native,
587 /* ASUSTeK COMPUTER INC. GA503 */
588 .matches = {
589 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
590 DMI_MATCH(DMI_PRODUCT_NAME, "GA503"),
591 },
592 },
593 {
594 .callback = video_detect_force_native,
595 /* Asus U46E */
596 .matches = {
597 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
598 DMI_MATCH(DMI_PRODUCT_NAME, "U46E"),
599 },
600 },
601 {
602 .callback = video_detect_force_native,
603 /* Asus UX303UB */
604 .matches = {
605 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
606 DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"),
607 },
608 },
609 {
610 .callback = video_detect_force_native,
611 /* HP EliteBook 8460p */
612 .matches = {
613 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
614 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8460p"),
615 },
616 },
617 {
618 .callback = video_detect_force_native,
619 /* HP Pavilion g6-1d80nr / B4U19UA */
620 .matches = {
621 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
622 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"),
623 DMI_MATCH(DMI_PRODUCT_SKU, "B4U19UA"),
624 },
625 },
626 {
627 .callback = video_detect_force_native,
628 /* Samsung N150P */
629 .matches = {
630 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
631 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
632 DMI_MATCH(DMI_BOARD_NAME, "N150P"),
633 },
634 },
635 {
636 .callback = video_detect_force_native,
637 /* Samsung N145P/N250P/N260P */
638 .matches = {
639 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
640 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
641 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
642 },
643 },
644 {
645 .callback = video_detect_force_native,
646 /* Samsung N250P */
647 .matches = {
648 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
649 DMI_MATCH(DMI_PRODUCT_NAME, "N250P"),
650 DMI_MATCH(DMI_BOARD_NAME, "N250P"),
651 },
652 },
653 {
654 /* https://bugzilla.kernel.org/show_bug.cgi?id=202401 */
655 .callback = video_detect_force_native,
656 /* Sony Vaio VPCEH3U1E */
657 .matches = {
658 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
659 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"),
660 },
661 },
662 {
663 .callback = video_detect_force_native,
664 /* Sony Vaio VPCY11S1E */
665 .matches = {
666 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
667 DMI_MATCH(DMI_PRODUCT_NAME, "VPCY11S1E"),
668 },
669 },
670
671 /*
672 * These Toshibas have a broken acpi-video interface for brightness
673 * control. They also have an issue where the panel is off after
674 * suspend until a special firmware call is made to turn it back
675 * on. This is handled by the toshiba_acpi kernel module, so that
676 * module must be enabled for these models to work correctly.
677 */
678 {
679 /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */
680 .callback = video_detect_force_native,
681 /* Toshiba Portégé R700 */
682 .matches = {
683 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
684 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"),
685 },
686 },
687 {
688 /* Portégé: https://bugs.freedesktop.org/show_bug.cgi?id=82634 */
689 /* Satellite: https://bugzilla.kernel.org/show_bug.cgi?id=21012 */
690 .callback = video_detect_force_native,
691 /* Toshiba Satellite/Portégé R830 */
692 .matches = {
693 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
694 DMI_MATCH(DMI_PRODUCT_NAME, "R830"),
695 },
696 },
697 {
698 .callback = video_detect_force_native,
699 /* Toshiba Satellite/Portégé Z830 */
700 .matches = {
701 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
702 DMI_MATCH(DMI_PRODUCT_NAME, "Z830"),
703 },
704 },
705
706 /*
707 * Models which have nvidia-ec-wmi support, but should not use it.
708 * Note this indicates a likely firmware bug on these models and should
709 * be revisited if/when Linux gets support for dynamic mux mode.
710 */
711 {
712 .callback = video_detect_force_native,
713 /* Dell G15 5515 */
714 .matches = {
715 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
716 DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5515"),
717 },
718 },
719
720 /*
721 * Desktops which falsely report a backlight and which our heuristics
722 * for this do not catch.
723 */
724 {
725 .callback = video_detect_force_none,
726 /* Dell OptiPlex 9020M */
727 .matches = {
728 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
729 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"),
730 },
731 },
732 {
733 .callback = video_detect_force_none,
734 /* GIGABYTE GB-BXBT-2807 */
735 .matches = {
736 DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"),
737 DMI_MATCH(DMI_PRODUCT_NAME, "GB-BXBT-2807"),
738 },
739 },
740 {
741 .callback = video_detect_force_none,
742 /* MSI MS-7721 */
743 .matches = {
744 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
745 DMI_MATCH(DMI_PRODUCT_NAME, "MS-7721"),
746 },
747 },
748 { },
749};
750
751static bool google_cros_ec_present(void)
752{
753 return acpi_dev_found("GOOG0004") || acpi_dev_found("GOOG000C");
754}
755
756/*
757 * Windows 8 and newer no longer use the ACPI video interface, so it often
758 * does not work. So on win8+ systems prefer native brightness control.
759 * Chromebooks should always prefer native backlight control.
760 */
761static bool prefer_native_over_acpi_video(void)
762{
763 return acpi_osi_is_win8() || google_cros_ec_present();
764}
765
766/*
767 * Determine which type of backlight interface to use on this system,
768 * First check cmdline, then dmi quirks, then do autodetect.
769 */
770static enum acpi_backlight_type __acpi_video_get_backlight_type(bool native)
771{
772 static DEFINE_MUTEX(init_mutex);
773 static bool nvidia_wmi_ec_present;
774 static bool apple_gmux_present;
775 static bool native_available;
776 static bool init_done;
777 static long video_caps;
778
779 /* Parse cmdline, dmi and acpi only once */
780 mutex_lock(&init_mutex);
781 if (!init_done) {
782 acpi_video_parse_cmdline();
783 dmi_check_system(video_detect_dmi_table);
784 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
785 ACPI_UINT32_MAX, find_video, NULL,
786 &video_caps, NULL);
787 nvidia_wmi_ec_present = nvidia_wmi_ec_supported();
788 apple_gmux_present = apple_gmux_detect(NULL, NULL);
789 init_done = true;
790 }
791 if (native)
792 native_available = true;
793 mutex_unlock(&init_mutex);
794
795 /*
796 * The below heuristics / detection steps are in order of descending
797 * presedence. The commandline takes presedence over anything else.
798 */
799 if (acpi_backlight_cmdline != acpi_backlight_undef)
800 return acpi_backlight_cmdline;
801
802 /* DMI quirks override any autodetection. */
803 if (acpi_backlight_dmi != acpi_backlight_undef)
804 return acpi_backlight_dmi;
805
806 /* Special cases such as nvidia_wmi_ec and apple gmux. */
807 if (nvidia_wmi_ec_present)
808 return acpi_backlight_nvidia_wmi_ec;
809
810 if (apple_gmux_present)
811 return acpi_backlight_apple_gmux;
812
813 /* Use ACPI video if available, except when native should be preferred. */
814 if ((video_caps & ACPI_VIDEO_BACKLIGHT) &&
815 !(native_available && prefer_native_over_acpi_video()))
816 return acpi_backlight_video;
817
818 /* Use native if available */
819 if (native_available)
820 return acpi_backlight_native;
821
822 /* No ACPI video/native (old hw), use vendor specific fw methods. */
823 return acpi_backlight_vendor;
824}
825
826enum acpi_backlight_type acpi_video_get_backlight_type(void)
827{
828 return __acpi_video_get_backlight_type(false);
829}
830EXPORT_SYMBOL(acpi_video_get_backlight_type);
831
832bool acpi_video_backlight_use_native(void)
833{
834 return __acpi_video_get_backlight_type(true) == acpi_backlight_native;
835}
836EXPORT_SYMBOL(acpi_video_backlight_use_native);