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Commit | Line | Data |
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1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/list.h> | |
bbac81f5 | 32 | #include <linux/mutex.h> |
e9dab196 | 33 | #include <linux/input.h> |
2f3d000a | 34 | #include <linux/backlight.h> |
702ed512 | 35 | #include <linux/thermal.h> |
935e5f29 | 36 | #include <linux/sort.h> |
74a365b3 MG |
37 | #include <linux/pci.h> |
38 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 | 40 | #include <asm/uaccess.h> |
eb27cae8 | 41 | #include <linux/dmi.h> |
1da177e4 LT |
42 | #include <acpi/acpi_bus.h> |
43 | #include <acpi/acpi_drivers.h> | |
ac7729da | 44 | #include <linux/suspend.h> |
e92a7162 | 45 | #include <acpi/video.h> |
1da177e4 | 46 | |
8c5bd7ad RW |
47 | #include "internal.h" |
48 | ||
a192a958 LB |
49 | #define PREFIX "ACPI: " |
50 | ||
1da177e4 LT |
51 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
52 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
53 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
54 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
55 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
56 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
57 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
58 | ||
f4715189 TT |
59 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
60 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
61 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
62 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
63 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 64 | |
2f3d000a | 65 | #define MAX_NAME_LEN 20 |
1da177e4 | 66 | |
1da177e4 | 67 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 68 | ACPI_MODULE_NAME("video"); |
1da177e4 | 69 | |
f52fd66d | 70 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 71 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
72 | MODULE_LICENSE("GPL"); |
73 | ||
90ab5ee9 | 74 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
75 | module_param(brightness_switch_enabled, bool, 0644); |
76 | ||
c504f8cb ZR |
77 | /* |
78 | * By default, we don't allow duplicate ACPI video bus devices | |
79 | * under the same VGA controller | |
80 | */ | |
90ab5ee9 | 81 | static bool allow_duplicates; |
c504f8cb ZR |
82 | module_param(allow_duplicates, bool, 0644); |
83 | ||
99fd1895 ZR |
84 | /* |
85 | * Some BIOSes claim they use minimum backlight at boot, | |
86 | * and this may bring dimming screen after boot | |
87 | */ | |
90ab5ee9 | 88 | static bool use_bios_initial_backlight = 1; |
99fd1895 ZR |
89 | module_param(use_bios_initial_backlight, bool, 0644); |
90 | ||
86e437f0 | 91 | static int register_count = 0; |
4be44fcd | 92 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 93 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 94 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 95 | |
1ba90e3a TR |
96 | static const struct acpi_device_id video_device_ids[] = { |
97 | {ACPI_VIDEO_HID, 0}, | |
98 | {"", 0}, | |
99 | }; | |
100 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
101 | ||
1da177e4 | 102 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 103 | .name = "video", |
1da177e4 | 104 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 105 | .ids = video_device_ids, |
1da177e4 LT |
106 | .ops = { |
107 | .add = acpi_video_bus_add, | |
108 | .remove = acpi_video_bus_remove, | |
7015558f | 109 | .notify = acpi_video_bus_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | struct acpi_video_bus_flags { | |
4be44fcd LB |
114 | u8 multihead:1; /* can switch video heads */ |
115 | u8 rom:1; /* can retrieve a video rom */ | |
116 | u8 post:1; /* can configure the head to */ | |
117 | u8 reserved:5; | |
1da177e4 LT |
118 | }; |
119 | ||
120 | struct acpi_video_bus_cap { | |
21fcb34e FC |
121 | u8 _DOS:1; /* Enable/Disable output switching */ |
122 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
123 | u8 _ROM:1; /* Get ROM Data */ | |
124 | u8 _GPD:1; /* Get POST Device */ | |
125 | u8 _SPD:1; /* Set POST Device */ | |
126 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 127 | u8 reserved:2; |
1da177e4 LT |
128 | }; |
129 | ||
4be44fcd LB |
130 | struct acpi_video_device_attrib { |
131 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
132 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
133 | u32 display_type:4; /* Describe the specific type in use */ | |
134 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
135 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
136 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 137 | the VGA device. */ |
21fcb34e FC |
138 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
139 | u32 reserved:10; /* Must be 0 */ | |
140 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_video_enumerated_device { | |
144 | union { | |
145 | u32 int_val; | |
4be44fcd | 146 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
147 | } value; |
148 | struct acpi_video_device *bind_info; | |
149 | }; | |
150 | ||
151 | struct acpi_video_bus { | |
e6afa0de | 152 | struct acpi_device *device; |
4be44fcd | 153 | u8 dos_setting; |
1da177e4 | 154 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
155 | u8 attached_count; |
156 | struct acpi_video_bus_cap cap; | |
1da177e4 | 157 | struct acpi_video_bus_flags flags; |
4be44fcd | 158 | struct list_head video_device_list; |
bbac81f5 | 159 | struct mutex device_list_lock; /* protects video_device_list */ |
e9dab196 LY |
160 | struct input_dev *input; |
161 | char phys[32]; /* for input device */ | |
ac7729da | 162 | struct notifier_block pm_nb; |
1da177e4 LT |
163 | }; |
164 | ||
165 | struct acpi_video_device_flags { | |
4be44fcd LB |
166 | u8 crt:1; |
167 | u8 lcd:1; | |
168 | u8 tvout:1; | |
82cae999 | 169 | u8 dvi:1; |
4be44fcd LB |
170 | u8 bios:1; |
171 | u8 unknown:1; | |
91e13aa3 AL |
172 | u8 notify:1; |
173 | u8 reserved:1; | |
1da177e4 LT |
174 | }; |
175 | ||
176 | struct acpi_video_device_cap { | |
21fcb34e FC |
177 | u8 _ADR:1; /* Return the unique ID */ |
178 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
179 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 180 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 181 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 182 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
183 | }; |
184 | ||
d32f6947 ZR |
185 | struct acpi_video_brightness_flags { |
186 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 187 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a ZR |
188 | u8 _BCL_use_index:1; /* levels in _BCL are index values */ |
189 | u8 _BCM_use_index:1; /* input of _BCM is an index value */ | |
190 | u8 _BQC_use_index:1; /* _BQC returns an index value */ | |
d32f6947 ZR |
191 | }; |
192 | ||
1da177e4 | 193 | struct acpi_video_device_brightness { |
4be44fcd LB |
194 | int curr; |
195 | int count; | |
196 | int *levels; | |
d32f6947 | 197 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
198 | }; |
199 | ||
200 | struct acpi_video_device { | |
4be44fcd LB |
201 | unsigned long device_id; |
202 | struct acpi_video_device_flags flags; | |
203 | struct acpi_video_device_cap cap; | |
204 | struct list_head entry; | |
205 | struct acpi_video_bus *video; | |
206 | struct acpi_device *dev; | |
1da177e4 | 207 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 208 | struct backlight_device *backlight; |
4a703a8f | 209 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
210 | }; |
211 | ||
b7171ae7 | 212 | static const char device_decode[][30] = { |
1da177e4 LT |
213 | "motherboard VGA device", |
214 | "PCI VGA device", | |
215 | "AGP VGA device", | |
216 | "UNKNOWN", | |
217 | }; | |
218 | ||
4be44fcd LB |
219 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
220 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
221 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
222 | struct acpi_video_device *device); | |
1da177e4 | 223 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
224 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
225 | int level); | |
226 | static int acpi_video_device_lcd_get_level_current( | |
227 | struct acpi_video_device *device, | |
a89803df | 228 | unsigned long long *level, bool raw); |
4be44fcd LB |
229 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
230 | u32 level_current, u32 event); | |
c8890f90 | 231 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 232 | int event); |
1da177e4 | 233 | |
21fcb34e | 234 | /* backlight device sysfs support */ |
2f3d000a YL |
235 | static int acpi_video_get_brightness(struct backlight_device *bd) |
236 | { | |
27663c58 | 237 | unsigned long long cur_level; |
38531e6f | 238 | int i; |
2f3d000a | 239 | struct acpi_video_device *vd = |
655bfd7a | 240 | (struct acpi_video_device *)bl_get_data(bd); |
c8890f90 | 241 | |
a89803df | 242 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 243 | return -EINVAL; |
38531e6f MG |
244 | for (i = 2; i < vd->brightness->count; i++) { |
245 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
246 | /* |
247 | * The first two entries are special - see page 575 | |
248 | * of the ACPI spec 3.0 | |
249 | */ | |
38531e6f MG |
250 | return i-2; |
251 | } | |
252 | return 0; | |
2f3d000a YL |
253 | } |
254 | ||
255 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
256 | { | |
24450c7a | 257 | int request_level = bd->props.brightness + 2; |
2f3d000a | 258 | struct acpi_video_device *vd = |
655bfd7a | 259 | (struct acpi_video_device *)bl_get_data(bd); |
24450c7a ZR |
260 | |
261 | return acpi_video_device_lcd_set_level(vd, | |
262 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
263 | } |
264 | ||
acc2472e | 265 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
266 | .get_brightness = acpi_video_get_brightness, |
267 | .update_status = acpi_video_set_brightness, | |
268 | }; | |
269 | ||
702ed512 | 270 | /* thermal cooling device callbacks */ |
4a703a8f | 271 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 272 | long *state) |
702ed512 | 273 | { |
4a703a8f | 274 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
275 | struct acpi_video_device *video = acpi_driver_data(device); |
276 | ||
6503e5df MG |
277 | *state = video->brightness->count - 3; |
278 | return 0; | |
702ed512 ZR |
279 | } |
280 | ||
4a703a8f | 281 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 282 | long *state) |
702ed512 | 283 | { |
4a703a8f | 284 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 285 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 286 | unsigned long long level; |
6503e5df | 287 | int offset; |
702ed512 | 288 | |
a89803df | 289 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 290 | return -EINVAL; |
6503e5df MG |
291 | for (offset = 2; offset < video->brightness->count; offset++) |
292 | if (level == video->brightness->levels[offset]) { | |
293 | *state = video->brightness->count - offset - 1; | |
294 | return 0; | |
295 | } | |
702ed512 ZR |
296 | |
297 | return -EINVAL; | |
298 | } | |
299 | ||
300 | static int | |
4a703a8f | 301 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 302 | { |
4a703a8f | 303 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
304 | struct acpi_video_device *video = acpi_driver_data(device); |
305 | int level; | |
306 | ||
307 | if ( state >= video->brightness->count - 2) | |
308 | return -EINVAL; | |
309 | ||
310 | state = video->brightness->count - state; | |
311 | level = video->brightness->levels[state -1]; | |
312 | return acpi_video_device_lcd_set_level(video, level); | |
313 | } | |
314 | ||
9c8b04be | 315 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
316 | .get_max_state = video_get_max_state, |
317 | .get_cur_state = video_get_cur_state, | |
318 | .set_cur_state = video_set_cur_state, | |
319 | }; | |
320 | ||
21fcb34e FC |
321 | /* |
322 | * -------------------------------------------------------------------------- | |
323 | * Video Management | |
324 | * -------------------------------------------------------------------------- | |
325 | */ | |
1da177e4 | 326 | |
1da177e4 | 327 | static int |
4be44fcd LB |
328 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
329 | union acpi_object **levels) | |
1da177e4 | 330 | { |
4be44fcd LB |
331 | int status; |
332 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
333 | union acpi_object *obj; | |
1da177e4 | 334 | |
1da177e4 LT |
335 | |
336 | *levels = NULL; | |
337 | ||
90130268 | 338 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 339 | if (!ACPI_SUCCESS(status)) |
d550d98d | 340 | return status; |
4be44fcd | 341 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 342 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 343 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
344 | status = -EFAULT; |
345 | goto err; | |
346 | } | |
347 | ||
348 | *levels = obj; | |
349 | ||
d550d98d | 350 | return 0; |
1da177e4 | 351 | |
4be44fcd | 352 | err: |
6044ec88 | 353 | kfree(buffer.pointer); |
1da177e4 | 354 | |
d550d98d | 355 | return status; |
1da177e4 LT |
356 | } |
357 | ||
358 | static int | |
4be44fcd | 359 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 360 | { |
24450c7a | 361 | int status; |
4be44fcd LB |
362 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
363 | struct acpi_object_list args = { 1, &arg0 }; | |
9e6dada9 | 364 | int state; |
1da177e4 | 365 | |
1da177e4 | 366 | arg0.integer.value = level; |
1da177e4 | 367 | |
24450c7a ZR |
368 | status = acpi_evaluate_object(device->dev->handle, "_BCM", |
369 | &args, NULL); | |
370 | if (ACPI_FAILURE(status)) { | |
371 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
372 | return -EIO; | |
373 | } | |
374 | ||
4500ca8e | 375 | device->brightness->curr = level; |
9e6dada9 | 376 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 377 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
378 | if (device->backlight) |
379 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
380 | return 0; |
381 | } | |
9e6dada9 | 382 | |
24450c7a ZR |
383 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
384 | return -EINVAL; | |
1da177e4 LT |
385 | } |
386 | ||
45cb50e6 ZR |
387 | /* |
388 | * For some buggy _BQC methods, we need to add a constant value to | |
389 | * the _BQC return value to get the actual current brightness level | |
390 | */ | |
391 | ||
392 | static int bqc_offset_aml_bug_workaround; | |
393 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
394 | { | |
395 | bqc_offset_aml_bug_workaround = 9; | |
396 | return 0; | |
397 | } | |
398 | ||
129ff8f8 ZR |
399 | static int video_ignore_initial_backlight(const struct dmi_system_id *d) |
400 | { | |
401 | use_bios_initial_backlight = 0; | |
402 | return 0; | |
403 | } | |
404 | ||
45cb50e6 ZR |
405 | static struct dmi_system_id video_dmi_table[] __initdata = { |
406 | /* | |
407 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
408 | */ | |
409 | { | |
410 | .callback = video_set_bqc_offset, | |
411 | .ident = "Acer Aspire 5720", | |
412 | .matches = { | |
413 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
414 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
415 | }, | |
416 | }, | |
5afc4abe LB |
417 | { |
418 | .callback = video_set_bqc_offset, | |
419 | .ident = "Acer Aspire 5710Z", | |
420 | .matches = { | |
421 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
422 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
423 | }, | |
424 | }, | |
34ac272b ZR |
425 | { |
426 | .callback = video_set_bqc_offset, | |
427 | .ident = "eMachines E510", | |
428 | .matches = { | |
429 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
430 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
431 | }, | |
432 | }, | |
93bcece2 ZR |
433 | { |
434 | .callback = video_set_bqc_offset, | |
435 | .ident = "Acer Aspire 5315", | |
436 | .matches = { | |
437 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
438 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
439 | }, | |
440 | }, | |
152a4e63 ZR |
441 | { |
442 | .callback = video_set_bqc_offset, | |
443 | .ident = "Acer Aspire 7720", | |
444 | .matches = { | |
445 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
446 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
447 | }, | |
448 | }, | |
129ff8f8 ZR |
449 | { |
450 | .callback = video_ignore_initial_backlight, | |
451 | .ident = "HP Folio 13-2000", | |
452 | .matches = { | |
453 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
454 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), | |
455 | }, | |
456 | }, | |
9657a565 LT |
457 | { |
458 | .callback = video_ignore_initial_backlight, | |
459 | .ident = "Fujitsu E753", | |
460 | .matches = { | |
461 | DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"), | |
462 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"), | |
463 | }, | |
464 | }, | |
771d09b3 GMDV |
465 | { |
466 | .callback = video_ignore_initial_backlight, | |
467 | .ident = "HP Pavilion dm4", | |
468 | .matches = { | |
469 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
470 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), | |
471 | }, | |
472 | }, | |
780a6ec6 AW |
473 | { |
474 | .callback = video_ignore_initial_backlight, | |
475 | .ident = "HP Pavilion g6 Notebook PC", | |
476 | .matches = { | |
477 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
478 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), | |
479 | }, | |
480 | }, | |
4ef366c5 AH |
481 | { |
482 | .callback = video_ignore_initial_backlight, | |
483 | .ident = "HP 1000 Notebook PC", | |
484 | .matches = { | |
485 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
486 | DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), | |
487 | }, | |
488 | }, | |
fedbe9bc AH |
489 | { |
490 | .callback = video_ignore_initial_backlight, | |
491 | .ident = "HP Pavilion m4", | |
492 | .matches = { | |
493 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
494 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), | |
495 | }, | |
496 | }, | |
45cb50e6 ZR |
497 | {} |
498 | }; | |
499 | ||
994fa63c DB |
500 | static unsigned long long |
501 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
502 | unsigned long long bqc_value) | |
503 | { | |
504 | unsigned long long level; | |
505 | ||
506 | if (device->brightness->flags._BQC_use_index) { | |
507 | /* | |
508 | * _BQC returns an index that doesn't account for | |
509 | * the first 2 items with special meaning, so we need | |
510 | * to compensate for that by offsetting ourselves | |
511 | */ | |
512 | if (device->brightness->flags._BCL_reversed) | |
513 | bqc_value = device->brightness->count - 3 - bqc_value; | |
514 | ||
515 | level = device->brightness->levels[bqc_value + 2]; | |
516 | } else { | |
517 | level = bqc_value; | |
518 | } | |
519 | ||
520 | level += bqc_offset_aml_bug_workaround; | |
521 | ||
522 | return level; | |
523 | } | |
524 | ||
1da177e4 | 525 | static int |
4be44fcd | 526 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 527 | unsigned long long *level, bool raw) |
1da177e4 | 528 | { |
c8890f90 | 529 | acpi_status status = AE_OK; |
4e231fa4 | 530 | int i; |
c8890f90 | 531 | |
c60d638e ZR |
532 | if (device->cap._BQC || device->cap._BCQ) { |
533 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
534 | ||
535 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
536 | NULL, level); |
537 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
538 | if (raw) { |
539 | /* | |
540 | * Caller has indicated he wants the raw | |
541 | * value returned by _BQC, so don't furtherly | |
542 | * mess with the value. | |
543 | */ | |
544 | return 0; | |
545 | } | |
546 | ||
994fa63c | 547 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 548 | |
4e231fa4 VS |
549 | for (i = 2; i < device->brightness->count; i++) |
550 | if (device->brightness->levels[i] == *level) { | |
551 | device->brightness->curr = *level; | |
552 | return 0; | |
553 | } | |
a89803df DB |
554 | /* |
555 | * BQC returned an invalid level. | |
556 | * Stop using it. | |
557 | */ | |
558 | ACPI_WARNING((AE_INFO, | |
559 | "%s returned an invalid level", | |
560 | buf)); | |
561 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 562 | } else { |
21fcb34e FC |
563 | /* |
564 | * Fixme: | |
c8890f90 ZR |
565 | * should we return an error or ignore this failure? |
566 | * dev->brightness->curr is a cached value which stores | |
567 | * the correct current backlight level in most cases. | |
568 | * ACPI video backlight still works w/ buggy _BQC. | |
569 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
570 | */ | |
c60d638e ZR |
571 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
572 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
573 | } |
574 | } | |
575 | ||
4500ca8e | 576 | *level = device->brightness->curr; |
c8890f90 | 577 | return 0; |
1da177e4 LT |
578 | } |
579 | ||
580 | static int | |
4be44fcd LB |
581 | acpi_video_device_EDID(struct acpi_video_device *device, |
582 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 583 | { |
4be44fcd LB |
584 | int status; |
585 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
586 | union acpi_object *obj; | |
587 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
588 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 589 | |
1da177e4 LT |
590 | |
591 | *edid = NULL; | |
592 | ||
593 | if (!device) | |
d550d98d | 594 | return -ENODEV; |
1da177e4 LT |
595 | if (length == 128) |
596 | arg0.integer.value = 1; | |
597 | else if (length == 256) | |
598 | arg0.integer.value = 2; | |
599 | else | |
d550d98d | 600 | return -EINVAL; |
1da177e4 | 601 | |
90130268 | 602 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 603 | if (ACPI_FAILURE(status)) |
d550d98d | 604 | return -ENODEV; |
1da177e4 | 605 | |
50dd0969 | 606 | obj = buffer.pointer; |
1da177e4 LT |
607 | |
608 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
609 | *edid = obj; | |
610 | else { | |
6468463a | 611 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
612 | status = -EFAULT; |
613 | kfree(obj); | |
614 | } | |
615 | ||
d550d98d | 616 | return status; |
1da177e4 LT |
617 | } |
618 | ||
1da177e4 LT |
619 | /* bus */ |
620 | ||
1da177e4 LT |
621 | /* |
622 | * Arg: | |
21fcb34e FC |
623 | * video : video bus device pointer |
624 | * bios_flag : | |
1da177e4 LT |
625 | * 0. The system BIOS should NOT automatically switch(toggle) |
626 | * the active display output. | |
627 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 628 | * active display output. No switch event. |
1da177e4 LT |
629 | * 2. The _DGS value should be locked. |
630 | * 3. The system BIOS should not automatically switch (toggle) the | |
631 | * active display output, but instead generate the display switch | |
632 | * event notify code. | |
633 | * lcd_flag : | |
634 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 635 | * of the LCD when the power changes from AC to DC |
21fcb34e | 636 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 637 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 638 | * Return Value: |
ea9f8856 | 639 | * -EINVAL wrong arg. |
1da177e4 LT |
640 | */ |
641 | ||
642 | static int | |
4be44fcd | 643 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 644 | { |
ea9f8856 | 645 | acpi_status status; |
4be44fcd LB |
646 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
647 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 648 | |
b0373843 ZR |
649 | if (!video->cap._DOS) |
650 | return 0; | |
1da177e4 | 651 | |
ea9f8856 IM |
652 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
653 | return -EINVAL; | |
1da177e4 LT |
654 | arg0.integer.value = (lcd_flag << 2) | bios_flag; |
655 | video->dos_setting = arg0.integer.value; | |
ea9f8856 IM |
656 | status = acpi_evaluate_object(video->device->handle, "_DOS", |
657 | &args, NULL); | |
658 | if (ACPI_FAILURE(status)) | |
659 | return -EIO; | |
1da177e4 | 660 | |
ea9f8856 | 661 | return 0; |
1da177e4 LT |
662 | } |
663 | ||
935e5f29 ZR |
664 | /* |
665 | * Simple comparison function used to sort backlight levels. | |
666 | */ | |
667 | ||
668 | static int | |
669 | acpi_video_cmp_level(const void *a, const void *b) | |
670 | { | |
671 | return *(int *)a - *(int *)b; | |
672 | } | |
673 | ||
a50188da AL |
674 | /* |
675 | * Decides if _BQC/_BCQ for this system is usable | |
676 | * | |
677 | * We do this by changing the level first and then read out the current | |
678 | * brightness level, if the value does not match, find out if it is using | |
679 | * index. If not, clear the _BQC/_BCQ capability. | |
680 | */ | |
681 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
682 | int max_level, int current_level) | |
683 | { | |
684 | struct acpi_video_device_brightness *br = device->brightness; | |
685 | int result; | |
686 | unsigned long long level; | |
687 | int test_level; | |
688 | ||
689 | /* don't mess with existing known broken systems */ | |
690 | if (bqc_offset_aml_bug_workaround) | |
691 | return 0; | |
692 | ||
693 | /* | |
694 | * Some systems always report current brightness level as maximum | |
695 | * through _BQC, we need to test another value for them. | |
696 | */ | |
697 | test_level = current_level == max_level ? br->levels[2] : max_level; | |
698 | ||
699 | result = acpi_video_device_lcd_set_level(device, test_level); | |
700 | if (result) | |
701 | return result; | |
702 | ||
703 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
704 | if (result) | |
705 | return result; | |
706 | ||
707 | if (level != test_level) { | |
708 | /* buggy _BQC found, need to find out if it uses index */ | |
709 | if (level < br->count) { | |
710 | if (br->flags._BCL_reversed) | |
711 | level = br->count - 3 - level; | |
712 | if (br->levels[level + 2] == test_level) | |
713 | br->flags._BQC_use_index = 1; | |
714 | } | |
715 | ||
716 | if (!br->flags._BQC_use_index) | |
717 | device->cap._BQC = device->cap._BCQ = 0; | |
718 | } | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | ||
1da177e4 | 724 | /* |
21fcb34e FC |
725 | * Arg: |
726 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
727 | * |
728 | * Return Value: | |
469778c1 JJ |
729 | * Maximum brightness level |
730 | * | |
731 | * Allocate and initialize device->brightness. | |
732 | */ | |
733 | ||
734 | static int | |
735 | acpi_video_init_brightness(struct acpi_video_device *device) | |
736 | { | |
737 | union acpi_object *obj = NULL; | |
d32f6947 | 738 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 739 | unsigned long long level, level_old; |
469778c1 JJ |
740 | union acpi_object *o; |
741 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 742 | int result = -EINVAL; |
469778c1 JJ |
743 | |
744 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
745 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
746 | "LCD brightness level\n")); | |
747 | goto out; | |
748 | } | |
749 | ||
750 | if (obj->package.count < 2) | |
751 | goto out; | |
752 | ||
753 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
754 | if (!br) { | |
755 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 756 | result = -ENOMEM; |
469778c1 JJ |
757 | goto out; |
758 | } | |
759 | ||
d32f6947 | 760 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 761 | GFP_KERNEL); |
1a7c618a ZR |
762 | if (!br->levels) { |
763 | result = -ENOMEM; | |
469778c1 | 764 | goto out_free; |
1a7c618a | 765 | } |
469778c1 JJ |
766 | |
767 | for (i = 0; i < obj->package.count; i++) { | |
768 | o = (union acpi_object *)&obj->package.elements[i]; | |
769 | if (o->type != ACPI_TYPE_INTEGER) { | |
770 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
771 | continue; | |
772 | } | |
773 | br->levels[count] = (u32) o->integer.value; | |
774 | ||
775 | if (br->levels[count] > max_level) | |
776 | max_level = br->levels[count]; | |
777 | count++; | |
778 | } | |
779 | ||
d32f6947 ZR |
780 | /* |
781 | * some buggy BIOS don't export the levels | |
782 | * when machine is on AC/Battery in _BCL package. | |
783 | * In this case, the first two elements in _BCL packages | |
784 | * are also supported brightness levels that OS should take care of. | |
785 | */ | |
90af2cf6 ZR |
786 | for (i = 2; i < count; i++) { |
787 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 788 | level_ac_battery++; |
90af2cf6 ZR |
789 | if (br->levels[i] == br->levels[1]) |
790 | level_ac_battery++; | |
791 | } | |
d32f6947 ZR |
792 | |
793 | if (level_ac_battery < 2) { | |
794 | level_ac_battery = 2 - level_ac_battery; | |
795 | br->flags._BCL_no_ac_battery_levels = 1; | |
796 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
797 | br->levels[i] = br->levels[i - level_ac_battery]; | |
798 | count += level_ac_battery; | |
799 | } else if (level_ac_battery > 2) | |
bf6787eb | 800 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 801 | |
d80fb99f ZR |
802 | /* Check if the _BCL package is in a reversed order */ |
803 | if (max_level == br->levels[2]) { | |
804 | br->flags._BCL_reversed = 1; | |
805 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
806 | acpi_video_cmp_level, NULL); | |
807 | } else if (max_level != br->levels[count - 1]) | |
808 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 809 | "Found unordered _BCL package")); |
469778c1 JJ |
810 | |
811 | br->count = count; | |
812 | device->brightness = br; | |
1a7c618a ZR |
813 | |
814 | /* Check the input/output of _BQC/_BCL/_BCM */ | |
815 | if ((max_level < 100) && (max_level <= (count - 2))) | |
816 | br->flags._BCL_use_index = 1; | |
817 | ||
818 | /* | |
819 | * _BCM is always consistent with _BCL, | |
820 | * at least for all the laptops we have ever seen. | |
821 | */ | |
822 | br->flags._BCM_use_index = br->flags._BCL_use_index; | |
823 | ||
824 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ | |
90c53ca4 | 825 | br->curr = level = max_level; |
e047cca6 ZR |
826 | |
827 | if (!device->cap._BQC) | |
828 | goto set_level; | |
829 | ||
a89803df DB |
830 | result = acpi_video_device_lcd_get_level_current(device, |
831 | &level_old, true); | |
1a7c618a ZR |
832 | if (result) |
833 | goto out_free_levels; | |
834 | ||
a50188da | 835 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
836 | if (result) |
837 | goto out_free_levels; | |
a50188da AL |
838 | /* |
839 | * cap._BQC may get cleared due to _BQC is found to be broken | |
840 | * in acpi_video_bqc_quirk, so check again here. | |
841 | */ | |
842 | if (!device->cap._BQC) | |
843 | goto set_level; | |
e047cca6 | 844 | |
994fa63c DB |
845 | if (use_bios_initial_backlight) { |
846 | level = acpi_video_bqc_value_to_level(device, level_old); | |
90c53ca4 | 847 | /* |
994fa63c DB |
848 | * On some buggy laptops, _BQC returns an uninitialized |
849 | * value when invoked for the first time, i.e. | |
850 | * level_old is invalid (no matter whether it's a level | |
851 | * or an index). Set the backlight to max_level in this case. | |
90c53ca4 | 852 | */ |
994fa63c DB |
853 | for (i = 2; i < br->count; i++) |
854 | if (level_old == br->levels[i]) | |
855 | break; | |
856 | if (i == br->count) | |
857 | level = max_level; | |
90c53ca4 | 858 | } |
e047cca6 | 859 | |
e047cca6 | 860 | set_level: |
90c53ca4 | 861 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
862 | if (result) |
863 | goto out_free_levels; | |
1a7c618a | 864 | |
d32f6947 ZR |
865 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
866 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 867 | kfree(obj); |
1a7c618a | 868 | return result; |
469778c1 JJ |
869 | |
870 | out_free_levels: | |
871 | kfree(br->levels); | |
872 | out_free: | |
873 | kfree(br); | |
874 | out: | |
875 | device->brightness = NULL; | |
876 | kfree(obj); | |
1a7c618a | 877 | return result; |
469778c1 JJ |
878 | } |
879 | ||
880 | /* | |
881 | * Arg: | |
882 | * device : video output device (LCD, CRT, ..) | |
883 | * | |
884 | * Return Value: | |
21fcb34e | 885 | * None |
1da177e4 | 886 | * |
98fb8fe1 | 887 | * Find out all required AML methods defined under the output |
1da177e4 LT |
888 | * device. |
889 | */ | |
890 | ||
4be44fcd | 891 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 892 | { |
1da177e4 | 893 | acpi_handle h_dummy1; |
1da177e4 | 894 | |
90130268 | 895 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { |
1da177e4 LT |
896 | device->cap._ADR = 1; |
897 | } | |
90130268 | 898 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) { |
4be44fcd | 899 | device->cap._BCL = 1; |
1da177e4 | 900 | } |
90130268 | 901 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) { |
4be44fcd | 902 | device->cap._BCM = 1; |
1da177e4 | 903 | } |
2f3d000a YL |
904 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1))) |
905 | device->cap._BQC = 1; | |
c60d638e ZR |
906 | else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ", |
907 | &h_dummy1))) { | |
908 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); | |
909 | device->cap._BCQ = 1; | |
910 | } | |
911 | ||
90130268 | 912 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { |
4be44fcd | 913 | device->cap._DDC = 1; |
1da177e4 | 914 | } |
1da177e4 | 915 | |
c04c697c MG |
916 | if (acpi_video_init_brightness(device)) |
917 | return; | |
918 | ||
8e5c2b77 | 919 | if (acpi_video_backlight_support()) { |
a19a6ee6 | 920 | struct backlight_properties props; |
9661e92c MG |
921 | struct pci_dev *pdev; |
922 | acpi_handle acpi_parent; | |
923 | struct device *parent = NULL; | |
702ed512 | 924 | int result; |
2f3d000a YL |
925 | static int count = 0; |
926 | char *name; | |
1a7c618a | 927 | |
aeb834d9 | 928 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
2f3d000a YL |
929 | if (!name) |
930 | return; | |
aeb834d9 | 931 | count++; |
2f3d000a | 932 | |
9661e92c MG |
933 | acpi_get_parent(device->dev->handle, &acpi_parent); |
934 | ||
935 | pdev = acpi_get_pci_dev(acpi_parent); | |
936 | if (pdev) { | |
937 | parent = &pdev->dev; | |
938 | pci_dev_put(pdev); | |
939 | } | |
940 | ||
a19a6ee6 | 941 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 942 | props.type = BACKLIGHT_FIRMWARE; |
a19a6ee6 | 943 | props.max_brightness = device->brightness->count - 3; |
9661e92c MG |
944 | device->backlight = backlight_device_register(name, |
945 | parent, | |
946 | device, | |
a19a6ee6 MG |
947 | &acpi_backlight_ops, |
948 | &props); | |
2f3d000a | 949 | kfree(name); |
e01ce79b ZR |
950 | if (IS_ERR(device->backlight)) |
951 | return; | |
702ed512 | 952 | |
ac7729da RW |
953 | /* |
954 | * Save current brightness level in case we have to restore it | |
955 | * before acpi_video_device_lcd_set_level() is called next time. | |
956 | */ | |
957 | device->backlight->props.brightness = | |
958 | acpi_video_get_brightness(device->backlight); | |
702ed512 | 959 | |
4a703a8f | 960 | device->cooling_dev = thermal_cooling_device_register("LCD", |
702ed512 | 961 | device->dev, &video_cooling_ops); |
4a703a8f | 962 | if (IS_ERR(device->cooling_dev)) { |
4b4fe3b6 | 963 | /* |
4a703a8f | 964 | * Set cooling_dev to NULL so we don't crash trying to |
4b4fe3b6 DT |
965 | * free it. |
966 | * Also, why the hell we are returning early and | |
967 | * not attempt to register video output if cooling | |
968 | * device registration failed? | |
969 | * -- dtor | |
970 | */ | |
4a703a8f | 971 | device->cooling_dev = NULL; |
43ff39f2 | 972 | return; |
4b4fe3b6 | 973 | } |
43ff39f2 | 974 | |
fc3a8828 | 975 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
4a703a8f | 976 | device->cooling_dev->id); |
9030062f | 977 | result = sysfs_create_link(&device->dev->dev.kobj, |
4a703a8f | 978 | &device->cooling_dev->device.kobj, |
9030062f JL |
979 | "thermal_cooling"); |
980 | if (result) | |
981 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
4a703a8f | 982 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
9030062f JL |
983 | &device->dev->dev.kobj, "device"); |
984 | if (result) | |
985 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
986 | ||
c04c697c MG |
987 | } else { |
988 | /* Remove the brightness object. */ | |
989 | kfree(device->brightness->levels); | |
990 | kfree(device->brightness); | |
991 | device->brightness = NULL; | |
2f3d000a | 992 | } |
1da177e4 LT |
993 | } |
994 | ||
995 | /* | |
21fcb34e FC |
996 | * Arg: |
997 | * device : video output device (VGA) | |
1da177e4 LT |
998 | * |
999 | * Return Value: | |
21fcb34e | 1000 | * None |
1da177e4 | 1001 | * |
98fb8fe1 | 1002 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
1003 | */ |
1004 | ||
4be44fcd | 1005 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1006 | { |
4be44fcd | 1007 | acpi_handle h_dummy1; |
1da177e4 | 1008 | |
90130268 | 1009 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { |
1da177e4 LT |
1010 | video->cap._DOS = 1; |
1011 | } | |
90130268 | 1012 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { |
1da177e4 LT |
1013 | video->cap._DOD = 1; |
1014 | } | |
90130268 | 1015 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { |
1da177e4 LT |
1016 | video->cap._ROM = 1; |
1017 | } | |
90130268 | 1018 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { |
1da177e4 LT |
1019 | video->cap._GPD = 1; |
1020 | } | |
90130268 | 1021 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { |
1da177e4 LT |
1022 | video->cap._SPD = 1; |
1023 | } | |
90130268 | 1024 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) { |
1da177e4 LT |
1025 | video->cap._VPO = 1; |
1026 | } | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Check whether the video bus device has required AML method to | |
1031 | * support the desired features | |
1032 | */ | |
1033 | ||
4be44fcd | 1034 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1035 | { |
4be44fcd | 1036 | acpi_status status = -ENOENT; |
1e4cffe7 | 1037 | struct pci_dev *dev; |
1da177e4 LT |
1038 | |
1039 | if (!video) | |
d550d98d | 1040 | return -EINVAL; |
1da177e4 | 1041 | |
1e4cffe7 | 1042 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1043 | if (!dev) |
1044 | return -ENODEV; | |
1e4cffe7 | 1045 | pci_dev_put(dev); |
22c13f9d | 1046 | |
21fcb34e FC |
1047 | /* |
1048 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1049 | * to check well known required nodes. |
1050 | */ | |
1051 | ||
98fb8fe1 | 1052 | /* Does this device support video switching? */ |
3a1151e3 SB |
1053 | if (video->cap._DOS || video->cap._DOD) { |
1054 | if (!video->cap._DOS) { | |
1055 | printk(KERN_WARNING FW_BUG | |
1056 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1057 | acpi_device_bid(video->device)); | |
1058 | } | |
1da177e4 LT |
1059 | video->flags.multihead = 1; |
1060 | status = 0; | |
1061 | } | |
1062 | ||
98fb8fe1 | 1063 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1064 | if (video->cap._ROM) { |
1da177e4 LT |
1065 | video->flags.rom = 1; |
1066 | status = 0; | |
1067 | } | |
1068 | ||
98fb8fe1 | 1069 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1070 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1071 | video->flags.post = 1; |
1072 | status = 0; | |
1073 | } | |
1074 | ||
d550d98d | 1075 | return status; |
1da177e4 LT |
1076 | } |
1077 | ||
21fcb34e FC |
1078 | /* |
1079 | * -------------------------------------------------------------------------- | |
1080 | * Driver Interface | |
1081 | * -------------------------------------------------------------------------- | |
1082 | */ | |
1da177e4 LT |
1083 | |
1084 | /* device interface */ | |
82cae999 RZ |
1085 | static struct acpi_video_device_attrib* |
1086 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) | |
1087 | { | |
78eed028 DT |
1088 | struct acpi_video_enumerated_device *ids; |
1089 | int i; | |
1090 | ||
1091 | for (i = 0; i < video->attached_count; i++) { | |
1092 | ids = &video->attached_array[i]; | |
1093 | if ((ids->value.int_val & 0xffff) == device_id) | |
1094 | return &ids->value.attrib; | |
1095 | } | |
82cae999 | 1096 | |
82cae999 RZ |
1097 | return NULL; |
1098 | } | |
1da177e4 | 1099 | |
e92a7162 MG |
1100 | static int |
1101 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1102 | unsigned long device_id) | |
1103 | { | |
1104 | struct acpi_video_enumerated_device *ids; | |
1105 | int i; | |
1106 | ||
1107 | for (i = 0; i < video->attached_count; i++) { | |
1108 | ids = &video->attached_array[i]; | |
1109 | if ((ids->value.int_val & 0xffff) == device_id) | |
1110 | return ids->value.int_val; | |
1111 | } | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
1da177e4 | 1116 | static int |
4be44fcd LB |
1117 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1118 | struct acpi_video_bus *video) | |
1da177e4 | 1119 | { |
27663c58 | 1120 | unsigned long long device_id; |
e92a7162 | 1121 | int status, device_type; |
4be44fcd | 1122 | struct acpi_video_device *data; |
82cae999 | 1123 | struct acpi_video_device_attrib* attribute; |
1da177e4 | 1124 | |
4be44fcd LB |
1125 | status = |
1126 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1127 | /* Some device omits _ADR, we skip them instead of fail */ |
1128 | if (ACPI_FAILURE(status)) | |
1129 | return 0; | |
1da177e4 | 1130 | |
91e13aa3 AL |
1131 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1132 | if (!data) | |
1133 | return -ENOMEM; | |
82cae999 | 1134 | |
91e13aa3 AL |
1135 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1136 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1137 | device->driver_data = data; | |
1138 | ||
1139 | data->device_id = device_id; | |
1140 | data->video = video; | |
1141 | data->dev = device; | |
1142 | ||
1143 | attribute = acpi_video_get_device_attr(video, device_id); | |
1144 | ||
1145 | if((attribute != NULL) && attribute->device_id_scheme) { | |
1146 | switch (attribute->display_type) { | |
1147 | case ACPI_VIDEO_DISPLAY_CRT: | |
1148 | data->flags.crt = 1; | |
1149 | break; | |
1150 | case ACPI_VIDEO_DISPLAY_TV: | |
1151 | data->flags.tvout = 1; | |
1152 | break; | |
1153 | case ACPI_VIDEO_DISPLAY_DVI: | |
1154 | data->flags.dvi = 1; | |
1155 | break; | |
1156 | case ACPI_VIDEO_DISPLAY_LCD: | |
1157 | data->flags.lcd = 1; | |
1158 | break; | |
1159 | default: | |
1160 | data->flags.unknown = 1; | |
1161 | break; | |
1162 | } | |
1163 | if(attribute->bios_can_detect) | |
1164 | data->flags.bios = 1; | |
1165 | } else { | |
1166 | /* Check for legacy IDs */ | |
1167 | device_type = acpi_video_get_device_type(video, device_id); | |
1168 | /* Ignore bits 16 and 18-20 */ | |
1169 | switch (device_type & 0xffe2ffff) { | |
e92a7162 MG |
1170 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1171 | data->flags.crt = 1; | |
1172 | break; | |
1173 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1174 | data->flags.lcd = 1; | |
1175 | break; | |
1176 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1177 | data->flags.tvout = 1; | |
1178 | break; | |
1179 | default: | |
1180 | data->flags.unknown = 1; | |
e92a7162 | 1181 | } |
91e13aa3 | 1182 | } |
4be44fcd | 1183 | |
91e13aa3 AL |
1184 | acpi_video_device_bind(video, data); |
1185 | acpi_video_device_find_cap(data); | |
1da177e4 | 1186 | |
91e13aa3 AL |
1187 | status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
1188 | acpi_video_device_notify, data); | |
1189 | if (ACPI_FAILURE(status)) | |
1190 | dev_err(&device->dev, "Error installing notify handler\n"); | |
1191 | else | |
1192 | data->flags.notify = 1; | |
1da177e4 | 1193 | |
91e13aa3 AL |
1194 | mutex_lock(&video->device_list_lock); |
1195 | list_add_tail(&data->entry, &video->video_device_list); | |
1196 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1197 | |
91e13aa3 | 1198 | return status; |
1da177e4 LT |
1199 | } |
1200 | ||
1201 | /* | |
1202 | * Arg: | |
21fcb34e | 1203 | * video : video bus device |
1da177e4 LT |
1204 | * |
1205 | * Return: | |
21fcb34e FC |
1206 | * none |
1207 | * | |
1208 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1209 | * bind the ids with the corresponding video devices |
1210 | * under the video bus. | |
4be44fcd | 1211 | */ |
1da177e4 | 1212 | |
4be44fcd | 1213 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1214 | { |
ff102ea9 DT |
1215 | struct acpi_video_device *dev; |
1216 | ||
bbac81f5 | 1217 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1218 | |
1219 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1220 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1221 | |
bbac81f5 | 1222 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1223 | } |
1224 | ||
1225 | /* | |
1226 | * Arg: | |
21fcb34e FC |
1227 | * video : video bus device |
1228 | * device : video output device under the video | |
1229 | * bus | |
1da177e4 LT |
1230 | * |
1231 | * Return: | |
21fcb34e FC |
1232 | * none |
1233 | * | |
1da177e4 LT |
1234 | * Bind the ids with the corresponding video devices |
1235 | * under the video bus. | |
4be44fcd | 1236 | */ |
1da177e4 LT |
1237 | |
1238 | static void | |
4be44fcd LB |
1239 | acpi_video_device_bind(struct acpi_video_bus *video, |
1240 | struct acpi_video_device *device) | |
1da177e4 | 1241 | { |
78eed028 | 1242 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1243 | int i; |
1da177e4 | 1244 | |
78eed028 DT |
1245 | for (i = 0; i < video->attached_count; i++) { |
1246 | ids = &video->attached_array[i]; | |
1247 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1248 | ids->bind_info = device; | |
1da177e4 LT |
1249 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1250 | } | |
1251 | } | |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | /* | |
1255 | * Arg: | |
21fcb34e | 1256 | * video : video bus device |
1da177e4 LT |
1257 | * |
1258 | * Return: | |
21fcb34e FC |
1259 | * < 0 : error |
1260 | * | |
1da177e4 LT |
1261 | * Call _DOD to enumerate all devices attached to display adapter |
1262 | * | |
4be44fcd | 1263 | */ |
1da177e4 LT |
1264 | |
1265 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1266 | { | |
4be44fcd LB |
1267 | int status; |
1268 | int count; | |
1269 | int i; | |
78eed028 | 1270 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1271 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1272 | union acpi_object *dod = NULL; | |
1273 | union acpi_object *obj; | |
1da177e4 | 1274 | |
90130268 | 1275 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1276 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1277 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1278 | return status; |
1da177e4 LT |
1279 | } |
1280 | ||
50dd0969 | 1281 | dod = buffer.pointer; |
1da177e4 | 1282 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1283 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1284 | status = -EFAULT; |
1285 | goto out; | |
1286 | } | |
1287 | ||
1288 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1289 | dod->package.count)); |
1da177e4 | 1290 | |
78eed028 DT |
1291 | active_list = kcalloc(1 + dod->package.count, |
1292 | sizeof(struct acpi_video_enumerated_device), | |
1293 | GFP_KERNEL); | |
1294 | if (!active_list) { | |
1da177e4 LT |
1295 | status = -ENOMEM; |
1296 | goto out; | |
1297 | } | |
1298 | ||
1299 | count = 0; | |
1300 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1301 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1302 | |
1303 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1304 | printk(KERN_ERR PREFIX |
1305 | "Invalid _DOD data in element %d\n", i); | |
1306 | continue; | |
1da177e4 | 1307 | } |
78eed028 DT |
1308 | |
1309 | active_list[count].value.int_val = obj->integer.value; | |
1310 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1311 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1312 | (int)obj->integer.value)); | |
1da177e4 LT |
1313 | count++; |
1314 | } | |
1da177e4 | 1315 | |
6044ec88 | 1316 | kfree(video->attached_array); |
4be44fcd | 1317 | |
78eed028 | 1318 | video->attached_array = active_list; |
1da177e4 | 1319 | video->attached_count = count; |
78eed028 DT |
1320 | |
1321 | out: | |
02438d87 | 1322 | kfree(buffer.pointer); |
d550d98d | 1323 | return status; |
1da177e4 LT |
1324 | } |
1325 | ||
4be44fcd LB |
1326 | static int |
1327 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1328 | u32 level_current, u32 event) | |
1da177e4 | 1329 | { |
63f0edfc | 1330 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1331 | max = max_below = 0; |
1332 | min = min_above = 255; | |
63f0edfc | 1333 | /* Find closest level to level_current */ |
0a3db1ce | 1334 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1335 | l = device->brightness->levels[i]; |
1336 | if (abs(l - level_current) < abs(delta)) { | |
1337 | delta = l - level_current; | |
1338 | if (!delta) | |
1339 | break; | |
1340 | } | |
1341 | } | |
1342 | /* Ajust level_current to closest available level */ | |
1343 | level_current += delta; | |
0a3db1ce | 1344 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1345 | l = device->brightness->levels[i]; |
1346 | if (l < min) | |
1347 | min = l; | |
1348 | if (l > max) | |
1349 | max = l; | |
1350 | if (l < min_above && l > level_current) | |
1351 | min_above = l; | |
1352 | if (l > max_below && l < level_current) | |
1353 | max_below = l; | |
1354 | } | |
1355 | ||
1356 | switch (event) { | |
1357 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1358 | return (level_current < max) ? min_above : min; | |
1359 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1360 | return (level_current < max) ? min_above : max; | |
1361 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1362 | return (level_current > min) ? max_below : min; | |
1363 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1364 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1365 | return 0; | |
1366 | default: | |
1367 | return level_current; | |
1368 | } | |
1da177e4 LT |
1369 | } |
1370 | ||
c8890f90 | 1371 | static int |
4be44fcd | 1372 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1373 | { |
27663c58 | 1374 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1375 | int result = -EINVAL; |
1376 | ||
8e5c2b77 RW |
1377 | /* no warning message if acpi_backlight=vendor is used */ |
1378 | if (!acpi_video_backlight_support()) | |
28c32e99 ZR |
1379 | return 0; |
1380 | ||
469778c1 | 1381 | if (!device->brightness) |
c8890f90 ZR |
1382 | goto out; |
1383 | ||
1384 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1385 | &level_current, |
1386 | false); | |
c8890f90 ZR |
1387 | if (result) |
1388 | goto out; | |
1389 | ||
1da177e4 | 1390 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1391 | |
24450c7a | 1392 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1393 | |
36342742 MG |
1394 | if (!result) |
1395 | backlight_force_update(device->backlight, | |
1396 | BACKLIGHT_UPDATE_HOTKEY); | |
1397 | ||
c8890f90 ZR |
1398 | out: |
1399 | if (result) | |
1400 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1401 | ||
1402 | return result; | |
1da177e4 LT |
1403 | } |
1404 | ||
e92a7162 MG |
1405 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1406 | void **edid) | |
1407 | { | |
1408 | struct acpi_video_bus *video; | |
1409 | struct acpi_video_device *video_device; | |
1410 | union acpi_object *buffer = NULL; | |
1411 | acpi_status status; | |
1412 | int i, length; | |
1413 | ||
1414 | if (!device || !acpi_driver_data(device)) | |
1415 | return -EINVAL; | |
1416 | ||
1417 | video = acpi_driver_data(device); | |
1418 | ||
1419 | for (i = 0; i < video->attached_count; i++) { | |
1420 | video_device = video->attached_array[i].bind_info; | |
1421 | length = 256; | |
1422 | ||
1423 | if (!video_device) | |
1424 | continue; | |
1425 | ||
82069552 ZR |
1426 | if (!video_device->cap._DDC) |
1427 | continue; | |
1428 | ||
e92a7162 MG |
1429 | if (type) { |
1430 | switch (type) { | |
1431 | case ACPI_VIDEO_DISPLAY_CRT: | |
1432 | if (!video_device->flags.crt) | |
1433 | continue; | |
1434 | break; | |
1435 | case ACPI_VIDEO_DISPLAY_TV: | |
1436 | if (!video_device->flags.tvout) | |
1437 | continue; | |
1438 | break; | |
1439 | case ACPI_VIDEO_DISPLAY_DVI: | |
1440 | if (!video_device->flags.dvi) | |
1441 | continue; | |
1442 | break; | |
1443 | case ACPI_VIDEO_DISPLAY_LCD: | |
1444 | if (!video_device->flags.lcd) | |
1445 | continue; | |
1446 | break; | |
1447 | } | |
1448 | } else if (video_device->device_id != device_id) { | |
1449 | continue; | |
1450 | } | |
1451 | ||
1452 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1453 | ||
1454 | if (ACPI_FAILURE(status) || !buffer || | |
1455 | buffer->type != ACPI_TYPE_BUFFER) { | |
1456 | length = 128; | |
1457 | status = acpi_video_device_EDID(video_device, &buffer, | |
1458 | length); | |
1459 | if (ACPI_FAILURE(status) || !buffer || | |
1460 | buffer->type != ACPI_TYPE_BUFFER) { | |
1461 | continue; | |
1462 | } | |
1463 | } | |
1464 | ||
1465 | *edid = buffer->buffer.pointer; | |
1466 | return length; | |
1467 | } | |
1468 | ||
1469 | return -ENODEV; | |
1470 | } | |
1471 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1472 | ||
1da177e4 | 1473 | static int |
4be44fcd LB |
1474 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1475 | struct acpi_device *device) | |
1da177e4 | 1476 | { |
fba4e087 | 1477 | int status = 0; |
ff102ea9 | 1478 | struct acpi_device *dev; |
1da177e4 | 1479 | |
fba4e087 IM |
1480 | /* |
1481 | * There are systems where video module known to work fine regardless | |
1482 | * of broken _DOD and ignoring returned value here doesn't cause | |
1483 | * any issues later. | |
1484 | */ | |
1485 | acpi_video_device_enumerate(video); | |
1da177e4 | 1486 | |
ff102ea9 | 1487 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1488 | |
1489 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1490 | if (status) { |
91e13aa3 AL |
1491 | dev_err(&dev->dev, "Can't attach device\n"); |
1492 | break; | |
1da177e4 | 1493 | } |
1da177e4 | 1494 | } |
d550d98d | 1495 | return status; |
1da177e4 LT |
1496 | } |
1497 | ||
4be44fcd | 1498 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
1da177e4 | 1499 | { |
031ec77b | 1500 | acpi_status status; |
1da177e4 LT |
1501 | |
1502 | if (!device || !device->video) | |
d550d98d | 1503 | return -ENOENT; |
1da177e4 | 1504 | |
91e13aa3 AL |
1505 | if (device->flags.notify) { |
1506 | status = acpi_remove_notify_handler(device->dev->handle, | |
1507 | ACPI_DEVICE_NOTIFY, acpi_video_device_notify); | |
1508 | if (ACPI_FAILURE(status)) | |
1509 | dev_err(&device->dev->dev, | |
1510 | "Can't remove video notify handler\n"); | |
cfa806f0 | 1511 | } |
91e13aa3 | 1512 | |
e29b3ee3 | 1513 | if (device->backlight) { |
e29b3ee3 KP |
1514 | backlight_device_unregister(device->backlight); |
1515 | device->backlight = NULL; | |
1516 | } | |
4a703a8f | 1517 | if (device->cooling_dev) { |
702ed512 ZR |
1518 | sysfs_remove_link(&device->dev->dev.kobj, |
1519 | "thermal_cooling"); | |
4a703a8f | 1520 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
702ed512 | 1521 | "device"); |
4a703a8f DT |
1522 | thermal_cooling_device_unregister(device->cooling_dev); |
1523 | device->cooling_dev = NULL; | |
702ed512 | 1524 | } |
ff102ea9 | 1525 | |
d550d98d | 1526 | return 0; |
1da177e4 LT |
1527 | } |
1528 | ||
4be44fcd | 1529 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1da177e4 | 1530 | { |
4be44fcd | 1531 | int status; |
ff102ea9 | 1532 | struct acpi_video_device *dev, *next; |
1da177e4 | 1533 | |
bbac81f5 | 1534 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1535 | |
ff102ea9 | 1536 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
1da177e4 | 1537 | |
ff102ea9 | 1538 | status = acpi_video_bus_put_one_device(dev); |
4be44fcd LB |
1539 | if (ACPI_FAILURE(status)) |
1540 | printk(KERN_WARNING PREFIX | |
1541 | "hhuuhhuu bug in acpi video driver.\n"); | |
1da177e4 | 1542 | |
ff102ea9 DT |
1543 | if (dev->brightness) { |
1544 | kfree(dev->brightness->levels); | |
1545 | kfree(dev->brightness); | |
1546 | } | |
1547 | list_del(&dev->entry); | |
1548 | kfree(dev); | |
1da177e4 LT |
1549 | } |
1550 | ||
bbac81f5 | 1551 | mutex_unlock(&video->device_list_lock); |
ff102ea9 | 1552 | |
d550d98d | 1553 | return 0; |
1da177e4 LT |
1554 | } |
1555 | ||
1556 | /* acpi_video interface */ | |
1557 | ||
efaa14c7 AL |
1558 | /* |
1559 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1560 | * preform any automatic brightness change on receiving a notification. | |
1561 | */ | |
4be44fcd | 1562 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1563 | { |
efaa14c7 AL |
1564 | return acpi_video_bus_DOS(video, 0, |
1565 | acpi_video_backlight_quirks() ? 1 : 0); | |
1da177e4 LT |
1566 | } |
1567 | ||
4be44fcd | 1568 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1569 | { |
efaa14c7 AL |
1570 | return acpi_video_bus_DOS(video, 0, |
1571 | acpi_video_backlight_quirks() ? 0 : 1); | |
1da177e4 LT |
1572 | } |
1573 | ||
7015558f | 1574 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1575 | { |
7015558f | 1576 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1577 | struct input_dev *input; |
17c452f9 | 1578 | int keycode = 0; |
e9dab196 | 1579 | |
1da177e4 | 1580 | if (!video) |
d550d98d | 1581 | return; |
1da177e4 | 1582 | |
e9dab196 | 1583 | input = video->input; |
1da177e4 LT |
1584 | |
1585 | switch (event) { | |
98fb8fe1 | 1586 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1587 | * most likely via hotkey. */ |
14e04fb3 | 1588 | acpi_bus_generate_proc_event(device, event, 0); |
8a37c65d | 1589 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1590 | break; |
1591 | ||
98fb8fe1 | 1592 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1593 | * connector. */ |
1594 | acpi_video_device_enumerate(video); | |
1595 | acpi_video_device_rebind(video); | |
14e04fb3 | 1596 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1597 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1598 | break; |
1599 | ||
4be44fcd | 1600 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
25c87f7f | 1601 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1602 | keycode = KEY_SWITCHVIDEOMODE; |
1603 | break; | |
4be44fcd | 1604 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
25c87f7f | 1605 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1606 | keycode = KEY_VIDEO_NEXT; |
1607 | break; | |
4be44fcd | 1608 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
14e04fb3 | 1609 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1610 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1611 | break; |
1612 | ||
1613 | default: | |
1614 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1615 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1616 | break; |
1617 | } | |
1618 | ||
8a37c65d LT |
1619 | if (acpi_notifier_call_chain(device, event, 0)) |
1620 | /* Something vetoed the keypress. */ | |
1621 | keycode = 0; | |
17c452f9 MG |
1622 | |
1623 | if (keycode) { | |
1624 | input_report_key(input, keycode, 1); | |
1625 | input_sync(input); | |
1626 | input_report_key(input, keycode, 0); | |
1627 | input_sync(input); | |
1628 | } | |
e9dab196 | 1629 | |
d550d98d | 1630 | return; |
1da177e4 LT |
1631 | } |
1632 | ||
4be44fcd | 1633 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1634 | { |
50dd0969 | 1635 | struct acpi_video_device *video_device = data; |
4be44fcd | 1636 | struct acpi_device *device = NULL; |
e9dab196 LY |
1637 | struct acpi_video_bus *bus; |
1638 | struct input_dev *input; | |
17c452f9 | 1639 | int keycode = 0; |
1da177e4 | 1640 | |
1da177e4 | 1641 | if (!video_device) |
d550d98d | 1642 | return; |
1da177e4 | 1643 | |
e6afa0de | 1644 | device = video_device->dev; |
e9dab196 LY |
1645 | bus = video_device->video; |
1646 | input = bus->input; | |
1da177e4 LT |
1647 | |
1648 | switch (event) { | |
4be44fcd | 1649 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1650 | if (brightness_switch_enabled) |
1651 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1652 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1653 | keycode = KEY_BRIGHTNESS_CYCLE; |
1654 | break; | |
4be44fcd | 1655 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1656 | if (brightness_switch_enabled) |
1657 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1658 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1659 | keycode = KEY_BRIGHTNESSUP; |
1660 | break; | |
4be44fcd | 1661 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1662 | if (brightness_switch_enabled) |
1663 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1664 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1665 | keycode = KEY_BRIGHTNESSDOWN; |
1666 | break; | |
70f23fd6 | 1667 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1668 | if (brightness_switch_enabled) |
1669 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1670 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1671 | keycode = KEY_BRIGHTNESS_ZERO; |
1672 | break; | |
4be44fcd | 1673 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1674 | if (brightness_switch_enabled) |
1675 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1676 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1677 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1678 | break; |
1679 | default: | |
1680 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1681 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1682 | break; |
1683 | } | |
e9dab196 | 1684 | |
7761f638 | 1685 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1686 | |
1687 | if (keycode) { | |
1688 | input_report_key(input, keycode, 1); | |
1689 | input_sync(input); | |
1690 | input_report_key(input, keycode, 0); | |
1691 | input_sync(input); | |
1692 | } | |
e9dab196 | 1693 | |
d550d98d | 1694 | return; |
1da177e4 LT |
1695 | } |
1696 | ||
ac7729da RW |
1697 | static int acpi_video_resume(struct notifier_block *nb, |
1698 | unsigned long val, void *ign) | |
863c1490 MG |
1699 | { |
1700 | struct acpi_video_bus *video; | |
1701 | struct acpi_video_device *video_device; | |
1702 | int i; | |
1703 | ||
ac7729da RW |
1704 | switch (val) { |
1705 | case PM_HIBERNATION_PREPARE: | |
1706 | case PM_SUSPEND_PREPARE: | |
1707 | case PM_RESTORE_PREPARE: | |
1708 | return NOTIFY_DONE; | |
1709 | } | |
863c1490 | 1710 | |
ac7729da RW |
1711 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1712 | ||
1713 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1714 | |
1715 | for (i = 0; i < video->attached_count; i++) { | |
1716 | video_device = video->attached_array[i].bind_info; | |
1717 | if (video_device && video_device->backlight) | |
1718 | acpi_video_set_brightness(video_device->backlight); | |
1719 | } | |
ac7729da RW |
1720 | |
1721 | return NOTIFY_OK; | |
863c1490 MG |
1722 | } |
1723 | ||
c504f8cb ZR |
1724 | static acpi_status |
1725 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1726 | void **return_value) | |
1727 | { | |
1728 | struct acpi_device *device = context; | |
1729 | struct acpi_device *sibling; | |
1730 | int result; | |
1731 | ||
1732 | if (handle == device->handle) | |
1733 | return AE_CTRL_TERMINATE; | |
1734 | ||
1735 | result = acpi_bus_get_device(handle, &sibling); | |
1736 | if (result) | |
1737 | return AE_OK; | |
1738 | ||
1739 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1740 | return AE_ALREADY_EXISTS; | |
1741 | ||
1742 | return AE_OK; | |
1743 | } | |
1744 | ||
ac7729da RW |
1745 | static int instance; |
1746 | ||
4be44fcd | 1747 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1748 | { |
f51e8391 | 1749 | struct acpi_video_bus *video; |
e9dab196 | 1750 | struct input_dev *input; |
f51e8391 | 1751 | int error; |
c504f8cb ZR |
1752 | acpi_status status; |
1753 | ||
1754 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1755 | device->parent->handle, 1, | |
1756 | acpi_video_bus_match, NULL, | |
1757 | device, NULL); | |
1758 | if (status == AE_ALREADY_EXISTS) { | |
1759 | printk(KERN_WARNING FW_BUG | |
1760 | "Duplicate ACPI video bus devices for the" | |
1761 | " same VGA controller, please try module " | |
1762 | "parameter \"video.allow_duplicates=1\"" | |
1763 | "if the current driver doesn't work.\n"); | |
1764 | if (!allow_duplicates) | |
1765 | return -ENODEV; | |
1766 | } | |
1da177e4 | 1767 | |
36bcbec7 | 1768 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1769 | if (!video) |
d550d98d | 1770 | return -ENOMEM; |
1da177e4 | 1771 | |
e6d9da1d ZR |
1772 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1773 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1774 | if (instance) | |
1775 | device->pnp.bus_id[3] = '0' + instance; | |
1776 | instance ++; | |
1777 | } | |
f3b39f13 ZY |
1778 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1779 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1780 | if (instance) | |
1781 | device->pnp.bus_id[3] = '0' + instance; | |
1782 | instance++; | |
1783 | } | |
e6d9da1d | 1784 | |
e6afa0de | 1785 | video->device = device; |
1da177e4 LT |
1786 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1787 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1788 | device->driver_data = video; |
1da177e4 LT |
1789 | |
1790 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1791 | error = acpi_video_bus_check(video); |
1792 | if (error) | |
1793 | goto err_free_video; | |
1da177e4 | 1794 | |
bbac81f5 | 1795 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1796 | INIT_LIST_HEAD(&video->video_device_list); |
1797 | ||
ea9f8856 IM |
1798 | error = acpi_video_bus_get_devices(video, device); |
1799 | if (error) | |
91e13aa3 | 1800 | goto err_put_video; |
1da177e4 | 1801 | |
e9dab196 | 1802 | video->input = input = input_allocate_device(); |
f51e8391 DT |
1803 | if (!input) { |
1804 | error = -ENOMEM; | |
b60e7f61 | 1805 | goto err_put_video; |
f51e8391 | 1806 | } |
e9dab196 | 1807 | |
b60e7f61 IM |
1808 | error = acpi_video_bus_start_devices(video); |
1809 | if (error) | |
1810 | goto err_free_input_dev; | |
1811 | ||
e9dab196 LY |
1812 | snprintf(video->phys, sizeof(video->phys), |
1813 | "%s/video/input0", acpi_device_hid(video->device)); | |
1814 | ||
1815 | input->name = acpi_device_name(video->device); | |
1816 | input->phys = video->phys; | |
1817 | input->id.bustype = BUS_HOST; | |
1818 | input->id.product = 0x06; | |
91c05c66 | 1819 | input->dev.parent = &device->dev; |
e9dab196 LY |
1820 | input->evbit[0] = BIT(EV_KEY); |
1821 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1822 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1823 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1824 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1825 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1826 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1827 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1828 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
e9dab196 | 1829 | |
1da177e4 | 1830 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1831 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1832 | video->flags.multihead ? "yes" : "no", | |
1833 | video->flags.rom ? "yes" : "no", | |
1834 | video->flags.post ? "yes" : "no"); | |
1da177e4 | 1835 | |
ac7729da RW |
1836 | video->pm_nb.notifier_call = acpi_video_resume; |
1837 | video->pm_nb.priority = 0; | |
ea9f8856 IM |
1838 | error = register_pm_notifier(&video->pm_nb); |
1839 | if (error) | |
301f33fb DC |
1840 | goto err_stop_video; |
1841 | ||
1842 | error = input_register_device(input); | |
1843 | if (error) | |
1844 | goto err_unregister_pm_notifier; | |
ac7729da | 1845 | |
f51e8391 DT |
1846 | return 0; |
1847 | ||
301f33fb DC |
1848 | err_unregister_pm_notifier: |
1849 | unregister_pm_notifier(&video->pm_nb); | |
f51e8391 DT |
1850 | err_stop_video: |
1851 | acpi_video_bus_stop_devices(video); | |
b60e7f61 IM |
1852 | err_free_input_dev: |
1853 | input_free_device(input); | |
ea9f8856 | 1854 | err_put_video: |
f51e8391 DT |
1855 | acpi_video_bus_put_devices(video); |
1856 | kfree(video->attached_array); | |
f51e8391 DT |
1857 | err_free_video: |
1858 | kfree(video); | |
db89b4f0 | 1859 | device->driver_data = NULL; |
1da177e4 | 1860 | |
f51e8391 | 1861 | return error; |
1da177e4 LT |
1862 | } |
1863 | ||
51fac838 | 1864 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1865 | { |
4be44fcd | 1866 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1867 | |
1da177e4 LT |
1868 | |
1869 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1870 | return -EINVAL; |
1da177e4 | 1871 | |
50dd0969 | 1872 | video = acpi_driver_data(device); |
1da177e4 | 1873 | |
ac7729da RW |
1874 | unregister_pm_notifier(&video->pm_nb); |
1875 | ||
1da177e4 | 1876 | acpi_video_bus_stop_devices(video); |
1da177e4 | 1877 | acpi_video_bus_put_devices(video); |
1da177e4 | 1878 | |
e9dab196 | 1879 | input_unregister_device(video->input); |
6044ec88 | 1880 | kfree(video->attached_array); |
1da177e4 LT |
1881 | kfree(video); |
1882 | ||
d550d98d | 1883 | return 0; |
1da177e4 LT |
1884 | } |
1885 | ||
c6996bdd AC |
1886 | static int __init is_i740(struct pci_dev *dev) |
1887 | { | |
1888 | if (dev->device == 0x00D1) | |
1889 | return 1; | |
1890 | if (dev->device == 0x7000) | |
1891 | return 1; | |
1892 | return 0; | |
1893 | } | |
1894 | ||
74a365b3 MG |
1895 | static int __init intel_opregion_present(void) |
1896 | { | |
c6996bdd | 1897 | int opregion = 0; |
74a365b3 MG |
1898 | struct pci_dev *dev = NULL; |
1899 | u32 address; | |
1900 | ||
1901 | for_each_pci_dev(dev) { | |
1902 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1903 | continue; | |
1904 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1905 | continue; | |
c6996bdd AC |
1906 | /* We don't want to poke around undefined i740 registers */ |
1907 | if (is_i740(dev)) | |
1908 | continue; | |
74a365b3 MG |
1909 | pci_read_config_dword(dev, 0xfc, &address); |
1910 | if (!address) | |
1911 | continue; | |
c6996bdd | 1912 | opregion = 1; |
74a365b3 | 1913 | } |
c6996bdd | 1914 | return opregion; |
74a365b3 MG |
1915 | } |
1916 | ||
8e5c2b77 | 1917 | int acpi_video_register(void) |
1da177e4 | 1918 | { |
8e5c2b77 | 1919 | int result = 0; |
86e437f0 ZY |
1920 | if (register_count) { |
1921 | /* | |
8e5c2b77 RW |
1922 | * if the function of acpi_video_register is already called, |
1923 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
1924 | */ |
1925 | return 0; | |
1926 | } | |
1da177e4 | 1927 | |
1da177e4 | 1928 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1929 | if (result < 0) |
d550d98d | 1930 | return -ENODEV; |
1da177e4 | 1931 | |
86e437f0 ZY |
1932 | /* |
1933 | * When the acpi_video_bus is loaded successfully, increase | |
1934 | * the counter reference. | |
1935 | */ | |
1936 | register_count = 1; | |
1937 | ||
d550d98d | 1938 | return 0; |
1da177e4 | 1939 | } |
8e5c2b77 | 1940 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 1941 | |
86e437f0 ZY |
1942 | void acpi_video_unregister(void) |
1943 | { | |
1944 | if (!register_count) { | |
1945 | /* | |
1946 | * If the acpi video bus is already unloaded, don't | |
1947 | * unload it again and return directly. | |
1948 | */ | |
1949 | return; | |
1950 | } | |
1951 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1952 | ||
86e437f0 ZY |
1953 | register_count = 0; |
1954 | ||
1955 | return; | |
1956 | } | |
1957 | EXPORT_SYMBOL(acpi_video_unregister); | |
1958 | ||
74a365b3 MG |
1959 | /* |
1960 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1961 | * the video opregion code to be run first in order to initialise | |
1962 | * state before any ACPI video calls are made. To handle this we defer | |
1963 | * registration of the video class until the opregion code has run. | |
1964 | */ | |
1965 | ||
1966 | static int __init acpi_video_init(void) | |
1967 | { | |
45cb50e6 ZR |
1968 | dmi_check_system(video_dmi_table); |
1969 | ||
74a365b3 MG |
1970 | if (intel_opregion_present()) |
1971 | return 0; | |
1972 | ||
1973 | return acpi_video_register(); | |
1974 | } | |
1da177e4 | 1975 | |
86e437f0 | 1976 | static void __exit acpi_video_exit(void) |
1da177e4 | 1977 | { |
86e437f0 | 1978 | acpi_video_unregister(); |
1da177e4 | 1979 | |
d550d98d | 1980 | return; |
1da177e4 LT |
1981 | } |
1982 | ||
1983 | module_init(acpi_video_init); | |
1984 | module_exit(acpi_video_exit); |