Commit | Line | Data |
---|---|---|
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> |
eb27cae8 | 40 | #include <linux/dmi.h> |
ac7729da | 41 | #include <linux/suspend.h> |
8b48463f | 42 | #include <linux/acpi.h> |
e92a7162 | 43 | #include <acpi/video.h> |
8b48463f | 44 | #include <asm/uaccess.h> |
1da177e4 | 45 | |
14ca7a47 | 46 | #define PREFIX "ACPI: " |
8c5bd7ad | 47 | |
1da177e4 LT |
48 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
49 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
50 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
51 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
52 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
53 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
54 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
55 | ||
f4715189 TT |
56 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
57 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
58 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
59 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
60 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 61 | |
2f3d000a | 62 | #define MAX_NAME_LEN 20 |
1da177e4 | 63 | |
1da177e4 | 64 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 65 | ACPI_MODULE_NAME("video"); |
1da177e4 | 66 | |
f52fd66d | 67 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 68 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
69 | MODULE_LICENSE("GPL"); |
70 | ||
2843768b | 71 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
72 | module_param(brightness_switch_enabled, bool, 0644); |
73 | ||
c504f8cb ZR |
74 | /* |
75 | * By default, we don't allow duplicate ACPI video bus devices | |
76 | * under the same VGA controller | |
77 | */ | |
90ab5ee9 | 78 | static bool allow_duplicates; |
c504f8cb ZR |
79 | module_param(allow_duplicates, bool, 0644); |
80 | ||
654a182d HG |
81 | static int disable_backlight_sysfs_if = -1; |
82 | module_param(disable_backlight_sysfs_if, int, 0444); | |
83 | ||
915ea7e4 | 84 | static int register_count; |
2a8b18e9 | 85 | static DEFINE_MUTEX(register_count_mutex); |
67b662e1 AL |
86 | static struct mutex video_list_lock; |
87 | static struct list_head video_bus_head; | |
4be44fcd | 88 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 89 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 90 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
93a291df | 91 | void acpi_video_detect_exit(void); |
1da177e4 | 92 | |
1ba90e3a TR |
93 | static const struct acpi_device_id video_device_ids[] = { |
94 | {ACPI_VIDEO_HID, 0}, | |
95 | {"", 0}, | |
96 | }; | |
97 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
98 | ||
1da177e4 | 99 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 100 | .name = "video", |
1da177e4 | 101 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 102 | .ids = video_device_ids, |
1da177e4 LT |
103 | .ops = { |
104 | .add = acpi_video_bus_add, | |
105 | .remove = acpi_video_bus_remove, | |
7015558f | 106 | .notify = acpi_video_bus_notify, |
4be44fcd | 107 | }, |
1da177e4 LT |
108 | }; |
109 | ||
110 | struct acpi_video_bus_flags { | |
4be44fcd LB |
111 | u8 multihead:1; /* can switch video heads */ |
112 | u8 rom:1; /* can retrieve a video rom */ | |
113 | u8 post:1; /* can configure the head to */ | |
114 | u8 reserved:5; | |
1da177e4 LT |
115 | }; |
116 | ||
117 | struct acpi_video_bus_cap { | |
21fcb34e FC |
118 | u8 _DOS:1; /* Enable/Disable output switching */ |
119 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
120 | u8 _ROM:1; /* Get ROM Data */ | |
121 | u8 _GPD:1; /* Get POST Device */ | |
122 | u8 _SPD:1; /* Set POST Device */ | |
123 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 124 | u8 reserved:2; |
1da177e4 LT |
125 | }; |
126 | ||
4be44fcd LB |
127 | struct acpi_video_device_attrib { |
128 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
129 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
130 | u32 display_type:4; /* Describe the specific type in use */ | |
131 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
132 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
133 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 134 | the VGA device. */ |
21fcb34e FC |
135 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
136 | u32 reserved:10; /* Must be 0 */ | |
137 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
138 | }; |
139 | ||
140 | struct acpi_video_enumerated_device { | |
141 | union { | |
142 | u32 int_val; | |
4be44fcd | 143 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
144 | } value; |
145 | struct acpi_video_device *bind_info; | |
146 | }; | |
147 | ||
148 | struct acpi_video_bus { | |
e6afa0de | 149 | struct acpi_device *device; |
99678ed7 | 150 | bool backlight_registered; |
4be44fcd | 151 | u8 dos_setting; |
1da177e4 | 152 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd | 153 | u8 attached_count; |
b4df4636 | 154 | u8 child_count; |
4be44fcd | 155 | struct acpi_video_bus_cap cap; |
1da177e4 | 156 | struct acpi_video_bus_flags flags; |
4be44fcd | 157 | struct list_head video_device_list; |
bbac81f5 | 158 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 159 | struct list_head entry; |
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 | 188 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
189 | }; |
190 | ||
1da177e4 | 191 | struct acpi_video_device_brightness { |
4be44fcd LB |
192 | int curr; |
193 | int count; | |
194 | int *levels; | |
d32f6947 | 195 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
196 | }; |
197 | ||
198 | struct acpi_video_device { | |
4be44fcd LB |
199 | unsigned long device_id; |
200 | struct acpi_video_device_flags flags; | |
201 | struct acpi_video_device_cap cap; | |
202 | struct list_head entry; | |
8ab58e8e LT |
203 | struct delayed_work switch_brightness_work; |
204 | int switch_brightness_event; | |
4be44fcd LB |
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); | |
8ab58e8e | 231 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 232 | |
21fcb34e | 233 | /* backlight device sysfs support */ |
2f3d000a YL |
234 | static int acpi_video_get_brightness(struct backlight_device *bd) |
235 | { | |
27663c58 | 236 | unsigned long long cur_level; |
38531e6f | 237 | int i; |
7c364e79 | 238 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 239 | |
a89803df | 240 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 241 | return -EINVAL; |
38531e6f MG |
242 | for (i = 2; i < vd->brightness->count; i++) { |
243 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
244 | /* |
245 | * The first two entries are special - see page 575 | |
246 | * of the ACPI spec 3.0 | |
247 | */ | |
915ea7e4 | 248 | return i - 2; |
38531e6f MG |
249 | } |
250 | return 0; | |
2f3d000a YL |
251 | } |
252 | ||
253 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
254 | { | |
24450c7a | 255 | int request_level = bd->props.brightness + 2; |
7c364e79 | 256 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 257 | |
8ab58e8e | 258 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
259 | return acpi_video_device_lcd_set_level(vd, |
260 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
261 | } |
262 | ||
acc2472e | 263 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
264 | .get_brightness = acpi_video_get_brightness, |
265 | .update_status = acpi_video_set_brightness, | |
266 | }; | |
267 | ||
702ed512 | 268 | /* thermal cooling device callbacks */ |
4a703a8f | 269 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 270 | long *state) |
702ed512 | 271 | { |
4a703a8f | 272 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
273 | struct acpi_video_device *video = acpi_driver_data(device); |
274 | ||
6503e5df MG |
275 | *state = video->brightness->count - 3; |
276 | return 0; | |
702ed512 ZR |
277 | } |
278 | ||
4a703a8f | 279 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 280 | long *state) |
702ed512 | 281 | { |
4a703a8f | 282 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 283 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 284 | unsigned long long level; |
6503e5df | 285 | int offset; |
702ed512 | 286 | |
a89803df | 287 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 288 | return -EINVAL; |
6503e5df MG |
289 | for (offset = 2; offset < video->brightness->count; offset++) |
290 | if (level == video->brightness->levels[offset]) { | |
291 | *state = video->brightness->count - offset - 1; | |
292 | return 0; | |
293 | } | |
702ed512 ZR |
294 | |
295 | return -EINVAL; | |
296 | } | |
297 | ||
298 | static int | |
4a703a8f | 299 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 300 | { |
4a703a8f | 301 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
302 | struct acpi_video_device *video = acpi_driver_data(device); |
303 | int level; | |
304 | ||
915ea7e4 | 305 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
306 | return -EINVAL; |
307 | ||
308 | state = video->brightness->count - state; | |
915ea7e4 | 309 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
310 | return acpi_video_device_lcd_set_level(video, level); |
311 | } | |
312 | ||
9c8b04be | 313 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
314 | .get_max_state = video_get_max_state, |
315 | .get_cur_state = video_get_cur_state, | |
316 | .set_cur_state = video_set_cur_state, | |
317 | }; | |
318 | ||
21fcb34e FC |
319 | /* |
320 | * -------------------------------------------------------------------------- | |
321 | * Video Management | |
322 | * -------------------------------------------------------------------------- | |
323 | */ | |
1da177e4 | 324 | |
1da177e4 | 325 | static int |
4be44fcd LB |
326 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
327 | union acpi_object **levels) | |
1da177e4 | 328 | { |
4be44fcd LB |
329 | int status; |
330 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
331 | union acpi_object *obj; | |
1da177e4 | 332 | |
1da177e4 LT |
333 | |
334 | *levels = NULL; | |
335 | ||
90130268 | 336 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 337 | if (!ACPI_SUCCESS(status)) |
d550d98d | 338 | return status; |
4be44fcd | 339 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 340 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 341 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
342 | status = -EFAULT; |
343 | goto err; | |
344 | } | |
345 | ||
346 | *levels = obj; | |
347 | ||
d550d98d | 348 | return 0; |
1da177e4 | 349 | |
915ea7e4 | 350 | err: |
6044ec88 | 351 | kfree(buffer.pointer); |
1da177e4 | 352 | |
d550d98d | 353 | return status; |
1da177e4 LT |
354 | } |
355 | ||
356 | static int | |
4be44fcd | 357 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 358 | { |
24450c7a | 359 | int status; |
9e6dada9 | 360 | int state; |
1da177e4 | 361 | |
0db98202 JL |
362 | status = acpi_execute_simple_method(device->dev->handle, |
363 | "_BCM", level); | |
24450c7a ZR |
364 | if (ACPI_FAILURE(status)) { |
365 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
366 | return -EIO; | |
367 | } | |
368 | ||
4500ca8e | 369 | device->brightness->curr = level; |
9e6dada9 | 370 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 371 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
372 | if (device->backlight) |
373 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
374 | return 0; |
375 | } | |
9e6dada9 | 376 | |
24450c7a ZR |
377 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
378 | return -EINVAL; | |
1da177e4 LT |
379 | } |
380 | ||
45cb50e6 ZR |
381 | /* |
382 | * For some buggy _BQC methods, we need to add a constant value to | |
383 | * the _BQC return value to get the actual current brightness level | |
384 | */ | |
385 | ||
386 | static int bqc_offset_aml_bug_workaround; | |
7ee33baa | 387 | static int video_set_bqc_offset(const struct dmi_system_id *d) |
45cb50e6 ZR |
388 | { |
389 | bqc_offset_aml_bug_workaround = 9; | |
390 | return 0; | |
391 | } | |
392 | ||
7ee33baa | 393 | static int video_disable_backlight_sysfs_if( |
654a182d HG |
394 | const struct dmi_system_id *d) |
395 | { | |
396 | if (disable_backlight_sysfs_if == -1) | |
397 | disable_backlight_sysfs_if = 1; | |
398 | return 0; | |
399 | } | |
400 | ||
7ee33baa | 401 | static struct dmi_system_id video_dmi_table[] = { |
45cb50e6 ZR |
402 | /* |
403 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
404 | */ | |
405 | { | |
406 | .callback = video_set_bqc_offset, | |
407 | .ident = "Acer Aspire 5720", | |
408 | .matches = { | |
409 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
410 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
411 | }, | |
412 | }, | |
5afc4abe LB |
413 | { |
414 | .callback = video_set_bqc_offset, | |
415 | .ident = "Acer Aspire 5710Z", | |
416 | .matches = { | |
417 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
418 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
419 | }, | |
420 | }, | |
34ac272b ZR |
421 | { |
422 | .callback = video_set_bqc_offset, | |
423 | .ident = "eMachines E510", | |
424 | .matches = { | |
425 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
426 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
427 | }, | |
428 | }, | |
93bcece2 ZR |
429 | { |
430 | .callback = video_set_bqc_offset, | |
431 | .ident = "Acer Aspire 5315", | |
432 | .matches = { | |
433 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
434 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
435 | }, | |
436 | }, | |
152a4e63 ZR |
437 | { |
438 | .callback = video_set_bqc_offset, | |
439 | .ident = "Acer Aspire 7720", | |
440 | .matches = { | |
441 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
442 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
443 | }, | |
444 | }, | |
5f24079b | 445 | |
654a182d HG |
446 | /* |
447 | * Some machines have a broken acpi-video interface for brightness | |
448 | * control, but still need an acpi_video_device_lcd_set_level() call | |
449 | * on resume to turn the backlight power on. We Enable backlight | |
450 | * control on these systems, but do not register a backlight sysfs | |
451 | * as brightness control does not work. | |
452 | */ | |
453 | { | |
454 | /* https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ | |
455 | .callback = video_disable_backlight_sysfs_if, | |
456 | .ident = "Toshiba Portege R830", | |
457 | .matches = { | |
458 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
459 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R830"), | |
460 | }, | |
461 | }, | |
45cb50e6 ZR |
462 | {} |
463 | }; | |
464 | ||
994fa63c DB |
465 | static unsigned long long |
466 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
467 | unsigned long long bqc_value) | |
468 | { | |
469 | unsigned long long level; | |
470 | ||
471 | if (device->brightness->flags._BQC_use_index) { | |
472 | /* | |
473 | * _BQC returns an index that doesn't account for | |
474 | * the first 2 items with special meaning, so we need | |
475 | * to compensate for that by offsetting ourselves | |
476 | */ | |
477 | if (device->brightness->flags._BCL_reversed) | |
478 | bqc_value = device->brightness->count - 3 - bqc_value; | |
479 | ||
480 | level = device->brightness->levels[bqc_value + 2]; | |
481 | } else { | |
482 | level = bqc_value; | |
483 | } | |
484 | ||
485 | level += bqc_offset_aml_bug_workaround; | |
486 | ||
487 | return level; | |
488 | } | |
489 | ||
1da177e4 | 490 | static int |
4be44fcd | 491 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 492 | unsigned long long *level, bool raw) |
1da177e4 | 493 | { |
c8890f90 | 494 | acpi_status status = AE_OK; |
4e231fa4 | 495 | int i; |
c8890f90 | 496 | |
c60d638e ZR |
497 | if (device->cap._BQC || device->cap._BCQ) { |
498 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
499 | ||
500 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
501 | NULL, level); |
502 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
503 | if (raw) { |
504 | /* | |
505 | * Caller has indicated he wants the raw | |
506 | * value returned by _BQC, so don't furtherly | |
507 | * mess with the value. | |
508 | */ | |
509 | return 0; | |
510 | } | |
511 | ||
994fa63c | 512 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 513 | |
4e231fa4 VS |
514 | for (i = 2; i < device->brightness->count; i++) |
515 | if (device->brightness->levels[i] == *level) { | |
516 | device->brightness->curr = *level; | |
517 | return 0; | |
915ea7e4 | 518 | } |
a89803df DB |
519 | /* |
520 | * BQC returned an invalid level. | |
521 | * Stop using it. | |
522 | */ | |
523 | ACPI_WARNING((AE_INFO, | |
524 | "%s returned an invalid level", | |
525 | buf)); | |
526 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 527 | } else { |
21fcb34e FC |
528 | /* |
529 | * Fixme: | |
c8890f90 ZR |
530 | * should we return an error or ignore this failure? |
531 | * dev->brightness->curr is a cached value which stores | |
532 | * the correct current backlight level in most cases. | |
533 | * ACPI video backlight still works w/ buggy _BQC. | |
534 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
535 | */ | |
c60d638e ZR |
536 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
537 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
538 | } |
539 | } | |
540 | ||
4500ca8e | 541 | *level = device->brightness->curr; |
c8890f90 | 542 | return 0; |
1da177e4 LT |
543 | } |
544 | ||
545 | static int | |
4be44fcd LB |
546 | acpi_video_device_EDID(struct acpi_video_device *device, |
547 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 548 | { |
4be44fcd LB |
549 | int status; |
550 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
551 | union acpi_object *obj; | |
552 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
553 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 554 | |
1da177e4 LT |
555 | |
556 | *edid = NULL; | |
557 | ||
558 | if (!device) | |
d550d98d | 559 | return -ENODEV; |
1da177e4 LT |
560 | if (length == 128) |
561 | arg0.integer.value = 1; | |
562 | else if (length == 256) | |
563 | arg0.integer.value = 2; | |
564 | else | |
d550d98d | 565 | return -EINVAL; |
1da177e4 | 566 | |
90130268 | 567 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 568 | if (ACPI_FAILURE(status)) |
d550d98d | 569 | return -ENODEV; |
1da177e4 | 570 | |
50dd0969 | 571 | obj = buffer.pointer; |
1da177e4 LT |
572 | |
573 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
574 | *edid = obj; | |
575 | else { | |
6468463a | 576 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
577 | status = -EFAULT; |
578 | kfree(obj); | |
579 | } | |
580 | ||
d550d98d | 581 | return status; |
1da177e4 LT |
582 | } |
583 | ||
1da177e4 LT |
584 | /* bus */ |
585 | ||
1da177e4 LT |
586 | /* |
587 | * Arg: | |
21fcb34e FC |
588 | * video : video bus device pointer |
589 | * bios_flag : | |
1da177e4 LT |
590 | * 0. The system BIOS should NOT automatically switch(toggle) |
591 | * the active display output. | |
592 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 593 | * active display output. No switch event. |
1da177e4 LT |
594 | * 2. The _DGS value should be locked. |
595 | * 3. The system BIOS should not automatically switch (toggle) the | |
596 | * active display output, but instead generate the display switch | |
597 | * event notify code. | |
598 | * lcd_flag : | |
599 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 600 | * of the LCD when the power changes from AC to DC |
21fcb34e | 601 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 602 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 603 | * Return Value: |
ea9f8856 | 604 | * -EINVAL wrong arg. |
1da177e4 LT |
605 | */ |
606 | ||
607 | static int | |
4be44fcd | 608 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 609 | { |
ea9f8856 | 610 | acpi_status status; |
1da177e4 | 611 | |
b0373843 ZR |
612 | if (!video->cap._DOS) |
613 | return 0; | |
1da177e4 | 614 | |
ea9f8856 IM |
615 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
616 | return -EINVAL; | |
0db98202 JL |
617 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
618 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
619 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
620 | if (ACPI_FAILURE(status)) |
621 | return -EIO; | |
1da177e4 | 622 | |
ea9f8856 | 623 | return 0; |
1da177e4 LT |
624 | } |
625 | ||
935e5f29 ZR |
626 | /* |
627 | * Simple comparison function used to sort backlight levels. | |
628 | */ | |
629 | ||
630 | static int | |
631 | acpi_video_cmp_level(const void *a, const void *b) | |
632 | { | |
633 | return *(int *)a - *(int *)b; | |
634 | } | |
635 | ||
a50188da AL |
636 | /* |
637 | * Decides if _BQC/_BCQ for this system is usable | |
638 | * | |
639 | * We do this by changing the level first and then read out the current | |
640 | * brightness level, if the value does not match, find out if it is using | |
641 | * index. If not, clear the _BQC/_BCQ capability. | |
642 | */ | |
643 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
644 | int max_level, int current_level) | |
645 | { | |
646 | struct acpi_video_device_brightness *br = device->brightness; | |
647 | int result; | |
648 | unsigned long long level; | |
649 | int test_level; | |
650 | ||
651 | /* don't mess with existing known broken systems */ | |
652 | if (bqc_offset_aml_bug_workaround) | |
653 | return 0; | |
654 | ||
655 | /* | |
656 | * Some systems always report current brightness level as maximum | |
657 | * through _BQC, we need to test another value for them. | |
658 | */ | |
b3b301c5 | 659 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
660 | |
661 | result = acpi_video_device_lcd_set_level(device, test_level); | |
662 | if (result) | |
663 | return result; | |
664 | ||
665 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
666 | if (result) | |
667 | return result; | |
668 | ||
669 | if (level != test_level) { | |
670 | /* buggy _BQC found, need to find out if it uses index */ | |
671 | if (level < br->count) { | |
672 | if (br->flags._BCL_reversed) | |
673 | level = br->count - 3 - level; | |
674 | if (br->levels[level + 2] == test_level) | |
675 | br->flags._BQC_use_index = 1; | |
676 | } | |
677 | ||
678 | if (!br->flags._BQC_use_index) | |
679 | device->cap._BQC = device->cap._BCQ = 0; | |
680 | } | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | ||
1da177e4 | 686 | /* |
21fcb34e FC |
687 | * Arg: |
688 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
689 | * |
690 | * Return Value: | |
469778c1 JJ |
691 | * Maximum brightness level |
692 | * | |
693 | * Allocate and initialize device->brightness. | |
694 | */ | |
695 | ||
696 | static int | |
697 | acpi_video_init_brightness(struct acpi_video_device *device) | |
698 | { | |
699 | union acpi_object *obj = NULL; | |
d32f6947 | 700 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 701 | unsigned long long level, level_old; |
469778c1 JJ |
702 | union acpi_object *o; |
703 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 704 | int result = -EINVAL; |
bd8ba205 | 705 | u32 value; |
469778c1 JJ |
706 | |
707 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
708 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
709 | "LCD brightness level\n")); | |
710 | goto out; | |
711 | } | |
712 | ||
713 | if (obj->package.count < 2) | |
714 | goto out; | |
715 | ||
716 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
717 | if (!br) { | |
718 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 719 | result = -ENOMEM; |
469778c1 JJ |
720 | goto out; |
721 | } | |
722 | ||
d32f6947 | 723 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 724 | GFP_KERNEL); |
1a7c618a ZR |
725 | if (!br->levels) { |
726 | result = -ENOMEM; | |
469778c1 | 727 | goto out_free; |
1a7c618a | 728 | } |
469778c1 JJ |
729 | |
730 | for (i = 0; i < obj->package.count; i++) { | |
731 | o = (union acpi_object *)&obj->package.elements[i]; | |
732 | if (o->type != ACPI_TYPE_INTEGER) { | |
733 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
734 | continue; | |
735 | } | |
bd8ba205 HG |
736 | value = (u32) o->integer.value; |
737 | /* Skip duplicate entries */ | |
738 | if (count > 2 && br->levels[count - 1] == value) | |
739 | continue; | |
740 | ||
741 | br->levels[count] = value; | |
469778c1 JJ |
742 | |
743 | if (br->levels[count] > max_level) | |
744 | max_level = br->levels[count]; | |
745 | count++; | |
746 | } | |
747 | ||
d32f6947 ZR |
748 | /* |
749 | * some buggy BIOS don't export the levels | |
750 | * when machine is on AC/Battery in _BCL package. | |
751 | * In this case, the first two elements in _BCL packages | |
752 | * are also supported brightness levels that OS should take care of. | |
753 | */ | |
90af2cf6 ZR |
754 | for (i = 2; i < count; i++) { |
755 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 756 | level_ac_battery++; |
90af2cf6 ZR |
757 | if (br->levels[i] == br->levels[1]) |
758 | level_ac_battery++; | |
759 | } | |
d32f6947 ZR |
760 | |
761 | if (level_ac_battery < 2) { | |
762 | level_ac_battery = 2 - level_ac_battery; | |
763 | br->flags._BCL_no_ac_battery_levels = 1; | |
764 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
765 | br->levels[i] = br->levels[i - level_ac_battery]; | |
766 | count += level_ac_battery; | |
767 | } else if (level_ac_battery > 2) | |
bf6787eb | 768 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 769 | |
d80fb99f ZR |
770 | /* Check if the _BCL package is in a reversed order */ |
771 | if (max_level == br->levels[2]) { | |
772 | br->flags._BCL_reversed = 1; | |
773 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
774 | acpi_video_cmp_level, NULL); | |
775 | } else if (max_level != br->levels[count - 1]) | |
776 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 777 | "Found unordered _BCL package")); |
469778c1 JJ |
778 | |
779 | br->count = count; | |
780 | device->brightness = br; | |
1a7c618a | 781 | |
1a7c618a | 782 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 783 | br->curr = level = max_level; |
e047cca6 ZR |
784 | |
785 | if (!device->cap._BQC) | |
786 | goto set_level; | |
787 | ||
a89803df DB |
788 | result = acpi_video_device_lcd_get_level_current(device, |
789 | &level_old, true); | |
1a7c618a ZR |
790 | if (result) |
791 | goto out_free_levels; | |
792 | ||
a50188da | 793 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
794 | if (result) |
795 | goto out_free_levels; | |
a50188da AL |
796 | /* |
797 | * cap._BQC may get cleared due to _BQC is found to be broken | |
798 | * in acpi_video_bqc_quirk, so check again here. | |
799 | */ | |
800 | if (!device->cap._BQC) | |
801 | goto set_level; | |
e047cca6 | 802 | |
545ef368 AL |
803 | level = acpi_video_bqc_value_to_level(device, level_old); |
804 | /* | |
805 | * On some buggy laptops, _BQC returns an uninitialized | |
806 | * value when invoked for the first time, i.e. | |
807 | * level_old is invalid (no matter whether it's a level | |
808 | * or an index). Set the backlight to max_level in this case. | |
809 | */ | |
810 | for (i = 2; i < br->count; i++) | |
811 | if (level == br->levels[i]) | |
812 | break; | |
813 | if (i == br->count || !level) | |
814 | level = max_level; | |
e047cca6 | 815 | |
e047cca6 | 816 | set_level: |
90c53ca4 | 817 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
818 | if (result) |
819 | goto out_free_levels; | |
1a7c618a | 820 | |
d32f6947 ZR |
821 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
822 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 823 | kfree(obj); |
1a7c618a | 824 | return result; |
469778c1 JJ |
825 | |
826 | out_free_levels: | |
827 | kfree(br->levels); | |
828 | out_free: | |
829 | kfree(br); | |
830 | out: | |
831 | device->brightness = NULL; | |
832 | kfree(obj); | |
1a7c618a | 833 | return result; |
469778c1 JJ |
834 | } |
835 | ||
836 | /* | |
837 | * Arg: | |
838 | * device : video output device (LCD, CRT, ..) | |
839 | * | |
840 | * Return Value: | |
21fcb34e | 841 | * None |
1da177e4 | 842 | * |
98fb8fe1 | 843 | * Find out all required AML methods defined under the output |
1da177e4 LT |
844 | * device. |
845 | */ | |
846 | ||
4be44fcd | 847 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 848 | { |
952c63e9 | 849 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 850 | device->cap._ADR = 1; |
952c63e9 | 851 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 852 | device->cap._BCL = 1; |
952c63e9 | 853 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 854 | device->cap._BCM = 1; |
952c63e9 | 855 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 856 | device->cap._BQC = 1; |
952c63e9 | 857 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
858 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
859 | device->cap._BCQ = 1; | |
860 | } | |
861 | ||
952c63e9 | 862 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 863 | device->cap._DDC = 1; |
1da177e4 LT |
864 | } |
865 | ||
866 | /* | |
21fcb34e FC |
867 | * Arg: |
868 | * device : video output device (VGA) | |
1da177e4 LT |
869 | * |
870 | * Return Value: | |
21fcb34e | 871 | * None |
1da177e4 | 872 | * |
98fb8fe1 | 873 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
874 | */ |
875 | ||
4be44fcd | 876 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 877 | { |
952c63e9 | 878 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 879 | video->cap._DOS = 1; |
952c63e9 | 880 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 881 | video->cap._DOD = 1; |
952c63e9 | 882 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 883 | video->cap._ROM = 1; |
952c63e9 | 884 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 885 | video->cap._GPD = 1; |
952c63e9 | 886 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 887 | video->cap._SPD = 1; |
952c63e9 | 888 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 889 | video->cap._VPO = 1; |
1da177e4 LT |
890 | } |
891 | ||
892 | /* | |
893 | * Check whether the video bus device has required AML method to | |
894 | * support the desired features | |
895 | */ | |
896 | ||
4be44fcd | 897 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 898 | { |
4be44fcd | 899 | acpi_status status = -ENOENT; |
1e4cffe7 | 900 | struct pci_dev *dev; |
1da177e4 LT |
901 | |
902 | if (!video) | |
d550d98d | 903 | return -EINVAL; |
1da177e4 | 904 | |
1e4cffe7 | 905 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
906 | if (!dev) |
907 | return -ENODEV; | |
1e4cffe7 | 908 | pci_dev_put(dev); |
22c13f9d | 909 | |
21fcb34e FC |
910 | /* |
911 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
912 | * to check well known required nodes. |
913 | */ | |
914 | ||
98fb8fe1 | 915 | /* Does this device support video switching? */ |
3a1151e3 SB |
916 | if (video->cap._DOS || video->cap._DOD) { |
917 | if (!video->cap._DOS) { | |
918 | printk(KERN_WARNING FW_BUG | |
919 | "ACPI(%s) defines _DOD but not _DOS\n", | |
920 | acpi_device_bid(video->device)); | |
921 | } | |
1da177e4 LT |
922 | video->flags.multihead = 1; |
923 | status = 0; | |
924 | } | |
925 | ||
98fb8fe1 | 926 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 927 | if (video->cap._ROM) { |
1da177e4 LT |
928 | video->flags.rom = 1; |
929 | status = 0; | |
930 | } | |
931 | ||
98fb8fe1 | 932 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 933 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
934 | video->flags.post = 1; |
935 | status = 0; | |
936 | } | |
937 | ||
d550d98d | 938 | return status; |
1da177e4 LT |
939 | } |
940 | ||
21fcb34e FC |
941 | /* |
942 | * -------------------------------------------------------------------------- | |
943 | * Driver Interface | |
944 | * -------------------------------------------------------------------------- | |
945 | */ | |
1da177e4 LT |
946 | |
947 | /* device interface */ | |
915ea7e4 | 948 | static struct acpi_video_device_attrib * |
82cae999 RZ |
949 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
950 | { | |
78eed028 DT |
951 | struct acpi_video_enumerated_device *ids; |
952 | int i; | |
953 | ||
954 | for (i = 0; i < video->attached_count; i++) { | |
955 | ids = &video->attached_array[i]; | |
956 | if ((ids->value.int_val & 0xffff) == device_id) | |
957 | return &ids->value.attrib; | |
958 | } | |
82cae999 | 959 | |
82cae999 RZ |
960 | return NULL; |
961 | } | |
1da177e4 | 962 | |
e92a7162 MG |
963 | static int |
964 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
965 | unsigned long device_id) | |
966 | { | |
967 | struct acpi_video_enumerated_device *ids; | |
968 | int i; | |
969 | ||
970 | for (i = 0; i < video->attached_count; i++) { | |
971 | ids = &video->attached_array[i]; | |
972 | if ((ids->value.int_val & 0xffff) == device_id) | |
973 | return ids->value.int_val; | |
974 | } | |
975 | ||
976 | return 0; | |
977 | } | |
978 | ||
1da177e4 | 979 | static int |
4be44fcd LB |
980 | acpi_video_bus_get_one_device(struct acpi_device *device, |
981 | struct acpi_video_bus *video) | |
1da177e4 | 982 | { |
27663c58 | 983 | unsigned long long device_id; |
e92a7162 | 984 | int status, device_type; |
4be44fcd | 985 | struct acpi_video_device *data; |
915ea7e4 | 986 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 987 | |
4be44fcd LB |
988 | status = |
989 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
990 | /* Some device omits _ADR, we skip them instead of fail */ |
991 | if (ACPI_FAILURE(status)) | |
992 | return 0; | |
1da177e4 | 993 | |
91e13aa3 AL |
994 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
995 | if (!data) | |
996 | return -ENOMEM; | |
82cae999 | 997 | |
91e13aa3 AL |
998 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
999 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1000 | device->driver_data = data; | |
1001 | ||
1002 | data->device_id = device_id; | |
1003 | data->video = video; | |
1004 | data->dev = device; | |
8ab58e8e LT |
1005 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1006 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1007 | |
1008 | attribute = acpi_video_get_device_attr(video, device_id); | |
1009 | ||
915ea7e4 | 1010 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1011 | switch (attribute->display_type) { |
1012 | case ACPI_VIDEO_DISPLAY_CRT: | |
1013 | data->flags.crt = 1; | |
1014 | break; | |
1015 | case ACPI_VIDEO_DISPLAY_TV: | |
1016 | data->flags.tvout = 1; | |
1017 | break; | |
1018 | case ACPI_VIDEO_DISPLAY_DVI: | |
1019 | data->flags.dvi = 1; | |
1020 | break; | |
1021 | case ACPI_VIDEO_DISPLAY_LCD: | |
1022 | data->flags.lcd = 1; | |
1023 | break; | |
1024 | default: | |
1025 | data->flags.unknown = 1; | |
1026 | break; | |
1027 | } | |
915ea7e4 | 1028 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1029 | data->flags.bios = 1; |
1030 | } else { | |
1031 | /* Check for legacy IDs */ | |
1032 | device_type = acpi_video_get_device_type(video, device_id); | |
1033 | /* Ignore bits 16 and 18-20 */ | |
1034 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1035 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1036 | data->flags.crt = 1; | |
1037 | break; | |
1038 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1039 | data->flags.lcd = 1; | |
1040 | break; | |
1041 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1042 | data->flags.tvout = 1; | |
1043 | break; | |
1044 | default: | |
1045 | data->flags.unknown = 1; | |
e92a7162 | 1046 | } |
91e13aa3 | 1047 | } |
4be44fcd | 1048 | |
91e13aa3 AL |
1049 | acpi_video_device_bind(video, data); |
1050 | acpi_video_device_find_cap(data); | |
1da177e4 | 1051 | |
91e13aa3 AL |
1052 | mutex_lock(&video->device_list_lock); |
1053 | list_add_tail(&data->entry, &video->video_device_list); | |
1054 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1055 | |
91e13aa3 | 1056 | return status; |
1da177e4 LT |
1057 | } |
1058 | ||
1059 | /* | |
1060 | * Arg: | |
21fcb34e | 1061 | * video : video bus device |
1da177e4 LT |
1062 | * |
1063 | * Return: | |
21fcb34e FC |
1064 | * none |
1065 | * | |
1066 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1067 | * bind the ids with the corresponding video devices |
1068 | * under the video bus. | |
4be44fcd | 1069 | */ |
1da177e4 | 1070 | |
4be44fcd | 1071 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1072 | { |
ff102ea9 DT |
1073 | struct acpi_video_device *dev; |
1074 | ||
bbac81f5 | 1075 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1076 | |
1077 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1078 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1079 | |
bbac81f5 | 1080 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1081 | } |
1082 | ||
1083 | /* | |
1084 | * Arg: | |
21fcb34e FC |
1085 | * video : video bus device |
1086 | * device : video output device under the video | |
1087 | * bus | |
1da177e4 LT |
1088 | * |
1089 | * Return: | |
21fcb34e FC |
1090 | * none |
1091 | * | |
1da177e4 LT |
1092 | * Bind the ids with the corresponding video devices |
1093 | * under the video bus. | |
4be44fcd | 1094 | */ |
1da177e4 LT |
1095 | |
1096 | static void | |
4be44fcd LB |
1097 | acpi_video_device_bind(struct acpi_video_bus *video, |
1098 | struct acpi_video_device *device) | |
1da177e4 | 1099 | { |
78eed028 | 1100 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1101 | int i; |
1da177e4 | 1102 | |
78eed028 DT |
1103 | for (i = 0; i < video->attached_count; i++) { |
1104 | ids = &video->attached_array[i]; | |
1105 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1106 | ids->bind_info = device; | |
1da177e4 LT |
1107 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1108 | } | |
1109 | } | |
1da177e4 LT |
1110 | } |
1111 | ||
0b8db271 AL |
1112 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1113 | { | |
1114 | struct acpi_video_bus *video = device->video; | |
1115 | int i; | |
1116 | ||
b4df4636 AL |
1117 | /* |
1118 | * If we have a broken _DOD or we have more than 8 output devices | |
1119 | * under the graphics controller node that we can't proper deal with | |
1120 | * in the operation region code currently, no need to test. | |
1121 | */ | |
1122 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1123 | return true; |
1124 | ||
1125 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1126 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1127 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1128 | return true; |
1129 | } | |
1130 | ||
1131 | return false; | |
1132 | } | |
1133 | ||
1da177e4 LT |
1134 | /* |
1135 | * Arg: | |
21fcb34e | 1136 | * video : video bus device |
1da177e4 LT |
1137 | * |
1138 | * Return: | |
21fcb34e FC |
1139 | * < 0 : error |
1140 | * | |
1da177e4 LT |
1141 | * Call _DOD to enumerate all devices attached to display adapter |
1142 | * | |
4be44fcd | 1143 | */ |
1da177e4 LT |
1144 | |
1145 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1146 | { | |
4be44fcd LB |
1147 | int status; |
1148 | int count; | |
1149 | int i; | |
78eed028 | 1150 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1151 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1152 | union acpi_object *dod = NULL; | |
1153 | union acpi_object *obj; | |
1da177e4 | 1154 | |
90130268 | 1155 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1156 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1157 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1158 | return status; |
1da177e4 LT |
1159 | } |
1160 | ||
50dd0969 | 1161 | dod = buffer.pointer; |
1da177e4 | 1162 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1163 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1164 | status = -EFAULT; |
1165 | goto out; | |
1166 | } | |
1167 | ||
1168 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1169 | dod->package.count)); |
1da177e4 | 1170 | |
78eed028 DT |
1171 | active_list = kcalloc(1 + dod->package.count, |
1172 | sizeof(struct acpi_video_enumerated_device), | |
1173 | GFP_KERNEL); | |
1174 | if (!active_list) { | |
1da177e4 LT |
1175 | status = -ENOMEM; |
1176 | goto out; | |
1177 | } | |
1178 | ||
1179 | count = 0; | |
1180 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1181 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1182 | |
1183 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1184 | printk(KERN_ERR PREFIX |
1185 | "Invalid _DOD data in element %d\n", i); | |
1186 | continue; | |
1da177e4 | 1187 | } |
78eed028 DT |
1188 | |
1189 | active_list[count].value.int_val = obj->integer.value; | |
1190 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1191 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1192 | (int)obj->integer.value)); | |
1da177e4 LT |
1193 | count++; |
1194 | } | |
1da177e4 | 1195 | |
6044ec88 | 1196 | kfree(video->attached_array); |
4be44fcd | 1197 | |
78eed028 | 1198 | video->attached_array = active_list; |
1da177e4 | 1199 | video->attached_count = count; |
78eed028 | 1200 | |
915ea7e4 | 1201 | out: |
02438d87 | 1202 | kfree(buffer.pointer); |
d550d98d | 1203 | return status; |
1da177e4 LT |
1204 | } |
1205 | ||
4be44fcd LB |
1206 | static int |
1207 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1208 | u32 level_current, u32 event) | |
1da177e4 | 1209 | { |
63f0edfc | 1210 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1211 | max = max_below = 0; |
1212 | min = min_above = 255; | |
63f0edfc | 1213 | /* Find closest level to level_current */ |
0a3db1ce | 1214 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1215 | l = device->brightness->levels[i]; |
1216 | if (abs(l - level_current) < abs(delta)) { | |
1217 | delta = l - level_current; | |
1218 | if (!delta) | |
1219 | break; | |
1220 | } | |
1221 | } | |
1222 | /* Ajust level_current to closest available level */ | |
1223 | level_current += delta; | |
0a3db1ce | 1224 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1225 | l = device->brightness->levels[i]; |
1226 | if (l < min) | |
1227 | min = l; | |
1228 | if (l > max) | |
1229 | max = l; | |
1230 | if (l < min_above && l > level_current) | |
1231 | min_above = l; | |
1232 | if (l > max_below && l < level_current) | |
1233 | max_below = l; | |
1234 | } | |
1235 | ||
1236 | switch (event) { | |
1237 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1238 | return (level_current < max) ? min_above : min; | |
1239 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1240 | return (level_current < max) ? min_above : max; | |
1241 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1242 | return (level_current > min) ? max_below : min; | |
1243 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1244 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1245 | return 0; | |
1246 | default: | |
1247 | return level_current; | |
1248 | } | |
1da177e4 LT |
1249 | } |
1250 | ||
8ab58e8e LT |
1251 | static void |
1252 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1253 | { |
8ab58e8e LT |
1254 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1255 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1256 | unsigned long long level_current, level_next; |
8ab58e8e | 1257 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1258 | int result = -EINVAL; |
1259 | ||
fbc9fe1b | 1260 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
654a182d | 1261 | if (!device->backlight) |
8ab58e8e | 1262 | return; |
28c32e99 | 1263 | |
469778c1 | 1264 | if (!device->brightness) |
c8890f90 ZR |
1265 | goto out; |
1266 | ||
1267 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1268 | &level_current, |
1269 | false); | |
c8890f90 ZR |
1270 | if (result) |
1271 | goto out; | |
1272 | ||
1da177e4 | 1273 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1274 | |
24450c7a | 1275 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1276 | |
36342742 MG |
1277 | if (!result) |
1278 | backlight_force_update(device->backlight, | |
1279 | BACKLIGHT_UPDATE_HOTKEY); | |
1280 | ||
c8890f90 ZR |
1281 | out: |
1282 | if (result) | |
1283 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1284 | } |
1285 | ||
e92a7162 MG |
1286 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1287 | void **edid) | |
1288 | { | |
1289 | struct acpi_video_bus *video; | |
1290 | struct acpi_video_device *video_device; | |
1291 | union acpi_object *buffer = NULL; | |
1292 | acpi_status status; | |
1293 | int i, length; | |
1294 | ||
1295 | if (!device || !acpi_driver_data(device)) | |
1296 | return -EINVAL; | |
1297 | ||
1298 | video = acpi_driver_data(device); | |
1299 | ||
1300 | for (i = 0; i < video->attached_count; i++) { | |
1301 | video_device = video->attached_array[i].bind_info; | |
1302 | length = 256; | |
1303 | ||
1304 | if (!video_device) | |
1305 | continue; | |
1306 | ||
82069552 ZR |
1307 | if (!video_device->cap._DDC) |
1308 | continue; | |
1309 | ||
e92a7162 MG |
1310 | if (type) { |
1311 | switch (type) { | |
1312 | case ACPI_VIDEO_DISPLAY_CRT: | |
1313 | if (!video_device->flags.crt) | |
1314 | continue; | |
1315 | break; | |
1316 | case ACPI_VIDEO_DISPLAY_TV: | |
1317 | if (!video_device->flags.tvout) | |
1318 | continue; | |
1319 | break; | |
1320 | case ACPI_VIDEO_DISPLAY_DVI: | |
1321 | if (!video_device->flags.dvi) | |
1322 | continue; | |
1323 | break; | |
1324 | case ACPI_VIDEO_DISPLAY_LCD: | |
1325 | if (!video_device->flags.lcd) | |
1326 | continue; | |
1327 | break; | |
1328 | } | |
1329 | } else if (video_device->device_id != device_id) { | |
1330 | continue; | |
1331 | } | |
1332 | ||
1333 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1334 | ||
1335 | if (ACPI_FAILURE(status) || !buffer || | |
1336 | buffer->type != ACPI_TYPE_BUFFER) { | |
1337 | length = 128; | |
1338 | status = acpi_video_device_EDID(video_device, &buffer, | |
1339 | length); | |
1340 | if (ACPI_FAILURE(status) || !buffer || | |
1341 | buffer->type != ACPI_TYPE_BUFFER) { | |
1342 | continue; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | *edid = buffer->buffer.pointer; | |
1347 | return length; | |
1348 | } | |
1349 | ||
1350 | return -ENODEV; | |
1351 | } | |
1352 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1353 | ||
1da177e4 | 1354 | static int |
4be44fcd LB |
1355 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1356 | struct acpi_device *device) | |
1da177e4 | 1357 | { |
fba4e087 | 1358 | int status = 0; |
ff102ea9 | 1359 | struct acpi_device *dev; |
1da177e4 | 1360 | |
fba4e087 IM |
1361 | /* |
1362 | * There are systems where video module known to work fine regardless | |
1363 | * of broken _DOD and ignoring returned value here doesn't cause | |
1364 | * any issues later. | |
1365 | */ | |
1366 | acpi_video_device_enumerate(video); | |
1da177e4 | 1367 | |
ff102ea9 | 1368 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1369 | |
1370 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1371 | if (status) { |
91e13aa3 AL |
1372 | dev_err(&dev->dev, "Can't attach device\n"); |
1373 | break; | |
1da177e4 | 1374 | } |
b4df4636 | 1375 | video->child_count++; |
1da177e4 | 1376 | } |
d550d98d | 1377 | return status; |
1da177e4 LT |
1378 | } |
1379 | ||
1da177e4 LT |
1380 | /* acpi_video interface */ |
1381 | ||
efaa14c7 AL |
1382 | /* |
1383 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1384 | * preform any automatic brightness change on receiving a notification. | |
1385 | */ | |
4be44fcd | 1386 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1387 | { |
efaa14c7 | 1388 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1389 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1390 | } |
1391 | ||
4be44fcd | 1392 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1393 | { |
efaa14c7 | 1394 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1395 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1396 | } |
1397 | ||
7015558f | 1398 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1399 | { |
7015558f | 1400 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1401 | struct input_dev *input; |
17c452f9 | 1402 | int keycode = 0; |
e9dab196 | 1403 | |
67b662e1 | 1404 | if (!video || !video->input) |
d550d98d | 1405 | return; |
1da177e4 | 1406 | |
e9dab196 | 1407 | input = video->input; |
1da177e4 LT |
1408 | |
1409 | switch (event) { | |
98fb8fe1 | 1410 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1411 | * most likely via hotkey. */ |
8a37c65d | 1412 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1413 | break; |
1414 | ||
98fb8fe1 | 1415 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1416 | * connector. */ |
1417 | acpi_video_device_enumerate(video); | |
1418 | acpi_video_device_rebind(video); | |
e9dab196 | 1419 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1420 | break; |
1421 | ||
4be44fcd | 1422 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1423 | keycode = KEY_SWITCHVIDEOMODE; |
1424 | break; | |
4be44fcd | 1425 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1426 | keycode = KEY_VIDEO_NEXT; |
1427 | break; | |
4be44fcd | 1428 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1429 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1430 | break; |
1431 | ||
1432 | default: | |
1433 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1434 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1435 | break; |
1436 | } | |
1437 | ||
8a37c65d LT |
1438 | if (acpi_notifier_call_chain(device, event, 0)) |
1439 | /* Something vetoed the keypress. */ | |
1440 | keycode = 0; | |
17c452f9 MG |
1441 | |
1442 | if (keycode) { | |
1443 | input_report_key(input, keycode, 1); | |
1444 | input_sync(input); | |
1445 | input_report_key(input, keycode, 0); | |
1446 | input_sync(input); | |
1447 | } | |
e9dab196 | 1448 | |
d550d98d | 1449 | return; |
1da177e4 LT |
1450 | } |
1451 | ||
8ab58e8e LT |
1452 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1453 | u32 event) | |
1454 | { | |
1455 | if (!brightness_switch_enabled) | |
1456 | return; | |
1457 | ||
1458 | video_device->switch_brightness_event = event; | |
1459 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1460 | } | |
1461 | ||
4be44fcd | 1462 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1463 | { |
50dd0969 | 1464 | struct acpi_video_device *video_device = data; |
4be44fcd | 1465 | struct acpi_device *device = NULL; |
e9dab196 LY |
1466 | struct acpi_video_bus *bus; |
1467 | struct input_dev *input; | |
17c452f9 | 1468 | int keycode = 0; |
1da177e4 | 1469 | |
1da177e4 | 1470 | if (!video_device) |
d550d98d | 1471 | return; |
1da177e4 | 1472 | |
e6afa0de | 1473 | device = video_device->dev; |
e9dab196 LY |
1474 | bus = video_device->video; |
1475 | input = bus->input; | |
1da177e4 LT |
1476 | |
1477 | switch (event) { | |
4be44fcd | 1478 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1479 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1480 | keycode = KEY_BRIGHTNESS_CYCLE; |
1481 | break; | |
4be44fcd | 1482 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1483 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1484 | keycode = KEY_BRIGHTNESSUP; |
1485 | break; | |
4be44fcd | 1486 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1487 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1488 | keycode = KEY_BRIGHTNESSDOWN; |
1489 | break; | |
70f23fd6 | 1490 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1491 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1492 | keycode = KEY_BRIGHTNESS_ZERO; |
1493 | break; | |
4be44fcd | 1494 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1495 | brightness_switch_event(video_device, event); |
e9dab196 | 1496 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1497 | break; |
1498 | default: | |
1499 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1500 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1501 | break; |
1502 | } | |
e9dab196 | 1503 | |
7761f638 | 1504 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1505 | |
1506 | if (keycode) { | |
1507 | input_report_key(input, keycode, 1); | |
1508 | input_sync(input); | |
1509 | input_report_key(input, keycode, 0); | |
1510 | input_sync(input); | |
1511 | } | |
e9dab196 | 1512 | |
d550d98d | 1513 | return; |
1da177e4 LT |
1514 | } |
1515 | ||
ac7729da RW |
1516 | static int acpi_video_resume(struct notifier_block *nb, |
1517 | unsigned long val, void *ign) | |
863c1490 MG |
1518 | { |
1519 | struct acpi_video_bus *video; | |
1520 | struct acpi_video_device *video_device; | |
1521 | int i; | |
1522 | ||
ac7729da RW |
1523 | switch (val) { |
1524 | case PM_HIBERNATION_PREPARE: | |
1525 | case PM_SUSPEND_PREPARE: | |
1526 | case PM_RESTORE_PREPARE: | |
1527 | return NOTIFY_DONE; | |
1528 | } | |
863c1490 | 1529 | |
ac7729da RW |
1530 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1531 | ||
1532 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1533 | |
1534 | for (i = 0; i < video->attached_count; i++) { | |
1535 | video_device = video->attached_array[i].bind_info; | |
654a182d HG |
1536 | if (video_device && video_device->brightness) |
1537 | acpi_video_device_lcd_set_level(video_device, | |
1538 | video_device->brightness->curr); | |
863c1490 | 1539 | } |
ac7729da RW |
1540 | |
1541 | return NOTIFY_OK; | |
863c1490 MG |
1542 | } |
1543 | ||
c504f8cb ZR |
1544 | static acpi_status |
1545 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1546 | void **return_value) | |
1547 | { | |
1548 | struct acpi_device *device = context; | |
1549 | struct acpi_device *sibling; | |
1550 | int result; | |
1551 | ||
1552 | if (handle == device->handle) | |
1553 | return AE_CTRL_TERMINATE; | |
1554 | ||
1555 | result = acpi_bus_get_device(handle, &sibling); | |
1556 | if (result) | |
1557 | return AE_OK; | |
1558 | ||
1559 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1560 | return AE_ALREADY_EXISTS; | |
1561 | ||
1562 | return AE_OK; | |
1563 | } | |
1564 | ||
67b662e1 AL |
1565 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1566 | { | |
99678ed7 HG |
1567 | struct backlight_properties props; |
1568 | struct pci_dev *pdev; | |
1569 | acpi_handle acpi_parent; | |
1570 | struct device *parent = NULL; | |
1571 | int result; | |
1572 | static int count; | |
1573 | char *name; | |
67b662e1 | 1574 | |
0b8db271 AL |
1575 | /* |
1576 | * Do not create backlight device for video output | |
1577 | * device that is not in the enumerated list. | |
1578 | */ | |
1579 | if (!acpi_video_device_in_dod(device)) { | |
1580 | dev_dbg(&device->dev->dev, "not in _DOD list, ignore\n"); | |
1581 | return; | |
1582 | } | |
1583 | ||
99678ed7 HG |
1584 | result = acpi_video_init_brightness(device); |
1585 | if (result) | |
1586 | return; | |
654a182d HG |
1587 | |
1588 | if (disable_backlight_sysfs_if > 0) | |
1589 | return; | |
1590 | ||
99678ed7 HG |
1591 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
1592 | if (!name) | |
1593 | return; | |
1594 | count++; | |
67b662e1 | 1595 | |
99678ed7 | 1596 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1597 | |
99678ed7 HG |
1598 | pdev = acpi_get_pci_dev(acpi_parent); |
1599 | if (pdev) { | |
1600 | parent = &pdev->dev; | |
1601 | pci_dev_put(pdev); | |
1602 | } | |
67b662e1 | 1603 | |
99678ed7 HG |
1604 | memset(&props, 0, sizeof(struct backlight_properties)); |
1605 | props.type = BACKLIGHT_FIRMWARE; | |
1606 | props.max_brightness = device->brightness->count - 3; | |
1607 | device->backlight = backlight_device_register(name, | |
1608 | parent, | |
1609 | device, | |
1610 | &acpi_backlight_ops, | |
1611 | &props); | |
1612 | kfree(name); | |
654a182d HG |
1613 | if (IS_ERR(device->backlight)) { |
1614 | device->backlight = NULL; | |
99678ed7 | 1615 | return; |
654a182d | 1616 | } |
67b662e1 | 1617 | |
99678ed7 HG |
1618 | /* |
1619 | * Save current brightness level in case we have to restore it | |
1620 | * before acpi_video_device_lcd_set_level() is called next time. | |
1621 | */ | |
1622 | device->backlight->props.brightness = | |
1623 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1624 | |
99678ed7 HG |
1625 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1626 | device->dev, &video_cooling_ops); | |
1627 | if (IS_ERR(device->cooling_dev)) { | |
1628 | /* | |
1629 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1630 | * Also, why the hell we are returning early and not attempt to | |
1631 | * register video output if cooling device registration failed? | |
1632 | * -- dtor | |
1633 | */ | |
1634 | device->cooling_dev = NULL; | |
1635 | return; | |
67b662e1 | 1636 | } |
99678ed7 HG |
1637 | |
1638 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1639 | device->cooling_dev->id); | |
1640 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1641 | &device->cooling_dev->device.kobj, | |
1642 | "thermal_cooling"); | |
1643 | if (result) | |
1644 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1645 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1646 | &device->dev->dev.kobj, "device"); | |
1647 | if (result) | |
1648 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1649 | } |
1650 | ||
dce4ec2e AL |
1651 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1652 | { | |
1653 | struct acpi_video_device *dev; | |
1654 | union acpi_object *levels; | |
1655 | ||
1656 | mutex_lock(&video->device_list_lock); | |
1657 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
1658 | if (!acpi_video_device_lcd_query_levels(dev, &levels)) | |
1659 | kfree(levels); | |
1660 | } | |
1661 | mutex_unlock(&video->device_list_lock); | |
1662 | } | |
1663 | ||
67b662e1 AL |
1664 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1665 | { | |
1666 | struct acpi_video_device *dev; | |
1667 | ||
53a92ba7 HG |
1668 | if (video->backlight_registered) |
1669 | return 0; | |
1670 | ||
dce4ec2e AL |
1671 | acpi_video_run_bcl_for_osi(video); |
1672 | ||
3bd6bce3 | 1673 | if (acpi_video_get_backlight_type() != acpi_backlight_video) |
99678ed7 HG |
1674 | return 0; |
1675 | ||
67b662e1 AL |
1676 | mutex_lock(&video->device_list_lock); |
1677 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1678 | acpi_video_dev_register_backlight(dev); | |
1679 | mutex_unlock(&video->device_list_lock); | |
1680 | ||
99678ed7 HG |
1681 | video->backlight_registered = true; |
1682 | ||
67b662e1 AL |
1683 | video->pm_nb.notifier_call = acpi_video_resume; |
1684 | video->pm_nb.priority = 0; | |
1685 | return register_pm_notifier(&video->pm_nb); | |
1686 | } | |
1687 | ||
1688 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1689 | { | |
1690 | if (device->backlight) { | |
1691 | backlight_device_unregister(device->backlight); | |
1692 | device->backlight = NULL; | |
1693 | } | |
1694 | if (device->brightness) { | |
1695 | kfree(device->brightness->levels); | |
1696 | kfree(device->brightness); | |
1697 | device->brightness = NULL; | |
1698 | } | |
1699 | if (device->cooling_dev) { | |
1700 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1701 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1702 | thermal_cooling_device_unregister(device->cooling_dev); | |
1703 | device->cooling_dev = NULL; | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1708 | { | |
1709 | struct acpi_video_device *dev; | |
99678ed7 HG |
1710 | int error; |
1711 | ||
1712 | if (!video->backlight_registered) | |
1713 | return 0; | |
1714 | ||
1715 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1716 | |
1717 | mutex_lock(&video->device_list_lock); | |
1718 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1719 | acpi_video_dev_unregister_backlight(dev); | |
1720 | mutex_unlock(&video->device_list_lock); | |
1721 | ||
99678ed7 HG |
1722 | video->backlight_registered = false; |
1723 | ||
67b662e1 AL |
1724 | return error; |
1725 | } | |
1726 | ||
1727 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1728 | { | |
1729 | acpi_status status; | |
1730 | struct acpi_device *adev = device->dev; | |
1731 | ||
1732 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1733 | acpi_video_device_notify, device); | |
1734 | if (ACPI_FAILURE(status)) | |
1735 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1736 | else | |
1737 | device->flags.notify = 1; | |
1738 | } | |
1739 | ||
1740 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1741 | { | |
1742 | struct input_dev *input; | |
1743 | struct acpi_video_device *dev; | |
1744 | int error; | |
1745 | ||
1746 | video->input = input = input_allocate_device(); | |
1747 | if (!input) { | |
1748 | error = -ENOMEM; | |
1749 | goto out; | |
1750 | } | |
1751 | ||
1752 | error = acpi_video_bus_start_devices(video); | |
1753 | if (error) | |
1754 | goto err_free_input; | |
1755 | ||
1756 | snprintf(video->phys, sizeof(video->phys), | |
1757 | "%s/video/input0", acpi_device_hid(video->device)); | |
1758 | ||
1759 | input->name = acpi_device_name(video->device); | |
1760 | input->phys = video->phys; | |
1761 | input->id.bustype = BUS_HOST; | |
1762 | input->id.product = 0x06; | |
1763 | input->dev.parent = &video->device->dev; | |
1764 | input->evbit[0] = BIT(EV_KEY); | |
1765 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1766 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1767 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1768 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1769 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1770 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1771 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1772 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1773 | ||
1774 | error = input_register_device(input); | |
1775 | if (error) | |
1776 | goto err_stop_dev; | |
1777 | ||
1778 | mutex_lock(&video->device_list_lock); | |
1779 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1780 | acpi_video_dev_add_notify_handler(dev); | |
1781 | mutex_unlock(&video->device_list_lock); | |
1782 | ||
1783 | return 0; | |
1784 | ||
1785 | err_stop_dev: | |
1786 | acpi_video_bus_stop_devices(video); | |
1787 | err_free_input: | |
1788 | input_free_device(input); | |
1789 | video->input = NULL; | |
1790 | out: | |
1791 | return error; | |
1792 | } | |
1793 | ||
1794 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1795 | { | |
1796 | if (dev->flags.notify) { | |
1797 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1798 | acpi_video_device_notify); | |
1799 | dev->flags.notify = 0; | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1804 | { | |
1805 | struct acpi_video_device *dev; | |
1806 | ||
1807 | mutex_lock(&video->device_list_lock); | |
1808 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1809 | acpi_video_dev_remove_notify_handler(dev); | |
1810 | mutex_unlock(&video->device_list_lock); | |
1811 | ||
1812 | acpi_video_bus_stop_devices(video); | |
1813 | input_unregister_device(video->input); | |
1814 | video->input = NULL; | |
1815 | } | |
1816 | ||
1817 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1818 | { | |
1819 | struct acpi_video_device *dev, *next; | |
1820 | ||
1821 | mutex_lock(&video->device_list_lock); | |
1822 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1823 | list_del(&dev->entry); | |
1824 | kfree(dev); | |
1825 | } | |
1826 | mutex_unlock(&video->device_list_lock); | |
1827 | ||
1828 | return 0; | |
1829 | } | |
1830 | ||
ac7729da RW |
1831 | static int instance; |
1832 | ||
4be44fcd | 1833 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1834 | { |
f51e8391 | 1835 | struct acpi_video_bus *video; |
f51e8391 | 1836 | int error; |
c504f8cb ZR |
1837 | acpi_status status; |
1838 | ||
1839 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1840 | device->parent->handle, 1, | |
1841 | acpi_video_bus_match, NULL, | |
1842 | device, NULL); | |
1843 | if (status == AE_ALREADY_EXISTS) { | |
1844 | printk(KERN_WARNING FW_BUG | |
1845 | "Duplicate ACPI video bus devices for the" | |
1846 | " same VGA controller, please try module " | |
1847 | "parameter \"video.allow_duplicates=1\"" | |
1848 | "if the current driver doesn't work.\n"); | |
1849 | if (!allow_duplicates) | |
1850 | return -ENODEV; | |
1851 | } | |
1da177e4 | 1852 | |
36bcbec7 | 1853 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1854 | if (!video) |
d550d98d | 1855 | return -ENOMEM; |
1da177e4 | 1856 | |
e6d9da1d ZR |
1857 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1858 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1859 | if (instance) | |
1860 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1861 | instance++; |
e6d9da1d | 1862 | } |
f3b39f13 ZY |
1863 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1864 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1865 | if (instance) | |
1866 | device->pnp.bus_id[3] = '0' + instance; | |
1867 | instance++; | |
1868 | } | |
e6d9da1d | 1869 | |
e6afa0de | 1870 | video->device = device; |
1da177e4 LT |
1871 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1872 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1873 | device->driver_data = video; |
1da177e4 LT |
1874 | |
1875 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1876 | error = acpi_video_bus_check(video); |
1877 | if (error) | |
1878 | goto err_free_video; | |
1da177e4 | 1879 | |
bbac81f5 | 1880 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1881 | INIT_LIST_HEAD(&video->video_device_list); |
1882 | ||
ea9f8856 IM |
1883 | error = acpi_video_bus_get_devices(video, device); |
1884 | if (error) | |
91e13aa3 | 1885 | goto err_put_video; |
1da177e4 | 1886 | |
1da177e4 | 1887 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1888 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1889 | video->flags.multihead ? "yes" : "no", | |
1890 | video->flags.rom ? "yes" : "no", | |
1891 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1892 | mutex_lock(&video_list_lock); |
1893 | list_add_tail(&video->entry, &video_bus_head); | |
1894 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1895 | |
67b662e1 AL |
1896 | acpi_video_bus_register_backlight(video); |
1897 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1898 | |
f51e8391 DT |
1899 | return 0; |
1900 | ||
67b662e1 | 1901 | err_put_video: |
f51e8391 DT |
1902 | acpi_video_bus_put_devices(video); |
1903 | kfree(video->attached_array); | |
67b662e1 | 1904 | err_free_video: |
f51e8391 | 1905 | kfree(video); |
db89b4f0 | 1906 | device->driver_data = NULL; |
1da177e4 | 1907 | |
f51e8391 | 1908 | return error; |
1da177e4 LT |
1909 | } |
1910 | ||
51fac838 | 1911 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1912 | { |
4be44fcd | 1913 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1914 | |
1da177e4 LT |
1915 | |
1916 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1917 | return -EINVAL; |
1da177e4 | 1918 | |
50dd0969 | 1919 | video = acpi_driver_data(device); |
1da177e4 | 1920 | |
67b662e1 AL |
1921 | acpi_video_bus_remove_notify_handler(video); |
1922 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1923 | acpi_video_bus_put_devices(video); |
1da177e4 | 1924 | |
67b662e1 AL |
1925 | mutex_lock(&video_list_lock); |
1926 | list_del(&video->entry); | |
1927 | mutex_unlock(&video_list_lock); | |
1928 | ||
6044ec88 | 1929 | kfree(video->attached_array); |
1da177e4 LT |
1930 | kfree(video); |
1931 | ||
d550d98d | 1932 | return 0; |
1da177e4 LT |
1933 | } |
1934 | ||
c6996bdd AC |
1935 | static int __init is_i740(struct pci_dev *dev) |
1936 | { | |
1937 | if (dev->device == 0x00D1) | |
1938 | return 1; | |
1939 | if (dev->device == 0x7000) | |
1940 | return 1; | |
1941 | return 0; | |
1942 | } | |
1943 | ||
74a365b3 MG |
1944 | static int __init intel_opregion_present(void) |
1945 | { | |
c6996bdd | 1946 | int opregion = 0; |
74a365b3 MG |
1947 | struct pci_dev *dev = NULL; |
1948 | u32 address; | |
1949 | ||
1950 | for_each_pci_dev(dev) { | |
1951 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1952 | continue; | |
1953 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1954 | continue; | |
c6996bdd AC |
1955 | /* We don't want to poke around undefined i740 registers */ |
1956 | if (is_i740(dev)) | |
1957 | continue; | |
74a365b3 MG |
1958 | pci_read_config_dword(dev, 0xfc, &address); |
1959 | if (!address) | |
1960 | continue; | |
c6996bdd | 1961 | opregion = 1; |
74a365b3 | 1962 | } |
c6996bdd | 1963 | return opregion; |
74a365b3 MG |
1964 | } |
1965 | ||
8e5c2b77 | 1966 | int acpi_video_register(void) |
1da177e4 | 1967 | { |
2a8b18e9 | 1968 | int ret = 0; |
28d63403 | 1969 | |
2a8b18e9 | 1970 | mutex_lock(®ister_count_mutex); |
86e437f0 ZY |
1971 | if (register_count) { |
1972 | /* | |
8e5c2b77 RW |
1973 | * if the function of acpi_video_register is already called, |
1974 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 | 1975 | */ |
2a8b18e9 | 1976 | goto leave; |
86e437f0 | 1977 | } |
1da177e4 | 1978 | |
67b662e1 AL |
1979 | mutex_init(&video_list_lock); |
1980 | INIT_LIST_HEAD(&video_bus_head); | |
1981 | ||
7ee33baa HG |
1982 | dmi_check_system(video_dmi_table); |
1983 | ||
28d63403 CW |
1984 | ret = acpi_bus_register_driver(&acpi_video_bus); |
1985 | if (ret) | |
2a8b18e9 | 1986 | goto leave; |
1da177e4 | 1987 | |
86e437f0 ZY |
1988 | /* |
1989 | * When the acpi_video_bus is loaded successfully, increase | |
1990 | * the counter reference. | |
1991 | */ | |
1992 | register_count = 1; | |
1993 | ||
2a8b18e9 HG |
1994 | leave: |
1995 | mutex_unlock(®ister_count_mutex); | |
1996 | return ret; | |
1da177e4 | 1997 | } |
8e5c2b77 | 1998 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 1999 | |
86e437f0 ZY |
2000 | void acpi_video_unregister(void) |
2001 | { | |
2a8b18e9 HG |
2002 | mutex_lock(®ister_count_mutex); |
2003 | if (register_count) { | |
2004 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2005 | register_count = 0; | |
86e437f0 | 2006 | } |
2a8b18e9 | 2007 | mutex_unlock(®ister_count_mutex); |
86e437f0 ZY |
2008 | } |
2009 | EXPORT_SYMBOL(acpi_video_unregister); | |
2010 | ||
1b7f37e1 HG |
2011 | void acpi_video_unregister_backlight(void) |
2012 | { | |
2013 | struct acpi_video_bus *video; | |
2014 | ||
2a8b18e9 HG |
2015 | mutex_lock(®ister_count_mutex); |
2016 | if (register_count) { | |
2017 | mutex_lock(&video_list_lock); | |
2018 | list_for_each_entry(video, &video_bus_head, entry) | |
2019 | acpi_video_bus_unregister_backlight(video); | |
2020 | mutex_unlock(&video_list_lock); | |
2021 | } | |
2022 | mutex_unlock(®ister_count_mutex); | |
1b7f37e1 | 2023 | } |
1b7f37e1 | 2024 | |
74a365b3 MG |
2025 | /* |
2026 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2027 | * the video opregion code to be run first in order to initialise | |
2028 | * state before any ACPI video calls are made. To handle this we defer | |
2029 | * registration of the video class until the opregion code has run. | |
2030 | */ | |
2031 | ||
2032 | static int __init acpi_video_init(void) | |
2033 | { | |
6e17cb12 CW |
2034 | /* |
2035 | * Let the module load even if ACPI is disabled (e.g. due to | |
2036 | * a broken BIOS) so that i915.ko can still be loaded on such | |
2037 | * old systems without an AcpiOpRegion. | |
2038 | * | |
2039 | * acpi_video_register() will report -ENODEV later as well due | |
2040 | * to acpi_disabled when i915.ko tries to register itself afterwards. | |
2041 | */ | |
2042 | if (acpi_disabled) | |
2043 | return 0; | |
2044 | ||
74a365b3 MG |
2045 | if (intel_opregion_present()) |
2046 | return 0; | |
2047 | ||
2048 | return acpi_video_register(); | |
2049 | } | |
1da177e4 | 2050 | |
86e437f0 | 2051 | static void __exit acpi_video_exit(void) |
1da177e4 | 2052 | { |
93a291df | 2053 | acpi_video_detect_exit(); |
86e437f0 | 2054 | acpi_video_unregister(); |
1da177e4 | 2055 | |
d550d98d | 2056 | return; |
1da177e4 LT |
2057 | } |
2058 | ||
2059 | module_init(acpi_video_init); | |
2060 | module_exit(acpi_video_exit); |