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1da177e4 LT |
1 | /* |
2 | * video.c - ACPI Video Driver ($Revision:$) | |
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> |
1da177e4 LT |
33 | #include <linux/proc_fs.h> |
34 | #include <linux/seq_file.h> | |
e9dab196 | 35 | #include <linux/input.h> |
2f3d000a | 36 | #include <linux/backlight.h> |
702ed512 | 37 | #include <linux/thermal.h> |
23b0f015 | 38 | #include <linux/video_output.h> |
935e5f29 | 39 | #include <linux/sort.h> |
74a365b3 MG |
40 | #include <linux/pci.h> |
41 | #include <linux/pci_ids.h> | |
1da177e4 | 42 | #include <asm/uaccess.h> |
eb27cae8 | 43 | #include <linux/dmi.h> |
1da177e4 LT |
44 | #include <acpi/acpi_bus.h> |
45 | #include <acpi/acpi_drivers.h> | |
46 | ||
a192a958 LB |
47 | #define PREFIX "ACPI: " |
48 | ||
1da177e4 | 49 | #define ACPI_VIDEO_CLASS "video" |
1da177e4 LT |
50 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
51 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
52 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
53 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
54 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
55 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
56 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
57 | ||
f4715189 TT |
58 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
59 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
60 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
61 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
62 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 63 | |
2f3d000a | 64 | #define MAX_NAME_LEN 20 |
1da177e4 | 65 | |
82cae999 RZ |
66 | #define ACPI_VIDEO_DISPLAY_CRT 1 |
67 | #define ACPI_VIDEO_DISPLAY_TV 2 | |
68 | #define ACPI_VIDEO_DISPLAY_DVI 3 | |
69 | #define ACPI_VIDEO_DISPLAY_LCD 4 | |
70 | ||
1da177e4 | 71 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 72 | ACPI_MODULE_NAME("video"); |
1da177e4 | 73 | |
f52fd66d | 74 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 75 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
76 | MODULE_LICENSE("GPL"); |
77 | ||
8a681a4d ZR |
78 | static int brightness_switch_enabled = 1; |
79 | module_param(brightness_switch_enabled, bool, 0644); | |
80 | ||
86e437f0 | 81 | static int register_count = 0; |
4be44fcd LB |
82 | static int acpi_video_bus_add(struct acpi_device *device); |
83 | static int acpi_video_bus_remove(struct acpi_device *device, int type); | |
863c1490 | 84 | static int acpi_video_resume(struct acpi_device *device); |
7015558f | 85 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 86 | |
1ba90e3a TR |
87 | static const struct acpi_device_id video_device_ids[] = { |
88 | {ACPI_VIDEO_HID, 0}, | |
89 | {"", 0}, | |
90 | }; | |
91 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
92 | ||
1da177e4 | 93 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 94 | .name = "video", |
1da177e4 | 95 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 96 | .ids = video_device_ids, |
1da177e4 LT |
97 | .ops = { |
98 | .add = acpi_video_bus_add, | |
99 | .remove = acpi_video_bus_remove, | |
863c1490 | 100 | .resume = acpi_video_resume, |
7015558f | 101 | .notify = acpi_video_bus_notify, |
4be44fcd | 102 | }, |
1da177e4 LT |
103 | }; |
104 | ||
105 | struct acpi_video_bus_flags { | |
4be44fcd LB |
106 | u8 multihead:1; /* can switch video heads */ |
107 | u8 rom:1; /* can retrieve a video rom */ | |
108 | u8 post:1; /* can configure the head to */ | |
109 | u8 reserved:5; | |
1da177e4 LT |
110 | }; |
111 | ||
112 | struct acpi_video_bus_cap { | |
4be44fcd LB |
113 | u8 _DOS:1; /*Enable/Disable output switching */ |
114 | u8 _DOD:1; /*Enumerate all devices attached to display adapter */ | |
115 | u8 _ROM:1; /*Get ROM Data */ | |
116 | u8 _GPD:1; /*Get POST Device */ | |
117 | u8 _SPD:1; /*Set POST Device */ | |
118 | u8 _VPO:1; /*Video POST Options */ | |
119 | u8 reserved:2; | |
1da177e4 LT |
120 | }; |
121 | ||
4be44fcd LB |
122 | struct acpi_video_device_attrib { |
123 | u32 display_index:4; /* A zero-based instance of the Display */ | |
98fb8fe1 | 124 | u32 display_port_attachment:4; /*This field differentiates the display type */ |
4be44fcd | 125 | u32 display_type:4; /*Describe the specific type in use */ |
98fb8fe1 | 126 | u32 vendor_specific:4; /*Chipset Vendor Specific */ |
4be44fcd LB |
127 | u32 bios_can_detect:1; /*BIOS can detect the device */ |
128 | u32 depend_on_vga:1; /*Non-VGA output device whose power is related to | |
129 | the VGA device. */ | |
130 | u32 pipe_id:3; /*For VGA multiple-head devices. */ | |
131 | u32 reserved:10; /*Must be 0 */ | |
132 | u32 device_id_scheme:1; /*Device ID Scheme */ | |
1da177e4 LT |
133 | }; |
134 | ||
135 | struct acpi_video_enumerated_device { | |
136 | union { | |
137 | u32 int_val; | |
4be44fcd | 138 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
139 | } value; |
140 | struct acpi_video_device *bind_info; | |
141 | }; | |
142 | ||
143 | struct acpi_video_bus { | |
e6afa0de | 144 | struct acpi_device *device; |
4be44fcd | 145 | u8 dos_setting; |
1da177e4 | 146 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
147 | u8 attached_count; |
148 | struct acpi_video_bus_cap cap; | |
1da177e4 | 149 | struct acpi_video_bus_flags flags; |
4be44fcd | 150 | struct list_head video_device_list; |
bbac81f5 | 151 | struct mutex device_list_lock; /* protects video_device_list */ |
4be44fcd | 152 | struct proc_dir_entry *dir; |
e9dab196 LY |
153 | struct input_dev *input; |
154 | char phys[32]; /* for input device */ | |
1da177e4 LT |
155 | }; |
156 | ||
157 | struct acpi_video_device_flags { | |
4be44fcd LB |
158 | u8 crt:1; |
159 | u8 lcd:1; | |
160 | u8 tvout:1; | |
82cae999 | 161 | u8 dvi:1; |
4be44fcd LB |
162 | u8 bios:1; |
163 | u8 unknown:1; | |
82cae999 | 164 | u8 reserved:2; |
1da177e4 LT |
165 | }; |
166 | ||
167 | struct acpi_video_device_cap { | |
4be44fcd LB |
168 | u8 _ADR:1; /*Return the unique ID */ |
169 | u8 _BCL:1; /*Query list of brightness control levels supported */ | |
170 | u8 _BCM:1; /*Set the brightness level */ | |
2f3d000a | 171 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 172 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
4be44fcd LB |
173 | u8 _DDC:1; /*Return the EDID for this device */ |
174 | u8 _DCS:1; /*Return status of output device */ | |
175 | u8 _DGS:1; /*Query graphics state */ | |
176 | u8 _DSS:1; /*Device state set */ | |
1da177e4 LT |
177 | }; |
178 | ||
d32f6947 ZR |
179 | struct acpi_video_brightness_flags { |
180 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
d80fb99f | 181 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/ |
1a7c618a ZR |
182 | u8 _BCL_use_index:1; /* levels in _BCL are index values */ |
183 | u8 _BCM_use_index:1; /* input of _BCM is an index value */ | |
184 | u8 _BQC_use_index:1; /* _BQC returns an index value */ | |
d32f6947 ZR |
185 | }; |
186 | ||
1da177e4 | 187 | struct acpi_video_device_brightness { |
4be44fcd LB |
188 | int curr; |
189 | int count; | |
190 | int *levels; | |
d32f6947 | 191 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
192 | }; |
193 | ||
194 | struct acpi_video_device { | |
4be44fcd LB |
195 | unsigned long device_id; |
196 | struct acpi_video_device_flags flags; | |
197 | struct acpi_video_device_cap cap; | |
198 | struct list_head entry; | |
199 | struct acpi_video_bus *video; | |
200 | struct acpi_device *dev; | |
1da177e4 | 201 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 202 | struct backlight_device *backlight; |
4a703a8f | 203 | struct thermal_cooling_device *cooling_dev; |
23b0f015 | 204 | struct output_device *output_dev; |
1da177e4 LT |
205 | }; |
206 | ||
1da177e4 LT |
207 | /* bus */ |
208 | static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file); | |
070d8eb1 | 209 | static const struct file_operations acpi_video_bus_info_fops = { |
cf7acfab | 210 | .owner = THIS_MODULE, |
4be44fcd LB |
211 | .open = acpi_video_bus_info_open_fs, |
212 | .read = seq_read, | |
213 | .llseek = seq_lseek, | |
214 | .release = single_release, | |
1da177e4 LT |
215 | }; |
216 | ||
217 | static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file); | |
070d8eb1 | 218 | static const struct file_operations acpi_video_bus_ROM_fops = { |
cf7acfab | 219 | .owner = THIS_MODULE, |
4be44fcd LB |
220 | .open = acpi_video_bus_ROM_open_fs, |
221 | .read = seq_read, | |
222 | .llseek = seq_lseek, | |
223 | .release = single_release, | |
1da177e4 LT |
224 | }; |
225 | ||
4be44fcd LB |
226 | static int acpi_video_bus_POST_info_open_fs(struct inode *inode, |
227 | struct file *file); | |
070d8eb1 | 228 | static const struct file_operations acpi_video_bus_POST_info_fops = { |
cf7acfab | 229 | .owner = THIS_MODULE, |
4be44fcd LB |
230 | .open = acpi_video_bus_POST_info_open_fs, |
231 | .read = seq_read, | |
232 | .llseek = seq_lseek, | |
233 | .release = single_release, | |
1da177e4 LT |
234 | }; |
235 | ||
236 | static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file); | |
c07c9a78 | 237 | static ssize_t acpi_video_bus_write_POST(struct file *file, |
b7171ae7 JE |
238 | const char __user *buffer, size_t count, loff_t *data); |
239 | static const struct file_operations acpi_video_bus_POST_fops = { | |
cf7acfab | 240 | .owner = THIS_MODULE, |
4be44fcd LB |
241 | .open = acpi_video_bus_POST_open_fs, |
242 | .read = seq_read, | |
b7171ae7 | 243 | .write = acpi_video_bus_write_POST, |
4be44fcd LB |
244 | .llseek = seq_lseek, |
245 | .release = single_release, | |
1da177e4 LT |
246 | }; |
247 | ||
1da177e4 | 248 | static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file); |
c07c9a78 | 249 | static ssize_t acpi_video_bus_write_DOS(struct file *file, |
b7171ae7 JE |
250 | const char __user *buffer, size_t count, loff_t *data); |
251 | static const struct file_operations acpi_video_bus_DOS_fops = { | |
cf7acfab | 252 | .owner = THIS_MODULE, |
4be44fcd LB |
253 | .open = acpi_video_bus_DOS_open_fs, |
254 | .read = seq_read, | |
b7171ae7 | 255 | .write = acpi_video_bus_write_DOS, |
4be44fcd LB |
256 | .llseek = seq_lseek, |
257 | .release = single_release, | |
1da177e4 LT |
258 | }; |
259 | ||
260 | /* device */ | |
4be44fcd LB |
261 | static int acpi_video_device_info_open_fs(struct inode *inode, |
262 | struct file *file); | |
070d8eb1 | 263 | static const struct file_operations acpi_video_device_info_fops = { |
cf7acfab | 264 | .owner = THIS_MODULE, |
4be44fcd LB |
265 | .open = acpi_video_device_info_open_fs, |
266 | .read = seq_read, | |
267 | .llseek = seq_lseek, | |
268 | .release = single_release, | |
1da177e4 LT |
269 | }; |
270 | ||
4be44fcd LB |
271 | static int acpi_video_device_state_open_fs(struct inode *inode, |
272 | struct file *file); | |
c07c9a78 | 273 | static ssize_t acpi_video_device_write_state(struct file *file, |
b7171ae7 JE |
274 | const char __user *buffer, size_t count, loff_t *data); |
275 | static const struct file_operations acpi_video_device_state_fops = { | |
cf7acfab | 276 | .owner = THIS_MODULE, |
4be44fcd LB |
277 | .open = acpi_video_device_state_open_fs, |
278 | .read = seq_read, | |
b7171ae7 | 279 | .write = acpi_video_device_write_state, |
4be44fcd LB |
280 | .llseek = seq_lseek, |
281 | .release = single_release, | |
1da177e4 LT |
282 | }; |
283 | ||
4be44fcd LB |
284 | static int acpi_video_device_brightness_open_fs(struct inode *inode, |
285 | struct file *file); | |
c07c9a78 | 286 | static ssize_t acpi_video_device_write_brightness(struct file *file, |
b7171ae7 | 287 | const char __user *buffer, size_t count, loff_t *data); |
828c0950 | 288 | static const struct file_operations acpi_video_device_brightness_fops = { |
cf7acfab | 289 | .owner = THIS_MODULE, |
4be44fcd LB |
290 | .open = acpi_video_device_brightness_open_fs, |
291 | .read = seq_read, | |
b7171ae7 | 292 | .write = acpi_video_device_write_brightness, |
4be44fcd LB |
293 | .llseek = seq_lseek, |
294 | .release = single_release, | |
1da177e4 LT |
295 | }; |
296 | ||
4be44fcd LB |
297 | static int acpi_video_device_EDID_open_fs(struct inode *inode, |
298 | struct file *file); | |
070d8eb1 | 299 | static const struct file_operations acpi_video_device_EDID_fops = { |
cf7acfab | 300 | .owner = THIS_MODULE, |
4be44fcd LB |
301 | .open = acpi_video_device_EDID_open_fs, |
302 | .read = seq_read, | |
303 | .llseek = seq_lseek, | |
304 | .release = single_release, | |
1da177e4 LT |
305 | }; |
306 | ||
b7171ae7 | 307 | static const char device_decode[][30] = { |
1da177e4 LT |
308 | "motherboard VGA device", |
309 | "PCI VGA device", | |
310 | "AGP VGA device", | |
311 | "UNKNOWN", | |
312 | }; | |
313 | ||
4be44fcd LB |
314 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
315 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
316 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
317 | struct acpi_video_device *device); | |
1da177e4 | 318 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
319 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
320 | int level); | |
321 | static int acpi_video_device_lcd_get_level_current( | |
322 | struct acpi_video_device *device, | |
27663c58 | 323 | unsigned long long *level); |
4be44fcd LB |
324 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
325 | u32 level_current, u32 event); | |
c8890f90 | 326 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 327 | int event); |
23b0f015 | 328 | static int acpi_video_device_get_state(struct acpi_video_device *device, |
27663c58 | 329 | unsigned long long *state); |
23b0f015 LY |
330 | static int acpi_video_output_get(struct output_device *od); |
331 | static int acpi_video_device_set_state(struct acpi_video_device *device, int state); | |
1da177e4 | 332 | |
2f3d000a YL |
333 | /*backlight device sysfs support*/ |
334 | static int acpi_video_get_brightness(struct backlight_device *bd) | |
335 | { | |
27663c58 | 336 | unsigned long long cur_level; |
38531e6f | 337 | int i; |
2f3d000a | 338 | struct acpi_video_device *vd = |
655bfd7a | 339 | (struct acpi_video_device *)bl_get_data(bd); |
c8890f90 ZR |
340 | |
341 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level)) | |
342 | return -EINVAL; | |
38531e6f MG |
343 | for (i = 2; i < vd->brightness->count; i++) { |
344 | if (vd->brightness->levels[i] == cur_level) | |
345 | /* The first two entries are special - see page 575 | |
346 | of the ACPI spec 3.0 */ | |
347 | return i-2; | |
348 | } | |
349 | return 0; | |
2f3d000a YL |
350 | } |
351 | ||
352 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
353 | { | |
24450c7a | 354 | int request_level = bd->props.brightness + 2; |
2f3d000a | 355 | struct acpi_video_device *vd = |
655bfd7a | 356 | (struct acpi_video_device *)bl_get_data(bd); |
24450c7a ZR |
357 | |
358 | return acpi_video_device_lcd_set_level(vd, | |
359 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
360 | } |
361 | ||
599a52d1 RP |
362 | static struct backlight_ops acpi_backlight_ops = { |
363 | .get_brightness = acpi_video_get_brightness, | |
364 | .update_status = acpi_video_set_brightness, | |
365 | }; | |
366 | ||
23b0f015 LY |
367 | /*video output device sysfs support*/ |
368 | static int acpi_video_output_get(struct output_device *od) | |
369 | { | |
27663c58 | 370 | unsigned long long state; |
23b0f015 | 371 | struct acpi_video_device *vd = |
60043428 | 372 | (struct acpi_video_device *)dev_get_drvdata(&od->dev); |
23b0f015 LY |
373 | acpi_video_device_get_state(vd, &state); |
374 | return (int)state; | |
375 | } | |
376 | ||
377 | static int acpi_video_output_set(struct output_device *od) | |
378 | { | |
379 | unsigned long state = od->request_state; | |
380 | struct acpi_video_device *vd= | |
60043428 | 381 | (struct acpi_video_device *)dev_get_drvdata(&od->dev); |
23b0f015 LY |
382 | return acpi_video_device_set_state(vd, state); |
383 | } | |
384 | ||
385 | static struct output_properties acpi_output_properties = { | |
386 | .set_state = acpi_video_output_set, | |
387 | .get_status = acpi_video_output_get, | |
388 | }; | |
702ed512 ZR |
389 | |
390 | ||
391 | /* thermal cooling device callbacks */ | |
4a703a8f | 392 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 393 | long *state) |
702ed512 | 394 | { |
4a703a8f | 395 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
396 | struct acpi_video_device *video = acpi_driver_data(device); |
397 | ||
6503e5df MG |
398 | *state = video->brightness->count - 3; |
399 | return 0; | |
702ed512 ZR |
400 | } |
401 | ||
4a703a8f | 402 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 403 | long *state) |
702ed512 | 404 | { |
4a703a8f | 405 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 406 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 407 | unsigned long long level; |
6503e5df | 408 | int offset; |
702ed512 | 409 | |
c8890f90 ZR |
410 | if (acpi_video_device_lcd_get_level_current(video, &level)) |
411 | return -EINVAL; | |
6503e5df MG |
412 | for (offset = 2; offset < video->brightness->count; offset++) |
413 | if (level == video->brightness->levels[offset]) { | |
414 | *state = video->brightness->count - offset - 1; | |
415 | return 0; | |
416 | } | |
702ed512 ZR |
417 | |
418 | return -EINVAL; | |
419 | } | |
420 | ||
421 | static int | |
4a703a8f | 422 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 423 | { |
4a703a8f | 424 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
425 | struct acpi_video_device *video = acpi_driver_data(device); |
426 | int level; | |
427 | ||
428 | if ( state >= video->brightness->count - 2) | |
429 | return -EINVAL; | |
430 | ||
431 | state = video->brightness->count - state; | |
432 | level = video->brightness->levels[state -1]; | |
433 | return acpi_video_device_lcd_set_level(video, level); | |
434 | } | |
435 | ||
436 | static struct thermal_cooling_device_ops video_cooling_ops = { | |
437 | .get_max_state = video_get_max_state, | |
438 | .get_cur_state = video_get_cur_state, | |
439 | .set_cur_state = video_set_cur_state, | |
440 | }; | |
441 | ||
1da177e4 LT |
442 | /* -------------------------------------------------------------------------- |
443 | Video Management | |
444 | -------------------------------------------------------------------------- */ | |
445 | ||
446 | /* device */ | |
447 | ||
448 | static int | |
27663c58 | 449 | acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state) |
1da177e4 | 450 | { |
4be44fcd | 451 | int status; |
90130268 PM |
452 | |
453 | status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state); | |
1da177e4 | 454 | |
d550d98d | 455 | return status; |
1da177e4 LT |
456 | } |
457 | ||
458 | static int | |
4be44fcd | 459 | acpi_video_device_get_state(struct acpi_video_device *device, |
27663c58 | 460 | unsigned long long *state) |
1da177e4 | 461 | { |
4be44fcd | 462 | int status; |
1da177e4 | 463 | |
90130268 | 464 | status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state); |
1da177e4 | 465 | |
d550d98d | 466 | return status; |
1da177e4 LT |
467 | } |
468 | ||
469 | static int | |
4be44fcd | 470 | acpi_video_device_set_state(struct acpi_video_device *device, int state) |
1da177e4 | 471 | { |
4be44fcd LB |
472 | int status; |
473 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
474 | struct acpi_object_list args = { 1, &arg0 }; | |
27663c58 | 475 | unsigned long long ret; |
1da177e4 | 476 | |
1da177e4 LT |
477 | |
478 | arg0.integer.value = state; | |
90130268 | 479 | status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret); |
1da177e4 | 480 | |
d550d98d | 481 | return status; |
1da177e4 LT |
482 | } |
483 | ||
484 | static int | |
4be44fcd LB |
485 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
486 | union acpi_object **levels) | |
1da177e4 | 487 | { |
4be44fcd LB |
488 | int status; |
489 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
490 | union acpi_object *obj; | |
1da177e4 | 491 | |
1da177e4 LT |
492 | |
493 | *levels = NULL; | |
494 | ||
90130268 | 495 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 496 | if (!ACPI_SUCCESS(status)) |
d550d98d | 497 | return status; |
4be44fcd | 498 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 499 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 500 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
501 | status = -EFAULT; |
502 | goto err; | |
503 | } | |
504 | ||
505 | *levels = obj; | |
506 | ||
d550d98d | 507 | return 0; |
1da177e4 | 508 | |
4be44fcd | 509 | err: |
6044ec88 | 510 | kfree(buffer.pointer); |
1da177e4 | 511 | |
d550d98d | 512 | return status; |
1da177e4 LT |
513 | } |
514 | ||
515 | static int | |
4be44fcd | 516 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 517 | { |
24450c7a | 518 | int status; |
4be44fcd LB |
519 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
520 | struct acpi_object_list args = { 1, &arg0 }; | |
9e6dada9 | 521 | int state; |
1da177e4 | 522 | |
1da177e4 | 523 | arg0.integer.value = level; |
1da177e4 | 524 | |
24450c7a ZR |
525 | status = acpi_evaluate_object(device->dev->handle, "_BCM", |
526 | &args, NULL); | |
527 | if (ACPI_FAILURE(status)) { | |
528 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
529 | return -EIO; | |
530 | } | |
531 | ||
4500ca8e | 532 | device->brightness->curr = level; |
9e6dada9 | 533 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 534 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
535 | if (device->backlight) |
536 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
537 | return 0; |
538 | } | |
9e6dada9 | 539 | |
24450c7a ZR |
540 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
541 | return -EINVAL; | |
1da177e4 LT |
542 | } |
543 | ||
45cb50e6 ZR |
544 | /* |
545 | * For some buggy _BQC methods, we need to add a constant value to | |
546 | * the _BQC return value to get the actual current brightness level | |
547 | */ | |
548 | ||
549 | static int bqc_offset_aml_bug_workaround; | |
550 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
551 | { | |
552 | bqc_offset_aml_bug_workaround = 9; | |
553 | return 0; | |
554 | } | |
555 | ||
556 | static struct dmi_system_id video_dmi_table[] __initdata = { | |
557 | /* | |
558 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
559 | */ | |
560 | { | |
561 | .callback = video_set_bqc_offset, | |
562 | .ident = "Acer Aspire 5720", | |
563 | .matches = { | |
564 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
565 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
566 | }, | |
567 | }, | |
5afc4abe LB |
568 | { |
569 | .callback = video_set_bqc_offset, | |
570 | .ident = "Acer Aspire 5710Z", | |
571 | .matches = { | |
572 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
573 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
574 | }, | |
575 | }, | |
34ac272b ZR |
576 | { |
577 | .callback = video_set_bqc_offset, | |
578 | .ident = "eMachines E510", | |
579 | .matches = { | |
580 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
581 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
582 | }, | |
583 | }, | |
93bcece2 ZR |
584 | { |
585 | .callback = video_set_bqc_offset, | |
586 | .ident = "Acer Aspire 5315", | |
587 | .matches = { | |
588 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
589 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
590 | }, | |
591 | }, | |
152a4e63 ZR |
592 | { |
593 | .callback = video_set_bqc_offset, | |
594 | .ident = "Acer Aspire 7720", | |
595 | .matches = { | |
596 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
597 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
598 | }, | |
599 | }, | |
45cb50e6 ZR |
600 | {} |
601 | }; | |
602 | ||
1da177e4 | 603 | static int |
4be44fcd | 604 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
27663c58 | 605 | unsigned long long *level) |
1da177e4 | 606 | { |
c8890f90 | 607 | acpi_status status = AE_OK; |
4e231fa4 | 608 | int i; |
c8890f90 | 609 | |
c60d638e ZR |
610 | if (device->cap._BQC || device->cap._BCQ) { |
611 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
612 | ||
613 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
614 | NULL, level); |
615 | if (ACPI_SUCCESS(status)) { | |
1a7c618a ZR |
616 | if (device->brightness->flags._BQC_use_index) { |
617 | if (device->brightness->flags._BCL_reversed) | |
618 | *level = device->brightness->count | |
619 | - 3 - (*level); | |
620 | *level = device->brightness->levels[*level + 2]; | |
621 | ||
622 | } | |
45cb50e6 | 623 | *level += bqc_offset_aml_bug_workaround; |
4e231fa4 VS |
624 | for (i = 2; i < device->brightness->count; i++) |
625 | if (device->brightness->levels[i] == *level) { | |
626 | device->brightness->curr = *level; | |
627 | return 0; | |
628 | } | |
629 | /* BQC returned an invalid level. Stop using it. */ | |
630 | ACPI_WARNING((AE_INFO, "%s returned an invalid level", | |
631 | buf)); | |
632 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
633 | } else { |
634 | /* Fixme: | |
635 | * should we return an error or ignore this failure? | |
636 | * dev->brightness->curr is a cached value which stores | |
637 | * the correct current backlight level in most cases. | |
638 | * ACPI video backlight still works w/ buggy _BQC. | |
639 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
640 | */ | |
c60d638e ZR |
641 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
642 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
643 | } |
644 | } | |
645 | ||
4500ca8e | 646 | *level = device->brightness->curr; |
c8890f90 | 647 | return 0; |
1da177e4 LT |
648 | } |
649 | ||
650 | static int | |
4be44fcd LB |
651 | acpi_video_device_EDID(struct acpi_video_device *device, |
652 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 653 | { |
4be44fcd LB |
654 | int status; |
655 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
656 | union acpi_object *obj; | |
657 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
658 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 659 | |
1da177e4 LT |
660 | |
661 | *edid = NULL; | |
662 | ||
663 | if (!device) | |
d550d98d | 664 | return -ENODEV; |
1da177e4 LT |
665 | if (length == 128) |
666 | arg0.integer.value = 1; | |
667 | else if (length == 256) | |
668 | arg0.integer.value = 2; | |
669 | else | |
d550d98d | 670 | return -EINVAL; |
1da177e4 | 671 | |
90130268 | 672 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 673 | if (ACPI_FAILURE(status)) |
d550d98d | 674 | return -ENODEV; |
1da177e4 | 675 | |
50dd0969 | 676 | obj = buffer.pointer; |
1da177e4 LT |
677 | |
678 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
679 | *edid = obj; | |
680 | else { | |
6468463a | 681 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
682 | status = -EFAULT; |
683 | kfree(obj); | |
684 | } | |
685 | ||
d550d98d | 686 | return status; |
1da177e4 LT |
687 | } |
688 | ||
1da177e4 LT |
689 | /* bus */ |
690 | ||
691 | static int | |
4be44fcd | 692 | acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option) |
1da177e4 | 693 | { |
4be44fcd | 694 | int status; |
27663c58 | 695 | unsigned long long tmp; |
4be44fcd LB |
696 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
697 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 698 | |
1da177e4 LT |
699 | |
700 | arg0.integer.value = option; | |
701 | ||
90130268 | 702 | status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp); |
1da177e4 | 703 | if (ACPI_SUCCESS(status)) |
4be44fcd | 704 | status = tmp ? (-EINVAL) : (AE_OK); |
1da177e4 | 705 | |
d550d98d | 706 | return status; |
1da177e4 LT |
707 | } |
708 | ||
709 | static int | |
27663c58 | 710 | acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id) |
1da177e4 LT |
711 | { |
712 | int status; | |
713 | ||
90130268 | 714 | status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id); |
1da177e4 | 715 | |
d550d98d | 716 | return status; |
1da177e4 LT |
717 | } |
718 | ||
719 | static int | |
4be44fcd | 720 | acpi_video_bus_POST_options(struct acpi_video_bus *video, |
27663c58 | 721 | unsigned long long *options) |
1da177e4 | 722 | { |
4be44fcd | 723 | int status; |
1da177e4 | 724 | |
90130268 | 725 | status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options); |
1da177e4 LT |
726 | *options &= 3; |
727 | ||
d550d98d | 728 | return status; |
1da177e4 LT |
729 | } |
730 | ||
731 | /* | |
732 | * Arg: | |
733 | * video : video bus device pointer | |
734 | * bios_flag : | |
735 | * 0. The system BIOS should NOT automatically switch(toggle) | |
736 | * the active display output. | |
737 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 738 | * active display output. No switch event. |
1da177e4 LT |
739 | * 2. The _DGS value should be locked. |
740 | * 3. The system BIOS should not automatically switch (toggle) the | |
741 | * active display output, but instead generate the display switch | |
742 | * event notify code. | |
743 | * lcd_flag : | |
744 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 745 | * of the LCD when the power changes from AC to DC |
1da177e4 | 746 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 747 | * level of the LCD when the power changes from AC to DC. |
1da177e4 LT |
748 | * Return Value: |
749 | * -1 wrong arg. | |
750 | */ | |
751 | ||
752 | static int | |
4be44fcd | 753 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 754 | { |
4be44fcd LB |
755 | acpi_integer status = 0; |
756 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
757 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 758 | |
1da177e4 | 759 | |
4be44fcd | 760 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) { |
1da177e4 LT |
761 | status = -1; |
762 | goto Failed; | |
763 | } | |
764 | arg0.integer.value = (lcd_flag << 2) | bios_flag; | |
765 | video->dos_setting = arg0.integer.value; | |
90130268 | 766 | acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL); |
1da177e4 | 767 | |
4be44fcd | 768 | Failed: |
d550d98d | 769 | return status; |
1da177e4 LT |
770 | } |
771 | ||
935e5f29 ZR |
772 | /* |
773 | * Simple comparison function used to sort backlight levels. | |
774 | */ | |
775 | ||
776 | static int | |
777 | acpi_video_cmp_level(const void *a, const void *b) | |
778 | { | |
779 | return *(int *)a - *(int *)b; | |
780 | } | |
781 | ||
1da177e4 LT |
782 | /* |
783 | * Arg: | |
784 | * device : video output device (LCD, CRT, ..) | |
785 | * | |
786 | * Return Value: | |
469778c1 JJ |
787 | * Maximum brightness level |
788 | * | |
789 | * Allocate and initialize device->brightness. | |
790 | */ | |
791 | ||
792 | static int | |
793 | acpi_video_init_brightness(struct acpi_video_device *device) | |
794 | { | |
795 | union acpi_object *obj = NULL; | |
d32f6947 | 796 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 797 | unsigned long long level, level_old; |
469778c1 JJ |
798 | union acpi_object *o; |
799 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 800 | int result = -EINVAL; |
469778c1 JJ |
801 | |
802 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
803 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
804 | "LCD brightness level\n")); | |
805 | goto out; | |
806 | } | |
807 | ||
808 | if (obj->package.count < 2) | |
809 | goto out; | |
810 | ||
811 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
812 | if (!br) { | |
813 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 814 | result = -ENOMEM; |
469778c1 JJ |
815 | goto out; |
816 | } | |
817 | ||
d32f6947 | 818 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 819 | GFP_KERNEL); |
1a7c618a ZR |
820 | if (!br->levels) { |
821 | result = -ENOMEM; | |
469778c1 | 822 | goto out_free; |
1a7c618a | 823 | } |
469778c1 JJ |
824 | |
825 | for (i = 0; i < obj->package.count; i++) { | |
826 | o = (union acpi_object *)&obj->package.elements[i]; | |
827 | if (o->type != ACPI_TYPE_INTEGER) { | |
828 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
829 | continue; | |
830 | } | |
831 | br->levels[count] = (u32) o->integer.value; | |
832 | ||
833 | if (br->levels[count] > max_level) | |
834 | max_level = br->levels[count]; | |
835 | count++; | |
836 | } | |
837 | ||
d32f6947 ZR |
838 | /* |
839 | * some buggy BIOS don't export the levels | |
840 | * when machine is on AC/Battery in _BCL package. | |
841 | * In this case, the first two elements in _BCL packages | |
842 | * are also supported brightness levels that OS should take care of. | |
843 | */ | |
90af2cf6 ZR |
844 | for (i = 2; i < count; i++) { |
845 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 846 | level_ac_battery++; |
90af2cf6 ZR |
847 | if (br->levels[i] == br->levels[1]) |
848 | level_ac_battery++; | |
849 | } | |
d32f6947 ZR |
850 | |
851 | if (level_ac_battery < 2) { | |
852 | level_ac_battery = 2 - level_ac_battery; | |
853 | br->flags._BCL_no_ac_battery_levels = 1; | |
854 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
855 | br->levels[i] = br->levels[i - level_ac_battery]; | |
856 | count += level_ac_battery; | |
857 | } else if (level_ac_battery > 2) | |
858 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n")); | |
859 | ||
d80fb99f ZR |
860 | /* Check if the _BCL package is in a reversed order */ |
861 | if (max_level == br->levels[2]) { | |
862 | br->flags._BCL_reversed = 1; | |
863 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
864 | acpi_video_cmp_level, NULL); | |
865 | } else if (max_level != br->levels[count - 1]) | |
866 | ACPI_ERROR((AE_INFO, | |
867 | "Found unordered _BCL package\n")); | |
469778c1 JJ |
868 | |
869 | br->count = count; | |
870 | device->brightness = br; | |
1a7c618a ZR |
871 | |
872 | /* Check the input/output of _BQC/_BCL/_BCM */ | |
873 | if ((max_level < 100) && (max_level <= (count - 2))) | |
874 | br->flags._BCL_use_index = 1; | |
875 | ||
876 | /* | |
877 | * _BCM is always consistent with _BCL, | |
878 | * at least for all the laptops we have ever seen. | |
879 | */ | |
880 | br->flags._BCM_use_index = br->flags._BCL_use_index; | |
881 | ||
882 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ | |
90c53ca4 | 883 | br->curr = level = max_level; |
e047cca6 ZR |
884 | |
885 | if (!device->cap._BQC) | |
886 | goto set_level; | |
887 | ||
1a7c618a ZR |
888 | result = acpi_video_device_lcd_get_level_current(device, &level_old); |
889 | if (result) | |
890 | goto out_free_levels; | |
891 | ||
e047cca6 ZR |
892 | /* |
893 | * Set the level to maximum and check if _BQC uses indexed value | |
894 | */ | |
895 | result = acpi_video_device_lcd_set_level(device, max_level); | |
1a7c618a ZR |
896 | if (result) |
897 | goto out_free_levels; | |
898 | ||
899 | result = acpi_video_device_lcd_get_level_current(device, &level); | |
900 | if (result) | |
901 | goto out_free_levels; | |
902 | ||
e047cca6 ZR |
903 | br->flags._BQC_use_index = (level == max_level ? 0 : 1); |
904 | ||
90c53ca4 ZR |
905 | if (!br->flags._BQC_use_index) { |
906 | /* | |
907 | * Set the backlight to the initial state. | |
908 | * On some buggy laptops, _BQC returns an uninitialized value | |
909 | * when invoked for the first time, i.e. level_old is invalid. | |
910 | * set the backlight to max_level in this case | |
911 | */ | |
912 | for (i = 2; i < br->count; i++) | |
913 | if (level_old == br->levels[i]) | |
914 | level = level_old; | |
e047cca6 | 915 | goto set_level; |
90c53ca4 | 916 | } |
e047cca6 ZR |
917 | |
918 | if (br->flags._BCL_reversed) | |
919 | level_old = (br->count - 1) - level_old; | |
90c53ca4 | 920 | level = br->levels[level_old]; |
e047cca6 ZR |
921 | |
922 | set_level: | |
90c53ca4 | 923 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
924 | if (result) |
925 | goto out_free_levels; | |
1a7c618a | 926 | |
d32f6947 ZR |
927 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
928 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 929 | kfree(obj); |
1a7c618a | 930 | return result; |
469778c1 JJ |
931 | |
932 | out_free_levels: | |
933 | kfree(br->levels); | |
934 | out_free: | |
935 | kfree(br); | |
936 | out: | |
937 | device->brightness = NULL; | |
938 | kfree(obj); | |
1a7c618a | 939 | return result; |
469778c1 JJ |
940 | } |
941 | ||
942 | /* | |
943 | * Arg: | |
944 | * device : video output device (LCD, CRT, ..) | |
945 | * | |
946 | * Return Value: | |
1da177e4 LT |
947 | * None |
948 | * | |
98fb8fe1 | 949 | * Find out all required AML methods defined under the output |
1da177e4 LT |
950 | * device. |
951 | */ | |
952 | ||
4be44fcd | 953 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 954 | { |
1da177e4 | 955 | acpi_handle h_dummy1; |
1da177e4 | 956 | |
90130268 | 957 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { |
1da177e4 LT |
958 | device->cap._ADR = 1; |
959 | } | |
90130268 | 960 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) { |
4be44fcd | 961 | device->cap._BCL = 1; |
1da177e4 | 962 | } |
90130268 | 963 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) { |
4be44fcd | 964 | device->cap._BCM = 1; |
1da177e4 | 965 | } |
2f3d000a YL |
966 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1))) |
967 | device->cap._BQC = 1; | |
c60d638e ZR |
968 | else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ", |
969 | &h_dummy1))) { | |
970 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); | |
971 | device->cap._BCQ = 1; | |
972 | } | |
973 | ||
90130268 | 974 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { |
4be44fcd | 975 | device->cap._DDC = 1; |
1da177e4 | 976 | } |
90130268 | 977 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) { |
1da177e4 LT |
978 | device->cap._DCS = 1; |
979 | } | |
90130268 | 980 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) { |
1da177e4 LT |
981 | device->cap._DGS = 1; |
982 | } | |
90130268 | 983 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) { |
1da177e4 LT |
984 | device->cap._DSS = 1; |
985 | } | |
986 | ||
1a7c618a | 987 | if (acpi_video_backlight_support()) { |
702ed512 | 988 | int result; |
2f3d000a YL |
989 | static int count = 0; |
990 | char *name; | |
1a7c618a ZR |
991 | |
992 | result = acpi_video_init_brightness(device); | |
993 | if (result) | |
994 | return; | |
2f3d000a YL |
995 | name = kzalloc(MAX_NAME_LEN, GFP_KERNEL); |
996 | if (!name) | |
997 | return; | |
998 | ||
2f3d000a | 999 | sprintf(name, "acpi_video%d", count++); |
2f3d000a | 1000 | device->backlight = backlight_device_register(name, |
599a52d1 | 1001 | NULL, device, &acpi_backlight_ops); |
38531e6f | 1002 | device->backlight->props.max_brightness = device->brightness->count-3; |
2f3d000a | 1003 | kfree(name); |
702ed512 | 1004 | |
056c308d ZR |
1005 | result = sysfs_create_link(&device->backlight->dev.kobj, |
1006 | &device->dev->dev.kobj, "device"); | |
1007 | if (result) | |
1008 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1009 | ||
4a703a8f | 1010 | device->cooling_dev = thermal_cooling_device_register("LCD", |
702ed512 | 1011 | device->dev, &video_cooling_ops); |
4a703a8f | 1012 | if (IS_ERR(device->cooling_dev)) { |
4b4fe3b6 | 1013 | /* |
4a703a8f | 1014 | * Set cooling_dev to NULL so we don't crash trying to |
4b4fe3b6 DT |
1015 | * free it. |
1016 | * Also, why the hell we are returning early and | |
1017 | * not attempt to register video output if cooling | |
1018 | * device registration failed? | |
1019 | * -- dtor | |
1020 | */ | |
4a703a8f | 1021 | device->cooling_dev = NULL; |
43ff39f2 | 1022 | return; |
4b4fe3b6 | 1023 | } |
43ff39f2 | 1024 | |
fc3a8828 | 1025 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
4a703a8f | 1026 | device->cooling_dev->id); |
9030062f | 1027 | result = sysfs_create_link(&device->dev->dev.kobj, |
4a703a8f | 1028 | &device->cooling_dev->device.kobj, |
9030062f JL |
1029 | "thermal_cooling"); |
1030 | if (result) | |
1031 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
4a703a8f | 1032 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
9030062f JL |
1033 | &device->dev->dev.kobj, "device"); |
1034 | if (result) | |
1035 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1036 | ||
2f3d000a | 1037 | } |
c3d6de69 TR |
1038 | |
1039 | if (acpi_video_display_switch_support()) { | |
1040 | ||
1041 | if (device->cap._DCS && device->cap._DSS) { | |
1042 | static int count; | |
1043 | char *name; | |
1044 | name = kzalloc(MAX_NAME_LEN, GFP_KERNEL); | |
1045 | if (!name) | |
1046 | return; | |
1047 | sprintf(name, "acpi_video%d", count++); | |
1048 | device->output_dev = video_output_register(name, | |
1049 | NULL, device, &acpi_output_properties); | |
1050 | kfree(name); | |
1051 | } | |
23b0f015 | 1052 | } |
1da177e4 LT |
1053 | } |
1054 | ||
1055 | /* | |
1056 | * Arg: | |
1057 | * device : video output device (VGA) | |
1058 | * | |
1059 | * Return Value: | |
1060 | * None | |
1061 | * | |
98fb8fe1 | 1062 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
1063 | */ |
1064 | ||
4be44fcd | 1065 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1066 | { |
4be44fcd | 1067 | acpi_handle h_dummy1; |
1da177e4 | 1068 | |
90130268 | 1069 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { |
1da177e4 LT |
1070 | video->cap._DOS = 1; |
1071 | } | |
90130268 | 1072 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { |
1da177e4 LT |
1073 | video->cap._DOD = 1; |
1074 | } | |
90130268 | 1075 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { |
1da177e4 LT |
1076 | video->cap._ROM = 1; |
1077 | } | |
90130268 | 1078 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { |
1da177e4 LT |
1079 | video->cap._GPD = 1; |
1080 | } | |
90130268 | 1081 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { |
1da177e4 LT |
1082 | video->cap._SPD = 1; |
1083 | } | |
90130268 | 1084 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) { |
1da177e4 LT |
1085 | video->cap._VPO = 1; |
1086 | } | |
1087 | } | |
1088 | ||
1089 | /* | |
1090 | * Check whether the video bus device has required AML method to | |
1091 | * support the desired features | |
1092 | */ | |
1093 | ||
4be44fcd | 1094 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1095 | { |
4be44fcd | 1096 | acpi_status status = -ENOENT; |
1e4cffe7 | 1097 | struct pci_dev *dev; |
1da177e4 LT |
1098 | |
1099 | if (!video) | |
d550d98d | 1100 | return -EINVAL; |
1da177e4 | 1101 | |
1e4cffe7 | 1102 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1103 | if (!dev) |
1104 | return -ENODEV; | |
1e4cffe7 | 1105 | pci_dev_put(dev); |
22c13f9d | 1106 | |
1da177e4 LT |
1107 | /* Since there is no HID, CID and so on for VGA driver, we have |
1108 | * to check well known required nodes. | |
1109 | */ | |
1110 | ||
98fb8fe1 | 1111 | /* Does this device support video switching? */ |
3a1151e3 SB |
1112 | if (video->cap._DOS || video->cap._DOD) { |
1113 | if (!video->cap._DOS) { | |
1114 | printk(KERN_WARNING FW_BUG | |
1115 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1116 | acpi_device_bid(video->device)); | |
1117 | } | |
1da177e4 LT |
1118 | video->flags.multihead = 1; |
1119 | status = 0; | |
1120 | } | |
1121 | ||
98fb8fe1 | 1122 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1123 | if (video->cap._ROM) { |
1da177e4 LT |
1124 | video->flags.rom = 1; |
1125 | status = 0; | |
1126 | } | |
1127 | ||
98fb8fe1 | 1128 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1129 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1130 | video->flags.post = 1; |
1131 | status = 0; | |
1132 | } | |
1133 | ||
d550d98d | 1134 | return status; |
1da177e4 LT |
1135 | } |
1136 | ||
1137 | /* -------------------------------------------------------------------------- | |
1138 | FS Interface (/proc) | |
1139 | -------------------------------------------------------------------------- */ | |
1140 | ||
4be44fcd | 1141 | static struct proc_dir_entry *acpi_video_dir; |
1da177e4 LT |
1142 | |
1143 | /* video devices */ | |
1144 | ||
4be44fcd | 1145 | static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1146 | { |
50dd0969 | 1147 | struct acpi_video_device *dev = seq->private; |
1da177e4 | 1148 | |
1da177e4 LT |
1149 | |
1150 | if (!dev) | |
1151 | goto end; | |
1152 | ||
1153 | seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id); | |
1154 | seq_printf(seq, "type: "); | |
1155 | if (dev->flags.crt) | |
1156 | seq_printf(seq, "CRT\n"); | |
1157 | else if (dev->flags.lcd) | |
1158 | seq_printf(seq, "LCD\n"); | |
1159 | else if (dev->flags.tvout) | |
1160 | seq_printf(seq, "TVOUT\n"); | |
82cae999 RZ |
1161 | else if (dev->flags.dvi) |
1162 | seq_printf(seq, "DVI\n"); | |
1da177e4 LT |
1163 | else |
1164 | seq_printf(seq, "UNKNOWN\n"); | |
1165 | ||
4be44fcd | 1166 | seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no"); |
1da177e4 | 1167 | |
4be44fcd | 1168 | end: |
d550d98d | 1169 | return 0; |
1da177e4 LT |
1170 | } |
1171 | ||
1172 | static int | |
4be44fcd | 1173 | acpi_video_device_info_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1174 | { |
1175 | return single_open(file, acpi_video_device_info_seq_show, | |
1176 | PDE(inode)->data); | |
1177 | } | |
1178 | ||
4be44fcd | 1179 | static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1180 | { |
4be44fcd | 1181 | int status; |
50dd0969 | 1182 | struct acpi_video_device *dev = seq->private; |
27663c58 | 1183 | unsigned long long state; |
1da177e4 | 1184 | |
1da177e4 LT |
1185 | |
1186 | if (!dev) | |
1187 | goto end; | |
1188 | ||
1189 | status = acpi_video_device_get_state(dev, &state); | |
1190 | seq_printf(seq, "state: "); | |
1191 | if (ACPI_SUCCESS(status)) | |
27663c58 | 1192 | seq_printf(seq, "0x%02llx\n", state); |
1da177e4 LT |
1193 | else |
1194 | seq_printf(seq, "<not supported>\n"); | |
1195 | ||
1196 | status = acpi_video_device_query(dev, &state); | |
1197 | seq_printf(seq, "query: "); | |
1198 | if (ACPI_SUCCESS(status)) | |
27663c58 | 1199 | seq_printf(seq, "0x%02llx\n", state); |
1da177e4 LT |
1200 | else |
1201 | seq_printf(seq, "<not supported>\n"); | |
1202 | ||
4be44fcd | 1203 | end: |
d550d98d | 1204 | return 0; |
1da177e4 LT |
1205 | } |
1206 | ||
1207 | static int | |
4be44fcd | 1208 | acpi_video_device_state_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1209 | { |
1210 | return single_open(file, acpi_video_device_state_seq_show, | |
1211 | PDE(inode)->data); | |
1212 | } | |
1213 | ||
1214 | static ssize_t | |
4be44fcd LB |
1215 | acpi_video_device_write_state(struct file *file, |
1216 | const char __user * buffer, | |
1217 | size_t count, loff_t * data) | |
1da177e4 | 1218 | { |
4be44fcd | 1219 | int status; |
50dd0969 JE |
1220 | struct seq_file *m = file->private_data; |
1221 | struct acpi_video_device *dev = m->private; | |
4be44fcd LB |
1222 | char str[12] = { 0 }; |
1223 | u32 state = 0; | |
1da177e4 | 1224 | |
1da177e4 | 1225 | |
52a2b11c | 1226 | if (!dev || count >= sizeof(str)) |
d550d98d | 1227 | return -EINVAL; |
1da177e4 LT |
1228 | |
1229 | if (copy_from_user(str, buffer, count)) | |
d550d98d | 1230 | return -EFAULT; |
1da177e4 LT |
1231 | |
1232 | str[count] = 0; | |
1233 | state = simple_strtoul(str, NULL, 0); | |
4be44fcd | 1234 | state &= ((1ul << 31) | (1ul << 30) | (1ul << 0)); |
1da177e4 LT |
1235 | |
1236 | status = acpi_video_device_set_state(dev, state); | |
1237 | ||
1238 | if (status) | |
d550d98d | 1239 | return -EFAULT; |
1da177e4 | 1240 | |
d550d98d | 1241 | return count; |
1da177e4 LT |
1242 | } |
1243 | ||
1244 | static int | |
4be44fcd | 1245 | acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1246 | { |
50dd0969 | 1247 | struct acpi_video_device *dev = seq->private; |
4be44fcd | 1248 | int i; |
1da177e4 | 1249 | |
1da177e4 LT |
1250 | |
1251 | if (!dev || !dev->brightness) { | |
1252 | seq_printf(seq, "<not supported>\n"); | |
d550d98d | 1253 | return 0; |
1da177e4 LT |
1254 | } |
1255 | ||
1256 | seq_printf(seq, "levels: "); | |
0a3db1ce | 1257 | for (i = 2; i < dev->brightness->count; i++) |
1da177e4 LT |
1258 | seq_printf(seq, " %d", dev->brightness->levels[i]); |
1259 | seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr); | |
1260 | ||
d550d98d | 1261 | return 0; |
1da177e4 LT |
1262 | } |
1263 | ||
1264 | static int | |
4be44fcd | 1265 | acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1266 | { |
1267 | return single_open(file, acpi_video_device_brightness_seq_show, | |
1268 | PDE(inode)->data); | |
1269 | } | |
1270 | ||
1271 | static ssize_t | |
4be44fcd LB |
1272 | acpi_video_device_write_brightness(struct file *file, |
1273 | const char __user * buffer, | |
1274 | size_t count, loff_t * data) | |
1da177e4 | 1275 | { |
50dd0969 JE |
1276 | struct seq_file *m = file->private_data; |
1277 | struct acpi_video_device *dev = m->private; | |
c88c5786 | 1278 | char str[5] = { 0 }; |
4be44fcd LB |
1279 | unsigned int level = 0; |
1280 | int i; | |
1da177e4 | 1281 | |
1da177e4 | 1282 | |
52a2b11c | 1283 | if (!dev || !dev->brightness || count >= sizeof(str)) |
d550d98d | 1284 | return -EINVAL; |
1da177e4 LT |
1285 | |
1286 | if (copy_from_user(str, buffer, count)) | |
d550d98d | 1287 | return -EFAULT; |
1da177e4 LT |
1288 | |
1289 | str[count] = 0; | |
1290 | level = simple_strtoul(str, NULL, 0); | |
4be44fcd | 1291 | |
1da177e4 | 1292 | if (level > 100) |
d550d98d | 1293 | return -EFAULT; |
1da177e4 | 1294 | |
98fb8fe1 | 1295 | /* validate through the list of available levels */ |
0a3db1ce | 1296 | for (i = 2; i < dev->brightness->count; i++) |
1da177e4 | 1297 | if (level == dev->brightness->levels[i]) { |
24450c7a ZR |
1298 | if (!acpi_video_device_lcd_set_level(dev, level)) |
1299 | return count; | |
1da177e4 LT |
1300 | break; |
1301 | } | |
1302 | ||
24450c7a | 1303 | return -EINVAL; |
1da177e4 LT |
1304 | } |
1305 | ||
4be44fcd | 1306 | static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1307 | { |
50dd0969 | 1308 | struct acpi_video_device *dev = seq->private; |
4be44fcd LB |
1309 | int status; |
1310 | int i; | |
1311 | union acpi_object *edid = NULL; | |
1da177e4 | 1312 | |
1da177e4 LT |
1313 | |
1314 | if (!dev) | |
1315 | goto out; | |
1316 | ||
4be44fcd | 1317 | status = acpi_video_device_EDID(dev, &edid, 128); |
1da177e4 | 1318 | if (ACPI_FAILURE(status)) { |
4be44fcd | 1319 | status = acpi_video_device_EDID(dev, &edid, 256); |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | if (ACPI_FAILURE(status)) { | |
1323 | goto out; | |
1324 | } | |
1325 | ||
1326 | if (edid && edid->type == ACPI_TYPE_BUFFER) { | |
1327 | for (i = 0; i < edid->buffer.length; i++) | |
1328 | seq_putc(seq, edid->buffer.pointer[i]); | |
1329 | } | |
1330 | ||
4be44fcd | 1331 | out: |
1da177e4 LT |
1332 | if (!edid) |
1333 | seq_printf(seq, "<not supported>\n"); | |
1334 | else | |
1335 | kfree(edid); | |
1336 | ||
d550d98d | 1337 | return 0; |
1da177e4 LT |
1338 | } |
1339 | ||
1340 | static int | |
4be44fcd | 1341 | acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1342 | { |
1343 | return single_open(file, acpi_video_device_EDID_seq_show, | |
1344 | PDE(inode)->data); | |
1345 | } | |
1346 | ||
4be44fcd | 1347 | static int acpi_video_device_add_fs(struct acpi_device *device) |
1da177e4 | 1348 | { |
251cb0bc | 1349 | struct proc_dir_entry *entry, *device_dir; |
1da177e4 LT |
1350 | struct acpi_video_device *vid_dev; |
1351 | ||
50dd0969 | 1352 | vid_dev = acpi_driver_data(device); |
1da177e4 | 1353 | if (!vid_dev) |
d550d98d | 1354 | return -ENODEV; |
1da177e4 | 1355 | |
251cb0bc DT |
1356 | device_dir = proc_mkdir(acpi_device_bid(device), |
1357 | vid_dev->video->dir); | |
1358 | if (!device_dir) | |
1359 | return -ENOMEM; | |
1360 | ||
1da177e4 | 1361 | /* 'info' [R] */ |
e0066c4e | 1362 | entry = proc_create_data("info", S_IRUGO, device_dir, |
cf7acfab | 1363 | &acpi_video_device_info_fops, acpi_driver_data(device)); |
1da177e4 | 1364 | if (!entry) |
251cb0bc | 1365 | goto err_remove_dir; |
1da177e4 LT |
1366 | |
1367 | /* 'state' [R/W] */ | |
cf7acfab | 1368 | entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR, |
e0066c4e | 1369 | device_dir, |
cf7acfab DL |
1370 | &acpi_video_device_state_fops, |
1371 | acpi_driver_data(device)); | |
1da177e4 | 1372 | if (!entry) |
251cb0bc | 1373 | goto err_remove_info; |
1da177e4 LT |
1374 | |
1375 | /* 'brightness' [R/W] */ | |
cf7acfab | 1376 | entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR, |
e0066c4e | 1377 | device_dir, |
cf7acfab DL |
1378 | &acpi_video_device_brightness_fops, |
1379 | acpi_driver_data(device)); | |
1da177e4 | 1380 | if (!entry) |
251cb0bc | 1381 | goto err_remove_state; |
1da177e4 LT |
1382 | |
1383 | /* 'EDID' [R] */ | |
e0066c4e | 1384 | entry = proc_create_data("EDID", S_IRUGO, device_dir, |
cf7acfab DL |
1385 | &acpi_video_device_EDID_fops, |
1386 | acpi_driver_data(device)); | |
1da177e4 | 1387 | if (!entry) |
251cb0bc | 1388 | goto err_remove_brightness; |
1da177e4 | 1389 | |
e0066c4e AD |
1390 | acpi_device_dir(device) = device_dir; |
1391 | ||
d550d98d | 1392 | return 0; |
251cb0bc DT |
1393 | |
1394 | err_remove_brightness: | |
1395 | remove_proc_entry("brightness", device_dir); | |
1396 | err_remove_state: | |
1397 | remove_proc_entry("state", device_dir); | |
1398 | err_remove_info: | |
1399 | remove_proc_entry("info", device_dir); | |
1400 | err_remove_dir: | |
1401 | remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir); | |
1402 | return -ENOMEM; | |
1da177e4 LT |
1403 | } |
1404 | ||
4be44fcd | 1405 | static int acpi_video_device_remove_fs(struct acpi_device *device) |
1da177e4 LT |
1406 | { |
1407 | struct acpi_video_device *vid_dev; | |
251cb0bc | 1408 | struct proc_dir_entry *device_dir; |
1da177e4 | 1409 | |
50dd0969 | 1410 | vid_dev = acpi_driver_data(device); |
1da177e4 | 1411 | if (!vid_dev || !vid_dev->video || !vid_dev->video->dir) |
d550d98d | 1412 | return -ENODEV; |
1da177e4 | 1413 | |
251cb0bc DT |
1414 | device_dir = acpi_device_dir(device); |
1415 | if (device_dir) { | |
1416 | remove_proc_entry("info", device_dir); | |
1417 | remove_proc_entry("state", device_dir); | |
1418 | remove_proc_entry("brightness", device_dir); | |
1419 | remove_proc_entry("EDID", device_dir); | |
4be44fcd | 1420 | remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir); |
1da177e4 LT |
1421 | acpi_device_dir(device) = NULL; |
1422 | } | |
1423 | ||
d550d98d | 1424 | return 0; |
1da177e4 LT |
1425 | } |
1426 | ||
1da177e4 | 1427 | /* video bus */ |
4be44fcd | 1428 | static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1429 | { |
50dd0969 | 1430 | struct acpi_video_bus *video = seq->private; |
1da177e4 | 1431 | |
1da177e4 LT |
1432 | |
1433 | if (!video) | |
1434 | goto end; | |
1435 | ||
1436 | seq_printf(seq, "Switching heads: %s\n", | |
4be44fcd | 1437 | video->flags.multihead ? "yes" : "no"); |
1da177e4 | 1438 | seq_printf(seq, "Video ROM: %s\n", |
4be44fcd | 1439 | video->flags.rom ? "yes" : "no"); |
1da177e4 | 1440 | seq_printf(seq, "Device to be POSTed on boot: %s\n", |
4be44fcd | 1441 | video->flags.post ? "yes" : "no"); |
1da177e4 | 1442 | |
4be44fcd | 1443 | end: |
d550d98d | 1444 | return 0; |
1da177e4 LT |
1445 | } |
1446 | ||
4be44fcd | 1447 | static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 1448 | { |
4be44fcd LB |
1449 | return single_open(file, acpi_video_bus_info_seq_show, |
1450 | PDE(inode)->data); | |
1da177e4 LT |
1451 | } |
1452 | ||
4be44fcd | 1453 | static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1454 | { |
50dd0969 | 1455 | struct acpi_video_bus *video = seq->private; |
1da177e4 | 1456 | |
1da177e4 LT |
1457 | |
1458 | if (!video) | |
1459 | goto end; | |
1460 | ||
96b2dd1f | 1461 | printk(KERN_INFO PREFIX "Please implement %s\n", __func__); |
1da177e4 LT |
1462 | seq_printf(seq, "<TODO>\n"); |
1463 | ||
4be44fcd | 1464 | end: |
d550d98d | 1465 | return 0; |
1da177e4 LT |
1466 | } |
1467 | ||
4be44fcd | 1468 | static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1469 | { |
1470 | return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data); | |
1471 | } | |
1472 | ||
4be44fcd | 1473 | static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1474 | { |
50dd0969 | 1475 | struct acpi_video_bus *video = seq->private; |
27663c58 | 1476 | unsigned long long options; |
4be44fcd | 1477 | int status; |
1da177e4 | 1478 | |
1da177e4 LT |
1479 | |
1480 | if (!video) | |
1481 | goto end; | |
1482 | ||
1483 | status = acpi_video_bus_POST_options(video, &options); | |
1484 | if (ACPI_SUCCESS(status)) { | |
1485 | if (!(options & 1)) { | |
4be44fcd LB |
1486 | printk(KERN_WARNING PREFIX |
1487 | "The motherboard VGA device is not listed as a possible POST device.\n"); | |
1488 | printk(KERN_WARNING PREFIX | |
98fb8fe1 | 1489 | "This indicates a BIOS bug. Please contact the manufacturer.\n"); |
1da177e4 | 1490 | } |
4d939155 | 1491 | printk(KERN_WARNING "%llx\n", options); |
98fb8fe1 | 1492 | seq_printf(seq, "can POST: <integrated video>"); |
1da177e4 LT |
1493 | if (options & 2) |
1494 | seq_printf(seq, " <PCI video>"); | |
1495 | if (options & 4) | |
1496 | seq_printf(seq, " <AGP video>"); | |
1497 | seq_putc(seq, '\n'); | |
1498 | } else | |
1499 | seq_printf(seq, "<not supported>\n"); | |
4be44fcd | 1500 | end: |
d550d98d | 1501 | return 0; |
1da177e4 LT |
1502 | } |
1503 | ||
1504 | static int | |
4be44fcd | 1505 | acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 1506 | { |
4be44fcd LB |
1507 | return single_open(file, acpi_video_bus_POST_info_seq_show, |
1508 | PDE(inode)->data); | |
1da177e4 LT |
1509 | } |
1510 | ||
4be44fcd | 1511 | static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1512 | { |
50dd0969 | 1513 | struct acpi_video_bus *video = seq->private; |
4be44fcd | 1514 | int status; |
27663c58 | 1515 | unsigned long long id; |
1da177e4 | 1516 | |
1da177e4 LT |
1517 | |
1518 | if (!video) | |
1519 | goto end; | |
1520 | ||
4be44fcd | 1521 | status = acpi_video_bus_get_POST(video, &id); |
1da177e4 LT |
1522 | if (!ACPI_SUCCESS(status)) { |
1523 | seq_printf(seq, "<not supported>\n"); | |
1524 | goto end; | |
1525 | } | |
98fb8fe1 | 1526 | seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]); |
1da177e4 | 1527 | |
4be44fcd | 1528 | end: |
d550d98d | 1529 | return 0; |
1da177e4 LT |
1530 | } |
1531 | ||
4be44fcd | 1532 | static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1533 | { |
50dd0969 | 1534 | struct acpi_video_bus *video = seq->private; |
1da177e4 | 1535 | |
1da177e4 | 1536 | |
4be44fcd | 1537 | seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting); |
1da177e4 | 1538 | |
d550d98d | 1539 | return 0; |
1da177e4 LT |
1540 | } |
1541 | ||
4be44fcd | 1542 | static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 1543 | { |
4be44fcd LB |
1544 | return single_open(file, acpi_video_bus_POST_seq_show, |
1545 | PDE(inode)->data); | |
1da177e4 LT |
1546 | } |
1547 | ||
4be44fcd | 1548 | static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1549 | { |
1550 | return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data); | |
1551 | } | |
1552 | ||
1553 | static ssize_t | |
4be44fcd LB |
1554 | acpi_video_bus_write_POST(struct file *file, |
1555 | const char __user * buffer, | |
1556 | size_t count, loff_t * data) | |
1da177e4 | 1557 | { |
4be44fcd | 1558 | int status; |
50dd0969 JE |
1559 | struct seq_file *m = file->private_data; |
1560 | struct acpi_video_bus *video = m->private; | |
4be44fcd | 1561 | char str[12] = { 0 }; |
27663c58 | 1562 | unsigned long long opt, options; |
1da177e4 | 1563 | |
1da177e4 | 1564 | |
52a2b11c | 1565 | if (!video || count >= sizeof(str)) |
d550d98d | 1566 | return -EINVAL; |
1da177e4 LT |
1567 | |
1568 | status = acpi_video_bus_POST_options(video, &options); | |
1569 | if (!ACPI_SUCCESS(status)) | |
d550d98d | 1570 | return -EINVAL; |
1da177e4 LT |
1571 | |
1572 | if (copy_from_user(str, buffer, count)) | |
d550d98d | 1573 | return -EFAULT; |
1da177e4 LT |
1574 | |
1575 | str[count] = 0; | |
1576 | opt = strtoul(str, NULL, 0); | |
1577 | if (opt > 3) | |
d550d98d | 1578 | return -EFAULT; |
1da177e4 | 1579 | |
98fb8fe1 | 1580 | /* just in case an OEM 'forgot' the motherboard... */ |
1da177e4 LT |
1581 | options |= 1; |
1582 | ||
1583 | if (options & (1ul << opt)) { | |
4be44fcd | 1584 | status = acpi_video_bus_set_POST(video, opt); |
1da177e4 | 1585 | if (!ACPI_SUCCESS(status)) |
d550d98d | 1586 | return -EFAULT; |
1da177e4 LT |
1587 | |
1588 | } | |
1589 | ||
d550d98d | 1590 | return count; |
1da177e4 LT |
1591 | } |
1592 | ||
1593 | static ssize_t | |
4be44fcd LB |
1594 | acpi_video_bus_write_DOS(struct file *file, |
1595 | const char __user * buffer, | |
1596 | size_t count, loff_t * data) | |
1da177e4 | 1597 | { |
4be44fcd | 1598 | int status; |
50dd0969 JE |
1599 | struct seq_file *m = file->private_data; |
1600 | struct acpi_video_bus *video = m->private; | |
4be44fcd LB |
1601 | char str[12] = { 0 }; |
1602 | unsigned long opt; | |
1da177e4 | 1603 | |
1da177e4 | 1604 | |
52a2b11c | 1605 | if (!video || count >= sizeof(str)) |
d550d98d | 1606 | return -EINVAL; |
1da177e4 LT |
1607 | |
1608 | if (copy_from_user(str, buffer, count)) | |
d550d98d | 1609 | return -EFAULT; |
1da177e4 LT |
1610 | |
1611 | str[count] = 0; | |
1612 | opt = strtoul(str, NULL, 0); | |
1613 | if (opt > 7) | |
d550d98d | 1614 | return -EFAULT; |
1da177e4 | 1615 | |
4be44fcd | 1616 | status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2); |
1da177e4 LT |
1617 | |
1618 | if (!ACPI_SUCCESS(status)) | |
d550d98d | 1619 | return -EFAULT; |
1da177e4 | 1620 | |
d550d98d | 1621 | return count; |
1da177e4 LT |
1622 | } |
1623 | ||
4be44fcd | 1624 | static int acpi_video_bus_add_fs(struct acpi_device *device) |
1da177e4 | 1625 | { |
251cb0bc DT |
1626 | struct acpi_video_bus *video = acpi_driver_data(device); |
1627 | struct proc_dir_entry *device_dir; | |
1628 | struct proc_dir_entry *entry; | |
1da177e4 | 1629 | |
251cb0bc DT |
1630 | device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir); |
1631 | if (!device_dir) | |
1632 | return -ENOMEM; | |
1da177e4 | 1633 | |
1da177e4 | 1634 | /* 'info' [R] */ |
e0066c4e | 1635 | entry = proc_create_data("info", S_IRUGO, device_dir, |
cf7acfab DL |
1636 | &acpi_video_bus_info_fops, |
1637 | acpi_driver_data(device)); | |
1da177e4 | 1638 | if (!entry) |
251cb0bc | 1639 | goto err_remove_dir; |
1da177e4 LT |
1640 | |
1641 | /* 'ROM' [R] */ | |
e0066c4e | 1642 | entry = proc_create_data("ROM", S_IRUGO, device_dir, |
cf7acfab DL |
1643 | &acpi_video_bus_ROM_fops, |
1644 | acpi_driver_data(device)); | |
1da177e4 | 1645 | if (!entry) |
251cb0bc | 1646 | goto err_remove_info; |
1da177e4 LT |
1647 | |
1648 | /* 'POST_info' [R] */ | |
e0066c4e | 1649 | entry = proc_create_data("POST_info", S_IRUGO, device_dir, |
cf7acfab DL |
1650 | &acpi_video_bus_POST_info_fops, |
1651 | acpi_driver_data(device)); | |
1da177e4 | 1652 | if (!entry) |
251cb0bc | 1653 | goto err_remove_rom; |
1da177e4 LT |
1654 | |
1655 | /* 'POST' [R/W] */ | |
08acd4f8 | 1656 | entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR, |
e0066c4e | 1657 | device_dir, |
cf7acfab DL |
1658 | &acpi_video_bus_POST_fops, |
1659 | acpi_driver_data(device)); | |
1da177e4 | 1660 | if (!entry) |
251cb0bc | 1661 | goto err_remove_post_info; |
1da177e4 LT |
1662 | |
1663 | /* 'DOS' [R/W] */ | |
08acd4f8 | 1664 | entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR, |
e0066c4e | 1665 | device_dir, |
cf7acfab DL |
1666 | &acpi_video_bus_DOS_fops, |
1667 | acpi_driver_data(device)); | |
1da177e4 | 1668 | if (!entry) |
251cb0bc | 1669 | goto err_remove_post; |
1da177e4 | 1670 | |
251cb0bc | 1671 | video->dir = acpi_device_dir(device) = device_dir; |
d550d98d | 1672 | return 0; |
251cb0bc DT |
1673 | |
1674 | err_remove_post: | |
1675 | remove_proc_entry("POST", device_dir); | |
1676 | err_remove_post_info: | |
1677 | remove_proc_entry("POST_info", device_dir); | |
1678 | err_remove_rom: | |
1679 | remove_proc_entry("ROM", device_dir); | |
1680 | err_remove_info: | |
1681 | remove_proc_entry("info", device_dir); | |
1682 | err_remove_dir: | |
1683 | remove_proc_entry(acpi_device_bid(device), acpi_video_dir); | |
1684 | return -ENOMEM; | |
1da177e4 LT |
1685 | } |
1686 | ||
4be44fcd | 1687 | static int acpi_video_bus_remove_fs(struct acpi_device *device) |
1da177e4 | 1688 | { |
251cb0bc DT |
1689 | struct proc_dir_entry *device_dir = acpi_device_dir(device); |
1690 | ||
1691 | if (device_dir) { | |
1692 | remove_proc_entry("info", device_dir); | |
1693 | remove_proc_entry("ROM", device_dir); | |
1694 | remove_proc_entry("POST_info", device_dir); | |
1695 | remove_proc_entry("POST", device_dir); | |
1696 | remove_proc_entry("DOS", device_dir); | |
4be44fcd | 1697 | remove_proc_entry(acpi_device_bid(device), acpi_video_dir); |
1da177e4 LT |
1698 | acpi_device_dir(device) = NULL; |
1699 | } | |
1700 | ||
d550d98d | 1701 | return 0; |
1da177e4 LT |
1702 | } |
1703 | ||
1704 | /* -------------------------------------------------------------------------- | |
1705 | Driver Interface | |
1706 | -------------------------------------------------------------------------- */ | |
1707 | ||
1708 | /* device interface */ | |
82cae999 RZ |
1709 | static struct acpi_video_device_attrib* |
1710 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) | |
1711 | { | |
78eed028 DT |
1712 | struct acpi_video_enumerated_device *ids; |
1713 | int i; | |
1714 | ||
1715 | for (i = 0; i < video->attached_count; i++) { | |
1716 | ids = &video->attached_array[i]; | |
1717 | if ((ids->value.int_val & 0xffff) == device_id) | |
1718 | return &ids->value.attrib; | |
1719 | } | |
82cae999 | 1720 | |
82cae999 RZ |
1721 | return NULL; |
1722 | } | |
1da177e4 LT |
1723 | |
1724 | static int | |
4be44fcd LB |
1725 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1726 | struct acpi_video_bus *video) | |
1da177e4 | 1727 | { |
27663c58 | 1728 | unsigned long long device_id; |
973bf491 | 1729 | int status; |
4be44fcd | 1730 | struct acpi_video_device *data; |
82cae999 | 1731 | struct acpi_video_device_attrib* attribute; |
1da177e4 LT |
1732 | |
1733 | if (!device || !video) | |
d550d98d | 1734 | return -EINVAL; |
1da177e4 | 1735 | |
4be44fcd LB |
1736 | status = |
1737 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
1da177e4 LT |
1738 | if (ACPI_SUCCESS(status)) { |
1739 | ||
36bcbec7 | 1740 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1da177e4 | 1741 | if (!data) |
d550d98d | 1742 | return -ENOMEM; |
1da177e4 | 1743 | |
1da177e4 LT |
1744 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1745 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1746 | device->driver_data = data; |
1da177e4 LT |
1747 | |
1748 | data->device_id = device_id; | |
1749 | data->video = video; | |
1750 | data->dev = device; | |
1751 | ||
82cae999 RZ |
1752 | attribute = acpi_video_get_device_attr(video, device_id); |
1753 | ||
1754 | if((attribute != NULL) && attribute->device_id_scheme) { | |
1755 | switch (attribute->display_type) { | |
1756 | case ACPI_VIDEO_DISPLAY_CRT: | |
1757 | data->flags.crt = 1; | |
1758 | break; | |
1759 | case ACPI_VIDEO_DISPLAY_TV: | |
1760 | data->flags.tvout = 1; | |
1761 | break; | |
1762 | case ACPI_VIDEO_DISPLAY_DVI: | |
1763 | data->flags.dvi = 1; | |
1764 | break; | |
1765 | case ACPI_VIDEO_DISPLAY_LCD: | |
1766 | data->flags.lcd = 1; | |
1767 | break; | |
1768 | default: | |
1769 | data->flags.unknown = 1; | |
1770 | break; | |
1771 | } | |
1772 | if(attribute->bios_can_detect) | |
1773 | data->flags.bios = 1; | |
1774 | } else | |
1da177e4 | 1775 | data->flags.unknown = 1; |
4be44fcd | 1776 | |
1da177e4 LT |
1777 | acpi_video_device_bind(video, data); |
1778 | acpi_video_device_find_cap(data); | |
1779 | ||
90130268 | 1780 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1781 | ACPI_DEVICE_NOTIFY, |
1782 | acpi_video_device_notify, | |
1783 | data); | |
1da177e4 | 1784 | if (ACPI_FAILURE(status)) { |
55ac9a01 LM |
1785 | printk(KERN_ERR PREFIX |
1786 | "Error installing notify handler\n"); | |
973bf491 YL |
1787 | if(data->brightness) |
1788 | kfree(data->brightness->levels); | |
1789 | kfree(data->brightness); | |
1790 | kfree(data); | |
1791 | return -ENODEV; | |
1da177e4 LT |
1792 | } |
1793 | ||
bbac81f5 | 1794 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1795 | list_add_tail(&data->entry, &video->video_device_list); |
bbac81f5 | 1796 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1797 | |
1798 | acpi_video_device_add_fs(device); | |
1799 | ||
d550d98d | 1800 | return 0; |
1da177e4 LT |
1801 | } |
1802 | ||
d550d98d | 1803 | return -ENOENT; |
1da177e4 LT |
1804 | } |
1805 | ||
1806 | /* | |
1807 | * Arg: | |
1808 | * video : video bus device | |
1809 | * | |
1810 | * Return: | |
1811 | * none | |
1812 | * | |
1813 | * Enumerate the video device list of the video bus, | |
1814 | * bind the ids with the corresponding video devices | |
1815 | * under the video bus. | |
4be44fcd | 1816 | */ |
1da177e4 | 1817 | |
4be44fcd | 1818 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1819 | { |
ff102ea9 DT |
1820 | struct acpi_video_device *dev; |
1821 | ||
bbac81f5 | 1822 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1823 | |
1824 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1825 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1826 | |
bbac81f5 | 1827 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1828 | } |
1829 | ||
1830 | /* | |
1831 | * Arg: | |
1832 | * video : video bus device | |
1833 | * device : video output device under the video | |
1834 | * bus | |
1835 | * | |
1836 | * Return: | |
1837 | * none | |
1838 | * | |
1839 | * Bind the ids with the corresponding video devices | |
1840 | * under the video bus. | |
4be44fcd | 1841 | */ |
1da177e4 LT |
1842 | |
1843 | static void | |
4be44fcd LB |
1844 | acpi_video_device_bind(struct acpi_video_bus *video, |
1845 | struct acpi_video_device *device) | |
1da177e4 | 1846 | { |
78eed028 | 1847 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1848 | int i; |
1da177e4 | 1849 | |
78eed028 DT |
1850 | for (i = 0; i < video->attached_count; i++) { |
1851 | ids = &video->attached_array[i]; | |
1852 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1853 | ids->bind_info = device; | |
1da177e4 LT |
1854 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1855 | } | |
1856 | } | |
1da177e4 LT |
1857 | } |
1858 | ||
1859 | /* | |
1860 | * Arg: | |
1861 | * video : video bus device | |
1862 | * | |
1863 | * Return: | |
1864 | * < 0 : error | |
1865 | * | |
1866 | * Call _DOD to enumerate all devices attached to display adapter | |
1867 | * | |
4be44fcd | 1868 | */ |
1da177e4 LT |
1869 | |
1870 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1871 | { | |
4be44fcd LB |
1872 | int status; |
1873 | int count; | |
1874 | int i; | |
78eed028 | 1875 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1876 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1877 | union acpi_object *dod = NULL; | |
1878 | union acpi_object *obj; | |
1da177e4 | 1879 | |
90130268 | 1880 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1881 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1882 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1883 | return status; |
1da177e4 LT |
1884 | } |
1885 | ||
50dd0969 | 1886 | dod = buffer.pointer; |
1da177e4 | 1887 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1888 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1889 | status = -EFAULT; |
1890 | goto out; | |
1891 | } | |
1892 | ||
1893 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1894 | dod->package.count)); |
1da177e4 | 1895 | |
78eed028 DT |
1896 | active_list = kcalloc(1 + dod->package.count, |
1897 | sizeof(struct acpi_video_enumerated_device), | |
1898 | GFP_KERNEL); | |
1899 | if (!active_list) { | |
1da177e4 LT |
1900 | status = -ENOMEM; |
1901 | goto out; | |
1902 | } | |
1903 | ||
1904 | count = 0; | |
1905 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1906 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1907 | |
1908 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1909 | printk(KERN_ERR PREFIX |
1910 | "Invalid _DOD data in element %d\n", i); | |
1911 | continue; | |
1da177e4 | 1912 | } |
78eed028 DT |
1913 | |
1914 | active_list[count].value.int_val = obj->integer.value; | |
1915 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1916 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1917 | (int)obj->integer.value)); | |
1da177e4 LT |
1918 | count++; |
1919 | } | |
1da177e4 | 1920 | |
6044ec88 | 1921 | kfree(video->attached_array); |
4be44fcd | 1922 | |
78eed028 | 1923 | video->attached_array = active_list; |
1da177e4 | 1924 | video->attached_count = count; |
78eed028 DT |
1925 | |
1926 | out: | |
02438d87 | 1927 | kfree(buffer.pointer); |
d550d98d | 1928 | return status; |
1da177e4 LT |
1929 | } |
1930 | ||
4be44fcd LB |
1931 | static int |
1932 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1933 | u32 level_current, u32 event) | |
1da177e4 | 1934 | { |
63f0edfc | 1935 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1936 | max = max_below = 0; |
1937 | min = min_above = 255; | |
63f0edfc | 1938 | /* Find closest level to level_current */ |
0a3db1ce | 1939 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1940 | l = device->brightness->levels[i]; |
1941 | if (abs(l - level_current) < abs(delta)) { | |
1942 | delta = l - level_current; | |
1943 | if (!delta) | |
1944 | break; | |
1945 | } | |
1946 | } | |
1947 | /* Ajust level_current to closest available level */ | |
1948 | level_current += delta; | |
0a3db1ce | 1949 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1950 | l = device->brightness->levels[i]; |
1951 | if (l < min) | |
1952 | min = l; | |
1953 | if (l > max) | |
1954 | max = l; | |
1955 | if (l < min_above && l > level_current) | |
1956 | min_above = l; | |
1957 | if (l > max_below && l < level_current) | |
1958 | max_below = l; | |
1959 | } | |
1960 | ||
1961 | switch (event) { | |
1962 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1963 | return (level_current < max) ? min_above : min; | |
1964 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1965 | return (level_current < max) ? min_above : max; | |
1966 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1967 | return (level_current > min) ? max_below : min; | |
1968 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1969 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1970 | return 0; | |
1971 | default: | |
1972 | return level_current; | |
1973 | } | |
1da177e4 LT |
1974 | } |
1975 | ||
c8890f90 | 1976 | static int |
4be44fcd | 1977 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1978 | { |
27663c58 | 1979 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1980 | int result = -EINVAL; |
1981 | ||
469778c1 | 1982 | if (!device->brightness) |
c8890f90 ZR |
1983 | goto out; |
1984 | ||
1985 | result = acpi_video_device_lcd_get_level_current(device, | |
1986 | &level_current); | |
1987 | if (result) | |
1988 | goto out; | |
1989 | ||
1da177e4 | 1990 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1991 | |
24450c7a | 1992 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1993 | |
36342742 MG |
1994 | if (!result) |
1995 | backlight_force_update(device->backlight, | |
1996 | BACKLIGHT_UPDATE_HOTKEY); | |
1997 | ||
c8890f90 ZR |
1998 | out: |
1999 | if (result) | |
2000 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
2001 | ||
2002 | return result; | |
1da177e4 LT |
2003 | } |
2004 | ||
2005 | static int | |
4be44fcd LB |
2006 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
2007 | struct acpi_device *device) | |
1da177e4 | 2008 | { |
4be44fcd | 2009 | int status = 0; |
ff102ea9 | 2010 | struct acpi_device *dev; |
1da177e4 LT |
2011 | |
2012 | acpi_video_device_enumerate(video); | |
2013 | ||
ff102ea9 | 2014 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
2015 | |
2016 | status = acpi_video_bus_get_one_device(dev, video); | |
2017 | if (ACPI_FAILURE(status)) { | |
55ac9a01 LM |
2018 | printk(KERN_WARNING PREFIX |
2019 | "Cant attach device"); | |
1da177e4 LT |
2020 | continue; |
2021 | } | |
1da177e4 | 2022 | } |
d550d98d | 2023 | return status; |
1da177e4 LT |
2024 | } |
2025 | ||
4be44fcd | 2026 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
1da177e4 | 2027 | { |
031ec77b | 2028 | acpi_status status; |
1da177e4 LT |
2029 | struct acpi_video_bus *video; |
2030 | ||
1da177e4 LT |
2031 | |
2032 | if (!device || !device->video) | |
d550d98d | 2033 | return -ENOENT; |
1da177e4 LT |
2034 | |
2035 | video = device->video; | |
2036 | ||
1da177e4 LT |
2037 | acpi_video_device_remove_fs(device->dev); |
2038 | ||
90130268 | 2039 | status = acpi_remove_notify_handler(device->dev->handle, |
4be44fcd LB |
2040 | ACPI_DEVICE_NOTIFY, |
2041 | acpi_video_device_notify); | |
e29b3ee3 KP |
2042 | if (device->backlight) { |
2043 | sysfs_remove_link(&device->backlight->dev.kobj, "device"); | |
2044 | backlight_device_unregister(device->backlight); | |
2045 | device->backlight = NULL; | |
2046 | } | |
4a703a8f | 2047 | if (device->cooling_dev) { |
702ed512 ZR |
2048 | sysfs_remove_link(&device->dev->dev.kobj, |
2049 | "thermal_cooling"); | |
4a703a8f | 2050 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
702ed512 | 2051 | "device"); |
4a703a8f DT |
2052 | thermal_cooling_device_unregister(device->cooling_dev); |
2053 | device->cooling_dev = NULL; | |
702ed512 | 2054 | } |
23b0f015 | 2055 | video_output_unregister(device->output_dev); |
ff102ea9 | 2056 | |
d550d98d | 2057 | return 0; |
1da177e4 LT |
2058 | } |
2059 | ||
4be44fcd | 2060 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1da177e4 | 2061 | { |
4be44fcd | 2062 | int status; |
ff102ea9 | 2063 | struct acpi_video_device *dev, *next; |
1da177e4 | 2064 | |
bbac81f5 | 2065 | mutex_lock(&video->device_list_lock); |
1da177e4 | 2066 | |
ff102ea9 | 2067 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
1da177e4 | 2068 | |
ff102ea9 | 2069 | status = acpi_video_bus_put_one_device(dev); |
4be44fcd LB |
2070 | if (ACPI_FAILURE(status)) |
2071 | printk(KERN_WARNING PREFIX | |
2072 | "hhuuhhuu bug in acpi video driver.\n"); | |
1da177e4 | 2073 | |
ff102ea9 DT |
2074 | if (dev->brightness) { |
2075 | kfree(dev->brightness->levels); | |
2076 | kfree(dev->brightness); | |
2077 | } | |
2078 | list_del(&dev->entry); | |
2079 | kfree(dev); | |
1da177e4 LT |
2080 | } |
2081 | ||
bbac81f5 | 2082 | mutex_unlock(&video->device_list_lock); |
ff102ea9 | 2083 | |
d550d98d | 2084 | return 0; |
1da177e4 LT |
2085 | } |
2086 | ||
2087 | /* acpi_video interface */ | |
2088 | ||
4be44fcd | 2089 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 2090 | { |
a21101c4 | 2091 | return acpi_video_bus_DOS(video, 0, 0); |
1da177e4 LT |
2092 | } |
2093 | ||
4be44fcd | 2094 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 LT |
2095 | { |
2096 | return acpi_video_bus_DOS(video, 0, 1); | |
2097 | } | |
2098 | ||
7015558f | 2099 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 2100 | { |
7015558f | 2101 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 LY |
2102 | struct input_dev *input; |
2103 | int keycode; | |
2104 | ||
1da177e4 | 2105 | if (!video) |
d550d98d | 2106 | return; |
1da177e4 | 2107 | |
e9dab196 | 2108 | input = video->input; |
1da177e4 LT |
2109 | |
2110 | switch (event) { | |
98fb8fe1 | 2111 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 2112 | * most likely via hotkey. */ |
14e04fb3 | 2113 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 2114 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
2115 | break; |
2116 | ||
98fb8fe1 | 2117 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
2118 | * connector. */ |
2119 | acpi_video_device_enumerate(video); | |
2120 | acpi_video_device_rebind(video); | |
14e04fb3 | 2121 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 2122 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
2123 | break; |
2124 | ||
4be44fcd | 2125 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
25c87f7f | 2126 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2127 | keycode = KEY_SWITCHVIDEOMODE; |
2128 | break; | |
4be44fcd | 2129 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
25c87f7f | 2130 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2131 | keycode = KEY_VIDEO_NEXT; |
2132 | break; | |
4be44fcd | 2133 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
14e04fb3 | 2134 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 2135 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
2136 | break; |
2137 | ||
2138 | default: | |
e9dab196 | 2139 | keycode = KEY_UNKNOWN; |
1da177e4 | 2140 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 2141 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
2142 | break; |
2143 | } | |
2144 | ||
7761f638 | 2145 | acpi_notifier_call_chain(device, event, 0); |
e9dab196 LY |
2146 | input_report_key(input, keycode, 1); |
2147 | input_sync(input); | |
2148 | input_report_key(input, keycode, 0); | |
2149 | input_sync(input); | |
2150 | ||
d550d98d | 2151 | return; |
1da177e4 LT |
2152 | } |
2153 | ||
4be44fcd | 2154 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 2155 | { |
50dd0969 | 2156 | struct acpi_video_device *video_device = data; |
4be44fcd | 2157 | struct acpi_device *device = NULL; |
e9dab196 LY |
2158 | struct acpi_video_bus *bus; |
2159 | struct input_dev *input; | |
2160 | int keycode; | |
1da177e4 | 2161 | |
1da177e4 | 2162 | if (!video_device) |
d550d98d | 2163 | return; |
1da177e4 | 2164 | |
e6afa0de | 2165 | device = video_device->dev; |
e9dab196 LY |
2166 | bus = video_device->video; |
2167 | input = bus->input; | |
1da177e4 LT |
2168 | |
2169 | switch (event) { | |
4be44fcd | 2170 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
2171 | if (brightness_switch_enabled) |
2172 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 2173 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2174 | keycode = KEY_BRIGHTNESS_CYCLE; |
2175 | break; | |
4be44fcd | 2176 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
2177 | if (brightness_switch_enabled) |
2178 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 2179 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2180 | keycode = KEY_BRIGHTNESSUP; |
2181 | break; | |
4be44fcd | 2182 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
2183 | if (brightness_switch_enabled) |
2184 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 2185 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2186 | keycode = KEY_BRIGHTNESSDOWN; |
2187 | break; | |
4be44fcd | 2188 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */ |
8a681a4d ZR |
2189 | if (brightness_switch_enabled) |
2190 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 2191 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2192 | keycode = KEY_BRIGHTNESS_ZERO; |
2193 | break; | |
4be44fcd | 2194 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
2195 | if (brightness_switch_enabled) |
2196 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 2197 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 2198 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
2199 | break; |
2200 | default: | |
e9dab196 | 2201 | keycode = KEY_UNKNOWN; |
1da177e4 | 2202 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 2203 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
2204 | break; |
2205 | } | |
e9dab196 | 2206 | |
7761f638 | 2207 | acpi_notifier_call_chain(device, event, 0); |
e9dab196 LY |
2208 | input_report_key(input, keycode, 1); |
2209 | input_sync(input); | |
2210 | input_report_key(input, keycode, 0); | |
2211 | input_sync(input); | |
2212 | ||
d550d98d | 2213 | return; |
1da177e4 LT |
2214 | } |
2215 | ||
e6d9da1d | 2216 | static int instance; |
863c1490 MG |
2217 | static int acpi_video_resume(struct acpi_device *device) |
2218 | { | |
2219 | struct acpi_video_bus *video; | |
2220 | struct acpi_video_device *video_device; | |
2221 | int i; | |
2222 | ||
2223 | if (!device || !acpi_driver_data(device)) | |
2224 | return -EINVAL; | |
2225 | ||
2226 | video = acpi_driver_data(device); | |
2227 | ||
2228 | for (i = 0; i < video->attached_count; i++) { | |
2229 | video_device = video->attached_array[i].bind_info; | |
2230 | if (video_device && video_device->backlight) | |
2231 | acpi_video_set_brightness(video_device->backlight); | |
2232 | } | |
2233 | return AE_OK; | |
2234 | } | |
2235 | ||
4be44fcd | 2236 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 2237 | { |
f51e8391 | 2238 | struct acpi_video_bus *video; |
e9dab196 | 2239 | struct input_dev *input; |
f51e8391 | 2240 | int error; |
1da177e4 | 2241 | |
36bcbec7 | 2242 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 2243 | if (!video) |
d550d98d | 2244 | return -ENOMEM; |
1da177e4 | 2245 | |
e6d9da1d ZR |
2246 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
2247 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
2248 | if (instance) | |
2249 | device->pnp.bus_id[3] = '0' + instance; | |
2250 | instance ++; | |
2251 | } | |
f3b39f13 ZY |
2252 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
2253 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
2254 | if (instance) | |
2255 | device->pnp.bus_id[3] = '0' + instance; | |
2256 | instance++; | |
2257 | } | |
e6d9da1d | 2258 | |
e6afa0de | 2259 | video->device = device; |
1da177e4 LT |
2260 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
2261 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 2262 | device->driver_data = video; |
1da177e4 LT |
2263 | |
2264 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
2265 | error = acpi_video_bus_check(video); |
2266 | if (error) | |
2267 | goto err_free_video; | |
1da177e4 | 2268 | |
f51e8391 DT |
2269 | error = acpi_video_bus_add_fs(device); |
2270 | if (error) | |
2271 | goto err_free_video; | |
1da177e4 | 2272 | |
bbac81f5 | 2273 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
2274 | INIT_LIST_HEAD(&video->video_device_list); |
2275 | ||
2276 | acpi_video_bus_get_devices(video, device); | |
2277 | acpi_video_bus_start_devices(video); | |
2278 | ||
e9dab196 | 2279 | video->input = input = input_allocate_device(); |
f51e8391 DT |
2280 | if (!input) { |
2281 | error = -ENOMEM; | |
7015558f | 2282 | goto err_stop_video; |
f51e8391 | 2283 | } |
e9dab196 LY |
2284 | |
2285 | snprintf(video->phys, sizeof(video->phys), | |
2286 | "%s/video/input0", acpi_device_hid(video->device)); | |
2287 | ||
2288 | input->name = acpi_device_name(video->device); | |
2289 | input->phys = video->phys; | |
2290 | input->id.bustype = BUS_HOST; | |
2291 | input->id.product = 0x06; | |
91c05c66 | 2292 | input->dev.parent = &device->dev; |
e9dab196 LY |
2293 | input->evbit[0] = BIT(EV_KEY); |
2294 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
2295 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
2296 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
2297 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
2298 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
2299 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
2300 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
2301 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
2302 | set_bit(KEY_UNKNOWN, input->keybit); | |
e9dab196 | 2303 | |
f51e8391 DT |
2304 | error = input_register_device(input); |
2305 | if (error) | |
2306 | goto err_free_input_dev; | |
e9dab196 | 2307 | |
1da177e4 | 2308 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
2309 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
2310 | video->flags.multihead ? "yes" : "no", | |
2311 | video->flags.rom ? "yes" : "no", | |
2312 | video->flags.post ? "yes" : "no"); | |
1da177e4 | 2313 | |
f51e8391 DT |
2314 | return 0; |
2315 | ||
2316 | err_free_input_dev: | |
2317 | input_free_device(input); | |
f51e8391 DT |
2318 | err_stop_video: |
2319 | acpi_video_bus_stop_devices(video); | |
2320 | acpi_video_bus_put_devices(video); | |
2321 | kfree(video->attached_array); | |
2322 | acpi_video_bus_remove_fs(device); | |
2323 | err_free_video: | |
2324 | kfree(video); | |
db89b4f0 | 2325 | device->driver_data = NULL; |
1da177e4 | 2326 | |
f51e8391 | 2327 | return error; |
1da177e4 LT |
2328 | } |
2329 | ||
4be44fcd | 2330 | static int acpi_video_bus_remove(struct acpi_device *device, int type) |
1da177e4 | 2331 | { |
4be44fcd | 2332 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2333 | |
1da177e4 LT |
2334 | |
2335 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2336 | return -EINVAL; |
1da177e4 | 2337 | |
50dd0969 | 2338 | video = acpi_driver_data(device); |
1da177e4 LT |
2339 | |
2340 | acpi_video_bus_stop_devices(video); | |
1da177e4 LT |
2341 | acpi_video_bus_put_devices(video); |
2342 | acpi_video_bus_remove_fs(device); | |
2343 | ||
e9dab196 | 2344 | input_unregister_device(video->input); |
6044ec88 | 2345 | kfree(video->attached_array); |
1da177e4 LT |
2346 | kfree(video); |
2347 | ||
d550d98d | 2348 | return 0; |
1da177e4 LT |
2349 | } |
2350 | ||
74a365b3 MG |
2351 | static int __init intel_opregion_present(void) |
2352 | { | |
2353 | #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE) | |
2354 | struct pci_dev *dev = NULL; | |
2355 | u32 address; | |
2356 | ||
2357 | for_each_pci_dev(dev) { | |
2358 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2359 | continue; | |
2360 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2361 | continue; | |
2362 | pci_read_config_dword(dev, 0xfc, &address); | |
2363 | if (!address) | |
2364 | continue; | |
2365 | return 1; | |
2366 | } | |
2367 | #endif | |
2368 | return 0; | |
2369 | } | |
2370 | ||
2371 | int acpi_video_register(void) | |
1da177e4 | 2372 | { |
4be44fcd | 2373 | int result = 0; |
86e437f0 ZY |
2374 | if (register_count) { |
2375 | /* | |
2376 | * if the function of acpi_video_register is already called, | |
2377 | * don't register the acpi_vide_bus again and return no error. | |
2378 | */ | |
2379 | return 0; | |
2380 | } | |
1da177e4 | 2381 | |
1da177e4 LT |
2382 | acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir); |
2383 | if (!acpi_video_dir) | |
d550d98d | 2384 | return -ENODEV; |
1da177e4 LT |
2385 | |
2386 | result = acpi_bus_register_driver(&acpi_video_bus); | |
2387 | if (result < 0) { | |
2388 | remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); | |
d550d98d | 2389 | return -ENODEV; |
1da177e4 LT |
2390 | } |
2391 | ||
86e437f0 ZY |
2392 | /* |
2393 | * When the acpi_video_bus is loaded successfully, increase | |
2394 | * the counter reference. | |
2395 | */ | |
2396 | register_count = 1; | |
2397 | ||
d550d98d | 2398 | return 0; |
1da177e4 | 2399 | } |
74a365b3 MG |
2400 | EXPORT_SYMBOL(acpi_video_register); |
2401 | ||
86e437f0 ZY |
2402 | void acpi_video_unregister(void) |
2403 | { | |
2404 | if (!register_count) { | |
2405 | /* | |
2406 | * If the acpi video bus is already unloaded, don't | |
2407 | * unload it again and return directly. | |
2408 | */ | |
2409 | return; | |
2410 | } | |
2411 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2412 | ||
2413 | remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); | |
2414 | ||
2415 | register_count = 0; | |
2416 | ||
2417 | return; | |
2418 | } | |
2419 | EXPORT_SYMBOL(acpi_video_unregister); | |
2420 | ||
74a365b3 MG |
2421 | /* |
2422 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2423 | * the video opregion code to be run first in order to initialise | |
2424 | * state before any ACPI video calls are made. To handle this we defer | |
2425 | * registration of the video class until the opregion code has run. | |
2426 | */ | |
2427 | ||
2428 | static int __init acpi_video_init(void) | |
2429 | { | |
45cb50e6 ZR |
2430 | dmi_check_system(video_dmi_table); |
2431 | ||
74a365b3 MG |
2432 | if (intel_opregion_present()) |
2433 | return 0; | |
2434 | ||
2435 | return acpi_video_register(); | |
2436 | } | |
1da177e4 | 2437 | |
86e437f0 | 2438 | static void __exit acpi_video_exit(void) |
1da177e4 | 2439 | { |
86e437f0 | 2440 | acpi_video_unregister(); |
1da177e4 | 2441 | |
d550d98d | 2442 | return; |
1da177e4 LT |
2443 | } |
2444 | ||
2445 | module_init(acpi_video_init); | |
2446 | module_exit(acpi_video_exit); |