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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> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
1da177e4 | 43 | #include <asm/uaccess.h> |
eb27cae8 | 44 | #include <linux/dmi.h> |
1da177e4 LT |
45 | #include <acpi/acpi_bus.h> |
46 | #include <acpi/acpi_drivers.h> | |
47 | ||
a192a958 LB |
48 | #define PREFIX "ACPI: " |
49 | ||
1da177e4 | 50 | #define ACPI_VIDEO_CLASS "video" |
1da177e4 LT |
51 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
52 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
53 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
54 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
55 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
56 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
57 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
58 | ||
f4715189 TT |
59 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
60 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
61 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
62 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
63 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 64 | |
2f3d000a | 65 | #define MAX_NAME_LEN 20 |
1da177e4 | 66 | |
82cae999 RZ |
67 | #define ACPI_VIDEO_DISPLAY_CRT 1 |
68 | #define ACPI_VIDEO_DISPLAY_TV 2 | |
69 | #define ACPI_VIDEO_DISPLAY_DVI 3 | |
70 | #define ACPI_VIDEO_DISPLAY_LCD 4 | |
71 | ||
1da177e4 | 72 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 73 | ACPI_MODULE_NAME("video"); |
1da177e4 | 74 | |
f52fd66d | 75 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 76 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
77 | MODULE_LICENSE("GPL"); |
78 | ||
8a681a4d ZR |
79 | static int brightness_switch_enabled = 1; |
80 | module_param(brightness_switch_enabled, bool, 0644); | |
81 | ||
c504f8cb ZR |
82 | /* |
83 | * By default, we don't allow duplicate ACPI video bus devices | |
84 | * under the same VGA controller | |
85 | */ | |
86 | static int allow_duplicates; | |
87 | module_param(allow_duplicates, bool, 0644); | |
88 | ||
86e437f0 | 89 | static int register_count = 0; |
4be44fcd LB |
90 | static int acpi_video_bus_add(struct acpi_device *device); |
91 | static int acpi_video_bus_remove(struct acpi_device *device, int type); | |
863c1490 | 92 | static int acpi_video_resume(struct acpi_device *device); |
7015558f | 93 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 94 | |
1ba90e3a TR |
95 | static const struct acpi_device_id video_device_ids[] = { |
96 | {ACPI_VIDEO_HID, 0}, | |
97 | {"", 0}, | |
98 | }; | |
99 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
100 | ||
1da177e4 | 101 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 102 | .name = "video", |
1da177e4 | 103 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 104 | .ids = video_device_ids, |
1da177e4 LT |
105 | .ops = { |
106 | .add = acpi_video_bus_add, | |
107 | .remove = acpi_video_bus_remove, | |
863c1490 | 108 | .resume = acpi_video_resume, |
7015558f | 109 | .notify = acpi_video_bus_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | struct acpi_video_bus_flags { | |
4be44fcd LB |
114 | u8 multihead:1; /* can switch video heads */ |
115 | u8 rom:1; /* can retrieve a video rom */ | |
116 | u8 post:1; /* can configure the head to */ | |
117 | u8 reserved:5; | |
1da177e4 LT |
118 | }; |
119 | ||
120 | struct acpi_video_bus_cap { | |
4be44fcd LB |
121 | u8 _DOS:1; /*Enable/Disable output switching */ |
122 | u8 _DOD:1; /*Enumerate all devices attached to display adapter */ | |
123 | u8 _ROM:1; /*Get ROM Data */ | |
124 | u8 _GPD:1; /*Get POST Device */ | |
125 | u8 _SPD:1; /*Set POST Device */ | |
126 | u8 _VPO:1; /*Video POST Options */ | |
127 | u8 reserved:2; | |
1da177e4 LT |
128 | }; |
129 | ||
4be44fcd LB |
130 | struct acpi_video_device_attrib { |
131 | u32 display_index:4; /* A zero-based instance of the Display */ | |
98fb8fe1 | 132 | u32 display_port_attachment:4; /*This field differentiates the display type */ |
4be44fcd | 133 | u32 display_type:4; /*Describe the specific type in use */ |
98fb8fe1 | 134 | u32 vendor_specific:4; /*Chipset Vendor Specific */ |
4be44fcd LB |
135 | u32 bios_can_detect:1; /*BIOS can detect the device */ |
136 | u32 depend_on_vga:1; /*Non-VGA output device whose power is related to | |
137 | the VGA device. */ | |
138 | u32 pipe_id:3; /*For VGA multiple-head devices. */ | |
139 | u32 reserved:10; /*Must be 0 */ | |
140 | u32 device_id_scheme:1; /*Device ID Scheme */ | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_video_enumerated_device { | |
144 | union { | |
145 | u32 int_val; | |
4be44fcd | 146 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
147 | } value; |
148 | struct acpi_video_device *bind_info; | |
149 | }; | |
150 | ||
151 | struct acpi_video_bus { | |
e6afa0de | 152 | struct acpi_device *device; |
4be44fcd | 153 | u8 dos_setting; |
1da177e4 | 154 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
155 | u8 attached_count; |
156 | struct acpi_video_bus_cap cap; | |
1da177e4 | 157 | struct acpi_video_bus_flags flags; |
4be44fcd | 158 | struct list_head video_device_list; |
bbac81f5 | 159 | struct mutex device_list_lock; /* protects video_device_list */ |
4be44fcd | 160 | struct proc_dir_entry *dir; |
e9dab196 LY |
161 | struct input_dev *input; |
162 | char phys[32]; /* for input device */ | |
1da177e4 LT |
163 | }; |
164 | ||
165 | struct acpi_video_device_flags { | |
4be44fcd LB |
166 | u8 crt:1; |
167 | u8 lcd:1; | |
168 | u8 tvout:1; | |
82cae999 | 169 | u8 dvi:1; |
4be44fcd LB |
170 | u8 bios:1; |
171 | u8 unknown:1; | |
82cae999 | 172 | u8 reserved:2; |
1da177e4 LT |
173 | }; |
174 | ||
175 | struct acpi_video_device_cap { | |
4be44fcd LB |
176 | u8 _ADR:1; /*Return the unique ID */ |
177 | u8 _BCL:1; /*Query list of brightness control levels supported */ | |
178 | u8 _BCM:1; /*Set the brightness level */ | |
2f3d000a | 179 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 180 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
4be44fcd LB |
181 | u8 _DDC:1; /*Return the EDID for this device */ |
182 | u8 _DCS:1; /*Return status of output device */ | |
183 | u8 _DGS:1; /*Query graphics state */ | |
184 | u8 _DSS:1; /*Device state set */ | |
1da177e4 LT |
185 | }; |
186 | ||
d32f6947 ZR |
187 | struct acpi_video_brightness_flags { |
188 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
d80fb99f | 189 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/ |
1a7c618a ZR |
190 | u8 _BCL_use_index:1; /* levels in _BCL are index values */ |
191 | u8 _BCM_use_index:1; /* input of _BCM is an index value */ | |
192 | u8 _BQC_use_index:1; /* _BQC returns an index value */ | |
d32f6947 ZR |
193 | }; |
194 | ||
1da177e4 | 195 | struct acpi_video_device_brightness { |
4be44fcd LB |
196 | int curr; |
197 | int count; | |
198 | int *levels; | |
d32f6947 | 199 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
200 | }; |
201 | ||
202 | struct acpi_video_device { | |
4be44fcd LB |
203 | unsigned long device_id; |
204 | struct acpi_video_device_flags flags; | |
205 | struct acpi_video_device_cap cap; | |
206 | struct list_head entry; | |
207 | struct acpi_video_bus *video; | |
208 | struct acpi_device *dev; | |
1da177e4 | 209 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 210 | struct backlight_device *backlight; |
4a703a8f | 211 | struct thermal_cooling_device *cooling_dev; |
23b0f015 | 212 | struct output_device *output_dev; |
1da177e4 LT |
213 | }; |
214 | ||
1da177e4 LT |
215 | /* bus */ |
216 | static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file); | |
070d8eb1 | 217 | static const struct file_operations acpi_video_bus_info_fops = { |
cf7acfab | 218 | .owner = THIS_MODULE, |
4be44fcd LB |
219 | .open = acpi_video_bus_info_open_fs, |
220 | .read = seq_read, | |
221 | .llseek = seq_lseek, | |
222 | .release = single_release, | |
1da177e4 LT |
223 | }; |
224 | ||
225 | static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file); | |
070d8eb1 | 226 | static const struct file_operations acpi_video_bus_ROM_fops = { |
cf7acfab | 227 | .owner = THIS_MODULE, |
4be44fcd LB |
228 | .open = acpi_video_bus_ROM_open_fs, |
229 | .read = seq_read, | |
230 | .llseek = seq_lseek, | |
231 | .release = single_release, | |
1da177e4 LT |
232 | }; |
233 | ||
4be44fcd LB |
234 | static int acpi_video_bus_POST_info_open_fs(struct inode *inode, |
235 | struct file *file); | |
070d8eb1 | 236 | static const struct file_operations acpi_video_bus_POST_info_fops = { |
cf7acfab | 237 | .owner = THIS_MODULE, |
4be44fcd LB |
238 | .open = acpi_video_bus_POST_info_open_fs, |
239 | .read = seq_read, | |
240 | .llseek = seq_lseek, | |
241 | .release = single_release, | |
1da177e4 LT |
242 | }; |
243 | ||
244 | static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file); | |
c07c9a78 | 245 | static ssize_t acpi_video_bus_write_POST(struct file *file, |
b7171ae7 JE |
246 | const char __user *buffer, size_t count, loff_t *data); |
247 | static const struct file_operations acpi_video_bus_POST_fops = { | |
cf7acfab | 248 | .owner = THIS_MODULE, |
4be44fcd LB |
249 | .open = acpi_video_bus_POST_open_fs, |
250 | .read = seq_read, | |
b7171ae7 | 251 | .write = acpi_video_bus_write_POST, |
4be44fcd LB |
252 | .llseek = seq_lseek, |
253 | .release = single_release, | |
1da177e4 LT |
254 | }; |
255 | ||
1da177e4 | 256 | static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file); |
c07c9a78 | 257 | static ssize_t acpi_video_bus_write_DOS(struct file *file, |
b7171ae7 JE |
258 | const char __user *buffer, size_t count, loff_t *data); |
259 | static const struct file_operations acpi_video_bus_DOS_fops = { | |
cf7acfab | 260 | .owner = THIS_MODULE, |
4be44fcd LB |
261 | .open = acpi_video_bus_DOS_open_fs, |
262 | .read = seq_read, | |
b7171ae7 | 263 | .write = acpi_video_bus_write_DOS, |
4be44fcd LB |
264 | .llseek = seq_lseek, |
265 | .release = single_release, | |
1da177e4 LT |
266 | }; |
267 | ||
268 | /* device */ | |
4be44fcd LB |
269 | static int acpi_video_device_info_open_fs(struct inode *inode, |
270 | struct file *file); | |
070d8eb1 | 271 | static const struct file_operations acpi_video_device_info_fops = { |
cf7acfab | 272 | .owner = THIS_MODULE, |
4be44fcd LB |
273 | .open = acpi_video_device_info_open_fs, |
274 | .read = seq_read, | |
275 | .llseek = seq_lseek, | |
276 | .release = single_release, | |
1da177e4 LT |
277 | }; |
278 | ||
4be44fcd LB |
279 | static int acpi_video_device_state_open_fs(struct inode *inode, |
280 | struct file *file); | |
c07c9a78 | 281 | static ssize_t acpi_video_device_write_state(struct file *file, |
b7171ae7 JE |
282 | const char __user *buffer, size_t count, loff_t *data); |
283 | static const struct file_operations acpi_video_device_state_fops = { | |
cf7acfab | 284 | .owner = THIS_MODULE, |
4be44fcd LB |
285 | .open = acpi_video_device_state_open_fs, |
286 | .read = seq_read, | |
b7171ae7 | 287 | .write = acpi_video_device_write_state, |
4be44fcd LB |
288 | .llseek = seq_lseek, |
289 | .release = single_release, | |
1da177e4 LT |
290 | }; |
291 | ||
4be44fcd LB |
292 | static int acpi_video_device_brightness_open_fs(struct inode *inode, |
293 | struct file *file); | |
c07c9a78 | 294 | static ssize_t acpi_video_device_write_brightness(struct file *file, |
b7171ae7 | 295 | const char __user *buffer, size_t count, loff_t *data); |
828c0950 | 296 | static const struct file_operations acpi_video_device_brightness_fops = { |
cf7acfab | 297 | .owner = THIS_MODULE, |
4be44fcd LB |
298 | .open = acpi_video_device_brightness_open_fs, |
299 | .read = seq_read, | |
b7171ae7 | 300 | .write = acpi_video_device_write_brightness, |
4be44fcd LB |
301 | .llseek = seq_lseek, |
302 | .release = single_release, | |
1da177e4 LT |
303 | }; |
304 | ||
4be44fcd LB |
305 | static int acpi_video_device_EDID_open_fs(struct inode *inode, |
306 | struct file *file); | |
070d8eb1 | 307 | static const struct file_operations acpi_video_device_EDID_fops = { |
cf7acfab | 308 | .owner = THIS_MODULE, |
4be44fcd LB |
309 | .open = acpi_video_device_EDID_open_fs, |
310 | .read = seq_read, | |
311 | .llseek = seq_lseek, | |
312 | .release = single_release, | |
1da177e4 LT |
313 | }; |
314 | ||
b7171ae7 | 315 | static const char device_decode[][30] = { |
1da177e4 LT |
316 | "motherboard VGA device", |
317 | "PCI VGA device", | |
318 | "AGP VGA device", | |
319 | "UNKNOWN", | |
320 | }; | |
321 | ||
4be44fcd LB |
322 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
323 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
324 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
325 | struct acpi_video_device *device); | |
1da177e4 | 326 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
327 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
328 | int level); | |
329 | static int acpi_video_device_lcd_get_level_current( | |
330 | struct acpi_video_device *device, | |
70287db8 | 331 | unsigned long long *level, int init); |
4be44fcd LB |
332 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
333 | u32 level_current, u32 event); | |
c8890f90 | 334 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 335 | int event); |
23b0f015 | 336 | static int acpi_video_device_get_state(struct acpi_video_device *device, |
27663c58 | 337 | unsigned long long *state); |
23b0f015 LY |
338 | static int acpi_video_output_get(struct output_device *od); |
339 | static int acpi_video_device_set_state(struct acpi_video_device *device, int state); | |
1da177e4 | 340 | |
2f3d000a YL |
341 | /*backlight device sysfs support*/ |
342 | static int acpi_video_get_brightness(struct backlight_device *bd) | |
343 | { | |
27663c58 | 344 | unsigned long long cur_level; |
38531e6f | 345 | int i; |
2f3d000a | 346 | struct acpi_video_device *vd = |
655bfd7a | 347 | (struct acpi_video_device *)bl_get_data(bd); |
c8890f90 | 348 | |
70287db8 | 349 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, 0)) |
c8890f90 | 350 | return -EINVAL; |
38531e6f MG |
351 | for (i = 2; i < vd->brightness->count; i++) { |
352 | if (vd->brightness->levels[i] == cur_level) | |
353 | /* The first two entries are special - see page 575 | |
354 | of the ACPI spec 3.0 */ | |
355 | return i-2; | |
356 | } | |
357 | return 0; | |
2f3d000a YL |
358 | } |
359 | ||
360 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
361 | { | |
24450c7a | 362 | int request_level = bd->props.brightness + 2; |
2f3d000a | 363 | struct acpi_video_device *vd = |
655bfd7a | 364 | (struct acpi_video_device *)bl_get_data(bd); |
24450c7a ZR |
365 | |
366 | return acpi_video_device_lcd_set_level(vd, | |
367 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
368 | } |
369 | ||
599a52d1 RP |
370 | static struct backlight_ops acpi_backlight_ops = { |
371 | .get_brightness = acpi_video_get_brightness, | |
372 | .update_status = acpi_video_set_brightness, | |
373 | }; | |
374 | ||
23b0f015 LY |
375 | /*video output device sysfs support*/ |
376 | static int acpi_video_output_get(struct output_device *od) | |
377 | { | |
27663c58 | 378 | unsigned long long state; |
23b0f015 | 379 | struct acpi_video_device *vd = |
60043428 | 380 | (struct acpi_video_device *)dev_get_drvdata(&od->dev); |
23b0f015 LY |
381 | acpi_video_device_get_state(vd, &state); |
382 | return (int)state; | |
383 | } | |
384 | ||
385 | static int acpi_video_output_set(struct output_device *od) | |
386 | { | |
387 | unsigned long state = od->request_state; | |
388 | struct acpi_video_device *vd= | |
60043428 | 389 | (struct acpi_video_device *)dev_get_drvdata(&od->dev); |
23b0f015 LY |
390 | return acpi_video_device_set_state(vd, state); |
391 | } | |
392 | ||
393 | static struct output_properties acpi_output_properties = { | |
394 | .set_state = acpi_video_output_set, | |
395 | .get_status = acpi_video_output_get, | |
396 | }; | |
702ed512 ZR |
397 | |
398 | ||
399 | /* thermal cooling device callbacks */ | |
4a703a8f | 400 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 401 | long *state) |
702ed512 | 402 | { |
4a703a8f | 403 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
404 | struct acpi_video_device *video = acpi_driver_data(device); |
405 | ||
6503e5df MG |
406 | *state = video->brightness->count - 3; |
407 | return 0; | |
702ed512 ZR |
408 | } |
409 | ||
4a703a8f | 410 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 411 | long *state) |
702ed512 | 412 | { |
4a703a8f | 413 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 414 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 415 | unsigned long long level; |
6503e5df | 416 | int offset; |
702ed512 | 417 | |
70287db8 | 418 | if (acpi_video_device_lcd_get_level_current(video, &level, 0)) |
c8890f90 | 419 | return -EINVAL; |
6503e5df MG |
420 | for (offset = 2; offset < video->brightness->count; offset++) |
421 | if (level == video->brightness->levels[offset]) { | |
422 | *state = video->brightness->count - offset - 1; | |
423 | return 0; | |
424 | } | |
702ed512 ZR |
425 | |
426 | return -EINVAL; | |
427 | } | |
428 | ||
429 | static int | |
4a703a8f | 430 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 431 | { |
4a703a8f | 432 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
433 | struct acpi_video_device *video = acpi_driver_data(device); |
434 | int level; | |
435 | ||
436 | if ( state >= video->brightness->count - 2) | |
437 | return -EINVAL; | |
438 | ||
439 | state = video->brightness->count - state; | |
440 | level = video->brightness->levels[state -1]; | |
441 | return acpi_video_device_lcd_set_level(video, level); | |
442 | } | |
443 | ||
444 | static struct thermal_cooling_device_ops video_cooling_ops = { | |
445 | .get_max_state = video_get_max_state, | |
446 | .get_cur_state = video_get_cur_state, | |
447 | .set_cur_state = video_set_cur_state, | |
448 | }; | |
449 | ||
1da177e4 LT |
450 | /* -------------------------------------------------------------------------- |
451 | Video Management | |
452 | -------------------------------------------------------------------------- */ | |
453 | ||
454 | /* device */ | |
455 | ||
456 | static int | |
27663c58 | 457 | acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state) |
1da177e4 | 458 | { |
4be44fcd | 459 | int status; |
90130268 PM |
460 | |
461 | status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state); | |
1da177e4 | 462 | |
d550d98d | 463 | return status; |
1da177e4 LT |
464 | } |
465 | ||
466 | static int | |
4be44fcd | 467 | acpi_video_device_get_state(struct acpi_video_device *device, |
27663c58 | 468 | unsigned long long *state) |
1da177e4 | 469 | { |
4be44fcd | 470 | int status; |
1da177e4 | 471 | |
90130268 | 472 | status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state); |
1da177e4 | 473 | |
d550d98d | 474 | return status; |
1da177e4 LT |
475 | } |
476 | ||
477 | static int | |
4be44fcd | 478 | acpi_video_device_set_state(struct acpi_video_device *device, int state) |
1da177e4 | 479 | { |
4be44fcd LB |
480 | int status; |
481 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
482 | struct acpi_object_list args = { 1, &arg0 }; | |
27663c58 | 483 | unsigned long long ret; |
1da177e4 | 484 | |
1da177e4 LT |
485 | |
486 | arg0.integer.value = state; | |
90130268 | 487 | status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret); |
1da177e4 | 488 | |
d550d98d | 489 | return status; |
1da177e4 LT |
490 | } |
491 | ||
492 | static int | |
4be44fcd LB |
493 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
494 | union acpi_object **levels) | |
1da177e4 | 495 | { |
4be44fcd LB |
496 | int status; |
497 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
498 | union acpi_object *obj; | |
1da177e4 | 499 | |
1da177e4 LT |
500 | |
501 | *levels = NULL; | |
502 | ||
90130268 | 503 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 504 | if (!ACPI_SUCCESS(status)) |
d550d98d | 505 | return status; |
4be44fcd | 506 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 507 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 508 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
509 | status = -EFAULT; |
510 | goto err; | |
511 | } | |
512 | ||
513 | *levels = obj; | |
514 | ||
d550d98d | 515 | return 0; |
1da177e4 | 516 | |
4be44fcd | 517 | err: |
6044ec88 | 518 | kfree(buffer.pointer); |
1da177e4 | 519 | |
d550d98d | 520 | return status; |
1da177e4 LT |
521 | } |
522 | ||
523 | static int | |
4be44fcd | 524 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 525 | { |
24450c7a | 526 | int status; |
4be44fcd LB |
527 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
528 | struct acpi_object_list args = { 1, &arg0 }; | |
9e6dada9 | 529 | int state; |
1da177e4 | 530 | |
1da177e4 | 531 | arg0.integer.value = level; |
1da177e4 | 532 | |
24450c7a ZR |
533 | status = acpi_evaluate_object(device->dev->handle, "_BCM", |
534 | &args, NULL); | |
535 | if (ACPI_FAILURE(status)) { | |
536 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
537 | return -EIO; | |
538 | } | |
539 | ||
4500ca8e | 540 | device->brightness->curr = level; |
9e6dada9 | 541 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 542 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
543 | if (device->backlight) |
544 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
545 | return 0; |
546 | } | |
9e6dada9 | 547 | |
24450c7a ZR |
548 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
549 | return -EINVAL; | |
1da177e4 LT |
550 | } |
551 | ||
45cb50e6 ZR |
552 | /* |
553 | * For some buggy _BQC methods, we need to add a constant value to | |
554 | * the _BQC return value to get the actual current brightness level | |
555 | */ | |
556 | ||
557 | static int bqc_offset_aml_bug_workaround; | |
558 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
559 | { | |
560 | bqc_offset_aml_bug_workaround = 9; | |
561 | return 0; | |
562 | } | |
563 | ||
564 | static struct dmi_system_id video_dmi_table[] __initdata = { | |
565 | /* | |
566 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
567 | */ | |
568 | { | |
569 | .callback = video_set_bqc_offset, | |
570 | .ident = "Acer Aspire 5720", | |
571 | .matches = { | |
572 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
573 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
574 | }, | |
575 | }, | |
5afc4abe LB |
576 | { |
577 | .callback = video_set_bqc_offset, | |
578 | .ident = "Acer Aspire 5710Z", | |
579 | .matches = { | |
580 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
581 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
582 | }, | |
583 | }, | |
34ac272b ZR |
584 | { |
585 | .callback = video_set_bqc_offset, | |
586 | .ident = "eMachines E510", | |
587 | .matches = { | |
588 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
589 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
590 | }, | |
591 | }, | |
93bcece2 ZR |
592 | { |
593 | .callback = video_set_bqc_offset, | |
594 | .ident = "Acer Aspire 5315", | |
595 | .matches = { | |
596 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
597 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
598 | }, | |
599 | }, | |
152a4e63 ZR |
600 | { |
601 | .callback = video_set_bqc_offset, | |
602 | .ident = "Acer Aspire 7720", | |
603 | .matches = { | |
604 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
605 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
606 | }, | |
607 | }, | |
45cb50e6 ZR |
608 | {} |
609 | }; | |
610 | ||
1da177e4 | 611 | static int |
4be44fcd | 612 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
70287db8 | 613 | unsigned long long *level, int init) |
1da177e4 | 614 | { |
c8890f90 | 615 | acpi_status status = AE_OK; |
4e231fa4 | 616 | int i; |
c8890f90 | 617 | |
c60d638e ZR |
618 | if (device->cap._BQC || device->cap._BCQ) { |
619 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
620 | ||
621 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
622 | NULL, level); |
623 | if (ACPI_SUCCESS(status)) { | |
1a7c618a ZR |
624 | if (device->brightness->flags._BQC_use_index) { |
625 | if (device->brightness->flags._BCL_reversed) | |
626 | *level = device->brightness->count | |
627 | - 3 - (*level); | |
628 | *level = device->brightness->levels[*level + 2]; | |
629 | ||
630 | } | |
45cb50e6 | 631 | *level += bqc_offset_aml_bug_workaround; |
4e231fa4 VS |
632 | for (i = 2; i < device->brightness->count; i++) |
633 | if (device->brightness->levels[i] == *level) { | |
634 | device->brightness->curr = *level; | |
635 | return 0; | |
636 | } | |
70287db8 MG |
637 | if (!init) { |
638 | /* | |
639 | * BQC returned an invalid level. | |
640 | * Stop using it. | |
641 | */ | |
642 | ACPI_WARNING((AE_INFO, | |
643 | "%s returned an invalid level", | |
644 | buf)); | |
645 | device->cap._BQC = device->cap._BCQ = 0; | |
646 | } | |
c8890f90 ZR |
647 | } else { |
648 | /* Fixme: | |
649 | * should we return an error or ignore this failure? | |
650 | * dev->brightness->curr is a cached value which stores | |
651 | * the correct current backlight level in most cases. | |
652 | * ACPI video backlight still works w/ buggy _BQC. | |
653 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
654 | */ | |
c60d638e ZR |
655 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
656 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
657 | } |
658 | } | |
659 | ||
4500ca8e | 660 | *level = device->brightness->curr; |
c8890f90 | 661 | return 0; |
1da177e4 LT |
662 | } |
663 | ||
664 | static int | |
4be44fcd LB |
665 | acpi_video_device_EDID(struct acpi_video_device *device, |
666 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 667 | { |
4be44fcd LB |
668 | int status; |
669 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
670 | union acpi_object *obj; | |
671 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
672 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 673 | |
1da177e4 LT |
674 | |
675 | *edid = NULL; | |
676 | ||
677 | if (!device) | |
d550d98d | 678 | return -ENODEV; |
1da177e4 LT |
679 | if (length == 128) |
680 | arg0.integer.value = 1; | |
681 | else if (length == 256) | |
682 | arg0.integer.value = 2; | |
683 | else | |
d550d98d | 684 | return -EINVAL; |
1da177e4 | 685 | |
90130268 | 686 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 687 | if (ACPI_FAILURE(status)) |
d550d98d | 688 | return -ENODEV; |
1da177e4 | 689 | |
50dd0969 | 690 | obj = buffer.pointer; |
1da177e4 LT |
691 | |
692 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
693 | *edid = obj; | |
694 | else { | |
6468463a | 695 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
696 | status = -EFAULT; |
697 | kfree(obj); | |
698 | } | |
699 | ||
d550d98d | 700 | return status; |
1da177e4 LT |
701 | } |
702 | ||
1da177e4 LT |
703 | /* bus */ |
704 | ||
705 | static int | |
4be44fcd | 706 | acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option) |
1da177e4 | 707 | { |
4be44fcd | 708 | int status; |
27663c58 | 709 | unsigned long long tmp; |
4be44fcd LB |
710 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
711 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 712 | |
1da177e4 LT |
713 | |
714 | arg0.integer.value = option; | |
715 | ||
90130268 | 716 | status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp); |
1da177e4 | 717 | if (ACPI_SUCCESS(status)) |
4be44fcd | 718 | status = tmp ? (-EINVAL) : (AE_OK); |
1da177e4 | 719 | |
d550d98d | 720 | return status; |
1da177e4 LT |
721 | } |
722 | ||
723 | static int | |
27663c58 | 724 | acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id) |
1da177e4 LT |
725 | { |
726 | int status; | |
727 | ||
90130268 | 728 | status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id); |
1da177e4 | 729 | |
d550d98d | 730 | return status; |
1da177e4 LT |
731 | } |
732 | ||
733 | static int | |
4be44fcd | 734 | acpi_video_bus_POST_options(struct acpi_video_bus *video, |
27663c58 | 735 | unsigned long long *options) |
1da177e4 | 736 | { |
4be44fcd | 737 | int status; |
1da177e4 | 738 | |
90130268 | 739 | status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options); |
1da177e4 LT |
740 | *options &= 3; |
741 | ||
d550d98d | 742 | return status; |
1da177e4 LT |
743 | } |
744 | ||
745 | /* | |
746 | * Arg: | |
747 | * video : video bus device pointer | |
748 | * bios_flag : | |
749 | * 0. The system BIOS should NOT automatically switch(toggle) | |
750 | * the active display output. | |
751 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 752 | * active display output. No switch event. |
1da177e4 LT |
753 | * 2. The _DGS value should be locked. |
754 | * 3. The system BIOS should not automatically switch (toggle) the | |
755 | * active display output, but instead generate the display switch | |
756 | * event notify code. | |
757 | * lcd_flag : | |
758 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 759 | * of the LCD when the power changes from AC to DC |
1da177e4 | 760 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 761 | * level of the LCD when the power changes from AC to DC. |
1da177e4 LT |
762 | * Return Value: |
763 | * -1 wrong arg. | |
764 | */ | |
765 | ||
766 | static int | |
4be44fcd | 767 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 768 | { |
439913ff | 769 | u64 status = 0; |
4be44fcd LB |
770 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
771 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 772 | |
1da177e4 | 773 | |
4be44fcd | 774 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) { |
1da177e4 LT |
775 | status = -1; |
776 | goto Failed; | |
777 | } | |
778 | arg0.integer.value = (lcd_flag << 2) | bios_flag; | |
779 | video->dos_setting = arg0.integer.value; | |
90130268 | 780 | acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL); |
1da177e4 | 781 | |
4be44fcd | 782 | Failed: |
d550d98d | 783 | return status; |
1da177e4 LT |
784 | } |
785 | ||
935e5f29 ZR |
786 | /* |
787 | * Simple comparison function used to sort backlight levels. | |
788 | */ | |
789 | ||
790 | static int | |
791 | acpi_video_cmp_level(const void *a, const void *b) | |
792 | { | |
793 | return *(int *)a - *(int *)b; | |
794 | } | |
795 | ||
1da177e4 LT |
796 | /* |
797 | * Arg: | |
798 | * device : video output device (LCD, CRT, ..) | |
799 | * | |
800 | * Return Value: | |
469778c1 JJ |
801 | * Maximum brightness level |
802 | * | |
803 | * Allocate and initialize device->brightness. | |
804 | */ | |
805 | ||
806 | static int | |
807 | acpi_video_init_brightness(struct acpi_video_device *device) | |
808 | { | |
809 | union acpi_object *obj = NULL; | |
d32f6947 | 810 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 811 | unsigned long long level, level_old; |
469778c1 JJ |
812 | union acpi_object *o; |
813 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 814 | int result = -EINVAL; |
469778c1 JJ |
815 | |
816 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
817 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
818 | "LCD brightness level\n")); | |
819 | goto out; | |
820 | } | |
821 | ||
822 | if (obj->package.count < 2) | |
823 | goto out; | |
824 | ||
825 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
826 | if (!br) { | |
827 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 828 | result = -ENOMEM; |
469778c1 JJ |
829 | goto out; |
830 | } | |
831 | ||
d32f6947 | 832 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 833 | GFP_KERNEL); |
1a7c618a ZR |
834 | if (!br->levels) { |
835 | result = -ENOMEM; | |
469778c1 | 836 | goto out_free; |
1a7c618a | 837 | } |
469778c1 JJ |
838 | |
839 | for (i = 0; i < obj->package.count; i++) { | |
840 | o = (union acpi_object *)&obj->package.elements[i]; | |
841 | if (o->type != ACPI_TYPE_INTEGER) { | |
842 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
843 | continue; | |
844 | } | |
845 | br->levels[count] = (u32) o->integer.value; | |
846 | ||
847 | if (br->levels[count] > max_level) | |
848 | max_level = br->levels[count]; | |
849 | count++; | |
850 | } | |
851 | ||
d32f6947 ZR |
852 | /* |
853 | * some buggy BIOS don't export the levels | |
854 | * when machine is on AC/Battery in _BCL package. | |
855 | * In this case, the first two elements in _BCL packages | |
856 | * are also supported brightness levels that OS should take care of. | |
857 | */ | |
90af2cf6 ZR |
858 | for (i = 2; i < count; i++) { |
859 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 860 | level_ac_battery++; |
90af2cf6 ZR |
861 | if (br->levels[i] == br->levels[1]) |
862 | level_ac_battery++; | |
863 | } | |
d32f6947 ZR |
864 | |
865 | if (level_ac_battery < 2) { | |
866 | level_ac_battery = 2 - level_ac_battery; | |
867 | br->flags._BCL_no_ac_battery_levels = 1; | |
868 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
869 | br->levels[i] = br->levels[i - level_ac_battery]; | |
870 | count += level_ac_battery; | |
871 | } else if (level_ac_battery > 2) | |
872 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n")); | |
873 | ||
d80fb99f ZR |
874 | /* Check if the _BCL package is in a reversed order */ |
875 | if (max_level == br->levels[2]) { | |
876 | br->flags._BCL_reversed = 1; | |
877 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
878 | acpi_video_cmp_level, NULL); | |
879 | } else if (max_level != br->levels[count - 1]) | |
880 | ACPI_ERROR((AE_INFO, | |
881 | "Found unordered _BCL package\n")); | |
469778c1 JJ |
882 | |
883 | br->count = count; | |
884 | device->brightness = br; | |
1a7c618a ZR |
885 | |
886 | /* Check the input/output of _BQC/_BCL/_BCM */ | |
887 | if ((max_level < 100) && (max_level <= (count - 2))) | |
888 | br->flags._BCL_use_index = 1; | |
889 | ||
890 | /* | |
891 | * _BCM is always consistent with _BCL, | |
892 | * at least for all the laptops we have ever seen. | |
893 | */ | |
894 | br->flags._BCM_use_index = br->flags._BCL_use_index; | |
895 | ||
896 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ | |
90c53ca4 | 897 | br->curr = level = max_level; |
e047cca6 ZR |
898 | |
899 | if (!device->cap._BQC) | |
900 | goto set_level; | |
901 | ||
70287db8 | 902 | result = acpi_video_device_lcd_get_level_current(device, &level_old, 1); |
1a7c618a ZR |
903 | if (result) |
904 | goto out_free_levels; | |
905 | ||
e047cca6 ZR |
906 | /* |
907 | * Set the level to maximum and check if _BQC uses indexed value | |
908 | */ | |
909 | result = acpi_video_device_lcd_set_level(device, max_level); | |
1a7c618a ZR |
910 | if (result) |
911 | goto out_free_levels; | |
912 | ||
70287db8 | 913 | result = acpi_video_device_lcd_get_level_current(device, &level, 0); |
1a7c618a ZR |
914 | if (result) |
915 | goto out_free_levels; | |
916 | ||
e047cca6 ZR |
917 | br->flags._BQC_use_index = (level == max_level ? 0 : 1); |
918 | ||
90c53ca4 ZR |
919 | if (!br->flags._BQC_use_index) { |
920 | /* | |
921 | * Set the backlight to the initial state. | |
922 | * On some buggy laptops, _BQC returns an uninitialized value | |
923 | * when invoked for the first time, i.e. level_old is invalid. | |
924 | * set the backlight to max_level in this case | |
925 | */ | |
926 | for (i = 2; i < br->count; i++) | |
927 | if (level_old == br->levels[i]) | |
928 | level = level_old; | |
e047cca6 | 929 | goto set_level; |
90c53ca4 | 930 | } |
e047cca6 ZR |
931 | |
932 | if (br->flags._BCL_reversed) | |
933 | level_old = (br->count - 1) - level_old; | |
90c53ca4 | 934 | level = br->levels[level_old]; |
e047cca6 ZR |
935 | |
936 | set_level: | |
90c53ca4 | 937 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
938 | if (result) |
939 | goto out_free_levels; | |
1a7c618a | 940 | |
d32f6947 ZR |
941 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
942 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 943 | kfree(obj); |
1a7c618a | 944 | return result; |
469778c1 JJ |
945 | |
946 | out_free_levels: | |
947 | kfree(br->levels); | |
948 | out_free: | |
949 | kfree(br); | |
950 | out: | |
951 | device->brightness = NULL; | |
952 | kfree(obj); | |
1a7c618a | 953 | return result; |
469778c1 JJ |
954 | } |
955 | ||
956 | /* | |
957 | * Arg: | |
958 | * device : video output device (LCD, CRT, ..) | |
959 | * | |
960 | * Return Value: | |
1da177e4 LT |
961 | * None |
962 | * | |
98fb8fe1 | 963 | * Find out all required AML methods defined under the output |
1da177e4 LT |
964 | * device. |
965 | */ | |
966 | ||
4be44fcd | 967 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 968 | { |
1da177e4 | 969 | acpi_handle h_dummy1; |
1da177e4 | 970 | |
90130268 | 971 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { |
1da177e4 LT |
972 | device->cap._ADR = 1; |
973 | } | |
90130268 | 974 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) { |
4be44fcd | 975 | device->cap._BCL = 1; |
1da177e4 | 976 | } |
90130268 | 977 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) { |
4be44fcd | 978 | device->cap._BCM = 1; |
1da177e4 | 979 | } |
2f3d000a YL |
980 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1))) |
981 | device->cap._BQC = 1; | |
c60d638e ZR |
982 | else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ", |
983 | &h_dummy1))) { | |
984 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); | |
985 | device->cap._BCQ = 1; | |
986 | } | |
987 | ||
90130268 | 988 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { |
4be44fcd | 989 | device->cap._DDC = 1; |
1da177e4 | 990 | } |
90130268 | 991 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) { |
1da177e4 LT |
992 | device->cap._DCS = 1; |
993 | } | |
90130268 | 994 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) { |
1da177e4 LT |
995 | device->cap._DGS = 1; |
996 | } | |
90130268 | 997 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) { |
1da177e4 LT |
998 | device->cap._DSS = 1; |
999 | } | |
1000 | ||
1a7c618a | 1001 | if (acpi_video_backlight_support()) { |
a19a6ee6 | 1002 | struct backlight_properties props; |
702ed512 | 1003 | int result; |
2f3d000a YL |
1004 | static int count = 0; |
1005 | char *name; | |
1a7c618a ZR |
1006 | |
1007 | result = acpi_video_init_brightness(device); | |
1008 | if (result) | |
1009 | return; | |
2f3d000a YL |
1010 | name = kzalloc(MAX_NAME_LEN, GFP_KERNEL); |
1011 | if (!name) | |
1012 | return; | |
1013 | ||
2f3d000a | 1014 | sprintf(name, "acpi_video%d", count++); |
a19a6ee6 MG |
1015 | memset(&props, 0, sizeof(struct backlight_properties)); |
1016 | props.max_brightness = device->brightness->count - 3; | |
1017 | device->backlight = backlight_device_register(name, NULL, device, | |
1018 | &acpi_backlight_ops, | |
1019 | &props); | |
2f3d000a | 1020 | kfree(name); |
e01ce79b ZR |
1021 | if (IS_ERR(device->backlight)) |
1022 | return; | |
702ed512 | 1023 | |
056c308d ZR |
1024 | result = sysfs_create_link(&device->backlight->dev.kobj, |
1025 | &device->dev->dev.kobj, "device"); | |
1026 | if (result) | |
1027 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1028 | ||
4a703a8f | 1029 | device->cooling_dev = thermal_cooling_device_register("LCD", |
702ed512 | 1030 | device->dev, &video_cooling_ops); |
4a703a8f | 1031 | if (IS_ERR(device->cooling_dev)) { |
4b4fe3b6 | 1032 | /* |
4a703a8f | 1033 | * Set cooling_dev to NULL so we don't crash trying to |
4b4fe3b6 DT |
1034 | * free it. |
1035 | * Also, why the hell we are returning early and | |
1036 | * not attempt to register video output if cooling | |
1037 | * device registration failed? | |
1038 | * -- dtor | |
1039 | */ | |
4a703a8f | 1040 | device->cooling_dev = NULL; |
43ff39f2 | 1041 | return; |
4b4fe3b6 | 1042 | } |
43ff39f2 | 1043 | |
fc3a8828 | 1044 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
4a703a8f | 1045 | device->cooling_dev->id); |
9030062f | 1046 | result = sysfs_create_link(&device->dev->dev.kobj, |
4a703a8f | 1047 | &device->cooling_dev->device.kobj, |
9030062f JL |
1048 | "thermal_cooling"); |
1049 | if (result) | |
1050 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
4a703a8f | 1051 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
9030062f JL |
1052 | &device->dev->dev.kobj, "device"); |
1053 | if (result) | |
1054 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1055 | ||
2f3d000a | 1056 | } |
c3d6de69 TR |
1057 | |
1058 | if (acpi_video_display_switch_support()) { | |
1059 | ||
1060 | if (device->cap._DCS && device->cap._DSS) { | |
1061 | static int count; | |
1062 | char *name; | |
1063 | name = kzalloc(MAX_NAME_LEN, GFP_KERNEL); | |
1064 | if (!name) | |
1065 | return; | |
1066 | sprintf(name, "acpi_video%d", count++); | |
1067 | device->output_dev = video_output_register(name, | |
1068 | NULL, device, &acpi_output_properties); | |
1069 | kfree(name); | |
1070 | } | |
23b0f015 | 1071 | } |
1da177e4 LT |
1072 | } |
1073 | ||
1074 | /* | |
1075 | * Arg: | |
1076 | * device : video output device (VGA) | |
1077 | * | |
1078 | * Return Value: | |
1079 | * None | |
1080 | * | |
98fb8fe1 | 1081 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
1082 | */ |
1083 | ||
4be44fcd | 1084 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1085 | { |
4be44fcd | 1086 | acpi_handle h_dummy1; |
1da177e4 | 1087 | |
90130268 | 1088 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { |
1da177e4 LT |
1089 | video->cap._DOS = 1; |
1090 | } | |
90130268 | 1091 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { |
1da177e4 LT |
1092 | video->cap._DOD = 1; |
1093 | } | |
90130268 | 1094 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { |
1da177e4 LT |
1095 | video->cap._ROM = 1; |
1096 | } | |
90130268 | 1097 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { |
1da177e4 LT |
1098 | video->cap._GPD = 1; |
1099 | } | |
90130268 | 1100 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { |
1da177e4 LT |
1101 | video->cap._SPD = 1; |
1102 | } | |
90130268 | 1103 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) { |
1da177e4 LT |
1104 | video->cap._VPO = 1; |
1105 | } | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Check whether the video bus device has required AML method to | |
1110 | * support the desired features | |
1111 | */ | |
1112 | ||
4be44fcd | 1113 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1114 | { |
4be44fcd | 1115 | acpi_status status = -ENOENT; |
1e4cffe7 | 1116 | struct pci_dev *dev; |
1da177e4 LT |
1117 | |
1118 | if (!video) | |
d550d98d | 1119 | return -EINVAL; |
1da177e4 | 1120 | |
1e4cffe7 | 1121 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1122 | if (!dev) |
1123 | return -ENODEV; | |
1e4cffe7 | 1124 | pci_dev_put(dev); |
22c13f9d | 1125 | |
1da177e4 LT |
1126 | /* Since there is no HID, CID and so on for VGA driver, we have |
1127 | * to check well known required nodes. | |
1128 | */ | |
1129 | ||
98fb8fe1 | 1130 | /* Does this device support video switching? */ |
3a1151e3 SB |
1131 | if (video->cap._DOS || video->cap._DOD) { |
1132 | if (!video->cap._DOS) { | |
1133 | printk(KERN_WARNING FW_BUG | |
1134 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1135 | acpi_device_bid(video->device)); | |
1136 | } | |
1da177e4 LT |
1137 | video->flags.multihead = 1; |
1138 | status = 0; | |
1139 | } | |
1140 | ||
98fb8fe1 | 1141 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1142 | if (video->cap._ROM) { |
1da177e4 LT |
1143 | video->flags.rom = 1; |
1144 | status = 0; | |
1145 | } | |
1146 | ||
98fb8fe1 | 1147 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1148 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1149 | video->flags.post = 1; |
1150 | status = 0; | |
1151 | } | |
1152 | ||
d550d98d | 1153 | return status; |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | /* -------------------------------------------------------------------------- | |
1157 | FS Interface (/proc) | |
1158 | -------------------------------------------------------------------------- */ | |
1159 | ||
4be44fcd | 1160 | static struct proc_dir_entry *acpi_video_dir; |
1da177e4 LT |
1161 | |
1162 | /* video devices */ | |
1163 | ||
4be44fcd | 1164 | static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1165 | { |
50dd0969 | 1166 | struct acpi_video_device *dev = seq->private; |
1da177e4 | 1167 | |
1da177e4 LT |
1168 | |
1169 | if (!dev) | |
1170 | goto end; | |
1171 | ||
1172 | seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id); | |
1173 | seq_printf(seq, "type: "); | |
1174 | if (dev->flags.crt) | |
1175 | seq_printf(seq, "CRT\n"); | |
1176 | else if (dev->flags.lcd) | |
1177 | seq_printf(seq, "LCD\n"); | |
1178 | else if (dev->flags.tvout) | |
1179 | seq_printf(seq, "TVOUT\n"); | |
82cae999 RZ |
1180 | else if (dev->flags.dvi) |
1181 | seq_printf(seq, "DVI\n"); | |
1da177e4 LT |
1182 | else |
1183 | seq_printf(seq, "UNKNOWN\n"); | |
1184 | ||
4be44fcd | 1185 | seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no"); |
1da177e4 | 1186 | |
4be44fcd | 1187 | end: |
d550d98d | 1188 | return 0; |
1da177e4 LT |
1189 | } |
1190 | ||
1191 | static int | |
4be44fcd | 1192 | acpi_video_device_info_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1193 | { |
1194 | return single_open(file, acpi_video_device_info_seq_show, | |
1195 | PDE(inode)->data); | |
1196 | } | |
1197 | ||
4be44fcd | 1198 | static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1199 | { |
4be44fcd | 1200 | int status; |
50dd0969 | 1201 | struct acpi_video_device *dev = seq->private; |
27663c58 | 1202 | unsigned long long state; |
1da177e4 | 1203 | |
1da177e4 LT |
1204 | |
1205 | if (!dev) | |
1206 | goto end; | |
1207 | ||
1208 | status = acpi_video_device_get_state(dev, &state); | |
1209 | seq_printf(seq, "state: "); | |
1210 | if (ACPI_SUCCESS(status)) | |
27663c58 | 1211 | seq_printf(seq, "0x%02llx\n", state); |
1da177e4 LT |
1212 | else |
1213 | seq_printf(seq, "<not supported>\n"); | |
1214 | ||
1215 | status = acpi_video_device_query(dev, &state); | |
1216 | seq_printf(seq, "query: "); | |
1217 | if (ACPI_SUCCESS(status)) | |
27663c58 | 1218 | seq_printf(seq, "0x%02llx\n", state); |
1da177e4 LT |
1219 | else |
1220 | seq_printf(seq, "<not supported>\n"); | |
1221 | ||
4be44fcd | 1222 | end: |
d550d98d | 1223 | return 0; |
1da177e4 LT |
1224 | } |
1225 | ||
1226 | static int | |
4be44fcd | 1227 | acpi_video_device_state_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1228 | { |
1229 | return single_open(file, acpi_video_device_state_seq_show, | |
1230 | PDE(inode)->data); | |
1231 | } | |
1232 | ||
1233 | static ssize_t | |
4be44fcd LB |
1234 | acpi_video_device_write_state(struct file *file, |
1235 | const char __user * buffer, | |
1236 | size_t count, loff_t * data) | |
1da177e4 | 1237 | { |
4be44fcd | 1238 | int status; |
50dd0969 JE |
1239 | struct seq_file *m = file->private_data; |
1240 | struct acpi_video_device *dev = m->private; | |
4be44fcd LB |
1241 | char str[12] = { 0 }; |
1242 | u32 state = 0; | |
1da177e4 | 1243 | |
1da177e4 | 1244 | |
52a2b11c | 1245 | if (!dev || count >= sizeof(str)) |
d550d98d | 1246 | return -EINVAL; |
1da177e4 LT |
1247 | |
1248 | if (copy_from_user(str, buffer, count)) | |
d550d98d | 1249 | return -EFAULT; |
1da177e4 LT |
1250 | |
1251 | str[count] = 0; | |
1252 | state = simple_strtoul(str, NULL, 0); | |
4be44fcd | 1253 | state &= ((1ul << 31) | (1ul << 30) | (1ul << 0)); |
1da177e4 LT |
1254 | |
1255 | status = acpi_video_device_set_state(dev, state); | |
1256 | ||
1257 | if (status) | |
d550d98d | 1258 | return -EFAULT; |
1da177e4 | 1259 | |
d550d98d | 1260 | return count; |
1da177e4 LT |
1261 | } |
1262 | ||
1263 | static int | |
4be44fcd | 1264 | acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1265 | { |
50dd0969 | 1266 | struct acpi_video_device *dev = seq->private; |
4be44fcd | 1267 | int i; |
1da177e4 | 1268 | |
1da177e4 LT |
1269 | |
1270 | if (!dev || !dev->brightness) { | |
1271 | seq_printf(seq, "<not supported>\n"); | |
d550d98d | 1272 | return 0; |
1da177e4 LT |
1273 | } |
1274 | ||
1275 | seq_printf(seq, "levels: "); | |
0a3db1ce | 1276 | for (i = 2; i < dev->brightness->count; i++) |
1da177e4 LT |
1277 | seq_printf(seq, " %d", dev->brightness->levels[i]); |
1278 | seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr); | |
1279 | ||
d550d98d | 1280 | return 0; |
1da177e4 LT |
1281 | } |
1282 | ||
1283 | static int | |
4be44fcd | 1284 | acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1285 | { |
1286 | return single_open(file, acpi_video_device_brightness_seq_show, | |
1287 | PDE(inode)->data); | |
1288 | } | |
1289 | ||
1290 | static ssize_t | |
4be44fcd LB |
1291 | acpi_video_device_write_brightness(struct file *file, |
1292 | const char __user * buffer, | |
1293 | size_t count, loff_t * data) | |
1da177e4 | 1294 | { |
50dd0969 JE |
1295 | struct seq_file *m = file->private_data; |
1296 | struct acpi_video_device *dev = m->private; | |
c88c5786 | 1297 | char str[5] = { 0 }; |
4be44fcd LB |
1298 | unsigned int level = 0; |
1299 | int i; | |
1da177e4 | 1300 | |
1da177e4 | 1301 | |
52a2b11c | 1302 | if (!dev || !dev->brightness || count >= sizeof(str)) |
d550d98d | 1303 | return -EINVAL; |
1da177e4 LT |
1304 | |
1305 | if (copy_from_user(str, buffer, count)) | |
d550d98d | 1306 | return -EFAULT; |
1da177e4 LT |
1307 | |
1308 | str[count] = 0; | |
1309 | level = simple_strtoul(str, NULL, 0); | |
4be44fcd | 1310 | |
1da177e4 | 1311 | if (level > 100) |
d550d98d | 1312 | return -EFAULT; |
1da177e4 | 1313 | |
98fb8fe1 | 1314 | /* validate through the list of available levels */ |
0a3db1ce | 1315 | for (i = 2; i < dev->brightness->count; i++) |
1da177e4 | 1316 | if (level == dev->brightness->levels[i]) { |
24450c7a ZR |
1317 | if (!acpi_video_device_lcd_set_level(dev, level)) |
1318 | return count; | |
1da177e4 LT |
1319 | break; |
1320 | } | |
1321 | ||
24450c7a | 1322 | return -EINVAL; |
1da177e4 LT |
1323 | } |
1324 | ||
4be44fcd | 1325 | static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1326 | { |
50dd0969 | 1327 | struct acpi_video_device *dev = seq->private; |
4be44fcd LB |
1328 | int status; |
1329 | int i; | |
1330 | union acpi_object *edid = NULL; | |
1da177e4 | 1331 | |
1da177e4 LT |
1332 | |
1333 | if (!dev) | |
1334 | goto out; | |
1335 | ||
4be44fcd | 1336 | status = acpi_video_device_EDID(dev, &edid, 128); |
1da177e4 | 1337 | if (ACPI_FAILURE(status)) { |
4be44fcd | 1338 | status = acpi_video_device_EDID(dev, &edid, 256); |
1da177e4 LT |
1339 | } |
1340 | ||
1341 | if (ACPI_FAILURE(status)) { | |
1342 | goto out; | |
1343 | } | |
1344 | ||
1345 | if (edid && edid->type == ACPI_TYPE_BUFFER) { | |
1346 | for (i = 0; i < edid->buffer.length; i++) | |
1347 | seq_putc(seq, edid->buffer.pointer[i]); | |
1348 | } | |
1349 | ||
4be44fcd | 1350 | out: |
1da177e4 LT |
1351 | if (!edid) |
1352 | seq_printf(seq, "<not supported>\n"); | |
1353 | else | |
1354 | kfree(edid); | |
1355 | ||
d550d98d | 1356 | return 0; |
1da177e4 LT |
1357 | } |
1358 | ||
1359 | static int | |
4be44fcd | 1360 | acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1361 | { |
1362 | return single_open(file, acpi_video_device_EDID_seq_show, | |
1363 | PDE(inode)->data); | |
1364 | } | |
1365 | ||
4be44fcd | 1366 | static int acpi_video_device_add_fs(struct acpi_device *device) |
1da177e4 | 1367 | { |
251cb0bc | 1368 | struct proc_dir_entry *entry, *device_dir; |
1da177e4 LT |
1369 | struct acpi_video_device *vid_dev; |
1370 | ||
50dd0969 | 1371 | vid_dev = acpi_driver_data(device); |
1da177e4 | 1372 | if (!vid_dev) |
d550d98d | 1373 | return -ENODEV; |
1da177e4 | 1374 | |
251cb0bc DT |
1375 | device_dir = proc_mkdir(acpi_device_bid(device), |
1376 | vid_dev->video->dir); | |
1377 | if (!device_dir) | |
1378 | return -ENOMEM; | |
1379 | ||
1da177e4 | 1380 | /* 'info' [R] */ |
e0066c4e | 1381 | entry = proc_create_data("info", S_IRUGO, device_dir, |
cf7acfab | 1382 | &acpi_video_device_info_fops, acpi_driver_data(device)); |
1da177e4 | 1383 | if (!entry) |
251cb0bc | 1384 | goto err_remove_dir; |
1da177e4 LT |
1385 | |
1386 | /* 'state' [R/W] */ | |
cf7acfab | 1387 | entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR, |
e0066c4e | 1388 | device_dir, |
cf7acfab DL |
1389 | &acpi_video_device_state_fops, |
1390 | acpi_driver_data(device)); | |
1da177e4 | 1391 | if (!entry) |
251cb0bc | 1392 | goto err_remove_info; |
1da177e4 LT |
1393 | |
1394 | /* 'brightness' [R/W] */ | |
cf7acfab | 1395 | entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR, |
e0066c4e | 1396 | device_dir, |
cf7acfab DL |
1397 | &acpi_video_device_brightness_fops, |
1398 | acpi_driver_data(device)); | |
1da177e4 | 1399 | if (!entry) |
251cb0bc | 1400 | goto err_remove_state; |
1da177e4 LT |
1401 | |
1402 | /* 'EDID' [R] */ | |
e0066c4e | 1403 | entry = proc_create_data("EDID", S_IRUGO, device_dir, |
cf7acfab DL |
1404 | &acpi_video_device_EDID_fops, |
1405 | acpi_driver_data(device)); | |
1da177e4 | 1406 | if (!entry) |
251cb0bc | 1407 | goto err_remove_brightness; |
1da177e4 | 1408 | |
e0066c4e AD |
1409 | acpi_device_dir(device) = device_dir; |
1410 | ||
d550d98d | 1411 | return 0; |
251cb0bc DT |
1412 | |
1413 | err_remove_brightness: | |
1414 | remove_proc_entry("brightness", device_dir); | |
1415 | err_remove_state: | |
1416 | remove_proc_entry("state", device_dir); | |
1417 | err_remove_info: | |
1418 | remove_proc_entry("info", device_dir); | |
1419 | err_remove_dir: | |
1420 | remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir); | |
1421 | return -ENOMEM; | |
1da177e4 LT |
1422 | } |
1423 | ||
4be44fcd | 1424 | static int acpi_video_device_remove_fs(struct acpi_device *device) |
1da177e4 LT |
1425 | { |
1426 | struct acpi_video_device *vid_dev; | |
251cb0bc | 1427 | struct proc_dir_entry *device_dir; |
1da177e4 | 1428 | |
50dd0969 | 1429 | vid_dev = acpi_driver_data(device); |
1da177e4 | 1430 | if (!vid_dev || !vid_dev->video || !vid_dev->video->dir) |
d550d98d | 1431 | return -ENODEV; |
1da177e4 | 1432 | |
251cb0bc DT |
1433 | device_dir = acpi_device_dir(device); |
1434 | if (device_dir) { | |
1435 | remove_proc_entry("info", device_dir); | |
1436 | remove_proc_entry("state", device_dir); | |
1437 | remove_proc_entry("brightness", device_dir); | |
1438 | remove_proc_entry("EDID", device_dir); | |
4be44fcd | 1439 | remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir); |
1da177e4 LT |
1440 | acpi_device_dir(device) = NULL; |
1441 | } | |
1442 | ||
d550d98d | 1443 | return 0; |
1da177e4 LT |
1444 | } |
1445 | ||
1da177e4 | 1446 | /* video bus */ |
4be44fcd | 1447 | static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1448 | { |
50dd0969 | 1449 | struct acpi_video_bus *video = seq->private; |
1da177e4 | 1450 | |
1da177e4 LT |
1451 | |
1452 | if (!video) | |
1453 | goto end; | |
1454 | ||
1455 | seq_printf(seq, "Switching heads: %s\n", | |
4be44fcd | 1456 | video->flags.multihead ? "yes" : "no"); |
1da177e4 | 1457 | seq_printf(seq, "Video ROM: %s\n", |
4be44fcd | 1458 | video->flags.rom ? "yes" : "no"); |
1da177e4 | 1459 | seq_printf(seq, "Device to be POSTed on boot: %s\n", |
4be44fcd | 1460 | video->flags.post ? "yes" : "no"); |
1da177e4 | 1461 | |
4be44fcd | 1462 | end: |
d550d98d | 1463 | return 0; |
1da177e4 LT |
1464 | } |
1465 | ||
4be44fcd | 1466 | static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 1467 | { |
4be44fcd LB |
1468 | return single_open(file, acpi_video_bus_info_seq_show, |
1469 | PDE(inode)->data); | |
1da177e4 LT |
1470 | } |
1471 | ||
4be44fcd | 1472 | static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1473 | { |
50dd0969 | 1474 | struct acpi_video_bus *video = seq->private; |
1da177e4 | 1475 | |
1da177e4 LT |
1476 | |
1477 | if (!video) | |
1478 | goto end; | |
1479 | ||
96b2dd1f | 1480 | printk(KERN_INFO PREFIX "Please implement %s\n", __func__); |
1da177e4 LT |
1481 | seq_printf(seq, "<TODO>\n"); |
1482 | ||
4be44fcd | 1483 | end: |
d550d98d | 1484 | return 0; |
1da177e4 LT |
1485 | } |
1486 | ||
4be44fcd | 1487 | static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1488 | { |
1489 | return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data); | |
1490 | } | |
1491 | ||
4be44fcd | 1492 | static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1493 | { |
50dd0969 | 1494 | struct acpi_video_bus *video = seq->private; |
27663c58 | 1495 | unsigned long long options; |
4be44fcd | 1496 | int status; |
1da177e4 | 1497 | |
1da177e4 LT |
1498 | |
1499 | if (!video) | |
1500 | goto end; | |
1501 | ||
1502 | status = acpi_video_bus_POST_options(video, &options); | |
1503 | if (ACPI_SUCCESS(status)) { | |
1504 | if (!(options & 1)) { | |
4be44fcd LB |
1505 | printk(KERN_WARNING PREFIX |
1506 | "The motherboard VGA device is not listed as a possible POST device.\n"); | |
1507 | printk(KERN_WARNING PREFIX | |
98fb8fe1 | 1508 | "This indicates a BIOS bug. Please contact the manufacturer.\n"); |
1da177e4 | 1509 | } |
4d939155 | 1510 | printk(KERN_WARNING "%llx\n", options); |
98fb8fe1 | 1511 | seq_printf(seq, "can POST: <integrated video>"); |
1da177e4 LT |
1512 | if (options & 2) |
1513 | seq_printf(seq, " <PCI video>"); | |
1514 | if (options & 4) | |
1515 | seq_printf(seq, " <AGP video>"); | |
1516 | seq_putc(seq, '\n'); | |
1517 | } else | |
1518 | seq_printf(seq, "<not supported>\n"); | |
4be44fcd | 1519 | end: |
d550d98d | 1520 | return 0; |
1da177e4 LT |
1521 | } |
1522 | ||
1523 | static int | |
4be44fcd | 1524 | acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 1525 | { |
4be44fcd LB |
1526 | return single_open(file, acpi_video_bus_POST_info_seq_show, |
1527 | PDE(inode)->data); | |
1da177e4 LT |
1528 | } |
1529 | ||
4be44fcd | 1530 | static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1531 | { |
50dd0969 | 1532 | struct acpi_video_bus *video = seq->private; |
4be44fcd | 1533 | int status; |
27663c58 | 1534 | unsigned long long id; |
1da177e4 | 1535 | |
1da177e4 LT |
1536 | |
1537 | if (!video) | |
1538 | goto end; | |
1539 | ||
4be44fcd | 1540 | status = acpi_video_bus_get_POST(video, &id); |
1da177e4 LT |
1541 | if (!ACPI_SUCCESS(status)) { |
1542 | seq_printf(seq, "<not supported>\n"); | |
1543 | goto end; | |
1544 | } | |
98fb8fe1 | 1545 | seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]); |
1da177e4 | 1546 | |
4be44fcd | 1547 | end: |
d550d98d | 1548 | return 0; |
1da177e4 LT |
1549 | } |
1550 | ||
4be44fcd | 1551 | static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset) |
1da177e4 | 1552 | { |
50dd0969 | 1553 | struct acpi_video_bus *video = seq->private; |
1da177e4 | 1554 | |
1da177e4 | 1555 | |
4be44fcd | 1556 | seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting); |
1da177e4 | 1557 | |
d550d98d | 1558 | return 0; |
1da177e4 LT |
1559 | } |
1560 | ||
4be44fcd | 1561 | static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 1562 | { |
4be44fcd LB |
1563 | return single_open(file, acpi_video_bus_POST_seq_show, |
1564 | PDE(inode)->data); | |
1da177e4 LT |
1565 | } |
1566 | ||
4be44fcd | 1567 | static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file) |
1da177e4 LT |
1568 | { |
1569 | return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data); | |
1570 | } | |
1571 | ||
1572 | static ssize_t | |
4be44fcd LB |
1573 | acpi_video_bus_write_POST(struct file *file, |
1574 | const char __user * buffer, | |
1575 | size_t count, loff_t * data) | |
1da177e4 | 1576 | { |
4be44fcd | 1577 | int status; |
50dd0969 JE |
1578 | struct seq_file *m = file->private_data; |
1579 | struct acpi_video_bus *video = m->private; | |
4be44fcd | 1580 | char str[12] = { 0 }; |
27663c58 | 1581 | unsigned long long opt, options; |
1da177e4 | 1582 | |
1da177e4 | 1583 | |
52a2b11c | 1584 | if (!video || count >= sizeof(str)) |
d550d98d | 1585 | return -EINVAL; |
1da177e4 LT |
1586 | |
1587 | status = acpi_video_bus_POST_options(video, &options); | |
1588 | if (!ACPI_SUCCESS(status)) | |
d550d98d | 1589 | return -EINVAL; |
1da177e4 LT |
1590 | |
1591 | if (copy_from_user(str, buffer, count)) | |
d550d98d | 1592 | return -EFAULT; |
1da177e4 LT |
1593 | |
1594 | str[count] = 0; | |
1595 | opt = strtoul(str, NULL, 0); | |
1596 | if (opt > 3) | |
d550d98d | 1597 | return -EFAULT; |
1da177e4 | 1598 | |
98fb8fe1 | 1599 | /* just in case an OEM 'forgot' the motherboard... */ |
1da177e4 LT |
1600 | options |= 1; |
1601 | ||
1602 | if (options & (1ul << opt)) { | |
4be44fcd | 1603 | status = acpi_video_bus_set_POST(video, opt); |
1da177e4 | 1604 | if (!ACPI_SUCCESS(status)) |
d550d98d | 1605 | return -EFAULT; |
1da177e4 LT |
1606 | |
1607 | } | |
1608 | ||
d550d98d | 1609 | return count; |
1da177e4 LT |
1610 | } |
1611 | ||
1612 | static ssize_t | |
4be44fcd LB |
1613 | acpi_video_bus_write_DOS(struct file *file, |
1614 | const char __user * buffer, | |
1615 | size_t count, loff_t * data) | |
1da177e4 | 1616 | { |
4be44fcd | 1617 | int status; |
50dd0969 JE |
1618 | struct seq_file *m = file->private_data; |
1619 | struct acpi_video_bus *video = m->private; | |
4be44fcd LB |
1620 | char str[12] = { 0 }; |
1621 | unsigned long opt; | |
1da177e4 | 1622 | |
1da177e4 | 1623 | |
52a2b11c | 1624 | if (!video || count >= sizeof(str)) |
d550d98d | 1625 | return -EINVAL; |
1da177e4 LT |
1626 | |
1627 | if (copy_from_user(str, buffer, count)) | |
d550d98d | 1628 | return -EFAULT; |
1da177e4 LT |
1629 | |
1630 | str[count] = 0; | |
1631 | opt = strtoul(str, NULL, 0); | |
1632 | if (opt > 7) | |
d550d98d | 1633 | return -EFAULT; |
1da177e4 | 1634 | |
4be44fcd | 1635 | status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2); |
1da177e4 LT |
1636 | |
1637 | if (!ACPI_SUCCESS(status)) | |
d550d98d | 1638 | return -EFAULT; |
1da177e4 | 1639 | |
d550d98d | 1640 | return count; |
1da177e4 LT |
1641 | } |
1642 | ||
4be44fcd | 1643 | static int acpi_video_bus_add_fs(struct acpi_device *device) |
1da177e4 | 1644 | { |
251cb0bc DT |
1645 | struct acpi_video_bus *video = acpi_driver_data(device); |
1646 | struct proc_dir_entry *device_dir; | |
1647 | struct proc_dir_entry *entry; | |
1da177e4 | 1648 | |
251cb0bc DT |
1649 | device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir); |
1650 | if (!device_dir) | |
1651 | return -ENOMEM; | |
1da177e4 | 1652 | |
1da177e4 | 1653 | /* 'info' [R] */ |
e0066c4e | 1654 | entry = proc_create_data("info", S_IRUGO, device_dir, |
cf7acfab DL |
1655 | &acpi_video_bus_info_fops, |
1656 | acpi_driver_data(device)); | |
1da177e4 | 1657 | if (!entry) |
251cb0bc | 1658 | goto err_remove_dir; |
1da177e4 LT |
1659 | |
1660 | /* 'ROM' [R] */ | |
e0066c4e | 1661 | entry = proc_create_data("ROM", S_IRUGO, device_dir, |
cf7acfab DL |
1662 | &acpi_video_bus_ROM_fops, |
1663 | acpi_driver_data(device)); | |
1da177e4 | 1664 | if (!entry) |
251cb0bc | 1665 | goto err_remove_info; |
1da177e4 LT |
1666 | |
1667 | /* 'POST_info' [R] */ | |
e0066c4e | 1668 | entry = proc_create_data("POST_info", S_IRUGO, device_dir, |
cf7acfab DL |
1669 | &acpi_video_bus_POST_info_fops, |
1670 | acpi_driver_data(device)); | |
1da177e4 | 1671 | if (!entry) |
251cb0bc | 1672 | goto err_remove_rom; |
1da177e4 LT |
1673 | |
1674 | /* 'POST' [R/W] */ | |
08acd4f8 | 1675 | entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR, |
e0066c4e | 1676 | device_dir, |
cf7acfab DL |
1677 | &acpi_video_bus_POST_fops, |
1678 | acpi_driver_data(device)); | |
1da177e4 | 1679 | if (!entry) |
251cb0bc | 1680 | goto err_remove_post_info; |
1da177e4 LT |
1681 | |
1682 | /* 'DOS' [R/W] */ | |
08acd4f8 | 1683 | entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR, |
e0066c4e | 1684 | device_dir, |
cf7acfab DL |
1685 | &acpi_video_bus_DOS_fops, |
1686 | acpi_driver_data(device)); | |
1da177e4 | 1687 | if (!entry) |
251cb0bc | 1688 | goto err_remove_post; |
1da177e4 | 1689 | |
251cb0bc | 1690 | video->dir = acpi_device_dir(device) = device_dir; |
d550d98d | 1691 | return 0; |
251cb0bc DT |
1692 | |
1693 | err_remove_post: | |
1694 | remove_proc_entry("POST", device_dir); | |
1695 | err_remove_post_info: | |
1696 | remove_proc_entry("POST_info", device_dir); | |
1697 | err_remove_rom: | |
1698 | remove_proc_entry("ROM", device_dir); | |
1699 | err_remove_info: | |
1700 | remove_proc_entry("info", device_dir); | |
1701 | err_remove_dir: | |
1702 | remove_proc_entry(acpi_device_bid(device), acpi_video_dir); | |
1703 | return -ENOMEM; | |
1da177e4 LT |
1704 | } |
1705 | ||
4be44fcd | 1706 | static int acpi_video_bus_remove_fs(struct acpi_device *device) |
1da177e4 | 1707 | { |
251cb0bc DT |
1708 | struct proc_dir_entry *device_dir = acpi_device_dir(device); |
1709 | ||
1710 | if (device_dir) { | |
1711 | remove_proc_entry("info", device_dir); | |
1712 | remove_proc_entry("ROM", device_dir); | |
1713 | remove_proc_entry("POST_info", device_dir); | |
1714 | remove_proc_entry("POST", device_dir); | |
1715 | remove_proc_entry("DOS", device_dir); | |
4be44fcd | 1716 | remove_proc_entry(acpi_device_bid(device), acpi_video_dir); |
1da177e4 LT |
1717 | acpi_device_dir(device) = NULL; |
1718 | } | |
1719 | ||
d550d98d | 1720 | return 0; |
1da177e4 LT |
1721 | } |
1722 | ||
1723 | /* -------------------------------------------------------------------------- | |
1724 | Driver Interface | |
1725 | -------------------------------------------------------------------------- */ | |
1726 | ||
1727 | /* device interface */ | |
82cae999 RZ |
1728 | static struct acpi_video_device_attrib* |
1729 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) | |
1730 | { | |
78eed028 DT |
1731 | struct acpi_video_enumerated_device *ids; |
1732 | int i; | |
1733 | ||
1734 | for (i = 0; i < video->attached_count; i++) { | |
1735 | ids = &video->attached_array[i]; | |
1736 | if ((ids->value.int_val & 0xffff) == device_id) | |
1737 | return &ids->value.attrib; | |
1738 | } | |
82cae999 | 1739 | |
82cae999 RZ |
1740 | return NULL; |
1741 | } | |
1da177e4 LT |
1742 | |
1743 | static int | |
4be44fcd LB |
1744 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1745 | struct acpi_video_bus *video) | |
1da177e4 | 1746 | { |
27663c58 | 1747 | unsigned long long device_id; |
973bf491 | 1748 | int status; |
4be44fcd | 1749 | struct acpi_video_device *data; |
82cae999 | 1750 | struct acpi_video_device_attrib* attribute; |
1da177e4 LT |
1751 | |
1752 | if (!device || !video) | |
d550d98d | 1753 | return -EINVAL; |
1da177e4 | 1754 | |
4be44fcd LB |
1755 | status = |
1756 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
1da177e4 LT |
1757 | if (ACPI_SUCCESS(status)) { |
1758 | ||
36bcbec7 | 1759 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1da177e4 | 1760 | if (!data) |
d550d98d | 1761 | return -ENOMEM; |
1da177e4 | 1762 | |
1da177e4 LT |
1763 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1764 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1765 | device->driver_data = data; |
1da177e4 LT |
1766 | |
1767 | data->device_id = device_id; | |
1768 | data->video = video; | |
1769 | data->dev = device; | |
1770 | ||
82cae999 RZ |
1771 | attribute = acpi_video_get_device_attr(video, device_id); |
1772 | ||
1773 | if((attribute != NULL) && attribute->device_id_scheme) { | |
1774 | switch (attribute->display_type) { | |
1775 | case ACPI_VIDEO_DISPLAY_CRT: | |
1776 | data->flags.crt = 1; | |
1777 | break; | |
1778 | case ACPI_VIDEO_DISPLAY_TV: | |
1779 | data->flags.tvout = 1; | |
1780 | break; | |
1781 | case ACPI_VIDEO_DISPLAY_DVI: | |
1782 | data->flags.dvi = 1; | |
1783 | break; | |
1784 | case ACPI_VIDEO_DISPLAY_LCD: | |
1785 | data->flags.lcd = 1; | |
1786 | break; | |
1787 | default: | |
1788 | data->flags.unknown = 1; | |
1789 | break; | |
1790 | } | |
1791 | if(attribute->bios_can_detect) | |
1792 | data->flags.bios = 1; | |
1793 | } else | |
1da177e4 | 1794 | data->flags.unknown = 1; |
4be44fcd | 1795 | |
1da177e4 LT |
1796 | acpi_video_device_bind(video, data); |
1797 | acpi_video_device_find_cap(data); | |
1798 | ||
90130268 | 1799 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1800 | ACPI_DEVICE_NOTIFY, |
1801 | acpi_video_device_notify, | |
1802 | data); | |
1da177e4 | 1803 | if (ACPI_FAILURE(status)) { |
55ac9a01 LM |
1804 | printk(KERN_ERR PREFIX |
1805 | "Error installing notify handler\n"); | |
973bf491 YL |
1806 | if(data->brightness) |
1807 | kfree(data->brightness->levels); | |
1808 | kfree(data->brightness); | |
1809 | kfree(data); | |
1810 | return -ENODEV; | |
1da177e4 LT |
1811 | } |
1812 | ||
bbac81f5 | 1813 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1814 | list_add_tail(&data->entry, &video->video_device_list); |
bbac81f5 | 1815 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1816 | |
1817 | acpi_video_device_add_fs(device); | |
1818 | ||
d550d98d | 1819 | return 0; |
1da177e4 LT |
1820 | } |
1821 | ||
d550d98d | 1822 | return -ENOENT; |
1da177e4 LT |
1823 | } |
1824 | ||
1825 | /* | |
1826 | * Arg: | |
1827 | * video : video bus device | |
1828 | * | |
1829 | * Return: | |
1830 | * none | |
1831 | * | |
1832 | * Enumerate the video device list of the video bus, | |
1833 | * bind the ids with the corresponding video devices | |
1834 | * under the video bus. | |
4be44fcd | 1835 | */ |
1da177e4 | 1836 | |
4be44fcd | 1837 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1838 | { |
ff102ea9 DT |
1839 | struct acpi_video_device *dev; |
1840 | ||
bbac81f5 | 1841 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1842 | |
1843 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1844 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1845 | |
bbac81f5 | 1846 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1847 | } |
1848 | ||
1849 | /* | |
1850 | * Arg: | |
1851 | * video : video bus device | |
1852 | * device : video output device under the video | |
1853 | * bus | |
1854 | * | |
1855 | * Return: | |
1856 | * none | |
1857 | * | |
1858 | * Bind the ids with the corresponding video devices | |
1859 | * under the video bus. | |
4be44fcd | 1860 | */ |
1da177e4 LT |
1861 | |
1862 | static void | |
4be44fcd LB |
1863 | acpi_video_device_bind(struct acpi_video_bus *video, |
1864 | struct acpi_video_device *device) | |
1da177e4 | 1865 | { |
78eed028 | 1866 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1867 | int i; |
1da177e4 | 1868 | |
78eed028 DT |
1869 | for (i = 0; i < video->attached_count; i++) { |
1870 | ids = &video->attached_array[i]; | |
1871 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1872 | ids->bind_info = device; | |
1da177e4 LT |
1873 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1874 | } | |
1875 | } | |
1da177e4 LT |
1876 | } |
1877 | ||
1878 | /* | |
1879 | * Arg: | |
1880 | * video : video bus device | |
1881 | * | |
1882 | * Return: | |
1883 | * < 0 : error | |
1884 | * | |
1885 | * Call _DOD to enumerate all devices attached to display adapter | |
1886 | * | |
4be44fcd | 1887 | */ |
1da177e4 LT |
1888 | |
1889 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1890 | { | |
4be44fcd LB |
1891 | int status; |
1892 | int count; | |
1893 | int i; | |
78eed028 | 1894 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1895 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1896 | union acpi_object *dod = NULL; | |
1897 | union acpi_object *obj; | |
1da177e4 | 1898 | |
90130268 | 1899 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1900 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1901 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1902 | return status; |
1da177e4 LT |
1903 | } |
1904 | ||
50dd0969 | 1905 | dod = buffer.pointer; |
1da177e4 | 1906 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1907 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1908 | status = -EFAULT; |
1909 | goto out; | |
1910 | } | |
1911 | ||
1912 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1913 | dod->package.count)); |
1da177e4 | 1914 | |
78eed028 DT |
1915 | active_list = kcalloc(1 + dod->package.count, |
1916 | sizeof(struct acpi_video_enumerated_device), | |
1917 | GFP_KERNEL); | |
1918 | if (!active_list) { | |
1da177e4 LT |
1919 | status = -ENOMEM; |
1920 | goto out; | |
1921 | } | |
1922 | ||
1923 | count = 0; | |
1924 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1925 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1926 | |
1927 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1928 | printk(KERN_ERR PREFIX |
1929 | "Invalid _DOD data in element %d\n", i); | |
1930 | continue; | |
1da177e4 | 1931 | } |
78eed028 DT |
1932 | |
1933 | active_list[count].value.int_val = obj->integer.value; | |
1934 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1935 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1936 | (int)obj->integer.value)); | |
1da177e4 LT |
1937 | count++; |
1938 | } | |
1da177e4 | 1939 | |
6044ec88 | 1940 | kfree(video->attached_array); |
4be44fcd | 1941 | |
78eed028 | 1942 | video->attached_array = active_list; |
1da177e4 | 1943 | video->attached_count = count; |
78eed028 DT |
1944 | |
1945 | out: | |
02438d87 | 1946 | kfree(buffer.pointer); |
d550d98d | 1947 | return status; |
1da177e4 LT |
1948 | } |
1949 | ||
4be44fcd LB |
1950 | static int |
1951 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1952 | u32 level_current, u32 event) | |
1da177e4 | 1953 | { |
63f0edfc | 1954 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1955 | max = max_below = 0; |
1956 | min = min_above = 255; | |
63f0edfc | 1957 | /* Find closest level to level_current */ |
0a3db1ce | 1958 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1959 | l = device->brightness->levels[i]; |
1960 | if (abs(l - level_current) < abs(delta)) { | |
1961 | delta = l - level_current; | |
1962 | if (!delta) | |
1963 | break; | |
1964 | } | |
1965 | } | |
1966 | /* Ajust level_current to closest available level */ | |
1967 | level_current += delta; | |
0a3db1ce | 1968 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1969 | l = device->brightness->levels[i]; |
1970 | if (l < min) | |
1971 | min = l; | |
1972 | if (l > max) | |
1973 | max = l; | |
1974 | if (l < min_above && l > level_current) | |
1975 | min_above = l; | |
1976 | if (l > max_below && l < level_current) | |
1977 | max_below = l; | |
1978 | } | |
1979 | ||
1980 | switch (event) { | |
1981 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1982 | return (level_current < max) ? min_above : min; | |
1983 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1984 | return (level_current < max) ? min_above : max; | |
1985 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1986 | return (level_current > min) ? max_below : min; | |
1987 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1988 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1989 | return 0; | |
1990 | default: | |
1991 | return level_current; | |
1992 | } | |
1da177e4 LT |
1993 | } |
1994 | ||
c8890f90 | 1995 | static int |
4be44fcd | 1996 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1997 | { |
27663c58 | 1998 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1999 | int result = -EINVAL; |
2000 | ||
28c32e99 ZR |
2001 | /* no warning message if acpi_backlight=vendor is used */ |
2002 | if (!acpi_video_backlight_support()) | |
2003 | return 0; | |
2004 | ||
469778c1 | 2005 | if (!device->brightness) |
c8890f90 ZR |
2006 | goto out; |
2007 | ||
2008 | result = acpi_video_device_lcd_get_level_current(device, | |
70287db8 | 2009 | &level_current, 0); |
c8890f90 ZR |
2010 | if (result) |
2011 | goto out; | |
2012 | ||
1da177e4 | 2013 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 2014 | |
24450c7a | 2015 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 2016 | |
36342742 MG |
2017 | if (!result) |
2018 | backlight_force_update(device->backlight, | |
2019 | BACKLIGHT_UPDATE_HOTKEY); | |
2020 | ||
c8890f90 ZR |
2021 | out: |
2022 | if (result) | |
2023 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
2024 | ||
2025 | return result; | |
1da177e4 LT |
2026 | } |
2027 | ||
2028 | static int | |
4be44fcd LB |
2029 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
2030 | struct acpi_device *device) | |
1da177e4 | 2031 | { |
4be44fcd | 2032 | int status = 0; |
ff102ea9 | 2033 | struct acpi_device *dev; |
1da177e4 LT |
2034 | |
2035 | acpi_video_device_enumerate(video); | |
2036 | ||
ff102ea9 | 2037 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
2038 | |
2039 | status = acpi_video_bus_get_one_device(dev, video); | |
2040 | if (ACPI_FAILURE(status)) { | |
55ac9a01 LM |
2041 | printk(KERN_WARNING PREFIX |
2042 | "Cant attach device"); | |
1da177e4 LT |
2043 | continue; |
2044 | } | |
1da177e4 | 2045 | } |
d550d98d | 2046 | return status; |
1da177e4 LT |
2047 | } |
2048 | ||
4be44fcd | 2049 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
1da177e4 | 2050 | { |
031ec77b | 2051 | acpi_status status; |
1da177e4 LT |
2052 | struct acpi_video_bus *video; |
2053 | ||
1da177e4 LT |
2054 | |
2055 | if (!device || !device->video) | |
d550d98d | 2056 | return -ENOENT; |
1da177e4 LT |
2057 | |
2058 | video = device->video; | |
2059 | ||
1da177e4 LT |
2060 | acpi_video_device_remove_fs(device->dev); |
2061 | ||
90130268 | 2062 | status = acpi_remove_notify_handler(device->dev->handle, |
4be44fcd LB |
2063 | ACPI_DEVICE_NOTIFY, |
2064 | acpi_video_device_notify); | |
e29b3ee3 KP |
2065 | if (device->backlight) { |
2066 | sysfs_remove_link(&device->backlight->dev.kobj, "device"); | |
2067 | backlight_device_unregister(device->backlight); | |
2068 | device->backlight = NULL; | |
2069 | } | |
4a703a8f | 2070 | if (device->cooling_dev) { |
702ed512 ZR |
2071 | sysfs_remove_link(&device->dev->dev.kobj, |
2072 | "thermal_cooling"); | |
4a703a8f | 2073 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
702ed512 | 2074 | "device"); |
4a703a8f DT |
2075 | thermal_cooling_device_unregister(device->cooling_dev); |
2076 | device->cooling_dev = NULL; | |
702ed512 | 2077 | } |
23b0f015 | 2078 | video_output_unregister(device->output_dev); |
ff102ea9 | 2079 | |
d550d98d | 2080 | return 0; |
1da177e4 LT |
2081 | } |
2082 | ||
4be44fcd | 2083 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1da177e4 | 2084 | { |
4be44fcd | 2085 | int status; |
ff102ea9 | 2086 | struct acpi_video_device *dev, *next; |
1da177e4 | 2087 | |
bbac81f5 | 2088 | mutex_lock(&video->device_list_lock); |
1da177e4 | 2089 | |
ff102ea9 | 2090 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
1da177e4 | 2091 | |
ff102ea9 | 2092 | status = acpi_video_bus_put_one_device(dev); |
4be44fcd LB |
2093 | if (ACPI_FAILURE(status)) |
2094 | printk(KERN_WARNING PREFIX | |
2095 | "hhuuhhuu bug in acpi video driver.\n"); | |
1da177e4 | 2096 | |
ff102ea9 DT |
2097 | if (dev->brightness) { |
2098 | kfree(dev->brightness->levels); | |
2099 | kfree(dev->brightness); | |
2100 | } | |
2101 | list_del(&dev->entry); | |
2102 | kfree(dev); | |
1da177e4 LT |
2103 | } |
2104 | ||
bbac81f5 | 2105 | mutex_unlock(&video->device_list_lock); |
ff102ea9 | 2106 | |
d550d98d | 2107 | return 0; |
1da177e4 LT |
2108 | } |
2109 | ||
2110 | /* acpi_video interface */ | |
2111 | ||
4be44fcd | 2112 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 2113 | { |
a21101c4 | 2114 | return acpi_video_bus_DOS(video, 0, 0); |
1da177e4 LT |
2115 | } |
2116 | ||
4be44fcd | 2117 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 LT |
2118 | { |
2119 | return acpi_video_bus_DOS(video, 0, 1); | |
2120 | } | |
2121 | ||
7015558f | 2122 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 2123 | { |
7015558f | 2124 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 LY |
2125 | struct input_dev *input; |
2126 | int keycode; | |
2127 | ||
1da177e4 | 2128 | if (!video) |
d550d98d | 2129 | return; |
1da177e4 | 2130 | |
e9dab196 | 2131 | input = video->input; |
1da177e4 LT |
2132 | |
2133 | switch (event) { | |
98fb8fe1 | 2134 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 2135 | * most likely via hotkey. */ |
14e04fb3 | 2136 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 2137 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
2138 | break; |
2139 | ||
98fb8fe1 | 2140 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
2141 | * connector. */ |
2142 | acpi_video_device_enumerate(video); | |
2143 | acpi_video_device_rebind(video); | |
14e04fb3 | 2144 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 2145 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
2146 | break; |
2147 | ||
4be44fcd | 2148 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
25c87f7f | 2149 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2150 | keycode = KEY_SWITCHVIDEOMODE; |
2151 | break; | |
4be44fcd | 2152 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
25c87f7f | 2153 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2154 | keycode = KEY_VIDEO_NEXT; |
2155 | break; | |
4be44fcd | 2156 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
14e04fb3 | 2157 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 2158 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
2159 | break; |
2160 | ||
2161 | default: | |
e9dab196 | 2162 | keycode = KEY_UNKNOWN; |
1da177e4 | 2163 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 2164 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
2165 | break; |
2166 | } | |
2167 | ||
7761f638 | 2168 | acpi_notifier_call_chain(device, event, 0); |
e9dab196 LY |
2169 | input_report_key(input, keycode, 1); |
2170 | input_sync(input); | |
2171 | input_report_key(input, keycode, 0); | |
2172 | input_sync(input); | |
2173 | ||
d550d98d | 2174 | return; |
1da177e4 LT |
2175 | } |
2176 | ||
4be44fcd | 2177 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 2178 | { |
50dd0969 | 2179 | struct acpi_video_device *video_device = data; |
4be44fcd | 2180 | struct acpi_device *device = NULL; |
e9dab196 LY |
2181 | struct acpi_video_bus *bus; |
2182 | struct input_dev *input; | |
2183 | int keycode; | |
1da177e4 | 2184 | |
1da177e4 | 2185 | if (!video_device) |
d550d98d | 2186 | return; |
1da177e4 | 2187 | |
e6afa0de | 2188 | device = video_device->dev; |
e9dab196 LY |
2189 | bus = video_device->video; |
2190 | input = bus->input; | |
1da177e4 LT |
2191 | |
2192 | switch (event) { | |
4be44fcd | 2193 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
2194 | if (brightness_switch_enabled) |
2195 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 2196 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2197 | keycode = KEY_BRIGHTNESS_CYCLE; |
2198 | break; | |
4be44fcd | 2199 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
2200 | if (brightness_switch_enabled) |
2201 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 2202 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2203 | keycode = KEY_BRIGHTNESSUP; |
2204 | break; | |
4be44fcd | 2205 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
2206 | if (brightness_switch_enabled) |
2207 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 2208 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2209 | keycode = KEY_BRIGHTNESSDOWN; |
2210 | break; | |
4be44fcd | 2211 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */ |
8a681a4d ZR |
2212 | if (brightness_switch_enabled) |
2213 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 2214 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
2215 | keycode = KEY_BRIGHTNESS_ZERO; |
2216 | break; | |
4be44fcd | 2217 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
2218 | if (brightness_switch_enabled) |
2219 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 2220 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 2221 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
2222 | break; |
2223 | default: | |
e9dab196 | 2224 | keycode = KEY_UNKNOWN; |
1da177e4 | 2225 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 2226 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
2227 | break; |
2228 | } | |
e9dab196 | 2229 | |
7761f638 | 2230 | acpi_notifier_call_chain(device, event, 0); |
e9dab196 LY |
2231 | input_report_key(input, keycode, 1); |
2232 | input_sync(input); | |
2233 | input_report_key(input, keycode, 0); | |
2234 | input_sync(input); | |
2235 | ||
d550d98d | 2236 | return; |
1da177e4 LT |
2237 | } |
2238 | ||
e6d9da1d | 2239 | static int instance; |
863c1490 MG |
2240 | static int acpi_video_resume(struct acpi_device *device) |
2241 | { | |
2242 | struct acpi_video_bus *video; | |
2243 | struct acpi_video_device *video_device; | |
2244 | int i; | |
2245 | ||
2246 | if (!device || !acpi_driver_data(device)) | |
2247 | return -EINVAL; | |
2248 | ||
2249 | video = acpi_driver_data(device); | |
2250 | ||
2251 | for (i = 0; i < video->attached_count; i++) { | |
2252 | video_device = video->attached_array[i].bind_info; | |
2253 | if (video_device && video_device->backlight) | |
2254 | acpi_video_set_brightness(video_device->backlight); | |
2255 | } | |
2256 | return AE_OK; | |
2257 | } | |
2258 | ||
c504f8cb ZR |
2259 | static acpi_status |
2260 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
2261 | void **return_value) | |
2262 | { | |
2263 | struct acpi_device *device = context; | |
2264 | struct acpi_device *sibling; | |
2265 | int result; | |
2266 | ||
2267 | if (handle == device->handle) | |
2268 | return AE_CTRL_TERMINATE; | |
2269 | ||
2270 | result = acpi_bus_get_device(handle, &sibling); | |
2271 | if (result) | |
2272 | return AE_OK; | |
2273 | ||
2274 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
2275 | return AE_ALREADY_EXISTS; | |
2276 | ||
2277 | return AE_OK; | |
2278 | } | |
2279 | ||
4be44fcd | 2280 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 2281 | { |
f51e8391 | 2282 | struct acpi_video_bus *video; |
e9dab196 | 2283 | struct input_dev *input; |
f51e8391 | 2284 | int error; |
c504f8cb ZR |
2285 | acpi_status status; |
2286 | ||
2287 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
2288 | device->parent->handle, 1, | |
2289 | acpi_video_bus_match, NULL, | |
2290 | device, NULL); | |
2291 | if (status == AE_ALREADY_EXISTS) { | |
2292 | printk(KERN_WARNING FW_BUG | |
2293 | "Duplicate ACPI video bus devices for the" | |
2294 | " same VGA controller, please try module " | |
2295 | "parameter \"video.allow_duplicates=1\"" | |
2296 | "if the current driver doesn't work.\n"); | |
2297 | if (!allow_duplicates) | |
2298 | return -ENODEV; | |
2299 | } | |
1da177e4 | 2300 | |
36bcbec7 | 2301 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 2302 | if (!video) |
d550d98d | 2303 | return -ENOMEM; |
1da177e4 | 2304 | |
e6d9da1d ZR |
2305 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
2306 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
2307 | if (instance) | |
2308 | device->pnp.bus_id[3] = '0' + instance; | |
2309 | instance ++; | |
2310 | } | |
f3b39f13 ZY |
2311 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
2312 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
2313 | if (instance) | |
2314 | device->pnp.bus_id[3] = '0' + instance; | |
2315 | instance++; | |
2316 | } | |
e6d9da1d | 2317 | |
e6afa0de | 2318 | video->device = device; |
1da177e4 LT |
2319 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
2320 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 2321 | device->driver_data = video; |
1da177e4 LT |
2322 | |
2323 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
2324 | error = acpi_video_bus_check(video); |
2325 | if (error) | |
2326 | goto err_free_video; | |
1da177e4 | 2327 | |
f51e8391 DT |
2328 | error = acpi_video_bus_add_fs(device); |
2329 | if (error) | |
2330 | goto err_free_video; | |
1da177e4 | 2331 | |
bbac81f5 | 2332 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
2333 | INIT_LIST_HEAD(&video->video_device_list); |
2334 | ||
2335 | acpi_video_bus_get_devices(video, device); | |
2336 | acpi_video_bus_start_devices(video); | |
2337 | ||
e9dab196 | 2338 | video->input = input = input_allocate_device(); |
f51e8391 DT |
2339 | if (!input) { |
2340 | error = -ENOMEM; | |
7015558f | 2341 | goto err_stop_video; |
f51e8391 | 2342 | } |
e9dab196 LY |
2343 | |
2344 | snprintf(video->phys, sizeof(video->phys), | |
2345 | "%s/video/input0", acpi_device_hid(video->device)); | |
2346 | ||
2347 | input->name = acpi_device_name(video->device); | |
2348 | input->phys = video->phys; | |
2349 | input->id.bustype = BUS_HOST; | |
2350 | input->id.product = 0x06; | |
91c05c66 | 2351 | input->dev.parent = &device->dev; |
e9dab196 LY |
2352 | input->evbit[0] = BIT(EV_KEY); |
2353 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
2354 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
2355 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
2356 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
2357 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
2358 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
2359 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
2360 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
2361 | set_bit(KEY_UNKNOWN, input->keybit); | |
e9dab196 | 2362 | |
f51e8391 DT |
2363 | error = input_register_device(input); |
2364 | if (error) | |
2365 | goto err_free_input_dev; | |
e9dab196 | 2366 | |
1da177e4 | 2367 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
2368 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
2369 | video->flags.multihead ? "yes" : "no", | |
2370 | video->flags.rom ? "yes" : "no", | |
2371 | video->flags.post ? "yes" : "no"); | |
1da177e4 | 2372 | |
f51e8391 DT |
2373 | return 0; |
2374 | ||
2375 | err_free_input_dev: | |
2376 | input_free_device(input); | |
f51e8391 DT |
2377 | err_stop_video: |
2378 | acpi_video_bus_stop_devices(video); | |
2379 | acpi_video_bus_put_devices(video); | |
2380 | kfree(video->attached_array); | |
2381 | acpi_video_bus_remove_fs(device); | |
2382 | err_free_video: | |
2383 | kfree(video); | |
db89b4f0 | 2384 | device->driver_data = NULL; |
1da177e4 | 2385 | |
f51e8391 | 2386 | return error; |
1da177e4 LT |
2387 | } |
2388 | ||
4be44fcd | 2389 | static int acpi_video_bus_remove(struct acpi_device *device, int type) |
1da177e4 | 2390 | { |
4be44fcd | 2391 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2392 | |
1da177e4 LT |
2393 | |
2394 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2395 | return -EINVAL; |
1da177e4 | 2396 | |
50dd0969 | 2397 | video = acpi_driver_data(device); |
1da177e4 LT |
2398 | |
2399 | acpi_video_bus_stop_devices(video); | |
1da177e4 LT |
2400 | acpi_video_bus_put_devices(video); |
2401 | acpi_video_bus_remove_fs(device); | |
2402 | ||
e9dab196 | 2403 | input_unregister_device(video->input); |
6044ec88 | 2404 | kfree(video->attached_array); |
1da177e4 LT |
2405 | kfree(video); |
2406 | ||
d550d98d | 2407 | return 0; |
1da177e4 LT |
2408 | } |
2409 | ||
74a365b3 MG |
2410 | static int __init intel_opregion_present(void) |
2411 | { | |
2412 | #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE) | |
2413 | struct pci_dev *dev = NULL; | |
2414 | u32 address; | |
2415 | ||
2416 | for_each_pci_dev(dev) { | |
2417 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2418 | continue; | |
2419 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2420 | continue; | |
2421 | pci_read_config_dword(dev, 0xfc, &address); | |
2422 | if (!address) | |
2423 | continue; | |
2424 | return 1; | |
2425 | } | |
2426 | #endif | |
2427 | return 0; | |
2428 | } | |
2429 | ||
2430 | int acpi_video_register(void) | |
1da177e4 | 2431 | { |
4be44fcd | 2432 | int result = 0; |
86e437f0 ZY |
2433 | if (register_count) { |
2434 | /* | |
2435 | * if the function of acpi_video_register is already called, | |
2436 | * don't register the acpi_vide_bus again and return no error. | |
2437 | */ | |
2438 | return 0; | |
2439 | } | |
1da177e4 | 2440 | |
1da177e4 LT |
2441 | acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir); |
2442 | if (!acpi_video_dir) | |
d550d98d | 2443 | return -ENODEV; |
1da177e4 LT |
2444 | |
2445 | result = acpi_bus_register_driver(&acpi_video_bus); | |
2446 | if (result < 0) { | |
2447 | remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); | |
d550d98d | 2448 | return -ENODEV; |
1da177e4 LT |
2449 | } |
2450 | ||
86e437f0 ZY |
2451 | /* |
2452 | * When the acpi_video_bus is loaded successfully, increase | |
2453 | * the counter reference. | |
2454 | */ | |
2455 | register_count = 1; | |
2456 | ||
d550d98d | 2457 | return 0; |
1da177e4 | 2458 | } |
74a365b3 MG |
2459 | EXPORT_SYMBOL(acpi_video_register); |
2460 | ||
86e437f0 ZY |
2461 | void acpi_video_unregister(void) |
2462 | { | |
2463 | if (!register_count) { | |
2464 | /* | |
2465 | * If the acpi video bus is already unloaded, don't | |
2466 | * unload it again and return directly. | |
2467 | */ | |
2468 | return; | |
2469 | } | |
2470 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2471 | ||
2472 | remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir); | |
2473 | ||
2474 | register_count = 0; | |
2475 | ||
2476 | return; | |
2477 | } | |
2478 | EXPORT_SYMBOL(acpi_video_unregister); | |
2479 | ||
74a365b3 MG |
2480 | /* |
2481 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2482 | * the video opregion code to be run first in order to initialise | |
2483 | * state before any ACPI video calls are made. To handle this we defer | |
2484 | * registration of the video class until the opregion code has run. | |
2485 | */ | |
2486 | ||
2487 | static int __init acpi_video_init(void) | |
2488 | { | |
45cb50e6 ZR |
2489 | dmi_check_system(video_dmi_table); |
2490 | ||
74a365b3 MG |
2491 | if (intel_opregion_present()) |
2492 | return 0; | |
2493 | ||
2494 | return acpi_video_register(); | |
2495 | } | |
1da177e4 | 2496 | |
86e437f0 | 2497 | static void __exit acpi_video_exit(void) |
1da177e4 | 2498 | { |
86e437f0 | 2499 | acpi_video_unregister(); |
1da177e4 | 2500 | |
d550d98d | 2501 | return; |
1da177e4 LT |
2502 | } |
2503 | ||
2504 | module_init(acpi_video_init); | |
2505 | module_exit(acpi_video_exit); |