Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
1da177e4 LT |
20 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
21 | */ | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/list.h> | |
bbac81f5 | 28 | #include <linux/mutex.h> |
e9dab196 | 29 | #include <linux/input.h> |
2f3d000a | 30 | #include <linux/backlight.h> |
702ed512 | 31 | #include <linux/thermal.h> |
935e5f29 | 32 | #include <linux/sort.h> |
74a365b3 MG |
33 | #include <linux/pci.h> |
34 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 35 | #include <linux/slab.h> |
eb27cae8 | 36 | #include <linux/dmi.h> |
ac7729da | 37 | #include <linux/suspend.h> |
8b48463f | 38 | #include <linux/acpi.h> |
e92a7162 | 39 | #include <acpi/video.h> |
8b48463f | 40 | #include <asm/uaccess.h> |
1da177e4 | 41 | |
14ca7a47 | 42 | #define PREFIX "ACPI: " |
8c5bd7ad | 43 | |
1da177e4 LT |
44 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
45 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
46 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
47 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
48 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
49 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
50 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
51 | ||
f4715189 TT |
52 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
53 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
54 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
55 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
56 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 57 | |
2f3d000a | 58 | #define MAX_NAME_LEN 20 |
1da177e4 | 59 | |
1da177e4 | 60 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 61 | ACPI_MODULE_NAME("video"); |
1da177e4 | 62 | |
f52fd66d | 63 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 64 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
65 | MODULE_LICENSE("GPL"); |
66 | ||
2843768b | 67 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
68 | module_param(brightness_switch_enabled, bool, 0644); |
69 | ||
c504f8cb ZR |
70 | /* |
71 | * By default, we don't allow duplicate ACPI video bus devices | |
72 | * under the same VGA controller | |
73 | */ | |
90ab5ee9 | 74 | static bool allow_duplicates; |
c504f8cb ZR |
75 | module_param(allow_duplicates, bool, 0644); |
76 | ||
654a182d HG |
77 | static int disable_backlight_sysfs_if = -1; |
78 | module_param(disable_backlight_sysfs_if, int, 0444); | |
79 | ||
915ea7e4 | 80 | static int register_count; |
2a8b18e9 | 81 | static DEFINE_MUTEX(register_count_mutex); |
67b662e1 AL |
82 | static struct mutex video_list_lock; |
83 | static struct list_head video_bus_head; | |
4be44fcd | 84 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 85 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 86 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
93a291df | 87 | void acpi_video_detect_exit(void); |
1da177e4 | 88 | |
1ba90e3a TR |
89 | static const struct acpi_device_id video_device_ids[] = { |
90 | {ACPI_VIDEO_HID, 0}, | |
91 | {"", 0}, | |
92 | }; | |
93 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
94 | ||
1da177e4 | 95 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 96 | .name = "video", |
1da177e4 | 97 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 98 | .ids = video_device_ids, |
1da177e4 LT |
99 | .ops = { |
100 | .add = acpi_video_bus_add, | |
101 | .remove = acpi_video_bus_remove, | |
7015558f | 102 | .notify = acpi_video_bus_notify, |
4be44fcd | 103 | }, |
1da177e4 LT |
104 | }; |
105 | ||
106 | struct acpi_video_bus_flags { | |
4be44fcd LB |
107 | u8 multihead:1; /* can switch video heads */ |
108 | u8 rom:1; /* can retrieve a video rom */ | |
109 | u8 post:1; /* can configure the head to */ | |
110 | u8 reserved:5; | |
1da177e4 LT |
111 | }; |
112 | ||
113 | struct acpi_video_bus_cap { | |
21fcb34e FC |
114 | u8 _DOS:1; /* Enable/Disable output switching */ |
115 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
116 | u8 _ROM:1; /* Get ROM Data */ | |
117 | u8 _GPD:1; /* Get POST Device */ | |
118 | u8 _SPD:1; /* Set POST Device */ | |
119 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 120 | u8 reserved:2; |
1da177e4 LT |
121 | }; |
122 | ||
4be44fcd LB |
123 | struct acpi_video_device_attrib { |
124 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
125 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
126 | u32 display_type:4; /* Describe the specific type in use */ | |
127 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
128 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
129 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 130 | the VGA device. */ |
21fcb34e FC |
131 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
132 | u32 reserved:10; /* Must be 0 */ | |
133 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
134 | }; |
135 | ||
136 | struct acpi_video_enumerated_device { | |
137 | union { | |
138 | u32 int_val; | |
4be44fcd | 139 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
140 | } value; |
141 | struct acpi_video_device *bind_info; | |
142 | }; | |
143 | ||
144 | struct acpi_video_bus { | |
e6afa0de | 145 | struct acpi_device *device; |
99678ed7 | 146 | bool backlight_registered; |
4be44fcd | 147 | u8 dos_setting; |
1da177e4 | 148 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd | 149 | u8 attached_count; |
b4df4636 | 150 | u8 child_count; |
4be44fcd | 151 | struct acpi_video_bus_cap cap; |
1da177e4 | 152 | struct acpi_video_bus_flags flags; |
4be44fcd | 153 | struct list_head video_device_list; |
bbac81f5 | 154 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 155 | struct list_head entry; |
e9dab196 LY |
156 | struct input_dev *input; |
157 | char phys[32]; /* for input device */ | |
ac7729da | 158 | struct notifier_block pm_nb; |
1da177e4 LT |
159 | }; |
160 | ||
161 | struct acpi_video_device_flags { | |
4be44fcd LB |
162 | u8 crt:1; |
163 | u8 lcd:1; | |
164 | u8 tvout:1; | |
82cae999 | 165 | u8 dvi:1; |
4be44fcd LB |
166 | u8 bios:1; |
167 | u8 unknown:1; | |
91e13aa3 AL |
168 | u8 notify:1; |
169 | u8 reserved:1; | |
1da177e4 LT |
170 | }; |
171 | ||
172 | struct acpi_video_device_cap { | |
21fcb34e FC |
173 | u8 _ADR:1; /* Return the unique ID */ |
174 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
175 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 176 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 177 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 178 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
179 | }; |
180 | ||
d32f6947 ZR |
181 | struct acpi_video_brightness_flags { |
182 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 183 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 184 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
185 | }; |
186 | ||
1da177e4 | 187 | struct acpi_video_device_brightness { |
4be44fcd LB |
188 | int curr; |
189 | int count; | |
190 | int *levels; | |
d32f6947 | 191 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
192 | }; |
193 | ||
194 | struct acpi_video_device { | |
4be44fcd LB |
195 | unsigned long device_id; |
196 | struct acpi_video_device_flags flags; | |
197 | struct acpi_video_device_cap cap; | |
198 | struct list_head entry; | |
8ab58e8e LT |
199 | struct delayed_work switch_brightness_work; |
200 | int switch_brightness_event; | |
4be44fcd LB |
201 | struct acpi_video_bus *video; |
202 | struct acpi_device *dev; | |
1da177e4 | 203 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 204 | struct backlight_device *backlight; |
4a703a8f | 205 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
206 | }; |
207 | ||
b7171ae7 | 208 | static const char device_decode[][30] = { |
1da177e4 LT |
209 | "motherboard VGA device", |
210 | "PCI VGA device", | |
211 | "AGP VGA device", | |
212 | "UNKNOWN", | |
213 | }; | |
214 | ||
4be44fcd LB |
215 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
216 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
217 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
218 | struct acpi_video_device *device); | |
1da177e4 | 219 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
220 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
221 | int level); | |
222 | static int acpi_video_device_lcd_get_level_current( | |
223 | struct acpi_video_device *device, | |
a89803df | 224 | unsigned long long *level, bool raw); |
4be44fcd LB |
225 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
226 | u32 level_current, u32 event); | |
8ab58e8e | 227 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 228 | |
21fcb34e | 229 | /* backlight device sysfs support */ |
2f3d000a YL |
230 | static int acpi_video_get_brightness(struct backlight_device *bd) |
231 | { | |
27663c58 | 232 | unsigned long long cur_level; |
38531e6f | 233 | int i; |
7c364e79 | 234 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 235 | |
a89803df | 236 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 237 | return -EINVAL; |
38531e6f MG |
238 | for (i = 2; i < vd->brightness->count; i++) { |
239 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
240 | /* |
241 | * The first two entries are special - see page 575 | |
242 | * of the ACPI spec 3.0 | |
243 | */ | |
915ea7e4 | 244 | return i - 2; |
38531e6f MG |
245 | } |
246 | return 0; | |
2f3d000a YL |
247 | } |
248 | ||
249 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
250 | { | |
24450c7a | 251 | int request_level = bd->props.brightness + 2; |
7c364e79 | 252 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 253 | |
8ab58e8e | 254 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
255 | return acpi_video_device_lcd_set_level(vd, |
256 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
257 | } |
258 | ||
acc2472e | 259 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
260 | .get_brightness = acpi_video_get_brightness, |
261 | .update_status = acpi_video_set_brightness, | |
262 | }; | |
263 | ||
702ed512 | 264 | /* thermal cooling device callbacks */ |
4a703a8f | 265 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 266 | long *state) |
702ed512 | 267 | { |
4a703a8f | 268 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
269 | struct acpi_video_device *video = acpi_driver_data(device); |
270 | ||
6503e5df MG |
271 | *state = video->brightness->count - 3; |
272 | return 0; | |
702ed512 ZR |
273 | } |
274 | ||
4a703a8f | 275 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 276 | long *state) |
702ed512 | 277 | { |
4a703a8f | 278 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 279 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 280 | unsigned long long level; |
6503e5df | 281 | int offset; |
702ed512 | 282 | |
a89803df | 283 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 284 | return -EINVAL; |
6503e5df MG |
285 | for (offset = 2; offset < video->brightness->count; offset++) |
286 | if (level == video->brightness->levels[offset]) { | |
287 | *state = video->brightness->count - offset - 1; | |
288 | return 0; | |
289 | } | |
702ed512 ZR |
290 | |
291 | return -EINVAL; | |
292 | } | |
293 | ||
294 | static int | |
4a703a8f | 295 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 296 | { |
4a703a8f | 297 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
298 | struct acpi_video_device *video = acpi_driver_data(device); |
299 | int level; | |
300 | ||
915ea7e4 | 301 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
302 | return -EINVAL; |
303 | ||
304 | state = video->brightness->count - state; | |
915ea7e4 | 305 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
306 | return acpi_video_device_lcd_set_level(video, level); |
307 | } | |
308 | ||
9c8b04be | 309 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
310 | .get_max_state = video_get_max_state, |
311 | .get_cur_state = video_get_cur_state, | |
312 | .set_cur_state = video_set_cur_state, | |
313 | }; | |
314 | ||
21fcb34e FC |
315 | /* |
316 | * -------------------------------------------------------------------------- | |
317 | * Video Management | |
318 | * -------------------------------------------------------------------------- | |
319 | */ | |
1da177e4 | 320 | |
1da177e4 | 321 | static int |
4be44fcd LB |
322 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
323 | union acpi_object **levels) | |
1da177e4 | 324 | { |
4be44fcd LB |
325 | int status; |
326 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
327 | union acpi_object *obj; | |
1da177e4 | 328 | |
1da177e4 LT |
329 | |
330 | *levels = NULL; | |
331 | ||
90130268 | 332 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 333 | if (!ACPI_SUCCESS(status)) |
d550d98d | 334 | return status; |
4be44fcd | 335 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 336 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 337 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
338 | status = -EFAULT; |
339 | goto err; | |
340 | } | |
341 | ||
342 | *levels = obj; | |
343 | ||
d550d98d | 344 | return 0; |
1da177e4 | 345 | |
915ea7e4 | 346 | err: |
6044ec88 | 347 | kfree(buffer.pointer); |
1da177e4 | 348 | |
d550d98d | 349 | return status; |
1da177e4 LT |
350 | } |
351 | ||
352 | static int | |
4be44fcd | 353 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 354 | { |
24450c7a | 355 | int status; |
9e6dada9 | 356 | int state; |
1da177e4 | 357 | |
0db98202 JL |
358 | status = acpi_execute_simple_method(device->dev->handle, |
359 | "_BCM", level); | |
24450c7a ZR |
360 | if (ACPI_FAILURE(status)) { |
361 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
362 | return -EIO; | |
363 | } | |
364 | ||
4500ca8e | 365 | device->brightness->curr = level; |
9e6dada9 | 366 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 367 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
368 | if (device->backlight) |
369 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
370 | return 0; |
371 | } | |
9e6dada9 | 372 | |
24450c7a ZR |
373 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
374 | return -EINVAL; | |
1da177e4 LT |
375 | } |
376 | ||
45cb50e6 ZR |
377 | /* |
378 | * For some buggy _BQC methods, we need to add a constant value to | |
379 | * the _BQC return value to get the actual current brightness level | |
380 | */ | |
381 | ||
382 | static int bqc_offset_aml_bug_workaround; | |
7ee33baa | 383 | static int video_set_bqc_offset(const struct dmi_system_id *d) |
45cb50e6 ZR |
384 | { |
385 | bqc_offset_aml_bug_workaround = 9; | |
386 | return 0; | |
387 | } | |
388 | ||
7ee33baa | 389 | static int video_disable_backlight_sysfs_if( |
654a182d HG |
390 | const struct dmi_system_id *d) |
391 | { | |
392 | if (disable_backlight_sysfs_if == -1) | |
393 | disable_backlight_sysfs_if = 1; | |
394 | return 0; | |
395 | } | |
396 | ||
7ee33baa | 397 | static struct dmi_system_id video_dmi_table[] = { |
45cb50e6 ZR |
398 | /* |
399 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
400 | */ | |
401 | { | |
402 | .callback = video_set_bqc_offset, | |
403 | .ident = "Acer Aspire 5720", | |
404 | .matches = { | |
405 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
406 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
407 | }, | |
408 | }, | |
5afc4abe LB |
409 | { |
410 | .callback = video_set_bqc_offset, | |
411 | .ident = "Acer Aspire 5710Z", | |
412 | .matches = { | |
413 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
414 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
415 | }, | |
416 | }, | |
34ac272b ZR |
417 | { |
418 | .callback = video_set_bqc_offset, | |
419 | .ident = "eMachines E510", | |
420 | .matches = { | |
421 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
422 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
423 | }, | |
424 | }, | |
93bcece2 ZR |
425 | { |
426 | .callback = video_set_bqc_offset, | |
427 | .ident = "Acer Aspire 5315", | |
428 | .matches = { | |
429 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
430 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
431 | }, | |
432 | }, | |
152a4e63 ZR |
433 | { |
434 | .callback = video_set_bqc_offset, | |
435 | .ident = "Acer Aspire 7720", | |
436 | .matches = { | |
437 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
438 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
439 | }, | |
440 | }, | |
5f24079b | 441 | |
654a182d HG |
442 | /* |
443 | * Some machines have a broken acpi-video interface for brightness | |
444 | * control, but still need an acpi_video_device_lcd_set_level() call | |
445 | * on resume to turn the backlight power on. We Enable backlight | |
446 | * control on these systems, but do not register a backlight sysfs | |
447 | * as brightness control does not work. | |
448 | */ | |
449 | { | |
450 | /* https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ | |
451 | .callback = video_disable_backlight_sysfs_if, | |
452 | .ident = "Toshiba Portege R830", | |
453 | .matches = { | |
454 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
455 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R830"), | |
456 | }, | |
457 | }, | |
45cb50e6 ZR |
458 | {} |
459 | }; | |
460 | ||
994fa63c DB |
461 | static unsigned long long |
462 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
463 | unsigned long long bqc_value) | |
464 | { | |
465 | unsigned long long level; | |
466 | ||
467 | if (device->brightness->flags._BQC_use_index) { | |
468 | /* | |
469 | * _BQC returns an index that doesn't account for | |
470 | * the first 2 items with special meaning, so we need | |
471 | * to compensate for that by offsetting ourselves | |
472 | */ | |
473 | if (device->brightness->flags._BCL_reversed) | |
474 | bqc_value = device->brightness->count - 3 - bqc_value; | |
475 | ||
476 | level = device->brightness->levels[bqc_value + 2]; | |
477 | } else { | |
478 | level = bqc_value; | |
479 | } | |
480 | ||
481 | level += bqc_offset_aml_bug_workaround; | |
482 | ||
483 | return level; | |
484 | } | |
485 | ||
1da177e4 | 486 | static int |
4be44fcd | 487 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 488 | unsigned long long *level, bool raw) |
1da177e4 | 489 | { |
c8890f90 | 490 | acpi_status status = AE_OK; |
4e231fa4 | 491 | int i; |
c8890f90 | 492 | |
c60d638e ZR |
493 | if (device->cap._BQC || device->cap._BCQ) { |
494 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
495 | ||
496 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
497 | NULL, level); |
498 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
499 | if (raw) { |
500 | /* | |
501 | * Caller has indicated he wants the raw | |
502 | * value returned by _BQC, so don't furtherly | |
503 | * mess with the value. | |
504 | */ | |
505 | return 0; | |
506 | } | |
507 | ||
994fa63c | 508 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 509 | |
4e231fa4 VS |
510 | for (i = 2; i < device->brightness->count; i++) |
511 | if (device->brightness->levels[i] == *level) { | |
512 | device->brightness->curr = *level; | |
513 | return 0; | |
915ea7e4 | 514 | } |
a89803df DB |
515 | /* |
516 | * BQC returned an invalid level. | |
517 | * Stop using it. | |
518 | */ | |
519 | ACPI_WARNING((AE_INFO, | |
520 | "%s returned an invalid level", | |
521 | buf)); | |
522 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 523 | } else { |
21fcb34e FC |
524 | /* |
525 | * Fixme: | |
c8890f90 ZR |
526 | * should we return an error or ignore this failure? |
527 | * dev->brightness->curr is a cached value which stores | |
528 | * the correct current backlight level in most cases. | |
529 | * ACPI video backlight still works w/ buggy _BQC. | |
530 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
531 | */ | |
c60d638e ZR |
532 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
533 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
534 | } |
535 | } | |
536 | ||
4500ca8e | 537 | *level = device->brightness->curr; |
c8890f90 | 538 | return 0; |
1da177e4 LT |
539 | } |
540 | ||
541 | static int | |
4be44fcd LB |
542 | acpi_video_device_EDID(struct acpi_video_device *device, |
543 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 544 | { |
4be44fcd LB |
545 | int status; |
546 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
547 | union acpi_object *obj; | |
548 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
549 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 550 | |
1da177e4 LT |
551 | |
552 | *edid = NULL; | |
553 | ||
554 | if (!device) | |
d550d98d | 555 | return -ENODEV; |
1da177e4 LT |
556 | if (length == 128) |
557 | arg0.integer.value = 1; | |
558 | else if (length == 256) | |
559 | arg0.integer.value = 2; | |
560 | else | |
d550d98d | 561 | return -EINVAL; |
1da177e4 | 562 | |
90130268 | 563 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 564 | if (ACPI_FAILURE(status)) |
d550d98d | 565 | return -ENODEV; |
1da177e4 | 566 | |
50dd0969 | 567 | obj = buffer.pointer; |
1da177e4 LT |
568 | |
569 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
570 | *edid = obj; | |
571 | else { | |
6468463a | 572 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
573 | status = -EFAULT; |
574 | kfree(obj); | |
575 | } | |
576 | ||
d550d98d | 577 | return status; |
1da177e4 LT |
578 | } |
579 | ||
1da177e4 LT |
580 | /* bus */ |
581 | ||
1da177e4 LT |
582 | /* |
583 | * Arg: | |
21fcb34e FC |
584 | * video : video bus device pointer |
585 | * bios_flag : | |
1da177e4 LT |
586 | * 0. The system BIOS should NOT automatically switch(toggle) |
587 | * the active display output. | |
588 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 589 | * active display output. No switch event. |
1da177e4 LT |
590 | * 2. The _DGS value should be locked. |
591 | * 3. The system BIOS should not automatically switch (toggle) the | |
592 | * active display output, but instead generate the display switch | |
593 | * event notify code. | |
594 | * lcd_flag : | |
595 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 596 | * of the LCD when the power changes from AC to DC |
21fcb34e | 597 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 598 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 599 | * Return Value: |
ea9f8856 | 600 | * -EINVAL wrong arg. |
1da177e4 LT |
601 | */ |
602 | ||
603 | static int | |
4be44fcd | 604 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 605 | { |
ea9f8856 | 606 | acpi_status status; |
1da177e4 | 607 | |
b0373843 ZR |
608 | if (!video->cap._DOS) |
609 | return 0; | |
1da177e4 | 610 | |
ea9f8856 IM |
611 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
612 | return -EINVAL; | |
0db98202 JL |
613 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
614 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
615 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
616 | if (ACPI_FAILURE(status)) |
617 | return -EIO; | |
1da177e4 | 618 | |
ea9f8856 | 619 | return 0; |
1da177e4 LT |
620 | } |
621 | ||
935e5f29 ZR |
622 | /* |
623 | * Simple comparison function used to sort backlight levels. | |
624 | */ | |
625 | ||
626 | static int | |
627 | acpi_video_cmp_level(const void *a, const void *b) | |
628 | { | |
629 | return *(int *)a - *(int *)b; | |
630 | } | |
631 | ||
a50188da AL |
632 | /* |
633 | * Decides if _BQC/_BCQ for this system is usable | |
634 | * | |
635 | * We do this by changing the level first and then read out the current | |
636 | * brightness level, if the value does not match, find out if it is using | |
637 | * index. If not, clear the _BQC/_BCQ capability. | |
638 | */ | |
639 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
640 | int max_level, int current_level) | |
641 | { | |
642 | struct acpi_video_device_brightness *br = device->brightness; | |
643 | int result; | |
644 | unsigned long long level; | |
645 | int test_level; | |
646 | ||
647 | /* don't mess with existing known broken systems */ | |
648 | if (bqc_offset_aml_bug_workaround) | |
649 | return 0; | |
650 | ||
651 | /* | |
652 | * Some systems always report current brightness level as maximum | |
653 | * through _BQC, we need to test another value for them. | |
654 | */ | |
b3b301c5 | 655 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
656 | |
657 | result = acpi_video_device_lcd_set_level(device, test_level); | |
658 | if (result) | |
659 | return result; | |
660 | ||
661 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
662 | if (result) | |
663 | return result; | |
664 | ||
665 | if (level != test_level) { | |
666 | /* buggy _BQC found, need to find out if it uses index */ | |
667 | if (level < br->count) { | |
668 | if (br->flags._BCL_reversed) | |
669 | level = br->count - 3 - level; | |
670 | if (br->levels[level + 2] == test_level) | |
671 | br->flags._BQC_use_index = 1; | |
672 | } | |
673 | ||
674 | if (!br->flags._BQC_use_index) | |
675 | device->cap._BQC = device->cap._BCQ = 0; | |
676 | } | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | ||
1da177e4 | 682 | /* |
21fcb34e FC |
683 | * Arg: |
684 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
685 | * |
686 | * Return Value: | |
469778c1 JJ |
687 | * Maximum brightness level |
688 | * | |
689 | * Allocate and initialize device->brightness. | |
690 | */ | |
691 | ||
692 | static int | |
693 | acpi_video_init_brightness(struct acpi_video_device *device) | |
694 | { | |
695 | union acpi_object *obj = NULL; | |
d32f6947 | 696 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 697 | unsigned long long level, level_old; |
469778c1 JJ |
698 | union acpi_object *o; |
699 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 700 | int result = -EINVAL; |
bd8ba205 | 701 | u32 value; |
469778c1 JJ |
702 | |
703 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
704 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
705 | "LCD brightness level\n")); | |
706 | goto out; | |
707 | } | |
708 | ||
709 | if (obj->package.count < 2) | |
710 | goto out; | |
711 | ||
712 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
713 | if (!br) { | |
714 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 715 | result = -ENOMEM; |
469778c1 JJ |
716 | goto out; |
717 | } | |
718 | ||
d32f6947 | 719 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 720 | GFP_KERNEL); |
1a7c618a ZR |
721 | if (!br->levels) { |
722 | result = -ENOMEM; | |
469778c1 | 723 | goto out_free; |
1a7c618a | 724 | } |
469778c1 JJ |
725 | |
726 | for (i = 0; i < obj->package.count; i++) { | |
727 | o = (union acpi_object *)&obj->package.elements[i]; | |
728 | if (o->type != ACPI_TYPE_INTEGER) { | |
729 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
730 | continue; | |
731 | } | |
bd8ba205 HG |
732 | value = (u32) o->integer.value; |
733 | /* Skip duplicate entries */ | |
734 | if (count > 2 && br->levels[count - 1] == value) | |
735 | continue; | |
736 | ||
737 | br->levels[count] = value; | |
469778c1 JJ |
738 | |
739 | if (br->levels[count] > max_level) | |
740 | max_level = br->levels[count]; | |
741 | count++; | |
742 | } | |
743 | ||
d32f6947 ZR |
744 | /* |
745 | * some buggy BIOS don't export the levels | |
746 | * when machine is on AC/Battery in _BCL package. | |
747 | * In this case, the first two elements in _BCL packages | |
748 | * are also supported brightness levels that OS should take care of. | |
749 | */ | |
90af2cf6 ZR |
750 | for (i = 2; i < count; i++) { |
751 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 752 | level_ac_battery++; |
90af2cf6 ZR |
753 | if (br->levels[i] == br->levels[1]) |
754 | level_ac_battery++; | |
755 | } | |
d32f6947 ZR |
756 | |
757 | if (level_ac_battery < 2) { | |
758 | level_ac_battery = 2 - level_ac_battery; | |
759 | br->flags._BCL_no_ac_battery_levels = 1; | |
760 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
761 | br->levels[i] = br->levels[i - level_ac_battery]; | |
762 | count += level_ac_battery; | |
763 | } else if (level_ac_battery > 2) | |
bf6787eb | 764 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 765 | |
d80fb99f ZR |
766 | /* Check if the _BCL package is in a reversed order */ |
767 | if (max_level == br->levels[2]) { | |
768 | br->flags._BCL_reversed = 1; | |
769 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
770 | acpi_video_cmp_level, NULL); | |
771 | } else if (max_level != br->levels[count - 1]) | |
772 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 773 | "Found unordered _BCL package")); |
469778c1 JJ |
774 | |
775 | br->count = count; | |
776 | device->brightness = br; | |
1a7c618a | 777 | |
1a7c618a | 778 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 779 | br->curr = level = max_level; |
e047cca6 ZR |
780 | |
781 | if (!device->cap._BQC) | |
782 | goto set_level; | |
783 | ||
a89803df DB |
784 | result = acpi_video_device_lcd_get_level_current(device, |
785 | &level_old, true); | |
1a7c618a ZR |
786 | if (result) |
787 | goto out_free_levels; | |
788 | ||
a50188da | 789 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
790 | if (result) |
791 | goto out_free_levels; | |
a50188da AL |
792 | /* |
793 | * cap._BQC may get cleared due to _BQC is found to be broken | |
794 | * in acpi_video_bqc_quirk, so check again here. | |
795 | */ | |
796 | if (!device->cap._BQC) | |
797 | goto set_level; | |
e047cca6 | 798 | |
545ef368 AL |
799 | level = acpi_video_bqc_value_to_level(device, level_old); |
800 | /* | |
801 | * On some buggy laptops, _BQC returns an uninitialized | |
802 | * value when invoked for the first time, i.e. | |
803 | * level_old is invalid (no matter whether it's a level | |
804 | * or an index). Set the backlight to max_level in this case. | |
805 | */ | |
806 | for (i = 2; i < br->count; i++) | |
807 | if (level == br->levels[i]) | |
808 | break; | |
809 | if (i == br->count || !level) | |
810 | level = max_level; | |
e047cca6 | 811 | |
e047cca6 | 812 | set_level: |
90c53ca4 | 813 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
814 | if (result) |
815 | goto out_free_levels; | |
1a7c618a | 816 | |
d32f6947 ZR |
817 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
818 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 819 | kfree(obj); |
1a7c618a | 820 | return result; |
469778c1 JJ |
821 | |
822 | out_free_levels: | |
823 | kfree(br->levels); | |
824 | out_free: | |
825 | kfree(br); | |
826 | out: | |
827 | device->brightness = NULL; | |
828 | kfree(obj); | |
1a7c618a | 829 | return result; |
469778c1 JJ |
830 | } |
831 | ||
832 | /* | |
833 | * Arg: | |
834 | * device : video output device (LCD, CRT, ..) | |
835 | * | |
836 | * Return Value: | |
21fcb34e | 837 | * None |
1da177e4 | 838 | * |
98fb8fe1 | 839 | * Find out all required AML methods defined under the output |
1da177e4 LT |
840 | * device. |
841 | */ | |
842 | ||
4be44fcd | 843 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 844 | { |
952c63e9 | 845 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 846 | device->cap._ADR = 1; |
952c63e9 | 847 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 848 | device->cap._BCL = 1; |
952c63e9 | 849 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 850 | device->cap._BCM = 1; |
952c63e9 | 851 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 852 | device->cap._BQC = 1; |
952c63e9 | 853 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
854 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
855 | device->cap._BCQ = 1; | |
856 | } | |
857 | ||
952c63e9 | 858 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 859 | device->cap._DDC = 1; |
1da177e4 LT |
860 | } |
861 | ||
862 | /* | |
21fcb34e FC |
863 | * Arg: |
864 | * device : video output device (VGA) | |
1da177e4 LT |
865 | * |
866 | * Return Value: | |
21fcb34e | 867 | * None |
1da177e4 | 868 | * |
98fb8fe1 | 869 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
870 | */ |
871 | ||
4be44fcd | 872 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 873 | { |
952c63e9 | 874 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 875 | video->cap._DOS = 1; |
952c63e9 | 876 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 877 | video->cap._DOD = 1; |
952c63e9 | 878 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 879 | video->cap._ROM = 1; |
952c63e9 | 880 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 881 | video->cap._GPD = 1; |
952c63e9 | 882 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 883 | video->cap._SPD = 1; |
952c63e9 | 884 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 885 | video->cap._VPO = 1; |
1da177e4 LT |
886 | } |
887 | ||
888 | /* | |
889 | * Check whether the video bus device has required AML method to | |
890 | * support the desired features | |
891 | */ | |
892 | ||
4be44fcd | 893 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 894 | { |
4be44fcd | 895 | acpi_status status = -ENOENT; |
1e4cffe7 | 896 | struct pci_dev *dev; |
1da177e4 LT |
897 | |
898 | if (!video) | |
d550d98d | 899 | return -EINVAL; |
1da177e4 | 900 | |
1e4cffe7 | 901 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
902 | if (!dev) |
903 | return -ENODEV; | |
1e4cffe7 | 904 | pci_dev_put(dev); |
22c13f9d | 905 | |
21fcb34e FC |
906 | /* |
907 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
908 | * to check well known required nodes. |
909 | */ | |
910 | ||
98fb8fe1 | 911 | /* Does this device support video switching? */ |
3a1151e3 SB |
912 | if (video->cap._DOS || video->cap._DOD) { |
913 | if (!video->cap._DOS) { | |
914 | printk(KERN_WARNING FW_BUG | |
915 | "ACPI(%s) defines _DOD but not _DOS\n", | |
916 | acpi_device_bid(video->device)); | |
917 | } | |
1da177e4 LT |
918 | video->flags.multihead = 1; |
919 | status = 0; | |
920 | } | |
921 | ||
98fb8fe1 | 922 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 923 | if (video->cap._ROM) { |
1da177e4 LT |
924 | video->flags.rom = 1; |
925 | status = 0; | |
926 | } | |
927 | ||
98fb8fe1 | 928 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 929 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
930 | video->flags.post = 1; |
931 | status = 0; | |
932 | } | |
933 | ||
d550d98d | 934 | return status; |
1da177e4 LT |
935 | } |
936 | ||
21fcb34e FC |
937 | /* |
938 | * -------------------------------------------------------------------------- | |
939 | * Driver Interface | |
940 | * -------------------------------------------------------------------------- | |
941 | */ | |
1da177e4 LT |
942 | |
943 | /* device interface */ | |
915ea7e4 | 944 | static struct acpi_video_device_attrib * |
82cae999 RZ |
945 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
946 | { | |
78eed028 DT |
947 | struct acpi_video_enumerated_device *ids; |
948 | int i; | |
949 | ||
950 | for (i = 0; i < video->attached_count; i++) { | |
951 | ids = &video->attached_array[i]; | |
952 | if ((ids->value.int_val & 0xffff) == device_id) | |
953 | return &ids->value.attrib; | |
954 | } | |
82cae999 | 955 | |
82cae999 RZ |
956 | return NULL; |
957 | } | |
1da177e4 | 958 | |
e92a7162 MG |
959 | static int |
960 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
961 | unsigned long device_id) | |
962 | { | |
963 | struct acpi_video_enumerated_device *ids; | |
964 | int i; | |
965 | ||
966 | for (i = 0; i < video->attached_count; i++) { | |
967 | ids = &video->attached_array[i]; | |
968 | if ((ids->value.int_val & 0xffff) == device_id) | |
969 | return ids->value.int_val; | |
970 | } | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
1da177e4 | 975 | static int |
4be44fcd LB |
976 | acpi_video_bus_get_one_device(struct acpi_device *device, |
977 | struct acpi_video_bus *video) | |
1da177e4 | 978 | { |
27663c58 | 979 | unsigned long long device_id; |
e92a7162 | 980 | int status, device_type; |
4be44fcd | 981 | struct acpi_video_device *data; |
915ea7e4 | 982 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 983 | |
4be44fcd LB |
984 | status = |
985 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
986 | /* Some device omits _ADR, we skip them instead of fail */ |
987 | if (ACPI_FAILURE(status)) | |
988 | return 0; | |
1da177e4 | 989 | |
91e13aa3 AL |
990 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
991 | if (!data) | |
992 | return -ENOMEM; | |
82cae999 | 993 | |
91e13aa3 AL |
994 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
995 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
996 | device->driver_data = data; | |
997 | ||
998 | data->device_id = device_id; | |
999 | data->video = video; | |
1000 | data->dev = device; | |
8ab58e8e LT |
1001 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1002 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1003 | |
1004 | attribute = acpi_video_get_device_attr(video, device_id); | |
1005 | ||
915ea7e4 | 1006 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1007 | switch (attribute->display_type) { |
1008 | case ACPI_VIDEO_DISPLAY_CRT: | |
1009 | data->flags.crt = 1; | |
1010 | break; | |
1011 | case ACPI_VIDEO_DISPLAY_TV: | |
1012 | data->flags.tvout = 1; | |
1013 | break; | |
1014 | case ACPI_VIDEO_DISPLAY_DVI: | |
1015 | data->flags.dvi = 1; | |
1016 | break; | |
1017 | case ACPI_VIDEO_DISPLAY_LCD: | |
1018 | data->flags.lcd = 1; | |
1019 | break; | |
1020 | default: | |
1021 | data->flags.unknown = 1; | |
1022 | break; | |
1023 | } | |
915ea7e4 | 1024 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1025 | data->flags.bios = 1; |
1026 | } else { | |
1027 | /* Check for legacy IDs */ | |
1028 | device_type = acpi_video_get_device_type(video, device_id); | |
1029 | /* Ignore bits 16 and 18-20 */ | |
1030 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1031 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1032 | data->flags.crt = 1; | |
1033 | break; | |
1034 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1035 | data->flags.lcd = 1; | |
1036 | break; | |
1037 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1038 | data->flags.tvout = 1; | |
1039 | break; | |
1040 | default: | |
1041 | data->flags.unknown = 1; | |
e92a7162 | 1042 | } |
91e13aa3 | 1043 | } |
4be44fcd | 1044 | |
91e13aa3 AL |
1045 | acpi_video_device_bind(video, data); |
1046 | acpi_video_device_find_cap(data); | |
1da177e4 | 1047 | |
91e13aa3 AL |
1048 | mutex_lock(&video->device_list_lock); |
1049 | list_add_tail(&data->entry, &video->video_device_list); | |
1050 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1051 | |
91e13aa3 | 1052 | return status; |
1da177e4 LT |
1053 | } |
1054 | ||
1055 | /* | |
1056 | * Arg: | |
21fcb34e | 1057 | * video : video bus device |
1da177e4 LT |
1058 | * |
1059 | * Return: | |
21fcb34e FC |
1060 | * none |
1061 | * | |
1062 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1063 | * bind the ids with the corresponding video devices |
1064 | * under the video bus. | |
4be44fcd | 1065 | */ |
1da177e4 | 1066 | |
4be44fcd | 1067 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1068 | { |
ff102ea9 DT |
1069 | struct acpi_video_device *dev; |
1070 | ||
bbac81f5 | 1071 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1072 | |
1073 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1074 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1075 | |
bbac81f5 | 1076 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1077 | } |
1078 | ||
1079 | /* | |
1080 | * Arg: | |
21fcb34e FC |
1081 | * video : video bus device |
1082 | * device : video output device under the video | |
1083 | * bus | |
1da177e4 LT |
1084 | * |
1085 | * Return: | |
21fcb34e FC |
1086 | * none |
1087 | * | |
1da177e4 LT |
1088 | * Bind the ids with the corresponding video devices |
1089 | * under the video bus. | |
4be44fcd | 1090 | */ |
1da177e4 LT |
1091 | |
1092 | static void | |
4be44fcd LB |
1093 | acpi_video_device_bind(struct acpi_video_bus *video, |
1094 | struct acpi_video_device *device) | |
1da177e4 | 1095 | { |
78eed028 | 1096 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1097 | int i; |
1da177e4 | 1098 | |
78eed028 DT |
1099 | for (i = 0; i < video->attached_count; i++) { |
1100 | ids = &video->attached_array[i]; | |
1101 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1102 | ids->bind_info = device; | |
1da177e4 LT |
1103 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1104 | } | |
1105 | } | |
1da177e4 LT |
1106 | } |
1107 | ||
0b8db271 AL |
1108 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1109 | { | |
1110 | struct acpi_video_bus *video = device->video; | |
1111 | int i; | |
1112 | ||
b4df4636 AL |
1113 | /* |
1114 | * If we have a broken _DOD or we have more than 8 output devices | |
1115 | * under the graphics controller node that we can't proper deal with | |
1116 | * in the operation region code currently, no need to test. | |
1117 | */ | |
1118 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1119 | return true; |
1120 | ||
1121 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1122 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1123 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1124 | return true; |
1125 | } | |
1126 | ||
1127 | return false; | |
1128 | } | |
1129 | ||
1da177e4 LT |
1130 | /* |
1131 | * Arg: | |
21fcb34e | 1132 | * video : video bus device |
1da177e4 LT |
1133 | * |
1134 | * Return: | |
21fcb34e FC |
1135 | * < 0 : error |
1136 | * | |
1da177e4 LT |
1137 | * Call _DOD to enumerate all devices attached to display adapter |
1138 | * | |
4be44fcd | 1139 | */ |
1da177e4 LT |
1140 | |
1141 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1142 | { | |
4be44fcd LB |
1143 | int status; |
1144 | int count; | |
1145 | int i; | |
78eed028 | 1146 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1147 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1148 | union acpi_object *dod = NULL; | |
1149 | union acpi_object *obj; | |
1da177e4 | 1150 | |
90130268 | 1151 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1152 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1153 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1154 | return status; |
1da177e4 LT |
1155 | } |
1156 | ||
50dd0969 | 1157 | dod = buffer.pointer; |
1da177e4 | 1158 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1159 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1160 | status = -EFAULT; |
1161 | goto out; | |
1162 | } | |
1163 | ||
1164 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1165 | dod->package.count)); |
1da177e4 | 1166 | |
78eed028 DT |
1167 | active_list = kcalloc(1 + dod->package.count, |
1168 | sizeof(struct acpi_video_enumerated_device), | |
1169 | GFP_KERNEL); | |
1170 | if (!active_list) { | |
1da177e4 LT |
1171 | status = -ENOMEM; |
1172 | goto out; | |
1173 | } | |
1174 | ||
1175 | count = 0; | |
1176 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1177 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1178 | |
1179 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1180 | printk(KERN_ERR PREFIX |
1181 | "Invalid _DOD data in element %d\n", i); | |
1182 | continue; | |
1da177e4 | 1183 | } |
78eed028 DT |
1184 | |
1185 | active_list[count].value.int_val = obj->integer.value; | |
1186 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1187 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1188 | (int)obj->integer.value)); | |
1da177e4 LT |
1189 | count++; |
1190 | } | |
1da177e4 | 1191 | |
6044ec88 | 1192 | kfree(video->attached_array); |
4be44fcd | 1193 | |
78eed028 | 1194 | video->attached_array = active_list; |
1da177e4 | 1195 | video->attached_count = count; |
78eed028 | 1196 | |
915ea7e4 | 1197 | out: |
02438d87 | 1198 | kfree(buffer.pointer); |
d550d98d | 1199 | return status; |
1da177e4 LT |
1200 | } |
1201 | ||
4be44fcd LB |
1202 | static int |
1203 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1204 | u32 level_current, u32 event) | |
1da177e4 | 1205 | { |
63f0edfc | 1206 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1207 | max = max_below = 0; |
1208 | min = min_above = 255; | |
63f0edfc | 1209 | /* Find closest level to level_current */ |
0a3db1ce | 1210 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1211 | l = device->brightness->levels[i]; |
1212 | if (abs(l - level_current) < abs(delta)) { | |
1213 | delta = l - level_current; | |
1214 | if (!delta) | |
1215 | break; | |
1216 | } | |
1217 | } | |
1218 | /* Ajust level_current to closest available level */ | |
1219 | level_current += delta; | |
0a3db1ce | 1220 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1221 | l = device->brightness->levels[i]; |
1222 | if (l < min) | |
1223 | min = l; | |
1224 | if (l > max) | |
1225 | max = l; | |
1226 | if (l < min_above && l > level_current) | |
1227 | min_above = l; | |
1228 | if (l > max_below && l < level_current) | |
1229 | max_below = l; | |
1230 | } | |
1231 | ||
1232 | switch (event) { | |
1233 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1234 | return (level_current < max) ? min_above : min; | |
1235 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1236 | return (level_current < max) ? min_above : max; | |
1237 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1238 | return (level_current > min) ? max_below : min; | |
1239 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1240 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1241 | return 0; | |
1242 | default: | |
1243 | return level_current; | |
1244 | } | |
1da177e4 LT |
1245 | } |
1246 | ||
8ab58e8e LT |
1247 | static void |
1248 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1249 | { |
8ab58e8e LT |
1250 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1251 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1252 | unsigned long long level_current, level_next; |
8ab58e8e | 1253 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1254 | int result = -EINVAL; |
1255 | ||
fbc9fe1b | 1256 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
654a182d | 1257 | if (!device->backlight) |
8ab58e8e | 1258 | return; |
28c32e99 | 1259 | |
469778c1 | 1260 | if (!device->brightness) |
c8890f90 ZR |
1261 | goto out; |
1262 | ||
1263 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1264 | &level_current, |
1265 | false); | |
c8890f90 ZR |
1266 | if (result) |
1267 | goto out; | |
1268 | ||
1da177e4 | 1269 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1270 | |
24450c7a | 1271 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1272 | |
36342742 MG |
1273 | if (!result) |
1274 | backlight_force_update(device->backlight, | |
1275 | BACKLIGHT_UPDATE_HOTKEY); | |
1276 | ||
c8890f90 ZR |
1277 | out: |
1278 | if (result) | |
1279 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1280 | } |
1281 | ||
e92a7162 MG |
1282 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1283 | void **edid) | |
1284 | { | |
1285 | struct acpi_video_bus *video; | |
1286 | struct acpi_video_device *video_device; | |
1287 | union acpi_object *buffer = NULL; | |
1288 | acpi_status status; | |
1289 | int i, length; | |
1290 | ||
1291 | if (!device || !acpi_driver_data(device)) | |
1292 | return -EINVAL; | |
1293 | ||
1294 | video = acpi_driver_data(device); | |
1295 | ||
1296 | for (i = 0; i < video->attached_count; i++) { | |
1297 | video_device = video->attached_array[i].bind_info; | |
1298 | length = 256; | |
1299 | ||
1300 | if (!video_device) | |
1301 | continue; | |
1302 | ||
82069552 ZR |
1303 | if (!video_device->cap._DDC) |
1304 | continue; | |
1305 | ||
e92a7162 MG |
1306 | if (type) { |
1307 | switch (type) { | |
1308 | case ACPI_VIDEO_DISPLAY_CRT: | |
1309 | if (!video_device->flags.crt) | |
1310 | continue; | |
1311 | break; | |
1312 | case ACPI_VIDEO_DISPLAY_TV: | |
1313 | if (!video_device->flags.tvout) | |
1314 | continue; | |
1315 | break; | |
1316 | case ACPI_VIDEO_DISPLAY_DVI: | |
1317 | if (!video_device->flags.dvi) | |
1318 | continue; | |
1319 | break; | |
1320 | case ACPI_VIDEO_DISPLAY_LCD: | |
1321 | if (!video_device->flags.lcd) | |
1322 | continue; | |
1323 | break; | |
1324 | } | |
1325 | } else if (video_device->device_id != device_id) { | |
1326 | continue; | |
1327 | } | |
1328 | ||
1329 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1330 | ||
1331 | if (ACPI_FAILURE(status) || !buffer || | |
1332 | buffer->type != ACPI_TYPE_BUFFER) { | |
1333 | length = 128; | |
1334 | status = acpi_video_device_EDID(video_device, &buffer, | |
1335 | length); | |
1336 | if (ACPI_FAILURE(status) || !buffer || | |
1337 | buffer->type != ACPI_TYPE_BUFFER) { | |
1338 | continue; | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | *edid = buffer->buffer.pointer; | |
1343 | return length; | |
1344 | } | |
1345 | ||
1346 | return -ENODEV; | |
1347 | } | |
1348 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1349 | ||
1da177e4 | 1350 | static int |
4be44fcd LB |
1351 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1352 | struct acpi_device *device) | |
1da177e4 | 1353 | { |
fba4e087 | 1354 | int status = 0; |
ff102ea9 | 1355 | struct acpi_device *dev; |
1da177e4 | 1356 | |
fba4e087 IM |
1357 | /* |
1358 | * There are systems where video module known to work fine regardless | |
1359 | * of broken _DOD and ignoring returned value here doesn't cause | |
1360 | * any issues later. | |
1361 | */ | |
1362 | acpi_video_device_enumerate(video); | |
1da177e4 | 1363 | |
ff102ea9 | 1364 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1365 | |
1366 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1367 | if (status) { |
91e13aa3 AL |
1368 | dev_err(&dev->dev, "Can't attach device\n"); |
1369 | break; | |
1da177e4 | 1370 | } |
b4df4636 | 1371 | video->child_count++; |
1da177e4 | 1372 | } |
d550d98d | 1373 | return status; |
1da177e4 LT |
1374 | } |
1375 | ||
1da177e4 LT |
1376 | /* acpi_video interface */ |
1377 | ||
efaa14c7 AL |
1378 | /* |
1379 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1380 | * preform any automatic brightness change on receiving a notification. | |
1381 | */ | |
4be44fcd | 1382 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1383 | { |
efaa14c7 | 1384 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1385 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1386 | } |
1387 | ||
4be44fcd | 1388 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1389 | { |
efaa14c7 | 1390 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1391 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1392 | } |
1393 | ||
7015558f | 1394 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1395 | { |
7015558f | 1396 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1397 | struct input_dev *input; |
17c452f9 | 1398 | int keycode = 0; |
e9dab196 | 1399 | |
67b662e1 | 1400 | if (!video || !video->input) |
d550d98d | 1401 | return; |
1da177e4 | 1402 | |
e9dab196 | 1403 | input = video->input; |
1da177e4 LT |
1404 | |
1405 | switch (event) { | |
98fb8fe1 | 1406 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1407 | * most likely via hotkey. */ |
8a37c65d | 1408 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1409 | break; |
1410 | ||
98fb8fe1 | 1411 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1412 | * connector. */ |
1413 | acpi_video_device_enumerate(video); | |
1414 | acpi_video_device_rebind(video); | |
e9dab196 | 1415 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1416 | break; |
1417 | ||
4be44fcd | 1418 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1419 | keycode = KEY_SWITCHVIDEOMODE; |
1420 | break; | |
4be44fcd | 1421 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1422 | keycode = KEY_VIDEO_NEXT; |
1423 | break; | |
4be44fcd | 1424 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1425 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1426 | break; |
1427 | ||
1428 | default: | |
1429 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1430 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1431 | break; |
1432 | } | |
1433 | ||
8a37c65d LT |
1434 | if (acpi_notifier_call_chain(device, event, 0)) |
1435 | /* Something vetoed the keypress. */ | |
1436 | keycode = 0; | |
17c452f9 MG |
1437 | |
1438 | if (keycode) { | |
1439 | input_report_key(input, keycode, 1); | |
1440 | input_sync(input); | |
1441 | input_report_key(input, keycode, 0); | |
1442 | input_sync(input); | |
1443 | } | |
e9dab196 | 1444 | |
d550d98d | 1445 | return; |
1da177e4 LT |
1446 | } |
1447 | ||
8ab58e8e LT |
1448 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1449 | u32 event) | |
1450 | { | |
1451 | if (!brightness_switch_enabled) | |
1452 | return; | |
1453 | ||
1454 | video_device->switch_brightness_event = event; | |
1455 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1456 | } | |
1457 | ||
4be44fcd | 1458 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1459 | { |
50dd0969 | 1460 | struct acpi_video_device *video_device = data; |
4be44fcd | 1461 | struct acpi_device *device = NULL; |
e9dab196 LY |
1462 | struct acpi_video_bus *bus; |
1463 | struct input_dev *input; | |
17c452f9 | 1464 | int keycode = 0; |
1da177e4 | 1465 | |
1da177e4 | 1466 | if (!video_device) |
d550d98d | 1467 | return; |
1da177e4 | 1468 | |
e6afa0de | 1469 | device = video_device->dev; |
e9dab196 LY |
1470 | bus = video_device->video; |
1471 | input = bus->input; | |
1da177e4 LT |
1472 | |
1473 | switch (event) { | |
4be44fcd | 1474 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1475 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1476 | keycode = KEY_BRIGHTNESS_CYCLE; |
1477 | break; | |
4be44fcd | 1478 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1479 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1480 | keycode = KEY_BRIGHTNESSUP; |
1481 | break; | |
4be44fcd | 1482 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1483 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1484 | keycode = KEY_BRIGHTNESSDOWN; |
1485 | break; | |
70f23fd6 | 1486 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1487 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1488 | keycode = KEY_BRIGHTNESS_ZERO; |
1489 | break; | |
4be44fcd | 1490 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1491 | brightness_switch_event(video_device, event); |
e9dab196 | 1492 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1493 | break; |
1494 | default: | |
1495 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1496 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1497 | break; |
1498 | } | |
e9dab196 | 1499 | |
7761f638 | 1500 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1501 | |
1502 | if (keycode) { | |
1503 | input_report_key(input, keycode, 1); | |
1504 | input_sync(input); | |
1505 | input_report_key(input, keycode, 0); | |
1506 | input_sync(input); | |
1507 | } | |
e9dab196 | 1508 | |
d550d98d | 1509 | return; |
1da177e4 LT |
1510 | } |
1511 | ||
ac7729da RW |
1512 | static int acpi_video_resume(struct notifier_block *nb, |
1513 | unsigned long val, void *ign) | |
863c1490 MG |
1514 | { |
1515 | struct acpi_video_bus *video; | |
1516 | struct acpi_video_device *video_device; | |
1517 | int i; | |
1518 | ||
ac7729da RW |
1519 | switch (val) { |
1520 | case PM_HIBERNATION_PREPARE: | |
1521 | case PM_SUSPEND_PREPARE: | |
1522 | case PM_RESTORE_PREPARE: | |
1523 | return NOTIFY_DONE; | |
1524 | } | |
863c1490 | 1525 | |
ac7729da RW |
1526 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1527 | ||
1528 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1529 | |
1530 | for (i = 0; i < video->attached_count; i++) { | |
1531 | video_device = video->attached_array[i].bind_info; | |
654a182d HG |
1532 | if (video_device && video_device->brightness) |
1533 | acpi_video_device_lcd_set_level(video_device, | |
1534 | video_device->brightness->curr); | |
863c1490 | 1535 | } |
ac7729da RW |
1536 | |
1537 | return NOTIFY_OK; | |
863c1490 MG |
1538 | } |
1539 | ||
c504f8cb ZR |
1540 | static acpi_status |
1541 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1542 | void **return_value) | |
1543 | { | |
1544 | struct acpi_device *device = context; | |
1545 | struct acpi_device *sibling; | |
1546 | int result; | |
1547 | ||
1548 | if (handle == device->handle) | |
1549 | return AE_CTRL_TERMINATE; | |
1550 | ||
1551 | result = acpi_bus_get_device(handle, &sibling); | |
1552 | if (result) | |
1553 | return AE_OK; | |
1554 | ||
1555 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1556 | return AE_ALREADY_EXISTS; | |
1557 | ||
1558 | return AE_OK; | |
1559 | } | |
1560 | ||
67b662e1 AL |
1561 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1562 | { | |
99678ed7 HG |
1563 | struct backlight_properties props; |
1564 | struct pci_dev *pdev; | |
1565 | acpi_handle acpi_parent; | |
1566 | struct device *parent = NULL; | |
1567 | int result; | |
1568 | static int count; | |
1569 | char *name; | |
67b662e1 | 1570 | |
0b8db271 AL |
1571 | /* |
1572 | * Do not create backlight device for video output | |
1573 | * device that is not in the enumerated list. | |
1574 | */ | |
1575 | if (!acpi_video_device_in_dod(device)) { | |
1576 | dev_dbg(&device->dev->dev, "not in _DOD list, ignore\n"); | |
1577 | return; | |
1578 | } | |
1579 | ||
99678ed7 HG |
1580 | result = acpi_video_init_brightness(device); |
1581 | if (result) | |
1582 | return; | |
654a182d HG |
1583 | |
1584 | if (disable_backlight_sysfs_if > 0) | |
1585 | return; | |
1586 | ||
99678ed7 HG |
1587 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
1588 | if (!name) | |
1589 | return; | |
1590 | count++; | |
67b662e1 | 1591 | |
99678ed7 | 1592 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1593 | |
99678ed7 HG |
1594 | pdev = acpi_get_pci_dev(acpi_parent); |
1595 | if (pdev) { | |
1596 | parent = &pdev->dev; | |
1597 | pci_dev_put(pdev); | |
1598 | } | |
67b662e1 | 1599 | |
99678ed7 HG |
1600 | memset(&props, 0, sizeof(struct backlight_properties)); |
1601 | props.type = BACKLIGHT_FIRMWARE; | |
1602 | props.max_brightness = device->brightness->count - 3; | |
1603 | device->backlight = backlight_device_register(name, | |
1604 | parent, | |
1605 | device, | |
1606 | &acpi_backlight_ops, | |
1607 | &props); | |
1608 | kfree(name); | |
654a182d HG |
1609 | if (IS_ERR(device->backlight)) { |
1610 | device->backlight = NULL; | |
99678ed7 | 1611 | return; |
654a182d | 1612 | } |
67b662e1 | 1613 | |
99678ed7 HG |
1614 | /* |
1615 | * Save current brightness level in case we have to restore it | |
1616 | * before acpi_video_device_lcd_set_level() is called next time. | |
1617 | */ | |
1618 | device->backlight->props.brightness = | |
1619 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1620 | |
99678ed7 HG |
1621 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1622 | device->dev, &video_cooling_ops); | |
1623 | if (IS_ERR(device->cooling_dev)) { | |
1624 | /* | |
1625 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1626 | * Also, why the hell we are returning early and not attempt to | |
1627 | * register video output if cooling device registration failed? | |
1628 | * -- dtor | |
1629 | */ | |
1630 | device->cooling_dev = NULL; | |
1631 | return; | |
67b662e1 | 1632 | } |
99678ed7 HG |
1633 | |
1634 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1635 | device->cooling_dev->id); | |
1636 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1637 | &device->cooling_dev->device.kobj, | |
1638 | "thermal_cooling"); | |
1639 | if (result) | |
1640 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1641 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1642 | &device->dev->dev.kobj, "device"); | |
1643 | if (result) | |
1644 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1645 | } |
1646 | ||
dce4ec2e AL |
1647 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1648 | { | |
1649 | struct acpi_video_device *dev; | |
1650 | union acpi_object *levels; | |
1651 | ||
1652 | mutex_lock(&video->device_list_lock); | |
1653 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
1654 | if (!acpi_video_device_lcd_query_levels(dev, &levels)) | |
1655 | kfree(levels); | |
1656 | } | |
1657 | mutex_unlock(&video->device_list_lock); | |
1658 | } | |
1659 | ||
67b662e1 AL |
1660 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1661 | { | |
1662 | struct acpi_video_device *dev; | |
1663 | ||
53a92ba7 HG |
1664 | if (video->backlight_registered) |
1665 | return 0; | |
1666 | ||
dce4ec2e AL |
1667 | acpi_video_run_bcl_for_osi(video); |
1668 | ||
3bd6bce3 | 1669 | if (acpi_video_get_backlight_type() != acpi_backlight_video) |
99678ed7 HG |
1670 | return 0; |
1671 | ||
67b662e1 AL |
1672 | mutex_lock(&video->device_list_lock); |
1673 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1674 | acpi_video_dev_register_backlight(dev); | |
1675 | mutex_unlock(&video->device_list_lock); | |
1676 | ||
99678ed7 HG |
1677 | video->backlight_registered = true; |
1678 | ||
67b662e1 AL |
1679 | video->pm_nb.notifier_call = acpi_video_resume; |
1680 | video->pm_nb.priority = 0; | |
1681 | return register_pm_notifier(&video->pm_nb); | |
1682 | } | |
1683 | ||
1684 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1685 | { | |
1686 | if (device->backlight) { | |
1687 | backlight_device_unregister(device->backlight); | |
1688 | device->backlight = NULL; | |
1689 | } | |
1690 | if (device->brightness) { | |
1691 | kfree(device->brightness->levels); | |
1692 | kfree(device->brightness); | |
1693 | device->brightness = NULL; | |
1694 | } | |
1695 | if (device->cooling_dev) { | |
1696 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1697 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1698 | thermal_cooling_device_unregister(device->cooling_dev); | |
1699 | device->cooling_dev = NULL; | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1704 | { | |
1705 | struct acpi_video_device *dev; | |
99678ed7 HG |
1706 | int error; |
1707 | ||
1708 | if (!video->backlight_registered) | |
1709 | return 0; | |
1710 | ||
1711 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1712 | |
1713 | mutex_lock(&video->device_list_lock); | |
1714 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1715 | acpi_video_dev_unregister_backlight(dev); | |
1716 | mutex_unlock(&video->device_list_lock); | |
1717 | ||
99678ed7 HG |
1718 | video->backlight_registered = false; |
1719 | ||
67b662e1 AL |
1720 | return error; |
1721 | } | |
1722 | ||
1723 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1724 | { | |
1725 | acpi_status status; | |
1726 | struct acpi_device *adev = device->dev; | |
1727 | ||
1728 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1729 | acpi_video_device_notify, device); | |
1730 | if (ACPI_FAILURE(status)) | |
1731 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1732 | else | |
1733 | device->flags.notify = 1; | |
1734 | } | |
1735 | ||
1736 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1737 | { | |
1738 | struct input_dev *input; | |
1739 | struct acpi_video_device *dev; | |
1740 | int error; | |
1741 | ||
1742 | video->input = input = input_allocate_device(); | |
1743 | if (!input) { | |
1744 | error = -ENOMEM; | |
1745 | goto out; | |
1746 | } | |
1747 | ||
1748 | error = acpi_video_bus_start_devices(video); | |
1749 | if (error) | |
1750 | goto err_free_input; | |
1751 | ||
1752 | snprintf(video->phys, sizeof(video->phys), | |
1753 | "%s/video/input0", acpi_device_hid(video->device)); | |
1754 | ||
1755 | input->name = acpi_device_name(video->device); | |
1756 | input->phys = video->phys; | |
1757 | input->id.bustype = BUS_HOST; | |
1758 | input->id.product = 0x06; | |
1759 | input->dev.parent = &video->device->dev; | |
1760 | input->evbit[0] = BIT(EV_KEY); | |
1761 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1762 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1763 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1764 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1765 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1766 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1767 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1768 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1769 | ||
1770 | error = input_register_device(input); | |
1771 | if (error) | |
1772 | goto err_stop_dev; | |
1773 | ||
1774 | mutex_lock(&video->device_list_lock); | |
1775 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1776 | acpi_video_dev_add_notify_handler(dev); | |
1777 | mutex_unlock(&video->device_list_lock); | |
1778 | ||
1779 | return 0; | |
1780 | ||
1781 | err_stop_dev: | |
1782 | acpi_video_bus_stop_devices(video); | |
1783 | err_free_input: | |
1784 | input_free_device(input); | |
1785 | video->input = NULL; | |
1786 | out: | |
1787 | return error; | |
1788 | } | |
1789 | ||
1790 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1791 | { | |
1792 | if (dev->flags.notify) { | |
1793 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1794 | acpi_video_device_notify); | |
1795 | dev->flags.notify = 0; | |
1796 | } | |
1797 | } | |
1798 | ||
1799 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1800 | { | |
1801 | struct acpi_video_device *dev; | |
1802 | ||
1803 | mutex_lock(&video->device_list_lock); | |
1804 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1805 | acpi_video_dev_remove_notify_handler(dev); | |
1806 | mutex_unlock(&video->device_list_lock); | |
1807 | ||
1808 | acpi_video_bus_stop_devices(video); | |
1809 | input_unregister_device(video->input); | |
1810 | video->input = NULL; | |
1811 | } | |
1812 | ||
1813 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1814 | { | |
1815 | struct acpi_video_device *dev, *next; | |
1816 | ||
1817 | mutex_lock(&video->device_list_lock); | |
1818 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1819 | list_del(&dev->entry); | |
1820 | kfree(dev); | |
1821 | } | |
1822 | mutex_unlock(&video->device_list_lock); | |
1823 | ||
1824 | return 0; | |
1825 | } | |
1826 | ||
ac7729da RW |
1827 | static int instance; |
1828 | ||
4be44fcd | 1829 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1830 | { |
f51e8391 | 1831 | struct acpi_video_bus *video; |
f51e8391 | 1832 | int error; |
c504f8cb ZR |
1833 | acpi_status status; |
1834 | ||
1835 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1836 | device->parent->handle, 1, | |
1837 | acpi_video_bus_match, NULL, | |
1838 | device, NULL); | |
1839 | if (status == AE_ALREADY_EXISTS) { | |
1840 | printk(KERN_WARNING FW_BUG | |
1841 | "Duplicate ACPI video bus devices for the" | |
1842 | " same VGA controller, please try module " | |
1843 | "parameter \"video.allow_duplicates=1\"" | |
1844 | "if the current driver doesn't work.\n"); | |
1845 | if (!allow_duplicates) | |
1846 | return -ENODEV; | |
1847 | } | |
1da177e4 | 1848 | |
36bcbec7 | 1849 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1850 | if (!video) |
d550d98d | 1851 | return -ENOMEM; |
1da177e4 | 1852 | |
e6d9da1d ZR |
1853 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1854 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1855 | if (instance) | |
1856 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1857 | instance++; |
e6d9da1d | 1858 | } |
f3b39f13 ZY |
1859 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1860 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1861 | if (instance) | |
1862 | device->pnp.bus_id[3] = '0' + instance; | |
1863 | instance++; | |
1864 | } | |
e6d9da1d | 1865 | |
e6afa0de | 1866 | video->device = device; |
1da177e4 LT |
1867 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1868 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1869 | device->driver_data = video; |
1da177e4 LT |
1870 | |
1871 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1872 | error = acpi_video_bus_check(video); |
1873 | if (error) | |
1874 | goto err_free_video; | |
1da177e4 | 1875 | |
bbac81f5 | 1876 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1877 | INIT_LIST_HEAD(&video->video_device_list); |
1878 | ||
ea9f8856 IM |
1879 | error = acpi_video_bus_get_devices(video, device); |
1880 | if (error) | |
91e13aa3 | 1881 | goto err_put_video; |
1da177e4 | 1882 | |
1da177e4 | 1883 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1884 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1885 | video->flags.multihead ? "yes" : "no", | |
1886 | video->flags.rom ? "yes" : "no", | |
1887 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1888 | mutex_lock(&video_list_lock); |
1889 | list_add_tail(&video->entry, &video_bus_head); | |
1890 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1891 | |
67b662e1 AL |
1892 | acpi_video_bus_register_backlight(video); |
1893 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1894 | |
f51e8391 DT |
1895 | return 0; |
1896 | ||
67b662e1 | 1897 | err_put_video: |
f51e8391 DT |
1898 | acpi_video_bus_put_devices(video); |
1899 | kfree(video->attached_array); | |
67b662e1 | 1900 | err_free_video: |
f51e8391 | 1901 | kfree(video); |
db89b4f0 | 1902 | device->driver_data = NULL; |
1da177e4 | 1903 | |
f51e8391 | 1904 | return error; |
1da177e4 LT |
1905 | } |
1906 | ||
51fac838 | 1907 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1908 | { |
4be44fcd | 1909 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1910 | |
1da177e4 LT |
1911 | |
1912 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1913 | return -EINVAL; |
1da177e4 | 1914 | |
50dd0969 | 1915 | video = acpi_driver_data(device); |
1da177e4 | 1916 | |
67b662e1 AL |
1917 | acpi_video_bus_remove_notify_handler(video); |
1918 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1919 | acpi_video_bus_put_devices(video); |
1da177e4 | 1920 | |
67b662e1 AL |
1921 | mutex_lock(&video_list_lock); |
1922 | list_del(&video->entry); | |
1923 | mutex_unlock(&video_list_lock); | |
1924 | ||
6044ec88 | 1925 | kfree(video->attached_array); |
1da177e4 LT |
1926 | kfree(video); |
1927 | ||
d550d98d | 1928 | return 0; |
1da177e4 LT |
1929 | } |
1930 | ||
c6996bdd AC |
1931 | static int __init is_i740(struct pci_dev *dev) |
1932 | { | |
1933 | if (dev->device == 0x00D1) | |
1934 | return 1; | |
1935 | if (dev->device == 0x7000) | |
1936 | return 1; | |
1937 | return 0; | |
1938 | } | |
1939 | ||
74a365b3 MG |
1940 | static int __init intel_opregion_present(void) |
1941 | { | |
c6996bdd | 1942 | int opregion = 0; |
74a365b3 MG |
1943 | struct pci_dev *dev = NULL; |
1944 | u32 address; | |
1945 | ||
1946 | for_each_pci_dev(dev) { | |
1947 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1948 | continue; | |
1949 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1950 | continue; | |
c6996bdd AC |
1951 | /* We don't want to poke around undefined i740 registers */ |
1952 | if (is_i740(dev)) | |
1953 | continue; | |
74a365b3 MG |
1954 | pci_read_config_dword(dev, 0xfc, &address); |
1955 | if (!address) | |
1956 | continue; | |
c6996bdd | 1957 | opregion = 1; |
74a365b3 | 1958 | } |
c6996bdd | 1959 | return opregion; |
74a365b3 MG |
1960 | } |
1961 | ||
8e5c2b77 | 1962 | int acpi_video_register(void) |
1da177e4 | 1963 | { |
2a8b18e9 | 1964 | int ret = 0; |
28d63403 | 1965 | |
2a8b18e9 | 1966 | mutex_lock(®ister_count_mutex); |
86e437f0 ZY |
1967 | if (register_count) { |
1968 | /* | |
8e5c2b77 RW |
1969 | * if the function of acpi_video_register is already called, |
1970 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 | 1971 | */ |
2a8b18e9 | 1972 | goto leave; |
86e437f0 | 1973 | } |
1da177e4 | 1974 | |
67b662e1 AL |
1975 | mutex_init(&video_list_lock); |
1976 | INIT_LIST_HEAD(&video_bus_head); | |
1977 | ||
7ee33baa HG |
1978 | dmi_check_system(video_dmi_table); |
1979 | ||
28d63403 CW |
1980 | ret = acpi_bus_register_driver(&acpi_video_bus); |
1981 | if (ret) | |
2a8b18e9 | 1982 | goto leave; |
1da177e4 | 1983 | |
86e437f0 ZY |
1984 | /* |
1985 | * When the acpi_video_bus is loaded successfully, increase | |
1986 | * the counter reference. | |
1987 | */ | |
1988 | register_count = 1; | |
1989 | ||
2a8b18e9 HG |
1990 | leave: |
1991 | mutex_unlock(®ister_count_mutex); | |
1992 | return ret; | |
1da177e4 | 1993 | } |
8e5c2b77 | 1994 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 1995 | |
86e437f0 ZY |
1996 | void acpi_video_unregister(void) |
1997 | { | |
2a8b18e9 HG |
1998 | mutex_lock(®ister_count_mutex); |
1999 | if (register_count) { | |
2000 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2001 | register_count = 0; | |
86e437f0 | 2002 | } |
2a8b18e9 | 2003 | mutex_unlock(®ister_count_mutex); |
86e437f0 ZY |
2004 | } |
2005 | EXPORT_SYMBOL(acpi_video_unregister); | |
2006 | ||
1b7f37e1 HG |
2007 | void acpi_video_unregister_backlight(void) |
2008 | { | |
2009 | struct acpi_video_bus *video; | |
2010 | ||
2a8b18e9 HG |
2011 | mutex_lock(®ister_count_mutex); |
2012 | if (register_count) { | |
2013 | mutex_lock(&video_list_lock); | |
2014 | list_for_each_entry(video, &video_bus_head, entry) | |
2015 | acpi_video_bus_unregister_backlight(video); | |
2016 | mutex_unlock(&video_list_lock); | |
2017 | } | |
2018 | mutex_unlock(®ister_count_mutex); | |
1b7f37e1 | 2019 | } |
1b7f37e1 | 2020 | |
74a365b3 MG |
2021 | /* |
2022 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2023 | * the video opregion code to be run first in order to initialise | |
2024 | * state before any ACPI video calls are made. To handle this we defer | |
2025 | * registration of the video class until the opregion code has run. | |
2026 | */ | |
2027 | ||
2028 | static int __init acpi_video_init(void) | |
2029 | { | |
6e17cb12 CW |
2030 | /* |
2031 | * Let the module load even if ACPI is disabled (e.g. due to | |
2032 | * a broken BIOS) so that i915.ko can still be loaded on such | |
2033 | * old systems without an AcpiOpRegion. | |
2034 | * | |
2035 | * acpi_video_register() will report -ENODEV later as well due | |
2036 | * to acpi_disabled when i915.ko tries to register itself afterwards. | |
2037 | */ | |
2038 | if (acpi_disabled) | |
2039 | return 0; | |
2040 | ||
74a365b3 MG |
2041 | if (intel_opregion_present()) |
2042 | return 0; | |
2043 | ||
2044 | return acpi_video_register(); | |
2045 | } | |
1da177e4 | 2046 | |
86e437f0 | 2047 | static void __exit acpi_video_exit(void) |
1da177e4 | 2048 | { |
93a291df | 2049 | acpi_video_detect_exit(); |
86e437f0 | 2050 | acpi_video_unregister(); |
1da177e4 | 2051 | |
d550d98d | 2052 | return; |
1da177e4 LT |
2053 | } |
2054 | ||
2055 | module_init(acpi_video_init); | |
2056 | module_exit(acpi_video_exit); |