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Commit | Line | Data |
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1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/list.h> | |
bbac81f5 | 32 | #include <linux/mutex.h> |
e9dab196 | 33 | #include <linux/input.h> |
2f3d000a | 34 | #include <linux/backlight.h> |
702ed512 | 35 | #include <linux/thermal.h> |
935e5f29 | 36 | #include <linux/sort.h> |
74a365b3 MG |
37 | #include <linux/pci.h> |
38 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
eb27cae8 | 40 | #include <linux/dmi.h> |
ac7729da | 41 | #include <linux/suspend.h> |
8b48463f | 42 | #include <linux/acpi.h> |
e92a7162 | 43 | #include <acpi/video.h> |
8b48463f | 44 | #include <asm/uaccess.h> |
1da177e4 | 45 | |
8c5bd7ad RW |
46 | #include "internal.h" |
47 | ||
1da177e4 LT |
48 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
49 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
50 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
51 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
52 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
53 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
54 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
55 | ||
f4715189 TT |
56 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
57 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
58 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
59 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
60 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 61 | |
2f3d000a | 62 | #define MAX_NAME_LEN 20 |
1da177e4 | 63 | |
1da177e4 | 64 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 65 | ACPI_MODULE_NAME("video"); |
1da177e4 | 66 | |
f52fd66d | 67 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 68 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
69 | MODULE_LICENSE("GPL"); |
70 | ||
2843768b | 71 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
72 | module_param(brightness_switch_enabled, bool, 0644); |
73 | ||
c504f8cb ZR |
74 | /* |
75 | * By default, we don't allow duplicate ACPI video bus devices | |
76 | * under the same VGA controller | |
77 | */ | |
90ab5ee9 | 78 | static bool allow_duplicates; |
c504f8cb ZR |
79 | module_param(allow_duplicates, bool, 0644); |
80 | ||
fbc9fe1b | 81 | /* |
0e9f81d3 AL |
82 | * For Windows 8 systems: used to decide if video module |
83 | * should skip registering backlight interface of its own. | |
fbc9fe1b | 84 | */ |
25294e9f | 85 | static int use_native_backlight_param = -1; |
0e9f81d3 | 86 | module_param_named(use_native_backlight, use_native_backlight_param, int, 0444); |
25294e9f | 87 | static bool use_native_backlight_dmi = true; |
fbc9fe1b | 88 | |
915ea7e4 | 89 | static int register_count; |
67b662e1 AL |
90 | static struct mutex video_list_lock; |
91 | static struct list_head video_bus_head; | |
4be44fcd | 92 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 93 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 94 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 95 | |
1ba90e3a TR |
96 | static const struct acpi_device_id video_device_ids[] = { |
97 | {ACPI_VIDEO_HID, 0}, | |
98 | {"", 0}, | |
99 | }; | |
100 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
101 | ||
1da177e4 | 102 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 103 | .name = "video", |
1da177e4 | 104 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 105 | .ids = video_device_ids, |
1da177e4 LT |
106 | .ops = { |
107 | .add = acpi_video_bus_add, | |
108 | .remove = acpi_video_bus_remove, | |
7015558f | 109 | .notify = acpi_video_bus_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | struct acpi_video_bus_flags { | |
4be44fcd LB |
114 | u8 multihead:1; /* can switch video heads */ |
115 | u8 rom:1; /* can retrieve a video rom */ | |
116 | u8 post:1; /* can configure the head to */ | |
117 | u8 reserved:5; | |
1da177e4 LT |
118 | }; |
119 | ||
120 | struct acpi_video_bus_cap { | |
21fcb34e FC |
121 | u8 _DOS:1; /* Enable/Disable output switching */ |
122 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
123 | u8 _ROM:1; /* Get ROM Data */ | |
124 | u8 _GPD:1; /* Get POST Device */ | |
125 | u8 _SPD:1; /* Set POST Device */ | |
126 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 127 | u8 reserved:2; |
1da177e4 LT |
128 | }; |
129 | ||
4be44fcd LB |
130 | struct acpi_video_device_attrib { |
131 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
132 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
133 | u32 display_type:4; /* Describe the specific type in use */ | |
134 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
135 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
136 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 137 | the VGA device. */ |
21fcb34e FC |
138 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
139 | u32 reserved:10; /* Must be 0 */ | |
140 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_video_enumerated_device { | |
144 | union { | |
145 | u32 int_val; | |
4be44fcd | 146 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
147 | } value; |
148 | struct acpi_video_device *bind_info; | |
149 | }; | |
150 | ||
151 | struct acpi_video_bus { | |
e6afa0de | 152 | struct acpi_device *device; |
99678ed7 | 153 | bool backlight_registered; |
53a92ba7 | 154 | bool backlight_notifier_registered; |
4be44fcd | 155 | u8 dos_setting; |
1da177e4 | 156 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
157 | u8 attached_count; |
158 | struct acpi_video_bus_cap cap; | |
1da177e4 | 159 | struct acpi_video_bus_flags flags; |
4be44fcd | 160 | struct list_head video_device_list; |
bbac81f5 | 161 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 162 | struct list_head entry; |
e9dab196 LY |
163 | struct input_dev *input; |
164 | char phys[32]; /* for input device */ | |
ac7729da | 165 | struct notifier_block pm_nb; |
53a92ba7 | 166 | struct notifier_block backlight_nb; |
1da177e4 LT |
167 | }; |
168 | ||
169 | struct acpi_video_device_flags { | |
4be44fcd LB |
170 | u8 crt:1; |
171 | u8 lcd:1; | |
172 | u8 tvout:1; | |
82cae999 | 173 | u8 dvi:1; |
4be44fcd LB |
174 | u8 bios:1; |
175 | u8 unknown:1; | |
91e13aa3 AL |
176 | u8 notify:1; |
177 | u8 reserved:1; | |
1da177e4 LT |
178 | }; |
179 | ||
180 | struct acpi_video_device_cap { | |
21fcb34e FC |
181 | u8 _ADR:1; /* Return the unique ID */ |
182 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
183 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 184 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 185 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 186 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
187 | }; |
188 | ||
d32f6947 ZR |
189 | struct acpi_video_brightness_flags { |
190 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 191 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 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; | |
8ab58e8e LT |
207 | struct delayed_work switch_brightness_work; |
208 | int switch_brightness_event; | |
4be44fcd LB |
209 | struct acpi_video_bus *video; |
210 | struct acpi_device *dev; | |
1da177e4 | 211 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 212 | struct backlight_device *backlight; |
4a703a8f | 213 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
214 | }; |
215 | ||
b7171ae7 | 216 | static const char device_decode[][30] = { |
1da177e4 LT |
217 | "motherboard VGA device", |
218 | "PCI VGA device", | |
219 | "AGP VGA device", | |
220 | "UNKNOWN", | |
221 | }; | |
222 | ||
4be44fcd LB |
223 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
224 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
225 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
226 | struct acpi_video_device *device); | |
1da177e4 | 227 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
228 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
229 | int level); | |
230 | static int acpi_video_device_lcd_get_level_current( | |
231 | struct acpi_video_device *device, | |
a89803df | 232 | unsigned long long *level, bool raw); |
4be44fcd LB |
233 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
234 | u32 level_current, u32 event); | |
8ab58e8e | 235 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 236 | |
0e9f81d3 AL |
237 | static bool acpi_video_use_native_backlight(void) |
238 | { | |
239 | if (use_native_backlight_param != -1) | |
240 | return use_native_backlight_param; | |
241 | else | |
242 | return use_native_backlight_dmi; | |
243 | } | |
244 | ||
0b9f7d93 | 245 | bool acpi_video_verify_backlight_support(void) |
fbc9fe1b | 246 | { |
0e9f81d3 | 247 | if (acpi_osi_is_win8() && acpi_video_use_native_backlight() && |
fbc9fe1b AL |
248 | backlight_device_registered(BACKLIGHT_RAW)) |
249 | return false; | |
250 | return acpi_video_backlight_support(); | |
251 | } | |
0b9f7d93 | 252 | EXPORT_SYMBOL_GPL(acpi_video_verify_backlight_support); |
fbc9fe1b | 253 | |
21fcb34e | 254 | /* backlight device sysfs support */ |
2f3d000a YL |
255 | static int acpi_video_get_brightness(struct backlight_device *bd) |
256 | { | |
27663c58 | 257 | unsigned long long cur_level; |
38531e6f | 258 | int i; |
7c364e79 | 259 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 260 | |
a89803df | 261 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 262 | return -EINVAL; |
38531e6f MG |
263 | for (i = 2; i < vd->brightness->count; i++) { |
264 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
265 | /* |
266 | * The first two entries are special - see page 575 | |
267 | * of the ACPI spec 3.0 | |
268 | */ | |
915ea7e4 | 269 | return i - 2; |
38531e6f MG |
270 | } |
271 | return 0; | |
2f3d000a YL |
272 | } |
273 | ||
274 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
275 | { | |
24450c7a | 276 | int request_level = bd->props.brightness + 2; |
7c364e79 | 277 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 278 | |
8ab58e8e | 279 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
280 | return acpi_video_device_lcd_set_level(vd, |
281 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
282 | } |
283 | ||
acc2472e | 284 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
285 | .get_brightness = acpi_video_get_brightness, |
286 | .update_status = acpi_video_set_brightness, | |
287 | }; | |
288 | ||
702ed512 | 289 | /* thermal cooling device callbacks */ |
4a703a8f | 290 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 291 | long *state) |
702ed512 | 292 | { |
4a703a8f | 293 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
294 | struct acpi_video_device *video = acpi_driver_data(device); |
295 | ||
6503e5df MG |
296 | *state = video->brightness->count - 3; |
297 | return 0; | |
702ed512 ZR |
298 | } |
299 | ||
4a703a8f | 300 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 301 | long *state) |
702ed512 | 302 | { |
4a703a8f | 303 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 304 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 305 | unsigned long long level; |
6503e5df | 306 | int offset; |
702ed512 | 307 | |
a89803df | 308 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 309 | return -EINVAL; |
6503e5df MG |
310 | for (offset = 2; offset < video->brightness->count; offset++) |
311 | if (level == video->brightness->levels[offset]) { | |
312 | *state = video->brightness->count - offset - 1; | |
313 | return 0; | |
314 | } | |
702ed512 ZR |
315 | |
316 | return -EINVAL; | |
317 | } | |
318 | ||
319 | static int | |
4a703a8f | 320 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 321 | { |
4a703a8f | 322 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
323 | struct acpi_video_device *video = acpi_driver_data(device); |
324 | int level; | |
325 | ||
915ea7e4 | 326 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
327 | return -EINVAL; |
328 | ||
329 | state = video->brightness->count - state; | |
915ea7e4 | 330 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
331 | return acpi_video_device_lcd_set_level(video, level); |
332 | } | |
333 | ||
9c8b04be | 334 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
335 | .get_max_state = video_get_max_state, |
336 | .get_cur_state = video_get_cur_state, | |
337 | .set_cur_state = video_set_cur_state, | |
338 | }; | |
339 | ||
21fcb34e FC |
340 | /* |
341 | * -------------------------------------------------------------------------- | |
342 | * Video Management | |
343 | * -------------------------------------------------------------------------- | |
344 | */ | |
1da177e4 | 345 | |
1da177e4 | 346 | static int |
4be44fcd LB |
347 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
348 | union acpi_object **levels) | |
1da177e4 | 349 | { |
4be44fcd LB |
350 | int status; |
351 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
352 | union acpi_object *obj; | |
1da177e4 | 353 | |
1da177e4 LT |
354 | |
355 | *levels = NULL; | |
356 | ||
90130268 | 357 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 358 | if (!ACPI_SUCCESS(status)) |
d550d98d | 359 | return status; |
4be44fcd | 360 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 361 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 362 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
363 | status = -EFAULT; |
364 | goto err; | |
365 | } | |
366 | ||
367 | *levels = obj; | |
368 | ||
d550d98d | 369 | return 0; |
1da177e4 | 370 | |
915ea7e4 | 371 | err: |
6044ec88 | 372 | kfree(buffer.pointer); |
1da177e4 | 373 | |
d550d98d | 374 | return status; |
1da177e4 LT |
375 | } |
376 | ||
377 | static int | |
4be44fcd | 378 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 379 | { |
24450c7a | 380 | int status; |
9e6dada9 | 381 | int state; |
1da177e4 | 382 | |
0db98202 JL |
383 | status = acpi_execute_simple_method(device->dev->handle, |
384 | "_BCM", level); | |
24450c7a ZR |
385 | if (ACPI_FAILURE(status)) { |
386 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
387 | return -EIO; | |
388 | } | |
389 | ||
4500ca8e | 390 | device->brightness->curr = level; |
9e6dada9 | 391 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 392 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
393 | if (device->backlight) |
394 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
395 | return 0; |
396 | } | |
9e6dada9 | 397 | |
24450c7a ZR |
398 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
399 | return -EINVAL; | |
1da177e4 LT |
400 | } |
401 | ||
45cb50e6 ZR |
402 | /* |
403 | * For some buggy _BQC methods, we need to add a constant value to | |
404 | * the _BQC return value to get the actual current brightness level | |
405 | */ | |
406 | ||
407 | static int bqc_offset_aml_bug_workaround; | |
408 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
409 | { | |
410 | bqc_offset_aml_bug_workaround = 9; | |
411 | return 0; | |
412 | } | |
413 | ||
5f24079b HG |
414 | static int __init video_disable_native_backlight(const struct dmi_system_id *d) |
415 | { | |
416 | use_native_backlight_dmi = false; | |
417 | return 0; | |
418 | } | |
419 | ||
45cb50e6 ZR |
420 | static struct dmi_system_id video_dmi_table[] __initdata = { |
421 | /* | |
422 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
423 | */ | |
424 | { | |
425 | .callback = video_set_bqc_offset, | |
426 | .ident = "Acer Aspire 5720", | |
427 | .matches = { | |
428 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
429 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
430 | }, | |
431 | }, | |
5afc4abe LB |
432 | { |
433 | .callback = video_set_bqc_offset, | |
434 | .ident = "Acer Aspire 5710Z", | |
435 | .matches = { | |
436 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
437 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
438 | }, | |
439 | }, | |
34ac272b ZR |
440 | { |
441 | .callback = video_set_bqc_offset, | |
442 | .ident = "eMachines E510", | |
443 | .matches = { | |
444 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
445 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
446 | }, | |
447 | }, | |
93bcece2 ZR |
448 | { |
449 | .callback = video_set_bqc_offset, | |
450 | .ident = "Acer Aspire 5315", | |
451 | .matches = { | |
452 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
453 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
454 | }, | |
455 | }, | |
152a4e63 ZR |
456 | { |
457 | .callback = video_set_bqc_offset, | |
458 | .ident = "Acer Aspire 7720", | |
459 | .matches = { | |
460 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
461 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
462 | }, | |
463 | }, | |
5f24079b HG |
464 | |
465 | /* | |
466 | * These models have a working acpi_video backlight control, and using | |
467 | * native backlight causes a regression where backlight does not work | |
468 | * when userspace is not handling brightness key events. Disable | |
469 | * native_backlight on these to fix this: | |
470 | * https://bugzilla.kernel.org/show_bug.cgi?id=81691 | |
471 | */ | |
472 | { | |
473 | .callback = video_disable_native_backlight, | |
474 | .ident = "ThinkPad T420", | |
475 | .matches = { | |
476 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
477 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"), | |
478 | }, | |
479 | }, | |
480 | { | |
481 | .callback = video_disable_native_backlight, | |
482 | .ident = "ThinkPad T520", | |
483 | .matches = { | |
484 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
485 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"), | |
486 | }, | |
487 | }, | |
84c34858 HG |
488 | |
489 | /* The native backlight controls do not work on some older machines */ | |
490 | { | |
491 | /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */ | |
492 | .callback = video_disable_native_backlight, | |
493 | .ident = "HP ENVY 15 Notebook", | |
494 | .matches = { | |
495 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
496 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"), | |
497 | }, | |
498 | }, | |
45cb50e6 ZR |
499 | {} |
500 | }; | |
501 | ||
994fa63c DB |
502 | static unsigned long long |
503 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
504 | unsigned long long bqc_value) | |
505 | { | |
506 | unsigned long long level; | |
507 | ||
508 | if (device->brightness->flags._BQC_use_index) { | |
509 | /* | |
510 | * _BQC returns an index that doesn't account for | |
511 | * the first 2 items with special meaning, so we need | |
512 | * to compensate for that by offsetting ourselves | |
513 | */ | |
514 | if (device->brightness->flags._BCL_reversed) | |
515 | bqc_value = device->brightness->count - 3 - bqc_value; | |
516 | ||
517 | level = device->brightness->levels[bqc_value + 2]; | |
518 | } else { | |
519 | level = bqc_value; | |
520 | } | |
521 | ||
522 | level += bqc_offset_aml_bug_workaround; | |
523 | ||
524 | return level; | |
525 | } | |
526 | ||
1da177e4 | 527 | static int |
4be44fcd | 528 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 529 | unsigned long long *level, bool raw) |
1da177e4 | 530 | { |
c8890f90 | 531 | acpi_status status = AE_OK; |
4e231fa4 | 532 | int i; |
c8890f90 | 533 | |
c60d638e ZR |
534 | if (device->cap._BQC || device->cap._BCQ) { |
535 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
536 | ||
537 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
538 | NULL, level); |
539 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
540 | if (raw) { |
541 | /* | |
542 | * Caller has indicated he wants the raw | |
543 | * value returned by _BQC, so don't furtherly | |
544 | * mess with the value. | |
545 | */ | |
546 | return 0; | |
547 | } | |
548 | ||
994fa63c | 549 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 550 | |
4e231fa4 VS |
551 | for (i = 2; i < device->brightness->count; i++) |
552 | if (device->brightness->levels[i] == *level) { | |
553 | device->brightness->curr = *level; | |
554 | return 0; | |
915ea7e4 | 555 | } |
a89803df DB |
556 | /* |
557 | * BQC returned an invalid level. | |
558 | * Stop using it. | |
559 | */ | |
560 | ACPI_WARNING((AE_INFO, | |
561 | "%s returned an invalid level", | |
562 | buf)); | |
563 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 564 | } else { |
21fcb34e FC |
565 | /* |
566 | * Fixme: | |
c8890f90 ZR |
567 | * should we return an error or ignore this failure? |
568 | * dev->brightness->curr is a cached value which stores | |
569 | * the correct current backlight level in most cases. | |
570 | * ACPI video backlight still works w/ buggy _BQC. | |
571 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
572 | */ | |
c60d638e ZR |
573 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
574 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
575 | } |
576 | } | |
577 | ||
4500ca8e | 578 | *level = device->brightness->curr; |
c8890f90 | 579 | return 0; |
1da177e4 LT |
580 | } |
581 | ||
582 | static int | |
4be44fcd LB |
583 | acpi_video_device_EDID(struct acpi_video_device *device, |
584 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 585 | { |
4be44fcd LB |
586 | int status; |
587 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
588 | union acpi_object *obj; | |
589 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
590 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 591 | |
1da177e4 LT |
592 | |
593 | *edid = NULL; | |
594 | ||
595 | if (!device) | |
d550d98d | 596 | return -ENODEV; |
1da177e4 LT |
597 | if (length == 128) |
598 | arg0.integer.value = 1; | |
599 | else if (length == 256) | |
600 | arg0.integer.value = 2; | |
601 | else | |
d550d98d | 602 | return -EINVAL; |
1da177e4 | 603 | |
90130268 | 604 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 605 | if (ACPI_FAILURE(status)) |
d550d98d | 606 | return -ENODEV; |
1da177e4 | 607 | |
50dd0969 | 608 | obj = buffer.pointer; |
1da177e4 LT |
609 | |
610 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
611 | *edid = obj; | |
612 | else { | |
6468463a | 613 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
614 | status = -EFAULT; |
615 | kfree(obj); | |
616 | } | |
617 | ||
d550d98d | 618 | return status; |
1da177e4 LT |
619 | } |
620 | ||
1da177e4 LT |
621 | /* bus */ |
622 | ||
1da177e4 LT |
623 | /* |
624 | * Arg: | |
21fcb34e FC |
625 | * video : video bus device pointer |
626 | * bios_flag : | |
1da177e4 LT |
627 | * 0. The system BIOS should NOT automatically switch(toggle) |
628 | * the active display output. | |
629 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 630 | * active display output. No switch event. |
1da177e4 LT |
631 | * 2. The _DGS value should be locked. |
632 | * 3. The system BIOS should not automatically switch (toggle) the | |
633 | * active display output, but instead generate the display switch | |
634 | * event notify code. | |
635 | * lcd_flag : | |
636 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 637 | * of the LCD when the power changes from AC to DC |
21fcb34e | 638 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 639 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 640 | * Return Value: |
ea9f8856 | 641 | * -EINVAL wrong arg. |
1da177e4 LT |
642 | */ |
643 | ||
644 | static int | |
4be44fcd | 645 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 646 | { |
ea9f8856 | 647 | acpi_status status; |
1da177e4 | 648 | |
b0373843 ZR |
649 | if (!video->cap._DOS) |
650 | return 0; | |
1da177e4 | 651 | |
ea9f8856 IM |
652 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
653 | return -EINVAL; | |
0db98202 JL |
654 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
655 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
656 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
657 | if (ACPI_FAILURE(status)) |
658 | return -EIO; | |
1da177e4 | 659 | |
ea9f8856 | 660 | return 0; |
1da177e4 LT |
661 | } |
662 | ||
935e5f29 ZR |
663 | /* |
664 | * Simple comparison function used to sort backlight levels. | |
665 | */ | |
666 | ||
667 | static int | |
668 | acpi_video_cmp_level(const void *a, const void *b) | |
669 | { | |
670 | return *(int *)a - *(int *)b; | |
671 | } | |
672 | ||
a50188da AL |
673 | /* |
674 | * Decides if _BQC/_BCQ for this system is usable | |
675 | * | |
676 | * We do this by changing the level first and then read out the current | |
677 | * brightness level, if the value does not match, find out if it is using | |
678 | * index. If not, clear the _BQC/_BCQ capability. | |
679 | */ | |
680 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
681 | int max_level, int current_level) | |
682 | { | |
683 | struct acpi_video_device_brightness *br = device->brightness; | |
684 | int result; | |
685 | unsigned long long level; | |
686 | int test_level; | |
687 | ||
688 | /* don't mess with existing known broken systems */ | |
689 | if (bqc_offset_aml_bug_workaround) | |
690 | return 0; | |
691 | ||
692 | /* | |
693 | * Some systems always report current brightness level as maximum | |
694 | * through _BQC, we need to test another value for them. | |
695 | */ | |
b3b301c5 | 696 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
697 | |
698 | result = acpi_video_device_lcd_set_level(device, test_level); | |
699 | if (result) | |
700 | return result; | |
701 | ||
702 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
703 | if (result) | |
704 | return result; | |
705 | ||
706 | if (level != test_level) { | |
707 | /* buggy _BQC found, need to find out if it uses index */ | |
708 | if (level < br->count) { | |
709 | if (br->flags._BCL_reversed) | |
710 | level = br->count - 3 - level; | |
711 | if (br->levels[level + 2] == test_level) | |
712 | br->flags._BQC_use_index = 1; | |
713 | } | |
714 | ||
715 | if (!br->flags._BQC_use_index) | |
716 | device->cap._BQC = device->cap._BCQ = 0; | |
717 | } | |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
722 | ||
1da177e4 | 723 | /* |
21fcb34e FC |
724 | * Arg: |
725 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
726 | * |
727 | * Return Value: | |
469778c1 JJ |
728 | * Maximum brightness level |
729 | * | |
730 | * Allocate and initialize device->brightness. | |
731 | */ | |
732 | ||
733 | static int | |
734 | acpi_video_init_brightness(struct acpi_video_device *device) | |
735 | { | |
736 | union acpi_object *obj = NULL; | |
d32f6947 | 737 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 738 | unsigned long long level, level_old; |
469778c1 JJ |
739 | union acpi_object *o; |
740 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 741 | int result = -EINVAL; |
bd8ba205 | 742 | u32 value; |
469778c1 JJ |
743 | |
744 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
745 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
746 | "LCD brightness level\n")); | |
747 | goto out; | |
748 | } | |
749 | ||
750 | if (obj->package.count < 2) | |
751 | goto out; | |
752 | ||
753 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
754 | if (!br) { | |
755 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 756 | result = -ENOMEM; |
469778c1 JJ |
757 | goto out; |
758 | } | |
759 | ||
d32f6947 | 760 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 761 | GFP_KERNEL); |
1a7c618a ZR |
762 | if (!br->levels) { |
763 | result = -ENOMEM; | |
469778c1 | 764 | goto out_free; |
1a7c618a | 765 | } |
469778c1 JJ |
766 | |
767 | for (i = 0; i < obj->package.count; i++) { | |
768 | o = (union acpi_object *)&obj->package.elements[i]; | |
769 | if (o->type != ACPI_TYPE_INTEGER) { | |
770 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
771 | continue; | |
772 | } | |
bd8ba205 HG |
773 | value = (u32) o->integer.value; |
774 | /* Skip duplicate entries */ | |
775 | if (count > 2 && br->levels[count - 1] == value) | |
776 | continue; | |
777 | ||
778 | br->levels[count] = value; | |
469778c1 JJ |
779 | |
780 | if (br->levels[count] > max_level) | |
781 | max_level = br->levels[count]; | |
782 | count++; | |
783 | } | |
784 | ||
d32f6947 ZR |
785 | /* |
786 | * some buggy BIOS don't export the levels | |
787 | * when machine is on AC/Battery in _BCL package. | |
788 | * In this case, the first two elements in _BCL packages | |
789 | * are also supported brightness levels that OS should take care of. | |
790 | */ | |
90af2cf6 ZR |
791 | for (i = 2; i < count; i++) { |
792 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 793 | level_ac_battery++; |
90af2cf6 ZR |
794 | if (br->levels[i] == br->levels[1]) |
795 | level_ac_battery++; | |
796 | } | |
d32f6947 ZR |
797 | |
798 | if (level_ac_battery < 2) { | |
799 | level_ac_battery = 2 - level_ac_battery; | |
800 | br->flags._BCL_no_ac_battery_levels = 1; | |
801 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
802 | br->levels[i] = br->levels[i - level_ac_battery]; | |
803 | count += level_ac_battery; | |
804 | } else if (level_ac_battery > 2) | |
bf6787eb | 805 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 806 | |
d80fb99f ZR |
807 | /* Check if the _BCL package is in a reversed order */ |
808 | if (max_level == br->levels[2]) { | |
809 | br->flags._BCL_reversed = 1; | |
810 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
811 | acpi_video_cmp_level, NULL); | |
812 | } else if (max_level != br->levels[count - 1]) | |
813 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 814 | "Found unordered _BCL package")); |
469778c1 JJ |
815 | |
816 | br->count = count; | |
817 | device->brightness = br; | |
1a7c618a | 818 | |
1a7c618a | 819 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 820 | br->curr = level = max_level; |
e047cca6 ZR |
821 | |
822 | if (!device->cap._BQC) | |
823 | goto set_level; | |
824 | ||
a89803df DB |
825 | result = acpi_video_device_lcd_get_level_current(device, |
826 | &level_old, true); | |
1a7c618a ZR |
827 | if (result) |
828 | goto out_free_levels; | |
829 | ||
a50188da | 830 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
831 | if (result) |
832 | goto out_free_levels; | |
a50188da AL |
833 | /* |
834 | * cap._BQC may get cleared due to _BQC is found to be broken | |
835 | * in acpi_video_bqc_quirk, so check again here. | |
836 | */ | |
837 | if (!device->cap._BQC) | |
838 | goto set_level; | |
e047cca6 | 839 | |
545ef368 AL |
840 | level = acpi_video_bqc_value_to_level(device, level_old); |
841 | /* | |
842 | * On some buggy laptops, _BQC returns an uninitialized | |
843 | * value when invoked for the first time, i.e. | |
844 | * level_old is invalid (no matter whether it's a level | |
845 | * or an index). Set the backlight to max_level in this case. | |
846 | */ | |
847 | for (i = 2; i < br->count; i++) | |
848 | if (level == br->levels[i]) | |
849 | break; | |
850 | if (i == br->count || !level) | |
851 | level = max_level; | |
e047cca6 | 852 | |
e047cca6 | 853 | set_level: |
90c53ca4 | 854 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
855 | if (result) |
856 | goto out_free_levels; | |
1a7c618a | 857 | |
d32f6947 ZR |
858 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
859 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 860 | kfree(obj); |
1a7c618a | 861 | return result; |
469778c1 JJ |
862 | |
863 | out_free_levels: | |
864 | kfree(br->levels); | |
865 | out_free: | |
866 | kfree(br); | |
867 | out: | |
868 | device->brightness = NULL; | |
869 | kfree(obj); | |
1a7c618a | 870 | return result; |
469778c1 JJ |
871 | } |
872 | ||
873 | /* | |
874 | * Arg: | |
875 | * device : video output device (LCD, CRT, ..) | |
876 | * | |
877 | * Return Value: | |
21fcb34e | 878 | * None |
1da177e4 | 879 | * |
98fb8fe1 | 880 | * Find out all required AML methods defined under the output |
1da177e4 LT |
881 | * device. |
882 | */ | |
883 | ||
4be44fcd | 884 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 885 | { |
952c63e9 | 886 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 887 | device->cap._ADR = 1; |
952c63e9 | 888 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 889 | device->cap._BCL = 1; |
952c63e9 | 890 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 891 | device->cap._BCM = 1; |
952c63e9 | 892 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 893 | device->cap._BQC = 1; |
952c63e9 | 894 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
895 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
896 | device->cap._BCQ = 1; | |
897 | } | |
898 | ||
952c63e9 | 899 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 900 | device->cap._DDC = 1; |
1da177e4 LT |
901 | } |
902 | ||
903 | /* | |
21fcb34e FC |
904 | * Arg: |
905 | * device : video output device (VGA) | |
1da177e4 LT |
906 | * |
907 | * Return Value: | |
21fcb34e | 908 | * None |
1da177e4 | 909 | * |
98fb8fe1 | 910 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
911 | */ |
912 | ||
4be44fcd | 913 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 914 | { |
952c63e9 | 915 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 916 | video->cap._DOS = 1; |
952c63e9 | 917 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 918 | video->cap._DOD = 1; |
952c63e9 | 919 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 920 | video->cap._ROM = 1; |
952c63e9 | 921 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 922 | video->cap._GPD = 1; |
952c63e9 | 923 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 924 | video->cap._SPD = 1; |
952c63e9 | 925 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 926 | video->cap._VPO = 1; |
1da177e4 LT |
927 | } |
928 | ||
929 | /* | |
930 | * Check whether the video bus device has required AML method to | |
931 | * support the desired features | |
932 | */ | |
933 | ||
4be44fcd | 934 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 935 | { |
4be44fcd | 936 | acpi_status status = -ENOENT; |
1e4cffe7 | 937 | struct pci_dev *dev; |
1da177e4 LT |
938 | |
939 | if (!video) | |
d550d98d | 940 | return -EINVAL; |
1da177e4 | 941 | |
1e4cffe7 | 942 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
943 | if (!dev) |
944 | return -ENODEV; | |
1e4cffe7 | 945 | pci_dev_put(dev); |
22c13f9d | 946 | |
21fcb34e FC |
947 | /* |
948 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
949 | * to check well known required nodes. |
950 | */ | |
951 | ||
98fb8fe1 | 952 | /* Does this device support video switching? */ |
3a1151e3 SB |
953 | if (video->cap._DOS || video->cap._DOD) { |
954 | if (!video->cap._DOS) { | |
955 | printk(KERN_WARNING FW_BUG | |
956 | "ACPI(%s) defines _DOD but not _DOS\n", | |
957 | acpi_device_bid(video->device)); | |
958 | } | |
1da177e4 LT |
959 | video->flags.multihead = 1; |
960 | status = 0; | |
961 | } | |
962 | ||
98fb8fe1 | 963 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 964 | if (video->cap._ROM) { |
1da177e4 LT |
965 | video->flags.rom = 1; |
966 | status = 0; | |
967 | } | |
968 | ||
98fb8fe1 | 969 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 970 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
971 | video->flags.post = 1; |
972 | status = 0; | |
973 | } | |
974 | ||
d550d98d | 975 | return status; |
1da177e4 LT |
976 | } |
977 | ||
21fcb34e FC |
978 | /* |
979 | * -------------------------------------------------------------------------- | |
980 | * Driver Interface | |
981 | * -------------------------------------------------------------------------- | |
982 | */ | |
1da177e4 LT |
983 | |
984 | /* device interface */ | |
915ea7e4 | 985 | static struct acpi_video_device_attrib * |
82cae999 RZ |
986 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
987 | { | |
78eed028 DT |
988 | struct acpi_video_enumerated_device *ids; |
989 | int i; | |
990 | ||
991 | for (i = 0; i < video->attached_count; i++) { | |
992 | ids = &video->attached_array[i]; | |
993 | if ((ids->value.int_val & 0xffff) == device_id) | |
994 | return &ids->value.attrib; | |
995 | } | |
82cae999 | 996 | |
82cae999 RZ |
997 | return NULL; |
998 | } | |
1da177e4 | 999 | |
e92a7162 MG |
1000 | static int |
1001 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1002 | unsigned long device_id) | |
1003 | { | |
1004 | struct acpi_video_enumerated_device *ids; | |
1005 | int i; | |
1006 | ||
1007 | for (i = 0; i < video->attached_count; i++) { | |
1008 | ids = &video->attached_array[i]; | |
1009 | if ((ids->value.int_val & 0xffff) == device_id) | |
1010 | return ids->value.int_val; | |
1011 | } | |
1012 | ||
1013 | return 0; | |
1014 | } | |
1015 | ||
1da177e4 | 1016 | static int |
4be44fcd LB |
1017 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1018 | struct acpi_video_bus *video) | |
1da177e4 | 1019 | { |
27663c58 | 1020 | unsigned long long device_id; |
e92a7162 | 1021 | int status, device_type; |
4be44fcd | 1022 | struct acpi_video_device *data; |
915ea7e4 | 1023 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1024 | |
4be44fcd LB |
1025 | status = |
1026 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1027 | /* Some device omits _ADR, we skip them instead of fail */ |
1028 | if (ACPI_FAILURE(status)) | |
1029 | return 0; | |
1da177e4 | 1030 | |
91e13aa3 AL |
1031 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1032 | if (!data) | |
1033 | return -ENOMEM; | |
82cae999 | 1034 | |
91e13aa3 AL |
1035 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1036 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1037 | device->driver_data = data; | |
1038 | ||
1039 | data->device_id = device_id; | |
1040 | data->video = video; | |
1041 | data->dev = device; | |
8ab58e8e LT |
1042 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1043 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1044 | |
1045 | attribute = acpi_video_get_device_attr(video, device_id); | |
1046 | ||
915ea7e4 | 1047 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1048 | switch (attribute->display_type) { |
1049 | case ACPI_VIDEO_DISPLAY_CRT: | |
1050 | data->flags.crt = 1; | |
1051 | break; | |
1052 | case ACPI_VIDEO_DISPLAY_TV: | |
1053 | data->flags.tvout = 1; | |
1054 | break; | |
1055 | case ACPI_VIDEO_DISPLAY_DVI: | |
1056 | data->flags.dvi = 1; | |
1057 | break; | |
1058 | case ACPI_VIDEO_DISPLAY_LCD: | |
1059 | data->flags.lcd = 1; | |
1060 | break; | |
1061 | default: | |
1062 | data->flags.unknown = 1; | |
1063 | break; | |
1064 | } | |
915ea7e4 | 1065 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1066 | data->flags.bios = 1; |
1067 | } else { | |
1068 | /* Check for legacy IDs */ | |
1069 | device_type = acpi_video_get_device_type(video, device_id); | |
1070 | /* Ignore bits 16 and 18-20 */ | |
1071 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1072 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1073 | data->flags.crt = 1; | |
1074 | break; | |
1075 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1076 | data->flags.lcd = 1; | |
1077 | break; | |
1078 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1079 | data->flags.tvout = 1; | |
1080 | break; | |
1081 | default: | |
1082 | data->flags.unknown = 1; | |
e92a7162 | 1083 | } |
91e13aa3 | 1084 | } |
4be44fcd | 1085 | |
91e13aa3 AL |
1086 | acpi_video_device_bind(video, data); |
1087 | acpi_video_device_find_cap(data); | |
1da177e4 | 1088 | |
91e13aa3 AL |
1089 | mutex_lock(&video->device_list_lock); |
1090 | list_add_tail(&data->entry, &video->video_device_list); | |
1091 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1092 | |
91e13aa3 | 1093 | return status; |
1da177e4 LT |
1094 | } |
1095 | ||
1096 | /* | |
1097 | * Arg: | |
21fcb34e | 1098 | * video : video bus device |
1da177e4 LT |
1099 | * |
1100 | * Return: | |
21fcb34e FC |
1101 | * none |
1102 | * | |
1103 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1104 | * bind the ids with the corresponding video devices |
1105 | * under the video bus. | |
4be44fcd | 1106 | */ |
1da177e4 | 1107 | |
4be44fcd | 1108 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1109 | { |
ff102ea9 DT |
1110 | struct acpi_video_device *dev; |
1111 | ||
bbac81f5 | 1112 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1113 | |
1114 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1115 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1116 | |
bbac81f5 | 1117 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1118 | } |
1119 | ||
1120 | /* | |
1121 | * Arg: | |
21fcb34e FC |
1122 | * video : video bus device |
1123 | * device : video output device under the video | |
1124 | * bus | |
1da177e4 LT |
1125 | * |
1126 | * Return: | |
21fcb34e FC |
1127 | * none |
1128 | * | |
1da177e4 LT |
1129 | * Bind the ids with the corresponding video devices |
1130 | * under the video bus. | |
4be44fcd | 1131 | */ |
1da177e4 LT |
1132 | |
1133 | static void | |
4be44fcd LB |
1134 | acpi_video_device_bind(struct acpi_video_bus *video, |
1135 | struct acpi_video_device *device) | |
1da177e4 | 1136 | { |
78eed028 | 1137 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1138 | int i; |
1da177e4 | 1139 | |
78eed028 DT |
1140 | for (i = 0; i < video->attached_count; i++) { |
1141 | ids = &video->attached_array[i]; | |
1142 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1143 | ids->bind_info = device; | |
1da177e4 LT |
1144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1145 | } | |
1146 | } | |
1da177e4 LT |
1147 | } |
1148 | ||
1149 | /* | |
1150 | * Arg: | |
21fcb34e | 1151 | * video : video bus device |
1da177e4 LT |
1152 | * |
1153 | * Return: | |
21fcb34e FC |
1154 | * < 0 : error |
1155 | * | |
1da177e4 LT |
1156 | * Call _DOD to enumerate all devices attached to display adapter |
1157 | * | |
4be44fcd | 1158 | */ |
1da177e4 LT |
1159 | |
1160 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1161 | { | |
4be44fcd LB |
1162 | int status; |
1163 | int count; | |
1164 | int i; | |
78eed028 | 1165 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1166 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1167 | union acpi_object *dod = NULL; | |
1168 | union acpi_object *obj; | |
1da177e4 | 1169 | |
90130268 | 1170 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1171 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1172 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1173 | return status; |
1da177e4 LT |
1174 | } |
1175 | ||
50dd0969 | 1176 | dod = buffer.pointer; |
1da177e4 | 1177 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1178 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1179 | status = -EFAULT; |
1180 | goto out; | |
1181 | } | |
1182 | ||
1183 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1184 | dod->package.count)); |
1da177e4 | 1185 | |
78eed028 DT |
1186 | active_list = kcalloc(1 + dod->package.count, |
1187 | sizeof(struct acpi_video_enumerated_device), | |
1188 | GFP_KERNEL); | |
1189 | if (!active_list) { | |
1da177e4 LT |
1190 | status = -ENOMEM; |
1191 | goto out; | |
1192 | } | |
1193 | ||
1194 | count = 0; | |
1195 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1196 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1197 | |
1198 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1199 | printk(KERN_ERR PREFIX |
1200 | "Invalid _DOD data in element %d\n", i); | |
1201 | continue; | |
1da177e4 | 1202 | } |
78eed028 DT |
1203 | |
1204 | active_list[count].value.int_val = obj->integer.value; | |
1205 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1206 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1207 | (int)obj->integer.value)); | |
1da177e4 LT |
1208 | count++; |
1209 | } | |
1da177e4 | 1210 | |
6044ec88 | 1211 | kfree(video->attached_array); |
4be44fcd | 1212 | |
78eed028 | 1213 | video->attached_array = active_list; |
1da177e4 | 1214 | video->attached_count = count; |
78eed028 | 1215 | |
915ea7e4 | 1216 | out: |
02438d87 | 1217 | kfree(buffer.pointer); |
d550d98d | 1218 | return status; |
1da177e4 LT |
1219 | } |
1220 | ||
4be44fcd LB |
1221 | static int |
1222 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1223 | u32 level_current, u32 event) | |
1da177e4 | 1224 | { |
63f0edfc | 1225 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1226 | max = max_below = 0; |
1227 | min = min_above = 255; | |
63f0edfc | 1228 | /* Find closest level to level_current */ |
0a3db1ce | 1229 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1230 | l = device->brightness->levels[i]; |
1231 | if (abs(l - level_current) < abs(delta)) { | |
1232 | delta = l - level_current; | |
1233 | if (!delta) | |
1234 | break; | |
1235 | } | |
1236 | } | |
1237 | /* Ajust level_current to closest available level */ | |
1238 | level_current += delta; | |
0a3db1ce | 1239 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1240 | l = device->brightness->levels[i]; |
1241 | if (l < min) | |
1242 | min = l; | |
1243 | if (l > max) | |
1244 | max = l; | |
1245 | if (l < min_above && l > level_current) | |
1246 | min_above = l; | |
1247 | if (l > max_below && l < level_current) | |
1248 | max_below = l; | |
1249 | } | |
1250 | ||
1251 | switch (event) { | |
1252 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1253 | return (level_current < max) ? min_above : min; | |
1254 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1255 | return (level_current < max) ? min_above : max; | |
1256 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1257 | return (level_current > min) ? max_below : min; | |
1258 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1259 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1260 | return 0; | |
1261 | default: | |
1262 | return level_current; | |
1263 | } | |
1da177e4 LT |
1264 | } |
1265 | ||
8ab58e8e LT |
1266 | static void |
1267 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1268 | { |
8ab58e8e LT |
1269 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1270 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1271 | unsigned long long level_current, level_next; |
8ab58e8e | 1272 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1273 | int result = -EINVAL; |
1274 | ||
fbc9fe1b AL |
1275 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1276 | if (!acpi_video_verify_backlight_support()) | |
8ab58e8e | 1277 | return; |
28c32e99 | 1278 | |
469778c1 | 1279 | if (!device->brightness) |
c8890f90 ZR |
1280 | goto out; |
1281 | ||
1282 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1283 | &level_current, |
1284 | false); | |
c8890f90 ZR |
1285 | if (result) |
1286 | goto out; | |
1287 | ||
1da177e4 | 1288 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1289 | |
24450c7a | 1290 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1291 | |
36342742 MG |
1292 | if (!result) |
1293 | backlight_force_update(device->backlight, | |
1294 | BACKLIGHT_UPDATE_HOTKEY); | |
1295 | ||
c8890f90 ZR |
1296 | out: |
1297 | if (result) | |
1298 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1299 | } |
1300 | ||
e92a7162 MG |
1301 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1302 | void **edid) | |
1303 | { | |
1304 | struct acpi_video_bus *video; | |
1305 | struct acpi_video_device *video_device; | |
1306 | union acpi_object *buffer = NULL; | |
1307 | acpi_status status; | |
1308 | int i, length; | |
1309 | ||
1310 | if (!device || !acpi_driver_data(device)) | |
1311 | return -EINVAL; | |
1312 | ||
1313 | video = acpi_driver_data(device); | |
1314 | ||
1315 | for (i = 0; i < video->attached_count; i++) { | |
1316 | video_device = video->attached_array[i].bind_info; | |
1317 | length = 256; | |
1318 | ||
1319 | if (!video_device) | |
1320 | continue; | |
1321 | ||
82069552 ZR |
1322 | if (!video_device->cap._DDC) |
1323 | continue; | |
1324 | ||
e92a7162 MG |
1325 | if (type) { |
1326 | switch (type) { | |
1327 | case ACPI_VIDEO_DISPLAY_CRT: | |
1328 | if (!video_device->flags.crt) | |
1329 | continue; | |
1330 | break; | |
1331 | case ACPI_VIDEO_DISPLAY_TV: | |
1332 | if (!video_device->flags.tvout) | |
1333 | continue; | |
1334 | break; | |
1335 | case ACPI_VIDEO_DISPLAY_DVI: | |
1336 | if (!video_device->flags.dvi) | |
1337 | continue; | |
1338 | break; | |
1339 | case ACPI_VIDEO_DISPLAY_LCD: | |
1340 | if (!video_device->flags.lcd) | |
1341 | continue; | |
1342 | break; | |
1343 | } | |
1344 | } else if (video_device->device_id != device_id) { | |
1345 | continue; | |
1346 | } | |
1347 | ||
1348 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1349 | ||
1350 | if (ACPI_FAILURE(status) || !buffer || | |
1351 | buffer->type != ACPI_TYPE_BUFFER) { | |
1352 | length = 128; | |
1353 | status = acpi_video_device_EDID(video_device, &buffer, | |
1354 | length); | |
1355 | if (ACPI_FAILURE(status) || !buffer || | |
1356 | buffer->type != ACPI_TYPE_BUFFER) { | |
1357 | continue; | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | *edid = buffer->buffer.pointer; | |
1362 | return length; | |
1363 | } | |
1364 | ||
1365 | return -ENODEV; | |
1366 | } | |
1367 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1368 | ||
1da177e4 | 1369 | static int |
4be44fcd LB |
1370 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1371 | struct acpi_device *device) | |
1da177e4 | 1372 | { |
fba4e087 | 1373 | int status = 0; |
ff102ea9 | 1374 | struct acpi_device *dev; |
1da177e4 | 1375 | |
fba4e087 IM |
1376 | /* |
1377 | * There are systems where video module known to work fine regardless | |
1378 | * of broken _DOD and ignoring returned value here doesn't cause | |
1379 | * any issues later. | |
1380 | */ | |
1381 | acpi_video_device_enumerate(video); | |
1da177e4 | 1382 | |
ff102ea9 | 1383 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1384 | |
1385 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1386 | if (status) { |
91e13aa3 AL |
1387 | dev_err(&dev->dev, "Can't attach device\n"); |
1388 | break; | |
1da177e4 | 1389 | } |
1da177e4 | 1390 | } |
d550d98d | 1391 | return status; |
1da177e4 LT |
1392 | } |
1393 | ||
1da177e4 LT |
1394 | /* acpi_video interface */ |
1395 | ||
efaa14c7 AL |
1396 | /* |
1397 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1398 | * preform any automatic brightness change on receiving a notification. | |
1399 | */ | |
4be44fcd | 1400 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1401 | { |
efaa14c7 | 1402 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1403 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1404 | } |
1405 | ||
4be44fcd | 1406 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1407 | { |
efaa14c7 | 1408 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1409 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1410 | } |
1411 | ||
7015558f | 1412 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1413 | { |
7015558f | 1414 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1415 | struct input_dev *input; |
17c452f9 | 1416 | int keycode = 0; |
e9dab196 | 1417 | |
67b662e1 | 1418 | if (!video || !video->input) |
d550d98d | 1419 | return; |
1da177e4 | 1420 | |
e9dab196 | 1421 | input = video->input; |
1da177e4 LT |
1422 | |
1423 | switch (event) { | |
98fb8fe1 | 1424 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1425 | * most likely via hotkey. */ |
8a37c65d | 1426 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1427 | break; |
1428 | ||
98fb8fe1 | 1429 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1430 | * connector. */ |
1431 | acpi_video_device_enumerate(video); | |
1432 | acpi_video_device_rebind(video); | |
e9dab196 | 1433 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1434 | break; |
1435 | ||
4be44fcd | 1436 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1437 | keycode = KEY_SWITCHVIDEOMODE; |
1438 | break; | |
4be44fcd | 1439 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1440 | keycode = KEY_VIDEO_NEXT; |
1441 | break; | |
4be44fcd | 1442 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1443 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1444 | break; |
1445 | ||
1446 | default: | |
1447 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1448 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1449 | break; |
1450 | } | |
1451 | ||
8a37c65d LT |
1452 | if (acpi_notifier_call_chain(device, event, 0)) |
1453 | /* Something vetoed the keypress. */ | |
1454 | keycode = 0; | |
17c452f9 MG |
1455 | |
1456 | if (keycode) { | |
1457 | input_report_key(input, keycode, 1); | |
1458 | input_sync(input); | |
1459 | input_report_key(input, keycode, 0); | |
1460 | input_sync(input); | |
1461 | } | |
e9dab196 | 1462 | |
d550d98d | 1463 | return; |
1da177e4 LT |
1464 | } |
1465 | ||
8ab58e8e LT |
1466 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1467 | u32 event) | |
1468 | { | |
1469 | if (!brightness_switch_enabled) | |
1470 | return; | |
1471 | ||
1472 | video_device->switch_brightness_event = event; | |
1473 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1474 | } | |
1475 | ||
4be44fcd | 1476 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1477 | { |
50dd0969 | 1478 | struct acpi_video_device *video_device = data; |
4be44fcd | 1479 | struct acpi_device *device = NULL; |
e9dab196 LY |
1480 | struct acpi_video_bus *bus; |
1481 | struct input_dev *input; | |
17c452f9 | 1482 | int keycode = 0; |
1da177e4 | 1483 | |
1da177e4 | 1484 | if (!video_device) |
d550d98d | 1485 | return; |
1da177e4 | 1486 | |
e6afa0de | 1487 | device = video_device->dev; |
e9dab196 LY |
1488 | bus = video_device->video; |
1489 | input = bus->input; | |
1da177e4 LT |
1490 | |
1491 | switch (event) { | |
4be44fcd | 1492 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1493 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1494 | keycode = KEY_BRIGHTNESS_CYCLE; |
1495 | break; | |
4be44fcd | 1496 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1497 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1498 | keycode = KEY_BRIGHTNESSUP; |
1499 | break; | |
4be44fcd | 1500 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1501 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1502 | keycode = KEY_BRIGHTNESSDOWN; |
1503 | break; | |
70f23fd6 | 1504 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1505 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1506 | keycode = KEY_BRIGHTNESS_ZERO; |
1507 | break; | |
4be44fcd | 1508 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1509 | brightness_switch_event(video_device, event); |
e9dab196 | 1510 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1511 | break; |
1512 | default: | |
1513 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1514 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1515 | break; |
1516 | } | |
e9dab196 | 1517 | |
7761f638 | 1518 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1519 | |
1520 | if (keycode) { | |
1521 | input_report_key(input, keycode, 1); | |
1522 | input_sync(input); | |
1523 | input_report_key(input, keycode, 0); | |
1524 | input_sync(input); | |
1525 | } | |
e9dab196 | 1526 | |
d550d98d | 1527 | return; |
1da177e4 LT |
1528 | } |
1529 | ||
ac7729da RW |
1530 | static int acpi_video_resume(struct notifier_block *nb, |
1531 | unsigned long val, void *ign) | |
863c1490 MG |
1532 | { |
1533 | struct acpi_video_bus *video; | |
1534 | struct acpi_video_device *video_device; | |
1535 | int i; | |
1536 | ||
ac7729da RW |
1537 | switch (val) { |
1538 | case PM_HIBERNATION_PREPARE: | |
1539 | case PM_SUSPEND_PREPARE: | |
1540 | case PM_RESTORE_PREPARE: | |
1541 | return NOTIFY_DONE; | |
1542 | } | |
863c1490 | 1543 | |
ac7729da RW |
1544 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1545 | ||
1546 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1547 | |
1548 | for (i = 0; i < video->attached_count; i++) { | |
1549 | video_device = video->attached_array[i].bind_info; | |
1550 | if (video_device && video_device->backlight) | |
1551 | acpi_video_set_brightness(video_device->backlight); | |
1552 | } | |
ac7729da RW |
1553 | |
1554 | return NOTIFY_OK; | |
863c1490 MG |
1555 | } |
1556 | ||
c504f8cb ZR |
1557 | static acpi_status |
1558 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1559 | void **return_value) | |
1560 | { | |
1561 | struct acpi_device *device = context; | |
1562 | struct acpi_device *sibling; | |
1563 | int result; | |
1564 | ||
1565 | if (handle == device->handle) | |
1566 | return AE_CTRL_TERMINATE; | |
1567 | ||
1568 | result = acpi_bus_get_device(handle, &sibling); | |
1569 | if (result) | |
1570 | return AE_OK; | |
1571 | ||
1572 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1573 | return AE_ALREADY_EXISTS; | |
1574 | ||
1575 | return AE_OK; | |
1576 | } | |
1577 | ||
67b662e1 AL |
1578 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1579 | { | |
99678ed7 HG |
1580 | struct backlight_properties props; |
1581 | struct pci_dev *pdev; | |
1582 | acpi_handle acpi_parent; | |
1583 | struct device *parent = NULL; | |
1584 | int result; | |
1585 | static int count; | |
1586 | char *name; | |
67b662e1 | 1587 | |
99678ed7 HG |
1588 | result = acpi_video_init_brightness(device); |
1589 | if (result) | |
1590 | return; | |
1591 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1592 | if (!name) | |
1593 | return; | |
1594 | count++; | |
67b662e1 | 1595 | |
99678ed7 | 1596 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1597 | |
99678ed7 HG |
1598 | pdev = acpi_get_pci_dev(acpi_parent); |
1599 | if (pdev) { | |
1600 | parent = &pdev->dev; | |
1601 | pci_dev_put(pdev); | |
1602 | } | |
67b662e1 | 1603 | |
99678ed7 HG |
1604 | memset(&props, 0, sizeof(struct backlight_properties)); |
1605 | props.type = BACKLIGHT_FIRMWARE; | |
1606 | props.max_brightness = device->brightness->count - 3; | |
1607 | device->backlight = backlight_device_register(name, | |
1608 | parent, | |
1609 | device, | |
1610 | &acpi_backlight_ops, | |
1611 | &props); | |
1612 | kfree(name); | |
1613 | if (IS_ERR(device->backlight)) | |
1614 | return; | |
67b662e1 | 1615 | |
99678ed7 HG |
1616 | /* |
1617 | * Save current brightness level in case we have to restore it | |
1618 | * before acpi_video_device_lcd_set_level() is called next time. | |
1619 | */ | |
1620 | device->backlight->props.brightness = | |
1621 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1622 | |
99678ed7 HG |
1623 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1624 | device->dev, &video_cooling_ops); | |
1625 | if (IS_ERR(device->cooling_dev)) { | |
1626 | /* | |
1627 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1628 | * Also, why the hell we are returning early and not attempt to | |
1629 | * register video output if cooling device registration failed? | |
1630 | * -- dtor | |
1631 | */ | |
1632 | device->cooling_dev = NULL; | |
1633 | return; | |
67b662e1 | 1634 | } |
99678ed7 HG |
1635 | |
1636 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1637 | device->cooling_dev->id); | |
1638 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1639 | &device->cooling_dev->device.kobj, | |
1640 | "thermal_cooling"); | |
1641 | if (result) | |
1642 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1643 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1644 | &device->dev->dev.kobj, "device"); | |
1645 | if (result) | |
1646 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1647 | } |
1648 | ||
1649 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) | |
1650 | { | |
1651 | struct acpi_video_device *dev; | |
1652 | ||
53a92ba7 HG |
1653 | if (video->backlight_registered) |
1654 | return 0; | |
1655 | ||
99678ed7 HG |
1656 | if (!acpi_video_verify_backlight_support()) |
1657 | return 0; | |
1658 | ||
67b662e1 AL |
1659 | mutex_lock(&video->device_list_lock); |
1660 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1661 | acpi_video_dev_register_backlight(dev); | |
1662 | mutex_unlock(&video->device_list_lock); | |
1663 | ||
99678ed7 HG |
1664 | video->backlight_registered = true; |
1665 | ||
67b662e1 AL |
1666 | video->pm_nb.notifier_call = acpi_video_resume; |
1667 | video->pm_nb.priority = 0; | |
1668 | return register_pm_notifier(&video->pm_nb); | |
1669 | } | |
1670 | ||
1671 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1672 | { | |
1673 | if (device->backlight) { | |
1674 | backlight_device_unregister(device->backlight); | |
1675 | device->backlight = NULL; | |
1676 | } | |
1677 | if (device->brightness) { | |
1678 | kfree(device->brightness->levels); | |
1679 | kfree(device->brightness); | |
1680 | device->brightness = NULL; | |
1681 | } | |
1682 | if (device->cooling_dev) { | |
1683 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1684 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1685 | thermal_cooling_device_unregister(device->cooling_dev); | |
1686 | device->cooling_dev = NULL; | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1691 | { | |
1692 | struct acpi_video_device *dev; | |
99678ed7 HG |
1693 | int error; |
1694 | ||
1695 | if (!video->backlight_registered) | |
1696 | return 0; | |
1697 | ||
1698 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1699 | |
1700 | mutex_lock(&video->device_list_lock); | |
1701 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1702 | acpi_video_dev_unregister_backlight(dev); | |
1703 | mutex_unlock(&video->device_list_lock); | |
1704 | ||
99678ed7 HG |
1705 | video->backlight_registered = false; |
1706 | ||
67b662e1 AL |
1707 | return error; |
1708 | } | |
1709 | ||
1710 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1711 | { | |
1712 | acpi_status status; | |
1713 | struct acpi_device *adev = device->dev; | |
1714 | ||
1715 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1716 | acpi_video_device_notify, device); | |
1717 | if (ACPI_FAILURE(status)) | |
1718 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1719 | else | |
1720 | device->flags.notify = 1; | |
1721 | } | |
1722 | ||
1723 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1724 | { | |
1725 | struct input_dev *input; | |
1726 | struct acpi_video_device *dev; | |
1727 | int error; | |
1728 | ||
1729 | video->input = input = input_allocate_device(); | |
1730 | if (!input) { | |
1731 | error = -ENOMEM; | |
1732 | goto out; | |
1733 | } | |
1734 | ||
1735 | error = acpi_video_bus_start_devices(video); | |
1736 | if (error) | |
1737 | goto err_free_input; | |
1738 | ||
1739 | snprintf(video->phys, sizeof(video->phys), | |
1740 | "%s/video/input0", acpi_device_hid(video->device)); | |
1741 | ||
1742 | input->name = acpi_device_name(video->device); | |
1743 | input->phys = video->phys; | |
1744 | input->id.bustype = BUS_HOST; | |
1745 | input->id.product = 0x06; | |
1746 | input->dev.parent = &video->device->dev; | |
1747 | input->evbit[0] = BIT(EV_KEY); | |
1748 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1749 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1750 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1751 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1752 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1753 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1754 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1755 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1756 | ||
1757 | error = input_register_device(input); | |
1758 | if (error) | |
1759 | goto err_stop_dev; | |
1760 | ||
1761 | mutex_lock(&video->device_list_lock); | |
1762 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1763 | acpi_video_dev_add_notify_handler(dev); | |
1764 | mutex_unlock(&video->device_list_lock); | |
1765 | ||
1766 | return 0; | |
1767 | ||
1768 | err_stop_dev: | |
1769 | acpi_video_bus_stop_devices(video); | |
1770 | err_free_input: | |
1771 | input_free_device(input); | |
1772 | video->input = NULL; | |
1773 | out: | |
1774 | return error; | |
1775 | } | |
1776 | ||
1777 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1778 | { | |
1779 | if (dev->flags.notify) { | |
1780 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1781 | acpi_video_device_notify); | |
1782 | dev->flags.notify = 0; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1787 | { | |
1788 | struct acpi_video_device *dev; | |
1789 | ||
1790 | mutex_lock(&video->device_list_lock); | |
1791 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1792 | acpi_video_dev_remove_notify_handler(dev); | |
1793 | mutex_unlock(&video->device_list_lock); | |
1794 | ||
1795 | acpi_video_bus_stop_devices(video); | |
1796 | input_unregister_device(video->input); | |
1797 | video->input = NULL; | |
1798 | } | |
1799 | ||
53a92ba7 HG |
1800 | static int acpi_video_backlight_notify(struct notifier_block *nb, |
1801 | unsigned long val, void *bd) | |
1802 | { | |
1803 | struct backlight_device *backlight = bd; | |
1804 | struct acpi_video_bus *video; | |
1805 | ||
1806 | /* acpi_video_verify_backlight_support only cares about raw devices */ | |
1807 | if (backlight->props.type != BACKLIGHT_RAW) | |
1808 | return NOTIFY_DONE; | |
1809 | ||
1810 | video = container_of(nb, struct acpi_video_bus, backlight_nb); | |
1811 | ||
1812 | switch (val) { | |
1813 | case BACKLIGHT_REGISTERED: | |
1814 | if (!acpi_video_verify_backlight_support()) | |
1815 | acpi_video_bus_unregister_backlight(video); | |
1816 | break; | |
1817 | case BACKLIGHT_UNREGISTERED: | |
1818 | acpi_video_bus_register_backlight(video); | |
1819 | break; | |
1820 | } | |
1821 | ||
1822 | return NOTIFY_OK; | |
1823 | } | |
1824 | ||
1825 | static int acpi_video_bus_add_backlight_notify_handler( | |
1826 | struct acpi_video_bus *video) | |
1827 | { | |
1828 | int error; | |
1829 | ||
1830 | video->backlight_nb.notifier_call = acpi_video_backlight_notify; | |
1831 | video->backlight_nb.priority = 0; | |
1832 | error = backlight_register_notifier(&video->backlight_nb); | |
1833 | if (error == 0) | |
1834 | video->backlight_notifier_registered = true; | |
1835 | ||
1836 | return error; | |
1837 | } | |
1838 | ||
1839 | static int acpi_video_bus_remove_backlight_notify_handler( | |
1840 | struct acpi_video_bus *video) | |
1841 | { | |
1842 | if (!video->backlight_notifier_registered) | |
1843 | return 0; | |
1844 | ||
1845 | video->backlight_notifier_registered = false; | |
1846 | ||
1847 | return backlight_unregister_notifier(&video->backlight_nb); | |
1848 | } | |
1849 | ||
67b662e1 AL |
1850 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1851 | { | |
1852 | struct acpi_video_device *dev, *next; | |
1853 | ||
1854 | mutex_lock(&video->device_list_lock); | |
1855 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1856 | list_del(&dev->entry); | |
1857 | kfree(dev); | |
1858 | } | |
1859 | mutex_unlock(&video->device_list_lock); | |
1860 | ||
1861 | return 0; | |
1862 | } | |
1863 | ||
ac7729da RW |
1864 | static int instance; |
1865 | ||
4be44fcd | 1866 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1867 | { |
f51e8391 | 1868 | struct acpi_video_bus *video; |
f51e8391 | 1869 | int error; |
c504f8cb ZR |
1870 | acpi_status status; |
1871 | ||
1872 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1873 | device->parent->handle, 1, | |
1874 | acpi_video_bus_match, NULL, | |
1875 | device, NULL); | |
1876 | if (status == AE_ALREADY_EXISTS) { | |
1877 | printk(KERN_WARNING FW_BUG | |
1878 | "Duplicate ACPI video bus devices for the" | |
1879 | " same VGA controller, please try module " | |
1880 | "parameter \"video.allow_duplicates=1\"" | |
1881 | "if the current driver doesn't work.\n"); | |
1882 | if (!allow_duplicates) | |
1883 | return -ENODEV; | |
1884 | } | |
1da177e4 | 1885 | |
36bcbec7 | 1886 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1887 | if (!video) |
d550d98d | 1888 | return -ENOMEM; |
1da177e4 | 1889 | |
e6d9da1d ZR |
1890 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1891 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1892 | if (instance) | |
1893 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1894 | instance++; |
e6d9da1d | 1895 | } |
f3b39f13 ZY |
1896 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1897 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1898 | if (instance) | |
1899 | device->pnp.bus_id[3] = '0' + instance; | |
1900 | instance++; | |
1901 | } | |
e6d9da1d | 1902 | |
e6afa0de | 1903 | video->device = device; |
1da177e4 LT |
1904 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1905 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1906 | device->driver_data = video; |
1da177e4 LT |
1907 | |
1908 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1909 | error = acpi_video_bus_check(video); |
1910 | if (error) | |
1911 | goto err_free_video; | |
1da177e4 | 1912 | |
bbac81f5 | 1913 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1914 | INIT_LIST_HEAD(&video->video_device_list); |
1915 | ||
ea9f8856 IM |
1916 | error = acpi_video_bus_get_devices(video, device); |
1917 | if (error) | |
91e13aa3 | 1918 | goto err_put_video; |
1da177e4 | 1919 | |
1da177e4 | 1920 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1921 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1922 | video->flags.multihead ? "yes" : "no", | |
1923 | video->flags.rom ? "yes" : "no", | |
1924 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1925 | mutex_lock(&video_list_lock); |
1926 | list_add_tail(&video->entry, &video_bus_head); | |
1927 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1928 | |
67b662e1 AL |
1929 | acpi_video_bus_register_backlight(video); |
1930 | acpi_video_bus_add_notify_handler(video); | |
53a92ba7 | 1931 | acpi_video_bus_add_backlight_notify_handler(video); |
ac7729da | 1932 | |
f51e8391 DT |
1933 | return 0; |
1934 | ||
67b662e1 | 1935 | err_put_video: |
f51e8391 DT |
1936 | acpi_video_bus_put_devices(video); |
1937 | kfree(video->attached_array); | |
67b662e1 | 1938 | err_free_video: |
f51e8391 | 1939 | kfree(video); |
db89b4f0 | 1940 | device->driver_data = NULL; |
1da177e4 | 1941 | |
f51e8391 | 1942 | return error; |
1da177e4 LT |
1943 | } |
1944 | ||
51fac838 | 1945 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1946 | { |
4be44fcd | 1947 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1948 | |
1da177e4 LT |
1949 | |
1950 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1951 | return -EINVAL; |
1da177e4 | 1952 | |
50dd0969 | 1953 | video = acpi_driver_data(device); |
1da177e4 | 1954 | |
53a92ba7 | 1955 | acpi_video_bus_remove_backlight_notify_handler(video); |
67b662e1 AL |
1956 | acpi_video_bus_remove_notify_handler(video); |
1957 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1958 | acpi_video_bus_put_devices(video); |
1da177e4 | 1959 | |
67b662e1 AL |
1960 | mutex_lock(&video_list_lock); |
1961 | list_del(&video->entry); | |
1962 | mutex_unlock(&video_list_lock); | |
1963 | ||
6044ec88 | 1964 | kfree(video->attached_array); |
1da177e4 LT |
1965 | kfree(video); |
1966 | ||
d550d98d | 1967 | return 0; |
1da177e4 LT |
1968 | } |
1969 | ||
c6996bdd AC |
1970 | static int __init is_i740(struct pci_dev *dev) |
1971 | { | |
1972 | if (dev->device == 0x00D1) | |
1973 | return 1; | |
1974 | if (dev->device == 0x7000) | |
1975 | return 1; | |
1976 | return 0; | |
1977 | } | |
1978 | ||
74a365b3 MG |
1979 | static int __init intel_opregion_present(void) |
1980 | { | |
c6996bdd | 1981 | int opregion = 0; |
74a365b3 MG |
1982 | struct pci_dev *dev = NULL; |
1983 | u32 address; | |
1984 | ||
1985 | for_each_pci_dev(dev) { | |
1986 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1987 | continue; | |
1988 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1989 | continue; | |
c6996bdd AC |
1990 | /* We don't want to poke around undefined i740 registers */ |
1991 | if (is_i740(dev)) | |
1992 | continue; | |
74a365b3 MG |
1993 | pci_read_config_dword(dev, 0xfc, &address); |
1994 | if (!address) | |
1995 | continue; | |
c6996bdd | 1996 | opregion = 1; |
74a365b3 | 1997 | } |
c6996bdd | 1998 | return opregion; |
74a365b3 MG |
1999 | } |
2000 | ||
8e5c2b77 | 2001 | int acpi_video_register(void) |
1da177e4 | 2002 | { |
8e5c2b77 | 2003 | int result = 0; |
86e437f0 ZY |
2004 | if (register_count) { |
2005 | /* | |
8e5c2b77 RW |
2006 | * if the function of acpi_video_register is already called, |
2007 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
2008 | */ |
2009 | return 0; | |
2010 | } | |
1da177e4 | 2011 | |
67b662e1 AL |
2012 | mutex_init(&video_list_lock); |
2013 | INIT_LIST_HEAD(&video_bus_head); | |
2014 | ||
1da177e4 | 2015 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 2016 | if (result < 0) |
d550d98d | 2017 | return -ENODEV; |
1da177e4 | 2018 | |
86e437f0 ZY |
2019 | /* |
2020 | * When the acpi_video_bus is loaded successfully, increase | |
2021 | * the counter reference. | |
2022 | */ | |
2023 | register_count = 1; | |
2024 | ||
d550d98d | 2025 | return 0; |
1da177e4 | 2026 | } |
8e5c2b77 | 2027 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2028 | |
86e437f0 ZY |
2029 | void acpi_video_unregister(void) |
2030 | { | |
2031 | if (!register_count) { | |
2032 | /* | |
2033 | * If the acpi video bus is already unloaded, don't | |
2034 | * unload it again and return directly. | |
2035 | */ | |
2036 | return; | |
2037 | } | |
2038 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2039 | ||
86e437f0 ZY |
2040 | register_count = 0; |
2041 | ||
2042 | return; | |
2043 | } | |
2044 | EXPORT_SYMBOL(acpi_video_unregister); | |
2045 | ||
1b7f37e1 HG |
2046 | void acpi_video_unregister_backlight(void) |
2047 | { | |
2048 | struct acpi_video_bus *video; | |
2049 | ||
2050 | if (!register_count) | |
2051 | return; | |
2052 | ||
2053 | mutex_lock(&video_list_lock); | |
2054 | list_for_each_entry(video, &video_bus_head, entry) | |
2055 | acpi_video_bus_unregister_backlight(video); | |
2056 | mutex_unlock(&video_list_lock); | |
2057 | } | |
2058 | EXPORT_SYMBOL(acpi_video_unregister_backlight); | |
2059 | ||
74a365b3 MG |
2060 | /* |
2061 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2062 | * the video opregion code to be run first in order to initialise | |
2063 | * state before any ACPI video calls are made. To handle this we defer | |
2064 | * registration of the video class until the opregion code has run. | |
2065 | */ | |
2066 | ||
2067 | static int __init acpi_video_init(void) | |
2068 | { | |
45cb50e6 ZR |
2069 | dmi_check_system(video_dmi_table); |
2070 | ||
74a365b3 MG |
2071 | if (intel_opregion_present()) |
2072 | return 0; | |
2073 | ||
2074 | return acpi_video_register(); | |
2075 | } | |
1da177e4 | 2076 | |
86e437f0 | 2077 | static void __exit acpi_video_exit(void) |
1da177e4 | 2078 | { |
86e437f0 | 2079 | acpi_video_unregister(); |
1da177e4 | 2080 | |
d550d98d | 2081 | return; |
1da177e4 LT |
2082 | } |
2083 | ||
2084 | module_init(acpi_video_init); | |
2085 | module_exit(acpi_video_exit); |