Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/list.h> | |
bbac81f5 | 32 | #include <linux/mutex.h> |
e9dab196 | 33 | #include <linux/input.h> |
2f3d000a | 34 | #include <linux/backlight.h> |
702ed512 | 35 | #include <linux/thermal.h> |
935e5f29 | 36 | #include <linux/sort.h> |
74a365b3 MG |
37 | #include <linux/pci.h> |
38 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
eb27cae8 | 40 | #include <linux/dmi.h> |
ac7729da | 41 | #include <linux/suspend.h> |
8b48463f | 42 | #include <linux/acpi.h> |
e92a7162 | 43 | #include <acpi/video.h> |
8b48463f | 44 | #include <asm/uaccess.h> |
1da177e4 | 45 | |
8c5bd7ad RW |
46 | #include "internal.h" |
47 | ||
a192a958 LB |
48 | #define PREFIX "ACPI: " |
49 | ||
1da177e4 LT |
50 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
51 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
52 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
53 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
54 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
55 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
56 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
57 | ||
f4715189 TT |
58 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
59 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
60 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
61 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
62 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 63 | |
2f3d000a | 64 | #define MAX_NAME_LEN 20 |
1da177e4 | 65 | |
1da177e4 | 66 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 67 | ACPI_MODULE_NAME("video"); |
1da177e4 | 68 | |
f52fd66d | 69 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 70 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
71 | MODULE_LICENSE("GPL"); |
72 | ||
90ab5ee9 | 73 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
74 | module_param(brightness_switch_enabled, bool, 0644); |
75 | ||
c504f8cb ZR |
76 | /* |
77 | * By default, we don't allow duplicate ACPI video bus devices | |
78 | * under the same VGA controller | |
79 | */ | |
90ab5ee9 | 80 | static bool allow_duplicates; |
c504f8cb ZR |
81 | module_param(allow_duplicates, bool, 0644); |
82 | ||
fbc9fe1b | 83 | /* |
0e9f81d3 AL |
84 | * For Windows 8 systems: used to decide if video module |
85 | * should skip registering backlight interface of its own. | |
fbc9fe1b | 86 | */ |
0e9f81d3 AL |
87 | static int use_native_backlight_param = -1; |
88 | module_param_named(use_native_backlight, use_native_backlight_param, int, 0444); | |
89 | static bool use_native_backlight_dmi = false; | |
fbc9fe1b | 90 | |
915ea7e4 | 91 | static int register_count; |
67b662e1 AL |
92 | static struct mutex video_list_lock; |
93 | static struct list_head video_bus_head; | |
4be44fcd | 94 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 95 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 96 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 97 | |
1ba90e3a TR |
98 | static const struct acpi_device_id video_device_ids[] = { |
99 | {ACPI_VIDEO_HID, 0}, | |
100 | {"", 0}, | |
101 | }; | |
102 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
103 | ||
1da177e4 | 104 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 105 | .name = "video", |
1da177e4 | 106 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 107 | .ids = video_device_ids, |
1da177e4 LT |
108 | .ops = { |
109 | .add = acpi_video_bus_add, | |
110 | .remove = acpi_video_bus_remove, | |
7015558f | 111 | .notify = acpi_video_bus_notify, |
4be44fcd | 112 | }, |
1da177e4 LT |
113 | }; |
114 | ||
115 | struct acpi_video_bus_flags { | |
4be44fcd LB |
116 | u8 multihead:1; /* can switch video heads */ |
117 | u8 rom:1; /* can retrieve a video rom */ | |
118 | u8 post:1; /* can configure the head to */ | |
119 | u8 reserved:5; | |
1da177e4 LT |
120 | }; |
121 | ||
122 | struct acpi_video_bus_cap { | |
21fcb34e FC |
123 | u8 _DOS:1; /* Enable/Disable output switching */ |
124 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
125 | u8 _ROM:1; /* Get ROM Data */ | |
126 | u8 _GPD:1; /* Get POST Device */ | |
127 | u8 _SPD:1; /* Set POST Device */ | |
128 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 129 | u8 reserved:2; |
1da177e4 LT |
130 | }; |
131 | ||
4be44fcd LB |
132 | struct acpi_video_device_attrib { |
133 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
134 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
135 | u32 display_type:4; /* Describe the specific type in use */ | |
136 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
137 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
138 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 139 | the VGA device. */ |
21fcb34e FC |
140 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
141 | u32 reserved:10; /* Must be 0 */ | |
142 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
143 | }; |
144 | ||
145 | struct acpi_video_enumerated_device { | |
146 | union { | |
147 | u32 int_val; | |
4be44fcd | 148 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
149 | } value; |
150 | struct acpi_video_device *bind_info; | |
151 | }; | |
152 | ||
153 | struct acpi_video_bus { | |
e6afa0de | 154 | struct acpi_device *device; |
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; |
1da177e4 LT |
166 | }; |
167 | ||
168 | struct acpi_video_device_flags { | |
4be44fcd LB |
169 | u8 crt:1; |
170 | u8 lcd:1; | |
171 | u8 tvout:1; | |
82cae999 | 172 | u8 dvi:1; |
4be44fcd LB |
173 | u8 bios:1; |
174 | u8 unknown:1; | |
91e13aa3 AL |
175 | u8 notify:1; |
176 | u8 reserved:1; | |
1da177e4 LT |
177 | }; |
178 | ||
179 | struct acpi_video_device_cap { | |
21fcb34e FC |
180 | u8 _ADR:1; /* Return the unique ID */ |
181 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
182 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 183 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 184 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 185 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
186 | }; |
187 | ||
d32f6947 ZR |
188 | struct acpi_video_brightness_flags { |
189 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 190 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 191 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
192 | }; |
193 | ||
1da177e4 | 194 | struct acpi_video_device_brightness { |
4be44fcd LB |
195 | int curr; |
196 | int count; | |
197 | int *levels; | |
d32f6947 | 198 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
199 | }; |
200 | ||
201 | struct acpi_video_device { | |
4be44fcd LB |
202 | unsigned long device_id; |
203 | struct acpi_video_device_flags flags; | |
204 | struct acpi_video_device_cap cap; | |
205 | struct list_head entry; | |
206 | struct acpi_video_bus *video; | |
207 | struct acpi_device *dev; | |
1da177e4 | 208 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 209 | struct backlight_device *backlight; |
4a703a8f | 210 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
211 | }; |
212 | ||
b7171ae7 | 213 | static const char device_decode[][30] = { |
1da177e4 LT |
214 | "motherboard VGA device", |
215 | "PCI VGA device", | |
216 | "AGP VGA device", | |
217 | "UNKNOWN", | |
218 | }; | |
219 | ||
4be44fcd LB |
220 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
221 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
222 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
223 | struct acpi_video_device *device); | |
1da177e4 | 224 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
225 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
226 | int level); | |
227 | static int acpi_video_device_lcd_get_level_current( | |
228 | struct acpi_video_device *device, | |
a89803df | 229 | unsigned long long *level, bool raw); |
4be44fcd LB |
230 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
231 | u32 level_current, u32 event); | |
c8890f90 | 232 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 233 | int event); |
1da177e4 | 234 | |
0e9f81d3 AL |
235 | static bool acpi_video_use_native_backlight(void) |
236 | { | |
237 | if (use_native_backlight_param != -1) | |
238 | return use_native_backlight_param; | |
239 | else | |
240 | return use_native_backlight_dmi; | |
241 | } | |
242 | ||
fbc9fe1b AL |
243 | static bool acpi_video_verify_backlight_support(void) |
244 | { | |
0e9f81d3 | 245 | if (acpi_osi_is_win8() && acpi_video_use_native_backlight() && |
fbc9fe1b AL |
246 | backlight_device_registered(BACKLIGHT_RAW)) |
247 | return false; | |
248 | return acpi_video_backlight_support(); | |
249 | } | |
250 | ||
21fcb34e | 251 | /* backlight device sysfs support */ |
2f3d000a YL |
252 | static int acpi_video_get_brightness(struct backlight_device *bd) |
253 | { | |
27663c58 | 254 | unsigned long long cur_level; |
38531e6f | 255 | int i; |
7c364e79 | 256 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 257 | |
a89803df | 258 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 259 | return -EINVAL; |
38531e6f MG |
260 | for (i = 2; i < vd->brightness->count; i++) { |
261 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
262 | /* |
263 | * The first two entries are special - see page 575 | |
264 | * of the ACPI spec 3.0 | |
265 | */ | |
915ea7e4 | 266 | return i - 2; |
38531e6f MG |
267 | } |
268 | return 0; | |
2f3d000a YL |
269 | } |
270 | ||
271 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
272 | { | |
24450c7a | 273 | int request_level = bd->props.brightness + 2; |
7c364e79 | 274 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a ZR |
275 | |
276 | return acpi_video_device_lcd_set_level(vd, | |
277 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
278 | } |
279 | ||
acc2472e | 280 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
281 | .get_brightness = acpi_video_get_brightness, |
282 | .update_status = acpi_video_set_brightness, | |
283 | }; | |
284 | ||
702ed512 | 285 | /* thermal cooling device callbacks */ |
4a703a8f | 286 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 287 | long *state) |
702ed512 | 288 | { |
4a703a8f | 289 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
290 | struct acpi_video_device *video = acpi_driver_data(device); |
291 | ||
6503e5df MG |
292 | *state = video->brightness->count - 3; |
293 | return 0; | |
702ed512 ZR |
294 | } |
295 | ||
4a703a8f | 296 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 297 | long *state) |
702ed512 | 298 | { |
4a703a8f | 299 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 300 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 301 | unsigned long long level; |
6503e5df | 302 | int offset; |
702ed512 | 303 | |
a89803df | 304 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 305 | return -EINVAL; |
6503e5df MG |
306 | for (offset = 2; offset < video->brightness->count; offset++) |
307 | if (level == video->brightness->levels[offset]) { | |
308 | *state = video->brightness->count - offset - 1; | |
309 | return 0; | |
310 | } | |
702ed512 ZR |
311 | |
312 | return -EINVAL; | |
313 | } | |
314 | ||
315 | static int | |
4a703a8f | 316 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 317 | { |
4a703a8f | 318 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
319 | struct acpi_video_device *video = acpi_driver_data(device); |
320 | int level; | |
321 | ||
915ea7e4 | 322 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
323 | return -EINVAL; |
324 | ||
325 | state = video->brightness->count - state; | |
915ea7e4 | 326 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
327 | return acpi_video_device_lcd_set_level(video, level); |
328 | } | |
329 | ||
9c8b04be | 330 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
331 | .get_max_state = video_get_max_state, |
332 | .get_cur_state = video_get_cur_state, | |
333 | .set_cur_state = video_set_cur_state, | |
334 | }; | |
335 | ||
21fcb34e FC |
336 | /* |
337 | * -------------------------------------------------------------------------- | |
338 | * Video Management | |
339 | * -------------------------------------------------------------------------- | |
340 | */ | |
1da177e4 | 341 | |
1da177e4 | 342 | static int |
4be44fcd LB |
343 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
344 | union acpi_object **levels) | |
1da177e4 | 345 | { |
4be44fcd LB |
346 | int status; |
347 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
348 | union acpi_object *obj; | |
1da177e4 | 349 | |
1da177e4 LT |
350 | |
351 | *levels = NULL; | |
352 | ||
90130268 | 353 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 354 | if (!ACPI_SUCCESS(status)) |
d550d98d | 355 | return status; |
4be44fcd | 356 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 357 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 358 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
359 | status = -EFAULT; |
360 | goto err; | |
361 | } | |
362 | ||
363 | *levels = obj; | |
364 | ||
d550d98d | 365 | return 0; |
1da177e4 | 366 | |
915ea7e4 | 367 | err: |
6044ec88 | 368 | kfree(buffer.pointer); |
1da177e4 | 369 | |
d550d98d | 370 | return status; |
1da177e4 LT |
371 | } |
372 | ||
373 | static int | |
4be44fcd | 374 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 375 | { |
24450c7a | 376 | int status; |
9e6dada9 | 377 | int state; |
1da177e4 | 378 | |
0db98202 JL |
379 | status = acpi_execute_simple_method(device->dev->handle, |
380 | "_BCM", level); | |
24450c7a ZR |
381 | if (ACPI_FAILURE(status)) { |
382 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
383 | return -EIO; | |
384 | } | |
385 | ||
4500ca8e | 386 | device->brightness->curr = level; |
9e6dada9 | 387 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 388 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
389 | if (device->backlight) |
390 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
391 | return 0; |
392 | } | |
9e6dada9 | 393 | |
24450c7a ZR |
394 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
395 | return -EINVAL; | |
1da177e4 LT |
396 | } |
397 | ||
45cb50e6 ZR |
398 | /* |
399 | * For some buggy _BQC methods, we need to add a constant value to | |
400 | * the _BQC return value to get the actual current brightness level | |
401 | */ | |
402 | ||
403 | static int bqc_offset_aml_bug_workaround; | |
404 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
405 | { | |
406 | bqc_offset_aml_bug_workaround = 9; | |
407 | return 0; | |
408 | } | |
409 | ||
0e9f81d3 AL |
410 | static int __init video_set_use_native_backlight(const struct dmi_system_id *d) |
411 | { | |
412 | use_native_backlight_dmi = true; | |
413 | return 0; | |
414 | } | |
415 | ||
45cb50e6 ZR |
416 | static struct dmi_system_id video_dmi_table[] __initdata = { |
417 | /* | |
418 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
419 | */ | |
420 | { | |
421 | .callback = video_set_bqc_offset, | |
422 | .ident = "Acer Aspire 5720", | |
423 | .matches = { | |
424 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
425 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
426 | }, | |
427 | }, | |
5afc4abe LB |
428 | { |
429 | .callback = video_set_bqc_offset, | |
430 | .ident = "Acer Aspire 5710Z", | |
431 | .matches = { | |
432 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
433 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
434 | }, | |
435 | }, | |
34ac272b ZR |
436 | { |
437 | .callback = video_set_bqc_offset, | |
438 | .ident = "eMachines E510", | |
439 | .matches = { | |
440 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
441 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
442 | }, | |
443 | }, | |
93bcece2 ZR |
444 | { |
445 | .callback = video_set_bqc_offset, | |
446 | .ident = "Acer Aspire 5315", | |
447 | .matches = { | |
448 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
449 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
450 | }, | |
451 | }, | |
152a4e63 ZR |
452 | { |
453 | .callback = video_set_bqc_offset, | |
454 | .ident = "Acer Aspire 7720", | |
455 | .matches = { | |
456 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
457 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
458 | }, | |
459 | }, | |
0e9f81d3 AL |
460 | { |
461 | .callback = video_set_use_native_backlight, | |
462 | .ident = "ThinkPad T430s", | |
463 | .matches = { | |
464 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
465 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430s"), | |
466 | }, | |
467 | }, | |
468 | { | |
469 | .callback = video_set_use_native_backlight, | |
470 | .ident = "ThinkPad X230", | |
471 | .matches = { | |
472 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
473 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"), | |
474 | }, | |
475 | }, | |
476 | { | |
477 | .callback = video_set_use_native_backlight, | |
478 | .ident = "ThinkPad X1 Carbon", | |
479 | .matches = { | |
480 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
481 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"), | |
482 | }, | |
483 | }, | |
484 | { | |
485 | .callback = video_set_use_native_backlight, | |
486 | .ident = "Lenovo Yoga 13", | |
487 | .matches = { | |
488 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
489 | DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"), | |
490 | }, | |
491 | }, | |
492 | { | |
493 | .callback = video_set_use_native_backlight, | |
494 | .ident = "Dell Inspiron 7520", | |
495 | .matches = { | |
496 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
497 | DMI_MATCH(DMI_PRODUCT_VERSION, "Inspiron 7520"), | |
498 | }, | |
499 | }, | |
500 | { | |
501 | .callback = video_set_use_native_backlight, | |
502 | .ident = "Acer Aspire 5733Z", | |
503 | .matches = { | |
504 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
505 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5733Z"), | |
506 | }, | |
507 | }, | |
508 | { | |
509 | .callback = video_set_use_native_backlight, | |
510 | .ident = "Acer Aspire V5-431", | |
511 | .matches = { | |
512 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
513 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-431"), | |
514 | }, | |
515 | }, | |
516 | { | |
517 | .callback = video_set_use_native_backlight, | |
518 | .ident = "HP ProBook 4340s", | |
519 | .matches = { | |
520 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
521 | DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4340s"), | |
522 | }, | |
523 | }, | |
524 | { | |
525 | .callback = video_set_use_native_backlight, | |
526 | .ident = "HP ProBook 2013 models", | |
527 | .matches = { | |
528 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
529 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook "), | |
530 | DMI_MATCH(DMI_PRODUCT_NAME, " G1"), | |
531 | }, | |
532 | }, | |
533 | { | |
534 | .callback = video_set_use_native_backlight, | |
535 | .ident = "HP EliteBook 2013 models", | |
536 | .matches = { | |
537 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
538 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "), | |
539 | DMI_MATCH(DMI_PRODUCT_NAME, " G1"), | |
540 | }, | |
541 | }, | |
542 | { | |
543 | .callback = video_set_use_native_backlight, | |
544 | .ident = "HP ZBook 14", | |
545 | .matches = { | |
546 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
547 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 14"), | |
548 | }, | |
549 | }, | |
550 | { | |
551 | .callback = video_set_use_native_backlight, | |
552 | .ident = "HP ZBook 15", | |
553 | .matches = { | |
554 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
555 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 15"), | |
556 | }, | |
557 | }, | |
558 | { | |
559 | .callback = video_set_use_native_backlight, | |
560 | .ident = "HP ZBook 17", | |
561 | .matches = { | |
562 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
563 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 17"), | |
564 | }, | |
565 | }, | |
566 | { | |
567 | .callback = video_set_use_native_backlight, | |
568 | .ident = "HP EliteBook 8780w", | |
569 | .matches = { | |
570 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
571 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"), | |
572 | }, | |
573 | }, | |
45cb50e6 ZR |
574 | {} |
575 | }; | |
576 | ||
994fa63c DB |
577 | static unsigned long long |
578 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
579 | unsigned long long bqc_value) | |
580 | { | |
581 | unsigned long long level; | |
582 | ||
583 | if (device->brightness->flags._BQC_use_index) { | |
584 | /* | |
585 | * _BQC returns an index that doesn't account for | |
586 | * the first 2 items with special meaning, so we need | |
587 | * to compensate for that by offsetting ourselves | |
588 | */ | |
589 | if (device->brightness->flags._BCL_reversed) | |
590 | bqc_value = device->brightness->count - 3 - bqc_value; | |
591 | ||
592 | level = device->brightness->levels[bqc_value + 2]; | |
593 | } else { | |
594 | level = bqc_value; | |
595 | } | |
596 | ||
597 | level += bqc_offset_aml_bug_workaround; | |
598 | ||
599 | return level; | |
600 | } | |
601 | ||
1da177e4 | 602 | static int |
4be44fcd | 603 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 604 | unsigned long long *level, bool raw) |
1da177e4 | 605 | { |
c8890f90 | 606 | acpi_status status = AE_OK; |
4e231fa4 | 607 | int i; |
c8890f90 | 608 | |
c60d638e ZR |
609 | if (device->cap._BQC || device->cap._BCQ) { |
610 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
611 | ||
612 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
613 | NULL, level); |
614 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
615 | if (raw) { |
616 | /* | |
617 | * Caller has indicated he wants the raw | |
618 | * value returned by _BQC, so don't furtherly | |
619 | * mess with the value. | |
620 | */ | |
621 | return 0; | |
622 | } | |
623 | ||
994fa63c | 624 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 625 | |
4e231fa4 VS |
626 | for (i = 2; i < device->brightness->count; i++) |
627 | if (device->brightness->levels[i] == *level) { | |
628 | device->brightness->curr = *level; | |
629 | return 0; | |
915ea7e4 | 630 | } |
a89803df DB |
631 | /* |
632 | * BQC returned an invalid level. | |
633 | * Stop using it. | |
634 | */ | |
635 | ACPI_WARNING((AE_INFO, | |
636 | "%s returned an invalid level", | |
637 | buf)); | |
638 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 639 | } else { |
21fcb34e FC |
640 | /* |
641 | * Fixme: | |
c8890f90 ZR |
642 | * should we return an error or ignore this failure? |
643 | * dev->brightness->curr is a cached value which stores | |
644 | * the correct current backlight level in most cases. | |
645 | * ACPI video backlight still works w/ buggy _BQC. | |
646 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
647 | */ | |
c60d638e ZR |
648 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
649 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
650 | } |
651 | } | |
652 | ||
4500ca8e | 653 | *level = device->brightness->curr; |
c8890f90 | 654 | return 0; |
1da177e4 LT |
655 | } |
656 | ||
657 | static int | |
4be44fcd LB |
658 | acpi_video_device_EDID(struct acpi_video_device *device, |
659 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 660 | { |
4be44fcd LB |
661 | int status; |
662 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
663 | union acpi_object *obj; | |
664 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
665 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 666 | |
1da177e4 LT |
667 | |
668 | *edid = NULL; | |
669 | ||
670 | if (!device) | |
d550d98d | 671 | return -ENODEV; |
1da177e4 LT |
672 | if (length == 128) |
673 | arg0.integer.value = 1; | |
674 | else if (length == 256) | |
675 | arg0.integer.value = 2; | |
676 | else | |
d550d98d | 677 | return -EINVAL; |
1da177e4 | 678 | |
90130268 | 679 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 680 | if (ACPI_FAILURE(status)) |
d550d98d | 681 | return -ENODEV; |
1da177e4 | 682 | |
50dd0969 | 683 | obj = buffer.pointer; |
1da177e4 LT |
684 | |
685 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
686 | *edid = obj; | |
687 | else { | |
6468463a | 688 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
689 | status = -EFAULT; |
690 | kfree(obj); | |
691 | } | |
692 | ||
d550d98d | 693 | return status; |
1da177e4 LT |
694 | } |
695 | ||
1da177e4 LT |
696 | /* bus */ |
697 | ||
1da177e4 LT |
698 | /* |
699 | * Arg: | |
21fcb34e FC |
700 | * video : video bus device pointer |
701 | * bios_flag : | |
1da177e4 LT |
702 | * 0. The system BIOS should NOT automatically switch(toggle) |
703 | * the active display output. | |
704 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 705 | * active display output. No switch event. |
1da177e4 LT |
706 | * 2. The _DGS value should be locked. |
707 | * 3. The system BIOS should not automatically switch (toggle) the | |
708 | * active display output, but instead generate the display switch | |
709 | * event notify code. | |
710 | * lcd_flag : | |
711 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 712 | * of the LCD when the power changes from AC to DC |
21fcb34e | 713 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 714 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 715 | * Return Value: |
ea9f8856 | 716 | * -EINVAL wrong arg. |
1da177e4 LT |
717 | */ |
718 | ||
719 | static int | |
4be44fcd | 720 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 721 | { |
ea9f8856 | 722 | acpi_status status; |
1da177e4 | 723 | |
b0373843 ZR |
724 | if (!video->cap._DOS) |
725 | return 0; | |
1da177e4 | 726 | |
ea9f8856 IM |
727 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
728 | return -EINVAL; | |
0db98202 JL |
729 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
730 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
731 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
732 | if (ACPI_FAILURE(status)) |
733 | return -EIO; | |
1da177e4 | 734 | |
ea9f8856 | 735 | return 0; |
1da177e4 LT |
736 | } |
737 | ||
935e5f29 ZR |
738 | /* |
739 | * Simple comparison function used to sort backlight levels. | |
740 | */ | |
741 | ||
742 | static int | |
743 | acpi_video_cmp_level(const void *a, const void *b) | |
744 | { | |
745 | return *(int *)a - *(int *)b; | |
746 | } | |
747 | ||
a50188da AL |
748 | /* |
749 | * Decides if _BQC/_BCQ for this system is usable | |
750 | * | |
751 | * We do this by changing the level first and then read out the current | |
752 | * brightness level, if the value does not match, find out if it is using | |
753 | * index. If not, clear the _BQC/_BCQ capability. | |
754 | */ | |
755 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
756 | int max_level, int current_level) | |
757 | { | |
758 | struct acpi_video_device_brightness *br = device->brightness; | |
759 | int result; | |
760 | unsigned long long level; | |
761 | int test_level; | |
762 | ||
763 | /* don't mess with existing known broken systems */ | |
764 | if (bqc_offset_aml_bug_workaround) | |
765 | return 0; | |
766 | ||
767 | /* | |
768 | * Some systems always report current brightness level as maximum | |
769 | * through _BQC, we need to test another value for them. | |
770 | */ | |
b3b301c5 | 771 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
772 | |
773 | result = acpi_video_device_lcd_set_level(device, test_level); | |
774 | if (result) | |
775 | return result; | |
776 | ||
777 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
778 | if (result) | |
779 | return result; | |
780 | ||
781 | if (level != test_level) { | |
782 | /* buggy _BQC found, need to find out if it uses index */ | |
783 | if (level < br->count) { | |
784 | if (br->flags._BCL_reversed) | |
785 | level = br->count - 3 - level; | |
786 | if (br->levels[level + 2] == test_level) | |
787 | br->flags._BQC_use_index = 1; | |
788 | } | |
789 | ||
790 | if (!br->flags._BQC_use_index) | |
791 | device->cap._BQC = device->cap._BCQ = 0; | |
792 | } | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
797 | ||
1da177e4 | 798 | /* |
21fcb34e FC |
799 | * Arg: |
800 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
801 | * |
802 | * Return Value: | |
469778c1 JJ |
803 | * Maximum brightness level |
804 | * | |
805 | * Allocate and initialize device->brightness. | |
806 | */ | |
807 | ||
808 | static int | |
809 | acpi_video_init_brightness(struct acpi_video_device *device) | |
810 | { | |
811 | union acpi_object *obj = NULL; | |
d32f6947 | 812 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 813 | unsigned long long level, level_old; |
469778c1 JJ |
814 | union acpi_object *o; |
815 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 816 | int result = -EINVAL; |
bd8ba205 | 817 | u32 value; |
469778c1 JJ |
818 | |
819 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
820 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
821 | "LCD brightness level\n")); | |
822 | goto out; | |
823 | } | |
824 | ||
825 | if (obj->package.count < 2) | |
826 | goto out; | |
827 | ||
828 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
829 | if (!br) { | |
830 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 831 | result = -ENOMEM; |
469778c1 JJ |
832 | goto out; |
833 | } | |
834 | ||
d32f6947 | 835 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 836 | GFP_KERNEL); |
1a7c618a ZR |
837 | if (!br->levels) { |
838 | result = -ENOMEM; | |
469778c1 | 839 | goto out_free; |
1a7c618a | 840 | } |
469778c1 JJ |
841 | |
842 | for (i = 0; i < obj->package.count; i++) { | |
843 | o = (union acpi_object *)&obj->package.elements[i]; | |
844 | if (o->type != ACPI_TYPE_INTEGER) { | |
845 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
846 | continue; | |
847 | } | |
bd8ba205 HG |
848 | value = (u32) o->integer.value; |
849 | /* Skip duplicate entries */ | |
850 | if (count > 2 && br->levels[count - 1] == value) | |
851 | continue; | |
852 | ||
853 | br->levels[count] = value; | |
469778c1 JJ |
854 | |
855 | if (br->levels[count] > max_level) | |
856 | max_level = br->levels[count]; | |
857 | count++; | |
858 | } | |
859 | ||
d32f6947 ZR |
860 | /* |
861 | * some buggy BIOS don't export the levels | |
862 | * when machine is on AC/Battery in _BCL package. | |
863 | * In this case, the first two elements in _BCL packages | |
864 | * are also supported brightness levels that OS should take care of. | |
865 | */ | |
90af2cf6 ZR |
866 | for (i = 2; i < count; i++) { |
867 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 868 | level_ac_battery++; |
90af2cf6 ZR |
869 | if (br->levels[i] == br->levels[1]) |
870 | level_ac_battery++; | |
871 | } | |
d32f6947 ZR |
872 | |
873 | if (level_ac_battery < 2) { | |
874 | level_ac_battery = 2 - level_ac_battery; | |
875 | br->flags._BCL_no_ac_battery_levels = 1; | |
876 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
877 | br->levels[i] = br->levels[i - level_ac_battery]; | |
878 | count += level_ac_battery; | |
879 | } else if (level_ac_battery > 2) | |
bf6787eb | 880 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 881 | |
d80fb99f ZR |
882 | /* Check if the _BCL package is in a reversed order */ |
883 | if (max_level == br->levels[2]) { | |
884 | br->flags._BCL_reversed = 1; | |
885 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
886 | acpi_video_cmp_level, NULL); | |
887 | } else if (max_level != br->levels[count - 1]) | |
888 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 889 | "Found unordered _BCL package")); |
469778c1 JJ |
890 | |
891 | br->count = count; | |
892 | device->brightness = br; | |
1a7c618a | 893 | |
1a7c618a | 894 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 895 | br->curr = level = max_level; |
e047cca6 ZR |
896 | |
897 | if (!device->cap._BQC) | |
898 | goto set_level; | |
899 | ||
a89803df DB |
900 | result = acpi_video_device_lcd_get_level_current(device, |
901 | &level_old, true); | |
1a7c618a ZR |
902 | if (result) |
903 | goto out_free_levels; | |
904 | ||
a50188da | 905 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
906 | if (result) |
907 | goto out_free_levels; | |
a50188da AL |
908 | /* |
909 | * cap._BQC may get cleared due to _BQC is found to be broken | |
910 | * in acpi_video_bqc_quirk, so check again here. | |
911 | */ | |
912 | if (!device->cap._BQC) | |
913 | goto set_level; | |
e047cca6 | 914 | |
545ef368 AL |
915 | level = acpi_video_bqc_value_to_level(device, level_old); |
916 | /* | |
917 | * On some buggy laptops, _BQC returns an uninitialized | |
918 | * value when invoked for the first time, i.e. | |
919 | * level_old is invalid (no matter whether it's a level | |
920 | * or an index). Set the backlight to max_level in this case. | |
921 | */ | |
922 | for (i = 2; i < br->count; i++) | |
923 | if (level == br->levels[i]) | |
924 | break; | |
925 | if (i == br->count || !level) | |
926 | level = max_level; | |
e047cca6 | 927 | |
e047cca6 | 928 | set_level: |
90c53ca4 | 929 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
930 | if (result) |
931 | goto out_free_levels; | |
1a7c618a | 932 | |
d32f6947 ZR |
933 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
934 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 935 | kfree(obj); |
1a7c618a | 936 | return result; |
469778c1 JJ |
937 | |
938 | out_free_levels: | |
939 | kfree(br->levels); | |
940 | out_free: | |
941 | kfree(br); | |
942 | out: | |
943 | device->brightness = NULL; | |
944 | kfree(obj); | |
1a7c618a | 945 | return result; |
469778c1 JJ |
946 | } |
947 | ||
948 | /* | |
949 | * Arg: | |
950 | * device : video output device (LCD, CRT, ..) | |
951 | * | |
952 | * Return Value: | |
21fcb34e | 953 | * None |
1da177e4 | 954 | * |
98fb8fe1 | 955 | * Find out all required AML methods defined under the output |
1da177e4 LT |
956 | * device. |
957 | */ | |
958 | ||
4be44fcd | 959 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 960 | { |
952c63e9 | 961 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 962 | device->cap._ADR = 1; |
952c63e9 | 963 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 964 | device->cap._BCL = 1; |
952c63e9 | 965 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 966 | device->cap._BCM = 1; |
952c63e9 | 967 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 968 | device->cap._BQC = 1; |
952c63e9 | 969 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
970 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
971 | device->cap._BCQ = 1; | |
972 | } | |
973 | ||
952c63e9 | 974 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 975 | device->cap._DDC = 1; |
1da177e4 LT |
976 | } |
977 | ||
978 | /* | |
21fcb34e FC |
979 | * Arg: |
980 | * device : video output device (VGA) | |
1da177e4 LT |
981 | * |
982 | * Return Value: | |
21fcb34e | 983 | * None |
1da177e4 | 984 | * |
98fb8fe1 | 985 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
986 | */ |
987 | ||
4be44fcd | 988 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 989 | { |
952c63e9 | 990 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 991 | video->cap._DOS = 1; |
952c63e9 | 992 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 993 | video->cap._DOD = 1; |
952c63e9 | 994 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 995 | video->cap._ROM = 1; |
952c63e9 | 996 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 997 | video->cap._GPD = 1; |
952c63e9 | 998 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 999 | video->cap._SPD = 1; |
952c63e9 | 1000 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 1001 | video->cap._VPO = 1; |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | /* | |
1005 | * Check whether the video bus device has required AML method to | |
1006 | * support the desired features | |
1007 | */ | |
1008 | ||
4be44fcd | 1009 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1010 | { |
4be44fcd | 1011 | acpi_status status = -ENOENT; |
1e4cffe7 | 1012 | struct pci_dev *dev; |
1da177e4 LT |
1013 | |
1014 | if (!video) | |
d550d98d | 1015 | return -EINVAL; |
1da177e4 | 1016 | |
1e4cffe7 | 1017 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1018 | if (!dev) |
1019 | return -ENODEV; | |
1e4cffe7 | 1020 | pci_dev_put(dev); |
22c13f9d | 1021 | |
21fcb34e FC |
1022 | /* |
1023 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1024 | * to check well known required nodes. |
1025 | */ | |
1026 | ||
98fb8fe1 | 1027 | /* Does this device support video switching? */ |
3a1151e3 SB |
1028 | if (video->cap._DOS || video->cap._DOD) { |
1029 | if (!video->cap._DOS) { | |
1030 | printk(KERN_WARNING FW_BUG | |
1031 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1032 | acpi_device_bid(video->device)); | |
1033 | } | |
1da177e4 LT |
1034 | video->flags.multihead = 1; |
1035 | status = 0; | |
1036 | } | |
1037 | ||
98fb8fe1 | 1038 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1039 | if (video->cap._ROM) { |
1da177e4 LT |
1040 | video->flags.rom = 1; |
1041 | status = 0; | |
1042 | } | |
1043 | ||
98fb8fe1 | 1044 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1045 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1046 | video->flags.post = 1; |
1047 | status = 0; | |
1048 | } | |
1049 | ||
d550d98d | 1050 | return status; |
1da177e4 LT |
1051 | } |
1052 | ||
21fcb34e FC |
1053 | /* |
1054 | * -------------------------------------------------------------------------- | |
1055 | * Driver Interface | |
1056 | * -------------------------------------------------------------------------- | |
1057 | */ | |
1da177e4 LT |
1058 | |
1059 | /* device interface */ | |
915ea7e4 | 1060 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1061 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1062 | { | |
78eed028 DT |
1063 | struct acpi_video_enumerated_device *ids; |
1064 | int i; | |
1065 | ||
1066 | for (i = 0; i < video->attached_count; i++) { | |
1067 | ids = &video->attached_array[i]; | |
1068 | if ((ids->value.int_val & 0xffff) == device_id) | |
1069 | return &ids->value.attrib; | |
1070 | } | |
82cae999 | 1071 | |
82cae999 RZ |
1072 | return NULL; |
1073 | } | |
1da177e4 | 1074 | |
e92a7162 MG |
1075 | static int |
1076 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1077 | unsigned long device_id) | |
1078 | { | |
1079 | struct acpi_video_enumerated_device *ids; | |
1080 | int i; | |
1081 | ||
1082 | for (i = 0; i < video->attached_count; i++) { | |
1083 | ids = &video->attached_array[i]; | |
1084 | if ((ids->value.int_val & 0xffff) == device_id) | |
1085 | return ids->value.int_val; | |
1086 | } | |
1087 | ||
1088 | return 0; | |
1089 | } | |
1090 | ||
1da177e4 | 1091 | static int |
4be44fcd LB |
1092 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1093 | struct acpi_video_bus *video) | |
1da177e4 | 1094 | { |
27663c58 | 1095 | unsigned long long device_id; |
e92a7162 | 1096 | int status, device_type; |
4be44fcd | 1097 | struct acpi_video_device *data; |
915ea7e4 | 1098 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1099 | |
4be44fcd LB |
1100 | status = |
1101 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1102 | /* Some device omits _ADR, we skip them instead of fail */ |
1103 | if (ACPI_FAILURE(status)) | |
1104 | return 0; | |
1da177e4 | 1105 | |
91e13aa3 AL |
1106 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1107 | if (!data) | |
1108 | return -ENOMEM; | |
82cae999 | 1109 | |
91e13aa3 AL |
1110 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1111 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1112 | device->driver_data = data; | |
1113 | ||
1114 | data->device_id = device_id; | |
1115 | data->video = video; | |
1116 | data->dev = device; | |
1117 | ||
1118 | attribute = acpi_video_get_device_attr(video, device_id); | |
1119 | ||
915ea7e4 | 1120 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1121 | switch (attribute->display_type) { |
1122 | case ACPI_VIDEO_DISPLAY_CRT: | |
1123 | data->flags.crt = 1; | |
1124 | break; | |
1125 | case ACPI_VIDEO_DISPLAY_TV: | |
1126 | data->flags.tvout = 1; | |
1127 | break; | |
1128 | case ACPI_VIDEO_DISPLAY_DVI: | |
1129 | data->flags.dvi = 1; | |
1130 | break; | |
1131 | case ACPI_VIDEO_DISPLAY_LCD: | |
1132 | data->flags.lcd = 1; | |
1133 | break; | |
1134 | default: | |
1135 | data->flags.unknown = 1; | |
1136 | break; | |
1137 | } | |
915ea7e4 | 1138 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1139 | data->flags.bios = 1; |
1140 | } else { | |
1141 | /* Check for legacy IDs */ | |
1142 | device_type = acpi_video_get_device_type(video, device_id); | |
1143 | /* Ignore bits 16 and 18-20 */ | |
1144 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1145 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1146 | data->flags.crt = 1; | |
1147 | break; | |
1148 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1149 | data->flags.lcd = 1; | |
1150 | break; | |
1151 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1152 | data->flags.tvout = 1; | |
1153 | break; | |
1154 | default: | |
1155 | data->flags.unknown = 1; | |
e92a7162 | 1156 | } |
91e13aa3 | 1157 | } |
4be44fcd | 1158 | |
91e13aa3 AL |
1159 | acpi_video_device_bind(video, data); |
1160 | acpi_video_device_find_cap(data); | |
1da177e4 | 1161 | |
91e13aa3 AL |
1162 | mutex_lock(&video->device_list_lock); |
1163 | list_add_tail(&data->entry, &video->video_device_list); | |
1164 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1165 | |
91e13aa3 | 1166 | return status; |
1da177e4 LT |
1167 | } |
1168 | ||
1169 | /* | |
1170 | * Arg: | |
21fcb34e | 1171 | * video : video bus device |
1da177e4 LT |
1172 | * |
1173 | * Return: | |
21fcb34e FC |
1174 | * none |
1175 | * | |
1176 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1177 | * bind the ids with the corresponding video devices |
1178 | * under the video bus. | |
4be44fcd | 1179 | */ |
1da177e4 | 1180 | |
4be44fcd | 1181 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1182 | { |
ff102ea9 DT |
1183 | struct acpi_video_device *dev; |
1184 | ||
bbac81f5 | 1185 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1186 | |
1187 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1188 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1189 | |
bbac81f5 | 1190 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | /* | |
1194 | * Arg: | |
21fcb34e FC |
1195 | * video : video bus device |
1196 | * device : video output device under the video | |
1197 | * bus | |
1da177e4 LT |
1198 | * |
1199 | * Return: | |
21fcb34e FC |
1200 | * none |
1201 | * | |
1da177e4 LT |
1202 | * Bind the ids with the corresponding video devices |
1203 | * under the video bus. | |
4be44fcd | 1204 | */ |
1da177e4 LT |
1205 | |
1206 | static void | |
4be44fcd LB |
1207 | acpi_video_device_bind(struct acpi_video_bus *video, |
1208 | struct acpi_video_device *device) | |
1da177e4 | 1209 | { |
78eed028 | 1210 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1211 | int i; |
1da177e4 | 1212 | |
78eed028 DT |
1213 | for (i = 0; i < video->attached_count; i++) { |
1214 | ids = &video->attached_array[i]; | |
1215 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1216 | ids->bind_info = device; | |
1da177e4 LT |
1217 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1218 | } | |
1219 | } | |
1da177e4 LT |
1220 | } |
1221 | ||
1222 | /* | |
1223 | * Arg: | |
21fcb34e | 1224 | * video : video bus device |
1da177e4 LT |
1225 | * |
1226 | * Return: | |
21fcb34e FC |
1227 | * < 0 : error |
1228 | * | |
1da177e4 LT |
1229 | * Call _DOD to enumerate all devices attached to display adapter |
1230 | * | |
4be44fcd | 1231 | */ |
1da177e4 LT |
1232 | |
1233 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1234 | { | |
4be44fcd LB |
1235 | int status; |
1236 | int count; | |
1237 | int i; | |
78eed028 | 1238 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1239 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1240 | union acpi_object *dod = NULL; | |
1241 | union acpi_object *obj; | |
1da177e4 | 1242 | |
90130268 | 1243 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1244 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1245 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1246 | return status; |
1da177e4 LT |
1247 | } |
1248 | ||
50dd0969 | 1249 | dod = buffer.pointer; |
1da177e4 | 1250 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1251 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1252 | status = -EFAULT; |
1253 | goto out; | |
1254 | } | |
1255 | ||
1256 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1257 | dod->package.count)); |
1da177e4 | 1258 | |
78eed028 DT |
1259 | active_list = kcalloc(1 + dod->package.count, |
1260 | sizeof(struct acpi_video_enumerated_device), | |
1261 | GFP_KERNEL); | |
1262 | if (!active_list) { | |
1da177e4 LT |
1263 | status = -ENOMEM; |
1264 | goto out; | |
1265 | } | |
1266 | ||
1267 | count = 0; | |
1268 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1269 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1270 | |
1271 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1272 | printk(KERN_ERR PREFIX |
1273 | "Invalid _DOD data in element %d\n", i); | |
1274 | continue; | |
1da177e4 | 1275 | } |
78eed028 DT |
1276 | |
1277 | active_list[count].value.int_val = obj->integer.value; | |
1278 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1279 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1280 | (int)obj->integer.value)); | |
1da177e4 LT |
1281 | count++; |
1282 | } | |
1da177e4 | 1283 | |
6044ec88 | 1284 | kfree(video->attached_array); |
4be44fcd | 1285 | |
78eed028 | 1286 | video->attached_array = active_list; |
1da177e4 | 1287 | video->attached_count = count; |
78eed028 | 1288 | |
915ea7e4 | 1289 | out: |
02438d87 | 1290 | kfree(buffer.pointer); |
d550d98d | 1291 | return status; |
1da177e4 LT |
1292 | } |
1293 | ||
4be44fcd LB |
1294 | static int |
1295 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1296 | u32 level_current, u32 event) | |
1da177e4 | 1297 | { |
63f0edfc | 1298 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1299 | max = max_below = 0; |
1300 | min = min_above = 255; | |
63f0edfc | 1301 | /* Find closest level to level_current */ |
0a3db1ce | 1302 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1303 | l = device->brightness->levels[i]; |
1304 | if (abs(l - level_current) < abs(delta)) { | |
1305 | delta = l - level_current; | |
1306 | if (!delta) | |
1307 | break; | |
1308 | } | |
1309 | } | |
1310 | /* Ajust level_current to closest available level */ | |
1311 | level_current += delta; | |
0a3db1ce | 1312 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1313 | l = device->brightness->levels[i]; |
1314 | if (l < min) | |
1315 | min = l; | |
1316 | if (l > max) | |
1317 | max = l; | |
1318 | if (l < min_above && l > level_current) | |
1319 | min_above = l; | |
1320 | if (l > max_below && l < level_current) | |
1321 | max_below = l; | |
1322 | } | |
1323 | ||
1324 | switch (event) { | |
1325 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1326 | return (level_current < max) ? min_above : min; | |
1327 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1328 | return (level_current < max) ? min_above : max; | |
1329 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1330 | return (level_current > min) ? max_below : min; | |
1331 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1332 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1333 | return 0; | |
1334 | default: | |
1335 | return level_current; | |
1336 | } | |
1da177e4 LT |
1337 | } |
1338 | ||
c8890f90 | 1339 | static int |
4be44fcd | 1340 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1341 | { |
27663c58 | 1342 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1343 | int result = -EINVAL; |
1344 | ||
fbc9fe1b AL |
1345 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1346 | if (!acpi_video_verify_backlight_support()) | |
28c32e99 ZR |
1347 | return 0; |
1348 | ||
469778c1 | 1349 | if (!device->brightness) |
c8890f90 ZR |
1350 | goto out; |
1351 | ||
1352 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1353 | &level_current, |
1354 | false); | |
c8890f90 ZR |
1355 | if (result) |
1356 | goto out; | |
1357 | ||
1da177e4 | 1358 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1359 | |
24450c7a | 1360 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1361 | |
36342742 MG |
1362 | if (!result) |
1363 | backlight_force_update(device->backlight, | |
1364 | BACKLIGHT_UPDATE_HOTKEY); | |
1365 | ||
c8890f90 ZR |
1366 | out: |
1367 | if (result) | |
1368 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1369 | ||
1370 | return result; | |
1da177e4 LT |
1371 | } |
1372 | ||
e92a7162 MG |
1373 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1374 | void **edid) | |
1375 | { | |
1376 | struct acpi_video_bus *video; | |
1377 | struct acpi_video_device *video_device; | |
1378 | union acpi_object *buffer = NULL; | |
1379 | acpi_status status; | |
1380 | int i, length; | |
1381 | ||
1382 | if (!device || !acpi_driver_data(device)) | |
1383 | return -EINVAL; | |
1384 | ||
1385 | video = acpi_driver_data(device); | |
1386 | ||
1387 | for (i = 0; i < video->attached_count; i++) { | |
1388 | video_device = video->attached_array[i].bind_info; | |
1389 | length = 256; | |
1390 | ||
1391 | if (!video_device) | |
1392 | continue; | |
1393 | ||
82069552 ZR |
1394 | if (!video_device->cap._DDC) |
1395 | continue; | |
1396 | ||
e92a7162 MG |
1397 | if (type) { |
1398 | switch (type) { | |
1399 | case ACPI_VIDEO_DISPLAY_CRT: | |
1400 | if (!video_device->flags.crt) | |
1401 | continue; | |
1402 | break; | |
1403 | case ACPI_VIDEO_DISPLAY_TV: | |
1404 | if (!video_device->flags.tvout) | |
1405 | continue; | |
1406 | break; | |
1407 | case ACPI_VIDEO_DISPLAY_DVI: | |
1408 | if (!video_device->flags.dvi) | |
1409 | continue; | |
1410 | break; | |
1411 | case ACPI_VIDEO_DISPLAY_LCD: | |
1412 | if (!video_device->flags.lcd) | |
1413 | continue; | |
1414 | break; | |
1415 | } | |
1416 | } else if (video_device->device_id != device_id) { | |
1417 | continue; | |
1418 | } | |
1419 | ||
1420 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1421 | ||
1422 | if (ACPI_FAILURE(status) || !buffer || | |
1423 | buffer->type != ACPI_TYPE_BUFFER) { | |
1424 | length = 128; | |
1425 | status = acpi_video_device_EDID(video_device, &buffer, | |
1426 | length); | |
1427 | if (ACPI_FAILURE(status) || !buffer || | |
1428 | buffer->type != ACPI_TYPE_BUFFER) { | |
1429 | continue; | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | *edid = buffer->buffer.pointer; | |
1434 | return length; | |
1435 | } | |
1436 | ||
1437 | return -ENODEV; | |
1438 | } | |
1439 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1440 | ||
1da177e4 | 1441 | static int |
4be44fcd LB |
1442 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1443 | struct acpi_device *device) | |
1da177e4 | 1444 | { |
fba4e087 | 1445 | int status = 0; |
ff102ea9 | 1446 | struct acpi_device *dev; |
1da177e4 | 1447 | |
fba4e087 IM |
1448 | /* |
1449 | * There are systems where video module known to work fine regardless | |
1450 | * of broken _DOD and ignoring returned value here doesn't cause | |
1451 | * any issues later. | |
1452 | */ | |
1453 | acpi_video_device_enumerate(video); | |
1da177e4 | 1454 | |
ff102ea9 | 1455 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1456 | |
1457 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1458 | if (status) { |
91e13aa3 AL |
1459 | dev_err(&dev->dev, "Can't attach device\n"); |
1460 | break; | |
1da177e4 | 1461 | } |
1da177e4 | 1462 | } |
d550d98d | 1463 | return status; |
1da177e4 LT |
1464 | } |
1465 | ||
1da177e4 LT |
1466 | /* acpi_video interface */ |
1467 | ||
efaa14c7 AL |
1468 | /* |
1469 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1470 | * preform any automatic brightness change on receiving a notification. | |
1471 | */ | |
4be44fcd | 1472 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1473 | { |
efaa14c7 | 1474 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1475 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1476 | } |
1477 | ||
4be44fcd | 1478 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1479 | { |
efaa14c7 | 1480 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1481 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1482 | } |
1483 | ||
7015558f | 1484 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1485 | { |
7015558f | 1486 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1487 | struct input_dev *input; |
17c452f9 | 1488 | int keycode = 0; |
e9dab196 | 1489 | |
67b662e1 | 1490 | if (!video || !video->input) |
d550d98d | 1491 | return; |
1da177e4 | 1492 | |
e9dab196 | 1493 | input = video->input; |
1da177e4 LT |
1494 | |
1495 | switch (event) { | |
98fb8fe1 | 1496 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1497 | * most likely via hotkey. */ |
8a37c65d | 1498 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1499 | break; |
1500 | ||
98fb8fe1 | 1501 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1502 | * connector. */ |
1503 | acpi_video_device_enumerate(video); | |
1504 | acpi_video_device_rebind(video); | |
e9dab196 | 1505 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1506 | break; |
1507 | ||
4be44fcd | 1508 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1509 | keycode = KEY_SWITCHVIDEOMODE; |
1510 | break; | |
4be44fcd | 1511 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1512 | keycode = KEY_VIDEO_NEXT; |
1513 | break; | |
4be44fcd | 1514 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1515 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1516 | break; |
1517 | ||
1518 | default: | |
1519 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1520 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1521 | break; |
1522 | } | |
1523 | ||
8a37c65d LT |
1524 | if (acpi_notifier_call_chain(device, event, 0)) |
1525 | /* Something vetoed the keypress. */ | |
1526 | keycode = 0; | |
17c452f9 MG |
1527 | |
1528 | if (keycode) { | |
1529 | input_report_key(input, keycode, 1); | |
1530 | input_sync(input); | |
1531 | input_report_key(input, keycode, 0); | |
1532 | input_sync(input); | |
1533 | } | |
e9dab196 | 1534 | |
d550d98d | 1535 | return; |
1da177e4 LT |
1536 | } |
1537 | ||
4be44fcd | 1538 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1539 | { |
50dd0969 | 1540 | struct acpi_video_device *video_device = data; |
4be44fcd | 1541 | struct acpi_device *device = NULL; |
e9dab196 LY |
1542 | struct acpi_video_bus *bus; |
1543 | struct input_dev *input; | |
17c452f9 | 1544 | int keycode = 0; |
1da177e4 | 1545 | |
1da177e4 | 1546 | if (!video_device) |
d550d98d | 1547 | return; |
1da177e4 | 1548 | |
e6afa0de | 1549 | device = video_device->dev; |
e9dab196 LY |
1550 | bus = video_device->video; |
1551 | input = bus->input; | |
1da177e4 LT |
1552 | |
1553 | switch (event) { | |
4be44fcd | 1554 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1555 | if (brightness_switch_enabled) |
1556 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1557 | keycode = KEY_BRIGHTNESS_CYCLE; |
1558 | break; | |
4be44fcd | 1559 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1560 | if (brightness_switch_enabled) |
1561 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1562 | keycode = KEY_BRIGHTNESSUP; |
1563 | break; | |
4be44fcd | 1564 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1565 | if (brightness_switch_enabled) |
1566 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1567 | keycode = KEY_BRIGHTNESSDOWN; |
1568 | break; | |
70f23fd6 | 1569 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1570 | if (brightness_switch_enabled) |
1571 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1572 | keycode = KEY_BRIGHTNESS_ZERO; |
1573 | break; | |
4be44fcd | 1574 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1575 | if (brightness_switch_enabled) |
1576 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 | 1577 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1578 | break; |
1579 | default: | |
1580 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1581 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1582 | break; |
1583 | } | |
e9dab196 | 1584 | |
7761f638 | 1585 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1586 | |
1587 | if (keycode) { | |
1588 | input_report_key(input, keycode, 1); | |
1589 | input_sync(input); | |
1590 | input_report_key(input, keycode, 0); | |
1591 | input_sync(input); | |
1592 | } | |
e9dab196 | 1593 | |
d550d98d | 1594 | return; |
1da177e4 LT |
1595 | } |
1596 | ||
ac7729da RW |
1597 | static int acpi_video_resume(struct notifier_block *nb, |
1598 | unsigned long val, void *ign) | |
863c1490 MG |
1599 | { |
1600 | struct acpi_video_bus *video; | |
1601 | struct acpi_video_device *video_device; | |
1602 | int i; | |
1603 | ||
ac7729da RW |
1604 | switch (val) { |
1605 | case PM_HIBERNATION_PREPARE: | |
1606 | case PM_SUSPEND_PREPARE: | |
1607 | case PM_RESTORE_PREPARE: | |
1608 | return NOTIFY_DONE; | |
1609 | } | |
863c1490 | 1610 | |
ac7729da RW |
1611 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1612 | ||
1613 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1614 | |
1615 | for (i = 0; i < video->attached_count; i++) { | |
1616 | video_device = video->attached_array[i].bind_info; | |
1617 | if (video_device && video_device->backlight) | |
1618 | acpi_video_set_brightness(video_device->backlight); | |
1619 | } | |
ac7729da RW |
1620 | |
1621 | return NOTIFY_OK; | |
863c1490 MG |
1622 | } |
1623 | ||
c504f8cb ZR |
1624 | static acpi_status |
1625 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1626 | void **return_value) | |
1627 | { | |
1628 | struct acpi_device *device = context; | |
1629 | struct acpi_device *sibling; | |
1630 | int result; | |
1631 | ||
1632 | if (handle == device->handle) | |
1633 | return AE_CTRL_TERMINATE; | |
1634 | ||
1635 | result = acpi_bus_get_device(handle, &sibling); | |
1636 | if (result) | |
1637 | return AE_OK; | |
1638 | ||
1639 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1640 | return AE_ALREADY_EXISTS; | |
1641 | ||
1642 | return AE_OK; | |
1643 | } | |
1644 | ||
67b662e1 AL |
1645 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1646 | { | |
fbc9fe1b | 1647 | if (acpi_video_verify_backlight_support()) { |
67b662e1 AL |
1648 | struct backlight_properties props; |
1649 | struct pci_dev *pdev; | |
1650 | acpi_handle acpi_parent; | |
1651 | struct device *parent = NULL; | |
1652 | int result; | |
1653 | static int count; | |
1654 | char *name; | |
1655 | ||
1656 | result = acpi_video_init_brightness(device); | |
1657 | if (result) | |
1658 | return; | |
1659 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1660 | if (!name) | |
1661 | return; | |
1662 | count++; | |
1663 | ||
1664 | acpi_get_parent(device->dev->handle, &acpi_parent); | |
1665 | ||
1666 | pdev = acpi_get_pci_dev(acpi_parent); | |
1667 | if (pdev) { | |
1668 | parent = &pdev->dev; | |
1669 | pci_dev_put(pdev); | |
1670 | } | |
1671 | ||
1672 | memset(&props, 0, sizeof(struct backlight_properties)); | |
1673 | props.type = BACKLIGHT_FIRMWARE; | |
1674 | props.max_brightness = device->brightness->count - 3; | |
1675 | device->backlight = backlight_device_register(name, | |
1676 | parent, | |
1677 | device, | |
1678 | &acpi_backlight_ops, | |
1679 | &props); | |
1680 | kfree(name); | |
1681 | if (IS_ERR(device->backlight)) | |
1682 | return; | |
1683 | ||
1684 | /* | |
1685 | * Save current brightness level in case we have to restore it | |
1686 | * before acpi_video_device_lcd_set_level() is called next time. | |
1687 | */ | |
1688 | device->backlight->props.brightness = | |
1689 | acpi_video_get_brightness(device->backlight); | |
1690 | ||
1691 | device->cooling_dev = thermal_cooling_device_register("LCD", | |
1692 | device->dev, &video_cooling_ops); | |
1693 | if (IS_ERR(device->cooling_dev)) { | |
1694 | /* | |
1695 | * Set cooling_dev to NULL so we don't crash trying to | |
1696 | * free it. | |
1697 | * Also, why the hell we are returning early and | |
1698 | * not attempt to register video output if cooling | |
1699 | * device registration failed? | |
1700 | * -- dtor | |
1701 | */ | |
1702 | device->cooling_dev = NULL; | |
1703 | return; | |
1704 | } | |
1705 | ||
1706 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1707 | device->cooling_dev->id); | |
1708 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1709 | &device->cooling_dev->device.kobj, | |
1710 | "thermal_cooling"); | |
1711 | if (result) | |
1712 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1713 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1714 | &device->dev->dev.kobj, "device"); | |
1715 | if (result) | |
1716 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) | |
1721 | { | |
1722 | struct acpi_video_device *dev; | |
1723 | ||
1724 | mutex_lock(&video->device_list_lock); | |
1725 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1726 | acpi_video_dev_register_backlight(dev); | |
1727 | mutex_unlock(&video->device_list_lock); | |
1728 | ||
1729 | video->pm_nb.notifier_call = acpi_video_resume; | |
1730 | video->pm_nb.priority = 0; | |
1731 | return register_pm_notifier(&video->pm_nb); | |
1732 | } | |
1733 | ||
1734 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1735 | { | |
1736 | if (device->backlight) { | |
1737 | backlight_device_unregister(device->backlight); | |
1738 | device->backlight = NULL; | |
1739 | } | |
1740 | if (device->brightness) { | |
1741 | kfree(device->brightness->levels); | |
1742 | kfree(device->brightness); | |
1743 | device->brightness = NULL; | |
1744 | } | |
1745 | if (device->cooling_dev) { | |
1746 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1747 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1748 | thermal_cooling_device_unregister(device->cooling_dev); | |
1749 | device->cooling_dev = NULL; | |
1750 | } | |
1751 | } | |
1752 | ||
1753 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1754 | { | |
1755 | struct acpi_video_device *dev; | |
1756 | int error = unregister_pm_notifier(&video->pm_nb); | |
1757 | ||
1758 | mutex_lock(&video->device_list_lock); | |
1759 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1760 | acpi_video_dev_unregister_backlight(dev); | |
1761 | mutex_unlock(&video->device_list_lock); | |
1762 | ||
1763 | return error; | |
1764 | } | |
1765 | ||
1766 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1767 | { | |
1768 | acpi_status status; | |
1769 | struct acpi_device *adev = device->dev; | |
1770 | ||
1771 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1772 | acpi_video_device_notify, device); | |
1773 | if (ACPI_FAILURE(status)) | |
1774 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1775 | else | |
1776 | device->flags.notify = 1; | |
1777 | } | |
1778 | ||
1779 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1780 | { | |
1781 | struct input_dev *input; | |
1782 | struct acpi_video_device *dev; | |
1783 | int error; | |
1784 | ||
1785 | video->input = input = input_allocate_device(); | |
1786 | if (!input) { | |
1787 | error = -ENOMEM; | |
1788 | goto out; | |
1789 | } | |
1790 | ||
1791 | error = acpi_video_bus_start_devices(video); | |
1792 | if (error) | |
1793 | goto err_free_input; | |
1794 | ||
1795 | snprintf(video->phys, sizeof(video->phys), | |
1796 | "%s/video/input0", acpi_device_hid(video->device)); | |
1797 | ||
1798 | input->name = acpi_device_name(video->device); | |
1799 | input->phys = video->phys; | |
1800 | input->id.bustype = BUS_HOST; | |
1801 | input->id.product = 0x06; | |
1802 | input->dev.parent = &video->device->dev; | |
1803 | input->evbit[0] = BIT(EV_KEY); | |
1804 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1805 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1806 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1807 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1808 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1809 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1810 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1811 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1812 | ||
1813 | error = input_register_device(input); | |
1814 | if (error) | |
1815 | goto err_stop_dev; | |
1816 | ||
1817 | mutex_lock(&video->device_list_lock); | |
1818 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1819 | acpi_video_dev_add_notify_handler(dev); | |
1820 | mutex_unlock(&video->device_list_lock); | |
1821 | ||
1822 | return 0; | |
1823 | ||
1824 | err_stop_dev: | |
1825 | acpi_video_bus_stop_devices(video); | |
1826 | err_free_input: | |
1827 | input_free_device(input); | |
1828 | video->input = NULL; | |
1829 | out: | |
1830 | return error; | |
1831 | } | |
1832 | ||
1833 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1834 | { | |
1835 | if (dev->flags.notify) { | |
1836 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1837 | acpi_video_device_notify); | |
1838 | dev->flags.notify = 0; | |
1839 | } | |
1840 | } | |
1841 | ||
1842 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1843 | { | |
1844 | struct acpi_video_device *dev; | |
1845 | ||
1846 | mutex_lock(&video->device_list_lock); | |
1847 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1848 | acpi_video_dev_remove_notify_handler(dev); | |
1849 | mutex_unlock(&video->device_list_lock); | |
1850 | ||
1851 | acpi_video_bus_stop_devices(video); | |
1852 | input_unregister_device(video->input); | |
1853 | video->input = NULL; | |
1854 | } | |
1855 | ||
1856 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1857 | { | |
1858 | struct acpi_video_device *dev, *next; | |
1859 | ||
1860 | mutex_lock(&video->device_list_lock); | |
1861 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1862 | list_del(&dev->entry); | |
1863 | kfree(dev); | |
1864 | } | |
1865 | mutex_unlock(&video->device_list_lock); | |
1866 | ||
1867 | return 0; | |
1868 | } | |
1869 | ||
ac7729da RW |
1870 | static int instance; |
1871 | ||
4be44fcd | 1872 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1873 | { |
f51e8391 | 1874 | struct acpi_video_bus *video; |
f51e8391 | 1875 | int error; |
c504f8cb ZR |
1876 | acpi_status status; |
1877 | ||
1878 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1879 | device->parent->handle, 1, | |
1880 | acpi_video_bus_match, NULL, | |
1881 | device, NULL); | |
1882 | if (status == AE_ALREADY_EXISTS) { | |
1883 | printk(KERN_WARNING FW_BUG | |
1884 | "Duplicate ACPI video bus devices for the" | |
1885 | " same VGA controller, please try module " | |
1886 | "parameter \"video.allow_duplicates=1\"" | |
1887 | "if the current driver doesn't work.\n"); | |
1888 | if (!allow_duplicates) | |
1889 | return -ENODEV; | |
1890 | } | |
1da177e4 | 1891 | |
36bcbec7 | 1892 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1893 | if (!video) |
d550d98d | 1894 | return -ENOMEM; |
1da177e4 | 1895 | |
e6d9da1d ZR |
1896 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1897 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1898 | if (instance) | |
1899 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1900 | instance++; |
e6d9da1d | 1901 | } |
f3b39f13 ZY |
1902 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1903 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1904 | if (instance) | |
1905 | device->pnp.bus_id[3] = '0' + instance; | |
1906 | instance++; | |
1907 | } | |
e6d9da1d | 1908 | |
e6afa0de | 1909 | video->device = device; |
1da177e4 LT |
1910 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1911 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1912 | device->driver_data = video; |
1da177e4 LT |
1913 | |
1914 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1915 | error = acpi_video_bus_check(video); |
1916 | if (error) | |
1917 | goto err_free_video; | |
1da177e4 | 1918 | |
bbac81f5 | 1919 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1920 | INIT_LIST_HEAD(&video->video_device_list); |
1921 | ||
ea9f8856 IM |
1922 | error = acpi_video_bus_get_devices(video, device); |
1923 | if (error) | |
91e13aa3 | 1924 | goto err_put_video; |
1da177e4 | 1925 | |
1da177e4 | 1926 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1927 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1928 | video->flags.multihead ? "yes" : "no", | |
1929 | video->flags.rom ? "yes" : "no", | |
1930 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1931 | mutex_lock(&video_list_lock); |
1932 | list_add_tail(&video->entry, &video_bus_head); | |
1933 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1934 | |
67b662e1 AL |
1935 | acpi_video_bus_register_backlight(video); |
1936 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1937 | |
f51e8391 DT |
1938 | return 0; |
1939 | ||
67b662e1 | 1940 | err_put_video: |
f51e8391 DT |
1941 | acpi_video_bus_put_devices(video); |
1942 | kfree(video->attached_array); | |
67b662e1 | 1943 | err_free_video: |
f51e8391 | 1944 | kfree(video); |
db89b4f0 | 1945 | device->driver_data = NULL; |
1da177e4 | 1946 | |
f51e8391 | 1947 | return error; |
1da177e4 LT |
1948 | } |
1949 | ||
51fac838 | 1950 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1951 | { |
4be44fcd | 1952 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1953 | |
1da177e4 LT |
1954 | |
1955 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1956 | return -EINVAL; |
1da177e4 | 1957 | |
50dd0969 | 1958 | video = acpi_driver_data(device); |
1da177e4 | 1959 | |
67b662e1 AL |
1960 | acpi_video_bus_remove_notify_handler(video); |
1961 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1962 | acpi_video_bus_put_devices(video); |
1da177e4 | 1963 | |
67b662e1 AL |
1964 | mutex_lock(&video_list_lock); |
1965 | list_del(&video->entry); | |
1966 | mutex_unlock(&video_list_lock); | |
1967 | ||
6044ec88 | 1968 | kfree(video->attached_array); |
1da177e4 LT |
1969 | kfree(video); |
1970 | ||
d550d98d | 1971 | return 0; |
1da177e4 LT |
1972 | } |
1973 | ||
c6996bdd AC |
1974 | static int __init is_i740(struct pci_dev *dev) |
1975 | { | |
1976 | if (dev->device == 0x00D1) | |
1977 | return 1; | |
1978 | if (dev->device == 0x7000) | |
1979 | return 1; | |
1980 | return 0; | |
1981 | } | |
1982 | ||
74a365b3 MG |
1983 | static int __init intel_opregion_present(void) |
1984 | { | |
c6996bdd | 1985 | int opregion = 0; |
74a365b3 MG |
1986 | struct pci_dev *dev = NULL; |
1987 | u32 address; | |
1988 | ||
1989 | for_each_pci_dev(dev) { | |
1990 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1991 | continue; | |
1992 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1993 | continue; | |
c6996bdd AC |
1994 | /* We don't want to poke around undefined i740 registers */ |
1995 | if (is_i740(dev)) | |
1996 | continue; | |
74a365b3 MG |
1997 | pci_read_config_dword(dev, 0xfc, &address); |
1998 | if (!address) | |
1999 | continue; | |
c6996bdd | 2000 | opregion = 1; |
74a365b3 | 2001 | } |
c6996bdd | 2002 | return opregion; |
74a365b3 MG |
2003 | } |
2004 | ||
8e5c2b77 | 2005 | int acpi_video_register(void) |
1da177e4 | 2006 | { |
8e5c2b77 | 2007 | int result = 0; |
86e437f0 ZY |
2008 | if (register_count) { |
2009 | /* | |
8e5c2b77 RW |
2010 | * if the function of acpi_video_register is already called, |
2011 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
2012 | */ |
2013 | return 0; | |
2014 | } | |
1da177e4 | 2015 | |
67b662e1 AL |
2016 | mutex_init(&video_list_lock); |
2017 | INIT_LIST_HEAD(&video_bus_head); | |
2018 | ||
1da177e4 | 2019 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 2020 | if (result < 0) |
d550d98d | 2021 | return -ENODEV; |
1da177e4 | 2022 | |
86e437f0 ZY |
2023 | /* |
2024 | * When the acpi_video_bus is loaded successfully, increase | |
2025 | * the counter reference. | |
2026 | */ | |
2027 | register_count = 1; | |
2028 | ||
d550d98d | 2029 | return 0; |
1da177e4 | 2030 | } |
8e5c2b77 | 2031 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2032 | |
86e437f0 ZY |
2033 | void acpi_video_unregister(void) |
2034 | { | |
2035 | if (!register_count) { | |
2036 | /* | |
2037 | * If the acpi video bus is already unloaded, don't | |
2038 | * unload it again and return directly. | |
2039 | */ | |
2040 | return; | |
2041 | } | |
2042 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2043 | ||
86e437f0 ZY |
2044 | register_count = 0; |
2045 | ||
2046 | return; | |
2047 | } | |
2048 | EXPORT_SYMBOL(acpi_video_unregister); | |
2049 | ||
74a365b3 MG |
2050 | /* |
2051 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2052 | * the video opregion code to be run first in order to initialise | |
2053 | * state before any ACPI video calls are made. To handle this we defer | |
2054 | * registration of the video class until the opregion code has run. | |
2055 | */ | |
2056 | ||
2057 | static int __init acpi_video_init(void) | |
2058 | { | |
45cb50e6 ZR |
2059 | dmi_check_system(video_dmi_table); |
2060 | ||
74a365b3 MG |
2061 | if (intel_opregion_present()) |
2062 | return 0; | |
2063 | ||
2064 | return acpi_video_register(); | |
2065 | } | |
1da177e4 | 2066 | |
86e437f0 | 2067 | static void __exit acpi_video_exit(void) |
1da177e4 | 2068 | { |
86e437f0 | 2069 | acpi_video_unregister(); |
1da177e4 | 2070 | |
d550d98d | 2071 | return; |
1da177e4 LT |
2072 | } |
2073 | ||
2074 | module_init(acpi_video_init); | |
2075 | module_exit(acpi_video_exit); |