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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 | ||
886129a8 | 71 | static bool brightness_switch_enabled; |
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 | */ |
0e9f81d3 AL |
85 | static int use_native_backlight_param = -1; |
86 | module_param_named(use_native_backlight, use_native_backlight_param, int, 0444); | |
87 | static bool use_native_backlight_dmi = false; | |
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; |
4be44fcd | 154 | u8 dos_setting; |
1da177e4 | 155 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
156 | u8 attached_count; |
157 | struct acpi_video_bus_cap cap; | |
1da177e4 | 158 | struct acpi_video_bus_flags flags; |
4be44fcd | 159 | struct list_head video_device_list; |
bbac81f5 | 160 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 161 | struct list_head entry; |
e9dab196 LY |
162 | struct input_dev *input; |
163 | char phys[32]; /* for input device */ | |
ac7729da | 164 | struct notifier_block pm_nb; |
1da177e4 LT |
165 | }; |
166 | ||
167 | struct acpi_video_device_flags { | |
4be44fcd LB |
168 | u8 crt:1; |
169 | u8 lcd:1; | |
170 | u8 tvout:1; | |
82cae999 | 171 | u8 dvi:1; |
4be44fcd LB |
172 | u8 bios:1; |
173 | u8 unknown:1; | |
91e13aa3 AL |
174 | u8 notify:1; |
175 | u8 reserved:1; | |
1da177e4 LT |
176 | }; |
177 | ||
178 | struct acpi_video_device_cap { | |
21fcb34e FC |
179 | u8 _ADR:1; /* Return the unique ID */ |
180 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
181 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 182 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 183 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 184 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
185 | }; |
186 | ||
d32f6947 ZR |
187 | struct acpi_video_brightness_flags { |
188 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 189 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 190 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
191 | }; |
192 | ||
1da177e4 | 193 | struct acpi_video_device_brightness { |
4be44fcd LB |
194 | int curr; |
195 | int count; | |
196 | int *levels; | |
d32f6947 | 197 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
198 | }; |
199 | ||
200 | struct acpi_video_device { | |
4be44fcd LB |
201 | unsigned long device_id; |
202 | struct acpi_video_device_flags flags; | |
203 | struct acpi_video_device_cap cap; | |
204 | struct list_head entry; | |
205 | struct acpi_video_bus *video; | |
206 | struct acpi_device *dev; | |
1da177e4 | 207 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 208 | struct backlight_device *backlight; |
4a703a8f | 209 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
210 | }; |
211 | ||
b7171ae7 | 212 | static const char device_decode[][30] = { |
1da177e4 LT |
213 | "motherboard VGA device", |
214 | "PCI VGA device", | |
215 | "AGP VGA device", | |
216 | "UNKNOWN", | |
217 | }; | |
218 | ||
4be44fcd LB |
219 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
220 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
221 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
222 | struct acpi_video_device *device); | |
1da177e4 | 223 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
224 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
225 | int level); | |
226 | static int acpi_video_device_lcd_get_level_current( | |
227 | struct acpi_video_device *device, | |
a89803df | 228 | unsigned long long *level, bool raw); |
4be44fcd LB |
229 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
230 | u32 level_current, u32 event); | |
c8890f90 | 231 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 232 | int event); |
1da177e4 | 233 | |
0e9f81d3 AL |
234 | static bool acpi_video_use_native_backlight(void) |
235 | { | |
236 | if (use_native_backlight_param != -1) | |
237 | return use_native_backlight_param; | |
238 | else | |
239 | return use_native_backlight_dmi; | |
240 | } | |
241 | ||
fbc9fe1b AL |
242 | static bool acpi_video_verify_backlight_support(void) |
243 | { | |
0e9f81d3 | 244 | if (acpi_osi_is_win8() && acpi_video_use_native_backlight() && |
fbc9fe1b AL |
245 | backlight_device_registered(BACKLIGHT_RAW)) |
246 | return false; | |
247 | return acpi_video_backlight_support(); | |
248 | } | |
249 | ||
21fcb34e | 250 | /* backlight device sysfs support */ |
2f3d000a YL |
251 | static int acpi_video_get_brightness(struct backlight_device *bd) |
252 | { | |
27663c58 | 253 | unsigned long long cur_level; |
38531e6f | 254 | int i; |
7c364e79 | 255 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 256 | |
a89803df | 257 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 258 | return -EINVAL; |
38531e6f MG |
259 | for (i = 2; i < vd->brightness->count; i++) { |
260 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
261 | /* |
262 | * The first two entries are special - see page 575 | |
263 | * of the ACPI spec 3.0 | |
264 | */ | |
915ea7e4 | 265 | return i - 2; |
38531e6f MG |
266 | } |
267 | return 0; | |
2f3d000a YL |
268 | } |
269 | ||
270 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
271 | { | |
24450c7a | 272 | int request_level = bd->props.brightness + 2; |
7c364e79 | 273 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a ZR |
274 | |
275 | return acpi_video_device_lcd_set_level(vd, | |
276 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
277 | } |
278 | ||
acc2472e | 279 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
280 | .get_brightness = acpi_video_get_brightness, |
281 | .update_status = acpi_video_set_brightness, | |
282 | }; | |
283 | ||
702ed512 | 284 | /* thermal cooling device callbacks */ |
4a703a8f | 285 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 286 | long *state) |
702ed512 | 287 | { |
4a703a8f | 288 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
289 | struct acpi_video_device *video = acpi_driver_data(device); |
290 | ||
6503e5df MG |
291 | *state = video->brightness->count - 3; |
292 | return 0; | |
702ed512 ZR |
293 | } |
294 | ||
4a703a8f | 295 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 296 | long *state) |
702ed512 | 297 | { |
4a703a8f | 298 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 299 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 300 | unsigned long long level; |
6503e5df | 301 | int offset; |
702ed512 | 302 | |
a89803df | 303 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 304 | return -EINVAL; |
6503e5df MG |
305 | for (offset = 2; offset < video->brightness->count; offset++) |
306 | if (level == video->brightness->levels[offset]) { | |
307 | *state = video->brightness->count - offset - 1; | |
308 | return 0; | |
309 | } | |
702ed512 ZR |
310 | |
311 | return -EINVAL; | |
312 | } | |
313 | ||
314 | static int | |
4a703a8f | 315 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 316 | { |
4a703a8f | 317 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
318 | struct acpi_video_device *video = acpi_driver_data(device); |
319 | int level; | |
320 | ||
915ea7e4 | 321 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
322 | return -EINVAL; |
323 | ||
324 | state = video->brightness->count - state; | |
915ea7e4 | 325 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
326 | return acpi_video_device_lcd_set_level(video, level); |
327 | } | |
328 | ||
9c8b04be | 329 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
330 | .get_max_state = video_get_max_state, |
331 | .get_cur_state = video_get_cur_state, | |
332 | .set_cur_state = video_set_cur_state, | |
333 | }; | |
334 | ||
21fcb34e FC |
335 | /* |
336 | * -------------------------------------------------------------------------- | |
337 | * Video Management | |
338 | * -------------------------------------------------------------------------- | |
339 | */ | |
1da177e4 | 340 | |
1da177e4 | 341 | static int |
4be44fcd LB |
342 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
343 | union acpi_object **levels) | |
1da177e4 | 344 | { |
4be44fcd LB |
345 | int status; |
346 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
347 | union acpi_object *obj; | |
1da177e4 | 348 | |
1da177e4 LT |
349 | |
350 | *levels = NULL; | |
351 | ||
90130268 | 352 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 353 | if (!ACPI_SUCCESS(status)) |
d550d98d | 354 | return status; |
4be44fcd | 355 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 356 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 357 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
358 | status = -EFAULT; |
359 | goto err; | |
360 | } | |
361 | ||
362 | *levels = obj; | |
363 | ||
d550d98d | 364 | return 0; |
1da177e4 | 365 | |
915ea7e4 | 366 | err: |
6044ec88 | 367 | kfree(buffer.pointer); |
1da177e4 | 368 | |
d550d98d | 369 | return status; |
1da177e4 LT |
370 | } |
371 | ||
372 | static int | |
4be44fcd | 373 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 374 | { |
24450c7a | 375 | int status; |
9e6dada9 | 376 | int state; |
1da177e4 | 377 | |
0db98202 JL |
378 | status = acpi_execute_simple_method(device->dev->handle, |
379 | "_BCM", level); | |
24450c7a ZR |
380 | if (ACPI_FAILURE(status)) { |
381 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
382 | return -EIO; | |
383 | } | |
384 | ||
4500ca8e | 385 | device->brightness->curr = level; |
9e6dada9 | 386 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 387 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
388 | if (device->backlight) |
389 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
390 | return 0; |
391 | } | |
9e6dada9 | 392 | |
24450c7a ZR |
393 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
394 | return -EINVAL; | |
1da177e4 LT |
395 | } |
396 | ||
45cb50e6 ZR |
397 | /* |
398 | * For some buggy _BQC methods, we need to add a constant value to | |
399 | * the _BQC return value to get the actual current brightness level | |
400 | */ | |
401 | ||
402 | static int bqc_offset_aml_bug_workaround; | |
403 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
404 | { | |
405 | bqc_offset_aml_bug_workaround = 9; | |
406 | return 0; | |
407 | } | |
408 | ||
0e9f81d3 AL |
409 | static int __init video_set_use_native_backlight(const struct dmi_system_id *d) |
410 | { | |
411 | use_native_backlight_dmi = true; | |
412 | return 0; | |
413 | } | |
414 | ||
45cb50e6 ZR |
415 | static struct dmi_system_id video_dmi_table[] __initdata = { |
416 | /* | |
417 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
418 | */ | |
419 | { | |
420 | .callback = video_set_bqc_offset, | |
421 | .ident = "Acer Aspire 5720", | |
422 | .matches = { | |
423 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
424 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
425 | }, | |
426 | }, | |
5afc4abe LB |
427 | { |
428 | .callback = video_set_bqc_offset, | |
429 | .ident = "Acer Aspire 5710Z", | |
430 | .matches = { | |
431 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
432 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
433 | }, | |
434 | }, | |
34ac272b ZR |
435 | { |
436 | .callback = video_set_bqc_offset, | |
437 | .ident = "eMachines E510", | |
438 | .matches = { | |
439 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
440 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
441 | }, | |
442 | }, | |
93bcece2 ZR |
443 | { |
444 | .callback = video_set_bqc_offset, | |
445 | .ident = "Acer Aspire 5315", | |
446 | .matches = { | |
447 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
448 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
449 | }, | |
450 | }, | |
152a4e63 ZR |
451 | { |
452 | .callback = video_set_bqc_offset, | |
453 | .ident = "Acer Aspire 7720", | |
454 | .matches = { | |
455 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
456 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
457 | }, | |
458 | }, | |
0e9f81d3 AL |
459 | { |
460 | .callback = video_set_use_native_backlight, | |
43d94902 | 461 | .ident = "ThinkPad T430 and T430s", |
0e9f81d3 AL |
462 | .matches = { |
463 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
43d94902 | 464 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430"), |
0e9f81d3 AL |
465 | }, |
466 | }, | |
467 | { | |
468 | .callback = video_set_use_native_backlight, | |
469 | .ident = "ThinkPad X230", | |
470 | .matches = { | |
471 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
472 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"), | |
473 | }, | |
474 | }, | |
43d94902 HG |
475 | { |
476 | .callback = video_set_use_native_backlight, | |
0e9f81d3 AL |
477 | .ident = "ThinkPad X1 Carbon", |
478 | .matches = { | |
479 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
480 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"), | |
481 | }, | |
482 | }, | |
483 | { | |
484 | .callback = video_set_use_native_backlight, | |
485 | .ident = "Lenovo Yoga 13", | |
486 | .matches = { | |
487 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
488 | DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"), | |
489 | }, | |
490 | }, | |
997dd7fe SCP |
491 | { |
492 | .callback = video_set_use_native_backlight, | |
493 | .ident = "Thinkpad Helix", | |
494 | .matches = { | |
495 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
496 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"), | |
497 | }, | |
498 | }, | |
0e9f81d3 AL |
499 | { |
500 | .callback = video_set_use_native_backlight, | |
501 | .ident = "Dell Inspiron 7520", | |
502 | .matches = { | |
503 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
5ff365fb | 504 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"), |
0e9f81d3 AL |
505 | }, |
506 | }, | |
507 | { | |
508 | .callback = video_set_use_native_backlight, | |
509 | .ident = "Acer Aspire 5733Z", | |
510 | .matches = { | |
511 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
512 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5733Z"), | |
513 | }, | |
514 | }, | |
43d94902 HG |
515 | { |
516 | .callback = video_set_use_native_backlight, | |
517 | .ident = "Acer Aspire 5742G", | |
518 | .matches = { | |
519 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
520 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5742G"), | |
521 | }, | |
522 | }, | |
0e9f81d3 AL |
523 | { |
524 | .callback = video_set_use_native_backlight, | |
525 | .ident = "Acer Aspire V5-431", | |
526 | .matches = { | |
527 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
528 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-431"), | |
529 | }, | |
530 | }, | |
531 | { | |
532 | .callback = video_set_use_native_backlight, | |
533 | .ident = "HP ProBook 4340s", | |
534 | .matches = { | |
535 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
536 | DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4340s"), | |
537 | }, | |
538 | }, | |
539 | { | |
540 | .callback = video_set_use_native_backlight, | |
541 | .ident = "HP ProBook 2013 models", | |
542 | .matches = { | |
543 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
544 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook "), | |
545 | DMI_MATCH(DMI_PRODUCT_NAME, " G1"), | |
546 | }, | |
547 | }, | |
548 | { | |
549 | .callback = video_set_use_native_backlight, | |
550 | .ident = "HP EliteBook 2013 models", | |
551 | .matches = { | |
552 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
553 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "), | |
554 | DMI_MATCH(DMI_PRODUCT_NAME, " G1"), | |
555 | }, | |
556 | }, | |
557 | { | |
558 | .callback = video_set_use_native_backlight, | |
559 | .ident = "HP ZBook 14", | |
560 | .matches = { | |
561 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
562 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 14"), | |
563 | }, | |
564 | }, | |
565 | { | |
566 | .callback = video_set_use_native_backlight, | |
567 | .ident = "HP ZBook 15", | |
568 | .matches = { | |
569 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
570 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 15"), | |
571 | }, | |
572 | }, | |
573 | { | |
574 | .callback = video_set_use_native_backlight, | |
575 | .ident = "HP ZBook 17", | |
576 | .matches = { | |
577 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
578 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 17"), | |
579 | }, | |
580 | }, | |
581 | { | |
582 | .callback = video_set_use_native_backlight, | |
583 | .ident = "HP EliteBook 8780w", | |
584 | .matches = { | |
585 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
586 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"), | |
587 | }, | |
588 | }, | |
45cb50e6 ZR |
589 | {} |
590 | }; | |
591 | ||
994fa63c DB |
592 | static unsigned long long |
593 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
594 | unsigned long long bqc_value) | |
595 | { | |
596 | unsigned long long level; | |
597 | ||
598 | if (device->brightness->flags._BQC_use_index) { | |
599 | /* | |
600 | * _BQC returns an index that doesn't account for | |
601 | * the first 2 items with special meaning, so we need | |
602 | * to compensate for that by offsetting ourselves | |
603 | */ | |
604 | if (device->brightness->flags._BCL_reversed) | |
605 | bqc_value = device->brightness->count - 3 - bqc_value; | |
606 | ||
607 | level = device->brightness->levels[bqc_value + 2]; | |
608 | } else { | |
609 | level = bqc_value; | |
610 | } | |
611 | ||
612 | level += bqc_offset_aml_bug_workaround; | |
613 | ||
614 | return level; | |
615 | } | |
616 | ||
1da177e4 | 617 | static int |
4be44fcd | 618 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 619 | unsigned long long *level, bool raw) |
1da177e4 | 620 | { |
c8890f90 | 621 | acpi_status status = AE_OK; |
4e231fa4 | 622 | int i; |
c8890f90 | 623 | |
c60d638e ZR |
624 | if (device->cap._BQC || device->cap._BCQ) { |
625 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
626 | ||
627 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
628 | NULL, level); |
629 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
630 | if (raw) { |
631 | /* | |
632 | * Caller has indicated he wants the raw | |
633 | * value returned by _BQC, so don't furtherly | |
634 | * mess with the value. | |
635 | */ | |
636 | return 0; | |
637 | } | |
638 | ||
994fa63c | 639 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 640 | |
4e231fa4 VS |
641 | for (i = 2; i < device->brightness->count; i++) |
642 | if (device->brightness->levels[i] == *level) { | |
643 | device->brightness->curr = *level; | |
644 | return 0; | |
915ea7e4 | 645 | } |
a89803df DB |
646 | /* |
647 | * BQC returned an invalid level. | |
648 | * Stop using it. | |
649 | */ | |
650 | ACPI_WARNING((AE_INFO, | |
651 | "%s returned an invalid level", | |
652 | buf)); | |
653 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 654 | } else { |
21fcb34e FC |
655 | /* |
656 | * Fixme: | |
c8890f90 ZR |
657 | * should we return an error or ignore this failure? |
658 | * dev->brightness->curr is a cached value which stores | |
659 | * the correct current backlight level in most cases. | |
660 | * ACPI video backlight still works w/ buggy _BQC. | |
661 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
662 | */ | |
c60d638e ZR |
663 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
664 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
665 | } |
666 | } | |
667 | ||
4500ca8e | 668 | *level = device->brightness->curr; |
c8890f90 | 669 | return 0; |
1da177e4 LT |
670 | } |
671 | ||
672 | static int | |
4be44fcd LB |
673 | acpi_video_device_EDID(struct acpi_video_device *device, |
674 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 675 | { |
4be44fcd LB |
676 | int status; |
677 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
678 | union acpi_object *obj; | |
679 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
680 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 681 | |
1da177e4 LT |
682 | |
683 | *edid = NULL; | |
684 | ||
685 | if (!device) | |
d550d98d | 686 | return -ENODEV; |
1da177e4 LT |
687 | if (length == 128) |
688 | arg0.integer.value = 1; | |
689 | else if (length == 256) | |
690 | arg0.integer.value = 2; | |
691 | else | |
d550d98d | 692 | return -EINVAL; |
1da177e4 | 693 | |
90130268 | 694 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 695 | if (ACPI_FAILURE(status)) |
d550d98d | 696 | return -ENODEV; |
1da177e4 | 697 | |
50dd0969 | 698 | obj = buffer.pointer; |
1da177e4 LT |
699 | |
700 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
701 | *edid = obj; | |
702 | else { | |
6468463a | 703 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
704 | status = -EFAULT; |
705 | kfree(obj); | |
706 | } | |
707 | ||
d550d98d | 708 | return status; |
1da177e4 LT |
709 | } |
710 | ||
1da177e4 LT |
711 | /* bus */ |
712 | ||
1da177e4 LT |
713 | /* |
714 | * Arg: | |
21fcb34e FC |
715 | * video : video bus device pointer |
716 | * bios_flag : | |
1da177e4 LT |
717 | * 0. The system BIOS should NOT automatically switch(toggle) |
718 | * the active display output. | |
719 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 720 | * active display output. No switch event. |
1da177e4 LT |
721 | * 2. The _DGS value should be locked. |
722 | * 3. The system BIOS should not automatically switch (toggle) the | |
723 | * active display output, but instead generate the display switch | |
724 | * event notify code. | |
725 | * lcd_flag : | |
726 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 727 | * of the LCD when the power changes from AC to DC |
21fcb34e | 728 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 729 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 730 | * Return Value: |
ea9f8856 | 731 | * -EINVAL wrong arg. |
1da177e4 LT |
732 | */ |
733 | ||
734 | static int | |
4be44fcd | 735 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 736 | { |
ea9f8856 | 737 | acpi_status status; |
1da177e4 | 738 | |
b0373843 ZR |
739 | if (!video->cap._DOS) |
740 | return 0; | |
1da177e4 | 741 | |
ea9f8856 IM |
742 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
743 | return -EINVAL; | |
0db98202 JL |
744 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
745 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
746 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
747 | if (ACPI_FAILURE(status)) |
748 | return -EIO; | |
1da177e4 | 749 | |
ea9f8856 | 750 | return 0; |
1da177e4 LT |
751 | } |
752 | ||
935e5f29 ZR |
753 | /* |
754 | * Simple comparison function used to sort backlight levels. | |
755 | */ | |
756 | ||
757 | static int | |
758 | acpi_video_cmp_level(const void *a, const void *b) | |
759 | { | |
760 | return *(int *)a - *(int *)b; | |
761 | } | |
762 | ||
a50188da AL |
763 | /* |
764 | * Decides if _BQC/_BCQ for this system is usable | |
765 | * | |
766 | * We do this by changing the level first and then read out the current | |
767 | * brightness level, if the value does not match, find out if it is using | |
768 | * index. If not, clear the _BQC/_BCQ capability. | |
769 | */ | |
770 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
771 | int max_level, int current_level) | |
772 | { | |
773 | struct acpi_video_device_brightness *br = device->brightness; | |
774 | int result; | |
775 | unsigned long long level; | |
776 | int test_level; | |
777 | ||
778 | /* don't mess with existing known broken systems */ | |
779 | if (bqc_offset_aml_bug_workaround) | |
780 | return 0; | |
781 | ||
782 | /* | |
783 | * Some systems always report current brightness level as maximum | |
784 | * through _BQC, we need to test another value for them. | |
785 | */ | |
b3b301c5 | 786 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
787 | |
788 | result = acpi_video_device_lcd_set_level(device, test_level); | |
789 | if (result) | |
790 | return result; | |
791 | ||
792 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
793 | if (result) | |
794 | return result; | |
795 | ||
796 | if (level != test_level) { | |
797 | /* buggy _BQC found, need to find out if it uses index */ | |
798 | if (level < br->count) { | |
799 | if (br->flags._BCL_reversed) | |
800 | level = br->count - 3 - level; | |
801 | if (br->levels[level + 2] == test_level) | |
802 | br->flags._BQC_use_index = 1; | |
803 | } | |
804 | ||
805 | if (!br->flags._BQC_use_index) | |
806 | device->cap._BQC = device->cap._BCQ = 0; | |
807 | } | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | ||
1da177e4 | 813 | /* |
21fcb34e FC |
814 | * Arg: |
815 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
816 | * |
817 | * Return Value: | |
469778c1 JJ |
818 | * Maximum brightness level |
819 | * | |
820 | * Allocate and initialize device->brightness. | |
821 | */ | |
822 | ||
823 | static int | |
824 | acpi_video_init_brightness(struct acpi_video_device *device) | |
825 | { | |
826 | union acpi_object *obj = NULL; | |
d32f6947 | 827 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 828 | unsigned long long level, level_old; |
469778c1 JJ |
829 | union acpi_object *o; |
830 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 831 | int result = -EINVAL; |
bd8ba205 | 832 | u32 value; |
469778c1 JJ |
833 | |
834 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
835 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
836 | "LCD brightness level\n")); | |
837 | goto out; | |
838 | } | |
839 | ||
840 | if (obj->package.count < 2) | |
841 | goto out; | |
842 | ||
843 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
844 | if (!br) { | |
845 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 846 | result = -ENOMEM; |
469778c1 JJ |
847 | goto out; |
848 | } | |
849 | ||
d32f6947 | 850 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 851 | GFP_KERNEL); |
1a7c618a ZR |
852 | if (!br->levels) { |
853 | result = -ENOMEM; | |
469778c1 | 854 | goto out_free; |
1a7c618a | 855 | } |
469778c1 JJ |
856 | |
857 | for (i = 0; i < obj->package.count; i++) { | |
858 | o = (union acpi_object *)&obj->package.elements[i]; | |
859 | if (o->type != ACPI_TYPE_INTEGER) { | |
860 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
861 | continue; | |
862 | } | |
bd8ba205 HG |
863 | value = (u32) o->integer.value; |
864 | /* Skip duplicate entries */ | |
865 | if (count > 2 && br->levels[count - 1] == value) | |
866 | continue; | |
867 | ||
868 | br->levels[count] = value; | |
469778c1 JJ |
869 | |
870 | if (br->levels[count] > max_level) | |
871 | max_level = br->levels[count]; | |
872 | count++; | |
873 | } | |
874 | ||
d32f6947 ZR |
875 | /* |
876 | * some buggy BIOS don't export the levels | |
877 | * when machine is on AC/Battery in _BCL package. | |
878 | * In this case, the first two elements in _BCL packages | |
879 | * are also supported brightness levels that OS should take care of. | |
880 | */ | |
90af2cf6 ZR |
881 | for (i = 2; i < count; i++) { |
882 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 883 | level_ac_battery++; |
90af2cf6 ZR |
884 | if (br->levels[i] == br->levels[1]) |
885 | level_ac_battery++; | |
886 | } | |
d32f6947 ZR |
887 | |
888 | if (level_ac_battery < 2) { | |
889 | level_ac_battery = 2 - level_ac_battery; | |
890 | br->flags._BCL_no_ac_battery_levels = 1; | |
891 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
892 | br->levels[i] = br->levels[i - level_ac_battery]; | |
893 | count += level_ac_battery; | |
894 | } else if (level_ac_battery > 2) | |
bf6787eb | 895 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 896 | |
d80fb99f ZR |
897 | /* Check if the _BCL package is in a reversed order */ |
898 | if (max_level == br->levels[2]) { | |
899 | br->flags._BCL_reversed = 1; | |
900 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
901 | acpi_video_cmp_level, NULL); | |
902 | } else if (max_level != br->levels[count - 1]) | |
903 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 904 | "Found unordered _BCL package")); |
469778c1 JJ |
905 | |
906 | br->count = count; | |
907 | device->brightness = br; | |
1a7c618a | 908 | |
1a7c618a | 909 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 910 | br->curr = level = max_level; |
e047cca6 ZR |
911 | |
912 | if (!device->cap._BQC) | |
913 | goto set_level; | |
914 | ||
a89803df DB |
915 | result = acpi_video_device_lcd_get_level_current(device, |
916 | &level_old, true); | |
1a7c618a ZR |
917 | if (result) |
918 | goto out_free_levels; | |
919 | ||
a50188da | 920 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
921 | if (result) |
922 | goto out_free_levels; | |
a50188da AL |
923 | /* |
924 | * cap._BQC may get cleared due to _BQC is found to be broken | |
925 | * in acpi_video_bqc_quirk, so check again here. | |
926 | */ | |
927 | if (!device->cap._BQC) | |
928 | goto set_level; | |
e047cca6 | 929 | |
545ef368 AL |
930 | level = acpi_video_bqc_value_to_level(device, level_old); |
931 | /* | |
932 | * On some buggy laptops, _BQC returns an uninitialized | |
933 | * value when invoked for the first time, i.e. | |
934 | * level_old is invalid (no matter whether it's a level | |
935 | * or an index). Set the backlight to max_level in this case. | |
936 | */ | |
937 | for (i = 2; i < br->count; i++) | |
938 | if (level == br->levels[i]) | |
939 | break; | |
940 | if (i == br->count || !level) | |
941 | level = max_level; | |
e047cca6 | 942 | |
e047cca6 | 943 | set_level: |
90c53ca4 | 944 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
945 | if (result) |
946 | goto out_free_levels; | |
1a7c618a | 947 | |
d32f6947 ZR |
948 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
949 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 950 | kfree(obj); |
1a7c618a | 951 | return result; |
469778c1 JJ |
952 | |
953 | out_free_levels: | |
954 | kfree(br->levels); | |
955 | out_free: | |
956 | kfree(br); | |
957 | out: | |
958 | device->brightness = NULL; | |
959 | kfree(obj); | |
1a7c618a | 960 | return result; |
469778c1 JJ |
961 | } |
962 | ||
963 | /* | |
964 | * Arg: | |
965 | * device : video output device (LCD, CRT, ..) | |
966 | * | |
967 | * Return Value: | |
21fcb34e | 968 | * None |
1da177e4 | 969 | * |
98fb8fe1 | 970 | * Find out all required AML methods defined under the output |
1da177e4 LT |
971 | * device. |
972 | */ | |
973 | ||
4be44fcd | 974 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 975 | { |
952c63e9 | 976 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 977 | device->cap._ADR = 1; |
952c63e9 | 978 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 979 | device->cap._BCL = 1; |
952c63e9 | 980 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 981 | device->cap._BCM = 1; |
952c63e9 | 982 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 983 | device->cap._BQC = 1; |
952c63e9 | 984 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
985 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
986 | device->cap._BCQ = 1; | |
987 | } | |
988 | ||
952c63e9 | 989 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 990 | device->cap._DDC = 1; |
1da177e4 LT |
991 | } |
992 | ||
993 | /* | |
21fcb34e FC |
994 | * Arg: |
995 | * device : video output device (VGA) | |
1da177e4 LT |
996 | * |
997 | * Return Value: | |
21fcb34e | 998 | * None |
1da177e4 | 999 | * |
98fb8fe1 | 1000 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
1001 | */ |
1002 | ||
4be44fcd | 1003 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1004 | { |
952c63e9 | 1005 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 1006 | video->cap._DOS = 1; |
952c63e9 | 1007 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 1008 | video->cap._DOD = 1; |
952c63e9 | 1009 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 1010 | video->cap._ROM = 1; |
952c63e9 | 1011 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 1012 | video->cap._GPD = 1; |
952c63e9 | 1013 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 1014 | video->cap._SPD = 1; |
952c63e9 | 1015 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 1016 | video->cap._VPO = 1; |
1da177e4 LT |
1017 | } |
1018 | ||
1019 | /* | |
1020 | * Check whether the video bus device has required AML method to | |
1021 | * support the desired features | |
1022 | */ | |
1023 | ||
4be44fcd | 1024 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1025 | { |
4be44fcd | 1026 | acpi_status status = -ENOENT; |
1e4cffe7 | 1027 | struct pci_dev *dev; |
1da177e4 LT |
1028 | |
1029 | if (!video) | |
d550d98d | 1030 | return -EINVAL; |
1da177e4 | 1031 | |
1e4cffe7 | 1032 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1033 | if (!dev) |
1034 | return -ENODEV; | |
1e4cffe7 | 1035 | pci_dev_put(dev); |
22c13f9d | 1036 | |
21fcb34e FC |
1037 | /* |
1038 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1039 | * to check well known required nodes. |
1040 | */ | |
1041 | ||
98fb8fe1 | 1042 | /* Does this device support video switching? */ |
3a1151e3 SB |
1043 | if (video->cap._DOS || video->cap._DOD) { |
1044 | if (!video->cap._DOS) { | |
1045 | printk(KERN_WARNING FW_BUG | |
1046 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1047 | acpi_device_bid(video->device)); | |
1048 | } | |
1da177e4 LT |
1049 | video->flags.multihead = 1; |
1050 | status = 0; | |
1051 | } | |
1052 | ||
98fb8fe1 | 1053 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1054 | if (video->cap._ROM) { |
1da177e4 LT |
1055 | video->flags.rom = 1; |
1056 | status = 0; | |
1057 | } | |
1058 | ||
98fb8fe1 | 1059 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1060 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1061 | video->flags.post = 1; |
1062 | status = 0; | |
1063 | } | |
1064 | ||
d550d98d | 1065 | return status; |
1da177e4 LT |
1066 | } |
1067 | ||
21fcb34e FC |
1068 | /* |
1069 | * -------------------------------------------------------------------------- | |
1070 | * Driver Interface | |
1071 | * -------------------------------------------------------------------------- | |
1072 | */ | |
1da177e4 LT |
1073 | |
1074 | /* device interface */ | |
915ea7e4 | 1075 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1076 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1077 | { | |
78eed028 DT |
1078 | struct acpi_video_enumerated_device *ids; |
1079 | int i; | |
1080 | ||
1081 | for (i = 0; i < video->attached_count; i++) { | |
1082 | ids = &video->attached_array[i]; | |
1083 | if ((ids->value.int_val & 0xffff) == device_id) | |
1084 | return &ids->value.attrib; | |
1085 | } | |
82cae999 | 1086 | |
82cae999 RZ |
1087 | return NULL; |
1088 | } | |
1da177e4 | 1089 | |
e92a7162 MG |
1090 | static int |
1091 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1092 | unsigned long device_id) | |
1093 | { | |
1094 | struct acpi_video_enumerated_device *ids; | |
1095 | int i; | |
1096 | ||
1097 | for (i = 0; i < video->attached_count; i++) { | |
1098 | ids = &video->attached_array[i]; | |
1099 | if ((ids->value.int_val & 0xffff) == device_id) | |
1100 | return ids->value.int_val; | |
1101 | } | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
1da177e4 | 1106 | static int |
4be44fcd LB |
1107 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1108 | struct acpi_video_bus *video) | |
1da177e4 | 1109 | { |
27663c58 | 1110 | unsigned long long device_id; |
e92a7162 | 1111 | int status, device_type; |
4be44fcd | 1112 | struct acpi_video_device *data; |
915ea7e4 | 1113 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1114 | |
4be44fcd LB |
1115 | status = |
1116 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1117 | /* Some device omits _ADR, we skip them instead of fail */ |
1118 | if (ACPI_FAILURE(status)) | |
1119 | return 0; | |
1da177e4 | 1120 | |
91e13aa3 AL |
1121 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1122 | if (!data) | |
1123 | return -ENOMEM; | |
82cae999 | 1124 | |
91e13aa3 AL |
1125 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1126 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1127 | device->driver_data = data; | |
1128 | ||
1129 | data->device_id = device_id; | |
1130 | data->video = video; | |
1131 | data->dev = device; | |
1132 | ||
1133 | attribute = acpi_video_get_device_attr(video, device_id); | |
1134 | ||
915ea7e4 | 1135 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1136 | switch (attribute->display_type) { |
1137 | case ACPI_VIDEO_DISPLAY_CRT: | |
1138 | data->flags.crt = 1; | |
1139 | break; | |
1140 | case ACPI_VIDEO_DISPLAY_TV: | |
1141 | data->flags.tvout = 1; | |
1142 | break; | |
1143 | case ACPI_VIDEO_DISPLAY_DVI: | |
1144 | data->flags.dvi = 1; | |
1145 | break; | |
1146 | case ACPI_VIDEO_DISPLAY_LCD: | |
1147 | data->flags.lcd = 1; | |
1148 | break; | |
1149 | default: | |
1150 | data->flags.unknown = 1; | |
1151 | break; | |
1152 | } | |
915ea7e4 | 1153 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1154 | data->flags.bios = 1; |
1155 | } else { | |
1156 | /* Check for legacy IDs */ | |
1157 | device_type = acpi_video_get_device_type(video, device_id); | |
1158 | /* Ignore bits 16 and 18-20 */ | |
1159 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1160 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1161 | data->flags.crt = 1; | |
1162 | break; | |
1163 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1164 | data->flags.lcd = 1; | |
1165 | break; | |
1166 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1167 | data->flags.tvout = 1; | |
1168 | break; | |
1169 | default: | |
1170 | data->flags.unknown = 1; | |
e92a7162 | 1171 | } |
91e13aa3 | 1172 | } |
4be44fcd | 1173 | |
91e13aa3 AL |
1174 | acpi_video_device_bind(video, data); |
1175 | acpi_video_device_find_cap(data); | |
1da177e4 | 1176 | |
91e13aa3 AL |
1177 | mutex_lock(&video->device_list_lock); |
1178 | list_add_tail(&data->entry, &video->video_device_list); | |
1179 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1180 | |
91e13aa3 | 1181 | return status; |
1da177e4 LT |
1182 | } |
1183 | ||
1184 | /* | |
1185 | * Arg: | |
21fcb34e | 1186 | * video : video bus device |
1da177e4 LT |
1187 | * |
1188 | * Return: | |
21fcb34e FC |
1189 | * none |
1190 | * | |
1191 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1192 | * bind the ids with the corresponding video devices |
1193 | * under the video bus. | |
4be44fcd | 1194 | */ |
1da177e4 | 1195 | |
4be44fcd | 1196 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1197 | { |
ff102ea9 DT |
1198 | struct acpi_video_device *dev; |
1199 | ||
bbac81f5 | 1200 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1201 | |
1202 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1203 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1204 | |
bbac81f5 | 1205 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1206 | } |
1207 | ||
1208 | /* | |
1209 | * Arg: | |
21fcb34e FC |
1210 | * video : video bus device |
1211 | * device : video output device under the video | |
1212 | * bus | |
1da177e4 LT |
1213 | * |
1214 | * Return: | |
21fcb34e FC |
1215 | * none |
1216 | * | |
1da177e4 LT |
1217 | * Bind the ids with the corresponding video devices |
1218 | * under the video bus. | |
4be44fcd | 1219 | */ |
1da177e4 LT |
1220 | |
1221 | static void | |
4be44fcd LB |
1222 | acpi_video_device_bind(struct acpi_video_bus *video, |
1223 | struct acpi_video_device *device) | |
1da177e4 | 1224 | { |
78eed028 | 1225 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1226 | int i; |
1da177e4 | 1227 | |
78eed028 DT |
1228 | for (i = 0; i < video->attached_count; i++) { |
1229 | ids = &video->attached_array[i]; | |
1230 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1231 | ids->bind_info = device; | |
1da177e4 LT |
1232 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1233 | } | |
1234 | } | |
1da177e4 LT |
1235 | } |
1236 | ||
1237 | /* | |
1238 | * Arg: | |
21fcb34e | 1239 | * video : video bus device |
1da177e4 LT |
1240 | * |
1241 | * Return: | |
21fcb34e FC |
1242 | * < 0 : error |
1243 | * | |
1da177e4 LT |
1244 | * Call _DOD to enumerate all devices attached to display adapter |
1245 | * | |
4be44fcd | 1246 | */ |
1da177e4 LT |
1247 | |
1248 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1249 | { | |
4be44fcd LB |
1250 | int status; |
1251 | int count; | |
1252 | int i; | |
78eed028 | 1253 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1254 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1255 | union acpi_object *dod = NULL; | |
1256 | union acpi_object *obj; | |
1da177e4 | 1257 | |
90130268 | 1258 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1259 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1260 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1261 | return status; |
1da177e4 LT |
1262 | } |
1263 | ||
50dd0969 | 1264 | dod = buffer.pointer; |
1da177e4 | 1265 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1266 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1267 | status = -EFAULT; |
1268 | goto out; | |
1269 | } | |
1270 | ||
1271 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1272 | dod->package.count)); |
1da177e4 | 1273 | |
78eed028 DT |
1274 | active_list = kcalloc(1 + dod->package.count, |
1275 | sizeof(struct acpi_video_enumerated_device), | |
1276 | GFP_KERNEL); | |
1277 | if (!active_list) { | |
1da177e4 LT |
1278 | status = -ENOMEM; |
1279 | goto out; | |
1280 | } | |
1281 | ||
1282 | count = 0; | |
1283 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1284 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1285 | |
1286 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1287 | printk(KERN_ERR PREFIX |
1288 | "Invalid _DOD data in element %d\n", i); | |
1289 | continue; | |
1da177e4 | 1290 | } |
78eed028 DT |
1291 | |
1292 | active_list[count].value.int_val = obj->integer.value; | |
1293 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1294 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1295 | (int)obj->integer.value)); | |
1da177e4 LT |
1296 | count++; |
1297 | } | |
1da177e4 | 1298 | |
6044ec88 | 1299 | kfree(video->attached_array); |
4be44fcd | 1300 | |
78eed028 | 1301 | video->attached_array = active_list; |
1da177e4 | 1302 | video->attached_count = count; |
78eed028 | 1303 | |
915ea7e4 | 1304 | out: |
02438d87 | 1305 | kfree(buffer.pointer); |
d550d98d | 1306 | return status; |
1da177e4 LT |
1307 | } |
1308 | ||
4be44fcd LB |
1309 | static int |
1310 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1311 | u32 level_current, u32 event) | |
1da177e4 | 1312 | { |
63f0edfc | 1313 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1314 | max = max_below = 0; |
1315 | min = min_above = 255; | |
63f0edfc | 1316 | /* Find closest level to level_current */ |
0a3db1ce | 1317 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1318 | l = device->brightness->levels[i]; |
1319 | if (abs(l - level_current) < abs(delta)) { | |
1320 | delta = l - level_current; | |
1321 | if (!delta) | |
1322 | break; | |
1323 | } | |
1324 | } | |
1325 | /* Ajust level_current to closest available level */ | |
1326 | level_current += delta; | |
0a3db1ce | 1327 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1328 | l = device->brightness->levels[i]; |
1329 | if (l < min) | |
1330 | min = l; | |
1331 | if (l > max) | |
1332 | max = l; | |
1333 | if (l < min_above && l > level_current) | |
1334 | min_above = l; | |
1335 | if (l > max_below && l < level_current) | |
1336 | max_below = l; | |
1337 | } | |
1338 | ||
1339 | switch (event) { | |
1340 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1341 | return (level_current < max) ? min_above : min; | |
1342 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1343 | return (level_current < max) ? min_above : max; | |
1344 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1345 | return (level_current > min) ? max_below : min; | |
1346 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1347 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1348 | return 0; | |
1349 | default: | |
1350 | return level_current; | |
1351 | } | |
1da177e4 LT |
1352 | } |
1353 | ||
c8890f90 | 1354 | static int |
4be44fcd | 1355 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1356 | { |
27663c58 | 1357 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1358 | int result = -EINVAL; |
1359 | ||
fbc9fe1b AL |
1360 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1361 | if (!acpi_video_verify_backlight_support()) | |
28c32e99 ZR |
1362 | return 0; |
1363 | ||
469778c1 | 1364 | if (!device->brightness) |
c8890f90 ZR |
1365 | goto out; |
1366 | ||
1367 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1368 | &level_current, |
1369 | false); | |
c8890f90 ZR |
1370 | if (result) |
1371 | goto out; | |
1372 | ||
1da177e4 | 1373 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1374 | |
24450c7a | 1375 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1376 | |
36342742 MG |
1377 | if (!result) |
1378 | backlight_force_update(device->backlight, | |
1379 | BACKLIGHT_UPDATE_HOTKEY); | |
1380 | ||
c8890f90 ZR |
1381 | out: |
1382 | if (result) | |
1383 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1384 | ||
1385 | return result; | |
1da177e4 LT |
1386 | } |
1387 | ||
e92a7162 MG |
1388 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1389 | void **edid) | |
1390 | { | |
1391 | struct acpi_video_bus *video; | |
1392 | struct acpi_video_device *video_device; | |
1393 | union acpi_object *buffer = NULL; | |
1394 | acpi_status status; | |
1395 | int i, length; | |
1396 | ||
1397 | if (!device || !acpi_driver_data(device)) | |
1398 | return -EINVAL; | |
1399 | ||
1400 | video = acpi_driver_data(device); | |
1401 | ||
1402 | for (i = 0; i < video->attached_count; i++) { | |
1403 | video_device = video->attached_array[i].bind_info; | |
1404 | length = 256; | |
1405 | ||
1406 | if (!video_device) | |
1407 | continue; | |
1408 | ||
82069552 ZR |
1409 | if (!video_device->cap._DDC) |
1410 | continue; | |
1411 | ||
e92a7162 MG |
1412 | if (type) { |
1413 | switch (type) { | |
1414 | case ACPI_VIDEO_DISPLAY_CRT: | |
1415 | if (!video_device->flags.crt) | |
1416 | continue; | |
1417 | break; | |
1418 | case ACPI_VIDEO_DISPLAY_TV: | |
1419 | if (!video_device->flags.tvout) | |
1420 | continue; | |
1421 | break; | |
1422 | case ACPI_VIDEO_DISPLAY_DVI: | |
1423 | if (!video_device->flags.dvi) | |
1424 | continue; | |
1425 | break; | |
1426 | case ACPI_VIDEO_DISPLAY_LCD: | |
1427 | if (!video_device->flags.lcd) | |
1428 | continue; | |
1429 | break; | |
1430 | } | |
1431 | } else if (video_device->device_id != device_id) { | |
1432 | continue; | |
1433 | } | |
1434 | ||
1435 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1436 | ||
1437 | if (ACPI_FAILURE(status) || !buffer || | |
1438 | buffer->type != ACPI_TYPE_BUFFER) { | |
1439 | length = 128; | |
1440 | status = acpi_video_device_EDID(video_device, &buffer, | |
1441 | length); | |
1442 | if (ACPI_FAILURE(status) || !buffer || | |
1443 | buffer->type != ACPI_TYPE_BUFFER) { | |
1444 | continue; | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | *edid = buffer->buffer.pointer; | |
1449 | return length; | |
1450 | } | |
1451 | ||
1452 | return -ENODEV; | |
1453 | } | |
1454 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1455 | ||
1da177e4 | 1456 | static int |
4be44fcd LB |
1457 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1458 | struct acpi_device *device) | |
1da177e4 | 1459 | { |
fba4e087 | 1460 | int status = 0; |
ff102ea9 | 1461 | struct acpi_device *dev; |
1da177e4 | 1462 | |
fba4e087 IM |
1463 | /* |
1464 | * There are systems where video module known to work fine regardless | |
1465 | * of broken _DOD and ignoring returned value here doesn't cause | |
1466 | * any issues later. | |
1467 | */ | |
1468 | acpi_video_device_enumerate(video); | |
1da177e4 | 1469 | |
ff102ea9 | 1470 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1471 | |
1472 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1473 | if (status) { |
91e13aa3 AL |
1474 | dev_err(&dev->dev, "Can't attach device\n"); |
1475 | break; | |
1da177e4 | 1476 | } |
1da177e4 | 1477 | } |
d550d98d | 1478 | return status; |
1da177e4 LT |
1479 | } |
1480 | ||
1da177e4 LT |
1481 | /* acpi_video interface */ |
1482 | ||
efaa14c7 AL |
1483 | /* |
1484 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1485 | * preform any automatic brightness change on receiving a notification. | |
1486 | */ | |
4be44fcd | 1487 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1488 | { |
efaa14c7 | 1489 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1490 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1491 | } |
1492 | ||
4be44fcd | 1493 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1494 | { |
efaa14c7 | 1495 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1496 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1497 | } |
1498 | ||
7015558f | 1499 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1500 | { |
7015558f | 1501 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1502 | struct input_dev *input; |
17c452f9 | 1503 | int keycode = 0; |
e9dab196 | 1504 | |
67b662e1 | 1505 | if (!video || !video->input) |
d550d98d | 1506 | return; |
1da177e4 | 1507 | |
e9dab196 | 1508 | input = video->input; |
1da177e4 LT |
1509 | |
1510 | switch (event) { | |
98fb8fe1 | 1511 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1512 | * most likely via hotkey. */ |
8a37c65d | 1513 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1514 | break; |
1515 | ||
98fb8fe1 | 1516 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1517 | * connector. */ |
1518 | acpi_video_device_enumerate(video); | |
1519 | acpi_video_device_rebind(video); | |
e9dab196 | 1520 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1521 | break; |
1522 | ||
4be44fcd | 1523 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1524 | keycode = KEY_SWITCHVIDEOMODE; |
1525 | break; | |
4be44fcd | 1526 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1527 | keycode = KEY_VIDEO_NEXT; |
1528 | break; | |
4be44fcd | 1529 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1530 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1531 | break; |
1532 | ||
1533 | default: | |
1534 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1535 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1536 | break; |
1537 | } | |
1538 | ||
8a37c65d LT |
1539 | if (acpi_notifier_call_chain(device, event, 0)) |
1540 | /* Something vetoed the keypress. */ | |
1541 | keycode = 0; | |
17c452f9 MG |
1542 | |
1543 | if (keycode) { | |
1544 | input_report_key(input, keycode, 1); | |
1545 | input_sync(input); | |
1546 | input_report_key(input, keycode, 0); | |
1547 | input_sync(input); | |
1548 | } | |
e9dab196 | 1549 | |
d550d98d | 1550 | return; |
1da177e4 LT |
1551 | } |
1552 | ||
4be44fcd | 1553 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1554 | { |
50dd0969 | 1555 | struct acpi_video_device *video_device = data; |
4be44fcd | 1556 | struct acpi_device *device = NULL; |
e9dab196 LY |
1557 | struct acpi_video_bus *bus; |
1558 | struct input_dev *input; | |
17c452f9 | 1559 | int keycode = 0; |
1da177e4 | 1560 | |
1da177e4 | 1561 | if (!video_device) |
d550d98d | 1562 | return; |
1da177e4 | 1563 | |
e6afa0de | 1564 | device = video_device->dev; |
e9dab196 LY |
1565 | bus = video_device->video; |
1566 | input = bus->input; | |
1da177e4 LT |
1567 | |
1568 | switch (event) { | |
4be44fcd | 1569 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1570 | if (brightness_switch_enabled) |
1571 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1572 | keycode = KEY_BRIGHTNESS_CYCLE; |
1573 | break; | |
4be44fcd | 1574 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1575 | if (brightness_switch_enabled) |
1576 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1577 | keycode = KEY_BRIGHTNESSUP; |
1578 | break; | |
4be44fcd | 1579 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1580 | if (brightness_switch_enabled) |
1581 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1582 | keycode = KEY_BRIGHTNESSDOWN; |
1583 | break; | |
70f23fd6 | 1584 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1585 | if (brightness_switch_enabled) |
1586 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1587 | keycode = KEY_BRIGHTNESS_ZERO; |
1588 | break; | |
4be44fcd | 1589 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1590 | if (brightness_switch_enabled) |
1591 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 | 1592 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1593 | break; |
1594 | default: | |
1595 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1596 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1597 | break; |
1598 | } | |
e9dab196 | 1599 | |
7761f638 | 1600 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1601 | |
1602 | if (keycode) { | |
1603 | input_report_key(input, keycode, 1); | |
1604 | input_sync(input); | |
1605 | input_report_key(input, keycode, 0); | |
1606 | input_sync(input); | |
1607 | } | |
e9dab196 | 1608 | |
d550d98d | 1609 | return; |
1da177e4 LT |
1610 | } |
1611 | ||
ac7729da RW |
1612 | static int acpi_video_resume(struct notifier_block *nb, |
1613 | unsigned long val, void *ign) | |
863c1490 MG |
1614 | { |
1615 | struct acpi_video_bus *video; | |
1616 | struct acpi_video_device *video_device; | |
1617 | int i; | |
1618 | ||
ac7729da RW |
1619 | switch (val) { |
1620 | case PM_HIBERNATION_PREPARE: | |
1621 | case PM_SUSPEND_PREPARE: | |
1622 | case PM_RESTORE_PREPARE: | |
1623 | return NOTIFY_DONE; | |
1624 | } | |
863c1490 | 1625 | |
ac7729da RW |
1626 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1627 | ||
1628 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1629 | |
1630 | for (i = 0; i < video->attached_count; i++) { | |
1631 | video_device = video->attached_array[i].bind_info; | |
1632 | if (video_device && video_device->backlight) | |
1633 | acpi_video_set_brightness(video_device->backlight); | |
1634 | } | |
ac7729da RW |
1635 | |
1636 | return NOTIFY_OK; | |
863c1490 MG |
1637 | } |
1638 | ||
c504f8cb ZR |
1639 | static acpi_status |
1640 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1641 | void **return_value) | |
1642 | { | |
1643 | struct acpi_device *device = context; | |
1644 | struct acpi_device *sibling; | |
1645 | int result; | |
1646 | ||
1647 | if (handle == device->handle) | |
1648 | return AE_CTRL_TERMINATE; | |
1649 | ||
1650 | result = acpi_bus_get_device(handle, &sibling); | |
1651 | if (result) | |
1652 | return AE_OK; | |
1653 | ||
1654 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1655 | return AE_ALREADY_EXISTS; | |
1656 | ||
1657 | return AE_OK; | |
1658 | } | |
1659 | ||
67b662e1 AL |
1660 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1661 | { | |
99678ed7 HG |
1662 | struct backlight_properties props; |
1663 | struct pci_dev *pdev; | |
1664 | acpi_handle acpi_parent; | |
1665 | struct device *parent = NULL; | |
1666 | int result; | |
1667 | static int count; | |
1668 | char *name; | |
67b662e1 | 1669 | |
99678ed7 HG |
1670 | result = acpi_video_init_brightness(device); |
1671 | if (result) | |
1672 | return; | |
1673 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1674 | if (!name) | |
1675 | return; | |
1676 | count++; | |
67b662e1 | 1677 | |
99678ed7 | 1678 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1679 | |
99678ed7 HG |
1680 | pdev = acpi_get_pci_dev(acpi_parent); |
1681 | if (pdev) { | |
1682 | parent = &pdev->dev; | |
1683 | pci_dev_put(pdev); | |
1684 | } | |
67b662e1 | 1685 | |
99678ed7 HG |
1686 | memset(&props, 0, sizeof(struct backlight_properties)); |
1687 | props.type = BACKLIGHT_FIRMWARE; | |
1688 | props.max_brightness = device->brightness->count - 3; | |
1689 | device->backlight = backlight_device_register(name, | |
1690 | parent, | |
1691 | device, | |
1692 | &acpi_backlight_ops, | |
1693 | &props); | |
1694 | kfree(name); | |
1695 | if (IS_ERR(device->backlight)) | |
1696 | return; | |
67b662e1 | 1697 | |
99678ed7 HG |
1698 | /* |
1699 | * Save current brightness level in case we have to restore it | |
1700 | * before acpi_video_device_lcd_set_level() is called next time. | |
1701 | */ | |
1702 | device->backlight->props.brightness = | |
1703 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1704 | |
99678ed7 HG |
1705 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1706 | device->dev, &video_cooling_ops); | |
1707 | if (IS_ERR(device->cooling_dev)) { | |
1708 | /* | |
1709 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1710 | * Also, why the hell we are returning early and not attempt to | |
1711 | * register video output if cooling device registration failed? | |
1712 | * -- dtor | |
1713 | */ | |
1714 | device->cooling_dev = NULL; | |
1715 | return; | |
67b662e1 | 1716 | } |
99678ed7 HG |
1717 | |
1718 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1719 | device->cooling_dev->id); | |
1720 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1721 | &device->cooling_dev->device.kobj, | |
1722 | "thermal_cooling"); | |
1723 | if (result) | |
1724 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1725 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1726 | &device->dev->dev.kobj, "device"); | |
1727 | if (result) | |
1728 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1729 | } |
1730 | ||
1731 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) | |
1732 | { | |
1733 | struct acpi_video_device *dev; | |
1734 | ||
99678ed7 HG |
1735 | if (!acpi_video_verify_backlight_support()) |
1736 | return 0; | |
1737 | ||
67b662e1 AL |
1738 | mutex_lock(&video->device_list_lock); |
1739 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1740 | acpi_video_dev_register_backlight(dev); | |
1741 | mutex_unlock(&video->device_list_lock); | |
1742 | ||
99678ed7 HG |
1743 | video->backlight_registered = true; |
1744 | ||
67b662e1 AL |
1745 | video->pm_nb.notifier_call = acpi_video_resume; |
1746 | video->pm_nb.priority = 0; | |
1747 | return register_pm_notifier(&video->pm_nb); | |
1748 | } | |
1749 | ||
1750 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1751 | { | |
1752 | if (device->backlight) { | |
1753 | backlight_device_unregister(device->backlight); | |
1754 | device->backlight = NULL; | |
1755 | } | |
1756 | if (device->brightness) { | |
1757 | kfree(device->brightness->levels); | |
1758 | kfree(device->brightness); | |
1759 | device->brightness = NULL; | |
1760 | } | |
1761 | if (device->cooling_dev) { | |
1762 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1763 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1764 | thermal_cooling_device_unregister(device->cooling_dev); | |
1765 | device->cooling_dev = NULL; | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1770 | { | |
1771 | struct acpi_video_device *dev; | |
99678ed7 HG |
1772 | int error; |
1773 | ||
1774 | if (!video->backlight_registered) | |
1775 | return 0; | |
1776 | ||
1777 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1778 | |
1779 | mutex_lock(&video->device_list_lock); | |
1780 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1781 | acpi_video_dev_unregister_backlight(dev); | |
1782 | mutex_unlock(&video->device_list_lock); | |
1783 | ||
99678ed7 HG |
1784 | video->backlight_registered = false; |
1785 | ||
67b662e1 AL |
1786 | return error; |
1787 | } | |
1788 | ||
1789 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1790 | { | |
1791 | acpi_status status; | |
1792 | struct acpi_device *adev = device->dev; | |
1793 | ||
1794 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1795 | acpi_video_device_notify, device); | |
1796 | if (ACPI_FAILURE(status)) | |
1797 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1798 | else | |
1799 | device->flags.notify = 1; | |
1800 | } | |
1801 | ||
1802 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1803 | { | |
1804 | struct input_dev *input; | |
1805 | struct acpi_video_device *dev; | |
1806 | int error; | |
1807 | ||
1808 | video->input = input = input_allocate_device(); | |
1809 | if (!input) { | |
1810 | error = -ENOMEM; | |
1811 | goto out; | |
1812 | } | |
1813 | ||
1814 | error = acpi_video_bus_start_devices(video); | |
1815 | if (error) | |
1816 | goto err_free_input; | |
1817 | ||
1818 | snprintf(video->phys, sizeof(video->phys), | |
1819 | "%s/video/input0", acpi_device_hid(video->device)); | |
1820 | ||
1821 | input->name = acpi_device_name(video->device); | |
1822 | input->phys = video->phys; | |
1823 | input->id.bustype = BUS_HOST; | |
1824 | input->id.product = 0x06; | |
1825 | input->dev.parent = &video->device->dev; | |
1826 | input->evbit[0] = BIT(EV_KEY); | |
1827 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1828 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1829 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1830 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1831 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1832 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1833 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1834 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1835 | ||
1836 | error = input_register_device(input); | |
1837 | if (error) | |
1838 | goto err_stop_dev; | |
1839 | ||
1840 | mutex_lock(&video->device_list_lock); | |
1841 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1842 | acpi_video_dev_add_notify_handler(dev); | |
1843 | mutex_unlock(&video->device_list_lock); | |
1844 | ||
1845 | return 0; | |
1846 | ||
1847 | err_stop_dev: | |
1848 | acpi_video_bus_stop_devices(video); | |
1849 | err_free_input: | |
1850 | input_free_device(input); | |
1851 | video->input = NULL; | |
1852 | out: | |
1853 | return error; | |
1854 | } | |
1855 | ||
1856 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1857 | { | |
1858 | if (dev->flags.notify) { | |
1859 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1860 | acpi_video_device_notify); | |
1861 | dev->flags.notify = 0; | |
1862 | } | |
1863 | } | |
1864 | ||
1865 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1866 | { | |
1867 | struct acpi_video_device *dev; | |
1868 | ||
1869 | mutex_lock(&video->device_list_lock); | |
1870 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1871 | acpi_video_dev_remove_notify_handler(dev); | |
1872 | mutex_unlock(&video->device_list_lock); | |
1873 | ||
1874 | acpi_video_bus_stop_devices(video); | |
1875 | input_unregister_device(video->input); | |
1876 | video->input = NULL; | |
1877 | } | |
1878 | ||
1879 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1880 | { | |
1881 | struct acpi_video_device *dev, *next; | |
1882 | ||
1883 | mutex_lock(&video->device_list_lock); | |
1884 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1885 | list_del(&dev->entry); | |
1886 | kfree(dev); | |
1887 | } | |
1888 | mutex_unlock(&video->device_list_lock); | |
1889 | ||
1890 | return 0; | |
1891 | } | |
1892 | ||
ac7729da RW |
1893 | static int instance; |
1894 | ||
4be44fcd | 1895 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1896 | { |
f51e8391 | 1897 | struct acpi_video_bus *video; |
f51e8391 | 1898 | int error; |
c504f8cb ZR |
1899 | acpi_status status; |
1900 | ||
1901 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1902 | device->parent->handle, 1, | |
1903 | acpi_video_bus_match, NULL, | |
1904 | device, NULL); | |
1905 | if (status == AE_ALREADY_EXISTS) { | |
1906 | printk(KERN_WARNING FW_BUG | |
1907 | "Duplicate ACPI video bus devices for the" | |
1908 | " same VGA controller, please try module " | |
1909 | "parameter \"video.allow_duplicates=1\"" | |
1910 | "if the current driver doesn't work.\n"); | |
1911 | if (!allow_duplicates) | |
1912 | return -ENODEV; | |
1913 | } | |
1da177e4 | 1914 | |
36bcbec7 | 1915 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1916 | if (!video) |
d550d98d | 1917 | return -ENOMEM; |
1da177e4 | 1918 | |
e6d9da1d ZR |
1919 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1920 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1921 | if (instance) | |
1922 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1923 | instance++; |
e6d9da1d | 1924 | } |
f3b39f13 ZY |
1925 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1926 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1927 | if (instance) | |
1928 | device->pnp.bus_id[3] = '0' + instance; | |
1929 | instance++; | |
1930 | } | |
e6d9da1d | 1931 | |
e6afa0de | 1932 | video->device = device; |
1da177e4 LT |
1933 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1934 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1935 | device->driver_data = video; |
1da177e4 LT |
1936 | |
1937 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1938 | error = acpi_video_bus_check(video); |
1939 | if (error) | |
1940 | goto err_free_video; | |
1da177e4 | 1941 | |
bbac81f5 | 1942 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1943 | INIT_LIST_HEAD(&video->video_device_list); |
1944 | ||
ea9f8856 IM |
1945 | error = acpi_video_bus_get_devices(video, device); |
1946 | if (error) | |
91e13aa3 | 1947 | goto err_put_video; |
1da177e4 | 1948 | |
1da177e4 | 1949 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1950 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1951 | video->flags.multihead ? "yes" : "no", | |
1952 | video->flags.rom ? "yes" : "no", | |
1953 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1954 | mutex_lock(&video_list_lock); |
1955 | list_add_tail(&video->entry, &video_bus_head); | |
1956 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1957 | |
67b662e1 AL |
1958 | acpi_video_bus_register_backlight(video); |
1959 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1960 | |
f51e8391 DT |
1961 | return 0; |
1962 | ||
67b662e1 | 1963 | err_put_video: |
f51e8391 DT |
1964 | acpi_video_bus_put_devices(video); |
1965 | kfree(video->attached_array); | |
67b662e1 | 1966 | err_free_video: |
f51e8391 | 1967 | kfree(video); |
db89b4f0 | 1968 | device->driver_data = NULL; |
1da177e4 | 1969 | |
f51e8391 | 1970 | return error; |
1da177e4 LT |
1971 | } |
1972 | ||
51fac838 | 1973 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1974 | { |
4be44fcd | 1975 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1976 | |
1da177e4 LT |
1977 | |
1978 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1979 | return -EINVAL; |
1da177e4 | 1980 | |
50dd0969 | 1981 | video = acpi_driver_data(device); |
1da177e4 | 1982 | |
67b662e1 AL |
1983 | acpi_video_bus_remove_notify_handler(video); |
1984 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1985 | acpi_video_bus_put_devices(video); |
1da177e4 | 1986 | |
67b662e1 AL |
1987 | mutex_lock(&video_list_lock); |
1988 | list_del(&video->entry); | |
1989 | mutex_unlock(&video_list_lock); | |
1990 | ||
6044ec88 | 1991 | kfree(video->attached_array); |
1da177e4 LT |
1992 | kfree(video); |
1993 | ||
d550d98d | 1994 | return 0; |
1da177e4 LT |
1995 | } |
1996 | ||
c6996bdd AC |
1997 | static int __init is_i740(struct pci_dev *dev) |
1998 | { | |
1999 | if (dev->device == 0x00D1) | |
2000 | return 1; | |
2001 | if (dev->device == 0x7000) | |
2002 | return 1; | |
2003 | return 0; | |
2004 | } | |
2005 | ||
74a365b3 MG |
2006 | static int __init intel_opregion_present(void) |
2007 | { | |
c6996bdd | 2008 | int opregion = 0; |
74a365b3 MG |
2009 | struct pci_dev *dev = NULL; |
2010 | u32 address; | |
2011 | ||
2012 | for_each_pci_dev(dev) { | |
2013 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2014 | continue; | |
2015 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2016 | continue; | |
c6996bdd AC |
2017 | /* We don't want to poke around undefined i740 registers */ |
2018 | if (is_i740(dev)) | |
2019 | continue; | |
74a365b3 MG |
2020 | pci_read_config_dword(dev, 0xfc, &address); |
2021 | if (!address) | |
2022 | continue; | |
c6996bdd | 2023 | opregion = 1; |
74a365b3 | 2024 | } |
c6996bdd | 2025 | return opregion; |
74a365b3 MG |
2026 | } |
2027 | ||
8e5c2b77 | 2028 | int acpi_video_register(void) |
1da177e4 | 2029 | { |
8e5c2b77 | 2030 | int result = 0; |
86e437f0 ZY |
2031 | if (register_count) { |
2032 | /* | |
8e5c2b77 RW |
2033 | * if the function of acpi_video_register is already called, |
2034 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
2035 | */ |
2036 | return 0; | |
2037 | } | |
1da177e4 | 2038 | |
67b662e1 AL |
2039 | mutex_init(&video_list_lock); |
2040 | INIT_LIST_HEAD(&video_bus_head); | |
2041 | ||
1da177e4 | 2042 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 2043 | if (result < 0) |
d550d98d | 2044 | return -ENODEV; |
1da177e4 | 2045 | |
86e437f0 ZY |
2046 | /* |
2047 | * When the acpi_video_bus is loaded successfully, increase | |
2048 | * the counter reference. | |
2049 | */ | |
2050 | register_count = 1; | |
2051 | ||
d550d98d | 2052 | return 0; |
1da177e4 | 2053 | } |
8e5c2b77 | 2054 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2055 | |
86e437f0 ZY |
2056 | void acpi_video_unregister(void) |
2057 | { | |
2058 | if (!register_count) { | |
2059 | /* | |
2060 | * If the acpi video bus is already unloaded, don't | |
2061 | * unload it again and return directly. | |
2062 | */ | |
2063 | return; | |
2064 | } | |
2065 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2066 | ||
86e437f0 ZY |
2067 | register_count = 0; |
2068 | ||
2069 | return; | |
2070 | } | |
2071 | EXPORT_SYMBOL(acpi_video_unregister); | |
2072 | ||
1b7f37e1 HG |
2073 | void acpi_video_unregister_backlight(void) |
2074 | { | |
2075 | struct acpi_video_bus *video; | |
2076 | ||
2077 | if (!register_count) | |
2078 | return; | |
2079 | ||
2080 | mutex_lock(&video_list_lock); | |
2081 | list_for_each_entry(video, &video_bus_head, entry) | |
2082 | acpi_video_bus_unregister_backlight(video); | |
2083 | mutex_unlock(&video_list_lock); | |
2084 | } | |
2085 | EXPORT_SYMBOL(acpi_video_unregister_backlight); | |
2086 | ||
74a365b3 MG |
2087 | /* |
2088 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2089 | * the video opregion code to be run first in order to initialise | |
2090 | * state before any ACPI video calls are made. To handle this we defer | |
2091 | * registration of the video class until the opregion code has run. | |
2092 | */ | |
2093 | ||
2094 | static int __init acpi_video_init(void) | |
2095 | { | |
45cb50e6 ZR |
2096 | dmi_check_system(video_dmi_table); |
2097 | ||
74a365b3 MG |
2098 | if (intel_opregion_present()) |
2099 | return 0; | |
2100 | ||
2101 | return acpi_video_register(); | |
2102 | } | |
1da177e4 | 2103 | |
86e437f0 | 2104 | static void __exit acpi_video_exit(void) |
1da177e4 | 2105 | { |
86e437f0 | 2106 | acpi_video_unregister(); |
1da177e4 | 2107 | |
d550d98d | 2108 | return; |
1da177e4 LT |
2109 | } |
2110 | ||
2111 | module_init(acpi_video_init); | |
2112 | module_exit(acpi_video_exit); |