Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
1da177e4 LT |
20 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
21 | */ | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/list.h> | |
bbac81f5 | 28 | #include <linux/mutex.h> |
e9dab196 | 29 | #include <linux/input.h> |
2f3d000a | 30 | #include <linux/backlight.h> |
702ed512 | 31 | #include <linux/thermal.h> |
935e5f29 | 32 | #include <linux/sort.h> |
74a365b3 MG |
33 | #include <linux/pci.h> |
34 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 35 | #include <linux/slab.h> |
eb27cae8 | 36 | #include <linux/dmi.h> |
ac7729da | 37 | #include <linux/suspend.h> |
8b48463f | 38 | #include <linux/acpi.h> |
e92a7162 | 39 | #include <acpi/video.h> |
8b48463f | 40 | #include <asm/uaccess.h> |
1da177e4 | 41 | |
14ca7a47 | 42 | #define PREFIX "ACPI: " |
8c5bd7ad | 43 | |
1da177e4 LT |
44 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
45 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
46 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
47 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
48 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
49 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
50 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
51 | ||
f4715189 TT |
52 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
53 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
54 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
55 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
56 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 57 | |
2f3d000a | 58 | #define MAX_NAME_LEN 20 |
1da177e4 | 59 | |
1da177e4 | 60 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 61 | ACPI_MODULE_NAME("video"); |
1da177e4 | 62 | |
f52fd66d | 63 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 64 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
65 | MODULE_LICENSE("GPL"); |
66 | ||
2843768b | 67 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
68 | module_param(brightness_switch_enabled, bool, 0644); |
69 | ||
c504f8cb ZR |
70 | /* |
71 | * By default, we don't allow duplicate ACPI video bus devices | |
72 | * under the same VGA controller | |
73 | */ | |
90ab5ee9 | 74 | static bool allow_duplicates; |
c504f8cb ZR |
75 | module_param(allow_duplicates, bool, 0644); |
76 | ||
654a182d HG |
77 | static int disable_backlight_sysfs_if = -1; |
78 | module_param(disable_backlight_sysfs_if, int, 0444); | |
79 | ||
e50b9be1 AL |
80 | static bool device_id_scheme = false; |
81 | module_param(device_id_scheme, bool, 0444); | |
82 | ||
83 | static bool only_lcd = false; | |
84 | module_param(only_lcd, bool, 0444); | |
85 | ||
915ea7e4 | 86 | static int register_count; |
2a8b18e9 | 87 | static DEFINE_MUTEX(register_count_mutex); |
67b662e1 AL |
88 | static struct mutex video_list_lock; |
89 | static struct list_head video_bus_head; | |
4be44fcd | 90 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 91 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 92 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
93a291df | 93 | void acpi_video_detect_exit(void); |
1da177e4 | 94 | |
1ba90e3a TR |
95 | static const struct acpi_device_id video_device_ids[] = { |
96 | {ACPI_VIDEO_HID, 0}, | |
97 | {"", 0}, | |
98 | }; | |
99 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
100 | ||
1da177e4 | 101 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 102 | .name = "video", |
1da177e4 | 103 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 104 | .ids = video_device_ids, |
1da177e4 LT |
105 | .ops = { |
106 | .add = acpi_video_bus_add, | |
107 | .remove = acpi_video_bus_remove, | |
7015558f | 108 | .notify = acpi_video_bus_notify, |
4be44fcd | 109 | }, |
1da177e4 LT |
110 | }; |
111 | ||
112 | struct acpi_video_bus_flags { | |
4be44fcd LB |
113 | u8 multihead:1; /* can switch video heads */ |
114 | u8 rom:1; /* can retrieve a video rom */ | |
115 | u8 post:1; /* can configure the head to */ | |
116 | u8 reserved:5; | |
1da177e4 LT |
117 | }; |
118 | ||
119 | struct acpi_video_bus_cap { | |
21fcb34e FC |
120 | u8 _DOS:1; /* Enable/Disable output switching */ |
121 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
122 | u8 _ROM:1; /* Get ROM Data */ | |
123 | u8 _GPD:1; /* Get POST Device */ | |
124 | u8 _SPD:1; /* Set POST Device */ | |
125 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 126 | u8 reserved:2; |
1da177e4 LT |
127 | }; |
128 | ||
4be44fcd LB |
129 | struct acpi_video_device_attrib { |
130 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
131 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
132 | u32 display_type:4; /* Describe the specific type in use */ | |
133 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
134 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
135 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 136 | the VGA device. */ |
21fcb34e FC |
137 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
138 | u32 reserved:10; /* Must be 0 */ | |
139 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
140 | }; |
141 | ||
142 | struct acpi_video_enumerated_device { | |
143 | union { | |
144 | u32 int_val; | |
4be44fcd | 145 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
146 | } value; |
147 | struct acpi_video_device *bind_info; | |
148 | }; | |
149 | ||
150 | struct acpi_video_bus { | |
e6afa0de | 151 | struct acpi_device *device; |
99678ed7 | 152 | bool backlight_registered; |
4be44fcd | 153 | u8 dos_setting; |
1da177e4 | 154 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd | 155 | u8 attached_count; |
b4df4636 | 156 | u8 child_count; |
4be44fcd | 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; | |
8ab58e8e LT |
205 | struct delayed_work switch_brightness_work; |
206 | int switch_brightness_event; | |
4be44fcd LB |
207 | struct acpi_video_bus *video; |
208 | struct acpi_device *dev; | |
1da177e4 | 209 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 210 | struct backlight_device *backlight; |
4a703a8f | 211 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
212 | }; |
213 | ||
b7171ae7 | 214 | static const char device_decode[][30] = { |
1da177e4 LT |
215 | "motherboard VGA device", |
216 | "PCI VGA device", | |
217 | "AGP VGA device", | |
218 | "UNKNOWN", | |
219 | }; | |
220 | ||
4be44fcd LB |
221 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
222 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
223 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
224 | struct acpi_video_device *device); | |
1da177e4 | 225 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
226 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
227 | int level); | |
228 | static int acpi_video_device_lcd_get_level_current( | |
229 | struct acpi_video_device *device, | |
a89803df | 230 | unsigned long long *level, bool raw); |
4be44fcd LB |
231 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
232 | u32 level_current, u32 event); | |
8ab58e8e | 233 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 234 | |
21fcb34e | 235 | /* backlight device sysfs support */ |
2f3d000a YL |
236 | static int acpi_video_get_brightness(struct backlight_device *bd) |
237 | { | |
27663c58 | 238 | unsigned long long cur_level; |
38531e6f | 239 | int i; |
7c364e79 | 240 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 241 | |
a89803df | 242 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 243 | return -EINVAL; |
38531e6f MG |
244 | for (i = 2; i < vd->brightness->count; i++) { |
245 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
246 | /* |
247 | * The first two entries are special - see page 575 | |
248 | * of the ACPI spec 3.0 | |
249 | */ | |
915ea7e4 | 250 | return i - 2; |
38531e6f MG |
251 | } |
252 | return 0; | |
2f3d000a YL |
253 | } |
254 | ||
255 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
256 | { | |
24450c7a | 257 | int request_level = bd->props.brightness + 2; |
7c364e79 | 258 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 259 | |
8ab58e8e | 260 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
261 | return acpi_video_device_lcd_set_level(vd, |
262 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
263 | } |
264 | ||
acc2472e | 265 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
266 | .get_brightness = acpi_video_get_brightness, |
267 | .update_status = acpi_video_set_brightness, | |
268 | }; | |
269 | ||
702ed512 | 270 | /* thermal cooling device callbacks */ |
4a703a8f | 271 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 272 | long *state) |
702ed512 | 273 | { |
4a703a8f | 274 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
275 | struct acpi_video_device *video = acpi_driver_data(device); |
276 | ||
6503e5df MG |
277 | *state = video->brightness->count - 3; |
278 | return 0; | |
702ed512 ZR |
279 | } |
280 | ||
4a703a8f | 281 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 282 | long *state) |
702ed512 | 283 | { |
4a703a8f | 284 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 285 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 286 | unsigned long long level; |
6503e5df | 287 | int offset; |
702ed512 | 288 | |
a89803df | 289 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 290 | return -EINVAL; |
6503e5df MG |
291 | for (offset = 2; offset < video->brightness->count; offset++) |
292 | if (level == video->brightness->levels[offset]) { | |
293 | *state = video->brightness->count - offset - 1; | |
294 | return 0; | |
295 | } | |
702ed512 ZR |
296 | |
297 | return -EINVAL; | |
298 | } | |
299 | ||
300 | static int | |
4a703a8f | 301 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 302 | { |
4a703a8f | 303 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
304 | struct acpi_video_device *video = acpi_driver_data(device); |
305 | int level; | |
306 | ||
915ea7e4 | 307 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
308 | return -EINVAL; |
309 | ||
310 | state = video->brightness->count - state; | |
915ea7e4 | 311 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
312 | return acpi_video_device_lcd_set_level(video, level); |
313 | } | |
314 | ||
9c8b04be | 315 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
316 | .get_max_state = video_get_max_state, |
317 | .get_cur_state = video_get_cur_state, | |
318 | .set_cur_state = video_set_cur_state, | |
319 | }; | |
320 | ||
21fcb34e FC |
321 | /* |
322 | * -------------------------------------------------------------------------- | |
323 | * Video Management | |
324 | * -------------------------------------------------------------------------- | |
325 | */ | |
1da177e4 | 326 | |
1da177e4 | 327 | static int |
4be44fcd LB |
328 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
329 | union acpi_object **levels) | |
1da177e4 | 330 | { |
4be44fcd LB |
331 | int status; |
332 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
333 | union acpi_object *obj; | |
1da177e4 | 334 | |
1da177e4 LT |
335 | |
336 | *levels = NULL; | |
337 | ||
90130268 | 338 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 339 | if (!ACPI_SUCCESS(status)) |
d550d98d | 340 | return status; |
4be44fcd | 341 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 342 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 343 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
344 | status = -EFAULT; |
345 | goto err; | |
346 | } | |
347 | ||
348 | *levels = obj; | |
349 | ||
d550d98d | 350 | return 0; |
1da177e4 | 351 | |
915ea7e4 | 352 | err: |
6044ec88 | 353 | kfree(buffer.pointer); |
1da177e4 | 354 | |
d550d98d | 355 | return status; |
1da177e4 LT |
356 | } |
357 | ||
358 | static int | |
4be44fcd | 359 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 360 | { |
24450c7a | 361 | int status; |
9e6dada9 | 362 | int state; |
1da177e4 | 363 | |
0db98202 JL |
364 | status = acpi_execute_simple_method(device->dev->handle, |
365 | "_BCM", level); | |
24450c7a ZR |
366 | if (ACPI_FAILURE(status)) { |
367 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
368 | return -EIO; | |
369 | } | |
370 | ||
4500ca8e | 371 | device->brightness->curr = level; |
9e6dada9 | 372 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 373 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
374 | if (device->backlight) |
375 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
376 | return 0; |
377 | } | |
9e6dada9 | 378 | |
24450c7a ZR |
379 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
380 | return -EINVAL; | |
1da177e4 LT |
381 | } |
382 | ||
45cb50e6 ZR |
383 | /* |
384 | * For some buggy _BQC methods, we need to add a constant value to | |
385 | * the _BQC return value to get the actual current brightness level | |
386 | */ | |
387 | ||
388 | static int bqc_offset_aml_bug_workaround; | |
7ee33baa | 389 | static int video_set_bqc_offset(const struct dmi_system_id *d) |
45cb50e6 ZR |
390 | { |
391 | bqc_offset_aml_bug_workaround = 9; | |
392 | return 0; | |
393 | } | |
394 | ||
7ee33baa | 395 | static int video_disable_backlight_sysfs_if( |
654a182d HG |
396 | const struct dmi_system_id *d) |
397 | { | |
398 | if (disable_backlight_sysfs_if == -1) | |
399 | disable_backlight_sysfs_if = 1; | |
400 | return 0; | |
401 | } | |
402 | ||
e50b9be1 AL |
403 | static int video_set_device_id_scheme(const struct dmi_system_id *d) |
404 | { | |
405 | device_id_scheme = true; | |
406 | return 0; | |
407 | } | |
408 | ||
409 | static int video_enable_only_lcd(const struct dmi_system_id *d) | |
410 | { | |
411 | only_lcd = true; | |
412 | return 0; | |
413 | } | |
414 | ||
7ee33baa | 415 | static struct dmi_system_id video_dmi_table[] = { |
45cb50e6 ZR |
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 | }, | |
5f24079b | 459 | |
654a182d HG |
460 | /* |
461 | * Some machines have a broken acpi-video interface for brightness | |
462 | * control, but still need an acpi_video_device_lcd_set_level() call | |
463 | * on resume to turn the backlight power on. We Enable backlight | |
464 | * control on these systems, but do not register a backlight sysfs | |
465 | * as brightness control does not work. | |
466 | */ | |
467 | { | |
468 | /* https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ | |
469 | .callback = video_disable_backlight_sysfs_if, | |
470 | .ident = "Toshiba Portege R830", | |
471 | .matches = { | |
472 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
473 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R830"), | |
474 | }, | |
475 | }, | |
e50b9be1 AL |
476 | /* |
477 | * Some machine's _DOD IDs don't have bit 31(Device ID Scheme) set | |
478 | * but the IDs actually follow the Device ID Scheme. | |
479 | */ | |
480 | { | |
481 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
482 | .callback = video_set_device_id_scheme, | |
483 | .ident = "ESPRIMO Mobile M9410", | |
484 | .matches = { | |
485 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
486 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"), | |
487 | }, | |
488 | }, | |
489 | /* | |
490 | * Some machines have multiple video output devices, but only the one | |
491 | * that is the type of LCD can do the backlight control so we should not | |
492 | * register backlight interface for other video output devices. | |
493 | */ | |
494 | { | |
495 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
496 | .callback = video_enable_only_lcd, | |
497 | .ident = "ESPRIMO Mobile M9410", | |
498 | .matches = { | |
499 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
500 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"), | |
501 | }, | |
502 | }, | |
45cb50e6 ZR |
503 | {} |
504 | }; | |
505 | ||
994fa63c DB |
506 | static unsigned long long |
507 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
508 | unsigned long long bqc_value) | |
509 | { | |
510 | unsigned long long level; | |
511 | ||
512 | if (device->brightness->flags._BQC_use_index) { | |
513 | /* | |
514 | * _BQC returns an index that doesn't account for | |
515 | * the first 2 items with special meaning, so we need | |
516 | * to compensate for that by offsetting ourselves | |
517 | */ | |
518 | if (device->brightness->flags._BCL_reversed) | |
519 | bqc_value = device->brightness->count - 3 - bqc_value; | |
520 | ||
521 | level = device->brightness->levels[bqc_value + 2]; | |
522 | } else { | |
523 | level = bqc_value; | |
524 | } | |
525 | ||
526 | level += bqc_offset_aml_bug_workaround; | |
527 | ||
528 | return level; | |
529 | } | |
530 | ||
1da177e4 | 531 | static int |
4be44fcd | 532 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 533 | unsigned long long *level, bool raw) |
1da177e4 | 534 | { |
c8890f90 | 535 | acpi_status status = AE_OK; |
4e231fa4 | 536 | int i; |
c8890f90 | 537 | |
c60d638e ZR |
538 | if (device->cap._BQC || device->cap._BCQ) { |
539 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
540 | ||
541 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
542 | NULL, level); |
543 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
544 | if (raw) { |
545 | /* | |
546 | * Caller has indicated he wants the raw | |
547 | * value returned by _BQC, so don't furtherly | |
548 | * mess with the value. | |
549 | */ | |
550 | return 0; | |
551 | } | |
552 | ||
994fa63c | 553 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 554 | |
4e231fa4 VS |
555 | for (i = 2; i < device->brightness->count; i++) |
556 | if (device->brightness->levels[i] == *level) { | |
557 | device->brightness->curr = *level; | |
558 | return 0; | |
915ea7e4 | 559 | } |
a89803df DB |
560 | /* |
561 | * BQC returned an invalid level. | |
562 | * Stop using it. | |
563 | */ | |
564 | ACPI_WARNING((AE_INFO, | |
565 | "%s returned an invalid level", | |
566 | buf)); | |
567 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 568 | } else { |
21fcb34e FC |
569 | /* |
570 | * Fixme: | |
c8890f90 ZR |
571 | * should we return an error or ignore this failure? |
572 | * dev->brightness->curr is a cached value which stores | |
573 | * the correct current backlight level in most cases. | |
574 | * ACPI video backlight still works w/ buggy _BQC. | |
575 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
576 | */ | |
c60d638e ZR |
577 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
578 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
579 | } |
580 | } | |
581 | ||
4500ca8e | 582 | *level = device->brightness->curr; |
c8890f90 | 583 | return 0; |
1da177e4 LT |
584 | } |
585 | ||
586 | static int | |
4be44fcd LB |
587 | acpi_video_device_EDID(struct acpi_video_device *device, |
588 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 589 | { |
4be44fcd LB |
590 | int status; |
591 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
592 | union acpi_object *obj; | |
593 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
594 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 595 | |
1da177e4 LT |
596 | |
597 | *edid = NULL; | |
598 | ||
599 | if (!device) | |
d550d98d | 600 | return -ENODEV; |
1da177e4 LT |
601 | if (length == 128) |
602 | arg0.integer.value = 1; | |
603 | else if (length == 256) | |
604 | arg0.integer.value = 2; | |
605 | else | |
d550d98d | 606 | return -EINVAL; |
1da177e4 | 607 | |
90130268 | 608 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 609 | if (ACPI_FAILURE(status)) |
d550d98d | 610 | return -ENODEV; |
1da177e4 | 611 | |
50dd0969 | 612 | obj = buffer.pointer; |
1da177e4 LT |
613 | |
614 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
615 | *edid = obj; | |
616 | else { | |
6468463a | 617 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
618 | status = -EFAULT; |
619 | kfree(obj); | |
620 | } | |
621 | ||
d550d98d | 622 | return status; |
1da177e4 LT |
623 | } |
624 | ||
1da177e4 LT |
625 | /* bus */ |
626 | ||
1da177e4 LT |
627 | /* |
628 | * Arg: | |
21fcb34e FC |
629 | * video : video bus device pointer |
630 | * bios_flag : | |
1da177e4 LT |
631 | * 0. The system BIOS should NOT automatically switch(toggle) |
632 | * the active display output. | |
633 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 634 | * active display output. No switch event. |
1da177e4 LT |
635 | * 2. The _DGS value should be locked. |
636 | * 3. The system BIOS should not automatically switch (toggle) the | |
637 | * active display output, but instead generate the display switch | |
638 | * event notify code. | |
639 | * lcd_flag : | |
640 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 641 | * of the LCD when the power changes from AC to DC |
21fcb34e | 642 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 643 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 644 | * Return Value: |
ea9f8856 | 645 | * -EINVAL wrong arg. |
1da177e4 LT |
646 | */ |
647 | ||
648 | static int | |
4be44fcd | 649 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 650 | { |
ea9f8856 | 651 | acpi_status status; |
1da177e4 | 652 | |
b0373843 ZR |
653 | if (!video->cap._DOS) |
654 | return 0; | |
1da177e4 | 655 | |
ea9f8856 IM |
656 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
657 | return -EINVAL; | |
0db98202 JL |
658 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
659 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
660 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
661 | if (ACPI_FAILURE(status)) |
662 | return -EIO; | |
1da177e4 | 663 | |
ea9f8856 | 664 | return 0; |
1da177e4 LT |
665 | } |
666 | ||
935e5f29 ZR |
667 | /* |
668 | * Simple comparison function used to sort backlight levels. | |
669 | */ | |
670 | ||
671 | static int | |
672 | acpi_video_cmp_level(const void *a, const void *b) | |
673 | { | |
674 | return *(int *)a - *(int *)b; | |
675 | } | |
676 | ||
a50188da AL |
677 | /* |
678 | * Decides if _BQC/_BCQ for this system is usable | |
679 | * | |
680 | * We do this by changing the level first and then read out the current | |
681 | * brightness level, if the value does not match, find out if it is using | |
682 | * index. If not, clear the _BQC/_BCQ capability. | |
683 | */ | |
684 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
685 | int max_level, int current_level) | |
686 | { | |
687 | struct acpi_video_device_brightness *br = device->brightness; | |
688 | int result; | |
689 | unsigned long long level; | |
690 | int test_level; | |
691 | ||
692 | /* don't mess with existing known broken systems */ | |
693 | if (bqc_offset_aml_bug_workaround) | |
694 | return 0; | |
695 | ||
696 | /* | |
697 | * Some systems always report current brightness level as maximum | |
698 | * through _BQC, we need to test another value for them. | |
699 | */ | |
b3b301c5 | 700 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
701 | |
702 | result = acpi_video_device_lcd_set_level(device, test_level); | |
703 | if (result) | |
704 | return result; | |
705 | ||
706 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
707 | if (result) | |
708 | return result; | |
709 | ||
710 | if (level != test_level) { | |
711 | /* buggy _BQC found, need to find out if it uses index */ | |
712 | if (level < br->count) { | |
713 | if (br->flags._BCL_reversed) | |
714 | level = br->count - 3 - level; | |
715 | if (br->levels[level + 2] == test_level) | |
716 | br->flags._BQC_use_index = 1; | |
717 | } | |
718 | ||
719 | if (!br->flags._BQC_use_index) | |
720 | device->cap._BQC = device->cap._BCQ = 0; | |
721 | } | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
726 | ||
1da177e4 | 727 | /* |
21fcb34e FC |
728 | * Arg: |
729 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
730 | * |
731 | * Return Value: | |
469778c1 JJ |
732 | * Maximum brightness level |
733 | * | |
734 | * Allocate and initialize device->brightness. | |
735 | */ | |
736 | ||
737 | static int | |
738 | acpi_video_init_brightness(struct acpi_video_device *device) | |
739 | { | |
740 | union acpi_object *obj = NULL; | |
d32f6947 | 741 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 742 | unsigned long long level, level_old; |
469778c1 JJ |
743 | union acpi_object *o; |
744 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 745 | int result = -EINVAL; |
bd8ba205 | 746 | u32 value; |
469778c1 JJ |
747 | |
748 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
749 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
750 | "LCD brightness level\n")); | |
751 | goto out; | |
752 | } | |
753 | ||
754 | if (obj->package.count < 2) | |
755 | goto out; | |
756 | ||
757 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
758 | if (!br) { | |
759 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 760 | result = -ENOMEM; |
469778c1 JJ |
761 | goto out; |
762 | } | |
763 | ||
d32f6947 | 764 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 765 | GFP_KERNEL); |
1a7c618a ZR |
766 | if (!br->levels) { |
767 | result = -ENOMEM; | |
469778c1 | 768 | goto out_free; |
1a7c618a | 769 | } |
469778c1 JJ |
770 | |
771 | for (i = 0; i < obj->package.count; i++) { | |
772 | o = (union acpi_object *)&obj->package.elements[i]; | |
773 | if (o->type != ACPI_TYPE_INTEGER) { | |
774 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
775 | continue; | |
776 | } | |
bd8ba205 HG |
777 | value = (u32) o->integer.value; |
778 | /* Skip duplicate entries */ | |
779 | if (count > 2 && br->levels[count - 1] == value) | |
780 | continue; | |
781 | ||
782 | br->levels[count] = value; | |
469778c1 JJ |
783 | |
784 | if (br->levels[count] > max_level) | |
785 | max_level = br->levels[count]; | |
786 | count++; | |
787 | } | |
788 | ||
d32f6947 ZR |
789 | /* |
790 | * some buggy BIOS don't export the levels | |
791 | * when machine is on AC/Battery in _BCL package. | |
792 | * In this case, the first two elements in _BCL packages | |
793 | * are also supported brightness levels that OS should take care of. | |
794 | */ | |
90af2cf6 ZR |
795 | for (i = 2; i < count; i++) { |
796 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 797 | level_ac_battery++; |
90af2cf6 ZR |
798 | if (br->levels[i] == br->levels[1]) |
799 | level_ac_battery++; | |
800 | } | |
d32f6947 ZR |
801 | |
802 | if (level_ac_battery < 2) { | |
803 | level_ac_battery = 2 - level_ac_battery; | |
804 | br->flags._BCL_no_ac_battery_levels = 1; | |
805 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
806 | br->levels[i] = br->levels[i - level_ac_battery]; | |
807 | count += level_ac_battery; | |
808 | } else if (level_ac_battery > 2) | |
bf6787eb | 809 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 810 | |
d80fb99f ZR |
811 | /* Check if the _BCL package is in a reversed order */ |
812 | if (max_level == br->levels[2]) { | |
813 | br->flags._BCL_reversed = 1; | |
814 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
815 | acpi_video_cmp_level, NULL); | |
816 | } else if (max_level != br->levels[count - 1]) | |
817 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 818 | "Found unordered _BCL package")); |
469778c1 JJ |
819 | |
820 | br->count = count; | |
821 | device->brightness = br; | |
1a7c618a | 822 | |
1a7c618a | 823 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 824 | br->curr = level = max_level; |
e047cca6 ZR |
825 | |
826 | if (!device->cap._BQC) | |
827 | goto set_level; | |
828 | ||
a89803df DB |
829 | result = acpi_video_device_lcd_get_level_current(device, |
830 | &level_old, true); | |
1a7c618a ZR |
831 | if (result) |
832 | goto out_free_levels; | |
833 | ||
a50188da | 834 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
835 | if (result) |
836 | goto out_free_levels; | |
a50188da AL |
837 | /* |
838 | * cap._BQC may get cleared due to _BQC is found to be broken | |
839 | * in acpi_video_bqc_quirk, so check again here. | |
840 | */ | |
841 | if (!device->cap._BQC) | |
842 | goto set_level; | |
e047cca6 | 843 | |
545ef368 AL |
844 | level = acpi_video_bqc_value_to_level(device, level_old); |
845 | /* | |
846 | * On some buggy laptops, _BQC returns an uninitialized | |
847 | * value when invoked for the first time, i.e. | |
848 | * level_old is invalid (no matter whether it's a level | |
849 | * or an index). Set the backlight to max_level in this case. | |
850 | */ | |
851 | for (i = 2; i < br->count; i++) | |
852 | if (level == br->levels[i]) | |
853 | break; | |
854 | if (i == br->count || !level) | |
855 | level = max_level; | |
e047cca6 | 856 | |
e047cca6 | 857 | set_level: |
90c53ca4 | 858 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
859 | if (result) |
860 | goto out_free_levels; | |
1a7c618a | 861 | |
d32f6947 ZR |
862 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
863 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 864 | kfree(obj); |
1a7c618a | 865 | return result; |
469778c1 JJ |
866 | |
867 | out_free_levels: | |
868 | kfree(br->levels); | |
869 | out_free: | |
870 | kfree(br); | |
871 | out: | |
872 | device->brightness = NULL; | |
873 | kfree(obj); | |
1a7c618a | 874 | return result; |
469778c1 JJ |
875 | } |
876 | ||
877 | /* | |
878 | * Arg: | |
879 | * device : video output device (LCD, CRT, ..) | |
880 | * | |
881 | * Return Value: | |
21fcb34e | 882 | * None |
1da177e4 | 883 | * |
98fb8fe1 | 884 | * Find out all required AML methods defined under the output |
1da177e4 LT |
885 | * device. |
886 | */ | |
887 | ||
4be44fcd | 888 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 889 | { |
952c63e9 | 890 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 891 | device->cap._ADR = 1; |
952c63e9 | 892 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 893 | device->cap._BCL = 1; |
952c63e9 | 894 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 895 | device->cap._BCM = 1; |
952c63e9 | 896 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 897 | device->cap._BQC = 1; |
952c63e9 | 898 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
899 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
900 | device->cap._BCQ = 1; | |
901 | } | |
902 | ||
952c63e9 | 903 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 904 | device->cap._DDC = 1; |
1da177e4 LT |
905 | } |
906 | ||
907 | /* | |
21fcb34e FC |
908 | * Arg: |
909 | * device : video output device (VGA) | |
1da177e4 LT |
910 | * |
911 | * Return Value: | |
21fcb34e | 912 | * None |
1da177e4 | 913 | * |
98fb8fe1 | 914 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
915 | */ |
916 | ||
4be44fcd | 917 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 918 | { |
952c63e9 | 919 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 920 | video->cap._DOS = 1; |
952c63e9 | 921 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 922 | video->cap._DOD = 1; |
952c63e9 | 923 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 924 | video->cap._ROM = 1; |
952c63e9 | 925 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 926 | video->cap._GPD = 1; |
952c63e9 | 927 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 928 | video->cap._SPD = 1; |
952c63e9 | 929 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 930 | video->cap._VPO = 1; |
1da177e4 LT |
931 | } |
932 | ||
933 | /* | |
934 | * Check whether the video bus device has required AML method to | |
935 | * support the desired features | |
936 | */ | |
937 | ||
4be44fcd | 938 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 939 | { |
4be44fcd | 940 | acpi_status status = -ENOENT; |
1e4cffe7 | 941 | struct pci_dev *dev; |
1da177e4 LT |
942 | |
943 | if (!video) | |
d550d98d | 944 | return -EINVAL; |
1da177e4 | 945 | |
1e4cffe7 | 946 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
947 | if (!dev) |
948 | return -ENODEV; | |
1e4cffe7 | 949 | pci_dev_put(dev); |
22c13f9d | 950 | |
21fcb34e FC |
951 | /* |
952 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
953 | * to check well known required nodes. |
954 | */ | |
955 | ||
98fb8fe1 | 956 | /* Does this device support video switching? */ |
3a1151e3 SB |
957 | if (video->cap._DOS || video->cap._DOD) { |
958 | if (!video->cap._DOS) { | |
959 | printk(KERN_WARNING FW_BUG | |
960 | "ACPI(%s) defines _DOD but not _DOS\n", | |
961 | acpi_device_bid(video->device)); | |
962 | } | |
1da177e4 LT |
963 | video->flags.multihead = 1; |
964 | status = 0; | |
965 | } | |
966 | ||
98fb8fe1 | 967 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 968 | if (video->cap._ROM) { |
1da177e4 LT |
969 | video->flags.rom = 1; |
970 | status = 0; | |
971 | } | |
972 | ||
98fb8fe1 | 973 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 974 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
975 | video->flags.post = 1; |
976 | status = 0; | |
977 | } | |
978 | ||
d550d98d | 979 | return status; |
1da177e4 LT |
980 | } |
981 | ||
21fcb34e FC |
982 | /* |
983 | * -------------------------------------------------------------------------- | |
984 | * Driver Interface | |
985 | * -------------------------------------------------------------------------- | |
986 | */ | |
1da177e4 LT |
987 | |
988 | /* device interface */ | |
915ea7e4 | 989 | static struct acpi_video_device_attrib * |
82cae999 RZ |
990 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
991 | { | |
78eed028 DT |
992 | struct acpi_video_enumerated_device *ids; |
993 | int i; | |
994 | ||
995 | for (i = 0; i < video->attached_count; i++) { | |
996 | ids = &video->attached_array[i]; | |
997 | if ((ids->value.int_val & 0xffff) == device_id) | |
998 | return &ids->value.attrib; | |
999 | } | |
82cae999 | 1000 | |
82cae999 RZ |
1001 | return NULL; |
1002 | } | |
1da177e4 | 1003 | |
e92a7162 MG |
1004 | static int |
1005 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1006 | unsigned long device_id) | |
1007 | { | |
1008 | struct acpi_video_enumerated_device *ids; | |
1009 | int i; | |
1010 | ||
1011 | for (i = 0; i < video->attached_count; i++) { | |
1012 | ids = &video->attached_array[i]; | |
1013 | if ((ids->value.int_val & 0xffff) == device_id) | |
1014 | return ids->value.int_val; | |
1015 | } | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
1da177e4 | 1020 | static int |
4be44fcd LB |
1021 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1022 | struct acpi_video_bus *video) | |
1da177e4 | 1023 | { |
27663c58 | 1024 | unsigned long long device_id; |
e92a7162 | 1025 | int status, device_type; |
4be44fcd | 1026 | struct acpi_video_device *data; |
915ea7e4 | 1027 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1028 | |
4be44fcd LB |
1029 | status = |
1030 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1031 | /* Some device omits _ADR, we skip them instead of fail */ |
1032 | if (ACPI_FAILURE(status)) | |
1033 | return 0; | |
1da177e4 | 1034 | |
91e13aa3 AL |
1035 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1036 | if (!data) | |
1037 | return -ENOMEM; | |
82cae999 | 1038 | |
91e13aa3 AL |
1039 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1040 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1041 | device->driver_data = data; | |
1042 | ||
1043 | data->device_id = device_id; | |
1044 | data->video = video; | |
1045 | data->dev = device; | |
8ab58e8e LT |
1046 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1047 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1048 | |
1049 | attribute = acpi_video_get_device_attr(video, device_id); | |
1050 | ||
e50b9be1 | 1051 | if (attribute && (attribute->device_id_scheme || device_id_scheme)) { |
91e13aa3 AL |
1052 | switch (attribute->display_type) { |
1053 | case ACPI_VIDEO_DISPLAY_CRT: | |
1054 | data->flags.crt = 1; | |
1055 | break; | |
1056 | case ACPI_VIDEO_DISPLAY_TV: | |
1057 | data->flags.tvout = 1; | |
1058 | break; | |
1059 | case ACPI_VIDEO_DISPLAY_DVI: | |
1060 | data->flags.dvi = 1; | |
1061 | break; | |
1062 | case ACPI_VIDEO_DISPLAY_LCD: | |
1063 | data->flags.lcd = 1; | |
1064 | break; | |
1065 | default: | |
1066 | data->flags.unknown = 1; | |
1067 | break; | |
1068 | } | |
915ea7e4 | 1069 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1070 | data->flags.bios = 1; |
1071 | } else { | |
1072 | /* Check for legacy IDs */ | |
1073 | device_type = acpi_video_get_device_type(video, device_id); | |
1074 | /* Ignore bits 16 and 18-20 */ | |
1075 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1076 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1077 | data->flags.crt = 1; | |
1078 | break; | |
1079 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1080 | data->flags.lcd = 1; | |
1081 | break; | |
1082 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1083 | data->flags.tvout = 1; | |
1084 | break; | |
1085 | default: | |
1086 | data->flags.unknown = 1; | |
e92a7162 | 1087 | } |
91e13aa3 | 1088 | } |
4be44fcd | 1089 | |
91e13aa3 AL |
1090 | acpi_video_device_bind(video, data); |
1091 | acpi_video_device_find_cap(data); | |
1da177e4 | 1092 | |
91e13aa3 AL |
1093 | mutex_lock(&video->device_list_lock); |
1094 | list_add_tail(&data->entry, &video->video_device_list); | |
1095 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1096 | |
91e13aa3 | 1097 | return status; |
1da177e4 LT |
1098 | } |
1099 | ||
1100 | /* | |
1101 | * Arg: | |
21fcb34e | 1102 | * video : video bus device |
1da177e4 LT |
1103 | * |
1104 | * Return: | |
21fcb34e FC |
1105 | * none |
1106 | * | |
1107 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1108 | * bind the ids with the corresponding video devices |
1109 | * under the video bus. | |
4be44fcd | 1110 | */ |
1da177e4 | 1111 | |
4be44fcd | 1112 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1113 | { |
ff102ea9 DT |
1114 | struct acpi_video_device *dev; |
1115 | ||
bbac81f5 | 1116 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1117 | |
1118 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1119 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1120 | |
bbac81f5 | 1121 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1122 | } |
1123 | ||
1124 | /* | |
1125 | * Arg: | |
21fcb34e FC |
1126 | * video : video bus device |
1127 | * device : video output device under the video | |
1128 | * bus | |
1da177e4 LT |
1129 | * |
1130 | * Return: | |
21fcb34e FC |
1131 | * none |
1132 | * | |
1da177e4 LT |
1133 | * Bind the ids with the corresponding video devices |
1134 | * under the video bus. | |
4be44fcd | 1135 | */ |
1da177e4 LT |
1136 | |
1137 | static void | |
4be44fcd LB |
1138 | acpi_video_device_bind(struct acpi_video_bus *video, |
1139 | struct acpi_video_device *device) | |
1da177e4 | 1140 | { |
78eed028 | 1141 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1142 | int i; |
1da177e4 | 1143 | |
78eed028 DT |
1144 | for (i = 0; i < video->attached_count; i++) { |
1145 | ids = &video->attached_array[i]; | |
1146 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1147 | ids->bind_info = device; | |
1da177e4 LT |
1148 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1149 | } | |
1150 | } | |
1da177e4 LT |
1151 | } |
1152 | ||
0b8db271 AL |
1153 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1154 | { | |
1155 | struct acpi_video_bus *video = device->video; | |
1156 | int i; | |
1157 | ||
b4df4636 AL |
1158 | /* |
1159 | * If we have a broken _DOD or we have more than 8 output devices | |
1160 | * under the graphics controller node that we can't proper deal with | |
1161 | * in the operation region code currently, no need to test. | |
1162 | */ | |
1163 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1164 | return true; |
1165 | ||
1166 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1167 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1168 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1169 | return true; |
1170 | } | |
1171 | ||
1172 | return false; | |
1173 | } | |
1174 | ||
1da177e4 LT |
1175 | /* |
1176 | * Arg: | |
21fcb34e | 1177 | * video : video bus device |
1da177e4 LT |
1178 | * |
1179 | * Return: | |
21fcb34e FC |
1180 | * < 0 : error |
1181 | * | |
1da177e4 LT |
1182 | * Call _DOD to enumerate all devices attached to display adapter |
1183 | * | |
4be44fcd | 1184 | */ |
1da177e4 LT |
1185 | |
1186 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1187 | { | |
4be44fcd LB |
1188 | int status; |
1189 | int count; | |
1190 | int i; | |
78eed028 | 1191 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1192 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1193 | union acpi_object *dod = NULL; | |
1194 | union acpi_object *obj; | |
1da177e4 | 1195 | |
90130268 | 1196 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1197 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1198 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1199 | return status; |
1da177e4 LT |
1200 | } |
1201 | ||
50dd0969 | 1202 | dod = buffer.pointer; |
1da177e4 | 1203 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1204 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1205 | status = -EFAULT; |
1206 | goto out; | |
1207 | } | |
1208 | ||
1209 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1210 | dod->package.count)); |
1da177e4 | 1211 | |
78eed028 DT |
1212 | active_list = kcalloc(1 + dod->package.count, |
1213 | sizeof(struct acpi_video_enumerated_device), | |
1214 | GFP_KERNEL); | |
1215 | if (!active_list) { | |
1da177e4 LT |
1216 | status = -ENOMEM; |
1217 | goto out; | |
1218 | } | |
1219 | ||
1220 | count = 0; | |
1221 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1222 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1223 | |
1224 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1225 | printk(KERN_ERR PREFIX |
1226 | "Invalid _DOD data in element %d\n", i); | |
1227 | continue; | |
1da177e4 | 1228 | } |
78eed028 DT |
1229 | |
1230 | active_list[count].value.int_val = obj->integer.value; | |
1231 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1232 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1233 | (int)obj->integer.value)); | |
1da177e4 LT |
1234 | count++; |
1235 | } | |
1da177e4 | 1236 | |
6044ec88 | 1237 | kfree(video->attached_array); |
4be44fcd | 1238 | |
78eed028 | 1239 | video->attached_array = active_list; |
1da177e4 | 1240 | video->attached_count = count; |
78eed028 | 1241 | |
915ea7e4 | 1242 | out: |
02438d87 | 1243 | kfree(buffer.pointer); |
d550d98d | 1244 | return status; |
1da177e4 LT |
1245 | } |
1246 | ||
4be44fcd LB |
1247 | static int |
1248 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1249 | u32 level_current, u32 event) | |
1da177e4 | 1250 | { |
63f0edfc | 1251 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1252 | max = max_below = 0; |
1253 | min = min_above = 255; | |
63f0edfc | 1254 | /* Find closest level to level_current */ |
0a3db1ce | 1255 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1256 | l = device->brightness->levels[i]; |
1257 | if (abs(l - level_current) < abs(delta)) { | |
1258 | delta = l - level_current; | |
1259 | if (!delta) | |
1260 | break; | |
1261 | } | |
1262 | } | |
1263 | /* Ajust level_current to closest available level */ | |
1264 | level_current += delta; | |
0a3db1ce | 1265 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1266 | l = device->brightness->levels[i]; |
1267 | if (l < min) | |
1268 | min = l; | |
1269 | if (l > max) | |
1270 | max = l; | |
1271 | if (l < min_above && l > level_current) | |
1272 | min_above = l; | |
1273 | if (l > max_below && l < level_current) | |
1274 | max_below = l; | |
1275 | } | |
1276 | ||
1277 | switch (event) { | |
1278 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1279 | return (level_current < max) ? min_above : min; | |
1280 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1281 | return (level_current < max) ? min_above : max; | |
1282 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1283 | return (level_current > min) ? max_below : min; | |
1284 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1285 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1286 | return 0; | |
1287 | default: | |
1288 | return level_current; | |
1289 | } | |
1da177e4 LT |
1290 | } |
1291 | ||
8ab58e8e LT |
1292 | static void |
1293 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1294 | { |
8ab58e8e LT |
1295 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1296 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1297 | unsigned long long level_current, level_next; |
8ab58e8e | 1298 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1299 | int result = -EINVAL; |
1300 | ||
fbc9fe1b | 1301 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
654a182d | 1302 | if (!device->backlight) |
8ab58e8e | 1303 | return; |
28c32e99 | 1304 | |
469778c1 | 1305 | if (!device->brightness) |
c8890f90 ZR |
1306 | goto out; |
1307 | ||
1308 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1309 | &level_current, |
1310 | false); | |
c8890f90 ZR |
1311 | if (result) |
1312 | goto out; | |
1313 | ||
1da177e4 | 1314 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1315 | |
24450c7a | 1316 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1317 | |
36342742 MG |
1318 | if (!result) |
1319 | backlight_force_update(device->backlight, | |
1320 | BACKLIGHT_UPDATE_HOTKEY); | |
1321 | ||
c8890f90 ZR |
1322 | out: |
1323 | if (result) | |
1324 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1325 | } |
1326 | ||
e92a7162 MG |
1327 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1328 | void **edid) | |
1329 | { | |
1330 | struct acpi_video_bus *video; | |
1331 | struct acpi_video_device *video_device; | |
1332 | union acpi_object *buffer = NULL; | |
1333 | acpi_status status; | |
1334 | int i, length; | |
1335 | ||
1336 | if (!device || !acpi_driver_data(device)) | |
1337 | return -EINVAL; | |
1338 | ||
1339 | video = acpi_driver_data(device); | |
1340 | ||
1341 | for (i = 0; i < video->attached_count; i++) { | |
1342 | video_device = video->attached_array[i].bind_info; | |
1343 | length = 256; | |
1344 | ||
1345 | if (!video_device) | |
1346 | continue; | |
1347 | ||
82069552 ZR |
1348 | if (!video_device->cap._DDC) |
1349 | continue; | |
1350 | ||
e92a7162 MG |
1351 | if (type) { |
1352 | switch (type) { | |
1353 | case ACPI_VIDEO_DISPLAY_CRT: | |
1354 | if (!video_device->flags.crt) | |
1355 | continue; | |
1356 | break; | |
1357 | case ACPI_VIDEO_DISPLAY_TV: | |
1358 | if (!video_device->flags.tvout) | |
1359 | continue; | |
1360 | break; | |
1361 | case ACPI_VIDEO_DISPLAY_DVI: | |
1362 | if (!video_device->flags.dvi) | |
1363 | continue; | |
1364 | break; | |
1365 | case ACPI_VIDEO_DISPLAY_LCD: | |
1366 | if (!video_device->flags.lcd) | |
1367 | continue; | |
1368 | break; | |
1369 | } | |
1370 | } else if (video_device->device_id != device_id) { | |
1371 | continue; | |
1372 | } | |
1373 | ||
1374 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1375 | ||
1376 | if (ACPI_FAILURE(status) || !buffer || | |
1377 | buffer->type != ACPI_TYPE_BUFFER) { | |
1378 | length = 128; | |
1379 | status = acpi_video_device_EDID(video_device, &buffer, | |
1380 | length); | |
1381 | if (ACPI_FAILURE(status) || !buffer || | |
1382 | buffer->type != ACPI_TYPE_BUFFER) { | |
1383 | continue; | |
1384 | } | |
1385 | } | |
1386 | ||
1387 | *edid = buffer->buffer.pointer; | |
1388 | return length; | |
1389 | } | |
1390 | ||
1391 | return -ENODEV; | |
1392 | } | |
1393 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1394 | ||
1da177e4 | 1395 | static int |
4be44fcd LB |
1396 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1397 | struct acpi_device *device) | |
1da177e4 | 1398 | { |
fba4e087 | 1399 | int status = 0; |
ff102ea9 | 1400 | struct acpi_device *dev; |
1da177e4 | 1401 | |
fba4e087 IM |
1402 | /* |
1403 | * There are systems where video module known to work fine regardless | |
1404 | * of broken _DOD and ignoring returned value here doesn't cause | |
1405 | * any issues later. | |
1406 | */ | |
1407 | acpi_video_device_enumerate(video); | |
1da177e4 | 1408 | |
ff102ea9 | 1409 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1410 | |
1411 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1412 | if (status) { |
91e13aa3 AL |
1413 | dev_err(&dev->dev, "Can't attach device\n"); |
1414 | break; | |
1da177e4 | 1415 | } |
b4df4636 | 1416 | video->child_count++; |
1da177e4 | 1417 | } |
d550d98d | 1418 | return status; |
1da177e4 LT |
1419 | } |
1420 | ||
1da177e4 LT |
1421 | /* acpi_video interface */ |
1422 | ||
efaa14c7 AL |
1423 | /* |
1424 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1425 | * preform any automatic brightness change on receiving a notification. | |
1426 | */ | |
4be44fcd | 1427 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1428 | { |
efaa14c7 | 1429 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1430 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1431 | } |
1432 | ||
4be44fcd | 1433 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1434 | { |
efaa14c7 | 1435 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1436 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1437 | } |
1438 | ||
7015558f | 1439 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1440 | { |
7015558f | 1441 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1442 | struct input_dev *input; |
17c452f9 | 1443 | int keycode = 0; |
e9dab196 | 1444 | |
67b662e1 | 1445 | if (!video || !video->input) |
d550d98d | 1446 | return; |
1da177e4 | 1447 | |
e9dab196 | 1448 | input = video->input; |
1da177e4 LT |
1449 | |
1450 | switch (event) { | |
98fb8fe1 | 1451 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1452 | * most likely via hotkey. */ |
8a37c65d | 1453 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1454 | break; |
1455 | ||
98fb8fe1 | 1456 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1457 | * connector. */ |
1458 | acpi_video_device_enumerate(video); | |
1459 | acpi_video_device_rebind(video); | |
e9dab196 | 1460 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1461 | break; |
1462 | ||
4be44fcd | 1463 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1464 | keycode = KEY_SWITCHVIDEOMODE; |
1465 | break; | |
4be44fcd | 1466 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1467 | keycode = KEY_VIDEO_NEXT; |
1468 | break; | |
4be44fcd | 1469 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1470 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1471 | break; |
1472 | ||
1473 | default: | |
1474 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1475 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1476 | break; |
1477 | } | |
1478 | ||
8a37c65d LT |
1479 | if (acpi_notifier_call_chain(device, event, 0)) |
1480 | /* Something vetoed the keypress. */ | |
1481 | keycode = 0; | |
17c452f9 MG |
1482 | |
1483 | if (keycode) { | |
1484 | input_report_key(input, keycode, 1); | |
1485 | input_sync(input); | |
1486 | input_report_key(input, keycode, 0); | |
1487 | input_sync(input); | |
1488 | } | |
e9dab196 | 1489 | |
d550d98d | 1490 | return; |
1da177e4 LT |
1491 | } |
1492 | ||
8ab58e8e LT |
1493 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1494 | u32 event) | |
1495 | { | |
1496 | if (!brightness_switch_enabled) | |
1497 | return; | |
1498 | ||
1499 | video_device->switch_brightness_event = event; | |
1500 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1501 | } | |
1502 | ||
4be44fcd | 1503 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1504 | { |
50dd0969 | 1505 | struct acpi_video_device *video_device = data; |
4be44fcd | 1506 | struct acpi_device *device = NULL; |
e9dab196 LY |
1507 | struct acpi_video_bus *bus; |
1508 | struct input_dev *input; | |
17c452f9 | 1509 | int keycode = 0; |
1da177e4 | 1510 | |
1da177e4 | 1511 | if (!video_device) |
d550d98d | 1512 | return; |
1da177e4 | 1513 | |
e6afa0de | 1514 | device = video_device->dev; |
e9dab196 LY |
1515 | bus = video_device->video; |
1516 | input = bus->input; | |
1da177e4 LT |
1517 | |
1518 | switch (event) { | |
4be44fcd | 1519 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1520 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1521 | keycode = KEY_BRIGHTNESS_CYCLE; |
1522 | break; | |
4be44fcd | 1523 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1524 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1525 | keycode = KEY_BRIGHTNESSUP; |
1526 | break; | |
4be44fcd | 1527 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1528 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1529 | keycode = KEY_BRIGHTNESSDOWN; |
1530 | break; | |
70f23fd6 | 1531 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1532 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1533 | keycode = KEY_BRIGHTNESS_ZERO; |
1534 | break; | |
4be44fcd | 1535 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1536 | brightness_switch_event(video_device, event); |
e9dab196 | 1537 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1538 | break; |
1539 | default: | |
1540 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1541 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1542 | break; |
1543 | } | |
e9dab196 | 1544 | |
7761f638 | 1545 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1546 | |
1547 | if (keycode) { | |
1548 | input_report_key(input, keycode, 1); | |
1549 | input_sync(input); | |
1550 | input_report_key(input, keycode, 0); | |
1551 | input_sync(input); | |
1552 | } | |
e9dab196 | 1553 | |
d550d98d | 1554 | return; |
1da177e4 LT |
1555 | } |
1556 | ||
ac7729da RW |
1557 | static int acpi_video_resume(struct notifier_block *nb, |
1558 | unsigned long val, void *ign) | |
863c1490 MG |
1559 | { |
1560 | struct acpi_video_bus *video; | |
1561 | struct acpi_video_device *video_device; | |
1562 | int i; | |
1563 | ||
ac7729da RW |
1564 | switch (val) { |
1565 | case PM_HIBERNATION_PREPARE: | |
1566 | case PM_SUSPEND_PREPARE: | |
1567 | case PM_RESTORE_PREPARE: | |
1568 | return NOTIFY_DONE; | |
1569 | } | |
863c1490 | 1570 | |
ac7729da RW |
1571 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1572 | ||
1573 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1574 | |
1575 | for (i = 0; i < video->attached_count; i++) { | |
1576 | video_device = video->attached_array[i].bind_info; | |
654a182d HG |
1577 | if (video_device && video_device->brightness) |
1578 | acpi_video_device_lcd_set_level(video_device, | |
1579 | video_device->brightness->curr); | |
863c1490 | 1580 | } |
ac7729da RW |
1581 | |
1582 | return NOTIFY_OK; | |
863c1490 MG |
1583 | } |
1584 | ||
c504f8cb ZR |
1585 | static acpi_status |
1586 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1587 | void **return_value) | |
1588 | { | |
1589 | struct acpi_device *device = context; | |
1590 | struct acpi_device *sibling; | |
1591 | int result; | |
1592 | ||
1593 | if (handle == device->handle) | |
1594 | return AE_CTRL_TERMINATE; | |
1595 | ||
1596 | result = acpi_bus_get_device(handle, &sibling); | |
1597 | if (result) | |
1598 | return AE_OK; | |
1599 | ||
1600 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1601 | return AE_ALREADY_EXISTS; | |
1602 | ||
1603 | return AE_OK; | |
1604 | } | |
1605 | ||
67b662e1 AL |
1606 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1607 | { | |
99678ed7 HG |
1608 | struct backlight_properties props; |
1609 | struct pci_dev *pdev; | |
1610 | acpi_handle acpi_parent; | |
1611 | struct device *parent = NULL; | |
1612 | int result; | |
1613 | static int count; | |
1614 | char *name; | |
67b662e1 | 1615 | |
99678ed7 HG |
1616 | result = acpi_video_init_brightness(device); |
1617 | if (result) | |
1618 | return; | |
654a182d HG |
1619 | |
1620 | if (disable_backlight_sysfs_if > 0) | |
1621 | return; | |
1622 | ||
99678ed7 HG |
1623 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
1624 | if (!name) | |
1625 | return; | |
1626 | count++; | |
67b662e1 | 1627 | |
99678ed7 | 1628 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1629 | |
99678ed7 HG |
1630 | pdev = acpi_get_pci_dev(acpi_parent); |
1631 | if (pdev) { | |
1632 | parent = &pdev->dev; | |
1633 | pci_dev_put(pdev); | |
1634 | } | |
67b662e1 | 1635 | |
99678ed7 HG |
1636 | memset(&props, 0, sizeof(struct backlight_properties)); |
1637 | props.type = BACKLIGHT_FIRMWARE; | |
1638 | props.max_brightness = device->brightness->count - 3; | |
1639 | device->backlight = backlight_device_register(name, | |
1640 | parent, | |
1641 | device, | |
1642 | &acpi_backlight_ops, | |
1643 | &props); | |
1644 | kfree(name); | |
654a182d HG |
1645 | if (IS_ERR(device->backlight)) { |
1646 | device->backlight = NULL; | |
99678ed7 | 1647 | return; |
654a182d | 1648 | } |
67b662e1 | 1649 | |
99678ed7 HG |
1650 | /* |
1651 | * Save current brightness level in case we have to restore it | |
1652 | * before acpi_video_device_lcd_set_level() is called next time. | |
1653 | */ | |
1654 | device->backlight->props.brightness = | |
1655 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1656 | |
99678ed7 HG |
1657 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1658 | device->dev, &video_cooling_ops); | |
1659 | if (IS_ERR(device->cooling_dev)) { | |
1660 | /* | |
1661 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1662 | * Also, why the hell we are returning early and not attempt to | |
1663 | * register video output if cooling device registration failed? | |
1664 | * -- dtor | |
1665 | */ | |
1666 | device->cooling_dev = NULL; | |
1667 | return; | |
67b662e1 | 1668 | } |
99678ed7 HG |
1669 | |
1670 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1671 | device->cooling_dev->id); | |
1672 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1673 | &device->cooling_dev->device.kobj, | |
1674 | "thermal_cooling"); | |
1675 | if (result) | |
1676 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1677 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1678 | &device->dev->dev.kobj, "device"); | |
1679 | if (result) | |
1680 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1681 | } |
1682 | ||
dce4ec2e AL |
1683 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1684 | { | |
1685 | struct acpi_video_device *dev; | |
1686 | union acpi_object *levels; | |
1687 | ||
1688 | mutex_lock(&video->device_list_lock); | |
1689 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
1690 | if (!acpi_video_device_lcd_query_levels(dev, &levels)) | |
1691 | kfree(levels); | |
1692 | } | |
1693 | mutex_unlock(&video->device_list_lock); | |
1694 | } | |
1695 | ||
e50b9be1 AL |
1696 | static bool acpi_video_should_register_backlight(struct acpi_video_device *dev) |
1697 | { | |
1698 | /* | |
1699 | * Do not create backlight device for video output | |
1700 | * device that is not in the enumerated list. | |
1701 | */ | |
1702 | if (!acpi_video_device_in_dod(dev)) { | |
1703 | dev_dbg(&dev->dev->dev, "not in _DOD list, ignore\n"); | |
1704 | return false; | |
1705 | } | |
1706 | ||
1707 | if (only_lcd) | |
1708 | return dev->flags.lcd; | |
1709 | return true; | |
1710 | } | |
1711 | ||
67b662e1 AL |
1712 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1713 | { | |
1714 | struct acpi_video_device *dev; | |
1715 | ||
53a92ba7 HG |
1716 | if (video->backlight_registered) |
1717 | return 0; | |
1718 | ||
dce4ec2e AL |
1719 | acpi_video_run_bcl_for_osi(video); |
1720 | ||
3bd6bce3 | 1721 | if (acpi_video_get_backlight_type() != acpi_backlight_video) |
99678ed7 HG |
1722 | return 0; |
1723 | ||
67b662e1 | 1724 | mutex_lock(&video->device_list_lock); |
e50b9be1 AL |
1725 | list_for_each_entry(dev, &video->video_device_list, entry) { |
1726 | if (acpi_video_should_register_backlight(dev)) | |
1727 | acpi_video_dev_register_backlight(dev); | |
1728 | } | |
67b662e1 AL |
1729 | mutex_unlock(&video->device_list_lock); |
1730 | ||
99678ed7 HG |
1731 | video->backlight_registered = true; |
1732 | ||
67b662e1 AL |
1733 | video->pm_nb.notifier_call = acpi_video_resume; |
1734 | video->pm_nb.priority = 0; | |
1735 | return register_pm_notifier(&video->pm_nb); | |
1736 | } | |
1737 | ||
1738 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1739 | { | |
1740 | if (device->backlight) { | |
1741 | backlight_device_unregister(device->backlight); | |
1742 | device->backlight = NULL; | |
1743 | } | |
1744 | if (device->brightness) { | |
1745 | kfree(device->brightness->levels); | |
1746 | kfree(device->brightness); | |
1747 | device->brightness = NULL; | |
1748 | } | |
1749 | if (device->cooling_dev) { | |
1750 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1751 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1752 | thermal_cooling_device_unregister(device->cooling_dev); | |
1753 | device->cooling_dev = NULL; | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1758 | { | |
1759 | struct acpi_video_device *dev; | |
99678ed7 HG |
1760 | int error; |
1761 | ||
1762 | if (!video->backlight_registered) | |
1763 | return 0; | |
1764 | ||
1765 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1766 | |
1767 | mutex_lock(&video->device_list_lock); | |
1768 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1769 | acpi_video_dev_unregister_backlight(dev); | |
1770 | mutex_unlock(&video->device_list_lock); | |
1771 | ||
99678ed7 HG |
1772 | video->backlight_registered = false; |
1773 | ||
67b662e1 AL |
1774 | return error; |
1775 | } | |
1776 | ||
1777 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1778 | { | |
1779 | acpi_status status; | |
1780 | struct acpi_device *adev = device->dev; | |
1781 | ||
1782 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1783 | acpi_video_device_notify, device); | |
1784 | if (ACPI_FAILURE(status)) | |
1785 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1786 | else | |
1787 | device->flags.notify = 1; | |
1788 | } | |
1789 | ||
1790 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1791 | { | |
1792 | struct input_dev *input; | |
1793 | struct acpi_video_device *dev; | |
1794 | int error; | |
1795 | ||
1796 | video->input = input = input_allocate_device(); | |
1797 | if (!input) { | |
1798 | error = -ENOMEM; | |
1799 | goto out; | |
1800 | } | |
1801 | ||
1802 | error = acpi_video_bus_start_devices(video); | |
1803 | if (error) | |
1804 | goto err_free_input; | |
1805 | ||
1806 | snprintf(video->phys, sizeof(video->phys), | |
1807 | "%s/video/input0", acpi_device_hid(video->device)); | |
1808 | ||
1809 | input->name = acpi_device_name(video->device); | |
1810 | input->phys = video->phys; | |
1811 | input->id.bustype = BUS_HOST; | |
1812 | input->id.product = 0x06; | |
1813 | input->dev.parent = &video->device->dev; | |
1814 | input->evbit[0] = BIT(EV_KEY); | |
1815 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1816 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1817 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1818 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1819 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1820 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1821 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1822 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1823 | ||
1824 | error = input_register_device(input); | |
1825 | if (error) | |
1826 | goto err_stop_dev; | |
1827 | ||
1828 | mutex_lock(&video->device_list_lock); | |
1829 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1830 | acpi_video_dev_add_notify_handler(dev); | |
1831 | mutex_unlock(&video->device_list_lock); | |
1832 | ||
1833 | return 0; | |
1834 | ||
1835 | err_stop_dev: | |
1836 | acpi_video_bus_stop_devices(video); | |
1837 | err_free_input: | |
1838 | input_free_device(input); | |
1839 | video->input = NULL; | |
1840 | out: | |
1841 | return error; | |
1842 | } | |
1843 | ||
1844 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1845 | { | |
1846 | if (dev->flags.notify) { | |
1847 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1848 | acpi_video_device_notify); | |
1849 | dev->flags.notify = 0; | |
1850 | } | |
1851 | } | |
1852 | ||
1853 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1854 | { | |
1855 | struct acpi_video_device *dev; | |
1856 | ||
1857 | mutex_lock(&video->device_list_lock); | |
1858 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1859 | acpi_video_dev_remove_notify_handler(dev); | |
1860 | mutex_unlock(&video->device_list_lock); | |
1861 | ||
1862 | acpi_video_bus_stop_devices(video); | |
1863 | input_unregister_device(video->input); | |
1864 | video->input = NULL; | |
1865 | } | |
1866 | ||
1867 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1868 | { | |
1869 | struct acpi_video_device *dev, *next; | |
1870 | ||
1871 | mutex_lock(&video->device_list_lock); | |
1872 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1873 | list_del(&dev->entry); | |
1874 | kfree(dev); | |
1875 | } | |
1876 | mutex_unlock(&video->device_list_lock); | |
1877 | ||
1878 | return 0; | |
1879 | } | |
1880 | ||
ac7729da RW |
1881 | static int instance; |
1882 | ||
4be44fcd | 1883 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1884 | { |
f51e8391 | 1885 | struct acpi_video_bus *video; |
f51e8391 | 1886 | int error; |
c504f8cb ZR |
1887 | acpi_status status; |
1888 | ||
1889 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1890 | device->parent->handle, 1, | |
1891 | acpi_video_bus_match, NULL, | |
1892 | device, NULL); | |
1893 | if (status == AE_ALREADY_EXISTS) { | |
1894 | printk(KERN_WARNING FW_BUG | |
1895 | "Duplicate ACPI video bus devices for the" | |
1896 | " same VGA controller, please try module " | |
1897 | "parameter \"video.allow_duplicates=1\"" | |
1898 | "if the current driver doesn't work.\n"); | |
1899 | if (!allow_duplicates) | |
1900 | return -ENODEV; | |
1901 | } | |
1da177e4 | 1902 | |
36bcbec7 | 1903 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1904 | if (!video) |
d550d98d | 1905 | return -ENOMEM; |
1da177e4 | 1906 | |
e6d9da1d ZR |
1907 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1908 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1909 | if (instance) | |
1910 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1911 | instance++; |
e6d9da1d | 1912 | } |
f3b39f13 ZY |
1913 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1914 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1915 | if (instance) | |
1916 | device->pnp.bus_id[3] = '0' + instance; | |
1917 | instance++; | |
1918 | } | |
e6d9da1d | 1919 | |
e6afa0de | 1920 | video->device = device; |
1da177e4 LT |
1921 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1922 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1923 | device->driver_data = video; |
1da177e4 LT |
1924 | |
1925 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1926 | error = acpi_video_bus_check(video); |
1927 | if (error) | |
1928 | goto err_free_video; | |
1da177e4 | 1929 | |
bbac81f5 | 1930 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1931 | INIT_LIST_HEAD(&video->video_device_list); |
1932 | ||
ea9f8856 IM |
1933 | error = acpi_video_bus_get_devices(video, device); |
1934 | if (error) | |
91e13aa3 | 1935 | goto err_put_video; |
1da177e4 | 1936 | |
1da177e4 | 1937 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1938 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1939 | video->flags.multihead ? "yes" : "no", | |
1940 | video->flags.rom ? "yes" : "no", | |
1941 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1942 | mutex_lock(&video_list_lock); |
1943 | list_add_tail(&video->entry, &video_bus_head); | |
1944 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1945 | |
67b662e1 AL |
1946 | acpi_video_bus_register_backlight(video); |
1947 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1948 | |
f51e8391 DT |
1949 | return 0; |
1950 | ||
67b662e1 | 1951 | err_put_video: |
f51e8391 DT |
1952 | acpi_video_bus_put_devices(video); |
1953 | kfree(video->attached_array); | |
67b662e1 | 1954 | err_free_video: |
f51e8391 | 1955 | kfree(video); |
db89b4f0 | 1956 | device->driver_data = NULL; |
1da177e4 | 1957 | |
f51e8391 | 1958 | return error; |
1da177e4 LT |
1959 | } |
1960 | ||
51fac838 | 1961 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1962 | { |
4be44fcd | 1963 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1964 | |
1da177e4 LT |
1965 | |
1966 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1967 | return -EINVAL; |
1da177e4 | 1968 | |
50dd0969 | 1969 | video = acpi_driver_data(device); |
1da177e4 | 1970 | |
67b662e1 AL |
1971 | acpi_video_bus_remove_notify_handler(video); |
1972 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1973 | acpi_video_bus_put_devices(video); |
1da177e4 | 1974 | |
67b662e1 AL |
1975 | mutex_lock(&video_list_lock); |
1976 | list_del(&video->entry); | |
1977 | mutex_unlock(&video_list_lock); | |
1978 | ||
6044ec88 | 1979 | kfree(video->attached_array); |
1da177e4 LT |
1980 | kfree(video); |
1981 | ||
d550d98d | 1982 | return 0; |
1da177e4 LT |
1983 | } |
1984 | ||
c6996bdd AC |
1985 | static int __init is_i740(struct pci_dev *dev) |
1986 | { | |
1987 | if (dev->device == 0x00D1) | |
1988 | return 1; | |
1989 | if (dev->device == 0x7000) | |
1990 | return 1; | |
1991 | return 0; | |
1992 | } | |
1993 | ||
74a365b3 MG |
1994 | static int __init intel_opregion_present(void) |
1995 | { | |
c6996bdd | 1996 | int opregion = 0; |
74a365b3 MG |
1997 | struct pci_dev *dev = NULL; |
1998 | u32 address; | |
1999 | ||
2000 | for_each_pci_dev(dev) { | |
2001 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2002 | continue; | |
2003 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2004 | continue; | |
c6996bdd AC |
2005 | /* We don't want to poke around undefined i740 registers */ |
2006 | if (is_i740(dev)) | |
2007 | continue; | |
74a365b3 MG |
2008 | pci_read_config_dword(dev, 0xfc, &address); |
2009 | if (!address) | |
2010 | continue; | |
c6996bdd | 2011 | opregion = 1; |
74a365b3 | 2012 | } |
c6996bdd | 2013 | return opregion; |
74a365b3 MG |
2014 | } |
2015 | ||
8e5c2b77 | 2016 | int acpi_video_register(void) |
1da177e4 | 2017 | { |
2a8b18e9 | 2018 | int ret = 0; |
28d63403 | 2019 | |
2a8b18e9 | 2020 | mutex_lock(®ister_count_mutex); |
86e437f0 ZY |
2021 | if (register_count) { |
2022 | /* | |
8e5c2b77 RW |
2023 | * if the function of acpi_video_register is already called, |
2024 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 | 2025 | */ |
2a8b18e9 | 2026 | goto leave; |
86e437f0 | 2027 | } |
1da177e4 | 2028 | |
67b662e1 AL |
2029 | mutex_init(&video_list_lock); |
2030 | INIT_LIST_HEAD(&video_bus_head); | |
2031 | ||
7ee33baa HG |
2032 | dmi_check_system(video_dmi_table); |
2033 | ||
28d63403 CW |
2034 | ret = acpi_bus_register_driver(&acpi_video_bus); |
2035 | if (ret) | |
2a8b18e9 | 2036 | goto leave; |
1da177e4 | 2037 | |
86e437f0 ZY |
2038 | /* |
2039 | * When the acpi_video_bus is loaded successfully, increase | |
2040 | * the counter reference. | |
2041 | */ | |
2042 | register_count = 1; | |
2043 | ||
2a8b18e9 HG |
2044 | leave: |
2045 | mutex_unlock(®ister_count_mutex); | |
2046 | return ret; | |
1da177e4 | 2047 | } |
8e5c2b77 | 2048 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2049 | |
86e437f0 ZY |
2050 | void acpi_video_unregister(void) |
2051 | { | |
2a8b18e9 HG |
2052 | mutex_lock(®ister_count_mutex); |
2053 | if (register_count) { | |
2054 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2055 | register_count = 0; | |
86e437f0 | 2056 | } |
2a8b18e9 | 2057 | mutex_unlock(®ister_count_mutex); |
86e437f0 ZY |
2058 | } |
2059 | EXPORT_SYMBOL(acpi_video_unregister); | |
2060 | ||
1b7f37e1 HG |
2061 | void acpi_video_unregister_backlight(void) |
2062 | { | |
2063 | struct acpi_video_bus *video; | |
2064 | ||
2a8b18e9 HG |
2065 | mutex_lock(®ister_count_mutex); |
2066 | if (register_count) { | |
2067 | mutex_lock(&video_list_lock); | |
2068 | list_for_each_entry(video, &video_bus_head, entry) | |
2069 | acpi_video_bus_unregister_backlight(video); | |
2070 | mutex_unlock(&video_list_lock); | |
2071 | } | |
2072 | mutex_unlock(®ister_count_mutex); | |
1b7f37e1 | 2073 | } |
1b7f37e1 | 2074 | |
74a365b3 MG |
2075 | /* |
2076 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2077 | * the video opregion code to be run first in order to initialise | |
2078 | * state before any ACPI video calls are made. To handle this we defer | |
2079 | * registration of the video class until the opregion code has run. | |
2080 | */ | |
2081 | ||
2082 | static int __init acpi_video_init(void) | |
2083 | { | |
6e17cb12 CW |
2084 | /* |
2085 | * Let the module load even if ACPI is disabled (e.g. due to | |
2086 | * a broken BIOS) so that i915.ko can still be loaded on such | |
2087 | * old systems without an AcpiOpRegion. | |
2088 | * | |
2089 | * acpi_video_register() will report -ENODEV later as well due | |
2090 | * to acpi_disabled when i915.ko tries to register itself afterwards. | |
2091 | */ | |
2092 | if (acpi_disabled) | |
2093 | return 0; | |
2094 | ||
74a365b3 MG |
2095 | if (intel_opregion_present()) |
2096 | return 0; | |
2097 | ||
2098 | return acpi_video_register(); | |
2099 | } | |
1da177e4 | 2100 | |
86e437f0 | 2101 | static void __exit acpi_video_exit(void) |
1da177e4 | 2102 | { |
93a291df | 2103 | acpi_video_detect_exit(); |
86e437f0 | 2104 | acpi_video_unregister(); |
1da177e4 | 2105 | |
d550d98d | 2106 | return; |
1da177e4 LT |
2107 | } |
2108 | ||
2109 | module_init(acpi_video_init); | |
2110 | module_exit(acpi_video_exit); |