Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/list.h> | |
bbac81f5 | 32 | #include <linux/mutex.h> |
e9dab196 | 33 | #include <linux/input.h> |
2f3d000a | 34 | #include <linux/backlight.h> |
702ed512 | 35 | #include <linux/thermal.h> |
935e5f29 | 36 | #include <linux/sort.h> |
74a365b3 MG |
37 | #include <linux/pci.h> |
38 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
eb27cae8 | 40 | #include <linux/dmi.h> |
ac7729da | 41 | #include <linux/suspend.h> |
8b48463f | 42 | #include <linux/acpi.h> |
e92a7162 | 43 | #include <acpi/video.h> |
8b48463f | 44 | #include <asm/uaccess.h> |
1da177e4 | 45 | |
8c5bd7ad RW |
46 | #include "internal.h" |
47 | ||
1da177e4 LT |
48 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
49 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
50 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
51 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
52 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
53 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
54 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
55 | ||
f4715189 TT |
56 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
57 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
58 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
59 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
60 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 61 | |
2f3d000a | 62 | #define MAX_NAME_LEN 20 |
1da177e4 | 63 | |
1da177e4 | 64 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 65 | ACPI_MODULE_NAME("video"); |
1da177e4 | 66 | |
f52fd66d | 67 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 68 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
69 | MODULE_LICENSE("GPL"); |
70 | ||
2843768b | 71 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
72 | module_param(brightness_switch_enabled, bool, 0644); |
73 | ||
c504f8cb ZR |
74 | /* |
75 | * By default, we don't allow duplicate ACPI video bus devices | |
76 | * under the same VGA controller | |
77 | */ | |
90ab5ee9 | 78 | static bool allow_duplicates; |
c504f8cb ZR |
79 | module_param(allow_duplicates, bool, 0644); |
80 | ||
fbc9fe1b | 81 | /* |
0e9f81d3 AL |
82 | * For Windows 8 systems: used to decide if video module |
83 | * should skip registering backlight interface of its own. | |
fbc9fe1b | 84 | */ |
ff92cfe7 AL |
85 | enum { |
86 | NATIVE_BACKLIGHT_NOT_SET = -1, | |
87 | NATIVE_BACKLIGHT_OFF, | |
88 | NATIVE_BACKLIGHT_ON, | |
89 | }; | |
90 | ||
91 | static int use_native_backlight_param = NATIVE_BACKLIGHT_NOT_SET; | |
0e9f81d3 | 92 | module_param_named(use_native_backlight, use_native_backlight_param, int, 0444); |
ff92cfe7 | 93 | static int use_native_backlight_dmi = NATIVE_BACKLIGHT_NOT_SET; |
fbc9fe1b | 94 | |
915ea7e4 | 95 | static int register_count; |
67b662e1 AL |
96 | static struct mutex video_list_lock; |
97 | static struct list_head video_bus_head; | |
4be44fcd | 98 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 99 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 100 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 101 | |
1ba90e3a TR |
102 | static const struct acpi_device_id video_device_ids[] = { |
103 | {ACPI_VIDEO_HID, 0}, | |
104 | {"", 0}, | |
105 | }; | |
106 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
107 | ||
1da177e4 | 108 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 109 | .name = "video", |
1da177e4 | 110 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 111 | .ids = video_device_ids, |
1da177e4 LT |
112 | .ops = { |
113 | .add = acpi_video_bus_add, | |
114 | .remove = acpi_video_bus_remove, | |
7015558f | 115 | .notify = acpi_video_bus_notify, |
4be44fcd | 116 | }, |
1da177e4 LT |
117 | }; |
118 | ||
119 | struct acpi_video_bus_flags { | |
4be44fcd LB |
120 | u8 multihead:1; /* can switch video heads */ |
121 | u8 rom:1; /* can retrieve a video rom */ | |
122 | u8 post:1; /* can configure the head to */ | |
123 | u8 reserved:5; | |
1da177e4 LT |
124 | }; |
125 | ||
126 | struct acpi_video_bus_cap { | |
21fcb34e FC |
127 | u8 _DOS:1; /* Enable/Disable output switching */ |
128 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
129 | u8 _ROM:1; /* Get ROM Data */ | |
130 | u8 _GPD:1; /* Get POST Device */ | |
131 | u8 _SPD:1; /* Set POST Device */ | |
132 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 133 | u8 reserved:2; |
1da177e4 LT |
134 | }; |
135 | ||
4be44fcd LB |
136 | struct acpi_video_device_attrib { |
137 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
138 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
139 | u32 display_type:4; /* Describe the specific type in use */ | |
140 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
141 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
142 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 143 | the VGA device. */ |
21fcb34e FC |
144 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
145 | u32 reserved:10; /* Must be 0 */ | |
146 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct acpi_video_enumerated_device { | |
150 | union { | |
151 | u32 int_val; | |
4be44fcd | 152 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
153 | } value; |
154 | struct acpi_video_device *bind_info; | |
155 | }; | |
156 | ||
157 | struct acpi_video_bus { | |
e6afa0de | 158 | struct acpi_device *device; |
99678ed7 | 159 | bool backlight_registered; |
53a92ba7 | 160 | bool backlight_notifier_registered; |
4be44fcd | 161 | u8 dos_setting; |
1da177e4 | 162 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd | 163 | u8 attached_count; |
b4df4636 | 164 | u8 child_count; |
4be44fcd | 165 | struct acpi_video_bus_cap cap; |
1da177e4 | 166 | struct acpi_video_bus_flags flags; |
4be44fcd | 167 | struct list_head video_device_list; |
bbac81f5 | 168 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 169 | struct list_head entry; |
e9dab196 LY |
170 | struct input_dev *input; |
171 | char phys[32]; /* for input device */ | |
ac7729da | 172 | struct notifier_block pm_nb; |
53a92ba7 | 173 | struct notifier_block backlight_nb; |
1da177e4 LT |
174 | }; |
175 | ||
176 | struct acpi_video_device_flags { | |
4be44fcd LB |
177 | u8 crt:1; |
178 | u8 lcd:1; | |
179 | u8 tvout:1; | |
82cae999 | 180 | u8 dvi:1; |
4be44fcd LB |
181 | u8 bios:1; |
182 | u8 unknown:1; | |
91e13aa3 AL |
183 | u8 notify:1; |
184 | u8 reserved:1; | |
1da177e4 LT |
185 | }; |
186 | ||
187 | struct acpi_video_device_cap { | |
21fcb34e FC |
188 | u8 _ADR:1; /* Return the unique ID */ |
189 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
190 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 191 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 192 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 193 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
194 | }; |
195 | ||
d32f6947 ZR |
196 | struct acpi_video_brightness_flags { |
197 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 198 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 199 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
200 | }; |
201 | ||
1da177e4 | 202 | struct acpi_video_device_brightness { |
4be44fcd LB |
203 | int curr; |
204 | int count; | |
205 | int *levels; | |
d32f6947 | 206 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
207 | }; |
208 | ||
209 | struct acpi_video_device { | |
4be44fcd LB |
210 | unsigned long device_id; |
211 | struct acpi_video_device_flags flags; | |
212 | struct acpi_video_device_cap cap; | |
213 | struct list_head entry; | |
8ab58e8e LT |
214 | struct delayed_work switch_brightness_work; |
215 | int switch_brightness_event; | |
4be44fcd LB |
216 | struct acpi_video_bus *video; |
217 | struct acpi_device *dev; | |
1da177e4 | 218 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 219 | struct backlight_device *backlight; |
4a703a8f | 220 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
221 | }; |
222 | ||
b7171ae7 | 223 | static const char device_decode[][30] = { |
1da177e4 LT |
224 | "motherboard VGA device", |
225 | "PCI VGA device", | |
226 | "AGP VGA device", | |
227 | "UNKNOWN", | |
228 | }; | |
229 | ||
4be44fcd LB |
230 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
231 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
232 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
233 | struct acpi_video_device *device); | |
1da177e4 | 234 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
235 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
236 | int level); | |
237 | static int acpi_video_device_lcd_get_level_current( | |
238 | struct acpi_video_device *device, | |
a89803df | 239 | unsigned long long *level, bool raw); |
4be44fcd LB |
240 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
241 | u32 level_current, u32 event); | |
8ab58e8e | 242 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 243 | |
0e9f81d3 AL |
244 | static bool acpi_video_use_native_backlight(void) |
245 | { | |
ff92cfe7 | 246 | if (use_native_backlight_param != NATIVE_BACKLIGHT_NOT_SET) |
0e9f81d3 | 247 | return use_native_backlight_param; |
ff92cfe7 | 248 | else if (use_native_backlight_dmi != NATIVE_BACKLIGHT_NOT_SET) |
0e9f81d3 | 249 | return use_native_backlight_dmi; |
ff92cfe7 | 250 | return acpi_osi_is_win8(); |
0e9f81d3 AL |
251 | } |
252 | ||
0b9f7d93 | 253 | bool acpi_video_verify_backlight_support(void) |
fbc9fe1b | 254 | { |
ff92cfe7 | 255 | if (acpi_video_use_native_backlight() && |
fbc9fe1b AL |
256 | backlight_device_registered(BACKLIGHT_RAW)) |
257 | return false; | |
258 | return acpi_video_backlight_support(); | |
259 | } | |
0b9f7d93 | 260 | EXPORT_SYMBOL_GPL(acpi_video_verify_backlight_support); |
fbc9fe1b | 261 | |
21fcb34e | 262 | /* backlight device sysfs support */ |
2f3d000a YL |
263 | static int acpi_video_get_brightness(struct backlight_device *bd) |
264 | { | |
27663c58 | 265 | unsigned long long cur_level; |
38531e6f | 266 | int i; |
7c364e79 | 267 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 268 | |
a89803df | 269 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 270 | return -EINVAL; |
38531e6f MG |
271 | for (i = 2; i < vd->brightness->count; i++) { |
272 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
273 | /* |
274 | * The first two entries are special - see page 575 | |
275 | * of the ACPI spec 3.0 | |
276 | */ | |
915ea7e4 | 277 | return i - 2; |
38531e6f MG |
278 | } |
279 | return 0; | |
2f3d000a YL |
280 | } |
281 | ||
282 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
283 | { | |
24450c7a | 284 | int request_level = bd->props.brightness + 2; |
7c364e79 | 285 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 286 | |
8ab58e8e | 287 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
288 | return acpi_video_device_lcd_set_level(vd, |
289 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
290 | } |
291 | ||
acc2472e | 292 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
293 | .get_brightness = acpi_video_get_brightness, |
294 | .update_status = acpi_video_set_brightness, | |
295 | }; | |
296 | ||
702ed512 | 297 | /* thermal cooling device callbacks */ |
4a703a8f | 298 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 299 | long *state) |
702ed512 | 300 | { |
4a703a8f | 301 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
302 | struct acpi_video_device *video = acpi_driver_data(device); |
303 | ||
6503e5df MG |
304 | *state = video->brightness->count - 3; |
305 | return 0; | |
702ed512 ZR |
306 | } |
307 | ||
4a703a8f | 308 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 309 | long *state) |
702ed512 | 310 | { |
4a703a8f | 311 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 312 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 313 | unsigned long long level; |
6503e5df | 314 | int offset; |
702ed512 | 315 | |
a89803df | 316 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 317 | return -EINVAL; |
6503e5df MG |
318 | for (offset = 2; offset < video->brightness->count; offset++) |
319 | if (level == video->brightness->levels[offset]) { | |
320 | *state = video->brightness->count - offset - 1; | |
321 | return 0; | |
322 | } | |
702ed512 ZR |
323 | |
324 | return -EINVAL; | |
325 | } | |
326 | ||
327 | static int | |
4a703a8f | 328 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 329 | { |
4a703a8f | 330 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
331 | struct acpi_video_device *video = acpi_driver_data(device); |
332 | int level; | |
333 | ||
915ea7e4 | 334 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
335 | return -EINVAL; |
336 | ||
337 | state = video->brightness->count - state; | |
915ea7e4 | 338 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
339 | return acpi_video_device_lcd_set_level(video, level); |
340 | } | |
341 | ||
9c8b04be | 342 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
343 | .get_max_state = video_get_max_state, |
344 | .get_cur_state = video_get_cur_state, | |
345 | .set_cur_state = video_set_cur_state, | |
346 | }; | |
347 | ||
21fcb34e FC |
348 | /* |
349 | * -------------------------------------------------------------------------- | |
350 | * Video Management | |
351 | * -------------------------------------------------------------------------- | |
352 | */ | |
1da177e4 | 353 | |
1da177e4 | 354 | static int |
4be44fcd LB |
355 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
356 | union acpi_object **levels) | |
1da177e4 | 357 | { |
4be44fcd LB |
358 | int status; |
359 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
360 | union acpi_object *obj; | |
1da177e4 | 361 | |
1da177e4 LT |
362 | |
363 | *levels = NULL; | |
364 | ||
90130268 | 365 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 366 | if (!ACPI_SUCCESS(status)) |
d550d98d | 367 | return status; |
4be44fcd | 368 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 369 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 370 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
371 | status = -EFAULT; |
372 | goto err; | |
373 | } | |
374 | ||
375 | *levels = obj; | |
376 | ||
d550d98d | 377 | return 0; |
1da177e4 | 378 | |
915ea7e4 | 379 | err: |
6044ec88 | 380 | kfree(buffer.pointer); |
1da177e4 | 381 | |
d550d98d | 382 | return status; |
1da177e4 LT |
383 | } |
384 | ||
385 | static int | |
4be44fcd | 386 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 387 | { |
24450c7a | 388 | int status; |
9e6dada9 | 389 | int state; |
1da177e4 | 390 | |
0db98202 JL |
391 | status = acpi_execute_simple_method(device->dev->handle, |
392 | "_BCM", level); | |
24450c7a ZR |
393 | if (ACPI_FAILURE(status)) { |
394 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
395 | return -EIO; | |
396 | } | |
397 | ||
4500ca8e | 398 | device->brightness->curr = level; |
9e6dada9 | 399 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 400 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
401 | if (device->backlight) |
402 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
403 | return 0; |
404 | } | |
9e6dada9 | 405 | |
24450c7a ZR |
406 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
407 | return -EINVAL; | |
1da177e4 LT |
408 | } |
409 | ||
45cb50e6 ZR |
410 | /* |
411 | * For some buggy _BQC methods, we need to add a constant value to | |
412 | * the _BQC return value to get the actual current brightness level | |
413 | */ | |
414 | ||
415 | static int bqc_offset_aml_bug_workaround; | |
416 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
417 | { | |
418 | bqc_offset_aml_bug_workaround = 9; | |
419 | return 0; | |
420 | } | |
421 | ||
5f24079b HG |
422 | static int __init video_disable_native_backlight(const struct dmi_system_id *d) |
423 | { | |
ff92cfe7 | 424 | use_native_backlight_dmi = NATIVE_BACKLIGHT_OFF; |
5f24079b HG |
425 | return 0; |
426 | } | |
427 | ||
64491882 HG |
428 | static int __init video_enable_native_backlight(const struct dmi_system_id *d) |
429 | { | |
430 | use_native_backlight_dmi = NATIVE_BACKLIGHT_ON; | |
431 | return 0; | |
432 | } | |
433 | ||
45cb50e6 ZR |
434 | static struct dmi_system_id video_dmi_table[] __initdata = { |
435 | /* | |
436 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
437 | */ | |
438 | { | |
439 | .callback = video_set_bqc_offset, | |
440 | .ident = "Acer Aspire 5720", | |
441 | .matches = { | |
442 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
443 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
444 | }, | |
445 | }, | |
5afc4abe LB |
446 | { |
447 | .callback = video_set_bqc_offset, | |
448 | .ident = "Acer Aspire 5710Z", | |
449 | .matches = { | |
450 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
451 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
452 | }, | |
453 | }, | |
34ac272b ZR |
454 | { |
455 | .callback = video_set_bqc_offset, | |
456 | .ident = "eMachines E510", | |
457 | .matches = { | |
458 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
459 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
460 | }, | |
461 | }, | |
93bcece2 ZR |
462 | { |
463 | .callback = video_set_bqc_offset, | |
464 | .ident = "Acer Aspire 5315", | |
465 | .matches = { | |
466 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
467 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
468 | }, | |
469 | }, | |
152a4e63 ZR |
470 | { |
471 | .callback = video_set_bqc_offset, | |
472 | .ident = "Acer Aspire 7720", | |
473 | .matches = { | |
474 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
475 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
476 | }, | |
477 | }, | |
5f24079b HG |
478 | |
479 | /* | |
480 | * These models have a working acpi_video backlight control, and using | |
481 | * native backlight causes a regression where backlight does not work | |
482 | * when userspace is not handling brightness key events. Disable | |
483 | * native_backlight on these to fix this: | |
484 | * https://bugzilla.kernel.org/show_bug.cgi?id=81691 | |
485 | */ | |
486 | { | |
487 | .callback = video_disable_native_backlight, | |
488 | .ident = "ThinkPad T420", | |
489 | .matches = { | |
490 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
491 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"), | |
492 | }, | |
493 | }, | |
494 | { | |
495 | .callback = video_disable_native_backlight, | |
496 | .ident = "ThinkPad T520", | |
497 | .matches = { | |
498 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
499 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"), | |
500 | }, | |
501 | }, | |
789eeea1 AL |
502 | { |
503 | .callback = video_disable_native_backlight, | |
504 | .ident = "ThinkPad X201s", | |
505 | .matches = { | |
506 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
507 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), | |
508 | }, | |
509 | }, | |
84c34858 HG |
510 | |
511 | /* The native backlight controls do not work on some older machines */ | |
512 | { | |
513 | /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */ | |
514 | .callback = video_disable_native_backlight, | |
515 | .ident = "HP ENVY 15 Notebook", | |
516 | .matches = { | |
517 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
518 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"), | |
519 | }, | |
520 | }, | |
7d0b9349 AL |
521 | |
522 | { | |
523 | .callback = video_disable_native_backlight, | |
524 | .ident = "SAMSUNG 870Z5E/880Z5E/680Z5E", | |
525 | .matches = { | |
526 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
527 | DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"), | |
528 | }, | |
529 | }, | |
530 | { | |
531 | .callback = video_disable_native_backlight, | |
532 | .ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V", | |
533 | .matches = { | |
534 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
535 | DMI_MATCH(DMI_PRODUCT_NAME, "370R4E/370R4V/370R5E/3570RE/370R5V"), | |
536 | }, | |
537 | }, | |
e77a1635 HG |
538 | { |
539 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */ | |
540 | .callback = video_disable_native_backlight, | |
541 | .ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV", | |
542 | .matches = { | |
543 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
544 | DMI_MATCH(DMI_PRODUCT_NAME, "3570R/370R/470R/450R/510R/4450RV"), | |
545 | }, | |
546 | }, | |
3295d730 HG |
547 | { |
548 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */ | |
549 | .callback = video_disable_native_backlight, | |
550 | .ident = "SAMSUNG 730U3E/740U3E", | |
551 | .matches = { | |
552 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
553 | DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"), | |
554 | }, | |
555 | }, | |
3120d03c JR |
556 | { |
557 | /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */ | |
558 | .callback = video_disable_native_backlight, | |
559 | .ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D", | |
560 | .matches = { | |
561 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
562 | DMI_MATCH(DMI_PRODUCT_NAME, "900X3C/900X3D/900X3E/900X4C/900X4D"), | |
563 | }, | |
564 | }, | |
6a3ef10b HG |
565 | |
566 | { | |
567 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */ | |
568 | .callback = video_disable_native_backlight, | |
569 | .ident = "Dell XPS15 L521X", | |
570 | .matches = { | |
571 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
572 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), | |
573 | }, | |
574 | }, | |
64491882 HG |
575 | |
576 | /* Non win8 machines which need native backlight nevertheless */ | |
577 | { | |
578 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */ | |
579 | .callback = video_enable_native_backlight, | |
580 | .ident = "Lenovo Ideapad Z570", | |
581 | .matches = { | |
582 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
583 | DMI_MATCH(DMI_PRODUCT_NAME, "102434U"), | |
584 | }, | |
585 | }, | |
45cb50e6 ZR |
586 | {} |
587 | }; | |
588 | ||
994fa63c DB |
589 | static unsigned long long |
590 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
591 | unsigned long long bqc_value) | |
592 | { | |
593 | unsigned long long level; | |
594 | ||
595 | if (device->brightness->flags._BQC_use_index) { | |
596 | /* | |
597 | * _BQC returns an index that doesn't account for | |
598 | * the first 2 items with special meaning, so we need | |
599 | * to compensate for that by offsetting ourselves | |
600 | */ | |
601 | if (device->brightness->flags._BCL_reversed) | |
602 | bqc_value = device->brightness->count - 3 - bqc_value; | |
603 | ||
604 | level = device->brightness->levels[bqc_value + 2]; | |
605 | } else { | |
606 | level = bqc_value; | |
607 | } | |
608 | ||
609 | level += bqc_offset_aml_bug_workaround; | |
610 | ||
611 | return level; | |
612 | } | |
613 | ||
1da177e4 | 614 | static int |
4be44fcd | 615 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 616 | unsigned long long *level, bool raw) |
1da177e4 | 617 | { |
c8890f90 | 618 | acpi_status status = AE_OK; |
4e231fa4 | 619 | int i; |
c8890f90 | 620 | |
c60d638e ZR |
621 | if (device->cap._BQC || device->cap._BCQ) { |
622 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
623 | ||
624 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
625 | NULL, level); |
626 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
627 | if (raw) { |
628 | /* | |
629 | * Caller has indicated he wants the raw | |
630 | * value returned by _BQC, so don't furtherly | |
631 | * mess with the value. | |
632 | */ | |
633 | return 0; | |
634 | } | |
635 | ||
994fa63c | 636 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 637 | |
4e231fa4 VS |
638 | for (i = 2; i < device->brightness->count; i++) |
639 | if (device->brightness->levels[i] == *level) { | |
640 | device->brightness->curr = *level; | |
641 | return 0; | |
915ea7e4 | 642 | } |
a89803df DB |
643 | /* |
644 | * BQC returned an invalid level. | |
645 | * Stop using it. | |
646 | */ | |
647 | ACPI_WARNING((AE_INFO, | |
648 | "%s returned an invalid level", | |
649 | buf)); | |
650 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 651 | } else { |
21fcb34e FC |
652 | /* |
653 | * Fixme: | |
c8890f90 ZR |
654 | * should we return an error or ignore this failure? |
655 | * dev->brightness->curr is a cached value which stores | |
656 | * the correct current backlight level in most cases. | |
657 | * ACPI video backlight still works w/ buggy _BQC. | |
658 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
659 | */ | |
c60d638e ZR |
660 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
661 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
662 | } |
663 | } | |
664 | ||
4500ca8e | 665 | *level = device->brightness->curr; |
c8890f90 | 666 | return 0; |
1da177e4 LT |
667 | } |
668 | ||
669 | static int | |
4be44fcd LB |
670 | acpi_video_device_EDID(struct acpi_video_device *device, |
671 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 672 | { |
4be44fcd LB |
673 | int status; |
674 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
675 | union acpi_object *obj; | |
676 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
677 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 678 | |
1da177e4 LT |
679 | |
680 | *edid = NULL; | |
681 | ||
682 | if (!device) | |
d550d98d | 683 | return -ENODEV; |
1da177e4 LT |
684 | if (length == 128) |
685 | arg0.integer.value = 1; | |
686 | else if (length == 256) | |
687 | arg0.integer.value = 2; | |
688 | else | |
d550d98d | 689 | return -EINVAL; |
1da177e4 | 690 | |
90130268 | 691 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 692 | if (ACPI_FAILURE(status)) |
d550d98d | 693 | return -ENODEV; |
1da177e4 | 694 | |
50dd0969 | 695 | obj = buffer.pointer; |
1da177e4 LT |
696 | |
697 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
698 | *edid = obj; | |
699 | else { | |
6468463a | 700 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
701 | status = -EFAULT; |
702 | kfree(obj); | |
703 | } | |
704 | ||
d550d98d | 705 | return status; |
1da177e4 LT |
706 | } |
707 | ||
1da177e4 LT |
708 | /* bus */ |
709 | ||
1da177e4 LT |
710 | /* |
711 | * Arg: | |
21fcb34e FC |
712 | * video : video bus device pointer |
713 | * bios_flag : | |
1da177e4 LT |
714 | * 0. The system BIOS should NOT automatically switch(toggle) |
715 | * the active display output. | |
716 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 717 | * active display output. No switch event. |
1da177e4 LT |
718 | * 2. The _DGS value should be locked. |
719 | * 3. The system BIOS should not automatically switch (toggle) the | |
720 | * active display output, but instead generate the display switch | |
721 | * event notify code. | |
722 | * lcd_flag : | |
723 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 724 | * of the LCD when the power changes from AC to DC |
21fcb34e | 725 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 726 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 727 | * Return Value: |
ea9f8856 | 728 | * -EINVAL wrong arg. |
1da177e4 LT |
729 | */ |
730 | ||
731 | static int | |
4be44fcd | 732 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 733 | { |
ea9f8856 | 734 | acpi_status status; |
1da177e4 | 735 | |
b0373843 ZR |
736 | if (!video->cap._DOS) |
737 | return 0; | |
1da177e4 | 738 | |
ea9f8856 IM |
739 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
740 | return -EINVAL; | |
0db98202 JL |
741 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
742 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
743 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
744 | if (ACPI_FAILURE(status)) |
745 | return -EIO; | |
1da177e4 | 746 | |
ea9f8856 | 747 | return 0; |
1da177e4 LT |
748 | } |
749 | ||
935e5f29 ZR |
750 | /* |
751 | * Simple comparison function used to sort backlight levels. | |
752 | */ | |
753 | ||
754 | static int | |
755 | acpi_video_cmp_level(const void *a, const void *b) | |
756 | { | |
757 | return *(int *)a - *(int *)b; | |
758 | } | |
759 | ||
a50188da AL |
760 | /* |
761 | * Decides if _BQC/_BCQ for this system is usable | |
762 | * | |
763 | * We do this by changing the level first and then read out the current | |
764 | * brightness level, if the value does not match, find out if it is using | |
765 | * index. If not, clear the _BQC/_BCQ capability. | |
766 | */ | |
767 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
768 | int max_level, int current_level) | |
769 | { | |
770 | struct acpi_video_device_brightness *br = device->brightness; | |
771 | int result; | |
772 | unsigned long long level; | |
773 | int test_level; | |
774 | ||
775 | /* don't mess with existing known broken systems */ | |
776 | if (bqc_offset_aml_bug_workaround) | |
777 | return 0; | |
778 | ||
779 | /* | |
780 | * Some systems always report current brightness level as maximum | |
781 | * through _BQC, we need to test another value for them. | |
782 | */ | |
b3b301c5 | 783 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
784 | |
785 | result = acpi_video_device_lcd_set_level(device, test_level); | |
786 | if (result) | |
787 | return result; | |
788 | ||
789 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
790 | if (result) | |
791 | return result; | |
792 | ||
793 | if (level != test_level) { | |
794 | /* buggy _BQC found, need to find out if it uses index */ | |
795 | if (level < br->count) { | |
796 | if (br->flags._BCL_reversed) | |
797 | level = br->count - 3 - level; | |
798 | if (br->levels[level + 2] == test_level) | |
799 | br->flags._BQC_use_index = 1; | |
800 | } | |
801 | ||
802 | if (!br->flags._BQC_use_index) | |
803 | device->cap._BQC = device->cap._BCQ = 0; | |
804 | } | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | ||
1da177e4 | 810 | /* |
21fcb34e FC |
811 | * Arg: |
812 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
813 | * |
814 | * Return Value: | |
469778c1 JJ |
815 | * Maximum brightness level |
816 | * | |
817 | * Allocate and initialize device->brightness. | |
818 | */ | |
819 | ||
820 | static int | |
821 | acpi_video_init_brightness(struct acpi_video_device *device) | |
822 | { | |
823 | union acpi_object *obj = NULL; | |
d32f6947 | 824 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 825 | unsigned long long level, level_old; |
469778c1 JJ |
826 | union acpi_object *o; |
827 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 828 | int result = -EINVAL; |
bd8ba205 | 829 | u32 value; |
469778c1 JJ |
830 | |
831 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
832 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
833 | "LCD brightness level\n")); | |
834 | goto out; | |
835 | } | |
836 | ||
837 | if (obj->package.count < 2) | |
838 | goto out; | |
839 | ||
840 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
841 | if (!br) { | |
842 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 843 | result = -ENOMEM; |
469778c1 JJ |
844 | goto out; |
845 | } | |
846 | ||
d32f6947 | 847 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 848 | GFP_KERNEL); |
1a7c618a ZR |
849 | if (!br->levels) { |
850 | result = -ENOMEM; | |
469778c1 | 851 | goto out_free; |
1a7c618a | 852 | } |
469778c1 JJ |
853 | |
854 | for (i = 0; i < obj->package.count; i++) { | |
855 | o = (union acpi_object *)&obj->package.elements[i]; | |
856 | if (o->type != ACPI_TYPE_INTEGER) { | |
857 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
858 | continue; | |
859 | } | |
bd8ba205 HG |
860 | value = (u32) o->integer.value; |
861 | /* Skip duplicate entries */ | |
862 | if (count > 2 && br->levels[count - 1] == value) | |
863 | continue; | |
864 | ||
865 | br->levels[count] = value; | |
469778c1 JJ |
866 | |
867 | if (br->levels[count] > max_level) | |
868 | max_level = br->levels[count]; | |
869 | count++; | |
870 | } | |
871 | ||
d32f6947 ZR |
872 | /* |
873 | * some buggy BIOS don't export the levels | |
874 | * when machine is on AC/Battery in _BCL package. | |
875 | * In this case, the first two elements in _BCL packages | |
876 | * are also supported brightness levels that OS should take care of. | |
877 | */ | |
90af2cf6 ZR |
878 | for (i = 2; i < count; i++) { |
879 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 880 | level_ac_battery++; |
90af2cf6 ZR |
881 | if (br->levels[i] == br->levels[1]) |
882 | level_ac_battery++; | |
883 | } | |
d32f6947 ZR |
884 | |
885 | if (level_ac_battery < 2) { | |
886 | level_ac_battery = 2 - level_ac_battery; | |
887 | br->flags._BCL_no_ac_battery_levels = 1; | |
888 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
889 | br->levels[i] = br->levels[i - level_ac_battery]; | |
890 | count += level_ac_battery; | |
891 | } else if (level_ac_battery > 2) | |
bf6787eb | 892 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 893 | |
d80fb99f ZR |
894 | /* Check if the _BCL package is in a reversed order */ |
895 | if (max_level == br->levels[2]) { | |
896 | br->flags._BCL_reversed = 1; | |
897 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
898 | acpi_video_cmp_level, NULL); | |
899 | } else if (max_level != br->levels[count - 1]) | |
900 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 901 | "Found unordered _BCL package")); |
469778c1 JJ |
902 | |
903 | br->count = count; | |
904 | device->brightness = br; | |
1a7c618a | 905 | |
1a7c618a | 906 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 907 | br->curr = level = max_level; |
e047cca6 ZR |
908 | |
909 | if (!device->cap._BQC) | |
910 | goto set_level; | |
911 | ||
a89803df DB |
912 | result = acpi_video_device_lcd_get_level_current(device, |
913 | &level_old, true); | |
1a7c618a ZR |
914 | if (result) |
915 | goto out_free_levels; | |
916 | ||
a50188da | 917 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
918 | if (result) |
919 | goto out_free_levels; | |
a50188da AL |
920 | /* |
921 | * cap._BQC may get cleared due to _BQC is found to be broken | |
922 | * in acpi_video_bqc_quirk, so check again here. | |
923 | */ | |
924 | if (!device->cap._BQC) | |
925 | goto set_level; | |
e047cca6 | 926 | |
545ef368 AL |
927 | level = acpi_video_bqc_value_to_level(device, level_old); |
928 | /* | |
929 | * On some buggy laptops, _BQC returns an uninitialized | |
930 | * value when invoked for the first time, i.e. | |
931 | * level_old is invalid (no matter whether it's a level | |
932 | * or an index). Set the backlight to max_level in this case. | |
933 | */ | |
934 | for (i = 2; i < br->count; i++) | |
935 | if (level == br->levels[i]) | |
936 | break; | |
937 | if (i == br->count || !level) | |
938 | level = max_level; | |
e047cca6 | 939 | |
e047cca6 | 940 | set_level: |
90c53ca4 | 941 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
942 | if (result) |
943 | goto out_free_levels; | |
1a7c618a | 944 | |
d32f6947 ZR |
945 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
946 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 947 | kfree(obj); |
1a7c618a | 948 | return result; |
469778c1 JJ |
949 | |
950 | out_free_levels: | |
951 | kfree(br->levels); | |
952 | out_free: | |
953 | kfree(br); | |
954 | out: | |
955 | device->brightness = NULL; | |
956 | kfree(obj); | |
1a7c618a | 957 | return result; |
469778c1 JJ |
958 | } |
959 | ||
960 | /* | |
961 | * Arg: | |
962 | * device : video output device (LCD, CRT, ..) | |
963 | * | |
964 | * Return Value: | |
21fcb34e | 965 | * None |
1da177e4 | 966 | * |
98fb8fe1 | 967 | * Find out all required AML methods defined under the output |
1da177e4 LT |
968 | * device. |
969 | */ | |
970 | ||
4be44fcd | 971 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 972 | { |
952c63e9 | 973 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 974 | device->cap._ADR = 1; |
952c63e9 | 975 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 976 | device->cap._BCL = 1; |
952c63e9 | 977 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 978 | device->cap._BCM = 1; |
952c63e9 | 979 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 980 | device->cap._BQC = 1; |
952c63e9 | 981 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
982 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
983 | device->cap._BCQ = 1; | |
984 | } | |
985 | ||
952c63e9 | 986 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 987 | device->cap._DDC = 1; |
1da177e4 LT |
988 | } |
989 | ||
990 | /* | |
21fcb34e FC |
991 | * Arg: |
992 | * device : video output device (VGA) | |
1da177e4 LT |
993 | * |
994 | * Return Value: | |
21fcb34e | 995 | * None |
1da177e4 | 996 | * |
98fb8fe1 | 997 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
998 | */ |
999 | ||
4be44fcd | 1000 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1001 | { |
952c63e9 | 1002 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 1003 | video->cap._DOS = 1; |
952c63e9 | 1004 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 1005 | video->cap._DOD = 1; |
952c63e9 | 1006 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 1007 | video->cap._ROM = 1; |
952c63e9 | 1008 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 1009 | video->cap._GPD = 1; |
952c63e9 | 1010 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 1011 | video->cap._SPD = 1; |
952c63e9 | 1012 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 1013 | video->cap._VPO = 1; |
1da177e4 LT |
1014 | } |
1015 | ||
1016 | /* | |
1017 | * Check whether the video bus device has required AML method to | |
1018 | * support the desired features | |
1019 | */ | |
1020 | ||
4be44fcd | 1021 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1022 | { |
4be44fcd | 1023 | acpi_status status = -ENOENT; |
1e4cffe7 | 1024 | struct pci_dev *dev; |
1da177e4 LT |
1025 | |
1026 | if (!video) | |
d550d98d | 1027 | return -EINVAL; |
1da177e4 | 1028 | |
1e4cffe7 | 1029 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1030 | if (!dev) |
1031 | return -ENODEV; | |
1e4cffe7 | 1032 | pci_dev_put(dev); |
22c13f9d | 1033 | |
21fcb34e FC |
1034 | /* |
1035 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1036 | * to check well known required nodes. |
1037 | */ | |
1038 | ||
98fb8fe1 | 1039 | /* Does this device support video switching? */ |
3a1151e3 SB |
1040 | if (video->cap._DOS || video->cap._DOD) { |
1041 | if (!video->cap._DOS) { | |
1042 | printk(KERN_WARNING FW_BUG | |
1043 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1044 | acpi_device_bid(video->device)); | |
1045 | } | |
1da177e4 LT |
1046 | video->flags.multihead = 1; |
1047 | status = 0; | |
1048 | } | |
1049 | ||
98fb8fe1 | 1050 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1051 | if (video->cap._ROM) { |
1da177e4 LT |
1052 | video->flags.rom = 1; |
1053 | status = 0; | |
1054 | } | |
1055 | ||
98fb8fe1 | 1056 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1057 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1058 | video->flags.post = 1; |
1059 | status = 0; | |
1060 | } | |
1061 | ||
d550d98d | 1062 | return status; |
1da177e4 LT |
1063 | } |
1064 | ||
21fcb34e FC |
1065 | /* |
1066 | * -------------------------------------------------------------------------- | |
1067 | * Driver Interface | |
1068 | * -------------------------------------------------------------------------- | |
1069 | */ | |
1da177e4 LT |
1070 | |
1071 | /* device interface */ | |
915ea7e4 | 1072 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1073 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1074 | { | |
78eed028 DT |
1075 | struct acpi_video_enumerated_device *ids; |
1076 | int i; | |
1077 | ||
1078 | for (i = 0; i < video->attached_count; i++) { | |
1079 | ids = &video->attached_array[i]; | |
1080 | if ((ids->value.int_val & 0xffff) == device_id) | |
1081 | return &ids->value.attrib; | |
1082 | } | |
82cae999 | 1083 | |
82cae999 RZ |
1084 | return NULL; |
1085 | } | |
1da177e4 | 1086 | |
e92a7162 MG |
1087 | static int |
1088 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1089 | unsigned long device_id) | |
1090 | { | |
1091 | struct acpi_video_enumerated_device *ids; | |
1092 | int i; | |
1093 | ||
1094 | for (i = 0; i < video->attached_count; i++) { | |
1095 | ids = &video->attached_array[i]; | |
1096 | if ((ids->value.int_val & 0xffff) == device_id) | |
1097 | return ids->value.int_val; | |
1098 | } | |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
1da177e4 | 1103 | static int |
4be44fcd LB |
1104 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1105 | struct acpi_video_bus *video) | |
1da177e4 | 1106 | { |
27663c58 | 1107 | unsigned long long device_id; |
e92a7162 | 1108 | int status, device_type; |
4be44fcd | 1109 | struct acpi_video_device *data; |
915ea7e4 | 1110 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1111 | |
4be44fcd LB |
1112 | status = |
1113 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1114 | /* Some device omits _ADR, we skip them instead of fail */ |
1115 | if (ACPI_FAILURE(status)) | |
1116 | return 0; | |
1da177e4 | 1117 | |
91e13aa3 AL |
1118 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1119 | if (!data) | |
1120 | return -ENOMEM; | |
82cae999 | 1121 | |
91e13aa3 AL |
1122 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1123 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1124 | device->driver_data = data; | |
1125 | ||
1126 | data->device_id = device_id; | |
1127 | data->video = video; | |
1128 | data->dev = device; | |
8ab58e8e LT |
1129 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1130 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1131 | |
1132 | attribute = acpi_video_get_device_attr(video, device_id); | |
1133 | ||
915ea7e4 | 1134 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1135 | switch (attribute->display_type) { |
1136 | case ACPI_VIDEO_DISPLAY_CRT: | |
1137 | data->flags.crt = 1; | |
1138 | break; | |
1139 | case ACPI_VIDEO_DISPLAY_TV: | |
1140 | data->flags.tvout = 1; | |
1141 | break; | |
1142 | case ACPI_VIDEO_DISPLAY_DVI: | |
1143 | data->flags.dvi = 1; | |
1144 | break; | |
1145 | case ACPI_VIDEO_DISPLAY_LCD: | |
1146 | data->flags.lcd = 1; | |
1147 | break; | |
1148 | default: | |
1149 | data->flags.unknown = 1; | |
1150 | break; | |
1151 | } | |
915ea7e4 | 1152 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1153 | data->flags.bios = 1; |
1154 | } else { | |
1155 | /* Check for legacy IDs */ | |
1156 | device_type = acpi_video_get_device_type(video, device_id); | |
1157 | /* Ignore bits 16 and 18-20 */ | |
1158 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1159 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1160 | data->flags.crt = 1; | |
1161 | break; | |
1162 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1163 | data->flags.lcd = 1; | |
1164 | break; | |
1165 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1166 | data->flags.tvout = 1; | |
1167 | break; | |
1168 | default: | |
1169 | data->flags.unknown = 1; | |
e92a7162 | 1170 | } |
91e13aa3 | 1171 | } |
4be44fcd | 1172 | |
91e13aa3 AL |
1173 | acpi_video_device_bind(video, data); |
1174 | acpi_video_device_find_cap(data); | |
1da177e4 | 1175 | |
91e13aa3 AL |
1176 | mutex_lock(&video->device_list_lock); |
1177 | list_add_tail(&data->entry, &video->video_device_list); | |
1178 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1179 | |
91e13aa3 | 1180 | return status; |
1da177e4 LT |
1181 | } |
1182 | ||
1183 | /* | |
1184 | * Arg: | |
21fcb34e | 1185 | * video : video bus device |
1da177e4 LT |
1186 | * |
1187 | * Return: | |
21fcb34e FC |
1188 | * none |
1189 | * | |
1190 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1191 | * bind the ids with the corresponding video devices |
1192 | * under the video bus. | |
4be44fcd | 1193 | */ |
1da177e4 | 1194 | |
4be44fcd | 1195 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1196 | { |
ff102ea9 DT |
1197 | struct acpi_video_device *dev; |
1198 | ||
bbac81f5 | 1199 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1200 | |
1201 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1202 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1203 | |
bbac81f5 | 1204 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1205 | } |
1206 | ||
1207 | /* | |
1208 | * Arg: | |
21fcb34e FC |
1209 | * video : video bus device |
1210 | * device : video output device under the video | |
1211 | * bus | |
1da177e4 LT |
1212 | * |
1213 | * Return: | |
21fcb34e FC |
1214 | * none |
1215 | * | |
1da177e4 LT |
1216 | * Bind the ids with the corresponding video devices |
1217 | * under the video bus. | |
4be44fcd | 1218 | */ |
1da177e4 LT |
1219 | |
1220 | static void | |
4be44fcd LB |
1221 | acpi_video_device_bind(struct acpi_video_bus *video, |
1222 | struct acpi_video_device *device) | |
1da177e4 | 1223 | { |
78eed028 | 1224 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1225 | int i; |
1da177e4 | 1226 | |
78eed028 DT |
1227 | for (i = 0; i < video->attached_count; i++) { |
1228 | ids = &video->attached_array[i]; | |
1229 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1230 | ids->bind_info = device; | |
1da177e4 LT |
1231 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1232 | } | |
1233 | } | |
1da177e4 LT |
1234 | } |
1235 | ||
0b8db271 AL |
1236 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1237 | { | |
1238 | struct acpi_video_bus *video = device->video; | |
1239 | int i; | |
1240 | ||
b4df4636 AL |
1241 | /* |
1242 | * If we have a broken _DOD or we have more than 8 output devices | |
1243 | * under the graphics controller node that we can't proper deal with | |
1244 | * in the operation region code currently, no need to test. | |
1245 | */ | |
1246 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1247 | return true; |
1248 | ||
1249 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1250 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1251 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1252 | return true; |
1253 | } | |
1254 | ||
1255 | return false; | |
1256 | } | |
1257 | ||
1da177e4 LT |
1258 | /* |
1259 | * Arg: | |
21fcb34e | 1260 | * video : video bus device |
1da177e4 LT |
1261 | * |
1262 | * Return: | |
21fcb34e FC |
1263 | * < 0 : error |
1264 | * | |
1da177e4 LT |
1265 | * Call _DOD to enumerate all devices attached to display adapter |
1266 | * | |
4be44fcd | 1267 | */ |
1da177e4 LT |
1268 | |
1269 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1270 | { | |
4be44fcd LB |
1271 | int status; |
1272 | int count; | |
1273 | int i; | |
78eed028 | 1274 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1275 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1276 | union acpi_object *dod = NULL; | |
1277 | union acpi_object *obj; | |
1da177e4 | 1278 | |
90130268 | 1279 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1280 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1281 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1282 | return status; |
1da177e4 LT |
1283 | } |
1284 | ||
50dd0969 | 1285 | dod = buffer.pointer; |
1da177e4 | 1286 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1287 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1288 | status = -EFAULT; |
1289 | goto out; | |
1290 | } | |
1291 | ||
1292 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1293 | dod->package.count)); |
1da177e4 | 1294 | |
78eed028 DT |
1295 | active_list = kcalloc(1 + dod->package.count, |
1296 | sizeof(struct acpi_video_enumerated_device), | |
1297 | GFP_KERNEL); | |
1298 | if (!active_list) { | |
1da177e4 LT |
1299 | status = -ENOMEM; |
1300 | goto out; | |
1301 | } | |
1302 | ||
1303 | count = 0; | |
1304 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1305 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1306 | |
1307 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1308 | printk(KERN_ERR PREFIX |
1309 | "Invalid _DOD data in element %d\n", i); | |
1310 | continue; | |
1da177e4 | 1311 | } |
78eed028 DT |
1312 | |
1313 | active_list[count].value.int_val = obj->integer.value; | |
1314 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1315 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1316 | (int)obj->integer.value)); | |
1da177e4 LT |
1317 | count++; |
1318 | } | |
1da177e4 | 1319 | |
6044ec88 | 1320 | kfree(video->attached_array); |
4be44fcd | 1321 | |
78eed028 | 1322 | video->attached_array = active_list; |
1da177e4 | 1323 | video->attached_count = count; |
78eed028 | 1324 | |
915ea7e4 | 1325 | out: |
02438d87 | 1326 | kfree(buffer.pointer); |
d550d98d | 1327 | return status; |
1da177e4 LT |
1328 | } |
1329 | ||
4be44fcd LB |
1330 | static int |
1331 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1332 | u32 level_current, u32 event) | |
1da177e4 | 1333 | { |
63f0edfc | 1334 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1335 | max = max_below = 0; |
1336 | min = min_above = 255; | |
63f0edfc | 1337 | /* Find closest level to level_current */ |
0a3db1ce | 1338 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1339 | l = device->brightness->levels[i]; |
1340 | if (abs(l - level_current) < abs(delta)) { | |
1341 | delta = l - level_current; | |
1342 | if (!delta) | |
1343 | break; | |
1344 | } | |
1345 | } | |
1346 | /* Ajust level_current to closest available level */ | |
1347 | level_current += delta; | |
0a3db1ce | 1348 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1349 | l = device->brightness->levels[i]; |
1350 | if (l < min) | |
1351 | min = l; | |
1352 | if (l > max) | |
1353 | max = l; | |
1354 | if (l < min_above && l > level_current) | |
1355 | min_above = l; | |
1356 | if (l > max_below && l < level_current) | |
1357 | max_below = l; | |
1358 | } | |
1359 | ||
1360 | switch (event) { | |
1361 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1362 | return (level_current < max) ? min_above : min; | |
1363 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1364 | return (level_current < max) ? min_above : max; | |
1365 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1366 | return (level_current > min) ? max_below : min; | |
1367 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1368 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1369 | return 0; | |
1370 | default: | |
1371 | return level_current; | |
1372 | } | |
1da177e4 LT |
1373 | } |
1374 | ||
8ab58e8e LT |
1375 | static void |
1376 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1377 | { |
8ab58e8e LT |
1378 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1379 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1380 | unsigned long long level_current, level_next; |
8ab58e8e | 1381 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1382 | int result = -EINVAL; |
1383 | ||
fbc9fe1b AL |
1384 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1385 | if (!acpi_video_verify_backlight_support()) | |
8ab58e8e | 1386 | return; |
28c32e99 | 1387 | |
469778c1 | 1388 | if (!device->brightness) |
c8890f90 ZR |
1389 | goto out; |
1390 | ||
1391 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1392 | &level_current, |
1393 | false); | |
c8890f90 ZR |
1394 | if (result) |
1395 | goto out; | |
1396 | ||
1da177e4 | 1397 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1398 | |
24450c7a | 1399 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1400 | |
36342742 MG |
1401 | if (!result) |
1402 | backlight_force_update(device->backlight, | |
1403 | BACKLIGHT_UPDATE_HOTKEY); | |
1404 | ||
c8890f90 ZR |
1405 | out: |
1406 | if (result) | |
1407 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1408 | } |
1409 | ||
e92a7162 MG |
1410 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1411 | void **edid) | |
1412 | { | |
1413 | struct acpi_video_bus *video; | |
1414 | struct acpi_video_device *video_device; | |
1415 | union acpi_object *buffer = NULL; | |
1416 | acpi_status status; | |
1417 | int i, length; | |
1418 | ||
1419 | if (!device || !acpi_driver_data(device)) | |
1420 | return -EINVAL; | |
1421 | ||
1422 | video = acpi_driver_data(device); | |
1423 | ||
1424 | for (i = 0; i < video->attached_count; i++) { | |
1425 | video_device = video->attached_array[i].bind_info; | |
1426 | length = 256; | |
1427 | ||
1428 | if (!video_device) | |
1429 | continue; | |
1430 | ||
82069552 ZR |
1431 | if (!video_device->cap._DDC) |
1432 | continue; | |
1433 | ||
e92a7162 MG |
1434 | if (type) { |
1435 | switch (type) { | |
1436 | case ACPI_VIDEO_DISPLAY_CRT: | |
1437 | if (!video_device->flags.crt) | |
1438 | continue; | |
1439 | break; | |
1440 | case ACPI_VIDEO_DISPLAY_TV: | |
1441 | if (!video_device->flags.tvout) | |
1442 | continue; | |
1443 | break; | |
1444 | case ACPI_VIDEO_DISPLAY_DVI: | |
1445 | if (!video_device->flags.dvi) | |
1446 | continue; | |
1447 | break; | |
1448 | case ACPI_VIDEO_DISPLAY_LCD: | |
1449 | if (!video_device->flags.lcd) | |
1450 | continue; | |
1451 | break; | |
1452 | } | |
1453 | } else if (video_device->device_id != device_id) { | |
1454 | continue; | |
1455 | } | |
1456 | ||
1457 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1458 | ||
1459 | if (ACPI_FAILURE(status) || !buffer || | |
1460 | buffer->type != ACPI_TYPE_BUFFER) { | |
1461 | length = 128; | |
1462 | status = acpi_video_device_EDID(video_device, &buffer, | |
1463 | length); | |
1464 | if (ACPI_FAILURE(status) || !buffer || | |
1465 | buffer->type != ACPI_TYPE_BUFFER) { | |
1466 | continue; | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | *edid = buffer->buffer.pointer; | |
1471 | return length; | |
1472 | } | |
1473 | ||
1474 | return -ENODEV; | |
1475 | } | |
1476 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1477 | ||
1da177e4 | 1478 | static int |
4be44fcd LB |
1479 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1480 | struct acpi_device *device) | |
1da177e4 | 1481 | { |
fba4e087 | 1482 | int status = 0; |
ff102ea9 | 1483 | struct acpi_device *dev; |
1da177e4 | 1484 | |
fba4e087 IM |
1485 | /* |
1486 | * There are systems where video module known to work fine regardless | |
1487 | * of broken _DOD and ignoring returned value here doesn't cause | |
1488 | * any issues later. | |
1489 | */ | |
1490 | acpi_video_device_enumerate(video); | |
1da177e4 | 1491 | |
ff102ea9 | 1492 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1493 | |
1494 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1495 | if (status) { |
91e13aa3 AL |
1496 | dev_err(&dev->dev, "Can't attach device\n"); |
1497 | break; | |
1da177e4 | 1498 | } |
b4df4636 | 1499 | video->child_count++; |
1da177e4 | 1500 | } |
d550d98d | 1501 | return status; |
1da177e4 LT |
1502 | } |
1503 | ||
1da177e4 LT |
1504 | /* acpi_video interface */ |
1505 | ||
efaa14c7 AL |
1506 | /* |
1507 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1508 | * preform any automatic brightness change on receiving a notification. | |
1509 | */ | |
4be44fcd | 1510 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1511 | { |
efaa14c7 | 1512 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1513 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1514 | } |
1515 | ||
4be44fcd | 1516 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1517 | { |
efaa14c7 | 1518 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1519 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1520 | } |
1521 | ||
7015558f | 1522 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1523 | { |
7015558f | 1524 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1525 | struct input_dev *input; |
17c452f9 | 1526 | int keycode = 0; |
e9dab196 | 1527 | |
67b662e1 | 1528 | if (!video || !video->input) |
d550d98d | 1529 | return; |
1da177e4 | 1530 | |
e9dab196 | 1531 | input = video->input; |
1da177e4 LT |
1532 | |
1533 | switch (event) { | |
98fb8fe1 | 1534 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1535 | * most likely via hotkey. */ |
8a37c65d | 1536 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1537 | break; |
1538 | ||
98fb8fe1 | 1539 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1540 | * connector. */ |
1541 | acpi_video_device_enumerate(video); | |
1542 | acpi_video_device_rebind(video); | |
e9dab196 | 1543 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1544 | break; |
1545 | ||
4be44fcd | 1546 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1547 | keycode = KEY_SWITCHVIDEOMODE; |
1548 | break; | |
4be44fcd | 1549 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1550 | keycode = KEY_VIDEO_NEXT; |
1551 | break; | |
4be44fcd | 1552 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1553 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1554 | break; |
1555 | ||
1556 | default: | |
1557 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1558 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1559 | break; |
1560 | } | |
1561 | ||
8a37c65d LT |
1562 | if (acpi_notifier_call_chain(device, event, 0)) |
1563 | /* Something vetoed the keypress. */ | |
1564 | keycode = 0; | |
17c452f9 MG |
1565 | |
1566 | if (keycode) { | |
1567 | input_report_key(input, keycode, 1); | |
1568 | input_sync(input); | |
1569 | input_report_key(input, keycode, 0); | |
1570 | input_sync(input); | |
1571 | } | |
e9dab196 | 1572 | |
d550d98d | 1573 | return; |
1da177e4 LT |
1574 | } |
1575 | ||
8ab58e8e LT |
1576 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1577 | u32 event) | |
1578 | { | |
1579 | if (!brightness_switch_enabled) | |
1580 | return; | |
1581 | ||
1582 | video_device->switch_brightness_event = event; | |
1583 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1584 | } | |
1585 | ||
4be44fcd | 1586 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1587 | { |
50dd0969 | 1588 | struct acpi_video_device *video_device = data; |
4be44fcd | 1589 | struct acpi_device *device = NULL; |
e9dab196 LY |
1590 | struct acpi_video_bus *bus; |
1591 | struct input_dev *input; | |
17c452f9 | 1592 | int keycode = 0; |
1da177e4 | 1593 | |
1da177e4 | 1594 | if (!video_device) |
d550d98d | 1595 | return; |
1da177e4 | 1596 | |
e6afa0de | 1597 | device = video_device->dev; |
e9dab196 LY |
1598 | bus = video_device->video; |
1599 | input = bus->input; | |
1da177e4 LT |
1600 | |
1601 | switch (event) { | |
4be44fcd | 1602 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1603 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1604 | keycode = KEY_BRIGHTNESS_CYCLE; |
1605 | break; | |
4be44fcd | 1606 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1607 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1608 | keycode = KEY_BRIGHTNESSUP; |
1609 | break; | |
4be44fcd | 1610 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1611 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1612 | keycode = KEY_BRIGHTNESSDOWN; |
1613 | break; | |
70f23fd6 | 1614 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1615 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1616 | keycode = KEY_BRIGHTNESS_ZERO; |
1617 | break; | |
4be44fcd | 1618 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1619 | brightness_switch_event(video_device, event); |
e9dab196 | 1620 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1621 | break; |
1622 | default: | |
1623 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1624 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1625 | break; |
1626 | } | |
e9dab196 | 1627 | |
7761f638 | 1628 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1629 | |
1630 | if (keycode) { | |
1631 | input_report_key(input, keycode, 1); | |
1632 | input_sync(input); | |
1633 | input_report_key(input, keycode, 0); | |
1634 | input_sync(input); | |
1635 | } | |
e9dab196 | 1636 | |
d550d98d | 1637 | return; |
1da177e4 LT |
1638 | } |
1639 | ||
ac7729da RW |
1640 | static int acpi_video_resume(struct notifier_block *nb, |
1641 | unsigned long val, void *ign) | |
863c1490 MG |
1642 | { |
1643 | struct acpi_video_bus *video; | |
1644 | struct acpi_video_device *video_device; | |
1645 | int i; | |
1646 | ||
ac7729da RW |
1647 | switch (val) { |
1648 | case PM_HIBERNATION_PREPARE: | |
1649 | case PM_SUSPEND_PREPARE: | |
1650 | case PM_RESTORE_PREPARE: | |
1651 | return NOTIFY_DONE; | |
1652 | } | |
863c1490 | 1653 | |
ac7729da RW |
1654 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1655 | ||
1656 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1657 | |
1658 | for (i = 0; i < video->attached_count; i++) { | |
1659 | video_device = video->attached_array[i].bind_info; | |
1660 | if (video_device && video_device->backlight) | |
1661 | acpi_video_set_brightness(video_device->backlight); | |
1662 | } | |
ac7729da RW |
1663 | |
1664 | return NOTIFY_OK; | |
863c1490 MG |
1665 | } |
1666 | ||
c504f8cb ZR |
1667 | static acpi_status |
1668 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1669 | void **return_value) | |
1670 | { | |
1671 | struct acpi_device *device = context; | |
1672 | struct acpi_device *sibling; | |
1673 | int result; | |
1674 | ||
1675 | if (handle == device->handle) | |
1676 | return AE_CTRL_TERMINATE; | |
1677 | ||
1678 | result = acpi_bus_get_device(handle, &sibling); | |
1679 | if (result) | |
1680 | return AE_OK; | |
1681 | ||
1682 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1683 | return AE_ALREADY_EXISTS; | |
1684 | ||
1685 | return AE_OK; | |
1686 | } | |
1687 | ||
67b662e1 AL |
1688 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1689 | { | |
99678ed7 HG |
1690 | struct backlight_properties props; |
1691 | struct pci_dev *pdev; | |
1692 | acpi_handle acpi_parent; | |
1693 | struct device *parent = NULL; | |
1694 | int result; | |
1695 | static int count; | |
1696 | char *name; | |
67b662e1 | 1697 | |
0b8db271 AL |
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(device)) { | |
1703 | dev_dbg(&device->dev->dev, "not in _DOD list, ignore\n"); | |
1704 | return; | |
1705 | } | |
1706 | ||
99678ed7 HG |
1707 | result = acpi_video_init_brightness(device); |
1708 | if (result) | |
1709 | return; | |
1710 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1711 | if (!name) | |
1712 | return; | |
1713 | count++; | |
67b662e1 | 1714 | |
99678ed7 | 1715 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1716 | |
99678ed7 HG |
1717 | pdev = acpi_get_pci_dev(acpi_parent); |
1718 | if (pdev) { | |
1719 | parent = &pdev->dev; | |
1720 | pci_dev_put(pdev); | |
1721 | } | |
67b662e1 | 1722 | |
99678ed7 HG |
1723 | memset(&props, 0, sizeof(struct backlight_properties)); |
1724 | props.type = BACKLIGHT_FIRMWARE; | |
1725 | props.max_brightness = device->brightness->count - 3; | |
1726 | device->backlight = backlight_device_register(name, | |
1727 | parent, | |
1728 | device, | |
1729 | &acpi_backlight_ops, | |
1730 | &props); | |
1731 | kfree(name); | |
1732 | if (IS_ERR(device->backlight)) | |
1733 | return; | |
67b662e1 | 1734 | |
99678ed7 HG |
1735 | /* |
1736 | * Save current brightness level in case we have to restore it | |
1737 | * before acpi_video_device_lcd_set_level() is called next time. | |
1738 | */ | |
1739 | device->backlight->props.brightness = | |
1740 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1741 | |
99678ed7 HG |
1742 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1743 | device->dev, &video_cooling_ops); | |
1744 | if (IS_ERR(device->cooling_dev)) { | |
1745 | /* | |
1746 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1747 | * Also, why the hell we are returning early and not attempt to | |
1748 | * register video output if cooling device registration failed? | |
1749 | * -- dtor | |
1750 | */ | |
1751 | device->cooling_dev = NULL; | |
1752 | return; | |
67b662e1 | 1753 | } |
99678ed7 HG |
1754 | |
1755 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1756 | device->cooling_dev->id); | |
1757 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1758 | &device->cooling_dev->device.kobj, | |
1759 | "thermal_cooling"); | |
1760 | if (result) | |
1761 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1762 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1763 | &device->dev->dev.kobj, "device"); | |
1764 | if (result) | |
1765 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1766 | } |
1767 | ||
dce4ec2e AL |
1768 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1769 | { | |
1770 | struct acpi_video_device *dev; | |
1771 | union acpi_object *levels; | |
1772 | ||
1773 | mutex_lock(&video->device_list_lock); | |
1774 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
1775 | if (!acpi_video_device_lcd_query_levels(dev, &levels)) | |
1776 | kfree(levels); | |
1777 | } | |
1778 | mutex_unlock(&video->device_list_lock); | |
1779 | } | |
1780 | ||
67b662e1 AL |
1781 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1782 | { | |
1783 | struct acpi_video_device *dev; | |
1784 | ||
53a92ba7 HG |
1785 | if (video->backlight_registered) |
1786 | return 0; | |
1787 | ||
dce4ec2e AL |
1788 | acpi_video_run_bcl_for_osi(video); |
1789 | ||
99678ed7 HG |
1790 | if (!acpi_video_verify_backlight_support()) |
1791 | return 0; | |
1792 | ||
67b662e1 AL |
1793 | mutex_lock(&video->device_list_lock); |
1794 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1795 | acpi_video_dev_register_backlight(dev); | |
1796 | mutex_unlock(&video->device_list_lock); | |
1797 | ||
99678ed7 HG |
1798 | video->backlight_registered = true; |
1799 | ||
67b662e1 AL |
1800 | video->pm_nb.notifier_call = acpi_video_resume; |
1801 | video->pm_nb.priority = 0; | |
1802 | return register_pm_notifier(&video->pm_nb); | |
1803 | } | |
1804 | ||
1805 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1806 | { | |
1807 | if (device->backlight) { | |
1808 | backlight_device_unregister(device->backlight); | |
1809 | device->backlight = NULL; | |
1810 | } | |
1811 | if (device->brightness) { | |
1812 | kfree(device->brightness->levels); | |
1813 | kfree(device->brightness); | |
1814 | device->brightness = NULL; | |
1815 | } | |
1816 | if (device->cooling_dev) { | |
1817 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1818 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1819 | thermal_cooling_device_unregister(device->cooling_dev); | |
1820 | device->cooling_dev = NULL; | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1825 | { | |
1826 | struct acpi_video_device *dev; | |
99678ed7 HG |
1827 | int error; |
1828 | ||
1829 | if (!video->backlight_registered) | |
1830 | return 0; | |
1831 | ||
1832 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1833 | |
1834 | mutex_lock(&video->device_list_lock); | |
1835 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1836 | acpi_video_dev_unregister_backlight(dev); | |
1837 | mutex_unlock(&video->device_list_lock); | |
1838 | ||
99678ed7 HG |
1839 | video->backlight_registered = false; |
1840 | ||
67b662e1 AL |
1841 | return error; |
1842 | } | |
1843 | ||
1844 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1845 | { | |
1846 | acpi_status status; | |
1847 | struct acpi_device *adev = device->dev; | |
1848 | ||
1849 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1850 | acpi_video_device_notify, device); | |
1851 | if (ACPI_FAILURE(status)) | |
1852 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1853 | else | |
1854 | device->flags.notify = 1; | |
1855 | } | |
1856 | ||
1857 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1858 | { | |
1859 | struct input_dev *input; | |
1860 | struct acpi_video_device *dev; | |
1861 | int error; | |
1862 | ||
1863 | video->input = input = input_allocate_device(); | |
1864 | if (!input) { | |
1865 | error = -ENOMEM; | |
1866 | goto out; | |
1867 | } | |
1868 | ||
1869 | error = acpi_video_bus_start_devices(video); | |
1870 | if (error) | |
1871 | goto err_free_input; | |
1872 | ||
1873 | snprintf(video->phys, sizeof(video->phys), | |
1874 | "%s/video/input0", acpi_device_hid(video->device)); | |
1875 | ||
1876 | input->name = acpi_device_name(video->device); | |
1877 | input->phys = video->phys; | |
1878 | input->id.bustype = BUS_HOST; | |
1879 | input->id.product = 0x06; | |
1880 | input->dev.parent = &video->device->dev; | |
1881 | input->evbit[0] = BIT(EV_KEY); | |
1882 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1883 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1884 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1885 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1886 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1887 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1888 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1889 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1890 | ||
1891 | error = input_register_device(input); | |
1892 | if (error) | |
1893 | goto err_stop_dev; | |
1894 | ||
1895 | mutex_lock(&video->device_list_lock); | |
1896 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1897 | acpi_video_dev_add_notify_handler(dev); | |
1898 | mutex_unlock(&video->device_list_lock); | |
1899 | ||
1900 | return 0; | |
1901 | ||
1902 | err_stop_dev: | |
1903 | acpi_video_bus_stop_devices(video); | |
1904 | err_free_input: | |
1905 | input_free_device(input); | |
1906 | video->input = NULL; | |
1907 | out: | |
1908 | return error; | |
1909 | } | |
1910 | ||
1911 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1912 | { | |
1913 | if (dev->flags.notify) { | |
1914 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1915 | acpi_video_device_notify); | |
1916 | dev->flags.notify = 0; | |
1917 | } | |
1918 | } | |
1919 | ||
1920 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1921 | { | |
1922 | struct acpi_video_device *dev; | |
1923 | ||
1924 | mutex_lock(&video->device_list_lock); | |
1925 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1926 | acpi_video_dev_remove_notify_handler(dev); | |
1927 | mutex_unlock(&video->device_list_lock); | |
1928 | ||
1929 | acpi_video_bus_stop_devices(video); | |
1930 | input_unregister_device(video->input); | |
1931 | video->input = NULL; | |
1932 | } | |
1933 | ||
53a92ba7 HG |
1934 | static int acpi_video_backlight_notify(struct notifier_block *nb, |
1935 | unsigned long val, void *bd) | |
1936 | { | |
1937 | struct backlight_device *backlight = bd; | |
1938 | struct acpi_video_bus *video; | |
1939 | ||
1940 | /* acpi_video_verify_backlight_support only cares about raw devices */ | |
1941 | if (backlight->props.type != BACKLIGHT_RAW) | |
1942 | return NOTIFY_DONE; | |
1943 | ||
1944 | video = container_of(nb, struct acpi_video_bus, backlight_nb); | |
1945 | ||
1946 | switch (val) { | |
1947 | case BACKLIGHT_REGISTERED: | |
1948 | if (!acpi_video_verify_backlight_support()) | |
1949 | acpi_video_bus_unregister_backlight(video); | |
1950 | break; | |
1951 | case BACKLIGHT_UNREGISTERED: | |
1952 | acpi_video_bus_register_backlight(video); | |
1953 | break; | |
1954 | } | |
1955 | ||
1956 | return NOTIFY_OK; | |
1957 | } | |
1958 | ||
1959 | static int acpi_video_bus_add_backlight_notify_handler( | |
1960 | struct acpi_video_bus *video) | |
1961 | { | |
1962 | int error; | |
1963 | ||
1964 | video->backlight_nb.notifier_call = acpi_video_backlight_notify; | |
1965 | video->backlight_nb.priority = 0; | |
1966 | error = backlight_register_notifier(&video->backlight_nb); | |
1967 | if (error == 0) | |
1968 | video->backlight_notifier_registered = true; | |
1969 | ||
1970 | return error; | |
1971 | } | |
1972 | ||
1973 | static int acpi_video_bus_remove_backlight_notify_handler( | |
1974 | struct acpi_video_bus *video) | |
1975 | { | |
1976 | if (!video->backlight_notifier_registered) | |
1977 | return 0; | |
1978 | ||
1979 | video->backlight_notifier_registered = false; | |
1980 | ||
1981 | return backlight_unregister_notifier(&video->backlight_nb); | |
1982 | } | |
1983 | ||
67b662e1 AL |
1984 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1985 | { | |
1986 | struct acpi_video_device *dev, *next; | |
1987 | ||
1988 | mutex_lock(&video->device_list_lock); | |
1989 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1990 | list_del(&dev->entry); | |
1991 | kfree(dev); | |
1992 | } | |
1993 | mutex_unlock(&video->device_list_lock); | |
1994 | ||
1995 | return 0; | |
1996 | } | |
1997 | ||
ac7729da RW |
1998 | static int instance; |
1999 | ||
4be44fcd | 2000 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 2001 | { |
f51e8391 | 2002 | struct acpi_video_bus *video; |
f51e8391 | 2003 | int error; |
c504f8cb ZR |
2004 | acpi_status status; |
2005 | ||
2006 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
2007 | device->parent->handle, 1, | |
2008 | acpi_video_bus_match, NULL, | |
2009 | device, NULL); | |
2010 | if (status == AE_ALREADY_EXISTS) { | |
2011 | printk(KERN_WARNING FW_BUG | |
2012 | "Duplicate ACPI video bus devices for the" | |
2013 | " same VGA controller, please try module " | |
2014 | "parameter \"video.allow_duplicates=1\"" | |
2015 | "if the current driver doesn't work.\n"); | |
2016 | if (!allow_duplicates) | |
2017 | return -ENODEV; | |
2018 | } | |
1da177e4 | 2019 | |
36bcbec7 | 2020 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 2021 | if (!video) |
d550d98d | 2022 | return -ENOMEM; |
1da177e4 | 2023 | |
e6d9da1d ZR |
2024 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
2025 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
2026 | if (instance) | |
2027 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 2028 | instance++; |
e6d9da1d | 2029 | } |
f3b39f13 ZY |
2030 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
2031 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
2032 | if (instance) | |
2033 | device->pnp.bus_id[3] = '0' + instance; | |
2034 | instance++; | |
2035 | } | |
e6d9da1d | 2036 | |
e6afa0de | 2037 | video->device = device; |
1da177e4 LT |
2038 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
2039 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 2040 | device->driver_data = video; |
1da177e4 LT |
2041 | |
2042 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
2043 | error = acpi_video_bus_check(video); |
2044 | if (error) | |
2045 | goto err_free_video; | |
1da177e4 | 2046 | |
bbac81f5 | 2047 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
2048 | INIT_LIST_HEAD(&video->video_device_list); |
2049 | ||
ea9f8856 IM |
2050 | error = acpi_video_bus_get_devices(video, device); |
2051 | if (error) | |
91e13aa3 | 2052 | goto err_put_video; |
1da177e4 | 2053 | |
1da177e4 | 2054 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
2055 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
2056 | video->flags.multihead ? "yes" : "no", | |
2057 | video->flags.rom ? "yes" : "no", | |
2058 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
2059 | mutex_lock(&video_list_lock); |
2060 | list_add_tail(&video->entry, &video_bus_head); | |
2061 | mutex_unlock(&video_list_lock); | |
1da177e4 | 2062 | |
67b662e1 AL |
2063 | acpi_video_bus_register_backlight(video); |
2064 | acpi_video_bus_add_notify_handler(video); | |
53a92ba7 | 2065 | acpi_video_bus_add_backlight_notify_handler(video); |
ac7729da | 2066 | |
f51e8391 DT |
2067 | return 0; |
2068 | ||
67b662e1 | 2069 | err_put_video: |
f51e8391 DT |
2070 | acpi_video_bus_put_devices(video); |
2071 | kfree(video->attached_array); | |
67b662e1 | 2072 | err_free_video: |
f51e8391 | 2073 | kfree(video); |
db89b4f0 | 2074 | device->driver_data = NULL; |
1da177e4 | 2075 | |
f51e8391 | 2076 | return error; |
1da177e4 LT |
2077 | } |
2078 | ||
51fac838 | 2079 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 2080 | { |
4be44fcd | 2081 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2082 | |
1da177e4 LT |
2083 | |
2084 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2085 | return -EINVAL; |
1da177e4 | 2086 | |
50dd0969 | 2087 | video = acpi_driver_data(device); |
1da177e4 | 2088 | |
53a92ba7 | 2089 | acpi_video_bus_remove_backlight_notify_handler(video); |
67b662e1 AL |
2090 | acpi_video_bus_remove_notify_handler(video); |
2091 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 2092 | acpi_video_bus_put_devices(video); |
1da177e4 | 2093 | |
67b662e1 AL |
2094 | mutex_lock(&video_list_lock); |
2095 | list_del(&video->entry); | |
2096 | mutex_unlock(&video_list_lock); | |
2097 | ||
6044ec88 | 2098 | kfree(video->attached_array); |
1da177e4 LT |
2099 | kfree(video); |
2100 | ||
d550d98d | 2101 | return 0; |
1da177e4 LT |
2102 | } |
2103 | ||
c6996bdd AC |
2104 | static int __init is_i740(struct pci_dev *dev) |
2105 | { | |
2106 | if (dev->device == 0x00D1) | |
2107 | return 1; | |
2108 | if (dev->device == 0x7000) | |
2109 | return 1; | |
2110 | return 0; | |
2111 | } | |
2112 | ||
74a365b3 MG |
2113 | static int __init intel_opregion_present(void) |
2114 | { | |
c6996bdd | 2115 | int opregion = 0; |
74a365b3 MG |
2116 | struct pci_dev *dev = NULL; |
2117 | u32 address; | |
2118 | ||
2119 | for_each_pci_dev(dev) { | |
2120 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2121 | continue; | |
2122 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2123 | continue; | |
c6996bdd AC |
2124 | /* We don't want to poke around undefined i740 registers */ |
2125 | if (is_i740(dev)) | |
2126 | continue; | |
74a365b3 MG |
2127 | pci_read_config_dword(dev, 0xfc, &address); |
2128 | if (!address) | |
2129 | continue; | |
c6996bdd | 2130 | opregion = 1; |
74a365b3 | 2131 | } |
c6996bdd | 2132 | return opregion; |
74a365b3 MG |
2133 | } |
2134 | ||
8e5c2b77 | 2135 | int acpi_video_register(void) |
1da177e4 | 2136 | { |
28d63403 CW |
2137 | int ret; |
2138 | ||
86e437f0 ZY |
2139 | if (register_count) { |
2140 | /* | |
8e5c2b77 RW |
2141 | * if the function of acpi_video_register is already called, |
2142 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
2143 | */ |
2144 | return 0; | |
2145 | } | |
1da177e4 | 2146 | |
67b662e1 AL |
2147 | mutex_init(&video_list_lock); |
2148 | INIT_LIST_HEAD(&video_bus_head); | |
2149 | ||
28d63403 CW |
2150 | ret = acpi_bus_register_driver(&acpi_video_bus); |
2151 | if (ret) | |
2152 | return ret; | |
1da177e4 | 2153 | |
86e437f0 ZY |
2154 | /* |
2155 | * When the acpi_video_bus is loaded successfully, increase | |
2156 | * the counter reference. | |
2157 | */ | |
2158 | register_count = 1; | |
2159 | ||
d550d98d | 2160 | return 0; |
1da177e4 | 2161 | } |
8e5c2b77 | 2162 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2163 | |
86e437f0 ZY |
2164 | void acpi_video_unregister(void) |
2165 | { | |
2166 | if (!register_count) { | |
2167 | /* | |
2168 | * If the acpi video bus is already unloaded, don't | |
2169 | * unload it again and return directly. | |
2170 | */ | |
2171 | return; | |
2172 | } | |
2173 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2174 | ||
86e437f0 ZY |
2175 | register_count = 0; |
2176 | ||
2177 | return; | |
2178 | } | |
2179 | EXPORT_SYMBOL(acpi_video_unregister); | |
2180 | ||
1b7f37e1 HG |
2181 | void acpi_video_unregister_backlight(void) |
2182 | { | |
2183 | struct acpi_video_bus *video; | |
2184 | ||
2185 | if (!register_count) | |
2186 | return; | |
2187 | ||
2188 | mutex_lock(&video_list_lock); | |
2189 | list_for_each_entry(video, &video_bus_head, entry) | |
2190 | acpi_video_bus_unregister_backlight(video); | |
2191 | mutex_unlock(&video_list_lock); | |
2192 | } | |
2193 | EXPORT_SYMBOL(acpi_video_unregister_backlight); | |
2194 | ||
74a365b3 MG |
2195 | /* |
2196 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2197 | * the video opregion code to be run first in order to initialise | |
2198 | * state before any ACPI video calls are made. To handle this we defer | |
2199 | * registration of the video class until the opregion code has run. | |
2200 | */ | |
2201 | ||
2202 | static int __init acpi_video_init(void) | |
2203 | { | |
6e17cb12 CW |
2204 | /* |
2205 | * Let the module load even if ACPI is disabled (e.g. due to | |
2206 | * a broken BIOS) so that i915.ko can still be loaded on such | |
2207 | * old systems without an AcpiOpRegion. | |
2208 | * | |
2209 | * acpi_video_register() will report -ENODEV later as well due | |
2210 | * to acpi_disabled when i915.ko tries to register itself afterwards. | |
2211 | */ | |
2212 | if (acpi_disabled) | |
2213 | return 0; | |
2214 | ||
45cb50e6 ZR |
2215 | dmi_check_system(video_dmi_table); |
2216 | ||
74a365b3 MG |
2217 | if (intel_opregion_present()) |
2218 | return 0; | |
2219 | ||
2220 | return acpi_video_register(); | |
2221 | } | |
1da177e4 | 2222 | |
86e437f0 | 2223 | static void __exit acpi_video_exit(void) |
1da177e4 | 2224 | { |
86e437f0 | 2225 | acpi_video_unregister(); |
1da177e4 | 2226 | |
d550d98d | 2227 | return; |
1da177e4 LT |
2228 | } |
2229 | ||
2230 | module_init(acpi_video_init); | |
2231 | module_exit(acpi_video_exit); |