Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * video.c - ACPI Video Driver ($Revision:$) | |
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> |
1da177e4 | 40 | #include <asm/uaccess.h> |
eb27cae8 | 41 | #include <linux/dmi.h> |
1da177e4 LT |
42 | #include <acpi/acpi_bus.h> |
43 | #include <acpi/acpi_drivers.h> | |
ac7729da | 44 | #include <linux/suspend.h> |
e92a7162 | 45 | #include <acpi/video.h> |
1da177e4 | 46 | |
a192a958 LB |
47 | #define PREFIX "ACPI: " |
48 | ||
1da177e4 | 49 | #define ACPI_VIDEO_CLASS "video" |
1da177e4 LT |
50 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
51 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
52 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
53 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
54 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
55 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
56 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
57 | ||
f4715189 TT |
58 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
59 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
60 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
61 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
62 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 63 | |
2f3d000a | 64 | #define MAX_NAME_LEN 20 |
1da177e4 | 65 | |
1da177e4 | 66 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 67 | ACPI_MODULE_NAME("video"); |
1da177e4 | 68 | |
f52fd66d | 69 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 70 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
71 | MODULE_LICENSE("GPL"); |
72 | ||
8a681a4d ZR |
73 | static int brightness_switch_enabled = 1; |
74 | module_param(brightness_switch_enabled, bool, 0644); | |
75 | ||
c504f8cb ZR |
76 | /* |
77 | * By default, we don't allow duplicate ACPI video bus devices | |
78 | * under the same VGA controller | |
79 | */ | |
80 | static int allow_duplicates; | |
81 | module_param(allow_duplicates, bool, 0644); | |
82 | ||
99fd1895 ZR |
83 | /* |
84 | * Some BIOSes claim they use minimum backlight at boot, | |
85 | * and this may bring dimming screen after boot | |
86 | */ | |
87 | static int use_bios_initial_backlight = 1; | |
88 | module_param(use_bios_initial_backlight, bool, 0644); | |
89 | ||
86e437f0 | 90 | static int register_count = 0; |
4be44fcd LB |
91 | static int acpi_video_bus_add(struct acpi_device *device); |
92 | static int acpi_video_bus_remove(struct acpi_device *device, int type); | |
7015558f | 93 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
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 { | |
4be44fcd LB |
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 */ | |
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 */ | |
98fb8fe1 | 131 | u32 display_port_attachment:4; /*This field differentiates the display type */ |
4be44fcd | 132 | u32 display_type:4; /*Describe the specific type in use */ |
98fb8fe1 | 133 | u32 vendor_specific:4; /*Chipset Vendor Specific */ |
4be44fcd LB |
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 | |
136 | the VGA device. */ | |
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; |
4be44fcd | 152 | u8 dos_setting; |
1da177e4 | 153 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
154 | u8 attached_count; |
155 | struct acpi_video_bus_cap cap; | |
1da177e4 | 156 | struct acpi_video_bus_flags flags; |
4be44fcd | 157 | struct list_head video_device_list; |
bbac81f5 | 158 | struct mutex device_list_lock; /* protects video_device_list */ |
e9dab196 LY |
159 | struct input_dev *input; |
160 | char phys[32]; /* for input device */ | |
ac7729da | 161 | struct notifier_block pm_nb; |
1da177e4 LT |
162 | }; |
163 | ||
164 | struct acpi_video_device_flags { | |
4be44fcd LB |
165 | u8 crt:1; |
166 | u8 lcd:1; | |
167 | u8 tvout:1; | |
82cae999 | 168 | u8 dvi:1; |
4be44fcd LB |
169 | u8 bios:1; |
170 | u8 unknown:1; | |
82cae999 | 171 | u8 reserved:2; |
1da177e4 LT |
172 | }; |
173 | ||
174 | struct acpi_video_device_cap { | |
4be44fcd LB |
175 | u8 _ADR:1; /*Return the unique ID */ |
176 | u8 _BCL:1; /*Query list of brightness control levels supported */ | |
177 | u8 _BCM:1; /*Set the brightness level */ | |
2f3d000a | 178 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 179 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
4be44fcd | 180 | u8 _DDC:1; /*Return the EDID for this device */ |
1da177e4 LT |
181 | }; |
182 | ||
d32f6947 ZR |
183 | struct acpi_video_brightness_flags { |
184 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
d80fb99f | 185 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/ |
1a7c618a ZR |
186 | u8 _BCL_use_index:1; /* levels in _BCL are index values */ |
187 | u8 _BCM_use_index:1; /* input of _BCM is an index value */ | |
188 | u8 _BQC_use_index:1; /* _BQC returns an index value */ | |
d32f6947 ZR |
189 | }; |
190 | ||
1da177e4 | 191 | struct acpi_video_device_brightness { |
4be44fcd LB |
192 | int curr; |
193 | int count; | |
194 | int *levels; | |
d32f6947 | 195 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
196 | }; |
197 | ||
198 | struct acpi_video_device { | |
4be44fcd LB |
199 | unsigned long device_id; |
200 | struct acpi_video_device_flags flags; | |
201 | struct acpi_video_device_cap cap; | |
202 | struct list_head entry; | |
203 | struct acpi_video_bus *video; | |
204 | struct acpi_device *dev; | |
1da177e4 | 205 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 206 | struct backlight_device *backlight; |
4a703a8f | 207 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
208 | }; |
209 | ||
b7171ae7 | 210 | static const char device_decode[][30] = { |
1da177e4 LT |
211 | "motherboard VGA device", |
212 | "PCI VGA device", | |
213 | "AGP VGA device", | |
214 | "UNKNOWN", | |
215 | }; | |
216 | ||
4be44fcd LB |
217 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
218 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
219 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
220 | struct acpi_video_device *device); | |
1da177e4 | 221 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
222 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
223 | int level); | |
224 | static int acpi_video_device_lcd_get_level_current( | |
225 | struct acpi_video_device *device, | |
70287db8 | 226 | unsigned long long *level, int init); |
4be44fcd LB |
227 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
228 | u32 level_current, u32 event); | |
c8890f90 | 229 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 230 | int event); |
1da177e4 | 231 | |
2f3d000a YL |
232 | /*backlight device sysfs support*/ |
233 | static int acpi_video_get_brightness(struct backlight_device *bd) | |
234 | { | |
27663c58 | 235 | unsigned long long cur_level; |
38531e6f | 236 | int i; |
2f3d000a | 237 | struct acpi_video_device *vd = |
655bfd7a | 238 | (struct acpi_video_device *)bl_get_data(bd); |
c8890f90 | 239 | |
70287db8 | 240 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, 0)) |
c8890f90 | 241 | return -EINVAL; |
38531e6f MG |
242 | for (i = 2; i < vd->brightness->count; i++) { |
243 | if (vd->brightness->levels[i] == cur_level) | |
244 | /* The first two entries are special - see page 575 | |
245 | of the ACPI spec 3.0 */ | |
246 | return i-2; | |
247 | } | |
248 | return 0; | |
2f3d000a YL |
249 | } |
250 | ||
251 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
252 | { | |
24450c7a | 253 | int request_level = bd->props.brightness + 2; |
2f3d000a | 254 | struct acpi_video_device *vd = |
655bfd7a | 255 | (struct acpi_video_device *)bl_get_data(bd); |
24450c7a ZR |
256 | |
257 | return acpi_video_device_lcd_set_level(vd, | |
258 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
259 | } |
260 | ||
acc2472e | 261 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
262 | .get_brightness = acpi_video_get_brightness, |
263 | .update_status = acpi_video_set_brightness, | |
264 | }; | |
265 | ||
702ed512 | 266 | /* thermal cooling device callbacks */ |
4a703a8f | 267 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 268 | long *state) |
702ed512 | 269 | { |
4a703a8f | 270 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
271 | struct acpi_video_device *video = acpi_driver_data(device); |
272 | ||
6503e5df MG |
273 | *state = video->brightness->count - 3; |
274 | return 0; | |
702ed512 ZR |
275 | } |
276 | ||
4a703a8f | 277 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 278 | long *state) |
702ed512 | 279 | { |
4a703a8f | 280 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 281 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 282 | unsigned long long level; |
6503e5df | 283 | int offset; |
702ed512 | 284 | |
70287db8 | 285 | if (acpi_video_device_lcd_get_level_current(video, &level, 0)) |
c8890f90 | 286 | return -EINVAL; |
6503e5df MG |
287 | for (offset = 2; offset < video->brightness->count; offset++) |
288 | if (level == video->brightness->levels[offset]) { | |
289 | *state = video->brightness->count - offset - 1; | |
290 | return 0; | |
291 | } | |
702ed512 ZR |
292 | |
293 | return -EINVAL; | |
294 | } | |
295 | ||
296 | static int | |
4a703a8f | 297 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 298 | { |
4a703a8f | 299 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
300 | struct acpi_video_device *video = acpi_driver_data(device); |
301 | int level; | |
302 | ||
303 | if ( state >= video->brightness->count - 2) | |
304 | return -EINVAL; | |
305 | ||
306 | state = video->brightness->count - state; | |
307 | level = video->brightness->levels[state -1]; | |
308 | return acpi_video_device_lcd_set_level(video, level); | |
309 | } | |
310 | ||
311 | static struct thermal_cooling_device_ops video_cooling_ops = { | |
312 | .get_max_state = video_get_max_state, | |
313 | .get_cur_state = video_get_cur_state, | |
314 | .set_cur_state = video_set_cur_state, | |
315 | }; | |
316 | ||
1da177e4 LT |
317 | /* -------------------------------------------------------------------------- |
318 | Video Management | |
319 | -------------------------------------------------------------------------- */ | |
320 | ||
1da177e4 | 321 | static int |
4be44fcd LB |
322 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
323 | union acpi_object **levels) | |
1da177e4 | 324 | { |
4be44fcd LB |
325 | int status; |
326 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
327 | union acpi_object *obj; | |
1da177e4 | 328 | |
1da177e4 LT |
329 | |
330 | *levels = NULL; | |
331 | ||
90130268 | 332 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 333 | if (!ACPI_SUCCESS(status)) |
d550d98d | 334 | return status; |
4be44fcd | 335 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 336 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 337 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
338 | status = -EFAULT; |
339 | goto err; | |
340 | } | |
341 | ||
342 | *levels = obj; | |
343 | ||
d550d98d | 344 | return 0; |
1da177e4 | 345 | |
4be44fcd | 346 | err: |
6044ec88 | 347 | kfree(buffer.pointer); |
1da177e4 | 348 | |
d550d98d | 349 | return status; |
1da177e4 LT |
350 | } |
351 | ||
352 | static int | |
4be44fcd | 353 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 354 | { |
24450c7a | 355 | int status; |
4be44fcd LB |
356 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
357 | struct acpi_object_list args = { 1, &arg0 }; | |
9e6dada9 | 358 | int state; |
1da177e4 | 359 | |
1da177e4 | 360 | arg0.integer.value = level; |
1da177e4 | 361 | |
24450c7a ZR |
362 | status = acpi_evaluate_object(device->dev->handle, "_BCM", |
363 | &args, NULL); | |
364 | if (ACPI_FAILURE(status)) { | |
365 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
366 | return -EIO; | |
367 | } | |
368 | ||
4500ca8e | 369 | device->brightness->curr = level; |
9e6dada9 | 370 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 371 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
372 | if (device->backlight) |
373 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
374 | return 0; |
375 | } | |
9e6dada9 | 376 | |
24450c7a ZR |
377 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
378 | return -EINVAL; | |
1da177e4 LT |
379 | } |
380 | ||
45cb50e6 ZR |
381 | /* |
382 | * For some buggy _BQC methods, we need to add a constant value to | |
383 | * the _BQC return value to get the actual current brightness level | |
384 | */ | |
385 | ||
386 | static int bqc_offset_aml_bug_workaround; | |
387 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
388 | { | |
389 | bqc_offset_aml_bug_workaround = 9; | |
390 | return 0; | |
391 | } | |
392 | ||
393 | static struct dmi_system_id video_dmi_table[] __initdata = { | |
394 | /* | |
395 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
396 | */ | |
397 | { | |
398 | .callback = video_set_bqc_offset, | |
399 | .ident = "Acer Aspire 5720", | |
400 | .matches = { | |
401 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
402 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
403 | }, | |
404 | }, | |
5afc4abe LB |
405 | { |
406 | .callback = video_set_bqc_offset, | |
407 | .ident = "Acer Aspire 5710Z", | |
408 | .matches = { | |
409 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
410 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
411 | }, | |
412 | }, | |
34ac272b ZR |
413 | { |
414 | .callback = video_set_bqc_offset, | |
415 | .ident = "eMachines E510", | |
416 | .matches = { | |
417 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
418 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
419 | }, | |
420 | }, | |
93bcece2 ZR |
421 | { |
422 | .callback = video_set_bqc_offset, | |
423 | .ident = "Acer Aspire 5315", | |
424 | .matches = { | |
425 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
426 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
427 | }, | |
428 | }, | |
152a4e63 ZR |
429 | { |
430 | .callback = video_set_bqc_offset, | |
431 | .ident = "Acer Aspire 7720", | |
432 | .matches = { | |
433 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
434 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
435 | }, | |
436 | }, | |
45cb50e6 ZR |
437 | {} |
438 | }; | |
439 | ||
1da177e4 | 440 | static int |
4be44fcd | 441 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
70287db8 | 442 | unsigned long long *level, int init) |
1da177e4 | 443 | { |
c8890f90 | 444 | acpi_status status = AE_OK; |
4e231fa4 | 445 | int i; |
c8890f90 | 446 | |
c60d638e ZR |
447 | if (device->cap._BQC || device->cap._BCQ) { |
448 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
449 | ||
450 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
451 | NULL, level); |
452 | if (ACPI_SUCCESS(status)) { | |
1a7c618a ZR |
453 | if (device->brightness->flags._BQC_use_index) { |
454 | if (device->brightness->flags._BCL_reversed) | |
455 | *level = device->brightness->count | |
456 | - 3 - (*level); | |
457 | *level = device->brightness->levels[*level + 2]; | |
458 | ||
459 | } | |
45cb50e6 | 460 | *level += bqc_offset_aml_bug_workaround; |
4e231fa4 VS |
461 | for (i = 2; i < device->brightness->count; i++) |
462 | if (device->brightness->levels[i] == *level) { | |
463 | device->brightness->curr = *level; | |
464 | return 0; | |
465 | } | |
70287db8 MG |
466 | if (!init) { |
467 | /* | |
468 | * BQC returned an invalid level. | |
469 | * Stop using it. | |
470 | */ | |
471 | ACPI_WARNING((AE_INFO, | |
472 | "%s returned an invalid level", | |
473 | buf)); | |
474 | device->cap._BQC = device->cap._BCQ = 0; | |
475 | } | |
c8890f90 ZR |
476 | } else { |
477 | /* Fixme: | |
478 | * should we return an error or ignore this failure? | |
479 | * dev->brightness->curr is a cached value which stores | |
480 | * the correct current backlight level in most cases. | |
481 | * ACPI video backlight still works w/ buggy _BQC. | |
482 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
483 | */ | |
c60d638e ZR |
484 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
485 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
486 | } |
487 | } | |
488 | ||
4500ca8e | 489 | *level = device->brightness->curr; |
c8890f90 | 490 | return 0; |
1da177e4 LT |
491 | } |
492 | ||
493 | static int | |
4be44fcd LB |
494 | acpi_video_device_EDID(struct acpi_video_device *device, |
495 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 496 | { |
4be44fcd LB |
497 | int status; |
498 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
499 | union acpi_object *obj; | |
500 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
501 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 502 | |
1da177e4 LT |
503 | |
504 | *edid = NULL; | |
505 | ||
506 | if (!device) | |
d550d98d | 507 | return -ENODEV; |
1da177e4 LT |
508 | if (length == 128) |
509 | arg0.integer.value = 1; | |
510 | else if (length == 256) | |
511 | arg0.integer.value = 2; | |
512 | else | |
d550d98d | 513 | return -EINVAL; |
1da177e4 | 514 | |
90130268 | 515 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 516 | if (ACPI_FAILURE(status)) |
d550d98d | 517 | return -ENODEV; |
1da177e4 | 518 | |
50dd0969 | 519 | obj = buffer.pointer; |
1da177e4 LT |
520 | |
521 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
522 | *edid = obj; | |
523 | else { | |
6468463a | 524 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
525 | status = -EFAULT; |
526 | kfree(obj); | |
527 | } | |
528 | ||
d550d98d | 529 | return status; |
1da177e4 LT |
530 | } |
531 | ||
1da177e4 LT |
532 | /* bus */ |
533 | ||
1da177e4 LT |
534 | /* |
535 | * Arg: | |
536 | * video : video bus device pointer | |
537 | * bios_flag : | |
538 | * 0. The system BIOS should NOT automatically switch(toggle) | |
539 | * the active display output. | |
540 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 541 | * active display output. No switch event. |
1da177e4 LT |
542 | * 2. The _DGS value should be locked. |
543 | * 3. The system BIOS should not automatically switch (toggle) the | |
544 | * active display output, but instead generate the display switch | |
545 | * event notify code. | |
546 | * lcd_flag : | |
547 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 548 | * of the LCD when the power changes from AC to DC |
1da177e4 | 549 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 550 | * level of the LCD when the power changes from AC to DC. |
1da177e4 LT |
551 | * Return Value: |
552 | * -1 wrong arg. | |
553 | */ | |
554 | ||
555 | static int | |
4be44fcd | 556 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 557 | { |
439913ff | 558 | u64 status = 0; |
4be44fcd LB |
559 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
560 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 561 | |
1da177e4 | 562 | |
4be44fcd | 563 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) { |
1da177e4 LT |
564 | status = -1; |
565 | goto Failed; | |
566 | } | |
567 | arg0.integer.value = (lcd_flag << 2) | bios_flag; | |
568 | video->dos_setting = arg0.integer.value; | |
90130268 | 569 | acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL); |
1da177e4 | 570 | |
4be44fcd | 571 | Failed: |
d550d98d | 572 | return status; |
1da177e4 LT |
573 | } |
574 | ||
935e5f29 ZR |
575 | /* |
576 | * Simple comparison function used to sort backlight levels. | |
577 | */ | |
578 | ||
579 | static int | |
580 | acpi_video_cmp_level(const void *a, const void *b) | |
581 | { | |
582 | return *(int *)a - *(int *)b; | |
583 | } | |
584 | ||
1da177e4 LT |
585 | /* |
586 | * Arg: | |
587 | * device : video output device (LCD, CRT, ..) | |
588 | * | |
589 | * Return Value: | |
469778c1 JJ |
590 | * Maximum brightness level |
591 | * | |
592 | * Allocate and initialize device->brightness. | |
593 | */ | |
594 | ||
595 | static int | |
596 | acpi_video_init_brightness(struct acpi_video_device *device) | |
597 | { | |
598 | union acpi_object *obj = NULL; | |
d32f6947 | 599 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 600 | unsigned long long level, level_old; |
469778c1 JJ |
601 | union acpi_object *o; |
602 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 603 | int result = -EINVAL; |
469778c1 JJ |
604 | |
605 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
606 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
607 | "LCD brightness level\n")); | |
608 | goto out; | |
609 | } | |
610 | ||
611 | if (obj->package.count < 2) | |
612 | goto out; | |
613 | ||
614 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
615 | if (!br) { | |
616 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 617 | result = -ENOMEM; |
469778c1 JJ |
618 | goto out; |
619 | } | |
620 | ||
d32f6947 | 621 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 622 | GFP_KERNEL); |
1a7c618a ZR |
623 | if (!br->levels) { |
624 | result = -ENOMEM; | |
469778c1 | 625 | goto out_free; |
1a7c618a | 626 | } |
469778c1 JJ |
627 | |
628 | for (i = 0; i < obj->package.count; i++) { | |
629 | o = (union acpi_object *)&obj->package.elements[i]; | |
630 | if (o->type != ACPI_TYPE_INTEGER) { | |
631 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
632 | continue; | |
633 | } | |
634 | br->levels[count] = (u32) o->integer.value; | |
635 | ||
636 | if (br->levels[count] > max_level) | |
637 | max_level = br->levels[count]; | |
638 | count++; | |
639 | } | |
640 | ||
d32f6947 ZR |
641 | /* |
642 | * some buggy BIOS don't export the levels | |
643 | * when machine is on AC/Battery in _BCL package. | |
644 | * In this case, the first two elements in _BCL packages | |
645 | * are also supported brightness levels that OS should take care of. | |
646 | */ | |
90af2cf6 ZR |
647 | for (i = 2; i < count; i++) { |
648 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 649 | level_ac_battery++; |
90af2cf6 ZR |
650 | if (br->levels[i] == br->levels[1]) |
651 | level_ac_battery++; | |
652 | } | |
d32f6947 ZR |
653 | |
654 | if (level_ac_battery < 2) { | |
655 | level_ac_battery = 2 - level_ac_battery; | |
656 | br->flags._BCL_no_ac_battery_levels = 1; | |
657 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
658 | br->levels[i] = br->levels[i - level_ac_battery]; | |
659 | count += level_ac_battery; | |
660 | } else if (level_ac_battery > 2) | |
661 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n")); | |
662 | ||
d80fb99f ZR |
663 | /* Check if the _BCL package is in a reversed order */ |
664 | if (max_level == br->levels[2]) { | |
665 | br->flags._BCL_reversed = 1; | |
666 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
667 | acpi_video_cmp_level, NULL); | |
668 | } else if (max_level != br->levels[count - 1]) | |
669 | ACPI_ERROR((AE_INFO, | |
670 | "Found unordered _BCL package\n")); | |
469778c1 JJ |
671 | |
672 | br->count = count; | |
673 | device->brightness = br; | |
1a7c618a ZR |
674 | |
675 | /* Check the input/output of _BQC/_BCL/_BCM */ | |
676 | if ((max_level < 100) && (max_level <= (count - 2))) | |
677 | br->flags._BCL_use_index = 1; | |
678 | ||
679 | /* | |
680 | * _BCM is always consistent with _BCL, | |
681 | * at least for all the laptops we have ever seen. | |
682 | */ | |
683 | br->flags._BCM_use_index = br->flags._BCL_use_index; | |
684 | ||
685 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ | |
90c53ca4 | 686 | br->curr = level = max_level; |
e047cca6 ZR |
687 | |
688 | if (!device->cap._BQC) | |
689 | goto set_level; | |
690 | ||
70287db8 | 691 | result = acpi_video_device_lcd_get_level_current(device, &level_old, 1); |
1a7c618a ZR |
692 | if (result) |
693 | goto out_free_levels; | |
694 | ||
e047cca6 ZR |
695 | /* |
696 | * Set the level to maximum and check if _BQC uses indexed value | |
697 | */ | |
698 | result = acpi_video_device_lcd_set_level(device, max_level); | |
1a7c618a ZR |
699 | if (result) |
700 | goto out_free_levels; | |
701 | ||
70287db8 | 702 | result = acpi_video_device_lcd_get_level_current(device, &level, 0); |
1a7c618a ZR |
703 | if (result) |
704 | goto out_free_levels; | |
705 | ||
e047cca6 ZR |
706 | br->flags._BQC_use_index = (level == max_level ? 0 : 1); |
707 | ||
90c53ca4 ZR |
708 | if (!br->flags._BQC_use_index) { |
709 | /* | |
710 | * Set the backlight to the initial state. | |
711 | * On some buggy laptops, _BQC returns an uninitialized value | |
712 | * when invoked for the first time, i.e. level_old is invalid. | |
713 | * set the backlight to max_level in this case | |
714 | */ | |
99fd1895 ZR |
715 | if (use_bios_initial_backlight) { |
716 | for (i = 2; i < br->count; i++) | |
717 | if (level_old == br->levels[i]) | |
718 | level = level_old; | |
719 | } | |
e047cca6 | 720 | goto set_level; |
90c53ca4 | 721 | } |
e047cca6 ZR |
722 | |
723 | if (br->flags._BCL_reversed) | |
724 | level_old = (br->count - 1) - level_old; | |
90c53ca4 | 725 | level = br->levels[level_old]; |
e047cca6 ZR |
726 | |
727 | set_level: | |
90c53ca4 | 728 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
729 | if (result) |
730 | goto out_free_levels; | |
1a7c618a | 731 | |
d32f6947 ZR |
732 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
733 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 734 | kfree(obj); |
1a7c618a | 735 | return result; |
469778c1 JJ |
736 | |
737 | out_free_levels: | |
738 | kfree(br->levels); | |
739 | out_free: | |
740 | kfree(br); | |
741 | out: | |
742 | device->brightness = NULL; | |
743 | kfree(obj); | |
1a7c618a | 744 | return result; |
469778c1 JJ |
745 | } |
746 | ||
747 | /* | |
748 | * Arg: | |
749 | * device : video output device (LCD, CRT, ..) | |
750 | * | |
751 | * Return Value: | |
1da177e4 LT |
752 | * None |
753 | * | |
98fb8fe1 | 754 | * Find out all required AML methods defined under the output |
1da177e4 LT |
755 | * device. |
756 | */ | |
757 | ||
4be44fcd | 758 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 759 | { |
1da177e4 | 760 | acpi_handle h_dummy1; |
1da177e4 | 761 | |
90130268 | 762 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { |
1da177e4 LT |
763 | device->cap._ADR = 1; |
764 | } | |
90130268 | 765 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) { |
4be44fcd | 766 | device->cap._BCL = 1; |
1da177e4 | 767 | } |
90130268 | 768 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) { |
4be44fcd | 769 | device->cap._BCM = 1; |
1da177e4 | 770 | } |
2f3d000a YL |
771 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1))) |
772 | device->cap._BQC = 1; | |
c60d638e ZR |
773 | else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ", |
774 | &h_dummy1))) { | |
775 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); | |
776 | device->cap._BCQ = 1; | |
777 | } | |
778 | ||
90130268 | 779 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { |
4be44fcd | 780 | device->cap._DDC = 1; |
1da177e4 | 781 | } |
1da177e4 | 782 | |
1a7c618a | 783 | if (acpi_video_backlight_support()) { |
a19a6ee6 | 784 | struct backlight_properties props; |
9661e92c MG |
785 | struct pci_dev *pdev; |
786 | acpi_handle acpi_parent; | |
787 | struct device *parent = NULL; | |
702ed512 | 788 | int result; |
2f3d000a YL |
789 | static int count = 0; |
790 | char *name; | |
1a7c618a ZR |
791 | |
792 | result = acpi_video_init_brightness(device); | |
793 | if (result) | |
794 | return; | |
aeb834d9 | 795 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
2f3d000a YL |
796 | if (!name) |
797 | return; | |
aeb834d9 | 798 | count++; |
2f3d000a | 799 | |
9661e92c MG |
800 | acpi_get_parent(device->dev->handle, &acpi_parent); |
801 | ||
802 | pdev = acpi_get_pci_dev(acpi_parent); | |
803 | if (pdev) { | |
804 | parent = &pdev->dev; | |
805 | pci_dev_put(pdev); | |
806 | } | |
807 | ||
a19a6ee6 | 808 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 809 | props.type = BACKLIGHT_FIRMWARE; |
a19a6ee6 | 810 | props.max_brightness = device->brightness->count - 3; |
9661e92c MG |
811 | device->backlight = backlight_device_register(name, |
812 | parent, | |
813 | device, | |
a19a6ee6 MG |
814 | &acpi_backlight_ops, |
815 | &props); | |
2f3d000a | 816 | kfree(name); |
e01ce79b ZR |
817 | if (IS_ERR(device->backlight)) |
818 | return; | |
702ed512 | 819 | |
ac7729da RW |
820 | /* |
821 | * Save current brightness level in case we have to restore it | |
822 | * before acpi_video_device_lcd_set_level() is called next time. | |
823 | */ | |
824 | device->backlight->props.brightness = | |
825 | acpi_video_get_brightness(device->backlight); | |
702ed512 | 826 | |
4a703a8f | 827 | device->cooling_dev = thermal_cooling_device_register("LCD", |
702ed512 | 828 | device->dev, &video_cooling_ops); |
4a703a8f | 829 | if (IS_ERR(device->cooling_dev)) { |
4b4fe3b6 | 830 | /* |
4a703a8f | 831 | * Set cooling_dev to NULL so we don't crash trying to |
4b4fe3b6 DT |
832 | * free it. |
833 | * Also, why the hell we are returning early and | |
834 | * not attempt to register video output if cooling | |
835 | * device registration failed? | |
836 | * -- dtor | |
837 | */ | |
4a703a8f | 838 | device->cooling_dev = NULL; |
43ff39f2 | 839 | return; |
4b4fe3b6 | 840 | } |
43ff39f2 | 841 | |
fc3a8828 | 842 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
4a703a8f | 843 | device->cooling_dev->id); |
9030062f | 844 | result = sysfs_create_link(&device->dev->dev.kobj, |
4a703a8f | 845 | &device->cooling_dev->device.kobj, |
9030062f JL |
846 | "thermal_cooling"); |
847 | if (result) | |
848 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
4a703a8f | 849 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
9030062f JL |
850 | &device->dev->dev.kobj, "device"); |
851 | if (result) | |
852 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
853 | ||
2f3d000a | 854 | } |
1da177e4 LT |
855 | } |
856 | ||
857 | /* | |
858 | * Arg: | |
859 | * device : video output device (VGA) | |
860 | * | |
861 | * Return Value: | |
862 | * None | |
863 | * | |
98fb8fe1 | 864 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
865 | */ |
866 | ||
4be44fcd | 867 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 868 | { |
4be44fcd | 869 | acpi_handle h_dummy1; |
1da177e4 | 870 | |
90130268 | 871 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { |
1da177e4 LT |
872 | video->cap._DOS = 1; |
873 | } | |
90130268 | 874 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { |
1da177e4 LT |
875 | video->cap._DOD = 1; |
876 | } | |
90130268 | 877 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { |
1da177e4 LT |
878 | video->cap._ROM = 1; |
879 | } | |
90130268 | 880 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { |
1da177e4 LT |
881 | video->cap._GPD = 1; |
882 | } | |
90130268 | 883 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { |
1da177e4 LT |
884 | video->cap._SPD = 1; |
885 | } | |
90130268 | 886 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) { |
1da177e4 LT |
887 | video->cap._VPO = 1; |
888 | } | |
889 | } | |
890 | ||
891 | /* | |
892 | * Check whether the video bus device has required AML method to | |
893 | * support the desired features | |
894 | */ | |
895 | ||
4be44fcd | 896 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 897 | { |
4be44fcd | 898 | acpi_status status = -ENOENT; |
1e4cffe7 | 899 | struct pci_dev *dev; |
1da177e4 LT |
900 | |
901 | if (!video) | |
d550d98d | 902 | return -EINVAL; |
1da177e4 | 903 | |
1e4cffe7 | 904 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
905 | if (!dev) |
906 | return -ENODEV; | |
1e4cffe7 | 907 | pci_dev_put(dev); |
22c13f9d | 908 | |
1da177e4 LT |
909 | /* Since there is no HID, CID and so on for VGA driver, we have |
910 | * to check well known required nodes. | |
911 | */ | |
912 | ||
98fb8fe1 | 913 | /* Does this device support video switching? */ |
3a1151e3 SB |
914 | if (video->cap._DOS || video->cap._DOD) { |
915 | if (!video->cap._DOS) { | |
916 | printk(KERN_WARNING FW_BUG | |
917 | "ACPI(%s) defines _DOD but not _DOS\n", | |
918 | acpi_device_bid(video->device)); | |
919 | } | |
1da177e4 LT |
920 | video->flags.multihead = 1; |
921 | status = 0; | |
922 | } | |
923 | ||
98fb8fe1 | 924 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 925 | if (video->cap._ROM) { |
1da177e4 LT |
926 | video->flags.rom = 1; |
927 | status = 0; | |
928 | } | |
929 | ||
98fb8fe1 | 930 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 931 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
932 | video->flags.post = 1; |
933 | status = 0; | |
934 | } | |
935 | ||
d550d98d | 936 | return status; |
1da177e4 LT |
937 | } |
938 | ||
1da177e4 LT |
939 | /* -------------------------------------------------------------------------- |
940 | Driver Interface | |
941 | -------------------------------------------------------------------------- */ | |
942 | ||
943 | /* device interface */ | |
82cae999 RZ |
944 | static struct acpi_video_device_attrib* |
945 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) | |
946 | { | |
78eed028 DT |
947 | struct acpi_video_enumerated_device *ids; |
948 | int i; | |
949 | ||
950 | for (i = 0; i < video->attached_count; i++) { | |
951 | ids = &video->attached_array[i]; | |
952 | if ((ids->value.int_val & 0xffff) == device_id) | |
953 | return &ids->value.attrib; | |
954 | } | |
82cae999 | 955 | |
82cae999 RZ |
956 | return NULL; |
957 | } | |
1da177e4 | 958 | |
e92a7162 MG |
959 | static int |
960 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
961 | unsigned long device_id) | |
962 | { | |
963 | struct acpi_video_enumerated_device *ids; | |
964 | int i; | |
965 | ||
966 | for (i = 0; i < video->attached_count; i++) { | |
967 | ids = &video->attached_array[i]; | |
968 | if ((ids->value.int_val & 0xffff) == device_id) | |
969 | return ids->value.int_val; | |
970 | } | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
1da177e4 | 975 | static int |
4be44fcd LB |
976 | acpi_video_bus_get_one_device(struct acpi_device *device, |
977 | struct acpi_video_bus *video) | |
1da177e4 | 978 | { |
27663c58 | 979 | unsigned long long device_id; |
e92a7162 | 980 | int status, device_type; |
4be44fcd | 981 | struct acpi_video_device *data; |
82cae999 | 982 | struct acpi_video_device_attrib* attribute; |
1da177e4 LT |
983 | |
984 | if (!device || !video) | |
d550d98d | 985 | return -EINVAL; |
1da177e4 | 986 | |
4be44fcd LB |
987 | status = |
988 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
1da177e4 LT |
989 | if (ACPI_SUCCESS(status)) { |
990 | ||
36bcbec7 | 991 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1da177e4 | 992 | if (!data) |
d550d98d | 993 | return -ENOMEM; |
1da177e4 | 994 | |
1da177e4 LT |
995 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
996 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 997 | device->driver_data = data; |
1da177e4 LT |
998 | |
999 | data->device_id = device_id; | |
1000 | data->video = video; | |
1001 | data->dev = device; | |
1002 | ||
82cae999 RZ |
1003 | attribute = acpi_video_get_device_attr(video, device_id); |
1004 | ||
1005 | if((attribute != NULL) && attribute->device_id_scheme) { | |
1006 | switch (attribute->display_type) { | |
1007 | case ACPI_VIDEO_DISPLAY_CRT: | |
1008 | data->flags.crt = 1; | |
1009 | break; | |
1010 | case ACPI_VIDEO_DISPLAY_TV: | |
1011 | data->flags.tvout = 1; | |
1012 | break; | |
1013 | case ACPI_VIDEO_DISPLAY_DVI: | |
1014 | data->flags.dvi = 1; | |
1015 | break; | |
1016 | case ACPI_VIDEO_DISPLAY_LCD: | |
1017 | data->flags.lcd = 1; | |
1018 | break; | |
1019 | default: | |
1020 | data->flags.unknown = 1; | |
1021 | break; | |
1022 | } | |
1023 | if(attribute->bios_can_detect) | |
1024 | data->flags.bios = 1; | |
e92a7162 MG |
1025 | } else { |
1026 | /* Check for legacy IDs */ | |
1027 | device_type = acpi_video_get_device_type(video, | |
1028 | device_id); | |
1029 | /* Ignore bits 16 and 18-20 */ | |
1030 | switch (device_type & 0xffe2ffff) { | |
1031 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: | |
1032 | data->flags.crt = 1; | |
1033 | break; | |
1034 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1035 | data->flags.lcd = 1; | |
1036 | break; | |
1037 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1038 | data->flags.tvout = 1; | |
1039 | break; | |
1040 | default: | |
1041 | data->flags.unknown = 1; | |
1042 | } | |
1043 | } | |
4be44fcd | 1044 | |
1da177e4 LT |
1045 | acpi_video_device_bind(video, data); |
1046 | acpi_video_device_find_cap(data); | |
1047 | ||
90130268 | 1048 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1049 | ACPI_DEVICE_NOTIFY, |
1050 | acpi_video_device_notify, | |
1051 | data); | |
1da177e4 | 1052 | if (ACPI_FAILURE(status)) { |
55ac9a01 LM |
1053 | printk(KERN_ERR PREFIX |
1054 | "Error installing notify handler\n"); | |
973bf491 YL |
1055 | if(data->brightness) |
1056 | kfree(data->brightness->levels); | |
1057 | kfree(data->brightness); | |
1058 | kfree(data); | |
1059 | return -ENODEV; | |
1da177e4 LT |
1060 | } |
1061 | ||
bbac81f5 | 1062 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1063 | list_add_tail(&data->entry, &video->video_device_list); |
bbac81f5 | 1064 | mutex_unlock(&video->device_list_lock); |
1da177e4 | 1065 | |
d550d98d | 1066 | return 0; |
1da177e4 LT |
1067 | } |
1068 | ||
d550d98d | 1069 | return -ENOENT; |
1da177e4 LT |
1070 | } |
1071 | ||
1072 | /* | |
1073 | * Arg: | |
1074 | * video : video bus device | |
1075 | * | |
1076 | * Return: | |
1077 | * none | |
1078 | * | |
1079 | * Enumerate the video device list of the video bus, | |
1080 | * bind the ids with the corresponding video devices | |
1081 | * under the video bus. | |
4be44fcd | 1082 | */ |
1da177e4 | 1083 | |
4be44fcd | 1084 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1085 | { |
ff102ea9 DT |
1086 | struct acpi_video_device *dev; |
1087 | ||
bbac81f5 | 1088 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1089 | |
1090 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1091 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1092 | |
bbac81f5 | 1093 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1094 | } |
1095 | ||
1096 | /* | |
1097 | * Arg: | |
1098 | * video : video bus device | |
1099 | * device : video output device under the video | |
1100 | * bus | |
1101 | * | |
1102 | * Return: | |
1103 | * none | |
1104 | * | |
1105 | * Bind the ids with the corresponding video devices | |
1106 | * under the video bus. | |
4be44fcd | 1107 | */ |
1da177e4 LT |
1108 | |
1109 | static void | |
4be44fcd LB |
1110 | acpi_video_device_bind(struct acpi_video_bus *video, |
1111 | struct acpi_video_device *device) | |
1da177e4 | 1112 | { |
78eed028 | 1113 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1114 | int i; |
1da177e4 | 1115 | |
78eed028 DT |
1116 | for (i = 0; i < video->attached_count; i++) { |
1117 | ids = &video->attached_array[i]; | |
1118 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1119 | ids->bind_info = device; | |
1da177e4 LT |
1120 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1121 | } | |
1122 | } | |
1da177e4 LT |
1123 | } |
1124 | ||
1125 | /* | |
1126 | * Arg: | |
1127 | * video : video bus device | |
1128 | * | |
1129 | * Return: | |
1130 | * < 0 : error | |
1131 | * | |
1132 | * Call _DOD to enumerate all devices attached to display adapter | |
1133 | * | |
4be44fcd | 1134 | */ |
1da177e4 LT |
1135 | |
1136 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1137 | { | |
4be44fcd LB |
1138 | int status; |
1139 | int count; | |
1140 | int i; | |
78eed028 | 1141 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1142 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1143 | union acpi_object *dod = NULL; | |
1144 | union acpi_object *obj; | |
1da177e4 | 1145 | |
90130268 | 1146 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1147 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1148 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1149 | return status; |
1da177e4 LT |
1150 | } |
1151 | ||
50dd0969 | 1152 | dod = buffer.pointer; |
1da177e4 | 1153 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1154 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1155 | status = -EFAULT; |
1156 | goto out; | |
1157 | } | |
1158 | ||
1159 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1160 | dod->package.count)); |
1da177e4 | 1161 | |
78eed028 DT |
1162 | active_list = kcalloc(1 + dod->package.count, |
1163 | sizeof(struct acpi_video_enumerated_device), | |
1164 | GFP_KERNEL); | |
1165 | if (!active_list) { | |
1da177e4 LT |
1166 | status = -ENOMEM; |
1167 | goto out; | |
1168 | } | |
1169 | ||
1170 | count = 0; | |
1171 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1172 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1173 | |
1174 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1175 | printk(KERN_ERR PREFIX |
1176 | "Invalid _DOD data in element %d\n", i); | |
1177 | continue; | |
1da177e4 | 1178 | } |
78eed028 DT |
1179 | |
1180 | active_list[count].value.int_val = obj->integer.value; | |
1181 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1182 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1183 | (int)obj->integer.value)); | |
1da177e4 LT |
1184 | count++; |
1185 | } | |
1da177e4 | 1186 | |
6044ec88 | 1187 | kfree(video->attached_array); |
4be44fcd | 1188 | |
78eed028 | 1189 | video->attached_array = active_list; |
1da177e4 | 1190 | video->attached_count = count; |
78eed028 DT |
1191 | |
1192 | out: | |
02438d87 | 1193 | kfree(buffer.pointer); |
d550d98d | 1194 | return status; |
1da177e4 LT |
1195 | } |
1196 | ||
4be44fcd LB |
1197 | static int |
1198 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1199 | u32 level_current, u32 event) | |
1da177e4 | 1200 | { |
63f0edfc | 1201 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1202 | max = max_below = 0; |
1203 | min = min_above = 255; | |
63f0edfc | 1204 | /* Find closest level to level_current */ |
0a3db1ce | 1205 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1206 | l = device->brightness->levels[i]; |
1207 | if (abs(l - level_current) < abs(delta)) { | |
1208 | delta = l - level_current; | |
1209 | if (!delta) | |
1210 | break; | |
1211 | } | |
1212 | } | |
1213 | /* Ajust level_current to closest available level */ | |
1214 | level_current += delta; | |
0a3db1ce | 1215 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1216 | l = device->brightness->levels[i]; |
1217 | if (l < min) | |
1218 | min = l; | |
1219 | if (l > max) | |
1220 | max = l; | |
1221 | if (l < min_above && l > level_current) | |
1222 | min_above = l; | |
1223 | if (l > max_below && l < level_current) | |
1224 | max_below = l; | |
1225 | } | |
1226 | ||
1227 | switch (event) { | |
1228 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1229 | return (level_current < max) ? min_above : min; | |
1230 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1231 | return (level_current < max) ? min_above : max; | |
1232 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1233 | return (level_current > min) ? max_below : min; | |
1234 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1235 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1236 | return 0; | |
1237 | default: | |
1238 | return level_current; | |
1239 | } | |
1da177e4 LT |
1240 | } |
1241 | ||
c8890f90 | 1242 | static int |
4be44fcd | 1243 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1244 | { |
27663c58 | 1245 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1246 | int result = -EINVAL; |
1247 | ||
28c32e99 ZR |
1248 | /* no warning message if acpi_backlight=vendor is used */ |
1249 | if (!acpi_video_backlight_support()) | |
1250 | return 0; | |
1251 | ||
469778c1 | 1252 | if (!device->brightness) |
c8890f90 ZR |
1253 | goto out; |
1254 | ||
1255 | result = acpi_video_device_lcd_get_level_current(device, | |
70287db8 | 1256 | &level_current, 0); |
c8890f90 ZR |
1257 | if (result) |
1258 | goto out; | |
1259 | ||
1da177e4 | 1260 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1261 | |
24450c7a | 1262 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1263 | |
36342742 MG |
1264 | if (!result) |
1265 | backlight_force_update(device->backlight, | |
1266 | BACKLIGHT_UPDATE_HOTKEY); | |
1267 | ||
c8890f90 ZR |
1268 | out: |
1269 | if (result) | |
1270 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1271 | ||
1272 | return result; | |
1da177e4 LT |
1273 | } |
1274 | ||
e92a7162 MG |
1275 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1276 | void **edid) | |
1277 | { | |
1278 | struct acpi_video_bus *video; | |
1279 | struct acpi_video_device *video_device; | |
1280 | union acpi_object *buffer = NULL; | |
1281 | acpi_status status; | |
1282 | int i, length; | |
1283 | ||
1284 | if (!device || !acpi_driver_data(device)) | |
1285 | return -EINVAL; | |
1286 | ||
1287 | video = acpi_driver_data(device); | |
1288 | ||
1289 | for (i = 0; i < video->attached_count; i++) { | |
1290 | video_device = video->attached_array[i].bind_info; | |
1291 | length = 256; | |
1292 | ||
1293 | if (!video_device) | |
1294 | continue; | |
1295 | ||
82069552 ZR |
1296 | if (!video_device->cap._DDC) |
1297 | continue; | |
1298 | ||
e92a7162 MG |
1299 | if (type) { |
1300 | switch (type) { | |
1301 | case ACPI_VIDEO_DISPLAY_CRT: | |
1302 | if (!video_device->flags.crt) | |
1303 | continue; | |
1304 | break; | |
1305 | case ACPI_VIDEO_DISPLAY_TV: | |
1306 | if (!video_device->flags.tvout) | |
1307 | continue; | |
1308 | break; | |
1309 | case ACPI_VIDEO_DISPLAY_DVI: | |
1310 | if (!video_device->flags.dvi) | |
1311 | continue; | |
1312 | break; | |
1313 | case ACPI_VIDEO_DISPLAY_LCD: | |
1314 | if (!video_device->flags.lcd) | |
1315 | continue; | |
1316 | break; | |
1317 | } | |
1318 | } else if (video_device->device_id != device_id) { | |
1319 | continue; | |
1320 | } | |
1321 | ||
1322 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1323 | ||
1324 | if (ACPI_FAILURE(status) || !buffer || | |
1325 | buffer->type != ACPI_TYPE_BUFFER) { | |
1326 | length = 128; | |
1327 | status = acpi_video_device_EDID(video_device, &buffer, | |
1328 | length); | |
1329 | if (ACPI_FAILURE(status) || !buffer || | |
1330 | buffer->type != ACPI_TYPE_BUFFER) { | |
1331 | continue; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | *edid = buffer->buffer.pointer; | |
1336 | return length; | |
1337 | } | |
1338 | ||
1339 | return -ENODEV; | |
1340 | } | |
1341 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1342 | ||
1da177e4 | 1343 | static int |
4be44fcd LB |
1344 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1345 | struct acpi_device *device) | |
1da177e4 | 1346 | { |
4be44fcd | 1347 | int status = 0; |
ff102ea9 | 1348 | struct acpi_device *dev; |
1da177e4 LT |
1349 | |
1350 | acpi_video_device_enumerate(video); | |
1351 | ||
ff102ea9 | 1352 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1353 | |
1354 | status = acpi_video_bus_get_one_device(dev, video); | |
1355 | if (ACPI_FAILURE(status)) { | |
55ac9a01 | 1356 | printk(KERN_WARNING PREFIX |
25985edc | 1357 | "Can't attach device\n"); |
1da177e4 LT |
1358 | continue; |
1359 | } | |
1da177e4 | 1360 | } |
d550d98d | 1361 | return status; |
1da177e4 LT |
1362 | } |
1363 | ||
4be44fcd | 1364 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
1da177e4 | 1365 | { |
031ec77b | 1366 | acpi_status status; |
1da177e4 LT |
1367 | |
1368 | if (!device || !device->video) | |
d550d98d | 1369 | return -ENOENT; |
1da177e4 | 1370 | |
90130268 | 1371 | status = acpi_remove_notify_handler(device->dev->handle, |
4be44fcd LB |
1372 | ACPI_DEVICE_NOTIFY, |
1373 | acpi_video_device_notify); | |
cfa806f0 AK |
1374 | if (ACPI_FAILURE(status)) { |
1375 | printk(KERN_WARNING PREFIX | |
25985edc | 1376 | "Can't remove video notify handler\n"); |
cfa806f0 | 1377 | } |
e29b3ee3 | 1378 | if (device->backlight) { |
e29b3ee3 KP |
1379 | backlight_device_unregister(device->backlight); |
1380 | device->backlight = NULL; | |
1381 | } | |
4a703a8f | 1382 | if (device->cooling_dev) { |
702ed512 ZR |
1383 | sysfs_remove_link(&device->dev->dev.kobj, |
1384 | "thermal_cooling"); | |
4a703a8f | 1385 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
702ed512 | 1386 | "device"); |
4a703a8f DT |
1387 | thermal_cooling_device_unregister(device->cooling_dev); |
1388 | device->cooling_dev = NULL; | |
702ed512 | 1389 | } |
ff102ea9 | 1390 | |
d550d98d | 1391 | return 0; |
1da177e4 LT |
1392 | } |
1393 | ||
4be44fcd | 1394 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1da177e4 | 1395 | { |
4be44fcd | 1396 | int status; |
ff102ea9 | 1397 | struct acpi_video_device *dev, *next; |
1da177e4 | 1398 | |
bbac81f5 | 1399 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1400 | |
ff102ea9 | 1401 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
1da177e4 | 1402 | |
ff102ea9 | 1403 | status = acpi_video_bus_put_one_device(dev); |
4be44fcd LB |
1404 | if (ACPI_FAILURE(status)) |
1405 | printk(KERN_WARNING PREFIX | |
1406 | "hhuuhhuu bug in acpi video driver.\n"); | |
1da177e4 | 1407 | |
ff102ea9 DT |
1408 | if (dev->brightness) { |
1409 | kfree(dev->brightness->levels); | |
1410 | kfree(dev->brightness); | |
1411 | } | |
1412 | list_del(&dev->entry); | |
1413 | kfree(dev); | |
1da177e4 LT |
1414 | } |
1415 | ||
bbac81f5 | 1416 | mutex_unlock(&video->device_list_lock); |
ff102ea9 | 1417 | |
d550d98d | 1418 | return 0; |
1da177e4 LT |
1419 | } |
1420 | ||
1421 | /* acpi_video interface */ | |
1422 | ||
4be44fcd | 1423 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1424 | { |
a21101c4 | 1425 | return acpi_video_bus_DOS(video, 0, 0); |
1da177e4 LT |
1426 | } |
1427 | ||
4be44fcd | 1428 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 LT |
1429 | { |
1430 | return acpi_video_bus_DOS(video, 0, 1); | |
1431 | } | |
1432 | ||
7015558f | 1433 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1434 | { |
7015558f | 1435 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1436 | struct input_dev *input; |
17c452f9 | 1437 | int keycode = 0; |
e9dab196 | 1438 | |
1da177e4 | 1439 | if (!video) |
d550d98d | 1440 | return; |
1da177e4 | 1441 | |
e9dab196 | 1442 | input = video->input; |
1da177e4 LT |
1443 | |
1444 | switch (event) { | |
98fb8fe1 | 1445 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1446 | * most likely via hotkey. */ |
14e04fb3 | 1447 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1448 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1449 | break; |
1450 | ||
98fb8fe1 | 1451 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1452 | * connector. */ |
1453 | acpi_video_device_enumerate(video); | |
1454 | acpi_video_device_rebind(video); | |
14e04fb3 | 1455 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1456 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1457 | break; |
1458 | ||
4be44fcd | 1459 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
25c87f7f | 1460 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1461 | keycode = KEY_SWITCHVIDEOMODE; |
1462 | break; | |
4be44fcd | 1463 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
25c87f7f | 1464 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1465 | keycode = KEY_VIDEO_NEXT; |
1466 | break; | |
4be44fcd | 1467 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
14e04fb3 | 1468 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1469 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1470 | break; |
1471 | ||
1472 | default: | |
1473 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1474 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1475 | break; |
1476 | } | |
1477 | ||
7761f638 | 1478 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1479 | |
1480 | if (keycode) { | |
1481 | input_report_key(input, keycode, 1); | |
1482 | input_sync(input); | |
1483 | input_report_key(input, keycode, 0); | |
1484 | input_sync(input); | |
1485 | } | |
e9dab196 | 1486 | |
d550d98d | 1487 | return; |
1da177e4 LT |
1488 | } |
1489 | ||
4be44fcd | 1490 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1491 | { |
50dd0969 | 1492 | struct acpi_video_device *video_device = data; |
4be44fcd | 1493 | struct acpi_device *device = NULL; |
e9dab196 LY |
1494 | struct acpi_video_bus *bus; |
1495 | struct input_dev *input; | |
17c452f9 | 1496 | int keycode = 0; |
1da177e4 | 1497 | |
1da177e4 | 1498 | if (!video_device) |
d550d98d | 1499 | return; |
1da177e4 | 1500 | |
e6afa0de | 1501 | device = video_device->dev; |
e9dab196 LY |
1502 | bus = video_device->video; |
1503 | input = bus->input; | |
1da177e4 LT |
1504 | |
1505 | switch (event) { | |
4be44fcd | 1506 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1507 | if (brightness_switch_enabled) |
1508 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1509 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1510 | keycode = KEY_BRIGHTNESS_CYCLE; |
1511 | break; | |
4be44fcd | 1512 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1513 | if (brightness_switch_enabled) |
1514 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1515 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1516 | keycode = KEY_BRIGHTNESSUP; |
1517 | break; | |
4be44fcd | 1518 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1519 | if (brightness_switch_enabled) |
1520 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1521 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1522 | keycode = KEY_BRIGHTNESSDOWN; |
1523 | break; | |
4be44fcd | 1524 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */ |
8a681a4d ZR |
1525 | if (brightness_switch_enabled) |
1526 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1527 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1528 | keycode = KEY_BRIGHTNESS_ZERO; |
1529 | break; | |
4be44fcd | 1530 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1531 | if (brightness_switch_enabled) |
1532 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1533 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1534 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1535 | break; |
1536 | default: | |
1537 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1538 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1539 | break; |
1540 | } | |
e9dab196 | 1541 | |
7761f638 | 1542 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1543 | |
1544 | if (keycode) { | |
1545 | input_report_key(input, keycode, 1); | |
1546 | input_sync(input); | |
1547 | input_report_key(input, keycode, 0); | |
1548 | input_sync(input); | |
1549 | } | |
e9dab196 | 1550 | |
d550d98d | 1551 | return; |
1da177e4 LT |
1552 | } |
1553 | ||
ac7729da RW |
1554 | static int acpi_video_resume(struct notifier_block *nb, |
1555 | unsigned long val, void *ign) | |
863c1490 MG |
1556 | { |
1557 | struct acpi_video_bus *video; | |
1558 | struct acpi_video_device *video_device; | |
1559 | int i; | |
1560 | ||
ac7729da RW |
1561 | switch (val) { |
1562 | case PM_HIBERNATION_PREPARE: | |
1563 | case PM_SUSPEND_PREPARE: | |
1564 | case PM_RESTORE_PREPARE: | |
1565 | return NOTIFY_DONE; | |
1566 | } | |
863c1490 | 1567 | |
ac7729da RW |
1568 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1569 | ||
1570 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1571 | |
1572 | for (i = 0; i < video->attached_count; i++) { | |
1573 | video_device = video->attached_array[i].bind_info; | |
1574 | if (video_device && video_device->backlight) | |
1575 | acpi_video_set_brightness(video_device->backlight); | |
1576 | } | |
ac7729da RW |
1577 | |
1578 | return NOTIFY_OK; | |
863c1490 MG |
1579 | } |
1580 | ||
c504f8cb ZR |
1581 | static acpi_status |
1582 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1583 | void **return_value) | |
1584 | { | |
1585 | struct acpi_device *device = context; | |
1586 | struct acpi_device *sibling; | |
1587 | int result; | |
1588 | ||
1589 | if (handle == device->handle) | |
1590 | return AE_CTRL_TERMINATE; | |
1591 | ||
1592 | result = acpi_bus_get_device(handle, &sibling); | |
1593 | if (result) | |
1594 | return AE_OK; | |
1595 | ||
1596 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1597 | return AE_ALREADY_EXISTS; | |
1598 | ||
1599 | return AE_OK; | |
1600 | } | |
1601 | ||
ac7729da RW |
1602 | static int instance; |
1603 | ||
4be44fcd | 1604 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1605 | { |
f51e8391 | 1606 | struct acpi_video_bus *video; |
e9dab196 | 1607 | struct input_dev *input; |
f51e8391 | 1608 | int error; |
c504f8cb ZR |
1609 | acpi_status status; |
1610 | ||
1611 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1612 | device->parent->handle, 1, | |
1613 | acpi_video_bus_match, NULL, | |
1614 | device, NULL); | |
1615 | if (status == AE_ALREADY_EXISTS) { | |
1616 | printk(KERN_WARNING FW_BUG | |
1617 | "Duplicate ACPI video bus devices for the" | |
1618 | " same VGA controller, please try module " | |
1619 | "parameter \"video.allow_duplicates=1\"" | |
1620 | "if the current driver doesn't work.\n"); | |
1621 | if (!allow_duplicates) | |
1622 | return -ENODEV; | |
1623 | } | |
1da177e4 | 1624 | |
36bcbec7 | 1625 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1626 | if (!video) |
d550d98d | 1627 | return -ENOMEM; |
1da177e4 | 1628 | |
e6d9da1d ZR |
1629 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1630 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1631 | if (instance) | |
1632 | device->pnp.bus_id[3] = '0' + instance; | |
1633 | instance ++; | |
1634 | } | |
f3b39f13 ZY |
1635 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1636 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1637 | if (instance) | |
1638 | device->pnp.bus_id[3] = '0' + instance; | |
1639 | instance++; | |
1640 | } | |
e6d9da1d | 1641 | |
e6afa0de | 1642 | video->device = device; |
1da177e4 LT |
1643 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1644 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1645 | device->driver_data = video; |
1da177e4 LT |
1646 | |
1647 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1648 | error = acpi_video_bus_check(video); |
1649 | if (error) | |
1650 | goto err_free_video; | |
1da177e4 | 1651 | |
bbac81f5 | 1652 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1653 | INIT_LIST_HEAD(&video->video_device_list); |
1654 | ||
1655 | acpi_video_bus_get_devices(video, device); | |
1656 | acpi_video_bus_start_devices(video); | |
1657 | ||
e9dab196 | 1658 | video->input = input = input_allocate_device(); |
f51e8391 DT |
1659 | if (!input) { |
1660 | error = -ENOMEM; | |
7015558f | 1661 | goto err_stop_video; |
f51e8391 | 1662 | } |
e9dab196 LY |
1663 | |
1664 | snprintf(video->phys, sizeof(video->phys), | |
1665 | "%s/video/input0", acpi_device_hid(video->device)); | |
1666 | ||
1667 | input->name = acpi_device_name(video->device); | |
1668 | input->phys = video->phys; | |
1669 | input->id.bustype = BUS_HOST; | |
1670 | input->id.product = 0x06; | |
91c05c66 | 1671 | input->dev.parent = &device->dev; |
e9dab196 LY |
1672 | input->evbit[0] = BIT(EV_KEY); |
1673 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1674 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1675 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1676 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1677 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1678 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1679 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1680 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
e9dab196 | 1681 | |
f51e8391 DT |
1682 | error = input_register_device(input); |
1683 | if (error) | |
1684 | goto err_free_input_dev; | |
e9dab196 | 1685 | |
1da177e4 | 1686 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1687 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1688 | video->flags.multihead ? "yes" : "no", | |
1689 | video->flags.rom ? "yes" : "no", | |
1690 | video->flags.post ? "yes" : "no"); | |
1da177e4 | 1691 | |
ac7729da RW |
1692 | video->pm_nb.notifier_call = acpi_video_resume; |
1693 | video->pm_nb.priority = 0; | |
1694 | register_pm_notifier(&video->pm_nb); | |
1695 | ||
f51e8391 DT |
1696 | return 0; |
1697 | ||
1698 | err_free_input_dev: | |
1699 | input_free_device(input); | |
f51e8391 DT |
1700 | err_stop_video: |
1701 | acpi_video_bus_stop_devices(video); | |
1702 | acpi_video_bus_put_devices(video); | |
1703 | kfree(video->attached_array); | |
f51e8391 DT |
1704 | err_free_video: |
1705 | kfree(video); | |
db89b4f0 | 1706 | device->driver_data = NULL; |
1da177e4 | 1707 | |
f51e8391 | 1708 | return error; |
1da177e4 LT |
1709 | } |
1710 | ||
4be44fcd | 1711 | static int acpi_video_bus_remove(struct acpi_device *device, int type) |
1da177e4 | 1712 | { |
4be44fcd | 1713 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1714 | |
1da177e4 LT |
1715 | |
1716 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1717 | return -EINVAL; |
1da177e4 | 1718 | |
50dd0969 | 1719 | video = acpi_driver_data(device); |
1da177e4 | 1720 | |
ac7729da RW |
1721 | unregister_pm_notifier(&video->pm_nb); |
1722 | ||
1da177e4 | 1723 | acpi_video_bus_stop_devices(video); |
1da177e4 | 1724 | acpi_video_bus_put_devices(video); |
1da177e4 | 1725 | |
e9dab196 | 1726 | input_unregister_device(video->input); |
6044ec88 | 1727 | kfree(video->attached_array); |
1da177e4 LT |
1728 | kfree(video); |
1729 | ||
d550d98d | 1730 | return 0; |
1da177e4 LT |
1731 | } |
1732 | ||
74a365b3 MG |
1733 | static int __init intel_opregion_present(void) |
1734 | { | |
1735 | #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE) | |
1736 | struct pci_dev *dev = NULL; | |
1737 | u32 address; | |
1738 | ||
1739 | for_each_pci_dev(dev) { | |
1740 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1741 | continue; | |
1742 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1743 | continue; | |
1744 | pci_read_config_dword(dev, 0xfc, &address); | |
1745 | if (!address) | |
1746 | continue; | |
1747 | return 1; | |
1748 | } | |
1749 | #endif | |
1750 | return 0; | |
1751 | } | |
1752 | ||
1753 | int acpi_video_register(void) | |
1da177e4 | 1754 | { |
4be44fcd | 1755 | int result = 0; |
86e437f0 ZY |
1756 | if (register_count) { |
1757 | /* | |
1758 | * if the function of acpi_video_register is already called, | |
1759 | * don't register the acpi_vide_bus again and return no error. | |
1760 | */ | |
1761 | return 0; | |
1762 | } | |
1da177e4 | 1763 | |
1da177e4 | 1764 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1765 | if (result < 0) |
d550d98d | 1766 | return -ENODEV; |
1da177e4 | 1767 | |
86e437f0 ZY |
1768 | /* |
1769 | * When the acpi_video_bus is loaded successfully, increase | |
1770 | * the counter reference. | |
1771 | */ | |
1772 | register_count = 1; | |
1773 | ||
d550d98d | 1774 | return 0; |
1da177e4 | 1775 | } |
74a365b3 MG |
1776 | EXPORT_SYMBOL(acpi_video_register); |
1777 | ||
86e437f0 ZY |
1778 | void acpi_video_unregister(void) |
1779 | { | |
1780 | if (!register_count) { | |
1781 | /* | |
1782 | * If the acpi video bus is already unloaded, don't | |
1783 | * unload it again and return directly. | |
1784 | */ | |
1785 | return; | |
1786 | } | |
1787 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1788 | ||
86e437f0 ZY |
1789 | register_count = 0; |
1790 | ||
1791 | return; | |
1792 | } | |
1793 | EXPORT_SYMBOL(acpi_video_unregister); | |
1794 | ||
74a365b3 MG |
1795 | /* |
1796 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1797 | * the video opregion code to be run first in order to initialise | |
1798 | * state before any ACPI video calls are made. To handle this we defer | |
1799 | * registration of the video class until the opregion code has run. | |
1800 | */ | |
1801 | ||
1802 | static int __init acpi_video_init(void) | |
1803 | { | |
45cb50e6 ZR |
1804 | dmi_check_system(video_dmi_table); |
1805 | ||
74a365b3 MG |
1806 | if (intel_opregion_present()) |
1807 | return 0; | |
1808 | ||
1809 | return acpi_video_register(); | |
1810 | } | |
1da177e4 | 1811 | |
86e437f0 | 1812 | static void __exit acpi_video_exit(void) |
1da177e4 | 1813 | { |
86e437f0 | 1814 | acpi_video_unregister(); |
1da177e4 | 1815 | |
d550d98d | 1816 | return; |
1da177e4 LT |
1817 | } |
1818 | ||
1819 | module_init(acpi_video_init); | |
1820 | module_exit(acpi_video_exit); |