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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 LT |
49 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
50 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
51 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
52 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
53 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
54 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
55 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
56 | ||
f4715189 TT |
57 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
58 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
59 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
60 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
61 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 62 | |
2f3d000a | 63 | #define MAX_NAME_LEN 20 |
1da177e4 | 64 | |
1da177e4 | 65 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 66 | ACPI_MODULE_NAME("video"); |
1da177e4 | 67 | |
f52fd66d | 68 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 69 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
70 | MODULE_LICENSE("GPL"); |
71 | ||
90ab5ee9 | 72 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
73 | module_param(brightness_switch_enabled, bool, 0644); |
74 | ||
c504f8cb ZR |
75 | /* |
76 | * By default, we don't allow duplicate ACPI video bus devices | |
77 | * under the same VGA controller | |
78 | */ | |
90ab5ee9 | 79 | static bool allow_duplicates; |
c504f8cb ZR |
80 | module_param(allow_duplicates, bool, 0644); |
81 | ||
99fd1895 ZR |
82 | /* |
83 | * Some BIOSes claim they use minimum backlight at boot, | |
84 | * and this may bring dimming screen after boot | |
85 | */ | |
90ab5ee9 | 86 | static bool use_bios_initial_backlight = 1; |
99fd1895 ZR |
87 | module_param(use_bios_initial_backlight, bool, 0644); |
88 | ||
86e437f0 | 89 | static int register_count = 0; |
4be44fcd | 90 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 91 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 92 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 93 | |
1ba90e3a TR |
94 | static const struct acpi_device_id video_device_ids[] = { |
95 | {ACPI_VIDEO_HID, 0}, | |
96 | {"", 0}, | |
97 | }; | |
98 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
99 | ||
1da177e4 | 100 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 101 | .name = "video", |
1da177e4 | 102 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 103 | .ids = video_device_ids, |
1da177e4 LT |
104 | .ops = { |
105 | .add = acpi_video_bus_add, | |
106 | .remove = acpi_video_bus_remove, | |
7015558f | 107 | .notify = acpi_video_bus_notify, |
4be44fcd | 108 | }, |
1da177e4 LT |
109 | }; |
110 | ||
111 | struct acpi_video_bus_flags { | |
4be44fcd LB |
112 | u8 multihead:1; /* can switch video heads */ |
113 | u8 rom:1; /* can retrieve a video rom */ | |
114 | u8 post:1; /* can configure the head to */ | |
115 | u8 reserved:5; | |
1da177e4 LT |
116 | }; |
117 | ||
118 | struct acpi_video_bus_cap { | |
4be44fcd LB |
119 | u8 _DOS:1; /*Enable/Disable output switching */ |
120 | u8 _DOD:1; /*Enumerate all devices attached to display adapter */ | |
121 | u8 _ROM:1; /*Get ROM Data */ | |
122 | u8 _GPD:1; /*Get POST Device */ | |
123 | u8 _SPD:1; /*Set POST Device */ | |
124 | u8 _VPO:1; /*Video POST Options */ | |
125 | u8 reserved:2; | |
1da177e4 LT |
126 | }; |
127 | ||
4be44fcd LB |
128 | struct acpi_video_device_attrib { |
129 | u32 display_index:4; /* A zero-based instance of the Display */ | |
98fb8fe1 | 130 | u32 display_port_attachment:4; /*This field differentiates the display type */ |
4be44fcd | 131 | u32 display_type:4; /*Describe the specific type in use */ |
98fb8fe1 | 132 | u32 vendor_specific:4; /*Chipset Vendor Specific */ |
4be44fcd LB |
133 | u32 bios_can_detect:1; /*BIOS can detect the device */ |
134 | u32 depend_on_vga:1; /*Non-VGA output device whose power is related to | |
135 | the VGA device. */ | |
136 | u32 pipe_id:3; /*For VGA multiple-head devices. */ | |
137 | u32 reserved:10; /*Must be 0 */ | |
138 | u32 device_id_scheme:1; /*Device ID Scheme */ | |
1da177e4 LT |
139 | }; |
140 | ||
141 | struct acpi_video_enumerated_device { | |
142 | union { | |
143 | u32 int_val; | |
4be44fcd | 144 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
145 | } value; |
146 | struct acpi_video_device *bind_info; | |
147 | }; | |
148 | ||
149 | struct acpi_video_bus { | |
e6afa0de | 150 | struct acpi_device *device; |
4be44fcd | 151 | u8 dos_setting; |
1da177e4 | 152 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
153 | u8 attached_count; |
154 | struct acpi_video_bus_cap cap; | |
1da177e4 | 155 | struct acpi_video_bus_flags flags; |
4be44fcd | 156 | struct list_head video_device_list; |
bbac81f5 | 157 | struct mutex device_list_lock; /* protects video_device_list */ |
e9dab196 LY |
158 | struct input_dev *input; |
159 | char phys[32]; /* for input device */ | |
ac7729da | 160 | struct notifier_block pm_nb; |
1da177e4 LT |
161 | }; |
162 | ||
163 | struct acpi_video_device_flags { | |
4be44fcd LB |
164 | u8 crt:1; |
165 | u8 lcd:1; | |
166 | u8 tvout:1; | |
82cae999 | 167 | u8 dvi:1; |
4be44fcd LB |
168 | u8 bios:1; |
169 | u8 unknown:1; | |
91e13aa3 AL |
170 | u8 notify:1; |
171 | u8 reserved:1; | |
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, | |
a89803df | 226 | unsigned long long *level, bool raw); |
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 | |
a89803df | 240 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
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 | |
a89803df | 285 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
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 | ||
9c8b04be | 311 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
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 | ||
129ff8f8 ZR |
393 | static int video_ignore_initial_backlight(const struct dmi_system_id *d) |
394 | { | |
395 | use_bios_initial_backlight = 0; | |
396 | return 0; | |
397 | } | |
398 | ||
45cb50e6 ZR |
399 | static struct dmi_system_id video_dmi_table[] __initdata = { |
400 | /* | |
401 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
402 | */ | |
403 | { | |
404 | .callback = video_set_bqc_offset, | |
405 | .ident = "Acer Aspire 5720", | |
406 | .matches = { | |
407 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
408 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
409 | }, | |
410 | }, | |
5afc4abe LB |
411 | { |
412 | .callback = video_set_bqc_offset, | |
413 | .ident = "Acer Aspire 5710Z", | |
414 | .matches = { | |
415 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
416 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
417 | }, | |
418 | }, | |
34ac272b ZR |
419 | { |
420 | .callback = video_set_bqc_offset, | |
421 | .ident = "eMachines E510", | |
422 | .matches = { | |
423 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
424 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
425 | }, | |
426 | }, | |
93bcece2 ZR |
427 | { |
428 | .callback = video_set_bqc_offset, | |
429 | .ident = "Acer Aspire 5315", | |
430 | .matches = { | |
431 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
432 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
433 | }, | |
434 | }, | |
152a4e63 ZR |
435 | { |
436 | .callback = video_set_bqc_offset, | |
437 | .ident = "Acer Aspire 7720", | |
438 | .matches = { | |
439 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
440 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
441 | }, | |
442 | }, | |
129ff8f8 ZR |
443 | { |
444 | .callback = video_ignore_initial_backlight, | |
445 | .ident = "HP Folio 13-2000", | |
446 | .matches = { | |
447 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
448 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), | |
449 | }, | |
450 | }, | |
771d09b3 GMDV |
451 | { |
452 | .callback = video_ignore_initial_backlight, | |
453 | .ident = "HP Pavilion dm4", | |
454 | .matches = { | |
455 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
456 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), | |
457 | }, | |
458 | }, | |
780a6ec6 AW |
459 | { |
460 | .callback = video_ignore_initial_backlight, | |
461 | .ident = "HP Pavilion g6 Notebook PC", | |
462 | .matches = { | |
463 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
464 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), | |
465 | }, | |
466 | }, | |
4ef366c5 AH |
467 | { |
468 | .callback = video_ignore_initial_backlight, | |
469 | .ident = "HP 1000 Notebook PC", | |
470 | .matches = { | |
471 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
472 | DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), | |
473 | }, | |
474 | }, | |
fedbe9bc AH |
475 | { |
476 | .callback = video_ignore_initial_backlight, | |
477 | .ident = "HP Pavilion m4", | |
478 | .matches = { | |
479 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
480 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), | |
481 | }, | |
482 | }, | |
45cb50e6 ZR |
483 | {} |
484 | }; | |
485 | ||
994fa63c DB |
486 | static unsigned long long |
487 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
488 | unsigned long long bqc_value) | |
489 | { | |
490 | unsigned long long level; | |
491 | ||
492 | if (device->brightness->flags._BQC_use_index) { | |
493 | /* | |
494 | * _BQC returns an index that doesn't account for | |
495 | * the first 2 items with special meaning, so we need | |
496 | * to compensate for that by offsetting ourselves | |
497 | */ | |
498 | if (device->brightness->flags._BCL_reversed) | |
499 | bqc_value = device->brightness->count - 3 - bqc_value; | |
500 | ||
501 | level = device->brightness->levels[bqc_value + 2]; | |
502 | } else { | |
503 | level = bqc_value; | |
504 | } | |
505 | ||
506 | level += bqc_offset_aml_bug_workaround; | |
507 | ||
508 | return level; | |
509 | } | |
510 | ||
1da177e4 | 511 | static int |
4be44fcd | 512 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 513 | unsigned long long *level, bool raw) |
1da177e4 | 514 | { |
c8890f90 | 515 | acpi_status status = AE_OK; |
4e231fa4 | 516 | int i; |
c8890f90 | 517 | |
c60d638e ZR |
518 | if (device->cap._BQC || device->cap._BCQ) { |
519 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
520 | ||
521 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
522 | NULL, level); |
523 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
524 | if (raw) { |
525 | /* | |
526 | * Caller has indicated he wants the raw | |
527 | * value returned by _BQC, so don't furtherly | |
528 | * mess with the value. | |
529 | */ | |
530 | return 0; | |
531 | } | |
532 | ||
994fa63c | 533 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 534 | |
4e231fa4 VS |
535 | for (i = 2; i < device->brightness->count; i++) |
536 | if (device->brightness->levels[i] == *level) { | |
537 | device->brightness->curr = *level; | |
538 | return 0; | |
539 | } | |
a89803df DB |
540 | /* |
541 | * BQC returned an invalid level. | |
542 | * Stop using it. | |
543 | */ | |
544 | ACPI_WARNING((AE_INFO, | |
545 | "%s returned an invalid level", | |
546 | buf)); | |
547 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
548 | } else { |
549 | /* Fixme: | |
550 | * should we return an error or ignore this failure? | |
551 | * dev->brightness->curr is a cached value which stores | |
552 | * the correct current backlight level in most cases. | |
553 | * ACPI video backlight still works w/ buggy _BQC. | |
554 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
555 | */ | |
c60d638e ZR |
556 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
557 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
558 | } |
559 | } | |
560 | ||
4500ca8e | 561 | *level = device->brightness->curr; |
c8890f90 | 562 | return 0; |
1da177e4 LT |
563 | } |
564 | ||
565 | static int | |
4be44fcd LB |
566 | acpi_video_device_EDID(struct acpi_video_device *device, |
567 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 568 | { |
4be44fcd LB |
569 | int status; |
570 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
571 | union acpi_object *obj; | |
572 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
573 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 574 | |
1da177e4 LT |
575 | |
576 | *edid = NULL; | |
577 | ||
578 | if (!device) | |
d550d98d | 579 | return -ENODEV; |
1da177e4 LT |
580 | if (length == 128) |
581 | arg0.integer.value = 1; | |
582 | else if (length == 256) | |
583 | arg0.integer.value = 2; | |
584 | else | |
d550d98d | 585 | return -EINVAL; |
1da177e4 | 586 | |
90130268 | 587 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 588 | if (ACPI_FAILURE(status)) |
d550d98d | 589 | return -ENODEV; |
1da177e4 | 590 | |
50dd0969 | 591 | obj = buffer.pointer; |
1da177e4 LT |
592 | |
593 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
594 | *edid = obj; | |
595 | else { | |
6468463a | 596 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
597 | status = -EFAULT; |
598 | kfree(obj); | |
599 | } | |
600 | ||
d550d98d | 601 | return status; |
1da177e4 LT |
602 | } |
603 | ||
1da177e4 LT |
604 | /* bus */ |
605 | ||
1da177e4 LT |
606 | /* |
607 | * Arg: | |
608 | * video : video bus device pointer | |
609 | * bios_flag : | |
610 | * 0. The system BIOS should NOT automatically switch(toggle) | |
611 | * the active display output. | |
612 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 613 | * active display output. No switch event. |
1da177e4 LT |
614 | * 2. The _DGS value should be locked. |
615 | * 3. The system BIOS should not automatically switch (toggle) the | |
616 | * active display output, but instead generate the display switch | |
617 | * event notify code. | |
618 | * lcd_flag : | |
619 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 620 | * of the LCD when the power changes from AC to DC |
1da177e4 | 621 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 622 | * level of the LCD when the power changes from AC to DC. |
1da177e4 | 623 | * Return Value: |
ea9f8856 | 624 | * -EINVAL wrong arg. |
1da177e4 LT |
625 | */ |
626 | ||
627 | static int | |
4be44fcd | 628 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 629 | { |
ea9f8856 | 630 | acpi_status status; |
4be44fcd LB |
631 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
632 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 633 | |
b0373843 ZR |
634 | if (!video->cap._DOS) |
635 | return 0; | |
1da177e4 | 636 | |
ea9f8856 IM |
637 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
638 | return -EINVAL; | |
1da177e4 LT |
639 | arg0.integer.value = (lcd_flag << 2) | bios_flag; |
640 | video->dos_setting = arg0.integer.value; | |
ea9f8856 IM |
641 | status = acpi_evaluate_object(video->device->handle, "_DOS", |
642 | &args, NULL); | |
643 | if (ACPI_FAILURE(status)) | |
644 | return -EIO; | |
1da177e4 | 645 | |
ea9f8856 | 646 | return 0; |
1da177e4 LT |
647 | } |
648 | ||
935e5f29 ZR |
649 | /* |
650 | * Simple comparison function used to sort backlight levels. | |
651 | */ | |
652 | ||
653 | static int | |
654 | acpi_video_cmp_level(const void *a, const void *b) | |
655 | { | |
656 | return *(int *)a - *(int *)b; | |
657 | } | |
658 | ||
a50188da AL |
659 | /* |
660 | * Decides if _BQC/_BCQ for this system is usable | |
661 | * | |
662 | * We do this by changing the level first and then read out the current | |
663 | * brightness level, if the value does not match, find out if it is using | |
664 | * index. If not, clear the _BQC/_BCQ capability. | |
665 | */ | |
666 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
667 | int max_level, int current_level) | |
668 | { | |
669 | struct acpi_video_device_brightness *br = device->brightness; | |
670 | int result; | |
671 | unsigned long long level; | |
672 | int test_level; | |
673 | ||
674 | /* don't mess with existing known broken systems */ | |
675 | if (bqc_offset_aml_bug_workaround) | |
676 | return 0; | |
677 | ||
678 | /* | |
679 | * Some systems always report current brightness level as maximum | |
680 | * through _BQC, we need to test another value for them. | |
681 | */ | |
682 | test_level = current_level == max_level ? br->levels[2] : max_level; | |
683 | ||
684 | result = acpi_video_device_lcd_set_level(device, test_level); | |
685 | if (result) | |
686 | return result; | |
687 | ||
688 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
689 | if (result) | |
690 | return result; | |
691 | ||
692 | if (level != test_level) { | |
693 | /* buggy _BQC found, need to find out if it uses index */ | |
694 | if (level < br->count) { | |
695 | if (br->flags._BCL_reversed) | |
696 | level = br->count - 3 - level; | |
697 | if (br->levels[level + 2] == test_level) | |
698 | br->flags._BQC_use_index = 1; | |
699 | } | |
700 | ||
701 | if (!br->flags._BQC_use_index) | |
702 | device->cap._BQC = device->cap._BCQ = 0; | |
703 | } | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
708 | ||
1da177e4 LT |
709 | /* |
710 | * Arg: | |
711 | * device : video output device (LCD, CRT, ..) | |
712 | * | |
713 | * Return Value: | |
469778c1 JJ |
714 | * Maximum brightness level |
715 | * | |
716 | * Allocate and initialize device->brightness. | |
717 | */ | |
718 | ||
719 | static int | |
720 | acpi_video_init_brightness(struct acpi_video_device *device) | |
721 | { | |
722 | union acpi_object *obj = NULL; | |
d32f6947 | 723 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 724 | unsigned long long level, level_old; |
469778c1 JJ |
725 | union acpi_object *o; |
726 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 727 | int result = -EINVAL; |
469778c1 JJ |
728 | |
729 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
730 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
731 | "LCD brightness level\n")); | |
732 | goto out; | |
733 | } | |
734 | ||
735 | if (obj->package.count < 2) | |
736 | goto out; | |
737 | ||
738 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
739 | if (!br) { | |
740 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 741 | result = -ENOMEM; |
469778c1 JJ |
742 | goto out; |
743 | } | |
744 | ||
d32f6947 | 745 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 746 | GFP_KERNEL); |
1a7c618a ZR |
747 | if (!br->levels) { |
748 | result = -ENOMEM; | |
469778c1 | 749 | goto out_free; |
1a7c618a | 750 | } |
469778c1 JJ |
751 | |
752 | for (i = 0; i < obj->package.count; i++) { | |
753 | o = (union acpi_object *)&obj->package.elements[i]; | |
754 | if (o->type != ACPI_TYPE_INTEGER) { | |
755 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
756 | continue; | |
757 | } | |
758 | br->levels[count] = (u32) o->integer.value; | |
759 | ||
760 | if (br->levels[count] > max_level) | |
761 | max_level = br->levels[count]; | |
762 | count++; | |
763 | } | |
764 | ||
d32f6947 ZR |
765 | /* |
766 | * some buggy BIOS don't export the levels | |
767 | * when machine is on AC/Battery in _BCL package. | |
768 | * In this case, the first two elements in _BCL packages | |
769 | * are also supported brightness levels that OS should take care of. | |
770 | */ | |
90af2cf6 ZR |
771 | for (i = 2; i < count; i++) { |
772 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 773 | level_ac_battery++; |
90af2cf6 ZR |
774 | if (br->levels[i] == br->levels[1]) |
775 | level_ac_battery++; | |
776 | } | |
d32f6947 ZR |
777 | |
778 | if (level_ac_battery < 2) { | |
779 | level_ac_battery = 2 - level_ac_battery; | |
780 | br->flags._BCL_no_ac_battery_levels = 1; | |
781 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
782 | br->levels[i] = br->levels[i - level_ac_battery]; | |
783 | count += level_ac_battery; | |
784 | } else if (level_ac_battery > 2) | |
bf6787eb | 785 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 786 | |
d80fb99f ZR |
787 | /* Check if the _BCL package is in a reversed order */ |
788 | if (max_level == br->levels[2]) { | |
789 | br->flags._BCL_reversed = 1; | |
790 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
791 | acpi_video_cmp_level, NULL); | |
792 | } else if (max_level != br->levels[count - 1]) | |
793 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 794 | "Found unordered _BCL package")); |
469778c1 JJ |
795 | |
796 | br->count = count; | |
797 | device->brightness = br; | |
1a7c618a ZR |
798 | |
799 | /* Check the input/output of _BQC/_BCL/_BCM */ | |
800 | if ((max_level < 100) && (max_level <= (count - 2))) | |
801 | br->flags._BCL_use_index = 1; | |
802 | ||
803 | /* | |
804 | * _BCM is always consistent with _BCL, | |
805 | * at least for all the laptops we have ever seen. | |
806 | */ | |
807 | br->flags._BCM_use_index = br->flags._BCL_use_index; | |
808 | ||
809 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ | |
90c53ca4 | 810 | br->curr = level = max_level; |
e047cca6 ZR |
811 | |
812 | if (!device->cap._BQC) | |
813 | goto set_level; | |
814 | ||
a89803df DB |
815 | result = acpi_video_device_lcd_get_level_current(device, |
816 | &level_old, true); | |
1a7c618a ZR |
817 | if (result) |
818 | goto out_free_levels; | |
819 | ||
a50188da | 820 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
821 | if (result) |
822 | goto out_free_levels; | |
a50188da AL |
823 | /* |
824 | * cap._BQC may get cleared due to _BQC is found to be broken | |
825 | * in acpi_video_bqc_quirk, so check again here. | |
826 | */ | |
827 | if (!device->cap._BQC) | |
828 | goto set_level; | |
e047cca6 | 829 | |
994fa63c DB |
830 | if (use_bios_initial_backlight) { |
831 | level = acpi_video_bqc_value_to_level(device, level_old); | |
90c53ca4 | 832 | /* |
994fa63c DB |
833 | * On some buggy laptops, _BQC returns an uninitialized |
834 | * value when invoked for the first time, i.e. | |
835 | * level_old is invalid (no matter whether it's a level | |
836 | * or an index). Set the backlight to max_level in this case. | |
90c53ca4 | 837 | */ |
994fa63c DB |
838 | for (i = 2; i < br->count; i++) |
839 | if (level_old == br->levels[i]) | |
840 | break; | |
841 | if (i == br->count) | |
842 | level = max_level; | |
90c53ca4 | 843 | } |
e047cca6 | 844 | |
e047cca6 | 845 | set_level: |
90c53ca4 | 846 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
847 | if (result) |
848 | goto out_free_levels; | |
1a7c618a | 849 | |
d32f6947 ZR |
850 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
851 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 852 | kfree(obj); |
1a7c618a | 853 | return result; |
469778c1 JJ |
854 | |
855 | out_free_levels: | |
856 | kfree(br->levels); | |
857 | out_free: | |
858 | kfree(br); | |
859 | out: | |
860 | device->brightness = NULL; | |
861 | kfree(obj); | |
1a7c618a | 862 | return result; |
469778c1 JJ |
863 | } |
864 | ||
865 | /* | |
866 | * Arg: | |
867 | * device : video output device (LCD, CRT, ..) | |
868 | * | |
869 | * Return Value: | |
1da177e4 LT |
870 | * None |
871 | * | |
98fb8fe1 | 872 | * Find out all required AML methods defined under the output |
1da177e4 LT |
873 | * device. |
874 | */ | |
875 | ||
4be44fcd | 876 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 877 | { |
952c63e9 | 878 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 879 | device->cap._ADR = 1; |
952c63e9 | 880 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 881 | device->cap._BCL = 1; |
952c63e9 | 882 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 883 | device->cap._BCM = 1; |
952c63e9 | 884 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 885 | device->cap._BQC = 1; |
952c63e9 | 886 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
887 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
888 | device->cap._BCQ = 1; | |
889 | } | |
890 | ||
952c63e9 | 891 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 892 | device->cap._DDC = 1; |
1da177e4 | 893 | |
1a7c618a | 894 | if (acpi_video_backlight_support()) { |
a19a6ee6 | 895 | struct backlight_properties props; |
9661e92c MG |
896 | struct pci_dev *pdev; |
897 | acpi_handle acpi_parent; | |
898 | struct device *parent = NULL; | |
702ed512 | 899 | int result; |
2f3d000a YL |
900 | static int count = 0; |
901 | char *name; | |
1a7c618a ZR |
902 | |
903 | result = acpi_video_init_brightness(device); | |
904 | if (result) | |
905 | return; | |
aeb834d9 | 906 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
2f3d000a YL |
907 | if (!name) |
908 | return; | |
aeb834d9 | 909 | count++; |
2f3d000a | 910 | |
9661e92c MG |
911 | acpi_get_parent(device->dev->handle, &acpi_parent); |
912 | ||
913 | pdev = acpi_get_pci_dev(acpi_parent); | |
914 | if (pdev) { | |
915 | parent = &pdev->dev; | |
916 | pci_dev_put(pdev); | |
917 | } | |
918 | ||
a19a6ee6 | 919 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 920 | props.type = BACKLIGHT_FIRMWARE; |
a19a6ee6 | 921 | props.max_brightness = device->brightness->count - 3; |
9661e92c MG |
922 | device->backlight = backlight_device_register(name, |
923 | parent, | |
924 | device, | |
a19a6ee6 MG |
925 | &acpi_backlight_ops, |
926 | &props); | |
2f3d000a | 927 | kfree(name); |
e01ce79b ZR |
928 | if (IS_ERR(device->backlight)) |
929 | return; | |
702ed512 | 930 | |
ac7729da RW |
931 | /* |
932 | * Save current brightness level in case we have to restore it | |
933 | * before acpi_video_device_lcd_set_level() is called next time. | |
934 | */ | |
935 | device->backlight->props.brightness = | |
936 | acpi_video_get_brightness(device->backlight); | |
702ed512 | 937 | |
4a703a8f | 938 | device->cooling_dev = thermal_cooling_device_register("LCD", |
702ed512 | 939 | device->dev, &video_cooling_ops); |
4a703a8f | 940 | if (IS_ERR(device->cooling_dev)) { |
4b4fe3b6 | 941 | /* |
4a703a8f | 942 | * Set cooling_dev to NULL so we don't crash trying to |
4b4fe3b6 DT |
943 | * free it. |
944 | * Also, why the hell we are returning early and | |
945 | * not attempt to register video output if cooling | |
946 | * device registration failed? | |
947 | * -- dtor | |
948 | */ | |
4a703a8f | 949 | device->cooling_dev = NULL; |
43ff39f2 | 950 | return; |
4b4fe3b6 | 951 | } |
43ff39f2 | 952 | |
fc3a8828 | 953 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
4a703a8f | 954 | device->cooling_dev->id); |
9030062f | 955 | result = sysfs_create_link(&device->dev->dev.kobj, |
4a703a8f | 956 | &device->cooling_dev->device.kobj, |
9030062f JL |
957 | "thermal_cooling"); |
958 | if (result) | |
959 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
4a703a8f | 960 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
9030062f JL |
961 | &device->dev->dev.kobj, "device"); |
962 | if (result) | |
963 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
964 | ||
2f3d000a | 965 | } |
1da177e4 LT |
966 | } |
967 | ||
968 | /* | |
969 | * Arg: | |
970 | * device : video output device (VGA) | |
971 | * | |
972 | * Return Value: | |
973 | * None | |
974 | * | |
98fb8fe1 | 975 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
976 | */ |
977 | ||
4be44fcd | 978 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 979 | { |
952c63e9 | 980 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 981 | video->cap._DOS = 1; |
952c63e9 | 982 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 983 | video->cap._DOD = 1; |
952c63e9 | 984 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 985 | video->cap._ROM = 1; |
952c63e9 | 986 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 987 | video->cap._GPD = 1; |
952c63e9 | 988 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 989 | video->cap._SPD = 1; |
952c63e9 | 990 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 991 | video->cap._VPO = 1; |
1da177e4 LT |
992 | } |
993 | ||
994 | /* | |
995 | * Check whether the video bus device has required AML method to | |
996 | * support the desired features | |
997 | */ | |
998 | ||
4be44fcd | 999 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1000 | { |
4be44fcd | 1001 | acpi_status status = -ENOENT; |
1e4cffe7 | 1002 | struct pci_dev *dev; |
1da177e4 LT |
1003 | |
1004 | if (!video) | |
d550d98d | 1005 | return -EINVAL; |
1da177e4 | 1006 | |
1e4cffe7 | 1007 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1008 | if (!dev) |
1009 | return -ENODEV; | |
1e4cffe7 | 1010 | pci_dev_put(dev); |
22c13f9d | 1011 | |
1da177e4 LT |
1012 | /* Since there is no HID, CID and so on for VGA driver, we have |
1013 | * to check well known required nodes. | |
1014 | */ | |
1015 | ||
98fb8fe1 | 1016 | /* Does this device support video switching? */ |
3a1151e3 SB |
1017 | if (video->cap._DOS || video->cap._DOD) { |
1018 | if (!video->cap._DOS) { | |
1019 | printk(KERN_WARNING FW_BUG | |
1020 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1021 | acpi_device_bid(video->device)); | |
1022 | } | |
1da177e4 LT |
1023 | video->flags.multihead = 1; |
1024 | status = 0; | |
1025 | } | |
1026 | ||
98fb8fe1 | 1027 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1028 | if (video->cap._ROM) { |
1da177e4 LT |
1029 | video->flags.rom = 1; |
1030 | status = 0; | |
1031 | } | |
1032 | ||
98fb8fe1 | 1033 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1034 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1035 | video->flags.post = 1; |
1036 | status = 0; | |
1037 | } | |
1038 | ||
d550d98d | 1039 | return status; |
1da177e4 LT |
1040 | } |
1041 | ||
1da177e4 LT |
1042 | /* -------------------------------------------------------------------------- |
1043 | Driver Interface | |
1044 | -------------------------------------------------------------------------- */ | |
1045 | ||
1046 | /* device interface */ | |
82cae999 RZ |
1047 | static struct acpi_video_device_attrib* |
1048 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) | |
1049 | { | |
78eed028 DT |
1050 | struct acpi_video_enumerated_device *ids; |
1051 | int i; | |
1052 | ||
1053 | for (i = 0; i < video->attached_count; i++) { | |
1054 | ids = &video->attached_array[i]; | |
1055 | if ((ids->value.int_val & 0xffff) == device_id) | |
1056 | return &ids->value.attrib; | |
1057 | } | |
82cae999 | 1058 | |
82cae999 RZ |
1059 | return NULL; |
1060 | } | |
1da177e4 | 1061 | |
e92a7162 MG |
1062 | static int |
1063 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1064 | unsigned long device_id) | |
1065 | { | |
1066 | struct acpi_video_enumerated_device *ids; | |
1067 | int i; | |
1068 | ||
1069 | for (i = 0; i < video->attached_count; i++) { | |
1070 | ids = &video->attached_array[i]; | |
1071 | if ((ids->value.int_val & 0xffff) == device_id) | |
1072 | return ids->value.int_val; | |
1073 | } | |
1074 | ||
1075 | return 0; | |
1076 | } | |
1077 | ||
1da177e4 | 1078 | static int |
4be44fcd LB |
1079 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1080 | struct acpi_video_bus *video) | |
1da177e4 | 1081 | { |
27663c58 | 1082 | unsigned long long device_id; |
e92a7162 | 1083 | int status, device_type; |
4be44fcd | 1084 | struct acpi_video_device *data; |
82cae999 | 1085 | struct acpi_video_device_attrib* attribute; |
1da177e4 | 1086 | |
4be44fcd LB |
1087 | status = |
1088 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1089 | /* Some device omits _ADR, we skip them instead of fail */ |
1090 | if (ACPI_FAILURE(status)) | |
1091 | return 0; | |
1da177e4 | 1092 | |
91e13aa3 AL |
1093 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1094 | if (!data) | |
1095 | return -ENOMEM; | |
82cae999 | 1096 | |
91e13aa3 AL |
1097 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1098 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1099 | device->driver_data = data; | |
1100 | ||
1101 | data->device_id = device_id; | |
1102 | data->video = video; | |
1103 | data->dev = device; | |
1104 | ||
1105 | attribute = acpi_video_get_device_attr(video, device_id); | |
1106 | ||
1107 | if((attribute != NULL) && attribute->device_id_scheme) { | |
1108 | switch (attribute->display_type) { | |
1109 | case ACPI_VIDEO_DISPLAY_CRT: | |
1110 | data->flags.crt = 1; | |
1111 | break; | |
1112 | case ACPI_VIDEO_DISPLAY_TV: | |
1113 | data->flags.tvout = 1; | |
1114 | break; | |
1115 | case ACPI_VIDEO_DISPLAY_DVI: | |
1116 | data->flags.dvi = 1; | |
1117 | break; | |
1118 | case ACPI_VIDEO_DISPLAY_LCD: | |
1119 | data->flags.lcd = 1; | |
1120 | break; | |
1121 | default: | |
1122 | data->flags.unknown = 1; | |
1123 | break; | |
1124 | } | |
1125 | if(attribute->bios_can_detect) | |
1126 | data->flags.bios = 1; | |
1127 | } else { | |
1128 | /* Check for legacy IDs */ | |
1129 | device_type = acpi_video_get_device_type(video, device_id); | |
1130 | /* Ignore bits 16 and 18-20 */ | |
1131 | switch (device_type & 0xffe2ffff) { | |
e92a7162 MG |
1132 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1133 | data->flags.crt = 1; | |
1134 | break; | |
1135 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1136 | data->flags.lcd = 1; | |
1137 | break; | |
1138 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1139 | data->flags.tvout = 1; | |
1140 | break; | |
1141 | default: | |
1142 | data->flags.unknown = 1; | |
e92a7162 | 1143 | } |
91e13aa3 | 1144 | } |
4be44fcd | 1145 | |
91e13aa3 AL |
1146 | acpi_video_device_bind(video, data); |
1147 | acpi_video_device_find_cap(data); | |
1da177e4 | 1148 | |
91e13aa3 AL |
1149 | status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
1150 | acpi_video_device_notify, data); | |
1151 | if (ACPI_FAILURE(status)) | |
1152 | dev_err(&device->dev, "Error installing notify handler\n"); | |
1153 | else | |
1154 | data->flags.notify = 1; | |
1da177e4 | 1155 | |
91e13aa3 AL |
1156 | mutex_lock(&video->device_list_lock); |
1157 | list_add_tail(&data->entry, &video->video_device_list); | |
1158 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1159 | |
91e13aa3 | 1160 | return status; |
1da177e4 LT |
1161 | } |
1162 | ||
1163 | /* | |
1164 | * Arg: | |
1165 | * video : video bus device | |
1166 | * | |
1167 | * Return: | |
1168 | * none | |
1169 | * | |
1170 | * Enumerate the video device list of the video bus, | |
1171 | * bind the ids with the corresponding video devices | |
1172 | * under the video bus. | |
4be44fcd | 1173 | */ |
1da177e4 | 1174 | |
4be44fcd | 1175 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1176 | { |
ff102ea9 DT |
1177 | struct acpi_video_device *dev; |
1178 | ||
bbac81f5 | 1179 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1180 | |
1181 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1182 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1183 | |
bbac81f5 | 1184 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1185 | } |
1186 | ||
1187 | /* | |
1188 | * Arg: | |
1189 | * video : video bus device | |
1190 | * device : video output device under the video | |
1191 | * bus | |
1192 | * | |
1193 | * Return: | |
1194 | * none | |
1195 | * | |
1196 | * Bind the ids with the corresponding video devices | |
1197 | * under the video bus. | |
4be44fcd | 1198 | */ |
1da177e4 LT |
1199 | |
1200 | static void | |
4be44fcd LB |
1201 | acpi_video_device_bind(struct acpi_video_bus *video, |
1202 | struct acpi_video_device *device) | |
1da177e4 | 1203 | { |
78eed028 | 1204 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1205 | int i; |
1da177e4 | 1206 | |
78eed028 DT |
1207 | for (i = 0; i < video->attached_count; i++) { |
1208 | ids = &video->attached_array[i]; | |
1209 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1210 | ids->bind_info = device; | |
1da177e4 LT |
1211 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1212 | } | |
1213 | } | |
1da177e4 LT |
1214 | } |
1215 | ||
1216 | /* | |
1217 | * Arg: | |
1218 | * video : video bus device | |
1219 | * | |
1220 | * Return: | |
1221 | * < 0 : error | |
1222 | * | |
1223 | * Call _DOD to enumerate all devices attached to display adapter | |
1224 | * | |
4be44fcd | 1225 | */ |
1da177e4 LT |
1226 | |
1227 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1228 | { | |
4be44fcd LB |
1229 | int status; |
1230 | int count; | |
1231 | int i; | |
78eed028 | 1232 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1233 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1234 | union acpi_object *dod = NULL; | |
1235 | union acpi_object *obj; | |
1da177e4 | 1236 | |
90130268 | 1237 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1238 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1239 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1240 | return status; |
1da177e4 LT |
1241 | } |
1242 | ||
50dd0969 | 1243 | dod = buffer.pointer; |
1da177e4 | 1244 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1245 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1246 | status = -EFAULT; |
1247 | goto out; | |
1248 | } | |
1249 | ||
1250 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1251 | dod->package.count)); |
1da177e4 | 1252 | |
78eed028 DT |
1253 | active_list = kcalloc(1 + dod->package.count, |
1254 | sizeof(struct acpi_video_enumerated_device), | |
1255 | GFP_KERNEL); | |
1256 | if (!active_list) { | |
1da177e4 LT |
1257 | status = -ENOMEM; |
1258 | goto out; | |
1259 | } | |
1260 | ||
1261 | count = 0; | |
1262 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1263 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1264 | |
1265 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1266 | printk(KERN_ERR PREFIX |
1267 | "Invalid _DOD data in element %d\n", i); | |
1268 | continue; | |
1da177e4 | 1269 | } |
78eed028 DT |
1270 | |
1271 | active_list[count].value.int_val = obj->integer.value; | |
1272 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1273 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1274 | (int)obj->integer.value)); | |
1da177e4 LT |
1275 | count++; |
1276 | } | |
1da177e4 | 1277 | |
6044ec88 | 1278 | kfree(video->attached_array); |
4be44fcd | 1279 | |
78eed028 | 1280 | video->attached_array = active_list; |
1da177e4 | 1281 | video->attached_count = count; |
78eed028 DT |
1282 | |
1283 | out: | |
02438d87 | 1284 | kfree(buffer.pointer); |
d550d98d | 1285 | return status; |
1da177e4 LT |
1286 | } |
1287 | ||
4be44fcd LB |
1288 | static int |
1289 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1290 | u32 level_current, u32 event) | |
1da177e4 | 1291 | { |
63f0edfc | 1292 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1293 | max = max_below = 0; |
1294 | min = min_above = 255; | |
63f0edfc | 1295 | /* Find closest level to level_current */ |
0a3db1ce | 1296 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1297 | l = device->brightness->levels[i]; |
1298 | if (abs(l - level_current) < abs(delta)) { | |
1299 | delta = l - level_current; | |
1300 | if (!delta) | |
1301 | break; | |
1302 | } | |
1303 | } | |
1304 | /* Ajust level_current to closest available level */ | |
1305 | level_current += delta; | |
0a3db1ce | 1306 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1307 | l = device->brightness->levels[i]; |
1308 | if (l < min) | |
1309 | min = l; | |
1310 | if (l > max) | |
1311 | max = l; | |
1312 | if (l < min_above && l > level_current) | |
1313 | min_above = l; | |
1314 | if (l > max_below && l < level_current) | |
1315 | max_below = l; | |
1316 | } | |
1317 | ||
1318 | switch (event) { | |
1319 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1320 | return (level_current < max) ? min_above : min; | |
1321 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1322 | return (level_current < max) ? min_above : max; | |
1323 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1324 | return (level_current > min) ? max_below : min; | |
1325 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1326 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1327 | return 0; | |
1328 | default: | |
1329 | return level_current; | |
1330 | } | |
1da177e4 LT |
1331 | } |
1332 | ||
c8890f90 | 1333 | static int |
4be44fcd | 1334 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1335 | { |
27663c58 | 1336 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1337 | int result = -EINVAL; |
1338 | ||
28c32e99 ZR |
1339 | /* no warning message if acpi_backlight=vendor is used */ |
1340 | if (!acpi_video_backlight_support()) | |
1341 | return 0; | |
1342 | ||
469778c1 | 1343 | if (!device->brightness) |
c8890f90 ZR |
1344 | goto out; |
1345 | ||
1346 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1347 | &level_current, |
1348 | false); | |
c8890f90 ZR |
1349 | if (result) |
1350 | goto out; | |
1351 | ||
1da177e4 | 1352 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1353 | |
24450c7a | 1354 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1355 | |
36342742 MG |
1356 | if (!result) |
1357 | backlight_force_update(device->backlight, | |
1358 | BACKLIGHT_UPDATE_HOTKEY); | |
1359 | ||
c8890f90 ZR |
1360 | out: |
1361 | if (result) | |
1362 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1363 | ||
1364 | return result; | |
1da177e4 LT |
1365 | } |
1366 | ||
e92a7162 MG |
1367 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1368 | void **edid) | |
1369 | { | |
1370 | struct acpi_video_bus *video; | |
1371 | struct acpi_video_device *video_device; | |
1372 | union acpi_object *buffer = NULL; | |
1373 | acpi_status status; | |
1374 | int i, length; | |
1375 | ||
1376 | if (!device || !acpi_driver_data(device)) | |
1377 | return -EINVAL; | |
1378 | ||
1379 | video = acpi_driver_data(device); | |
1380 | ||
1381 | for (i = 0; i < video->attached_count; i++) { | |
1382 | video_device = video->attached_array[i].bind_info; | |
1383 | length = 256; | |
1384 | ||
1385 | if (!video_device) | |
1386 | continue; | |
1387 | ||
82069552 ZR |
1388 | if (!video_device->cap._DDC) |
1389 | continue; | |
1390 | ||
e92a7162 MG |
1391 | if (type) { |
1392 | switch (type) { | |
1393 | case ACPI_VIDEO_DISPLAY_CRT: | |
1394 | if (!video_device->flags.crt) | |
1395 | continue; | |
1396 | break; | |
1397 | case ACPI_VIDEO_DISPLAY_TV: | |
1398 | if (!video_device->flags.tvout) | |
1399 | continue; | |
1400 | break; | |
1401 | case ACPI_VIDEO_DISPLAY_DVI: | |
1402 | if (!video_device->flags.dvi) | |
1403 | continue; | |
1404 | break; | |
1405 | case ACPI_VIDEO_DISPLAY_LCD: | |
1406 | if (!video_device->flags.lcd) | |
1407 | continue; | |
1408 | break; | |
1409 | } | |
1410 | } else if (video_device->device_id != device_id) { | |
1411 | continue; | |
1412 | } | |
1413 | ||
1414 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1415 | ||
1416 | if (ACPI_FAILURE(status) || !buffer || | |
1417 | buffer->type != ACPI_TYPE_BUFFER) { | |
1418 | length = 128; | |
1419 | status = acpi_video_device_EDID(video_device, &buffer, | |
1420 | length); | |
1421 | if (ACPI_FAILURE(status) || !buffer || | |
1422 | buffer->type != ACPI_TYPE_BUFFER) { | |
1423 | continue; | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | *edid = buffer->buffer.pointer; | |
1428 | return length; | |
1429 | } | |
1430 | ||
1431 | return -ENODEV; | |
1432 | } | |
1433 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1434 | ||
1da177e4 | 1435 | static int |
4be44fcd LB |
1436 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1437 | struct acpi_device *device) | |
1da177e4 | 1438 | { |
fba4e087 | 1439 | int status = 0; |
ff102ea9 | 1440 | struct acpi_device *dev; |
1da177e4 | 1441 | |
fba4e087 IM |
1442 | /* |
1443 | * There are systems where video module known to work fine regardless | |
1444 | * of broken _DOD and ignoring returned value here doesn't cause | |
1445 | * any issues later. | |
1446 | */ | |
1447 | acpi_video_device_enumerate(video); | |
1da177e4 | 1448 | |
ff102ea9 | 1449 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1450 | |
1451 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1452 | if (status) { |
91e13aa3 AL |
1453 | dev_err(&dev->dev, "Can't attach device\n"); |
1454 | break; | |
1da177e4 | 1455 | } |
1da177e4 | 1456 | } |
d550d98d | 1457 | return status; |
1da177e4 LT |
1458 | } |
1459 | ||
4be44fcd | 1460 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
1da177e4 | 1461 | { |
031ec77b | 1462 | acpi_status status; |
1da177e4 LT |
1463 | |
1464 | if (!device || !device->video) | |
d550d98d | 1465 | return -ENOENT; |
1da177e4 | 1466 | |
91e13aa3 AL |
1467 | if (device->flags.notify) { |
1468 | status = acpi_remove_notify_handler(device->dev->handle, | |
1469 | ACPI_DEVICE_NOTIFY, acpi_video_device_notify); | |
1470 | if (ACPI_FAILURE(status)) | |
1471 | dev_err(&device->dev->dev, | |
1472 | "Can't remove video notify handler\n"); | |
cfa806f0 | 1473 | } |
91e13aa3 | 1474 | |
e29b3ee3 | 1475 | if (device->backlight) { |
e29b3ee3 KP |
1476 | backlight_device_unregister(device->backlight); |
1477 | device->backlight = NULL; | |
1478 | } | |
4a703a8f | 1479 | if (device->cooling_dev) { |
702ed512 ZR |
1480 | sysfs_remove_link(&device->dev->dev.kobj, |
1481 | "thermal_cooling"); | |
4a703a8f | 1482 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
702ed512 | 1483 | "device"); |
4a703a8f DT |
1484 | thermal_cooling_device_unregister(device->cooling_dev); |
1485 | device->cooling_dev = NULL; | |
702ed512 | 1486 | } |
ff102ea9 | 1487 | |
d550d98d | 1488 | return 0; |
1da177e4 LT |
1489 | } |
1490 | ||
4be44fcd | 1491 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1da177e4 | 1492 | { |
4be44fcd | 1493 | int status; |
ff102ea9 | 1494 | struct acpi_video_device *dev, *next; |
1da177e4 | 1495 | |
bbac81f5 | 1496 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1497 | |
ff102ea9 | 1498 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
1da177e4 | 1499 | |
ff102ea9 | 1500 | status = acpi_video_bus_put_one_device(dev); |
4be44fcd LB |
1501 | if (ACPI_FAILURE(status)) |
1502 | printk(KERN_WARNING PREFIX | |
1503 | "hhuuhhuu bug in acpi video driver.\n"); | |
1da177e4 | 1504 | |
ff102ea9 DT |
1505 | if (dev->brightness) { |
1506 | kfree(dev->brightness->levels); | |
1507 | kfree(dev->brightness); | |
1508 | } | |
1509 | list_del(&dev->entry); | |
1510 | kfree(dev); | |
1da177e4 LT |
1511 | } |
1512 | ||
bbac81f5 | 1513 | mutex_unlock(&video->device_list_lock); |
ff102ea9 | 1514 | |
d550d98d | 1515 | return 0; |
1da177e4 LT |
1516 | } |
1517 | ||
1518 | /* acpi_video interface */ | |
1519 | ||
4be44fcd | 1520 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1521 | { |
a21101c4 | 1522 | return acpi_video_bus_DOS(video, 0, 0); |
1da177e4 LT |
1523 | } |
1524 | ||
4be44fcd | 1525 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 LT |
1526 | { |
1527 | return acpi_video_bus_DOS(video, 0, 1); | |
1528 | } | |
1529 | ||
7015558f | 1530 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1531 | { |
7015558f | 1532 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1533 | struct input_dev *input; |
17c452f9 | 1534 | int keycode = 0; |
e9dab196 | 1535 | |
1da177e4 | 1536 | if (!video) |
d550d98d | 1537 | return; |
1da177e4 | 1538 | |
e9dab196 | 1539 | input = video->input; |
1da177e4 LT |
1540 | |
1541 | switch (event) { | |
98fb8fe1 | 1542 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1543 | * most likely via hotkey. */ |
14e04fb3 | 1544 | acpi_bus_generate_proc_event(device, event, 0); |
8a37c65d | 1545 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1546 | break; |
1547 | ||
98fb8fe1 | 1548 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1549 | * connector. */ |
1550 | acpi_video_device_enumerate(video); | |
1551 | acpi_video_device_rebind(video); | |
14e04fb3 | 1552 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1553 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1554 | break; |
1555 | ||
4be44fcd | 1556 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
25c87f7f | 1557 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1558 | keycode = KEY_SWITCHVIDEOMODE; |
1559 | break; | |
4be44fcd | 1560 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
25c87f7f | 1561 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1562 | keycode = KEY_VIDEO_NEXT; |
1563 | break; | |
4be44fcd | 1564 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
14e04fb3 | 1565 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1566 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1567 | break; |
1568 | ||
1569 | default: | |
1570 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1571 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1572 | break; |
1573 | } | |
1574 | ||
8a37c65d LT |
1575 | if (acpi_notifier_call_chain(device, event, 0)) |
1576 | /* Something vetoed the keypress. */ | |
1577 | keycode = 0; | |
17c452f9 MG |
1578 | |
1579 | if (keycode) { | |
1580 | input_report_key(input, keycode, 1); | |
1581 | input_sync(input); | |
1582 | input_report_key(input, keycode, 0); | |
1583 | input_sync(input); | |
1584 | } | |
e9dab196 | 1585 | |
d550d98d | 1586 | return; |
1da177e4 LT |
1587 | } |
1588 | ||
4be44fcd | 1589 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1590 | { |
50dd0969 | 1591 | struct acpi_video_device *video_device = data; |
4be44fcd | 1592 | struct acpi_device *device = NULL; |
e9dab196 LY |
1593 | struct acpi_video_bus *bus; |
1594 | struct input_dev *input; | |
17c452f9 | 1595 | int keycode = 0; |
1da177e4 | 1596 | |
1da177e4 | 1597 | if (!video_device) |
d550d98d | 1598 | return; |
1da177e4 | 1599 | |
e6afa0de | 1600 | device = video_device->dev; |
e9dab196 LY |
1601 | bus = video_device->video; |
1602 | input = bus->input; | |
1da177e4 LT |
1603 | |
1604 | switch (event) { | |
4be44fcd | 1605 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1606 | if (brightness_switch_enabled) |
1607 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1608 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1609 | keycode = KEY_BRIGHTNESS_CYCLE; |
1610 | break; | |
4be44fcd | 1611 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1612 | if (brightness_switch_enabled) |
1613 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1614 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1615 | keycode = KEY_BRIGHTNESSUP; |
1616 | break; | |
4be44fcd | 1617 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1618 | if (brightness_switch_enabled) |
1619 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1620 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1621 | keycode = KEY_BRIGHTNESSDOWN; |
1622 | break; | |
70f23fd6 | 1623 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1624 | if (brightness_switch_enabled) |
1625 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1626 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1627 | keycode = KEY_BRIGHTNESS_ZERO; |
1628 | break; | |
4be44fcd | 1629 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1630 | if (brightness_switch_enabled) |
1631 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1632 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1633 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1634 | break; |
1635 | default: | |
1636 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1637 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1638 | break; |
1639 | } | |
e9dab196 | 1640 | |
7761f638 | 1641 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1642 | |
1643 | if (keycode) { | |
1644 | input_report_key(input, keycode, 1); | |
1645 | input_sync(input); | |
1646 | input_report_key(input, keycode, 0); | |
1647 | input_sync(input); | |
1648 | } | |
e9dab196 | 1649 | |
d550d98d | 1650 | return; |
1da177e4 LT |
1651 | } |
1652 | ||
ac7729da RW |
1653 | static int acpi_video_resume(struct notifier_block *nb, |
1654 | unsigned long val, void *ign) | |
863c1490 MG |
1655 | { |
1656 | struct acpi_video_bus *video; | |
1657 | struct acpi_video_device *video_device; | |
1658 | int i; | |
1659 | ||
ac7729da RW |
1660 | switch (val) { |
1661 | case PM_HIBERNATION_PREPARE: | |
1662 | case PM_SUSPEND_PREPARE: | |
1663 | case PM_RESTORE_PREPARE: | |
1664 | return NOTIFY_DONE; | |
1665 | } | |
863c1490 | 1666 | |
ac7729da RW |
1667 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1668 | ||
1669 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1670 | |
1671 | for (i = 0; i < video->attached_count; i++) { | |
1672 | video_device = video->attached_array[i].bind_info; | |
1673 | if (video_device && video_device->backlight) | |
1674 | acpi_video_set_brightness(video_device->backlight); | |
1675 | } | |
ac7729da RW |
1676 | |
1677 | return NOTIFY_OK; | |
863c1490 MG |
1678 | } |
1679 | ||
c504f8cb ZR |
1680 | static acpi_status |
1681 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1682 | void **return_value) | |
1683 | { | |
1684 | struct acpi_device *device = context; | |
1685 | struct acpi_device *sibling; | |
1686 | int result; | |
1687 | ||
1688 | if (handle == device->handle) | |
1689 | return AE_CTRL_TERMINATE; | |
1690 | ||
1691 | result = acpi_bus_get_device(handle, &sibling); | |
1692 | if (result) | |
1693 | return AE_OK; | |
1694 | ||
1695 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1696 | return AE_ALREADY_EXISTS; | |
1697 | ||
1698 | return AE_OK; | |
1699 | } | |
1700 | ||
ac7729da RW |
1701 | static int instance; |
1702 | ||
4be44fcd | 1703 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1704 | { |
f51e8391 | 1705 | struct acpi_video_bus *video; |
e9dab196 | 1706 | struct input_dev *input; |
f51e8391 | 1707 | int error; |
c504f8cb ZR |
1708 | acpi_status status; |
1709 | ||
1710 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1711 | device->parent->handle, 1, | |
1712 | acpi_video_bus_match, NULL, | |
1713 | device, NULL); | |
1714 | if (status == AE_ALREADY_EXISTS) { | |
1715 | printk(KERN_WARNING FW_BUG | |
1716 | "Duplicate ACPI video bus devices for the" | |
1717 | " same VGA controller, please try module " | |
1718 | "parameter \"video.allow_duplicates=1\"" | |
1719 | "if the current driver doesn't work.\n"); | |
1720 | if (!allow_duplicates) | |
1721 | return -ENODEV; | |
1722 | } | |
1da177e4 | 1723 | |
36bcbec7 | 1724 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1725 | if (!video) |
d550d98d | 1726 | return -ENOMEM; |
1da177e4 | 1727 | |
e6d9da1d ZR |
1728 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1729 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1730 | if (instance) | |
1731 | device->pnp.bus_id[3] = '0' + instance; | |
1732 | instance ++; | |
1733 | } | |
f3b39f13 ZY |
1734 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1735 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1736 | if (instance) | |
1737 | device->pnp.bus_id[3] = '0' + instance; | |
1738 | instance++; | |
1739 | } | |
e6d9da1d | 1740 | |
e6afa0de | 1741 | video->device = device; |
1da177e4 LT |
1742 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1743 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1744 | device->driver_data = video; |
1da177e4 LT |
1745 | |
1746 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1747 | error = acpi_video_bus_check(video); |
1748 | if (error) | |
1749 | goto err_free_video; | |
1da177e4 | 1750 | |
bbac81f5 | 1751 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1752 | INIT_LIST_HEAD(&video->video_device_list); |
1753 | ||
ea9f8856 IM |
1754 | error = acpi_video_bus_get_devices(video, device); |
1755 | if (error) | |
91e13aa3 | 1756 | goto err_put_video; |
1da177e4 | 1757 | |
e9dab196 | 1758 | video->input = input = input_allocate_device(); |
f51e8391 DT |
1759 | if (!input) { |
1760 | error = -ENOMEM; | |
b60e7f61 | 1761 | goto err_put_video; |
f51e8391 | 1762 | } |
e9dab196 | 1763 | |
b60e7f61 IM |
1764 | error = acpi_video_bus_start_devices(video); |
1765 | if (error) | |
1766 | goto err_free_input_dev; | |
1767 | ||
e9dab196 LY |
1768 | snprintf(video->phys, sizeof(video->phys), |
1769 | "%s/video/input0", acpi_device_hid(video->device)); | |
1770 | ||
1771 | input->name = acpi_device_name(video->device); | |
1772 | input->phys = video->phys; | |
1773 | input->id.bustype = BUS_HOST; | |
1774 | input->id.product = 0x06; | |
91c05c66 | 1775 | input->dev.parent = &device->dev; |
e9dab196 LY |
1776 | input->evbit[0] = BIT(EV_KEY); |
1777 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1778 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1779 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1780 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1781 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1782 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1783 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1784 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
e9dab196 | 1785 | |
1da177e4 | 1786 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1787 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1788 | video->flags.multihead ? "yes" : "no", | |
1789 | video->flags.rom ? "yes" : "no", | |
1790 | video->flags.post ? "yes" : "no"); | |
1da177e4 | 1791 | |
ac7729da RW |
1792 | video->pm_nb.notifier_call = acpi_video_resume; |
1793 | video->pm_nb.priority = 0; | |
ea9f8856 IM |
1794 | error = register_pm_notifier(&video->pm_nb); |
1795 | if (error) | |
301f33fb DC |
1796 | goto err_stop_video; |
1797 | ||
1798 | error = input_register_device(input); | |
1799 | if (error) | |
1800 | goto err_unregister_pm_notifier; | |
ac7729da | 1801 | |
f51e8391 DT |
1802 | return 0; |
1803 | ||
301f33fb DC |
1804 | err_unregister_pm_notifier: |
1805 | unregister_pm_notifier(&video->pm_nb); | |
f51e8391 DT |
1806 | err_stop_video: |
1807 | acpi_video_bus_stop_devices(video); | |
b60e7f61 IM |
1808 | err_free_input_dev: |
1809 | input_free_device(input); | |
ea9f8856 | 1810 | err_put_video: |
f51e8391 DT |
1811 | acpi_video_bus_put_devices(video); |
1812 | kfree(video->attached_array); | |
f51e8391 DT |
1813 | err_free_video: |
1814 | kfree(video); | |
db89b4f0 | 1815 | device->driver_data = NULL; |
1da177e4 | 1816 | |
f51e8391 | 1817 | return error; |
1da177e4 LT |
1818 | } |
1819 | ||
51fac838 | 1820 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1821 | { |
4be44fcd | 1822 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1823 | |
1da177e4 LT |
1824 | |
1825 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1826 | return -EINVAL; |
1da177e4 | 1827 | |
50dd0969 | 1828 | video = acpi_driver_data(device); |
1da177e4 | 1829 | |
ac7729da RW |
1830 | unregister_pm_notifier(&video->pm_nb); |
1831 | ||
1da177e4 | 1832 | acpi_video_bus_stop_devices(video); |
1da177e4 | 1833 | acpi_video_bus_put_devices(video); |
1da177e4 | 1834 | |
e9dab196 | 1835 | input_unregister_device(video->input); |
6044ec88 | 1836 | kfree(video->attached_array); |
1da177e4 LT |
1837 | kfree(video); |
1838 | ||
d550d98d | 1839 | return 0; |
1da177e4 LT |
1840 | } |
1841 | ||
c6996bdd AC |
1842 | static int __init is_i740(struct pci_dev *dev) |
1843 | { | |
1844 | if (dev->device == 0x00D1) | |
1845 | return 1; | |
1846 | if (dev->device == 0x7000) | |
1847 | return 1; | |
1848 | return 0; | |
1849 | } | |
1850 | ||
74a365b3 MG |
1851 | static int __init intel_opregion_present(void) |
1852 | { | |
c6996bdd | 1853 | int opregion = 0; |
74a365b3 MG |
1854 | struct pci_dev *dev = NULL; |
1855 | u32 address; | |
1856 | ||
1857 | for_each_pci_dev(dev) { | |
1858 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1859 | continue; | |
1860 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1861 | continue; | |
c6996bdd AC |
1862 | /* We don't want to poke around undefined i740 registers */ |
1863 | if (is_i740(dev)) | |
1864 | continue; | |
74a365b3 MG |
1865 | pci_read_config_dword(dev, 0xfc, &address); |
1866 | if (!address) | |
1867 | continue; | |
c6996bdd | 1868 | opregion = 1; |
74a365b3 | 1869 | } |
c6996bdd | 1870 | return opregion; |
74a365b3 MG |
1871 | } |
1872 | ||
1873 | int acpi_video_register(void) | |
1da177e4 | 1874 | { |
4be44fcd | 1875 | int result = 0; |
86e437f0 ZY |
1876 | if (register_count) { |
1877 | /* | |
1878 | * if the function of acpi_video_register is already called, | |
1879 | * don't register the acpi_vide_bus again and return no error. | |
1880 | */ | |
1881 | return 0; | |
1882 | } | |
1da177e4 | 1883 | |
1da177e4 | 1884 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1885 | if (result < 0) |
d550d98d | 1886 | return -ENODEV; |
1da177e4 | 1887 | |
86e437f0 ZY |
1888 | /* |
1889 | * When the acpi_video_bus is loaded successfully, increase | |
1890 | * the counter reference. | |
1891 | */ | |
1892 | register_count = 1; | |
1893 | ||
d550d98d | 1894 | return 0; |
1da177e4 | 1895 | } |
74a365b3 MG |
1896 | EXPORT_SYMBOL(acpi_video_register); |
1897 | ||
86e437f0 ZY |
1898 | void acpi_video_unregister(void) |
1899 | { | |
1900 | if (!register_count) { | |
1901 | /* | |
1902 | * If the acpi video bus is already unloaded, don't | |
1903 | * unload it again and return directly. | |
1904 | */ | |
1905 | return; | |
1906 | } | |
1907 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1908 | ||
86e437f0 ZY |
1909 | register_count = 0; |
1910 | ||
1911 | return; | |
1912 | } | |
1913 | EXPORT_SYMBOL(acpi_video_unregister); | |
1914 | ||
74a365b3 MG |
1915 | /* |
1916 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1917 | * the video opregion code to be run first in order to initialise | |
1918 | * state before any ACPI video calls are made. To handle this we defer | |
1919 | * registration of the video class until the opregion code has run. | |
1920 | */ | |
1921 | ||
1922 | static int __init acpi_video_init(void) | |
1923 | { | |
45cb50e6 ZR |
1924 | dmi_check_system(video_dmi_table); |
1925 | ||
74a365b3 MG |
1926 | if (intel_opregion_present()) |
1927 | return 0; | |
1928 | ||
1929 | return acpi_video_register(); | |
1930 | } | |
1da177e4 | 1931 | |
86e437f0 | 1932 | static void __exit acpi_video_exit(void) |
1da177e4 | 1933 | { |
86e437f0 | 1934 | acpi_video_unregister(); |
1da177e4 | 1935 | |
d550d98d | 1936 | return; |
1da177e4 LT |
1937 | } |
1938 | ||
1939 | module_init(acpi_video_init); | |
1940 | module_exit(acpi_video_exit); |