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 | |
8c5bd7ad RW |
47 | #include "internal.h" |
48 | ||
a192a958 LB |
49 | #define PREFIX "ACPI: " |
50 | ||
1da177e4 LT |
51 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
52 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
53 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
54 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
55 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
56 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
57 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
58 | ||
f4715189 TT |
59 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
60 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
61 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
62 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
63 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 64 | |
2f3d000a | 65 | #define MAX_NAME_LEN 20 |
1da177e4 | 66 | |
1da177e4 | 67 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 68 | ACPI_MODULE_NAME("video"); |
1da177e4 | 69 | |
f52fd66d | 70 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 71 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
72 | MODULE_LICENSE("GPL"); |
73 | ||
90ab5ee9 | 74 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
75 | module_param(brightness_switch_enabled, bool, 0644); |
76 | ||
c504f8cb ZR |
77 | /* |
78 | * By default, we don't allow duplicate ACPI video bus devices | |
79 | * under the same VGA controller | |
80 | */ | |
90ab5ee9 | 81 | static bool allow_duplicates; |
c504f8cb ZR |
82 | module_param(allow_duplicates, bool, 0644); |
83 | ||
99fd1895 ZR |
84 | /* |
85 | * Some BIOSes claim they use minimum backlight at boot, | |
86 | * and this may bring dimming screen after boot | |
87 | */ | |
90ab5ee9 | 88 | static bool use_bios_initial_backlight = 1; |
99fd1895 ZR |
89 | module_param(use_bios_initial_backlight, bool, 0644); |
90 | ||
86e437f0 | 91 | static int register_count = 0; |
4be44fcd | 92 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 93 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 94 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 95 | |
1ba90e3a TR |
96 | static const struct acpi_device_id video_device_ids[] = { |
97 | {ACPI_VIDEO_HID, 0}, | |
98 | {"", 0}, | |
99 | }; | |
100 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
101 | ||
1da177e4 | 102 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 103 | .name = "video", |
1da177e4 | 104 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 105 | .ids = video_device_ids, |
1da177e4 LT |
106 | .ops = { |
107 | .add = acpi_video_bus_add, | |
108 | .remove = acpi_video_bus_remove, | |
7015558f | 109 | .notify = acpi_video_bus_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | struct acpi_video_bus_flags { | |
4be44fcd LB |
114 | u8 multihead:1; /* can switch video heads */ |
115 | u8 rom:1; /* can retrieve a video rom */ | |
116 | u8 post:1; /* can configure the head to */ | |
117 | u8 reserved:5; | |
1da177e4 LT |
118 | }; |
119 | ||
120 | struct acpi_video_bus_cap { | |
4be44fcd LB |
121 | u8 _DOS:1; /*Enable/Disable output switching */ |
122 | u8 _DOD:1; /*Enumerate all devices attached to display adapter */ | |
123 | u8 _ROM:1; /*Get ROM Data */ | |
124 | u8 _GPD:1; /*Get POST Device */ | |
125 | u8 _SPD:1; /*Set POST Device */ | |
126 | u8 _VPO:1; /*Video POST Options */ | |
127 | u8 reserved:2; | |
1da177e4 LT |
128 | }; |
129 | ||
4be44fcd LB |
130 | struct acpi_video_device_attrib { |
131 | u32 display_index:4; /* A zero-based instance of the Display */ | |
98fb8fe1 | 132 | u32 display_port_attachment:4; /*This field differentiates the display type */ |
4be44fcd | 133 | u32 display_type:4; /*Describe the specific type in use */ |
98fb8fe1 | 134 | u32 vendor_specific:4; /*Chipset Vendor Specific */ |
4be44fcd LB |
135 | u32 bios_can_detect:1; /*BIOS can detect the device */ |
136 | u32 depend_on_vga:1; /*Non-VGA output device whose power is related to | |
137 | the VGA device. */ | |
138 | u32 pipe_id:3; /*For VGA multiple-head devices. */ | |
139 | u32 reserved:10; /*Must be 0 */ | |
140 | u32 device_id_scheme:1; /*Device ID Scheme */ | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_video_enumerated_device { | |
144 | union { | |
145 | u32 int_val; | |
4be44fcd | 146 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
147 | } value; |
148 | struct acpi_video_device *bind_info; | |
149 | }; | |
150 | ||
151 | struct acpi_video_bus { | |
e6afa0de | 152 | struct acpi_device *device; |
4be44fcd | 153 | u8 dos_setting; |
1da177e4 | 154 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
155 | u8 attached_count; |
156 | struct acpi_video_bus_cap cap; | |
1da177e4 | 157 | struct acpi_video_bus_flags flags; |
4be44fcd | 158 | struct list_head video_device_list; |
bbac81f5 | 159 | struct mutex device_list_lock; /* protects video_device_list */ |
e9dab196 LY |
160 | struct input_dev *input; |
161 | char phys[32]; /* for input device */ | |
ac7729da | 162 | struct notifier_block pm_nb; |
1da177e4 LT |
163 | }; |
164 | ||
165 | struct acpi_video_device_flags { | |
4be44fcd LB |
166 | u8 crt:1; |
167 | u8 lcd:1; | |
168 | u8 tvout:1; | |
82cae999 | 169 | u8 dvi:1; |
4be44fcd LB |
170 | u8 bios:1; |
171 | u8 unknown:1; | |
91e13aa3 AL |
172 | u8 notify:1; |
173 | u8 reserved:1; | |
1da177e4 LT |
174 | }; |
175 | ||
176 | struct acpi_video_device_cap { | |
4be44fcd LB |
177 | u8 _ADR:1; /*Return the unique ID */ |
178 | u8 _BCL:1; /*Query list of brightness control levels supported */ | |
179 | u8 _BCM:1; /*Set the brightness level */ | |
2f3d000a | 180 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 181 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
4be44fcd | 182 | u8 _DDC:1; /*Return the EDID for this device */ |
1da177e4 LT |
183 | }; |
184 | ||
d32f6947 ZR |
185 | struct acpi_video_brightness_flags { |
186 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
d80fb99f | 187 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/ |
1a7c618a ZR |
188 | u8 _BCL_use_index:1; /* levels in _BCL are index values */ |
189 | u8 _BCM_use_index:1; /* input of _BCM is an index value */ | |
190 | u8 _BQC_use_index:1; /* _BQC returns an index value */ | |
d32f6947 ZR |
191 | }; |
192 | ||
1da177e4 | 193 | struct acpi_video_device_brightness { |
4be44fcd LB |
194 | int curr; |
195 | int count; | |
196 | int *levels; | |
d32f6947 | 197 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
198 | }; |
199 | ||
200 | struct acpi_video_device { | |
4be44fcd LB |
201 | unsigned long device_id; |
202 | struct acpi_video_device_flags flags; | |
203 | struct acpi_video_device_cap cap; | |
204 | struct list_head entry; | |
205 | struct acpi_video_bus *video; | |
206 | struct acpi_device *dev; | |
1da177e4 | 207 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 208 | struct backlight_device *backlight; |
4a703a8f | 209 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
210 | }; |
211 | ||
b7171ae7 | 212 | static const char device_decode[][30] = { |
1da177e4 LT |
213 | "motherboard VGA device", |
214 | "PCI VGA device", | |
215 | "AGP VGA device", | |
216 | "UNKNOWN", | |
217 | }; | |
218 | ||
4be44fcd LB |
219 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
220 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
221 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
222 | struct acpi_video_device *device); | |
1da177e4 | 223 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
224 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
225 | int level); | |
226 | static int acpi_video_device_lcd_get_level_current( | |
227 | struct acpi_video_device *device, | |
a89803df | 228 | unsigned long long *level, bool raw); |
4be44fcd LB |
229 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
230 | u32 level_current, u32 event); | |
c8890f90 | 231 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 232 | int event); |
1da177e4 | 233 | |
2f3d000a YL |
234 | /*backlight device sysfs support*/ |
235 | static int acpi_video_get_brightness(struct backlight_device *bd) | |
236 | { | |
27663c58 | 237 | unsigned long long cur_level; |
38531e6f | 238 | int i; |
2f3d000a | 239 | struct acpi_video_device *vd = |
655bfd7a | 240 | (struct acpi_video_device *)bl_get_data(bd); |
c8890f90 | 241 | |
a89803df | 242 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 243 | return -EINVAL; |
38531e6f MG |
244 | for (i = 2; i < vd->brightness->count; i++) { |
245 | if (vd->brightness->levels[i] == cur_level) | |
246 | /* The first two entries are special - see page 575 | |
247 | of the ACPI spec 3.0 */ | |
248 | return i-2; | |
249 | } | |
250 | return 0; | |
2f3d000a YL |
251 | } |
252 | ||
253 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
254 | { | |
24450c7a | 255 | int request_level = bd->props.brightness + 2; |
2f3d000a | 256 | struct acpi_video_device *vd = |
655bfd7a | 257 | (struct acpi_video_device *)bl_get_data(bd); |
24450c7a ZR |
258 | |
259 | return acpi_video_device_lcd_set_level(vd, | |
260 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
261 | } |
262 | ||
acc2472e | 263 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
264 | .get_brightness = acpi_video_get_brightness, |
265 | .update_status = acpi_video_set_brightness, | |
266 | }; | |
267 | ||
702ed512 | 268 | /* thermal cooling device callbacks */ |
4a703a8f | 269 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 270 | long *state) |
702ed512 | 271 | { |
4a703a8f | 272 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
273 | struct acpi_video_device *video = acpi_driver_data(device); |
274 | ||
6503e5df MG |
275 | *state = video->brightness->count - 3; |
276 | return 0; | |
702ed512 ZR |
277 | } |
278 | ||
4a703a8f | 279 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 280 | long *state) |
702ed512 | 281 | { |
4a703a8f | 282 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 283 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 284 | unsigned long long level; |
6503e5df | 285 | int offset; |
702ed512 | 286 | |
a89803df | 287 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 288 | return -EINVAL; |
6503e5df MG |
289 | for (offset = 2; offset < video->brightness->count; offset++) |
290 | if (level == video->brightness->levels[offset]) { | |
291 | *state = video->brightness->count - offset - 1; | |
292 | return 0; | |
293 | } | |
702ed512 ZR |
294 | |
295 | return -EINVAL; | |
296 | } | |
297 | ||
298 | static int | |
4a703a8f | 299 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 300 | { |
4a703a8f | 301 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
302 | struct acpi_video_device *video = acpi_driver_data(device); |
303 | int level; | |
304 | ||
305 | if ( state >= video->brightness->count - 2) | |
306 | return -EINVAL; | |
307 | ||
308 | state = video->brightness->count - state; | |
309 | level = video->brightness->levels[state -1]; | |
310 | return acpi_video_device_lcd_set_level(video, level); | |
311 | } | |
312 | ||
9c8b04be | 313 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
314 | .get_max_state = video_get_max_state, |
315 | .get_cur_state = video_get_cur_state, | |
316 | .set_cur_state = video_set_cur_state, | |
317 | }; | |
318 | ||
1da177e4 LT |
319 | /* -------------------------------------------------------------------------- |
320 | Video Management | |
321 | -------------------------------------------------------------------------- */ | |
322 | ||
1da177e4 | 323 | static int |
4be44fcd LB |
324 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
325 | union acpi_object **levels) | |
1da177e4 | 326 | { |
4be44fcd LB |
327 | int status; |
328 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
329 | union acpi_object *obj; | |
1da177e4 | 330 | |
1da177e4 LT |
331 | |
332 | *levels = NULL; | |
333 | ||
90130268 | 334 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 335 | if (!ACPI_SUCCESS(status)) |
d550d98d | 336 | return status; |
4be44fcd | 337 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 338 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 339 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
340 | status = -EFAULT; |
341 | goto err; | |
342 | } | |
343 | ||
344 | *levels = obj; | |
345 | ||
d550d98d | 346 | return 0; |
1da177e4 | 347 | |
4be44fcd | 348 | err: |
6044ec88 | 349 | kfree(buffer.pointer); |
1da177e4 | 350 | |
d550d98d | 351 | return status; |
1da177e4 LT |
352 | } |
353 | ||
354 | static int | |
4be44fcd | 355 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 356 | { |
24450c7a | 357 | int status; |
4be44fcd LB |
358 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
359 | struct acpi_object_list args = { 1, &arg0 }; | |
9e6dada9 | 360 | int state; |
1da177e4 | 361 | |
1da177e4 | 362 | arg0.integer.value = level; |
1da177e4 | 363 | |
24450c7a ZR |
364 | status = acpi_evaluate_object(device->dev->handle, "_BCM", |
365 | &args, NULL); | |
366 | if (ACPI_FAILURE(status)) { | |
367 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
368 | return -EIO; | |
369 | } | |
370 | ||
4500ca8e | 371 | device->brightness->curr = level; |
9e6dada9 | 372 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 373 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
374 | if (device->backlight) |
375 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
376 | return 0; |
377 | } | |
9e6dada9 | 378 | |
24450c7a ZR |
379 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
380 | return -EINVAL; | |
1da177e4 LT |
381 | } |
382 | ||
45cb50e6 ZR |
383 | /* |
384 | * For some buggy _BQC methods, we need to add a constant value to | |
385 | * the _BQC return value to get the actual current brightness level | |
386 | */ | |
387 | ||
388 | static int bqc_offset_aml_bug_workaround; | |
389 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
390 | { | |
391 | bqc_offset_aml_bug_workaround = 9; | |
392 | return 0; | |
393 | } | |
394 | ||
129ff8f8 ZR |
395 | static int video_ignore_initial_backlight(const struct dmi_system_id *d) |
396 | { | |
397 | use_bios_initial_backlight = 0; | |
398 | return 0; | |
399 | } | |
400 | ||
45cb50e6 ZR |
401 | static struct dmi_system_id video_dmi_table[] __initdata = { |
402 | /* | |
403 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
404 | */ | |
405 | { | |
406 | .callback = video_set_bqc_offset, | |
407 | .ident = "Acer Aspire 5720", | |
408 | .matches = { | |
409 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
410 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
411 | }, | |
412 | }, | |
5afc4abe LB |
413 | { |
414 | .callback = video_set_bqc_offset, | |
415 | .ident = "Acer Aspire 5710Z", | |
416 | .matches = { | |
417 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
418 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
419 | }, | |
420 | }, | |
34ac272b ZR |
421 | { |
422 | .callback = video_set_bqc_offset, | |
423 | .ident = "eMachines E510", | |
424 | .matches = { | |
425 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
426 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
427 | }, | |
428 | }, | |
93bcece2 ZR |
429 | { |
430 | .callback = video_set_bqc_offset, | |
431 | .ident = "Acer Aspire 5315", | |
432 | .matches = { | |
433 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
434 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
435 | }, | |
436 | }, | |
152a4e63 ZR |
437 | { |
438 | .callback = video_set_bqc_offset, | |
439 | .ident = "Acer Aspire 7720", | |
440 | .matches = { | |
441 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
442 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
443 | }, | |
444 | }, | |
129ff8f8 ZR |
445 | { |
446 | .callback = video_ignore_initial_backlight, | |
447 | .ident = "HP Folio 13-2000", | |
448 | .matches = { | |
449 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
450 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), | |
451 | }, | |
452 | }, | |
9657a565 LT |
453 | { |
454 | .callback = video_ignore_initial_backlight, | |
455 | .ident = "Fujitsu E753", | |
456 | .matches = { | |
457 | DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"), | |
458 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"), | |
459 | }, | |
460 | }, | |
771d09b3 GMDV |
461 | { |
462 | .callback = video_ignore_initial_backlight, | |
463 | .ident = "HP Pavilion dm4", | |
464 | .matches = { | |
465 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
466 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), | |
467 | }, | |
468 | }, | |
780a6ec6 AW |
469 | { |
470 | .callback = video_ignore_initial_backlight, | |
471 | .ident = "HP Pavilion g6 Notebook PC", | |
472 | .matches = { | |
473 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
474 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), | |
475 | }, | |
476 | }, | |
4ef366c5 AH |
477 | { |
478 | .callback = video_ignore_initial_backlight, | |
479 | .ident = "HP 1000 Notebook PC", | |
480 | .matches = { | |
481 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
482 | DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), | |
483 | }, | |
484 | }, | |
fedbe9bc AH |
485 | { |
486 | .callback = video_ignore_initial_backlight, | |
487 | .ident = "HP Pavilion m4", | |
488 | .matches = { | |
489 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
490 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), | |
491 | }, | |
492 | }, | |
45cb50e6 ZR |
493 | {} |
494 | }; | |
495 | ||
994fa63c DB |
496 | static unsigned long long |
497 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
498 | unsigned long long bqc_value) | |
499 | { | |
500 | unsigned long long level; | |
501 | ||
502 | if (device->brightness->flags._BQC_use_index) { | |
503 | /* | |
504 | * _BQC returns an index that doesn't account for | |
505 | * the first 2 items with special meaning, so we need | |
506 | * to compensate for that by offsetting ourselves | |
507 | */ | |
508 | if (device->brightness->flags._BCL_reversed) | |
509 | bqc_value = device->brightness->count - 3 - bqc_value; | |
510 | ||
511 | level = device->brightness->levels[bqc_value + 2]; | |
512 | } else { | |
513 | level = bqc_value; | |
514 | } | |
515 | ||
516 | level += bqc_offset_aml_bug_workaround; | |
517 | ||
518 | return level; | |
519 | } | |
520 | ||
1da177e4 | 521 | static int |
4be44fcd | 522 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 523 | unsigned long long *level, bool raw) |
1da177e4 | 524 | { |
c8890f90 | 525 | acpi_status status = AE_OK; |
4e231fa4 | 526 | int i; |
c8890f90 | 527 | |
c60d638e ZR |
528 | if (device->cap._BQC || device->cap._BCQ) { |
529 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
530 | ||
531 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
532 | NULL, level); |
533 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
534 | if (raw) { |
535 | /* | |
536 | * Caller has indicated he wants the raw | |
537 | * value returned by _BQC, so don't furtherly | |
538 | * mess with the value. | |
539 | */ | |
540 | return 0; | |
541 | } | |
542 | ||
994fa63c | 543 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 544 | |
4e231fa4 VS |
545 | for (i = 2; i < device->brightness->count; i++) |
546 | if (device->brightness->levels[i] == *level) { | |
547 | device->brightness->curr = *level; | |
548 | return 0; | |
549 | } | |
a89803df DB |
550 | /* |
551 | * BQC returned an invalid level. | |
552 | * Stop using it. | |
553 | */ | |
554 | ACPI_WARNING((AE_INFO, | |
555 | "%s returned an invalid level", | |
556 | buf)); | |
557 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
558 | } else { |
559 | /* Fixme: | |
560 | * should we return an error or ignore this failure? | |
561 | * dev->brightness->curr is a cached value which stores | |
562 | * the correct current backlight level in most cases. | |
563 | * ACPI video backlight still works w/ buggy _BQC. | |
564 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
565 | */ | |
c60d638e ZR |
566 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
567 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
568 | } |
569 | } | |
570 | ||
4500ca8e | 571 | *level = device->brightness->curr; |
c8890f90 | 572 | return 0; |
1da177e4 LT |
573 | } |
574 | ||
575 | static int | |
4be44fcd LB |
576 | acpi_video_device_EDID(struct acpi_video_device *device, |
577 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 578 | { |
4be44fcd LB |
579 | int status; |
580 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
581 | union acpi_object *obj; | |
582 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
583 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 584 | |
1da177e4 LT |
585 | |
586 | *edid = NULL; | |
587 | ||
588 | if (!device) | |
d550d98d | 589 | return -ENODEV; |
1da177e4 LT |
590 | if (length == 128) |
591 | arg0.integer.value = 1; | |
592 | else if (length == 256) | |
593 | arg0.integer.value = 2; | |
594 | else | |
d550d98d | 595 | return -EINVAL; |
1da177e4 | 596 | |
90130268 | 597 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 598 | if (ACPI_FAILURE(status)) |
d550d98d | 599 | return -ENODEV; |
1da177e4 | 600 | |
50dd0969 | 601 | obj = buffer.pointer; |
1da177e4 LT |
602 | |
603 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
604 | *edid = obj; | |
605 | else { | |
6468463a | 606 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
607 | status = -EFAULT; |
608 | kfree(obj); | |
609 | } | |
610 | ||
d550d98d | 611 | return status; |
1da177e4 LT |
612 | } |
613 | ||
1da177e4 LT |
614 | /* bus */ |
615 | ||
1da177e4 LT |
616 | /* |
617 | * Arg: | |
618 | * video : video bus device pointer | |
619 | * bios_flag : | |
620 | * 0. The system BIOS should NOT automatically switch(toggle) | |
621 | * the active display output. | |
622 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 623 | * active display output. No switch event. |
1da177e4 LT |
624 | * 2. The _DGS value should be locked. |
625 | * 3. The system BIOS should not automatically switch (toggle) the | |
626 | * active display output, but instead generate the display switch | |
627 | * event notify code. | |
628 | * lcd_flag : | |
629 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 630 | * of the LCD when the power changes from AC to DC |
1da177e4 | 631 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 632 | * level of the LCD when the power changes from AC to DC. |
1da177e4 | 633 | * Return Value: |
ea9f8856 | 634 | * -EINVAL wrong arg. |
1da177e4 LT |
635 | */ |
636 | ||
637 | static int | |
4be44fcd | 638 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 639 | { |
ea9f8856 | 640 | acpi_status status; |
4be44fcd LB |
641 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
642 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 643 | |
b0373843 ZR |
644 | if (!video->cap._DOS) |
645 | return 0; | |
1da177e4 | 646 | |
ea9f8856 IM |
647 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
648 | return -EINVAL; | |
1da177e4 LT |
649 | arg0.integer.value = (lcd_flag << 2) | bios_flag; |
650 | video->dos_setting = arg0.integer.value; | |
ea9f8856 IM |
651 | status = acpi_evaluate_object(video->device->handle, "_DOS", |
652 | &args, NULL); | |
653 | if (ACPI_FAILURE(status)) | |
654 | return -EIO; | |
1da177e4 | 655 | |
ea9f8856 | 656 | return 0; |
1da177e4 LT |
657 | } |
658 | ||
935e5f29 ZR |
659 | /* |
660 | * Simple comparison function used to sort backlight levels. | |
661 | */ | |
662 | ||
663 | static int | |
664 | acpi_video_cmp_level(const void *a, const void *b) | |
665 | { | |
666 | return *(int *)a - *(int *)b; | |
667 | } | |
668 | ||
a50188da AL |
669 | /* |
670 | * Decides if _BQC/_BCQ for this system is usable | |
671 | * | |
672 | * We do this by changing the level first and then read out the current | |
673 | * brightness level, if the value does not match, find out if it is using | |
674 | * index. If not, clear the _BQC/_BCQ capability. | |
675 | */ | |
676 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
677 | int max_level, int current_level) | |
678 | { | |
679 | struct acpi_video_device_brightness *br = device->brightness; | |
680 | int result; | |
681 | unsigned long long level; | |
682 | int test_level; | |
683 | ||
684 | /* don't mess with existing known broken systems */ | |
685 | if (bqc_offset_aml_bug_workaround) | |
686 | return 0; | |
687 | ||
688 | /* | |
689 | * Some systems always report current brightness level as maximum | |
690 | * through _BQC, we need to test another value for them. | |
691 | */ | |
b3b301c5 | 692 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
693 | |
694 | result = acpi_video_device_lcd_set_level(device, test_level); | |
695 | if (result) | |
696 | return result; | |
697 | ||
698 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
699 | if (result) | |
700 | return result; | |
701 | ||
702 | if (level != test_level) { | |
703 | /* buggy _BQC found, need to find out if it uses index */ | |
704 | if (level < br->count) { | |
705 | if (br->flags._BCL_reversed) | |
706 | level = br->count - 3 - level; | |
707 | if (br->levels[level + 2] == test_level) | |
708 | br->flags._BQC_use_index = 1; | |
709 | } | |
710 | ||
711 | if (!br->flags._BQC_use_index) | |
712 | device->cap._BQC = device->cap._BCQ = 0; | |
713 | } | |
714 | ||
715 | return 0; | |
716 | } | |
717 | ||
718 | ||
1da177e4 LT |
719 | /* |
720 | * Arg: | |
721 | * device : video output device (LCD, CRT, ..) | |
722 | * | |
723 | * Return Value: | |
469778c1 JJ |
724 | * Maximum brightness level |
725 | * | |
726 | * Allocate and initialize device->brightness. | |
727 | */ | |
728 | ||
729 | static int | |
730 | acpi_video_init_brightness(struct acpi_video_device *device) | |
731 | { | |
732 | union acpi_object *obj = NULL; | |
d32f6947 | 733 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 734 | unsigned long long level, level_old; |
469778c1 JJ |
735 | union acpi_object *o; |
736 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 737 | int result = -EINVAL; |
469778c1 JJ |
738 | |
739 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
740 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
741 | "LCD brightness level\n")); | |
742 | goto out; | |
743 | } | |
744 | ||
745 | if (obj->package.count < 2) | |
746 | goto out; | |
747 | ||
748 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
749 | if (!br) { | |
750 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 751 | result = -ENOMEM; |
469778c1 JJ |
752 | goto out; |
753 | } | |
754 | ||
d32f6947 | 755 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 756 | GFP_KERNEL); |
1a7c618a ZR |
757 | if (!br->levels) { |
758 | result = -ENOMEM; | |
469778c1 | 759 | goto out_free; |
1a7c618a | 760 | } |
469778c1 JJ |
761 | |
762 | for (i = 0; i < obj->package.count; i++) { | |
763 | o = (union acpi_object *)&obj->package.elements[i]; | |
764 | if (o->type != ACPI_TYPE_INTEGER) { | |
765 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
766 | continue; | |
767 | } | |
768 | br->levels[count] = (u32) o->integer.value; | |
769 | ||
770 | if (br->levels[count] > max_level) | |
771 | max_level = br->levels[count]; | |
772 | count++; | |
773 | } | |
774 | ||
d32f6947 ZR |
775 | /* |
776 | * some buggy BIOS don't export the levels | |
777 | * when machine is on AC/Battery in _BCL package. | |
778 | * In this case, the first two elements in _BCL packages | |
779 | * are also supported brightness levels that OS should take care of. | |
780 | */ | |
90af2cf6 ZR |
781 | for (i = 2; i < count; i++) { |
782 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 783 | level_ac_battery++; |
90af2cf6 ZR |
784 | if (br->levels[i] == br->levels[1]) |
785 | level_ac_battery++; | |
786 | } | |
d32f6947 ZR |
787 | |
788 | if (level_ac_battery < 2) { | |
789 | level_ac_battery = 2 - level_ac_battery; | |
790 | br->flags._BCL_no_ac_battery_levels = 1; | |
791 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
792 | br->levels[i] = br->levels[i - level_ac_battery]; | |
793 | count += level_ac_battery; | |
794 | } else if (level_ac_battery > 2) | |
bf6787eb | 795 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 796 | |
d80fb99f ZR |
797 | /* Check if the _BCL package is in a reversed order */ |
798 | if (max_level == br->levels[2]) { | |
799 | br->flags._BCL_reversed = 1; | |
800 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
801 | acpi_video_cmp_level, NULL); | |
802 | } else if (max_level != br->levels[count - 1]) | |
803 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 804 | "Found unordered _BCL package")); |
469778c1 JJ |
805 | |
806 | br->count = count; | |
807 | device->brightness = br; | |
1a7c618a ZR |
808 | |
809 | /* Check the input/output of _BQC/_BCL/_BCM */ | |
810 | if ((max_level < 100) && (max_level <= (count - 2))) | |
811 | br->flags._BCL_use_index = 1; | |
812 | ||
813 | /* | |
814 | * _BCM is always consistent with _BCL, | |
815 | * at least for all the laptops we have ever seen. | |
816 | */ | |
817 | br->flags._BCM_use_index = br->flags._BCL_use_index; | |
818 | ||
819 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ | |
90c53ca4 | 820 | br->curr = level = max_level; |
e047cca6 ZR |
821 | |
822 | if (!device->cap._BQC) | |
823 | goto set_level; | |
824 | ||
a89803df DB |
825 | result = acpi_video_device_lcd_get_level_current(device, |
826 | &level_old, true); | |
1a7c618a ZR |
827 | if (result) |
828 | goto out_free_levels; | |
829 | ||
a50188da | 830 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
831 | if (result) |
832 | goto out_free_levels; | |
a50188da AL |
833 | /* |
834 | * cap._BQC may get cleared due to _BQC is found to be broken | |
835 | * in acpi_video_bqc_quirk, so check again here. | |
836 | */ | |
837 | if (!device->cap._BQC) | |
838 | goto set_level; | |
e047cca6 | 839 | |
994fa63c DB |
840 | if (use_bios_initial_backlight) { |
841 | level = acpi_video_bqc_value_to_level(device, level_old); | |
90c53ca4 | 842 | /* |
994fa63c DB |
843 | * On some buggy laptops, _BQC returns an uninitialized |
844 | * value when invoked for the first time, i.e. | |
845 | * level_old is invalid (no matter whether it's a level | |
846 | * or an index). Set the backlight to max_level in this case. | |
90c53ca4 | 847 | */ |
994fa63c DB |
848 | for (i = 2; i < br->count; i++) |
849 | if (level_old == br->levels[i]) | |
850 | break; | |
851 | if (i == br->count) | |
852 | level = max_level; | |
90c53ca4 | 853 | } |
e047cca6 | 854 | |
e047cca6 | 855 | set_level: |
90c53ca4 | 856 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
857 | if (result) |
858 | goto out_free_levels; | |
1a7c618a | 859 | |
d32f6947 ZR |
860 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
861 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 862 | kfree(obj); |
1a7c618a | 863 | return result; |
469778c1 JJ |
864 | |
865 | out_free_levels: | |
866 | kfree(br->levels); | |
867 | out_free: | |
868 | kfree(br); | |
869 | out: | |
870 | device->brightness = NULL; | |
871 | kfree(obj); | |
1a7c618a | 872 | return result; |
469778c1 JJ |
873 | } |
874 | ||
875 | /* | |
876 | * Arg: | |
877 | * device : video output device (LCD, CRT, ..) | |
878 | * | |
879 | * Return Value: | |
1da177e4 LT |
880 | * None |
881 | * | |
98fb8fe1 | 882 | * Find out all required AML methods defined under the output |
1da177e4 LT |
883 | * device. |
884 | */ | |
885 | ||
4be44fcd | 886 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 887 | { |
1da177e4 | 888 | acpi_handle h_dummy1; |
1da177e4 | 889 | |
90130268 | 890 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { |
1da177e4 LT |
891 | device->cap._ADR = 1; |
892 | } | |
90130268 | 893 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) { |
4be44fcd | 894 | device->cap._BCL = 1; |
1da177e4 | 895 | } |
90130268 | 896 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) { |
4be44fcd | 897 | device->cap._BCM = 1; |
1da177e4 | 898 | } |
2f3d000a YL |
899 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1))) |
900 | device->cap._BQC = 1; | |
c60d638e ZR |
901 | else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ", |
902 | &h_dummy1))) { | |
903 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); | |
904 | device->cap._BCQ = 1; | |
905 | } | |
906 | ||
90130268 | 907 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { |
4be44fcd | 908 | device->cap._DDC = 1; |
1da177e4 | 909 | } |
1da177e4 | 910 | |
c04c697c MG |
911 | if (acpi_video_init_brightness(device)) |
912 | return; | |
913 | ||
8e5c2b77 | 914 | if (acpi_video_backlight_support()) { |
a19a6ee6 | 915 | struct backlight_properties props; |
9661e92c MG |
916 | struct pci_dev *pdev; |
917 | acpi_handle acpi_parent; | |
918 | struct device *parent = NULL; | |
702ed512 | 919 | int result; |
2f3d000a YL |
920 | static int count = 0; |
921 | char *name; | |
1a7c618a | 922 | |
aeb834d9 | 923 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
2f3d000a YL |
924 | if (!name) |
925 | return; | |
aeb834d9 | 926 | count++; |
2f3d000a | 927 | |
9661e92c MG |
928 | acpi_get_parent(device->dev->handle, &acpi_parent); |
929 | ||
930 | pdev = acpi_get_pci_dev(acpi_parent); | |
931 | if (pdev) { | |
932 | parent = &pdev->dev; | |
933 | pci_dev_put(pdev); | |
934 | } | |
935 | ||
a19a6ee6 | 936 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 937 | props.type = BACKLIGHT_FIRMWARE; |
a19a6ee6 | 938 | props.max_brightness = device->brightness->count - 3; |
9661e92c MG |
939 | device->backlight = backlight_device_register(name, |
940 | parent, | |
941 | device, | |
a19a6ee6 MG |
942 | &acpi_backlight_ops, |
943 | &props); | |
2f3d000a | 944 | kfree(name); |
e01ce79b ZR |
945 | if (IS_ERR(device->backlight)) |
946 | return; | |
702ed512 | 947 | |
ac7729da RW |
948 | /* |
949 | * Save current brightness level in case we have to restore it | |
950 | * before acpi_video_device_lcd_set_level() is called next time. | |
951 | */ | |
952 | device->backlight->props.brightness = | |
953 | acpi_video_get_brightness(device->backlight); | |
702ed512 | 954 | |
4a703a8f | 955 | device->cooling_dev = thermal_cooling_device_register("LCD", |
702ed512 | 956 | device->dev, &video_cooling_ops); |
4a703a8f | 957 | if (IS_ERR(device->cooling_dev)) { |
4b4fe3b6 | 958 | /* |
4a703a8f | 959 | * Set cooling_dev to NULL so we don't crash trying to |
4b4fe3b6 DT |
960 | * free it. |
961 | * Also, why the hell we are returning early and | |
962 | * not attempt to register video output if cooling | |
963 | * device registration failed? | |
964 | * -- dtor | |
965 | */ | |
4a703a8f | 966 | device->cooling_dev = NULL; |
43ff39f2 | 967 | return; |
4b4fe3b6 | 968 | } |
43ff39f2 | 969 | |
fc3a8828 | 970 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
4a703a8f | 971 | device->cooling_dev->id); |
9030062f | 972 | result = sysfs_create_link(&device->dev->dev.kobj, |
4a703a8f | 973 | &device->cooling_dev->device.kobj, |
9030062f JL |
974 | "thermal_cooling"); |
975 | if (result) | |
976 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
4a703a8f | 977 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
9030062f JL |
978 | &device->dev->dev.kobj, "device"); |
979 | if (result) | |
980 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
981 | ||
c04c697c MG |
982 | } else { |
983 | /* Remove the brightness object. */ | |
984 | kfree(device->brightness->levels); | |
985 | kfree(device->brightness); | |
986 | device->brightness = NULL; | |
2f3d000a | 987 | } |
1da177e4 LT |
988 | } |
989 | ||
990 | /* | |
991 | * Arg: | |
992 | * device : video output device (VGA) | |
993 | * | |
994 | * Return Value: | |
995 | * None | |
996 | * | |
98fb8fe1 | 997 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
998 | */ |
999 | ||
4be44fcd | 1000 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1001 | { |
4be44fcd | 1002 | acpi_handle h_dummy1; |
1da177e4 | 1003 | |
90130268 | 1004 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { |
1da177e4 LT |
1005 | video->cap._DOS = 1; |
1006 | } | |
90130268 | 1007 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { |
1da177e4 LT |
1008 | video->cap._DOD = 1; |
1009 | } | |
90130268 | 1010 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { |
1da177e4 LT |
1011 | video->cap._ROM = 1; |
1012 | } | |
90130268 | 1013 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { |
1da177e4 LT |
1014 | video->cap._GPD = 1; |
1015 | } | |
90130268 | 1016 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { |
1da177e4 LT |
1017 | video->cap._SPD = 1; |
1018 | } | |
90130268 | 1019 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) { |
1da177e4 LT |
1020 | video->cap._VPO = 1; |
1021 | } | |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | * Check whether the video bus device has required AML method to | |
1026 | * support the desired features | |
1027 | */ | |
1028 | ||
4be44fcd | 1029 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1030 | { |
4be44fcd | 1031 | acpi_status status = -ENOENT; |
1e4cffe7 | 1032 | struct pci_dev *dev; |
1da177e4 LT |
1033 | |
1034 | if (!video) | |
d550d98d | 1035 | return -EINVAL; |
1da177e4 | 1036 | |
1e4cffe7 | 1037 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1038 | if (!dev) |
1039 | return -ENODEV; | |
1e4cffe7 | 1040 | pci_dev_put(dev); |
22c13f9d | 1041 | |
1da177e4 LT |
1042 | /* Since there is no HID, CID and so on for VGA driver, we have |
1043 | * to check well known required nodes. | |
1044 | */ | |
1045 | ||
98fb8fe1 | 1046 | /* Does this device support video switching? */ |
3a1151e3 SB |
1047 | if (video->cap._DOS || video->cap._DOD) { |
1048 | if (!video->cap._DOS) { | |
1049 | printk(KERN_WARNING FW_BUG | |
1050 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1051 | acpi_device_bid(video->device)); | |
1052 | } | |
1da177e4 LT |
1053 | video->flags.multihead = 1; |
1054 | status = 0; | |
1055 | } | |
1056 | ||
98fb8fe1 | 1057 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1058 | if (video->cap._ROM) { |
1da177e4 LT |
1059 | video->flags.rom = 1; |
1060 | status = 0; | |
1061 | } | |
1062 | ||
98fb8fe1 | 1063 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1064 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1065 | video->flags.post = 1; |
1066 | status = 0; | |
1067 | } | |
1068 | ||
d550d98d | 1069 | return status; |
1da177e4 LT |
1070 | } |
1071 | ||
1da177e4 LT |
1072 | /* -------------------------------------------------------------------------- |
1073 | Driver Interface | |
1074 | -------------------------------------------------------------------------- */ | |
1075 | ||
1076 | /* device interface */ | |
82cae999 RZ |
1077 | static struct acpi_video_device_attrib* |
1078 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) | |
1079 | { | |
78eed028 DT |
1080 | struct acpi_video_enumerated_device *ids; |
1081 | int i; | |
1082 | ||
1083 | for (i = 0; i < video->attached_count; i++) { | |
1084 | ids = &video->attached_array[i]; | |
1085 | if ((ids->value.int_val & 0xffff) == device_id) | |
1086 | return &ids->value.attrib; | |
1087 | } | |
82cae999 | 1088 | |
82cae999 RZ |
1089 | return NULL; |
1090 | } | |
1da177e4 | 1091 | |
e92a7162 MG |
1092 | static int |
1093 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1094 | unsigned long device_id) | |
1095 | { | |
1096 | struct acpi_video_enumerated_device *ids; | |
1097 | int i; | |
1098 | ||
1099 | for (i = 0; i < video->attached_count; i++) { | |
1100 | ids = &video->attached_array[i]; | |
1101 | if ((ids->value.int_val & 0xffff) == device_id) | |
1102 | return ids->value.int_val; | |
1103 | } | |
1104 | ||
1105 | return 0; | |
1106 | } | |
1107 | ||
1da177e4 | 1108 | static int |
4be44fcd LB |
1109 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1110 | struct acpi_video_bus *video) | |
1da177e4 | 1111 | { |
27663c58 | 1112 | unsigned long long device_id; |
e92a7162 | 1113 | int status, device_type; |
4be44fcd | 1114 | struct acpi_video_device *data; |
82cae999 | 1115 | struct acpi_video_device_attrib* attribute; |
1da177e4 | 1116 | |
4be44fcd LB |
1117 | status = |
1118 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1119 | /* Some device omits _ADR, we skip them instead of fail */ |
1120 | if (ACPI_FAILURE(status)) | |
1121 | return 0; | |
1da177e4 | 1122 | |
91e13aa3 AL |
1123 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1124 | if (!data) | |
1125 | return -ENOMEM; | |
82cae999 | 1126 | |
91e13aa3 AL |
1127 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1128 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1129 | device->driver_data = data; | |
1130 | ||
1131 | data->device_id = device_id; | |
1132 | data->video = video; | |
1133 | data->dev = device; | |
1134 | ||
1135 | attribute = acpi_video_get_device_attr(video, device_id); | |
1136 | ||
1137 | if((attribute != NULL) && attribute->device_id_scheme) { | |
1138 | switch (attribute->display_type) { | |
1139 | case ACPI_VIDEO_DISPLAY_CRT: | |
1140 | data->flags.crt = 1; | |
1141 | break; | |
1142 | case ACPI_VIDEO_DISPLAY_TV: | |
1143 | data->flags.tvout = 1; | |
1144 | break; | |
1145 | case ACPI_VIDEO_DISPLAY_DVI: | |
1146 | data->flags.dvi = 1; | |
1147 | break; | |
1148 | case ACPI_VIDEO_DISPLAY_LCD: | |
1149 | data->flags.lcd = 1; | |
1150 | break; | |
1151 | default: | |
1152 | data->flags.unknown = 1; | |
1153 | break; | |
1154 | } | |
1155 | if(attribute->bios_can_detect) | |
1156 | data->flags.bios = 1; | |
1157 | } else { | |
1158 | /* Check for legacy IDs */ | |
1159 | device_type = acpi_video_get_device_type(video, device_id); | |
1160 | /* Ignore bits 16 and 18-20 */ | |
1161 | switch (device_type & 0xffe2ffff) { | |
e92a7162 MG |
1162 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1163 | data->flags.crt = 1; | |
1164 | break; | |
1165 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1166 | data->flags.lcd = 1; | |
1167 | break; | |
1168 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1169 | data->flags.tvout = 1; | |
1170 | break; | |
1171 | default: | |
1172 | data->flags.unknown = 1; | |
e92a7162 | 1173 | } |
91e13aa3 | 1174 | } |
4be44fcd | 1175 | |
91e13aa3 AL |
1176 | acpi_video_device_bind(video, data); |
1177 | acpi_video_device_find_cap(data); | |
1da177e4 | 1178 | |
91e13aa3 AL |
1179 | status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
1180 | acpi_video_device_notify, data); | |
1181 | if (ACPI_FAILURE(status)) | |
1182 | dev_err(&device->dev, "Error installing notify handler\n"); | |
1183 | else | |
1184 | data->flags.notify = 1; | |
1da177e4 | 1185 | |
91e13aa3 AL |
1186 | mutex_lock(&video->device_list_lock); |
1187 | list_add_tail(&data->entry, &video->video_device_list); | |
1188 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1189 | |
91e13aa3 | 1190 | return status; |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | /* | |
1194 | * Arg: | |
1195 | * video : video bus device | |
1196 | * | |
1197 | * Return: | |
1198 | * none | |
1199 | * | |
1200 | * Enumerate the video device list of the video bus, | |
1201 | * bind the ids with the corresponding video devices | |
1202 | * under the video bus. | |
4be44fcd | 1203 | */ |
1da177e4 | 1204 | |
4be44fcd | 1205 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1206 | { |
ff102ea9 DT |
1207 | struct acpi_video_device *dev; |
1208 | ||
bbac81f5 | 1209 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1210 | |
1211 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1212 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1213 | |
bbac81f5 | 1214 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1215 | } |
1216 | ||
1217 | /* | |
1218 | * Arg: | |
1219 | * video : video bus device | |
1220 | * device : video output device under the video | |
1221 | * bus | |
1222 | * | |
1223 | * Return: | |
1224 | * none | |
1225 | * | |
1226 | * Bind the ids with the corresponding video devices | |
1227 | * under the video bus. | |
4be44fcd | 1228 | */ |
1da177e4 LT |
1229 | |
1230 | static void | |
4be44fcd LB |
1231 | acpi_video_device_bind(struct acpi_video_bus *video, |
1232 | struct acpi_video_device *device) | |
1da177e4 | 1233 | { |
78eed028 | 1234 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1235 | int i; |
1da177e4 | 1236 | |
78eed028 DT |
1237 | for (i = 0; i < video->attached_count; i++) { |
1238 | ids = &video->attached_array[i]; | |
1239 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1240 | ids->bind_info = device; | |
1da177e4 LT |
1241 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1242 | } | |
1243 | } | |
1da177e4 LT |
1244 | } |
1245 | ||
1246 | /* | |
1247 | * Arg: | |
1248 | * video : video bus device | |
1249 | * | |
1250 | * Return: | |
1251 | * < 0 : error | |
1252 | * | |
1253 | * Call _DOD to enumerate all devices attached to display adapter | |
1254 | * | |
4be44fcd | 1255 | */ |
1da177e4 LT |
1256 | |
1257 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1258 | { | |
4be44fcd LB |
1259 | int status; |
1260 | int count; | |
1261 | int i; | |
78eed028 | 1262 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1263 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1264 | union acpi_object *dod = NULL; | |
1265 | union acpi_object *obj; | |
1da177e4 | 1266 | |
90130268 | 1267 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1268 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1269 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1270 | return status; |
1da177e4 LT |
1271 | } |
1272 | ||
50dd0969 | 1273 | dod = buffer.pointer; |
1da177e4 | 1274 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1275 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1276 | status = -EFAULT; |
1277 | goto out; | |
1278 | } | |
1279 | ||
1280 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1281 | dod->package.count)); |
1da177e4 | 1282 | |
78eed028 DT |
1283 | active_list = kcalloc(1 + dod->package.count, |
1284 | sizeof(struct acpi_video_enumerated_device), | |
1285 | GFP_KERNEL); | |
1286 | if (!active_list) { | |
1da177e4 LT |
1287 | status = -ENOMEM; |
1288 | goto out; | |
1289 | } | |
1290 | ||
1291 | count = 0; | |
1292 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1293 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1294 | |
1295 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1296 | printk(KERN_ERR PREFIX |
1297 | "Invalid _DOD data in element %d\n", i); | |
1298 | continue; | |
1da177e4 | 1299 | } |
78eed028 DT |
1300 | |
1301 | active_list[count].value.int_val = obj->integer.value; | |
1302 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1303 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1304 | (int)obj->integer.value)); | |
1da177e4 LT |
1305 | count++; |
1306 | } | |
1da177e4 | 1307 | |
6044ec88 | 1308 | kfree(video->attached_array); |
4be44fcd | 1309 | |
78eed028 | 1310 | video->attached_array = active_list; |
1da177e4 | 1311 | video->attached_count = count; |
78eed028 DT |
1312 | |
1313 | out: | |
02438d87 | 1314 | kfree(buffer.pointer); |
d550d98d | 1315 | return status; |
1da177e4 LT |
1316 | } |
1317 | ||
4be44fcd LB |
1318 | static int |
1319 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1320 | u32 level_current, u32 event) | |
1da177e4 | 1321 | { |
63f0edfc | 1322 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1323 | max = max_below = 0; |
1324 | min = min_above = 255; | |
63f0edfc | 1325 | /* Find closest level to level_current */ |
0a3db1ce | 1326 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1327 | l = device->brightness->levels[i]; |
1328 | if (abs(l - level_current) < abs(delta)) { | |
1329 | delta = l - level_current; | |
1330 | if (!delta) | |
1331 | break; | |
1332 | } | |
1333 | } | |
1334 | /* Ajust level_current to closest available level */ | |
1335 | level_current += delta; | |
0a3db1ce | 1336 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1337 | l = device->brightness->levels[i]; |
1338 | if (l < min) | |
1339 | min = l; | |
1340 | if (l > max) | |
1341 | max = l; | |
1342 | if (l < min_above && l > level_current) | |
1343 | min_above = l; | |
1344 | if (l > max_below && l < level_current) | |
1345 | max_below = l; | |
1346 | } | |
1347 | ||
1348 | switch (event) { | |
1349 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1350 | return (level_current < max) ? min_above : min; | |
1351 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1352 | return (level_current < max) ? min_above : max; | |
1353 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1354 | return (level_current > min) ? max_below : min; | |
1355 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1356 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1357 | return 0; | |
1358 | default: | |
1359 | return level_current; | |
1360 | } | |
1da177e4 LT |
1361 | } |
1362 | ||
c8890f90 | 1363 | static int |
4be44fcd | 1364 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1365 | { |
27663c58 | 1366 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1367 | int result = -EINVAL; |
1368 | ||
8e5c2b77 RW |
1369 | /* no warning message if acpi_backlight=vendor is used */ |
1370 | if (!acpi_video_backlight_support()) | |
28c32e99 ZR |
1371 | return 0; |
1372 | ||
469778c1 | 1373 | if (!device->brightness) |
c8890f90 ZR |
1374 | goto out; |
1375 | ||
1376 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1377 | &level_current, |
1378 | false); | |
c8890f90 ZR |
1379 | if (result) |
1380 | goto out; | |
1381 | ||
1da177e4 | 1382 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1383 | |
24450c7a | 1384 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1385 | |
36342742 MG |
1386 | if (!result) |
1387 | backlight_force_update(device->backlight, | |
1388 | BACKLIGHT_UPDATE_HOTKEY); | |
1389 | ||
c8890f90 ZR |
1390 | out: |
1391 | if (result) | |
1392 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1393 | ||
1394 | return result; | |
1da177e4 LT |
1395 | } |
1396 | ||
e92a7162 MG |
1397 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1398 | void **edid) | |
1399 | { | |
1400 | struct acpi_video_bus *video; | |
1401 | struct acpi_video_device *video_device; | |
1402 | union acpi_object *buffer = NULL; | |
1403 | acpi_status status; | |
1404 | int i, length; | |
1405 | ||
1406 | if (!device || !acpi_driver_data(device)) | |
1407 | return -EINVAL; | |
1408 | ||
1409 | video = acpi_driver_data(device); | |
1410 | ||
1411 | for (i = 0; i < video->attached_count; i++) { | |
1412 | video_device = video->attached_array[i].bind_info; | |
1413 | length = 256; | |
1414 | ||
1415 | if (!video_device) | |
1416 | continue; | |
1417 | ||
82069552 ZR |
1418 | if (!video_device->cap._DDC) |
1419 | continue; | |
1420 | ||
e92a7162 MG |
1421 | if (type) { |
1422 | switch (type) { | |
1423 | case ACPI_VIDEO_DISPLAY_CRT: | |
1424 | if (!video_device->flags.crt) | |
1425 | continue; | |
1426 | break; | |
1427 | case ACPI_VIDEO_DISPLAY_TV: | |
1428 | if (!video_device->flags.tvout) | |
1429 | continue; | |
1430 | break; | |
1431 | case ACPI_VIDEO_DISPLAY_DVI: | |
1432 | if (!video_device->flags.dvi) | |
1433 | continue; | |
1434 | break; | |
1435 | case ACPI_VIDEO_DISPLAY_LCD: | |
1436 | if (!video_device->flags.lcd) | |
1437 | continue; | |
1438 | break; | |
1439 | } | |
1440 | } else if (video_device->device_id != device_id) { | |
1441 | continue; | |
1442 | } | |
1443 | ||
1444 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1445 | ||
1446 | if (ACPI_FAILURE(status) || !buffer || | |
1447 | buffer->type != ACPI_TYPE_BUFFER) { | |
1448 | length = 128; | |
1449 | status = acpi_video_device_EDID(video_device, &buffer, | |
1450 | length); | |
1451 | if (ACPI_FAILURE(status) || !buffer || | |
1452 | buffer->type != ACPI_TYPE_BUFFER) { | |
1453 | continue; | |
1454 | } | |
1455 | } | |
1456 | ||
1457 | *edid = buffer->buffer.pointer; | |
1458 | return length; | |
1459 | } | |
1460 | ||
1461 | return -ENODEV; | |
1462 | } | |
1463 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1464 | ||
1da177e4 | 1465 | static int |
4be44fcd LB |
1466 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1467 | struct acpi_device *device) | |
1da177e4 | 1468 | { |
fba4e087 | 1469 | int status = 0; |
ff102ea9 | 1470 | struct acpi_device *dev; |
1da177e4 | 1471 | |
fba4e087 IM |
1472 | /* |
1473 | * There are systems where video module known to work fine regardless | |
1474 | * of broken _DOD and ignoring returned value here doesn't cause | |
1475 | * any issues later. | |
1476 | */ | |
1477 | acpi_video_device_enumerate(video); | |
1da177e4 | 1478 | |
ff102ea9 | 1479 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1480 | |
1481 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1482 | if (status) { |
91e13aa3 AL |
1483 | dev_err(&dev->dev, "Can't attach device\n"); |
1484 | break; | |
1da177e4 | 1485 | } |
1da177e4 | 1486 | } |
d550d98d | 1487 | return status; |
1da177e4 LT |
1488 | } |
1489 | ||
4be44fcd | 1490 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
1da177e4 | 1491 | { |
031ec77b | 1492 | acpi_status status; |
1da177e4 LT |
1493 | |
1494 | if (!device || !device->video) | |
d550d98d | 1495 | return -ENOENT; |
1da177e4 | 1496 | |
91e13aa3 AL |
1497 | if (device->flags.notify) { |
1498 | status = acpi_remove_notify_handler(device->dev->handle, | |
1499 | ACPI_DEVICE_NOTIFY, acpi_video_device_notify); | |
1500 | if (ACPI_FAILURE(status)) | |
1501 | dev_err(&device->dev->dev, | |
1502 | "Can't remove video notify handler\n"); | |
cfa806f0 | 1503 | } |
91e13aa3 | 1504 | |
e29b3ee3 | 1505 | if (device->backlight) { |
e29b3ee3 KP |
1506 | backlight_device_unregister(device->backlight); |
1507 | device->backlight = NULL; | |
1508 | } | |
4a703a8f | 1509 | if (device->cooling_dev) { |
702ed512 ZR |
1510 | sysfs_remove_link(&device->dev->dev.kobj, |
1511 | "thermal_cooling"); | |
4a703a8f | 1512 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
702ed512 | 1513 | "device"); |
4a703a8f DT |
1514 | thermal_cooling_device_unregister(device->cooling_dev); |
1515 | device->cooling_dev = NULL; | |
702ed512 | 1516 | } |
ff102ea9 | 1517 | |
d550d98d | 1518 | return 0; |
1da177e4 LT |
1519 | } |
1520 | ||
4be44fcd | 1521 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1da177e4 | 1522 | { |
4be44fcd | 1523 | int status; |
ff102ea9 | 1524 | struct acpi_video_device *dev, *next; |
1da177e4 | 1525 | |
bbac81f5 | 1526 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1527 | |
ff102ea9 | 1528 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
1da177e4 | 1529 | |
ff102ea9 | 1530 | status = acpi_video_bus_put_one_device(dev); |
4be44fcd LB |
1531 | if (ACPI_FAILURE(status)) |
1532 | printk(KERN_WARNING PREFIX | |
1533 | "hhuuhhuu bug in acpi video driver.\n"); | |
1da177e4 | 1534 | |
ff102ea9 DT |
1535 | if (dev->brightness) { |
1536 | kfree(dev->brightness->levels); | |
1537 | kfree(dev->brightness); | |
1538 | } | |
1539 | list_del(&dev->entry); | |
1540 | kfree(dev); | |
1da177e4 LT |
1541 | } |
1542 | ||
bbac81f5 | 1543 | mutex_unlock(&video->device_list_lock); |
ff102ea9 | 1544 | |
d550d98d | 1545 | return 0; |
1da177e4 LT |
1546 | } |
1547 | ||
1548 | /* acpi_video interface */ | |
1549 | ||
efaa14c7 AL |
1550 | /* |
1551 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1552 | * preform any automatic brightness change on receiving a notification. | |
1553 | */ | |
4be44fcd | 1554 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1555 | { |
efaa14c7 AL |
1556 | return acpi_video_bus_DOS(video, 0, |
1557 | acpi_video_backlight_quirks() ? 1 : 0); | |
1da177e4 LT |
1558 | } |
1559 | ||
4be44fcd | 1560 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1561 | { |
efaa14c7 AL |
1562 | return acpi_video_bus_DOS(video, 0, |
1563 | acpi_video_backlight_quirks() ? 0 : 1); | |
1da177e4 LT |
1564 | } |
1565 | ||
7015558f | 1566 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1567 | { |
7015558f | 1568 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1569 | struct input_dev *input; |
17c452f9 | 1570 | int keycode = 0; |
e9dab196 | 1571 | |
1da177e4 | 1572 | if (!video) |
d550d98d | 1573 | return; |
1da177e4 | 1574 | |
e9dab196 | 1575 | input = video->input; |
1da177e4 LT |
1576 | |
1577 | switch (event) { | |
98fb8fe1 | 1578 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1579 | * most likely via hotkey. */ |
14e04fb3 | 1580 | acpi_bus_generate_proc_event(device, event, 0); |
8a37c65d | 1581 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1582 | break; |
1583 | ||
98fb8fe1 | 1584 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1585 | * connector. */ |
1586 | acpi_video_device_enumerate(video); | |
1587 | acpi_video_device_rebind(video); | |
14e04fb3 | 1588 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1589 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1590 | break; |
1591 | ||
4be44fcd | 1592 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
25c87f7f | 1593 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1594 | keycode = KEY_SWITCHVIDEOMODE; |
1595 | break; | |
4be44fcd | 1596 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
25c87f7f | 1597 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1598 | keycode = KEY_VIDEO_NEXT; |
1599 | break; | |
4be44fcd | 1600 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
14e04fb3 | 1601 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1602 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1603 | break; |
1604 | ||
1605 | default: | |
1606 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1607 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1608 | break; |
1609 | } | |
1610 | ||
8a37c65d LT |
1611 | if (acpi_notifier_call_chain(device, event, 0)) |
1612 | /* Something vetoed the keypress. */ | |
1613 | keycode = 0; | |
17c452f9 MG |
1614 | |
1615 | if (keycode) { | |
1616 | input_report_key(input, keycode, 1); | |
1617 | input_sync(input); | |
1618 | input_report_key(input, keycode, 0); | |
1619 | input_sync(input); | |
1620 | } | |
e9dab196 | 1621 | |
d550d98d | 1622 | return; |
1da177e4 LT |
1623 | } |
1624 | ||
4be44fcd | 1625 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1626 | { |
50dd0969 | 1627 | struct acpi_video_device *video_device = data; |
4be44fcd | 1628 | struct acpi_device *device = NULL; |
e9dab196 LY |
1629 | struct acpi_video_bus *bus; |
1630 | struct input_dev *input; | |
17c452f9 | 1631 | int keycode = 0; |
1da177e4 | 1632 | |
1da177e4 | 1633 | if (!video_device) |
d550d98d | 1634 | return; |
1da177e4 | 1635 | |
e6afa0de | 1636 | device = video_device->dev; |
e9dab196 LY |
1637 | bus = video_device->video; |
1638 | input = bus->input; | |
1da177e4 LT |
1639 | |
1640 | switch (event) { | |
4be44fcd | 1641 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1642 | if (brightness_switch_enabled) |
1643 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1644 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1645 | keycode = KEY_BRIGHTNESS_CYCLE; |
1646 | break; | |
4be44fcd | 1647 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1648 | if (brightness_switch_enabled) |
1649 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1650 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1651 | keycode = KEY_BRIGHTNESSUP; |
1652 | break; | |
4be44fcd | 1653 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1654 | if (brightness_switch_enabled) |
1655 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1656 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1657 | keycode = KEY_BRIGHTNESSDOWN; |
1658 | break; | |
70f23fd6 | 1659 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1660 | if (brightness_switch_enabled) |
1661 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1662 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1663 | keycode = KEY_BRIGHTNESS_ZERO; |
1664 | break; | |
4be44fcd | 1665 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1666 | if (brightness_switch_enabled) |
1667 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1668 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1669 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1670 | break; |
1671 | default: | |
1672 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1673 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1674 | break; |
1675 | } | |
e9dab196 | 1676 | |
7761f638 | 1677 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1678 | |
1679 | if (keycode) { | |
1680 | input_report_key(input, keycode, 1); | |
1681 | input_sync(input); | |
1682 | input_report_key(input, keycode, 0); | |
1683 | input_sync(input); | |
1684 | } | |
e9dab196 | 1685 | |
d550d98d | 1686 | return; |
1da177e4 LT |
1687 | } |
1688 | ||
ac7729da RW |
1689 | static int acpi_video_resume(struct notifier_block *nb, |
1690 | unsigned long val, void *ign) | |
863c1490 MG |
1691 | { |
1692 | struct acpi_video_bus *video; | |
1693 | struct acpi_video_device *video_device; | |
1694 | int i; | |
1695 | ||
ac7729da RW |
1696 | switch (val) { |
1697 | case PM_HIBERNATION_PREPARE: | |
1698 | case PM_SUSPEND_PREPARE: | |
1699 | case PM_RESTORE_PREPARE: | |
1700 | return NOTIFY_DONE; | |
1701 | } | |
863c1490 | 1702 | |
ac7729da RW |
1703 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1704 | ||
1705 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1706 | |
1707 | for (i = 0; i < video->attached_count; i++) { | |
1708 | video_device = video->attached_array[i].bind_info; | |
1709 | if (video_device && video_device->backlight) | |
1710 | acpi_video_set_brightness(video_device->backlight); | |
1711 | } | |
ac7729da RW |
1712 | |
1713 | return NOTIFY_OK; | |
863c1490 MG |
1714 | } |
1715 | ||
c504f8cb ZR |
1716 | static acpi_status |
1717 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1718 | void **return_value) | |
1719 | { | |
1720 | struct acpi_device *device = context; | |
1721 | struct acpi_device *sibling; | |
1722 | int result; | |
1723 | ||
1724 | if (handle == device->handle) | |
1725 | return AE_CTRL_TERMINATE; | |
1726 | ||
1727 | result = acpi_bus_get_device(handle, &sibling); | |
1728 | if (result) | |
1729 | return AE_OK; | |
1730 | ||
1731 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1732 | return AE_ALREADY_EXISTS; | |
1733 | ||
1734 | return AE_OK; | |
1735 | } | |
1736 | ||
ac7729da RW |
1737 | static int instance; |
1738 | ||
4be44fcd | 1739 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1740 | { |
f51e8391 | 1741 | struct acpi_video_bus *video; |
e9dab196 | 1742 | struct input_dev *input; |
f51e8391 | 1743 | int error; |
c504f8cb ZR |
1744 | acpi_status status; |
1745 | ||
1746 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1747 | device->parent->handle, 1, | |
1748 | acpi_video_bus_match, NULL, | |
1749 | device, NULL); | |
1750 | if (status == AE_ALREADY_EXISTS) { | |
1751 | printk(KERN_WARNING FW_BUG | |
1752 | "Duplicate ACPI video bus devices for the" | |
1753 | " same VGA controller, please try module " | |
1754 | "parameter \"video.allow_duplicates=1\"" | |
1755 | "if the current driver doesn't work.\n"); | |
1756 | if (!allow_duplicates) | |
1757 | return -ENODEV; | |
1758 | } | |
1da177e4 | 1759 | |
36bcbec7 | 1760 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1761 | if (!video) |
d550d98d | 1762 | return -ENOMEM; |
1da177e4 | 1763 | |
e6d9da1d ZR |
1764 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1765 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1766 | if (instance) | |
1767 | device->pnp.bus_id[3] = '0' + instance; | |
1768 | instance ++; | |
1769 | } | |
f3b39f13 ZY |
1770 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1771 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1772 | if (instance) | |
1773 | device->pnp.bus_id[3] = '0' + instance; | |
1774 | instance++; | |
1775 | } | |
e6d9da1d | 1776 | |
e6afa0de | 1777 | video->device = device; |
1da177e4 LT |
1778 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1779 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1780 | device->driver_data = video; |
1da177e4 LT |
1781 | |
1782 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1783 | error = acpi_video_bus_check(video); |
1784 | if (error) | |
1785 | goto err_free_video; | |
1da177e4 | 1786 | |
bbac81f5 | 1787 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1788 | INIT_LIST_HEAD(&video->video_device_list); |
1789 | ||
ea9f8856 IM |
1790 | error = acpi_video_bus_get_devices(video, device); |
1791 | if (error) | |
91e13aa3 | 1792 | goto err_put_video; |
1da177e4 | 1793 | |
e9dab196 | 1794 | video->input = input = input_allocate_device(); |
f51e8391 DT |
1795 | if (!input) { |
1796 | error = -ENOMEM; | |
b60e7f61 | 1797 | goto err_put_video; |
f51e8391 | 1798 | } |
e9dab196 | 1799 | |
b60e7f61 IM |
1800 | error = acpi_video_bus_start_devices(video); |
1801 | if (error) | |
1802 | goto err_free_input_dev; | |
1803 | ||
e9dab196 LY |
1804 | snprintf(video->phys, sizeof(video->phys), |
1805 | "%s/video/input0", acpi_device_hid(video->device)); | |
1806 | ||
1807 | input->name = acpi_device_name(video->device); | |
1808 | input->phys = video->phys; | |
1809 | input->id.bustype = BUS_HOST; | |
1810 | input->id.product = 0x06; | |
91c05c66 | 1811 | input->dev.parent = &device->dev; |
e9dab196 LY |
1812 | input->evbit[0] = BIT(EV_KEY); |
1813 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1814 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1815 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1816 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1817 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1818 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1819 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1820 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
e9dab196 | 1821 | |
1da177e4 | 1822 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1823 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1824 | video->flags.multihead ? "yes" : "no", | |
1825 | video->flags.rom ? "yes" : "no", | |
1826 | video->flags.post ? "yes" : "no"); | |
1da177e4 | 1827 | |
ac7729da RW |
1828 | video->pm_nb.notifier_call = acpi_video_resume; |
1829 | video->pm_nb.priority = 0; | |
ea9f8856 IM |
1830 | error = register_pm_notifier(&video->pm_nb); |
1831 | if (error) | |
301f33fb DC |
1832 | goto err_stop_video; |
1833 | ||
1834 | error = input_register_device(input); | |
1835 | if (error) | |
1836 | goto err_unregister_pm_notifier; | |
ac7729da | 1837 | |
f51e8391 DT |
1838 | return 0; |
1839 | ||
301f33fb DC |
1840 | err_unregister_pm_notifier: |
1841 | unregister_pm_notifier(&video->pm_nb); | |
f51e8391 DT |
1842 | err_stop_video: |
1843 | acpi_video_bus_stop_devices(video); | |
b60e7f61 IM |
1844 | err_free_input_dev: |
1845 | input_free_device(input); | |
ea9f8856 | 1846 | err_put_video: |
f51e8391 DT |
1847 | acpi_video_bus_put_devices(video); |
1848 | kfree(video->attached_array); | |
f51e8391 DT |
1849 | err_free_video: |
1850 | kfree(video); | |
db89b4f0 | 1851 | device->driver_data = NULL; |
1da177e4 | 1852 | |
f51e8391 | 1853 | return error; |
1da177e4 LT |
1854 | } |
1855 | ||
51fac838 | 1856 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1857 | { |
4be44fcd | 1858 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1859 | |
1da177e4 LT |
1860 | |
1861 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1862 | return -EINVAL; |
1da177e4 | 1863 | |
50dd0969 | 1864 | video = acpi_driver_data(device); |
1da177e4 | 1865 | |
ac7729da RW |
1866 | unregister_pm_notifier(&video->pm_nb); |
1867 | ||
1da177e4 | 1868 | acpi_video_bus_stop_devices(video); |
1da177e4 | 1869 | acpi_video_bus_put_devices(video); |
1da177e4 | 1870 | |
e9dab196 | 1871 | input_unregister_device(video->input); |
6044ec88 | 1872 | kfree(video->attached_array); |
1da177e4 LT |
1873 | kfree(video); |
1874 | ||
d550d98d | 1875 | return 0; |
1da177e4 LT |
1876 | } |
1877 | ||
c6996bdd AC |
1878 | static int __init is_i740(struct pci_dev *dev) |
1879 | { | |
1880 | if (dev->device == 0x00D1) | |
1881 | return 1; | |
1882 | if (dev->device == 0x7000) | |
1883 | return 1; | |
1884 | return 0; | |
1885 | } | |
1886 | ||
74a365b3 MG |
1887 | static int __init intel_opregion_present(void) |
1888 | { | |
c6996bdd | 1889 | int opregion = 0; |
74a365b3 MG |
1890 | struct pci_dev *dev = NULL; |
1891 | u32 address; | |
1892 | ||
1893 | for_each_pci_dev(dev) { | |
1894 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1895 | continue; | |
1896 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1897 | continue; | |
c6996bdd AC |
1898 | /* We don't want to poke around undefined i740 registers */ |
1899 | if (is_i740(dev)) | |
1900 | continue; | |
74a365b3 MG |
1901 | pci_read_config_dword(dev, 0xfc, &address); |
1902 | if (!address) | |
1903 | continue; | |
c6996bdd | 1904 | opregion = 1; |
74a365b3 | 1905 | } |
c6996bdd | 1906 | return opregion; |
74a365b3 MG |
1907 | } |
1908 | ||
8e5c2b77 | 1909 | int acpi_video_register(void) |
1da177e4 | 1910 | { |
8e5c2b77 | 1911 | int result = 0; |
86e437f0 ZY |
1912 | if (register_count) { |
1913 | /* | |
8e5c2b77 RW |
1914 | * if the function of acpi_video_register is already called, |
1915 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
1916 | */ |
1917 | return 0; | |
1918 | } | |
1da177e4 | 1919 | |
1da177e4 | 1920 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1921 | if (result < 0) |
d550d98d | 1922 | return -ENODEV; |
1da177e4 | 1923 | |
86e437f0 ZY |
1924 | /* |
1925 | * When the acpi_video_bus is loaded successfully, increase | |
1926 | * the counter reference. | |
1927 | */ | |
1928 | register_count = 1; | |
1929 | ||
d550d98d | 1930 | return 0; |
1da177e4 | 1931 | } |
8e5c2b77 | 1932 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 1933 | |
86e437f0 ZY |
1934 | void acpi_video_unregister(void) |
1935 | { | |
1936 | if (!register_count) { | |
1937 | /* | |
1938 | * If the acpi video bus is already unloaded, don't | |
1939 | * unload it again and return directly. | |
1940 | */ | |
1941 | return; | |
1942 | } | |
1943 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1944 | ||
86e437f0 ZY |
1945 | register_count = 0; |
1946 | ||
1947 | return; | |
1948 | } | |
1949 | EXPORT_SYMBOL(acpi_video_unregister); | |
1950 | ||
74a365b3 MG |
1951 | /* |
1952 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1953 | * the video opregion code to be run first in order to initialise | |
1954 | * state before any ACPI video calls are made. To handle this we defer | |
1955 | * registration of the video class until the opregion code has run. | |
1956 | */ | |
1957 | ||
1958 | static int __init acpi_video_init(void) | |
1959 | { | |
45cb50e6 ZR |
1960 | dmi_check_system(video_dmi_table); |
1961 | ||
74a365b3 MG |
1962 | if (intel_opregion_present()) |
1963 | return 0; | |
1964 | ||
1965 | return acpi_video_register(); | |
1966 | } | |
1da177e4 | 1967 | |
86e437f0 | 1968 | static void __exit acpi_video_exit(void) |
1da177e4 | 1969 | { |
86e437f0 | 1970 | acpi_video_unregister(); |
1da177e4 | 1971 | |
d550d98d | 1972 | return; |
1da177e4 LT |
1973 | } |
1974 | ||
1975 | module_init(acpi_video_init); | |
1976 | module_exit(acpi_video_exit); |