Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/list.h> | |
bbac81f5 | 32 | #include <linux/mutex.h> |
e9dab196 | 33 | #include <linux/input.h> |
2f3d000a | 34 | #include <linux/backlight.h> |
702ed512 | 35 | #include <linux/thermal.h> |
935e5f29 | 36 | #include <linux/sort.h> |
74a365b3 MG |
37 | #include <linux/pci.h> |
38 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
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 | ||
fbc9fe1b AL |
91 | /* |
92 | * For Windows 8 systems: if set ture and the GPU driver has | |
93 | * registered a backlight interface, skip registering ACPI video's. | |
94 | */ | |
95 | static bool use_native_backlight = false; | |
96 | module_param(use_native_backlight, bool, 0644); | |
97 | ||
915ea7e4 | 98 | static int register_count; |
67b662e1 AL |
99 | static struct mutex video_list_lock; |
100 | static struct list_head video_bus_head; | |
4be44fcd | 101 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 102 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 103 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 104 | |
1ba90e3a TR |
105 | static const struct acpi_device_id video_device_ids[] = { |
106 | {ACPI_VIDEO_HID, 0}, | |
107 | {"", 0}, | |
108 | }; | |
109 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
110 | ||
1da177e4 | 111 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 112 | .name = "video", |
1da177e4 | 113 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 114 | .ids = video_device_ids, |
1da177e4 LT |
115 | .ops = { |
116 | .add = acpi_video_bus_add, | |
117 | .remove = acpi_video_bus_remove, | |
7015558f | 118 | .notify = acpi_video_bus_notify, |
4be44fcd | 119 | }, |
1da177e4 LT |
120 | }; |
121 | ||
122 | struct acpi_video_bus_flags { | |
4be44fcd LB |
123 | u8 multihead:1; /* can switch video heads */ |
124 | u8 rom:1; /* can retrieve a video rom */ | |
125 | u8 post:1; /* can configure the head to */ | |
126 | u8 reserved:5; | |
1da177e4 LT |
127 | }; |
128 | ||
129 | struct acpi_video_bus_cap { | |
21fcb34e FC |
130 | u8 _DOS:1; /* Enable/Disable output switching */ |
131 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
132 | u8 _ROM:1; /* Get ROM Data */ | |
133 | u8 _GPD:1; /* Get POST Device */ | |
134 | u8 _SPD:1; /* Set POST Device */ | |
135 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 136 | u8 reserved:2; |
1da177e4 LT |
137 | }; |
138 | ||
4be44fcd LB |
139 | struct acpi_video_device_attrib { |
140 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
141 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
142 | u32 display_type:4; /* Describe the specific type in use */ | |
143 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
144 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
145 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 146 | the VGA device. */ |
21fcb34e FC |
147 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
148 | u32 reserved:10; /* Must be 0 */ | |
149 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
150 | }; |
151 | ||
152 | struct acpi_video_enumerated_device { | |
153 | union { | |
154 | u32 int_val; | |
4be44fcd | 155 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
156 | } value; |
157 | struct acpi_video_device *bind_info; | |
158 | }; | |
159 | ||
160 | struct acpi_video_bus { | |
e6afa0de | 161 | struct acpi_device *device; |
4be44fcd | 162 | u8 dos_setting; |
1da177e4 | 163 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
164 | u8 attached_count; |
165 | struct acpi_video_bus_cap cap; | |
1da177e4 | 166 | struct acpi_video_bus_flags flags; |
4be44fcd | 167 | struct list_head video_device_list; |
bbac81f5 | 168 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 169 | struct list_head entry; |
e9dab196 LY |
170 | struct input_dev *input; |
171 | char phys[32]; /* for input device */ | |
ac7729da | 172 | struct notifier_block pm_nb; |
1da177e4 LT |
173 | }; |
174 | ||
175 | struct acpi_video_device_flags { | |
4be44fcd LB |
176 | u8 crt:1; |
177 | u8 lcd:1; | |
178 | u8 tvout:1; | |
82cae999 | 179 | u8 dvi:1; |
4be44fcd LB |
180 | u8 bios:1; |
181 | u8 unknown:1; | |
91e13aa3 AL |
182 | u8 notify:1; |
183 | u8 reserved:1; | |
1da177e4 LT |
184 | }; |
185 | ||
186 | struct acpi_video_device_cap { | |
21fcb34e FC |
187 | u8 _ADR:1; /* Return the unique ID */ |
188 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
189 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 190 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 191 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 192 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
193 | }; |
194 | ||
d32f6947 ZR |
195 | struct acpi_video_brightness_flags { |
196 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 197 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 198 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
199 | }; |
200 | ||
1da177e4 | 201 | struct acpi_video_device_brightness { |
4be44fcd LB |
202 | int curr; |
203 | int count; | |
204 | int *levels; | |
d32f6947 | 205 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
206 | }; |
207 | ||
208 | struct acpi_video_device { | |
4be44fcd LB |
209 | unsigned long device_id; |
210 | struct acpi_video_device_flags flags; | |
211 | struct acpi_video_device_cap cap; | |
212 | struct list_head entry; | |
213 | struct acpi_video_bus *video; | |
214 | struct acpi_device *dev; | |
1da177e4 | 215 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 216 | struct backlight_device *backlight; |
4a703a8f | 217 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
218 | }; |
219 | ||
b7171ae7 | 220 | static const char device_decode[][30] = { |
1da177e4 LT |
221 | "motherboard VGA device", |
222 | "PCI VGA device", | |
223 | "AGP VGA device", | |
224 | "UNKNOWN", | |
225 | }; | |
226 | ||
4be44fcd LB |
227 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
228 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
229 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
230 | struct acpi_video_device *device); | |
1da177e4 | 231 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
232 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
233 | int level); | |
234 | static int acpi_video_device_lcd_get_level_current( | |
235 | struct acpi_video_device *device, | |
a89803df | 236 | unsigned long long *level, bool raw); |
4be44fcd LB |
237 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
238 | u32 level_current, u32 event); | |
c8890f90 | 239 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 240 | int event); |
1da177e4 | 241 | |
fbc9fe1b AL |
242 | static bool acpi_video_verify_backlight_support(void) |
243 | { | |
244 | if (acpi_osi_is_win8() && use_native_backlight && | |
245 | backlight_device_registered(BACKLIGHT_RAW)) | |
246 | return false; | |
247 | return acpi_video_backlight_support(); | |
248 | } | |
249 | ||
21fcb34e | 250 | /* backlight device sysfs support */ |
2f3d000a YL |
251 | static int acpi_video_get_brightness(struct backlight_device *bd) |
252 | { | |
27663c58 | 253 | unsigned long long cur_level; |
38531e6f | 254 | int i; |
7c364e79 | 255 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 256 | |
a89803df | 257 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 258 | return -EINVAL; |
38531e6f MG |
259 | for (i = 2; i < vd->brightness->count; i++) { |
260 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
261 | /* |
262 | * The first two entries are special - see page 575 | |
263 | * of the ACPI spec 3.0 | |
264 | */ | |
915ea7e4 | 265 | return i - 2; |
38531e6f MG |
266 | } |
267 | return 0; | |
2f3d000a YL |
268 | } |
269 | ||
270 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
271 | { | |
24450c7a | 272 | int request_level = bd->props.brightness + 2; |
7c364e79 | 273 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a ZR |
274 | |
275 | return acpi_video_device_lcd_set_level(vd, | |
276 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
277 | } |
278 | ||
acc2472e | 279 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
280 | .get_brightness = acpi_video_get_brightness, |
281 | .update_status = acpi_video_set_brightness, | |
282 | }; | |
283 | ||
702ed512 | 284 | /* thermal cooling device callbacks */ |
4a703a8f | 285 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 286 | long *state) |
702ed512 | 287 | { |
4a703a8f | 288 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
289 | struct acpi_video_device *video = acpi_driver_data(device); |
290 | ||
6503e5df MG |
291 | *state = video->brightness->count - 3; |
292 | return 0; | |
702ed512 ZR |
293 | } |
294 | ||
4a703a8f | 295 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 296 | long *state) |
702ed512 | 297 | { |
4a703a8f | 298 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 299 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 300 | unsigned long long level; |
6503e5df | 301 | int offset; |
702ed512 | 302 | |
a89803df | 303 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 304 | return -EINVAL; |
6503e5df MG |
305 | for (offset = 2; offset < video->brightness->count; offset++) |
306 | if (level == video->brightness->levels[offset]) { | |
307 | *state = video->brightness->count - offset - 1; | |
308 | return 0; | |
309 | } | |
702ed512 ZR |
310 | |
311 | return -EINVAL; | |
312 | } | |
313 | ||
314 | static int | |
4a703a8f | 315 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 316 | { |
4a703a8f | 317 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
318 | struct acpi_video_device *video = acpi_driver_data(device); |
319 | int level; | |
320 | ||
915ea7e4 | 321 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
322 | return -EINVAL; |
323 | ||
324 | state = video->brightness->count - state; | |
915ea7e4 | 325 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
326 | return acpi_video_device_lcd_set_level(video, level); |
327 | } | |
328 | ||
9c8b04be | 329 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
330 | .get_max_state = video_get_max_state, |
331 | .get_cur_state = video_get_cur_state, | |
332 | .set_cur_state = video_set_cur_state, | |
333 | }; | |
334 | ||
21fcb34e FC |
335 | /* |
336 | * -------------------------------------------------------------------------- | |
337 | * Video Management | |
338 | * -------------------------------------------------------------------------- | |
339 | */ | |
1da177e4 | 340 | |
1da177e4 | 341 | static int |
4be44fcd LB |
342 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
343 | union acpi_object **levels) | |
1da177e4 | 344 | { |
4be44fcd LB |
345 | int status; |
346 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
347 | union acpi_object *obj; | |
1da177e4 | 348 | |
1da177e4 LT |
349 | |
350 | *levels = NULL; | |
351 | ||
90130268 | 352 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 353 | if (!ACPI_SUCCESS(status)) |
d550d98d | 354 | return status; |
4be44fcd | 355 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 356 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 357 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
358 | status = -EFAULT; |
359 | goto err; | |
360 | } | |
361 | ||
362 | *levels = obj; | |
363 | ||
d550d98d | 364 | return 0; |
1da177e4 | 365 | |
915ea7e4 | 366 | err: |
6044ec88 | 367 | kfree(buffer.pointer); |
1da177e4 | 368 | |
d550d98d | 369 | return status; |
1da177e4 LT |
370 | } |
371 | ||
372 | static int | |
4be44fcd | 373 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 374 | { |
24450c7a | 375 | int status; |
9e6dada9 | 376 | int state; |
1da177e4 | 377 | |
0db98202 JL |
378 | status = acpi_execute_simple_method(device->dev->handle, |
379 | "_BCM", level); | |
24450c7a ZR |
380 | if (ACPI_FAILURE(status)) { |
381 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
382 | return -EIO; | |
383 | } | |
384 | ||
4500ca8e | 385 | device->brightness->curr = level; |
9e6dada9 | 386 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 387 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
388 | if (device->backlight) |
389 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
390 | return 0; |
391 | } | |
9e6dada9 | 392 | |
24450c7a ZR |
393 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
394 | return -EINVAL; | |
1da177e4 LT |
395 | } |
396 | ||
45cb50e6 ZR |
397 | /* |
398 | * For some buggy _BQC methods, we need to add a constant value to | |
399 | * the _BQC return value to get the actual current brightness level | |
400 | */ | |
401 | ||
402 | static int bqc_offset_aml_bug_workaround; | |
403 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
404 | { | |
405 | bqc_offset_aml_bug_workaround = 9; | |
406 | return 0; | |
407 | } | |
408 | ||
129ff8f8 ZR |
409 | static int video_ignore_initial_backlight(const struct dmi_system_id *d) |
410 | { | |
411 | use_bios_initial_backlight = 0; | |
412 | return 0; | |
413 | } | |
414 | ||
45cb50e6 ZR |
415 | static struct dmi_system_id video_dmi_table[] __initdata = { |
416 | /* | |
417 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
418 | */ | |
419 | { | |
420 | .callback = video_set_bqc_offset, | |
421 | .ident = "Acer Aspire 5720", | |
422 | .matches = { | |
423 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
424 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
425 | }, | |
426 | }, | |
5afc4abe LB |
427 | { |
428 | .callback = video_set_bqc_offset, | |
429 | .ident = "Acer Aspire 5710Z", | |
430 | .matches = { | |
431 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
432 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
433 | }, | |
434 | }, | |
34ac272b ZR |
435 | { |
436 | .callback = video_set_bqc_offset, | |
437 | .ident = "eMachines E510", | |
438 | .matches = { | |
439 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
440 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
441 | }, | |
442 | }, | |
93bcece2 ZR |
443 | { |
444 | .callback = video_set_bqc_offset, | |
445 | .ident = "Acer Aspire 5315", | |
446 | .matches = { | |
447 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
448 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
449 | }, | |
450 | }, | |
152a4e63 ZR |
451 | { |
452 | .callback = video_set_bqc_offset, | |
453 | .ident = "Acer Aspire 7720", | |
454 | .matches = { | |
455 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
456 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
457 | }, | |
458 | }, | |
129ff8f8 ZR |
459 | { |
460 | .callback = video_ignore_initial_backlight, | |
461 | .ident = "HP Folio 13-2000", | |
462 | .matches = { | |
463 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
464 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), | |
465 | }, | |
466 | }, | |
9657a565 LT |
467 | { |
468 | .callback = video_ignore_initial_backlight, | |
469 | .ident = "Fujitsu E753", | |
470 | .matches = { | |
471 | DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"), | |
472 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"), | |
473 | }, | |
474 | }, | |
771d09b3 GMDV |
475 | { |
476 | .callback = video_ignore_initial_backlight, | |
477 | .ident = "HP Pavilion dm4", | |
478 | .matches = { | |
479 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
480 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), | |
481 | }, | |
482 | }, | |
780a6ec6 AW |
483 | { |
484 | .callback = video_ignore_initial_backlight, | |
485 | .ident = "HP Pavilion g6 Notebook PC", | |
486 | .matches = { | |
487 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
488 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), | |
489 | }, | |
490 | }, | |
4ef366c5 AH |
491 | { |
492 | .callback = video_ignore_initial_backlight, | |
493 | .ident = "HP 1000 Notebook PC", | |
494 | .matches = { | |
495 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
496 | DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), | |
497 | }, | |
498 | }, | |
fedbe9bc AH |
499 | { |
500 | .callback = video_ignore_initial_backlight, | |
501 | .ident = "HP Pavilion m4", | |
502 | .matches = { | |
503 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
504 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), | |
505 | }, | |
506 | }, | |
45cb50e6 ZR |
507 | {} |
508 | }; | |
509 | ||
994fa63c DB |
510 | static unsigned long long |
511 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
512 | unsigned long long bqc_value) | |
513 | { | |
514 | unsigned long long level; | |
515 | ||
516 | if (device->brightness->flags._BQC_use_index) { | |
517 | /* | |
518 | * _BQC returns an index that doesn't account for | |
519 | * the first 2 items with special meaning, so we need | |
520 | * to compensate for that by offsetting ourselves | |
521 | */ | |
522 | if (device->brightness->flags._BCL_reversed) | |
523 | bqc_value = device->brightness->count - 3 - bqc_value; | |
524 | ||
525 | level = device->brightness->levels[bqc_value + 2]; | |
526 | } else { | |
527 | level = bqc_value; | |
528 | } | |
529 | ||
530 | level += bqc_offset_aml_bug_workaround; | |
531 | ||
532 | return level; | |
533 | } | |
534 | ||
1da177e4 | 535 | static int |
4be44fcd | 536 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 537 | unsigned long long *level, bool raw) |
1da177e4 | 538 | { |
c8890f90 | 539 | acpi_status status = AE_OK; |
4e231fa4 | 540 | int i; |
c8890f90 | 541 | |
c60d638e ZR |
542 | if (device->cap._BQC || device->cap._BCQ) { |
543 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
544 | ||
545 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
546 | NULL, level); |
547 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
548 | if (raw) { |
549 | /* | |
550 | * Caller has indicated he wants the raw | |
551 | * value returned by _BQC, so don't furtherly | |
552 | * mess with the value. | |
553 | */ | |
554 | return 0; | |
555 | } | |
556 | ||
994fa63c | 557 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 558 | |
4e231fa4 VS |
559 | for (i = 2; i < device->brightness->count; i++) |
560 | if (device->brightness->levels[i] == *level) { | |
561 | device->brightness->curr = *level; | |
562 | return 0; | |
915ea7e4 | 563 | } |
a89803df DB |
564 | /* |
565 | * BQC returned an invalid level. | |
566 | * Stop using it. | |
567 | */ | |
568 | ACPI_WARNING((AE_INFO, | |
569 | "%s returned an invalid level", | |
570 | buf)); | |
571 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 572 | } else { |
21fcb34e FC |
573 | /* |
574 | * Fixme: | |
c8890f90 ZR |
575 | * should we return an error or ignore this failure? |
576 | * dev->brightness->curr is a cached value which stores | |
577 | * the correct current backlight level in most cases. | |
578 | * ACPI video backlight still works w/ buggy _BQC. | |
579 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
580 | */ | |
c60d638e ZR |
581 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
582 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
583 | } |
584 | } | |
585 | ||
4500ca8e | 586 | *level = device->brightness->curr; |
c8890f90 | 587 | return 0; |
1da177e4 LT |
588 | } |
589 | ||
590 | static int | |
4be44fcd LB |
591 | acpi_video_device_EDID(struct acpi_video_device *device, |
592 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 593 | { |
4be44fcd LB |
594 | int status; |
595 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
596 | union acpi_object *obj; | |
597 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
598 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 599 | |
1da177e4 LT |
600 | |
601 | *edid = NULL; | |
602 | ||
603 | if (!device) | |
d550d98d | 604 | return -ENODEV; |
1da177e4 LT |
605 | if (length == 128) |
606 | arg0.integer.value = 1; | |
607 | else if (length == 256) | |
608 | arg0.integer.value = 2; | |
609 | else | |
d550d98d | 610 | return -EINVAL; |
1da177e4 | 611 | |
90130268 | 612 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 613 | if (ACPI_FAILURE(status)) |
d550d98d | 614 | return -ENODEV; |
1da177e4 | 615 | |
50dd0969 | 616 | obj = buffer.pointer; |
1da177e4 LT |
617 | |
618 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
619 | *edid = obj; | |
620 | else { | |
6468463a | 621 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
622 | status = -EFAULT; |
623 | kfree(obj); | |
624 | } | |
625 | ||
d550d98d | 626 | return status; |
1da177e4 LT |
627 | } |
628 | ||
1da177e4 LT |
629 | /* bus */ |
630 | ||
1da177e4 LT |
631 | /* |
632 | * Arg: | |
21fcb34e FC |
633 | * video : video bus device pointer |
634 | * bios_flag : | |
1da177e4 LT |
635 | * 0. The system BIOS should NOT automatically switch(toggle) |
636 | * the active display output. | |
637 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 638 | * active display output. No switch event. |
1da177e4 LT |
639 | * 2. The _DGS value should be locked. |
640 | * 3. The system BIOS should not automatically switch (toggle) the | |
641 | * active display output, but instead generate the display switch | |
642 | * event notify code. | |
643 | * lcd_flag : | |
644 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 645 | * of the LCD when the power changes from AC to DC |
21fcb34e | 646 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 647 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 648 | * Return Value: |
ea9f8856 | 649 | * -EINVAL wrong arg. |
1da177e4 LT |
650 | */ |
651 | ||
652 | static int | |
4be44fcd | 653 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 654 | { |
ea9f8856 | 655 | acpi_status status; |
1da177e4 | 656 | |
b0373843 ZR |
657 | if (!video->cap._DOS) |
658 | return 0; | |
1da177e4 | 659 | |
ea9f8856 IM |
660 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
661 | return -EINVAL; | |
0db98202 JL |
662 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
663 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
664 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
665 | if (ACPI_FAILURE(status)) |
666 | return -EIO; | |
1da177e4 | 667 | |
ea9f8856 | 668 | return 0; |
1da177e4 LT |
669 | } |
670 | ||
935e5f29 ZR |
671 | /* |
672 | * Simple comparison function used to sort backlight levels. | |
673 | */ | |
674 | ||
675 | static int | |
676 | acpi_video_cmp_level(const void *a, const void *b) | |
677 | { | |
678 | return *(int *)a - *(int *)b; | |
679 | } | |
680 | ||
a50188da AL |
681 | /* |
682 | * Decides if _BQC/_BCQ for this system is usable | |
683 | * | |
684 | * We do this by changing the level first and then read out the current | |
685 | * brightness level, if the value does not match, find out if it is using | |
686 | * index. If not, clear the _BQC/_BCQ capability. | |
687 | */ | |
688 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
689 | int max_level, int current_level) | |
690 | { | |
691 | struct acpi_video_device_brightness *br = device->brightness; | |
692 | int result; | |
693 | unsigned long long level; | |
694 | int test_level; | |
695 | ||
696 | /* don't mess with existing known broken systems */ | |
697 | if (bqc_offset_aml_bug_workaround) | |
698 | return 0; | |
699 | ||
700 | /* | |
701 | * Some systems always report current brightness level as maximum | |
702 | * through _BQC, we need to test another value for them. | |
703 | */ | |
b3b301c5 | 704 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
705 | |
706 | result = acpi_video_device_lcd_set_level(device, test_level); | |
707 | if (result) | |
708 | return result; | |
709 | ||
710 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
711 | if (result) | |
712 | return result; | |
713 | ||
714 | if (level != test_level) { | |
715 | /* buggy _BQC found, need to find out if it uses index */ | |
716 | if (level < br->count) { | |
717 | if (br->flags._BCL_reversed) | |
718 | level = br->count - 3 - level; | |
719 | if (br->levels[level + 2] == test_level) | |
720 | br->flags._BQC_use_index = 1; | |
721 | } | |
722 | ||
723 | if (!br->flags._BQC_use_index) | |
724 | device->cap._BQC = device->cap._BCQ = 0; | |
725 | } | |
726 | ||
727 | return 0; | |
728 | } | |
729 | ||
730 | ||
1da177e4 | 731 | /* |
21fcb34e FC |
732 | * Arg: |
733 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
734 | * |
735 | * Return Value: | |
469778c1 JJ |
736 | * Maximum brightness level |
737 | * | |
738 | * Allocate and initialize device->brightness. | |
739 | */ | |
740 | ||
741 | static int | |
742 | acpi_video_init_brightness(struct acpi_video_device *device) | |
743 | { | |
744 | union acpi_object *obj = NULL; | |
d32f6947 | 745 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 746 | unsigned long long level, level_old; |
469778c1 JJ |
747 | union acpi_object *o; |
748 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 749 | int result = -EINVAL; |
469778c1 JJ |
750 | |
751 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
752 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
753 | "LCD brightness level\n")); | |
754 | goto out; | |
755 | } | |
756 | ||
757 | if (obj->package.count < 2) | |
758 | goto out; | |
759 | ||
760 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
761 | if (!br) { | |
762 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 763 | result = -ENOMEM; |
469778c1 JJ |
764 | goto out; |
765 | } | |
766 | ||
d32f6947 | 767 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 768 | GFP_KERNEL); |
1a7c618a ZR |
769 | if (!br->levels) { |
770 | result = -ENOMEM; | |
469778c1 | 771 | goto out_free; |
1a7c618a | 772 | } |
469778c1 JJ |
773 | |
774 | for (i = 0; i < obj->package.count; i++) { | |
775 | o = (union acpi_object *)&obj->package.elements[i]; | |
776 | if (o->type != ACPI_TYPE_INTEGER) { | |
777 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
778 | continue; | |
779 | } | |
780 | br->levels[count] = (u32) o->integer.value; | |
781 | ||
782 | if (br->levels[count] > max_level) | |
783 | max_level = br->levels[count]; | |
784 | count++; | |
785 | } | |
786 | ||
d32f6947 ZR |
787 | /* |
788 | * some buggy BIOS don't export the levels | |
789 | * when machine is on AC/Battery in _BCL package. | |
790 | * In this case, the first two elements in _BCL packages | |
791 | * are also supported brightness levels that OS should take care of. | |
792 | */ | |
90af2cf6 ZR |
793 | for (i = 2; i < count; i++) { |
794 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 795 | level_ac_battery++; |
90af2cf6 ZR |
796 | if (br->levels[i] == br->levels[1]) |
797 | level_ac_battery++; | |
798 | } | |
d32f6947 ZR |
799 | |
800 | if (level_ac_battery < 2) { | |
801 | level_ac_battery = 2 - level_ac_battery; | |
802 | br->flags._BCL_no_ac_battery_levels = 1; | |
803 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
804 | br->levels[i] = br->levels[i - level_ac_battery]; | |
805 | count += level_ac_battery; | |
806 | } else if (level_ac_battery > 2) | |
bf6787eb | 807 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 808 | |
d80fb99f ZR |
809 | /* Check if the _BCL package is in a reversed order */ |
810 | if (max_level == br->levels[2]) { | |
811 | br->flags._BCL_reversed = 1; | |
812 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
813 | acpi_video_cmp_level, NULL); | |
814 | } else if (max_level != br->levels[count - 1]) | |
815 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 816 | "Found unordered _BCL package")); |
469778c1 JJ |
817 | |
818 | br->count = count; | |
819 | device->brightness = br; | |
1a7c618a | 820 | |
1a7c618a | 821 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 822 | br->curr = level = max_level; |
e047cca6 ZR |
823 | |
824 | if (!device->cap._BQC) | |
825 | goto set_level; | |
826 | ||
a89803df DB |
827 | result = acpi_video_device_lcd_get_level_current(device, |
828 | &level_old, true); | |
1a7c618a ZR |
829 | if (result) |
830 | goto out_free_levels; | |
831 | ||
a50188da | 832 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
833 | if (result) |
834 | goto out_free_levels; | |
a50188da AL |
835 | /* |
836 | * cap._BQC may get cleared due to _BQC is found to be broken | |
837 | * in acpi_video_bqc_quirk, so check again here. | |
838 | */ | |
839 | if (!device->cap._BQC) | |
840 | goto set_level; | |
e047cca6 | 841 | |
994fa63c DB |
842 | if (use_bios_initial_backlight) { |
843 | level = acpi_video_bqc_value_to_level(device, level_old); | |
90c53ca4 | 844 | /* |
994fa63c DB |
845 | * On some buggy laptops, _BQC returns an uninitialized |
846 | * value when invoked for the first time, i.e. | |
847 | * level_old is invalid (no matter whether it's a level | |
848 | * or an index). Set the backlight to max_level in this case. | |
90c53ca4 | 849 | */ |
994fa63c | 850 | for (i = 2; i < br->count; i++) |
9efa5e50 | 851 | if (level == br->levels[i]) |
994fa63c | 852 | break; |
2c62333a | 853 | if (i == br->count || !level) |
994fa63c | 854 | level = max_level; |
90c53ca4 | 855 | } |
e047cca6 | 856 | |
e047cca6 | 857 | set_level: |
90c53ca4 | 858 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
859 | if (result) |
860 | goto out_free_levels; | |
1a7c618a | 861 | |
d32f6947 ZR |
862 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
863 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 864 | kfree(obj); |
1a7c618a | 865 | return result; |
469778c1 JJ |
866 | |
867 | out_free_levels: | |
868 | kfree(br->levels); | |
869 | out_free: | |
870 | kfree(br); | |
871 | out: | |
872 | device->brightness = NULL; | |
873 | kfree(obj); | |
1a7c618a | 874 | return result; |
469778c1 JJ |
875 | } |
876 | ||
877 | /* | |
878 | * Arg: | |
879 | * device : video output device (LCD, CRT, ..) | |
880 | * | |
881 | * Return Value: | |
21fcb34e | 882 | * None |
1da177e4 | 883 | * |
98fb8fe1 | 884 | * Find out all required AML methods defined under the output |
1da177e4 LT |
885 | * device. |
886 | */ | |
887 | ||
4be44fcd | 888 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 889 | { |
952c63e9 | 890 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 891 | device->cap._ADR = 1; |
952c63e9 | 892 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 893 | device->cap._BCL = 1; |
952c63e9 | 894 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 895 | device->cap._BCM = 1; |
952c63e9 | 896 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 897 | device->cap._BQC = 1; |
952c63e9 | 898 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
899 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
900 | device->cap._BCQ = 1; | |
901 | } | |
902 | ||
952c63e9 | 903 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 904 | device->cap._DDC = 1; |
1da177e4 LT |
905 | } |
906 | ||
907 | /* | |
21fcb34e FC |
908 | * Arg: |
909 | * device : video output device (VGA) | |
1da177e4 LT |
910 | * |
911 | * Return Value: | |
21fcb34e | 912 | * None |
1da177e4 | 913 | * |
98fb8fe1 | 914 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
915 | */ |
916 | ||
4be44fcd | 917 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 918 | { |
952c63e9 | 919 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 920 | video->cap._DOS = 1; |
952c63e9 | 921 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 922 | video->cap._DOD = 1; |
952c63e9 | 923 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 924 | video->cap._ROM = 1; |
952c63e9 | 925 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 926 | video->cap._GPD = 1; |
952c63e9 | 927 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 928 | video->cap._SPD = 1; |
952c63e9 | 929 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 930 | video->cap._VPO = 1; |
1da177e4 LT |
931 | } |
932 | ||
933 | /* | |
934 | * Check whether the video bus device has required AML method to | |
935 | * support the desired features | |
936 | */ | |
937 | ||
4be44fcd | 938 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 939 | { |
4be44fcd | 940 | acpi_status status = -ENOENT; |
1e4cffe7 | 941 | struct pci_dev *dev; |
1da177e4 LT |
942 | |
943 | if (!video) | |
d550d98d | 944 | return -EINVAL; |
1da177e4 | 945 | |
1e4cffe7 | 946 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
947 | if (!dev) |
948 | return -ENODEV; | |
1e4cffe7 | 949 | pci_dev_put(dev); |
22c13f9d | 950 | |
21fcb34e FC |
951 | /* |
952 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
953 | * to check well known required nodes. |
954 | */ | |
955 | ||
98fb8fe1 | 956 | /* Does this device support video switching? */ |
3a1151e3 SB |
957 | if (video->cap._DOS || video->cap._DOD) { |
958 | if (!video->cap._DOS) { | |
959 | printk(KERN_WARNING FW_BUG | |
960 | "ACPI(%s) defines _DOD but not _DOS\n", | |
961 | acpi_device_bid(video->device)); | |
962 | } | |
1da177e4 LT |
963 | video->flags.multihead = 1; |
964 | status = 0; | |
965 | } | |
966 | ||
98fb8fe1 | 967 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 968 | if (video->cap._ROM) { |
1da177e4 LT |
969 | video->flags.rom = 1; |
970 | status = 0; | |
971 | } | |
972 | ||
98fb8fe1 | 973 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 974 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
975 | video->flags.post = 1; |
976 | status = 0; | |
977 | } | |
978 | ||
d550d98d | 979 | return status; |
1da177e4 LT |
980 | } |
981 | ||
21fcb34e FC |
982 | /* |
983 | * -------------------------------------------------------------------------- | |
984 | * Driver Interface | |
985 | * -------------------------------------------------------------------------- | |
986 | */ | |
1da177e4 LT |
987 | |
988 | /* device interface */ | |
915ea7e4 | 989 | static struct acpi_video_device_attrib * |
82cae999 RZ |
990 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
991 | { | |
78eed028 DT |
992 | struct acpi_video_enumerated_device *ids; |
993 | int i; | |
994 | ||
995 | for (i = 0; i < video->attached_count; i++) { | |
996 | ids = &video->attached_array[i]; | |
997 | if ((ids->value.int_val & 0xffff) == device_id) | |
998 | return &ids->value.attrib; | |
999 | } | |
82cae999 | 1000 | |
82cae999 RZ |
1001 | return NULL; |
1002 | } | |
1da177e4 | 1003 | |
e92a7162 MG |
1004 | static int |
1005 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1006 | unsigned long device_id) | |
1007 | { | |
1008 | struct acpi_video_enumerated_device *ids; | |
1009 | int i; | |
1010 | ||
1011 | for (i = 0; i < video->attached_count; i++) { | |
1012 | ids = &video->attached_array[i]; | |
1013 | if ((ids->value.int_val & 0xffff) == device_id) | |
1014 | return ids->value.int_val; | |
1015 | } | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
1da177e4 | 1020 | static int |
4be44fcd LB |
1021 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1022 | struct acpi_video_bus *video) | |
1da177e4 | 1023 | { |
27663c58 | 1024 | unsigned long long device_id; |
e92a7162 | 1025 | int status, device_type; |
4be44fcd | 1026 | struct acpi_video_device *data; |
915ea7e4 | 1027 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1028 | |
4be44fcd LB |
1029 | status = |
1030 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1031 | /* Some device omits _ADR, we skip them instead of fail */ |
1032 | if (ACPI_FAILURE(status)) | |
1033 | return 0; | |
1da177e4 | 1034 | |
91e13aa3 AL |
1035 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1036 | if (!data) | |
1037 | return -ENOMEM; | |
82cae999 | 1038 | |
91e13aa3 AL |
1039 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1040 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1041 | device->driver_data = data; | |
1042 | ||
1043 | data->device_id = device_id; | |
1044 | data->video = video; | |
1045 | data->dev = device; | |
1046 | ||
1047 | attribute = acpi_video_get_device_attr(video, device_id); | |
1048 | ||
915ea7e4 | 1049 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1050 | switch (attribute->display_type) { |
1051 | case ACPI_VIDEO_DISPLAY_CRT: | |
1052 | data->flags.crt = 1; | |
1053 | break; | |
1054 | case ACPI_VIDEO_DISPLAY_TV: | |
1055 | data->flags.tvout = 1; | |
1056 | break; | |
1057 | case ACPI_VIDEO_DISPLAY_DVI: | |
1058 | data->flags.dvi = 1; | |
1059 | break; | |
1060 | case ACPI_VIDEO_DISPLAY_LCD: | |
1061 | data->flags.lcd = 1; | |
1062 | break; | |
1063 | default: | |
1064 | data->flags.unknown = 1; | |
1065 | break; | |
1066 | } | |
915ea7e4 | 1067 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1068 | data->flags.bios = 1; |
1069 | } else { | |
1070 | /* Check for legacy IDs */ | |
1071 | device_type = acpi_video_get_device_type(video, device_id); | |
1072 | /* Ignore bits 16 and 18-20 */ | |
1073 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1074 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1075 | data->flags.crt = 1; | |
1076 | break; | |
1077 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1078 | data->flags.lcd = 1; | |
1079 | break; | |
1080 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1081 | data->flags.tvout = 1; | |
1082 | break; | |
1083 | default: | |
1084 | data->flags.unknown = 1; | |
e92a7162 | 1085 | } |
91e13aa3 | 1086 | } |
4be44fcd | 1087 | |
91e13aa3 AL |
1088 | acpi_video_device_bind(video, data); |
1089 | acpi_video_device_find_cap(data); | |
1da177e4 | 1090 | |
91e13aa3 AL |
1091 | mutex_lock(&video->device_list_lock); |
1092 | list_add_tail(&data->entry, &video->video_device_list); | |
1093 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1094 | |
91e13aa3 | 1095 | return status; |
1da177e4 LT |
1096 | } |
1097 | ||
1098 | /* | |
1099 | * Arg: | |
21fcb34e | 1100 | * video : video bus device |
1da177e4 LT |
1101 | * |
1102 | * Return: | |
21fcb34e FC |
1103 | * none |
1104 | * | |
1105 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1106 | * bind the ids with the corresponding video devices |
1107 | * under the video bus. | |
4be44fcd | 1108 | */ |
1da177e4 | 1109 | |
4be44fcd | 1110 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1111 | { |
ff102ea9 DT |
1112 | struct acpi_video_device *dev; |
1113 | ||
bbac81f5 | 1114 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1115 | |
1116 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1117 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1118 | |
bbac81f5 | 1119 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1120 | } |
1121 | ||
1122 | /* | |
1123 | * Arg: | |
21fcb34e FC |
1124 | * video : video bus device |
1125 | * device : video output device under the video | |
1126 | * bus | |
1da177e4 LT |
1127 | * |
1128 | * Return: | |
21fcb34e FC |
1129 | * none |
1130 | * | |
1da177e4 LT |
1131 | * Bind the ids with the corresponding video devices |
1132 | * under the video bus. | |
4be44fcd | 1133 | */ |
1da177e4 LT |
1134 | |
1135 | static void | |
4be44fcd LB |
1136 | acpi_video_device_bind(struct acpi_video_bus *video, |
1137 | struct acpi_video_device *device) | |
1da177e4 | 1138 | { |
78eed028 | 1139 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1140 | int i; |
1da177e4 | 1141 | |
78eed028 DT |
1142 | for (i = 0; i < video->attached_count; i++) { |
1143 | ids = &video->attached_array[i]; | |
1144 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1145 | ids->bind_info = device; | |
1da177e4 LT |
1146 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1147 | } | |
1148 | } | |
1da177e4 LT |
1149 | } |
1150 | ||
1151 | /* | |
1152 | * Arg: | |
21fcb34e | 1153 | * video : video bus device |
1da177e4 LT |
1154 | * |
1155 | * Return: | |
21fcb34e FC |
1156 | * < 0 : error |
1157 | * | |
1da177e4 LT |
1158 | * Call _DOD to enumerate all devices attached to display adapter |
1159 | * | |
4be44fcd | 1160 | */ |
1da177e4 LT |
1161 | |
1162 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1163 | { | |
4be44fcd LB |
1164 | int status; |
1165 | int count; | |
1166 | int i; | |
78eed028 | 1167 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1168 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1169 | union acpi_object *dod = NULL; | |
1170 | union acpi_object *obj; | |
1da177e4 | 1171 | |
90130268 | 1172 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1173 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1174 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1175 | return status; |
1da177e4 LT |
1176 | } |
1177 | ||
50dd0969 | 1178 | dod = buffer.pointer; |
1da177e4 | 1179 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1180 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1181 | status = -EFAULT; |
1182 | goto out; | |
1183 | } | |
1184 | ||
1185 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1186 | dod->package.count)); |
1da177e4 | 1187 | |
78eed028 DT |
1188 | active_list = kcalloc(1 + dod->package.count, |
1189 | sizeof(struct acpi_video_enumerated_device), | |
1190 | GFP_KERNEL); | |
1191 | if (!active_list) { | |
1da177e4 LT |
1192 | status = -ENOMEM; |
1193 | goto out; | |
1194 | } | |
1195 | ||
1196 | count = 0; | |
1197 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1198 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1199 | |
1200 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1201 | printk(KERN_ERR PREFIX |
1202 | "Invalid _DOD data in element %d\n", i); | |
1203 | continue; | |
1da177e4 | 1204 | } |
78eed028 DT |
1205 | |
1206 | active_list[count].value.int_val = obj->integer.value; | |
1207 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1208 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1209 | (int)obj->integer.value)); | |
1da177e4 LT |
1210 | count++; |
1211 | } | |
1da177e4 | 1212 | |
6044ec88 | 1213 | kfree(video->attached_array); |
4be44fcd | 1214 | |
78eed028 | 1215 | video->attached_array = active_list; |
1da177e4 | 1216 | video->attached_count = count; |
78eed028 | 1217 | |
915ea7e4 | 1218 | out: |
02438d87 | 1219 | kfree(buffer.pointer); |
d550d98d | 1220 | return status; |
1da177e4 LT |
1221 | } |
1222 | ||
4be44fcd LB |
1223 | static int |
1224 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1225 | u32 level_current, u32 event) | |
1da177e4 | 1226 | { |
63f0edfc | 1227 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1228 | max = max_below = 0; |
1229 | min = min_above = 255; | |
63f0edfc | 1230 | /* Find closest level to level_current */ |
0a3db1ce | 1231 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1232 | l = device->brightness->levels[i]; |
1233 | if (abs(l - level_current) < abs(delta)) { | |
1234 | delta = l - level_current; | |
1235 | if (!delta) | |
1236 | break; | |
1237 | } | |
1238 | } | |
1239 | /* Ajust level_current to closest available level */ | |
1240 | level_current += delta; | |
0a3db1ce | 1241 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1242 | l = device->brightness->levels[i]; |
1243 | if (l < min) | |
1244 | min = l; | |
1245 | if (l > max) | |
1246 | max = l; | |
1247 | if (l < min_above && l > level_current) | |
1248 | min_above = l; | |
1249 | if (l > max_below && l < level_current) | |
1250 | max_below = l; | |
1251 | } | |
1252 | ||
1253 | switch (event) { | |
1254 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1255 | return (level_current < max) ? min_above : min; | |
1256 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1257 | return (level_current < max) ? min_above : max; | |
1258 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1259 | return (level_current > min) ? max_below : min; | |
1260 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1261 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1262 | return 0; | |
1263 | default: | |
1264 | return level_current; | |
1265 | } | |
1da177e4 LT |
1266 | } |
1267 | ||
c8890f90 | 1268 | static int |
4be44fcd | 1269 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1270 | { |
27663c58 | 1271 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1272 | int result = -EINVAL; |
1273 | ||
fbc9fe1b AL |
1274 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1275 | if (!acpi_video_verify_backlight_support()) | |
28c32e99 ZR |
1276 | return 0; |
1277 | ||
469778c1 | 1278 | if (!device->brightness) |
c8890f90 ZR |
1279 | goto out; |
1280 | ||
1281 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1282 | &level_current, |
1283 | false); | |
c8890f90 ZR |
1284 | if (result) |
1285 | goto out; | |
1286 | ||
1da177e4 | 1287 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1288 | |
24450c7a | 1289 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1290 | |
36342742 MG |
1291 | if (!result) |
1292 | backlight_force_update(device->backlight, | |
1293 | BACKLIGHT_UPDATE_HOTKEY); | |
1294 | ||
c8890f90 ZR |
1295 | out: |
1296 | if (result) | |
1297 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1298 | ||
1299 | return result; | |
1da177e4 LT |
1300 | } |
1301 | ||
e92a7162 MG |
1302 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1303 | void **edid) | |
1304 | { | |
1305 | struct acpi_video_bus *video; | |
1306 | struct acpi_video_device *video_device; | |
1307 | union acpi_object *buffer = NULL; | |
1308 | acpi_status status; | |
1309 | int i, length; | |
1310 | ||
1311 | if (!device || !acpi_driver_data(device)) | |
1312 | return -EINVAL; | |
1313 | ||
1314 | video = acpi_driver_data(device); | |
1315 | ||
1316 | for (i = 0; i < video->attached_count; i++) { | |
1317 | video_device = video->attached_array[i].bind_info; | |
1318 | length = 256; | |
1319 | ||
1320 | if (!video_device) | |
1321 | continue; | |
1322 | ||
82069552 ZR |
1323 | if (!video_device->cap._DDC) |
1324 | continue; | |
1325 | ||
e92a7162 MG |
1326 | if (type) { |
1327 | switch (type) { | |
1328 | case ACPI_VIDEO_DISPLAY_CRT: | |
1329 | if (!video_device->flags.crt) | |
1330 | continue; | |
1331 | break; | |
1332 | case ACPI_VIDEO_DISPLAY_TV: | |
1333 | if (!video_device->flags.tvout) | |
1334 | continue; | |
1335 | break; | |
1336 | case ACPI_VIDEO_DISPLAY_DVI: | |
1337 | if (!video_device->flags.dvi) | |
1338 | continue; | |
1339 | break; | |
1340 | case ACPI_VIDEO_DISPLAY_LCD: | |
1341 | if (!video_device->flags.lcd) | |
1342 | continue; | |
1343 | break; | |
1344 | } | |
1345 | } else if (video_device->device_id != device_id) { | |
1346 | continue; | |
1347 | } | |
1348 | ||
1349 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1350 | ||
1351 | if (ACPI_FAILURE(status) || !buffer || | |
1352 | buffer->type != ACPI_TYPE_BUFFER) { | |
1353 | length = 128; | |
1354 | status = acpi_video_device_EDID(video_device, &buffer, | |
1355 | length); | |
1356 | if (ACPI_FAILURE(status) || !buffer || | |
1357 | buffer->type != ACPI_TYPE_BUFFER) { | |
1358 | continue; | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | *edid = buffer->buffer.pointer; | |
1363 | return length; | |
1364 | } | |
1365 | ||
1366 | return -ENODEV; | |
1367 | } | |
1368 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1369 | ||
1da177e4 | 1370 | static int |
4be44fcd LB |
1371 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1372 | struct acpi_device *device) | |
1da177e4 | 1373 | { |
fba4e087 | 1374 | int status = 0; |
ff102ea9 | 1375 | struct acpi_device *dev; |
1da177e4 | 1376 | |
fba4e087 IM |
1377 | /* |
1378 | * There are systems where video module known to work fine regardless | |
1379 | * of broken _DOD and ignoring returned value here doesn't cause | |
1380 | * any issues later. | |
1381 | */ | |
1382 | acpi_video_device_enumerate(video); | |
1da177e4 | 1383 | |
ff102ea9 | 1384 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1385 | |
1386 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1387 | if (status) { |
91e13aa3 AL |
1388 | dev_err(&dev->dev, "Can't attach device\n"); |
1389 | break; | |
1da177e4 | 1390 | } |
1da177e4 | 1391 | } |
d550d98d | 1392 | return status; |
1da177e4 LT |
1393 | } |
1394 | ||
1da177e4 LT |
1395 | /* acpi_video interface */ |
1396 | ||
efaa14c7 AL |
1397 | /* |
1398 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1399 | * preform any automatic brightness change on receiving a notification. | |
1400 | */ | |
4be44fcd | 1401 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1402 | { |
efaa14c7 | 1403 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1404 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1405 | } |
1406 | ||
4be44fcd | 1407 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1408 | { |
efaa14c7 | 1409 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1410 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1411 | } |
1412 | ||
7015558f | 1413 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1414 | { |
7015558f | 1415 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1416 | struct input_dev *input; |
17c452f9 | 1417 | int keycode = 0; |
e9dab196 | 1418 | |
67b662e1 | 1419 | if (!video || !video->input) |
d550d98d | 1420 | return; |
1da177e4 | 1421 | |
e9dab196 | 1422 | input = video->input; |
1da177e4 LT |
1423 | |
1424 | switch (event) { | |
98fb8fe1 | 1425 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1426 | * most likely via hotkey. */ |
8a37c65d | 1427 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1428 | break; |
1429 | ||
98fb8fe1 | 1430 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1431 | * connector. */ |
1432 | acpi_video_device_enumerate(video); | |
1433 | acpi_video_device_rebind(video); | |
e9dab196 | 1434 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1435 | break; |
1436 | ||
4be44fcd | 1437 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1438 | keycode = KEY_SWITCHVIDEOMODE; |
1439 | break; | |
4be44fcd | 1440 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1441 | keycode = KEY_VIDEO_NEXT; |
1442 | break; | |
4be44fcd | 1443 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1444 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1445 | break; |
1446 | ||
1447 | default: | |
1448 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1449 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1450 | break; |
1451 | } | |
1452 | ||
8a37c65d LT |
1453 | if (acpi_notifier_call_chain(device, event, 0)) |
1454 | /* Something vetoed the keypress. */ | |
1455 | keycode = 0; | |
17c452f9 MG |
1456 | |
1457 | if (keycode) { | |
1458 | input_report_key(input, keycode, 1); | |
1459 | input_sync(input); | |
1460 | input_report_key(input, keycode, 0); | |
1461 | input_sync(input); | |
1462 | } | |
e9dab196 | 1463 | |
d550d98d | 1464 | return; |
1da177e4 LT |
1465 | } |
1466 | ||
4be44fcd | 1467 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1468 | { |
50dd0969 | 1469 | struct acpi_video_device *video_device = data; |
4be44fcd | 1470 | struct acpi_device *device = NULL; |
e9dab196 LY |
1471 | struct acpi_video_bus *bus; |
1472 | struct input_dev *input; | |
17c452f9 | 1473 | int keycode = 0; |
1da177e4 | 1474 | |
1da177e4 | 1475 | if (!video_device) |
d550d98d | 1476 | return; |
1da177e4 | 1477 | |
e6afa0de | 1478 | device = video_device->dev; |
e9dab196 LY |
1479 | bus = video_device->video; |
1480 | input = bus->input; | |
1da177e4 LT |
1481 | |
1482 | switch (event) { | |
4be44fcd | 1483 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1484 | if (brightness_switch_enabled) |
1485 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1486 | keycode = KEY_BRIGHTNESS_CYCLE; |
1487 | break; | |
4be44fcd | 1488 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1489 | if (brightness_switch_enabled) |
1490 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1491 | keycode = KEY_BRIGHTNESSUP; |
1492 | break; | |
4be44fcd | 1493 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1494 | if (brightness_switch_enabled) |
1495 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1496 | keycode = KEY_BRIGHTNESSDOWN; |
1497 | break; | |
70f23fd6 | 1498 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1499 | if (brightness_switch_enabled) |
1500 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1501 | keycode = KEY_BRIGHTNESS_ZERO; |
1502 | break; | |
4be44fcd | 1503 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1504 | if (brightness_switch_enabled) |
1505 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 | 1506 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1507 | break; |
1508 | default: | |
1509 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1510 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1511 | break; |
1512 | } | |
e9dab196 | 1513 | |
7761f638 | 1514 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1515 | |
1516 | if (keycode) { | |
1517 | input_report_key(input, keycode, 1); | |
1518 | input_sync(input); | |
1519 | input_report_key(input, keycode, 0); | |
1520 | input_sync(input); | |
1521 | } | |
e9dab196 | 1522 | |
d550d98d | 1523 | return; |
1da177e4 LT |
1524 | } |
1525 | ||
ac7729da RW |
1526 | static int acpi_video_resume(struct notifier_block *nb, |
1527 | unsigned long val, void *ign) | |
863c1490 MG |
1528 | { |
1529 | struct acpi_video_bus *video; | |
1530 | struct acpi_video_device *video_device; | |
1531 | int i; | |
1532 | ||
ac7729da RW |
1533 | switch (val) { |
1534 | case PM_HIBERNATION_PREPARE: | |
1535 | case PM_SUSPEND_PREPARE: | |
1536 | case PM_RESTORE_PREPARE: | |
1537 | return NOTIFY_DONE; | |
1538 | } | |
863c1490 | 1539 | |
ac7729da RW |
1540 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1541 | ||
1542 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1543 | |
1544 | for (i = 0; i < video->attached_count; i++) { | |
1545 | video_device = video->attached_array[i].bind_info; | |
1546 | if (video_device && video_device->backlight) | |
1547 | acpi_video_set_brightness(video_device->backlight); | |
1548 | } | |
ac7729da RW |
1549 | |
1550 | return NOTIFY_OK; | |
863c1490 MG |
1551 | } |
1552 | ||
c504f8cb ZR |
1553 | static acpi_status |
1554 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1555 | void **return_value) | |
1556 | { | |
1557 | struct acpi_device *device = context; | |
1558 | struct acpi_device *sibling; | |
1559 | int result; | |
1560 | ||
1561 | if (handle == device->handle) | |
1562 | return AE_CTRL_TERMINATE; | |
1563 | ||
1564 | result = acpi_bus_get_device(handle, &sibling); | |
1565 | if (result) | |
1566 | return AE_OK; | |
1567 | ||
1568 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1569 | return AE_ALREADY_EXISTS; | |
1570 | ||
1571 | return AE_OK; | |
1572 | } | |
1573 | ||
67b662e1 AL |
1574 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1575 | { | |
fbc9fe1b | 1576 | if (acpi_video_verify_backlight_support()) { |
67b662e1 AL |
1577 | struct backlight_properties props; |
1578 | struct pci_dev *pdev; | |
1579 | acpi_handle acpi_parent; | |
1580 | struct device *parent = NULL; | |
1581 | int result; | |
1582 | static int count; | |
1583 | char *name; | |
1584 | ||
1585 | result = acpi_video_init_brightness(device); | |
1586 | if (result) | |
1587 | return; | |
1588 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1589 | if (!name) | |
1590 | return; | |
1591 | count++; | |
1592 | ||
1593 | acpi_get_parent(device->dev->handle, &acpi_parent); | |
1594 | ||
1595 | pdev = acpi_get_pci_dev(acpi_parent); | |
1596 | if (pdev) { | |
1597 | parent = &pdev->dev; | |
1598 | pci_dev_put(pdev); | |
1599 | } | |
1600 | ||
1601 | memset(&props, 0, sizeof(struct backlight_properties)); | |
1602 | props.type = BACKLIGHT_FIRMWARE; | |
1603 | props.max_brightness = device->brightness->count - 3; | |
1604 | device->backlight = backlight_device_register(name, | |
1605 | parent, | |
1606 | device, | |
1607 | &acpi_backlight_ops, | |
1608 | &props); | |
1609 | kfree(name); | |
1610 | if (IS_ERR(device->backlight)) | |
1611 | return; | |
1612 | ||
1613 | /* | |
1614 | * Save current brightness level in case we have to restore it | |
1615 | * before acpi_video_device_lcd_set_level() is called next time. | |
1616 | */ | |
1617 | device->backlight->props.brightness = | |
1618 | acpi_video_get_brightness(device->backlight); | |
1619 | ||
1620 | device->cooling_dev = thermal_cooling_device_register("LCD", | |
1621 | device->dev, &video_cooling_ops); | |
1622 | if (IS_ERR(device->cooling_dev)) { | |
1623 | /* | |
1624 | * Set cooling_dev to NULL so we don't crash trying to | |
1625 | * free it. | |
1626 | * Also, why the hell we are returning early and | |
1627 | * not attempt to register video output if cooling | |
1628 | * device registration failed? | |
1629 | * -- dtor | |
1630 | */ | |
1631 | device->cooling_dev = NULL; | |
1632 | return; | |
1633 | } | |
1634 | ||
1635 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1636 | device->cooling_dev->id); | |
1637 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1638 | &device->cooling_dev->device.kobj, | |
1639 | "thermal_cooling"); | |
1640 | if (result) | |
1641 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1642 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1643 | &device->dev->dev.kobj, "device"); | |
1644 | if (result) | |
1645 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) | |
1650 | { | |
1651 | struct acpi_video_device *dev; | |
1652 | ||
1653 | mutex_lock(&video->device_list_lock); | |
1654 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1655 | acpi_video_dev_register_backlight(dev); | |
1656 | mutex_unlock(&video->device_list_lock); | |
1657 | ||
1658 | video->pm_nb.notifier_call = acpi_video_resume; | |
1659 | video->pm_nb.priority = 0; | |
1660 | return register_pm_notifier(&video->pm_nb); | |
1661 | } | |
1662 | ||
1663 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1664 | { | |
1665 | if (device->backlight) { | |
1666 | backlight_device_unregister(device->backlight); | |
1667 | device->backlight = NULL; | |
1668 | } | |
1669 | if (device->brightness) { | |
1670 | kfree(device->brightness->levels); | |
1671 | kfree(device->brightness); | |
1672 | device->brightness = NULL; | |
1673 | } | |
1674 | if (device->cooling_dev) { | |
1675 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1676 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1677 | thermal_cooling_device_unregister(device->cooling_dev); | |
1678 | device->cooling_dev = NULL; | |
1679 | } | |
1680 | } | |
1681 | ||
1682 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1683 | { | |
1684 | struct acpi_video_device *dev; | |
1685 | int error = unregister_pm_notifier(&video->pm_nb); | |
1686 | ||
1687 | mutex_lock(&video->device_list_lock); | |
1688 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1689 | acpi_video_dev_unregister_backlight(dev); | |
1690 | mutex_unlock(&video->device_list_lock); | |
1691 | ||
1692 | return error; | |
1693 | } | |
1694 | ||
1695 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1696 | { | |
1697 | acpi_status status; | |
1698 | struct acpi_device *adev = device->dev; | |
1699 | ||
1700 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1701 | acpi_video_device_notify, device); | |
1702 | if (ACPI_FAILURE(status)) | |
1703 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1704 | else | |
1705 | device->flags.notify = 1; | |
1706 | } | |
1707 | ||
1708 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1709 | { | |
1710 | struct input_dev *input; | |
1711 | struct acpi_video_device *dev; | |
1712 | int error; | |
1713 | ||
1714 | video->input = input = input_allocate_device(); | |
1715 | if (!input) { | |
1716 | error = -ENOMEM; | |
1717 | goto out; | |
1718 | } | |
1719 | ||
1720 | error = acpi_video_bus_start_devices(video); | |
1721 | if (error) | |
1722 | goto err_free_input; | |
1723 | ||
1724 | snprintf(video->phys, sizeof(video->phys), | |
1725 | "%s/video/input0", acpi_device_hid(video->device)); | |
1726 | ||
1727 | input->name = acpi_device_name(video->device); | |
1728 | input->phys = video->phys; | |
1729 | input->id.bustype = BUS_HOST; | |
1730 | input->id.product = 0x06; | |
1731 | input->dev.parent = &video->device->dev; | |
1732 | input->evbit[0] = BIT(EV_KEY); | |
1733 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1734 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1735 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1736 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1737 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1738 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1739 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1740 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1741 | ||
1742 | error = input_register_device(input); | |
1743 | if (error) | |
1744 | goto err_stop_dev; | |
1745 | ||
1746 | mutex_lock(&video->device_list_lock); | |
1747 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1748 | acpi_video_dev_add_notify_handler(dev); | |
1749 | mutex_unlock(&video->device_list_lock); | |
1750 | ||
1751 | return 0; | |
1752 | ||
1753 | err_stop_dev: | |
1754 | acpi_video_bus_stop_devices(video); | |
1755 | err_free_input: | |
1756 | input_free_device(input); | |
1757 | video->input = NULL; | |
1758 | out: | |
1759 | return error; | |
1760 | } | |
1761 | ||
1762 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1763 | { | |
1764 | if (dev->flags.notify) { | |
1765 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1766 | acpi_video_device_notify); | |
1767 | dev->flags.notify = 0; | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1772 | { | |
1773 | struct acpi_video_device *dev; | |
1774 | ||
1775 | mutex_lock(&video->device_list_lock); | |
1776 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1777 | acpi_video_dev_remove_notify_handler(dev); | |
1778 | mutex_unlock(&video->device_list_lock); | |
1779 | ||
1780 | acpi_video_bus_stop_devices(video); | |
1781 | input_unregister_device(video->input); | |
1782 | video->input = NULL; | |
1783 | } | |
1784 | ||
1785 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1786 | { | |
1787 | struct acpi_video_device *dev, *next; | |
1788 | ||
1789 | mutex_lock(&video->device_list_lock); | |
1790 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1791 | list_del(&dev->entry); | |
1792 | kfree(dev); | |
1793 | } | |
1794 | mutex_unlock(&video->device_list_lock); | |
1795 | ||
1796 | return 0; | |
1797 | } | |
1798 | ||
ac7729da RW |
1799 | static int instance; |
1800 | ||
4be44fcd | 1801 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1802 | { |
f51e8391 | 1803 | struct acpi_video_bus *video; |
f51e8391 | 1804 | int error; |
c504f8cb ZR |
1805 | acpi_status status; |
1806 | ||
1807 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1808 | device->parent->handle, 1, | |
1809 | acpi_video_bus_match, NULL, | |
1810 | device, NULL); | |
1811 | if (status == AE_ALREADY_EXISTS) { | |
1812 | printk(KERN_WARNING FW_BUG | |
1813 | "Duplicate ACPI video bus devices for the" | |
1814 | " same VGA controller, please try module " | |
1815 | "parameter \"video.allow_duplicates=1\"" | |
1816 | "if the current driver doesn't work.\n"); | |
1817 | if (!allow_duplicates) | |
1818 | return -ENODEV; | |
1819 | } | |
1da177e4 | 1820 | |
36bcbec7 | 1821 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1822 | if (!video) |
d550d98d | 1823 | return -ENOMEM; |
1da177e4 | 1824 | |
e6d9da1d ZR |
1825 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1826 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1827 | if (instance) | |
1828 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1829 | instance++; |
e6d9da1d | 1830 | } |
f3b39f13 ZY |
1831 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1832 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1833 | if (instance) | |
1834 | device->pnp.bus_id[3] = '0' + instance; | |
1835 | instance++; | |
1836 | } | |
e6d9da1d | 1837 | |
e6afa0de | 1838 | video->device = device; |
1da177e4 LT |
1839 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1840 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1841 | device->driver_data = video; |
1da177e4 LT |
1842 | |
1843 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1844 | error = acpi_video_bus_check(video); |
1845 | if (error) | |
1846 | goto err_free_video; | |
1da177e4 | 1847 | |
bbac81f5 | 1848 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1849 | INIT_LIST_HEAD(&video->video_device_list); |
1850 | ||
ea9f8856 IM |
1851 | error = acpi_video_bus_get_devices(video, device); |
1852 | if (error) | |
91e13aa3 | 1853 | goto err_put_video; |
1da177e4 | 1854 | |
1da177e4 | 1855 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1856 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1857 | video->flags.multihead ? "yes" : "no", | |
1858 | video->flags.rom ? "yes" : "no", | |
1859 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1860 | mutex_lock(&video_list_lock); |
1861 | list_add_tail(&video->entry, &video_bus_head); | |
1862 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1863 | |
67b662e1 AL |
1864 | acpi_video_bus_register_backlight(video); |
1865 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1866 | |
f51e8391 DT |
1867 | return 0; |
1868 | ||
67b662e1 | 1869 | err_put_video: |
f51e8391 DT |
1870 | acpi_video_bus_put_devices(video); |
1871 | kfree(video->attached_array); | |
67b662e1 | 1872 | err_free_video: |
f51e8391 | 1873 | kfree(video); |
db89b4f0 | 1874 | device->driver_data = NULL; |
1da177e4 | 1875 | |
f51e8391 | 1876 | return error; |
1da177e4 LT |
1877 | } |
1878 | ||
51fac838 | 1879 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1880 | { |
4be44fcd | 1881 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1882 | |
1da177e4 LT |
1883 | |
1884 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1885 | return -EINVAL; |
1da177e4 | 1886 | |
50dd0969 | 1887 | video = acpi_driver_data(device); |
1da177e4 | 1888 | |
67b662e1 AL |
1889 | acpi_video_bus_remove_notify_handler(video); |
1890 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1891 | acpi_video_bus_put_devices(video); |
1da177e4 | 1892 | |
67b662e1 AL |
1893 | mutex_lock(&video_list_lock); |
1894 | list_del(&video->entry); | |
1895 | mutex_unlock(&video_list_lock); | |
1896 | ||
6044ec88 | 1897 | kfree(video->attached_array); |
1da177e4 LT |
1898 | kfree(video); |
1899 | ||
d550d98d | 1900 | return 0; |
1da177e4 LT |
1901 | } |
1902 | ||
c6996bdd AC |
1903 | static int __init is_i740(struct pci_dev *dev) |
1904 | { | |
1905 | if (dev->device == 0x00D1) | |
1906 | return 1; | |
1907 | if (dev->device == 0x7000) | |
1908 | return 1; | |
1909 | return 0; | |
1910 | } | |
1911 | ||
74a365b3 MG |
1912 | static int __init intel_opregion_present(void) |
1913 | { | |
c6996bdd | 1914 | int opregion = 0; |
74a365b3 MG |
1915 | struct pci_dev *dev = NULL; |
1916 | u32 address; | |
1917 | ||
1918 | for_each_pci_dev(dev) { | |
1919 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1920 | continue; | |
1921 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1922 | continue; | |
c6996bdd AC |
1923 | /* We don't want to poke around undefined i740 registers */ |
1924 | if (is_i740(dev)) | |
1925 | continue; | |
74a365b3 MG |
1926 | pci_read_config_dword(dev, 0xfc, &address); |
1927 | if (!address) | |
1928 | continue; | |
c6996bdd | 1929 | opregion = 1; |
74a365b3 | 1930 | } |
c6996bdd | 1931 | return opregion; |
74a365b3 MG |
1932 | } |
1933 | ||
8e5c2b77 | 1934 | int acpi_video_register(void) |
1da177e4 | 1935 | { |
8e5c2b77 | 1936 | int result = 0; |
86e437f0 ZY |
1937 | if (register_count) { |
1938 | /* | |
8e5c2b77 RW |
1939 | * if the function of acpi_video_register is already called, |
1940 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
1941 | */ |
1942 | return 0; | |
1943 | } | |
1da177e4 | 1944 | |
67b662e1 AL |
1945 | mutex_init(&video_list_lock); |
1946 | INIT_LIST_HEAD(&video_bus_head); | |
1947 | ||
1da177e4 | 1948 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1949 | if (result < 0) |
d550d98d | 1950 | return -ENODEV; |
1da177e4 | 1951 | |
86e437f0 ZY |
1952 | /* |
1953 | * When the acpi_video_bus is loaded successfully, increase | |
1954 | * the counter reference. | |
1955 | */ | |
1956 | register_count = 1; | |
1957 | ||
d550d98d | 1958 | return 0; |
1da177e4 | 1959 | } |
8e5c2b77 | 1960 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 1961 | |
86e437f0 ZY |
1962 | void acpi_video_unregister(void) |
1963 | { | |
1964 | if (!register_count) { | |
1965 | /* | |
1966 | * If the acpi video bus is already unloaded, don't | |
1967 | * unload it again and return directly. | |
1968 | */ | |
1969 | return; | |
1970 | } | |
1971 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1972 | ||
86e437f0 ZY |
1973 | register_count = 0; |
1974 | ||
1975 | return; | |
1976 | } | |
1977 | EXPORT_SYMBOL(acpi_video_unregister); | |
1978 | ||
74a365b3 MG |
1979 | /* |
1980 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1981 | * the video opregion code to be run first in order to initialise | |
1982 | * state before any ACPI video calls are made. To handle this we defer | |
1983 | * registration of the video class until the opregion code has run. | |
1984 | */ | |
1985 | ||
1986 | static int __init acpi_video_init(void) | |
1987 | { | |
45cb50e6 ZR |
1988 | dmi_check_system(video_dmi_table); |
1989 | ||
74a365b3 MG |
1990 | if (intel_opregion_present()) |
1991 | return 0; | |
1992 | ||
1993 | return acpi_video_register(); | |
1994 | } | |
1da177e4 | 1995 | |
86e437f0 | 1996 | static void __exit acpi_video_exit(void) |
1da177e4 | 1997 | { |
86e437f0 | 1998 | acpi_video_unregister(); |
1da177e4 | 1999 | |
d550d98d | 2000 | return; |
1da177e4 LT |
2001 | } |
2002 | ||
2003 | module_init(acpi_video_init); | |
2004 | module_exit(acpi_video_exit); |