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 | }, | |
e37f14a5 KT |
507 | { |
508 | .callback = video_ignore_initial_backlight, | |
509 | .ident = "HP 250 G1", | |
510 | .matches = { | |
511 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
512 | DMI_MATCH(DMI_PRODUCT_NAME, "HP 250 G1 Notebook PC"), | |
513 | }, | |
514 | }, | |
45cb50e6 ZR |
515 | {} |
516 | }; | |
517 | ||
994fa63c DB |
518 | static unsigned long long |
519 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
520 | unsigned long long bqc_value) | |
521 | { | |
522 | unsigned long long level; | |
523 | ||
524 | if (device->brightness->flags._BQC_use_index) { | |
525 | /* | |
526 | * _BQC returns an index that doesn't account for | |
527 | * the first 2 items with special meaning, so we need | |
528 | * to compensate for that by offsetting ourselves | |
529 | */ | |
530 | if (device->brightness->flags._BCL_reversed) | |
531 | bqc_value = device->brightness->count - 3 - bqc_value; | |
532 | ||
533 | level = device->brightness->levels[bqc_value + 2]; | |
534 | } else { | |
535 | level = bqc_value; | |
536 | } | |
537 | ||
538 | level += bqc_offset_aml_bug_workaround; | |
539 | ||
540 | return level; | |
541 | } | |
542 | ||
1da177e4 | 543 | static int |
4be44fcd | 544 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 545 | unsigned long long *level, bool raw) |
1da177e4 | 546 | { |
c8890f90 | 547 | acpi_status status = AE_OK; |
4e231fa4 | 548 | int i; |
c8890f90 | 549 | |
c60d638e ZR |
550 | if (device->cap._BQC || device->cap._BCQ) { |
551 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
552 | ||
553 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
554 | NULL, level); |
555 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
556 | if (raw) { |
557 | /* | |
558 | * Caller has indicated he wants the raw | |
559 | * value returned by _BQC, so don't furtherly | |
560 | * mess with the value. | |
561 | */ | |
562 | return 0; | |
563 | } | |
564 | ||
994fa63c | 565 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 566 | |
4e231fa4 VS |
567 | for (i = 2; i < device->brightness->count; i++) |
568 | if (device->brightness->levels[i] == *level) { | |
569 | device->brightness->curr = *level; | |
570 | return 0; | |
915ea7e4 | 571 | } |
a89803df DB |
572 | /* |
573 | * BQC returned an invalid level. | |
574 | * Stop using it. | |
575 | */ | |
576 | ACPI_WARNING((AE_INFO, | |
577 | "%s returned an invalid level", | |
578 | buf)); | |
579 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 580 | } else { |
21fcb34e FC |
581 | /* |
582 | * Fixme: | |
c8890f90 ZR |
583 | * should we return an error or ignore this failure? |
584 | * dev->brightness->curr is a cached value which stores | |
585 | * the correct current backlight level in most cases. | |
586 | * ACPI video backlight still works w/ buggy _BQC. | |
587 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
588 | */ | |
c60d638e ZR |
589 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
590 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
591 | } |
592 | } | |
593 | ||
4500ca8e | 594 | *level = device->brightness->curr; |
c8890f90 | 595 | return 0; |
1da177e4 LT |
596 | } |
597 | ||
598 | static int | |
4be44fcd LB |
599 | acpi_video_device_EDID(struct acpi_video_device *device, |
600 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 601 | { |
4be44fcd LB |
602 | int status; |
603 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
604 | union acpi_object *obj; | |
605 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
606 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 607 | |
1da177e4 LT |
608 | |
609 | *edid = NULL; | |
610 | ||
611 | if (!device) | |
d550d98d | 612 | return -ENODEV; |
1da177e4 LT |
613 | if (length == 128) |
614 | arg0.integer.value = 1; | |
615 | else if (length == 256) | |
616 | arg0.integer.value = 2; | |
617 | else | |
d550d98d | 618 | return -EINVAL; |
1da177e4 | 619 | |
90130268 | 620 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 621 | if (ACPI_FAILURE(status)) |
d550d98d | 622 | return -ENODEV; |
1da177e4 | 623 | |
50dd0969 | 624 | obj = buffer.pointer; |
1da177e4 LT |
625 | |
626 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
627 | *edid = obj; | |
628 | else { | |
6468463a | 629 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
630 | status = -EFAULT; |
631 | kfree(obj); | |
632 | } | |
633 | ||
d550d98d | 634 | return status; |
1da177e4 LT |
635 | } |
636 | ||
1da177e4 LT |
637 | /* bus */ |
638 | ||
1da177e4 LT |
639 | /* |
640 | * Arg: | |
21fcb34e FC |
641 | * video : video bus device pointer |
642 | * bios_flag : | |
1da177e4 LT |
643 | * 0. The system BIOS should NOT automatically switch(toggle) |
644 | * the active display output. | |
645 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 646 | * active display output. No switch event. |
1da177e4 LT |
647 | * 2. The _DGS value should be locked. |
648 | * 3. The system BIOS should not automatically switch (toggle) the | |
649 | * active display output, but instead generate the display switch | |
650 | * event notify code. | |
651 | * lcd_flag : | |
652 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 653 | * of the LCD when the power changes from AC to DC |
21fcb34e | 654 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 655 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 656 | * Return Value: |
ea9f8856 | 657 | * -EINVAL wrong arg. |
1da177e4 LT |
658 | */ |
659 | ||
660 | static int | |
4be44fcd | 661 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 662 | { |
ea9f8856 | 663 | acpi_status status; |
1da177e4 | 664 | |
b0373843 ZR |
665 | if (!video->cap._DOS) |
666 | return 0; | |
1da177e4 | 667 | |
ea9f8856 IM |
668 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
669 | return -EINVAL; | |
0db98202 JL |
670 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
671 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
672 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
673 | if (ACPI_FAILURE(status)) |
674 | return -EIO; | |
1da177e4 | 675 | |
ea9f8856 | 676 | return 0; |
1da177e4 LT |
677 | } |
678 | ||
935e5f29 ZR |
679 | /* |
680 | * Simple comparison function used to sort backlight levels. | |
681 | */ | |
682 | ||
683 | static int | |
684 | acpi_video_cmp_level(const void *a, const void *b) | |
685 | { | |
686 | return *(int *)a - *(int *)b; | |
687 | } | |
688 | ||
a50188da AL |
689 | /* |
690 | * Decides if _BQC/_BCQ for this system is usable | |
691 | * | |
692 | * We do this by changing the level first and then read out the current | |
693 | * brightness level, if the value does not match, find out if it is using | |
694 | * index. If not, clear the _BQC/_BCQ capability. | |
695 | */ | |
696 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
697 | int max_level, int current_level) | |
698 | { | |
699 | struct acpi_video_device_brightness *br = device->brightness; | |
700 | int result; | |
701 | unsigned long long level; | |
702 | int test_level; | |
703 | ||
704 | /* don't mess with existing known broken systems */ | |
705 | if (bqc_offset_aml_bug_workaround) | |
706 | return 0; | |
707 | ||
708 | /* | |
709 | * Some systems always report current brightness level as maximum | |
710 | * through _BQC, we need to test another value for them. | |
711 | */ | |
b3b301c5 | 712 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
713 | |
714 | result = acpi_video_device_lcd_set_level(device, test_level); | |
715 | if (result) | |
716 | return result; | |
717 | ||
718 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
719 | if (result) | |
720 | return result; | |
721 | ||
722 | if (level != test_level) { | |
723 | /* buggy _BQC found, need to find out if it uses index */ | |
724 | if (level < br->count) { | |
725 | if (br->flags._BCL_reversed) | |
726 | level = br->count - 3 - level; | |
727 | if (br->levels[level + 2] == test_level) | |
728 | br->flags._BQC_use_index = 1; | |
729 | } | |
730 | ||
731 | if (!br->flags._BQC_use_index) | |
732 | device->cap._BQC = device->cap._BCQ = 0; | |
733 | } | |
734 | ||
735 | return 0; | |
736 | } | |
737 | ||
738 | ||
1da177e4 | 739 | /* |
21fcb34e FC |
740 | * Arg: |
741 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
742 | * |
743 | * Return Value: | |
469778c1 JJ |
744 | * Maximum brightness level |
745 | * | |
746 | * Allocate and initialize device->brightness. | |
747 | */ | |
748 | ||
749 | static int | |
750 | acpi_video_init_brightness(struct acpi_video_device *device) | |
751 | { | |
752 | union acpi_object *obj = NULL; | |
d32f6947 | 753 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 754 | unsigned long long level, level_old; |
469778c1 JJ |
755 | union acpi_object *o; |
756 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 757 | int result = -EINVAL; |
469778c1 JJ |
758 | |
759 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
760 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
761 | "LCD brightness level\n")); | |
762 | goto out; | |
763 | } | |
764 | ||
765 | if (obj->package.count < 2) | |
766 | goto out; | |
767 | ||
768 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
769 | if (!br) { | |
770 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 771 | result = -ENOMEM; |
469778c1 JJ |
772 | goto out; |
773 | } | |
774 | ||
d32f6947 | 775 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 776 | GFP_KERNEL); |
1a7c618a ZR |
777 | if (!br->levels) { |
778 | result = -ENOMEM; | |
469778c1 | 779 | goto out_free; |
1a7c618a | 780 | } |
469778c1 JJ |
781 | |
782 | for (i = 0; i < obj->package.count; i++) { | |
783 | o = (union acpi_object *)&obj->package.elements[i]; | |
784 | if (o->type != ACPI_TYPE_INTEGER) { | |
785 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
786 | continue; | |
787 | } | |
788 | br->levels[count] = (u32) o->integer.value; | |
789 | ||
790 | if (br->levels[count] > max_level) | |
791 | max_level = br->levels[count]; | |
792 | count++; | |
793 | } | |
794 | ||
d32f6947 ZR |
795 | /* |
796 | * some buggy BIOS don't export the levels | |
797 | * when machine is on AC/Battery in _BCL package. | |
798 | * In this case, the first two elements in _BCL packages | |
799 | * are also supported brightness levels that OS should take care of. | |
800 | */ | |
90af2cf6 ZR |
801 | for (i = 2; i < count; i++) { |
802 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 803 | level_ac_battery++; |
90af2cf6 ZR |
804 | if (br->levels[i] == br->levels[1]) |
805 | level_ac_battery++; | |
806 | } | |
d32f6947 ZR |
807 | |
808 | if (level_ac_battery < 2) { | |
809 | level_ac_battery = 2 - level_ac_battery; | |
810 | br->flags._BCL_no_ac_battery_levels = 1; | |
811 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
812 | br->levels[i] = br->levels[i - level_ac_battery]; | |
813 | count += level_ac_battery; | |
814 | } else if (level_ac_battery > 2) | |
bf6787eb | 815 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 816 | |
d80fb99f ZR |
817 | /* Check if the _BCL package is in a reversed order */ |
818 | if (max_level == br->levels[2]) { | |
819 | br->flags._BCL_reversed = 1; | |
820 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
821 | acpi_video_cmp_level, NULL); | |
822 | } else if (max_level != br->levels[count - 1]) | |
823 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 824 | "Found unordered _BCL package")); |
469778c1 JJ |
825 | |
826 | br->count = count; | |
827 | device->brightness = br; | |
1a7c618a | 828 | |
1a7c618a | 829 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 830 | br->curr = level = max_level; |
e047cca6 ZR |
831 | |
832 | if (!device->cap._BQC) | |
833 | goto set_level; | |
834 | ||
a89803df DB |
835 | result = acpi_video_device_lcd_get_level_current(device, |
836 | &level_old, true); | |
1a7c618a ZR |
837 | if (result) |
838 | goto out_free_levels; | |
839 | ||
a50188da | 840 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
841 | if (result) |
842 | goto out_free_levels; | |
a50188da AL |
843 | /* |
844 | * cap._BQC may get cleared due to _BQC is found to be broken | |
845 | * in acpi_video_bqc_quirk, so check again here. | |
846 | */ | |
847 | if (!device->cap._BQC) | |
848 | goto set_level; | |
e047cca6 | 849 | |
994fa63c DB |
850 | if (use_bios_initial_backlight) { |
851 | level = acpi_video_bqc_value_to_level(device, level_old); | |
90c53ca4 | 852 | /* |
994fa63c DB |
853 | * On some buggy laptops, _BQC returns an uninitialized |
854 | * value when invoked for the first time, i.e. | |
855 | * level_old is invalid (no matter whether it's a level | |
856 | * or an index). Set the backlight to max_level in this case. | |
90c53ca4 | 857 | */ |
994fa63c | 858 | for (i = 2; i < br->count; i++) |
9efa5e50 | 859 | if (level == br->levels[i]) |
994fa63c | 860 | break; |
2c62333a | 861 | if (i == br->count || !level) |
994fa63c | 862 | level = max_level; |
90c53ca4 | 863 | } |
e047cca6 | 864 | |
e047cca6 | 865 | set_level: |
90c53ca4 | 866 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
867 | if (result) |
868 | goto out_free_levels; | |
1a7c618a | 869 | |
d32f6947 ZR |
870 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
871 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 872 | kfree(obj); |
1a7c618a | 873 | return result; |
469778c1 JJ |
874 | |
875 | out_free_levels: | |
876 | kfree(br->levels); | |
877 | out_free: | |
878 | kfree(br); | |
879 | out: | |
880 | device->brightness = NULL; | |
881 | kfree(obj); | |
1a7c618a | 882 | return result; |
469778c1 JJ |
883 | } |
884 | ||
885 | /* | |
886 | * Arg: | |
887 | * device : video output device (LCD, CRT, ..) | |
888 | * | |
889 | * Return Value: | |
21fcb34e | 890 | * None |
1da177e4 | 891 | * |
98fb8fe1 | 892 | * Find out all required AML methods defined under the output |
1da177e4 LT |
893 | * device. |
894 | */ | |
895 | ||
4be44fcd | 896 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 897 | { |
952c63e9 | 898 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 899 | device->cap._ADR = 1; |
952c63e9 | 900 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 901 | device->cap._BCL = 1; |
952c63e9 | 902 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 903 | device->cap._BCM = 1; |
952c63e9 | 904 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 905 | device->cap._BQC = 1; |
952c63e9 | 906 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
907 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
908 | device->cap._BCQ = 1; | |
909 | } | |
910 | ||
952c63e9 | 911 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 912 | device->cap._DDC = 1; |
1da177e4 LT |
913 | } |
914 | ||
915 | /* | |
21fcb34e FC |
916 | * Arg: |
917 | * device : video output device (VGA) | |
1da177e4 LT |
918 | * |
919 | * Return Value: | |
21fcb34e | 920 | * None |
1da177e4 | 921 | * |
98fb8fe1 | 922 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
923 | */ |
924 | ||
4be44fcd | 925 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 926 | { |
952c63e9 | 927 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 928 | video->cap._DOS = 1; |
952c63e9 | 929 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 930 | video->cap._DOD = 1; |
952c63e9 | 931 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 932 | video->cap._ROM = 1; |
952c63e9 | 933 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 934 | video->cap._GPD = 1; |
952c63e9 | 935 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 936 | video->cap._SPD = 1; |
952c63e9 | 937 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 938 | video->cap._VPO = 1; |
1da177e4 LT |
939 | } |
940 | ||
941 | /* | |
942 | * Check whether the video bus device has required AML method to | |
943 | * support the desired features | |
944 | */ | |
945 | ||
4be44fcd | 946 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 947 | { |
4be44fcd | 948 | acpi_status status = -ENOENT; |
1e4cffe7 | 949 | struct pci_dev *dev; |
1da177e4 LT |
950 | |
951 | if (!video) | |
d550d98d | 952 | return -EINVAL; |
1da177e4 | 953 | |
1e4cffe7 | 954 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
955 | if (!dev) |
956 | return -ENODEV; | |
1e4cffe7 | 957 | pci_dev_put(dev); |
22c13f9d | 958 | |
21fcb34e FC |
959 | /* |
960 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
961 | * to check well known required nodes. |
962 | */ | |
963 | ||
98fb8fe1 | 964 | /* Does this device support video switching? */ |
3a1151e3 SB |
965 | if (video->cap._DOS || video->cap._DOD) { |
966 | if (!video->cap._DOS) { | |
967 | printk(KERN_WARNING FW_BUG | |
968 | "ACPI(%s) defines _DOD but not _DOS\n", | |
969 | acpi_device_bid(video->device)); | |
970 | } | |
1da177e4 LT |
971 | video->flags.multihead = 1; |
972 | status = 0; | |
973 | } | |
974 | ||
98fb8fe1 | 975 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 976 | if (video->cap._ROM) { |
1da177e4 LT |
977 | video->flags.rom = 1; |
978 | status = 0; | |
979 | } | |
980 | ||
98fb8fe1 | 981 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 982 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
983 | video->flags.post = 1; |
984 | status = 0; | |
985 | } | |
986 | ||
d550d98d | 987 | return status; |
1da177e4 LT |
988 | } |
989 | ||
21fcb34e FC |
990 | /* |
991 | * -------------------------------------------------------------------------- | |
992 | * Driver Interface | |
993 | * -------------------------------------------------------------------------- | |
994 | */ | |
1da177e4 LT |
995 | |
996 | /* device interface */ | |
915ea7e4 | 997 | static struct acpi_video_device_attrib * |
82cae999 RZ |
998 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
999 | { | |
78eed028 DT |
1000 | struct acpi_video_enumerated_device *ids; |
1001 | int i; | |
1002 | ||
1003 | for (i = 0; i < video->attached_count; i++) { | |
1004 | ids = &video->attached_array[i]; | |
1005 | if ((ids->value.int_val & 0xffff) == device_id) | |
1006 | return &ids->value.attrib; | |
1007 | } | |
82cae999 | 1008 | |
82cae999 RZ |
1009 | return NULL; |
1010 | } | |
1da177e4 | 1011 | |
e92a7162 MG |
1012 | static int |
1013 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1014 | unsigned long device_id) | |
1015 | { | |
1016 | struct acpi_video_enumerated_device *ids; | |
1017 | int i; | |
1018 | ||
1019 | for (i = 0; i < video->attached_count; i++) { | |
1020 | ids = &video->attached_array[i]; | |
1021 | if ((ids->value.int_val & 0xffff) == device_id) | |
1022 | return ids->value.int_val; | |
1023 | } | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
1da177e4 | 1028 | static int |
4be44fcd LB |
1029 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1030 | struct acpi_video_bus *video) | |
1da177e4 | 1031 | { |
27663c58 | 1032 | unsigned long long device_id; |
e92a7162 | 1033 | int status, device_type; |
4be44fcd | 1034 | struct acpi_video_device *data; |
915ea7e4 | 1035 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1036 | |
4be44fcd LB |
1037 | status = |
1038 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1039 | /* Some device omits _ADR, we skip them instead of fail */ |
1040 | if (ACPI_FAILURE(status)) | |
1041 | return 0; | |
1da177e4 | 1042 | |
91e13aa3 AL |
1043 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1044 | if (!data) | |
1045 | return -ENOMEM; | |
82cae999 | 1046 | |
91e13aa3 AL |
1047 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1048 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1049 | device->driver_data = data; | |
1050 | ||
1051 | data->device_id = device_id; | |
1052 | data->video = video; | |
1053 | data->dev = device; | |
1054 | ||
1055 | attribute = acpi_video_get_device_attr(video, device_id); | |
1056 | ||
915ea7e4 | 1057 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1058 | switch (attribute->display_type) { |
1059 | case ACPI_VIDEO_DISPLAY_CRT: | |
1060 | data->flags.crt = 1; | |
1061 | break; | |
1062 | case ACPI_VIDEO_DISPLAY_TV: | |
1063 | data->flags.tvout = 1; | |
1064 | break; | |
1065 | case ACPI_VIDEO_DISPLAY_DVI: | |
1066 | data->flags.dvi = 1; | |
1067 | break; | |
1068 | case ACPI_VIDEO_DISPLAY_LCD: | |
1069 | data->flags.lcd = 1; | |
1070 | break; | |
1071 | default: | |
1072 | data->flags.unknown = 1; | |
1073 | break; | |
1074 | } | |
915ea7e4 | 1075 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1076 | data->flags.bios = 1; |
1077 | } else { | |
1078 | /* Check for legacy IDs */ | |
1079 | device_type = acpi_video_get_device_type(video, device_id); | |
1080 | /* Ignore bits 16 and 18-20 */ | |
1081 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1082 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1083 | data->flags.crt = 1; | |
1084 | break; | |
1085 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1086 | data->flags.lcd = 1; | |
1087 | break; | |
1088 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1089 | data->flags.tvout = 1; | |
1090 | break; | |
1091 | default: | |
1092 | data->flags.unknown = 1; | |
e92a7162 | 1093 | } |
91e13aa3 | 1094 | } |
4be44fcd | 1095 | |
91e13aa3 AL |
1096 | acpi_video_device_bind(video, data); |
1097 | acpi_video_device_find_cap(data); | |
1da177e4 | 1098 | |
91e13aa3 AL |
1099 | mutex_lock(&video->device_list_lock); |
1100 | list_add_tail(&data->entry, &video->video_device_list); | |
1101 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1102 | |
91e13aa3 | 1103 | return status; |
1da177e4 LT |
1104 | } |
1105 | ||
1106 | /* | |
1107 | * Arg: | |
21fcb34e | 1108 | * video : video bus device |
1da177e4 LT |
1109 | * |
1110 | * Return: | |
21fcb34e FC |
1111 | * none |
1112 | * | |
1113 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1114 | * bind the ids with the corresponding video devices |
1115 | * under the video bus. | |
4be44fcd | 1116 | */ |
1da177e4 | 1117 | |
4be44fcd | 1118 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1119 | { |
ff102ea9 DT |
1120 | struct acpi_video_device *dev; |
1121 | ||
bbac81f5 | 1122 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1123 | |
1124 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1125 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1126 | |
bbac81f5 | 1127 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1128 | } |
1129 | ||
1130 | /* | |
1131 | * Arg: | |
21fcb34e FC |
1132 | * video : video bus device |
1133 | * device : video output device under the video | |
1134 | * bus | |
1da177e4 LT |
1135 | * |
1136 | * Return: | |
21fcb34e FC |
1137 | * none |
1138 | * | |
1da177e4 LT |
1139 | * Bind the ids with the corresponding video devices |
1140 | * under the video bus. | |
4be44fcd | 1141 | */ |
1da177e4 LT |
1142 | |
1143 | static void | |
4be44fcd LB |
1144 | acpi_video_device_bind(struct acpi_video_bus *video, |
1145 | struct acpi_video_device *device) | |
1da177e4 | 1146 | { |
78eed028 | 1147 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1148 | int i; |
1da177e4 | 1149 | |
78eed028 DT |
1150 | for (i = 0; i < video->attached_count; i++) { |
1151 | ids = &video->attached_array[i]; | |
1152 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1153 | ids->bind_info = device; | |
1da177e4 LT |
1154 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1155 | } | |
1156 | } | |
1da177e4 LT |
1157 | } |
1158 | ||
1159 | /* | |
1160 | * Arg: | |
21fcb34e | 1161 | * video : video bus device |
1da177e4 LT |
1162 | * |
1163 | * Return: | |
21fcb34e FC |
1164 | * < 0 : error |
1165 | * | |
1da177e4 LT |
1166 | * Call _DOD to enumerate all devices attached to display adapter |
1167 | * | |
4be44fcd | 1168 | */ |
1da177e4 LT |
1169 | |
1170 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1171 | { | |
4be44fcd LB |
1172 | int status; |
1173 | int count; | |
1174 | int i; | |
78eed028 | 1175 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1176 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1177 | union acpi_object *dod = NULL; | |
1178 | union acpi_object *obj; | |
1da177e4 | 1179 | |
90130268 | 1180 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1181 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1182 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1183 | return status; |
1da177e4 LT |
1184 | } |
1185 | ||
50dd0969 | 1186 | dod = buffer.pointer; |
1da177e4 | 1187 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1188 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1189 | status = -EFAULT; |
1190 | goto out; | |
1191 | } | |
1192 | ||
1193 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1194 | dod->package.count)); |
1da177e4 | 1195 | |
78eed028 DT |
1196 | active_list = kcalloc(1 + dod->package.count, |
1197 | sizeof(struct acpi_video_enumerated_device), | |
1198 | GFP_KERNEL); | |
1199 | if (!active_list) { | |
1da177e4 LT |
1200 | status = -ENOMEM; |
1201 | goto out; | |
1202 | } | |
1203 | ||
1204 | count = 0; | |
1205 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1206 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1207 | |
1208 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1209 | printk(KERN_ERR PREFIX |
1210 | "Invalid _DOD data in element %d\n", i); | |
1211 | continue; | |
1da177e4 | 1212 | } |
78eed028 DT |
1213 | |
1214 | active_list[count].value.int_val = obj->integer.value; | |
1215 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1216 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1217 | (int)obj->integer.value)); | |
1da177e4 LT |
1218 | count++; |
1219 | } | |
1da177e4 | 1220 | |
6044ec88 | 1221 | kfree(video->attached_array); |
4be44fcd | 1222 | |
78eed028 | 1223 | video->attached_array = active_list; |
1da177e4 | 1224 | video->attached_count = count; |
78eed028 | 1225 | |
915ea7e4 | 1226 | out: |
02438d87 | 1227 | kfree(buffer.pointer); |
d550d98d | 1228 | return status; |
1da177e4 LT |
1229 | } |
1230 | ||
4be44fcd LB |
1231 | static int |
1232 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1233 | u32 level_current, u32 event) | |
1da177e4 | 1234 | { |
63f0edfc | 1235 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1236 | max = max_below = 0; |
1237 | min = min_above = 255; | |
63f0edfc | 1238 | /* Find closest level to level_current */ |
0a3db1ce | 1239 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1240 | l = device->brightness->levels[i]; |
1241 | if (abs(l - level_current) < abs(delta)) { | |
1242 | delta = l - level_current; | |
1243 | if (!delta) | |
1244 | break; | |
1245 | } | |
1246 | } | |
1247 | /* Ajust level_current to closest available level */ | |
1248 | level_current += delta; | |
0a3db1ce | 1249 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1250 | l = device->brightness->levels[i]; |
1251 | if (l < min) | |
1252 | min = l; | |
1253 | if (l > max) | |
1254 | max = l; | |
1255 | if (l < min_above && l > level_current) | |
1256 | min_above = l; | |
1257 | if (l > max_below && l < level_current) | |
1258 | max_below = l; | |
1259 | } | |
1260 | ||
1261 | switch (event) { | |
1262 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1263 | return (level_current < max) ? min_above : min; | |
1264 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1265 | return (level_current < max) ? min_above : max; | |
1266 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1267 | return (level_current > min) ? max_below : min; | |
1268 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1269 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1270 | return 0; | |
1271 | default: | |
1272 | return level_current; | |
1273 | } | |
1da177e4 LT |
1274 | } |
1275 | ||
c8890f90 | 1276 | static int |
4be44fcd | 1277 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1278 | { |
27663c58 | 1279 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1280 | int result = -EINVAL; |
1281 | ||
fbc9fe1b AL |
1282 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1283 | if (!acpi_video_verify_backlight_support()) | |
28c32e99 ZR |
1284 | return 0; |
1285 | ||
469778c1 | 1286 | if (!device->brightness) |
c8890f90 ZR |
1287 | goto out; |
1288 | ||
1289 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1290 | &level_current, |
1291 | false); | |
c8890f90 ZR |
1292 | if (result) |
1293 | goto out; | |
1294 | ||
1da177e4 | 1295 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1296 | |
24450c7a | 1297 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1298 | |
36342742 MG |
1299 | if (!result) |
1300 | backlight_force_update(device->backlight, | |
1301 | BACKLIGHT_UPDATE_HOTKEY); | |
1302 | ||
c8890f90 ZR |
1303 | out: |
1304 | if (result) | |
1305 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1306 | ||
1307 | return result; | |
1da177e4 LT |
1308 | } |
1309 | ||
e92a7162 MG |
1310 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1311 | void **edid) | |
1312 | { | |
1313 | struct acpi_video_bus *video; | |
1314 | struct acpi_video_device *video_device; | |
1315 | union acpi_object *buffer = NULL; | |
1316 | acpi_status status; | |
1317 | int i, length; | |
1318 | ||
1319 | if (!device || !acpi_driver_data(device)) | |
1320 | return -EINVAL; | |
1321 | ||
1322 | video = acpi_driver_data(device); | |
1323 | ||
1324 | for (i = 0; i < video->attached_count; i++) { | |
1325 | video_device = video->attached_array[i].bind_info; | |
1326 | length = 256; | |
1327 | ||
1328 | if (!video_device) | |
1329 | continue; | |
1330 | ||
82069552 ZR |
1331 | if (!video_device->cap._DDC) |
1332 | continue; | |
1333 | ||
e92a7162 MG |
1334 | if (type) { |
1335 | switch (type) { | |
1336 | case ACPI_VIDEO_DISPLAY_CRT: | |
1337 | if (!video_device->flags.crt) | |
1338 | continue; | |
1339 | break; | |
1340 | case ACPI_VIDEO_DISPLAY_TV: | |
1341 | if (!video_device->flags.tvout) | |
1342 | continue; | |
1343 | break; | |
1344 | case ACPI_VIDEO_DISPLAY_DVI: | |
1345 | if (!video_device->flags.dvi) | |
1346 | continue; | |
1347 | break; | |
1348 | case ACPI_VIDEO_DISPLAY_LCD: | |
1349 | if (!video_device->flags.lcd) | |
1350 | continue; | |
1351 | break; | |
1352 | } | |
1353 | } else if (video_device->device_id != device_id) { | |
1354 | continue; | |
1355 | } | |
1356 | ||
1357 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1358 | ||
1359 | if (ACPI_FAILURE(status) || !buffer || | |
1360 | buffer->type != ACPI_TYPE_BUFFER) { | |
1361 | length = 128; | |
1362 | status = acpi_video_device_EDID(video_device, &buffer, | |
1363 | length); | |
1364 | if (ACPI_FAILURE(status) || !buffer || | |
1365 | buffer->type != ACPI_TYPE_BUFFER) { | |
1366 | continue; | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | *edid = buffer->buffer.pointer; | |
1371 | return length; | |
1372 | } | |
1373 | ||
1374 | return -ENODEV; | |
1375 | } | |
1376 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1377 | ||
1da177e4 | 1378 | static int |
4be44fcd LB |
1379 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1380 | struct acpi_device *device) | |
1da177e4 | 1381 | { |
fba4e087 | 1382 | int status = 0; |
ff102ea9 | 1383 | struct acpi_device *dev; |
1da177e4 | 1384 | |
fba4e087 IM |
1385 | /* |
1386 | * There are systems where video module known to work fine regardless | |
1387 | * of broken _DOD and ignoring returned value here doesn't cause | |
1388 | * any issues later. | |
1389 | */ | |
1390 | acpi_video_device_enumerate(video); | |
1da177e4 | 1391 | |
ff102ea9 | 1392 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1393 | |
1394 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1395 | if (status) { |
91e13aa3 AL |
1396 | dev_err(&dev->dev, "Can't attach device\n"); |
1397 | break; | |
1da177e4 | 1398 | } |
1da177e4 | 1399 | } |
d550d98d | 1400 | return status; |
1da177e4 LT |
1401 | } |
1402 | ||
1da177e4 LT |
1403 | /* acpi_video interface */ |
1404 | ||
efaa14c7 AL |
1405 | /* |
1406 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1407 | * preform any automatic brightness change on receiving a notification. | |
1408 | */ | |
4be44fcd | 1409 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1410 | { |
efaa14c7 | 1411 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1412 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1413 | } |
1414 | ||
4be44fcd | 1415 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1416 | { |
efaa14c7 | 1417 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1418 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1419 | } |
1420 | ||
7015558f | 1421 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1422 | { |
7015558f | 1423 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1424 | struct input_dev *input; |
17c452f9 | 1425 | int keycode = 0; |
e9dab196 | 1426 | |
67b662e1 | 1427 | if (!video || !video->input) |
d550d98d | 1428 | return; |
1da177e4 | 1429 | |
e9dab196 | 1430 | input = video->input; |
1da177e4 LT |
1431 | |
1432 | switch (event) { | |
98fb8fe1 | 1433 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1434 | * most likely via hotkey. */ |
8a37c65d | 1435 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1436 | break; |
1437 | ||
98fb8fe1 | 1438 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1439 | * connector. */ |
1440 | acpi_video_device_enumerate(video); | |
1441 | acpi_video_device_rebind(video); | |
e9dab196 | 1442 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1443 | break; |
1444 | ||
4be44fcd | 1445 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1446 | keycode = KEY_SWITCHVIDEOMODE; |
1447 | break; | |
4be44fcd | 1448 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1449 | keycode = KEY_VIDEO_NEXT; |
1450 | break; | |
4be44fcd | 1451 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1452 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1453 | break; |
1454 | ||
1455 | default: | |
1456 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1457 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1458 | break; |
1459 | } | |
1460 | ||
8a37c65d LT |
1461 | if (acpi_notifier_call_chain(device, event, 0)) |
1462 | /* Something vetoed the keypress. */ | |
1463 | keycode = 0; | |
17c452f9 MG |
1464 | |
1465 | if (keycode) { | |
1466 | input_report_key(input, keycode, 1); | |
1467 | input_sync(input); | |
1468 | input_report_key(input, keycode, 0); | |
1469 | input_sync(input); | |
1470 | } | |
e9dab196 | 1471 | |
d550d98d | 1472 | return; |
1da177e4 LT |
1473 | } |
1474 | ||
4be44fcd | 1475 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1476 | { |
50dd0969 | 1477 | struct acpi_video_device *video_device = data; |
4be44fcd | 1478 | struct acpi_device *device = NULL; |
e9dab196 LY |
1479 | struct acpi_video_bus *bus; |
1480 | struct input_dev *input; | |
17c452f9 | 1481 | int keycode = 0; |
1da177e4 | 1482 | |
1da177e4 | 1483 | if (!video_device) |
d550d98d | 1484 | return; |
1da177e4 | 1485 | |
e6afa0de | 1486 | device = video_device->dev; |
e9dab196 LY |
1487 | bus = video_device->video; |
1488 | input = bus->input; | |
1da177e4 LT |
1489 | |
1490 | switch (event) { | |
4be44fcd | 1491 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1492 | if (brightness_switch_enabled) |
1493 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1494 | keycode = KEY_BRIGHTNESS_CYCLE; |
1495 | break; | |
4be44fcd | 1496 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1497 | if (brightness_switch_enabled) |
1498 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1499 | keycode = KEY_BRIGHTNESSUP; |
1500 | break; | |
4be44fcd | 1501 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1502 | if (brightness_switch_enabled) |
1503 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1504 | keycode = KEY_BRIGHTNESSDOWN; |
1505 | break; | |
70f23fd6 | 1506 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1507 | if (brightness_switch_enabled) |
1508 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1509 | keycode = KEY_BRIGHTNESS_ZERO; |
1510 | break; | |
4be44fcd | 1511 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1512 | if (brightness_switch_enabled) |
1513 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 | 1514 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1515 | break; |
1516 | default: | |
1517 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1518 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1519 | break; |
1520 | } | |
e9dab196 | 1521 | |
7761f638 | 1522 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1523 | |
1524 | if (keycode) { | |
1525 | input_report_key(input, keycode, 1); | |
1526 | input_sync(input); | |
1527 | input_report_key(input, keycode, 0); | |
1528 | input_sync(input); | |
1529 | } | |
e9dab196 | 1530 | |
d550d98d | 1531 | return; |
1da177e4 LT |
1532 | } |
1533 | ||
ac7729da RW |
1534 | static int acpi_video_resume(struct notifier_block *nb, |
1535 | unsigned long val, void *ign) | |
863c1490 MG |
1536 | { |
1537 | struct acpi_video_bus *video; | |
1538 | struct acpi_video_device *video_device; | |
1539 | int i; | |
1540 | ||
ac7729da RW |
1541 | switch (val) { |
1542 | case PM_HIBERNATION_PREPARE: | |
1543 | case PM_SUSPEND_PREPARE: | |
1544 | case PM_RESTORE_PREPARE: | |
1545 | return NOTIFY_DONE; | |
1546 | } | |
863c1490 | 1547 | |
ac7729da RW |
1548 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1549 | ||
1550 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1551 | |
1552 | for (i = 0; i < video->attached_count; i++) { | |
1553 | video_device = video->attached_array[i].bind_info; | |
1554 | if (video_device && video_device->backlight) | |
1555 | acpi_video_set_brightness(video_device->backlight); | |
1556 | } | |
ac7729da RW |
1557 | |
1558 | return NOTIFY_OK; | |
863c1490 MG |
1559 | } |
1560 | ||
c504f8cb ZR |
1561 | static acpi_status |
1562 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1563 | void **return_value) | |
1564 | { | |
1565 | struct acpi_device *device = context; | |
1566 | struct acpi_device *sibling; | |
1567 | int result; | |
1568 | ||
1569 | if (handle == device->handle) | |
1570 | return AE_CTRL_TERMINATE; | |
1571 | ||
1572 | result = acpi_bus_get_device(handle, &sibling); | |
1573 | if (result) | |
1574 | return AE_OK; | |
1575 | ||
1576 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1577 | return AE_ALREADY_EXISTS; | |
1578 | ||
1579 | return AE_OK; | |
1580 | } | |
1581 | ||
67b662e1 AL |
1582 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1583 | { | |
fbc9fe1b | 1584 | if (acpi_video_verify_backlight_support()) { |
67b662e1 AL |
1585 | struct backlight_properties props; |
1586 | struct pci_dev *pdev; | |
1587 | acpi_handle acpi_parent; | |
1588 | struct device *parent = NULL; | |
1589 | int result; | |
1590 | static int count; | |
1591 | char *name; | |
1592 | ||
1593 | result = acpi_video_init_brightness(device); | |
1594 | if (result) | |
1595 | return; | |
1596 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1597 | if (!name) | |
1598 | return; | |
1599 | count++; | |
1600 | ||
1601 | acpi_get_parent(device->dev->handle, &acpi_parent); | |
1602 | ||
1603 | pdev = acpi_get_pci_dev(acpi_parent); | |
1604 | if (pdev) { | |
1605 | parent = &pdev->dev; | |
1606 | pci_dev_put(pdev); | |
1607 | } | |
1608 | ||
1609 | memset(&props, 0, sizeof(struct backlight_properties)); | |
1610 | props.type = BACKLIGHT_FIRMWARE; | |
1611 | props.max_brightness = device->brightness->count - 3; | |
1612 | device->backlight = backlight_device_register(name, | |
1613 | parent, | |
1614 | device, | |
1615 | &acpi_backlight_ops, | |
1616 | &props); | |
1617 | kfree(name); | |
1618 | if (IS_ERR(device->backlight)) | |
1619 | return; | |
1620 | ||
1621 | /* | |
1622 | * Save current brightness level in case we have to restore it | |
1623 | * before acpi_video_device_lcd_set_level() is called next time. | |
1624 | */ | |
1625 | device->backlight->props.brightness = | |
1626 | acpi_video_get_brightness(device->backlight); | |
1627 | ||
1628 | device->cooling_dev = thermal_cooling_device_register("LCD", | |
1629 | device->dev, &video_cooling_ops); | |
1630 | if (IS_ERR(device->cooling_dev)) { | |
1631 | /* | |
1632 | * Set cooling_dev to NULL so we don't crash trying to | |
1633 | * free it. | |
1634 | * Also, why the hell we are returning early and | |
1635 | * not attempt to register video output if cooling | |
1636 | * device registration failed? | |
1637 | * -- dtor | |
1638 | */ | |
1639 | device->cooling_dev = NULL; | |
1640 | return; | |
1641 | } | |
1642 | ||
1643 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1644 | device->cooling_dev->id); | |
1645 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1646 | &device->cooling_dev->device.kobj, | |
1647 | "thermal_cooling"); | |
1648 | if (result) | |
1649 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1650 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1651 | &device->dev->dev.kobj, "device"); | |
1652 | if (result) | |
1653 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) | |
1658 | { | |
1659 | struct acpi_video_device *dev; | |
1660 | ||
1661 | mutex_lock(&video->device_list_lock); | |
1662 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1663 | acpi_video_dev_register_backlight(dev); | |
1664 | mutex_unlock(&video->device_list_lock); | |
1665 | ||
1666 | video->pm_nb.notifier_call = acpi_video_resume; | |
1667 | video->pm_nb.priority = 0; | |
1668 | return register_pm_notifier(&video->pm_nb); | |
1669 | } | |
1670 | ||
1671 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1672 | { | |
1673 | if (device->backlight) { | |
1674 | backlight_device_unregister(device->backlight); | |
1675 | device->backlight = NULL; | |
1676 | } | |
1677 | if (device->brightness) { | |
1678 | kfree(device->brightness->levels); | |
1679 | kfree(device->brightness); | |
1680 | device->brightness = NULL; | |
1681 | } | |
1682 | if (device->cooling_dev) { | |
1683 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1684 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1685 | thermal_cooling_device_unregister(device->cooling_dev); | |
1686 | device->cooling_dev = NULL; | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1691 | { | |
1692 | struct acpi_video_device *dev; | |
1693 | int error = unregister_pm_notifier(&video->pm_nb); | |
1694 | ||
1695 | mutex_lock(&video->device_list_lock); | |
1696 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1697 | acpi_video_dev_unregister_backlight(dev); | |
1698 | mutex_unlock(&video->device_list_lock); | |
1699 | ||
1700 | return error; | |
1701 | } | |
1702 | ||
1703 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1704 | { | |
1705 | acpi_status status; | |
1706 | struct acpi_device *adev = device->dev; | |
1707 | ||
1708 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1709 | acpi_video_device_notify, device); | |
1710 | if (ACPI_FAILURE(status)) | |
1711 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1712 | else | |
1713 | device->flags.notify = 1; | |
1714 | } | |
1715 | ||
1716 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1717 | { | |
1718 | struct input_dev *input; | |
1719 | struct acpi_video_device *dev; | |
1720 | int error; | |
1721 | ||
1722 | video->input = input = input_allocate_device(); | |
1723 | if (!input) { | |
1724 | error = -ENOMEM; | |
1725 | goto out; | |
1726 | } | |
1727 | ||
1728 | error = acpi_video_bus_start_devices(video); | |
1729 | if (error) | |
1730 | goto err_free_input; | |
1731 | ||
1732 | snprintf(video->phys, sizeof(video->phys), | |
1733 | "%s/video/input0", acpi_device_hid(video->device)); | |
1734 | ||
1735 | input->name = acpi_device_name(video->device); | |
1736 | input->phys = video->phys; | |
1737 | input->id.bustype = BUS_HOST; | |
1738 | input->id.product = 0x06; | |
1739 | input->dev.parent = &video->device->dev; | |
1740 | input->evbit[0] = BIT(EV_KEY); | |
1741 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1742 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1743 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1744 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1745 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1746 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1747 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1748 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1749 | ||
1750 | error = input_register_device(input); | |
1751 | if (error) | |
1752 | goto err_stop_dev; | |
1753 | ||
1754 | mutex_lock(&video->device_list_lock); | |
1755 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1756 | acpi_video_dev_add_notify_handler(dev); | |
1757 | mutex_unlock(&video->device_list_lock); | |
1758 | ||
1759 | return 0; | |
1760 | ||
1761 | err_stop_dev: | |
1762 | acpi_video_bus_stop_devices(video); | |
1763 | err_free_input: | |
1764 | input_free_device(input); | |
1765 | video->input = NULL; | |
1766 | out: | |
1767 | return error; | |
1768 | } | |
1769 | ||
1770 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1771 | { | |
1772 | if (dev->flags.notify) { | |
1773 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1774 | acpi_video_device_notify); | |
1775 | dev->flags.notify = 0; | |
1776 | } | |
1777 | } | |
1778 | ||
1779 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1780 | { | |
1781 | struct acpi_video_device *dev; | |
1782 | ||
1783 | mutex_lock(&video->device_list_lock); | |
1784 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1785 | acpi_video_dev_remove_notify_handler(dev); | |
1786 | mutex_unlock(&video->device_list_lock); | |
1787 | ||
1788 | acpi_video_bus_stop_devices(video); | |
1789 | input_unregister_device(video->input); | |
1790 | video->input = NULL; | |
1791 | } | |
1792 | ||
1793 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1794 | { | |
1795 | struct acpi_video_device *dev, *next; | |
1796 | ||
1797 | mutex_lock(&video->device_list_lock); | |
1798 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1799 | list_del(&dev->entry); | |
1800 | kfree(dev); | |
1801 | } | |
1802 | mutex_unlock(&video->device_list_lock); | |
1803 | ||
1804 | return 0; | |
1805 | } | |
1806 | ||
ac7729da RW |
1807 | static int instance; |
1808 | ||
4be44fcd | 1809 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1810 | { |
f51e8391 | 1811 | struct acpi_video_bus *video; |
f51e8391 | 1812 | int error; |
c504f8cb ZR |
1813 | acpi_status status; |
1814 | ||
1815 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1816 | device->parent->handle, 1, | |
1817 | acpi_video_bus_match, NULL, | |
1818 | device, NULL); | |
1819 | if (status == AE_ALREADY_EXISTS) { | |
1820 | printk(KERN_WARNING FW_BUG | |
1821 | "Duplicate ACPI video bus devices for the" | |
1822 | " same VGA controller, please try module " | |
1823 | "parameter \"video.allow_duplicates=1\"" | |
1824 | "if the current driver doesn't work.\n"); | |
1825 | if (!allow_duplicates) | |
1826 | return -ENODEV; | |
1827 | } | |
1da177e4 | 1828 | |
36bcbec7 | 1829 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1830 | if (!video) |
d550d98d | 1831 | return -ENOMEM; |
1da177e4 | 1832 | |
e6d9da1d ZR |
1833 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1834 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1835 | if (instance) | |
1836 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1837 | instance++; |
e6d9da1d | 1838 | } |
f3b39f13 ZY |
1839 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1840 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1841 | if (instance) | |
1842 | device->pnp.bus_id[3] = '0' + instance; | |
1843 | instance++; | |
1844 | } | |
e6d9da1d | 1845 | |
e6afa0de | 1846 | video->device = device; |
1da177e4 LT |
1847 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1848 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1849 | device->driver_data = video; |
1da177e4 LT |
1850 | |
1851 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1852 | error = acpi_video_bus_check(video); |
1853 | if (error) | |
1854 | goto err_free_video; | |
1da177e4 | 1855 | |
bbac81f5 | 1856 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1857 | INIT_LIST_HEAD(&video->video_device_list); |
1858 | ||
ea9f8856 IM |
1859 | error = acpi_video_bus_get_devices(video, device); |
1860 | if (error) | |
91e13aa3 | 1861 | goto err_put_video; |
1da177e4 | 1862 | |
1da177e4 | 1863 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1864 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1865 | video->flags.multihead ? "yes" : "no", | |
1866 | video->flags.rom ? "yes" : "no", | |
1867 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1868 | mutex_lock(&video_list_lock); |
1869 | list_add_tail(&video->entry, &video_bus_head); | |
1870 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1871 | |
67b662e1 AL |
1872 | acpi_video_bus_register_backlight(video); |
1873 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1874 | |
f51e8391 DT |
1875 | return 0; |
1876 | ||
67b662e1 | 1877 | err_put_video: |
f51e8391 DT |
1878 | acpi_video_bus_put_devices(video); |
1879 | kfree(video->attached_array); | |
67b662e1 | 1880 | err_free_video: |
f51e8391 | 1881 | kfree(video); |
db89b4f0 | 1882 | device->driver_data = NULL; |
1da177e4 | 1883 | |
f51e8391 | 1884 | return error; |
1da177e4 LT |
1885 | } |
1886 | ||
51fac838 | 1887 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1888 | { |
4be44fcd | 1889 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1890 | |
1da177e4 LT |
1891 | |
1892 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1893 | return -EINVAL; |
1da177e4 | 1894 | |
50dd0969 | 1895 | video = acpi_driver_data(device); |
1da177e4 | 1896 | |
67b662e1 AL |
1897 | acpi_video_bus_remove_notify_handler(video); |
1898 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1899 | acpi_video_bus_put_devices(video); |
1da177e4 | 1900 | |
67b662e1 AL |
1901 | mutex_lock(&video_list_lock); |
1902 | list_del(&video->entry); | |
1903 | mutex_unlock(&video_list_lock); | |
1904 | ||
6044ec88 | 1905 | kfree(video->attached_array); |
1da177e4 LT |
1906 | kfree(video); |
1907 | ||
d550d98d | 1908 | return 0; |
1da177e4 LT |
1909 | } |
1910 | ||
c6996bdd AC |
1911 | static int __init is_i740(struct pci_dev *dev) |
1912 | { | |
1913 | if (dev->device == 0x00D1) | |
1914 | return 1; | |
1915 | if (dev->device == 0x7000) | |
1916 | return 1; | |
1917 | return 0; | |
1918 | } | |
1919 | ||
74a365b3 MG |
1920 | static int __init intel_opregion_present(void) |
1921 | { | |
c6996bdd | 1922 | int opregion = 0; |
74a365b3 MG |
1923 | struct pci_dev *dev = NULL; |
1924 | u32 address; | |
1925 | ||
1926 | for_each_pci_dev(dev) { | |
1927 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1928 | continue; | |
1929 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1930 | continue; | |
c6996bdd AC |
1931 | /* We don't want to poke around undefined i740 registers */ |
1932 | if (is_i740(dev)) | |
1933 | continue; | |
74a365b3 MG |
1934 | pci_read_config_dword(dev, 0xfc, &address); |
1935 | if (!address) | |
1936 | continue; | |
c6996bdd | 1937 | opregion = 1; |
74a365b3 | 1938 | } |
c6996bdd | 1939 | return opregion; |
74a365b3 MG |
1940 | } |
1941 | ||
8e5c2b77 | 1942 | int acpi_video_register(void) |
1da177e4 | 1943 | { |
8e5c2b77 | 1944 | int result = 0; |
86e437f0 ZY |
1945 | if (register_count) { |
1946 | /* | |
8e5c2b77 RW |
1947 | * if the function of acpi_video_register is already called, |
1948 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
1949 | */ |
1950 | return 0; | |
1951 | } | |
1da177e4 | 1952 | |
67b662e1 AL |
1953 | mutex_init(&video_list_lock); |
1954 | INIT_LIST_HEAD(&video_bus_head); | |
1955 | ||
1da177e4 | 1956 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1957 | if (result < 0) |
d550d98d | 1958 | return -ENODEV; |
1da177e4 | 1959 | |
86e437f0 ZY |
1960 | /* |
1961 | * When the acpi_video_bus is loaded successfully, increase | |
1962 | * the counter reference. | |
1963 | */ | |
1964 | register_count = 1; | |
1965 | ||
d550d98d | 1966 | return 0; |
1da177e4 | 1967 | } |
8e5c2b77 | 1968 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 1969 | |
86e437f0 ZY |
1970 | void acpi_video_unregister(void) |
1971 | { | |
1972 | if (!register_count) { | |
1973 | /* | |
1974 | * If the acpi video bus is already unloaded, don't | |
1975 | * unload it again and return directly. | |
1976 | */ | |
1977 | return; | |
1978 | } | |
1979 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1980 | ||
86e437f0 ZY |
1981 | register_count = 0; |
1982 | ||
1983 | return; | |
1984 | } | |
1985 | EXPORT_SYMBOL(acpi_video_unregister); | |
1986 | ||
74a365b3 MG |
1987 | /* |
1988 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1989 | * the video opregion code to be run first in order to initialise | |
1990 | * state before any ACPI video calls are made. To handle this we defer | |
1991 | * registration of the video class until the opregion code has run. | |
1992 | */ | |
1993 | ||
1994 | static int __init acpi_video_init(void) | |
1995 | { | |
45cb50e6 ZR |
1996 | dmi_check_system(video_dmi_table); |
1997 | ||
74a365b3 MG |
1998 | if (intel_opregion_present()) |
1999 | return 0; | |
2000 | ||
2001 | return acpi_video_register(); | |
2002 | } | |
1da177e4 | 2003 | |
86e437f0 | 2004 | static void __exit acpi_video_exit(void) |
1da177e4 | 2005 | { |
86e437f0 | 2006 | acpi_video_unregister(); |
1da177e4 | 2007 | |
d550d98d | 2008 | return; |
1da177e4 LT |
2009 | } |
2010 | ||
2011 | module_init(acpi_video_init); | |
2012 | module_exit(acpi_video_exit); |