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Commit | Line | Data |
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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 | * | |
1da177e4 LT |
20 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
21 | */ | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/list.h> | |
bbac81f5 | 28 | #include <linux/mutex.h> |
e9dab196 | 29 | #include <linux/input.h> |
2f3d000a | 30 | #include <linux/backlight.h> |
702ed512 | 31 | #include <linux/thermal.h> |
935e5f29 | 32 | #include <linux/sort.h> |
74a365b3 MG |
33 | #include <linux/pci.h> |
34 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 35 | #include <linux/slab.h> |
eb27cae8 | 36 | #include <linux/dmi.h> |
ac7729da | 37 | #include <linux/suspend.h> |
8b48463f | 38 | #include <linux/acpi.h> |
e92a7162 | 39 | #include <acpi/video.h> |
7c0f6ba6 | 40 | #include <linux/uaccess.h> |
1da177e4 | 41 | |
14ca7a47 | 42 | #define PREFIX "ACPI: " |
8c5bd7ad | 43 | |
1da177e4 LT |
44 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
45 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
1da177e4 | 46 | |
2f3d000a | 47 | #define MAX_NAME_LEN 20 |
1da177e4 | 48 | |
1da177e4 | 49 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 50 | ACPI_MODULE_NAME("video"); |
1da177e4 | 51 | |
f52fd66d | 52 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 53 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
54 | MODULE_LICENSE("GPL"); |
55 | ||
2843768b | 56 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
57 | module_param(brightness_switch_enabled, bool, 0644); |
58 | ||
c504f8cb ZR |
59 | /* |
60 | * By default, we don't allow duplicate ACPI video bus devices | |
61 | * under the same VGA controller | |
62 | */ | |
90ab5ee9 | 63 | static bool allow_duplicates; |
c504f8cb ZR |
64 | module_param(allow_duplicates, bool, 0644); |
65 | ||
654a182d HG |
66 | static int disable_backlight_sysfs_if = -1; |
67 | module_param(disable_backlight_sysfs_if, int, 0444); | |
68 | ||
05bc59a0 HG |
69 | #define REPORT_OUTPUT_KEY_EVENTS 0x01 |
70 | #define REPORT_BRIGHTNESS_KEY_EVENTS 0x02 | |
71 | static int report_key_events = -1; | |
72 | module_param(report_key_events, int, 0644); | |
73 | MODULE_PARM_DESC(report_key_events, | |
74 | "0: none, 1: output changes, 2: brightness changes, 3: all"); | |
75 | ||
e50b9be1 AL |
76 | static bool device_id_scheme = false; |
77 | module_param(device_id_scheme, bool, 0444); | |
78 | ||
79 | static bool only_lcd = false; | |
80 | module_param(only_lcd, bool, 0444); | |
81 | ||
970530cd HG |
82 | static int register_count; |
83 | static DEFINE_MUTEX(register_count_mutex); | |
14e93553 HG |
84 | static DEFINE_MUTEX(video_list_lock); |
85 | static LIST_HEAD(video_bus_head); | |
4be44fcd | 86 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 87 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 88 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
93a291df | 89 | void acpi_video_detect_exit(void); |
1da177e4 | 90 | |
1ba90e3a TR |
91 | static const struct acpi_device_id video_device_ids[] = { |
92 | {ACPI_VIDEO_HID, 0}, | |
93 | {"", 0}, | |
94 | }; | |
95 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
96 | ||
1da177e4 | 97 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 98 | .name = "video", |
1da177e4 | 99 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 100 | .ids = video_device_ids, |
1da177e4 LT |
101 | .ops = { |
102 | .add = acpi_video_bus_add, | |
103 | .remove = acpi_video_bus_remove, | |
7015558f | 104 | .notify = acpi_video_bus_notify, |
4be44fcd | 105 | }, |
1da177e4 LT |
106 | }; |
107 | ||
108 | struct acpi_video_bus_flags { | |
4be44fcd LB |
109 | u8 multihead:1; /* can switch video heads */ |
110 | u8 rom:1; /* can retrieve a video rom */ | |
111 | u8 post:1; /* can configure the head to */ | |
112 | u8 reserved:5; | |
1da177e4 LT |
113 | }; |
114 | ||
115 | struct acpi_video_bus_cap { | |
21fcb34e FC |
116 | u8 _DOS:1; /* Enable/Disable output switching */ |
117 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
118 | u8 _ROM:1; /* Get ROM Data */ | |
119 | u8 _GPD:1; /* Get POST Device */ | |
120 | u8 _SPD:1; /* Set POST Device */ | |
121 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 122 | u8 reserved:2; |
1da177e4 LT |
123 | }; |
124 | ||
4be44fcd LB |
125 | struct acpi_video_device_attrib { |
126 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
127 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
128 | u32 display_type:4; /* Describe the specific type in use */ | |
129 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
130 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
131 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 132 | the VGA device. */ |
21fcb34e FC |
133 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
134 | u32 reserved:10; /* Must be 0 */ | |
135 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
136 | }; |
137 | ||
138 | struct acpi_video_enumerated_device { | |
139 | union { | |
140 | u32 int_val; | |
4be44fcd | 141 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
142 | } value; |
143 | struct acpi_video_device *bind_info; | |
144 | }; | |
145 | ||
146 | struct acpi_video_bus { | |
e6afa0de | 147 | struct acpi_device *device; |
99678ed7 | 148 | bool backlight_registered; |
4be44fcd | 149 | u8 dos_setting; |
1da177e4 | 150 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd | 151 | u8 attached_count; |
b4df4636 | 152 | u8 child_count; |
4be44fcd | 153 | struct acpi_video_bus_cap cap; |
1da177e4 | 154 | struct acpi_video_bus_flags flags; |
4be44fcd | 155 | struct list_head video_device_list; |
bbac81f5 | 156 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 157 | struct list_head entry; |
e9dab196 LY |
158 | struct input_dev *input; |
159 | char phys[32]; /* for input device */ | |
ac7729da | 160 | struct notifier_block pm_nb; |
1da177e4 LT |
161 | }; |
162 | ||
163 | struct acpi_video_device_flags { | |
4be44fcd LB |
164 | u8 crt:1; |
165 | u8 lcd:1; | |
166 | u8 tvout:1; | |
82cae999 | 167 | u8 dvi:1; |
4be44fcd LB |
168 | u8 bios:1; |
169 | u8 unknown:1; | |
91e13aa3 AL |
170 | u8 notify:1; |
171 | u8 reserved:1; | |
1da177e4 LT |
172 | }; |
173 | ||
174 | struct acpi_video_device_cap { | |
21fcb34e FC |
175 | u8 _ADR:1; /* Return the unique ID */ |
176 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
177 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 178 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 179 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 180 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
181 | }; |
182 | ||
1da177e4 | 183 | struct acpi_video_device { |
4be44fcd LB |
184 | unsigned long device_id; |
185 | struct acpi_video_device_flags flags; | |
186 | struct acpi_video_device_cap cap; | |
187 | struct list_head entry; | |
8ab58e8e LT |
188 | struct delayed_work switch_brightness_work; |
189 | int switch_brightness_event; | |
4be44fcd LB |
190 | struct acpi_video_bus *video; |
191 | struct acpi_device *dev; | |
1da177e4 | 192 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 193 | struct backlight_device *backlight; |
4a703a8f | 194 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
195 | }; |
196 | ||
4be44fcd LB |
197 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
198 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
199 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
200 | struct acpi_video_device *device); | |
1da177e4 | 201 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
202 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
203 | int level); | |
204 | static int acpi_video_device_lcd_get_level_current( | |
205 | struct acpi_video_device *device, | |
a89803df | 206 | unsigned long long *level, bool raw); |
4be44fcd LB |
207 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
208 | u32 level_current, u32 event); | |
8ab58e8e | 209 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 210 | |
21fcb34e | 211 | /* backlight device sysfs support */ |
2f3d000a YL |
212 | static int acpi_video_get_brightness(struct backlight_device *bd) |
213 | { | |
27663c58 | 214 | unsigned long long cur_level; |
38531e6f | 215 | int i; |
7c364e79 | 216 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 217 | |
a89803df | 218 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 219 | return -EINVAL; |
38531e6f MG |
220 | for (i = 2; i < vd->brightness->count; i++) { |
221 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
222 | /* |
223 | * The first two entries are special - see page 575 | |
224 | * of the ACPI spec 3.0 | |
225 | */ | |
915ea7e4 | 226 | return i - 2; |
38531e6f MG |
227 | } |
228 | return 0; | |
2f3d000a YL |
229 | } |
230 | ||
231 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
232 | { | |
24450c7a | 233 | int request_level = bd->props.brightness + 2; |
7c364e79 | 234 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 235 | |
8ab58e8e | 236 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
237 | return acpi_video_device_lcd_set_level(vd, |
238 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
239 | } |
240 | ||
acc2472e | 241 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
242 | .get_brightness = acpi_video_get_brightness, |
243 | .update_status = acpi_video_set_brightness, | |
244 | }; | |
245 | ||
702ed512 | 246 | /* thermal cooling device callbacks */ |
4a703a8f | 247 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 248 | long *state) |
702ed512 | 249 | { |
4a703a8f | 250 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
251 | struct acpi_video_device *video = acpi_driver_data(device); |
252 | ||
6503e5df MG |
253 | *state = video->brightness->count - 3; |
254 | return 0; | |
702ed512 ZR |
255 | } |
256 | ||
4a703a8f | 257 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 258 | long *state) |
702ed512 | 259 | { |
4a703a8f | 260 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 261 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 262 | unsigned long long level; |
6503e5df | 263 | int offset; |
702ed512 | 264 | |
a89803df | 265 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 266 | return -EINVAL; |
6503e5df MG |
267 | for (offset = 2; offset < video->brightness->count; offset++) |
268 | if (level == video->brightness->levels[offset]) { | |
269 | *state = video->brightness->count - offset - 1; | |
270 | return 0; | |
271 | } | |
702ed512 ZR |
272 | |
273 | return -EINVAL; | |
274 | } | |
275 | ||
276 | static int | |
4a703a8f | 277 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 278 | { |
4a703a8f | 279 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
280 | struct acpi_video_device *video = acpi_driver_data(device); |
281 | int level; | |
282 | ||
915ea7e4 | 283 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
284 | return -EINVAL; |
285 | ||
286 | state = video->brightness->count - state; | |
915ea7e4 | 287 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
288 | return acpi_video_device_lcd_set_level(video, level); |
289 | } | |
290 | ||
9c8b04be | 291 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
292 | .get_max_state = video_get_max_state, |
293 | .get_cur_state = video_get_cur_state, | |
294 | .set_cur_state = video_set_cur_state, | |
295 | }; | |
296 | ||
21fcb34e FC |
297 | /* |
298 | * -------------------------------------------------------------------------- | |
299 | * Video Management | |
300 | * -------------------------------------------------------------------------- | |
301 | */ | |
1da177e4 | 302 | |
1da177e4 | 303 | static int |
05950094 | 304 | acpi_video_device_lcd_query_levels(acpi_handle handle, |
4be44fcd | 305 | union acpi_object **levels) |
1da177e4 | 306 | { |
4be44fcd LB |
307 | int status; |
308 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
309 | union acpi_object *obj; | |
1da177e4 | 310 | |
1da177e4 LT |
311 | |
312 | *levels = NULL; | |
313 | ||
05950094 | 314 | status = acpi_evaluate_object(handle, "_BCL", NULL, &buffer); |
1da177e4 | 315 | if (!ACPI_SUCCESS(status)) |
d550d98d | 316 | return status; |
4be44fcd | 317 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 318 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 319 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
320 | status = -EFAULT; |
321 | goto err; | |
322 | } | |
323 | ||
324 | *levels = obj; | |
325 | ||
d550d98d | 326 | return 0; |
1da177e4 | 327 | |
915ea7e4 | 328 | err: |
6044ec88 | 329 | kfree(buffer.pointer); |
1da177e4 | 330 | |
d550d98d | 331 | return status; |
1da177e4 LT |
332 | } |
333 | ||
334 | static int | |
4be44fcd | 335 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 336 | { |
24450c7a | 337 | int status; |
9e6dada9 | 338 | int state; |
1da177e4 | 339 | |
0db98202 JL |
340 | status = acpi_execute_simple_method(device->dev->handle, |
341 | "_BCM", level); | |
24450c7a ZR |
342 | if (ACPI_FAILURE(status)) { |
343 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
344 | return -EIO; | |
345 | } | |
346 | ||
4500ca8e | 347 | device->brightness->curr = level; |
9e6dada9 | 348 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 349 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
350 | if (device->backlight) |
351 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
352 | return 0; |
353 | } | |
9e6dada9 | 354 | |
24450c7a ZR |
355 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
356 | return -EINVAL; | |
1da177e4 LT |
357 | } |
358 | ||
45cb50e6 ZR |
359 | /* |
360 | * For some buggy _BQC methods, we need to add a constant value to | |
361 | * the _BQC return value to get the actual current brightness level | |
362 | */ | |
363 | ||
364 | static int bqc_offset_aml_bug_workaround; | |
7ee33baa | 365 | static int video_set_bqc_offset(const struct dmi_system_id *d) |
45cb50e6 ZR |
366 | { |
367 | bqc_offset_aml_bug_workaround = 9; | |
368 | return 0; | |
369 | } | |
370 | ||
7ee33baa | 371 | static int video_disable_backlight_sysfs_if( |
654a182d HG |
372 | const struct dmi_system_id *d) |
373 | { | |
374 | if (disable_backlight_sysfs_if == -1) | |
375 | disable_backlight_sysfs_if = 1; | |
376 | return 0; | |
377 | } | |
378 | ||
e50b9be1 AL |
379 | static int video_set_device_id_scheme(const struct dmi_system_id *d) |
380 | { | |
381 | device_id_scheme = true; | |
382 | return 0; | |
383 | } | |
384 | ||
385 | static int video_enable_only_lcd(const struct dmi_system_id *d) | |
386 | { | |
387 | only_lcd = true; | |
388 | return 0; | |
389 | } | |
390 | ||
4b4b3b20 HG |
391 | static int video_set_report_key_events(const struct dmi_system_id *id) |
392 | { | |
393 | if (report_key_events == -1) | |
394 | report_key_events = (uintptr_t)id->driver_data; | |
395 | return 0; | |
396 | } | |
397 | ||
7ee33baa | 398 | static struct dmi_system_id video_dmi_table[] = { |
45cb50e6 ZR |
399 | /* |
400 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
401 | */ | |
402 | { | |
403 | .callback = video_set_bqc_offset, | |
404 | .ident = "Acer Aspire 5720", | |
405 | .matches = { | |
406 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
407 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
408 | }, | |
409 | }, | |
5afc4abe LB |
410 | { |
411 | .callback = video_set_bqc_offset, | |
412 | .ident = "Acer Aspire 5710Z", | |
413 | .matches = { | |
414 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
415 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
416 | }, | |
417 | }, | |
34ac272b ZR |
418 | { |
419 | .callback = video_set_bqc_offset, | |
420 | .ident = "eMachines E510", | |
421 | .matches = { | |
422 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
423 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
424 | }, | |
425 | }, | |
93bcece2 ZR |
426 | { |
427 | .callback = video_set_bqc_offset, | |
428 | .ident = "Acer Aspire 5315", | |
429 | .matches = { | |
430 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
431 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
432 | }, | |
433 | }, | |
152a4e63 ZR |
434 | { |
435 | .callback = video_set_bqc_offset, | |
436 | .ident = "Acer Aspire 7720", | |
437 | .matches = { | |
438 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
439 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
440 | }, | |
441 | }, | |
5f24079b | 442 | |
654a182d HG |
443 | /* |
444 | * Some machines have a broken acpi-video interface for brightness | |
445 | * control, but still need an acpi_video_device_lcd_set_level() call | |
446 | * on resume to turn the backlight power on. We Enable backlight | |
447 | * control on these systems, but do not register a backlight sysfs | |
448 | * as brightness control does not work. | |
449 | */ | |
de588b8f HG |
450 | { |
451 | /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ | |
452 | .callback = video_disable_backlight_sysfs_if, | |
453 | .ident = "Toshiba Portege R700", | |
454 | .matches = { | |
455 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
456 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"), | |
457 | }, | |
458 | }, | |
654a182d HG |
459 | { |
460 | /* https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ | |
461 | .callback = video_disable_backlight_sysfs_if, | |
462 | .ident = "Toshiba Portege R830", | |
463 | .matches = { | |
464 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
465 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R830"), | |
466 | }, | |
467 | }, | |
b21f2e81 HG |
468 | { |
469 | /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ | |
470 | .callback = video_disable_backlight_sysfs_if, | |
471 | .ident = "Toshiba Satellite R830", | |
472 | .matches = { | |
473 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
474 | DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE R830"), | |
475 | }, | |
476 | }, | |
e50b9be1 AL |
477 | /* |
478 | * Some machine's _DOD IDs don't have bit 31(Device ID Scheme) set | |
479 | * but the IDs actually follow the Device ID Scheme. | |
480 | */ | |
481 | { | |
482 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
483 | .callback = video_set_device_id_scheme, | |
484 | .ident = "ESPRIMO Mobile M9410", | |
485 | .matches = { | |
486 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
487 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"), | |
488 | }, | |
489 | }, | |
490 | /* | |
491 | * Some machines have multiple video output devices, but only the one | |
492 | * that is the type of LCD can do the backlight control so we should not | |
493 | * register backlight interface for other video output devices. | |
494 | */ | |
495 | { | |
496 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
497 | .callback = video_enable_only_lcd, | |
498 | .ident = "ESPRIMO Mobile M9410", | |
499 | .matches = { | |
500 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
501 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"), | |
502 | }, | |
503 | }, | |
4b4b3b20 HG |
504 | /* |
505 | * Some machines report wrong key events on the acpi-bus, suppress | |
506 | * key event reporting on these. Note this is only intended to work | |
507 | * around events which are plain wrong. In some cases we get double | |
508 | * events, in this case acpi-video is considered the canonical source | |
509 | * and the events from the other source should be filtered. E.g. | |
510 | * by calling acpi_video_handles_brightness_key_presses() from the | |
511 | * vendor acpi/wmi driver or by using /lib/udev/hwdb.d/60-keyboard.hwdb | |
512 | */ | |
513 | { | |
514 | .callback = video_set_report_key_events, | |
515 | .driver_data = (void *)((uintptr_t)REPORT_OUTPUT_KEY_EVENTS), | |
516 | .ident = "Dell Vostro V131", | |
517 | .matches = { | |
518 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
519 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), | |
520 | }, | |
521 | }, | |
45cb50e6 ZR |
522 | {} |
523 | }; | |
524 | ||
994fa63c DB |
525 | static unsigned long long |
526 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
527 | unsigned long long bqc_value) | |
528 | { | |
529 | unsigned long long level; | |
530 | ||
531 | if (device->brightness->flags._BQC_use_index) { | |
532 | /* | |
533 | * _BQC returns an index that doesn't account for | |
534 | * the first 2 items with special meaning, so we need | |
535 | * to compensate for that by offsetting ourselves | |
536 | */ | |
537 | if (device->brightness->flags._BCL_reversed) | |
538 | bqc_value = device->brightness->count - 3 - bqc_value; | |
539 | ||
540 | level = device->brightness->levels[bqc_value + 2]; | |
541 | } else { | |
542 | level = bqc_value; | |
543 | } | |
544 | ||
545 | level += bqc_offset_aml_bug_workaround; | |
546 | ||
547 | return level; | |
548 | } | |
549 | ||
1da177e4 | 550 | static int |
4be44fcd | 551 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 552 | unsigned long long *level, bool raw) |
1da177e4 | 553 | { |
c8890f90 | 554 | acpi_status status = AE_OK; |
4e231fa4 | 555 | int i; |
c8890f90 | 556 | |
c60d638e ZR |
557 | if (device->cap._BQC || device->cap._BCQ) { |
558 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
559 | ||
560 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
561 | NULL, level); |
562 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
563 | if (raw) { |
564 | /* | |
565 | * Caller has indicated he wants the raw | |
566 | * value returned by _BQC, so don't furtherly | |
567 | * mess with the value. | |
568 | */ | |
569 | return 0; | |
570 | } | |
571 | ||
994fa63c | 572 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 573 | |
4e231fa4 VS |
574 | for (i = 2; i < device->brightness->count; i++) |
575 | if (device->brightness->levels[i] == *level) { | |
576 | device->brightness->curr = *level; | |
577 | return 0; | |
915ea7e4 | 578 | } |
a89803df DB |
579 | /* |
580 | * BQC returned an invalid level. | |
581 | * Stop using it. | |
582 | */ | |
583 | ACPI_WARNING((AE_INFO, | |
584 | "%s returned an invalid level", | |
585 | buf)); | |
586 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 587 | } else { |
21fcb34e FC |
588 | /* |
589 | * Fixme: | |
c8890f90 ZR |
590 | * should we return an error or ignore this failure? |
591 | * dev->brightness->curr is a cached value which stores | |
592 | * the correct current backlight level in most cases. | |
593 | * ACPI video backlight still works w/ buggy _BQC. | |
594 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
595 | */ | |
c60d638e ZR |
596 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
597 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
598 | } |
599 | } | |
600 | ||
4500ca8e | 601 | *level = device->brightness->curr; |
c8890f90 | 602 | return 0; |
1da177e4 LT |
603 | } |
604 | ||
605 | static int | |
4be44fcd LB |
606 | acpi_video_device_EDID(struct acpi_video_device *device, |
607 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 608 | { |
4be44fcd LB |
609 | int status; |
610 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
611 | union acpi_object *obj; | |
612 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
613 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 614 | |
1da177e4 LT |
615 | |
616 | *edid = NULL; | |
617 | ||
618 | if (!device) | |
d550d98d | 619 | return -ENODEV; |
1da177e4 LT |
620 | if (length == 128) |
621 | arg0.integer.value = 1; | |
622 | else if (length == 256) | |
623 | arg0.integer.value = 2; | |
624 | else | |
d550d98d | 625 | return -EINVAL; |
1da177e4 | 626 | |
90130268 | 627 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 628 | if (ACPI_FAILURE(status)) |
d550d98d | 629 | return -ENODEV; |
1da177e4 | 630 | |
50dd0969 | 631 | obj = buffer.pointer; |
1da177e4 LT |
632 | |
633 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
634 | *edid = obj; | |
635 | else { | |
6468463a | 636 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
637 | status = -EFAULT; |
638 | kfree(obj); | |
639 | } | |
640 | ||
d550d98d | 641 | return status; |
1da177e4 LT |
642 | } |
643 | ||
1da177e4 LT |
644 | /* bus */ |
645 | ||
1da177e4 LT |
646 | /* |
647 | * Arg: | |
21fcb34e FC |
648 | * video : video bus device pointer |
649 | * bios_flag : | |
1da177e4 LT |
650 | * 0. The system BIOS should NOT automatically switch(toggle) |
651 | * the active display output. | |
652 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 653 | * active display output. No switch event. |
1da177e4 LT |
654 | * 2. The _DGS value should be locked. |
655 | * 3. The system BIOS should not automatically switch (toggle) the | |
656 | * active display output, but instead generate the display switch | |
657 | * event notify code. | |
658 | * lcd_flag : | |
659 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 660 | * of the LCD when the power changes from AC to DC |
21fcb34e | 661 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 662 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 663 | * Return Value: |
ea9f8856 | 664 | * -EINVAL wrong arg. |
1da177e4 LT |
665 | */ |
666 | ||
667 | static int | |
4be44fcd | 668 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 669 | { |
ea9f8856 | 670 | acpi_status status; |
1da177e4 | 671 | |
b0373843 ZR |
672 | if (!video->cap._DOS) |
673 | return 0; | |
1da177e4 | 674 | |
ea9f8856 IM |
675 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
676 | return -EINVAL; | |
0db98202 JL |
677 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
678 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
679 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
680 | if (ACPI_FAILURE(status)) |
681 | return -EIO; | |
1da177e4 | 682 | |
ea9f8856 | 683 | return 0; |
1da177e4 LT |
684 | } |
685 | ||
935e5f29 ZR |
686 | /* |
687 | * Simple comparison function used to sort backlight levels. | |
688 | */ | |
689 | ||
690 | static int | |
691 | acpi_video_cmp_level(const void *a, const void *b) | |
692 | { | |
693 | return *(int *)a - *(int *)b; | |
694 | } | |
695 | ||
a50188da AL |
696 | /* |
697 | * Decides if _BQC/_BCQ for this system is usable | |
698 | * | |
699 | * We do this by changing the level first and then read out the current | |
700 | * brightness level, if the value does not match, find out if it is using | |
701 | * index. If not, clear the _BQC/_BCQ capability. | |
702 | */ | |
703 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
704 | int max_level, int current_level) | |
705 | { | |
706 | struct acpi_video_device_brightness *br = device->brightness; | |
707 | int result; | |
708 | unsigned long long level; | |
709 | int test_level; | |
710 | ||
711 | /* don't mess with existing known broken systems */ | |
712 | if (bqc_offset_aml_bug_workaround) | |
713 | return 0; | |
714 | ||
715 | /* | |
716 | * Some systems always report current brightness level as maximum | |
717 | * through _BQC, we need to test another value for them. | |
718 | */ | |
b3b301c5 | 719 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
720 | |
721 | result = acpi_video_device_lcd_set_level(device, test_level); | |
722 | if (result) | |
723 | return result; | |
724 | ||
725 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
726 | if (result) | |
727 | return result; | |
728 | ||
729 | if (level != test_level) { | |
730 | /* buggy _BQC found, need to find out if it uses index */ | |
731 | if (level < br->count) { | |
732 | if (br->flags._BCL_reversed) | |
733 | level = br->count - 3 - level; | |
734 | if (br->levels[level + 2] == test_level) | |
735 | br->flags._BQC_use_index = 1; | |
736 | } | |
737 | ||
738 | if (!br->flags._BQC_use_index) | |
739 | device->cap._BQC = device->cap._BCQ = 0; | |
740 | } | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
05950094 | 745 | int acpi_video_get_levels(struct acpi_device *device, |
9f9cd7ee AL |
746 | struct acpi_video_device_brightness **dev_br, |
747 | int *pmax_level) | |
469778c1 JJ |
748 | { |
749 | union acpi_object *obj = NULL; | |
d32f6947 | 750 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
469778c1 JJ |
751 | union acpi_object *o; |
752 | struct acpi_video_device_brightness *br = NULL; | |
05950094 | 753 | int result = 0; |
bd8ba205 | 754 | u32 value; |
469778c1 | 755 | |
05950094 AL |
756 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device->handle, |
757 | &obj))) { | |
469778c1 JJ |
758 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " |
759 | "LCD brightness level\n")); | |
05950094 | 760 | result = -ENODEV; |
469778c1 JJ |
761 | goto out; |
762 | } | |
763 | ||
05950094 AL |
764 | if (obj->package.count < 2) { |
765 | result = -EINVAL; | |
469778c1 | 766 | goto out; |
05950094 | 767 | } |
469778c1 JJ |
768 | |
769 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
770 | if (!br) { | |
771 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 772 | result = -ENOMEM; |
469778c1 JJ |
773 | goto out; |
774 | } | |
775 | ||
d32f6947 | 776 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 777 | GFP_KERNEL); |
1a7c618a ZR |
778 | if (!br->levels) { |
779 | result = -ENOMEM; | |
469778c1 | 780 | goto out_free; |
1a7c618a | 781 | } |
469778c1 JJ |
782 | |
783 | for (i = 0; i < obj->package.count; i++) { | |
784 | o = (union acpi_object *)&obj->package.elements[i]; | |
785 | if (o->type != ACPI_TYPE_INTEGER) { | |
786 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
787 | continue; | |
788 | } | |
bd8ba205 HG |
789 | value = (u32) o->integer.value; |
790 | /* Skip duplicate entries */ | |
791 | if (count > 2 && br->levels[count - 1] == value) | |
792 | continue; | |
793 | ||
794 | br->levels[count] = value; | |
469778c1 JJ |
795 | |
796 | if (br->levels[count] > max_level) | |
797 | max_level = br->levels[count]; | |
798 | count++; | |
799 | } | |
800 | ||
d32f6947 ZR |
801 | /* |
802 | * some buggy BIOS don't export the levels | |
803 | * when machine is on AC/Battery in _BCL package. | |
804 | * In this case, the first two elements in _BCL packages | |
805 | * are also supported brightness levels that OS should take care of. | |
806 | */ | |
90af2cf6 ZR |
807 | for (i = 2; i < count; i++) { |
808 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 809 | level_ac_battery++; |
90af2cf6 ZR |
810 | if (br->levels[i] == br->levels[1]) |
811 | level_ac_battery++; | |
812 | } | |
d32f6947 ZR |
813 | |
814 | if (level_ac_battery < 2) { | |
815 | level_ac_battery = 2 - level_ac_battery; | |
816 | br->flags._BCL_no_ac_battery_levels = 1; | |
817 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
818 | br->levels[i] = br->levels[i - level_ac_battery]; | |
819 | count += level_ac_battery; | |
820 | } else if (level_ac_battery > 2) | |
bf6787eb | 821 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 822 | |
d80fb99f ZR |
823 | /* Check if the _BCL package is in a reversed order */ |
824 | if (max_level == br->levels[2]) { | |
825 | br->flags._BCL_reversed = 1; | |
826 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
827 | acpi_video_cmp_level, NULL); | |
828 | } else if (max_level != br->levels[count - 1]) | |
829 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 830 | "Found unordered _BCL package")); |
469778c1 JJ |
831 | |
832 | br->count = count; | |
05950094 | 833 | *dev_br = br; |
9f9cd7ee AL |
834 | if (pmax_level) |
835 | *pmax_level = max_level; | |
05950094 AL |
836 | |
837 | out: | |
838 | kfree(obj); | |
839 | return result; | |
840 | out_free: | |
841 | kfree(br); | |
842 | goto out; | |
843 | } | |
844 | EXPORT_SYMBOL(acpi_video_get_levels); | |
845 | ||
846 | /* | |
847 | * Arg: | |
848 | * device : video output device (LCD, CRT, ..) | |
849 | * | |
850 | * Return Value: | |
851 | * Maximum brightness level | |
852 | * | |
853 | * Allocate and initialize device->brightness. | |
854 | */ | |
855 | ||
856 | static int | |
857 | acpi_video_init_brightness(struct acpi_video_device *device) | |
858 | { | |
859 | int i, max_level = 0; | |
860 | unsigned long long level, level_old; | |
861 | struct acpi_video_device_brightness *br = NULL; | |
862 | int result = -EINVAL; | |
863 | ||
9f9cd7ee | 864 | result = acpi_video_get_levels(device->dev, &br, &max_level); |
05950094 AL |
865 | if (result) |
866 | return result; | |
469778c1 | 867 | device->brightness = br; |
1a7c618a | 868 | |
1a7c618a | 869 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 870 | br->curr = level = max_level; |
e047cca6 ZR |
871 | |
872 | if (!device->cap._BQC) | |
873 | goto set_level; | |
874 | ||
a89803df DB |
875 | result = acpi_video_device_lcd_get_level_current(device, |
876 | &level_old, true); | |
1a7c618a ZR |
877 | if (result) |
878 | goto out_free_levels; | |
879 | ||
a50188da | 880 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
881 | if (result) |
882 | goto out_free_levels; | |
a50188da AL |
883 | /* |
884 | * cap._BQC may get cleared due to _BQC is found to be broken | |
885 | * in acpi_video_bqc_quirk, so check again here. | |
886 | */ | |
887 | if (!device->cap._BQC) | |
888 | goto set_level; | |
e047cca6 | 889 | |
545ef368 AL |
890 | level = acpi_video_bqc_value_to_level(device, level_old); |
891 | /* | |
892 | * On some buggy laptops, _BQC returns an uninitialized | |
893 | * value when invoked for the first time, i.e. | |
894 | * level_old is invalid (no matter whether it's a level | |
895 | * or an index). Set the backlight to max_level in this case. | |
896 | */ | |
897 | for (i = 2; i < br->count; i++) | |
898 | if (level == br->levels[i]) | |
899 | break; | |
900 | if (i == br->count || !level) | |
901 | level = max_level; | |
e047cca6 | 902 | |
e047cca6 | 903 | set_level: |
90c53ca4 | 904 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
905 | if (result) |
906 | goto out_free_levels; | |
1a7c618a | 907 | |
d32f6947 | 908 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05950094 AL |
909 | "found %d brightness levels\n", br->count - 2)); |
910 | return 0; | |
469778c1 JJ |
911 | |
912 | out_free_levels: | |
913 | kfree(br->levels); | |
469778c1 | 914 | kfree(br); |
469778c1 | 915 | device->brightness = NULL; |
1a7c618a | 916 | return result; |
469778c1 JJ |
917 | } |
918 | ||
919 | /* | |
920 | * Arg: | |
921 | * device : video output device (LCD, CRT, ..) | |
922 | * | |
923 | * Return Value: | |
21fcb34e | 924 | * None |
1da177e4 | 925 | * |
98fb8fe1 | 926 | * Find out all required AML methods defined under the output |
1da177e4 LT |
927 | * device. |
928 | */ | |
929 | ||
4be44fcd | 930 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 931 | { |
952c63e9 | 932 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 933 | device->cap._ADR = 1; |
952c63e9 | 934 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 935 | device->cap._BCL = 1; |
952c63e9 | 936 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 937 | device->cap._BCM = 1; |
952c63e9 | 938 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 939 | device->cap._BQC = 1; |
952c63e9 | 940 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
941 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
942 | device->cap._BCQ = 1; | |
943 | } | |
944 | ||
952c63e9 | 945 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 946 | device->cap._DDC = 1; |
1da177e4 LT |
947 | } |
948 | ||
949 | /* | |
21fcb34e FC |
950 | * Arg: |
951 | * device : video output device (VGA) | |
1da177e4 LT |
952 | * |
953 | * Return Value: | |
21fcb34e | 954 | * None |
1da177e4 | 955 | * |
98fb8fe1 | 956 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
957 | */ |
958 | ||
4be44fcd | 959 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 960 | { |
952c63e9 | 961 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 962 | video->cap._DOS = 1; |
952c63e9 | 963 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 964 | video->cap._DOD = 1; |
952c63e9 | 965 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 966 | video->cap._ROM = 1; |
952c63e9 | 967 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 968 | video->cap._GPD = 1; |
952c63e9 | 969 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 970 | video->cap._SPD = 1; |
952c63e9 | 971 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 972 | video->cap._VPO = 1; |
1da177e4 LT |
973 | } |
974 | ||
975 | /* | |
976 | * Check whether the video bus device has required AML method to | |
977 | * support the desired features | |
978 | */ | |
979 | ||
4be44fcd | 980 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 981 | { |
4be44fcd | 982 | acpi_status status = -ENOENT; |
1e4cffe7 | 983 | struct pci_dev *dev; |
1da177e4 LT |
984 | |
985 | if (!video) | |
d550d98d | 986 | return -EINVAL; |
1da177e4 | 987 | |
1e4cffe7 | 988 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
989 | if (!dev) |
990 | return -ENODEV; | |
1e4cffe7 | 991 | pci_dev_put(dev); |
22c13f9d | 992 | |
21fcb34e FC |
993 | /* |
994 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
995 | * to check well known required nodes. |
996 | */ | |
997 | ||
98fb8fe1 | 998 | /* Does this device support video switching? */ |
3a1151e3 SB |
999 | if (video->cap._DOS || video->cap._DOD) { |
1000 | if (!video->cap._DOS) { | |
1001 | printk(KERN_WARNING FW_BUG | |
1002 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1003 | acpi_device_bid(video->device)); | |
1004 | } | |
1da177e4 LT |
1005 | video->flags.multihead = 1; |
1006 | status = 0; | |
1007 | } | |
1008 | ||
98fb8fe1 | 1009 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1010 | if (video->cap._ROM) { |
1da177e4 LT |
1011 | video->flags.rom = 1; |
1012 | status = 0; | |
1013 | } | |
1014 | ||
98fb8fe1 | 1015 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1016 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1017 | video->flags.post = 1; |
1018 | status = 0; | |
1019 | } | |
1020 | ||
d550d98d | 1021 | return status; |
1da177e4 LT |
1022 | } |
1023 | ||
21fcb34e FC |
1024 | /* |
1025 | * -------------------------------------------------------------------------- | |
1026 | * Driver Interface | |
1027 | * -------------------------------------------------------------------------- | |
1028 | */ | |
1da177e4 LT |
1029 | |
1030 | /* device interface */ | |
915ea7e4 | 1031 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1032 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1033 | { | |
78eed028 DT |
1034 | struct acpi_video_enumerated_device *ids; |
1035 | int i; | |
1036 | ||
1037 | for (i = 0; i < video->attached_count; i++) { | |
1038 | ids = &video->attached_array[i]; | |
1039 | if ((ids->value.int_val & 0xffff) == device_id) | |
1040 | return &ids->value.attrib; | |
1041 | } | |
82cae999 | 1042 | |
82cae999 RZ |
1043 | return NULL; |
1044 | } | |
1da177e4 | 1045 | |
e92a7162 MG |
1046 | static int |
1047 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1048 | unsigned long device_id) | |
1049 | { | |
1050 | struct acpi_video_enumerated_device *ids; | |
1051 | int i; | |
1052 | ||
1053 | for (i = 0; i < video->attached_count; i++) { | |
1054 | ids = &video->attached_array[i]; | |
1055 | if ((ids->value.int_val & 0xffff) == device_id) | |
1056 | return ids->value.int_val; | |
1057 | } | |
1058 | ||
1059 | return 0; | |
1060 | } | |
1061 | ||
1da177e4 | 1062 | static int |
4be44fcd LB |
1063 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1064 | struct acpi_video_bus *video) | |
1da177e4 | 1065 | { |
27663c58 | 1066 | unsigned long long device_id; |
e92a7162 | 1067 | int status, device_type; |
4be44fcd | 1068 | struct acpi_video_device *data; |
915ea7e4 | 1069 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1070 | |
4be44fcd LB |
1071 | status = |
1072 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1073 | /* Some device omits _ADR, we skip them instead of fail */ |
1074 | if (ACPI_FAILURE(status)) | |
1075 | return 0; | |
1da177e4 | 1076 | |
91e13aa3 AL |
1077 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1078 | if (!data) | |
1079 | return -ENOMEM; | |
82cae999 | 1080 | |
91e13aa3 AL |
1081 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1082 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1083 | device->driver_data = data; | |
1084 | ||
1085 | data->device_id = device_id; | |
1086 | data->video = video; | |
1087 | data->dev = device; | |
8ab58e8e LT |
1088 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1089 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1090 | |
1091 | attribute = acpi_video_get_device_attr(video, device_id); | |
1092 | ||
e50b9be1 | 1093 | if (attribute && (attribute->device_id_scheme || device_id_scheme)) { |
91e13aa3 AL |
1094 | switch (attribute->display_type) { |
1095 | case ACPI_VIDEO_DISPLAY_CRT: | |
1096 | data->flags.crt = 1; | |
1097 | break; | |
1098 | case ACPI_VIDEO_DISPLAY_TV: | |
1099 | data->flags.tvout = 1; | |
1100 | break; | |
1101 | case ACPI_VIDEO_DISPLAY_DVI: | |
1102 | data->flags.dvi = 1; | |
1103 | break; | |
1104 | case ACPI_VIDEO_DISPLAY_LCD: | |
1105 | data->flags.lcd = 1; | |
1106 | break; | |
1107 | default: | |
1108 | data->flags.unknown = 1; | |
1109 | break; | |
1110 | } | |
915ea7e4 | 1111 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1112 | data->flags.bios = 1; |
1113 | } else { | |
1114 | /* Check for legacy IDs */ | |
1115 | device_type = acpi_video_get_device_type(video, device_id); | |
1116 | /* Ignore bits 16 and 18-20 */ | |
1117 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1118 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1119 | data->flags.crt = 1; | |
1120 | break; | |
1121 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1122 | data->flags.lcd = 1; | |
1123 | break; | |
1124 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1125 | data->flags.tvout = 1; | |
1126 | break; | |
1127 | default: | |
1128 | data->flags.unknown = 1; | |
e92a7162 | 1129 | } |
91e13aa3 | 1130 | } |
4be44fcd | 1131 | |
91e13aa3 AL |
1132 | acpi_video_device_bind(video, data); |
1133 | acpi_video_device_find_cap(data); | |
1da177e4 | 1134 | |
91e13aa3 AL |
1135 | mutex_lock(&video->device_list_lock); |
1136 | list_add_tail(&data->entry, &video->video_device_list); | |
1137 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1138 | |
91e13aa3 | 1139 | return status; |
1da177e4 LT |
1140 | } |
1141 | ||
1142 | /* | |
1143 | * Arg: | |
21fcb34e | 1144 | * video : video bus device |
1da177e4 LT |
1145 | * |
1146 | * Return: | |
21fcb34e FC |
1147 | * none |
1148 | * | |
1149 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1150 | * bind the ids with the corresponding video devices |
1151 | * under the video bus. | |
4be44fcd | 1152 | */ |
1da177e4 | 1153 | |
4be44fcd | 1154 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1155 | { |
ff102ea9 DT |
1156 | struct acpi_video_device *dev; |
1157 | ||
bbac81f5 | 1158 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1159 | |
1160 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1161 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1162 | |
bbac81f5 | 1163 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1164 | } |
1165 | ||
1166 | /* | |
1167 | * Arg: | |
21fcb34e FC |
1168 | * video : video bus device |
1169 | * device : video output device under the video | |
1170 | * bus | |
1da177e4 LT |
1171 | * |
1172 | * Return: | |
21fcb34e FC |
1173 | * none |
1174 | * | |
1da177e4 LT |
1175 | * Bind the ids with the corresponding video devices |
1176 | * under the video bus. | |
4be44fcd | 1177 | */ |
1da177e4 LT |
1178 | |
1179 | static void | |
4be44fcd LB |
1180 | acpi_video_device_bind(struct acpi_video_bus *video, |
1181 | struct acpi_video_device *device) | |
1da177e4 | 1182 | { |
78eed028 | 1183 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1184 | int i; |
1da177e4 | 1185 | |
78eed028 DT |
1186 | for (i = 0; i < video->attached_count; i++) { |
1187 | ids = &video->attached_array[i]; | |
1188 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1189 | ids->bind_info = device; | |
1da177e4 LT |
1190 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1191 | } | |
1192 | } | |
1da177e4 LT |
1193 | } |
1194 | ||
0b8db271 AL |
1195 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1196 | { | |
1197 | struct acpi_video_bus *video = device->video; | |
1198 | int i; | |
1199 | ||
b4df4636 AL |
1200 | /* |
1201 | * If we have a broken _DOD or we have more than 8 output devices | |
1202 | * under the graphics controller node that we can't proper deal with | |
1203 | * in the operation region code currently, no need to test. | |
1204 | */ | |
1205 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1206 | return true; |
1207 | ||
1208 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1209 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1210 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1211 | return true; |
1212 | } | |
1213 | ||
1214 | return false; | |
1215 | } | |
1216 | ||
1da177e4 LT |
1217 | /* |
1218 | * Arg: | |
21fcb34e | 1219 | * video : video bus device |
1da177e4 LT |
1220 | * |
1221 | * Return: | |
21fcb34e FC |
1222 | * < 0 : error |
1223 | * | |
1da177e4 LT |
1224 | * Call _DOD to enumerate all devices attached to display adapter |
1225 | * | |
4be44fcd | 1226 | */ |
1da177e4 LT |
1227 | |
1228 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1229 | { | |
4be44fcd LB |
1230 | int status; |
1231 | int count; | |
1232 | int i; | |
78eed028 | 1233 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1234 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1235 | union acpi_object *dod = NULL; | |
1236 | union acpi_object *obj; | |
1da177e4 | 1237 | |
e34fbbac AH |
1238 | if (!video->cap._DOD) |
1239 | return AE_NOT_EXIST; | |
1240 | ||
90130268 | 1241 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1242 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1243 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1244 | return status; |
1da177e4 LT |
1245 | } |
1246 | ||
50dd0969 | 1247 | dod = buffer.pointer; |
1da177e4 | 1248 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1249 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1250 | status = -EFAULT; |
1251 | goto out; | |
1252 | } | |
1253 | ||
1254 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1255 | dod->package.count)); |
1da177e4 | 1256 | |
78eed028 DT |
1257 | active_list = kcalloc(1 + dod->package.count, |
1258 | sizeof(struct acpi_video_enumerated_device), | |
1259 | GFP_KERNEL); | |
1260 | if (!active_list) { | |
1da177e4 LT |
1261 | status = -ENOMEM; |
1262 | goto out; | |
1263 | } | |
1264 | ||
1265 | count = 0; | |
1266 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1267 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1268 | |
1269 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1270 | printk(KERN_ERR PREFIX |
1271 | "Invalid _DOD data in element %d\n", i); | |
1272 | continue; | |
1da177e4 | 1273 | } |
78eed028 DT |
1274 | |
1275 | active_list[count].value.int_val = obj->integer.value; | |
1276 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1277 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1278 | (int)obj->integer.value)); | |
1da177e4 LT |
1279 | count++; |
1280 | } | |
1da177e4 | 1281 | |
6044ec88 | 1282 | kfree(video->attached_array); |
4be44fcd | 1283 | |
78eed028 | 1284 | video->attached_array = active_list; |
1da177e4 | 1285 | video->attached_count = count; |
78eed028 | 1286 | |
915ea7e4 | 1287 | out: |
02438d87 | 1288 | kfree(buffer.pointer); |
d550d98d | 1289 | return status; |
1da177e4 LT |
1290 | } |
1291 | ||
4be44fcd LB |
1292 | static int |
1293 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1294 | u32 level_current, u32 event) | |
1da177e4 | 1295 | { |
63f0edfc | 1296 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1297 | max = max_below = 0; |
1298 | min = min_above = 255; | |
63f0edfc | 1299 | /* Find closest level to level_current */ |
0a3db1ce | 1300 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1301 | l = device->brightness->levels[i]; |
1302 | if (abs(l - level_current) < abs(delta)) { | |
1303 | delta = l - level_current; | |
1304 | if (!delta) | |
1305 | break; | |
1306 | } | |
1307 | } | |
1308 | /* Ajust level_current to closest available level */ | |
1309 | level_current += delta; | |
0a3db1ce | 1310 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1311 | l = device->brightness->levels[i]; |
1312 | if (l < min) | |
1313 | min = l; | |
1314 | if (l > max) | |
1315 | max = l; | |
1316 | if (l < min_above && l > level_current) | |
1317 | min_above = l; | |
1318 | if (l > max_below && l < level_current) | |
1319 | max_below = l; | |
1320 | } | |
1321 | ||
1322 | switch (event) { | |
1323 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1324 | return (level_current < max) ? min_above : min; | |
1325 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1326 | return (level_current < max) ? min_above : max; | |
1327 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1328 | return (level_current > min) ? max_below : min; | |
1329 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1330 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1331 | return 0; | |
1332 | default: | |
1333 | return level_current; | |
1334 | } | |
1da177e4 LT |
1335 | } |
1336 | ||
8ab58e8e LT |
1337 | static void |
1338 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1339 | { |
8ab58e8e LT |
1340 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1341 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1342 | unsigned long long level_current, level_next; |
8ab58e8e | 1343 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1344 | int result = -EINVAL; |
1345 | ||
fbc9fe1b | 1346 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
654a182d | 1347 | if (!device->backlight) |
8ab58e8e | 1348 | return; |
28c32e99 | 1349 | |
469778c1 | 1350 | if (!device->brightness) |
c8890f90 ZR |
1351 | goto out; |
1352 | ||
1353 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1354 | &level_current, |
1355 | false); | |
c8890f90 ZR |
1356 | if (result) |
1357 | goto out; | |
1358 | ||
1da177e4 | 1359 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1360 | |
24450c7a | 1361 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1362 | |
36342742 MG |
1363 | if (!result) |
1364 | backlight_force_update(device->backlight, | |
1365 | BACKLIGHT_UPDATE_HOTKEY); | |
1366 | ||
c8890f90 ZR |
1367 | out: |
1368 | if (result) | |
1369 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1370 | } |
1371 | ||
e92a7162 MG |
1372 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1373 | void **edid) | |
1374 | { | |
1375 | struct acpi_video_bus *video; | |
1376 | struct acpi_video_device *video_device; | |
1377 | union acpi_object *buffer = NULL; | |
1378 | acpi_status status; | |
1379 | int i, length; | |
1380 | ||
1381 | if (!device || !acpi_driver_data(device)) | |
1382 | return -EINVAL; | |
1383 | ||
1384 | video = acpi_driver_data(device); | |
1385 | ||
1386 | for (i = 0; i < video->attached_count; i++) { | |
1387 | video_device = video->attached_array[i].bind_info; | |
1388 | length = 256; | |
1389 | ||
1390 | if (!video_device) | |
1391 | continue; | |
1392 | ||
82069552 ZR |
1393 | if (!video_device->cap._DDC) |
1394 | continue; | |
1395 | ||
e92a7162 MG |
1396 | if (type) { |
1397 | switch (type) { | |
1398 | case ACPI_VIDEO_DISPLAY_CRT: | |
1399 | if (!video_device->flags.crt) | |
1400 | continue; | |
1401 | break; | |
1402 | case ACPI_VIDEO_DISPLAY_TV: | |
1403 | if (!video_device->flags.tvout) | |
1404 | continue; | |
1405 | break; | |
1406 | case ACPI_VIDEO_DISPLAY_DVI: | |
1407 | if (!video_device->flags.dvi) | |
1408 | continue; | |
1409 | break; | |
1410 | case ACPI_VIDEO_DISPLAY_LCD: | |
1411 | if (!video_device->flags.lcd) | |
1412 | continue; | |
1413 | break; | |
1414 | } | |
1415 | } else if (video_device->device_id != device_id) { | |
1416 | continue; | |
1417 | } | |
1418 | ||
1419 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1420 | ||
1421 | if (ACPI_FAILURE(status) || !buffer || | |
1422 | buffer->type != ACPI_TYPE_BUFFER) { | |
1423 | length = 128; | |
1424 | status = acpi_video_device_EDID(video_device, &buffer, | |
1425 | length); | |
1426 | if (ACPI_FAILURE(status) || !buffer || | |
1427 | buffer->type != ACPI_TYPE_BUFFER) { | |
1428 | continue; | |
1429 | } | |
1430 | } | |
1431 | ||
1432 | *edid = buffer->buffer.pointer; | |
1433 | return length; | |
1434 | } | |
1435 | ||
1436 | return -ENODEV; | |
1437 | } | |
1438 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1439 | ||
1da177e4 | 1440 | static int |
4be44fcd LB |
1441 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1442 | struct acpi_device *device) | |
1da177e4 | 1443 | { |
fba4e087 | 1444 | int status = 0; |
ff102ea9 | 1445 | struct acpi_device *dev; |
1da177e4 | 1446 | |
fba4e087 IM |
1447 | /* |
1448 | * There are systems where video module known to work fine regardless | |
1449 | * of broken _DOD and ignoring returned value here doesn't cause | |
1450 | * any issues later. | |
1451 | */ | |
1452 | acpi_video_device_enumerate(video); | |
1da177e4 | 1453 | |
ff102ea9 | 1454 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1455 | |
1456 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1457 | if (status) { |
91e13aa3 AL |
1458 | dev_err(&dev->dev, "Can't attach device\n"); |
1459 | break; | |
1da177e4 | 1460 | } |
b4df4636 | 1461 | video->child_count++; |
1da177e4 | 1462 | } |
d550d98d | 1463 | return status; |
1da177e4 LT |
1464 | } |
1465 | ||
1da177e4 LT |
1466 | /* acpi_video interface */ |
1467 | ||
efaa14c7 AL |
1468 | /* |
1469 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1470 | * preform any automatic brightness change on receiving a notification. | |
1471 | */ | |
4be44fcd | 1472 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1473 | { |
efaa14c7 | 1474 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1475 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1476 | } |
1477 | ||
4be44fcd | 1478 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1479 | { |
efaa14c7 | 1480 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1481 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1482 | } |
1483 | ||
7015558f | 1484 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1485 | { |
7015558f | 1486 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1487 | struct input_dev *input; |
17c452f9 | 1488 | int keycode = 0; |
e9dab196 | 1489 | |
67b662e1 | 1490 | if (!video || !video->input) |
d550d98d | 1491 | return; |
1da177e4 | 1492 | |
e9dab196 | 1493 | input = video->input; |
1da177e4 LT |
1494 | |
1495 | switch (event) { | |
98fb8fe1 | 1496 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1497 | * most likely via hotkey. */ |
8a37c65d | 1498 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1499 | break; |
1500 | ||
98fb8fe1 | 1501 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1502 | * connector. */ |
1503 | acpi_video_device_enumerate(video); | |
1504 | acpi_video_device_rebind(video); | |
e9dab196 | 1505 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1506 | break; |
1507 | ||
4be44fcd | 1508 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1509 | keycode = KEY_SWITCHVIDEOMODE; |
1510 | break; | |
4be44fcd | 1511 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1512 | keycode = KEY_VIDEO_NEXT; |
1513 | break; | |
4be44fcd | 1514 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1515 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1516 | break; |
1517 | ||
1518 | default: | |
1519 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1520 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1521 | break; |
1522 | } | |
1523 | ||
8a37c65d LT |
1524 | if (acpi_notifier_call_chain(device, event, 0)) |
1525 | /* Something vetoed the keypress. */ | |
1526 | keycode = 0; | |
17c452f9 | 1527 | |
05bc59a0 | 1528 | if (keycode && (report_key_events & REPORT_OUTPUT_KEY_EVENTS)) { |
17c452f9 MG |
1529 | input_report_key(input, keycode, 1); |
1530 | input_sync(input); | |
1531 | input_report_key(input, keycode, 0); | |
1532 | input_sync(input); | |
1533 | } | |
e9dab196 | 1534 | |
d550d98d | 1535 | return; |
1da177e4 LT |
1536 | } |
1537 | ||
8ab58e8e LT |
1538 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1539 | u32 event) | |
1540 | { | |
1541 | if (!brightness_switch_enabled) | |
1542 | return; | |
1543 | ||
1544 | video_device->switch_brightness_event = event; | |
1545 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1546 | } | |
1547 | ||
4be44fcd | 1548 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1549 | { |
50dd0969 | 1550 | struct acpi_video_device *video_device = data; |
4be44fcd | 1551 | struct acpi_device *device = NULL; |
e9dab196 LY |
1552 | struct acpi_video_bus *bus; |
1553 | struct input_dev *input; | |
17c452f9 | 1554 | int keycode = 0; |
1da177e4 | 1555 | |
1da177e4 | 1556 | if (!video_device) |
d550d98d | 1557 | return; |
1da177e4 | 1558 | |
e6afa0de | 1559 | device = video_device->dev; |
e9dab196 LY |
1560 | bus = video_device->video; |
1561 | input = bus->input; | |
1da177e4 LT |
1562 | |
1563 | switch (event) { | |
4be44fcd | 1564 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1565 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1566 | keycode = KEY_BRIGHTNESS_CYCLE; |
1567 | break; | |
4be44fcd | 1568 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1569 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1570 | keycode = KEY_BRIGHTNESSUP; |
1571 | break; | |
4be44fcd | 1572 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1573 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1574 | keycode = KEY_BRIGHTNESSDOWN; |
1575 | break; | |
70f23fd6 | 1576 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1577 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1578 | keycode = KEY_BRIGHTNESS_ZERO; |
1579 | break; | |
4be44fcd | 1580 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1581 | brightness_switch_event(video_device, event); |
e9dab196 | 1582 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1583 | break; |
1584 | default: | |
1585 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1586 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1587 | break; |
1588 | } | |
e9dab196 | 1589 | |
7761f638 | 1590 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 | 1591 | |
05bc59a0 | 1592 | if (keycode && (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS)) { |
17c452f9 MG |
1593 | input_report_key(input, keycode, 1); |
1594 | input_sync(input); | |
1595 | input_report_key(input, keycode, 0); | |
1596 | input_sync(input); | |
1597 | } | |
e9dab196 | 1598 | |
d550d98d | 1599 | return; |
1da177e4 LT |
1600 | } |
1601 | ||
ac7729da RW |
1602 | static int acpi_video_resume(struct notifier_block *nb, |
1603 | unsigned long val, void *ign) | |
863c1490 MG |
1604 | { |
1605 | struct acpi_video_bus *video; | |
1606 | struct acpi_video_device *video_device; | |
1607 | int i; | |
1608 | ||
ac7729da RW |
1609 | switch (val) { |
1610 | case PM_HIBERNATION_PREPARE: | |
1611 | case PM_SUSPEND_PREPARE: | |
1612 | case PM_RESTORE_PREPARE: | |
1613 | return NOTIFY_DONE; | |
1614 | } | |
863c1490 | 1615 | |
ac7729da RW |
1616 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1617 | ||
1618 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1619 | |
1620 | for (i = 0; i < video->attached_count; i++) { | |
1621 | video_device = video->attached_array[i].bind_info; | |
654a182d HG |
1622 | if (video_device && video_device->brightness) |
1623 | acpi_video_device_lcd_set_level(video_device, | |
1624 | video_device->brightness->curr); | |
863c1490 | 1625 | } |
ac7729da RW |
1626 | |
1627 | return NOTIFY_OK; | |
863c1490 MG |
1628 | } |
1629 | ||
c504f8cb ZR |
1630 | static acpi_status |
1631 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1632 | void **return_value) | |
1633 | { | |
1634 | struct acpi_device *device = context; | |
1635 | struct acpi_device *sibling; | |
1636 | int result; | |
1637 | ||
1638 | if (handle == device->handle) | |
1639 | return AE_CTRL_TERMINATE; | |
1640 | ||
1641 | result = acpi_bus_get_device(handle, &sibling); | |
1642 | if (result) | |
1643 | return AE_OK; | |
1644 | ||
1645 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1646 | return AE_ALREADY_EXISTS; | |
1647 | ||
1648 | return AE_OK; | |
1649 | } | |
1650 | ||
67b662e1 AL |
1651 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1652 | { | |
99678ed7 HG |
1653 | struct backlight_properties props; |
1654 | struct pci_dev *pdev; | |
1655 | acpi_handle acpi_parent; | |
1656 | struct device *parent = NULL; | |
1657 | int result; | |
1658 | static int count; | |
1659 | char *name; | |
67b662e1 | 1660 | |
99678ed7 HG |
1661 | result = acpi_video_init_brightness(device); |
1662 | if (result) | |
1663 | return; | |
654a182d HG |
1664 | |
1665 | if (disable_backlight_sysfs_if > 0) | |
1666 | return; | |
1667 | ||
99678ed7 HG |
1668 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
1669 | if (!name) | |
1670 | return; | |
1671 | count++; | |
67b662e1 | 1672 | |
99678ed7 | 1673 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1674 | |
99678ed7 HG |
1675 | pdev = acpi_get_pci_dev(acpi_parent); |
1676 | if (pdev) { | |
1677 | parent = &pdev->dev; | |
1678 | pci_dev_put(pdev); | |
1679 | } | |
67b662e1 | 1680 | |
99678ed7 HG |
1681 | memset(&props, 0, sizeof(struct backlight_properties)); |
1682 | props.type = BACKLIGHT_FIRMWARE; | |
1683 | props.max_brightness = device->brightness->count - 3; | |
1684 | device->backlight = backlight_device_register(name, | |
1685 | parent, | |
1686 | device, | |
1687 | &acpi_backlight_ops, | |
1688 | &props); | |
1689 | kfree(name); | |
654a182d HG |
1690 | if (IS_ERR(device->backlight)) { |
1691 | device->backlight = NULL; | |
99678ed7 | 1692 | return; |
654a182d | 1693 | } |
67b662e1 | 1694 | |
99678ed7 HG |
1695 | /* |
1696 | * Save current brightness level in case we have to restore it | |
1697 | * before acpi_video_device_lcd_set_level() is called next time. | |
1698 | */ | |
1699 | device->backlight->props.brightness = | |
1700 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1701 | |
99678ed7 HG |
1702 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1703 | device->dev, &video_cooling_ops); | |
1704 | if (IS_ERR(device->cooling_dev)) { | |
1705 | /* | |
1706 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1707 | * Also, why the hell we are returning early and not attempt to | |
1708 | * register video output if cooling device registration failed? | |
1709 | * -- dtor | |
1710 | */ | |
1711 | device->cooling_dev = NULL; | |
1712 | return; | |
67b662e1 | 1713 | } |
99678ed7 HG |
1714 | |
1715 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1716 | device->cooling_dev->id); | |
1717 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1718 | &device->cooling_dev->device.kobj, | |
1719 | "thermal_cooling"); | |
1720 | if (result) | |
1721 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1722 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1723 | &device->dev->dev.kobj, "device"); | |
1724 | if (result) | |
1725 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1726 | } |
1727 | ||
dce4ec2e AL |
1728 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1729 | { | |
1730 | struct acpi_video_device *dev; | |
1731 | union acpi_object *levels; | |
1732 | ||
1733 | mutex_lock(&video->device_list_lock); | |
1734 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
9f9cd7ee | 1735 | if (!acpi_video_device_lcd_query_levels(dev->dev->handle, &levels)) |
dce4ec2e AL |
1736 | kfree(levels); |
1737 | } | |
1738 | mutex_unlock(&video->device_list_lock); | |
1739 | } | |
1740 | ||
e50b9be1 AL |
1741 | static bool acpi_video_should_register_backlight(struct acpi_video_device *dev) |
1742 | { | |
1743 | /* | |
1744 | * Do not create backlight device for video output | |
1745 | * device that is not in the enumerated list. | |
1746 | */ | |
1747 | if (!acpi_video_device_in_dod(dev)) { | |
1748 | dev_dbg(&dev->dev->dev, "not in _DOD list, ignore\n"); | |
1749 | return false; | |
1750 | } | |
1751 | ||
1752 | if (only_lcd) | |
1753 | return dev->flags.lcd; | |
1754 | return true; | |
1755 | } | |
1756 | ||
67b662e1 AL |
1757 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1758 | { | |
1759 | struct acpi_video_device *dev; | |
1760 | ||
53a92ba7 HG |
1761 | if (video->backlight_registered) |
1762 | return 0; | |
1763 | ||
dce4ec2e AL |
1764 | acpi_video_run_bcl_for_osi(video); |
1765 | ||
3bd6bce3 | 1766 | if (acpi_video_get_backlight_type() != acpi_backlight_video) |
99678ed7 HG |
1767 | return 0; |
1768 | ||
67b662e1 | 1769 | mutex_lock(&video->device_list_lock); |
e50b9be1 AL |
1770 | list_for_each_entry(dev, &video->video_device_list, entry) { |
1771 | if (acpi_video_should_register_backlight(dev)) | |
1772 | acpi_video_dev_register_backlight(dev); | |
1773 | } | |
67b662e1 AL |
1774 | mutex_unlock(&video->device_list_lock); |
1775 | ||
99678ed7 HG |
1776 | video->backlight_registered = true; |
1777 | ||
67b662e1 AL |
1778 | video->pm_nb.notifier_call = acpi_video_resume; |
1779 | video->pm_nb.priority = 0; | |
1780 | return register_pm_notifier(&video->pm_nb); | |
1781 | } | |
1782 | ||
1783 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1784 | { | |
1785 | if (device->backlight) { | |
1786 | backlight_device_unregister(device->backlight); | |
1787 | device->backlight = NULL; | |
1788 | } | |
1789 | if (device->brightness) { | |
1790 | kfree(device->brightness->levels); | |
1791 | kfree(device->brightness); | |
1792 | device->brightness = NULL; | |
1793 | } | |
1794 | if (device->cooling_dev) { | |
1795 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1796 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1797 | thermal_cooling_device_unregister(device->cooling_dev); | |
1798 | device->cooling_dev = NULL; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1803 | { | |
1804 | struct acpi_video_device *dev; | |
99678ed7 HG |
1805 | int error; |
1806 | ||
1807 | if (!video->backlight_registered) | |
1808 | return 0; | |
1809 | ||
1810 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1811 | |
1812 | mutex_lock(&video->device_list_lock); | |
1813 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1814 | acpi_video_dev_unregister_backlight(dev); | |
1815 | mutex_unlock(&video->device_list_lock); | |
1816 | ||
99678ed7 HG |
1817 | video->backlight_registered = false; |
1818 | ||
67b662e1 AL |
1819 | return error; |
1820 | } | |
1821 | ||
1822 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1823 | { | |
1824 | acpi_status status; | |
1825 | struct acpi_device *adev = device->dev; | |
1826 | ||
1827 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1828 | acpi_video_device_notify, device); | |
1829 | if (ACPI_FAILURE(status)) | |
1830 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1831 | else | |
1832 | device->flags.notify = 1; | |
1833 | } | |
1834 | ||
1835 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1836 | { | |
1837 | struct input_dev *input; | |
1838 | struct acpi_video_device *dev; | |
1839 | int error; | |
1840 | ||
1841 | video->input = input = input_allocate_device(); | |
1842 | if (!input) { | |
1843 | error = -ENOMEM; | |
1844 | goto out; | |
1845 | } | |
1846 | ||
1847 | error = acpi_video_bus_start_devices(video); | |
1848 | if (error) | |
1849 | goto err_free_input; | |
1850 | ||
1851 | snprintf(video->phys, sizeof(video->phys), | |
1852 | "%s/video/input0", acpi_device_hid(video->device)); | |
1853 | ||
1854 | input->name = acpi_device_name(video->device); | |
1855 | input->phys = video->phys; | |
1856 | input->id.bustype = BUS_HOST; | |
1857 | input->id.product = 0x06; | |
1858 | input->dev.parent = &video->device->dev; | |
1859 | input->evbit[0] = BIT(EV_KEY); | |
1860 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1861 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1862 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1863 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1864 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1865 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1866 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1867 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1868 | ||
1869 | error = input_register_device(input); | |
1870 | if (error) | |
1871 | goto err_stop_dev; | |
1872 | ||
1873 | mutex_lock(&video->device_list_lock); | |
1874 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1875 | acpi_video_dev_add_notify_handler(dev); | |
1876 | mutex_unlock(&video->device_list_lock); | |
1877 | ||
1878 | return 0; | |
1879 | ||
1880 | err_stop_dev: | |
1881 | acpi_video_bus_stop_devices(video); | |
1882 | err_free_input: | |
1883 | input_free_device(input); | |
1884 | video->input = NULL; | |
1885 | out: | |
1886 | return error; | |
1887 | } | |
1888 | ||
1889 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1890 | { | |
1891 | if (dev->flags.notify) { | |
1892 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1893 | acpi_video_device_notify); | |
1894 | dev->flags.notify = 0; | |
1895 | } | |
1896 | } | |
1897 | ||
1898 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1899 | { | |
1900 | struct acpi_video_device *dev; | |
1901 | ||
1902 | mutex_lock(&video->device_list_lock); | |
1903 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1904 | acpi_video_dev_remove_notify_handler(dev); | |
1905 | mutex_unlock(&video->device_list_lock); | |
1906 | ||
1907 | acpi_video_bus_stop_devices(video); | |
1908 | input_unregister_device(video->input); | |
1909 | video->input = NULL; | |
1910 | } | |
1911 | ||
1912 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1913 | { | |
1914 | struct acpi_video_device *dev, *next; | |
1915 | ||
1916 | mutex_lock(&video->device_list_lock); | |
1917 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1918 | list_del(&dev->entry); | |
1919 | kfree(dev); | |
1920 | } | |
1921 | mutex_unlock(&video->device_list_lock); | |
1922 | ||
1923 | return 0; | |
1924 | } | |
1925 | ||
ac7729da RW |
1926 | static int instance; |
1927 | ||
4be44fcd | 1928 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1929 | { |
f51e8391 | 1930 | struct acpi_video_bus *video; |
f51e8391 | 1931 | int error; |
c504f8cb ZR |
1932 | acpi_status status; |
1933 | ||
1934 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1935 | device->parent->handle, 1, | |
1936 | acpi_video_bus_match, NULL, | |
1937 | device, NULL); | |
1938 | if (status == AE_ALREADY_EXISTS) { | |
1939 | printk(KERN_WARNING FW_BUG | |
1940 | "Duplicate ACPI video bus devices for the" | |
1941 | " same VGA controller, please try module " | |
1942 | "parameter \"video.allow_duplicates=1\"" | |
1943 | "if the current driver doesn't work.\n"); | |
1944 | if (!allow_duplicates) | |
1945 | return -ENODEV; | |
1946 | } | |
1da177e4 | 1947 | |
36bcbec7 | 1948 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1949 | if (!video) |
d550d98d | 1950 | return -ENOMEM; |
1da177e4 | 1951 | |
e6d9da1d ZR |
1952 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1953 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1954 | if (instance) | |
1955 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1956 | instance++; |
e6d9da1d | 1957 | } |
f3b39f13 ZY |
1958 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1959 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1960 | if (instance) | |
1961 | device->pnp.bus_id[3] = '0' + instance; | |
1962 | instance++; | |
1963 | } | |
e6d9da1d | 1964 | |
e6afa0de | 1965 | video->device = device; |
1da177e4 LT |
1966 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1967 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1968 | device->driver_data = video; |
1da177e4 LT |
1969 | |
1970 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1971 | error = acpi_video_bus_check(video); |
1972 | if (error) | |
1973 | goto err_free_video; | |
1da177e4 | 1974 | |
bbac81f5 | 1975 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1976 | INIT_LIST_HEAD(&video->video_device_list); |
1977 | ||
ea9f8856 IM |
1978 | error = acpi_video_bus_get_devices(video, device); |
1979 | if (error) | |
91e13aa3 | 1980 | goto err_put_video; |
1da177e4 | 1981 | |
1da177e4 | 1982 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1983 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1984 | video->flags.multihead ? "yes" : "no", | |
1985 | video->flags.rom ? "yes" : "no", | |
1986 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1987 | mutex_lock(&video_list_lock); |
1988 | list_add_tail(&video->entry, &video_bus_head); | |
1989 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1990 | |
67b662e1 AL |
1991 | acpi_video_bus_register_backlight(video); |
1992 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1993 | |
f51e8391 DT |
1994 | return 0; |
1995 | ||
67b662e1 | 1996 | err_put_video: |
f51e8391 DT |
1997 | acpi_video_bus_put_devices(video); |
1998 | kfree(video->attached_array); | |
67b662e1 | 1999 | err_free_video: |
f51e8391 | 2000 | kfree(video); |
db89b4f0 | 2001 | device->driver_data = NULL; |
1da177e4 | 2002 | |
f51e8391 | 2003 | return error; |
1da177e4 LT |
2004 | } |
2005 | ||
51fac838 | 2006 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 2007 | { |
4be44fcd | 2008 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2009 | |
1da177e4 LT |
2010 | |
2011 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2012 | return -EINVAL; |
1da177e4 | 2013 | |
50dd0969 | 2014 | video = acpi_driver_data(device); |
1da177e4 | 2015 | |
67b662e1 AL |
2016 | acpi_video_bus_remove_notify_handler(video); |
2017 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 2018 | acpi_video_bus_put_devices(video); |
1da177e4 | 2019 | |
67b662e1 AL |
2020 | mutex_lock(&video_list_lock); |
2021 | list_del(&video->entry); | |
2022 | mutex_unlock(&video_list_lock); | |
2023 | ||
6044ec88 | 2024 | kfree(video->attached_array); |
1da177e4 LT |
2025 | kfree(video); |
2026 | ||
d550d98d | 2027 | return 0; |
1da177e4 LT |
2028 | } |
2029 | ||
c6996bdd AC |
2030 | static int __init is_i740(struct pci_dev *dev) |
2031 | { | |
2032 | if (dev->device == 0x00D1) | |
2033 | return 1; | |
2034 | if (dev->device == 0x7000) | |
2035 | return 1; | |
2036 | return 0; | |
2037 | } | |
2038 | ||
74a365b3 MG |
2039 | static int __init intel_opregion_present(void) |
2040 | { | |
c6996bdd | 2041 | int opregion = 0; |
74a365b3 MG |
2042 | struct pci_dev *dev = NULL; |
2043 | u32 address; | |
2044 | ||
2045 | for_each_pci_dev(dev) { | |
2046 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2047 | continue; | |
2048 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2049 | continue; | |
c6996bdd AC |
2050 | /* We don't want to poke around undefined i740 registers */ |
2051 | if (is_i740(dev)) | |
2052 | continue; | |
74a365b3 MG |
2053 | pci_read_config_dword(dev, 0xfc, &address); |
2054 | if (!address) | |
2055 | continue; | |
c6996bdd | 2056 | opregion = 1; |
74a365b3 | 2057 | } |
c6996bdd | 2058 | return opregion; |
74a365b3 MG |
2059 | } |
2060 | ||
8e5c2b77 | 2061 | int acpi_video_register(void) |
1da177e4 | 2062 | { |
2a8b18e9 | 2063 | int ret = 0; |
28d63403 | 2064 | |
970530cd HG |
2065 | mutex_lock(®ister_count_mutex); |
2066 | if (register_count) { | |
86e437f0 | 2067 | /* |
8e5c2b77 RW |
2068 | * if the function of acpi_video_register is already called, |
2069 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 | 2070 | */ |
2a8b18e9 | 2071 | goto leave; |
86e437f0 | 2072 | } |
1da177e4 | 2073 | |
7ee33baa HG |
2074 | dmi_check_system(video_dmi_table); |
2075 | ||
28d63403 CW |
2076 | ret = acpi_bus_register_driver(&acpi_video_bus); |
2077 | if (ret) | |
2a8b18e9 | 2078 | goto leave; |
1da177e4 | 2079 | |
86e437f0 ZY |
2080 | /* |
2081 | * When the acpi_video_bus is loaded successfully, increase | |
2082 | * the counter reference. | |
2083 | */ | |
970530cd | 2084 | register_count = 1; |
86e437f0 | 2085 | |
2a8b18e9 | 2086 | leave: |
970530cd | 2087 | mutex_unlock(®ister_count_mutex); |
2a8b18e9 | 2088 | return ret; |
1da177e4 | 2089 | } |
8e5c2b77 | 2090 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2091 | |
86e437f0 ZY |
2092 | void acpi_video_unregister(void) |
2093 | { | |
970530cd HG |
2094 | mutex_lock(®ister_count_mutex); |
2095 | if (register_count) { | |
2a8b18e9 | 2096 | acpi_bus_unregister_driver(&acpi_video_bus); |
970530cd | 2097 | register_count = 0; |
86e437f0 | 2098 | } |
970530cd | 2099 | mutex_unlock(®ister_count_mutex); |
86e437f0 ZY |
2100 | } |
2101 | EXPORT_SYMBOL(acpi_video_unregister); | |
2102 | ||
1b7f37e1 HG |
2103 | void acpi_video_unregister_backlight(void) |
2104 | { | |
2105 | struct acpi_video_bus *video; | |
2106 | ||
970530cd HG |
2107 | mutex_lock(®ister_count_mutex); |
2108 | if (register_count) { | |
2a8b18e9 HG |
2109 | mutex_lock(&video_list_lock); |
2110 | list_for_each_entry(video, &video_bus_head, entry) | |
2111 | acpi_video_bus_unregister_backlight(video); | |
2112 | mutex_unlock(&video_list_lock); | |
2113 | } | |
970530cd | 2114 | mutex_unlock(®ister_count_mutex); |
1b7f37e1 | 2115 | } |
1b7f37e1 | 2116 | |
90b066b1 HG |
2117 | bool acpi_video_handles_brightness_key_presses(void) |
2118 | { | |
2119 | bool have_video_busses; | |
2120 | ||
2121 | mutex_lock(&video_list_lock); | |
2122 | have_video_busses = !list_empty(&video_bus_head); | |
2123 | mutex_unlock(&video_list_lock); | |
2124 | ||
05bc59a0 HG |
2125 | return have_video_busses && |
2126 | (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS); | |
90b066b1 HG |
2127 | } |
2128 | EXPORT_SYMBOL(acpi_video_handles_brightness_key_presses); | |
2129 | ||
74a365b3 MG |
2130 | /* |
2131 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2132 | * the video opregion code to be run first in order to initialise | |
2133 | * state before any ACPI video calls are made. To handle this we defer | |
2134 | * registration of the video class until the opregion code has run. | |
2135 | */ | |
2136 | ||
2137 | static int __init acpi_video_init(void) | |
2138 | { | |
6e17cb12 CW |
2139 | /* |
2140 | * Let the module load even if ACPI is disabled (e.g. due to | |
2141 | * a broken BIOS) so that i915.ko can still be loaded on such | |
2142 | * old systems without an AcpiOpRegion. | |
2143 | * | |
2144 | * acpi_video_register() will report -ENODEV later as well due | |
2145 | * to acpi_disabled when i915.ko tries to register itself afterwards. | |
2146 | */ | |
2147 | if (acpi_disabled) | |
2148 | return 0; | |
2149 | ||
74a365b3 MG |
2150 | if (intel_opregion_present()) |
2151 | return 0; | |
2152 | ||
2153 | return acpi_video_register(); | |
2154 | } | |
1da177e4 | 2155 | |
86e437f0 | 2156 | static void __exit acpi_video_exit(void) |
1da177e4 | 2157 | { |
93a291df | 2158 | acpi_video_detect_exit(); |
86e437f0 | 2159 | acpi_video_unregister(); |
1da177e4 | 2160 | |
d550d98d | 2161 | return; |
1da177e4 LT |
2162 | } |
2163 | ||
2164 | module_init(acpi_video_init); | |
2165 | module_exit(acpi_video_exit); |