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 | * | |
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> |
8b48463f | 40 | #include <asm/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" | |
46 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
47 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
48 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
49 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
50 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
51 | ||
f4715189 TT |
52 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
53 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
54 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
55 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
56 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 57 | |
2f3d000a | 58 | #define MAX_NAME_LEN 20 |
1da177e4 | 59 | |
1da177e4 | 60 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 61 | ACPI_MODULE_NAME("video"); |
1da177e4 | 62 | |
f52fd66d | 63 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 64 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
65 | MODULE_LICENSE("GPL"); |
66 | ||
2843768b | 67 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
68 | module_param(brightness_switch_enabled, bool, 0644); |
69 | ||
c504f8cb ZR |
70 | /* |
71 | * By default, we don't allow duplicate ACPI video bus devices | |
72 | * under the same VGA controller | |
73 | */ | |
90ab5ee9 | 74 | static bool allow_duplicates; |
c504f8cb ZR |
75 | module_param(allow_duplicates, bool, 0644); |
76 | ||
654a182d HG |
77 | static int disable_backlight_sysfs_if = -1; |
78 | module_param(disable_backlight_sysfs_if, int, 0444); | |
79 | ||
05bc59a0 HG |
80 | #define REPORT_OUTPUT_KEY_EVENTS 0x01 |
81 | #define REPORT_BRIGHTNESS_KEY_EVENTS 0x02 | |
82 | static int report_key_events = -1; | |
83 | module_param(report_key_events, int, 0644); | |
84 | MODULE_PARM_DESC(report_key_events, | |
85 | "0: none, 1: output changes, 2: brightness changes, 3: all"); | |
86 | ||
e50b9be1 AL |
87 | static bool device_id_scheme = false; |
88 | module_param(device_id_scheme, bool, 0444); | |
89 | ||
90 | static bool only_lcd = false; | |
91 | module_param(only_lcd, bool, 0444); | |
92 | ||
970530cd HG |
93 | static int register_count; |
94 | static DEFINE_MUTEX(register_count_mutex); | |
14e93553 HG |
95 | static DEFINE_MUTEX(video_list_lock); |
96 | static LIST_HEAD(video_bus_head); | |
4be44fcd | 97 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 98 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 99 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
93a291df | 100 | void acpi_video_detect_exit(void); |
1da177e4 | 101 | |
1ba90e3a TR |
102 | static const struct acpi_device_id video_device_ids[] = { |
103 | {ACPI_VIDEO_HID, 0}, | |
104 | {"", 0}, | |
105 | }; | |
106 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
107 | ||
1da177e4 | 108 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 109 | .name = "video", |
1da177e4 | 110 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 111 | .ids = video_device_ids, |
1da177e4 LT |
112 | .ops = { |
113 | .add = acpi_video_bus_add, | |
114 | .remove = acpi_video_bus_remove, | |
7015558f | 115 | .notify = acpi_video_bus_notify, |
4be44fcd | 116 | }, |
1da177e4 LT |
117 | }; |
118 | ||
119 | struct acpi_video_bus_flags { | |
4be44fcd LB |
120 | u8 multihead:1; /* can switch video heads */ |
121 | u8 rom:1; /* can retrieve a video rom */ | |
122 | u8 post:1; /* can configure the head to */ | |
123 | u8 reserved:5; | |
1da177e4 LT |
124 | }; |
125 | ||
126 | struct acpi_video_bus_cap { | |
21fcb34e FC |
127 | u8 _DOS:1; /* Enable/Disable output switching */ |
128 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
129 | u8 _ROM:1; /* Get ROM Data */ | |
130 | u8 _GPD:1; /* Get POST Device */ | |
131 | u8 _SPD:1; /* Set POST Device */ | |
132 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 133 | u8 reserved:2; |
1da177e4 LT |
134 | }; |
135 | ||
4be44fcd LB |
136 | struct acpi_video_device_attrib { |
137 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
138 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
139 | u32 display_type:4; /* Describe the specific type in use */ | |
140 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
141 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
142 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 143 | the VGA device. */ |
21fcb34e FC |
144 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
145 | u32 reserved:10; /* Must be 0 */ | |
146 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct acpi_video_enumerated_device { | |
150 | union { | |
151 | u32 int_val; | |
4be44fcd | 152 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
153 | } value; |
154 | struct acpi_video_device *bind_info; | |
155 | }; | |
156 | ||
157 | struct acpi_video_bus { | |
e6afa0de | 158 | struct acpi_device *device; |
99678ed7 | 159 | bool backlight_registered; |
4be44fcd | 160 | u8 dos_setting; |
1da177e4 | 161 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd | 162 | u8 attached_count; |
b4df4636 | 163 | u8 child_count; |
4be44fcd | 164 | struct acpi_video_bus_cap cap; |
1da177e4 | 165 | struct acpi_video_bus_flags flags; |
4be44fcd | 166 | struct list_head video_device_list; |
bbac81f5 | 167 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 168 | struct list_head entry; |
e9dab196 LY |
169 | struct input_dev *input; |
170 | char phys[32]; /* for input device */ | |
ac7729da | 171 | struct notifier_block pm_nb; |
1da177e4 LT |
172 | }; |
173 | ||
174 | struct acpi_video_device_flags { | |
4be44fcd LB |
175 | u8 crt:1; |
176 | u8 lcd:1; | |
177 | u8 tvout:1; | |
82cae999 | 178 | u8 dvi:1; |
4be44fcd LB |
179 | u8 bios:1; |
180 | u8 unknown:1; | |
91e13aa3 AL |
181 | u8 notify:1; |
182 | u8 reserved:1; | |
1da177e4 LT |
183 | }; |
184 | ||
185 | struct acpi_video_device_cap { | |
21fcb34e FC |
186 | u8 _ADR:1; /* Return the unique ID */ |
187 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
188 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 189 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 190 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 191 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
192 | }; |
193 | ||
1da177e4 | 194 | struct acpi_video_device { |
4be44fcd LB |
195 | unsigned long device_id; |
196 | struct acpi_video_device_flags flags; | |
197 | struct acpi_video_device_cap cap; | |
198 | struct list_head entry; | |
8ab58e8e LT |
199 | struct delayed_work switch_brightness_work; |
200 | int switch_brightness_event; | |
4be44fcd LB |
201 | struct acpi_video_bus *video; |
202 | struct acpi_device *dev; | |
1da177e4 | 203 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 204 | struct backlight_device *backlight; |
4a703a8f | 205 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
206 | }; |
207 | ||
4be44fcd LB |
208 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
209 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
210 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
211 | struct acpi_video_device *device); | |
1da177e4 | 212 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
213 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
214 | int level); | |
215 | static int acpi_video_device_lcd_get_level_current( | |
216 | struct acpi_video_device *device, | |
a89803df | 217 | unsigned long long *level, bool raw); |
4be44fcd LB |
218 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
219 | u32 level_current, u32 event); | |
8ab58e8e | 220 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 221 | |
21fcb34e | 222 | /* backlight device sysfs support */ |
2f3d000a YL |
223 | static int acpi_video_get_brightness(struct backlight_device *bd) |
224 | { | |
27663c58 | 225 | unsigned long long cur_level; |
38531e6f | 226 | int i; |
7c364e79 | 227 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 228 | |
a89803df | 229 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 230 | return -EINVAL; |
38531e6f MG |
231 | for (i = 2; i < vd->brightness->count; i++) { |
232 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
233 | /* |
234 | * The first two entries are special - see page 575 | |
235 | * of the ACPI spec 3.0 | |
236 | */ | |
915ea7e4 | 237 | return i - 2; |
38531e6f MG |
238 | } |
239 | return 0; | |
2f3d000a YL |
240 | } |
241 | ||
242 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
243 | { | |
24450c7a | 244 | int request_level = bd->props.brightness + 2; |
7c364e79 | 245 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 246 | |
8ab58e8e | 247 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
248 | return acpi_video_device_lcd_set_level(vd, |
249 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
250 | } |
251 | ||
acc2472e | 252 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
253 | .get_brightness = acpi_video_get_brightness, |
254 | .update_status = acpi_video_set_brightness, | |
255 | }; | |
256 | ||
702ed512 | 257 | /* thermal cooling device callbacks */ |
4a703a8f | 258 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 259 | long *state) |
702ed512 | 260 | { |
4a703a8f | 261 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
262 | struct acpi_video_device *video = acpi_driver_data(device); |
263 | ||
6503e5df MG |
264 | *state = video->brightness->count - 3; |
265 | return 0; | |
702ed512 ZR |
266 | } |
267 | ||
4a703a8f | 268 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 269 | long *state) |
702ed512 | 270 | { |
4a703a8f | 271 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 272 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 273 | unsigned long long level; |
6503e5df | 274 | int offset; |
702ed512 | 275 | |
a89803df | 276 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 277 | return -EINVAL; |
6503e5df MG |
278 | for (offset = 2; offset < video->brightness->count; offset++) |
279 | if (level == video->brightness->levels[offset]) { | |
280 | *state = video->brightness->count - offset - 1; | |
281 | return 0; | |
282 | } | |
702ed512 ZR |
283 | |
284 | return -EINVAL; | |
285 | } | |
286 | ||
287 | static int | |
4a703a8f | 288 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 289 | { |
4a703a8f | 290 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
291 | struct acpi_video_device *video = acpi_driver_data(device); |
292 | int level; | |
293 | ||
915ea7e4 | 294 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
295 | return -EINVAL; |
296 | ||
297 | state = video->brightness->count - state; | |
915ea7e4 | 298 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
299 | return acpi_video_device_lcd_set_level(video, level); |
300 | } | |
301 | ||
9c8b04be | 302 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
303 | .get_max_state = video_get_max_state, |
304 | .get_cur_state = video_get_cur_state, | |
305 | .set_cur_state = video_set_cur_state, | |
306 | }; | |
307 | ||
21fcb34e FC |
308 | /* |
309 | * -------------------------------------------------------------------------- | |
310 | * Video Management | |
311 | * -------------------------------------------------------------------------- | |
312 | */ | |
1da177e4 | 313 | |
1da177e4 | 314 | static int |
05950094 | 315 | acpi_video_device_lcd_query_levels(acpi_handle handle, |
4be44fcd | 316 | union acpi_object **levels) |
1da177e4 | 317 | { |
4be44fcd LB |
318 | int status; |
319 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
320 | union acpi_object *obj; | |
1da177e4 | 321 | |
1da177e4 LT |
322 | |
323 | *levels = NULL; | |
324 | ||
05950094 | 325 | status = acpi_evaluate_object(handle, "_BCL", NULL, &buffer); |
1da177e4 | 326 | if (!ACPI_SUCCESS(status)) |
d550d98d | 327 | return status; |
4be44fcd | 328 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 329 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 330 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
331 | status = -EFAULT; |
332 | goto err; | |
333 | } | |
334 | ||
335 | *levels = obj; | |
336 | ||
d550d98d | 337 | return 0; |
1da177e4 | 338 | |
915ea7e4 | 339 | err: |
6044ec88 | 340 | kfree(buffer.pointer); |
1da177e4 | 341 | |
d550d98d | 342 | return status; |
1da177e4 LT |
343 | } |
344 | ||
345 | static int | |
4be44fcd | 346 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 347 | { |
24450c7a | 348 | int status; |
9e6dada9 | 349 | int state; |
1da177e4 | 350 | |
0db98202 JL |
351 | status = acpi_execute_simple_method(device->dev->handle, |
352 | "_BCM", level); | |
24450c7a ZR |
353 | if (ACPI_FAILURE(status)) { |
354 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
355 | return -EIO; | |
356 | } | |
357 | ||
4500ca8e | 358 | device->brightness->curr = level; |
9e6dada9 | 359 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 360 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
361 | if (device->backlight) |
362 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
363 | return 0; |
364 | } | |
9e6dada9 | 365 | |
24450c7a ZR |
366 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
367 | return -EINVAL; | |
1da177e4 LT |
368 | } |
369 | ||
45cb50e6 ZR |
370 | /* |
371 | * For some buggy _BQC methods, we need to add a constant value to | |
372 | * the _BQC return value to get the actual current brightness level | |
373 | */ | |
374 | ||
375 | static int bqc_offset_aml_bug_workaround; | |
7ee33baa | 376 | static int video_set_bqc_offset(const struct dmi_system_id *d) |
45cb50e6 ZR |
377 | { |
378 | bqc_offset_aml_bug_workaround = 9; | |
379 | return 0; | |
380 | } | |
381 | ||
7ee33baa | 382 | static int video_disable_backlight_sysfs_if( |
654a182d HG |
383 | const struct dmi_system_id *d) |
384 | { | |
385 | if (disable_backlight_sysfs_if == -1) | |
386 | disable_backlight_sysfs_if = 1; | |
387 | return 0; | |
388 | } | |
389 | ||
e50b9be1 AL |
390 | static int video_set_device_id_scheme(const struct dmi_system_id *d) |
391 | { | |
392 | device_id_scheme = true; | |
393 | return 0; | |
394 | } | |
395 | ||
396 | static int video_enable_only_lcd(const struct dmi_system_id *d) | |
397 | { | |
398 | only_lcd = true; | |
399 | return 0; | |
400 | } | |
401 | ||
4b4b3b20 HG |
402 | static int video_set_report_key_events(const struct dmi_system_id *id) |
403 | { | |
404 | if (report_key_events == -1) | |
405 | report_key_events = (uintptr_t)id->driver_data; | |
406 | return 0; | |
407 | } | |
408 | ||
7ee33baa | 409 | static struct dmi_system_id video_dmi_table[] = { |
45cb50e6 ZR |
410 | /* |
411 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
412 | */ | |
413 | { | |
414 | .callback = video_set_bqc_offset, | |
415 | .ident = "Acer Aspire 5720", | |
416 | .matches = { | |
417 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
418 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
419 | }, | |
420 | }, | |
5afc4abe LB |
421 | { |
422 | .callback = video_set_bqc_offset, | |
423 | .ident = "Acer Aspire 5710Z", | |
424 | .matches = { | |
425 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
426 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
427 | }, | |
428 | }, | |
34ac272b ZR |
429 | { |
430 | .callback = video_set_bqc_offset, | |
431 | .ident = "eMachines E510", | |
432 | .matches = { | |
433 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
434 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
435 | }, | |
436 | }, | |
93bcece2 ZR |
437 | { |
438 | .callback = video_set_bqc_offset, | |
439 | .ident = "Acer Aspire 5315", | |
440 | .matches = { | |
441 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
442 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
443 | }, | |
444 | }, | |
152a4e63 ZR |
445 | { |
446 | .callback = video_set_bqc_offset, | |
447 | .ident = "Acer Aspire 7720", | |
448 | .matches = { | |
449 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
450 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
451 | }, | |
452 | }, | |
5f24079b | 453 | |
654a182d HG |
454 | /* |
455 | * Some machines have a broken acpi-video interface for brightness | |
456 | * control, but still need an acpi_video_device_lcd_set_level() call | |
457 | * on resume to turn the backlight power on. We Enable backlight | |
458 | * control on these systems, but do not register a backlight sysfs | |
459 | * as brightness control does not work. | |
460 | */ | |
de588b8f HG |
461 | { |
462 | /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ | |
463 | .callback = video_disable_backlight_sysfs_if, | |
464 | .ident = "Toshiba Portege R700", | |
465 | .matches = { | |
466 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
467 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"), | |
468 | }, | |
469 | }, | |
654a182d HG |
470 | { |
471 | /* https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ | |
472 | .callback = video_disable_backlight_sysfs_if, | |
473 | .ident = "Toshiba Portege R830", | |
474 | .matches = { | |
475 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
476 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R830"), | |
477 | }, | |
478 | }, | |
b21f2e81 HG |
479 | { |
480 | /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ | |
481 | .callback = video_disable_backlight_sysfs_if, | |
482 | .ident = "Toshiba Satellite R830", | |
483 | .matches = { | |
484 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
485 | DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE R830"), | |
486 | }, | |
487 | }, | |
e50b9be1 AL |
488 | /* |
489 | * Some machine's _DOD IDs don't have bit 31(Device ID Scheme) set | |
490 | * but the IDs actually follow the Device ID Scheme. | |
491 | */ | |
492 | { | |
493 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
494 | .callback = video_set_device_id_scheme, | |
495 | .ident = "ESPRIMO Mobile M9410", | |
496 | .matches = { | |
497 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
498 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"), | |
499 | }, | |
500 | }, | |
501 | /* | |
502 | * Some machines have multiple video output devices, but only the one | |
503 | * that is the type of LCD can do the backlight control so we should not | |
504 | * register backlight interface for other video output devices. | |
505 | */ | |
506 | { | |
507 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
508 | .callback = video_enable_only_lcd, | |
509 | .ident = "ESPRIMO Mobile M9410", | |
510 | .matches = { | |
511 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
512 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"), | |
513 | }, | |
514 | }, | |
4b4b3b20 HG |
515 | /* |
516 | * Some machines report wrong key events on the acpi-bus, suppress | |
517 | * key event reporting on these. Note this is only intended to work | |
518 | * around events which are plain wrong. In some cases we get double | |
519 | * events, in this case acpi-video is considered the canonical source | |
520 | * and the events from the other source should be filtered. E.g. | |
521 | * by calling acpi_video_handles_brightness_key_presses() from the | |
522 | * vendor acpi/wmi driver or by using /lib/udev/hwdb.d/60-keyboard.hwdb | |
523 | */ | |
524 | { | |
525 | .callback = video_set_report_key_events, | |
526 | .driver_data = (void *)((uintptr_t)REPORT_OUTPUT_KEY_EVENTS), | |
527 | .ident = "Dell Vostro V131", | |
528 | .matches = { | |
529 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
530 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), | |
531 | }, | |
532 | }, | |
45cb50e6 ZR |
533 | {} |
534 | }; | |
535 | ||
994fa63c DB |
536 | static unsigned long long |
537 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
538 | unsigned long long bqc_value) | |
539 | { | |
540 | unsigned long long level; | |
541 | ||
542 | if (device->brightness->flags._BQC_use_index) { | |
543 | /* | |
544 | * _BQC returns an index that doesn't account for | |
545 | * the first 2 items with special meaning, so we need | |
546 | * to compensate for that by offsetting ourselves | |
547 | */ | |
548 | if (device->brightness->flags._BCL_reversed) | |
549 | bqc_value = device->brightness->count - 3 - bqc_value; | |
550 | ||
551 | level = device->brightness->levels[bqc_value + 2]; | |
552 | } else { | |
553 | level = bqc_value; | |
554 | } | |
555 | ||
556 | level += bqc_offset_aml_bug_workaround; | |
557 | ||
558 | return level; | |
559 | } | |
560 | ||
1da177e4 | 561 | static int |
4be44fcd | 562 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 563 | unsigned long long *level, bool raw) |
1da177e4 | 564 | { |
c8890f90 | 565 | acpi_status status = AE_OK; |
4e231fa4 | 566 | int i; |
c8890f90 | 567 | |
c60d638e ZR |
568 | if (device->cap._BQC || device->cap._BCQ) { |
569 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
570 | ||
571 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
572 | NULL, level); |
573 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
574 | if (raw) { |
575 | /* | |
576 | * Caller has indicated he wants the raw | |
577 | * value returned by _BQC, so don't furtherly | |
578 | * mess with the value. | |
579 | */ | |
580 | return 0; | |
581 | } | |
582 | ||
994fa63c | 583 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 584 | |
4e231fa4 VS |
585 | for (i = 2; i < device->brightness->count; i++) |
586 | if (device->brightness->levels[i] == *level) { | |
587 | device->brightness->curr = *level; | |
588 | return 0; | |
915ea7e4 | 589 | } |
a89803df DB |
590 | /* |
591 | * BQC returned an invalid level. | |
592 | * Stop using it. | |
593 | */ | |
594 | ACPI_WARNING((AE_INFO, | |
595 | "%s returned an invalid level", | |
596 | buf)); | |
597 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 598 | } else { |
21fcb34e FC |
599 | /* |
600 | * Fixme: | |
c8890f90 ZR |
601 | * should we return an error or ignore this failure? |
602 | * dev->brightness->curr is a cached value which stores | |
603 | * the correct current backlight level in most cases. | |
604 | * ACPI video backlight still works w/ buggy _BQC. | |
605 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
606 | */ | |
c60d638e ZR |
607 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
608 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
609 | } |
610 | } | |
611 | ||
4500ca8e | 612 | *level = device->brightness->curr; |
c8890f90 | 613 | return 0; |
1da177e4 LT |
614 | } |
615 | ||
616 | static int | |
4be44fcd LB |
617 | acpi_video_device_EDID(struct acpi_video_device *device, |
618 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 619 | { |
4be44fcd LB |
620 | int status; |
621 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
622 | union acpi_object *obj; | |
623 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
624 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 625 | |
1da177e4 LT |
626 | |
627 | *edid = NULL; | |
628 | ||
629 | if (!device) | |
d550d98d | 630 | return -ENODEV; |
1da177e4 LT |
631 | if (length == 128) |
632 | arg0.integer.value = 1; | |
633 | else if (length == 256) | |
634 | arg0.integer.value = 2; | |
635 | else | |
d550d98d | 636 | return -EINVAL; |
1da177e4 | 637 | |
90130268 | 638 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 639 | if (ACPI_FAILURE(status)) |
d550d98d | 640 | return -ENODEV; |
1da177e4 | 641 | |
50dd0969 | 642 | obj = buffer.pointer; |
1da177e4 LT |
643 | |
644 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
645 | *edid = obj; | |
646 | else { | |
6468463a | 647 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
648 | status = -EFAULT; |
649 | kfree(obj); | |
650 | } | |
651 | ||
d550d98d | 652 | return status; |
1da177e4 LT |
653 | } |
654 | ||
1da177e4 LT |
655 | /* bus */ |
656 | ||
1da177e4 LT |
657 | /* |
658 | * Arg: | |
21fcb34e FC |
659 | * video : video bus device pointer |
660 | * bios_flag : | |
1da177e4 LT |
661 | * 0. The system BIOS should NOT automatically switch(toggle) |
662 | * the active display output. | |
663 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 664 | * active display output. No switch event. |
1da177e4 LT |
665 | * 2. The _DGS value should be locked. |
666 | * 3. The system BIOS should not automatically switch (toggle) the | |
667 | * active display output, but instead generate the display switch | |
668 | * event notify code. | |
669 | * lcd_flag : | |
670 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 671 | * of the LCD when the power changes from AC to DC |
21fcb34e | 672 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 673 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 674 | * Return Value: |
ea9f8856 | 675 | * -EINVAL wrong arg. |
1da177e4 LT |
676 | */ |
677 | ||
678 | static int | |
4be44fcd | 679 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 680 | { |
ea9f8856 | 681 | acpi_status status; |
1da177e4 | 682 | |
b0373843 ZR |
683 | if (!video->cap._DOS) |
684 | return 0; | |
1da177e4 | 685 | |
ea9f8856 IM |
686 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
687 | return -EINVAL; | |
0db98202 JL |
688 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
689 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
690 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
691 | if (ACPI_FAILURE(status)) |
692 | return -EIO; | |
1da177e4 | 693 | |
ea9f8856 | 694 | return 0; |
1da177e4 LT |
695 | } |
696 | ||
935e5f29 ZR |
697 | /* |
698 | * Simple comparison function used to sort backlight levels. | |
699 | */ | |
700 | ||
701 | static int | |
702 | acpi_video_cmp_level(const void *a, const void *b) | |
703 | { | |
704 | return *(int *)a - *(int *)b; | |
705 | } | |
706 | ||
a50188da AL |
707 | /* |
708 | * Decides if _BQC/_BCQ for this system is usable | |
709 | * | |
710 | * We do this by changing the level first and then read out the current | |
711 | * brightness level, if the value does not match, find out if it is using | |
712 | * index. If not, clear the _BQC/_BCQ capability. | |
713 | */ | |
714 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
715 | int max_level, int current_level) | |
716 | { | |
717 | struct acpi_video_device_brightness *br = device->brightness; | |
718 | int result; | |
719 | unsigned long long level; | |
720 | int test_level; | |
721 | ||
722 | /* don't mess with existing known broken systems */ | |
723 | if (bqc_offset_aml_bug_workaround) | |
724 | return 0; | |
725 | ||
726 | /* | |
727 | * Some systems always report current brightness level as maximum | |
728 | * through _BQC, we need to test another value for them. | |
729 | */ | |
b3b301c5 | 730 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
731 | |
732 | result = acpi_video_device_lcd_set_level(device, test_level); | |
733 | if (result) | |
734 | return result; | |
735 | ||
736 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
737 | if (result) | |
738 | return result; | |
739 | ||
740 | if (level != test_level) { | |
741 | /* buggy _BQC found, need to find out if it uses index */ | |
742 | if (level < br->count) { | |
743 | if (br->flags._BCL_reversed) | |
744 | level = br->count - 3 - level; | |
745 | if (br->levels[level + 2] == test_level) | |
746 | br->flags._BQC_use_index = 1; | |
747 | } | |
748 | ||
749 | if (!br->flags._BQC_use_index) | |
750 | device->cap._BQC = device->cap._BCQ = 0; | |
751 | } | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
05950094 | 756 | int acpi_video_get_levels(struct acpi_device *device, |
9f9cd7ee AL |
757 | struct acpi_video_device_brightness **dev_br, |
758 | int *pmax_level) | |
469778c1 JJ |
759 | { |
760 | union acpi_object *obj = NULL; | |
d32f6947 | 761 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
469778c1 JJ |
762 | union acpi_object *o; |
763 | struct acpi_video_device_brightness *br = NULL; | |
05950094 | 764 | int result = 0; |
bd8ba205 | 765 | u32 value; |
469778c1 | 766 | |
05950094 AL |
767 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device->handle, |
768 | &obj))) { | |
469778c1 JJ |
769 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " |
770 | "LCD brightness level\n")); | |
05950094 | 771 | result = -ENODEV; |
469778c1 JJ |
772 | goto out; |
773 | } | |
774 | ||
05950094 AL |
775 | if (obj->package.count < 2) { |
776 | result = -EINVAL; | |
469778c1 | 777 | goto out; |
05950094 | 778 | } |
469778c1 JJ |
779 | |
780 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
781 | if (!br) { | |
782 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 783 | result = -ENOMEM; |
469778c1 JJ |
784 | goto out; |
785 | } | |
786 | ||
d32f6947 | 787 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 788 | GFP_KERNEL); |
1a7c618a ZR |
789 | if (!br->levels) { |
790 | result = -ENOMEM; | |
469778c1 | 791 | goto out_free; |
1a7c618a | 792 | } |
469778c1 JJ |
793 | |
794 | for (i = 0; i < obj->package.count; i++) { | |
795 | o = (union acpi_object *)&obj->package.elements[i]; | |
796 | if (o->type != ACPI_TYPE_INTEGER) { | |
797 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
798 | continue; | |
799 | } | |
bd8ba205 HG |
800 | value = (u32) o->integer.value; |
801 | /* Skip duplicate entries */ | |
802 | if (count > 2 && br->levels[count - 1] == value) | |
803 | continue; | |
804 | ||
805 | br->levels[count] = value; | |
469778c1 JJ |
806 | |
807 | if (br->levels[count] > max_level) | |
808 | max_level = br->levels[count]; | |
809 | count++; | |
810 | } | |
811 | ||
d32f6947 ZR |
812 | /* |
813 | * some buggy BIOS don't export the levels | |
814 | * when machine is on AC/Battery in _BCL package. | |
815 | * In this case, the first two elements in _BCL packages | |
816 | * are also supported brightness levels that OS should take care of. | |
817 | */ | |
90af2cf6 ZR |
818 | for (i = 2; i < count; i++) { |
819 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 820 | level_ac_battery++; |
90af2cf6 ZR |
821 | if (br->levels[i] == br->levels[1]) |
822 | level_ac_battery++; | |
823 | } | |
d32f6947 ZR |
824 | |
825 | if (level_ac_battery < 2) { | |
826 | level_ac_battery = 2 - level_ac_battery; | |
827 | br->flags._BCL_no_ac_battery_levels = 1; | |
828 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
829 | br->levels[i] = br->levels[i - level_ac_battery]; | |
830 | count += level_ac_battery; | |
831 | } else if (level_ac_battery > 2) | |
bf6787eb | 832 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 833 | |
d80fb99f ZR |
834 | /* Check if the _BCL package is in a reversed order */ |
835 | if (max_level == br->levels[2]) { | |
836 | br->flags._BCL_reversed = 1; | |
837 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
838 | acpi_video_cmp_level, NULL); | |
839 | } else if (max_level != br->levels[count - 1]) | |
840 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 841 | "Found unordered _BCL package")); |
469778c1 JJ |
842 | |
843 | br->count = count; | |
05950094 | 844 | *dev_br = br; |
9f9cd7ee AL |
845 | if (pmax_level) |
846 | *pmax_level = max_level; | |
05950094 AL |
847 | |
848 | out: | |
849 | kfree(obj); | |
850 | return result; | |
851 | out_free: | |
852 | kfree(br); | |
853 | goto out; | |
854 | } | |
855 | EXPORT_SYMBOL(acpi_video_get_levels); | |
856 | ||
857 | /* | |
858 | * Arg: | |
859 | * device : video output device (LCD, CRT, ..) | |
860 | * | |
861 | * Return Value: | |
862 | * Maximum brightness level | |
863 | * | |
864 | * Allocate and initialize device->brightness. | |
865 | */ | |
866 | ||
867 | static int | |
868 | acpi_video_init_brightness(struct acpi_video_device *device) | |
869 | { | |
870 | int i, max_level = 0; | |
871 | unsigned long long level, level_old; | |
872 | struct acpi_video_device_brightness *br = NULL; | |
873 | int result = -EINVAL; | |
874 | ||
9f9cd7ee | 875 | result = acpi_video_get_levels(device->dev, &br, &max_level); |
05950094 AL |
876 | if (result) |
877 | return result; | |
469778c1 | 878 | device->brightness = br; |
1a7c618a | 879 | |
1a7c618a | 880 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 881 | br->curr = level = max_level; |
e047cca6 ZR |
882 | |
883 | if (!device->cap._BQC) | |
884 | goto set_level; | |
885 | ||
a89803df DB |
886 | result = acpi_video_device_lcd_get_level_current(device, |
887 | &level_old, true); | |
1a7c618a ZR |
888 | if (result) |
889 | goto out_free_levels; | |
890 | ||
a50188da | 891 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
892 | if (result) |
893 | goto out_free_levels; | |
a50188da AL |
894 | /* |
895 | * cap._BQC may get cleared due to _BQC is found to be broken | |
896 | * in acpi_video_bqc_quirk, so check again here. | |
897 | */ | |
898 | if (!device->cap._BQC) | |
899 | goto set_level; | |
e047cca6 | 900 | |
545ef368 AL |
901 | level = acpi_video_bqc_value_to_level(device, level_old); |
902 | /* | |
903 | * On some buggy laptops, _BQC returns an uninitialized | |
904 | * value when invoked for the first time, i.e. | |
905 | * level_old is invalid (no matter whether it's a level | |
906 | * or an index). Set the backlight to max_level in this case. | |
907 | */ | |
908 | for (i = 2; i < br->count; i++) | |
909 | if (level == br->levels[i]) | |
910 | break; | |
911 | if (i == br->count || !level) | |
912 | level = max_level; | |
e047cca6 | 913 | |
e047cca6 | 914 | set_level: |
90c53ca4 | 915 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
916 | if (result) |
917 | goto out_free_levels; | |
1a7c618a | 918 | |
d32f6947 | 919 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05950094 AL |
920 | "found %d brightness levels\n", br->count - 2)); |
921 | return 0; | |
469778c1 JJ |
922 | |
923 | out_free_levels: | |
924 | kfree(br->levels); | |
469778c1 | 925 | kfree(br); |
469778c1 | 926 | device->brightness = NULL; |
1a7c618a | 927 | return result; |
469778c1 JJ |
928 | } |
929 | ||
930 | /* | |
931 | * Arg: | |
932 | * device : video output device (LCD, CRT, ..) | |
933 | * | |
934 | * Return Value: | |
21fcb34e | 935 | * None |
1da177e4 | 936 | * |
98fb8fe1 | 937 | * Find out all required AML methods defined under the output |
1da177e4 LT |
938 | * device. |
939 | */ | |
940 | ||
4be44fcd | 941 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 942 | { |
952c63e9 | 943 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 944 | device->cap._ADR = 1; |
952c63e9 | 945 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 946 | device->cap._BCL = 1; |
952c63e9 | 947 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 948 | device->cap._BCM = 1; |
952c63e9 | 949 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 950 | device->cap._BQC = 1; |
952c63e9 | 951 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
952 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
953 | device->cap._BCQ = 1; | |
954 | } | |
955 | ||
952c63e9 | 956 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 957 | device->cap._DDC = 1; |
1da177e4 LT |
958 | } |
959 | ||
960 | /* | |
21fcb34e FC |
961 | * Arg: |
962 | * device : video output device (VGA) | |
1da177e4 LT |
963 | * |
964 | * Return Value: | |
21fcb34e | 965 | * None |
1da177e4 | 966 | * |
98fb8fe1 | 967 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
968 | */ |
969 | ||
4be44fcd | 970 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 971 | { |
952c63e9 | 972 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 973 | video->cap._DOS = 1; |
952c63e9 | 974 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 975 | video->cap._DOD = 1; |
952c63e9 | 976 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 977 | video->cap._ROM = 1; |
952c63e9 | 978 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 979 | video->cap._GPD = 1; |
952c63e9 | 980 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 981 | video->cap._SPD = 1; |
952c63e9 | 982 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 983 | video->cap._VPO = 1; |
1da177e4 LT |
984 | } |
985 | ||
986 | /* | |
987 | * Check whether the video bus device has required AML method to | |
988 | * support the desired features | |
989 | */ | |
990 | ||
4be44fcd | 991 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 992 | { |
4be44fcd | 993 | acpi_status status = -ENOENT; |
1e4cffe7 | 994 | struct pci_dev *dev; |
1da177e4 LT |
995 | |
996 | if (!video) | |
d550d98d | 997 | return -EINVAL; |
1da177e4 | 998 | |
1e4cffe7 | 999 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1000 | if (!dev) |
1001 | return -ENODEV; | |
1e4cffe7 | 1002 | pci_dev_put(dev); |
22c13f9d | 1003 | |
21fcb34e FC |
1004 | /* |
1005 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1006 | * to check well known required nodes. |
1007 | */ | |
1008 | ||
98fb8fe1 | 1009 | /* Does this device support video switching? */ |
3a1151e3 SB |
1010 | if (video->cap._DOS || video->cap._DOD) { |
1011 | if (!video->cap._DOS) { | |
1012 | printk(KERN_WARNING FW_BUG | |
1013 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1014 | acpi_device_bid(video->device)); | |
1015 | } | |
1da177e4 LT |
1016 | video->flags.multihead = 1; |
1017 | status = 0; | |
1018 | } | |
1019 | ||
98fb8fe1 | 1020 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1021 | if (video->cap._ROM) { |
1da177e4 LT |
1022 | video->flags.rom = 1; |
1023 | status = 0; | |
1024 | } | |
1025 | ||
98fb8fe1 | 1026 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1027 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1028 | video->flags.post = 1; |
1029 | status = 0; | |
1030 | } | |
1031 | ||
d550d98d | 1032 | return status; |
1da177e4 LT |
1033 | } |
1034 | ||
21fcb34e FC |
1035 | /* |
1036 | * -------------------------------------------------------------------------- | |
1037 | * Driver Interface | |
1038 | * -------------------------------------------------------------------------- | |
1039 | */ | |
1da177e4 LT |
1040 | |
1041 | /* device interface */ | |
915ea7e4 | 1042 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1043 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1044 | { | |
78eed028 DT |
1045 | struct acpi_video_enumerated_device *ids; |
1046 | int i; | |
1047 | ||
1048 | for (i = 0; i < video->attached_count; i++) { | |
1049 | ids = &video->attached_array[i]; | |
1050 | if ((ids->value.int_val & 0xffff) == device_id) | |
1051 | return &ids->value.attrib; | |
1052 | } | |
82cae999 | 1053 | |
82cae999 RZ |
1054 | return NULL; |
1055 | } | |
1da177e4 | 1056 | |
e92a7162 MG |
1057 | static int |
1058 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1059 | unsigned long device_id) | |
1060 | { | |
1061 | struct acpi_video_enumerated_device *ids; | |
1062 | int i; | |
1063 | ||
1064 | for (i = 0; i < video->attached_count; i++) { | |
1065 | ids = &video->attached_array[i]; | |
1066 | if ((ids->value.int_val & 0xffff) == device_id) | |
1067 | return ids->value.int_val; | |
1068 | } | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
1da177e4 | 1073 | static int |
4be44fcd LB |
1074 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1075 | struct acpi_video_bus *video) | |
1da177e4 | 1076 | { |
27663c58 | 1077 | unsigned long long device_id; |
e92a7162 | 1078 | int status, device_type; |
4be44fcd | 1079 | struct acpi_video_device *data; |
915ea7e4 | 1080 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1081 | |
4be44fcd LB |
1082 | status = |
1083 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1084 | /* Some device omits _ADR, we skip them instead of fail */ |
1085 | if (ACPI_FAILURE(status)) | |
1086 | return 0; | |
1da177e4 | 1087 | |
91e13aa3 AL |
1088 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1089 | if (!data) | |
1090 | return -ENOMEM; | |
82cae999 | 1091 | |
91e13aa3 AL |
1092 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1093 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1094 | device->driver_data = data; | |
1095 | ||
1096 | data->device_id = device_id; | |
1097 | data->video = video; | |
1098 | data->dev = device; | |
8ab58e8e LT |
1099 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1100 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1101 | |
1102 | attribute = acpi_video_get_device_attr(video, device_id); | |
1103 | ||
e50b9be1 | 1104 | if (attribute && (attribute->device_id_scheme || device_id_scheme)) { |
91e13aa3 AL |
1105 | switch (attribute->display_type) { |
1106 | case ACPI_VIDEO_DISPLAY_CRT: | |
1107 | data->flags.crt = 1; | |
1108 | break; | |
1109 | case ACPI_VIDEO_DISPLAY_TV: | |
1110 | data->flags.tvout = 1; | |
1111 | break; | |
1112 | case ACPI_VIDEO_DISPLAY_DVI: | |
1113 | data->flags.dvi = 1; | |
1114 | break; | |
1115 | case ACPI_VIDEO_DISPLAY_LCD: | |
1116 | data->flags.lcd = 1; | |
1117 | break; | |
1118 | default: | |
1119 | data->flags.unknown = 1; | |
1120 | break; | |
1121 | } | |
915ea7e4 | 1122 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1123 | data->flags.bios = 1; |
1124 | } else { | |
1125 | /* Check for legacy IDs */ | |
1126 | device_type = acpi_video_get_device_type(video, device_id); | |
1127 | /* Ignore bits 16 and 18-20 */ | |
1128 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1129 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1130 | data->flags.crt = 1; | |
1131 | break; | |
1132 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1133 | data->flags.lcd = 1; | |
1134 | break; | |
1135 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1136 | data->flags.tvout = 1; | |
1137 | break; | |
1138 | default: | |
1139 | data->flags.unknown = 1; | |
e92a7162 | 1140 | } |
91e13aa3 | 1141 | } |
4be44fcd | 1142 | |
91e13aa3 AL |
1143 | acpi_video_device_bind(video, data); |
1144 | acpi_video_device_find_cap(data); | |
1da177e4 | 1145 | |
91e13aa3 AL |
1146 | mutex_lock(&video->device_list_lock); |
1147 | list_add_tail(&data->entry, &video->video_device_list); | |
1148 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1149 | |
91e13aa3 | 1150 | return status; |
1da177e4 LT |
1151 | } |
1152 | ||
1153 | /* | |
1154 | * Arg: | |
21fcb34e | 1155 | * video : video bus device |
1da177e4 LT |
1156 | * |
1157 | * Return: | |
21fcb34e FC |
1158 | * none |
1159 | * | |
1160 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1161 | * bind the ids with the corresponding video devices |
1162 | * under the video bus. | |
4be44fcd | 1163 | */ |
1da177e4 | 1164 | |
4be44fcd | 1165 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1166 | { |
ff102ea9 DT |
1167 | struct acpi_video_device *dev; |
1168 | ||
bbac81f5 | 1169 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1170 | |
1171 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1172 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1173 | |
bbac81f5 | 1174 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1175 | } |
1176 | ||
1177 | /* | |
1178 | * Arg: | |
21fcb34e FC |
1179 | * video : video bus device |
1180 | * device : video output device under the video | |
1181 | * bus | |
1da177e4 LT |
1182 | * |
1183 | * Return: | |
21fcb34e FC |
1184 | * none |
1185 | * | |
1da177e4 LT |
1186 | * Bind the ids with the corresponding video devices |
1187 | * under the video bus. | |
4be44fcd | 1188 | */ |
1da177e4 LT |
1189 | |
1190 | static void | |
4be44fcd LB |
1191 | acpi_video_device_bind(struct acpi_video_bus *video, |
1192 | struct acpi_video_device *device) | |
1da177e4 | 1193 | { |
78eed028 | 1194 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1195 | int i; |
1da177e4 | 1196 | |
78eed028 DT |
1197 | for (i = 0; i < video->attached_count; i++) { |
1198 | ids = &video->attached_array[i]; | |
1199 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1200 | ids->bind_info = device; | |
1da177e4 LT |
1201 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1202 | } | |
1203 | } | |
1da177e4 LT |
1204 | } |
1205 | ||
0b8db271 AL |
1206 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1207 | { | |
1208 | struct acpi_video_bus *video = device->video; | |
1209 | int i; | |
1210 | ||
b4df4636 AL |
1211 | /* |
1212 | * If we have a broken _DOD or we have more than 8 output devices | |
1213 | * under the graphics controller node that we can't proper deal with | |
1214 | * in the operation region code currently, no need to test. | |
1215 | */ | |
1216 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1217 | return true; |
1218 | ||
1219 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1220 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1221 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1222 | return true; |
1223 | } | |
1224 | ||
1225 | return false; | |
1226 | } | |
1227 | ||
1da177e4 LT |
1228 | /* |
1229 | * Arg: | |
21fcb34e | 1230 | * video : video bus device |
1da177e4 LT |
1231 | * |
1232 | * Return: | |
21fcb34e FC |
1233 | * < 0 : error |
1234 | * | |
1da177e4 LT |
1235 | * Call _DOD to enumerate all devices attached to display adapter |
1236 | * | |
4be44fcd | 1237 | */ |
1da177e4 LT |
1238 | |
1239 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1240 | { | |
4be44fcd LB |
1241 | int status; |
1242 | int count; | |
1243 | int i; | |
78eed028 | 1244 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1245 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1246 | union acpi_object *dod = NULL; | |
1247 | union acpi_object *obj; | |
1da177e4 | 1248 | |
90130268 | 1249 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1250 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1251 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1252 | return status; |
1da177e4 LT |
1253 | } |
1254 | ||
50dd0969 | 1255 | dod = buffer.pointer; |
1da177e4 | 1256 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1257 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1258 | status = -EFAULT; |
1259 | goto out; | |
1260 | } | |
1261 | ||
1262 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1263 | dod->package.count)); |
1da177e4 | 1264 | |
78eed028 DT |
1265 | active_list = kcalloc(1 + dod->package.count, |
1266 | sizeof(struct acpi_video_enumerated_device), | |
1267 | GFP_KERNEL); | |
1268 | if (!active_list) { | |
1da177e4 LT |
1269 | status = -ENOMEM; |
1270 | goto out; | |
1271 | } | |
1272 | ||
1273 | count = 0; | |
1274 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1275 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1276 | |
1277 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1278 | printk(KERN_ERR PREFIX |
1279 | "Invalid _DOD data in element %d\n", i); | |
1280 | continue; | |
1da177e4 | 1281 | } |
78eed028 DT |
1282 | |
1283 | active_list[count].value.int_val = obj->integer.value; | |
1284 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1285 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1286 | (int)obj->integer.value)); | |
1da177e4 LT |
1287 | count++; |
1288 | } | |
1da177e4 | 1289 | |
6044ec88 | 1290 | kfree(video->attached_array); |
4be44fcd | 1291 | |
78eed028 | 1292 | video->attached_array = active_list; |
1da177e4 | 1293 | video->attached_count = count; |
78eed028 | 1294 | |
915ea7e4 | 1295 | out: |
02438d87 | 1296 | kfree(buffer.pointer); |
d550d98d | 1297 | return status; |
1da177e4 LT |
1298 | } |
1299 | ||
4be44fcd LB |
1300 | static int |
1301 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1302 | u32 level_current, u32 event) | |
1da177e4 | 1303 | { |
63f0edfc | 1304 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1305 | max = max_below = 0; |
1306 | min = min_above = 255; | |
63f0edfc | 1307 | /* Find closest level to level_current */ |
0a3db1ce | 1308 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1309 | l = device->brightness->levels[i]; |
1310 | if (abs(l - level_current) < abs(delta)) { | |
1311 | delta = l - level_current; | |
1312 | if (!delta) | |
1313 | break; | |
1314 | } | |
1315 | } | |
1316 | /* Ajust level_current to closest available level */ | |
1317 | level_current += delta; | |
0a3db1ce | 1318 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1319 | l = device->brightness->levels[i]; |
1320 | if (l < min) | |
1321 | min = l; | |
1322 | if (l > max) | |
1323 | max = l; | |
1324 | if (l < min_above && l > level_current) | |
1325 | min_above = l; | |
1326 | if (l > max_below && l < level_current) | |
1327 | max_below = l; | |
1328 | } | |
1329 | ||
1330 | switch (event) { | |
1331 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1332 | return (level_current < max) ? min_above : min; | |
1333 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1334 | return (level_current < max) ? min_above : max; | |
1335 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1336 | return (level_current > min) ? max_below : min; | |
1337 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1338 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1339 | return 0; | |
1340 | default: | |
1341 | return level_current; | |
1342 | } | |
1da177e4 LT |
1343 | } |
1344 | ||
8ab58e8e LT |
1345 | static void |
1346 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1347 | { |
8ab58e8e LT |
1348 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1349 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1350 | unsigned long long level_current, level_next; |
8ab58e8e | 1351 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1352 | int result = -EINVAL; |
1353 | ||
fbc9fe1b | 1354 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
654a182d | 1355 | if (!device->backlight) |
8ab58e8e | 1356 | return; |
28c32e99 | 1357 | |
469778c1 | 1358 | if (!device->brightness) |
c8890f90 ZR |
1359 | goto out; |
1360 | ||
1361 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1362 | &level_current, |
1363 | false); | |
c8890f90 ZR |
1364 | if (result) |
1365 | goto out; | |
1366 | ||
1da177e4 | 1367 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1368 | |
24450c7a | 1369 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1370 | |
36342742 MG |
1371 | if (!result) |
1372 | backlight_force_update(device->backlight, | |
1373 | BACKLIGHT_UPDATE_HOTKEY); | |
1374 | ||
c8890f90 ZR |
1375 | out: |
1376 | if (result) | |
1377 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1378 | } |
1379 | ||
e92a7162 MG |
1380 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1381 | void **edid) | |
1382 | { | |
1383 | struct acpi_video_bus *video; | |
1384 | struct acpi_video_device *video_device; | |
1385 | union acpi_object *buffer = NULL; | |
1386 | acpi_status status; | |
1387 | int i, length; | |
1388 | ||
1389 | if (!device || !acpi_driver_data(device)) | |
1390 | return -EINVAL; | |
1391 | ||
1392 | video = acpi_driver_data(device); | |
1393 | ||
1394 | for (i = 0; i < video->attached_count; i++) { | |
1395 | video_device = video->attached_array[i].bind_info; | |
1396 | length = 256; | |
1397 | ||
1398 | if (!video_device) | |
1399 | continue; | |
1400 | ||
82069552 ZR |
1401 | if (!video_device->cap._DDC) |
1402 | continue; | |
1403 | ||
e92a7162 MG |
1404 | if (type) { |
1405 | switch (type) { | |
1406 | case ACPI_VIDEO_DISPLAY_CRT: | |
1407 | if (!video_device->flags.crt) | |
1408 | continue; | |
1409 | break; | |
1410 | case ACPI_VIDEO_DISPLAY_TV: | |
1411 | if (!video_device->flags.tvout) | |
1412 | continue; | |
1413 | break; | |
1414 | case ACPI_VIDEO_DISPLAY_DVI: | |
1415 | if (!video_device->flags.dvi) | |
1416 | continue; | |
1417 | break; | |
1418 | case ACPI_VIDEO_DISPLAY_LCD: | |
1419 | if (!video_device->flags.lcd) | |
1420 | continue; | |
1421 | break; | |
1422 | } | |
1423 | } else if (video_device->device_id != device_id) { | |
1424 | continue; | |
1425 | } | |
1426 | ||
1427 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1428 | ||
1429 | if (ACPI_FAILURE(status) || !buffer || | |
1430 | buffer->type != ACPI_TYPE_BUFFER) { | |
1431 | length = 128; | |
1432 | status = acpi_video_device_EDID(video_device, &buffer, | |
1433 | length); | |
1434 | if (ACPI_FAILURE(status) || !buffer || | |
1435 | buffer->type != ACPI_TYPE_BUFFER) { | |
1436 | continue; | |
1437 | } | |
1438 | } | |
1439 | ||
1440 | *edid = buffer->buffer.pointer; | |
1441 | return length; | |
1442 | } | |
1443 | ||
1444 | return -ENODEV; | |
1445 | } | |
1446 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1447 | ||
1da177e4 | 1448 | static int |
4be44fcd LB |
1449 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1450 | struct acpi_device *device) | |
1da177e4 | 1451 | { |
fba4e087 | 1452 | int status = 0; |
ff102ea9 | 1453 | struct acpi_device *dev; |
1da177e4 | 1454 | |
fba4e087 IM |
1455 | /* |
1456 | * There are systems where video module known to work fine regardless | |
1457 | * of broken _DOD and ignoring returned value here doesn't cause | |
1458 | * any issues later. | |
1459 | */ | |
1460 | acpi_video_device_enumerate(video); | |
1da177e4 | 1461 | |
ff102ea9 | 1462 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1463 | |
1464 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1465 | if (status) { |
91e13aa3 AL |
1466 | dev_err(&dev->dev, "Can't attach device\n"); |
1467 | break; | |
1da177e4 | 1468 | } |
b4df4636 | 1469 | video->child_count++; |
1da177e4 | 1470 | } |
d550d98d | 1471 | return status; |
1da177e4 LT |
1472 | } |
1473 | ||
1da177e4 LT |
1474 | /* acpi_video interface */ |
1475 | ||
efaa14c7 AL |
1476 | /* |
1477 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1478 | * preform any automatic brightness change on receiving a notification. | |
1479 | */ | |
4be44fcd | 1480 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1481 | { |
efaa14c7 | 1482 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1483 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1484 | } |
1485 | ||
4be44fcd | 1486 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1487 | { |
efaa14c7 | 1488 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1489 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1490 | } |
1491 | ||
7015558f | 1492 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1493 | { |
7015558f | 1494 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1495 | struct input_dev *input; |
17c452f9 | 1496 | int keycode = 0; |
e9dab196 | 1497 | |
67b662e1 | 1498 | if (!video || !video->input) |
d550d98d | 1499 | return; |
1da177e4 | 1500 | |
e9dab196 | 1501 | input = video->input; |
1da177e4 LT |
1502 | |
1503 | switch (event) { | |
98fb8fe1 | 1504 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1505 | * most likely via hotkey. */ |
8a37c65d | 1506 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1507 | break; |
1508 | ||
98fb8fe1 | 1509 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1510 | * connector. */ |
1511 | acpi_video_device_enumerate(video); | |
1512 | acpi_video_device_rebind(video); | |
e9dab196 | 1513 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1514 | break; |
1515 | ||
4be44fcd | 1516 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1517 | keycode = KEY_SWITCHVIDEOMODE; |
1518 | break; | |
4be44fcd | 1519 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1520 | keycode = KEY_VIDEO_NEXT; |
1521 | break; | |
4be44fcd | 1522 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1523 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1524 | break; |
1525 | ||
1526 | default: | |
1527 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1528 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1529 | break; |
1530 | } | |
1531 | ||
8a37c65d LT |
1532 | if (acpi_notifier_call_chain(device, event, 0)) |
1533 | /* Something vetoed the keypress. */ | |
1534 | keycode = 0; | |
17c452f9 | 1535 | |
05bc59a0 | 1536 | if (keycode && (report_key_events & REPORT_OUTPUT_KEY_EVENTS)) { |
17c452f9 MG |
1537 | input_report_key(input, keycode, 1); |
1538 | input_sync(input); | |
1539 | input_report_key(input, keycode, 0); | |
1540 | input_sync(input); | |
1541 | } | |
e9dab196 | 1542 | |
d550d98d | 1543 | return; |
1da177e4 LT |
1544 | } |
1545 | ||
8ab58e8e LT |
1546 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1547 | u32 event) | |
1548 | { | |
1549 | if (!brightness_switch_enabled) | |
1550 | return; | |
1551 | ||
1552 | video_device->switch_brightness_event = event; | |
1553 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1554 | } | |
1555 | ||
4be44fcd | 1556 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1557 | { |
50dd0969 | 1558 | struct acpi_video_device *video_device = data; |
4be44fcd | 1559 | struct acpi_device *device = NULL; |
e9dab196 LY |
1560 | struct acpi_video_bus *bus; |
1561 | struct input_dev *input; | |
17c452f9 | 1562 | int keycode = 0; |
1da177e4 | 1563 | |
1da177e4 | 1564 | if (!video_device) |
d550d98d | 1565 | return; |
1da177e4 | 1566 | |
e6afa0de | 1567 | device = video_device->dev; |
e9dab196 LY |
1568 | bus = video_device->video; |
1569 | input = bus->input; | |
1da177e4 LT |
1570 | |
1571 | switch (event) { | |
4be44fcd | 1572 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1573 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1574 | keycode = KEY_BRIGHTNESS_CYCLE; |
1575 | break; | |
4be44fcd | 1576 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1577 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1578 | keycode = KEY_BRIGHTNESSUP; |
1579 | break; | |
4be44fcd | 1580 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1581 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1582 | keycode = KEY_BRIGHTNESSDOWN; |
1583 | break; | |
70f23fd6 | 1584 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1585 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1586 | keycode = KEY_BRIGHTNESS_ZERO; |
1587 | break; | |
4be44fcd | 1588 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1589 | brightness_switch_event(video_device, event); |
e9dab196 | 1590 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1591 | break; |
1592 | default: | |
1593 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1594 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1595 | break; |
1596 | } | |
e9dab196 | 1597 | |
7761f638 | 1598 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 | 1599 | |
05bc59a0 | 1600 | if (keycode && (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS)) { |
17c452f9 MG |
1601 | input_report_key(input, keycode, 1); |
1602 | input_sync(input); | |
1603 | input_report_key(input, keycode, 0); | |
1604 | input_sync(input); | |
1605 | } | |
e9dab196 | 1606 | |
d550d98d | 1607 | return; |
1da177e4 LT |
1608 | } |
1609 | ||
ac7729da RW |
1610 | static int acpi_video_resume(struct notifier_block *nb, |
1611 | unsigned long val, void *ign) | |
863c1490 MG |
1612 | { |
1613 | struct acpi_video_bus *video; | |
1614 | struct acpi_video_device *video_device; | |
1615 | int i; | |
1616 | ||
ac7729da RW |
1617 | switch (val) { |
1618 | case PM_HIBERNATION_PREPARE: | |
1619 | case PM_SUSPEND_PREPARE: | |
1620 | case PM_RESTORE_PREPARE: | |
1621 | return NOTIFY_DONE; | |
1622 | } | |
863c1490 | 1623 | |
ac7729da RW |
1624 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1625 | ||
1626 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1627 | |
1628 | for (i = 0; i < video->attached_count; i++) { | |
1629 | video_device = video->attached_array[i].bind_info; | |
654a182d HG |
1630 | if (video_device && video_device->brightness) |
1631 | acpi_video_device_lcd_set_level(video_device, | |
1632 | video_device->brightness->curr); | |
863c1490 | 1633 | } |
ac7729da RW |
1634 | |
1635 | return NOTIFY_OK; | |
863c1490 MG |
1636 | } |
1637 | ||
c504f8cb ZR |
1638 | static acpi_status |
1639 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1640 | void **return_value) | |
1641 | { | |
1642 | struct acpi_device *device = context; | |
1643 | struct acpi_device *sibling; | |
1644 | int result; | |
1645 | ||
1646 | if (handle == device->handle) | |
1647 | return AE_CTRL_TERMINATE; | |
1648 | ||
1649 | result = acpi_bus_get_device(handle, &sibling); | |
1650 | if (result) | |
1651 | return AE_OK; | |
1652 | ||
1653 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1654 | return AE_ALREADY_EXISTS; | |
1655 | ||
1656 | return AE_OK; | |
1657 | } | |
1658 | ||
67b662e1 AL |
1659 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1660 | { | |
99678ed7 HG |
1661 | struct backlight_properties props; |
1662 | struct pci_dev *pdev; | |
1663 | acpi_handle acpi_parent; | |
1664 | struct device *parent = NULL; | |
1665 | int result; | |
1666 | static int count; | |
1667 | char *name; | |
67b662e1 | 1668 | |
99678ed7 HG |
1669 | result = acpi_video_init_brightness(device); |
1670 | if (result) | |
1671 | return; | |
654a182d HG |
1672 | |
1673 | if (disable_backlight_sysfs_if > 0) | |
1674 | return; | |
1675 | ||
99678ed7 HG |
1676 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
1677 | if (!name) | |
1678 | return; | |
1679 | count++; | |
67b662e1 | 1680 | |
99678ed7 | 1681 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1682 | |
99678ed7 HG |
1683 | pdev = acpi_get_pci_dev(acpi_parent); |
1684 | if (pdev) { | |
1685 | parent = &pdev->dev; | |
1686 | pci_dev_put(pdev); | |
1687 | } | |
67b662e1 | 1688 | |
99678ed7 HG |
1689 | memset(&props, 0, sizeof(struct backlight_properties)); |
1690 | props.type = BACKLIGHT_FIRMWARE; | |
1691 | props.max_brightness = device->brightness->count - 3; | |
1692 | device->backlight = backlight_device_register(name, | |
1693 | parent, | |
1694 | device, | |
1695 | &acpi_backlight_ops, | |
1696 | &props); | |
1697 | kfree(name); | |
654a182d HG |
1698 | if (IS_ERR(device->backlight)) { |
1699 | device->backlight = NULL; | |
99678ed7 | 1700 | return; |
654a182d | 1701 | } |
67b662e1 | 1702 | |
99678ed7 HG |
1703 | /* |
1704 | * Save current brightness level in case we have to restore it | |
1705 | * before acpi_video_device_lcd_set_level() is called next time. | |
1706 | */ | |
1707 | device->backlight->props.brightness = | |
1708 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1709 | |
99678ed7 HG |
1710 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1711 | device->dev, &video_cooling_ops); | |
1712 | if (IS_ERR(device->cooling_dev)) { | |
1713 | /* | |
1714 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1715 | * Also, why the hell we are returning early and not attempt to | |
1716 | * register video output if cooling device registration failed? | |
1717 | * -- dtor | |
1718 | */ | |
1719 | device->cooling_dev = NULL; | |
1720 | return; | |
67b662e1 | 1721 | } |
99678ed7 HG |
1722 | |
1723 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1724 | device->cooling_dev->id); | |
1725 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1726 | &device->cooling_dev->device.kobj, | |
1727 | "thermal_cooling"); | |
1728 | if (result) | |
1729 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1730 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1731 | &device->dev->dev.kobj, "device"); | |
1732 | if (result) | |
1733 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1734 | } |
1735 | ||
dce4ec2e AL |
1736 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1737 | { | |
1738 | struct acpi_video_device *dev; | |
1739 | union acpi_object *levels; | |
1740 | ||
1741 | mutex_lock(&video->device_list_lock); | |
1742 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
9f9cd7ee | 1743 | if (!acpi_video_device_lcd_query_levels(dev->dev->handle, &levels)) |
dce4ec2e AL |
1744 | kfree(levels); |
1745 | } | |
1746 | mutex_unlock(&video->device_list_lock); | |
1747 | } | |
1748 | ||
e50b9be1 AL |
1749 | static bool acpi_video_should_register_backlight(struct acpi_video_device *dev) |
1750 | { | |
1751 | /* | |
1752 | * Do not create backlight device for video output | |
1753 | * device that is not in the enumerated list. | |
1754 | */ | |
1755 | if (!acpi_video_device_in_dod(dev)) { | |
1756 | dev_dbg(&dev->dev->dev, "not in _DOD list, ignore\n"); | |
1757 | return false; | |
1758 | } | |
1759 | ||
1760 | if (only_lcd) | |
1761 | return dev->flags.lcd; | |
1762 | return true; | |
1763 | } | |
1764 | ||
67b662e1 AL |
1765 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1766 | { | |
1767 | struct acpi_video_device *dev; | |
1768 | ||
53a92ba7 HG |
1769 | if (video->backlight_registered) |
1770 | return 0; | |
1771 | ||
dce4ec2e AL |
1772 | acpi_video_run_bcl_for_osi(video); |
1773 | ||
3bd6bce3 | 1774 | if (acpi_video_get_backlight_type() != acpi_backlight_video) |
99678ed7 HG |
1775 | return 0; |
1776 | ||
67b662e1 | 1777 | mutex_lock(&video->device_list_lock); |
e50b9be1 AL |
1778 | list_for_each_entry(dev, &video->video_device_list, entry) { |
1779 | if (acpi_video_should_register_backlight(dev)) | |
1780 | acpi_video_dev_register_backlight(dev); | |
1781 | } | |
67b662e1 AL |
1782 | mutex_unlock(&video->device_list_lock); |
1783 | ||
99678ed7 HG |
1784 | video->backlight_registered = true; |
1785 | ||
67b662e1 AL |
1786 | video->pm_nb.notifier_call = acpi_video_resume; |
1787 | video->pm_nb.priority = 0; | |
1788 | return register_pm_notifier(&video->pm_nb); | |
1789 | } | |
1790 | ||
1791 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1792 | { | |
1793 | if (device->backlight) { | |
1794 | backlight_device_unregister(device->backlight); | |
1795 | device->backlight = NULL; | |
1796 | } | |
1797 | if (device->brightness) { | |
1798 | kfree(device->brightness->levels); | |
1799 | kfree(device->brightness); | |
1800 | device->brightness = NULL; | |
1801 | } | |
1802 | if (device->cooling_dev) { | |
1803 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1804 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1805 | thermal_cooling_device_unregister(device->cooling_dev); | |
1806 | device->cooling_dev = NULL; | |
1807 | } | |
1808 | } | |
1809 | ||
1810 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1811 | { | |
1812 | struct acpi_video_device *dev; | |
99678ed7 HG |
1813 | int error; |
1814 | ||
1815 | if (!video->backlight_registered) | |
1816 | return 0; | |
1817 | ||
1818 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1819 | |
1820 | mutex_lock(&video->device_list_lock); | |
1821 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1822 | acpi_video_dev_unregister_backlight(dev); | |
1823 | mutex_unlock(&video->device_list_lock); | |
1824 | ||
99678ed7 HG |
1825 | video->backlight_registered = false; |
1826 | ||
67b662e1 AL |
1827 | return error; |
1828 | } | |
1829 | ||
1830 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1831 | { | |
1832 | acpi_status status; | |
1833 | struct acpi_device *adev = device->dev; | |
1834 | ||
1835 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1836 | acpi_video_device_notify, device); | |
1837 | if (ACPI_FAILURE(status)) | |
1838 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1839 | else | |
1840 | device->flags.notify = 1; | |
1841 | } | |
1842 | ||
1843 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1844 | { | |
1845 | struct input_dev *input; | |
1846 | struct acpi_video_device *dev; | |
1847 | int error; | |
1848 | ||
1849 | video->input = input = input_allocate_device(); | |
1850 | if (!input) { | |
1851 | error = -ENOMEM; | |
1852 | goto out; | |
1853 | } | |
1854 | ||
1855 | error = acpi_video_bus_start_devices(video); | |
1856 | if (error) | |
1857 | goto err_free_input; | |
1858 | ||
1859 | snprintf(video->phys, sizeof(video->phys), | |
1860 | "%s/video/input0", acpi_device_hid(video->device)); | |
1861 | ||
1862 | input->name = acpi_device_name(video->device); | |
1863 | input->phys = video->phys; | |
1864 | input->id.bustype = BUS_HOST; | |
1865 | input->id.product = 0x06; | |
1866 | input->dev.parent = &video->device->dev; | |
1867 | input->evbit[0] = BIT(EV_KEY); | |
1868 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1869 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1870 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1871 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1872 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1873 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1874 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1875 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1876 | ||
1877 | error = input_register_device(input); | |
1878 | if (error) | |
1879 | goto err_stop_dev; | |
1880 | ||
1881 | mutex_lock(&video->device_list_lock); | |
1882 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1883 | acpi_video_dev_add_notify_handler(dev); | |
1884 | mutex_unlock(&video->device_list_lock); | |
1885 | ||
1886 | return 0; | |
1887 | ||
1888 | err_stop_dev: | |
1889 | acpi_video_bus_stop_devices(video); | |
1890 | err_free_input: | |
1891 | input_free_device(input); | |
1892 | video->input = NULL; | |
1893 | out: | |
1894 | return error; | |
1895 | } | |
1896 | ||
1897 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1898 | { | |
1899 | if (dev->flags.notify) { | |
1900 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1901 | acpi_video_device_notify); | |
1902 | dev->flags.notify = 0; | |
1903 | } | |
1904 | } | |
1905 | ||
1906 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1907 | { | |
1908 | struct acpi_video_device *dev; | |
1909 | ||
1910 | mutex_lock(&video->device_list_lock); | |
1911 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1912 | acpi_video_dev_remove_notify_handler(dev); | |
1913 | mutex_unlock(&video->device_list_lock); | |
1914 | ||
1915 | acpi_video_bus_stop_devices(video); | |
1916 | input_unregister_device(video->input); | |
1917 | video->input = NULL; | |
1918 | } | |
1919 | ||
1920 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1921 | { | |
1922 | struct acpi_video_device *dev, *next; | |
1923 | ||
1924 | mutex_lock(&video->device_list_lock); | |
1925 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1926 | list_del(&dev->entry); | |
1927 | kfree(dev); | |
1928 | } | |
1929 | mutex_unlock(&video->device_list_lock); | |
1930 | ||
1931 | return 0; | |
1932 | } | |
1933 | ||
ac7729da RW |
1934 | static int instance; |
1935 | ||
4be44fcd | 1936 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1937 | { |
f51e8391 | 1938 | struct acpi_video_bus *video; |
f51e8391 | 1939 | int error; |
c504f8cb ZR |
1940 | acpi_status status; |
1941 | ||
1942 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1943 | device->parent->handle, 1, | |
1944 | acpi_video_bus_match, NULL, | |
1945 | device, NULL); | |
1946 | if (status == AE_ALREADY_EXISTS) { | |
1947 | printk(KERN_WARNING FW_BUG | |
1948 | "Duplicate ACPI video bus devices for the" | |
1949 | " same VGA controller, please try module " | |
1950 | "parameter \"video.allow_duplicates=1\"" | |
1951 | "if the current driver doesn't work.\n"); | |
1952 | if (!allow_duplicates) | |
1953 | return -ENODEV; | |
1954 | } | |
1da177e4 | 1955 | |
36bcbec7 | 1956 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1957 | if (!video) |
d550d98d | 1958 | return -ENOMEM; |
1da177e4 | 1959 | |
e6d9da1d ZR |
1960 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1961 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1962 | if (instance) | |
1963 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1964 | instance++; |
e6d9da1d | 1965 | } |
f3b39f13 ZY |
1966 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1967 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1968 | if (instance) | |
1969 | device->pnp.bus_id[3] = '0' + instance; | |
1970 | instance++; | |
1971 | } | |
e6d9da1d | 1972 | |
e6afa0de | 1973 | video->device = device; |
1da177e4 LT |
1974 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1975 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1976 | device->driver_data = video; |
1da177e4 LT |
1977 | |
1978 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1979 | error = acpi_video_bus_check(video); |
1980 | if (error) | |
1981 | goto err_free_video; | |
1da177e4 | 1982 | |
bbac81f5 | 1983 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1984 | INIT_LIST_HEAD(&video->video_device_list); |
1985 | ||
ea9f8856 IM |
1986 | error = acpi_video_bus_get_devices(video, device); |
1987 | if (error) | |
91e13aa3 | 1988 | goto err_put_video; |
1da177e4 | 1989 | |
1da177e4 | 1990 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1991 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1992 | video->flags.multihead ? "yes" : "no", | |
1993 | video->flags.rom ? "yes" : "no", | |
1994 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1995 | mutex_lock(&video_list_lock); |
1996 | list_add_tail(&video->entry, &video_bus_head); | |
1997 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1998 | |
67b662e1 AL |
1999 | acpi_video_bus_register_backlight(video); |
2000 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 2001 | |
f51e8391 DT |
2002 | return 0; |
2003 | ||
67b662e1 | 2004 | err_put_video: |
f51e8391 DT |
2005 | acpi_video_bus_put_devices(video); |
2006 | kfree(video->attached_array); | |
67b662e1 | 2007 | err_free_video: |
f51e8391 | 2008 | kfree(video); |
db89b4f0 | 2009 | device->driver_data = NULL; |
1da177e4 | 2010 | |
f51e8391 | 2011 | return error; |
1da177e4 LT |
2012 | } |
2013 | ||
51fac838 | 2014 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 2015 | { |
4be44fcd | 2016 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2017 | |
1da177e4 LT |
2018 | |
2019 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2020 | return -EINVAL; |
1da177e4 | 2021 | |
50dd0969 | 2022 | video = acpi_driver_data(device); |
1da177e4 | 2023 | |
67b662e1 AL |
2024 | acpi_video_bus_remove_notify_handler(video); |
2025 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 2026 | acpi_video_bus_put_devices(video); |
1da177e4 | 2027 | |
67b662e1 AL |
2028 | mutex_lock(&video_list_lock); |
2029 | list_del(&video->entry); | |
2030 | mutex_unlock(&video_list_lock); | |
2031 | ||
6044ec88 | 2032 | kfree(video->attached_array); |
1da177e4 LT |
2033 | kfree(video); |
2034 | ||
d550d98d | 2035 | return 0; |
1da177e4 LT |
2036 | } |
2037 | ||
c6996bdd AC |
2038 | static int __init is_i740(struct pci_dev *dev) |
2039 | { | |
2040 | if (dev->device == 0x00D1) | |
2041 | return 1; | |
2042 | if (dev->device == 0x7000) | |
2043 | return 1; | |
2044 | return 0; | |
2045 | } | |
2046 | ||
74a365b3 MG |
2047 | static int __init intel_opregion_present(void) |
2048 | { | |
c6996bdd | 2049 | int opregion = 0; |
74a365b3 MG |
2050 | struct pci_dev *dev = NULL; |
2051 | u32 address; | |
2052 | ||
2053 | for_each_pci_dev(dev) { | |
2054 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2055 | continue; | |
2056 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2057 | continue; | |
c6996bdd AC |
2058 | /* We don't want to poke around undefined i740 registers */ |
2059 | if (is_i740(dev)) | |
2060 | continue; | |
74a365b3 MG |
2061 | pci_read_config_dword(dev, 0xfc, &address); |
2062 | if (!address) | |
2063 | continue; | |
c6996bdd | 2064 | opregion = 1; |
74a365b3 | 2065 | } |
c6996bdd | 2066 | return opregion; |
74a365b3 MG |
2067 | } |
2068 | ||
8e5c2b77 | 2069 | int acpi_video_register(void) |
1da177e4 | 2070 | { |
2a8b18e9 | 2071 | int ret = 0; |
28d63403 | 2072 | |
970530cd HG |
2073 | mutex_lock(®ister_count_mutex); |
2074 | if (register_count) { | |
86e437f0 | 2075 | /* |
8e5c2b77 RW |
2076 | * if the function of acpi_video_register is already called, |
2077 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 | 2078 | */ |
2a8b18e9 | 2079 | goto leave; |
86e437f0 | 2080 | } |
1da177e4 | 2081 | |
7ee33baa HG |
2082 | dmi_check_system(video_dmi_table); |
2083 | ||
28d63403 CW |
2084 | ret = acpi_bus_register_driver(&acpi_video_bus); |
2085 | if (ret) | |
2a8b18e9 | 2086 | goto leave; |
1da177e4 | 2087 | |
86e437f0 ZY |
2088 | /* |
2089 | * When the acpi_video_bus is loaded successfully, increase | |
2090 | * the counter reference. | |
2091 | */ | |
970530cd | 2092 | register_count = 1; |
86e437f0 | 2093 | |
2a8b18e9 | 2094 | leave: |
970530cd | 2095 | mutex_unlock(®ister_count_mutex); |
2a8b18e9 | 2096 | return ret; |
1da177e4 | 2097 | } |
8e5c2b77 | 2098 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2099 | |
86e437f0 ZY |
2100 | void acpi_video_unregister(void) |
2101 | { | |
970530cd HG |
2102 | mutex_lock(®ister_count_mutex); |
2103 | if (register_count) { | |
2a8b18e9 | 2104 | acpi_bus_unregister_driver(&acpi_video_bus); |
970530cd | 2105 | register_count = 0; |
86e437f0 | 2106 | } |
970530cd | 2107 | mutex_unlock(®ister_count_mutex); |
86e437f0 ZY |
2108 | } |
2109 | EXPORT_SYMBOL(acpi_video_unregister); | |
2110 | ||
1b7f37e1 HG |
2111 | void acpi_video_unregister_backlight(void) |
2112 | { | |
2113 | struct acpi_video_bus *video; | |
2114 | ||
970530cd HG |
2115 | mutex_lock(®ister_count_mutex); |
2116 | if (register_count) { | |
2a8b18e9 HG |
2117 | mutex_lock(&video_list_lock); |
2118 | list_for_each_entry(video, &video_bus_head, entry) | |
2119 | acpi_video_bus_unregister_backlight(video); | |
2120 | mutex_unlock(&video_list_lock); | |
2121 | } | |
970530cd | 2122 | mutex_unlock(®ister_count_mutex); |
1b7f37e1 | 2123 | } |
1b7f37e1 | 2124 | |
90b066b1 HG |
2125 | bool acpi_video_handles_brightness_key_presses(void) |
2126 | { | |
2127 | bool have_video_busses; | |
2128 | ||
2129 | mutex_lock(&video_list_lock); | |
2130 | have_video_busses = !list_empty(&video_bus_head); | |
2131 | mutex_unlock(&video_list_lock); | |
2132 | ||
05bc59a0 HG |
2133 | return have_video_busses && |
2134 | (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS); | |
90b066b1 HG |
2135 | } |
2136 | EXPORT_SYMBOL(acpi_video_handles_brightness_key_presses); | |
2137 | ||
74a365b3 MG |
2138 | /* |
2139 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2140 | * the video opregion code to be run first in order to initialise | |
2141 | * state before any ACPI video calls are made. To handle this we defer | |
2142 | * registration of the video class until the opregion code has run. | |
2143 | */ | |
2144 | ||
2145 | static int __init acpi_video_init(void) | |
2146 | { | |
6e17cb12 CW |
2147 | /* |
2148 | * Let the module load even if ACPI is disabled (e.g. due to | |
2149 | * a broken BIOS) so that i915.ko can still be loaded on such | |
2150 | * old systems without an AcpiOpRegion. | |
2151 | * | |
2152 | * acpi_video_register() will report -ENODEV later as well due | |
2153 | * to acpi_disabled when i915.ko tries to register itself afterwards. | |
2154 | */ | |
2155 | if (acpi_disabled) | |
2156 | return 0; | |
2157 | ||
74a365b3 MG |
2158 | if (intel_opregion_present()) |
2159 | return 0; | |
2160 | ||
2161 | return acpi_video_register(); | |
2162 | } | |
1da177e4 | 2163 | |
86e437f0 | 2164 | static void __exit acpi_video_exit(void) |
1da177e4 | 2165 | { |
93a291df | 2166 | acpi_video_detect_exit(); |
86e437f0 | 2167 | acpi_video_unregister(); |
1da177e4 | 2168 | |
d550d98d | 2169 | return; |
1da177e4 LT |
2170 | } |
2171 | ||
2172 | module_init(acpi_video_init); | |
2173 | module_exit(acpi_video_exit); |