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