Commit | Line | Data |
---|---|---|
c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
21fcb34e | 3 | * video.c - ACPI Video Driver |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
6 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 7 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/list.h> | |
bbac81f5 | 15 | #include <linux/mutex.h> |
e9dab196 | 16 | #include <linux/input.h> |
2f3d000a | 17 | #include <linux/backlight.h> |
702ed512 | 18 | #include <linux/thermal.h> |
935e5f29 | 19 | #include <linux/sort.h> |
74a365b3 MG |
20 | #include <linux/pci.h> |
21 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
eb27cae8 | 23 | #include <linux/dmi.h> |
ac7729da | 24 | #include <linux/suspend.h> |
8b48463f | 25 | #include <linux/acpi.h> |
e92a7162 | 26 | #include <acpi/video.h> |
7c0f6ba6 | 27 | #include <linux/uaccess.h> |
1da177e4 | 28 | |
14ca7a47 | 29 | #define PREFIX "ACPI: " |
8c5bd7ad | 30 | |
1da177e4 LT |
31 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
32 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
1da177e4 | 33 | |
2f3d000a | 34 | #define MAX_NAME_LEN 20 |
1da177e4 | 35 | |
1da177e4 | 36 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 37 | ACPI_MODULE_NAME("video"); |
1da177e4 | 38 | |
f52fd66d | 39 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 40 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
41 | MODULE_LICENSE("GPL"); |
42 | ||
97e45dd6 | 43 | static bool brightness_switch_enabled = true; |
8a681a4d ZR |
44 | module_param(brightness_switch_enabled, bool, 0644); |
45 | ||
c504f8cb ZR |
46 | /* |
47 | * By default, we don't allow duplicate ACPI video bus devices | |
48 | * under the same VGA controller | |
49 | */ | |
90ab5ee9 | 50 | static bool allow_duplicates; |
c504f8cb ZR |
51 | module_param(allow_duplicates, bool, 0644); |
52 | ||
654a182d HG |
53 | static int disable_backlight_sysfs_if = -1; |
54 | module_param(disable_backlight_sysfs_if, int, 0444); | |
55 | ||
05bc59a0 HG |
56 | #define REPORT_OUTPUT_KEY_EVENTS 0x01 |
57 | #define REPORT_BRIGHTNESS_KEY_EVENTS 0x02 | |
58 | static int report_key_events = -1; | |
59 | module_param(report_key_events, int, 0644); | |
60 | MODULE_PARM_DESC(report_key_events, | |
61 | "0: none, 1: output changes, 2: brightness changes, 3: all"); | |
62 | ||
4f7f9645 HG |
63 | static int hw_changes_brightness = -1; |
64 | module_param(hw_changes_brightness, int, 0644); | |
65 | MODULE_PARM_DESC(hw_changes_brightness, | |
66 | "Set this to 1 on buggy hw which changes the brightness itself when " | |
67 | "a hotkey is pressed: -1: auto, 0: normal 1: hw-changes-brightness"); | |
68 | ||
592c8095 DF |
69 | /* |
70 | * Whether the struct acpi_video_device_attrib::device_id_scheme bit should be | |
71 | * assumed even if not actually set. | |
72 | */ | |
e50b9be1 AL |
73 | static bool device_id_scheme = false; |
74 | module_param(device_id_scheme, bool, 0444); | |
75 | ||
5928c281 HG |
76 | static int only_lcd = -1; |
77 | module_param(only_lcd, int, 0444); | |
e50b9be1 | 78 | |
970530cd HG |
79 | static int register_count; |
80 | static DEFINE_MUTEX(register_count_mutex); | |
14e93553 HG |
81 | static DEFINE_MUTEX(video_list_lock); |
82 | static LIST_HEAD(video_bus_head); | |
4be44fcd | 83 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 84 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 85 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
93a291df | 86 | void acpi_video_detect_exit(void); |
1da177e4 | 87 | |
d485ef43 DF |
88 | /* |
89 | * Indices in the _BCL method response: the first two items are special, | |
90 | * the rest are all supported levels. | |
91 | * | |
92 | * See page 575 of the ACPI spec 3.0 | |
93 | */ | |
94 | enum acpi_video_level_idx { | |
95 | ACPI_VIDEO_AC_LEVEL, /* level when machine has full power */ | |
96 | ACPI_VIDEO_BATTERY_LEVEL, /* level when machine is on batteries */ | |
97 | ACPI_VIDEO_FIRST_LEVEL, /* actual supported levels begin here */ | |
98 | }; | |
99 | ||
1ba90e3a TR |
100 | static const struct acpi_device_id video_device_ids[] = { |
101 | {ACPI_VIDEO_HID, 0}, | |
102 | {"", 0}, | |
103 | }; | |
104 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
105 | ||
1da177e4 | 106 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 107 | .name = "video", |
1da177e4 | 108 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 109 | .ids = video_device_ids, |
1da177e4 LT |
110 | .ops = { |
111 | .add = acpi_video_bus_add, | |
112 | .remove = acpi_video_bus_remove, | |
7015558f | 113 | .notify = acpi_video_bus_notify, |
4be44fcd | 114 | }, |
1da177e4 LT |
115 | }; |
116 | ||
117 | struct acpi_video_bus_flags { | |
4be44fcd LB |
118 | u8 multihead:1; /* can switch video heads */ |
119 | u8 rom:1; /* can retrieve a video rom */ | |
120 | u8 post:1; /* can configure the head to */ | |
121 | u8 reserved:5; | |
1da177e4 LT |
122 | }; |
123 | ||
124 | struct acpi_video_bus_cap { | |
21fcb34e FC |
125 | u8 _DOS:1; /* Enable/Disable output switching */ |
126 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
127 | u8 _ROM:1; /* Get ROM Data */ | |
128 | u8 _GPD:1; /* Get POST Device */ | |
129 | u8 _SPD:1; /* Set POST Device */ | |
130 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 131 | u8 reserved:2; |
1da177e4 LT |
132 | }; |
133 | ||
4be44fcd LB |
134 | struct acpi_video_device_attrib { |
135 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
136 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
137 | u32 display_type:4; /* Describe the specific type in use */ | |
138 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
139 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
140 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 141 | the VGA device. */ |
21fcb34e FC |
142 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
143 | u32 reserved:10; /* Must be 0 */ | |
592c8095 DF |
144 | |
145 | /* | |
146 | * The device ID might not actually follow the scheme described by this | |
147 | * struct acpi_video_device_attrib. If it does, then this bit | |
148 | * device_id_scheme is set; otherwise, other fields should be ignored. | |
149 | * | |
150 | * (but also see the global flag device_id_scheme) | |
151 | */ | |
152 | u32 device_id_scheme:1; | |
1da177e4 LT |
153 | }; |
154 | ||
155 | struct acpi_video_enumerated_device { | |
156 | union { | |
157 | u32 int_val; | |
4be44fcd | 158 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
159 | } value; |
160 | struct acpi_video_device *bind_info; | |
161 | }; | |
162 | ||
163 | struct acpi_video_bus { | |
e6afa0de | 164 | struct acpi_device *device; |
99678ed7 | 165 | bool backlight_registered; |
4be44fcd | 166 | u8 dos_setting; |
1da177e4 | 167 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd | 168 | u8 attached_count; |
b4df4636 | 169 | u8 child_count; |
4be44fcd | 170 | struct acpi_video_bus_cap cap; |
1da177e4 | 171 | struct acpi_video_bus_flags flags; |
4be44fcd | 172 | struct list_head video_device_list; |
bbac81f5 | 173 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 174 | struct list_head entry; |
e9dab196 LY |
175 | struct input_dev *input; |
176 | char phys[32]; /* for input device */ | |
ac7729da | 177 | struct notifier_block pm_nb; |
1da177e4 LT |
178 | }; |
179 | ||
180 | struct acpi_video_device_flags { | |
4be44fcd LB |
181 | u8 crt:1; |
182 | u8 lcd:1; | |
183 | u8 tvout:1; | |
82cae999 | 184 | u8 dvi:1; |
4be44fcd LB |
185 | u8 bios:1; |
186 | u8 unknown:1; | |
91e13aa3 AL |
187 | u8 notify:1; |
188 | u8 reserved:1; | |
1da177e4 LT |
189 | }; |
190 | ||
191 | struct acpi_video_device_cap { | |
21fcb34e FC |
192 | u8 _ADR:1; /* Return the unique ID */ |
193 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
194 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 195 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 196 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 197 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
198 | }; |
199 | ||
1da177e4 | 200 | struct acpi_video_device { |
4be44fcd LB |
201 | unsigned long device_id; |
202 | struct acpi_video_device_flags flags; | |
203 | struct acpi_video_device_cap cap; | |
204 | struct list_head entry; | |
8ab58e8e LT |
205 | struct delayed_work switch_brightness_work; |
206 | int switch_brightness_event; | |
4be44fcd LB |
207 | struct acpi_video_bus *video; |
208 | struct acpi_device *dev; | |
1da177e4 | 209 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 210 | struct backlight_device *backlight; |
4a703a8f | 211 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
212 | }; |
213 | ||
4be44fcd LB |
214 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
215 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
216 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
217 | struct acpi_video_device *device); | |
1da177e4 | 218 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
219 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
220 | int level); | |
221 | static int acpi_video_device_lcd_get_level_current( | |
222 | struct acpi_video_device *device, | |
a89803df | 223 | unsigned long long *level, bool raw); |
4be44fcd LB |
224 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
225 | u32 level_current, u32 event); | |
8ab58e8e | 226 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 227 | |
21fcb34e | 228 | /* backlight device sysfs support */ |
2f3d000a YL |
229 | static int acpi_video_get_brightness(struct backlight_device *bd) |
230 | { | |
27663c58 | 231 | unsigned long long cur_level; |
38531e6f | 232 | int i; |
7c364e79 | 233 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 234 | |
a89803df | 235 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 236 | return -EINVAL; |
d485ef43 | 237 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < vd->brightness->count; i++) { |
38531e6f | 238 | if (vd->brightness->levels[i] == cur_level) |
d485ef43 | 239 | return i - ACPI_VIDEO_FIRST_LEVEL; |
38531e6f MG |
240 | } |
241 | return 0; | |
2f3d000a YL |
242 | } |
243 | ||
244 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
245 | { | |
d485ef43 | 246 | int request_level = bd->props.brightness + ACPI_VIDEO_FIRST_LEVEL; |
7c364e79 | 247 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 248 | |
8ab58e8e | 249 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
250 | return acpi_video_device_lcd_set_level(vd, |
251 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
252 | } |
253 | ||
acc2472e | 254 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
255 | .get_brightness = acpi_video_get_brightness, |
256 | .update_status = acpi_video_set_brightness, | |
257 | }; | |
258 | ||
702ed512 | 259 | /* thermal cooling device callbacks */ |
d485ef43 DF |
260 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, |
261 | unsigned long *state) | |
702ed512 | 262 | { |
4a703a8f | 263 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
264 | struct acpi_video_device *video = acpi_driver_data(device); |
265 | ||
d485ef43 | 266 | *state = video->brightness->count - ACPI_VIDEO_FIRST_LEVEL - 1; |
6503e5df | 267 | return 0; |
702ed512 ZR |
268 | } |
269 | ||
d485ef43 DF |
270 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, |
271 | unsigned long *state) | |
702ed512 | 272 | { |
4a703a8f | 273 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 274 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 275 | unsigned long long level; |
6503e5df | 276 | int offset; |
702ed512 | 277 | |
a89803df | 278 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 279 | return -EINVAL; |
d485ef43 DF |
280 | for (offset = ACPI_VIDEO_FIRST_LEVEL; offset < video->brightness->count; |
281 | offset++) | |
6503e5df MG |
282 | if (level == video->brightness->levels[offset]) { |
283 | *state = video->brightness->count - offset - 1; | |
284 | return 0; | |
285 | } | |
702ed512 ZR |
286 | |
287 | return -EINVAL; | |
288 | } | |
289 | ||
290 | static int | |
4a703a8f | 291 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 292 | { |
4a703a8f | 293 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
294 | struct acpi_video_device *video = acpi_driver_data(device); |
295 | int level; | |
296 | ||
d485ef43 | 297 | if (state >= video->brightness->count - ACPI_VIDEO_FIRST_LEVEL) |
702ed512 ZR |
298 | return -EINVAL; |
299 | ||
300 | state = video->brightness->count - state; | |
915ea7e4 | 301 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
302 | return acpi_video_device_lcd_set_level(video, level); |
303 | } | |
304 | ||
9c8b04be | 305 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
306 | .get_max_state = video_get_max_state, |
307 | .get_cur_state = video_get_cur_state, | |
308 | .set_cur_state = video_set_cur_state, | |
309 | }; | |
310 | ||
21fcb34e FC |
311 | /* |
312 | * -------------------------------------------------------------------------- | |
313 | * Video Management | |
314 | * -------------------------------------------------------------------------- | |
315 | */ | |
1da177e4 | 316 | |
1da177e4 | 317 | static int |
05950094 | 318 | acpi_video_device_lcd_query_levels(acpi_handle handle, |
4be44fcd | 319 | union acpi_object **levels) |
1da177e4 | 320 | { |
4be44fcd LB |
321 | int status; |
322 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
323 | union acpi_object *obj; | |
1da177e4 | 324 | |
1da177e4 LT |
325 | |
326 | *levels = NULL; | |
327 | ||
05950094 | 328 | status = acpi_evaluate_object(handle, "_BCL", NULL, &buffer); |
1da177e4 | 329 | if (!ACPI_SUCCESS(status)) |
d550d98d | 330 | return status; |
4be44fcd | 331 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 332 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 333 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
334 | status = -EFAULT; |
335 | goto err; | |
336 | } | |
337 | ||
338 | *levels = obj; | |
339 | ||
d550d98d | 340 | return 0; |
1da177e4 | 341 | |
915ea7e4 | 342 | err: |
6044ec88 | 343 | kfree(buffer.pointer); |
1da177e4 | 344 | |
d550d98d | 345 | return status; |
1da177e4 LT |
346 | } |
347 | ||
348 | static int | |
4be44fcd | 349 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 350 | { |
24450c7a | 351 | int status; |
9e6dada9 | 352 | int state; |
1da177e4 | 353 | |
0db98202 JL |
354 | status = acpi_execute_simple_method(device->dev->handle, |
355 | "_BCM", level); | |
24450c7a ZR |
356 | if (ACPI_FAILURE(status)) { |
357 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
358 | return -EIO; | |
359 | } | |
360 | ||
4500ca8e | 361 | device->brightness->curr = level; |
d485ef43 DF |
362 | for (state = ACPI_VIDEO_FIRST_LEVEL; state < device->brightness->count; |
363 | state++) | |
24450c7a | 364 | if (level == device->brightness->levels[state]) { |
1a7c618a | 365 | if (device->backlight) |
d485ef43 DF |
366 | device->backlight->props.brightness = |
367 | state - ACPI_VIDEO_FIRST_LEVEL; | |
24450c7a ZR |
368 | return 0; |
369 | } | |
9e6dada9 | 370 | |
24450c7a ZR |
371 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
372 | return -EINVAL; | |
1da177e4 LT |
373 | } |
374 | ||
45cb50e6 ZR |
375 | /* |
376 | * For some buggy _BQC methods, we need to add a constant value to | |
377 | * the _BQC return value to get the actual current brightness level | |
378 | */ | |
379 | ||
380 | static int bqc_offset_aml_bug_workaround; | |
7ee33baa | 381 | static int video_set_bqc_offset(const struct dmi_system_id *d) |
45cb50e6 ZR |
382 | { |
383 | bqc_offset_aml_bug_workaround = 9; | |
384 | return 0; | |
385 | } | |
386 | ||
7ee33baa | 387 | static int video_disable_backlight_sysfs_if( |
654a182d HG |
388 | const struct dmi_system_id *d) |
389 | { | |
390 | if (disable_backlight_sysfs_if == -1) | |
391 | disable_backlight_sysfs_if = 1; | |
392 | return 0; | |
393 | } | |
394 | ||
e50b9be1 AL |
395 | static int video_set_device_id_scheme(const struct dmi_system_id *d) |
396 | { | |
397 | device_id_scheme = true; | |
398 | return 0; | |
399 | } | |
400 | ||
401 | static int video_enable_only_lcd(const struct dmi_system_id *d) | |
402 | { | |
403 | only_lcd = true; | |
404 | return 0; | |
405 | } | |
406 | ||
4b4b3b20 HG |
407 | static int video_set_report_key_events(const struct dmi_system_id *id) |
408 | { | |
409 | if (report_key_events == -1) | |
410 | report_key_events = (uintptr_t)id->driver_data; | |
411 | return 0; | |
412 | } | |
413 | ||
4f7f9645 HG |
414 | static int video_hw_changes_brightness( |
415 | const struct dmi_system_id *d) | |
416 | { | |
417 | if (hw_changes_brightness == -1) | |
418 | hw_changes_brightness = 1; | |
419 | return 0; | |
420 | } | |
421 | ||
6faadbbb | 422 | static const 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 | }, | |
4f7f9645 HG |
546 | /* |
547 | * Some machines change the brightness themselves when a brightness | |
548 | * hotkey gets pressed, despite us telling them not to. In this case | |
549 | * acpi_video_device_notify() should only call backlight_force_update( | |
550 | * BACKLIGHT_UPDATE_HOTKEY) and not do anything else. | |
551 | */ | |
552 | { | |
553 | /* https://bugzilla.kernel.org/show_bug.cgi?id=204077 */ | |
554 | .callback = video_hw_changes_brightness, | |
555 | .ident = "Packard Bell EasyNote MZ35", | |
556 | .matches = { | |
557 | DMI_MATCH(DMI_SYS_VENDOR, "Packard Bell"), | |
558 | DMI_MATCH(DMI_PRODUCT_NAME, "EasyNote MZ35"), | |
559 | }, | |
560 | }, | |
45cb50e6 ZR |
561 | {} |
562 | }; | |
563 | ||
994fa63c DB |
564 | static unsigned long long |
565 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
566 | unsigned long long bqc_value) | |
567 | { | |
568 | unsigned long long level; | |
569 | ||
570 | if (device->brightness->flags._BQC_use_index) { | |
571 | /* | |
d485ef43 DF |
572 | * _BQC returns an index that doesn't account for the first 2 |
573 | * items with special meaning (see enum acpi_video_level_idx), | |
574 | * so we need to compensate for that by offsetting ourselves | |
994fa63c DB |
575 | */ |
576 | if (device->brightness->flags._BCL_reversed) | |
d485ef43 DF |
577 | bqc_value = device->brightness->count - |
578 | ACPI_VIDEO_FIRST_LEVEL - 1 - bqc_value; | |
994fa63c | 579 | |
d485ef43 DF |
580 | level = device->brightness->levels[bqc_value + |
581 | ACPI_VIDEO_FIRST_LEVEL]; | |
994fa63c DB |
582 | } else { |
583 | level = bqc_value; | |
584 | } | |
585 | ||
586 | level += bqc_offset_aml_bug_workaround; | |
587 | ||
588 | return level; | |
589 | } | |
590 | ||
1da177e4 | 591 | static int |
4be44fcd | 592 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 593 | unsigned long long *level, bool raw) |
1da177e4 | 594 | { |
c8890f90 | 595 | acpi_status status = AE_OK; |
4e231fa4 | 596 | int i; |
c8890f90 | 597 | |
c60d638e ZR |
598 | if (device->cap._BQC || device->cap._BCQ) { |
599 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
600 | ||
601 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
602 | NULL, level); |
603 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
604 | if (raw) { |
605 | /* | |
606 | * Caller has indicated he wants the raw | |
607 | * value returned by _BQC, so don't furtherly | |
608 | * mess with the value. | |
609 | */ | |
610 | return 0; | |
611 | } | |
612 | ||
994fa63c | 613 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 614 | |
d485ef43 DF |
615 | for (i = ACPI_VIDEO_FIRST_LEVEL; |
616 | i < device->brightness->count; i++) | |
4e231fa4 VS |
617 | if (device->brightness->levels[i] == *level) { |
618 | device->brightness->curr = *level; | |
619 | return 0; | |
915ea7e4 | 620 | } |
a89803df DB |
621 | /* |
622 | * BQC returned an invalid level. | |
623 | * Stop using it. | |
624 | */ | |
625 | ACPI_WARNING((AE_INFO, | |
626 | "%s returned an invalid level", | |
627 | buf)); | |
628 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 629 | } else { |
21fcb34e FC |
630 | /* |
631 | * Fixme: | |
c8890f90 ZR |
632 | * should we return an error or ignore this failure? |
633 | * dev->brightness->curr is a cached value which stores | |
634 | * the correct current backlight level in most cases. | |
635 | * ACPI video backlight still works w/ buggy _BQC. | |
636 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
637 | */ | |
c60d638e ZR |
638 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
639 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
640 | } |
641 | } | |
642 | ||
4500ca8e | 643 | *level = device->brightness->curr; |
c8890f90 | 644 | return 0; |
1da177e4 LT |
645 | } |
646 | ||
647 | static int | |
4be44fcd LB |
648 | acpi_video_device_EDID(struct acpi_video_device *device, |
649 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 650 | { |
4be44fcd LB |
651 | int status; |
652 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
653 | union acpi_object *obj; | |
654 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
655 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 656 | |
1da177e4 LT |
657 | |
658 | *edid = NULL; | |
659 | ||
660 | if (!device) | |
d550d98d | 661 | return -ENODEV; |
1da177e4 LT |
662 | if (length == 128) |
663 | arg0.integer.value = 1; | |
664 | else if (length == 256) | |
665 | arg0.integer.value = 2; | |
666 | else | |
d550d98d | 667 | return -EINVAL; |
1da177e4 | 668 | |
90130268 | 669 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 670 | if (ACPI_FAILURE(status)) |
d550d98d | 671 | return -ENODEV; |
1da177e4 | 672 | |
50dd0969 | 673 | obj = buffer.pointer; |
1da177e4 LT |
674 | |
675 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
676 | *edid = obj; | |
677 | else { | |
6468463a | 678 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
679 | status = -EFAULT; |
680 | kfree(obj); | |
681 | } | |
682 | ||
d550d98d | 683 | return status; |
1da177e4 LT |
684 | } |
685 | ||
1da177e4 LT |
686 | /* bus */ |
687 | ||
1da177e4 LT |
688 | /* |
689 | * Arg: | |
21fcb34e FC |
690 | * video : video bus device pointer |
691 | * bios_flag : | |
1da177e4 LT |
692 | * 0. The system BIOS should NOT automatically switch(toggle) |
693 | * the active display output. | |
694 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 695 | * active display output. No switch event. |
1da177e4 LT |
696 | * 2. The _DGS value should be locked. |
697 | * 3. The system BIOS should not automatically switch (toggle) the | |
698 | * active display output, but instead generate the display switch | |
699 | * event notify code. | |
700 | * lcd_flag : | |
701 | * 0. The system BIOS should automatically control the brightness level | |
b5b42b24 KP |
702 | * of the LCD when: |
703 | * - the power changes from AC to DC (ACPI appendix B) | |
704 | * - a brightness hotkey gets pressed (implied by Win7/8 backlight docs) | |
21fcb34e | 705 | * 1. The system BIOS should NOT automatically control the brightness |
b5b42b24 KP |
706 | * level of the LCD when: |
707 | * - the power changes from AC to DC (ACPI appendix B) | |
708 | * - a brightness hotkey gets pressed (implied by Win7/8 backlight docs) | |
21fcb34e | 709 | * Return Value: |
ea9f8856 | 710 | * -EINVAL wrong arg. |
1da177e4 LT |
711 | */ |
712 | ||
713 | static int | |
4be44fcd | 714 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 715 | { |
ea9f8856 | 716 | acpi_status status; |
1da177e4 | 717 | |
b0373843 ZR |
718 | if (!video->cap._DOS) |
719 | return 0; | |
1da177e4 | 720 | |
ea9f8856 IM |
721 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
722 | return -EINVAL; | |
0db98202 JL |
723 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
724 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
725 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
726 | if (ACPI_FAILURE(status)) |
727 | return -EIO; | |
1da177e4 | 728 | |
ea9f8856 | 729 | return 0; |
1da177e4 LT |
730 | } |
731 | ||
935e5f29 ZR |
732 | /* |
733 | * Simple comparison function used to sort backlight levels. | |
734 | */ | |
735 | ||
736 | static int | |
737 | acpi_video_cmp_level(const void *a, const void *b) | |
738 | { | |
739 | return *(int *)a - *(int *)b; | |
740 | } | |
741 | ||
a50188da AL |
742 | /* |
743 | * Decides if _BQC/_BCQ for this system is usable | |
744 | * | |
745 | * We do this by changing the level first and then read out the current | |
746 | * brightness level, if the value does not match, find out if it is using | |
747 | * index. If not, clear the _BQC/_BCQ capability. | |
748 | */ | |
749 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
750 | int max_level, int current_level) | |
751 | { | |
752 | struct acpi_video_device_brightness *br = device->brightness; | |
753 | int result; | |
754 | unsigned long long level; | |
755 | int test_level; | |
756 | ||
757 | /* don't mess with existing known broken systems */ | |
758 | if (bqc_offset_aml_bug_workaround) | |
759 | return 0; | |
760 | ||
761 | /* | |
762 | * Some systems always report current brightness level as maximum | |
592c8095 DF |
763 | * through _BQC, we need to test another value for them. However, |
764 | * there is a subtlety: | |
765 | * | |
766 | * If the _BCL package ordering is descending, the first level | |
767 | * (br->levels[2]) is likely to be 0, and if the number of levels | |
768 | * matches the number of steps, we might confuse a returned level to | |
769 | * mean the index. | |
770 | * | |
771 | * For example: | |
772 | * | |
773 | * current_level = max_level = 100 | |
774 | * test_level = 0 | |
775 | * returned level = 100 | |
776 | * | |
777 | * In this case 100 means the level, not the index, and _BCM failed. | |
778 | * Still, if the _BCL package ordering is descending, the index of | |
779 | * level 0 is also 100, so we assume _BQC is indexed, when it's not. | |
780 | * | |
781 | * This causes all _BQC calls to return bogus values causing weird | |
782 | * behavior from the user's perspective. For example: | |
783 | * | |
784 | * xbacklight -set 10; xbacklight -set 20; | |
785 | * | |
786 | * would flash to 90% and then slowly down to the desired level (20). | |
787 | * | |
788 | * The solution is simple; test anything other than the first level | |
789 | * (e.g. 1). | |
a50188da | 790 | */ |
d485ef43 DF |
791 | test_level = current_level == max_level |
792 | ? br->levels[ACPI_VIDEO_FIRST_LEVEL + 1] | |
793 | : max_level; | |
a50188da AL |
794 | |
795 | result = acpi_video_device_lcd_set_level(device, test_level); | |
796 | if (result) | |
797 | return result; | |
798 | ||
799 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
800 | if (result) | |
801 | return result; | |
802 | ||
803 | if (level != test_level) { | |
804 | /* buggy _BQC found, need to find out if it uses index */ | |
805 | if (level < br->count) { | |
806 | if (br->flags._BCL_reversed) | |
d485ef43 DF |
807 | level = br->count - ACPI_VIDEO_FIRST_LEVEL - 1 - level; |
808 | if (br->levels[level + ACPI_VIDEO_FIRST_LEVEL] == test_level) | |
a50188da AL |
809 | br->flags._BQC_use_index = 1; |
810 | } | |
811 | ||
812 | if (!br->flags._BQC_use_index) | |
813 | device->cap._BQC = device->cap._BCQ = 0; | |
814 | } | |
815 | ||
816 | return 0; | |
817 | } | |
818 | ||
05950094 | 819 | int acpi_video_get_levels(struct acpi_device *device, |
9f9cd7ee AL |
820 | struct acpi_video_device_brightness **dev_br, |
821 | int *pmax_level) | |
469778c1 JJ |
822 | { |
823 | union acpi_object *obj = NULL; | |
d32f6947 | 824 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
469778c1 JJ |
825 | union acpi_object *o; |
826 | struct acpi_video_device_brightness *br = NULL; | |
05950094 | 827 | int result = 0; |
bd8ba205 | 828 | u32 value; |
469778c1 | 829 | |
05950094 AL |
830 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device->handle, |
831 | &obj))) { | |
469778c1 JJ |
832 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " |
833 | "LCD brightness level\n")); | |
05950094 | 834 | result = -ENODEV; |
469778c1 JJ |
835 | goto out; |
836 | } | |
837 | ||
d485ef43 | 838 | if (obj->package.count < ACPI_VIDEO_FIRST_LEVEL) { |
05950094 | 839 | result = -EINVAL; |
469778c1 | 840 | goto out; |
05950094 | 841 | } |
469778c1 JJ |
842 | |
843 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
844 | if (!br) { | |
845 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 846 | result = -ENOMEM; |
469778c1 JJ |
847 | goto out; |
848 | } | |
849 | ||
592c8095 DF |
850 | /* |
851 | * Note that we have to reserve 2 extra items (ACPI_VIDEO_FIRST_LEVEL), | |
852 | * in order to account for buggy BIOS which don't export the first two | |
853 | * special levels (see below) | |
854 | */ | |
6da2ec56 KC |
855 | br->levels = kmalloc_array(obj->package.count + ACPI_VIDEO_FIRST_LEVEL, |
856 | sizeof(*br->levels), | |
857 | GFP_KERNEL); | |
1a7c618a ZR |
858 | if (!br->levels) { |
859 | result = -ENOMEM; | |
469778c1 | 860 | goto out_free; |
1a7c618a | 861 | } |
469778c1 JJ |
862 | |
863 | for (i = 0; i < obj->package.count; i++) { | |
864 | o = (union acpi_object *)&obj->package.elements[i]; | |
865 | if (o->type != ACPI_TYPE_INTEGER) { | |
866 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
867 | continue; | |
868 | } | |
bd8ba205 HG |
869 | value = (u32) o->integer.value; |
870 | /* Skip duplicate entries */ | |
d485ef43 DF |
871 | if (count > ACPI_VIDEO_FIRST_LEVEL |
872 | && br->levels[count - 1] == value) | |
bd8ba205 HG |
873 | continue; |
874 | ||
875 | br->levels[count] = value; | |
469778c1 JJ |
876 | |
877 | if (br->levels[count] > max_level) | |
878 | max_level = br->levels[count]; | |
879 | count++; | |
880 | } | |
881 | ||
d32f6947 ZR |
882 | /* |
883 | * some buggy BIOS don't export the levels | |
884 | * when machine is on AC/Battery in _BCL package. | |
885 | * In this case, the first two elements in _BCL packages | |
886 | * are also supported brightness levels that OS should take care of. | |
887 | */ | |
d485ef43 DF |
888 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < count; i++) { |
889 | if (br->levels[i] == br->levels[ACPI_VIDEO_AC_LEVEL]) | |
d32f6947 | 890 | level_ac_battery++; |
d485ef43 | 891 | if (br->levels[i] == br->levels[ACPI_VIDEO_BATTERY_LEVEL]) |
90af2cf6 ZR |
892 | level_ac_battery++; |
893 | } | |
d32f6947 | 894 | |
d485ef43 DF |
895 | if (level_ac_battery < ACPI_VIDEO_FIRST_LEVEL) { |
896 | level_ac_battery = ACPI_VIDEO_FIRST_LEVEL - level_ac_battery; | |
d32f6947 | 897 | br->flags._BCL_no_ac_battery_levels = 1; |
d485ef43 DF |
898 | for (i = (count - 1 + level_ac_battery); |
899 | i >= ACPI_VIDEO_FIRST_LEVEL; i--) | |
d32f6947 ZR |
900 | br->levels[i] = br->levels[i - level_ac_battery]; |
901 | count += level_ac_battery; | |
d485ef43 | 902 | } else if (level_ac_battery > ACPI_VIDEO_FIRST_LEVEL) |
bf6787eb | 903 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 904 | |
d80fb99f | 905 | /* Check if the _BCL package is in a reversed order */ |
d485ef43 | 906 | if (max_level == br->levels[ACPI_VIDEO_FIRST_LEVEL]) { |
d80fb99f | 907 | br->flags._BCL_reversed = 1; |
d485ef43 DF |
908 | sort(&br->levels[ACPI_VIDEO_FIRST_LEVEL], |
909 | count - ACPI_VIDEO_FIRST_LEVEL, | |
910 | sizeof(br->levels[ACPI_VIDEO_FIRST_LEVEL]), | |
911 | acpi_video_cmp_level, NULL); | |
d80fb99f ZR |
912 | } else if (max_level != br->levels[count - 1]) |
913 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 914 | "Found unordered _BCL package")); |
469778c1 JJ |
915 | |
916 | br->count = count; | |
05950094 | 917 | *dev_br = br; |
9f9cd7ee AL |
918 | if (pmax_level) |
919 | *pmax_level = max_level; | |
05950094 AL |
920 | |
921 | out: | |
922 | kfree(obj); | |
923 | return result; | |
924 | out_free: | |
925 | kfree(br); | |
926 | goto out; | |
927 | } | |
928 | EXPORT_SYMBOL(acpi_video_get_levels); | |
929 | ||
930 | /* | |
931 | * Arg: | |
932 | * device : video output device (LCD, CRT, ..) | |
933 | * | |
934 | * Return Value: | |
935 | * Maximum brightness level | |
936 | * | |
937 | * Allocate and initialize device->brightness. | |
938 | */ | |
939 | ||
940 | static int | |
941 | acpi_video_init_brightness(struct acpi_video_device *device) | |
942 | { | |
943 | int i, max_level = 0; | |
944 | unsigned long long level, level_old; | |
945 | struct acpi_video_device_brightness *br = NULL; | |
966f58df | 946 | int result; |
05950094 | 947 | |
9f9cd7ee | 948 | result = acpi_video_get_levels(device->dev, &br, &max_level); |
05950094 AL |
949 | if (result) |
950 | return result; | |
469778c1 | 951 | device->brightness = br; |
1a7c618a | 952 | |
1a7c618a | 953 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 954 | br->curr = level = max_level; |
e047cca6 ZR |
955 | |
956 | if (!device->cap._BQC) | |
957 | goto set_level; | |
958 | ||
a89803df DB |
959 | result = acpi_video_device_lcd_get_level_current(device, |
960 | &level_old, true); | |
1a7c618a ZR |
961 | if (result) |
962 | goto out_free_levels; | |
963 | ||
a50188da | 964 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
965 | if (result) |
966 | goto out_free_levels; | |
a50188da AL |
967 | /* |
968 | * cap._BQC may get cleared due to _BQC is found to be broken | |
969 | * in acpi_video_bqc_quirk, so check again here. | |
970 | */ | |
971 | if (!device->cap._BQC) | |
972 | goto set_level; | |
e047cca6 | 973 | |
545ef368 AL |
974 | level = acpi_video_bqc_value_to_level(device, level_old); |
975 | /* | |
976 | * On some buggy laptops, _BQC returns an uninitialized | |
977 | * value when invoked for the first time, i.e. | |
978 | * level_old is invalid (no matter whether it's a level | |
979 | * or an index). Set the backlight to max_level in this case. | |
980 | */ | |
d485ef43 | 981 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < br->count; i++) |
545ef368 AL |
982 | if (level == br->levels[i]) |
983 | break; | |
984 | if (i == br->count || !level) | |
985 | level = max_level; | |
e047cca6 | 986 | |
e047cca6 | 987 | set_level: |
90c53ca4 | 988 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
989 | if (result) |
990 | goto out_free_levels; | |
1a7c618a | 991 | |
d32f6947 | 992 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
d485ef43 DF |
993 | "found %d brightness levels\n", |
994 | br->count - ACPI_VIDEO_FIRST_LEVEL)); | |
05950094 | 995 | return 0; |
469778c1 JJ |
996 | |
997 | out_free_levels: | |
998 | kfree(br->levels); | |
469778c1 | 999 | kfree(br); |
469778c1 | 1000 | device->brightness = NULL; |
1a7c618a | 1001 | return result; |
469778c1 JJ |
1002 | } |
1003 | ||
1004 | /* | |
1005 | * Arg: | |
1006 | * device : video output device (LCD, CRT, ..) | |
1007 | * | |
1008 | * Return Value: | |
21fcb34e | 1009 | * None |
1da177e4 | 1010 | * |
98fb8fe1 | 1011 | * Find out all required AML methods defined under the output |
1da177e4 LT |
1012 | * device. |
1013 | */ | |
1014 | ||
4be44fcd | 1015 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 1016 | { |
952c63e9 | 1017 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 1018 | device->cap._ADR = 1; |
952c63e9 | 1019 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 1020 | device->cap._BCL = 1; |
952c63e9 | 1021 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 1022 | device->cap._BCM = 1; |
952c63e9 | 1023 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 1024 | device->cap._BQC = 1; |
952c63e9 | 1025 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
1026 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
1027 | device->cap._BCQ = 1; | |
1028 | } | |
1029 | ||
952c63e9 | 1030 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 1031 | device->cap._DDC = 1; |
1da177e4 LT |
1032 | } |
1033 | ||
1034 | /* | |
21fcb34e FC |
1035 | * Arg: |
1036 | * device : video output device (VGA) | |
1da177e4 LT |
1037 | * |
1038 | * Return Value: | |
21fcb34e | 1039 | * None |
1da177e4 | 1040 | * |
98fb8fe1 | 1041 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
1042 | */ |
1043 | ||
4be44fcd | 1044 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1045 | { |
952c63e9 | 1046 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 1047 | video->cap._DOS = 1; |
952c63e9 | 1048 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 1049 | video->cap._DOD = 1; |
952c63e9 | 1050 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 1051 | video->cap._ROM = 1; |
952c63e9 | 1052 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 1053 | video->cap._GPD = 1; |
952c63e9 | 1054 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 1055 | video->cap._SPD = 1; |
952c63e9 | 1056 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 1057 | video->cap._VPO = 1; |
1da177e4 LT |
1058 | } |
1059 | ||
1060 | /* | |
1061 | * Check whether the video bus device has required AML method to | |
1062 | * support the desired features | |
1063 | */ | |
1064 | ||
4be44fcd | 1065 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1066 | { |
4be44fcd | 1067 | acpi_status status = -ENOENT; |
1e4cffe7 | 1068 | struct pci_dev *dev; |
1da177e4 LT |
1069 | |
1070 | if (!video) | |
d550d98d | 1071 | return -EINVAL; |
1da177e4 | 1072 | |
1e4cffe7 | 1073 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1074 | if (!dev) |
1075 | return -ENODEV; | |
1e4cffe7 | 1076 | pci_dev_put(dev); |
22c13f9d | 1077 | |
21fcb34e FC |
1078 | /* |
1079 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1080 | * to check well known required nodes. |
1081 | */ | |
1082 | ||
98fb8fe1 | 1083 | /* Does this device support video switching? */ |
3a1151e3 SB |
1084 | if (video->cap._DOS || video->cap._DOD) { |
1085 | if (!video->cap._DOS) { | |
1086 | printk(KERN_WARNING FW_BUG | |
1087 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1088 | acpi_device_bid(video->device)); | |
1089 | } | |
1da177e4 LT |
1090 | video->flags.multihead = 1; |
1091 | status = 0; | |
1092 | } | |
1093 | ||
98fb8fe1 | 1094 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1095 | if (video->cap._ROM) { |
1da177e4 LT |
1096 | video->flags.rom = 1; |
1097 | status = 0; | |
1098 | } | |
1099 | ||
98fb8fe1 | 1100 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1101 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1102 | video->flags.post = 1; |
1103 | status = 0; | |
1104 | } | |
1105 | ||
d550d98d | 1106 | return status; |
1da177e4 LT |
1107 | } |
1108 | ||
21fcb34e FC |
1109 | /* |
1110 | * -------------------------------------------------------------------------- | |
1111 | * Driver Interface | |
1112 | * -------------------------------------------------------------------------- | |
1113 | */ | |
1da177e4 LT |
1114 | |
1115 | /* device interface */ | |
915ea7e4 | 1116 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1117 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1118 | { | |
78eed028 DT |
1119 | struct acpi_video_enumerated_device *ids; |
1120 | int i; | |
1121 | ||
1122 | for (i = 0; i < video->attached_count; i++) { | |
1123 | ids = &video->attached_array[i]; | |
1124 | if ((ids->value.int_val & 0xffff) == device_id) | |
1125 | return &ids->value.attrib; | |
1126 | } | |
82cae999 | 1127 | |
82cae999 RZ |
1128 | return NULL; |
1129 | } | |
1da177e4 | 1130 | |
e92a7162 MG |
1131 | static int |
1132 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1133 | unsigned long device_id) | |
1134 | { | |
1135 | struct acpi_video_enumerated_device *ids; | |
1136 | int i; | |
1137 | ||
1138 | for (i = 0; i < video->attached_count; i++) { | |
1139 | ids = &video->attached_array[i]; | |
1140 | if ((ids->value.int_val & 0xffff) == device_id) | |
1141 | return ids->value.int_val; | |
1142 | } | |
1143 | ||
1144 | return 0; | |
1145 | } | |
1146 | ||
1da177e4 | 1147 | static int |
4be44fcd LB |
1148 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1149 | struct acpi_video_bus *video) | |
1da177e4 | 1150 | { |
27663c58 | 1151 | unsigned long long device_id; |
e92a7162 | 1152 | int status, device_type; |
4be44fcd | 1153 | struct acpi_video_device *data; |
915ea7e4 | 1154 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1155 | |
4be44fcd LB |
1156 | status = |
1157 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1158 | /* Some device omits _ADR, we skip them instead of fail */ |
1159 | if (ACPI_FAILURE(status)) | |
1160 | return 0; | |
1da177e4 | 1161 | |
91e13aa3 AL |
1162 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1163 | if (!data) | |
1164 | return -ENOMEM; | |
82cae999 | 1165 | |
91e13aa3 AL |
1166 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1167 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1168 | device->driver_data = data; | |
1169 | ||
1170 | data->device_id = device_id; | |
1171 | data->video = video; | |
1172 | data->dev = device; | |
8ab58e8e LT |
1173 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1174 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1175 | |
1176 | attribute = acpi_video_get_device_attr(video, device_id); | |
1177 | ||
e50b9be1 | 1178 | if (attribute && (attribute->device_id_scheme || device_id_scheme)) { |
91e13aa3 AL |
1179 | switch (attribute->display_type) { |
1180 | case ACPI_VIDEO_DISPLAY_CRT: | |
1181 | data->flags.crt = 1; | |
1182 | break; | |
1183 | case ACPI_VIDEO_DISPLAY_TV: | |
1184 | data->flags.tvout = 1; | |
1185 | break; | |
1186 | case ACPI_VIDEO_DISPLAY_DVI: | |
1187 | data->flags.dvi = 1; | |
1188 | break; | |
1189 | case ACPI_VIDEO_DISPLAY_LCD: | |
1190 | data->flags.lcd = 1; | |
1191 | break; | |
1192 | default: | |
1193 | data->flags.unknown = 1; | |
1194 | break; | |
1195 | } | |
915ea7e4 | 1196 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1197 | data->flags.bios = 1; |
1198 | } else { | |
1199 | /* Check for legacy IDs */ | |
1200 | device_type = acpi_video_get_device_type(video, device_id); | |
1201 | /* Ignore bits 16 and 18-20 */ | |
1202 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1203 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1204 | data->flags.crt = 1; | |
1205 | break; | |
1206 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1207 | data->flags.lcd = 1; | |
1208 | break; | |
1209 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1210 | data->flags.tvout = 1; | |
1211 | break; | |
1212 | default: | |
1213 | data->flags.unknown = 1; | |
e92a7162 | 1214 | } |
91e13aa3 | 1215 | } |
4be44fcd | 1216 | |
91e13aa3 AL |
1217 | acpi_video_device_bind(video, data); |
1218 | acpi_video_device_find_cap(data); | |
1da177e4 | 1219 | |
91e13aa3 AL |
1220 | mutex_lock(&video->device_list_lock); |
1221 | list_add_tail(&data->entry, &video->video_device_list); | |
1222 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1223 | |
91e13aa3 | 1224 | return status; |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | /* | |
1228 | * Arg: | |
21fcb34e | 1229 | * video : video bus device |
1da177e4 LT |
1230 | * |
1231 | * Return: | |
21fcb34e FC |
1232 | * none |
1233 | * | |
1234 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1235 | * bind the ids with the corresponding video devices |
1236 | * under the video bus. | |
4be44fcd | 1237 | */ |
1da177e4 | 1238 | |
4be44fcd | 1239 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1240 | { |
ff102ea9 DT |
1241 | struct acpi_video_device *dev; |
1242 | ||
bbac81f5 | 1243 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1244 | |
1245 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1246 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1247 | |
bbac81f5 | 1248 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1249 | } |
1250 | ||
1251 | /* | |
1252 | * Arg: | |
21fcb34e FC |
1253 | * video : video bus device |
1254 | * device : video output device under the video | |
1255 | * bus | |
1da177e4 LT |
1256 | * |
1257 | * Return: | |
21fcb34e FC |
1258 | * none |
1259 | * | |
1da177e4 LT |
1260 | * Bind the ids with the corresponding video devices |
1261 | * under the video bus. | |
4be44fcd | 1262 | */ |
1da177e4 LT |
1263 | |
1264 | static void | |
4be44fcd LB |
1265 | acpi_video_device_bind(struct acpi_video_bus *video, |
1266 | struct acpi_video_device *device) | |
1da177e4 | 1267 | { |
78eed028 | 1268 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1269 | int i; |
1da177e4 | 1270 | |
78eed028 DT |
1271 | for (i = 0; i < video->attached_count; i++) { |
1272 | ids = &video->attached_array[i]; | |
1273 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1274 | ids->bind_info = device; | |
1da177e4 LT |
1275 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1276 | } | |
1277 | } | |
1da177e4 LT |
1278 | } |
1279 | ||
0b8db271 AL |
1280 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1281 | { | |
1282 | struct acpi_video_bus *video = device->video; | |
1283 | int i; | |
1284 | ||
b4df4636 AL |
1285 | /* |
1286 | * If we have a broken _DOD or we have more than 8 output devices | |
1287 | * under the graphics controller node that we can't proper deal with | |
1288 | * in the operation region code currently, no need to test. | |
1289 | */ | |
1290 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1291 | return true; |
1292 | ||
1293 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1294 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1295 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1296 | return true; |
1297 | } | |
1298 | ||
1299 | return false; | |
1300 | } | |
1301 | ||
1da177e4 LT |
1302 | /* |
1303 | * Arg: | |
21fcb34e | 1304 | * video : video bus device |
1da177e4 LT |
1305 | * |
1306 | * Return: | |
21fcb34e FC |
1307 | * < 0 : error |
1308 | * | |
1da177e4 LT |
1309 | * Call _DOD to enumerate all devices attached to display adapter |
1310 | * | |
4be44fcd | 1311 | */ |
1da177e4 LT |
1312 | |
1313 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1314 | { | |
4be44fcd LB |
1315 | int status; |
1316 | int count; | |
1317 | int i; | |
78eed028 | 1318 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1319 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1320 | union acpi_object *dod = NULL; | |
1321 | union acpi_object *obj; | |
1da177e4 | 1322 | |
e34fbbac AH |
1323 | if (!video->cap._DOD) |
1324 | return AE_NOT_EXIST; | |
1325 | ||
90130268 | 1326 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1327 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1328 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1329 | return status; |
1da177e4 LT |
1330 | } |
1331 | ||
50dd0969 | 1332 | dod = buffer.pointer; |
1da177e4 | 1333 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1334 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1335 | status = -EFAULT; |
1336 | goto out; | |
1337 | } | |
1338 | ||
1339 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1340 | dod->package.count)); |
1da177e4 | 1341 | |
78eed028 DT |
1342 | active_list = kcalloc(1 + dod->package.count, |
1343 | sizeof(struct acpi_video_enumerated_device), | |
1344 | GFP_KERNEL); | |
1345 | if (!active_list) { | |
1da177e4 LT |
1346 | status = -ENOMEM; |
1347 | goto out; | |
1348 | } | |
1349 | ||
1350 | count = 0; | |
1351 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1352 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1353 | |
1354 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1355 | printk(KERN_ERR PREFIX |
1356 | "Invalid _DOD data in element %d\n", i); | |
1357 | continue; | |
1da177e4 | 1358 | } |
78eed028 DT |
1359 | |
1360 | active_list[count].value.int_val = obj->integer.value; | |
1361 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1362 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1363 | (int)obj->integer.value)); | |
1da177e4 LT |
1364 | count++; |
1365 | } | |
1da177e4 | 1366 | |
6044ec88 | 1367 | kfree(video->attached_array); |
4be44fcd | 1368 | |
78eed028 | 1369 | video->attached_array = active_list; |
1da177e4 | 1370 | video->attached_count = count; |
78eed028 | 1371 | |
915ea7e4 | 1372 | out: |
02438d87 | 1373 | kfree(buffer.pointer); |
d550d98d | 1374 | return status; |
1da177e4 LT |
1375 | } |
1376 | ||
4be44fcd LB |
1377 | static int |
1378 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1379 | u32 level_current, u32 event) | |
1da177e4 | 1380 | { |
63f0edfc | 1381 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1382 | max = max_below = 0; |
1383 | min = min_above = 255; | |
63f0edfc | 1384 | /* Find closest level to level_current */ |
d485ef43 | 1385 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) { |
63f0edfc AS |
1386 | l = device->brightness->levels[i]; |
1387 | if (abs(l - level_current) < abs(delta)) { | |
1388 | delta = l - level_current; | |
1389 | if (!delta) | |
1390 | break; | |
1391 | } | |
1392 | } | |
1393 | /* Ajust level_current to closest available level */ | |
1394 | level_current += delta; | |
d485ef43 | 1395 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) { |
f4715189 TT |
1396 | l = device->brightness->levels[i]; |
1397 | if (l < min) | |
1398 | min = l; | |
1399 | if (l > max) | |
1400 | max = l; | |
1401 | if (l < min_above && l > level_current) | |
1402 | min_above = l; | |
1403 | if (l > max_below && l < level_current) | |
1404 | max_below = l; | |
1405 | } | |
1406 | ||
1407 | switch (event) { | |
1408 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1409 | return (level_current < max) ? min_above : min; | |
1410 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1411 | return (level_current < max) ? min_above : max; | |
1412 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1413 | return (level_current > min) ? max_below : min; | |
1414 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1415 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1416 | return 0; | |
1417 | default: | |
1418 | return level_current; | |
1419 | } | |
1da177e4 LT |
1420 | } |
1421 | ||
8ab58e8e LT |
1422 | static void |
1423 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1424 | { |
8ab58e8e LT |
1425 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1426 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1427 | unsigned long long level_current, level_next; |
8ab58e8e | 1428 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1429 | int result = -EINVAL; |
1430 | ||
fbc9fe1b | 1431 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
654a182d | 1432 | if (!device->backlight) |
8ab58e8e | 1433 | return; |
28c32e99 | 1434 | |
469778c1 | 1435 | if (!device->brightness) |
c8890f90 ZR |
1436 | goto out; |
1437 | ||
1438 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1439 | &level_current, |
1440 | false); | |
c8890f90 ZR |
1441 | if (result) |
1442 | goto out; | |
1443 | ||
1da177e4 | 1444 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1445 | |
24450c7a | 1446 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1447 | |
36342742 MG |
1448 | if (!result) |
1449 | backlight_force_update(device->backlight, | |
1450 | BACKLIGHT_UPDATE_HOTKEY); | |
1451 | ||
c8890f90 ZR |
1452 | out: |
1453 | if (result) | |
1454 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1455 | } |
1456 | ||
e92a7162 MG |
1457 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1458 | void **edid) | |
1459 | { | |
1460 | struct acpi_video_bus *video; | |
1461 | struct acpi_video_device *video_device; | |
1462 | union acpi_object *buffer = NULL; | |
1463 | acpi_status status; | |
1464 | int i, length; | |
1465 | ||
1466 | if (!device || !acpi_driver_data(device)) | |
1467 | return -EINVAL; | |
1468 | ||
1469 | video = acpi_driver_data(device); | |
1470 | ||
1471 | for (i = 0; i < video->attached_count; i++) { | |
1472 | video_device = video->attached_array[i].bind_info; | |
1473 | length = 256; | |
1474 | ||
1475 | if (!video_device) | |
1476 | continue; | |
1477 | ||
82069552 ZR |
1478 | if (!video_device->cap._DDC) |
1479 | continue; | |
1480 | ||
e92a7162 MG |
1481 | if (type) { |
1482 | switch (type) { | |
1483 | case ACPI_VIDEO_DISPLAY_CRT: | |
1484 | if (!video_device->flags.crt) | |
1485 | continue; | |
1486 | break; | |
1487 | case ACPI_VIDEO_DISPLAY_TV: | |
1488 | if (!video_device->flags.tvout) | |
1489 | continue; | |
1490 | break; | |
1491 | case ACPI_VIDEO_DISPLAY_DVI: | |
1492 | if (!video_device->flags.dvi) | |
1493 | continue; | |
1494 | break; | |
1495 | case ACPI_VIDEO_DISPLAY_LCD: | |
1496 | if (!video_device->flags.lcd) | |
1497 | continue; | |
1498 | break; | |
1499 | } | |
1500 | } else if (video_device->device_id != device_id) { | |
1501 | continue; | |
1502 | } | |
1503 | ||
1504 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1505 | ||
1506 | if (ACPI_FAILURE(status) || !buffer || | |
1507 | buffer->type != ACPI_TYPE_BUFFER) { | |
1508 | length = 128; | |
1509 | status = acpi_video_device_EDID(video_device, &buffer, | |
1510 | length); | |
1511 | if (ACPI_FAILURE(status) || !buffer || | |
1512 | buffer->type != ACPI_TYPE_BUFFER) { | |
1513 | continue; | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | *edid = buffer->buffer.pointer; | |
1518 | return length; | |
1519 | } | |
1520 | ||
1521 | return -ENODEV; | |
1522 | } | |
1523 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1524 | ||
1da177e4 | 1525 | static int |
4be44fcd LB |
1526 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1527 | struct acpi_device *device) | |
1da177e4 | 1528 | { |
fba4e087 | 1529 | int status = 0; |
ff102ea9 | 1530 | struct acpi_device *dev; |
1da177e4 | 1531 | |
fba4e087 IM |
1532 | /* |
1533 | * There are systems where video module known to work fine regardless | |
1534 | * of broken _DOD and ignoring returned value here doesn't cause | |
1535 | * any issues later. | |
1536 | */ | |
1537 | acpi_video_device_enumerate(video); | |
1da177e4 | 1538 | |
ff102ea9 | 1539 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1540 | |
1541 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1542 | if (status) { |
91e13aa3 AL |
1543 | dev_err(&dev->dev, "Can't attach device\n"); |
1544 | break; | |
1da177e4 | 1545 | } |
b4df4636 | 1546 | video->child_count++; |
1da177e4 | 1547 | } |
d550d98d | 1548 | return status; |
1da177e4 LT |
1549 | } |
1550 | ||
1da177e4 LT |
1551 | /* acpi_video interface */ |
1552 | ||
efaa14c7 AL |
1553 | /* |
1554 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1555 | * preform any automatic brightness change on receiving a notification. | |
1556 | */ | |
4be44fcd | 1557 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1558 | { |
efaa14c7 | 1559 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1560 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1561 | } |
1562 | ||
4be44fcd | 1563 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1564 | { |
efaa14c7 | 1565 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1566 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1567 | } |
1568 | ||
7015558f | 1569 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1570 | { |
7015558f | 1571 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1572 | struct input_dev *input; |
17c452f9 | 1573 | int keycode = 0; |
e9dab196 | 1574 | |
67b662e1 | 1575 | if (!video || !video->input) |
d550d98d | 1576 | return; |
1da177e4 | 1577 | |
e9dab196 | 1578 | input = video->input; |
1da177e4 LT |
1579 | |
1580 | switch (event) { | |
98fb8fe1 | 1581 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1582 | * most likely via hotkey. */ |
8a37c65d | 1583 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1584 | break; |
1585 | ||
98fb8fe1 | 1586 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1587 | * connector. */ |
1588 | acpi_video_device_enumerate(video); | |
1589 | acpi_video_device_rebind(video); | |
e9dab196 | 1590 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1591 | break; |
1592 | ||
4be44fcd | 1593 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1594 | keycode = KEY_SWITCHVIDEOMODE; |
1595 | break; | |
4be44fcd | 1596 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1597 | keycode = KEY_VIDEO_NEXT; |
1598 | break; | |
4be44fcd | 1599 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1600 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1601 | break; |
1602 | ||
1603 | default: | |
1604 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1605 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1606 | break; |
1607 | } | |
1608 | ||
8a37c65d LT |
1609 | if (acpi_notifier_call_chain(device, event, 0)) |
1610 | /* Something vetoed the keypress. */ | |
1611 | keycode = 0; | |
17c452f9 | 1612 | |
05bc59a0 | 1613 | if (keycode && (report_key_events & REPORT_OUTPUT_KEY_EVENTS)) { |
17c452f9 MG |
1614 | input_report_key(input, keycode, 1); |
1615 | input_sync(input); | |
1616 | input_report_key(input, keycode, 0); | |
1617 | input_sync(input); | |
1618 | } | |
e9dab196 | 1619 | |
d550d98d | 1620 | return; |
1da177e4 LT |
1621 | } |
1622 | ||
8ab58e8e LT |
1623 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1624 | u32 event) | |
1625 | { | |
1626 | if (!brightness_switch_enabled) | |
1627 | return; | |
1628 | ||
1629 | video_device->switch_brightness_event = event; | |
1630 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1631 | } | |
1632 | ||
4be44fcd | 1633 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1634 | { |
50dd0969 | 1635 | struct acpi_video_device *video_device = data; |
4be44fcd | 1636 | struct acpi_device *device = NULL; |
e9dab196 LY |
1637 | struct acpi_video_bus *bus; |
1638 | struct input_dev *input; | |
17c452f9 | 1639 | int keycode = 0; |
1da177e4 | 1640 | |
1da177e4 | 1641 | if (!video_device) |
d550d98d | 1642 | return; |
1da177e4 | 1643 | |
e6afa0de | 1644 | device = video_device->dev; |
e9dab196 LY |
1645 | bus = video_device->video; |
1646 | input = bus->input; | |
1da177e4 | 1647 | |
4f7f9645 HG |
1648 | if (hw_changes_brightness > 0) { |
1649 | if (video_device->backlight) | |
1650 | backlight_force_update(video_device->backlight, | |
1651 | BACKLIGHT_UPDATE_HOTKEY); | |
1652 | acpi_notifier_call_chain(device, event, 0); | |
1653 | return; | |
1654 | } | |
1655 | ||
1da177e4 | 1656 | switch (event) { |
4be44fcd | 1657 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1658 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1659 | keycode = KEY_BRIGHTNESS_CYCLE; |
1660 | break; | |
4be44fcd | 1661 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1662 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1663 | keycode = KEY_BRIGHTNESSUP; |
1664 | break; | |
4be44fcd | 1665 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1666 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1667 | keycode = KEY_BRIGHTNESSDOWN; |
1668 | break; | |
70f23fd6 | 1669 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1670 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1671 | keycode = KEY_BRIGHTNESS_ZERO; |
1672 | break; | |
4be44fcd | 1673 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1674 | brightness_switch_event(video_device, event); |
e9dab196 | 1675 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1676 | break; |
1677 | default: | |
1678 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1679 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1680 | break; |
1681 | } | |
e9dab196 | 1682 | |
7761f638 | 1683 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 | 1684 | |
05bc59a0 | 1685 | if (keycode && (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS)) { |
17c452f9 MG |
1686 | input_report_key(input, keycode, 1); |
1687 | input_sync(input); | |
1688 | input_report_key(input, keycode, 0); | |
1689 | input_sync(input); | |
1690 | } | |
e9dab196 | 1691 | |
d550d98d | 1692 | return; |
1da177e4 LT |
1693 | } |
1694 | ||
ac7729da RW |
1695 | static int acpi_video_resume(struct notifier_block *nb, |
1696 | unsigned long val, void *ign) | |
863c1490 MG |
1697 | { |
1698 | struct acpi_video_bus *video; | |
1699 | struct acpi_video_device *video_device; | |
1700 | int i; | |
1701 | ||
ac7729da RW |
1702 | switch (val) { |
1703 | case PM_HIBERNATION_PREPARE: | |
1704 | case PM_SUSPEND_PREPARE: | |
1705 | case PM_RESTORE_PREPARE: | |
1706 | return NOTIFY_DONE; | |
1707 | } | |
863c1490 | 1708 | |
ac7729da RW |
1709 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1710 | ||
1711 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1712 | |
1713 | for (i = 0; i < video->attached_count; i++) { | |
1714 | video_device = video->attached_array[i].bind_info; | |
654a182d HG |
1715 | if (video_device && video_device->brightness) |
1716 | acpi_video_device_lcd_set_level(video_device, | |
1717 | video_device->brightness->curr); | |
863c1490 | 1718 | } |
ac7729da RW |
1719 | |
1720 | return NOTIFY_OK; | |
863c1490 MG |
1721 | } |
1722 | ||
c504f8cb ZR |
1723 | static acpi_status |
1724 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1725 | void **return_value) | |
1726 | { | |
1727 | struct acpi_device *device = context; | |
1728 | struct acpi_device *sibling; | |
1729 | int result; | |
1730 | ||
1731 | if (handle == device->handle) | |
1732 | return AE_CTRL_TERMINATE; | |
1733 | ||
1734 | result = acpi_bus_get_device(handle, &sibling); | |
1735 | if (result) | |
1736 | return AE_OK; | |
1737 | ||
1738 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1739 | return AE_ALREADY_EXISTS; | |
1740 | ||
1741 | return AE_OK; | |
1742 | } | |
1743 | ||
67b662e1 AL |
1744 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1745 | { | |
99678ed7 HG |
1746 | struct backlight_properties props; |
1747 | struct pci_dev *pdev; | |
1748 | acpi_handle acpi_parent; | |
1749 | struct device *parent = NULL; | |
1750 | int result; | |
1751 | static int count; | |
1752 | char *name; | |
67b662e1 | 1753 | |
99678ed7 HG |
1754 | result = acpi_video_init_brightness(device); |
1755 | if (result) | |
1756 | return; | |
654a182d HG |
1757 | |
1758 | if (disable_backlight_sysfs_if > 0) | |
1759 | return; | |
1760 | ||
99678ed7 HG |
1761 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
1762 | if (!name) | |
1763 | return; | |
1764 | count++; | |
67b662e1 | 1765 | |
99678ed7 | 1766 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1767 | |
99678ed7 HG |
1768 | pdev = acpi_get_pci_dev(acpi_parent); |
1769 | if (pdev) { | |
1770 | parent = &pdev->dev; | |
1771 | pci_dev_put(pdev); | |
1772 | } | |
67b662e1 | 1773 | |
99678ed7 HG |
1774 | memset(&props, 0, sizeof(struct backlight_properties)); |
1775 | props.type = BACKLIGHT_FIRMWARE; | |
d485ef43 DF |
1776 | props.max_brightness = |
1777 | device->brightness->count - ACPI_VIDEO_FIRST_LEVEL - 1; | |
99678ed7 HG |
1778 | device->backlight = backlight_device_register(name, |
1779 | parent, | |
1780 | device, | |
1781 | &acpi_backlight_ops, | |
1782 | &props); | |
1783 | kfree(name); | |
654a182d HG |
1784 | if (IS_ERR(device->backlight)) { |
1785 | device->backlight = NULL; | |
99678ed7 | 1786 | return; |
654a182d | 1787 | } |
67b662e1 | 1788 | |
99678ed7 HG |
1789 | /* |
1790 | * Save current brightness level in case we have to restore it | |
1791 | * before acpi_video_device_lcd_set_level() is called next time. | |
1792 | */ | |
1793 | device->backlight->props.brightness = | |
1794 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1795 | |
99678ed7 HG |
1796 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1797 | device->dev, &video_cooling_ops); | |
1798 | if (IS_ERR(device->cooling_dev)) { | |
1799 | /* | |
1800 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1801 | * Also, why the hell we are returning early and not attempt to | |
1802 | * register video output if cooling device registration failed? | |
1803 | * -- dtor | |
1804 | */ | |
1805 | device->cooling_dev = NULL; | |
1806 | return; | |
67b662e1 | 1807 | } |
99678ed7 HG |
1808 | |
1809 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1810 | device->cooling_dev->id); | |
1811 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1812 | &device->cooling_dev->device.kobj, | |
1813 | "thermal_cooling"); | |
1814 | if (result) | |
1815 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1816 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1817 | &device->dev->dev.kobj, "device"); | |
1818 | if (result) | |
1819 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1820 | } |
1821 | ||
dce4ec2e AL |
1822 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1823 | { | |
1824 | struct acpi_video_device *dev; | |
1825 | union acpi_object *levels; | |
1826 | ||
1827 | mutex_lock(&video->device_list_lock); | |
1828 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
9f9cd7ee | 1829 | if (!acpi_video_device_lcd_query_levels(dev->dev->handle, &levels)) |
dce4ec2e AL |
1830 | kfree(levels); |
1831 | } | |
1832 | mutex_unlock(&video->device_list_lock); | |
1833 | } | |
1834 | ||
e50b9be1 AL |
1835 | static bool acpi_video_should_register_backlight(struct acpi_video_device *dev) |
1836 | { | |
1837 | /* | |
1838 | * Do not create backlight device for video output | |
1839 | * device that is not in the enumerated list. | |
1840 | */ | |
1841 | if (!acpi_video_device_in_dod(dev)) { | |
1842 | dev_dbg(&dev->dev->dev, "not in _DOD list, ignore\n"); | |
1843 | return false; | |
1844 | } | |
1845 | ||
1846 | if (only_lcd) | |
1847 | return dev->flags.lcd; | |
1848 | return true; | |
1849 | } | |
1850 | ||
67b662e1 AL |
1851 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1852 | { | |
1853 | struct acpi_video_device *dev; | |
1854 | ||
53a92ba7 HG |
1855 | if (video->backlight_registered) |
1856 | return 0; | |
1857 | ||
dce4ec2e AL |
1858 | acpi_video_run_bcl_for_osi(video); |
1859 | ||
3bd6bce3 | 1860 | if (acpi_video_get_backlight_type() != acpi_backlight_video) |
99678ed7 HG |
1861 | return 0; |
1862 | ||
67b662e1 | 1863 | mutex_lock(&video->device_list_lock); |
e50b9be1 AL |
1864 | list_for_each_entry(dev, &video->video_device_list, entry) { |
1865 | if (acpi_video_should_register_backlight(dev)) | |
1866 | acpi_video_dev_register_backlight(dev); | |
1867 | } | |
67b662e1 AL |
1868 | mutex_unlock(&video->device_list_lock); |
1869 | ||
99678ed7 HG |
1870 | video->backlight_registered = true; |
1871 | ||
67b662e1 AL |
1872 | video->pm_nb.notifier_call = acpi_video_resume; |
1873 | video->pm_nb.priority = 0; | |
1874 | return register_pm_notifier(&video->pm_nb); | |
1875 | } | |
1876 | ||
1877 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1878 | { | |
1879 | if (device->backlight) { | |
1880 | backlight_device_unregister(device->backlight); | |
1881 | device->backlight = NULL; | |
1882 | } | |
1883 | if (device->brightness) { | |
1884 | kfree(device->brightness->levels); | |
1885 | kfree(device->brightness); | |
1886 | device->brightness = NULL; | |
1887 | } | |
1888 | if (device->cooling_dev) { | |
1889 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1890 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1891 | thermal_cooling_device_unregister(device->cooling_dev); | |
1892 | device->cooling_dev = NULL; | |
1893 | } | |
1894 | } | |
1895 | ||
1896 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1897 | { | |
1898 | struct acpi_video_device *dev; | |
99678ed7 HG |
1899 | int error; |
1900 | ||
1901 | if (!video->backlight_registered) | |
1902 | return 0; | |
1903 | ||
1904 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1905 | |
1906 | mutex_lock(&video->device_list_lock); | |
1907 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1908 | acpi_video_dev_unregister_backlight(dev); | |
1909 | mutex_unlock(&video->device_list_lock); | |
1910 | ||
99678ed7 HG |
1911 | video->backlight_registered = false; |
1912 | ||
67b662e1 AL |
1913 | return error; |
1914 | } | |
1915 | ||
1916 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1917 | { | |
1918 | acpi_status status; | |
1919 | struct acpi_device *adev = device->dev; | |
1920 | ||
1921 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1922 | acpi_video_device_notify, device); | |
1923 | if (ACPI_FAILURE(status)) | |
1924 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1925 | else | |
1926 | device->flags.notify = 1; | |
1927 | } | |
1928 | ||
1929 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1930 | { | |
1931 | struct input_dev *input; | |
1932 | struct acpi_video_device *dev; | |
1933 | int error; | |
1934 | ||
1935 | video->input = input = input_allocate_device(); | |
1936 | if (!input) { | |
1937 | error = -ENOMEM; | |
1938 | goto out; | |
1939 | } | |
1940 | ||
1941 | error = acpi_video_bus_start_devices(video); | |
1942 | if (error) | |
1943 | goto err_free_input; | |
1944 | ||
1945 | snprintf(video->phys, sizeof(video->phys), | |
1946 | "%s/video/input0", acpi_device_hid(video->device)); | |
1947 | ||
1948 | input->name = acpi_device_name(video->device); | |
1949 | input->phys = video->phys; | |
1950 | input->id.bustype = BUS_HOST; | |
1951 | input->id.product = 0x06; | |
1952 | input->dev.parent = &video->device->dev; | |
1953 | input->evbit[0] = BIT(EV_KEY); | |
1954 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1955 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1956 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1957 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1958 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1959 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1960 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1961 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1962 | ||
1963 | error = input_register_device(input); | |
1964 | if (error) | |
1965 | goto err_stop_dev; | |
1966 | ||
1967 | mutex_lock(&video->device_list_lock); | |
1968 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1969 | acpi_video_dev_add_notify_handler(dev); | |
1970 | mutex_unlock(&video->device_list_lock); | |
1971 | ||
1972 | return 0; | |
1973 | ||
1974 | err_stop_dev: | |
1975 | acpi_video_bus_stop_devices(video); | |
1976 | err_free_input: | |
1977 | input_free_device(input); | |
1978 | video->input = NULL; | |
1979 | out: | |
1980 | return error; | |
1981 | } | |
1982 | ||
1983 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1984 | { | |
1985 | if (dev->flags.notify) { | |
1986 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1987 | acpi_video_device_notify); | |
1988 | dev->flags.notify = 0; | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1993 | { | |
1994 | struct acpi_video_device *dev; | |
1995 | ||
1996 | mutex_lock(&video->device_list_lock); | |
1997 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1998 | acpi_video_dev_remove_notify_handler(dev); | |
1999 | mutex_unlock(&video->device_list_lock); | |
2000 | ||
2001 | acpi_video_bus_stop_devices(video); | |
2002 | input_unregister_device(video->input); | |
2003 | video->input = NULL; | |
2004 | } | |
2005 | ||
2006 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
2007 | { | |
2008 | struct acpi_video_device *dev, *next; | |
2009 | ||
2010 | mutex_lock(&video->device_list_lock); | |
2011 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
2012 | list_del(&dev->entry); | |
2013 | kfree(dev); | |
2014 | } | |
2015 | mutex_unlock(&video->device_list_lock); | |
2016 | ||
2017 | return 0; | |
2018 | } | |
2019 | ||
ac7729da RW |
2020 | static int instance; |
2021 | ||
4be44fcd | 2022 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 2023 | { |
f51e8391 | 2024 | struct acpi_video_bus *video; |
f51e8391 | 2025 | int error; |
c504f8cb ZR |
2026 | acpi_status status; |
2027 | ||
2028 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
2029 | device->parent->handle, 1, | |
2030 | acpi_video_bus_match, NULL, | |
2031 | device, NULL); | |
2032 | if (status == AE_ALREADY_EXISTS) { | |
2033 | printk(KERN_WARNING FW_BUG | |
2034 | "Duplicate ACPI video bus devices for the" | |
2035 | " same VGA controller, please try module " | |
2036 | "parameter \"video.allow_duplicates=1\"" | |
2037 | "if the current driver doesn't work.\n"); | |
2038 | if (!allow_duplicates) | |
2039 | return -ENODEV; | |
2040 | } | |
1da177e4 | 2041 | |
36bcbec7 | 2042 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 2043 | if (!video) |
d550d98d | 2044 | return -ENOMEM; |
1da177e4 | 2045 | |
e6d9da1d ZR |
2046 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
2047 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
2048 | if (instance) | |
2049 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 2050 | instance++; |
e6d9da1d | 2051 | } |
f3b39f13 ZY |
2052 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
2053 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
2054 | if (instance) | |
2055 | device->pnp.bus_id[3] = '0' + instance; | |
2056 | instance++; | |
2057 | } | |
e6d9da1d | 2058 | |
e6afa0de | 2059 | video->device = device; |
1da177e4 LT |
2060 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
2061 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 2062 | device->driver_data = video; |
1da177e4 LT |
2063 | |
2064 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
2065 | error = acpi_video_bus_check(video); |
2066 | if (error) | |
2067 | goto err_free_video; | |
1da177e4 | 2068 | |
bbac81f5 | 2069 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
2070 | INIT_LIST_HEAD(&video->video_device_list); |
2071 | ||
ea9f8856 IM |
2072 | error = acpi_video_bus_get_devices(video, device); |
2073 | if (error) | |
91e13aa3 | 2074 | goto err_put_video; |
1da177e4 | 2075 | |
1da177e4 | 2076 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
2077 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
2078 | video->flags.multihead ? "yes" : "no", | |
2079 | video->flags.rom ? "yes" : "no", | |
2080 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
2081 | mutex_lock(&video_list_lock); |
2082 | list_add_tail(&video->entry, &video_bus_head); | |
2083 | mutex_unlock(&video_list_lock); | |
1da177e4 | 2084 | |
67b662e1 AL |
2085 | acpi_video_bus_register_backlight(video); |
2086 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 2087 | |
f51e8391 DT |
2088 | return 0; |
2089 | ||
67b662e1 | 2090 | err_put_video: |
f51e8391 DT |
2091 | acpi_video_bus_put_devices(video); |
2092 | kfree(video->attached_array); | |
67b662e1 | 2093 | err_free_video: |
f51e8391 | 2094 | kfree(video); |
db89b4f0 | 2095 | device->driver_data = NULL; |
1da177e4 | 2096 | |
f51e8391 | 2097 | return error; |
1da177e4 LT |
2098 | } |
2099 | ||
51fac838 | 2100 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 2101 | { |
4be44fcd | 2102 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2103 | |
1da177e4 LT |
2104 | |
2105 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2106 | return -EINVAL; |
1da177e4 | 2107 | |
50dd0969 | 2108 | video = acpi_driver_data(device); |
1da177e4 | 2109 | |
67b662e1 AL |
2110 | acpi_video_bus_remove_notify_handler(video); |
2111 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 2112 | acpi_video_bus_put_devices(video); |
1da177e4 | 2113 | |
67b662e1 AL |
2114 | mutex_lock(&video_list_lock); |
2115 | list_del(&video->entry); | |
2116 | mutex_unlock(&video_list_lock); | |
2117 | ||
6044ec88 | 2118 | kfree(video->attached_array); |
1da177e4 LT |
2119 | kfree(video); |
2120 | ||
d550d98d | 2121 | return 0; |
1da177e4 LT |
2122 | } |
2123 | ||
c6996bdd AC |
2124 | static int __init is_i740(struct pci_dev *dev) |
2125 | { | |
2126 | if (dev->device == 0x00D1) | |
2127 | return 1; | |
2128 | if (dev->device == 0x7000) | |
2129 | return 1; | |
2130 | return 0; | |
2131 | } | |
2132 | ||
74a365b3 MG |
2133 | static int __init intel_opregion_present(void) |
2134 | { | |
c6996bdd | 2135 | int opregion = 0; |
74a365b3 MG |
2136 | struct pci_dev *dev = NULL; |
2137 | u32 address; | |
2138 | ||
2139 | for_each_pci_dev(dev) { | |
2140 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2141 | continue; | |
2142 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2143 | continue; | |
c6996bdd AC |
2144 | /* We don't want to poke around undefined i740 registers */ |
2145 | if (is_i740(dev)) | |
2146 | continue; | |
74a365b3 MG |
2147 | pci_read_config_dword(dev, 0xfc, &address); |
2148 | if (!address) | |
2149 | continue; | |
c6996bdd | 2150 | opregion = 1; |
74a365b3 | 2151 | } |
c6996bdd | 2152 | return opregion; |
74a365b3 MG |
2153 | } |
2154 | ||
cecf3e3e | 2155 | /* Check if the chassis-type indicates there is no builtin LCD panel */ |
53fa1f6e HG |
2156 | static bool dmi_is_desktop(void) |
2157 | { | |
2158 | const char *chassis_type; | |
cecf3e3e | 2159 | unsigned long type; |
53fa1f6e HG |
2160 | |
2161 | chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE); | |
2162 | if (!chassis_type) | |
2163 | return false; | |
2164 | ||
cecf3e3e HG |
2165 | if (kstrtoul(chassis_type, 10, &type) != 0) |
2166 | return false; | |
2167 | ||
2168 | switch (type) { | |
2169 | case 0x03: /* Desktop */ | |
2170 | case 0x04: /* Low Profile Desktop */ | |
2171 | case 0x05: /* Pizza Box */ | |
2172 | case 0x06: /* Mini Tower */ | |
2173 | case 0x07: /* Tower */ | |
d693c008 | 2174 | case 0x10: /* Lunch Box */ |
cecf3e3e | 2175 | case 0x11: /* Main Server Chassis */ |
53fa1f6e | 2176 | return true; |
cecf3e3e | 2177 | } |
53fa1f6e HG |
2178 | |
2179 | return false; | |
2180 | } | |
2181 | ||
8e5c2b77 | 2182 | int acpi_video_register(void) |
1da177e4 | 2183 | { |
2a8b18e9 | 2184 | int ret = 0; |
28d63403 | 2185 | |
970530cd HG |
2186 | mutex_lock(®ister_count_mutex); |
2187 | if (register_count) { | |
86e437f0 | 2188 | /* |
8e5c2b77 | 2189 | * if the function of acpi_video_register is already called, |
cbf6d033 | 2190 | * don't register the acpi_video_bus again and return no error. |
86e437f0 | 2191 | */ |
2a8b18e9 | 2192 | goto leave; |
86e437f0 | 2193 | } |
1da177e4 | 2194 | |
5928c281 HG |
2195 | /* |
2196 | * We're seeing a lot of bogus backlight interfaces on newer machines | |
2197 | * without a LCD such as desktops, servers and HDMI sticks. Checking | |
2198 | * the lcd flag fixes this, so enable this on any machines which are | |
2199 | * win8 ready (where we also prefer the native backlight driver, so | |
2200 | * normally the acpi_video code should not register there anyways). | |
2201 | */ | |
53fa1f6e HG |
2202 | if (only_lcd == -1) { |
2203 | if (dmi_is_desktop() && acpi_osi_is_win8()) | |
2204 | only_lcd = true; | |
2205 | else | |
2206 | only_lcd = false; | |
2207 | } | |
5928c281 | 2208 | |
7ee33baa HG |
2209 | dmi_check_system(video_dmi_table); |
2210 | ||
28d63403 CW |
2211 | ret = acpi_bus_register_driver(&acpi_video_bus); |
2212 | if (ret) | |
2a8b18e9 | 2213 | goto leave; |
1da177e4 | 2214 | |
86e437f0 ZY |
2215 | /* |
2216 | * When the acpi_video_bus is loaded successfully, increase | |
2217 | * the counter reference. | |
2218 | */ | |
970530cd | 2219 | register_count = 1; |
86e437f0 | 2220 | |
2a8b18e9 | 2221 | leave: |
970530cd | 2222 | mutex_unlock(®ister_count_mutex); |
2a8b18e9 | 2223 | return ret; |
1da177e4 | 2224 | } |
8e5c2b77 | 2225 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2226 | |
86e437f0 ZY |
2227 | void acpi_video_unregister(void) |
2228 | { | |
970530cd HG |
2229 | mutex_lock(®ister_count_mutex); |
2230 | if (register_count) { | |
2a8b18e9 | 2231 | acpi_bus_unregister_driver(&acpi_video_bus); |
970530cd | 2232 | register_count = 0; |
86e437f0 | 2233 | } |
970530cd | 2234 | mutex_unlock(®ister_count_mutex); |
86e437f0 ZY |
2235 | } |
2236 | EXPORT_SYMBOL(acpi_video_unregister); | |
2237 | ||
1b7f37e1 HG |
2238 | void acpi_video_unregister_backlight(void) |
2239 | { | |
2240 | struct acpi_video_bus *video; | |
2241 | ||
970530cd HG |
2242 | mutex_lock(®ister_count_mutex); |
2243 | if (register_count) { | |
2a8b18e9 HG |
2244 | mutex_lock(&video_list_lock); |
2245 | list_for_each_entry(video, &video_bus_head, entry) | |
2246 | acpi_video_bus_unregister_backlight(video); | |
2247 | mutex_unlock(&video_list_lock); | |
2248 | } | |
970530cd | 2249 | mutex_unlock(®ister_count_mutex); |
1b7f37e1 | 2250 | } |
1b7f37e1 | 2251 | |
90b066b1 HG |
2252 | bool acpi_video_handles_brightness_key_presses(void) |
2253 | { | |
2254 | bool have_video_busses; | |
2255 | ||
2256 | mutex_lock(&video_list_lock); | |
2257 | have_video_busses = !list_empty(&video_bus_head); | |
2258 | mutex_unlock(&video_list_lock); | |
2259 | ||
05bc59a0 HG |
2260 | return have_video_busses && |
2261 | (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS); | |
90b066b1 HG |
2262 | } |
2263 | EXPORT_SYMBOL(acpi_video_handles_brightness_key_presses); | |
2264 | ||
74a365b3 MG |
2265 | /* |
2266 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2267 | * the video opregion code to be run first in order to initialise | |
2268 | * state before any ACPI video calls are made. To handle this we defer | |
2269 | * registration of the video class until the opregion code has run. | |
2270 | */ | |
2271 | ||
2272 | static int __init acpi_video_init(void) | |
2273 | { | |
6e17cb12 CW |
2274 | /* |
2275 | * Let the module load even if ACPI is disabled (e.g. due to | |
2276 | * a broken BIOS) so that i915.ko can still be loaded on such | |
2277 | * old systems without an AcpiOpRegion. | |
2278 | * | |
2279 | * acpi_video_register() will report -ENODEV later as well due | |
2280 | * to acpi_disabled when i915.ko tries to register itself afterwards. | |
2281 | */ | |
2282 | if (acpi_disabled) | |
2283 | return 0; | |
2284 | ||
74a365b3 MG |
2285 | if (intel_opregion_present()) |
2286 | return 0; | |
2287 | ||
2288 | return acpi_video_register(); | |
2289 | } | |
1da177e4 | 2290 | |
86e437f0 | 2291 | static void __exit acpi_video_exit(void) |
1da177e4 | 2292 | { |
93a291df | 2293 | acpi_video_detect_exit(); |
86e437f0 | 2294 | acpi_video_unregister(); |
1da177e4 | 2295 | |
d550d98d | 2296 | return; |
1da177e4 LT |
2297 | } |
2298 | ||
2299 | module_init(acpi_video_init); | |
2300 | module_exit(acpi_video_exit); |