Commit | Line | Data |
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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 | ||
592c8095 DF |
63 | /* |
64 | * Whether the struct acpi_video_device_attrib::device_id_scheme bit should be | |
65 | * assumed even if not actually set. | |
66 | */ | |
e50b9be1 AL |
67 | static bool device_id_scheme = false; |
68 | module_param(device_id_scheme, bool, 0444); | |
69 | ||
5928c281 HG |
70 | static int only_lcd = -1; |
71 | module_param(only_lcd, int, 0444); | |
e50b9be1 | 72 | |
970530cd HG |
73 | static int register_count; |
74 | static DEFINE_MUTEX(register_count_mutex); | |
14e93553 HG |
75 | static DEFINE_MUTEX(video_list_lock); |
76 | static LIST_HEAD(video_bus_head); | |
4be44fcd | 77 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 78 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 79 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
93a291df | 80 | void acpi_video_detect_exit(void); |
1da177e4 | 81 | |
d485ef43 DF |
82 | /* |
83 | * Indices in the _BCL method response: the first two items are special, | |
84 | * the rest are all supported levels. | |
85 | * | |
86 | * See page 575 of the ACPI spec 3.0 | |
87 | */ | |
88 | enum acpi_video_level_idx { | |
89 | ACPI_VIDEO_AC_LEVEL, /* level when machine has full power */ | |
90 | ACPI_VIDEO_BATTERY_LEVEL, /* level when machine is on batteries */ | |
91 | ACPI_VIDEO_FIRST_LEVEL, /* actual supported levels begin here */ | |
92 | }; | |
93 | ||
1ba90e3a TR |
94 | static const struct acpi_device_id video_device_ids[] = { |
95 | {ACPI_VIDEO_HID, 0}, | |
96 | {"", 0}, | |
97 | }; | |
98 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
99 | ||
1da177e4 | 100 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 101 | .name = "video", |
1da177e4 | 102 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 103 | .ids = video_device_ids, |
1da177e4 LT |
104 | .ops = { |
105 | .add = acpi_video_bus_add, | |
106 | .remove = acpi_video_bus_remove, | |
7015558f | 107 | .notify = acpi_video_bus_notify, |
4be44fcd | 108 | }, |
1da177e4 LT |
109 | }; |
110 | ||
111 | struct acpi_video_bus_flags { | |
4be44fcd LB |
112 | u8 multihead:1; /* can switch video heads */ |
113 | u8 rom:1; /* can retrieve a video rom */ | |
114 | u8 post:1; /* can configure the head to */ | |
115 | u8 reserved:5; | |
1da177e4 LT |
116 | }; |
117 | ||
118 | struct acpi_video_bus_cap { | |
21fcb34e FC |
119 | u8 _DOS:1; /* Enable/Disable output switching */ |
120 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
121 | u8 _ROM:1; /* Get ROM Data */ | |
122 | u8 _GPD:1; /* Get POST Device */ | |
123 | u8 _SPD:1; /* Set POST Device */ | |
124 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 125 | u8 reserved:2; |
1da177e4 LT |
126 | }; |
127 | ||
4be44fcd LB |
128 | struct acpi_video_device_attrib { |
129 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
130 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
131 | u32 display_type:4; /* Describe the specific type in use */ | |
132 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
133 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
134 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 135 | the VGA device. */ |
21fcb34e FC |
136 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
137 | u32 reserved:10; /* Must be 0 */ | |
592c8095 DF |
138 | |
139 | /* | |
140 | * The device ID might not actually follow the scheme described by this | |
141 | * struct acpi_video_device_attrib. If it does, then this bit | |
142 | * device_id_scheme is set; otherwise, other fields should be ignored. | |
143 | * | |
144 | * (but also see the global flag device_id_scheme) | |
145 | */ | |
146 | u32 device_id_scheme:1; | |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct acpi_video_enumerated_device { | |
150 | union { | |
151 | u32 int_val; | |
4be44fcd | 152 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
153 | } value; |
154 | struct acpi_video_device *bind_info; | |
155 | }; | |
156 | ||
157 | struct acpi_video_bus { | |
e6afa0de | 158 | struct acpi_device *device; |
99678ed7 | 159 | bool backlight_registered; |
4be44fcd | 160 | u8 dos_setting; |
1da177e4 | 161 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd | 162 | u8 attached_count; |
b4df4636 | 163 | u8 child_count; |
4be44fcd | 164 | struct acpi_video_bus_cap cap; |
1da177e4 | 165 | struct acpi_video_bus_flags flags; |
4be44fcd | 166 | struct list_head video_device_list; |
bbac81f5 | 167 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 168 | struct list_head entry; |
e9dab196 LY |
169 | struct input_dev *input; |
170 | char phys[32]; /* for input device */ | |
ac7729da | 171 | struct notifier_block pm_nb; |
1da177e4 LT |
172 | }; |
173 | ||
174 | struct acpi_video_device_flags { | |
4be44fcd LB |
175 | u8 crt:1; |
176 | u8 lcd:1; | |
177 | u8 tvout:1; | |
82cae999 | 178 | u8 dvi:1; |
4be44fcd LB |
179 | u8 bios:1; |
180 | u8 unknown:1; | |
91e13aa3 AL |
181 | u8 notify:1; |
182 | u8 reserved:1; | |
1da177e4 LT |
183 | }; |
184 | ||
185 | struct acpi_video_device_cap { | |
21fcb34e FC |
186 | u8 _ADR:1; /* Return the unique ID */ |
187 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
188 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 189 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 190 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 191 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
192 | }; |
193 | ||
1da177e4 | 194 | struct acpi_video_device { |
4be44fcd LB |
195 | unsigned long device_id; |
196 | struct acpi_video_device_flags flags; | |
197 | struct acpi_video_device_cap cap; | |
198 | struct list_head entry; | |
8ab58e8e LT |
199 | struct delayed_work switch_brightness_work; |
200 | int switch_brightness_event; | |
4be44fcd LB |
201 | struct acpi_video_bus *video; |
202 | struct acpi_device *dev; | |
1da177e4 | 203 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 204 | struct backlight_device *backlight; |
4a703a8f | 205 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
206 | }; |
207 | ||
4be44fcd LB |
208 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
209 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
210 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
211 | struct acpi_video_device *device); | |
1da177e4 | 212 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
213 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
214 | int level); | |
215 | static int acpi_video_device_lcd_get_level_current( | |
216 | struct acpi_video_device *device, | |
a89803df | 217 | unsigned long long *level, bool raw); |
4be44fcd LB |
218 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
219 | u32 level_current, u32 event); | |
8ab58e8e | 220 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 221 | |
21fcb34e | 222 | /* backlight device sysfs support */ |
2f3d000a YL |
223 | static int acpi_video_get_brightness(struct backlight_device *bd) |
224 | { | |
27663c58 | 225 | unsigned long long cur_level; |
38531e6f | 226 | int i; |
7c364e79 | 227 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 228 | |
a89803df | 229 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 230 | return -EINVAL; |
d485ef43 | 231 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < vd->brightness->count; i++) { |
38531e6f | 232 | if (vd->brightness->levels[i] == cur_level) |
d485ef43 | 233 | return i - ACPI_VIDEO_FIRST_LEVEL; |
38531e6f MG |
234 | } |
235 | return 0; | |
2f3d000a YL |
236 | } |
237 | ||
238 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
239 | { | |
d485ef43 | 240 | int request_level = bd->props.brightness + ACPI_VIDEO_FIRST_LEVEL; |
7c364e79 | 241 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 242 | |
8ab58e8e | 243 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
244 | return acpi_video_device_lcd_set_level(vd, |
245 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
246 | } |
247 | ||
acc2472e | 248 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
249 | .get_brightness = acpi_video_get_brightness, |
250 | .update_status = acpi_video_set_brightness, | |
251 | }; | |
252 | ||
702ed512 | 253 | /* thermal cooling device callbacks */ |
d485ef43 DF |
254 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, |
255 | unsigned long *state) | |
702ed512 | 256 | { |
4a703a8f | 257 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
258 | struct acpi_video_device *video = acpi_driver_data(device); |
259 | ||
d485ef43 | 260 | *state = video->brightness->count - ACPI_VIDEO_FIRST_LEVEL - 1; |
6503e5df | 261 | return 0; |
702ed512 ZR |
262 | } |
263 | ||
d485ef43 DF |
264 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, |
265 | unsigned long *state) | |
702ed512 | 266 | { |
4a703a8f | 267 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 268 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 269 | unsigned long long level; |
6503e5df | 270 | int offset; |
702ed512 | 271 | |
a89803df | 272 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 273 | return -EINVAL; |
d485ef43 DF |
274 | for (offset = ACPI_VIDEO_FIRST_LEVEL; offset < video->brightness->count; |
275 | offset++) | |
6503e5df MG |
276 | if (level == video->brightness->levels[offset]) { |
277 | *state = video->brightness->count - offset - 1; | |
278 | return 0; | |
279 | } | |
702ed512 ZR |
280 | |
281 | return -EINVAL; | |
282 | } | |
283 | ||
284 | static int | |
4a703a8f | 285 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 286 | { |
4a703a8f | 287 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
288 | struct acpi_video_device *video = acpi_driver_data(device); |
289 | int level; | |
290 | ||
d485ef43 | 291 | if (state >= video->brightness->count - ACPI_VIDEO_FIRST_LEVEL) |
702ed512 ZR |
292 | return -EINVAL; |
293 | ||
294 | state = video->brightness->count - state; | |
915ea7e4 | 295 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
296 | return acpi_video_device_lcd_set_level(video, level); |
297 | } | |
298 | ||
9c8b04be | 299 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
300 | .get_max_state = video_get_max_state, |
301 | .get_cur_state = video_get_cur_state, | |
302 | .set_cur_state = video_set_cur_state, | |
303 | }; | |
304 | ||
21fcb34e FC |
305 | /* |
306 | * -------------------------------------------------------------------------- | |
307 | * Video Management | |
308 | * -------------------------------------------------------------------------- | |
309 | */ | |
1da177e4 | 310 | |
1da177e4 | 311 | static int |
05950094 | 312 | acpi_video_device_lcd_query_levels(acpi_handle handle, |
4be44fcd | 313 | union acpi_object **levels) |
1da177e4 | 314 | { |
4be44fcd LB |
315 | int status; |
316 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
317 | union acpi_object *obj; | |
1da177e4 | 318 | |
1da177e4 LT |
319 | |
320 | *levels = NULL; | |
321 | ||
05950094 | 322 | status = acpi_evaluate_object(handle, "_BCL", NULL, &buffer); |
1da177e4 | 323 | if (!ACPI_SUCCESS(status)) |
d550d98d | 324 | return status; |
4be44fcd | 325 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 326 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 327 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
328 | status = -EFAULT; |
329 | goto err; | |
330 | } | |
331 | ||
332 | *levels = obj; | |
333 | ||
d550d98d | 334 | return 0; |
1da177e4 | 335 | |
915ea7e4 | 336 | err: |
6044ec88 | 337 | kfree(buffer.pointer); |
1da177e4 | 338 | |
d550d98d | 339 | return status; |
1da177e4 LT |
340 | } |
341 | ||
342 | static int | |
4be44fcd | 343 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 344 | { |
24450c7a | 345 | int status; |
9e6dada9 | 346 | int state; |
1da177e4 | 347 | |
0db98202 JL |
348 | status = acpi_execute_simple_method(device->dev->handle, |
349 | "_BCM", level); | |
24450c7a ZR |
350 | if (ACPI_FAILURE(status)) { |
351 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
352 | return -EIO; | |
353 | } | |
354 | ||
4500ca8e | 355 | device->brightness->curr = level; |
d485ef43 DF |
356 | for (state = ACPI_VIDEO_FIRST_LEVEL; state < device->brightness->count; |
357 | state++) | |
24450c7a | 358 | if (level == device->brightness->levels[state]) { |
1a7c618a | 359 | if (device->backlight) |
d485ef43 DF |
360 | device->backlight->props.brightness = |
361 | state - ACPI_VIDEO_FIRST_LEVEL; | |
24450c7a ZR |
362 | return 0; |
363 | } | |
9e6dada9 | 364 | |
24450c7a ZR |
365 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
366 | return -EINVAL; | |
1da177e4 LT |
367 | } |
368 | ||
45cb50e6 ZR |
369 | /* |
370 | * For some buggy _BQC methods, we need to add a constant value to | |
371 | * the _BQC return value to get the actual current brightness level | |
372 | */ | |
373 | ||
374 | static int bqc_offset_aml_bug_workaround; | |
7ee33baa | 375 | static int video_set_bqc_offset(const struct dmi_system_id *d) |
45cb50e6 ZR |
376 | { |
377 | bqc_offset_aml_bug_workaround = 9; | |
378 | return 0; | |
379 | } | |
380 | ||
7ee33baa | 381 | static int video_disable_backlight_sysfs_if( |
654a182d HG |
382 | const struct dmi_system_id *d) |
383 | { | |
384 | if (disable_backlight_sysfs_if == -1) | |
385 | disable_backlight_sysfs_if = 1; | |
386 | return 0; | |
387 | } | |
388 | ||
e50b9be1 AL |
389 | static int video_set_device_id_scheme(const struct dmi_system_id *d) |
390 | { | |
391 | device_id_scheme = true; | |
392 | return 0; | |
393 | } | |
394 | ||
395 | static int video_enable_only_lcd(const struct dmi_system_id *d) | |
396 | { | |
397 | only_lcd = true; | |
398 | return 0; | |
399 | } | |
400 | ||
4b4b3b20 HG |
401 | static int video_set_report_key_events(const struct dmi_system_id *id) |
402 | { | |
403 | if (report_key_events == -1) | |
404 | report_key_events = (uintptr_t)id->driver_data; | |
405 | return 0; | |
406 | } | |
407 | ||
6faadbbb | 408 | static const struct dmi_system_id video_dmi_table[] = { |
45cb50e6 ZR |
409 | /* |
410 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
411 | */ | |
412 | { | |
413 | .callback = video_set_bqc_offset, | |
414 | .ident = "Acer Aspire 5720", | |
415 | .matches = { | |
416 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
417 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
418 | }, | |
419 | }, | |
5afc4abe LB |
420 | { |
421 | .callback = video_set_bqc_offset, | |
422 | .ident = "Acer Aspire 5710Z", | |
423 | .matches = { | |
424 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
425 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
426 | }, | |
427 | }, | |
34ac272b ZR |
428 | { |
429 | .callback = video_set_bqc_offset, | |
430 | .ident = "eMachines E510", | |
431 | .matches = { | |
432 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
433 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
434 | }, | |
435 | }, | |
93bcece2 ZR |
436 | { |
437 | .callback = video_set_bqc_offset, | |
438 | .ident = "Acer Aspire 5315", | |
439 | .matches = { | |
440 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
441 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
442 | }, | |
443 | }, | |
152a4e63 ZR |
444 | { |
445 | .callback = video_set_bqc_offset, | |
446 | .ident = "Acer Aspire 7720", | |
447 | .matches = { | |
448 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
449 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
450 | }, | |
451 | }, | |
5f24079b | 452 | |
654a182d HG |
453 | /* |
454 | * Some machines have a broken acpi-video interface for brightness | |
455 | * control, but still need an acpi_video_device_lcd_set_level() call | |
456 | * on resume to turn the backlight power on. We Enable backlight | |
457 | * control on these systems, but do not register a backlight sysfs | |
458 | * as brightness control does not work. | |
459 | */ | |
de588b8f HG |
460 | { |
461 | /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ | |
462 | .callback = video_disable_backlight_sysfs_if, | |
463 | .ident = "Toshiba Portege R700", | |
464 | .matches = { | |
465 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
466 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R700"), | |
467 | }, | |
468 | }, | |
654a182d HG |
469 | { |
470 | /* https://bugs.freedesktop.org/show_bug.cgi?id=82634 */ | |
471 | .callback = video_disable_backlight_sysfs_if, | |
472 | .ident = "Toshiba Portege R830", | |
473 | .matches = { | |
474 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
475 | DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE R830"), | |
476 | }, | |
477 | }, | |
b21f2e81 HG |
478 | { |
479 | /* https://bugzilla.kernel.org/show_bug.cgi?id=21012 */ | |
480 | .callback = video_disable_backlight_sysfs_if, | |
481 | .ident = "Toshiba Satellite R830", | |
482 | .matches = { | |
483 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
484 | DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE R830"), | |
485 | }, | |
486 | }, | |
e50b9be1 AL |
487 | /* |
488 | * Some machine's _DOD IDs don't have bit 31(Device ID Scheme) set | |
489 | * but the IDs actually follow the Device ID Scheme. | |
490 | */ | |
491 | { | |
492 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
493 | .callback = video_set_device_id_scheme, | |
494 | .ident = "ESPRIMO Mobile M9410", | |
495 | .matches = { | |
496 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
497 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"), | |
498 | }, | |
499 | }, | |
500 | /* | |
501 | * Some machines have multiple video output devices, but only the one | |
502 | * that is the type of LCD can do the backlight control so we should not | |
503 | * register backlight interface for other video output devices. | |
504 | */ | |
505 | { | |
506 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
507 | .callback = video_enable_only_lcd, | |
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 | }, | |
4b4b3b20 HG |
514 | /* |
515 | * Some machines report wrong key events on the acpi-bus, suppress | |
516 | * key event reporting on these. Note this is only intended to work | |
517 | * around events which are plain wrong. In some cases we get double | |
518 | * events, in this case acpi-video is considered the canonical source | |
519 | * and the events from the other source should be filtered. E.g. | |
520 | * by calling acpi_video_handles_brightness_key_presses() from the | |
521 | * vendor acpi/wmi driver or by using /lib/udev/hwdb.d/60-keyboard.hwdb | |
522 | */ | |
523 | { | |
524 | .callback = video_set_report_key_events, | |
525 | .driver_data = (void *)((uintptr_t)REPORT_OUTPUT_KEY_EVENTS), | |
526 | .ident = "Dell Vostro V131", | |
527 | .matches = { | |
528 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
529 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), | |
530 | }, | |
531 | }, | |
45cb50e6 ZR |
532 | {} |
533 | }; | |
534 | ||
994fa63c DB |
535 | static unsigned long long |
536 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
537 | unsigned long long bqc_value) | |
538 | { | |
539 | unsigned long long level; | |
540 | ||
541 | if (device->brightness->flags._BQC_use_index) { | |
542 | /* | |
d485ef43 DF |
543 | * _BQC returns an index that doesn't account for the first 2 |
544 | * items with special meaning (see enum acpi_video_level_idx), | |
545 | * so we need to compensate for that by offsetting ourselves | |
994fa63c DB |
546 | */ |
547 | if (device->brightness->flags._BCL_reversed) | |
d485ef43 DF |
548 | bqc_value = device->brightness->count - |
549 | ACPI_VIDEO_FIRST_LEVEL - 1 - bqc_value; | |
994fa63c | 550 | |
d485ef43 DF |
551 | level = device->brightness->levels[bqc_value + |
552 | ACPI_VIDEO_FIRST_LEVEL]; | |
994fa63c DB |
553 | } else { |
554 | level = bqc_value; | |
555 | } | |
556 | ||
557 | level += bqc_offset_aml_bug_workaround; | |
558 | ||
559 | return level; | |
560 | } | |
561 | ||
1da177e4 | 562 | static int |
4be44fcd | 563 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 564 | unsigned long long *level, bool raw) |
1da177e4 | 565 | { |
c8890f90 | 566 | acpi_status status = AE_OK; |
4e231fa4 | 567 | int i; |
c8890f90 | 568 | |
c60d638e ZR |
569 | if (device->cap._BQC || device->cap._BCQ) { |
570 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
571 | ||
572 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
573 | NULL, level); |
574 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
575 | if (raw) { |
576 | /* | |
577 | * Caller has indicated he wants the raw | |
578 | * value returned by _BQC, so don't furtherly | |
579 | * mess with the value. | |
580 | */ | |
581 | return 0; | |
582 | } | |
583 | ||
994fa63c | 584 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 585 | |
d485ef43 DF |
586 | for (i = ACPI_VIDEO_FIRST_LEVEL; |
587 | i < device->brightness->count; i++) | |
4e231fa4 VS |
588 | if (device->brightness->levels[i] == *level) { |
589 | device->brightness->curr = *level; | |
590 | return 0; | |
915ea7e4 | 591 | } |
a89803df DB |
592 | /* |
593 | * BQC returned an invalid level. | |
594 | * Stop using it. | |
595 | */ | |
596 | ACPI_WARNING((AE_INFO, | |
597 | "%s returned an invalid level", | |
598 | buf)); | |
599 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 600 | } else { |
21fcb34e FC |
601 | /* |
602 | * Fixme: | |
c8890f90 ZR |
603 | * should we return an error or ignore this failure? |
604 | * dev->brightness->curr is a cached value which stores | |
605 | * the correct current backlight level in most cases. | |
606 | * ACPI video backlight still works w/ buggy _BQC. | |
607 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
608 | */ | |
c60d638e ZR |
609 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
610 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
611 | } |
612 | } | |
613 | ||
4500ca8e | 614 | *level = device->brightness->curr; |
c8890f90 | 615 | return 0; |
1da177e4 LT |
616 | } |
617 | ||
618 | static int | |
4be44fcd LB |
619 | acpi_video_device_EDID(struct acpi_video_device *device, |
620 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 621 | { |
4be44fcd LB |
622 | int status; |
623 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
624 | union acpi_object *obj; | |
625 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
626 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 627 | |
1da177e4 LT |
628 | |
629 | *edid = NULL; | |
630 | ||
631 | if (!device) | |
d550d98d | 632 | return -ENODEV; |
1da177e4 LT |
633 | if (length == 128) |
634 | arg0.integer.value = 1; | |
635 | else if (length == 256) | |
636 | arg0.integer.value = 2; | |
637 | else | |
d550d98d | 638 | return -EINVAL; |
1da177e4 | 639 | |
90130268 | 640 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 641 | if (ACPI_FAILURE(status)) |
d550d98d | 642 | return -ENODEV; |
1da177e4 | 643 | |
50dd0969 | 644 | obj = buffer.pointer; |
1da177e4 LT |
645 | |
646 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
647 | *edid = obj; | |
648 | else { | |
6468463a | 649 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
650 | status = -EFAULT; |
651 | kfree(obj); | |
652 | } | |
653 | ||
d550d98d | 654 | return status; |
1da177e4 LT |
655 | } |
656 | ||
1da177e4 LT |
657 | /* bus */ |
658 | ||
1da177e4 LT |
659 | /* |
660 | * Arg: | |
21fcb34e FC |
661 | * video : video bus device pointer |
662 | * bios_flag : | |
1da177e4 LT |
663 | * 0. The system BIOS should NOT automatically switch(toggle) |
664 | * the active display output. | |
665 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 666 | * active display output. No switch event. |
1da177e4 LT |
667 | * 2. The _DGS value should be locked. |
668 | * 3. The system BIOS should not automatically switch (toggle) the | |
669 | * active display output, but instead generate the display switch | |
670 | * event notify code. | |
671 | * lcd_flag : | |
672 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 673 | * of the LCD when the power changes from AC to DC |
21fcb34e | 674 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 675 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 676 | * Return Value: |
ea9f8856 | 677 | * -EINVAL wrong arg. |
1da177e4 LT |
678 | */ |
679 | ||
680 | static int | |
4be44fcd | 681 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 682 | { |
ea9f8856 | 683 | acpi_status status; |
1da177e4 | 684 | |
b0373843 ZR |
685 | if (!video->cap._DOS) |
686 | return 0; | |
1da177e4 | 687 | |
ea9f8856 IM |
688 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
689 | return -EINVAL; | |
0db98202 JL |
690 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
691 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
692 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
693 | if (ACPI_FAILURE(status)) |
694 | return -EIO; | |
1da177e4 | 695 | |
ea9f8856 | 696 | return 0; |
1da177e4 LT |
697 | } |
698 | ||
935e5f29 ZR |
699 | /* |
700 | * Simple comparison function used to sort backlight levels. | |
701 | */ | |
702 | ||
703 | static int | |
704 | acpi_video_cmp_level(const void *a, const void *b) | |
705 | { | |
706 | return *(int *)a - *(int *)b; | |
707 | } | |
708 | ||
a50188da AL |
709 | /* |
710 | * Decides if _BQC/_BCQ for this system is usable | |
711 | * | |
712 | * We do this by changing the level first and then read out the current | |
713 | * brightness level, if the value does not match, find out if it is using | |
714 | * index. If not, clear the _BQC/_BCQ capability. | |
715 | */ | |
716 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
717 | int max_level, int current_level) | |
718 | { | |
719 | struct acpi_video_device_brightness *br = device->brightness; | |
720 | int result; | |
721 | unsigned long long level; | |
722 | int test_level; | |
723 | ||
724 | /* don't mess with existing known broken systems */ | |
725 | if (bqc_offset_aml_bug_workaround) | |
726 | return 0; | |
727 | ||
728 | /* | |
729 | * Some systems always report current brightness level as maximum | |
592c8095 DF |
730 | * through _BQC, we need to test another value for them. However, |
731 | * there is a subtlety: | |
732 | * | |
733 | * If the _BCL package ordering is descending, the first level | |
734 | * (br->levels[2]) is likely to be 0, and if the number of levels | |
735 | * matches the number of steps, we might confuse a returned level to | |
736 | * mean the index. | |
737 | * | |
738 | * For example: | |
739 | * | |
740 | * current_level = max_level = 100 | |
741 | * test_level = 0 | |
742 | * returned level = 100 | |
743 | * | |
744 | * In this case 100 means the level, not the index, and _BCM failed. | |
745 | * Still, if the _BCL package ordering is descending, the index of | |
746 | * level 0 is also 100, so we assume _BQC is indexed, when it's not. | |
747 | * | |
748 | * This causes all _BQC calls to return bogus values causing weird | |
749 | * behavior from the user's perspective. For example: | |
750 | * | |
751 | * xbacklight -set 10; xbacklight -set 20; | |
752 | * | |
753 | * would flash to 90% and then slowly down to the desired level (20). | |
754 | * | |
755 | * The solution is simple; test anything other than the first level | |
756 | * (e.g. 1). | |
a50188da | 757 | */ |
d485ef43 DF |
758 | test_level = current_level == max_level |
759 | ? br->levels[ACPI_VIDEO_FIRST_LEVEL + 1] | |
760 | : max_level; | |
a50188da AL |
761 | |
762 | result = acpi_video_device_lcd_set_level(device, test_level); | |
763 | if (result) | |
764 | return result; | |
765 | ||
766 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
767 | if (result) | |
768 | return result; | |
769 | ||
770 | if (level != test_level) { | |
771 | /* buggy _BQC found, need to find out if it uses index */ | |
772 | if (level < br->count) { | |
773 | if (br->flags._BCL_reversed) | |
d485ef43 DF |
774 | level = br->count - ACPI_VIDEO_FIRST_LEVEL - 1 - level; |
775 | if (br->levels[level + ACPI_VIDEO_FIRST_LEVEL] == test_level) | |
a50188da AL |
776 | br->flags._BQC_use_index = 1; |
777 | } | |
778 | ||
779 | if (!br->flags._BQC_use_index) | |
780 | device->cap._BQC = device->cap._BCQ = 0; | |
781 | } | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
05950094 | 786 | int acpi_video_get_levels(struct acpi_device *device, |
9f9cd7ee AL |
787 | struct acpi_video_device_brightness **dev_br, |
788 | int *pmax_level) | |
469778c1 JJ |
789 | { |
790 | union acpi_object *obj = NULL; | |
d32f6947 | 791 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
469778c1 JJ |
792 | union acpi_object *o; |
793 | struct acpi_video_device_brightness *br = NULL; | |
05950094 | 794 | int result = 0; |
bd8ba205 | 795 | u32 value; |
469778c1 | 796 | |
05950094 AL |
797 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device->handle, |
798 | &obj))) { | |
469778c1 JJ |
799 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " |
800 | "LCD brightness level\n")); | |
05950094 | 801 | result = -ENODEV; |
469778c1 JJ |
802 | goto out; |
803 | } | |
804 | ||
d485ef43 | 805 | if (obj->package.count < ACPI_VIDEO_FIRST_LEVEL) { |
05950094 | 806 | result = -EINVAL; |
469778c1 | 807 | goto out; |
05950094 | 808 | } |
469778c1 JJ |
809 | |
810 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
811 | if (!br) { | |
812 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 813 | result = -ENOMEM; |
469778c1 JJ |
814 | goto out; |
815 | } | |
816 | ||
592c8095 DF |
817 | /* |
818 | * Note that we have to reserve 2 extra items (ACPI_VIDEO_FIRST_LEVEL), | |
819 | * in order to account for buggy BIOS which don't export the first two | |
820 | * special levels (see below) | |
821 | */ | |
6da2ec56 KC |
822 | br->levels = kmalloc_array(obj->package.count + ACPI_VIDEO_FIRST_LEVEL, |
823 | sizeof(*br->levels), | |
824 | GFP_KERNEL); | |
1a7c618a ZR |
825 | if (!br->levels) { |
826 | result = -ENOMEM; | |
469778c1 | 827 | goto out_free; |
1a7c618a | 828 | } |
469778c1 JJ |
829 | |
830 | for (i = 0; i < obj->package.count; i++) { | |
831 | o = (union acpi_object *)&obj->package.elements[i]; | |
832 | if (o->type != ACPI_TYPE_INTEGER) { | |
833 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
834 | continue; | |
835 | } | |
bd8ba205 HG |
836 | value = (u32) o->integer.value; |
837 | /* Skip duplicate entries */ | |
d485ef43 DF |
838 | if (count > ACPI_VIDEO_FIRST_LEVEL |
839 | && br->levels[count - 1] == value) | |
bd8ba205 HG |
840 | continue; |
841 | ||
842 | br->levels[count] = value; | |
469778c1 JJ |
843 | |
844 | if (br->levels[count] > max_level) | |
845 | max_level = br->levels[count]; | |
846 | count++; | |
847 | } | |
848 | ||
d32f6947 ZR |
849 | /* |
850 | * some buggy BIOS don't export the levels | |
851 | * when machine is on AC/Battery in _BCL package. | |
852 | * In this case, the first two elements in _BCL packages | |
853 | * are also supported brightness levels that OS should take care of. | |
854 | */ | |
d485ef43 DF |
855 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < count; i++) { |
856 | if (br->levels[i] == br->levels[ACPI_VIDEO_AC_LEVEL]) | |
d32f6947 | 857 | level_ac_battery++; |
d485ef43 | 858 | if (br->levels[i] == br->levels[ACPI_VIDEO_BATTERY_LEVEL]) |
90af2cf6 ZR |
859 | level_ac_battery++; |
860 | } | |
d32f6947 | 861 | |
d485ef43 DF |
862 | if (level_ac_battery < ACPI_VIDEO_FIRST_LEVEL) { |
863 | level_ac_battery = ACPI_VIDEO_FIRST_LEVEL - level_ac_battery; | |
d32f6947 | 864 | br->flags._BCL_no_ac_battery_levels = 1; |
d485ef43 DF |
865 | for (i = (count - 1 + level_ac_battery); |
866 | i >= ACPI_VIDEO_FIRST_LEVEL; i--) | |
d32f6947 ZR |
867 | br->levels[i] = br->levels[i - level_ac_battery]; |
868 | count += level_ac_battery; | |
d485ef43 | 869 | } else if (level_ac_battery > ACPI_VIDEO_FIRST_LEVEL) |
bf6787eb | 870 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 871 | |
d80fb99f | 872 | /* Check if the _BCL package is in a reversed order */ |
d485ef43 | 873 | if (max_level == br->levels[ACPI_VIDEO_FIRST_LEVEL]) { |
d80fb99f | 874 | br->flags._BCL_reversed = 1; |
d485ef43 DF |
875 | sort(&br->levels[ACPI_VIDEO_FIRST_LEVEL], |
876 | count - ACPI_VIDEO_FIRST_LEVEL, | |
877 | sizeof(br->levels[ACPI_VIDEO_FIRST_LEVEL]), | |
878 | acpi_video_cmp_level, NULL); | |
d80fb99f ZR |
879 | } else if (max_level != br->levels[count - 1]) |
880 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 881 | "Found unordered _BCL package")); |
469778c1 JJ |
882 | |
883 | br->count = count; | |
05950094 | 884 | *dev_br = br; |
9f9cd7ee AL |
885 | if (pmax_level) |
886 | *pmax_level = max_level; | |
05950094 AL |
887 | |
888 | out: | |
889 | kfree(obj); | |
890 | return result; | |
891 | out_free: | |
892 | kfree(br); | |
893 | goto out; | |
894 | } | |
895 | EXPORT_SYMBOL(acpi_video_get_levels); | |
896 | ||
897 | /* | |
898 | * Arg: | |
899 | * device : video output device (LCD, CRT, ..) | |
900 | * | |
901 | * Return Value: | |
902 | * Maximum brightness level | |
903 | * | |
904 | * Allocate and initialize device->brightness. | |
905 | */ | |
906 | ||
907 | static int | |
908 | acpi_video_init_brightness(struct acpi_video_device *device) | |
909 | { | |
910 | int i, max_level = 0; | |
911 | unsigned long long level, level_old; | |
912 | struct acpi_video_device_brightness *br = NULL; | |
913 | int result = -EINVAL; | |
914 | ||
9f9cd7ee | 915 | result = acpi_video_get_levels(device->dev, &br, &max_level); |
05950094 AL |
916 | if (result) |
917 | return result; | |
469778c1 | 918 | device->brightness = br; |
1a7c618a | 919 | |
1a7c618a | 920 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 921 | br->curr = level = max_level; |
e047cca6 ZR |
922 | |
923 | if (!device->cap._BQC) | |
924 | goto set_level; | |
925 | ||
a89803df DB |
926 | result = acpi_video_device_lcd_get_level_current(device, |
927 | &level_old, true); | |
1a7c618a ZR |
928 | if (result) |
929 | goto out_free_levels; | |
930 | ||
a50188da | 931 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
932 | if (result) |
933 | goto out_free_levels; | |
a50188da AL |
934 | /* |
935 | * cap._BQC may get cleared due to _BQC is found to be broken | |
936 | * in acpi_video_bqc_quirk, so check again here. | |
937 | */ | |
938 | if (!device->cap._BQC) | |
939 | goto set_level; | |
e047cca6 | 940 | |
545ef368 AL |
941 | level = acpi_video_bqc_value_to_level(device, level_old); |
942 | /* | |
943 | * On some buggy laptops, _BQC returns an uninitialized | |
944 | * value when invoked for the first time, i.e. | |
945 | * level_old is invalid (no matter whether it's a level | |
946 | * or an index). Set the backlight to max_level in this case. | |
947 | */ | |
d485ef43 | 948 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < br->count; i++) |
545ef368 AL |
949 | if (level == br->levels[i]) |
950 | break; | |
951 | if (i == br->count || !level) | |
952 | level = max_level; | |
e047cca6 | 953 | |
e047cca6 | 954 | set_level: |
90c53ca4 | 955 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
956 | if (result) |
957 | goto out_free_levels; | |
1a7c618a | 958 | |
d32f6947 | 959 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
d485ef43 DF |
960 | "found %d brightness levels\n", |
961 | br->count - ACPI_VIDEO_FIRST_LEVEL)); | |
05950094 | 962 | return 0; |
469778c1 JJ |
963 | |
964 | out_free_levels: | |
965 | kfree(br->levels); | |
469778c1 | 966 | kfree(br); |
469778c1 | 967 | device->brightness = NULL; |
1a7c618a | 968 | return result; |
469778c1 JJ |
969 | } |
970 | ||
971 | /* | |
972 | * Arg: | |
973 | * device : video output device (LCD, CRT, ..) | |
974 | * | |
975 | * Return Value: | |
21fcb34e | 976 | * None |
1da177e4 | 977 | * |
98fb8fe1 | 978 | * Find out all required AML methods defined under the output |
1da177e4 LT |
979 | * device. |
980 | */ | |
981 | ||
4be44fcd | 982 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 983 | { |
952c63e9 | 984 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 985 | device->cap._ADR = 1; |
952c63e9 | 986 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 987 | device->cap._BCL = 1; |
952c63e9 | 988 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 989 | device->cap._BCM = 1; |
952c63e9 | 990 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 991 | device->cap._BQC = 1; |
952c63e9 | 992 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
993 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
994 | device->cap._BCQ = 1; | |
995 | } | |
996 | ||
952c63e9 | 997 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 998 | device->cap._DDC = 1; |
1da177e4 LT |
999 | } |
1000 | ||
1001 | /* | |
21fcb34e FC |
1002 | * Arg: |
1003 | * device : video output device (VGA) | |
1da177e4 LT |
1004 | * |
1005 | * Return Value: | |
21fcb34e | 1006 | * None |
1da177e4 | 1007 | * |
98fb8fe1 | 1008 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
1009 | */ |
1010 | ||
4be44fcd | 1011 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1012 | { |
952c63e9 | 1013 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 1014 | video->cap._DOS = 1; |
952c63e9 | 1015 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 1016 | video->cap._DOD = 1; |
952c63e9 | 1017 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 1018 | video->cap._ROM = 1; |
952c63e9 | 1019 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 1020 | video->cap._GPD = 1; |
952c63e9 | 1021 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 1022 | video->cap._SPD = 1; |
952c63e9 | 1023 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 1024 | video->cap._VPO = 1; |
1da177e4 LT |
1025 | } |
1026 | ||
1027 | /* | |
1028 | * Check whether the video bus device has required AML method to | |
1029 | * support the desired features | |
1030 | */ | |
1031 | ||
4be44fcd | 1032 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1033 | { |
4be44fcd | 1034 | acpi_status status = -ENOENT; |
1e4cffe7 | 1035 | struct pci_dev *dev; |
1da177e4 LT |
1036 | |
1037 | if (!video) | |
d550d98d | 1038 | return -EINVAL; |
1da177e4 | 1039 | |
1e4cffe7 | 1040 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1041 | if (!dev) |
1042 | return -ENODEV; | |
1e4cffe7 | 1043 | pci_dev_put(dev); |
22c13f9d | 1044 | |
21fcb34e FC |
1045 | /* |
1046 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1047 | * to check well known required nodes. |
1048 | */ | |
1049 | ||
98fb8fe1 | 1050 | /* Does this device support video switching? */ |
3a1151e3 SB |
1051 | if (video->cap._DOS || video->cap._DOD) { |
1052 | if (!video->cap._DOS) { | |
1053 | printk(KERN_WARNING FW_BUG | |
1054 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1055 | acpi_device_bid(video->device)); | |
1056 | } | |
1da177e4 LT |
1057 | video->flags.multihead = 1; |
1058 | status = 0; | |
1059 | } | |
1060 | ||
98fb8fe1 | 1061 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1062 | if (video->cap._ROM) { |
1da177e4 LT |
1063 | video->flags.rom = 1; |
1064 | status = 0; | |
1065 | } | |
1066 | ||
98fb8fe1 | 1067 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1068 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1069 | video->flags.post = 1; |
1070 | status = 0; | |
1071 | } | |
1072 | ||
d550d98d | 1073 | return status; |
1da177e4 LT |
1074 | } |
1075 | ||
21fcb34e FC |
1076 | /* |
1077 | * -------------------------------------------------------------------------- | |
1078 | * Driver Interface | |
1079 | * -------------------------------------------------------------------------- | |
1080 | */ | |
1da177e4 LT |
1081 | |
1082 | /* device interface */ | |
915ea7e4 | 1083 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1084 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1085 | { | |
78eed028 DT |
1086 | struct acpi_video_enumerated_device *ids; |
1087 | int i; | |
1088 | ||
1089 | for (i = 0; i < video->attached_count; i++) { | |
1090 | ids = &video->attached_array[i]; | |
1091 | if ((ids->value.int_val & 0xffff) == device_id) | |
1092 | return &ids->value.attrib; | |
1093 | } | |
82cae999 | 1094 | |
82cae999 RZ |
1095 | return NULL; |
1096 | } | |
1da177e4 | 1097 | |
e92a7162 MG |
1098 | static int |
1099 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1100 | unsigned long device_id) | |
1101 | { | |
1102 | struct acpi_video_enumerated_device *ids; | |
1103 | int i; | |
1104 | ||
1105 | for (i = 0; i < video->attached_count; i++) { | |
1106 | ids = &video->attached_array[i]; | |
1107 | if ((ids->value.int_val & 0xffff) == device_id) | |
1108 | return ids->value.int_val; | |
1109 | } | |
1110 | ||
1111 | return 0; | |
1112 | } | |
1113 | ||
1da177e4 | 1114 | static int |
4be44fcd LB |
1115 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1116 | struct acpi_video_bus *video) | |
1da177e4 | 1117 | { |
27663c58 | 1118 | unsigned long long device_id; |
e92a7162 | 1119 | int status, device_type; |
4be44fcd | 1120 | struct acpi_video_device *data; |
915ea7e4 | 1121 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1122 | |
4be44fcd LB |
1123 | status = |
1124 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1125 | /* Some device omits _ADR, we skip them instead of fail */ |
1126 | if (ACPI_FAILURE(status)) | |
1127 | return 0; | |
1da177e4 | 1128 | |
91e13aa3 AL |
1129 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1130 | if (!data) | |
1131 | return -ENOMEM; | |
82cae999 | 1132 | |
91e13aa3 AL |
1133 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1134 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1135 | device->driver_data = data; | |
1136 | ||
1137 | data->device_id = device_id; | |
1138 | data->video = video; | |
1139 | data->dev = device; | |
8ab58e8e LT |
1140 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1141 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1142 | |
1143 | attribute = acpi_video_get_device_attr(video, device_id); | |
1144 | ||
e50b9be1 | 1145 | if (attribute && (attribute->device_id_scheme || device_id_scheme)) { |
91e13aa3 AL |
1146 | switch (attribute->display_type) { |
1147 | case ACPI_VIDEO_DISPLAY_CRT: | |
1148 | data->flags.crt = 1; | |
1149 | break; | |
1150 | case ACPI_VIDEO_DISPLAY_TV: | |
1151 | data->flags.tvout = 1; | |
1152 | break; | |
1153 | case ACPI_VIDEO_DISPLAY_DVI: | |
1154 | data->flags.dvi = 1; | |
1155 | break; | |
1156 | case ACPI_VIDEO_DISPLAY_LCD: | |
1157 | data->flags.lcd = 1; | |
1158 | break; | |
1159 | default: | |
1160 | data->flags.unknown = 1; | |
1161 | break; | |
1162 | } | |
915ea7e4 | 1163 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1164 | data->flags.bios = 1; |
1165 | } else { | |
1166 | /* Check for legacy IDs */ | |
1167 | device_type = acpi_video_get_device_type(video, device_id); | |
1168 | /* Ignore bits 16 and 18-20 */ | |
1169 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1170 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1171 | data->flags.crt = 1; | |
1172 | break; | |
1173 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1174 | data->flags.lcd = 1; | |
1175 | break; | |
1176 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1177 | data->flags.tvout = 1; | |
1178 | break; | |
1179 | default: | |
1180 | data->flags.unknown = 1; | |
e92a7162 | 1181 | } |
91e13aa3 | 1182 | } |
4be44fcd | 1183 | |
91e13aa3 AL |
1184 | acpi_video_device_bind(video, data); |
1185 | acpi_video_device_find_cap(data); | |
1da177e4 | 1186 | |
91e13aa3 AL |
1187 | mutex_lock(&video->device_list_lock); |
1188 | list_add_tail(&data->entry, &video->video_device_list); | |
1189 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1190 | |
91e13aa3 | 1191 | return status; |
1da177e4 LT |
1192 | } |
1193 | ||
1194 | /* | |
1195 | * Arg: | |
21fcb34e | 1196 | * video : video bus device |
1da177e4 LT |
1197 | * |
1198 | * Return: | |
21fcb34e FC |
1199 | * none |
1200 | * | |
1201 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1202 | * bind the ids with the corresponding video devices |
1203 | * under the video bus. | |
4be44fcd | 1204 | */ |
1da177e4 | 1205 | |
4be44fcd | 1206 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1207 | { |
ff102ea9 DT |
1208 | struct acpi_video_device *dev; |
1209 | ||
bbac81f5 | 1210 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1211 | |
1212 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1213 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1214 | |
bbac81f5 | 1215 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1216 | } |
1217 | ||
1218 | /* | |
1219 | * Arg: | |
21fcb34e FC |
1220 | * video : video bus device |
1221 | * device : video output device under the video | |
1222 | * bus | |
1da177e4 LT |
1223 | * |
1224 | * Return: | |
21fcb34e FC |
1225 | * none |
1226 | * | |
1da177e4 LT |
1227 | * Bind the ids with the corresponding video devices |
1228 | * under the video bus. | |
4be44fcd | 1229 | */ |
1da177e4 LT |
1230 | |
1231 | static void | |
4be44fcd LB |
1232 | acpi_video_device_bind(struct acpi_video_bus *video, |
1233 | struct acpi_video_device *device) | |
1da177e4 | 1234 | { |
78eed028 | 1235 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1236 | int i; |
1da177e4 | 1237 | |
78eed028 DT |
1238 | for (i = 0; i < video->attached_count; i++) { |
1239 | ids = &video->attached_array[i]; | |
1240 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1241 | ids->bind_info = device; | |
1da177e4 LT |
1242 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1243 | } | |
1244 | } | |
1da177e4 LT |
1245 | } |
1246 | ||
0b8db271 AL |
1247 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1248 | { | |
1249 | struct acpi_video_bus *video = device->video; | |
1250 | int i; | |
1251 | ||
b4df4636 AL |
1252 | /* |
1253 | * If we have a broken _DOD or we have more than 8 output devices | |
1254 | * under the graphics controller node that we can't proper deal with | |
1255 | * in the operation region code currently, no need to test. | |
1256 | */ | |
1257 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1258 | return true; |
1259 | ||
1260 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1261 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1262 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1263 | return true; |
1264 | } | |
1265 | ||
1266 | return false; | |
1267 | } | |
1268 | ||
1da177e4 LT |
1269 | /* |
1270 | * Arg: | |
21fcb34e | 1271 | * video : video bus device |
1da177e4 LT |
1272 | * |
1273 | * Return: | |
21fcb34e FC |
1274 | * < 0 : error |
1275 | * | |
1da177e4 LT |
1276 | * Call _DOD to enumerate all devices attached to display adapter |
1277 | * | |
4be44fcd | 1278 | */ |
1da177e4 LT |
1279 | |
1280 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1281 | { | |
4be44fcd LB |
1282 | int status; |
1283 | int count; | |
1284 | int i; | |
78eed028 | 1285 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1286 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1287 | union acpi_object *dod = NULL; | |
1288 | union acpi_object *obj; | |
1da177e4 | 1289 | |
e34fbbac AH |
1290 | if (!video->cap._DOD) |
1291 | return AE_NOT_EXIST; | |
1292 | ||
90130268 | 1293 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1294 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1295 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1296 | return status; |
1da177e4 LT |
1297 | } |
1298 | ||
50dd0969 | 1299 | dod = buffer.pointer; |
1da177e4 | 1300 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1301 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1302 | status = -EFAULT; |
1303 | goto out; | |
1304 | } | |
1305 | ||
1306 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1307 | dod->package.count)); |
1da177e4 | 1308 | |
78eed028 DT |
1309 | active_list = kcalloc(1 + dod->package.count, |
1310 | sizeof(struct acpi_video_enumerated_device), | |
1311 | GFP_KERNEL); | |
1312 | if (!active_list) { | |
1da177e4 LT |
1313 | status = -ENOMEM; |
1314 | goto out; | |
1315 | } | |
1316 | ||
1317 | count = 0; | |
1318 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1319 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1320 | |
1321 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1322 | printk(KERN_ERR PREFIX |
1323 | "Invalid _DOD data in element %d\n", i); | |
1324 | continue; | |
1da177e4 | 1325 | } |
78eed028 DT |
1326 | |
1327 | active_list[count].value.int_val = obj->integer.value; | |
1328 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1329 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1330 | (int)obj->integer.value)); | |
1da177e4 LT |
1331 | count++; |
1332 | } | |
1da177e4 | 1333 | |
6044ec88 | 1334 | kfree(video->attached_array); |
4be44fcd | 1335 | |
78eed028 | 1336 | video->attached_array = active_list; |
1da177e4 | 1337 | video->attached_count = count; |
78eed028 | 1338 | |
915ea7e4 | 1339 | out: |
02438d87 | 1340 | kfree(buffer.pointer); |
d550d98d | 1341 | return status; |
1da177e4 LT |
1342 | } |
1343 | ||
4be44fcd LB |
1344 | static int |
1345 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1346 | u32 level_current, u32 event) | |
1da177e4 | 1347 | { |
63f0edfc | 1348 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1349 | max = max_below = 0; |
1350 | min = min_above = 255; | |
63f0edfc | 1351 | /* Find closest level to level_current */ |
d485ef43 | 1352 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) { |
63f0edfc AS |
1353 | l = device->brightness->levels[i]; |
1354 | if (abs(l - level_current) < abs(delta)) { | |
1355 | delta = l - level_current; | |
1356 | if (!delta) | |
1357 | break; | |
1358 | } | |
1359 | } | |
1360 | /* Ajust level_current to closest available level */ | |
1361 | level_current += delta; | |
d485ef43 | 1362 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) { |
f4715189 TT |
1363 | l = device->brightness->levels[i]; |
1364 | if (l < min) | |
1365 | min = l; | |
1366 | if (l > max) | |
1367 | max = l; | |
1368 | if (l < min_above && l > level_current) | |
1369 | min_above = l; | |
1370 | if (l > max_below && l < level_current) | |
1371 | max_below = l; | |
1372 | } | |
1373 | ||
1374 | switch (event) { | |
1375 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1376 | return (level_current < max) ? min_above : min; | |
1377 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1378 | return (level_current < max) ? min_above : max; | |
1379 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1380 | return (level_current > min) ? max_below : min; | |
1381 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1382 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1383 | return 0; | |
1384 | default: | |
1385 | return level_current; | |
1386 | } | |
1da177e4 LT |
1387 | } |
1388 | ||
8ab58e8e LT |
1389 | static void |
1390 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1391 | { |
8ab58e8e LT |
1392 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1393 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1394 | unsigned long long level_current, level_next; |
8ab58e8e | 1395 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1396 | int result = -EINVAL; |
1397 | ||
fbc9fe1b | 1398 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
654a182d | 1399 | if (!device->backlight) |
8ab58e8e | 1400 | return; |
28c32e99 | 1401 | |
469778c1 | 1402 | if (!device->brightness) |
c8890f90 ZR |
1403 | goto out; |
1404 | ||
1405 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1406 | &level_current, |
1407 | false); | |
c8890f90 ZR |
1408 | if (result) |
1409 | goto out; | |
1410 | ||
1da177e4 | 1411 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1412 | |
24450c7a | 1413 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1414 | |
36342742 MG |
1415 | if (!result) |
1416 | backlight_force_update(device->backlight, | |
1417 | BACKLIGHT_UPDATE_HOTKEY); | |
1418 | ||
c8890f90 ZR |
1419 | out: |
1420 | if (result) | |
1421 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1422 | } |
1423 | ||
e92a7162 MG |
1424 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1425 | void **edid) | |
1426 | { | |
1427 | struct acpi_video_bus *video; | |
1428 | struct acpi_video_device *video_device; | |
1429 | union acpi_object *buffer = NULL; | |
1430 | acpi_status status; | |
1431 | int i, length; | |
1432 | ||
1433 | if (!device || !acpi_driver_data(device)) | |
1434 | return -EINVAL; | |
1435 | ||
1436 | video = acpi_driver_data(device); | |
1437 | ||
1438 | for (i = 0; i < video->attached_count; i++) { | |
1439 | video_device = video->attached_array[i].bind_info; | |
1440 | length = 256; | |
1441 | ||
1442 | if (!video_device) | |
1443 | continue; | |
1444 | ||
82069552 ZR |
1445 | if (!video_device->cap._DDC) |
1446 | continue; | |
1447 | ||
e92a7162 MG |
1448 | if (type) { |
1449 | switch (type) { | |
1450 | case ACPI_VIDEO_DISPLAY_CRT: | |
1451 | if (!video_device->flags.crt) | |
1452 | continue; | |
1453 | break; | |
1454 | case ACPI_VIDEO_DISPLAY_TV: | |
1455 | if (!video_device->flags.tvout) | |
1456 | continue; | |
1457 | break; | |
1458 | case ACPI_VIDEO_DISPLAY_DVI: | |
1459 | if (!video_device->flags.dvi) | |
1460 | continue; | |
1461 | break; | |
1462 | case ACPI_VIDEO_DISPLAY_LCD: | |
1463 | if (!video_device->flags.lcd) | |
1464 | continue; | |
1465 | break; | |
1466 | } | |
1467 | } else if (video_device->device_id != device_id) { | |
1468 | continue; | |
1469 | } | |
1470 | ||
1471 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1472 | ||
1473 | if (ACPI_FAILURE(status) || !buffer || | |
1474 | buffer->type != ACPI_TYPE_BUFFER) { | |
1475 | length = 128; | |
1476 | status = acpi_video_device_EDID(video_device, &buffer, | |
1477 | length); | |
1478 | if (ACPI_FAILURE(status) || !buffer || | |
1479 | buffer->type != ACPI_TYPE_BUFFER) { | |
1480 | continue; | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | *edid = buffer->buffer.pointer; | |
1485 | return length; | |
1486 | } | |
1487 | ||
1488 | return -ENODEV; | |
1489 | } | |
1490 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1491 | ||
1da177e4 | 1492 | static int |
4be44fcd LB |
1493 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1494 | struct acpi_device *device) | |
1da177e4 | 1495 | { |
fba4e087 | 1496 | int status = 0; |
ff102ea9 | 1497 | struct acpi_device *dev; |
1da177e4 | 1498 | |
fba4e087 IM |
1499 | /* |
1500 | * There are systems where video module known to work fine regardless | |
1501 | * of broken _DOD and ignoring returned value here doesn't cause | |
1502 | * any issues later. | |
1503 | */ | |
1504 | acpi_video_device_enumerate(video); | |
1da177e4 | 1505 | |
ff102ea9 | 1506 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1507 | |
1508 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1509 | if (status) { |
91e13aa3 AL |
1510 | dev_err(&dev->dev, "Can't attach device\n"); |
1511 | break; | |
1da177e4 | 1512 | } |
b4df4636 | 1513 | video->child_count++; |
1da177e4 | 1514 | } |
d550d98d | 1515 | return status; |
1da177e4 LT |
1516 | } |
1517 | ||
1da177e4 LT |
1518 | /* acpi_video interface */ |
1519 | ||
efaa14c7 AL |
1520 | /* |
1521 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1522 | * preform any automatic brightness change on receiving a notification. | |
1523 | */ | |
4be44fcd | 1524 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1525 | { |
efaa14c7 | 1526 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1527 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1528 | } |
1529 | ||
4be44fcd | 1530 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1531 | { |
efaa14c7 | 1532 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1533 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1534 | } |
1535 | ||
7015558f | 1536 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1537 | { |
7015558f | 1538 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1539 | struct input_dev *input; |
17c452f9 | 1540 | int keycode = 0; |
e9dab196 | 1541 | |
67b662e1 | 1542 | if (!video || !video->input) |
d550d98d | 1543 | return; |
1da177e4 | 1544 | |
e9dab196 | 1545 | input = video->input; |
1da177e4 LT |
1546 | |
1547 | switch (event) { | |
98fb8fe1 | 1548 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1549 | * most likely via hotkey. */ |
8a37c65d | 1550 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1551 | break; |
1552 | ||
98fb8fe1 | 1553 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1554 | * connector. */ |
1555 | acpi_video_device_enumerate(video); | |
1556 | acpi_video_device_rebind(video); | |
e9dab196 | 1557 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1558 | break; |
1559 | ||
4be44fcd | 1560 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1561 | keycode = KEY_SWITCHVIDEOMODE; |
1562 | break; | |
4be44fcd | 1563 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1564 | keycode = KEY_VIDEO_NEXT; |
1565 | break; | |
4be44fcd | 1566 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1567 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1568 | break; |
1569 | ||
1570 | default: | |
1571 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1572 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1573 | break; |
1574 | } | |
1575 | ||
8a37c65d LT |
1576 | if (acpi_notifier_call_chain(device, event, 0)) |
1577 | /* Something vetoed the keypress. */ | |
1578 | keycode = 0; | |
17c452f9 | 1579 | |
05bc59a0 | 1580 | if (keycode && (report_key_events & REPORT_OUTPUT_KEY_EVENTS)) { |
17c452f9 MG |
1581 | input_report_key(input, keycode, 1); |
1582 | input_sync(input); | |
1583 | input_report_key(input, keycode, 0); | |
1584 | input_sync(input); | |
1585 | } | |
e9dab196 | 1586 | |
d550d98d | 1587 | return; |
1da177e4 LT |
1588 | } |
1589 | ||
8ab58e8e LT |
1590 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1591 | u32 event) | |
1592 | { | |
1593 | if (!brightness_switch_enabled) | |
1594 | return; | |
1595 | ||
1596 | video_device->switch_brightness_event = event; | |
1597 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1598 | } | |
1599 | ||
4be44fcd | 1600 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1601 | { |
50dd0969 | 1602 | struct acpi_video_device *video_device = data; |
4be44fcd | 1603 | struct acpi_device *device = NULL; |
e9dab196 LY |
1604 | struct acpi_video_bus *bus; |
1605 | struct input_dev *input; | |
17c452f9 | 1606 | int keycode = 0; |
1da177e4 | 1607 | |
1da177e4 | 1608 | if (!video_device) |
d550d98d | 1609 | return; |
1da177e4 | 1610 | |
e6afa0de | 1611 | device = video_device->dev; |
e9dab196 LY |
1612 | bus = video_device->video; |
1613 | input = bus->input; | |
1da177e4 LT |
1614 | |
1615 | switch (event) { | |
4be44fcd | 1616 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1617 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1618 | keycode = KEY_BRIGHTNESS_CYCLE; |
1619 | break; | |
4be44fcd | 1620 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1621 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1622 | keycode = KEY_BRIGHTNESSUP; |
1623 | break; | |
4be44fcd | 1624 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1625 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1626 | keycode = KEY_BRIGHTNESSDOWN; |
1627 | break; | |
70f23fd6 | 1628 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1629 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1630 | keycode = KEY_BRIGHTNESS_ZERO; |
1631 | break; | |
4be44fcd | 1632 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1633 | brightness_switch_event(video_device, event); |
e9dab196 | 1634 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1635 | break; |
1636 | default: | |
1637 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1638 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1639 | break; |
1640 | } | |
e9dab196 | 1641 | |
7761f638 | 1642 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 | 1643 | |
05bc59a0 | 1644 | if (keycode && (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS)) { |
17c452f9 MG |
1645 | input_report_key(input, keycode, 1); |
1646 | input_sync(input); | |
1647 | input_report_key(input, keycode, 0); | |
1648 | input_sync(input); | |
1649 | } | |
e9dab196 | 1650 | |
d550d98d | 1651 | return; |
1da177e4 LT |
1652 | } |
1653 | ||
ac7729da RW |
1654 | static int acpi_video_resume(struct notifier_block *nb, |
1655 | unsigned long val, void *ign) | |
863c1490 MG |
1656 | { |
1657 | struct acpi_video_bus *video; | |
1658 | struct acpi_video_device *video_device; | |
1659 | int i; | |
1660 | ||
ac7729da RW |
1661 | switch (val) { |
1662 | case PM_HIBERNATION_PREPARE: | |
1663 | case PM_SUSPEND_PREPARE: | |
1664 | case PM_RESTORE_PREPARE: | |
1665 | return NOTIFY_DONE; | |
1666 | } | |
863c1490 | 1667 | |
ac7729da RW |
1668 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1669 | ||
1670 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1671 | |
1672 | for (i = 0; i < video->attached_count; i++) { | |
1673 | video_device = video->attached_array[i].bind_info; | |
654a182d HG |
1674 | if (video_device && video_device->brightness) |
1675 | acpi_video_device_lcd_set_level(video_device, | |
1676 | video_device->brightness->curr); | |
863c1490 | 1677 | } |
ac7729da RW |
1678 | |
1679 | return NOTIFY_OK; | |
863c1490 MG |
1680 | } |
1681 | ||
c504f8cb ZR |
1682 | static acpi_status |
1683 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1684 | void **return_value) | |
1685 | { | |
1686 | struct acpi_device *device = context; | |
1687 | struct acpi_device *sibling; | |
1688 | int result; | |
1689 | ||
1690 | if (handle == device->handle) | |
1691 | return AE_CTRL_TERMINATE; | |
1692 | ||
1693 | result = acpi_bus_get_device(handle, &sibling); | |
1694 | if (result) | |
1695 | return AE_OK; | |
1696 | ||
1697 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1698 | return AE_ALREADY_EXISTS; | |
1699 | ||
1700 | return AE_OK; | |
1701 | } | |
1702 | ||
67b662e1 AL |
1703 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1704 | { | |
99678ed7 HG |
1705 | struct backlight_properties props; |
1706 | struct pci_dev *pdev; | |
1707 | acpi_handle acpi_parent; | |
1708 | struct device *parent = NULL; | |
1709 | int result; | |
1710 | static int count; | |
1711 | char *name; | |
67b662e1 | 1712 | |
99678ed7 HG |
1713 | result = acpi_video_init_brightness(device); |
1714 | if (result) | |
1715 | return; | |
654a182d HG |
1716 | |
1717 | if (disable_backlight_sysfs_if > 0) | |
1718 | return; | |
1719 | ||
99678ed7 HG |
1720 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
1721 | if (!name) | |
1722 | return; | |
1723 | count++; | |
67b662e1 | 1724 | |
99678ed7 | 1725 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1726 | |
99678ed7 HG |
1727 | pdev = acpi_get_pci_dev(acpi_parent); |
1728 | if (pdev) { | |
1729 | parent = &pdev->dev; | |
1730 | pci_dev_put(pdev); | |
1731 | } | |
67b662e1 | 1732 | |
99678ed7 HG |
1733 | memset(&props, 0, sizeof(struct backlight_properties)); |
1734 | props.type = BACKLIGHT_FIRMWARE; | |
d485ef43 DF |
1735 | props.max_brightness = |
1736 | device->brightness->count - ACPI_VIDEO_FIRST_LEVEL - 1; | |
99678ed7 HG |
1737 | device->backlight = backlight_device_register(name, |
1738 | parent, | |
1739 | device, | |
1740 | &acpi_backlight_ops, | |
1741 | &props); | |
1742 | kfree(name); | |
654a182d HG |
1743 | if (IS_ERR(device->backlight)) { |
1744 | device->backlight = NULL; | |
99678ed7 | 1745 | return; |
654a182d | 1746 | } |
67b662e1 | 1747 | |
99678ed7 HG |
1748 | /* |
1749 | * Save current brightness level in case we have to restore it | |
1750 | * before acpi_video_device_lcd_set_level() is called next time. | |
1751 | */ | |
1752 | device->backlight->props.brightness = | |
1753 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1754 | |
99678ed7 HG |
1755 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1756 | device->dev, &video_cooling_ops); | |
1757 | if (IS_ERR(device->cooling_dev)) { | |
1758 | /* | |
1759 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1760 | * Also, why the hell we are returning early and not attempt to | |
1761 | * register video output if cooling device registration failed? | |
1762 | * -- dtor | |
1763 | */ | |
1764 | device->cooling_dev = NULL; | |
1765 | return; | |
67b662e1 | 1766 | } |
99678ed7 HG |
1767 | |
1768 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1769 | device->cooling_dev->id); | |
1770 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1771 | &device->cooling_dev->device.kobj, | |
1772 | "thermal_cooling"); | |
1773 | if (result) | |
1774 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1775 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1776 | &device->dev->dev.kobj, "device"); | |
1777 | if (result) | |
1778 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1779 | } |
1780 | ||
dce4ec2e AL |
1781 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1782 | { | |
1783 | struct acpi_video_device *dev; | |
1784 | union acpi_object *levels; | |
1785 | ||
1786 | mutex_lock(&video->device_list_lock); | |
1787 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
9f9cd7ee | 1788 | if (!acpi_video_device_lcd_query_levels(dev->dev->handle, &levels)) |
dce4ec2e AL |
1789 | kfree(levels); |
1790 | } | |
1791 | mutex_unlock(&video->device_list_lock); | |
1792 | } | |
1793 | ||
e50b9be1 AL |
1794 | static bool acpi_video_should_register_backlight(struct acpi_video_device *dev) |
1795 | { | |
1796 | /* | |
1797 | * Do not create backlight device for video output | |
1798 | * device that is not in the enumerated list. | |
1799 | */ | |
1800 | if (!acpi_video_device_in_dod(dev)) { | |
1801 | dev_dbg(&dev->dev->dev, "not in _DOD list, ignore\n"); | |
1802 | return false; | |
1803 | } | |
1804 | ||
1805 | if (only_lcd) | |
1806 | return dev->flags.lcd; | |
1807 | return true; | |
1808 | } | |
1809 | ||
67b662e1 AL |
1810 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1811 | { | |
1812 | struct acpi_video_device *dev; | |
1813 | ||
53a92ba7 HG |
1814 | if (video->backlight_registered) |
1815 | return 0; | |
1816 | ||
dce4ec2e AL |
1817 | acpi_video_run_bcl_for_osi(video); |
1818 | ||
3bd6bce3 | 1819 | if (acpi_video_get_backlight_type() != acpi_backlight_video) |
99678ed7 HG |
1820 | return 0; |
1821 | ||
67b662e1 | 1822 | mutex_lock(&video->device_list_lock); |
e50b9be1 AL |
1823 | list_for_each_entry(dev, &video->video_device_list, entry) { |
1824 | if (acpi_video_should_register_backlight(dev)) | |
1825 | acpi_video_dev_register_backlight(dev); | |
1826 | } | |
67b662e1 AL |
1827 | mutex_unlock(&video->device_list_lock); |
1828 | ||
99678ed7 HG |
1829 | video->backlight_registered = true; |
1830 | ||
67b662e1 AL |
1831 | video->pm_nb.notifier_call = acpi_video_resume; |
1832 | video->pm_nb.priority = 0; | |
1833 | return register_pm_notifier(&video->pm_nb); | |
1834 | } | |
1835 | ||
1836 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1837 | { | |
1838 | if (device->backlight) { | |
1839 | backlight_device_unregister(device->backlight); | |
1840 | device->backlight = NULL; | |
1841 | } | |
1842 | if (device->brightness) { | |
1843 | kfree(device->brightness->levels); | |
1844 | kfree(device->brightness); | |
1845 | device->brightness = NULL; | |
1846 | } | |
1847 | if (device->cooling_dev) { | |
1848 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1849 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1850 | thermal_cooling_device_unregister(device->cooling_dev); | |
1851 | device->cooling_dev = NULL; | |
1852 | } | |
1853 | } | |
1854 | ||
1855 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1856 | { | |
1857 | struct acpi_video_device *dev; | |
99678ed7 HG |
1858 | int error; |
1859 | ||
1860 | if (!video->backlight_registered) | |
1861 | return 0; | |
1862 | ||
1863 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1864 | |
1865 | mutex_lock(&video->device_list_lock); | |
1866 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1867 | acpi_video_dev_unregister_backlight(dev); | |
1868 | mutex_unlock(&video->device_list_lock); | |
1869 | ||
99678ed7 HG |
1870 | video->backlight_registered = false; |
1871 | ||
67b662e1 AL |
1872 | return error; |
1873 | } | |
1874 | ||
1875 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1876 | { | |
1877 | acpi_status status; | |
1878 | struct acpi_device *adev = device->dev; | |
1879 | ||
1880 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1881 | acpi_video_device_notify, device); | |
1882 | if (ACPI_FAILURE(status)) | |
1883 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1884 | else | |
1885 | device->flags.notify = 1; | |
1886 | } | |
1887 | ||
1888 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1889 | { | |
1890 | struct input_dev *input; | |
1891 | struct acpi_video_device *dev; | |
1892 | int error; | |
1893 | ||
1894 | video->input = input = input_allocate_device(); | |
1895 | if (!input) { | |
1896 | error = -ENOMEM; | |
1897 | goto out; | |
1898 | } | |
1899 | ||
1900 | error = acpi_video_bus_start_devices(video); | |
1901 | if (error) | |
1902 | goto err_free_input; | |
1903 | ||
1904 | snprintf(video->phys, sizeof(video->phys), | |
1905 | "%s/video/input0", acpi_device_hid(video->device)); | |
1906 | ||
1907 | input->name = acpi_device_name(video->device); | |
1908 | input->phys = video->phys; | |
1909 | input->id.bustype = BUS_HOST; | |
1910 | input->id.product = 0x06; | |
1911 | input->dev.parent = &video->device->dev; | |
1912 | input->evbit[0] = BIT(EV_KEY); | |
1913 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1914 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1915 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1916 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1917 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1918 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1919 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1920 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1921 | ||
1922 | error = input_register_device(input); | |
1923 | if (error) | |
1924 | goto err_stop_dev; | |
1925 | ||
1926 | mutex_lock(&video->device_list_lock); | |
1927 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1928 | acpi_video_dev_add_notify_handler(dev); | |
1929 | mutex_unlock(&video->device_list_lock); | |
1930 | ||
1931 | return 0; | |
1932 | ||
1933 | err_stop_dev: | |
1934 | acpi_video_bus_stop_devices(video); | |
1935 | err_free_input: | |
1936 | input_free_device(input); | |
1937 | video->input = NULL; | |
1938 | out: | |
1939 | return error; | |
1940 | } | |
1941 | ||
1942 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1943 | { | |
1944 | if (dev->flags.notify) { | |
1945 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1946 | acpi_video_device_notify); | |
1947 | dev->flags.notify = 0; | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1952 | { | |
1953 | struct acpi_video_device *dev; | |
1954 | ||
1955 | mutex_lock(&video->device_list_lock); | |
1956 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1957 | acpi_video_dev_remove_notify_handler(dev); | |
1958 | mutex_unlock(&video->device_list_lock); | |
1959 | ||
1960 | acpi_video_bus_stop_devices(video); | |
1961 | input_unregister_device(video->input); | |
1962 | video->input = NULL; | |
1963 | } | |
1964 | ||
1965 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1966 | { | |
1967 | struct acpi_video_device *dev, *next; | |
1968 | ||
1969 | mutex_lock(&video->device_list_lock); | |
1970 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1971 | list_del(&dev->entry); | |
1972 | kfree(dev); | |
1973 | } | |
1974 | mutex_unlock(&video->device_list_lock); | |
1975 | ||
1976 | return 0; | |
1977 | } | |
1978 | ||
ac7729da RW |
1979 | static int instance; |
1980 | ||
4be44fcd | 1981 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1982 | { |
f51e8391 | 1983 | struct acpi_video_bus *video; |
f51e8391 | 1984 | int error; |
c504f8cb ZR |
1985 | acpi_status status; |
1986 | ||
1987 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1988 | device->parent->handle, 1, | |
1989 | acpi_video_bus_match, NULL, | |
1990 | device, NULL); | |
1991 | if (status == AE_ALREADY_EXISTS) { | |
1992 | printk(KERN_WARNING FW_BUG | |
1993 | "Duplicate ACPI video bus devices for the" | |
1994 | " same VGA controller, please try module " | |
1995 | "parameter \"video.allow_duplicates=1\"" | |
1996 | "if the current driver doesn't work.\n"); | |
1997 | if (!allow_duplicates) | |
1998 | return -ENODEV; | |
1999 | } | |
1da177e4 | 2000 | |
36bcbec7 | 2001 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 2002 | if (!video) |
d550d98d | 2003 | return -ENOMEM; |
1da177e4 | 2004 | |
e6d9da1d ZR |
2005 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
2006 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
2007 | if (instance) | |
2008 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 2009 | instance++; |
e6d9da1d | 2010 | } |
f3b39f13 ZY |
2011 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
2012 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
2013 | if (instance) | |
2014 | device->pnp.bus_id[3] = '0' + instance; | |
2015 | instance++; | |
2016 | } | |
e6d9da1d | 2017 | |
e6afa0de | 2018 | video->device = device; |
1da177e4 LT |
2019 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
2020 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 2021 | device->driver_data = video; |
1da177e4 LT |
2022 | |
2023 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
2024 | error = acpi_video_bus_check(video); |
2025 | if (error) | |
2026 | goto err_free_video; | |
1da177e4 | 2027 | |
bbac81f5 | 2028 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
2029 | INIT_LIST_HEAD(&video->video_device_list); |
2030 | ||
ea9f8856 IM |
2031 | error = acpi_video_bus_get_devices(video, device); |
2032 | if (error) | |
91e13aa3 | 2033 | goto err_put_video; |
1da177e4 | 2034 | |
1da177e4 | 2035 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
2036 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
2037 | video->flags.multihead ? "yes" : "no", | |
2038 | video->flags.rom ? "yes" : "no", | |
2039 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
2040 | mutex_lock(&video_list_lock); |
2041 | list_add_tail(&video->entry, &video_bus_head); | |
2042 | mutex_unlock(&video_list_lock); | |
1da177e4 | 2043 | |
67b662e1 AL |
2044 | acpi_video_bus_register_backlight(video); |
2045 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 2046 | |
f51e8391 DT |
2047 | return 0; |
2048 | ||
67b662e1 | 2049 | err_put_video: |
f51e8391 DT |
2050 | acpi_video_bus_put_devices(video); |
2051 | kfree(video->attached_array); | |
67b662e1 | 2052 | err_free_video: |
f51e8391 | 2053 | kfree(video); |
db89b4f0 | 2054 | device->driver_data = NULL; |
1da177e4 | 2055 | |
f51e8391 | 2056 | return error; |
1da177e4 LT |
2057 | } |
2058 | ||
51fac838 | 2059 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 2060 | { |
4be44fcd | 2061 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2062 | |
1da177e4 LT |
2063 | |
2064 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2065 | return -EINVAL; |
1da177e4 | 2066 | |
50dd0969 | 2067 | video = acpi_driver_data(device); |
1da177e4 | 2068 | |
67b662e1 AL |
2069 | acpi_video_bus_remove_notify_handler(video); |
2070 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 2071 | acpi_video_bus_put_devices(video); |
1da177e4 | 2072 | |
67b662e1 AL |
2073 | mutex_lock(&video_list_lock); |
2074 | list_del(&video->entry); | |
2075 | mutex_unlock(&video_list_lock); | |
2076 | ||
6044ec88 | 2077 | kfree(video->attached_array); |
1da177e4 LT |
2078 | kfree(video); |
2079 | ||
d550d98d | 2080 | return 0; |
1da177e4 LT |
2081 | } |
2082 | ||
c6996bdd AC |
2083 | static int __init is_i740(struct pci_dev *dev) |
2084 | { | |
2085 | if (dev->device == 0x00D1) | |
2086 | return 1; | |
2087 | if (dev->device == 0x7000) | |
2088 | return 1; | |
2089 | return 0; | |
2090 | } | |
2091 | ||
74a365b3 MG |
2092 | static int __init intel_opregion_present(void) |
2093 | { | |
c6996bdd | 2094 | int opregion = 0; |
74a365b3 MG |
2095 | struct pci_dev *dev = NULL; |
2096 | u32 address; | |
2097 | ||
2098 | for_each_pci_dev(dev) { | |
2099 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2100 | continue; | |
2101 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2102 | continue; | |
c6996bdd AC |
2103 | /* We don't want to poke around undefined i740 registers */ |
2104 | if (is_i740(dev)) | |
2105 | continue; | |
74a365b3 MG |
2106 | pci_read_config_dword(dev, 0xfc, &address); |
2107 | if (!address) | |
2108 | continue; | |
c6996bdd | 2109 | opregion = 1; |
74a365b3 | 2110 | } |
c6996bdd | 2111 | return opregion; |
74a365b3 MG |
2112 | } |
2113 | ||
cecf3e3e | 2114 | /* Check if the chassis-type indicates there is no builtin LCD panel */ |
53fa1f6e HG |
2115 | static bool dmi_is_desktop(void) |
2116 | { | |
2117 | const char *chassis_type; | |
cecf3e3e | 2118 | unsigned long type; |
53fa1f6e HG |
2119 | |
2120 | chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE); | |
2121 | if (!chassis_type) | |
2122 | return false; | |
2123 | ||
cecf3e3e HG |
2124 | if (kstrtoul(chassis_type, 10, &type) != 0) |
2125 | return false; | |
2126 | ||
2127 | switch (type) { | |
2128 | case 0x03: /* Desktop */ | |
2129 | case 0x04: /* Low Profile Desktop */ | |
2130 | case 0x05: /* Pizza Box */ | |
2131 | case 0x06: /* Mini Tower */ | |
2132 | case 0x07: /* Tower */ | |
d693c008 | 2133 | case 0x10: /* Lunch Box */ |
cecf3e3e | 2134 | case 0x11: /* Main Server Chassis */ |
53fa1f6e | 2135 | return true; |
cecf3e3e | 2136 | } |
53fa1f6e HG |
2137 | |
2138 | return false; | |
2139 | } | |
2140 | ||
8e5c2b77 | 2141 | int acpi_video_register(void) |
1da177e4 | 2142 | { |
2a8b18e9 | 2143 | int ret = 0; |
28d63403 | 2144 | |
970530cd HG |
2145 | mutex_lock(®ister_count_mutex); |
2146 | if (register_count) { | |
86e437f0 | 2147 | /* |
8e5c2b77 RW |
2148 | * if the function of acpi_video_register is already called, |
2149 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 | 2150 | */ |
2a8b18e9 | 2151 | goto leave; |
86e437f0 | 2152 | } |
1da177e4 | 2153 | |
5928c281 HG |
2154 | /* |
2155 | * We're seeing a lot of bogus backlight interfaces on newer machines | |
2156 | * without a LCD such as desktops, servers and HDMI sticks. Checking | |
2157 | * the lcd flag fixes this, so enable this on any machines which are | |
2158 | * win8 ready (where we also prefer the native backlight driver, so | |
2159 | * normally the acpi_video code should not register there anyways). | |
2160 | */ | |
53fa1f6e HG |
2161 | if (only_lcd == -1) { |
2162 | if (dmi_is_desktop() && acpi_osi_is_win8()) | |
2163 | only_lcd = true; | |
2164 | else | |
2165 | only_lcd = false; | |
2166 | } | |
5928c281 | 2167 | |
7ee33baa HG |
2168 | dmi_check_system(video_dmi_table); |
2169 | ||
28d63403 CW |
2170 | ret = acpi_bus_register_driver(&acpi_video_bus); |
2171 | if (ret) | |
2a8b18e9 | 2172 | goto leave; |
1da177e4 | 2173 | |
86e437f0 ZY |
2174 | /* |
2175 | * When the acpi_video_bus is loaded successfully, increase | |
2176 | * the counter reference. | |
2177 | */ | |
970530cd | 2178 | register_count = 1; |
86e437f0 | 2179 | |
2a8b18e9 | 2180 | leave: |
970530cd | 2181 | mutex_unlock(®ister_count_mutex); |
2a8b18e9 | 2182 | return ret; |
1da177e4 | 2183 | } |
8e5c2b77 | 2184 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2185 | |
86e437f0 ZY |
2186 | void acpi_video_unregister(void) |
2187 | { | |
970530cd HG |
2188 | mutex_lock(®ister_count_mutex); |
2189 | if (register_count) { | |
2a8b18e9 | 2190 | acpi_bus_unregister_driver(&acpi_video_bus); |
970530cd | 2191 | register_count = 0; |
86e437f0 | 2192 | } |
970530cd | 2193 | mutex_unlock(®ister_count_mutex); |
86e437f0 ZY |
2194 | } |
2195 | EXPORT_SYMBOL(acpi_video_unregister); | |
2196 | ||
1b7f37e1 HG |
2197 | void acpi_video_unregister_backlight(void) |
2198 | { | |
2199 | struct acpi_video_bus *video; | |
2200 | ||
970530cd HG |
2201 | mutex_lock(®ister_count_mutex); |
2202 | if (register_count) { | |
2a8b18e9 HG |
2203 | mutex_lock(&video_list_lock); |
2204 | list_for_each_entry(video, &video_bus_head, entry) | |
2205 | acpi_video_bus_unregister_backlight(video); | |
2206 | mutex_unlock(&video_list_lock); | |
2207 | } | |
970530cd | 2208 | mutex_unlock(®ister_count_mutex); |
1b7f37e1 | 2209 | } |
1b7f37e1 | 2210 | |
90b066b1 HG |
2211 | bool acpi_video_handles_brightness_key_presses(void) |
2212 | { | |
2213 | bool have_video_busses; | |
2214 | ||
2215 | mutex_lock(&video_list_lock); | |
2216 | have_video_busses = !list_empty(&video_bus_head); | |
2217 | mutex_unlock(&video_list_lock); | |
2218 | ||
05bc59a0 HG |
2219 | return have_video_busses && |
2220 | (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS); | |
90b066b1 HG |
2221 | } |
2222 | EXPORT_SYMBOL(acpi_video_handles_brightness_key_presses); | |
2223 | ||
74a365b3 MG |
2224 | /* |
2225 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2226 | * the video opregion code to be run first in order to initialise | |
2227 | * state before any ACPI video calls are made. To handle this we defer | |
2228 | * registration of the video class until the opregion code has run. | |
2229 | */ | |
2230 | ||
2231 | static int __init acpi_video_init(void) | |
2232 | { | |
6e17cb12 CW |
2233 | /* |
2234 | * Let the module load even if ACPI is disabled (e.g. due to | |
2235 | * a broken BIOS) so that i915.ko can still be loaded on such | |
2236 | * old systems without an AcpiOpRegion. | |
2237 | * | |
2238 | * acpi_video_register() will report -ENODEV later as well due | |
2239 | * to acpi_disabled when i915.ko tries to register itself afterwards. | |
2240 | */ | |
2241 | if (acpi_disabled) | |
2242 | return 0; | |
2243 | ||
74a365b3 MG |
2244 | if (intel_opregion_present()) |
2245 | return 0; | |
2246 | ||
2247 | return acpi_video_register(); | |
2248 | } | |
1da177e4 | 2249 | |
86e437f0 | 2250 | static void __exit acpi_video_exit(void) |
1da177e4 | 2251 | { |
93a291df | 2252 | acpi_video_detect_exit(); |
86e437f0 | 2253 | acpi_video_unregister(); |
1da177e4 | 2254 | |
d550d98d | 2255 | return; |
1da177e4 LT |
2256 | } |
2257 | ||
2258 | module_init(acpi_video_init); | |
2259 | module_exit(acpi_video_exit); |