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 | ||
2924d2f8 RW |
10 | #define pr_fmt(fmt) "ACPI: video: " fmt |
11 | ||
1da177e4 LT |
12 | #include <linux/kernel.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/list.h> | |
bbac81f5 | 17 | #include <linux/mutex.h> |
e9dab196 | 18 | #include <linux/input.h> |
2f3d000a | 19 | #include <linux/backlight.h> |
702ed512 | 20 | #include <linux/thermal.h> |
935e5f29 | 21 | #include <linux/sort.h> |
74a365b3 MG |
22 | #include <linux/pci.h> |
23 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
eb27cae8 | 25 | #include <linux/dmi.h> |
ac7729da | 26 | #include <linux/suspend.h> |
8b48463f | 27 | #include <linux/acpi.h> |
e92a7162 | 28 | #include <acpi/video.h> |
7c0f6ba6 | 29 | #include <linux/uaccess.h> |
1da177e4 | 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 | |
f52fd66d | 36 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 37 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
38 | MODULE_LICENSE("GPL"); |
39 | ||
97e45dd6 | 40 | static bool brightness_switch_enabled = true; |
8a681a4d ZR |
41 | module_param(brightness_switch_enabled, bool, 0644); |
42 | ||
c504f8cb ZR |
43 | /* |
44 | * By default, we don't allow duplicate ACPI video bus devices | |
45 | * under the same VGA controller | |
46 | */ | |
90ab5ee9 | 47 | static bool allow_duplicates; |
c504f8cb ZR |
48 | module_param(allow_duplicates, bool, 0644); |
49 | ||
05bc59a0 HG |
50 | #define REPORT_OUTPUT_KEY_EVENTS 0x01 |
51 | #define REPORT_BRIGHTNESS_KEY_EVENTS 0x02 | |
52 | static int report_key_events = -1; | |
53 | module_param(report_key_events, int, 0644); | |
54 | MODULE_PARM_DESC(report_key_events, | |
55 | "0: none, 1: output changes, 2: brightness changes, 3: all"); | |
56 | ||
4f7f9645 HG |
57 | static int hw_changes_brightness = -1; |
58 | module_param(hw_changes_brightness, int, 0644); | |
59 | MODULE_PARM_DESC(hw_changes_brightness, | |
60 | "Set this to 1 on buggy hw which changes the brightness itself when " | |
61 | "a hotkey is pressed: -1: auto, 0: normal 1: hw-changes-brightness"); | |
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 | |
5ad26161 | 73 | static bool may_report_brightness_keys; |
970530cd HG |
74 | static int register_count; |
75 | static DEFINE_MUTEX(register_count_mutex); | |
14e93553 HG |
76 | static DEFINE_MUTEX(video_list_lock); |
77 | static LIST_HEAD(video_bus_head); | |
4be44fcd | 78 | static int acpi_video_bus_add(struct acpi_device *device); |
6c0eb5ba | 79 | static void acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 80 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
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); |
2924d2f8 | 323 | if (ACPI_FAILURE(status)) |
d550d98d | 324 | return status; |
4be44fcd | 325 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 326 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
2924d2f8 | 327 | acpi_handle_info(handle, "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 | 350 | if (ACPI_FAILURE(status)) { |
2924d2f8 | 351 | acpi_handle_info(device->dev->handle, "_BCM evaluation failed\n"); |
24450c7a ZR |
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 | |
2924d2f8 | 365 | acpi_handle_info(device->dev->handle, "Current brightness invalid\n"); |
24450c7a | 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 | ||
e50b9be1 AL |
381 | static int video_set_device_id_scheme(const struct dmi_system_id *d) |
382 | { | |
383 | device_id_scheme = true; | |
384 | return 0; | |
385 | } | |
386 | ||
387 | static int video_enable_only_lcd(const struct dmi_system_id *d) | |
388 | { | |
389 | only_lcd = true; | |
390 | return 0; | |
391 | } | |
392 | ||
4b4b3b20 HG |
393 | static int video_set_report_key_events(const struct dmi_system_id *id) |
394 | { | |
395 | if (report_key_events == -1) | |
396 | report_key_events = (uintptr_t)id->driver_data; | |
397 | return 0; | |
398 | } | |
399 | ||
4f7f9645 HG |
400 | static int video_hw_changes_brightness( |
401 | const struct dmi_system_id *d) | |
402 | { | |
403 | if (hw_changes_brightness == -1) | |
404 | hw_changes_brightness = 1; | |
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 | |
e50b9be1 AL |
453 | /* |
454 | * Some machine's _DOD IDs don't have bit 31(Device ID Scheme) set | |
455 | * but the IDs actually follow the Device ID Scheme. | |
456 | */ | |
457 | { | |
458 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
459 | .callback = video_set_device_id_scheme, | |
460 | .ident = "ESPRIMO Mobile M9410", | |
461 | .matches = { | |
462 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
463 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"), | |
464 | }, | |
465 | }, | |
466 | /* | |
467 | * Some machines have multiple video output devices, but only the one | |
468 | * that is the type of LCD can do the backlight control so we should not | |
469 | * register backlight interface for other video output devices. | |
470 | */ | |
471 | { | |
472 | /* https://bugzilla.kernel.org/show_bug.cgi?id=104121 */ | |
473 | .callback = video_enable_only_lcd, | |
474 | .ident = "ESPRIMO Mobile M9410", | |
475 | .matches = { | |
476 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
477 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"), | |
478 | }, | |
479 | }, | |
4b4b3b20 HG |
480 | /* |
481 | * Some machines report wrong key events on the acpi-bus, suppress | |
482 | * key event reporting on these. Note this is only intended to work | |
483 | * around events which are plain wrong. In some cases we get double | |
484 | * events, in this case acpi-video is considered the canonical source | |
485 | * and the events from the other source should be filtered. E.g. | |
486 | * by calling acpi_video_handles_brightness_key_presses() from the | |
487 | * vendor acpi/wmi driver or by using /lib/udev/hwdb.d/60-keyboard.hwdb | |
488 | */ | |
489 | { | |
490 | .callback = video_set_report_key_events, | |
491 | .driver_data = (void *)((uintptr_t)REPORT_OUTPUT_KEY_EVENTS), | |
492 | .ident = "Dell Vostro V131", | |
493 | .matches = { | |
494 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
495 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), | |
496 | }, | |
497 | }, | |
9249c32e HG |
498 | { |
499 | .callback = video_set_report_key_events, | |
500 | .driver_data = (void *)((uintptr_t)REPORT_BRIGHTNESS_KEY_EVENTS), | |
501 | .ident = "Dell Vostro 3350", | |
502 | .matches = { | |
503 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
504 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"), | |
505 | }, | |
506 | }, | |
4f7f9645 HG |
507 | /* |
508 | * Some machines change the brightness themselves when a brightness | |
509 | * hotkey gets pressed, despite us telling them not to. In this case | |
510 | * acpi_video_device_notify() should only call backlight_force_update( | |
511 | * BACKLIGHT_UPDATE_HOTKEY) and not do anything else. | |
512 | */ | |
513 | { | |
514 | /* https://bugzilla.kernel.org/show_bug.cgi?id=204077 */ | |
515 | .callback = video_hw_changes_brightness, | |
516 | .ident = "Packard Bell EasyNote MZ35", | |
517 | .matches = { | |
518 | DMI_MATCH(DMI_SYS_VENDOR, "Packard Bell"), | |
519 | DMI_MATCH(DMI_PRODUCT_NAME, "EasyNote MZ35"), | |
520 | }, | |
521 | }, | |
45cb50e6 ZR |
522 | {} |
523 | }; | |
524 | ||
994fa63c DB |
525 | static unsigned long long |
526 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
527 | unsigned long long bqc_value) | |
528 | { | |
529 | unsigned long long level; | |
530 | ||
531 | if (device->brightness->flags._BQC_use_index) { | |
532 | /* | |
d485ef43 DF |
533 | * _BQC returns an index that doesn't account for the first 2 |
534 | * items with special meaning (see enum acpi_video_level_idx), | |
535 | * so we need to compensate for that by offsetting ourselves | |
994fa63c DB |
536 | */ |
537 | if (device->brightness->flags._BCL_reversed) | |
d485ef43 DF |
538 | bqc_value = device->brightness->count - |
539 | ACPI_VIDEO_FIRST_LEVEL - 1 - bqc_value; | |
994fa63c | 540 | |
d485ef43 | 541 | level = device->brightness->levels[bqc_value + |
c6237b21 | 542 | ACPI_VIDEO_FIRST_LEVEL]; |
994fa63c DB |
543 | } else { |
544 | level = bqc_value; | |
545 | } | |
546 | ||
547 | level += bqc_offset_aml_bug_workaround; | |
548 | ||
549 | return level; | |
550 | } | |
551 | ||
1da177e4 | 552 | static int |
4be44fcd | 553 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 554 | unsigned long long *level, bool raw) |
1da177e4 | 555 | { |
c8890f90 | 556 | acpi_status status = AE_OK; |
4e231fa4 | 557 | int i; |
c8890f90 | 558 | |
c60d638e ZR |
559 | if (device->cap._BQC || device->cap._BCQ) { |
560 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
561 | ||
562 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
563 | NULL, level); |
564 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
565 | if (raw) { |
566 | /* | |
567 | * Caller has indicated he wants the raw | |
568 | * value returned by _BQC, so don't furtherly | |
569 | * mess with the value. | |
570 | */ | |
571 | return 0; | |
572 | } | |
573 | ||
994fa63c | 574 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 575 | |
d485ef43 DF |
576 | for (i = ACPI_VIDEO_FIRST_LEVEL; |
577 | i < device->brightness->count; i++) | |
4e231fa4 VS |
578 | if (device->brightness->levels[i] == *level) { |
579 | device->brightness->curr = *level; | |
580 | return 0; | |
915ea7e4 | 581 | } |
a89803df DB |
582 | /* |
583 | * BQC returned an invalid level. | |
584 | * Stop using it. | |
585 | */ | |
2924d2f8 RW |
586 | acpi_handle_info(device->dev->handle, |
587 | "%s returned an invalid level", buf); | |
a89803df | 588 | device->cap._BQC = device->cap._BCQ = 0; |
c8890f90 | 589 | } else { |
21fcb34e FC |
590 | /* |
591 | * Fixme: | |
c8890f90 ZR |
592 | * should we return an error or ignore this failure? |
593 | * dev->brightness->curr is a cached value which stores | |
594 | * the correct current backlight level in most cases. | |
595 | * ACPI video backlight still works w/ buggy _BQC. | |
596 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
597 | */ | |
2924d2f8 RW |
598 | acpi_handle_info(device->dev->handle, |
599 | "%s evaluation failed", buf); | |
c60d638e | 600 | device->cap._BQC = device->cap._BCQ = 0; |
c8890f90 ZR |
601 | } |
602 | } | |
603 | ||
4500ca8e | 604 | *level = device->brightness->curr; |
c8890f90 | 605 | return 0; |
1da177e4 LT |
606 | } |
607 | ||
608 | static int | |
4be44fcd LB |
609 | acpi_video_device_EDID(struct acpi_video_device *device, |
610 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 611 | { |
4be44fcd LB |
612 | int status; |
613 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
614 | union acpi_object *obj; | |
615 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
616 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 617 | |
1da177e4 LT |
618 | |
619 | *edid = NULL; | |
620 | ||
621 | if (!device) | |
d550d98d | 622 | return -ENODEV; |
1da177e4 LT |
623 | if (length == 128) |
624 | arg0.integer.value = 1; | |
625 | else if (length == 256) | |
626 | arg0.integer.value = 2; | |
627 | else | |
d550d98d | 628 | return -EINVAL; |
1da177e4 | 629 | |
90130268 | 630 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 631 | if (ACPI_FAILURE(status)) |
d550d98d | 632 | return -ENODEV; |
1da177e4 | 633 | |
50dd0969 | 634 | obj = buffer.pointer; |
1da177e4 LT |
635 | |
636 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
637 | *edid = obj; | |
638 | else { | |
2924d2f8 | 639 | acpi_handle_info(device->dev->handle, "Invalid _DDC data\n"); |
1da177e4 LT |
640 | status = -EFAULT; |
641 | kfree(obj); | |
642 | } | |
643 | ||
d550d98d | 644 | return status; |
1da177e4 LT |
645 | } |
646 | ||
1da177e4 LT |
647 | /* bus */ |
648 | ||
1da177e4 LT |
649 | /* |
650 | * Arg: | |
21fcb34e FC |
651 | * video : video bus device pointer |
652 | * bios_flag : | |
1da177e4 LT |
653 | * 0. The system BIOS should NOT automatically switch(toggle) |
654 | * the active display output. | |
655 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 656 | * active display output. No switch event. |
1da177e4 LT |
657 | * 2. The _DGS value should be locked. |
658 | * 3. The system BIOS should not automatically switch (toggle) the | |
659 | * active display output, but instead generate the display switch | |
660 | * event notify code. | |
661 | * lcd_flag : | |
662 | * 0. The system BIOS should automatically control the brightness level | |
b5b42b24 KP |
663 | * of the LCD when: |
664 | * - the power changes from AC to DC (ACPI appendix B) | |
665 | * - a brightness hotkey gets pressed (implied by Win7/8 backlight docs) | |
21fcb34e | 666 | * 1. The system BIOS should NOT automatically control the brightness |
b5b42b24 KP |
667 | * level of the LCD when: |
668 | * - the power changes from AC to DC (ACPI appendix B) | |
669 | * - a brightness hotkey gets pressed (implied by Win7/8 backlight docs) | |
21fcb34e | 670 | * Return Value: |
ea9f8856 | 671 | * -EINVAL wrong arg. |
1da177e4 LT |
672 | */ |
673 | ||
674 | static int | |
4be44fcd | 675 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 676 | { |
ea9f8856 | 677 | acpi_status status; |
1da177e4 | 678 | |
b0373843 ZR |
679 | if (!video->cap._DOS) |
680 | return 0; | |
1da177e4 | 681 | |
ea9f8856 IM |
682 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
683 | return -EINVAL; | |
0db98202 JL |
684 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
685 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
686 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
687 | if (ACPI_FAILURE(status)) |
688 | return -EIO; | |
1da177e4 | 689 | |
ea9f8856 | 690 | return 0; |
1da177e4 LT |
691 | } |
692 | ||
935e5f29 ZR |
693 | /* |
694 | * Simple comparison function used to sort backlight levels. | |
695 | */ | |
696 | ||
697 | static int | |
698 | acpi_video_cmp_level(const void *a, const void *b) | |
699 | { | |
700 | return *(int *)a - *(int *)b; | |
701 | } | |
702 | ||
a50188da AL |
703 | /* |
704 | * Decides if _BQC/_BCQ for this system is usable | |
705 | * | |
706 | * We do this by changing the level first and then read out the current | |
707 | * brightness level, if the value does not match, find out if it is using | |
708 | * index. If not, clear the _BQC/_BCQ capability. | |
709 | */ | |
710 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
711 | int max_level, int current_level) | |
712 | { | |
713 | struct acpi_video_device_brightness *br = device->brightness; | |
714 | int result; | |
715 | unsigned long long level; | |
716 | int test_level; | |
717 | ||
718 | /* don't mess with existing known broken systems */ | |
719 | if (bqc_offset_aml_bug_workaround) | |
720 | return 0; | |
721 | ||
722 | /* | |
723 | * Some systems always report current brightness level as maximum | |
592c8095 DF |
724 | * through _BQC, we need to test another value for them. However, |
725 | * there is a subtlety: | |
726 | * | |
727 | * If the _BCL package ordering is descending, the first level | |
728 | * (br->levels[2]) is likely to be 0, and if the number of levels | |
729 | * matches the number of steps, we might confuse a returned level to | |
730 | * mean the index. | |
731 | * | |
732 | * For example: | |
733 | * | |
734 | * current_level = max_level = 100 | |
735 | * test_level = 0 | |
736 | * returned level = 100 | |
737 | * | |
738 | * In this case 100 means the level, not the index, and _BCM failed. | |
739 | * Still, if the _BCL package ordering is descending, the index of | |
740 | * level 0 is also 100, so we assume _BQC is indexed, when it's not. | |
741 | * | |
742 | * This causes all _BQC calls to return bogus values causing weird | |
743 | * behavior from the user's perspective. For example: | |
744 | * | |
745 | * xbacklight -set 10; xbacklight -set 20; | |
746 | * | |
747 | * would flash to 90% and then slowly down to the desired level (20). | |
748 | * | |
749 | * The solution is simple; test anything other than the first level | |
750 | * (e.g. 1). | |
a50188da | 751 | */ |
d485ef43 DF |
752 | test_level = current_level == max_level |
753 | ? br->levels[ACPI_VIDEO_FIRST_LEVEL + 1] | |
754 | : max_level; | |
a50188da AL |
755 | |
756 | result = acpi_video_device_lcd_set_level(device, test_level); | |
757 | if (result) | |
758 | return result; | |
759 | ||
760 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
761 | if (result) | |
762 | return result; | |
763 | ||
764 | if (level != test_level) { | |
765 | /* buggy _BQC found, need to find out if it uses index */ | |
766 | if (level < br->count) { | |
767 | if (br->flags._BCL_reversed) | |
d485ef43 DF |
768 | level = br->count - ACPI_VIDEO_FIRST_LEVEL - 1 - level; |
769 | if (br->levels[level + ACPI_VIDEO_FIRST_LEVEL] == test_level) | |
a50188da AL |
770 | br->flags._BQC_use_index = 1; |
771 | } | |
772 | ||
773 | if (!br->flags._BQC_use_index) | |
774 | device->cap._BQC = device->cap._BCQ = 0; | |
775 | } | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
05950094 | 780 | int acpi_video_get_levels(struct acpi_device *device, |
9f9cd7ee AL |
781 | struct acpi_video_device_brightness **dev_br, |
782 | int *pmax_level) | |
469778c1 JJ |
783 | { |
784 | union acpi_object *obj = NULL; | |
d32f6947 | 785 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
469778c1 JJ |
786 | union acpi_object *o; |
787 | struct acpi_video_device_brightness *br = NULL; | |
05950094 | 788 | int result = 0; |
bd8ba205 | 789 | u32 value; |
469778c1 | 790 | |
2924d2f8 RW |
791 | if (ACPI_FAILURE(acpi_video_device_lcd_query_levels(device->handle, &obj))) { |
792 | acpi_handle_debug(device->handle, | |
793 | "Could not query available LCD brightness level\n"); | |
05950094 | 794 | result = -ENODEV; |
469778c1 JJ |
795 | goto out; |
796 | } | |
797 | ||
d485ef43 | 798 | if (obj->package.count < ACPI_VIDEO_FIRST_LEVEL) { |
05950094 | 799 | result = -EINVAL; |
469778c1 | 800 | goto out; |
05950094 | 801 | } |
469778c1 JJ |
802 | |
803 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
804 | if (!br) { | |
1a7c618a | 805 | result = -ENOMEM; |
469778c1 JJ |
806 | goto out; |
807 | } | |
808 | ||
592c8095 DF |
809 | /* |
810 | * Note that we have to reserve 2 extra items (ACPI_VIDEO_FIRST_LEVEL), | |
811 | * in order to account for buggy BIOS which don't export the first two | |
812 | * special levels (see below) | |
813 | */ | |
6da2ec56 KC |
814 | br->levels = kmalloc_array(obj->package.count + ACPI_VIDEO_FIRST_LEVEL, |
815 | sizeof(*br->levels), | |
816 | GFP_KERNEL); | |
1a7c618a ZR |
817 | if (!br->levels) { |
818 | result = -ENOMEM; | |
469778c1 | 819 | goto out_free; |
1a7c618a | 820 | } |
469778c1 JJ |
821 | |
822 | for (i = 0; i < obj->package.count; i++) { | |
823 | o = (union acpi_object *)&obj->package.elements[i]; | |
824 | if (o->type != ACPI_TYPE_INTEGER) { | |
2924d2f8 | 825 | acpi_handle_info(device->handle, "Invalid data\n"); |
469778c1 JJ |
826 | continue; |
827 | } | |
bd8ba205 HG |
828 | value = (u32) o->integer.value; |
829 | /* Skip duplicate entries */ | |
d485ef43 DF |
830 | if (count > ACPI_VIDEO_FIRST_LEVEL |
831 | && br->levels[count - 1] == value) | |
bd8ba205 HG |
832 | continue; |
833 | ||
834 | br->levels[count] = value; | |
469778c1 JJ |
835 | |
836 | if (br->levels[count] > max_level) | |
837 | max_level = br->levels[count]; | |
838 | count++; | |
839 | } | |
840 | ||
d32f6947 ZR |
841 | /* |
842 | * some buggy BIOS don't export the levels | |
843 | * when machine is on AC/Battery in _BCL package. | |
844 | * In this case, the first two elements in _BCL packages | |
845 | * are also supported brightness levels that OS should take care of. | |
846 | */ | |
d485ef43 DF |
847 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < count; i++) { |
848 | if (br->levels[i] == br->levels[ACPI_VIDEO_AC_LEVEL]) | |
d32f6947 | 849 | level_ac_battery++; |
d485ef43 | 850 | if (br->levels[i] == br->levels[ACPI_VIDEO_BATTERY_LEVEL]) |
90af2cf6 ZR |
851 | level_ac_battery++; |
852 | } | |
d32f6947 | 853 | |
d485ef43 DF |
854 | if (level_ac_battery < ACPI_VIDEO_FIRST_LEVEL) { |
855 | level_ac_battery = ACPI_VIDEO_FIRST_LEVEL - level_ac_battery; | |
d32f6947 | 856 | br->flags._BCL_no_ac_battery_levels = 1; |
d485ef43 DF |
857 | for (i = (count - 1 + level_ac_battery); |
858 | i >= ACPI_VIDEO_FIRST_LEVEL; i--) | |
d32f6947 ZR |
859 | br->levels[i] = br->levels[i - level_ac_battery]; |
860 | count += level_ac_battery; | |
d485ef43 | 861 | } else if (level_ac_battery > ACPI_VIDEO_FIRST_LEVEL) |
2924d2f8 RW |
862 | acpi_handle_info(device->handle, |
863 | "Too many duplicates in _BCL package"); | |
d32f6947 | 864 | |
d80fb99f | 865 | /* Check if the _BCL package is in a reversed order */ |
d485ef43 | 866 | if (max_level == br->levels[ACPI_VIDEO_FIRST_LEVEL]) { |
d80fb99f | 867 | br->flags._BCL_reversed = 1; |
d485ef43 DF |
868 | sort(&br->levels[ACPI_VIDEO_FIRST_LEVEL], |
869 | count - ACPI_VIDEO_FIRST_LEVEL, | |
870 | sizeof(br->levels[ACPI_VIDEO_FIRST_LEVEL]), | |
871 | acpi_video_cmp_level, NULL); | |
d80fb99f | 872 | } else if (max_level != br->levels[count - 1]) |
2924d2f8 RW |
873 | acpi_handle_info(device->handle, |
874 | "Found unordered _BCL package"); | |
469778c1 JJ |
875 | |
876 | br->count = count; | |
05950094 | 877 | *dev_br = br; |
9f9cd7ee AL |
878 | if (pmax_level) |
879 | *pmax_level = max_level; | |
05950094 AL |
880 | |
881 | out: | |
882 | kfree(obj); | |
883 | return result; | |
884 | out_free: | |
885 | kfree(br); | |
886 | goto out; | |
887 | } | |
888 | EXPORT_SYMBOL(acpi_video_get_levels); | |
889 | ||
890 | /* | |
891 | * Arg: | |
892 | * device : video output device (LCD, CRT, ..) | |
893 | * | |
894 | * Return Value: | |
895 | * Maximum brightness level | |
896 | * | |
897 | * Allocate and initialize device->brightness. | |
898 | */ | |
899 | ||
900 | static int | |
901 | acpi_video_init_brightness(struct acpi_video_device *device) | |
902 | { | |
903 | int i, max_level = 0; | |
904 | unsigned long long level, level_old; | |
905 | struct acpi_video_device_brightness *br = NULL; | |
966f58df | 906 | int result; |
05950094 | 907 | |
9f9cd7ee | 908 | result = acpi_video_get_levels(device->dev, &br, &max_level); |
05950094 AL |
909 | if (result) |
910 | return result; | |
469778c1 | 911 | device->brightness = br; |
1a7c618a | 912 | |
1a7c618a | 913 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 914 | br->curr = level = max_level; |
e047cca6 ZR |
915 | |
916 | if (!device->cap._BQC) | |
917 | goto set_level; | |
918 | ||
a89803df DB |
919 | result = acpi_video_device_lcd_get_level_current(device, |
920 | &level_old, true); | |
1a7c618a ZR |
921 | if (result) |
922 | goto out_free_levels; | |
923 | ||
a50188da | 924 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
925 | if (result) |
926 | goto out_free_levels; | |
a50188da AL |
927 | /* |
928 | * cap._BQC may get cleared due to _BQC is found to be broken | |
929 | * in acpi_video_bqc_quirk, so check again here. | |
930 | */ | |
931 | if (!device->cap._BQC) | |
932 | goto set_level; | |
e047cca6 | 933 | |
545ef368 AL |
934 | level = acpi_video_bqc_value_to_level(device, level_old); |
935 | /* | |
936 | * On some buggy laptops, _BQC returns an uninitialized | |
937 | * value when invoked for the first time, i.e. | |
938 | * level_old is invalid (no matter whether it's a level | |
939 | * or an index). Set the backlight to max_level in this case. | |
940 | */ | |
d485ef43 | 941 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < br->count; i++) |
545ef368 AL |
942 | if (level == br->levels[i]) |
943 | break; | |
944 | if (i == br->count || !level) | |
945 | level = max_level; | |
e047cca6 | 946 | |
e047cca6 | 947 | set_level: |
90c53ca4 | 948 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
949 | if (result) |
950 | goto out_free_levels; | |
1a7c618a | 951 | |
2924d2f8 RW |
952 | acpi_handle_debug(device->dev->handle, "found %d brightness levels\n", |
953 | br->count - ACPI_VIDEO_FIRST_LEVEL); | |
954 | ||
05950094 | 955 | return 0; |
469778c1 JJ |
956 | |
957 | out_free_levels: | |
958 | kfree(br->levels); | |
469778c1 | 959 | kfree(br); |
469778c1 | 960 | device->brightness = NULL; |
1a7c618a | 961 | return result; |
469778c1 JJ |
962 | } |
963 | ||
964 | /* | |
965 | * Arg: | |
966 | * device : video output device (LCD, CRT, ..) | |
967 | * | |
968 | * Return Value: | |
21fcb34e | 969 | * None |
1da177e4 | 970 | * |
98fb8fe1 | 971 | * Find out all required AML methods defined under the output |
1da177e4 LT |
972 | * device. |
973 | */ | |
974 | ||
4be44fcd | 975 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 976 | { |
952c63e9 | 977 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 978 | device->cap._ADR = 1; |
952c63e9 | 979 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 980 | device->cap._BCL = 1; |
952c63e9 | 981 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 982 | device->cap._BCM = 1; |
952c63e9 | 983 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 984 | device->cap._BQC = 1; |
952c63e9 | 985 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
2924d2f8 RW |
986 | acpi_handle_info(device->dev->handle, |
987 | "_BCQ is used instead of _BQC\n"); | |
c60d638e ZR |
988 | device->cap._BCQ = 1; |
989 | } | |
990 | ||
952c63e9 | 991 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 992 | device->cap._DDC = 1; |
1da177e4 LT |
993 | } |
994 | ||
995 | /* | |
21fcb34e FC |
996 | * Arg: |
997 | * device : video output device (VGA) | |
1da177e4 LT |
998 | * |
999 | * Return Value: | |
21fcb34e | 1000 | * None |
1da177e4 | 1001 | * |
98fb8fe1 | 1002 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
1003 | */ |
1004 | ||
4be44fcd | 1005 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1006 | { |
952c63e9 | 1007 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 1008 | video->cap._DOS = 1; |
952c63e9 | 1009 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 1010 | video->cap._DOD = 1; |
952c63e9 | 1011 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 1012 | video->cap._ROM = 1; |
952c63e9 | 1013 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 1014 | video->cap._GPD = 1; |
952c63e9 | 1015 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 1016 | video->cap._SPD = 1; |
952c63e9 | 1017 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 1018 | video->cap._VPO = 1; |
1da177e4 LT |
1019 | } |
1020 | ||
1021 | /* | |
1022 | * Check whether the video bus device has required AML method to | |
1023 | * support the desired features | |
1024 | */ | |
1025 | ||
4be44fcd | 1026 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1027 | { |
4be44fcd | 1028 | acpi_status status = -ENOENT; |
1e4cffe7 | 1029 | struct pci_dev *dev; |
1da177e4 LT |
1030 | |
1031 | if (!video) | |
d550d98d | 1032 | return -EINVAL; |
1da177e4 | 1033 | |
1e4cffe7 | 1034 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1035 | if (!dev) |
1036 | return -ENODEV; | |
1e4cffe7 | 1037 | pci_dev_put(dev); |
22c13f9d | 1038 | |
21fcb34e FC |
1039 | /* |
1040 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1041 | * to check well known required nodes. |
1042 | */ | |
1043 | ||
98fb8fe1 | 1044 | /* Does this device support video switching? */ |
3a1151e3 SB |
1045 | if (video->cap._DOS || video->cap._DOD) { |
1046 | if (!video->cap._DOS) { | |
2924d2f8 | 1047 | pr_info(FW_BUG "ACPI(%s) defines _DOD but not _DOS\n", |
3a1151e3 SB |
1048 | acpi_device_bid(video->device)); |
1049 | } | |
1da177e4 LT |
1050 | video->flags.multihead = 1; |
1051 | status = 0; | |
1052 | } | |
1053 | ||
98fb8fe1 | 1054 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1055 | if (video->cap._ROM) { |
1da177e4 LT |
1056 | video->flags.rom = 1; |
1057 | status = 0; | |
1058 | } | |
1059 | ||
98fb8fe1 | 1060 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1061 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1062 | video->flags.post = 1; |
1063 | status = 0; | |
1064 | } | |
1065 | ||
d550d98d | 1066 | return status; |
1da177e4 LT |
1067 | } |
1068 | ||
21fcb34e FC |
1069 | /* |
1070 | * -------------------------------------------------------------------------- | |
1071 | * Driver Interface | |
1072 | * -------------------------------------------------------------------------- | |
1073 | */ | |
1da177e4 LT |
1074 | |
1075 | /* device interface */ | |
915ea7e4 | 1076 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1077 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1078 | { | |
78eed028 DT |
1079 | struct acpi_video_enumerated_device *ids; |
1080 | int i; | |
1081 | ||
1082 | for (i = 0; i < video->attached_count; i++) { | |
1083 | ids = &video->attached_array[i]; | |
1084 | if ((ids->value.int_val & 0xffff) == device_id) | |
1085 | return &ids->value.attrib; | |
1086 | } | |
82cae999 | 1087 | |
82cae999 RZ |
1088 | return NULL; |
1089 | } | |
1da177e4 | 1090 | |
e92a7162 MG |
1091 | static int |
1092 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1093 | unsigned long device_id) | |
1094 | { | |
1095 | struct acpi_video_enumerated_device *ids; | |
1096 | int i; | |
1097 | ||
1098 | for (i = 0; i < video->attached_count; i++) { | |
1099 | ids = &video->attached_array[i]; | |
1100 | if ((ids->value.int_val & 0xffff) == device_id) | |
1101 | return ids->value.int_val; | |
1102 | } | |
1103 | ||
1104 | return 0; | |
1105 | } | |
1106 | ||
0ea3ef24 | 1107 | static int acpi_video_bus_get_one_device(struct acpi_device *device, void *arg) |
1da177e4 | 1108 | { |
0ea3ef24 | 1109 | struct acpi_video_bus *video = arg; |
915ea7e4 | 1110 | struct acpi_video_device_attrib *attribute; |
0ea3ef24 RW |
1111 | struct acpi_video_device *data; |
1112 | unsigned long long device_id; | |
1113 | acpi_status status; | |
1114 | int device_type; | |
1da177e4 | 1115 | |
0ea3ef24 RW |
1116 | status = acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); |
1117 | /* Skip devices without _ADR instead of failing. */ | |
91e13aa3 | 1118 | if (ACPI_FAILURE(status)) |
0ea3ef24 | 1119 | goto exit; |
1da177e4 | 1120 | |
91e13aa3 | 1121 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
0ea3ef24 RW |
1122 | if (!data) { |
1123 | dev_dbg(&device->dev, "Cannot attach\n"); | |
91e13aa3 | 1124 | return -ENOMEM; |
0ea3ef24 | 1125 | } |
82cae999 | 1126 | |
91e13aa3 AL |
1127 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1128 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1129 | device->driver_data = data; | |
1130 | ||
1131 | data->device_id = device_id; | |
1132 | data->video = video; | |
1133 | data->dev = device; | |
8ab58e8e LT |
1134 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1135 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1136 | |
1137 | attribute = acpi_video_get_device_attr(video, device_id); | |
1138 | ||
e50b9be1 | 1139 | if (attribute && (attribute->device_id_scheme || device_id_scheme)) { |
91e13aa3 AL |
1140 | switch (attribute->display_type) { |
1141 | case ACPI_VIDEO_DISPLAY_CRT: | |
1142 | data->flags.crt = 1; | |
1143 | break; | |
1144 | case ACPI_VIDEO_DISPLAY_TV: | |
1145 | data->flags.tvout = 1; | |
1146 | break; | |
1147 | case ACPI_VIDEO_DISPLAY_DVI: | |
1148 | data->flags.dvi = 1; | |
1149 | break; | |
1150 | case ACPI_VIDEO_DISPLAY_LCD: | |
1151 | data->flags.lcd = 1; | |
1152 | break; | |
1153 | default: | |
1154 | data->flags.unknown = 1; | |
1155 | break; | |
1156 | } | |
915ea7e4 | 1157 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1158 | data->flags.bios = 1; |
1159 | } else { | |
1160 | /* Check for legacy IDs */ | |
1161 | device_type = acpi_video_get_device_type(video, device_id); | |
1162 | /* Ignore bits 16 and 18-20 */ | |
1163 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1164 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1165 | data->flags.crt = 1; | |
1166 | break; | |
1167 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1168 | data->flags.lcd = 1; | |
1169 | break; | |
1170 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1171 | data->flags.tvout = 1; | |
1172 | break; | |
1173 | default: | |
1174 | data->flags.unknown = 1; | |
e92a7162 | 1175 | } |
91e13aa3 | 1176 | } |
4be44fcd | 1177 | |
91e13aa3 AL |
1178 | acpi_video_device_bind(video, data); |
1179 | acpi_video_device_find_cap(data); | |
1da177e4 | 1180 | |
3a0cf7ab | 1181 | if (data->cap._BCM && data->cap._BCL) |
5ad26161 | 1182 | may_report_brightness_keys = true; |
3a0cf7ab | 1183 | |
91e13aa3 AL |
1184 | mutex_lock(&video->device_list_lock); |
1185 | list_add_tail(&data->entry, &video->video_device_list); | |
1186 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1187 | |
0ea3ef24 RW |
1188 | exit: |
1189 | video->child_count++; | |
1190 | return 0; | |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | /* | |
1194 | * Arg: | |
21fcb34e | 1195 | * video : video bus device |
1da177e4 LT |
1196 | * |
1197 | * Return: | |
21fcb34e FC |
1198 | * none |
1199 | * | |
1200 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1201 | * bind the ids with the corresponding video devices |
1202 | * under the video bus. | |
4be44fcd | 1203 | */ |
1da177e4 | 1204 | |
4be44fcd | 1205 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1206 | { |
ff102ea9 DT |
1207 | struct acpi_video_device *dev; |
1208 | ||
bbac81f5 | 1209 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1210 | |
1211 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1212 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1213 | |
bbac81f5 | 1214 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1215 | } |
1216 | ||
1217 | /* | |
1218 | * Arg: | |
21fcb34e FC |
1219 | * video : video bus device |
1220 | * device : video output device under the video | |
1221 | * bus | |
1da177e4 LT |
1222 | * |
1223 | * Return: | |
21fcb34e FC |
1224 | * none |
1225 | * | |
1da177e4 LT |
1226 | * Bind the ids with the corresponding video devices |
1227 | * under the video bus. | |
4be44fcd | 1228 | */ |
1da177e4 LT |
1229 | |
1230 | static void | |
4be44fcd LB |
1231 | acpi_video_device_bind(struct acpi_video_bus *video, |
1232 | struct acpi_video_device *device) | |
1da177e4 | 1233 | { |
78eed028 | 1234 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1235 | int i; |
1da177e4 | 1236 | |
78eed028 DT |
1237 | for (i = 0; i < video->attached_count; i++) { |
1238 | ids = &video->attached_array[i]; | |
1239 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1240 | ids->bind_info = device; | |
2924d2f8 RW |
1241 | acpi_handle_debug(video->device->handle, "%s: %d\n", |
1242 | __func__, i); | |
1da177e4 LT |
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); |
2924d2f8 RW |
1294 | if (ACPI_FAILURE(status)) { |
1295 | acpi_handle_info(video->device->handle, | |
1296 | "_DOD evaluation failed: %s\n", | |
1297 | acpi_format_exception(status)); | |
d550d98d | 1298 | return status; |
1da177e4 LT |
1299 | } |
1300 | ||
50dd0969 | 1301 | dod = buffer.pointer; |
1da177e4 | 1302 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
2924d2f8 | 1303 | acpi_handle_info(video->device->handle, "Invalid _DOD data\n"); |
1da177e4 LT |
1304 | status = -EFAULT; |
1305 | goto out; | |
1306 | } | |
1307 | ||
2924d2f8 RW |
1308 | acpi_handle_debug(video->device->handle, "Found %d video heads in _DOD\n", |
1309 | dod->package.count); | |
1da177e4 | 1310 | |
78eed028 DT |
1311 | active_list = kcalloc(1 + dod->package.count, |
1312 | sizeof(struct acpi_video_enumerated_device), | |
1313 | GFP_KERNEL); | |
1314 | if (!active_list) { | |
1da177e4 LT |
1315 | status = -ENOMEM; |
1316 | goto out; | |
1317 | } | |
1318 | ||
1319 | count = 0; | |
1320 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1321 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1322 | |
1323 | if (obj->type != ACPI_TYPE_INTEGER) { | |
2924d2f8 RW |
1324 | acpi_handle_info(video->device->handle, |
1325 | "Invalid _DOD data in element %d\n", i); | |
78eed028 | 1326 | continue; |
1da177e4 | 1327 | } |
78eed028 DT |
1328 | |
1329 | active_list[count].value.int_val = obj->integer.value; | |
1330 | active_list[count].bind_info = NULL; | |
2924d2f8 RW |
1331 | |
1332 | acpi_handle_debug(video->device->handle, | |
1333 | "_DOD element[%d] = %d\n", i, | |
1334 | (int)obj->integer.value); | |
1335 | ||
1da177e4 LT |
1336 | count++; |
1337 | } | |
1da177e4 | 1338 | |
6044ec88 | 1339 | kfree(video->attached_array); |
4be44fcd | 1340 | |
78eed028 | 1341 | video->attached_array = active_list; |
1da177e4 | 1342 | video->attached_count = count; |
78eed028 | 1343 | |
915ea7e4 | 1344 | out: |
02438d87 | 1345 | kfree(buffer.pointer); |
d550d98d | 1346 | return status; |
1da177e4 LT |
1347 | } |
1348 | ||
4be44fcd LB |
1349 | static int |
1350 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1351 | u32 level_current, u32 event) | |
1da177e4 | 1352 | { |
63f0edfc | 1353 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1354 | max = max_below = 0; |
1355 | min = min_above = 255; | |
63f0edfc | 1356 | /* Find closest level to level_current */ |
d485ef43 | 1357 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) { |
63f0edfc AS |
1358 | l = device->brightness->levels[i]; |
1359 | if (abs(l - level_current) < abs(delta)) { | |
1360 | delta = l - level_current; | |
1361 | if (!delta) | |
1362 | break; | |
1363 | } | |
1364 | } | |
935ab850 | 1365 | /* Adjust level_current to closest available level */ |
63f0edfc | 1366 | level_current += delta; |
d485ef43 | 1367 | for (i = ACPI_VIDEO_FIRST_LEVEL; i < device->brightness->count; i++) { |
f4715189 TT |
1368 | l = device->brightness->levels[i]; |
1369 | if (l < min) | |
1370 | min = l; | |
1371 | if (l > max) | |
1372 | max = l; | |
1373 | if (l < min_above && l > level_current) | |
1374 | min_above = l; | |
1375 | if (l > max_below && l < level_current) | |
1376 | max_below = l; | |
1377 | } | |
1378 | ||
1379 | switch (event) { | |
1380 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1381 | return (level_current < max) ? min_above : min; | |
1382 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1383 | return (level_current < max) ? min_above : max; | |
1384 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1385 | return (level_current > min) ? max_below : min; | |
1386 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1387 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1388 | return 0; | |
1389 | default: | |
1390 | return level_current; | |
1391 | } | |
1da177e4 LT |
1392 | } |
1393 | ||
8ab58e8e LT |
1394 | static void |
1395 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1396 | { |
8ab58e8e LT |
1397 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1398 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1399 | unsigned long long level_current, level_next; |
8ab58e8e | 1400 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1401 | int result = -EINVAL; |
1402 | ||
fbc9fe1b | 1403 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
654a182d | 1404 | if (!device->backlight) |
8ab58e8e | 1405 | return; |
28c32e99 | 1406 | |
469778c1 | 1407 | if (!device->brightness) |
c8890f90 ZR |
1408 | goto out; |
1409 | ||
1410 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1411 | &level_current, |
1412 | false); | |
c8890f90 ZR |
1413 | if (result) |
1414 | goto out; | |
1415 | ||
1da177e4 | 1416 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1417 | |
24450c7a | 1418 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1419 | |
36342742 MG |
1420 | if (!result) |
1421 | backlight_force_update(device->backlight, | |
1422 | BACKLIGHT_UPDATE_HOTKEY); | |
1423 | ||
c8890f90 ZR |
1424 | out: |
1425 | if (result) | |
2924d2f8 RW |
1426 | acpi_handle_info(device->dev->handle, |
1427 | "Failed to switch brightness\n"); | |
1da177e4 LT |
1428 | } |
1429 | ||
e92a7162 MG |
1430 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1431 | void **edid) | |
1432 | { | |
1433 | struct acpi_video_bus *video; | |
1434 | struct acpi_video_device *video_device; | |
1435 | union acpi_object *buffer = NULL; | |
1436 | acpi_status status; | |
1437 | int i, length; | |
1438 | ||
1439 | if (!device || !acpi_driver_data(device)) | |
1440 | return -EINVAL; | |
1441 | ||
1442 | video = acpi_driver_data(device); | |
1443 | ||
1444 | for (i = 0; i < video->attached_count; i++) { | |
1445 | video_device = video->attached_array[i].bind_info; | |
1446 | length = 256; | |
1447 | ||
1448 | if (!video_device) | |
1449 | continue; | |
1450 | ||
82069552 ZR |
1451 | if (!video_device->cap._DDC) |
1452 | continue; | |
1453 | ||
e92a7162 MG |
1454 | if (type) { |
1455 | switch (type) { | |
1456 | case ACPI_VIDEO_DISPLAY_CRT: | |
1457 | if (!video_device->flags.crt) | |
1458 | continue; | |
1459 | break; | |
1460 | case ACPI_VIDEO_DISPLAY_TV: | |
1461 | if (!video_device->flags.tvout) | |
1462 | continue; | |
1463 | break; | |
1464 | case ACPI_VIDEO_DISPLAY_DVI: | |
1465 | if (!video_device->flags.dvi) | |
1466 | continue; | |
1467 | break; | |
1468 | case ACPI_VIDEO_DISPLAY_LCD: | |
1469 | if (!video_device->flags.lcd) | |
1470 | continue; | |
1471 | break; | |
1472 | } | |
1473 | } else if (video_device->device_id != device_id) { | |
1474 | continue; | |
1475 | } | |
1476 | ||
1477 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1478 | ||
1479 | if (ACPI_FAILURE(status) || !buffer || | |
1480 | buffer->type != ACPI_TYPE_BUFFER) { | |
1481 | length = 128; | |
1482 | status = acpi_video_device_EDID(video_device, &buffer, | |
1483 | length); | |
1484 | if (ACPI_FAILURE(status) || !buffer || | |
1485 | buffer->type != ACPI_TYPE_BUFFER) { | |
1486 | continue; | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | *edid = buffer->buffer.pointer; | |
1491 | return length; | |
1492 | } | |
1493 | ||
1494 | return -ENODEV; | |
1495 | } | |
1496 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1497 | ||
1da177e4 | 1498 | static int |
4be44fcd LB |
1499 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1500 | struct acpi_device *device) | |
1da177e4 | 1501 | { |
fba4e087 IM |
1502 | /* |
1503 | * There are systems where video module known to work fine regardless | |
1504 | * of broken _DOD and ignoring returned value here doesn't cause | |
1505 | * any issues later. | |
1506 | */ | |
1507 | acpi_video_device_enumerate(video); | |
1da177e4 | 1508 | |
0ea3ef24 | 1509 | return acpi_dev_for_each_child(device, acpi_video_bus_get_one_device, video); |
1da177e4 LT |
1510 | } |
1511 | ||
1da177e4 LT |
1512 | /* acpi_video interface */ |
1513 | ||
efaa14c7 AL |
1514 | /* |
1515 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
935ab850 | 1516 | * perform any automatic brightness change on receiving a notification. |
efaa14c7 | 1517 | */ |
4be44fcd | 1518 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1519 | { |
efaa14c7 | 1520 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1521 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1522 | } |
1523 | ||
4be44fcd | 1524 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1525 | { |
efaa14c7 | 1526 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1527 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1528 | } |
1529 | ||
7015558f | 1530 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1531 | { |
7015558f | 1532 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1533 | struct input_dev *input; |
17c452f9 | 1534 | int keycode = 0; |
e9dab196 | 1535 | |
67b662e1 | 1536 | if (!video || !video->input) |
d550d98d | 1537 | return; |
1da177e4 | 1538 | |
e9dab196 | 1539 | input = video->input; |
1da177e4 LT |
1540 | |
1541 | switch (event) { | |
98fb8fe1 | 1542 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1543 | * most likely via hotkey. */ |
8a37c65d | 1544 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1545 | break; |
1546 | ||
98fb8fe1 | 1547 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1548 | * connector. */ |
1549 | acpi_video_device_enumerate(video); | |
1550 | acpi_video_device_rebind(video); | |
e9dab196 | 1551 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1552 | break; |
1553 | ||
4be44fcd | 1554 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1555 | keycode = KEY_SWITCHVIDEOMODE; |
1556 | break; | |
4be44fcd | 1557 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1558 | keycode = KEY_VIDEO_NEXT; |
1559 | break; | |
4be44fcd | 1560 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1561 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1562 | break; |
1563 | ||
1564 | default: | |
2924d2f8 RW |
1565 | acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", |
1566 | event); | |
1da177e4 LT |
1567 | break; |
1568 | } | |
1569 | ||
8a37c65d LT |
1570 | if (acpi_notifier_call_chain(device, event, 0)) |
1571 | /* Something vetoed the keypress. */ | |
1572 | keycode = 0; | |
17c452f9 | 1573 | |
05bc59a0 | 1574 | if (keycode && (report_key_events & REPORT_OUTPUT_KEY_EVENTS)) { |
17c452f9 MG |
1575 | input_report_key(input, keycode, 1); |
1576 | input_sync(input); | |
1577 | input_report_key(input, keycode, 0); | |
1578 | input_sync(input); | |
1579 | } | |
1da177e4 LT |
1580 | } |
1581 | ||
8ab58e8e LT |
1582 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1583 | u32 event) | |
1584 | { | |
1585 | if (!brightness_switch_enabled) | |
1586 | return; | |
1587 | ||
1588 | video_device->switch_brightness_event = event; | |
1589 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1590 | } | |
1591 | ||
4be44fcd | 1592 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1593 | { |
50dd0969 | 1594 | struct acpi_video_device *video_device = data; |
4be44fcd | 1595 | struct acpi_device *device = NULL; |
e9dab196 LY |
1596 | struct acpi_video_bus *bus; |
1597 | struct input_dev *input; | |
17c452f9 | 1598 | int keycode = 0; |
1da177e4 | 1599 | |
1da177e4 | 1600 | if (!video_device) |
d550d98d | 1601 | return; |
1da177e4 | 1602 | |
e6afa0de | 1603 | device = video_device->dev; |
e9dab196 LY |
1604 | bus = video_device->video; |
1605 | input = bus->input; | |
1da177e4 | 1606 | |
4f7f9645 HG |
1607 | if (hw_changes_brightness > 0) { |
1608 | if (video_device->backlight) | |
1609 | backlight_force_update(video_device->backlight, | |
1610 | BACKLIGHT_UPDATE_HOTKEY); | |
1611 | acpi_notifier_call_chain(device, event, 0); | |
1612 | return; | |
1613 | } | |
1614 | ||
1da177e4 | 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: | |
2924d2f8 | 1637 | acpi_handle_debug(handle, "Unsupported event [0x%x]\n", event); |
1da177e4 LT |
1638 | break; |
1639 | } | |
e9dab196 | 1640 | |
5ad26161 HG |
1641 | if (keycode) |
1642 | may_report_brightness_keys = true; | |
1643 | ||
7761f638 | 1644 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 | 1645 | |
05bc59a0 | 1646 | if (keycode && (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS)) { |
17c452f9 MG |
1647 | input_report_key(input, keycode, 1); |
1648 | input_sync(input); | |
1649 | input_report_key(input, keycode, 0); | |
1650 | input_sync(input); | |
1651 | } | |
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 | 1661 | switch (val) { |
1934fee6 ZR |
1662 | case PM_POST_HIBERNATION: |
1663 | case PM_POST_SUSPEND: | |
1664 | case PM_POST_RESTORE: | |
1665 | video = container_of(nb, struct acpi_video_bus, pm_nb); | |
1666 | ||
1667 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
1668 | ||
1669 | for (i = 0; i < video->attached_count; i++) { | |
1670 | video_device = video->attached_array[i].bind_info; | |
1671 | if (video_device && video_device->brightness) | |
1672 | acpi_video_device_lcd_set_level(video_device, | |
1673 | video_device->brightness->curr); | |
1674 | } | |
863c1490 | 1675 | |
1934fee6 | 1676 | return NOTIFY_OK; |
863c1490 | 1677 | } |
1934fee6 | 1678 | return NOTIFY_DONE; |
863c1490 MG |
1679 | } |
1680 | ||
c504f8cb ZR |
1681 | static acpi_status |
1682 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1683 | void **return_value) | |
1684 | { | |
1685 | struct acpi_device *device = context; | |
1686 | struct acpi_device *sibling; | |
c504f8cb ZR |
1687 | |
1688 | if (handle == device->handle) | |
1689 | return AE_CTRL_TERMINATE; | |
1690 | ||
99ece713 RW |
1691 | sibling = acpi_fetch_acpi_dev(handle); |
1692 | if (!sibling) | |
c504f8cb ZR |
1693 | return AE_OK; |
1694 | ||
1695 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1696 | return AE_ALREADY_EXISTS; | |
1697 | ||
1698 | return AE_OK; | |
1699 | } | |
1700 | ||
67b662e1 AL |
1701 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1702 | { | |
99678ed7 HG |
1703 | struct backlight_properties props; |
1704 | struct pci_dev *pdev; | |
1705 | acpi_handle acpi_parent; | |
1706 | struct device *parent = NULL; | |
1707 | int result; | |
1708 | static int count; | |
1709 | char *name; | |
67b662e1 | 1710 | |
99678ed7 HG |
1711 | result = acpi_video_init_brightness(device); |
1712 | if (result) | |
1713 | return; | |
654a182d | 1714 | |
99678ed7 HG |
1715 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
1716 | if (!name) | |
1717 | return; | |
1718 | count++; | |
67b662e1 | 1719 | |
99678ed7 | 1720 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1721 | |
99678ed7 HG |
1722 | pdev = acpi_get_pci_dev(acpi_parent); |
1723 | if (pdev) { | |
1724 | parent = &pdev->dev; | |
1725 | pci_dev_put(pdev); | |
1726 | } | |
67b662e1 | 1727 | |
99678ed7 HG |
1728 | memset(&props, 0, sizeof(struct backlight_properties)); |
1729 | props.type = BACKLIGHT_FIRMWARE; | |
d485ef43 DF |
1730 | props.max_brightness = |
1731 | device->brightness->count - ACPI_VIDEO_FIRST_LEVEL - 1; | |
99678ed7 HG |
1732 | device->backlight = backlight_device_register(name, |
1733 | parent, | |
1734 | device, | |
1735 | &acpi_backlight_ops, | |
1736 | &props); | |
1737 | kfree(name); | |
654a182d HG |
1738 | if (IS_ERR(device->backlight)) { |
1739 | device->backlight = NULL; | |
99678ed7 | 1740 | return; |
654a182d | 1741 | } |
67b662e1 | 1742 | |
99678ed7 HG |
1743 | /* |
1744 | * Save current brightness level in case we have to restore it | |
1745 | * before acpi_video_device_lcd_set_level() is called next time. | |
1746 | */ | |
1747 | device->backlight->props.brightness = | |
1748 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1749 | |
99678ed7 HG |
1750 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1751 | device->dev, &video_cooling_ops); | |
1752 | if (IS_ERR(device->cooling_dev)) { | |
1753 | /* | |
1754 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1755 | * Also, why the hell we are returning early and not attempt to | |
1756 | * register video output if cooling device registration failed? | |
1757 | * -- dtor | |
1758 | */ | |
1759 | device->cooling_dev = NULL; | |
1760 | return; | |
67b662e1 | 1761 | } |
99678ed7 HG |
1762 | |
1763 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1764 | device->cooling_dev->id); | |
1765 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1766 | &device->cooling_dev->device.kobj, | |
1767 | "thermal_cooling"); | |
1768 | if (result) | |
2924d2f8 RW |
1769 | pr_info("sysfs link creation failed\n"); |
1770 | ||
99678ed7 HG |
1771 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
1772 | &device->dev->dev.kobj, "device"); | |
1773 | if (result) | |
2924d2f8 | 1774 | pr_info("Reverse sysfs link creation failed\n"); |
67b662e1 AL |
1775 | } |
1776 | ||
dce4ec2e AL |
1777 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1778 | { | |
1779 | struct acpi_video_device *dev; | |
1780 | union acpi_object *levels; | |
1781 | ||
1782 | mutex_lock(&video->device_list_lock); | |
1783 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
9f9cd7ee | 1784 | if (!acpi_video_device_lcd_query_levels(dev->dev->handle, &levels)) |
dce4ec2e AL |
1785 | kfree(levels); |
1786 | } | |
1787 | mutex_unlock(&video->device_list_lock); | |
1788 | } | |
1789 | ||
e50b9be1 AL |
1790 | static bool acpi_video_should_register_backlight(struct acpi_video_device *dev) |
1791 | { | |
1792 | /* | |
1793 | * Do not create backlight device for video output | |
1794 | * device that is not in the enumerated list. | |
1795 | */ | |
1796 | if (!acpi_video_device_in_dod(dev)) { | |
1797 | dev_dbg(&dev->dev->dev, "not in _DOD list, ignore\n"); | |
1798 | return false; | |
1799 | } | |
1800 | ||
1801 | if (only_lcd) | |
1802 | return dev->flags.lcd; | |
1803 | return true; | |
1804 | } | |
1805 | ||
67b662e1 AL |
1806 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1807 | { | |
1808 | struct acpi_video_device *dev; | |
1809 | ||
53a92ba7 HG |
1810 | if (video->backlight_registered) |
1811 | return 0; | |
1812 | ||
3bd6bce3 | 1813 | if (acpi_video_get_backlight_type() != acpi_backlight_video) |
99678ed7 HG |
1814 | return 0; |
1815 | ||
67b662e1 | 1816 | mutex_lock(&video->device_list_lock); |
e50b9be1 AL |
1817 | list_for_each_entry(dev, &video->video_device_list, entry) { |
1818 | if (acpi_video_should_register_backlight(dev)) | |
1819 | acpi_video_dev_register_backlight(dev); | |
1820 | } | |
67b662e1 AL |
1821 | mutex_unlock(&video->device_list_lock); |
1822 | ||
99678ed7 HG |
1823 | video->backlight_registered = true; |
1824 | ||
67b662e1 AL |
1825 | video->pm_nb.notifier_call = acpi_video_resume; |
1826 | video->pm_nb.priority = 0; | |
1827 | return register_pm_notifier(&video->pm_nb); | |
1828 | } | |
1829 | ||
1830 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1831 | { | |
1832 | if (device->backlight) { | |
1833 | backlight_device_unregister(device->backlight); | |
1834 | device->backlight = NULL; | |
1835 | } | |
1836 | if (device->brightness) { | |
1837 | kfree(device->brightness->levels); | |
1838 | kfree(device->brightness); | |
1839 | device->brightness = NULL; | |
1840 | } | |
1841 | if (device->cooling_dev) { | |
1842 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1843 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1844 | thermal_cooling_device_unregister(device->cooling_dev); | |
1845 | device->cooling_dev = NULL; | |
1846 | } | |
1847 | } | |
1848 | ||
1849 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1850 | { | |
1851 | struct acpi_video_device *dev; | |
99678ed7 HG |
1852 | int error; |
1853 | ||
1854 | if (!video->backlight_registered) | |
1855 | return 0; | |
1856 | ||
1857 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1858 | |
1859 | mutex_lock(&video->device_list_lock); | |
1860 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1861 | acpi_video_dev_unregister_backlight(dev); | |
1862 | mutex_unlock(&video->device_list_lock); | |
1863 | ||
99678ed7 HG |
1864 | video->backlight_registered = false; |
1865 | ||
67b662e1 AL |
1866 | return error; |
1867 | } | |
1868 | ||
1869 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1870 | { | |
1871 | acpi_status status; | |
1872 | struct acpi_device *adev = device->dev; | |
1873 | ||
1874 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1875 | acpi_video_device_notify, device); | |
1876 | if (ACPI_FAILURE(status)) | |
1877 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1878 | else | |
1879 | device->flags.notify = 1; | |
1880 | } | |
1881 | ||
1882 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1883 | { | |
1884 | struct input_dev *input; | |
1885 | struct acpi_video_device *dev; | |
1886 | int error; | |
1887 | ||
1888 | video->input = input = input_allocate_device(); | |
1889 | if (!input) { | |
1890 | error = -ENOMEM; | |
1891 | goto out; | |
1892 | } | |
1893 | ||
1894 | error = acpi_video_bus_start_devices(video); | |
1895 | if (error) | |
1896 | goto err_free_input; | |
1897 | ||
1898 | snprintf(video->phys, sizeof(video->phys), | |
1899 | "%s/video/input0", acpi_device_hid(video->device)); | |
1900 | ||
1901 | input->name = acpi_device_name(video->device); | |
1902 | input->phys = video->phys; | |
1903 | input->id.bustype = BUS_HOST; | |
1904 | input->id.product = 0x06; | |
1905 | input->dev.parent = &video->device->dev; | |
1906 | input->evbit[0] = BIT(EV_KEY); | |
1907 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1908 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1909 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1910 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1911 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1912 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1913 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1914 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1915 | ||
1916 | error = input_register_device(input); | |
1917 | if (error) | |
1918 | goto err_stop_dev; | |
1919 | ||
1920 | mutex_lock(&video->device_list_lock); | |
1921 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1922 | acpi_video_dev_add_notify_handler(dev); | |
1923 | mutex_unlock(&video->device_list_lock); | |
1924 | ||
1925 | return 0; | |
1926 | ||
1927 | err_stop_dev: | |
1928 | acpi_video_bus_stop_devices(video); | |
1929 | err_free_input: | |
1930 | input_free_device(input); | |
1931 | video->input = NULL; | |
1932 | out: | |
1933 | return error; | |
1934 | } | |
1935 | ||
1936 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1937 | { | |
1938 | if (dev->flags.notify) { | |
1939 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1940 | acpi_video_device_notify); | |
1941 | dev->flags.notify = 0; | |
1942 | } | |
1943 | } | |
1944 | ||
1945 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1946 | { | |
1947 | struct acpi_video_device *dev; | |
1948 | ||
1949 | mutex_lock(&video->device_list_lock); | |
1950 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1951 | acpi_video_dev_remove_notify_handler(dev); | |
1952 | mutex_unlock(&video->device_list_lock); | |
1953 | ||
1954 | acpi_video_bus_stop_devices(video); | |
1955 | input_unregister_device(video->input); | |
1956 | video->input = NULL; | |
1957 | } | |
1958 | ||
1959 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1960 | { | |
1961 | struct acpi_video_device *dev, *next; | |
1962 | ||
1963 | mutex_lock(&video->device_list_lock); | |
1964 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1965 | list_del(&dev->entry); | |
1966 | kfree(dev); | |
1967 | } | |
1968 | mutex_unlock(&video->device_list_lock); | |
1969 | ||
1970 | return 0; | |
1971 | } | |
1972 | ||
ac7729da RW |
1973 | static int instance; |
1974 | ||
4be44fcd | 1975 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1976 | { |
f51e8391 | 1977 | struct acpi_video_bus *video; |
e506731c | 1978 | bool auto_detect; |
f51e8391 | 1979 | int error; |
c504f8cb ZR |
1980 | acpi_status status; |
1981 | ||
1982 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
62fcb99b | 1983 | acpi_dev_parent(device)->handle, 1, |
c504f8cb ZR |
1984 | acpi_video_bus_match, NULL, |
1985 | device, NULL); | |
1986 | if (status == AE_ALREADY_EXISTS) { | |
2924d2f8 | 1987 | pr_info(FW_BUG |
c504f8cb ZR |
1988 | "Duplicate ACPI video bus devices for the" |
1989 | " same VGA controller, please try module " | |
1990 | "parameter \"video.allow_duplicates=1\"" | |
1991 | "if the current driver doesn't work.\n"); | |
1992 | if (!allow_duplicates) | |
1993 | return -ENODEV; | |
1994 | } | |
1da177e4 | 1995 | |
36bcbec7 | 1996 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1997 | if (!video) |
d550d98d | 1998 | return -ENOMEM; |
1da177e4 | 1999 | |
e6d9da1d ZR |
2000 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
2001 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
2002 | if (instance) | |
2003 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 2004 | instance++; |
e6d9da1d | 2005 | } |
f3b39f13 ZY |
2006 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
2007 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
2008 | if (instance) | |
2009 | device->pnp.bus_id[3] = '0' + instance; | |
2010 | instance++; | |
2011 | } | |
e6d9da1d | 2012 | |
e6afa0de | 2013 | video->device = device; |
1da177e4 LT |
2014 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
2015 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 2016 | device->driver_data = video; |
1da177e4 LT |
2017 | |
2018 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
2019 | error = acpi_video_bus_check(video); |
2020 | if (error) | |
2021 | goto err_free_video; | |
1da177e4 | 2022 | |
bbac81f5 | 2023 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
2024 | INIT_LIST_HEAD(&video->video_device_list); |
2025 | ||
ea9f8856 IM |
2026 | error = acpi_video_bus_get_devices(video, device); |
2027 | if (error) | |
91e13aa3 | 2028 | goto err_put_video; |
1da177e4 | 2029 | |
2924d2f8 | 2030 | pr_info("%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
2031 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
2032 | video->flags.multihead ? "yes" : "no", | |
2033 | video->flags.rom ? "yes" : "no", | |
2034 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
2035 | mutex_lock(&video_list_lock); |
2036 | list_add_tail(&video->entry, &video_bus_head); | |
2037 | mutex_unlock(&video_list_lock); | |
1da177e4 | 2038 | |
3dbc80a3 | 2039 | /* |
e506731c HG |
2040 | * If backlight-type auto-detection is used then a native backlight may |
2041 | * show up later and this may change the result from video to native. | |
2042 | * Therefor normally the userspace visible /sys/class/backlight device | |
2043 | * gets registered separately by the GPU driver calling | |
2044 | * acpi_video_register_backlight() when an internal panel is detected. | |
2045 | * Register the backlight now when not using auto-detection, so that | |
2046 | * when the kernel cmdline or DMI-quirks are used the backlight will | |
2047 | * get registered even if acpi_video_register_backlight() is not called. | |
3dbc80a3 HG |
2048 | */ |
2049 | acpi_video_run_bcl_for_osi(video); | |
e506731c HG |
2050 | if (__acpi_video_get_backlight_type(false, &auto_detect) == acpi_backlight_video && |
2051 | !auto_detect) | |
2052 | acpi_video_bus_register_backlight(video); | |
2053 | ||
67b662e1 | 2054 | acpi_video_bus_add_notify_handler(video); |
ac7729da | 2055 | |
f51e8391 DT |
2056 | return 0; |
2057 | ||
67b662e1 | 2058 | err_put_video: |
f51e8391 DT |
2059 | acpi_video_bus_put_devices(video); |
2060 | kfree(video->attached_array); | |
67b662e1 | 2061 | err_free_video: |
f51e8391 | 2062 | kfree(video); |
db89b4f0 | 2063 | device->driver_data = NULL; |
1da177e4 | 2064 | |
f51e8391 | 2065 | return error; |
1da177e4 LT |
2066 | } |
2067 | ||
6c0eb5ba | 2068 | static void acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 2069 | { |
4be44fcd | 2070 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2071 | |
1da177e4 LT |
2072 | |
2073 | if (!device || !acpi_driver_data(device)) | |
6c0eb5ba | 2074 | return; |
1da177e4 | 2075 | |
50dd0969 | 2076 | video = acpi_driver_data(device); |
1da177e4 | 2077 | |
67b662e1 AL |
2078 | mutex_lock(&video_list_lock); |
2079 | list_del(&video->entry); | |
2080 | mutex_unlock(&video_list_lock); | |
2081 | ||
c1af8bec HG |
2082 | acpi_video_bus_remove_notify_handler(video); |
2083 | acpi_video_bus_unregister_backlight(video); | |
2084 | acpi_video_bus_put_devices(video); | |
2085 | ||
6044ec88 | 2086 | kfree(video->attached_array); |
1da177e4 | 2087 | kfree(video); |
1da177e4 LT |
2088 | } |
2089 | ||
c6996bdd AC |
2090 | static int __init is_i740(struct pci_dev *dev) |
2091 | { | |
2092 | if (dev->device == 0x00D1) | |
2093 | return 1; | |
2094 | if (dev->device == 0x7000) | |
2095 | return 1; | |
2096 | return 0; | |
2097 | } | |
2098 | ||
74a365b3 MG |
2099 | static int __init intel_opregion_present(void) |
2100 | { | |
c6996bdd | 2101 | int opregion = 0; |
74a365b3 MG |
2102 | struct pci_dev *dev = NULL; |
2103 | u32 address; | |
2104 | ||
2105 | for_each_pci_dev(dev) { | |
2106 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2107 | continue; | |
2108 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2109 | continue; | |
c6996bdd AC |
2110 | /* We don't want to poke around undefined i740 registers */ |
2111 | if (is_i740(dev)) | |
2112 | continue; | |
74a365b3 MG |
2113 | pci_read_config_dword(dev, 0xfc, &address); |
2114 | if (!address) | |
2115 | continue; | |
c6996bdd | 2116 | opregion = 1; |
74a365b3 | 2117 | } |
c6996bdd | 2118 | return opregion; |
74a365b3 MG |
2119 | } |
2120 | ||
cecf3e3e | 2121 | /* Check if the chassis-type indicates there is no builtin LCD panel */ |
53fa1f6e HG |
2122 | static bool dmi_is_desktop(void) |
2123 | { | |
2124 | const char *chassis_type; | |
cecf3e3e | 2125 | unsigned long type; |
53fa1f6e HG |
2126 | |
2127 | chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE); | |
2128 | if (!chassis_type) | |
2129 | return false; | |
2130 | ||
cecf3e3e HG |
2131 | if (kstrtoul(chassis_type, 10, &type) != 0) |
2132 | return false; | |
2133 | ||
2134 | switch (type) { | |
2135 | case 0x03: /* Desktop */ | |
2136 | case 0x04: /* Low Profile Desktop */ | |
2137 | case 0x05: /* Pizza Box */ | |
2138 | case 0x06: /* Mini Tower */ | |
2139 | case 0x07: /* Tower */ | |
d693c008 | 2140 | case 0x10: /* Lunch Box */ |
cecf3e3e | 2141 | case 0x11: /* Main Server Chassis */ |
53fa1f6e | 2142 | return true; |
cecf3e3e | 2143 | } |
53fa1f6e HG |
2144 | |
2145 | return false; | |
2146 | } | |
2147 | ||
81cc7e99 HG |
2148 | /* |
2149 | * We're seeing a lot of bogus backlight interfaces on newer machines | |
2150 | * without a LCD such as desktops, servers and HDMI sticks. Checking the | |
2151 | * lcd flag fixes this, enable this by default on any machines which are: | |
2152 | * 1. Win8 ready (where we also prefer the native backlight driver, so | |
2153 | * normally the acpi_video code should not register there anyways); *and* | |
2154 | * 2.1 Report a desktop/server DMI chassis-type, or | |
2155 | * 2.2 Are an ACPI-reduced-hardware platform (and thus won't use the EC for | |
2156 | backlight control) | |
2157 | */ | |
2158 | static bool should_check_lcd_flag(void) | |
2159 | { | |
2160 | if (!acpi_osi_is_win8()) | |
2161 | return false; | |
2162 | ||
2163 | if (dmi_is_desktop()) | |
2164 | return true; | |
2165 | ||
2166 | if (acpi_reduced_hardware()) | |
2167 | return true; | |
2168 | ||
2169 | return false; | |
2170 | } | |
2171 | ||
8e5c2b77 | 2172 | int acpi_video_register(void) |
1da177e4 | 2173 | { |
2a8b18e9 | 2174 | int ret = 0; |
28d63403 | 2175 | |
970530cd HG |
2176 | mutex_lock(®ister_count_mutex); |
2177 | if (register_count) { | |
86e437f0 | 2178 | /* |
8e5c2b77 | 2179 | * if the function of acpi_video_register is already called, |
cbf6d033 | 2180 | * don't register the acpi_video_bus again and return no error. |
86e437f0 | 2181 | */ |
2a8b18e9 | 2182 | goto leave; |
86e437f0 | 2183 | } |
1da177e4 | 2184 | |
81cc7e99 HG |
2185 | if (only_lcd == -1) |
2186 | only_lcd = should_check_lcd_flag(); | |
5928c281 | 2187 | |
7ee33baa HG |
2188 | dmi_check_system(video_dmi_table); |
2189 | ||
28d63403 CW |
2190 | ret = acpi_bus_register_driver(&acpi_video_bus); |
2191 | if (ret) | |
2a8b18e9 | 2192 | goto leave; |
1da177e4 | 2193 | |
86e437f0 ZY |
2194 | /* |
2195 | * When the acpi_video_bus is loaded successfully, increase | |
2196 | * the counter reference. | |
2197 | */ | |
970530cd | 2198 | register_count = 1; |
86e437f0 | 2199 | |
2a8b18e9 | 2200 | leave: |
970530cd | 2201 | mutex_unlock(®ister_count_mutex); |
2a8b18e9 | 2202 | return ret; |
1da177e4 | 2203 | } |
8e5c2b77 | 2204 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2205 | |
86e437f0 ZY |
2206 | void acpi_video_unregister(void) |
2207 | { | |
970530cd HG |
2208 | mutex_lock(®ister_count_mutex); |
2209 | if (register_count) { | |
2a8b18e9 | 2210 | acpi_bus_unregister_driver(&acpi_video_bus); |
970530cd | 2211 | register_count = 0; |
5ad26161 | 2212 | may_report_brightness_keys = false; |
86e437f0 | 2213 | } |
970530cd | 2214 | mutex_unlock(®ister_count_mutex); |
86e437f0 ZY |
2215 | } |
2216 | EXPORT_SYMBOL(acpi_video_unregister); | |
2217 | ||
3dbc80a3 | 2218 | void acpi_video_register_backlight(void) |
1b7f37e1 HG |
2219 | { |
2220 | struct acpi_video_bus *video; | |
2221 | ||
3dbc80a3 HG |
2222 | mutex_lock(&video_list_lock); |
2223 | list_for_each_entry(video, &video_bus_head, entry) | |
2224 | acpi_video_bus_register_backlight(video); | |
2225 | mutex_unlock(&video_list_lock); | |
1b7f37e1 | 2226 | } |
3dbc80a3 | 2227 | EXPORT_SYMBOL(acpi_video_register_backlight); |
1b7f37e1 | 2228 | |
90b066b1 HG |
2229 | bool acpi_video_handles_brightness_key_presses(void) |
2230 | { | |
5ad26161 | 2231 | return may_report_brightness_keys && |
05bc59a0 | 2232 | (report_key_events & REPORT_BRIGHTNESS_KEY_EVENTS); |
90b066b1 HG |
2233 | } |
2234 | EXPORT_SYMBOL(acpi_video_handles_brightness_key_presses); | |
2235 | ||
74a365b3 MG |
2236 | /* |
2237 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2238 | * the video opregion code to be run first in order to initialise | |
2239 | * state before any ACPI video calls are made. To handle this we defer | |
2240 | * registration of the video class until the opregion code has run. | |
2241 | */ | |
2242 | ||
2243 | static int __init acpi_video_init(void) | |
2244 | { | |
6e17cb12 CW |
2245 | /* |
2246 | * Let the module load even if ACPI is disabled (e.g. due to | |
2247 | * a broken BIOS) so that i915.ko can still be loaded on such | |
2248 | * old systems without an AcpiOpRegion. | |
2249 | * | |
2250 | * acpi_video_register() will report -ENODEV later as well due | |
2251 | * to acpi_disabled when i915.ko tries to register itself afterwards. | |
2252 | */ | |
2253 | if (acpi_disabled) | |
2254 | return 0; | |
2255 | ||
74a365b3 MG |
2256 | if (intel_opregion_present()) |
2257 | return 0; | |
2258 | ||
2259 | return acpi_video_register(); | |
2260 | } | |
1da177e4 | 2261 | |
86e437f0 | 2262 | static void __exit acpi_video_exit(void) |
1da177e4 | 2263 | { |
86e437f0 | 2264 | acpi_video_unregister(); |
1da177e4 LT |
2265 | } |
2266 | ||
2267 | module_init(acpi_video_init); | |
2268 | module_exit(acpi_video_exit); |