Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> | |
5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
7 | * |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/list.h> | |
bbac81f5 | 32 | #include <linux/mutex.h> |
e9dab196 | 33 | #include <linux/input.h> |
2f3d000a | 34 | #include <linux/backlight.h> |
702ed512 | 35 | #include <linux/thermal.h> |
935e5f29 | 36 | #include <linux/sort.h> |
74a365b3 MG |
37 | #include <linux/pci.h> |
38 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
eb27cae8 | 40 | #include <linux/dmi.h> |
ac7729da | 41 | #include <linux/suspend.h> |
8b48463f | 42 | #include <linux/acpi.h> |
e92a7162 | 43 | #include <acpi/video.h> |
8b48463f | 44 | #include <asm/uaccess.h> |
1da177e4 | 45 | |
8c5bd7ad RW |
46 | #include "internal.h" |
47 | ||
1da177e4 LT |
48 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
49 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
50 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
51 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
52 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
53 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
54 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
55 | ||
f4715189 TT |
56 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
57 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
58 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
59 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
60 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 61 | |
2f3d000a | 62 | #define MAX_NAME_LEN 20 |
1da177e4 | 63 | |
1da177e4 | 64 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 65 | ACPI_MODULE_NAME("video"); |
1da177e4 | 66 | |
f52fd66d | 67 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 68 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
69 | MODULE_LICENSE("GPL"); |
70 | ||
2843768b | 71 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
72 | module_param(brightness_switch_enabled, bool, 0644); |
73 | ||
c504f8cb ZR |
74 | /* |
75 | * By default, we don't allow duplicate ACPI video bus devices | |
76 | * under the same VGA controller | |
77 | */ | |
90ab5ee9 | 78 | static bool allow_duplicates; |
c504f8cb ZR |
79 | module_param(allow_duplicates, bool, 0644); |
80 | ||
fbc9fe1b | 81 | /* |
0e9f81d3 AL |
82 | * For Windows 8 systems: used to decide if video module |
83 | * should skip registering backlight interface of its own. | |
fbc9fe1b | 84 | */ |
25294e9f | 85 | static int use_native_backlight_param = -1; |
0e9f81d3 | 86 | module_param_named(use_native_backlight, use_native_backlight_param, int, 0444); |
25294e9f | 87 | static bool use_native_backlight_dmi = true; |
fbc9fe1b | 88 | |
915ea7e4 | 89 | static int register_count; |
67b662e1 AL |
90 | static struct mutex video_list_lock; |
91 | static struct list_head video_bus_head; | |
4be44fcd | 92 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 93 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 94 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 95 | |
1ba90e3a TR |
96 | static const struct acpi_device_id video_device_ids[] = { |
97 | {ACPI_VIDEO_HID, 0}, | |
98 | {"", 0}, | |
99 | }; | |
100 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
101 | ||
1da177e4 | 102 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 103 | .name = "video", |
1da177e4 | 104 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 105 | .ids = video_device_ids, |
1da177e4 LT |
106 | .ops = { |
107 | .add = acpi_video_bus_add, | |
108 | .remove = acpi_video_bus_remove, | |
7015558f | 109 | .notify = acpi_video_bus_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | struct acpi_video_bus_flags { | |
4be44fcd LB |
114 | u8 multihead:1; /* can switch video heads */ |
115 | u8 rom:1; /* can retrieve a video rom */ | |
116 | u8 post:1; /* can configure the head to */ | |
117 | u8 reserved:5; | |
1da177e4 LT |
118 | }; |
119 | ||
120 | struct acpi_video_bus_cap { | |
21fcb34e FC |
121 | u8 _DOS:1; /* Enable/Disable output switching */ |
122 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
123 | u8 _ROM:1; /* Get ROM Data */ | |
124 | u8 _GPD:1; /* Get POST Device */ | |
125 | u8 _SPD:1; /* Set POST Device */ | |
126 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 127 | u8 reserved:2; |
1da177e4 LT |
128 | }; |
129 | ||
4be44fcd LB |
130 | struct acpi_video_device_attrib { |
131 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
132 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
133 | u32 display_type:4; /* Describe the specific type in use */ | |
134 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
135 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
136 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 137 | the VGA device. */ |
21fcb34e FC |
138 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
139 | u32 reserved:10; /* Must be 0 */ | |
140 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_video_enumerated_device { | |
144 | union { | |
145 | u32 int_val; | |
4be44fcd | 146 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
147 | } value; |
148 | struct acpi_video_device *bind_info; | |
149 | }; | |
150 | ||
151 | struct acpi_video_bus { | |
e6afa0de | 152 | struct acpi_device *device; |
99678ed7 | 153 | bool backlight_registered; |
53a92ba7 | 154 | bool backlight_notifier_registered; |
4be44fcd | 155 | u8 dos_setting; |
1da177e4 | 156 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd | 157 | u8 attached_count; |
b4df4636 | 158 | u8 child_count; |
4be44fcd | 159 | struct acpi_video_bus_cap cap; |
1da177e4 | 160 | struct acpi_video_bus_flags flags; |
4be44fcd | 161 | struct list_head video_device_list; |
bbac81f5 | 162 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 163 | struct list_head entry; |
e9dab196 LY |
164 | struct input_dev *input; |
165 | char phys[32]; /* for input device */ | |
ac7729da | 166 | struct notifier_block pm_nb; |
53a92ba7 | 167 | struct notifier_block backlight_nb; |
1da177e4 LT |
168 | }; |
169 | ||
170 | struct acpi_video_device_flags { | |
4be44fcd LB |
171 | u8 crt:1; |
172 | u8 lcd:1; | |
173 | u8 tvout:1; | |
82cae999 | 174 | u8 dvi:1; |
4be44fcd LB |
175 | u8 bios:1; |
176 | u8 unknown:1; | |
91e13aa3 AL |
177 | u8 notify:1; |
178 | u8 reserved:1; | |
1da177e4 LT |
179 | }; |
180 | ||
181 | struct acpi_video_device_cap { | |
21fcb34e FC |
182 | u8 _ADR:1; /* Return the unique ID */ |
183 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
184 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 185 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 186 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 187 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
188 | }; |
189 | ||
d32f6947 ZR |
190 | struct acpi_video_brightness_flags { |
191 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 192 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 193 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
194 | }; |
195 | ||
1da177e4 | 196 | struct acpi_video_device_brightness { |
4be44fcd LB |
197 | int curr; |
198 | int count; | |
199 | int *levels; | |
d32f6947 | 200 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
201 | }; |
202 | ||
203 | struct acpi_video_device { | |
4be44fcd LB |
204 | unsigned long device_id; |
205 | struct acpi_video_device_flags flags; | |
206 | struct acpi_video_device_cap cap; | |
207 | struct list_head entry; | |
8ab58e8e LT |
208 | struct delayed_work switch_brightness_work; |
209 | int switch_brightness_event; | |
4be44fcd LB |
210 | struct acpi_video_bus *video; |
211 | struct acpi_device *dev; | |
1da177e4 | 212 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 213 | struct backlight_device *backlight; |
4a703a8f | 214 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
215 | }; |
216 | ||
b7171ae7 | 217 | static const char device_decode[][30] = { |
1da177e4 LT |
218 | "motherboard VGA device", |
219 | "PCI VGA device", | |
220 | "AGP VGA device", | |
221 | "UNKNOWN", | |
222 | }; | |
223 | ||
4be44fcd LB |
224 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
225 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
226 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
227 | struct acpi_video_device *device); | |
1da177e4 | 228 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
229 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
230 | int level); | |
231 | static int acpi_video_device_lcd_get_level_current( | |
232 | struct acpi_video_device *device, | |
a89803df | 233 | unsigned long long *level, bool raw); |
4be44fcd LB |
234 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
235 | u32 level_current, u32 event); | |
8ab58e8e | 236 | static void acpi_video_switch_brightness(struct work_struct *work); |
1da177e4 | 237 | |
0e9f81d3 AL |
238 | static bool acpi_video_use_native_backlight(void) |
239 | { | |
240 | if (use_native_backlight_param != -1) | |
241 | return use_native_backlight_param; | |
242 | else | |
243 | return use_native_backlight_dmi; | |
244 | } | |
245 | ||
0b9f7d93 | 246 | bool acpi_video_verify_backlight_support(void) |
fbc9fe1b | 247 | { |
0e9f81d3 | 248 | if (acpi_osi_is_win8() && acpi_video_use_native_backlight() && |
fbc9fe1b AL |
249 | backlight_device_registered(BACKLIGHT_RAW)) |
250 | return false; | |
251 | return acpi_video_backlight_support(); | |
252 | } | |
0b9f7d93 | 253 | EXPORT_SYMBOL_GPL(acpi_video_verify_backlight_support); |
fbc9fe1b | 254 | |
21fcb34e | 255 | /* backlight device sysfs support */ |
2f3d000a YL |
256 | static int acpi_video_get_brightness(struct backlight_device *bd) |
257 | { | |
27663c58 | 258 | unsigned long long cur_level; |
38531e6f | 259 | int i; |
7c364e79 | 260 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 261 | |
a89803df | 262 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 263 | return -EINVAL; |
38531e6f MG |
264 | for (i = 2; i < vd->brightness->count; i++) { |
265 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
266 | /* |
267 | * The first two entries are special - see page 575 | |
268 | * of the ACPI spec 3.0 | |
269 | */ | |
915ea7e4 | 270 | return i - 2; |
38531e6f MG |
271 | } |
272 | return 0; | |
2f3d000a YL |
273 | } |
274 | ||
275 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
276 | { | |
24450c7a | 277 | int request_level = bd->props.brightness + 2; |
7c364e79 | 278 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a | 279 | |
8ab58e8e | 280 | cancel_delayed_work(&vd->switch_brightness_work); |
24450c7a ZR |
281 | return acpi_video_device_lcd_set_level(vd, |
282 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
283 | } |
284 | ||
acc2472e | 285 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
286 | .get_brightness = acpi_video_get_brightness, |
287 | .update_status = acpi_video_set_brightness, | |
288 | }; | |
289 | ||
702ed512 | 290 | /* thermal cooling device callbacks */ |
4a703a8f | 291 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 292 | long *state) |
702ed512 | 293 | { |
4a703a8f | 294 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
295 | struct acpi_video_device *video = acpi_driver_data(device); |
296 | ||
6503e5df MG |
297 | *state = video->brightness->count - 3; |
298 | return 0; | |
702ed512 ZR |
299 | } |
300 | ||
4a703a8f | 301 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 302 | long *state) |
702ed512 | 303 | { |
4a703a8f | 304 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 305 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 306 | unsigned long long level; |
6503e5df | 307 | int offset; |
702ed512 | 308 | |
a89803df | 309 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 310 | return -EINVAL; |
6503e5df MG |
311 | for (offset = 2; offset < video->brightness->count; offset++) |
312 | if (level == video->brightness->levels[offset]) { | |
313 | *state = video->brightness->count - offset - 1; | |
314 | return 0; | |
315 | } | |
702ed512 ZR |
316 | |
317 | return -EINVAL; | |
318 | } | |
319 | ||
320 | static int | |
4a703a8f | 321 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 322 | { |
4a703a8f | 323 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
324 | struct acpi_video_device *video = acpi_driver_data(device); |
325 | int level; | |
326 | ||
915ea7e4 | 327 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
328 | return -EINVAL; |
329 | ||
330 | state = video->brightness->count - state; | |
915ea7e4 | 331 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
332 | return acpi_video_device_lcd_set_level(video, level); |
333 | } | |
334 | ||
9c8b04be | 335 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
336 | .get_max_state = video_get_max_state, |
337 | .get_cur_state = video_get_cur_state, | |
338 | .set_cur_state = video_set_cur_state, | |
339 | }; | |
340 | ||
21fcb34e FC |
341 | /* |
342 | * -------------------------------------------------------------------------- | |
343 | * Video Management | |
344 | * -------------------------------------------------------------------------- | |
345 | */ | |
1da177e4 | 346 | |
1da177e4 | 347 | static int |
4be44fcd LB |
348 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
349 | union acpi_object **levels) | |
1da177e4 | 350 | { |
4be44fcd LB |
351 | int status; |
352 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
353 | union acpi_object *obj; | |
1da177e4 | 354 | |
1da177e4 LT |
355 | |
356 | *levels = NULL; | |
357 | ||
90130268 | 358 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 359 | if (!ACPI_SUCCESS(status)) |
d550d98d | 360 | return status; |
4be44fcd | 361 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 362 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 363 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
364 | status = -EFAULT; |
365 | goto err; | |
366 | } | |
367 | ||
368 | *levels = obj; | |
369 | ||
d550d98d | 370 | return 0; |
1da177e4 | 371 | |
915ea7e4 | 372 | err: |
6044ec88 | 373 | kfree(buffer.pointer); |
1da177e4 | 374 | |
d550d98d | 375 | return status; |
1da177e4 LT |
376 | } |
377 | ||
378 | static int | |
4be44fcd | 379 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 380 | { |
24450c7a | 381 | int status; |
9e6dada9 | 382 | int state; |
1da177e4 | 383 | |
0db98202 JL |
384 | status = acpi_execute_simple_method(device->dev->handle, |
385 | "_BCM", level); | |
24450c7a ZR |
386 | if (ACPI_FAILURE(status)) { |
387 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
388 | return -EIO; | |
389 | } | |
390 | ||
4500ca8e | 391 | device->brightness->curr = level; |
9e6dada9 | 392 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 393 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
394 | if (device->backlight) |
395 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
396 | return 0; |
397 | } | |
9e6dada9 | 398 | |
24450c7a ZR |
399 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
400 | return -EINVAL; | |
1da177e4 LT |
401 | } |
402 | ||
45cb50e6 ZR |
403 | /* |
404 | * For some buggy _BQC methods, we need to add a constant value to | |
405 | * the _BQC return value to get the actual current brightness level | |
406 | */ | |
407 | ||
408 | static int bqc_offset_aml_bug_workaround; | |
409 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
410 | { | |
411 | bqc_offset_aml_bug_workaround = 9; | |
412 | return 0; | |
413 | } | |
414 | ||
5f24079b HG |
415 | static int __init video_disable_native_backlight(const struct dmi_system_id *d) |
416 | { | |
417 | use_native_backlight_dmi = false; | |
418 | return 0; | |
419 | } | |
420 | ||
45cb50e6 ZR |
421 | static struct dmi_system_id video_dmi_table[] __initdata = { |
422 | /* | |
423 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
424 | */ | |
425 | { | |
426 | .callback = video_set_bqc_offset, | |
427 | .ident = "Acer Aspire 5720", | |
428 | .matches = { | |
429 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
430 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
431 | }, | |
432 | }, | |
5afc4abe LB |
433 | { |
434 | .callback = video_set_bqc_offset, | |
435 | .ident = "Acer Aspire 5710Z", | |
436 | .matches = { | |
437 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
438 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
439 | }, | |
440 | }, | |
34ac272b ZR |
441 | { |
442 | .callback = video_set_bqc_offset, | |
443 | .ident = "eMachines E510", | |
444 | .matches = { | |
445 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
446 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
447 | }, | |
448 | }, | |
93bcece2 ZR |
449 | { |
450 | .callback = video_set_bqc_offset, | |
451 | .ident = "Acer Aspire 5315", | |
452 | .matches = { | |
453 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
454 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
455 | }, | |
456 | }, | |
152a4e63 ZR |
457 | { |
458 | .callback = video_set_bqc_offset, | |
459 | .ident = "Acer Aspire 7720", | |
460 | .matches = { | |
461 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
462 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
463 | }, | |
464 | }, | |
5f24079b HG |
465 | |
466 | /* | |
467 | * These models have a working acpi_video backlight control, and using | |
468 | * native backlight causes a regression where backlight does not work | |
469 | * when userspace is not handling brightness key events. Disable | |
470 | * native_backlight on these to fix this: | |
471 | * https://bugzilla.kernel.org/show_bug.cgi?id=81691 | |
472 | */ | |
473 | { | |
474 | .callback = video_disable_native_backlight, | |
475 | .ident = "ThinkPad T420", | |
476 | .matches = { | |
477 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
478 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"), | |
479 | }, | |
480 | }, | |
481 | { | |
482 | .callback = video_disable_native_backlight, | |
483 | .ident = "ThinkPad T520", | |
484 | .matches = { | |
485 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
486 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"), | |
487 | }, | |
488 | }, | |
789eeea1 AL |
489 | { |
490 | .callback = video_disable_native_backlight, | |
491 | .ident = "ThinkPad X201s", | |
492 | .matches = { | |
493 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
494 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), | |
495 | }, | |
496 | }, | |
84c34858 HG |
497 | |
498 | /* The native backlight controls do not work on some older machines */ | |
499 | { | |
500 | /* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */ | |
501 | .callback = video_disable_native_backlight, | |
502 | .ident = "HP ENVY 15 Notebook", | |
503 | .matches = { | |
504 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
505 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"), | |
506 | }, | |
507 | }, | |
7d0b9349 AL |
508 | |
509 | { | |
510 | .callback = video_disable_native_backlight, | |
511 | .ident = "SAMSUNG 870Z5E/880Z5E/680Z5E", | |
512 | .matches = { | |
513 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
514 | DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"), | |
515 | }, | |
516 | }, | |
517 | { | |
518 | .callback = video_disable_native_backlight, | |
519 | .ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V", | |
520 | .matches = { | |
521 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), | |
522 | DMI_MATCH(DMI_PRODUCT_NAME, "370R4E/370R4V/370R5E/3570RE/370R5V"), | |
523 | }, | |
524 | }, | |
6a3ef10b HG |
525 | |
526 | { | |
527 | /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */ | |
528 | .callback = video_disable_native_backlight, | |
529 | .ident = "Dell XPS15 L521X", | |
530 | .matches = { | |
531 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
532 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), | |
533 | }, | |
534 | }, | |
45cb50e6 ZR |
535 | {} |
536 | }; | |
537 | ||
994fa63c DB |
538 | static unsigned long long |
539 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
540 | unsigned long long bqc_value) | |
541 | { | |
542 | unsigned long long level; | |
543 | ||
544 | if (device->brightness->flags._BQC_use_index) { | |
545 | /* | |
546 | * _BQC returns an index that doesn't account for | |
547 | * the first 2 items with special meaning, so we need | |
548 | * to compensate for that by offsetting ourselves | |
549 | */ | |
550 | if (device->brightness->flags._BCL_reversed) | |
551 | bqc_value = device->brightness->count - 3 - bqc_value; | |
552 | ||
553 | level = device->brightness->levels[bqc_value + 2]; | |
554 | } else { | |
555 | level = bqc_value; | |
556 | } | |
557 | ||
558 | level += bqc_offset_aml_bug_workaround; | |
559 | ||
560 | return level; | |
561 | } | |
562 | ||
1da177e4 | 563 | static int |
4be44fcd | 564 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 565 | unsigned long long *level, bool raw) |
1da177e4 | 566 | { |
c8890f90 | 567 | acpi_status status = AE_OK; |
4e231fa4 | 568 | int i; |
c8890f90 | 569 | |
c60d638e ZR |
570 | if (device->cap._BQC || device->cap._BCQ) { |
571 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
572 | ||
573 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
574 | NULL, level); |
575 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
576 | if (raw) { |
577 | /* | |
578 | * Caller has indicated he wants the raw | |
579 | * value returned by _BQC, so don't furtherly | |
580 | * mess with the value. | |
581 | */ | |
582 | return 0; | |
583 | } | |
584 | ||
994fa63c | 585 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 586 | |
4e231fa4 VS |
587 | for (i = 2; i < device->brightness->count; i++) |
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 | |
730 | * through _BQC, we need to test another value for them. | |
731 | */ | |
b3b301c5 | 732 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
733 | |
734 | result = acpi_video_device_lcd_set_level(device, test_level); | |
735 | if (result) | |
736 | return result; | |
737 | ||
738 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
739 | if (result) | |
740 | return result; | |
741 | ||
742 | if (level != test_level) { | |
743 | /* buggy _BQC found, need to find out if it uses index */ | |
744 | if (level < br->count) { | |
745 | if (br->flags._BCL_reversed) | |
746 | level = br->count - 3 - level; | |
747 | if (br->levels[level + 2] == test_level) | |
748 | br->flags._BQC_use_index = 1; | |
749 | } | |
750 | ||
751 | if (!br->flags._BQC_use_index) | |
752 | device->cap._BQC = device->cap._BCQ = 0; | |
753 | } | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
758 | ||
1da177e4 | 759 | /* |
21fcb34e FC |
760 | * Arg: |
761 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
762 | * |
763 | * Return Value: | |
469778c1 JJ |
764 | * Maximum brightness level |
765 | * | |
766 | * Allocate and initialize device->brightness. | |
767 | */ | |
768 | ||
769 | static int | |
770 | acpi_video_init_brightness(struct acpi_video_device *device) | |
771 | { | |
772 | union acpi_object *obj = NULL; | |
d32f6947 | 773 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 774 | unsigned long long level, level_old; |
469778c1 JJ |
775 | union acpi_object *o; |
776 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 777 | int result = -EINVAL; |
bd8ba205 | 778 | u32 value; |
469778c1 JJ |
779 | |
780 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
781 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
782 | "LCD brightness level\n")); | |
783 | goto out; | |
784 | } | |
785 | ||
786 | if (obj->package.count < 2) | |
787 | goto out; | |
788 | ||
789 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
790 | if (!br) { | |
791 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 792 | result = -ENOMEM; |
469778c1 JJ |
793 | goto out; |
794 | } | |
795 | ||
d32f6947 | 796 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 797 | GFP_KERNEL); |
1a7c618a ZR |
798 | if (!br->levels) { |
799 | result = -ENOMEM; | |
469778c1 | 800 | goto out_free; |
1a7c618a | 801 | } |
469778c1 JJ |
802 | |
803 | for (i = 0; i < obj->package.count; i++) { | |
804 | o = (union acpi_object *)&obj->package.elements[i]; | |
805 | if (o->type != ACPI_TYPE_INTEGER) { | |
806 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
807 | continue; | |
808 | } | |
bd8ba205 HG |
809 | value = (u32) o->integer.value; |
810 | /* Skip duplicate entries */ | |
811 | if (count > 2 && br->levels[count - 1] == value) | |
812 | continue; | |
813 | ||
814 | br->levels[count] = value; | |
469778c1 JJ |
815 | |
816 | if (br->levels[count] > max_level) | |
817 | max_level = br->levels[count]; | |
818 | count++; | |
819 | } | |
820 | ||
d32f6947 ZR |
821 | /* |
822 | * some buggy BIOS don't export the levels | |
823 | * when machine is on AC/Battery in _BCL package. | |
824 | * In this case, the first two elements in _BCL packages | |
825 | * are also supported brightness levels that OS should take care of. | |
826 | */ | |
90af2cf6 ZR |
827 | for (i = 2; i < count; i++) { |
828 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 829 | level_ac_battery++; |
90af2cf6 ZR |
830 | if (br->levels[i] == br->levels[1]) |
831 | level_ac_battery++; | |
832 | } | |
d32f6947 ZR |
833 | |
834 | if (level_ac_battery < 2) { | |
835 | level_ac_battery = 2 - level_ac_battery; | |
836 | br->flags._BCL_no_ac_battery_levels = 1; | |
837 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
838 | br->levels[i] = br->levels[i - level_ac_battery]; | |
839 | count += level_ac_battery; | |
840 | } else if (level_ac_battery > 2) | |
bf6787eb | 841 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 842 | |
d80fb99f ZR |
843 | /* Check if the _BCL package is in a reversed order */ |
844 | if (max_level == br->levels[2]) { | |
845 | br->flags._BCL_reversed = 1; | |
846 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
847 | acpi_video_cmp_level, NULL); | |
848 | } else if (max_level != br->levels[count - 1]) | |
849 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 850 | "Found unordered _BCL package")); |
469778c1 JJ |
851 | |
852 | br->count = count; | |
853 | device->brightness = br; | |
1a7c618a | 854 | |
1a7c618a | 855 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 856 | br->curr = level = max_level; |
e047cca6 ZR |
857 | |
858 | if (!device->cap._BQC) | |
859 | goto set_level; | |
860 | ||
a89803df DB |
861 | result = acpi_video_device_lcd_get_level_current(device, |
862 | &level_old, true); | |
1a7c618a ZR |
863 | if (result) |
864 | goto out_free_levels; | |
865 | ||
a50188da | 866 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
867 | if (result) |
868 | goto out_free_levels; | |
a50188da AL |
869 | /* |
870 | * cap._BQC may get cleared due to _BQC is found to be broken | |
871 | * in acpi_video_bqc_quirk, so check again here. | |
872 | */ | |
873 | if (!device->cap._BQC) | |
874 | goto set_level; | |
e047cca6 | 875 | |
545ef368 AL |
876 | level = acpi_video_bqc_value_to_level(device, level_old); |
877 | /* | |
878 | * On some buggy laptops, _BQC returns an uninitialized | |
879 | * value when invoked for the first time, i.e. | |
880 | * level_old is invalid (no matter whether it's a level | |
881 | * or an index). Set the backlight to max_level in this case. | |
882 | */ | |
883 | for (i = 2; i < br->count; i++) | |
884 | if (level == br->levels[i]) | |
885 | break; | |
886 | if (i == br->count || !level) | |
887 | level = max_level; | |
e047cca6 | 888 | |
e047cca6 | 889 | set_level: |
90c53ca4 | 890 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
891 | if (result) |
892 | goto out_free_levels; | |
1a7c618a | 893 | |
d32f6947 ZR |
894 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
895 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 896 | kfree(obj); |
1a7c618a | 897 | return result; |
469778c1 JJ |
898 | |
899 | out_free_levels: | |
900 | kfree(br->levels); | |
901 | out_free: | |
902 | kfree(br); | |
903 | out: | |
904 | device->brightness = NULL; | |
905 | kfree(obj); | |
1a7c618a | 906 | return result; |
469778c1 JJ |
907 | } |
908 | ||
909 | /* | |
910 | * Arg: | |
911 | * device : video output device (LCD, CRT, ..) | |
912 | * | |
913 | * Return Value: | |
21fcb34e | 914 | * None |
1da177e4 | 915 | * |
98fb8fe1 | 916 | * Find out all required AML methods defined under the output |
1da177e4 LT |
917 | * device. |
918 | */ | |
919 | ||
4be44fcd | 920 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 921 | { |
952c63e9 | 922 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 923 | device->cap._ADR = 1; |
952c63e9 | 924 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 925 | device->cap._BCL = 1; |
952c63e9 | 926 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 927 | device->cap._BCM = 1; |
952c63e9 | 928 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 929 | device->cap._BQC = 1; |
952c63e9 | 930 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
931 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
932 | device->cap._BCQ = 1; | |
933 | } | |
934 | ||
952c63e9 | 935 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 936 | device->cap._DDC = 1; |
1da177e4 LT |
937 | } |
938 | ||
939 | /* | |
21fcb34e FC |
940 | * Arg: |
941 | * device : video output device (VGA) | |
1da177e4 LT |
942 | * |
943 | * Return Value: | |
21fcb34e | 944 | * None |
1da177e4 | 945 | * |
98fb8fe1 | 946 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
947 | */ |
948 | ||
4be44fcd | 949 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 950 | { |
952c63e9 | 951 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 952 | video->cap._DOS = 1; |
952c63e9 | 953 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 954 | video->cap._DOD = 1; |
952c63e9 | 955 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 956 | video->cap._ROM = 1; |
952c63e9 | 957 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 958 | video->cap._GPD = 1; |
952c63e9 | 959 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 960 | video->cap._SPD = 1; |
952c63e9 | 961 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 962 | video->cap._VPO = 1; |
1da177e4 LT |
963 | } |
964 | ||
965 | /* | |
966 | * Check whether the video bus device has required AML method to | |
967 | * support the desired features | |
968 | */ | |
969 | ||
4be44fcd | 970 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 971 | { |
4be44fcd | 972 | acpi_status status = -ENOENT; |
1e4cffe7 | 973 | struct pci_dev *dev; |
1da177e4 LT |
974 | |
975 | if (!video) | |
d550d98d | 976 | return -EINVAL; |
1da177e4 | 977 | |
1e4cffe7 | 978 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
979 | if (!dev) |
980 | return -ENODEV; | |
1e4cffe7 | 981 | pci_dev_put(dev); |
22c13f9d | 982 | |
21fcb34e FC |
983 | /* |
984 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
985 | * to check well known required nodes. |
986 | */ | |
987 | ||
98fb8fe1 | 988 | /* Does this device support video switching? */ |
3a1151e3 SB |
989 | if (video->cap._DOS || video->cap._DOD) { |
990 | if (!video->cap._DOS) { | |
991 | printk(KERN_WARNING FW_BUG | |
992 | "ACPI(%s) defines _DOD but not _DOS\n", | |
993 | acpi_device_bid(video->device)); | |
994 | } | |
1da177e4 LT |
995 | video->flags.multihead = 1; |
996 | status = 0; | |
997 | } | |
998 | ||
98fb8fe1 | 999 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1000 | if (video->cap._ROM) { |
1da177e4 LT |
1001 | video->flags.rom = 1; |
1002 | status = 0; | |
1003 | } | |
1004 | ||
98fb8fe1 | 1005 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1006 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1007 | video->flags.post = 1; |
1008 | status = 0; | |
1009 | } | |
1010 | ||
d550d98d | 1011 | return status; |
1da177e4 LT |
1012 | } |
1013 | ||
21fcb34e FC |
1014 | /* |
1015 | * -------------------------------------------------------------------------- | |
1016 | * Driver Interface | |
1017 | * -------------------------------------------------------------------------- | |
1018 | */ | |
1da177e4 LT |
1019 | |
1020 | /* device interface */ | |
915ea7e4 | 1021 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1022 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1023 | { | |
78eed028 DT |
1024 | struct acpi_video_enumerated_device *ids; |
1025 | int i; | |
1026 | ||
1027 | for (i = 0; i < video->attached_count; i++) { | |
1028 | ids = &video->attached_array[i]; | |
1029 | if ((ids->value.int_val & 0xffff) == device_id) | |
1030 | return &ids->value.attrib; | |
1031 | } | |
82cae999 | 1032 | |
82cae999 RZ |
1033 | return NULL; |
1034 | } | |
1da177e4 | 1035 | |
e92a7162 MG |
1036 | static int |
1037 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1038 | unsigned long device_id) | |
1039 | { | |
1040 | struct acpi_video_enumerated_device *ids; | |
1041 | int i; | |
1042 | ||
1043 | for (i = 0; i < video->attached_count; i++) { | |
1044 | ids = &video->attached_array[i]; | |
1045 | if ((ids->value.int_val & 0xffff) == device_id) | |
1046 | return ids->value.int_val; | |
1047 | } | |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
1da177e4 | 1052 | static int |
4be44fcd LB |
1053 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1054 | struct acpi_video_bus *video) | |
1da177e4 | 1055 | { |
27663c58 | 1056 | unsigned long long device_id; |
e92a7162 | 1057 | int status, device_type; |
4be44fcd | 1058 | struct acpi_video_device *data; |
915ea7e4 | 1059 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1060 | |
4be44fcd LB |
1061 | status = |
1062 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1063 | /* Some device omits _ADR, we skip them instead of fail */ |
1064 | if (ACPI_FAILURE(status)) | |
1065 | return 0; | |
1da177e4 | 1066 | |
91e13aa3 AL |
1067 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1068 | if (!data) | |
1069 | return -ENOMEM; | |
82cae999 | 1070 | |
91e13aa3 AL |
1071 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1072 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1073 | device->driver_data = data; | |
1074 | ||
1075 | data->device_id = device_id; | |
1076 | data->video = video; | |
1077 | data->dev = device; | |
8ab58e8e LT |
1078 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1079 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1080 | |
1081 | attribute = acpi_video_get_device_attr(video, device_id); | |
1082 | ||
915ea7e4 | 1083 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1084 | switch (attribute->display_type) { |
1085 | case ACPI_VIDEO_DISPLAY_CRT: | |
1086 | data->flags.crt = 1; | |
1087 | break; | |
1088 | case ACPI_VIDEO_DISPLAY_TV: | |
1089 | data->flags.tvout = 1; | |
1090 | break; | |
1091 | case ACPI_VIDEO_DISPLAY_DVI: | |
1092 | data->flags.dvi = 1; | |
1093 | break; | |
1094 | case ACPI_VIDEO_DISPLAY_LCD: | |
1095 | data->flags.lcd = 1; | |
1096 | break; | |
1097 | default: | |
1098 | data->flags.unknown = 1; | |
1099 | break; | |
1100 | } | |
915ea7e4 | 1101 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1102 | data->flags.bios = 1; |
1103 | } else { | |
1104 | /* Check for legacy IDs */ | |
1105 | device_type = acpi_video_get_device_type(video, device_id); | |
1106 | /* Ignore bits 16 and 18-20 */ | |
1107 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1108 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1109 | data->flags.crt = 1; | |
1110 | break; | |
1111 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1112 | data->flags.lcd = 1; | |
1113 | break; | |
1114 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1115 | data->flags.tvout = 1; | |
1116 | break; | |
1117 | default: | |
1118 | data->flags.unknown = 1; | |
e92a7162 | 1119 | } |
91e13aa3 | 1120 | } |
4be44fcd | 1121 | |
91e13aa3 AL |
1122 | acpi_video_device_bind(video, data); |
1123 | acpi_video_device_find_cap(data); | |
1da177e4 | 1124 | |
91e13aa3 AL |
1125 | mutex_lock(&video->device_list_lock); |
1126 | list_add_tail(&data->entry, &video->video_device_list); | |
1127 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1128 | |
91e13aa3 | 1129 | return status; |
1da177e4 LT |
1130 | } |
1131 | ||
1132 | /* | |
1133 | * Arg: | |
21fcb34e | 1134 | * video : video bus device |
1da177e4 LT |
1135 | * |
1136 | * Return: | |
21fcb34e FC |
1137 | * none |
1138 | * | |
1139 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1140 | * bind the ids with the corresponding video devices |
1141 | * under the video bus. | |
4be44fcd | 1142 | */ |
1da177e4 | 1143 | |
4be44fcd | 1144 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1145 | { |
ff102ea9 DT |
1146 | struct acpi_video_device *dev; |
1147 | ||
bbac81f5 | 1148 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1149 | |
1150 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1151 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1152 | |
bbac81f5 | 1153 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | /* | |
1157 | * Arg: | |
21fcb34e FC |
1158 | * video : video bus device |
1159 | * device : video output device under the video | |
1160 | * bus | |
1da177e4 LT |
1161 | * |
1162 | * Return: | |
21fcb34e FC |
1163 | * none |
1164 | * | |
1da177e4 LT |
1165 | * Bind the ids with the corresponding video devices |
1166 | * under the video bus. | |
4be44fcd | 1167 | */ |
1da177e4 LT |
1168 | |
1169 | static void | |
4be44fcd LB |
1170 | acpi_video_device_bind(struct acpi_video_bus *video, |
1171 | struct acpi_video_device *device) | |
1da177e4 | 1172 | { |
78eed028 | 1173 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1174 | int i; |
1da177e4 | 1175 | |
78eed028 DT |
1176 | for (i = 0; i < video->attached_count; i++) { |
1177 | ids = &video->attached_array[i]; | |
1178 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1179 | ids->bind_info = device; | |
1da177e4 LT |
1180 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1181 | } | |
1182 | } | |
1da177e4 LT |
1183 | } |
1184 | ||
0b8db271 AL |
1185 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1186 | { | |
1187 | struct acpi_video_bus *video = device->video; | |
1188 | int i; | |
1189 | ||
b4df4636 AL |
1190 | /* |
1191 | * If we have a broken _DOD or we have more than 8 output devices | |
1192 | * under the graphics controller node that we can't proper deal with | |
1193 | * in the operation region code currently, no need to test. | |
1194 | */ | |
1195 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1196 | return true; |
1197 | ||
1198 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1199 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1200 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1201 | return true; |
1202 | } | |
1203 | ||
1204 | return false; | |
1205 | } | |
1206 | ||
1da177e4 LT |
1207 | /* |
1208 | * Arg: | |
21fcb34e | 1209 | * video : video bus device |
1da177e4 LT |
1210 | * |
1211 | * Return: | |
21fcb34e FC |
1212 | * < 0 : error |
1213 | * | |
1da177e4 LT |
1214 | * Call _DOD to enumerate all devices attached to display adapter |
1215 | * | |
4be44fcd | 1216 | */ |
1da177e4 LT |
1217 | |
1218 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1219 | { | |
4be44fcd LB |
1220 | int status; |
1221 | int count; | |
1222 | int i; | |
78eed028 | 1223 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1224 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1225 | union acpi_object *dod = NULL; | |
1226 | union acpi_object *obj; | |
1da177e4 | 1227 | |
90130268 | 1228 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1229 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1230 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1231 | return status; |
1da177e4 LT |
1232 | } |
1233 | ||
50dd0969 | 1234 | dod = buffer.pointer; |
1da177e4 | 1235 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1236 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1237 | status = -EFAULT; |
1238 | goto out; | |
1239 | } | |
1240 | ||
1241 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1242 | dod->package.count)); |
1da177e4 | 1243 | |
78eed028 DT |
1244 | active_list = kcalloc(1 + dod->package.count, |
1245 | sizeof(struct acpi_video_enumerated_device), | |
1246 | GFP_KERNEL); | |
1247 | if (!active_list) { | |
1da177e4 LT |
1248 | status = -ENOMEM; |
1249 | goto out; | |
1250 | } | |
1251 | ||
1252 | count = 0; | |
1253 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1254 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1255 | |
1256 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1257 | printk(KERN_ERR PREFIX |
1258 | "Invalid _DOD data in element %d\n", i); | |
1259 | continue; | |
1da177e4 | 1260 | } |
78eed028 DT |
1261 | |
1262 | active_list[count].value.int_val = obj->integer.value; | |
1263 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1264 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1265 | (int)obj->integer.value)); | |
1da177e4 LT |
1266 | count++; |
1267 | } | |
1da177e4 | 1268 | |
6044ec88 | 1269 | kfree(video->attached_array); |
4be44fcd | 1270 | |
78eed028 | 1271 | video->attached_array = active_list; |
1da177e4 | 1272 | video->attached_count = count; |
78eed028 | 1273 | |
915ea7e4 | 1274 | out: |
02438d87 | 1275 | kfree(buffer.pointer); |
d550d98d | 1276 | return status; |
1da177e4 LT |
1277 | } |
1278 | ||
4be44fcd LB |
1279 | static int |
1280 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1281 | u32 level_current, u32 event) | |
1da177e4 | 1282 | { |
63f0edfc | 1283 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1284 | max = max_below = 0; |
1285 | min = min_above = 255; | |
63f0edfc | 1286 | /* Find closest level to level_current */ |
0a3db1ce | 1287 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1288 | l = device->brightness->levels[i]; |
1289 | if (abs(l - level_current) < abs(delta)) { | |
1290 | delta = l - level_current; | |
1291 | if (!delta) | |
1292 | break; | |
1293 | } | |
1294 | } | |
1295 | /* Ajust level_current to closest available level */ | |
1296 | level_current += delta; | |
0a3db1ce | 1297 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1298 | l = device->brightness->levels[i]; |
1299 | if (l < min) | |
1300 | min = l; | |
1301 | if (l > max) | |
1302 | max = l; | |
1303 | if (l < min_above && l > level_current) | |
1304 | min_above = l; | |
1305 | if (l > max_below && l < level_current) | |
1306 | max_below = l; | |
1307 | } | |
1308 | ||
1309 | switch (event) { | |
1310 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1311 | return (level_current < max) ? min_above : min; | |
1312 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1313 | return (level_current < max) ? min_above : max; | |
1314 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1315 | return (level_current > min) ? max_below : min; | |
1316 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1317 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1318 | return 0; | |
1319 | default: | |
1320 | return level_current; | |
1321 | } | |
1da177e4 LT |
1322 | } |
1323 | ||
8ab58e8e LT |
1324 | static void |
1325 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1326 | { |
8ab58e8e LT |
1327 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1328 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1329 | unsigned long long level_current, level_next; |
8ab58e8e | 1330 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1331 | int result = -EINVAL; |
1332 | ||
fbc9fe1b AL |
1333 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1334 | if (!acpi_video_verify_backlight_support()) | |
8ab58e8e | 1335 | return; |
28c32e99 | 1336 | |
469778c1 | 1337 | if (!device->brightness) |
c8890f90 ZR |
1338 | goto out; |
1339 | ||
1340 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1341 | &level_current, |
1342 | false); | |
c8890f90 ZR |
1343 | if (result) |
1344 | goto out; | |
1345 | ||
1da177e4 | 1346 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1347 | |
24450c7a | 1348 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1349 | |
36342742 MG |
1350 | if (!result) |
1351 | backlight_force_update(device->backlight, | |
1352 | BACKLIGHT_UPDATE_HOTKEY); | |
1353 | ||
c8890f90 ZR |
1354 | out: |
1355 | if (result) | |
1356 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1357 | } |
1358 | ||
e92a7162 MG |
1359 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1360 | void **edid) | |
1361 | { | |
1362 | struct acpi_video_bus *video; | |
1363 | struct acpi_video_device *video_device; | |
1364 | union acpi_object *buffer = NULL; | |
1365 | acpi_status status; | |
1366 | int i, length; | |
1367 | ||
1368 | if (!device || !acpi_driver_data(device)) | |
1369 | return -EINVAL; | |
1370 | ||
1371 | video = acpi_driver_data(device); | |
1372 | ||
1373 | for (i = 0; i < video->attached_count; i++) { | |
1374 | video_device = video->attached_array[i].bind_info; | |
1375 | length = 256; | |
1376 | ||
1377 | if (!video_device) | |
1378 | continue; | |
1379 | ||
82069552 ZR |
1380 | if (!video_device->cap._DDC) |
1381 | continue; | |
1382 | ||
e92a7162 MG |
1383 | if (type) { |
1384 | switch (type) { | |
1385 | case ACPI_VIDEO_DISPLAY_CRT: | |
1386 | if (!video_device->flags.crt) | |
1387 | continue; | |
1388 | break; | |
1389 | case ACPI_VIDEO_DISPLAY_TV: | |
1390 | if (!video_device->flags.tvout) | |
1391 | continue; | |
1392 | break; | |
1393 | case ACPI_VIDEO_DISPLAY_DVI: | |
1394 | if (!video_device->flags.dvi) | |
1395 | continue; | |
1396 | break; | |
1397 | case ACPI_VIDEO_DISPLAY_LCD: | |
1398 | if (!video_device->flags.lcd) | |
1399 | continue; | |
1400 | break; | |
1401 | } | |
1402 | } else if (video_device->device_id != device_id) { | |
1403 | continue; | |
1404 | } | |
1405 | ||
1406 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1407 | ||
1408 | if (ACPI_FAILURE(status) || !buffer || | |
1409 | buffer->type != ACPI_TYPE_BUFFER) { | |
1410 | length = 128; | |
1411 | status = acpi_video_device_EDID(video_device, &buffer, | |
1412 | length); | |
1413 | if (ACPI_FAILURE(status) || !buffer || | |
1414 | buffer->type != ACPI_TYPE_BUFFER) { | |
1415 | continue; | |
1416 | } | |
1417 | } | |
1418 | ||
1419 | *edid = buffer->buffer.pointer; | |
1420 | return length; | |
1421 | } | |
1422 | ||
1423 | return -ENODEV; | |
1424 | } | |
1425 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1426 | ||
1da177e4 | 1427 | static int |
4be44fcd LB |
1428 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1429 | struct acpi_device *device) | |
1da177e4 | 1430 | { |
fba4e087 | 1431 | int status = 0; |
ff102ea9 | 1432 | struct acpi_device *dev; |
1da177e4 | 1433 | |
fba4e087 IM |
1434 | /* |
1435 | * There are systems where video module known to work fine regardless | |
1436 | * of broken _DOD and ignoring returned value here doesn't cause | |
1437 | * any issues later. | |
1438 | */ | |
1439 | acpi_video_device_enumerate(video); | |
1da177e4 | 1440 | |
ff102ea9 | 1441 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1442 | |
1443 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1444 | if (status) { |
91e13aa3 AL |
1445 | dev_err(&dev->dev, "Can't attach device\n"); |
1446 | break; | |
1da177e4 | 1447 | } |
b4df4636 | 1448 | video->child_count++; |
1da177e4 | 1449 | } |
d550d98d | 1450 | return status; |
1da177e4 LT |
1451 | } |
1452 | ||
1da177e4 LT |
1453 | /* acpi_video interface */ |
1454 | ||
efaa14c7 AL |
1455 | /* |
1456 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1457 | * preform any automatic brightness change on receiving a notification. | |
1458 | */ | |
4be44fcd | 1459 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1460 | { |
efaa14c7 | 1461 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1462 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1463 | } |
1464 | ||
4be44fcd | 1465 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1466 | { |
efaa14c7 | 1467 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1468 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1469 | } |
1470 | ||
7015558f | 1471 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1472 | { |
7015558f | 1473 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1474 | struct input_dev *input; |
17c452f9 | 1475 | int keycode = 0; |
e9dab196 | 1476 | |
67b662e1 | 1477 | if (!video || !video->input) |
d550d98d | 1478 | return; |
1da177e4 | 1479 | |
e9dab196 | 1480 | input = video->input; |
1da177e4 LT |
1481 | |
1482 | switch (event) { | |
98fb8fe1 | 1483 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1484 | * most likely via hotkey. */ |
8a37c65d | 1485 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1486 | break; |
1487 | ||
98fb8fe1 | 1488 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1489 | * connector. */ |
1490 | acpi_video_device_enumerate(video); | |
1491 | acpi_video_device_rebind(video); | |
e9dab196 | 1492 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1493 | break; |
1494 | ||
4be44fcd | 1495 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1496 | keycode = KEY_SWITCHVIDEOMODE; |
1497 | break; | |
4be44fcd | 1498 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1499 | keycode = KEY_VIDEO_NEXT; |
1500 | break; | |
4be44fcd | 1501 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1502 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1503 | break; |
1504 | ||
1505 | default: | |
1506 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1507 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1508 | break; |
1509 | } | |
1510 | ||
8a37c65d LT |
1511 | if (acpi_notifier_call_chain(device, event, 0)) |
1512 | /* Something vetoed the keypress. */ | |
1513 | keycode = 0; | |
17c452f9 MG |
1514 | |
1515 | if (keycode) { | |
1516 | input_report_key(input, keycode, 1); | |
1517 | input_sync(input); | |
1518 | input_report_key(input, keycode, 0); | |
1519 | input_sync(input); | |
1520 | } | |
e9dab196 | 1521 | |
d550d98d | 1522 | return; |
1da177e4 LT |
1523 | } |
1524 | ||
8ab58e8e LT |
1525 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1526 | u32 event) | |
1527 | { | |
1528 | if (!brightness_switch_enabled) | |
1529 | return; | |
1530 | ||
1531 | video_device->switch_brightness_event = event; | |
1532 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1533 | } | |
1534 | ||
4be44fcd | 1535 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1536 | { |
50dd0969 | 1537 | struct acpi_video_device *video_device = data; |
4be44fcd | 1538 | struct acpi_device *device = NULL; |
e9dab196 LY |
1539 | struct acpi_video_bus *bus; |
1540 | struct input_dev *input; | |
17c452f9 | 1541 | int keycode = 0; |
1da177e4 | 1542 | |
1da177e4 | 1543 | if (!video_device) |
d550d98d | 1544 | return; |
1da177e4 | 1545 | |
e6afa0de | 1546 | device = video_device->dev; |
e9dab196 LY |
1547 | bus = video_device->video; |
1548 | input = bus->input; | |
1da177e4 LT |
1549 | |
1550 | switch (event) { | |
4be44fcd | 1551 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1552 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1553 | keycode = KEY_BRIGHTNESS_CYCLE; |
1554 | break; | |
4be44fcd | 1555 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1556 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1557 | keycode = KEY_BRIGHTNESSUP; |
1558 | break; | |
4be44fcd | 1559 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1560 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1561 | keycode = KEY_BRIGHTNESSDOWN; |
1562 | break; | |
70f23fd6 | 1563 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1564 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1565 | keycode = KEY_BRIGHTNESS_ZERO; |
1566 | break; | |
4be44fcd | 1567 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1568 | brightness_switch_event(video_device, event); |
e9dab196 | 1569 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1570 | break; |
1571 | default: | |
1572 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1573 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1574 | break; |
1575 | } | |
e9dab196 | 1576 | |
7761f638 | 1577 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1578 | |
1579 | if (keycode) { | |
1580 | input_report_key(input, keycode, 1); | |
1581 | input_sync(input); | |
1582 | input_report_key(input, keycode, 0); | |
1583 | input_sync(input); | |
1584 | } | |
e9dab196 | 1585 | |
d550d98d | 1586 | return; |
1da177e4 LT |
1587 | } |
1588 | ||
ac7729da RW |
1589 | static int acpi_video_resume(struct notifier_block *nb, |
1590 | unsigned long val, void *ign) | |
863c1490 MG |
1591 | { |
1592 | struct acpi_video_bus *video; | |
1593 | struct acpi_video_device *video_device; | |
1594 | int i; | |
1595 | ||
ac7729da RW |
1596 | switch (val) { |
1597 | case PM_HIBERNATION_PREPARE: | |
1598 | case PM_SUSPEND_PREPARE: | |
1599 | case PM_RESTORE_PREPARE: | |
1600 | return NOTIFY_DONE; | |
1601 | } | |
863c1490 | 1602 | |
ac7729da RW |
1603 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1604 | ||
1605 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1606 | |
1607 | for (i = 0; i < video->attached_count; i++) { | |
1608 | video_device = video->attached_array[i].bind_info; | |
1609 | if (video_device && video_device->backlight) | |
1610 | acpi_video_set_brightness(video_device->backlight); | |
1611 | } | |
ac7729da RW |
1612 | |
1613 | return NOTIFY_OK; | |
863c1490 MG |
1614 | } |
1615 | ||
c504f8cb ZR |
1616 | static acpi_status |
1617 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1618 | void **return_value) | |
1619 | { | |
1620 | struct acpi_device *device = context; | |
1621 | struct acpi_device *sibling; | |
1622 | int result; | |
1623 | ||
1624 | if (handle == device->handle) | |
1625 | return AE_CTRL_TERMINATE; | |
1626 | ||
1627 | result = acpi_bus_get_device(handle, &sibling); | |
1628 | if (result) | |
1629 | return AE_OK; | |
1630 | ||
1631 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1632 | return AE_ALREADY_EXISTS; | |
1633 | ||
1634 | return AE_OK; | |
1635 | } | |
1636 | ||
67b662e1 AL |
1637 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1638 | { | |
99678ed7 HG |
1639 | struct backlight_properties props; |
1640 | struct pci_dev *pdev; | |
1641 | acpi_handle acpi_parent; | |
1642 | struct device *parent = NULL; | |
1643 | int result; | |
1644 | static int count; | |
1645 | char *name; | |
67b662e1 | 1646 | |
0b8db271 AL |
1647 | /* |
1648 | * Do not create backlight device for video output | |
1649 | * device that is not in the enumerated list. | |
1650 | */ | |
1651 | if (!acpi_video_device_in_dod(device)) { | |
1652 | dev_dbg(&device->dev->dev, "not in _DOD list, ignore\n"); | |
1653 | return; | |
1654 | } | |
1655 | ||
99678ed7 HG |
1656 | result = acpi_video_init_brightness(device); |
1657 | if (result) | |
1658 | return; | |
1659 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1660 | if (!name) | |
1661 | return; | |
1662 | count++; | |
67b662e1 | 1663 | |
99678ed7 | 1664 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1665 | |
99678ed7 HG |
1666 | pdev = acpi_get_pci_dev(acpi_parent); |
1667 | if (pdev) { | |
1668 | parent = &pdev->dev; | |
1669 | pci_dev_put(pdev); | |
1670 | } | |
67b662e1 | 1671 | |
99678ed7 HG |
1672 | memset(&props, 0, sizeof(struct backlight_properties)); |
1673 | props.type = BACKLIGHT_FIRMWARE; | |
1674 | props.max_brightness = device->brightness->count - 3; | |
1675 | device->backlight = backlight_device_register(name, | |
1676 | parent, | |
1677 | device, | |
1678 | &acpi_backlight_ops, | |
1679 | &props); | |
1680 | kfree(name); | |
1681 | if (IS_ERR(device->backlight)) | |
1682 | return; | |
67b662e1 | 1683 | |
99678ed7 HG |
1684 | /* |
1685 | * Save current brightness level in case we have to restore it | |
1686 | * before acpi_video_device_lcd_set_level() is called next time. | |
1687 | */ | |
1688 | device->backlight->props.brightness = | |
1689 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1690 | |
99678ed7 HG |
1691 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1692 | device->dev, &video_cooling_ops); | |
1693 | if (IS_ERR(device->cooling_dev)) { | |
1694 | /* | |
1695 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1696 | * Also, why the hell we are returning early and not attempt to | |
1697 | * register video output if cooling device registration failed? | |
1698 | * -- dtor | |
1699 | */ | |
1700 | device->cooling_dev = NULL; | |
1701 | return; | |
67b662e1 | 1702 | } |
99678ed7 HG |
1703 | |
1704 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1705 | device->cooling_dev->id); | |
1706 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1707 | &device->cooling_dev->device.kobj, | |
1708 | "thermal_cooling"); | |
1709 | if (result) | |
1710 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1711 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1712 | &device->dev->dev.kobj, "device"); | |
1713 | if (result) | |
1714 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1715 | } |
1716 | ||
dce4ec2e AL |
1717 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1718 | { | |
1719 | struct acpi_video_device *dev; | |
1720 | union acpi_object *levels; | |
1721 | ||
1722 | mutex_lock(&video->device_list_lock); | |
1723 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
1724 | if (!acpi_video_device_lcd_query_levels(dev, &levels)) | |
1725 | kfree(levels); | |
1726 | } | |
1727 | mutex_unlock(&video->device_list_lock); | |
1728 | } | |
1729 | ||
67b662e1 AL |
1730 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1731 | { | |
1732 | struct acpi_video_device *dev; | |
1733 | ||
53a92ba7 HG |
1734 | if (video->backlight_registered) |
1735 | return 0; | |
1736 | ||
dce4ec2e AL |
1737 | acpi_video_run_bcl_for_osi(video); |
1738 | ||
99678ed7 HG |
1739 | if (!acpi_video_verify_backlight_support()) |
1740 | return 0; | |
1741 | ||
67b662e1 AL |
1742 | mutex_lock(&video->device_list_lock); |
1743 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1744 | acpi_video_dev_register_backlight(dev); | |
1745 | mutex_unlock(&video->device_list_lock); | |
1746 | ||
99678ed7 HG |
1747 | video->backlight_registered = true; |
1748 | ||
67b662e1 AL |
1749 | video->pm_nb.notifier_call = acpi_video_resume; |
1750 | video->pm_nb.priority = 0; | |
1751 | return register_pm_notifier(&video->pm_nb); | |
1752 | } | |
1753 | ||
1754 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1755 | { | |
1756 | if (device->backlight) { | |
1757 | backlight_device_unregister(device->backlight); | |
1758 | device->backlight = NULL; | |
1759 | } | |
1760 | if (device->brightness) { | |
1761 | kfree(device->brightness->levels); | |
1762 | kfree(device->brightness); | |
1763 | device->brightness = NULL; | |
1764 | } | |
1765 | if (device->cooling_dev) { | |
1766 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1767 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1768 | thermal_cooling_device_unregister(device->cooling_dev); | |
1769 | device->cooling_dev = NULL; | |
1770 | } | |
1771 | } | |
1772 | ||
1773 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1774 | { | |
1775 | struct acpi_video_device *dev; | |
99678ed7 HG |
1776 | int error; |
1777 | ||
1778 | if (!video->backlight_registered) | |
1779 | return 0; | |
1780 | ||
1781 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1782 | |
1783 | mutex_lock(&video->device_list_lock); | |
1784 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1785 | acpi_video_dev_unregister_backlight(dev); | |
1786 | mutex_unlock(&video->device_list_lock); | |
1787 | ||
99678ed7 HG |
1788 | video->backlight_registered = false; |
1789 | ||
67b662e1 AL |
1790 | return error; |
1791 | } | |
1792 | ||
1793 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1794 | { | |
1795 | acpi_status status; | |
1796 | struct acpi_device *adev = device->dev; | |
1797 | ||
1798 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1799 | acpi_video_device_notify, device); | |
1800 | if (ACPI_FAILURE(status)) | |
1801 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1802 | else | |
1803 | device->flags.notify = 1; | |
1804 | } | |
1805 | ||
1806 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1807 | { | |
1808 | struct input_dev *input; | |
1809 | struct acpi_video_device *dev; | |
1810 | int error; | |
1811 | ||
1812 | video->input = input = input_allocate_device(); | |
1813 | if (!input) { | |
1814 | error = -ENOMEM; | |
1815 | goto out; | |
1816 | } | |
1817 | ||
1818 | error = acpi_video_bus_start_devices(video); | |
1819 | if (error) | |
1820 | goto err_free_input; | |
1821 | ||
1822 | snprintf(video->phys, sizeof(video->phys), | |
1823 | "%s/video/input0", acpi_device_hid(video->device)); | |
1824 | ||
1825 | input->name = acpi_device_name(video->device); | |
1826 | input->phys = video->phys; | |
1827 | input->id.bustype = BUS_HOST; | |
1828 | input->id.product = 0x06; | |
1829 | input->dev.parent = &video->device->dev; | |
1830 | input->evbit[0] = BIT(EV_KEY); | |
1831 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1832 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1833 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1834 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1835 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1836 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1837 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1838 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1839 | ||
1840 | error = input_register_device(input); | |
1841 | if (error) | |
1842 | goto err_stop_dev; | |
1843 | ||
1844 | mutex_lock(&video->device_list_lock); | |
1845 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1846 | acpi_video_dev_add_notify_handler(dev); | |
1847 | mutex_unlock(&video->device_list_lock); | |
1848 | ||
1849 | return 0; | |
1850 | ||
1851 | err_stop_dev: | |
1852 | acpi_video_bus_stop_devices(video); | |
1853 | err_free_input: | |
1854 | input_free_device(input); | |
1855 | video->input = NULL; | |
1856 | out: | |
1857 | return error; | |
1858 | } | |
1859 | ||
1860 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1861 | { | |
1862 | if (dev->flags.notify) { | |
1863 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1864 | acpi_video_device_notify); | |
1865 | dev->flags.notify = 0; | |
1866 | } | |
1867 | } | |
1868 | ||
1869 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1870 | { | |
1871 | struct acpi_video_device *dev; | |
1872 | ||
1873 | mutex_lock(&video->device_list_lock); | |
1874 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1875 | acpi_video_dev_remove_notify_handler(dev); | |
1876 | mutex_unlock(&video->device_list_lock); | |
1877 | ||
1878 | acpi_video_bus_stop_devices(video); | |
1879 | input_unregister_device(video->input); | |
1880 | video->input = NULL; | |
1881 | } | |
1882 | ||
53a92ba7 HG |
1883 | static int acpi_video_backlight_notify(struct notifier_block *nb, |
1884 | unsigned long val, void *bd) | |
1885 | { | |
1886 | struct backlight_device *backlight = bd; | |
1887 | struct acpi_video_bus *video; | |
1888 | ||
1889 | /* acpi_video_verify_backlight_support only cares about raw devices */ | |
1890 | if (backlight->props.type != BACKLIGHT_RAW) | |
1891 | return NOTIFY_DONE; | |
1892 | ||
1893 | video = container_of(nb, struct acpi_video_bus, backlight_nb); | |
1894 | ||
1895 | switch (val) { | |
1896 | case BACKLIGHT_REGISTERED: | |
1897 | if (!acpi_video_verify_backlight_support()) | |
1898 | acpi_video_bus_unregister_backlight(video); | |
1899 | break; | |
1900 | case BACKLIGHT_UNREGISTERED: | |
1901 | acpi_video_bus_register_backlight(video); | |
1902 | break; | |
1903 | } | |
1904 | ||
1905 | return NOTIFY_OK; | |
1906 | } | |
1907 | ||
1908 | static int acpi_video_bus_add_backlight_notify_handler( | |
1909 | struct acpi_video_bus *video) | |
1910 | { | |
1911 | int error; | |
1912 | ||
1913 | video->backlight_nb.notifier_call = acpi_video_backlight_notify; | |
1914 | video->backlight_nb.priority = 0; | |
1915 | error = backlight_register_notifier(&video->backlight_nb); | |
1916 | if (error == 0) | |
1917 | video->backlight_notifier_registered = true; | |
1918 | ||
1919 | return error; | |
1920 | } | |
1921 | ||
1922 | static int acpi_video_bus_remove_backlight_notify_handler( | |
1923 | struct acpi_video_bus *video) | |
1924 | { | |
1925 | if (!video->backlight_notifier_registered) | |
1926 | return 0; | |
1927 | ||
1928 | video->backlight_notifier_registered = false; | |
1929 | ||
1930 | return backlight_unregister_notifier(&video->backlight_nb); | |
1931 | } | |
1932 | ||
67b662e1 AL |
1933 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1934 | { | |
1935 | struct acpi_video_device *dev, *next; | |
1936 | ||
1937 | mutex_lock(&video->device_list_lock); | |
1938 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1939 | list_del(&dev->entry); | |
1940 | kfree(dev); | |
1941 | } | |
1942 | mutex_unlock(&video->device_list_lock); | |
1943 | ||
1944 | return 0; | |
1945 | } | |
1946 | ||
ac7729da RW |
1947 | static int instance; |
1948 | ||
4be44fcd | 1949 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1950 | { |
f51e8391 | 1951 | struct acpi_video_bus *video; |
f51e8391 | 1952 | int error; |
c504f8cb ZR |
1953 | acpi_status status; |
1954 | ||
1955 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1956 | device->parent->handle, 1, | |
1957 | acpi_video_bus_match, NULL, | |
1958 | device, NULL); | |
1959 | if (status == AE_ALREADY_EXISTS) { | |
1960 | printk(KERN_WARNING FW_BUG | |
1961 | "Duplicate ACPI video bus devices for the" | |
1962 | " same VGA controller, please try module " | |
1963 | "parameter \"video.allow_duplicates=1\"" | |
1964 | "if the current driver doesn't work.\n"); | |
1965 | if (!allow_duplicates) | |
1966 | return -ENODEV; | |
1967 | } | |
1da177e4 | 1968 | |
36bcbec7 | 1969 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1970 | if (!video) |
d550d98d | 1971 | return -ENOMEM; |
1da177e4 | 1972 | |
e6d9da1d ZR |
1973 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1974 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1975 | if (instance) | |
1976 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1977 | instance++; |
e6d9da1d | 1978 | } |
f3b39f13 ZY |
1979 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1980 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1981 | if (instance) | |
1982 | device->pnp.bus_id[3] = '0' + instance; | |
1983 | instance++; | |
1984 | } | |
e6d9da1d | 1985 | |
e6afa0de | 1986 | video->device = device; |
1da177e4 LT |
1987 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1988 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1989 | device->driver_data = video; |
1da177e4 LT |
1990 | |
1991 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1992 | error = acpi_video_bus_check(video); |
1993 | if (error) | |
1994 | goto err_free_video; | |
1da177e4 | 1995 | |
bbac81f5 | 1996 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1997 | INIT_LIST_HEAD(&video->video_device_list); |
1998 | ||
ea9f8856 IM |
1999 | error = acpi_video_bus_get_devices(video, device); |
2000 | if (error) | |
91e13aa3 | 2001 | goto err_put_video; |
1da177e4 | 2002 | |
1da177e4 | 2003 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
2004 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
2005 | video->flags.multihead ? "yes" : "no", | |
2006 | video->flags.rom ? "yes" : "no", | |
2007 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
2008 | mutex_lock(&video_list_lock); |
2009 | list_add_tail(&video->entry, &video_bus_head); | |
2010 | mutex_unlock(&video_list_lock); | |
1da177e4 | 2011 | |
67b662e1 AL |
2012 | acpi_video_bus_register_backlight(video); |
2013 | acpi_video_bus_add_notify_handler(video); | |
53a92ba7 | 2014 | acpi_video_bus_add_backlight_notify_handler(video); |
ac7729da | 2015 | |
f51e8391 DT |
2016 | return 0; |
2017 | ||
67b662e1 | 2018 | err_put_video: |
f51e8391 DT |
2019 | acpi_video_bus_put_devices(video); |
2020 | kfree(video->attached_array); | |
67b662e1 | 2021 | err_free_video: |
f51e8391 | 2022 | kfree(video); |
db89b4f0 | 2023 | device->driver_data = NULL; |
1da177e4 | 2024 | |
f51e8391 | 2025 | return error; |
1da177e4 LT |
2026 | } |
2027 | ||
51fac838 | 2028 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 2029 | { |
4be44fcd | 2030 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2031 | |
1da177e4 LT |
2032 | |
2033 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2034 | return -EINVAL; |
1da177e4 | 2035 | |
50dd0969 | 2036 | video = acpi_driver_data(device); |
1da177e4 | 2037 | |
53a92ba7 | 2038 | acpi_video_bus_remove_backlight_notify_handler(video); |
67b662e1 AL |
2039 | acpi_video_bus_remove_notify_handler(video); |
2040 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 2041 | acpi_video_bus_put_devices(video); |
1da177e4 | 2042 | |
67b662e1 AL |
2043 | mutex_lock(&video_list_lock); |
2044 | list_del(&video->entry); | |
2045 | mutex_unlock(&video_list_lock); | |
2046 | ||
6044ec88 | 2047 | kfree(video->attached_array); |
1da177e4 LT |
2048 | kfree(video); |
2049 | ||
d550d98d | 2050 | return 0; |
1da177e4 LT |
2051 | } |
2052 | ||
c6996bdd AC |
2053 | static int __init is_i740(struct pci_dev *dev) |
2054 | { | |
2055 | if (dev->device == 0x00D1) | |
2056 | return 1; | |
2057 | if (dev->device == 0x7000) | |
2058 | return 1; | |
2059 | return 0; | |
2060 | } | |
2061 | ||
74a365b3 MG |
2062 | static int __init intel_opregion_present(void) |
2063 | { | |
c6996bdd | 2064 | int opregion = 0; |
74a365b3 MG |
2065 | struct pci_dev *dev = NULL; |
2066 | u32 address; | |
2067 | ||
2068 | for_each_pci_dev(dev) { | |
2069 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2070 | continue; | |
2071 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2072 | continue; | |
c6996bdd AC |
2073 | /* We don't want to poke around undefined i740 registers */ |
2074 | if (is_i740(dev)) | |
2075 | continue; | |
74a365b3 MG |
2076 | pci_read_config_dword(dev, 0xfc, &address); |
2077 | if (!address) | |
2078 | continue; | |
c6996bdd | 2079 | opregion = 1; |
74a365b3 | 2080 | } |
c6996bdd | 2081 | return opregion; |
74a365b3 MG |
2082 | } |
2083 | ||
8e5c2b77 | 2084 | int acpi_video_register(void) |
1da177e4 | 2085 | { |
8e5c2b77 | 2086 | int result = 0; |
86e437f0 ZY |
2087 | if (register_count) { |
2088 | /* | |
8e5c2b77 RW |
2089 | * if the function of acpi_video_register is already called, |
2090 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
2091 | */ |
2092 | return 0; | |
2093 | } | |
1da177e4 | 2094 | |
67b662e1 AL |
2095 | mutex_init(&video_list_lock); |
2096 | INIT_LIST_HEAD(&video_bus_head); | |
2097 | ||
1da177e4 | 2098 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 2099 | if (result < 0) |
d550d98d | 2100 | return -ENODEV; |
1da177e4 | 2101 | |
86e437f0 ZY |
2102 | /* |
2103 | * When the acpi_video_bus is loaded successfully, increase | |
2104 | * the counter reference. | |
2105 | */ | |
2106 | register_count = 1; | |
2107 | ||
d550d98d | 2108 | return 0; |
1da177e4 | 2109 | } |
8e5c2b77 | 2110 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2111 | |
86e437f0 ZY |
2112 | void acpi_video_unregister(void) |
2113 | { | |
2114 | if (!register_count) { | |
2115 | /* | |
2116 | * If the acpi video bus is already unloaded, don't | |
2117 | * unload it again and return directly. | |
2118 | */ | |
2119 | return; | |
2120 | } | |
2121 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2122 | ||
86e437f0 ZY |
2123 | register_count = 0; |
2124 | ||
2125 | return; | |
2126 | } | |
2127 | EXPORT_SYMBOL(acpi_video_unregister); | |
2128 | ||
1b7f37e1 HG |
2129 | void acpi_video_unregister_backlight(void) |
2130 | { | |
2131 | struct acpi_video_bus *video; | |
2132 | ||
2133 | if (!register_count) | |
2134 | return; | |
2135 | ||
2136 | mutex_lock(&video_list_lock); | |
2137 | list_for_each_entry(video, &video_bus_head, entry) | |
2138 | acpi_video_bus_unregister_backlight(video); | |
2139 | mutex_unlock(&video_list_lock); | |
2140 | } | |
2141 | EXPORT_SYMBOL(acpi_video_unregister_backlight); | |
2142 | ||
74a365b3 MG |
2143 | /* |
2144 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2145 | * the video opregion code to be run first in order to initialise | |
2146 | * state before any ACPI video calls are made. To handle this we defer | |
2147 | * registration of the video class until the opregion code has run. | |
2148 | */ | |
2149 | ||
2150 | static int __init acpi_video_init(void) | |
2151 | { | |
45cb50e6 ZR |
2152 | dmi_check_system(video_dmi_table); |
2153 | ||
74a365b3 MG |
2154 | if (intel_opregion_present()) |
2155 | return 0; | |
2156 | ||
2157 | return acpi_video_register(); | |
2158 | } | |
1da177e4 | 2159 | |
86e437f0 | 2160 | static void __exit acpi_video_exit(void) |
1da177e4 | 2161 | { |
86e437f0 | 2162 | acpi_video_unregister(); |
1da177e4 | 2163 | |
d550d98d | 2164 | return; |
1da177e4 LT |
2165 | } |
2166 | ||
2167 | module_init(acpi_video_init); | |
2168 | module_exit(acpi_video_exit); |