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 | }, | |
45cb50e6 ZR |
525 | {} |
526 | }; | |
527 | ||
994fa63c DB |
528 | static unsigned long long |
529 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
530 | unsigned long long bqc_value) | |
531 | { | |
532 | unsigned long long level; | |
533 | ||
534 | if (device->brightness->flags._BQC_use_index) { | |
535 | /* | |
536 | * _BQC returns an index that doesn't account for | |
537 | * the first 2 items with special meaning, so we need | |
538 | * to compensate for that by offsetting ourselves | |
539 | */ | |
540 | if (device->brightness->flags._BCL_reversed) | |
541 | bqc_value = device->brightness->count - 3 - bqc_value; | |
542 | ||
543 | level = device->brightness->levels[bqc_value + 2]; | |
544 | } else { | |
545 | level = bqc_value; | |
546 | } | |
547 | ||
548 | level += bqc_offset_aml_bug_workaround; | |
549 | ||
550 | return level; | |
551 | } | |
552 | ||
1da177e4 | 553 | static int |
4be44fcd | 554 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 555 | unsigned long long *level, bool raw) |
1da177e4 | 556 | { |
c8890f90 | 557 | acpi_status status = AE_OK; |
4e231fa4 | 558 | int i; |
c8890f90 | 559 | |
c60d638e ZR |
560 | if (device->cap._BQC || device->cap._BCQ) { |
561 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
562 | ||
563 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
564 | NULL, level); |
565 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
566 | if (raw) { |
567 | /* | |
568 | * Caller has indicated he wants the raw | |
569 | * value returned by _BQC, so don't furtherly | |
570 | * mess with the value. | |
571 | */ | |
572 | return 0; | |
573 | } | |
574 | ||
994fa63c | 575 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 576 | |
4e231fa4 VS |
577 | for (i = 2; i < device->brightness->count; i++) |
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 | */ | |
586 | ACPI_WARNING((AE_INFO, | |
587 | "%s returned an invalid level", | |
588 | buf)); | |
589 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 590 | } else { |
21fcb34e FC |
591 | /* |
592 | * Fixme: | |
c8890f90 ZR |
593 | * should we return an error or ignore this failure? |
594 | * dev->brightness->curr is a cached value which stores | |
595 | * the correct current backlight level in most cases. | |
596 | * ACPI video backlight still works w/ buggy _BQC. | |
597 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
598 | */ | |
c60d638e ZR |
599 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
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 { | |
6468463a | 639 | printk(KERN_ERR PREFIX "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 | |
98fb8fe1 | 663 | * of the LCD when the power changes from AC to DC |
21fcb34e | 664 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 665 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 666 | * Return Value: |
ea9f8856 | 667 | * -EINVAL wrong arg. |
1da177e4 LT |
668 | */ |
669 | ||
670 | static int | |
4be44fcd | 671 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 672 | { |
ea9f8856 | 673 | acpi_status status; |
1da177e4 | 674 | |
b0373843 ZR |
675 | if (!video->cap._DOS) |
676 | return 0; | |
1da177e4 | 677 | |
ea9f8856 IM |
678 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
679 | return -EINVAL; | |
0db98202 JL |
680 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
681 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
682 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
683 | if (ACPI_FAILURE(status)) |
684 | return -EIO; | |
1da177e4 | 685 | |
ea9f8856 | 686 | return 0; |
1da177e4 LT |
687 | } |
688 | ||
935e5f29 ZR |
689 | /* |
690 | * Simple comparison function used to sort backlight levels. | |
691 | */ | |
692 | ||
693 | static int | |
694 | acpi_video_cmp_level(const void *a, const void *b) | |
695 | { | |
696 | return *(int *)a - *(int *)b; | |
697 | } | |
698 | ||
a50188da AL |
699 | /* |
700 | * Decides if _BQC/_BCQ for this system is usable | |
701 | * | |
702 | * We do this by changing the level first and then read out the current | |
703 | * brightness level, if the value does not match, find out if it is using | |
704 | * index. If not, clear the _BQC/_BCQ capability. | |
705 | */ | |
706 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
707 | int max_level, int current_level) | |
708 | { | |
709 | struct acpi_video_device_brightness *br = device->brightness; | |
710 | int result; | |
711 | unsigned long long level; | |
712 | int test_level; | |
713 | ||
714 | /* don't mess with existing known broken systems */ | |
715 | if (bqc_offset_aml_bug_workaround) | |
716 | return 0; | |
717 | ||
718 | /* | |
719 | * Some systems always report current brightness level as maximum | |
720 | * through _BQC, we need to test another value for them. | |
721 | */ | |
b3b301c5 | 722 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
723 | |
724 | result = acpi_video_device_lcd_set_level(device, test_level); | |
725 | if (result) | |
726 | return result; | |
727 | ||
728 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
729 | if (result) | |
730 | return result; | |
731 | ||
732 | if (level != test_level) { | |
733 | /* buggy _BQC found, need to find out if it uses index */ | |
734 | if (level < br->count) { | |
735 | if (br->flags._BCL_reversed) | |
736 | level = br->count - 3 - level; | |
737 | if (br->levels[level + 2] == test_level) | |
738 | br->flags._BQC_use_index = 1; | |
739 | } | |
740 | ||
741 | if (!br->flags._BQC_use_index) | |
742 | device->cap._BQC = device->cap._BCQ = 0; | |
743 | } | |
744 | ||
745 | return 0; | |
746 | } | |
747 | ||
748 | ||
1da177e4 | 749 | /* |
21fcb34e FC |
750 | * Arg: |
751 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
752 | * |
753 | * Return Value: | |
469778c1 JJ |
754 | * Maximum brightness level |
755 | * | |
756 | * Allocate and initialize device->brightness. | |
757 | */ | |
758 | ||
759 | static int | |
760 | acpi_video_init_brightness(struct acpi_video_device *device) | |
761 | { | |
762 | union acpi_object *obj = NULL; | |
d32f6947 | 763 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 764 | unsigned long long level, level_old; |
469778c1 JJ |
765 | union acpi_object *o; |
766 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 767 | int result = -EINVAL; |
bd8ba205 | 768 | u32 value; |
469778c1 JJ |
769 | |
770 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
771 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
772 | "LCD brightness level\n")); | |
773 | goto out; | |
774 | } | |
775 | ||
776 | if (obj->package.count < 2) | |
777 | goto out; | |
778 | ||
779 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
780 | if (!br) { | |
781 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 782 | result = -ENOMEM; |
469778c1 JJ |
783 | goto out; |
784 | } | |
785 | ||
d32f6947 | 786 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 787 | GFP_KERNEL); |
1a7c618a ZR |
788 | if (!br->levels) { |
789 | result = -ENOMEM; | |
469778c1 | 790 | goto out_free; |
1a7c618a | 791 | } |
469778c1 JJ |
792 | |
793 | for (i = 0; i < obj->package.count; i++) { | |
794 | o = (union acpi_object *)&obj->package.elements[i]; | |
795 | if (o->type != ACPI_TYPE_INTEGER) { | |
796 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
797 | continue; | |
798 | } | |
bd8ba205 HG |
799 | value = (u32) o->integer.value; |
800 | /* Skip duplicate entries */ | |
801 | if (count > 2 && br->levels[count - 1] == value) | |
802 | continue; | |
803 | ||
804 | br->levels[count] = value; | |
469778c1 JJ |
805 | |
806 | if (br->levels[count] > max_level) | |
807 | max_level = br->levels[count]; | |
808 | count++; | |
809 | } | |
810 | ||
d32f6947 ZR |
811 | /* |
812 | * some buggy BIOS don't export the levels | |
813 | * when machine is on AC/Battery in _BCL package. | |
814 | * In this case, the first two elements in _BCL packages | |
815 | * are also supported brightness levels that OS should take care of. | |
816 | */ | |
90af2cf6 ZR |
817 | for (i = 2; i < count; i++) { |
818 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 819 | level_ac_battery++; |
90af2cf6 ZR |
820 | if (br->levels[i] == br->levels[1]) |
821 | level_ac_battery++; | |
822 | } | |
d32f6947 ZR |
823 | |
824 | if (level_ac_battery < 2) { | |
825 | level_ac_battery = 2 - level_ac_battery; | |
826 | br->flags._BCL_no_ac_battery_levels = 1; | |
827 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
828 | br->levels[i] = br->levels[i - level_ac_battery]; | |
829 | count += level_ac_battery; | |
830 | } else if (level_ac_battery > 2) | |
bf6787eb | 831 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 832 | |
d80fb99f ZR |
833 | /* Check if the _BCL package is in a reversed order */ |
834 | if (max_level == br->levels[2]) { | |
835 | br->flags._BCL_reversed = 1; | |
836 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
837 | acpi_video_cmp_level, NULL); | |
838 | } else if (max_level != br->levels[count - 1]) | |
839 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 840 | "Found unordered _BCL package")); |
469778c1 JJ |
841 | |
842 | br->count = count; | |
843 | device->brightness = br; | |
1a7c618a | 844 | |
1a7c618a | 845 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 846 | br->curr = level = max_level; |
e047cca6 ZR |
847 | |
848 | if (!device->cap._BQC) | |
849 | goto set_level; | |
850 | ||
a89803df DB |
851 | result = acpi_video_device_lcd_get_level_current(device, |
852 | &level_old, true); | |
1a7c618a ZR |
853 | if (result) |
854 | goto out_free_levels; | |
855 | ||
a50188da | 856 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
857 | if (result) |
858 | goto out_free_levels; | |
a50188da AL |
859 | /* |
860 | * cap._BQC may get cleared due to _BQC is found to be broken | |
861 | * in acpi_video_bqc_quirk, so check again here. | |
862 | */ | |
863 | if (!device->cap._BQC) | |
864 | goto set_level; | |
e047cca6 | 865 | |
545ef368 AL |
866 | level = acpi_video_bqc_value_to_level(device, level_old); |
867 | /* | |
868 | * On some buggy laptops, _BQC returns an uninitialized | |
869 | * value when invoked for the first time, i.e. | |
870 | * level_old is invalid (no matter whether it's a level | |
871 | * or an index). Set the backlight to max_level in this case. | |
872 | */ | |
873 | for (i = 2; i < br->count; i++) | |
874 | if (level == br->levels[i]) | |
875 | break; | |
876 | if (i == br->count || !level) | |
877 | level = max_level; | |
e047cca6 | 878 | |
e047cca6 | 879 | set_level: |
90c53ca4 | 880 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
881 | if (result) |
882 | goto out_free_levels; | |
1a7c618a | 883 | |
d32f6947 ZR |
884 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
885 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 886 | kfree(obj); |
1a7c618a | 887 | return result; |
469778c1 JJ |
888 | |
889 | out_free_levels: | |
890 | kfree(br->levels); | |
891 | out_free: | |
892 | kfree(br); | |
893 | out: | |
894 | device->brightness = NULL; | |
895 | kfree(obj); | |
1a7c618a | 896 | return result; |
469778c1 JJ |
897 | } |
898 | ||
899 | /* | |
900 | * Arg: | |
901 | * device : video output device (LCD, CRT, ..) | |
902 | * | |
903 | * Return Value: | |
21fcb34e | 904 | * None |
1da177e4 | 905 | * |
98fb8fe1 | 906 | * Find out all required AML methods defined under the output |
1da177e4 LT |
907 | * device. |
908 | */ | |
909 | ||
4be44fcd | 910 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 911 | { |
952c63e9 | 912 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 913 | device->cap._ADR = 1; |
952c63e9 | 914 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 915 | device->cap._BCL = 1; |
952c63e9 | 916 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 917 | device->cap._BCM = 1; |
952c63e9 | 918 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 919 | device->cap._BQC = 1; |
952c63e9 | 920 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
921 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
922 | device->cap._BCQ = 1; | |
923 | } | |
924 | ||
952c63e9 | 925 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 926 | device->cap._DDC = 1; |
1da177e4 LT |
927 | } |
928 | ||
929 | /* | |
21fcb34e FC |
930 | * Arg: |
931 | * device : video output device (VGA) | |
1da177e4 LT |
932 | * |
933 | * Return Value: | |
21fcb34e | 934 | * None |
1da177e4 | 935 | * |
98fb8fe1 | 936 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
937 | */ |
938 | ||
4be44fcd | 939 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 940 | { |
952c63e9 | 941 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 942 | video->cap._DOS = 1; |
952c63e9 | 943 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 944 | video->cap._DOD = 1; |
952c63e9 | 945 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 946 | video->cap._ROM = 1; |
952c63e9 | 947 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 948 | video->cap._GPD = 1; |
952c63e9 | 949 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 950 | video->cap._SPD = 1; |
952c63e9 | 951 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 952 | video->cap._VPO = 1; |
1da177e4 LT |
953 | } |
954 | ||
955 | /* | |
956 | * Check whether the video bus device has required AML method to | |
957 | * support the desired features | |
958 | */ | |
959 | ||
4be44fcd | 960 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 961 | { |
4be44fcd | 962 | acpi_status status = -ENOENT; |
1e4cffe7 | 963 | struct pci_dev *dev; |
1da177e4 LT |
964 | |
965 | if (!video) | |
d550d98d | 966 | return -EINVAL; |
1da177e4 | 967 | |
1e4cffe7 | 968 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
969 | if (!dev) |
970 | return -ENODEV; | |
1e4cffe7 | 971 | pci_dev_put(dev); |
22c13f9d | 972 | |
21fcb34e FC |
973 | /* |
974 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
975 | * to check well known required nodes. |
976 | */ | |
977 | ||
98fb8fe1 | 978 | /* Does this device support video switching? */ |
3a1151e3 SB |
979 | if (video->cap._DOS || video->cap._DOD) { |
980 | if (!video->cap._DOS) { | |
981 | printk(KERN_WARNING FW_BUG | |
982 | "ACPI(%s) defines _DOD but not _DOS\n", | |
983 | acpi_device_bid(video->device)); | |
984 | } | |
1da177e4 LT |
985 | video->flags.multihead = 1; |
986 | status = 0; | |
987 | } | |
988 | ||
98fb8fe1 | 989 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 990 | if (video->cap._ROM) { |
1da177e4 LT |
991 | video->flags.rom = 1; |
992 | status = 0; | |
993 | } | |
994 | ||
98fb8fe1 | 995 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 996 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
997 | video->flags.post = 1; |
998 | status = 0; | |
999 | } | |
1000 | ||
d550d98d | 1001 | return status; |
1da177e4 LT |
1002 | } |
1003 | ||
21fcb34e FC |
1004 | /* |
1005 | * -------------------------------------------------------------------------- | |
1006 | * Driver Interface | |
1007 | * -------------------------------------------------------------------------- | |
1008 | */ | |
1da177e4 LT |
1009 | |
1010 | /* device interface */ | |
915ea7e4 | 1011 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1012 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1013 | { | |
78eed028 DT |
1014 | struct acpi_video_enumerated_device *ids; |
1015 | int i; | |
1016 | ||
1017 | for (i = 0; i < video->attached_count; i++) { | |
1018 | ids = &video->attached_array[i]; | |
1019 | if ((ids->value.int_val & 0xffff) == device_id) | |
1020 | return &ids->value.attrib; | |
1021 | } | |
82cae999 | 1022 | |
82cae999 RZ |
1023 | return NULL; |
1024 | } | |
1da177e4 | 1025 | |
e92a7162 MG |
1026 | static int |
1027 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1028 | unsigned long device_id) | |
1029 | { | |
1030 | struct acpi_video_enumerated_device *ids; | |
1031 | int i; | |
1032 | ||
1033 | for (i = 0; i < video->attached_count; i++) { | |
1034 | ids = &video->attached_array[i]; | |
1035 | if ((ids->value.int_val & 0xffff) == device_id) | |
1036 | return ids->value.int_val; | |
1037 | } | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
1da177e4 | 1042 | static int |
4be44fcd LB |
1043 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1044 | struct acpi_video_bus *video) | |
1da177e4 | 1045 | { |
27663c58 | 1046 | unsigned long long device_id; |
e92a7162 | 1047 | int status, device_type; |
4be44fcd | 1048 | struct acpi_video_device *data; |
915ea7e4 | 1049 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1050 | |
4be44fcd LB |
1051 | status = |
1052 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1053 | /* Some device omits _ADR, we skip them instead of fail */ |
1054 | if (ACPI_FAILURE(status)) | |
1055 | return 0; | |
1da177e4 | 1056 | |
91e13aa3 AL |
1057 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1058 | if (!data) | |
1059 | return -ENOMEM; | |
82cae999 | 1060 | |
91e13aa3 AL |
1061 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1062 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1063 | device->driver_data = data; | |
1064 | ||
1065 | data->device_id = device_id; | |
1066 | data->video = video; | |
1067 | data->dev = device; | |
8ab58e8e LT |
1068 | INIT_DELAYED_WORK(&data->switch_brightness_work, |
1069 | acpi_video_switch_brightness); | |
91e13aa3 AL |
1070 | |
1071 | attribute = acpi_video_get_device_attr(video, device_id); | |
1072 | ||
915ea7e4 | 1073 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1074 | switch (attribute->display_type) { |
1075 | case ACPI_VIDEO_DISPLAY_CRT: | |
1076 | data->flags.crt = 1; | |
1077 | break; | |
1078 | case ACPI_VIDEO_DISPLAY_TV: | |
1079 | data->flags.tvout = 1; | |
1080 | break; | |
1081 | case ACPI_VIDEO_DISPLAY_DVI: | |
1082 | data->flags.dvi = 1; | |
1083 | break; | |
1084 | case ACPI_VIDEO_DISPLAY_LCD: | |
1085 | data->flags.lcd = 1; | |
1086 | break; | |
1087 | default: | |
1088 | data->flags.unknown = 1; | |
1089 | break; | |
1090 | } | |
915ea7e4 | 1091 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1092 | data->flags.bios = 1; |
1093 | } else { | |
1094 | /* Check for legacy IDs */ | |
1095 | device_type = acpi_video_get_device_type(video, device_id); | |
1096 | /* Ignore bits 16 and 18-20 */ | |
1097 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1098 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1099 | data->flags.crt = 1; | |
1100 | break; | |
1101 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1102 | data->flags.lcd = 1; | |
1103 | break; | |
1104 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1105 | data->flags.tvout = 1; | |
1106 | break; | |
1107 | default: | |
1108 | data->flags.unknown = 1; | |
e92a7162 | 1109 | } |
91e13aa3 | 1110 | } |
4be44fcd | 1111 | |
91e13aa3 AL |
1112 | acpi_video_device_bind(video, data); |
1113 | acpi_video_device_find_cap(data); | |
1da177e4 | 1114 | |
91e13aa3 AL |
1115 | mutex_lock(&video->device_list_lock); |
1116 | list_add_tail(&data->entry, &video->video_device_list); | |
1117 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1118 | |
91e13aa3 | 1119 | return status; |
1da177e4 LT |
1120 | } |
1121 | ||
1122 | /* | |
1123 | * Arg: | |
21fcb34e | 1124 | * video : video bus device |
1da177e4 LT |
1125 | * |
1126 | * Return: | |
21fcb34e FC |
1127 | * none |
1128 | * | |
1129 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1130 | * bind the ids with the corresponding video devices |
1131 | * under the video bus. | |
4be44fcd | 1132 | */ |
1da177e4 | 1133 | |
4be44fcd | 1134 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1135 | { |
ff102ea9 DT |
1136 | struct acpi_video_device *dev; |
1137 | ||
bbac81f5 | 1138 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1139 | |
1140 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1141 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1142 | |
bbac81f5 | 1143 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1144 | } |
1145 | ||
1146 | /* | |
1147 | * Arg: | |
21fcb34e FC |
1148 | * video : video bus device |
1149 | * device : video output device under the video | |
1150 | * bus | |
1da177e4 LT |
1151 | * |
1152 | * Return: | |
21fcb34e FC |
1153 | * none |
1154 | * | |
1da177e4 LT |
1155 | * Bind the ids with the corresponding video devices |
1156 | * under the video bus. | |
4be44fcd | 1157 | */ |
1da177e4 LT |
1158 | |
1159 | static void | |
4be44fcd LB |
1160 | acpi_video_device_bind(struct acpi_video_bus *video, |
1161 | struct acpi_video_device *device) | |
1da177e4 | 1162 | { |
78eed028 | 1163 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1164 | int i; |
1da177e4 | 1165 | |
78eed028 DT |
1166 | for (i = 0; i < video->attached_count; i++) { |
1167 | ids = &video->attached_array[i]; | |
1168 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1169 | ids->bind_info = device; | |
1da177e4 LT |
1170 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1171 | } | |
1172 | } | |
1da177e4 LT |
1173 | } |
1174 | ||
0b8db271 AL |
1175 | static bool acpi_video_device_in_dod(struct acpi_video_device *device) |
1176 | { | |
1177 | struct acpi_video_bus *video = device->video; | |
1178 | int i; | |
1179 | ||
b4df4636 AL |
1180 | /* |
1181 | * If we have a broken _DOD or we have more than 8 output devices | |
1182 | * under the graphics controller node that we can't proper deal with | |
1183 | * in the operation region code currently, no need to test. | |
1184 | */ | |
1185 | if (!video->attached_count || video->child_count > 8) | |
0b8db271 AL |
1186 | return true; |
1187 | ||
1188 | for (i = 0; i < video->attached_count; i++) { | |
35d0565b AL |
1189 | if ((video->attached_array[i].value.int_val & 0xfff) == |
1190 | (device->device_id & 0xfff)) | |
0b8db271 AL |
1191 | return true; |
1192 | } | |
1193 | ||
1194 | return false; | |
1195 | } | |
1196 | ||
1da177e4 LT |
1197 | /* |
1198 | * Arg: | |
21fcb34e | 1199 | * video : video bus device |
1da177e4 LT |
1200 | * |
1201 | * Return: | |
21fcb34e FC |
1202 | * < 0 : error |
1203 | * | |
1da177e4 LT |
1204 | * Call _DOD to enumerate all devices attached to display adapter |
1205 | * | |
4be44fcd | 1206 | */ |
1da177e4 LT |
1207 | |
1208 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1209 | { | |
4be44fcd LB |
1210 | int status; |
1211 | int count; | |
1212 | int i; | |
78eed028 | 1213 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1214 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1215 | union acpi_object *dod = NULL; | |
1216 | union acpi_object *obj; | |
1da177e4 | 1217 | |
90130268 | 1218 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1219 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1220 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1221 | return status; |
1da177e4 LT |
1222 | } |
1223 | ||
50dd0969 | 1224 | dod = buffer.pointer; |
1da177e4 | 1225 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1226 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1227 | status = -EFAULT; |
1228 | goto out; | |
1229 | } | |
1230 | ||
1231 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1232 | dod->package.count)); |
1da177e4 | 1233 | |
78eed028 DT |
1234 | active_list = kcalloc(1 + dod->package.count, |
1235 | sizeof(struct acpi_video_enumerated_device), | |
1236 | GFP_KERNEL); | |
1237 | if (!active_list) { | |
1da177e4 LT |
1238 | status = -ENOMEM; |
1239 | goto out; | |
1240 | } | |
1241 | ||
1242 | count = 0; | |
1243 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1244 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1245 | |
1246 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1247 | printk(KERN_ERR PREFIX |
1248 | "Invalid _DOD data in element %d\n", i); | |
1249 | continue; | |
1da177e4 | 1250 | } |
78eed028 DT |
1251 | |
1252 | active_list[count].value.int_val = obj->integer.value; | |
1253 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1254 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1255 | (int)obj->integer.value)); | |
1da177e4 LT |
1256 | count++; |
1257 | } | |
1da177e4 | 1258 | |
6044ec88 | 1259 | kfree(video->attached_array); |
4be44fcd | 1260 | |
78eed028 | 1261 | video->attached_array = active_list; |
1da177e4 | 1262 | video->attached_count = count; |
78eed028 | 1263 | |
915ea7e4 | 1264 | out: |
02438d87 | 1265 | kfree(buffer.pointer); |
d550d98d | 1266 | return status; |
1da177e4 LT |
1267 | } |
1268 | ||
4be44fcd LB |
1269 | static int |
1270 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1271 | u32 level_current, u32 event) | |
1da177e4 | 1272 | { |
63f0edfc | 1273 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1274 | max = max_below = 0; |
1275 | min = min_above = 255; | |
63f0edfc | 1276 | /* Find closest level to level_current */ |
0a3db1ce | 1277 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1278 | l = device->brightness->levels[i]; |
1279 | if (abs(l - level_current) < abs(delta)) { | |
1280 | delta = l - level_current; | |
1281 | if (!delta) | |
1282 | break; | |
1283 | } | |
1284 | } | |
1285 | /* Ajust level_current to closest available level */ | |
1286 | level_current += delta; | |
0a3db1ce | 1287 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1288 | l = device->brightness->levels[i]; |
1289 | if (l < min) | |
1290 | min = l; | |
1291 | if (l > max) | |
1292 | max = l; | |
1293 | if (l < min_above && l > level_current) | |
1294 | min_above = l; | |
1295 | if (l > max_below && l < level_current) | |
1296 | max_below = l; | |
1297 | } | |
1298 | ||
1299 | switch (event) { | |
1300 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1301 | return (level_current < max) ? min_above : min; | |
1302 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1303 | return (level_current < max) ? min_above : max; | |
1304 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1305 | return (level_current > min) ? max_below : min; | |
1306 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1307 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1308 | return 0; | |
1309 | default: | |
1310 | return level_current; | |
1311 | } | |
1da177e4 LT |
1312 | } |
1313 | ||
8ab58e8e LT |
1314 | static void |
1315 | acpi_video_switch_brightness(struct work_struct *work) | |
1da177e4 | 1316 | { |
8ab58e8e LT |
1317 | struct acpi_video_device *device = container_of(to_delayed_work(work), |
1318 | struct acpi_video_device, switch_brightness_work); | |
27663c58 | 1319 | unsigned long long level_current, level_next; |
8ab58e8e | 1320 | int event = device->switch_brightness_event; |
c8890f90 ZR |
1321 | int result = -EINVAL; |
1322 | ||
fbc9fe1b AL |
1323 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1324 | if (!acpi_video_verify_backlight_support()) | |
8ab58e8e | 1325 | return; |
28c32e99 | 1326 | |
469778c1 | 1327 | if (!device->brightness) |
c8890f90 ZR |
1328 | goto out; |
1329 | ||
1330 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1331 | &level_current, |
1332 | false); | |
c8890f90 ZR |
1333 | if (result) |
1334 | goto out; | |
1335 | ||
1da177e4 | 1336 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1337 | |
24450c7a | 1338 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1339 | |
36342742 MG |
1340 | if (!result) |
1341 | backlight_force_update(device->backlight, | |
1342 | BACKLIGHT_UPDATE_HOTKEY); | |
1343 | ||
c8890f90 ZR |
1344 | out: |
1345 | if (result) | |
1346 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1da177e4 LT |
1347 | } |
1348 | ||
e92a7162 MG |
1349 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1350 | void **edid) | |
1351 | { | |
1352 | struct acpi_video_bus *video; | |
1353 | struct acpi_video_device *video_device; | |
1354 | union acpi_object *buffer = NULL; | |
1355 | acpi_status status; | |
1356 | int i, length; | |
1357 | ||
1358 | if (!device || !acpi_driver_data(device)) | |
1359 | return -EINVAL; | |
1360 | ||
1361 | video = acpi_driver_data(device); | |
1362 | ||
1363 | for (i = 0; i < video->attached_count; i++) { | |
1364 | video_device = video->attached_array[i].bind_info; | |
1365 | length = 256; | |
1366 | ||
1367 | if (!video_device) | |
1368 | continue; | |
1369 | ||
82069552 ZR |
1370 | if (!video_device->cap._DDC) |
1371 | continue; | |
1372 | ||
e92a7162 MG |
1373 | if (type) { |
1374 | switch (type) { | |
1375 | case ACPI_VIDEO_DISPLAY_CRT: | |
1376 | if (!video_device->flags.crt) | |
1377 | continue; | |
1378 | break; | |
1379 | case ACPI_VIDEO_DISPLAY_TV: | |
1380 | if (!video_device->flags.tvout) | |
1381 | continue; | |
1382 | break; | |
1383 | case ACPI_VIDEO_DISPLAY_DVI: | |
1384 | if (!video_device->flags.dvi) | |
1385 | continue; | |
1386 | break; | |
1387 | case ACPI_VIDEO_DISPLAY_LCD: | |
1388 | if (!video_device->flags.lcd) | |
1389 | continue; | |
1390 | break; | |
1391 | } | |
1392 | } else if (video_device->device_id != device_id) { | |
1393 | continue; | |
1394 | } | |
1395 | ||
1396 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1397 | ||
1398 | if (ACPI_FAILURE(status) || !buffer || | |
1399 | buffer->type != ACPI_TYPE_BUFFER) { | |
1400 | length = 128; | |
1401 | status = acpi_video_device_EDID(video_device, &buffer, | |
1402 | length); | |
1403 | if (ACPI_FAILURE(status) || !buffer || | |
1404 | buffer->type != ACPI_TYPE_BUFFER) { | |
1405 | continue; | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | *edid = buffer->buffer.pointer; | |
1410 | return length; | |
1411 | } | |
1412 | ||
1413 | return -ENODEV; | |
1414 | } | |
1415 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1416 | ||
1da177e4 | 1417 | static int |
4be44fcd LB |
1418 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1419 | struct acpi_device *device) | |
1da177e4 | 1420 | { |
fba4e087 | 1421 | int status = 0; |
ff102ea9 | 1422 | struct acpi_device *dev; |
1da177e4 | 1423 | |
fba4e087 IM |
1424 | /* |
1425 | * There are systems where video module known to work fine regardless | |
1426 | * of broken _DOD and ignoring returned value here doesn't cause | |
1427 | * any issues later. | |
1428 | */ | |
1429 | acpi_video_device_enumerate(video); | |
1da177e4 | 1430 | |
ff102ea9 | 1431 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1432 | |
1433 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1434 | if (status) { |
91e13aa3 AL |
1435 | dev_err(&dev->dev, "Can't attach device\n"); |
1436 | break; | |
1da177e4 | 1437 | } |
b4df4636 | 1438 | video->child_count++; |
1da177e4 | 1439 | } |
d550d98d | 1440 | return status; |
1da177e4 LT |
1441 | } |
1442 | ||
1da177e4 LT |
1443 | /* acpi_video interface */ |
1444 | ||
efaa14c7 AL |
1445 | /* |
1446 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1447 | * preform any automatic brightness change on receiving a notification. | |
1448 | */ | |
4be44fcd | 1449 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1450 | { |
efaa14c7 | 1451 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1452 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1453 | } |
1454 | ||
4be44fcd | 1455 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1456 | { |
efaa14c7 | 1457 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1458 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1459 | } |
1460 | ||
7015558f | 1461 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1462 | { |
7015558f | 1463 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1464 | struct input_dev *input; |
17c452f9 | 1465 | int keycode = 0; |
e9dab196 | 1466 | |
67b662e1 | 1467 | if (!video || !video->input) |
d550d98d | 1468 | return; |
1da177e4 | 1469 | |
e9dab196 | 1470 | input = video->input; |
1da177e4 LT |
1471 | |
1472 | switch (event) { | |
98fb8fe1 | 1473 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1474 | * most likely via hotkey. */ |
8a37c65d | 1475 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1476 | break; |
1477 | ||
98fb8fe1 | 1478 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1479 | * connector. */ |
1480 | acpi_video_device_enumerate(video); | |
1481 | acpi_video_device_rebind(video); | |
e9dab196 | 1482 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1483 | break; |
1484 | ||
4be44fcd | 1485 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1486 | keycode = KEY_SWITCHVIDEOMODE; |
1487 | break; | |
4be44fcd | 1488 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1489 | keycode = KEY_VIDEO_NEXT; |
1490 | break; | |
4be44fcd | 1491 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1492 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1493 | break; |
1494 | ||
1495 | default: | |
1496 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1497 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1498 | break; |
1499 | } | |
1500 | ||
8a37c65d LT |
1501 | if (acpi_notifier_call_chain(device, event, 0)) |
1502 | /* Something vetoed the keypress. */ | |
1503 | keycode = 0; | |
17c452f9 MG |
1504 | |
1505 | if (keycode) { | |
1506 | input_report_key(input, keycode, 1); | |
1507 | input_sync(input); | |
1508 | input_report_key(input, keycode, 0); | |
1509 | input_sync(input); | |
1510 | } | |
e9dab196 | 1511 | |
d550d98d | 1512 | return; |
1da177e4 LT |
1513 | } |
1514 | ||
8ab58e8e LT |
1515 | static void brightness_switch_event(struct acpi_video_device *video_device, |
1516 | u32 event) | |
1517 | { | |
1518 | if (!brightness_switch_enabled) | |
1519 | return; | |
1520 | ||
1521 | video_device->switch_brightness_event = event; | |
1522 | schedule_delayed_work(&video_device->switch_brightness_work, HZ / 10); | |
1523 | } | |
1524 | ||
4be44fcd | 1525 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1526 | { |
50dd0969 | 1527 | struct acpi_video_device *video_device = data; |
4be44fcd | 1528 | struct acpi_device *device = NULL; |
e9dab196 LY |
1529 | struct acpi_video_bus *bus; |
1530 | struct input_dev *input; | |
17c452f9 | 1531 | int keycode = 0; |
1da177e4 | 1532 | |
1da177e4 | 1533 | if (!video_device) |
d550d98d | 1534 | return; |
1da177e4 | 1535 | |
e6afa0de | 1536 | device = video_device->dev; |
e9dab196 LY |
1537 | bus = video_device->video; |
1538 | input = bus->input; | |
1da177e4 LT |
1539 | |
1540 | switch (event) { | |
4be44fcd | 1541 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8ab58e8e | 1542 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1543 | keycode = KEY_BRIGHTNESS_CYCLE; |
1544 | break; | |
4be44fcd | 1545 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8ab58e8e | 1546 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1547 | keycode = KEY_BRIGHTNESSUP; |
1548 | break; | |
4be44fcd | 1549 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8ab58e8e | 1550 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1551 | keycode = KEY_BRIGHTNESSDOWN; |
1552 | break; | |
70f23fd6 | 1553 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8ab58e8e | 1554 | brightness_switch_event(video_device, event); |
e9dab196 LY |
1555 | keycode = KEY_BRIGHTNESS_ZERO; |
1556 | break; | |
4be44fcd | 1557 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8ab58e8e | 1558 | brightness_switch_event(video_device, event); |
e9dab196 | 1559 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1560 | break; |
1561 | default: | |
1562 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1563 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1564 | break; |
1565 | } | |
e9dab196 | 1566 | |
7761f638 | 1567 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1568 | |
1569 | if (keycode) { | |
1570 | input_report_key(input, keycode, 1); | |
1571 | input_sync(input); | |
1572 | input_report_key(input, keycode, 0); | |
1573 | input_sync(input); | |
1574 | } | |
e9dab196 | 1575 | |
d550d98d | 1576 | return; |
1da177e4 LT |
1577 | } |
1578 | ||
ac7729da RW |
1579 | static int acpi_video_resume(struct notifier_block *nb, |
1580 | unsigned long val, void *ign) | |
863c1490 MG |
1581 | { |
1582 | struct acpi_video_bus *video; | |
1583 | struct acpi_video_device *video_device; | |
1584 | int i; | |
1585 | ||
ac7729da RW |
1586 | switch (val) { |
1587 | case PM_HIBERNATION_PREPARE: | |
1588 | case PM_SUSPEND_PREPARE: | |
1589 | case PM_RESTORE_PREPARE: | |
1590 | return NOTIFY_DONE; | |
1591 | } | |
863c1490 | 1592 | |
ac7729da RW |
1593 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1594 | ||
1595 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1596 | |
1597 | for (i = 0; i < video->attached_count; i++) { | |
1598 | video_device = video->attached_array[i].bind_info; | |
1599 | if (video_device && video_device->backlight) | |
1600 | acpi_video_set_brightness(video_device->backlight); | |
1601 | } | |
ac7729da RW |
1602 | |
1603 | return NOTIFY_OK; | |
863c1490 MG |
1604 | } |
1605 | ||
c504f8cb ZR |
1606 | static acpi_status |
1607 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1608 | void **return_value) | |
1609 | { | |
1610 | struct acpi_device *device = context; | |
1611 | struct acpi_device *sibling; | |
1612 | int result; | |
1613 | ||
1614 | if (handle == device->handle) | |
1615 | return AE_CTRL_TERMINATE; | |
1616 | ||
1617 | result = acpi_bus_get_device(handle, &sibling); | |
1618 | if (result) | |
1619 | return AE_OK; | |
1620 | ||
1621 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1622 | return AE_ALREADY_EXISTS; | |
1623 | ||
1624 | return AE_OK; | |
1625 | } | |
1626 | ||
67b662e1 AL |
1627 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1628 | { | |
99678ed7 HG |
1629 | struct backlight_properties props; |
1630 | struct pci_dev *pdev; | |
1631 | acpi_handle acpi_parent; | |
1632 | struct device *parent = NULL; | |
1633 | int result; | |
1634 | static int count; | |
1635 | char *name; | |
67b662e1 | 1636 | |
0b8db271 AL |
1637 | /* |
1638 | * Do not create backlight device for video output | |
1639 | * device that is not in the enumerated list. | |
1640 | */ | |
1641 | if (!acpi_video_device_in_dod(device)) { | |
1642 | dev_dbg(&device->dev->dev, "not in _DOD list, ignore\n"); | |
1643 | return; | |
1644 | } | |
1645 | ||
99678ed7 HG |
1646 | result = acpi_video_init_brightness(device); |
1647 | if (result) | |
1648 | return; | |
1649 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1650 | if (!name) | |
1651 | return; | |
1652 | count++; | |
67b662e1 | 1653 | |
99678ed7 | 1654 | acpi_get_parent(device->dev->handle, &acpi_parent); |
67b662e1 | 1655 | |
99678ed7 HG |
1656 | pdev = acpi_get_pci_dev(acpi_parent); |
1657 | if (pdev) { | |
1658 | parent = &pdev->dev; | |
1659 | pci_dev_put(pdev); | |
1660 | } | |
67b662e1 | 1661 | |
99678ed7 HG |
1662 | memset(&props, 0, sizeof(struct backlight_properties)); |
1663 | props.type = BACKLIGHT_FIRMWARE; | |
1664 | props.max_brightness = device->brightness->count - 3; | |
1665 | device->backlight = backlight_device_register(name, | |
1666 | parent, | |
1667 | device, | |
1668 | &acpi_backlight_ops, | |
1669 | &props); | |
1670 | kfree(name); | |
1671 | if (IS_ERR(device->backlight)) | |
1672 | return; | |
67b662e1 | 1673 | |
99678ed7 HG |
1674 | /* |
1675 | * Save current brightness level in case we have to restore it | |
1676 | * before acpi_video_device_lcd_set_level() is called next time. | |
1677 | */ | |
1678 | device->backlight->props.brightness = | |
1679 | acpi_video_get_brightness(device->backlight); | |
67b662e1 | 1680 | |
99678ed7 HG |
1681 | device->cooling_dev = thermal_cooling_device_register("LCD", |
1682 | device->dev, &video_cooling_ops); | |
1683 | if (IS_ERR(device->cooling_dev)) { | |
1684 | /* | |
1685 | * Set cooling_dev to NULL so we don't crash trying to free it. | |
1686 | * Also, why the hell we are returning early and not attempt to | |
1687 | * register video output if cooling device registration failed? | |
1688 | * -- dtor | |
1689 | */ | |
1690 | device->cooling_dev = NULL; | |
1691 | return; | |
67b662e1 | 1692 | } |
99678ed7 HG |
1693 | |
1694 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1695 | device->cooling_dev->id); | |
1696 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1697 | &device->cooling_dev->device.kobj, | |
1698 | "thermal_cooling"); | |
1699 | if (result) | |
1700 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1701 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1702 | &device->dev->dev.kobj, "device"); | |
1703 | if (result) | |
1704 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
67b662e1 AL |
1705 | } |
1706 | ||
dce4ec2e AL |
1707 | static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) |
1708 | { | |
1709 | struct acpi_video_device *dev; | |
1710 | union acpi_object *levels; | |
1711 | ||
1712 | mutex_lock(&video->device_list_lock); | |
1713 | list_for_each_entry(dev, &video->video_device_list, entry) { | |
1714 | if (!acpi_video_device_lcd_query_levels(dev, &levels)) | |
1715 | kfree(levels); | |
1716 | } | |
1717 | mutex_unlock(&video->device_list_lock); | |
1718 | } | |
1719 | ||
67b662e1 AL |
1720 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) |
1721 | { | |
1722 | struct acpi_video_device *dev; | |
1723 | ||
53a92ba7 HG |
1724 | if (video->backlight_registered) |
1725 | return 0; | |
1726 | ||
dce4ec2e AL |
1727 | acpi_video_run_bcl_for_osi(video); |
1728 | ||
99678ed7 HG |
1729 | if (!acpi_video_verify_backlight_support()) |
1730 | return 0; | |
1731 | ||
67b662e1 AL |
1732 | mutex_lock(&video->device_list_lock); |
1733 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1734 | acpi_video_dev_register_backlight(dev); | |
1735 | mutex_unlock(&video->device_list_lock); | |
1736 | ||
99678ed7 HG |
1737 | video->backlight_registered = true; |
1738 | ||
67b662e1 AL |
1739 | video->pm_nb.notifier_call = acpi_video_resume; |
1740 | video->pm_nb.priority = 0; | |
1741 | return register_pm_notifier(&video->pm_nb); | |
1742 | } | |
1743 | ||
1744 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1745 | { | |
1746 | if (device->backlight) { | |
1747 | backlight_device_unregister(device->backlight); | |
1748 | device->backlight = NULL; | |
1749 | } | |
1750 | if (device->brightness) { | |
1751 | kfree(device->brightness->levels); | |
1752 | kfree(device->brightness); | |
1753 | device->brightness = NULL; | |
1754 | } | |
1755 | if (device->cooling_dev) { | |
1756 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1757 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1758 | thermal_cooling_device_unregister(device->cooling_dev); | |
1759 | device->cooling_dev = NULL; | |
1760 | } | |
1761 | } | |
1762 | ||
1763 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1764 | { | |
1765 | struct acpi_video_device *dev; | |
99678ed7 HG |
1766 | int error; |
1767 | ||
1768 | if (!video->backlight_registered) | |
1769 | return 0; | |
1770 | ||
1771 | error = unregister_pm_notifier(&video->pm_nb); | |
67b662e1 AL |
1772 | |
1773 | mutex_lock(&video->device_list_lock); | |
1774 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1775 | acpi_video_dev_unregister_backlight(dev); | |
1776 | mutex_unlock(&video->device_list_lock); | |
1777 | ||
99678ed7 HG |
1778 | video->backlight_registered = false; |
1779 | ||
67b662e1 AL |
1780 | return error; |
1781 | } | |
1782 | ||
1783 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1784 | { | |
1785 | acpi_status status; | |
1786 | struct acpi_device *adev = device->dev; | |
1787 | ||
1788 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1789 | acpi_video_device_notify, device); | |
1790 | if (ACPI_FAILURE(status)) | |
1791 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1792 | else | |
1793 | device->flags.notify = 1; | |
1794 | } | |
1795 | ||
1796 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1797 | { | |
1798 | struct input_dev *input; | |
1799 | struct acpi_video_device *dev; | |
1800 | int error; | |
1801 | ||
1802 | video->input = input = input_allocate_device(); | |
1803 | if (!input) { | |
1804 | error = -ENOMEM; | |
1805 | goto out; | |
1806 | } | |
1807 | ||
1808 | error = acpi_video_bus_start_devices(video); | |
1809 | if (error) | |
1810 | goto err_free_input; | |
1811 | ||
1812 | snprintf(video->phys, sizeof(video->phys), | |
1813 | "%s/video/input0", acpi_device_hid(video->device)); | |
1814 | ||
1815 | input->name = acpi_device_name(video->device); | |
1816 | input->phys = video->phys; | |
1817 | input->id.bustype = BUS_HOST; | |
1818 | input->id.product = 0x06; | |
1819 | input->dev.parent = &video->device->dev; | |
1820 | input->evbit[0] = BIT(EV_KEY); | |
1821 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1822 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1823 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1824 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1825 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1826 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1827 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1828 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1829 | ||
1830 | error = input_register_device(input); | |
1831 | if (error) | |
1832 | goto err_stop_dev; | |
1833 | ||
1834 | mutex_lock(&video->device_list_lock); | |
1835 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1836 | acpi_video_dev_add_notify_handler(dev); | |
1837 | mutex_unlock(&video->device_list_lock); | |
1838 | ||
1839 | return 0; | |
1840 | ||
1841 | err_stop_dev: | |
1842 | acpi_video_bus_stop_devices(video); | |
1843 | err_free_input: | |
1844 | input_free_device(input); | |
1845 | video->input = NULL; | |
1846 | out: | |
1847 | return error; | |
1848 | } | |
1849 | ||
1850 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1851 | { | |
1852 | if (dev->flags.notify) { | |
1853 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1854 | acpi_video_device_notify); | |
1855 | dev->flags.notify = 0; | |
1856 | } | |
1857 | } | |
1858 | ||
1859 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1860 | { | |
1861 | struct acpi_video_device *dev; | |
1862 | ||
1863 | mutex_lock(&video->device_list_lock); | |
1864 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1865 | acpi_video_dev_remove_notify_handler(dev); | |
1866 | mutex_unlock(&video->device_list_lock); | |
1867 | ||
1868 | acpi_video_bus_stop_devices(video); | |
1869 | input_unregister_device(video->input); | |
1870 | video->input = NULL; | |
1871 | } | |
1872 | ||
53a92ba7 HG |
1873 | static int acpi_video_backlight_notify(struct notifier_block *nb, |
1874 | unsigned long val, void *bd) | |
1875 | { | |
1876 | struct backlight_device *backlight = bd; | |
1877 | struct acpi_video_bus *video; | |
1878 | ||
1879 | /* acpi_video_verify_backlight_support only cares about raw devices */ | |
1880 | if (backlight->props.type != BACKLIGHT_RAW) | |
1881 | return NOTIFY_DONE; | |
1882 | ||
1883 | video = container_of(nb, struct acpi_video_bus, backlight_nb); | |
1884 | ||
1885 | switch (val) { | |
1886 | case BACKLIGHT_REGISTERED: | |
1887 | if (!acpi_video_verify_backlight_support()) | |
1888 | acpi_video_bus_unregister_backlight(video); | |
1889 | break; | |
1890 | case BACKLIGHT_UNREGISTERED: | |
1891 | acpi_video_bus_register_backlight(video); | |
1892 | break; | |
1893 | } | |
1894 | ||
1895 | return NOTIFY_OK; | |
1896 | } | |
1897 | ||
1898 | static int acpi_video_bus_add_backlight_notify_handler( | |
1899 | struct acpi_video_bus *video) | |
1900 | { | |
1901 | int error; | |
1902 | ||
1903 | video->backlight_nb.notifier_call = acpi_video_backlight_notify; | |
1904 | video->backlight_nb.priority = 0; | |
1905 | error = backlight_register_notifier(&video->backlight_nb); | |
1906 | if (error == 0) | |
1907 | video->backlight_notifier_registered = true; | |
1908 | ||
1909 | return error; | |
1910 | } | |
1911 | ||
1912 | static int acpi_video_bus_remove_backlight_notify_handler( | |
1913 | struct acpi_video_bus *video) | |
1914 | { | |
1915 | if (!video->backlight_notifier_registered) | |
1916 | return 0; | |
1917 | ||
1918 | video->backlight_notifier_registered = false; | |
1919 | ||
1920 | return backlight_unregister_notifier(&video->backlight_nb); | |
1921 | } | |
1922 | ||
67b662e1 AL |
1923 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1924 | { | |
1925 | struct acpi_video_device *dev, *next; | |
1926 | ||
1927 | mutex_lock(&video->device_list_lock); | |
1928 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1929 | list_del(&dev->entry); | |
1930 | kfree(dev); | |
1931 | } | |
1932 | mutex_unlock(&video->device_list_lock); | |
1933 | ||
1934 | return 0; | |
1935 | } | |
1936 | ||
ac7729da RW |
1937 | static int instance; |
1938 | ||
4be44fcd | 1939 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1940 | { |
f51e8391 | 1941 | struct acpi_video_bus *video; |
f51e8391 | 1942 | int error; |
c504f8cb ZR |
1943 | acpi_status status; |
1944 | ||
1945 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1946 | device->parent->handle, 1, | |
1947 | acpi_video_bus_match, NULL, | |
1948 | device, NULL); | |
1949 | if (status == AE_ALREADY_EXISTS) { | |
1950 | printk(KERN_WARNING FW_BUG | |
1951 | "Duplicate ACPI video bus devices for the" | |
1952 | " same VGA controller, please try module " | |
1953 | "parameter \"video.allow_duplicates=1\"" | |
1954 | "if the current driver doesn't work.\n"); | |
1955 | if (!allow_duplicates) | |
1956 | return -ENODEV; | |
1957 | } | |
1da177e4 | 1958 | |
36bcbec7 | 1959 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1960 | if (!video) |
d550d98d | 1961 | return -ENOMEM; |
1da177e4 | 1962 | |
e6d9da1d ZR |
1963 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1964 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1965 | if (instance) | |
1966 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1967 | instance++; |
e6d9da1d | 1968 | } |
f3b39f13 ZY |
1969 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1970 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1971 | if (instance) | |
1972 | device->pnp.bus_id[3] = '0' + instance; | |
1973 | instance++; | |
1974 | } | |
e6d9da1d | 1975 | |
e6afa0de | 1976 | video->device = device; |
1da177e4 LT |
1977 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1978 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1979 | device->driver_data = video; |
1da177e4 LT |
1980 | |
1981 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1982 | error = acpi_video_bus_check(video); |
1983 | if (error) | |
1984 | goto err_free_video; | |
1da177e4 | 1985 | |
bbac81f5 | 1986 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1987 | INIT_LIST_HEAD(&video->video_device_list); |
1988 | ||
ea9f8856 IM |
1989 | error = acpi_video_bus_get_devices(video, device); |
1990 | if (error) | |
91e13aa3 | 1991 | goto err_put_video; |
1da177e4 | 1992 | |
1da177e4 | 1993 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1994 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1995 | video->flags.multihead ? "yes" : "no", | |
1996 | video->flags.rom ? "yes" : "no", | |
1997 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1998 | mutex_lock(&video_list_lock); |
1999 | list_add_tail(&video->entry, &video_bus_head); | |
2000 | mutex_unlock(&video_list_lock); | |
1da177e4 | 2001 | |
67b662e1 AL |
2002 | acpi_video_bus_register_backlight(video); |
2003 | acpi_video_bus_add_notify_handler(video); | |
53a92ba7 | 2004 | acpi_video_bus_add_backlight_notify_handler(video); |
ac7729da | 2005 | |
f51e8391 DT |
2006 | return 0; |
2007 | ||
67b662e1 | 2008 | err_put_video: |
f51e8391 DT |
2009 | acpi_video_bus_put_devices(video); |
2010 | kfree(video->attached_array); | |
67b662e1 | 2011 | err_free_video: |
f51e8391 | 2012 | kfree(video); |
db89b4f0 | 2013 | device->driver_data = NULL; |
1da177e4 | 2014 | |
f51e8391 | 2015 | return error; |
1da177e4 LT |
2016 | } |
2017 | ||
51fac838 | 2018 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 2019 | { |
4be44fcd | 2020 | struct acpi_video_bus *video = NULL; |
1da177e4 | 2021 | |
1da177e4 LT |
2022 | |
2023 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 2024 | return -EINVAL; |
1da177e4 | 2025 | |
50dd0969 | 2026 | video = acpi_driver_data(device); |
1da177e4 | 2027 | |
53a92ba7 | 2028 | acpi_video_bus_remove_backlight_notify_handler(video); |
67b662e1 AL |
2029 | acpi_video_bus_remove_notify_handler(video); |
2030 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 2031 | acpi_video_bus_put_devices(video); |
1da177e4 | 2032 | |
67b662e1 AL |
2033 | mutex_lock(&video_list_lock); |
2034 | list_del(&video->entry); | |
2035 | mutex_unlock(&video_list_lock); | |
2036 | ||
6044ec88 | 2037 | kfree(video->attached_array); |
1da177e4 LT |
2038 | kfree(video); |
2039 | ||
d550d98d | 2040 | return 0; |
1da177e4 LT |
2041 | } |
2042 | ||
c6996bdd AC |
2043 | static int __init is_i740(struct pci_dev *dev) |
2044 | { | |
2045 | if (dev->device == 0x00D1) | |
2046 | return 1; | |
2047 | if (dev->device == 0x7000) | |
2048 | return 1; | |
2049 | return 0; | |
2050 | } | |
2051 | ||
74a365b3 MG |
2052 | static int __init intel_opregion_present(void) |
2053 | { | |
c6996bdd | 2054 | int opregion = 0; |
74a365b3 MG |
2055 | struct pci_dev *dev = NULL; |
2056 | u32 address; | |
2057 | ||
2058 | for_each_pci_dev(dev) { | |
2059 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2060 | continue; | |
2061 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2062 | continue; | |
c6996bdd AC |
2063 | /* We don't want to poke around undefined i740 registers */ |
2064 | if (is_i740(dev)) | |
2065 | continue; | |
74a365b3 MG |
2066 | pci_read_config_dword(dev, 0xfc, &address); |
2067 | if (!address) | |
2068 | continue; | |
c6996bdd | 2069 | opregion = 1; |
74a365b3 | 2070 | } |
c6996bdd | 2071 | return opregion; |
74a365b3 MG |
2072 | } |
2073 | ||
8e5c2b77 | 2074 | int acpi_video_register(void) |
1da177e4 | 2075 | { |
8e5c2b77 | 2076 | int result = 0; |
86e437f0 ZY |
2077 | if (register_count) { |
2078 | /* | |
8e5c2b77 RW |
2079 | * if the function of acpi_video_register is already called, |
2080 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
2081 | */ |
2082 | return 0; | |
2083 | } | |
1da177e4 | 2084 | |
67b662e1 AL |
2085 | mutex_init(&video_list_lock); |
2086 | INIT_LIST_HEAD(&video_bus_head); | |
2087 | ||
1da177e4 | 2088 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 2089 | if (result < 0) |
d550d98d | 2090 | return -ENODEV; |
1da177e4 | 2091 | |
86e437f0 ZY |
2092 | /* |
2093 | * When the acpi_video_bus is loaded successfully, increase | |
2094 | * the counter reference. | |
2095 | */ | |
2096 | register_count = 1; | |
2097 | ||
d550d98d | 2098 | return 0; |
1da177e4 | 2099 | } |
8e5c2b77 | 2100 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2101 | |
86e437f0 ZY |
2102 | void acpi_video_unregister(void) |
2103 | { | |
2104 | if (!register_count) { | |
2105 | /* | |
2106 | * If the acpi video bus is already unloaded, don't | |
2107 | * unload it again and return directly. | |
2108 | */ | |
2109 | return; | |
2110 | } | |
2111 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2112 | ||
86e437f0 ZY |
2113 | register_count = 0; |
2114 | ||
2115 | return; | |
2116 | } | |
2117 | EXPORT_SYMBOL(acpi_video_unregister); | |
2118 | ||
1b7f37e1 HG |
2119 | void acpi_video_unregister_backlight(void) |
2120 | { | |
2121 | struct acpi_video_bus *video; | |
2122 | ||
2123 | if (!register_count) | |
2124 | return; | |
2125 | ||
2126 | mutex_lock(&video_list_lock); | |
2127 | list_for_each_entry(video, &video_bus_head, entry) | |
2128 | acpi_video_bus_unregister_backlight(video); | |
2129 | mutex_unlock(&video_list_lock); | |
2130 | } | |
2131 | EXPORT_SYMBOL(acpi_video_unregister_backlight); | |
2132 | ||
74a365b3 MG |
2133 | /* |
2134 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2135 | * the video opregion code to be run first in order to initialise | |
2136 | * state before any ACPI video calls are made. To handle this we defer | |
2137 | * registration of the video class until the opregion code has run. | |
2138 | */ | |
2139 | ||
2140 | static int __init acpi_video_init(void) | |
2141 | { | |
45cb50e6 ZR |
2142 | dmi_check_system(video_dmi_table); |
2143 | ||
74a365b3 MG |
2144 | if (intel_opregion_present()) |
2145 | return 0; | |
2146 | ||
2147 | return acpi_video_register(); | |
2148 | } | |
1da177e4 | 2149 | |
86e437f0 | 2150 | static void __exit acpi_video_exit(void) |
1da177e4 | 2151 | { |
86e437f0 | 2152 | acpi_video_unregister(); |
1da177e4 | 2153 | |
d550d98d | 2154 | return; |
1da177e4 LT |
2155 | } |
2156 | ||
2157 | module_init(acpi_video_init); | |
2158 | module_exit(acpi_video_exit); |