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 | ||
90ab5ee9 | 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 | */ |
0e9f81d3 AL |
85 | static int use_native_backlight_param = -1; |
86 | module_param_named(use_native_backlight, use_native_backlight_param, int, 0444); | |
87 | static bool use_native_backlight_dmi = false; | |
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; |
4be44fcd | 153 | u8 dos_setting; |
1da177e4 | 154 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
155 | u8 attached_count; |
156 | struct acpi_video_bus_cap cap; | |
1da177e4 | 157 | struct acpi_video_bus_flags flags; |
4be44fcd | 158 | struct list_head video_device_list; |
bbac81f5 | 159 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 160 | struct list_head entry; |
e9dab196 LY |
161 | struct input_dev *input; |
162 | char phys[32]; /* for input device */ | |
ac7729da | 163 | struct notifier_block pm_nb; |
1da177e4 LT |
164 | }; |
165 | ||
166 | struct acpi_video_device_flags { | |
4be44fcd LB |
167 | u8 crt:1; |
168 | u8 lcd:1; | |
169 | u8 tvout:1; | |
82cae999 | 170 | u8 dvi:1; |
4be44fcd LB |
171 | u8 bios:1; |
172 | u8 unknown:1; | |
91e13aa3 AL |
173 | u8 notify:1; |
174 | u8 reserved:1; | |
1da177e4 LT |
175 | }; |
176 | ||
177 | struct acpi_video_device_cap { | |
21fcb34e FC |
178 | u8 _ADR:1; /* Return the unique ID */ |
179 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
180 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 181 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 182 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 183 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
184 | }; |
185 | ||
d32f6947 ZR |
186 | struct acpi_video_brightness_flags { |
187 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 188 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 189 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
190 | }; |
191 | ||
1da177e4 | 192 | struct acpi_video_device_brightness { |
4be44fcd LB |
193 | int curr; |
194 | int count; | |
195 | int *levels; | |
d32f6947 | 196 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
197 | }; |
198 | ||
199 | struct acpi_video_device { | |
4be44fcd LB |
200 | unsigned long device_id; |
201 | struct acpi_video_device_flags flags; | |
202 | struct acpi_video_device_cap cap; | |
203 | struct list_head entry; | |
204 | struct acpi_video_bus *video; | |
205 | struct acpi_device *dev; | |
1da177e4 | 206 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 207 | struct backlight_device *backlight; |
4a703a8f | 208 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
209 | }; |
210 | ||
b7171ae7 | 211 | static const char device_decode[][30] = { |
1da177e4 LT |
212 | "motherboard VGA device", |
213 | "PCI VGA device", | |
214 | "AGP VGA device", | |
215 | "UNKNOWN", | |
216 | }; | |
217 | ||
4be44fcd LB |
218 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
219 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
220 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
221 | struct acpi_video_device *device); | |
1da177e4 | 222 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
223 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
224 | int level); | |
225 | static int acpi_video_device_lcd_get_level_current( | |
226 | struct acpi_video_device *device, | |
a89803df | 227 | unsigned long long *level, bool raw); |
4be44fcd LB |
228 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
229 | u32 level_current, u32 event); | |
c8890f90 | 230 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 231 | int event); |
1da177e4 | 232 | |
0e9f81d3 AL |
233 | static bool acpi_video_use_native_backlight(void) |
234 | { | |
235 | if (use_native_backlight_param != -1) | |
236 | return use_native_backlight_param; | |
237 | else | |
238 | return use_native_backlight_dmi; | |
239 | } | |
240 | ||
fbc9fe1b AL |
241 | static bool acpi_video_verify_backlight_support(void) |
242 | { | |
0e9f81d3 | 243 | if (acpi_osi_is_win8() && acpi_video_use_native_backlight() && |
fbc9fe1b AL |
244 | backlight_device_registered(BACKLIGHT_RAW)) |
245 | return false; | |
246 | return acpi_video_backlight_support(); | |
247 | } | |
248 | ||
21fcb34e | 249 | /* backlight device sysfs support */ |
2f3d000a YL |
250 | static int acpi_video_get_brightness(struct backlight_device *bd) |
251 | { | |
27663c58 | 252 | unsigned long long cur_level; |
38531e6f | 253 | int i; |
7c364e79 | 254 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 255 | |
a89803df | 256 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 257 | return -EINVAL; |
38531e6f MG |
258 | for (i = 2; i < vd->brightness->count; i++) { |
259 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
260 | /* |
261 | * The first two entries are special - see page 575 | |
262 | * of the ACPI spec 3.0 | |
263 | */ | |
915ea7e4 | 264 | return i - 2; |
38531e6f MG |
265 | } |
266 | return 0; | |
2f3d000a YL |
267 | } |
268 | ||
269 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
270 | { | |
24450c7a | 271 | int request_level = bd->props.brightness + 2; |
7c364e79 | 272 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a ZR |
273 | |
274 | return acpi_video_device_lcd_set_level(vd, | |
275 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
276 | } |
277 | ||
acc2472e | 278 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
279 | .get_brightness = acpi_video_get_brightness, |
280 | .update_status = acpi_video_set_brightness, | |
281 | }; | |
282 | ||
702ed512 | 283 | /* thermal cooling device callbacks */ |
4a703a8f | 284 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 285 | long *state) |
702ed512 | 286 | { |
4a703a8f | 287 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
288 | struct acpi_video_device *video = acpi_driver_data(device); |
289 | ||
6503e5df MG |
290 | *state = video->brightness->count - 3; |
291 | return 0; | |
702ed512 ZR |
292 | } |
293 | ||
4a703a8f | 294 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 295 | long *state) |
702ed512 | 296 | { |
4a703a8f | 297 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 298 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 299 | unsigned long long level; |
6503e5df | 300 | int offset; |
702ed512 | 301 | |
a89803df | 302 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 303 | return -EINVAL; |
6503e5df MG |
304 | for (offset = 2; offset < video->brightness->count; offset++) |
305 | if (level == video->brightness->levels[offset]) { | |
306 | *state = video->brightness->count - offset - 1; | |
307 | return 0; | |
308 | } | |
702ed512 ZR |
309 | |
310 | return -EINVAL; | |
311 | } | |
312 | ||
313 | static int | |
4a703a8f | 314 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 315 | { |
4a703a8f | 316 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
317 | struct acpi_video_device *video = acpi_driver_data(device); |
318 | int level; | |
319 | ||
915ea7e4 | 320 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
321 | return -EINVAL; |
322 | ||
323 | state = video->brightness->count - state; | |
915ea7e4 | 324 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
325 | return acpi_video_device_lcd_set_level(video, level); |
326 | } | |
327 | ||
9c8b04be | 328 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
329 | .get_max_state = video_get_max_state, |
330 | .get_cur_state = video_get_cur_state, | |
331 | .set_cur_state = video_set_cur_state, | |
332 | }; | |
333 | ||
21fcb34e FC |
334 | /* |
335 | * -------------------------------------------------------------------------- | |
336 | * Video Management | |
337 | * -------------------------------------------------------------------------- | |
338 | */ | |
1da177e4 | 339 | |
1da177e4 | 340 | static int |
4be44fcd LB |
341 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
342 | union acpi_object **levels) | |
1da177e4 | 343 | { |
4be44fcd LB |
344 | int status; |
345 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
346 | union acpi_object *obj; | |
1da177e4 | 347 | |
1da177e4 LT |
348 | |
349 | *levels = NULL; | |
350 | ||
90130268 | 351 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 352 | if (!ACPI_SUCCESS(status)) |
d550d98d | 353 | return status; |
4be44fcd | 354 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 355 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 356 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
357 | status = -EFAULT; |
358 | goto err; | |
359 | } | |
360 | ||
361 | *levels = obj; | |
362 | ||
d550d98d | 363 | return 0; |
1da177e4 | 364 | |
915ea7e4 | 365 | err: |
6044ec88 | 366 | kfree(buffer.pointer); |
1da177e4 | 367 | |
d550d98d | 368 | return status; |
1da177e4 LT |
369 | } |
370 | ||
371 | static int | |
4be44fcd | 372 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 373 | { |
24450c7a | 374 | int status; |
9e6dada9 | 375 | int state; |
1da177e4 | 376 | |
0db98202 JL |
377 | status = acpi_execute_simple_method(device->dev->handle, |
378 | "_BCM", level); | |
24450c7a ZR |
379 | if (ACPI_FAILURE(status)) { |
380 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
381 | return -EIO; | |
382 | } | |
383 | ||
4500ca8e | 384 | device->brightness->curr = level; |
9e6dada9 | 385 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 386 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
387 | if (device->backlight) |
388 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
389 | return 0; |
390 | } | |
9e6dada9 | 391 | |
24450c7a ZR |
392 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
393 | return -EINVAL; | |
1da177e4 LT |
394 | } |
395 | ||
45cb50e6 ZR |
396 | /* |
397 | * For some buggy _BQC methods, we need to add a constant value to | |
398 | * the _BQC return value to get the actual current brightness level | |
399 | */ | |
400 | ||
401 | static int bqc_offset_aml_bug_workaround; | |
402 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
403 | { | |
404 | bqc_offset_aml_bug_workaround = 9; | |
405 | return 0; | |
406 | } | |
407 | ||
0e9f81d3 AL |
408 | static int __init video_set_use_native_backlight(const struct dmi_system_id *d) |
409 | { | |
410 | use_native_backlight_dmi = true; | |
411 | return 0; | |
412 | } | |
413 | ||
45cb50e6 ZR |
414 | static struct dmi_system_id video_dmi_table[] __initdata = { |
415 | /* | |
416 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
417 | */ | |
418 | { | |
419 | .callback = video_set_bqc_offset, | |
420 | .ident = "Acer Aspire 5720", | |
421 | .matches = { | |
422 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
423 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
424 | }, | |
425 | }, | |
5afc4abe LB |
426 | { |
427 | .callback = video_set_bqc_offset, | |
428 | .ident = "Acer Aspire 5710Z", | |
429 | .matches = { | |
430 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
431 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
432 | }, | |
433 | }, | |
34ac272b ZR |
434 | { |
435 | .callback = video_set_bqc_offset, | |
436 | .ident = "eMachines E510", | |
437 | .matches = { | |
438 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
439 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
440 | }, | |
441 | }, | |
93bcece2 ZR |
442 | { |
443 | .callback = video_set_bqc_offset, | |
444 | .ident = "Acer Aspire 5315", | |
445 | .matches = { | |
446 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
447 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
448 | }, | |
449 | }, | |
152a4e63 ZR |
450 | { |
451 | .callback = video_set_bqc_offset, | |
452 | .ident = "Acer Aspire 7720", | |
453 | .matches = { | |
454 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
455 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
456 | }, | |
457 | }, | |
0e9f81d3 AL |
458 | { |
459 | .callback = video_set_use_native_backlight, | |
43d94902 | 460 | .ident = "ThinkPad T430 and T430s", |
0e9f81d3 AL |
461 | .matches = { |
462 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
43d94902 | 463 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430"), |
0e9f81d3 AL |
464 | }, |
465 | }, | |
466 | { | |
467 | .callback = video_set_use_native_backlight, | |
468 | .ident = "ThinkPad X230", | |
469 | .matches = { | |
470 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
471 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"), | |
472 | }, | |
473 | }, | |
43d94902 HG |
474 | { |
475 | .callback = video_set_use_native_backlight, | |
476 | .ident = "ThinkPad T530", | |
477 | .matches = { | |
478 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
479 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T530"), | |
480 | }, | |
481 | }, | |
0e9f81d3 AL |
482 | { |
483 | .callback = video_set_use_native_backlight, | |
484 | .ident = "ThinkPad X1 Carbon", | |
485 | .matches = { | |
486 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
487 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"), | |
488 | }, | |
489 | }, | |
490 | { | |
491 | .callback = video_set_use_native_backlight, | |
492 | .ident = "Lenovo Yoga 13", | |
493 | .matches = { | |
494 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
495 | DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"), | |
496 | }, | |
497 | }, | |
997dd7fe SCP |
498 | { |
499 | .callback = video_set_use_native_backlight, | |
500 | .ident = "Thinkpad Helix", | |
501 | .matches = { | |
502 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
503 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"), | |
504 | }, | |
505 | }, | |
0e9f81d3 AL |
506 | { |
507 | .callback = video_set_use_native_backlight, | |
508 | .ident = "Dell Inspiron 7520", | |
509 | .matches = { | |
510 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
511 | DMI_MATCH(DMI_PRODUCT_VERSION, "Inspiron 7520"), | |
512 | }, | |
513 | }, | |
514 | { | |
515 | .callback = video_set_use_native_backlight, | |
516 | .ident = "Acer Aspire 5733Z", | |
517 | .matches = { | |
518 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
519 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5733Z"), | |
520 | }, | |
521 | }, | |
43d94902 HG |
522 | { |
523 | .callback = video_set_use_native_backlight, | |
524 | .ident = "Acer Aspire 5742G", | |
525 | .matches = { | |
526 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
527 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5742G"), | |
528 | }, | |
529 | }, | |
0e9f81d3 AL |
530 | { |
531 | .callback = video_set_use_native_backlight, | |
532 | .ident = "Acer Aspire V5-431", | |
533 | .matches = { | |
534 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
535 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-431"), | |
536 | }, | |
537 | }, | |
538 | { | |
539 | .callback = video_set_use_native_backlight, | |
540 | .ident = "HP ProBook 4340s", | |
541 | .matches = { | |
542 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
543 | DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4340s"), | |
544 | }, | |
545 | }, | |
546 | { | |
547 | .callback = video_set_use_native_backlight, | |
548 | .ident = "HP ProBook 2013 models", | |
549 | .matches = { | |
550 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
551 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook "), | |
552 | DMI_MATCH(DMI_PRODUCT_NAME, " G1"), | |
553 | }, | |
554 | }, | |
555 | { | |
556 | .callback = video_set_use_native_backlight, | |
557 | .ident = "HP EliteBook 2013 models", | |
558 | .matches = { | |
559 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
560 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "), | |
561 | DMI_MATCH(DMI_PRODUCT_NAME, " G1"), | |
562 | }, | |
563 | }, | |
564 | { | |
565 | .callback = video_set_use_native_backlight, | |
566 | .ident = "HP ZBook 14", | |
567 | .matches = { | |
568 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
569 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 14"), | |
570 | }, | |
571 | }, | |
572 | { | |
573 | .callback = video_set_use_native_backlight, | |
574 | .ident = "HP ZBook 15", | |
575 | .matches = { | |
576 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
577 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 15"), | |
578 | }, | |
579 | }, | |
580 | { | |
581 | .callback = video_set_use_native_backlight, | |
582 | .ident = "HP ZBook 17", | |
583 | .matches = { | |
584 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
585 | DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 17"), | |
586 | }, | |
587 | }, | |
588 | { | |
589 | .callback = video_set_use_native_backlight, | |
590 | .ident = "HP EliteBook 8780w", | |
591 | .matches = { | |
592 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
593 | DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"), | |
594 | }, | |
595 | }, | |
45cb50e6 ZR |
596 | {} |
597 | }; | |
598 | ||
994fa63c DB |
599 | static unsigned long long |
600 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
601 | unsigned long long bqc_value) | |
602 | { | |
603 | unsigned long long level; | |
604 | ||
605 | if (device->brightness->flags._BQC_use_index) { | |
606 | /* | |
607 | * _BQC returns an index that doesn't account for | |
608 | * the first 2 items with special meaning, so we need | |
609 | * to compensate for that by offsetting ourselves | |
610 | */ | |
611 | if (device->brightness->flags._BCL_reversed) | |
612 | bqc_value = device->brightness->count - 3 - bqc_value; | |
613 | ||
614 | level = device->brightness->levels[bqc_value + 2]; | |
615 | } else { | |
616 | level = bqc_value; | |
617 | } | |
618 | ||
619 | level += bqc_offset_aml_bug_workaround; | |
620 | ||
621 | return level; | |
622 | } | |
623 | ||
1da177e4 | 624 | static int |
4be44fcd | 625 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 626 | unsigned long long *level, bool raw) |
1da177e4 | 627 | { |
c8890f90 | 628 | acpi_status status = AE_OK; |
4e231fa4 | 629 | int i; |
c8890f90 | 630 | |
c60d638e ZR |
631 | if (device->cap._BQC || device->cap._BCQ) { |
632 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
633 | ||
634 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
635 | NULL, level); |
636 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
637 | if (raw) { |
638 | /* | |
639 | * Caller has indicated he wants the raw | |
640 | * value returned by _BQC, so don't furtherly | |
641 | * mess with the value. | |
642 | */ | |
643 | return 0; | |
644 | } | |
645 | ||
994fa63c | 646 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 647 | |
4e231fa4 VS |
648 | for (i = 2; i < device->brightness->count; i++) |
649 | if (device->brightness->levels[i] == *level) { | |
650 | device->brightness->curr = *level; | |
651 | return 0; | |
915ea7e4 | 652 | } |
a89803df DB |
653 | /* |
654 | * BQC returned an invalid level. | |
655 | * Stop using it. | |
656 | */ | |
657 | ACPI_WARNING((AE_INFO, | |
658 | "%s returned an invalid level", | |
659 | buf)); | |
660 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 661 | } else { |
21fcb34e FC |
662 | /* |
663 | * Fixme: | |
c8890f90 ZR |
664 | * should we return an error or ignore this failure? |
665 | * dev->brightness->curr is a cached value which stores | |
666 | * the correct current backlight level in most cases. | |
667 | * ACPI video backlight still works w/ buggy _BQC. | |
668 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
669 | */ | |
c60d638e ZR |
670 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
671 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
672 | } |
673 | } | |
674 | ||
4500ca8e | 675 | *level = device->brightness->curr; |
c8890f90 | 676 | return 0; |
1da177e4 LT |
677 | } |
678 | ||
679 | static int | |
4be44fcd LB |
680 | acpi_video_device_EDID(struct acpi_video_device *device, |
681 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 682 | { |
4be44fcd LB |
683 | int status; |
684 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
685 | union acpi_object *obj; | |
686 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
687 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 688 | |
1da177e4 LT |
689 | |
690 | *edid = NULL; | |
691 | ||
692 | if (!device) | |
d550d98d | 693 | return -ENODEV; |
1da177e4 LT |
694 | if (length == 128) |
695 | arg0.integer.value = 1; | |
696 | else if (length == 256) | |
697 | arg0.integer.value = 2; | |
698 | else | |
d550d98d | 699 | return -EINVAL; |
1da177e4 | 700 | |
90130268 | 701 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 702 | if (ACPI_FAILURE(status)) |
d550d98d | 703 | return -ENODEV; |
1da177e4 | 704 | |
50dd0969 | 705 | obj = buffer.pointer; |
1da177e4 LT |
706 | |
707 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
708 | *edid = obj; | |
709 | else { | |
6468463a | 710 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
711 | status = -EFAULT; |
712 | kfree(obj); | |
713 | } | |
714 | ||
d550d98d | 715 | return status; |
1da177e4 LT |
716 | } |
717 | ||
1da177e4 LT |
718 | /* bus */ |
719 | ||
1da177e4 LT |
720 | /* |
721 | * Arg: | |
21fcb34e FC |
722 | * video : video bus device pointer |
723 | * bios_flag : | |
1da177e4 LT |
724 | * 0. The system BIOS should NOT automatically switch(toggle) |
725 | * the active display output. | |
726 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 727 | * active display output. No switch event. |
1da177e4 LT |
728 | * 2. The _DGS value should be locked. |
729 | * 3. The system BIOS should not automatically switch (toggle) the | |
730 | * active display output, but instead generate the display switch | |
731 | * event notify code. | |
732 | * lcd_flag : | |
733 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 734 | * of the LCD when the power changes from AC to DC |
21fcb34e | 735 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 736 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 737 | * Return Value: |
ea9f8856 | 738 | * -EINVAL wrong arg. |
1da177e4 LT |
739 | */ |
740 | ||
741 | static int | |
4be44fcd | 742 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 743 | { |
ea9f8856 | 744 | acpi_status status; |
1da177e4 | 745 | |
b0373843 ZR |
746 | if (!video->cap._DOS) |
747 | return 0; | |
1da177e4 | 748 | |
ea9f8856 IM |
749 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
750 | return -EINVAL; | |
0db98202 JL |
751 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
752 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
753 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
754 | if (ACPI_FAILURE(status)) |
755 | return -EIO; | |
1da177e4 | 756 | |
ea9f8856 | 757 | return 0; |
1da177e4 LT |
758 | } |
759 | ||
935e5f29 ZR |
760 | /* |
761 | * Simple comparison function used to sort backlight levels. | |
762 | */ | |
763 | ||
764 | static int | |
765 | acpi_video_cmp_level(const void *a, const void *b) | |
766 | { | |
767 | return *(int *)a - *(int *)b; | |
768 | } | |
769 | ||
a50188da AL |
770 | /* |
771 | * Decides if _BQC/_BCQ for this system is usable | |
772 | * | |
773 | * We do this by changing the level first and then read out the current | |
774 | * brightness level, if the value does not match, find out if it is using | |
775 | * index. If not, clear the _BQC/_BCQ capability. | |
776 | */ | |
777 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
778 | int max_level, int current_level) | |
779 | { | |
780 | struct acpi_video_device_brightness *br = device->brightness; | |
781 | int result; | |
782 | unsigned long long level; | |
783 | int test_level; | |
784 | ||
785 | /* don't mess with existing known broken systems */ | |
786 | if (bqc_offset_aml_bug_workaround) | |
787 | return 0; | |
788 | ||
789 | /* | |
790 | * Some systems always report current brightness level as maximum | |
791 | * through _BQC, we need to test another value for them. | |
792 | */ | |
b3b301c5 | 793 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
794 | |
795 | result = acpi_video_device_lcd_set_level(device, test_level); | |
796 | if (result) | |
797 | return result; | |
798 | ||
799 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
800 | if (result) | |
801 | return result; | |
802 | ||
803 | if (level != test_level) { | |
804 | /* buggy _BQC found, need to find out if it uses index */ | |
805 | if (level < br->count) { | |
806 | if (br->flags._BCL_reversed) | |
807 | level = br->count - 3 - level; | |
808 | if (br->levels[level + 2] == test_level) | |
809 | br->flags._BQC_use_index = 1; | |
810 | } | |
811 | ||
812 | if (!br->flags._BQC_use_index) | |
813 | device->cap._BQC = device->cap._BCQ = 0; | |
814 | } | |
815 | ||
816 | return 0; | |
817 | } | |
818 | ||
819 | ||
1da177e4 | 820 | /* |
21fcb34e FC |
821 | * Arg: |
822 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
823 | * |
824 | * Return Value: | |
469778c1 JJ |
825 | * Maximum brightness level |
826 | * | |
827 | * Allocate and initialize device->brightness. | |
828 | */ | |
829 | ||
830 | static int | |
831 | acpi_video_init_brightness(struct acpi_video_device *device) | |
832 | { | |
833 | union acpi_object *obj = NULL; | |
d32f6947 | 834 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 835 | unsigned long long level, level_old; |
469778c1 JJ |
836 | union acpi_object *o; |
837 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 838 | int result = -EINVAL; |
bd8ba205 | 839 | u32 value; |
469778c1 JJ |
840 | |
841 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
842 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
843 | "LCD brightness level\n")); | |
844 | goto out; | |
845 | } | |
846 | ||
847 | if (obj->package.count < 2) | |
848 | goto out; | |
849 | ||
850 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
851 | if (!br) { | |
852 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 853 | result = -ENOMEM; |
469778c1 JJ |
854 | goto out; |
855 | } | |
856 | ||
d32f6947 | 857 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 858 | GFP_KERNEL); |
1a7c618a ZR |
859 | if (!br->levels) { |
860 | result = -ENOMEM; | |
469778c1 | 861 | goto out_free; |
1a7c618a | 862 | } |
469778c1 JJ |
863 | |
864 | for (i = 0; i < obj->package.count; i++) { | |
865 | o = (union acpi_object *)&obj->package.elements[i]; | |
866 | if (o->type != ACPI_TYPE_INTEGER) { | |
867 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
868 | continue; | |
869 | } | |
bd8ba205 HG |
870 | value = (u32) o->integer.value; |
871 | /* Skip duplicate entries */ | |
872 | if (count > 2 && br->levels[count - 1] == value) | |
873 | continue; | |
874 | ||
875 | br->levels[count] = value; | |
469778c1 JJ |
876 | |
877 | if (br->levels[count] > max_level) | |
878 | max_level = br->levels[count]; | |
879 | count++; | |
880 | } | |
881 | ||
d32f6947 ZR |
882 | /* |
883 | * some buggy BIOS don't export the levels | |
884 | * when machine is on AC/Battery in _BCL package. | |
885 | * In this case, the first two elements in _BCL packages | |
886 | * are also supported brightness levels that OS should take care of. | |
887 | */ | |
90af2cf6 ZR |
888 | for (i = 2; i < count; i++) { |
889 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 890 | level_ac_battery++; |
90af2cf6 ZR |
891 | if (br->levels[i] == br->levels[1]) |
892 | level_ac_battery++; | |
893 | } | |
d32f6947 ZR |
894 | |
895 | if (level_ac_battery < 2) { | |
896 | level_ac_battery = 2 - level_ac_battery; | |
897 | br->flags._BCL_no_ac_battery_levels = 1; | |
898 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
899 | br->levels[i] = br->levels[i - level_ac_battery]; | |
900 | count += level_ac_battery; | |
901 | } else if (level_ac_battery > 2) | |
bf6787eb | 902 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 903 | |
d80fb99f ZR |
904 | /* Check if the _BCL package is in a reversed order */ |
905 | if (max_level == br->levels[2]) { | |
906 | br->flags._BCL_reversed = 1; | |
907 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
908 | acpi_video_cmp_level, NULL); | |
909 | } else if (max_level != br->levels[count - 1]) | |
910 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 911 | "Found unordered _BCL package")); |
469778c1 JJ |
912 | |
913 | br->count = count; | |
914 | device->brightness = br; | |
1a7c618a | 915 | |
1a7c618a | 916 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 917 | br->curr = level = max_level; |
e047cca6 ZR |
918 | |
919 | if (!device->cap._BQC) | |
920 | goto set_level; | |
921 | ||
a89803df DB |
922 | result = acpi_video_device_lcd_get_level_current(device, |
923 | &level_old, true); | |
1a7c618a ZR |
924 | if (result) |
925 | goto out_free_levels; | |
926 | ||
a50188da | 927 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
928 | if (result) |
929 | goto out_free_levels; | |
a50188da AL |
930 | /* |
931 | * cap._BQC may get cleared due to _BQC is found to be broken | |
932 | * in acpi_video_bqc_quirk, so check again here. | |
933 | */ | |
934 | if (!device->cap._BQC) | |
935 | goto set_level; | |
e047cca6 | 936 | |
545ef368 AL |
937 | level = acpi_video_bqc_value_to_level(device, level_old); |
938 | /* | |
939 | * On some buggy laptops, _BQC returns an uninitialized | |
940 | * value when invoked for the first time, i.e. | |
941 | * level_old is invalid (no matter whether it's a level | |
942 | * or an index). Set the backlight to max_level in this case. | |
943 | */ | |
944 | for (i = 2; i < br->count; i++) | |
945 | if (level == br->levels[i]) | |
946 | break; | |
947 | if (i == br->count || !level) | |
948 | level = max_level; | |
e047cca6 | 949 | |
e047cca6 | 950 | set_level: |
90c53ca4 | 951 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
952 | if (result) |
953 | goto out_free_levels; | |
1a7c618a | 954 | |
d32f6947 ZR |
955 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
956 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 957 | kfree(obj); |
1a7c618a | 958 | return result; |
469778c1 JJ |
959 | |
960 | out_free_levels: | |
961 | kfree(br->levels); | |
962 | out_free: | |
963 | kfree(br); | |
964 | out: | |
965 | device->brightness = NULL; | |
966 | kfree(obj); | |
1a7c618a | 967 | return result; |
469778c1 JJ |
968 | } |
969 | ||
970 | /* | |
971 | * Arg: | |
972 | * device : video output device (LCD, CRT, ..) | |
973 | * | |
974 | * Return Value: | |
21fcb34e | 975 | * None |
1da177e4 | 976 | * |
98fb8fe1 | 977 | * Find out all required AML methods defined under the output |
1da177e4 LT |
978 | * device. |
979 | */ | |
980 | ||
4be44fcd | 981 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 982 | { |
952c63e9 | 983 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 984 | device->cap._ADR = 1; |
952c63e9 | 985 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 986 | device->cap._BCL = 1; |
952c63e9 | 987 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 988 | device->cap._BCM = 1; |
952c63e9 | 989 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 990 | device->cap._BQC = 1; |
952c63e9 | 991 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
992 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
993 | device->cap._BCQ = 1; | |
994 | } | |
995 | ||
952c63e9 | 996 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 997 | device->cap._DDC = 1; |
1da177e4 LT |
998 | } |
999 | ||
1000 | /* | |
21fcb34e FC |
1001 | * Arg: |
1002 | * device : video output device (VGA) | |
1da177e4 LT |
1003 | * |
1004 | * Return Value: | |
21fcb34e | 1005 | * None |
1da177e4 | 1006 | * |
98fb8fe1 | 1007 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
1008 | */ |
1009 | ||
4be44fcd | 1010 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 1011 | { |
952c63e9 | 1012 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 1013 | video->cap._DOS = 1; |
952c63e9 | 1014 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 1015 | video->cap._DOD = 1; |
952c63e9 | 1016 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 1017 | video->cap._ROM = 1; |
952c63e9 | 1018 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 1019 | video->cap._GPD = 1; |
952c63e9 | 1020 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 1021 | video->cap._SPD = 1; |
952c63e9 | 1022 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 1023 | video->cap._VPO = 1; |
1da177e4 LT |
1024 | } |
1025 | ||
1026 | /* | |
1027 | * Check whether the video bus device has required AML method to | |
1028 | * support the desired features | |
1029 | */ | |
1030 | ||
4be44fcd | 1031 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 1032 | { |
4be44fcd | 1033 | acpi_status status = -ENOENT; |
1e4cffe7 | 1034 | struct pci_dev *dev; |
1da177e4 LT |
1035 | |
1036 | if (!video) | |
d550d98d | 1037 | return -EINVAL; |
1da177e4 | 1038 | |
1e4cffe7 | 1039 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1040 | if (!dev) |
1041 | return -ENODEV; | |
1e4cffe7 | 1042 | pci_dev_put(dev); |
22c13f9d | 1043 | |
21fcb34e FC |
1044 | /* |
1045 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1046 | * to check well known required nodes. |
1047 | */ | |
1048 | ||
98fb8fe1 | 1049 | /* Does this device support video switching? */ |
3a1151e3 SB |
1050 | if (video->cap._DOS || video->cap._DOD) { |
1051 | if (!video->cap._DOS) { | |
1052 | printk(KERN_WARNING FW_BUG | |
1053 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1054 | acpi_device_bid(video->device)); | |
1055 | } | |
1da177e4 LT |
1056 | video->flags.multihead = 1; |
1057 | status = 0; | |
1058 | } | |
1059 | ||
98fb8fe1 | 1060 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1061 | if (video->cap._ROM) { |
1da177e4 LT |
1062 | video->flags.rom = 1; |
1063 | status = 0; | |
1064 | } | |
1065 | ||
98fb8fe1 | 1066 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1067 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1068 | video->flags.post = 1; |
1069 | status = 0; | |
1070 | } | |
1071 | ||
d550d98d | 1072 | return status; |
1da177e4 LT |
1073 | } |
1074 | ||
21fcb34e FC |
1075 | /* |
1076 | * -------------------------------------------------------------------------- | |
1077 | * Driver Interface | |
1078 | * -------------------------------------------------------------------------- | |
1079 | */ | |
1da177e4 LT |
1080 | |
1081 | /* device interface */ | |
915ea7e4 | 1082 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1083 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1084 | { | |
78eed028 DT |
1085 | struct acpi_video_enumerated_device *ids; |
1086 | int i; | |
1087 | ||
1088 | for (i = 0; i < video->attached_count; i++) { | |
1089 | ids = &video->attached_array[i]; | |
1090 | if ((ids->value.int_val & 0xffff) == device_id) | |
1091 | return &ids->value.attrib; | |
1092 | } | |
82cae999 | 1093 | |
82cae999 RZ |
1094 | return NULL; |
1095 | } | |
1da177e4 | 1096 | |
e92a7162 MG |
1097 | static int |
1098 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1099 | unsigned long device_id) | |
1100 | { | |
1101 | struct acpi_video_enumerated_device *ids; | |
1102 | int i; | |
1103 | ||
1104 | for (i = 0; i < video->attached_count; i++) { | |
1105 | ids = &video->attached_array[i]; | |
1106 | if ((ids->value.int_val & 0xffff) == device_id) | |
1107 | return ids->value.int_val; | |
1108 | } | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
1da177e4 | 1113 | static int |
4be44fcd LB |
1114 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1115 | struct acpi_video_bus *video) | |
1da177e4 | 1116 | { |
27663c58 | 1117 | unsigned long long device_id; |
e92a7162 | 1118 | int status, device_type; |
4be44fcd | 1119 | struct acpi_video_device *data; |
915ea7e4 | 1120 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1121 | |
4be44fcd LB |
1122 | status = |
1123 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1124 | /* Some device omits _ADR, we skip them instead of fail */ |
1125 | if (ACPI_FAILURE(status)) | |
1126 | return 0; | |
1da177e4 | 1127 | |
91e13aa3 AL |
1128 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1129 | if (!data) | |
1130 | return -ENOMEM; | |
82cae999 | 1131 | |
91e13aa3 AL |
1132 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1133 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1134 | device->driver_data = data; | |
1135 | ||
1136 | data->device_id = device_id; | |
1137 | data->video = video; | |
1138 | data->dev = device; | |
1139 | ||
1140 | attribute = acpi_video_get_device_attr(video, device_id); | |
1141 | ||
915ea7e4 | 1142 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1143 | switch (attribute->display_type) { |
1144 | case ACPI_VIDEO_DISPLAY_CRT: | |
1145 | data->flags.crt = 1; | |
1146 | break; | |
1147 | case ACPI_VIDEO_DISPLAY_TV: | |
1148 | data->flags.tvout = 1; | |
1149 | break; | |
1150 | case ACPI_VIDEO_DISPLAY_DVI: | |
1151 | data->flags.dvi = 1; | |
1152 | break; | |
1153 | case ACPI_VIDEO_DISPLAY_LCD: | |
1154 | data->flags.lcd = 1; | |
1155 | break; | |
1156 | default: | |
1157 | data->flags.unknown = 1; | |
1158 | break; | |
1159 | } | |
915ea7e4 | 1160 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1161 | data->flags.bios = 1; |
1162 | } else { | |
1163 | /* Check for legacy IDs */ | |
1164 | device_type = acpi_video_get_device_type(video, device_id); | |
1165 | /* Ignore bits 16 and 18-20 */ | |
1166 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1167 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1168 | data->flags.crt = 1; | |
1169 | break; | |
1170 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1171 | data->flags.lcd = 1; | |
1172 | break; | |
1173 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1174 | data->flags.tvout = 1; | |
1175 | break; | |
1176 | default: | |
1177 | data->flags.unknown = 1; | |
e92a7162 | 1178 | } |
91e13aa3 | 1179 | } |
4be44fcd | 1180 | |
91e13aa3 AL |
1181 | acpi_video_device_bind(video, data); |
1182 | acpi_video_device_find_cap(data); | |
1da177e4 | 1183 | |
91e13aa3 AL |
1184 | mutex_lock(&video->device_list_lock); |
1185 | list_add_tail(&data->entry, &video->video_device_list); | |
1186 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1187 | |
91e13aa3 | 1188 | return status; |
1da177e4 LT |
1189 | } |
1190 | ||
1191 | /* | |
1192 | * Arg: | |
21fcb34e | 1193 | * video : video bus device |
1da177e4 LT |
1194 | * |
1195 | * Return: | |
21fcb34e FC |
1196 | * none |
1197 | * | |
1198 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1199 | * bind the ids with the corresponding video devices |
1200 | * under the video bus. | |
4be44fcd | 1201 | */ |
1da177e4 | 1202 | |
4be44fcd | 1203 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1204 | { |
ff102ea9 DT |
1205 | struct acpi_video_device *dev; |
1206 | ||
bbac81f5 | 1207 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1208 | |
1209 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1210 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1211 | |
bbac81f5 | 1212 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1213 | } |
1214 | ||
1215 | /* | |
1216 | * Arg: | |
21fcb34e FC |
1217 | * video : video bus device |
1218 | * device : video output device under the video | |
1219 | * bus | |
1da177e4 LT |
1220 | * |
1221 | * Return: | |
21fcb34e FC |
1222 | * none |
1223 | * | |
1da177e4 LT |
1224 | * Bind the ids with the corresponding video devices |
1225 | * under the video bus. | |
4be44fcd | 1226 | */ |
1da177e4 LT |
1227 | |
1228 | static void | |
4be44fcd LB |
1229 | acpi_video_device_bind(struct acpi_video_bus *video, |
1230 | struct acpi_video_device *device) | |
1da177e4 | 1231 | { |
78eed028 | 1232 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1233 | int i; |
1da177e4 | 1234 | |
78eed028 DT |
1235 | for (i = 0; i < video->attached_count; i++) { |
1236 | ids = &video->attached_array[i]; | |
1237 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1238 | ids->bind_info = device; | |
1da177e4 LT |
1239 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1240 | } | |
1241 | } | |
1da177e4 LT |
1242 | } |
1243 | ||
1244 | /* | |
1245 | * Arg: | |
21fcb34e | 1246 | * video : video bus device |
1da177e4 LT |
1247 | * |
1248 | * Return: | |
21fcb34e FC |
1249 | * < 0 : error |
1250 | * | |
1da177e4 LT |
1251 | * Call _DOD to enumerate all devices attached to display adapter |
1252 | * | |
4be44fcd | 1253 | */ |
1da177e4 LT |
1254 | |
1255 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1256 | { | |
4be44fcd LB |
1257 | int status; |
1258 | int count; | |
1259 | int i; | |
78eed028 | 1260 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1261 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1262 | union acpi_object *dod = NULL; | |
1263 | union acpi_object *obj; | |
1da177e4 | 1264 | |
90130268 | 1265 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1266 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1267 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1268 | return status; |
1da177e4 LT |
1269 | } |
1270 | ||
50dd0969 | 1271 | dod = buffer.pointer; |
1da177e4 | 1272 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1273 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1274 | status = -EFAULT; |
1275 | goto out; | |
1276 | } | |
1277 | ||
1278 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1279 | dod->package.count)); |
1da177e4 | 1280 | |
78eed028 DT |
1281 | active_list = kcalloc(1 + dod->package.count, |
1282 | sizeof(struct acpi_video_enumerated_device), | |
1283 | GFP_KERNEL); | |
1284 | if (!active_list) { | |
1da177e4 LT |
1285 | status = -ENOMEM; |
1286 | goto out; | |
1287 | } | |
1288 | ||
1289 | count = 0; | |
1290 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1291 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1292 | |
1293 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1294 | printk(KERN_ERR PREFIX |
1295 | "Invalid _DOD data in element %d\n", i); | |
1296 | continue; | |
1da177e4 | 1297 | } |
78eed028 DT |
1298 | |
1299 | active_list[count].value.int_val = obj->integer.value; | |
1300 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1301 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1302 | (int)obj->integer.value)); | |
1da177e4 LT |
1303 | count++; |
1304 | } | |
1da177e4 | 1305 | |
6044ec88 | 1306 | kfree(video->attached_array); |
4be44fcd | 1307 | |
78eed028 | 1308 | video->attached_array = active_list; |
1da177e4 | 1309 | video->attached_count = count; |
78eed028 | 1310 | |
915ea7e4 | 1311 | out: |
02438d87 | 1312 | kfree(buffer.pointer); |
d550d98d | 1313 | return status; |
1da177e4 LT |
1314 | } |
1315 | ||
4be44fcd LB |
1316 | static int |
1317 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1318 | u32 level_current, u32 event) | |
1da177e4 | 1319 | { |
63f0edfc | 1320 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1321 | max = max_below = 0; |
1322 | min = min_above = 255; | |
63f0edfc | 1323 | /* Find closest level to level_current */ |
0a3db1ce | 1324 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1325 | l = device->brightness->levels[i]; |
1326 | if (abs(l - level_current) < abs(delta)) { | |
1327 | delta = l - level_current; | |
1328 | if (!delta) | |
1329 | break; | |
1330 | } | |
1331 | } | |
1332 | /* Ajust level_current to closest available level */ | |
1333 | level_current += delta; | |
0a3db1ce | 1334 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1335 | l = device->brightness->levels[i]; |
1336 | if (l < min) | |
1337 | min = l; | |
1338 | if (l > max) | |
1339 | max = l; | |
1340 | if (l < min_above && l > level_current) | |
1341 | min_above = l; | |
1342 | if (l > max_below && l < level_current) | |
1343 | max_below = l; | |
1344 | } | |
1345 | ||
1346 | switch (event) { | |
1347 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1348 | return (level_current < max) ? min_above : min; | |
1349 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1350 | return (level_current < max) ? min_above : max; | |
1351 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1352 | return (level_current > min) ? max_below : min; | |
1353 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1354 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1355 | return 0; | |
1356 | default: | |
1357 | return level_current; | |
1358 | } | |
1da177e4 LT |
1359 | } |
1360 | ||
c8890f90 | 1361 | static int |
4be44fcd | 1362 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1363 | { |
27663c58 | 1364 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1365 | int result = -EINVAL; |
1366 | ||
fbc9fe1b AL |
1367 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1368 | if (!acpi_video_verify_backlight_support()) | |
28c32e99 ZR |
1369 | return 0; |
1370 | ||
469778c1 | 1371 | if (!device->brightness) |
c8890f90 ZR |
1372 | goto out; |
1373 | ||
1374 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1375 | &level_current, |
1376 | false); | |
c8890f90 ZR |
1377 | if (result) |
1378 | goto out; | |
1379 | ||
1da177e4 | 1380 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1381 | |
24450c7a | 1382 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1383 | |
36342742 MG |
1384 | if (!result) |
1385 | backlight_force_update(device->backlight, | |
1386 | BACKLIGHT_UPDATE_HOTKEY); | |
1387 | ||
c8890f90 ZR |
1388 | out: |
1389 | if (result) | |
1390 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1391 | ||
1392 | return result; | |
1da177e4 LT |
1393 | } |
1394 | ||
e92a7162 MG |
1395 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1396 | void **edid) | |
1397 | { | |
1398 | struct acpi_video_bus *video; | |
1399 | struct acpi_video_device *video_device; | |
1400 | union acpi_object *buffer = NULL; | |
1401 | acpi_status status; | |
1402 | int i, length; | |
1403 | ||
1404 | if (!device || !acpi_driver_data(device)) | |
1405 | return -EINVAL; | |
1406 | ||
1407 | video = acpi_driver_data(device); | |
1408 | ||
1409 | for (i = 0; i < video->attached_count; i++) { | |
1410 | video_device = video->attached_array[i].bind_info; | |
1411 | length = 256; | |
1412 | ||
1413 | if (!video_device) | |
1414 | continue; | |
1415 | ||
82069552 ZR |
1416 | if (!video_device->cap._DDC) |
1417 | continue; | |
1418 | ||
e92a7162 MG |
1419 | if (type) { |
1420 | switch (type) { | |
1421 | case ACPI_VIDEO_DISPLAY_CRT: | |
1422 | if (!video_device->flags.crt) | |
1423 | continue; | |
1424 | break; | |
1425 | case ACPI_VIDEO_DISPLAY_TV: | |
1426 | if (!video_device->flags.tvout) | |
1427 | continue; | |
1428 | break; | |
1429 | case ACPI_VIDEO_DISPLAY_DVI: | |
1430 | if (!video_device->flags.dvi) | |
1431 | continue; | |
1432 | break; | |
1433 | case ACPI_VIDEO_DISPLAY_LCD: | |
1434 | if (!video_device->flags.lcd) | |
1435 | continue; | |
1436 | break; | |
1437 | } | |
1438 | } else if (video_device->device_id != device_id) { | |
1439 | continue; | |
1440 | } | |
1441 | ||
1442 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1443 | ||
1444 | if (ACPI_FAILURE(status) || !buffer || | |
1445 | buffer->type != ACPI_TYPE_BUFFER) { | |
1446 | length = 128; | |
1447 | status = acpi_video_device_EDID(video_device, &buffer, | |
1448 | length); | |
1449 | if (ACPI_FAILURE(status) || !buffer || | |
1450 | buffer->type != ACPI_TYPE_BUFFER) { | |
1451 | continue; | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | *edid = buffer->buffer.pointer; | |
1456 | return length; | |
1457 | } | |
1458 | ||
1459 | return -ENODEV; | |
1460 | } | |
1461 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1462 | ||
1da177e4 | 1463 | static int |
4be44fcd LB |
1464 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1465 | struct acpi_device *device) | |
1da177e4 | 1466 | { |
fba4e087 | 1467 | int status = 0; |
ff102ea9 | 1468 | struct acpi_device *dev; |
1da177e4 | 1469 | |
fba4e087 IM |
1470 | /* |
1471 | * There are systems where video module known to work fine regardless | |
1472 | * of broken _DOD and ignoring returned value here doesn't cause | |
1473 | * any issues later. | |
1474 | */ | |
1475 | acpi_video_device_enumerate(video); | |
1da177e4 | 1476 | |
ff102ea9 | 1477 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1478 | |
1479 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1480 | if (status) { |
91e13aa3 AL |
1481 | dev_err(&dev->dev, "Can't attach device\n"); |
1482 | break; | |
1da177e4 | 1483 | } |
1da177e4 | 1484 | } |
d550d98d | 1485 | return status; |
1da177e4 LT |
1486 | } |
1487 | ||
1da177e4 LT |
1488 | /* acpi_video interface */ |
1489 | ||
efaa14c7 AL |
1490 | /* |
1491 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1492 | * preform any automatic brightness change on receiving a notification. | |
1493 | */ | |
4be44fcd | 1494 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1495 | { |
efaa14c7 | 1496 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1497 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1498 | } |
1499 | ||
4be44fcd | 1500 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1501 | { |
efaa14c7 | 1502 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1503 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1504 | } |
1505 | ||
7015558f | 1506 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1507 | { |
7015558f | 1508 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1509 | struct input_dev *input; |
17c452f9 | 1510 | int keycode = 0; |
e9dab196 | 1511 | |
67b662e1 | 1512 | if (!video || !video->input) |
d550d98d | 1513 | return; |
1da177e4 | 1514 | |
e9dab196 | 1515 | input = video->input; |
1da177e4 LT |
1516 | |
1517 | switch (event) { | |
98fb8fe1 | 1518 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1519 | * most likely via hotkey. */ |
8a37c65d | 1520 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1521 | break; |
1522 | ||
98fb8fe1 | 1523 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1524 | * connector. */ |
1525 | acpi_video_device_enumerate(video); | |
1526 | acpi_video_device_rebind(video); | |
e9dab196 | 1527 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1528 | break; |
1529 | ||
4be44fcd | 1530 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1531 | keycode = KEY_SWITCHVIDEOMODE; |
1532 | break; | |
4be44fcd | 1533 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1534 | keycode = KEY_VIDEO_NEXT; |
1535 | break; | |
4be44fcd | 1536 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1537 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1538 | break; |
1539 | ||
1540 | default: | |
1541 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1542 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1543 | break; |
1544 | } | |
1545 | ||
8a37c65d LT |
1546 | if (acpi_notifier_call_chain(device, event, 0)) |
1547 | /* Something vetoed the keypress. */ | |
1548 | keycode = 0; | |
17c452f9 MG |
1549 | |
1550 | if (keycode) { | |
1551 | input_report_key(input, keycode, 1); | |
1552 | input_sync(input); | |
1553 | input_report_key(input, keycode, 0); | |
1554 | input_sync(input); | |
1555 | } | |
e9dab196 | 1556 | |
d550d98d | 1557 | return; |
1da177e4 LT |
1558 | } |
1559 | ||
4be44fcd | 1560 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1561 | { |
50dd0969 | 1562 | struct acpi_video_device *video_device = data; |
4be44fcd | 1563 | struct acpi_device *device = NULL; |
e9dab196 LY |
1564 | struct acpi_video_bus *bus; |
1565 | struct input_dev *input; | |
17c452f9 | 1566 | int keycode = 0; |
1da177e4 | 1567 | |
1da177e4 | 1568 | if (!video_device) |
d550d98d | 1569 | return; |
1da177e4 | 1570 | |
e6afa0de | 1571 | device = video_device->dev; |
e9dab196 LY |
1572 | bus = video_device->video; |
1573 | input = bus->input; | |
1da177e4 LT |
1574 | |
1575 | switch (event) { | |
4be44fcd | 1576 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1577 | if (brightness_switch_enabled) |
1578 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1579 | keycode = KEY_BRIGHTNESS_CYCLE; |
1580 | break; | |
4be44fcd | 1581 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1582 | if (brightness_switch_enabled) |
1583 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1584 | keycode = KEY_BRIGHTNESSUP; |
1585 | break; | |
4be44fcd | 1586 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1587 | if (brightness_switch_enabled) |
1588 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1589 | keycode = KEY_BRIGHTNESSDOWN; |
1590 | break; | |
70f23fd6 | 1591 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1592 | if (brightness_switch_enabled) |
1593 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1594 | keycode = KEY_BRIGHTNESS_ZERO; |
1595 | break; | |
4be44fcd | 1596 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1597 | if (brightness_switch_enabled) |
1598 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 | 1599 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1600 | break; |
1601 | default: | |
1602 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1603 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1604 | break; |
1605 | } | |
e9dab196 | 1606 | |
7761f638 | 1607 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1608 | |
1609 | if (keycode) { | |
1610 | input_report_key(input, keycode, 1); | |
1611 | input_sync(input); | |
1612 | input_report_key(input, keycode, 0); | |
1613 | input_sync(input); | |
1614 | } | |
e9dab196 | 1615 | |
d550d98d | 1616 | return; |
1da177e4 LT |
1617 | } |
1618 | ||
ac7729da RW |
1619 | static int acpi_video_resume(struct notifier_block *nb, |
1620 | unsigned long val, void *ign) | |
863c1490 MG |
1621 | { |
1622 | struct acpi_video_bus *video; | |
1623 | struct acpi_video_device *video_device; | |
1624 | int i; | |
1625 | ||
ac7729da RW |
1626 | switch (val) { |
1627 | case PM_HIBERNATION_PREPARE: | |
1628 | case PM_SUSPEND_PREPARE: | |
1629 | case PM_RESTORE_PREPARE: | |
1630 | return NOTIFY_DONE; | |
1631 | } | |
863c1490 | 1632 | |
ac7729da RW |
1633 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1634 | ||
1635 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1636 | |
1637 | for (i = 0; i < video->attached_count; i++) { | |
1638 | video_device = video->attached_array[i].bind_info; | |
1639 | if (video_device && video_device->backlight) | |
1640 | acpi_video_set_brightness(video_device->backlight); | |
1641 | } | |
ac7729da RW |
1642 | |
1643 | return NOTIFY_OK; | |
863c1490 MG |
1644 | } |
1645 | ||
c504f8cb ZR |
1646 | static acpi_status |
1647 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1648 | void **return_value) | |
1649 | { | |
1650 | struct acpi_device *device = context; | |
1651 | struct acpi_device *sibling; | |
1652 | int result; | |
1653 | ||
1654 | if (handle == device->handle) | |
1655 | return AE_CTRL_TERMINATE; | |
1656 | ||
1657 | result = acpi_bus_get_device(handle, &sibling); | |
1658 | if (result) | |
1659 | return AE_OK; | |
1660 | ||
1661 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1662 | return AE_ALREADY_EXISTS; | |
1663 | ||
1664 | return AE_OK; | |
1665 | } | |
1666 | ||
67b662e1 AL |
1667 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1668 | { | |
fbc9fe1b | 1669 | if (acpi_video_verify_backlight_support()) { |
67b662e1 AL |
1670 | struct backlight_properties props; |
1671 | struct pci_dev *pdev; | |
1672 | acpi_handle acpi_parent; | |
1673 | struct device *parent = NULL; | |
1674 | int result; | |
1675 | static int count; | |
1676 | char *name; | |
1677 | ||
1678 | result = acpi_video_init_brightness(device); | |
1679 | if (result) | |
1680 | return; | |
1681 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1682 | if (!name) | |
1683 | return; | |
1684 | count++; | |
1685 | ||
1686 | acpi_get_parent(device->dev->handle, &acpi_parent); | |
1687 | ||
1688 | pdev = acpi_get_pci_dev(acpi_parent); | |
1689 | if (pdev) { | |
1690 | parent = &pdev->dev; | |
1691 | pci_dev_put(pdev); | |
1692 | } | |
1693 | ||
1694 | memset(&props, 0, sizeof(struct backlight_properties)); | |
1695 | props.type = BACKLIGHT_FIRMWARE; | |
1696 | props.max_brightness = device->brightness->count - 3; | |
1697 | device->backlight = backlight_device_register(name, | |
1698 | parent, | |
1699 | device, | |
1700 | &acpi_backlight_ops, | |
1701 | &props); | |
1702 | kfree(name); | |
1703 | if (IS_ERR(device->backlight)) | |
1704 | return; | |
1705 | ||
1706 | /* | |
1707 | * Save current brightness level in case we have to restore it | |
1708 | * before acpi_video_device_lcd_set_level() is called next time. | |
1709 | */ | |
1710 | device->backlight->props.brightness = | |
1711 | acpi_video_get_brightness(device->backlight); | |
1712 | ||
1713 | device->cooling_dev = thermal_cooling_device_register("LCD", | |
1714 | device->dev, &video_cooling_ops); | |
1715 | if (IS_ERR(device->cooling_dev)) { | |
1716 | /* | |
1717 | * Set cooling_dev to NULL so we don't crash trying to | |
1718 | * free it. | |
1719 | * Also, why the hell we are returning early and | |
1720 | * not attempt to register video output if cooling | |
1721 | * device registration failed? | |
1722 | * -- dtor | |
1723 | */ | |
1724 | device->cooling_dev = NULL; | |
1725 | return; | |
1726 | } | |
1727 | ||
1728 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1729 | device->cooling_dev->id); | |
1730 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1731 | &device->cooling_dev->device.kobj, | |
1732 | "thermal_cooling"); | |
1733 | if (result) | |
1734 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1735 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1736 | &device->dev->dev.kobj, "device"); | |
1737 | if (result) | |
1738 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) | |
1743 | { | |
1744 | struct acpi_video_device *dev; | |
1745 | ||
1746 | mutex_lock(&video->device_list_lock); | |
1747 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1748 | acpi_video_dev_register_backlight(dev); | |
1749 | mutex_unlock(&video->device_list_lock); | |
1750 | ||
1751 | video->pm_nb.notifier_call = acpi_video_resume; | |
1752 | video->pm_nb.priority = 0; | |
1753 | return register_pm_notifier(&video->pm_nb); | |
1754 | } | |
1755 | ||
1756 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1757 | { | |
1758 | if (device->backlight) { | |
1759 | backlight_device_unregister(device->backlight); | |
1760 | device->backlight = NULL; | |
1761 | } | |
1762 | if (device->brightness) { | |
1763 | kfree(device->brightness->levels); | |
1764 | kfree(device->brightness); | |
1765 | device->brightness = NULL; | |
1766 | } | |
1767 | if (device->cooling_dev) { | |
1768 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1769 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1770 | thermal_cooling_device_unregister(device->cooling_dev); | |
1771 | device->cooling_dev = NULL; | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1776 | { | |
1777 | struct acpi_video_device *dev; | |
1778 | int error = unregister_pm_notifier(&video->pm_nb); | |
1779 | ||
1780 | mutex_lock(&video->device_list_lock); | |
1781 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1782 | acpi_video_dev_unregister_backlight(dev); | |
1783 | mutex_unlock(&video->device_list_lock); | |
1784 | ||
1785 | return error; | |
1786 | } | |
1787 | ||
1788 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1789 | { | |
1790 | acpi_status status; | |
1791 | struct acpi_device *adev = device->dev; | |
1792 | ||
1793 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1794 | acpi_video_device_notify, device); | |
1795 | if (ACPI_FAILURE(status)) | |
1796 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1797 | else | |
1798 | device->flags.notify = 1; | |
1799 | } | |
1800 | ||
1801 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1802 | { | |
1803 | struct input_dev *input; | |
1804 | struct acpi_video_device *dev; | |
1805 | int error; | |
1806 | ||
1807 | video->input = input = input_allocate_device(); | |
1808 | if (!input) { | |
1809 | error = -ENOMEM; | |
1810 | goto out; | |
1811 | } | |
1812 | ||
1813 | error = acpi_video_bus_start_devices(video); | |
1814 | if (error) | |
1815 | goto err_free_input; | |
1816 | ||
1817 | snprintf(video->phys, sizeof(video->phys), | |
1818 | "%s/video/input0", acpi_device_hid(video->device)); | |
1819 | ||
1820 | input->name = acpi_device_name(video->device); | |
1821 | input->phys = video->phys; | |
1822 | input->id.bustype = BUS_HOST; | |
1823 | input->id.product = 0x06; | |
1824 | input->dev.parent = &video->device->dev; | |
1825 | input->evbit[0] = BIT(EV_KEY); | |
1826 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1827 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1828 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1829 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1830 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1831 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1832 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1833 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1834 | ||
1835 | error = input_register_device(input); | |
1836 | if (error) | |
1837 | goto err_stop_dev; | |
1838 | ||
1839 | mutex_lock(&video->device_list_lock); | |
1840 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1841 | acpi_video_dev_add_notify_handler(dev); | |
1842 | mutex_unlock(&video->device_list_lock); | |
1843 | ||
1844 | return 0; | |
1845 | ||
1846 | err_stop_dev: | |
1847 | acpi_video_bus_stop_devices(video); | |
1848 | err_free_input: | |
1849 | input_free_device(input); | |
1850 | video->input = NULL; | |
1851 | out: | |
1852 | return error; | |
1853 | } | |
1854 | ||
1855 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1856 | { | |
1857 | if (dev->flags.notify) { | |
1858 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1859 | acpi_video_device_notify); | |
1860 | dev->flags.notify = 0; | |
1861 | } | |
1862 | } | |
1863 | ||
1864 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1865 | { | |
1866 | struct acpi_video_device *dev; | |
1867 | ||
1868 | mutex_lock(&video->device_list_lock); | |
1869 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1870 | acpi_video_dev_remove_notify_handler(dev); | |
1871 | mutex_unlock(&video->device_list_lock); | |
1872 | ||
1873 | acpi_video_bus_stop_devices(video); | |
1874 | input_unregister_device(video->input); | |
1875 | video->input = NULL; | |
1876 | } | |
1877 | ||
1878 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1879 | { | |
1880 | struct acpi_video_device *dev, *next; | |
1881 | ||
1882 | mutex_lock(&video->device_list_lock); | |
1883 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1884 | list_del(&dev->entry); | |
1885 | kfree(dev); | |
1886 | } | |
1887 | mutex_unlock(&video->device_list_lock); | |
1888 | ||
1889 | return 0; | |
1890 | } | |
1891 | ||
ac7729da RW |
1892 | static int instance; |
1893 | ||
4be44fcd | 1894 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1895 | { |
f51e8391 | 1896 | struct acpi_video_bus *video; |
f51e8391 | 1897 | int error; |
c504f8cb ZR |
1898 | acpi_status status; |
1899 | ||
1900 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1901 | device->parent->handle, 1, | |
1902 | acpi_video_bus_match, NULL, | |
1903 | device, NULL); | |
1904 | if (status == AE_ALREADY_EXISTS) { | |
1905 | printk(KERN_WARNING FW_BUG | |
1906 | "Duplicate ACPI video bus devices for the" | |
1907 | " same VGA controller, please try module " | |
1908 | "parameter \"video.allow_duplicates=1\"" | |
1909 | "if the current driver doesn't work.\n"); | |
1910 | if (!allow_duplicates) | |
1911 | return -ENODEV; | |
1912 | } | |
1da177e4 | 1913 | |
36bcbec7 | 1914 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1915 | if (!video) |
d550d98d | 1916 | return -ENOMEM; |
1da177e4 | 1917 | |
e6d9da1d ZR |
1918 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1919 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1920 | if (instance) | |
1921 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1922 | instance++; |
e6d9da1d | 1923 | } |
f3b39f13 ZY |
1924 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1925 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1926 | if (instance) | |
1927 | device->pnp.bus_id[3] = '0' + instance; | |
1928 | instance++; | |
1929 | } | |
e6d9da1d | 1930 | |
e6afa0de | 1931 | video->device = device; |
1da177e4 LT |
1932 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1933 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1934 | device->driver_data = video; |
1da177e4 LT |
1935 | |
1936 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1937 | error = acpi_video_bus_check(video); |
1938 | if (error) | |
1939 | goto err_free_video; | |
1da177e4 | 1940 | |
bbac81f5 | 1941 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1942 | INIT_LIST_HEAD(&video->video_device_list); |
1943 | ||
ea9f8856 IM |
1944 | error = acpi_video_bus_get_devices(video, device); |
1945 | if (error) | |
91e13aa3 | 1946 | goto err_put_video; |
1da177e4 | 1947 | |
1da177e4 | 1948 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1949 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1950 | video->flags.multihead ? "yes" : "no", | |
1951 | video->flags.rom ? "yes" : "no", | |
1952 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1953 | mutex_lock(&video_list_lock); |
1954 | list_add_tail(&video->entry, &video_bus_head); | |
1955 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1956 | |
67b662e1 AL |
1957 | acpi_video_bus_register_backlight(video); |
1958 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1959 | |
f51e8391 DT |
1960 | return 0; |
1961 | ||
67b662e1 | 1962 | err_put_video: |
f51e8391 DT |
1963 | acpi_video_bus_put_devices(video); |
1964 | kfree(video->attached_array); | |
67b662e1 | 1965 | err_free_video: |
f51e8391 | 1966 | kfree(video); |
db89b4f0 | 1967 | device->driver_data = NULL; |
1da177e4 | 1968 | |
f51e8391 | 1969 | return error; |
1da177e4 LT |
1970 | } |
1971 | ||
51fac838 | 1972 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1973 | { |
4be44fcd | 1974 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1975 | |
1da177e4 LT |
1976 | |
1977 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1978 | return -EINVAL; |
1da177e4 | 1979 | |
50dd0969 | 1980 | video = acpi_driver_data(device); |
1da177e4 | 1981 | |
67b662e1 AL |
1982 | acpi_video_bus_remove_notify_handler(video); |
1983 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1984 | acpi_video_bus_put_devices(video); |
1da177e4 | 1985 | |
67b662e1 AL |
1986 | mutex_lock(&video_list_lock); |
1987 | list_del(&video->entry); | |
1988 | mutex_unlock(&video_list_lock); | |
1989 | ||
6044ec88 | 1990 | kfree(video->attached_array); |
1da177e4 LT |
1991 | kfree(video); |
1992 | ||
d550d98d | 1993 | return 0; |
1da177e4 LT |
1994 | } |
1995 | ||
c6996bdd AC |
1996 | static int __init is_i740(struct pci_dev *dev) |
1997 | { | |
1998 | if (dev->device == 0x00D1) | |
1999 | return 1; | |
2000 | if (dev->device == 0x7000) | |
2001 | return 1; | |
2002 | return 0; | |
2003 | } | |
2004 | ||
74a365b3 MG |
2005 | static int __init intel_opregion_present(void) |
2006 | { | |
c6996bdd | 2007 | int opregion = 0; |
74a365b3 MG |
2008 | struct pci_dev *dev = NULL; |
2009 | u32 address; | |
2010 | ||
2011 | for_each_pci_dev(dev) { | |
2012 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
2013 | continue; | |
2014 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
2015 | continue; | |
c6996bdd AC |
2016 | /* We don't want to poke around undefined i740 registers */ |
2017 | if (is_i740(dev)) | |
2018 | continue; | |
74a365b3 MG |
2019 | pci_read_config_dword(dev, 0xfc, &address); |
2020 | if (!address) | |
2021 | continue; | |
c6996bdd | 2022 | opregion = 1; |
74a365b3 | 2023 | } |
c6996bdd | 2024 | return opregion; |
74a365b3 MG |
2025 | } |
2026 | ||
8e5c2b77 | 2027 | int acpi_video_register(void) |
1da177e4 | 2028 | { |
8e5c2b77 | 2029 | int result = 0; |
86e437f0 ZY |
2030 | if (register_count) { |
2031 | /* | |
8e5c2b77 RW |
2032 | * if the function of acpi_video_register is already called, |
2033 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
2034 | */ |
2035 | return 0; | |
2036 | } | |
1da177e4 | 2037 | |
67b662e1 AL |
2038 | mutex_init(&video_list_lock); |
2039 | INIT_LIST_HEAD(&video_bus_head); | |
2040 | ||
1da177e4 | 2041 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 2042 | if (result < 0) |
d550d98d | 2043 | return -ENODEV; |
1da177e4 | 2044 | |
86e437f0 ZY |
2045 | /* |
2046 | * When the acpi_video_bus is loaded successfully, increase | |
2047 | * the counter reference. | |
2048 | */ | |
2049 | register_count = 1; | |
2050 | ||
d550d98d | 2051 | return 0; |
1da177e4 | 2052 | } |
8e5c2b77 | 2053 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 2054 | |
86e437f0 ZY |
2055 | void acpi_video_unregister(void) |
2056 | { | |
2057 | if (!register_count) { | |
2058 | /* | |
2059 | * If the acpi video bus is already unloaded, don't | |
2060 | * unload it again and return directly. | |
2061 | */ | |
2062 | return; | |
2063 | } | |
2064 | acpi_bus_unregister_driver(&acpi_video_bus); | |
2065 | ||
86e437f0 ZY |
2066 | register_count = 0; |
2067 | ||
2068 | return; | |
2069 | } | |
2070 | EXPORT_SYMBOL(acpi_video_unregister); | |
2071 | ||
74a365b3 MG |
2072 | /* |
2073 | * This is kind of nasty. Hardware using Intel chipsets may require | |
2074 | * the video opregion code to be run first in order to initialise | |
2075 | * state before any ACPI video calls are made. To handle this we defer | |
2076 | * registration of the video class until the opregion code has run. | |
2077 | */ | |
2078 | ||
2079 | static int __init acpi_video_init(void) | |
2080 | { | |
45cb50e6 ZR |
2081 | dmi_check_system(video_dmi_table); |
2082 | ||
74a365b3 MG |
2083 | if (intel_opregion_present()) |
2084 | return 0; | |
2085 | ||
2086 | return acpi_video_register(); | |
2087 | } | |
1da177e4 | 2088 | |
86e437f0 | 2089 | static void __exit acpi_video_exit(void) |
1da177e4 | 2090 | { |
86e437f0 | 2091 | acpi_video_unregister(); |
1da177e4 | 2092 | |
d550d98d | 2093 | return; |
1da177e4 LT |
2094 | } |
2095 | ||
2096 | module_init(acpi_video_init); | |
2097 | module_exit(acpi_video_exit); |