]>
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> |
1da177e4 | 40 | #include <asm/uaccess.h> |
eb27cae8 | 41 | #include <linux/dmi.h> |
1da177e4 LT |
42 | #include <acpi/acpi_bus.h> |
43 | #include <acpi/acpi_drivers.h> | |
ac7729da | 44 | #include <linux/suspend.h> |
e92a7162 | 45 | #include <acpi/video.h> |
1da177e4 | 46 | |
8c5bd7ad RW |
47 | #include "internal.h" |
48 | ||
a192a958 LB |
49 | #define PREFIX "ACPI: " |
50 | ||
1da177e4 LT |
51 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
52 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
53 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
54 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
55 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
56 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
57 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
58 | ||
f4715189 TT |
59 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
60 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
61 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
62 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
63 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 64 | |
2f3d000a | 65 | #define MAX_NAME_LEN 20 |
1da177e4 | 66 | |
1da177e4 | 67 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 68 | ACPI_MODULE_NAME("video"); |
1da177e4 | 69 | |
f52fd66d | 70 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 71 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
72 | MODULE_LICENSE("GPL"); |
73 | ||
90ab5ee9 | 74 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
75 | module_param(brightness_switch_enabled, bool, 0644); |
76 | ||
c504f8cb ZR |
77 | /* |
78 | * By default, we don't allow duplicate ACPI video bus devices | |
79 | * under the same VGA controller | |
80 | */ | |
90ab5ee9 | 81 | static bool allow_duplicates; |
c504f8cb ZR |
82 | module_param(allow_duplicates, bool, 0644); |
83 | ||
fbc9fe1b AL |
84 | /* |
85 | * For Windows 8 systems: if set ture and the GPU driver has | |
86 | * registered a backlight interface, skip registering ACPI video's. | |
87 | */ | |
88 | static bool use_native_backlight = false; | |
89 | module_param(use_native_backlight, bool, 0644); | |
90 | ||
915ea7e4 | 91 | static int register_count; |
67b662e1 AL |
92 | static struct mutex video_list_lock; |
93 | static struct list_head video_bus_head; | |
4be44fcd | 94 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 95 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 96 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 97 | |
1ba90e3a TR |
98 | static const struct acpi_device_id video_device_ids[] = { |
99 | {ACPI_VIDEO_HID, 0}, | |
100 | {"", 0}, | |
101 | }; | |
102 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
103 | ||
1da177e4 | 104 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 105 | .name = "video", |
1da177e4 | 106 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 107 | .ids = video_device_ids, |
1da177e4 LT |
108 | .ops = { |
109 | .add = acpi_video_bus_add, | |
110 | .remove = acpi_video_bus_remove, | |
7015558f | 111 | .notify = acpi_video_bus_notify, |
4be44fcd | 112 | }, |
1da177e4 LT |
113 | }; |
114 | ||
115 | struct acpi_video_bus_flags { | |
4be44fcd LB |
116 | u8 multihead:1; /* can switch video heads */ |
117 | u8 rom:1; /* can retrieve a video rom */ | |
118 | u8 post:1; /* can configure the head to */ | |
119 | u8 reserved:5; | |
1da177e4 LT |
120 | }; |
121 | ||
122 | struct acpi_video_bus_cap { | |
21fcb34e FC |
123 | u8 _DOS:1; /* Enable/Disable output switching */ |
124 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
125 | u8 _ROM:1; /* Get ROM Data */ | |
126 | u8 _GPD:1; /* Get POST Device */ | |
127 | u8 _SPD:1; /* Set POST Device */ | |
128 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 129 | u8 reserved:2; |
1da177e4 LT |
130 | }; |
131 | ||
4be44fcd LB |
132 | struct acpi_video_device_attrib { |
133 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
134 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
135 | u32 display_type:4; /* Describe the specific type in use */ | |
136 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
137 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
138 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 139 | the VGA device. */ |
21fcb34e FC |
140 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
141 | u32 reserved:10; /* Must be 0 */ | |
142 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
143 | }; |
144 | ||
145 | struct acpi_video_enumerated_device { | |
146 | union { | |
147 | u32 int_val; | |
4be44fcd | 148 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
149 | } value; |
150 | struct acpi_video_device *bind_info; | |
151 | }; | |
152 | ||
153 | struct acpi_video_bus { | |
e6afa0de | 154 | struct acpi_device *device; |
4be44fcd | 155 | u8 dos_setting; |
1da177e4 | 156 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
157 | u8 attached_count; |
158 | struct acpi_video_bus_cap cap; | |
1da177e4 | 159 | struct acpi_video_bus_flags flags; |
4be44fcd | 160 | struct list_head video_device_list; |
bbac81f5 | 161 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 162 | struct list_head entry; |
e9dab196 LY |
163 | struct input_dev *input; |
164 | char phys[32]; /* for input device */ | |
ac7729da | 165 | struct notifier_block pm_nb; |
1da177e4 LT |
166 | }; |
167 | ||
168 | struct acpi_video_device_flags { | |
4be44fcd LB |
169 | u8 crt:1; |
170 | u8 lcd:1; | |
171 | u8 tvout:1; | |
82cae999 | 172 | u8 dvi:1; |
4be44fcd LB |
173 | u8 bios:1; |
174 | u8 unknown:1; | |
91e13aa3 AL |
175 | u8 notify:1; |
176 | u8 reserved:1; | |
1da177e4 LT |
177 | }; |
178 | ||
179 | struct acpi_video_device_cap { | |
21fcb34e FC |
180 | u8 _ADR:1; /* Return the unique ID */ |
181 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
182 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 183 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 184 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 185 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
186 | }; |
187 | ||
d32f6947 ZR |
188 | struct acpi_video_brightness_flags { |
189 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 190 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 191 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
192 | }; |
193 | ||
1da177e4 | 194 | struct acpi_video_device_brightness { |
4be44fcd LB |
195 | int curr; |
196 | int count; | |
197 | int *levels; | |
d32f6947 | 198 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
199 | }; |
200 | ||
201 | struct acpi_video_device { | |
4be44fcd LB |
202 | unsigned long device_id; |
203 | struct acpi_video_device_flags flags; | |
204 | struct acpi_video_device_cap cap; | |
205 | struct list_head entry; | |
206 | struct acpi_video_bus *video; | |
207 | struct acpi_device *dev; | |
1da177e4 | 208 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 209 | struct backlight_device *backlight; |
4a703a8f | 210 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
211 | }; |
212 | ||
b7171ae7 | 213 | static const char device_decode[][30] = { |
1da177e4 LT |
214 | "motherboard VGA device", |
215 | "PCI VGA device", | |
216 | "AGP VGA device", | |
217 | "UNKNOWN", | |
218 | }; | |
219 | ||
4be44fcd LB |
220 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
221 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
222 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
223 | struct acpi_video_device *device); | |
1da177e4 | 224 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
225 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
226 | int level); | |
227 | static int acpi_video_device_lcd_get_level_current( | |
228 | struct acpi_video_device *device, | |
a89803df | 229 | unsigned long long *level, bool raw); |
4be44fcd LB |
230 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
231 | u32 level_current, u32 event); | |
c8890f90 | 232 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 233 | int event); |
1da177e4 | 234 | |
fbc9fe1b AL |
235 | static bool acpi_video_verify_backlight_support(void) |
236 | { | |
237 | if (acpi_osi_is_win8() && use_native_backlight && | |
238 | backlight_device_registered(BACKLIGHT_RAW)) | |
239 | return false; | |
240 | return acpi_video_backlight_support(); | |
241 | } | |
242 | ||
21fcb34e | 243 | /* backlight device sysfs support */ |
2f3d000a YL |
244 | static int acpi_video_get_brightness(struct backlight_device *bd) |
245 | { | |
27663c58 | 246 | unsigned long long cur_level; |
38531e6f | 247 | int i; |
7c364e79 | 248 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 249 | |
a89803df | 250 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 251 | return -EINVAL; |
38531e6f MG |
252 | for (i = 2; i < vd->brightness->count; i++) { |
253 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
254 | /* |
255 | * The first two entries are special - see page 575 | |
256 | * of the ACPI spec 3.0 | |
257 | */ | |
915ea7e4 | 258 | return i - 2; |
38531e6f MG |
259 | } |
260 | return 0; | |
2f3d000a YL |
261 | } |
262 | ||
263 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
264 | { | |
24450c7a | 265 | int request_level = bd->props.brightness + 2; |
7c364e79 | 266 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a ZR |
267 | |
268 | return acpi_video_device_lcd_set_level(vd, | |
269 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
270 | } |
271 | ||
acc2472e | 272 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
273 | .get_brightness = acpi_video_get_brightness, |
274 | .update_status = acpi_video_set_brightness, | |
275 | }; | |
276 | ||
702ed512 | 277 | /* thermal cooling device callbacks */ |
4a703a8f | 278 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 279 | long *state) |
702ed512 | 280 | { |
4a703a8f | 281 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
282 | struct acpi_video_device *video = acpi_driver_data(device); |
283 | ||
6503e5df MG |
284 | *state = video->brightness->count - 3; |
285 | return 0; | |
702ed512 ZR |
286 | } |
287 | ||
4a703a8f | 288 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 289 | long *state) |
702ed512 | 290 | { |
4a703a8f | 291 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 292 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 293 | unsigned long long level; |
6503e5df | 294 | int offset; |
702ed512 | 295 | |
a89803df | 296 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 297 | return -EINVAL; |
6503e5df MG |
298 | for (offset = 2; offset < video->brightness->count; offset++) |
299 | if (level == video->brightness->levels[offset]) { | |
300 | *state = video->brightness->count - offset - 1; | |
301 | return 0; | |
302 | } | |
702ed512 ZR |
303 | |
304 | return -EINVAL; | |
305 | } | |
306 | ||
307 | static int | |
4a703a8f | 308 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 309 | { |
4a703a8f | 310 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
311 | struct acpi_video_device *video = acpi_driver_data(device); |
312 | int level; | |
313 | ||
915ea7e4 | 314 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
315 | return -EINVAL; |
316 | ||
317 | state = video->brightness->count - state; | |
915ea7e4 | 318 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
319 | return acpi_video_device_lcd_set_level(video, level); |
320 | } | |
321 | ||
9c8b04be | 322 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
323 | .get_max_state = video_get_max_state, |
324 | .get_cur_state = video_get_cur_state, | |
325 | .set_cur_state = video_set_cur_state, | |
326 | }; | |
327 | ||
21fcb34e FC |
328 | /* |
329 | * -------------------------------------------------------------------------- | |
330 | * Video Management | |
331 | * -------------------------------------------------------------------------- | |
332 | */ | |
1da177e4 | 333 | |
1da177e4 | 334 | static int |
4be44fcd LB |
335 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
336 | union acpi_object **levels) | |
1da177e4 | 337 | { |
4be44fcd LB |
338 | int status; |
339 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
340 | union acpi_object *obj; | |
1da177e4 | 341 | |
1da177e4 LT |
342 | |
343 | *levels = NULL; | |
344 | ||
90130268 | 345 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 346 | if (!ACPI_SUCCESS(status)) |
d550d98d | 347 | return status; |
4be44fcd | 348 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 349 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 350 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
351 | status = -EFAULT; |
352 | goto err; | |
353 | } | |
354 | ||
355 | *levels = obj; | |
356 | ||
d550d98d | 357 | return 0; |
1da177e4 | 358 | |
915ea7e4 | 359 | err: |
6044ec88 | 360 | kfree(buffer.pointer); |
1da177e4 | 361 | |
d550d98d | 362 | return status; |
1da177e4 LT |
363 | } |
364 | ||
365 | static int | |
4be44fcd | 366 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 367 | { |
24450c7a | 368 | int status; |
9e6dada9 | 369 | int state; |
1da177e4 | 370 | |
0db98202 JL |
371 | status = acpi_execute_simple_method(device->dev->handle, |
372 | "_BCM", level); | |
24450c7a ZR |
373 | if (ACPI_FAILURE(status)) { |
374 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
375 | return -EIO; | |
376 | } | |
377 | ||
4500ca8e | 378 | device->brightness->curr = level; |
9e6dada9 | 379 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 380 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
381 | if (device->backlight) |
382 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
383 | return 0; |
384 | } | |
9e6dada9 | 385 | |
24450c7a ZR |
386 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
387 | return -EINVAL; | |
1da177e4 LT |
388 | } |
389 | ||
45cb50e6 ZR |
390 | /* |
391 | * For some buggy _BQC methods, we need to add a constant value to | |
392 | * the _BQC return value to get the actual current brightness level | |
393 | */ | |
394 | ||
395 | static int bqc_offset_aml_bug_workaround; | |
396 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
397 | { | |
398 | bqc_offset_aml_bug_workaround = 9; | |
399 | return 0; | |
400 | } | |
401 | ||
402 | static struct dmi_system_id video_dmi_table[] __initdata = { | |
403 | /* | |
404 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
405 | */ | |
406 | { | |
407 | .callback = video_set_bqc_offset, | |
408 | .ident = "Acer Aspire 5720", | |
409 | .matches = { | |
410 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
411 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
412 | }, | |
413 | }, | |
5afc4abe LB |
414 | { |
415 | .callback = video_set_bqc_offset, | |
416 | .ident = "Acer Aspire 5710Z", | |
417 | .matches = { | |
418 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
419 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
420 | }, | |
421 | }, | |
34ac272b ZR |
422 | { |
423 | .callback = video_set_bqc_offset, | |
424 | .ident = "eMachines E510", | |
425 | .matches = { | |
426 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
427 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
428 | }, | |
429 | }, | |
93bcece2 ZR |
430 | { |
431 | .callback = video_set_bqc_offset, | |
432 | .ident = "Acer Aspire 5315", | |
433 | .matches = { | |
434 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
435 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
436 | }, | |
437 | }, | |
152a4e63 ZR |
438 | { |
439 | .callback = video_set_bqc_offset, | |
440 | .ident = "Acer Aspire 7720", | |
441 | .matches = { | |
442 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
443 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
444 | }, | |
445 | }, | |
45cb50e6 ZR |
446 | {} |
447 | }; | |
448 | ||
994fa63c DB |
449 | static unsigned long long |
450 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
451 | unsigned long long bqc_value) | |
452 | { | |
453 | unsigned long long level; | |
454 | ||
455 | if (device->brightness->flags._BQC_use_index) { | |
456 | /* | |
457 | * _BQC returns an index that doesn't account for | |
458 | * the first 2 items with special meaning, so we need | |
459 | * to compensate for that by offsetting ourselves | |
460 | */ | |
461 | if (device->brightness->flags._BCL_reversed) | |
462 | bqc_value = device->brightness->count - 3 - bqc_value; | |
463 | ||
464 | level = device->brightness->levels[bqc_value + 2]; | |
465 | } else { | |
466 | level = bqc_value; | |
467 | } | |
468 | ||
469 | level += bqc_offset_aml_bug_workaround; | |
470 | ||
471 | return level; | |
472 | } | |
473 | ||
1da177e4 | 474 | static int |
4be44fcd | 475 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 476 | unsigned long long *level, bool raw) |
1da177e4 | 477 | { |
c8890f90 | 478 | acpi_status status = AE_OK; |
4e231fa4 | 479 | int i; |
c8890f90 | 480 | |
c60d638e ZR |
481 | if (device->cap._BQC || device->cap._BCQ) { |
482 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
483 | ||
484 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
485 | NULL, level); |
486 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
487 | if (raw) { |
488 | /* | |
489 | * Caller has indicated he wants the raw | |
490 | * value returned by _BQC, so don't furtherly | |
491 | * mess with the value. | |
492 | */ | |
493 | return 0; | |
494 | } | |
495 | ||
994fa63c | 496 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 497 | |
4e231fa4 VS |
498 | for (i = 2; i < device->brightness->count; i++) |
499 | if (device->brightness->levels[i] == *level) { | |
500 | device->brightness->curr = *level; | |
501 | return 0; | |
915ea7e4 | 502 | } |
a89803df DB |
503 | /* |
504 | * BQC returned an invalid level. | |
505 | * Stop using it. | |
506 | */ | |
507 | ACPI_WARNING((AE_INFO, | |
508 | "%s returned an invalid level", | |
509 | buf)); | |
510 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 511 | } else { |
21fcb34e FC |
512 | /* |
513 | * Fixme: | |
c8890f90 ZR |
514 | * should we return an error or ignore this failure? |
515 | * dev->brightness->curr is a cached value which stores | |
516 | * the correct current backlight level in most cases. | |
517 | * ACPI video backlight still works w/ buggy _BQC. | |
518 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
519 | */ | |
c60d638e ZR |
520 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
521 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
522 | } |
523 | } | |
524 | ||
4500ca8e | 525 | *level = device->brightness->curr; |
c8890f90 | 526 | return 0; |
1da177e4 LT |
527 | } |
528 | ||
529 | static int | |
4be44fcd LB |
530 | acpi_video_device_EDID(struct acpi_video_device *device, |
531 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 532 | { |
4be44fcd LB |
533 | int status; |
534 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
535 | union acpi_object *obj; | |
536 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
537 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 538 | |
1da177e4 LT |
539 | |
540 | *edid = NULL; | |
541 | ||
542 | if (!device) | |
d550d98d | 543 | return -ENODEV; |
1da177e4 LT |
544 | if (length == 128) |
545 | arg0.integer.value = 1; | |
546 | else if (length == 256) | |
547 | arg0.integer.value = 2; | |
548 | else | |
d550d98d | 549 | return -EINVAL; |
1da177e4 | 550 | |
90130268 | 551 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 552 | if (ACPI_FAILURE(status)) |
d550d98d | 553 | return -ENODEV; |
1da177e4 | 554 | |
50dd0969 | 555 | obj = buffer.pointer; |
1da177e4 LT |
556 | |
557 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
558 | *edid = obj; | |
559 | else { | |
6468463a | 560 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
561 | status = -EFAULT; |
562 | kfree(obj); | |
563 | } | |
564 | ||
d550d98d | 565 | return status; |
1da177e4 LT |
566 | } |
567 | ||
1da177e4 LT |
568 | /* bus */ |
569 | ||
1da177e4 LT |
570 | /* |
571 | * Arg: | |
21fcb34e FC |
572 | * video : video bus device pointer |
573 | * bios_flag : | |
1da177e4 LT |
574 | * 0. The system BIOS should NOT automatically switch(toggle) |
575 | * the active display output. | |
576 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 577 | * active display output. No switch event. |
1da177e4 LT |
578 | * 2. The _DGS value should be locked. |
579 | * 3. The system BIOS should not automatically switch (toggle) the | |
580 | * active display output, but instead generate the display switch | |
581 | * event notify code. | |
582 | * lcd_flag : | |
583 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 584 | * of the LCD when the power changes from AC to DC |
21fcb34e | 585 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 586 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 587 | * Return Value: |
ea9f8856 | 588 | * -EINVAL wrong arg. |
1da177e4 LT |
589 | */ |
590 | ||
591 | static int | |
4be44fcd | 592 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 593 | { |
ea9f8856 | 594 | acpi_status status; |
1da177e4 | 595 | |
b0373843 ZR |
596 | if (!video->cap._DOS) |
597 | return 0; | |
1da177e4 | 598 | |
ea9f8856 IM |
599 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
600 | return -EINVAL; | |
0db98202 JL |
601 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
602 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
603 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
604 | if (ACPI_FAILURE(status)) |
605 | return -EIO; | |
1da177e4 | 606 | |
ea9f8856 | 607 | return 0; |
1da177e4 LT |
608 | } |
609 | ||
935e5f29 ZR |
610 | /* |
611 | * Simple comparison function used to sort backlight levels. | |
612 | */ | |
613 | ||
614 | static int | |
615 | acpi_video_cmp_level(const void *a, const void *b) | |
616 | { | |
617 | return *(int *)a - *(int *)b; | |
618 | } | |
619 | ||
a50188da AL |
620 | /* |
621 | * Decides if _BQC/_BCQ for this system is usable | |
622 | * | |
623 | * We do this by changing the level first and then read out the current | |
624 | * brightness level, if the value does not match, find out if it is using | |
625 | * index. If not, clear the _BQC/_BCQ capability. | |
626 | */ | |
627 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
628 | int max_level, int current_level) | |
629 | { | |
630 | struct acpi_video_device_brightness *br = device->brightness; | |
631 | int result; | |
632 | unsigned long long level; | |
633 | int test_level; | |
634 | ||
635 | /* don't mess with existing known broken systems */ | |
636 | if (bqc_offset_aml_bug_workaround) | |
637 | return 0; | |
638 | ||
639 | /* | |
640 | * Some systems always report current brightness level as maximum | |
641 | * through _BQC, we need to test another value for them. | |
642 | */ | |
b3b301c5 | 643 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
644 | |
645 | result = acpi_video_device_lcd_set_level(device, test_level); | |
646 | if (result) | |
647 | return result; | |
648 | ||
649 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
650 | if (result) | |
651 | return result; | |
652 | ||
653 | if (level != test_level) { | |
654 | /* buggy _BQC found, need to find out if it uses index */ | |
655 | if (level < br->count) { | |
656 | if (br->flags._BCL_reversed) | |
657 | level = br->count - 3 - level; | |
658 | if (br->levels[level + 2] == test_level) | |
659 | br->flags._BQC_use_index = 1; | |
660 | } | |
661 | ||
662 | if (!br->flags._BQC_use_index) | |
663 | device->cap._BQC = device->cap._BCQ = 0; | |
664 | } | |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
669 | ||
1da177e4 | 670 | /* |
21fcb34e FC |
671 | * Arg: |
672 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
673 | * |
674 | * Return Value: | |
469778c1 JJ |
675 | * Maximum brightness level |
676 | * | |
677 | * Allocate and initialize device->brightness. | |
678 | */ | |
679 | ||
680 | static int | |
681 | acpi_video_init_brightness(struct acpi_video_device *device) | |
682 | { | |
683 | union acpi_object *obj = NULL; | |
d32f6947 | 684 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 685 | unsigned long long level, level_old; |
469778c1 JJ |
686 | union acpi_object *o; |
687 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 688 | int result = -EINVAL; |
469778c1 JJ |
689 | |
690 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
691 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
692 | "LCD brightness level\n")); | |
693 | goto out; | |
694 | } | |
695 | ||
696 | if (obj->package.count < 2) | |
697 | goto out; | |
698 | ||
699 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
700 | if (!br) { | |
701 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 702 | result = -ENOMEM; |
469778c1 JJ |
703 | goto out; |
704 | } | |
705 | ||
d32f6947 | 706 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 707 | GFP_KERNEL); |
1a7c618a ZR |
708 | if (!br->levels) { |
709 | result = -ENOMEM; | |
469778c1 | 710 | goto out_free; |
1a7c618a | 711 | } |
469778c1 JJ |
712 | |
713 | for (i = 0; i < obj->package.count; i++) { | |
714 | o = (union acpi_object *)&obj->package.elements[i]; | |
715 | if (o->type != ACPI_TYPE_INTEGER) { | |
716 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
717 | continue; | |
718 | } | |
719 | br->levels[count] = (u32) o->integer.value; | |
720 | ||
721 | if (br->levels[count] > max_level) | |
722 | max_level = br->levels[count]; | |
723 | count++; | |
724 | } | |
725 | ||
d32f6947 ZR |
726 | /* |
727 | * some buggy BIOS don't export the levels | |
728 | * when machine is on AC/Battery in _BCL package. | |
729 | * In this case, the first two elements in _BCL packages | |
730 | * are also supported brightness levels that OS should take care of. | |
731 | */ | |
90af2cf6 ZR |
732 | for (i = 2; i < count; i++) { |
733 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 734 | level_ac_battery++; |
90af2cf6 ZR |
735 | if (br->levels[i] == br->levels[1]) |
736 | level_ac_battery++; | |
737 | } | |
d32f6947 ZR |
738 | |
739 | if (level_ac_battery < 2) { | |
740 | level_ac_battery = 2 - level_ac_battery; | |
741 | br->flags._BCL_no_ac_battery_levels = 1; | |
742 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
743 | br->levels[i] = br->levels[i - level_ac_battery]; | |
744 | count += level_ac_battery; | |
745 | } else if (level_ac_battery > 2) | |
bf6787eb | 746 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 747 | |
d80fb99f ZR |
748 | /* Check if the _BCL package is in a reversed order */ |
749 | if (max_level == br->levels[2]) { | |
750 | br->flags._BCL_reversed = 1; | |
751 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
752 | acpi_video_cmp_level, NULL); | |
753 | } else if (max_level != br->levels[count - 1]) | |
754 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 755 | "Found unordered _BCL package")); |
469778c1 JJ |
756 | |
757 | br->count = count; | |
758 | device->brightness = br; | |
1a7c618a | 759 | |
1a7c618a | 760 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 761 | br->curr = level = max_level; |
e047cca6 ZR |
762 | |
763 | if (!device->cap._BQC) | |
764 | goto set_level; | |
765 | ||
a89803df DB |
766 | result = acpi_video_device_lcd_get_level_current(device, |
767 | &level_old, true); | |
1a7c618a ZR |
768 | if (result) |
769 | goto out_free_levels; | |
770 | ||
a50188da | 771 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
772 | if (result) |
773 | goto out_free_levels; | |
a50188da AL |
774 | /* |
775 | * cap._BQC may get cleared due to _BQC is found to be broken | |
776 | * in acpi_video_bqc_quirk, so check again here. | |
777 | */ | |
778 | if (!device->cap._BQC) | |
779 | goto set_level; | |
e047cca6 | 780 | |
545ef368 AL |
781 | level = acpi_video_bqc_value_to_level(device, level_old); |
782 | /* | |
783 | * On some buggy laptops, _BQC returns an uninitialized | |
784 | * value when invoked for the first time, i.e. | |
785 | * level_old is invalid (no matter whether it's a level | |
786 | * or an index). Set the backlight to max_level in this case. | |
787 | */ | |
788 | for (i = 2; i < br->count; i++) | |
789 | if (level == br->levels[i]) | |
790 | break; | |
791 | if (i == br->count || !level) | |
792 | level = max_level; | |
e047cca6 | 793 | |
e047cca6 | 794 | set_level: |
90c53ca4 | 795 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
796 | if (result) |
797 | goto out_free_levels; | |
1a7c618a | 798 | |
d32f6947 ZR |
799 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
800 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 801 | kfree(obj); |
1a7c618a | 802 | return result; |
469778c1 JJ |
803 | |
804 | out_free_levels: | |
805 | kfree(br->levels); | |
806 | out_free: | |
807 | kfree(br); | |
808 | out: | |
809 | device->brightness = NULL; | |
810 | kfree(obj); | |
1a7c618a | 811 | return result; |
469778c1 JJ |
812 | } |
813 | ||
814 | /* | |
815 | * Arg: | |
816 | * device : video output device (LCD, CRT, ..) | |
817 | * | |
818 | * Return Value: | |
21fcb34e | 819 | * None |
1da177e4 | 820 | * |
98fb8fe1 | 821 | * Find out all required AML methods defined under the output |
1da177e4 LT |
822 | * device. |
823 | */ | |
824 | ||
4be44fcd | 825 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 826 | { |
952c63e9 | 827 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 828 | device->cap._ADR = 1; |
952c63e9 | 829 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 830 | device->cap._BCL = 1; |
952c63e9 | 831 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 832 | device->cap._BCM = 1; |
952c63e9 | 833 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 834 | device->cap._BQC = 1; |
952c63e9 | 835 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
836 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
837 | device->cap._BCQ = 1; | |
838 | } | |
839 | ||
952c63e9 | 840 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 841 | device->cap._DDC = 1; |
1da177e4 LT |
842 | } |
843 | ||
844 | /* | |
21fcb34e FC |
845 | * Arg: |
846 | * device : video output device (VGA) | |
1da177e4 LT |
847 | * |
848 | * Return Value: | |
21fcb34e | 849 | * None |
1da177e4 | 850 | * |
98fb8fe1 | 851 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
852 | */ |
853 | ||
4be44fcd | 854 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 855 | { |
952c63e9 | 856 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 857 | video->cap._DOS = 1; |
952c63e9 | 858 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 859 | video->cap._DOD = 1; |
952c63e9 | 860 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 861 | video->cap._ROM = 1; |
952c63e9 | 862 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 863 | video->cap._GPD = 1; |
952c63e9 | 864 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 865 | video->cap._SPD = 1; |
952c63e9 | 866 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 867 | video->cap._VPO = 1; |
1da177e4 LT |
868 | } |
869 | ||
870 | /* | |
871 | * Check whether the video bus device has required AML method to | |
872 | * support the desired features | |
873 | */ | |
874 | ||
4be44fcd | 875 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 876 | { |
4be44fcd | 877 | acpi_status status = -ENOENT; |
1e4cffe7 | 878 | struct pci_dev *dev; |
1da177e4 LT |
879 | |
880 | if (!video) | |
d550d98d | 881 | return -EINVAL; |
1da177e4 | 882 | |
1e4cffe7 | 883 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
884 | if (!dev) |
885 | return -ENODEV; | |
1e4cffe7 | 886 | pci_dev_put(dev); |
22c13f9d | 887 | |
21fcb34e FC |
888 | /* |
889 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
890 | * to check well known required nodes. |
891 | */ | |
892 | ||
98fb8fe1 | 893 | /* Does this device support video switching? */ |
3a1151e3 SB |
894 | if (video->cap._DOS || video->cap._DOD) { |
895 | if (!video->cap._DOS) { | |
896 | printk(KERN_WARNING FW_BUG | |
897 | "ACPI(%s) defines _DOD but not _DOS\n", | |
898 | acpi_device_bid(video->device)); | |
899 | } | |
1da177e4 LT |
900 | video->flags.multihead = 1; |
901 | status = 0; | |
902 | } | |
903 | ||
98fb8fe1 | 904 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 905 | if (video->cap._ROM) { |
1da177e4 LT |
906 | video->flags.rom = 1; |
907 | status = 0; | |
908 | } | |
909 | ||
98fb8fe1 | 910 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 911 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
912 | video->flags.post = 1; |
913 | status = 0; | |
914 | } | |
915 | ||
d550d98d | 916 | return status; |
1da177e4 LT |
917 | } |
918 | ||
21fcb34e FC |
919 | /* |
920 | * -------------------------------------------------------------------------- | |
921 | * Driver Interface | |
922 | * -------------------------------------------------------------------------- | |
923 | */ | |
1da177e4 LT |
924 | |
925 | /* device interface */ | |
915ea7e4 | 926 | static struct acpi_video_device_attrib * |
82cae999 RZ |
927 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
928 | { | |
78eed028 DT |
929 | struct acpi_video_enumerated_device *ids; |
930 | int i; | |
931 | ||
932 | for (i = 0; i < video->attached_count; i++) { | |
933 | ids = &video->attached_array[i]; | |
934 | if ((ids->value.int_val & 0xffff) == device_id) | |
935 | return &ids->value.attrib; | |
936 | } | |
82cae999 | 937 | |
82cae999 RZ |
938 | return NULL; |
939 | } | |
1da177e4 | 940 | |
e92a7162 MG |
941 | static int |
942 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
943 | unsigned long device_id) | |
944 | { | |
945 | struct acpi_video_enumerated_device *ids; | |
946 | int i; | |
947 | ||
948 | for (i = 0; i < video->attached_count; i++) { | |
949 | ids = &video->attached_array[i]; | |
950 | if ((ids->value.int_val & 0xffff) == device_id) | |
951 | return ids->value.int_val; | |
952 | } | |
953 | ||
954 | return 0; | |
955 | } | |
956 | ||
1da177e4 | 957 | static int |
4be44fcd LB |
958 | acpi_video_bus_get_one_device(struct acpi_device *device, |
959 | struct acpi_video_bus *video) | |
1da177e4 | 960 | { |
27663c58 | 961 | unsigned long long device_id; |
e92a7162 | 962 | int status, device_type; |
4be44fcd | 963 | struct acpi_video_device *data; |
915ea7e4 | 964 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 965 | |
4be44fcd LB |
966 | status = |
967 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
968 | /* Some device omits _ADR, we skip them instead of fail */ |
969 | if (ACPI_FAILURE(status)) | |
970 | return 0; | |
1da177e4 | 971 | |
91e13aa3 AL |
972 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
973 | if (!data) | |
974 | return -ENOMEM; | |
82cae999 | 975 | |
91e13aa3 AL |
976 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
977 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
978 | device->driver_data = data; | |
979 | ||
980 | data->device_id = device_id; | |
981 | data->video = video; | |
982 | data->dev = device; | |
983 | ||
984 | attribute = acpi_video_get_device_attr(video, device_id); | |
985 | ||
915ea7e4 | 986 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
987 | switch (attribute->display_type) { |
988 | case ACPI_VIDEO_DISPLAY_CRT: | |
989 | data->flags.crt = 1; | |
990 | break; | |
991 | case ACPI_VIDEO_DISPLAY_TV: | |
992 | data->flags.tvout = 1; | |
993 | break; | |
994 | case ACPI_VIDEO_DISPLAY_DVI: | |
995 | data->flags.dvi = 1; | |
996 | break; | |
997 | case ACPI_VIDEO_DISPLAY_LCD: | |
998 | data->flags.lcd = 1; | |
999 | break; | |
1000 | default: | |
1001 | data->flags.unknown = 1; | |
1002 | break; | |
1003 | } | |
915ea7e4 | 1004 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1005 | data->flags.bios = 1; |
1006 | } else { | |
1007 | /* Check for legacy IDs */ | |
1008 | device_type = acpi_video_get_device_type(video, device_id); | |
1009 | /* Ignore bits 16 and 18-20 */ | |
1010 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1011 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1012 | data->flags.crt = 1; | |
1013 | break; | |
1014 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1015 | data->flags.lcd = 1; | |
1016 | break; | |
1017 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1018 | data->flags.tvout = 1; | |
1019 | break; | |
1020 | default: | |
1021 | data->flags.unknown = 1; | |
e92a7162 | 1022 | } |
91e13aa3 | 1023 | } |
4be44fcd | 1024 | |
91e13aa3 AL |
1025 | acpi_video_device_bind(video, data); |
1026 | acpi_video_device_find_cap(data); | |
1da177e4 | 1027 | |
91e13aa3 AL |
1028 | mutex_lock(&video->device_list_lock); |
1029 | list_add_tail(&data->entry, &video->video_device_list); | |
1030 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1031 | |
91e13aa3 | 1032 | return status; |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | /* | |
1036 | * Arg: | |
21fcb34e | 1037 | * video : video bus device |
1da177e4 LT |
1038 | * |
1039 | * Return: | |
21fcb34e FC |
1040 | * none |
1041 | * | |
1042 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1043 | * bind the ids with the corresponding video devices |
1044 | * under the video bus. | |
4be44fcd | 1045 | */ |
1da177e4 | 1046 | |
4be44fcd | 1047 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1048 | { |
ff102ea9 DT |
1049 | struct acpi_video_device *dev; |
1050 | ||
bbac81f5 | 1051 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1052 | |
1053 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1054 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1055 | |
bbac81f5 | 1056 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1057 | } |
1058 | ||
1059 | /* | |
1060 | * Arg: | |
21fcb34e FC |
1061 | * video : video bus device |
1062 | * device : video output device under the video | |
1063 | * bus | |
1da177e4 LT |
1064 | * |
1065 | * Return: | |
21fcb34e FC |
1066 | * none |
1067 | * | |
1da177e4 LT |
1068 | * Bind the ids with the corresponding video devices |
1069 | * under the video bus. | |
4be44fcd | 1070 | */ |
1da177e4 LT |
1071 | |
1072 | static void | |
4be44fcd LB |
1073 | acpi_video_device_bind(struct acpi_video_bus *video, |
1074 | struct acpi_video_device *device) | |
1da177e4 | 1075 | { |
78eed028 | 1076 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1077 | int i; |
1da177e4 | 1078 | |
78eed028 DT |
1079 | for (i = 0; i < video->attached_count; i++) { |
1080 | ids = &video->attached_array[i]; | |
1081 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1082 | ids->bind_info = device; | |
1da177e4 LT |
1083 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1084 | } | |
1085 | } | |
1da177e4 LT |
1086 | } |
1087 | ||
1088 | /* | |
1089 | * Arg: | |
21fcb34e | 1090 | * video : video bus device |
1da177e4 LT |
1091 | * |
1092 | * Return: | |
21fcb34e FC |
1093 | * < 0 : error |
1094 | * | |
1da177e4 LT |
1095 | * Call _DOD to enumerate all devices attached to display adapter |
1096 | * | |
4be44fcd | 1097 | */ |
1da177e4 LT |
1098 | |
1099 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1100 | { | |
4be44fcd LB |
1101 | int status; |
1102 | int count; | |
1103 | int i; | |
78eed028 | 1104 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1105 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1106 | union acpi_object *dod = NULL; | |
1107 | union acpi_object *obj; | |
1da177e4 | 1108 | |
90130268 | 1109 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1110 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1111 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1112 | return status; |
1da177e4 LT |
1113 | } |
1114 | ||
50dd0969 | 1115 | dod = buffer.pointer; |
1da177e4 | 1116 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1117 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1118 | status = -EFAULT; |
1119 | goto out; | |
1120 | } | |
1121 | ||
1122 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1123 | dod->package.count)); |
1da177e4 | 1124 | |
78eed028 DT |
1125 | active_list = kcalloc(1 + dod->package.count, |
1126 | sizeof(struct acpi_video_enumerated_device), | |
1127 | GFP_KERNEL); | |
1128 | if (!active_list) { | |
1da177e4 LT |
1129 | status = -ENOMEM; |
1130 | goto out; | |
1131 | } | |
1132 | ||
1133 | count = 0; | |
1134 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1135 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1136 | |
1137 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1138 | printk(KERN_ERR PREFIX |
1139 | "Invalid _DOD data in element %d\n", i); | |
1140 | continue; | |
1da177e4 | 1141 | } |
78eed028 DT |
1142 | |
1143 | active_list[count].value.int_val = obj->integer.value; | |
1144 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1145 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1146 | (int)obj->integer.value)); | |
1da177e4 LT |
1147 | count++; |
1148 | } | |
1da177e4 | 1149 | |
6044ec88 | 1150 | kfree(video->attached_array); |
4be44fcd | 1151 | |
78eed028 | 1152 | video->attached_array = active_list; |
1da177e4 | 1153 | video->attached_count = count; |
78eed028 | 1154 | |
915ea7e4 | 1155 | out: |
02438d87 | 1156 | kfree(buffer.pointer); |
d550d98d | 1157 | return status; |
1da177e4 LT |
1158 | } |
1159 | ||
4be44fcd LB |
1160 | static int |
1161 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1162 | u32 level_current, u32 event) | |
1da177e4 | 1163 | { |
63f0edfc | 1164 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1165 | max = max_below = 0; |
1166 | min = min_above = 255; | |
63f0edfc | 1167 | /* Find closest level to level_current */ |
0a3db1ce | 1168 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1169 | l = device->brightness->levels[i]; |
1170 | if (abs(l - level_current) < abs(delta)) { | |
1171 | delta = l - level_current; | |
1172 | if (!delta) | |
1173 | break; | |
1174 | } | |
1175 | } | |
1176 | /* Ajust level_current to closest available level */ | |
1177 | level_current += delta; | |
0a3db1ce | 1178 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1179 | l = device->brightness->levels[i]; |
1180 | if (l < min) | |
1181 | min = l; | |
1182 | if (l > max) | |
1183 | max = l; | |
1184 | if (l < min_above && l > level_current) | |
1185 | min_above = l; | |
1186 | if (l > max_below && l < level_current) | |
1187 | max_below = l; | |
1188 | } | |
1189 | ||
1190 | switch (event) { | |
1191 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1192 | return (level_current < max) ? min_above : min; | |
1193 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1194 | return (level_current < max) ? min_above : max; | |
1195 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1196 | return (level_current > min) ? max_below : min; | |
1197 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1198 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1199 | return 0; | |
1200 | default: | |
1201 | return level_current; | |
1202 | } | |
1da177e4 LT |
1203 | } |
1204 | ||
c8890f90 | 1205 | static int |
4be44fcd | 1206 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1207 | { |
27663c58 | 1208 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1209 | int result = -EINVAL; |
1210 | ||
fbc9fe1b AL |
1211 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1212 | if (!acpi_video_verify_backlight_support()) | |
28c32e99 ZR |
1213 | return 0; |
1214 | ||
469778c1 | 1215 | if (!device->brightness) |
c8890f90 ZR |
1216 | goto out; |
1217 | ||
1218 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1219 | &level_current, |
1220 | false); | |
c8890f90 ZR |
1221 | if (result) |
1222 | goto out; | |
1223 | ||
1da177e4 | 1224 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1225 | |
24450c7a | 1226 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1227 | |
36342742 MG |
1228 | if (!result) |
1229 | backlight_force_update(device->backlight, | |
1230 | BACKLIGHT_UPDATE_HOTKEY); | |
1231 | ||
c8890f90 ZR |
1232 | out: |
1233 | if (result) | |
1234 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1235 | ||
1236 | return result; | |
1da177e4 LT |
1237 | } |
1238 | ||
e92a7162 MG |
1239 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1240 | void **edid) | |
1241 | { | |
1242 | struct acpi_video_bus *video; | |
1243 | struct acpi_video_device *video_device; | |
1244 | union acpi_object *buffer = NULL; | |
1245 | acpi_status status; | |
1246 | int i, length; | |
1247 | ||
1248 | if (!device || !acpi_driver_data(device)) | |
1249 | return -EINVAL; | |
1250 | ||
1251 | video = acpi_driver_data(device); | |
1252 | ||
1253 | for (i = 0; i < video->attached_count; i++) { | |
1254 | video_device = video->attached_array[i].bind_info; | |
1255 | length = 256; | |
1256 | ||
1257 | if (!video_device) | |
1258 | continue; | |
1259 | ||
82069552 ZR |
1260 | if (!video_device->cap._DDC) |
1261 | continue; | |
1262 | ||
e92a7162 MG |
1263 | if (type) { |
1264 | switch (type) { | |
1265 | case ACPI_VIDEO_DISPLAY_CRT: | |
1266 | if (!video_device->flags.crt) | |
1267 | continue; | |
1268 | break; | |
1269 | case ACPI_VIDEO_DISPLAY_TV: | |
1270 | if (!video_device->flags.tvout) | |
1271 | continue; | |
1272 | break; | |
1273 | case ACPI_VIDEO_DISPLAY_DVI: | |
1274 | if (!video_device->flags.dvi) | |
1275 | continue; | |
1276 | break; | |
1277 | case ACPI_VIDEO_DISPLAY_LCD: | |
1278 | if (!video_device->flags.lcd) | |
1279 | continue; | |
1280 | break; | |
1281 | } | |
1282 | } else if (video_device->device_id != device_id) { | |
1283 | continue; | |
1284 | } | |
1285 | ||
1286 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1287 | ||
1288 | if (ACPI_FAILURE(status) || !buffer || | |
1289 | buffer->type != ACPI_TYPE_BUFFER) { | |
1290 | length = 128; | |
1291 | status = acpi_video_device_EDID(video_device, &buffer, | |
1292 | length); | |
1293 | if (ACPI_FAILURE(status) || !buffer || | |
1294 | buffer->type != ACPI_TYPE_BUFFER) { | |
1295 | continue; | |
1296 | } | |
1297 | } | |
1298 | ||
1299 | *edid = buffer->buffer.pointer; | |
1300 | return length; | |
1301 | } | |
1302 | ||
1303 | return -ENODEV; | |
1304 | } | |
1305 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1306 | ||
1da177e4 | 1307 | static int |
4be44fcd LB |
1308 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1309 | struct acpi_device *device) | |
1da177e4 | 1310 | { |
fba4e087 | 1311 | int status = 0; |
ff102ea9 | 1312 | struct acpi_device *dev; |
1da177e4 | 1313 | |
fba4e087 IM |
1314 | /* |
1315 | * There are systems where video module known to work fine regardless | |
1316 | * of broken _DOD and ignoring returned value here doesn't cause | |
1317 | * any issues later. | |
1318 | */ | |
1319 | acpi_video_device_enumerate(video); | |
1da177e4 | 1320 | |
ff102ea9 | 1321 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1322 | |
1323 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1324 | if (status) { |
91e13aa3 AL |
1325 | dev_err(&dev->dev, "Can't attach device\n"); |
1326 | break; | |
1da177e4 | 1327 | } |
1da177e4 | 1328 | } |
d550d98d | 1329 | return status; |
1da177e4 LT |
1330 | } |
1331 | ||
1da177e4 LT |
1332 | /* acpi_video interface */ |
1333 | ||
efaa14c7 AL |
1334 | /* |
1335 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1336 | * preform any automatic brightness change on receiving a notification. | |
1337 | */ | |
4be44fcd | 1338 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1339 | { |
efaa14c7 | 1340 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1341 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1342 | } |
1343 | ||
4be44fcd | 1344 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1345 | { |
efaa14c7 | 1346 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1347 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1348 | } |
1349 | ||
7015558f | 1350 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1351 | { |
7015558f | 1352 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1353 | struct input_dev *input; |
17c452f9 | 1354 | int keycode = 0; |
e9dab196 | 1355 | |
67b662e1 | 1356 | if (!video || !video->input) |
d550d98d | 1357 | return; |
1da177e4 | 1358 | |
e9dab196 | 1359 | input = video->input; |
1da177e4 LT |
1360 | |
1361 | switch (event) { | |
98fb8fe1 | 1362 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1363 | * most likely via hotkey. */ |
8a37c65d | 1364 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1365 | break; |
1366 | ||
98fb8fe1 | 1367 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1368 | * connector. */ |
1369 | acpi_video_device_enumerate(video); | |
1370 | acpi_video_device_rebind(video); | |
e9dab196 | 1371 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1372 | break; |
1373 | ||
4be44fcd | 1374 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1375 | keycode = KEY_SWITCHVIDEOMODE; |
1376 | break; | |
4be44fcd | 1377 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1378 | keycode = KEY_VIDEO_NEXT; |
1379 | break; | |
4be44fcd | 1380 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1381 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1382 | break; |
1383 | ||
1384 | default: | |
1385 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1386 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1387 | break; |
1388 | } | |
1389 | ||
8a37c65d LT |
1390 | if (acpi_notifier_call_chain(device, event, 0)) |
1391 | /* Something vetoed the keypress. */ | |
1392 | keycode = 0; | |
17c452f9 MG |
1393 | |
1394 | if (keycode) { | |
1395 | input_report_key(input, keycode, 1); | |
1396 | input_sync(input); | |
1397 | input_report_key(input, keycode, 0); | |
1398 | input_sync(input); | |
1399 | } | |
e9dab196 | 1400 | |
d550d98d | 1401 | return; |
1da177e4 LT |
1402 | } |
1403 | ||
4be44fcd | 1404 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1405 | { |
50dd0969 | 1406 | struct acpi_video_device *video_device = data; |
4be44fcd | 1407 | struct acpi_device *device = NULL; |
e9dab196 LY |
1408 | struct acpi_video_bus *bus; |
1409 | struct input_dev *input; | |
17c452f9 | 1410 | int keycode = 0; |
1da177e4 | 1411 | |
1da177e4 | 1412 | if (!video_device) |
d550d98d | 1413 | return; |
1da177e4 | 1414 | |
e6afa0de | 1415 | device = video_device->dev; |
e9dab196 LY |
1416 | bus = video_device->video; |
1417 | input = bus->input; | |
1da177e4 LT |
1418 | |
1419 | switch (event) { | |
4be44fcd | 1420 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1421 | if (brightness_switch_enabled) |
1422 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1423 | keycode = KEY_BRIGHTNESS_CYCLE; |
1424 | break; | |
4be44fcd | 1425 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1426 | if (brightness_switch_enabled) |
1427 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1428 | keycode = KEY_BRIGHTNESSUP; |
1429 | break; | |
4be44fcd | 1430 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1431 | if (brightness_switch_enabled) |
1432 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1433 | keycode = KEY_BRIGHTNESSDOWN; |
1434 | break; | |
70f23fd6 | 1435 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1436 | if (brightness_switch_enabled) |
1437 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1438 | keycode = KEY_BRIGHTNESS_ZERO; |
1439 | break; | |
4be44fcd | 1440 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1441 | if (brightness_switch_enabled) |
1442 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 | 1443 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1444 | break; |
1445 | default: | |
1446 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1447 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1448 | break; |
1449 | } | |
e9dab196 | 1450 | |
7761f638 | 1451 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1452 | |
1453 | if (keycode) { | |
1454 | input_report_key(input, keycode, 1); | |
1455 | input_sync(input); | |
1456 | input_report_key(input, keycode, 0); | |
1457 | input_sync(input); | |
1458 | } | |
e9dab196 | 1459 | |
d550d98d | 1460 | return; |
1da177e4 LT |
1461 | } |
1462 | ||
ac7729da RW |
1463 | static int acpi_video_resume(struct notifier_block *nb, |
1464 | unsigned long val, void *ign) | |
863c1490 MG |
1465 | { |
1466 | struct acpi_video_bus *video; | |
1467 | struct acpi_video_device *video_device; | |
1468 | int i; | |
1469 | ||
ac7729da RW |
1470 | switch (val) { |
1471 | case PM_HIBERNATION_PREPARE: | |
1472 | case PM_SUSPEND_PREPARE: | |
1473 | case PM_RESTORE_PREPARE: | |
1474 | return NOTIFY_DONE; | |
1475 | } | |
863c1490 | 1476 | |
ac7729da RW |
1477 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1478 | ||
1479 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1480 | |
1481 | for (i = 0; i < video->attached_count; i++) { | |
1482 | video_device = video->attached_array[i].bind_info; | |
1483 | if (video_device && video_device->backlight) | |
1484 | acpi_video_set_brightness(video_device->backlight); | |
1485 | } | |
ac7729da RW |
1486 | |
1487 | return NOTIFY_OK; | |
863c1490 MG |
1488 | } |
1489 | ||
c504f8cb ZR |
1490 | static acpi_status |
1491 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1492 | void **return_value) | |
1493 | { | |
1494 | struct acpi_device *device = context; | |
1495 | struct acpi_device *sibling; | |
1496 | int result; | |
1497 | ||
1498 | if (handle == device->handle) | |
1499 | return AE_CTRL_TERMINATE; | |
1500 | ||
1501 | result = acpi_bus_get_device(handle, &sibling); | |
1502 | if (result) | |
1503 | return AE_OK; | |
1504 | ||
1505 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1506 | return AE_ALREADY_EXISTS; | |
1507 | ||
1508 | return AE_OK; | |
1509 | } | |
1510 | ||
67b662e1 AL |
1511 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1512 | { | |
fbc9fe1b | 1513 | if (acpi_video_verify_backlight_support()) { |
67b662e1 AL |
1514 | struct backlight_properties props; |
1515 | struct pci_dev *pdev; | |
1516 | acpi_handle acpi_parent; | |
1517 | struct device *parent = NULL; | |
1518 | int result; | |
1519 | static int count; | |
1520 | char *name; | |
1521 | ||
1522 | result = acpi_video_init_brightness(device); | |
1523 | if (result) | |
1524 | return; | |
1525 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1526 | if (!name) | |
1527 | return; | |
1528 | count++; | |
1529 | ||
1530 | acpi_get_parent(device->dev->handle, &acpi_parent); | |
1531 | ||
1532 | pdev = acpi_get_pci_dev(acpi_parent); | |
1533 | if (pdev) { | |
1534 | parent = &pdev->dev; | |
1535 | pci_dev_put(pdev); | |
1536 | } | |
1537 | ||
1538 | memset(&props, 0, sizeof(struct backlight_properties)); | |
1539 | props.type = BACKLIGHT_FIRMWARE; | |
1540 | props.max_brightness = device->brightness->count - 3; | |
1541 | device->backlight = backlight_device_register(name, | |
1542 | parent, | |
1543 | device, | |
1544 | &acpi_backlight_ops, | |
1545 | &props); | |
1546 | kfree(name); | |
1547 | if (IS_ERR(device->backlight)) | |
1548 | return; | |
1549 | ||
1550 | /* | |
1551 | * Save current brightness level in case we have to restore it | |
1552 | * before acpi_video_device_lcd_set_level() is called next time. | |
1553 | */ | |
1554 | device->backlight->props.brightness = | |
1555 | acpi_video_get_brightness(device->backlight); | |
1556 | ||
1557 | device->cooling_dev = thermal_cooling_device_register("LCD", | |
1558 | device->dev, &video_cooling_ops); | |
1559 | if (IS_ERR(device->cooling_dev)) { | |
1560 | /* | |
1561 | * Set cooling_dev to NULL so we don't crash trying to | |
1562 | * free it. | |
1563 | * Also, why the hell we are returning early and | |
1564 | * not attempt to register video output if cooling | |
1565 | * device registration failed? | |
1566 | * -- dtor | |
1567 | */ | |
1568 | device->cooling_dev = NULL; | |
1569 | return; | |
1570 | } | |
1571 | ||
1572 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1573 | device->cooling_dev->id); | |
1574 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1575 | &device->cooling_dev->device.kobj, | |
1576 | "thermal_cooling"); | |
1577 | if (result) | |
1578 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1579 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1580 | &device->dev->dev.kobj, "device"); | |
1581 | if (result) | |
1582 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) | |
1587 | { | |
1588 | struct acpi_video_device *dev; | |
1589 | ||
1590 | mutex_lock(&video->device_list_lock); | |
1591 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1592 | acpi_video_dev_register_backlight(dev); | |
1593 | mutex_unlock(&video->device_list_lock); | |
1594 | ||
1595 | video->pm_nb.notifier_call = acpi_video_resume; | |
1596 | video->pm_nb.priority = 0; | |
1597 | return register_pm_notifier(&video->pm_nb); | |
1598 | } | |
1599 | ||
1600 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1601 | { | |
1602 | if (device->backlight) { | |
1603 | backlight_device_unregister(device->backlight); | |
1604 | device->backlight = NULL; | |
1605 | } | |
1606 | if (device->brightness) { | |
1607 | kfree(device->brightness->levels); | |
1608 | kfree(device->brightness); | |
1609 | device->brightness = NULL; | |
1610 | } | |
1611 | if (device->cooling_dev) { | |
1612 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1613 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1614 | thermal_cooling_device_unregister(device->cooling_dev); | |
1615 | device->cooling_dev = NULL; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1620 | { | |
1621 | struct acpi_video_device *dev; | |
1622 | int error = unregister_pm_notifier(&video->pm_nb); | |
1623 | ||
1624 | mutex_lock(&video->device_list_lock); | |
1625 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1626 | acpi_video_dev_unregister_backlight(dev); | |
1627 | mutex_unlock(&video->device_list_lock); | |
1628 | ||
1629 | return error; | |
1630 | } | |
1631 | ||
1632 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1633 | { | |
1634 | acpi_status status; | |
1635 | struct acpi_device *adev = device->dev; | |
1636 | ||
1637 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1638 | acpi_video_device_notify, device); | |
1639 | if (ACPI_FAILURE(status)) | |
1640 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1641 | else | |
1642 | device->flags.notify = 1; | |
1643 | } | |
1644 | ||
1645 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1646 | { | |
1647 | struct input_dev *input; | |
1648 | struct acpi_video_device *dev; | |
1649 | int error; | |
1650 | ||
1651 | video->input = input = input_allocate_device(); | |
1652 | if (!input) { | |
1653 | error = -ENOMEM; | |
1654 | goto out; | |
1655 | } | |
1656 | ||
1657 | error = acpi_video_bus_start_devices(video); | |
1658 | if (error) | |
1659 | goto err_free_input; | |
1660 | ||
1661 | snprintf(video->phys, sizeof(video->phys), | |
1662 | "%s/video/input0", acpi_device_hid(video->device)); | |
1663 | ||
1664 | input->name = acpi_device_name(video->device); | |
1665 | input->phys = video->phys; | |
1666 | input->id.bustype = BUS_HOST; | |
1667 | input->id.product = 0x06; | |
1668 | input->dev.parent = &video->device->dev; | |
1669 | input->evbit[0] = BIT(EV_KEY); | |
1670 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1671 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1672 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1673 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1674 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1675 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1676 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1677 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1678 | ||
1679 | error = input_register_device(input); | |
1680 | if (error) | |
1681 | goto err_stop_dev; | |
1682 | ||
1683 | mutex_lock(&video->device_list_lock); | |
1684 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1685 | acpi_video_dev_add_notify_handler(dev); | |
1686 | mutex_unlock(&video->device_list_lock); | |
1687 | ||
1688 | return 0; | |
1689 | ||
1690 | err_stop_dev: | |
1691 | acpi_video_bus_stop_devices(video); | |
1692 | err_free_input: | |
1693 | input_free_device(input); | |
1694 | video->input = NULL; | |
1695 | out: | |
1696 | return error; | |
1697 | } | |
1698 | ||
1699 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1700 | { | |
1701 | if (dev->flags.notify) { | |
1702 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1703 | acpi_video_device_notify); | |
1704 | dev->flags.notify = 0; | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1709 | { | |
1710 | struct acpi_video_device *dev; | |
1711 | ||
1712 | mutex_lock(&video->device_list_lock); | |
1713 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1714 | acpi_video_dev_remove_notify_handler(dev); | |
1715 | mutex_unlock(&video->device_list_lock); | |
1716 | ||
1717 | acpi_video_bus_stop_devices(video); | |
1718 | input_unregister_device(video->input); | |
1719 | video->input = NULL; | |
1720 | } | |
1721 | ||
1722 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1723 | { | |
1724 | struct acpi_video_device *dev, *next; | |
1725 | ||
1726 | mutex_lock(&video->device_list_lock); | |
1727 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1728 | list_del(&dev->entry); | |
1729 | kfree(dev); | |
1730 | } | |
1731 | mutex_unlock(&video->device_list_lock); | |
1732 | ||
1733 | return 0; | |
1734 | } | |
1735 | ||
ac7729da RW |
1736 | static int instance; |
1737 | ||
4be44fcd | 1738 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1739 | { |
f51e8391 | 1740 | struct acpi_video_bus *video; |
f51e8391 | 1741 | int error; |
c504f8cb ZR |
1742 | acpi_status status; |
1743 | ||
1744 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1745 | device->parent->handle, 1, | |
1746 | acpi_video_bus_match, NULL, | |
1747 | device, NULL); | |
1748 | if (status == AE_ALREADY_EXISTS) { | |
1749 | printk(KERN_WARNING FW_BUG | |
1750 | "Duplicate ACPI video bus devices for the" | |
1751 | " same VGA controller, please try module " | |
1752 | "parameter \"video.allow_duplicates=1\"" | |
1753 | "if the current driver doesn't work.\n"); | |
1754 | if (!allow_duplicates) | |
1755 | return -ENODEV; | |
1756 | } | |
1da177e4 | 1757 | |
36bcbec7 | 1758 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1759 | if (!video) |
d550d98d | 1760 | return -ENOMEM; |
1da177e4 | 1761 | |
e6d9da1d ZR |
1762 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1763 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1764 | if (instance) | |
1765 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1766 | instance++; |
e6d9da1d | 1767 | } |
f3b39f13 ZY |
1768 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1769 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1770 | if (instance) | |
1771 | device->pnp.bus_id[3] = '0' + instance; | |
1772 | instance++; | |
1773 | } | |
e6d9da1d | 1774 | |
e6afa0de | 1775 | video->device = device; |
1da177e4 LT |
1776 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1777 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1778 | device->driver_data = video; |
1da177e4 LT |
1779 | |
1780 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1781 | error = acpi_video_bus_check(video); |
1782 | if (error) | |
1783 | goto err_free_video; | |
1da177e4 | 1784 | |
bbac81f5 | 1785 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1786 | INIT_LIST_HEAD(&video->video_device_list); |
1787 | ||
ea9f8856 IM |
1788 | error = acpi_video_bus_get_devices(video, device); |
1789 | if (error) | |
91e13aa3 | 1790 | goto err_put_video; |
1da177e4 | 1791 | |
1da177e4 | 1792 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1793 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1794 | video->flags.multihead ? "yes" : "no", | |
1795 | video->flags.rom ? "yes" : "no", | |
1796 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1797 | mutex_lock(&video_list_lock); |
1798 | list_add_tail(&video->entry, &video_bus_head); | |
1799 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1800 | |
67b662e1 AL |
1801 | acpi_video_bus_register_backlight(video); |
1802 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1803 | |
f51e8391 DT |
1804 | return 0; |
1805 | ||
67b662e1 | 1806 | err_put_video: |
f51e8391 DT |
1807 | acpi_video_bus_put_devices(video); |
1808 | kfree(video->attached_array); | |
67b662e1 | 1809 | err_free_video: |
f51e8391 | 1810 | kfree(video); |
db89b4f0 | 1811 | device->driver_data = NULL; |
1da177e4 | 1812 | |
f51e8391 | 1813 | return error; |
1da177e4 LT |
1814 | } |
1815 | ||
51fac838 | 1816 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1817 | { |
4be44fcd | 1818 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1819 | |
1da177e4 LT |
1820 | |
1821 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1822 | return -EINVAL; |
1da177e4 | 1823 | |
50dd0969 | 1824 | video = acpi_driver_data(device); |
1da177e4 | 1825 | |
67b662e1 AL |
1826 | acpi_video_bus_remove_notify_handler(video); |
1827 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1828 | acpi_video_bus_put_devices(video); |
1da177e4 | 1829 | |
67b662e1 AL |
1830 | mutex_lock(&video_list_lock); |
1831 | list_del(&video->entry); | |
1832 | mutex_unlock(&video_list_lock); | |
1833 | ||
6044ec88 | 1834 | kfree(video->attached_array); |
1da177e4 LT |
1835 | kfree(video); |
1836 | ||
d550d98d | 1837 | return 0; |
1da177e4 LT |
1838 | } |
1839 | ||
c6996bdd AC |
1840 | static int __init is_i740(struct pci_dev *dev) |
1841 | { | |
1842 | if (dev->device == 0x00D1) | |
1843 | return 1; | |
1844 | if (dev->device == 0x7000) | |
1845 | return 1; | |
1846 | return 0; | |
1847 | } | |
1848 | ||
74a365b3 MG |
1849 | static int __init intel_opregion_present(void) |
1850 | { | |
c6996bdd | 1851 | int opregion = 0; |
74a365b3 MG |
1852 | struct pci_dev *dev = NULL; |
1853 | u32 address; | |
1854 | ||
1855 | for_each_pci_dev(dev) { | |
1856 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1857 | continue; | |
1858 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1859 | continue; | |
c6996bdd AC |
1860 | /* We don't want to poke around undefined i740 registers */ |
1861 | if (is_i740(dev)) | |
1862 | continue; | |
74a365b3 MG |
1863 | pci_read_config_dword(dev, 0xfc, &address); |
1864 | if (!address) | |
1865 | continue; | |
c6996bdd | 1866 | opregion = 1; |
74a365b3 | 1867 | } |
c6996bdd | 1868 | return opregion; |
74a365b3 MG |
1869 | } |
1870 | ||
8e5c2b77 | 1871 | int acpi_video_register(void) |
1da177e4 | 1872 | { |
8e5c2b77 | 1873 | int result = 0; |
86e437f0 ZY |
1874 | if (register_count) { |
1875 | /* | |
8e5c2b77 RW |
1876 | * if the function of acpi_video_register is already called, |
1877 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
1878 | */ |
1879 | return 0; | |
1880 | } | |
1da177e4 | 1881 | |
67b662e1 AL |
1882 | mutex_init(&video_list_lock); |
1883 | INIT_LIST_HEAD(&video_bus_head); | |
1884 | ||
1da177e4 | 1885 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1886 | if (result < 0) |
d550d98d | 1887 | return -ENODEV; |
1da177e4 | 1888 | |
86e437f0 ZY |
1889 | /* |
1890 | * When the acpi_video_bus is loaded successfully, increase | |
1891 | * the counter reference. | |
1892 | */ | |
1893 | register_count = 1; | |
1894 | ||
d550d98d | 1895 | return 0; |
1da177e4 | 1896 | } |
8e5c2b77 | 1897 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 1898 | |
86e437f0 ZY |
1899 | void acpi_video_unregister(void) |
1900 | { | |
1901 | if (!register_count) { | |
1902 | /* | |
1903 | * If the acpi video bus is already unloaded, don't | |
1904 | * unload it again and return directly. | |
1905 | */ | |
1906 | return; | |
1907 | } | |
1908 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1909 | ||
86e437f0 ZY |
1910 | register_count = 0; |
1911 | ||
1912 | return; | |
1913 | } | |
1914 | EXPORT_SYMBOL(acpi_video_unregister); | |
1915 | ||
74a365b3 MG |
1916 | /* |
1917 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1918 | * the video opregion code to be run first in order to initialise | |
1919 | * state before any ACPI video calls are made. To handle this we defer | |
1920 | * registration of the video class until the opregion code has run. | |
1921 | */ | |
1922 | ||
1923 | static int __init acpi_video_init(void) | |
1924 | { | |
45cb50e6 ZR |
1925 | dmi_check_system(video_dmi_table); |
1926 | ||
74a365b3 MG |
1927 | if (intel_opregion_present()) |
1928 | return 0; | |
1929 | ||
1930 | return acpi_video_register(); | |
1931 | } | |
1da177e4 | 1932 | |
86e437f0 | 1933 | static void __exit acpi_video_exit(void) |
1da177e4 | 1934 | { |
86e437f0 | 1935 | acpi_video_unregister(); |
1da177e4 | 1936 | |
d550d98d | 1937 | return; |
1da177e4 LT |
1938 | } |
1939 | ||
1940 | module_init(acpi_video_init); | |
1941 | module_exit(acpi_video_exit); |