projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Linux 3.16-rc6
[deliverable/linux.git] / drivers / acpi / video.c
CommitLineData
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 65ACPI_MODULE_NAME("video");
1da177e4 66
f52fd66d 67MODULE_AUTHOR("Bruno Ducrot");
7cda93e0 68MODULE_DESCRIPTION("ACPI Video Driver");
1da177e4
LT		 69MODULE_LICENSE("GPL");
70
2843768b 71static bool brightness_switch_enabled = 1;
8a681a4d
ZR		 72module_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 78static bool allow_duplicates;
c504f8cb
ZR		 79module_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 */
751109aa 85static int use_native_backlight_param = 1;
0e9f81d3
AL		 86module_param_named(use_native_backlight, use_native_backlight_param, int, 0444);
87static bool use_native_backlight_dmi = false;
fbc9fe1b 88
915ea7e4 89static int register_count;
67b662e1
AL		 90static struct mutex video_list_lock;
91static struct list_head video_bus_head;
4be44fcd 92static int acpi_video_bus_add(struct acpi_device *device);
51fac838 93static int acpi_video_bus_remove(struct acpi_device *device);
7015558f 94static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
1da177e4 95
1ba90e3a
TR		 96static const struct acpi_device_id video_device_ids[] = {
97 {ACPI_VIDEO_HID, 0},
98 {"", 0},
99};
100MODULE_DEVICE_TABLE(acpi, video_device_ids);
101
1da177e4 102static 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
113struct 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
120struct 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		 130struct 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
143struct 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
151struct acpi_video_bus {
e6afa0de 152 struct acpi_device *device;
99678ed7 153 bool backlight_registered;
53a92ba7 154 bool backlight_notifier_registered;
4be44fcd 155 u8 dos_setting;
1da177e4 156 struct acpi_video_enumerated_device *attached_array;
4be44fcd
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;
53a92ba7 166 struct notifier_block backlight_nb;
1da177e4
LT		 167};
168
169struct acpi_video_device_flags {
4be44fcd
LB		 170 u8 crt:1;
171 u8 lcd:1;
172 u8 tvout:1;
82cae999 173 u8 dvi:1;
4be44fcd
LB		 174 u8 bios:1;
175 u8 unknown:1;
91e13aa3
AL		 176 u8 notify:1;
177 u8 reserved:1;
1da177e4
LT		 178};
179
180struct acpi_video_device_cap {
21fcb34e
FC		 181 u8 _ADR:1; /* Return the unique ID */
182 u8 _BCL:1; /* Query list of brightness control levels supported */
183 u8 _BCM:1; /* Set the brightness level */
2f3d000a 184 u8 _BQC:1; /* Get current brightness level */
c60d638e 185 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
21fcb34e 186 u8 _DDC:1; /* Return the EDID for this device */
1da177e4
LT		 187};
188
d32f6947
ZR		 189struct acpi_video_brightness_flags {
190 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
21fcb34e 191 u8 _BCL_reversed:1; /* _BCL package is in a reversed order */
1a7c618a 192 u8 _BQC_use_index:1; /* _BQC returns an index value */
d32f6947
ZR		 193};
194
1da177e4 195struct acpi_video_device_brightness {
4be44fcd
LB		 196 int curr;
197 int count;
198 int *levels;
d32f6947 199 struct acpi_video_brightness_flags flags;
1da177e4
LT		 200};
201
202struct acpi_video_device {
4be44fcd
LB		 203 unsigned long device_id;
204 struct acpi_video_device_flags flags;
205 struct acpi_video_device_cap cap;
206 struct list_head entry;
207 struct acpi_video_bus *video;
208 struct acpi_device *dev;
1da177e4 209 struct acpi_video_device_brightness *brightness;
2f3d000a 210 struct backlight_device *backlight;
4a703a8f 211 struct thermal_cooling_device *cooling_dev;
1da177e4
LT		 212};
213
b7171ae7 214static const char device_decode[][30] = {
1da177e4
LT		 215 "motherboard VGA device",
216 "PCI VGA device",
217 "AGP VGA device",
218 "UNKNOWN",
219};
220
4be44fcd
LB		 221static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
222static void acpi_video_device_rebind(struct acpi_video_bus *video);
223static void acpi_video_device_bind(struct acpi_video_bus *video,
224 struct acpi_video_device *device);
1da177e4 225static int acpi_video_device_enumerate(struct acpi_video_bus *video);
2f3d000a
YL		 226static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
227 int level);
228static int acpi_video_device_lcd_get_level_current(
229 struct acpi_video_device *device,
a89803df 230 unsigned long long *level, bool raw);
4be44fcd
LB		 231static int acpi_video_get_next_level(struct acpi_video_device *device,
232 u32 level_current, u32 event);
c8890f90 233static int acpi_video_switch_brightness(struct acpi_video_device *device,
4be44fcd 234 int event);
1da177e4 235
0e9f81d3
AL		 236static bool acpi_video_use_native_backlight(void)
237{
238 if (use_native_backlight_param != -1)
239 return use_native_backlight_param;
240 else
241 return use_native_backlight_dmi;
242}
243
0b9f7d93 244bool acpi_video_verify_backlight_support(void)
fbc9fe1b 245{
0e9f81d3 246 if (acpi_osi_is_win8() && acpi_video_use_native_backlight() &&
fbc9fe1b
AL		 247 backlight_device_registered(BACKLIGHT_RAW))
248 return false;
249 return acpi_video_backlight_support();
250}
0b9f7d93 251EXPORT_SYMBOL_GPL(acpi_video_verify_backlight_support);
fbc9fe1b 252
21fcb34e 253/* backlight device sysfs support */
2f3d000a
YL		 254static int acpi_video_get_brightness(struct backlight_device *bd)
255{
27663c58 256 unsigned long long cur_level;
38531e6f 257 int i;
7c364e79 258 struct acpi_video_device *vd = bl_get_data(bd);
c8890f90 259
a89803df 260 if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false))
c8890f90 261 return -EINVAL;
38531e6f
MG		 262 for (i = 2; i < vd->brightness->count; i++) {
263 if (vd->brightness->levels[i] == cur_level)
21fcb34e
FC		 264 /*
265 * The first two entries are special - see page 575
266 * of the ACPI spec 3.0
267 */
915ea7e4 268 return i - 2;
38531e6f
MG		 269 }
270 return 0;
2f3d000a
YL		 271}
272
273static int acpi_video_set_brightness(struct backlight_device *bd)
274{
24450c7a 275 int request_level = bd->props.brightness + 2;
7c364e79 276 struct acpi_video_device *vd = bl_get_data(bd);
24450c7a
ZR		 277
278 return acpi_video_device_lcd_set_level(vd,
279 vd->brightness->levels[request_level]);
2f3d000a
YL		 280}
281
acc2472e 282static const struct backlight_ops acpi_backlight_ops = {
599a52d1
RP		 283 .get_brightness = acpi_video_get_brightness,
284 .update_status = acpi_video_set_brightness,
285};
286
702ed512 287/* thermal cooling device callbacks */
4a703a8f 288static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned
6503e5df 289 long *state)
702ed512 290{
4a703a8f 291 struct acpi_device *device = cooling_dev->devdata;
702ed512
ZR		 292 struct acpi_video_device *video = acpi_driver_data(device);
293
6503e5df
MG		 294 *state = video->brightness->count - 3;
295 return 0;
702ed512
ZR		 296}
297
4a703a8f 298static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned
6503e5df 299 long *state)
702ed512 300{
4a703a8f 301 struct acpi_device *device = cooling_dev->devdata;
702ed512 302 struct acpi_video_device *video = acpi_driver_data(device);
27663c58 303 unsigned long long level;
6503e5df 304 int offset;
702ed512 305
a89803df 306 if (acpi_video_device_lcd_get_level_current(video, &level, false))
c8890f90 307 return -EINVAL;
6503e5df
MG		 308 for (offset = 2; offset < video->brightness->count; offset++)
309 if (level == video->brightness->levels[offset]) {
310 *state = video->brightness->count - offset - 1;
311 return 0;
312 }
702ed512
ZR		 313
314 return -EINVAL;
315}
316
317static int
4a703a8f 318video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state)
702ed512 319{
4a703a8f 320 struct acpi_device *device = cooling_dev->devdata;
702ed512
ZR		 321 struct acpi_video_device *video = acpi_driver_data(device);
322 int level;
323
915ea7e4 324 if (state >= video->brightness->count - 2)
702ed512
ZR		 325 return -EINVAL;
326
327 state = video->brightness->count - state;
915ea7e4 328 level = video->brightness->levels[state - 1];
702ed512
ZR		 329 return acpi_video_device_lcd_set_level(video, level);
330}
331
9c8b04be 332static const struct thermal_cooling_device_ops video_cooling_ops = {
702ed512
ZR		 333 .get_max_state = video_get_max_state,
334 .get_cur_state = video_get_cur_state,
335 .set_cur_state = video_set_cur_state,
336};
337
21fcb34e
FC		 338/*
339 * --------------------------------------------------------------------------
340 * Video Management
341 * --------------------------------------------------------------------------
342 */
1da177e4 343
1da177e4 344static int
4be44fcd
LB		 345acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
346 union acpi_object **levels)
1da177e4 347{
4be44fcd
LB		 348 int status;
349 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
350 union acpi_object *obj;
1da177e4 351
1da177e4
LT		 352
353 *levels = NULL;
354
90130268 355 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
1da177e4 356 if (!ACPI_SUCCESS(status))
d550d98d 357 return status;
4be44fcd 358 obj = (union acpi_object *)buffer.pointer;
6665bda7 359 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6468463a 360 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
1da177e4
LT		 361 status = -EFAULT;
362 goto err;
363 }
364
365 *levels = obj;
366
d550d98d 367 return 0;
1da177e4 368
915ea7e4 369err:
6044ec88 370 kfree(buffer.pointer);
1da177e4 371
d550d98d 372 return status;
1da177e4
LT		 373}
374
375static int
4be44fcd 376acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
1da177e4 377{
24450c7a 378 int status;
9e6dada9 379 int state;
1da177e4 380
0db98202
JL		 381 status = acpi_execute_simple_method(device->dev->handle,
382 "_BCM", level);
24450c7a
ZR		 383 if (ACPI_FAILURE(status)) {
384 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
385 return -EIO;
386 }
387
4500ca8e 388 device->brightness->curr = level;
9e6dada9 389 for (state = 2; state < device->brightness->count; state++)
24450c7a 390 if (level == device->brightness->levels[state]) {
1a7c618a
ZR		 391 if (device->backlight)
392 device->backlight->props.brightness = state - 2;
24450c7a
ZR		 393 return 0;
394 }
9e6dada9 395
24450c7a
ZR		 396 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
397 return -EINVAL;
1da177e4
LT		 398}
399
45cb50e6
ZR		 400/*
401 * For some buggy _BQC methods, we need to add a constant value to
402 * the _BQC return value to get the actual current brightness level
403 */
404
405static int bqc_offset_aml_bug_workaround;
406static int __init video_set_bqc_offset(const struct dmi_system_id *d)
407{
408 bqc_offset_aml_bug_workaround = 9;
409 return 0;
410}
411
0e9f81d3
AL		 412static int __init video_set_use_native_backlight(const struct dmi_system_id *d)
413{
414 use_native_backlight_dmi = true;
415 return 0;
416}
417
45cb50e6
ZR		 418static struct dmi_system_id video_dmi_table[] __initdata = {
419 /*
420 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
421 */
422 {
423 .callback = video_set_bqc_offset,
424 .ident = "Acer Aspire 5720",
425 .matches = {
426 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
427 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
428 },
429 },
5afc4abe
LB		 430 {
431 .callback = video_set_bqc_offset,
432 .ident = "Acer Aspire 5710Z",
433 .matches = {
434 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
435 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
436 },
437 },
34ac272b
ZR		 438 {
439 .callback = video_set_bqc_offset,
440 .ident = "eMachines E510",
441 .matches = {
442 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
443 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
444 },
445 },
93bcece2
ZR		 446 {
447 .callback = video_set_bqc_offset,
448 .ident = "Acer Aspire 5315",
449 .matches = {
450 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
451 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
452 },
453 },
152a4e63
ZR		 454 {
455 .callback = video_set_bqc_offset,
456 .ident = "Acer Aspire 7720",
457 .matches = {
458 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
459 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
460 },
461 },
0e9f81d3
AL		 462 {
463 .callback = video_set_use_native_backlight,
43d94902 464 .ident = "ThinkPad T430 and T430s",
0e9f81d3
AL		 465 .matches = {
466 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
43d94902 467 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430"),
0e9f81d3
AL		 468 },
469 },
470 {
471 .callback = video_set_use_native_backlight,
472 .ident = "ThinkPad X230",
473 .matches = {
474 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
475 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"),
476 },
477 },
1e815db6
HG		 478 {
479 .callback = video_set_use_native_backlight,
480 .ident = "ThinkPad W530",
481 .matches = {
482 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
483 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W530"),
484 },
485 },
43d94902
HG		 486 {
487 .callback = video_set_use_native_backlight,
0e9f81d3
AL		 488 .ident = "ThinkPad X1 Carbon",
489 .matches = {
490 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
491 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"),
492 },
493 },
494 {
495 .callback = video_set_use_native_backlight,
496 .ident = "Lenovo Yoga 13",
497 .matches = {
498 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
499 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"),
500 },
501 },
0dc6b96a
HG		 502 {
503 .callback = video_set_use_native_backlight,
504 .ident = "Lenovo Yoga 2 11",
505 .matches = {
506 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
507 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2 11"),
508 },
509 },
997dd7fe
SCP		 510 {
511 .callback = video_set_use_native_backlight,
512 .ident = "Thinkpad Helix",
513 .matches = {
514 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
515 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"),
516 },
517 },
0e9f81d3
AL		 518 {
519 .callback = video_set_use_native_backlight,
520 .ident = "Dell Inspiron 7520",
521 .matches = {
522 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
5ff365fb 523 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
0e9f81d3
AL		 524 },
525 },
526 {
527 .callback = video_set_use_native_backlight,
528 .ident = "Acer Aspire 5733Z",
529 .matches = {
530 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
531 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5733Z"),
532 },
533 },
43d94902
HG		 534 {
535 .callback = video_set_use_native_backlight,
536 .ident = "Acer Aspire 5742G",
537 .matches = {
538 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
539 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5742G"),
540 },
541 },
0dc6b96a
HG		 542 {
543 .callback = video_set_use_native_backlight,
544 .ident = "Acer Aspire V5-171",
545 .matches = {
546 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
547 DMI_MATCH(DMI_PRODUCT_NAME, "V5-171"),
548 },
549 },
0e9f81d3
AL		 550 {
551 .callback = video_set_use_native_backlight,
552 .ident = "Acer Aspire V5-431",
553 .matches = {
554 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
555 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-431"),
556 },
557 },
0dc6b96a
HG		 558 {
559 .callback = video_set_use_native_backlight,
560 .ident = "Acer Aspire V5-471G",
561 .matches = {
562 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
563 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-471G"),
564 },
565 },
ab7027de
MK		 566 {
567 .callback = video_set_use_native_backlight,
568 .ident = "Acer TravelMate B113",
569 .matches = {
570 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
571 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate B113"),
572 },
573 },
0e9f81d3
AL		 574 {
575 .callback = video_set_use_native_backlight,
576 .ident = "HP ProBook 4340s",
577 .matches = {
578 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
579 DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4340s"),
580 },
581 },
582 {
583 .callback = video_set_use_native_backlight,
4cf465b5
HG		 584 .ident = "HP ProBook 4540s",
585 .matches = {
586 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
587 DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4540s"),
588 },
589 },
590 {
591 .callback = video_set_use_native_backlight,
0e9f81d3
AL		 592 .ident = "HP ProBook 2013 models",
593 .matches = {
594 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
595 DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook "),
596 DMI_MATCH(DMI_PRODUCT_NAME, " G1"),
597 },
598 },
599 {
600 .callback = video_set_use_native_backlight,
601 .ident = "HP EliteBook 2013 models",
602 .matches = {
603 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
604 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "),
605 DMI_MATCH(DMI_PRODUCT_NAME, " G1"),
606 },
607 },
608 {
609 .callback = video_set_use_native_backlight,
610 .ident = "HP ZBook 14",
611 .matches = {
612 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
613 DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 14"),
614 },
615 },
616 {
617 .callback = video_set_use_native_backlight,
618 .ident = "HP ZBook 15",
619 .matches = {
620 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
621 DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 15"),
622 },
623 },
624 {
625 .callback = video_set_use_native_backlight,
626 .ident = "HP ZBook 17",
627 .matches = {
628 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
629 DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 17"),
630 },
631 },
632 {
633 .callback = video_set_use_native_backlight,
0dc6b96a
HG		 634 .ident = "HP EliteBook 8470p",
635 .matches = {
636 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
637 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8470p"),
638 },
639 },
640 {
641 .callback = video_set_use_native_backlight,
0e9f81d3
AL		 642 .ident = "HP EliteBook 8780w",
643 .matches = {
644 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
645 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"),
646 },
647 },
45cb50e6
ZR		 648 {}
649};
650
994fa63c
DB		 651static unsigned long long
652acpi_video_bqc_value_to_level(struct acpi_video_device *device,
653 unsigned long long bqc_value)
654{
655 unsigned long long level;
656
657 if (device->brightness->flags._BQC_use_index) {
658 /*
659 * _BQC returns an index that doesn't account for
660 * the first 2 items with special meaning, so we need
661 * to compensate for that by offsetting ourselves
662 */
663 if (device->brightness->flags._BCL_reversed)
664 bqc_value = device->brightness->count - 3 - bqc_value;
665
666 level = device->brightness->levels[bqc_value + 2];
667 } else {
668 level = bqc_value;
669 }
670
671 level += bqc_offset_aml_bug_workaround;
672
673 return level;
674}
675
1da177e4 676static int
4be44fcd 677acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
a89803df 678 unsigned long long *level, bool raw)
1da177e4 679{
c8890f90 680 acpi_status status = AE_OK;
4e231fa4 681 int i;
c8890f90 682
c60d638e
ZR		 683 if (device->cap._BQC || device->cap._BCQ) {
684 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
685
686 status = acpi_evaluate_integer(device->dev->handle, buf,
c8890f90
ZR		 687 NULL, level);
688 if (ACPI_SUCCESS(status)) {
a89803df
DB		 689 if (raw) {
690 /*
691 * Caller has indicated he wants the raw
692 * value returned by _BQC, so don't furtherly
693 * mess with the value.
694 */
695 return 0;
696 }
697
994fa63c 698 *level = acpi_video_bqc_value_to_level(device, *level);
1a7c618a 699
4e231fa4
VS		 700 for (i = 2; i < device->brightness->count; i++)
701 if (device->brightness->levels[i] == *level) {
702 device->brightness->curr = *level;
703 return 0;
915ea7e4 704 }
a89803df
DB		 705 /*
706 * BQC returned an invalid level.
707 * Stop using it.
708 */
709 ACPI_WARNING((AE_INFO,
710 "%s returned an invalid level",
711 buf));
712 device->cap._BQC = device->cap._BCQ = 0;
c8890f90 713 } else {
21fcb34e
FC		 714 /*
715 * Fixme:
c8890f90
ZR		 716 * should we return an error or ignore this failure?
717 * dev->brightness->curr is a cached value which stores
718 * the correct current backlight level in most cases.
719 * ACPI video backlight still works w/ buggy _BQC.
720 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
721 */
c60d638e
ZR		 722 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
723 device->cap._BQC = device->cap._BCQ = 0;
c8890f90
ZR		 724 }
725 }
726
4500ca8e 727 *level = device->brightness->curr;
c8890f90 728 return 0;
1da177e4
LT		 729}
730
731static int
4be44fcd
LB		 732acpi_video_device_EDID(struct acpi_video_device *device,
733 union acpi_object **edid, ssize_t length)
1da177e4 734{
4be44fcd
LB		 735 int status;
736 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
737 union acpi_object *obj;
738 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
739 struct acpi_object_list args = { 1, &arg0 };
1da177e4 740
1da177e4
LT		 741
742 *edid = NULL;
743
744 if (!device)
d550d98d 745 return -ENODEV;
1da177e4
LT		 746 if (length == 128)
747 arg0.integer.value = 1;
748 else if (length == 256)
749 arg0.integer.value = 2;
750 else
d550d98d 751 return -EINVAL;
1da177e4 752
90130268 753 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
1da177e4 754 if (ACPI_FAILURE(status))
d550d98d 755 return -ENODEV;
1da177e4 756
50dd0969 757 obj = buffer.pointer;
1da177e4
LT		 758
759 if (obj && obj->type == ACPI_TYPE_BUFFER)
760 *edid = obj;
761 else {
6468463a 762 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
1da177e4
LT		 763 status = -EFAULT;
764 kfree(obj);
765 }
766
d550d98d 767 return status;
1da177e4
LT		 768}
769
1da177e4
LT		 770/* bus */
771
1da177e4
LT		 772/*
773 * Arg:
21fcb34e
FC		 774 * video : video bus device pointer
775 * bios_flag :
1da177e4
LT		 776 * 0. The system BIOS should NOT automatically switch(toggle)
777 * the active display output.
778 * 1. The system BIOS should automatically switch (toggle) the
98fb8fe1 779 * active display output. No switch event.
1da177e4
LT		 780 * 2. The _DGS value should be locked.
781 * 3. The system BIOS should not automatically switch (toggle) the
782 * active display output, but instead generate the display switch
783 * event notify code.
784 * lcd_flag :
785 * 0. The system BIOS should automatically control the brightness level
98fb8fe1 786 * of the LCD when the power changes from AC to DC
21fcb34e 787 * 1. The system BIOS should NOT automatically control the brightness
98fb8fe1 788 * level of the LCD when the power changes from AC to DC.
21fcb34e 789 * Return Value:
ea9f8856 790 * -EINVAL wrong arg.
1da177e4
LT		 791 */
792
793static int
4be44fcd 794acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
1da177e4 795{
ea9f8856 796 acpi_status status;
1da177e4 797
b0373843
ZR		 798 if (!video->cap._DOS)
799 return 0;
1da177e4 800
ea9f8856
IM		 801 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1)
802 return -EINVAL;
0db98202
JL		 803 video->dos_setting = (lcd_flag << 2) | bios_flag;
804 status = acpi_execute_simple_method(video->device->handle, "_DOS",
805 (lcd_flag << 2) | bios_flag);
ea9f8856
IM		 806 if (ACPI_FAILURE(status))
807 return -EIO;
1da177e4 808
ea9f8856 809 return 0;
1da177e4
LT		 810}
811
935e5f29
ZR		 812/*
813 * Simple comparison function used to sort backlight levels.
814 */
815
816static int
817acpi_video_cmp_level(const void *a, const void *b)
818{
819 return *(int *)a - *(int *)b;
820}
821
a50188da
AL		 822/*
823 * Decides if _BQC/_BCQ for this system is usable
824 *
825 * We do this by changing the level first and then read out the current
826 * brightness level, if the value does not match, find out if it is using
827 * index. If not, clear the _BQC/_BCQ capability.
828 */
829static int acpi_video_bqc_quirk(struct acpi_video_device *device,
830 int max_level, int current_level)
831{
832 struct acpi_video_device_brightness *br = device->brightness;
833 int result;
834 unsigned long long level;
835 int test_level;
836
837 /* don't mess with existing known broken systems */
838 if (bqc_offset_aml_bug_workaround)
839 return 0;
840
841 /*
842 * Some systems always report current brightness level as maximum
843 * through _BQC, we need to test another value for them.
844 */
b3b301c5 845 test_level = current_level == max_level ? br->levels[3] : max_level;
a50188da
AL		 846
847 result = acpi_video_device_lcd_set_level(device, test_level);
848 if (result)
849 return result;
850
851 result = acpi_video_device_lcd_get_level_current(device, &level, true);
852 if (result)
853 return result;
854
855 if (level != test_level) {
856 /* buggy _BQC found, need to find out if it uses index */
857 if (level < br->count) {
858 if (br->flags._BCL_reversed)
859 level = br->count - 3 - level;
860 if (br->levels[level + 2] == test_level)
861 br->flags._BQC_use_index = 1;
862 }
863
864 if (!br->flags._BQC_use_index)
865 device->cap._BQC = device->cap._BCQ = 0;
866 }
867
868 return 0;
869}
870
871
1da177e4 872/*
21fcb34e
FC		 873 * Arg:
874 * device : video output device (LCD, CRT, ..)
1da177e4
LT		 875 *
876 * Return Value:
469778c1
JJ		 877 * Maximum brightness level
878 *
879 * Allocate and initialize device->brightness.
880 */
881
882static int
883acpi_video_init_brightness(struct acpi_video_device *device)
884{
885 union acpi_object *obj = NULL;
d32f6947 886 int i, max_level = 0, count = 0, level_ac_battery = 0;
1a7c618a 887 unsigned long long level, level_old;
469778c1
JJ		 888 union acpi_object *o;
889 struct acpi_video_device_brightness *br = NULL;
1a7c618a 890 int result = -EINVAL;
bd8ba205 891 u32 value;
469778c1
JJ		 892
893 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
894 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
895 "LCD brightness level\n"));
896 goto out;
897 }
898
899 if (obj->package.count < 2)
900 goto out;
901
902 br = kzalloc(sizeof(*br), GFP_KERNEL);
903 if (!br) {
904 printk(KERN_ERR "can't allocate memory\n");
1a7c618a 905 result = -ENOMEM;
469778c1
JJ		 906 goto out;
907 }
908
d32f6947 909 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
469778c1 910 GFP_KERNEL);
1a7c618a
ZR		 911 if (!br->levels) {
912 result = -ENOMEM;
469778c1 913 goto out_free;
1a7c618a 914 }
469778c1
JJ		 915
916 for (i = 0; i < obj->package.count; i++) {
917 o = (union acpi_object *)&obj->package.elements[i];
918 if (o->type != ACPI_TYPE_INTEGER) {
919 printk(KERN_ERR PREFIX "Invalid data\n");
920 continue;
921 }
bd8ba205
HG		 922 value = (u32) o->integer.value;
923 /* Skip duplicate entries */
924 if (count > 2 && br->levels[count - 1] == value)
925 continue;
926
927 br->levels[count] = value;
469778c1
JJ		 928
929 if (br->levels[count] > max_level)
930 max_level = br->levels[count];
931 count++;
932 }
933
d32f6947
ZR		 934 /*
935 * some buggy BIOS don't export the levels
936 * when machine is on AC/Battery in _BCL package.
937 * In this case, the first two elements in _BCL packages
938 * are also supported brightness levels that OS should take care of.
939 */
90af2cf6
ZR		 940 for (i = 2; i < count; i++) {
941 if (br->levels[i] == br->levels[0])
d32f6947 942 level_ac_battery++;
90af2cf6
ZR		 943 if (br->levels[i] == br->levels[1])
944 level_ac_battery++;
945 }
d32f6947
ZR		 946
947 if (level_ac_battery < 2) {
948 level_ac_battery = 2 - level_ac_battery;
949 br->flags._BCL_no_ac_battery_levels = 1;
950 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
951 br->levels[i] = br->levels[i - level_ac_battery];
952 count += level_ac_battery;
953 } else if (level_ac_battery > 2)
bf6787eb 954 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package"));
d32f6947 955
d80fb99f
ZR		 956 /* Check if the _BCL package is in a reversed order */
957 if (max_level == br->levels[2]) {
958 br->flags._BCL_reversed = 1;
959 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
960 acpi_video_cmp_level, NULL);
961 } else if (max_level != br->levels[count - 1])
962 ACPI_ERROR((AE_INFO,
bf6787eb 963 "Found unordered _BCL package"));
469778c1
JJ		 964
965 br->count = count;
966 device->brightness = br;
1a7c618a 967
1a7c618a 968 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
90c53ca4 969 br->curr = level = max_level;
e047cca6
ZR		 970
971 if (!device->cap._BQC)
972 goto set_level;
973
a89803df
DB		 974 result = acpi_video_device_lcd_get_level_current(device,
975 &level_old, true);
1a7c618a
ZR		 976 if (result)
977 goto out_free_levels;
978
a50188da 979 result = acpi_video_bqc_quirk(device, max_level, level_old);
1a7c618a
ZR		 980 if (result)
981 goto out_free_levels;
a50188da
AL		 982 /*
983 * cap._BQC may get cleared due to _BQC is found to be broken
984 * in acpi_video_bqc_quirk, so check again here.
985 */
986 if (!device->cap._BQC)
987 goto set_level;
e047cca6 988
545ef368
AL		 989 level = acpi_video_bqc_value_to_level(device, level_old);
990 /*
991 * On some buggy laptops, _BQC returns an uninitialized
992 * value when invoked for the first time, i.e.
993 * level_old is invalid (no matter whether it's a level
994 * or an index). Set the backlight to max_level in this case.
995 */
996 for (i = 2; i < br->count; i++)
997 if (level == br->levels[i])
998 break;
999 if (i == br->count || !level)
1000 level = max_level;
e047cca6 1001
e047cca6 1002set_level:
90c53ca4 1003 result = acpi_video_device_lcd_set_level(device, level);
e047cca6
ZR		 1004 if (result)
1005 goto out_free_levels;
1a7c618a 1006
d32f6947
ZR		 1007 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1008 "found %d brightness levels\n", count - 2));
469778c1 1009 kfree(obj);
1a7c618a 1010 return result;
469778c1
JJ		 1011
1012out_free_levels:
1013 kfree(br->levels);
1014out_free:
1015 kfree(br);
1016out:
1017 device->brightness = NULL;
1018 kfree(obj);
1a7c618a 1019 return result;
469778c1
JJ		 1020}
1021
1022/*
1023 * Arg:
1024 * device : video output device (LCD, CRT, ..)
1025 *
1026 * Return Value:
21fcb34e 1027 * None
1da177e4 1028 *
98fb8fe1 1029 * Find out all required AML methods defined under the output
1da177e4
LT		 1030 * device.
1031 */
1032
4be44fcd 1033static void acpi_video_device_find_cap(struct acpi_video_device *device)
1da177e4 1034{
952c63e9 1035 if (acpi_has_method(device->dev->handle, "_ADR"))
1da177e4 1036 device->cap._ADR = 1;
952c63e9 1037 if (acpi_has_method(device->dev->handle, "_BCL"))
4be44fcd 1038 device->cap._BCL = 1;
952c63e9 1039 if (acpi_has_method(device->dev->handle, "_BCM"))
4be44fcd 1040 device->cap._BCM = 1;
952c63e9 1041 if (acpi_has_method(device->dev->handle, "_BQC")) {
2f3d000a 1042 device->cap._BQC = 1;
952c63e9 1043 } else if (acpi_has_method(device->dev->handle, "_BCQ")) {
c60d638e
ZR		 1044 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
1045 device->cap._BCQ = 1;
1046 }
1047
952c63e9 1048 if (acpi_has_method(device->dev->handle, "_DDC"))
4be44fcd 1049 device->cap._DDC = 1;
1da177e4
LT		 1050}
1051
1052/*
21fcb34e
FC		 1053 * Arg:
1054 * device : video output device (VGA)
1da177e4
LT		 1055 *
1056 * Return Value:
21fcb34e 1057 * None
1da177e4 1058 *
98fb8fe1 1059 * Find out all required AML methods defined under the video bus device.
1da177e4
LT		 1060 */
1061
4be44fcd 1062static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1da177e4 1063{
952c63e9 1064 if (acpi_has_method(video->device->handle, "_DOS"))
1da177e4 1065 video->cap._DOS = 1;
952c63e9 1066 if (acpi_has_method(video->device->handle, "_DOD"))
1da177e4 1067 video->cap._DOD = 1;
952c63e9 1068 if (acpi_has_method(video->device->handle, "_ROM"))
1da177e4 1069 video->cap._ROM = 1;
952c63e9 1070 if (acpi_has_method(video->device->handle, "_GPD"))
1da177e4 1071 video->cap._GPD = 1;
952c63e9 1072 if (acpi_has_method(video->device->handle, "_SPD"))
1da177e4 1073 video->cap._SPD = 1;
952c63e9 1074 if (acpi_has_method(video->device->handle, "_VPO"))
1da177e4 1075 video->cap._VPO = 1;
1da177e4
LT		 1076}
1077
1078/*
1079 * Check whether the video bus device has required AML method to
1080 * support the desired features
1081 */
1082
4be44fcd 1083static int acpi_video_bus_check(struct acpi_video_bus *video)
1da177e4 1084{
4be44fcd 1085 acpi_status status = -ENOENT;
1e4cffe7 1086 struct pci_dev *dev;
1da177e4
LT		 1087
1088 if (!video)
d550d98d 1089 return -EINVAL;
1da177e4 1090
1e4cffe7 1091 dev = acpi_get_pci_dev(video->device->handle);
22c13f9d
TR		 1092 if (!dev)
1093 return -ENODEV;
1e4cffe7 1094 pci_dev_put(dev);
22c13f9d 1095
21fcb34e
FC		 1096 /*
1097 * Since there is no HID, CID and so on for VGA driver, we have
1da177e4
LT		 1098 * to check well known required nodes.
1099 */
1100
98fb8fe1 1101 /* Does this device support video switching? */
3a1151e3
SB		 1102 if (video->cap._DOS || video->cap._DOD) {
1103 if (!video->cap._DOS) {
1104 printk(KERN_WARNING FW_BUG
1105 "ACPI(%s) defines _DOD but not _DOS\n",
1106 acpi_device_bid(video->device));
1107 }
1da177e4
LT		 1108 video->flags.multihead = 1;
1109 status = 0;
1110 }
1111
98fb8fe1 1112 /* Does this device support retrieving a video ROM? */
4be44fcd 1113 if (video->cap._ROM) {
1da177e4
LT		 1114 video->flags.rom = 1;
1115 status = 0;
1116 }
1117
98fb8fe1 1118 /* Does this device support configuring which video device to POST? */
4be44fcd 1119 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1da177e4
LT		 1120 video->flags.post = 1;
1121 status = 0;
1122 }
1123
d550d98d 1124 return status;
1da177e4
LT		 1125}
1126
21fcb34e
FC		 1127/*
1128 * --------------------------------------------------------------------------
1129 * Driver Interface
1130 * --------------------------------------------------------------------------
1131 */
1da177e4
LT		 1132
1133/* device interface */
915ea7e4 1134static struct acpi_video_device_attrib *
82cae999
RZ		 1135acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1136{
78eed028
DT		 1137 struct acpi_video_enumerated_device *ids;
1138 int i;
1139
1140 for (i = 0; i < video->attached_count; i++) {
1141 ids = &video->attached_array[i];
1142 if ((ids->value.int_val & 0xffff) == device_id)
1143 return &ids->value.attrib;
1144 }
82cae999 1145
82cae999
RZ		 1146 return NULL;
1147}
1da177e4 1148
e92a7162
MG		 1149static int
1150acpi_video_get_device_type(struct acpi_video_bus *video,
1151 unsigned long device_id)
1152{
1153 struct acpi_video_enumerated_device *ids;
1154 int i;
1155
1156 for (i = 0; i < video->attached_count; i++) {
1157 ids = &video->attached_array[i];
1158 if ((ids->value.int_val & 0xffff) == device_id)
1159 return ids->value.int_val;
1160 }
1161
1162 return 0;
1163}
1164
1da177e4 1165static int
4be44fcd
LB		 1166acpi_video_bus_get_one_device(struct acpi_device *device,
1167 struct acpi_video_bus *video)
1da177e4 1168{
27663c58 1169 unsigned long long device_id;
e92a7162 1170 int status, device_type;
4be44fcd 1171 struct acpi_video_device *data;
915ea7e4 1172 struct acpi_video_device_attrib *attribute;
1da177e4 1173
4be44fcd
LB		 1174 status =
1175 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
91e13aa3
AL		 1176 /* Some device omits _ADR, we skip them instead of fail */
1177 if (ACPI_FAILURE(status))
1178 return 0;
1da177e4 1179
91e13aa3
AL		 1180 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1181 if (!data)
1182 return -ENOMEM;
82cae999 1183
91e13aa3
AL		 1184 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1185 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1186 device->driver_data = data;
1187
1188 data->device_id = device_id;
1189 data->video = video;
1190 data->dev = device;
1191
1192 attribute = acpi_video_get_device_attr(video, device_id);
1193
915ea7e4 1194 if (attribute && attribute->device_id_scheme) {
91e13aa3
AL		 1195 switch (attribute->display_type) {
1196 case ACPI_VIDEO_DISPLAY_CRT:
1197 data->flags.crt = 1;
1198 break;
1199 case ACPI_VIDEO_DISPLAY_TV:
1200 data->flags.tvout = 1;
1201 break;
1202 case ACPI_VIDEO_DISPLAY_DVI:
1203 data->flags.dvi = 1;
1204 break;
1205 case ACPI_VIDEO_DISPLAY_LCD:
1206 data->flags.lcd = 1;
1207 break;
1208 default:
1209 data->flags.unknown = 1;
1210 break;
1211 }
915ea7e4 1212 if (attribute->bios_can_detect)
91e13aa3
AL		 1213 data->flags.bios = 1;
1214 } else {
1215 /* Check for legacy IDs */
1216 device_type = acpi_video_get_device_type(video, device_id);
1217 /* Ignore bits 16 and 18-20 */
1218 switch (device_type & 0xffe2ffff) {
915ea7e4
FC		 1219 case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR:
1220 data->flags.crt = 1;
1221 break;
1222 case ACPI_VIDEO_DISPLAY_LEGACY_PANEL:
1223 data->flags.lcd = 1;
1224 break;
1225 case ACPI_VIDEO_DISPLAY_LEGACY_TV:
1226 data->flags.tvout = 1;
1227 break;
1228 default:
1229 data->flags.unknown = 1;
e92a7162 1230 }
91e13aa3 1231 }
4be44fcd 1232
91e13aa3
AL		 1233 acpi_video_device_bind(video, data);
1234 acpi_video_device_find_cap(data);
1da177e4 1235
91e13aa3
AL		 1236 mutex_lock(&video->device_list_lock);
1237 list_add_tail(&data->entry, &video->video_device_list);
1238 mutex_unlock(&video->device_list_lock);
1da177e4 1239
91e13aa3 1240 return status;
1da177e4
LT		 1241}
1242
1243/*
1244 * Arg:
21fcb34e 1245 * video : video bus device
1da177e4
LT		 1246 *
1247 * Return:
21fcb34e
FC		 1248 * none
1249 *
1250 * Enumerate the video device list of the video bus,
1da177e4
LT		 1251 * bind the ids with the corresponding video devices
1252 * under the video bus.
4be44fcd 1253 */
1da177e4 1254
4be44fcd 1255static void acpi_video_device_rebind(struct acpi_video_bus *video)
1da177e4 1256{
ff102ea9
DT		 1257 struct acpi_video_device *dev;
1258
bbac81f5 1259 mutex_lock(&video->device_list_lock);
ff102ea9
DT		 1260
1261 list_for_each_entry(dev, &video->video_device_list, entry)
4be44fcd 1262 acpi_video_device_bind(video, dev);
ff102ea9 1263
bbac81f5 1264 mutex_unlock(&video->device_list_lock);
1da177e4
LT		 1265}
1266
1267/*
1268 * Arg:
21fcb34e
FC		 1269 * video : video bus device
1270 * device : video output device under the video
1271 * bus
1da177e4
LT		 1272 *
1273 * Return:
21fcb34e
FC		 1274 * none
1275 *
1da177e4
LT		 1276 * Bind the ids with the corresponding video devices
1277 * under the video bus.
4be44fcd 1278 */
1da177e4
LT		 1279
1280static void
4be44fcd
LB		 1281acpi_video_device_bind(struct acpi_video_bus *video,
1282 struct acpi_video_device *device)
1da177e4 1283{
78eed028 1284 struct acpi_video_enumerated_device *ids;
4be44fcd 1285 int i;
1da177e4 1286
78eed028
DT		 1287 for (i = 0; i < video->attached_count; i++) {
1288 ids = &video->attached_array[i];
1289 if (device->device_id == (ids->value.int_val & 0xffff)) {
1290 ids->bind_info = device;
1da177e4
LT		 1291 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1292 }
1293 }
1da177e4
LT		 1294}
1295
1296/*
1297 * Arg:
21fcb34e 1298 * video : video bus device
1da177e4
LT		 1299 *
1300 * Return:
21fcb34e
FC		 1301 * < 0 : error
1302 *
1da177e4
LT		 1303 * Call _DOD to enumerate all devices attached to display adapter
1304 *
4be44fcd 1305 */
1da177e4
LT		 1306
1307static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1308{
4be44fcd
LB		 1309 int status;
1310 int count;
1311 int i;
78eed028 1312 struct acpi_video_enumerated_device *active_list;
4be44fcd
LB		 1313 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1314 union acpi_object *dod = NULL;
1315 union acpi_object *obj;
1da177e4 1316
90130268 1317 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1da177e4 1318 if (!ACPI_SUCCESS(status)) {
a6fc6720 1319 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
d550d98d 1320 return status;
1da177e4
LT		 1321 }
1322
50dd0969 1323 dod = buffer.pointer;
1da177e4 1324 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
a6fc6720 1325 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1da177e4
LT		 1326 status = -EFAULT;
1327 goto out;
1328 }
1329
1330 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
4be44fcd 1331 dod->package.count));
1da177e4 1332
78eed028
DT		 1333 active_list = kcalloc(1 + dod->package.count,
1334 sizeof(struct acpi_video_enumerated_device),
1335 GFP_KERNEL);
1336 if (!active_list) {
1da177e4
LT		 1337 status = -ENOMEM;
1338 goto out;
1339 }
1340
1341 count = 0;
1342 for (i = 0; i < dod->package.count; i++) {
50dd0969 1343 obj = &dod->package.elements[i];
1da177e4
LT		 1344
1345 if (obj->type != ACPI_TYPE_INTEGER) {
78eed028
DT		 1346 printk(KERN_ERR PREFIX
1347 "Invalid _DOD data in element %d\n", i);
1348 continue;
1da177e4 1349 }
78eed028
DT		 1350
1351 active_list[count].value.int_val = obj->integer.value;
1352 active_list[count].bind_info = NULL;
4be44fcd
LB		 1353 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1354 (int)obj->integer.value));
1da177e4
LT		 1355 count++;
1356 }
1da177e4 1357
6044ec88 1358 kfree(video->attached_array);
4be44fcd 1359
78eed028 1360 video->attached_array = active_list;
1da177e4 1361 video->attached_count = count;
78eed028 1362
915ea7e4 1363out:
02438d87 1364 kfree(buffer.pointer);
d550d98d 1365 return status;
1da177e4
LT		 1366}
1367
4be44fcd
LB		 1368static int
1369acpi_video_get_next_level(struct acpi_video_device *device,
1370 u32 level_current, u32 event)
1da177e4 1371{
63f0edfc 1372 int min, max, min_above, max_below, i, l, delta = 255;
f4715189
TT		 1373 max = max_below = 0;
1374 min = min_above = 255;
63f0edfc 1375 /* Find closest level to level_current */
0a3db1ce 1376 for (i = 2; i < device->brightness->count; i++) {
63f0edfc
AS		 1377 l = device->brightness->levels[i];
1378 if (abs(l - level_current) < abs(delta)) {
1379 delta = l - level_current;
1380 if (!delta)
1381 break;
1382 }
1383 }
1384 /* Ajust level_current to closest available level */
1385 level_current += delta;
0a3db1ce 1386 for (i = 2; i < device->brightness->count; i++) {
f4715189
TT		 1387 l = device->brightness->levels[i];
1388 if (l < min)
1389 min = l;
1390 if (l > max)
1391 max = l;
1392 if (l < min_above && l > level_current)
1393 min_above = l;
1394 if (l > max_below && l < level_current)
1395 max_below = l;
1396 }
1397
1398 switch (event) {
1399 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1400 return (level_current < max) ? min_above : min;
1401 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1402 return (level_current < max) ? min_above : max;
1403 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1404 return (level_current > min) ? max_below : min;
1405 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1406 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1407 return 0;
1408 default:
1409 return level_current;
1410 }
1da177e4
LT		 1411}
1412
c8890f90 1413static int
4be44fcd 1414acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1da177e4 1415{
27663c58 1416 unsigned long long level_current, level_next;
c8890f90
ZR		 1417 int result = -EINVAL;
1418
fbc9fe1b
AL		 1419 /* no warning message if acpi_backlight=vendor or a quirk is used */
1420 if (!acpi_video_verify_backlight_support())
28c32e99
ZR		 1421 return 0;
1422
469778c1 1423 if (!device->brightness)
c8890f90
ZR		 1424 goto out;
1425
1426 result = acpi_video_device_lcd_get_level_current(device,
a89803df
DB		 1427 &level_current,
1428 false);
c8890f90
ZR		 1429 if (result)
1430 goto out;
1431
1da177e4 1432 level_next = acpi_video_get_next_level(device, level_current, event);
c8890f90 1433
24450c7a 1434 result = acpi_video_device_lcd_set_level(device, level_next);
c8890f90 1435
36342742
MG		 1436 if (!result)
1437 backlight_force_update(device->backlight,
1438 BACKLIGHT_UPDATE_HOTKEY);
1439
c8890f90
ZR		 1440out:
1441 if (result)
1442 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1443
1444 return result;
1da177e4
LT		 1445}
1446
e92a7162
MG		 1447int acpi_video_get_edid(struct acpi_device *device, int type, int device_id,
1448 void **edid)
1449{
1450 struct acpi_video_bus *video;
1451 struct acpi_video_device *video_device;
1452 union acpi_object *buffer = NULL;
1453 acpi_status status;
1454 int i, length;
1455
1456 if (!device || !acpi_driver_data(device))
1457 return -EINVAL;
1458
1459 video = acpi_driver_data(device);
1460
1461 for (i = 0; i < video->attached_count; i++) {
1462 video_device = video->attached_array[i].bind_info;
1463 length = 256;
1464
1465 if (!video_device)
1466 continue;
1467
82069552
ZR		 1468 if (!video_device->cap._DDC)
1469 continue;
1470
e92a7162
MG		 1471 if (type) {
1472 switch (type) {
1473 case ACPI_VIDEO_DISPLAY_CRT:
1474 if (!video_device->flags.crt)
1475 continue;
1476 break;
1477 case ACPI_VIDEO_DISPLAY_TV:
1478 if (!video_device->flags.tvout)
1479 continue;
1480 break;
1481 case ACPI_VIDEO_DISPLAY_DVI:
1482 if (!video_device->flags.dvi)
1483 continue;
1484 break;
1485 case ACPI_VIDEO_DISPLAY_LCD:
1486 if (!video_device->flags.lcd)
1487 continue;
1488 break;
1489 }
1490 } else if (video_device->device_id != device_id) {
1491 continue;
1492 }
1493
1494 status = acpi_video_device_EDID(video_device, &buffer, length);
1495
1496 if (ACPI_FAILURE(status) || !buffer ||
1497 buffer->type != ACPI_TYPE_BUFFER) {
1498 length = 128;
1499 status = acpi_video_device_EDID(video_device, &buffer,
1500 length);
1501 if (ACPI_FAILURE(status) || !buffer ||
1502 buffer->type != ACPI_TYPE_BUFFER) {
1503 continue;
1504 }
1505 }
1506
1507 *edid = buffer->buffer.pointer;
1508 return length;
1509 }
1510
1511 return -ENODEV;
1512}
1513EXPORT_SYMBOL(acpi_video_get_edid);
1514
1da177e4 1515static int
4be44fcd
LB		 1516acpi_video_bus_get_devices(struct acpi_video_bus *video,
1517 struct acpi_device *device)
1da177e4 1518{
fba4e087 1519 int status = 0;
ff102ea9 1520 struct acpi_device *dev;
1da177e4 1521
fba4e087
IM		 1522 /*
1523 * There are systems where video module known to work fine regardless
1524 * of broken _DOD and ignoring returned value here doesn't cause
1525 * any issues later.
1526 */
1527 acpi_video_device_enumerate(video);
1da177e4 1528
ff102ea9 1529 list_for_each_entry(dev, &device->children, node) {
1da177e4
LT		 1530
1531 status = acpi_video_bus_get_one_device(dev, video);
ea9f8856 1532 if (status) {
91e13aa3
AL		 1533 dev_err(&dev->dev, "Can't attach device\n");
1534 break;
1da177e4 1535 }
1da177e4 1536 }
d550d98d 1537 return status;
1da177e4
LT		 1538}
1539
1da177e4
LT		 1540/* acpi_video interface */
1541
efaa14c7
AL		 1542/*
1543 * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't
1544 * preform any automatic brightness change on receiving a notification.
1545 */
4be44fcd 1546static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1da177e4 1547{
efaa14c7 1548 return acpi_video_bus_DOS(video, 0,
fbc9fe1b 1549 acpi_osi_is_win8() ? 1 : 0);
1da177e4
LT		 1550}
1551
4be44fcd 1552static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1da177e4 1553{
efaa14c7 1554 return acpi_video_bus_DOS(video, 0,
fbc9fe1b 1555 acpi_osi_is_win8() ? 0 : 1);
1da177e4
LT		 1556}
1557
7015558f 1558static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
1da177e4 1559{
7015558f 1560 struct acpi_video_bus *video = acpi_driver_data(device);
e9dab196 1561 struct input_dev *input;
17c452f9 1562 int keycode = 0;
e9dab196 1563
67b662e1 1564 if (!video || !video->input)
d550d98d 1565 return;
1da177e4 1566
e9dab196 1567 input = video->input;
1da177e4
LT		 1568
1569 switch (event) {
98fb8fe1 1570 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1da177e4 1571 * most likely via hotkey. */
8a37c65d 1572 keycode = KEY_SWITCHVIDEOMODE;
1da177e4
LT		 1573 break;
1574
98fb8fe1 1575 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1da177e4
LT		 1576 * connector. */
1577 acpi_video_device_enumerate(video);
1578 acpi_video_device_rebind(video);
e9dab196 1579 keycode = KEY_SWITCHVIDEOMODE;
1da177e4
LT		 1580 break;
1581
4be44fcd 1582 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
e9dab196
LY		 1583 keycode = KEY_SWITCHVIDEOMODE;
1584 break;
4be44fcd 1585 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
e9dab196
LY		 1586 keycode = KEY_VIDEO_NEXT;
1587 break;
4be44fcd 1588 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
e9dab196 1589 keycode = KEY_VIDEO_PREV;
1da177e4
LT		 1590 break;
1591
1592 default:
1593 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd 1594 "Unsupported event [0x%x]\n", event));
1da177e4
LT		 1595 break;
1596 }
1597
8a37c65d
LT		 1598 if (acpi_notifier_call_chain(device, event, 0))
1599 /* Something vetoed the keypress. */
1600 keycode = 0;
17c452f9
MG		 1601
1602 if (keycode) {
1603 input_report_key(input, keycode, 1);
1604 input_sync(input);
1605 input_report_key(input, keycode, 0);
1606 input_sync(input);
1607 }
e9dab196 1608
d550d98d 1609 return;
1da177e4
LT		 1610}
1611
4be44fcd 1612static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1da177e4 1613{
50dd0969 1614 struct acpi_video_device *video_device = data;
4be44fcd 1615 struct acpi_device *device = NULL;
e9dab196
LY		 1616 struct acpi_video_bus *bus;
1617 struct input_dev *input;
17c452f9 1618 int keycode = 0;
1da177e4 1619
1da177e4 1620 if (!video_device)
d550d98d 1621 return;
1da177e4 1622
e6afa0de 1623 device = video_device->dev;
e9dab196
LY		 1624 bus = video_device->video;
1625 input = bus->input;
1da177e4
LT		 1626
1627 switch (event) {
4be44fcd 1628 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
8a681a4d
ZR		 1629 if (brightness_switch_enabled)
1630 acpi_video_switch_brightness(video_device, event);
e9dab196
LY		 1631 keycode = KEY_BRIGHTNESS_CYCLE;
1632 break;
4be44fcd 1633 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
8a681a4d
ZR		 1634 if (brightness_switch_enabled)
1635 acpi_video_switch_brightness(video_device, event);
e9dab196
LY		 1636 keycode = KEY_BRIGHTNESSUP;
1637 break;
4be44fcd 1638 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
8a681a4d
ZR		 1639 if (brightness_switch_enabled)
1640 acpi_video_switch_brightness(video_device, event);
e9dab196
LY		 1641 keycode = KEY_BRIGHTNESSDOWN;
1642 break;
70f23fd6 1643 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */
8a681a4d
ZR		 1644 if (brightness_switch_enabled)
1645 acpi_video_switch_brightness(video_device, event);
e9dab196
LY		 1646 keycode = KEY_BRIGHTNESS_ZERO;
1647 break;
4be44fcd 1648 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
8a681a4d
ZR		 1649 if (brightness_switch_enabled)
1650 acpi_video_switch_brightness(video_device, event);
e9dab196 1651 keycode = KEY_DISPLAY_OFF;
1da177e4
LT		 1652 break;
1653 default:
1654 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd 1655 "Unsupported event [0x%x]\n", event));
1da177e4
LT		 1656 break;
1657 }
e9dab196 1658
7761f638 1659 acpi_notifier_call_chain(device, event, 0);
17c452f9
MG		 1660
1661 if (keycode) {
1662 input_report_key(input, keycode, 1);
1663 input_sync(input);
1664 input_report_key(input, keycode, 0);
1665 input_sync(input);
1666 }
e9dab196 1667
d550d98d 1668 return;
1da177e4
LT		 1669}
1670
ac7729da
RW		 1671static int acpi_video_resume(struct notifier_block *nb,
1672 unsigned long val, void *ign)
863c1490
MG		 1673{
1674 struct acpi_video_bus *video;
1675 struct acpi_video_device *video_device;
1676 int i;
1677
ac7729da
RW		 1678 switch (val) {
1679 case PM_HIBERNATION_PREPARE:
1680 case PM_SUSPEND_PREPARE:
1681 case PM_RESTORE_PREPARE:
1682 return NOTIFY_DONE;
1683 }
863c1490 1684
ac7729da
RW		 1685 video = container_of(nb, struct acpi_video_bus, pm_nb);
1686
1687 dev_info(&video->device->dev, "Restoring backlight state\n");
863c1490
MG		 1688
1689 for (i = 0; i < video->attached_count; i++) {
1690 video_device = video->attached_array[i].bind_info;
1691 if (video_device && video_device->backlight)
1692 acpi_video_set_brightness(video_device->backlight);
1693 }
ac7729da
RW		 1694
1695 return NOTIFY_OK;
863c1490
MG		 1696}
1697
c504f8cb
ZR		 1698static acpi_status
1699acpi_video_bus_match(acpi_handle handle, u32 level, void *context,
1700 void **return_value)
1701{
1702 struct acpi_device *device = context;
1703 struct acpi_device *sibling;
1704 int result;
1705
1706 if (handle == device->handle)
1707 return AE_CTRL_TERMINATE;
1708
1709 result = acpi_bus_get_device(handle, &sibling);
1710 if (result)
1711 return AE_OK;
1712
1713 if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME))
1714 return AE_ALREADY_EXISTS;
1715
1716 return AE_OK;
1717}
1718
67b662e1
AL		 1719static void acpi_video_dev_register_backlight(struct acpi_video_device *device)
1720{
99678ed7
HG		 1721 struct backlight_properties props;
1722 struct pci_dev *pdev;
1723 acpi_handle acpi_parent;
1724 struct device *parent = NULL;
1725 int result;
1726 static int count;
1727 char *name;
67b662e1 1728
99678ed7
HG		 1729 result = acpi_video_init_brightness(device);
1730 if (result)
1731 return;
1732 name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
1733 if (!name)
1734 return;
1735 count++;
67b662e1 1736
99678ed7 1737 acpi_get_parent(device->dev->handle, &acpi_parent);
67b662e1 1738
99678ed7
HG		 1739 pdev = acpi_get_pci_dev(acpi_parent);
1740 if (pdev) {
1741 parent = &pdev->dev;
1742 pci_dev_put(pdev);
1743 }
67b662e1 1744
99678ed7
HG		 1745 memset(&props, 0, sizeof(struct backlight_properties));
1746 props.type = BACKLIGHT_FIRMWARE;
1747 props.max_brightness = device->brightness->count - 3;
1748 device->backlight = backlight_device_register(name,
1749 parent,
1750 device,
1751 &acpi_backlight_ops,
1752 &props);
1753 kfree(name);
1754 if (IS_ERR(device->backlight))
1755 return;
67b662e1 1756
99678ed7
HG		 1757 /*
1758 * Save current brightness level in case we have to restore it
1759 * before acpi_video_device_lcd_set_level() is called next time.
1760 */
1761 device->backlight->props.brightness =
1762 acpi_video_get_brightness(device->backlight);
67b662e1 1763
99678ed7
HG		 1764 device->cooling_dev = thermal_cooling_device_register("LCD",
1765 device->dev, &video_cooling_ops);
1766 if (IS_ERR(device->cooling_dev)) {
1767 /*
1768 * Set cooling_dev to NULL so we don't crash trying to free it.
1769 * Also, why the hell we are returning early and not attempt to
1770 * register video output if cooling device registration failed?
1771 * -- dtor
1772 */
1773 device->cooling_dev = NULL;
1774 return;
67b662e1 1775 }
99678ed7
HG		 1776
1777 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
1778 device->cooling_dev->id);
1779 result = sysfs_create_link(&device->dev->dev.kobj,
1780 &device->cooling_dev->device.kobj,
1781 "thermal_cooling");
1782 if (result)
1783 printk(KERN_ERR PREFIX "Create sysfs link\n");
1784 result = sysfs_create_link(&device->cooling_dev->device.kobj,
1785 &device->dev->dev.kobj, "device");
1786 if (result)
1787 printk(KERN_ERR PREFIX "Create sysfs link\n");
67b662e1
AL		 1788}
1789
1790static int acpi_video_bus_register_backlight(struct acpi_video_bus *video)
1791{
1792 struct acpi_video_device *dev;
1793
53a92ba7
HG		 1794 if (video->backlight_registered)
1795 return 0;
1796
99678ed7
HG		 1797 if (!acpi_video_verify_backlight_support())
1798 return 0;
1799
67b662e1
AL		 1800 mutex_lock(&video->device_list_lock);
1801 list_for_each_entry(dev, &video->video_device_list, entry)
1802 acpi_video_dev_register_backlight(dev);
1803 mutex_unlock(&video->device_list_lock);
1804
99678ed7
HG		 1805 video->backlight_registered = true;
1806
67b662e1
AL		 1807 video->pm_nb.notifier_call = acpi_video_resume;
1808 video->pm_nb.priority = 0;
1809 return register_pm_notifier(&video->pm_nb);
1810}
1811
1812static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device)
1813{
1814 if (device->backlight) {
1815 backlight_device_unregister(device->backlight);
1816 device->backlight = NULL;
1817 }
1818 if (device->brightness) {
1819 kfree(device->brightness->levels);
1820 kfree(device->brightness);
1821 device->brightness = NULL;
1822 }
1823 if (device->cooling_dev) {
1824 sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling");
1825 sysfs_remove_link(&device->cooling_dev->device.kobj, "device");
1826 thermal_cooling_device_unregister(device->cooling_dev);
1827 device->cooling_dev = NULL;
1828 }
1829}
1830
1831static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video)
1832{
1833 struct acpi_video_device *dev;
99678ed7
HG		 1834 int error;
1835
1836 if (!video->backlight_registered)
1837 return 0;
1838
1839 error = unregister_pm_notifier(&video->pm_nb);
67b662e1
AL		 1840
1841 mutex_lock(&video->device_list_lock);
1842 list_for_each_entry(dev, &video->video_device_list, entry)
1843 acpi_video_dev_unregister_backlight(dev);
1844 mutex_unlock(&video->device_list_lock);
1845
99678ed7
HG		 1846 video->backlight_registered = false;
1847
67b662e1
AL		 1848 return error;
1849}
1850
1851static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device)
1852{
1853 acpi_status status;
1854 struct acpi_device *adev = device->dev;
1855
1856 status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,
1857 acpi_video_device_notify, device);
1858 if (ACPI_FAILURE(status))
1859 dev_err(&adev->dev, "Error installing notify handler\n");
1860 else
1861 device->flags.notify = 1;
1862}
1863
1864static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video)
1865{
1866 struct input_dev *input;
1867 struct acpi_video_device *dev;
1868 int error;
1869
1870 video->input = input = input_allocate_device();
1871 if (!input) {
1872 error = -ENOMEM;
1873 goto out;
1874 }
1875
1876 error = acpi_video_bus_start_devices(video);
1877 if (error)
1878 goto err_free_input;
1879
1880 snprintf(video->phys, sizeof(video->phys),
1881 "%s/video/input0", acpi_device_hid(video->device));
1882
1883 input->name = acpi_device_name(video->device);
1884 input->phys = video->phys;
1885 input->id.bustype = BUS_HOST;
1886 input->id.product = 0x06;
1887 input->dev.parent = &video->device->dev;
1888 input->evbit[0] = BIT(EV_KEY);
1889 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
1890 set_bit(KEY_VIDEO_NEXT, input->keybit);
1891 set_bit(KEY_VIDEO_PREV, input->keybit);
1892 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
1893 set_bit(KEY_BRIGHTNESSUP, input->keybit);
1894 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
1895 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
1896 set_bit(KEY_DISPLAY_OFF, input->keybit);
1897
1898 error = input_register_device(input);
1899 if (error)
1900 goto err_stop_dev;
1901
1902 mutex_lock(&video->device_list_lock);
1903 list_for_each_entry(dev, &video->video_device_list, entry)
1904 acpi_video_dev_add_notify_handler(dev);
1905 mutex_unlock(&video->device_list_lock);
1906
1907 return 0;
1908
1909err_stop_dev:
1910 acpi_video_bus_stop_devices(video);
1911err_free_input:
1912 input_free_device(input);
1913 video->input = NULL;
1914out:
1915 return error;
1916}
1917
1918static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev)
1919{
1920 if (dev->flags.notify) {
1921 acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY,
1922 acpi_video_device_notify);
1923 dev->flags.notify = 0;
1924 }
1925}
1926
1927static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video)
1928{
1929 struct acpi_video_device *dev;
1930
1931 mutex_lock(&video->device_list_lock);
1932 list_for_each_entry(dev, &video->video_device_list, entry)
1933 acpi_video_dev_remove_notify_handler(dev);
1934 mutex_unlock(&video->device_list_lock);
1935
1936 acpi_video_bus_stop_devices(video);
1937 input_unregister_device(video->input);
1938 video->input = NULL;
1939}
1940
53a92ba7
HG		 1941static int acpi_video_backlight_notify(struct notifier_block *nb,
1942 unsigned long val, void *bd)
1943{
1944 struct backlight_device *backlight = bd;
1945 struct acpi_video_bus *video;
1946
1947 /* acpi_video_verify_backlight_support only cares about raw devices */
1948 if (backlight->props.type != BACKLIGHT_RAW)
1949 return NOTIFY_DONE;
1950
1951 video = container_of(nb, struct acpi_video_bus, backlight_nb);
1952
1953 switch (val) {
1954 case BACKLIGHT_REGISTERED:
1955 if (!acpi_video_verify_backlight_support())
1956 acpi_video_bus_unregister_backlight(video);
1957 break;
1958 case BACKLIGHT_UNREGISTERED:
1959 acpi_video_bus_register_backlight(video);
1960 break;
1961 }
1962
1963 return NOTIFY_OK;
1964}
1965
1966static int acpi_video_bus_add_backlight_notify_handler(
1967 struct acpi_video_bus *video)
1968{
1969 int error;
1970
1971 video->backlight_nb.notifier_call = acpi_video_backlight_notify;
1972 video->backlight_nb.priority = 0;
1973 error = backlight_register_notifier(&video->backlight_nb);
1974 if (error == 0)
1975 video->backlight_notifier_registered = true;
1976
1977 return error;
1978}
1979
1980static int acpi_video_bus_remove_backlight_notify_handler(
1981 struct acpi_video_bus *video)
1982{
1983 if (!video->backlight_notifier_registered)
1984 return 0;
1985
1986 video->backlight_notifier_registered = false;
1987
1988 return backlight_unregister_notifier(&video->backlight_nb);
1989}
1990
67b662e1
AL		 1991static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1992{
1993 struct acpi_video_device *dev, *next;
1994
1995 mutex_lock(&video->device_list_lock);
1996 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1997 list_del(&dev->entry);
1998 kfree(dev);
1999 }
2000 mutex_unlock(&video->device_list_lock);
2001
2002 return 0;
2003}
2004
ac7729da
RW		 2005static int instance;
2006
4be44fcd 2007static int acpi_video_bus_add(struct acpi_device *device)
1da177e4 2008{
f51e8391 2009 struct acpi_video_bus *video;
f51e8391 2010 int error;
c504f8cb
ZR		 2011 acpi_status status;
2012
2013 status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
2014 device->parent->handle, 1,
2015 acpi_video_bus_match, NULL,
2016 device, NULL);
2017 if (status == AE_ALREADY_EXISTS) {
2018 printk(KERN_WARNING FW_BUG
2019 "Duplicate ACPI video bus devices for the"
2020 " same VGA controller, please try module "
2021 "parameter \"video.allow_duplicates=1\""
2022 "if the current driver doesn't work.\n");
2023 if (!allow_duplicates)
2024 return -ENODEV;
2025 }
1da177e4 2026
36bcbec7 2027 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1da177e4 2028 if (!video)
d550d98d 2029 return -ENOMEM;
1da177e4 2030
e6d9da1d
ZR		 2031 /* a hack to fix the duplicate name "VID" problem on T61 */
2032 if (!strcmp(device->pnp.bus_id, "VID")) {
2033 if (instance)
2034 device->pnp.bus_id[3] = '0' + instance;
915ea7e4 2035 instance++;
e6d9da1d 2036 }
f3b39f13
ZY		 2037 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2038 if (!strcmp(device->pnp.bus_id, "VGA")) {
2039 if (instance)
2040 device->pnp.bus_id[3] = '0' + instance;
2041 instance++;
2042 }
e6d9da1d 2043
e6afa0de 2044 video->device = device;
1da177e4
LT		 2045 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2046 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
db89b4f0 2047 device->driver_data = video;
1da177e4
LT		 2048
2049 acpi_video_bus_find_cap(video);
f51e8391
DT		 2050 error = acpi_video_bus_check(video);
2051 if (error)
2052 goto err_free_video;
1da177e4 2053
bbac81f5 2054 mutex_init(&video->device_list_lock);
1da177e4
LT		 2055 INIT_LIST_HEAD(&video->video_device_list);
2056
ea9f8856
IM		 2057 error = acpi_video_bus_get_devices(video, device);
2058 if (error)
91e13aa3 2059 goto err_put_video;
1da177e4 2060
1da177e4 2061 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
4be44fcd
LB		 2062 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2063 video->flags.multihead ? "yes" : "no",
2064 video->flags.rom ? "yes" : "no",
2065 video->flags.post ? "yes" : "no");
67b662e1
AL		 2066 mutex_lock(&video_list_lock);
2067 list_add_tail(&video->entry, &video_bus_head);
2068 mutex_unlock(&video_list_lock);
1da177e4 2069
67b662e1
AL		 2070 acpi_video_bus_register_backlight(video);
2071 acpi_video_bus_add_notify_handler(video);
53a92ba7 2072 acpi_video_bus_add_backlight_notify_handler(video);
ac7729da 2073
f51e8391
DT		 2074 return 0;
2075
67b662e1 2076err_put_video:
f51e8391
DT		 2077 acpi_video_bus_put_devices(video);
2078 kfree(video->attached_array);
67b662e1 2079err_free_video:
f51e8391 2080 kfree(video);
db89b4f0 2081 device->driver_data = NULL;
1da177e4 2082
f51e8391 2083 return error;
1da177e4
LT		 2084}
2085
51fac838 2086static int acpi_video_bus_remove(struct acpi_device *device)
1da177e4 2087{
4be44fcd 2088 struct acpi_video_bus *video = NULL;
1da177e4 2089
1da177e4
LT		 2090
2091 if (!device || !acpi_driver_data(device))
d550d98d 2092 return -EINVAL;
1da177e4 2093
50dd0969 2094 video = acpi_driver_data(device);
1da177e4 2095
53a92ba7 2096 acpi_video_bus_remove_backlight_notify_handler(video);
67b662e1
AL		 2097 acpi_video_bus_remove_notify_handler(video);
2098 acpi_video_bus_unregister_backlight(video);
1da177e4 2099 acpi_video_bus_put_devices(video);
1da177e4 2100
67b662e1
AL		 2101 mutex_lock(&video_list_lock);
2102 list_del(&video->entry);
2103 mutex_unlock(&video_list_lock);
2104
6044ec88 2105 kfree(video->attached_array);
1da177e4
LT		 2106 kfree(video);
2107
d550d98d 2108 return 0;
1da177e4
LT		 2109}
2110
c6996bdd
AC		 2111static int __init is_i740(struct pci_dev *dev)
2112{
2113 if (dev->device == 0x00D1)
2114 return 1;
2115 if (dev->device == 0x7000)
2116 return 1;
2117 return 0;
2118}
2119
74a365b3
MG		 2120static int __init intel_opregion_present(void)
2121{
c6996bdd 2122 int opregion = 0;
74a365b3
MG		 2123 struct pci_dev *dev = NULL;
2124 u32 address;
2125
2126 for_each_pci_dev(dev) {
2127 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2128 continue;
2129 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2130 continue;
c6996bdd
AC		 2131 /* We don't want to poke around undefined i740 registers */
2132 if (is_i740(dev))
2133 continue;
74a365b3
MG		 2134 pci_read_config_dword(dev, 0xfc, &address);
2135 if (!address)
2136 continue;
c6996bdd 2137 opregion = 1;
74a365b3 2138 }
c6996bdd 2139 return opregion;
74a365b3
MG		 2140}
2141
8e5c2b77 2142int acpi_video_register(void)
1da177e4 2143{
8e5c2b77 2144 int result = 0;
86e437f0
ZY		 2145 if (register_count) {
2146 /*
8e5c2b77
RW		 2147 * if the function of acpi_video_register is already called,
2148 * don't register the acpi_vide_bus again and return no error.
86e437f0
ZY		 2149 */
2150 return 0;
2151 }
1da177e4 2152
67b662e1
AL		 2153 mutex_init(&video_list_lock);
2154 INIT_LIST_HEAD(&video_bus_head);
2155
1da177e4 2156 result = acpi_bus_register_driver(&acpi_video_bus);
39fe394d 2157 if (result < 0)
d550d98d 2158 return -ENODEV;
1da177e4 2159
86e437f0
ZY		 2160 /*
2161 * When the acpi_video_bus is loaded successfully, increase
2162 * the counter reference.
2163 */
2164 register_count = 1;
2165
d550d98d 2166 return 0;
1da177e4 2167}
8e5c2b77 2168EXPORT_SYMBOL(acpi_video_register);
74a365b3 2169
86e437f0
ZY		 2170void acpi_video_unregister(void)
2171{
2172 if (!register_count) {
2173 /*
2174 * If the acpi video bus is already unloaded, don't
2175 * unload it again and return directly.
2176 */
2177 return;
2178 }
2179 acpi_bus_unregister_driver(&acpi_video_bus);
2180
86e437f0
ZY		 2181 register_count = 0;
2182
2183 return;
2184}
2185EXPORT_SYMBOL(acpi_video_unregister);
2186
1b7f37e1
HG		 2187void acpi_video_unregister_backlight(void)
2188{
2189 struct acpi_video_bus *video;
2190
2191 if (!register_count)
2192 return;
2193
2194 mutex_lock(&video_list_lock);
2195 list_for_each_entry(video, &video_bus_head, entry)
2196 acpi_video_bus_unregister_backlight(video);
2197 mutex_unlock(&video_list_lock);
2198}
2199EXPORT_SYMBOL(acpi_video_unregister_backlight);
2200
74a365b3
MG		 2201/*
2202 * This is kind of nasty. Hardware using Intel chipsets may require
2203 * the video opregion code to be run first in order to initialise
2204 * state before any ACPI video calls are made. To handle this we defer
2205 * registration of the video class until the opregion code has run.
2206 */
2207
2208static int __init acpi_video_init(void)
2209{
45cb50e6
ZR		 2210 dmi_check_system(video_dmi_table);
2211
74a365b3
MG		 2212 if (intel_opregion_present())
2213 return 0;
2214
2215 return acpi_video_register();
2216}
1da177e4 2217
86e437f0 2218static void __exit acpi_video_exit(void)
1da177e4 2219{
86e437f0 2220 acpi_video_unregister();
1da177e4 2221
d550d98d 2222 return;
1da177e4
LT		 2223}
2224
2225module_init(acpi_video_init);
2226module_exit(acpi_video_exit);
Linux kernel - Deliverables
This page took 1.597286 seconds and 5 git commands to generate.