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ACPI / video: Add use native backlight quirk for the ThinkPad W530
[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
886129a8 71static bool brightness_switch_enabled;
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 */
0e9f81d3
AL		 85static int use_native_backlight_param = -1;
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
fbc9fe1b
AL		 244static bool acpi_video_verify_backlight_support(void)
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}
251
21fcb34e 252/* backlight device sysfs support */
2f3d000a
YL		 253static int acpi_video_get_brightness(struct backlight_device *bd)
254{
27663c58 255 unsigned long long cur_level;
38531e6f 256 int i;
7c364e79 257 struct acpi_video_device *vd = bl_get_data(bd);
c8890f90 258
a89803df 259 if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false))
c8890f90 260 return -EINVAL;
38531e6f
MG		 261 for (i = 2; i < vd->brightness->count; i++) {
262 if (vd->brightness->levels[i] == cur_level)
21fcb34e
FC		 263 /*
264 * The first two entries are special - see page 575
265 * of the ACPI spec 3.0
266 */
915ea7e4 267 return i - 2;
38531e6f
MG		 268 }
269 return 0;
2f3d000a
YL		 270}
271
272static int acpi_video_set_brightness(struct backlight_device *bd)
273{
24450c7a 274 int request_level = bd->props.brightness + 2;
7c364e79 275 struct acpi_video_device *vd = bl_get_data(bd);
24450c7a
ZR		 276
277 return acpi_video_device_lcd_set_level(vd,
278 vd->brightness->levels[request_level]);
2f3d000a
YL		 279}
280
acc2472e 281static const struct backlight_ops acpi_backlight_ops = {
599a52d1
RP		 282 .get_brightness = acpi_video_get_brightness,
283 .update_status = acpi_video_set_brightness,
284};
285
702ed512 286/* thermal cooling device callbacks */
4a703a8f 287static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned
6503e5df 288 long *state)
702ed512 289{
4a703a8f 290 struct acpi_device *device = cooling_dev->devdata;
702ed512
ZR		 291 struct acpi_video_device *video = acpi_driver_data(device);
292
6503e5df
MG		 293 *state = video->brightness->count - 3;
294 return 0;
702ed512
ZR		 295}
296
4a703a8f 297static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned
6503e5df 298 long *state)
702ed512 299{
4a703a8f 300 struct acpi_device *device = cooling_dev->devdata;
702ed512 301 struct acpi_video_device *video = acpi_driver_data(device);
27663c58 302 unsigned long long level;
6503e5df 303 int offset;
702ed512 304
a89803df 305 if (acpi_video_device_lcd_get_level_current(video, &level, false))
c8890f90 306 return -EINVAL;
6503e5df
MG		 307 for (offset = 2; offset < video->brightness->count; offset++)
308 if (level == video->brightness->levels[offset]) {
309 *state = video->brightness->count - offset - 1;
310 return 0;
311 }
702ed512
ZR		 312
313 return -EINVAL;
314}
315
316static int
4a703a8f 317video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state)
702ed512 318{
4a703a8f 319 struct acpi_device *device = cooling_dev->devdata;
702ed512
ZR		 320 struct acpi_video_device *video = acpi_driver_data(device);
321 int level;
322
915ea7e4 323 if (state >= video->brightness->count - 2)
702ed512
ZR		 324 return -EINVAL;
325
326 state = video->brightness->count - state;
915ea7e4 327 level = video->brightness->levels[state - 1];
702ed512
ZR		 328 return acpi_video_device_lcd_set_level(video, level);
329}
330
9c8b04be 331static const struct thermal_cooling_device_ops video_cooling_ops = {
702ed512
ZR		 332 .get_max_state = video_get_max_state,
333 .get_cur_state = video_get_cur_state,
334 .set_cur_state = video_set_cur_state,
335};
336
21fcb34e
FC		 337/*
338 * --------------------------------------------------------------------------
339 * Video Management
340 * --------------------------------------------------------------------------
341 */
1da177e4 342
1da177e4 343static int
4be44fcd
LB		 344acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
345 union acpi_object **levels)
1da177e4 346{
4be44fcd
LB		 347 int status;
348 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
349 union acpi_object *obj;
1da177e4 350
1da177e4
LT		 351
352 *levels = NULL;
353
90130268 354 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
1da177e4 355 if (!ACPI_SUCCESS(status))
d550d98d 356 return status;
4be44fcd 357 obj = (union acpi_object *)buffer.pointer;
6665bda7 358 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6468463a 359 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
1da177e4
LT		 360 status = -EFAULT;
361 goto err;
362 }
363
364 *levels = obj;
365
d550d98d 366 return 0;
1da177e4 367
915ea7e4 368err:
6044ec88 369 kfree(buffer.pointer);
1da177e4 370
d550d98d 371 return status;
1da177e4
LT		 372}
373
374static int
4be44fcd 375acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
1da177e4 376{
24450c7a 377 int status;
9e6dada9 378 int state;
1da177e4 379
0db98202
JL		 380 status = acpi_execute_simple_method(device->dev->handle,
381 "_BCM", level);
24450c7a
ZR		 382 if (ACPI_FAILURE(status)) {
383 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
384 return -EIO;
385 }
386
4500ca8e 387 device->brightness->curr = level;
9e6dada9 388 for (state = 2; state < device->brightness->count; state++)
24450c7a 389 if (level == device->brightness->levels[state]) {
1a7c618a
ZR		 390 if (device->backlight)
391 device->backlight->props.brightness = state - 2;
24450c7a
ZR		 392 return 0;
393 }
9e6dada9 394
24450c7a
ZR		 395 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
396 return -EINVAL;
1da177e4
LT		 397}
398
45cb50e6
ZR		 399/*
400 * For some buggy _BQC methods, we need to add a constant value to
401 * the _BQC return value to get the actual current brightness level
402 */
403
404static int bqc_offset_aml_bug_workaround;
405static int __init video_set_bqc_offset(const struct dmi_system_id *d)
406{
407 bqc_offset_aml_bug_workaround = 9;
408 return 0;
409}
410
0e9f81d3
AL		 411static int __init video_set_use_native_backlight(const struct dmi_system_id *d)
412{
413 use_native_backlight_dmi = true;
414 return 0;
415}
416
45cb50e6
ZR		 417static struct dmi_system_id video_dmi_table[] __initdata = {
418 /*
419 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
420 */
421 {
422 .callback = video_set_bqc_offset,
423 .ident = "Acer Aspire 5720",
424 .matches = {
425 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
426 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
427 },
428 },
5afc4abe
LB		 429 {
430 .callback = video_set_bqc_offset,
431 .ident = "Acer Aspire 5710Z",
432 .matches = {
433 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
434 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
435 },
436 },
34ac272b
ZR		 437 {
438 .callback = video_set_bqc_offset,
439 .ident = "eMachines E510",
440 .matches = {
441 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
442 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
443 },
444 },
93bcece2
ZR		 445 {
446 .callback = video_set_bqc_offset,
447 .ident = "Acer Aspire 5315",
448 .matches = {
449 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
450 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
451 },
452 },
152a4e63
ZR		 453 {
454 .callback = video_set_bqc_offset,
455 .ident = "Acer Aspire 7720",
456 .matches = {
457 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
458 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
459 },
460 },
0e9f81d3
AL		 461 {
462 .callback = video_set_use_native_backlight,
43d94902 463 .ident = "ThinkPad T430 and T430s",
0e9f81d3
AL		 464 .matches = {
465 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
43d94902 466 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T430"),
0e9f81d3
AL		 467 },
468 },
469 {
470 .callback = video_set_use_native_backlight,
471 .ident = "ThinkPad X230",
472 .matches = {
473 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
474 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"),
475 },
476 },
1e815db6
HG		 477 {
478 .callback = video_set_use_native_backlight,
479 .ident = "ThinkPad W530",
480 .matches = {
481 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
482 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W530"),
483 },
484 },
43d94902
HG		 485 {
486 .callback = video_set_use_native_backlight,
0e9f81d3
AL		 487 .ident = "ThinkPad X1 Carbon",
488 .matches = {
489 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
490 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X1 Carbon"),
491 },
492 },
493 {
494 .callback = video_set_use_native_backlight,
495 .ident = "Lenovo Yoga 13",
496 .matches = {
497 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
498 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"),
499 },
500 },
997dd7fe
SCP		 501 {
502 .callback = video_set_use_native_backlight,
503 .ident = "Thinkpad Helix",
504 .matches = {
505 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
506 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"),
507 },
508 },
0e9f81d3
AL		 509 {
510 .callback = video_set_use_native_backlight,
511 .ident = "Dell Inspiron 7520",
512 .matches = {
513 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
5ff365fb 514 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
0e9f81d3
AL		 515 },
516 },
517 {
518 .callback = video_set_use_native_backlight,
519 .ident = "Acer Aspire 5733Z",
520 .matches = {
521 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
522 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5733Z"),
523 },
524 },
43d94902
HG		 525 {
526 .callback = video_set_use_native_backlight,
527 .ident = "Acer Aspire 5742G",
528 .matches = {
529 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
530 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5742G"),
531 },
532 },
0e9f81d3
AL		 533 {
534 .callback = video_set_use_native_backlight,
535 .ident = "Acer Aspire V5-431",
536 .matches = {
537 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
538 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-431"),
539 },
540 },
541 {
542 .callback = video_set_use_native_backlight,
543 .ident = "HP ProBook 4340s",
544 .matches = {
545 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
546 DMI_MATCH(DMI_PRODUCT_VERSION, "HP ProBook 4340s"),
547 },
548 },
549 {
550 .callback = video_set_use_native_backlight,
551 .ident = "HP ProBook 2013 models",
552 .matches = {
553 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
554 DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook "),
555 DMI_MATCH(DMI_PRODUCT_NAME, " G1"),
556 },
557 },
558 {
559 .callback = video_set_use_native_backlight,
560 .ident = "HP EliteBook 2013 models",
561 .matches = {
562 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
563 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook "),
564 DMI_MATCH(DMI_PRODUCT_NAME, " G1"),
565 },
566 },
567 {
568 .callback = video_set_use_native_backlight,
569 .ident = "HP ZBook 14",
570 .matches = {
571 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
572 DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 14"),
573 },
574 },
575 {
576 .callback = video_set_use_native_backlight,
577 .ident = "HP ZBook 15",
578 .matches = {
579 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
580 DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 15"),
581 },
582 },
583 {
584 .callback = video_set_use_native_backlight,
585 .ident = "HP ZBook 17",
586 .matches = {
587 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
588 DMI_MATCH(DMI_PRODUCT_NAME, "HP ZBook 17"),
589 },
590 },
591 {
592 .callback = video_set_use_native_backlight,
593 .ident = "HP EliteBook 8780w",
594 .matches = {
595 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
596 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"),
597 },
598 },
45cb50e6
ZR		 599 {}
600};
601
994fa63c
DB		 602static unsigned long long
603acpi_video_bqc_value_to_level(struct acpi_video_device *device,
604 unsigned long long bqc_value)
605{
606 unsigned long long level;
607
608 if (device->brightness->flags._BQC_use_index) {
609 /*
610 * _BQC returns an index that doesn't account for
611 * the first 2 items with special meaning, so we need
612 * to compensate for that by offsetting ourselves
613 */
614 if (device->brightness->flags._BCL_reversed)
615 bqc_value = device->brightness->count - 3 - bqc_value;
616
617 level = device->brightness->levels[bqc_value + 2];
618 } else {
619 level = bqc_value;
620 }
621
622 level += bqc_offset_aml_bug_workaround;
623
624 return level;
625}
626
1da177e4 627static int
4be44fcd 628acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
a89803df 629 unsigned long long *level, bool raw)
1da177e4 630{
c8890f90 631 acpi_status status = AE_OK;
4e231fa4 632 int i;
c8890f90 633
c60d638e
ZR		 634 if (device->cap._BQC || device->cap._BCQ) {
635 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
636
637 status = acpi_evaluate_integer(device->dev->handle, buf,
c8890f90
ZR		 638 NULL, level);
639 if (ACPI_SUCCESS(status)) {
a89803df
DB		 640 if (raw) {
641 /*
642 * Caller has indicated he wants the raw
643 * value returned by _BQC, so don't furtherly
644 * mess with the value.
645 */
646 return 0;
647 }
648
994fa63c 649 *level = acpi_video_bqc_value_to_level(device, *level);
1a7c618a 650
4e231fa4
VS		 651 for (i = 2; i < device->brightness->count; i++)
652 if (device->brightness->levels[i] == *level) {
653 device->brightness->curr = *level;
654 return 0;
915ea7e4 655 }
a89803df
DB		 656 /*
657 * BQC returned an invalid level.
658 * Stop using it.
659 */
660 ACPI_WARNING((AE_INFO,
661 "%s returned an invalid level",
662 buf));
663 device->cap._BQC = device->cap._BCQ = 0;
c8890f90 664 } else {
21fcb34e
FC		 665 /*
666 * Fixme:
c8890f90
ZR		 667 * should we return an error or ignore this failure?
668 * dev->brightness->curr is a cached value which stores
669 * the correct current backlight level in most cases.
670 * ACPI video backlight still works w/ buggy _BQC.
671 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
672 */
c60d638e
ZR		 673 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
674 device->cap._BQC = device->cap._BCQ = 0;
c8890f90
ZR		 675 }
676 }
677
4500ca8e 678 *level = device->brightness->curr;
c8890f90 679 return 0;
1da177e4
LT		 680}
681
682static int
4be44fcd
LB		 683acpi_video_device_EDID(struct acpi_video_device *device,
684 union acpi_object **edid, ssize_t length)
1da177e4 685{
4be44fcd
LB		 686 int status;
687 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
688 union acpi_object *obj;
689 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
690 struct acpi_object_list args = { 1, &arg0 };
1da177e4 691
1da177e4
LT		 692
693 *edid = NULL;
694
695 if (!device)
d550d98d 696 return -ENODEV;
1da177e4
LT		 697 if (length == 128)
698 arg0.integer.value = 1;
699 else if (length == 256)
700 arg0.integer.value = 2;
701 else
d550d98d 702 return -EINVAL;
1da177e4 703
90130268 704 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
1da177e4 705 if (ACPI_FAILURE(status))
d550d98d 706 return -ENODEV;
1da177e4 707
50dd0969 708 obj = buffer.pointer;
1da177e4
LT		 709
710 if (obj && obj->type == ACPI_TYPE_BUFFER)
711 *edid = obj;
712 else {
6468463a 713 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
1da177e4
LT		 714 status = -EFAULT;
715 kfree(obj);
716 }
717
d550d98d 718 return status;
1da177e4
LT		 719}
720
1da177e4
LT		 721/* bus */
722
1da177e4
LT		 723/*
724 * Arg:
21fcb34e
FC		 725 * video : video bus device pointer
726 * bios_flag :
1da177e4
LT		 727 * 0. The system BIOS should NOT automatically switch(toggle)
728 * the active display output.
729 * 1. The system BIOS should automatically switch (toggle) the
98fb8fe1 730 * active display output. No switch event.
1da177e4
LT		 731 * 2. The _DGS value should be locked.
732 * 3. The system BIOS should not automatically switch (toggle) the
733 * active display output, but instead generate the display switch
734 * event notify code.
735 * lcd_flag :
736 * 0. The system BIOS should automatically control the brightness level
98fb8fe1 737 * of the LCD when the power changes from AC to DC
21fcb34e 738 * 1. The system BIOS should NOT automatically control the brightness
98fb8fe1 739 * level of the LCD when the power changes from AC to DC.
21fcb34e 740 * Return Value:
ea9f8856 741 * -EINVAL wrong arg.
1da177e4
LT		 742 */
743
744static int
4be44fcd 745acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
1da177e4 746{
ea9f8856 747 acpi_status status;
1da177e4 748
b0373843
ZR		 749 if (!video->cap._DOS)
750 return 0;
1da177e4 751
ea9f8856
IM		 752 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1)
753 return -EINVAL;
0db98202
JL		 754 video->dos_setting = (lcd_flag << 2) | bios_flag;
755 status = acpi_execute_simple_method(video->device->handle, "_DOS",
756 (lcd_flag << 2) | bios_flag);
ea9f8856
IM		 757 if (ACPI_FAILURE(status))
758 return -EIO;
1da177e4 759
ea9f8856 760 return 0;
1da177e4
LT		 761}
762
935e5f29
ZR		 763/*
764 * Simple comparison function used to sort backlight levels.
765 */
766
767static int
768acpi_video_cmp_level(const void *a, const void *b)
769{
770 return *(int *)a - *(int *)b;
771}
772
a50188da
AL		 773/*
774 * Decides if _BQC/_BCQ for this system is usable
775 *
776 * We do this by changing the level first and then read out the current
777 * brightness level, if the value does not match, find out if it is using
778 * index. If not, clear the _BQC/_BCQ capability.
779 */
780static int acpi_video_bqc_quirk(struct acpi_video_device *device,
781 int max_level, int current_level)
782{
783 struct acpi_video_device_brightness *br = device->brightness;
784 int result;
785 unsigned long long level;
786 int test_level;
787
788 /* don't mess with existing known broken systems */
789 if (bqc_offset_aml_bug_workaround)
790 return 0;
791
792 /*
793 * Some systems always report current brightness level as maximum
794 * through _BQC, we need to test another value for them.
795 */
b3b301c5 796 test_level = current_level == max_level ? br->levels[3] : max_level;
a50188da
AL		 797
798 result = acpi_video_device_lcd_set_level(device, test_level);
799 if (result)
800 return result;
801
802 result = acpi_video_device_lcd_get_level_current(device, &level, true);
803 if (result)
804 return result;
805
806 if (level != test_level) {
807 /* buggy _BQC found, need to find out if it uses index */
808 if (level < br->count) {
809 if (br->flags._BCL_reversed)
810 level = br->count - 3 - level;
811 if (br->levels[level + 2] == test_level)
812 br->flags._BQC_use_index = 1;
813 }
814
815 if (!br->flags._BQC_use_index)
816 device->cap._BQC = device->cap._BCQ = 0;
817 }
818
819 return 0;
820}
821
822
1da177e4 823/*
21fcb34e
FC		 824 * Arg:
825 * device : video output device (LCD, CRT, ..)
1da177e4
LT		 826 *
827 * Return Value:
469778c1
JJ		 828 * Maximum brightness level
829 *
830 * Allocate and initialize device->brightness.
831 */
832
833static int
834acpi_video_init_brightness(struct acpi_video_device *device)
835{
836 union acpi_object *obj = NULL;
d32f6947 837 int i, max_level = 0, count = 0, level_ac_battery = 0;
1a7c618a 838 unsigned long long level, level_old;
469778c1
JJ		 839 union acpi_object *o;
840 struct acpi_video_device_brightness *br = NULL;
1a7c618a 841 int result = -EINVAL;
bd8ba205 842 u32 value;
469778c1
JJ		 843
844 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
845 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
846 "LCD brightness level\n"));
847 goto out;
848 }
849
850 if (obj->package.count < 2)
851 goto out;
852
853 br = kzalloc(sizeof(*br), GFP_KERNEL);
854 if (!br) {
855 printk(KERN_ERR "can't allocate memory\n");
1a7c618a 856 result = -ENOMEM;
469778c1
JJ		 857 goto out;
858 }
859
d32f6947 860 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
469778c1 861 GFP_KERNEL);
1a7c618a
ZR		 862 if (!br->levels) {
863 result = -ENOMEM;
469778c1 864 goto out_free;
1a7c618a 865 }
469778c1
JJ		 866
867 for (i = 0; i < obj->package.count; i++) {
868 o = (union acpi_object *)&obj->package.elements[i];
869 if (o->type != ACPI_TYPE_INTEGER) {
870 printk(KERN_ERR PREFIX "Invalid data\n");
871 continue;
872 }
bd8ba205
HG		 873 value = (u32) o->integer.value;
874 /* Skip duplicate entries */
875 if (count > 2 && br->levels[count - 1] == value)
876 continue;
877
878 br->levels[count] = value;
469778c1
JJ		 879
880 if (br->levels[count] > max_level)
881 max_level = br->levels[count];
882 count++;
883 }
884
d32f6947
ZR		 885 /*
886 * some buggy BIOS don't export the levels
887 * when machine is on AC/Battery in _BCL package.
888 * In this case, the first two elements in _BCL packages
889 * are also supported brightness levels that OS should take care of.
890 */
90af2cf6
ZR		 891 for (i = 2; i < count; i++) {
892 if (br->levels[i] == br->levels[0])
d32f6947 893 level_ac_battery++;
90af2cf6
ZR		 894 if (br->levels[i] == br->levels[1])
895 level_ac_battery++;
896 }
d32f6947
ZR		 897
898 if (level_ac_battery < 2) {
899 level_ac_battery = 2 - level_ac_battery;
900 br->flags._BCL_no_ac_battery_levels = 1;
901 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
902 br->levels[i] = br->levels[i - level_ac_battery];
903 count += level_ac_battery;
904 } else if (level_ac_battery > 2)
bf6787eb 905 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package"));
d32f6947 906
d80fb99f
ZR		 907 /* Check if the _BCL package is in a reversed order */
908 if (max_level == br->levels[2]) {
909 br->flags._BCL_reversed = 1;
910 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
911 acpi_video_cmp_level, NULL);
912 } else if (max_level != br->levels[count - 1])
913 ACPI_ERROR((AE_INFO,
bf6787eb 914 "Found unordered _BCL package"));
469778c1
JJ		 915
916 br->count = count;
917 device->brightness = br;
1a7c618a 918
1a7c618a 919 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
90c53ca4 920 br->curr = level = max_level;
e047cca6
ZR		 921
922 if (!device->cap._BQC)
923 goto set_level;
924
a89803df
DB		 925 result = acpi_video_device_lcd_get_level_current(device,
926 &level_old, true);
1a7c618a
ZR		 927 if (result)
928 goto out_free_levels;
929
a50188da 930 result = acpi_video_bqc_quirk(device, max_level, level_old);
1a7c618a
ZR		 931 if (result)
932 goto out_free_levels;
a50188da
AL		 933 /*
934 * cap._BQC may get cleared due to _BQC is found to be broken
935 * in acpi_video_bqc_quirk, so check again here.
936 */
937 if (!device->cap._BQC)
938 goto set_level;
e047cca6 939
545ef368
AL		 940 level = acpi_video_bqc_value_to_level(device, level_old);
941 /*
942 * On some buggy laptops, _BQC returns an uninitialized
943 * value when invoked for the first time, i.e.
944 * level_old is invalid (no matter whether it's a level
945 * or an index). Set the backlight to max_level in this case.
946 */
947 for (i = 2; i < br->count; i++)
948 if (level == br->levels[i])
949 break;
950 if (i == br->count || !level)
951 level = max_level;
e047cca6 952
e047cca6 953set_level:
90c53ca4 954 result = acpi_video_device_lcd_set_level(device, level);
e047cca6
ZR		 955 if (result)
956 goto out_free_levels;
1a7c618a 957
d32f6947
ZR		 958 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
959 "found %d brightness levels\n", count - 2));
469778c1 960 kfree(obj);
1a7c618a 961 return result;
469778c1
JJ		 962
963out_free_levels:
964 kfree(br->levels);
965out_free:
966 kfree(br);
967out:
968 device->brightness = NULL;
969 kfree(obj);
1a7c618a 970 return result;
469778c1
JJ		 971}
972
973/*
974 * Arg:
975 * device : video output device (LCD, CRT, ..)
976 *
977 * Return Value:
21fcb34e 978 * None
1da177e4 979 *
98fb8fe1 980 * Find out all required AML methods defined under the output
1da177e4
LT		 981 * device.
982 */
983
4be44fcd 984static void acpi_video_device_find_cap(struct acpi_video_device *device)
1da177e4 985{
952c63e9 986 if (acpi_has_method(device->dev->handle, "_ADR"))
1da177e4 987 device->cap._ADR = 1;
952c63e9 988 if (acpi_has_method(device->dev->handle, "_BCL"))
4be44fcd 989 device->cap._BCL = 1;
952c63e9 990 if (acpi_has_method(device->dev->handle, "_BCM"))
4be44fcd 991 device->cap._BCM = 1;
952c63e9 992 if (acpi_has_method(device->dev->handle, "_BQC")) {
2f3d000a 993 device->cap._BQC = 1;
952c63e9 994 } else if (acpi_has_method(device->dev->handle, "_BCQ")) {
c60d638e
ZR		 995 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
996 device->cap._BCQ = 1;
997 }
998
952c63e9 999 if (acpi_has_method(device->dev->handle, "_DDC"))
4be44fcd 1000 device->cap._DDC = 1;
1da177e4
LT		 1001}
1002
1003/*
21fcb34e
FC		 1004 * Arg:
1005 * device : video output device (VGA)
1da177e4
LT		 1006 *
1007 * Return Value:
21fcb34e 1008 * None
1da177e4 1009 *
98fb8fe1 1010 * Find out all required AML methods defined under the video bus device.
1da177e4
LT		 1011 */
1012
4be44fcd 1013static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1da177e4 1014{
952c63e9 1015 if (acpi_has_method(video->device->handle, "_DOS"))
1da177e4 1016 video->cap._DOS = 1;
952c63e9 1017 if (acpi_has_method(video->device->handle, "_DOD"))
1da177e4 1018 video->cap._DOD = 1;
952c63e9 1019 if (acpi_has_method(video->device->handle, "_ROM"))
1da177e4 1020 video->cap._ROM = 1;
952c63e9 1021 if (acpi_has_method(video->device->handle, "_GPD"))
1da177e4 1022 video->cap._GPD = 1;
952c63e9 1023 if (acpi_has_method(video->device->handle, "_SPD"))
1da177e4 1024 video->cap._SPD = 1;
952c63e9 1025 if (acpi_has_method(video->device->handle, "_VPO"))
1da177e4 1026 video->cap._VPO = 1;
1da177e4
LT		 1027}
1028
1029/*
1030 * Check whether the video bus device has required AML method to
1031 * support the desired features
1032 */
1033
4be44fcd 1034static int acpi_video_bus_check(struct acpi_video_bus *video)
1da177e4 1035{
4be44fcd 1036 acpi_status status = -ENOENT;
1e4cffe7 1037 struct pci_dev *dev;
1da177e4
LT		 1038
1039 if (!video)
d550d98d 1040 return -EINVAL;
1da177e4 1041
1e4cffe7 1042 dev = acpi_get_pci_dev(video->device->handle);
22c13f9d
TR		 1043 if (!dev)
1044 return -ENODEV;
1e4cffe7 1045 pci_dev_put(dev);
22c13f9d 1046
21fcb34e
FC		 1047 /*
1048 * Since there is no HID, CID and so on for VGA driver, we have
1da177e4
LT		 1049 * to check well known required nodes.
1050 */
1051
98fb8fe1 1052 /* Does this device support video switching? */
3a1151e3
SB		 1053 if (video->cap._DOS || video->cap._DOD) {
1054 if (!video->cap._DOS) {
1055 printk(KERN_WARNING FW_BUG
1056 "ACPI(%s) defines _DOD but not _DOS\n",
1057 acpi_device_bid(video->device));
1058 }
1da177e4
LT		 1059 video->flags.multihead = 1;
1060 status = 0;
1061 }
1062
98fb8fe1 1063 /* Does this device support retrieving a video ROM? */
4be44fcd 1064 if (video->cap._ROM) {
1da177e4
LT		 1065 video->flags.rom = 1;
1066 status = 0;
1067 }
1068
98fb8fe1 1069 /* Does this device support configuring which video device to POST? */
4be44fcd 1070 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1da177e4
LT		 1071 video->flags.post = 1;
1072 status = 0;
1073 }
1074
d550d98d 1075 return status;
1da177e4
LT		 1076}
1077
21fcb34e
FC		 1078/*
1079 * --------------------------------------------------------------------------
1080 * Driver Interface
1081 * --------------------------------------------------------------------------
1082 */
1da177e4
LT		 1083
1084/* device interface */
915ea7e4 1085static struct acpi_video_device_attrib *
82cae999
RZ		 1086acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1087{
78eed028
DT		 1088 struct acpi_video_enumerated_device *ids;
1089 int i;
1090
1091 for (i = 0; i < video->attached_count; i++) {
1092 ids = &video->attached_array[i];
1093 if ((ids->value.int_val & 0xffff) == device_id)
1094 return &ids->value.attrib;
1095 }
82cae999 1096
82cae999
RZ		 1097 return NULL;
1098}
1da177e4 1099
e92a7162
MG		 1100static int
1101acpi_video_get_device_type(struct acpi_video_bus *video,
1102 unsigned long device_id)
1103{
1104 struct acpi_video_enumerated_device *ids;
1105 int i;
1106
1107 for (i = 0; i < video->attached_count; i++) {
1108 ids = &video->attached_array[i];
1109 if ((ids->value.int_val & 0xffff) == device_id)
1110 return ids->value.int_val;
1111 }
1112
1113 return 0;
1114}
1115
1da177e4 1116static int
4be44fcd
LB		 1117acpi_video_bus_get_one_device(struct acpi_device *device,
1118 struct acpi_video_bus *video)
1da177e4 1119{
27663c58 1120 unsigned long long device_id;
e92a7162 1121 int status, device_type;
4be44fcd 1122 struct acpi_video_device *data;
915ea7e4 1123 struct acpi_video_device_attrib *attribute;
1da177e4 1124
4be44fcd
LB		 1125 status =
1126 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
91e13aa3
AL		 1127 /* Some device omits _ADR, we skip them instead of fail */
1128 if (ACPI_FAILURE(status))
1129 return 0;
1da177e4 1130
91e13aa3
AL		 1131 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1132 if (!data)
1133 return -ENOMEM;
82cae999 1134
91e13aa3
AL		 1135 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1136 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1137 device->driver_data = data;
1138
1139 data->device_id = device_id;
1140 data->video = video;
1141 data->dev = device;
1142
1143 attribute = acpi_video_get_device_attr(video, device_id);
1144
915ea7e4 1145 if (attribute && attribute->device_id_scheme) {
91e13aa3
AL		 1146 switch (attribute->display_type) {
1147 case ACPI_VIDEO_DISPLAY_CRT:
1148 data->flags.crt = 1;
1149 break;
1150 case ACPI_VIDEO_DISPLAY_TV:
1151 data->flags.tvout = 1;
1152 break;
1153 case ACPI_VIDEO_DISPLAY_DVI:
1154 data->flags.dvi = 1;
1155 break;
1156 case ACPI_VIDEO_DISPLAY_LCD:
1157 data->flags.lcd = 1;
1158 break;
1159 default:
1160 data->flags.unknown = 1;
1161 break;
1162 }
915ea7e4 1163 if (attribute->bios_can_detect)
91e13aa3
AL		 1164 data->flags.bios = 1;
1165 } else {
1166 /* Check for legacy IDs */
1167 device_type = acpi_video_get_device_type(video, device_id);
1168 /* Ignore bits 16 and 18-20 */
1169 switch (device_type & 0xffe2ffff) {
915ea7e4
FC		 1170 case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR:
1171 data->flags.crt = 1;
1172 break;
1173 case ACPI_VIDEO_DISPLAY_LEGACY_PANEL:
1174 data->flags.lcd = 1;
1175 break;
1176 case ACPI_VIDEO_DISPLAY_LEGACY_TV:
1177 data->flags.tvout = 1;
1178 break;
1179 default:
1180 data->flags.unknown = 1;
e92a7162 1181 }
91e13aa3 1182 }
4be44fcd 1183
91e13aa3
AL		 1184 acpi_video_device_bind(video, data);
1185 acpi_video_device_find_cap(data);
1da177e4 1186
91e13aa3
AL		 1187 mutex_lock(&video->device_list_lock);
1188 list_add_tail(&data->entry, &video->video_device_list);
1189 mutex_unlock(&video->device_list_lock);
1da177e4 1190
91e13aa3 1191 return status;
1da177e4
LT		 1192}
1193
1194/*
1195 * Arg:
21fcb34e 1196 * video : video bus device
1da177e4
LT		 1197 *
1198 * Return:
21fcb34e
FC		 1199 * none
1200 *
1201 * Enumerate the video device list of the video bus,
1da177e4
LT		 1202 * bind the ids with the corresponding video devices
1203 * under the video bus.
4be44fcd 1204 */
1da177e4 1205
4be44fcd 1206static void acpi_video_device_rebind(struct acpi_video_bus *video)
1da177e4 1207{
ff102ea9
DT		 1208 struct acpi_video_device *dev;
1209
bbac81f5 1210 mutex_lock(&video->device_list_lock);
ff102ea9
DT		 1211
1212 list_for_each_entry(dev, &video->video_device_list, entry)
4be44fcd 1213 acpi_video_device_bind(video, dev);
ff102ea9 1214
bbac81f5 1215 mutex_unlock(&video->device_list_lock);
1da177e4
LT		 1216}
1217
1218/*
1219 * Arg:
21fcb34e
FC		 1220 * video : video bus device
1221 * device : video output device under the video
1222 * bus
1da177e4
LT		 1223 *
1224 * Return:
21fcb34e
FC		 1225 * none
1226 *
1da177e4
LT		 1227 * Bind the ids with the corresponding video devices
1228 * under the video bus.
4be44fcd 1229 */
1da177e4
LT		 1230
1231static void
4be44fcd
LB		 1232acpi_video_device_bind(struct acpi_video_bus *video,
1233 struct acpi_video_device *device)
1da177e4 1234{
78eed028 1235 struct acpi_video_enumerated_device *ids;
4be44fcd 1236 int i;
1da177e4 1237
78eed028
DT		 1238 for (i = 0; i < video->attached_count; i++) {
1239 ids = &video->attached_array[i];
1240 if (device->device_id == (ids->value.int_val & 0xffff)) {
1241 ids->bind_info = device;
1da177e4
LT		 1242 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1243 }
1244 }
1da177e4
LT		 1245}
1246
1247/*
1248 * Arg:
21fcb34e 1249 * video : video bus device
1da177e4
LT		 1250 *
1251 * Return:
21fcb34e
FC		 1252 * < 0 : error
1253 *
1da177e4
LT		 1254 * Call _DOD to enumerate all devices attached to display adapter
1255 *
4be44fcd 1256 */
1da177e4
LT		 1257
1258static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1259{
4be44fcd
LB		 1260 int status;
1261 int count;
1262 int i;
78eed028 1263 struct acpi_video_enumerated_device *active_list;
4be44fcd
LB		 1264 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1265 union acpi_object *dod = NULL;
1266 union acpi_object *obj;
1da177e4 1267
90130268 1268 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1da177e4 1269 if (!ACPI_SUCCESS(status)) {
a6fc6720 1270 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
d550d98d 1271 return status;
1da177e4
LT		 1272 }
1273
50dd0969 1274 dod = buffer.pointer;
1da177e4 1275 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
a6fc6720 1276 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1da177e4
LT		 1277 status = -EFAULT;
1278 goto out;
1279 }
1280
1281 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
4be44fcd 1282 dod->package.count));
1da177e4 1283
78eed028
DT		 1284 active_list = kcalloc(1 + dod->package.count,
1285 sizeof(struct acpi_video_enumerated_device),
1286 GFP_KERNEL);
1287 if (!active_list) {
1da177e4
LT		 1288 status = -ENOMEM;
1289 goto out;
1290 }
1291
1292 count = 0;
1293 for (i = 0; i < dod->package.count; i++) {
50dd0969 1294 obj = &dod->package.elements[i];
1da177e4
LT		 1295
1296 if (obj->type != ACPI_TYPE_INTEGER) {
78eed028
DT		 1297 printk(KERN_ERR PREFIX
1298 "Invalid _DOD data in element %d\n", i);
1299 continue;
1da177e4 1300 }
78eed028
DT		 1301
1302 active_list[count].value.int_val = obj->integer.value;
1303 active_list[count].bind_info = NULL;
4be44fcd
LB		 1304 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1305 (int)obj->integer.value));
1da177e4
LT		 1306 count++;
1307 }
1da177e4 1308
6044ec88 1309 kfree(video->attached_array);
4be44fcd 1310
78eed028 1311 video->attached_array = active_list;
1da177e4 1312 video->attached_count = count;
78eed028 1313
915ea7e4 1314out:
02438d87 1315 kfree(buffer.pointer);
d550d98d 1316 return status;
1da177e4
LT		 1317}
1318
4be44fcd
LB		 1319static int
1320acpi_video_get_next_level(struct acpi_video_device *device,
1321 u32 level_current, u32 event)
1da177e4 1322{
63f0edfc 1323 int min, max, min_above, max_below, i, l, delta = 255;
f4715189
TT		 1324 max = max_below = 0;
1325 min = min_above = 255;
63f0edfc 1326 /* Find closest level to level_current */
0a3db1ce 1327 for (i = 2; i < device->brightness->count; i++) {
63f0edfc
AS		 1328 l = device->brightness->levels[i];
1329 if (abs(l - level_current) < abs(delta)) {
1330 delta = l - level_current;
1331 if (!delta)
1332 break;
1333 }
1334 }
1335 /* Ajust level_current to closest available level */
1336 level_current += delta;
0a3db1ce 1337 for (i = 2; i < device->brightness->count; i++) {
f4715189
TT		 1338 l = device->brightness->levels[i];
1339 if (l < min)
1340 min = l;
1341 if (l > max)
1342 max = l;
1343 if (l < min_above && l > level_current)
1344 min_above = l;
1345 if (l > max_below && l < level_current)
1346 max_below = l;
1347 }
1348
1349 switch (event) {
1350 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1351 return (level_current < max) ? min_above : min;
1352 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1353 return (level_current < max) ? min_above : max;
1354 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1355 return (level_current > min) ? max_below : min;
1356 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1357 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1358 return 0;
1359 default:
1360 return level_current;
1361 }
1da177e4
LT		 1362}
1363
c8890f90 1364static int
4be44fcd 1365acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1da177e4 1366{
27663c58 1367 unsigned long long level_current, level_next;
c8890f90
ZR		 1368 int result = -EINVAL;
1369
fbc9fe1b
AL		 1370 /* no warning message if acpi_backlight=vendor or a quirk is used */
1371 if (!acpi_video_verify_backlight_support())
28c32e99
ZR		 1372 return 0;
1373
469778c1 1374 if (!device->brightness)
c8890f90
ZR		 1375 goto out;
1376
1377 result = acpi_video_device_lcd_get_level_current(device,
a89803df
DB		 1378 &level_current,
1379 false);
c8890f90
ZR		 1380 if (result)
1381 goto out;
1382
1da177e4 1383 level_next = acpi_video_get_next_level(device, level_current, event);
c8890f90 1384
24450c7a 1385 result = acpi_video_device_lcd_set_level(device, level_next);
c8890f90 1386
36342742
MG		 1387 if (!result)
1388 backlight_force_update(device->backlight,
1389 BACKLIGHT_UPDATE_HOTKEY);
1390
c8890f90
ZR		 1391out:
1392 if (result)
1393 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1394
1395 return result;
1da177e4
LT		 1396}
1397
e92a7162
MG		 1398int acpi_video_get_edid(struct acpi_device *device, int type, int device_id,
1399 void **edid)
1400{
1401 struct acpi_video_bus *video;
1402 struct acpi_video_device *video_device;
1403 union acpi_object *buffer = NULL;
1404 acpi_status status;
1405 int i, length;
1406
1407 if (!device || !acpi_driver_data(device))
1408 return -EINVAL;
1409
1410 video = acpi_driver_data(device);
1411
1412 for (i = 0; i < video->attached_count; i++) {
1413 video_device = video->attached_array[i].bind_info;
1414 length = 256;
1415
1416 if (!video_device)
1417 continue;
1418
82069552
ZR		 1419 if (!video_device->cap._DDC)
1420 continue;
1421
e92a7162
MG		 1422 if (type) {
1423 switch (type) {
1424 case ACPI_VIDEO_DISPLAY_CRT:
1425 if (!video_device->flags.crt)
1426 continue;
1427 break;
1428 case ACPI_VIDEO_DISPLAY_TV:
1429 if (!video_device->flags.tvout)
1430 continue;
1431 break;
1432 case ACPI_VIDEO_DISPLAY_DVI:
1433 if (!video_device->flags.dvi)
1434 continue;
1435 break;
1436 case ACPI_VIDEO_DISPLAY_LCD:
1437 if (!video_device->flags.lcd)
1438 continue;
1439 break;
1440 }
1441 } else if (video_device->device_id != device_id) {
1442 continue;
1443 }
1444
1445 status = acpi_video_device_EDID(video_device, &buffer, length);
1446
1447 if (ACPI_FAILURE(status) || !buffer ||
1448 buffer->type != ACPI_TYPE_BUFFER) {
1449 length = 128;
1450 status = acpi_video_device_EDID(video_device, &buffer,
1451 length);
1452 if (ACPI_FAILURE(status) || !buffer ||
1453 buffer->type != ACPI_TYPE_BUFFER) {
1454 continue;
1455 }
1456 }
1457
1458 *edid = buffer->buffer.pointer;
1459 return length;
1460 }
1461
1462 return -ENODEV;
1463}
1464EXPORT_SYMBOL(acpi_video_get_edid);
1465
1da177e4 1466static int
4be44fcd
LB		 1467acpi_video_bus_get_devices(struct acpi_video_bus *video,
1468 struct acpi_device *device)
1da177e4 1469{
fba4e087 1470 int status = 0;
ff102ea9 1471 struct acpi_device *dev;
1da177e4 1472
fba4e087
IM		 1473 /*
1474 * There are systems where video module known to work fine regardless
1475 * of broken _DOD and ignoring returned value here doesn't cause
1476 * any issues later.
1477 */
1478 acpi_video_device_enumerate(video);
1da177e4 1479
ff102ea9 1480 list_for_each_entry(dev, &device->children, node) {
1da177e4
LT		 1481
1482 status = acpi_video_bus_get_one_device(dev, video);
ea9f8856 1483 if (status) {
91e13aa3
AL		 1484 dev_err(&dev->dev, "Can't attach device\n");
1485 break;
1da177e4 1486 }
1da177e4 1487 }
d550d98d 1488 return status;
1da177e4
LT		 1489}
1490
1da177e4
LT		 1491/* acpi_video interface */
1492
efaa14c7
AL		 1493/*
1494 * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't
1495 * preform any automatic brightness change on receiving a notification.
1496 */
4be44fcd 1497static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1da177e4 1498{
efaa14c7 1499 return acpi_video_bus_DOS(video, 0,
fbc9fe1b 1500 acpi_osi_is_win8() ? 1 : 0);
1da177e4
LT		 1501}
1502
4be44fcd 1503static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1da177e4 1504{
efaa14c7 1505 return acpi_video_bus_DOS(video, 0,
fbc9fe1b 1506 acpi_osi_is_win8() ? 0 : 1);
1da177e4
LT		 1507}
1508
7015558f 1509static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
1da177e4 1510{
7015558f 1511 struct acpi_video_bus *video = acpi_driver_data(device);
e9dab196 1512 struct input_dev *input;
17c452f9 1513 int keycode = 0;
e9dab196 1514
67b662e1 1515 if (!video || !video->input)
d550d98d 1516 return;
1da177e4 1517
e9dab196 1518 input = video->input;
1da177e4
LT		 1519
1520 switch (event) {
98fb8fe1 1521 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1da177e4 1522 * most likely via hotkey. */
8a37c65d 1523 keycode = KEY_SWITCHVIDEOMODE;
1da177e4
LT		 1524 break;
1525
98fb8fe1 1526 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1da177e4
LT		 1527 * connector. */
1528 acpi_video_device_enumerate(video);
1529 acpi_video_device_rebind(video);
e9dab196 1530 keycode = KEY_SWITCHVIDEOMODE;
1da177e4
LT		 1531 break;
1532
4be44fcd 1533 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
e9dab196
LY		 1534 keycode = KEY_SWITCHVIDEOMODE;
1535 break;
4be44fcd 1536 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
e9dab196
LY		 1537 keycode = KEY_VIDEO_NEXT;
1538 break;
4be44fcd 1539 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
e9dab196 1540 keycode = KEY_VIDEO_PREV;
1da177e4
LT		 1541 break;
1542
1543 default:
1544 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd 1545 "Unsupported event [0x%x]\n", event));
1da177e4
LT		 1546 break;
1547 }
1548
8a37c65d
LT		 1549 if (acpi_notifier_call_chain(device, event, 0))
1550 /* Something vetoed the keypress. */
1551 keycode = 0;
17c452f9
MG		 1552
1553 if (keycode) {
1554 input_report_key(input, keycode, 1);
1555 input_sync(input);
1556 input_report_key(input, keycode, 0);
1557 input_sync(input);
1558 }
e9dab196 1559
d550d98d 1560 return;
1da177e4
LT		 1561}
1562
4be44fcd 1563static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1da177e4 1564{
50dd0969 1565 struct acpi_video_device *video_device = data;
4be44fcd 1566 struct acpi_device *device = NULL;
e9dab196
LY		 1567 struct acpi_video_bus *bus;
1568 struct input_dev *input;
17c452f9 1569 int keycode = 0;
1da177e4 1570
1da177e4 1571 if (!video_device)
d550d98d 1572 return;
1da177e4 1573
e6afa0de 1574 device = video_device->dev;
e9dab196
LY		 1575 bus = video_device->video;
1576 input = bus->input;
1da177e4
LT		 1577
1578 switch (event) {
4be44fcd 1579 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
8a681a4d
ZR		 1580 if (brightness_switch_enabled)
1581 acpi_video_switch_brightness(video_device, event);
e9dab196
LY		 1582 keycode = KEY_BRIGHTNESS_CYCLE;
1583 break;
4be44fcd 1584 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
8a681a4d
ZR		 1585 if (brightness_switch_enabled)
1586 acpi_video_switch_brightness(video_device, event);
e9dab196
LY		 1587 keycode = KEY_BRIGHTNESSUP;
1588 break;
4be44fcd 1589 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
8a681a4d
ZR		 1590 if (brightness_switch_enabled)
1591 acpi_video_switch_brightness(video_device, event);
e9dab196
LY		 1592 keycode = KEY_BRIGHTNESSDOWN;
1593 break;
70f23fd6 1594 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */
8a681a4d
ZR		 1595 if (brightness_switch_enabled)
1596 acpi_video_switch_brightness(video_device, event);
e9dab196
LY		 1597 keycode = KEY_BRIGHTNESS_ZERO;
1598 break;
4be44fcd 1599 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
8a681a4d
ZR		 1600 if (brightness_switch_enabled)
1601 acpi_video_switch_brightness(video_device, event);
e9dab196 1602 keycode = KEY_DISPLAY_OFF;
1da177e4
LT		 1603 break;
1604 default:
1605 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd 1606 "Unsupported event [0x%x]\n", event));
1da177e4
LT		 1607 break;
1608 }
e9dab196 1609
7761f638 1610 acpi_notifier_call_chain(device, event, 0);
17c452f9
MG		 1611
1612 if (keycode) {
1613 input_report_key(input, keycode, 1);
1614 input_sync(input);
1615 input_report_key(input, keycode, 0);
1616 input_sync(input);
1617 }
e9dab196 1618
d550d98d 1619 return;
1da177e4
LT		 1620}
1621
ac7729da
RW		 1622static int acpi_video_resume(struct notifier_block *nb,
1623 unsigned long val, void *ign)
863c1490
MG		 1624{
1625 struct acpi_video_bus *video;
1626 struct acpi_video_device *video_device;
1627 int i;
1628
ac7729da
RW		 1629 switch (val) {
1630 case PM_HIBERNATION_PREPARE:
1631 case PM_SUSPEND_PREPARE:
1632 case PM_RESTORE_PREPARE:
1633 return NOTIFY_DONE;
1634 }
863c1490 1635
ac7729da
RW		 1636 video = container_of(nb, struct acpi_video_bus, pm_nb);
1637
1638 dev_info(&video->device->dev, "Restoring backlight state\n");
863c1490
MG		 1639
1640 for (i = 0; i < video->attached_count; i++) {
1641 video_device = video->attached_array[i].bind_info;
1642 if (video_device && video_device->backlight)
1643 acpi_video_set_brightness(video_device->backlight);
1644 }
ac7729da
RW		 1645
1646 return NOTIFY_OK;
863c1490
MG		 1647}
1648
c504f8cb
ZR		 1649static acpi_status
1650acpi_video_bus_match(acpi_handle handle, u32 level, void *context,
1651 void **return_value)
1652{
1653 struct acpi_device *device = context;
1654 struct acpi_device *sibling;
1655 int result;
1656
1657 if (handle == device->handle)
1658 return AE_CTRL_TERMINATE;
1659
1660 result = acpi_bus_get_device(handle, &sibling);
1661 if (result)
1662 return AE_OK;
1663
1664 if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME))
1665 return AE_ALREADY_EXISTS;
1666
1667 return AE_OK;
1668}
1669
67b662e1
AL		 1670static void acpi_video_dev_register_backlight(struct acpi_video_device *device)
1671{
99678ed7
HG		 1672 struct backlight_properties props;
1673 struct pci_dev *pdev;
1674 acpi_handle acpi_parent;
1675 struct device *parent = NULL;
1676 int result;
1677 static int count;
1678 char *name;
67b662e1 1679
99678ed7
HG		 1680 result = acpi_video_init_brightness(device);
1681 if (result)
1682 return;
1683 name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
1684 if (!name)
1685 return;
1686 count++;
67b662e1 1687
99678ed7 1688 acpi_get_parent(device->dev->handle, &acpi_parent);
67b662e1 1689
99678ed7
HG		 1690 pdev = acpi_get_pci_dev(acpi_parent);
1691 if (pdev) {
1692 parent = &pdev->dev;
1693 pci_dev_put(pdev);
1694 }
67b662e1 1695
99678ed7
HG		 1696 memset(&props, 0, sizeof(struct backlight_properties));
1697 props.type = BACKLIGHT_FIRMWARE;
1698 props.max_brightness = device->brightness->count - 3;
1699 device->backlight = backlight_device_register(name,
1700 parent,
1701 device,
1702 &acpi_backlight_ops,
1703 &props);
1704 kfree(name);
1705 if (IS_ERR(device->backlight))
1706 return;
67b662e1 1707
99678ed7
HG		 1708 /*
1709 * Save current brightness level in case we have to restore it
1710 * before acpi_video_device_lcd_set_level() is called next time.
1711 */
1712 device->backlight->props.brightness =
1713 acpi_video_get_brightness(device->backlight);
67b662e1 1714
99678ed7
HG		 1715 device->cooling_dev = thermal_cooling_device_register("LCD",
1716 device->dev, &video_cooling_ops);
1717 if (IS_ERR(device->cooling_dev)) {
1718 /*
1719 * Set cooling_dev to NULL so we don't crash trying to free it.
1720 * Also, why the hell we are returning early and not attempt to
1721 * register video output if cooling device registration failed?
1722 * -- dtor
1723 */
1724 device->cooling_dev = NULL;
1725 return;
67b662e1 1726 }
99678ed7
HG		 1727
1728 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
1729 device->cooling_dev->id);
1730 result = sysfs_create_link(&device->dev->dev.kobj,
1731 &device->cooling_dev->device.kobj,
1732 "thermal_cooling");
1733 if (result)
1734 printk(KERN_ERR PREFIX "Create sysfs link\n");
1735 result = sysfs_create_link(&device->cooling_dev->device.kobj,
1736 &device->dev->dev.kobj, "device");
1737 if (result)
1738 printk(KERN_ERR PREFIX "Create sysfs link\n");
67b662e1
AL		 1739}
1740
1741static int acpi_video_bus_register_backlight(struct acpi_video_bus *video)
1742{
1743 struct acpi_video_device *dev;
1744
53a92ba7
HG		 1745 if (video->backlight_registered)
1746 return 0;
1747
99678ed7
HG		 1748 if (!acpi_video_verify_backlight_support())
1749 return 0;
1750
67b662e1
AL		 1751 mutex_lock(&video->device_list_lock);
1752 list_for_each_entry(dev, &video->video_device_list, entry)
1753 acpi_video_dev_register_backlight(dev);
1754 mutex_unlock(&video->device_list_lock);
1755
99678ed7
HG		 1756 video->backlight_registered = true;
1757
67b662e1
AL		 1758 video->pm_nb.notifier_call = acpi_video_resume;
1759 video->pm_nb.priority = 0;
1760 return register_pm_notifier(&video->pm_nb);
1761}
1762
1763static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device)
1764{
1765 if (device->backlight) {
1766 backlight_device_unregister(device->backlight);
1767 device->backlight = NULL;
1768 }
1769 if (device->brightness) {
1770 kfree(device->brightness->levels);
1771 kfree(device->brightness);
1772 device->brightness = NULL;
1773 }
1774 if (device->cooling_dev) {
1775 sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling");
1776 sysfs_remove_link(&device->cooling_dev->device.kobj, "device");
1777 thermal_cooling_device_unregister(device->cooling_dev);
1778 device->cooling_dev = NULL;
1779 }
1780}
1781
1782static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video)
1783{
1784 struct acpi_video_device *dev;
99678ed7
HG		 1785 int error;
1786
1787 if (!video->backlight_registered)
1788 return 0;
1789
1790 error = unregister_pm_notifier(&video->pm_nb);
67b662e1
AL		 1791
1792 mutex_lock(&video->device_list_lock);
1793 list_for_each_entry(dev, &video->video_device_list, entry)
1794 acpi_video_dev_unregister_backlight(dev);
1795 mutex_unlock(&video->device_list_lock);
1796
99678ed7
HG		 1797 video->backlight_registered = false;
1798
67b662e1
AL		 1799 return error;
1800}
1801
1802static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device)
1803{
1804 acpi_status status;
1805 struct acpi_device *adev = device->dev;
1806
1807 status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,
1808 acpi_video_device_notify, device);
1809 if (ACPI_FAILURE(status))
1810 dev_err(&adev->dev, "Error installing notify handler\n");
1811 else
1812 device->flags.notify = 1;
1813}
1814
1815static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video)
1816{
1817 struct input_dev *input;
1818 struct acpi_video_device *dev;
1819 int error;
1820
1821 video->input = input = input_allocate_device();
1822 if (!input) {
1823 error = -ENOMEM;
1824 goto out;
1825 }
1826
1827 error = acpi_video_bus_start_devices(video);
1828 if (error)
1829 goto err_free_input;
1830
1831 snprintf(video->phys, sizeof(video->phys),
1832 "%s/video/input0", acpi_device_hid(video->device));
1833
1834 input->name = acpi_device_name(video->device);
1835 input->phys = video->phys;
1836 input->id.bustype = BUS_HOST;
1837 input->id.product = 0x06;
1838 input->dev.parent = &video->device->dev;
1839 input->evbit[0] = BIT(EV_KEY);
1840 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
1841 set_bit(KEY_VIDEO_NEXT, input->keybit);
1842 set_bit(KEY_VIDEO_PREV, input->keybit);
1843 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
1844 set_bit(KEY_BRIGHTNESSUP, input->keybit);
1845 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
1846 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
1847 set_bit(KEY_DISPLAY_OFF, input->keybit);
1848
1849 error = input_register_device(input);
1850 if (error)
1851 goto err_stop_dev;
1852
1853 mutex_lock(&video->device_list_lock);
1854 list_for_each_entry(dev, &video->video_device_list, entry)
1855 acpi_video_dev_add_notify_handler(dev);
1856 mutex_unlock(&video->device_list_lock);
1857
1858 return 0;
1859
1860err_stop_dev:
1861 acpi_video_bus_stop_devices(video);
1862err_free_input:
1863 input_free_device(input);
1864 video->input = NULL;
1865out:
1866 return error;
1867}
1868
1869static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev)
1870{
1871 if (dev->flags.notify) {
1872 acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY,
1873 acpi_video_device_notify);
1874 dev->flags.notify = 0;
1875 }
1876}
1877
1878static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video)
1879{
1880 struct acpi_video_device *dev;
1881
1882 mutex_lock(&video->device_list_lock);
1883 list_for_each_entry(dev, &video->video_device_list, entry)
1884 acpi_video_dev_remove_notify_handler(dev);
1885 mutex_unlock(&video->device_list_lock);
1886
1887 acpi_video_bus_stop_devices(video);
1888 input_unregister_device(video->input);
1889 video->input = NULL;
1890}
1891
53a92ba7
HG		 1892static int acpi_video_backlight_notify(struct notifier_block *nb,
1893 unsigned long val, void *bd)
1894{
1895 struct backlight_device *backlight = bd;
1896 struct acpi_video_bus *video;
1897
1898 /* acpi_video_verify_backlight_support only cares about raw devices */
1899 if (backlight->props.type != BACKLIGHT_RAW)
1900 return NOTIFY_DONE;
1901
1902 video = container_of(nb, struct acpi_video_bus, backlight_nb);
1903
1904 switch (val) {
1905 case BACKLIGHT_REGISTERED:
1906 if (!acpi_video_verify_backlight_support())
1907 acpi_video_bus_unregister_backlight(video);
1908 break;
1909 case BACKLIGHT_UNREGISTERED:
1910 acpi_video_bus_register_backlight(video);
1911 break;
1912 }
1913
1914 return NOTIFY_OK;
1915}
1916
1917static int acpi_video_bus_add_backlight_notify_handler(
1918 struct acpi_video_bus *video)
1919{
1920 int error;
1921
1922 video->backlight_nb.notifier_call = acpi_video_backlight_notify;
1923 video->backlight_nb.priority = 0;
1924 error = backlight_register_notifier(&video->backlight_nb);
1925 if (error == 0)
1926 video->backlight_notifier_registered = true;
1927
1928 return error;
1929}
1930
1931static int acpi_video_bus_remove_backlight_notify_handler(
1932 struct acpi_video_bus *video)
1933{
1934 if (!video->backlight_notifier_registered)
1935 return 0;
1936
1937 video->backlight_notifier_registered = false;
1938
1939 return backlight_unregister_notifier(&video->backlight_nb);
1940}
1941
67b662e1
AL		 1942static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1943{
1944 struct acpi_video_device *dev, *next;
1945
1946 mutex_lock(&video->device_list_lock);
1947 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1948 list_del(&dev->entry);
1949 kfree(dev);
1950 }
1951 mutex_unlock(&video->device_list_lock);
1952
1953 return 0;
1954}
1955
ac7729da
RW		 1956static int instance;
1957
4be44fcd 1958static int acpi_video_bus_add(struct acpi_device *device)
1da177e4 1959{
f51e8391 1960 struct acpi_video_bus *video;
f51e8391 1961 int error;
c504f8cb
ZR		 1962 acpi_status status;
1963
1964 status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
1965 device->parent->handle, 1,
1966 acpi_video_bus_match, NULL,
1967 device, NULL);
1968 if (status == AE_ALREADY_EXISTS) {
1969 printk(KERN_WARNING FW_BUG
1970 "Duplicate ACPI video bus devices for the"
1971 " same VGA controller, please try module "
1972 "parameter \"video.allow_duplicates=1\""
1973 "if the current driver doesn't work.\n");
1974 if (!allow_duplicates)
1975 return -ENODEV;
1976 }
1da177e4 1977
36bcbec7 1978 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1da177e4 1979 if (!video)
d550d98d 1980 return -ENOMEM;
1da177e4 1981
e6d9da1d
ZR		 1982 /* a hack to fix the duplicate name "VID" problem on T61 */
1983 if (!strcmp(device->pnp.bus_id, "VID")) {
1984 if (instance)
1985 device->pnp.bus_id[3] = '0' + instance;
915ea7e4 1986 instance++;
e6d9da1d 1987 }
f3b39f13
ZY		 1988 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
1989 if (!strcmp(device->pnp.bus_id, "VGA")) {
1990 if (instance)
1991 device->pnp.bus_id[3] = '0' + instance;
1992 instance++;
1993 }
e6d9da1d 1994
e6afa0de 1995 video->device = device;
1da177e4
LT		 1996 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1997 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
db89b4f0 1998 device->driver_data = video;
1da177e4
LT		 1999
2000 acpi_video_bus_find_cap(video);
f51e8391
DT		 2001 error = acpi_video_bus_check(video);
2002 if (error)
2003 goto err_free_video;
1da177e4 2004
bbac81f5 2005 mutex_init(&video->device_list_lock);
1da177e4
LT		 2006 INIT_LIST_HEAD(&video->video_device_list);
2007
ea9f8856
IM		 2008 error = acpi_video_bus_get_devices(video, device);
2009 if (error)
91e13aa3 2010 goto err_put_video;
1da177e4 2011
1da177e4 2012 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
4be44fcd
LB		 2013 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2014 video->flags.multihead ? "yes" : "no",
2015 video->flags.rom ? "yes" : "no",
2016 video->flags.post ? "yes" : "no");
67b662e1
AL		 2017 mutex_lock(&video_list_lock);
2018 list_add_tail(&video->entry, &video_bus_head);
2019 mutex_unlock(&video_list_lock);
1da177e4 2020
67b662e1
AL		 2021 acpi_video_bus_register_backlight(video);
2022 acpi_video_bus_add_notify_handler(video);
53a92ba7 2023 acpi_video_bus_add_backlight_notify_handler(video);
ac7729da 2024
f51e8391
DT		 2025 return 0;
2026
67b662e1 2027err_put_video:
f51e8391
DT		 2028 acpi_video_bus_put_devices(video);
2029 kfree(video->attached_array);
67b662e1 2030err_free_video:
f51e8391 2031 kfree(video);
db89b4f0 2032 device->driver_data = NULL;
1da177e4 2033
f51e8391 2034 return error;
1da177e4
LT		 2035}
2036
51fac838 2037static int acpi_video_bus_remove(struct acpi_device *device)
1da177e4 2038{
4be44fcd 2039 struct acpi_video_bus *video = NULL;
1da177e4 2040
1da177e4
LT		 2041
2042 if (!device || !acpi_driver_data(device))
d550d98d 2043 return -EINVAL;
1da177e4 2044
50dd0969 2045 video = acpi_driver_data(device);
1da177e4 2046
53a92ba7 2047 acpi_video_bus_remove_backlight_notify_handler(video);
67b662e1
AL		 2048 acpi_video_bus_remove_notify_handler(video);
2049 acpi_video_bus_unregister_backlight(video);
1da177e4 2050 acpi_video_bus_put_devices(video);
1da177e4 2051
67b662e1
AL		 2052 mutex_lock(&video_list_lock);
2053 list_del(&video->entry);
2054 mutex_unlock(&video_list_lock);
2055
6044ec88 2056 kfree(video->attached_array);
1da177e4
LT		 2057 kfree(video);
2058
d550d98d 2059 return 0;
1da177e4
LT		 2060}
2061
c6996bdd
AC		 2062static int __init is_i740(struct pci_dev *dev)
2063{
2064 if (dev->device == 0x00D1)
2065 return 1;
2066 if (dev->device == 0x7000)
2067 return 1;
2068 return 0;
2069}
2070
74a365b3
MG		 2071static int __init intel_opregion_present(void)
2072{
c6996bdd 2073 int opregion = 0;
74a365b3
MG		 2074 struct pci_dev *dev = NULL;
2075 u32 address;
2076
2077 for_each_pci_dev(dev) {
2078 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2079 continue;
2080 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2081 continue;
c6996bdd
AC		 2082 /* We don't want to poke around undefined i740 registers */
2083 if (is_i740(dev))
2084 continue;
74a365b3
MG		 2085 pci_read_config_dword(dev, 0xfc, &address);
2086 if (!address)
2087 continue;
c6996bdd 2088 opregion = 1;
74a365b3 2089 }
c6996bdd 2090 return opregion;
74a365b3
MG		 2091}
2092
8e5c2b77 2093int acpi_video_register(void)
1da177e4 2094{
8e5c2b77 2095 int result = 0;
86e437f0
ZY		 2096 if (register_count) {
2097 /*
8e5c2b77
RW		 2098 * if the function of acpi_video_register is already called,
2099 * don't register the acpi_vide_bus again and return no error.
86e437f0
ZY		 2100 */
2101 return 0;
2102 }
1da177e4 2103
67b662e1
AL		 2104 mutex_init(&video_list_lock);
2105 INIT_LIST_HEAD(&video_bus_head);
2106
1da177e4 2107 result = acpi_bus_register_driver(&acpi_video_bus);
39fe394d 2108 if (result < 0)
d550d98d 2109 return -ENODEV;
1da177e4 2110
86e437f0
ZY		 2111 /*
2112 * When the acpi_video_bus is loaded successfully, increase
2113 * the counter reference.
2114 */
2115 register_count = 1;
2116
d550d98d 2117 return 0;
1da177e4 2118}
8e5c2b77 2119EXPORT_SYMBOL(acpi_video_register);
74a365b3 2120
86e437f0
ZY		 2121void acpi_video_unregister(void)
2122{
2123 if (!register_count) {
2124 /*
2125 * If the acpi video bus is already unloaded, don't
2126 * unload it again and return directly.
2127 */
2128 return;
2129 }
2130 acpi_bus_unregister_driver(&acpi_video_bus);
2131
86e437f0
ZY		 2132 register_count = 0;
2133
2134 return;
2135}
2136EXPORT_SYMBOL(acpi_video_unregister);
2137
1b7f37e1
HG		 2138void acpi_video_unregister_backlight(void)
2139{
2140 struct acpi_video_bus *video;
2141
2142 if (!register_count)
2143 return;
2144
2145 mutex_lock(&video_list_lock);
2146 list_for_each_entry(video, &video_bus_head, entry)
2147 acpi_video_bus_unregister_backlight(video);
2148 mutex_unlock(&video_list_lock);
2149}
2150EXPORT_SYMBOL(acpi_video_unregister_backlight);
2151
74a365b3
MG		 2152/*
2153 * This is kind of nasty. Hardware using Intel chipsets may require
2154 * the video opregion code to be run first in order to initialise
2155 * state before any ACPI video calls are made. To handle this we defer
2156 * registration of the video class until the opregion code has run.
2157 */
2158
2159static int __init acpi_video_init(void)
2160{
45cb50e6
ZR		 2161 dmi_check_system(video_dmi_table);
2162
74a365b3
MG		 2163 if (intel_opregion_present())
2164 return 0;
2165
2166 return acpi_video_register();
2167}
1da177e4 2168
86e437f0 2169static void __exit acpi_video_exit(void)
1da177e4 2170{
86e437f0 2171 acpi_video_unregister();
1da177e4 2172
d550d98d 2173 return;
1da177e4
LT		 2174}
2175
2176module_init(acpi_video_init);
2177module_exit(acpi_video_exit);
Linux kernel - Deliverables
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