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ACPI video: ignore buggy _BQC
[deliverable/linux.git] / drivers / acpi / video.c
CommitLineData
1da177e4
LT		 1/*
2 * video.c - ACPI Video Driver ($Revision:$)
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>
1da177e4
LT		 33#include <linux/proc_fs.h>
34#include <linux/seq_file.h>
e9dab196 35#include <linux/input.h>
2f3d000a 36#include <linux/backlight.h>
702ed512 37#include <linux/thermal.h>
23b0f015 38#include <linux/video_output.h>
935e5f29 39#include <linux/sort.h>
74a365b3
MG		 40#include <linux/pci.h>
41#include <linux/pci_ids.h>
1da177e4
LT		 42#include <asm/uaccess.h>
43
44#include <acpi/acpi_bus.h>
45#include <acpi/acpi_drivers.h>
46
1da177e4 47#define ACPI_VIDEO_CLASS "video"
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
82cae999
RZ		 64#define ACPI_VIDEO_DISPLAY_CRT 1
65#define ACPI_VIDEO_DISPLAY_TV 2
66#define ACPI_VIDEO_DISPLAY_DVI 3
67#define ACPI_VIDEO_DISPLAY_LCD 4
68
1da177e4 69#define _COMPONENT ACPI_VIDEO_COMPONENT
f52fd66d 70ACPI_MODULE_NAME("video");
1da177e4 71
f52fd66d 72MODULE_AUTHOR("Bruno Ducrot");
7cda93e0 73MODULE_DESCRIPTION("ACPI Video Driver");
1da177e4
LT		 74MODULE_LICENSE("GPL");
75
8a681a4d
ZR		 76static int brightness_switch_enabled = 1;
77module_param(brightness_switch_enabled, bool, 0644);
78
86e437f0 79static int register_count = 0;
4be44fcd
LB		 80static int acpi_video_bus_add(struct acpi_device *device);
81static int acpi_video_bus_remove(struct acpi_device *device, int type);
863c1490 82static int acpi_video_resume(struct acpi_device *device);
7015558f 83static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
1da177e4 84
1ba90e3a
TR		 85static const struct acpi_device_id video_device_ids[] = {
86 {ACPI_VIDEO_HID, 0},
87 {"", 0},
88};
89MODULE_DEVICE_TABLE(acpi, video_device_ids);
90
1da177e4 91static struct acpi_driver acpi_video_bus = {
c2b6705b 92 .name = "video",
1da177e4 93 .class = ACPI_VIDEO_CLASS,
1ba90e3a 94 .ids = video_device_ids,
1da177e4
LT		 95 .ops = {
96 .add = acpi_video_bus_add,
97 .remove = acpi_video_bus_remove,
863c1490 98 .resume = acpi_video_resume,
7015558f 99 .notify = acpi_video_bus_notify,
4be44fcd 100 },
1da177e4
LT		 101};
102
103struct acpi_video_bus_flags {
4be44fcd
LB		 104 u8 multihead:1; /* can switch video heads */
105 u8 rom:1; /* can retrieve a video rom */
106 u8 post:1; /* can configure the head to */
107 u8 reserved:5;
1da177e4
LT		 108};
109
110struct acpi_video_bus_cap {
4be44fcd
LB		 111 u8 _DOS:1; /*Enable/Disable output switching */
112 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
113 u8 _ROM:1; /*Get ROM Data */
114 u8 _GPD:1; /*Get POST Device */
115 u8 _SPD:1; /*Set POST Device */
116 u8 _VPO:1; /*Video POST Options */
117 u8 reserved:2;
1da177e4
LT		 118};
119
4be44fcd
LB		 120struct acpi_video_device_attrib {
121 u32 display_index:4; /* A zero-based instance of the Display */
98fb8fe1 122 u32 display_port_attachment:4; /*This field differentiates the display type */
4be44fcd 123 u32 display_type:4; /*Describe the specific type in use */
98fb8fe1 124 u32 vendor_specific:4; /*Chipset Vendor Specific */
4be44fcd
LB		 125 u32 bios_can_detect:1; /*BIOS can detect the device */
126 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
127 the VGA device. */
128 u32 pipe_id:3; /*For VGA multiple-head devices. */
129 u32 reserved:10; /*Must be 0 */
130 u32 device_id_scheme:1; /*Device ID Scheme */
1da177e4
LT		 131};
132
133struct acpi_video_enumerated_device {
134 union {
135 u32 int_val;
4be44fcd 136 struct acpi_video_device_attrib attrib;
1da177e4
LT		 137 } value;
138 struct acpi_video_device *bind_info;
139};
140
141struct acpi_video_bus {
e6afa0de 142 struct acpi_device *device;
4be44fcd 143 u8 dos_setting;
1da177e4 144 struct acpi_video_enumerated_device *attached_array;
4be44fcd
LB		 145 u8 attached_count;
146 struct acpi_video_bus_cap cap;
1da177e4 147 struct acpi_video_bus_flags flags;
4be44fcd 148 struct list_head video_device_list;
bbac81f5 149 struct mutex device_list_lock; /* protects video_device_list */
4be44fcd 150 struct proc_dir_entry *dir;
e9dab196
LY		 151 struct input_dev *input;
152 char phys[32]; /* for input device */
1da177e4
LT		 153};
154
155struct acpi_video_device_flags {
4be44fcd
LB		 156 u8 crt:1;
157 u8 lcd:1;
158 u8 tvout:1;
82cae999 159 u8 dvi:1;
4be44fcd
LB		 160 u8 bios:1;
161 u8 unknown:1;
82cae999 162 u8 reserved:2;
1da177e4
LT		 163};
164
165struct acpi_video_device_cap {
4be44fcd
LB		 166 u8 _ADR:1; /*Return the unique ID */
167 u8 _BCL:1; /*Query list of brightness control levels supported */
168 u8 _BCM:1; /*Set the brightness level */
2f3d000a 169 u8 _BQC:1; /* Get current brightness level */
c60d638e 170 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
4be44fcd
LB		 171 u8 _DDC:1; /*Return the EDID for this device */
172 u8 _DCS:1; /*Return status of output device */
173 u8 _DGS:1; /*Query graphics state */
174 u8 _DSS:1; /*Device state set */
1da177e4
LT		 175};
176
d32f6947
ZR		 177struct acpi_video_brightness_flags {
178 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
d80fb99f 179 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
1a7c618a
ZR		 180 u8 _BCL_use_index:1; /* levels in _BCL are index values */
181 u8 _BCM_use_index:1; /* input of _BCM is an index value */
182 u8 _BQC_use_index:1; /* _BQC returns an index value */
d32f6947
ZR		 183};
184
1da177e4 185struct acpi_video_device_brightness {
4be44fcd
LB		 186 int curr;
187 int count;
188 int *levels;
d32f6947 189 struct acpi_video_brightness_flags flags;
1da177e4
LT		 190};
191
192struct acpi_video_device {
4be44fcd
LB		 193 unsigned long device_id;
194 struct acpi_video_device_flags flags;
195 struct acpi_video_device_cap cap;
196 struct list_head entry;
197 struct acpi_video_bus *video;
198 struct acpi_device *dev;
1da177e4 199 struct acpi_video_device_brightness *brightness;
2f3d000a 200 struct backlight_device *backlight;
702ed512 201 struct thermal_cooling_device *cdev;
23b0f015 202 struct output_device *output_dev;
1da177e4
LT		 203};
204
1da177e4
LT		 205/* bus */
206static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
070d8eb1 207static const struct file_operations acpi_video_bus_info_fops = {
cf7acfab 208 .owner = THIS_MODULE,
4be44fcd
LB		 209 .open = acpi_video_bus_info_open_fs,
210 .read = seq_read,
211 .llseek = seq_lseek,
212 .release = single_release,
1da177e4
LT		 213};
214
215static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
070d8eb1 216static const struct file_operations acpi_video_bus_ROM_fops = {
cf7acfab 217 .owner = THIS_MODULE,
4be44fcd
LB		 218 .open = acpi_video_bus_ROM_open_fs,
219 .read = seq_read,
220 .llseek = seq_lseek,
221 .release = single_release,
1da177e4
LT		 222};
223
4be44fcd
LB		 224static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
225 struct file *file);
070d8eb1 226static const struct file_operations acpi_video_bus_POST_info_fops = {
cf7acfab 227 .owner = THIS_MODULE,
4be44fcd
LB		 228 .open = acpi_video_bus_POST_info_open_fs,
229 .read = seq_read,
230 .llseek = seq_lseek,
231 .release = single_release,
1da177e4
LT		 232};
233
234static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
c07c9a78 235static ssize_t acpi_video_bus_write_POST(struct file *file,
b7171ae7
JE		 236 const char __user *buffer, size_t count, loff_t *data);
237static const struct file_operations acpi_video_bus_POST_fops = {
cf7acfab 238 .owner = THIS_MODULE,
4be44fcd
LB		 239 .open = acpi_video_bus_POST_open_fs,
240 .read = seq_read,
b7171ae7 241 .write = acpi_video_bus_write_POST,
4be44fcd
LB		 242 .llseek = seq_lseek,
243 .release = single_release,
1da177e4
LT		 244};
245
1da177e4 246static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
c07c9a78 247static ssize_t acpi_video_bus_write_DOS(struct file *file,
b7171ae7
JE		 248 const char __user *buffer, size_t count, loff_t *data);
249static const struct file_operations acpi_video_bus_DOS_fops = {
cf7acfab 250 .owner = THIS_MODULE,
4be44fcd
LB		 251 .open = acpi_video_bus_DOS_open_fs,
252 .read = seq_read,
b7171ae7 253 .write = acpi_video_bus_write_DOS,
4be44fcd
LB		 254 .llseek = seq_lseek,
255 .release = single_release,
1da177e4
LT		 256};
257
258/* device */
4be44fcd
LB		 259static int acpi_video_device_info_open_fs(struct inode *inode,
260 struct file *file);
070d8eb1 261static const struct file_operations acpi_video_device_info_fops = {
cf7acfab 262 .owner = THIS_MODULE,
4be44fcd
LB		 263 .open = acpi_video_device_info_open_fs,
264 .read = seq_read,
265 .llseek = seq_lseek,
266 .release = single_release,
1da177e4
LT		 267};
268
4be44fcd
LB		 269static int acpi_video_device_state_open_fs(struct inode *inode,
270 struct file *file);
c07c9a78 271static ssize_t acpi_video_device_write_state(struct file *file,
b7171ae7
JE		 272 const char __user *buffer, size_t count, loff_t *data);
273static const struct file_operations acpi_video_device_state_fops = {
cf7acfab 274 .owner = THIS_MODULE,
4be44fcd
LB		 275 .open = acpi_video_device_state_open_fs,
276 .read = seq_read,
b7171ae7 277 .write = acpi_video_device_write_state,
4be44fcd
LB		 278 .llseek = seq_lseek,
279 .release = single_release,
1da177e4
LT		 280};
281
4be44fcd
LB		 282static int acpi_video_device_brightness_open_fs(struct inode *inode,
283 struct file *file);
c07c9a78 284static ssize_t acpi_video_device_write_brightness(struct file *file,
b7171ae7 285 const char __user *buffer, size_t count, loff_t *data);
1da177e4 286static struct file_operations acpi_video_device_brightness_fops = {
cf7acfab 287 .owner = THIS_MODULE,
4be44fcd
LB		 288 .open = acpi_video_device_brightness_open_fs,
289 .read = seq_read,
b7171ae7 290 .write = acpi_video_device_write_brightness,
4be44fcd
LB		 291 .llseek = seq_lseek,
292 .release = single_release,
1da177e4
LT		 293};
294
4be44fcd
LB		 295static int acpi_video_device_EDID_open_fs(struct inode *inode,
296 struct file *file);
070d8eb1 297static const struct file_operations acpi_video_device_EDID_fops = {
cf7acfab 298 .owner = THIS_MODULE,
4be44fcd
LB		 299 .open = acpi_video_device_EDID_open_fs,
300 .read = seq_read,
301 .llseek = seq_lseek,
302 .release = single_release,
1da177e4
LT		 303};
304
b7171ae7 305static const char device_decode[][30] = {
1da177e4
LT		 306 "motherboard VGA device",
307 "PCI VGA device",
308 "AGP VGA device",
309 "UNKNOWN",
310};
311
4be44fcd
LB		 312static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
313static void acpi_video_device_rebind(struct acpi_video_bus *video);
314static void acpi_video_device_bind(struct acpi_video_bus *video,
315 struct acpi_video_device *device);
1da177e4 316static int acpi_video_device_enumerate(struct acpi_video_bus *video);
2f3d000a
YL		 317static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
318 int level);
319static int acpi_video_device_lcd_get_level_current(
320 struct acpi_video_device *device,
27663c58 321 unsigned long long *level);
4be44fcd
LB		 322static int acpi_video_get_next_level(struct acpi_video_device *device,
323 u32 level_current, u32 event);
c8890f90 324static int acpi_video_switch_brightness(struct acpi_video_device *device,
4be44fcd 325 int event);
23b0f015 326static int acpi_video_device_get_state(struct acpi_video_device *device,
27663c58 327 unsigned long long *state);
23b0f015
LY		 328static int acpi_video_output_get(struct output_device *od);
329static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
1da177e4 330
2f3d000a
YL		 331/*backlight device sysfs support*/
332static int acpi_video_get_brightness(struct backlight_device *bd)
333{
27663c58 334 unsigned long long cur_level;
38531e6f 335 int i;
2f3d000a 336 struct acpi_video_device *vd =
655bfd7a 337 (struct acpi_video_device *)bl_get_data(bd);
c8890f90
ZR		 338
339 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
340 return -EINVAL;
38531e6f
MG		 341 for (i = 2; i < vd->brightness->count; i++) {
342 if (vd->brightness->levels[i] == cur_level)
343 /* The first two entries are special - see page 575
344 of the ACPI spec 3.0 */
345 return i-2;
346 }
347 return 0;
2f3d000a
YL		 348}
349
350static int acpi_video_set_brightness(struct backlight_device *bd)
351{
24450c7a 352 int request_level = bd->props.brightness + 2;
2f3d000a 353 struct acpi_video_device *vd =
655bfd7a 354 (struct acpi_video_device *)bl_get_data(bd);
24450c7a
ZR		 355
356 return acpi_video_device_lcd_set_level(vd,
357 vd->brightness->levels[request_level]);
2f3d000a
YL		 358}
359
599a52d1
RP		 360static struct backlight_ops acpi_backlight_ops = {
361 .get_brightness = acpi_video_get_brightness,
362 .update_status = acpi_video_set_brightness,
363};
364
23b0f015
LY		 365/*video output device sysfs support*/
366static int acpi_video_output_get(struct output_device *od)
367{
27663c58 368 unsigned long long state;
23b0f015 369 struct acpi_video_device *vd =
60043428 370 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
23b0f015
LY		 371 acpi_video_device_get_state(vd, &state);
372 return (int)state;
373}
374
375static int acpi_video_output_set(struct output_device *od)
376{
377 unsigned long state = od->request_state;
378 struct acpi_video_device *vd=
60043428 379 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
23b0f015
LY		 380 return acpi_video_device_set_state(vd, state);
381}
382
383static struct output_properties acpi_output_properties = {
384 .set_state = acpi_video_output_set,
385 .get_status = acpi_video_output_get,
386};
702ed512
ZR		 387
388
389/* thermal cooling device callbacks */
6503e5df
MG		 390static int video_get_max_state(struct thermal_cooling_device *cdev, unsigned
391 long *state)
702ed512
ZR		 392{
393 struct acpi_device *device = cdev->devdata;
394 struct acpi_video_device *video = acpi_driver_data(device);
395
6503e5df
MG		 396 *state = video->brightness->count - 3;
397 return 0;
702ed512
ZR		 398}
399
6503e5df
MG		 400static int video_get_cur_state(struct thermal_cooling_device *cdev, unsigned
401 long *state)
702ed512
ZR		 402{
403 struct acpi_device *device = cdev->devdata;
404 struct acpi_video_device *video = acpi_driver_data(device);
27663c58 405 unsigned long long level;
6503e5df 406 int offset;
702ed512 407
c8890f90
ZR		 408 if (acpi_video_device_lcd_get_level_current(video, &level))
409 return -EINVAL;
6503e5df
MG		 410 for (offset = 2; offset < video->brightness->count; offset++)
411 if (level == video->brightness->levels[offset]) {
412 *state = video->brightness->count - offset - 1;
413 return 0;
414 }
702ed512
ZR		 415
416 return -EINVAL;
417}
418
419static int
6503e5df 420video_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
702ed512
ZR		 421{
422 struct acpi_device *device = cdev->devdata;
423 struct acpi_video_device *video = acpi_driver_data(device);
424 int level;
425
426 if ( state >= video->brightness->count - 2)
427 return -EINVAL;
428
429 state = video->brightness->count - state;
430 level = video->brightness->levels[state -1];
431 return acpi_video_device_lcd_set_level(video, level);
432}
433
434static struct thermal_cooling_device_ops video_cooling_ops = {
435 .get_max_state = video_get_max_state,
436 .get_cur_state = video_get_cur_state,
437 .set_cur_state = video_set_cur_state,
438};
439
1da177e4
LT		 440/* --------------------------------------------------------------------------
441 Video Management
442 -------------------------------------------------------------------------- */
443
444/* device */
445
446static int
27663c58 447acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
1da177e4 448{
4be44fcd 449 int status;
90130268
PM		 450
451 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
1da177e4 452
d550d98d 453 return status;
1da177e4
LT		 454}
455
456static int
4be44fcd 457acpi_video_device_get_state(struct acpi_video_device *device,
27663c58 458 unsigned long long *state)
1da177e4 459{
4be44fcd 460 int status;
1da177e4 461
90130268 462 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
1da177e4 463
d550d98d 464 return status;
1da177e4
LT		 465}
466
467static int
4be44fcd 468acpi_video_device_set_state(struct acpi_video_device *device, int state)
1da177e4 469{
4be44fcd
LB		 470 int status;
471 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
472 struct acpi_object_list args = { 1, &arg0 };
27663c58 473 unsigned long long ret;
1da177e4 474
1da177e4
LT		 475
476 arg0.integer.value = state;
90130268 477 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
1da177e4 478
d550d98d 479 return status;
1da177e4
LT		 480}
481
482static int
4be44fcd
LB		 483acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
484 union acpi_object **levels)
1da177e4 485{
4be44fcd
LB		 486 int status;
487 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
488 union acpi_object *obj;
1da177e4 489
1da177e4
LT		 490
491 *levels = NULL;
492
90130268 493 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
1da177e4 494 if (!ACPI_SUCCESS(status))
d550d98d 495 return status;
4be44fcd 496 obj = (union acpi_object *)buffer.pointer;
6665bda7 497 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6468463a 498 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
1da177e4
LT		 499 status = -EFAULT;
500 goto err;
501 }
502
503 *levels = obj;
504
d550d98d 505 return 0;
1da177e4 506
4be44fcd 507 err:
6044ec88 508 kfree(buffer.pointer);
1da177e4 509
d550d98d 510 return status;
1da177e4
LT		 511}
512
513static int
4be44fcd 514acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
1da177e4 515{
24450c7a 516 int status;
4be44fcd
LB		 517 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
518 struct acpi_object_list args = { 1, &arg0 };
9e6dada9 519 int state;
1da177e4 520
1da177e4 521 arg0.integer.value = level;
1da177e4 522
24450c7a
ZR		 523 status = acpi_evaluate_object(device->dev->handle, "_BCM",
524 &args, NULL);
525 if (ACPI_FAILURE(status)) {
526 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
527 return -EIO;
528 }
529
4500ca8e 530 device->brightness->curr = level;
9e6dada9 531 for (state = 2; state < device->brightness->count; state++)
24450c7a 532 if (level == device->brightness->levels[state]) {
1a7c618a
ZR		 533 if (device->backlight)
534 device->backlight->props.brightness = state - 2;
24450c7a
ZR		 535 return 0;
536 }
9e6dada9 537
24450c7a
ZR		 538 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
539 return -EINVAL;
1da177e4
LT		 540}
541
45cb50e6
ZR		 542/*
543 * For some buggy _BQC methods, we need to add a constant value to
544 * the _BQC return value to get the actual current brightness level
545 */
546
547static int bqc_offset_aml_bug_workaround;
548static int __init video_set_bqc_offset(const struct dmi_system_id *d)
549{
550 bqc_offset_aml_bug_workaround = 9;
551 return 0;
552}
553
554static struct dmi_system_id video_dmi_table[] __initdata = {
555 /*
556 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
557 */
558 {
559 .callback = video_set_bqc_offset,
560 .ident = "Acer Aspire 5720",
561 .matches = {
562 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
563 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
564 },
565 },
5afc4abe
LB		 566 {
567 .callback = video_set_bqc_offset,
568 .ident = "Acer Aspire 5710Z",
569 .matches = {
570 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
571 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
572 },
573 },
34ac272b
ZR		 574 {
575 .callback = video_set_bqc_offset,
576 .ident = "eMachines E510",
577 .matches = {
578 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
579 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
580 },
581 },
93bcece2
ZR		 582 {
583 .callback = video_set_bqc_offset,
584 .ident = "Acer Aspire 5315",
585 .matches = {
586 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
587 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
588 },
589 },
152a4e63
ZR		 590 {
591 .callback = video_set_bqc_offset,
592 .ident = "Acer Aspire 7720",
593 .matches = {
594 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
595 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
596 },
597 },
45cb50e6
ZR		 598 {}
599};
600
1da177e4 601static int
4be44fcd 602acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
27663c58 603 unsigned long long *level)
1da177e4 604{
c8890f90 605 acpi_status status = AE_OK;
4e231fa4 606 int i;
c8890f90 607
c60d638e
ZR		 608 if (device->cap._BQC || device->cap._BCQ) {
609 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
610
611 status = acpi_evaluate_integer(device->dev->handle, buf,
c8890f90
ZR		 612 NULL, level);
613 if (ACPI_SUCCESS(status)) {
1a7c618a
ZR		 614 if (device->brightness->flags._BQC_use_index) {
615 if (device->brightness->flags._BCL_reversed)
616 *level = device->brightness->count
617 - 3 - (*level);
618 *level = device->brightness->levels[*level + 2];
619
620 }
45cb50e6 621 *level += bqc_offset_aml_bug_workaround;
4e231fa4
VS		 622 for (i = 2; i < device->brightness->count; i++)
623 if (device->brightness->levels[i] == *level) {
624 device->brightness->curr = *level;
625 return 0;
626 }
627 /* BQC returned an invalid level. Stop using it. */
628 ACPI_WARNING((AE_INFO, "%s returned an invalid level",
629 buf));
630 device->cap._BQC = device->cap._BCQ = 0;
c8890f90
ZR		 631 } else {
632 /* Fixme:
633 * should we return an error or ignore this failure?
634 * dev->brightness->curr is a cached value which stores
635 * the correct current backlight level in most cases.
636 * ACPI video backlight still works w/ buggy _BQC.
637 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
638 */
c60d638e
ZR		 639 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
640 device->cap._BQC = device->cap._BCQ = 0;
c8890f90
ZR		 641 }
642 }
643
4500ca8e 644 *level = device->brightness->curr;
c8890f90 645 return 0;
1da177e4
LT		 646}
647
648static int
4be44fcd
LB		 649acpi_video_device_EDID(struct acpi_video_device *device,
650 union acpi_object **edid, ssize_t length)
1da177e4 651{
4be44fcd
LB		 652 int status;
653 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
654 union acpi_object *obj;
655 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
656 struct acpi_object_list args = { 1, &arg0 };
1da177e4 657
1da177e4
LT		 658
659 *edid = NULL;
660
661 if (!device)
d550d98d 662 return -ENODEV;
1da177e4
LT		 663 if (length == 128)
664 arg0.integer.value = 1;
665 else if (length == 256)
666 arg0.integer.value = 2;
667 else
d550d98d 668 return -EINVAL;
1da177e4 669
90130268 670 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
1da177e4 671 if (ACPI_FAILURE(status))
d550d98d 672 return -ENODEV;
1da177e4 673
50dd0969 674 obj = buffer.pointer;
1da177e4
LT		 675
676 if (obj && obj->type == ACPI_TYPE_BUFFER)
677 *edid = obj;
678 else {
6468463a 679 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
1da177e4
LT		 680 status = -EFAULT;
681 kfree(obj);
682 }
683
d550d98d 684 return status;
1da177e4
LT		 685}
686
1da177e4
LT		 687/* bus */
688
689static int
4be44fcd 690acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
1da177e4 691{
4be44fcd 692 int status;
27663c58 693 unsigned long long tmp;
4be44fcd
LB		 694 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
695 struct acpi_object_list args = { 1, &arg0 };
1da177e4 696
1da177e4
LT		 697
698 arg0.integer.value = option;
699
90130268 700 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
1da177e4 701 if (ACPI_SUCCESS(status))
4be44fcd 702 status = tmp ? (-EINVAL) : (AE_OK);
1da177e4 703
d550d98d 704 return status;
1da177e4
LT		 705}
706
707static int
27663c58 708acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
1da177e4
LT		 709{
710 int status;
711
90130268 712 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
1da177e4 713
d550d98d 714 return status;
1da177e4
LT		 715}
716
717static int
4be44fcd 718acpi_video_bus_POST_options(struct acpi_video_bus *video,
27663c58 719 unsigned long long *options)
1da177e4 720{
4be44fcd 721 int status;
1da177e4 722
90130268 723 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
1da177e4
LT		 724 *options &= 3;
725
d550d98d 726 return status;
1da177e4
LT		 727}
728
729/*
730 * Arg:
731 * video : video bus device pointer
732 * bios_flag :
733 * 0. The system BIOS should NOT automatically switch(toggle)
734 * the active display output.
735 * 1. The system BIOS should automatically switch (toggle) the
98fb8fe1 736 * active display output. No switch event.
1da177e4
LT		 737 * 2. The _DGS value should be locked.
738 * 3. The system BIOS should not automatically switch (toggle) the
739 * active display output, but instead generate the display switch
740 * event notify code.
741 * lcd_flag :
742 * 0. The system BIOS should automatically control the brightness level
98fb8fe1 743 * of the LCD when the power changes from AC to DC
1da177e4 744 * 1. The system BIOS should NOT automatically control the brightness
98fb8fe1 745 * level of the LCD when the power changes from AC to DC.
1da177e4
LT		 746 * Return Value:
747 * -1 wrong arg.
748 */
749
750static int
4be44fcd 751acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
1da177e4 752{
4be44fcd
LB		 753 acpi_integer status = 0;
754 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
755 struct acpi_object_list args = { 1, &arg0 };
1da177e4 756
1da177e4 757
4be44fcd 758 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
1da177e4
LT		 759 status = -1;
760 goto Failed;
761 }
762 arg0.integer.value = (lcd_flag << 2) | bios_flag;
763 video->dos_setting = arg0.integer.value;
90130268 764 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
1da177e4 765
4be44fcd 766 Failed:
d550d98d 767 return status;
1da177e4
LT		 768}
769
935e5f29
ZR		 770/*
771 * Simple comparison function used to sort backlight levels.
772 */
773
774static int
775acpi_video_cmp_level(const void *a, const void *b)
776{
777 return *(int *)a - *(int *)b;
778}
779
1da177e4
LT		 780/*
781 * Arg:
782 * device : video output device (LCD, CRT, ..)
783 *
784 * Return Value:
469778c1
JJ		 785 * Maximum brightness level
786 *
787 * Allocate and initialize device->brightness.
788 */
789
790static int
791acpi_video_init_brightness(struct acpi_video_device *device)
792{
793 union acpi_object *obj = NULL;
d32f6947 794 int i, max_level = 0, count = 0, level_ac_battery = 0;
1a7c618a 795 unsigned long long level, level_old;
469778c1
JJ		 796 union acpi_object *o;
797 struct acpi_video_device_brightness *br = NULL;
1a7c618a 798 int result = -EINVAL;
469778c1
JJ		 799
800 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
801 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
802 "LCD brightness level\n"));
803 goto out;
804 }
805
806 if (obj->package.count < 2)
807 goto out;
808
809 br = kzalloc(sizeof(*br), GFP_KERNEL);
810 if (!br) {
811 printk(KERN_ERR "can't allocate memory\n");
1a7c618a 812 result = -ENOMEM;
469778c1
JJ		 813 goto out;
814 }
815
d32f6947 816 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
469778c1 817 GFP_KERNEL);
1a7c618a
ZR		 818 if (!br->levels) {
819 result = -ENOMEM;
469778c1 820 goto out_free;
1a7c618a 821 }
469778c1
JJ		 822
823 for (i = 0; i < obj->package.count; i++) {
824 o = (union acpi_object *)&obj->package.elements[i];
825 if (o->type != ACPI_TYPE_INTEGER) {
826 printk(KERN_ERR PREFIX "Invalid data\n");
827 continue;
828 }
829 br->levels[count] = (u32) o->integer.value;
830
831 if (br->levels[count] > max_level)
832 max_level = br->levels[count];
833 count++;
834 }
835
d32f6947
ZR		 836 /*
837 * some buggy BIOS don't export the levels
838 * when machine is on AC/Battery in _BCL package.
839 * In this case, the first two elements in _BCL packages
840 * are also supported brightness levels that OS should take care of.
841 */
90af2cf6
ZR		 842 for (i = 2; i < count; i++) {
843 if (br->levels[i] == br->levels[0])
d32f6947 844 level_ac_battery++;
90af2cf6
ZR		 845 if (br->levels[i] == br->levels[1])
846 level_ac_battery++;
847 }
d32f6947
ZR		 848
849 if (level_ac_battery < 2) {
850 level_ac_battery = 2 - level_ac_battery;
851 br->flags._BCL_no_ac_battery_levels = 1;
852 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
853 br->levels[i] = br->levels[i - level_ac_battery];
854 count += level_ac_battery;
855 } else if (level_ac_battery > 2)
856 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
857
d80fb99f
ZR		 858 /* Check if the _BCL package is in a reversed order */
859 if (max_level == br->levels[2]) {
860 br->flags._BCL_reversed = 1;
861 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
862 acpi_video_cmp_level, NULL);
863 } else if (max_level != br->levels[count - 1])
864 ACPI_ERROR((AE_INFO,
865 "Found unordered _BCL package\n"));
469778c1
JJ		 866
867 br->count = count;
868 device->brightness = br;
1a7c618a
ZR		 869
870 /* Check the input/output of _BQC/_BCL/_BCM */
871 if ((max_level < 100) && (max_level <= (count - 2)))
872 br->flags._BCL_use_index = 1;
873
874 /*
875 * _BCM is always consistent with _BCL,
876 * at least for all the laptops we have ever seen.
877 */
878 br->flags._BCM_use_index = br->flags._BCL_use_index;
879
880 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
e047cca6
ZR		 881 br->curr = level_old = max_level;
882
883 if (!device->cap._BQC)
884 goto set_level;
885
1a7c618a
ZR		 886 result = acpi_video_device_lcd_get_level_current(device, &level_old);
887 if (result)
888 goto out_free_levels;
889
e047cca6
ZR		 890 /*
891 * Set the level to maximum and check if _BQC uses indexed value
892 */
893 result = acpi_video_device_lcd_set_level(device, max_level);
1a7c618a
ZR		 894 if (result)
895 goto out_free_levels;
896
897 result = acpi_video_device_lcd_get_level_current(device, &level);
898 if (result)
899 goto out_free_levels;
900
e047cca6
ZR		 901 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
902
903 if (!br->flags._BQC_use_index)
904 goto set_level;
905
906 if (br->flags._BCL_reversed)
907 level_old = (br->count - 1) - level_old;
908 level_old = br->levels[level_old];
909
910set_level:
911 result = acpi_video_device_lcd_set_level(device, level_old);
912 if (result)
913 goto out_free_levels;
1a7c618a 914
d32f6947
ZR		 915 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
916 "found %d brightness levels\n", count - 2));
469778c1 917 kfree(obj);
1a7c618a 918 return result;
469778c1
JJ		 919
920out_free_levels:
921 kfree(br->levels);
922out_free:
923 kfree(br);
924out:
925 device->brightness = NULL;
926 kfree(obj);
1a7c618a 927 return result;
469778c1
JJ		 928}
929
930/*
931 * Arg:
932 * device : video output device (LCD, CRT, ..)
933 *
934 * Return Value:
1da177e4
LT		 935 * None
936 *
98fb8fe1 937 * Find out all required AML methods defined under the output
1da177e4
LT		 938 * device.
939 */
940
4be44fcd 941static void acpi_video_device_find_cap(struct acpi_video_device *device)
1da177e4 942{
1da177e4 943 acpi_handle h_dummy1;
1da177e4 944
90130268 945 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
1da177e4
LT		 946 device->cap._ADR = 1;
947 }
90130268 948 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
4be44fcd 949 device->cap._BCL = 1;
1da177e4 950 }
90130268 951 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
4be44fcd 952 device->cap._BCM = 1;
1da177e4 953 }
2f3d000a
YL		 954 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
955 device->cap._BQC = 1;
c60d638e
ZR		 956 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
957 &h_dummy1))) {
958 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
959 device->cap._BCQ = 1;
960 }
961
90130268 962 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
4be44fcd 963 device->cap._DDC = 1;
1da177e4 964 }
90130268 965 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
1da177e4
LT		 966 device->cap._DCS = 1;
967 }
90130268 968 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
1da177e4
LT		 969 device->cap._DGS = 1;
970 }
90130268 971 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
1da177e4
LT		 972 device->cap._DSS = 1;
973 }
974
1a7c618a 975 if (acpi_video_backlight_support()) {
702ed512 976 int result;
2f3d000a
YL		 977 static int count = 0;
978 char *name;
1a7c618a
ZR		 979
980 result = acpi_video_init_brightness(device);
981 if (result)
982 return;
2f3d000a
YL		 983 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
984 if (!name)
985 return;
986
2f3d000a 987 sprintf(name, "acpi_video%d", count++);
2f3d000a 988 device->backlight = backlight_device_register(name,
599a52d1 989 NULL, device, &acpi_backlight_ops);
38531e6f 990 device->backlight->props.max_brightness = device->brightness->count-3;
2f3d000a 991 kfree(name);
702ed512 992
056c308d
ZR		 993 result = sysfs_create_link(&device->backlight->dev.kobj,
994 &device->dev->dev.kobj, "device");
995 if (result)
996 printk(KERN_ERR PREFIX "Create sysfs link\n");
997
702ed512
ZR		 998 device->cdev = thermal_cooling_device_register("LCD",
999 device->dev, &video_cooling_ops);
43ff39f2
TS		 1000 if (IS_ERR(device->cdev))
1001 return;
1002
fc3a8828
GKH		 1003 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
1004 device->cdev->id);
9030062f
JL		 1005 result = sysfs_create_link(&device->dev->dev.kobj,
1006 &device->cdev->device.kobj,
1007 "thermal_cooling");
1008 if (result)
1009 printk(KERN_ERR PREFIX "Create sysfs link\n");
1010 result = sysfs_create_link(&device->cdev->device.kobj,
1011 &device->dev->dev.kobj, "device");
1012 if (result)
1013 printk(KERN_ERR PREFIX "Create sysfs link\n");
1014
2f3d000a 1015 }
c3d6de69
TR		 1016
1017 if (acpi_video_display_switch_support()) {
1018
1019 if (device->cap._DCS && device->cap._DSS) {
1020 static int count;
1021 char *name;
1022 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
1023 if (!name)
1024 return;
1025 sprintf(name, "acpi_video%d", count++);
1026 device->output_dev = video_output_register(name,
1027 NULL, device, &acpi_output_properties);
1028 kfree(name);
1029 }
23b0f015 1030 }
1da177e4
LT		 1031}
1032
1033/*
1034 * Arg:
1035 * device : video output device (VGA)
1036 *
1037 * Return Value:
1038 * None
1039 *
98fb8fe1 1040 * Find out all required AML methods defined under the video bus device.
1da177e4
LT		 1041 */
1042
4be44fcd 1043static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1da177e4 1044{
4be44fcd 1045 acpi_handle h_dummy1;
1da177e4 1046
90130268 1047 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
1da177e4
LT		 1048 video->cap._DOS = 1;
1049 }
90130268 1050 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
1da177e4
LT		 1051 video->cap._DOD = 1;
1052 }
90130268 1053 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
1da177e4
LT		 1054 video->cap._ROM = 1;
1055 }
90130268 1056 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
1da177e4
LT		 1057 video->cap._GPD = 1;
1058 }
90130268 1059 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
1da177e4
LT		 1060 video->cap._SPD = 1;
1061 }
90130268 1062 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
1da177e4
LT		 1063 video->cap._VPO = 1;
1064 }
1065}
1066
1067/*
1068 * Check whether the video bus device has required AML method to
1069 * support the desired features
1070 */
1071
4be44fcd 1072static int acpi_video_bus_check(struct acpi_video_bus *video)
1da177e4 1073{
4be44fcd 1074 acpi_status status = -ENOENT;
1e4cffe7 1075 struct pci_dev *dev;
1da177e4
LT		 1076
1077 if (!video)
d550d98d 1078 return -EINVAL;
1da177e4 1079
1e4cffe7 1080 dev = acpi_get_pci_dev(video->device->handle);
22c13f9d
TR		 1081 if (!dev)
1082 return -ENODEV;
1e4cffe7 1083 pci_dev_put(dev);
22c13f9d 1084
1da177e4
LT		 1085 /* Since there is no HID, CID and so on for VGA driver, we have
1086 * to check well known required nodes.
1087 */
1088
98fb8fe1 1089 /* Does this device support video switching? */
4be44fcd 1090 if (video->cap._DOS) {
1da177e4
LT		 1091 video->flags.multihead = 1;
1092 status = 0;
1093 }
1094
98fb8fe1 1095 /* Does this device support retrieving a video ROM? */
4be44fcd 1096 if (video->cap._ROM) {
1da177e4
LT		 1097 video->flags.rom = 1;
1098 status = 0;
1099 }
1100
98fb8fe1 1101 /* Does this device support configuring which video device to POST? */
4be44fcd 1102 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1da177e4
LT		 1103 video->flags.post = 1;
1104 status = 0;
1105 }
1106
d550d98d 1107 return status;
1da177e4
LT		 1108}
1109
1110/* --------------------------------------------------------------------------
1111 FS Interface (/proc)
1112 -------------------------------------------------------------------------- */
1113
4be44fcd 1114static struct proc_dir_entry *acpi_video_dir;
1da177e4
LT		 1115
1116/* video devices */
1117
4be44fcd 1118static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1da177e4 1119{
50dd0969 1120 struct acpi_video_device *dev = seq->private;
1da177e4 1121
1da177e4
LT		 1122
1123 if (!dev)
1124 goto end;
1125
1126 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1127 seq_printf(seq, "type: ");
1128 if (dev->flags.crt)
1129 seq_printf(seq, "CRT\n");
1130 else if (dev->flags.lcd)
1131 seq_printf(seq, "LCD\n");
1132 else if (dev->flags.tvout)
1133 seq_printf(seq, "TVOUT\n");
82cae999
RZ		 1134 else if (dev->flags.dvi)
1135 seq_printf(seq, "DVI\n");
1da177e4
LT		 1136 else
1137 seq_printf(seq, "UNKNOWN\n");
1138
4be44fcd 1139 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1da177e4 1140
4be44fcd 1141 end:
d550d98d 1142 return 0;
1da177e4
LT		 1143}
1144
1145static int
4be44fcd 1146acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1da177e4
LT		 1147{
1148 return single_open(file, acpi_video_device_info_seq_show,
1149 PDE(inode)->data);
1150}
1151
4be44fcd 1152static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1da177e4 1153{
4be44fcd 1154 int status;
50dd0969 1155 struct acpi_video_device *dev = seq->private;
27663c58 1156 unsigned long long state;
1da177e4 1157
1da177e4
LT		 1158
1159 if (!dev)
1160 goto end;
1161
1162 status = acpi_video_device_get_state(dev, &state);
1163 seq_printf(seq, "state: ");
1164 if (ACPI_SUCCESS(status))
27663c58 1165 seq_printf(seq, "0x%02llx\n", state);
1da177e4
LT		 1166 else
1167 seq_printf(seq, "<not supported>\n");
1168
1169 status = acpi_video_device_query(dev, &state);
1170 seq_printf(seq, "query: ");
1171 if (ACPI_SUCCESS(status))
27663c58 1172 seq_printf(seq, "0x%02llx\n", state);
1da177e4
LT		 1173 else
1174 seq_printf(seq, "<not supported>\n");
1175
4be44fcd 1176 end:
d550d98d 1177 return 0;
1da177e4
LT		 1178}
1179
1180static int
4be44fcd 1181acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1da177e4
LT		 1182{
1183 return single_open(file, acpi_video_device_state_seq_show,
1184 PDE(inode)->data);
1185}
1186
1187static ssize_t
4be44fcd
LB		 1188acpi_video_device_write_state(struct file *file,
1189 const char __user * buffer,
1190 size_t count, loff_t * data)
1da177e4 1191{
4be44fcd 1192 int status;
50dd0969
JE		 1193 struct seq_file *m = file->private_data;
1194 struct acpi_video_device *dev = m->private;
4be44fcd
LB		 1195 char str[12] = { 0 };
1196 u32 state = 0;
1da177e4 1197
1da177e4
LT		 1198
1199 if (!dev || count + 1 > sizeof str)
d550d98d 1200 return -EINVAL;
1da177e4
LT		 1201
1202 if (copy_from_user(str, buffer, count))
d550d98d 1203 return -EFAULT;
1da177e4
LT		 1204
1205 str[count] = 0;
1206 state = simple_strtoul(str, NULL, 0);
4be44fcd 1207 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1da177e4
LT		 1208
1209 status = acpi_video_device_set_state(dev, state);
1210
1211 if (status)
d550d98d 1212 return -EFAULT;
1da177e4 1213
d550d98d 1214 return count;
1da177e4
LT		 1215}
1216
1217static int
4be44fcd 1218acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1da177e4 1219{
50dd0969 1220 struct acpi_video_device *dev = seq->private;
4be44fcd 1221 int i;
1da177e4 1222
1da177e4
LT		 1223
1224 if (!dev || !dev->brightness) {
1225 seq_printf(seq, "<not supported>\n");
d550d98d 1226 return 0;
1da177e4
LT		 1227 }
1228
1229 seq_printf(seq, "levels: ");
0a3db1ce 1230 for (i = 2; i < dev->brightness->count; i++)
1da177e4
LT		 1231 seq_printf(seq, " %d", dev->brightness->levels[i]);
1232 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1233
d550d98d 1234 return 0;
1da177e4
LT		 1235}
1236
1237static int
4be44fcd 1238acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1da177e4
LT		 1239{
1240 return single_open(file, acpi_video_device_brightness_seq_show,
1241 PDE(inode)->data);
1242}
1243
1244static ssize_t
4be44fcd
LB		 1245acpi_video_device_write_brightness(struct file *file,
1246 const char __user * buffer,
1247 size_t count, loff_t * data)
1da177e4 1248{
50dd0969
JE		 1249 struct seq_file *m = file->private_data;
1250 struct acpi_video_device *dev = m->private;
c88c5786 1251 char str[5] = { 0 };
4be44fcd
LB		 1252 unsigned int level = 0;
1253 int i;
1da177e4 1254
1da177e4 1255
59d399d3 1256 if (!dev || !dev->brightness || count + 1 > sizeof str)
d550d98d 1257 return -EINVAL;
1da177e4
LT		 1258
1259 if (copy_from_user(str, buffer, count))
d550d98d 1260 return -EFAULT;
1da177e4
LT		 1261
1262 str[count] = 0;
1263 level = simple_strtoul(str, NULL, 0);
4be44fcd 1264
1da177e4 1265 if (level > 100)
d550d98d 1266 return -EFAULT;
1da177e4 1267
98fb8fe1 1268 /* validate through the list of available levels */
0a3db1ce 1269 for (i = 2; i < dev->brightness->count; i++)
1da177e4 1270 if (level == dev->brightness->levels[i]) {
24450c7a
ZR		 1271 if (!acpi_video_device_lcd_set_level(dev, level))
1272 return count;
1da177e4
LT		 1273 break;
1274 }
1275
24450c7a 1276 return -EINVAL;
1da177e4
LT		 1277}
1278
4be44fcd 1279static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1da177e4 1280{
50dd0969 1281 struct acpi_video_device *dev = seq->private;
4be44fcd
LB		 1282 int status;
1283 int i;
1284 union acpi_object *edid = NULL;
1da177e4 1285
1da177e4
LT		 1286
1287 if (!dev)
1288 goto out;
1289
4be44fcd 1290 status = acpi_video_device_EDID(dev, &edid, 128);
1da177e4 1291 if (ACPI_FAILURE(status)) {
4be44fcd 1292 status = acpi_video_device_EDID(dev, &edid, 256);
1da177e4
LT		 1293 }
1294
1295 if (ACPI_FAILURE(status)) {
1296 goto out;
1297 }
1298
1299 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1300 for (i = 0; i < edid->buffer.length; i++)
1301 seq_putc(seq, edid->buffer.pointer[i]);
1302 }
1303
4be44fcd 1304 out:
1da177e4
LT		 1305 if (!edid)
1306 seq_printf(seq, "<not supported>\n");
1307 else
1308 kfree(edid);
1309
d550d98d 1310 return 0;
1da177e4
LT		 1311}
1312
1313static int
4be44fcd 1314acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1da177e4
LT		 1315{
1316 return single_open(file, acpi_video_device_EDID_seq_show,
1317 PDE(inode)->data);
1318}
1319
4be44fcd 1320static int acpi_video_device_add_fs(struct acpi_device *device)
1da177e4 1321{
251cb0bc 1322 struct proc_dir_entry *entry, *device_dir;
1da177e4
LT		 1323 struct acpi_video_device *vid_dev;
1324
50dd0969 1325 vid_dev = acpi_driver_data(device);
1da177e4 1326 if (!vid_dev)
d550d98d 1327 return -ENODEV;
1da177e4 1328
251cb0bc
DT		 1329 device_dir = proc_mkdir(acpi_device_bid(device),
1330 vid_dev->video->dir);
1331 if (!device_dir)
1332 return -ENOMEM;
1333
1da177e4 1334 /* 'info' [R] */
e0066c4e 1335 entry = proc_create_data("info", S_IRUGO, device_dir,
cf7acfab 1336 &acpi_video_device_info_fops, acpi_driver_data(device));
1da177e4 1337 if (!entry)
251cb0bc 1338 goto err_remove_dir;
1da177e4
LT		 1339
1340 /* 'state' [R/W] */
cf7acfab 1341 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
e0066c4e 1342 device_dir,
cf7acfab
DL		 1343 &acpi_video_device_state_fops,
1344 acpi_driver_data(device));
1da177e4 1345 if (!entry)
251cb0bc 1346 goto err_remove_info;
1da177e4
LT		 1347
1348 /* 'brightness' [R/W] */
cf7acfab 1349 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
e0066c4e 1350 device_dir,
cf7acfab
DL		 1351 &acpi_video_device_brightness_fops,
1352 acpi_driver_data(device));
1da177e4 1353 if (!entry)
251cb0bc 1354 goto err_remove_state;
1da177e4
LT		 1355
1356 /* 'EDID' [R] */
e0066c4e 1357 entry = proc_create_data("EDID", S_IRUGO, device_dir,
cf7acfab
DL		 1358 &acpi_video_device_EDID_fops,
1359 acpi_driver_data(device));
1da177e4 1360 if (!entry)
251cb0bc 1361 goto err_remove_brightness;
1da177e4 1362
e0066c4e
AD		 1363 acpi_device_dir(device) = device_dir;
1364
d550d98d 1365 return 0;
251cb0bc
DT		 1366
1367 err_remove_brightness:
1368 remove_proc_entry("brightness", device_dir);
1369 err_remove_state:
1370 remove_proc_entry("state", device_dir);
1371 err_remove_info:
1372 remove_proc_entry("info", device_dir);
1373 err_remove_dir:
1374 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1375 return -ENOMEM;
1da177e4
LT		 1376}
1377
4be44fcd 1378static int acpi_video_device_remove_fs(struct acpi_device *device)
1da177e4
LT		 1379{
1380 struct acpi_video_device *vid_dev;
251cb0bc 1381 struct proc_dir_entry *device_dir;
1da177e4 1382
50dd0969 1383 vid_dev = acpi_driver_data(device);
1da177e4 1384 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
d550d98d 1385 return -ENODEV;
1da177e4 1386
251cb0bc
DT		 1387 device_dir = acpi_device_dir(device);
1388 if (device_dir) {
1389 remove_proc_entry("info", device_dir);
1390 remove_proc_entry("state", device_dir);
1391 remove_proc_entry("brightness", device_dir);
1392 remove_proc_entry("EDID", device_dir);
4be44fcd 1393 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1da177e4
LT		 1394 acpi_device_dir(device) = NULL;
1395 }
1396
d550d98d 1397 return 0;
1da177e4
LT		 1398}
1399
1da177e4 1400/* video bus */
4be44fcd 1401static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1da177e4 1402{
50dd0969 1403 struct acpi_video_bus *video = seq->private;
1da177e4 1404
1da177e4
LT		 1405
1406 if (!video)
1407 goto end;
1408
1409 seq_printf(seq, "Switching heads: %s\n",
4be44fcd 1410 video->flags.multihead ? "yes" : "no");
1da177e4 1411 seq_printf(seq, "Video ROM: %s\n",
4be44fcd 1412 video->flags.rom ? "yes" : "no");
1da177e4 1413 seq_printf(seq, "Device to be POSTed on boot: %s\n",
4be44fcd 1414 video->flags.post ? "yes" : "no");
1da177e4 1415
4be44fcd 1416 end:
d550d98d 1417 return 0;
1da177e4
LT		 1418}
1419
4be44fcd 1420static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1da177e4 1421{
4be44fcd
LB		 1422 return single_open(file, acpi_video_bus_info_seq_show,
1423 PDE(inode)->data);
1da177e4
LT		 1424}
1425
4be44fcd 1426static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1da177e4 1427{
50dd0969 1428 struct acpi_video_bus *video = seq->private;
1da177e4 1429
1da177e4
LT		 1430
1431 if (!video)
1432 goto end;
1433
96b2dd1f 1434 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1da177e4
LT		 1435 seq_printf(seq, "<TODO>\n");
1436
4be44fcd 1437 end:
d550d98d 1438 return 0;
1da177e4
LT		 1439}
1440
4be44fcd 1441static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1da177e4
LT		 1442{
1443 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1444}
1445
4be44fcd 1446static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1da177e4 1447{
50dd0969 1448 struct acpi_video_bus *video = seq->private;
27663c58 1449 unsigned long long options;
4be44fcd 1450 int status;
1da177e4 1451
1da177e4
LT		 1452
1453 if (!video)
1454 goto end;
1455
1456 status = acpi_video_bus_POST_options(video, &options);
1457 if (ACPI_SUCCESS(status)) {
1458 if (!(options & 1)) {
4be44fcd
LB		 1459 printk(KERN_WARNING PREFIX
1460 "The motherboard VGA device is not listed as a possible POST device.\n");
1461 printk(KERN_WARNING PREFIX
98fb8fe1 1462 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1da177e4 1463 }
4d939155 1464 printk(KERN_WARNING "%llx\n", options);
98fb8fe1 1465 seq_printf(seq, "can POST: <integrated video>");
1da177e4
LT		 1466 if (options & 2)
1467 seq_printf(seq, " <PCI video>");
1468 if (options & 4)
1469 seq_printf(seq, " <AGP video>");
1470 seq_putc(seq, '\n');
1471 } else
1472 seq_printf(seq, "<not supported>\n");
4be44fcd 1473 end:
d550d98d 1474 return 0;
1da177e4
LT		 1475}
1476
1477static int
4be44fcd 1478acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1da177e4 1479{
4be44fcd
LB		 1480 return single_open(file, acpi_video_bus_POST_info_seq_show,
1481 PDE(inode)->data);
1da177e4
LT		 1482}
1483
4be44fcd 1484static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1da177e4 1485{
50dd0969 1486 struct acpi_video_bus *video = seq->private;
4be44fcd 1487 int status;
27663c58 1488 unsigned long long id;
1da177e4 1489
1da177e4
LT		 1490
1491 if (!video)
1492 goto end;
1493
4be44fcd 1494 status = acpi_video_bus_get_POST(video, &id);
1da177e4
LT		 1495 if (!ACPI_SUCCESS(status)) {
1496 seq_printf(seq, "<not supported>\n");
1497 goto end;
1498 }
98fb8fe1 1499 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1da177e4 1500
4be44fcd 1501 end:
d550d98d 1502 return 0;
1da177e4
LT		 1503}
1504
4be44fcd 1505static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1da177e4 1506{
50dd0969 1507 struct acpi_video_bus *video = seq->private;
1da177e4 1508
1da177e4 1509
4be44fcd 1510 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1da177e4 1511
d550d98d 1512 return 0;
1da177e4
LT		 1513}
1514
4be44fcd 1515static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1da177e4 1516{
4be44fcd
LB		 1517 return single_open(file, acpi_video_bus_POST_seq_show,
1518 PDE(inode)->data);
1da177e4
LT		 1519}
1520
4be44fcd 1521static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1da177e4
LT		 1522{
1523 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1524}
1525
1526static ssize_t
4be44fcd
LB		 1527acpi_video_bus_write_POST(struct file *file,
1528 const char __user * buffer,
1529 size_t count, loff_t * data)
1da177e4 1530{
4be44fcd 1531 int status;
50dd0969
JE		 1532 struct seq_file *m = file->private_data;
1533 struct acpi_video_bus *video = m->private;
4be44fcd 1534 char str[12] = { 0 };
27663c58 1535 unsigned long long opt, options;
1da177e4 1536
1da177e4 1537
1da177e4 1538 if (!video || count + 1 > sizeof str)
d550d98d 1539 return -EINVAL;
1da177e4
LT		 1540
1541 status = acpi_video_bus_POST_options(video, &options);
1542 if (!ACPI_SUCCESS(status))
d550d98d 1543 return -EINVAL;
1da177e4
LT		 1544
1545 if (copy_from_user(str, buffer, count))
d550d98d 1546 return -EFAULT;
1da177e4
LT		 1547
1548 str[count] = 0;
1549 opt = strtoul(str, NULL, 0);
1550 if (opt > 3)
d550d98d 1551 return -EFAULT;
1da177e4 1552
98fb8fe1 1553 /* just in case an OEM 'forgot' the motherboard... */
1da177e4
LT		 1554 options |= 1;
1555
1556 if (options & (1ul << opt)) {
4be44fcd 1557 status = acpi_video_bus_set_POST(video, opt);
1da177e4 1558 if (!ACPI_SUCCESS(status))
d550d98d 1559 return -EFAULT;
1da177e4
LT		 1560
1561 }
1562
d550d98d 1563 return count;
1da177e4
LT		 1564}
1565
1566static ssize_t
4be44fcd
LB		 1567acpi_video_bus_write_DOS(struct file *file,
1568 const char __user * buffer,
1569 size_t count, loff_t * data)
1da177e4 1570{
4be44fcd 1571 int status;
50dd0969
JE		 1572 struct seq_file *m = file->private_data;
1573 struct acpi_video_bus *video = m->private;
4be44fcd
LB		 1574 char str[12] = { 0 };
1575 unsigned long opt;
1da177e4 1576
1da177e4 1577
1da177e4 1578 if (!video || count + 1 > sizeof str)
d550d98d 1579 return -EINVAL;
1da177e4
LT		 1580
1581 if (copy_from_user(str, buffer, count))
d550d98d 1582 return -EFAULT;
1da177e4
LT		 1583
1584 str[count] = 0;
1585 opt = strtoul(str, NULL, 0);
1586 if (opt > 7)
d550d98d 1587 return -EFAULT;
1da177e4 1588
4be44fcd 1589 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1da177e4
LT		 1590
1591 if (!ACPI_SUCCESS(status))
d550d98d 1592 return -EFAULT;
1da177e4 1593
d550d98d 1594 return count;
1da177e4
LT		 1595}
1596
4be44fcd 1597static int acpi_video_bus_add_fs(struct acpi_device *device)
1da177e4 1598{
251cb0bc
DT		 1599 struct acpi_video_bus *video = acpi_driver_data(device);
1600 struct proc_dir_entry *device_dir;
1601 struct proc_dir_entry *entry;
1da177e4 1602
251cb0bc
DT		 1603 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1604 if (!device_dir)
1605 return -ENOMEM;
1da177e4 1606
1da177e4 1607 /* 'info' [R] */
e0066c4e 1608 entry = proc_create_data("info", S_IRUGO, device_dir,
cf7acfab
DL		 1609 &acpi_video_bus_info_fops,
1610 acpi_driver_data(device));
1da177e4 1611 if (!entry)
251cb0bc 1612 goto err_remove_dir;
1da177e4
LT		 1613
1614 /* 'ROM' [R] */
e0066c4e 1615 entry = proc_create_data("ROM", S_IRUGO, device_dir,
cf7acfab
DL		 1616 &acpi_video_bus_ROM_fops,
1617 acpi_driver_data(device));
1da177e4 1618 if (!entry)
251cb0bc 1619 goto err_remove_info;
1da177e4
LT		 1620
1621 /* 'POST_info' [R] */
e0066c4e 1622 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
cf7acfab
DL		 1623 &acpi_video_bus_POST_info_fops,
1624 acpi_driver_data(device));
1da177e4 1625 if (!entry)
251cb0bc 1626 goto err_remove_rom;
1da177e4
LT		 1627
1628 /* 'POST' [R/W] */
08acd4f8 1629 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
e0066c4e 1630 device_dir,
cf7acfab
DL		 1631 &acpi_video_bus_POST_fops,
1632 acpi_driver_data(device));
1da177e4 1633 if (!entry)
251cb0bc 1634 goto err_remove_post_info;
1da177e4
LT		 1635
1636 /* 'DOS' [R/W] */
08acd4f8 1637 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
e0066c4e 1638 device_dir,
cf7acfab
DL		 1639 &acpi_video_bus_DOS_fops,
1640 acpi_driver_data(device));
1da177e4 1641 if (!entry)
251cb0bc 1642 goto err_remove_post;
1da177e4 1643
251cb0bc 1644 video->dir = acpi_device_dir(device) = device_dir;
d550d98d 1645 return 0;
251cb0bc
DT		 1646
1647 err_remove_post:
1648 remove_proc_entry("POST", device_dir);
1649 err_remove_post_info:
1650 remove_proc_entry("POST_info", device_dir);
1651 err_remove_rom:
1652 remove_proc_entry("ROM", device_dir);
1653 err_remove_info:
1654 remove_proc_entry("info", device_dir);
1655 err_remove_dir:
1656 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1657 return -ENOMEM;
1da177e4
LT		 1658}
1659
4be44fcd 1660static int acpi_video_bus_remove_fs(struct acpi_device *device)
1da177e4 1661{
251cb0bc
DT		 1662 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1663
1664 if (device_dir) {
1665 remove_proc_entry("info", device_dir);
1666 remove_proc_entry("ROM", device_dir);
1667 remove_proc_entry("POST_info", device_dir);
1668 remove_proc_entry("POST", device_dir);
1669 remove_proc_entry("DOS", device_dir);
4be44fcd 1670 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1da177e4
LT		 1671 acpi_device_dir(device) = NULL;
1672 }
1673
d550d98d 1674 return 0;
1da177e4
LT		 1675}
1676
1677/* --------------------------------------------------------------------------
1678 Driver Interface
1679 -------------------------------------------------------------------------- */
1680
1681/* device interface */
82cae999
RZ		 1682static struct acpi_video_device_attrib*
1683acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1684{
78eed028
DT		 1685 struct acpi_video_enumerated_device *ids;
1686 int i;
1687
1688 for (i = 0; i < video->attached_count; i++) {
1689 ids = &video->attached_array[i];
1690 if ((ids->value.int_val & 0xffff) == device_id)
1691 return &ids->value.attrib;
1692 }
82cae999 1693
82cae999
RZ		 1694 return NULL;
1695}
1da177e4
LT		 1696
1697static int
4be44fcd
LB		 1698acpi_video_bus_get_one_device(struct acpi_device *device,
1699 struct acpi_video_bus *video)
1da177e4 1700{
27663c58 1701 unsigned long long device_id;
973bf491 1702 int status;
4be44fcd 1703 struct acpi_video_device *data;
82cae999 1704 struct acpi_video_device_attrib* attribute;
1da177e4
LT		 1705
1706 if (!device || !video)
d550d98d 1707 return -EINVAL;
1da177e4 1708
4be44fcd
LB		 1709 status =
1710 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1da177e4
LT		 1711 if (ACPI_SUCCESS(status)) {
1712
36bcbec7 1713 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1da177e4 1714 if (!data)
d550d98d 1715 return -ENOMEM;
1da177e4 1716
1da177e4
LT		 1717 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1718 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
db89b4f0 1719 device->driver_data = data;
1da177e4
LT		 1720
1721 data->device_id = device_id;
1722 data->video = video;
1723 data->dev = device;
1724
82cae999
RZ		 1725 attribute = acpi_video_get_device_attr(video, device_id);
1726
1727 if((attribute != NULL) && attribute->device_id_scheme) {
1728 switch (attribute->display_type) {
1729 case ACPI_VIDEO_DISPLAY_CRT:
1730 data->flags.crt = 1;
1731 break;
1732 case ACPI_VIDEO_DISPLAY_TV:
1733 data->flags.tvout = 1;
1734 break;
1735 case ACPI_VIDEO_DISPLAY_DVI:
1736 data->flags.dvi = 1;
1737 break;
1738 case ACPI_VIDEO_DISPLAY_LCD:
1739 data->flags.lcd = 1;
1740 break;
1741 default:
1742 data->flags.unknown = 1;
1743 break;
1744 }
1745 if(attribute->bios_can_detect)
1746 data->flags.bios = 1;
1747 } else
1da177e4 1748 data->flags.unknown = 1;
4be44fcd 1749
1da177e4
LT		 1750 acpi_video_device_bind(video, data);
1751 acpi_video_device_find_cap(data);
1752
90130268 1753 status = acpi_install_notify_handler(device->handle,
4be44fcd
LB		 1754 ACPI_DEVICE_NOTIFY,
1755 acpi_video_device_notify,
1756 data);
1da177e4 1757 if (ACPI_FAILURE(status)) {
55ac9a01
LM		 1758 printk(KERN_ERR PREFIX
1759 "Error installing notify handler\n");
973bf491
YL		 1760 if(data->brightness)
1761 kfree(data->brightness->levels);
1762 kfree(data->brightness);
1763 kfree(data);
1764 return -ENODEV;
1da177e4
LT		 1765 }
1766
bbac81f5 1767 mutex_lock(&video->device_list_lock);
1da177e4 1768 list_add_tail(&data->entry, &video->video_device_list);
bbac81f5 1769 mutex_unlock(&video->device_list_lock);
1da177e4
LT		 1770
1771 acpi_video_device_add_fs(device);
1772
d550d98d 1773 return 0;
1da177e4
LT		 1774 }
1775
d550d98d 1776 return -ENOENT;
1da177e4
LT		 1777}
1778
1779/*
1780 * Arg:
1781 * video : video bus device
1782 *
1783 * Return:
1784 * none
1785 *
1786 * Enumerate the video device list of the video bus,
1787 * bind the ids with the corresponding video devices
1788 * under the video bus.
4be44fcd 1789 */
1da177e4 1790
4be44fcd 1791static void acpi_video_device_rebind(struct acpi_video_bus *video)
1da177e4 1792{
ff102ea9
DT		 1793 struct acpi_video_device *dev;
1794
bbac81f5 1795 mutex_lock(&video->device_list_lock);
ff102ea9
DT		 1796
1797 list_for_each_entry(dev, &video->video_device_list, entry)
4be44fcd 1798 acpi_video_device_bind(video, dev);
ff102ea9 1799
bbac81f5 1800 mutex_unlock(&video->device_list_lock);
1da177e4
LT		 1801}
1802
1803/*
1804 * Arg:
1805 * video : video bus device
1806 * device : video output device under the video
1807 * bus
1808 *
1809 * Return:
1810 * none
1811 *
1812 * Bind the ids with the corresponding video devices
1813 * under the video bus.
4be44fcd 1814 */
1da177e4
LT		 1815
1816static void
4be44fcd
LB		 1817acpi_video_device_bind(struct acpi_video_bus *video,
1818 struct acpi_video_device *device)
1da177e4 1819{
78eed028 1820 struct acpi_video_enumerated_device *ids;
4be44fcd 1821 int i;
1da177e4 1822
78eed028
DT		 1823 for (i = 0; i < video->attached_count; i++) {
1824 ids = &video->attached_array[i];
1825 if (device->device_id == (ids->value.int_val & 0xffff)) {
1826 ids->bind_info = device;
1da177e4
LT		 1827 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1828 }
1829 }
1da177e4
LT		 1830}
1831
1832/*
1833 * Arg:
1834 * video : video bus device
1835 *
1836 * Return:
1837 * < 0 : error
1838 *
1839 * Call _DOD to enumerate all devices attached to display adapter
1840 *
4be44fcd 1841 */
1da177e4
LT		 1842
1843static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1844{
4be44fcd
LB		 1845 int status;
1846 int count;
1847 int i;
78eed028 1848 struct acpi_video_enumerated_device *active_list;
4be44fcd
LB		 1849 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1850 union acpi_object *dod = NULL;
1851 union acpi_object *obj;
1da177e4 1852
90130268 1853 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1da177e4 1854 if (!ACPI_SUCCESS(status)) {
a6fc6720 1855 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
d550d98d 1856 return status;
1da177e4
LT		 1857 }
1858
50dd0969 1859 dod = buffer.pointer;
1da177e4 1860 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
a6fc6720 1861 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1da177e4
LT		 1862 status = -EFAULT;
1863 goto out;
1864 }
1865
1866 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
4be44fcd 1867 dod->package.count));
1da177e4 1868
78eed028
DT		 1869 active_list = kcalloc(1 + dod->package.count,
1870 sizeof(struct acpi_video_enumerated_device),
1871 GFP_KERNEL);
1872 if (!active_list) {
1da177e4
LT		 1873 status = -ENOMEM;
1874 goto out;
1875 }
1876
1877 count = 0;
1878 for (i = 0; i < dod->package.count; i++) {
50dd0969 1879 obj = &dod->package.elements[i];
1da177e4
LT		 1880
1881 if (obj->type != ACPI_TYPE_INTEGER) {
78eed028
DT		 1882 printk(KERN_ERR PREFIX
1883 "Invalid _DOD data in element %d\n", i);
1884 continue;
1da177e4 1885 }
78eed028
DT		 1886
1887 active_list[count].value.int_val = obj->integer.value;
1888 active_list[count].bind_info = NULL;
4be44fcd
LB		 1889 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1890 (int)obj->integer.value));
1da177e4
LT		 1891 count++;
1892 }
1da177e4 1893
6044ec88 1894 kfree(video->attached_array);
4be44fcd 1895
78eed028 1896 video->attached_array = active_list;
1da177e4 1897 video->attached_count = count;
78eed028
DT		 1898
1899 out:
02438d87 1900 kfree(buffer.pointer);
d550d98d 1901 return status;
1da177e4
LT		 1902}
1903
4be44fcd
LB		 1904static int
1905acpi_video_get_next_level(struct acpi_video_device *device,
1906 u32 level_current, u32 event)
1da177e4 1907{
63f0edfc 1908 int min, max, min_above, max_below, i, l, delta = 255;
f4715189
TT		 1909 max = max_below = 0;
1910 min = min_above = 255;
63f0edfc 1911 /* Find closest level to level_current */
0a3db1ce 1912 for (i = 2; i < device->brightness->count; i++) {
63f0edfc
AS		 1913 l = device->brightness->levels[i];
1914 if (abs(l - level_current) < abs(delta)) {
1915 delta = l - level_current;
1916 if (!delta)
1917 break;
1918 }
1919 }
1920 /* Ajust level_current to closest available level */
1921 level_current += delta;
0a3db1ce 1922 for (i = 2; i < device->brightness->count; i++) {
f4715189
TT		 1923 l = device->brightness->levels[i];
1924 if (l < min)
1925 min = l;
1926 if (l > max)
1927 max = l;
1928 if (l < min_above && l > level_current)
1929 min_above = l;
1930 if (l > max_below && l < level_current)
1931 max_below = l;
1932 }
1933
1934 switch (event) {
1935 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1936 return (level_current < max) ? min_above : min;
1937 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1938 return (level_current < max) ? min_above : max;
1939 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1940 return (level_current > min) ? max_below : min;
1941 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1942 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1943 return 0;
1944 default:
1945 return level_current;
1946 }
1da177e4
LT		 1947}
1948
c8890f90 1949static int
4be44fcd 1950acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1da177e4 1951{
27663c58 1952 unsigned long long level_current, level_next;
c8890f90
ZR		 1953 int result = -EINVAL;
1954
469778c1 1955 if (!device->brightness)
c8890f90
ZR		 1956 goto out;
1957
1958 result = acpi_video_device_lcd_get_level_current(device,
1959 &level_current);
1960 if (result)
1961 goto out;
1962
1da177e4 1963 level_next = acpi_video_get_next_level(device, level_current, event);
c8890f90 1964
24450c7a 1965 result = acpi_video_device_lcd_set_level(device, level_next);
c8890f90
ZR		 1966
1967out:
1968 if (result)
1969 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1970
1971 return result;
1da177e4
LT		 1972}
1973
1974static int
4be44fcd
LB		 1975acpi_video_bus_get_devices(struct acpi_video_bus *video,
1976 struct acpi_device *device)
1da177e4 1977{
4be44fcd 1978 int status = 0;
ff102ea9 1979 struct acpi_device *dev;
1da177e4
LT		 1980
1981 acpi_video_device_enumerate(video);
1982
ff102ea9 1983 list_for_each_entry(dev, &device->children, node) {
1da177e4
LT		 1984
1985 status = acpi_video_bus_get_one_device(dev, video);
1986 if (ACPI_FAILURE(status)) {
55ac9a01
LM		 1987 printk(KERN_WARNING PREFIX
1988 "Cant attach device");
1da177e4
LT		 1989 continue;
1990 }
1da177e4 1991 }
d550d98d 1992 return status;
1da177e4
LT		 1993}
1994
4be44fcd 1995static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1da177e4 1996{
031ec77b 1997 acpi_status status;
1da177e4
LT		 1998 struct acpi_video_bus *video;
1999
1da177e4
LT		 2000
2001 if (!device || !device->video)
d550d98d 2002 return -ENOENT;
1da177e4
LT		 2003
2004 video = device->video;
2005
1da177e4
LT		 2006 acpi_video_device_remove_fs(device->dev);
2007
90130268 2008 status = acpi_remove_notify_handler(device->dev->handle,
4be44fcd
LB		 2009 ACPI_DEVICE_NOTIFY,
2010 acpi_video_device_notify);
056c308d 2011 sysfs_remove_link(&device->backlight->dev.kobj, "device");
599a52d1 2012 backlight_device_unregister(device->backlight);
702ed512
ZR		 2013 if (device->cdev) {
2014 sysfs_remove_link(&device->dev->dev.kobj,
2015 "thermal_cooling");
2016 sysfs_remove_link(&device->cdev->device.kobj,
2017 "device");
2018 thermal_cooling_device_unregister(device->cdev);
2019 device->cdev = NULL;
2020 }
23b0f015 2021 video_output_unregister(device->output_dev);
ff102ea9 2022
d550d98d 2023 return 0;
1da177e4
LT		 2024}
2025
4be44fcd 2026static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1da177e4 2027{
4be44fcd 2028 int status;
ff102ea9 2029 struct acpi_video_device *dev, *next;
1da177e4 2030
bbac81f5 2031 mutex_lock(&video->device_list_lock);
1da177e4 2032
ff102ea9 2033 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1da177e4 2034
ff102ea9 2035 status = acpi_video_bus_put_one_device(dev);
4be44fcd
LB		 2036 if (ACPI_FAILURE(status))
2037 printk(KERN_WARNING PREFIX
2038 "hhuuhhuu bug in acpi video driver.\n");
1da177e4 2039
ff102ea9
DT		 2040 if (dev->brightness) {
2041 kfree(dev->brightness->levels);
2042 kfree(dev->brightness);
2043 }
2044 list_del(&dev->entry);
2045 kfree(dev);
1da177e4
LT		 2046 }
2047
bbac81f5 2048 mutex_unlock(&video->device_list_lock);
ff102ea9 2049
d550d98d 2050 return 0;
1da177e4
LT		 2051}
2052
2053/* acpi_video interface */
2054
4be44fcd 2055static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1da177e4 2056{
a21101c4 2057 return acpi_video_bus_DOS(video, 0, 0);
1da177e4
LT		 2058}
2059
4be44fcd 2060static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1da177e4
LT		 2061{
2062 return acpi_video_bus_DOS(video, 0, 1);
2063}
2064
7015558f 2065static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
1da177e4 2066{
7015558f 2067 struct acpi_video_bus *video = acpi_driver_data(device);
e9dab196
LY		 2068 struct input_dev *input;
2069 int keycode;
2070
1da177e4 2071 if (!video)
d550d98d 2072 return;
1da177e4 2073
e9dab196 2074 input = video->input;
1da177e4
LT		 2075
2076 switch (event) {
98fb8fe1 2077 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1da177e4 2078 * most likely via hotkey. */
14e04fb3 2079 acpi_bus_generate_proc_event(device, event, 0);
e9dab196 2080 keycode = KEY_SWITCHVIDEOMODE;
1da177e4
LT		 2081 break;
2082
98fb8fe1 2083 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1da177e4
LT		 2084 * connector. */
2085 acpi_video_device_enumerate(video);
2086 acpi_video_device_rebind(video);
14e04fb3 2087 acpi_bus_generate_proc_event(device, event, 0);
e9dab196 2088 keycode = KEY_SWITCHVIDEOMODE;
1da177e4
LT		 2089 break;
2090
4be44fcd 2091 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
25c87f7f 2092 acpi_bus_generate_proc_event(device, event, 0);
e9dab196
LY		 2093 keycode = KEY_SWITCHVIDEOMODE;
2094 break;
4be44fcd 2095 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
25c87f7f 2096 acpi_bus_generate_proc_event(device, event, 0);
e9dab196
LY		 2097 keycode = KEY_VIDEO_NEXT;
2098 break;
4be44fcd 2099 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
14e04fb3 2100 acpi_bus_generate_proc_event(device, event, 0);
e9dab196 2101 keycode = KEY_VIDEO_PREV;
1da177e4
LT		 2102 break;
2103
2104 default:
e9dab196 2105 keycode = KEY_UNKNOWN;
1da177e4 2106 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd 2107 "Unsupported event [0x%x]\n", event));
1da177e4
LT		 2108 break;
2109 }
2110
7761f638 2111 acpi_notifier_call_chain(device, event, 0);
e9dab196
LY		 2112 input_report_key(input, keycode, 1);
2113 input_sync(input);
2114 input_report_key(input, keycode, 0);
2115 input_sync(input);
2116
d550d98d 2117 return;
1da177e4
LT		 2118}
2119
4be44fcd 2120static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1da177e4 2121{
50dd0969 2122 struct acpi_video_device *video_device = data;
4be44fcd 2123 struct acpi_device *device = NULL;
e9dab196
LY		 2124 struct acpi_video_bus *bus;
2125 struct input_dev *input;
2126 int keycode;
1da177e4 2127
1da177e4 2128 if (!video_device)
d550d98d 2129 return;
1da177e4 2130
e6afa0de 2131 device = video_device->dev;
e9dab196
LY		 2132 bus = video_device->video;
2133 input = bus->input;
1da177e4
LT		 2134
2135 switch (event) {
4be44fcd 2136 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
8a681a4d
ZR		 2137 if (brightness_switch_enabled)
2138 acpi_video_switch_brightness(video_device, event);
14e04fb3 2139 acpi_bus_generate_proc_event(device, event, 0);
e9dab196
LY		 2140 keycode = KEY_BRIGHTNESS_CYCLE;
2141 break;
4be44fcd 2142 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
8a681a4d
ZR		 2143 if (brightness_switch_enabled)
2144 acpi_video_switch_brightness(video_device, event);
25c87f7f 2145 acpi_bus_generate_proc_event(device, event, 0);
e9dab196
LY		 2146 keycode = KEY_BRIGHTNESSUP;
2147 break;
4be44fcd 2148 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
8a681a4d
ZR		 2149 if (brightness_switch_enabled)
2150 acpi_video_switch_brightness(video_device, event);
25c87f7f 2151 acpi_bus_generate_proc_event(device, event, 0);
e9dab196
LY		 2152 keycode = KEY_BRIGHTNESSDOWN;
2153 break;
4be44fcd 2154 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
8a681a4d
ZR		 2155 if (brightness_switch_enabled)
2156 acpi_video_switch_brightness(video_device, event);
25c87f7f 2157 acpi_bus_generate_proc_event(device, event, 0);
e9dab196
LY		 2158 keycode = KEY_BRIGHTNESS_ZERO;
2159 break;
4be44fcd 2160 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
8a681a4d
ZR		 2161 if (brightness_switch_enabled)
2162 acpi_video_switch_brightness(video_device, event);
14e04fb3 2163 acpi_bus_generate_proc_event(device, event, 0);
e9dab196 2164 keycode = KEY_DISPLAY_OFF;
1da177e4
LT		 2165 break;
2166 default:
e9dab196 2167 keycode = KEY_UNKNOWN;
1da177e4 2168 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd 2169 "Unsupported event [0x%x]\n", event));
1da177e4
LT		 2170 break;
2171 }
e9dab196 2172
7761f638 2173 acpi_notifier_call_chain(device, event, 0);
e9dab196
LY		 2174 input_report_key(input, keycode, 1);
2175 input_sync(input);
2176 input_report_key(input, keycode, 0);
2177 input_sync(input);
2178
d550d98d 2179 return;
1da177e4
LT		 2180}
2181
e6d9da1d 2182static int instance;
863c1490
MG		 2183static int acpi_video_resume(struct acpi_device *device)
2184{
2185 struct acpi_video_bus *video;
2186 struct acpi_video_device *video_device;
2187 int i;
2188
2189 if (!device || !acpi_driver_data(device))
2190 return -EINVAL;
2191
2192 video = acpi_driver_data(device);
2193
2194 for (i = 0; i < video->attached_count; i++) {
2195 video_device = video->attached_array[i].bind_info;
2196 if (video_device && video_device->backlight)
2197 acpi_video_set_brightness(video_device->backlight);
2198 }
2199 return AE_OK;
2200}
2201
4be44fcd 2202static int acpi_video_bus_add(struct acpi_device *device)
1da177e4 2203{
f51e8391 2204 struct acpi_video_bus *video;
e9dab196 2205 struct input_dev *input;
f51e8391 2206 int error;
1da177e4 2207
36bcbec7 2208 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1da177e4 2209 if (!video)
d550d98d 2210 return -ENOMEM;
1da177e4 2211
e6d9da1d
ZR		 2212 /* a hack to fix the duplicate name "VID" problem on T61 */
2213 if (!strcmp(device->pnp.bus_id, "VID")) {
2214 if (instance)
2215 device->pnp.bus_id[3] = '0' + instance;
2216 instance ++;
2217 }
f3b39f13
ZY		 2218 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2219 if (!strcmp(device->pnp.bus_id, "VGA")) {
2220 if (instance)
2221 device->pnp.bus_id[3] = '0' + instance;
2222 instance++;
2223 }
e6d9da1d 2224
e6afa0de 2225 video->device = device;
1da177e4
LT		 2226 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2227 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
db89b4f0 2228 device->driver_data = video;
1da177e4
LT		 2229
2230 acpi_video_bus_find_cap(video);
f51e8391
DT		 2231 error = acpi_video_bus_check(video);
2232 if (error)
2233 goto err_free_video;
1da177e4 2234
f51e8391
DT		 2235 error = acpi_video_bus_add_fs(device);
2236 if (error)
2237 goto err_free_video;
1da177e4 2238
bbac81f5 2239 mutex_init(&video->device_list_lock);
1da177e4
LT		 2240 INIT_LIST_HEAD(&video->video_device_list);
2241
2242 acpi_video_bus_get_devices(video, device);
2243 acpi_video_bus_start_devices(video);
2244
e9dab196 2245 video->input = input = input_allocate_device();
f51e8391
DT		 2246 if (!input) {
2247 error = -ENOMEM;
7015558f 2248 goto err_stop_video;
f51e8391 2249 }
e9dab196
LY		 2250
2251 snprintf(video->phys, sizeof(video->phys),
2252 "%s/video/input0", acpi_device_hid(video->device));
2253
2254 input->name = acpi_device_name(video->device);
2255 input->phys = video->phys;
2256 input->id.bustype = BUS_HOST;
2257 input->id.product = 0x06;
91c05c66 2258 input->dev.parent = &device->dev;
e9dab196
LY		 2259 input->evbit[0] = BIT(EV_KEY);
2260 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2261 set_bit(KEY_VIDEO_NEXT, input->keybit);
2262 set_bit(KEY_VIDEO_PREV, input->keybit);
2263 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2264 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2265 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2266 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2267 set_bit(KEY_DISPLAY_OFF, input->keybit);
2268 set_bit(KEY_UNKNOWN, input->keybit);
e9dab196 2269
f51e8391
DT		 2270 error = input_register_device(input);
2271 if (error)
2272 goto err_free_input_dev;
e9dab196 2273
1da177e4 2274 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
4be44fcd
LB		 2275 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2276 video->flags.multihead ? "yes" : "no",
2277 video->flags.rom ? "yes" : "no",
2278 video->flags.post ? "yes" : "no");
1da177e4 2279
f51e8391
DT		 2280 return 0;
2281
2282 err_free_input_dev:
2283 input_free_device(input);
f51e8391
DT		 2284 err_stop_video:
2285 acpi_video_bus_stop_devices(video);
2286 acpi_video_bus_put_devices(video);
2287 kfree(video->attached_array);
2288 acpi_video_bus_remove_fs(device);
2289 err_free_video:
2290 kfree(video);
db89b4f0 2291 device->driver_data = NULL;
1da177e4 2292
f51e8391 2293 return error;
1da177e4
LT		 2294}
2295
4be44fcd 2296static int acpi_video_bus_remove(struct acpi_device *device, int type)
1da177e4 2297{
4be44fcd 2298 struct acpi_video_bus *video = NULL;
1da177e4 2299
1da177e4
LT		 2300
2301 if (!device || !acpi_driver_data(device))
d550d98d 2302 return -EINVAL;
1da177e4 2303
50dd0969 2304 video = acpi_driver_data(device);
1da177e4
LT		 2305
2306 acpi_video_bus_stop_devices(video);
1da177e4
LT		 2307 acpi_video_bus_put_devices(video);
2308 acpi_video_bus_remove_fs(device);
2309
e9dab196 2310 input_unregister_device(video->input);
6044ec88 2311 kfree(video->attached_array);
1da177e4
LT		 2312 kfree(video);
2313
d550d98d 2314 return 0;
1da177e4
LT		 2315}
2316
74a365b3
MG		 2317static int __init intel_opregion_present(void)
2318{
2319#if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2320 struct pci_dev *dev = NULL;
2321 u32 address;
2322
2323 for_each_pci_dev(dev) {
2324 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2325 continue;
2326 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2327 continue;
2328 pci_read_config_dword(dev, 0xfc, &address);
2329 if (!address)
2330 continue;
2331 return 1;
2332 }
2333#endif
2334 return 0;
2335}
2336
2337int acpi_video_register(void)
1da177e4 2338{
4be44fcd 2339 int result = 0;
86e437f0
ZY		 2340 if (register_count) {
2341 /*
2342 * if the function of acpi_video_register is already called,
2343 * don't register the acpi_vide_bus again and return no error.
2344 */
2345 return 0;
2346 }
1da177e4 2347
1da177e4
LT		 2348 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2349 if (!acpi_video_dir)
d550d98d 2350 return -ENODEV;
1da177e4
LT		 2351
2352 result = acpi_bus_register_driver(&acpi_video_bus);
2353 if (result < 0) {
2354 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
d550d98d 2355 return -ENODEV;
1da177e4
LT		 2356 }
2357
86e437f0
ZY		 2358 /*
2359 * When the acpi_video_bus is loaded successfully, increase
2360 * the counter reference.
2361 */
2362 register_count = 1;
2363
d550d98d 2364 return 0;
1da177e4 2365}
74a365b3
MG		 2366EXPORT_SYMBOL(acpi_video_register);
2367
86e437f0
ZY		 2368void acpi_video_unregister(void)
2369{
2370 if (!register_count) {
2371 /*
2372 * If the acpi video bus is already unloaded, don't
2373 * unload it again and return directly.
2374 */
2375 return;
2376 }
2377 acpi_bus_unregister_driver(&acpi_video_bus);
2378
2379 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2380
2381 register_count = 0;
2382
2383 return;
2384}
2385EXPORT_SYMBOL(acpi_video_unregister);
2386
74a365b3
MG		 2387/*
2388 * This is kind of nasty. Hardware using Intel chipsets may require
2389 * the video opregion code to be run first in order to initialise
2390 * state before any ACPI video calls are made. To handle this we defer
2391 * registration of the video class until the opregion code has run.
2392 */
2393
2394static int __init acpi_video_init(void)
2395{
45cb50e6
ZR		 2396 dmi_check_system(video_dmi_table);
2397
74a365b3
MG		 2398 if (intel_opregion_present())
2399 return 0;
2400
2401 return acpi_video_register();
2402}
1da177e4 2403
86e437f0 2404static void __exit acpi_video_exit(void)
1da177e4 2405{
86e437f0 2406 acpi_video_unregister();
1da177e4 2407
d550d98d 2408 return;
1da177e4
LT		 2409}
2410
2411module_init(acpi_video_init);
2412module_exit(acpi_video_exit);
Linux kernel - Deliverables
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