2 * video.c - ACPI Video Driver ($Revision:$)
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <linux/sort.h>
40 #include <linux/pci.h>
41 #include <linux/pci_ids.h>
42 #include <asm/uaccess.h>
44 #include <acpi/acpi_bus.h>
45 #include <acpi/acpi_drivers.h>
47 #define ACPI_VIDEO_CLASS "video"
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
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
62 #define MAX_NAME_LEN 20
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
69 #define _COMPONENT ACPI_VIDEO_COMPONENT
70 ACPI_MODULE_NAME("video");
72 MODULE_AUTHOR("Bruno Ducrot");
73 MODULE_DESCRIPTION("ACPI Video Driver");
74 MODULE_LICENSE("GPL");
76 static int brightness_switch_enabled
= 1;
77 module_param(brightness_switch_enabled
, bool, 0644);
79 static int acpi_video_bus_add(struct acpi_device
*device
);
80 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
);
81 static int acpi_video_resume(struct acpi_device
*device
);
82 static void acpi_video_bus_notify(struct acpi_device
*device
, u32 event
);
84 static const struct acpi_device_id video_device_ids
[] = {
88 MODULE_DEVICE_TABLE(acpi
, video_device_ids
);
90 static struct acpi_driver acpi_video_bus
= {
92 .class = ACPI_VIDEO_CLASS
,
93 .ids
= video_device_ids
,
95 .add
= acpi_video_bus_add
,
96 .remove
= acpi_video_bus_remove
,
97 .resume
= acpi_video_resume
,
98 .notify
= acpi_video_bus_notify
,
102 struct acpi_video_bus_flags
{
103 u8 multihead
:1; /* can switch video heads */
104 u8 rom
:1; /* can retrieve a video rom */
105 u8 post
:1; /* can configure the head to */
109 struct acpi_video_bus_cap
{
110 u8 _DOS
:1; /*Enable/Disable output switching */
111 u8 _DOD
:1; /*Enumerate all devices attached to display adapter */
112 u8 _ROM
:1; /*Get ROM Data */
113 u8 _GPD
:1; /*Get POST Device */
114 u8 _SPD
:1; /*Set POST Device */
115 u8 _VPO
:1; /*Video POST Options */
119 struct acpi_video_device_attrib
{
120 u32 display_index
:4; /* A zero-based instance of the Display */
121 u32 display_port_attachment
:4; /*This field differentiates the display type */
122 u32 display_type
:4; /*Describe the specific type in use */
123 u32 vendor_specific
:4; /*Chipset Vendor Specific */
124 u32 bios_can_detect
:1; /*BIOS can detect the device */
125 u32 depend_on_vga
:1; /*Non-VGA output device whose power is related to
127 u32 pipe_id
:3; /*For VGA multiple-head devices. */
128 u32 reserved
:10; /*Must be 0 */
129 u32 device_id_scheme
:1; /*Device ID Scheme */
132 struct acpi_video_enumerated_device
{
135 struct acpi_video_device_attrib attrib
;
137 struct acpi_video_device
*bind_info
;
140 struct acpi_video_bus
{
141 struct acpi_device
*device
;
143 struct acpi_video_enumerated_device
*attached_array
;
145 struct acpi_video_bus_cap cap
;
146 struct acpi_video_bus_flags flags
;
147 struct list_head video_device_list
;
148 struct mutex device_list_lock
; /* protects video_device_list */
149 struct proc_dir_entry
*dir
;
150 struct input_dev
*input
;
151 char phys
[32]; /* for input device */
154 struct acpi_video_device_flags
{
164 struct acpi_video_device_cap
{
165 u8 _ADR
:1; /*Return the unique ID */
166 u8 _BCL
:1; /*Query list of brightness control levels supported */
167 u8 _BCM
:1; /*Set the brightness level */
168 u8 _BQC
:1; /* Get current brightness level */
169 u8 _BCQ
:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
170 u8 _DDC
:1; /*Return the EDID for this device */
171 u8 _DCS
:1; /*Return status of output device */
172 u8 _DGS
:1; /*Query graphics state */
173 u8 _DSS
:1; /*Device state set */
176 struct acpi_video_brightness_flags
{
177 u8 _BCL_no_ac_battery_levels
:1; /* no AC/Battery levels in _BCL */
178 u8 _BCL_reversed
:1; /* _BCL package is in a reversed order*/
179 u8 _BCL_use_index
:1; /* levels in _BCL are index values */
180 u8 _BCM_use_index
:1; /* input of _BCM is an index value */
181 u8 _BQC_use_index
:1; /* _BQC returns an index value */
184 struct acpi_video_device_brightness
{
188 struct acpi_video_brightness_flags flags
;
191 struct acpi_video_device
{
192 unsigned long device_id
;
193 struct acpi_video_device_flags flags
;
194 struct acpi_video_device_cap cap
;
195 struct list_head entry
;
196 struct acpi_video_bus
*video
;
197 struct acpi_device
*dev
;
198 struct acpi_video_device_brightness
*brightness
;
199 struct backlight_device
*backlight
;
200 struct thermal_cooling_device
*cdev
;
201 struct output_device
*output_dev
;
205 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
);
206 static const struct file_operations acpi_video_bus_info_fops
= {
207 .owner
= THIS_MODULE
,
208 .open
= acpi_video_bus_info_open_fs
,
211 .release
= single_release
,
214 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
);
215 static const struct file_operations acpi_video_bus_ROM_fops
= {
216 .owner
= THIS_MODULE
,
217 .open
= acpi_video_bus_ROM_open_fs
,
220 .release
= single_release
,
223 static int acpi_video_bus_POST_info_open_fs(struct inode
*inode
,
225 static const struct file_operations acpi_video_bus_POST_info_fops
= {
226 .owner
= THIS_MODULE
,
227 .open
= acpi_video_bus_POST_info_open_fs
,
230 .release
= single_release
,
233 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
);
234 static ssize_t
acpi_video_bus_write_POST(struct file
*file
,
235 const char __user
*buffer
, size_t count
, loff_t
*data
);
236 static const struct file_operations acpi_video_bus_POST_fops
= {
237 .owner
= THIS_MODULE
,
238 .open
= acpi_video_bus_POST_open_fs
,
240 .write
= acpi_video_bus_write_POST
,
242 .release
= single_release
,
245 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
);
246 static ssize_t
acpi_video_bus_write_DOS(struct file
*file
,
247 const char __user
*buffer
, size_t count
, loff_t
*data
);
248 static const struct file_operations acpi_video_bus_DOS_fops
= {
249 .owner
= THIS_MODULE
,
250 .open
= acpi_video_bus_DOS_open_fs
,
252 .write
= acpi_video_bus_write_DOS
,
254 .release
= single_release
,
258 static int acpi_video_device_info_open_fs(struct inode
*inode
,
260 static const struct file_operations acpi_video_device_info_fops
= {
261 .owner
= THIS_MODULE
,
262 .open
= acpi_video_device_info_open_fs
,
265 .release
= single_release
,
268 static int acpi_video_device_state_open_fs(struct inode
*inode
,
270 static ssize_t
acpi_video_device_write_state(struct file
*file
,
271 const char __user
*buffer
, size_t count
, loff_t
*data
);
272 static const struct file_operations acpi_video_device_state_fops
= {
273 .owner
= THIS_MODULE
,
274 .open
= acpi_video_device_state_open_fs
,
276 .write
= acpi_video_device_write_state
,
278 .release
= single_release
,
281 static int acpi_video_device_brightness_open_fs(struct inode
*inode
,
283 static ssize_t
acpi_video_device_write_brightness(struct file
*file
,
284 const char __user
*buffer
, size_t count
, loff_t
*data
);
285 static struct file_operations acpi_video_device_brightness_fops
= {
286 .owner
= THIS_MODULE
,
287 .open
= acpi_video_device_brightness_open_fs
,
289 .write
= acpi_video_device_write_brightness
,
291 .release
= single_release
,
294 static int acpi_video_device_EDID_open_fs(struct inode
*inode
,
296 static const struct file_operations acpi_video_device_EDID_fops
= {
297 .owner
= THIS_MODULE
,
298 .open
= acpi_video_device_EDID_open_fs
,
301 .release
= single_release
,
304 static const char device_decode
[][30] = {
305 "motherboard VGA device",
311 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
);
312 static void acpi_video_device_rebind(struct acpi_video_bus
*video
);
313 static void acpi_video_device_bind(struct acpi_video_bus
*video
,
314 struct acpi_video_device
*device
);
315 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
);
316 static int acpi_video_device_lcd_set_level(struct acpi_video_device
*device
,
318 static int acpi_video_device_lcd_get_level_current(
319 struct acpi_video_device
*device
,
320 unsigned long long *level
);
321 static int acpi_video_get_next_level(struct acpi_video_device
*device
,
322 u32 level_current
, u32 event
);
323 static int acpi_video_switch_brightness(struct acpi_video_device
*device
,
325 static int acpi_video_device_get_state(struct acpi_video_device
*device
,
326 unsigned long long *state
);
327 static int acpi_video_output_get(struct output_device
*od
);
328 static int acpi_video_device_set_state(struct acpi_video_device
*device
, int state
);
330 /*backlight device sysfs support*/
331 static int acpi_video_get_brightness(struct backlight_device
*bd
)
333 unsigned long long cur_level
;
335 struct acpi_video_device
*vd
=
336 (struct acpi_video_device
*)bl_get_data(bd
);
338 if (acpi_video_device_lcd_get_level_current(vd
, &cur_level
))
340 for (i
= 2; i
< vd
->brightness
->count
; i
++) {
341 if (vd
->brightness
->levels
[i
] == cur_level
)
342 /* The first two entries are special - see page 575
343 of the ACPI spec 3.0 */
349 static int acpi_video_set_brightness(struct backlight_device
*bd
)
351 int request_level
= bd
->props
.brightness
+ 2;
352 struct acpi_video_device
*vd
=
353 (struct acpi_video_device
*)bl_get_data(bd
);
355 return acpi_video_device_lcd_set_level(vd
,
356 vd
->brightness
->levels
[request_level
]);
359 static struct backlight_ops acpi_backlight_ops
= {
360 .get_brightness
= acpi_video_get_brightness
,
361 .update_status
= acpi_video_set_brightness
,
364 /*video output device sysfs support*/
365 static int acpi_video_output_get(struct output_device
*od
)
367 unsigned long long state
;
368 struct acpi_video_device
*vd
=
369 (struct acpi_video_device
*)dev_get_drvdata(&od
->dev
);
370 acpi_video_device_get_state(vd
, &state
);
374 static int acpi_video_output_set(struct output_device
*od
)
376 unsigned long state
= od
->request_state
;
377 struct acpi_video_device
*vd
=
378 (struct acpi_video_device
*)dev_get_drvdata(&od
->dev
);
379 return acpi_video_device_set_state(vd
, state
);
382 static struct output_properties acpi_output_properties
= {
383 .set_state
= acpi_video_output_set
,
384 .get_status
= acpi_video_output_get
,
388 /* thermal cooling device callbacks */
389 static int video_get_max_state(struct thermal_cooling_device
*cdev
, unsigned
392 struct acpi_device
*device
= cdev
->devdata
;
393 struct acpi_video_device
*video
= acpi_driver_data(device
);
395 *state
= video
->brightness
->count
- 3;
399 static int video_get_cur_state(struct thermal_cooling_device
*cdev
, unsigned
402 struct acpi_device
*device
= cdev
->devdata
;
403 struct acpi_video_device
*video
= acpi_driver_data(device
);
404 unsigned long long level
;
407 if (acpi_video_device_lcd_get_level_current(video
, &level
))
409 for (offset
= 2; offset
< video
->brightness
->count
; offset
++)
410 if (level
== video
->brightness
->levels
[offset
]) {
411 *state
= video
->brightness
->count
- offset
- 1;
419 video_set_cur_state(struct thermal_cooling_device
*cdev
, unsigned long state
)
421 struct acpi_device
*device
= cdev
->devdata
;
422 struct acpi_video_device
*video
= acpi_driver_data(device
);
425 if ( state
>= video
->brightness
->count
- 2)
428 state
= video
->brightness
->count
- state
;
429 level
= video
->brightness
->levels
[state
-1];
430 return acpi_video_device_lcd_set_level(video
, level
);
433 static struct thermal_cooling_device_ops video_cooling_ops
= {
434 .get_max_state
= video_get_max_state
,
435 .get_cur_state
= video_get_cur_state
,
436 .set_cur_state
= video_set_cur_state
,
439 /* --------------------------------------------------------------------------
441 -------------------------------------------------------------------------- */
446 acpi_video_device_query(struct acpi_video_device
*device
, unsigned long long *state
)
450 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DGS", NULL
, state
);
456 acpi_video_device_get_state(struct acpi_video_device
*device
,
457 unsigned long long *state
)
461 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DCS", NULL
, state
);
467 acpi_video_device_set_state(struct acpi_video_device
*device
, int state
)
470 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
471 struct acpi_object_list args
= { 1, &arg0
};
472 unsigned long long ret
;
475 arg0
.integer
.value
= state
;
476 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DSS", &args
, &ret
);
482 acpi_video_device_lcd_query_levels(struct acpi_video_device
*device
,
483 union acpi_object
**levels
)
486 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
487 union acpi_object
*obj
;
492 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCL", NULL
, &buffer
);
493 if (!ACPI_SUCCESS(status
))
495 obj
= (union acpi_object
*)buffer
.pointer
;
496 if (!obj
|| (obj
->type
!= ACPI_TYPE_PACKAGE
)) {
497 printk(KERN_ERR PREFIX
"Invalid _BCL data\n");
507 kfree(buffer
.pointer
);
513 acpi_video_device_lcd_set_level(struct acpi_video_device
*device
, int level
)
516 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
517 struct acpi_object_list args
= { 1, &arg0
};
520 arg0
.integer
.value
= level
;
522 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCM",
524 if (ACPI_FAILURE(status
)) {
525 ACPI_ERROR((AE_INFO
, "Evaluating _BCM failed"));
529 device
->brightness
->curr
= level
;
530 for (state
= 2; state
< device
->brightness
->count
; state
++)
531 if (level
== device
->brightness
->levels
[state
]) {
532 if (device
->backlight
)
533 device
->backlight
->props
.brightness
= state
- 2;
537 ACPI_ERROR((AE_INFO
, "Current brightness invalid"));
542 acpi_video_device_lcd_get_level_current(struct acpi_video_device
*device
,
543 unsigned long long *level
)
545 acpi_status status
= AE_OK
;
547 if (device
->cap
._BQC
|| device
->cap
._BCQ
) {
548 char *buf
= device
->cap
._BQC
? "_BQC" : "_BCQ";
550 status
= acpi_evaluate_integer(device
->dev
->handle
, buf
,
552 if (ACPI_SUCCESS(status
)) {
553 if (device
->brightness
->flags
._BQC_use_index
) {
554 if (device
->brightness
->flags
._BCL_reversed
)
555 *level
= device
->brightness
->count
557 *level
= device
->brightness
->levels
[*level
+ 2];
560 device
->brightness
->curr
= *level
;
564 * should we return an error or ignore this failure?
565 * dev->brightness->curr is a cached value which stores
566 * the correct current backlight level in most cases.
567 * ACPI video backlight still works w/ buggy _BQC.
568 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
570 ACPI_WARNING((AE_INFO
, "Evaluating %s failed", buf
));
571 device
->cap
._BQC
= device
->cap
._BCQ
= 0;
575 *level
= device
->brightness
->curr
;
580 acpi_video_device_EDID(struct acpi_video_device
*device
,
581 union acpi_object
**edid
, ssize_t length
)
584 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
585 union acpi_object
*obj
;
586 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
587 struct acpi_object_list args
= { 1, &arg0
};
595 arg0
.integer
.value
= 1;
596 else if (length
== 256)
597 arg0
.integer
.value
= 2;
601 status
= acpi_evaluate_object(device
->dev
->handle
, "_DDC", &args
, &buffer
);
602 if (ACPI_FAILURE(status
))
605 obj
= buffer
.pointer
;
607 if (obj
&& obj
->type
== ACPI_TYPE_BUFFER
)
610 printk(KERN_ERR PREFIX
"Invalid _DDC data\n");
621 acpi_video_bus_set_POST(struct acpi_video_bus
*video
, unsigned long option
)
624 unsigned long long tmp
;
625 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
626 struct acpi_object_list args
= { 1, &arg0
};
629 arg0
.integer
.value
= option
;
631 status
= acpi_evaluate_integer(video
->device
->handle
, "_SPD", &args
, &tmp
);
632 if (ACPI_SUCCESS(status
))
633 status
= tmp
? (-EINVAL
) : (AE_OK
);
639 acpi_video_bus_get_POST(struct acpi_video_bus
*video
, unsigned long long *id
)
643 status
= acpi_evaluate_integer(video
->device
->handle
, "_GPD", NULL
, id
);
649 acpi_video_bus_POST_options(struct acpi_video_bus
*video
,
650 unsigned long long *options
)
654 status
= acpi_evaluate_integer(video
->device
->handle
, "_VPO", NULL
, options
);
662 * video : video bus device pointer
664 * 0. The system BIOS should NOT automatically switch(toggle)
665 * the active display output.
666 * 1. The system BIOS should automatically switch (toggle) the
667 * active display output. No switch event.
668 * 2. The _DGS value should be locked.
669 * 3. The system BIOS should not automatically switch (toggle) the
670 * active display output, but instead generate the display switch
673 * 0. The system BIOS should automatically control the brightness level
674 * of the LCD when the power changes from AC to DC
675 * 1. The system BIOS should NOT automatically control the brightness
676 * level of the LCD when the power changes from AC to DC.
682 acpi_video_bus_DOS(struct acpi_video_bus
*video
, int bios_flag
, int lcd_flag
)
684 acpi_integer status
= 0;
685 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
686 struct acpi_object_list args
= { 1, &arg0
};
689 if (bios_flag
< 0 || bios_flag
> 3 || lcd_flag
< 0 || lcd_flag
> 1) {
693 arg0
.integer
.value
= (lcd_flag
<< 2) | bios_flag
;
694 video
->dos_setting
= arg0
.integer
.value
;
695 acpi_evaluate_object(video
->device
->handle
, "_DOS", &args
, NULL
);
702 * Simple comparison function used to sort backlight levels.
706 acpi_video_cmp_level(const void *a
, const void *b
)
708 return *(int *)a
- *(int *)b
;
713 * device : video output device (LCD, CRT, ..)
716 * Maximum brightness level
718 * Allocate and initialize device->brightness.
722 acpi_video_init_brightness(struct acpi_video_device
*device
)
724 union acpi_object
*obj
= NULL
;
725 int i
, max_level
= 0, count
= 0, level_ac_battery
= 0;
726 unsigned long long level
, level_old
;
727 union acpi_object
*o
;
728 struct acpi_video_device_brightness
*br
= NULL
;
729 int result
= -EINVAL
;
731 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device
, &obj
))) {
732 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Could not query available "
733 "LCD brightness level\n"));
737 if (obj
->package
.count
< 2)
740 br
= kzalloc(sizeof(*br
), GFP_KERNEL
);
742 printk(KERN_ERR
"can't allocate memory\n");
747 br
->levels
= kmalloc((obj
->package
.count
+ 2) * sizeof *(br
->levels
),
754 for (i
= 0; i
< obj
->package
.count
; i
++) {
755 o
= (union acpi_object
*)&obj
->package
.elements
[i
];
756 if (o
->type
!= ACPI_TYPE_INTEGER
) {
757 printk(KERN_ERR PREFIX
"Invalid data\n");
760 br
->levels
[count
] = (u32
) o
->integer
.value
;
762 if (br
->levels
[count
] > max_level
)
763 max_level
= br
->levels
[count
];
768 * some buggy BIOS don't export the levels
769 * when machine is on AC/Battery in _BCL package.
770 * In this case, the first two elements in _BCL packages
771 * are also supported brightness levels that OS should take care of.
773 for (i
= 2; i
< count
; i
++) {
774 if (br
->levels
[i
] == br
->levels
[0])
776 if (br
->levels
[i
] == br
->levels
[1])
780 if (level_ac_battery
< 2) {
781 level_ac_battery
= 2 - level_ac_battery
;
782 br
->flags
._BCL_no_ac_battery_levels
= 1;
783 for (i
= (count
- 1 + level_ac_battery
); i
>= 2; i
--)
784 br
->levels
[i
] = br
->levels
[i
- level_ac_battery
];
785 count
+= level_ac_battery
;
786 } else if (level_ac_battery
> 2)
787 ACPI_ERROR((AE_INFO
, "Too many duplicates in _BCL package\n"));
789 /* Check if the _BCL package is in a reversed order */
790 if (max_level
== br
->levels
[2]) {
791 br
->flags
._BCL_reversed
= 1;
792 sort(&br
->levels
[2], count
- 2, sizeof(br
->levels
[2]),
793 acpi_video_cmp_level
, NULL
);
794 } else if (max_level
!= br
->levels
[count
- 1])
796 "Found unordered _BCL package\n"));
799 device
->brightness
= br
;
801 /* Check the input/output of _BQC/_BCL/_BCM */
802 if ((max_level
< 100) && (max_level
<= (count
- 2)))
803 br
->flags
._BCL_use_index
= 1;
806 * _BCM is always consistent with _BCL,
807 * at least for all the laptops we have ever seen.
809 br
->flags
._BCM_use_index
= br
->flags
._BCL_use_index
;
811 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
812 br
->curr
= level_old
= max_level
;
814 if (!device
->cap
._BQC
)
817 result
= acpi_video_device_lcd_get_level_current(device
, &level_old
);
819 goto out_free_levels
;
822 * Set the level to maximum and check if _BQC uses indexed value
824 result
= acpi_video_device_lcd_set_level(device
, max_level
);
826 goto out_free_levels
;
828 result
= acpi_video_device_lcd_get_level_current(device
, &level
);
830 goto out_free_levels
;
832 br
->flags
._BQC_use_index
= (level
== max_level
? 0 : 1);
834 if (!br
->flags
._BQC_use_index
)
837 if (br
->flags
._BCL_reversed
)
838 level_old
= (br
->count
- 1) - level_old
;
839 level_old
= br
->levels
[level_old
];
842 result
= acpi_video_device_lcd_set_level(device
, level_old
);
844 goto out_free_levels
;
846 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
847 "found %d brightness levels\n", count
- 2));
856 device
->brightness
= NULL
;
863 * device : video output device (LCD, CRT, ..)
868 * Find out all required AML methods defined under the output
872 static void acpi_video_device_find_cap(struct acpi_video_device
*device
)
874 acpi_handle h_dummy1
;
877 memset(&device
->cap
, 0, sizeof(device
->cap
));
879 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_ADR", &h_dummy1
))) {
880 device
->cap
._ADR
= 1;
882 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCL", &h_dummy1
))) {
883 device
->cap
._BCL
= 1;
885 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCM", &h_dummy1
))) {
886 device
->cap
._BCM
= 1;
888 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
,"_BQC",&h_dummy1
)))
889 device
->cap
._BQC
= 1;
890 else if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCQ",
892 printk(KERN_WARNING FW_BUG
"_BCQ is used instead of _BQC\n");
893 device
->cap
._BCQ
= 1;
896 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DDC", &h_dummy1
))) {
897 device
->cap
._DDC
= 1;
899 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DCS", &h_dummy1
))) {
900 device
->cap
._DCS
= 1;
902 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DGS", &h_dummy1
))) {
903 device
->cap
._DGS
= 1;
905 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DSS", &h_dummy1
))) {
906 device
->cap
._DSS
= 1;
909 if (acpi_video_backlight_support()) {
911 static int count
= 0;
914 result
= acpi_video_init_brightness(device
);
917 name
= kzalloc(MAX_NAME_LEN
, GFP_KERNEL
);
921 sprintf(name
, "acpi_video%d", count
++);
922 device
->backlight
= backlight_device_register(name
,
923 NULL
, device
, &acpi_backlight_ops
);
924 device
->backlight
->props
.max_brightness
= device
->brightness
->count
-3;
927 device
->cdev
= thermal_cooling_device_register("LCD",
928 device
->dev
, &video_cooling_ops
);
929 if (IS_ERR(device
->cdev
))
932 dev_info(&device
->dev
->dev
, "registered as cooling_device%d\n",
934 result
= sysfs_create_link(&device
->dev
->dev
.kobj
,
935 &device
->cdev
->device
.kobj
,
938 printk(KERN_ERR PREFIX
"Create sysfs link\n");
939 result
= sysfs_create_link(&device
->cdev
->device
.kobj
,
940 &device
->dev
->dev
.kobj
, "device");
942 printk(KERN_ERR PREFIX
"Create sysfs link\n");
946 if (acpi_video_display_switch_support()) {
948 if (device
->cap
._DCS
&& device
->cap
._DSS
) {
951 name
= kzalloc(MAX_NAME_LEN
, GFP_KERNEL
);
954 sprintf(name
, "acpi_video%d", count
++);
955 device
->output_dev
= video_output_register(name
,
956 NULL
, device
, &acpi_output_properties
);
964 * device : video output device (VGA)
969 * Find out all required AML methods defined under the video bus device.
972 static void acpi_video_bus_find_cap(struct acpi_video_bus
*video
)
974 acpi_handle h_dummy1
;
976 memset(&video
->cap
, 0, sizeof(video
->cap
));
977 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOS", &h_dummy1
))) {
980 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOD", &h_dummy1
))) {
983 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_ROM", &h_dummy1
))) {
986 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_GPD", &h_dummy1
))) {
989 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_SPD", &h_dummy1
))) {
992 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_VPO", &h_dummy1
))) {
998 * Check whether the video bus device has required AML method to
999 * support the desired features
1002 static int acpi_video_bus_check(struct acpi_video_bus
*video
)
1004 acpi_status status
= -ENOENT
;
1010 dev
= acpi_get_physical_pci_device(video
->device
->handle
);
1015 /* Since there is no HID, CID and so on for VGA driver, we have
1016 * to check well known required nodes.
1019 /* Does this device support video switching? */
1020 if (video
->cap
._DOS
) {
1021 video
->flags
.multihead
= 1;
1025 /* Does this device support retrieving a video ROM? */
1026 if (video
->cap
._ROM
) {
1027 video
->flags
.rom
= 1;
1031 /* Does this device support configuring which video device to POST? */
1032 if (video
->cap
._GPD
&& video
->cap
._SPD
&& video
->cap
._VPO
) {
1033 video
->flags
.post
= 1;
1040 /* --------------------------------------------------------------------------
1041 FS Interface (/proc)
1042 -------------------------------------------------------------------------- */
1044 static struct proc_dir_entry
*acpi_video_dir
;
1048 static int acpi_video_device_info_seq_show(struct seq_file
*seq
, void *offset
)
1050 struct acpi_video_device
*dev
= seq
->private;
1056 seq_printf(seq
, "device_id: 0x%04x\n", (u32
) dev
->device_id
);
1057 seq_printf(seq
, "type: ");
1059 seq_printf(seq
, "CRT\n");
1060 else if (dev
->flags
.lcd
)
1061 seq_printf(seq
, "LCD\n");
1062 else if (dev
->flags
.tvout
)
1063 seq_printf(seq
, "TVOUT\n");
1064 else if (dev
->flags
.dvi
)
1065 seq_printf(seq
, "DVI\n");
1067 seq_printf(seq
, "UNKNOWN\n");
1069 seq_printf(seq
, "known by bios: %s\n", dev
->flags
.bios
? "yes" : "no");
1076 acpi_video_device_info_open_fs(struct inode
*inode
, struct file
*file
)
1078 return single_open(file
, acpi_video_device_info_seq_show
,
1082 static int acpi_video_device_state_seq_show(struct seq_file
*seq
, void *offset
)
1085 struct acpi_video_device
*dev
= seq
->private;
1086 unsigned long long state
;
1092 status
= acpi_video_device_get_state(dev
, &state
);
1093 seq_printf(seq
, "state: ");
1094 if (ACPI_SUCCESS(status
))
1095 seq_printf(seq
, "0x%02llx\n", state
);
1097 seq_printf(seq
, "<not supported>\n");
1099 status
= acpi_video_device_query(dev
, &state
);
1100 seq_printf(seq
, "query: ");
1101 if (ACPI_SUCCESS(status
))
1102 seq_printf(seq
, "0x%02llx\n", state
);
1104 seq_printf(seq
, "<not supported>\n");
1111 acpi_video_device_state_open_fs(struct inode
*inode
, struct file
*file
)
1113 return single_open(file
, acpi_video_device_state_seq_show
,
1118 acpi_video_device_write_state(struct file
*file
,
1119 const char __user
* buffer
,
1120 size_t count
, loff_t
* data
)
1123 struct seq_file
*m
= file
->private_data
;
1124 struct acpi_video_device
*dev
= m
->private;
1125 char str
[12] = { 0 };
1129 if (!dev
|| count
+ 1 > sizeof str
)
1132 if (copy_from_user(str
, buffer
, count
))
1136 state
= simple_strtoul(str
, NULL
, 0);
1137 state
&= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1139 status
= acpi_video_device_set_state(dev
, state
);
1148 acpi_video_device_brightness_seq_show(struct seq_file
*seq
, void *offset
)
1150 struct acpi_video_device
*dev
= seq
->private;
1154 if (!dev
|| !dev
->brightness
) {
1155 seq_printf(seq
, "<not supported>\n");
1159 seq_printf(seq
, "levels: ");
1160 for (i
= 2; i
< dev
->brightness
->count
; i
++)
1161 seq_printf(seq
, " %d", dev
->brightness
->levels
[i
]);
1162 seq_printf(seq
, "\ncurrent: %d\n", dev
->brightness
->curr
);
1168 acpi_video_device_brightness_open_fs(struct inode
*inode
, struct file
*file
)
1170 return single_open(file
, acpi_video_device_brightness_seq_show
,
1175 acpi_video_device_write_brightness(struct file
*file
,
1176 const char __user
* buffer
,
1177 size_t count
, loff_t
* data
)
1179 struct seq_file
*m
= file
->private_data
;
1180 struct acpi_video_device
*dev
= m
->private;
1181 char str
[5] = { 0 };
1182 unsigned int level
= 0;
1186 if (!dev
|| !dev
->brightness
|| count
+ 1 > sizeof str
)
1189 if (copy_from_user(str
, buffer
, count
))
1193 level
= simple_strtoul(str
, NULL
, 0);
1198 /* validate through the list of available levels */
1199 for (i
= 2; i
< dev
->brightness
->count
; i
++)
1200 if (level
== dev
->brightness
->levels
[i
]) {
1201 if (!acpi_video_device_lcd_set_level(dev
, level
))
1209 static int acpi_video_device_EDID_seq_show(struct seq_file
*seq
, void *offset
)
1211 struct acpi_video_device
*dev
= seq
->private;
1214 union acpi_object
*edid
= NULL
;
1220 status
= acpi_video_device_EDID(dev
, &edid
, 128);
1221 if (ACPI_FAILURE(status
)) {
1222 status
= acpi_video_device_EDID(dev
, &edid
, 256);
1225 if (ACPI_FAILURE(status
)) {
1229 if (edid
&& edid
->type
== ACPI_TYPE_BUFFER
) {
1230 for (i
= 0; i
< edid
->buffer
.length
; i
++)
1231 seq_putc(seq
, edid
->buffer
.pointer
[i
]);
1236 seq_printf(seq
, "<not supported>\n");
1244 acpi_video_device_EDID_open_fs(struct inode
*inode
, struct file
*file
)
1246 return single_open(file
, acpi_video_device_EDID_seq_show
,
1250 static int acpi_video_device_add_fs(struct acpi_device
*device
)
1252 struct proc_dir_entry
*entry
, *device_dir
;
1253 struct acpi_video_device
*vid_dev
;
1255 vid_dev
= acpi_driver_data(device
);
1259 device_dir
= proc_mkdir(acpi_device_bid(device
),
1260 vid_dev
->video
->dir
);
1265 entry
= proc_create_data("info", S_IRUGO
, device_dir
,
1266 &acpi_video_device_info_fops
, acpi_driver_data(device
));
1268 goto err_remove_dir
;
1271 entry
= proc_create_data("state", S_IFREG
| S_IRUGO
| S_IWUSR
,
1273 &acpi_video_device_state_fops
,
1274 acpi_driver_data(device
));
1276 goto err_remove_info
;
1278 /* 'brightness' [R/W] */
1279 entry
= proc_create_data("brightness", S_IFREG
| S_IRUGO
| S_IWUSR
,
1281 &acpi_video_device_brightness_fops
,
1282 acpi_driver_data(device
));
1284 goto err_remove_state
;
1287 entry
= proc_create_data("EDID", S_IRUGO
, device_dir
,
1288 &acpi_video_device_EDID_fops
,
1289 acpi_driver_data(device
));
1291 goto err_remove_brightness
;
1293 acpi_device_dir(device
) = device_dir
;
1297 err_remove_brightness
:
1298 remove_proc_entry("brightness", device_dir
);
1300 remove_proc_entry("state", device_dir
);
1302 remove_proc_entry("info", device_dir
);
1304 remove_proc_entry(acpi_device_bid(device
), vid_dev
->video
->dir
);
1308 static int acpi_video_device_remove_fs(struct acpi_device
*device
)
1310 struct acpi_video_device
*vid_dev
;
1311 struct proc_dir_entry
*device_dir
;
1313 vid_dev
= acpi_driver_data(device
);
1314 if (!vid_dev
|| !vid_dev
->video
|| !vid_dev
->video
->dir
)
1317 device_dir
= acpi_device_dir(device
);
1319 remove_proc_entry("info", device_dir
);
1320 remove_proc_entry("state", device_dir
);
1321 remove_proc_entry("brightness", device_dir
);
1322 remove_proc_entry("EDID", device_dir
);
1323 remove_proc_entry(acpi_device_bid(device
), vid_dev
->video
->dir
);
1324 acpi_device_dir(device
) = NULL
;
1331 static int acpi_video_bus_info_seq_show(struct seq_file
*seq
, void *offset
)
1333 struct acpi_video_bus
*video
= seq
->private;
1339 seq_printf(seq
, "Switching heads: %s\n",
1340 video
->flags
.multihead
? "yes" : "no");
1341 seq_printf(seq
, "Video ROM: %s\n",
1342 video
->flags
.rom
? "yes" : "no");
1343 seq_printf(seq
, "Device to be POSTed on boot: %s\n",
1344 video
->flags
.post
? "yes" : "no");
1350 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
)
1352 return single_open(file
, acpi_video_bus_info_seq_show
,
1356 static int acpi_video_bus_ROM_seq_show(struct seq_file
*seq
, void *offset
)
1358 struct acpi_video_bus
*video
= seq
->private;
1364 printk(KERN_INFO PREFIX
"Please implement %s\n", __func__
);
1365 seq_printf(seq
, "<TODO>\n");
1371 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
)
1373 return single_open(file
, acpi_video_bus_ROM_seq_show
, PDE(inode
)->data
);
1376 static int acpi_video_bus_POST_info_seq_show(struct seq_file
*seq
, void *offset
)
1378 struct acpi_video_bus
*video
= seq
->private;
1379 unsigned long long options
;
1386 status
= acpi_video_bus_POST_options(video
, &options
);
1387 if (ACPI_SUCCESS(status
)) {
1388 if (!(options
& 1)) {
1389 printk(KERN_WARNING PREFIX
1390 "The motherboard VGA device is not listed as a possible POST device.\n");
1391 printk(KERN_WARNING PREFIX
1392 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1394 printk(KERN_WARNING
"%llx\n", options
);
1395 seq_printf(seq
, "can POST: <integrated video>");
1397 seq_printf(seq
, " <PCI video>");
1399 seq_printf(seq
, " <AGP video>");
1400 seq_putc(seq
, '\n');
1402 seq_printf(seq
, "<not supported>\n");
1408 acpi_video_bus_POST_info_open_fs(struct inode
*inode
, struct file
*file
)
1410 return single_open(file
, acpi_video_bus_POST_info_seq_show
,
1414 static int acpi_video_bus_POST_seq_show(struct seq_file
*seq
, void *offset
)
1416 struct acpi_video_bus
*video
= seq
->private;
1418 unsigned long long id
;
1424 status
= acpi_video_bus_get_POST(video
, &id
);
1425 if (!ACPI_SUCCESS(status
)) {
1426 seq_printf(seq
, "<not supported>\n");
1429 seq_printf(seq
, "device POSTed is <%s>\n", device_decode
[id
& 3]);
1435 static int acpi_video_bus_DOS_seq_show(struct seq_file
*seq
, void *offset
)
1437 struct acpi_video_bus
*video
= seq
->private;
1440 seq_printf(seq
, "DOS setting: <%d>\n", video
->dos_setting
);
1445 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
)
1447 return single_open(file
, acpi_video_bus_POST_seq_show
,
1451 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
)
1453 return single_open(file
, acpi_video_bus_DOS_seq_show
, PDE(inode
)->data
);
1457 acpi_video_bus_write_POST(struct file
*file
,
1458 const char __user
* buffer
,
1459 size_t count
, loff_t
* data
)
1462 struct seq_file
*m
= file
->private_data
;
1463 struct acpi_video_bus
*video
= m
->private;
1464 char str
[12] = { 0 };
1465 unsigned long long opt
, options
;
1468 if (!video
|| count
+ 1 > sizeof str
)
1471 status
= acpi_video_bus_POST_options(video
, &options
);
1472 if (!ACPI_SUCCESS(status
))
1475 if (copy_from_user(str
, buffer
, count
))
1479 opt
= strtoul(str
, NULL
, 0);
1483 /* just in case an OEM 'forgot' the motherboard... */
1486 if (options
& (1ul << opt
)) {
1487 status
= acpi_video_bus_set_POST(video
, opt
);
1488 if (!ACPI_SUCCESS(status
))
1497 acpi_video_bus_write_DOS(struct file
*file
,
1498 const char __user
* buffer
,
1499 size_t count
, loff_t
* data
)
1502 struct seq_file
*m
= file
->private_data
;
1503 struct acpi_video_bus
*video
= m
->private;
1504 char str
[12] = { 0 };
1508 if (!video
|| count
+ 1 > sizeof str
)
1511 if (copy_from_user(str
, buffer
, count
))
1515 opt
= strtoul(str
, NULL
, 0);
1519 status
= acpi_video_bus_DOS(video
, opt
& 0x3, (opt
& 0x4) >> 2);
1521 if (!ACPI_SUCCESS(status
))
1527 static int acpi_video_bus_add_fs(struct acpi_device
*device
)
1529 struct acpi_video_bus
*video
= acpi_driver_data(device
);
1530 struct proc_dir_entry
*device_dir
;
1531 struct proc_dir_entry
*entry
;
1533 device_dir
= proc_mkdir(acpi_device_bid(device
), acpi_video_dir
);
1538 entry
= proc_create_data("info", S_IRUGO
, device_dir
,
1539 &acpi_video_bus_info_fops
,
1540 acpi_driver_data(device
));
1542 goto err_remove_dir
;
1545 entry
= proc_create_data("ROM", S_IRUGO
, device_dir
,
1546 &acpi_video_bus_ROM_fops
,
1547 acpi_driver_data(device
));
1549 goto err_remove_info
;
1551 /* 'POST_info' [R] */
1552 entry
= proc_create_data("POST_info", S_IRUGO
, device_dir
,
1553 &acpi_video_bus_POST_info_fops
,
1554 acpi_driver_data(device
));
1556 goto err_remove_rom
;
1559 entry
= proc_create_data("POST", S_IFREG
| S_IRUGO
| S_IWUSR
,
1561 &acpi_video_bus_POST_fops
,
1562 acpi_driver_data(device
));
1564 goto err_remove_post_info
;
1567 entry
= proc_create_data("DOS", S_IFREG
| S_IRUGO
| S_IWUSR
,
1569 &acpi_video_bus_DOS_fops
,
1570 acpi_driver_data(device
));
1572 goto err_remove_post
;
1574 video
->dir
= acpi_device_dir(device
) = device_dir
;
1578 remove_proc_entry("POST", device_dir
);
1579 err_remove_post_info
:
1580 remove_proc_entry("POST_info", device_dir
);
1582 remove_proc_entry("ROM", device_dir
);
1584 remove_proc_entry("info", device_dir
);
1586 remove_proc_entry(acpi_device_bid(device
), acpi_video_dir
);
1590 static int acpi_video_bus_remove_fs(struct acpi_device
*device
)
1592 struct proc_dir_entry
*device_dir
= acpi_device_dir(device
);
1595 remove_proc_entry("info", device_dir
);
1596 remove_proc_entry("ROM", device_dir
);
1597 remove_proc_entry("POST_info", device_dir
);
1598 remove_proc_entry("POST", device_dir
);
1599 remove_proc_entry("DOS", device_dir
);
1600 remove_proc_entry(acpi_device_bid(device
), acpi_video_dir
);
1601 acpi_device_dir(device
) = NULL
;
1607 /* --------------------------------------------------------------------------
1609 -------------------------------------------------------------------------- */
1611 /* device interface */
1612 static struct acpi_video_device_attrib
*
1613 acpi_video_get_device_attr(struct acpi_video_bus
*video
, unsigned long device_id
)
1615 struct acpi_video_enumerated_device
*ids
;
1618 for (i
= 0; i
< video
->attached_count
; i
++) {
1619 ids
= &video
->attached_array
[i
];
1620 if ((ids
->value
.int_val
& 0xffff) == device_id
)
1621 return &ids
->value
.attrib
;
1628 acpi_video_bus_get_one_device(struct acpi_device
*device
,
1629 struct acpi_video_bus
*video
)
1631 unsigned long long device_id
;
1633 struct acpi_video_device
*data
;
1634 struct acpi_video_device_attrib
* attribute
;
1636 if (!device
|| !video
)
1640 acpi_evaluate_integer(device
->handle
, "_ADR", NULL
, &device_id
);
1641 if (ACPI_SUCCESS(status
)) {
1643 data
= kzalloc(sizeof(struct acpi_video_device
), GFP_KERNEL
);
1647 strcpy(acpi_device_name(device
), ACPI_VIDEO_DEVICE_NAME
);
1648 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
1649 device
->driver_data
= data
;
1651 data
->device_id
= device_id
;
1652 data
->video
= video
;
1655 attribute
= acpi_video_get_device_attr(video
, device_id
);
1657 if((attribute
!= NULL
) && attribute
->device_id_scheme
) {
1658 switch (attribute
->display_type
) {
1659 case ACPI_VIDEO_DISPLAY_CRT
:
1660 data
->flags
.crt
= 1;
1662 case ACPI_VIDEO_DISPLAY_TV
:
1663 data
->flags
.tvout
= 1;
1665 case ACPI_VIDEO_DISPLAY_DVI
:
1666 data
->flags
.dvi
= 1;
1668 case ACPI_VIDEO_DISPLAY_LCD
:
1669 data
->flags
.lcd
= 1;
1672 data
->flags
.unknown
= 1;
1675 if(attribute
->bios_can_detect
)
1676 data
->flags
.bios
= 1;
1678 data
->flags
.unknown
= 1;
1680 acpi_video_device_bind(video
, data
);
1681 acpi_video_device_find_cap(data
);
1683 status
= acpi_install_notify_handler(device
->handle
,
1685 acpi_video_device_notify
,
1687 if (ACPI_FAILURE(status
)) {
1688 printk(KERN_ERR PREFIX
1689 "Error installing notify handler\n");
1690 if(data
->brightness
)
1691 kfree(data
->brightness
->levels
);
1692 kfree(data
->brightness
);
1697 mutex_lock(&video
->device_list_lock
);
1698 list_add_tail(&data
->entry
, &video
->video_device_list
);
1699 mutex_unlock(&video
->device_list_lock
);
1701 acpi_video_device_add_fs(device
);
1711 * video : video bus device
1716 * Enumerate the video device list of the video bus,
1717 * bind the ids with the corresponding video devices
1718 * under the video bus.
1721 static void acpi_video_device_rebind(struct acpi_video_bus
*video
)
1723 struct acpi_video_device
*dev
;
1725 mutex_lock(&video
->device_list_lock
);
1727 list_for_each_entry(dev
, &video
->video_device_list
, entry
)
1728 acpi_video_device_bind(video
, dev
);
1730 mutex_unlock(&video
->device_list_lock
);
1735 * video : video bus device
1736 * device : video output device under the video
1742 * Bind the ids with the corresponding video devices
1743 * under the video bus.
1747 acpi_video_device_bind(struct acpi_video_bus
*video
,
1748 struct acpi_video_device
*device
)
1750 struct acpi_video_enumerated_device
*ids
;
1753 for (i
= 0; i
< video
->attached_count
; i
++) {
1754 ids
= &video
->attached_array
[i
];
1755 if (device
->device_id
== (ids
->value
.int_val
& 0xffff)) {
1756 ids
->bind_info
= device
;
1757 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "device_bind %d\n", i
));
1764 * video : video bus device
1769 * Call _DOD to enumerate all devices attached to display adapter
1773 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
)
1778 struct acpi_video_enumerated_device
*active_list
;
1779 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
1780 union acpi_object
*dod
= NULL
;
1781 union acpi_object
*obj
;
1783 status
= acpi_evaluate_object(video
->device
->handle
, "_DOD", NULL
, &buffer
);
1784 if (!ACPI_SUCCESS(status
)) {
1785 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _DOD"));
1789 dod
= buffer
.pointer
;
1790 if (!dod
|| (dod
->type
!= ACPI_TYPE_PACKAGE
)) {
1791 ACPI_EXCEPTION((AE_INFO
, status
, "Invalid _DOD data"));
1796 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Found %d video heads in _DOD\n",
1797 dod
->package
.count
));
1799 active_list
= kcalloc(1 + dod
->package
.count
,
1800 sizeof(struct acpi_video_enumerated_device
),
1808 for (i
= 0; i
< dod
->package
.count
; i
++) {
1809 obj
= &dod
->package
.elements
[i
];
1811 if (obj
->type
!= ACPI_TYPE_INTEGER
) {
1812 printk(KERN_ERR PREFIX
1813 "Invalid _DOD data in element %d\n", i
);
1817 active_list
[count
].value
.int_val
= obj
->integer
.value
;
1818 active_list
[count
].bind_info
= NULL
;
1819 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "dod element[%d] = %d\n", i
,
1820 (int)obj
->integer
.value
));
1824 kfree(video
->attached_array
);
1826 video
->attached_array
= active_list
;
1827 video
->attached_count
= count
;
1830 kfree(buffer
.pointer
);
1835 acpi_video_get_next_level(struct acpi_video_device
*device
,
1836 u32 level_current
, u32 event
)
1838 int min
, max
, min_above
, max_below
, i
, l
, delta
= 255;
1839 max
= max_below
= 0;
1840 min
= min_above
= 255;
1841 /* Find closest level to level_current */
1842 for (i
= 2; i
< device
->brightness
->count
; i
++) {
1843 l
= device
->brightness
->levels
[i
];
1844 if (abs(l
- level_current
) < abs(delta
)) {
1845 delta
= l
- level_current
;
1850 /* Ajust level_current to closest available level */
1851 level_current
+= delta
;
1852 for (i
= 2; i
< device
->brightness
->count
; i
++) {
1853 l
= device
->brightness
->levels
[i
];
1858 if (l
< min_above
&& l
> level_current
)
1860 if (l
> max_below
&& l
< level_current
)
1865 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
:
1866 return (level_current
< max
) ? min_above
: min
;
1867 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
:
1868 return (level_current
< max
) ? min_above
: max
;
1869 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
:
1870 return (level_current
> min
) ? max_below
: min
;
1871 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
:
1872 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
:
1875 return level_current
;
1880 acpi_video_switch_brightness(struct acpi_video_device
*device
, int event
)
1882 unsigned long long level_current
, level_next
;
1883 int result
= -EINVAL
;
1885 if (!device
->brightness
)
1888 result
= acpi_video_device_lcd_get_level_current(device
,
1893 level_next
= acpi_video_get_next_level(device
, level_current
, event
);
1895 result
= acpi_video_device_lcd_set_level(device
, level_next
);
1899 printk(KERN_ERR PREFIX
"Failed to switch the brightness\n");
1905 acpi_video_bus_get_devices(struct acpi_video_bus
*video
,
1906 struct acpi_device
*device
)
1909 struct acpi_device
*dev
;
1911 acpi_video_device_enumerate(video
);
1913 list_for_each_entry(dev
, &device
->children
, node
) {
1915 status
= acpi_video_bus_get_one_device(dev
, video
);
1916 if (ACPI_FAILURE(status
)) {
1917 printk(KERN_WARNING PREFIX
1918 "Cant attach device");
1925 static int acpi_video_bus_put_one_device(struct acpi_video_device
*device
)
1928 struct acpi_video_bus
*video
;
1931 if (!device
|| !device
->video
)
1934 video
= device
->video
;
1936 acpi_video_device_remove_fs(device
->dev
);
1938 status
= acpi_remove_notify_handler(device
->dev
->handle
,
1940 acpi_video_device_notify
);
1941 backlight_device_unregister(device
->backlight
);
1943 sysfs_remove_link(&device
->dev
->dev
.kobj
,
1945 sysfs_remove_link(&device
->cdev
->device
.kobj
,
1947 thermal_cooling_device_unregister(device
->cdev
);
1948 device
->cdev
= NULL
;
1950 video_output_unregister(device
->output_dev
);
1955 static int acpi_video_bus_put_devices(struct acpi_video_bus
*video
)
1958 struct acpi_video_device
*dev
, *next
;
1960 mutex_lock(&video
->device_list_lock
);
1962 list_for_each_entry_safe(dev
, next
, &video
->video_device_list
, entry
) {
1964 status
= acpi_video_bus_put_one_device(dev
);
1965 if (ACPI_FAILURE(status
))
1966 printk(KERN_WARNING PREFIX
1967 "hhuuhhuu bug in acpi video driver.\n");
1969 if (dev
->brightness
) {
1970 kfree(dev
->brightness
->levels
);
1971 kfree(dev
->brightness
);
1973 list_del(&dev
->entry
);
1977 mutex_unlock(&video
->device_list_lock
);
1982 /* acpi_video interface */
1984 static int acpi_video_bus_start_devices(struct acpi_video_bus
*video
)
1986 return acpi_video_bus_DOS(video
, 0, 0);
1989 static int acpi_video_bus_stop_devices(struct acpi_video_bus
*video
)
1991 return acpi_video_bus_DOS(video
, 0, 1);
1994 static void acpi_video_bus_notify(struct acpi_device
*device
, u32 event
)
1996 struct acpi_video_bus
*video
= acpi_driver_data(device
);
1997 struct input_dev
*input
;
2003 input
= video
->input
;
2006 case ACPI_VIDEO_NOTIFY_SWITCH
: /* User requested a switch,
2007 * most likely via hotkey. */
2008 acpi_bus_generate_proc_event(device
, event
, 0);
2009 keycode
= KEY_SWITCHVIDEOMODE
;
2012 case ACPI_VIDEO_NOTIFY_PROBE
: /* User plugged in or removed a video
2014 acpi_video_device_enumerate(video
);
2015 acpi_video_device_rebind(video
);
2016 acpi_bus_generate_proc_event(device
, event
, 0);
2017 keycode
= KEY_SWITCHVIDEOMODE
;
2020 case ACPI_VIDEO_NOTIFY_CYCLE
: /* Cycle Display output hotkey pressed. */
2021 acpi_bus_generate_proc_event(device
, event
, 0);
2022 keycode
= KEY_SWITCHVIDEOMODE
;
2024 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
: /* Next Display output hotkey pressed. */
2025 acpi_bus_generate_proc_event(device
, event
, 0);
2026 keycode
= KEY_VIDEO_NEXT
;
2028 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT
: /* previous Display output hotkey pressed. */
2029 acpi_bus_generate_proc_event(device
, event
, 0);
2030 keycode
= KEY_VIDEO_PREV
;
2034 keycode
= KEY_UNKNOWN
;
2035 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
2036 "Unsupported event [0x%x]\n", event
));
2040 acpi_notifier_call_chain(device
, event
, 0);
2041 input_report_key(input
, keycode
, 1);
2043 input_report_key(input
, keycode
, 0);
2049 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
)
2051 struct acpi_video_device
*video_device
= data
;
2052 struct acpi_device
*device
= NULL
;
2053 struct acpi_video_bus
*bus
;
2054 struct input_dev
*input
;
2060 device
= video_device
->dev
;
2061 bus
= video_device
->video
;
2065 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
: /* Cycle brightness */
2066 if (brightness_switch_enabled
)
2067 acpi_video_switch_brightness(video_device
, event
);
2068 acpi_bus_generate_proc_event(device
, event
, 0);
2069 keycode
= KEY_BRIGHTNESS_CYCLE
;
2071 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
: /* Increase brightness */
2072 if (brightness_switch_enabled
)
2073 acpi_video_switch_brightness(video_device
, event
);
2074 acpi_bus_generate_proc_event(device
, event
, 0);
2075 keycode
= KEY_BRIGHTNESSUP
;
2077 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
: /* Decrease brightness */
2078 if (brightness_switch_enabled
)
2079 acpi_video_switch_brightness(video_device
, event
);
2080 acpi_bus_generate_proc_event(device
, event
, 0);
2081 keycode
= KEY_BRIGHTNESSDOWN
;
2083 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
: /* zero brightnesss */
2084 if (brightness_switch_enabled
)
2085 acpi_video_switch_brightness(video_device
, event
);
2086 acpi_bus_generate_proc_event(device
, event
, 0);
2087 keycode
= KEY_BRIGHTNESS_ZERO
;
2089 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
: /* display device off */
2090 if (brightness_switch_enabled
)
2091 acpi_video_switch_brightness(video_device
, event
);
2092 acpi_bus_generate_proc_event(device
, event
, 0);
2093 keycode
= KEY_DISPLAY_OFF
;
2096 keycode
= KEY_UNKNOWN
;
2097 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
2098 "Unsupported event [0x%x]\n", event
));
2102 acpi_notifier_call_chain(device
, event
, 0);
2103 input_report_key(input
, keycode
, 1);
2105 input_report_key(input
, keycode
, 0);
2111 static int instance
;
2112 static int acpi_video_resume(struct acpi_device
*device
)
2114 struct acpi_video_bus
*video
;
2115 struct acpi_video_device
*video_device
;
2118 if (!device
|| !acpi_driver_data(device
))
2121 video
= acpi_driver_data(device
);
2123 for (i
= 0; i
< video
->attached_count
; i
++) {
2124 video_device
= video
->attached_array
[i
].bind_info
;
2125 if (video_device
&& video_device
->backlight
)
2126 acpi_video_set_brightness(video_device
->backlight
);
2131 static int acpi_video_bus_add(struct acpi_device
*device
)
2133 struct acpi_video_bus
*video
;
2134 struct input_dev
*input
;
2137 video
= kzalloc(sizeof(struct acpi_video_bus
), GFP_KERNEL
);
2141 /* a hack to fix the duplicate name "VID" problem on T61 */
2142 if (!strcmp(device
->pnp
.bus_id
, "VID")) {
2144 device
->pnp
.bus_id
[3] = '0' + instance
;
2147 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2148 if (!strcmp(device
->pnp
.bus_id
, "VGA")) {
2150 device
->pnp
.bus_id
[3] = '0' + instance
;
2154 video
->device
= device
;
2155 strcpy(acpi_device_name(device
), ACPI_VIDEO_BUS_NAME
);
2156 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
2157 device
->driver_data
= video
;
2159 acpi_video_bus_find_cap(video
);
2160 error
= acpi_video_bus_check(video
);
2162 goto err_free_video
;
2164 error
= acpi_video_bus_add_fs(device
);
2166 goto err_free_video
;
2168 mutex_init(&video
->device_list_lock
);
2169 INIT_LIST_HEAD(&video
->video_device_list
);
2171 acpi_video_bus_get_devices(video
, device
);
2172 acpi_video_bus_start_devices(video
);
2174 video
->input
= input
= input_allocate_device();
2177 goto err_stop_video
;
2180 snprintf(video
->phys
, sizeof(video
->phys
),
2181 "%s/video/input0", acpi_device_hid(video
->device
));
2183 input
->name
= acpi_device_name(video
->device
);
2184 input
->phys
= video
->phys
;
2185 input
->id
.bustype
= BUS_HOST
;
2186 input
->id
.product
= 0x06;
2187 input
->dev
.parent
= &device
->dev
;
2188 input
->evbit
[0] = BIT(EV_KEY
);
2189 set_bit(KEY_SWITCHVIDEOMODE
, input
->keybit
);
2190 set_bit(KEY_VIDEO_NEXT
, input
->keybit
);
2191 set_bit(KEY_VIDEO_PREV
, input
->keybit
);
2192 set_bit(KEY_BRIGHTNESS_CYCLE
, input
->keybit
);
2193 set_bit(KEY_BRIGHTNESSUP
, input
->keybit
);
2194 set_bit(KEY_BRIGHTNESSDOWN
, input
->keybit
);
2195 set_bit(KEY_BRIGHTNESS_ZERO
, input
->keybit
);
2196 set_bit(KEY_DISPLAY_OFF
, input
->keybit
);
2197 set_bit(KEY_UNKNOWN
, input
->keybit
);
2199 error
= input_register_device(input
);
2201 goto err_free_input_dev
;
2203 printk(KERN_INFO PREFIX
"%s [%s] (multi-head: %s rom: %s post: %s)\n",
2204 ACPI_VIDEO_DEVICE_NAME
, acpi_device_bid(device
),
2205 video
->flags
.multihead
? "yes" : "no",
2206 video
->flags
.rom
? "yes" : "no",
2207 video
->flags
.post
? "yes" : "no");
2212 input_free_device(input
);
2214 acpi_video_bus_stop_devices(video
);
2215 acpi_video_bus_put_devices(video
);
2216 kfree(video
->attached_array
);
2217 acpi_video_bus_remove_fs(device
);
2220 device
->driver_data
= NULL
;
2225 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
)
2227 struct acpi_video_bus
*video
= NULL
;
2230 if (!device
|| !acpi_driver_data(device
))
2233 video
= acpi_driver_data(device
);
2235 acpi_video_bus_stop_devices(video
);
2236 acpi_video_bus_put_devices(video
);
2237 acpi_video_bus_remove_fs(device
);
2239 input_unregister_device(video
->input
);
2240 kfree(video
->attached_array
);
2246 static int __init
intel_opregion_present(void)
2248 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2249 struct pci_dev
*dev
= NULL
;
2252 for_each_pci_dev(dev
) {
2253 if ((dev
->class >> 8) != PCI_CLASS_DISPLAY_VGA
)
2255 if (dev
->vendor
!= PCI_VENDOR_ID_INTEL
)
2257 pci_read_config_dword(dev
, 0xfc, &address
);
2266 int acpi_video_register(void)
2270 acpi_video_dir
= proc_mkdir(ACPI_VIDEO_CLASS
, acpi_root_dir
);
2271 if (!acpi_video_dir
)
2274 result
= acpi_bus_register_driver(&acpi_video_bus
);
2276 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
2282 EXPORT_SYMBOL(acpi_video_register
);
2285 * This is kind of nasty. Hardware using Intel chipsets may require
2286 * the video opregion code to be run first in order to initialise
2287 * state before any ACPI video calls are made. To handle this we defer
2288 * registration of the video class until the opregion code has run.
2291 static int __init
acpi_video_init(void)
2293 if (intel_opregion_present())
2296 return acpi_video_register();
2299 void __exit
acpi_video_exit(void)
2302 acpi_bus_unregister_driver(&acpi_video_bus
);
2304 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
2308 EXPORT_SYMBOL(acpi_video_exit
);
2310 module_init(acpi_video_init
);
2311 module_exit(acpi_video_exit
);