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/proc_fs.h>
33 #include <linux/seq_file.h>
35 #include <linux/backlight.h>
36 #include <asm/uaccess.h>
38 #include <acpi/acpi_bus.h>
39 #include <acpi/acpi_drivers.h>
41 #define ACPI_VIDEO_COMPONENT 0x08000000
42 #define ACPI_VIDEO_CLASS "video"
43 #define ACPI_VIDEO_BUS_NAME "Video Bus"
44 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
45 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
46 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
47 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
48 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
49 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
51 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
52 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
53 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
54 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
55 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
57 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
58 #define ACPI_VIDEO_HEAD_END (~0u)
59 #define MAX_NAME_LEN 20
61 #define ACPI_VIDEO_DISPLAY_CRT 1
62 #define ACPI_VIDEO_DISPLAY_TV 2
63 #define ACPI_VIDEO_DISPLAY_DVI 3
64 #define ACPI_VIDEO_DISPLAY_LCD 4
66 #define _COMPONENT ACPI_VIDEO_COMPONENT
67 ACPI_MODULE_NAME("video");
69 MODULE_AUTHOR("Bruno Ducrot");
70 MODULE_DESCRIPTION("ACPI Video Driver");
71 MODULE_LICENSE("GPL");
73 static int acpi_video_bus_add(struct acpi_device
*device
);
74 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
);
76 static struct acpi_driver acpi_video_bus
= {
78 .class = ACPI_VIDEO_CLASS
,
79 .ids
= ACPI_VIDEO_HID
,
81 .add
= acpi_video_bus_add
,
82 .remove
= acpi_video_bus_remove
,
86 struct acpi_video_bus_flags
{
87 u8 multihead
:1; /* can switch video heads */
88 u8 rom
:1; /* can retrieve a video rom */
89 u8 post
:1; /* can configure the head to */
93 struct acpi_video_bus_cap
{
94 u8 _DOS
:1; /*Enable/Disable output switching */
95 u8 _DOD
:1; /*Enumerate all devices attached to display adapter */
96 u8 _ROM
:1; /*Get ROM Data */
97 u8 _GPD
:1; /*Get POST Device */
98 u8 _SPD
:1; /*Set POST Device */
99 u8 _VPO
:1; /*Video POST Options */
103 struct acpi_video_device_attrib
{
104 u32 display_index
:4; /* A zero-based instance of the Display */
105 u32 display_port_attachment
:4; /*This field differenates displays type */
106 u32 display_type
:4; /*Describe the specific type in use */
107 u32 vendor_specific
:4; /*Chipset Vendor Specifi */
108 u32 bios_can_detect
:1; /*BIOS can detect the device */
109 u32 depend_on_vga
:1; /*Non-VGA output device whose power is related to
111 u32 pipe_id
:3; /*For VGA multiple-head devices. */
112 u32 reserved
:10; /*Must be 0 */
113 u32 device_id_scheme
:1; /*Device ID Scheme */
116 struct acpi_video_enumerated_device
{
119 struct acpi_video_device_attrib attrib
;
121 struct acpi_video_device
*bind_info
;
124 struct acpi_video_bus
{
125 struct acpi_device
*device
;
127 struct acpi_video_enumerated_device
*attached_array
;
129 struct acpi_video_bus_cap cap
;
130 struct acpi_video_bus_flags flags
;
131 struct semaphore sem
;
132 struct list_head video_device_list
;
133 struct proc_dir_entry
*dir
;
136 struct acpi_video_device_flags
{
146 struct acpi_video_device_cap
{
147 u8 _ADR
:1; /*Return the unique ID */
148 u8 _BCL
:1; /*Query list of brightness control levels supported */
149 u8 _BCM
:1; /*Set the brightness level */
150 u8 _BQC
:1; /* Get current brightness level */
151 u8 _DDC
:1; /*Return the EDID for this device */
152 u8 _DCS
:1; /*Return status of output device */
153 u8 _DGS
:1; /*Query graphics state */
154 u8 _DSS
:1; /*Device state set */
157 struct acpi_video_device_brightness
{
163 struct acpi_video_device
{
164 unsigned long device_id
;
165 struct acpi_video_device_flags flags
;
166 struct acpi_video_device_cap cap
;
167 struct list_head entry
;
168 struct acpi_video_bus
*video
;
169 struct acpi_device
*dev
;
170 struct acpi_video_device_brightness
*brightness
;
171 struct backlight_device
*backlight
;
172 struct backlight_properties
*data
;
176 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
);
177 static struct file_operations acpi_video_bus_info_fops
= {
178 .open
= acpi_video_bus_info_open_fs
,
181 .release
= single_release
,
184 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
);
185 static struct file_operations acpi_video_bus_ROM_fops
= {
186 .open
= acpi_video_bus_ROM_open_fs
,
189 .release
= single_release
,
192 static int acpi_video_bus_POST_info_open_fs(struct inode
*inode
,
194 static struct file_operations acpi_video_bus_POST_info_fops
= {
195 .open
= acpi_video_bus_POST_info_open_fs
,
198 .release
= single_release
,
201 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
);
202 static struct file_operations acpi_video_bus_POST_fops
= {
203 .open
= acpi_video_bus_POST_open_fs
,
206 .release
= single_release
,
209 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
);
210 static struct file_operations acpi_video_bus_DOS_fops
= {
211 .open
= acpi_video_bus_DOS_open_fs
,
214 .release
= single_release
,
218 static int acpi_video_device_info_open_fs(struct inode
*inode
,
220 static struct file_operations acpi_video_device_info_fops
= {
221 .open
= acpi_video_device_info_open_fs
,
224 .release
= single_release
,
227 static int acpi_video_device_state_open_fs(struct inode
*inode
,
229 static struct file_operations acpi_video_device_state_fops
= {
230 .open
= acpi_video_device_state_open_fs
,
233 .release
= single_release
,
236 static int acpi_video_device_brightness_open_fs(struct inode
*inode
,
238 static struct file_operations acpi_video_device_brightness_fops
= {
239 .open
= acpi_video_device_brightness_open_fs
,
242 .release
= single_release
,
245 static int acpi_video_device_EDID_open_fs(struct inode
*inode
,
247 static struct file_operations acpi_video_device_EDID_fops
= {
248 .open
= acpi_video_device_EDID_open_fs
,
251 .release
= single_release
,
254 static char device_decode
[][30] = {
255 "motherboard VGA device",
261 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
);
262 static void acpi_video_device_rebind(struct acpi_video_bus
*video
);
263 static void acpi_video_device_bind(struct acpi_video_bus
*video
,
264 struct acpi_video_device
*device
);
265 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
);
266 static int acpi_video_switch_output(struct acpi_video_bus
*video
, int event
);
267 static int acpi_video_device_lcd_set_level(struct acpi_video_device
*device
,
269 static int acpi_video_device_lcd_get_level_current(
270 struct acpi_video_device
*device
,
271 unsigned long *level
);
272 static int acpi_video_get_next_level(struct acpi_video_device
*device
,
273 u32 level_current
, u32 event
);
274 static void acpi_video_switch_brightness(struct acpi_video_device
*device
,
277 /*backlight device sysfs support*/
278 static int acpi_video_get_brightness(struct backlight_device
*bd
)
280 unsigned long cur_level
;
281 struct acpi_video_device
*vd
=
282 (struct acpi_video_device
*)class_get_devdata(&bd
->class_dev
);
283 acpi_video_device_lcd_get_level_current(vd
, &cur_level
);
284 return (int) cur_level
;
287 static int acpi_video_set_brightness(struct backlight_device
*bd
)
289 int request_level
= bd
->props
->brightness
;
290 struct acpi_video_device
*vd
=
291 (struct acpi_video_device
*)class_get_devdata(&bd
->class_dev
);
292 acpi_video_device_lcd_set_level(vd
, request_level
);
296 /* --------------------------------------------------------------------------
298 -------------------------------------------------------------------------- */
303 acpi_video_device_query(struct acpi_video_device
*device
, unsigned long *state
)
307 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DGS", NULL
, state
);
313 acpi_video_device_get_state(struct acpi_video_device
*device
,
314 unsigned long *state
)
318 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DCS", NULL
, state
);
324 acpi_video_device_set_state(struct acpi_video_device
*device
, int state
)
327 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
328 struct acpi_object_list args
= { 1, &arg0
};
332 arg0
.integer
.value
= state
;
333 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DSS", &args
, &ret
);
339 acpi_video_device_lcd_query_levels(struct acpi_video_device
*device
,
340 union acpi_object
**levels
)
343 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
344 union acpi_object
*obj
;
349 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCL", NULL
, &buffer
);
350 if (!ACPI_SUCCESS(status
))
352 obj
= (union acpi_object
*)buffer
.pointer
;
353 if (!obj
|| (obj
->type
!= ACPI_TYPE_PACKAGE
)) {
354 printk(KERN_ERR PREFIX
"Invalid _BCL data\n");
364 kfree(buffer
.pointer
);
370 acpi_video_device_lcd_set_level(struct acpi_video_device
*device
, int level
)
373 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
374 struct acpi_object_list args
= { 1, &arg0
};
377 arg0
.integer
.value
= level
;
378 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCM", &args
, NULL
);
380 printk(KERN_DEBUG
"set_level status: %x\n", status
);
385 acpi_video_device_lcd_get_level_current(struct acpi_video_device
*device
,
386 unsigned long *level
)
390 status
= acpi_evaluate_integer(device
->dev
->handle
, "_BQC", NULL
, level
);
396 acpi_video_device_EDID(struct acpi_video_device
*device
,
397 union acpi_object
**edid
, ssize_t length
)
400 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
401 union acpi_object
*obj
;
402 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
403 struct acpi_object_list args
= { 1, &arg0
};
411 arg0
.integer
.value
= 1;
412 else if (length
== 256)
413 arg0
.integer
.value
= 2;
417 status
= acpi_evaluate_object(device
->dev
->handle
, "_DDC", &args
, &buffer
);
418 if (ACPI_FAILURE(status
))
421 obj
= buffer
.pointer
;
423 if (obj
&& obj
->type
== ACPI_TYPE_BUFFER
)
426 printk(KERN_ERR PREFIX
"Invalid _DDC data\n");
437 acpi_video_bus_set_POST(struct acpi_video_bus
*video
, unsigned long option
)
441 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
442 struct acpi_object_list args
= { 1, &arg0
};
445 arg0
.integer
.value
= option
;
447 status
= acpi_evaluate_integer(video
->device
->handle
, "_SPD", &args
, &tmp
);
448 if (ACPI_SUCCESS(status
))
449 status
= tmp
? (-EINVAL
) : (AE_OK
);
455 acpi_video_bus_get_POST(struct acpi_video_bus
*video
, unsigned long *id
)
459 status
= acpi_evaluate_integer(video
->device
->handle
, "_GPD", NULL
, id
);
465 acpi_video_bus_POST_options(struct acpi_video_bus
*video
,
466 unsigned long *options
)
470 status
= acpi_evaluate_integer(video
->device
->handle
, "_VPO", NULL
, options
);
478 * video : video bus device pointer
480 * 0. The system BIOS should NOT automatically switch(toggle)
481 * the active display output.
482 * 1. The system BIOS should automatically switch (toggle) the
483 * active display output. No swich event.
484 * 2. The _DGS value should be locked.
485 * 3. The system BIOS should not automatically switch (toggle) the
486 * active display output, but instead generate the display switch
489 * 0. The system BIOS should automatically control the brightness level
490 * of the LCD, when the power changes from AC to DC
491 * 1. The system BIOS should NOT automatically control the brightness
492 * level of the LCD, when the power changes from AC to DC.
498 acpi_video_bus_DOS(struct acpi_video_bus
*video
, int bios_flag
, int lcd_flag
)
500 acpi_integer status
= 0;
501 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
502 struct acpi_object_list args
= { 1, &arg0
};
505 if (bios_flag
< 0 || bios_flag
> 3 || lcd_flag
< 0 || lcd_flag
> 1) {
509 arg0
.integer
.value
= (lcd_flag
<< 2) | bios_flag
;
510 video
->dos_setting
= arg0
.integer
.value
;
511 acpi_evaluate_object(video
->device
->handle
, "_DOS", &args
, NULL
);
519 * device : video output device (LCD, CRT, ..)
524 * Find out all required AML method defined under the output
528 static void acpi_video_device_find_cap(struct acpi_video_device
*device
)
531 acpi_handle h_dummy1
;
534 union acpi_object
*obj
= NULL
;
535 struct acpi_video_device_brightness
*br
= NULL
;
538 memset(&device
->cap
, 0, 4);
540 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_ADR", &h_dummy1
))) {
541 device
->cap
._ADR
= 1;
543 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCL", &h_dummy1
))) {
544 device
->cap
._BCL
= 1;
546 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCM", &h_dummy1
))) {
547 device
->cap
._BCM
= 1;
549 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
,"_BQC",&h_dummy1
)))
550 device
->cap
._BQC
= 1;
551 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DDC", &h_dummy1
))) {
552 device
->cap
._DDC
= 1;
554 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DCS", &h_dummy1
))) {
555 device
->cap
._DCS
= 1;
557 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DGS", &h_dummy1
))) {
558 device
->cap
._DGS
= 1;
560 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DSS", &h_dummy1
))) {
561 device
->cap
._DSS
= 1;
564 status
= acpi_video_device_lcd_query_levels(device
, &obj
);
566 if (obj
&& obj
->type
== ACPI_TYPE_PACKAGE
&& obj
->package
.count
>= 2) {
568 union acpi_object
*o
;
570 br
= kzalloc(sizeof(*br
), GFP_KERNEL
);
572 printk(KERN_ERR
"can't allocate memory\n");
574 br
->levels
= kmalloc(obj
->package
.count
*
575 sizeof *(br
->levels
), GFP_KERNEL
);
579 for (i
= 0; i
< obj
->package
.count
; i
++) {
580 o
= (union acpi_object
*)&obj
->package
.
582 if (o
->type
!= ACPI_TYPE_INTEGER
) {
583 printk(KERN_ERR PREFIX
"Invalid data\n");
586 br
->levels
[count
] = (u32
) o
->integer
.value
;
587 if (br
->levels
[count
] > max_level
)
588 max_level
= br
->levels
[count
];
597 device
->brightness
= br
;
598 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
599 "found %d brightness levels\n",
607 if (device
->cap
._BCL
&& device
->cap
._BCM
&& device
->cap
._BQC
){
609 static int count
= 0;
611 struct backlight_properties
*acpi_video_data
;
613 name
= kzalloc(MAX_NAME_LEN
, GFP_KERNEL
);
617 acpi_video_data
= kzalloc(
618 sizeof(struct backlight_properties
),
620 if (!acpi_video_data
){
624 acpi_video_data
->owner
= THIS_MODULE
;
625 acpi_video_data
->get_brightness
=
626 acpi_video_get_brightness
;
627 acpi_video_data
->update_status
=
628 acpi_video_set_brightness
;
629 sprintf(name
, "acpi_video%d", count
++);
630 device
->data
= acpi_video_data
;
631 acpi_video_data
->max_brightness
= max_level
;
632 acpi_video_device_lcd_get_level_current(device
, &tmp
);
633 acpi_video_data
->brightness
= (int)tmp
;
634 device
->backlight
= backlight_device_register(name
,
635 NULL
, device
, acpi_video_data
);
643 * device : video output device (VGA)
648 * Find out all required AML method defined under the video bus device.
651 static void acpi_video_bus_find_cap(struct acpi_video_bus
*video
)
653 acpi_handle h_dummy1
;
655 memset(&video
->cap
, 0, 4);
656 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOS", &h_dummy1
))) {
659 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOD", &h_dummy1
))) {
662 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_ROM", &h_dummy1
))) {
665 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_GPD", &h_dummy1
))) {
668 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_SPD", &h_dummy1
))) {
671 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_VPO", &h_dummy1
))) {
677 * Check whether the video bus device has required AML method to
678 * support the desired features
681 static int acpi_video_bus_check(struct acpi_video_bus
*video
)
683 acpi_status status
= -ENOENT
;
689 /* Since there is no HID, CID and so on for VGA driver, we have
690 * to check well known required nodes.
693 /* Does this device able to support video switching ? */
694 if (video
->cap
._DOS
) {
695 video
->flags
.multihead
= 1;
699 /* Does this device able to retrieve a retrieve a video ROM ? */
700 if (video
->cap
._ROM
) {
701 video
->flags
.rom
= 1;
705 /* Does this device able to configure which video device to POST ? */
706 if (video
->cap
._GPD
&& video
->cap
._SPD
&& video
->cap
._VPO
) {
707 video
->flags
.post
= 1;
714 /* --------------------------------------------------------------------------
716 -------------------------------------------------------------------------- */
718 static struct proc_dir_entry
*acpi_video_dir
;
722 static int acpi_video_device_info_seq_show(struct seq_file
*seq
, void *offset
)
724 struct acpi_video_device
*dev
= seq
->private;
730 seq_printf(seq
, "device_id: 0x%04x\n", (u32
) dev
->device_id
);
731 seq_printf(seq
, "type: ");
733 seq_printf(seq
, "CRT\n");
734 else if (dev
->flags
.lcd
)
735 seq_printf(seq
, "LCD\n");
736 else if (dev
->flags
.tvout
)
737 seq_printf(seq
, "TVOUT\n");
738 else if (dev
->flags
.dvi
)
739 seq_printf(seq
, "DVI\n");
741 seq_printf(seq
, "UNKNOWN\n");
743 seq_printf(seq
, "known by bios: %s\n", dev
->flags
.bios
? "yes" : "no");
750 acpi_video_device_info_open_fs(struct inode
*inode
, struct file
*file
)
752 return single_open(file
, acpi_video_device_info_seq_show
,
756 static int acpi_video_device_state_seq_show(struct seq_file
*seq
, void *offset
)
759 struct acpi_video_device
*dev
= seq
->private;
766 status
= acpi_video_device_get_state(dev
, &state
);
767 seq_printf(seq
, "state: ");
768 if (ACPI_SUCCESS(status
))
769 seq_printf(seq
, "0x%02lx\n", state
);
771 seq_printf(seq
, "<not supported>\n");
773 status
= acpi_video_device_query(dev
, &state
);
774 seq_printf(seq
, "query: ");
775 if (ACPI_SUCCESS(status
))
776 seq_printf(seq
, "0x%02lx\n", state
);
778 seq_printf(seq
, "<not supported>\n");
785 acpi_video_device_state_open_fs(struct inode
*inode
, struct file
*file
)
787 return single_open(file
, acpi_video_device_state_seq_show
,
792 acpi_video_device_write_state(struct file
*file
,
793 const char __user
* buffer
,
794 size_t count
, loff_t
* data
)
797 struct seq_file
*m
= file
->private_data
;
798 struct acpi_video_device
*dev
= m
->private;
799 char str
[12] = { 0 };
803 if (!dev
|| count
+ 1 > sizeof str
)
806 if (copy_from_user(str
, buffer
, count
))
810 state
= simple_strtoul(str
, NULL
, 0);
811 state
&= ((1ul << 31) | (1ul << 30) | (1ul << 0));
813 status
= acpi_video_device_set_state(dev
, state
);
822 acpi_video_device_brightness_seq_show(struct seq_file
*seq
, void *offset
)
824 struct acpi_video_device
*dev
= seq
->private;
828 if (!dev
|| !dev
->brightness
) {
829 seq_printf(seq
, "<not supported>\n");
833 seq_printf(seq
, "levels: ");
834 for (i
= 0; i
< dev
->brightness
->count
; i
++)
835 seq_printf(seq
, " %d", dev
->brightness
->levels
[i
]);
836 seq_printf(seq
, "\ncurrent: %d\n", dev
->brightness
->curr
);
842 acpi_video_device_brightness_open_fs(struct inode
*inode
, struct file
*file
)
844 return single_open(file
, acpi_video_device_brightness_seq_show
,
849 acpi_video_device_write_brightness(struct file
*file
,
850 const char __user
* buffer
,
851 size_t count
, loff_t
* data
)
853 struct seq_file
*m
= file
->private_data
;
854 struct acpi_video_device
*dev
= m
->private;
856 unsigned int level
= 0;
860 if (!dev
|| !dev
->brightness
|| count
+ 1 > sizeof str
)
863 if (copy_from_user(str
, buffer
, count
))
867 level
= simple_strtoul(str
, NULL
, 0);
872 /* validate though the list of available levels */
873 for (i
= 0; i
< dev
->brightness
->count
; i
++)
874 if (level
== dev
->brightness
->levels
[i
]) {
876 (acpi_video_device_lcd_set_level(dev
, level
)))
877 dev
->brightness
->curr
= level
;
884 static int acpi_video_device_EDID_seq_show(struct seq_file
*seq
, void *offset
)
886 struct acpi_video_device
*dev
= seq
->private;
889 union acpi_object
*edid
= NULL
;
895 status
= acpi_video_device_EDID(dev
, &edid
, 128);
896 if (ACPI_FAILURE(status
)) {
897 status
= acpi_video_device_EDID(dev
, &edid
, 256);
900 if (ACPI_FAILURE(status
)) {
904 if (edid
&& edid
->type
== ACPI_TYPE_BUFFER
) {
905 for (i
= 0; i
< edid
->buffer
.length
; i
++)
906 seq_putc(seq
, edid
->buffer
.pointer
[i
]);
911 seq_printf(seq
, "<not supported>\n");
919 acpi_video_device_EDID_open_fs(struct inode
*inode
, struct file
*file
)
921 return single_open(file
, acpi_video_device_EDID_seq_show
,
925 static int acpi_video_device_add_fs(struct acpi_device
*device
)
927 struct proc_dir_entry
*entry
= NULL
;
928 struct acpi_video_device
*vid_dev
;
934 vid_dev
= acpi_driver_data(device
);
938 if (!acpi_device_dir(device
)) {
939 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
),
940 vid_dev
->video
->dir
);
941 if (!acpi_device_dir(device
))
943 acpi_device_dir(device
)->owner
= THIS_MODULE
;
947 entry
= create_proc_entry("info", S_IRUGO
, acpi_device_dir(device
));
951 entry
->proc_fops
= &acpi_video_device_info_fops
;
952 entry
->data
= acpi_driver_data(device
);
953 entry
->owner
= THIS_MODULE
;
958 create_proc_entry("state", S_IFREG
| S_IRUGO
| S_IWUSR
,
959 acpi_device_dir(device
));
963 acpi_video_device_state_fops
.write
= acpi_video_device_write_state
;
964 entry
->proc_fops
= &acpi_video_device_state_fops
;
965 entry
->data
= acpi_driver_data(device
);
966 entry
->owner
= THIS_MODULE
;
969 /* 'brightness' [R/W] */
971 create_proc_entry("brightness", S_IFREG
| S_IRUGO
| S_IWUSR
,
972 acpi_device_dir(device
));
976 acpi_video_device_brightness_fops
.write
= acpi_video_device_write_brightness
;
977 entry
->proc_fops
= &acpi_video_device_brightness_fops
;
978 entry
->data
= acpi_driver_data(device
);
979 entry
->owner
= THIS_MODULE
;
983 entry
= create_proc_entry("EDID", S_IRUGO
, acpi_device_dir(device
));
987 entry
->proc_fops
= &acpi_video_device_EDID_fops
;
988 entry
->data
= acpi_driver_data(device
);
989 entry
->owner
= THIS_MODULE
;
995 static int acpi_video_device_remove_fs(struct acpi_device
*device
)
997 struct acpi_video_device
*vid_dev
;
999 vid_dev
= acpi_driver_data(device
);
1000 if (!vid_dev
|| !vid_dev
->video
|| !vid_dev
->video
->dir
)
1003 if (acpi_device_dir(device
)) {
1004 remove_proc_entry("info", acpi_device_dir(device
));
1005 remove_proc_entry("state", acpi_device_dir(device
));
1006 remove_proc_entry("brightness", acpi_device_dir(device
));
1007 remove_proc_entry("EDID", acpi_device_dir(device
));
1008 remove_proc_entry(acpi_device_bid(device
), vid_dev
->video
->dir
);
1009 acpi_device_dir(device
) = NULL
;
1016 static int acpi_video_bus_info_seq_show(struct seq_file
*seq
, void *offset
)
1018 struct acpi_video_bus
*video
= seq
->private;
1024 seq_printf(seq
, "Switching heads: %s\n",
1025 video
->flags
.multihead
? "yes" : "no");
1026 seq_printf(seq
, "Video ROM: %s\n",
1027 video
->flags
.rom
? "yes" : "no");
1028 seq_printf(seq
, "Device to be POSTed on boot: %s\n",
1029 video
->flags
.post
? "yes" : "no");
1035 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
)
1037 return single_open(file
, acpi_video_bus_info_seq_show
,
1041 static int acpi_video_bus_ROM_seq_show(struct seq_file
*seq
, void *offset
)
1043 struct acpi_video_bus
*video
= seq
->private;
1049 printk(KERN_INFO PREFIX
"Please implement %s\n", __FUNCTION__
);
1050 seq_printf(seq
, "<TODO>\n");
1056 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
)
1058 return single_open(file
, acpi_video_bus_ROM_seq_show
, PDE(inode
)->data
);
1061 static int acpi_video_bus_POST_info_seq_show(struct seq_file
*seq
, void *offset
)
1063 struct acpi_video_bus
*video
= seq
->private;
1064 unsigned long options
;
1071 status
= acpi_video_bus_POST_options(video
, &options
);
1072 if (ACPI_SUCCESS(status
)) {
1073 if (!(options
& 1)) {
1074 printk(KERN_WARNING PREFIX
1075 "The motherboard VGA device is not listed as a possible POST device.\n");
1076 printk(KERN_WARNING PREFIX
1077 "This indicate a BIOS bug. Please contact the manufacturer.\n");
1079 printk("%lx\n", options
);
1080 seq_printf(seq
, "can POST: <intgrated video>");
1082 seq_printf(seq
, " <PCI video>");
1084 seq_printf(seq
, " <AGP video>");
1085 seq_putc(seq
, '\n');
1087 seq_printf(seq
, "<not supported>\n");
1093 acpi_video_bus_POST_info_open_fs(struct inode
*inode
, struct file
*file
)
1095 return single_open(file
, acpi_video_bus_POST_info_seq_show
,
1099 static int acpi_video_bus_POST_seq_show(struct seq_file
*seq
, void *offset
)
1101 struct acpi_video_bus
*video
= seq
->private;
1109 status
= acpi_video_bus_get_POST(video
, &id
);
1110 if (!ACPI_SUCCESS(status
)) {
1111 seq_printf(seq
, "<not supported>\n");
1114 seq_printf(seq
, "device posted is <%s>\n", device_decode
[id
& 3]);
1120 static int acpi_video_bus_DOS_seq_show(struct seq_file
*seq
, void *offset
)
1122 struct acpi_video_bus
*video
= seq
->private;
1125 seq_printf(seq
, "DOS setting: <%d>\n", video
->dos_setting
);
1130 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
)
1132 return single_open(file
, acpi_video_bus_POST_seq_show
,
1136 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
)
1138 return single_open(file
, acpi_video_bus_DOS_seq_show
, PDE(inode
)->data
);
1142 acpi_video_bus_write_POST(struct file
*file
,
1143 const char __user
* buffer
,
1144 size_t count
, loff_t
* data
)
1147 struct seq_file
*m
= file
->private_data
;
1148 struct acpi_video_bus
*video
= m
->private;
1149 char str
[12] = { 0 };
1150 unsigned long opt
, options
;
1153 if (!video
|| count
+ 1 > sizeof str
)
1156 status
= acpi_video_bus_POST_options(video
, &options
);
1157 if (!ACPI_SUCCESS(status
))
1160 if (copy_from_user(str
, buffer
, count
))
1164 opt
= strtoul(str
, NULL
, 0);
1168 /* just in case an OEM 'forget' the motherboard... */
1171 if (options
& (1ul << opt
)) {
1172 status
= acpi_video_bus_set_POST(video
, opt
);
1173 if (!ACPI_SUCCESS(status
))
1182 acpi_video_bus_write_DOS(struct file
*file
,
1183 const char __user
* buffer
,
1184 size_t count
, loff_t
* data
)
1187 struct seq_file
*m
= file
->private_data
;
1188 struct acpi_video_bus
*video
= m
->private;
1189 char str
[12] = { 0 };
1193 if (!video
|| count
+ 1 > sizeof str
)
1196 if (copy_from_user(str
, buffer
, count
))
1200 opt
= strtoul(str
, NULL
, 0);
1204 status
= acpi_video_bus_DOS(video
, opt
& 0x3, (opt
& 0x4) >> 2);
1206 if (!ACPI_SUCCESS(status
))
1212 static int acpi_video_bus_add_fs(struct acpi_device
*device
)
1214 struct proc_dir_entry
*entry
= NULL
;
1215 struct acpi_video_bus
*video
;
1218 video
= acpi_driver_data(device
);
1220 if (!acpi_device_dir(device
)) {
1221 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
),
1223 if (!acpi_device_dir(device
))
1225 video
->dir
= acpi_device_dir(device
);
1226 acpi_device_dir(device
)->owner
= THIS_MODULE
;
1230 entry
= create_proc_entry("info", S_IRUGO
, acpi_device_dir(device
));
1234 entry
->proc_fops
= &acpi_video_bus_info_fops
;
1235 entry
->data
= acpi_driver_data(device
);
1236 entry
->owner
= THIS_MODULE
;
1240 entry
= create_proc_entry("ROM", S_IRUGO
, acpi_device_dir(device
));
1244 entry
->proc_fops
= &acpi_video_bus_ROM_fops
;
1245 entry
->data
= acpi_driver_data(device
);
1246 entry
->owner
= THIS_MODULE
;
1249 /* 'POST_info' [R] */
1251 create_proc_entry("POST_info", S_IRUGO
, acpi_device_dir(device
));
1255 entry
->proc_fops
= &acpi_video_bus_POST_info_fops
;
1256 entry
->data
= acpi_driver_data(device
);
1257 entry
->owner
= THIS_MODULE
;
1262 create_proc_entry("POST", S_IFREG
| S_IRUGO
| S_IRUSR
,
1263 acpi_device_dir(device
));
1267 acpi_video_bus_POST_fops
.write
= acpi_video_bus_write_POST
;
1268 entry
->proc_fops
= &acpi_video_bus_POST_fops
;
1269 entry
->data
= acpi_driver_data(device
);
1270 entry
->owner
= THIS_MODULE
;
1275 create_proc_entry("DOS", S_IFREG
| S_IRUGO
| S_IRUSR
,
1276 acpi_device_dir(device
));
1280 acpi_video_bus_DOS_fops
.write
= acpi_video_bus_write_DOS
;
1281 entry
->proc_fops
= &acpi_video_bus_DOS_fops
;
1282 entry
->data
= acpi_driver_data(device
);
1283 entry
->owner
= THIS_MODULE
;
1289 static int acpi_video_bus_remove_fs(struct acpi_device
*device
)
1291 struct acpi_video_bus
*video
;
1294 video
= acpi_driver_data(device
);
1296 if (acpi_device_dir(device
)) {
1297 remove_proc_entry("info", acpi_device_dir(device
));
1298 remove_proc_entry("ROM", acpi_device_dir(device
));
1299 remove_proc_entry("POST_info", acpi_device_dir(device
));
1300 remove_proc_entry("POST", acpi_device_dir(device
));
1301 remove_proc_entry("DOS", acpi_device_dir(device
));
1302 remove_proc_entry(acpi_device_bid(device
), acpi_video_dir
);
1303 acpi_device_dir(device
) = NULL
;
1309 /* --------------------------------------------------------------------------
1311 -------------------------------------------------------------------------- */
1313 /* device interface */
1314 static struct acpi_video_device_attrib
*
1315 acpi_video_get_device_attr(struct acpi_video_bus
*video
, unsigned long device_id
)
1319 for(count
= 0; count
< video
->attached_count
; count
++)
1320 if((video
->attached_array
[count
].value
.int_val
& 0xffff) == device_id
)
1321 return &(video
->attached_array
[count
].value
.attrib
);
1326 acpi_video_bus_get_one_device(struct acpi_device
*device
,
1327 struct acpi_video_bus
*video
)
1329 unsigned long device_id
;
1331 struct acpi_video_device
*data
;
1332 struct acpi_video_device_attrib
* attribute
;
1334 if (!device
|| !video
)
1338 acpi_evaluate_integer(device
->handle
, "_ADR", NULL
, &device_id
);
1339 if (ACPI_SUCCESS(status
)) {
1341 data
= kzalloc(sizeof(struct acpi_video_device
), GFP_KERNEL
);
1345 strcpy(acpi_device_name(device
), ACPI_VIDEO_DEVICE_NAME
);
1346 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
1347 acpi_driver_data(device
) = data
;
1349 data
->device_id
= device_id
;
1350 data
->video
= video
;
1353 attribute
= acpi_video_get_device_attr(video
, device_id
);
1355 if((attribute
!= NULL
) && attribute
->device_id_scheme
) {
1356 switch (attribute
->display_type
) {
1357 case ACPI_VIDEO_DISPLAY_CRT
:
1358 data
->flags
.crt
= 1;
1360 case ACPI_VIDEO_DISPLAY_TV
:
1361 data
->flags
.tvout
= 1;
1363 case ACPI_VIDEO_DISPLAY_DVI
:
1364 data
->flags
.dvi
= 1;
1366 case ACPI_VIDEO_DISPLAY_LCD
:
1367 data
->flags
.lcd
= 1;
1370 data
->flags
.unknown
= 1;
1373 if(attribute
->bios_can_detect
)
1374 data
->flags
.bios
= 1;
1376 data
->flags
.unknown
= 1;
1378 acpi_video_device_bind(video
, data
);
1379 acpi_video_device_find_cap(data
);
1381 status
= acpi_install_notify_handler(device
->handle
,
1383 acpi_video_device_notify
,
1385 if (ACPI_FAILURE(status
)) {
1386 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
1387 "Error installing notify handler\n"));
1388 if(data
->brightness
)
1389 kfree(data
->brightness
->levels
);
1390 kfree(data
->brightness
);
1396 list_add_tail(&data
->entry
, &video
->video_device_list
);
1399 acpi_video_device_add_fs(device
);
1409 * video : video bus device
1414 * Enumerate the video device list of the video bus,
1415 * bind the ids with the corresponding video devices
1416 * under the video bus.
1419 static void acpi_video_device_rebind(struct acpi_video_bus
*video
)
1421 struct list_head
*node
, *next
;
1422 list_for_each_safe(node
, next
, &video
->video_device_list
) {
1423 struct acpi_video_device
*dev
=
1424 container_of(node
, struct acpi_video_device
, entry
);
1425 acpi_video_device_bind(video
, dev
);
1431 * video : video bus device
1432 * device : video output device under the video
1438 * Bind the ids with the corresponding video devices
1439 * under the video bus.
1443 acpi_video_device_bind(struct acpi_video_bus
*video
,
1444 struct acpi_video_device
*device
)
1448 #define IDS_VAL(i) video->attached_array[i].value.int_val
1449 #define IDS_BIND(i) video->attached_array[i].bind_info
1451 for (i
= 0; IDS_VAL(i
) != ACPI_VIDEO_HEAD_INVALID
&&
1452 i
< video
->attached_count
; i
++) {
1453 if (device
->device_id
== (IDS_VAL(i
) & 0xffff)) {
1454 IDS_BIND(i
) = device
;
1455 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "device_bind %d\n", i
));
1464 * video : video bus device
1469 * Call _DOD to enumerate all devices attached to display adapter
1473 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
)
1478 struct acpi_video_enumerated_device
*active_device_list
;
1479 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
1480 union acpi_object
*dod
= NULL
;
1481 union acpi_object
*obj
;
1483 status
= acpi_evaluate_object(video
->device
->handle
, "_DOD", NULL
, &buffer
);
1484 if (!ACPI_SUCCESS(status
)) {
1485 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _DOD"));
1489 dod
= buffer
.pointer
;
1490 if (!dod
|| (dod
->type
!= ACPI_TYPE_PACKAGE
)) {
1491 ACPI_EXCEPTION((AE_INFO
, status
, "Invalid _DOD data"));
1496 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Found %d video heads in _DOD\n",
1497 dod
->package
.count
));
1499 active_device_list
= kmalloc((1 +
1500 dod
->package
.count
) *
1502 acpi_video_enumerated_device
),
1505 if (!active_device_list
) {
1511 for (i
= 0; i
< dod
->package
.count
; i
++) {
1512 obj
= &dod
->package
.elements
[i
];
1514 if (obj
->type
!= ACPI_TYPE_INTEGER
) {
1515 printk(KERN_ERR PREFIX
"Invalid _DOD data\n");
1516 active_device_list
[i
].value
.int_val
=
1517 ACPI_VIDEO_HEAD_INVALID
;
1519 active_device_list
[i
].value
.int_val
= obj
->integer
.value
;
1520 active_device_list
[i
].bind_info
= NULL
;
1521 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "dod element[%d] = %d\n", i
,
1522 (int)obj
->integer
.value
));
1525 active_device_list
[count
].value
.int_val
= ACPI_VIDEO_HEAD_END
;
1527 kfree(video
->attached_array
);
1529 video
->attached_array
= active_device_list
;
1530 video
->attached_count
= count
;
1532 kfree(buffer
.pointer
);
1538 * video : video bus device
1539 * event : Nontify Event
1544 * 1. Find out the current active output device.
1545 * 2. Identify the next output device to switch
1546 * 3. call _DSS to do actual switch.
1549 static int acpi_video_switch_output(struct acpi_video_bus
*video
, int event
)
1551 struct list_head
*node
, *next
;
1552 struct acpi_video_device
*dev
= NULL
;
1553 struct acpi_video_device
*dev_next
= NULL
;
1554 struct acpi_video_device
*dev_prev
= NULL
;
1555 unsigned long state
;
1559 list_for_each_safe(node
, next
, &video
->video_device_list
) {
1560 dev
= container_of(node
, struct acpi_video_device
, entry
);
1561 status
= acpi_video_device_get_state(dev
, &state
);
1564 container_of(node
->next
, struct acpi_video_device
,
1567 container_of(node
->prev
, struct acpi_video_device
,
1572 dev_next
= container_of(node
->next
, struct acpi_video_device
, entry
);
1573 dev_prev
= container_of(node
->prev
, struct acpi_video_device
, entry
);
1576 case ACPI_VIDEO_NOTIFY_CYCLE
:
1577 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
:
1578 acpi_video_device_set_state(dev
, 0);
1579 acpi_video_device_set_state(dev_next
, 0x80000001);
1581 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT
:
1582 acpi_video_device_set_state(dev
, 0);
1583 acpi_video_device_set_state(dev_prev
, 0x80000001);
1592 acpi_video_get_next_level(struct acpi_video_device
*device
,
1593 u32 level_current
, u32 event
)
1595 int min
, max
, min_above
, max_below
, i
, l
;
1596 max
= max_below
= 0;
1597 min
= min_above
= 255;
1598 for (i
= 0; i
< device
->brightness
->count
; i
++) {
1599 l
= device
->brightness
->levels
[i
];
1604 if (l
< min_above
&& l
> level_current
)
1606 if (l
> max_below
&& l
< level_current
)
1611 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
:
1612 return (level_current
< max
) ? min_above
: min
;
1613 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
:
1614 return (level_current
< max
) ? min_above
: max
;
1615 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
:
1616 return (level_current
> min
) ? max_below
: min
;
1617 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
:
1618 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
:
1621 return level_current
;
1626 acpi_video_switch_brightness(struct acpi_video_device
*device
, int event
)
1628 unsigned long level_current
, level_next
;
1629 acpi_video_device_lcd_get_level_current(device
, &level_current
);
1630 level_next
= acpi_video_get_next_level(device
, level_current
, event
);
1631 acpi_video_device_lcd_set_level(device
, level_next
);
1635 acpi_video_bus_get_devices(struct acpi_video_bus
*video
,
1636 struct acpi_device
*device
)
1639 struct list_head
*node
, *next
;
1642 acpi_video_device_enumerate(video
);
1644 list_for_each_safe(node
, next
, &device
->children
) {
1645 struct acpi_device
*dev
=
1646 list_entry(node
, struct acpi_device
, node
);
1651 status
= acpi_video_bus_get_one_device(dev
, video
);
1652 if (ACPI_FAILURE(status
)) {
1653 ACPI_EXCEPTION((AE_INFO
, status
, "Cant attach device"));
1661 static int acpi_video_bus_put_one_device(struct acpi_video_device
*device
)
1664 struct acpi_video_bus
*video
;
1667 if (!device
|| !device
->video
)
1670 video
= device
->video
;
1673 list_del(&device
->entry
);
1675 acpi_video_device_remove_fs(device
->dev
);
1677 status
= acpi_remove_notify_handler(device
->dev
->handle
,
1679 acpi_video_device_notify
);
1680 if (device
->backlight
){
1681 backlight_device_unregister(device
->backlight
);
1682 kfree(device
->data
);
1687 static int acpi_video_bus_put_devices(struct acpi_video_bus
*video
)
1690 struct list_head
*node
, *next
;
1693 list_for_each_safe(node
, next
, &video
->video_device_list
) {
1694 struct acpi_video_device
*data
=
1695 list_entry(node
, struct acpi_video_device
, entry
);
1699 status
= acpi_video_bus_put_one_device(data
);
1700 if (ACPI_FAILURE(status
))
1701 printk(KERN_WARNING PREFIX
1702 "hhuuhhuu bug in acpi video driver.\n");
1704 if (data
->brightness
)
1705 kfree(data
->brightness
->levels
);
1706 kfree(data
->brightness
);
1713 /* acpi_video interface */
1715 static int acpi_video_bus_start_devices(struct acpi_video_bus
*video
)
1717 return acpi_video_bus_DOS(video
, 1, 0);
1720 static int acpi_video_bus_stop_devices(struct acpi_video_bus
*video
)
1722 return acpi_video_bus_DOS(video
, 0, 1);
1725 static void acpi_video_bus_notify(acpi_handle handle
, u32 event
, void *data
)
1727 struct acpi_video_bus
*video
= data
;
1728 struct acpi_device
*device
= NULL
;
1730 printk("video bus notify\n");
1735 device
= video
->device
;
1738 case ACPI_VIDEO_NOTIFY_SWITCH
: /* User request that a switch occur,
1739 * most likely via hotkey. */
1740 acpi_bus_generate_event(device
, event
, 0);
1743 case ACPI_VIDEO_NOTIFY_PROBE
: /* User plug or remove a video
1745 acpi_video_device_enumerate(video
);
1746 acpi_video_device_rebind(video
);
1747 acpi_video_switch_output(video
, event
);
1748 acpi_bus_generate_event(device
, event
, 0);
1751 case ACPI_VIDEO_NOTIFY_CYCLE
: /* Cycle Display output hotkey pressed. */
1752 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
: /* Next Display output hotkey pressed. */
1753 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT
: /* previous Display output hotkey pressed. */
1754 acpi_video_switch_output(video
, event
);
1755 acpi_bus_generate_event(device
, event
, 0);
1759 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
1760 "Unsupported event [0x%x]\n", event
));
1767 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
)
1769 struct acpi_video_device
*video_device
= data
;
1770 struct acpi_device
*device
= NULL
;
1775 device
= video_device
->dev
;
1778 case ACPI_VIDEO_NOTIFY_SWITCH
: /* change in status (cycle output device) */
1779 case ACPI_VIDEO_NOTIFY_PROBE
: /* change in status (output device status) */
1780 acpi_bus_generate_event(device
, event
, 0);
1782 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
: /* Cycle brightness */
1783 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
: /* Increase brightness */
1784 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
: /* Decrease brightness */
1785 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
: /* zero brightnesss */
1786 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
: /* display device off */
1787 acpi_video_switch_brightness(video_device
, event
);
1788 acpi_bus_generate_event(device
, event
, 0);
1791 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
1792 "Unsupported event [0x%x]\n", event
));
1798 static int acpi_video_bus_add(struct acpi_device
*device
)
1801 acpi_status status
= 0;
1802 struct acpi_video_bus
*video
= NULL
;
1808 video
= kzalloc(sizeof(struct acpi_video_bus
), GFP_KERNEL
);
1812 video
->device
= device
;
1813 strcpy(acpi_device_name(device
), ACPI_VIDEO_BUS_NAME
);
1814 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
1815 acpi_driver_data(device
) = video
;
1817 acpi_video_bus_find_cap(video
);
1818 result
= acpi_video_bus_check(video
);
1822 result
= acpi_video_bus_add_fs(device
);
1826 init_MUTEX(&video
->sem
);
1827 INIT_LIST_HEAD(&video
->video_device_list
);
1829 acpi_video_bus_get_devices(video
, device
);
1830 acpi_video_bus_start_devices(video
);
1832 status
= acpi_install_notify_handler(device
->handle
,
1834 acpi_video_bus_notify
, video
);
1835 if (ACPI_FAILURE(status
)) {
1836 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
1837 "Error installing notify handler\n"));
1838 acpi_video_bus_stop_devices(video
);
1839 acpi_video_bus_put_devices(video
);
1840 kfree(video
->attached_array
);
1841 acpi_video_bus_remove_fs(device
);
1846 printk(KERN_INFO PREFIX
"%s [%s] (multi-head: %s rom: %s post: %s)\n",
1847 ACPI_VIDEO_DEVICE_NAME
, acpi_device_bid(device
),
1848 video
->flags
.multihead
? "yes" : "no",
1849 video
->flags
.rom
? "yes" : "no",
1850 video
->flags
.post
? "yes" : "no");
1859 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
)
1861 acpi_status status
= 0;
1862 struct acpi_video_bus
*video
= NULL
;
1865 if (!device
|| !acpi_driver_data(device
))
1868 video
= acpi_driver_data(device
);
1870 acpi_video_bus_stop_devices(video
);
1872 status
= acpi_remove_notify_handler(video
->device
->handle
,
1874 acpi_video_bus_notify
);
1876 acpi_video_bus_put_devices(video
);
1877 acpi_video_bus_remove_fs(device
);
1879 kfree(video
->attached_array
);
1885 static int __init
acpi_video_init(void)
1891 acpi_dbg_level = 0xFFFFFFFF;
1892 acpi_dbg_layer = 0x08000000;
1895 acpi_video_dir
= proc_mkdir(ACPI_VIDEO_CLASS
, acpi_root_dir
);
1896 if (!acpi_video_dir
)
1898 acpi_video_dir
->owner
= THIS_MODULE
;
1900 result
= acpi_bus_register_driver(&acpi_video_bus
);
1902 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
1909 static void __exit
acpi_video_exit(void)
1912 acpi_bus_unregister_driver(&acpi_video_bus
);
1914 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
1919 module_init(acpi_video_init
);
1920 module_exit(acpi_video_exit
);