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 <asm/uaccess.h>
37 #include <acpi/acpi_bus.h>
38 #include <acpi/acpi_drivers.h>
40 #define ACPI_VIDEO_COMPONENT 0x08000000
41 #define ACPI_VIDEO_CLASS "video"
42 #define ACPI_VIDEO_DRIVER_NAME "ACPI Video Driver"
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)
60 #define _COMPONENT ACPI_VIDEO_COMPONENT
61 ACPI_MODULE_NAME("acpi_video")
63 MODULE_AUTHOR("Bruno Ducrot");
64 MODULE_DESCRIPTION(ACPI_VIDEO_DRIVER_NAME
);
65 MODULE_LICENSE("GPL");
67 static int acpi_video_bus_add(struct acpi_device
*device
);
68 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
);
69 static int acpi_video_bus_match(struct acpi_device
*device
,
70 struct acpi_driver
*driver
);
72 static struct acpi_driver acpi_video_bus
= {
73 .name
= ACPI_VIDEO_DRIVER_NAME
,
74 .class = ACPI_VIDEO_CLASS
,
76 .add
= acpi_video_bus_add
,
77 .remove
= acpi_video_bus_remove
,
78 .match
= acpi_video_bus_match
,
82 struct acpi_video_bus_flags
{
83 u8 multihead
:1; /* can switch video heads */
84 u8 rom
:1; /* can retrieve a video rom */
85 u8 post
:1; /* can configure the head to */
89 struct acpi_video_bus_cap
{
90 u8 _DOS
:1; /*Enable/Disable output switching */
91 u8 _DOD
:1; /*Enumerate all devices attached to display adapter */
92 u8 _ROM
:1; /*Get ROM Data */
93 u8 _GPD
:1; /*Get POST Device */
94 u8 _SPD
:1; /*Set POST Device */
95 u8 _VPO
:1; /*Video POST Options */
99 struct acpi_video_device_attrib
{
100 u32 display_index
:4; /* A zero-based instance of the Display */
101 u32 display_port_attachment
:4; /*This field differenates displays type */
102 u32 display_type
:4; /*Describe the specific type in use */
103 u32 vendor_specific
:4; /*Chipset Vendor Specifi */
104 u32 bios_can_detect
:1; /*BIOS can detect the device */
105 u32 depend_on_vga
:1; /*Non-VGA output device whose power is related to
107 u32 pipe_id
:3; /*For VGA multiple-head devices. */
108 u32 reserved
:10; /*Must be 0 */
109 u32 device_id_scheme
:1; /*Device ID Scheme */
112 struct acpi_video_enumerated_device
{
115 struct acpi_video_device_attrib attrib
;
117 struct acpi_video_device
*bind_info
;
120 struct acpi_video_bus
{
121 struct acpi_device
*device
;
123 struct acpi_video_enumerated_device
*attached_array
;
125 struct acpi_video_bus_cap cap
;
126 struct acpi_video_bus_flags flags
;
127 struct semaphore sem
;
128 struct list_head video_device_list
;
129 struct proc_dir_entry
*dir
;
132 struct acpi_video_device_flags
{
141 struct acpi_video_device_cap
{
142 u8 _ADR
:1; /*Return the unique ID */
143 u8 _BCL
:1; /*Query list of brightness control levels supported */
144 u8 _BCM
:1; /*Set the brightness level */
145 u8 _DDC
:1; /*Return the EDID for this device */
146 u8 _DCS
:1; /*Return status of output device */
147 u8 _DGS
:1; /*Query graphics state */
148 u8 _DSS
:1; /*Device state set */
152 struct acpi_video_device_brightness
{
158 struct acpi_video_device
{
159 unsigned long device_id
;
160 struct acpi_video_device_flags flags
;
161 struct acpi_video_device_cap cap
;
162 struct list_head entry
;
163 struct acpi_video_bus
*video
;
164 struct acpi_device
*dev
;
165 struct acpi_video_device_brightness
*brightness
;
169 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
);
170 static struct file_operations acpi_video_bus_info_fops
= {
171 .open
= acpi_video_bus_info_open_fs
,
174 .release
= single_release
,
177 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
);
178 static struct file_operations acpi_video_bus_ROM_fops
= {
179 .open
= acpi_video_bus_ROM_open_fs
,
182 .release
= single_release
,
185 static int acpi_video_bus_POST_info_open_fs(struct inode
*inode
,
187 static struct file_operations acpi_video_bus_POST_info_fops
= {
188 .open
= acpi_video_bus_POST_info_open_fs
,
191 .release
= single_release
,
194 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
);
195 static struct file_operations acpi_video_bus_POST_fops
= {
196 .open
= acpi_video_bus_POST_open_fs
,
199 .release
= single_release
,
202 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
);
203 static struct file_operations acpi_video_bus_DOS_fops
= {
204 .open
= acpi_video_bus_DOS_open_fs
,
207 .release
= single_release
,
211 static int acpi_video_device_info_open_fs(struct inode
*inode
,
213 static struct file_operations acpi_video_device_info_fops
= {
214 .open
= acpi_video_device_info_open_fs
,
217 .release
= single_release
,
220 static int acpi_video_device_state_open_fs(struct inode
*inode
,
222 static struct file_operations acpi_video_device_state_fops
= {
223 .open
= acpi_video_device_state_open_fs
,
226 .release
= single_release
,
229 static int acpi_video_device_brightness_open_fs(struct inode
*inode
,
231 static struct file_operations acpi_video_device_brightness_fops
= {
232 .open
= acpi_video_device_brightness_open_fs
,
235 .release
= single_release
,
238 static int acpi_video_device_EDID_open_fs(struct inode
*inode
,
240 static struct file_operations acpi_video_device_EDID_fops
= {
241 .open
= acpi_video_device_EDID_open_fs
,
244 .release
= single_release
,
247 static char device_decode
[][30] = {
248 "motherboard VGA device",
254 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
);
255 static void acpi_video_device_rebind(struct acpi_video_bus
*video
);
256 static void acpi_video_device_bind(struct acpi_video_bus
*video
,
257 struct acpi_video_device
*device
);
258 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
);
259 static int acpi_video_switch_output(struct acpi_video_bus
*video
, int event
);
260 static int acpi_video_get_next_level(struct acpi_video_device
*device
,
261 u32 level_current
, u32 event
);
262 static void acpi_video_switch_brightness(struct acpi_video_device
*device
,
265 /* --------------------------------------------------------------------------
267 -------------------------------------------------------------------------- */
272 acpi_video_device_query(struct acpi_video_device
*device
, unsigned long *state
)
276 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DGS", NULL
, state
);
282 acpi_video_device_get_state(struct acpi_video_device
*device
,
283 unsigned long *state
)
287 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DCS", NULL
, state
);
293 acpi_video_device_set_state(struct acpi_video_device
*device
, int state
)
296 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
297 struct acpi_object_list args
= { 1, &arg0
};
301 arg0
.integer
.value
= state
;
302 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DSS", &args
, &ret
);
308 acpi_video_device_lcd_query_levels(struct acpi_video_device
*device
,
309 union acpi_object
**levels
)
312 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
313 union acpi_object
*obj
;
318 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCL", NULL
, &buffer
);
319 if (!ACPI_SUCCESS(status
))
321 obj
= (union acpi_object
*)buffer
.pointer
;
322 if (!obj
|| (obj
->type
!= ACPI_TYPE_PACKAGE
)) {
323 printk(KERN_ERR PREFIX
"Invalid _BCL data\n");
333 kfree(buffer
.pointer
);
339 acpi_video_device_lcd_set_level(struct acpi_video_device
*device
, int level
)
342 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
343 struct acpi_object_list args
= { 1, &arg0
};
346 arg0
.integer
.value
= level
;
347 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCM", &args
, NULL
);
349 printk(KERN_DEBUG
"set_level status: %x\n", status
);
354 acpi_video_device_lcd_get_level_current(struct acpi_video_device
*device
,
355 unsigned long *level
)
359 status
= acpi_evaluate_integer(device
->dev
->handle
, "_BQC", NULL
, level
);
365 acpi_video_device_EDID(struct acpi_video_device
*device
,
366 union acpi_object
**edid
, ssize_t length
)
369 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
370 union acpi_object
*obj
;
371 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
372 struct acpi_object_list args
= { 1, &arg0
};
380 arg0
.integer
.value
= 1;
381 else if (length
== 256)
382 arg0
.integer
.value
= 2;
386 status
= acpi_evaluate_object(device
->dev
->handle
, "_DDC", &args
, &buffer
);
387 if (ACPI_FAILURE(status
))
390 obj
= buffer
.pointer
;
392 if (obj
&& obj
->type
== ACPI_TYPE_BUFFER
)
395 printk(KERN_ERR PREFIX
"Invalid _DDC data\n");
406 acpi_video_bus_set_POST(struct acpi_video_bus
*video
, unsigned long option
)
410 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
411 struct acpi_object_list args
= { 1, &arg0
};
414 arg0
.integer
.value
= option
;
416 status
= acpi_evaluate_integer(video
->device
->handle
, "_SPD", &args
, &tmp
);
417 if (ACPI_SUCCESS(status
))
418 status
= tmp
? (-EINVAL
) : (AE_OK
);
424 acpi_video_bus_get_POST(struct acpi_video_bus
*video
, unsigned long *id
)
428 status
= acpi_evaluate_integer(video
->device
->handle
, "_GPD", NULL
, id
);
434 acpi_video_bus_POST_options(struct acpi_video_bus
*video
,
435 unsigned long *options
)
439 status
= acpi_evaluate_integer(video
->device
->handle
, "_VPO", NULL
, options
);
447 * video : video bus device pointer
449 * 0. The system BIOS should NOT automatically switch(toggle)
450 * the active display output.
451 * 1. The system BIOS should automatically switch (toggle) the
452 * active display output. No swich event.
453 * 2. The _DGS value should be locked.
454 * 3. The system BIOS should not automatically switch (toggle) the
455 * active display output, but instead generate the display switch
458 * 0. The system BIOS should automatically control the brightness level
459 * of the LCD, when the power changes from AC to DC
460 * 1. The system BIOS should NOT automatically control the brightness
461 * level of the LCD, when the power changes from AC to DC.
467 acpi_video_bus_DOS(struct acpi_video_bus
*video
, int bios_flag
, int lcd_flag
)
469 acpi_integer status
= 0;
470 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
471 struct acpi_object_list args
= { 1, &arg0
};
474 if (bios_flag
< 0 || bios_flag
> 3 || lcd_flag
< 0 || lcd_flag
> 1) {
478 arg0
.integer
.value
= (lcd_flag
<< 2) | bios_flag
;
479 video
->dos_setting
= arg0
.integer
.value
;
480 acpi_evaluate_object(video
->device
->handle
, "_DOS", &args
, NULL
);
488 * device : video output device (LCD, CRT, ..)
493 * Find out all required AML method defined under the output
497 static void acpi_video_device_find_cap(struct acpi_video_device
*device
)
500 acpi_handle h_dummy1
;
502 union acpi_object
*obj
= NULL
;
503 struct acpi_video_device_brightness
*br
= NULL
;
506 memset(&device
->cap
, 0, 4);
508 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_ADR", &h_dummy1
))) {
509 device
->cap
._ADR
= 1;
511 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCL", &h_dummy1
))) {
512 device
->cap
._BCL
= 1;
514 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCM", &h_dummy1
))) {
515 device
->cap
._BCM
= 1;
517 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DDC", &h_dummy1
))) {
518 device
->cap
._DDC
= 1;
520 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DCS", &h_dummy1
))) {
521 device
->cap
._DCS
= 1;
523 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DGS", &h_dummy1
))) {
524 device
->cap
._DGS
= 1;
526 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DSS", &h_dummy1
))) {
527 device
->cap
._DSS
= 1;
530 status
= acpi_video_device_lcd_query_levels(device
, &obj
);
532 if (obj
&& obj
->type
== ACPI_TYPE_PACKAGE
&& obj
->package
.count
>= 2) {
534 union acpi_object
*o
;
536 br
= kmalloc(sizeof(*br
), GFP_KERNEL
);
538 printk(KERN_ERR
"can't allocate memory\n");
540 memset(br
, 0, sizeof(*br
));
541 br
->levels
= kmalloc(obj
->package
.count
*
542 sizeof *(br
->levels
), GFP_KERNEL
);
546 for (i
= 0; i
< obj
->package
.count
; i
++) {
547 o
= (union acpi_object
*)&obj
->package
.
549 if (o
->type
!= ACPI_TYPE_INTEGER
) {
550 printk(KERN_ERR PREFIX
"Invalid data\n");
553 br
->levels
[count
] = (u32
) o
->integer
.value
;
562 device
->brightness
= br
;
563 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
564 "found %d brightness levels\n",
577 * device : video output device (VGA)
582 * Find out all required AML method defined under the video bus device.
585 static void acpi_video_bus_find_cap(struct acpi_video_bus
*video
)
587 acpi_handle h_dummy1
;
589 memset(&video
->cap
, 0, 4);
590 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOS", &h_dummy1
))) {
593 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOD", &h_dummy1
))) {
596 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_ROM", &h_dummy1
))) {
599 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_GPD", &h_dummy1
))) {
602 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_SPD", &h_dummy1
))) {
605 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_VPO", &h_dummy1
))) {
611 * Check whether the video bus device has required AML method to
612 * support the desired features
615 static int acpi_video_bus_check(struct acpi_video_bus
*video
)
617 acpi_status status
= -ENOENT
;
623 /* Since there is no HID, CID and so on for VGA driver, we have
624 * to check well known required nodes.
627 /* Does this device able to support video switching ? */
628 if (video
->cap
._DOS
) {
629 video
->flags
.multihead
= 1;
633 /* Does this device able to retrieve a retrieve a video ROM ? */
634 if (video
->cap
._ROM
) {
635 video
->flags
.rom
= 1;
639 /* Does this device able to configure which video device to POST ? */
640 if (video
->cap
._GPD
&& video
->cap
._SPD
&& video
->cap
._VPO
) {
641 video
->flags
.post
= 1;
648 /* --------------------------------------------------------------------------
650 -------------------------------------------------------------------------- */
652 static struct proc_dir_entry
*acpi_video_dir
;
656 static int acpi_video_device_info_seq_show(struct seq_file
*seq
, void *offset
)
658 struct acpi_video_device
*dev
= seq
->private;
664 seq_printf(seq
, "device_id: 0x%04x\n", (u32
) dev
->device_id
);
665 seq_printf(seq
, "type: ");
667 seq_printf(seq
, "CRT\n");
668 else if (dev
->flags
.lcd
)
669 seq_printf(seq
, "LCD\n");
670 else if (dev
->flags
.tvout
)
671 seq_printf(seq
, "TVOUT\n");
673 seq_printf(seq
, "UNKNOWN\n");
675 seq_printf(seq
, "known by bios: %s\n", dev
->flags
.bios
? "yes" : "no");
682 acpi_video_device_info_open_fs(struct inode
*inode
, struct file
*file
)
684 return single_open(file
, acpi_video_device_info_seq_show
,
688 static int acpi_video_device_state_seq_show(struct seq_file
*seq
, void *offset
)
691 struct acpi_video_device
*dev
= seq
->private;
698 status
= acpi_video_device_get_state(dev
, &state
);
699 seq_printf(seq
, "state: ");
700 if (ACPI_SUCCESS(status
))
701 seq_printf(seq
, "0x%02lx\n", state
);
703 seq_printf(seq
, "<not supported>\n");
705 status
= acpi_video_device_query(dev
, &state
);
706 seq_printf(seq
, "query: ");
707 if (ACPI_SUCCESS(status
))
708 seq_printf(seq
, "0x%02lx\n", state
);
710 seq_printf(seq
, "<not supported>\n");
717 acpi_video_device_state_open_fs(struct inode
*inode
, struct file
*file
)
719 return single_open(file
, acpi_video_device_state_seq_show
,
724 acpi_video_device_write_state(struct file
*file
,
725 const char __user
* buffer
,
726 size_t count
, loff_t
* data
)
729 struct seq_file
*m
= file
->private_data
;
730 struct acpi_video_device
*dev
= m
->private;
731 char str
[12] = { 0 };
735 if (!dev
|| count
+ 1 > sizeof str
)
738 if (copy_from_user(str
, buffer
, count
))
742 state
= simple_strtoul(str
, NULL
, 0);
743 state
&= ((1ul << 31) | (1ul << 30) | (1ul << 0));
745 status
= acpi_video_device_set_state(dev
, state
);
754 acpi_video_device_brightness_seq_show(struct seq_file
*seq
, void *offset
)
756 struct acpi_video_device
*dev
= seq
->private;
760 if (!dev
|| !dev
->brightness
) {
761 seq_printf(seq
, "<not supported>\n");
765 seq_printf(seq
, "levels: ");
766 for (i
= 0; i
< dev
->brightness
->count
; i
++)
767 seq_printf(seq
, " %d", dev
->brightness
->levels
[i
]);
768 seq_printf(seq
, "\ncurrent: %d\n", dev
->brightness
->curr
);
774 acpi_video_device_brightness_open_fs(struct inode
*inode
, struct file
*file
)
776 return single_open(file
, acpi_video_device_brightness_seq_show
,
781 acpi_video_device_write_brightness(struct file
*file
,
782 const char __user
* buffer
,
783 size_t count
, loff_t
* data
)
785 struct seq_file
*m
= file
->private_data
;
786 struct acpi_video_device
*dev
= m
->private;
788 unsigned int level
= 0;
792 if (!dev
|| !dev
->brightness
|| count
+ 1 > sizeof str
)
795 if (copy_from_user(str
, buffer
, count
))
799 level
= simple_strtoul(str
, NULL
, 0);
804 /* validate though the list of available levels */
805 for (i
= 0; i
< dev
->brightness
->count
; i
++)
806 if (level
== dev
->brightness
->levels
[i
]) {
808 (acpi_video_device_lcd_set_level(dev
, level
)))
809 dev
->brightness
->curr
= level
;
816 static int acpi_video_device_EDID_seq_show(struct seq_file
*seq
, void *offset
)
818 struct acpi_video_device
*dev
= seq
->private;
821 union acpi_object
*edid
= NULL
;
827 status
= acpi_video_device_EDID(dev
, &edid
, 128);
828 if (ACPI_FAILURE(status
)) {
829 status
= acpi_video_device_EDID(dev
, &edid
, 256);
832 if (ACPI_FAILURE(status
)) {
836 if (edid
&& edid
->type
== ACPI_TYPE_BUFFER
) {
837 for (i
= 0; i
< edid
->buffer
.length
; i
++)
838 seq_putc(seq
, edid
->buffer
.pointer
[i
]);
843 seq_printf(seq
, "<not supported>\n");
851 acpi_video_device_EDID_open_fs(struct inode
*inode
, struct file
*file
)
853 return single_open(file
, acpi_video_device_EDID_seq_show
,
857 static int acpi_video_device_add_fs(struct acpi_device
*device
)
859 struct proc_dir_entry
*entry
= NULL
;
860 struct acpi_video_device
*vid_dev
;
866 vid_dev
= acpi_driver_data(device
);
870 if (!acpi_device_dir(device
)) {
871 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
),
872 vid_dev
->video
->dir
);
873 if (!acpi_device_dir(device
))
875 acpi_device_dir(device
)->owner
= THIS_MODULE
;
879 entry
= create_proc_entry("info", S_IRUGO
, acpi_device_dir(device
));
883 entry
->proc_fops
= &acpi_video_device_info_fops
;
884 entry
->data
= acpi_driver_data(device
);
885 entry
->owner
= THIS_MODULE
;
890 create_proc_entry("state", S_IFREG
| S_IRUGO
| S_IWUSR
,
891 acpi_device_dir(device
));
895 acpi_video_device_state_fops
.write
= acpi_video_device_write_state
;
896 entry
->proc_fops
= &acpi_video_device_state_fops
;
897 entry
->data
= acpi_driver_data(device
);
898 entry
->owner
= THIS_MODULE
;
901 /* 'brightness' [R/W] */
903 create_proc_entry("brightness", S_IFREG
| S_IRUGO
| S_IWUSR
,
904 acpi_device_dir(device
));
908 acpi_video_device_brightness_fops
.write
= acpi_video_device_write_brightness
;
909 entry
->proc_fops
= &acpi_video_device_brightness_fops
;
910 entry
->data
= acpi_driver_data(device
);
911 entry
->owner
= THIS_MODULE
;
915 entry
= create_proc_entry("EDID", S_IRUGO
, acpi_device_dir(device
));
919 entry
->proc_fops
= &acpi_video_device_EDID_fops
;
920 entry
->data
= acpi_driver_data(device
);
921 entry
->owner
= THIS_MODULE
;
927 static int acpi_video_device_remove_fs(struct acpi_device
*device
)
929 struct acpi_video_device
*vid_dev
;
931 vid_dev
= acpi_driver_data(device
);
932 if (!vid_dev
|| !vid_dev
->video
|| !vid_dev
->video
->dir
)
935 if (acpi_device_dir(device
)) {
936 remove_proc_entry("info", acpi_device_dir(device
));
937 remove_proc_entry("state", acpi_device_dir(device
));
938 remove_proc_entry("brightness", acpi_device_dir(device
));
939 remove_proc_entry("EDID", acpi_device_dir(device
));
940 remove_proc_entry(acpi_device_bid(device
), vid_dev
->video
->dir
);
941 acpi_device_dir(device
) = NULL
;
948 static int acpi_video_bus_info_seq_show(struct seq_file
*seq
, void *offset
)
950 struct acpi_video_bus
*video
= seq
->private;
956 seq_printf(seq
, "Switching heads: %s\n",
957 video
->flags
.multihead
? "yes" : "no");
958 seq_printf(seq
, "Video ROM: %s\n",
959 video
->flags
.rom
? "yes" : "no");
960 seq_printf(seq
, "Device to be POSTed on boot: %s\n",
961 video
->flags
.post
? "yes" : "no");
967 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
)
969 return single_open(file
, acpi_video_bus_info_seq_show
,
973 static int acpi_video_bus_ROM_seq_show(struct seq_file
*seq
, void *offset
)
975 struct acpi_video_bus
*video
= seq
->private;
981 printk(KERN_INFO PREFIX
"Please implement %s\n", __FUNCTION__
);
982 seq_printf(seq
, "<TODO>\n");
988 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
)
990 return single_open(file
, acpi_video_bus_ROM_seq_show
, PDE(inode
)->data
);
993 static int acpi_video_bus_POST_info_seq_show(struct seq_file
*seq
, void *offset
)
995 struct acpi_video_bus
*video
= seq
->private;
996 unsigned long options
;
1003 status
= acpi_video_bus_POST_options(video
, &options
);
1004 if (ACPI_SUCCESS(status
)) {
1005 if (!(options
& 1)) {
1006 printk(KERN_WARNING PREFIX
1007 "The motherboard VGA device is not listed as a possible POST device.\n");
1008 printk(KERN_WARNING PREFIX
1009 "This indicate a BIOS bug. Please contact the manufacturer.\n");
1011 printk("%lx\n", options
);
1012 seq_printf(seq
, "can POST: <intgrated video>");
1014 seq_printf(seq
, " <PCI video>");
1016 seq_printf(seq
, " <AGP video>");
1017 seq_putc(seq
, '\n');
1019 seq_printf(seq
, "<not supported>\n");
1025 acpi_video_bus_POST_info_open_fs(struct inode
*inode
, struct file
*file
)
1027 return single_open(file
, acpi_video_bus_POST_info_seq_show
,
1031 static int acpi_video_bus_POST_seq_show(struct seq_file
*seq
, void *offset
)
1033 struct acpi_video_bus
*video
= seq
->private;
1041 status
= acpi_video_bus_get_POST(video
, &id
);
1042 if (!ACPI_SUCCESS(status
)) {
1043 seq_printf(seq
, "<not supported>\n");
1046 seq_printf(seq
, "device posted is <%s>\n", device_decode
[id
& 3]);
1052 static int acpi_video_bus_DOS_seq_show(struct seq_file
*seq
, void *offset
)
1054 struct acpi_video_bus
*video
= seq
->private;
1057 seq_printf(seq
, "DOS setting: <%d>\n", video
->dos_setting
);
1062 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
)
1064 return single_open(file
, acpi_video_bus_POST_seq_show
,
1068 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
)
1070 return single_open(file
, acpi_video_bus_DOS_seq_show
, PDE(inode
)->data
);
1074 acpi_video_bus_write_POST(struct file
*file
,
1075 const char __user
* buffer
,
1076 size_t count
, loff_t
* data
)
1079 struct seq_file
*m
= file
->private_data
;
1080 struct acpi_video_bus
*video
= m
->private;
1081 char str
[12] = { 0 };
1082 unsigned long opt
, options
;
1085 if (!video
|| count
+ 1 > sizeof str
)
1088 status
= acpi_video_bus_POST_options(video
, &options
);
1089 if (!ACPI_SUCCESS(status
))
1092 if (copy_from_user(str
, buffer
, count
))
1096 opt
= strtoul(str
, NULL
, 0);
1100 /* just in case an OEM 'forget' the motherboard... */
1103 if (options
& (1ul << opt
)) {
1104 status
= acpi_video_bus_set_POST(video
, opt
);
1105 if (!ACPI_SUCCESS(status
))
1114 acpi_video_bus_write_DOS(struct file
*file
,
1115 const char __user
* buffer
,
1116 size_t count
, loff_t
* data
)
1119 struct seq_file
*m
= file
->private_data
;
1120 struct acpi_video_bus
*video
= m
->private;
1121 char str
[12] = { 0 };
1125 if (!video
|| count
+ 1 > sizeof str
)
1128 if (copy_from_user(str
, buffer
, count
))
1132 opt
= strtoul(str
, NULL
, 0);
1136 status
= acpi_video_bus_DOS(video
, opt
& 0x3, (opt
& 0x4) >> 2);
1138 if (!ACPI_SUCCESS(status
))
1144 static int acpi_video_bus_add_fs(struct acpi_device
*device
)
1146 struct proc_dir_entry
*entry
= NULL
;
1147 struct acpi_video_bus
*video
;
1150 video
= acpi_driver_data(device
);
1152 if (!acpi_device_dir(device
)) {
1153 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
),
1155 if (!acpi_device_dir(device
))
1157 video
->dir
= acpi_device_dir(device
);
1158 acpi_device_dir(device
)->owner
= THIS_MODULE
;
1162 entry
= create_proc_entry("info", S_IRUGO
, acpi_device_dir(device
));
1166 entry
->proc_fops
= &acpi_video_bus_info_fops
;
1167 entry
->data
= acpi_driver_data(device
);
1168 entry
->owner
= THIS_MODULE
;
1172 entry
= create_proc_entry("ROM", S_IRUGO
, acpi_device_dir(device
));
1176 entry
->proc_fops
= &acpi_video_bus_ROM_fops
;
1177 entry
->data
= acpi_driver_data(device
);
1178 entry
->owner
= THIS_MODULE
;
1181 /* 'POST_info' [R] */
1183 create_proc_entry("POST_info", S_IRUGO
, acpi_device_dir(device
));
1187 entry
->proc_fops
= &acpi_video_bus_POST_info_fops
;
1188 entry
->data
= acpi_driver_data(device
);
1189 entry
->owner
= THIS_MODULE
;
1194 create_proc_entry("POST", S_IFREG
| S_IRUGO
| S_IRUSR
,
1195 acpi_device_dir(device
));
1199 acpi_video_bus_POST_fops
.write
= acpi_video_bus_write_POST
;
1200 entry
->proc_fops
= &acpi_video_bus_POST_fops
;
1201 entry
->data
= acpi_driver_data(device
);
1202 entry
->owner
= THIS_MODULE
;
1207 create_proc_entry("DOS", S_IFREG
| S_IRUGO
| S_IRUSR
,
1208 acpi_device_dir(device
));
1212 acpi_video_bus_DOS_fops
.write
= acpi_video_bus_write_DOS
;
1213 entry
->proc_fops
= &acpi_video_bus_DOS_fops
;
1214 entry
->data
= acpi_driver_data(device
);
1215 entry
->owner
= THIS_MODULE
;
1221 static int acpi_video_bus_remove_fs(struct acpi_device
*device
)
1223 struct acpi_video_bus
*video
;
1226 video
= acpi_driver_data(device
);
1228 if (acpi_device_dir(device
)) {
1229 remove_proc_entry("info", acpi_device_dir(device
));
1230 remove_proc_entry("ROM", acpi_device_dir(device
));
1231 remove_proc_entry("POST_info", acpi_device_dir(device
));
1232 remove_proc_entry("POST", acpi_device_dir(device
));
1233 remove_proc_entry("DOS", acpi_device_dir(device
));
1234 remove_proc_entry(acpi_device_bid(device
), acpi_video_dir
);
1235 acpi_device_dir(device
) = NULL
;
1241 /* --------------------------------------------------------------------------
1243 -------------------------------------------------------------------------- */
1245 /* device interface */
1248 acpi_video_bus_get_one_device(struct acpi_device
*device
,
1249 struct acpi_video_bus
*video
)
1251 unsigned long device_id
;
1253 struct acpi_video_device
*data
;
1256 if (!device
|| !video
)
1260 acpi_evaluate_integer(device
->handle
, "_ADR", NULL
, &device_id
);
1261 if (ACPI_SUCCESS(status
)) {
1263 data
= kmalloc(sizeof(struct acpi_video_device
), GFP_KERNEL
);
1267 memset(data
, 0, sizeof(struct acpi_video_device
));
1269 strcpy(acpi_device_name(device
), ACPI_VIDEO_DEVICE_NAME
);
1270 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
1271 acpi_driver_data(device
) = data
;
1273 data
->device_id
= device_id
;
1274 data
->video
= video
;
1277 switch (device_id
& 0xffff) {
1279 data
->flags
.crt
= 1;
1282 data
->flags
.lcd
= 1;
1285 data
->flags
.tvout
= 1;
1288 data
->flags
.unknown
= 1;
1292 acpi_video_device_bind(video
, data
);
1293 acpi_video_device_find_cap(data
);
1295 status
= acpi_install_notify_handler(device
->handle
,
1297 acpi_video_device_notify
,
1299 if (ACPI_FAILURE(status
)) {
1300 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
1301 "Error installing notify handler\n"));
1302 if(data
->brightness
)
1303 kfree(data
->brightness
->levels
);
1304 kfree(data
->brightness
);
1310 list_add_tail(&data
->entry
, &video
->video_device_list
);
1313 acpi_video_device_add_fs(device
);
1323 * video : video bus device
1328 * Enumerate the video device list of the video bus,
1329 * bind the ids with the corresponding video devices
1330 * under the video bus.
1333 static void acpi_video_device_rebind(struct acpi_video_bus
*video
)
1335 struct list_head
*node
, *next
;
1336 list_for_each_safe(node
, next
, &video
->video_device_list
) {
1337 struct acpi_video_device
*dev
=
1338 container_of(node
, struct acpi_video_device
, entry
);
1339 acpi_video_device_bind(video
, dev
);
1345 * video : video bus device
1346 * device : video output device under the video
1352 * Bind the ids with the corresponding video devices
1353 * under the video bus.
1357 acpi_video_device_bind(struct acpi_video_bus
*video
,
1358 struct acpi_video_device
*device
)
1362 #define IDS_VAL(i) video->attached_array[i].value.int_val
1363 #define IDS_BIND(i) video->attached_array[i].bind_info
1365 for (i
= 0; IDS_VAL(i
) != ACPI_VIDEO_HEAD_INVALID
&&
1366 i
< video
->attached_count
; i
++) {
1367 if (device
->device_id
== (IDS_VAL(i
) & 0xffff)) {
1368 IDS_BIND(i
) = device
;
1369 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "device_bind %d\n", i
));
1378 * video : video bus device
1383 * Call _DOD to enumerate all devices attached to display adapter
1387 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
)
1392 struct acpi_video_enumerated_device
*active_device_list
;
1393 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
1394 union acpi_object
*dod
= NULL
;
1395 union acpi_object
*obj
;
1397 status
= acpi_evaluate_object(video
->device
->handle
, "_DOD", NULL
, &buffer
);
1398 if (!ACPI_SUCCESS(status
)) {
1399 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _DOD"));
1403 dod
= buffer
.pointer
;
1404 if (!dod
|| (dod
->type
!= ACPI_TYPE_PACKAGE
)) {
1405 ACPI_EXCEPTION((AE_INFO
, status
, "Invalid _DOD data"));
1410 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Found %d video heads in _DOD\n",
1411 dod
->package
.count
));
1413 active_device_list
= kmalloc((1 +
1414 dod
->package
.count
) *
1416 acpi_video_enumerated_device
),
1419 if (!active_device_list
) {
1425 for (i
= 0; i
< dod
->package
.count
; i
++) {
1426 obj
= &dod
->package
.elements
[i
];
1428 if (obj
->type
!= ACPI_TYPE_INTEGER
) {
1429 printk(KERN_ERR PREFIX
"Invalid _DOD data\n");
1430 active_device_list
[i
].value
.int_val
=
1431 ACPI_VIDEO_HEAD_INVALID
;
1433 active_device_list
[i
].value
.int_val
= obj
->integer
.value
;
1434 active_device_list
[i
].bind_info
= NULL
;
1435 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "dod element[%d] = %d\n", i
,
1436 (int)obj
->integer
.value
));
1439 active_device_list
[count
].value
.int_val
= ACPI_VIDEO_HEAD_END
;
1441 kfree(video
->attached_array
);
1443 video
->attached_array
= active_device_list
;
1444 video
->attached_count
= count
;
1446 kfree(buffer
.pointer
);
1452 * video : video bus device
1453 * event : Nontify Event
1458 * 1. Find out the current active output device.
1459 * 2. Identify the next output device to switch
1460 * 3. call _DSS to do actual switch.
1463 static int acpi_video_switch_output(struct acpi_video_bus
*video
, int event
)
1465 struct list_head
*node
, *next
;
1466 struct acpi_video_device
*dev
= NULL
;
1467 struct acpi_video_device
*dev_next
= NULL
;
1468 struct acpi_video_device
*dev_prev
= NULL
;
1469 unsigned long state
;
1473 list_for_each_safe(node
, next
, &video
->video_device_list
) {
1474 dev
= container_of(node
, struct acpi_video_device
, entry
);
1475 status
= acpi_video_device_get_state(dev
, &state
);
1478 container_of(node
->next
, struct acpi_video_device
,
1481 container_of(node
->prev
, struct acpi_video_device
,
1486 dev_next
= container_of(node
->next
, struct acpi_video_device
, entry
);
1487 dev_prev
= container_of(node
->prev
, struct acpi_video_device
, entry
);
1490 case ACPI_VIDEO_NOTIFY_CYCLE
:
1491 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
:
1492 acpi_video_device_set_state(dev
, 0);
1493 acpi_video_device_set_state(dev_next
, 0x80000001);
1495 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT
:
1496 acpi_video_device_set_state(dev
, 0);
1497 acpi_video_device_set_state(dev_prev
, 0x80000001);
1506 acpi_video_get_next_level(struct acpi_video_device
*device
,
1507 u32 level_current
, u32 event
)
1509 int min
, max
, min_above
, max_below
, i
, l
;
1510 max
= max_below
= 0;
1511 min
= min_above
= 255;
1512 for (i
= 0; i
< device
->brightness
->count
; i
++) {
1513 l
= device
->brightness
->levels
[i
];
1518 if (l
< min_above
&& l
> level_current
)
1520 if (l
> max_below
&& l
< level_current
)
1525 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
:
1526 return (level_current
< max
) ? min_above
: min
;
1527 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
:
1528 return (level_current
< max
) ? min_above
: max
;
1529 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
:
1530 return (level_current
> min
) ? max_below
: min
;
1531 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
:
1532 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
:
1535 return level_current
;
1540 acpi_video_switch_brightness(struct acpi_video_device
*device
, int event
)
1542 unsigned long level_current
, level_next
;
1543 acpi_video_device_lcd_get_level_current(device
, &level_current
);
1544 level_next
= acpi_video_get_next_level(device
, level_current
, event
);
1545 acpi_video_device_lcd_set_level(device
, level_next
);
1549 acpi_video_bus_get_devices(struct acpi_video_bus
*video
,
1550 struct acpi_device
*device
)
1553 struct list_head
*node
, *next
;
1556 acpi_video_device_enumerate(video
);
1558 list_for_each_safe(node
, next
, &device
->children
) {
1559 struct acpi_device
*dev
=
1560 list_entry(node
, struct acpi_device
, node
);
1565 status
= acpi_video_bus_get_one_device(dev
, video
);
1566 if (ACPI_FAILURE(status
)) {
1567 ACPI_EXCEPTION((AE_INFO
, status
, "Cant attach device"));
1575 static int acpi_video_bus_put_one_device(struct acpi_video_device
*device
)
1578 struct acpi_video_bus
*video
;
1581 if (!device
|| !device
->video
)
1584 video
= device
->video
;
1587 list_del(&device
->entry
);
1589 acpi_video_device_remove_fs(device
->dev
);
1591 status
= acpi_remove_notify_handler(device
->dev
->handle
,
1593 acpi_video_device_notify
);
1598 static int acpi_video_bus_put_devices(struct acpi_video_bus
*video
)
1601 struct list_head
*node
, *next
;
1604 list_for_each_safe(node
, next
, &video
->video_device_list
) {
1605 struct acpi_video_device
*data
=
1606 list_entry(node
, struct acpi_video_device
, entry
);
1610 status
= acpi_video_bus_put_one_device(data
);
1611 if (ACPI_FAILURE(status
))
1612 printk(KERN_WARNING PREFIX
1613 "hhuuhhuu bug in acpi video driver.\n");
1615 if (data
->brightness
)
1616 kfree(data
->brightness
->levels
);
1617 kfree(data
->brightness
);
1624 /* acpi_video interface */
1626 static int acpi_video_bus_start_devices(struct acpi_video_bus
*video
)
1628 return acpi_video_bus_DOS(video
, 1, 0);
1631 static int acpi_video_bus_stop_devices(struct acpi_video_bus
*video
)
1633 return acpi_video_bus_DOS(video
, 0, 1);
1636 static void acpi_video_bus_notify(acpi_handle handle
, u32 event
, void *data
)
1638 struct acpi_video_bus
*video
= data
;
1639 struct acpi_device
*device
= NULL
;
1641 printk("video bus notify\n");
1646 device
= video
->device
;
1649 case ACPI_VIDEO_NOTIFY_SWITCH
: /* User request that a switch occur,
1650 * most likely via hotkey. */
1651 acpi_bus_generate_event(device
, event
, 0);
1654 case ACPI_VIDEO_NOTIFY_PROBE
: /* User plug or remove a video
1656 acpi_video_device_enumerate(video
);
1657 acpi_video_device_rebind(video
);
1658 acpi_video_switch_output(video
, event
);
1659 acpi_bus_generate_event(device
, event
, 0);
1662 case ACPI_VIDEO_NOTIFY_CYCLE
: /* Cycle Display output hotkey pressed. */
1663 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
: /* Next Display output hotkey pressed. */
1664 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT
: /* previous Display output hotkey pressed. */
1665 acpi_video_switch_output(video
, event
);
1666 acpi_bus_generate_event(device
, event
, 0);
1670 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
1671 "Unsupported event [0x%x]\n", event
));
1678 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
)
1680 struct acpi_video_device
*video_device
= data
;
1681 struct acpi_device
*device
= NULL
;
1684 printk("video device notify\n");
1688 device
= video_device
->dev
;
1691 case ACPI_VIDEO_NOTIFY_SWITCH
: /* change in status (cycle output device) */
1692 case ACPI_VIDEO_NOTIFY_PROBE
: /* change in status (output device status) */
1693 acpi_bus_generate_event(device
, event
, 0);
1695 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
: /* Cycle brightness */
1696 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
: /* Increase brightness */
1697 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
: /* Decrease brightness */
1698 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
: /* zero brightnesss */
1699 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
: /* display device off */
1700 acpi_video_switch_brightness(video_device
, event
);
1701 acpi_bus_generate_event(device
, event
, 0);
1704 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
1705 "Unsupported event [0x%x]\n", event
));
1711 static int acpi_video_bus_add(struct acpi_device
*device
)
1714 acpi_status status
= 0;
1715 struct acpi_video_bus
*video
= NULL
;
1721 video
= kmalloc(sizeof(struct acpi_video_bus
), GFP_KERNEL
);
1724 memset(video
, 0, sizeof(struct acpi_video_bus
));
1726 video
->device
= device
;
1727 strcpy(acpi_device_name(device
), ACPI_VIDEO_BUS_NAME
);
1728 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
1729 acpi_driver_data(device
) = video
;
1731 acpi_video_bus_find_cap(video
);
1732 result
= acpi_video_bus_check(video
);
1736 result
= acpi_video_bus_add_fs(device
);
1740 init_MUTEX(&video
->sem
);
1741 INIT_LIST_HEAD(&video
->video_device_list
);
1743 acpi_video_bus_get_devices(video
, device
);
1744 acpi_video_bus_start_devices(video
);
1746 status
= acpi_install_notify_handler(device
->handle
,
1748 acpi_video_bus_notify
, video
);
1749 if (ACPI_FAILURE(status
)) {
1750 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
1751 "Error installing notify handler\n"));
1752 acpi_video_bus_stop_devices(video
);
1753 acpi_video_bus_put_devices(video
);
1754 kfree(video
->attached_array
);
1755 acpi_video_bus_remove_fs(device
);
1760 printk(KERN_INFO PREFIX
"%s [%s] (multi-head: %s rom: %s post: %s)\n",
1761 ACPI_VIDEO_DEVICE_NAME
, acpi_device_bid(device
),
1762 video
->flags
.multihead
? "yes" : "no",
1763 video
->flags
.rom
? "yes" : "no",
1764 video
->flags
.post
? "yes" : "no");
1773 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
)
1775 acpi_status status
= 0;
1776 struct acpi_video_bus
*video
= NULL
;
1779 if (!device
|| !acpi_driver_data(device
))
1782 video
= acpi_driver_data(device
);
1784 acpi_video_bus_stop_devices(video
);
1786 status
= acpi_remove_notify_handler(video
->device
->handle
,
1788 acpi_video_bus_notify
);
1790 acpi_video_bus_put_devices(video
);
1791 acpi_video_bus_remove_fs(device
);
1793 kfree(video
->attached_array
);
1800 acpi_video_bus_match(struct acpi_device
*device
, struct acpi_driver
*driver
)
1802 acpi_handle h_dummy1
;
1803 acpi_handle h_dummy2
;
1804 acpi_handle h_dummy3
;
1807 if (!device
|| !driver
)
1810 /* Since there is no HID, CID for ACPI Video drivers, we have
1811 * to check well known required nodes for each feature we support.
1814 /* Does this device able to support video switching ? */
1815 if (ACPI_SUCCESS(acpi_get_handle(device
->handle
, "_DOD", &h_dummy1
)) &&
1816 ACPI_SUCCESS(acpi_get_handle(device
->handle
, "_DOS", &h_dummy2
)))
1819 /* Does this device able to retrieve a video ROM ? */
1820 if (ACPI_SUCCESS(acpi_get_handle(device
->handle
, "_ROM", &h_dummy1
)))
1823 /* Does this device able to configure which video head to be POSTed ? */
1824 if (ACPI_SUCCESS(acpi_get_handle(device
->handle
, "_VPO", &h_dummy1
)) &&
1825 ACPI_SUCCESS(acpi_get_handle(device
->handle
, "_GPD", &h_dummy2
)) &&
1826 ACPI_SUCCESS(acpi_get_handle(device
->handle
, "_SPD", &h_dummy3
)))
1832 static int __init
acpi_video_init(void)
1838 acpi_dbg_level = 0xFFFFFFFF;
1839 acpi_dbg_layer = 0x08000000;
1842 acpi_video_dir
= proc_mkdir(ACPI_VIDEO_CLASS
, acpi_root_dir
);
1843 if (!acpi_video_dir
)
1845 acpi_video_dir
->owner
= THIS_MODULE
;
1847 result
= acpi_bus_register_driver(&acpi_video_bus
);
1849 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
1856 static void __exit
acpi_video_exit(void)
1859 acpi_bus_unregister_driver(&acpi_video_bus
);
1861 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
1866 module_init(acpi_video_init
);
1867 module_exit(acpi_video_exit
);