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 <linux/video_output.h>
37 #include <asm/uaccess.h>
39 #include <acpi/acpi_bus.h>
40 #include <acpi/acpi_drivers.h>
42 #define ACPI_VIDEO_COMPONENT 0x08000000
43 #define ACPI_VIDEO_CLASS "video"
44 #define ACPI_VIDEO_BUS_NAME "Video Bus"
45 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
46 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
47 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
48 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
49 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
50 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
52 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
53 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
54 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
55 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
56 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
58 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
59 #define ACPI_VIDEO_HEAD_END (~0u)
60 #define MAX_NAME_LEN 20
62 #define ACPI_VIDEO_DISPLAY_CRT 1
63 #define ACPI_VIDEO_DISPLAY_TV 2
64 #define ACPI_VIDEO_DISPLAY_DVI 3
65 #define ACPI_VIDEO_DISPLAY_LCD 4
67 #define _COMPONENT ACPI_VIDEO_COMPONENT
68 ACPI_MODULE_NAME("video");
70 MODULE_AUTHOR("Bruno Ducrot");
71 MODULE_DESCRIPTION("ACPI Video Driver");
72 MODULE_LICENSE("GPL");
74 static int acpi_video_bus_add(struct acpi_device
*device
);
75 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
);
77 static struct acpi_driver acpi_video_bus
= {
79 .class = ACPI_VIDEO_CLASS
,
80 .ids
= ACPI_VIDEO_HID
,
82 .add
= acpi_video_bus_add
,
83 .remove
= acpi_video_bus_remove
,
87 struct acpi_video_bus_flags
{
88 u8 multihead
:1; /* can switch video heads */
89 u8 rom
:1; /* can retrieve a video rom */
90 u8 post
:1; /* can configure the head to */
94 struct acpi_video_bus_cap
{
95 u8 _DOS
:1; /*Enable/Disable output switching */
96 u8 _DOD
:1; /*Enumerate all devices attached to display adapter */
97 u8 _ROM
:1; /*Get ROM Data */
98 u8 _GPD
:1; /*Get POST Device */
99 u8 _SPD
:1; /*Set POST Device */
100 u8 _VPO
:1; /*Video POST Options */
104 struct acpi_video_device_attrib
{
105 u32 display_index
:4; /* A zero-based instance of the Display */
106 u32 display_port_attachment
:4; /*This field differentiates the display type */
107 u32 display_type
:4; /*Describe the specific type in use */
108 u32 vendor_specific
:4; /*Chipset Vendor Specific */
109 u32 bios_can_detect
:1; /*BIOS can detect the device */
110 u32 depend_on_vga
:1; /*Non-VGA output device whose power is related to
112 u32 pipe_id
:3; /*For VGA multiple-head devices. */
113 u32 reserved
:10; /*Must be 0 */
114 u32 device_id_scheme
:1; /*Device ID Scheme */
117 struct acpi_video_enumerated_device
{
120 struct acpi_video_device_attrib attrib
;
122 struct acpi_video_device
*bind_info
;
125 struct acpi_video_bus
{
126 struct acpi_device
*device
;
128 struct acpi_video_enumerated_device
*attached_array
;
130 struct acpi_video_bus_cap cap
;
131 struct acpi_video_bus_flags flags
;
132 struct semaphore sem
;
133 struct list_head video_device_list
;
134 struct proc_dir_entry
*dir
;
137 struct acpi_video_device_flags
{
147 struct acpi_video_device_cap
{
148 u8 _ADR
:1; /*Return the unique ID */
149 u8 _BCL
:1; /*Query list of brightness control levels supported */
150 u8 _BCM
:1; /*Set the brightness level */
151 u8 _BQC
:1; /* Get current brightness level */
152 u8 _DDC
:1; /*Return the EDID for this device */
153 u8 _DCS
:1; /*Return status of output device */
154 u8 _DGS
:1; /*Query graphics state */
155 u8 _DSS
:1; /*Device state set */
158 struct acpi_video_device_brightness
{
164 struct acpi_video_device
{
165 unsigned long device_id
;
166 struct acpi_video_device_flags flags
;
167 struct acpi_video_device_cap cap
;
168 struct list_head entry
;
169 struct acpi_video_bus
*video
;
170 struct acpi_device
*dev
;
171 struct acpi_video_device_brightness
*brightness
;
172 struct backlight_device
*backlight
;
173 struct output_device
*output_dev
;
177 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
);
178 static struct file_operations acpi_video_bus_info_fops
= {
179 .open
= acpi_video_bus_info_open_fs
,
182 .release
= single_release
,
185 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
);
186 static struct file_operations acpi_video_bus_ROM_fops
= {
187 .open
= acpi_video_bus_ROM_open_fs
,
190 .release
= single_release
,
193 static int acpi_video_bus_POST_info_open_fs(struct inode
*inode
,
195 static struct file_operations acpi_video_bus_POST_info_fops
= {
196 .open
= acpi_video_bus_POST_info_open_fs
,
199 .release
= single_release
,
202 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
);
203 static struct file_operations acpi_video_bus_POST_fops
= {
204 .open
= acpi_video_bus_POST_open_fs
,
207 .release
= single_release
,
210 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
);
211 static struct file_operations acpi_video_bus_DOS_fops
= {
212 .open
= acpi_video_bus_DOS_open_fs
,
215 .release
= single_release
,
219 static int acpi_video_device_info_open_fs(struct inode
*inode
,
221 static struct file_operations acpi_video_device_info_fops
= {
222 .open
= acpi_video_device_info_open_fs
,
225 .release
= single_release
,
228 static int acpi_video_device_state_open_fs(struct inode
*inode
,
230 static struct file_operations acpi_video_device_state_fops
= {
231 .open
= acpi_video_device_state_open_fs
,
234 .release
= single_release
,
237 static int acpi_video_device_brightness_open_fs(struct inode
*inode
,
239 static struct file_operations acpi_video_device_brightness_fops
= {
240 .open
= acpi_video_device_brightness_open_fs
,
243 .release
= single_release
,
246 static int acpi_video_device_EDID_open_fs(struct inode
*inode
,
248 static struct file_operations acpi_video_device_EDID_fops
= {
249 .open
= acpi_video_device_EDID_open_fs
,
252 .release
= single_release
,
255 static char device_decode
[][30] = {
256 "motherboard VGA device",
262 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
);
263 static void acpi_video_device_rebind(struct acpi_video_bus
*video
);
264 static void acpi_video_device_bind(struct acpi_video_bus
*video
,
265 struct acpi_video_device
*device
);
266 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
);
267 static int acpi_video_switch_output(struct acpi_video_bus
*video
, int event
);
268 static int acpi_video_device_lcd_set_level(struct acpi_video_device
*device
,
270 static int acpi_video_device_lcd_get_level_current(
271 struct acpi_video_device
*device
,
272 unsigned long *level
);
273 static int acpi_video_get_next_level(struct acpi_video_device
*device
,
274 u32 level_current
, u32 event
);
275 static void acpi_video_switch_brightness(struct acpi_video_device
*device
,
277 static int acpi_video_device_get_state(struct acpi_video_device
*device
,
278 unsigned long *state
);
279 static int acpi_video_output_get(struct output_device
*od
);
280 static int acpi_video_device_set_state(struct acpi_video_device
*device
, int state
);
282 /*backlight device sysfs support*/
283 static int acpi_video_get_brightness(struct backlight_device
*bd
)
285 unsigned long cur_level
;
286 struct acpi_video_device
*vd
=
287 (struct acpi_video_device
*)class_get_devdata(&bd
->class_dev
);
288 acpi_video_device_lcd_get_level_current(vd
, &cur_level
);
289 return (int) cur_level
;
292 static int acpi_video_set_brightness(struct backlight_device
*bd
)
294 int request_level
= bd
->props
.brightness
;
295 struct acpi_video_device
*vd
=
296 (struct acpi_video_device
*)class_get_devdata(&bd
->class_dev
);
297 acpi_video_device_lcd_set_level(vd
, request_level
);
301 static struct backlight_ops acpi_backlight_ops
= {
302 .get_brightness
= acpi_video_get_brightness
,
303 .update_status
= acpi_video_set_brightness
,
306 /*video output device sysfs support*/
307 static int acpi_video_output_get(struct output_device
*od
)
310 struct acpi_video_device
*vd
=
311 (struct acpi_video_device
*)class_get_devdata(&od
->class_dev
);
312 acpi_video_device_get_state(vd
, &state
);
316 static int acpi_video_output_set(struct output_device
*od
)
318 unsigned long state
= od
->request_state
;
319 struct acpi_video_device
*vd
=
320 (struct acpi_video_device
*)class_get_devdata(&od
->class_dev
);
321 return acpi_video_device_set_state(vd
, state
);
324 static struct output_properties acpi_output_properties
= {
325 .set_state
= acpi_video_output_set
,
326 .get_status
= acpi_video_output_get
,
328 /* --------------------------------------------------------------------------
330 -------------------------------------------------------------------------- */
335 acpi_video_device_query(struct acpi_video_device
*device
, unsigned long *state
)
339 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DGS", NULL
, state
);
345 acpi_video_device_get_state(struct acpi_video_device
*device
,
346 unsigned long *state
)
350 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DCS", NULL
, state
);
356 acpi_video_device_set_state(struct acpi_video_device
*device
, int state
)
359 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
360 struct acpi_object_list args
= { 1, &arg0
};
364 arg0
.integer
.value
= state
;
365 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DSS", &args
, &ret
);
371 acpi_video_device_lcd_query_levels(struct acpi_video_device
*device
,
372 union acpi_object
**levels
)
375 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
376 union acpi_object
*obj
;
381 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCL", NULL
, &buffer
);
382 if (!ACPI_SUCCESS(status
))
384 obj
= (union acpi_object
*)buffer
.pointer
;
385 if (!obj
|| (obj
->type
!= ACPI_TYPE_PACKAGE
)) {
386 printk(KERN_ERR PREFIX
"Invalid _BCL data\n");
396 kfree(buffer
.pointer
);
402 acpi_video_device_lcd_set_level(struct acpi_video_device
*device
, int level
)
405 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
406 struct acpi_object_list args
= { 1, &arg0
};
409 arg0
.integer
.value
= level
;
410 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCM", &args
, NULL
);
412 printk(KERN_DEBUG
"set_level status: %x\n", status
);
417 acpi_video_device_lcd_get_level_current(struct acpi_video_device
*device
,
418 unsigned long *level
)
422 status
= acpi_evaluate_integer(device
->dev
->handle
, "_BQC", NULL
, level
);
428 acpi_video_device_EDID(struct acpi_video_device
*device
,
429 union acpi_object
**edid
, ssize_t length
)
432 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
433 union acpi_object
*obj
;
434 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
435 struct acpi_object_list args
= { 1, &arg0
};
443 arg0
.integer
.value
= 1;
444 else if (length
== 256)
445 arg0
.integer
.value
= 2;
449 status
= acpi_evaluate_object(device
->dev
->handle
, "_DDC", &args
, &buffer
);
450 if (ACPI_FAILURE(status
))
453 obj
= buffer
.pointer
;
455 if (obj
&& obj
->type
== ACPI_TYPE_BUFFER
)
458 printk(KERN_ERR PREFIX
"Invalid _DDC data\n");
469 acpi_video_bus_set_POST(struct acpi_video_bus
*video
, unsigned long option
)
473 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
474 struct acpi_object_list args
= { 1, &arg0
};
477 arg0
.integer
.value
= option
;
479 status
= acpi_evaluate_integer(video
->device
->handle
, "_SPD", &args
, &tmp
);
480 if (ACPI_SUCCESS(status
))
481 status
= tmp
? (-EINVAL
) : (AE_OK
);
487 acpi_video_bus_get_POST(struct acpi_video_bus
*video
, unsigned long *id
)
491 status
= acpi_evaluate_integer(video
->device
->handle
, "_GPD", NULL
, id
);
497 acpi_video_bus_POST_options(struct acpi_video_bus
*video
,
498 unsigned long *options
)
502 status
= acpi_evaluate_integer(video
->device
->handle
, "_VPO", NULL
, options
);
510 * video : video bus device pointer
512 * 0. The system BIOS should NOT automatically switch(toggle)
513 * the active display output.
514 * 1. The system BIOS should automatically switch (toggle) the
515 * active display output. No switch event.
516 * 2. The _DGS value should be locked.
517 * 3. The system BIOS should not automatically switch (toggle) the
518 * active display output, but instead generate the display switch
521 * 0. The system BIOS should automatically control the brightness level
522 * of the LCD when the power changes from AC to DC
523 * 1. The system BIOS should NOT automatically control the brightness
524 * level of the LCD when the power changes from AC to DC.
530 acpi_video_bus_DOS(struct acpi_video_bus
*video
, int bios_flag
, int lcd_flag
)
532 acpi_integer status
= 0;
533 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
534 struct acpi_object_list args
= { 1, &arg0
};
537 if (bios_flag
< 0 || bios_flag
> 3 || lcd_flag
< 0 || lcd_flag
> 1) {
541 arg0
.integer
.value
= (lcd_flag
<< 2) | bios_flag
;
542 video
->dos_setting
= arg0
.integer
.value
;
543 acpi_evaluate_object(video
->device
->handle
, "_DOS", &args
, NULL
);
551 * device : video output device (LCD, CRT, ..)
556 * Find out all required AML methods defined under the output
560 static void acpi_video_device_find_cap(struct acpi_video_device
*device
)
562 acpi_handle h_dummy1
;
565 union acpi_object
*obj
= NULL
;
566 struct acpi_video_device_brightness
*br
= NULL
;
569 memset(&device
->cap
, 0, 4);
571 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_ADR", &h_dummy1
))) {
572 device
->cap
._ADR
= 1;
574 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCL", &h_dummy1
))) {
575 device
->cap
._BCL
= 1;
577 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCM", &h_dummy1
))) {
578 device
->cap
._BCM
= 1;
580 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
,"_BQC",&h_dummy1
)))
581 device
->cap
._BQC
= 1;
582 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DDC", &h_dummy1
))) {
583 device
->cap
._DDC
= 1;
585 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DCS", &h_dummy1
))) {
586 device
->cap
._DCS
= 1;
588 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DGS", &h_dummy1
))) {
589 device
->cap
._DGS
= 1;
591 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DSS", &h_dummy1
))) {
592 device
->cap
._DSS
= 1;
595 if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device
, &obj
))) {
597 if (obj
->package
.count
>= 2) {
599 union acpi_object
*o
;
601 br
= kzalloc(sizeof(*br
), GFP_KERNEL
);
603 printk(KERN_ERR
"can't allocate memory\n");
605 br
->levels
= kmalloc(obj
->package
.count
*
606 sizeof *(br
->levels
), GFP_KERNEL
);
610 for (i
= 0; i
< obj
->package
.count
; i
++) {
611 o
= (union acpi_object
*)&obj
->package
.
613 if (o
->type
!= ACPI_TYPE_INTEGER
) {
614 printk(KERN_ERR PREFIX
"Invalid data\n");
617 br
->levels
[count
] = (u32
) o
->integer
.value
;
619 if (br
->levels
[count
] > max_level
)
620 max_level
= br
->levels
[count
];
629 device
->brightness
= br
;
630 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
631 "found %d brightness levels\n",
638 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Could not query available LCD brightness level\n"));
643 if (device
->cap
._BCL
&& device
->cap
._BCM
&& device
->cap
._BQC
&& max_level
> 0){
645 static int count
= 0;
647 name
= kzalloc(MAX_NAME_LEN
, GFP_KERNEL
);
651 sprintf(name
, "acpi_video%d", count
++);
652 acpi_video_device_lcd_get_level_current(device
, &tmp
);
653 device
->backlight
= backlight_device_register(name
,
654 NULL
, device
, &acpi_backlight_ops
);
655 device
->backlight
->props
.max_brightness
= max_level
;
656 device
->backlight
->props
.brightness
= (int)tmp
;
657 backlight_update_status(device
->backlight
);
661 if (device
->cap
._DCS
&& device
->cap
._DSS
){
662 static int count
= 0;
664 name
= kzalloc(MAX_NAME_LEN
, GFP_KERNEL
);
667 sprintf(name
, "acpi_video%d", count
++);
668 device
->output_dev
= video_output_register(name
,
669 NULL
, device
, &acpi_output_properties
);
677 * device : video output device (VGA)
682 * Find out all required AML methods defined under the video bus device.
685 static void acpi_video_bus_find_cap(struct acpi_video_bus
*video
)
687 acpi_handle h_dummy1
;
689 memset(&video
->cap
, 0, 4);
690 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOS", &h_dummy1
))) {
693 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOD", &h_dummy1
))) {
696 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_ROM", &h_dummy1
))) {
699 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_GPD", &h_dummy1
))) {
702 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_SPD", &h_dummy1
))) {
705 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_VPO", &h_dummy1
))) {
711 * Check whether the video bus device has required AML method to
712 * support the desired features
715 static int acpi_video_bus_check(struct acpi_video_bus
*video
)
717 acpi_status status
= -ENOENT
;
723 /* Since there is no HID, CID and so on for VGA driver, we have
724 * to check well known required nodes.
727 /* Does this device support video switching? */
728 if (video
->cap
._DOS
) {
729 video
->flags
.multihead
= 1;
733 /* Does this device support retrieving a video ROM? */
734 if (video
->cap
._ROM
) {
735 video
->flags
.rom
= 1;
739 /* Does this device support configuring which video device to POST? */
740 if (video
->cap
._GPD
&& video
->cap
._SPD
&& video
->cap
._VPO
) {
741 video
->flags
.post
= 1;
748 /* --------------------------------------------------------------------------
750 -------------------------------------------------------------------------- */
752 static struct proc_dir_entry
*acpi_video_dir
;
756 static int acpi_video_device_info_seq_show(struct seq_file
*seq
, void *offset
)
758 struct acpi_video_device
*dev
= seq
->private;
764 seq_printf(seq
, "device_id: 0x%04x\n", (u32
) dev
->device_id
);
765 seq_printf(seq
, "type: ");
767 seq_printf(seq
, "CRT\n");
768 else if (dev
->flags
.lcd
)
769 seq_printf(seq
, "LCD\n");
770 else if (dev
->flags
.tvout
)
771 seq_printf(seq
, "TVOUT\n");
772 else if (dev
->flags
.dvi
)
773 seq_printf(seq
, "DVI\n");
775 seq_printf(seq
, "UNKNOWN\n");
777 seq_printf(seq
, "known by bios: %s\n", dev
->flags
.bios
? "yes" : "no");
784 acpi_video_device_info_open_fs(struct inode
*inode
, struct file
*file
)
786 return single_open(file
, acpi_video_device_info_seq_show
,
790 static int acpi_video_device_state_seq_show(struct seq_file
*seq
, void *offset
)
793 struct acpi_video_device
*dev
= seq
->private;
800 status
= acpi_video_device_get_state(dev
, &state
);
801 seq_printf(seq
, "state: ");
802 if (ACPI_SUCCESS(status
))
803 seq_printf(seq
, "0x%02lx\n", state
);
805 seq_printf(seq
, "<not supported>\n");
807 status
= acpi_video_device_query(dev
, &state
);
808 seq_printf(seq
, "query: ");
809 if (ACPI_SUCCESS(status
))
810 seq_printf(seq
, "0x%02lx\n", state
);
812 seq_printf(seq
, "<not supported>\n");
819 acpi_video_device_state_open_fs(struct inode
*inode
, struct file
*file
)
821 return single_open(file
, acpi_video_device_state_seq_show
,
826 acpi_video_device_write_state(struct file
*file
,
827 const char __user
* buffer
,
828 size_t count
, loff_t
* data
)
831 struct seq_file
*m
= file
->private_data
;
832 struct acpi_video_device
*dev
= m
->private;
833 char str
[12] = { 0 };
837 if (!dev
|| count
+ 1 > sizeof str
)
840 if (copy_from_user(str
, buffer
, count
))
844 state
= simple_strtoul(str
, NULL
, 0);
845 state
&= ((1ul << 31) | (1ul << 30) | (1ul << 0));
847 status
= acpi_video_device_set_state(dev
, state
);
856 acpi_video_device_brightness_seq_show(struct seq_file
*seq
, void *offset
)
858 struct acpi_video_device
*dev
= seq
->private;
862 if (!dev
|| !dev
->brightness
) {
863 seq_printf(seq
, "<not supported>\n");
867 seq_printf(seq
, "levels: ");
868 for (i
= 0; i
< dev
->brightness
->count
; i
++)
869 seq_printf(seq
, " %d", dev
->brightness
->levels
[i
]);
870 seq_printf(seq
, "\ncurrent: %d\n", dev
->brightness
->curr
);
876 acpi_video_device_brightness_open_fs(struct inode
*inode
, struct file
*file
)
878 return single_open(file
, acpi_video_device_brightness_seq_show
,
883 acpi_video_device_write_brightness(struct file
*file
,
884 const char __user
* buffer
,
885 size_t count
, loff_t
* data
)
887 struct seq_file
*m
= file
->private_data
;
888 struct acpi_video_device
*dev
= m
->private;
890 unsigned int level
= 0;
894 if (!dev
|| !dev
->brightness
|| count
+ 1 > sizeof str
)
897 if (copy_from_user(str
, buffer
, count
))
901 level
= simple_strtoul(str
, NULL
, 0);
906 /* validate through the list of available levels */
907 for (i
= 0; i
< dev
->brightness
->count
; i
++)
908 if (level
== dev
->brightness
->levels
[i
]) {
910 (acpi_video_device_lcd_set_level(dev
, level
)))
911 dev
->brightness
->curr
= level
;
918 static int acpi_video_device_EDID_seq_show(struct seq_file
*seq
, void *offset
)
920 struct acpi_video_device
*dev
= seq
->private;
923 union acpi_object
*edid
= NULL
;
929 status
= acpi_video_device_EDID(dev
, &edid
, 128);
930 if (ACPI_FAILURE(status
)) {
931 status
= acpi_video_device_EDID(dev
, &edid
, 256);
934 if (ACPI_FAILURE(status
)) {
938 if (edid
&& edid
->type
== ACPI_TYPE_BUFFER
) {
939 for (i
= 0; i
< edid
->buffer
.length
; i
++)
940 seq_putc(seq
, edid
->buffer
.pointer
[i
]);
945 seq_printf(seq
, "<not supported>\n");
953 acpi_video_device_EDID_open_fs(struct inode
*inode
, struct file
*file
)
955 return single_open(file
, acpi_video_device_EDID_seq_show
,
959 static int acpi_video_device_add_fs(struct acpi_device
*device
)
961 struct proc_dir_entry
*entry
= NULL
;
962 struct acpi_video_device
*vid_dev
;
968 vid_dev
= acpi_driver_data(device
);
972 if (!acpi_device_dir(device
)) {
973 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
),
974 vid_dev
->video
->dir
);
975 if (!acpi_device_dir(device
))
977 acpi_device_dir(device
)->owner
= THIS_MODULE
;
981 entry
= create_proc_entry("info", S_IRUGO
, acpi_device_dir(device
));
985 entry
->proc_fops
= &acpi_video_device_info_fops
;
986 entry
->data
= acpi_driver_data(device
);
987 entry
->owner
= THIS_MODULE
;
992 create_proc_entry("state", S_IFREG
| S_IRUGO
| S_IWUSR
,
993 acpi_device_dir(device
));
997 acpi_video_device_state_fops
.write
= acpi_video_device_write_state
;
998 entry
->proc_fops
= &acpi_video_device_state_fops
;
999 entry
->data
= acpi_driver_data(device
);
1000 entry
->owner
= THIS_MODULE
;
1003 /* 'brightness' [R/W] */
1005 create_proc_entry("brightness", S_IFREG
| S_IRUGO
| S_IWUSR
,
1006 acpi_device_dir(device
));
1010 acpi_video_device_brightness_fops
.write
= acpi_video_device_write_brightness
;
1011 entry
->proc_fops
= &acpi_video_device_brightness_fops
;
1012 entry
->data
= acpi_driver_data(device
);
1013 entry
->owner
= THIS_MODULE
;
1017 entry
= create_proc_entry("EDID", S_IRUGO
, acpi_device_dir(device
));
1021 entry
->proc_fops
= &acpi_video_device_EDID_fops
;
1022 entry
->data
= acpi_driver_data(device
);
1023 entry
->owner
= THIS_MODULE
;
1029 static int acpi_video_device_remove_fs(struct acpi_device
*device
)
1031 struct acpi_video_device
*vid_dev
;
1033 vid_dev
= acpi_driver_data(device
);
1034 if (!vid_dev
|| !vid_dev
->video
|| !vid_dev
->video
->dir
)
1037 if (acpi_device_dir(device
)) {
1038 remove_proc_entry("info", acpi_device_dir(device
));
1039 remove_proc_entry("state", acpi_device_dir(device
));
1040 remove_proc_entry("brightness", acpi_device_dir(device
));
1041 remove_proc_entry("EDID", acpi_device_dir(device
));
1042 remove_proc_entry(acpi_device_bid(device
), vid_dev
->video
->dir
);
1043 acpi_device_dir(device
) = NULL
;
1050 static int acpi_video_bus_info_seq_show(struct seq_file
*seq
, void *offset
)
1052 struct acpi_video_bus
*video
= seq
->private;
1058 seq_printf(seq
, "Switching heads: %s\n",
1059 video
->flags
.multihead
? "yes" : "no");
1060 seq_printf(seq
, "Video ROM: %s\n",
1061 video
->flags
.rom
? "yes" : "no");
1062 seq_printf(seq
, "Device to be POSTed on boot: %s\n",
1063 video
->flags
.post
? "yes" : "no");
1069 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
)
1071 return single_open(file
, acpi_video_bus_info_seq_show
,
1075 static int acpi_video_bus_ROM_seq_show(struct seq_file
*seq
, void *offset
)
1077 struct acpi_video_bus
*video
= seq
->private;
1083 printk(KERN_INFO PREFIX
"Please implement %s\n", __FUNCTION__
);
1084 seq_printf(seq
, "<TODO>\n");
1090 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
)
1092 return single_open(file
, acpi_video_bus_ROM_seq_show
, PDE(inode
)->data
);
1095 static int acpi_video_bus_POST_info_seq_show(struct seq_file
*seq
, void *offset
)
1097 struct acpi_video_bus
*video
= seq
->private;
1098 unsigned long options
;
1105 status
= acpi_video_bus_POST_options(video
, &options
);
1106 if (ACPI_SUCCESS(status
)) {
1107 if (!(options
& 1)) {
1108 printk(KERN_WARNING PREFIX
1109 "The motherboard VGA device is not listed as a possible POST device.\n");
1110 printk(KERN_WARNING PREFIX
1111 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1113 printk("%lx\n", options
);
1114 seq_printf(seq
, "can POST: <integrated video>");
1116 seq_printf(seq
, " <PCI video>");
1118 seq_printf(seq
, " <AGP video>");
1119 seq_putc(seq
, '\n');
1121 seq_printf(seq
, "<not supported>\n");
1127 acpi_video_bus_POST_info_open_fs(struct inode
*inode
, struct file
*file
)
1129 return single_open(file
, acpi_video_bus_POST_info_seq_show
,
1133 static int acpi_video_bus_POST_seq_show(struct seq_file
*seq
, void *offset
)
1135 struct acpi_video_bus
*video
= seq
->private;
1143 status
= acpi_video_bus_get_POST(video
, &id
);
1144 if (!ACPI_SUCCESS(status
)) {
1145 seq_printf(seq
, "<not supported>\n");
1148 seq_printf(seq
, "device POSTed is <%s>\n", device_decode
[id
& 3]);
1154 static int acpi_video_bus_DOS_seq_show(struct seq_file
*seq
, void *offset
)
1156 struct acpi_video_bus
*video
= seq
->private;
1159 seq_printf(seq
, "DOS setting: <%d>\n", video
->dos_setting
);
1164 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
)
1166 return single_open(file
, acpi_video_bus_POST_seq_show
,
1170 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
)
1172 return single_open(file
, acpi_video_bus_DOS_seq_show
, PDE(inode
)->data
);
1176 acpi_video_bus_write_POST(struct file
*file
,
1177 const char __user
* buffer
,
1178 size_t count
, loff_t
* data
)
1181 struct seq_file
*m
= file
->private_data
;
1182 struct acpi_video_bus
*video
= m
->private;
1183 char str
[12] = { 0 };
1184 unsigned long opt
, options
;
1187 if (!video
|| count
+ 1 > sizeof str
)
1190 status
= acpi_video_bus_POST_options(video
, &options
);
1191 if (!ACPI_SUCCESS(status
))
1194 if (copy_from_user(str
, buffer
, count
))
1198 opt
= strtoul(str
, NULL
, 0);
1202 /* just in case an OEM 'forgot' the motherboard... */
1205 if (options
& (1ul << opt
)) {
1206 status
= acpi_video_bus_set_POST(video
, opt
);
1207 if (!ACPI_SUCCESS(status
))
1216 acpi_video_bus_write_DOS(struct file
*file
,
1217 const char __user
* buffer
,
1218 size_t count
, loff_t
* data
)
1221 struct seq_file
*m
= file
->private_data
;
1222 struct acpi_video_bus
*video
= m
->private;
1223 char str
[12] = { 0 };
1227 if (!video
|| count
+ 1 > sizeof str
)
1230 if (copy_from_user(str
, buffer
, count
))
1234 opt
= strtoul(str
, NULL
, 0);
1238 status
= acpi_video_bus_DOS(video
, opt
& 0x3, (opt
& 0x4) >> 2);
1240 if (!ACPI_SUCCESS(status
))
1246 static int acpi_video_bus_add_fs(struct acpi_device
*device
)
1248 struct proc_dir_entry
*entry
= NULL
;
1249 struct acpi_video_bus
*video
;
1252 video
= acpi_driver_data(device
);
1254 if (!acpi_device_dir(device
)) {
1255 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
),
1257 if (!acpi_device_dir(device
))
1259 video
->dir
= acpi_device_dir(device
);
1260 acpi_device_dir(device
)->owner
= THIS_MODULE
;
1264 entry
= create_proc_entry("info", S_IRUGO
, acpi_device_dir(device
));
1268 entry
->proc_fops
= &acpi_video_bus_info_fops
;
1269 entry
->data
= acpi_driver_data(device
);
1270 entry
->owner
= THIS_MODULE
;
1274 entry
= create_proc_entry("ROM", S_IRUGO
, acpi_device_dir(device
));
1278 entry
->proc_fops
= &acpi_video_bus_ROM_fops
;
1279 entry
->data
= acpi_driver_data(device
);
1280 entry
->owner
= THIS_MODULE
;
1283 /* 'POST_info' [R] */
1285 create_proc_entry("POST_info", S_IRUGO
, acpi_device_dir(device
));
1289 entry
->proc_fops
= &acpi_video_bus_POST_info_fops
;
1290 entry
->data
= acpi_driver_data(device
);
1291 entry
->owner
= THIS_MODULE
;
1296 create_proc_entry("POST", S_IFREG
| S_IRUGO
| S_IRUSR
,
1297 acpi_device_dir(device
));
1301 acpi_video_bus_POST_fops
.write
= acpi_video_bus_write_POST
;
1302 entry
->proc_fops
= &acpi_video_bus_POST_fops
;
1303 entry
->data
= acpi_driver_data(device
);
1304 entry
->owner
= THIS_MODULE
;
1309 create_proc_entry("DOS", S_IFREG
| S_IRUGO
| S_IRUSR
,
1310 acpi_device_dir(device
));
1314 acpi_video_bus_DOS_fops
.write
= acpi_video_bus_write_DOS
;
1315 entry
->proc_fops
= &acpi_video_bus_DOS_fops
;
1316 entry
->data
= acpi_driver_data(device
);
1317 entry
->owner
= THIS_MODULE
;
1323 static int acpi_video_bus_remove_fs(struct acpi_device
*device
)
1325 struct acpi_video_bus
*video
;
1328 video
= acpi_driver_data(device
);
1330 if (acpi_device_dir(device
)) {
1331 remove_proc_entry("info", acpi_device_dir(device
));
1332 remove_proc_entry("ROM", acpi_device_dir(device
));
1333 remove_proc_entry("POST_info", acpi_device_dir(device
));
1334 remove_proc_entry("POST", acpi_device_dir(device
));
1335 remove_proc_entry("DOS", acpi_device_dir(device
));
1336 remove_proc_entry(acpi_device_bid(device
), acpi_video_dir
);
1337 acpi_device_dir(device
) = NULL
;
1343 /* --------------------------------------------------------------------------
1345 -------------------------------------------------------------------------- */
1347 /* device interface */
1348 static struct acpi_video_device_attrib
*
1349 acpi_video_get_device_attr(struct acpi_video_bus
*video
, unsigned long device_id
)
1353 for(count
= 0; count
< video
->attached_count
; count
++)
1354 if((video
->attached_array
[count
].value
.int_val
& 0xffff) == device_id
)
1355 return &(video
->attached_array
[count
].value
.attrib
);
1360 acpi_video_bus_get_one_device(struct acpi_device
*device
,
1361 struct acpi_video_bus
*video
)
1363 unsigned long device_id
;
1365 struct acpi_video_device
*data
;
1366 struct acpi_video_device_attrib
* attribute
;
1368 if (!device
|| !video
)
1372 acpi_evaluate_integer(device
->handle
, "_ADR", NULL
, &device_id
);
1373 if (ACPI_SUCCESS(status
)) {
1375 data
= kzalloc(sizeof(struct acpi_video_device
), GFP_KERNEL
);
1379 strcpy(acpi_device_name(device
), ACPI_VIDEO_DEVICE_NAME
);
1380 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
1381 acpi_driver_data(device
) = data
;
1383 data
->device_id
= device_id
;
1384 data
->video
= video
;
1387 attribute
= acpi_video_get_device_attr(video
, device_id
);
1389 if((attribute
!= NULL
) && attribute
->device_id_scheme
) {
1390 switch (attribute
->display_type
) {
1391 case ACPI_VIDEO_DISPLAY_CRT
:
1392 data
->flags
.crt
= 1;
1394 case ACPI_VIDEO_DISPLAY_TV
:
1395 data
->flags
.tvout
= 1;
1397 case ACPI_VIDEO_DISPLAY_DVI
:
1398 data
->flags
.dvi
= 1;
1400 case ACPI_VIDEO_DISPLAY_LCD
:
1401 data
->flags
.lcd
= 1;
1404 data
->flags
.unknown
= 1;
1407 if(attribute
->bios_can_detect
)
1408 data
->flags
.bios
= 1;
1410 data
->flags
.unknown
= 1;
1412 acpi_video_device_bind(video
, data
);
1413 acpi_video_device_find_cap(data
);
1415 status
= acpi_install_notify_handler(device
->handle
,
1417 acpi_video_device_notify
,
1419 if (ACPI_FAILURE(status
)) {
1420 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
1421 "Error installing notify handler\n"));
1422 if(data
->brightness
)
1423 kfree(data
->brightness
->levels
);
1424 kfree(data
->brightness
);
1430 list_add_tail(&data
->entry
, &video
->video_device_list
);
1433 acpi_video_device_add_fs(device
);
1443 * video : video bus device
1448 * Enumerate the video device list of the video bus,
1449 * bind the ids with the corresponding video devices
1450 * under the video bus.
1453 static void acpi_video_device_rebind(struct acpi_video_bus
*video
)
1455 struct list_head
*node
, *next
;
1456 list_for_each_safe(node
, next
, &video
->video_device_list
) {
1457 struct acpi_video_device
*dev
=
1458 container_of(node
, struct acpi_video_device
, entry
);
1459 acpi_video_device_bind(video
, dev
);
1465 * video : video bus device
1466 * device : video output device under the video
1472 * Bind the ids with the corresponding video devices
1473 * under the video bus.
1477 acpi_video_device_bind(struct acpi_video_bus
*video
,
1478 struct acpi_video_device
*device
)
1482 #define IDS_VAL(i) video->attached_array[i].value.int_val
1483 #define IDS_BIND(i) video->attached_array[i].bind_info
1485 for (i
= 0; IDS_VAL(i
) != ACPI_VIDEO_HEAD_INVALID
&&
1486 i
< video
->attached_count
; i
++) {
1487 if (device
->device_id
== (IDS_VAL(i
) & 0xffff)) {
1488 IDS_BIND(i
) = device
;
1489 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "device_bind %d\n", i
));
1498 * video : video bus device
1503 * Call _DOD to enumerate all devices attached to display adapter
1507 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
)
1512 struct acpi_video_enumerated_device
*active_device_list
;
1513 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
1514 union acpi_object
*dod
= NULL
;
1515 union acpi_object
*obj
;
1517 status
= acpi_evaluate_object(video
->device
->handle
, "_DOD", NULL
, &buffer
);
1518 if (!ACPI_SUCCESS(status
)) {
1519 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _DOD"));
1523 dod
= buffer
.pointer
;
1524 if (!dod
|| (dod
->type
!= ACPI_TYPE_PACKAGE
)) {
1525 ACPI_EXCEPTION((AE_INFO
, status
, "Invalid _DOD data"));
1530 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Found %d video heads in _DOD\n",
1531 dod
->package
.count
));
1533 active_device_list
= kmalloc((1 +
1534 dod
->package
.count
) *
1536 acpi_video_enumerated_device
),
1539 if (!active_device_list
) {
1545 for (i
= 0; i
< dod
->package
.count
; i
++) {
1546 obj
= &dod
->package
.elements
[i
];
1548 if (obj
->type
!= ACPI_TYPE_INTEGER
) {
1549 printk(KERN_ERR PREFIX
"Invalid _DOD data\n");
1550 active_device_list
[i
].value
.int_val
=
1551 ACPI_VIDEO_HEAD_INVALID
;
1553 active_device_list
[i
].value
.int_val
= obj
->integer
.value
;
1554 active_device_list
[i
].bind_info
= NULL
;
1555 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "dod element[%d] = %d\n", i
,
1556 (int)obj
->integer
.value
));
1559 active_device_list
[count
].value
.int_val
= ACPI_VIDEO_HEAD_END
;
1561 kfree(video
->attached_array
);
1563 video
->attached_array
= active_device_list
;
1564 video
->attached_count
= count
;
1566 kfree(buffer
.pointer
);
1572 * video : video bus device
1573 * event : notify event
1578 * 1. Find out the current active output device.
1579 * 2. Identify the next output device to switch to.
1580 * 3. call _DSS to do actual switch.
1583 static int acpi_video_switch_output(struct acpi_video_bus
*video
, int event
)
1585 struct list_head
*node
, *next
;
1586 struct acpi_video_device
*dev
= NULL
;
1587 struct acpi_video_device
*dev_next
= NULL
;
1588 struct acpi_video_device
*dev_prev
= NULL
;
1589 unsigned long state
;
1593 list_for_each_safe(node
, next
, &video
->video_device_list
) {
1594 dev
= container_of(node
, struct acpi_video_device
, entry
);
1595 status
= acpi_video_device_get_state(dev
, &state
);
1598 container_of(node
->next
, struct acpi_video_device
,
1601 container_of(node
->prev
, struct acpi_video_device
,
1606 dev_next
= container_of(node
->next
, struct acpi_video_device
, entry
);
1607 dev_prev
= container_of(node
->prev
, struct acpi_video_device
, entry
);
1610 case ACPI_VIDEO_NOTIFY_CYCLE
:
1611 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
:
1612 acpi_video_device_set_state(dev
, 0);
1613 acpi_video_device_set_state(dev_next
, 0x80000001);
1615 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT
:
1616 acpi_video_device_set_state(dev
, 0);
1617 acpi_video_device_set_state(dev_prev
, 0x80000001);
1626 acpi_video_get_next_level(struct acpi_video_device
*device
,
1627 u32 level_current
, u32 event
)
1629 int min
, max
, min_above
, max_below
, i
, l
;
1630 max
= max_below
= 0;
1631 min
= min_above
= 255;
1632 for (i
= 0; i
< device
->brightness
->count
; i
++) {
1633 l
= device
->brightness
->levels
[i
];
1638 if (l
< min_above
&& l
> level_current
)
1640 if (l
> max_below
&& l
< level_current
)
1645 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
:
1646 return (level_current
< max
) ? min_above
: min
;
1647 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
:
1648 return (level_current
< max
) ? min_above
: max
;
1649 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
:
1650 return (level_current
> min
) ? max_below
: min
;
1651 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
:
1652 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
:
1655 return level_current
;
1660 acpi_video_switch_brightness(struct acpi_video_device
*device
, int event
)
1662 unsigned long level_current
, level_next
;
1663 acpi_video_device_lcd_get_level_current(device
, &level_current
);
1664 level_next
= acpi_video_get_next_level(device
, level_current
, event
);
1665 acpi_video_device_lcd_set_level(device
, level_next
);
1669 acpi_video_bus_get_devices(struct acpi_video_bus
*video
,
1670 struct acpi_device
*device
)
1673 struct list_head
*node
, *next
;
1676 acpi_video_device_enumerate(video
);
1678 list_for_each_safe(node
, next
, &device
->children
) {
1679 struct acpi_device
*dev
=
1680 list_entry(node
, struct acpi_device
, node
);
1685 status
= acpi_video_bus_get_one_device(dev
, video
);
1686 if (ACPI_FAILURE(status
)) {
1687 ACPI_EXCEPTION((AE_INFO
, status
, "Cant attach device"));
1695 static int acpi_video_bus_put_one_device(struct acpi_video_device
*device
)
1698 struct acpi_video_bus
*video
;
1701 if (!device
|| !device
->video
)
1704 video
= device
->video
;
1707 list_del(&device
->entry
);
1709 acpi_video_device_remove_fs(device
->dev
);
1711 status
= acpi_remove_notify_handler(device
->dev
->handle
,
1713 acpi_video_device_notify
);
1714 backlight_device_unregister(device
->backlight
);
1715 video_output_unregister(device
->output_dev
);
1719 static int acpi_video_bus_put_devices(struct acpi_video_bus
*video
)
1722 struct list_head
*node
, *next
;
1725 list_for_each_safe(node
, next
, &video
->video_device_list
) {
1726 struct acpi_video_device
*data
=
1727 list_entry(node
, struct acpi_video_device
, entry
);
1731 status
= acpi_video_bus_put_one_device(data
);
1732 if (ACPI_FAILURE(status
))
1733 printk(KERN_WARNING PREFIX
1734 "hhuuhhuu bug in acpi video driver.\n");
1736 if (data
->brightness
)
1737 kfree(data
->brightness
->levels
);
1738 kfree(data
->brightness
);
1745 /* acpi_video interface */
1747 static int acpi_video_bus_start_devices(struct acpi_video_bus
*video
)
1749 return acpi_video_bus_DOS(video
, 1, 0);
1752 static int acpi_video_bus_stop_devices(struct acpi_video_bus
*video
)
1754 return acpi_video_bus_DOS(video
, 0, 1);
1757 static void acpi_video_bus_notify(acpi_handle handle
, u32 event
, void *data
)
1759 struct acpi_video_bus
*video
= data
;
1760 struct acpi_device
*device
= NULL
;
1762 printk("video bus notify\n");
1767 device
= video
->device
;
1770 case ACPI_VIDEO_NOTIFY_SWITCH
: /* User requested a switch,
1771 * most likely via hotkey. */
1772 acpi_bus_generate_event(device
, event
, 0);
1775 case ACPI_VIDEO_NOTIFY_PROBE
: /* User plugged in or removed a video
1777 acpi_video_device_enumerate(video
);
1778 acpi_video_device_rebind(video
);
1779 acpi_video_switch_output(video
, event
);
1780 acpi_bus_generate_event(device
, event
, 0);
1783 case ACPI_VIDEO_NOTIFY_CYCLE
: /* Cycle Display output hotkey pressed. */
1784 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
: /* Next Display output hotkey pressed. */
1785 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT
: /* previous Display output hotkey pressed. */
1786 acpi_video_switch_output(video
, event
);
1787 acpi_bus_generate_event(device
, event
, 0);
1791 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
1792 "Unsupported event [0x%x]\n", event
));
1799 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
)
1801 struct acpi_video_device
*video_device
= data
;
1802 struct acpi_device
*device
= NULL
;
1807 device
= video_device
->dev
;
1810 case ACPI_VIDEO_NOTIFY_SWITCH
: /* change in status (cycle output device) */
1811 case ACPI_VIDEO_NOTIFY_PROBE
: /* change in status (output device status) */
1812 acpi_bus_generate_event(device
, event
, 0);
1814 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
: /* Cycle brightness */
1815 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
: /* Increase brightness */
1816 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
: /* Decrease brightness */
1817 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
: /* zero brightnesss */
1818 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
: /* display device off */
1819 acpi_video_switch_brightness(video_device
, event
);
1820 acpi_bus_generate_event(device
, event
, 0);
1823 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
1824 "Unsupported event [0x%x]\n", event
));
1830 static int acpi_video_bus_add(struct acpi_device
*device
)
1833 acpi_status status
= 0;
1834 struct acpi_video_bus
*video
= NULL
;
1840 video
= kzalloc(sizeof(struct acpi_video_bus
), GFP_KERNEL
);
1844 video
->device
= device
;
1845 strcpy(acpi_device_name(device
), ACPI_VIDEO_BUS_NAME
);
1846 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
1847 acpi_driver_data(device
) = video
;
1849 acpi_video_bus_find_cap(video
);
1850 result
= acpi_video_bus_check(video
);
1854 result
= acpi_video_bus_add_fs(device
);
1858 init_MUTEX(&video
->sem
);
1859 INIT_LIST_HEAD(&video
->video_device_list
);
1861 acpi_video_bus_get_devices(video
, device
);
1862 acpi_video_bus_start_devices(video
);
1864 status
= acpi_install_notify_handler(device
->handle
,
1866 acpi_video_bus_notify
, video
);
1867 if (ACPI_FAILURE(status
)) {
1868 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
1869 "Error installing notify handler\n"));
1870 acpi_video_bus_stop_devices(video
);
1871 acpi_video_bus_put_devices(video
);
1872 kfree(video
->attached_array
);
1873 acpi_video_bus_remove_fs(device
);
1878 printk(KERN_INFO PREFIX
"%s [%s] (multi-head: %s rom: %s post: %s)\n",
1879 ACPI_VIDEO_DEVICE_NAME
, acpi_device_bid(device
),
1880 video
->flags
.multihead
? "yes" : "no",
1881 video
->flags
.rom
? "yes" : "no",
1882 video
->flags
.post
? "yes" : "no");
1891 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
)
1893 acpi_status status
= 0;
1894 struct acpi_video_bus
*video
= NULL
;
1897 if (!device
|| !acpi_driver_data(device
))
1900 video
= acpi_driver_data(device
);
1902 acpi_video_bus_stop_devices(video
);
1904 status
= acpi_remove_notify_handler(video
->device
->handle
,
1906 acpi_video_bus_notify
);
1908 acpi_video_bus_put_devices(video
);
1909 acpi_video_bus_remove_fs(device
);
1911 kfree(video
->attached_array
);
1917 static int __init
acpi_video_init(void)
1923 acpi_dbg_level = 0xFFFFFFFF;
1924 acpi_dbg_layer = 0x08000000;
1927 acpi_video_dir
= proc_mkdir(ACPI_VIDEO_CLASS
, acpi_root_dir
);
1928 if (!acpi_video_dir
)
1930 acpi_video_dir
->owner
= THIS_MODULE
;
1932 result
= acpi_bus_register_driver(&acpi_video_bus
);
1934 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
1941 static void __exit
acpi_video_exit(void)
1944 acpi_bus_unregister_driver(&acpi_video_bus
);
1946 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
1951 module_init(acpi_video_init
);
1952 module_exit(acpi_video_exit
);