2 * video.c - ACPI Video Driver ($Revision:$)
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <linux/sort.h>
40 #include <asm/uaccess.h>
42 #include <acpi/acpi_bus.h>
43 #include <acpi/acpi_drivers.h>
45 #define ACPI_VIDEO_CLASS "video"
46 #define ACPI_VIDEO_BUS_NAME "Video Bus"
47 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
48 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
49 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
50 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
51 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
52 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
54 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
55 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
56 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
57 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
58 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
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 brightness_switch_enabled
= 1;
75 module_param(brightness_switch_enabled
, bool, 0644);
77 static int acpi_video_bus_add(struct acpi_device
*device
);
78 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
);
79 static int acpi_video_resume(struct acpi_device
*device
);
81 static const struct acpi_device_id video_device_ids
[] = {
85 MODULE_DEVICE_TABLE(acpi
, video_device_ids
);
87 static struct acpi_driver acpi_video_bus
= {
89 .class = ACPI_VIDEO_CLASS
,
90 .ids
= video_device_ids
,
92 .add
= acpi_video_bus_add
,
93 .remove
= acpi_video_bus_remove
,
94 .resume
= acpi_video_resume
,
98 struct acpi_video_bus_flags
{
99 u8 multihead
:1; /* can switch video heads */
100 u8 rom
:1; /* can retrieve a video rom */
101 u8 post
:1; /* can configure the head to */
105 struct acpi_video_bus_cap
{
106 u8 _DOS
:1; /*Enable/Disable output switching */
107 u8 _DOD
:1; /*Enumerate all devices attached to display adapter */
108 u8 _ROM
:1; /*Get ROM Data */
109 u8 _GPD
:1; /*Get POST Device */
110 u8 _SPD
:1; /*Set POST Device */
111 u8 _VPO
:1; /*Video POST Options */
115 struct acpi_video_device_attrib
{
116 u32 display_index
:4; /* A zero-based instance of the Display */
117 u32 display_port_attachment
:4; /*This field differentiates the display type */
118 u32 display_type
:4; /*Describe the specific type in use */
119 u32 vendor_specific
:4; /*Chipset Vendor Specific */
120 u32 bios_can_detect
:1; /*BIOS can detect the device */
121 u32 depend_on_vga
:1; /*Non-VGA output device whose power is related to
123 u32 pipe_id
:3; /*For VGA multiple-head devices. */
124 u32 reserved
:10; /*Must be 0 */
125 u32 device_id_scheme
:1; /*Device ID Scheme */
128 struct acpi_video_enumerated_device
{
131 struct acpi_video_device_attrib attrib
;
133 struct acpi_video_device
*bind_info
;
136 struct acpi_video_bus
{
137 struct acpi_device
*device
;
139 struct acpi_video_enumerated_device
*attached_array
;
141 struct acpi_video_bus_cap cap
;
142 struct acpi_video_bus_flags flags
;
143 struct list_head video_device_list
;
144 struct mutex device_list_lock
; /* protects video_device_list */
145 struct proc_dir_entry
*dir
;
146 struct input_dev
*input
;
147 char phys
[32]; /* for input device */
150 struct acpi_video_device_flags
{
160 struct acpi_video_device_cap
{
161 u8 _ADR
:1; /*Return the unique ID */
162 u8 _BCL
:1; /*Query list of brightness control levels supported */
163 u8 _BCM
:1; /*Set the brightness level */
164 u8 _BQC
:1; /* Get current brightness level */
165 u8 _DDC
:1; /*Return the EDID for this device */
166 u8 _DCS
:1; /*Return status of output device */
167 u8 _DGS
:1; /*Query graphics state */
168 u8 _DSS
:1; /*Device state set */
171 struct acpi_video_device_brightness
{
177 struct acpi_video_device
{
178 unsigned long device_id
;
179 struct acpi_video_device_flags flags
;
180 struct acpi_video_device_cap cap
;
181 struct list_head entry
;
182 struct acpi_video_bus
*video
;
183 struct acpi_device
*dev
;
184 struct acpi_video_device_brightness
*brightness
;
185 struct backlight_device
*backlight
;
186 struct thermal_cooling_device
*cdev
;
187 struct output_device
*output_dev
;
191 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
);
192 static struct file_operations acpi_video_bus_info_fops
= {
193 .owner
= THIS_MODULE
,
194 .open
= acpi_video_bus_info_open_fs
,
197 .release
= single_release
,
200 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
);
201 static struct file_operations acpi_video_bus_ROM_fops
= {
202 .owner
= THIS_MODULE
,
203 .open
= acpi_video_bus_ROM_open_fs
,
206 .release
= single_release
,
209 static int acpi_video_bus_POST_info_open_fs(struct inode
*inode
,
211 static struct file_operations acpi_video_bus_POST_info_fops
= {
212 .owner
= THIS_MODULE
,
213 .open
= acpi_video_bus_POST_info_open_fs
,
216 .release
= single_release
,
219 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
);
220 static struct file_operations acpi_video_bus_POST_fops
= {
221 .owner
= THIS_MODULE
,
222 .open
= acpi_video_bus_POST_open_fs
,
225 .release
= single_release
,
228 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
);
229 static struct file_operations acpi_video_bus_DOS_fops
= {
230 .owner
= THIS_MODULE
,
231 .open
= acpi_video_bus_DOS_open_fs
,
234 .release
= single_release
,
238 static int acpi_video_device_info_open_fs(struct inode
*inode
,
240 static struct file_operations acpi_video_device_info_fops
= {
241 .owner
= THIS_MODULE
,
242 .open
= acpi_video_device_info_open_fs
,
245 .release
= single_release
,
248 static int acpi_video_device_state_open_fs(struct inode
*inode
,
250 static struct file_operations acpi_video_device_state_fops
= {
251 .owner
= THIS_MODULE
,
252 .open
= acpi_video_device_state_open_fs
,
255 .release
= single_release
,
258 static int acpi_video_device_brightness_open_fs(struct inode
*inode
,
260 static struct file_operations acpi_video_device_brightness_fops
= {
261 .owner
= THIS_MODULE
,
262 .open
= acpi_video_device_brightness_open_fs
,
265 .release
= single_release
,
268 static int acpi_video_device_EDID_open_fs(struct inode
*inode
,
270 static struct file_operations acpi_video_device_EDID_fops
= {
271 .owner
= THIS_MODULE
,
272 .open
= acpi_video_device_EDID_open_fs
,
275 .release
= single_release
,
278 static char device_decode
[][30] = {
279 "motherboard VGA device",
285 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
);
286 static void acpi_video_device_rebind(struct acpi_video_bus
*video
);
287 static void acpi_video_device_bind(struct acpi_video_bus
*video
,
288 struct acpi_video_device
*device
);
289 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
);
290 static int acpi_video_device_lcd_set_level(struct acpi_video_device
*device
,
292 static int acpi_video_device_lcd_get_level_current(
293 struct acpi_video_device
*device
,
294 unsigned long long *level
);
295 static int acpi_video_get_next_level(struct acpi_video_device
*device
,
296 u32 level_current
, u32 event
);
297 static void acpi_video_switch_brightness(struct acpi_video_device
*device
,
299 static int acpi_video_device_get_state(struct acpi_video_device
*device
,
300 unsigned long long *state
);
301 static int acpi_video_output_get(struct output_device
*od
);
302 static int acpi_video_device_set_state(struct acpi_video_device
*device
, int state
);
304 /*backlight device sysfs support*/
305 static int acpi_video_get_brightness(struct backlight_device
*bd
)
307 unsigned long long cur_level
;
309 struct acpi_video_device
*vd
=
310 (struct acpi_video_device
*)bl_get_data(bd
);
311 acpi_video_device_lcd_get_level_current(vd
, &cur_level
);
312 for (i
= 2; i
< vd
->brightness
->count
; i
++) {
313 if (vd
->brightness
->levels
[i
] == cur_level
)
314 /* The first two entries are special - see page 575
315 of the ACPI spec 3.0 */
321 static int acpi_video_set_brightness(struct backlight_device
*bd
)
323 int request_level
= bd
->props
.brightness
+2;
324 struct acpi_video_device
*vd
=
325 (struct acpi_video_device
*)bl_get_data(bd
);
326 acpi_video_device_lcd_set_level(vd
,
327 vd
->brightness
->levels
[request_level
]);
331 static struct backlight_ops acpi_backlight_ops
= {
332 .get_brightness
= acpi_video_get_brightness
,
333 .update_status
= acpi_video_set_brightness
,
336 /*video output device sysfs support*/
337 static int acpi_video_output_get(struct output_device
*od
)
339 unsigned long long state
;
340 struct acpi_video_device
*vd
=
341 (struct acpi_video_device
*)dev_get_drvdata(&od
->dev
);
342 acpi_video_device_get_state(vd
, &state
);
346 static int acpi_video_output_set(struct output_device
*od
)
348 unsigned long state
= od
->request_state
;
349 struct acpi_video_device
*vd
=
350 (struct acpi_video_device
*)dev_get_drvdata(&od
->dev
);
351 return acpi_video_device_set_state(vd
, state
);
354 static struct output_properties acpi_output_properties
= {
355 .set_state
= acpi_video_output_set
,
356 .get_status
= acpi_video_output_get
,
360 /* thermal cooling device callbacks */
361 static int video_get_max_state(struct thermal_cooling_device
*cdev
, char *buf
)
363 struct acpi_device
*device
= cdev
->devdata
;
364 struct acpi_video_device
*video
= acpi_driver_data(device
);
366 return sprintf(buf
, "%d\n", video
->brightness
->count
- 3);
369 static int video_get_cur_state(struct thermal_cooling_device
*cdev
, char *buf
)
371 struct acpi_device
*device
= cdev
->devdata
;
372 struct acpi_video_device
*video
= acpi_driver_data(device
);
373 unsigned long long level
;
376 acpi_video_device_lcd_get_level_current(video
, &level
);
377 for (state
= 2; state
< video
->brightness
->count
; state
++)
378 if (level
== video
->brightness
->levels
[state
])
379 return sprintf(buf
, "%d\n",
380 video
->brightness
->count
- state
- 1);
386 video_set_cur_state(struct thermal_cooling_device
*cdev
, unsigned int state
)
388 struct acpi_device
*device
= cdev
->devdata
;
389 struct acpi_video_device
*video
= acpi_driver_data(device
);
392 if ( state
>= video
->brightness
->count
- 2)
395 state
= video
->brightness
->count
- state
;
396 level
= video
->brightness
->levels
[state
-1];
397 return acpi_video_device_lcd_set_level(video
, level
);
400 static struct thermal_cooling_device_ops video_cooling_ops
= {
401 .get_max_state
= video_get_max_state
,
402 .get_cur_state
= video_get_cur_state
,
403 .set_cur_state
= video_set_cur_state
,
406 /* --------------------------------------------------------------------------
408 -------------------------------------------------------------------------- */
413 acpi_video_device_query(struct acpi_video_device
*device
, unsigned long long *state
)
417 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DGS", NULL
, state
);
423 acpi_video_device_get_state(struct acpi_video_device
*device
,
424 unsigned long long *state
)
428 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DCS", NULL
, state
);
434 acpi_video_device_set_state(struct acpi_video_device
*device
, int state
)
437 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
438 struct acpi_object_list args
= { 1, &arg0
};
439 unsigned long long ret
;
442 arg0
.integer
.value
= state
;
443 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DSS", &args
, &ret
);
449 acpi_video_device_lcd_query_levels(struct acpi_video_device
*device
,
450 union acpi_object
**levels
)
453 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
454 union acpi_object
*obj
;
459 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCL", NULL
, &buffer
);
460 if (!ACPI_SUCCESS(status
))
462 obj
= (union acpi_object
*)buffer
.pointer
;
463 if (!obj
|| (obj
->type
!= ACPI_TYPE_PACKAGE
)) {
464 printk(KERN_ERR PREFIX
"Invalid _BCL data\n");
474 kfree(buffer
.pointer
);
480 acpi_video_device_lcd_set_level(struct acpi_video_device
*device
, int level
)
483 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
484 struct acpi_object_list args
= { 1, &arg0
};
488 arg0
.integer
.value
= level
;
490 if (device
->cap
._BCM
)
491 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCM",
493 device
->brightness
->curr
= level
;
494 for (state
= 2; state
< device
->brightness
->count
; state
++)
495 if (level
== device
->brightness
->levels
[state
])
496 device
->backlight
->props
.brightness
= state
- 2;
502 acpi_video_device_lcd_get_level_current(struct acpi_video_device
*device
,
503 unsigned long long *level
)
505 if (device
->cap
._BQC
)
506 return acpi_evaluate_integer(device
->dev
->handle
, "_BQC", NULL
,
508 *level
= device
->brightness
->curr
;
513 acpi_video_device_EDID(struct acpi_video_device
*device
,
514 union acpi_object
**edid
, ssize_t length
)
517 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
518 union acpi_object
*obj
;
519 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
520 struct acpi_object_list args
= { 1, &arg0
};
528 arg0
.integer
.value
= 1;
529 else if (length
== 256)
530 arg0
.integer
.value
= 2;
534 status
= acpi_evaluate_object(device
->dev
->handle
, "_DDC", &args
, &buffer
);
535 if (ACPI_FAILURE(status
))
538 obj
= buffer
.pointer
;
540 if (obj
&& obj
->type
== ACPI_TYPE_BUFFER
)
543 printk(KERN_ERR PREFIX
"Invalid _DDC data\n");
554 acpi_video_bus_set_POST(struct acpi_video_bus
*video
, unsigned long option
)
557 unsigned long long tmp
;
558 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
559 struct acpi_object_list args
= { 1, &arg0
};
562 arg0
.integer
.value
= option
;
564 status
= acpi_evaluate_integer(video
->device
->handle
, "_SPD", &args
, &tmp
);
565 if (ACPI_SUCCESS(status
))
566 status
= tmp
? (-EINVAL
) : (AE_OK
);
572 acpi_video_bus_get_POST(struct acpi_video_bus
*video
, unsigned long long *id
)
576 status
= acpi_evaluate_integer(video
->device
->handle
, "_GPD", NULL
, id
);
582 acpi_video_bus_POST_options(struct acpi_video_bus
*video
,
583 unsigned long long *options
)
587 status
= acpi_evaluate_integer(video
->device
->handle
, "_VPO", NULL
, options
);
595 * video : video bus device pointer
597 * 0. The system BIOS should NOT automatically switch(toggle)
598 * the active display output.
599 * 1. The system BIOS should automatically switch (toggle) the
600 * active display output. No switch event.
601 * 2. The _DGS value should be locked.
602 * 3. The system BIOS should not automatically switch (toggle) the
603 * active display output, but instead generate the display switch
606 * 0. The system BIOS should automatically control the brightness level
607 * of the LCD when the power changes from AC to DC
608 * 1. The system BIOS should NOT automatically control the brightness
609 * level of the LCD when the power changes from AC to DC.
615 acpi_video_bus_DOS(struct acpi_video_bus
*video
, int bios_flag
, int lcd_flag
)
617 acpi_integer status
= 0;
618 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
619 struct acpi_object_list args
= { 1, &arg0
};
622 if (bios_flag
< 0 || bios_flag
> 3 || lcd_flag
< 0 || lcd_flag
> 1) {
626 arg0
.integer
.value
= (lcd_flag
<< 2) | bios_flag
;
627 video
->dos_setting
= arg0
.integer
.value
;
628 acpi_evaluate_object(video
->device
->handle
, "_DOS", &args
, NULL
);
635 * Simple comparison function used to sort backlight levels.
639 acpi_video_cmp_level(const void *a
, const void *b
)
641 return *(int *)a
- *(int *)b
;
646 * device : video output device (LCD, CRT, ..)
649 * Maximum brightness level
651 * Allocate and initialize device->brightness.
655 acpi_video_init_brightness(struct acpi_video_device
*device
)
657 union acpi_object
*obj
= NULL
;
658 int i
, max_level
= 0, count
= 0;
659 union acpi_object
*o
;
660 struct acpi_video_device_brightness
*br
= NULL
;
662 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device
, &obj
))) {
663 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Could not query available "
664 "LCD brightness level\n"));
668 if (obj
->package
.count
< 2)
671 br
= kzalloc(sizeof(*br
), GFP_KERNEL
);
673 printk(KERN_ERR
"can't allocate memory\n");
677 br
->levels
= kmalloc(obj
->package
.count
* sizeof *(br
->levels
),
682 for (i
= 0; i
< obj
->package
.count
; i
++) {
683 o
= (union acpi_object
*)&obj
->package
.elements
[i
];
684 if (o
->type
!= ACPI_TYPE_INTEGER
) {
685 printk(KERN_ERR PREFIX
"Invalid data\n");
688 br
->levels
[count
] = (u32
) o
->integer
.value
;
690 if (br
->levels
[count
] > max_level
)
691 max_level
= br
->levels
[count
];
695 /* don't sort the first two brightness levels */
696 sort(&br
->levels
[2], count
- 2, sizeof(br
->levels
[2]),
697 acpi_video_cmp_level
, NULL
);
700 goto out_free_levels
;
703 device
->brightness
= br
;
704 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "found %d brightness levels\n", count
));
713 device
->brightness
= NULL
;
720 * device : video output device (LCD, CRT, ..)
725 * Find out all required AML methods defined under the output
729 static void acpi_video_device_find_cap(struct acpi_video_device
*device
)
731 acpi_handle h_dummy1
;
735 memset(&device
->cap
, 0, sizeof(device
->cap
));
737 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_ADR", &h_dummy1
))) {
738 device
->cap
._ADR
= 1;
740 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCL", &h_dummy1
))) {
741 device
->cap
._BCL
= 1;
743 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCM", &h_dummy1
))) {
744 device
->cap
._BCM
= 1;
746 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
,"_BQC",&h_dummy1
)))
747 device
->cap
._BQC
= 1;
748 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DDC", &h_dummy1
))) {
749 device
->cap
._DDC
= 1;
751 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DCS", &h_dummy1
))) {
752 device
->cap
._DCS
= 1;
754 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DGS", &h_dummy1
))) {
755 device
->cap
._DGS
= 1;
757 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DSS", &h_dummy1
))) {
758 device
->cap
._DSS
= 1;
761 if (acpi_video_backlight_support())
762 max_level
= acpi_video_init_brightness(device
);
764 if (device
->cap
._BCL
&& device
->cap
._BCM
&& max_level
> 0) {
766 static int count
= 0;
768 name
= kzalloc(MAX_NAME_LEN
, GFP_KERNEL
);
772 sprintf(name
, "acpi_video%d", count
++);
773 device
->backlight
= backlight_device_register(name
,
774 NULL
, device
, &acpi_backlight_ops
);
775 device
->backlight
->props
.max_brightness
= device
->brightness
->count
-3;
777 * If there exists the _BQC object, the _BQC object will be
778 * called to get the current backlight brightness. Otherwise
779 * the brightness will be set to the maximum.
781 if (device
->cap
._BQC
)
782 device
->backlight
->props
.brightness
=
783 acpi_video_get_brightness(device
->backlight
);
785 device
->backlight
->props
.brightness
=
786 device
->backlight
->props
.max_brightness
;
787 backlight_update_status(device
->backlight
);
790 device
->cdev
= thermal_cooling_device_register("LCD",
791 device
->dev
, &video_cooling_ops
);
792 if (IS_ERR(device
->cdev
))
795 dev_info(&device
->dev
->dev
, "registered as cooling_device%d\n",
797 result
= sysfs_create_link(&device
->dev
->dev
.kobj
,
798 &device
->cdev
->device
.kobj
,
801 printk(KERN_ERR PREFIX
"Create sysfs link\n");
802 result
= sysfs_create_link(&device
->cdev
->device
.kobj
,
803 &device
->dev
->dev
.kobj
, "device");
805 printk(KERN_ERR PREFIX
"Create sysfs link\n");
809 if (acpi_video_display_switch_support()) {
811 if (device
->cap
._DCS
&& device
->cap
._DSS
) {
814 name
= kzalloc(MAX_NAME_LEN
, GFP_KERNEL
);
817 sprintf(name
, "acpi_video%d", count
++);
818 device
->output_dev
= video_output_register(name
,
819 NULL
, device
, &acpi_output_properties
);
827 * device : video output device (VGA)
832 * Find out all required AML methods defined under the video bus device.
835 static void acpi_video_bus_find_cap(struct acpi_video_bus
*video
)
837 acpi_handle h_dummy1
;
839 memset(&video
->cap
, 0, sizeof(video
->cap
));
840 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOS", &h_dummy1
))) {
843 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOD", &h_dummy1
))) {
846 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_ROM", &h_dummy1
))) {
849 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_GPD", &h_dummy1
))) {
852 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_SPD", &h_dummy1
))) {
855 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_VPO", &h_dummy1
))) {
861 * Check whether the video bus device has required AML method to
862 * support the desired features
865 static int acpi_video_bus_check(struct acpi_video_bus
*video
)
867 acpi_status status
= -ENOENT
;
873 dev
= acpi_get_physical_pci_device(video
->device
->handle
);
878 /* Since there is no HID, CID and so on for VGA driver, we have
879 * to check well known required nodes.
882 /* Does this device support video switching? */
883 if (video
->cap
._DOS
) {
884 video
->flags
.multihead
= 1;
888 /* Does this device support retrieving a video ROM? */
889 if (video
->cap
._ROM
) {
890 video
->flags
.rom
= 1;
894 /* Does this device support configuring which video device to POST? */
895 if (video
->cap
._GPD
&& video
->cap
._SPD
&& video
->cap
._VPO
) {
896 video
->flags
.post
= 1;
903 /* --------------------------------------------------------------------------
905 -------------------------------------------------------------------------- */
907 static struct proc_dir_entry
*acpi_video_dir
;
911 static int acpi_video_device_info_seq_show(struct seq_file
*seq
, void *offset
)
913 struct acpi_video_device
*dev
= seq
->private;
919 seq_printf(seq
, "device_id: 0x%04x\n", (u32
) dev
->device_id
);
920 seq_printf(seq
, "type: ");
922 seq_printf(seq
, "CRT\n");
923 else if (dev
->flags
.lcd
)
924 seq_printf(seq
, "LCD\n");
925 else if (dev
->flags
.tvout
)
926 seq_printf(seq
, "TVOUT\n");
927 else if (dev
->flags
.dvi
)
928 seq_printf(seq
, "DVI\n");
930 seq_printf(seq
, "UNKNOWN\n");
932 seq_printf(seq
, "known by bios: %s\n", dev
->flags
.bios
? "yes" : "no");
939 acpi_video_device_info_open_fs(struct inode
*inode
, struct file
*file
)
941 return single_open(file
, acpi_video_device_info_seq_show
,
945 static int acpi_video_device_state_seq_show(struct seq_file
*seq
, void *offset
)
948 struct acpi_video_device
*dev
= seq
->private;
949 unsigned long long state
;
955 status
= acpi_video_device_get_state(dev
, &state
);
956 seq_printf(seq
, "state: ");
957 if (ACPI_SUCCESS(status
))
958 seq_printf(seq
, "0x%02llx\n", state
);
960 seq_printf(seq
, "<not supported>\n");
962 status
= acpi_video_device_query(dev
, &state
);
963 seq_printf(seq
, "query: ");
964 if (ACPI_SUCCESS(status
))
965 seq_printf(seq
, "0x%02llx\n", state
);
967 seq_printf(seq
, "<not supported>\n");
974 acpi_video_device_state_open_fs(struct inode
*inode
, struct file
*file
)
976 return single_open(file
, acpi_video_device_state_seq_show
,
981 acpi_video_device_write_state(struct file
*file
,
982 const char __user
* buffer
,
983 size_t count
, loff_t
* data
)
986 struct seq_file
*m
= file
->private_data
;
987 struct acpi_video_device
*dev
= m
->private;
988 char str
[12] = { 0 };
992 if (!dev
|| count
+ 1 > sizeof str
)
995 if (copy_from_user(str
, buffer
, count
))
999 state
= simple_strtoul(str
, NULL
, 0);
1000 state
&= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1002 status
= acpi_video_device_set_state(dev
, state
);
1011 acpi_video_device_brightness_seq_show(struct seq_file
*seq
, void *offset
)
1013 struct acpi_video_device
*dev
= seq
->private;
1017 if (!dev
|| !dev
->brightness
) {
1018 seq_printf(seq
, "<not supported>\n");
1022 seq_printf(seq
, "levels: ");
1023 for (i
= 0; i
< dev
->brightness
->count
; i
++)
1024 seq_printf(seq
, " %d", dev
->brightness
->levels
[i
]);
1025 seq_printf(seq
, "\ncurrent: %d\n", dev
->brightness
->curr
);
1031 acpi_video_device_brightness_open_fs(struct inode
*inode
, struct file
*file
)
1033 return single_open(file
, acpi_video_device_brightness_seq_show
,
1038 acpi_video_device_write_brightness(struct file
*file
,
1039 const char __user
* buffer
,
1040 size_t count
, loff_t
* data
)
1042 struct seq_file
*m
= file
->private_data
;
1043 struct acpi_video_device
*dev
= m
->private;
1044 char str
[5] = { 0 };
1045 unsigned int level
= 0;
1049 if (!dev
|| !dev
->brightness
|| count
+ 1 > sizeof str
)
1052 if (copy_from_user(str
, buffer
, count
))
1056 level
= simple_strtoul(str
, NULL
, 0);
1061 /* validate through the list of available levels */
1062 for (i
= 0; i
< dev
->brightness
->count
; i
++)
1063 if (level
== dev
->brightness
->levels
[i
]) {
1065 (acpi_video_device_lcd_set_level(dev
, level
)))
1066 dev
->brightness
->curr
= level
;
1073 static int acpi_video_device_EDID_seq_show(struct seq_file
*seq
, void *offset
)
1075 struct acpi_video_device
*dev
= seq
->private;
1078 union acpi_object
*edid
= NULL
;
1084 status
= acpi_video_device_EDID(dev
, &edid
, 128);
1085 if (ACPI_FAILURE(status
)) {
1086 status
= acpi_video_device_EDID(dev
, &edid
, 256);
1089 if (ACPI_FAILURE(status
)) {
1093 if (edid
&& edid
->type
== ACPI_TYPE_BUFFER
) {
1094 for (i
= 0; i
< edid
->buffer
.length
; i
++)
1095 seq_putc(seq
, edid
->buffer
.pointer
[i
]);
1100 seq_printf(seq
, "<not supported>\n");
1108 acpi_video_device_EDID_open_fs(struct inode
*inode
, struct file
*file
)
1110 return single_open(file
, acpi_video_device_EDID_seq_show
,
1114 static int acpi_video_device_add_fs(struct acpi_device
*device
)
1116 struct proc_dir_entry
*entry
, *device_dir
;
1117 struct acpi_video_device
*vid_dev
;
1119 vid_dev
= acpi_driver_data(device
);
1123 device_dir
= proc_mkdir(acpi_device_bid(device
),
1124 vid_dev
->video
->dir
);
1128 device_dir
->owner
= THIS_MODULE
;
1131 entry
= proc_create_data("info", S_IRUGO
, device_dir
,
1132 &acpi_video_device_info_fops
, acpi_driver_data(device
));
1134 goto err_remove_dir
;
1137 acpi_video_device_state_fops
.write
= acpi_video_device_write_state
;
1138 entry
= proc_create_data("state", S_IFREG
| S_IRUGO
| S_IWUSR
,
1140 &acpi_video_device_state_fops
,
1141 acpi_driver_data(device
));
1143 goto err_remove_info
;
1145 /* 'brightness' [R/W] */
1146 acpi_video_device_brightness_fops
.write
=
1147 acpi_video_device_write_brightness
;
1148 entry
= proc_create_data("brightness", S_IFREG
| S_IRUGO
| S_IWUSR
,
1150 &acpi_video_device_brightness_fops
,
1151 acpi_driver_data(device
));
1153 goto err_remove_state
;
1156 entry
= proc_create_data("EDID", S_IRUGO
, device_dir
,
1157 &acpi_video_device_EDID_fops
,
1158 acpi_driver_data(device
));
1160 goto err_remove_brightness
;
1162 acpi_device_dir(device
) = device_dir
;
1166 err_remove_brightness
:
1167 remove_proc_entry("brightness", device_dir
);
1169 remove_proc_entry("state", device_dir
);
1171 remove_proc_entry("info", device_dir
);
1173 remove_proc_entry(acpi_device_bid(device
), vid_dev
->video
->dir
);
1177 static int acpi_video_device_remove_fs(struct acpi_device
*device
)
1179 struct acpi_video_device
*vid_dev
;
1180 struct proc_dir_entry
*device_dir
;
1182 vid_dev
= acpi_driver_data(device
);
1183 if (!vid_dev
|| !vid_dev
->video
|| !vid_dev
->video
->dir
)
1186 device_dir
= acpi_device_dir(device
);
1188 remove_proc_entry("info", device_dir
);
1189 remove_proc_entry("state", device_dir
);
1190 remove_proc_entry("brightness", device_dir
);
1191 remove_proc_entry("EDID", device_dir
);
1192 remove_proc_entry(acpi_device_bid(device
), vid_dev
->video
->dir
);
1193 acpi_device_dir(device
) = NULL
;
1200 static int acpi_video_bus_info_seq_show(struct seq_file
*seq
, void *offset
)
1202 struct acpi_video_bus
*video
= seq
->private;
1208 seq_printf(seq
, "Switching heads: %s\n",
1209 video
->flags
.multihead
? "yes" : "no");
1210 seq_printf(seq
, "Video ROM: %s\n",
1211 video
->flags
.rom
? "yes" : "no");
1212 seq_printf(seq
, "Device to be POSTed on boot: %s\n",
1213 video
->flags
.post
? "yes" : "no");
1219 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
)
1221 return single_open(file
, acpi_video_bus_info_seq_show
,
1225 static int acpi_video_bus_ROM_seq_show(struct seq_file
*seq
, void *offset
)
1227 struct acpi_video_bus
*video
= seq
->private;
1233 printk(KERN_INFO PREFIX
"Please implement %s\n", __func__
);
1234 seq_printf(seq
, "<TODO>\n");
1240 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
)
1242 return single_open(file
, acpi_video_bus_ROM_seq_show
, PDE(inode
)->data
);
1245 static int acpi_video_bus_POST_info_seq_show(struct seq_file
*seq
, void *offset
)
1247 struct acpi_video_bus
*video
= seq
->private;
1248 unsigned long long options
;
1255 status
= acpi_video_bus_POST_options(video
, &options
);
1256 if (ACPI_SUCCESS(status
)) {
1257 if (!(options
& 1)) {
1258 printk(KERN_WARNING PREFIX
1259 "The motherboard VGA device is not listed as a possible POST device.\n");
1260 printk(KERN_WARNING PREFIX
1261 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1263 printk("%llx\n", options
);
1264 seq_printf(seq
, "can POST: <integrated video>");
1266 seq_printf(seq
, " <PCI video>");
1268 seq_printf(seq
, " <AGP video>");
1269 seq_putc(seq
, '\n');
1271 seq_printf(seq
, "<not supported>\n");
1277 acpi_video_bus_POST_info_open_fs(struct inode
*inode
, struct file
*file
)
1279 return single_open(file
, acpi_video_bus_POST_info_seq_show
,
1283 static int acpi_video_bus_POST_seq_show(struct seq_file
*seq
, void *offset
)
1285 struct acpi_video_bus
*video
= seq
->private;
1287 unsigned long long id
;
1293 status
= acpi_video_bus_get_POST(video
, &id
);
1294 if (!ACPI_SUCCESS(status
)) {
1295 seq_printf(seq
, "<not supported>\n");
1298 seq_printf(seq
, "device POSTed is <%s>\n", device_decode
[id
& 3]);
1304 static int acpi_video_bus_DOS_seq_show(struct seq_file
*seq
, void *offset
)
1306 struct acpi_video_bus
*video
= seq
->private;
1309 seq_printf(seq
, "DOS setting: <%d>\n", video
->dos_setting
);
1314 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
)
1316 return single_open(file
, acpi_video_bus_POST_seq_show
,
1320 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
)
1322 return single_open(file
, acpi_video_bus_DOS_seq_show
, PDE(inode
)->data
);
1326 acpi_video_bus_write_POST(struct file
*file
,
1327 const char __user
* buffer
,
1328 size_t count
, loff_t
* data
)
1331 struct seq_file
*m
= file
->private_data
;
1332 struct acpi_video_bus
*video
= m
->private;
1333 char str
[12] = { 0 };
1334 unsigned long long opt
, options
;
1337 if (!video
|| count
+ 1 > sizeof str
)
1340 status
= acpi_video_bus_POST_options(video
, &options
);
1341 if (!ACPI_SUCCESS(status
))
1344 if (copy_from_user(str
, buffer
, count
))
1348 opt
= strtoul(str
, NULL
, 0);
1352 /* just in case an OEM 'forgot' the motherboard... */
1355 if (options
& (1ul << opt
)) {
1356 status
= acpi_video_bus_set_POST(video
, opt
);
1357 if (!ACPI_SUCCESS(status
))
1366 acpi_video_bus_write_DOS(struct file
*file
,
1367 const char __user
* buffer
,
1368 size_t count
, loff_t
* data
)
1371 struct seq_file
*m
= file
->private_data
;
1372 struct acpi_video_bus
*video
= m
->private;
1373 char str
[12] = { 0 };
1377 if (!video
|| count
+ 1 > sizeof str
)
1380 if (copy_from_user(str
, buffer
, count
))
1384 opt
= strtoul(str
, NULL
, 0);
1388 status
= acpi_video_bus_DOS(video
, opt
& 0x3, (opt
& 0x4) >> 2);
1390 if (!ACPI_SUCCESS(status
))
1396 static int acpi_video_bus_add_fs(struct acpi_device
*device
)
1398 struct acpi_video_bus
*video
= acpi_driver_data(device
);
1399 struct proc_dir_entry
*device_dir
;
1400 struct proc_dir_entry
*entry
;
1402 device_dir
= proc_mkdir(acpi_device_bid(device
), acpi_video_dir
);
1406 device_dir
->owner
= THIS_MODULE
;
1409 entry
= proc_create_data("info", S_IRUGO
, device_dir
,
1410 &acpi_video_bus_info_fops
,
1411 acpi_driver_data(device
));
1413 goto err_remove_dir
;
1416 entry
= proc_create_data("ROM", S_IRUGO
, device_dir
,
1417 &acpi_video_bus_ROM_fops
,
1418 acpi_driver_data(device
));
1420 goto err_remove_info
;
1422 /* 'POST_info' [R] */
1423 entry
= proc_create_data("POST_info", S_IRUGO
, device_dir
,
1424 &acpi_video_bus_POST_info_fops
,
1425 acpi_driver_data(device
));
1427 goto err_remove_rom
;
1430 acpi_video_bus_POST_fops
.write
= acpi_video_bus_write_POST
;
1431 entry
= proc_create_data("POST", S_IFREG
| S_IRUGO
| S_IWUSR
,
1433 &acpi_video_bus_POST_fops
,
1434 acpi_driver_data(device
));
1436 goto err_remove_post_info
;
1439 acpi_video_bus_DOS_fops
.write
= acpi_video_bus_write_DOS
;
1440 entry
= proc_create_data("DOS", S_IFREG
| S_IRUGO
| S_IWUSR
,
1442 &acpi_video_bus_DOS_fops
,
1443 acpi_driver_data(device
));
1445 goto err_remove_post
;
1447 video
->dir
= acpi_device_dir(device
) = device_dir
;
1451 remove_proc_entry("POST", device_dir
);
1452 err_remove_post_info
:
1453 remove_proc_entry("POST_info", device_dir
);
1455 remove_proc_entry("ROM", device_dir
);
1457 remove_proc_entry("info", device_dir
);
1459 remove_proc_entry(acpi_device_bid(device
), acpi_video_dir
);
1463 static int acpi_video_bus_remove_fs(struct acpi_device
*device
)
1465 struct proc_dir_entry
*device_dir
= acpi_device_dir(device
);
1468 remove_proc_entry("info", device_dir
);
1469 remove_proc_entry("ROM", device_dir
);
1470 remove_proc_entry("POST_info", device_dir
);
1471 remove_proc_entry("POST", device_dir
);
1472 remove_proc_entry("DOS", device_dir
);
1473 remove_proc_entry(acpi_device_bid(device
), acpi_video_dir
);
1474 acpi_device_dir(device
) = NULL
;
1480 /* --------------------------------------------------------------------------
1482 -------------------------------------------------------------------------- */
1484 /* device interface */
1485 static struct acpi_video_device_attrib
*
1486 acpi_video_get_device_attr(struct acpi_video_bus
*video
, unsigned long device_id
)
1488 struct acpi_video_enumerated_device
*ids
;
1491 for (i
= 0; i
< video
->attached_count
; i
++) {
1492 ids
= &video
->attached_array
[i
];
1493 if ((ids
->value
.int_val
& 0xffff) == device_id
)
1494 return &ids
->value
.attrib
;
1501 acpi_video_bus_get_one_device(struct acpi_device
*device
,
1502 struct acpi_video_bus
*video
)
1504 unsigned long long device_id
;
1506 struct acpi_video_device
*data
;
1507 struct acpi_video_device_attrib
* attribute
;
1509 if (!device
|| !video
)
1513 acpi_evaluate_integer(device
->handle
, "_ADR", NULL
, &device_id
);
1514 if (ACPI_SUCCESS(status
)) {
1516 data
= kzalloc(sizeof(struct acpi_video_device
), GFP_KERNEL
);
1520 strcpy(acpi_device_name(device
), ACPI_VIDEO_DEVICE_NAME
);
1521 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
1522 device
->driver_data
= data
;
1524 data
->device_id
= device_id
;
1525 data
->video
= video
;
1528 attribute
= acpi_video_get_device_attr(video
, device_id
);
1530 if((attribute
!= NULL
) && attribute
->device_id_scheme
) {
1531 switch (attribute
->display_type
) {
1532 case ACPI_VIDEO_DISPLAY_CRT
:
1533 data
->flags
.crt
= 1;
1535 case ACPI_VIDEO_DISPLAY_TV
:
1536 data
->flags
.tvout
= 1;
1538 case ACPI_VIDEO_DISPLAY_DVI
:
1539 data
->flags
.dvi
= 1;
1541 case ACPI_VIDEO_DISPLAY_LCD
:
1542 data
->flags
.lcd
= 1;
1545 data
->flags
.unknown
= 1;
1548 if(attribute
->bios_can_detect
)
1549 data
->flags
.bios
= 1;
1551 data
->flags
.unknown
= 1;
1553 acpi_video_device_bind(video
, data
);
1554 acpi_video_device_find_cap(data
);
1556 status
= acpi_install_notify_handler(device
->handle
,
1558 acpi_video_device_notify
,
1560 if (ACPI_FAILURE(status
)) {
1561 printk(KERN_ERR PREFIX
1562 "Error installing notify handler\n");
1563 if(data
->brightness
)
1564 kfree(data
->brightness
->levels
);
1565 kfree(data
->brightness
);
1570 mutex_lock(&video
->device_list_lock
);
1571 list_add_tail(&data
->entry
, &video
->video_device_list
);
1572 mutex_unlock(&video
->device_list_lock
);
1574 acpi_video_device_add_fs(device
);
1584 * video : video bus device
1589 * Enumerate the video device list of the video bus,
1590 * bind the ids with the corresponding video devices
1591 * under the video bus.
1594 static void acpi_video_device_rebind(struct acpi_video_bus
*video
)
1596 struct acpi_video_device
*dev
;
1598 mutex_lock(&video
->device_list_lock
);
1600 list_for_each_entry(dev
, &video
->video_device_list
, entry
)
1601 acpi_video_device_bind(video
, dev
);
1603 mutex_unlock(&video
->device_list_lock
);
1608 * video : video bus device
1609 * device : video output device under the video
1615 * Bind the ids with the corresponding video devices
1616 * under the video bus.
1620 acpi_video_device_bind(struct acpi_video_bus
*video
,
1621 struct acpi_video_device
*device
)
1623 struct acpi_video_enumerated_device
*ids
;
1626 for (i
= 0; i
< video
->attached_count
; i
++) {
1627 ids
= &video
->attached_array
[i
];
1628 if (device
->device_id
== (ids
->value
.int_val
& 0xffff)) {
1629 ids
->bind_info
= device
;
1630 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "device_bind %d\n", i
));
1637 * video : video bus device
1642 * Call _DOD to enumerate all devices attached to display adapter
1646 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
)
1651 struct acpi_video_enumerated_device
*active_list
;
1652 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
1653 union acpi_object
*dod
= NULL
;
1654 union acpi_object
*obj
;
1656 status
= acpi_evaluate_object(video
->device
->handle
, "_DOD", NULL
, &buffer
);
1657 if (!ACPI_SUCCESS(status
)) {
1658 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _DOD"));
1662 dod
= buffer
.pointer
;
1663 if (!dod
|| (dod
->type
!= ACPI_TYPE_PACKAGE
)) {
1664 ACPI_EXCEPTION((AE_INFO
, status
, "Invalid _DOD data"));
1669 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Found %d video heads in _DOD\n",
1670 dod
->package
.count
));
1672 active_list
= kcalloc(1 + dod
->package
.count
,
1673 sizeof(struct acpi_video_enumerated_device
),
1681 for (i
= 0; i
< dod
->package
.count
; i
++) {
1682 obj
= &dod
->package
.elements
[i
];
1684 if (obj
->type
!= ACPI_TYPE_INTEGER
) {
1685 printk(KERN_ERR PREFIX
1686 "Invalid _DOD data in element %d\n", i
);
1690 active_list
[count
].value
.int_val
= obj
->integer
.value
;
1691 active_list
[count
].bind_info
= NULL
;
1692 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "dod element[%d] = %d\n", i
,
1693 (int)obj
->integer
.value
));
1697 kfree(video
->attached_array
);
1699 video
->attached_array
= active_list
;
1700 video
->attached_count
= count
;
1703 kfree(buffer
.pointer
);
1708 acpi_video_get_next_level(struct acpi_video_device
*device
,
1709 u32 level_current
, u32 event
)
1711 int min
, max
, min_above
, max_below
, i
, l
, delta
= 255;
1712 max
= max_below
= 0;
1713 min
= min_above
= 255;
1714 /* Find closest level to level_current */
1715 for (i
= 0; i
< device
->brightness
->count
; i
++) {
1716 l
= device
->brightness
->levels
[i
];
1717 if (abs(l
- level_current
) < abs(delta
)) {
1718 delta
= l
- level_current
;
1723 /* Ajust level_current to closest available level */
1724 level_current
+= delta
;
1725 for (i
= 0; i
< device
->brightness
->count
; i
++) {
1726 l
= device
->brightness
->levels
[i
];
1731 if (l
< min_above
&& l
> level_current
)
1733 if (l
> max_below
&& l
< level_current
)
1738 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
:
1739 return (level_current
< max
) ? min_above
: min
;
1740 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
:
1741 return (level_current
< max
) ? min_above
: max
;
1742 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
:
1743 return (level_current
> min
) ? max_below
: min
;
1744 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
:
1745 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
:
1748 return level_current
;
1753 acpi_video_switch_brightness(struct acpi_video_device
*device
, int event
)
1755 unsigned long long level_current
, level_next
;
1756 if (!device
->brightness
)
1758 acpi_video_device_lcd_get_level_current(device
, &level_current
);
1759 level_next
= acpi_video_get_next_level(device
, level_current
, event
);
1760 acpi_video_device_lcd_set_level(device
, level_next
);
1764 acpi_video_bus_get_devices(struct acpi_video_bus
*video
,
1765 struct acpi_device
*device
)
1768 struct acpi_device
*dev
;
1770 acpi_video_device_enumerate(video
);
1772 list_for_each_entry(dev
, &device
->children
, node
) {
1774 status
= acpi_video_bus_get_one_device(dev
, video
);
1775 if (ACPI_FAILURE(status
)) {
1776 printk(KERN_WARNING PREFIX
1777 "Cant attach device");
1784 static int acpi_video_bus_put_one_device(struct acpi_video_device
*device
)
1787 struct acpi_video_bus
*video
;
1790 if (!device
|| !device
->video
)
1793 video
= device
->video
;
1795 acpi_video_device_remove_fs(device
->dev
);
1797 status
= acpi_remove_notify_handler(device
->dev
->handle
,
1799 acpi_video_device_notify
);
1800 backlight_device_unregister(device
->backlight
);
1802 sysfs_remove_link(&device
->dev
->dev
.kobj
,
1804 sysfs_remove_link(&device
->cdev
->device
.kobj
,
1806 thermal_cooling_device_unregister(device
->cdev
);
1807 device
->cdev
= NULL
;
1809 video_output_unregister(device
->output_dev
);
1814 static int acpi_video_bus_put_devices(struct acpi_video_bus
*video
)
1817 struct acpi_video_device
*dev
, *next
;
1819 mutex_lock(&video
->device_list_lock
);
1821 list_for_each_entry_safe(dev
, next
, &video
->video_device_list
, entry
) {
1823 status
= acpi_video_bus_put_one_device(dev
);
1824 if (ACPI_FAILURE(status
))
1825 printk(KERN_WARNING PREFIX
1826 "hhuuhhuu bug in acpi video driver.\n");
1828 if (dev
->brightness
) {
1829 kfree(dev
->brightness
->levels
);
1830 kfree(dev
->brightness
);
1832 list_del(&dev
->entry
);
1836 mutex_unlock(&video
->device_list_lock
);
1841 /* acpi_video interface */
1843 static int acpi_video_bus_start_devices(struct acpi_video_bus
*video
)
1845 return acpi_video_bus_DOS(video
, 0, 0);
1848 static int acpi_video_bus_stop_devices(struct acpi_video_bus
*video
)
1850 return acpi_video_bus_DOS(video
, 0, 1);
1853 static void acpi_video_bus_notify(acpi_handle handle
, u32 event
, void *data
)
1855 struct acpi_video_bus
*video
= data
;
1856 struct acpi_device
*device
= NULL
;
1857 struct input_dev
*input
;
1863 device
= video
->device
;
1864 input
= video
->input
;
1867 case ACPI_VIDEO_NOTIFY_SWITCH
: /* User requested a switch,
1868 * most likely via hotkey. */
1869 acpi_bus_generate_proc_event(device
, event
, 0);
1870 keycode
= KEY_SWITCHVIDEOMODE
;
1873 case ACPI_VIDEO_NOTIFY_PROBE
: /* User plugged in or removed a video
1875 acpi_video_device_enumerate(video
);
1876 acpi_video_device_rebind(video
);
1877 acpi_bus_generate_proc_event(device
, event
, 0);
1878 keycode
= KEY_SWITCHVIDEOMODE
;
1881 case ACPI_VIDEO_NOTIFY_CYCLE
: /* Cycle Display output hotkey pressed. */
1882 acpi_bus_generate_proc_event(device
, event
, 0);
1883 keycode
= KEY_SWITCHVIDEOMODE
;
1885 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
: /* Next Display output hotkey pressed. */
1886 acpi_bus_generate_proc_event(device
, event
, 0);
1887 keycode
= KEY_VIDEO_NEXT
;
1889 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT
: /* previous Display output hotkey pressed. */
1890 acpi_bus_generate_proc_event(device
, event
, 0);
1891 keycode
= KEY_VIDEO_PREV
;
1895 keycode
= KEY_UNKNOWN
;
1896 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
1897 "Unsupported event [0x%x]\n", event
));
1901 acpi_notifier_call_chain(device
, event
, 0);
1902 input_report_key(input
, keycode
, 1);
1904 input_report_key(input
, keycode
, 0);
1910 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
)
1912 struct acpi_video_device
*video_device
= data
;
1913 struct acpi_device
*device
= NULL
;
1914 struct acpi_video_bus
*bus
;
1915 struct input_dev
*input
;
1921 device
= video_device
->dev
;
1922 bus
= video_device
->video
;
1926 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
: /* Cycle brightness */
1927 if (brightness_switch_enabled
)
1928 acpi_video_switch_brightness(video_device
, event
);
1929 acpi_bus_generate_proc_event(device
, event
, 0);
1930 keycode
= KEY_BRIGHTNESS_CYCLE
;
1932 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
: /* Increase brightness */
1933 if (brightness_switch_enabled
)
1934 acpi_video_switch_brightness(video_device
, event
);
1935 acpi_bus_generate_proc_event(device
, event
, 0);
1936 keycode
= KEY_BRIGHTNESSUP
;
1938 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
: /* Decrease brightness */
1939 if (brightness_switch_enabled
)
1940 acpi_video_switch_brightness(video_device
, event
);
1941 acpi_bus_generate_proc_event(device
, event
, 0);
1942 keycode
= KEY_BRIGHTNESSDOWN
;
1944 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
: /* zero brightnesss */
1945 if (brightness_switch_enabled
)
1946 acpi_video_switch_brightness(video_device
, event
);
1947 acpi_bus_generate_proc_event(device
, event
, 0);
1948 keycode
= KEY_BRIGHTNESS_ZERO
;
1950 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
: /* display device off */
1951 if (brightness_switch_enabled
)
1952 acpi_video_switch_brightness(video_device
, event
);
1953 acpi_bus_generate_proc_event(device
, event
, 0);
1954 keycode
= KEY_DISPLAY_OFF
;
1957 keycode
= KEY_UNKNOWN
;
1958 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
1959 "Unsupported event [0x%x]\n", event
));
1963 acpi_notifier_call_chain(device
, event
, 0);
1964 input_report_key(input
, keycode
, 1);
1966 input_report_key(input
, keycode
, 0);
1972 static int instance
;
1973 static int acpi_video_resume(struct acpi_device
*device
)
1975 struct acpi_video_bus
*video
;
1976 struct acpi_video_device
*video_device
;
1979 if (!device
|| !acpi_driver_data(device
))
1982 video
= acpi_driver_data(device
);
1984 for (i
= 0; i
< video
->attached_count
; i
++) {
1985 video_device
= video
->attached_array
[i
].bind_info
;
1986 if (video_device
&& video_device
->backlight
)
1987 acpi_video_set_brightness(video_device
->backlight
);
1992 static int acpi_video_bus_add(struct acpi_device
*device
)
1995 struct acpi_video_bus
*video
;
1996 struct input_dev
*input
;
1999 video
= kzalloc(sizeof(struct acpi_video_bus
), GFP_KERNEL
);
2003 /* a hack to fix the duplicate name "VID" problem on T61 */
2004 if (!strcmp(device
->pnp
.bus_id
, "VID")) {
2006 device
->pnp
.bus_id
[3] = '0' + instance
;
2010 video
->device
= device
;
2011 strcpy(acpi_device_name(device
), ACPI_VIDEO_BUS_NAME
);
2012 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
2013 device
->driver_data
= video
;
2015 acpi_video_bus_find_cap(video
);
2016 error
= acpi_video_bus_check(video
);
2018 goto err_free_video
;
2020 error
= acpi_video_bus_add_fs(device
);
2022 goto err_free_video
;
2024 mutex_init(&video
->device_list_lock
);
2025 INIT_LIST_HEAD(&video
->video_device_list
);
2027 acpi_video_bus_get_devices(video
, device
);
2028 acpi_video_bus_start_devices(video
);
2030 status
= acpi_install_notify_handler(device
->handle
,
2032 acpi_video_bus_notify
, video
);
2033 if (ACPI_FAILURE(status
)) {
2034 printk(KERN_ERR PREFIX
2035 "Error installing notify handler\n");
2037 goto err_stop_video
;
2040 video
->input
= input
= input_allocate_device();
2043 goto err_uninstall_notify
;
2046 snprintf(video
->phys
, sizeof(video
->phys
),
2047 "%s/video/input0", acpi_device_hid(video
->device
));
2049 input
->name
= acpi_device_name(video
->device
);
2050 input
->phys
= video
->phys
;
2051 input
->id
.bustype
= BUS_HOST
;
2052 input
->id
.product
= 0x06;
2053 input
->dev
.parent
= &device
->dev
;
2054 input
->evbit
[0] = BIT(EV_KEY
);
2055 set_bit(KEY_SWITCHVIDEOMODE
, input
->keybit
);
2056 set_bit(KEY_VIDEO_NEXT
, input
->keybit
);
2057 set_bit(KEY_VIDEO_PREV
, input
->keybit
);
2058 set_bit(KEY_BRIGHTNESS_CYCLE
, input
->keybit
);
2059 set_bit(KEY_BRIGHTNESSUP
, input
->keybit
);
2060 set_bit(KEY_BRIGHTNESSDOWN
, input
->keybit
);
2061 set_bit(KEY_BRIGHTNESS_ZERO
, input
->keybit
);
2062 set_bit(KEY_DISPLAY_OFF
, input
->keybit
);
2063 set_bit(KEY_UNKNOWN
, input
->keybit
);
2065 error
= input_register_device(input
);
2067 goto err_free_input_dev
;
2069 printk(KERN_INFO PREFIX
"%s [%s] (multi-head: %s rom: %s post: %s)\n",
2070 ACPI_VIDEO_DEVICE_NAME
, acpi_device_bid(device
),
2071 video
->flags
.multihead
? "yes" : "no",
2072 video
->flags
.rom
? "yes" : "no",
2073 video
->flags
.post
? "yes" : "no");
2078 input_free_device(input
);
2079 err_uninstall_notify
:
2080 acpi_remove_notify_handler(device
->handle
, ACPI_DEVICE_NOTIFY
,
2081 acpi_video_bus_notify
);
2083 acpi_video_bus_stop_devices(video
);
2084 acpi_video_bus_put_devices(video
);
2085 kfree(video
->attached_array
);
2086 acpi_video_bus_remove_fs(device
);
2089 device
->driver_data
= NULL
;
2094 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
)
2096 acpi_status status
= 0;
2097 struct acpi_video_bus
*video
= NULL
;
2100 if (!device
|| !acpi_driver_data(device
))
2103 video
= acpi_driver_data(device
);
2105 acpi_video_bus_stop_devices(video
);
2107 status
= acpi_remove_notify_handler(video
->device
->handle
,
2109 acpi_video_bus_notify
);
2111 acpi_video_bus_put_devices(video
);
2112 acpi_video_bus_remove_fs(device
);
2114 input_unregister_device(video
->input
);
2115 kfree(video
->attached_array
);
2121 static int __init
acpi_video_init(void)
2125 acpi_video_dir
= proc_mkdir(ACPI_VIDEO_CLASS
, acpi_root_dir
);
2126 if (!acpi_video_dir
)
2128 acpi_video_dir
->owner
= THIS_MODULE
;
2130 result
= acpi_bus_register_driver(&acpi_video_bus
);
2132 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
2139 static void __exit
acpi_video_exit(void)
2142 acpi_bus_unregister_driver(&acpi_video_bus
);
2144 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
2149 module_init(acpi_video_init
);
2150 module_exit(acpi_video_exit
);