2 * video.c - ACPI Video Driver ($Revision:$)
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <linux/sort.h>
40 #include <linux/pci.h>
41 #include <linux/pci_ids.h>
42 #include <asm/uaccess.h>
43 #include <linux/dmi.h>
44 #include <acpi/acpi_bus.h>
45 #include <acpi/acpi_drivers.h>
47 #define PREFIX "ACPI: "
49 #define ACPI_VIDEO_CLASS "video"
50 #define ACPI_VIDEO_BUS_NAME "Video Bus"
51 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
52 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
53 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
54 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
55 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
56 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
58 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
59 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
60 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
61 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
62 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
64 #define MAX_NAME_LEN 20
66 #define ACPI_VIDEO_DISPLAY_CRT 1
67 #define ACPI_VIDEO_DISPLAY_TV 2
68 #define ACPI_VIDEO_DISPLAY_DVI 3
69 #define ACPI_VIDEO_DISPLAY_LCD 4
71 #define _COMPONENT ACPI_VIDEO_COMPONENT
72 ACPI_MODULE_NAME("video");
74 MODULE_AUTHOR("Bruno Ducrot");
75 MODULE_DESCRIPTION("ACPI Video Driver");
76 MODULE_LICENSE("GPL");
78 static int brightness_switch_enabled
= 1;
79 module_param(brightness_switch_enabled
, bool, 0644);
82 * By default, we don't allow duplicate ACPI video bus devices
83 * under the same VGA controller
85 static int allow_duplicates
;
86 module_param(allow_duplicates
, bool, 0644);
88 static int register_count
= 0;
89 static int acpi_video_bus_add(struct acpi_device
*device
);
90 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
);
91 static int acpi_video_resume(struct acpi_device
*device
);
92 static void acpi_video_bus_notify(struct acpi_device
*device
, u32 event
);
94 static const struct acpi_device_id video_device_ids
[] = {
98 MODULE_DEVICE_TABLE(acpi
, video_device_ids
);
100 static struct acpi_driver acpi_video_bus
= {
102 .class = ACPI_VIDEO_CLASS
,
103 .ids
= video_device_ids
,
105 .add
= acpi_video_bus_add
,
106 .remove
= acpi_video_bus_remove
,
107 .resume
= acpi_video_resume
,
108 .notify
= acpi_video_bus_notify
,
112 struct acpi_video_bus_flags
{
113 u8 multihead
:1; /* can switch video heads */
114 u8 rom
:1; /* can retrieve a video rom */
115 u8 post
:1; /* can configure the head to */
119 struct acpi_video_bus_cap
{
120 u8 _DOS
:1; /*Enable/Disable output switching */
121 u8 _DOD
:1; /*Enumerate all devices attached to display adapter */
122 u8 _ROM
:1; /*Get ROM Data */
123 u8 _GPD
:1; /*Get POST Device */
124 u8 _SPD
:1; /*Set POST Device */
125 u8 _VPO
:1; /*Video POST Options */
129 struct acpi_video_device_attrib
{
130 u32 display_index
:4; /* A zero-based instance of the Display */
131 u32 display_port_attachment
:4; /*This field differentiates the display type */
132 u32 display_type
:4; /*Describe the specific type in use */
133 u32 vendor_specific
:4; /*Chipset Vendor Specific */
134 u32 bios_can_detect
:1; /*BIOS can detect the device */
135 u32 depend_on_vga
:1; /*Non-VGA output device whose power is related to
137 u32 pipe_id
:3; /*For VGA multiple-head devices. */
138 u32 reserved
:10; /*Must be 0 */
139 u32 device_id_scheme
:1; /*Device ID Scheme */
142 struct acpi_video_enumerated_device
{
145 struct acpi_video_device_attrib attrib
;
147 struct acpi_video_device
*bind_info
;
150 struct acpi_video_bus
{
151 struct acpi_device
*device
;
153 struct acpi_video_enumerated_device
*attached_array
;
155 struct acpi_video_bus_cap cap
;
156 struct acpi_video_bus_flags flags
;
157 struct list_head video_device_list
;
158 struct mutex device_list_lock
; /* protects video_device_list */
159 struct proc_dir_entry
*dir
;
160 struct input_dev
*input
;
161 char phys
[32]; /* for input device */
164 struct acpi_video_device_flags
{
174 struct acpi_video_device_cap
{
175 u8 _ADR
:1; /*Return the unique ID */
176 u8 _BCL
:1; /*Query list of brightness control levels supported */
177 u8 _BCM
:1; /*Set the brightness level */
178 u8 _BQC
:1; /* Get current brightness level */
179 u8 _BCQ
:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
180 u8 _DDC
:1; /*Return the EDID for this device */
181 u8 _DCS
:1; /*Return status of output device */
182 u8 _DGS
:1; /*Query graphics state */
183 u8 _DSS
:1; /*Device state set */
186 struct acpi_video_brightness_flags
{
187 u8 _BCL_no_ac_battery_levels
:1; /* no AC/Battery levels in _BCL */
188 u8 _BCL_reversed
:1; /* _BCL package is in a reversed order*/
189 u8 _BCL_use_index
:1; /* levels in _BCL are index values */
190 u8 _BCM_use_index
:1; /* input of _BCM is an index value */
191 u8 _BQC_use_index
:1; /* _BQC returns an index value */
194 struct acpi_video_device_brightness
{
198 struct acpi_video_brightness_flags flags
;
201 struct acpi_video_device
{
202 unsigned long device_id
;
203 struct acpi_video_device_flags flags
;
204 struct acpi_video_device_cap cap
;
205 struct list_head entry
;
206 struct acpi_video_bus
*video
;
207 struct acpi_device
*dev
;
208 struct acpi_video_device_brightness
*brightness
;
209 struct backlight_device
*backlight
;
210 struct thermal_cooling_device
*cooling_dev
;
211 struct output_device
*output_dev
;
215 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
);
216 static const struct file_operations acpi_video_bus_info_fops
= {
217 .owner
= THIS_MODULE
,
218 .open
= acpi_video_bus_info_open_fs
,
221 .release
= single_release
,
224 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
);
225 static const struct file_operations acpi_video_bus_ROM_fops
= {
226 .owner
= THIS_MODULE
,
227 .open
= acpi_video_bus_ROM_open_fs
,
230 .release
= single_release
,
233 static int acpi_video_bus_POST_info_open_fs(struct inode
*inode
,
235 static const struct file_operations acpi_video_bus_POST_info_fops
= {
236 .owner
= THIS_MODULE
,
237 .open
= acpi_video_bus_POST_info_open_fs
,
240 .release
= single_release
,
243 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
);
244 static ssize_t
acpi_video_bus_write_POST(struct file
*file
,
245 const char __user
*buffer
, size_t count
, loff_t
*data
);
246 static const struct file_operations acpi_video_bus_POST_fops
= {
247 .owner
= THIS_MODULE
,
248 .open
= acpi_video_bus_POST_open_fs
,
250 .write
= acpi_video_bus_write_POST
,
252 .release
= single_release
,
255 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
);
256 static ssize_t
acpi_video_bus_write_DOS(struct file
*file
,
257 const char __user
*buffer
, size_t count
, loff_t
*data
);
258 static const struct file_operations acpi_video_bus_DOS_fops
= {
259 .owner
= THIS_MODULE
,
260 .open
= acpi_video_bus_DOS_open_fs
,
262 .write
= acpi_video_bus_write_DOS
,
264 .release
= single_release
,
268 static int acpi_video_device_info_open_fs(struct inode
*inode
,
270 static const struct file_operations acpi_video_device_info_fops
= {
271 .owner
= THIS_MODULE
,
272 .open
= acpi_video_device_info_open_fs
,
275 .release
= single_release
,
278 static int acpi_video_device_state_open_fs(struct inode
*inode
,
280 static ssize_t
acpi_video_device_write_state(struct file
*file
,
281 const char __user
*buffer
, size_t count
, loff_t
*data
);
282 static const struct file_operations acpi_video_device_state_fops
= {
283 .owner
= THIS_MODULE
,
284 .open
= acpi_video_device_state_open_fs
,
286 .write
= acpi_video_device_write_state
,
288 .release
= single_release
,
291 static int acpi_video_device_brightness_open_fs(struct inode
*inode
,
293 static ssize_t
acpi_video_device_write_brightness(struct file
*file
,
294 const char __user
*buffer
, size_t count
, loff_t
*data
);
295 static const struct file_operations acpi_video_device_brightness_fops
= {
296 .owner
= THIS_MODULE
,
297 .open
= acpi_video_device_brightness_open_fs
,
299 .write
= acpi_video_device_write_brightness
,
301 .release
= single_release
,
304 static int acpi_video_device_EDID_open_fs(struct inode
*inode
,
306 static const struct file_operations acpi_video_device_EDID_fops
= {
307 .owner
= THIS_MODULE
,
308 .open
= acpi_video_device_EDID_open_fs
,
311 .release
= single_release
,
314 static const char device_decode
[][30] = {
315 "motherboard VGA device",
321 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
);
322 static void acpi_video_device_rebind(struct acpi_video_bus
*video
);
323 static void acpi_video_device_bind(struct acpi_video_bus
*video
,
324 struct acpi_video_device
*device
);
325 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
);
326 static int acpi_video_device_lcd_set_level(struct acpi_video_device
*device
,
328 static int acpi_video_device_lcd_get_level_current(
329 struct acpi_video_device
*device
,
330 unsigned long long *level
);
331 static int acpi_video_get_next_level(struct acpi_video_device
*device
,
332 u32 level_current
, u32 event
);
333 static int acpi_video_switch_brightness(struct acpi_video_device
*device
,
335 static int acpi_video_device_get_state(struct acpi_video_device
*device
,
336 unsigned long long *state
);
337 static int acpi_video_output_get(struct output_device
*od
);
338 static int acpi_video_device_set_state(struct acpi_video_device
*device
, int state
);
340 /*backlight device sysfs support*/
341 static int acpi_video_get_brightness(struct backlight_device
*bd
)
343 unsigned long long cur_level
;
345 struct acpi_video_device
*vd
=
346 (struct acpi_video_device
*)bl_get_data(bd
);
348 if (acpi_video_device_lcd_get_level_current(vd
, &cur_level
))
350 for (i
= 2; i
< vd
->brightness
->count
; i
++) {
351 if (vd
->brightness
->levels
[i
] == cur_level
)
352 /* The first two entries are special - see page 575
353 of the ACPI spec 3.0 */
359 static int acpi_video_set_brightness(struct backlight_device
*bd
)
361 int request_level
= bd
->props
.brightness
+ 2;
362 struct acpi_video_device
*vd
=
363 (struct acpi_video_device
*)bl_get_data(bd
);
365 return acpi_video_device_lcd_set_level(vd
,
366 vd
->brightness
->levels
[request_level
]);
369 static struct backlight_ops acpi_backlight_ops
= {
370 .get_brightness
= acpi_video_get_brightness
,
371 .update_status
= acpi_video_set_brightness
,
374 /*video output device sysfs support*/
375 static int acpi_video_output_get(struct output_device
*od
)
377 unsigned long long state
;
378 struct acpi_video_device
*vd
=
379 (struct acpi_video_device
*)dev_get_drvdata(&od
->dev
);
380 acpi_video_device_get_state(vd
, &state
);
384 static int acpi_video_output_set(struct output_device
*od
)
386 unsigned long state
= od
->request_state
;
387 struct acpi_video_device
*vd
=
388 (struct acpi_video_device
*)dev_get_drvdata(&od
->dev
);
389 return acpi_video_device_set_state(vd
, state
);
392 static struct output_properties acpi_output_properties
= {
393 .set_state
= acpi_video_output_set
,
394 .get_status
= acpi_video_output_get
,
398 /* thermal cooling device callbacks */
399 static int video_get_max_state(struct thermal_cooling_device
*cooling_dev
, unsigned
402 struct acpi_device
*device
= cooling_dev
->devdata
;
403 struct acpi_video_device
*video
= acpi_driver_data(device
);
405 *state
= video
->brightness
->count
- 3;
409 static int video_get_cur_state(struct thermal_cooling_device
*cooling_dev
, unsigned
412 struct acpi_device
*device
= cooling_dev
->devdata
;
413 struct acpi_video_device
*video
= acpi_driver_data(device
);
414 unsigned long long level
;
417 if (acpi_video_device_lcd_get_level_current(video
, &level
))
419 for (offset
= 2; offset
< video
->brightness
->count
; offset
++)
420 if (level
== video
->brightness
->levels
[offset
]) {
421 *state
= video
->brightness
->count
- offset
- 1;
429 video_set_cur_state(struct thermal_cooling_device
*cooling_dev
, unsigned long state
)
431 struct acpi_device
*device
= cooling_dev
->devdata
;
432 struct acpi_video_device
*video
= acpi_driver_data(device
);
435 if ( state
>= video
->brightness
->count
- 2)
438 state
= video
->brightness
->count
- state
;
439 level
= video
->brightness
->levels
[state
-1];
440 return acpi_video_device_lcd_set_level(video
, level
);
443 static struct thermal_cooling_device_ops video_cooling_ops
= {
444 .get_max_state
= video_get_max_state
,
445 .get_cur_state
= video_get_cur_state
,
446 .set_cur_state
= video_set_cur_state
,
449 /* --------------------------------------------------------------------------
451 -------------------------------------------------------------------------- */
456 acpi_video_device_query(struct acpi_video_device
*device
, unsigned long long *state
)
460 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DGS", NULL
, state
);
466 acpi_video_device_get_state(struct acpi_video_device
*device
,
467 unsigned long long *state
)
471 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DCS", NULL
, state
);
477 acpi_video_device_set_state(struct acpi_video_device
*device
, int state
)
480 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
481 struct acpi_object_list args
= { 1, &arg0
};
482 unsigned long long ret
;
485 arg0
.integer
.value
= state
;
486 status
= acpi_evaluate_integer(device
->dev
->handle
, "_DSS", &args
, &ret
);
492 acpi_video_device_lcd_query_levels(struct acpi_video_device
*device
,
493 union acpi_object
**levels
)
496 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
497 union acpi_object
*obj
;
502 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCL", NULL
, &buffer
);
503 if (!ACPI_SUCCESS(status
))
505 obj
= (union acpi_object
*)buffer
.pointer
;
506 if (!obj
|| (obj
->type
!= ACPI_TYPE_PACKAGE
)) {
507 printk(KERN_ERR PREFIX
"Invalid _BCL data\n");
517 kfree(buffer
.pointer
);
523 acpi_video_device_lcd_set_level(struct acpi_video_device
*device
, int level
)
526 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
527 struct acpi_object_list args
= { 1, &arg0
};
530 arg0
.integer
.value
= level
;
532 status
= acpi_evaluate_object(device
->dev
->handle
, "_BCM",
534 if (ACPI_FAILURE(status
)) {
535 ACPI_ERROR((AE_INFO
, "Evaluating _BCM failed"));
539 device
->brightness
->curr
= level
;
540 for (state
= 2; state
< device
->brightness
->count
; state
++)
541 if (level
== device
->brightness
->levels
[state
]) {
542 if (device
->backlight
)
543 device
->backlight
->props
.brightness
= state
- 2;
547 ACPI_ERROR((AE_INFO
, "Current brightness invalid"));
552 * For some buggy _BQC methods, we need to add a constant value to
553 * the _BQC return value to get the actual current brightness level
556 static int bqc_offset_aml_bug_workaround
;
557 static int __init
video_set_bqc_offset(const struct dmi_system_id
*d
)
559 bqc_offset_aml_bug_workaround
= 9;
563 static struct dmi_system_id video_dmi_table
[] __initdata
= {
565 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
568 .callback
= video_set_bqc_offset
,
569 .ident
= "Acer Aspire 5720",
571 DMI_MATCH(DMI_BOARD_VENDOR
, "Acer"),
572 DMI_MATCH(DMI_PRODUCT_NAME
, "Aspire 5720"),
576 .callback
= video_set_bqc_offset
,
577 .ident
= "Acer Aspire 5710Z",
579 DMI_MATCH(DMI_BOARD_VENDOR
, "Acer"),
580 DMI_MATCH(DMI_PRODUCT_NAME
, "Aspire 5710Z"),
584 .callback
= video_set_bqc_offset
,
585 .ident
= "eMachines E510",
587 DMI_MATCH(DMI_BOARD_VENDOR
, "EMACHINES"),
588 DMI_MATCH(DMI_PRODUCT_NAME
, "eMachines E510"),
592 .callback
= video_set_bqc_offset
,
593 .ident
= "Acer Aspire 5315",
595 DMI_MATCH(DMI_BOARD_VENDOR
, "Acer"),
596 DMI_MATCH(DMI_PRODUCT_NAME
, "Aspire 5315"),
600 .callback
= video_set_bqc_offset
,
601 .ident
= "Acer Aspire 7720",
603 DMI_MATCH(DMI_BOARD_VENDOR
, "Acer"),
604 DMI_MATCH(DMI_PRODUCT_NAME
, "Aspire 7720"),
611 acpi_video_device_lcd_get_level_current(struct acpi_video_device
*device
,
612 unsigned long long *level
)
614 acpi_status status
= AE_OK
;
617 if (device
->cap
._BQC
|| device
->cap
._BCQ
) {
618 char *buf
= device
->cap
._BQC
? "_BQC" : "_BCQ";
620 status
= acpi_evaluate_integer(device
->dev
->handle
, buf
,
622 if (ACPI_SUCCESS(status
)) {
623 if (device
->brightness
->flags
._BQC_use_index
) {
624 if (device
->brightness
->flags
._BCL_reversed
)
625 *level
= device
->brightness
->count
627 *level
= device
->brightness
->levels
[*level
+ 2];
630 *level
+= bqc_offset_aml_bug_workaround
;
631 for (i
= 2; i
< device
->brightness
->count
; i
++)
632 if (device
->brightness
->levels
[i
] == *level
) {
633 device
->brightness
->curr
= *level
;
636 /* BQC returned an invalid level. Stop using it. */
637 ACPI_WARNING((AE_INFO
, "%s returned an invalid level",
639 device
->cap
._BQC
= device
->cap
._BCQ
= 0;
642 * should we return an error or ignore this failure?
643 * dev->brightness->curr is a cached value which stores
644 * the correct current backlight level in most cases.
645 * ACPI video backlight still works w/ buggy _BQC.
646 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
648 ACPI_WARNING((AE_INFO
, "Evaluating %s failed", buf
));
649 device
->cap
._BQC
= device
->cap
._BCQ
= 0;
653 *level
= device
->brightness
->curr
;
658 acpi_video_device_EDID(struct acpi_video_device
*device
,
659 union acpi_object
**edid
, ssize_t length
)
662 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
663 union acpi_object
*obj
;
664 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
665 struct acpi_object_list args
= { 1, &arg0
};
673 arg0
.integer
.value
= 1;
674 else if (length
== 256)
675 arg0
.integer
.value
= 2;
679 status
= acpi_evaluate_object(device
->dev
->handle
, "_DDC", &args
, &buffer
);
680 if (ACPI_FAILURE(status
))
683 obj
= buffer
.pointer
;
685 if (obj
&& obj
->type
== ACPI_TYPE_BUFFER
)
688 printk(KERN_ERR PREFIX
"Invalid _DDC data\n");
699 acpi_video_bus_set_POST(struct acpi_video_bus
*video
, unsigned long option
)
702 unsigned long long tmp
;
703 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
704 struct acpi_object_list args
= { 1, &arg0
};
707 arg0
.integer
.value
= option
;
709 status
= acpi_evaluate_integer(video
->device
->handle
, "_SPD", &args
, &tmp
);
710 if (ACPI_SUCCESS(status
))
711 status
= tmp
? (-EINVAL
) : (AE_OK
);
717 acpi_video_bus_get_POST(struct acpi_video_bus
*video
, unsigned long long *id
)
721 status
= acpi_evaluate_integer(video
->device
->handle
, "_GPD", NULL
, id
);
727 acpi_video_bus_POST_options(struct acpi_video_bus
*video
,
728 unsigned long long *options
)
732 status
= acpi_evaluate_integer(video
->device
->handle
, "_VPO", NULL
, options
);
740 * video : video bus device pointer
742 * 0. The system BIOS should NOT automatically switch(toggle)
743 * the active display output.
744 * 1. The system BIOS should automatically switch (toggle) the
745 * active display output. No switch event.
746 * 2. The _DGS value should be locked.
747 * 3. The system BIOS should not automatically switch (toggle) the
748 * active display output, but instead generate the display switch
751 * 0. The system BIOS should automatically control the brightness level
752 * of the LCD when the power changes from AC to DC
753 * 1. The system BIOS should NOT automatically control the brightness
754 * level of the LCD when the power changes from AC to DC.
760 acpi_video_bus_DOS(struct acpi_video_bus
*video
, int bios_flag
, int lcd_flag
)
762 acpi_integer status
= 0;
763 union acpi_object arg0
= { ACPI_TYPE_INTEGER
};
764 struct acpi_object_list args
= { 1, &arg0
};
767 if (bios_flag
< 0 || bios_flag
> 3 || lcd_flag
< 0 || lcd_flag
> 1) {
771 arg0
.integer
.value
= (lcd_flag
<< 2) | bios_flag
;
772 video
->dos_setting
= arg0
.integer
.value
;
773 acpi_evaluate_object(video
->device
->handle
, "_DOS", &args
, NULL
);
780 * Simple comparison function used to sort backlight levels.
784 acpi_video_cmp_level(const void *a
, const void *b
)
786 return *(int *)a
- *(int *)b
;
791 * device : video output device (LCD, CRT, ..)
794 * Maximum brightness level
796 * Allocate and initialize device->brightness.
800 acpi_video_init_brightness(struct acpi_video_device
*device
)
802 union acpi_object
*obj
= NULL
;
803 int i
, max_level
= 0, count
= 0, level_ac_battery
= 0;
804 unsigned long long level
, level_old
;
805 union acpi_object
*o
;
806 struct acpi_video_device_brightness
*br
= NULL
;
807 int result
= -EINVAL
;
809 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device
, &obj
))) {
810 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Could not query available "
811 "LCD brightness level\n"));
815 if (obj
->package
.count
< 2)
818 br
= kzalloc(sizeof(*br
), GFP_KERNEL
);
820 printk(KERN_ERR
"can't allocate memory\n");
825 br
->levels
= kmalloc((obj
->package
.count
+ 2) * sizeof *(br
->levels
),
832 for (i
= 0; i
< obj
->package
.count
; i
++) {
833 o
= (union acpi_object
*)&obj
->package
.elements
[i
];
834 if (o
->type
!= ACPI_TYPE_INTEGER
) {
835 printk(KERN_ERR PREFIX
"Invalid data\n");
838 br
->levels
[count
] = (u32
) o
->integer
.value
;
840 if (br
->levels
[count
] > max_level
)
841 max_level
= br
->levels
[count
];
846 * some buggy BIOS don't export the levels
847 * when machine is on AC/Battery in _BCL package.
848 * In this case, the first two elements in _BCL packages
849 * are also supported brightness levels that OS should take care of.
851 for (i
= 2; i
< count
; i
++) {
852 if (br
->levels
[i
] == br
->levels
[0])
854 if (br
->levels
[i
] == br
->levels
[1])
858 if (level_ac_battery
< 2) {
859 level_ac_battery
= 2 - level_ac_battery
;
860 br
->flags
._BCL_no_ac_battery_levels
= 1;
861 for (i
= (count
- 1 + level_ac_battery
); i
>= 2; i
--)
862 br
->levels
[i
] = br
->levels
[i
- level_ac_battery
];
863 count
+= level_ac_battery
;
864 } else if (level_ac_battery
> 2)
865 ACPI_ERROR((AE_INFO
, "Too many duplicates in _BCL package\n"));
867 /* Check if the _BCL package is in a reversed order */
868 if (max_level
== br
->levels
[2]) {
869 br
->flags
._BCL_reversed
= 1;
870 sort(&br
->levels
[2], count
- 2, sizeof(br
->levels
[2]),
871 acpi_video_cmp_level
, NULL
);
872 } else if (max_level
!= br
->levels
[count
- 1])
874 "Found unordered _BCL package\n"));
877 device
->brightness
= br
;
879 /* Check the input/output of _BQC/_BCL/_BCM */
880 if ((max_level
< 100) && (max_level
<= (count
- 2)))
881 br
->flags
._BCL_use_index
= 1;
884 * _BCM is always consistent with _BCL,
885 * at least for all the laptops we have ever seen.
887 br
->flags
._BCM_use_index
= br
->flags
._BCL_use_index
;
889 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
890 br
->curr
= level
= max_level
;
892 if (!device
->cap
._BQC
)
895 result
= acpi_video_device_lcd_get_level_current(device
, &level_old
);
897 goto out_free_levels
;
900 * Set the level to maximum and check if _BQC uses indexed value
902 result
= acpi_video_device_lcd_set_level(device
, max_level
);
904 goto out_free_levels
;
906 result
= acpi_video_device_lcd_get_level_current(device
, &level
);
908 goto out_free_levels
;
910 br
->flags
._BQC_use_index
= (level
== max_level
? 0 : 1);
912 if (!br
->flags
._BQC_use_index
) {
914 * Set the backlight to the initial state.
915 * On some buggy laptops, _BQC returns an uninitialized value
916 * when invoked for the first time, i.e. level_old is invalid.
917 * set the backlight to max_level in this case
919 for (i
= 2; i
< br
->count
; i
++)
920 if (level_old
== br
->levels
[i
])
925 if (br
->flags
._BCL_reversed
)
926 level_old
= (br
->count
- 1) - level_old
;
927 level
= br
->levels
[level_old
];
930 result
= acpi_video_device_lcd_set_level(device
, level
);
932 goto out_free_levels
;
934 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
935 "found %d brightness levels\n", count
- 2));
944 device
->brightness
= NULL
;
951 * device : video output device (LCD, CRT, ..)
956 * Find out all required AML methods defined under the output
960 static void acpi_video_device_find_cap(struct acpi_video_device
*device
)
962 acpi_handle h_dummy1
;
964 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_ADR", &h_dummy1
))) {
965 device
->cap
._ADR
= 1;
967 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCL", &h_dummy1
))) {
968 device
->cap
._BCL
= 1;
970 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCM", &h_dummy1
))) {
971 device
->cap
._BCM
= 1;
973 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
,"_BQC",&h_dummy1
)))
974 device
->cap
._BQC
= 1;
975 else if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_BCQ",
977 printk(KERN_WARNING FW_BUG
"_BCQ is used instead of _BQC\n");
978 device
->cap
._BCQ
= 1;
981 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DDC", &h_dummy1
))) {
982 device
->cap
._DDC
= 1;
984 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DCS", &h_dummy1
))) {
985 device
->cap
._DCS
= 1;
987 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DGS", &h_dummy1
))) {
988 device
->cap
._DGS
= 1;
990 if (ACPI_SUCCESS(acpi_get_handle(device
->dev
->handle
, "_DSS", &h_dummy1
))) {
991 device
->cap
._DSS
= 1;
994 if (acpi_video_backlight_support()) {
996 static int count
= 0;
999 result
= acpi_video_init_brightness(device
);
1002 name
= kzalloc(MAX_NAME_LEN
, GFP_KERNEL
);
1006 sprintf(name
, "acpi_video%d", count
++);
1007 device
->backlight
= backlight_device_register(name
,
1008 NULL
, device
, &acpi_backlight_ops
);
1010 if (IS_ERR(device
->backlight
))
1012 device
->backlight
->props
.max_brightness
= device
->brightness
->count
-3;
1014 result
= sysfs_create_link(&device
->backlight
->dev
.kobj
,
1015 &device
->dev
->dev
.kobj
, "device");
1017 printk(KERN_ERR PREFIX
"Create sysfs link\n");
1019 device
->cooling_dev
= thermal_cooling_device_register("LCD",
1020 device
->dev
, &video_cooling_ops
);
1021 if (IS_ERR(device
->cooling_dev
)) {
1023 * Set cooling_dev to NULL so we don't crash trying to
1025 * Also, why the hell we are returning early and
1026 * not attempt to register video output if cooling
1027 * device registration failed?
1030 device
->cooling_dev
= NULL
;
1034 dev_info(&device
->dev
->dev
, "registered as cooling_device%d\n",
1035 device
->cooling_dev
->id
);
1036 result
= sysfs_create_link(&device
->dev
->dev
.kobj
,
1037 &device
->cooling_dev
->device
.kobj
,
1040 printk(KERN_ERR PREFIX
"Create sysfs link\n");
1041 result
= sysfs_create_link(&device
->cooling_dev
->device
.kobj
,
1042 &device
->dev
->dev
.kobj
, "device");
1044 printk(KERN_ERR PREFIX
"Create sysfs link\n");
1048 if (acpi_video_display_switch_support()) {
1050 if (device
->cap
._DCS
&& device
->cap
._DSS
) {
1053 name
= kzalloc(MAX_NAME_LEN
, GFP_KERNEL
);
1056 sprintf(name
, "acpi_video%d", count
++);
1057 device
->output_dev
= video_output_register(name
,
1058 NULL
, device
, &acpi_output_properties
);
1066 * device : video output device (VGA)
1071 * Find out all required AML methods defined under the video bus device.
1074 static void acpi_video_bus_find_cap(struct acpi_video_bus
*video
)
1076 acpi_handle h_dummy1
;
1078 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOS", &h_dummy1
))) {
1079 video
->cap
._DOS
= 1;
1081 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_DOD", &h_dummy1
))) {
1082 video
->cap
._DOD
= 1;
1084 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_ROM", &h_dummy1
))) {
1085 video
->cap
._ROM
= 1;
1087 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_GPD", &h_dummy1
))) {
1088 video
->cap
._GPD
= 1;
1090 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_SPD", &h_dummy1
))) {
1091 video
->cap
._SPD
= 1;
1093 if (ACPI_SUCCESS(acpi_get_handle(video
->device
->handle
, "_VPO", &h_dummy1
))) {
1094 video
->cap
._VPO
= 1;
1099 * Check whether the video bus device has required AML method to
1100 * support the desired features
1103 static int acpi_video_bus_check(struct acpi_video_bus
*video
)
1105 acpi_status status
= -ENOENT
;
1106 struct pci_dev
*dev
;
1111 dev
= acpi_get_pci_dev(video
->device
->handle
);
1116 /* Since there is no HID, CID and so on for VGA driver, we have
1117 * to check well known required nodes.
1120 /* Does this device support video switching? */
1121 if (video
->cap
._DOS
|| video
->cap
._DOD
) {
1122 if (!video
->cap
._DOS
) {
1123 printk(KERN_WARNING FW_BUG
1124 "ACPI(%s) defines _DOD but not _DOS\n",
1125 acpi_device_bid(video
->device
));
1127 video
->flags
.multihead
= 1;
1131 /* Does this device support retrieving a video ROM? */
1132 if (video
->cap
._ROM
) {
1133 video
->flags
.rom
= 1;
1137 /* Does this device support configuring which video device to POST? */
1138 if (video
->cap
._GPD
&& video
->cap
._SPD
&& video
->cap
._VPO
) {
1139 video
->flags
.post
= 1;
1146 /* --------------------------------------------------------------------------
1147 FS Interface (/proc)
1148 -------------------------------------------------------------------------- */
1150 static struct proc_dir_entry
*acpi_video_dir
;
1154 static int acpi_video_device_info_seq_show(struct seq_file
*seq
, void *offset
)
1156 struct acpi_video_device
*dev
= seq
->private;
1162 seq_printf(seq
, "device_id: 0x%04x\n", (u32
) dev
->device_id
);
1163 seq_printf(seq
, "type: ");
1165 seq_printf(seq
, "CRT\n");
1166 else if (dev
->flags
.lcd
)
1167 seq_printf(seq
, "LCD\n");
1168 else if (dev
->flags
.tvout
)
1169 seq_printf(seq
, "TVOUT\n");
1170 else if (dev
->flags
.dvi
)
1171 seq_printf(seq
, "DVI\n");
1173 seq_printf(seq
, "UNKNOWN\n");
1175 seq_printf(seq
, "known by bios: %s\n", dev
->flags
.bios
? "yes" : "no");
1182 acpi_video_device_info_open_fs(struct inode
*inode
, struct file
*file
)
1184 return single_open(file
, acpi_video_device_info_seq_show
,
1188 static int acpi_video_device_state_seq_show(struct seq_file
*seq
, void *offset
)
1191 struct acpi_video_device
*dev
= seq
->private;
1192 unsigned long long state
;
1198 status
= acpi_video_device_get_state(dev
, &state
);
1199 seq_printf(seq
, "state: ");
1200 if (ACPI_SUCCESS(status
))
1201 seq_printf(seq
, "0x%02llx\n", state
);
1203 seq_printf(seq
, "<not supported>\n");
1205 status
= acpi_video_device_query(dev
, &state
);
1206 seq_printf(seq
, "query: ");
1207 if (ACPI_SUCCESS(status
))
1208 seq_printf(seq
, "0x%02llx\n", state
);
1210 seq_printf(seq
, "<not supported>\n");
1217 acpi_video_device_state_open_fs(struct inode
*inode
, struct file
*file
)
1219 return single_open(file
, acpi_video_device_state_seq_show
,
1224 acpi_video_device_write_state(struct file
*file
,
1225 const char __user
* buffer
,
1226 size_t count
, loff_t
* data
)
1229 struct seq_file
*m
= file
->private_data
;
1230 struct acpi_video_device
*dev
= m
->private;
1231 char str
[12] = { 0 };
1235 if (!dev
|| count
>= sizeof(str
))
1238 if (copy_from_user(str
, buffer
, count
))
1242 state
= simple_strtoul(str
, NULL
, 0);
1243 state
&= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1245 status
= acpi_video_device_set_state(dev
, state
);
1254 acpi_video_device_brightness_seq_show(struct seq_file
*seq
, void *offset
)
1256 struct acpi_video_device
*dev
= seq
->private;
1260 if (!dev
|| !dev
->brightness
) {
1261 seq_printf(seq
, "<not supported>\n");
1265 seq_printf(seq
, "levels: ");
1266 for (i
= 2; i
< dev
->brightness
->count
; i
++)
1267 seq_printf(seq
, " %d", dev
->brightness
->levels
[i
]);
1268 seq_printf(seq
, "\ncurrent: %d\n", dev
->brightness
->curr
);
1274 acpi_video_device_brightness_open_fs(struct inode
*inode
, struct file
*file
)
1276 return single_open(file
, acpi_video_device_brightness_seq_show
,
1281 acpi_video_device_write_brightness(struct file
*file
,
1282 const char __user
* buffer
,
1283 size_t count
, loff_t
* data
)
1285 struct seq_file
*m
= file
->private_data
;
1286 struct acpi_video_device
*dev
= m
->private;
1287 char str
[5] = { 0 };
1288 unsigned int level
= 0;
1292 if (!dev
|| !dev
->brightness
|| count
>= sizeof(str
))
1295 if (copy_from_user(str
, buffer
, count
))
1299 level
= simple_strtoul(str
, NULL
, 0);
1304 /* validate through the list of available levels */
1305 for (i
= 2; i
< dev
->brightness
->count
; i
++)
1306 if (level
== dev
->brightness
->levels
[i
]) {
1307 if (!acpi_video_device_lcd_set_level(dev
, level
))
1315 static int acpi_video_device_EDID_seq_show(struct seq_file
*seq
, void *offset
)
1317 struct acpi_video_device
*dev
= seq
->private;
1320 union acpi_object
*edid
= NULL
;
1326 status
= acpi_video_device_EDID(dev
, &edid
, 128);
1327 if (ACPI_FAILURE(status
)) {
1328 status
= acpi_video_device_EDID(dev
, &edid
, 256);
1331 if (ACPI_FAILURE(status
)) {
1335 if (edid
&& edid
->type
== ACPI_TYPE_BUFFER
) {
1336 for (i
= 0; i
< edid
->buffer
.length
; i
++)
1337 seq_putc(seq
, edid
->buffer
.pointer
[i
]);
1342 seq_printf(seq
, "<not supported>\n");
1350 acpi_video_device_EDID_open_fs(struct inode
*inode
, struct file
*file
)
1352 return single_open(file
, acpi_video_device_EDID_seq_show
,
1356 static int acpi_video_device_add_fs(struct acpi_device
*device
)
1358 struct proc_dir_entry
*entry
, *device_dir
;
1359 struct acpi_video_device
*vid_dev
;
1361 vid_dev
= acpi_driver_data(device
);
1365 device_dir
= proc_mkdir(acpi_device_bid(device
),
1366 vid_dev
->video
->dir
);
1371 entry
= proc_create_data("info", S_IRUGO
, device_dir
,
1372 &acpi_video_device_info_fops
, acpi_driver_data(device
));
1374 goto err_remove_dir
;
1377 entry
= proc_create_data("state", S_IFREG
| S_IRUGO
| S_IWUSR
,
1379 &acpi_video_device_state_fops
,
1380 acpi_driver_data(device
));
1382 goto err_remove_info
;
1384 /* 'brightness' [R/W] */
1385 entry
= proc_create_data("brightness", S_IFREG
| S_IRUGO
| S_IWUSR
,
1387 &acpi_video_device_brightness_fops
,
1388 acpi_driver_data(device
));
1390 goto err_remove_state
;
1393 entry
= proc_create_data("EDID", S_IRUGO
, device_dir
,
1394 &acpi_video_device_EDID_fops
,
1395 acpi_driver_data(device
));
1397 goto err_remove_brightness
;
1399 acpi_device_dir(device
) = device_dir
;
1403 err_remove_brightness
:
1404 remove_proc_entry("brightness", device_dir
);
1406 remove_proc_entry("state", device_dir
);
1408 remove_proc_entry("info", device_dir
);
1410 remove_proc_entry(acpi_device_bid(device
), vid_dev
->video
->dir
);
1414 static int acpi_video_device_remove_fs(struct acpi_device
*device
)
1416 struct acpi_video_device
*vid_dev
;
1417 struct proc_dir_entry
*device_dir
;
1419 vid_dev
= acpi_driver_data(device
);
1420 if (!vid_dev
|| !vid_dev
->video
|| !vid_dev
->video
->dir
)
1423 device_dir
= acpi_device_dir(device
);
1425 remove_proc_entry("info", device_dir
);
1426 remove_proc_entry("state", device_dir
);
1427 remove_proc_entry("brightness", device_dir
);
1428 remove_proc_entry("EDID", device_dir
);
1429 remove_proc_entry(acpi_device_bid(device
), vid_dev
->video
->dir
);
1430 acpi_device_dir(device
) = NULL
;
1437 static int acpi_video_bus_info_seq_show(struct seq_file
*seq
, void *offset
)
1439 struct acpi_video_bus
*video
= seq
->private;
1445 seq_printf(seq
, "Switching heads: %s\n",
1446 video
->flags
.multihead
? "yes" : "no");
1447 seq_printf(seq
, "Video ROM: %s\n",
1448 video
->flags
.rom
? "yes" : "no");
1449 seq_printf(seq
, "Device to be POSTed on boot: %s\n",
1450 video
->flags
.post
? "yes" : "no");
1456 static int acpi_video_bus_info_open_fs(struct inode
*inode
, struct file
*file
)
1458 return single_open(file
, acpi_video_bus_info_seq_show
,
1462 static int acpi_video_bus_ROM_seq_show(struct seq_file
*seq
, void *offset
)
1464 struct acpi_video_bus
*video
= seq
->private;
1470 printk(KERN_INFO PREFIX
"Please implement %s\n", __func__
);
1471 seq_printf(seq
, "<TODO>\n");
1477 static int acpi_video_bus_ROM_open_fs(struct inode
*inode
, struct file
*file
)
1479 return single_open(file
, acpi_video_bus_ROM_seq_show
, PDE(inode
)->data
);
1482 static int acpi_video_bus_POST_info_seq_show(struct seq_file
*seq
, void *offset
)
1484 struct acpi_video_bus
*video
= seq
->private;
1485 unsigned long long options
;
1492 status
= acpi_video_bus_POST_options(video
, &options
);
1493 if (ACPI_SUCCESS(status
)) {
1494 if (!(options
& 1)) {
1495 printk(KERN_WARNING PREFIX
1496 "The motherboard VGA device is not listed as a possible POST device.\n");
1497 printk(KERN_WARNING PREFIX
1498 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1500 printk(KERN_WARNING
"%llx\n", options
);
1501 seq_printf(seq
, "can POST: <integrated video>");
1503 seq_printf(seq
, " <PCI video>");
1505 seq_printf(seq
, " <AGP video>");
1506 seq_putc(seq
, '\n');
1508 seq_printf(seq
, "<not supported>\n");
1514 acpi_video_bus_POST_info_open_fs(struct inode
*inode
, struct file
*file
)
1516 return single_open(file
, acpi_video_bus_POST_info_seq_show
,
1520 static int acpi_video_bus_POST_seq_show(struct seq_file
*seq
, void *offset
)
1522 struct acpi_video_bus
*video
= seq
->private;
1524 unsigned long long id
;
1530 status
= acpi_video_bus_get_POST(video
, &id
);
1531 if (!ACPI_SUCCESS(status
)) {
1532 seq_printf(seq
, "<not supported>\n");
1535 seq_printf(seq
, "device POSTed is <%s>\n", device_decode
[id
& 3]);
1541 static int acpi_video_bus_DOS_seq_show(struct seq_file
*seq
, void *offset
)
1543 struct acpi_video_bus
*video
= seq
->private;
1546 seq_printf(seq
, "DOS setting: <%d>\n", video
->dos_setting
);
1551 static int acpi_video_bus_POST_open_fs(struct inode
*inode
, struct file
*file
)
1553 return single_open(file
, acpi_video_bus_POST_seq_show
,
1557 static int acpi_video_bus_DOS_open_fs(struct inode
*inode
, struct file
*file
)
1559 return single_open(file
, acpi_video_bus_DOS_seq_show
, PDE(inode
)->data
);
1563 acpi_video_bus_write_POST(struct file
*file
,
1564 const char __user
* buffer
,
1565 size_t count
, loff_t
* data
)
1568 struct seq_file
*m
= file
->private_data
;
1569 struct acpi_video_bus
*video
= m
->private;
1570 char str
[12] = { 0 };
1571 unsigned long long opt
, options
;
1574 if (!video
|| count
>= sizeof(str
))
1577 status
= acpi_video_bus_POST_options(video
, &options
);
1578 if (!ACPI_SUCCESS(status
))
1581 if (copy_from_user(str
, buffer
, count
))
1585 opt
= strtoul(str
, NULL
, 0);
1589 /* just in case an OEM 'forgot' the motherboard... */
1592 if (options
& (1ul << opt
)) {
1593 status
= acpi_video_bus_set_POST(video
, opt
);
1594 if (!ACPI_SUCCESS(status
))
1603 acpi_video_bus_write_DOS(struct file
*file
,
1604 const char __user
* buffer
,
1605 size_t count
, loff_t
* data
)
1608 struct seq_file
*m
= file
->private_data
;
1609 struct acpi_video_bus
*video
= m
->private;
1610 char str
[12] = { 0 };
1614 if (!video
|| count
>= sizeof(str
))
1617 if (copy_from_user(str
, buffer
, count
))
1621 opt
= strtoul(str
, NULL
, 0);
1625 status
= acpi_video_bus_DOS(video
, opt
& 0x3, (opt
& 0x4) >> 2);
1627 if (!ACPI_SUCCESS(status
))
1633 static int acpi_video_bus_add_fs(struct acpi_device
*device
)
1635 struct acpi_video_bus
*video
= acpi_driver_data(device
);
1636 struct proc_dir_entry
*device_dir
;
1637 struct proc_dir_entry
*entry
;
1639 device_dir
= proc_mkdir(acpi_device_bid(device
), acpi_video_dir
);
1644 entry
= proc_create_data("info", S_IRUGO
, device_dir
,
1645 &acpi_video_bus_info_fops
,
1646 acpi_driver_data(device
));
1648 goto err_remove_dir
;
1651 entry
= proc_create_data("ROM", S_IRUGO
, device_dir
,
1652 &acpi_video_bus_ROM_fops
,
1653 acpi_driver_data(device
));
1655 goto err_remove_info
;
1657 /* 'POST_info' [R] */
1658 entry
= proc_create_data("POST_info", S_IRUGO
, device_dir
,
1659 &acpi_video_bus_POST_info_fops
,
1660 acpi_driver_data(device
));
1662 goto err_remove_rom
;
1665 entry
= proc_create_data("POST", S_IFREG
| S_IRUGO
| S_IWUSR
,
1667 &acpi_video_bus_POST_fops
,
1668 acpi_driver_data(device
));
1670 goto err_remove_post_info
;
1673 entry
= proc_create_data("DOS", S_IFREG
| S_IRUGO
| S_IWUSR
,
1675 &acpi_video_bus_DOS_fops
,
1676 acpi_driver_data(device
));
1678 goto err_remove_post
;
1680 video
->dir
= acpi_device_dir(device
) = device_dir
;
1684 remove_proc_entry("POST", device_dir
);
1685 err_remove_post_info
:
1686 remove_proc_entry("POST_info", device_dir
);
1688 remove_proc_entry("ROM", device_dir
);
1690 remove_proc_entry("info", device_dir
);
1692 remove_proc_entry(acpi_device_bid(device
), acpi_video_dir
);
1696 static int acpi_video_bus_remove_fs(struct acpi_device
*device
)
1698 struct proc_dir_entry
*device_dir
= acpi_device_dir(device
);
1701 remove_proc_entry("info", device_dir
);
1702 remove_proc_entry("ROM", device_dir
);
1703 remove_proc_entry("POST_info", device_dir
);
1704 remove_proc_entry("POST", device_dir
);
1705 remove_proc_entry("DOS", device_dir
);
1706 remove_proc_entry(acpi_device_bid(device
), acpi_video_dir
);
1707 acpi_device_dir(device
) = NULL
;
1713 /* --------------------------------------------------------------------------
1715 -------------------------------------------------------------------------- */
1717 /* device interface */
1718 static struct acpi_video_device_attrib
*
1719 acpi_video_get_device_attr(struct acpi_video_bus
*video
, unsigned long device_id
)
1721 struct acpi_video_enumerated_device
*ids
;
1724 for (i
= 0; i
< video
->attached_count
; i
++) {
1725 ids
= &video
->attached_array
[i
];
1726 if ((ids
->value
.int_val
& 0xffff) == device_id
)
1727 return &ids
->value
.attrib
;
1734 acpi_video_bus_get_one_device(struct acpi_device
*device
,
1735 struct acpi_video_bus
*video
)
1737 unsigned long long device_id
;
1739 struct acpi_video_device
*data
;
1740 struct acpi_video_device_attrib
* attribute
;
1742 if (!device
|| !video
)
1746 acpi_evaluate_integer(device
->handle
, "_ADR", NULL
, &device_id
);
1747 if (ACPI_SUCCESS(status
)) {
1749 data
= kzalloc(sizeof(struct acpi_video_device
), GFP_KERNEL
);
1753 strcpy(acpi_device_name(device
), ACPI_VIDEO_DEVICE_NAME
);
1754 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
1755 device
->driver_data
= data
;
1757 data
->device_id
= device_id
;
1758 data
->video
= video
;
1761 attribute
= acpi_video_get_device_attr(video
, device_id
);
1763 if((attribute
!= NULL
) && attribute
->device_id_scheme
) {
1764 switch (attribute
->display_type
) {
1765 case ACPI_VIDEO_DISPLAY_CRT
:
1766 data
->flags
.crt
= 1;
1768 case ACPI_VIDEO_DISPLAY_TV
:
1769 data
->flags
.tvout
= 1;
1771 case ACPI_VIDEO_DISPLAY_DVI
:
1772 data
->flags
.dvi
= 1;
1774 case ACPI_VIDEO_DISPLAY_LCD
:
1775 data
->flags
.lcd
= 1;
1778 data
->flags
.unknown
= 1;
1781 if(attribute
->bios_can_detect
)
1782 data
->flags
.bios
= 1;
1784 data
->flags
.unknown
= 1;
1786 acpi_video_device_bind(video
, data
);
1787 acpi_video_device_find_cap(data
);
1789 status
= acpi_install_notify_handler(device
->handle
,
1791 acpi_video_device_notify
,
1793 if (ACPI_FAILURE(status
)) {
1794 printk(KERN_ERR PREFIX
1795 "Error installing notify handler\n");
1796 if(data
->brightness
)
1797 kfree(data
->brightness
->levels
);
1798 kfree(data
->brightness
);
1803 mutex_lock(&video
->device_list_lock
);
1804 list_add_tail(&data
->entry
, &video
->video_device_list
);
1805 mutex_unlock(&video
->device_list_lock
);
1807 acpi_video_device_add_fs(device
);
1817 * video : video bus device
1822 * Enumerate the video device list of the video bus,
1823 * bind the ids with the corresponding video devices
1824 * under the video bus.
1827 static void acpi_video_device_rebind(struct acpi_video_bus
*video
)
1829 struct acpi_video_device
*dev
;
1831 mutex_lock(&video
->device_list_lock
);
1833 list_for_each_entry(dev
, &video
->video_device_list
, entry
)
1834 acpi_video_device_bind(video
, dev
);
1836 mutex_unlock(&video
->device_list_lock
);
1841 * video : video bus device
1842 * device : video output device under the video
1848 * Bind the ids with the corresponding video devices
1849 * under the video bus.
1853 acpi_video_device_bind(struct acpi_video_bus
*video
,
1854 struct acpi_video_device
*device
)
1856 struct acpi_video_enumerated_device
*ids
;
1859 for (i
= 0; i
< video
->attached_count
; i
++) {
1860 ids
= &video
->attached_array
[i
];
1861 if (device
->device_id
== (ids
->value
.int_val
& 0xffff)) {
1862 ids
->bind_info
= device
;
1863 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "device_bind %d\n", i
));
1870 * video : video bus device
1875 * Call _DOD to enumerate all devices attached to display adapter
1879 static int acpi_video_device_enumerate(struct acpi_video_bus
*video
)
1884 struct acpi_video_enumerated_device
*active_list
;
1885 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
1886 union acpi_object
*dod
= NULL
;
1887 union acpi_object
*obj
;
1889 status
= acpi_evaluate_object(video
->device
->handle
, "_DOD", NULL
, &buffer
);
1890 if (!ACPI_SUCCESS(status
)) {
1891 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _DOD"));
1895 dod
= buffer
.pointer
;
1896 if (!dod
|| (dod
->type
!= ACPI_TYPE_PACKAGE
)) {
1897 ACPI_EXCEPTION((AE_INFO
, status
, "Invalid _DOD data"));
1902 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Found %d video heads in _DOD\n",
1903 dod
->package
.count
));
1905 active_list
= kcalloc(1 + dod
->package
.count
,
1906 sizeof(struct acpi_video_enumerated_device
),
1914 for (i
= 0; i
< dod
->package
.count
; i
++) {
1915 obj
= &dod
->package
.elements
[i
];
1917 if (obj
->type
!= ACPI_TYPE_INTEGER
) {
1918 printk(KERN_ERR PREFIX
1919 "Invalid _DOD data in element %d\n", i
);
1923 active_list
[count
].value
.int_val
= obj
->integer
.value
;
1924 active_list
[count
].bind_info
= NULL
;
1925 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "dod element[%d] = %d\n", i
,
1926 (int)obj
->integer
.value
));
1930 kfree(video
->attached_array
);
1932 video
->attached_array
= active_list
;
1933 video
->attached_count
= count
;
1936 kfree(buffer
.pointer
);
1941 acpi_video_get_next_level(struct acpi_video_device
*device
,
1942 u32 level_current
, u32 event
)
1944 int min
, max
, min_above
, max_below
, i
, l
, delta
= 255;
1945 max
= max_below
= 0;
1946 min
= min_above
= 255;
1947 /* Find closest level to level_current */
1948 for (i
= 2; i
< device
->brightness
->count
; i
++) {
1949 l
= device
->brightness
->levels
[i
];
1950 if (abs(l
- level_current
) < abs(delta
)) {
1951 delta
= l
- level_current
;
1956 /* Ajust level_current to closest available level */
1957 level_current
+= delta
;
1958 for (i
= 2; i
< device
->brightness
->count
; i
++) {
1959 l
= device
->brightness
->levels
[i
];
1964 if (l
< min_above
&& l
> level_current
)
1966 if (l
> max_below
&& l
< level_current
)
1971 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
:
1972 return (level_current
< max
) ? min_above
: min
;
1973 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
:
1974 return (level_current
< max
) ? min_above
: max
;
1975 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
:
1976 return (level_current
> min
) ? max_below
: min
;
1977 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
:
1978 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
:
1981 return level_current
;
1986 acpi_video_switch_brightness(struct acpi_video_device
*device
, int event
)
1988 unsigned long long level_current
, level_next
;
1989 int result
= -EINVAL
;
1991 /* no warning message if acpi_backlight=vendor is used */
1992 if (!acpi_video_backlight_support())
1995 if (!device
->brightness
)
1998 result
= acpi_video_device_lcd_get_level_current(device
,
2003 level_next
= acpi_video_get_next_level(device
, level_current
, event
);
2005 result
= acpi_video_device_lcd_set_level(device
, level_next
);
2008 backlight_force_update(device
->backlight
,
2009 BACKLIGHT_UPDATE_HOTKEY
);
2013 printk(KERN_ERR PREFIX
"Failed to switch the brightness\n");
2019 acpi_video_bus_get_devices(struct acpi_video_bus
*video
,
2020 struct acpi_device
*device
)
2023 struct acpi_device
*dev
;
2025 acpi_video_device_enumerate(video
);
2027 list_for_each_entry(dev
, &device
->children
, node
) {
2029 status
= acpi_video_bus_get_one_device(dev
, video
);
2030 if (ACPI_FAILURE(status
)) {
2031 printk(KERN_WARNING PREFIX
2032 "Cant attach device");
2039 static int acpi_video_bus_put_one_device(struct acpi_video_device
*device
)
2042 struct acpi_video_bus
*video
;
2045 if (!device
|| !device
->video
)
2048 video
= device
->video
;
2050 acpi_video_device_remove_fs(device
->dev
);
2052 status
= acpi_remove_notify_handler(device
->dev
->handle
,
2054 acpi_video_device_notify
);
2055 if (device
->backlight
) {
2056 sysfs_remove_link(&device
->backlight
->dev
.kobj
, "device");
2057 backlight_device_unregister(device
->backlight
);
2058 device
->backlight
= NULL
;
2060 if (device
->cooling_dev
) {
2061 sysfs_remove_link(&device
->dev
->dev
.kobj
,
2063 sysfs_remove_link(&device
->cooling_dev
->device
.kobj
,
2065 thermal_cooling_device_unregister(device
->cooling_dev
);
2066 device
->cooling_dev
= NULL
;
2068 video_output_unregister(device
->output_dev
);
2073 static int acpi_video_bus_put_devices(struct acpi_video_bus
*video
)
2076 struct acpi_video_device
*dev
, *next
;
2078 mutex_lock(&video
->device_list_lock
);
2080 list_for_each_entry_safe(dev
, next
, &video
->video_device_list
, entry
) {
2082 status
= acpi_video_bus_put_one_device(dev
);
2083 if (ACPI_FAILURE(status
))
2084 printk(KERN_WARNING PREFIX
2085 "hhuuhhuu bug in acpi video driver.\n");
2087 if (dev
->brightness
) {
2088 kfree(dev
->brightness
->levels
);
2089 kfree(dev
->brightness
);
2091 list_del(&dev
->entry
);
2095 mutex_unlock(&video
->device_list_lock
);
2100 /* acpi_video interface */
2102 static int acpi_video_bus_start_devices(struct acpi_video_bus
*video
)
2104 return acpi_video_bus_DOS(video
, 0, 0);
2107 static int acpi_video_bus_stop_devices(struct acpi_video_bus
*video
)
2109 return acpi_video_bus_DOS(video
, 0, 1);
2112 static void acpi_video_bus_notify(struct acpi_device
*device
, u32 event
)
2114 struct acpi_video_bus
*video
= acpi_driver_data(device
);
2115 struct input_dev
*input
;
2121 input
= video
->input
;
2124 case ACPI_VIDEO_NOTIFY_SWITCH
: /* User requested a switch,
2125 * most likely via hotkey. */
2126 acpi_bus_generate_proc_event(device
, event
, 0);
2127 keycode
= KEY_SWITCHVIDEOMODE
;
2130 case ACPI_VIDEO_NOTIFY_PROBE
: /* User plugged in or removed a video
2132 acpi_video_device_enumerate(video
);
2133 acpi_video_device_rebind(video
);
2134 acpi_bus_generate_proc_event(device
, event
, 0);
2135 keycode
= KEY_SWITCHVIDEOMODE
;
2138 case ACPI_VIDEO_NOTIFY_CYCLE
: /* Cycle Display output hotkey pressed. */
2139 acpi_bus_generate_proc_event(device
, event
, 0);
2140 keycode
= KEY_SWITCHVIDEOMODE
;
2142 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
: /* Next Display output hotkey pressed. */
2143 acpi_bus_generate_proc_event(device
, event
, 0);
2144 keycode
= KEY_VIDEO_NEXT
;
2146 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT
: /* previous Display output hotkey pressed. */
2147 acpi_bus_generate_proc_event(device
, event
, 0);
2148 keycode
= KEY_VIDEO_PREV
;
2152 keycode
= KEY_UNKNOWN
;
2153 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
2154 "Unsupported event [0x%x]\n", event
));
2158 acpi_notifier_call_chain(device
, event
, 0);
2159 input_report_key(input
, keycode
, 1);
2161 input_report_key(input
, keycode
, 0);
2167 static void acpi_video_device_notify(acpi_handle handle
, u32 event
, void *data
)
2169 struct acpi_video_device
*video_device
= data
;
2170 struct acpi_device
*device
= NULL
;
2171 struct acpi_video_bus
*bus
;
2172 struct input_dev
*input
;
2178 device
= video_device
->dev
;
2179 bus
= video_device
->video
;
2183 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
: /* Cycle brightness */
2184 if (brightness_switch_enabled
)
2185 acpi_video_switch_brightness(video_device
, event
);
2186 acpi_bus_generate_proc_event(device
, event
, 0);
2187 keycode
= KEY_BRIGHTNESS_CYCLE
;
2189 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
: /* Increase brightness */
2190 if (brightness_switch_enabled
)
2191 acpi_video_switch_brightness(video_device
, event
);
2192 acpi_bus_generate_proc_event(device
, event
, 0);
2193 keycode
= KEY_BRIGHTNESSUP
;
2195 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
: /* Decrease brightness */
2196 if (brightness_switch_enabled
)
2197 acpi_video_switch_brightness(video_device
, event
);
2198 acpi_bus_generate_proc_event(device
, event
, 0);
2199 keycode
= KEY_BRIGHTNESSDOWN
;
2201 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
: /* zero brightnesss */
2202 if (brightness_switch_enabled
)
2203 acpi_video_switch_brightness(video_device
, event
);
2204 acpi_bus_generate_proc_event(device
, event
, 0);
2205 keycode
= KEY_BRIGHTNESS_ZERO
;
2207 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF
: /* display device off */
2208 if (brightness_switch_enabled
)
2209 acpi_video_switch_brightness(video_device
, event
);
2210 acpi_bus_generate_proc_event(device
, event
, 0);
2211 keycode
= KEY_DISPLAY_OFF
;
2214 keycode
= KEY_UNKNOWN
;
2215 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
2216 "Unsupported event [0x%x]\n", event
));
2220 acpi_notifier_call_chain(device
, event
, 0);
2221 input_report_key(input
, keycode
, 1);
2223 input_report_key(input
, keycode
, 0);
2229 static int instance
;
2230 static int acpi_video_resume(struct acpi_device
*device
)
2232 struct acpi_video_bus
*video
;
2233 struct acpi_video_device
*video_device
;
2236 if (!device
|| !acpi_driver_data(device
))
2239 video
= acpi_driver_data(device
);
2241 for (i
= 0; i
< video
->attached_count
; i
++) {
2242 video_device
= video
->attached_array
[i
].bind_info
;
2243 if (video_device
&& video_device
->backlight
)
2244 acpi_video_set_brightness(video_device
->backlight
);
2250 acpi_video_bus_match(acpi_handle handle
, u32 level
, void *context
,
2251 void **return_value
)
2253 struct acpi_device
*device
= context
;
2254 struct acpi_device
*sibling
;
2257 if (handle
== device
->handle
)
2258 return AE_CTRL_TERMINATE
;
2260 result
= acpi_bus_get_device(handle
, &sibling
);
2264 if (!strcmp(acpi_device_name(sibling
), ACPI_VIDEO_BUS_NAME
))
2265 return AE_ALREADY_EXISTS
;
2270 static int acpi_video_bus_add(struct acpi_device
*device
)
2272 struct acpi_video_bus
*video
;
2273 struct input_dev
*input
;
2277 status
= acpi_walk_namespace(ACPI_TYPE_DEVICE
,
2278 device
->parent
->handle
, 1,
2279 acpi_video_bus_match
, NULL
,
2281 if (status
== AE_ALREADY_EXISTS
) {
2282 printk(KERN_WARNING FW_BUG
2283 "Duplicate ACPI video bus devices for the"
2284 " same VGA controller, please try module "
2285 "parameter \"video.allow_duplicates=1\""
2286 "if the current driver doesn't work.\n");
2287 if (!allow_duplicates
)
2291 video
= kzalloc(sizeof(struct acpi_video_bus
), GFP_KERNEL
);
2295 /* a hack to fix the duplicate name "VID" problem on T61 */
2296 if (!strcmp(device
->pnp
.bus_id
, "VID")) {
2298 device
->pnp
.bus_id
[3] = '0' + instance
;
2301 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2302 if (!strcmp(device
->pnp
.bus_id
, "VGA")) {
2304 device
->pnp
.bus_id
[3] = '0' + instance
;
2308 video
->device
= device
;
2309 strcpy(acpi_device_name(device
), ACPI_VIDEO_BUS_NAME
);
2310 strcpy(acpi_device_class(device
), ACPI_VIDEO_CLASS
);
2311 device
->driver_data
= video
;
2313 acpi_video_bus_find_cap(video
);
2314 error
= acpi_video_bus_check(video
);
2316 goto err_free_video
;
2318 error
= acpi_video_bus_add_fs(device
);
2320 goto err_free_video
;
2322 mutex_init(&video
->device_list_lock
);
2323 INIT_LIST_HEAD(&video
->video_device_list
);
2325 acpi_video_bus_get_devices(video
, device
);
2326 acpi_video_bus_start_devices(video
);
2328 video
->input
= input
= input_allocate_device();
2331 goto err_stop_video
;
2334 snprintf(video
->phys
, sizeof(video
->phys
),
2335 "%s/video/input0", acpi_device_hid(video
->device
));
2337 input
->name
= acpi_device_name(video
->device
);
2338 input
->phys
= video
->phys
;
2339 input
->id
.bustype
= BUS_HOST
;
2340 input
->id
.product
= 0x06;
2341 input
->dev
.parent
= &device
->dev
;
2342 input
->evbit
[0] = BIT(EV_KEY
);
2343 set_bit(KEY_SWITCHVIDEOMODE
, input
->keybit
);
2344 set_bit(KEY_VIDEO_NEXT
, input
->keybit
);
2345 set_bit(KEY_VIDEO_PREV
, input
->keybit
);
2346 set_bit(KEY_BRIGHTNESS_CYCLE
, input
->keybit
);
2347 set_bit(KEY_BRIGHTNESSUP
, input
->keybit
);
2348 set_bit(KEY_BRIGHTNESSDOWN
, input
->keybit
);
2349 set_bit(KEY_BRIGHTNESS_ZERO
, input
->keybit
);
2350 set_bit(KEY_DISPLAY_OFF
, input
->keybit
);
2351 set_bit(KEY_UNKNOWN
, input
->keybit
);
2353 error
= input_register_device(input
);
2355 goto err_free_input_dev
;
2357 printk(KERN_INFO PREFIX
"%s [%s] (multi-head: %s rom: %s post: %s)\n",
2358 ACPI_VIDEO_DEVICE_NAME
, acpi_device_bid(device
),
2359 video
->flags
.multihead
? "yes" : "no",
2360 video
->flags
.rom
? "yes" : "no",
2361 video
->flags
.post
? "yes" : "no");
2366 input_free_device(input
);
2368 acpi_video_bus_stop_devices(video
);
2369 acpi_video_bus_put_devices(video
);
2370 kfree(video
->attached_array
);
2371 acpi_video_bus_remove_fs(device
);
2374 device
->driver_data
= NULL
;
2379 static int acpi_video_bus_remove(struct acpi_device
*device
, int type
)
2381 struct acpi_video_bus
*video
= NULL
;
2384 if (!device
|| !acpi_driver_data(device
))
2387 video
= acpi_driver_data(device
);
2389 acpi_video_bus_stop_devices(video
);
2390 acpi_video_bus_put_devices(video
);
2391 acpi_video_bus_remove_fs(device
);
2393 input_unregister_device(video
->input
);
2394 kfree(video
->attached_array
);
2400 static int __init
intel_opregion_present(void)
2402 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2403 struct pci_dev
*dev
= NULL
;
2406 for_each_pci_dev(dev
) {
2407 if ((dev
->class >> 8) != PCI_CLASS_DISPLAY_VGA
)
2409 if (dev
->vendor
!= PCI_VENDOR_ID_INTEL
)
2411 pci_read_config_dword(dev
, 0xfc, &address
);
2420 int acpi_video_register(void)
2423 if (register_count
) {
2425 * if the function of acpi_video_register is already called,
2426 * don't register the acpi_vide_bus again and return no error.
2431 acpi_video_dir
= proc_mkdir(ACPI_VIDEO_CLASS
, acpi_root_dir
);
2432 if (!acpi_video_dir
)
2435 result
= acpi_bus_register_driver(&acpi_video_bus
);
2437 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
2442 * When the acpi_video_bus is loaded successfully, increase
2443 * the counter reference.
2449 EXPORT_SYMBOL(acpi_video_register
);
2451 void acpi_video_unregister(void)
2453 if (!register_count
) {
2455 * If the acpi video bus is already unloaded, don't
2456 * unload it again and return directly.
2460 acpi_bus_unregister_driver(&acpi_video_bus
);
2462 remove_proc_entry(ACPI_VIDEO_CLASS
, acpi_root_dir
);
2468 EXPORT_SYMBOL(acpi_video_unregister
);
2471 * This is kind of nasty. Hardware using Intel chipsets may require
2472 * the video opregion code to be run first in order to initialise
2473 * state before any ACPI video calls are made. To handle this we defer
2474 * registration of the video class until the opregion code has run.
2477 static int __init
acpi_video_init(void)
2479 dmi_check_system(video_dmi_table
);
2481 if (intel_opregion_present())
2484 return acpi_video_register();
2487 static void __exit
acpi_video_exit(void)
2489 acpi_video_unregister();
2494 module_init(acpi_video_init
);
2495 module_exit(acpi_video_exit
);