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 <asm/uaccess.h>
41 #include <acpi/acpi_bus.h>
42 #include <acpi/acpi_drivers.h>
44 #define ACPI_VIDEO_COMPONENT 0x08000000
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 *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 *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 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)
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);
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 *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 *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 };
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 };
487 arg0.integer.value = level;
489 if (device->cap._BCM)
490 status = acpi_evaluate_object(device->dev->handle, "_BCM",
492 device->brightness->curr = level;
497 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
498 unsigned long *level)
500 if (device->cap._BQC)
501 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
503 *level = device->brightness->curr;
508 acpi_video_device_EDID(struct acpi_video_device *device,
509 union acpi_object **edid, ssize_t length)
512 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
513 union acpi_object *obj;
514 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
515 struct acpi_object_list args = { 1, &arg0 };
523 arg0.integer.value = 1;
524 else if (length == 256)
525 arg0.integer.value = 2;
529 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
530 if (ACPI_FAILURE(status))
533 obj = buffer.pointer;
535 if (obj && obj->type == ACPI_TYPE_BUFFER)
538 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
549 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
553 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
554 struct acpi_object_list args = { 1, &arg0 };
557 arg0.integer.value = option;
559 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
560 if (ACPI_SUCCESS(status))
561 status = tmp ? (-EINVAL) : (AE_OK);
567 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
571 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
577 acpi_video_bus_POST_options(struct acpi_video_bus *video,
578 unsigned long *options)
582 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
590 * video : video bus device pointer
592 * 0. The system BIOS should NOT automatically switch(toggle)
593 * the active display output.
594 * 1. The system BIOS should automatically switch (toggle) the
595 * active display output. No switch event.
596 * 2. The _DGS value should be locked.
597 * 3. The system BIOS should not automatically switch (toggle) the
598 * active display output, but instead generate the display switch
601 * 0. The system BIOS should automatically control the brightness level
602 * of the LCD when the power changes from AC to DC
603 * 1. The system BIOS should NOT automatically control the brightness
604 * level of the LCD when the power changes from AC to DC.
610 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
612 acpi_integer status = 0;
613 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
614 struct acpi_object_list args = { 1, &arg0 };
617 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
621 arg0.integer.value = (lcd_flag << 2) | bios_flag;
622 video->dos_setting = arg0.integer.value;
623 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
631 * device : video output device (LCD, CRT, ..)
634 * Maximum brightness level
636 * Allocate and initialize device->brightness.
640 acpi_video_init_brightness(struct acpi_video_device *device)
642 union acpi_object *obj = NULL;
643 int i, max_level = 0, count = 0;
644 union acpi_object *o;
645 struct acpi_video_device_brightness *br = NULL;
647 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
648 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
649 "LCD brightness level\n"));
653 if (obj->package.count < 2)
656 br = kzalloc(sizeof(*br), GFP_KERNEL);
658 printk(KERN_ERR "can't allocate memory\n");
662 br->levels = kmalloc(obj->package.count * sizeof *(br->levels),
667 for (i = 0; i < obj->package.count; i++) {
668 o = (union acpi_object *)&obj->package.elements[i];
669 if (o->type != ACPI_TYPE_INTEGER) {
670 printk(KERN_ERR PREFIX "Invalid data\n");
673 br->levels[count] = (u32) o->integer.value;
675 if (br->levels[count] > max_level)
676 max_level = br->levels[count];
681 goto out_free_levels;
684 device->brightness = br;
685 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "found %d brightness levels\n", count));
694 device->brightness = NULL;
701 * device : video output device (LCD, CRT, ..)
706 * Find out all required AML methods defined under the output
710 static void acpi_video_device_find_cap(struct acpi_video_device *device)
712 acpi_handle h_dummy1;
716 memset(&device->cap, 0, sizeof(device->cap));
718 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
719 device->cap._ADR = 1;
721 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
722 device->cap._BCL = 1;
724 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
725 device->cap._BCM = 1;
727 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
728 device->cap._BQC = 1;
729 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
730 device->cap._DDC = 1;
732 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
733 device->cap._DCS = 1;
735 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
736 device->cap._DGS = 1;
738 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
739 device->cap._DSS = 1;
742 max_level = acpi_video_init_brightness(device);
744 if (device->cap._BCL && device->cap._BCM && max_level > 0) {
746 static int count = 0;
748 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
752 sprintf(name, "acpi_video%d", count++);
753 device->backlight = backlight_device_register(name,
754 NULL, device, &acpi_backlight_ops);
755 device->backlight->props.max_brightness = device->brightness->count-3;
757 * If there exists the _BQC object, the _BQC object will be
758 * called to get the current backlight brightness. Otherwise
759 * the brightness will be set to the maximum.
761 if (device->cap._BQC)
762 device->backlight->props.brightness =
763 acpi_video_get_brightness(device->backlight);
765 device->backlight->props.brightness =
766 device->backlight->props.max_brightness;
767 backlight_update_status(device->backlight);
770 device->cdev = thermal_cooling_device_register("LCD",
771 device->dev, &video_cooling_ops);
772 if (IS_ERR(device->cdev))
775 printk(KERN_INFO PREFIX
776 "%s is registered as cooling_device%d\n",
777 device->dev->dev.bus_id, device->cdev->id);
778 result = sysfs_create_link(&device->dev->dev.kobj,
779 &device->cdev->device.kobj,
782 printk(KERN_ERR PREFIX "Create sysfs link\n");
783 result = sysfs_create_link(&device->cdev->device.kobj,
784 &device->dev->dev.kobj, "device");
786 printk(KERN_ERR PREFIX "Create sysfs link\n");
789 if (device->cap._DCS && device->cap._DSS){
790 static int count = 0;
792 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
795 sprintf(name, "acpi_video%d", count++);
796 device->output_dev = video_output_register(name,
797 NULL, device, &acpi_output_properties);
805 * device : video output device (VGA)
810 * Find out all required AML methods defined under the video bus device.
813 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
815 acpi_handle h_dummy1;
817 memset(&video->cap, 0, sizeof(video->cap));
818 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
821 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
824 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
827 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
830 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
833 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
839 * Check whether the video bus device has required AML method to
840 * support the desired features
843 static int acpi_video_bus_check(struct acpi_video_bus *video)
845 acpi_status status = -ENOENT;
851 /* Since there is no HID, CID and so on for VGA driver, we have
852 * to check well known required nodes.
855 /* Does this device support video switching? */
856 if (video->cap._DOS) {
857 video->flags.multihead = 1;
861 /* Does this device support retrieving a video ROM? */
862 if (video->cap._ROM) {
863 video->flags.rom = 1;
867 /* Does this device support configuring which video device to POST? */
868 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
869 video->flags.post = 1;
876 /* --------------------------------------------------------------------------
878 -------------------------------------------------------------------------- */
880 static struct proc_dir_entry *acpi_video_dir;
884 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
886 struct acpi_video_device *dev = seq->private;
892 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
893 seq_printf(seq, "type: ");
895 seq_printf(seq, "CRT\n");
896 else if (dev->flags.lcd)
897 seq_printf(seq, "LCD\n");
898 else if (dev->flags.tvout)
899 seq_printf(seq, "TVOUT\n");
900 else if (dev->flags.dvi)
901 seq_printf(seq, "DVI\n");
903 seq_printf(seq, "UNKNOWN\n");
905 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
912 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
914 return single_open(file, acpi_video_device_info_seq_show,
918 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
921 struct acpi_video_device *dev = seq->private;
928 status = acpi_video_device_get_state(dev, &state);
929 seq_printf(seq, "state: ");
930 if (ACPI_SUCCESS(status))
931 seq_printf(seq, "0x%02lx\n", state);
933 seq_printf(seq, "<not supported>\n");
935 status = acpi_video_device_query(dev, &state);
936 seq_printf(seq, "query: ");
937 if (ACPI_SUCCESS(status))
938 seq_printf(seq, "0x%02lx\n", state);
940 seq_printf(seq, "<not supported>\n");
947 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
949 return single_open(file, acpi_video_device_state_seq_show,
954 acpi_video_device_write_state(struct file *file,
955 const char __user * buffer,
956 size_t count, loff_t * data)
959 struct seq_file *m = file->private_data;
960 struct acpi_video_device *dev = m->private;
961 char str[12] = { 0 };
965 if (!dev || count + 1 > sizeof str)
968 if (copy_from_user(str, buffer, count))
972 state = simple_strtoul(str, NULL, 0);
973 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
975 status = acpi_video_device_set_state(dev, state);
984 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
986 struct acpi_video_device *dev = seq->private;
990 if (!dev || !dev->brightness) {
991 seq_printf(seq, "<not supported>\n");
995 seq_printf(seq, "levels: ");
996 for (i = 0; i < dev->brightness->count; i++)
997 seq_printf(seq, " %d", dev->brightness->levels[i]);
998 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1004 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1006 return single_open(file, acpi_video_device_brightness_seq_show,
1011 acpi_video_device_write_brightness(struct file *file,
1012 const char __user * buffer,
1013 size_t count, loff_t * data)
1015 struct seq_file *m = file->private_data;
1016 struct acpi_video_device *dev = m->private;
1017 char str[5] = { 0 };
1018 unsigned int level = 0;
1022 if (!dev || !dev->brightness || count + 1 > sizeof str)
1025 if (copy_from_user(str, buffer, count))
1029 level = simple_strtoul(str, NULL, 0);
1034 /* validate through the list of available levels */
1035 for (i = 0; i < dev->brightness->count; i++)
1036 if (level == dev->brightness->levels[i]) {
1038 (acpi_video_device_lcd_set_level(dev, level)))
1039 dev->brightness->curr = level;
1046 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1048 struct acpi_video_device *dev = seq->private;
1051 union acpi_object *edid = NULL;
1057 status = acpi_video_device_EDID(dev, &edid, 128);
1058 if (ACPI_FAILURE(status)) {
1059 status = acpi_video_device_EDID(dev, &edid, 256);
1062 if (ACPI_FAILURE(status)) {
1066 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1067 for (i = 0; i < edid->buffer.length; i++)
1068 seq_putc(seq, edid->buffer.pointer[i]);
1073 seq_printf(seq, "<not supported>\n");
1081 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1083 return single_open(file, acpi_video_device_EDID_seq_show,
1087 static int acpi_video_device_add_fs(struct acpi_device *device)
1089 struct proc_dir_entry *entry, *device_dir;
1090 struct acpi_video_device *vid_dev;
1092 vid_dev = acpi_driver_data(device);
1096 device_dir = proc_mkdir(acpi_device_bid(device),
1097 vid_dev->video->dir);
1101 device_dir->owner = THIS_MODULE;
1104 entry = proc_create_data("info", S_IRUGO, device_dir,
1105 &acpi_video_device_info_fops, acpi_driver_data(device));
1107 goto err_remove_dir;
1110 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1111 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1113 &acpi_video_device_state_fops,
1114 acpi_driver_data(device));
1116 goto err_remove_info;
1118 /* 'brightness' [R/W] */
1119 acpi_video_device_brightness_fops.write =
1120 acpi_video_device_write_brightness;
1121 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1123 &acpi_video_device_brightness_fops,
1124 acpi_driver_data(device));
1126 goto err_remove_state;
1129 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1130 &acpi_video_device_EDID_fops,
1131 acpi_driver_data(device));
1133 goto err_remove_brightness;
1135 acpi_device_dir(device) = device_dir;
1139 err_remove_brightness:
1140 remove_proc_entry("brightness", device_dir);
1142 remove_proc_entry("state", device_dir);
1144 remove_proc_entry("info", device_dir);
1146 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1150 static int acpi_video_device_remove_fs(struct acpi_device *device)
1152 struct acpi_video_device *vid_dev;
1153 struct proc_dir_entry *device_dir;
1155 vid_dev = acpi_driver_data(device);
1156 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1159 device_dir = acpi_device_dir(device);
1161 remove_proc_entry("info", device_dir);
1162 remove_proc_entry("state", device_dir);
1163 remove_proc_entry("brightness", device_dir);
1164 remove_proc_entry("EDID", device_dir);
1165 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1166 acpi_device_dir(device) = NULL;
1173 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1175 struct acpi_video_bus *video = seq->private;
1181 seq_printf(seq, "Switching heads: %s\n",
1182 video->flags.multihead ? "yes" : "no");
1183 seq_printf(seq, "Video ROM: %s\n",
1184 video->flags.rom ? "yes" : "no");
1185 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1186 video->flags.post ? "yes" : "no");
1192 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1194 return single_open(file, acpi_video_bus_info_seq_show,
1198 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1200 struct acpi_video_bus *video = seq->private;
1206 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1207 seq_printf(seq, "<TODO>\n");
1213 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1215 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1218 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1220 struct acpi_video_bus *video = seq->private;
1221 unsigned long options;
1228 status = acpi_video_bus_POST_options(video, &options);
1229 if (ACPI_SUCCESS(status)) {
1230 if (!(options & 1)) {
1231 printk(KERN_WARNING PREFIX
1232 "The motherboard VGA device is not listed as a possible POST device.\n");
1233 printk(KERN_WARNING PREFIX
1234 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1236 printk("%lx\n", options);
1237 seq_printf(seq, "can POST: <integrated video>");
1239 seq_printf(seq, " <PCI video>");
1241 seq_printf(seq, " <AGP video>");
1242 seq_putc(seq, '\n');
1244 seq_printf(seq, "<not supported>\n");
1250 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1252 return single_open(file, acpi_video_bus_POST_info_seq_show,
1256 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1258 struct acpi_video_bus *video = seq->private;
1266 status = acpi_video_bus_get_POST(video, &id);
1267 if (!ACPI_SUCCESS(status)) {
1268 seq_printf(seq, "<not supported>\n");
1271 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1277 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1279 struct acpi_video_bus *video = seq->private;
1282 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1287 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1289 return single_open(file, acpi_video_bus_POST_seq_show,
1293 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1295 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1299 acpi_video_bus_write_POST(struct file *file,
1300 const char __user * buffer,
1301 size_t count, loff_t * data)
1304 struct seq_file *m = file->private_data;
1305 struct acpi_video_bus *video = m->private;
1306 char str[12] = { 0 };
1307 unsigned long opt, options;
1310 if (!video || count + 1 > sizeof str)
1313 status = acpi_video_bus_POST_options(video, &options);
1314 if (!ACPI_SUCCESS(status))
1317 if (copy_from_user(str, buffer, count))
1321 opt = strtoul(str, NULL, 0);
1325 /* just in case an OEM 'forgot' the motherboard... */
1328 if (options & (1ul << opt)) {
1329 status = acpi_video_bus_set_POST(video, opt);
1330 if (!ACPI_SUCCESS(status))
1339 acpi_video_bus_write_DOS(struct file *file,
1340 const char __user * buffer,
1341 size_t count, loff_t * data)
1344 struct seq_file *m = file->private_data;
1345 struct acpi_video_bus *video = m->private;
1346 char str[12] = { 0 };
1350 if (!video || count + 1 > sizeof str)
1353 if (copy_from_user(str, buffer, count))
1357 opt = strtoul(str, NULL, 0);
1361 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1363 if (!ACPI_SUCCESS(status))
1369 static int acpi_video_bus_add_fs(struct acpi_device *device)
1371 struct acpi_video_bus *video = acpi_driver_data(device);
1372 struct proc_dir_entry *device_dir;
1373 struct proc_dir_entry *entry;
1375 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1379 device_dir->owner = THIS_MODULE;
1382 entry = proc_create_data("info", S_IRUGO, device_dir,
1383 &acpi_video_bus_info_fops,
1384 acpi_driver_data(device));
1386 goto err_remove_dir;
1389 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1390 &acpi_video_bus_ROM_fops,
1391 acpi_driver_data(device));
1393 goto err_remove_info;
1395 /* 'POST_info' [R] */
1396 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1397 &acpi_video_bus_POST_info_fops,
1398 acpi_driver_data(device));
1400 goto err_remove_rom;
1403 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1404 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1406 &acpi_video_bus_POST_fops,
1407 acpi_driver_data(device));
1409 goto err_remove_post_info;
1412 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1413 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1415 &acpi_video_bus_DOS_fops,
1416 acpi_driver_data(device));
1418 goto err_remove_post;
1420 video->dir = acpi_device_dir(device) = device_dir;
1424 remove_proc_entry("POST", device_dir);
1425 err_remove_post_info:
1426 remove_proc_entry("POST_info", device_dir);
1428 remove_proc_entry("ROM", device_dir);
1430 remove_proc_entry("info", device_dir);
1432 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1436 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1438 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1441 remove_proc_entry("info", device_dir);
1442 remove_proc_entry("ROM", device_dir);
1443 remove_proc_entry("POST_info", device_dir);
1444 remove_proc_entry("POST", device_dir);
1445 remove_proc_entry("DOS", device_dir);
1446 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1447 acpi_device_dir(device) = NULL;
1453 /* --------------------------------------------------------------------------
1455 -------------------------------------------------------------------------- */
1457 /* device interface */
1458 static struct acpi_video_device_attrib*
1459 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1461 struct acpi_video_enumerated_device *ids;
1464 for (i = 0; i < video->attached_count; i++) {
1465 ids = &video->attached_array[i];
1466 if ((ids->value.int_val & 0xffff) == device_id)
1467 return &ids->value.attrib;
1474 acpi_video_bus_get_one_device(struct acpi_device *device,
1475 struct acpi_video_bus *video)
1477 unsigned long device_id;
1479 struct acpi_video_device *data;
1480 struct acpi_video_device_attrib* attribute;
1482 if (!device || !video)
1486 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1487 if (ACPI_SUCCESS(status)) {
1489 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1493 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1494 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1495 acpi_driver_data(device) = data;
1497 data->device_id = device_id;
1498 data->video = video;
1501 attribute = acpi_video_get_device_attr(video, device_id);
1503 if((attribute != NULL) && attribute->device_id_scheme) {
1504 switch (attribute->display_type) {
1505 case ACPI_VIDEO_DISPLAY_CRT:
1506 data->flags.crt = 1;
1508 case ACPI_VIDEO_DISPLAY_TV:
1509 data->flags.tvout = 1;
1511 case ACPI_VIDEO_DISPLAY_DVI:
1512 data->flags.dvi = 1;
1514 case ACPI_VIDEO_DISPLAY_LCD:
1515 data->flags.lcd = 1;
1518 data->flags.unknown = 1;
1521 if(attribute->bios_can_detect)
1522 data->flags.bios = 1;
1524 data->flags.unknown = 1;
1526 acpi_video_device_bind(video, data);
1527 acpi_video_device_find_cap(data);
1529 status = acpi_install_notify_handler(device->handle,
1531 acpi_video_device_notify,
1533 if (ACPI_FAILURE(status)) {
1534 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1535 "Error installing notify handler\n"));
1536 if(data->brightness)
1537 kfree(data->brightness->levels);
1538 kfree(data->brightness);
1543 mutex_lock(&video->device_list_lock);
1544 list_add_tail(&data->entry, &video->video_device_list);
1545 mutex_unlock(&video->device_list_lock);
1547 acpi_video_device_add_fs(device);
1557 * video : video bus device
1562 * Enumerate the video device list of the video bus,
1563 * bind the ids with the corresponding video devices
1564 * under the video bus.
1567 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1569 struct acpi_video_device *dev;
1571 mutex_lock(&video->device_list_lock);
1573 list_for_each_entry(dev, &video->video_device_list, entry)
1574 acpi_video_device_bind(video, dev);
1576 mutex_unlock(&video->device_list_lock);
1581 * video : video bus device
1582 * device : video output device under the video
1588 * Bind the ids with the corresponding video devices
1589 * under the video bus.
1593 acpi_video_device_bind(struct acpi_video_bus *video,
1594 struct acpi_video_device *device)
1596 struct acpi_video_enumerated_device *ids;
1599 for (i = 0; i < video->attached_count; i++) {
1600 ids = &video->attached_array[i];
1601 if (device->device_id == (ids->value.int_val & 0xffff)) {
1602 ids->bind_info = device;
1603 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1610 * video : video bus device
1615 * Call _DOD to enumerate all devices attached to display adapter
1619 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1624 struct acpi_video_enumerated_device *active_list;
1625 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1626 union acpi_object *dod = NULL;
1627 union acpi_object *obj;
1629 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1630 if (!ACPI_SUCCESS(status)) {
1631 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1635 dod = buffer.pointer;
1636 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1637 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1642 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1643 dod->package.count));
1645 active_list = kcalloc(1 + dod->package.count,
1646 sizeof(struct acpi_video_enumerated_device),
1654 for (i = 0; i < dod->package.count; i++) {
1655 obj = &dod->package.elements[i];
1657 if (obj->type != ACPI_TYPE_INTEGER) {
1658 printk(KERN_ERR PREFIX
1659 "Invalid _DOD data in element %d\n", i);
1663 active_list[count].value.int_val = obj->integer.value;
1664 active_list[count].bind_info = NULL;
1665 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1666 (int)obj->integer.value));
1670 kfree(video->attached_array);
1672 video->attached_array = active_list;
1673 video->attached_count = count;
1676 kfree(buffer.pointer);
1681 acpi_video_get_next_level(struct acpi_video_device *device,
1682 u32 level_current, u32 event)
1684 int min, max, min_above, max_below, i, l, delta = 255;
1685 max = max_below = 0;
1686 min = min_above = 255;
1687 /* Find closest level to level_current */
1688 for (i = 0; i < device->brightness->count; i++) {
1689 l = device->brightness->levels[i];
1690 if (abs(l - level_current) < abs(delta)) {
1691 delta = l - level_current;
1696 /* Ajust level_current to closest available level */
1697 level_current += delta;
1698 for (i = 0; i < device->brightness->count; i++) {
1699 l = device->brightness->levels[i];
1704 if (l < min_above && l > level_current)
1706 if (l > max_below && l < level_current)
1711 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1712 return (level_current < max) ? min_above : min;
1713 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1714 return (level_current < max) ? min_above : max;
1715 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1716 return (level_current > min) ? max_below : min;
1717 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1718 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1721 return level_current;
1726 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1728 unsigned long level_current, level_next;
1729 if (!device->brightness)
1731 acpi_video_device_lcd_get_level_current(device, &level_current);
1732 level_next = acpi_video_get_next_level(device, level_current, event);
1733 acpi_video_device_lcd_set_level(device, level_next);
1737 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1738 struct acpi_device *device)
1741 struct acpi_device *dev;
1743 acpi_video_device_enumerate(video);
1745 list_for_each_entry(dev, &device->children, node) {
1747 status = acpi_video_bus_get_one_device(dev, video);
1748 if (ACPI_FAILURE(status)) {
1749 ACPI_DEBUG_PRINT((ACPI_DB_WARN,
1750 "Cant attach device"));
1757 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1760 struct acpi_video_bus *video;
1763 if (!device || !device->video)
1766 video = device->video;
1768 acpi_video_device_remove_fs(device->dev);
1770 status = acpi_remove_notify_handler(device->dev->handle,
1772 acpi_video_device_notify);
1773 backlight_device_unregister(device->backlight);
1775 sysfs_remove_link(&device->dev->dev.kobj,
1777 sysfs_remove_link(&device->cdev->device.kobj,
1779 thermal_cooling_device_unregister(device->cdev);
1780 device->cdev = NULL;
1782 video_output_unregister(device->output_dev);
1787 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1790 struct acpi_video_device *dev, *next;
1792 mutex_lock(&video->device_list_lock);
1794 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1796 status = acpi_video_bus_put_one_device(dev);
1797 if (ACPI_FAILURE(status))
1798 printk(KERN_WARNING PREFIX
1799 "hhuuhhuu bug in acpi video driver.\n");
1801 if (dev->brightness) {
1802 kfree(dev->brightness->levels);
1803 kfree(dev->brightness);
1805 list_del(&dev->entry);
1809 mutex_unlock(&video->device_list_lock);
1814 /* acpi_video interface */
1816 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1818 return acpi_video_bus_DOS(video, 0, 0);
1821 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1823 return acpi_video_bus_DOS(video, 0, 1);
1826 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1828 struct acpi_video_bus *video = data;
1829 struct acpi_device *device = NULL;
1830 struct input_dev *input;
1836 device = video->device;
1837 input = video->input;
1840 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1841 * most likely via hotkey. */
1842 acpi_bus_generate_proc_event(device, event, 0);
1843 keycode = KEY_SWITCHVIDEOMODE;
1846 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1848 acpi_video_device_enumerate(video);
1849 acpi_video_device_rebind(video);
1850 acpi_bus_generate_proc_event(device, event, 0);
1851 keycode = KEY_SWITCHVIDEOMODE;
1854 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1855 acpi_bus_generate_proc_event(device, event, 0);
1856 keycode = KEY_SWITCHVIDEOMODE;
1858 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1859 acpi_bus_generate_proc_event(device, event, 0);
1860 keycode = KEY_VIDEO_NEXT;
1862 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1863 acpi_bus_generate_proc_event(device, event, 0);
1864 keycode = KEY_VIDEO_PREV;
1868 keycode = KEY_UNKNOWN;
1869 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1870 "Unsupported event [0x%x]\n", event));
1874 acpi_notifier_call_chain(device, event, 0);
1875 input_report_key(input, keycode, 1);
1877 input_report_key(input, keycode, 0);
1883 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1885 struct acpi_video_device *video_device = data;
1886 struct acpi_device *device = NULL;
1887 struct acpi_video_bus *bus;
1888 struct input_dev *input;
1894 device = video_device->dev;
1895 bus = video_device->video;
1899 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1900 if (brightness_switch_enabled)
1901 acpi_video_switch_brightness(video_device, event);
1902 acpi_bus_generate_proc_event(device, event, 0);
1903 keycode = KEY_BRIGHTNESS_CYCLE;
1905 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1906 if (brightness_switch_enabled)
1907 acpi_video_switch_brightness(video_device, event);
1908 acpi_bus_generate_proc_event(device, event, 0);
1909 keycode = KEY_BRIGHTNESSUP;
1911 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1912 if (brightness_switch_enabled)
1913 acpi_video_switch_brightness(video_device, event);
1914 acpi_bus_generate_proc_event(device, event, 0);
1915 keycode = KEY_BRIGHTNESSDOWN;
1917 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1918 if (brightness_switch_enabled)
1919 acpi_video_switch_brightness(video_device, event);
1920 acpi_bus_generate_proc_event(device, event, 0);
1921 keycode = KEY_BRIGHTNESS_ZERO;
1923 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1924 if (brightness_switch_enabled)
1925 acpi_video_switch_brightness(video_device, event);
1926 acpi_bus_generate_proc_event(device, event, 0);
1927 keycode = KEY_DISPLAY_OFF;
1930 keycode = KEY_UNKNOWN;
1931 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1932 "Unsupported event [0x%x]\n", event));
1936 acpi_notifier_call_chain(device, event, 0);
1937 input_report_key(input, keycode, 1);
1939 input_report_key(input, keycode, 0);
1945 static int instance;
1946 static int acpi_video_resume(struct acpi_device *device)
1948 struct acpi_video_bus *video;
1949 struct acpi_video_device *video_device;
1952 if (!device || !acpi_driver_data(device))
1955 video = acpi_driver_data(device);
1957 for (i = 0; i < video->attached_count; i++) {
1958 video_device = video->attached_array[i].bind_info;
1959 if (video_device && video_device->backlight)
1960 acpi_video_set_brightness(video_device->backlight);
1965 static int acpi_video_bus_add(struct acpi_device *device)
1968 struct acpi_video_bus *video;
1969 struct input_dev *input;
1972 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1976 /* a hack to fix the duplicate name "VID" problem on T61 */
1977 if (!strcmp(device->pnp.bus_id, "VID")) {
1979 device->pnp.bus_id[3] = '0' + instance;
1983 video->device = device;
1984 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1985 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1986 acpi_driver_data(device) = video;
1988 acpi_video_bus_find_cap(video);
1989 error = acpi_video_bus_check(video);
1991 goto err_free_video;
1993 error = acpi_video_bus_add_fs(device);
1995 goto err_free_video;
1997 mutex_init(&video->device_list_lock);
1998 INIT_LIST_HEAD(&video->video_device_list);
2000 acpi_video_bus_get_devices(video, device);
2001 acpi_video_bus_start_devices(video);
2003 status = acpi_install_notify_handler(device->handle,
2005 acpi_video_bus_notify, video);
2006 if (ACPI_FAILURE(status)) {
2007 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
2008 "Error installing notify handler\n"));
2010 goto err_stop_video;
2013 video->input = input = input_allocate_device();
2016 goto err_uninstall_notify;
2019 snprintf(video->phys, sizeof(video->phys),
2020 "%s/video/input0", acpi_device_hid(video->device));
2022 input->name = acpi_device_name(video->device);
2023 input->phys = video->phys;
2024 input->id.bustype = BUS_HOST;
2025 input->id.product = 0x06;
2026 input->dev.parent = &device->dev;
2027 input->evbit[0] = BIT(EV_KEY);
2028 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2029 set_bit(KEY_VIDEO_NEXT, input->keybit);
2030 set_bit(KEY_VIDEO_PREV, input->keybit);
2031 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2032 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2033 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2034 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2035 set_bit(KEY_DISPLAY_OFF, input->keybit);
2036 set_bit(KEY_UNKNOWN, input->keybit);
2038 error = input_register_device(input);
2040 goto err_free_input_dev;
2042 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2043 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2044 video->flags.multihead ? "yes" : "no",
2045 video->flags.rom ? "yes" : "no",
2046 video->flags.post ? "yes" : "no");
2051 input_free_device(input);
2052 err_uninstall_notify:
2053 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2054 acpi_video_bus_notify);
2056 acpi_video_bus_stop_devices(video);
2057 acpi_video_bus_put_devices(video);
2058 kfree(video->attached_array);
2059 acpi_video_bus_remove_fs(device);
2062 acpi_driver_data(device) = NULL;
2067 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2069 acpi_status status = 0;
2070 struct acpi_video_bus *video = NULL;
2073 if (!device || !acpi_driver_data(device))
2076 video = acpi_driver_data(device);
2078 acpi_video_bus_stop_devices(video);
2080 status = acpi_remove_notify_handler(video->device->handle,
2082 acpi_video_bus_notify);
2084 acpi_video_bus_put_devices(video);
2085 acpi_video_bus_remove_fs(device);
2087 input_unregister_device(video->input);
2088 kfree(video->attached_array);
2094 static int __init acpi_video_init(void)
2100 acpi_dbg_level = 0xFFFFFFFF;
2101 acpi_dbg_layer = 0x08000000;
2104 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2105 if (!acpi_video_dir)
2107 acpi_video_dir->owner = THIS_MODULE;
2109 result = acpi_bus_register_driver(&acpi_video_bus);
2111 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2118 static void __exit acpi_video_exit(void)
2121 acpi_bus_unregister_driver(&acpi_video_bus);
2123 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2128 module_init(acpi_video_init);
2129 module_exit(acpi_video_exit);