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 ACPI_VIDEO_HEAD_INVALID (~0u - 1)
61 #define ACPI_VIDEO_HEAD_END (~0u)
62 #define MAX_NAME_LEN 20
64 #define ACPI_VIDEO_DISPLAY_CRT 1
65 #define ACPI_VIDEO_DISPLAY_TV 2
66 #define ACPI_VIDEO_DISPLAY_DVI 3
67 #define ACPI_VIDEO_DISPLAY_LCD 4
69 #define _COMPONENT ACPI_VIDEO_COMPONENT
70 ACPI_MODULE_NAME("video");
72 MODULE_AUTHOR("Bruno Ducrot");
73 MODULE_DESCRIPTION("ACPI Video Driver");
74 MODULE_LICENSE("GPL");
76 static int brightness_switch_enabled = 1;
77 module_param(brightness_switch_enabled, bool, 0644);
79 static int acpi_video_bus_add(struct acpi_device *device);
80 static int acpi_video_bus_remove(struct acpi_device *device, int type);
81 static int acpi_video_resume(struct acpi_device *device);
83 static const struct acpi_device_id video_device_ids[] = {
87 MODULE_DEVICE_TABLE(acpi, video_device_ids);
89 static struct acpi_driver acpi_video_bus = {
91 .class = ACPI_VIDEO_CLASS,
92 .ids = video_device_ids,
94 .add = acpi_video_bus_add,
95 .remove = acpi_video_bus_remove,
96 .resume = acpi_video_resume,
100 struct acpi_video_bus_flags {
101 u8 multihead:1; /* can switch video heads */
102 u8 rom:1; /* can retrieve a video rom */
103 u8 post:1; /* can configure the head to */
107 struct acpi_video_bus_cap {
108 u8 _DOS:1; /*Enable/Disable output switching */
109 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
110 u8 _ROM:1; /*Get ROM Data */
111 u8 _GPD:1; /*Get POST Device */
112 u8 _SPD:1; /*Set POST Device */
113 u8 _VPO:1; /*Video POST Options */
117 struct acpi_video_device_attrib {
118 u32 display_index:4; /* A zero-based instance of the Display */
119 u32 display_port_attachment:4; /*This field differentiates the display type */
120 u32 display_type:4; /*Describe the specific type in use */
121 u32 vendor_specific:4; /*Chipset Vendor Specific */
122 u32 bios_can_detect:1; /*BIOS can detect the device */
123 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
125 u32 pipe_id:3; /*For VGA multiple-head devices. */
126 u32 reserved:10; /*Must be 0 */
127 u32 device_id_scheme:1; /*Device ID Scheme */
130 struct acpi_video_enumerated_device {
133 struct acpi_video_device_attrib attrib;
135 struct acpi_video_device *bind_info;
138 struct acpi_video_bus {
139 struct acpi_device *device;
141 struct acpi_video_enumerated_device *attached_array;
143 struct acpi_video_bus_cap cap;
144 struct acpi_video_bus_flags flags;
145 struct list_head video_device_list;
146 struct mutex device_list_lock; /* protects video_device_list */
147 struct proc_dir_entry *dir;
148 struct input_dev *input;
149 char phys[32]; /* for input device */
152 struct acpi_video_device_flags {
162 struct acpi_video_device_cap {
163 u8 _ADR:1; /*Return the unique ID */
164 u8 _BCL:1; /*Query list of brightness control levels supported */
165 u8 _BCM:1; /*Set the brightness level */
166 u8 _BQC:1; /* Get current brightness level */
167 u8 _DDC:1; /*Return the EDID for this device */
168 u8 _DCS:1; /*Return status of output device */
169 u8 _DGS:1; /*Query graphics state */
170 u8 _DSS:1; /*Device state set */
173 struct acpi_video_device_brightness {
179 struct acpi_video_device {
180 unsigned long device_id;
181 struct acpi_video_device_flags flags;
182 struct acpi_video_device_cap cap;
183 struct list_head entry;
184 struct acpi_video_bus *video;
185 struct acpi_device *dev;
186 struct acpi_video_device_brightness *brightness;
187 struct backlight_device *backlight;
188 struct thermal_cooling_device *cdev;
189 struct output_device *output_dev;
193 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
194 static struct file_operations acpi_video_bus_info_fops = {
195 .open = acpi_video_bus_info_open_fs,
198 .release = single_release,
201 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
202 static struct file_operations acpi_video_bus_ROM_fops = {
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 .open = acpi_video_bus_POST_info_open_fs,
215 .release = single_release,
218 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
219 static struct file_operations acpi_video_bus_POST_fops = {
220 .open = acpi_video_bus_POST_open_fs,
223 .release = single_release,
226 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
227 static struct file_operations acpi_video_bus_DOS_fops = {
228 .open = acpi_video_bus_DOS_open_fs,
231 .release = single_release,
235 static int acpi_video_device_info_open_fs(struct inode *inode,
237 static struct file_operations acpi_video_device_info_fops = {
238 .open = acpi_video_device_info_open_fs,
241 .release = single_release,
244 static int acpi_video_device_state_open_fs(struct inode *inode,
246 static struct file_operations acpi_video_device_state_fops = {
247 .open = acpi_video_device_state_open_fs,
250 .release = single_release,
253 static int acpi_video_device_brightness_open_fs(struct inode *inode,
255 static struct file_operations acpi_video_device_brightness_fops = {
256 .open = acpi_video_device_brightness_open_fs,
259 .release = single_release,
262 static int acpi_video_device_EDID_open_fs(struct inode *inode,
264 static struct file_operations acpi_video_device_EDID_fops = {
265 .open = acpi_video_device_EDID_open_fs,
268 .release = single_release,
271 static char device_decode[][30] = {
272 "motherboard VGA device",
278 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
279 static void acpi_video_device_rebind(struct acpi_video_bus *video);
280 static void acpi_video_device_bind(struct acpi_video_bus *video,
281 struct acpi_video_device *device);
282 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
283 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
285 static int acpi_video_device_lcd_get_level_current(
286 struct acpi_video_device *device,
287 unsigned long *level);
288 static int acpi_video_get_next_level(struct acpi_video_device *device,
289 u32 level_current, u32 event);
290 static void acpi_video_switch_brightness(struct acpi_video_device *device,
292 static int acpi_video_device_get_state(struct acpi_video_device *device,
293 unsigned long *state);
294 static int acpi_video_output_get(struct output_device *od);
295 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
297 /*backlight device sysfs support*/
298 static int acpi_video_get_brightness(struct backlight_device *bd)
300 unsigned long cur_level;
302 struct acpi_video_device *vd =
303 (struct acpi_video_device *)bl_get_data(bd);
304 acpi_video_device_lcd_get_level_current(vd, &cur_level);
305 for (i = 2; i < vd->brightness->count; i++) {
306 if (vd->brightness->levels[i] == cur_level)
307 /* The first two entries are special - see page 575
308 of the ACPI spec 3.0 */
314 static int acpi_video_set_brightness(struct backlight_device *bd)
316 int request_level = bd->props.brightness+2;
317 struct acpi_video_device *vd =
318 (struct acpi_video_device *)bl_get_data(bd);
319 acpi_video_device_lcd_set_level(vd,
320 vd->brightness->levels[request_level]);
324 static struct backlight_ops acpi_backlight_ops = {
325 .get_brightness = acpi_video_get_brightness,
326 .update_status = acpi_video_set_brightness,
329 /*video output device sysfs support*/
330 static int acpi_video_output_get(struct output_device *od)
333 struct acpi_video_device *vd =
334 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
335 acpi_video_device_get_state(vd, &state);
339 static int acpi_video_output_set(struct output_device *od)
341 unsigned long state = od->request_state;
342 struct acpi_video_device *vd=
343 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
344 return acpi_video_device_set_state(vd, state);
347 static struct output_properties acpi_output_properties = {
348 .set_state = acpi_video_output_set,
349 .get_status = acpi_video_output_get,
353 /* thermal cooling device callbacks */
354 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
356 struct acpi_device *device = cdev->devdata;
357 struct acpi_video_device *video = acpi_driver_data(device);
359 return sprintf(buf, "%d\n", video->brightness->count - 3);
362 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
364 struct acpi_device *device = cdev->devdata;
365 struct acpi_video_device *video = acpi_driver_data(device);
369 acpi_video_device_lcd_get_level_current(video, &level);
370 for (state = 2; state < video->brightness->count; state++)
371 if (level == video->brightness->levels[state])
372 return sprintf(buf, "%d\n",
373 video->brightness->count - state - 1);
379 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
381 struct acpi_device *device = cdev->devdata;
382 struct acpi_video_device *video = acpi_driver_data(device);
385 if ( state >= video->brightness->count - 2)
388 state = video->brightness->count - state;
389 level = video->brightness->levels[state -1];
390 return acpi_video_device_lcd_set_level(video, level);
393 static struct thermal_cooling_device_ops video_cooling_ops = {
394 .get_max_state = video_get_max_state,
395 .get_cur_state = video_get_cur_state,
396 .set_cur_state = video_set_cur_state,
399 /* --------------------------------------------------------------------------
401 -------------------------------------------------------------------------- */
406 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
410 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
416 acpi_video_device_get_state(struct acpi_video_device *device,
417 unsigned long *state)
421 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
427 acpi_video_device_set_state(struct acpi_video_device *device, int state)
430 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
431 struct acpi_object_list args = { 1, &arg0 };
435 arg0.integer.value = state;
436 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
442 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
443 union acpi_object **levels)
446 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
447 union acpi_object *obj;
452 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
453 if (!ACPI_SUCCESS(status))
455 obj = (union acpi_object *)buffer.pointer;
456 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
457 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
467 kfree(buffer.pointer);
473 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
476 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
477 struct acpi_object_list args = { 1, &arg0 };
480 arg0.integer.value = level;
482 if (device->cap._BCM)
483 status = acpi_evaluate_object(device->dev->handle, "_BCM",
485 device->brightness->curr = level;
490 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
491 unsigned long *level)
493 if (device->cap._BQC)
494 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
496 *level = device->brightness->curr;
501 acpi_video_device_EDID(struct acpi_video_device *device,
502 union acpi_object **edid, ssize_t length)
505 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
506 union acpi_object *obj;
507 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
508 struct acpi_object_list args = { 1, &arg0 };
516 arg0.integer.value = 1;
517 else if (length == 256)
518 arg0.integer.value = 2;
522 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
523 if (ACPI_FAILURE(status))
526 obj = buffer.pointer;
528 if (obj && obj->type == ACPI_TYPE_BUFFER)
531 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
542 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
546 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
547 struct acpi_object_list args = { 1, &arg0 };
550 arg0.integer.value = option;
552 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
553 if (ACPI_SUCCESS(status))
554 status = tmp ? (-EINVAL) : (AE_OK);
560 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
564 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
570 acpi_video_bus_POST_options(struct acpi_video_bus *video,
571 unsigned long *options)
575 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
583 * video : video bus device pointer
585 * 0. The system BIOS should NOT automatically switch(toggle)
586 * the active display output.
587 * 1. The system BIOS should automatically switch (toggle) the
588 * active display output. No switch event.
589 * 2. The _DGS value should be locked.
590 * 3. The system BIOS should not automatically switch (toggle) the
591 * active display output, but instead generate the display switch
594 * 0. The system BIOS should automatically control the brightness level
595 * of the LCD when the power changes from AC to DC
596 * 1. The system BIOS should NOT automatically control the brightness
597 * level of the LCD when the power changes from AC to DC.
603 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
605 acpi_integer status = 0;
606 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
607 struct acpi_object_list args = { 1, &arg0 };
610 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
614 arg0.integer.value = (lcd_flag << 2) | bios_flag;
615 video->dos_setting = arg0.integer.value;
616 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
624 * device : video output device (LCD, CRT, ..)
629 * Find out all required AML methods defined under the output
633 static void acpi_video_device_find_cap(struct acpi_video_device *device)
635 acpi_handle h_dummy1;
638 union acpi_object *obj = NULL;
639 struct acpi_video_device_brightness *br = NULL;
642 memset(&device->cap, 0, sizeof(device->cap));
644 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
645 device->cap._ADR = 1;
647 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
648 device->cap._BCL = 1;
650 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
651 device->cap._BCM = 1;
653 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
654 device->cap._BQC = 1;
655 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
656 device->cap._DDC = 1;
658 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
659 device->cap._DCS = 1;
661 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
662 device->cap._DGS = 1;
664 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
665 device->cap._DSS = 1;
668 if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
670 if (obj->package.count >= 2) {
672 union acpi_object *o;
674 br = kzalloc(sizeof(*br), GFP_KERNEL);
676 printk(KERN_ERR "can't allocate memory\n");
678 br->levels = kmalloc(obj->package.count *
679 sizeof *(br->levels), GFP_KERNEL);
683 for (i = 0; i < obj->package.count; i++) {
684 o = (union acpi_object *)&obj->package.
686 if (o->type != ACPI_TYPE_INTEGER) {
687 printk(KERN_ERR PREFIX "Invalid data\n");
690 br->levels[count] = (u32) o->integer.value;
692 if (br->levels[count] > max_level)
693 max_level = br->levels[count];
702 device->brightness = br;
703 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
704 "found %d brightness levels\n",
711 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
716 if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
718 static int count = 0;
720 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
724 sprintf(name, "acpi_video%d", count++);
725 device->backlight = backlight_device_register(name,
726 NULL, device, &acpi_backlight_ops);
727 device->backlight->props.max_brightness = device->brightness->count-3;
728 device->backlight->props.brightness = acpi_video_get_brightness(device->backlight);
729 backlight_update_status(device->backlight);
732 device->cdev = thermal_cooling_device_register("LCD",
733 device->dev, &video_cooling_ops);
734 if (IS_ERR(device->cdev))
737 printk(KERN_INFO PREFIX
738 "%s is registered as cooling_device%d\n",
739 device->dev->dev.bus_id, device->cdev->id);
740 result = sysfs_create_link(&device->dev->dev.kobj,
741 &device->cdev->device.kobj,
744 printk(KERN_ERR PREFIX "Create sysfs link\n");
745 result = sysfs_create_link(&device->cdev->device.kobj,
746 &device->dev->dev.kobj, "device");
748 printk(KERN_ERR PREFIX "Create sysfs link\n");
751 if (device->cap._DCS && device->cap._DSS){
752 static int count = 0;
754 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
757 sprintf(name, "acpi_video%d", count++);
758 device->output_dev = video_output_register(name,
759 NULL, device, &acpi_output_properties);
767 * device : video output device (VGA)
772 * Find out all required AML methods defined under the video bus device.
775 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
777 acpi_handle h_dummy1;
779 memset(&video->cap, 0, sizeof(video->cap));
780 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
783 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
786 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
789 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
792 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
795 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
801 * Check whether the video bus device has required AML method to
802 * support the desired features
805 static int acpi_video_bus_check(struct acpi_video_bus *video)
807 acpi_status status = -ENOENT;
813 /* Since there is no HID, CID and so on for VGA driver, we have
814 * to check well known required nodes.
817 /* Does this device support video switching? */
818 if (video->cap._DOS) {
819 video->flags.multihead = 1;
823 /* Does this device support retrieving a video ROM? */
824 if (video->cap._ROM) {
825 video->flags.rom = 1;
829 /* Does this device support configuring which video device to POST? */
830 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
831 video->flags.post = 1;
838 /* --------------------------------------------------------------------------
840 -------------------------------------------------------------------------- */
842 static struct proc_dir_entry *acpi_video_dir;
846 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
848 struct acpi_video_device *dev = seq->private;
854 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
855 seq_printf(seq, "type: ");
857 seq_printf(seq, "CRT\n");
858 else if (dev->flags.lcd)
859 seq_printf(seq, "LCD\n");
860 else if (dev->flags.tvout)
861 seq_printf(seq, "TVOUT\n");
862 else if (dev->flags.dvi)
863 seq_printf(seq, "DVI\n");
865 seq_printf(seq, "UNKNOWN\n");
867 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
874 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
876 return single_open(file, acpi_video_device_info_seq_show,
880 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
883 struct acpi_video_device *dev = seq->private;
890 status = acpi_video_device_get_state(dev, &state);
891 seq_printf(seq, "state: ");
892 if (ACPI_SUCCESS(status))
893 seq_printf(seq, "0x%02lx\n", state);
895 seq_printf(seq, "<not supported>\n");
897 status = acpi_video_device_query(dev, &state);
898 seq_printf(seq, "query: ");
899 if (ACPI_SUCCESS(status))
900 seq_printf(seq, "0x%02lx\n", state);
902 seq_printf(seq, "<not supported>\n");
909 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
911 return single_open(file, acpi_video_device_state_seq_show,
916 acpi_video_device_write_state(struct file *file,
917 const char __user * buffer,
918 size_t count, loff_t * data)
921 struct seq_file *m = file->private_data;
922 struct acpi_video_device *dev = m->private;
923 char str[12] = { 0 };
927 if (!dev || count + 1 > sizeof str)
930 if (copy_from_user(str, buffer, count))
934 state = simple_strtoul(str, NULL, 0);
935 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
937 status = acpi_video_device_set_state(dev, state);
946 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
948 struct acpi_video_device *dev = seq->private;
952 if (!dev || !dev->brightness) {
953 seq_printf(seq, "<not supported>\n");
957 seq_printf(seq, "levels: ");
958 for (i = 0; i < dev->brightness->count; i++)
959 seq_printf(seq, " %d", dev->brightness->levels[i]);
960 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
966 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
968 return single_open(file, acpi_video_device_brightness_seq_show,
973 acpi_video_device_write_brightness(struct file *file,
974 const char __user * buffer,
975 size_t count, loff_t * data)
977 struct seq_file *m = file->private_data;
978 struct acpi_video_device *dev = m->private;
980 unsigned int level = 0;
984 if (!dev || !dev->brightness || count + 1 > sizeof str)
987 if (copy_from_user(str, buffer, count))
991 level = simple_strtoul(str, NULL, 0);
996 /* validate through the list of available levels */
997 for (i = 0; i < dev->brightness->count; i++)
998 if (level == dev->brightness->levels[i]) {
1000 (acpi_video_device_lcd_set_level(dev, level)))
1001 dev->brightness->curr = level;
1008 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1010 struct acpi_video_device *dev = seq->private;
1013 union acpi_object *edid = NULL;
1019 status = acpi_video_device_EDID(dev, &edid, 128);
1020 if (ACPI_FAILURE(status)) {
1021 status = acpi_video_device_EDID(dev, &edid, 256);
1024 if (ACPI_FAILURE(status)) {
1028 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1029 for (i = 0; i < edid->buffer.length; i++)
1030 seq_putc(seq, edid->buffer.pointer[i]);
1035 seq_printf(seq, "<not supported>\n");
1043 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1045 return single_open(file, acpi_video_device_EDID_seq_show,
1049 static int acpi_video_device_add_fs(struct acpi_device *device)
1051 struct proc_dir_entry *entry = NULL;
1052 struct acpi_video_device *vid_dev;
1058 vid_dev = acpi_driver_data(device);
1062 if (!acpi_device_dir(device)) {
1063 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1064 vid_dev->video->dir);
1065 if (!acpi_device_dir(device))
1067 acpi_device_dir(device)->owner = THIS_MODULE;
1071 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1075 entry->proc_fops = &acpi_video_device_info_fops;
1076 entry->data = acpi_driver_data(device);
1077 entry->owner = THIS_MODULE;
1082 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
1083 acpi_device_dir(device));
1087 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1088 entry->proc_fops = &acpi_video_device_state_fops;
1089 entry->data = acpi_driver_data(device);
1090 entry->owner = THIS_MODULE;
1093 /* 'brightness' [R/W] */
1095 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1096 acpi_device_dir(device));
1100 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
1101 entry->proc_fops = &acpi_video_device_brightness_fops;
1102 entry->data = acpi_driver_data(device);
1103 entry->owner = THIS_MODULE;
1107 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
1111 entry->proc_fops = &acpi_video_device_EDID_fops;
1112 entry->data = acpi_driver_data(device);
1113 entry->owner = THIS_MODULE;
1119 static int acpi_video_device_remove_fs(struct acpi_device *device)
1121 struct acpi_video_device *vid_dev;
1123 vid_dev = acpi_driver_data(device);
1124 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1127 if (acpi_device_dir(device)) {
1128 remove_proc_entry("info", acpi_device_dir(device));
1129 remove_proc_entry("state", acpi_device_dir(device));
1130 remove_proc_entry("brightness", acpi_device_dir(device));
1131 remove_proc_entry("EDID", acpi_device_dir(device));
1132 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1133 acpi_device_dir(device) = NULL;
1140 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1142 struct acpi_video_bus *video = seq->private;
1148 seq_printf(seq, "Switching heads: %s\n",
1149 video->flags.multihead ? "yes" : "no");
1150 seq_printf(seq, "Video ROM: %s\n",
1151 video->flags.rom ? "yes" : "no");
1152 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1153 video->flags.post ? "yes" : "no");
1159 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1161 return single_open(file, acpi_video_bus_info_seq_show,
1165 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1167 struct acpi_video_bus *video = seq->private;
1173 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1174 seq_printf(seq, "<TODO>\n");
1180 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1182 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1185 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1187 struct acpi_video_bus *video = seq->private;
1188 unsigned long options;
1195 status = acpi_video_bus_POST_options(video, &options);
1196 if (ACPI_SUCCESS(status)) {
1197 if (!(options & 1)) {
1198 printk(KERN_WARNING PREFIX
1199 "The motherboard VGA device is not listed as a possible POST device.\n");
1200 printk(KERN_WARNING PREFIX
1201 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1203 printk("%lx\n", options);
1204 seq_printf(seq, "can POST: <integrated video>");
1206 seq_printf(seq, " <PCI video>");
1208 seq_printf(seq, " <AGP video>");
1209 seq_putc(seq, '\n');
1211 seq_printf(seq, "<not supported>\n");
1217 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1219 return single_open(file, acpi_video_bus_POST_info_seq_show,
1223 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1225 struct acpi_video_bus *video = seq->private;
1233 status = acpi_video_bus_get_POST(video, &id);
1234 if (!ACPI_SUCCESS(status)) {
1235 seq_printf(seq, "<not supported>\n");
1238 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1244 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1246 struct acpi_video_bus *video = seq->private;
1249 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1254 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1256 return single_open(file, acpi_video_bus_POST_seq_show,
1260 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1262 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1266 acpi_video_bus_write_POST(struct file *file,
1267 const char __user * buffer,
1268 size_t count, loff_t * data)
1271 struct seq_file *m = file->private_data;
1272 struct acpi_video_bus *video = m->private;
1273 char str[12] = { 0 };
1274 unsigned long opt, options;
1277 if (!video || count + 1 > sizeof str)
1280 status = acpi_video_bus_POST_options(video, &options);
1281 if (!ACPI_SUCCESS(status))
1284 if (copy_from_user(str, buffer, count))
1288 opt = strtoul(str, NULL, 0);
1292 /* just in case an OEM 'forgot' the motherboard... */
1295 if (options & (1ul << opt)) {
1296 status = acpi_video_bus_set_POST(video, opt);
1297 if (!ACPI_SUCCESS(status))
1306 acpi_video_bus_write_DOS(struct file *file,
1307 const char __user * buffer,
1308 size_t count, loff_t * data)
1311 struct seq_file *m = file->private_data;
1312 struct acpi_video_bus *video = m->private;
1313 char str[12] = { 0 };
1317 if (!video || count + 1 > sizeof str)
1320 if (copy_from_user(str, buffer, count))
1324 opt = strtoul(str, NULL, 0);
1328 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1330 if (!ACPI_SUCCESS(status))
1336 static int acpi_video_bus_add_fs(struct acpi_device *device)
1338 struct proc_dir_entry *entry = NULL;
1339 struct acpi_video_bus *video;
1342 video = acpi_driver_data(device);
1344 if (!acpi_device_dir(device)) {
1345 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1347 if (!acpi_device_dir(device))
1349 video->dir = acpi_device_dir(device);
1350 acpi_device_dir(device)->owner = THIS_MODULE;
1354 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1358 entry->proc_fops = &acpi_video_bus_info_fops;
1359 entry->data = acpi_driver_data(device);
1360 entry->owner = THIS_MODULE;
1364 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1368 entry->proc_fops = &acpi_video_bus_ROM_fops;
1369 entry->data = acpi_driver_data(device);
1370 entry->owner = THIS_MODULE;
1373 /* 'POST_info' [R] */
1375 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1379 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1380 entry->data = acpi_driver_data(device);
1381 entry->owner = THIS_MODULE;
1386 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1387 acpi_device_dir(device));
1391 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1392 entry->proc_fops = &acpi_video_bus_POST_fops;
1393 entry->data = acpi_driver_data(device);
1394 entry->owner = THIS_MODULE;
1399 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1400 acpi_device_dir(device));
1404 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1405 entry->proc_fops = &acpi_video_bus_DOS_fops;
1406 entry->data = acpi_driver_data(device);
1407 entry->owner = THIS_MODULE;
1413 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1415 struct acpi_video_bus *video;
1418 video = acpi_driver_data(device);
1420 if (acpi_device_dir(device)) {
1421 remove_proc_entry("info", acpi_device_dir(device));
1422 remove_proc_entry("ROM", acpi_device_dir(device));
1423 remove_proc_entry("POST_info", acpi_device_dir(device));
1424 remove_proc_entry("POST", acpi_device_dir(device));
1425 remove_proc_entry("DOS", acpi_device_dir(device));
1426 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1427 acpi_device_dir(device) = NULL;
1433 /* --------------------------------------------------------------------------
1435 -------------------------------------------------------------------------- */
1437 /* device interface */
1438 static struct acpi_video_device_attrib*
1439 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1443 for(count = 0; count < video->attached_count; count++)
1444 if((video->attached_array[count].value.int_val & 0xffff) == device_id)
1445 return &(video->attached_array[count].value.attrib);
1450 acpi_video_bus_get_one_device(struct acpi_device *device,
1451 struct acpi_video_bus *video)
1453 unsigned long device_id;
1455 struct acpi_video_device *data;
1456 struct acpi_video_device_attrib* attribute;
1458 if (!device || !video)
1462 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1463 if (ACPI_SUCCESS(status)) {
1465 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1469 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1470 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1471 acpi_driver_data(device) = data;
1473 data->device_id = device_id;
1474 data->video = video;
1477 attribute = acpi_video_get_device_attr(video, device_id);
1479 if((attribute != NULL) && attribute->device_id_scheme) {
1480 switch (attribute->display_type) {
1481 case ACPI_VIDEO_DISPLAY_CRT:
1482 data->flags.crt = 1;
1484 case ACPI_VIDEO_DISPLAY_TV:
1485 data->flags.tvout = 1;
1487 case ACPI_VIDEO_DISPLAY_DVI:
1488 data->flags.dvi = 1;
1490 case ACPI_VIDEO_DISPLAY_LCD:
1491 data->flags.lcd = 1;
1494 data->flags.unknown = 1;
1497 if(attribute->bios_can_detect)
1498 data->flags.bios = 1;
1500 data->flags.unknown = 1;
1502 acpi_video_device_bind(video, data);
1503 acpi_video_device_find_cap(data);
1505 status = acpi_install_notify_handler(device->handle,
1507 acpi_video_device_notify,
1509 if (ACPI_FAILURE(status)) {
1510 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1511 "Error installing notify handler\n"));
1512 if(data->brightness)
1513 kfree(data->brightness->levels);
1514 kfree(data->brightness);
1519 mutex_lock(&video->device_list_lock);
1520 list_add_tail(&data->entry, &video->video_device_list);
1521 mutex_unlock(&video->device_list_lock);
1523 acpi_video_device_add_fs(device);
1533 * video : video bus device
1538 * Enumerate the video device list of the video bus,
1539 * bind the ids with the corresponding video devices
1540 * under the video bus.
1543 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1545 struct acpi_video_device *dev;
1547 mutex_lock(&video->device_list_lock);
1549 list_for_each_entry(dev, &video->video_device_list, entry)
1550 acpi_video_device_bind(video, dev);
1552 mutex_unlock(&video->device_list_lock);
1557 * video : video bus device
1558 * device : video output device under the video
1564 * Bind the ids with the corresponding video devices
1565 * under the video bus.
1569 acpi_video_device_bind(struct acpi_video_bus *video,
1570 struct acpi_video_device *device)
1574 #define IDS_VAL(i) video->attached_array[i].value.int_val
1575 #define IDS_BIND(i) video->attached_array[i].bind_info
1577 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1578 i < video->attached_count; i++) {
1579 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1580 IDS_BIND(i) = device;
1581 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1590 * video : video bus device
1595 * Call _DOD to enumerate all devices attached to display adapter
1599 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1604 struct acpi_video_enumerated_device *active_device_list;
1605 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1606 union acpi_object *dod = NULL;
1607 union acpi_object *obj;
1609 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1610 if (!ACPI_SUCCESS(status)) {
1611 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1615 dod = buffer.pointer;
1616 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1617 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1622 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1623 dod->package.count));
1625 active_device_list = kmalloc((1 +
1626 dod->package.count) *
1628 acpi_video_enumerated_device),
1631 if (!active_device_list) {
1637 for (i = 0; i < dod->package.count; i++) {
1638 obj = &dod->package.elements[i];
1640 if (obj->type != ACPI_TYPE_INTEGER) {
1641 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1642 active_device_list[i].value.int_val =
1643 ACPI_VIDEO_HEAD_INVALID;
1645 active_device_list[i].value.int_val = obj->integer.value;
1646 active_device_list[i].bind_info = NULL;
1647 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1648 (int)obj->integer.value));
1651 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1653 kfree(video->attached_array);
1655 video->attached_array = active_device_list;
1656 video->attached_count = count;
1658 kfree(buffer.pointer);
1663 acpi_video_get_next_level(struct acpi_video_device *device,
1664 u32 level_current, u32 event)
1666 int min, max, min_above, max_below, i, l, delta = 255;
1667 max = max_below = 0;
1668 min = min_above = 255;
1669 /* Find closest level to level_current */
1670 for (i = 0; i < device->brightness->count; i++) {
1671 l = device->brightness->levels[i];
1672 if (abs(l - level_current) < abs(delta)) {
1673 delta = l - level_current;
1678 /* Ajust level_current to closest available level */
1679 level_current += delta;
1680 for (i = 0; i < device->brightness->count; i++) {
1681 l = device->brightness->levels[i];
1686 if (l < min_above && l > level_current)
1688 if (l > max_below && l < level_current)
1693 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1694 return (level_current < max) ? min_above : min;
1695 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1696 return (level_current < max) ? min_above : max;
1697 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1698 return (level_current > min) ? max_below : min;
1699 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1700 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1703 return level_current;
1708 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1710 unsigned long level_current, level_next;
1711 acpi_video_device_lcd_get_level_current(device, &level_current);
1712 level_next = acpi_video_get_next_level(device, level_current, event);
1713 acpi_video_device_lcd_set_level(device, level_next);
1717 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1718 struct acpi_device *device)
1721 struct acpi_device *dev;
1723 acpi_video_device_enumerate(video);
1725 list_for_each_entry(dev, &device->children, node) {
1727 status = acpi_video_bus_get_one_device(dev, video);
1728 if (ACPI_FAILURE(status)) {
1729 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1736 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1739 struct acpi_video_bus *video;
1742 if (!device || !device->video)
1745 video = device->video;
1747 acpi_video_device_remove_fs(device->dev);
1749 status = acpi_remove_notify_handler(device->dev->handle,
1751 acpi_video_device_notify);
1752 backlight_device_unregister(device->backlight);
1754 sysfs_remove_link(&device->dev->dev.kobj,
1756 sysfs_remove_link(&device->cdev->device.kobj,
1758 thermal_cooling_device_unregister(device->cdev);
1759 device->cdev = NULL;
1761 video_output_unregister(device->output_dev);
1766 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1769 struct acpi_video_device *dev, *next;
1771 mutex_lock(&video->device_list_lock);
1773 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1775 status = acpi_video_bus_put_one_device(dev);
1776 if (ACPI_FAILURE(status))
1777 printk(KERN_WARNING PREFIX
1778 "hhuuhhuu bug in acpi video driver.\n");
1780 if (dev->brightness) {
1781 kfree(dev->brightness->levels);
1782 kfree(dev->brightness);
1784 list_del(&dev->entry);
1788 mutex_unlock(&video->device_list_lock);
1793 /* acpi_video interface */
1795 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1797 return acpi_video_bus_DOS(video, 0, 0);
1800 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1802 return acpi_video_bus_DOS(video, 0, 1);
1805 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1807 struct acpi_video_bus *video = data;
1808 struct acpi_device *device = NULL;
1809 struct input_dev *input;
1815 device = video->device;
1816 input = video->input;
1819 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1820 * most likely via hotkey. */
1821 acpi_bus_generate_proc_event(device, event, 0);
1822 keycode = KEY_SWITCHVIDEOMODE;
1825 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1827 acpi_video_device_enumerate(video);
1828 acpi_video_device_rebind(video);
1829 acpi_bus_generate_proc_event(device, event, 0);
1830 keycode = KEY_SWITCHVIDEOMODE;
1833 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1834 acpi_bus_generate_proc_event(device, event, 0);
1835 keycode = KEY_SWITCHVIDEOMODE;
1837 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1838 acpi_bus_generate_proc_event(device, event, 0);
1839 keycode = KEY_VIDEO_NEXT;
1841 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1842 acpi_bus_generate_proc_event(device, event, 0);
1843 keycode = KEY_VIDEO_PREV;
1847 keycode = KEY_UNKNOWN;
1848 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1849 "Unsupported event [0x%x]\n", event));
1853 acpi_notifier_call_chain(device, event, 0);
1854 input_report_key(input, keycode, 1);
1856 input_report_key(input, keycode, 0);
1862 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1864 struct acpi_video_device *video_device = data;
1865 struct acpi_device *device = NULL;
1866 struct acpi_video_bus *bus;
1867 struct input_dev *input;
1873 device = video_device->dev;
1874 bus = video_device->video;
1878 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1879 if (brightness_switch_enabled)
1880 acpi_video_switch_brightness(video_device, event);
1881 acpi_bus_generate_proc_event(device, event, 0);
1882 keycode = KEY_BRIGHTNESS_CYCLE;
1884 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1885 if (brightness_switch_enabled)
1886 acpi_video_switch_brightness(video_device, event);
1887 acpi_bus_generate_proc_event(device, event, 0);
1888 keycode = KEY_BRIGHTNESSUP;
1890 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1891 if (brightness_switch_enabled)
1892 acpi_video_switch_brightness(video_device, event);
1893 acpi_bus_generate_proc_event(device, event, 0);
1894 keycode = KEY_BRIGHTNESSDOWN;
1896 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1897 if (brightness_switch_enabled)
1898 acpi_video_switch_brightness(video_device, event);
1899 acpi_bus_generate_proc_event(device, event, 0);
1900 keycode = KEY_BRIGHTNESS_ZERO;
1902 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1903 if (brightness_switch_enabled)
1904 acpi_video_switch_brightness(video_device, event);
1905 acpi_bus_generate_proc_event(device, event, 0);
1906 keycode = KEY_DISPLAY_OFF;
1909 keycode = KEY_UNKNOWN;
1910 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1911 "Unsupported event [0x%x]\n", event));
1915 acpi_notifier_call_chain(device, event, 0);
1916 input_report_key(input, keycode, 1);
1918 input_report_key(input, keycode, 0);
1924 static int instance;
1925 static int acpi_video_resume(struct acpi_device *device)
1927 struct acpi_video_bus *video;
1928 struct acpi_video_device *video_device;
1931 if (!device || !acpi_driver_data(device))
1934 video = acpi_driver_data(device);
1936 for (i = 0; i < video->attached_count; i++) {
1937 video_device = video->attached_array[i].bind_info;
1938 if (video_device && video_device->backlight)
1939 acpi_video_set_brightness(video_device->backlight);
1944 static int acpi_video_bus_add(struct acpi_device *device)
1947 struct acpi_video_bus *video;
1948 struct input_dev *input;
1951 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1955 /* a hack to fix the duplicate name "VID" problem on T61 */
1956 if (!strcmp(device->pnp.bus_id, "VID")) {
1958 device->pnp.bus_id[3] = '0' + instance;
1962 video->device = device;
1963 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1964 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1965 acpi_driver_data(device) = video;
1967 acpi_video_bus_find_cap(video);
1968 error = acpi_video_bus_check(video);
1970 goto err_free_video;
1972 error = acpi_video_bus_add_fs(device);
1974 goto err_free_video;
1976 mutex_init(&video->device_list_lock);
1977 INIT_LIST_HEAD(&video->video_device_list);
1979 acpi_video_bus_get_devices(video, device);
1980 acpi_video_bus_start_devices(video);
1982 status = acpi_install_notify_handler(device->handle,
1984 acpi_video_bus_notify, video);
1985 if (ACPI_FAILURE(status)) {
1986 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1987 "Error installing notify handler\n"));
1989 goto err_stop_video;
1992 video->input = input = input_allocate_device();
1995 goto err_uninstall_notify;
1998 snprintf(video->phys, sizeof(video->phys),
1999 "%s/video/input0", acpi_device_hid(video->device));
2001 input->name = acpi_device_name(video->device);
2002 input->phys = video->phys;
2003 input->id.bustype = BUS_HOST;
2004 input->id.product = 0x06;
2005 input->dev.parent = &device->dev;
2006 input->evbit[0] = BIT(EV_KEY);
2007 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2008 set_bit(KEY_VIDEO_NEXT, input->keybit);
2009 set_bit(KEY_VIDEO_PREV, input->keybit);
2010 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2011 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2012 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2013 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2014 set_bit(KEY_DISPLAY_OFF, input->keybit);
2015 set_bit(KEY_UNKNOWN, input->keybit);
2017 error = input_register_device(input);
2019 goto err_free_input_dev;
2021 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2022 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2023 video->flags.multihead ? "yes" : "no",
2024 video->flags.rom ? "yes" : "no",
2025 video->flags.post ? "yes" : "no");
2030 input_free_device(input);
2031 err_uninstall_notify:
2032 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2033 acpi_video_bus_notify);
2035 acpi_video_bus_stop_devices(video);
2036 acpi_video_bus_put_devices(video);
2037 kfree(video->attached_array);
2038 acpi_video_bus_remove_fs(device);
2041 acpi_driver_data(device) = NULL;
2046 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2048 acpi_status status = 0;
2049 struct acpi_video_bus *video = NULL;
2052 if (!device || !acpi_driver_data(device))
2055 video = acpi_driver_data(device);
2057 acpi_video_bus_stop_devices(video);
2059 status = acpi_remove_notify_handler(video->device->handle,
2061 acpi_video_bus_notify);
2063 acpi_video_bus_put_devices(video);
2064 acpi_video_bus_remove_fs(device);
2066 input_unregister_device(video->input);
2067 kfree(video->attached_array);
2073 static int __init acpi_video_init(void)
2079 acpi_dbg_level = 0xFFFFFFFF;
2080 acpi_dbg_layer = 0x08000000;
2083 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2084 if (!acpi_video_dir)
2086 acpi_video_dir->owner = THIS_MODULE;
2088 result = acpi_bus_register_driver(&acpi_video_bus);
2090 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2097 static void __exit acpi_video_exit(void)
2100 acpi_bus_unregister_driver(&acpi_video_bus);
2102 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2107 module_init(acpi_video_init);
2108 module_exit(acpi_video_exit);