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 acpi_video_bus_add(struct acpi_device *device);
77 static int acpi_video_bus_remove(struct acpi_device *device, int type);
79 static const struct acpi_device_id video_device_ids[] = {
83 MODULE_DEVICE_TABLE(acpi, video_device_ids);
85 static struct acpi_driver acpi_video_bus = {
87 .class = ACPI_VIDEO_CLASS,
88 .ids = video_device_ids,
90 .add = acpi_video_bus_add,
91 .remove = acpi_video_bus_remove,
95 struct acpi_video_bus_flags {
96 u8 multihead:1; /* can switch video heads */
97 u8 rom:1; /* can retrieve a video rom */
98 u8 post:1; /* can configure the head to */
102 struct acpi_video_bus_cap {
103 u8 _DOS:1; /*Enable/Disable output switching */
104 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
105 u8 _ROM:1; /*Get ROM Data */
106 u8 _GPD:1; /*Get POST Device */
107 u8 _SPD:1; /*Set POST Device */
108 u8 _VPO:1; /*Video POST Options */
112 struct acpi_video_device_attrib {
113 u32 display_index:4; /* A zero-based instance of the Display */
114 u32 display_port_attachment:4; /*This field differentiates the display type */
115 u32 display_type:4; /*Describe the specific type in use */
116 u32 vendor_specific:4; /*Chipset Vendor Specific */
117 u32 bios_can_detect:1; /*BIOS can detect the device */
118 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
120 u32 pipe_id:3; /*For VGA multiple-head devices. */
121 u32 reserved:10; /*Must be 0 */
122 u32 device_id_scheme:1; /*Device ID Scheme */
125 struct acpi_video_enumerated_device {
128 struct acpi_video_device_attrib attrib;
130 struct acpi_video_device *bind_info;
133 struct acpi_video_bus {
134 struct acpi_device *device;
136 struct acpi_video_enumerated_device *attached_array;
138 struct acpi_video_bus_cap cap;
139 struct acpi_video_bus_flags flags;
140 struct list_head video_device_list;
141 struct mutex device_list_lock; /* protects video_device_list */
142 struct proc_dir_entry *dir;
143 struct input_dev *input;
144 char phys[32]; /* for input device */
147 struct acpi_video_device_flags {
157 struct acpi_video_device_cap {
158 u8 _ADR:1; /*Return the unique ID */
159 u8 _BCL:1; /*Query list of brightness control levels supported */
160 u8 _BCM:1; /*Set the brightness level */
161 u8 _BQC:1; /* Get current brightness level */
162 u8 _DDC:1; /*Return the EDID for this device */
163 u8 _DCS:1; /*Return status of output device */
164 u8 _DGS:1; /*Query graphics state */
165 u8 _DSS:1; /*Device state set */
168 struct acpi_video_device_brightness {
174 struct acpi_video_device {
175 unsigned long device_id;
176 struct acpi_video_device_flags flags;
177 struct acpi_video_device_cap cap;
178 struct list_head entry;
179 struct acpi_video_bus *video;
180 struct acpi_device *dev;
181 struct acpi_video_device_brightness *brightness;
182 struct backlight_device *backlight;
183 struct thermal_cooling_device *cdev;
184 struct output_device *output_dev;
188 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
189 static struct file_operations acpi_video_bus_info_fops = {
190 .open = acpi_video_bus_info_open_fs,
193 .release = single_release,
196 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
197 static struct file_operations acpi_video_bus_ROM_fops = {
198 .open = acpi_video_bus_ROM_open_fs,
201 .release = single_release,
204 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
206 static struct file_operations acpi_video_bus_POST_info_fops = {
207 .open = acpi_video_bus_POST_info_open_fs,
210 .release = single_release,
213 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
214 static struct file_operations acpi_video_bus_POST_fops = {
215 .open = acpi_video_bus_POST_open_fs,
218 .release = single_release,
221 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
222 static struct file_operations acpi_video_bus_DOS_fops = {
223 .open = acpi_video_bus_DOS_open_fs,
226 .release = single_release,
230 static int acpi_video_device_info_open_fs(struct inode *inode,
232 static struct file_operations acpi_video_device_info_fops = {
233 .open = acpi_video_device_info_open_fs,
236 .release = single_release,
239 static int acpi_video_device_state_open_fs(struct inode *inode,
241 static struct file_operations acpi_video_device_state_fops = {
242 .open = acpi_video_device_state_open_fs,
245 .release = single_release,
248 static int acpi_video_device_brightness_open_fs(struct inode *inode,
250 static struct file_operations acpi_video_device_brightness_fops = {
251 .open = acpi_video_device_brightness_open_fs,
254 .release = single_release,
257 static int acpi_video_device_EDID_open_fs(struct inode *inode,
259 static struct file_operations acpi_video_device_EDID_fops = {
260 .open = acpi_video_device_EDID_open_fs,
263 .release = single_release,
266 static char device_decode[][30] = {
267 "motherboard VGA device",
273 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
274 static void acpi_video_device_rebind(struct acpi_video_bus *video);
275 static void acpi_video_device_bind(struct acpi_video_bus *video,
276 struct acpi_video_device *device);
277 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
278 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
279 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
281 static int acpi_video_device_lcd_get_level_current(
282 struct acpi_video_device *device,
283 unsigned long *level);
284 static int acpi_video_get_next_level(struct acpi_video_device *device,
285 u32 level_current, u32 event);
286 static void acpi_video_switch_brightness(struct acpi_video_device *device,
288 static int acpi_video_device_get_state(struct acpi_video_device *device,
289 unsigned long *state);
290 static int acpi_video_output_get(struct output_device *od);
291 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
293 /*backlight device sysfs support*/
294 static int acpi_video_get_brightness(struct backlight_device *bd)
296 unsigned long cur_level;
298 struct acpi_video_device *vd =
299 (struct acpi_video_device *)bl_get_data(bd);
300 acpi_video_device_lcd_get_level_current(vd, &cur_level);
301 for (i = 2; i < vd->brightness->count; i++) {
302 if (vd->brightness->levels[i] == cur_level)
303 /* The first two entries are special - see page 575
304 of the ACPI spec 3.0 */
310 static int acpi_video_set_brightness(struct backlight_device *bd)
312 int request_level = bd->props.brightness+2;
313 struct acpi_video_device *vd =
314 (struct acpi_video_device *)bl_get_data(bd);
315 acpi_video_device_lcd_set_level(vd,
316 vd->brightness->levels[request_level]);
320 static struct backlight_ops acpi_backlight_ops = {
321 .get_brightness = acpi_video_get_brightness,
322 .update_status = acpi_video_set_brightness,
325 /*video output device sysfs support*/
326 static int acpi_video_output_get(struct output_device *od)
329 struct acpi_video_device *vd =
330 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
331 acpi_video_device_get_state(vd, &state);
335 static int acpi_video_output_set(struct output_device *od)
337 unsigned long state = od->request_state;
338 struct acpi_video_device *vd=
339 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
340 return acpi_video_device_set_state(vd, state);
343 static struct output_properties acpi_output_properties = {
344 .set_state = acpi_video_output_set,
345 .get_status = acpi_video_output_get,
349 /* thermal cooling device callbacks */
350 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
352 struct acpi_device *device = cdev->devdata;
353 struct acpi_video_device *video = acpi_driver_data(device);
355 return sprintf(buf, "%d\n", video->brightness->count - 3);
358 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
360 struct acpi_device *device = cdev->devdata;
361 struct acpi_video_device *video = acpi_driver_data(device);
365 acpi_video_device_lcd_get_level_current(video, &level);
366 for (state = 2; state < video->brightness->count; state++)
367 if (level == video->brightness->levels[state])
368 return sprintf(buf, "%d\n",
369 video->brightness->count - state - 1);
375 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
377 struct acpi_device *device = cdev->devdata;
378 struct acpi_video_device *video = acpi_driver_data(device);
381 if ( state >= video->brightness->count - 2)
384 state = video->brightness->count - state;
385 level = video->brightness->levels[state -1];
386 return acpi_video_device_lcd_set_level(video, level);
389 static struct thermal_cooling_device_ops video_cooling_ops = {
390 .get_max_state = video_get_max_state,
391 .get_cur_state = video_get_cur_state,
392 .set_cur_state = video_set_cur_state,
395 /* --------------------------------------------------------------------------
397 -------------------------------------------------------------------------- */
402 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
406 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
412 acpi_video_device_get_state(struct acpi_video_device *device,
413 unsigned long *state)
417 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
423 acpi_video_device_set_state(struct acpi_video_device *device, int state)
426 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
427 struct acpi_object_list args = { 1, &arg0 };
431 arg0.integer.value = state;
432 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
438 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
439 union acpi_object **levels)
442 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
443 union acpi_object *obj;
448 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
449 if (!ACPI_SUCCESS(status))
451 obj = (union acpi_object *)buffer.pointer;
452 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
453 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
463 kfree(buffer.pointer);
469 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
472 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
473 struct acpi_object_list args = { 1, &arg0 };
476 arg0.integer.value = level;
478 if (device->cap._BCM)
479 status = acpi_evaluate_object(device->dev->handle, "_BCM",
481 device->brightness->curr = level;
486 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
487 unsigned long *level)
489 if (device->cap._BQC)
490 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
492 *level = device->brightness->curr;
497 acpi_video_device_EDID(struct acpi_video_device *device,
498 union acpi_object **edid, ssize_t length)
501 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
502 union acpi_object *obj;
503 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
504 struct acpi_object_list args = { 1, &arg0 };
512 arg0.integer.value = 1;
513 else if (length == 256)
514 arg0.integer.value = 2;
518 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
519 if (ACPI_FAILURE(status))
522 obj = buffer.pointer;
524 if (obj && obj->type == ACPI_TYPE_BUFFER)
527 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
538 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
542 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
543 struct acpi_object_list args = { 1, &arg0 };
546 arg0.integer.value = option;
548 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
549 if (ACPI_SUCCESS(status))
550 status = tmp ? (-EINVAL) : (AE_OK);
556 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
560 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
566 acpi_video_bus_POST_options(struct acpi_video_bus *video,
567 unsigned long *options)
571 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
579 * video : video bus device pointer
581 * 0. The system BIOS should NOT automatically switch(toggle)
582 * the active display output.
583 * 1. The system BIOS should automatically switch (toggle) the
584 * active display output. No switch event.
585 * 2. The _DGS value should be locked.
586 * 3. The system BIOS should not automatically switch (toggle) the
587 * active display output, but instead generate the display switch
590 * 0. The system BIOS should automatically control the brightness level
591 * of the LCD when the power changes from AC to DC
592 * 1. The system BIOS should NOT automatically control the brightness
593 * level of the LCD when the power changes from AC to DC.
599 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
601 acpi_integer status = 0;
602 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
603 struct acpi_object_list args = { 1, &arg0 };
606 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
610 arg0.integer.value = (lcd_flag << 2) | bios_flag;
611 video->dos_setting = arg0.integer.value;
612 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
620 * device : video output device (LCD, CRT, ..)
625 * Find out all required AML methods defined under the output
629 static void acpi_video_device_find_cap(struct acpi_video_device *device)
631 acpi_handle h_dummy1;
634 union acpi_object *obj = NULL;
635 struct acpi_video_device_brightness *br = NULL;
638 memset(&device->cap, 0, sizeof(device->cap));
640 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
641 device->cap._ADR = 1;
643 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
644 device->cap._BCL = 1;
646 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
647 device->cap._BCM = 1;
649 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
650 device->cap._BQC = 1;
651 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
652 device->cap._DDC = 1;
654 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
655 device->cap._DCS = 1;
657 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
658 device->cap._DGS = 1;
660 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
661 device->cap._DSS = 1;
664 if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
666 if (obj->package.count >= 2) {
668 union acpi_object *o;
670 br = kzalloc(sizeof(*br), GFP_KERNEL);
672 printk(KERN_ERR "can't allocate memory\n");
674 br->levels = kmalloc(obj->package.count *
675 sizeof *(br->levels), GFP_KERNEL);
679 for (i = 0; i < obj->package.count; i++) {
680 o = (union acpi_object *)&obj->package.
682 if (o->type != ACPI_TYPE_INTEGER) {
683 printk(KERN_ERR PREFIX "Invalid data\n");
686 br->levels[count] = (u32) o->integer.value;
688 if (br->levels[count] > max_level)
689 max_level = br->levels[count];
698 device->brightness = br;
699 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
700 "found %d brightness levels\n",
707 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
712 if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
714 static int count = 0;
716 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
720 sprintf(name, "acpi_video%d", count++);
721 device->backlight = backlight_device_register(name,
722 NULL, device, &acpi_backlight_ops);
723 device->backlight->props.max_brightness = device->brightness->count-3;
724 device->backlight->props.brightness = acpi_video_get_brightness(device->backlight);
725 backlight_update_status(device->backlight);
728 device->cdev = thermal_cooling_device_register("LCD",
729 device->dev, &video_cooling_ops);
731 printk(KERN_INFO PREFIX
732 "%s is registered as cooling_device%d\n",
733 device->dev->dev.bus_id, device->cdev->id);
734 result = sysfs_create_link(&device->dev->dev.kobj,
735 &device->cdev->device.kobj,
738 printk(KERN_ERR PREFIX "Create sysfs link\n");
739 result = sysfs_create_link(&device->cdev->device.kobj,
740 &device->dev->dev.kobj,
743 printk(KERN_ERR PREFIX "Create sysfs link\n");
746 if (device->cap._DCS && device->cap._DSS){
747 static int count = 0;
749 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
752 sprintf(name, "acpi_video%d", count++);
753 device->output_dev = video_output_register(name,
754 NULL, device, &acpi_output_properties);
762 * device : video output device (VGA)
767 * Find out all required AML methods defined under the video bus device.
770 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
772 acpi_handle h_dummy1;
774 memset(&video->cap, 0, sizeof(video->cap));
775 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
778 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
781 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
784 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
787 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
790 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
796 * Check whether the video bus device has required AML method to
797 * support the desired features
800 static int acpi_video_bus_check(struct acpi_video_bus *video)
802 acpi_status status = -ENOENT;
808 /* Since there is no HID, CID and so on for VGA driver, we have
809 * to check well known required nodes.
812 /* Does this device support video switching? */
813 if (video->cap._DOS) {
814 video->flags.multihead = 1;
818 /* Does this device support retrieving a video ROM? */
819 if (video->cap._ROM) {
820 video->flags.rom = 1;
824 /* Does this device support configuring which video device to POST? */
825 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
826 video->flags.post = 1;
833 /* --------------------------------------------------------------------------
835 -------------------------------------------------------------------------- */
837 static struct proc_dir_entry *acpi_video_dir;
841 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
843 struct acpi_video_device *dev = seq->private;
849 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
850 seq_printf(seq, "type: ");
852 seq_printf(seq, "CRT\n");
853 else if (dev->flags.lcd)
854 seq_printf(seq, "LCD\n");
855 else if (dev->flags.tvout)
856 seq_printf(seq, "TVOUT\n");
857 else if (dev->flags.dvi)
858 seq_printf(seq, "DVI\n");
860 seq_printf(seq, "UNKNOWN\n");
862 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
869 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
871 return single_open(file, acpi_video_device_info_seq_show,
875 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
878 struct acpi_video_device *dev = seq->private;
885 status = acpi_video_device_get_state(dev, &state);
886 seq_printf(seq, "state: ");
887 if (ACPI_SUCCESS(status))
888 seq_printf(seq, "0x%02lx\n", state);
890 seq_printf(seq, "<not supported>\n");
892 status = acpi_video_device_query(dev, &state);
893 seq_printf(seq, "query: ");
894 if (ACPI_SUCCESS(status))
895 seq_printf(seq, "0x%02lx\n", state);
897 seq_printf(seq, "<not supported>\n");
904 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
906 return single_open(file, acpi_video_device_state_seq_show,
911 acpi_video_device_write_state(struct file *file,
912 const char __user * buffer,
913 size_t count, loff_t * data)
916 struct seq_file *m = file->private_data;
917 struct acpi_video_device *dev = m->private;
918 char str[12] = { 0 };
922 if (!dev || count + 1 > sizeof str)
925 if (copy_from_user(str, buffer, count))
929 state = simple_strtoul(str, NULL, 0);
930 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
932 status = acpi_video_device_set_state(dev, state);
941 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
943 struct acpi_video_device *dev = seq->private;
947 if (!dev || !dev->brightness) {
948 seq_printf(seq, "<not supported>\n");
952 seq_printf(seq, "levels: ");
953 for (i = 0; i < dev->brightness->count; i++)
954 seq_printf(seq, " %d", dev->brightness->levels[i]);
955 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
961 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
963 return single_open(file, acpi_video_device_brightness_seq_show,
968 acpi_video_device_write_brightness(struct file *file,
969 const char __user * buffer,
970 size_t count, loff_t * data)
972 struct seq_file *m = file->private_data;
973 struct acpi_video_device *dev = m->private;
975 unsigned int level = 0;
979 if (!dev || !dev->brightness || count + 1 > sizeof str)
982 if (copy_from_user(str, buffer, count))
986 level = simple_strtoul(str, NULL, 0);
991 /* validate through the list of available levels */
992 for (i = 0; i < dev->brightness->count; i++)
993 if (level == dev->brightness->levels[i]) {
995 (acpi_video_device_lcd_set_level(dev, level)))
996 dev->brightness->curr = level;
1003 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1005 struct acpi_video_device *dev = seq->private;
1008 union acpi_object *edid = NULL;
1014 status = acpi_video_device_EDID(dev, &edid, 128);
1015 if (ACPI_FAILURE(status)) {
1016 status = acpi_video_device_EDID(dev, &edid, 256);
1019 if (ACPI_FAILURE(status)) {
1023 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1024 for (i = 0; i < edid->buffer.length; i++)
1025 seq_putc(seq, edid->buffer.pointer[i]);
1030 seq_printf(seq, "<not supported>\n");
1038 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1040 return single_open(file, acpi_video_device_EDID_seq_show,
1044 static int acpi_video_device_add_fs(struct acpi_device *device)
1046 struct proc_dir_entry *entry = NULL;
1047 struct acpi_video_device *vid_dev;
1053 vid_dev = acpi_driver_data(device);
1057 if (!acpi_device_dir(device)) {
1058 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1059 vid_dev->video->dir);
1060 if (!acpi_device_dir(device))
1062 acpi_device_dir(device)->owner = THIS_MODULE;
1066 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1070 entry->proc_fops = &acpi_video_device_info_fops;
1071 entry->data = acpi_driver_data(device);
1072 entry->owner = THIS_MODULE;
1077 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
1078 acpi_device_dir(device));
1082 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1083 entry->proc_fops = &acpi_video_device_state_fops;
1084 entry->data = acpi_driver_data(device);
1085 entry->owner = THIS_MODULE;
1088 /* 'brightness' [R/W] */
1090 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1091 acpi_device_dir(device));
1095 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
1096 entry->proc_fops = &acpi_video_device_brightness_fops;
1097 entry->data = acpi_driver_data(device);
1098 entry->owner = THIS_MODULE;
1102 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
1106 entry->proc_fops = &acpi_video_device_EDID_fops;
1107 entry->data = acpi_driver_data(device);
1108 entry->owner = THIS_MODULE;
1114 static int acpi_video_device_remove_fs(struct acpi_device *device)
1116 struct acpi_video_device *vid_dev;
1118 vid_dev = acpi_driver_data(device);
1119 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1122 if (acpi_device_dir(device)) {
1123 remove_proc_entry("info", acpi_device_dir(device));
1124 remove_proc_entry("state", acpi_device_dir(device));
1125 remove_proc_entry("brightness", acpi_device_dir(device));
1126 remove_proc_entry("EDID", acpi_device_dir(device));
1127 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1128 acpi_device_dir(device) = NULL;
1135 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1137 struct acpi_video_bus *video = seq->private;
1143 seq_printf(seq, "Switching heads: %s\n",
1144 video->flags.multihead ? "yes" : "no");
1145 seq_printf(seq, "Video ROM: %s\n",
1146 video->flags.rom ? "yes" : "no");
1147 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1148 video->flags.post ? "yes" : "no");
1154 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1156 return single_open(file, acpi_video_bus_info_seq_show,
1160 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1162 struct acpi_video_bus *video = seq->private;
1168 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1169 seq_printf(seq, "<TODO>\n");
1175 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1177 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1180 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1182 struct acpi_video_bus *video = seq->private;
1183 unsigned long options;
1190 status = acpi_video_bus_POST_options(video, &options);
1191 if (ACPI_SUCCESS(status)) {
1192 if (!(options & 1)) {
1193 printk(KERN_WARNING PREFIX
1194 "The motherboard VGA device is not listed as a possible POST device.\n");
1195 printk(KERN_WARNING PREFIX
1196 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1198 printk("%lx\n", options);
1199 seq_printf(seq, "can POST: <integrated video>");
1201 seq_printf(seq, " <PCI video>");
1203 seq_printf(seq, " <AGP video>");
1204 seq_putc(seq, '\n');
1206 seq_printf(seq, "<not supported>\n");
1212 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1214 return single_open(file, acpi_video_bus_POST_info_seq_show,
1218 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1220 struct acpi_video_bus *video = seq->private;
1228 status = acpi_video_bus_get_POST(video, &id);
1229 if (!ACPI_SUCCESS(status)) {
1230 seq_printf(seq, "<not supported>\n");
1233 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1239 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1241 struct acpi_video_bus *video = seq->private;
1244 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1249 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1251 return single_open(file, acpi_video_bus_POST_seq_show,
1255 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1257 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1261 acpi_video_bus_write_POST(struct file *file,
1262 const char __user * buffer,
1263 size_t count, loff_t * data)
1266 struct seq_file *m = file->private_data;
1267 struct acpi_video_bus *video = m->private;
1268 char str[12] = { 0 };
1269 unsigned long opt, options;
1272 if (!video || count + 1 > sizeof str)
1275 status = acpi_video_bus_POST_options(video, &options);
1276 if (!ACPI_SUCCESS(status))
1279 if (copy_from_user(str, buffer, count))
1283 opt = strtoul(str, NULL, 0);
1287 /* just in case an OEM 'forgot' the motherboard... */
1290 if (options & (1ul << opt)) {
1291 status = acpi_video_bus_set_POST(video, opt);
1292 if (!ACPI_SUCCESS(status))
1301 acpi_video_bus_write_DOS(struct file *file,
1302 const char __user * buffer,
1303 size_t count, loff_t * data)
1306 struct seq_file *m = file->private_data;
1307 struct acpi_video_bus *video = m->private;
1308 char str[12] = { 0 };
1312 if (!video || count + 1 > sizeof str)
1315 if (copy_from_user(str, buffer, count))
1319 opt = strtoul(str, NULL, 0);
1323 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1325 if (!ACPI_SUCCESS(status))
1331 static int acpi_video_bus_add_fs(struct acpi_device *device)
1335 struct proc_dir_entry *entry = NULL;
1336 struct acpi_video_bus *video;
1340 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1342 if (!ACPI_SUCCESS(status))
1345 /* We need to attempt to determine whether the _ADR refers to a
1346 PCI device or not. There's no terribly good way to do this,
1347 so the best we can hope for is to assume that there'll never
1348 be a video device in the host bridge */
1349 if (device_id >= 0x10000) {
1350 /* It looks like a PCI device. Does it exist? */
1351 dev = acpi_get_physical_device(device->handle);
1353 /* It doesn't look like a PCI device. Does its parent
1355 acpi_handle phandle;
1356 if (acpi_get_parent(device->handle, &phandle))
1358 dev = acpi_get_physical_device(phandle);
1366 video = acpi_driver_data(device);
1368 if (!acpi_device_dir(device)) {
1369 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1371 if (!acpi_device_dir(device))
1373 video->dir = acpi_device_dir(device);
1374 acpi_device_dir(device)->owner = THIS_MODULE;
1378 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1382 entry->proc_fops = &acpi_video_bus_info_fops;
1383 entry->data = acpi_driver_data(device);
1384 entry->owner = THIS_MODULE;
1388 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1392 entry->proc_fops = &acpi_video_bus_ROM_fops;
1393 entry->data = acpi_driver_data(device);
1394 entry->owner = THIS_MODULE;
1397 /* 'POST_info' [R] */
1399 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1403 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1404 entry->data = acpi_driver_data(device);
1405 entry->owner = THIS_MODULE;
1410 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1411 acpi_device_dir(device));
1415 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1416 entry->proc_fops = &acpi_video_bus_POST_fops;
1417 entry->data = acpi_driver_data(device);
1418 entry->owner = THIS_MODULE;
1423 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1424 acpi_device_dir(device));
1428 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1429 entry->proc_fops = &acpi_video_bus_DOS_fops;
1430 entry->data = acpi_driver_data(device);
1431 entry->owner = THIS_MODULE;
1437 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1439 struct acpi_video_bus *video;
1442 video = acpi_driver_data(device);
1444 if (acpi_device_dir(device)) {
1445 remove_proc_entry("info", acpi_device_dir(device));
1446 remove_proc_entry("ROM", acpi_device_dir(device));
1447 remove_proc_entry("POST_info", acpi_device_dir(device));
1448 remove_proc_entry("POST", acpi_device_dir(device));
1449 remove_proc_entry("DOS", acpi_device_dir(device));
1450 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1451 acpi_device_dir(device) = NULL;
1457 /* --------------------------------------------------------------------------
1459 -------------------------------------------------------------------------- */
1461 /* device interface */
1462 static struct acpi_video_device_attrib*
1463 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1467 for(count = 0; count < video->attached_count; count++)
1468 if((video->attached_array[count].value.int_val & 0xffff) == device_id)
1469 return &(video->attached_array[count].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)
1598 #define IDS_VAL(i) video->attached_array[i].value.int_val
1599 #define IDS_BIND(i) video->attached_array[i].bind_info
1601 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1602 i < video->attached_count; i++) {
1603 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1604 IDS_BIND(i) = device;
1605 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1614 * video : video bus device
1619 * Call _DOD to enumerate all devices attached to display adapter
1623 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1628 struct acpi_video_enumerated_device *active_device_list;
1629 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1630 union acpi_object *dod = NULL;
1631 union acpi_object *obj;
1633 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1634 if (!ACPI_SUCCESS(status)) {
1635 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1639 dod = buffer.pointer;
1640 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1641 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1646 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1647 dod->package.count));
1649 active_device_list = kmalloc((1 +
1650 dod->package.count) *
1652 acpi_video_enumerated_device),
1655 if (!active_device_list) {
1661 for (i = 0; i < dod->package.count; i++) {
1662 obj = &dod->package.elements[i];
1664 if (obj->type != ACPI_TYPE_INTEGER) {
1665 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1666 active_device_list[i].value.int_val =
1667 ACPI_VIDEO_HEAD_INVALID;
1669 active_device_list[i].value.int_val = obj->integer.value;
1670 active_device_list[i].bind_info = NULL;
1671 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1672 (int)obj->integer.value));
1675 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1677 kfree(video->attached_array);
1679 video->attached_array = active_device_list;
1680 video->attached_count = count;
1682 kfree(buffer.pointer);
1688 * video : video bus device
1689 * event : notify event
1694 * 1. Find out the current active output device.
1695 * 2. Identify the next output device to switch to.
1696 * 3. call _DSS to do actual switch.
1699 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1701 struct list_head *node;
1702 struct acpi_video_device *dev = NULL;
1703 struct acpi_video_device *dev_next = NULL;
1704 struct acpi_video_device *dev_prev = NULL;
1705 unsigned long state;
1708 mutex_lock(&video->device_list_lock);
1710 list_for_each(node, &video->video_device_list) {
1711 dev = container_of(node, struct acpi_video_device, entry);
1712 status = acpi_video_device_get_state(dev, &state);
1714 dev_next = container_of(node->next,
1715 struct acpi_video_device, entry);
1716 dev_prev = container_of(node->prev,
1717 struct acpi_video_device, entry);
1722 dev_next = container_of(node->next, struct acpi_video_device, entry);
1723 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1726 mutex_unlock(&video->device_list_lock);
1729 case ACPI_VIDEO_NOTIFY_CYCLE:
1730 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1731 acpi_video_device_set_state(dev, 0);
1732 acpi_video_device_set_state(dev_next, 0x80000001);
1734 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1735 acpi_video_device_set_state(dev, 0);
1736 acpi_video_device_set_state(dev_prev, 0x80000001);
1745 acpi_video_get_next_level(struct acpi_video_device *device,
1746 u32 level_current, u32 event)
1748 int min, max, min_above, max_below, i, l, delta = 255;
1749 max = max_below = 0;
1750 min = min_above = 255;
1751 /* Find closest level to level_current */
1752 for (i = 0; i < device->brightness->count; i++) {
1753 l = device->brightness->levels[i];
1754 if (abs(l - level_current) < abs(delta)) {
1755 delta = l - level_current;
1760 /* Ajust level_current to closest available level */
1761 level_current += delta;
1762 for (i = 0; i < device->brightness->count; i++) {
1763 l = device->brightness->levels[i];
1768 if (l < min_above && l > level_current)
1770 if (l > max_below && l < level_current)
1775 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1776 return (level_current < max) ? min_above : min;
1777 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1778 return (level_current < max) ? min_above : max;
1779 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1780 return (level_current > min) ? max_below : min;
1781 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1782 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1785 return level_current;
1790 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1792 unsigned long level_current, level_next;
1793 acpi_video_device_lcd_get_level_current(device, &level_current);
1794 level_next = acpi_video_get_next_level(device, level_current, event);
1795 acpi_video_device_lcd_set_level(device, level_next);
1799 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1800 struct acpi_device *device)
1803 struct acpi_device *dev;
1805 acpi_video_device_enumerate(video);
1807 list_for_each_entry(dev, &device->children, node) {
1809 status = acpi_video_bus_get_one_device(dev, video);
1810 if (ACPI_FAILURE(status)) {
1811 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1818 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1821 struct acpi_video_bus *video;
1824 if (!device || !device->video)
1827 video = device->video;
1829 acpi_video_device_remove_fs(device->dev);
1831 status = acpi_remove_notify_handler(device->dev->handle,
1833 acpi_video_device_notify);
1834 backlight_device_unregister(device->backlight);
1836 sysfs_remove_link(&device->dev->dev.kobj,
1838 sysfs_remove_link(&device->cdev->device.kobj,
1840 thermal_cooling_device_unregister(device->cdev);
1841 device->cdev = NULL;
1843 video_output_unregister(device->output_dev);
1848 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1851 struct acpi_video_device *dev, *next;
1853 mutex_lock(&video->device_list_lock);
1855 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1857 status = acpi_video_bus_put_one_device(dev);
1858 if (ACPI_FAILURE(status))
1859 printk(KERN_WARNING PREFIX
1860 "hhuuhhuu bug in acpi video driver.\n");
1862 if (dev->brightness) {
1863 kfree(dev->brightness->levels);
1864 kfree(dev->brightness);
1866 list_del(&dev->entry);
1870 mutex_unlock(&video->device_list_lock);
1875 /* acpi_video interface */
1877 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1879 return acpi_video_bus_DOS(video, 0, 0);
1882 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1884 return acpi_video_bus_DOS(video, 0, 1);
1887 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1889 struct acpi_video_bus *video = data;
1890 struct acpi_device *device = NULL;
1891 struct input_dev *input;
1897 device = video->device;
1898 input = video->input;
1901 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1902 * most likely via hotkey. */
1903 acpi_bus_generate_proc_event(device, event, 0);
1904 keycode = KEY_SWITCHVIDEOMODE;
1907 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1909 acpi_video_device_enumerate(video);
1910 acpi_video_device_rebind(video);
1911 acpi_video_switch_output(video, event);
1912 acpi_bus_generate_proc_event(device, event, 0);
1913 keycode = KEY_SWITCHVIDEOMODE;
1916 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1917 acpi_video_switch_output(video, event);
1918 acpi_bus_generate_proc_event(device, event, 0);
1919 keycode = KEY_SWITCHVIDEOMODE;
1921 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1922 acpi_video_switch_output(video, event);
1923 acpi_bus_generate_proc_event(device, event, 0);
1924 keycode = KEY_VIDEO_NEXT;
1926 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1927 acpi_video_switch_output(video, event);
1928 acpi_bus_generate_proc_event(device, event, 0);
1929 keycode = KEY_VIDEO_PREV;
1933 keycode = KEY_UNKNOWN;
1934 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1935 "Unsupported event [0x%x]\n", event));
1939 input_report_key(input, keycode, 1);
1941 input_report_key(input, keycode, 0);
1947 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1949 struct acpi_video_device *video_device = data;
1950 struct acpi_device *device = NULL;
1951 struct acpi_video_bus *bus;
1952 struct input_dev *input;
1958 device = video_device->dev;
1959 bus = video_device->video;
1963 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1964 acpi_video_switch_brightness(video_device, event);
1965 acpi_bus_generate_proc_event(device, event, 0);
1966 keycode = KEY_BRIGHTNESS_CYCLE;
1968 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1969 acpi_video_switch_brightness(video_device, event);
1970 acpi_bus_generate_proc_event(device, event, 0);
1971 keycode = KEY_BRIGHTNESSUP;
1973 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1974 acpi_video_switch_brightness(video_device, event);
1975 acpi_bus_generate_proc_event(device, event, 0);
1976 keycode = KEY_BRIGHTNESSDOWN;
1978 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1979 acpi_video_switch_brightness(video_device, event);
1980 acpi_bus_generate_proc_event(device, event, 0);
1981 keycode = KEY_BRIGHTNESS_ZERO;
1983 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1984 acpi_video_switch_brightness(video_device, event);
1985 acpi_bus_generate_proc_event(device, event, 0);
1986 keycode = KEY_DISPLAY_OFF;
1989 keycode = KEY_UNKNOWN;
1990 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1991 "Unsupported event [0x%x]\n", event));
1995 input_report_key(input, keycode, 1);
1997 input_report_key(input, keycode, 0);
2003 static int instance;
2004 static int acpi_video_bus_add(struct acpi_device *device)
2007 struct acpi_video_bus *video;
2008 struct input_dev *input;
2011 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2015 /* a hack to fix the duplicate name "VID" problem on T61 */
2016 if (!strcmp(device->pnp.bus_id, "VID")) {
2018 device->pnp.bus_id[3] = '0' + instance;
2022 video->device = device;
2023 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2024 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2025 acpi_driver_data(device) = video;
2027 acpi_video_bus_find_cap(video);
2028 error = acpi_video_bus_check(video);
2030 goto err_free_video;
2032 error = acpi_video_bus_add_fs(device);
2034 goto err_free_video;
2036 mutex_init(&video->device_list_lock);
2037 INIT_LIST_HEAD(&video->video_device_list);
2039 acpi_video_bus_get_devices(video, device);
2040 acpi_video_bus_start_devices(video);
2042 status = acpi_install_notify_handler(device->handle,
2044 acpi_video_bus_notify, video);
2045 if (ACPI_FAILURE(status)) {
2046 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
2047 "Error installing notify handler\n"));
2049 goto err_stop_video;
2052 video->input = input = input_allocate_device();
2055 goto err_uninstall_notify;
2058 snprintf(video->phys, sizeof(video->phys),
2059 "%s/video/input0", acpi_device_hid(video->device));
2061 input->name = acpi_device_name(video->device);
2062 input->phys = video->phys;
2063 input->id.bustype = BUS_HOST;
2064 input->id.product = 0x06;
2065 input->dev.parent = &device->dev;
2066 input->evbit[0] = BIT(EV_KEY);
2067 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2068 set_bit(KEY_VIDEO_NEXT, input->keybit);
2069 set_bit(KEY_VIDEO_PREV, input->keybit);
2070 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2071 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2072 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2073 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2074 set_bit(KEY_DISPLAY_OFF, input->keybit);
2075 set_bit(KEY_UNKNOWN, input->keybit);
2077 error = input_register_device(input);
2079 goto err_free_input_dev;
2081 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2082 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2083 video->flags.multihead ? "yes" : "no",
2084 video->flags.rom ? "yes" : "no",
2085 video->flags.post ? "yes" : "no");
2090 input_free_device(input);
2091 err_uninstall_notify:
2092 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2093 acpi_video_bus_notify);
2095 acpi_video_bus_stop_devices(video);
2096 acpi_video_bus_put_devices(video);
2097 kfree(video->attached_array);
2098 acpi_video_bus_remove_fs(device);
2101 acpi_driver_data(device) = NULL;
2106 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2108 acpi_status status = 0;
2109 struct acpi_video_bus *video = NULL;
2112 if (!device || !acpi_driver_data(device))
2115 video = acpi_driver_data(device);
2117 acpi_video_bus_stop_devices(video);
2119 status = acpi_remove_notify_handler(video->device->handle,
2121 acpi_video_bus_notify);
2123 acpi_video_bus_put_devices(video);
2124 acpi_video_bus_remove_fs(device);
2126 input_unregister_device(video->input);
2127 kfree(video->attached_array);
2133 static int __init acpi_video_init(void)
2139 acpi_dbg_level = 0xFFFFFFFF;
2140 acpi_dbg_layer = 0x08000000;
2143 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2144 if (!acpi_video_dir)
2146 acpi_video_dir->owner = THIS_MODULE;
2148 result = acpi_bus_register_driver(&acpi_video_bus);
2150 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2157 static void __exit acpi_video_exit(void)
2160 acpi_bus_unregister_driver(&acpi_video_bus);
2162 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2167 module_init(acpi_video_init);
2168 module_exit(acpi_video_exit);