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>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/types.h>
30 #include <linux/list.h>
31 #include <linux/proc_fs.h>
32 #include <linux/seq_file.h>
34 #include <asm/uaccess.h>
36 #include <acpi/acpi_bus.h>
37 #include <acpi/acpi_drivers.h>
39 #define ACPI_VIDEO_COMPONENT 0x08000000
40 #define ACPI_VIDEO_CLASS "video"
41 #define ACPI_VIDEO_DRIVER_NAME "ACPI Video Driver"
42 #define ACPI_VIDEO_BUS_NAME "Video Bus"
43 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
44 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
45 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
46 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
47 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
48 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
50 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x82
51 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x83
52 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x84
53 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x85
54 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x86
56 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
57 #define ACPI_VIDEO_HEAD_END (~0u)
59 #define _COMPONENT ACPI_VIDEO_COMPONENT
60 ACPI_MODULE_NAME("acpi_video")
62 MODULE_AUTHOR("Bruno Ducrot");
63 MODULE_DESCRIPTION(ACPI_VIDEO_DRIVER_NAME);
64 MODULE_LICENSE("GPL");
66 static int acpi_video_bus_add(struct acpi_device *device);
67 static int acpi_video_bus_remove(struct acpi_device *device, int type);
68 static int acpi_video_bus_match(struct acpi_device *device,
69 struct acpi_driver *driver);
71 static struct acpi_driver acpi_video_bus = {
72 .name = ACPI_VIDEO_DRIVER_NAME,
73 .class = ACPI_VIDEO_CLASS,
75 .add = acpi_video_bus_add,
76 .remove = acpi_video_bus_remove,
77 .match = acpi_video_bus_match,
81 struct acpi_video_bus_flags {
82 u8 multihead:1; /* can switch video heads */
83 u8 rom:1; /* can retrieve a video rom */
84 u8 post:1; /* can configure the head to */
88 struct acpi_video_bus_cap {
89 u8 _DOS:1; /*Enable/Disable output switching */
90 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
91 u8 _ROM:1; /*Get ROM Data */
92 u8 _GPD:1; /*Get POST Device */
93 u8 _SPD:1; /*Set POST Device */
94 u8 _VPO:1; /*Video POST Options */
98 struct acpi_video_device_attrib {
99 u32 display_index:4; /* A zero-based instance of the Display */
100 u32 display_port_attachment:4; /*This field differenates displays type */
101 u32 display_type:4; /*Describe the specific type in use */
102 u32 vendor_specific:4; /*Chipset Vendor Specifi */
103 u32 bios_can_detect:1; /*BIOS can detect the device */
104 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
106 u32 pipe_id:3; /*For VGA multiple-head devices. */
107 u32 reserved:10; /*Must be 0 */
108 u32 device_id_scheme:1; /*Device ID Scheme */
111 struct acpi_video_enumerated_device {
114 struct acpi_video_device_attrib attrib;
116 struct acpi_video_device *bind_info;
119 struct acpi_video_bus {
122 struct acpi_video_enumerated_device *attached_array;
124 struct acpi_video_bus_cap cap;
125 struct acpi_video_bus_flags flags;
126 struct semaphore sem;
127 struct list_head video_device_list;
128 struct proc_dir_entry *dir;
131 struct acpi_video_device_flags {
140 struct acpi_video_device_cap {
141 u8 _ADR:1; /*Return the unique ID */
142 u8 _BCL:1; /*Query list of brightness control levels supported */
143 u8 _BCM:1; /*Set the brightness level */
144 u8 _DDC:1; /*Return the EDID for this device */
145 u8 _DCS:1; /*Return status of output device */
146 u8 _DGS:1; /*Query graphics state */
147 u8 _DSS:1; /*Device state set */
151 struct acpi_video_device_brightness {
157 struct acpi_video_device {
159 unsigned long device_id;
160 struct acpi_video_device_flags flags;
161 struct acpi_video_device_cap cap;
162 struct list_head entry;
163 struct acpi_video_bus *video;
164 struct acpi_device *dev;
165 struct acpi_video_device_brightness *brightness;
169 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
170 static struct file_operations acpi_video_bus_info_fops = {
171 .open = acpi_video_bus_info_open_fs,
174 .release = single_release,
177 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
178 static struct file_operations acpi_video_bus_ROM_fops = {
179 .open = acpi_video_bus_ROM_open_fs,
182 .release = single_release,
185 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
187 static struct file_operations acpi_video_bus_POST_info_fops = {
188 .open = acpi_video_bus_POST_info_open_fs,
191 .release = single_release,
194 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
195 static struct file_operations acpi_video_bus_POST_fops = {
196 .open = acpi_video_bus_POST_open_fs,
199 .release = single_release,
202 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
203 static struct file_operations acpi_video_bus_DOS_fops = {
204 .open = acpi_video_bus_DOS_open_fs,
207 .release = single_release,
211 static int acpi_video_device_info_open_fs(struct inode *inode,
213 static struct file_operations acpi_video_device_info_fops = {
214 .open = acpi_video_device_info_open_fs,
217 .release = single_release,
220 static int acpi_video_device_state_open_fs(struct inode *inode,
222 static struct file_operations acpi_video_device_state_fops = {
223 .open = acpi_video_device_state_open_fs,
226 .release = single_release,
229 static int acpi_video_device_brightness_open_fs(struct inode *inode,
231 static struct file_operations acpi_video_device_brightness_fops = {
232 .open = acpi_video_device_brightness_open_fs,
235 .release = single_release,
238 static int acpi_video_device_EDID_open_fs(struct inode *inode,
240 static struct file_operations acpi_video_device_EDID_fops = {
241 .open = acpi_video_device_EDID_open_fs,
244 .release = single_release,
247 static char device_decode[][30] = {
248 "motherboard VGA device",
254 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
255 static void acpi_video_device_rebind(struct acpi_video_bus *video);
256 static void acpi_video_device_bind(struct acpi_video_bus *video,
257 struct acpi_video_device *device);
258 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
259 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
260 static int acpi_video_get_next_level(struct acpi_video_device *device,
261 u32 level_current, u32 event);
262 static void acpi_video_switch_brightness(struct acpi_video_device *device,
265 /* --------------------------------------------------------------------------
267 -------------------------------------------------------------------------- */
272 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
275 ACPI_FUNCTION_TRACE("acpi_video_device_query");
276 status = acpi_evaluate_integer(device->handle, "_DGS", NULL, state);
278 return_VALUE(status);
282 acpi_video_device_get_state(struct acpi_video_device *device,
283 unsigned long *state)
287 ACPI_FUNCTION_TRACE("acpi_video_device_get_state");
289 status = acpi_evaluate_integer(device->handle, "_DCS", NULL, state);
291 return_VALUE(status);
295 acpi_video_device_set_state(struct acpi_video_device *device, int state)
298 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
299 struct acpi_object_list args = { 1, &arg0 };
301 ACPI_FUNCTION_TRACE("acpi_video_device_set_state");
303 arg0.integer.value = state;
304 status = acpi_evaluate_integer(device->handle, "_DSS", &args, NULL);
306 return_VALUE(status);
310 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
311 union acpi_object **levels)
314 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
315 union acpi_object *obj;
317 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_query_levels");
321 status = acpi_evaluate_object(device->handle, "_BCL", NULL, &buffer);
322 if (!ACPI_SUCCESS(status))
323 return_VALUE(status);
324 obj = (union acpi_object *)buffer.pointer;
325 if (!obj && (obj->type != ACPI_TYPE_PACKAGE)) {
326 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _BCL data\n"));
337 kfree(buffer.pointer);
339 return_VALUE(status);
343 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
346 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
347 struct acpi_object_list args = { 1, &arg0 };
349 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_set_level");
351 arg0.integer.value = level;
352 status = acpi_evaluate_object(device->handle, "_BCM", &args, NULL);
354 printk(KERN_DEBUG "set_level status: %x\n", status);
355 return_VALUE(status);
359 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
360 unsigned long *level)
363 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_get_level_current");
365 status = acpi_evaluate_integer(device->handle, "_BQC", NULL, level);
367 return_VALUE(status);
371 acpi_video_device_EDID(struct acpi_video_device *device,
372 union acpi_object **edid, ssize_t length)
375 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
376 union acpi_object *obj;
377 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
378 struct acpi_object_list args = { 1, &arg0 };
380 ACPI_FUNCTION_TRACE("acpi_video_device_get_EDID");
385 return_VALUE(-ENODEV);
387 arg0.integer.value = 1;
388 else if (length == 256)
389 arg0.integer.value = 2;
391 return_VALUE(-EINVAL);
393 status = acpi_evaluate_object(device->handle, "_DDC", &args, &buffer);
394 if (ACPI_FAILURE(status))
395 return_VALUE(-ENODEV);
397 obj = (union acpi_object *)buffer.pointer;
399 if (obj && obj->type == ACPI_TYPE_BUFFER)
402 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DDC data\n"));
407 return_VALUE(status);
413 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
417 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
418 struct acpi_object_list args = { 1, &arg0 };
420 ACPI_FUNCTION_TRACE("acpi_video_bus_set_POST");
422 arg0.integer.value = option;
424 status = acpi_evaluate_integer(video->handle, "_SPD", &args, &tmp);
425 if (ACPI_SUCCESS(status))
426 status = tmp ? (-EINVAL) : (AE_OK);
428 return_VALUE(status);
432 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
436 ACPI_FUNCTION_TRACE("acpi_video_bus_get_POST");
438 status = acpi_evaluate_integer(video->handle, "_GPD", NULL, id);
440 return_VALUE(status);
444 acpi_video_bus_POST_options(struct acpi_video_bus *video,
445 unsigned long *options)
448 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_options");
450 status = acpi_evaluate_integer(video->handle, "_VPO", NULL, options);
453 return_VALUE(status);
458 * video : video bus device pointer
460 * 0. The system BIOS should NOT automatically switch(toggle)
461 * the active display output.
462 * 1. The system BIOS should automatically switch (toggle) the
463 * active display output. No swich event.
464 * 2. The _DGS value should be locked.
465 * 3. The system BIOS should not automatically switch (toggle) the
466 * active display output, but instead generate the display switch
469 * 0. The system BIOS should automatically control the brightness level
470 * of the LCD, when the power changes from AC to DC
471 * 1. The system BIOS should NOT automatically control the brightness
472 * level of the LCD, when the power changes from AC to DC.
478 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
480 acpi_integer status = 0;
481 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
482 struct acpi_object_list args = { 1, &arg0 };
484 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS");
486 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
490 arg0.integer.value = (lcd_flag << 2) | bios_flag;
491 video->dos_setting = arg0.integer.value;
492 acpi_evaluate_object(video->handle, "_DOS", &args, NULL);
495 return_VALUE(status);
500 * device : video output device (LCD, CRT, ..)
505 * Find out all required AML method defined under the output
509 static void acpi_video_device_find_cap(struct acpi_video_device *device)
512 acpi_handle h_dummy1;
514 union acpi_object *obj = NULL;
515 struct acpi_video_device_brightness *br = NULL;
517 ACPI_FUNCTION_TRACE("acpi_video_device_find_cap");
519 memset(&device->cap, 0, 4);
521 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ADR", &h_dummy1))) {
522 device->cap._ADR = 1;
524 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCL", &h_dummy1))) {
525 device->cap._BCL = 1;
527 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCM", &h_dummy1))) {
528 device->cap._BCM = 1;
530 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DDC", &h_dummy1))) {
531 device->cap._DDC = 1;
533 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DCS", &h_dummy1))) {
534 device->cap._DCS = 1;
536 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DGS", &h_dummy1))) {
537 device->cap._DGS = 1;
539 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DSS", &h_dummy1))) {
540 device->cap._DSS = 1;
543 status = acpi_video_device_lcd_query_levels(device, &obj);
545 if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
547 union acpi_object *o;
549 br = kmalloc(sizeof(*br), GFP_KERNEL);
551 printk(KERN_ERR "can't allocate memory\n");
553 memset(br, 0, sizeof(*br));
554 br->levels = kmalloc(obj->package.count *
555 sizeof *(br->levels), GFP_KERNEL);
559 for (i = 0; i < obj->package.count; i++) {
560 o = (union acpi_object *)&obj->package.
562 if (o->type != ACPI_TYPE_INTEGER) {
563 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
567 br->levels[count] = (u32) o->integer.value;
576 device->brightness = br;
577 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
578 "found %d brightness levels\n",
591 * device : video output device (VGA)
596 * Find out all required AML method defined under the video bus device.
599 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
601 acpi_handle h_dummy1;
603 memset(&video->cap, 0, 4);
604 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
607 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
610 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
613 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
616 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
619 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
625 * Check whether the video bus device has required AML method to
626 * support the desired features
629 static int acpi_video_bus_check(struct acpi_video_bus *video)
631 acpi_status status = -ENOENT;
633 ACPI_FUNCTION_TRACE("acpi_video_bus_check");
636 return_VALUE(-EINVAL);
638 /* Since there is no HID, CID and so on for VGA driver, we have
639 * to check well known required nodes.
642 /* Does this device able to support video switching ? */
643 if (video->cap._DOS) {
644 video->flags.multihead = 1;
648 /* Does this device able to retrieve a retrieve a video ROM ? */
649 if (video->cap._ROM) {
650 video->flags.rom = 1;
654 /* Does this device able to configure which video device to POST ? */
655 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
656 video->flags.post = 1;
660 return_VALUE(status);
663 /* --------------------------------------------------------------------------
665 -------------------------------------------------------------------------- */
667 static struct proc_dir_entry *acpi_video_dir;
671 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
673 struct acpi_video_device *dev =
674 (struct acpi_video_device *)seq->private;
676 ACPI_FUNCTION_TRACE("acpi_video_device_info_seq_show");
681 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
682 seq_printf(seq, "type: ");
684 seq_printf(seq, "CRT\n");
685 else if (dev->flags.lcd)
686 seq_printf(seq, "LCD\n");
687 else if (dev->flags.tvout)
688 seq_printf(seq, "TVOUT\n");
690 seq_printf(seq, "UNKNOWN\n");
692 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
699 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
701 return single_open(file, acpi_video_device_info_seq_show,
705 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
708 struct acpi_video_device *dev =
709 (struct acpi_video_device *)seq->private;
712 ACPI_FUNCTION_TRACE("acpi_video_device_state_seq_show");
717 status = acpi_video_device_get_state(dev, &state);
718 seq_printf(seq, "state: ");
719 if (ACPI_SUCCESS(status))
720 seq_printf(seq, "0x%02lx\n", state);
722 seq_printf(seq, "<not supported>\n");
724 status = acpi_video_device_query(dev, &state);
725 seq_printf(seq, "query: ");
726 if (ACPI_SUCCESS(status))
727 seq_printf(seq, "0x%02lx\n", state);
729 seq_printf(seq, "<not supported>\n");
736 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
738 return single_open(file, acpi_video_device_state_seq_show,
743 acpi_video_device_write_state(struct file *file,
744 const char __user * buffer,
745 size_t count, loff_t * data)
748 struct seq_file *m = (struct seq_file *)file->private_data;
749 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
750 char str[12] = { 0 };
753 ACPI_FUNCTION_TRACE("acpi_video_device_write_state");
755 if (!dev || count + 1 > sizeof str)
756 return_VALUE(-EINVAL);
758 if (copy_from_user(str, buffer, count))
759 return_VALUE(-EFAULT);
762 state = simple_strtoul(str, NULL, 0);
763 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
765 status = acpi_video_device_set_state(dev, state);
768 return_VALUE(-EFAULT);
774 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
776 struct acpi_video_device *dev =
777 (struct acpi_video_device *)seq->private;
780 ACPI_FUNCTION_TRACE("acpi_video_device_brightness_seq_show");
782 if (!dev || !dev->brightness) {
783 seq_printf(seq, "<not supported>\n");
787 seq_printf(seq, "levels: ");
788 for (i = 0; i < dev->brightness->count; i++)
789 seq_printf(seq, " %d", dev->brightness->levels[i]);
790 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
796 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
798 return single_open(file, acpi_video_device_brightness_seq_show,
803 acpi_video_device_write_brightness(struct file *file,
804 const char __user * buffer,
805 size_t count, loff_t * data)
807 struct seq_file *m = (struct seq_file *)file->private_data;
808 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
810 unsigned int level = 0;
813 ACPI_FUNCTION_TRACE("acpi_video_device_write_brightness");
815 if (!dev || count + 1 > sizeof str)
816 return_VALUE(-EINVAL);
818 if (copy_from_user(str, buffer, count))
819 return_VALUE(-EFAULT);
822 level = simple_strtoul(str, NULL, 0);
825 return_VALUE(-EFAULT);
827 /* validate though the list of available levels */
828 for (i = 0; i < dev->brightness->count; i++)
829 if (level == dev->brightness->levels[i]) {
831 (acpi_video_device_lcd_set_level(dev, level)))
832 dev->brightness->curr = level;
839 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
841 struct acpi_video_device *dev =
842 (struct acpi_video_device *)seq->private;
845 union acpi_object *edid = NULL;
847 ACPI_FUNCTION_TRACE("acpi_video_device_EDID_seq_show");
852 status = acpi_video_device_EDID(dev, &edid, 128);
853 if (ACPI_FAILURE(status)) {
854 status = acpi_video_device_EDID(dev, &edid, 256);
857 if (ACPI_FAILURE(status)) {
861 if (edid && edid->type == ACPI_TYPE_BUFFER) {
862 for (i = 0; i < edid->buffer.length; i++)
863 seq_putc(seq, edid->buffer.pointer[i]);
868 seq_printf(seq, "<not supported>\n");
876 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
878 return single_open(file, acpi_video_device_EDID_seq_show,
882 static int acpi_video_device_add_fs(struct acpi_device *device)
884 struct proc_dir_entry *entry = NULL;
885 struct acpi_video_device *vid_dev;
887 ACPI_FUNCTION_TRACE("acpi_video_device_add_fs");
890 return_VALUE(-ENODEV);
892 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
894 return_VALUE(-ENODEV);
896 if (!acpi_device_dir(device)) {
897 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
898 vid_dev->video->dir);
899 if (!acpi_device_dir(device))
900 return_VALUE(-ENODEV);
901 acpi_device_dir(device)->owner = THIS_MODULE;
905 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
907 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
908 "Unable to create 'info' fs entry\n"));
910 entry->proc_fops = &acpi_video_device_info_fops;
911 entry->data = acpi_driver_data(device);
912 entry->owner = THIS_MODULE;
917 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
918 acpi_device_dir(device));
920 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
921 "Unable to create 'state' fs entry\n"));
923 entry->proc_fops = &acpi_video_device_state_fops;
924 entry->proc_fops->write = acpi_video_device_write_state;
925 entry->data = acpi_driver_data(device);
926 entry->owner = THIS_MODULE;
929 /* 'brightness' [R/W] */
931 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
932 acpi_device_dir(device));
934 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
935 "Unable to create 'brightness' fs entry\n"));
937 entry->proc_fops = &acpi_video_device_brightness_fops;
938 entry->proc_fops->write = acpi_video_device_write_brightness;
939 entry->data = acpi_driver_data(device);
940 entry->owner = THIS_MODULE;
944 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
946 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
947 "Unable to create 'brightness' fs entry\n"));
949 entry->proc_fops = &acpi_video_device_EDID_fops;
950 entry->data = acpi_driver_data(device);
951 entry->owner = THIS_MODULE;
957 static int acpi_video_device_remove_fs(struct acpi_device *device)
959 struct acpi_video_device *vid_dev;
960 ACPI_FUNCTION_TRACE("acpi_video_device_remove_fs");
962 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
963 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
964 return_VALUE(-ENODEV);
966 if (acpi_device_dir(device)) {
967 remove_proc_entry("info", acpi_device_dir(device));
968 remove_proc_entry("state", acpi_device_dir(device));
969 remove_proc_entry("brightness", acpi_device_dir(device));
970 remove_proc_entry("EDID", acpi_device_dir(device));
971 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
972 acpi_device_dir(device) = NULL;
979 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
981 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
983 ACPI_FUNCTION_TRACE("acpi_video_bus_info_seq_show");
988 seq_printf(seq, "Switching heads: %s\n",
989 video->flags.multihead ? "yes" : "no");
990 seq_printf(seq, "Video ROM: %s\n",
991 video->flags.rom ? "yes" : "no");
992 seq_printf(seq, "Device to be POSTed on boot: %s\n",
993 video->flags.post ? "yes" : "no");
999 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1001 return single_open(file, acpi_video_bus_info_seq_show,
1005 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1007 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1009 ACPI_FUNCTION_TRACE("acpi_video_bus_ROM_seq_show");
1014 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1015 seq_printf(seq, "<TODO>\n");
1021 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1023 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1026 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1028 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1029 unsigned long options;
1032 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_info_seq_show");
1037 status = acpi_video_bus_POST_options(video, &options);
1038 if (ACPI_SUCCESS(status)) {
1039 if (!(options & 1)) {
1040 printk(KERN_WARNING PREFIX
1041 "The motherboard VGA device is not listed as a possible POST device.\n");
1042 printk(KERN_WARNING PREFIX
1043 "This indicate a BIOS bug. Please contact the manufacturer.\n");
1045 printk("%lx\n", options);
1046 seq_printf(seq, "can POST: <intgrated video>");
1048 seq_printf(seq, " <PCI video>");
1050 seq_printf(seq, " <AGP video>");
1051 seq_putc(seq, '\n');
1053 seq_printf(seq, "<not supported>\n");
1059 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1061 return single_open(file, acpi_video_bus_POST_info_seq_show,
1065 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1067 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1071 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_seq_show");
1076 status = acpi_video_bus_get_POST(video, &id);
1077 if (!ACPI_SUCCESS(status)) {
1078 seq_printf(seq, "<not supported>\n");
1081 seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
1087 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1089 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1091 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS_seq_show");
1093 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1098 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1100 return single_open(file, acpi_video_bus_POST_seq_show,
1104 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1106 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1110 acpi_video_bus_write_POST(struct file *file,
1111 const char __user * buffer,
1112 size_t count, loff_t * data)
1115 struct seq_file *m = (struct seq_file *)file->private_data;
1116 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1117 char str[12] = { 0 };
1118 unsigned long opt, options;
1120 ACPI_FUNCTION_TRACE("acpi_video_bus_write_POST");
1122 if (!video || count + 1 > sizeof str)
1123 return_VALUE(-EINVAL);
1125 status = acpi_video_bus_POST_options(video, &options);
1126 if (!ACPI_SUCCESS(status))
1127 return_VALUE(-EINVAL);
1129 if (copy_from_user(str, buffer, count))
1130 return_VALUE(-EFAULT);
1133 opt = strtoul(str, NULL, 0);
1135 return_VALUE(-EFAULT);
1137 /* just in case an OEM 'forget' the motherboard... */
1140 if (options & (1ul << opt)) {
1141 status = acpi_video_bus_set_POST(video, opt);
1142 if (!ACPI_SUCCESS(status))
1143 return_VALUE(-EFAULT);
1147 return_VALUE(count);
1151 acpi_video_bus_write_DOS(struct file *file,
1152 const char __user * buffer,
1153 size_t count, loff_t * data)
1156 struct seq_file *m = (struct seq_file *)file->private_data;
1157 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1158 char str[12] = { 0 };
1161 ACPI_FUNCTION_TRACE("acpi_video_bus_write_DOS");
1163 if (!video || count + 1 > sizeof str)
1164 return_VALUE(-EINVAL);
1166 if (copy_from_user(str, buffer, count))
1167 return_VALUE(-EFAULT);
1170 opt = strtoul(str, NULL, 0);
1172 return_VALUE(-EFAULT);
1174 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1176 if (!ACPI_SUCCESS(status))
1177 return_VALUE(-EFAULT);
1179 return_VALUE(count);
1182 static int acpi_video_bus_add_fs(struct acpi_device *device)
1184 struct proc_dir_entry *entry = NULL;
1185 struct acpi_video_bus *video;
1187 ACPI_FUNCTION_TRACE("acpi_video_bus_add_fs");
1189 video = (struct acpi_video_bus *)acpi_driver_data(device);
1191 if (!acpi_device_dir(device)) {
1192 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1194 if (!acpi_device_dir(device))
1195 return_VALUE(-ENODEV);
1196 video->dir = acpi_device_dir(device);
1197 acpi_device_dir(device)->owner = THIS_MODULE;
1201 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1203 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1204 "Unable to create 'info' fs entry\n"));
1206 entry->proc_fops = &acpi_video_bus_info_fops;
1207 entry->data = acpi_driver_data(device);
1208 entry->owner = THIS_MODULE;
1212 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1214 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1215 "Unable to create 'ROM' fs entry\n"));
1217 entry->proc_fops = &acpi_video_bus_ROM_fops;
1218 entry->data = acpi_driver_data(device);
1219 entry->owner = THIS_MODULE;
1222 /* 'POST_info' [R] */
1224 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1226 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1227 "Unable to create 'POST_info' fs entry\n"));
1229 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1230 entry->data = acpi_driver_data(device);
1231 entry->owner = THIS_MODULE;
1236 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1237 acpi_device_dir(device));
1239 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1240 "Unable to create 'POST' fs entry\n"));
1242 entry->proc_fops = &acpi_video_bus_POST_fops;
1243 entry->proc_fops->write = acpi_video_bus_write_POST;
1244 entry->data = acpi_driver_data(device);
1245 entry->owner = THIS_MODULE;
1250 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1251 acpi_device_dir(device));
1253 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1254 "Unable to create 'DOS' fs entry\n"));
1256 entry->proc_fops = &acpi_video_bus_DOS_fops;
1257 entry->proc_fops->write = acpi_video_bus_write_DOS;
1258 entry->data = acpi_driver_data(device);
1259 entry->owner = THIS_MODULE;
1265 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1267 struct acpi_video_bus *video;
1269 ACPI_FUNCTION_TRACE("acpi_video_bus_remove_fs");
1271 video = (struct acpi_video_bus *)acpi_driver_data(device);
1273 if (acpi_device_dir(device)) {
1274 remove_proc_entry("info", acpi_device_dir(device));
1275 remove_proc_entry("ROM", acpi_device_dir(device));
1276 remove_proc_entry("POST_info", acpi_device_dir(device));
1277 remove_proc_entry("POST", acpi_device_dir(device));
1278 remove_proc_entry("DOS", acpi_device_dir(device));
1279 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1280 acpi_device_dir(device) = NULL;
1286 /* --------------------------------------------------------------------------
1288 -------------------------------------------------------------------------- */
1290 /* device interface */
1293 acpi_video_bus_get_one_device(struct acpi_device *device,
1294 struct acpi_video_bus *video)
1296 unsigned long device_id;
1298 struct acpi_video_device *data;
1300 ACPI_FUNCTION_TRACE("acpi_video_bus_get_one_device");
1302 if (!device || !video)
1303 return_VALUE(-EINVAL);
1306 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1307 if (ACPI_SUCCESS(status)) {
1309 data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1311 return_VALUE(-ENOMEM);
1313 memset(data, 0, sizeof(struct acpi_video_device));
1315 data->handle = device->handle;
1316 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1317 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1318 acpi_driver_data(device) = data;
1320 data->device_id = device_id;
1321 data->video = video;
1324 switch (device_id & 0xffff) {
1326 data->flags.crt = 1;
1329 data->flags.lcd = 1;
1332 data->flags.tvout = 1;
1335 data->flags.unknown = 1;
1339 acpi_video_device_bind(video, data);
1340 acpi_video_device_find_cap(data);
1342 status = acpi_install_notify_handler(data->handle,
1344 acpi_video_device_notify,
1346 if (ACPI_FAILURE(status)) {
1347 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1348 "Error installing notify handler\n"));
1354 list_add_tail(&data->entry, &video->video_device_list);
1357 acpi_video_device_add_fs(device);
1363 return_VALUE(-ENOENT);
1368 * video : video bus device
1373 * Enumerate the video device list of the video bus,
1374 * bind the ids with the corresponding video devices
1375 * under the video bus.
1378 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1380 struct list_head *node, *next;
1381 list_for_each_safe(node, next, &video->video_device_list) {
1382 struct acpi_video_device *dev =
1383 container_of(node, struct acpi_video_device, entry);
1384 acpi_video_device_bind(video, dev);
1390 * video : video bus device
1391 * device : video output device under the video
1397 * Bind the ids with the corresponding video devices
1398 * under the video bus.
1402 acpi_video_device_bind(struct acpi_video_bus *video,
1403 struct acpi_video_device *device)
1406 ACPI_FUNCTION_TRACE("acpi_video_device_bind");
1408 #define IDS_VAL(i) video->attached_array[i].value.int_val
1409 #define IDS_BIND(i) video->attached_array[i].bind_info
1411 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1412 i < video->attached_count; i++) {
1413 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1414 IDS_BIND(i) = device;
1415 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1424 * video : video bus device
1429 * Call _DOD to enumerate all devices attached to display adapter
1433 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1438 struct acpi_video_enumerated_device *active_device_list;
1439 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1440 union acpi_object *dod = NULL;
1441 union acpi_object *obj;
1443 ACPI_FUNCTION_TRACE("acpi_video_device_enumerate");
1445 status = acpi_evaluate_object(video->handle, "_DOD", NULL, &buffer);
1446 if (!ACPI_SUCCESS(status)) {
1447 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _DOD\n"));
1448 return_VALUE(status);
1451 dod = (union acpi_object *)buffer.pointer;
1452 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1453 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DOD data\n"));
1458 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1459 dod->package.count));
1461 active_device_list = kmalloc((1 +
1462 dod->package.count) *
1464 acpi_video_enumerated_device),
1467 if (!active_device_list) {
1473 for (i = 0; i < dod->package.count; i++) {
1474 obj = (union acpi_object *)&dod->package.elements[i];
1476 if (obj->type != ACPI_TYPE_INTEGER) {
1477 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1478 "Invalid _DOD data\n"));
1479 active_device_list[i].value.int_val =
1480 ACPI_VIDEO_HEAD_INVALID;
1482 active_device_list[i].value.int_val = obj->integer.value;
1483 active_device_list[i].bind_info = NULL;
1484 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1485 (int)obj->integer.value));
1488 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1490 if (video->attached_array)
1491 kfree(video->attached_array);
1493 video->attached_array = active_device_list;
1494 video->attached_count = count;
1496 acpi_os_free(buffer.pointer);
1497 return_VALUE(status);
1502 * video : video bus device
1503 * event : Nontify Event
1508 * 1. Find out the current active output device.
1509 * 2. Identify the next output device to switch
1510 * 3. call _DSS to do actual switch.
1513 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1515 struct list_head *node, *next;
1516 struct acpi_video_device *dev = NULL;
1517 struct acpi_video_device *dev_next = NULL;
1518 struct acpi_video_device *dev_prev = NULL;
1519 unsigned long state;
1522 ACPI_FUNCTION_TRACE("acpi_video_switch_output");
1524 list_for_each_safe(node, next, &video->video_device_list) {
1525 dev = container_of(node, struct acpi_video_device, entry);
1526 status = acpi_video_device_get_state(dev, &state);
1529 container_of(node->next, struct acpi_video_device,
1532 container_of(node->prev, struct acpi_video_device,
1537 dev_next = container_of(node->next, struct acpi_video_device, entry);
1538 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1541 case ACPI_VIDEO_NOTIFY_CYCLE:
1542 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1543 acpi_video_device_set_state(dev, 0);
1544 acpi_video_device_set_state(dev_next, 0x80000001);
1546 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1547 acpi_video_device_set_state(dev, 0);
1548 acpi_video_device_set_state(dev_prev, 0x80000001);
1553 return_VALUE(status);
1557 acpi_video_get_next_level(struct acpi_video_device *device,
1558 u32 level_current, u32 event)
1561 return level_current;
1565 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1567 unsigned long level_current, level_next;
1568 acpi_video_device_lcd_get_level_current(device, &level_current);
1569 level_next = acpi_video_get_next_level(device, level_current, event);
1570 acpi_video_device_lcd_set_level(device, level_next);
1574 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1575 struct acpi_device *device)
1578 struct list_head *node, *next;
1580 ACPI_FUNCTION_TRACE("acpi_video_get_devices");
1582 acpi_video_device_enumerate(video);
1584 list_for_each_safe(node, next, &device->children) {
1585 struct acpi_device *dev =
1586 list_entry(node, struct acpi_device, node);
1591 status = acpi_video_bus_get_one_device(dev, video);
1592 if (ACPI_FAILURE(status)) {
1593 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1594 "Cant attach device\n"));
1599 return_VALUE(status);
1602 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1605 struct acpi_video_bus *video;
1607 ACPI_FUNCTION_TRACE("acpi_video_bus_put_one_device");
1609 if (!device || !device->video)
1610 return_VALUE(-ENOENT);
1612 video = device->video;
1615 list_del(&device->entry);
1617 acpi_video_device_remove_fs(device->dev);
1619 status = acpi_remove_notify_handler(device->handle,
1621 acpi_video_device_notify);
1622 if (ACPI_FAILURE(status))
1623 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1624 "Error removing notify handler\n"));
1629 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1632 struct list_head *node, *next;
1634 ACPI_FUNCTION_TRACE("acpi_video_bus_put_devices");
1636 list_for_each_safe(node, next, &video->video_device_list) {
1637 struct acpi_video_device *data =
1638 list_entry(node, struct acpi_video_device, entry);
1642 status = acpi_video_bus_put_one_device(data);
1643 if (ACPI_FAILURE(status))
1644 printk(KERN_WARNING PREFIX
1645 "hhuuhhuu bug in acpi video driver.\n");
1647 if (data->brightness)
1648 kfree(data->brightness);
1656 /* acpi_video interface */
1658 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1660 return acpi_video_bus_DOS(video, 1, 0);
1663 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1665 return acpi_video_bus_DOS(video, 0, 1);
1668 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1670 struct acpi_video_bus *video = (struct acpi_video_bus *)data;
1671 struct acpi_device *device = NULL;
1673 ACPI_FUNCTION_TRACE("acpi_video_bus_notify");
1674 printk("video bus notify\n");
1679 if (acpi_bus_get_device(handle, &device))
1683 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1684 * most likely via hotkey. */
1685 acpi_bus_generate_event(device, event, 0);
1688 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1690 acpi_video_device_enumerate(video);
1691 acpi_video_device_rebind(video);
1692 acpi_video_switch_output(video, event);
1693 acpi_bus_generate_event(device, event, 0);
1696 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1697 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1698 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1699 acpi_video_switch_output(video, event);
1700 acpi_bus_generate_event(device, event, 0);
1704 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1705 "Unsupported event [0x%x]\n", event));
1712 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1714 struct acpi_video_device *video_device =
1715 (struct acpi_video_device *)data;
1716 struct acpi_device *device = NULL;
1718 ACPI_FUNCTION_TRACE("acpi_video_device_notify");
1720 printk("video device notify\n");
1724 if (acpi_bus_get_device(handle, &device))
1728 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1729 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1730 acpi_bus_generate_event(device, event, 0);
1732 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1733 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1734 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1735 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1736 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1737 acpi_video_switch_brightness(video_device, event);
1738 acpi_bus_generate_event(device, event, 0);
1741 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1742 "Unsupported event [0x%x]\n", event));
1748 static int acpi_video_bus_add(struct acpi_device *device)
1751 acpi_status status = 0;
1752 struct acpi_video_bus *video = NULL;
1754 ACPI_FUNCTION_TRACE("acpi_video_bus_add");
1757 return_VALUE(-EINVAL);
1759 video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1761 return_VALUE(-ENOMEM);
1762 memset(video, 0, sizeof(struct acpi_video_bus));
1764 video->handle = device->handle;
1765 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1766 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1767 acpi_driver_data(device) = video;
1769 acpi_video_bus_find_cap(video);
1770 result = acpi_video_bus_check(video);
1774 result = acpi_video_bus_add_fs(device);
1778 init_MUTEX(&video->sem);
1779 INIT_LIST_HEAD(&video->video_device_list);
1781 acpi_video_bus_get_devices(video, device);
1782 acpi_video_bus_start_devices(video);
1784 status = acpi_install_notify_handler(video->handle,
1786 acpi_video_bus_notify, video);
1787 if (ACPI_FAILURE(status)) {
1788 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1789 "Error installing notify handler\n"));
1794 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1795 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1796 video->flags.multihead ? "yes" : "no",
1797 video->flags.rom ? "yes" : "no",
1798 video->flags.post ? "yes" : "no");
1802 acpi_video_bus_remove_fs(device);
1806 return_VALUE(result);
1809 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1811 acpi_status status = 0;
1812 struct acpi_video_bus *video = NULL;
1814 ACPI_FUNCTION_TRACE("acpi_video_bus_remove");
1816 if (!device || !acpi_driver_data(device))
1817 return_VALUE(-EINVAL);
1819 video = (struct acpi_video_bus *)acpi_driver_data(device);
1821 acpi_video_bus_stop_devices(video);
1823 status = acpi_remove_notify_handler(video->handle,
1825 acpi_video_bus_notify);
1826 if (ACPI_FAILURE(status))
1827 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1828 "Error removing notify handler\n"));
1830 acpi_video_bus_put_devices(video);
1831 acpi_video_bus_remove_fs(device);
1833 if (video->attached_array)
1834 kfree(video->attached_array);
1841 acpi_video_bus_match(struct acpi_device *device, struct acpi_driver *driver)
1843 acpi_handle h_dummy1;
1844 acpi_handle h_dummy2;
1845 acpi_handle h_dummy3;
1847 ACPI_FUNCTION_TRACE("acpi_video_bus_match");
1849 if (!device || !driver)
1850 return_VALUE(-EINVAL);
1852 /* Since there is no HID, CID for ACPI Video drivers, we have
1853 * to check well known required nodes for each feature we support.
1856 /* Does this device able to support video switching ? */
1857 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
1858 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
1861 /* Does this device able to retrieve a video ROM ? */
1862 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
1865 /* Does this device able to configure which video head to be POSTed ? */
1866 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
1867 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
1868 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
1871 return_VALUE(-ENODEV);
1874 static int __init acpi_video_init(void)
1878 ACPI_FUNCTION_TRACE("acpi_video_init");
1881 acpi_dbg_level = 0xFFFFFFFF;
1882 acpi_dbg_layer = 0x08000000;
1885 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1886 if (!acpi_video_dir)
1887 return_VALUE(-ENODEV);
1888 acpi_video_dir->owner = THIS_MODULE;
1890 result = acpi_bus_register_driver(&acpi_video_bus);
1892 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1893 return_VALUE(-ENODEV);
1899 static void __exit acpi_video_exit(void)
1901 ACPI_FUNCTION_TRACE("acpi_video_exit");
1903 acpi_bus_unregister_driver(&acpi_video_bus);
1905 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1910 module_init(acpi_video_init);
1911 module_exit(acpi_video_exit);