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 };
302 ACPI_FUNCTION_TRACE("acpi_video_device_set_state");
304 arg0.integer.value = state;
305 status = acpi_evaluate_integer(device->handle, "_DSS", &args, &ret);
307 return_VALUE(status);
311 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
312 union acpi_object **levels)
315 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
316 union acpi_object *obj;
318 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_query_levels");
322 status = acpi_evaluate_object(device->handle, "_BCL", NULL, &buffer);
323 if (!ACPI_SUCCESS(status))
324 return_VALUE(status);
325 obj = (union acpi_object *)buffer.pointer;
326 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
327 printk(KERN_ERR PREFIX "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 printk(KERN_ERR PREFIX "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 printk(KERN_ERR PREFIX "Invalid data\n");
566 br->levels[count] = (u32) o->integer.value;
575 device->brightness = br;
576 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
577 "found %d brightness levels\n",
590 * device : video output device (VGA)
595 * Find out all required AML method defined under the video bus device.
598 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
600 acpi_handle h_dummy1;
602 memset(&video->cap, 0, 4);
603 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
606 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
609 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
612 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
615 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
618 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
624 * Check whether the video bus device has required AML method to
625 * support the desired features
628 static int acpi_video_bus_check(struct acpi_video_bus *video)
630 acpi_status status = -ENOENT;
632 ACPI_FUNCTION_TRACE("acpi_video_bus_check");
635 return_VALUE(-EINVAL);
637 /* Since there is no HID, CID and so on for VGA driver, we have
638 * to check well known required nodes.
641 /* Does this device able to support video switching ? */
642 if (video->cap._DOS) {
643 video->flags.multihead = 1;
647 /* Does this device able to retrieve a retrieve a video ROM ? */
648 if (video->cap._ROM) {
649 video->flags.rom = 1;
653 /* Does this device able to configure which video device to POST ? */
654 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
655 video->flags.post = 1;
659 return_VALUE(status);
662 /* --------------------------------------------------------------------------
664 -------------------------------------------------------------------------- */
666 static struct proc_dir_entry *acpi_video_dir;
670 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
672 struct acpi_video_device *dev =
673 (struct acpi_video_device *)seq->private;
675 ACPI_FUNCTION_TRACE("acpi_video_device_info_seq_show");
680 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
681 seq_printf(seq, "type: ");
683 seq_printf(seq, "CRT\n");
684 else if (dev->flags.lcd)
685 seq_printf(seq, "LCD\n");
686 else if (dev->flags.tvout)
687 seq_printf(seq, "TVOUT\n");
689 seq_printf(seq, "UNKNOWN\n");
691 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
698 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
700 return single_open(file, acpi_video_device_info_seq_show,
704 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
707 struct acpi_video_device *dev =
708 (struct acpi_video_device *)seq->private;
711 ACPI_FUNCTION_TRACE("acpi_video_device_state_seq_show");
716 status = acpi_video_device_get_state(dev, &state);
717 seq_printf(seq, "state: ");
718 if (ACPI_SUCCESS(status))
719 seq_printf(seq, "0x%02lx\n", state);
721 seq_printf(seq, "<not supported>\n");
723 status = acpi_video_device_query(dev, &state);
724 seq_printf(seq, "query: ");
725 if (ACPI_SUCCESS(status))
726 seq_printf(seq, "0x%02lx\n", state);
728 seq_printf(seq, "<not supported>\n");
735 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
737 return single_open(file, acpi_video_device_state_seq_show,
742 acpi_video_device_write_state(struct file *file,
743 const char __user * buffer,
744 size_t count, loff_t * data)
747 struct seq_file *m = (struct seq_file *)file->private_data;
748 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
749 char str[12] = { 0 };
752 ACPI_FUNCTION_TRACE("acpi_video_device_write_state");
754 if (!dev || count + 1 > sizeof str)
755 return_VALUE(-EINVAL);
757 if (copy_from_user(str, buffer, count))
758 return_VALUE(-EFAULT);
761 state = simple_strtoul(str, NULL, 0);
762 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
764 status = acpi_video_device_set_state(dev, state);
767 return_VALUE(-EFAULT);
773 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
775 struct acpi_video_device *dev =
776 (struct acpi_video_device *)seq->private;
779 ACPI_FUNCTION_TRACE("acpi_video_device_brightness_seq_show");
781 if (!dev || !dev->brightness) {
782 seq_printf(seq, "<not supported>\n");
786 seq_printf(seq, "levels: ");
787 for (i = 0; i < dev->brightness->count; i++)
788 seq_printf(seq, " %d", dev->brightness->levels[i]);
789 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
795 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
797 return single_open(file, acpi_video_device_brightness_seq_show,
802 acpi_video_device_write_brightness(struct file *file,
803 const char __user * buffer,
804 size_t count, loff_t * data)
806 struct seq_file *m = (struct seq_file *)file->private_data;
807 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
809 unsigned int level = 0;
812 ACPI_FUNCTION_TRACE("acpi_video_device_write_brightness");
814 if (!dev || !dev->brightness || count + 1 > sizeof str)
815 return_VALUE(-EINVAL);
817 if (copy_from_user(str, buffer, count))
818 return_VALUE(-EFAULT);
821 level = simple_strtoul(str, NULL, 0);
824 return_VALUE(-EFAULT);
826 /* validate though the list of available levels */
827 for (i = 0; i < dev->brightness->count; i++)
828 if (level == dev->brightness->levels[i]) {
830 (acpi_video_device_lcd_set_level(dev, level)))
831 dev->brightness->curr = level;
838 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
840 struct acpi_video_device *dev =
841 (struct acpi_video_device *)seq->private;
844 union acpi_object *edid = NULL;
846 ACPI_FUNCTION_TRACE("acpi_video_device_EDID_seq_show");
851 status = acpi_video_device_EDID(dev, &edid, 128);
852 if (ACPI_FAILURE(status)) {
853 status = acpi_video_device_EDID(dev, &edid, 256);
856 if (ACPI_FAILURE(status)) {
860 if (edid && edid->type == ACPI_TYPE_BUFFER) {
861 for (i = 0; i < edid->buffer.length; i++)
862 seq_putc(seq, edid->buffer.pointer[i]);
867 seq_printf(seq, "<not supported>\n");
875 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
877 return single_open(file, acpi_video_device_EDID_seq_show,
881 static int acpi_video_device_add_fs(struct acpi_device *device)
883 struct proc_dir_entry *entry = NULL;
884 struct acpi_video_device *vid_dev;
886 ACPI_FUNCTION_TRACE("acpi_video_device_add_fs");
889 return_VALUE(-ENODEV);
891 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
893 return_VALUE(-ENODEV);
895 if (!acpi_device_dir(device)) {
896 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
897 vid_dev->video->dir);
898 if (!acpi_device_dir(device))
899 return_VALUE(-ENODEV);
900 acpi_device_dir(device)->owner = THIS_MODULE;
904 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
906 return_VALUE(-ENODEV);
908 entry->proc_fops = &acpi_video_device_info_fops;
909 entry->data = acpi_driver_data(device);
910 entry->owner = THIS_MODULE;
915 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
916 acpi_device_dir(device));
918 return_VALUE(-ENODEV);
920 acpi_video_device_state_fops.write = acpi_video_device_write_state;
921 entry->proc_fops = &acpi_video_device_state_fops;
922 entry->data = acpi_driver_data(device);
923 entry->owner = THIS_MODULE;
926 /* 'brightness' [R/W] */
928 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
929 acpi_device_dir(device));
931 return_VALUE(-ENODEV);
933 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
934 entry->proc_fops = &acpi_video_device_brightness_fops;
935 entry->data = acpi_driver_data(device);
936 entry->owner = THIS_MODULE;
940 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
942 return_VALUE(-ENODEV);
944 entry->proc_fops = &acpi_video_device_EDID_fops;
945 entry->data = acpi_driver_data(device);
946 entry->owner = THIS_MODULE;
952 static int acpi_video_device_remove_fs(struct acpi_device *device)
954 struct acpi_video_device *vid_dev;
955 ACPI_FUNCTION_TRACE("acpi_video_device_remove_fs");
957 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
958 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
959 return_VALUE(-ENODEV);
961 if (acpi_device_dir(device)) {
962 remove_proc_entry("info", acpi_device_dir(device));
963 remove_proc_entry("state", acpi_device_dir(device));
964 remove_proc_entry("brightness", acpi_device_dir(device));
965 remove_proc_entry("EDID", acpi_device_dir(device));
966 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
967 acpi_device_dir(device) = NULL;
974 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
976 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
978 ACPI_FUNCTION_TRACE("acpi_video_bus_info_seq_show");
983 seq_printf(seq, "Switching heads: %s\n",
984 video->flags.multihead ? "yes" : "no");
985 seq_printf(seq, "Video ROM: %s\n",
986 video->flags.rom ? "yes" : "no");
987 seq_printf(seq, "Device to be POSTed on boot: %s\n",
988 video->flags.post ? "yes" : "no");
994 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
996 return single_open(file, acpi_video_bus_info_seq_show,
1000 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1002 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1004 ACPI_FUNCTION_TRACE("acpi_video_bus_ROM_seq_show");
1009 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1010 seq_printf(seq, "<TODO>\n");
1016 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1018 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1021 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1023 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1024 unsigned long options;
1027 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_info_seq_show");
1032 status = acpi_video_bus_POST_options(video, &options);
1033 if (ACPI_SUCCESS(status)) {
1034 if (!(options & 1)) {
1035 printk(KERN_WARNING PREFIX
1036 "The motherboard VGA device is not listed as a possible POST device.\n");
1037 printk(KERN_WARNING PREFIX
1038 "This indicate a BIOS bug. Please contact the manufacturer.\n");
1040 printk("%lx\n", options);
1041 seq_printf(seq, "can POST: <intgrated video>");
1043 seq_printf(seq, " <PCI video>");
1045 seq_printf(seq, " <AGP video>");
1046 seq_putc(seq, '\n');
1048 seq_printf(seq, "<not supported>\n");
1054 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1056 return single_open(file, acpi_video_bus_POST_info_seq_show,
1060 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1062 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1066 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_seq_show");
1071 status = acpi_video_bus_get_POST(video, &id);
1072 if (!ACPI_SUCCESS(status)) {
1073 seq_printf(seq, "<not supported>\n");
1076 seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
1082 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1084 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1086 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS_seq_show");
1088 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1093 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1095 return single_open(file, acpi_video_bus_POST_seq_show,
1099 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1101 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1105 acpi_video_bus_write_POST(struct file *file,
1106 const char __user * buffer,
1107 size_t count, loff_t * data)
1110 struct seq_file *m = (struct seq_file *)file->private_data;
1111 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1112 char str[12] = { 0 };
1113 unsigned long opt, options;
1115 ACPI_FUNCTION_TRACE("acpi_video_bus_write_POST");
1117 if (!video || count + 1 > sizeof str)
1118 return_VALUE(-EINVAL);
1120 status = acpi_video_bus_POST_options(video, &options);
1121 if (!ACPI_SUCCESS(status))
1122 return_VALUE(-EINVAL);
1124 if (copy_from_user(str, buffer, count))
1125 return_VALUE(-EFAULT);
1128 opt = strtoul(str, NULL, 0);
1130 return_VALUE(-EFAULT);
1132 /* just in case an OEM 'forget' the motherboard... */
1135 if (options & (1ul << opt)) {
1136 status = acpi_video_bus_set_POST(video, opt);
1137 if (!ACPI_SUCCESS(status))
1138 return_VALUE(-EFAULT);
1142 return_VALUE(count);
1146 acpi_video_bus_write_DOS(struct file *file,
1147 const char __user * buffer,
1148 size_t count, loff_t * data)
1151 struct seq_file *m = (struct seq_file *)file->private_data;
1152 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1153 char str[12] = { 0 };
1156 ACPI_FUNCTION_TRACE("acpi_video_bus_write_DOS");
1158 if (!video || count + 1 > sizeof str)
1159 return_VALUE(-EINVAL);
1161 if (copy_from_user(str, buffer, count))
1162 return_VALUE(-EFAULT);
1165 opt = strtoul(str, NULL, 0);
1167 return_VALUE(-EFAULT);
1169 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1171 if (!ACPI_SUCCESS(status))
1172 return_VALUE(-EFAULT);
1174 return_VALUE(count);
1177 static int acpi_video_bus_add_fs(struct acpi_device *device)
1179 struct proc_dir_entry *entry = NULL;
1180 struct acpi_video_bus *video;
1182 ACPI_FUNCTION_TRACE("acpi_video_bus_add_fs");
1184 video = (struct acpi_video_bus *)acpi_driver_data(device);
1186 if (!acpi_device_dir(device)) {
1187 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1189 if (!acpi_device_dir(device))
1190 return_VALUE(-ENODEV);
1191 video->dir = acpi_device_dir(device);
1192 acpi_device_dir(device)->owner = THIS_MODULE;
1196 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1198 return_VALUE(-ENODEV);
1200 entry->proc_fops = &acpi_video_bus_info_fops;
1201 entry->data = acpi_driver_data(device);
1202 entry->owner = THIS_MODULE;
1206 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1208 return_VALUE(-ENODEV);
1210 entry->proc_fops = &acpi_video_bus_ROM_fops;
1211 entry->data = acpi_driver_data(device);
1212 entry->owner = THIS_MODULE;
1215 /* 'POST_info' [R] */
1217 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1219 return_VALUE(-ENODEV);
1221 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1222 entry->data = acpi_driver_data(device);
1223 entry->owner = THIS_MODULE;
1228 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1229 acpi_device_dir(device));
1231 return_VALUE(-ENODEV);
1233 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1234 entry->proc_fops = &acpi_video_bus_POST_fops;
1235 entry->data = acpi_driver_data(device);
1236 entry->owner = THIS_MODULE;
1241 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1242 acpi_device_dir(device));
1244 return_VALUE(-ENODEV);
1246 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1247 entry->proc_fops = &acpi_video_bus_DOS_fops;
1248 entry->data = acpi_driver_data(device);
1249 entry->owner = THIS_MODULE;
1255 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1257 struct acpi_video_bus *video;
1259 ACPI_FUNCTION_TRACE("acpi_video_bus_remove_fs");
1261 video = (struct acpi_video_bus *)acpi_driver_data(device);
1263 if (acpi_device_dir(device)) {
1264 remove_proc_entry("info", acpi_device_dir(device));
1265 remove_proc_entry("ROM", acpi_device_dir(device));
1266 remove_proc_entry("POST_info", acpi_device_dir(device));
1267 remove_proc_entry("POST", acpi_device_dir(device));
1268 remove_proc_entry("DOS", acpi_device_dir(device));
1269 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1270 acpi_device_dir(device) = NULL;
1276 /* --------------------------------------------------------------------------
1278 -------------------------------------------------------------------------- */
1280 /* device interface */
1283 acpi_video_bus_get_one_device(struct acpi_device *device,
1284 struct acpi_video_bus *video)
1286 unsigned long device_id;
1288 struct acpi_video_device *data;
1290 ACPI_FUNCTION_TRACE("acpi_video_bus_get_one_device");
1292 if (!device || !video)
1293 return_VALUE(-EINVAL);
1296 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1297 if (ACPI_SUCCESS(status)) {
1299 data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1301 return_VALUE(-ENOMEM);
1303 memset(data, 0, sizeof(struct acpi_video_device));
1305 data->handle = device->handle;
1306 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1307 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1308 acpi_driver_data(device) = data;
1310 data->device_id = device_id;
1311 data->video = video;
1314 switch (device_id & 0xffff) {
1316 data->flags.crt = 1;
1319 data->flags.lcd = 1;
1322 data->flags.tvout = 1;
1325 data->flags.unknown = 1;
1329 acpi_video_device_bind(video, data);
1330 acpi_video_device_find_cap(data);
1332 status = acpi_install_notify_handler(data->handle,
1334 acpi_video_device_notify,
1336 if (ACPI_FAILURE(status)) {
1337 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1338 "Error installing notify handler\n"));
1339 if(data->brightness)
1340 kfree(data->brightness->levels);
1341 kfree(data->brightness);
1347 list_add_tail(&data->entry, &video->video_device_list);
1350 acpi_video_device_add_fs(device);
1355 return_VALUE(-ENOENT);
1360 * video : video bus device
1365 * Enumerate the video device list of the video bus,
1366 * bind the ids with the corresponding video devices
1367 * under the video bus.
1370 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1372 struct list_head *node, *next;
1373 list_for_each_safe(node, next, &video->video_device_list) {
1374 struct acpi_video_device *dev =
1375 container_of(node, struct acpi_video_device, entry);
1376 acpi_video_device_bind(video, dev);
1382 * video : video bus device
1383 * device : video output device under the video
1389 * Bind the ids with the corresponding video devices
1390 * under the video bus.
1394 acpi_video_device_bind(struct acpi_video_bus *video,
1395 struct acpi_video_device *device)
1398 ACPI_FUNCTION_TRACE("acpi_video_device_bind");
1400 #define IDS_VAL(i) video->attached_array[i].value.int_val
1401 #define IDS_BIND(i) video->attached_array[i].bind_info
1403 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1404 i < video->attached_count; i++) {
1405 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1406 IDS_BIND(i) = device;
1407 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1416 * video : video bus device
1421 * Call _DOD to enumerate all devices attached to display adapter
1425 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1430 struct acpi_video_enumerated_device *active_device_list;
1431 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1432 union acpi_object *dod = NULL;
1433 union acpi_object *obj;
1435 ACPI_FUNCTION_TRACE("acpi_video_device_enumerate");
1437 status = acpi_evaluate_object(video->handle, "_DOD", NULL, &buffer);
1438 if (!ACPI_SUCCESS(status)) {
1439 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1440 return_VALUE(status);
1443 dod = (union acpi_object *)buffer.pointer;
1444 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1445 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1450 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1451 dod->package.count));
1453 active_device_list = kmalloc((1 +
1454 dod->package.count) *
1456 acpi_video_enumerated_device),
1459 if (!active_device_list) {
1465 for (i = 0; i < dod->package.count; i++) {
1466 obj = (union acpi_object *)&dod->package.elements[i];
1468 if (obj->type != ACPI_TYPE_INTEGER) {
1469 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1470 active_device_list[i].value.int_val =
1471 ACPI_VIDEO_HEAD_INVALID;
1473 active_device_list[i].value.int_val = obj->integer.value;
1474 active_device_list[i].bind_info = NULL;
1475 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1476 (int)obj->integer.value));
1479 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1481 kfree(video->attached_array);
1483 video->attached_array = active_device_list;
1484 video->attached_count = count;
1486 acpi_os_free(buffer.pointer);
1487 return_VALUE(status);
1492 * video : video bus device
1493 * event : Nontify Event
1498 * 1. Find out the current active output device.
1499 * 2. Identify the next output device to switch
1500 * 3. call _DSS to do actual switch.
1503 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1505 struct list_head *node, *next;
1506 struct acpi_video_device *dev = NULL;
1507 struct acpi_video_device *dev_next = NULL;
1508 struct acpi_video_device *dev_prev = NULL;
1509 unsigned long state;
1512 ACPI_FUNCTION_TRACE("acpi_video_switch_output");
1514 list_for_each_safe(node, next, &video->video_device_list) {
1515 dev = container_of(node, struct acpi_video_device, entry);
1516 status = acpi_video_device_get_state(dev, &state);
1519 container_of(node->next, struct acpi_video_device,
1522 container_of(node->prev, struct acpi_video_device,
1527 dev_next = container_of(node->next, struct acpi_video_device, entry);
1528 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1531 case ACPI_VIDEO_NOTIFY_CYCLE:
1532 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1533 acpi_video_device_set_state(dev, 0);
1534 acpi_video_device_set_state(dev_next, 0x80000001);
1536 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1537 acpi_video_device_set_state(dev, 0);
1538 acpi_video_device_set_state(dev_prev, 0x80000001);
1543 return_VALUE(status);
1547 acpi_video_get_next_level(struct acpi_video_device *device,
1548 u32 level_current, u32 event)
1551 return level_current;
1555 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1557 unsigned long level_current, level_next;
1558 acpi_video_device_lcd_get_level_current(device, &level_current);
1559 level_next = acpi_video_get_next_level(device, level_current, event);
1560 acpi_video_device_lcd_set_level(device, level_next);
1564 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1565 struct acpi_device *device)
1568 struct list_head *node, *next;
1570 ACPI_FUNCTION_TRACE("acpi_video_get_devices");
1572 acpi_video_device_enumerate(video);
1574 list_for_each_safe(node, next, &device->children) {
1575 struct acpi_device *dev =
1576 list_entry(node, struct acpi_device, node);
1581 status = acpi_video_bus_get_one_device(dev, video);
1582 if (ACPI_FAILURE(status)) {
1583 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1588 return_VALUE(status);
1591 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1594 struct acpi_video_bus *video;
1596 ACPI_FUNCTION_TRACE("acpi_video_bus_put_one_device");
1598 if (!device || !device->video)
1599 return_VALUE(-ENOENT);
1601 video = device->video;
1604 list_del(&device->entry);
1606 acpi_video_device_remove_fs(device->dev);
1608 status = acpi_remove_notify_handler(device->handle,
1610 acpi_video_device_notify);
1615 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1618 struct list_head *node, *next;
1620 ACPI_FUNCTION_TRACE("acpi_video_bus_put_devices");
1622 list_for_each_safe(node, next, &video->video_device_list) {
1623 struct acpi_video_device *data =
1624 list_entry(node, struct acpi_video_device, entry);
1628 status = acpi_video_bus_put_one_device(data);
1629 if (ACPI_FAILURE(status))
1630 printk(KERN_WARNING PREFIX
1631 "hhuuhhuu bug in acpi video driver.\n");
1633 if (data->brightness)
1634 kfree(data->brightness->levels);
1635 kfree(data->brightness);
1642 /* acpi_video interface */
1644 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1646 return acpi_video_bus_DOS(video, 1, 0);
1649 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1651 return acpi_video_bus_DOS(video, 0, 1);
1654 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1656 struct acpi_video_bus *video = (struct acpi_video_bus *)data;
1657 struct acpi_device *device = NULL;
1659 ACPI_FUNCTION_TRACE("acpi_video_bus_notify");
1660 printk("video bus notify\n");
1665 if (acpi_bus_get_device(handle, &device))
1669 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1670 * most likely via hotkey. */
1671 acpi_bus_generate_event(device, event, 0);
1674 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1676 acpi_video_device_enumerate(video);
1677 acpi_video_device_rebind(video);
1678 acpi_video_switch_output(video, event);
1679 acpi_bus_generate_event(device, event, 0);
1682 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1683 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1684 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1685 acpi_video_switch_output(video, event);
1686 acpi_bus_generate_event(device, event, 0);
1690 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1691 "Unsupported event [0x%x]\n", event));
1698 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1700 struct acpi_video_device *video_device =
1701 (struct acpi_video_device *)data;
1702 struct acpi_device *device = NULL;
1704 ACPI_FUNCTION_TRACE("acpi_video_device_notify");
1706 printk("video device notify\n");
1710 if (acpi_bus_get_device(handle, &device))
1714 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1715 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1716 acpi_bus_generate_event(device, event, 0);
1718 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1719 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1720 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1721 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1722 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1723 acpi_video_switch_brightness(video_device, event);
1724 acpi_bus_generate_event(device, event, 0);
1727 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1728 "Unsupported event [0x%x]\n", event));
1734 static int acpi_video_bus_add(struct acpi_device *device)
1737 acpi_status status = 0;
1738 struct acpi_video_bus *video = NULL;
1740 ACPI_FUNCTION_TRACE("acpi_video_bus_add");
1743 return_VALUE(-EINVAL);
1745 video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1747 return_VALUE(-ENOMEM);
1748 memset(video, 0, sizeof(struct acpi_video_bus));
1750 video->handle = device->handle;
1751 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1752 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1753 acpi_driver_data(device) = video;
1755 acpi_video_bus_find_cap(video);
1756 result = acpi_video_bus_check(video);
1760 result = acpi_video_bus_add_fs(device);
1764 init_MUTEX(&video->sem);
1765 INIT_LIST_HEAD(&video->video_device_list);
1767 acpi_video_bus_get_devices(video, device);
1768 acpi_video_bus_start_devices(video);
1770 status = acpi_install_notify_handler(video->handle,
1772 acpi_video_bus_notify, video);
1773 if (ACPI_FAILURE(status)) {
1774 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1775 "Error installing notify handler\n"));
1776 acpi_video_bus_stop_devices(video);
1777 acpi_video_bus_put_devices(video);
1778 kfree(video->attached_array);
1779 acpi_video_bus_remove_fs(device);
1784 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1785 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1786 video->flags.multihead ? "yes" : "no",
1787 video->flags.rom ? "yes" : "no",
1788 video->flags.post ? "yes" : "no");
1794 return_VALUE(result);
1797 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1799 acpi_status status = 0;
1800 struct acpi_video_bus *video = NULL;
1802 ACPI_FUNCTION_TRACE("acpi_video_bus_remove");
1804 if (!device || !acpi_driver_data(device))
1805 return_VALUE(-EINVAL);
1807 video = (struct acpi_video_bus *)acpi_driver_data(device);
1809 acpi_video_bus_stop_devices(video);
1811 status = acpi_remove_notify_handler(video->handle,
1813 acpi_video_bus_notify);
1815 acpi_video_bus_put_devices(video);
1816 acpi_video_bus_remove_fs(device);
1818 kfree(video->attached_array);
1825 acpi_video_bus_match(struct acpi_device *device, struct acpi_driver *driver)
1827 acpi_handle h_dummy1;
1828 acpi_handle h_dummy2;
1829 acpi_handle h_dummy3;
1831 ACPI_FUNCTION_TRACE("acpi_video_bus_match");
1833 if (!device || !driver)
1834 return_VALUE(-EINVAL);
1836 /* Since there is no HID, CID for ACPI Video drivers, we have
1837 * to check well known required nodes for each feature we support.
1840 /* Does this device able to support video switching ? */
1841 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
1842 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
1845 /* Does this device able to retrieve a video ROM ? */
1846 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
1849 /* Does this device able to configure which video head to be POSTed ? */
1850 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
1851 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
1852 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
1855 return_VALUE(-ENODEV);
1858 static int __init acpi_video_init(void)
1862 ACPI_FUNCTION_TRACE("acpi_video_init");
1865 acpi_dbg_level = 0xFFFFFFFF;
1866 acpi_dbg_layer = 0x08000000;
1869 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1870 if (!acpi_video_dir)
1871 return_VALUE(-ENODEV);
1872 acpi_video_dir->owner = THIS_MODULE;
1874 result = acpi_bus_register_driver(&acpi_video_bus);
1876 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1877 return_VALUE(-ENODEV);
1883 static void __exit acpi_video_exit(void)
1885 ACPI_FUNCTION_TRACE("acpi_video_exit");
1887 acpi_bus_unregister_driver(&acpi_video_bus);
1889 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1894 module_init(acpi_video_init);
1895 module_exit(acpi_video_exit);