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 <linux/sort.h>
40 #include <linux/pci.h>
41 #include <linux/pci_ids.h>
42 #include <asm/uaccess.h>
44 #include <acpi/acpi_bus.h>
45 #include <acpi/acpi_drivers.h>
47 #define PREFIX "ACPI: "
49 #define ACPI_VIDEO_CLASS "video"
50 #define ACPI_VIDEO_BUS_NAME "Video Bus"
51 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
52 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
53 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
54 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
55 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
56 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
58 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
59 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
60 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
61 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
62 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
64 #define MAX_NAME_LEN 20
66 #define ACPI_VIDEO_DISPLAY_CRT 1
67 #define ACPI_VIDEO_DISPLAY_TV 2
68 #define ACPI_VIDEO_DISPLAY_DVI 3
69 #define ACPI_VIDEO_DISPLAY_LCD 4
71 #define _COMPONENT ACPI_VIDEO_COMPONENT
72 ACPI_MODULE_NAME("video");
74 MODULE_AUTHOR("Bruno Ducrot");
75 MODULE_DESCRIPTION("ACPI Video Driver");
76 MODULE_LICENSE("GPL");
78 static int brightness_switch_enabled = 1;
79 module_param(brightness_switch_enabled, bool, 0644);
81 static int register_count = 0;
82 static int acpi_video_bus_add(struct acpi_device *device);
83 static int acpi_video_bus_remove(struct acpi_device *device, int type);
84 static int acpi_video_resume(struct acpi_device *device);
85 static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
87 static const struct acpi_device_id video_device_ids[] = {
91 MODULE_DEVICE_TABLE(acpi, video_device_ids);
93 static struct acpi_driver acpi_video_bus = {
95 .class = ACPI_VIDEO_CLASS,
96 .ids = video_device_ids,
98 .add = acpi_video_bus_add,
99 .remove = acpi_video_bus_remove,
100 .resume = acpi_video_resume,
101 .notify = acpi_video_bus_notify,
105 struct acpi_video_bus_flags {
106 u8 multihead:1; /* can switch video heads */
107 u8 rom:1; /* can retrieve a video rom */
108 u8 post:1; /* can configure the head to */
112 struct acpi_video_bus_cap {
113 u8 _DOS:1; /*Enable/Disable output switching */
114 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
115 u8 _ROM:1; /*Get ROM Data */
116 u8 _GPD:1; /*Get POST Device */
117 u8 _SPD:1; /*Set POST Device */
118 u8 _VPO:1; /*Video POST Options */
122 struct acpi_video_device_attrib {
123 u32 display_index:4; /* A zero-based instance of the Display */
124 u32 display_port_attachment:4; /*This field differentiates the display type */
125 u32 display_type:4; /*Describe the specific type in use */
126 u32 vendor_specific:4; /*Chipset Vendor Specific */
127 u32 bios_can_detect:1; /*BIOS can detect the device */
128 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
130 u32 pipe_id:3; /*For VGA multiple-head devices. */
131 u32 reserved:10; /*Must be 0 */
132 u32 device_id_scheme:1; /*Device ID Scheme */
135 struct acpi_video_enumerated_device {
138 struct acpi_video_device_attrib attrib;
140 struct acpi_video_device *bind_info;
143 struct acpi_video_bus {
144 struct acpi_device *device;
146 struct acpi_video_enumerated_device *attached_array;
148 struct acpi_video_bus_cap cap;
149 struct acpi_video_bus_flags flags;
150 struct list_head video_device_list;
151 struct mutex device_list_lock; /* protects video_device_list */
152 struct proc_dir_entry *dir;
153 struct input_dev *input;
154 char phys[32]; /* for input device */
157 struct acpi_video_device_flags {
167 struct acpi_video_device_cap {
168 u8 _ADR:1; /*Return the unique ID */
169 u8 _BCL:1; /*Query list of brightness control levels supported */
170 u8 _BCM:1; /*Set the brightness level */
171 u8 _BQC:1; /* Get current brightness level */
172 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
173 u8 _DDC:1; /*Return the EDID for this device */
174 u8 _DCS:1; /*Return status of output device */
175 u8 _DGS:1; /*Query graphics state */
176 u8 _DSS:1; /*Device state set */
179 struct acpi_video_brightness_flags {
180 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
181 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
182 u8 _BCL_use_index:1; /* levels in _BCL are index values */
183 u8 _BCM_use_index:1; /* input of _BCM is an index value */
184 u8 _BQC_use_index:1; /* _BQC returns an index value */
187 struct acpi_video_device_brightness {
191 struct acpi_video_brightness_flags flags;
194 struct acpi_video_device {
195 unsigned long device_id;
196 struct acpi_video_device_flags flags;
197 struct acpi_video_device_cap cap;
198 struct list_head entry;
199 struct acpi_video_bus *video;
200 struct acpi_device *dev;
201 struct acpi_video_device_brightness *brightness;
202 struct backlight_device *backlight;
203 struct thermal_cooling_device *cdev;
204 struct output_device *output_dev;
208 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
209 static const struct file_operations acpi_video_bus_info_fops = {
210 .owner = THIS_MODULE,
211 .open = acpi_video_bus_info_open_fs,
214 .release = single_release,
217 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
218 static const struct file_operations acpi_video_bus_ROM_fops = {
219 .owner = THIS_MODULE,
220 .open = acpi_video_bus_ROM_open_fs,
223 .release = single_release,
226 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
228 static const struct file_operations acpi_video_bus_POST_info_fops = {
229 .owner = THIS_MODULE,
230 .open = acpi_video_bus_POST_info_open_fs,
233 .release = single_release,
236 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
237 static ssize_t acpi_video_bus_write_POST(struct file *file,
238 const char __user *buffer, size_t count, loff_t *data);
239 static const struct file_operations acpi_video_bus_POST_fops = {
240 .owner = THIS_MODULE,
241 .open = acpi_video_bus_POST_open_fs,
243 .write = acpi_video_bus_write_POST,
245 .release = single_release,
248 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
249 static ssize_t acpi_video_bus_write_DOS(struct file *file,
250 const char __user *buffer, size_t count, loff_t *data);
251 static const struct file_operations acpi_video_bus_DOS_fops = {
252 .owner = THIS_MODULE,
253 .open = acpi_video_bus_DOS_open_fs,
255 .write = acpi_video_bus_write_DOS,
257 .release = single_release,
261 static int acpi_video_device_info_open_fs(struct inode *inode,
263 static const struct file_operations acpi_video_device_info_fops = {
264 .owner = THIS_MODULE,
265 .open = acpi_video_device_info_open_fs,
268 .release = single_release,
271 static int acpi_video_device_state_open_fs(struct inode *inode,
273 static ssize_t acpi_video_device_write_state(struct file *file,
274 const char __user *buffer, size_t count, loff_t *data);
275 static const struct file_operations acpi_video_device_state_fops = {
276 .owner = THIS_MODULE,
277 .open = acpi_video_device_state_open_fs,
279 .write = acpi_video_device_write_state,
281 .release = single_release,
284 static int acpi_video_device_brightness_open_fs(struct inode *inode,
286 static ssize_t acpi_video_device_write_brightness(struct file *file,
287 const char __user *buffer, size_t count, loff_t *data);
288 static struct file_operations acpi_video_device_brightness_fops = {
289 .owner = THIS_MODULE,
290 .open = acpi_video_device_brightness_open_fs,
292 .write = acpi_video_device_write_brightness,
294 .release = single_release,
297 static int acpi_video_device_EDID_open_fs(struct inode *inode,
299 static const struct file_operations acpi_video_device_EDID_fops = {
300 .owner = THIS_MODULE,
301 .open = acpi_video_device_EDID_open_fs,
304 .release = single_release,
307 static const char device_decode[][30] = {
308 "motherboard VGA device",
314 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
315 static void acpi_video_device_rebind(struct acpi_video_bus *video);
316 static void acpi_video_device_bind(struct acpi_video_bus *video,
317 struct acpi_video_device *device);
318 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
319 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
321 static int acpi_video_device_lcd_get_level_current(
322 struct acpi_video_device *device,
323 unsigned long long *level);
324 static int acpi_video_get_next_level(struct acpi_video_device *device,
325 u32 level_current, u32 event);
326 static int acpi_video_switch_brightness(struct acpi_video_device *device,
328 static int acpi_video_device_get_state(struct acpi_video_device *device,
329 unsigned long long *state);
330 static int acpi_video_output_get(struct output_device *od);
331 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
333 /*backlight device sysfs support*/
334 static int acpi_video_get_brightness(struct backlight_device *bd)
336 unsigned long long cur_level;
338 struct acpi_video_device *vd =
339 (struct acpi_video_device *)bl_get_data(bd);
341 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
343 for (i = 2; i < vd->brightness->count; i++) {
344 if (vd->brightness->levels[i] == cur_level)
345 /* The first two entries are special - see page 575
346 of the ACPI spec 3.0 */
352 static int acpi_video_set_brightness(struct backlight_device *bd)
354 int request_level = bd->props.brightness + 2;
355 struct acpi_video_device *vd =
356 (struct acpi_video_device *)bl_get_data(bd);
358 return acpi_video_device_lcd_set_level(vd,
359 vd->brightness->levels[request_level]);
362 static struct backlight_ops acpi_backlight_ops = {
363 .get_brightness = acpi_video_get_brightness,
364 .update_status = acpi_video_set_brightness,
367 /*video output device sysfs support*/
368 static int acpi_video_output_get(struct output_device *od)
370 unsigned long long state;
371 struct acpi_video_device *vd =
372 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
373 acpi_video_device_get_state(vd, &state);
377 static int acpi_video_output_set(struct output_device *od)
379 unsigned long state = od->request_state;
380 struct acpi_video_device *vd=
381 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
382 return acpi_video_device_set_state(vd, state);
385 static struct output_properties acpi_output_properties = {
386 .set_state = acpi_video_output_set,
387 .get_status = acpi_video_output_get,
391 /* thermal cooling device callbacks */
392 static int video_get_max_state(struct thermal_cooling_device *cdev, unsigned
395 struct acpi_device *device = cdev->devdata;
396 struct acpi_video_device *video = acpi_driver_data(device);
398 *state = video->brightness->count - 3;
402 static int video_get_cur_state(struct thermal_cooling_device *cdev, unsigned
405 struct acpi_device *device = cdev->devdata;
406 struct acpi_video_device *video = acpi_driver_data(device);
407 unsigned long long level;
410 if (acpi_video_device_lcd_get_level_current(video, &level))
412 for (offset = 2; offset < video->brightness->count; offset++)
413 if (level == video->brightness->levels[offset]) {
414 *state = video->brightness->count - offset - 1;
422 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
424 struct acpi_device *device = cdev->devdata;
425 struct acpi_video_device *video = acpi_driver_data(device);
428 if ( state >= video->brightness->count - 2)
431 state = video->brightness->count - state;
432 level = video->brightness->levels[state -1];
433 return acpi_video_device_lcd_set_level(video, level);
436 static struct thermal_cooling_device_ops video_cooling_ops = {
437 .get_max_state = video_get_max_state,
438 .get_cur_state = video_get_cur_state,
439 .set_cur_state = video_set_cur_state,
442 /* --------------------------------------------------------------------------
444 -------------------------------------------------------------------------- */
449 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
453 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
459 acpi_video_device_get_state(struct acpi_video_device *device,
460 unsigned long long *state)
464 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
470 acpi_video_device_set_state(struct acpi_video_device *device, int state)
473 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
474 struct acpi_object_list args = { 1, &arg0 };
475 unsigned long long ret;
478 arg0.integer.value = state;
479 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
485 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
486 union acpi_object **levels)
489 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
490 union acpi_object *obj;
495 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
496 if (!ACPI_SUCCESS(status))
498 obj = (union acpi_object *)buffer.pointer;
499 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
500 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
510 kfree(buffer.pointer);
516 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
519 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
520 struct acpi_object_list args = { 1, &arg0 };
523 arg0.integer.value = level;
525 status = acpi_evaluate_object(device->dev->handle, "_BCM",
527 if (ACPI_FAILURE(status)) {
528 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
532 device->brightness->curr = level;
533 for (state = 2; state < device->brightness->count; state++)
534 if (level == device->brightness->levels[state]) {
535 if (device->backlight)
536 device->backlight->props.brightness = state - 2;
540 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
545 * For some buggy _BQC methods, we need to add a constant value to
546 * the _BQC return value to get the actual current brightness level
549 static int bqc_offset_aml_bug_workaround;
550 static int __init video_set_bqc_offset(const struct dmi_system_id *d)
552 bqc_offset_aml_bug_workaround = 9;
556 static struct dmi_system_id video_dmi_table[] __initdata = {
558 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
561 .callback = video_set_bqc_offset,
562 .ident = "Acer Aspire 5720",
564 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
565 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
569 .callback = video_set_bqc_offset,
570 .ident = "Acer Aspire 5710Z",
572 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
573 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
577 .callback = video_set_bqc_offset,
578 .ident = "eMachines E510",
580 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
581 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
585 .callback = video_set_bqc_offset,
586 .ident = "Acer Aspire 5315",
588 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
589 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
593 .callback = video_set_bqc_offset,
594 .ident = "Acer Aspire 7720",
596 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
597 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
604 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
605 unsigned long long *level)
607 acpi_status status = AE_OK;
609 if (device->cap._BQC || device->cap._BCQ) {
610 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
612 status = acpi_evaluate_integer(device->dev->handle, buf,
614 if (ACPI_SUCCESS(status)) {
615 if (device->brightness->flags._BQC_use_index) {
616 if (device->brightness->flags._BCL_reversed)
617 *level = device->brightness->count
619 *level = device->brightness->levels[*level + 2];
622 *level += bqc_offset_aml_bug_workaround;
623 device->brightness->curr = *level;
627 * should we return an error or ignore this failure?
628 * dev->brightness->curr is a cached value which stores
629 * the correct current backlight level in most cases.
630 * ACPI video backlight still works w/ buggy _BQC.
631 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
633 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
634 device->cap._BQC = device->cap._BCQ = 0;
638 *level = device->brightness->curr;
643 acpi_video_device_EDID(struct acpi_video_device *device,
644 union acpi_object **edid, ssize_t length)
647 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
648 union acpi_object *obj;
649 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
650 struct acpi_object_list args = { 1, &arg0 };
658 arg0.integer.value = 1;
659 else if (length == 256)
660 arg0.integer.value = 2;
664 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
665 if (ACPI_FAILURE(status))
668 obj = buffer.pointer;
670 if (obj && obj->type == ACPI_TYPE_BUFFER)
673 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
684 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
687 unsigned long long tmp;
688 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
689 struct acpi_object_list args = { 1, &arg0 };
692 arg0.integer.value = option;
694 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
695 if (ACPI_SUCCESS(status))
696 status = tmp ? (-EINVAL) : (AE_OK);
702 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
706 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
712 acpi_video_bus_POST_options(struct acpi_video_bus *video,
713 unsigned long long *options)
717 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
725 * video : video bus device pointer
727 * 0. The system BIOS should NOT automatically switch(toggle)
728 * the active display output.
729 * 1. The system BIOS should automatically switch (toggle) the
730 * active display output. No switch event.
731 * 2. The _DGS value should be locked.
732 * 3. The system BIOS should not automatically switch (toggle) the
733 * active display output, but instead generate the display switch
736 * 0. The system BIOS should automatically control the brightness level
737 * of the LCD when the power changes from AC to DC
738 * 1. The system BIOS should NOT automatically control the brightness
739 * level of the LCD when the power changes from AC to DC.
745 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
747 acpi_integer status = 0;
748 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
749 struct acpi_object_list args = { 1, &arg0 };
752 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
756 arg0.integer.value = (lcd_flag << 2) | bios_flag;
757 video->dos_setting = arg0.integer.value;
758 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
765 * Simple comparison function used to sort backlight levels.
769 acpi_video_cmp_level(const void *a, const void *b)
771 return *(int *)a - *(int *)b;
776 * device : video output device (LCD, CRT, ..)
779 * Maximum brightness level
781 * Allocate and initialize device->brightness.
785 acpi_video_init_brightness(struct acpi_video_device *device)
787 union acpi_object *obj = NULL;
788 int i, max_level = 0, count = 0, level_ac_battery = 0;
789 unsigned long long level, level_old;
790 union acpi_object *o;
791 struct acpi_video_device_brightness *br = NULL;
792 int result = -EINVAL;
794 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
795 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
796 "LCD brightness level\n"));
800 if (obj->package.count < 2)
803 br = kzalloc(sizeof(*br), GFP_KERNEL);
805 printk(KERN_ERR "can't allocate memory\n");
810 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
817 for (i = 0; i < obj->package.count; i++) {
818 o = (union acpi_object *)&obj->package.elements[i];
819 if (o->type != ACPI_TYPE_INTEGER) {
820 printk(KERN_ERR PREFIX "Invalid data\n");
823 br->levels[count] = (u32) o->integer.value;
825 if (br->levels[count] > max_level)
826 max_level = br->levels[count];
831 * some buggy BIOS don't export the levels
832 * when machine is on AC/Battery in _BCL package.
833 * In this case, the first two elements in _BCL packages
834 * are also supported brightness levels that OS should take care of.
836 for (i = 2; i < count; i++) {
837 if (br->levels[i] == br->levels[0])
839 if (br->levels[i] == br->levels[1])
843 if (level_ac_battery < 2) {
844 level_ac_battery = 2 - level_ac_battery;
845 br->flags._BCL_no_ac_battery_levels = 1;
846 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
847 br->levels[i] = br->levels[i - level_ac_battery];
848 count += level_ac_battery;
849 } else if (level_ac_battery > 2)
850 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
852 /* Check if the _BCL package is in a reversed order */
853 if (max_level == br->levels[2]) {
854 br->flags._BCL_reversed = 1;
855 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
856 acpi_video_cmp_level, NULL);
857 } else if (max_level != br->levels[count - 1])
859 "Found unordered _BCL package\n"));
862 device->brightness = br;
864 /* Check the input/output of _BQC/_BCL/_BCM */
865 if ((max_level < 100) && (max_level <= (count - 2)))
866 br->flags._BCL_use_index = 1;
869 * _BCM is always consistent with _BCL,
870 * at least for all the laptops we have ever seen.
872 br->flags._BCM_use_index = br->flags._BCL_use_index;
874 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
875 br->curr = level_old = max_level;
877 if (!device->cap._BQC)
880 result = acpi_video_device_lcd_get_level_current(device, &level_old);
882 goto out_free_levels;
885 * Set the level to maximum and check if _BQC uses indexed value
887 result = acpi_video_device_lcd_set_level(device, max_level);
889 goto out_free_levels;
891 result = acpi_video_device_lcd_get_level_current(device, &level);
893 goto out_free_levels;
895 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
897 if (!br->flags._BQC_use_index)
900 if (br->flags._BCL_reversed)
901 level_old = (br->count - 1) - level_old;
902 level_old = br->levels[level_old];
905 result = acpi_video_device_lcd_set_level(device, level_old);
907 goto out_free_levels;
909 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
910 "found %d brightness levels\n", count - 2));
919 device->brightness = NULL;
926 * device : video output device (LCD, CRT, ..)
931 * Find out all required AML methods defined under the output
935 static void acpi_video_device_find_cap(struct acpi_video_device *device)
937 acpi_handle h_dummy1;
940 memset(&device->cap, 0, sizeof(device->cap));
942 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
943 device->cap._ADR = 1;
945 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
946 device->cap._BCL = 1;
948 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
949 device->cap._BCM = 1;
951 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
952 device->cap._BQC = 1;
953 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
955 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
956 device->cap._BCQ = 1;
959 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
960 device->cap._DDC = 1;
962 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
963 device->cap._DCS = 1;
965 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
966 device->cap._DGS = 1;
968 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
969 device->cap._DSS = 1;
972 if (acpi_video_backlight_support()) {
974 static int count = 0;
977 result = acpi_video_init_brightness(device);
980 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
984 sprintf(name, "acpi_video%d", count++);
985 device->backlight = backlight_device_register(name,
986 NULL, device, &acpi_backlight_ops);
987 device->backlight->props.max_brightness = device->brightness->count-3;
990 result = sysfs_create_link(&device->backlight->dev.kobj,
991 &device->dev->dev.kobj, "device");
993 printk(KERN_ERR PREFIX "Create sysfs link\n");
995 device->cdev = thermal_cooling_device_register("LCD",
996 device->dev, &video_cooling_ops);
997 if (IS_ERR(device->cdev))
1000 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
1002 result = sysfs_create_link(&device->dev->dev.kobj,
1003 &device->cdev->device.kobj,
1006 printk(KERN_ERR PREFIX "Create sysfs link\n");
1007 result = sysfs_create_link(&device->cdev->device.kobj,
1008 &device->dev->dev.kobj, "device");
1010 printk(KERN_ERR PREFIX "Create sysfs link\n");
1014 if (acpi_video_display_switch_support()) {
1016 if (device->cap._DCS && device->cap._DSS) {
1019 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
1022 sprintf(name, "acpi_video%d", count++);
1023 device->output_dev = video_output_register(name,
1024 NULL, device, &acpi_output_properties);
1032 * device : video output device (VGA)
1037 * Find out all required AML methods defined under the video bus device.
1040 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1042 acpi_handle h_dummy1;
1044 memset(&video->cap, 0, sizeof(video->cap));
1045 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
1046 video->cap._DOS = 1;
1048 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
1049 video->cap._DOD = 1;
1051 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
1052 video->cap._ROM = 1;
1054 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
1055 video->cap._GPD = 1;
1057 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
1058 video->cap._SPD = 1;
1060 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
1061 video->cap._VPO = 1;
1066 * Check whether the video bus device has required AML method to
1067 * support the desired features
1070 static int acpi_video_bus_check(struct acpi_video_bus *video)
1072 acpi_status status = -ENOENT;
1073 struct pci_dev *dev;
1078 dev = acpi_get_pci_dev(video->device->handle);
1083 /* Since there is no HID, CID and so on for VGA driver, we have
1084 * to check well known required nodes.
1087 /* Does this device support video switching? */
1088 if (video->cap._DOS) {
1089 video->flags.multihead = 1;
1093 /* Does this device support retrieving a video ROM? */
1094 if (video->cap._ROM) {
1095 video->flags.rom = 1;
1099 /* Does this device support configuring which video device to POST? */
1100 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1101 video->flags.post = 1;
1108 /* --------------------------------------------------------------------------
1109 FS Interface (/proc)
1110 -------------------------------------------------------------------------- */
1112 static struct proc_dir_entry *acpi_video_dir;
1116 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1118 struct acpi_video_device *dev = seq->private;
1124 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1125 seq_printf(seq, "type: ");
1127 seq_printf(seq, "CRT\n");
1128 else if (dev->flags.lcd)
1129 seq_printf(seq, "LCD\n");
1130 else if (dev->flags.tvout)
1131 seq_printf(seq, "TVOUT\n");
1132 else if (dev->flags.dvi)
1133 seq_printf(seq, "DVI\n");
1135 seq_printf(seq, "UNKNOWN\n");
1137 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1144 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1146 return single_open(file, acpi_video_device_info_seq_show,
1150 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1153 struct acpi_video_device *dev = seq->private;
1154 unsigned long long state;
1160 status = acpi_video_device_get_state(dev, &state);
1161 seq_printf(seq, "state: ");
1162 if (ACPI_SUCCESS(status))
1163 seq_printf(seq, "0x%02llx\n", state);
1165 seq_printf(seq, "<not supported>\n");
1167 status = acpi_video_device_query(dev, &state);
1168 seq_printf(seq, "query: ");
1169 if (ACPI_SUCCESS(status))
1170 seq_printf(seq, "0x%02llx\n", state);
1172 seq_printf(seq, "<not supported>\n");
1179 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1181 return single_open(file, acpi_video_device_state_seq_show,
1186 acpi_video_device_write_state(struct file *file,
1187 const char __user * buffer,
1188 size_t count, loff_t * data)
1191 struct seq_file *m = file->private_data;
1192 struct acpi_video_device *dev = m->private;
1193 char str[12] = { 0 };
1197 if (!dev || count + 1 > sizeof str)
1200 if (copy_from_user(str, buffer, count))
1204 state = simple_strtoul(str, NULL, 0);
1205 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1207 status = acpi_video_device_set_state(dev, state);
1216 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1218 struct acpi_video_device *dev = seq->private;
1222 if (!dev || !dev->brightness) {
1223 seq_printf(seq, "<not supported>\n");
1227 seq_printf(seq, "levels: ");
1228 for (i = 2; i < dev->brightness->count; i++)
1229 seq_printf(seq, " %d", dev->brightness->levels[i]);
1230 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1236 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1238 return single_open(file, acpi_video_device_brightness_seq_show,
1243 acpi_video_device_write_brightness(struct file *file,
1244 const char __user * buffer,
1245 size_t count, loff_t * data)
1247 struct seq_file *m = file->private_data;
1248 struct acpi_video_device *dev = m->private;
1249 char str[5] = { 0 };
1250 unsigned int level = 0;
1254 if (!dev || !dev->brightness || count + 1 > sizeof str)
1257 if (copy_from_user(str, buffer, count))
1261 level = simple_strtoul(str, NULL, 0);
1266 /* validate through the list of available levels */
1267 for (i = 2; i < dev->brightness->count; i++)
1268 if (level == dev->brightness->levels[i]) {
1269 if (!acpi_video_device_lcd_set_level(dev, level))
1277 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1279 struct acpi_video_device *dev = seq->private;
1282 union acpi_object *edid = NULL;
1288 status = acpi_video_device_EDID(dev, &edid, 128);
1289 if (ACPI_FAILURE(status)) {
1290 status = acpi_video_device_EDID(dev, &edid, 256);
1293 if (ACPI_FAILURE(status)) {
1297 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1298 for (i = 0; i < edid->buffer.length; i++)
1299 seq_putc(seq, edid->buffer.pointer[i]);
1304 seq_printf(seq, "<not supported>\n");
1312 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1314 return single_open(file, acpi_video_device_EDID_seq_show,
1318 static int acpi_video_device_add_fs(struct acpi_device *device)
1320 struct proc_dir_entry *entry, *device_dir;
1321 struct acpi_video_device *vid_dev;
1323 vid_dev = acpi_driver_data(device);
1327 device_dir = proc_mkdir(acpi_device_bid(device),
1328 vid_dev->video->dir);
1333 entry = proc_create_data("info", S_IRUGO, device_dir,
1334 &acpi_video_device_info_fops, acpi_driver_data(device));
1336 goto err_remove_dir;
1339 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1341 &acpi_video_device_state_fops,
1342 acpi_driver_data(device));
1344 goto err_remove_info;
1346 /* 'brightness' [R/W] */
1347 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1349 &acpi_video_device_brightness_fops,
1350 acpi_driver_data(device));
1352 goto err_remove_state;
1355 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1356 &acpi_video_device_EDID_fops,
1357 acpi_driver_data(device));
1359 goto err_remove_brightness;
1361 acpi_device_dir(device) = device_dir;
1365 err_remove_brightness:
1366 remove_proc_entry("brightness", device_dir);
1368 remove_proc_entry("state", device_dir);
1370 remove_proc_entry("info", device_dir);
1372 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1376 static int acpi_video_device_remove_fs(struct acpi_device *device)
1378 struct acpi_video_device *vid_dev;
1379 struct proc_dir_entry *device_dir;
1381 vid_dev = acpi_driver_data(device);
1382 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1385 device_dir = acpi_device_dir(device);
1387 remove_proc_entry("info", device_dir);
1388 remove_proc_entry("state", device_dir);
1389 remove_proc_entry("brightness", device_dir);
1390 remove_proc_entry("EDID", device_dir);
1391 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1392 acpi_device_dir(device) = NULL;
1399 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1401 struct acpi_video_bus *video = seq->private;
1407 seq_printf(seq, "Switching heads: %s\n",
1408 video->flags.multihead ? "yes" : "no");
1409 seq_printf(seq, "Video ROM: %s\n",
1410 video->flags.rom ? "yes" : "no");
1411 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1412 video->flags.post ? "yes" : "no");
1418 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1420 return single_open(file, acpi_video_bus_info_seq_show,
1424 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1426 struct acpi_video_bus *video = seq->private;
1432 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1433 seq_printf(seq, "<TODO>\n");
1439 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1441 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1444 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1446 struct acpi_video_bus *video = seq->private;
1447 unsigned long long options;
1454 status = acpi_video_bus_POST_options(video, &options);
1455 if (ACPI_SUCCESS(status)) {
1456 if (!(options & 1)) {
1457 printk(KERN_WARNING PREFIX
1458 "The motherboard VGA device is not listed as a possible POST device.\n");
1459 printk(KERN_WARNING PREFIX
1460 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1462 printk(KERN_WARNING "%llx\n", options);
1463 seq_printf(seq, "can POST: <integrated video>");
1465 seq_printf(seq, " <PCI video>");
1467 seq_printf(seq, " <AGP video>");
1468 seq_putc(seq, '\n');
1470 seq_printf(seq, "<not supported>\n");
1476 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1478 return single_open(file, acpi_video_bus_POST_info_seq_show,
1482 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1484 struct acpi_video_bus *video = seq->private;
1486 unsigned long long id;
1492 status = acpi_video_bus_get_POST(video, &id);
1493 if (!ACPI_SUCCESS(status)) {
1494 seq_printf(seq, "<not supported>\n");
1497 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1503 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1505 struct acpi_video_bus *video = seq->private;
1508 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1513 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1515 return single_open(file, acpi_video_bus_POST_seq_show,
1519 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1521 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1525 acpi_video_bus_write_POST(struct file *file,
1526 const char __user * buffer,
1527 size_t count, loff_t * data)
1530 struct seq_file *m = file->private_data;
1531 struct acpi_video_bus *video = m->private;
1532 char str[12] = { 0 };
1533 unsigned long long opt, options;
1536 if (!video || count + 1 > sizeof str)
1539 status = acpi_video_bus_POST_options(video, &options);
1540 if (!ACPI_SUCCESS(status))
1543 if (copy_from_user(str, buffer, count))
1547 opt = strtoul(str, NULL, 0);
1551 /* just in case an OEM 'forgot' the motherboard... */
1554 if (options & (1ul << opt)) {
1555 status = acpi_video_bus_set_POST(video, opt);
1556 if (!ACPI_SUCCESS(status))
1565 acpi_video_bus_write_DOS(struct file *file,
1566 const char __user * buffer,
1567 size_t count, loff_t * data)
1570 struct seq_file *m = file->private_data;
1571 struct acpi_video_bus *video = m->private;
1572 char str[12] = { 0 };
1576 if (!video || count + 1 > sizeof str)
1579 if (copy_from_user(str, buffer, count))
1583 opt = strtoul(str, NULL, 0);
1587 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1589 if (!ACPI_SUCCESS(status))
1595 static int acpi_video_bus_add_fs(struct acpi_device *device)
1597 struct acpi_video_bus *video = acpi_driver_data(device);
1598 struct proc_dir_entry *device_dir;
1599 struct proc_dir_entry *entry;
1601 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1606 entry = proc_create_data("info", S_IRUGO, device_dir,
1607 &acpi_video_bus_info_fops,
1608 acpi_driver_data(device));
1610 goto err_remove_dir;
1613 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1614 &acpi_video_bus_ROM_fops,
1615 acpi_driver_data(device));
1617 goto err_remove_info;
1619 /* 'POST_info' [R] */
1620 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1621 &acpi_video_bus_POST_info_fops,
1622 acpi_driver_data(device));
1624 goto err_remove_rom;
1627 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1629 &acpi_video_bus_POST_fops,
1630 acpi_driver_data(device));
1632 goto err_remove_post_info;
1635 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1637 &acpi_video_bus_DOS_fops,
1638 acpi_driver_data(device));
1640 goto err_remove_post;
1642 video->dir = acpi_device_dir(device) = device_dir;
1646 remove_proc_entry("POST", device_dir);
1647 err_remove_post_info:
1648 remove_proc_entry("POST_info", device_dir);
1650 remove_proc_entry("ROM", device_dir);
1652 remove_proc_entry("info", device_dir);
1654 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1658 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1660 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1663 remove_proc_entry("info", device_dir);
1664 remove_proc_entry("ROM", device_dir);
1665 remove_proc_entry("POST_info", device_dir);
1666 remove_proc_entry("POST", device_dir);
1667 remove_proc_entry("DOS", device_dir);
1668 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1669 acpi_device_dir(device) = NULL;
1675 /* --------------------------------------------------------------------------
1677 -------------------------------------------------------------------------- */
1679 /* device interface */
1680 static struct acpi_video_device_attrib*
1681 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1683 struct acpi_video_enumerated_device *ids;
1686 for (i = 0; i < video->attached_count; i++) {
1687 ids = &video->attached_array[i];
1688 if ((ids->value.int_val & 0xffff) == device_id)
1689 return &ids->value.attrib;
1696 acpi_video_bus_get_one_device(struct acpi_device *device,
1697 struct acpi_video_bus *video)
1699 unsigned long long device_id;
1701 struct acpi_video_device *data;
1702 struct acpi_video_device_attrib* attribute;
1704 if (!device || !video)
1708 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1709 if (ACPI_SUCCESS(status)) {
1711 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1715 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1716 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1717 device->driver_data = data;
1719 data->device_id = device_id;
1720 data->video = video;
1723 attribute = acpi_video_get_device_attr(video, device_id);
1725 if((attribute != NULL) && attribute->device_id_scheme) {
1726 switch (attribute->display_type) {
1727 case ACPI_VIDEO_DISPLAY_CRT:
1728 data->flags.crt = 1;
1730 case ACPI_VIDEO_DISPLAY_TV:
1731 data->flags.tvout = 1;
1733 case ACPI_VIDEO_DISPLAY_DVI:
1734 data->flags.dvi = 1;
1736 case ACPI_VIDEO_DISPLAY_LCD:
1737 data->flags.lcd = 1;
1740 data->flags.unknown = 1;
1743 if(attribute->bios_can_detect)
1744 data->flags.bios = 1;
1746 data->flags.unknown = 1;
1748 acpi_video_device_bind(video, data);
1749 acpi_video_device_find_cap(data);
1751 status = acpi_install_notify_handler(device->handle,
1753 acpi_video_device_notify,
1755 if (ACPI_FAILURE(status)) {
1756 printk(KERN_ERR PREFIX
1757 "Error installing notify handler\n");
1758 if(data->brightness)
1759 kfree(data->brightness->levels);
1760 kfree(data->brightness);
1765 mutex_lock(&video->device_list_lock);
1766 list_add_tail(&data->entry, &video->video_device_list);
1767 mutex_unlock(&video->device_list_lock);
1769 acpi_video_device_add_fs(device);
1779 * video : video bus device
1784 * Enumerate the video device list of the video bus,
1785 * bind the ids with the corresponding video devices
1786 * under the video bus.
1789 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1791 struct acpi_video_device *dev;
1793 mutex_lock(&video->device_list_lock);
1795 list_for_each_entry(dev, &video->video_device_list, entry)
1796 acpi_video_device_bind(video, dev);
1798 mutex_unlock(&video->device_list_lock);
1803 * video : video bus device
1804 * device : video output device under the video
1810 * Bind the ids with the corresponding video devices
1811 * under the video bus.
1815 acpi_video_device_bind(struct acpi_video_bus *video,
1816 struct acpi_video_device *device)
1818 struct acpi_video_enumerated_device *ids;
1821 for (i = 0; i < video->attached_count; i++) {
1822 ids = &video->attached_array[i];
1823 if (device->device_id == (ids->value.int_val & 0xffff)) {
1824 ids->bind_info = device;
1825 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1832 * video : video bus device
1837 * Call _DOD to enumerate all devices attached to display adapter
1841 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1846 struct acpi_video_enumerated_device *active_list;
1847 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1848 union acpi_object *dod = NULL;
1849 union acpi_object *obj;
1851 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1852 if (!ACPI_SUCCESS(status)) {
1853 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1857 dod = buffer.pointer;
1858 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1859 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1864 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1865 dod->package.count));
1867 active_list = kcalloc(1 + dod->package.count,
1868 sizeof(struct acpi_video_enumerated_device),
1876 for (i = 0; i < dod->package.count; i++) {
1877 obj = &dod->package.elements[i];
1879 if (obj->type != ACPI_TYPE_INTEGER) {
1880 printk(KERN_ERR PREFIX
1881 "Invalid _DOD data in element %d\n", i);
1885 active_list[count].value.int_val = obj->integer.value;
1886 active_list[count].bind_info = NULL;
1887 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1888 (int)obj->integer.value));
1892 kfree(video->attached_array);
1894 video->attached_array = active_list;
1895 video->attached_count = count;
1898 kfree(buffer.pointer);
1903 acpi_video_get_next_level(struct acpi_video_device *device,
1904 u32 level_current, u32 event)
1906 int min, max, min_above, max_below, i, l, delta = 255;
1907 max = max_below = 0;
1908 min = min_above = 255;
1909 /* Find closest level to level_current */
1910 for (i = 2; i < device->brightness->count; i++) {
1911 l = device->brightness->levels[i];
1912 if (abs(l - level_current) < abs(delta)) {
1913 delta = l - level_current;
1918 /* Ajust level_current to closest available level */
1919 level_current += delta;
1920 for (i = 2; i < device->brightness->count; i++) {
1921 l = device->brightness->levels[i];
1926 if (l < min_above && l > level_current)
1928 if (l > max_below && l < level_current)
1933 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1934 return (level_current < max) ? min_above : min;
1935 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1936 return (level_current < max) ? min_above : max;
1937 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1938 return (level_current > min) ? max_below : min;
1939 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1940 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1943 return level_current;
1948 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1950 unsigned long long level_current, level_next;
1951 int result = -EINVAL;
1953 if (!device->brightness)
1956 result = acpi_video_device_lcd_get_level_current(device,
1961 level_next = acpi_video_get_next_level(device, level_current, event);
1963 result = acpi_video_device_lcd_set_level(device, level_next);
1967 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1973 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1974 struct acpi_device *device)
1977 struct acpi_device *dev;
1979 acpi_video_device_enumerate(video);
1981 list_for_each_entry(dev, &device->children, node) {
1983 status = acpi_video_bus_get_one_device(dev, video);
1984 if (ACPI_FAILURE(status)) {
1985 printk(KERN_WARNING PREFIX
1986 "Cant attach device");
1993 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1996 struct acpi_video_bus *video;
1999 if (!device || !device->video)
2002 video = device->video;
2004 acpi_video_device_remove_fs(device->dev);
2006 status = acpi_remove_notify_handler(device->dev->handle,
2008 acpi_video_device_notify);
2009 if (device->backlight) {
2010 sysfs_remove_link(&device->backlight->dev.kobj, "device");
2011 backlight_device_unregister(device->backlight);
2012 device->backlight = NULL;
2015 sysfs_remove_link(&device->dev->dev.kobj,
2017 sysfs_remove_link(&device->cdev->device.kobj,
2019 thermal_cooling_device_unregister(device->cdev);
2020 device->cdev = NULL;
2022 video_output_unregister(device->output_dev);
2027 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
2030 struct acpi_video_device *dev, *next;
2032 mutex_lock(&video->device_list_lock);
2034 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
2036 status = acpi_video_bus_put_one_device(dev);
2037 if (ACPI_FAILURE(status))
2038 printk(KERN_WARNING PREFIX
2039 "hhuuhhuu bug in acpi video driver.\n");
2041 if (dev->brightness) {
2042 kfree(dev->brightness->levels);
2043 kfree(dev->brightness);
2045 list_del(&dev->entry);
2049 mutex_unlock(&video->device_list_lock);
2054 /* acpi_video interface */
2056 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
2058 return acpi_video_bus_DOS(video, 0, 0);
2061 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
2063 return acpi_video_bus_DOS(video, 0, 1);
2066 static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
2068 struct acpi_video_bus *video = acpi_driver_data(device);
2069 struct input_dev *input;
2075 input = video->input;
2078 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2079 * most likely via hotkey. */
2080 acpi_bus_generate_proc_event(device, event, 0);
2081 keycode = KEY_SWITCHVIDEOMODE;
2084 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2086 acpi_video_device_enumerate(video);
2087 acpi_video_device_rebind(video);
2088 acpi_bus_generate_proc_event(device, event, 0);
2089 keycode = KEY_SWITCHVIDEOMODE;
2092 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2093 acpi_bus_generate_proc_event(device, event, 0);
2094 keycode = KEY_SWITCHVIDEOMODE;
2096 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2097 acpi_bus_generate_proc_event(device, event, 0);
2098 keycode = KEY_VIDEO_NEXT;
2100 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2101 acpi_bus_generate_proc_event(device, event, 0);
2102 keycode = KEY_VIDEO_PREV;
2106 keycode = KEY_UNKNOWN;
2107 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2108 "Unsupported event [0x%x]\n", event));
2112 acpi_notifier_call_chain(device, event, 0);
2113 input_report_key(input, keycode, 1);
2115 input_report_key(input, keycode, 0);
2121 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2123 struct acpi_video_device *video_device = data;
2124 struct acpi_device *device = NULL;
2125 struct acpi_video_bus *bus;
2126 struct input_dev *input;
2132 device = video_device->dev;
2133 bus = video_device->video;
2137 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
2138 if (brightness_switch_enabled)
2139 acpi_video_switch_brightness(video_device, event);
2140 acpi_bus_generate_proc_event(device, event, 0);
2141 keycode = KEY_BRIGHTNESS_CYCLE;
2143 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2144 if (brightness_switch_enabled)
2145 acpi_video_switch_brightness(video_device, event);
2146 acpi_bus_generate_proc_event(device, event, 0);
2147 keycode = KEY_BRIGHTNESSUP;
2149 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2150 if (brightness_switch_enabled)
2151 acpi_video_switch_brightness(video_device, event);
2152 acpi_bus_generate_proc_event(device, event, 0);
2153 keycode = KEY_BRIGHTNESSDOWN;
2155 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2156 if (brightness_switch_enabled)
2157 acpi_video_switch_brightness(video_device, event);
2158 acpi_bus_generate_proc_event(device, event, 0);
2159 keycode = KEY_BRIGHTNESS_ZERO;
2161 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2162 if (brightness_switch_enabled)
2163 acpi_video_switch_brightness(video_device, event);
2164 acpi_bus_generate_proc_event(device, event, 0);
2165 keycode = KEY_DISPLAY_OFF;
2168 keycode = KEY_UNKNOWN;
2169 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2170 "Unsupported event [0x%x]\n", event));
2174 acpi_notifier_call_chain(device, event, 0);
2175 input_report_key(input, keycode, 1);
2177 input_report_key(input, keycode, 0);
2183 static int instance;
2184 static int acpi_video_resume(struct acpi_device *device)
2186 struct acpi_video_bus *video;
2187 struct acpi_video_device *video_device;
2190 if (!device || !acpi_driver_data(device))
2193 video = acpi_driver_data(device);
2195 for (i = 0; i < video->attached_count; i++) {
2196 video_device = video->attached_array[i].bind_info;
2197 if (video_device && video_device->backlight)
2198 acpi_video_set_brightness(video_device->backlight);
2203 static int acpi_video_bus_add(struct acpi_device *device)
2205 struct acpi_video_bus *video;
2206 struct input_dev *input;
2209 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2213 /* a hack to fix the duplicate name "VID" problem on T61 */
2214 if (!strcmp(device->pnp.bus_id, "VID")) {
2216 device->pnp.bus_id[3] = '0' + instance;
2219 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2220 if (!strcmp(device->pnp.bus_id, "VGA")) {
2222 device->pnp.bus_id[3] = '0' + instance;
2226 video->device = device;
2227 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2228 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2229 device->driver_data = video;
2231 acpi_video_bus_find_cap(video);
2232 error = acpi_video_bus_check(video);
2234 goto err_free_video;
2236 error = acpi_video_bus_add_fs(device);
2238 goto err_free_video;
2240 mutex_init(&video->device_list_lock);
2241 INIT_LIST_HEAD(&video->video_device_list);
2243 acpi_video_bus_get_devices(video, device);
2244 acpi_video_bus_start_devices(video);
2246 video->input = input = input_allocate_device();
2249 goto err_stop_video;
2252 snprintf(video->phys, sizeof(video->phys),
2253 "%s/video/input0", acpi_device_hid(video->device));
2255 input->name = acpi_device_name(video->device);
2256 input->phys = video->phys;
2257 input->id.bustype = BUS_HOST;
2258 input->id.product = 0x06;
2259 input->dev.parent = &device->dev;
2260 input->evbit[0] = BIT(EV_KEY);
2261 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2262 set_bit(KEY_VIDEO_NEXT, input->keybit);
2263 set_bit(KEY_VIDEO_PREV, input->keybit);
2264 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2265 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2266 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2267 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2268 set_bit(KEY_DISPLAY_OFF, input->keybit);
2269 set_bit(KEY_UNKNOWN, input->keybit);
2271 error = input_register_device(input);
2273 goto err_free_input_dev;
2275 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2276 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2277 video->flags.multihead ? "yes" : "no",
2278 video->flags.rom ? "yes" : "no",
2279 video->flags.post ? "yes" : "no");
2284 input_free_device(input);
2286 acpi_video_bus_stop_devices(video);
2287 acpi_video_bus_put_devices(video);
2288 kfree(video->attached_array);
2289 acpi_video_bus_remove_fs(device);
2292 device->driver_data = NULL;
2297 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2299 struct acpi_video_bus *video = NULL;
2302 if (!device || !acpi_driver_data(device))
2305 video = acpi_driver_data(device);
2307 acpi_video_bus_stop_devices(video);
2308 acpi_video_bus_put_devices(video);
2309 acpi_video_bus_remove_fs(device);
2311 input_unregister_device(video->input);
2312 kfree(video->attached_array);
2318 static int __init intel_opregion_present(void)
2320 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2321 struct pci_dev *dev = NULL;
2324 for_each_pci_dev(dev) {
2325 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2327 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2329 pci_read_config_dword(dev, 0xfc, &address);
2338 int acpi_video_register(void)
2341 if (register_count) {
2343 * if the function of acpi_video_register is already called,
2344 * don't register the acpi_vide_bus again and return no error.
2349 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2350 if (!acpi_video_dir)
2353 result = acpi_bus_register_driver(&acpi_video_bus);
2355 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2360 * When the acpi_video_bus is loaded successfully, increase
2361 * the counter reference.
2367 EXPORT_SYMBOL(acpi_video_register);
2369 void acpi_video_unregister(void)
2371 if (!register_count) {
2373 * If the acpi video bus is already unloaded, don't
2374 * unload it again and return directly.
2378 acpi_bus_unregister_driver(&acpi_video_bus);
2380 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2386 EXPORT_SYMBOL(acpi_video_unregister);
2389 * This is kind of nasty. Hardware using Intel chipsets may require
2390 * the video opregion code to be run first in order to initialise
2391 * state before any ACPI video calls are made. To handle this we defer
2392 * registration of the video class until the opregion code has run.
2395 static int __init acpi_video_init(void)
2397 dmi_check_system(video_dmi_table);
2399 if (intel_opregion_present())
2402 return acpi_video_register();
2405 static void __exit acpi_video_exit(void)
2407 acpi_video_unregister();
2412 module_init(acpi_video_init);
2413 module_exit(acpi_video_exit);