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path: root/drivers/acpi/video.c
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Diffstat (limited to 'drivers/acpi/video.c')
-rw-r--r--drivers/acpi/video.c100
1 files changed, 61 insertions, 39 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 56666a98247..eb5141f9ef8 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -3,6 +3,7 @@
*
* Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
* Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
+ * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
@@ -47,11 +48,11 @@
#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
-#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x82
-#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x83
-#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x84
-#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x85
-#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x86
+#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
+#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
+#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
+#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
+#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
#define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
#define ACPI_VIDEO_HEAD_END (~0u)
@@ -386,7 +387,7 @@ acpi_video_device_EDID(struct acpi_video_device *device,
if (ACPI_FAILURE(status))
return -ENODEV;
- obj = (union acpi_object *)buffer.pointer;
+ obj = buffer.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER)
*edid = obj;
@@ -654,8 +655,7 @@ static struct proc_dir_entry *acpi_video_dir;
static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_device *dev =
- (struct acpi_video_device *)seq->private;
+ struct acpi_video_device *dev = seq->private;
if (!dev)
@@ -688,8 +688,7 @@ acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
{
int status;
- struct acpi_video_device *dev =
- (struct acpi_video_device *)seq->private;
+ struct acpi_video_device *dev = seq->private;
unsigned long state;
@@ -727,8 +726,8 @@ acpi_video_device_write_state(struct file *file,
size_t count, loff_t * data)
{
int status;
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
+ struct seq_file *m = file->private_data;
+ struct acpi_video_device *dev = m->private;
char str[12] = { 0 };
u32 state = 0;
@@ -754,8 +753,7 @@ acpi_video_device_write_state(struct file *file,
static int
acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_device *dev =
- (struct acpi_video_device *)seq->private;
+ struct acpi_video_device *dev = seq->private;
int i;
@@ -784,8 +782,8 @@ acpi_video_device_write_brightness(struct file *file,
const char __user * buffer,
size_t count, loff_t * data)
{
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
+ struct seq_file *m = file->private_data;
+ struct acpi_video_device *dev = m->private;
char str[4] = { 0 };
unsigned int level = 0;
int i;
@@ -817,8 +815,7 @@ acpi_video_device_write_brightness(struct file *file,
static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_device *dev =
- (struct acpi_video_device *)seq->private;
+ struct acpi_video_device *dev = seq->private;
int status;
int i;
union acpi_object *edid = NULL;
@@ -866,7 +863,7 @@ static int acpi_video_device_add_fs(struct acpi_device *device)
if (!device)
return -ENODEV;
- vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
+ vid_dev = acpi_driver_data(device);
if (!vid_dev)
return -ENODEV;
@@ -931,7 +928,7 @@ static int acpi_video_device_remove_fs(struct acpi_device *device)
{
struct acpi_video_device *vid_dev;
- vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
+ vid_dev = acpi_driver_data(device);
if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
return -ENODEV;
@@ -950,7 +947,7 @@ static int acpi_video_device_remove_fs(struct acpi_device *device)
/* video bus */
static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
if (!video)
@@ -975,7 +972,7 @@ static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
if (!video)
@@ -995,7 +992,7 @@ static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
unsigned long options;
int status;
@@ -1033,7 +1030,7 @@ acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
int status;
unsigned long id;
@@ -1054,7 +1051,7 @@ static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
@@ -1079,8 +1076,8 @@ acpi_video_bus_write_POST(struct file *file,
size_t count, loff_t * data)
{
int status;
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
+ struct seq_file *m = file->private_data;
+ struct acpi_video_bus *video = m->private;
char str[12] = { 0 };
unsigned long opt, options;
@@ -1119,8 +1116,8 @@ acpi_video_bus_write_DOS(struct file *file,
size_t count, loff_t * data)
{
int status;
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
+ struct seq_file *m = file->private_data;
+ struct acpi_video_bus *video = m->private;
char str[12] = { 0 };
unsigned long opt;
@@ -1150,7 +1147,7 @@ static int acpi_video_bus_add_fs(struct acpi_device *device)
struct acpi_video_bus *video;
- video = (struct acpi_video_bus *)acpi_driver_data(device);
+ video = acpi_driver_data(device);
if (!acpi_device_dir(device)) {
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
@@ -1226,7 +1223,7 @@ static int acpi_video_bus_remove_fs(struct acpi_device *device)
struct acpi_video_bus *video;
- video = (struct acpi_video_bus *)acpi_driver_data(device);
+ video = acpi_driver_data(device);
if (acpi_device_dir(device)) {
remove_proc_entry("info", acpi_device_dir(device));
@@ -1403,7 +1400,7 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video)
return status;
}
- dod = (union acpi_object *)buffer.pointer;
+ dod = buffer.pointer;
if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
status = -EFAULT;
@@ -1426,7 +1423,7 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video)
count = 0;
for (i = 0; i < dod->package.count; i++) {
- obj = (union acpi_object *)&dod->package.elements[i];
+ obj = &dod->package.elements[i];
if (obj->type != ACPI_TYPE_INTEGER) {
printk(KERN_ERR PREFIX "Invalid _DOD data\n");
@@ -1509,8 +1506,34 @@ static int
acpi_video_get_next_level(struct acpi_video_device *device,
u32 level_current, u32 event)
{
- /*Fix me */
- return level_current;
+ int min, max, min_above, max_below, i, l;
+ max = max_below = 0;
+ min = min_above = 255;
+ for (i = 0; i < device->brightness->count; i++) {
+ l = device->brightness->levels[i];
+ if (l < min)
+ min = l;
+ if (l > max)
+ max = l;
+ if (l < min_above && l > level_current)
+ min_above = l;
+ if (l > max_below && l < level_current)
+ max_below = l;
+ }
+
+ switch (event) {
+ case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
+ return (level_current < max) ? min_above : min;
+ case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
+ return (level_current < max) ? min_above : max;
+ case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
+ return (level_current > min) ? max_below : min;
+ case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
+ case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
+ return 0;
+ default:
+ return level_current;
+ }
}
static void
@@ -1612,7 +1635,7 @@ static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)data;
+ struct acpi_video_bus *video = data;
struct acpi_device *device = NULL;
printk("video bus notify\n");
@@ -1654,8 +1677,7 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
{
- struct acpi_video_device *video_device =
- (struct acpi_video_device *)data;
+ struct acpi_video_device *video_device = data;
struct acpi_device *device = NULL;
@@ -1757,7 +1779,7 @@ static int acpi_video_bus_remove(struct acpi_device *device, int type)
if (!device || !acpi_driver_data(device))
return -EINVAL;
- video = (struct acpi_video_bus *)acpi_driver_data(device);
+ video = acpi_driver_data(device);
acpi_video_bus_stop_devices(video);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-16 03:27:59 +0000