static int acpi_video_get_brightness(struct backlight_device *bd)
{
unsigned long cur_level;
+ int i;
struct acpi_video_device *vd =
(struct acpi_video_device *)bl_get_data(bd);
acpi_video_device_lcd_get_level_current(vd, &cur_level);
- return (int) cur_level;
+ for (i = 2; i < vd->brightness->count; i++) {
+ if (vd->brightness->levels[i] == cur_level)
+ /* The first two entries are special - see page 575
+ of the ACPI spec 3.0 */
+ return i-2;
+ }
+ return 0;
}
static int acpi_video_set_brightness(struct backlight_device *bd)
{
- int request_level = bd->props.brightness;
+ int request_level = bd->props.brightness+2;
struct acpi_video_device *vd =
(struct acpi_video_device *)bl_get_data(bd);
- acpi_video_device_lcd_set_level(vd, request_level);
+ acpi_video_device_lcd_set_level(vd,
+ vd->brightness->levels[request_level]);
return 0;
}
kfree(obj);
if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
- unsigned long tmp;
static int count = 0;
char *name;
name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
return;
sprintf(name, "acpi_video%d", count++);
- acpi_video_device_lcd_get_level_current(device, &tmp);
device->backlight = backlight_device_register(name,
NULL, device, &acpi_backlight_ops);
- device->backlight->props.max_brightness = max_level;
- device->backlight->props.brightness = (int)tmp;
+ device->backlight->props.max_brightness = device->brightness->count-3;
+ device->backlight->props.brightness = acpi_video_get_brightness(device->backlight);
backlight_update_status(device->backlight);
kfree(name);
static int acpi_video_bus_add_fs(struct acpi_device *device)
{
+ long device_id;
+ int status;
struct proc_dir_entry *entry = NULL;
struct acpi_video_bus *video;
+ struct device *dev;
+
+ status =
+ acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
+
+ if (!ACPI_SUCCESS(status))
+ return -ENODEV;
+
+ /* We need to attempt to determine whether the _ADR refers to a
+ PCI device or not. There's no terribly good way to do this,
+ so the best we can hope for is to assume that there'll never
+ be a video device in the host bridge */
+ if (device_id >= 0x10000) {
+ /* It looks like a PCI device. Does it exist? */
+ dev = acpi_get_physical_device(device->handle);
+ } else {
+ /* It doesn't look like a PCI device. Does its parent
+ exist? */
+ acpi_handle phandle;
+ if (acpi_get_parent(device->handle, &phandle))
+ return -ENODEV;
+ dev = acpi_get_physical_device(phandle);
+ }
+ if (!dev)
+ return -ENODEV;
+ put_device(dev);
+
video = acpi_driver_data(device);