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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.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 9d75ead..185a57d 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1681,6 +1681,19 @@ static void acpi_video_dev_register_backlight(struct acpi_video_device *device)
printk(KERN_ERR PREFIX "Create sysfs link\n");
}
+static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video)
+{
+ struct acpi_video_device *dev;
+ union acpi_object *levels;
+
+ mutex_lock(&video->device_list_lock);
+ list_for_each_entry(dev, &video->video_device_list, entry) {
+ if (!acpi_video_device_lcd_query_levels(dev, &levels))
+ kfree(levels);
+ }
+ mutex_unlock(&video->device_list_lock);
+}
+
static int acpi_video_bus_register_backlight(struct acpi_video_bus *video)
{
struct acpi_video_device *dev;
@@ -1688,6 +1701,8 @@ static int acpi_video_bus_register_backlight(struct acpi_video_bus *video)
if (video->backlight_registered)
return 0;
+ acpi_video_run_bcl_for_osi(video);
+
if (!acpi_video_verify_backlight_support())
return 0;