Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=863c1490e512db40dab61e44b694a493a9e68b3f
Commit:     863c1490e512db40dab61e44b694a493a9e68b3f
Parent:     7761f638f6e0f276fe8612ba306d09c40d1b553c
Author:     Matthew Garrett <[EMAIL PROTECTED]>
AuthorDate: Mon Feb 4 23:31:24 2008 -0800
Committer:  Len Brown <[EMAIL PROTECTED]>
CommitDate: Thu Feb 7 03:22:57 2008 -0500

    ACPI: video: reset brightness on resume
    
    Some machines seem to need the backlight brightness to be reset on resume.
    Add support for doing so to the video module.
    
    [EMAIL PROTECTED]: coding-style fixes]
    Signed-off-by: Matthew Garrett <[EMAIL PROTECTED]>
    Cc: Zhang Rui <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Len Brown <[EMAIL PROTECTED]>
---
 drivers/acpi/video.c |   21 +++++++++++++++++++++
 1 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 74ff0fa..b5e35cd 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -77,6 +77,7 @@ module_param(brightness_switch_enabled, bool, 0644);
 
 static int acpi_video_bus_add(struct acpi_device *device);
 static int acpi_video_bus_remove(struct acpi_device *device, int type);
+static int acpi_video_resume(struct acpi_device *device);
 
 static const struct acpi_device_id video_device_ids[] = {
        {ACPI_VIDEO_HID, 0},
@@ -91,6 +92,7 @@ static struct acpi_driver acpi_video_bus = {
        .ops = {
                .add = acpi_video_bus_add,
                .remove = acpi_video_bus_remove,
+               .resume = acpi_video_resume,
                },
 };
 
@@ -1837,6 +1839,25 @@ static void acpi_video_device_notify(acpi_handle handle, 
u32 event, void *data)
 }
 
 static int instance;
+static int acpi_video_resume(struct acpi_device *device)
+{
+       struct acpi_video_bus *video;
+       struct acpi_video_device *video_device;
+       int i;
+
+       if (!device || !acpi_driver_data(device))
+               return -EINVAL;
+
+       video = acpi_driver_data(device);
+
+       for (i = 0; i < video->attached_count; i++) {
+               video_device = video->attached_array[i].bind_info;
+               if (video_device && video_device->backlight)
+                       acpi_video_set_brightness(video_device->backlight);
+       }
+       return AE_OK;
+}
+
 static int acpi_video_bus_add(struct acpi_device *device)
 {
        acpi_status status;
-
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