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authorThomas Renninger <trenn@suse.de>2008-08-01 17:38:02 +0200
committerLen Brown <len.brown@intel.com>2008-11-08 00:27:28 -0500
commit540b8bb9c33935183ceb5bed466a42ad72b2af56 (patch)
treeae338c3b374fd8e5812eb0d0ef94d88f1a84f1e7 /drivers/misc
parenta598c82f39892069a8f6693459b1179fd9ef30e1 (diff)
sony-laptop: fingers off backlight if video.ko is serving this functionality
Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/sony-laptop.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index 06f07e19dc7..7bcb81002dc 100644
--- a/drivers/misc/sony-laptop.c
+++ b/drivers/misc/sony-laptop.c
@@ -1038,7 +1038,11 @@ static int sony_nc_add(struct acpi_device *device)
goto outinput;
}
- if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "GBRT", &handle))) {
+ if (!acpi_video_backlight_support()) {
+ printk(KERN_INFO DRV_PFX "Sony: Brightness ignored, must be "
+ "controlled by ACPI video driver\n");
+ } else if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "GBRT",
+ &handle))) {
sony_backlight_device = backlight_device_register("sony", NULL,
NULL,
&sony_backlight_ops);