From a598c82f39892069a8f6693459b1179fd9ef30e1 Mon Sep 17 00:00:00 2001 From: Thomas Renninger Date: Fri, 1 Aug 2008 17:38:01 +0200 Subject: [PATCH] msi-laptop: fingers off backlight if video.ko is serving this functionality Signed-off-by: Thomas Renninger Acked-by: Zhang Rui Signed-off-by: Andi Kleen Signed-off-by: Len Brown --- drivers/misc/msi-laptop.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/misc/msi-laptop.c b/drivers/misc/msi-laptop.c index de898c6938f3..759763d18e4c 100644 --- a/drivers/misc/msi-laptop.c +++ b/drivers/misc/msi-laptop.c @@ -347,12 +347,16 @@ static int __init msi_init(void) /* Register backlight stuff */ - msibl_device = backlight_device_register("msi-laptop-bl", NULL, NULL, - &msibl_ops); - if (IS_ERR(msibl_device)) - return PTR_ERR(msibl_device); - - msibl_device->props.max_brightness = MSI_LCD_LEVEL_MAX-1; + if (acpi_video_backlight_support()) { + printk(KERN_INFO "MSI: Brightness ignored, must be controlled " + "by ACPI video driver\n"); + } else { + msibl_device = backlight_device_register("msi-laptop-bl", NULL, + NULL, &msibl_ops); + if (IS_ERR(msibl_device)) + return PTR_ERR(msibl_device); + msibl_device->props.max_brightness = MSI_LCD_LEVEL_MAX-1; + } ret = platform_driver_register(&msipf_driver); if (ret) -- 2.30.2