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thinkpad_acpi: fingers off backlight if video.ko is serving this functionality

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Signed-off-by: Thomas Renninger <trenn@suse.de>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Thomas Renninger 2008-08-01 17:38:03 +02:00 committed by Len Brown
parent 540b8bb9c3
commit 2dba1b5d87
1 changed files with 19 additions and 10 deletions
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23
drivers/misc/thinkpad_acpi.c
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@ -4932,16 +4932,25 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
*/
b = tpacpi_check_std_acpi_brightness_support();
if (b > 0) {
if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
printk(TPACPI_NOTICE
"Lenovo BIOS switched to ACPI backlight "
"control mode\n");
}
if (acpi_video_backlight_support()) {
if (brightness_enable > 1) {
printk(TPACPI_NOTICE
"standard ACPI backlight interface "
"available, not loading native one...\n");
"Standard ACPI backlight interface "
"available, not loading native one.\n");
return 1;
} else if (brightness_enable == 1) {
printk(TPACPI_NOTICE
"Backlight control force enabled, even if standard "
"ACPI backlight interface is available\n");
}
} else {
if (brightness_enable > 1) {
printk(TPACPI_NOTICE
"Standard ACPI backlight interface not "
"available, thinkpad_acpi native "
"brightness control enabled\n");
}
}
}