From: Thomas Renninger <trenn@xxxxxxx>
Signed-off-by: Thomas Renninger <trenn@xxxxxxx>
Acked-by: Zhang Rui <rui.zhang@xxxxxxxxx>
Acked-by: Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
---
drivers/misc/thinkpad_acpi.c | 29 +++++++++++++++++++----------
1 files changed, 19 insertions(+), 10 deletions(-)
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 4db1cf9..7a4a26b 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -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 (brightness_enable > 1) {
- printk(TPACPI_NOTICE
- "standard ACPI backlight interface "
- "available, not loading native one...\n");
- return 1;
+
+ if (acpi_video_backlight_support()) {
+ if (brightness_enable > 1) {
+ printk(TPACPI_NOTICE
+ "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");
+ }
}
}
--
1.6.0.3.640.g6331a
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