ACPI: thinkpad-acpi: Remove firmware backlight delays for Intel ACPI IGD OpRegion
commitb918413cae2bc5152fe856c88ef609d04497c6ee
authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Tue, 11 Nov 2008 01:46:42 +0000 (10 23:46 -0200)
committerHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Sat, 22 Nov 2008 21:22:22 +0000 (22 19:22 -0200)
treeca21ad212446fcea883fc80e8fd6c63efadd56aa
parentda9f75bed1b60bee3597a8b668a2e899b1015c59
ACPI: thinkpad-acpi: Remove firmware backlight delays for Intel ACPI IGD OpRegion

Based on analysis and a patch from Matthew Garrett <mjg59@srcf.ucam.org>.

Instruct the ThinkPad ACPI firmware to remove delays on the processing of
backlight brightness changes.  This method is present on ThinkPad
Vista-compatible BIOSes with standard ACPI backlight level control.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Yves-Alexis Perez <corsac@debian.org>
drivers/misc/thinkpad_acpi.c