ACPI: thinkpad-acpi: Remove firmware backlight delays for Intel ACPI IGD OpRegion
commite9cb33222c39291d3de10e9bd1dbb6375a9b0a63
authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Tue, 24 Mar 2009 06:53:13 +0000 (24 03:53 -0300)
committerHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Tue, 24 Mar 2009 06:53:13 +0000 (24 03:53 -0300)
tree8d2e17060f14075898fd1b2436cea10befbbb26a
parent9c3a03501ae870af7cc6b91b0a8f881f50b75e78
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