#Maintained by: RehabMan for: Laptop Patches
#graphics_PNLF-ACPI100.txt

# This patch enables the brightness slider in SysPrefs->Displays
# and will also enable activation of sleep mode by closing
# the laptop lid.
#
# This patch works well for laptops that have working
# ACPI methods with 64-or more levels (100 is common)
# for good support for Windows 2012 (Windows 8)
#
# Based on information from the normal laptop DSDT methods,
# optimized for use with ACPIBacklight.kext
#
# Note: This patch should be applied to the DSDT or SSDT that defines
# your integrated graphics device (always at _ADR 0x00020000)
# applied to one of the SSDTs, not DSDT.
#
# Note: Intended to be used with Windows 2012, so this should be done...
# if you previously patched for Windows 2006, undo that patch!

# sometimes in Scope (_SB.PCI0)
into method label _INI parent_label _SB.PCI0 code_regex If\s+\(_OSI\s+\(\"Windows\s2012\"\)\) replace_matched
begin If(LOr(_OSI("Darwin"),_OSI("Windows 2012"))) end;

# sometimes in Scope (_SB)
into method label _INI parent_label _SB code_regex If\s+\(_OSI\s+\(\"Windows\s2012\"\)\) replace_matched
begin If(LOr(_OSI("Darwin"),_OSI("Windows 2012"))) end;


into_all device label PNLF remove_entry;
into device name_adr 0x00020000 insert
begin
Device (PNLF)\n
{\n
    // normal PNLF declares (note some of this probably not necessary)\n
    Name (_ADR, Zero)\n
    Name (_HID, EisaId ("APP0002"))\n
    Name (_CID, "backlight")\n
    Name (_UID, 10)\n
    Name (_STA, 0x0B)\n
    // _BCM/_BQC: set/get for brightness level\n
    Method (_BCM, 1, NotSerialized)\n
    {\n
        // Update backlight via existing DSDT methods\n
        ^^DD02._BCM(Arg0)\n
    }\n
    Method (_BQC, 0, NotSerialized)\n
    {\n
        Return(^^DD02._BQC())\n
    }\n
    Method (_BCL, 0, NotSerialized)\n
    {\n
        Return(^^DD02._BCL())\n
    }\n
    Method (_DOS, 1, NotSerialized)\n
    {\n
        ^^_DOS(Arg0)\n
    }\n
    // extended _BCM/_BQC for setting "in between" levels\n
    Method (XBCM, 1, NotSerialized)\n
    {\n
        // Update backlight via existing DSDT methods\n
        ^^DD02._BCM(Arg0)\n
    }\n
    Method (XBQC, 0, NotSerialized)\n
    {\n
        Return(^^DD02._BQC())\n
    }\n
    // Use XOPT=1 to disable smooth transitions\n
    Name (XOPT, Zero)\n
    // XRGL/XRGH: defines the valid range\n
    Method (XRGL, 0, NotSerialized)\n
    {\n
        Store(_BCL(), Local0)\n
        Store(DerefOf(Index(Local0, 2)), Local0)\n
        Return(Local0)\n
    }\n
    Method (XRGH, 0, NotSerialized)\n
    {\n
        Store(_BCL(), Local0)\n
        Store(DerefOf(Index(Local0, Subtract(SizeOf(Local0), 1))), Local0)\n
        Return(Local0)\n
    }\n
}\n
end;