#Maintained by: RehabMan for: Laptop Patches
#graphics_PNLF-Lenovo-Ux10.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 is specifically for the Lenovo Ux10 series
# laptops.
#
# 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)
#

into_all device label PNLF remove_entry;
into_all device name_adr 0x00020000 code_regex (OperationRegion\s\(RMPC,\sPCI_Config[^\}]*\}) remove_matched;

into device name_adr 0x00020000 insert
begin
OperationRegion (RMPC, PCI_Config, 0x10, 4)\n
Field (RMPC, AnyAcc, NoLock, Preserve)\n
{\n
    BAR1,32,\n
}\n
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
    //define hardware register access for brightness\n
    // lower nibble of BAR1 is status bits and not part of the address\n
    OperationRegion (BRIT, SystemMemory, And(^BAR1, Not(0xF)), 0xc8254)\n
    Field (BRIT, AnyAcc, Lock, Preserve)\n
    {\n
        Offset(0x4824c),\n
        LEV2, 32,\n
        LEVL, 32,\n
        Offset(0x7003C),\n
        P0BL, 32,\n
        Offset(0xc824c),\n
        LEVW, 32,\n
        LEVX, 32,\n
    }\n
    // DEB1 special for setting KLVX at runtime...\n
    //Method (DEB1, 1, NotSerialized)\n
    //{\n
    //    Store(Arg0, KLVX)\n
    //}\n
    // _INI deals with differences between native setting and desired\n
    Name (BRTL, 15)\n
    Method (_INI, 0, NotSerialized)\n
    {\n
        /*\n
        Store(ShiftRight(KLVX,16), Local0)\n
        Store(ShiftRight(LEVX,16), Local1)\n
        if (LNotEqual(Local0, Local1))\n
        {\n
            Divide(Multiply(LEVL, Local0), Local1,, Local0)\n
            //Store(P0BL, Local1)\n
            //While(LEqual (P0BL, Local1)) {}\n
            Store(Local0, LEVL)\n
            Store(KLVX, LEVX)\n
        }\n
        */\n
        // Note: Not sure if ECLV is read/write (may be write only)\n
        // comment this line out if reading is unreliable\n
        Store(\_SB.PCI0.LPCB.EC0.ECLV, BRTL)\n
    }\n
    // _BCM/_BQC: set/get for brightness level\n
    Method (_BCM, 1, NotSerialized)\n
    {\n
        /*\n
        // initialize for consistent backlight level before/after sleep\n
        If (LNotEqual(LEVW, 0x80000000)) { Store (0x80000000, LEVW) }\n
        If (LNotEqual(LEVX, KLVX)) { Store (KLVX, LEVX) }\n
        */\n
        // Update backlight via EC\n
        Store(Match(_BCL, MGE, Arg0, MTR, 0, 2), Local0)\n
        If (LEqual(Local0, Ones)) { Subtract(SizeOf(_BCL), 1, Local0) }\n
        Store(Local0, \_SB.PCI0.LPCB.EC0.ECLV)\n
        UCMS(0x14)\n
        Store(Local0, BRTL)\n
    }\n
    Method (_BQC, 0, NotSerialized)\n
    {\n
        /*\n
        Store(Match(_BCL, MGE, \_SB.PCI0.LPCB.EC0.ECLV, MTR, 0, 2), Local0)\n
        If (LEqual(Local0, Ones)) { Subtract(SizeOf(_BCL), 1, Local0) }\n
        Return(DerefOf(Index(_BCL, Local0)))\n
        */\n
        Return(BRTL)\n
    }\n
    Method (_DOS, 1, NotSerialized)\n
    {\n
        ^^_DOS(Arg0)\n
    }\n
    // Use XOPT=1 to disable smooth transitions\n
    Name (XOPT, 1)\n
    // XRGL/XRGH: defines the valid range\n
    Name (XRGL, 1)\n
    Name (XRGH, 15)\n
    // KLVX is initialization value for LEVX\n
    Name (KLVX, 0x7100000)\n
    // _BCL: returns list of valid brightness levels\n
    // first two entries describe ac/battery power levels\n
    Name (_BCL, Package()\n
    {\n
        15,\n
        4,\n
        0,\n
        1,2,3,4,5,6,7,8,9,10,11,12,13,14,14,15\n
    })\n
}\n
end;