RehabMan Brightness Fix Haswell

#Maintained by: RehabMan for: Laptop Patches
#graphics_PNLF_haswell.txt

# This patch enables the brightness slider in SysPrefs->Displays
# and will also enable activation of sleep mode by closing
# the laptop lid.
#
# This particular version is intended to be used with ACPIBacklight.kext
# although it can also be used with AppleBacklight.kext,
# provided AppleBacklight.kext is patched to recognize your
# display or an injector is used to set brightness levels.
#
# See this thread for more information:
#     http://www.tonymacx86.com/hp-probook-mavericks/121031-native-brightness-working-without-blinkscreen-using-patched-applebacklight-kext.html
# (also read any linked threads)
#
# 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, 15)\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)), 0xe1184)\n
    Field (BRIT, AnyAcc, Lock, Preserve)\n
    {\n
        Offset(0x48250),\n
        LEV2, 32,\n
        LEVL, 32,\n
        Offset(0x70040),\n
        P0BL, 32,\n
        Offset(0xc8250),\n
        LEVW, 32,\n
        LEVX, 32,\n
        Offset(0xe1180),\n
        PCHL, 32,\n
    }\n
    // LMAX: use 0xad9/0x56c/0x5db to force OS X value\n
    //       or use any arbitrary value\n
    //       or use 0 to capture BIOS setting\n
    Name (LMAX, 0xad9)\n
    // KMAX: defines the unscaled range in the _BCL table below\n
    Name (KMAX, 0xad9)\n
    // _INI deals with differences between native setting and desired\n
    Method (_INI, 0, NotSerialized)\n
    {\n
        // This 0xC value comes from looking what OS X initializes this\n
        // register to after display sleep (using ACPIDebug/ACPIPoller)\n
        Store(0xC0000000, LEVW)\n
        // determine LMAX to use\n
        If (LNot(LMAX)) { Store(ShiftRight(LEVX,16), LMAX) }\n
        If (LNot(LMAX)) { Store(KMAX, LMAX) }\n
        If (LNotEqual(LMAX, KMAX))\n
        {\n
            // Scale all the values in _BCL to the PWM max in use\n
            Store(0, Local0)\n
            While (LLess(Local0, SizeOf(_BCL)))\n
            {\n
                Store(DerefOf(Index(_BCL,Local0)), Local1)\n
                Divide(Multiply(Local1,LMAX), KMAX,, Local1)\n
                Store(Local1, Index(_BCL,Local0))\n
                Increment(Local0)\n
            }\n
            // Also scale XRGL and XRGH values\n
            Divide(Multiply(XRGL,LMAX), KMAX,, XRGL)\n
            Divide(Multiply(XRGH,LMAX), KMAX,, XRGH)\n
        }\n
        // adjust values to desired LMAX\n
        Store(ShiftRight(LEVX,16), Local1)\n
        If (LNotEqual(Local1, LMAX))\n
        {\n
            Store(And(LEVX,0xFFFF), Local0)\n
            If (LOr(LNot(Local0),LNot(Local1))) { Store(LMAX, Local0) Store(LMAX, Local1) }\n
            Divide(Multiply(Local0,LMAX), Local1,, Local0)\n
            //REVIEW: wait for vblank before setting new PWM config\n
            //Store(P0BL, Local7)\n
            //While (LEqual (P0BL, Local7)) {}\n
            Store(Or(Local0,ShiftLeft(LMAX,16)), LEVX)\n
        }\n
    }\n
    // _BCM/_BQC: set/get for brightness level\n
    Method (_BCM, 1, NotSerialized)\n
    {\n
        // store new backlight level\n
        Store(Match(_BCL, MGE, Arg0, MTR, 0, 2), Local0)\n
        If (LEqual(Local0, Ones)) { Subtract(SizeOf(_BCL), 1, Local0) }\n
        Store(Or(DerefOf(Index(_BCL,Local0)),ShiftLeft(LMAX,16)), LEVX)\n
    }\n
    Method (_BQC, 0, NotSerialized)\n
    {\n
        Store(Match(_BCL, MGE, And(LEVX, 0xFFFF), MTR, 0, 2), Local0)\n
        If (LEqual(Local0, Ones)) { Subtract(SizeOf(_BCL), 1, Local0) }\n
        Return(DerefOf(Index(_BCL, Local0)))\n
    }\n
    Method (_DOS, 1, NotSerialized)\n
    {\n
        // Note: Some systems have this defined in DSDT, so uncomment\n
        // the next line if that is the case.\n
        //External(^^_DOS, MethodObj)\n
        ^^_DOS(Arg0)\n
    }\n
    // extended _BCM/_BQC for setting "in between" levels\n
    Method (XBCM, 1, NotSerialized)\n
    {\n
        // store new backlight level\n
        If (LGreater(Arg0, XRGH)) { Store(XRGH, Arg0) }\n
        If (LAnd(Arg0, LLess(Arg0, XRGL))) { Store(XRGL, Arg0) }\n
        Store(Or(Arg0,ShiftLeft(LMAX,16)), LEVX)\n
    }\n
    Method (XBQC, 0, NotSerialized)\n
    {\n
        Store(And(LEVX,0xFFFF), Local0)\n
        If (LGreater(Local0, XRGH)) { Store(XRGH, Local0) }\n
        If (LAnd(Local0, LLess(Local0, XRGL))) { Store(XRGL, Local0) }\n
        Return(Local0)\n
    }\n
    // Use XOPT=1 to disable smooth transitions\n
    Name (XOPT, Zero)\n
    // XRGL/XRGH: defines the valid range\n
    Name (XRGL, 25)\n
    Name (XRGH, 2777)\n
    // _BCL: returns list of valid brightness levels\n
    // first two entries describe ac/battery power levels\n
    Name (_BCL, Package()\n
    {\n
        2777,\n
        748,\n
        0,\n
        35, 39, 44, 50,\n
        58, 67, 77, 88,\n
        101, 115, 130, 147,\n
        165, 184, 204, 226,\n
        249, 273, 299, 326,\n
        354, 383, 414, 446,\n
        479, 514, 549, 587,\n
        625, 665, 706, 748,\n
        791, 836, 882, 930,\n
        978, 1028, 1079, 1132,\n
        1186, 1241, 1297, 1355,\n
        1414, 1474, 1535, 1598,\n
        1662, 1728, 1794, 1862,\n
        1931, 2002, 2074, 2147,\n
        2221, 2296, 2373, 2452,\n
        2531, 2612, 2694, 2777,\n
    })\n
}\n
end;