Vlv2DeviceRefCodePkg/AcpiTablesPCAT/IgdOGBDA.ASL

   1 /*++
   2
   3 Copyright (c)  1999  - 2014, Intel Corporation. All rights reserved
   4
   5   This program and the accompanying materials are licensed and made available under
   6   the terms and conditions of the BSD License that accompanies this distribution.
   7   The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php.
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13
  14
  15 Module Name:
  16
  17   IgdOGBDA.ASL
  18
  19 Abstract:
  20
  21   IGD OpRegion/Software SCI Reference Code for the Baytrail Family.
  22   This file contains Get BIOS Data Area funciton support for
  23   the Integrated Graphics Device (IGD) OpRegion/Software SCI mechanism.
  24
  25 --*/
  26
  27
  28 Method (GBDA, 0, Serialized)
  29 {
  30
  31   // Supported calls: Sub-function 0
  32
  33   If (LEqual(GESF, 0))
  34   {
  35     //<TODO> Update implementation specific supported calls.  Reference
  36     // code is set to Intel's validated implementation.
  37
  38     Store(0x0000279, PARM)
  39
  40     Store(Zero, GESF)               // Clear the exit parameter
  41     Return(SUCC)                    // Success
  42   }
  43
  44   // Requested callbacks: Sub-function 1
  45
  46   If (LEqual(GESF, 1))
  47   {
  48
  49     //<TODO> Update implementation specific system BIOS requested call
  50     // back functions.  Call back functions are where the driver calls the
  51     // system BIOS at function indicated event.
  52
  53     Store(0x00000240, PARM)
  54
  55     Store(Zero, GESF)               // Clear the exit parameter
  56     Return(SUCC)                    // Success
  57   }
  58
  59   // Get Boot display Preferences: Sub-function 4
  60
  61   If (LEqual(GESF, 4))
  62   {
  63
  64     //<TODO> Update the implementation specific Get Boot Display
  65     // Preferences function.
  66
  67     And(PARM, 0xEFFF0000, PARM)     // PARM[30:16] = Boot device ports
  68     And(PARM, ShiftLeft(DeRefOf(Index(DBTB, IBTT)), 16), PARM)
  69     Or(IBTT, PARM, PARM)            // PARM[7:0] = Boot device type
  70
  71     Store(Zero, GESF)               // Clear the exit parameter
  72     Return(SUCC)                    // Success
  73   }
  74
  75   // Panel details: Sub-function 5
  76
  77   If (LEqual(GESF, 5))
  78   {
  79
  80     //<TODO> Update the implementation specific Get Panel Details
  81     // function.
  82
  83     Store(IPSC, PARM)               // Report the scaling setting
  84     Or(PARM, ShiftLeft(IPAT, 8), PARM)
  85     Add(PARM, 0x100, PARM)          // Adjust panel type, 0 = VBT default
  86     Or(PARM, ShiftLeft(LIDS, 16), PARM) // Report the lid state
  87     Add(PARM, 0x10000, PARM)        // Adjust the lid state, 0 = Unknown
  88     Or(PARM, ShiftLeft(IBLC, 18), PARM) // Report the BLC setting
  89     Or(PARM, ShiftLeft(IBIA, 20), PARM) // Report the BIA setting
  90     Store(Zero, GESF)
  91     Return(SUCC)
  92   }
  93
  94   // TV-standard/Video-connector: Sub-function 6
  95
  96   If (LEqual(GESF, 6))
  97   {
  98
  99     //<TODO> Update the implementation specific Get
 100     // TV-standard/Video-connectorPanel function.
 101
 102     Store(ITVF, PARM)
 103     Or(PARM, ShiftLeft(ITVM, 4), PARM)
 104     Store(Zero, GESF)
 105     Return(SUCC)
 106   }
 107
 108   // Internal graphics: Sub-function 7
 109
 110   If (LEqual(GESF, 7))
 111   {
 112     Store(GIVD, PARM)               // PARM[0]      - VGA mode(1=VGA)
 113     Xor(PARM, 1, PARM)              // Invert the VGA mode polarity
 114     Or(PARM, ShiftLeft(GMFN, 1), PARM) // PARM[1]   - # IGD PCI functions-1
 115     // PARM[3:2]    - Reserved
 116     // PARM[4]      - IGD D3 support(0=cold)
 117     // PARM[10:5]   - Reserved
 118     Or(PARM, ShiftLeft(3, 11), PARM) // PARM[12:11] - DVMT mode(11b = 5.0)
 119
 120     //
 121     // Report DVMT 5.0 Total Graphics memory size.
 122     //
 123     Or(PARM, ShiftLeft(IDMS, 17), PARM)   // Bits 20:17 are for Gfx total memory size
 124
 125     // If the "Set Internal Graphics" call is supported, the modified
 126     // settings flag must be programmed per the specification.  This means
 127     // that the flag must be set to indicate that system BIOS requests
 128     // these settings.  Once "Set Internal Graphics" is called, the
 129     //  modified settings flag must be cleared on all subsequent calls to
 130     // this function.
 131
 132     // Report the graphics frequency based on DISPLAY_CLOCK_FREQUENCY_ENCODING [MMADR+0x20C8]
 133
 134     Or(ShiftLeft(Derefof(Index(CDCT, \_SB.PCI0.GFX0.MCHK.DCFE)), 21),PARM, PARM)
 135
 136     Store(1, GESF)                  // Set the modified settings flag
 137     Return(SUCC)
 138   }
 139
 140   // Spread spectrum clocks: Sub-function 10
 141
 142   If (LEqual(GESF, 10))
 143   {
 144
 145     Store(0, PARM)                  // Assume SSC is disabled
 146
 147     If(ISSC)
 148     {
 149       Or(PARM, 3, PARM)       // If SSC enabled, return SSC1+Enabled
 150     }
 151
 152     Store(0, GESF)                  // Set the modified settings flag
 153     Return(SUCC)                    // Success
 154   }
 155
 156
 157   // A call to a reserved "Get BIOS data" function was received.
 158
 159   Store(Zero, GESF)                     // Clear the exit parameter
 160   Return(CRIT)                          // Reserved, "Critical failure"
 161 }