/** @file
|
IGD OpRegion/Software SCI Reference Code.
|
This file contains Get BIOS Data Area funciton support for
|
the Integrated Graphics Device (IGD) OpRegion/Software SCI mechanism
|
|
Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
**/
|
Method (GBDA, 0, Serialized)
|
{
|
//
|
// Supported calls: Sub-function 0
|
//
|
If (LEqual(GESF, 0))
|
{
|
//
|
//<NOTE> Reference code is set to Intel's validated implementation.
|
//
|
Store(0x0000659, PARM)
|
Store(Zero, GESF) // Clear the exit parameter
|
Return(SUCC) // Success
|
}
|
//
|
// Requested callbacks: Sub-function 1
|
//
|
If (LEqual(GESF, 1))
|
{
|
//
|
//<NOTE> Call back functions are where the driver calls the
|
// system BIOS at function indicated event.
|
//
|
Store(0x300482, PARM)
|
If(LEqual(S0ID, One)){
|
Or(PARM, 0x100, PARM) //Request Fn 8 callback in CS systems
|
}
|
Store(Zero, GESF) // Clear the exit parameter
|
Return(SUCC) // Success
|
}
|
//
|
// Get Boot display Preferences: Sub-function 4
|
//
|
If (LEqual(GESF, 4))
|
{
|
//
|
//<NOTE> Get Boot Display Preferences function.
|
//
|
And(PARM, 0xEFFF0000, PARM) // PARM[30:16] = Boot device ports
|
And(PARM, ShiftLeft(DeRefOf(Index(DBTB, IBTT)), 16), PARM)
|
Or(IBTT, PARM, PARM) // PARM[7:0] = Boot device type
|
Store(Zero, GESF) // Clear the exit parameter
|
Return(SUCC) // Success
|
}
|
//
|
// Panel details: Sub-function 5
|
//
|
If (LEqual(GESF, 5))
|
{
|
//
|
//<NOTE> Get Panel Details function.
|
//
|
Store(IPSC, PARM) // Report the scaling setting
|
Or(PARM, ShiftLeft(IPAT, 8), PARM)
|
Add(PARM, 0x100, PARM) // Adjust panel type, 0 = VBT default
|
Or(PARM, ShiftLeft(LIDS, 16), PARM) // Report the lid state
|
Add(PARM, 0x10000, PARM) // Adjust the lid state, 0 = Unknown
|
Or(PARM, ShiftLeft(IBIA, 20), PARM) // Report the BIA setting
|
Store(Zero, GESF)
|
Return(SUCC)
|
}
|
//
|
// Internal graphics: Sub-function 7
|
//
|
If (LEqual(GESF, 7))
|
{
|
Store(GIVD, PARM) // PARM[0] - VGA mode(1=VGA)
|
Xor(PARM, 1, PARM) // Invert the VGA mode polarity
|
Or(PARM, ShiftLeft(GMFN, 1), PARM) // PARM[1] - # IGD PCI functions-1
|
// PARM[3:2] - Reserved
|
// PARM[4] - IGD D3 support(0=cold)
|
// PARM[10:5] - Reserved
|
Or(PARM, ShiftLeft(3, 11), PARM) // PARM[12:11] - DVMT mode(11b = 5.0)
|
|
//
|
// Report DVMT 5.0 Total Graphics memory size.
|
//
|
Or(PARM, ShiftLeft(IDMS, 17), PARM) // Bits 20:17 are for Gfx total memory size
|
//
|
// If the "Set Internal Graphics" call is supported, the modified
|
// settings flag must be programmed per the specification. This means
|
// that the flag must be set to indicate that system BIOS requests
|
// these settings. Once "Set Internal Graphics" is called, the
|
// modified settings flag must be cleared on all subsequent calls to
|
// this function.
|
// Report the graphics frequency based on B0:D2:F0:RF0h[12]. Must
|
// take into account the current VCO.
|
//
|
Or(ShiftLeft(Derefof(Index(Derefof(Index(CDCT, HVCO)), CDVL)), 21),PARM, PARM)
|
Store(1, GESF) // Set the modified settings flag
|
Return(SUCC)
|
}
|
//
|
// Spread spectrum clocks: Sub-function 10
|
//
|
If (LEqual(GESF, 10))
|
{
|
Store(0, PARM) // Assume SSC is disabled
|
If(ISSC)
|
{
|
Or(PARM, 3, PARM) // If SSC enabled, return SSC1+Enabled
|
}
|
Store(0, GESF) // Set the modified settings flag
|
Return(SUCC) // Success
|
}
|
|
If (LEqual(GESF, 11))
|
{
|
Store(KSV0, PARM) // First four bytes of AKSV
|
Store(KSV1, GESF) // Fifth byte of AKSV
|
|
Return(SUCC) // Success
|
}
|
//
|
// A call to a reserved "Get BIOS data" function was received.
|
//
|
Store(Zero, GESF) // Clear the exit parameter
|
Return(CRIT) // Reserved, "Critical failure"
|
}
|
