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ACPI_Annotated.asl
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ACPI_Annotated.asl
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/**
* This is the reverse engineered ACPI functions dedicated to handling the eGPU.
* Only relevant parts are included. This file should not be loaded.
*/
DefinitionBlock ("", "DSDT", 2, "ALASKA", "A M I ", 0x01072009)
{
Scope (_SB)
{
// This is called to disconnect the dGPU/iGPU/eGPU
Method (SUMA, 1, Serialized)
{
WOSR = One
GPCE = One
Local0 = DerefOf (EGIF [Zero])
If ((Local0 == 0x80)){}
ElseIf ((Local0 == 0x40))
{
If ((GPUM == One))
{
Notify (^PCI0.GPP0.PEGP, 0x03) // Eject Request
}
ElseIf ((GPUV == One))
{
Notify (^PCI0.GPP0.PEGP, 0x03) // Eject Request
}
ElseIf ((GPUV == 0x02))
{
Notify (^PCI0.GPP0.SWUS.SWDS.VGA, 0x03) // Eject Request
}
}
If ((Local0 == 0x40))
{
If ((WAT1 () == One))
{
GPCE = Zero
Return (Zero)
}
}
GPCE = Zero
If ((Arg0 == One))
{
UMAF = One
}
Return (One)
}
Scope (ATKD)
{
// This is called from the AKS driver to query status and start the eGPU
Method (WMNB, 3, Serialized)
{
CreateDWordField (Arg2, Zero, IIA0)
CreateDWordField (Arg2, 0x04, IIA1)
CreateDWordField (Arg2, 0x08, IIA2)
CreateDWordField (Arg2, 0x0C, IIA3)
CreateDWordField (Arg2, 0x10, IIA4)
Local0 = (Arg1 & 0xFFFFFFFF)
// ...
If ((Local0 == 0x53545344)) // DSTS
{
// ...
If ((IIA0 == 0x00090018)) // Get connector lock status
{
EGIF = ^^PCI0.SBRG.EC0.REBC (0x1C, 0x04)
Local1 = DerefOf (EGIF [One])
If ((Local1 & 0x02))
{
Return (0x00010001) // locked + valid
}
Else
{
Return (0x00010000) // unlocked + valid
}
}
// ...
If ((IIA0 == 0x00090019)) // Get eGPU connected
{
EGIF = ^^PCI0.SBRG.EC0.REBC (0x1C, 0x04)
Local1 = DerefOf (EGIF [Zero])
If ((Local1 & 0x40))
{
Return (0x00010001) // connected + valid
}
ElseIf ((Local1 & 0x80))
{
Return (0x00010000) // not connected + valid
}
Else
{
Return (Zero) // invalid
}
}
// ...
If ((IIA0 == 0x00090020)) // Get UMA mode
{
Local6 = (UMAF & One)
If ((Local6 == One))
{
Return (0x00010001)
}
ElseIf ((Local6 == Zero))
{
Return (0x00010000)
}
Else
{
Return (Zero)
}
}
// ...
If ((IIA0 == 0x0009001C)) // eGPU BIOS support
{
Return (0x00010003) // 0b1 = NVIDIA, 0b10 = AMD, 0b100 = Intel
}
}
// ...
If ((Local0 == 0x53564544)) // DEVS
{
// ...
If ((IIA0 == 0x00090019)) // Set eGPU connected
{
// Read pins from EC
EGIF = ^^PCI0.SBRG.EC0.REBC (0x1C, 0x04)
Local0 = DerefOf (EGIF [0x00]) // 0x80 = established, 0x40 = not established
Local1 = DerefOf (EGIF [0x01]) // 0x01 = connected, 0x02 = locked
Local2 = DerefOf (EGIF [0x02]) // 0x01 = AC power loss
// eGPU not connected
If ((Local0 == 0x80))
{
// AC power lost
If (((Local2 & 0x01) == 0x01))
{
Return (0x00)
}
// Cable connected + lock enabled
If (((Local1 & 0x03) != 0x03))
{
Return (0x00)
}
}
Local6 = (UMAF & 0x01)
If ((Local6 == 0x00))
{
If (ATKP)
{
// Notify ATK
IANE (0xBE)
}
If ((SUMA (0x01) == 0x00)) // disable dGPU
{
Return (0x01) // success
}
If (ATKP)
{
// Notify ATK: BIOS restart required
IANE (0xC2)
}
}
Sleep (0x03E8)
If ((IIA1 == 0x00)) // off
{
EGIF [0x00] = 0x0A
GPUM = 0x01
}
ElseIf ((IIA1 != 0x00)) // on
{
EGIF [0x00] = 0x0B
GPUM = 0x02
If ((Local6 == 0x01))
{
UMAF = 0x02
}
}
Local1 = M017 (0x00, 0x01, 0x01, 0x88, 0x00, 0x08)
Local1 &= 0xF0
If ((IIA1 == 0x0000)) // iGPU
{
GPUV = 0x01
M018 (0x00, 0x01, 0x01, 0x88, 0x00, 0x08, (Local1 | 0x03))
}
ElseIf ((IIA1 == 0x0101)) // AMD eGPU
{
GPUV = 0x02
M018 (0x00, 0x01, 0x01, 0x88, 0x00, 0x08, (Local1 | 0x03))
}
ElseIf ((IIA1 == 0x0201)) // Intel eGPU
{
GPUV = 0x03
M018 (0x00, 0x01, 0x01, 0x88, 0x00, 0x08, (Local1 | 0x03))
}
Else // NVIDIA eGPU
{
GPUV = 0x00
M018 (0x00, 0x01, 0x01, 0x88, 0x00, 0x08, (Local1 | 0x04))
}
// Write to EC
^^PCI0.SBRG.EC0.WEBC (0x1C, 0x01, EGIF)
// Wait for write to complete
WAT3 (Local0)
CONT += 0x01
If ((IIA1 == 0x00)){} // off
ElseIf ((IIA1 != 0x00)) // on
{
// Turn on eGPU hardware support
FGON ()
Sleep (2000)
// Notify ACPI changes
If ((SHGM (0x02) == 0x00)) // if PCI device is not detected
{
Return (0x02) // reboot required
}
If ((GPUV == 0x02)) // AMD only
{
If ((ACPT == 0x01))
{
Local5 = 0x64
}
ElseIf ((ACPT == 0x02))
{
Local5 = 0xA5
}
ElseIf ((ACPT == 0x03))
{
Local5 = 0x50
}
Else
{
Local5 = 0x64
}
Local5 <<= 0x08
^^PCI0.GP17.VGA.AFNC (0x02, Local5)
}
}
Return (0x01) // success
}
}
}
}
}
Scope (PCI0)
{
Scope (SBRG)
{
Scope (EC0)
{
// This is called when connector is mated/unmated and lock detect is asserted/deasserted
Method (_QF5, 0, Serialized) // _Qxx: EC Query, xx=0x00-0xFF
{
Previous = DerefOf (EGIF [0x01])
EGIF = REBC (0x1C, 0x04)
Local0 = DerefOf (EGIF [0x00])
Local1 = DerefOf (EGIF [0x01])
Local2 = DerefOf (EGIF [0x02])
Switch (Previous)
{
Case (0x00) // not connected
{
If ((Local1 == 0x01)) // connected
{
If (ATKP)
{
^^^^ATKD.IANE (0xB9) // Connect Change
}
}
}
Case (0x01) // connected
{
If ((Local1 == 0x00)) // not connected
{
If (ATKP)
{
^^^^ATKD.IANE (0xB9) // Connect Change
}
}
If ((Local1 == 0x03)) // locked
{
If (ATKP)
{
^^^^ATKD.IANE (0xBA) // Switch-Lock Change
}
If ((Local0 == 0x40)) // eGPU enabled
{
Return (0x00)
}
}
}
Case (0x03) // locked
{
If ((Local1 == 0x01)) // unlocked
{
If (ATKP)
{
^^^^ATKD.IANE (0xBA) // Switch-Lock Change
}
}
}
}
// NOTE: there is a bug here where if the lock switch is asserted at the
// same time as the connector is mated, it would not be detected because
// there is no going from 0x00 -> 0x03.
If ((Local0 == 0x40)) // eGPU connected (but cable no longer locked)
{
If (ATKP)
{
^^^^ATKD.IANE (0xBE)
}
If ((SUMA (0x00) == 0x00)) // disable eGPU
{
Return (0x00)
}
If (ATKP)
{
^^^^ATKD.IANE (0xC2) // restart required
}
Sleep (0x03E8)
EGIF [0x00] = 0x0A // turn off
GPUM = 0x01
GPUV = 0x00
Local1 = M017 (0x00, 0x01, 0x01, 0x88, 0x00, 0x08)
Local1 &= 0xF0
M018 (0x00, 0x01, 0x01, 0x88, 0x00, 0x08, (Local1 | 0x04))
WEBC (0x1C, 0x01, EGIF) // write to EC
WAT3 (Local0) // wait for EC write to complete
Local6 = (UMAF & 0x02)
If ((Local6 == 0x00))
{
FGON ()
Sleep (0x07D0)
If ((SHGM (0x01) == 0x00))
{
Return (0x02)
}
}
Else
{
UMAF = 0x01
}
}
Else
{
Return (0x00)
}
}
// This is called when P_AC_LOSS_10 changes
Method (_QF6, 0, NotSerialized) // _Qxx: EC Query, xx=0x00-0xFF
{
EGIF = REBC (0x1C, 0x04)
Local0 = DerefOf (EGIF [0x00])
Local1 = DerefOf (EGIF [0x01])
Local2 = DerefOf (EGIF [0x02])
If (((Local2 & 0x01) == 0x01))
{
If (ATKP)
{
^^^^ATKD.IANE (0xBB) // External Power Loss
}
}
If ((Local0 == 0x40)) // eGPU connected, same as _QF5
{
If (ATKP)
{
^^^^ATKD.IANE (0xBE)
}
If ((SUMA (0x00) == 0x00))
{
Return (0x00)
}
If (ATKP)
{
^^^^ATKD.IANE (0xC2)
}
Sleep (0x03E8)
EGIF [0x00] = 0x0A
GPUM = 0x01
GPUV = 0x00
Local1 = M017 (0x00, 0x01, 0x01, 0x88, 0x00, 0x08)
Local1 &= 0xF0
M018 (0x00, 0x01, 0x01, 0x88, 0x00, 0x08, (Local1 | 0x04))
WEBC (0x1C, 0x01, EGIF)
WAT3 (Local0)
Local6 = (UMAF & 0x02)
If ((Local6 == 0x00))
{
FGON ()
Sleep (0x07D0)
If ((SHGM (0x01) == 0x00))
{
Return (0x02)
}
}
Else
{
UMAF = 0x01
}
}
Else
{
Return (0x00)
}
}
}
}
}
}