123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155 |
- /*++
- Copyright (c) 1999 - 2014, Intel Corporation. All rights reserved
- SPDX-License-Identifier: BSD-2-Clause-Patent
- Module Name:
- IgdOGBDA.ASL
- Abstract:
- IGD OpRegion/Software SCI Reference Code for the Baytrail Family.
- This file contains Get BIOS Data Area funciton support for
- the Integrated Graphics Device (IGD) OpRegion/Software SCI mechanism.
- --*/
- Method (GBDA, 0, Serialized)
- {
- // Supported calls: Sub-function 0
- If (LEqual(GESF, 0))
- {
- //<TODO> Update implementation specific supported calls. Reference
- // code is set to Intel's validated implementation.
- Store(0x0000279, PARM)
- Store(Zero, GESF) // Clear the exit parameter
- Return(SUCC) // Success
- }
- // Requested callbacks: Sub-function 1
- If (LEqual(GESF, 1))
- {
- //<TODO> Update implementation specific system BIOS requested call
- // back functions. Call back functions are where the driver calls the
- // system BIOS at function indicated event.
- Store(0x00000240, PARM)
- Store(Zero, GESF) // Clear the exit parameter
- Return(SUCC) // Success
- }
- // Get Boot display Preferences: Sub-function 4
- If (LEqual(GESF, 4))
- {
- //<TODO> Update the implementation specific 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))
- {
- //<TODO> Update the implementation specific 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(IBLC, 18), PARM) // Report the BLC setting
- Or(PARM, ShiftLeft(IBIA, 20), PARM) // Report the BIA setting
- Store(Zero, GESF)
- Return(SUCC)
- }
- // TV-standard/Video-connector: Sub-function 6
- If (LEqual(GESF, 6))
- {
- //<TODO> Update the implementation specific Get
- // TV-standard/Video-connectorPanel function.
- Store(ITVF, PARM)
- Or(PARM, ShiftLeft(ITVM, 4), PARM)
- 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 DISPLAY_CLOCK_FREQUENCY_ENCODING [MMADR+0x20C8]
- Or(ShiftLeft(Derefof(Index(CDCT, \_SB.PCI0.GFX0.MCHK.DCFE)), 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
- }
- // A call to a reserved "Get BIOS data" function was received.
- Store(Zero, GESF) // Clear the exit parameter
- Return(CRIT) // Reserved, "Critical failure"
- }
|