audk/MdePkg/Include/Protocol/EdidActive.h

/** @file
  EDID Active Protocol from the UEFI 2.0 specification.

  Placed on the video output device child handle that are actively displaying output.

  Copyright (c) 2006 - 2008, Intel Corporation                                                         
  All rights reserved. This program and the accompanying materials                          
  are licensed and made available under the terms and conditions of the BSD License         
  which accompanies this distribution.  The full text of the license may be found at        
  http://opensource.org/licenses/bsd-license.php                                            

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

**/

#ifndef __EDID_ACTIVE_H__
#define __EDID_ACTIVE_H__

#define EFI_EDID_ACTIVE_PROTOCOL_GUID \
  { \
    0xbd8c1056, 0x9f36, 0x44ec, {0x92, 0xa8, 0xa6, 0x33, 0x7f, 0x81, 0x79, 0x86 } \
  }

/**
  @par Protocol Description:
  This protocol contains the EDID information for an active video output device. This is either the
  EDID information retrieved from the EFI_EDID_OVERRIDE_PROTOCOL if an override is
  available, or an identical copy of the EDID information from the
  EFI_EDID_DISCOVERED_PROTOCOL if no overrides are available.

  @param SizeOfEdid 
  The size, in bytes, of the Edid buffer. 0 if no EDID information
  is available from the video output device. Otherwise, it must be a
  minimum of 128 bytes.
  
  @param Edid 
  A pointer to a read-only array of bytes that contains the EDID
  information for an active video output device. This pointer is
  NULL if no EDID information is available for the video output
  device. The minimum size of a valid Edid buffer is 128 bytes.
  EDID information is defined in the E-DID EEPROM
  specification published by VESA (www.vesa.org).
**/
typedef struct {
  UINT32   SizeOfEdid;
  UINT8    *Edid;
} EFI_EDID_ACTIVE_PROTOCOL;

extern EFI_GUID gEfiEdidActiveProtocolGuid;

#endif