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 } \
  }

///
/// 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.
///
typedef struct {
  ///
  /// 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.
  ///
  UINT32   SizeOfEdid;

  ///
  /// 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).
  ///
  UINT8    *Edid;
} EFI_EDID_ACTIVE_PROTOCOL;

extern EFI_GUID gEfiEdidActiveProtocolGuid;

#endif