MdePkg/Include/Protocol/EdidActive.h

   1 /** @file
   2   EDID Active Protocol from the UEFI 2.0 specification.
   3
   4   Placed on the video output device child handle that is actively displaying output.
   5
   6   Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
   7   This program and the accompanying materials
   8   are licensed and made available under the terms and conditions of the BSD License
   9   which accompanies this distribution.  The full text of the license may be found at
  10   http://opensource.org/licenses/bsd-license.php
  11
  12   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14
  15 **/
  16
  17 #ifndef __EDID_ACTIVE_H__
  18 #define __EDID_ACTIVE_H__
  19
  20 #define EFI_EDID_ACTIVE_PROTOCOL_GUID \
  21   { \
  22     0xbd8c1056, 0x9f36, 0x44ec, {0x92, 0xa8, 0xa6, 0x33, 0x7f, 0x81, 0x79, 0x86 } \
  23   }
  24
  25 ///
  26 /// This protocol contains the EDID information for an active video output device. This is either the
  27 /// EDID information retrieved from the EFI_EDID_OVERRIDE_PROTOCOL if an override is
  28 /// available, or an identical copy of the EDID information from the
  29 /// EFI_EDID_DISCOVERED_PROTOCOL if no overrides are available.
  30 ///
  31 typedef struct {
  32   ///
  33   /// The size, in bytes, of the Edid buffer. 0 if no EDID information
  34   /// is available from the video output device. Otherwise, it must be a
  35   /// minimum of 128 bytes.
  36   ///
  37   UINT32   SizeOfEdid;
  38
  39   ///
  40   /// A pointer to a read-only array of bytes that contains the EDID
  41   /// information for an active video output device. This pointer is
  42   /// NULL if no EDID information is available for the video output
  43   /// device. The minimum size of a valid Edid buffer is 128 bytes.
  44   /// EDID information is defined in the E-DID EEPROM
  45   /// specification published by VESA (www.vesa.org).
  46   ///
  47   UINT8    *Edid;
  48 } EFI_EDID_ACTIVE_PROTOCOL;
  49
  50 extern EFI_GUID gEfiEdidActiveProtocolGuid;
  51
  52 #endif