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 are actively displaying output.
   5
   6   Copyright (c) 2006 - 2008, Intel Corporation
   7   All rights reserved. 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   @par Protocol Description:
  27   This protocol contains the EDID information for an active video output device. This is either the
  28   EDID information retrieved from the EFI_EDID_OVERRIDE_PROTOCOL if an override is
  29   available, or an identical copy of the EDID information from the
  30   EFI_EDID_DISCOVERED_PROTOCOL if no overrides are available.
  31
  32   @param SizeOfEdid
  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   @param Edid
  38   A pointer to a read-only array of bytes that contains the EDID
  39   information for an active video output device. This pointer is
  40   NULL if no EDID information is available for the video output
  41   device. The minimum size of a valid Edid buffer is 128 bytes.
  42   EDID information is defined in the E-DID EEPROM
  43   specification published by VESA (www.vesa.org).
  44 **/
  45 typedef struct {
  46   UINT32   SizeOfEdid;
  47   UINT8    *Edid;
  48 } EFI_EDID_ACTIVE_PROTOCOL;
  49
  50 extern EFI_GUID gEfiEdidActiveProtocolGuid;
  51
  52 #endif