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 - 2018, Intel Corporation. All rights reserved.<BR>
   7   SPDX-License-Identifier: BSD-2-Clause-Patent
   8
   9 **/
  10
  11 #ifndef __EDID_ACTIVE_H__
  12 #define __EDID_ACTIVE_H__
  13
  14 #define EFI_EDID_ACTIVE_PROTOCOL_GUID \
  15   { \
  16     0xbd8c1056, 0x9f36, 0x44ec, {0x92, 0xa8, 0xa6, 0x33, 0x7f, 0x81, 0x79, 0x86 } \
  17   }
  18
  19 ///
  20 /// This protocol contains the EDID information for an active video output device. This is either the
  21 /// EDID information retrieved from the EFI_EDID_OVERRIDE_PROTOCOL if an override is
  22 /// available, or an identical copy of the EDID information from the
  23 /// EFI_EDID_DISCOVERED_PROTOCOL if no overrides are available.
  24 ///
  25 typedef struct {
  26   ///
  27   /// The size, in bytes, of the Edid buffer. 0 if no EDID information
  28   /// is available from the video output device. Otherwise, it must be a
  29   /// minimum of 128 bytes.
  30   ///
  31   UINT32    SizeOfEdid;
  32
  33   ///
  34   /// A pointer to a read-only array of bytes that contains the EDID
  35   /// information for an active video output device. This pointer is
  36   /// NULL if no EDID information is available for the video output
  37   /// device. The minimum size of a valid Edid buffer is 128 bytes.
  38   /// EDID information is defined in the E-EDID EEPROM
  39   /// specification published by VESA (www.vesa.org).
  40   ///
  41   UINT8    *Edid;
  42 } EFI_EDID_ACTIVE_PROTOCOL;
  43
  44 extern EFI_GUID  gEfiEdidActiveProtocolGuid;
  45
  46 #endif