MdePkg/Include/Protocol/EdidOverride.h

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

  Allow platform to provide EDID information to the producer of the Graphics Output
  protocol.

  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef __EDID_OVERRIDE_H__
#define __EDID_OVERRIDE_H__

#define EFI_EDID_OVERRIDE_PROTOCOL_GUID \
  { \
    0x48ecb431, 0xfb72, 0x45c0, {0xa9, 0x22, 0xf4, 0x58, 0xfe, 0x4, 0xb, 0xd5 } \
  }

typedef struct _EFI_EDID_OVERRIDE_PROTOCOL EFI_EDID_OVERRIDE_PROTOCOL;

#define EFI_EDID_OVERRIDE_DONT_OVERRIDE    0x01
#define EFI_EDID_OVERRIDE_ENABLE_HOT_PLUG  0x02

/**
  Returns policy information and potentially a replacement EDID for the specified video output device.

  @param  This              The EFI_EDID_OVERRIDE_PROTOCOL instance.
  @param  ChildHandle       A child handle produced by the Graphics Output EFI
                            driver that represents a video output device.
  @param  Attributes        The attributes associated with ChildHandle video output device.
  @param  EdidSize          A pointer to the size, in bytes, of the Edid buffer.
  @param  Edid              A pointer to callee allocated buffer that contains the EDID that
                            should be used for ChildHandle. A value of NULL
                            represents no EDID override for ChildHandle.

  @retval EFI_SUCCESS       Valid overrides returned for ChildHandle.
  @retval EFI_UNSUPPORTED   ChildHandle has no overrides.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_EDID_OVERRIDE_PROTOCOL_GET_EDID)(
  IN  EFI_EDID_OVERRIDE_PROTOCOL          *This,
  IN  EFI_HANDLE                          *ChildHandle,
  OUT UINT32                              *Attributes,
  OUT UINTN                               *EdidSize,
  OUT UINT8                               **Edid
  );

///
/// This protocol is produced by the platform to allow the platform to provide
/// EDID information to the producer of the Graphics Output protocol.
///
struct _EFI_EDID_OVERRIDE_PROTOCOL {
  EFI_EDID_OVERRIDE_PROTOCOL_GET_EDID    GetEdid;
};

extern EFI_GUID  gEfiEdidOverrideProtocolGuid;

#endif