NAME

       edid-decode - Decode EDID data in human-readable format

SYNOPSIS

       edid-decode <options> [in [out]]

DESCRIPTION

       edid-decode  decodes  EDID  monitor description data in human-readable format.  If [in] is
       not given, or [in] is '-', then the EDID will be read from standard  input.  If  [out]  is
       given  then  the EDID that was read from [in] is written to [out] or to standard output if
       [out] is '-'. By default the output is written as a hex  dump  when  writing  to  standard
       output or a raw EDID if written to a file.

       If  [out]  is  given  then edid-decode only does the conversion, it will skip the decoding
       step.

       Input files may be raw binaries or ASCII text.  ASCII input  is  scanned  for  hex  dumps;
       heuristics  are  included  to search for hexdumps in edid-decode(1) output (as long as the
       initial hex dump was included), xrandr(1) property output and Xorg(1)  log  file  formats,
       otherwise the data is treated as a raw hexdump.  EDID blocks for connected monitors can be
       found in /sys/class/drm/*/edid on modern Linux systems with kernel modesetting support.

STANDARDS

       The following EDID standards are supported by edid-decode:

              EDID 1.3: VESA Enhanced Extended Display Identication  Data  Standard,  Release  A,
              Revision 1

              EDID  1.4:  VESA  Enhanced  Extended Display Identication Data Standard, Release A,
              Revision 2

              DisplayID 1.3: VESA Display Identification Data (DisplayID) Standard, Version 1.3

              DisplayID 2.0: VESA DisplayID Standard, Version 2.0

              DI-EXT: VESA Display Information Extension Block Standard, Release A

              LS-EXT: VESA Enhanced EDID Localized String Extension Standard, Release A

              VTB-EXT: VESA Video Timing Block Extension Data Standard, Release A

              HDMI 1.4b: High-Definition Multimedia Interface, Version 1.4b

              HDMI 2.1: High-Definition Multimedia Interface, Version 2.1

              HDMI 2.1: Amendment A1 to HDMI Specification Version 2.1

              CTA-861-G: A DTV Profile for Uncompressed High Speed Digital Interfaces

              SPWG Notebook Panel Specification, Version 3.5

              EPI Embedded Panel Interface, Revision 1.0

OPTIONS

       -h, --help
              Prints the help message.

       -o, --output-format=<fmt>
              If [out] is specified, then write the EDID in format <fmt>.
              The output format can be one of:
              hex: hex numbers in ascii text (default for stdout)
              raw: binary data (default unless writing to stdout)
              carray: c-program struct

       -c, --check
              Check if the EDID conforms to the standards. Warnings and failures are reported  at
              the end.

       -C, --check-inline
              Check  if the EDID conforms to the standards. Warnings and failures are reported as
              they happen.

       -s, --skip-hex-dump
              Skip the initial hex dump of the EDID.

       --skip-sha
              Don't show the SHA hash. Normally edid-decode will show the SHA, i.e. the  hash  of
              the git commit used to compile edid-decode. This uniquely identifies the version of
              edid-decode that is used to generate the warnings and failures. But  it  will  also
              change  the  output of edid-decode for every new commit in the git repository, even
              if nothing else changed in the  edid-decode  output.   Use  this  option  to  avoid
              including the SHA in the edid-decode output.

       -e, --extract
              Extract the contents of the first block in hex values.  This was always done in old
              edid-decode versions. To get the same behavior add this option.

NOTES

       Not all fields are decoded, or decoded completely.  Some fields' decoding  may  appear  to
       corrupt  the  output  (for  example,  detailed string sections have their contents printed
       literally).   edid-decode  does  attempt  to  validate  its  input  against  the  relevant
       standards,  but  its  opinions  have  not  been double-checked with the relevant standards
       bodies, so they may be wrong.  Do not rely on the output format, as it will likely  change
       in future versions of the tool as additional fields and extensions are added.

SEE ALSO

       Xorg(1), xrandr(1)

AUTHORS

       edid-decode  was  written  by  Adam  Jackson,  with contributions from Eric Anholt, Damien
       Lespiau, Hans Verkuil and others.  For  complete  history  and  the  latest  version,  see
       http://git.linuxtv.org/cgit.cgi/edid-decode.git

                                                                                   edid-decode(1)