| 1 | #!/usr/bin/perl -w |
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| 2 | # |
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| 3 | # Copyright (C) 2004-2005 Jean Delvare <khali@linux-fr.org> |
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| 4 | # |
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| 5 | # Parts inspired from decode-edid. |
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| 6 | # Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org> |
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| 7 | # |
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| 8 | # Parts inspired from the ddcmon driver and sensors' print_ddcmon function. |
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| 9 | # Copyright (C) 1998-2004 Mark D. Studebaker |
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| 10 | # |
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| 11 | # Parts inspired from the fbmon driver (Linux 2.6.10). |
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| 12 | # Copyright (C) 2002 James Simmons <jsimmons@users.sf.net> |
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| 13 | # |
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| 14 | # This program is free software; you can redistribute it and/or modify |
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| 15 | # it under the terms of the GNU General Public License as published by |
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| 16 | # the Free Software Foundation; either version 2 of the License, or |
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| 17 | # (at your option) any later version. |
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| 18 | # |
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| 19 | # This program is distributed in the hope that it will be useful, |
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| 20 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 21 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 22 | # GNU General Public License for more details. |
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| 23 | # |
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| 24 | # You should have received a copy of the GNU General Public License |
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| 25 | # along with this program; if not, write to the Free Software |
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| 26 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
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| 27 | # MA 02110-1301 USA. |
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| 28 | # |
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| 29 | # Version 1.0 2005-01-04 Jean Delvare <khali@linux-fr.org> |
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| 30 | # |
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| 31 | # This script is a replacement for the now deprecated ddcmon kernel driver. |
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| 32 | # Instead of having a dedicated driver, it is better to reuse the standard |
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| 33 | # eeprom driver and implement the EDID-specific code in user-space. |
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| 34 | # |
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| 35 | # EDID (Extended Display Identification Data) is a VESA standard which |
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| 36 | # allows storing (on manufacturer's side) and retrieving (on user's side) |
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| 37 | # of configuration information about displays, such as manufacturer, |
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| 38 | # serial number, physical dimensions and allowed horizontal and vertical |
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| 39 | # refresh rates. |
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| 40 | # |
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| 41 | # Syntax: ddcmon [bus [address]] |
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| 42 | # Address can be given in decimal or hexadecimal (with a 0x prefix). |
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| 43 | # If no address is given, default is 0x50. |
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| 44 | # Bus number must be given in decimal. If no bus number is given, |
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| 45 | # try them all. |
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| 46 | |
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| 47 | use strict; |
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| 48 | use Fcntl qw(:DEFAULT :seek); |
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| 49 | use vars qw(@standard_scales); |
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| 50 | |
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| 51 | @standard_scales = ([1, 1], [3, 4], [4, 5], [16, 9]); |
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| 52 | |
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| 53 | # Make sure the eeprom module is loaded. |
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| 54 | # For non-modular kernels, we can't help. |
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| 55 | if (-r '/proc/modules') |
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| 56 | { |
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| 57 | my $found = 0; |
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| 58 | open(MODULES, '/proc/modules'); |
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| 59 | while (!$found && defined ($_ = <MODULES>)) |
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| 60 | { |
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| 61 | $found++ if m/^eeprom\s+/; |
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| 62 | } |
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| 63 | close(MODULES); |
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| 64 | |
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| 65 | unless ($found) |
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| 66 | { |
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| 67 | print STDERR |
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| 68 | "This script requires the eeprom module to be loaded.\n"; |
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| 69 | exit 1; |
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| 70 | } |
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| 71 | } |
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| 72 | |
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| 73 | # Only used for sysfs |
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| 74 | sub rawread |
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| 75 | { |
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| 76 | my $filename = shift; |
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| 77 | my $length = shift; |
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| 78 | my $offset = shift || 0; |
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| 79 | my $bytes = ''; |
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| 80 | |
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| 81 | sysopen(FH, $filename, O_RDONLY) |
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| 82 | or die "Can't open $filename"; |
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| 83 | if ($offset) |
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| 84 | { |
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| 85 | sysseek(FH, $offset, SEEK_SET) |
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| 86 | or die "Can't seek in $filename"; |
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| 87 | } |
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| 88 | |
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| 89 | $offset = 0; |
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| 90 | while ($length) |
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| 91 | { |
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| 92 | my $r = sysread(FH, $bytes, $length, $offset); |
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| 93 | die "Can't read $filename" |
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| 94 | unless defined($r); |
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| 95 | die "Unexpected EOF in $filename" |
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| 96 | unless $r; |
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| 97 | $offset += $r; |
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| 98 | $length -= $r; |
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| 99 | } |
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| 100 | close(FH); |
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| 101 | |
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| 102 | return $bytes; |
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| 103 | } |
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| 104 | |
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| 105 | sub get_edid_sysfs |
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| 106 | { |
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| 107 | my ($bus, $addr) = @_; |
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| 108 | |
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| 109 | my @bytes = unpack("C*", rawread("/sys/bus/i2c/devices/$bus-00$addr/eeprom", 128)); |
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| 110 | |
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| 111 | return \@bytes; |
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| 112 | } |
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| 113 | |
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| 114 | sub get_edid_procfs |
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| 115 | { |
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| 116 | my ($bus, $addr) = @_; |
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| 117 | |
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| 118 | my @bytes; |
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| 119 | |
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| 120 | for (my $i = 0 ; $i < 0x80; $i += 0x10) |
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| 121 | { |
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| 122 | my $filename = sprintf("/proc/sys/dev/sensors/eeprom-i2c-\%s-\%s/\%02x", |
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| 123 | $bus, $addr, $i); |
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| 124 | open(EEDATA, $filename) |
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| 125 | or die "Can't read $filename"; |
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| 126 | push @bytes, split(/\s+/, <EEDATA>); |
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| 127 | close(EEDATA); |
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| 128 | } |
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| 129 | |
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| 130 | return \@bytes; |
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| 131 | } |
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| 132 | |
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| 133 | sub print_line |
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| 134 | { |
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| 135 | my $label = shift; |
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| 136 | my $pattern = shift; |
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| 137 | |
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| 138 | printf("\%-24s$pattern\n", $label.':', @_); |
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| 139 | } |
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| 140 | |
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| 141 | sub extract_byte |
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| 142 | { |
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| 143 | my ($bytes, $offset) = @_; |
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| 144 | |
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| 145 | return $bytes->[$offset]; |
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| 146 | } |
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| 147 | |
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| 148 | sub extract_word |
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| 149 | { |
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| 150 | my ($bytes, $offset) = @_; |
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| 151 | |
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| 152 | return ($bytes->[$offset] |
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| 153 | | ($bytes->[$offset+1] << 8)); |
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| 154 | } |
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| 155 | |
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| 156 | sub extract_manufacturer |
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| 157 | { |
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| 158 | my ($bytes, $offset) = @_; |
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| 159 | my $i = ($bytes->[$offset+1] | ($bytes->[$offset] << 8)); |
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| 160 | |
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| 161 | return sprintf('%c%c%c', |
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| 162 | (($i >> 10) & 0x1f) + ord('A') - 1, |
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| 163 | (($i >> 5) & 0x1f) + ord('A') - 1, |
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| 164 | ($i & 0x1f) + ord('A') - 1); |
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| 165 | } |
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| 166 | |
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| 167 | sub extract_sesquiword |
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| 168 | { |
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| 169 | my ($bytes, $offset) = @_; |
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| 170 | |
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| 171 | return ($bytes->[$offset] |
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| 172 | | ($bytes->[$offset+1] << 8) |
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| 173 | | ($bytes->[$offset+2] << 16)); |
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| 174 | } |
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| 175 | |
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| 176 | sub extract_dword |
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| 177 | { |
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| 178 | my ($bytes, $offset) = @_; |
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| 179 | |
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| 180 | return ($bytes->[$offset] |
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| 181 | | ($bytes->[$offset+1] << 8) |
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| 182 | | ($bytes->[$offset+2] << 16) |
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| 183 | | ($bytes->[$offset+3] << 24)); |
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| 184 | } |
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| 185 | |
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| 186 | sub extract_display_input |
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| 187 | { |
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| 188 | my ($bytes, $offset) = @_; |
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| 189 | |
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| 190 | my @voltage = ('0.700V/0.300V', '0.714V/0.286V', |
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| 191 | '1.000V/0.400V', '0.700V/0.000V'); |
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| 192 | |
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| 193 | return 'Digital' |
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| 194 | if ($bytes->[$offset] & 0x80); |
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| 195 | |
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| 196 | return 'Analog ('.$voltage[($bytes->[$offset] & 0x60) >> 5].')'; |
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| 197 | } |
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| 198 | |
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| 199 | sub extract_dpms |
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| 200 | { |
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| 201 | my ($bytes, $offset) = @_; |
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| 202 | |
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| 203 | my @supported; |
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| 204 | |
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| 205 | push @supported, 'Active Off' if ($bytes->[$offset] & 0x20); |
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| 206 | push @supported, 'Suspend' if ($bytes->[$offset] & 0x40); |
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| 207 | push @supported, 'Standby' if ($bytes->[$offset] & 0x80); |
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| 208 | |
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| 209 | return join(', ', @supported) |
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| 210 | if (@supported); |
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| 211 | |
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| 212 | return 'None supported'; |
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| 213 | } |
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| 214 | |
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| 215 | sub extract_color_mode |
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| 216 | { |
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| 217 | my ($bytes, $offset) = @_; |
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| 218 | |
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| 219 | my @mode = ('Monochrome', 'RGB Multicolor', 'Non-RGB Multicolor'); |
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| 220 | |
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| 221 | return $mode[($bytes->[$offset] >> 3) & 0x03]; |
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| 222 | } |
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| 223 | |
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| 224 | sub good_signature |
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| 225 | { |
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| 226 | my $bytes = shift; |
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| 227 | |
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| 228 | return $bytes->[0] == 0x00 |
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| 229 | && $bytes->[1] == 0xff |
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| 230 | && $bytes->[2] == 0xff |
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| 231 | && $bytes->[3] == 0xff |
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| 232 | && $bytes->[4] == 0xff |
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| 233 | && $bytes->[5] == 0xff |
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| 234 | && $bytes->[6] == 0xff |
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| 235 | && $bytes->[7] == 0x00; |
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| 236 | } |
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| 237 | |
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| 238 | sub verify_checksum |
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| 239 | { |
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| 240 | my $bytes = shift; |
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| 241 | my $cs; |
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| 242 | |
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| 243 | for (my $i = 0, $cs = 0; $i < 0x80; $i++) |
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| 244 | { |
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| 245 | $cs += $bytes->[$i]; |
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| 246 | } |
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| 247 | |
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| 248 | return (($cs & 0xff) == 0 ? 'OK' : 'Not OK'); |
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| 249 | } |
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| 250 | |
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| 251 | sub add_timing |
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| 252 | { |
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| 253 | my ($timings, $new) = @_; |
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| 254 | |
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| 255 | my $mode = sprintf('%ux%u@%u%s', $new->[0], $new->[1], |
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| 256 | $new->[2], defined ($new->[3]) && |
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| 257 | $new->[3] eq 'interlaced' ? 'i' : ''); |
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| 258 | |
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| 259 | $timings->{$mode} = $new; |
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| 260 | } |
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| 261 | |
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| 262 | sub add_standard_timing |
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| 263 | { |
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| 264 | my ($timings, $byte0, $byte1) = @_; |
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| 265 | |
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| 266 | # Unused slot |
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| 267 | return if ($byte0 == $byte1) |
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| 268 | && ($byte0 == 0x01 || $byte0 == 0x00 || $byte0 == 0x20); |
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| 269 | |
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| 270 | my $width = ($byte0 + 31) * 8; |
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| 271 | my $height = $width * $standard_scales[$byte1 >> 6]->[0] |
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| 272 | / $standard_scales[$byte1 >> 6]->[1]; |
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| 273 | my $refresh = 60 + ($byte1 & 0x3f); |
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| 274 | |
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| 275 | add_timing($timings, [$width, $height, $refresh]); |
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| 276 | } |
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| 277 | |
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| 278 | sub sort_timings |
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| 279 | { |
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| 280 | # First order by width |
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| 281 | return -1 if $a->[0] < $b->[0]; |
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| 282 | return 1 if $a->[0] > $b->[0]; |
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| 283 | |
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| 284 | # Second by height |
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| 285 | return -1 if $a->[1] < $b->[1]; |
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| 286 | return 1 if $a->[1] > $b->[1]; |
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| 287 | |
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| 288 | # Third by frequency |
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| 289 | # Interlaced modes count for half their frequency |
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| 290 | my $freq_a = $a->[2]; |
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| 291 | my $freq_b = $b->[2]; |
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| 292 | $freq_a /= 2 if defined $a->[3] && $a->[3] eq 'interlaced'; |
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| 293 | $freq_b /= 2 if defined $b->[3] && $b->[3] eq 'interlaced'; |
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| 294 | return -1 if $freq_a < $freq_b; |
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| 295 | return 1 if $freq_a > $freq_b; |
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| 296 | |
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| 297 | return 0; |
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| 298 | } |
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| 299 | |
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| 300 | sub print_timings |
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| 301 | { |
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| 302 | my ($bytes, $timings) = @_; |
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| 303 | |
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| 304 | # Established Timings |
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| 305 | my @established = |
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| 306 | ( |
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| 307 | [720, 400, 70], |
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| 308 | [720, 400, 88], |
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| 309 | [640, 480, 60], |
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| 310 | [640, 480, 67], |
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| 311 | [640, 480, 72], |
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| 312 | [640, 480, 75], |
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| 313 | [800, 600, 56], |
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| 314 | [800, 600, 60], |
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| 315 | [800, 600, 72], |
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| 316 | [800, 600, 75], |
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| 317 | [832, 624, 75], |
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| 318 | [1024, 768, 87, 'interlaced'], |
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| 319 | [1024, 768, 60], |
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| 320 | [1024, 768, 70], |
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| 321 | [1024, 768, 75], |
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| 322 | [1280, 1024, 75], |
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| 323 | undef, undef, undef, |
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| 324 | [1152, 870, 75], |
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| 325 | ); |
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| 326 | my $temp = extract_sesquiword($bytes, 0x23); |
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| 327 | for (my $i = 0; $i < 24; $i++) |
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| 328 | { |
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| 329 | next unless defined($established[$i]); |
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| 330 | add_timing($timings, $established[$i]) |
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| 331 | if ($temp & (1 << $i)); |
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| 332 | } |
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| 333 | |
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| 334 | # Standard Timings |
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| 335 | for (my $i = 0x26; $i < 0x36; $i += 2) |
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| 336 | { |
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| 337 | add_standard_timing($timings, $bytes->[$i], $bytes->[$i+1]); |
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| 338 | } |
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| 339 | |
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| 340 | foreach my $v (sort sort_timings values(%{$timings})) |
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| 341 | { |
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| 342 | print_line("Timing", '%ux%u @ %u Hz%s', |
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| 343 | $v->[0], $v->[1], $v->[2], |
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| 344 | defined($v->[3]) ? ' ('.$v->[3].')' : ''); |
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| 345 | } |
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| 346 | } |
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| 347 | |
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| 348 | sub extract_string |
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| 349 | { |
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| 350 | my ($bytes, $offset) = @_; |
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| 351 | my $string = ''; |
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| 352 | |
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| 353 | for (my $i = 5; $i < 18; $i++) |
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| 354 | { |
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| 355 | last if $bytes->[$offset+$i] == 0x0a |
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| 356 | || $bytes->[$offset+$i] == 0x00; |
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| 357 | $string .= chr($bytes->[$offset+$i]) |
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| 358 | if ($bytes->[$offset+$i] >= 32 |
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| 359 | && $bytes->[$offset+$i] < 127); |
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| 360 | } |
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| 361 | $string =~ s/\s+$//; |
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| 362 | |
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| 363 | return $string; |
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| 364 | } |
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| 365 | |
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| 366 | # Some blocks contain different information: |
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| 367 | # 0x00, 0x00, 0x00, 0xfa: Additional standard timings block |
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| 368 | # 0x00, 0x00, 0x00, 0xfc: Monitor block |
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| 369 | # 0x00, 0x00, 0x00, 0xfd: Limits block |
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| 370 | # 0x00, 0x00, 0x00, 0xfe: Ascii block |
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| 371 | # 0x00, 0x00, 0x00, 0xff: Serial block |
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| 372 | # Return a reference to a hash containing all information. |
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| 373 | sub extract_detailed_timings |
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| 374 | { |
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| 375 | my ($bytes) = @_; |
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| 376 | |
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| 377 | my %info = ('timings' => {}); |
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| 378 | |
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| 379 | for (my $offset = 0x36; $offset < 0x7e; $offset += 18) |
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| 380 | { |
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| 381 | if ($bytes->[$offset] == 0x00 |
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| 382 | && $bytes->[$offset+1] == 0x00 |
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| 383 | && $bytes->[$offset+2] == 0x00 |
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| 384 | && $bytes->[$offset+4] == 0x00) |
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| 385 | { |
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| 386 | if ($bytes->[$offset+3] == 0xfa) |
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| 387 | { |
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| 388 | for (my $i = $offset + 5; $i < $offset + 17; $i += 2) |
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| 389 | { |
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| 390 | add_standard_timing($info{'timings'}, |
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| 391 | $bytes->[$i], |
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| 392 | $bytes->[$i+1]); |
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| 393 | } |
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| 394 | } |
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| 395 | |
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| 396 | elsif ($bytes->[$offset+3] == 0xfc) |
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| 397 | { |
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| 398 | $info{'monitor'} .= extract_string($bytes, $offset); |
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| 399 | } |
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| 400 | |
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| 401 | elsif ($bytes->[$offset+3] == 0xfd) |
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| 402 | { |
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| 403 | $info{'limits'}{'vsync_min'} = $bytes->[$offset+5]; |
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| 404 | $info{'limits'}{'vsync_max'} = $bytes->[$offset+6]; |
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| 405 | $info{'limits'}{'hsync_min'} = $bytes->[$offset+7]; |
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| 406 | $info{'limits'}{'hsync_max'} = $bytes->[$offset+8]; |
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| 407 | $info{'limits'}{'clock_max'} = $bytes->[$offset+9]; |
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| 408 | } |
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| 409 | |
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| 410 | elsif ($bytes->[$offset+3] == 0xfe) |
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| 411 | { |
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| 412 | $info{'ascii'} .= extract_string($bytes, $offset); |
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| 413 | } |
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| 414 | |
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| 415 | elsif ($bytes->[$offset+3] == 0xff) |
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| 416 | { |
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| 417 | $info{'serial'} .= extract_string($bytes, $offset); |
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| 418 | } |
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| 419 | |
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| 420 | next; |
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| 421 | } |
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| 422 | |
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| 423 | # Detailed Timing |
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| 424 | my $width = $bytes->[$offset+2] + (($bytes->[$offset+4] & 0xf0) << 4); |
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| 425 | my $height = $bytes->[$offset+5] + (($bytes->[$offset+7] & 0xf0) << 4); |
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| 426 | my $clock = extract_word($bytes, $offset) * 10000; |
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| 427 | my $hblank = $bytes->[$offset+3] + (($bytes->[$offset+4] & 0x0f) << 8); |
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| 428 | my $vblank = $bytes->[$offset+6] + (($bytes->[$offset+7] & 0x0f) << 8); |
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| 429 | my $area = ($width + $hblank) * ($height + $vblank); |
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| 430 | next unless $area; # Should not happen, but... |
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| 431 | my $refresh = ($clock + $area / 2) / $area; # Proper rounding |
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| 432 | add_timing($info{'timings'}, [$width, $height, $refresh]); |
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| 433 | } |
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| 434 | |
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| 435 | return \%info; |
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| 436 | } |
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| 437 | |
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| 438 | sub print_edid |
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| 439 | { |
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| 440 | my ($bus, $address) = @_; |
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| 441 | my $bytes; |
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| 442 | |
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| 443 | if (-r "/sys/bus/i2c/devices/$bus-00$address/eeprom") |
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| 444 | { |
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| 445 | $bytes = get_edid_sysfs($bus, $address); |
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| 446 | } |
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| 447 | elsif (-r "/proc/sys/dev/sensors/eeprom-i2c-$bus-$address/00") |
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| 448 | { |
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| 449 | $bytes = get_edid_procfs($bus, $address); |
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| 450 | } |
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| 451 | |
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| 452 | return 1 unless defined $bytes; |
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| 453 | return 2 unless good_signature($bytes); |
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| 454 | |
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| 455 | print_line('Checksum', '%s', verify_checksum($bytes)); |
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| 456 | my $edid_version = extract_byte($bytes, 0x12); |
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| 457 | my $edid_revision = extract_byte($bytes, 0x13); |
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| 458 | print_line('EDID Version', '%u.%u', $edid_version, |
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| 459 | $edid_revision); |
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| 460 | if ($edid_version > 1 || $edid_revision > 2) |
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| 461 | { |
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| 462 | $standard_scales[0][0] = 16; |
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| 463 | $standard_scales[0][1] = 10; |
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| 464 | } |
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| 465 | else |
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| 466 | { |
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| 467 | $standard_scales[0][0] = 1; |
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| 468 | $standard_scales[0][1] = 1; |
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| 469 | } |
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| 470 | |
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| 471 | my $info = extract_detailed_timings($bytes); |
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| 472 | |
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| 473 | print_line('Manufacturer ID', '%s', extract_manufacturer($bytes, 0x08)); |
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| 474 | print_line('Model Number', '0x%04X', extract_word($bytes, 0x0A)); |
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| 475 | print_line('Model Name', '%s', $info->{'monitor'}) |
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| 476 | if defined $info->{'monitor'}; |
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| 477 | |
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| 478 | if ($info->{'serial'}) |
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| 479 | { |
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| 480 | print_line('Serial Number', '%s', $info->{'serial'}) |
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| 481 | } |
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| 482 | elsif ((my $temp = extract_dword($bytes, 0x0C))) |
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| 483 | { |
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| 484 | print_line('Serial Number', '%u', $temp) |
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| 485 | } |
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| 486 | |
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| 487 | print_line('Manufacture Time', '%u-W%02u', |
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| 488 | 1990 + extract_byte($bytes, 0x11), |
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| 489 | extract_byte($bytes, 0x10)); |
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| 490 | print_line('Display Input', '%s', extract_display_input($bytes, 0x14)); |
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| 491 | print_line('Monitor Size (cm)', '%ux%u', extract_byte($bytes, 0x15), |
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| 492 | extract_byte($bytes, 0x16)); |
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| 493 | print_line('Gamma Factor', '%.2f', |
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| 494 | 1 + extract_byte($bytes, 0x17) / 100.0); |
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| 495 | print_line('DPMS Modes', '%s', extract_dpms($bytes, 0x18)); |
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| 496 | print_line('Color Mode', '%s', extract_color_mode($bytes, 0x18)) |
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| 497 | if (($bytes->[0x18] & 0x18) != 0x18); |
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| 498 | print_line('Additional Info', '%s', $info->{'ascii'}) |
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| 499 | if $info->{'ascii'}; |
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| 500 | |
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| 501 | if (defined($info->{'limits'})) |
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| 502 | { |
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| 503 | print_line('Vertical Sync (Hz)', '%u-%u', |
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| 504 | $info->{'limits'}{'vsync_min'}, |
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| 505 | $info->{'limits'}{'vsync_max'}); |
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| 506 | print_line('Horizontal Sync (kHz)', '%u-%u', |
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| 507 | $info->{'limits'}{'hsync_min'}, |
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| 508 | $info->{'limits'}{'hsync_max'}); |
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| 509 | print_line('Max Pixel Clock (MHz)', '%u', |
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| 510 | $info->{'limits'}{'clock_max'} * 10) |
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| 511 | unless $info->{'limits'}{'clock_max'} == 0xff; |
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| 512 | } |
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| 513 | |
|---|
| 514 | print_timings($bytes, $info->{'timings'}); |
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| 515 | print("\n"); |
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| 516 | return 0; |
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| 517 | } |
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| 518 | |
|---|
| 519 | # Get the address. Default to 0x50 if not given. |
|---|
| 520 | my $address; |
|---|
| 521 | if (defined($ARGV[1])) |
|---|
| 522 | { |
|---|
| 523 | $address = $ARGV[1]; |
|---|
| 524 | # Convert to decimal, whatever the value. |
|---|
| 525 | $address = oct $address if $address =~ m/^0/; |
|---|
| 526 | # Convert to an hexadecimal string. |
|---|
| 527 | $address = sprintf '%02x', $address; |
|---|
| 528 | } |
|---|
| 529 | else |
|---|
| 530 | { |
|---|
| 531 | $address = '50'; |
|---|
| 532 | } |
|---|
| 533 | |
|---|
| 534 | if (defined($ARGV[0])) |
|---|
| 535 | { |
|---|
| 536 | my $error = print_edid($ARGV[0], $address); |
|---|
| 537 | |
|---|
| 538 | if ($error == 1) |
|---|
| 539 | { |
|---|
| 540 | print STDERR |
|---|
| 541 | "No EEPROM found at 0x$address on bus $ARGV[0].\n"; |
|---|
| 542 | exit 1; |
|---|
| 543 | } |
|---|
| 544 | elsif ($error == 2) |
|---|
| 545 | { |
|---|
| 546 | print STDERR |
|---|
| 547 | "EEPROM found at 0x$address on bus $ARGV[0], but is not an EDID EEPROM.\n"; |
|---|
| 548 | exit 1; |
|---|
| 549 | } |
|---|
| 550 | } |
|---|
| 551 | # If no bus is given, try them all. |
|---|
| 552 | else |
|---|
| 553 | { |
|---|
| 554 | my $total = 0; |
|---|
| 555 | |
|---|
| 556 | for (my $i = 0; $i < 16; $i++) |
|---|
| 557 | { |
|---|
| 558 | $total++ unless print_edid($i, $address); |
|---|
| 559 | } |
|---|
| 560 | |
|---|
| 561 | unless ($total) |
|---|
| 562 | { |
|---|
| 563 | print STDERR |
|---|
| 564 | "No EDID EEPROM found.\n"; |
|---|
| 565 | exit 1; |
|---|
| 566 | } |
|---|
| 567 | } |
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