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// SPDX-License-Identifier: MIT
/*
* Copyright 2019-2020 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* Author: Hans Verkuil <hverkuil-cisco@xs4all.nl>
*/
#include "edid-decode.h"
void edid_state::parse_vtb_ext_block(const unsigned char *x)
{
printf(" Version: %u\n", x[1]);
if (x[1] != 1)
fail("Invalid version %u.\n", x[1]);
unsigned num_dtd = x[2];
unsigned num_cvt = x[3];
unsigned num_st = x[4];
x += 5;
if (num_dtd) {
printf(" Detailed Timing Descriptors:\n");
for (unsigned i = 0; i < num_dtd; i++, x += 18)
detailed_timings(" ", x, false);
}
if (num_cvt) {
printf(" Coordinated Video Timings:\n");
for (unsigned i = 0; i < num_cvt; i++, x += 3)
detailed_cvt_descriptor(" ", x, false);
}
if (num_st) {
// Note: the VTB-EXT standard has a mistake in the example EDID
// that it provides: there the refresh rate (bits 5-0 of the
// second byte) is set to 60 for 60 Hz, but this should be 0
// since the actual refresh rate is the value + 60.
//
// The documentation itself is correct, though.
printf(" Standard Timings:\n");
for (unsigned i = 0; i < num_st; i++, x += 2)
print_standard_timing(" ", x[0], x[1], true);
}
}
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