edid-decode: add VTB-Ext support

Support the VTB-Ext standard.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

1 files changed, 31 insertions, 0 deletions

diff --git a/parse-vtb-ext-block.cpp b/parse-vtb-ext-block.cpp
new file mode 100644
index 0000000..119fc7d
--- /dev/null
+++ b/parse-vtb-ext-block.cpp
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2019 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("%s Version %u\n", block.c_str(), x[1]);
+	if (x[1] != 1)
+		fail("Invalid version %u\n", x[1]);
+
+	unsigned num_dtb = x[2];
+	unsigned num_cvt = x[3];
+	unsigned num_st = x[4];
+
+	x += 5;
+	for (unsigned i = 0; i < num_dtb; i++, x += 18)
+		detailed_timings("    ", x);
+	for (unsigned i = 0; i < num_cvt; i++, x += 3)
+		detailed_cvt_descriptor("    ", x, false);
+	for (unsigned i = 0; i < num_st; i++, x += 2) {
+		if ((x[1] & 0x3f) >= 60)
+			print_standard_timing("    ", x[0], x[1] - 60, true);
+		else
+			print_standard_timing("    ", x[0], x[1], true, 0);
+	}
+}