From 43cb77c7b625ff65de4e50794837c551ba6387a6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Mon, 20 Jun 2022 12:01:21 +0200
Subject: [PATCH] doc: minor, add interface information

---
 README.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 243b297..99613ab 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,9 @@ If the monitor is not able to detect the connected device, then turn it back on.
 mode of operation
 =================
 
-To protect the monitor, the HDMI firewall only forwards the signal lines used for audio/video data transfer (D0, D1, D2, CK).
+To protect the monitor, the HDMI firewall only forwards the signal lines used for audio/video (A/V) data transfer (D0, D1, D2, CK).
 All other signal lines are unconnected (CEC, SDA, SCL, utility/HEAC+, HPD).
+This will block all non A/V interfaces (e.g. DDC, HPD, CEC, HEAC, MHL)
 The SDA/SCL lines used for the DDC interface to provide the EDID information to the device are connected to an EEPROM on the firewall.
 This is where you need to copy the monitor information to.
+This limits the DDC interface to the EDID information.