From a276aa76d6ef0bd16d72e5f945314816529bf064 Mon Sep 17 00:00:00 2001
From: Maxim Devaev <mdevaev@gmail.com>
Date: Sat, 6 Apr 2024 23:51:41 +0300
Subject: [PATCH] v4plus: config.txt for passthrough

---
 configs/os/boot-config/v4plus-hdmi-rpi4.txt | 4 ++++
 kvmd.install                                | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/configs/os/boot-config/v4plus-hdmi-rpi4.txt b/configs/os/boot-config/v4plus-hdmi-rpi4.txt
index 3728ab39..05821ea4 100644
--- a/configs/os/boot-config/v4plus-hdmi-rpi4.txt
+++ b/configs/os/boot-config/v4plus-hdmi-rpi4.txt
@@ -23,3 +23,7 @@ dtparam=i2c_arm=on
 
 # Clock
 dtoverlay=i2c-rtc,pcf8563,wakeup-source
+
+# Passthrough
+dtoverlay=vc4-kms-v3d
+disable_overscan=1
diff --git a/kvmd.install b/kvmd.install
index a97b799d..e57d03c7 100644
--- a/kvmd.install
+++ b/kvmd.install
@@ -83,6 +83,15 @@ post_upgrade() {
 			keyboxd@etc-pacman.d-gnupg.socket
 	fi
 
+	if [[ "$(varcmp "$2" 3.331)" -lt 0 ]]; then
+		grep -q "^dtoverlay=vc4-kms-v3d" /boot/config.txt || cat << EOF >> /boot/config.txt
+
+# Passthrough
+dtoverlay=vc4-kms-v3d
+disable_overscan=1
+EOF
+	fi
+
 	# Some update deletes /etc/motd, WTF
 	# shellcheck disable=SC2015,SC2166
 	[ ! -f /etc/motd -a -f /etc/motd.pacsave ] && mv /etc/motd.pacsave /etc/motd || true