Raspberry Pi 4 - /boot/config.txt

config.txt

dtparam=i2c=off
dtparam=i2s=off
dtparam=spi=off

dtparam=uart0=off
dtparam=uart1=off

dtparam=audio=off

dtoverlay=disable-wifi
dtoverlay=disable-bt
dtoverlay=novchiq

enable_gic=1
enable_uart=0

gpu_mem=16

start_x=0

arm_64bit=1

novchiq-overlay.dts

/dts-v1/;
/plugin/;

/ {
        compatible = "brcm,bcm2835";

        fragment@0 {
                target-path = "/soc/mailbox@7e00b840";
                __overlay__ {
                        status = "disabled";
                };
        };

        fragment@1 {
                target-path = "/soc/fb";
                __overlay__ {
                        status = "disabled";
                };
        };
};

novchiq-overlay.dts-old

/dts-v1/;
/plugin/;

/ {
	compatible = "brcm,bcm2835";

	fragment@0 {
		target-path = "/soc/mailbox@7e00b840";
		__overlay__ {
			status = "disabled";
		};
	};
};

script.sh

# dtc -@ -I dts -O dtb -o novchiq.dtbo novchiq-overlay.dts
# cp -f novchiq.dtbo /boot/overlays/