update bootcmd to remove sleep if necessary

on update/install

skeleton/miyoo/app/MainUI

@@ -6,6 +6,22 @@ DIR=/mnt/SDCARD/miyoo/app
 cd "$DIR"
 
 export LD_LIBRARY_PATH=/lib:/config/lib:/customer/lib
+
+# update bootcmd if necessary
+contains() { [ -z "${2##*$1*}" ]; }
+MIYOO_VERSION=`/etc/fw_printenv miyoo_version`
+MIYOO_VERSION=${MIYOO_VERSION#miyoo_version=}
+SUPPORTED_VERSION="202205010000" # date after latest known version
+if [ $MIYOO_VERSION -lt $SUPPORTED_VERSION ]; then
+	OLD_CMD=`/etc/fw_printenv bootcmd`
+	NEW_CMD="gpio output 85 1; bootlogo 0 0 0 0 0; mw 1f001cc0 11; gpio out 8 0; sf probe 0;sf read 0x22000000 \${sf_kernel_start} \${sf_kernel_size}; gpio out 8 1; gpio output 4 1; bootm 0x22000000"
+	if contains "sleepms" "$OLD_CMD"; then
+		./say "Updating bootcmd"
+		/etc/fw_setenv bootcmd $NEW_CMD
+		sleep 1
+	fi
+fi
+
 SYSTEM_PATH=/mnt/SDCARD/.system
 OLD_SYSTEM_PATH=/mnt/SDCARD/.system_old
 
@@ -23,6 +39,7 @@ else
 fi
 
 # then do it
+./blank
 ./say "$VERB MiniUI"
 unzip -o "/mnt/SDCARD/miyoo/app/MiniUI.zip" -d "/mnt/SDCARD"