reform-display-config: add eMMC support

reform2-imx8mq/reform-tools_1.0-7/usr/sbin/reform-display-config

@@ -9,8 +9,18 @@ fi
 
 DTB="x"
 DTB_TARGET="imx8mq-mnt-reform2.dtb"
+CHOICE="$1"
+BOOTPART="mmcblk1p1"
+BOOTDISK="SD card"
 
-case "$1" in
+if [[ "--emmc" == "$1" ]]
+then
+    CHOICE="$2"
+    BOOTPART="mmcblk0p1"
+    BOOTDISK="eMMC"
+fi
+
+case "$CHOICE" in
 	dual) DTB="imx8mq-mnt-reform2-dual-display.dtb";;
 	single) DTB="imx8mq-mnt-reform2-single-display.dtb";;
 esac
@@ -18,12 +28,13 @@ esac
 if [[ "$DTB" == "x" ]]
 then
 	echo "Usage: "
-	echo "  reform-display-config dual      Select dual-display support (internal + HDMI)."
-	echo "  reform-display-config single    Select only internal display (turns off HDMI)."
+	echo "  reform-display-config dual                Select dual-display support (internal + HDMI)."
+	echo "  reform-display-config single              Select only internal display (turns off HDMI)."
+  echo "  reform-display-config --emmc dual|single  Record choice on eMMC."
 	exit
 fi
 
-MOUNTED_AT=$(mount | grep mmcblk1p1 | grep "on /" | cut -d ' ' -s -f 3)
+MOUNTED_AT=$(mount | grep $BOOTPART | grep "on /" | cut -d ' ' -s -f 3)
 if [[ "x$MOUNTED_AT" != "x" ]]
 then
 	if [[ -e "${MOUNTED_AT}/${DTB_TARGET}" ]] && [[ -e "${MOUNTED_AT}/${DTB}" ]]
@@ -34,17 +45,17 @@ then
 		exit
 	fi
 
-	echo "Error: the SD card is already mounted at $MOUNTED_AT, but the DTB files ($DTB_TARGET and $DTB) are not there."
+	echo "Error: the $BOOTDISK is already mounted at $MOUNTED_AT, but the DTB files ($DTB_TARGET and $DTB) are not there."
 	exit
 fi
 
-echo "Assuming boot files are on SD card, but your system is not. Mounting /dev/mmcblk1p1 on /boot."
+echo "Assuming boot files are on $BOOTDISK, but your system is not. Mounting /dev/$BOOTPART on /boot."
 
-mount /dev/mmcblk1p1 /boot
+mount /dev/$BOOTPART /boot
 
 if [[ -e "/boot/$DTB_TARGET" ]] && [[ -e "/boot/$DTB" ]]
 then
-	echo "Found source and target files in /boot."
+	echo "Found source and target files in the root directory of $BOOTPART."
 	cp -v "/boot/$DTB" "/boot/$DTB_TARGET"
 	echo "Restart MNT Reform (type: reboot) after saving your work to activate the changes."
 	umount /boot