Odroid-XU4: Initial commit (#303)

buildroot-external/board/hardkernel/odroid-xu4/boot-env.txt

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+
+macaddr=00:1e:06:61:7a:39
+vout=hdmi
+vout=hdmi
+# - DVI Mode (disables sound over HDMI as per DVI compat)
+# vout=dvi
+
+# --- HDMI CEC Configuration ---
+# ------------------------------------------
+cecenable=false
+# set to true to enable HDMI CEC
+
+# Enable/Disable ODROID-VU7 Touchsreen
+disable_vu7=false
+
+# DRAM Frequency
+# Sets the LPDDR3 memory frequency
+# Supported values: 933 825 728 633 (MHZ)
+ddr_freq 825
+
+# External watchdog board enable
+external_watchdog=false
+# debounce time set to 3 ~ 10 sec, default 3 sec
+external_watchdog_debounce=3
+
+
+#------------------------------------------------------------------------------
+#
+# HDMI Hot Plug detection
+#
+#------------------------------------------------------------------------------
+#
+# Forces the HDMI subsystem to ignore the check if the cable is connected or
+# not.
+# false : disable the detection and force it as connected.
+# true : let cable, board and monitor decide the connection status.
+#
+# default: true
+#
+#------------------------------------------------------------------------------
+HPD=true