i.MX6: Add hdmidet command to detect attached HDMI monitor

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Acked-by: Stefano Babic <sbabic@denx.de>

1 files changed, 37 insertions, 0 deletions

diff --git a/arch/arm/imx-common/cmd_hdmidet.c b/arch/arm/imx-common/cmd_hdmidet.c
new file mode 100644
index 000000000..794bf50cb
--- /dev/null
+++ b/arch/arm/imx-common/cmd_hdmidet.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2012 Boundary Devices Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/mxc_hdmi.h>
+#include <asm/io.h>
+
+static int do_hdmidet(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	struct hdmi_regs *hdmi	= (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
+	u8 reg = readb(&hdmi->phy_stat0) & HDMI_PHY_HPD;
+	return (reg&HDMI_PHY_HPD) ? 0 : 1;
+}
+
+U_BOOT_CMD(hdmidet, 1, 1, do_hdmidet,
+	"detect HDMI monitor",
+	""
+);