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

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>

2 files changed, 39 insertions, 1 deletions

diff --git a/arch/arm/imx-common/Makefile b/arch/arm/imx-common/Makefile
index b3e608e9db..410fb16820 100644
--- a/arch/arm/imx-common/Makefile
+++ b/arch/arm/imx-common/Makefile
@@ -32,8 +32,9 @@ COBJS-y	= iomux-v3.o timer.o cpu.o speed.o
 COBJS-$(CONFIG_I2C_MXC) += i2c-mxv7.o
 endif
 COBJS-$(CONFIG_CMD_BMODE) += cmd_bmode.o
-COBJS	:= $(sort $(COBJS-y))
+COBJS-$(CONFIG_CMD_HDMIDETECT) += cmd_hdmidet.o
 
+COBJS	:= $(sort $(COBJS-y))
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
 
diff --git a/arch/arm/imx-common/cmd_hdmidet.c b/arch/arm/imx-common/cmd_hdmidet.c
new file mode 100644
index 0000000000..ede5d886ca
--- /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>
+
+int do_hdmidet(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	u8 reg = __raw_readb(HDMI_ARB_BASE_ADDR+HDMI_PHY_STAT0);
+	return (reg&HDMI_PHY_HPD)
+		? 0 : 1;
+}
+
+U_BOOT_CMD(hdmidet, 1, 1, do_hdmidet,
+	"detect HDMI monitor",
+	""
+);