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>

diff --git a/arch/arm/imx-common/Makefile b/arch/arm/imx-common/Makefile
index 6309fcdfe6806b701ef34d1375659360fa16b978..428a57e1cb7ce8308a5582e18b44a6fb47527cb1 100644 (file)
--- a/arch/arm/imx-common/Makefile
+++ b/arch/arm/imx-common/Makefile
@@ -32,6 +32,7 @@ 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-$(CONFIG_CMD_HDMIDETECT) += cmd_hdmidet.o
 COBJS  := $(sort $(COBJS-y))
 
 SRCS   := $(SOBJS:.o=.S) $(COBJS:.o=.c)

diff --git a/arch/arm/imx-common/cmd_hdmidet.c b/arch/arm/imx-common/cmd_hdmidet.c
new file mode 100644 (file)
index 0000000..794bf50
--- /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",
+       ""
+);