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cmd_hdmidet.c

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  • Forked from Reform / reform-boundary-uboot
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    cmd_hdmidet.c 1.23 KiB
    /*
     * 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",
    	""
    );