u-boot/arch/arm/mach-imx/cmd_hdmidet.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2012 Boundary Devices Inc.
 */
#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;
	return (readb(&hdmi->phy_stat0) & HDMI_DVI_STAT) ? 0 : 1;
}

U_BOOT_CMD(hdmidet, 1, 1, do_hdmidet,
	"detect HDMI monitor",
	""
);
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-06 21:58:06 +00:00			`// SPDX-License-Identifier: GPL-2.0+`
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> 2013-03-09 07:06:09 +00:00			`/*`
			`* Copyright (C) 2012 Boundary Devices Inc.`
			`*/`
			`#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;`
imx: nitrogen6x: mx6qsabrelite: Add support for DVI monitors A little background is probably appropriate for this patch. Since "the beginning" of usage of the SABRE Lite and Nitrogen6x boards, DVI detection has been somewhat broken. Some (most) DVI monitors don't produce the "HPD" bit in the PHY_STAT0 register, but do show proper toggling of the RX_SENSE0..3 bits. Creating a new the bit-mask to include all five bits and modifying the 'hdmidet' command and internal detection routines allows these monitors to function properly in U-Boot. A related patch to our kernels allows things to work under Linux: https://github.com/boundarydevices/linux-imx6/commit/7d8752905c118af9063738a533227de0b2f6ecd4 Signed-off-by: Robert Winkler <robert.winkler@boundarydevices.com> Acked-by: Stefano Babic <sbabic@denx.de> 2013-07-23 22:07:56 +00:00			`return (readb(&hdmi->phy_stat0) & HDMI_DVI_STAT) ? 0 : 1;`
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> 2013-03-09 07:06:09 +00:00			`}`

			`U_BOOT_CMD(hdmidet, 1, 1, do_hdmidet,`
			`"detect HDMI monitor",`
			`""`
			`);`