[PATCH 1/4] ARM: dts: am437x-gp-evm: add HDMI support

[Tony Lindgren]

Hi,

* Tomi Valkeinen <tomi.valkeinen at ti.com> [191125 05:11]:
> Add HDMI support for AM437x GP EVM. The HDMI uses SiI9022 HDMI encoder,
> and is mutually exclusive with the LCD. The choice between LCD and HDMI
> is made by booting either with am437x-gp-evm.dtb or
> am437x-gp-evm-hdmi.dtb.

So Linux kernel needs a new board device tree file to toggle a GPIO line
to switch between LCD mode and HDMI?

That does not sound very user friendly for something that's supposed
to be hot pluggabe :)

> +/* Override SelLCDorHDMI from am437x-gp-evm.dts to select HDMI */
> +&gpio5 {
> +	p8 {
> +		output-low;
> +	};
> +};

How about just leave the gpio unconfigured and document that a userspace
tool or /sys/kernel/debug/gpio is needed to toggle between the modes?

Regards,

Tony