linux-kernel - Re: [PATCH v6 4/5] ARM: dts: da850-lcdk: add the vga-bridge node

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Date:   Tue, 13 Dec 2016 10:46:44 +0200
From:   Tomi Valkeinen <tomi.valkeinen@...com>
To:     Bartosz Golaszewski <bgolaszewski@...libre.com>
CC:     Jyri Sarha <jsarha@...com>, David Airlie <airlied@...ux.ie>,
        Kevin Hilman <khilman@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Sekhar Nori <nsekhar@...com>, Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Russell King <linux@...linux.org.uk>,
        LKML <linux-kernel@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        linux-drm <dri-devel@...ts.freedesktop.org>,
        linux-devicetree <devicetree@...r.kernel.org>
Subject: Re: [PATCH v6 4/5] ARM: dts: da850-lcdk: add the vga-bridge node

Hi,

On 12/12/16 15:05, Bartosz Golaszewski wrote:

> +&lcdc {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&lcd_pins>;
> +
> +	ports {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		lcdc_out: port@1 {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			reg = <1>;
> +
> +			lcdc_out_vga: endpoint {
> +				reg = <0>;
> +				remote-endpoint = <&vga_bridge_in>;
> +			};
> +		};
> +	};
> +};
> 

This is not correct. LCDC has just one output, so port@1 doesn't make
sense. It's port@0. But with just one port, you can leave "ports" away.
And you don't need the port's label for anything, if I'm not mistaken. So:

&lcdc {
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&lcd_pins>;

	port {
		lcdc_out_vga: endpoint {
			remote-endpoint = <&vga_bridge_in>;
		};
	};
};

 Tomi



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