Re: [PATCH v1] ARM: dts: imx7d-colibri-emmc: Add VGA overlay

[Frank Li <Frank.li@oss.nxp.com>]

On Tue, Sep 01, 2026 at 02:49:20PM +0200, Francesco Dolcini wrote:
> From: Francesco Dolcini <francesco.dolcini@toradex.com>
>
> Add a device tree overlay for the VGA output on the Colibri iMX7 parallel
> RGB LCD interface. The VGA output is driven through a non-programmable
> video DAC without VESA DDC I2C signals to a DVI connector.
>
> The overlay is also combined with the Aster, Evaluation Board v3, Iris
> and Iris v2 carrier board device trees to provide ready-to-use DTBs.
>
> Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
> ---
> this patch is on top of https://lore.kernel.org/all/20260723105225.194366-1-francesco@dolcini.it/
> ---
>  arch/arm/boot/dts/nxp/imx/Makefile            | 21 +++++++
>  .../dts/nxp/imx/imx7d-colibri-emmc-vga.dtso   | 59 +++++++++++++++++++
>  2 files changed, 80 insertions(+)
>  create mode 100644 arch/arm/boot/dts/nxp/imx/imx7d-colibri-emmc-vga.dtso
>
> diff --git a/arch/arm/boot/dts/nxp/imx/Makefile b/arch/arm/boot/dts/nxp/imx/Makefile
> index e9f95c3b8353..d1272104ef27 100644
> --- a/arch/arm/boot/dts/nxp/imx/Makefile
> +++ b/arch/arm/boot/dts/nxp/imx/Makefile
> @@ -436,18 +436,39 @@ imx7d-colibri-emmc-eval-v3-panel-res-touch-7inch-parallel-dtbs := \
>  	imx7d-colibri-emmc-eval-v3.dtb \
>  	imx7d-colibri-emmc-panel-res-touch-7inch-parallel.dtbo
>
> +imx7d-colibri-emmc-aster-vga-dtbs := \
> +	imx7d-colibri-emmc-aster.dtb \
> +	imx7d-colibri-emmc-vga.dtbo
> +
> +imx7d-colibri-emmc-eval-v3-vga-dtbs := \
> +	imx7d-colibri-emmc-eval-v3.dtb \
> +	imx7d-colibri-emmc-vga.dtbo
> +
> +imx7d-colibri-emmc-iris-vga-dtbs := \
> +	imx7d-colibri-emmc-iris.dtb \
> +	imx7d-colibri-emmc-vga.dtbo
> +
> +imx7d-colibri-emmc-iris-v2-vga-dtbs := \
> +	imx7d-colibri-emmc-iris-v2.dtb \
> +	imx7d-colibri-emmc-vga.dtbo
> +

Thanks for reuse overlay file.

Frank

>  dtb-$(CONFIG_SOC_IMX7D) += \
>  	imx7d-cl-som-imx7.dtb \
>  	imx7d-colibri-aster.dtb \
>  	imx7d-colibri-emmc-aster.dtb \
>  	imx7d-colibri-emmc-aster-panel-cap-touch-7inch-parallel.dtb \
> +	imx7d-colibri-emmc-aster-vga.dtb \
>  	imx7d-colibri-emmc-iris.dtb \
> +	imx7d-colibri-emmc-iris-vga.dtb \
>  	imx7d-colibri-emmc-iris-v2.dtb \
>  	imx7d-colibri-emmc-iris-v2-panel-cap-touch-7inch-parallel.dtb \
> +	imx7d-colibri-emmc-iris-v2-vga.dtb \
>  	imx7d-colibri-emmc-eval-v3.dtb \
>  	imx7d-colibri-emmc-eval-v3-panel-cap-touch-7inch-parallel-touch-adapter.dtb \
>  	imx7d-colibri-emmc-eval-v3-panel-res-touch-7inch-parallel.dtb \
> +	imx7d-colibri-emmc-eval-v3-vga.dtb \
>  	imx7d-colibri-emmc-panel-cap-touch-7inch-parallel.dtbo \
> +	imx7d-colibri-emmc-vga.dtbo \
>  	imx7d-colibri-eval-v3.dtb \
>  	imx7d-colibri-iris.dtb \
>  	imx7d-colibri-iris-v2.dtb \
> diff --git a/arch/arm/boot/dts/nxp/imx/imx7d-colibri-emmc-vga.dtso b/arch/arm/boot/dts/nxp/imx/imx7d-colibri-emmc-vga.dtso
> new file mode 100644
> index 000000000000..cda214c13876
> --- /dev/null
> +++ b/arch/arm/boot/dts/nxp/imx/imx7d-colibri-emmc-vga.dtso
> @@ -0,0 +1,59 @@
> +// SPDX-License-Identifier: GPL-2.0-only OR MIT
> +/*
> + * Copyright (c) Toradex
> + *
> + * VGA output connected to the Colibri parallel RGB LCD interface through a
> + * non-programmable video DAC with a DVI connector.
> + *
> + * The VGA output is available on multiple carrier boards (including Iris,
> + * Eval, Aster) without VESA DDC I2C signals.
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +&{/} {
> +	vga-encoder {
> +		compatible = "dumb-vga-dac";
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@0 {
> +				reg = <0>;
> +
> +				vga_enc_in: endpoint {
> +					remote-endpoint = <&lcdif_out>;
> +				};
> +			};
> +
> +			port@1 {
> +				reg = <1>;
> +
> +				vga_enc_out: endpoint {
> +					remote-endpoint = <&dvi_connector_in>;
> +				};
> +			};
> +		};
> +	};
> +
> +	dvi-connector {
> +		compatible = "dvi-connector";
> +		analog;
> +
> +		port {
> +			dvi_connector_in: endpoint {
> +				remote-endpoint = <&vga_enc_out>;
> +			};
> +		};
> +	};
> +};
> +
> +&lcdif {
> +	status = "okay";
> +};
> +
> +&lcdif_out {
> +	remote-endpoint = <&vga_enc_in>;
> +};
> --
> 2.47.3
>
>