linux-kernel - Re: [PATCH 2/2] arm64: dts: imx8mp: Add overlays for ISP instances

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Date:   Wed, 29 Nov 2023 11:20:07 +0100
From:   Alexander Stein <alexander.stein@...tq-group.com>
To:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        Paul Elder <paul.elder@...asonboard.com>
Cc:     kieran.bingham@...asonboard.com, tomi.valkeinen@...asonboard.com,
        umang.jain@...asonboard.com,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Paul Elder <paul.elder@...asonboard.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Tim Harvey <tharvey@...eworks.com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        Marek Vasut <marex@...x.de>,
        Gregor Herburger <gregor.herburger@...tq-group.com>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        open list <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/2] arm64: dts: imx8mp: Add overlays for ISP instances

Hi Paul,

thanks for the patch.

Am Mittwoch, 29. November 2023, 10:31:13 CET schrieb Paul Elder:
> From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> 
> Add two overlay to enable each ISP instance. The ISP is wired directly
> to the CSIS for now, bypassing the ISI completely.

I'm not sure if this is worth adding in a separate overlay.

> Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Signed-off-by: Paul Elder <paul.elder@...asonboard.com>
> ---
>  arch/arm64/boot/dts/freescale/Makefile        |  2 ++
>  .../arm64/boot/dts/freescale/imx8mp-isp1.dtso | 36 +++++++++++++++++++
>  .../arm64/boot/dts/freescale/imx8mp-isp2.dtso | 36 +++++++++++++++++++
>  3 files changed, 74 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-isp1.dtso
>  create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-isp2.dtso
> 
> diff --git a/arch/arm64/boot/dts/freescale/Makefile
> b/arch/arm64/boot/dts/freescale/Makefile index 300049037eb0..f97dfac11189
> 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -113,6 +113,8 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-dhcom-pdk2.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-dhcom-pdk3.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-evk.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-icore-mx8mp-edimm2.2.dtb
> +dtb-$(CONFIG_ARCH_MXC) += imx8mp-isp1.dtbo
> +dtb-$(CONFIG_ARCH_MXC) += imx8mp-isp2.dtbo
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-msc-sm2s-ep1.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-phyboard-pollux-rdk.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpql-mba8mpxl.dtb
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-isp1.dtso
> b/arch/arm64/boot/dts/freescale/imx8mp-isp1.dtso new file mode 100644
> index 000000000000..cf394ed224ab
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-isp1.dtso
> @@ -0,0 +1,36 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright 2022 Ideas on Board Oy
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/media/video-interfaces.h>
> +
> +&isi_0 {
> +	status = "disabled";

ISI is disabled by default. What is your intention here?

> +
> +	ports {
> +		port@0 {
> +			/delete-node/ endpoint;

This doesn't work in overlays. See [1]. Otherwise the OF graph connections 
look fine to me. I'm using the same in my local overlay.

Best regards,
Alexander

[1] https://lore.kernel.org/all/
CAMuHMdWu4KZbBkvEofUV2wuA1g2S=XHHM3RUN1cNrcZBkhsPZA@...l.gmail.com/

> +		};
> +	};
> +};
> +
> +&isp_0 {
> +	status = "okay";
> +
> +	ports {
> +		port@1 {
> +			isp0_in: endpoint {
> +				bus-type = <MEDIA_BUS_TYPE_PARALLEL>;
> +				remote-endpoint = <&mipi_csi_0_out>;
> +			};
> +		};
> +	};
> +};
> +
> +&mipi_csi_0_out {
> +	remote-endpoint = <&isp0_in>;
> +};
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-isp2.dtso
> b/arch/arm64/boot/dts/freescale/imx8mp-isp2.dtso new file mode 100644
> index 000000000000..14e2e7b2617f
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-isp2.dtso
> @@ -0,0 +1,36 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright 2022 Ideas on Board Oy
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/media/video-interfaces.h>
> +
> +&isi_0 {
> +	status = "disabled";
> +
> +	ports {
> +		port@1 {
> +			/delete-node/ endpoint;
> +		};
> +	};
> +};
> +
> +&isp_1 {
> +	status = "okay";
> +
> +	ports {
> +		port@1 {
> +			isp1_in: endpoint {
> +				bus-type = <MEDIA_BUS_TYPE_PARALLEL>;
> +				remote-endpoint = <&mipi_csi_1_out>;
> +			};
> +		};
> +	};
> +};
> +
> +&mipi_csi_1_out {
> +	remote-endpoint = <&isp1_in>;
> +};


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