Re: [PATCH v14 08/13] ARM: dts: imx7: Add video mux, csi and mipi_csi and connections

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Rui,

Thank you for the patch.

On Wed, Feb 06, 2019 at 03:13:23PM +0000, Rui Miguel Silva wrote:
> This patch adds the device tree nodes for csi, video multiplexer and
> mipi-csi besides the graph connecting the necessary endpoints to make
> the media capture entities to work in imx7 Warp board.
> 
> Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
> ---
>  arch/arm/boot/dts/imx7s-warp.dts | 51 ++++++++++++++++++++++++++++++++
>  arch/arm/boot/dts/imx7s.dtsi     | 27 +++++++++++++++++

I would have split this in two patches to make backporting easier, but
it's not a big deal.

Please see below for a few additional comments.

>  2 files changed, 78 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/imx7s-warp.dts b/arch/arm/boot/dts/imx7s-warp.dts
> index 23431faecaf4..358bcae7ebaf 100644
> --- a/arch/arm/boot/dts/imx7s-warp.dts
> +++ b/arch/arm/boot/dts/imx7s-warp.dts
> @@ -277,6 +277,57 @@
>  	status = "okay";
>  };
>  
> +&gpr {
> +	csi_mux {
> +		compatible = "video-mux";
> +		mux-controls = <&mux 0>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		port@1 {
> +			reg = <1>;
> +
> +			csi_mux_from_mipi_vc0: endpoint {
> +				remote-endpoint = <&mipi_vc0_to_csi_mux>;
> +			};
> +		};
> +
> +		port@2 {
> +			reg = <2>;
> +
> +			csi_mux_to_csi: endpoint {
> +				remote-endpoint = <&csi_from_csi_mux>;
> +			};
> +		};
> +	};
> +};
> +
> +&csi {
> +	status = "okay";
> +
> +	port {
> +		csi_from_csi_mux: endpoint {
> +			remote-endpoint = <&csi_mux_to_csi>;
> +		};
> +	};
> +};

Shouldn't these two nodes, as well as port@1 of the mipi_csi node, be
moved to imx7d.dtsi ?

> +
> +&mipi_csi {
> +	clock-frequency = <166000000>;
> +	status = "okay";
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	fsl,csis-hs-settle = <3>;

Shouldn't this be an endpoint property ? Different sensors connected
through different endpoints could have different timing requirements.

> +
> +	port@1 {
> +		reg = <1>;
> +
> +		mipi_vc0_to_csi_mux: endpoint {
> +			remote-endpoint = <&csi_mux_from_mipi_vc0>;
> +		};
> +	};
> +};
> +
>  &wdog1 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_wdog>;
> diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
> index 792efcd2caa1..01962f85cab6 100644
> --- a/arch/arm/boot/dts/imx7s.dtsi
> +++ b/arch/arm/boot/dts/imx7s.dtsi
> @@ -8,6 +8,7 @@
>  #include <dt-bindings/gpio/gpio.h>
>  #include <dt-bindings/input/input.h>
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/reset/imx7-reset.h>
>  #include "imx7d-pinfunc.h"
>  
>  / {
> @@ -709,6 +710,17 @@
>  				status = "disabled";
>  			};
>  
> +			csi: csi@30710000 {
> +				compatible = "fsl,imx7-csi";
> +				reg = <0x30710000 0x10000>;
> +				interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
> +				clocks = <&clks IMX7D_CLK_DUMMY>,
> +						<&clks IMX7D_CSI_MCLK_ROOT_CLK>,
> +						<&clks IMX7D_CLK_DUMMY>;
> +				clock-names = "axi", "mclk", "dcic";
> +				status = "disabled";
> +			};
> +
>  			lcdif: lcdif@30730000 {
>  				compatible = "fsl,imx7d-lcdif", "fsl,imx28-lcdif";
>  				reg = <0x30730000 0x10000>;
> @@ -718,6 +730,21 @@
>  				clock-names = "pix", "axi";
>  				status = "disabled";
>  			};
> +
> +			mipi_csi: mipi-csi@30750000 {
> +				compatible = "fsl,imx7-mipi-csi2";
> +				reg = <0x30750000 0x10000>;
> +				interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
> +				clocks = <&clks IMX7D_IPG_ROOT_CLK>,
> +					<&clks IMX7D_MIPI_CSI_ROOT_CLK>,
> +					<&clks IMX7D_MIPI_DPHY_ROOT_CLK>;
> +				clock-names = "pclk", "wrap", "phy";
> +				power-domains = <&pgc_mipi_phy>;
> +				phy-supply = <&reg_1p0d>;
> +				resets = <&src IMX7_RESET_MIPI_PHY_MRST>;
> +				reset-names = "mrst";
> +				status = "disabled";

How about already declaring port@0 here too (but obviously without any
endoint) ?

> +			};
>  		};
>  
>  		aips3: aips-bus@30800000 {

-- 
Regards,

Laurent Pinchart