Re: [PATCH v8 4/7] arm64: dts: renesas: condor: Enable MAX9286

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Quoting Jacopo Mondi (2021-12-16 16:34:36)
> Enable the MAX9286 GMSL deserializers on Condor-V3H board.
> 
> Connected cameras should be defined in a device-tree overlay or included
> after these definitions.
> 
> Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>

This looks good to me. It now enables the CSI2s, and the max9286 will
have no children. Will this create a completed media graph that simply
has no cameras connected? Or will the max9286 return a failure if there
are no devices attached.

I could look this up I guess, but I'm only curious of what potential
side effects there are of having a now successfully probed CSI2
receiver/VIN but without any cameras.

Reviewed-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>


> ---
>  .../boot/dts/renesas/r8a77980-condor.dts      | 193 ++++++++++++++++++
>  1 file changed, 193 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/renesas/r8a77980-condor.dts b/arch/arm64/boot/dts/renesas/r8a77980-condor.dts
> index 3d6d10c82f48..2eb2b852ddca 100644
> --- a/arch/arm64/boot/dts/renesas/r8a77980-condor.dts
> +++ b/arch/arm64/boot/dts/renesas/r8a77980-condor.dts
> @@ -6,6 +6,8 @@
>   * Copyright (C) 2018 Cogent Embedded, Inc.
>   */
>  
> +#include <dt-bindings/gpio/gpio.h>
> +
>  /dts-v1/;
>  #include "r8a77980.dtsi"
>  #include <dt-bindings/gpio/gpio.h>
> @@ -108,6 +110,34 @@ channel0 {
>         };
>  };
>  
> +&csi40 {
> +       status = "okay";
> +
> +       ports {
> +               port@0 {
> +                       csi40_in: endpoint {
> +                               clock-lanes = <0>;
> +                               data-lanes = <1 2 3 4>;
> +                               remote-endpoint = <&max9286_out0>;
> +                       };
> +               };
> +       };
> +};
> +
> +&csi41 {
> +       status = "okay";
> +
> +       ports {
> +               port@0 {
> +                       csi41_in: endpoint {
> +                               clock-lanes = <0>;
> +                               data-lanes = <1 2 3 4>;
> +                               remote-endpoint = <&max9286_out1>;
> +                       };
> +               };
> +       };
> +};
> +
>  &du {
>         clocks = <&cpg CPG_MOD 724>,
>                  <&x1_clk>;
> @@ -200,6 +230,164 @@ adv7511_out: endpoint {
>         };
>  };
>  
> +&i2c1 {
> +       pinctrl-0 = <&i2c1_pins>;
> +       pinctrl-names = "default";
> +
> +       status = "okay";
> +       clock-frequency = <400000>;
> +
> +       gmsl0: gmsl-deserializer@48 {
> +               compatible = "maxim,max9286";
> +               reg = <0x48>;
> +
> +               maxim,gpio-poc = <0 GPIO_ACTIVE_LOW>;
> +               enable-gpios = <&io_expander0 0 GPIO_ACTIVE_HIGH>;
> +
> +               ports {
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +
> +                       port@0 {
> +                               reg = <0>;
> +                       };
> +
> +                       port@1 {
> +                               reg = <1>;
> +                       };
> +
> +                       port@2 {
> +                               reg = <2>;
> +                       };
> +
> +                       port@3 {
> +                               reg = <3>;
> +                       };
> +
> +                       port@4 {
> +                               reg = <4>;
> +                               max9286_out0: endpoint {
> +                                       clock-lanes = <0>;
> +                                       data-lanes = <1 2 3 4>;
> +                                       remote-endpoint = <&csi40_in>;
> +                               };
> +                       };
> +               };
> +
> +               i2c-mux {
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +
> +                       i2c@0 {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0>;
> +
> +                               status = "disabled";
> +                       };
> +
> +                       i2c@1 {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <1>;
> +
> +                               status = "disabled";
> +                       };
> +
> +                       i2c@2 {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <2>;
> +
> +                               status = "disabled";
> +                       };
> +
> +                       i2c@3 {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <3>;
> +
> +                               status = "disabled";
> +                       };
> +               };
> +       };
> +
> +       gmsl1: gmsl-deserializer@4a {
> +               compatible = "maxim,max9286";
> +               reg = <0x4a>;
> +
> +               maxim,gpio-poc = <0 GPIO_ACTIVE_LOW>;
> +               enable-gpios = <&io_expander1 0 GPIO_ACTIVE_HIGH>;
> +
> +               ports {
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +
> +                       port@0 {
> +                               reg = <0>;
> +                       };
> +
> +                       port@1 {
> +                               reg = <1>;
> +                       };
> +
> +                       port@2 {
> +                               reg = <2>;
> +                       };
> +
> +                       port@3 {
> +                               reg = <3>;
> +                       };
> +
> +                       port@4 {
> +                               reg = <4>;
> +                               max9286_out1: endpoint {
> +                                       clock-lanes = <0>;
> +                                       data-lanes = <1 2 3 4>;
> +                                       remote-endpoint = <&csi41_in>;
> +                               };
> +                       };
> +               };
> +
> +               i2c-mux {
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +
> +                       i2c@0 {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <0>;
> +
> +                               status = "disabled";
> +                       };
> +
> +                       i2c@1 {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <1>;
> +
> +                               status = "disabled";
> +                       };
> +
> +                       i2c@2 {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <2>;
> +
> +                               status = "disabled";
> +                       };
> +
> +                       i2c@3 {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               reg = <3>;
> +
> +                               status = "disabled";
> +                       };
> +               };
> +       };
> +};
> +
>  &lvds0 {
>         status = "okay";
>  
> @@ -256,6 +444,11 @@ i2c0_pins: i2c0 {
>                 function = "i2c0";
>         };
>  
> +       i2c1_pins: i2c1 {
> +               groups = "i2c1";
> +               function = "i2c1";
> +       };
> +
>         mmc_pins: mmc {
>                 groups = "mmc_data8", "mmc_ctrl", "mmc_ds";
>                 function = "mmc";
> -- 
> 2.33.1
>




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