linux-kernel - Re: [RFC PATCH v2 3/6] dt-binding: tegra: Add VI and CSI bindings

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Message-ID: <20200206214953.GA4995@bogus>
Date:   Thu, 6 Feb 2020 14:49:53 -0700
From:   Rob Herring <robh@...nel.org>
To:     Sowjanya Komatineni <skomatineni@...dia.com>
Cc:     thierry.reding@...il.com, jonathanh@...dia.com, frankc@...dia.com,
        hverkuil@...all.nl, helen.koike@...labora.com, sboyd@...nel.org,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v2 3/6] dt-binding: tegra: Add VI and CSI bindings

On Wed, Feb 05, 2020 at 01:23:23PM -0800, Sowjanya Komatineni wrote:
> Tegra contains VI controller which can support up to 6 MIPI CSI
> camera sensors.
> 
> Each Tegra CSI port from CSI unit can be one-to-one mapper to
> VI channel and can capture from an external camera sensor or
> from built-in test pattern generator.
> 
> This patch adds dt-bindings for Tegra VI and CSI.
> 
> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
> ---
>  .../display/tegra/nvidia,tegra20-host1x.txt        | 55 ++++++++++++++++++----
>  1 file changed, 47 insertions(+), 8 deletions(-)

Thierry is working on converting this to schema, so you'll need to 
coordinate.

Rob

> 
> diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
> index 9999255ac5b6..3d0ed540a646 100644
> --- a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
> +++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
> @@ -40,14 +40,24 @@ of the following host1x client modules:
>  
>    Required properties:
>    - compatible: "nvidia,tegra<chip>-vi"
> -  - reg: Physical base address and length of the controller's registers.
> +  - reg: Physical base address and length of the controller registers.
>    - interrupts: The interrupt outputs from the controller.
> -  - clocks: Must contain one entry, for the module clock.
> +  - clocks: Must contain an entry for the module clock "vi"
>      See ../clocks/clock-bindings.txt for details.
>    - resets: Must contain an entry for each entry in reset-names.
>      See ../reset/reset.txt for details.
> -  - reset-names: Must include the following entries:
> -    - vi
> +  - reset-names: Must include the entry "vi"
> +
> +  Tegra210 has CSI part of VI sharing same host interface and register
> +  space. So, VI device node should have CSI child node.
> +
> +  - csi: mipi csi interface to vi
> +
> +    Required properties:
> +    - compatible: "nvidia,tegra<chip>-csi"
> +    - reg: Physical base address and length of the controller registers.
> +    - clocks: Must contain entries csi, cilab, cilcd, cile clocks.
> +      See ../clocks/clock-bindings.txt for details.
>  
>  - epp: encoder pre-processor
>  
> @@ -310,12 +320,41 @@ Example:
>  		};
>  
>  		vi {
> -			compatible = "nvidia,tegra20-vi";
> -			reg = <0x54080000 0x00040000>;
> +			compatible = "nvidia,tegra210-vi";
> +			reg = <0x0 0x54080000 0x0 0x700>;
>  			interrupts = <0 69 0x04>;
> -			clocks = <&tegra_car TEGRA20_CLK_VI>;
> -			resets = <&tegra_car 100>;
> +			assigned-clocks = <&tegra_car TEGRA210_CLK_VI>;
> +			assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_C4_OUT0>;
> +			clocks = <&tegra_car TEGRA210_CLK_VI>;
> +			clock-names = "vi";
> +			resets = <&tegra_car 20>;
>  			reset-names = "vi";
> +
> +			#address-cells = <2>;
> +			#size-cells = <2>;
> +
> +			ranges = <0x0 0x54080808 0x0 0x54080808 0x0 0x2000>;
> +
> +			csi@...4080838 {
> +				compatible = "nvidia,tegra210-csi";
> +				reg = <0x0 0x54080838 0x0 0x2000>;
> +				status = "disabled";
> +				assigned-clocks = <&tegra_car TEGRA210_CLK_CILAB>,
> +						  <&tegra_car TEGRA210_CLK_CILCD>,
> +						  <&tegra_car TEGRA210_CLK_CILE>;
> +				assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_P>,
> +							 <&tegra_car TEGRA210_CLK_PLL_P>,
> +							 <&tegra_car TEGRA210_CLK_PLL_P>;
> +				assigned-clock-rates = <102000000>,
> +						       <102000000>,
> +						       <102000000>;
> +				clocks = <&tegra_car TEGRA210_CLK_CSI>,
> +					 <&tegra_car TEGRA210_CLK_CILAB>,
> +					 <&tegra_car TEGRA210_CLK_CILCD>,
> +					 <&tegra_car TEGRA210_CLK_CILE>;
> +				clock-names = "csi", "cilab", "cilcd", "cile";
> +			};
> +
>  		};
>  
>  		epp {
> -- 
> 2.7.4
>