linux-kernel - Re: [PATCH v3 7/9] arm64: dts: imx943: Add display pipeline nodes

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Message-ID: <20250807-illustrious-cuckoo-of-management-dacca0@kuoka>
Date: Thu, 7 Aug 2025 09:31:46 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
Cc: imx@...ts.linux.dev, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.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>, Frank Li <frank.li@....com>, 
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 7/9] arm64: dts: imx943: Add display pipeline nodes

On Wed, Aug 06, 2025 at 06:05:14PM +0300, Laurentiu Palcu wrote:
> Add display controller and LDB support in imx943.
> 
> Signed-off-by: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
> ---
>  arch/arm64/boot/dts/freescale/imx943.dtsi | 55 ++++++++++++++++++++++-
>  1 file changed, 54 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx943.dtsi b/arch/arm64/boot/dts/freescale/imx943.dtsi
> index 657c81b6016f2..70dec03c5608e 100644
> --- a/arch/arm64/boot/dts/freescale/imx943.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx943.dtsi
> @@ -148,7 +148,7 @@ l3_cache: l3-cache {
>  		};
>  	};
>  
> -	clock-ldb-pll-div7 {
> +	clock_ldb_pll_div7: clock-ldb-pll-div7 {
>  		compatible = "fixed-factor-clock";
>  		#clock-cells = <0>;
>  		clocks = <&scmi_clk IMX94_CLK_LDBPLL>;
> @@ -174,9 +174,62 @@ dispmix_csr: syscon@...10000 {
>  		lvds_csr: syscon@...c0000 {
>  			compatible = "nxp,imx94-lvds-csr", "syscon";
>  			reg = <0x0 0x4b0c0000 0x0 0x10000>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
>  			clocks = <&scmi_clk IMX94_CLK_DISPAPB>;
>  			#clock-cells = <1>;
>  			power-domains = <&scmi_devpd IMX94_PD_DISPLAY>;
> +
> +			ldb: ldb@4 {
> +				compatible = "fsl,imx94-ldb";
> +				reg = <0x4 0x4>, <0x8 0x4>;
> +				#address-cells = <1>;
> +				#size-cells = <0>;

Why? There are no children with addressing. You never tested it because
this would easily be flagged by tools.

> +				reg-names = "ldb", "lvds";

Follow DTS coding style.

Best regards,
Krzysztof