linux-kernel - Re: [PATCH] arm64: dts: qcom: msm8916-samsung-a3u: add nodes for display panel

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Date:   Thu, 14 May 2020 10:23:26 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     michael.srba@...nam.cz
Cc:     Andy Gross <agross@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH] arm64: dts: qcom: msm8916-samsung-a3u: add nodes for
 display panel

On Thu 14 May 10:01 PDT 2020, michael.srba@...nam.cz wrote:

> From: Michael Srba <michael.srba@...nam.cz>
> 
> This patch wires up display support on Samsung Galaxy A3 2015.
> 
> Signed-off-by: Michael Srba <michael.srba@...nam.cz>
> 
> ---
>  .../qcom/msm8916-samsung-a2015-common.dtsi    | 44 +++++++++++++++
>  .../boot/dts/qcom/msm8916-samsung-a3u-eur.dts | 54 +++++++++++++++++++
>  2 files changed, 98 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi b/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi
> index af812f76e8be..2a64aa269f52 100644
> --- a/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi
> @@ -72,6 +72,24 @@ phy {
>  			};
>  		};
>  
> +		mdss@...0000 {
> +			dsi@...8000 {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				vdda-supply = <&pm8916_l2>;
> +				vddio-supply = <&pm8916_l6>;
> +
> +				pinctrl-names = "default", "sleep";
> +				pinctrl-0 = <&mdss_default>;
> +				pinctrl-1 = <&mdss_sleep>;
> +			};
> +
> +			dsi-phy@...8300 {
> +				vddio-supply = <&pm8916_l6>;
> +			};
> +		};
> +
>  		wcnss@...b000 {
>  			status = "okay";
>  		};
> @@ -172,6 +190,32 @@ pinconf {
>  			bias-disable;
>  		};
>  	};
> +
> +	pmx-mdss {
> +		mdss_default: mdss-default {
> +			pinmux {
> +				function = "gpio";
> +				pins = "gpio25";
> +			};
> +			pinconf {
> +				pins = "gpio25";
> +				drive-strength = <8>;
> +				bias-disable;
> +			};
> +		};

Fyi, when you have a state with a single set of properties you don't
need the pinmux/pinconf level here, you can directly do:

		mdss_default: mdss-default {
			pins = "gpio25";
			function = "gpio";

			drive-strength = <8>;
			bias-disable;
		};


But this looks good, applied towards v5.8.

Regards,
Bjorn