linux-kernel - Re: [PATCH v2 05/13] arm64: dts: qcom: sdm845-lg-judyln: Add display panel

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Message-ID: <6145be40-3b2b-4554-9d5e-c1f9fab0363b@oss.qualcomm.com>
Date: Wed, 17 Sep 2025 15:50:49 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Paul Sajna <sajattack@...tmarketos.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>, David Heidelberg <david@...t.cz>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org,
        Amir Dahan <system64fumo@...tonmail.com>,
        Christopher Brown <crispybrown@...il.com>
Subject: Re: [PATCH v2 05/13] arm64: dts: qcom: sdm845-lg-judyln: Add display
 panel

On 9/17/25 3:09 AM, Paul Sajna wrote:
> And supporting msm drm nodes, including backlight
> 
> Signed-off-by: Paul Sajna <sajattack@...tmarketos.org>
> Co-developed-by: Amir Dahan <system64fumo@...tonmail.com>
> Signed-off-by: Amir Dahan <system64fumo@...tonmail.com>
> ---

[...]

> +	display_panel: panel@0 {
> +		reg = <0>;
> +		compatible = "lg,sw49410";
> +
> +		backlight = <&pmi8998_wled>;
> +		reset-gpios = <&tlmm 6 GPIO_ACTIVE_LOW>;
> +
> +		pinctrl-names = "default", "sleep";
> +		pinctrl-0 = <&sde_dsi_active &sde_te_active>;
> +		pinctrl-1 = <&sde_dsi_sleep &sde_te_sleep>;

pinctrl-n
pinctrl-names

is preferred

[...]

> +	sde_te_active: sde-te-active-state {
> +		pins = "gpio10";
> +		function = "mdp_vsync";
> +		drive-strength = <2>;
> +		bias-disable;

The vendor kernel (for Sony phones at least) does pull-down on both
active and sleep, making them the same

Konrad

> +	};
> +
> +	sde_te_sleep: sde-te-sleep-state {
> +		pins = "gpio10";
> +		function = "mdp_vsync";
> +		drive-strength = <2>;
> +		bias-pull-down;
> +	};
>  };
>  
>  &uart6 {
>