linux-kernel - Re: [PATCH 5/5] arm64: dts: qcom: msm8953-xiaomi-daisy: fix backlight

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Message-ID: <db0ee006-44bb-4587-b4d5-3f767cedc3cc@oss.qualcomm.com>
Date: Wed, 7 Jan 2026 15:13:03 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Barnabás Czémán <barnabas.czeman@...nlining.org>,
        Lee Jones <lee@...nel.org>, Daniel Thompson <danielt@...nel.org>,
        Jingoo Han <jingoohan1@...il.com>, Pavel Machek <pavel@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Kiran Gunda <quic_kgunda@...cinc.com>, Helge Deller <deller@....de>,
        Luca Weiss <luca@...aweiss.eu>, Konrad Dybcio <konradybcio@...nel.org>,
        Eugene Lepshy <fekz115@...il.com>,
        Gianluca Boiano <morf3089@...il.com>,
        Alejandro Tafalla <atafalla@...on.com>
Cc: dri-devel@...ts.freedesktop.org, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Daniel Thompson <daniel.thompson@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-fbdev@...r.kernel.org
Subject: Re: [PATCH 5/5] arm64: dts: qcom: msm8953-xiaomi-daisy: fix backlight

On 1/7/26 2:31 PM, Barnabás Czémán wrote:
> Set qcom,num-strings to 3 instead of 2 for avoid stripes.

"""
The backlight on this device is connected via 3 strings. Currently,
the DT claims only two are present, which results in visible stripes
on the display (since every third backlight string remains unconfigured).

Fix the number of strings to avoid that
"""

Konrad

> 
> Fixes: 38d779c26395 ("arm64: dts: qcom: msm8953: Add device tree for Xiaomi Mi A2 Lite")
> Signed-off-by: Barnabás Czémán <barnabas.czeman@...nlining.org>
> ---
>  arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts b/arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts
> index ddd7af616794..59f873a06e4d 100644
> --- a/arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts
> +++ b/arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts
> @@ -157,7 +157,7 @@ &pm8953_resin {
>  
>  &pmi8950_wled {
>  	qcom,current-limit-microamp = <20000>;
> -	qcom,num-strings = <2>;
> +	qcom,num-strings = <3>;
>  
>  	status = "okay";
>  };
>