linux-kernel - Re: [PATCH 3/3] arm64: dts: qcom: sc7180: Add missing MDSS core reset

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Message-ID: <b27bd055-d6e1-4021-a2e6-95064b2a0ea3@oss.qualcomm.com>
Date: Tue, 20 Jan 2026 12:21:42 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Konrad Dybcio <konradybcio@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd
 <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Taniya Das <quic_tdas@...cinc.com>,
        cros-qcom-dts-watchers@...omium.org,
        Kalyan Thota
 <quic_kalyant@...cinc.com>,
        Douglas Anderson <dianders@...omium.org>,
        Harigovindan P <harigovi@...eaurora.org>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Val Packett <val@...kett.cool>
Subject: Re: [PATCH 3/3] arm64: dts: qcom: sc7180: Add missing MDSS core reset

On 1/20/26 12:19 PM, Konrad Dybcio wrote:
> From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> 
> To make sure the core starts in a predictable state, it's useful to
> first reset it.
> 
> Wire up the reset to fulfill that missing part of the HW description.
> 
> Reported-by: Val Packett <val@...kett.cool>
> Fixes: a3db7ad1af49 ("arm64: dts: sc7180: add display dt nodes")
> Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/sc7180.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index 45b9864e3304..f7937fa88536 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -3221,6 +3221,8 @@ mdss: display-subsystem@...0000 {
>  				 <&dispcc DISP_CC_MDSS_MDP_CLK>;
>  			clock-names = "iface", "ahb", "core";
>  
> +			resets = <&dispcc DISPCC_MDSS_CORE_BCR>;

^ won't compile without a _ between 'DISP' and 'CC', should have 
compile-tested harder..

Konrad