Re: [PATCH 3/4] arm64: dts: qcom: sdm845: Add missing MDSS reset

[David Heidelberg]

On 18/02/2026 11:30, Konrad Dybcio wrote:
> On 2/17/26 10:20 PM, Dmitry Baryshkov wrote:
> > From: David Heidelberg <david@xxxxxxx>
> >
> > If the OS does not support recovering the state left by the
> > bootloader it needs a way to reset display hardware, so that it can
> > start from a clean state. Add a reference to the relevant reset.
>
> This is not the relevant reset
>
> You want MDSS_CORE_BCR @ 0xaf0_2000

Thanks, I prepared the fixes [1].

I'll try to test it if it's not breaking anything for us and send as v2 
of [2].

David

[1] https://codeberg.org/sdm845/linux/commits/branch/b4/mdss-reset
[2] 
https://patchwork.kernel.org/project/linux-arm-msm/patch/20260112-mdss-reset-v1-1-af7c572204d3@xxxxxxx/

> Konrad
>
> > Signed-off-by: David Heidelberg <david@xxxxxxx>
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
> > ---
>
>
> >   arch/arm64/boot/dts/qcom/sdm845.dtsi | 1 +
> >   1 file changed, 1 insertion(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > index bf2f9c04adba..75c192eddc57 100644
> > --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > @@ -4550,6 +4550,7 @@ mdss: display-subsystem@ae00000 {
> >   			reg-names = "mdss";
> >   
> >   			power-domains = <&dispcc MDSS_GDSC>;
> > +			resets = <&dispcc DISP_CC_MDSS_RSCC_BCR>;
> >   
> >   			clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
> >   				 <&dispcc DISP_CC_MDSS_MDP_CLK>;

--
David Heidelberg