linux-kernel - Re: [PATCH] arm64: dts: qcom: Drop bogus interrupt flags cell on MDSS nodes

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Message-ID: <20220301222440.pn3uxnoata4jaq4z@SoMainline.org>
Date:   Tue, 1 Mar 2022 23:24:40 +0100
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: Drop bogus interrupt flags cell on
 MDSS nodes

Hi Rob,

On 2022-03-01 15:05:31, Rob Herring wrote:
> The MDSS interrupt provider is a single cell, so specifying interrupt flags
> on the consumers is incorrect.

There seem to be many more violators of `#interrupt-cells = <1>;`, at
least on -next e6ada6df471f.  It seems those are not intentionally
omitted in this patch?  Searching for `interrupt-parent = <&mdss>;`
globally and evaluating `interrupts =` right next to it yields:

- Two more hits in both sdm845.dtsi and sm8250.dtsi;
- qcom-msm8974.dtsi;
- msm8996.dtsi;
- sdm630.dtsi;
- sdm660.dtsi.

And for the docs patch:
- mdp5.txt;
- And the recently added dpu-qcm2290.yaml, whose CI failure might have
  exactly lead to this patch?

Would you mind cleaning these up in a v2, or otherwise explain and
forgive my ignorance for not seeing why these were not changed?

Thanks!

- Marijn

> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
>  arch/arm64/boot/dts/qcom/sdm845.dtsi | 2 +-
>  arch/arm64/boot/dts/qcom/sm8250.dtsi | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> index 41f4e46e1f85..a6bf04780667 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> @@ -4281,7 +4281,7 @@ mdss_mdp: mdp@...1000 {
>  				power-domains = <&rpmhpd SDM845_CX>;
>  
>  				interrupt-parent = <&mdss>;
> -				interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
> +				interrupts = <0>;
>  
>  				ports {
>  					#address-cells = <1>;
> diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
> index fdaf303ba047..e732e3370c75 100644
> --- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
> @@ -3200,7 +3200,7 @@ mdss_mdp: mdp@...1000 {
>  				power-domains = <&rpmhpd SM8250_MMCX>;
>  
>  				interrupt-parent = <&mdss>;
> -				interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
> +				interrupts = <0>;
>  
>  				ports {
>  					#address-cells = <1>;
> -- 
> 2.32.0
>