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Date:   Tue, 21 Nov 2023 15:55:13 +0100
From:   Johan Hovold <johan@kernel.org>
To:     Mrinmay Sarkar <quic_msarkar@quicinc.com>
Cc:     agross@kernel.org, andersson@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
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Subject: Re: [PATCH v4 3/3] arm64: dts: qcom: sa8775p: Mark PCIe EP
 controller as cache coherent
Message-ID: <ZVzE0c8UsW4HXV_u@hovoldconsulting.com>
References: <1700577493-18538-1-git-send-email-quic_msarkar@quicinc.com>
 <1700577493-18538-4-git-send-email-quic_msarkar@quicinc.com>
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On Tue, Nov 21, 2023 at 08:08:13PM +0530, Mrinmay Sarkar wrote:
> The PCIe EP controller on SA8775P supports cache coherency, hence add
> the "dma-coherent" property to mark it as such.
> 
> Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
>  arch/arm64/boot/dts/qcom/sa8775p.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> index 7eab458..ab01efe 100644
> --- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> @@ -3620,6 +3620,7 @@
>  				<&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_PCIE_0 0>;
>  		interconnect-names = "pcie-mem", "cpu-pcie";
>  
> +		dma-coherent;
>  		iommus = <&pcie_smmu 0x0000 0x7f>;
>  		resets = <&gcc GCC_PCIE_0_BCR>;
>  		reset-names = "core";

What tree is this against? 

Both controllers are already marked as dma-coherent in mainline so this
patch makes no sense (and the context also looks wrong).

It was even you added them apparently:

	489f14be0e0a ("arm64: dts: qcom: sa8775p: Add pcie0 and pcie1 nodes")

Johan