From: Bjorn Andersson <andersson@kernel.org>
To: Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sm8650: set ufs as dma coherent
Date: Mon, 27 Oct 2025 17:37:16 -0500 [thread overview]
Message-ID: <176160465206.73268.9315499672676137244.b4-ty@kernel.org> (raw)
In-Reply-To: <20251007-topic-sm8650-upstream-ufs-dma-coherent-v1-1-f3cfeaee04ce@linaro.org>
On Tue, 07 Oct 2025 20:53:44 +0200, Neil Armstrong wrote:
> The UFS device is ovbiously dma coherent like the other IOMMU devices
> like usb, mmc, ... let's fix this by adding the flag.
>
> To be sure an extensive test has been performed to be sure it's
> safe, as downstream uses this flag for UFS as well.
>
> As an experiment, I checked how the dma-coherent could impact
> the UFS bandwidth, and it happens the max bandwidth on cached
> write is slighly highter (up to 10%) while using less cpu time
> since cache sync/flush is skipped.
>
> [...]
Applied, thanks!
[1/1] arm64: dts: qcom: sm8650: set ufs as dma coherent
commit: c2703c90161b45bca5b65f362adbae02ed71fcc1
Best regards,
--
Bjorn Andersson <andersson@kernel.org>
prev parent reply other threads:[~2025-10-27 22:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-07 18:53 [PATCH] arm64: dts: qcom: sm8650: set ufs as dma coherent Neil Armstrong
2025-10-07 19:37 ` Dmitry Baryshkov
2025-10-08 2:57 ` Krzysztof Kozlowski
2025-10-27 22:37 ` Bjorn Andersson [this message]
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