linux-kernel - Re: (subset) [PATCH v2 1/4] dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent

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Date:   Thu, 22 Jun 2023 13:38:10 -0700
From:   Bjorn Andersson <andersson@...nel.org>
To:     Douglas Anderson <dianders@...omium.org>
Cc:     amit.pundir@...aro.org, Will Deacon <will@...nel.org>,
        sumit.semwal@...aro.org, linux-arm-msm@...r.kernel.org,
        konrad.dybcio@...ainline.org, linux-arm-kernel@...ts.infradead.org,
        Stephan Gerhold <stephan@...hold.net>,
        Nikita Travkin <nikita@...n.ru>,
        Stephen Boyd <swboyd@...omium.org>,
        Sibi Sankar <quic_sibis@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Das Srinagesh <quic_gurus@...cinc.com>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Robert Marko <robimarko@...il.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Manivannan Sadhasivam <mani@...nel.org>
Subject: Re: (subset) [PATCH v2 1/4] dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent


On Fri, 16 Jun 2023 08:14:38 -0700, Douglas Anderson wrote:
> Trogdor devices use firmware backed by TF-A instead of Qualcomm's
> normal TZ. On TF-A we end up mapping memory as cacheable. Specifically,
> you can see in Trogdor's TF-A code [1] in qti_sip_mem_assign() that we
> call qti_mmap_add_dynamic_region() with MT_RO_DATA. This translates
> down to MT_MEMORY instead of MT_NON_CACHEABLE or MT_DEVICE.
> 
> Let's allow devices like trogdor to be described properly by allowing
> "dma-coherent" in the SCM node.
> 
> [...]

Applied, thanks!

[1/4] dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent
      commit: c0877829ada0406233aee5bd54f6813db79d5f1f
[2/4] arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for IDP
      commit: 9a5f0b11e49e27f0a01a73c31d05df4a95bea3fa
[3/4] arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for trogdor
      commit: a54b7fa6b9ab6b4ecb7d9aba6b1a0ce1bcc961e3
[4/4] arm64: dts: qcom: sc7280: Mark SCM as dma-coherent for chrome devices
      commit: 7b59e8ae92fe089fed8ff1b23e53442ae5b204c9

Best regards,
-- 
Bjorn Andersson <andersson@...nel.org>