From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Douglas Anderson <dianders@chromium.org>, andersson@kernel.org
Cc: amit.pundir@linaro.org, Will Deacon <will@kernel.org>,
sumit.semwal@linaro.org, linux-arm-msm@vger.kernel.org,
konrad.dybcio@somainline.org,
linux-arm-kernel@lists.infradead.org,
Stephan Gerhold <stephan@gerhold.net>,
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
Nikita Travkin <nikita@trvn.ru>,
Stephen Boyd <swboyd@chromium.org>,
Sibi Sankar <quic_sibis@quicinc.com>,
Andy Gross <agross@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Das Srinagesh <quic_gurus@quicinc.com>,
Konrad Dybcio <konrad.dybcio@linaro.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Robert Marko <robimarko@gmail.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/4] dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent
Date: Sun, 18 Jun 2023 10:07:48 +0200 [thread overview]
Message-ID: <e89e574c-db6d-877b-462c-bb91cc9d9ff1@linaro.org> (raw)
In-Reply-To: <20230616081440.v2.1.Ie79b5f0ed45739695c9970df121e11d724909157@changeid>
On 16/06/2023 17:14, 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.
>
> Signed-off-by: Douglas Anderson <dianders@chromium.org
2
Best regards,
Krzysztof
next prev parent reply other threads:[~2023-06-18 8:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-16 15:14 Douglas Anderson
2023-06-16 15:14 ` [PATCH v2 2/4] arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for IDP Douglas Anderson
2023-06-16 15:14 ` [PATCH v2 3/4] arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for trogdor Douglas Anderson
2023-06-16 15:14 ` [PATCH v2 4/4] arm64: dts: qcom: sc7280: Mark SCM as dma-coherent for chrome devices Douglas Anderson
2023-06-18 8:07 ` Krzysztof Kozlowski [this message]
2023-06-19 10:00 ` [PATCH v2 1/4] dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent Konrad Dybcio
2023-06-19 10:01 ` Krzysztof Kozlowski
2023-06-19 10:01 ` Krzysztof Kozlowski
2023-06-21 16:56 ` Doug Anderson
2023-06-22 20:38 ` (subset) " Bjorn Andersson
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