Messages in this thread | | | Date | Mon, 19 Jun 2023 12:01:06 +0200 | Subject | Re: [PATCH v2 1/4] dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent | From | Krzysztof Kozlowski <> |
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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> > ---
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Best regards, Krzysztof
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