Messages in this thread | | | Date | Mon, 19 Jun 2023 12:00:07 +0200 | Subject | Re: [PATCH v2 1/4] dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent | From | Konrad Dybcio <> |
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On 18.06.2023 10:07, Krzysztof Kozlowski wrote: > 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 Forgot to press alt or something
Konrad > > Best regards, > Krzysztof >
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