On 26.10.2024 8:18 PM, Dmitry Baryshkov wrote: > On Fri, Oct 25, 2024 at 06:45:01PM +0200, Konrad Dybcio wrote: >> On 25.10.2024 1:06 PM, Dmitry Baryshkov wrote: >>> On Fri, Oct 25, 2024 at 10:54:24AM +0200, Konrad Dybcio wrote: >>>> On 25.10.2024 5:07 AM, Qingqing Zhou wrote: >>>>> Add the APPS SMMU node for QCS615 platform. Add the dma-ranges >>>>> to limit DMA address range to 36bit width to align with system >>>>> architecture. >>>>> >>>>> Signed-off-by: Qingqing Zhou <quic_qqzhou@xxxxxxxxxxx> >>>>> --- >>>> >>>> You probably also want to mark it `dma-coherent` (see e.g. >>>> x1e80100.dtsi) >>> >>> Is it? I don't think SM6150 had dma-coherent SMMU, at least it wasn't >>> marked as such. >> >> I don't think I have any documentation on this, so.. one way to find out! > > I don't have qcs615 at hand, so a purely theoretical question. But how > should it break if we mark it as dma-coherent, while it is not? The board will hang rather quickly Konrad
