Dear Hans, Rob and Maintainers, Much appreciated for reviewing this patchset, we have sent PATCH-V3 for the patchset with Rob's comments: https://patchwork.kernel.org/project/linux-mediatek/cover/20210412124555.26897-1-irui.wang@xxxxxxxxxxxx/ Just Gentle ping for this V3 patch. Thanks, Best Regards On Thu, 2021-04-29 at 13:15 +0200, Hans Verkuil wrote: > Hi Rob, > > On 01/03/2021 07:45, Irui Wang wrote: > > On Wed, 2021-02-10 at 16:53 -0600, Rob Herring wrote: > >> On Wed, Feb 03, 2021 at 04:37:48PM +0800, Irui Wang wrote: > >>> Adds dma-ranges property for DMA addresses translation. > >>> > >>> Signed-off-by: Irui Wang <irui.wang@xxxxxxxxxxxx> > >>> --- > >>> Documentation/devicetree/bindings/media/mediatek-vcodec.txt | 2 ++ > >>> 1 file changed, 2 insertions(+) > >>> > >>> diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt > >>> index f85276e629bf..e4644f8caee9 100644 > >>> --- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt > >>> +++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt > >>> @@ -23,6 +23,8 @@ Required properties: > >>> - iommus : should point to the respective IOMMU block with master port as > >>> argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt > >>> for details. > >>> +- dma-ranges : describes how the physical address space of the IOMMU maps > >>> + to memory. > >> > >> dma-ranges is supposed to be in a bus/parent node. > > Dear Rob, > > > > The mt8192 iommu support 0~16GB iova. We separate it to four banks: > > 0~4G; 4G~8G; 8G~12G; 12G~16G. > > > > The "dma-ranges" could be used to adjust the bank we locate. > > If we don't set this property. The default range always is 0~4G. > > > > Here we don't have actual bus/parent concept here. And the iova > > requirement is for our HW. Thus put the property in our node. > > > > Is this OK? If this is ok for you, I will put this message in the commit > > message and binding in next version. > > Can you answer Irui's question? Just a reminder... > > Much appreciated! > > Regards, > > Hans > > > > > Regards > >> > >>> One of the two following nodes: > >>> - mediatek,vpu : the node of the video processor unit, if using VPU. > >>> - mediatek,scp : the node of the SCP unit, if using SCP. > >>> -- > >>> 2.25.1 > >>> > > >
