On Mon, Sep 03, 2018 at 02:01:30PM +0800, Yong Wu wrote: > This patch adds decriptions for mt8183 IOMMU and SMI. > > mt8183 has one M4U like mt8173 and is also MTK IOMMU gen2 which > uses ARM Short-Descriptor translation table format. > > The mt8183 M4U-SMI HW diagram is as below: > > EMI > | > M4U > | > ---------- > | | > gals0-rx gals1-rx > | | > | | > gals0-tx gals1-tx > | | > ------------ > SMI Common > ------------ > | > +-----+-----+--------+-----+-----+-------+-------+ > | | | | | | | | > | | gals-rx gals-rx | gals-rx gals-rx gals-rx > | | | | | | | | > | | | | | | | | > | | gals-tx gals-tx | gals-tx gals-tx gals-tx > | | | | | | | | > larb0 larb1 larb2 larb3 larb4 larb5 larb6 CCU > disp vdec IPU0 IPU1 venc IPU1 cam > > All the connections are HW fixed, SW can NOT adjust it. > > Compared with mt8173, we add a GALS(Global Async Local Sync) module > between SMI-common and M4U, and additional between larb2/3/5/6 and > SMI-common. GALS can help synchronize for the modules in different > clock frequence, it can be seen as a "asynchronous fifo".
s/frequence/frequency/ > GALS can only help transfer the command/data while it don't have the > register, thus it has the special "smi" clock and it don't have the > "apb" clock. From the diagram above, we add "gals0" and "gals1" > clockes for smi-common and add a "gals" clock for smi-larb. s/clockes/clocks/ s/don't/doesn't/ > From the diagram above, CCU(Camera Control Unit) is connected with > smi-common directly, we can look it as "larb7" but its register space > is different with the normal larb. > > Signed-off-by: Yong Wu <yong...@mediatek.com> > --- > .../devicetree/bindings/iommu/mediatek,iommu.txt | 15 ++- > .../memory-controllers/mediatek,smi-common.txt | 11 +- > .../memory-controllers/mediatek,smi-larb.txt | 3 + > include/dt-bindings/memory/mt8183-larb-port.h | 130 > +++++++++++++++++++++ > 4 files changed, 153 insertions(+), 6 deletions(-) > create mode 100644 include/dt-bindings/memory/mt8183-larb-port.h With those fixed, Reviewed-by: Rob Herring <r...@kernel.org> _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
