Il 16/06/25 04:56, Xueqi Zhang ha scritto:
> This patchset add mt8196 SMMU support.
> 1. Mediatek SMMU interrupt is low level active rather than the
> standard edge. Process Mediatek SMMU wrapper interrupt and dump
> detailed information when a translation fault occurs.
> 2. In some projects, Mediatek also have EL2 driver, so put the pm
> operation in TFA(EL3), then all the kernel and EL2 could control
> the pm. Thus implement rpm get/put function which send smc call to
> TFA to get/put SMMU power.
>
> Xueqi Zhang (8):
> dt-bindings: iommu: mediatek: Add mt8196 support
> iommu/arm-smmu-v3: Add SMMU implementation
> iommu/arm-smmu-v3: Add implementation for MT8196 MM SMMU
> iommu/arm-smmu-v3: Add implementation for MT8196 APU SMMU
> iommu/arm-smmu-v3: Add IRQ handle for smmu impl
> iommu/arm-smmu-v3: mediatek: Add wrapper handle for IRQ
> iommu/arm-smmu-v3: Invoke rpm operation before accessing the hw
> iommu/arm-smmu-v3: mediatek: Implement rpm get/put function
>
> .../bindings/iommu/arm,smmu-v3.yaml | 24 +-
> drivers/iommu/arm/Kconfig | 7 +
> drivers/iommu/arm/arm-smmu-v3/Makefile | 3 +-
> .../iommu/arm/arm-smmu-v3/arm-smmu-v3-impl.c | 16 +
> .../arm/arm-smmu-v3/arm-smmu-v3-mediatek.c | 536 ++++++++++++++++++
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 96 +++-
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 14 +
> 7 files changed, 691 insertions(+), 5 deletions(-)
> create mode 100644 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-impl.c
> create mode 100644 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-mediatek.c
>
Xueqi, any followup on this series?
All of the multimedia blocks (including display) become unusable without an IOMMU
on MT8196, MT6991 and newer.
Regards,
Angelo