Based on tag: next-20251017, linux-next/master
This patchset adds MT8189 iommu support.
MT8189 have 3 IOMMU HWs. 1 IOMMU HW is for multimedia,
1 IOMMU HW is for apu(AI processer unit),
and 2 IOMMU HW is for infra-master, like PCIe/USB.
About the INFRA IOMMU, it don't have larbs, the master connects the
iommu directly. It use a independent pgtable, and these two
INFRA IOMMU HW share a pgtable.
In mt8189, the display connect with larb1 and larb2 at the same time.
Thus, we should add link between disp-dev with these two larbs.
The software solutions can be summarized as follows:
1. Add iommu support for mt8189
2. Add a flag DL_WITH_MULTI_LARB to support the HW which connect with
multiple larbs.
---
Changes in v4:
- Move mt8189 after mt8188 in enum mtk_iommu_plat
- Link to v3:
https://lore.kernel.org/all/20251015125532.9041-1-zhengnan.chen@mediatek.com/
Changes in v3:
- Exclude the mediatek,larbs attribute of apu iommu in mediatek,iommu.yaml
- Link to v2:
https://lore.kernel.org/all/20251015032509.5057-1-zhengnan.chen@mediatek.com/
Changes in v2:
- Split mt8189 iommu support patch into three patches, namely APU IOMMU,
INFRA IOMMU and MM IOMMU
- Disable bank 4 of MM IOMMU
- Link to v1:
https://lore.kernel.org/all/20250807095756.11840-1-zhengnan.chen@mediatek.com/
---
Zhengnan Chen (5):
dt-bindings: mediatek: mt8189: Add bindings for MM & APU & INFRA IOMMU
iommu/mediatek: Add a flag DL_WITH_MULTI_LARB
iommu/mediatek: mt8189: Add APU IOMMUs support
iommu/mediatek: mt8189: Add INFRA IOMMUs support
iommu/mediatek: mt8189: Add MM IOMMUs support
.../bindings/iommu/mediatek,iommu.yaml | 8 +
drivers/iommu/mtk_iommu.c | 132 +++++++-
.../memory/mediatek,mt8189-memory-port.h | 283 ++++++++++++++++++
3 files changed, 410 insertions(+), 13 deletions(-)
create mode 100644 include/dt-bindings/memory/mediatek,mt8189-memory-port.h
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2.46.0