linux-kernel - [PATCH v2 0/5] MT8189 IOMMU SUPPORT

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Message-ID: <20251015032509.5057-1-zhengnan.chen@mediatek.com>
Date: Wed, 15 Oct 2025 11:24:16 +0800
From: Zhengnan Chen <zhengnan.chen@...iatek.com>
To: Yong Wu <yong.wu@...iatek.com>, Joerg Roedel <joro@...tes.org>, "Will
 Deacon" <will@...nel.org>, Robin Murphy <robin.murphy@....com>, Rob Herring
	<robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
	<conor+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
CC: <iommu@...ts.linux.dev>, <linux-mediatek@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>, Zhengnan Chen
	<zhengnan.chen@...iatek.com>
Subject: [PATCH v2 0/5] MT8189 IOMMU SUPPORT

Based on tag: next-20251015, 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 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        |   7 +
 drivers/iommu/mtk_iommu.c                     | 132 +++++++-
 .../memory/mediatek,mt8189-memory-port.h      | 283 ++++++++++++++++++
 3 files changed, 409 insertions(+), 13 deletions(-)
 create mode 100644 include/dt-bindings/memory/mediatek,mt8189-memory-port.h

-- 
2.46.0