linux-kernel - [PATCH 0/5] Add support for Verisilicon IOMMU used by media codec blocks

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Message-ID: <20250616145607.116639-1-benjamin.gaignard@collabora.com>
Date: Mon, 16 Jun 2025 16:55:48 +0200
From: Benjamin Gaignard <benjamin.gaignard@...labora.com>
To: joro@...tes.org,
	will@...nel.org,
	robin.murphy@....com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	heiko@...ech.de,
	nicolas.dufresne@...labora.com,
	p.zabel@...gutronix.de,
	mchehab@...nel.org
Cc: iommu@...ts.linux.dev,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-media@...r.kernel.org,
	kernel@...labora.com,
	Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: [PATCH 0/5] Add support for Verisilicon IOMMU used by media codec blocks

Hi all,

This patch series adds support for the Verisilicon IOMMU, which is found in front
of hardware encoder and decoder blocks in several SoCs using Verisilicon IP. 
A first implementation of this IOMMU is available on the Rockchip RK3588 SoC.

Rockchip provides a driver for this hardware in their 6.1 kernel branch:
https://github.com/rockchip-linux/kernel/blob/develop-6.1/drivers/iommu/rockchip-iommu-av1d.c

This series includes:
- a new binding for the Verisilicon IOMMU
- a basic driver implementation
- DT updates for RK3588
- integration with the Verisilicon VPU driver.

The driver was forward-ported from Rockchip’s 6.1 implementation, 
the prefix was renamed to vsi for generality, and several fixes were applied.

AV1 decoding was tested using the stateless VPU driver and Fluster.
The test results show a score of 205/239, which confirms that no regressions
were introduced by this series.

Feedback and testing welcome.

Thanks,
Benjamin

Benjamin Gaignard (5):
  dt-bindings: vendor-prefixes: Add Verisilicon
  dt-bindings: iommu: verisilicon: Add binding for VSI IOMMU
  iommu: Add verisilicon IOMMU driver
  arm64: dts: rockchip: Add verisilicon IOMMU node on RK3588
  media: verisilicon: Flush IOMMU before decoding a frame

 .../bindings/iommu/verisilicon,iommu.yaml     |  71 ++
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 arch/arm64/boot/dts/rockchip/rk3588-base.dtsi |  11 +
 drivers/iommu/Kconfig                         |   8 +
 drivers/iommu/Makefile                        |   1 +
 drivers/iommu/vsi-iommu.c                     | 900 ++++++++++++++++++
 .../media/platform/verisilicon/hantro_drv.c   |  11 +
 7 files changed, 1004 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iommu/verisilicon,iommu.yaml
 create mode 100644 drivers/iommu/vsi-iommu.c

-- 
2.43.0