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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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b15a5ce863
On MediaTek platforms with Multimedia MMU (M4U), a multimedia hardware can be assigned with a local arbiter (LARB) which has a maximum of 32 ports for MediaTek's IOMMU infrastructure. That means there can be at most 32 items in the iommus property in theory. Instead of relaxing the max item count every time a newly introduced device tree hits the limit, bump the number to 32 as an one-time effort. On the other hand, all existing and foreseeable JPEG decoder nodes at this point have at least 2 IOMMUs, so set minItems to 2 accordingly. Signed-off-by: Fei Shao <fshao@chromium.org> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
83 lines
1.9 KiB
YAML
83 lines
1.9 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/media/mediatek-jpeg-decoder.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: MediaTek JPEG Decoder
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maintainers:
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- Xia Jiang <xia.jiang@mediatek.com>
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description: |-
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Mediatek JPEG Decoder is the JPEG decode hardware present in Mediatek SoCs
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properties:
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compatible:
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oneOf:
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- items:
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- enum:
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- mediatek,mt8173-jpgdec
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- mediatek,mt2701-jpgdec
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- items:
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- enum:
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- mediatek,mt7623-jpgdec
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- mediatek,mt8188-jpgdec
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- const: mediatek,mt2701-jpgdec
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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maxItems: 2
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minItems: 2
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clock-names:
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items:
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- const: jpgdec-smi
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- const: jpgdec
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power-domains:
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maxItems: 1
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iommus:
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minItems: 2
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maxItems: 32
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description: |
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Points to the respective IOMMU block with master port as argument, see
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Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
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Ports are according to the HW.
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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- clock-names
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- power-domains
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- iommus
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/mt2701-clk.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/memory/mt2701-larb-port.h>
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#include <dt-bindings/power/mt2701-power.h>
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jpegdec: jpegdec@15004000 {
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compatible = "mediatek,mt2701-jpgdec";
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reg = <0x15004000 0x1000>;
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interrupts = <GIC_SPI 143 IRQ_TYPE_LEVEL_LOW>;
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clocks = <&imgsys CLK_IMG_JPGDEC_SMI>,
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<&imgsys CLK_IMG_JPGDEC>;
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clock-names = "jpgdec-smi",
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"jpgdec";
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power-domains = <&scpsys MT2701_POWER_DOMAIN_ISP>;
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iommus = <&iommu MT2701_M4U_PORT_JPGDEC_WDMA>,
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<&iommu MT2701_M4U_PORT_JPGDEC_BSDMA>;
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};
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