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diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml new file mode 100644 index 000000000000..bf8082d87ac0 --- /dev/null +++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml @@ -0,0 +1,285 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/mediatek,vcodec-subdev-decoder.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek Video Decode Accelerator With Multi Hardware + +maintainers: + - Yunfei Dong <yunfei.dong@mediatek.com> + +description: | + MediaTek Video Decode Accelerator is the video decoding hardware present in + MediaTek SoCs that supports high-resolution decoding functionalities. + It consists of parent and child nodes. + + The decoder hardware block diagram is shown below: + + +------------------------------------------------+------------------------------+ + | | | + | input -> LAT-SoC HW -> LAT HW -> LAT buffer --|--> Core HW -> output buffer | + | || || | || | + +--------------||-----------||-------------------+-------||---------------------+ + LAT Workqueue | Core Workqueue <parent> + ---------------||-----------||-------------------|-------||---------------------- + ||<----------||---------HW index--------->|| <child> + \/ \/ \/ + +-------------------------------------------------------------+ + | enable/disable | + | clk power irq iommu | + | (lat/lat-soc/core0/core1) | + +-------------------------------------------------------------+ + + The child nodes represent the individual hardware blocks within the decoding + pipeline, such as LAT-SoC, LAT and Core. + Each child node is responsible for managing the dedicated resources of the + hardware, such as clocks, power domains, interrupts and IOMMUs. + + The parent node is a central point of control for the child nodes. + It identifies the specific video decoding pipeline architecture used by the + SoC, manages the shared resources like workqueues and platform data, and + handles V4L2 API calls on behalf of the underlying hardware. + + The parent utilizes two workqueues to manage the decoding process. + 1. LAT Workqueue, for LAT-SoC and LAT decoder: + Its workers take input bitstream and LAT buffer, enable the hardware for + decoding tasks, write the result to LAT buffer, and disable the hardware + after the LAT decoding is done. + 2. Core Workqueue, for Core decoder: + Its workers take LAT buffer and output buffer, enable the hardware for + decoding tasks, write the result to output buffer, and disable the hardware + after the Core decoding is done. + + These hardware decode each frame cyclically. + + The hardware might be associated with different SMI-common devices. + To prevent IOMMU faults during DRAM access in such cases, each hardware with + the unique SMI-common device must be placed under a separate parent node in + the device tree. + + LAT-SoC refers to another hardware block that connected to additional LARB + (local arbiter) ports, such as RDMA and UFO. + It requires independent power and clock control to work with LAT decoder, and + it doesn't have a dedicated interrupt. + + The used video decoding pipeline architecture across various Mediatek SoC: + MT8195: LAT-SoC + LAT + Core + MT8192: LAT + Core + MT8188: LAT + Core + MT8186: Core + +properties: + compatible: + enum: + - mediatek,mt8192-vcodec-dec + - mediatek,mt8186-vcodec-dec + - mediatek,mt8188-vcodec-dec + - mediatek,mt8195-vcodec-dec + + reg: + minItems: 1 + items: + - description: VDEC_SYS register space + - description: VDEC_RACING_CTRL register space + + iommus: + minItems: 1 + maxItems: 32 + description: | + List of the hardware port in respective IOMMU block for current Socs. + Refer to bindings/iommu/mediatek,iommu.yaml. + + mediatek,scp: + $ref: /schemas/types.yaml#/definitions/phandle + description: | + The node of system control processor (SCP), using + the remoteproc & rpmsg framework. + + "#address-cells": + const: 2 + + "#size-cells": + const: 2 + + ranges: true + +# Required child node: +patternProperties: + '^video-codec@[0-9a-f]+$': + type: object + + properties: + compatible: + enum: + - mediatek,mtk-vcodec-core + - mediatek,mtk-vcodec-lat + - mediatek,mtk-vcodec-lat-soc + + reg: + maxItems: 1 + description: VDEC_MISC register space + + interrupts: + maxItems: 1 + + iommus: + minItems: 1 + maxItems: 32 + description: | + List of the hardware port in respective IOMMU block for current Socs. + Refer to bindings/iommu/mediatek,iommu.yaml. + + clocks: + minItems: 4 + maxItems: 5 + + clock-names: + minItems: 4 + maxItems: 5 + + assigned-clocks: + maxItems: 1 + + assigned-clock-parents: + maxItems: 1 + + power-domains: + maxItems: 1 + + required: + - compatible + - reg + - iommus + - clocks + - clock-names + - assigned-clocks + - assigned-clock-parents + - power-domains + + additionalProperties: false + +required: + - compatible + - reg + - iommus + - mediatek,scp + - ranges + +if: + properties: + compatible: + contains: + enum: + - mediatek,mtk-vcodec-core + - mediatek,mtk-vcodec-lat + +then: + required: + - interrupts + +allOf: + - if: + properties: + compatible: + contains: + enum: + - mediatek,mt8192-vcodec-dec + then: + properties: + clock-names: + items: + - const: sel + - const: soc-vdec + - const: soc-lat + - const: vdec + - const: top + + - if: + properties: + compatible: + contains: + enum: + - mediatek,mt8195-vcodec-dec + then: + properties: + clock-names: + items: + - const: sel + - const: vdec + - const: lat + - const: top + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/memory/mt8192-larb-port.h> + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/clock/mt8192-clk.h> + #include <dt-bindings/power/mt8192-power.h> + + bus@16000000 { + #address-cells = <2>; + #size-cells = <2>; + ranges = <0 0x16000000 0x16000000 0 0x40000>; + + video-codec@16000000 { + compatible = "mediatek,mt8192-vcodec-dec"; + mediatek,scp = <&scp>; + iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>; + #address-cells = <2>; + #size-cells = <2>; + ranges = <0 0 0 0x16000000 0 0x40000>; + reg = <0 0x16000000 0 0x1000>; /* VDEC_SYS */ + video-codec@10000 { + compatible = "mediatek,mtk-vcodec-lat"; + reg = <0 0x10000 0 0x800>; + interrupts = <GIC_SPI 426 IRQ_TYPE_LEVEL_HIGH 0>; + iommus = <&iommu0 M4U_PORT_L5_VDEC_LAT0_VLD_EXT>, + <&iommu0 M4U_PORT_L5_VDEC_LAT0_VLD2_EXT>, + <&iommu0 M4U_PORT_L5_VDEC_LAT0_AVC_MV_EXT>, + <&iommu0 M4U_PORT_L5_VDEC_LAT0_PRED_RD_EXT>, + <&iommu0 M4U_PORT_L5_VDEC_LAT0_TILE_EXT>, + <&iommu0 M4U_PORT_L5_VDEC_LAT0_WDMA_EXT>, + <&iommu0 M4U_PORT_L5_VDEC_LAT0_RG_CTRL_DMA_EXT>, + <&iommu0 M4U_PORT_L5_VDEC_UFO_ENC_EXT>; + clocks = <&topckgen CLK_TOP_VDEC_SEL>, + <&vdecsys_soc CLK_VDEC_SOC_VDEC>, + <&vdecsys_soc CLK_VDEC_SOC_LAT>, + <&vdecsys_soc CLK_VDEC_SOC_LARB1>, + <&topckgen CLK_TOP_MAINPLL_D4>; + clock-names = "sel", "soc-vdec", "soc-lat", "vdec", "top"; + assigned-clocks = <&topckgen CLK_TOP_VDEC_SEL>; + assigned-clock-parents = <&topckgen CLK_TOP_MAINPLL_D4>; + power-domains = <&spm MT8192_POWER_DOMAIN_VDEC>; + }; + + video-codec@25000 { + compatible = "mediatek,mtk-vcodec-core"; + reg = <0 0x25000 0 0x1000>; + interrupts = <GIC_SPI 425 IRQ_TYPE_LEVEL_HIGH 0>; + iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_UFO_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_PP_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_PRED_RD_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_PRED_WR_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_PPWRAP_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_TILE_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_VLD_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_VLD2_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_AVC_MV_EXT>, + <&iommu0 M4U_PORT_L4_VDEC_RG_CTRL_DMA_EXT>; + clocks = <&topckgen CLK_TOP_VDEC_SEL>, + <&vdecsys CLK_VDEC_VDEC>, + <&vdecsys CLK_VDEC_LAT>, + <&vdecsys CLK_VDEC_LARB1>, + <&topckgen CLK_TOP_MAINPLL_D4>; + clock-names = "sel", "soc-vdec", "soc-lat", "vdec", "top"; + assigned-clocks = <&topckgen CLK_TOP_VDEC_SEL>; + assigned-clock-parents = <&topckgen CLK_TOP_MAINPLL_D4>; + power-domains = <&spm MT8192_POWER_DOMAIN_VDEC2>; + }; + }; + }; |