Reviewed-by: Steve Cho <stevecho@xxxxxxxxxxxx> On Wed, Dec 1, 2021 at 7:46 PM Yunfei Dong <yunfei.dong@xxxxxxxxxxxx> wrote: > > Adds decoder dt-bindings for mt8192. basic question: what is dt-bindings? Is this yaml file supposed to be used for some settings? > > Signed-off-by: Yunfei Dong <yunfei.dong@xxxxxxxxxxxx> > --- > .../media/mediatek,vcodec-subdev-decoder.yaml | 266 ++++++++++++++++++ > 1 file changed, 266 insertions(+) > create mode 100644 Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml > > 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..67cbcf8b3373 > --- /dev/null > +++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml > @@ -0,0 +1,266 @@ > +# 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 Is Multi Hardware supposed to mean parent & child devices in this context? > + > +maintainers: > + - Yunfei Dong <yunfei.dong@xxxxxxxxxxxx> > + > +description: | > + Mediatek Video Decode is the video decode hardware present in Mediatek > + SoCs which supports high resolution decoding functionalities. Required > + parent and child device node. > + > + About the Decoder Hardware Block Diagram, please check below: Great to see this diagram and description! > + > + +---------------------------------+------------------------------------+ > + | | | > + | input -> lat HW -> lat buffer --|--> lat buffer -> core HW -> output | > + | || | || | > + +------------||-------------------+---------------------||-------------+ > + lat workqueue | core workqueue <parent> > + -------------||-----------------------------------------||------------------ > + || || <child> > + \/ <----------------HW index-------------->\/ > + +------------------------------------------------------+ > + | enable/disable | > + | clk power irq iommu | > + | (lat/lat soc/core0/core1) | > + +------------------------------------------------------+ > + > + As above, there are parent and child devices, child mean each hardware. The child device > + controls the information of each hardware independent which include clk/power/irq. > + > + There are two workqueues in parent device: lat workqueue and core workqueue. They are used > + to lat and core hardware deocder. Lat workqueue need to get input bitstream and lat buffer, > + then enable lat to decode, writing the result to lat buffer, dislabe hardware when lat decode > + done. Core workqueue need to get lat buffer and output buffer, then enable core to decode, > + writing the result to output buffer, disable hardware when core decode done. These two > + hardwares will decode each frame cyclically. > + > + For the smi common may not the same for each hardware, can't combine all hardware in one node, > + or leading to iommu fault when access dram data. > + > +properties: > + compatible: > + const: mediatek,mt8192-vcodec-dec > + > + reg: > + 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. > + > + mediatek,scp: > + $ref: /schemas/types.yaml#/definitions/phandle > + maxItems: 1 > + description: | > + The node of system control processor (SCP), using > + the remoteproc & rpmsg framework. > + $ref: /schemas/remoteproc/mtk,scp.yaml > + > + dma-ranges: > + maxItems: 1 > + description: | > + Describes the physical address space of IOMMU maps to memory. > + > + "#address-cells": > + const: 1 > + > + "#size-cells": > + const: 1 > + > + ranges: true > + > +# Required child node: > +patternProperties: > + vcodec-lat: > + type: object > + > + properties: > + compatible: > + const: mediatek,mtk-vcodec-lat > + > + reg: > + maxItems: 1 > + > + 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: > + maxItems: 5 > + > + clock-names: > + items: > + - const: sel > + - const: soc-vdec > + - const: soc-lat > + - const: vdec > + - const: top > + > + assigned-clocks: > + maxItems: 1 > + > + assigned-clock-parents: > + maxItems: 1 > + > + power-domains: > + maxItems: 1 > + > + required: > + - compatible > + - reg > + - interrupts > + - iommus > + - clocks > + - clock-names > + - assigned-clocks > + - assigned-clock-parents > + - power-domains > + > + additionalProperties: false > + > + vcodec-core: > + type: object > + > + properties: > + compatible: > + const: mediatek,mtk-vcodec-core > + > + reg: > + maxItems: 1 > + > + 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: > + maxItems: 5 > + > + clock-names: > + items: > + - const: sel > + - const: soc-vdec > + - const: soc-lat > + - const: vdec > + - const: top > + > + assigned-clocks: > + maxItems: 1 > + > + assigned-clock-parents: > + maxItems: 1 > + > + power-domains: > + maxItems: 1 > + > + required: > + - compatible > + - reg > + - interrupts > + - iommus > + - clocks > + - clock-names > + - assigned-clocks > + - assigned-clock-parents > + - power-domains > + > + additionalProperties: false > + > +required: > + - compatible > + - reg > + - iommus > + - mediatek,scp > + - dma-ranges > + - ranges > + > +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> > + > + video-codec@16000000 { > + compatible = "mediatek,mt8192-vcodec-dec"; > + mediatek,scp = <&scp>; > + iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>; > + dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges = <0 0x16000000 0x40000>; > + reg = <0x16000000 0x1000>; /* VDEC_SYS */ > + vcodec-lat@10000 { > + compatible = "mediatek,mtk-vcodec-lat"; > + reg = <0x10000 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>; > + }; > + > + vcodec-core@25000 { > + compatible = "mediatek,mtk-vcodec-core"; > + reg = <0x25000 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>; > + }; > + }; > -- > 2.25.1 >
