72 lines
2.0 KiB
Plaintext
72 lines
2.0 KiB
Plaintext
Amlogic Video Decoder
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================================
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The video decoding IP lies within the DOS memory region,
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except for the hardware bitstream parser that makes use of an undocumented
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region.
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It makes use of the following blocks:
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- ESPARSER is a bitstream parser that outputs to a VIFIFO. Further VDEC blocks
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then feed from this VIFIFO.
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- VDEC_1 can decode MPEG-1, MPEG-2, MPEG-4 part 2, MJPEG, H.263, H.264, VC-1.
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- VDEC_HEVC can decode HEVC and VP9.
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Both VDEC_1 and VDEC_HEVC share the "vdec" IRQ and as such cannot run
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concurrently.
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Device Tree Bindings:
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---------------------
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VDEC: Video Decoder
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--------------------------
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Required properties:
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- compatible: value should be different for each SoC family as :
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- GXBB (S905) : "amlogic,gxbb-vdec"
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- GXL (S905X, S905D) : "amlogic,gxl-vdec"
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- GXM (S912) : "amlogic,gxm-vdec"
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- reg: base address and size of he following memory-mapped regions :
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- dos
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- esparser
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- reg-names: should contain the names of the previous memory regions
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- interrupts: should contain the following IRQs:
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- vdec
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- esparser
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- interrupt-names: should contain the names of the previous interrupts
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- amlogic,ao-sysctrl: should point to the AOBUS sysctrl node
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- amlogic,canvas: should point to a canvas provider node
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- clocks: should contain the following clocks :
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- dos_parser
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- dos
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- vdec_1
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- vdec_hevc
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- clock-names: should contain the names of the previous clocks
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- resets: should contain the parser reset
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- reset-names: should be "esparser"
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Example:
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vdec: video-decoder@c8820000 {
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compatible = "amlogic,gxbb-vdec";
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reg = <0x0 0xc8820000 0x0 0x10000>,
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<0x0 0xc110a580 0x0 0xe4>;
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reg-names = "dos", "esparser";
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interrupts = <GIC_SPI 44 IRQ_TYPE_EDGE_RISING>,
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<GIC_SPI 32 IRQ_TYPE_EDGE_RISING>;
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interrupt-names = "vdec", "esparser";
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amlogic,ao-sysctrl = <&sysctrl_AO>;
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amlogic,canvas = <&canvas>;
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clocks = <&clkc CLKID_DOS_PARSER>,
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<&clkc CLKID_DOS>,
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<&clkc CLKID_VDEC_1>,
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<&clkc CLKID_VDEC_HEVC>;
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clock-names = "dos_parser", "dos", "vdec_1", "vdec_hevc";
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resets = <&reset RESET_PARSER>;
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reset-names = "esparser";
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};
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