61 lines
2.4 KiB
Plaintext
61 lines
2.4 KiB
Plaintext
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* Qualcomm MSM VPU
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VPU (Video Processing Unit) applies high quality video post-processing
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functions like noise reduction, deinterlacing, scaling, etc in real-time
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on streaming video.
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Required properties:
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- compatible:
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- "qcom,vpu"
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- reg: Specify offset and length of the device register sets.
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- reg-names: Names corresponding to the defined register sets.
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- "vpu_csr": CSR registers
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- "vpu_smem": Shared memory
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- "vpu_vbif": VBIF registers (optional)
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- interrupts: Specify the vpu interrupts.
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- interrupt-names: Names corresponding to the defined interrupts list.
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- "vpu_wdog": Watchdog interrupt
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- "vpu_hfi": Firmware to Host interrupt
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- clock-names: Array of clocks that the driver requires for the device.
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The names here correspond to the clock names used in clk_get(<name>).
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- qcom,bus-load-vector-tbl: Vectors of <load, ab, ib>. The (ab,ib) pairs are
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ddr bus bandwidths to be requested at corresponding video processing load.
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Vectors should be in ascending order of load, and their number is variable.
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- vdd-supply: regulator that supplies the vpu.
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Optional properties:
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- qcom,enabled-iommu-maps: List of IOMMU maps to be enabled, defined by name.
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If this property is not defined or invalid, then device assumes contiguous
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buffers. Valid iommu names are:
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- "vpu_nonsecure": IOMMU for accessing non-secure video buffers.
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- "vpu_secure": IOMMU for accessing secure video buffers.
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- "vpu_firmware": IOMMU for loading firmware image.
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- qcom,vbif-reg-presets: List of offset-value pairs for VBIF registers to be
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programmed. The offsets are from the base register specified in 'vpu_vbif'.
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This is used to program default register values for QoS settings, etc.
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Example:
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qcom,vpu@fdc00000 {
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compatible = "qcom,vpu";
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reg = <0xfdc00000 0xff000>,
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<0xbfe00000 0x100000>;
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reg-names = "vpu_csr", "vpu_smem";
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interrupts = <0 44 0>, <0 45 0>;
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interrupt-names = "vpu_wdog", "vpu_hfi";
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clock-names = "core_clk", "bus_clock", "iface_clk";
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qcom,maple-clk-load-freq-tbl = <100000 50000000>,
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<500000 400000000>;
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qcom,vdp-clk-load-freq-tbl = <200000 100000000>,
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<400000 320000000>;
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qcom,bus-clk-load-freq-tbl = <100000 40000000>,
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<200000 80000000>;
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qcom,bus-load-vector-tbl = <0 0 0>,
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<489600 536000 1600000>,
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<979200 2024000 1600000>;
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qcom,enabled-iommu-maps = "vpu_nonsecure", "vpu_secure";
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qcom,vbif-reg-presets = <0xb0138 0x43ff>,
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<0xb0178 0xff12350e>;
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vdd-supply = <&gdsc_vpu>;
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};
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