This Design enable Xilinx Frame buffer read and Frame buffer write works as Mem 2 Mem Device. This design do not have other subdevice so the design just use in pass through mode to copy memory from one place to other.
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This reference design is with ZCU102
Device tree binding
The dts node should be defined with correct configuration. The common dts properties are described in video.txt
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v_frmbuf_wr_0: v_frmbuf_wr@a0000000 {
compatible = "xlnx,axi-frmbuf-wr-v2";
#dma-cells = <1>;
interrupt-parent = <&gic>;
interrupts = <0 89 4>;
reg = <0x0 0xa0000000 0x0 0x10000>;
reset-gpios = <&gpio 79 1>;
xlnx,dma-addr-width = <32>;
xlnx,vid-formats = "rgb888", "bgr888", "nv16", "yuyv", "nv12";
};
v_frmbuf_rd_0: v_frmbuf_rd@a0010000 {
compatible = "xlnx,axi-frmbuf-rd-v2";
#dma-cells = <1>;
interrupt-parent = <&gic>;
interrupts = <0 90 4>;
reg = <0x0 0xa0010000 0x0 0x10000>;
reset-gpios = <&gpio 78 1>;
xlnx,dma-addr-width = <32>;
xlnx,vid-formats = "rgb888", "bgr888", "nv16", "yuyv", "nv12";
};
video_m2m {
compatible = "xlnx,mem2mem";
dmas = <&v_frmbuf_rd_0 0>, <&v_frmbuf_wr_0 0>;
dma-names = "tx", "rx";
};
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gst-launch-1.0 videotestsrc num-buffers=10 ! video/x-raw, width=1920, height=1080, format=RGB ! v4l2video0convert capture-io-mode=4 output-io-mode=4 disable_passthrough=1 ! video/x-raw, width=1920, height=1080, format=RGB ! filesink location=tmp0.yuy2rgb |