RK3568 lt6911 HDMI转MIPI 采集问题_问答

现在需要使用rk3568采集HDMI视频，参看内核源码发现RK实现了lt6911uxc, 并且在设备树rk3568-evb2-lp4x-v10.dtsi 文件里面找到了参考：

&i2c3 {
    status = "okay";
    lt6911uxc: lt6911uxc@2b {
        status = "okay";
        reg = <0x2b>;
        compatible = "lontium,lt6911uxc";
        clocks = <&ext_cam_clk>;
        clock-names = "xvclk";
        interrupt-parent = <&gpio4>;
        interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
        power-gpios = <&gpio0 29 GPIO_ACTIVE_HIGH>;
        reset-gpios = <&gpio4 26 GPIO_ACTIVE_LOW>;
        plugin-det-gpios = <&gpio0 30 GPIO_ACTIVE_LOW>;
        hpd-ctl-gpios = <&gpio3 27 GPIO_ACTIVE_LOW>;
        rockchip,camera-module-index = <0>;
        rockchip,camera-module-facing = "back";
        rockchip,camera-module-name = "LT6911UXC";
        rockchip,camera-module-lens-name = "NC";
        port {
            lt6911uxc_out: endpoint {
                remote-endpoint = <&hdmi_to_mipi_in>;
                data-lanes = <1 2 3 4>;
            };
        };
    };
};

1)虽然有设备树参看，但是在设计原理图只拉了reset-gpios脚和MIPI_INT 脚，对于plugin-det-gpios 和 hpd-ctl-gpios起的作用现在不知道。
2)因为没有配置上述哪些脚，驱动加载就直接失败了。

[    1.754549] m00_b_LT6911UXC 1-002b: cfg lt6911uxc irq!
[    1.755155] LT6911UXC 1-002b: failed to get plugin det irq
[    1.755424] LT6911UXC: probe of 1-002b failed with error -22