步骤一

参考《屏配置的几个方式》章节,先使用edid的方式,在dts里面写入:

panel: panel {
    compatible = "simple-panel";
    ddc-i2c-bus = <&panelddc>;
    power-supply = <&vdd_pnl_reg>;
    enable-gpios = <&gpio 90 0>;
    backlight = <&backlight>;
};

如果屏的edid正常, power, gpio, backlight配置正常,应该就能看到显示了。

步骤二

由于屏的edid是有机率损坏的,做产品是有风险的,所以建议把timing写死到代码里面:

完成步骤一后,可以从uboot串口上获取当前的屏的信息:

Maximum visible display size: 26 cm x 17 cm
Power management features: no active off, no suspend, no standby
Estabilished timings:
Standard timings:
        2400x1600       59 Hz (detailed)
Monitor name: LQ123P1JX31
Detailed mode clock 252750 kHz, flags[a]
    H: 2400 2448 2480 2560
    V: 1600 1603 1613 1646
bus_format: 1009

参考《屏配置的几个方式》章节, 屏配置方式一, 将该timing写死到kernel中.

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