AP6356S的5G传输速率偏低怎么解决？

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甘璐妲

2022-3-2 16:14:51

现象：

rk3288上使用新的wifi芯片AP6356S做2.4G/5G的传输速率测试，结果与rk3399上AP6356S相差一倍。

原因：
rk3288默认参考设计使用的sdio 2.0, 也就是clock最大是50MHz，而rk3399上使用的是sdio 3.0，也就最大clock是150MHz。

rk3288:

&sdio {
      clock-frequency = <50000000>;
      clock-freq-min-max = <200000 50000000>;
      supports-highspeed;
      supports-sdio;
      ignore-pm-notify;
      keep-power-in-suspend;
      //cap-sdio-irq;
      status = "okay";
};

rk3399:

&sdio0 {
clock-frequency = <150000000>;
clock-freq-min-max = <200000 150000000>;
supports-sdio;
bus-width = <4>;
disable-wp;
cap-sd-highspeed;
cap-sdio-irq;
keep-power-in-suspend;
mmc-pwrseq = <&sdio_pwrseq>;
non-removable;
num-slots = <1>;
pinctrl-names = "default";
pinctrl-0 = <&sdio0_bus4 &sdio0_cmd &sdio0_clk>;
sd-uhs-sdr104;
status = "okay";
};

解决方法: