DP83822HF: when set to 100M, DP83822 will lose packet, but 10M is OK.

Dears:

when set to 100M, DP83822 will lose packet, but 10M is OK. Could you please help check what need to be done to solve this issue ? Processor is imx6ull.

below is the configuration.

&fec2 {

                pinctrl-names = "default";

                pinctrl-0 = <&pinctrl_enet2&pinctrl_enet2_reset>;

                phy-mode = "rmii";

                phy-handle = <&ethphy1>;

                //phy-reset-gpios = <&gpio5 1 0>;

                status = "okay";

                mdio {

                                #address-cells = <1>;

                                #size-cells = <0>;

                                /*ethphy0: ethernet-phy@2 {

                                                compatible = "ethernet-phy-ieee802.3-c22";

                                                reg = <2>;

                                                micrel,led-mode = <1>;

                                                clocks = <&clks IMX6UL_CLK_ENET_REF>;

                                                clock-names = "rmii-ref";

                                };*/

                                ethphy1: ethernet-phy@1 {

                                                compatible = "ethernet-phy-ieee802.3-c22";

                                                reg = <1>;

                                };

                };

};