G2UL - Not able to get 208 MHz in SDR104 Mode

Hello,

We are working on Smarc G2UL Type 1 EVK from Renesas and we have seen that we are not able to get exactly 208MHz of clock in SDR104 mode of the SD port but instead of that, we get 133 MHz clock in this mode.

Please see below the waveforms of the clock for G2UL Type 1 EVK.

We have designed our custom board as well based on G2UL Type 1 CPU and in our board also we are not able to get exactly 208 MHz clock in SDR104 mode but we get  only 100 MHz in our board.

Please see below the waveforms of the clock for G2UL Type 1 our custom board.

Please see below our custom board DTS changes.

    vmmc-supply = <&vdd_sd0>;
     vqmmc-supply = <&vccq_sdhi0>;
     bus-width = <4>;
-    sd-uhs-sdr50;
+   /*    sd-uhs-sdr50; */
     sd-uhs-sdr104;
     status = "okay";
     disable-wp;

Can you please suggest to us what may be a reason not to get the exact frequency as per SDR104 mode in both Renesas EVK as well in our custom board?

Thanks,

Brijesh K