TSE ff_rx_data problem

I think you are right Mr. Dai.

RGMII Transmit Data. In RGMII mode,. RXD[3:0] are used as RD[3:0]. In RGMII mode, RXD[3:0] run at double data rate with bits [3:0] presented on the rising edge of RX_CLK, and bits[7:4] presented on the falling edge of RX_CLK. In this mode, RXD[7:4] are ignored.

In RGMII 10/100BASE-T mdoes, the transmit data nibble is presented on RXD[3:0] on the rising edge of RX_CLK.

As said on ds, now the PHY is operating in 100BASE-T mode ( I don't know why, because i've set set_1000 to 1). data is presented on rising edge of clk.

But what is don't understand is that when it's in RGMII giga mode. though RXD[3:0] is running at double data rate, but only bits[3:0] are presented on rising edge, and bits[7:4] which presented on falling edge are ignored. Is that means either in giga mode or 10/100 base-t mode, we can only fetch data on rising edge? If so, how come TSE would think that the PHY will give out DDR signal?

I am confused, please light me.