For Auto configure mode DDRMC_PHY03[DLL_START_POINT] you can set it to 0x04.
This value will be the starting point for the phase detector which will lock at a certain value called DLL_LOCK_VALUE which indicates the delay of one cycle.
The number of delay elements that are needed to capture an entire clock cycle is then converted into an unsigned integer named encoder [7:0]
Let say the period of 1 cycle is 100ms and encoder = 100.
Hence each delay element delays the signal 1ms and encoder = 100 which means that 100 delay elements are needed to delay the signal one complete cycle (100ms)
The actual delay setting for the delay lines is calculated by multiplying the encoder [7:0] integer by the parameter settings for each delay line and then dividing by 128 and rounding.
So if you want to delay the signal 25 ms, you need to set DDRMC_PHY04[DLL_WRITE_D] = 0x20 = 32
Numer of delay elemets DLL_WRITE_DL/128 * ENCODER = 32/128 * 100 = 25
This means internally 25 delay elements (of 1ms) will be used to delay the signal 25ms
In conclusion you still need to set DDRMC_PHY04[DLL_WRITE_D] to express the percentage (DLL_WRITE_D/128) you want to delay the output signal
