This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DM8147 SATA0 problem

Custom DM8147 board, connected to a Intel SSD drive, which was verified to work on DM8148EVM.

When kernel boots up, the drive is never detected, it always says:

ata1: SATA link down.

The circuit is same as the EVM, the impedance is carefully controlled. The circuit is so simple, I don't know where could be wrong.