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AM5726: Abnormal access to SATA SSD

Part Number: AM5726

Hi experts

The AM5726 is using SATA to connect to the SSD , and there is a problem that SSD cannot be accessed.

It will return to normal after restarting the device, and there will be no abnormal serial port printing information (such as disk repair, etc.) when restarting;
Kernel version 4.1.18, using SATA SSD;

AM5726 SR2.0

The serial port information is as follows:

Normal register information:

Register information when an exception occurs:

It looks like something is wrong with SATA_PxCMD and SATA_PxSIG, is this due to interference? What could be the reason for the problem? Is there a way to restore it online?