The Security Freeze state only prevents changes to the security settings but if the drive is locked then you will not have access or be able to make any changes to the drive.
The BIOS and OS will put the drive in the Security Freeze state most of the time. Most Linux versions will not put in this state when coming out of sleep.
The drive should only be in the Locked state if the drive has an ATA password assigned (either the Master or User password). You may need to make sure the correct password is entered when the system boots.