On 03/05/2017 10:58 AM, Gailu Singh wrote:
Hi Again,
I tried to find out the details for following error
ata1: SATA link down (SStatus 4 SControl 300)
As per status register description
SStatus 4 : Phy in offline mode as a result of the interface being disabled or running in a BIST loopback mode
Is there any chance that coreboot/grub/Linux is putting SATA in to BIST loopback mode?
I am trying to understand who is responsible for SATA Linux status 4 and possible candidates are a) coreboot b) grub c) Linux
You already mentioned coreboot+tianocore worked fine under Linux. I think it is safe to assume the problem is not originating from the kernel. Why don't you check what tianocore does about SATA? I suspect tianocore may be injecting some ACPI tables for SATA controller which kernel picks up. Perhaps you can dump, decompile and compare asl from coreboot+tianocore and coreboot+grub and see what is different?
Andrey
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Andrey Petrov