[coreboot] [PATCH] watchdog mcp55's codec initialization loops

Stefan Reinauer stefan.reinauer at coresystems.de
Thu May 13 16:42:40 CEST 2010

On 5/12/10 5:12 PM, Joe Korty wrote:
> Put a 1 msec watchdog on the mcp55's codec status-wait
> loops.
> This 'fixes' a coreboot lockup I saw on my SuperMicro
> H8DME-2 with AMD 2222 Processors installed.
> For some reason the codec is being found but the
> subsequent initialization sequence is not able to
> initialize the device.
> Hopefully a 1 msec watchdog is long enough for a found
> codec.  If not it can be made longer but hopefully it
> can be kept much shorter than 1 second as excessively
> long timeouts make it difficult to use coreboot as a
> 'quick boot' mechanism.
Hi Joe,

the MCP55 azalia init code is kind of crude. I fixed the code for ICH7 a
while ago and now I ported my version of the Azalia code to MCP55 /
H8DME (assuming that's the board target you use for the H8DME-2)
Can you please see if this is any better than before? It's likely that
the verb table won't match the codec used on that board, but there only
was a single codec in the mcp55 driver and the used codec is usually
mainboard dependent, not chipset dependent.


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