Re: How to proceed: usci_acpi: PPM init failed (-110)

[Heikki Krogerus <heikki.krogerus@linux.intel.com>]

Hi again,

I'm sorry for the super slow progress with this. Just a quick update.

On Sat, Feb 19, 2022 at 01:39:33AM +0100, Samuel Čavoj wrote:
> Hi
> 
> sorry about the delay.
> 
> On 2022-01-24 10:23, Heikki Krogerus wrote:
> > On Sat, Jan 22, 2022 at 12:21:29AM +0000, Samuel Čavoj wrote:
> > > Hi Heikki,
> > > 
> > > do you think we could get this back on track somehow? I'm not sure
> > > what to
> > > try next, do you have any ideas? Are there any tools to try and
> > > trace what
> > > the Windows driver does? Either from within Windows itself or
> > > intercept it
> > > somehow externally -- a hypervisor approach? Are there any tools
> > > developed
> > > for this purpose? I wasn't really able to find much.
> > 
> > I don't have any ideas right now, but I'll try to think of something
> > that we could try. I'll also see if I can get my hands on one of those
> > Asus Zenbook laptops. It was a Zenbook 13, right?
> 
> Yup, it's a Zenbook 13 OLED (UM325).

So, I'm not able to get one of those unfortunately.

> > Did you try to see what happens if you don't reset the "PPM"?
> 
> No difference, as far as I can tell. I used the patch below to
> get more output. This is right after boot, in the initramfs:
> 
> [    0.787887] ucsi_acpi USBC000:00: hi ucsi here
> [    0.787893] ucsi_acpi USBC000:00: skipping reset
> [    0.787894] ucsi_acpi USBC000:00: enable basic notifications
> [    0.813169] ucsi_acpi USBC000:00: got notification:
> [    0.814386] ucsi_acpi USBC000:00:     checking ua->flags: 2, cci: 0
> [    1.859334] ucsi_acpi USBC000:00: PPM init failed (-110)
> 
> Same output after cold boot, reboot from linux and reboot from windows.

Based on that output, there is a notification, and I'm assuming that
notification is for the command completion. But CCI is 0?

That could be because the mailbox in memory is not getting
synchronised for some reason, but it could also mean that the EC
firmware is really not writing anything to the CCI. Both cases
probable mean we are missing some extra step that Windows is doing,
but what... I have no idea.

thanks,

-- 
heikki