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SubjectRe: `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13 9360/9370
Hi Paul,

On Thu, May 17, 2018 at 03:34:49PM +0200, Paul Menzel wrote:
> Dear Heikki,
>
> Note, this problem also exists on the Dell XPS 13 9360 (Kaby Lake) device.

OK. Good to know. Though, we don't have one of those either.

> On 05/17/18 10:59, Heikki Krogerus wrote:
> > On Wed, May 16, 2018 at 04:13:31PM +0000, Mario.Limonciello@dell.com wrote:
> > >
> > >
> > > > -----Original Message-----
> > > > From: Heikki Krogerus [mailto:heikki.krogerus@linux.intel.com]
> > > > Sent: Wednesday, May 16, 2018 6:58 AM
> > > > To: Greg KH; Paul Menzel
> > > > Cc: linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org; Limonciello, Mario
> > > > Subject: Re: `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13
> > > > 9370
> > > >
> > > > Hi,
> > > >
> > > > On Wed, May 16, 2018 at 10:02:26AM +0200, Greg KH wrote:
> > > > > On Tue, May 15, 2018 at 06:47:37PM +0200, Paul Menzel wrote:
> > > > > > Dear Greg,
> > > > > >
> > > > > >
> > > > > > As always, thank you for the prompt response.
> > > > > >
> > > > > >
> > > > > > On 05/15/18 18:00, Greg KH wrote:
> > > > > > > On Tue, May 15, 2018 at 04:34:03PM +0200, Paul Menzel wrote:
> > > > > >
> > > > > > > > Linux 4.17-rc5 shows the error below on the Dell XPS 13 9370 with Debian
> > > > > > > > Sid/unstable.
> > > > > > > >
> > > > > > > > ```
> > > > > > > > [???]
> > > > > > > > [ 0.440240] usb: port power management may be unreliable
> > > > > > > > [ 0.441358] usbcore: registered new interface driver usb-storage
> > > > > > > > [ 0.441367] usbcore: registered new interface driver usbserial_generic
> > > > > > > > [ 0.441369] usbserial: USB Serial support registered for generic
> > > > > > > > [ 0.441383] ioremap error for 0x3f799000-0x3f79a000, requested 0x2, got
> > > > > > > > 0x0
> > > > > > > > [ 0.441518] ucsi_acpi: probe of USBC000:00 failed with error -12
> > > > > > > > [???]
> > > > > > > > ```
> > > > > > > >
> > > > > > > > 1. Are the ioremap and ucsi_acpi error related or is a separate report
> > > > > > > > needed?
> > > > > > >
> > > > > > > The ioremap error is what causes ucsi_acpi to fail the probe call (-12
> > > > > > > is "out of memory".)
> > > > > > >
> > > > > > > > 2. Do you know the reason for the ucsi_acpi error?
> > > > > > >
> > > > > > > the call to ioremap failed.
> > > > > > >
> > > > > > > Does this device really have a working typec connector?
> > > > > >
> > > > > > Just to avoid misunderstandings, no device was connected to the laptop
> > > > > > during my test.
> > > > > >
> > > > > > But, from other boots, the Dell docking station TB16 kind of works with it,
> > > > > > so I???d say the USB Type-C connector is working.
> > > > >
> > > > > Ok, good, this might just be the acpi tables not set up properly for
> > > > > this type of connection. Odd that the tables show it should work,
> > > > > Heikki should know more about this.
> > > >
> > > > The firmware probable has not implemented UCSI on this board. I think
> > > > Dell always supplies the ACPI device node for UCSI in their acpi
> > > > tables. The _STA method in that device node is then used to inform the
> > > > OS if the interface exists or not. The return value for _STA comes
> > > > probable from BIOS, so this is most likely a BIOS problem.
> > >
> > > Heikki,
> > >
> > > I confirmed with internal team that UCSI is implemented on XPS 9370
> > > and was confirmed to be working properly with Windows 10 RS2+.
> >
> > Just to double check: "UCSI was confirmed working properly", so not
> > "the Type-C ports were confirmed working properly"?
> >
> > > The reason that _STA is responding on this device node now but wasn't
> > > previously is it wasn't exposed in Linux until 4.16 when the Win 10 RS2
> > > OSI string started to respond.
> >
> > OK.
> >
> > > Intel should internally have some XPS 9370 you can remotely access if
> > > you would like to poke around ACPI tables some.
> >
> > I will try get access to XPS 9370, but with the acpi tables, if
> > somebody could just send me acpidump, that would be enough:
> >
> > % acpidump -o xps9370_acpi.dump
>
> I uploaded them to another bug report [1]. Please find it attached.

Thanks!


Br,

--
heikki

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