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. Please note that UCSI will only supply status information to the operating system, so the USB Type-C ports will function normally even without it. The ports are handled in firmware on these platforms. Paul, do you have the latest BIOS? > > > Does normal USB devices work with it? > > > > Sorry for being ignorant, but could you please tell me what normal USB > > devices are? > > If you plug a USB typeC device into this port, does it work? A docking > station is a little bit "different" in that it usually uses the PCIe > connection, not the USB connectors. Or at least that's how my Dell > docking station works last time I tried it[1] > > thanks, > > greg k-h > > [1] When the power supply for the docking station is bigger than the > laptop's power supply, you begin to wonder what is in that thing and > stop using it after a while... Br, -- heikki -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
