> On Sep 29, 2020, at 05:42, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> wrote: > > On 28.9.2020 12.10, Kai-Heng Feng wrote: >> >> >>> On Jun 8, 2020, at 11:56, Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> wrote: >>> >>> >>> >>>> On May 5, 2020, at 01:16, Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> wrote: >>>> >>>> Etron EJ168 USB 3.0 Host Controller stops working after S3, if it was >>>> runtime suspended previously: >>>> [ 370.080359] pci 0000:02:00.0: can't change power state from D3cold to D0 (config space inaccessible) >>>> [ 370.080477] xhci_hcd 0000:04:00.0: can't change power state from D3cold to D0 (config space inaccessible) >>>> [ 370.080532] pcieport 0000:00:1c.0: DPC: containment event, status:0x1f05 source:0x0200 >>>> [ 370.080533] pcieport 0000:00:1c.0: DPC: ERR_FATAL detected >>>> [ 370.080536] xhci_hcd 0000:04:00.0: can't change power state from D3hot to D0 (config space inaccessible) >>>> [ 370.080552] xhci_hcd 0000:04:00.0: AER: can't recover (no error_detected callback) >>>> [ 370.080566] usb usb3: root hub lost power or was reset >>>> [ 370.080566] usb usb4: root hub lost power or was reset >>>> [ 370.080572] xhci_hcd 0000:04:00.0: Host halt failed, -19 >>>> [ 370.080574] xhci_hcd 0000:04:00.0: Host not accessible, reset failed. >>>> [ 370.080575] xhci_hcd 0000:04:00.0: PCI post-resume error -19! >>>> [ 370.080586] xhci_hcd 0000:04:00.0: HC died; cleaning up >>>> >>>> This can be fixed by not runtime suspend the controller at all. >>>> >>>> So disable runtime suspend for EJ168 xHCI device. >>>> >>>> Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> >>> >>> A gentle ping... >> >> Another gentle ping... > > Thanks, somehow I didn't notice this earlier. > > Was the rootcause ever investigated? > Preventing runtime suspend looks like a quick fix to get rid of the issue, but > possibly just hides some other underlying power management problem I tried different angles but didn't find any useful solution. Eventually I found out that the device stays at D0 under Windows, so this is the approach I take. Kai-Heng > > -Mathias
