Both Pericom OHCI and EHCI devices support PME# from all power states: 06:00.0 USB controller [0c03]: Pericom Semiconductor PI7C9X442SL USB OHCI Controller [12d8:400e] (rev 01) (prog-if 10 [OHCI]) Subsystem: Pericom Semiconductor PI7C9X442SL USB OHCI Controller [12d8:400e] Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin A routed to IRQ 17 Region 0: Memory at a5502000 (32-bit, non-prefetchable) [size=4K] Capabilities: [80] Power Management version 3 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+) Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME- 06:00.2 USB controller [0c03]: Pericom Semiconductor PI7C9X442SL USB EHCI Controller [12d8:400f] (rev 01) (prog-if 20 [EHCI]) Subsystem: Pericom Semiconductor PI7C9X442SL USB EHCI Controller [12d8:400f] Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin C routed to IRQ 19 Region 0: Memory at a5500000 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 3 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+) Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME- Though my original approach [1] appears to work, further testing shows that there is a 20% chance PME# won't be asserted when USB device is plugged. So remove the PME support for both devices to make USB plugging works. [1] https://lore.kernel.org/lkml/20191227092405.29588-1-kai.heng.feng@xxxxxxxxxxxxx/ Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=205981 Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> --- drivers/pci/quirks.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index ca9ed5774eb1..db2590243f0d 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5568,6 +5568,18 @@ static void pci_fixup_no_d0_pme(struct pci_dev *dev) } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASMEDIA, 0x2142, pci_fixup_no_d0_pme); +/* + * Device [12d8:0x400e] and [12d8:0x400f] + * PME# doesn't always get asserted on all power states claim to support PME# + */ +static void pci_fixup_no_pme(struct pci_dev *dev) +{ + pci_info(dev, "PME# isn't reliable, disabling it\n"); + dev->pme_support = 0; +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_PERICOM, 0x400e, pci_fixup_no_pme); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_PERICOM, 0x400f, pci_fixup_no_pme); + static void apex_pci_fixup_class(struct pci_dev *pdev) { pdev->class = (PCI_CLASS_SYSTEM_OTHER << 8) | pdev->class; -- 2.17.1
