On Wed, May 02, 2012 at 03:41:55PM -0400, Alan Stern wrote:
> On Thu, 3 May 2012, Andrey Rahmatullin wrote:
>
> > On Wed, May 02, 2012 at 01:42:08PM -0400, Alan Stern wrote:
> > > Hmmm. What about runtime suspend?
> > >
> > > Still using the new patch without my patch, if you write "auto" to the
> > > power/control file under the two controller sysfs directories, at least
> > > one of them should go into suspend. You can check this by seeing what
> > > the corresponding power/runtime_status file says (there might be
> > > something in the dmesg log too). When this happens, what does "lspci
> > > -v" show for the controller's state?
> > root@sabine:~# echo auto> /sys/bus/pci/devices/0000\:00\:1d.0/power/control
> > root@sabine:~# echo auto> /sys/bus/pci/devices/0000\:00\:1a.0/power/control
> > root@sabine:~# cat /sys/bus/pci/devices/0000\:00\:1d.0/power/runtime_status
> > suspended
> > root@sabine:~# cat /sys/bus/pci/devices/0000\:00\:1a.0/power/runtime_status
> > suspended
> > root@sabine:~# lspci -v
> > 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) (prog-if 20 [EHCI])
> > Subsystem: ASUSTeK Computer Inc. Device 1147
> > Flags: medium devsel, IRQ 16
> > Memory at dfe08000 (32-bit, non-prefetchable) [size=1K]
> > Capabilities: [50] Power Management version 2
> > Capabilities: [58] Debug port: BAR=1 offset=00a0
> > Capabilities: [98] PCI Advanced Features
> > Kernel driver in use: ehci_hcd
> > 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) (prog-if 20 [EHCI])
> > Subsystem: ASUSTeK Computer Inc. Device 1147
> > Flags: medium devsel, IRQ 23
> > Memory at dfe07000 (32-bit, non-prefetchable) [size=1K]
> > Capabilities: [50] Power Management version 2
> > Capabilities: [58] Debug port: BAR=1 offset=00a0
> > Capabilities: [98] PCI Advanced Features
> > Kernel driver in use: ehci_hcd
>
> Argh. You need to use "lspci -vv" to see the details of the Power
> Management capability. I forgot about that.
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) (prog-if 20 [EHCI])
Subsystem: ASUSTeK Computer Inc. Device 1147
Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 16
Region 0: Memory at dfe08000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
AFCap: TP+ FLR+
AFCtrl: FLR-
AFStatus: TP-
Kernel driver in use: ehci_hcd
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) (prog-if 20 [EHCI])
Subsystem: ASUSTeK Computer Inc. Device 1147
Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 23
Region 0: Memory at dfe07000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
AFCap: TP+ FLR+
AFCtrl: FLR-
AFStatus: TP-
Kernel driver in use: ehci_hcd
> After you do this, does the runtime_status change back to "active" when
> you plug in a USB device?
Yes. And it's Status: in lspci changes to D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
--
WBR, wRAR
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