When plugging Logitech C920 webcam, warning messages filled up dmesg:
[77117.655018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[77117.659018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[77122.622952] handle_tx_event: 541 callbacks suppressed
No more warning messages with XHCI_TRUST_TX_LENGTH applied.
BugLink: https://bugs.launchpad.net/bugs/1710548
Signed-off-by: Kai-Heng Feng <[email protected]>
---
drivers/usb/host/xhci-pci.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 8071c8fdd15e..8566b43e19ba 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -202,8 +202,10 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
xhci->quirks |= XHCI_BROKEN_STREAMS;
}
if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
- pdev->device == 0x0015)
+ pdev->device == 0x0015) {
xhci->quirks |= XHCI_RESET_ON_RESUME;
+ xhci->quirks |= XHCI_TRUST_TX_LENGTH;
+ }
if (pdev->vendor == PCI_VENDOR_ID_VIA)
xhci->quirks |= XHCI_RESET_ON_RESUME;
--
2.14.1
hi,
Kai-Heng Feng <[email protected]> writes:
> When plugging Logitech C920 webcam, warning messages filled up dmesg:
> [77117.655018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
> [77117.659018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
have you confirmed this is needed for this controller? Anybody from
Renesas has confirmed it? Do you have an errata document to refer to?
> [77122.622952] handle_tx_event: 541 callbacks suppressed
>
> No more warning messages with XHCI_TRUST_TX_LENGTH applied.
>
> BugLink: https://bugs.launchpad.net/bugs/1710548
> Signed-off-by: Kai-Heng Feng <[email protected]>
> ---
> drivers/usb/host/xhci-pci.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> index 8071c8fdd15e..8566b43e19ba 100644
> --- a/drivers/usb/host/xhci-pci.c
> +++ b/drivers/usb/host/xhci-pci.c
> @@ -202,8 +202,10 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
> xhci->quirks |= XHCI_BROKEN_STREAMS;
> }
> if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
> - pdev->device == 0x0015)
> + pdev->device == 0x0015) {
unnecessary
> xhci->quirks |= XHCI_RESET_ON_RESUME;
> + xhci->quirks |= XHCI_TRUST_TX_LENGTH;
xhci->quirks |= XHCI_RESET_ON_RESUME |
XHCI_TRUST_TX_LENGTH;
> + }
unnecessary
--
balbi
Hi,
On Fri, Aug 18, 2017 at 3:22 PM, Felipe Balbi
<[email protected]> wrote:
>
> hi,
>
> Kai-Heng Feng <[email protected]> writes:
>> When plugging Logitech C920 webcam, warning messages filled up dmesg:
>> [77117.655018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
>> [77117.659018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
>
> have you confirmed this is needed for this controller?
I just found commit d2f48f05cd2a2 ("usb: xhci: ASMedia ASM1042A
chipset need shorts TX quirk") and did the same thing for this
controller.
> Anybody from Renesas has confirmed it?
No, it's a user reported problem, please check the bug report in the link.
> Do you have an errata document to refer to?
No. Probably need Renesas guy to provide it.
>
>> [77122.622952] handle_tx_event: 541 callbacks suppressed
>>
>> No more warning messages with XHCI_TRUST_TX_LENGTH applied.
>>
>> BugLink: https://bugs.launchpad.net/bugs/1710548
>> Signed-off-by: Kai-Heng Feng <[email protected]>
>> ---
>> drivers/usb/host/xhci-pci.c | 4 +++-
>> 1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
>> index 8071c8fdd15e..8566b43e19ba 100644
>> --- a/drivers/usb/host/xhci-pci.c
>> +++ b/drivers/usb/host/xhci-pci.c
>> @@ -202,8 +202,10 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
>> xhci->quirks |= XHCI_BROKEN_STREAMS;
>> }
>> if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
>> - pdev->device == 0x0015)
>> + pdev->device == 0x0015) {
>
> unnecessary
>
>> xhci->quirks |= XHCI_RESET_ON_RESUME;
>> + xhci->quirks |= XHCI_TRUST_TX_LENGTH;
>
> xhci->quirks |= XHCI_RESET_ON_RESUME |
> XHCI_TRUST_TX_LENGTH;
>
>> + }
>
> unnecessary
Do you mean that this quirk just hide the warning, it doesn't fix the
root cause?
>
> --
> balbi
Hi,
Kai-Heng Feng <[email protected]> writes:
>>> When plugging Logitech C920 webcam, warning messages filled up dmesg:
>>> [77117.655018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
>>> [77117.659018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
>>
>> have you confirmed this is needed for this controller?
> I just found commit d2f48f05cd2a2 ("usb: xhci: ASMedia ASM1042A
> chipset need shorts TX quirk") and did the same thing for this
> controller.
>
>> Anybody from Renesas has confirmed it?
> No, it's a user reported problem, please check the bug report in the link.
>
>> Do you have an errata document to refer to?
> No. Probably need Renesas guy to provide it.
or confirm it. Yoshihiro, do you know if this is needed?
>>> [77122.622952] handle_tx_event: 541 callbacks suppressed
>>>
>>> No more warning messages with XHCI_TRUST_TX_LENGTH applied.
>>>
>>> BugLink: https://bugs.launchpad.net/bugs/1710548
>>> Signed-off-by: Kai-Heng Feng <[email protected]>
>>> ---
>>> drivers/usb/host/xhci-pci.c | 4 +++-
>>> 1 file changed, 3 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
>>> index 8071c8fdd15e..8566b43e19ba 100644
>>> --- a/drivers/usb/host/xhci-pci.c
>>> +++ b/drivers/usb/host/xhci-pci.c
>>> @@ -202,8 +202,10 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
>>> xhci->quirks |= XHCI_BROKEN_STREAMS;
>>> }
>>> if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
>>> - pdev->device == 0x0015)
>>> + pdev->device == 0x0015) {
>>
>> unnecessary
>>
>>> xhci->quirks |= XHCI_RESET_ON_RESUME;
>>> + xhci->quirks |= XHCI_TRUST_TX_LENGTH;
>>
>> xhci->quirks |= XHCI_RESET_ON_RESUME |
>> XHCI_TRUST_TX_LENGTH;
>>
>>> + }
>>
>> unnecessary
>
> Do you mean that this quirk just hide the warning, it doesn't fix the
> root cause?
no, I meant that you need to add {} if you make a single statement out
of the quirks.
--
balbi
Hi,
Sorry, I missed this email...
> -----Original Message-----
> From: Felipe Balbi
> Sent: Friday, August 18, 2017 10:10 AM
>
> Hi,
>
> Kai-Heng Feng <[email protected]> writes:
> >>> When plugging Logitech C920 webcam, warning messages filled up dmesg:
> >>> [77117.655018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
> >>> [77117.659018] xhci_hcd 0000:0c:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
> >>
> >> have you confirmed this is needed for this controller?
> > I just found commit d2f48f05cd2a2 ("usb: xhci: ASMedia ASM1042A
> > chipset need shorts TX quirk") and did the same thing for this
> > controller.
> >
> >> Anybody from Renesas has confirmed it?
> > No, it's a user reported problem, please check the bug report in the link.
> >
> >> Do you have an errata document to refer to?
> > No. Probably need Renesas guy to provide it.
>
> or confirm it. Yoshihiro, do you know if this is needed?
I know. This behavior is the same as R-Car H3. But, I didn't find any errata
documents. So, I'm asking HW guys why this environment causes it. However,
I don't get any feedback yet. I think we need any reason for applying such a quirk.
Best regards,
Yoshihiro Shimoda
> >>> [77122.622952] handle_tx_event: 541 callbacks suppressed
> >>>
> >>> No more warning messages with XHCI_TRUST_TX_LENGTH applied.
> >>>
> >>> BugLink: https://bugs.launchpad.net/bugs/1710548
> >>> Signed-off-by: Kai-Heng Feng <[email protected]>
> >>> ---
> >>> drivers/usb/host/xhci-pci.c | 4 +++-
> >>> 1 file changed, 3 insertions(+), 1 deletion(-)
> >>>
> >>> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> >>> index 8071c8fdd15e..8566b43e19ba 100644
> >>> --- a/drivers/usb/host/xhci-pci.c
> >>> +++ b/drivers/usb/host/xhci-pci.c
> >>> @@ -202,8 +202,10 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
> >>> xhci->quirks |= XHCI_BROKEN_STREAMS;
> >>> }
> >>> if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
> >>> - pdev->device == 0x0015)
> >>> + pdev->device == 0x0015) {
> >>
> >> unnecessary
> >>
> >>> xhci->quirks |= XHCI_RESET_ON_RESUME;
> >>> + xhci->quirks |= XHCI_TRUST_TX_LENGTH;
> >>
> >> xhci->quirks |= XHCI_RESET_ON_RESUME |
> >> XHCI_TRUST_TX_LENGTH;
> >>
> >>> + }
> >>
> >> unnecessary
> >
> > Do you mean that this quirk just hide the warning, it doesn't fix the
> > root cause?
>
> no, I meant that you need to add {} if you make a single statement out
> of the quirks.
>
> --
> balbi