[PATCH 14/15] usb: dwc3: Add disabling of start_transfer failure quirk
In DWC_usb31 version 1.70a-ea06 and prior needs a SW workaround for isoc START TRANSFER command failure. However, some affected versions may have RTL patches to fix this without a SW workaround. Add this quirk to disable the SW workaround when it is not needed. Synopsys STAR 9001202023: Wrong microframe number for isochronous IN endpoints. Cc: John Youn Signed-off-by: Thinh Nguyen --- Documentation/devicetree/bindings/usb/dwc3.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt index 02dde83d02fa..c03a3b363cde 100644 --- a/Documentation/devicetree/bindings/usb/dwc3.txt +++ b/Documentation/devicetree/bindings/usb/dwc3.txt @@ -15,6 +15,9 @@ Optional properties: - phys: from the *Generic PHY* bindings - phy-names: from the *Generic PHY* bindings; supported names are "usb2-phy" or "usb3-phy". + - snps,dis_start_transfer_quirk: when set, disable isoc START TRANSFER command + failure SW work-around for DWC_usb31 version 1.70a-ea06 + and prior. - snps,usb3_lpm_capable: determines if platform is USB3 LPM capable - snps,disable_scramble_quirk: true when SW should disable data scrambling. Only really useful for FPGA builds. -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 14/15] usb: dwc3: Add disabling of start_transfer failure quirk
On Fri, Jan 05, 2018 at 12:16:02PM -0800, Thinh Nguyen wrote: > In DWC_usb31 version 1.70a-ea06 and prior needs a SW workaround for isoc > START TRANSFER command failure. However, some affected versions may have > RTL patches to fix this without a SW workaround. Add this quirk to > disable the SW workaround when it is not needed. I really think this one should be implied by compatible strings. > Synopsys STAR 9001202023: Wrong microframe number for isochronous IN > endpoints. > > Cc: John Youn > Signed-off-by: Thinh Nguyen > --- > Documentation/devicetree/bindings/usb/dwc3.txt | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt > b/Documentation/devicetree/bindings/usb/dwc3.txt > index 02dde83d02fa..c03a3b363cde 100644 > --- a/Documentation/devicetree/bindings/usb/dwc3.txt > +++ b/Documentation/devicetree/bindings/usb/dwc3.txt > @@ -15,6 +15,9 @@ Optional properties: > - phys: from the *Generic PHY* bindings > - phy-names: from the *Generic PHY* bindings; supported names are "usb2-phy" > or "usb3-phy". > + - snps,dis_start_transfer_quirk: when set, disable isoc START TRANSFER > command > + failure SW work-around for DWC_usb31 version 1.70a-ea06 > + and prior. > - snps,usb3_lpm_capable: determines if platform is USB3 LPM capable > - snps,disable_scramble_quirk: true when SW should disable data scrambling. > Only really useful for FPGA builds. > -- > 2.11.0 > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 14/15] usb: dwc3: Add disabling of start_transfer failure quirk
Hi, Rob Herring writes: > On Fri, Jan 05, 2018 at 12:16:02PM -0800, Thinh Nguyen wrote: >> In DWC_usb31 version 1.70a-ea06 and prior needs a SW workaround for isoc >> START TRANSFER command failure. However, some affected versions may have >> RTL patches to fix this without a SW workaround. Add this quirk to >> disable the SW workaround when it is not needed. > > I really think this one should be implied by compatible strings. won't work for dwc3. Core driver has a single compatible string, also this wouldn't work for PCI-based implementations. -- balbi signature.asc Description: PGP signature
Re: [PATCH 14/15] usb: dwc3: Add disabling of start_transfer failure quirk
On Tue, Jan 9, 2018 at 2:45 AM, Felipe Balbi wrote: > > Hi, > > Rob Herring writes: >> On Fri, Jan 05, 2018 at 12:16:02PM -0800, Thinh Nguyen wrote: >>> In DWC_usb31 version 1.70a-ea06 and prior needs a SW workaround for isoc >>> START TRANSFER command failure. However, some affected versions may have >>> RTL patches to fix this without a SW workaround. Add this quirk to >>> disable the SW workaround when it is not needed. >> >> I really think this one should be implied by compatible strings. > > won't work for dwc3. Core driver has a single compatible string, also > this wouldn't work for PCI-based implementations. Then you will have to look at the parent node (this is why the way DWC3 was split is wrong) or make the compatible strings more specific. That is the purpose of compatible strings. For PCI, don't you have different VID/PIDs? If not how would quirks work for non-DT systems. Rob -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
