This commit adds the documentation for consolidate-trbs, and snps,consolidate-trbs property. These when set enables the quirk for XHCI driver for consolidation of TRB's when small buffer sizes are scattered over the TRB cache not making up to MPS or total transfer size with Synopsys xHC. Signed-off-by: Tejas Joglekar <joglekar@xxxxxxxxxxxx> --- Documentation/devicetree/bindings/usb/dwc3.txt | 6 ++++++ Documentation/devicetree/bindings/usb/usb-xhci.txt | 1 + 2 files changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt index 66780a47ad85..9851da41a442 100644 --- a/Documentation/devicetree/bindings/usb/dwc3.txt +++ b/Documentation/devicetree/bindings/usb/dwc3.txt @@ -101,6 +101,12 @@ Optional properties: this and tx-thr-num-pkt-prd to a valid, non-zero value 1-16 (DWC_usb31 programming guide section 1.2.3) to enable periodic ESS TX threshold. + - snps,consolidate-trbs: enable TRBs consolidation - host mode only. Set this + to valid then for Synopsys xHC the TRBs would be + consolidated to at least MPS in order to prevent the + controller getting hang due to small buffer sizes which + does not make up to MPS size or total transfer size + across TRB cache. - <DEPRECATED> tx-fifo-resize: determines if the FIFO *has* to be reallocated. - snps,incr-burst-type-adjustment: Value for INCR burst type of GSBUSCFG0 diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.txt b/Documentation/devicetree/bindings/usb/usb-xhci.txt index 3f378951d624..be8d5e6a6333 100644 --- a/Documentation/devicetree/bindings/usb/usb-xhci.txt +++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt @@ -43,6 +43,7 @@ Optional properties: - quirk-broken-port-ped: set if the controller has broken port disable mechanism - imod-interval-ns: default interrupt moderation interval is 5000ns - phys : see usb-hcd.yaml in the current directory + - consolidate-trbs: indicate if you need to consolidate trbs additionally the properties from usb-hcd.yaml (in the current directory) are supported. -- 2.11.0
