This commit adds the documentation for sgl-trb-cache-size-quirk, and snps,sgl-trb-cache-size-quirk property. These when set enables the quirk for XHCI driver for consolidation of sg list into a temporary buffer when small buffer sizes are scattered over the sg list not making up to MPS or total transfer size within TRB cache size with Synopsys xHC. Signed-off-by: Tejas Joglekar <joglekar@xxxxxxxxxxxx> --- Changes in v2: - Renamed the property Documentation/devicetree/bindings/usb/dwc3.txt | 4 ++++ Documentation/devicetree/bindings/usb/usb-xhci.txt | 3 +++ 2 files changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt index 9946ff9ba735..6d0418ee4dbd 100644 --- a/Documentation/devicetree/bindings/usb/dwc3.txt +++ b/Documentation/devicetree/bindings/usb/dwc3.txt @@ -104,6 +104,10 @@ 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,sgl-trb-cache-size-quirk: enable sg list consolidation - host mode + only. Set to use SG buffers of at least MPS size + by consolidating smaller SG buffers list into a + single buffer. - <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..14d900474894 100644 --- a/Documentation/devicetree/bindings/usb/usb-xhci.txt +++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt @@ -43,6 +43,9 @@ 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 + - sgl-trb-cache-size-quirk: set if you need to consolidate sg list into a + temporary buffer when small SG buffer sizes does not make upto MPS + size or total transfer size across the TRB cache size. additionally the properties from usb-hcd.yaml (in the current directory) are supported. -- 2.11.0
