@@ -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
@@ -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.
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@synopsys.com> --- 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(+)