| Message ID | 1611895604-4496-6-git-send-email-wcheng@codeaurora.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Re-introduce TX FIFO resize for larger EP bursting | expand |
On Thu, 28 Jan 2021 20:46:44 -0800, Wesley Cheng wrote: > Update the tx-fifo-resize property with a better description, while > adding the tx-fifo-max-num, which is a new parameter allowing > adjustments for the maximum number of packets the txfifo resizing logic > can account for while resizing the endpoints. > > Signed-off-by: Wesley Cheng <wcheng@codeaurora.org> > --- > Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 15 +++++++++++++-- > 1 file changed, 13 insertions(+), 2 deletions(-) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml index 2247da7..652b246 100644 --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml @@ -283,10 +283,21 @@ properties: maximum: 16 tx-fifo-resize: - description: Determines if the FIFO *has* to be reallocated - deprecated: true + description: Determines if the TX fifos can be dynamically resized depending + on the number of IN endpoints used and if bursting is supported. This + may help improve bandwidth on platforms with higher system latencies, as + increased fifo space allows for the controller to prefetch data into its + internal memory. type: boolean + tx-fifo-max-num: + description: Specifies the max number of packets the txfifo resizing logic + can account for when higher endpoint bursting is used. (bMaxBurst > 6) The + higher the number, the more fifo space the txfifo resizing logic will + allocate for that endpoint. + $ref: /schemas/types.yaml#/definitions/uint8 + minimum: 3 + snps,incr-burst-type-adjustment: description: Value for INCR burst type of GSBUSCFG0 register, undefined length INCR
Update the tx-fifo-resize property with a better description, while adding the tx-fifo-max-num, which is a new parameter allowing adjustments for the maximum number of packets the txfifo resizing logic can account for while resizing the endpoints. Signed-off-by: Wesley Cheng <wcheng@codeaurora.org> --- Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)