On Thu, 13 Apr 2023 18:09:14 +0800, Stanley Chang wrote: > Add a new 'snps,parkmode-disable-hs-quirk' DT quirk to dwc3 core for > disable the high-speed parkmode. > > For some USB wifi devices, if enable this feature it will reduce the > performance. Therefore, add an option for disabling HS park mode by > device-tree. > > In Synopsys's dwc3 data book: > In a few high speed devices when an IN request is sent within 900ns of the > ACK of the previous packet, these devices send a NAK. When connected to > these devices, if required, the software can disable the park mode if you > see performance drop in your system. When park mode is disabled, > pipelining of multiple packet is disabled and instead one packet at a time > is requested by the scheduler. This allows up to 12 NAKs in a micro-frame > and improves performance of these slow devices. > > Signed-off-by: Stanley Chang <stanley_chang@xxxxxxxxxxx> > --- > v2 to v3 change: > 1. Add the comment message. > 2. cc the right maintainers. > --- > Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 5 +++++ > 1 file changed, 5 insertions(+) > Acked-by: Rob Herring <robh@xxxxxxxxxx>
