On 13/12/2023 07:35, Chunfeng Yun wrote: > For Gen1 isoc-in endpoint on controller before about SSUSB IPM v1.6.0, it > still send out unexpected ACK after receiving a short packet in burst > transfer, this will cause an exception on connected device, specially for > a 4k camera. > Add a quirk property "mediatek,rxfifo-depth" to work around this hardware > issue; > The side-effect is that may cause performance drop about 10%, including > bulk transfer. > > Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx> > --- > .../devicetree/bindings/usb/mediatek,mtk-xhci.yaml | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml > index e9644e333d78..b8ed68574ba4 100644 > --- a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml > +++ b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml > @@ -124,6 +124,16 @@ properties: > defined in the xHCI spec on MTK's controller. > default: 5000 > > + mediatek,rxfifo-depth: > + description: The property description and driver patch suggest you configure the depth of FIFO, so this should be not bool, but some uint32. And then, use generic "fifo-depth" property to set desired depth. Best regards, Krzysztof
