Commits
Peter Chen committed 5e53900a6b6
MLK-17312-1 usb: cdns3: gadget: prepare setup packet buffer before receiving it At current setup packet handling flow, the setup packet buffer is only prepared after the controller receives the setup packet, then stores it at its internal buffer, and trigger DESCMIS interrupt (Transfer descriptor missing) to prepare TRB for it. The shortcoming of this design is there is an extra DESCMIS interrupt, and consume more time on enumeration process. As an improvement, we parepare setup buffer beforehand, it is prepared at below situations: - After bus reset has finished. - For non-data stage setup transfers, prepare it before sending ACK for status stage. - For data stage setup transfers, prepare it after data stage but before sending ACK for status stage. Acked-by: Jun Li <jun.li@nxp.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>