Hi Marge, On Fri, Aug 12, 2022 at 04:43:25PM +0800, margeyang wrote: > From: Marge Yang <marge.yang@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> > > RMI4 F03 supports the Stick function, > it's designed to support relative packet. > This patch supports the following case. > When relative packet can't be reported completely, > it may miss one byte or two byte. > New Synaptics firmware will report PARITY error. > When timeout error or parity error happens, > RMI4 driver will sends 0xFE command and > ask FW to Re-send stick packet again. My understanding is that F03 is intended to be a pass-through mechanism for PS/2-compatible devices. In that spirit all protocol handling and validation should happen in psmouse driver that attaches to a serio port provided by F03. Historically we did not pay attention to parity and frame errors for PS/2 mice/touchpads (and for keyboards on x86) but we coudl add such code there. Do we actually observe this with RMI devices? Can RMI firmware handle this better instead? Thanks. -- Dmitry
