On 8/4/2017 4:44 PM, Felipe Balbi wrote: > > Hi, > > Sandeep Singh <Sandeep.Singh@xxxxxxx> writes: >> From: Sandeep Singh <sandeep.singh@xxxxxxx> >> >> Certain HP keyboards would keep inputting a character automatically which >> is the wake-up key after S3 resume >> >> On some AMD platforms USB host fails to respond (by holding resume-K) to >> USB device (an HP keyboard) resume request within 1ms (TURSM) and ensures >> that resume is signaled for at least 20 ms (TDRSMDN), which is defined in >> USB 2.0 spec. The result is that the keyboard is out of function. >> >> In SNPS USB design, the host responds to the resume request only after >> system gets back to S0 and the host gets to functional after the internal >> HW restore operation that is more than 1 second after the initial resume >> request from the USB device. >> >> As a workaround for specific keyboard ID(HP Keyboards), applying port reset >> after resume when the keyboard is plugged in. >> >> Signed-off-by: Sandeep Singh <Sandeep.Singh@xxxxxxx> >> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx> >> cc: Nehal Shah <Nehal-bakulchandra.Shah@xxxxxxx> > > seems correct now: > > Reviewed-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> > Greg, Any feedback on this patch.? -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
