On 06/13/2016 12:02 PM, Bjorn Andersson wrote: > Upon opening the tty, uart_open() ends up calling msm_set_baud_rate() > which resets the uart block. If this happens as we're coming out of > msm_console_write() a full fifo worth of console output will be > discarded. > > Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx> > Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> > --- > > As reported here: > https://bugs.96boards.org/show_bug.cgi?id=378 Urgh. As mentioned in commit a12f1b406f2d (tty: serial: msm: Reset uartdm after baud rate change, 2014-10-29) we actually need to reset the hardware sometimes. Perhaps as discussed over IRC we need to take a different approach here and only reset the hardware if the baud actually changes? One way to test this would be to try running a getty on the console and see if input still works. -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
