Re: [PATCH v2 2/2] serial: mxs-auart: fix tx

[Stefan Wahren]

Am 01.02.24 um 13:05 schrieb Jiri Slaby:
> On 01. 02. 24, 11:55, Jiri Slaby (SUSE) wrote:
> > Emil reports:
> >    After updating Linux on an i.MX28 board, serial communication over
> >    AUART broke. When I TX from the board and measure on the TX pin, it
> >    seems like the HW fifo is not emptied before the transmission is
> >    stopped.
> >
> > MXS performs weird things with stop_tx(). The driver makes it
> > conditional on uart_tx_stopped().
> >
> > So the driver needs special handling. Pass the brand new UART_TX_NOSTOP
> > to uart_port_tx_flags() and handle the stop on its own.
> >
> > Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
> > Reported-by: Emil Kronborg <emil.kronborg@xxxxxxxxxxxxxx>
> > Fixes: 2d141e683e9a ("tty: serial: use uart_port_tx() helper")
> > Closes:
> > https://lore.kernel.org/all/miwgbnvy3hjpnricubg76ytpn7xoceehwahupy25bubbduu23s@om2lptpa26xw/
Tested-by: Stefan Wahren <wahrenst@xxxxxxx>

Thanks