---
> > > > > From: Uwe Kleine-König
> > > > > Sent: 2018年9月20日 15:55
> > > > > To: Robin Gong
> > > > > Cc: jsl...@suse.com; Andy Duan ;
> > > > > linux-ser...@vger.kernel.org; linux-kernel@vger.kernel.org; dl-
> &g
Sent: 2018年9月20日 15:55
> > > > To: Robin Gong
> > > > Cc: jsl...@suse.com; Andy Duan ;
> > > > linux-ser...@vger.kernel.org; linux-kernel@vger.kernel.org; dl-
> > > > linux-imx ; ker...@pengutronix.de
> > > > Subject: Re: [PATCH v1] tty: seria
; Andy Duan ;
> > > linux-ser...@vger.kernel.org; linux-kernel@vger.kernel.org; dl-
> > > linux-imx ; ker...@pengutronix.de
> > > Subject: Re: [PATCH v1] tty: serial: imx: enable IDDMAEN for the
> > > last tail data
> > >
> > > Hello,
> > &g
nel.org; dl-
> > linux-imx
> > ; ker...@pengutronix.de
> > Subject: Re: [PATCH v1] tty: serial: imx: enable IDDMAEN for the
> > last tail data
> >
> > Hello,
> >
> > On Thu, Sep 20, 2018 at 11:26:00PM +0800, Robin Gong wrote:
> > > enabl
> -Original Message-
> From: Uwe Kleine-König
> Sent: 2018年9月20日 15:55
> To: Robin Gong
> Cc: jsl...@suse.com; Andy Duan ;
> linux-ser...@vger.kernel.org; linux-kernel@vger.kernel.org; dl-linux-imx
> ; ker...@pengutronix.de
> Subject: Re: [PATCH v1] tty: serial:
Hello,
On Thu, Sep 20, 2018 at 11:26:00PM +0800, Robin Gong wrote:
> enable IDDMAEN in UCR4 to let sdma script has the chance to detect
> the idle status and transfer the last tail data with the interrupt
> notifying uart driver.Otherwise, the last dma done interrupt of the
> tail data in rxfifo w
enable IDDMAEN in UCR4 to let sdma script has the chance to detect
the idle status and transfer the last tail data with the interrupt
notifying uart driver.Otherwise, the last dma done interrupt of the
tail data in rxfifo whose size is less than watermark may never be
received by uart driver.
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