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Date: Tue, 30 Jul 2019 19:09:25 -0700
From: Andrey Smirnov <andrew.smirnov@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-serial@...r.kernel.org, Stefan Agner <stefan@...er.ch>,
Chris Healy <cphealy@...il.com>,
Cory Tusar <cory.tusar@....aero>,
Lucas Stach <l.stach@...gutronix.de>,
Jiri Slaby <jslaby@...e.com>, dl-linux-imx <linux-imx@....com>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 19/24] tty: serial: fsl_lpuart: Introduce lpuart_tx_dma_startup()
On Tue, Jul 30, 2019 at 8:56 AM Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> On Mon, Jul 29, 2019 at 12:52:21PM -0700, Andrey Smirnov wrote:
> > Code configure DMA TX path in lpuart_startup(), lpuart32_startup() and
> > lpuart_resume() is doing exactly the same thing, so move it into a
> > standalone subroutine.
> >
> > Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
> > Cc: Stefan Agner <stefan@...er.ch>
> > Cc: Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>
> > Cc: Chris Healy <cphealy@...il.com>
> > Cc: Cory Tusar <cory.tusar@....aero>
> > Cc: Lucas Stach <l.stach@...gutronix.de>
> > Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > Cc: Jiri Slaby <jslaby@...e.com>
> > Cc: linux-imx@....com
> > Cc: linux-serial@...r.kernel.org
> > Cc: linux-kernel@...r.kernel.org
> > ---
> > drivers/tty/serial/fsl_lpuart.c | 53 ++++++++++++++-------------------
> > 1 file changed, 23 insertions(+), 30 deletions(-)
> >
> > diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
> > index 2ad5750fe511..558acf29cbed 100644
> > --- a/drivers/tty/serial/fsl_lpuart.c
> > +++ b/drivers/tty/serial/fsl_lpuart.c
> > @@ -1434,6 +1434,26 @@ static void rx_dma_timer_init(struct lpuart_port *sport)
> > add_timer(&sport->lpuart_timer);
> > }
> >
> > +static void lpuart_tx_dma_startup(struct lpuart_port *sport)
> > +{
> > + u32 uartbaud;
> > +
> > + if (sport->dma_tx_chan && !lpuart_dma_tx_request(&sport->port)) {
> > + init_waitqueue_head(&sport->dma_wait);
> > + sport->lpuart_dma_tx_use = true;
> > + if (lpuart_is_32(sport)) {
> > + uartbaud = lpuart32_read(&sport->port, UARTBAUD);
> > + lpuart32_write(&sport->port,
> > + uartbaud | UARTBAUD_TDMAE, UARTBAUD);
> > + } else {
> > + writeb(readb(sport->port.membase + UARTCR5) |
> > + UARTCR5_TDMAS, sport->port.membase + UARTCR5);
> > + }
> > + } else {
> > + sport->lpuart_dma_tx_use = false;
> > + }
> > +}
> > +
> > static int lpuart_startup(struct uart_port *port)
> > {
> > struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
> > @@ -1471,14 +1491,7 @@ static int lpuart_startup(struct uart_port *port)
> > sport->lpuart_dma_rx_use = false;
> > }
> >
> > - if (sport->dma_tx_chan && !lpuart_dma_tx_request(port)) {
> > - init_waitqueue_head(&sport->dma_wait);
> > - sport->lpuart_dma_tx_use = true;
> > - temp = readb(port->membase + UARTCR5);
> > - writeb(temp | UARTCR5_TDMAS, port->membase + UARTCR5);
> > - } else {
> > - sport->lpuart_dma_tx_use = false;
> > - }
> > + lpuart_tx_dma_startup(port);
> >
> > spin_unlock_irqrestore(&sport->port.lock, flags);
> >
> > @@ -1522,14 +1535,7 @@ static int lpuart32_startup(struct uart_port *port)
> > sport->lpuart_dma_rx_use = false;
> > }
> >
> > - if (sport->dma_tx_chan && !lpuart_dma_tx_request(port)) {
> > - init_waitqueue_head(&sport->dma_wait);
> > - sport->lpuart_dma_tx_use = true;
> > - temp = lpuart32_read(&sport->port, UARTBAUD);
> > - lpuart32_write(&sport->port, temp | UARTBAUD_TDMAE, UARTBAUD);
> > - } else {
> > - sport->lpuart_dma_tx_use = false;
> > - }
> > + lpuart_tx_dma_startup(port);
> >
> > if (sport->lpuart_dma_rx_use) {
> > /* RXWATER must be 0 */
> > @@ -2581,20 +2587,7 @@ static int lpuart_resume(struct device *dev)
> > }
> > }
> >
> > - if (sport->dma_tx_chan && !lpuart_dma_tx_request(&sport->port)) {
> > - init_waitqueue_head(&sport->dma_wait);
> > - sport->lpuart_dma_tx_use = true;
> > - if (lpuart_is_32(sport)) {
> > - temp = lpuart32_read(&sport->port, UARTBAUD);
> > - lpuart32_write(&sport->port,
> > - temp | UARTBAUD_TDMAE, UARTBAUD);
> > - } else {
> > - writeb(readb(sport->port.membase + UARTCR5) |
> > - UARTCR5_TDMAS, sport->port.membase + UARTCR5);
> > - }
> > - } else {
> > - sport->lpuart_dma_tx_use = false;
> > - }
> > + lpuart_tx_dma_startup(sport);
> >
> > if (lpuart_is_32(sport)) {
> > if (sport->lpuart_dma_rx_use) {
> > --
> > 2.21.0
> >
>
> This patch breaks the build:
>
> drivers/tty/serial/fsl_lpuart.c: In function lpuart_startup:
> drivers/tty/serial/fsl_lpuart.c:1494:24: error: passing argument 1 of lpuart_tx_dma_startup from incompatible pointer type [-Werror=incompatible-pointer-types]
> 1494 | lpuart_tx_dma_startup(port);
> | ^~~~
> | |
> | struct uart_port *
> drivers/tty/serial/fsl_lpuart.c:1438:55: note: expected struct lpuart_port * but argument is of type struct uart_port *
> 1438 | static void lpuart_tx_dma_startup(struct lpuart_port *sport)
> | ~~~~~~~~~~~~~~~~~~~~^~~~~
> drivers/tty/serial/fsl_lpuart.c: In function lpuart32_startup:
> drivers/tty/serial/fsl_lpuart.c:1537:24: error: passing argument 1 of lpuart_tx_dma_startup from incompatible pointer type [-Werror=incompatible-pointer-types]
> 1537 | lpuart_tx_dma_startup(port);
> | ^~~~
> | |
> | struct uart_port *
> drivers/tty/serial/fsl_lpuart.c:1438:55: note: expected struct lpuart_port * but argument is of type struct uart_port *
> 1438 | static void lpuart_tx_dma_startup(struct lpuart_port *sport)
> | ~~~~~~~~~~~~~~~~~~~~^~~~~
> cc1: some warnings being treated as errors
>
>
> So I've stopped applying the series here.
>
> Please fix up and resend the remaining ones.
>
Ugh, my bad, sorry about that. Will do in v2.
Thanks,
Andrey Smirnov
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