On Sat, Aug 08, 2015 at 10:03:43AM +0100, Russell King - ARM Linux wrote:
> On Fri, Aug 07, 2015 at 08:28:57PM -0400, Peter Hurley wrote:
> > Even dma_get_slave_caps() returns _true_ for cmd_pause support; ok, that
> > interface is pointless.
>
> How about reporting that as a bug then, because if
On Mon, Aug 10, 2015 at 09:00:29AM -0400, Peter Hurley wrote:
> Russell seemed to think that the current dma operation was necessary
> information to
> differentiate types of pause support, but I don't think that's required.
> As Sebastian's omap-dma driver patch shows, partial pause support has m
On 08/10/2015 07:54 AM, Peter Ujfalusi wrote:
> On 08/07/2015 11:00 PM, Sebastian Andrzej Siewior wrote:
> I don't think this is good thing for the stable _and_ for the mainline at the
> same time:
> in stable the rx DMA should not be allowed since the stable kernels does not
> allow pause/resume
On 08/10/2015 01:54 PM, Peter Ujfalusi wrote:
>> diff --git a/drivers/tty/serial/8250/8250_omap.c
>> b/drivers/tty/serial/8250/8250_omap.c
>> index 0340ee6ba970..07a11e0935e4 100644
>> --- a/drivers/tty/serial/8250/8250_omap.c
>> @@ -769,7 +771,9 @@ static void omap_8250_rx_dma_flush(struct uart_8
On 08/07/2015 11:00 PM, Sebastian Andrzej Siewior wrote:
> The 8250-omap driver requires the DMA-engine driver to support the pause
> command in order to properly turn off programmed RX transfer before the
> driver stars manually reading from the FIFO.
> The lacking support of the requirement has b
On Sat, Aug 08, 2015 at 11:32:05AM +0200, Sebastian Andrzej Siewior wrote:
> On 08/08/2015 02:28 AM, Peter Hurley wrote:
> >> diff --git a/drivers/tty/serial/8250/8250_omap.c
> >> b/drivers/tty/serial/8250/8250_omap.c
> >> index 0340ee6ba970..07a11e0935e4 100644
> >> --- a/drivers/tty/serial/8250/
On Sat, Aug 08, 2015 at 11:32:05AM +0200, Sebastian Andrzej Siewior wrote:
> This might not happen at all. At 115200 I *never* encouraged this. Once
> the FIFO is filled with less than RX-trigger size than the UART sends
> the time-out interrupt and the DMA *never* completes.
Careful with statemen
On 08/08/2015 02:28 AM, Peter Hurley wrote:
>> diff --git a/drivers/tty/serial/8250/8250_omap.c
>> b/drivers/tty/serial/8250/8250_omap.c
>> index 0340ee6ba970..07a11e0935e4 100644
>> --- a/drivers/tty/serial/8250/8250_omap.c
>> +++ b/drivers/tty/serial/8250/8250_omap.c
>> @@ -769,7 +771,9 @@ stati
On Fri, Aug 07, 2015 at 08:28:57PM -0400, Peter Hurley wrote:
> Even dma_get_slave_caps() returns _true_ for cmd_pause support; ok, that
> interface is pointless.
How about reporting that as a bug then, because if you look back in the
git history, as you are fully capable of, you will find that th
On 08/07/2015 04:00 PM, Sebastian Andrzej Siewior wrote:
> The 8250-omap driver requires the DMA-engine driver to support the pause
> command in order to properly turn off programmed RX transfer before the
> driver stars manually reading from the FIFO.
> The lacking support of the requirement has b
The 8250-omap driver requires the DMA-engine driver to support the pause
command in order to properly turn off programmed RX transfer before the
driver stars manually reading from the FIFO.
The lacking support of the requirement has been discovered recently. In
order to stay safe here we disable su
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