linux-kernel - Re: [PATCH v9 00/11] serial: 8250: split LPSS to 8250

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Message-ID: <CAHp75VfvBoPX3W8TOZZgsJJE1sV=NwiAUXO9xpsf_H-r7KiOvg@mail.gmail.com>
Date:	Wed, 3 Aug 2016 19:14:39 +0300
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	"Bryan O'Donoghue" <pure.logic@...us-software.ie>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Peter Hurley <peter@...leysoftware.com>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	Vinod Koul <vinod.koul@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	dmaengine <dmaengine@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Puustinen, Ismo" <ismo.puustinen@...el.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Subject: Re: [PATCH v9 00/11] serial: 8250: split LPSS to 8250_lpss, enable
 DMA on Quark

On Tue, Jun 21, 2016 at 6:10 PM, Bryan O'Donoghue
<pure.logic@...us-software.ie> wrote:
> On Mon, 2016-06-20 at 12:17 +0300, Andy Shevchenko wrote:

>> Bryan, since this series doesn't include any DMA management quirks I
>> didn't
>> address it. It is a matter of the following series which I would send
>> later.
>
> OK I'm not 100% happy with that but I trust you to do it.

I investigated the issue with DMA you pointed me to. Seems Quark UART
/ DMA requires not only handshake interface IDs, but also Channel #
can't be arbitrary. So, I attach the one patch here to try. I will fix
the series to follow the observing.


-- 
With Best Regards,
Andy Shevchenko

Download attachment "0001-TBD-serial-8250_dma-acquire-both-DMA-channels.patch" of type "application/octet-stream" (2593 bytes)