linux-kernel - Re: [PATCH v2] serial: imx: Revert "initialized DMA w/o HW flow enabled"

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Message-ID: <CAOMZO5Cu1AG7xYN+uCKnueiwBzBVDhXmqX3FkF3u03Faju4thw@mail.gmail.com>
Date:	Fri, 8 May 2015 08:30:45 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	jiwang <jiada_wang@...tor.com>, Jiri Slaby <jslaby@...e.cz>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	anton_bondarenko@...tor.com, Dirk Behme <dirk.behme@...bosch.com>,
	Nicolae Rosia <nicolae.rosia@...il.com>,
	Fabio Estevam <fabio.estevam@...escale.com>
Subject: Re: [PATCH v2] serial: imx: Revert "initialized DMA w/o HW flow enabled"

On Fri, May 8, 2015 at 4:13 AM, Sebastian Andrzej Siewior
<sebastian@...akpoint.cc> wrote:

> +
> +                       /*
> +                        * Can we enable the DMA support? Be aware that
> +                        * at least IMX6 needs to load external SDMA firmware in
> +                        * order work properly. The in-ROM firmware is not
> +                        * wokring properly.
> +                        */

On my tests:

Prior to this patch: with the internal ROM SDMA firmware I got UART
issues when communicating through a Bluetooth module. With external
SDMA firmware (version 3.1) it worked fine.

With your patch applied: Bluetooth worked fine even with no external
SDMA firmware, which does not match the comments you added.

Can't you just remove these comments?

Thanks
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