linux-kernel - Re: [PATCH] arm64: dts: imx8mm: fix dma peripheral type for SAI nodes

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Date:   Wed, 15 Apr 2020 14:45:48 -0400
From:   Matt Porter <mporter@...sulko.com>
To:     Daniel Baluta <daniel.baluta@...il.com>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Anson Huang <Anson.Huang@....com>,
        Leonard Crestez <leonard.crestez@....com>,
        Daniel Baluta <daniel.baluta@....com>,
        Devicetree List <devicetree@...r.kernel.org>,
        Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        yibin.gong@....com
Subject: Re: [PATCH] arm64: dts: imx8mm: fix dma peripheral type for SAI nodes

On Wed, Apr 15, 2020 at 09:04:43PM +0300, Daniel Baluta wrote:
> On Tue, Mar 31, 2020 at 11:36 PM Matt Porter <mporter@...sulko.com> wrote:
> >
> > The peripheral type specified in the dma phandle for each SAI node
> > is incorrect. Change it to specify the SAI peripheral.
> >
> > Signed-off-by: Matt Porter <mporter@...sulko.com>
> 
> Hi Matt,
> 
> Why do you think this is incorrect?  AFAIK script number 2 works fine
> for SAI. Can you add
> more details on what bug are you encountering?
> 
> Adding Robin the owner of SDMA.

Hi Daniel,

Thanks for the response. I was experiencing timeouts that were traced
back to dma incompletions. Changing the script at the time fixed that
issue. Now, given your response I went back and checked this again and
verified that script 2 does work for me now. I did change firmware to
the latest v4.4 from something quite old so now I'm suspecting I had
bad firmware loaded up. Does that sound plausible? In any case, I can
confirm this is not needed.

-Matt