linux-kernel - Re: [PATCH] arm64: dts: imx8mp: drop dmas property for uart console

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Message-ID: <CAGETcx85z_hkhKFHUwnihqcD0UQG3xtSZjw=BZxqwQB0D1CMgw@mail.gmail.com>
Date:   Thu, 23 Jun 2022 11:25:38 -0700
From:   Saravana Kannan <saravanak@...gle.com>
To:     Fabio Estevam <festevam@...il.com>
Cc:     Sascha Hauer <s.hauer@...gutronix.de>,
        "Peng Fan (OSS)" <peng.fan@....nxp.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>,
        NXP Linux Team <linux-imx@....com>, hvilleneuve@...onoff.com,
        Lucas Stach <l.stach@...gutronix.de>,
        abbaraju.manojsai@...rulasolutions.com,
        Jagan Teki <jagan@...rulasolutions.com>,
        Matteo Lisi <matteo.lisi@...icam.com>,
        Tim Harvey <tharvey@...eworks.com>,
        Teresa Remmet <t.remmet@...tec.de>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, t.remmet@...tec.deh,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH] arm64: dts: imx8mp: drop dmas property for uart console

On Thu, Jun 23, 2022 at 11:20 AM Fabio Estevam <festevam@...il.com> wrote:
>
> On Thu, Jun 23, 2022 at 8:35 AM Fabio Estevam <festevam@...il.com> wrote:
>
> > It didn't work for me on an imx6q-sabresd board. I could not find a v2.
>
> Ok, found your v2 and tested it.
>
> It solves the console problem on an imx6q-sabresd.
>
> > Also, would this solution work when stdout-path is not passed in the devicetree?
>
> I have confirmed that v2 does not fix the case when stdout-path is not
> passed in the devicetree.
>
> While it is a good practice to describe stdout-path in dt, not all
> devicetree files do this,

I don't think it'll be hard to fix the console= case either. In the
case where you are not using stdout-path, how are you setting the
console? Just want to make sure I'm handling that case too.

-Saravana