linux-kernel - Re: [PATCH] ARM: dts: imx6qdl-wandboard: add scl/sda gpios definitions for i2c bus recovery

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Date:   Sun, 31 Jan 2021 22:15:46 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Dima Azarkin <azdmg@...look.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        "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>,
        Christian Hewitt <christianshewitt@...il.com>
Subject: Re: [PATCH] ARM: dts: imx6qdl-wandboard: add scl/sda gpios
 definitions for i2c bus recovery

On Sun, Jan 31, 2021 at 12:55 PM Dima Azarkin <azdmg@...look.com> wrote:
>
> The i2c bus on imx6qdl-wandboard has intermittent issues where SDA can freeze
> on low level at the end of transaction so the bus can no longer work. This
> impacts reading of EDID data leading to incorrect TV resolution and no audio.
>
> This scenario is improved by adding scl/sda gpios definitions to implement the
> i2c bus recovery mechanism.
>
> Signed-off-by: Dima Azarkin <azdmg@...look.com>

Reviewed-by: Fabio Estevam <festevam@...il.com>