Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH v4 8/8] [DNI] arm64: dts: renesas: eagle: Specify channel
 amplitude
To:     Jacopo Mondi <jacopo+renesas@jmondi.org>,
        kieran.bingham+renesas@ideasonboard.com,
        laurent.pinchart+renesas@ideasonboard.com,
        niklas.soderlund+renesas@ragnatech.se, geert@linux-m68k.org
Cc:     linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
        linux-kernel@vger.kernel.org, Hyun Kwon <hyunk@xilinx.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
References: <20201112162729.101384-1-jacopo+renesas@jmondi.org>
 <20201112162729.101384-9-jacopo+renesas@jmondi.org>
From:   Sergei Shtylyov <sergei.shtylyov@gmail.com>
Message-ID: <3a659060-8e73-0d58-0415-7f567556f966@gmail.com>
Date:   Thu, 12 Nov 2020 23:52:20 +0300
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
 Thunderbird/78.4.0
MIME-Version: 1.0
In-Reply-To: <20201112162729.101384-9-jacopo+renesas@jmondi.org>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 11/12/20 7:27 PM, Jacopo Mondi wrote:

> Use the newly introduced 'maxim,maxim,initial-reverse-channel-mV'

   "maxim," repeated twice.

> property to specify the initial reverse channel amplitude when the
> remote serializers are not pre-programmed with noise immunity threshold
> enabled.
> 
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> ---
>  arch/arm64/boot/dts/renesas/r8a77970-eagle.dts | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> index 45b947d44cee..75296865104c 100644
> --- a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> +++ b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> @@ -308,6 +308,7 @@ gmsl: gmsl-deserializer@48 {
>  
>  		/* eagle-pca9654-max9286-pwdn */
>  		enable-gpios = <&io_expander 0 GPIO_ACTIVE_HIGH>;
> +		maxim,initial-reverse-channel-mV = <100>;
>  
>  		/*
>  		 * Workaround: Hog the CAMVDD line high as we can't establish a

MBR, Sergei