Re: [PATCH 5/7] arm64: dts: renesas: eagle: Enable DU

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Jacopo Mondi <jacopo+renesas@jmondi.org>
Cc: horms@verge.net.au, magnus.damm@gmail.com, geert@linux-m68k.org,
	niklas.soderlund@ragnatech.se,
	sergei.shtylyov@cogentembedded.com,
	dri-devel@lists.freedesktop.org,
	linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 5/7] arm64: dts: renesas: eagle: Enable DU
Date: Fri, 06 Apr 2018 16:45:16 +0300	[thread overview]
Message-ID: <35431593.B1LTs037XF@avalon> (raw)
In-Reply-To: <1523020092-25540-6-git-send-email-jacopo+renesas@jmondi.org>

Hi Jacopo,

Thank you for the patch.

On Friday, 6 April 2018 16:08:10 EEST Jacopo Mondi wrote:
> Enable DU for Renesas R-Car V3M Eagle board.
> 
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> ---
>  arch/arm64/boot/dts/renesas/r8a77970-eagle.dts | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts index 3c5f598..144b847
> 100644
> --- a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> +++ b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> @@ -76,6 +76,11 @@
>  		function = "i2c0";
>  	};
> 
> +	du_pins: du {
> +		groups = "du_rgb666", "du_sync", "du_oddf", "du_clk_out";
> +		function = "du";
> +	};

As far as I can tell the DU parallel output isn't used on the Eagle board, but 
is used on the Eagle expansion board. I would move this to patch 7/7 in this 
series.

>  	scif0_pins: scif0 {
>  		groups = "scif0_data";
>  		function = "scif0";
> @@ -93,3 +98,9 @@
> 
>  	status = "okay";
>  };
> +
> +&du {
> +	pinctrl-0 = <&du_pins>;
> +	pinctrl-names = "default";

These two properties should be moved to patch 7/7 too.

> +	status = "okay";
> +};

There's little use for enabling the DU in DT if you have no output port 
described. I'd move this to patch 6/7.

-- 
Regards,

Laurent Pinchart