linux-kernel - Re: [PATCH v8 2/2] drm: bridge: Add thc63lvd1024 LVDS decoder driver

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Message-ID: <241462f3-0396-c763-6fb4-aff8fc5d29bd@mentor.com>
Date:   Thu, 19 Apr 2018 14:18:30 +0300
From:   Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
To:     Jacopo Mondi <jacopo+renesas@...ndi.org>, <architt@...eaurora.org>,
        <a.hajda@...sung.com>, <Laurent.pinchart@...asonboard.com>,
        <airlied@...ux.ie>, <horms@...ge.net.au>, <magnus.damm@...il.com>,
        <geert@...ux-m68k.org>, <niklas.soderlund@...natech.se>,
        <sergei.shtylyov@...entembedded.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>
CC:     <dri-devel@...ts.freedesktop.org>,
        <linux-renesas-soc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 2/2] drm: bridge: Add thc63lvd1024 LVDS decoder driver

Hi Jacopo,

On 04/10/2018 01:53 PM, Jacopo Mondi wrote:
> Add DRM bridge driver for Thine THC63LVD1024 LVDS to digital parallel
> output converter.
> 
> Signed-off-by: Jacopo Mondi <jacopo+renesas@...ndi.org>
> Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>
> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>

Reviewed-by: Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>

Generally I have only one pretty ignorable comment.

> +
> +enum thc63_ports {
> +	THC63_LVDS_IN0,
> +	THC63_LVDS_IN1,
> +	THC63_RGB_OUT0,
> +	THC63_RGB_OUT1,
> +};
> +

The driver uses only THC63_RGB_OUT0 value, or port@2, and MODE{0,1,2} IC
configuration is ignored.

I don't know if right from the beginning it would be better to support
dual-out modes, preferably both single-in and dual-in ones. Will it
impact port enumeration?

I do understand that the extension is possible, and likely only hardware
accessibility postpones it.

--
With best wishes,
Vladimir