linux-kernel - Re: [PATCH v6 1/3] drm/lsdc: add drm driver for loongson display controller

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Message-ID: <20220216141127.2b7frii62w7xp3tu@houat>
Date:   Wed, 16 Feb 2022 15:11:27 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Sui Jingfeng <15330273260@....cn>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Roland Scheidegger <sroland@...are.com>,
        Zack Rusin <zackr@...are.com>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Andrey Zhizhikin <andrey.zhizhikin@...ca-geosystems.com>,
        Sam Ravnborg <sam@...nborg.org>,
        suijingfeng <suijingfeng@...ngson.cn>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH v6 1/3] drm/lsdc: add drm driver for loongson display
 controller



On Wed, Feb 16, 2022 at 09:34:47PM +0800, Sui Jingfeng wrote:
> On 2022/2/10 00:16, Maxime Ripard wrote:
> > And, to reinstate, we already have a mechanism to set an EDID, and if it
> > wasn't an option, the DT is not the place to store an EDID blob.
> 
> Hi,
> 
> 
> if DT is not the place to store EDID blob, why nvidia can do that ?
> 
> output->edid = of_get_property(output->of_node, "nvidia,edid", &size);
> [1][2]

Because that binding is 10 years old and never got reviewed by a DT maintainer.

Things change, some things we did in the past have been mistakes that we
don't want to repeat, can we move forward?

Maxime

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