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

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Message-ID: <965ca520-229f-5729-bf06-ae64ed3af383@189.cn>
Date:   Wed, 16 Feb 2022 21:34:47 +0800
From:   Sui Jingfeng <15330273260@....cn>
To:     Maxime Ripard <maxime@...no.tech>
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 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]


[1] ./drivers/gpu/drm/tegra/output.c

[2] 
https://docs.nvidia.com/drive/active/5.0.10.3L/nvvib_docs/index.html#page/NVIDIA%20DRIVE%20Linux%20SDK%20Development%20Guide/Appendix/AppendixDeviceTree.html