linux-kernel - Re: [PATCH 8/8] drm/bridge: it66121: Allow link this driver as a lib

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Date:   Fri, 24 Nov 2023 00:29:49 +0800
From:   Sui Jingfeng <sui.jingfeng@...ux.dev>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Phong LE <ple@...libre.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Maxime Ripard <mripard@...nel.org>,
        Sui Jingfeng <suijingfeng@...ngson.cn>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Thomas Zimmermann <tzimmermann@...e.de>
Subject: Re: [PATCH 8/8] drm/bridge: it66121: Allow link this driver as a lib

Hi,

On 2023/11/24 00:06, Dmitry Baryshkov wrote:
> On Thu, 23 Nov 2023 at 17:41, Sui Jingfeng <sui.jingfeng@...ux.dev> wrote:
>> Hi,
>>
>>
>> On 2023/11/23 16:08, Dmitry Baryshkov wrote:
>>>> The semantics of DRM_BRIDGE_ATTACH_NO_CONNECTOR flag are implement-defined,
>>> No, they are not. Semantics are pretty simple: do not create the
>>> drm_connector instance. Pass the flag to the next bridge in the chain.
>>
>> Then, my problem is that do we allow create a drm_connector instance in drm bridge
>> driver nowadays?
> Yes, if there is no DRM_BRIDGE_ATTACH_NO_CONNECTOR. But that's deprecated IMO.

Then can you read the code in bridge/ti-tfp410.c please?
The tfp410_attach() function will create drm_connector instance manually
if the conditional (flags == 0) is true.