linux-kernel - Re: [PATCH v4 9/9] drm/bridge: tfp410: Add platform module alias

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Date: Tue, 23 Apr 2024 10:05:38 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Sui Jingfeng <sui.jingfeng@...ux.dev>,
 Neil Armstrong <neil.armstrong@...aro.org>
Cc: Robert Foss <rfoss@...nel.org>,
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
 Andrzej Hajda <andrzej.hajda@...el.com>, Jonas Karlman <jonas@...boo.se>,
 Jernej Skrabec <jernej.skrabec@...il.com>, Maxime Ripard
 <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
 Phong LE <ple@...libre.com>, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 9/9] drm/bridge: tfp410: Add platform module alias

On 22/04/2024 21:19, Sui Jingfeng wrote:
> Otherwise when compiled as module, this driver will not be probed on
> non-DT environment. This is a fundamential step to make this driver
> truely OF-independent.

NAK.

You should not need MODULE_ALIAS() in normal cases. If you need it,
usually it means your device ID table is wrong (e.g. misses either
entries or MODULE_DEVICE_TABLE()). MODULE_ALIAS() is not a substitute
for incomplete ID table.

Just check your aliases and look what is there. You already have
i2c:tfp410 alias. If you need platform one, for some reason, explain
what is your matching path and add appropriate ID table. With that
explanation, of course.

Best regards,
Krzysztof