linux-kernel - Re: [PATCH] media: renesas: vsp1: blacklist r8a7795 ES1.*

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Message-ID: <Y/3UNv4a9xmAR+54@duo.ucw.cz>
Date:   Tue, 28 Feb 2023 11:15:18 +0100
From:   Pavel Machek <pavel@....cz>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        linux-renesas-soc@...r.kernel.org,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: renesas: vsp1: blacklist r8a7795 ES1.*

Hi!

> > I prefer blacklisting in the driver, as dropping them from r8a77950.dtsi
> > wouldn't disable them when used with an older or out-of-tree DTB.
> 
> Is that really a use case we need to care about ? Who will run a recent
> kernel with an old DTB on a H3 ES1.x, without an easy way to update to a
> mainline device tree ? It's not like those devices went into production.

There's some agreement that DTBs are an ABI, and that they should work
with old and new kernels. Disabling it in the driver seems like right
solution.

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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