linux-kernel - Re: [PATCH 1/3] dt-bindings: change the A64 HDMI PHY binding to R40

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Date:   Wed, 5 Sep 2018 09:14:35 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH 1/3] dt-bindings: change the A64 HDMI PHY binding to R40

On Mon, Sep 03, 2018 at 09:34:32PM +0800, Icenowy Zheng wrote:
> By experiment, the A64 HDMi PHY doesn't support the PLL-VIDEO mux
> introduced in R40, although it has two PLL-VIDEOs.
> 
> Change the A64 HDMI PHY binding to R40 one.
> 
> This binding is introduced in v4.19, which is still in RC stage, so we
> have change to fix it.
> 
> Signed-off-by: Icenowy Zheng <icenowy@...c.io>

That doesn't make much sense. The A64 doesn't have any particular
reason to behave like the R40, and the R40 can definitely use a
different compatible if it has a different behaviour. But I don't see
*why* the A64 not behaving like the R40 is a justification to remove
the A64 compatible. Especially when the R40 was released later.

Add a new compatible, and leave the A64 compatible alone.

Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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