linux-kernel - Re: [PATCH 12/17] drm/sun4i: Add CCSC property to DE2 configuration

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Message-ID: <20171128204353.imy2rd6fy7hzrvzg@flea.home>
Date:   Tue, 28 Nov 2017 21:43:53 +0100
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     Jernej Skrabec <jernej.skrabec@...l.net>, wens@...e.org,
        airlied@...ux.ie, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH 12/17] drm/sun4i: Add CCSC property to DE2 configuration

On Tue, Nov 28, 2017 at 08:02:26PM +0800, Icenowy Zheng wrote:
> 在 2017-11-28 04:57，Jernej Skrabec 写道：
> > Base addresses of channel output CSC (CCSC) depends whether mixer in
> > question is first or second and if it is second, if supports VEP or not.
> > This new property will tell which set of base addresses to take.
> > 
> > 0 - first mixer or second mixer with VEP support
> > 1 - second mixer without VEP support
> 
> Maxime,
> 
> I think here the ID of the mixer matters.
> 
> P.S. I didn't found any SoC with a second mixer with VEP currently

Then we'll have an allwinner,has-vep; property (or whatever) for all
those SoCs' mixer0. What's the big deal about it?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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