linux-kernel - Re: [PATCH v2] drm/sun4i: sun4i: Introduce a quirk for lowest plane alpha support

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Date:   Wed, 18 Jul 2018 17:23:41 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH v2] drm/sun4i: sun4i: Introduce a quirk for lowest plane
 alpha support

On Wed, Jul 18, 2018 at 11:35:23AM +0200, Paul Kocialkowski wrote:
> On Wed, 2018-07-18 at 11:29 +0200, Paul Kocialkowski wrote:
> > Not all sunxi platforms with the first version of the Display Engine
> > support an alpha component on the plane with the lowest z position
> > (as in: lowest z-pos), that gets blended with the background color.
> > 
> > In particular, the A13 is known to have this limitation. However, it was
> > recently discovered that the A20 and A33 are capable of having alpha on
> > their lowest plane.
> > 
> > Thus, this introduces a specific quirk to indicate such support,
> > per-platform. Since this was not tested on sun4i and sun6i platforms, a
> > conservative approach is kept and this feature is not supported.
> 
> Woops, I forgot to include PATCH 1/2 from v1, which did not change.
> 
> Would it be preferable for me to send v2 again (and maybe call it v3)
> for convenience?

Yeah, resend it, and call it v2 resend (explaining why a resend was
needed).

Maxime


-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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