linux-kernel - Re: [RFC PATCH v2 1/2] drm: Add generic colorkey properties

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Message-ID: <CAKMK7uGMKs2GgP+nrxDV4LbbmrqcHApLsz9pTc=mQojHtSVaUQ@mail.gmail.com>
Date:   Wed, 20 Jun 2018 12:10:07 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Alexandru Gheorghe <Alexandru_Gheorghe@...tor.com>,
        "open list:DRM DRIVERS FOR RENESAS" 
        <linux-renesas-soc@...r.kernel.org>, linux-tegra@...r.kernel.org,
        Thierry Reding <thierry.reding@...il.com>,
        Ben Skeggs <bskeggs@...hat.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Dmitry Osipenko <digetx@...il.com>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        "open list:DMA BUFFER SHARING FRAMEWORK" 
        <linux-media@...r.kernel.org>
Subject: Re: [RFC PATCH v2 1/2] drm: Add generic colorkey properties

On Wed, Jun 20, 2018 at 11:33 AM, Russell King - ARM Linux
<linux@...linux.org.uk> wrote:
> On Wed, Jun 20, 2018 at 11:17:50AM +0200, Daniel Vetter wrote:
>> Yes -modesetting (or whichever other driver) would need to set up the
>> properties correctly for Xvideo color keying. Since default assumption for
>> all other (generic) compositors is that planes won't do any color keying
>> in the boot-up state.
>
> Thanks, is that documented anywhere?

With the standardization of properties I'm also trying to get these
expectations better documented, e.g.

https://dri.freedesktop.org/docs/drm/gpu/drm-kms.html#plane-composition-properties

But I think we're not doing a good job yet documenting default
expectations. But the above would be a good place to get that fixed -
this patch here should do that, at least for color keying.
-Daniel

>
> --
> RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
> FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch