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From:   Brian Starkey <Brian.Starkey@arm.com>
To:     "james qian wang (Arm Technology China)" <james.qian.wang@arm.com>
CC:     "Lowry Li (Arm Technology China)" <Lowry.Li@arm.com>,
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        Mihail Atanassov <Mihail.Atanassov@arm.com>,
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        nd <nd@arm.com>
Subject: Re: [PATCH] drm/komeda: Adds output-color format/depth support
Thread-Topic: [PATCH] drm/komeda: Adds output-color format/depth support
Thread-Index: AQHVb5fml3iiEtk+MEOqXjNduhm+kKc5MiiAgADp5ICAAhFyAIACqBcAgAVBDQA=
Date:   Mon, 30 Sep 2019 10:36:27 +0000
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On Fri, Sep 27, 2019 at 02:22:24AM +0000, james qian wang (Arm Technology C=
hina) wrote:
> On Wed, Sep 25, 2019 at 09:48:11AM +0000, Brian Starkey wrote:
> > Hi James,
> >=20
> > On Tue, Sep 24, 2019 at 02:13:27AM +0000, james qian wang (Arm Technolo=
gy China) wrote:
> > >=20
> > > Hi Brian:
> > >=20
> > > Since one monitor can support mutiple color-formats, this DT property
> > > supply a way for user to select a specific one from this supported
> > > color-formats.
> >=20
> > Modifying DT is a _really_ user-unfriendly way of specifying
> > preferences. If we want a user to be able to pick a preferred format,
> > then it should probably be via the atomic API as Ville mentioned.
> >
>=20
> Hi Brian:
>=20
> Agree, a drm UPAI might be the best & right way for this.
>=20
> I can raise a new thread/topic to discuss the "HOW TO", maybe after the
> Chinese national day.
>=20
> LAST:
> what do you think about this patch:
> - Just drop it, waiting for the new uapi
> - or keep it, and replace it once new uapi is ready.

The bit-depth stuff is clear and non-controversial, so you could split
that out and merge it.

For the YUV stuff, I think it would be fine to merge the
implementation that we discussed here - force YUV for modes which must
be YUV, and leave the user-preference stuff for a later UAPI.

Thanks,
-Brian

>=20
> Thanks
> James
>=20
> > Cheers,
> > -Brian