Message-ID: <40a7e1171d7777128c0728a28a029e6f3643145a.camel@ndufresne.ca>
Subject: Re: [PATCH v2 1/2] media: meson: vdec: implement 10bit bitstream
 handling
From:   Nicolas Dufresne <nicolas@ndufresne.ca>
To:     neil.armstrong@linaro.org,
        Christian Hewitt <christianshewitt@gmail.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Kevin Hilman <khilman@baylibre.com>,
        Jerome Brunet <jbrunet@baylibre.com>,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
        linux-media@vger.kernel.org, linux-amlogic@lists.infradead.org,
        linux-staging@lists.linux.dev,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc:     Benjamin Roszak <benjamin545@gmail.com>
Date:   Tue, 24 Jan 2023 16:19:11 -0500
In-Reply-To: <95132025-8f0f-8179-40b7-8bf83458886a@linaro.org>
References: <20230124034058.3407235-1-christianshewitt@gmail.com>
         <20230124034058.3407235-2-christianshewitt@gmail.com>
         <6ff68c4bea9d48980853e9af9db1fc0bf13976ae.camel@ndufresne.ca>
         <07933226-fbab-fa78-6b96-38e365577605@linaro.org>
         <478d5a7569b7879aa3410a5b3049d745867df780.camel@ndufresne.ca>
         <95132025-8f0f-8179-40b7-8bf83458886a@linaro.org>
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Hi Neil,

Le mardi 24 janvier 2023 =C3=A0 17:51 +0100, neil.armstrong@linaro.org a =
=C3=A9crit=C2=A0:
> We hoped we could use the same modifier as DRM, but it seems this is now =
out of scope.
>=20
> Neil

Its not out of scope, its just not being worked on. There is no infra to su=
pport
an extra 64bit modifier in V4L2 atm, or to use DRM formats in general. Folk=
s
form Qualcomm or Mediatek didn't want to do it, so they worked around by ad=
ding
their strictly needed subset of compressed formats. If you don't want this,=
 then
fine, but I'm not aware of someone actively working on that today.

I was just curious if there was anything other then NV12 (something 10bit) =
on
the secondary buffer case, that was my initial question here ;-D.

Nicolas