From: Nicolas Dufresne <nicolas.dufresne@gmail.com>
To: "Wu-Cheng Li (李務誠)" <wuchengli@chromium.org>,
"tiffany lin" <tiffany.lin@mediatek.com>
Cc: Hans Verkuil <hverkuil@xs4all.nl>,
Hans Verkuil <hans.verkuil@cisco.com>,
Daniel Thompson <daniel.thompson@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Daniel Kurtz <djkurtz@chromium.org>,
Pawel Osciak <posciak@chromium.org>,
Eddie Huang <eddie.huang@mediatek.com>,
Yingjoe Chen <yingjoe.chen@mediatek.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org, linux-mediatek@lists.infradead.org,
Lin PoChun <PoChun.Lin@mediatek.com>
Subject: Re: [PATCH v3 3/9] DocBook/v4l: Add compressed video formats used on MT8173 codec driver
Date: Tue, 12 Jul 2016 15:14:02 -0400 [thread overview]
Message-ID: <1468350842.8843.18.camel@gmail.com> (raw)
In-Reply-To: <1468350511.8843.16.camel@gmail.com>
Le mardi 12 juillet 2016 à 15:08 -0400, Nicolas Dufresne a écrit :
> Le mardi 12 juillet 2016 à 16:16 +0800, Wu-Cheng Li (李務誠) a écrit :
> > Decoder hardware produces MT21 (compressed). Image processor can
> > convert it to a format that can be input of display driver.
> > Tiffany.
> > When do you plan to upstream image processor (mtk-mdp)?
> > >
> > > It can be as input format for encoder, MDP and display drivers in
> > our
> > > platform.
> > I remember display driver can only accept uncompressed MT21. Right?
> > Basically V4L2_PIX_FMT_MT21 is compressed and is like an opaque
> > format. It's not usable until it's decompressed and converted by
> > image
> > processor.
>
> Previously it was described as MediaTek block mode, and now as a
> MediaTek compressed format. It makes me think you have no idea what
> this pixel format really is. Is that right ?
>
> The main reason why I keep asking, is that we often find similarities
> between what vendor like to call their proprietary formats. Doing the
> proper research helps not creating a mess like in Android where you
> have a lot of formats that all point to the same format. I believe
> there was the same concern when Samsung wanted to introduce their Z-
> flip-Z NV12 tile format. In the end they simply provided sufficient
> documentation so we could document it and implement software
> converters
> for test and validation purpose.
Here's the kind of information we want in the documentation.
https://chromium.googlesource.com/chromium/src/media/+/master/base/vide
o_types.h#40
// MediaTek proprietary format. MT21 is similar to NV21 except the memory
// layout and pixel layout (swizzles). 12bpp with Y plane followed by a 2x2
// interleaved VU plane. Each image contains two buffers -- Y plane and VU
// plane. Two planes can be non-contiguous in memory. The starting addresses
// of Y plane and VU plane are 4KB alignment.
// Suppose image dimension is (width, height). For both Y plane and VU plane:
// Row pitch = ((width+15)/16) * 16.
// Plane size = Row pitch * (((height+31)/32)*32)
Now obviously this is incomplete, as the swizzling need to be documented of course.
>
> regards,
> Nicolas
next prev parent reply other threads:[~2016-07-12 19:14 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-30 12:29 [PATCH v3 0/9] Add MT8173 Video Decoder Driver Tiffany Lin
2016-05-30 12:29 ` [PATCH v3 1/9] VPU: mediatek: Add decode support Tiffany Lin
2016-05-30 12:29 ` [PATCH v3 2/9] v4l: add Mediatek compressed video block format Tiffany Lin
2016-05-30 12:29 ` [PATCH v3 3/9] DocBook/v4l: Add compressed video formats used on MT8173 codec driver Tiffany Lin
2016-05-30 12:29 ` [PATCH v3 4/9] dt-bindings: Add a binding for Mediatek Video Decoder Tiffany Lin
2016-05-30 12:29 ` [PATCH v3 5/9] vcodec: mediatek: Add Mediatek V4L2 Video Decoder Driver Tiffany Lin
2016-05-30 12:29 ` [PATCH v3 6/9] vcodec: mediatek: Add Mediatek H264 " Tiffany Lin
2016-05-30 12:29 ` [PATCH v3 7/9] vcodec: mediatek: Add Mediatek VP8 " Tiffany Lin
2016-05-30 12:29 ` [PATCH v3 8/9] vcodec: mediatek: Add Mediatek VP9 " Tiffany Lin
2016-05-30 12:29 ` [PATCH v3 9/9] arm64: dts: mediatek: Add Video Decoder for MT8173 Tiffany Lin
2016-07-08 11:06 ` [PATCH v3 5/9] vcodec: mediatek: Add Mediatek V4L2 Video Decoder Driver Hans Verkuil
2016-08-01 9:38 ` Tiffany Lin
2016-08-01 10:39 ` Hans Verkuil
2016-08-01 11:28 ` Tiffany Lin
2016-07-08 10:23 ` [PATCH v3 3/9] DocBook/v4l: Add compressed video formats used on MT8173 codec driver Hans Verkuil
2016-07-11 2:56 ` tiffany lin
2016-07-12 8:16 ` Wu-Cheng Li (李務誠)
2016-07-12 19:08 ` Nicolas Dufresne
2016-07-12 19:14 ` Nicolas Dufresne [this message]
2016-07-12 19:31 ` Ian Arkver
2016-07-13 2:00 ` tiffany lin
2016-07-13 13:55 ` Nicolas Dufresne
2016-07-14 7:30 ` tiffany lin
2016-07-13 2:22 ` Wu-Cheng Li (李務誠)
2016-07-13 1:50 ` tiffany lin
2016-07-13 2:03 ` tiffany lin
2016-06-07 14:22 ` [PATCH v3 0/9] Add MT8173 Video Decoder Driver Mauro Carvalho Chehab
2016-06-07 22:13 ` Hans Verkuil
2016-06-14 8:44 ` Wu-Cheng Li (李務誠)
2016-06-14 11:08 ` tiffany lin
2016-06-16 10:54 ` Mauro Carvalho Chehab
2016-07-01 10:11 ` Hans Verkuil
2016-07-01 10:47 ` Wu-Cheng Li (李務誠)
2016-07-01 11:53 ` andrew-ct chen
2016-07-01 12:00 ` Hans Verkuil
2016-07-04 11:09 ` andrew-ct chen
2016-07-06 13:19 ` Hans Verkuil
2016-07-07 10:16 ` tiffany lin
2016-07-07 11:13 ` Hans Verkuil
2016-07-08 11:44 ` Hans Verkuil
2016-07-11 3:58 ` tiffany lin
2016-07-21 9:12 ` tiffany lin
2016-08-15 8:30 ` Hans Verkuil
2016-08-15 9:03 ` Tiffany Lin
2016-08-15 9:07 ` Hans Verkuil
2016-08-15 9:10 ` Tiffany Lin
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