Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Wed, 9 Oct 2019 09:12:24 +0200
From:   Paul Kocialkowski <paul.kocialkowski@bootlin.com>
To:     Jernej =?utf-8?Q?=C5=A0krabec?= <jernej.skrabec@siol.net>
Cc:     linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Chen-Yu Tsai <wens@csie.org>,
        Maxime Ripard <mripard@bootlin.com>,
        Hans Verkuil <hverkuil@xs4all.nl>,
        Ezequiel Garcia <ezequiel@collabora.com>,
        Tomasz Figa <tfiga@chromium.org>,
        Nicolas Dufresne <nicolas@ndufresne.ca>,
        Jonas Karlman <jonas@kwiboo.se>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: Re: [PATCH v8 0/3] HEVC/H.265 stateless support for V4L2 and Cedrus
Message-ID: <20191009071224.GA592742@aptenodytes>
References: <20190927143411.141526-1-paul.kocialkowski@bootlin.com>
 <9239760.nWnt09pPvv@jernej-laptop>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha256;
        protocol="application/pgp-signature"; boundary="8t9RHnE3ZwKMSgU+"
Content-Disposition: inline
In-Reply-To: <9239760.nWnt09pPvv@jernej-laptop>
User-Agent: Mutt/1.12.2 (2019-09-21)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


--8t9RHnE3ZwKMSgU+
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Hi,

On Tue 08 Oct 19, 23:48, Jernej =C5=A0krabec wrote:
> Dne petek, 27. september 2019 ob 16:34:08 CEST je Paul Kocialkowski=20
> napisal(a):
> > HEVC/H.265 stateless support for V4L2 and Cedrus
> >=20
> > This is early support for HEVC/H.265 stateless decoding in V4L2,
> > including both definitions and driver support for the Cedrus VPU
> > driver, which concerns Allwinner devices.
> >=20
> > A specific pixel format is introduced for the HEVC slice format and
> > controls are provided to pass the bitstream metadata to the decoder.
> > Some bitstream extensions are intentionally not supported at this point.
> >=20
> > Since this is the first proposal for stateless HEVC/H.265 support in
> > V4L2, reviews and comments about the controls definitions are
> > particularly welcome.
> >=20
> > On the Cedrus side, the H.265 implementation covers frame pictures
> > with both uni-directional and bi-direction prediction modes (P/B
> > slices). Field pictures (interleaved), scaling lists and 10-bit output
> > are not supported at this point.
>=20
> Whole series is:
> Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
>=20
> Hopefully this can be merged soon.

Thanks for the review!

I don't see any blockers left so hopefully it will happen soon :)

Cheers,

Paul

> >=20
> > Changes since v7:
> > * Rebased on latest media tree;
> > * Fixed holes in structures for cacheline alignment;
> > * Added decode mode and start code controls
> >   (only per-slice and no start code is supported at this point).
> >=20
> > Changes since v6:
> > * Rebased on latest media tree from Hans;
> > * Reordered some fields to avoid holes and multi-padding;
> > * Updated the documentation.
> >=20
> > Changes since v5:
> > * Rebased atop latest next media tree;
> > * Moved to flags instead of u8 fields;
> > * Added padding to ensure 64-bit alignment
> >   (tested with GDB on 32 and 64-bit architectures);
> > * Reworked cedrus H.265 driver support a bit for flags;
> > * Split off codec-specific control validation and init;
> > * Added HEVC controls fields cleanup at std_validate to allow reliable
> >   control comparison with memcmp;
> > * Fixed various misc reported mistakes.
> >=20
> > Changes since v4:
> > * Rebased atop latest H.254 series.
> >=20
> > Changes since v3:
> > * Updated commit messages;
> > * Updated CID base to avoid conflicts;
> > * Used cpu_to_le32 for packed le32 data;
> > * Fixed misc minor issues in the drive code;
> > * Made it clear in the docs that the API will evolve;
> > * Made the pixfmt private and split commits about it.
> >=20
> > Changes since v2:
> > * Moved headers to non-public API;
> > * Added H265 capability for A64 and H5;
> > * Moved docs to ext-ctrls-codec.rst;
> > * Mentionned sections of the spec in the docs;
> > * Added padding to control structures for 32-bit alignment;
> > * Made write function use void/size in bytes;
> > * Reduced the number of arguments to helpers when possible;
> > * Removed PHYS_OFFSET since we already set PFN_OFFSET;
> > * Added comments where suggested;
> > * Moved to timestamp for references instead of index;
> > * Fixed some style issues reported by checkpatch.
> >=20
> > Changes since v1:
> > * Added a H.265 capability to whitelist relevant platforms;
> > * Switched over to tags instead of buffer indices in the DPB
> > * Declared variable in their reduced scope as suggested;
> > * Added the H.265/HEVC spec to the biblio;
> > * Used in-doc references to the spec and the required APIs;
> > * Removed debugging leftovers.
> >=20
> > Cheers!
> >=20
> > Paul Kocialkowski (3):
> >   media: v4l: Add definitions for HEVC stateless decoding
> >   media: pixfmt: Document the HEVC slice pixel format
> >   media: cedrus: Add HEVC/H.265 decoding support
> >=20
> >  Documentation/media/uapi/v4l/biblio.rst       |   9 +
> >  .../media/uapi/v4l/ext-ctrls-codec.rst        | 553 +++++++++++++++-
> >  .../media/uapi/v4l/pixfmt-compressed.rst      |  23 +
> >  .../media/uapi/v4l/vidioc-queryctrl.rst       |  18 +
> >  .../media/videodev2.h.rst.exceptions          |   3 +
> >  drivers/media/v4l2-core/v4l2-ctrls.c          | 108 ++-
> >  drivers/media/v4l2-core/v4l2-ioctl.c          |   1 +
> >  drivers/staging/media/sunxi/cedrus/Makefile   |   2 +-
> >  drivers/staging/media/sunxi/cedrus/cedrus.c   |  52 +-
> >  drivers/staging/media/sunxi/cedrus/cedrus.h   |  18 +
> >  .../staging/media/sunxi/cedrus/cedrus_dec.c   |   9 +
> >  .../staging/media/sunxi/cedrus/cedrus_h265.c  | 616 ++++++++++++++++++
> >  .../staging/media/sunxi/cedrus/cedrus_hw.c    |   4 +
> >  .../staging/media/sunxi/cedrus/cedrus_regs.h  | 271 ++++++++
> >  .../staging/media/sunxi/cedrus/cedrus_video.c |  10 +
> >  include/media/hevc-ctrls.h                    | 212 ++++++
> >  include/media/v4l2-ctrls.h                    |   7 +
> >  17 files changed, 1907 insertions(+), 9 deletions(-)
> >  create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_h265.c
> >  create mode 100644 include/media/hevc-ctrls.h
>=20
>=20
>=20
>=20

--=20
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

--8t9RHnE3ZwKMSgU+
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----

iQEzBAEBCAAdFiEEJZpWjZeIetVBefti3cLmz3+fv9EFAl2diFgACgkQ3cLmz3+f
v9Eohwf/ZlxL7ifHgw9cUCh1aR/yWxNop4uCtKfh3Udb+L0GIvIQ+4U97cwMTMhj
YzKsJVX3xWF1Dazh1A6yANdrbt7TkXZLEBB4Mez+6BqNYXm6L+Lad/lERGsXJJnC
6rJ5lc+14Ps8twgkrZ0/05K0b9AuWTEZQVmvWy27XWrNMF5AyYKjsYb3YeiQ7z6Y
AvLQMZaqsN+XAdt8wq4gP5X3vNOwr9R+LubEf3TJ/jmHDgOog4x/+d7xhiwyhMJC
fe+1w7DjtAgV31UxirygRQC6SuXIZCUQ4DaRsO84Qd8KZw5D75YITMXniW7G7QGc
SZX7hgglVg3W4jJGDa+caSfN9LeLNQ==
=bGSK
-----END PGP SIGNATURE-----

--8t9RHnE3ZwKMSgU+--