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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hrJSl-0007aF-8Y; Sat, 27 Jul 2019 09:58:03 +0000 Received: from relay2-d.mail.gandi.net ([217.70.183.194]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hrJSg-0007ZJ-Rf for linux-arm-kernel@lists.infradead.org; Sat, 27 Jul 2019 09:58:01 +0000 X-Originating-IP: 176.158.46.5 Received: from aptenodytes (static-176-158-46-5.ftth.abo.bbox.fr [176.158.46.5]) (Authenticated sender: paul.kocialkowski@bootlin.com) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id BC06740004; Sat, 27 Jul 2019 09:57:29 +0000 (UTC) Date: Sat, 27 Jul 2019 11:57:29 +0200 From: Paul Kocialkowski To: Hans Verkuil Subject: Re: [PATCH v7 0/4] HEVC/H.265 stateless support for V4L2 and Cedrus Message-ID: <20190727095729.GD16618@aptenodytes> References: <20190725185602.22522-1-paul.kocialkowski@bootlin.com> <7fa38a2c-8e16-5e88-d073-1d04e9feaa84@xs4all.nl> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <7fa38a2c-8e16-5e88-d073-1d04e9feaa84@xs4all.nl> User-Agent: Mutt/1.12.1 (2019-06-15) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190727_025759_214427_BF695AD1 X-CRM114-Status: GOOD ( 23.34 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devel@driverdev.osuosl.org, Nicolas Dufresne , Jernej Skrabec , Tomasz Figa , Sakari Ailus , Alexandre Courbot , Jonas Karlman , Maxime Ripard , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Chen-Yu Tsai , linux-sunxi@googlegroups.com, Boris Brezillon , Thomas Petazzoni , Mauro Carvalho Chehab , Ezequiel Garcia , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Hans, On Fri 26 Jul 19, 10:33, Hans Verkuil wrote: > On 7/25/19 8:55 PM, Paul Kocialkowski wrote: > > HEVC/H.265 stateless support for V4L2 and Cedrus > > > > 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. > > > > 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. > > > > Since this is the first proposal for stateless HEVC/H.265 support in > > V4L2, reviews and comments about the controls definitions are > > particularly welcome. > > > > 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. > > > > Changes since v6: > > * Rebased on latest media tree from Hans; > > Which tree is that? Or are you just referring our media_tree master > branch? (which isn't 'my' tree :-) ) I'm usually rebasing on the tree you use to send PRs to Mauro, at: https://git.linuxtv.org/hverkuil/media_tree.git/ which is usually the best up-to-date stateless codec support tree :) Cheers, Paul > Regards, > > Hans > > > * Reordered some fields to avoid holes and multi-padding; > > * Updated the documentation. > > > > 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. > > > > Changes since v4: > > * Rebased atop latest H.254 series. > > > > 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. > > > > 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. > > > > 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. > > > > Cheers! > > > > Paul Kocialkowski (4): > > media: v4l2-ctrl: Add a comment on why we zero out compound controls > > fields > > media: v4l: Add definitions for the HEVC slice controls > > media: pixfmt: Document the HEVC slice pixel format > > media: cedrus: Add HEVC/H.265 decoding support > > > > Documentation/media/uapi/v4l/biblio.rst | 9 + > > .../media/uapi/v4l/ext-ctrls-codec.rst | 486 +++++++++++++- > > .../media/uapi/v4l/pixfmt-compressed.rst | 21 + > > .../media/uapi/v4l/vidioc-queryctrl.rst | 18 + > > .../media/videodev2.h.rst.exceptions | 3 + > > drivers/media/v4l2-core/v4l2-ctrls.c | 93 +++ > > drivers/media/v4l2-core/v4l2-ioctl.c | 1 + > > drivers/staging/media/sunxi/cedrus/Makefile | 2 +- > > drivers/staging/media/sunxi/cedrus/cedrus.c | 31 +- > > 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 | 198 ++++++ > > include/media/v4l2-ctrls.h | 7 + > > 17 files changed, 1789 insertions(+), 8 deletions(-) > > create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_h265.c > > create mode 100644 include/media/hevc-ctrls.h > > > -- Paul Kocialkowski, Bootlin Embedded Linux and kernel engineering https://bootlin.com _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel