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Fri, 06 Mar 2020 08:17:58 -0800 (PST) Date: Fri, 6 Mar 2020 18:17:47 +0200 From: Pekka Paalanen To: Neil Armstrong Subject: Re: [PATCH 1/4] drm/fourcc: Add modifier definitions for describing Amlogic Video Framebuffer Compression Message-ID: <20200306181747.5dbda69d@eldfell.localdomain> In-Reply-To: <27d09559-055a-7bf3-0f23-9948da0e1f76@baylibre.com> References: <20200221090845.7397-1-narmstrong@baylibre.com> <20200221090845.7397-2-narmstrong@baylibre.com> <20200303121029.5532669d@eldfell.localdomain> <20200303105325.bn4sob6yrdf5mwrh@DESKTOP-E1NTVVP.localdomain> <20200303152541.68ab6f3d@eldfell.localdomain> <20200303173332.1c6daa09@eldfell.localdomain> <20200306101328.GR2363188@phenom.ffwll.local> <27d09559-055a-7bf3-0f23-9948da0e1f76@baylibre.com> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200306_081801_034184_0CD40AA5 X-CRM114-Status: GOOD ( 13.22 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Linux Kernel Mailing List , dri-devel , Daniel Vetter , linux-amlogic@lists.infradead.org, nd , Brian Starkey , Linux ARM Content-Type: multipart/mixed; boundary="===============7289532601328665607==" Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org --===============7289532601328665607== Content-Type: multipart/signed; micalg=pgp-sha256; boundary="Sig_/QRgxWOW3=LdfxDd168gPaIX"; protocol="application/pgp-signature" --Sig_/QRgxWOW3=LdfxDd168gPaIX Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Fri, 6 Mar 2020 15:40:01 +0100 Neil Armstrong wrote: > Hi Pekka, Brian, Daniel, >=20 > On 06/03/2020 11:13, Daniel Vetter wrote: > > On Tue, Mar 03, 2020 at 05:33:32PM +0200, Pekka Paalanen wrote: =20 ... > >> Sorry, it's waypipe, not pipewire: > >> https://gitlab.freedesktop.org/mstoeckl/waypipe/ =20 > >=20 > > I do think this is very much something we want to make possible. They > > might pick a silly modifier (compression modifiers only compress bw, by > > necessity the lossless ones have to increase storage space so kinda dumb > > thing to push over the network if you don't add .xz or whatever on top)= . =20 >=20 > The AFBC, and Amlogic FBC are not size optimized compressions, but really > layout and memory access optimized compressions, without a proper network > size compression, transferring plain NV12 would be the same. FWIW, waypipe is not intended to be the most efficient network streaming protocol, but it is intended to be a direct Wayland protocol proxy (X11 forwarding, anyone?), which means that it needs to be able to transmit also dmabuf buffers as is. It does not want to understand modifiers but just send opaque data. It may or may not do lossless compression of the data it sends over the wire, but it will replicate the dmabuf on the remote end. Or so I'm told. Thanks, pq --Sig_/QRgxWOW3=LdfxDd168gPaIX Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEJQjwWQChkWOYOIONI1/ltBGqqqcFAl5id6sACgkQI1/ltBGq qqd8PhAArj8wtOHDFlSHaRYFMSEtCurAGSLkUTpmQWl6J1kvS7Stv5XI9jgfSCws IITQFVQc/DxIvzf4KO9zECMi+oIrhw3vyrvJEIErhE6LuZdqgR2MNP3ATNBKU8WR OTEawk87ZvZQENGUYPiV9R3uF0+yr2Qlz2FqmizM8lD6fmWXV1QBBKr8AgkZ+/qK E4e6GRAn+3mBZLS4dxEeU/pATGoZNnOoMpmp/z27AIaibtN88Qpzxy+WtyYUREGm oTjidQaSOgwEt8nDdhdTFCfZcN4HwH8n5p5JleSvKVziTQlTy5IQZasa5ViuX0wB eC+x6OmdrxZ0wBuDfZBp26jKmWP3QDxfwaL+QCRnor+9Ao7Tty9MoGVAbPuy1mwc SzJpjIYsY0OGIjp6OL/Isi5wPZbawkeifutoPVdo9o9PdRIzhR3PJtoOZPN8Ywva yFP28GivCkapKxSlM3NDDjzA5dT+rUFEeBGurXuZqPZe9rKocN2CmXQ96wsmYJ/a WMsJNg7EiswQoUf/JadWfm5dpSK42wyGGs9M1i6yRpTo+QGGzQVkmT5Kx7uLAd+p vuYVc+bNjwNeELU4UhEBXZVWM3n7l7OIcL38NshrnBhdOs0Zy/ElXnSmHkgpccbv sfZp+i8Id5jdyzKGwzbFsG8OQ/zlUyM9B7yhHhejzP7Q482a3gA= =KY6f -----END PGP SIGNATURE----- --Sig_/QRgxWOW3=LdfxDd168gPaIX-- --===============7289532601328665607== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic --===============7289532601328665607==--