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Date: Thu, 18 Apr 2019 18:09:06 +0900 From: Tomasz Figa <tfiga@...omium.org> To: Paul Kocialkowski <paul.kocialkowski@...tlin.com> Cc: Daniel Vetter <daniel@...ll.ch>, Nicolas Dufresne <nicolas@...fresne.ca>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Alexandre Courbot <acourbot@...omium.org>, Maxime Ripard <maxime.ripard@...tlin.com>, Hans Verkuil <hverkuil@...all.nl>, Mauro Carvalho Chehab <mchehab@...nel.org>, Linux Media Mailing List <linux-media@...r.kernel.org>, dri-devel <dri-devel@...ts.freedesktop.org>, Thomas Petazzoni <thomas.petazzoni@...tlin.com>, Eric Anholt <eric@...olt.net>, Rob Clark <robdclark@...il.com>, Dave Airlie <airlied@...hat.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com> Subject: Re: Support for 2D engines/blitters in V4L2 and DRM On Thu, Apr 18, 2019 at 5:55 PM Paul Kocialkowski <paul.kocialkowski@...tlin.com> wrote: > > Hi Daniel, > > On Thu, 2019-04-18 at 10:18 +0200, Daniel Vetter wrote: > > On Wed, Apr 17, 2019 at 08:10:15PM +0200, Paul Kocialkowski wrote: > > > Hi Nicolas, > > > > > > I'm detaching this thread from our V4L2 stateless decoding spec since > > > it has drifted off and would certainly be interesting to DRM folks as > > > well! > > > > > > For context: I was initially talking about writing up support for the > > > Allwinner 2D engine as a DRM render driver, where I'd like to be able > > > to batch jobs that affect the same destination buffer to only signal > > > the out fence once when the batch is done. We have a similar issue in > > > v4l2 where we'd like the destination buffer for a set of requests (each > > > covering one H264 slice) to be marked as done once the set was decoded. > > > Out of curiosity, what area did you find a 2D blitter useful for? Best regards, Tomasz
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