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Message-ID: <CAEdQ38FGQe_z2T2vUCsSYvH52WZc75OPCCFYOSEKJ9MzXq0ynw@mail.gmail.com>
Date: Mon, 27 Mar 2023 15:05:48 -0400
From: Matt Turner <mattst88@...il.com>
To: Rob Clark <robdclark@...il.com>
Cc: dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
intel-gfx@...ts.freedesktop.org,
Luben Tuikov <luben.tuikov@....com>,
Christian König <ckoenig.leichtzumerken@...il.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Bas Nieuwenhuizen <bas@...nieuwenhuizen.nl>,
Rob Clark <robdclark@...omium.org>,
Abhinav Kumar <quic_abhinavk@...cinc.com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Douglas Anderson <dianders@...omium.org>,
Gustavo Padovan <gustavo@...ovan.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
"moderated list:DMA BUFFER SHARING FRAMEWORK"
<linaro-mm-sig@...ts.linaro.org>,
"open list:DRM DRIVER FOR MSM ADRENO GPU"
<linux-arm-msm@...r.kernel.org>,
"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>,
"open list:DMA BUFFER SHARING FRAMEWORK"
<linux-media@...r.kernel.org>, Liu Shixin <liushixin2@...wei.com>,
Sean Paul <sean@...rly.run>,
Stephen Boyd <swboyd@...omium.org>,
Vinod Polimera <quic_vpolimer@...cinc.com>
Subject: Re: [PATCH v10 00/15] dma-fence: Deadline awareness
On Wed, Mar 8, 2023 at 10:53 AM Rob Clark <robdclark@...il.com> wrote:
>
> From: Rob Clark <robdclark@...omium.org>
>
> This series adds a deadline hint to fences, so realtime deadlines
> such as vblank can be communicated to the fence signaller for power/
> frequency management decisions.
>
> This is partially inspired by a trick i915 does, but implemented
> via dma-fence for a couple of reasons:
>
> 1) To continue to be able to use the atomic helpers
> 2) To support cases where display and gpu are different drivers
>
> This iteration adds a dma-fence ioctl to set a deadline (both to
> support igt-tests, and compositors which delay decisions about which
> client buffer to display), and a sw_sync ioctl to read back the
> deadline. IGT tests utilizing these can be found at:
I read through the series and didn't spot anything. Have a rather weak
Reviewed-by: Matt Turner <mattst88@...il.com>
Thanks!
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