linux-kernel - Re: [PATCH RESEND v9 1/2] drm/atomic: Let drivers decide which planes to async flip

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Message-Id: <D5EU0I3P38QA.NOC91EEFYWMG@kode54.net>
Date: Tue, 05 Nov 2024 21:04:14 -0800
From: "Christopher Snowhill" <chris@...e54.net>
To: "Dmitry Baryshkov" <dmitry.baryshkov@...aro.org>
Cc: André Almeida <andrealmeid@...lia.com>,
 <kernel-dev@...lia.com>, "Simon Ser" <contact@...rsion.fr>, "Thomas
 Zimmermann" <tzimmermann@...e.de>, <joshua@...ggi.es>,
 <ville.syrjala@...ux.intel.com>, "Daniel Stone" <daniel@...ishbar.org>,
 "Xaver Hugl" <xaver.hugl@...il.com>, "Harry Wentland"
 <harry.wentland@....com>, "Simona Vetter" <simona@...ll.ch>, "Alex Deucher"
 <alexander.deucher@....com>, "Maarten Lankhorst"
 <maarten.lankhorst@...ux.intel.com>, "Maxime Ripard" <mripard@...nel.org>,
 <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
 <amd-gfx@...ts.freedesktop.org>, "Leo Li" <sunpeng.li@....com>,
 Christian König <christian.koenig@....com>, "David Airlie"
 <airlied@...il.com>, "Rodrigo Siqueira" <Rodrigo.Siqueira@....com>, "Xinhui
 Pan" <Xinhui.Pan@....com>
Subject: Re: [PATCH RESEND v9 1/2] drm/atomic: Let drivers decide which
 planes to async flip

On Tue Nov 5, 2024 at 2:51 AM PST, Dmitry Baryshkov wrote:
> On Tue, 5 Nov 2024 at 10:15, Christopher Snowhill <chris@...e54.net> wrote:
> >
> > On Mon Nov 4, 2024 at 12:52 PM PST, André Almeida wrote:
> > > Hi Christopher,
> > >
> > > Em 03/11/2024 03:36, Christopher Snowhill escreveu:
> > > > On Fri Nov 1, 2024 at 11:23 AM PDT, André Almeida wrote:
> > > >> Currently, DRM atomic uAPI allows only primary planes to be flipped
> > > >> asynchronously. However, each driver might be able to perform async
> > > >> flips in other different plane types. To enable drivers to set their own
> > > >> restrictions on which type of plane they can or cannot flip, use the
> > > >> existing atomic_async_check() from struct drm_plane_helper_funcs to
> > > >> enhance this flexibility, thus allowing different plane types to be able
> > > >> to do async flips as well.
> > > >>
> > > >> In order to prevent regressions and such, we keep the current policy: we
> > > >> skip the driver check for the primary plane, because it is always
> > > >> allowed to do async flips on it.
> > > >>
> > > >> Signed-off-by: André Almeida <andrealmeid@...lia.com>
> > > >
> > > > Should I do a R-b too?
> > >
> > > If you can review the code, it's always really appreciated.
> >
> > I mean, I did review your changes, they looked good to me. I just didn't
> > know the protocol for reporting review in addition to testing.
>
> Please respond with the R-B tag. Also ideally the Tested-by should
> contain the reference to a platform which was used to test it.
>
> >
> > >
> > > > The changes looked sound enough for me to feel
> > > > like testing it as well. Tested Borderlands Game of the Year Enhanced on
> > > > my RX 7700 XT at maximum settings at 1080p165, and the tearing support in
> > > > labwc allowed it to reach over 700fps. No problems from the hardware
> > > > cursor.
> > >
> > > Thanks for testing and reporting!
> > >
> > > >
> > > > Tested-by: Christopher Snowhill <chris@...e54.net>
> > > >
> >

Reviewed-by: Christopher Snowhill <chris@...e54.net>
Tested-by: Christopher Snowhill <chris@...e54.net> on Radeon RX 7700 XT
using labwc-git

(I must admit, the documents do not make it clear what format the
Testing-by tag should take, or how to append which hardware it was
tested on, etc.)