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

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Message-Id: <D5E5ZXW1K0A7.1VT1XCR1HIEST@kode54.net>
Date: Tue, 05 Nov 2024 02:15:03 -0800
From: "Christopher Snowhill" <chris@...e54.net>
To: André Almeida <andrealmeid@...lia.com>
Cc: <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>, <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH RESEND v9 1/2] drm/atomic: Let drivers decide which
 planes to async flip

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.

>
> > 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>
> >