linux-kernel - Re: [PATCH 02/10] drm/sun4i: Disable YUV channel when using the frontend and set interlace

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180327081731.he3lhnvqffuimsi5@flea>
Date:   Tue, 27 Mar 2018 10:17:31 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Sean Paul <seanpaul@...omium.org>
Subject: Re: [PATCH 02/10] drm/sun4i: Disable YUV channel when using the
 frontend and set interlace

On Tue, Mar 27, 2018 at 10:00:43AM +0200, Paul Kocialkowski wrote:
> Hi,
> 
> On Fri, 2018-03-23 at 10:55 +0100, Maxime Ripard wrote:
> > On Wed, Mar 21, 2018 at 04:28:56PM +0100, Paul Kocialkowski wrote:
> > > The YUV channel was only disabled in
> > > sun4i_backend_update_layer_formats,
> > > which is not called when the frontend is selected.
> > > 
> > > Thus, creating a layer with a YUV format handled by the backend and
> > > then
> > > switching to a format that requires the frontend would keep the YUV
> > > channel enabled for the layer.
> > > 
> > > This explicitly disables the YUV channel for the layer when using
> > > the
> > > frontend as well. It also sets the relevant interlace bit, which was
> > > missing in the frontend path as well.
> > 
> > This should be part of a separate patch. Usually, if you write "it
> > also does..." at the end of your commit log, it's a pretty good
> > indication that it should be another patch :)
> 
> I must say, I figured that this part was missing in the frontend path by
> chance and couldn't really test the feature, so I'm also tempted to drop
> it altogether. What do you think?

If you haven't been able to test it, then yeah, don't submit it.

> Also, is interlacing actually used on any of the video outputs we
> support? Perhaps RGB?

Composite would be a better guess :)

Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)