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: <20220118062947.6kfuam6ah63z5mmn@sirius.home.kraxel.org>
Date:   Tue, 18 Jan 2022 07:29:47 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     Helge Deller <deller@....de>
Cc:     Daniel Vetter <daniel@...ll.ch>,
        Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
        Sven Schnelle <svens@...ckframe.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] MAINTAINERS: Add Helge as fbdev maintainer

  Hi,

> Please correct me if I'm wrong, but text-console emulation/scrolling on DRM is
> currently unaccelerated and bound to Truecolour modes only,

Yes.  Adding support for formats beside argb8888 to the drm fbcon
emulation shouldn't be that much of a problem though.

Acceleration is harder.  The scroll acceleration had issues nobody
addressed for years, and on modern hardware it is simply not used, which
is probably the reason nobody stepped up fixing things and it ended up
being dropped.  Bringing it back is much more work than just reverting
the commits removing it.

Also note that using a shadow framebuffer allows to decouple fbcon
updates and scanout framebuffer updates.  Can be used to speed up
things without depending on the 2d blitter.

take care,
  Gerd

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ