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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Tue, 18 Jan 2022 09:10:29 +0100
Message-ID: <CAMuHMdWXWA2h7zrZa_nnqR_qNdsOdHJS=Vf1YExhvs08KukoNg@mail.gmail.com>
Subject: Re: [PATCH] MAINTAINERS: Add Helge as fbdev maintainer
To:     Gerd Hoffmann <kraxel@redhat.com>
Cc:     Helge Deller <deller@gmx.de>, Daniel Vetter <daniel@ffwll.ch>,
        Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
        Sven Schnelle <svens@stackframe.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        DRI Development <dri-devel@lists.freedesktop.org>,
        Javier Martinez Canillas <javierm@redhat.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Linus Torvalds <torvalds@linux-foundation.org>
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Hi Gerd,

On Tue, Jan 18, 2022 at 7:30 AM Gerd Hoffmann <kraxel@redhat.com> wrote:
> 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.

Assuming accesses to the shadow frame buffer are faster than accesses
to the scanout frame buffer. While this is true on modern hardware,
this is not the case on all hardware.  Especially if the shadow frame
buffer has a higher depth (XRGB8888) than the scanout frame buffer
(e.g. Cn)...

The funny thing is that the systems we are interested in, once used
to be known for their graphics capabilities and/or performance...

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds