linux-kernel - Re: [PATCH] MAINTAINERS: Add Helge as fbdev maintainer

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Date:   Tue, 18 Jan 2022 15:23:41 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Gerd Hoffmann <kraxel@...hat.com>
Cc:     Helge Deller <deller@....de>, 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>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] MAINTAINERS: Add Helge as fbdev maintainer

Hi

Am 18.01.22 um 09:10 schrieb Geert Uytterhoeven:
> Hi Gerd,
> 
> On Tue, Jan 18, 2022 at 7:30 AM Gerd Hoffmann <kraxel@...hat.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...

What I still don't understand: why are you so keen on maintaining an 
interface that only serves the console? Nothing else uses fbdev these 
days. Why not improve DRM/userspace to the point where it fits your 
requirements? Long-term, the latter would make a lot more sense.

Best regards
Thomas

> 
> Gr{oetje,eeting}s,
> 
>                          Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-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

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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