linux-kernel - Re: console / fbdev: fbcon support for bits_per

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Message-ID: <CAMuHMdXMWFXG99iiuk1j=0DaQbWbmcpGxaTfDNX8o+Dz7MH7aw@mail.gmail.com>
Date:	Sun, 15 Jun 2014 10:57:48 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Bruno Prémont <bonbons@...ux-vserver.org>
Cc:	Stefan Biereigel <stefan@...reigel.de>,
	Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-console@...r.kernel.org, brian <brian.fonfara@....de>
Subject: Re: console / fbdev: fbcon support for bits_per_pixel = 1?

On Sat, Jun 14, 2014 at 2:35 PM, Bruno Prémont
<bonbons@...ux-vserver.org> wrote:
>> Is this behavior intended or are we triggering a bug here (that no one noticed, because
>> who in the world uses monochrome framebuffers these days..). I can't see any comments that
>> monochrome consoles should not work with 1 bit per pixel. See the code below if you spot
>> some errors (ignore some missing error handling and mediocre style for now, please).
>
> fbcon on 1bpp frambuffer worked for me with picoLCD (though I have found no userspace

I'm not aware of 1 bpp frame buffer consoles being broken.

> framebuffer application willing to operate at 1bpp).

Xfbdev does. I revived support for monochrome (and Atari/Amiga-style
bitplanes) last year.

And of course
https://git.kernel.org/cgit/linux/kernel/git/geert/fbtest.git/

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
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