linux-kernel - Re: UDL's fbdev doesn't work for user-space apps

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Message-ID: <20171209172022.GC19862@localhost>
Date:   Sat, 9 Dec 2017 18:20:22 +0100
From:   Pavel Machek <pavel@....cz>
To:     Jose Abreu <Jose.Abreu@...opsys.com>
Cc:     Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        "airlied@...il.com" <airlied@...il.com>,
        "tutankhamen@...omium.org" <tutankhamen@...omium.org>,
        "daniel.vetter@...ll.ch" <daniel.vetter@...ll.ch>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "airlied@...hat.com" <airlied@...hat.com>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>,
        "hshi@...omium.org" <hshi@...omium.org>
Subject: Re: UDL's fbdev doesn't work for user-space apps

On Mon 2017-12-04 11:50:40, Jose Abreu wrote:
> Hi Alexey,
> 
> On 04-12-2017 11:32, Alexey Brodkin wrote:
> > My first [probably incorrect] assumption is Xserver requires fbdev (/dev/fbX)
> > and it cannot use DRI video card natively. Is that correct?
> >
> >
> 
> Xserver can use DRI directly, you need to enable modesetting
> driver in Xorg config or use the designated driver for your card
> (if there is any).

Still, dev/fb1 should work. Can be tested using dd, even :-)

Best regards,
									Pavel
> 
> e.g.:
> 
> Section "Device"
>         Identifier "Card0"
>         Driver "modesetting"
>         Option "kmsdev" "/dev/dri/card0"
>         Option "SWcursor" "true"
>         BusID "PCI:X:X:X"
> EndSection
> 
> Best Regards,
> Jose Miguel Abreu

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html