linux-kernel - Re: [RfC PATCH] drm: fourcc byteorder: brings header file comments in line with reality.

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Date:   Tue, 11 Apr 2017 10:31:01 +0300
From:   Pekka Paalanen <ppaalanen@...il.com>
To:     Ilia Mirkin <imirkin@...m.mit.edu>
Cc:     Gerd Hoffmann <kraxel@...hat.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        open list <linux-kernel@...r.kernel.org>,
        amd-gfx@...ts.freedesktop.org,
        Daniel Vetter <daniel.vetter@...el.com>
Subject: Re: [RfC PATCH] drm: fourcc byteorder: brings header file comments
 in line with reality.

On Mon, 10 Apr 2017 12:10:14 -0400
Ilia Mirkin <imirkin@...m.mit.edu> wrote:

> On Mon, Apr 10, 2017 at 11:09 AM, Pekka Paalanen <ppaalanen@...il.com> wrote:

> > I also wonder if a real BE machine could have different results than
> > the virtual machine.  
> 
> I have a PPC G5 with an AGP GeForce FX 5200 that I can test things on,
> if necessary. (I got it specifically for this purpose, as the people
> who use this type of hw daily tend to perform updates rarely... in no
> small part due to the fact that updates tend to break the HW.)
> 
> Just let know what you need tested, I should be able to turn it around
> within a couple of days.

That's part of my problem. I don't really know what should be tested.
What do people do with their BE machines that we should avoid breaking?

I suppose correlating with what Gerd was testing would be nice, i.e.
does X.org with modesetting look right with and without GLAMOR? Maybe
you also want to throw in xf86-video-nouveau for comparison.

As to what apps to test those with... Gerd? I presume anything that does
*not* use OpenGL, since we have doubts of Mesa's correctness on BE,
right? So maybe some of the traditional ancient X11 apps? xterm with
colours?

However, I totally agree with Alex that someone with a BE machine
should review the whole stack before we could be confident with anything.

Thanks,
pq

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