From: Gerd Hoffmann <kraxel@redhat.com>
To: Pekka Paalanen <ppaalanen@gmail.com>
Cc: dri-devel@lists.freedesktop.org,
open list <linux-kernel@vger.kernel.org>,
amd-gfx@lists.freedesktop.org,
Daniel Vetter <daniel.vetter@intel.com>
Subject: Re: [RfC PATCH] drm: fourcc byteorder: brings header file comments in line with reality.
Date: Mon, 10 Apr 2017 16:17:27 +0200 [thread overview]
Message-ID: <1491833847.30990.77.camel@redhat.com> (raw)
In-Reply-To: <20170410161214.305f5daf@eldfell>
Hi,
> which software have you used as representative of "reality"?
ppc64 (big endian) virtual machine, running with qemu stdvga & bochs-drm
driver. Xorg with modesetting driver uses DRM_FORMAT_XRGB8888 (one and
only format supported by bochs-drm), and we have to interpret that in
bigendian byte order on the host side to get a correct display.
Didn't try wayland. Can do, but will take a while. Don't have a
wayland-capable guest install at hand, and installing one takes a while
because I don't have a physical pseries and emulation is slooooww.
> To solve that problem, we would like to know if anything existing would
> break for each possible solution, but no developers using BE have really
> turned up.
That is part of the problem.
And even ppc is moving to little endian these days ...
cheers,
Gerd
WARNING: multiple messages have this Message-ID (diff)
From: Gerd Hoffmann <kraxel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Pekka Paalanen <ppaalanen-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Daniel Vetter
<daniel.vetter-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
open list <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: Re: [RfC PATCH] drm: fourcc byteorder: brings header file comments in line with reality.
Date: Mon, 10 Apr 2017 16:17:27 +0200 [thread overview]
Message-ID: <1491833847.30990.77.camel@redhat.com> (raw)
In-Reply-To: <20170410161214.305f5daf@eldfell>
Hi,
> which software have you used as representative of "reality"?
ppc64 (big endian) virtual machine, running with qemu stdvga & bochs-drm
driver. Xorg with modesetting driver uses DRM_FORMAT_XRGB8888 (one and
only format supported by bochs-drm), and we have to interpret that in
bigendian byte order on the host side to get a correct display.
Didn't try wayland. Can do, but will take a while. Don't have a
wayland-capable guest install at hand, and installing one takes a while
because I don't have a physical pseries and emulation is slooooww.
> To solve that problem, we would like to know if anything existing would
> break for each possible solution, but no developers using BE have really
> turned up.
That is part of the problem.
And even ppc is moving to little endian these days ...
cheers,
Gerd
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amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
next prev parent reply other threads:[~2017-04-10 14:17 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-10 10:12 [RfC PATCH] drm: fourcc byteorder: brings header file comments in line with reality Gerd Hoffmann
2017-04-10 10:12 ` Gerd Hoffmann
2017-04-10 12:02 ` Daniel Vetter
2017-04-10 12:02 ` Daniel Vetter
2017-04-10 16:28 ` Alex Deucher
2017-04-10 16:28 ` Alex Deucher
2017-04-10 13:12 ` Pekka Paalanen
2017-04-10 13:12 ` Pekka Paalanen
2017-04-10 14:17 ` Gerd Hoffmann [this message]
2017-04-10 14:17 ` Gerd Hoffmann
2017-04-10 14:45 ` Ilia Mirkin
2017-04-10 14:45 ` Ilia Mirkin
2017-04-10 16:26 ` Alex Deucher
2017-04-10 16:26 ` Alex Deucher
2017-04-10 15:09 ` Pekka Paalanen
2017-04-10 15:09 ` Pekka Paalanen
2017-04-10 16:10 ` Ilia Mirkin
2017-04-10 16:10 ` Ilia Mirkin
2017-04-11 7:31 ` Pekka Paalanen
2017-04-11 7:31 ` Pekka Paalanen
2017-04-11 11:23 ` Gerd Hoffmann
2017-04-11 11:23 ` Gerd Hoffmann
2017-04-13 7:44 ` Pekka Paalanen
2017-04-13 7:44 ` Pekka Paalanen
2017-04-11 14:18 ` Ilia Mirkin
2017-04-11 14:18 ` Ilia Mirkin
2017-04-17 6:43 ` Ilia Mirkin
2017-04-18 2:53 ` Michel Dänzer
2017-04-18 2:53 ` Michel Dänzer
2017-04-18 5:04 ` Ilia Mirkin
2017-04-18 5:04 ` Ilia Mirkin
2017-04-18 5:58 ` Michel Dänzer
2017-04-18 5:58 ` Michel Dänzer
2017-04-18 10:14 ` Gerd Hoffmann
2017-04-18 10:14 ` Gerd Hoffmann
2017-04-19 1:01 ` Michel Dänzer
2017-04-19 1:01 ` Michel Dänzer
2017-04-19 3:19 ` Ilia Mirkin
2017-04-19 3:19 ` Ilia Mirkin
2017-04-19 3:28 ` Ilia Mirkin
2017-04-19 3:28 ` Ilia Mirkin
2017-04-19 7:09 ` Pekka Paalanen
2017-04-19 7:09 ` Pekka Paalanen
2017-04-19 12:34 ` Gerd Hoffmann
2017-04-19 12:34 ` Gerd Hoffmann
2017-04-18 10:00 ` Gerd Hoffmann
2017-04-18 10:00 ` Gerd Hoffmann
2017-04-18 11:18 ` Pekka Paalanen
2017-04-18 11:18 ` Pekka Paalanen
2017-04-18 13:39 ` Gerd Hoffmann
2017-04-18 13:39 ` Gerd Hoffmann
2017-04-18 14:01 ` Pekka Paalanen
2017-04-18 14:01 ` Pekka Paalanen
2017-04-18 20:50 ` Gerd Hoffmann
2017-04-18 20:50 ` Gerd Hoffmann
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