From: "Arnd Bergmann" <arnd@arndb.de>
To: "Thomas Zimmermann" <tzimmermann@suse.de>,
"Javier Martinez Canillas" <javierm@redhat.com>,
"David Airlie" <airlied@linux.ie>,
"Daniel Vetter" <daniel@ffwll.ch>, "Helge Deller" <deller@gmx.de>,
maxime@cerno.tech, sam@ravnborg.org,
"Michal Suchanek" <msuchanek@suse.de>,
"Michael Ellerman" <mpe@ellerman.id.au>,
benh@kernel.crashing.org, "Paul Mackerras" <paulus@samba.org>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
mark.cave-ayland@ilande.co.uk
Cc: linux-fbdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
dri-devel@lists.freedesktop.org
Subject: Re: [PATCH v4 5/5] drm/ofdrm: Support big-endian scanout buffers
Date: Wed, 12 Oct 2022 09:44:39 +0200 [thread overview]
Message-ID: <f26ca6a1-feb1-4822-ac96-bc484b22f8a0@app.fastmail.com> (raw)
In-Reply-To: <866c7033-0d4e-7b5d-008c-8eb16f99498b@suse.de>
On Wed, Oct 12, 2022, at 9:40 AM, Thomas Zimmermann wrote:
> Am 12.10.22 um 09:17 schrieb Arnd Bergmann:
>> On Wed, Oct 12, 2022, at 8:46 AM, Thomas Zimmermann wrote:
>
>> Does qemu mark the device has having a particular endianess then, or
>> does it switch the layout of the framebuffer to match what the CPU
>> does?
>
> The latter. On neither architecture does qemu expose this flag. The
> default endianess corresponds to the host.
"host" as in the machine that qemu runs on, or the machine that is
being emulated? I suppose it would be broken either way, but in the
latter case, we could get away with detecting that the machine is
running under qemu.
Arnd
next prev parent reply other threads:[~2022-10-12 7:45 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-28 10:50 [PATCH v4 0/5] drm: Add driver for PowerPC OF displays Thomas Zimmermann
2022-09-28 10:50 ` [PATCH v4 1/5] drm/ofdrm: Add ofdrm for Open Firmware framebuffers Thomas Zimmermann
2022-09-28 10:50 ` [PATCH v4 2/5] drm/ofdrm: Add CRTC state Thomas Zimmermann
2022-09-28 10:50 ` [PATCH v4 3/5] drm/ofdrm: Add per-model device function Thomas Zimmermann
2022-09-28 10:50 ` [PATCH v4 4/5] drm/ofdrm: Support color management Thomas Zimmermann
2022-09-28 10:50 ` [PATCH v4 5/5] drm/ofdrm: Support big-endian scanout buffers Thomas Zimmermann
2022-09-28 11:12 ` Michal Suchánek
2022-09-28 11:30 ` Thomas Zimmermann
2022-10-11 7:46 ` Javier Martinez Canillas
2022-10-11 11:30 ` Thomas Zimmermann
2022-10-11 20:06 ` Arnd Bergmann
2022-10-11 21:38 ` Michal Suchánek
2022-10-12 6:46 ` Thomas Zimmermann
2022-10-12 7:17 ` Arnd Bergmann
2022-10-12 7:40 ` Thomas Zimmermann
2022-10-12 7:44 ` Arnd Bergmann [this message]
2022-10-12 8:27 ` Thomas Zimmermann
2022-10-12 8:38 ` Arnd Bergmann
2022-10-12 12:00 ` Thomas Zimmermann
2022-10-12 13:12 ` Arnd Bergmann
2022-10-12 14:27 ` Michal Suchánek
2022-10-13 7:39 ` Javier Martinez Canillas
2022-10-17 6:44 ` Benjamin Herrenschmidt
2022-10-12 14:31 ` Thomas Zimmermann
2022-10-12 14:59 ` Ville Syrjälä
2022-10-12 16:01 ` Michal Suchánek
2022-10-12 12:07 ` Michal Suchánek
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