From: Clemens Koller <clemens.koller@anagramm.de>
To: linux-fbdev-devel@lists.sourceforge.net
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>,
adaplas@gmail.com, linux-kernel@vger.kernel.org,
linuxppc-dev@ozlabs.org,
Geert Uytterhoeven <geert@linux-m68k.org>,
Andrew Morton <akpm@linux-foundation.org>,
avorontsov@ru.mvista.com
Subject: Re: [Linux-fbdev-devel] [PATCH 1/2] fb: add support for foreign endianness
Date: Tue, 19 Feb 2008 00:35:08 +0100 [thread overview]
Message-ID: <47BA162C.5000807@anagramm.de> (raw)
In-Reply-To: <19805.1203355811@turing-police.cc.vt.edu>
Valdis.Kletnieks@vt.edu schrieb:
> On Mon, 18 Feb 2008 08:18:47 +0100, Krzysztof Helt said:
>> I know two fb drivers which use endianess information (pm2fb and s3c2410fb).
>> Both resolve endianess at driver level. Actually, both handle it by setting special
>> bits so the graphics chip itself reorder bytes to transform foreign endianess.
>> I understand that this patch is for chips which cannot reorder bytes by themselves.
>
> Does anybody know of such a chip that's actually available in the wild? Or are
> we writing drivers for speculative possible chips?
>
I had troubles with the Silicon Motion SM501/SM502 endianess on PowerPC PCI vs. LocalBus.
The chip also has a register to swap endianess, but that seems to only affect some
LocalBus modes.
The current fb and X drivers are working, but when it comes to font
aliasing and hw-acceleration, the problems start to rise again...
Regards,
Clemens
WARNING: multiple messages have this Message-ID (diff)
From: Clemens Koller <clemens.koller@anagramm.de>
To: linux-fbdev-devel@lists.sourceforge.net
Cc: adaplas@gmail.com, Krzysztof Helt <krzysztof.h1@poczta.fm>,
linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org,
Geert Uytterhoeven <geert@linux-m68k.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [Linux-fbdev-devel] [PATCH 1/2] fb: add support for foreign endianness
Date: Tue, 19 Feb 2008 00:35:08 +0100 [thread overview]
Message-ID: <47BA162C.5000807@anagramm.de> (raw)
In-Reply-To: <19805.1203355811@turing-police.cc.vt.edu>
Valdis.Kletnieks@vt.edu schrieb:
> On Mon, 18 Feb 2008 08:18:47 +0100, Krzysztof Helt said:
>> I know two fb drivers which use endianess information (pm2fb and s3c2410fb).
>> Both resolve endianess at driver level. Actually, both handle it by setting special
>> bits so the graphics chip itself reorder bytes to transform foreign endianess.
>> I understand that this patch is for chips which cannot reorder bytes by themselves.
>
> Does anybody know of such a chip that's actually available in the wild? Or are
> we writing drivers for speculative possible chips?
>
I had troubles with the Silicon Motion SM501/SM502 endianess on PowerPC PCI vs. LocalBus.
The chip also has a register to swap endianess, but that seems to only affect some
LocalBus modes.
The current fb and X drivers are working, but when it comes to font
aliasing and hw-acceleration, the problems start to rise again...
Regards,
Clemens
next prev parent reply other threads:[~2008-02-18 23:35 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-05 15:44 [PATCH 1/2] fb: add support for foreign endianness Anton Vorontsov
2008-02-05 19:07 ` Anton Vorontsov
2008-02-15 6:49 ` Andrew Morton
2008-02-15 6:49 ` Andrew Morton
2008-02-15 6:49 ` Andrew Morton
2008-02-15 16:45 ` Anton Vorontsov
2008-02-15 16:45 ` Anton Vorontsov
2008-02-17 9:44 ` Geert Uytterhoeven
2008-02-17 9:44 ` [Linux-fbdev-devel] " Geert Uytterhoeven
2008-02-17 9:44 ` Geert Uytterhoeven
2008-02-18 7:18 ` Krzysztof Helt
2008-02-18 7:18 ` [Linux-fbdev-devel] " Krzysztof Helt
2008-02-18 7:18 ` Krzysztof Helt
2008-02-18 17:30 ` Valdis.Kletnieks
2008-02-18 17:30 ` [Linux-fbdev-devel] " Valdis.Kletnieks
2008-02-18 17:30 ` Valdis.Kletnieks
2008-02-18 17:37 ` Anton Vorontsov
2008-02-18 17:37 ` [Linux-fbdev-devel] " Anton Vorontsov
2008-02-18 17:37 ` Anton Vorontsov
2008-02-18 23:35 ` Clemens Koller [this message]
2008-02-18 23:35 ` Clemens Koller
2008-02-19 0:35 ` Benjamin Herrenschmidt
2008-02-19 0:35 ` [Linux-fbdev-devel] " Benjamin Herrenschmidt
2008-02-19 11:27 ` Clemens Koller
2008-02-19 12:05 ` Andrew Morton
2008-02-19 12:05 ` [Linux-fbdev-devel] " Andrew Morton
2008-02-19 12:05 ` Andrew Morton
2008-02-19 12:22 ` Clemens Koller
2008-02-19 12:22 ` Clemens Koller
2008-02-20 0:47 ` Valdis.Kletnieks
2008-02-20 0:47 ` Valdis.Kletnieks
2008-02-20 0:50 ` Benjamin Herrenschmidt
2008-02-20 0:50 ` Benjamin Herrenschmidt
2008-02-20 0:56 ` Paul Mackerras
2008-02-20 0:56 ` Paul Mackerras
2008-02-20 12:18 ` Anton Vorontsov
2008-02-20 12:18 ` Anton Vorontsov
2008-02-20 20:38 ` Benjamin Herrenschmidt
2008-02-20 20:38 ` Benjamin Herrenschmidt
2008-02-21 4:59 ` Paul Mackerras
2008-02-21 4:59 ` Paul Mackerras
2008-02-20 15:43 ` Clemens Koller
2008-02-20 15:43 ` [Linux-fbdev-devel] " Clemens Koller
2008-02-20 15:43 ` Clemens Koller
2008-02-16 11:49 ` Benjamin Herrenschmidt
2008-02-16 11:49 ` Benjamin Herrenschmidt
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