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Date: Tue, 19 Feb 2008 00:35:08 +0100 From: Clemens Koller <clemens.koller@...gramm.de> To: linux-fbdev-devel@...ts.sourceforge.net CC: Krzysztof Helt <krzysztof.h1@...zta.fm>, adaplas@...il.com, linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org, Geert Uytterhoeven <geert@...ux-m68k.org>, Andrew Morton <akpm@...ux-foundation.org>, avorontsov@...mvista.com Subject: Re: [Linux-fbdev-devel] [PATCH 1/2] fb: add support for foreign endianness Valdis.Kletnieks@...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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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