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Date: Fri, 01 Oct 2010 18:20:41 +0200 From: Michel Dänzer <michel@...nzer.net> To: Benjamin Herrenschmidt <benh@...nel.crashing.org> Cc: Josh Boyer <jwboyer@...il.com>, linuxppc-dev@...ts.ozlabs.org, paulus@...ba.org, linux-kernel@...r.kernel.org, Ian Munsie <imunsie@....ibm.com> Subject: Re: Introduce support for little endian PowerPC On Fre, 2010-10-01 at 22:14 +1000, Benjamin Herrenschmidt wrote: > > Now, the main reasons in practice are anything touching graphics. > > There's quite a few IP cores out there for SoCs that don't have HW > swappers, and -tons- of more or less ugly code that can't deal with non > native pixel ordering (hell, even Xorg isn't good at it, we really only > support cards that have HW swappers today). That's not true. Even the radeon driver doesn't really need the HW swappers anymore with KMS. > There's an even bigger pile of application code that deals with graphics > without any regard for endianness and is essentially unfixable. Out of curiosity, what kind of APIs are those apps using? X11 and OpenGL have well-defined semantics wrt endianness, allowing the drivers to handle any necessary byte swapping internally, and IME the vast majority of apps handle this correctly. -- Earthling Michel Dänzer | http://www.vmware.com Libre software enthusiast | Debian, X and DRI developer -- 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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