Re: [Linux-fbdev-devel] [PATCH 1/2] fb: add support for foreign endianness

Clemens Koller
2008-02-20T15:44:41Z

Paul Mackerras schrieb:
> Andrew Morton writes:
>
>> Bizarrely, the original author of the patch (Anton) has fallen off the cc.
>> Could whoever did that please thwap himself?
>>
>> Anyway, my head is now officially spinning. Did anyone actually have a
>> reason why we shouldn't proceed with Anton's patch?
>
> I was wondering if it would be sufficient to provide alternative
> versions of fb_readl, fb_writel etc. that do byte-swapping. That
> would mean that all framebuffers would have to have the same
> endianness, but that would suffice for embedded systems such as
> Anton's and would end up a lot simpler IMHO.

Yes. At least the affected PowerPC platforms can do byte-swapping on
the fly, so this should be sufficient and without performance
penalty, AFAICS.

Regards,

Clemens