Byte order in sound drivers

[Benjamin Herrenschmidt]

>It depends on the HW you have. Most recent machines don't do HW
>byteswap, and so accept only big-endian samples. The way this is
>implemented in our driver currently is a bit weird though, the
>setformat ioctl won't fail when trying to set an LE format, but
>it will set the equivalent BE format. So the application is
>expected to read back the format to figure out what had to be
>done.

Well, the current dmasound behaviour is definitely broken. I'm
changing it now so that when asked for an _LE format on a chip
that do only _BE will return -EINVAL.

Ben.


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