[Bug 83708] [vdpau,uvd] kernel oops, Unable to handle kernel paging request at virtual address

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83708

--- Comment #18 from Jack <zduo006 at 163.com> ---
(In reply to comment #17)
> (In reply to comment #16)
> > (In reply to comment #15)
> > > 1. I do not add cpu_to_le32() first ,but when I trace the messages from
> > > printk,the value of msg_type is reversed.
> > 
> > That's in radeon_uvd_cs_msg()? Sounds like the Mesa UVD code writes the
> > messages in host byte order, not in little endian. Maybe Christian can
> > clarify which byte order should be used for them.
> 
> The hardware supports byte swapping for the message and feedback buffer, but
> I think always writing/reading it in little endian will be simpler to get
> working.
> 
> The userspace code currently doesn't supports big endian hosts and so will
> probably write it in the wrong byte order.

I think you are right. The patch I give it it's not the original point.So I
have some work to do on userspace, such as mesa. A huge project!
By the way, which version of mesa add big endian support.or you have some plans
to do it.

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