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

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Sep 25 00:26:35 PDT 2014


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

--- Comment #17 from Christian König <deathsimple at vodafone.de> ---
(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.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20140925/2be8444d/attachment-0001.html>


More information about the dri-devel mailing list