From: Chris Wilson <chris@chris-wilson.co.uk>
To: Sriram <sri.kmb@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: [drm:init_ring_common] *ERROR* render ring head not reset to zero
Date: Sun, 05 Dec 2010 21:43:02 +0000 [thread overview]
Message-ID: <b9dded$h9rt4c@orsmga002.jf.intel.com> (raw)
In-Reply-To: <loom.20101205T072655-971@post.gmane.org>
On Sun, 5 Dec 2010 06:28:25 +0000 (UTC), Sriram <sri.kmb@gmail.com> wrote:
> Please explain what this error means & why it is happening...
We wrote a zero into the register (whilst the ring is completely idle,
supposedly anyway) and read back a non-zero value. We believe the silicon
is doing evil things, we workaround it by writing the value again, and
continue on our merry way.
The dance only gets more complex as the hardware evolves.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
prev parent reply other threads:[~2010-12-05 21:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-04 20:31 [drm:init_ring_common] *ERROR* render ring head not reset to zero Thomas Meyer
2010-10-04 20:46 ` Chris Wilson
2010-12-05 6:28 ` Sriram
2010-12-05 21:43 ` Chris Wilson [this message]
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