<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Corruption with DMA ring on cayman"
href="https://bugs.freedesktop.org/show_bug.cgi?id=60802#c65">Comment # 65</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Corruption with DMA ring on cayman"
href="https://bugs.freedesktop.org/show_bug.cgi?id=60802">bug 60802</a>
from <span class="vcard"><a class="email" href="mailto:agd5f@yahoo.com" title="Alex Deucher <agd5f@yahoo.com>"> <span class="fn">Alex Deucher</span></a>
</span></b>
<pre>After a little more investigation this weekend, I think I found the root cause.
On cayman, 128bpp surfaces require non_disp ordering for hw access to both
linear and tiled surfaces. When we use the 3D engine we can set the non_disp
ordering on both the tiled and linear sides (via CB or texture), but when we
use the DMA engine, we can only set the non_disp ordering on the tiled side, so
after a L2T operation with the DMA engine, the data ends up in the wrong order
on the tiled side.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>