On Wed, 8 Feb 2012 13:34:13 +0000, Chris Wilson <ch...@chris-wilson.co.uk> wrote: > This is a revert of 6aa56062eaba67adfb247cded244fd877329588d. > > This was originally introduced to workaround reads of the ringbuffer > registers returning 0 on SandyBridge causing hangs due to ringbuffer > overflow. The root cause here was reads through the GT powerwell require > the forcewake dance, something we only learnt of later. Now it appears > that reading the reported head position from the HWS is returning > garbage, leading once again to hangs.
Tested-by: Eric Anholt <e...@anholt.net> (on top of de67cba65944f26c0f147035bd62e30c5f456b96, this fixes rendering failures and GPU hangs on gen7).
pgpO2iMkbIRX9.pgp
Description: PGP signature
_______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
