On Mon, Mar 28, 2011 at 10:55:40AM -0700, Eric Anholt wrote:
> ---
> I suspect due to
> FORCEWAKE, which also means that I can't necessarily trust that the
> bit was unset originally), I got only hangs from 3D.

If you want to get some more possibly garbage data, you can set
forcewake from userspace, and hope the kernel doesn't unset it :).

intel_reg_write 0xa18c 1
# check for ack
intel_reg_read 0x130090

I've never tried it, but it might work at least for reading that first
bit. I'm currenty working around this with 
<1301105269-23970-1-git-send-email-...@bwidawsk.net>
and a hack in the kernel to do a get() and never do a put.

Ben
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