Fixes to enable RC6 on IvyBridge

- The unneeded poll on non-MT force-wake bit was timing out
and causing the gma_pm_init_pre_vbios() function to exit
early so it was not preparing PM registers properly.
I changed the gtt_poll() calls to not return on timeout
unless it can't proceed so we don't see half-initialized
registers.

- RC6+ (Deep Render Standby) is not working reliably so we
can just enable RC6 in the BIOS and let the kernel decide
if it wants to enable RC6+ later.

This Kernel message is new in kernel 3.4:
[drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off

Change-Id: I69d005ba56be8c7684a4ea1133a1d761f7c07acc
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1268
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

0 files changed, 0 insertions, 0 deletions