[coreboot-gerrit] Change in coreboot[master]: nb/intel/sandybridge/gma.c: Correct deasserting force wake on IVB

[Evgeny Zinoviev (Code Review)]

Evgeny Zinoviev has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/42455 )

Change subject: nb/intel/sandybridge/gma.c: Correct deasserting force wake on IVB
......................................................................

nb/intel/sandybridge/gma.c: Correct deasserting force wake on IVB

Change-Id: I31f8cddb9408d0c23c558b51f5d1f8787f0b700f
Signed-off-by: Evgeny Zinoviev 
---
M src/northbridge/intel/sandybridge/gma.c
1 file changed, 2 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/55/42455/1

diff --git a/src/northbridge/intel/sandybridge/gma.c b/src/northbridge/intel/sandybridge/gma.c
index f9f318c..3e8d0de 100644
--- a/src/northbridge/intel/sandybridge/gma.c
+++ b/src/northbridge/intel/sandybridge/gma.c
@@ -510,7 +510,8 @@
    	gtt_write(0xa18c, gtt_read(0xa18c) & ~1);
    	gtt_poll(0x130090, (1 << 0), (0 << 0));
    } else {
-		gtt_write(0xa188, 0x1fffe);
+		gtt_write(0xa188, gtt_read(0xa188) & 0x1ffff);
+		gtt_write(0xa188, gtt_read(0xa188) & ~1);
    	if (gtt_poll(0x130040, (1 << 0), (0 << 0)))
    		gtt_write(0xa188, gtt_read(0xa188) | 1);
    }