[coreboot-gerrit] New patch to review for coreboot: f39f5d6 gm45: fix uneven backlight (native gfx init)

Francis Rowe (info@gluglug.org.uk) gerrit at coreboot.org
Mon Dec 29 22:05:04 CET 2014


Francis Rowe (info at gluglug.org.uk) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/7979

-gerrit

commit f39f5d6928824e59d1980a4d67fec0fad7825929
Author: Francis Rowe <info at gluglug.org.uk>
Date:   Mon Dec 29 21:02:48 2014 +0000

    gm45: fix uneven backlight (native gfx init)
    
    When setting brightness levels low, backlight becomes uneven.
    This patch fixes that.
    
    Tested on X200.
    
    Change-Id: Ie71bf696ba4431ab25076f92dd5fdc9fdc167b09
    Signed-off-by: Francis Rowe <info at gluglug.org.uk>
---
 src/northbridge/intel/gm45/acpi/igd.asl | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/northbridge/intel/gm45/acpi/igd.asl b/src/northbridge/intel/gm45/acpi/igd.asl
index 199765b..6f0eb8c 100644
--- a/src/northbridge/intel/gm45/acpi/igd.asl
+++ b/src/northbridge/intel/gm45/acpi/igd.asl
@@ -206,14 +206,14 @@ Device (GFX0)
 
 		Method (_BCM, 1, NotSerialized)
 		{
-			Store (ShiftLeft (Arg0, 4), ^^BCLV)
+			Store (ShiftLeft (Arg0, 8), ^^BCLV)
 			Store (0x80000000, ^^CR1)
-			Store (0x0610, ^^BCLM)
+			Store (ShiftLeft (0x61, 8), ^^BCLM)
 		}
 		Method (_BQC, 0, NotSerialized)
 		{
 			Store (^^BCLV, Local0)
-			ShiftRight (Local0, 4, Local0)
+			ShiftRight (Local0, 8, Local0)
 			Return (Local0)
 		}
 



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