Vladimir Serbinenko (phcoder@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4618
-gerrit
commit 2be53f362139f8f3abd45070038c6cc4395de848 Author: Vladimir Serbinenko phcoder@gmail.com Date: Sun Jan 5 06:52:11 2014 +0100
sandybridge/igd: Add brightness register descriptions
Needed for brightness control for Lenovo X230
Change-Id: Ib6d127d2e050671dd402c31af06ff4726f65156c Signed-off-by: Vladimir Serbinenko phcoder@gmail.com --- src/northbridge/intel/sandybridge/acpi/igd.asl | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/src/northbridge/intel/sandybridge/acpi/igd.asl b/src/northbridge/intel/sandybridge/acpi/igd.asl index a6804ad..02eff2e 100644 --- a/src/northbridge/intel/sandybridge/acpi/igd.asl +++ b/src/northbridge/intel/sandybridge/acpi/igd.asl @@ -23,6 +23,23 @@ Device (GFX0) { Name (_ADR, 0x00020000)
+ OperationRegion (GFXC, PCI_Config, 0x00, 0x0100) + Field (GFXC, DWordAcc, NoLock, Preserve) + { + Offset (0x10), + BAR0, 64 + } + + OperationRegion (GFRG, SystemMemory, And (BAR0, 0xfffffffffffffff0), 0x400000) + Field (GFRG, DWordAcc, NoLock, Preserve) + { + Offset (0x48254), + BCLV, 16, + Offset (0xc8250), + CR1, 32, + CR2, 32 + } + /* Display Output Switching */ Method (_DOS, 1) {