[coreboot-gerrit] Patch set updated for coreboot: nb/intel/gm45/igd: Hide IGD while disabling

[Patrick Rudolph (siro@das-labor.org)]

Patrick Rudolph (siro at das-labor.org) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/18194

-gerrit

commit 6608f52a89001a82293a37af051d0fa5ff608ce4
Author: Patrick Rudolph <siro at das-labor.org>
Date:   Sat Jan 21 10:43:52 2017 +0100

    nb/intel/gm45/igd: Hide IGD while disabling
    
    Hide the IGD to make sure ramstage doesn't detect it.
    
    Change-Id: If389016f3bb0c4c2fd0b826914997a87a9137201
    Signed-off-by: Patrick Rudolph <siro at das-labor.org>
---
 src/northbridge/intel/gm45/igd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/northbridge/intel/gm45/igd.c b/src/northbridge/intel/gm45/igd.c
index 74572ca..1164339 100644
--- a/src/northbridge/intel/gm45/igd.c
+++ b/src/northbridge/intel/gm45/igd.c
@@ -127,6 +127,11 @@ static void disable_igd(const sysinfo_t *const sysinfo)
 		MCHBAR16(0x119e) = (MCHBAR16(0x119e) & ~(7 << 13)) | (4 << 13);
 		MCHBAR16(0x119e) |= (1 << 12);
 	}
+
+	/* Hide IGD. */
+	u32 deven = pci_read_config32(mch_dev, D0F0_DEVEN);
+	deven &= ~(3 << 3);
+	pci_write_config32(mch_dev, D0F0_DEVEN, deven);
 }
 
 void init_igd(const sysinfo_t *const sysinfo)