[coreboot] New patch to review for coreboot: 0ac2aac Save and restore F15TN graphics command register

[Martin Roth (martin.roth@se-eng.com)]

Martin Roth (martin.roth at se-eng.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2172

-gerrit

commit 0ac2aacddc1b82637335c85960c46dd99723b779
Author: Martin Roth <martin.roth at se-eng.com>
Date:   Tue Jan 15 13:17:30 2013 -0700

    Save and restore F15TN graphics command register
    
    In the AGESA routine GfxInitSview() called in the S3save path,
    the IO Space bit was getting cleared from the command register.
    This kept seabios from initializing the video bios.  If the vbios
    was loaded by coreboot, this routine was skipped, allowing seabios
    to initialize vbios as well.  I have modified the routine to save
    and restore the command register instead of clearing the IO Space
    bit.
    
    Change-Id: I756b0606adbc47da96780308c911852e39f547c7
    Signed-off-by: Martin Roth <martin.roth at se-eng.com>
---
 src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbSview/GnbSview.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbSview/GnbSview.c b/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbSview/GnbSview.c
index bb0a47c..0059519 100644
--- a/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbSview/GnbSview.c
+++ b/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbSview/GnbSview.c
@@ -126,6 +126,7 @@ GfxInitSview (
   AGESA_STATUS          Status;
   AGESA_STATUS          AgesaStatus;
   GFX_PLATFORM_CONFIG   *Gfx;
+  UINT32                OriginalCmdReg;
   IDS_HDT_CONSOLE (GNB_TRACE, "GfxInitSview Enter\n");
   AgesaStatus = AGESA_SUCCESS;
   Status =  GfxLocateConfigData (StdHeader, &Gfx);
@@ -138,6 +139,7 @@ GfxInitSview (
         VbiosImageInfo.ImagePtr = NULL;
         VbiosImageInfo.GfxPciAddress = Gfx->GfxPciAddress;
         VbiosImageInfo.Flags = GFX_VBIOS_IMAGE_FLAG_SPECIAL_POST;
+        GnbLibPciRead (Gfx->GfxPciAddress.AddressValue | 0x4, AccessS3SaveWidth8, &OriginalCmdReg, StdHeader);
         GnbLibPciRMW (Gfx->GfxPciAddress.AddressValue | 0x4, AccessS3SaveWidth8, 0xff, BIT1 | BIT2 | BIT0, StdHeader);
         Status = AgesaGetVbiosImage (0, &VbiosImageInfo);
         if (Status == AGESA_SUCCESS && VbiosImageInfo.ImagePtr != NULL) {
@@ -146,7 +148,7 @@ GfxInitSview (
           GfxFmDisableController (StdHeader);
           AgesaStatus = AGESA_ERROR;
         }
-        GnbLibPciRMW (Gfx->GfxPciAddress.AddressValue | 0x4, AccessS3SaveWidth8, 0xf8, BIT1 | BIT2, StdHeader);
+        GnbLibPciRMW (Gfx->GfxPciAddress.AddressValue | 0x4, AccessS3SaveWidth8, 0x00, OriginalCmdReg, StdHeader);
       }
     }
   }