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| author | Patrick Rudolph <siro@das-labor.org> | 2015-07-28 07:51:10 +0200 |
|---|---|---|
| committer | Alexandru Gagniuc <mr.nuke.me@gmail.com> | 2015-10-09 14:59:30 +0000 |
| commit | 2a510a7a8627526d9516998248dda9c762333391 (patch) | |
| tree | 6aff8d6805eb192ad7230538fb4f3f212ad802a7 /src/northbridge | |
| parent | 3660c0fc658e4e20ef079f762dfc7ad05c83544c (diff) | |
| download | coreboot-2a510a7a8627526d9516998248dda9c762333391.tar.xz | |
northbridge/intel/sandybridge: Do not disable PEG by default
Don't disable PEG bits while turning on IGD.
Fixes PCI device enumeration of PEG devices.
Test system:
* Intel Pentium CPU G2130
* Gigabyte GA-B75M-D3H
Sidenote: This should be taken from a CMOS option instead.
Change-Id: I2d6522504e4404f2d57f9c319351d08317aefdcb
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/11058
Tested-by: build bot (Jenkins)
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/sandybridge/early_init.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/northbridge/intel/sandybridge/early_init.c b/src/northbridge/intel/sandybridge/early_init.c index e77cf22596..7b60ec7153 100644 --- a/src/northbridge/intel/sandybridge/early_init.c +++ b/src/northbridge/intel/sandybridge/early_init.c @@ -155,6 +155,7 @@ static void sandybridge_setup_graphics(void) void sandybridge_early_initialization(int chipset_type) { u32 capid0_a; + u32 deven; u8 reg8; /* Device ID Override Enable should be done very early */ @@ -172,8 +173,9 @@ void sandybridge_early_initialization(int chipset_type) /* Setup all BARs required for early PCIe and raminit */ sandybridge_setup_bars(); - /* Device Enable */ - pci_write_config32(PCI_DEV(0, 0, 0), DEVEN, DEVEN_HOST | DEVEN_IGD); + /* Device Enable, don't touch PEG bits */ + deven = pci_read_config32(PCI_DEV(0, 0, 0), DEVEN) | DEVEN_IGD; + pci_write_config32(PCI_DEV(0, 0, 0), DEVEN, deven); sandybridge_setup_graphics(); } |