diff options
| author | Zheng Bao <zheng.bao@amd.com> | 2009-06-05 10:00:07 +0000 |
|---|---|---|
| committer | Zheng Bao <Zheng.Bao@amd.com> | 2009-06-05 10:00:07 +0000 |
| commit | 28d71b9445ef2774baa5e1f5ad17160d90b0e8bb (patch) | |
| tree | fb70299dea5d7924fe7d63af399e095881511cf9 /src/southbridge/amd | |
| parent | a24e1dd6dacc4036466f5fc8acd5a1c4306790d2 (diff) | |
After I modify the pci_ext_read_config32 and pci_ext_read_config32, the step 6a
starts to play its role. Then the system hangs at HDA init. I dont know what the
VC1 is. The RPR says "Optional Features (only needed if CMOS option is enabled)"
in 5.10.2. Before I know what it is, I think it is better to skip it.
Tested on dbm690t.
Add comment from Rudolf,
"
VC is virtual channel. Its used for isochronous transfer of data to sound card.
The virtual channel guarantee "on time" delivery. In other words it sets up a
channel for data to sound card, which means that that arrivs in time and there will
be no interuptions in audio stream.
http://www.microsoft.com/whdc/connect/pci/wlp_interrupt.mspx
"
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4339 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge/amd')
| -rw-r--r-- | src/southbridge/amd/rs690/rs690_pcie.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/southbridge/amd/rs690/rs690_pcie.c b/src/southbridge/amd/rs690/rs690_pcie.c index 12fea1f2c9..b454783aae 100644 --- a/src/southbridge/amd/rs690/rs690_pcie.c +++ b/src/southbridge/amd/rs690/rs690_pcie.c @@ -276,6 +276,9 @@ void rs690_gpp_sb_init(device_t nb_dev, device_t dev, u32 port) /* step 6a: VCI */ sb_dev = dev_find_slot(0, PCI_DEVFN(8, 0)); if (port == 8) { + /* The code below between #if and #endif causes a hang on HDA init. + * So we skip it. */ +#if 0 /* Clear bits 7:1 */ pci_ext_write_config32(nb_dev, sb_dev, 0x114, 0x3f << 1, 0 << 1); /* Maps Traffic Class 1-7 to VC1 */ @@ -284,7 +287,7 @@ void rs690_gpp_sb_init(device_t nb_dev, device_t dev, u32 port) pci_ext_write_config32(nb_dev, sb_dev, 0x120, 7 << 24, 1 << 24); /* Enables VC1 */ pci_ext_write_config32(nb_dev, sb_dev, 0x120, 1 << 31, 1 << 31); -#if 0 + do { reg16 = pci_ext_read_config32(nb_dev, sb_dev, 0x124); reg16 &= 0x2; |