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authorWANG Siyuan <wangsiyuanbuaa@gmail.com>2013-09-22 15:20:37 +0800
committerBruce Griffith <Bruce.Griffith@se-eng.com>2013-10-15 05:02:25 +0200
commit4ca721399cdb8012f9ac81e20129afe5ddda84cc (patch)
treef9380505a174cc826aa026389758c3895e2e89ce /src/mainboard/amd
parent2c86fc434383838c593c38feb5c28de78f18ea8d (diff)
downloadcoreboot-4ca721399cdb8012f9ac81e20129afe5ddda84cc.tar.xz
AMD Olive Hill: Disable NoSnoopEnable to fix HDMI audio corruptions with Ubuntu
Ubuntu's HDMI audio has noise and echo. Disable NoSnoopEnable can resolve this issue. I have tested on Ubuntu 13.04 with AMD Catalyst 13.4 Proprietary Linux Display Driver[1]. [1]. http://support.amd.com/us/gpudownload/linux/Pages/radeon_linux.aspx Change-Id: I5d2dddb1b7469d56cd64e3c1e0f4c6c6f095b4ab Signed-off-by: WANG Siyuan <SiYuan.Wang@amd.com> Signed-off-by: WANG Siyuan <wangsiyuanbuaa@gmail.com> Reviewed-on: http://review.coreboot.org/3934 Tested-by: build bot (Jenkins) Reviewed-by: Dave Frodin <dave.frodin@se-eng.com>
Diffstat (limited to 'src/mainboard/amd')
-rw-r--r--src/mainboard/amd/olivehill/get_bus_conf.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/mainboard/amd/olivehill/get_bus_conf.c b/src/mainboard/amd/olivehill/get_bus_conf.c
index fb63ace4c5..a380872566 100644
--- a/src/mainboard/amd/olivehill/get_bus_conf.c
+++ b/src/mainboard/amd/olivehill/get_bus_conf.c
@@ -54,6 +54,7 @@ void get_bus_conf(void)
{
u32 apicid_base;
u32 status;
+ u32 value;
device_t dev;
int i, j;
@@ -98,6 +99,12 @@ void get_bus_conf(void)
pci_write_config32(dev, 0xF8, 0);
pci_write_config32(dev, 0xFC, 5); /* TODO: move it to dsdt.asl */
+ /* disable No Snoop */
+ dev = dev_find_slot(0, PCI_DEVFN(1, 1));
+ value = pci_read_config32(dev, 0x60);
+ value &= ~(1 << 11);
+ pci_write_config32(dev, 0x60, value);
+
sbdn_yangtze = 0;
memset(bus_yangtze, 0, sizeof(bus_yangtze));