From 2c86fc434383838c593c38feb5c28de78f18ea8d Mon Sep 17 00:00:00 2001 From: WANG Siyuan Date: Mon, 23 Sep 2013 15:12:56 +0800 Subject: ASRock IMB_A180: fix Ubuntu HDMI audio issue Ubuntu's HDMI audio has noise and echo. Disable NoSnoopEnable can resolve this issue. I have tested on Ubuntu 13.04 with latest graphic driver. Change-Id: I09c19b8925eedee03cfb1d8c0831a84e8aeeba4f Signed-off-by: WANG Siyuan Signed-off-by: WANG Siyuan Reviewed-on: http://review.coreboot.org/3937 Tested-by: build bot (Jenkins) Reviewed-by: Dave Frodin --- src/mainboard/asrock/imb-a180/get_bus_conf.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'src') diff --git a/src/mainboard/asrock/imb-a180/get_bus_conf.c b/src/mainboard/asrock/imb-a180/get_bus_conf.c index fb63ace4c5..a380872566 100644 --- a/src/mainboard/asrock/imb-a180/get_bus_conf.c +++ b/src/mainboard/asrock/imb-a180/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)); -- cgit v1.2.3