From 230fe0ef2f2e565a1b67ffea946d77c3c24ac0d4 Mon Sep 17 00:00:00 2001
From: Bruce Griffith <Bruce.Griffith@se-eng.com>
Date: Sun, 31 Aug 2014 22:40:57 -0600
Subject: AMD Steppe Eagle: Disable "No Snoop Enable" to stop HDMI audio
 stutter

Ubuntu's HDMI audio has noise and echo. Disable NoSnoopEnable can
resolve this issue.  The posted amd_late_init.c northbridge code
is missing a test for Steppe Eagle northbridges.  See coreboot Gerrit
change 3934, commit ID 4ca721399c (AMD Olive Hill: Disable
NoSnoopEnable to fix HDMI audio corruptions with Ubuntu).

Change-Id: I89894d0ce4ad72ea16d61b445edb9e67920bca24
Signed-off-by: Bruce Griffith <Bruce.Griffith@se-eng.com>
Reviewed-on: http://review.coreboot.org/6822
Tested-by: build bot (Jenkins)
Reviewed-by: WANG Siyuan <wangsiyuanbuaa@gmail.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
---
 src/cpu/amd/agesa/amd_late_init.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/cpu/amd/agesa/amd_late_init.c b/src/cpu/amd/agesa/amd_late_init.c
index faba328eea..c7927dc7c1 100644
--- a/src/cpu/amd/agesa/amd_late_init.c
+++ b/src/cpu/amd/agesa/amd_late_init.c
@@ -20,8 +20,11 @@
 #include <arch/acpi.h>
 #include <bootstate.h>
 #include <console/console.h>
+#include <device/device.h>
+#include <device/pci_def.h>
+#include <device/pci_ops.h>
 
-#include "agesawrapper.h"
+#include <agesawrapper.h>
 #include <northbridge/amd/agesa/agesawrapper_call.h>
 
 #if IS_ENABLED(CONFIG_HUDSON_IMC_FWM)
@@ -31,6 +34,9 @@
 #include <sb_cimx.h>
 #endif
 
+#define NORTHBRIDGE_00700F00 IS_ENABLED(CONFIG_NORTHBRIDGE_AMD_AGESA_FAMILY_16KB)
+#define NORTHBRIDGE_00730F01 IS_ENABLED(CONFIG_NORTHBRIDGE_AMD_AGESA_00730F01)
+
 static void agesawrapper_post_device(void *unused)
 {
 	if (acpi_is_wakeup_s3())
@@ -38,7 +44,7 @@ static void agesawrapper_post_device(void *unused)
 
 	AGESAWRAPPER(amdinitlate);
 
-#if IS_ENABLED(CONFIG_NORTHBRIDGE_AMD_AGESA_FAMILY_16KB)
+#if (NORTHBRIDGE_00700F00) || (NORTHBRIDGE_00730F01)
 	device_t dev;
 	u32 value;
 	dev = dev_find_slot(0, PCI_DEVFN(0, 0)); /* clear IoapicSbFeatureEn */
-- 
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