commit 812d046915f48236657f02c06d7dc47140e9ceda
author Alex Deucher <alexdeucher@gmail.com> Mon Jul 26 18:51:53 2010 -0400
committer Dave Airlie <airlied@redhat.com> Mon Aug 02 10:06:18 2010 +1000
tree 77a9c724a2316593fa22f7442d5c4a8d00c9af32
parent 833ee5c4ab36937a99e63935d7f06bc2c1f9343b

drm/radeon/kms/r7xx: add workaround for hw issue with HDP flush

Use of HDP_*_COHERENCY_FLUSH_CNTL can cause a hang in certain
situations.  Add workaround.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/r600d.h

diff --git a/drivers/gpu/drm/radeon/r600d.h b/drivers/gpu/drm/radeon/r600d.h
index b7318ac..858a192 100644
--- a/drivers/gpu/drm/radeon/r600d.h
+++ b/drivers/gpu/drm/radeon/r600d.h
@@ -250,6 +250,7 @@
 #define	HDP_NONSURFACE_SIZE				0x2C0C
 #define HDP_REG_COHERENCY_FLUSH_CNTL			0x54A0
 #define	HDP_TILING_CONFIG				0x2F3C
+#define HDP_DEBUG1                                      0x2F34
 
 #define MC_VM_AGP_TOP					0x2184
 #define MC_VM_AGP_BOT					0x2188