drm/radeon/cayman: setup hdp to invalidate and flush when asked
On cayman we need to set the bit to cause HDP flushes to invalidate the
HDP cache also.
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 7aade20..57d3d6c 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -931,6 +931,10 @@
WREG32(CB_PERF_CTR3_SEL_0, 0);
WREG32(CB_PERF_CTR3_SEL_1, 0);
+ tmp = RREG32(HDP_MISC_CNTL);
+ tmp |= HDP_FLUSH_INVALIDATE_CACHE;
+ WREG32(HDP_MISC_CNTL, tmp);
+
hdp_host_path_cntl = RREG32(HDP_HOST_PATH_CNTL);
WREG32(HDP_HOST_PATH_CNTL, hdp_host_path_cntl);
diff --git a/drivers/gpu/drm/radeon/nid.h b/drivers/gpu/drm/radeon/nid.h
index 0f9a08b..b2088c1 100644
--- a/drivers/gpu/drm/radeon/nid.h
+++ b/drivers/gpu/drm/radeon/nid.h
@@ -136,6 +136,8 @@
#define HDP_NONSURFACE_INFO 0x2C08
#define HDP_NONSURFACE_SIZE 0x2C0C
#define HDP_ADDR_CONFIG 0x2F48
+#define HDP_MISC_CNTL 0x2F4C
+#define HDP_FLUSH_INVALIDATE_CACHE (1 << 0)
#define CC_SYS_RB_BACKEND_DISABLE 0x3F88
#define GC_USER_SYS_RB_BACKEND_DISABLE 0x3F8C