This needs to be explicitly set on btc. It's set by default
on evergreen/fusion, so it fine to just unconditionally enable it for
all chips.
Signed-off-by: Alex Deucher <alexdeucher@xxxxxxxxx>
---
drivers/gpu/drm/radeon/evergreen.c | 6 +++++-
drivers/gpu/drm/radeon/evergreend.h | 2 ++
2 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index c98abd5..9f907f7 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -1582,7 +1582,7 @@ static void evergreen_gpu_init(struct radeon_device *rdev)
u32 sq_stack_resource_mgmt_2;
u32 sq_stack_resource_mgmt_3;
u32 vgt_cache_invalidation;
- u32 hdp_host_path_cntl;
+ u32 hdp_host_path_cntl, tmp;
int i, j, num_shader_engines, ps_thread_count;
switch (rdev->family) {
@@ -2199,6 +2199,10 @@ static void evergreen_gpu_init(struct radeon_device *rdev)
for (i = SQ_ALU_CONST_BUFFER_SIZE_HS_0; i < 0x29000; i += 4)
WREG32(i, 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/evergreend.h b/drivers/gpu/drm/radeon/evergreend.h
index fc40e0c..f37e91e 100644
--- a/drivers/gpu/drm/radeon/evergreend.h
+++ b/drivers/gpu/drm/radeon/evergreend.h
@@ -64,6 +64,8 @@
#define GB_BACKEND_MAP 0x98FC
#define DMIF_ADDR_CONFIG 0xBD4
#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_RB_BACKEND_DISABLE 0x9B7C
--
1.7.1.1
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