Cc: "13.0 17.0" <mesa-sta...@lists.freedesktop.org>
---
src/mesa/drivers/dri/i965/genX_blorp_exec.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/src/mesa/drivers/dri/i965/genX_blorp_exec.c
b/src/mesa/drivers/dri/i965/genX_blorp_exec.c
index f9334ee..b6122a3 100644
--- a/src/mesa/drivers/dri/i965/genX_blorp_exec.c
+++ b/src/mesa/drivers/dri/i965/genX_blorp_exec.c
@@ -122,8 +122,19 @@ blorp_alloc_vertex_buffer(struct blorp_batch *batch,
uint32_t size,
assert(batch->blorp->driver_ctx == batch->driver_batch);
struct brw_context *brw = batch->driver_batch;
+ /* From the Sky Lake PRM, 3DSTATE_VERTEX_BUFFERS:
+ *
+ * "The VF cache needs to be invalidated before binding and then using
+ * Vertex Buffers that overlap with any previously bound Vertex Buffer
+ * (at a 64B granularity) since the last invalidation. A VF cache
+ * invalidate is performed by setting the "VF Cache Invalidation Enable"
+ * bit in PIPE_CONTROL."
+ *
+ * In order to avoid this problem, we align all vertex buffer allocations
+ * to 64 bytes.
+ */
uint32_t offset;
- void *data = brw_state_batch(brw, size, 32, &offset);
+ void *data = brw_state_batch(brw, size, 64, &offset);
*addr = (struct blorp_address) {
.buffer = brw->batch.bo,
--
2.5.0.400.gff86faf
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