freedreno: Don't count primitives for patches

The gallium helper doesn't like patches and we can't determine how
many primitives it gets tessellated into anyway.  On gens where we
have tessellation, we get the prim count from a HW counter so just
skip counting on the CPU.

Signed-off-by: Kristian H. Kristensen <hoegsberg@google.com>
Acked-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Rob Clark <robdclark@gmail.com>

diff --git a/src/gallium/drivers/freedreno/freedreno_draw.c b/src/gallium/drivers/freedreno/freedreno_draw.c
index 059de2ec8c612dcf9f1165bd4adc834f3b5a73a7..b738498c56baabdd7465c33ff05a17b596c85fc3 100644 (file)
--- a/src/gallium/drivers/freedreno/freedreno_draw.c
+++ b/src/gallium/drivers/freedreno/freedreno_draw.c
@@ -256,7 +256,14 @@ fd_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
 
        batch->num_draws++;
 
-       prims = u_reduced_prims_for_vertices(info->mode, info->count);
+       /* Counting prims in sw doesn't work for GS and tesselation. For older
+        * gens we don't have those stages and don't have the hw counters enabled,
+        * so keep the count accurate for non-patch geometry.
+        */
+       if (info->mode != PIPE_PRIM_PATCHES)
+               prims = u_reduced_prims_for_vertices(info->mode, info->count);
+       else
+               prims = 0;
 
        ctx->stats.draw_calls++;