From: Eric Anholt <eric@anholt.net>
Date: Fri, 1 Dec 2017 23:29:05 +0000 (-0800)
Subject: broadcom/vc4: Fix the scaling factor for the GFXH-515 workaround.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bcb6ebe91a1bbbe6ad62f0e99707414fb91e488e;p=mesa.git

broadcom/vc4: Fix the scaling factor for the GFXH-515 workaround.

For triangle strips, we step by max_verts - 2.
---

diff --git a/src/gallium/drivers/vc4/vc4_draw.c b/src/gallium/drivers/vc4/vc4_draw.c
index 9522bb94dda..0df22931410 100644
--- a/src/gallium/drivers/vc4/vc4_draw.c
+++ b/src/gallium/drivers/vc4/vc4_draw.c
@@ -40,7 +40,7 @@ vc4_get_draw_cl_space(struct vc4_job *job, int vert_count)
         /* The SW-5891 workaround may cause us to emit multiple shader recs
          * and draw packets.
          */
-        int num_draws = DIV_ROUND_UP(vert_count, 65535) + 1;
+        int num_draws = DIV_ROUND_UP(vert_count, 65535 - 2) + 1;
 
         /* Binner gets our packet state -- vc4_emit.c contents,
          * and the primitive itself.