From: Marek Olšák <marek.ol...@amd.com>
Ported from Vulkan.
---
src/gallium/drivers/radeonsi/si_state_draw.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c
b/src/gallium/drivers/radeonsi/si_state_draw.c
index c2d9a2f..f43d56e 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -307,6 +307,17 @@ static unsigned si_get_ia_multi_vgt_param(struct
si_context *sctx,
(info->indirect || info->instance_count > 1))
wd_switch_on_eop = true;
+ /* Performance recommendation for 4 SE Gfx7-8 parts if
+ * instances are smaller than a primgroup. Ignore the fact
+ * primgroup_size is a primitive count, not vertex count.
+ * Don't do anything for indirect draws.
+ */
+ if (sctx->b.chip_class <= VI &&
+ sctx->b.screen->info.max_se >= 4 &&
+ !info->indirect &&
+ info->instance_count > 1 && info->count < primgroup_size)
+ wd_switch_on_eop = true;
+
/* Required on CIK and later. */
if (sctx->b.screen->info.max_se > 2 && !wd_switch_on_eop)
ia_switch_on_eoi = true;
--
2.7.4
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