From: Marek Olšák <marek.ol...@amd.com>
ported from Vulkan
---
src/gallium/drivers/radeonsi/si_state_draw.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c
b/src/gallium/drivers/radeonsi/si_state_draw.c
index 717149b..5f866d5 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -291,13 +291,21 @@ static unsigned si_get_ia_multi_vgt_param(struct
si_context *sctx,
if (sctx->b.chip_class >= CIK) {
/* WD_SWITCH_ON_EOP has no effect on GPUs with less than
* 4 shader engines. Set 1 to pass the assertion below.
- * The other cases are hardware requirements. */
+ * The other cases are hardware requirements.
+ *
+ * Polaris supports primitive restart with WD_SWITCH_ON_EOP=0
+ * for points, line strips, and tri strips.
+ */
if (sctx->b.screen->info.max_se < 4 ||
prim == PIPE_PRIM_POLYGON ||
prim == PIPE_PRIM_LINE_LOOP ||
prim == PIPE_PRIM_TRIANGLE_FAN ||
prim == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY ||
- info->primitive_restart ||
+ (info->primitive_restart &&
+ (sctx->b.family < CHIP_POLARIS10 ||
+ (prim != PIPE_PRIM_POINTS &&
+ prim != PIPE_PRIM_LINE_STRIP &&
+ prim != PIPE_PRIM_TRIANGLE_STRIP))) ||
info->count_from_stream_output)
wd_switch_on_eop = true;
--
2.7.4
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