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-rw-r--r--src/amd/vulkan/radv_cmd_buffer.c1
-rw-r--r--src/amd/vulkan/radv_private.h1
-rw-r--r--src/amd/vulkan/si_cmd_buffer.c7
3 files changed, 9 insertions, 0 deletions
diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 963118215fa..b04c998fac2 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -2202,6 +2202,7 @@ radv_emit_draw_registers(struct radv_cmd_buffer *cmd_buffer,
ia_multi_vgt_param =
si_get_ia_multi_vgt_param(cmd_buffer, draw_info->instance_count > 1,
draw_info->indirect,
+ !!draw_info->strmout_buffer,
draw_info->indirect ? 0 : draw_info->count);
if (state->last_ia_multi_vgt_param != ia_multi_vgt_param) {
diff --git a/src/amd/vulkan/radv_private.h b/src/amd/vulkan/radv_private.h
index 352072f8ff3..df85d0cf889 100644
--- a/src/amd/vulkan/radv_private.h
+++ b/src/amd/vulkan/radv_private.h
@@ -1160,6 +1160,7 @@ void si_write_scissors(struct radeon_cmdbuf *cs, int first,
const VkViewport *viewports, bool can_use_guardband);
uint32_t si_get_ia_multi_vgt_param(struct radv_cmd_buffer *cmd_buffer,
bool instanced_draw, bool indirect_draw,
+ bool count_from_stream_output,
uint32_t draw_vertex_count);
void si_cs_emit_write_event_eop(struct radeon_cmdbuf *cs,
enum chip_class chip_class,
diff --git a/src/amd/vulkan/si_cmd_buffer.c b/src/amd/vulkan/si_cmd_buffer.c
index e75c6d127d6..e73c13762e5 100644
--- a/src/amd/vulkan/si_cmd_buffer.c
+++ b/src/amd/vulkan/si_cmd_buffer.c
@@ -561,6 +561,7 @@ radv_prims_for_vertices(struct radv_prim_vertex_count *info, unsigned num)
uint32_t
si_get_ia_multi_vgt_param(struct radv_cmd_buffer *cmd_buffer,
bool instanced_draw, bool indirect_draw,
+ bool count_from_stream_output,
uint32_t draw_vertex_count)
{
enum chip_class chip_class = cmd_buffer->device->physical_device->rad_info.chip_class;
@@ -622,6 +623,12 @@ si_get_ia_multi_vgt_param(struct radv_cmd_buffer *cmd_buffer,
(instanced_draw || indirect_draw))
partial_vs_wave = true;
+ /* Hardware requirement when drawing primitives from a stream
+ * output buffer.
+ */
+ if (count_from_stream_output)
+ wd_switch_on_eop = true;
+
/* If the WD switch is false, the IA switch must be false too. */
assert(wd_switch_on_eop || !ia_switch_on_eop);
}