radeonsi: enable distributed tess on multi-SE parts only

ported from Vulkan

Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

4 files changed, 7 insertions, 2 deletions

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index f38ecc15ab..633d4bb7a5 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -712,6 +712,10 @@ struct pipe_screen *radeonsi_screen_create(struct radeon_winsys *ws)
 	sscreen->tess_offchip_block_dw_size =
 		sscreen->b.family == CHIP_HAWAII ? 4096 : 8192;
 
+	sscreen->has_distributed_tess =
+		sscreen->b.chip_class >= VI &&
+		sscreen->b.info.max_se >= 2;
+
 	sscreen->b.has_cp_dma = true;
 	sscreen->b.has_streamout = true;
 	pipe_mutex_init(sscreen->shader_parts_mutex);
diff --git a/src/gallium/drivers/radeonsi/si_pipe.h b/src/gallium/drivers/radeonsi/si_pipe.h
index ee64ecc6fd..3aff0ac8c0 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.h
+++ b/src/gallium/drivers/radeonsi/si_pipe.h
@@ -83,6 +83,7 @@ struct si_screen {
 	struct r600_common_screen	b;
 	unsigned			gs_table_depth;
 	unsigned			tess_offchip_block_dw_size;
+	bool				has_distributed_tess;
 
 	/* Whether shaders are monolithic (1-part) or separate (3-part). */
 	bool				use_monolithic_shaders;
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c
index 35585107cd..ce8def4665 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -274,7 +274,7 @@ static unsigned si_get_ia_multi_vgt_param(struct si_context *sctx,
 			partial_vs_wave = true;
 
 		/* Needed for 028B6C_DISTRIBUTION_MODE != 0 */
-		if (sctx->b.chip_class >= VI) {
+		if (sctx->screen->has_distributed_tess) {
 			if (sctx->gs_shader.cso)
 				partial_es_wave = true;
 			else
diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c b/src/gallium/drivers/radeonsi/si_state_shaders.c
index 9aa4a7c823..4bcdeb6a27 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -300,7 +300,7 @@ static void si_set_tesseval_regs(struct si_screen *sscreen,
 	else
 		topology = V_028B6C_OUTPUT_TRIANGLE_CW;
 
-	if (sscreen->b.chip_class >= VI) {
+	if (sscreen->has_distributed_tess) {
 		if (sscreen->b.family == CHIP_FIJI ||
 		    sscreen->b.family >= CHIP_POLARIS10)
 			distribution_mode = V_028B6C_DISTRIBUTION_MODE_TRAPEZOIDS;