radeonsi: simplify si_get_input_prim and remove incorrect TODO comment

u_vertices_per_prim(QUADS) is the same as TRIANGLES.

Reviewed-by: Pierre-Eric Pelloux-Prayer <[email protected]>

3 files changed, 5 insertions, 11 deletions

diff --git a/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c b/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
index c4bdff35deb..f5c41cd07a4 100644
--- a/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
+++ b/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
@@ -1315,10 +1315,7 @@ void gfx10_ngg_calculate_subgroup_info(struct si_shader *shader)
 		shader->previous_stage_sel ? shader->previous_stage_sel : gs_sel;
 	const enum pipe_shader_type gs_type = gs_sel->type;
 	const unsigned gs_num_invocations = MAX2(gs_sel->gs_num_invocations, 1);
-	/* TODO: Use QUADS as the worst case because of reuse, but triangles
-	 * will always have 1 additional unoccupied vector lane. We could use
-	 * that lane if the worst case was TRIANGLES. */
-	const unsigned input_prim = si_get_input_prim(gs_sel, PIPE_PRIM_QUADS);
+	const unsigned input_prim = si_get_input_prim(gs_sel);
 	const bool use_adjacency = input_prim >= PIPE_PRIM_LINES_ADJACENCY &&
 				   input_prim <= PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY;
 	const unsigned max_verts_per_prim = u_vertices_per_prim(input_prim);
diff --git a/src/gallium/drivers/radeonsi/si_state.h b/src/gallium/drivers/radeonsi/si_state.h
index a0fe826253a..acdbefbf64f 100644
--- a/src/gallium/drivers/radeonsi/si_state.h
+++ b/src/gallium/drivers/radeonsi/si_state.h
@@ -599,8 +599,7 @@ void si_shader_selector_key_vs(struct si_context *sctx,
 			       struct si_shader_selector *vs,
 			       struct si_shader_key *key,
 			       struct si_vs_prolog_bits *prolog_key);
-unsigned si_get_input_prim(const struct si_shader_selector *gs,
-			   unsigned default_worst_case);
+unsigned si_get_input_prim(const struct si_shader_selector *gs);
 
 /* si_state_draw.c */
 void si_emit_surface_sync(struct si_context *sctx, struct radeon_cmdbuf *cs,
diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c b/src/gallium/drivers/radeonsi/si_state_shaders.c
index 388bc68adce..325eae19bed 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -1060,8 +1060,7 @@ static void si_set_ge_pc_alloc(struct si_screen *sscreen,
 		       S_030980_NUM_PC_LINES((culling ? 256 : 128) * sscreen->info.max_se - 1));
 }
 
-unsigned si_get_input_prim(const struct si_shader_selector *gs,
-			   unsigned default_worst_case)
+unsigned si_get_input_prim(const struct si_shader_selector *gs)
 {
 	if (gs->type == PIPE_SHADER_GEOMETRY)
 		return gs->info.properties[TGSI_PROPERTY_GS_INPUT_PRIM];
@@ -1075,7 +1074,7 @@ unsigned si_get_input_prim(const struct si_shader_selector *gs,
 	}
 
 	/* TODO: Set this correctly if the primitive type is set in the shader key. */
-	return default_worst_case;
+	return PIPE_PRIM_TRIANGLES; /* worst case for all callers */
 }
 
 /**
@@ -1098,8 +1097,7 @@ static void gfx10_shader_ngg(struct si_screen *sscreen, struct si_shader *shader
 		gs_info->properties[TGSI_PROPERTY_VS_WINDOW_SPACE_POSITION];
 	bool es_enable_prim_id = shader->key.mono.u.vs_export_prim_id || es_info->uses_primid;
 	unsigned gs_num_invocations = MAX2(gs_sel->gs_num_invocations, 1);
-	/* Anything above TRIANGLES has the same effect as TRIANGLES here. */
-	unsigned input_prim = si_get_input_prim(gs_sel, PIPE_PRIM_TRIANGLES);
+	unsigned input_prim = si_get_input_prim(gs_sel);
 	bool break_wave_at_eoi = false;
 	struct si_pm4_state *pm4 = si_get_shader_pm4_state(shader);
 	if (!pm4)