radv: only enable one channel when exporting prim id

It's a 32-bit integer like the layer.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/amd/vulkan/radv_nir_to_llvm.c b/src/amd/vulkan/radv_nir_to_llvm.c
index ad046ad..c8d383e 100644 (file)
--- a/src/amd/vulkan/radv_nir_to_llvm.c
+++ b/src/amd/vulkan/radv_nir_to_llvm.c
@@ -2357,7 +2357,7 @@ handle_vs_outputs_post(struct radv_shader_context *ctx,
                for (unsigned j = 1; j < 4; j++)
                        values[j] = ctx->ac.f32_0;
 
-               radv_export_param(ctx, param_count, values, 0xf);
+               radv_export_param(ctx, param_count, values, 0x1);
 
                outinfo->vs_output_param_offset[VARYING_SLOT_PRIMITIVE_ID] = param_count++;
                outinfo->export_prim_id = true;