zink: fix streamout for tess stage

the tess shader needs to actually emit xfb stuff in order for it to work

Fixes: 2891e0b74e ("zink: pull xfb info from tess shader when applicable")

Reviewed-by: Hoe Hao Cheng <haochengho12907@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9013>
(cherry picked from commit 8721a6cbf2)

.pick_status.json

@@ -3253,7 +3253,7 @@
         "description": "zink: fix streamout for tess stage",
         "nominated": true,
         "nomination_type": 1,
-        "resolution": 0,
+        "resolution": 1,
         "master_sha": null,
         "because_sha": "2891e0b74e6c6dc4a93bc73536949dbb93c2bb50"
     },

src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c

@@ -2931,8 +2931,8 @@ nir_to_spirv(struct nir_shader *s, const struct zink_so_info *so_info,
 
    emit_cf_list(&ctx, &entry->body);
 
-   /* vertex shader emits copied xfb outputs at the end of the shader */
-   if (so_info && ctx.stage == MESA_SHADER_VERTEX)
+   /* vertex/tess shader emits copied xfb outputs at the end of the shader */
+   if (so_info && (ctx.stage == MESA_SHADER_VERTEX || ctx.stage == MESA_SHADER_TESS_EVAL))
       emit_so_outputs(&ctx, so_info);
 
    spirv_builder_return(&ctx.builder); // doesn't belong here, but whatevz

src/gallium/drivers/zink/zink_program.c

@@ -691,7 +691,7 @@ zink_create_tes_state(struct pipe_context *pctx,
    else
       nir = (struct nir_shader *)shader->ir.nir;
 
-   return zink_shader_create(zink_screen(pctx->screen), nir, NULL);
+   return zink_shader_create(zink_screen(pctx->screen), nir, &shader->stream_output);
 }
 
 static void