mesa/st: do not run lower_psiz_mov on vertex shader if geometry shader is present

this only needs to be changed on the last stage between the two
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <mesa/mesa!5885>

src/mesa/state_tracker/st_atom_shader.c

@@ -225,9 +225,11 @@ st_update_vp( struct st_context *st )
          key.clip_negative_one_to_one =
                st->ctx->Transform.ClipDepthMode == GL_NEGATIVE_ONE_TO_ONE;
 
-      /* _NEW_POINT */
-      key.lower_point_size = st->lower_point_size &&
-                             !st_point_size_per_vertex(st->ctx);
+      if (!st->ctx->GeometryProgram._Current) {
+         /* _NEW_POINT */
+         key.lower_point_size = st->lower_point_size &&
+                                !st_point_size_per_vertex(st->ctx);
+      }
 
       /* _NEW_TRANSFORM */
       if (st->lower_ucp && st_user_clip_planes_enabled(st->ctx) &&

src/mesa/state_tracker/st_context.c

@@ -258,6 +258,10 @@ st_invalidate_state(struct gl_context *ctx)
       }
    }
 
+   /* Update the vertex shader if ctx->Point was changed. */
+   if (st->lower_point_size && new_state & _NEW_POINT)
+      st->dirty |= ST_NEW_VS_STATE | ST_NEW_GS_STATE;
+
    /* Which shaders are dirty will be determined manually. */
    if (new_state & _NEW_PROGRAM) {
       st->gfx_shaders_may_be_dirty = true;