diff --git a/src/amd/vulkan/radv_shader.c b/src/amd/vulkan/radv_shader.c
index 14fc79c8f2c..079b60893f3 100644
--- a/src/amd/vulkan/radv_shader.c
+++ b/src/amd/vulkan/radv_shader.c
@@ -740,14 +740,10 @@ radv_consider_culling(const struct radv_physical_device *pdev, struct nir_shader
    /* Shader based culling efficiency can depend on PS throughput.
     * Estimate an upper limit for PS input param count based on GPU info.
     */
-   unsigned max_ps_params;
-   unsigned max_render_backends = pdev->info.max_render_backends;
-   unsigned max_se = pdev->info.max_se;
+   unsigned max_ps_params = 4;
 
-   if (max_render_backends / max_se == 4)
-      max_ps_params = 6; /* Navi21 and other GFX10.3 dGPUs. */
-   else
-      max_ps_params = 4; /* Navi 1x. */
+   if (pdev->info.gfx_level >= GFX10_3 && pdev->info.has_dedicated_vram)
+      max_ps_params = 6; /* GFX10.3 and newer discrete GPUs. */
 
    /* TODO: consider other heuristics here, such as PS execution time */
    if (util_bitcount64(ps_inputs_read & ~VARYING_BIT_POS) > max_ps_params)