diff --git a/sys/dev/drm/i915/vlv_dsi_pll.c b/sys/dev/drm/i915/vlv_dsi_pll.c
--- a/sys/dev/drm/i915/vlv_dsi_pll.c
+++ b/sys/dev/drm/i915/vlv_dsi_pll.c
@@ -322,6 +322,10 @@
 	/* pixel_format and pipe_bpp should agree */
 	assert_bpp_mismatch(intel_dsi->pixel_format, pipe_bpp);
 
+	if (pipe_bpp == 0) {
+		DRM_ERROR("Invalid BPP(0)\n");
+		return 0;
+	}
 	pclk = DIV_ROUND_CLOSEST(dsi_clock * intel_dsi->lane_count, pipe_bpp);
 
 	return pclk;