diff --git a/drivers/gpu/drm/bridge/waveshare-dsi.c b/drivers/gpu/drm/bridge/waveshare-dsi.c
index 9254446f5495..0497c7ecbc7a 100644
--- a/drivers/gpu/drm/bridge/waveshare-dsi.c
+++ b/drivers/gpu/drm/bridge/waveshare-dsi.c
@@ -66,7 +66,12 @@ static int ws_bridge_attach_dsi(struct ws_bridge *ws)
 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
 			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
 	dsi->format = MIPI_DSI_FMT_RGB888;
-	dsi->lanes = 2;
+	dsi->lanes = drm_of_get_data_lanes_count_ep(dev->of_node, 0, 0, 1, 4);
+	if (dsi->lanes < 0) {
+		dev_warn(dev, "Invalid or missing DSI lane count %d, falling back to 2 lanes\n",
+			 dsi->lanes);
+		dsi->lanes = 2;	/* Old DT backward compatibility */
+	}
 
 	ret = devm_mipi_dsi_attach(dev, dsi);
 	if (ret < 0)