From 53c60ea935d96a669ce4556da8c7f66790778729 Mon Sep 17 00:00:00 2001
From: "Yafeng.Gao" <66775784+SeraphCD@users.noreply.github.com>
Date: Wed, 13 Mar 2024 01:07:15 +0800
Subject: [PATCH] fix bug

fix compatible="panel-dpi" node not have data-mapping will cause panic
---
 drivers/gpu/drm/panel/panel-simple.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 1ff29d660c9609..b8fbf29d280701 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -493,6 +493,11 @@ static int panel_dpi_probe(struct device *dev,
 	of_property_read_u32(np, "height-mm", &desc->size.height);
 
 	of_property_read_string(np, "data-mapping", &mapping);
+	if(!mapping){
+		dev_err(dev, "%pOF: no data-mapping node found for \"panel-dpi\" binding\n",
+			np);
+		return -EINVAL;
+	}
 	if (!strcmp(mapping, "rgb24")) {
 		desc->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 		desc->bpc = 8;