From 1d02f7c2a4f126da43eafebebe7462cab08b581c Mon Sep 17 00:00:00 2001
From: Ken Wang <ken@radxa.com>
Date: Tue, 29 Aug 2023 15:33:43 +0800
Subject: [PATCH] drm: panel: add timeout detection when RPI LCD is not
 connected

Fix the issue that cannot boot properly when RPI LCD is not connected.

Signed-off-by: Ken Wang <ken@radxa.com>
---
 drivers/gpu/drm/panel/panel-raspits-tc358762.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-raspits-tc358762.c b/drivers/gpu/drm/panel/panel-raspits-tc358762.c
index 3fa1e283776b88..6cd4d304a0ce6c 100644
--- a/drivers/gpu/drm/panel/panel-raspits-tc358762.c
+++ b/drivers/gpu/drm/panel/panel-raspits-tc358762.c
@@ -39,6 +39,7 @@
 #include <video/videomode.h>
 #include <linux/delay.h>
 int trigger_bridge_raspits_tc358762 = 1;
+static int timeout = 5;
 
 struct panel_desc {
 	const struct drm_display_mode *modes;
@@ -527,8 +528,11 @@ static int raspits_tc358762_dsi_probe(struct mipi_dsi_device *dsi)
 	if (!id)
 		return -ENODEV;
 
-	if (!rockpi_mcu_is_connected())
+	if (!rockpi_mcu_is_connected() && timeout > 0){
+		msleep(100);
+		timeout--;
 		return -EPROBE_DEFER;
+	}
 
 	desc = id->data;