From bc1fde310eb77111ad105c59883d6a05baa5f25d Mon Sep 17 00:00:00 2001
From: Liju-Clr Chen <liju-clr.chen@mediatek.com>
Date: Thu, 2 Mar 2023 15:47:15 +0800
Subject: [PATCH] mb/google/geralt: Add mtcmos bus protection for display

Enable bus protection for display to avoid bus hang and incomplete bus
transaction.

BUG=b:264204465
TEST=test firmware and kernel display pass for MIPI panel on geralt.

Change-Id: Iac61a69f2b84966dd468442daaa59d83eec775aa
Signed-off-by: Liju-Clr Chen <liju-clr.chen@mediatek.com>
Signed-off-by: jason-ch chen <Jason-ch.Chen@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73411
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
---
 src/mainboard/google/geralt/display.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mainboard/google/geralt/display.c b/src/mainboard/google/geralt/display.c
index 396d6e0c03..bbdd808fa1 100644
--- a/src/mainboard/google/geralt/display.c
+++ b/src/mainboard/google/geralt/display.c
@@ -27,6 +27,7 @@ int configure_display(void)
 	printk(BIOS_INFO, "%s: Starting display initialization\n", __func__);
 
 	mtcmos_display_power_on();
+	mtcmos_protect_display_bus();
 
 	panel->configure_panel_backlight();
 	panel->power_on();