From f987ea4feeed887b84825484337face948668ae6 Mon Sep 17 00:00:00 2001
From: Pierre-Hugues Husson <phh@phh.me>
Date: Thu, 14 May 2020 15:47:02 +0200
Subject: [PATCH] Update Samsung HBM  to use max brightnmess

---
 rw-system.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/rw-system.sh b/rw-system.sh
index c715ef7..68eb172 100644
--- a/rw-system.sh
+++ b/rw-system.sh
@@ -698,5 +698,7 @@ if getprop ro.vendor.build.fingerprint |grep -qiE \
 fi
 resetprop service.adb.root 0
 
-#This is for Samsung Galaxy devices with HBM FOD
-echo 319 > /sys/class/lcd/panel/mask_brightness
+# This is for Samsung Galaxy devices with HBM FOD
+# On those devices, a magic Layer usageBits switches to "mask_brightness"
+# But default is 255, so set it to max instead
+cat /sys/class/backlight/panel/max_brightness > /sys/class/lcd/panel/mask_brightness