From e19cd7889971f7975618f5e3cfd56f3274b4b11c Mon Sep 17 00:00:00 2001
From: Peter Cai <peter@typeblog.net>
Date: Thu, 2 Jan 2020 09:41:59 +0800
Subject: [PATCH] fix adf display devices on Spreadtrum devices for Android 10

* Somehow, when running GSI 10, Spreadtrum's adf driver do not show up
  with the correct name in /dev. I am not sure how this happens, but it
  seemed that a few `mknod`s fixed the problem. This was tested on
  Xiaomi Qin 2 Pro.
---
 rw-system.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/rw-system.sh b/rw-system.sh
index 8a86b5f..7d909c7 100644
--- a/rw-system.sh
+++ b/rw-system.sh
@@ -520,3 +520,12 @@ done
 if [ "$has_hostapd" = false ];then
     setprop persist.sys.phh.system_hostapd true
 fi
+
+# Fix sprd adf for surfaceflinger to start
+# Somehow the names of the device nodes are incorrect on Android 10; fix them by mknod
+if [ -e /dev/sprd-adf-dev ];then
+    mknod -m666 /dev/adf0 c 250 0
+    mknod -m666 /dev/adf-interface0.0 c 250 1
+    mknod -m666 /dev/adf-overlay-engine0.0 c 250 2
+    restorecon /dev/adf0 /dev/adf-interface0.0 /dev/adf-overlay-engine0.0
+fi