plymouth: Add the retain-splash option

Adding the "retain-splash” option to tell plymouth to keep the boot
splash’s contents on screen even after plymouth exits to make the
splash screen show more friendly on the system which boots so fast.

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-core/plymouth/files/0001-plymouth-Add-the-retain-splash-option.patch

@@ -0,0 +1,35 @@
+From f270f80d4c36a22a0f7b8de8fb6b1abef6f7b183 Mon Sep 17 00:00:00 2001
+From: Mingli Yu <mingli.yu@windriver.com>
+Date: Tue, 15 Feb 2022 16:23:10 +0800
+Subject: [PATCH] plymouth : Add the retain-splash option
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Adding the "retain-splash” option to tell plymouth to keep the boot
+splash’s contents on screen even after plymouth exits to make the
+splash screen show more friendly on the system which boots so fast.
+
+Upstream-Status: Inappropriate[embedded specific]
+
+Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
+---
+ systemd-units/plymouth-quit.service.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/systemd-units/plymouth-quit.service.in b/systemd-units/plymouth-quit.service.in
+index ed9f9b9..147e9ee 100644
+--- a/systemd-units/plymouth-quit.service.in
++++ b/systemd-units/plymouth-quit.service.in
+@@ -3,7 +3,7 @@ Description=Terminate Plymouth Boot Screen
+ After=rc-local.service plymouth-start.service systemd-user-sessions.service
+ 
+ [Service]
+-ExecStart=-@PLYMOUTH_CLIENT_DIR@/plymouth quit
++ExecStart=-@PLYMOUTH_CLIENT_DIR@/plymouth quit --retain-splash
+ Type=oneshot
+ RemainAfterExit=yes
+ TimeoutSec=20
+-- 
+2.17.1
+

meta-oe/recipes-core/plymouth/plymouth_0.9.5.bb

@@ -22,6 +22,7 @@ SRC_URI = " \
     file://0001-Make-full-path-to-systemd-tty-ask-password-agent-con.patch \
     file://0001-systemd-switch-to-KillMode-mixed.patch \
     file://0001-plymouth-start-service-in-add-related-kernel-paramet.patch \
+    file://0001-plymouth-Add-the-retain-splash-option.patch \
         "
 
 SRC_URI[md5sum] = "8a25d23f3ae732af300a56fa33cacff2"