psplash: add systemd support

Make use of the recently added systemd support in psplash. The utility
psplash-systemd communicates boot progress to the splash screen. The
splash is disabled once systemd consideres the system fully booted
(progress is at 1.0). Note that this can take a while if systemd is
stuck on a failing unit.

This change adds two systemd services. One service starts psplash itself
(psplash-start.service) and the second service starts the helper utility
psplash-systemd (psplash-systemd.service). The units are written such
that psplash-systemd.service can be used indepenendenly. This is useful
when starting psplash in initramfs (not using systemd).

(From OE-Core rev: b4063b16082604554c7c19b369ebddd27061f372)

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 24 insertions, 4 deletions

diff --git a/meta/recipes-core/psplash/files/psplash-init b/meta/recipes-core/psplash/files/psplash-init
index 4bee866b0d..f58e043733 100755
--- a/meta/recipes-core/psplash/files/psplash-init
+++ b/meta/recipes-core/psplash/files/psplash-init
@@ -23,10 +23,10 @@ for x in $CMDLINE; do
         esac
 done
 
-export TMPDIR=/mnt/.psplash
-[ -d $TMPDIR ] || mkdir -p $TMPDIR
-if ! mountpoint -q $TMPDIR; then
-        mount tmpfs -t tmpfs $TMPDIR -o,size=40k
+export PSPLASH_FIFO_DIR=/mnt/.psplash
+[ -d $PSPLASH_FIFO_DIR ] || mkdir -p $PSPLASH_FIFO_DIR
+if ! mountpoint -q $PSPLASH_FIFO_DIR; then
+        mount tmpfs -t tmpfs $PSPLASH_FIFO_DIR -o,size=40k
 fi
 
 rotation=0
diff --git a/meta/recipes-core/psplash/files/psplash-start.service b/meta/recipes-core/psplash/files/psplash-start.service
new file mode 100644
index 0000000000..9de8f6321a
--- /dev/null
+++ b/meta/recipes-core/psplash/files/psplash-start.service
@@ -0,0 +1,10 @@
+[Unit]
+Description=Start psplash boot splash screen
+DefaultDependencies=no
+Requires=psplash-systemd.service
+
+[Service]
+ExecStart=/usr/bin/psplash
+
+[Install]
+WantedBy=sysinit.target
diff --git a/meta/recipes-core/psplash/files/psplash-systemd.service b/meta/recipes-core/psplash/files/psplash-systemd.service
new file mode 100644
index 0000000000..e14f42032d
--- /dev/null
+++ b/meta/recipes-core/psplash/files/psplash-systemd.service
@@ -0,0 +1,10 @@
+[Unit]
+Description=Start psplash-systemd progress communication helper
+DefaultDependencies=no
+After=systemd-start.service
+
+[Service]
+ExecStart=/usr/bin/psplash-systemd
+
+[Install]
+WantedBy=sysinit.target