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README.md

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+# Duel head
+
+## Display
+- [Hardkernel 3.2" tft lcd](https://www.hardkernel.com/shop/c1-3-2inch-tfttouchscreen-shield/)
+- Generic HDMI monitor
+
+## Configuration
+
+### Package
+```bash
+sudo apt install gnome-icon-theme weston=9.0.0-4ubuntu1
+```
+
+The package `gnome-ichone-theme` is used for weston shortcut icon.
+
+### UDev `/etc/udev/rules.d/99-weston.rules`
+```text
+odroid@gnome-desktop:~$ cat /etc/udev/rules.d/99-weston.rules
+ACTION=="add|change", SUBSYSTEM=="drm", DEVPATH=="/devices/platform/soc/fe000000.apb4/fe050000.spi/spi_master/spi0/spi0.0/drm/card1", ENV{ID_SEAT}="seat-weston"
+#SUBSYSTEM=="graphics", ENV{ID_FOR_SEAT}=="graphics-platform-fe050000_spi-cs-0", ENV{ID_SEAT}="seat-weston"
+ACTION=="add|change", SUBSYSTEM=="input", ENV{ID_FOR_SEAT}=="input-platform-fe050000_spi-cs-1", ENV{ID_SEAT}="seat-weston"
+ACTION=="add|change", SUBSYSTEM=="input", KERNEL=="event[0-9]*", ENV{ID_INPUT_TOUCHSCREEN}=="1", OWNER="odroid", ENV{LIBINPUT_CALIBRATION_MATRIX}="1.366975 0.036143 -0.072346 -0.092563 -2.159515 1.082110"
+```
+The key is to set `ID_SEAT` on the device to be separated. In the example above, it was set to `seat-weston`.
+
+Simply set `ID_SEAT` on at least one graphics output device and the input device you want to isolate. also, set the touch calibration values.
+
+If `ID_SEAT` set, GDM and ubuntu desktop not use these devices. (They use `seat0` - default)
+
+
+### weston.ini `/etc/xdg/weston/weston.ini`
+```text
+odroid@gnome-desktop:~$ cat /etc/xdg/weston/weston.ini
+[core]
+require-input=false
+locking=false
+idle-time=0
+#gbm-format=abgr8888
+#repaint-window=16
+background-color=0x00ffffff
+background-type=scale
+panel-position=none
+startup-animation=none
+close-animation=none
+
+[shell]
+background-color=0xff002244
+clock-format=minutes
+locking=false
+
+[libinput]
+touchscreen_calibrator=true
+calibration_helper=/usr/bin/save-calibration
+
+[launcher]
+path=/usr/bin/weston-terminal
+icon=/usr/share/icons/gnome/24x24/apps/utilities-terminal.png
+
+[launcher]
+path=/root/tc
+icon=/usr/share/icons/gnome/24x24/apps/utilities-terminal.png
+
+[launcher]
+path=/usr/bin/weston-simple-egl
+icon=/usr/share/icons/gnome/24x24/apps/utilities-terminal.png
+
+#[input-method]
+#path=/usr/libexec/weston-keyboard
+
+#[xwayland]
+#path=/usr/bin/Xwayland
+
+#[autolaunch]
+#path=/usr/share/odroid-kiosk-weston/weston-autostart.sh
+#watch=true
+
+[output]
+name=UNNAMED-1
+mode=320x240
+ui-size=320x240
+priority=9
+seat=seat-weston
+```
+
+The key is `seat=seat-weston` in section `[output]`. Set the seat used for display.
+
+In weston9, the `SPI-1` device is recognized as `UNNAMED-1`, so we set it to `UNNAMED-1`.
+
+
+### Systemd
+#### Socket `/etc/systemd/system/weston.socket`
+```text
+odroid@gnome-desktop:~$ cat /etc/systemd/system/weston.socket
+[Unit]
+Description=Weston, a Wayland compositor
+
+[Socket]
+ListenStream=%t/weston-0
+```
+
+#### Service
+```text
+odroid@gnome-desktop:~$ cat /etc/systemd/system/weston.service
+[Unit]
+# Make sure we are started after logins are permitted.
+Description=Weston Wayland compositor startup
+Requires=systemd-user-sessions.service
+After=systemd-user-sessions.service
+After=plymouth-quit-wait.service
+Wants=dbus.socket
+After=dbus.socket
+Requires=weston.socket
+RequiresMountsFor=/run
+After=getty@tty7.service
+Conflicts=getty@tty7.service plymouth-quit.service
+Before=graphical.target
+ConditionPathExists=/dev/tty0
+
+[Service]
+Type=notify
+StandardInput=tty
+UtmpIdentifier=tty7
+User=root
+#Group=odroid
+EnvironmentFile=-/etc/default/weston
+Environment="XDG_RUNTIME_DIR=/run/user/0"
+Environment="DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/0/bus"
+#Environment=XDG_SEAT=seat-weston
+Environment=XDG_SESSION_CLASS=user
+#Environment=XDG_SESSION_TYPE=wayland
+#Environment=XDG_SESSION_DESKTOP=weston
+#Environment=HOME=/home/odroid
+#Environment=SEATD_VTBOUND=0
+
+PAMName=login
+
+TTYPath=/dev/tty7
+TTYReset=yes
+TTYVHangup=yes
+TTYVTDisallocate=yes
+
+StandardInput=tty-fail
+StandardOutput=journal
+StandardError=journal
+
+UtmpIdentifier=tty7
+UtmpMode=user
+
+ExecStart=/usr/bin/weston --log=/home/odroid/weston.log --seat=seat-weston --drm-device=card1 --socket=weston-0 --tty=7 --modules=systemd-notify.so
+
+[Install]
+WantedBy=graphical.target
+```
+In `ExecStart`...
+
+SPI Display's DRM device name is `card-1`, so must set `--drm-device=card1`
+
+Create a socket weston-0(`weston.socket`) and set it(`--socket=weston-0`) so that it does not overlap with sockets on the existing Ubuntu desktop.
+
+## TODO
+- Run weston without root

overlay/etc/systemd/system/weston.service

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+[Unit]
+# Make sure we are started after logins are permitted.
+Description=Weston Wayland compositor startup
+Requires=systemd-user-sessions.service
+After=systemd-user-sessions.service
+After=plymouth-quit-wait.service
+Wants=dbus.socket
+After=dbus.socket
+Requires=weston.socket
+RequiresMountsFor=/run
+After=getty@tty7.service
+Conflicts=getty@tty7.service plymouth-quit.service
+Before=graphical.target
+ConditionPathExists=/dev/tty0
+
+[Service]
+Type=notify
+StandardInput=tty
+UtmpIdentifier=tty7
+User=root
+#Group=odroid
+EnvironmentFile=-/etc/default/weston
+Environment="XDG_RUNTIME_DIR=/run/user/0"
+Environment="DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/0/bus"
+#Environment=XDG_SEAT=seat-weston
+Environment=XDG_SESSION_CLASS=user
+#Environment=XDG_SESSION_TYPE=wayland
+#Environment=XDG_SESSION_DESKTOP=weston
+#Environment=HOME=/home/odroid
+#Environment=SEATD_VTBOUND=0
+
+PAMName=login
+
+TTYPath=/dev/tty7
+TTYReset=yes
+TTYVHangup=yes
+TTYVTDisallocate=yes
+
+StandardInput=tty-fail
+StandardOutput=journal
+StandardError=journal
+
+UtmpIdentifier=tty7
+UtmpMode=user
+
+ExecStart=/usr/bin/weston --log=/home/odroid/weston.log --seat=seat-weston --drm-device=card1 --socket=weston-0 --tty=7 --modules=systemd-notify.so
+
+[Install]
+WantedBy=graphical.target

overlay/etc/systemd/system/weston.socket

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+[Unit]
+Description=Weston, a Wayland compositor
+
+[Socket]
+ListenStream=%t/weston-0

overlay/etc/udev/rules.d/99-touchscreen-calibration.rules

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+ACTION!="remove", SUBSYSTEM=="input", DEVPATH=="/devices/platform/soc/fe000000.apb4/fe050000.spi/spi_master/spi0/spi0.1/input/input4/event4", ENV{ID_INPUT_TOUCHSCREEN}=="1", ENV{LIBINPUT_CALIBRATION_MATRIX}="1.382308 0.050764 -0.072342 -0.013080 -2.273183 1.071859"

overlay/etc/udev/rules.d/99-weston.rules

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+ACTION=="add|change", SUBSYSTEM=="drm", DEVPATH=="/devices/platform/soc/fe000000.apb4/fe050000.spi/spi_master/spi0/spi0.0/drm/card1", ENV{ID_SEAT}="seat-weston"
+ACTION=="add|change", SUBSYSTEM=="input", ENV{ID_FOR_SEAT}=="input-platform-fe050000_spi-cs-1", ENV{ID_SEAT}="seat-weston"

overlay/etc/xdg/weston/weston.ini

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+[core]
+require-input=false
+locking=false
+idle-time=0
+background-color=0x00ffffff
+background-type=scale
+panel-position=none
+startup-animation=none
+close-animation=none
+
+[shell]
+background-color=0xff002244
+clock-format=minutes
+locking=false
+
+[libinput]
+touchscreen_calibrator=true
+calibration_helper=/usr/bin/calibration-helper
+
+[launcher]
+path=/usr/bin/weston-terminal
+icon=/usr/share/icons/gnome/24x24/apps/utilities-terminal.png
+
+[launcher]
+path=/usr/bin/launch-calibration
+icon=/usr/share/icons/gnome/24x24/apps/utilities-terminal.png
+
+[launcher]
+path=/usr/bin/weston-simple-egl
+icon=/usr/share/icons/gnome/24x24/apps/utilities-terminal.png
+
+[output]
+name=UNNAMED-1
+mode=320x240
+ui-size=320x240
+priority=9
+seat=seat-weston

overlay/usr/bin/calibration-helper

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+#!/bin/bash
+
+set -e
+
+SYSPATH="$1"
+MATRIX="$2 $3 $4 $5 $6 $7"
+
+echo "$1 $2 $3 $4 $5 $6 $7" > /root/tcc
+
+DEV_PATH=$(udevadm info $SYSPATH --query=property | awk -- 'BEGIN { FS="=" } { if ($1 == "DEVPATH") { print $2; exit } }')
+
+echo "$DEV_PATH"
+
+[ -z "$DEV_PATH" ] && exit 1
+
+echo "ACTION!=\"remove\", SUBSYSTEM==\"input\", DEVPATH==\"$DEV_PATH\", ENV{ID_INPUT_TOUCHSCREEN}==\"1\", ENV{LIBINPUT_CALIBRATION_MATRIX}=\"$MATRIX\"" > /etc/udev/rules.d/99-touchscreen-calibration.rules

overlay/usr/bin/launch-calibration

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+#!/bin/bash
+
+DEV_PATH="/sys"$(udevadm info /dev/input/by-path/platform-fe050000.spi-cs-1-event --query=property |\
+awk -- 'BEGIN { FS="=" } { if ($1 == "DEVPATH") { print $2; exit } }')
+weston-touch-calibrator "$DEV_PATH"