1 PACKAGES += xserver-xorg-input-evdev xinput xinput-calibrator
5 ### Waveshare 5 Inch Display ###
8 hdmi_cvt=800 480 60 6 0 0 0
10 dtoverlay=ads7846,cs=1,penirq=25,penirq_pull=2,speed=50000,keep_vref_on=0,swapxy=0,pmax=255,xohms=150,xmin=200,xmax=3900,ymin=200,ymax=3900
13 export display_ws5inch_cfg display_ws5inch_rotation
15 define display_ws5inch_cfg :=
17 Identifier "evdev touchscreen catchall"
18 MatchIsTouchscreen "on"
19 Option "Calibration" "200 3950 250 4000"
20 MatchDevicePath "/dev/input/event*"
25 define display_ws5inch_rotation :=
26 # Keep touch matrix rotated in accordance with screen rotation
28 oldrotate="$${rotate}"
29 rotate="$$(xrandr |grep primary)"
30 rotate="$${rotate#*+0+0 }"
31 rotate="$${rotate% (*}"
33 [ "$${oldrotate}" = "$${rotate}" ] || case $$rotate in
34 left) xinput set-prop 'ADS7846 Touchscreen' 'Coordinate Transformation Matrix' 0 -1 1 1 0 0 0 0 1;;
35 right) xinput set-prop 'ADS7846 Touchscreen' 'Coordinate Transformation Matrix' 0 1 0 -1 0 1 0 0 1;;
36 inverted) xinput set-prop 'ADS7846 Touchscreen' 'Coordinate Transformation Matrix' -1 0 1 0 -1 1 0 0 1;;
37 *) xinput set-prop 'ADS7846 Touchscreen' 'Coordinate Transformation Matrix' 1 0 0 0 1 0 0 0 1;;
42 .PHONY: _display_ws5inch
43 _config: _display_ws5inch
44 _display_ws5inch: ${CFGROOT} _copy _mount
45 # Rough touch calibration
46 mkdir -p "$${CFGROOT}/usr/share/X11/xorg.conf.d/"
47 printf '%s\n' "$${display_ws5inch_cfg}" >"$${CFGROOT}/usr/share/X11/xorg.conf.d/45-evdev.conf"
48 # Resolution / Rotation stuff
49 mkdir -p "$${CFGROOT}/etc/X11/Xsession.d/"
50 printf 'xrandr --size 800x480\n' >"$${CFGROOT}/etc/X11/Xsession.d/10display_resolution"
51 printf '%s\n' "$$display_ws5inch_rotation" >"$${CFGROOT}/etc/X11/Xsession.d/20touch_rotation"
52 # Correct DPI scaling, although application support is mediocre
53 mkdir -p "$${CFGROOT}/etc/X11/Xresources/"
54 printf 'Xft.dpi: 180\n' >"$${CFGROOT}/etc/X11/Xresources/dpi_resolution"
55 # Workaround for applications that do not handle DPI scaling correctly
56 -sed -i 's;^Exec=;Exec=env GDK_DPI_SCALE=.5 ;' \
57 $${CFGROOT}/usr/share/applications/chromium*.desktop \
58 $${CFGROOT}/usr/share/applications/firefox*.desktop \
59 $${CFGROOT}/usr/share/applications/exo-web-browser.desktop