Hello,
I’m using a Yocto image based on the BSP 6.2 tdx-reference-multimedia-image on a Verdin iMX8MM. A 1920x1200 MIPI-DSI touch display is connected and working with weston.
Is it possible to switch on/off this display by command line? And not only the backlight.
DESCRITPTION = "Utility to manage outputs of a Wayland compositor"
HOMEPAGE = "https://sr.ht/~emersion/wlr-randr/"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://LICENSE;md5=07e8a8f2dc9e6a7f131e81037398c61b"
#PV = "0.4.0"
SRCREV = "fdde0d1d1ce940febb9b6ea6b2faa97f4e81a788"
PV = "0.1+git${SRCPV}"
#SRC_URI = "git://git.sr.ht/~emersion/wlr-randr;branch=0.4.0;protocol=https"
SRC_URI = "git://git.sr.ht/~emersion/wlr-randr;branch=master;protocol=https"
S = "${WORKDIR}/git"
inherit meson pkgconfig
DEPENDS:append = " wayland"
do_install() {
install -d ${D}/${bindir_native}
install -m 0755 wlr-randr ${D}/${bindir_native}
}
but got the error during configuring that the dependency wayland-scanner is missing.
- I found the file
/sys/class/drm/card1-DSI-1/power/control but don’t know which arguments it takes
Best regards,
Markus
Hi @Mowlwurf
I’m not 100% if it works but eventually, you can turn it off by using dpms:
# Use modetest to find out which id your connector has
modetest
.....
id encoder status name size (mm) modes encoders
236 235 connected eDP-1 300x190 1 235
modetest -M imx-drm -w 236:DPMS:3
This should turn off the display, and:
modetest -M imx-drm -w 236:DPMS:0
Should turn it on again. 236 is the id, you would have to change it to the number for your connector.
Regards,
Stefan
Hi @stefan_e.tx,
thank you for your fast response.
I tried your suggestion, but unfortunately had no success:
root@verdin-imx8mm-07220244:~# modetest
trying to open device 'i915'...failed
trying to open device 'amdgpu'...failed
trying to open device 'radeon'...failed
trying to open device 'nouveau'...failed
trying to open device 'vmwgfx'...failed
trying to open device 'omapdrm'...failed
trying to open device 'exynos'...failed
trying to open device 'tilcdc'...failed
trying to open device 'msm'...failed
trying to open device 'sti'...failed
trying to open device 'tegra'...failed
trying to open device 'imx-drm'...done
Encoders:
id crtc type possible crtcs possible clones
34 33 DSI 0x00000001 0x00000001
Connectors:
id encoder status name size (mm) modes encoders
35 34 connected DSI-1 136x217 1 34
modes:
index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot
#0 1200x1920 59.75 1200 1280 1304 1364 1920 1936 1940 1956 159420 flags: ; type: preferred, driver
props:
1 EDID:
flags: immutable blob
blobs:
value:
2 DPMS:
flags: enum
enums: On=0 Standby=1 Suspend=2 Off=3
value: 0
5 link-status:
flags: enum
enums: Good=0 Bad=1
value: 0
6 non-desktop:
flags: immutable range
values: 0 1
value: 0
4 TILE:
flags: immutable blob
blobs:
value:
CRTCs:
id fb pos size
33 39 (0,0) (1200x1920)
#0 1200x1920 59.75 1200 1280 1304 1364 1920 1936 1940 1956 159420 flags: ; type: preferred, driver
props:
24 VRR_ENABLED:
flags: range
values: 0 1
value: 0
Planes:
id crtc fb CRTC x,y x,y gamma size possible crtcs
31 33 39 0,0 0,0 0 0x00000001
formats: XR24 AR24 RG16 XB24 AB24 RX24 RA24 AR15 XR15 AB15 XB15 BG16
props:
8 type:
flags: immutable enum
enums: Overlay=0 Primary=1 Cursor=2
value: 1
32 zpos:
flags: immutable range
values: 0 0
value: 0
Frame buffers:
id size pitch
root@verdin-imx8mm-07220244:~# modetest -M imx-drm -w 35:DPMS:3
failed to set CONNECTOR 35 property DPMS to 3: Permission denied
Best regards,
Markus
Hi @Mowlwurf
Unfortunately, you are right and this is not working as long as weston is running. It seems weston does not support DPMS and because it is the master device controlling the drm device it will block modetest from taking over the control. The only way to achieve a proper power-off would be to expand weston. There seems to be a weston plugin that tries to address this. Maybe you can make it work?
Also see the discussion here:
Regards,
Stefan
Hello @stefan_e.tx
thank you for your reply.
I tried to create this extension with the following Yocto recipe:
DESCRITPTION = "Module for Weston compositor kiosk shell providing DPMS functionality"
HOMEPAGE = "https://github.com/akhilharihar/Weston-kiosk-shell-DPMS"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://LICENSE;md5=4b8ef887b5d26d4b038225869bda92d3"
PV = "0.2"
SRC_URI = "file://Weston-kiosk-shell-DPMS-${PV}.tar.gz"
inherit meson pkgconfig
DEPENDS = "weston"
S = "${WORKDIR}/Weston-kiosk-shell-DPMS-${PV}"
do_install() {
install -d ${D}/${bindir_native}
install -m 0755 dpms-client ${D}/${bindir_native}
}
But again I get the error message
| Did not find CMake 'cmake'
| Found CMake: NO
| Build-time dependency wayland-scanner found: NO (tried pkgconfig)
|
| ../Weston-kiosk-shell-DPMS-0.2/meson.build:19:0: ERROR: Dependency "wayland-scanner" not found, tried pkgconfig
What do I have to add to the recipe so that wayland-scanner is found?
Best regards,
Markus
Hi @Mowlwurf
I guess you would have to add wayland-native as dependency:
DESCRITPTION = "Module for Weston compositor kiosk shell providing DPMS functionality"
HOMEPAGE = "https://github.com/akhilharihar/Weston-kiosk-shell-DPMS"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://LICENSE;md5=4b8ef887b5d26d4b038225869bda92d3"
PV = "0.2"
SRC_URI = "file://Weston-kiosk-shell-DPMS-${PV}.tar.gz"
inherit meson pkgconfig
DEPENDS = "weston wayland-native"
S = "${WORKDIR}/Weston-kiosk-shell-DPMS-${PV}"
do_install() {
install -d ${D}/${bindir_native}
install -m 0755 dpms-client ${D}/${bindir_native}
}
Regards,
Stefan
Hi @stefan_e.tx ,
that was a good hint, thank you.
Now I get the following error:
../Weston-kiosk-shell-DPMS-0.2/meson.build:43:0: ERROR: Include dir /usr/include/libweston-10 does not exist.
Why does the recipe search the directory in my host rootfs instead of the working directory tmp/work/cortexa53-mx8mm-tdx-linux/weston-kiosk-shell-dpms/0.2-r0/recipe-sysroot/usr/include?
Best regards,
Markus
Hi @Mowlwurf
I’m not a meson expert but what about adding a patch similar to this?
diff --git a/meson.build b/meson.build
index f1fb908..770bbf9 100644
--- a/meson.build
+++ b/meson.build
@@ -10,7 +10,10 @@ libweston_version = 10
dir_prefix = get_option('prefix')
dir_lib = dir_prefix / get_option('libdir')
dir_module_weston = dir_lib / 'weston'
+dir_system_include = get_option('includedir')
+if dir_system_inclue == ''
dir_system_include = '/usr/include'
+endif
weston = dependency('libweston-@0@'.format(libweston_version), method: 'pkg-config')
wayland_server = dependency('wayland-server', method: 'pkg-config')
Regards,
Stefan
Hello @stefan_e.tx,
I am completely new to meson, but with your help and an additional configuration parameter for meson (EXTRA_OEMESON) I got it working.
My recipe weston-kiosk-shell-dpms now looks as follow:
DESCRITPTION = "Module for Weston compositor kiosk shell providing DPMS functionality"
HOMEPAGE = "https://github.com/akhilharihar/Weston-kiosk-shell-DPMS"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://LICENSE;md5=4b8ef887b5d26d4b038225869bda92d3"
FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
SRCREV = "5cf171084c02b468c40777c22243925fd900dc66"
PV = "0.2+git${SRCPV}"
SRC_URI = "git://github.com/akhilharihar/Weston-kiosk-shell-DPMS;branch=main;protocol=https"
SRC_URI += "file://weston-kiosk-shell-dpms.patch"
S = "${WORKDIR}/git"
inherit meson pkgconfig
DEPENDS = "weston wayland-native"
EXTRA_OEMESON += "--prefix=${STAGING_DIR_TARGET}/usr"
do_install() {
install -d ${D}/${bindir_native}
install -m 0755 dpms-client ${D}/${bindir_native}
install -d ${D}/${libdir_native}/weston
install -m 0755 kiosk-shell-dpms.so ${D}${libdir_native}/weston
}
FILES:${PN} += "\
${bindir_native}/* \
${libdir_native}/weston/* \
"
The patch for the meson.build:
index f1fb908..cae3ee9 100644
--- a/meson.build
+++ b/meson.build
@@ -10,7 +10,10 @@ libweston_version = 10
dir_prefix = get_option('prefix')
dir_lib = dir_prefix / get_option('libdir')
dir_module_weston = dir_lib / 'weston'
-dir_system_include = '/usr/include'
+dir_system_include = dir_prefix / get_option('includedir')
+if dir_system_include == ''
+ dir_system_include = '/usr/include'
+endif
weston = dependency('libweston-@0@'.format(libweston_version), method: 'pkg-config')
wayland_server = dependency('wayland-server', method: 'pkg-config')
I’ve tested it on my system and it works 
Thank you very much for your help!
I just have one more question:
To activate the weston extension when building the image I added the following to my image recipe
weston_kiosk_shell_dpms_modify_ini() {
echo "$(awk '{print} /[core]/ && !x {print "shell=kiosk-shell.so"; x=1}' ${IMAGE_ROOTFS}${sysconfdir}/xdg/weston/weston.ini)" > ${IMAGE_ROOTFS}${sysconfdir}/xdg/weston/weston.ini
echo "$(awk '/^modules=/ && !x {$0=$0",kiosk-shell-dpms.so"; x=1} 1' ${IMAGE_ROOTFS}${sysconfdir}/xdg/weston/weston.ini)" > ${IMAGE_ROOTFS}${sysconfdir}/xdg/weston/weston.ini
}
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_INSTALL", "weston-kiosk-shell-dpms", "weston_kiosk_shell_dpms_modify_ini; ", "", d)}'
Is there a more elegant way to modify the weston.ini? It would be best to do it directly in the recipe of the extension.
Best regards,
Markus
Hi @Mowlwurf
Great to hear that it works and thanks a lot for sharing the solution, this will most likely help others to solve the issue as well!
Regarding the weston.ini file, there is the recipe openembedded-core/meta/recipes-graphics/wayland/weston-init.bb which addds the init file. You can just point to your weston.ini file by adding a bbappend:
weston-init.bbappend:
FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
Then you can put your weston.ini into the weston-init directory in the folder where you store the weston-init.bbappend.
Regards,
Stefan
Hello @stefan_e.tx,
I am already modifying the weston.ini in a weston-init.bbappend. I was hoping that it is also possible to modify the weston.ini from within the extension recipe. This would have made it an all-in-one solution.
Thanks again for your help!
Best regards,
Markus
