Getting DSI LCD and HDMI output working with Qt embedded on Raspberry PI 3B+
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wrote on 17 Mar 2020, 15:06 last edited by
Hello folks,
I have build a boot2qt image for a raspberry PI 3B+.
It includes kernel version Linux b2qt-raspberrypi3 4.19.71
Yocto 2.7.2
Raspberry firmware: 0e6daa5106dd4164474616408e0dc24f997ffcf3The DSI display is phisically working: in the early phase of the boot I see the console on it.
I have added the follwing to the kernel's boot parameters:
video=DSI-1:800x480M@60mAdded the following to the config.txt:
dtoverlay=vc4-kms-v3d
dtoverlay=rpi-ft5406
max_framebuffers=2But still I have only a /dev/fb0 and the Qt applications does not see the DSI between the QGuiApplication::screens() list
Any help would be highliy appericiated!
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wrote on 17 Mar 2020, 17:57 last edited by
Hi,
Did you use the meta-boot2qt?
If yes, which image did you built exactly? Because there are actually 4 available images in the meta: -
wrote on 17 Mar 2020, 18:19 last edited by
Hello @Clement135
I built the b2qt-embedded-qt5-image.bb
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wrote on 18 Mar 2020, 11:02 last edited by
I have managed to sort out the issue:
https://www.raspberrypi.org/forums/viewtopic.php?f=108&t=268204&p=1628265#p1628265I needed to switch from vc4-kms-v3d to vc4-fkms-v3d
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