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  1. Qt
  2. QTBUG-76889

New Device / eglfs on Raspberry Pi 4 with Raspbian Buster

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    Details

    • Type: Task
    • Status: Closed
    • Priority: P3: Somewhat important
    • Resolution: Fixed
    • Affects Version/s: 5.12.4, 5.13.0
    • Fix Version/s: None
    • Component/s: Build System
    • Environment:

      Raspbian Buster on Raspberry Pi 4

    • Platform/s:
      Linux/Other display system
    • Technical Risk:
      Low
    • Commits:
      see comment

      Description

      For new Raspberry PI 4 with Raspbian Buster installed, we need a solution to get hardware accelaration eglfs running again. No X, no wayland.

      • New SOC Broadcom 2711
      • New Cores ARM Cortex-A72
      • Rasbian changed default to mesa vc4-fkms-v3d
      • Broadcom videocore driver is still there /opt/vc but not working with RPi4?

       

      Perhaps we can get a new qmake.conf here: /qtbase/mkspecs/devices/ for the Raspberry Pi 4 Device to get the eglfs running.

      First try:

      I build 5.12.4 with the existing device linux-rasp-pi3-vc4-g++. My qml code is running with the following message and a very poor performance:
      >> Running on a software rasterizer (LLVMpipe), expect limited performance.

       

      Second try:

      I disabled the vc4-fkms-v3d driver and uninstalled the mesa stuff. Linked to /opt/vc/lib/libbrcmGLESv2.so and /opt/vc/lib/libbrcmEGL.so

      Build 5.12.4 with linux-rasp-pi3-g++ Device succsessful.-> config.summary shows: 

      EGLFS Raspberry Pi ................... yes

      My qml code is starting, console log OK but no qml widget on the screen. Aborted without debug informations.

       

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            Assignee:
            qtbuildsystem Qt Build System Team
            Reporter:
            wapel Marc
            Votes:
            2 Vote for this issue
            Watchers:
            7 Start watching this issue

              Dates

              Created:
              Updated:
              Resolved:

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