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  1. Qt
  2. QTBUG-63272

DRM dumb buffer platform support slow on unaccelerated hardware

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P2: Important P2: Important
    • 5.11.0
    • 5.9.1
    • QPA: LinuxFB
    • None
    • SAMA5D4 Xplained hardware with zero hardware acceleration, but a DRM/KMS driver.
    • f93003e0c6886402d17c3aeff2145c62a871ff05

      The DRM/KMS "dumb buffer" platform support (see QTBUG-56306) is currently hard coded to QImage::Format_ARGB32.  This is a significant performance hit on unaccelerated hardware for basic usage of the dumb buffer backend. This makes using the dumb buffer support very slow compared to fbdev due to differences in pixel format with all other things equal.

       

        1. 0001-Add-support-for-specifying-DRM-dumb-buffer-pixel-for.patch
          4 kB
        For Gerrit Dashboard: QTBUG-63272
        # Subject Branch Project Status CR V
        205914,2 linuxfb/drm: Pick up the format from the config file dev qt/qtbase Status: MERGED +2 0

            lagocs Laszlo Agocs
            joshua.henderson Joshua Henderson
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              Created:
              Updated:
              Resolved:

                There are no open Gerrit changes